阅读说明：本技术 一种紧急脱离系统 (Emergency release system ) 是由 苗增 周鑫华 刘志成 姚贵昌 顾曙光 邵彦山 吴海龙 于 2020-05-09 设计创作，主要内容包括：本发明公开了一种紧急脱离系统,包括：紧急脱离装置,包括待脱离的两部件；数据采集模块,用于采集两部件各自所依附装置的运行数据,并通过数据传输模块传输至数据分析处理模块；数据分析处理模块,用于判定所依附装置是否出现工作异常故障及其故障等级,并触发预警模块工作；预警模块,用于触发紧急脱离控制装置工作；紧急脱离控制装置,用于控制紧急脱离装置执行紧急脱离动作；显示模块、数据上传模块,分别用于对其他模块自身的状态以及处理结果信息进行上传和显示。本发明紧急脱离系统,可根据不同的工况要求,实现紧急脱离装置所依附装置进行快速、安全、可靠的紧急脱离作业,同时满足不同紧急状况的工作响应,确保所依附装置作业过程安全。(The invention discloses an emergency release system, comprising: the emergency separation device comprises two parts to be separated; the data acquisition module is used for acquiring the operation data of the devices attached to the two parts and transmitting the operation data to the data analysis processing module through the data transmission module; the data analysis processing module is used for judging whether the attached device has abnormal working faults and fault grades thereof and triggering the early warning module to work; the early warning module is used for triggering the emergency separation control device to work; the emergency separation control device is used for controlling the emergency separation device to execute an emergency separation action; and the display module and the data uploading module are respectively used for uploading and displaying the self state of other modules and the processing result information. The emergency release system can realize the quick, safe and reliable emergency release operation of the device to which the emergency release device is attached according to different working condition requirements, simultaneously meet the working response of different emergency conditions and ensure the safety of the operation process of the attached device.)

1. An emergency disconnect system, the system comprising: the emergency separation device comprises an emergency separation device, a data acquisition module, a data transmission module, a data analysis processing module, an early warning module, an emergency separation control device, a display module and a data uploading module;

the emergency disengaging device comprises a first part and a second part which are movably connected;

the data acquisition module is used for acquiring the operation data of a first device and a second device to which the first component and the second component are respectively attached;

the data transmission module is used for transmitting the operating data to the data analysis processing module;

the data analysis processing module is used for analyzing and processing the operating data, judging whether the first device and the second device have abnormal working faults and the grades of the faults, and sending fault instructions of corresponding grades to trigger the early warning module to work;

the early warning module is used for sending an emergency separation alarm instruction of a corresponding grade to the emergency separation control device according to the grade of the received fault instruction;

the emergency separation control device is used for controlling the emergency separation device to execute the emergency separation action of the corresponding grade according to the received emergency separation alarm instruction;

the display module is used for displaying the self state information and the processing result information of other modules;

and the data uploading module is used for uploading the state information and the processing result information of other modules to the client so as to realize remote control and monitoring of the emergency release system.

2. The emergency disconnect system of claim 1, wherein the emergency disconnect control device comprises: the hydraulic control system comprises a one-way valve (21), a first reversing valve (23), a two-way balance valve (24), a driving oil cylinder (11), a disengaging oil cylinder (10), a second reversing valve (27), a third reversing valve (28) and a fourth reversing valve (29);

the driving oil cylinder (11) and the disengaging oil cylinder (10) are both hydraulic power executing mechanisms, wherein the telescopic motion of a cylinder rod in the driving oil cylinder (11) realizes the opening or closing of a first component so as to open or close an external channel of the first component; the telescopic motion of a cylinder rod in the disengaging oil cylinder (10) realizes the closing of the first part and the second part and the separation of the two parts;

the check valve (21) is arranged at an inlet of the pressure oil source P and has a one-way stopping function, the pressure oil source P supplies oil to the hydraulic control system through the check valve (21), and the pressure oil source P is stopped when the pressure oil source P is reversed;

the first reversing valve (23) is used for ensuring that the driving oil cylinder (11) keeps in-situ no action when the device attached to the emergency release device is in normal operation, namely the early warning module does not give an alarm; when the early warning module is in a primary warning state or the primary warning state is released, the early warning module is used for controlling a cylinder rod of the driving oil cylinder (11) to perform telescopic motion and driving the first component to close or open;

the bidirectional balance valve (24) is arranged between the first reversing valve (23) and the large and small cavity hydraulic circuits of the driving oil cylinder (11) and is used for realizing locking or opening of the large and small cavity hydraulic circuits of the driving oil cylinder (11);

the second reversing valve (27) is arranged between the fourth reversing valve (29) and a large-cavity hydraulic loop of the disengaging oil cylinder (10) and is used for opening or closing the primary and/or secondary disengaging operation of the emergency disengaging device;

the third reversing valve (28) is used for controlling a cylinder rod of the driving oil cylinder (11) to perform telescopic motion and driving the first component to close when the early warning module is in a primary warning state and the emergency separation device executes primary separation operation; when the early warning module releases the primary alarm state and the primary separation operation of the emergency separation device is closed, the driving oil cylinder (11) is not operated, and the driving oil cylinder (11) is ensured to keep the working position unchanged;

the fourth reversing valve (29) is used for controlling a cylinder rod of the disengaging oil cylinder (10) to perform telescopic motion when the early warning module is in a secondary warning state and the emergency disengaging device executes secondary disengaging operation on the basis of primary disengaging operation, and driving the first part and the second part to close and separate the first part and the second part; when the secondary separation operation of the emergency separation device is finished or closed, a cylinder rod for controlling the separation oil cylinder (10) is restored to the initial state.

3. The emergency release system according to claim 2, wherein the emergency release control means further comprises an accumulator (22) as an emergency power source for supplying oil to the hydraulic control system in the absence of the pressure oil source P; the oil in the accumulator (22) is provided by a pressure oil source P, and the accumulator (22) does not leak under the action of the check valve (21).

4. Emergency release system according to claim 2, wherein the first directional control valve (23) is adapted to ensure that the actuation cylinder (11) remains in place without actuation and to control the telescopic movement of the rod of the actuation cylinder (11) to drive the first part to close or open, in particular by: when the device attached to the emergency release device is in normal operation, the first reversing valve (23) enables the large cavity and the small cavity of the driving oil cylinder (11) to be communicated, and the driving oil cylinder (11) does not act; when the early warning module is in a primary warning state, a large cavity of the driving oil cylinder (11) is connected with a system oil return T, a hydraulic oil source P acts on a small cavity of the driving oil cylinder (11) through the first reversing valve (3), a cylinder rod of the driving oil cylinder (11) retracts, and a first component is driven to be closed; when the primary alarm state is relieved, the small cavity of the driving oil cylinder (11) is connected with the system oil return T, the hydraulic oil source P acts on the large cavity of the driving oil cylinder (11) through the first reversing valve (23), and the cylinder rod of the driving oil cylinder (11) extends to drive the first component to be opened.

5. The emergency release system according to claim 2 or 4, wherein the first reversing valve (23) is a three-position four-way electro-proportional reversing valve, and wherein the machine can be Y-shaped; the second reversing valve (27) adopts a manual reversing valve.

6. The emergency release system according to claim 2, wherein the third directional control valve (28) is adapted to control the telescopic movement of the rod of the actuation cylinder (11), to actuate the closing of the first component, and to ensure that the actuation cylinder (11) remains in the working position, and is embodied in such a way that: the third reversing valve (28) is arranged between the large cavity of the driving oil cylinder (11) and the system return oil T, when the emergency separation device executes primary separation operation, the system return oil T is communicated with the large cavity of the driving oil cylinder (11) through the third reversing valve (28), and a cylinder rod of the driving oil cylinder (11) retracts to drive the first component to close; when the first-stage separation operation of the emergency separation device is closed, the system return oil T is isolated from the large cavity of the driving oil cylinder (11) through a third reversing valve (28).

7. The emergency release system according to claim 2, wherein the fourth directional control valve (29) is configured to control the rod of the release cylinder (10) to perform a telescopic movement, to drive the first member and the second member to close and release the first member and the second member, and to control the rod of the release cylinder (10) to return to an initial state, and is implemented in such a way that: when secondary separation operation is carried out on the basis of primary separation operation, a pressure oil source P acts on a large cavity of the separation oil cylinder (10) through a fourth reversing valve (29) and a second reversing valve (27), a cylinder rod of the separation oil cylinder (10) extends out, and the first component and the second component are driven to close and are separated; when the two-stage separation operation of the emergency separation device is finished or closed, the pressure oil source P acts on the small cavity of the separation oil cylinder (10) through the fourth reversing valve (29), and the cylinder rod of the separation oil cylinder (10) performs retraction movement.

8. The emergency release system according to claim 1 or 2, wherein the emergency release means comprises a cryogenically upper ball valve (1), a cryogenically lower ball valve (2), a valve hoop (5);

a driving fixing frame (12) is fixed on the low-temperature upper ball valve (1), and the disengaging oil cylinder (10) and the driving oil cylinder (11) are fixed on the driving fixing frame (12); an upper push rod (13) is arranged on the disengaging oil cylinder (10), and a lower push rod (14) is arranged at the lower part of the upper push rod (13); a disconnecting flange sealing ring (3) is arranged between the low-temperature upper ball valve (1) and the low-temperature lower ball valve (2), the hoop supports (4) are fixed on the low-temperature upper ball valve (1), one ends of two valve hoops (5) are connected with the hoop supports (4) through rotating shafts, and the other ends of the two valve hoops are connected through clamping rods (6); the back parts of the upper push rod (13) and the lower push rod (14) are fixedly connected with a push rod (13-1); the low-temperature upper ball valve (1) and the low-temperature lower ball valve (2) are respectively provided with a rotary rocker (17); the two rotary rockers (17) are respectively connected with the valve core rotating shafts (15) of the low-temperature upper ball valve (1) and the low-temperature lower ball valve (2); the driving oil cylinder (11) is connected with one end of an upper end rotating rocker (17) through a rotating shaft; the back parts of the upper push rod (13) and the lower push rod (14) are fixedly connected with a push rod (13-1); the upper and lower rotary rockers (17) are respectively contacted with the lower ends of the upper and lower push rods (13-1); a push block (18) for pushing the clamping rod (6) is arranged between the upper push rod (13) and the lower push rod (14); when the early warning module enters a primary alarm, the driving oil cylinder (11) works to drive the low-temperature upper ball valve (1) to be closed, and after the alarm is relieved, the low-temperature upper ball valve (1) is driven to be opened; when the early warning module enters a secondary warning from a primary warning, the separation oil cylinder (10) further drives the ball valve (2) to be closed at low temperature, and pushes the clamping rod (6) to open the valve hoop (5); when the early warning module directly gets into the second grade and reports to the police, break away from hydro-cylinder (10), drive hydro-cylinder (11) simultaneous working, ball valve (1) are closed simultaneously on the drive low temperature, ball valve (2) are down to the low temperature to promote clamping bar (6) and open valve staple bolt (5).

9. The emergency release system according to claim 8, wherein the emergency release device further comprises an upper valve position sensor, a lower valve position sensor, the upper valve position sensor being mounted on a rotary rocker (17) at an upper end for detecting an on-off state of the low temperature upper ball valve (1); the lower valve position sensor is arranged on the driving fixing frame (12) and used for detecting the opening and closing state of the low-temperature lower ball valve (2) through detecting the position of the push rod.

10. The emergency release system of claim 8, further comprising a release signal sensor disposed inside the other end of the valve hoop (5) for detecting the open/close state of the two hoop valves (5).

Technical Field

The invention belongs to the field of intelligent loading and unloading, particularly relates to the technical field of emergency separation, and particularly relates to an emergency separation system.

Background

A loading arm is generally used when fossil fuels are loaded or unloaded between a fossil fuel transport ship such as crude oil, gasoline, light oil, and natural gas (LNG or LPG) and a storage tank on land. In order to prevent the loading arm from being damaged in the event of unexpected emergency such as rapid movement of the tanker, the onset of an earthquake or a tsunami, or a fire due to gusts of wind, currents, etc., during loading or unloading by connecting the loading arm to the manifold of the LNG pipe of the LMG carrier, an emergency release system must be installed on the loading arm.

The existing marine emergency separation system only focuses on a separation device, but the whole closed-loop control system for separation is rarely researched, and a stable and complete emergency separation system can better ensure safe and effective execution of separation action. In addition, the existing system can only meet single emergency separation operation, can not perform different response processing according to alarm levels, can not meet different working condition requirements, and has poor adaptability.

Disclosure of Invention

The invention aims to provide an emergency separation system suitable for a ship loading and unloading arm so as to complete quick, safe and reliable emergency separation of an LNG tanker and a receiving station pipeline and meet the working response of different emergency conditions.

The technical solution for realizing the purpose of the invention is as follows: an emergency disconnect system, the system comprising: the emergency separation device comprises an emergency separation device, a data acquisition module, a data transmission module, a data analysis processing module, an early warning module, an emergency separation control device, a display module and a data uploading module;

the emergency disengaging device comprises a first part and a second part which are movably connected;

the data acquisition module is used for acquiring the operation data of a first device and a second device to which the first component and the second component are respectively attached;

the data transmission module is used for transmitting the operating data to the data analysis processing module;

the data analysis processing module is used for analyzing and processing the operating data, judging whether the first device and the second device have abnormal working faults and the grades of the faults, and sending fault instructions of corresponding grades to trigger the early warning module to work;

the early warning module is used for sending an emergency separation alarm instruction of a corresponding grade to the emergency separation control device according to the grade of the received fault instruction;

the emergency separation control device is used for controlling the emergency separation device to execute the emergency separation action of the corresponding grade according to the received emergency separation alarm instruction;

the display module is used for displaying the self state information and the processing result information of other modules;

and the data uploading module is used for uploading the state information and the processing result information of other modules to the client so as to realize remote control and monitoring of the emergency release system.

Further, the emergency release control device includes: the hydraulic control system comprises a one-way valve, a first reversing valve, a two-way balance valve, a driving oil cylinder, a disengaging oil cylinder, a second reversing valve, a third reversing valve and a fourth reversing valve;

the driving oil cylinder and the disengaging oil cylinder are both hydraulic power executing mechanisms, wherein a cylinder rod in the driving oil cylinder stretches and retracts to open or close the first component so as to open or close an outward channel of the first component; the first part and the second part are closed and the two parts are separated by the telescopic motion of a cylinder rod in the disengaging oil cylinder;

the check valve is arranged at the inlet of the pressure oil source P and has a one-way stop function, the pressure oil source P supplies oil to the hydraulic control system through the check valve, and the hydraulic control system is stopped when the pressure oil source P is reversed;

the first reversing valve is used for ensuring that the driving oil cylinder keeps in-situ no action when the device attached to the emergency release device is in normal operation, namely the early warning module does not give an alarm; when the early warning module is in a primary warning state or the primary warning state is released, the early warning module is used for controlling a cylinder rod of the driving oil cylinder to perform telescopic motion and driving the first component to close or open;

the bidirectional balance valve is arranged between the first reversing valve and the large and small cavity hydraulic circuits of the driving oil cylinder and is used for realizing locking or opening of the large and small cavity hydraulic circuits of the driving oil cylinder;

the second reversing valve is arranged between the fourth reversing valve and the large-cavity hydraulic loop of the disengaging oil cylinder and is used for opening or closing the primary and/or secondary disengaging operation of the emergency disengaging device;

the third reversing valve is used for controlling a cylinder rod of the driving oil cylinder to perform telescopic motion and driving the first component to close when the early warning module is in a primary warning state and the emergency separation device executes primary separation operation; when the early warning module relieves the primary warning state and the primary separation operation of the emergency separation device is closed, the driving oil cylinder is not operated and is used for ensuring that the driving oil cylinder keeps the working position unchanged;

the fourth reversing valve is used for controlling a cylinder rod of the disengaging oil cylinder to perform telescopic motion when the early warning module is in a secondary warning state and the emergency disengaging device executes secondary disengaging operation on the basis of primary disengaging operation, and driving the first component and the second component to close and separate the two components; when the secondary separation operation of the emergency separation device is finished or closed, a cylinder rod for controlling the separation oil cylinder is restored to the initial state.

Furthermore, the emergency release control device also comprises an energy accumulator which is used as an emergency power source and supplies oil to the hydraulic control system when the pressure oil source P is lacked; the oil in the accumulator is provided by a pressure oil source P, and the accumulator does not leak under the action of a one-way valve.

Further, the first reversing valve is used for ensuring that the driving oil cylinder keeps in-situ no action, controlling a cylinder rod of the driving oil cylinder to perform telescopic motion, and driving the first component to close or open, and is specifically realized as follows: when the device attached to the emergency release device is in normal operation, the first reversing valve enables the large cavity and the small cavity of the driving oil cylinder to be communicated, and the driving oil cylinder does not act; when the early warning module is in a primary warning state, a large cavity of the driving oil cylinder is connected with a system oil return T, a hydraulic oil source P acts on a small cavity of the driving oil cylinder through a first reversing valve, a cylinder rod of the driving oil cylinder retracts, and a first component is driven to close; when the primary alarm state is relieved, the small cavity of the driving oil cylinder is connected with the system oil return T, the hydraulic oil source P acts on the large cavity of the driving oil cylinder through the first reversing valve, the cylinder rod of the driving oil cylinder extends out, and the first component is driven to be opened.

Furthermore, the first reversing valve is a three-position four-way electric proportional reversing valve, and the middle machine can be Y-shaped; and the second reversing valve adopts a manual reversing valve.

Further, the third reversing valve is used for controlling a cylinder rod of the driving oil cylinder to perform telescopic motion, driving the first component to close, and ensuring that the driving oil cylinder keeps the working position unchanged, and the third reversing valve is specifically realized as follows: the third reversing valve is arranged between the large cavity of the driving oil cylinder and the system return oil T, when the emergency separation device executes primary separation operation, the system return oil T is communicated with the large cavity of the driving oil cylinder through the third reversing valve, and a cylinder rod of the driving oil cylinder retracts to drive the first component to close; when the emergency separation device is closed in the primary separation operation, the system return oil T is isolated from the large cavity of the driving oil cylinder through a third reversing valve.

Further, the fourth direction valve is used for controlling a cylinder rod of the disengaging cylinder to perform telescopic motion, driving the first component and the second component to close and make the two components disengage from each other, and controlling the cylinder rod of the disengaging cylinder to recover to an initial state, and the fourth direction valve is specifically realized as follows: when the second-stage separation operation is executed on the basis of the first-stage separation operation, the pressure oil source P acts on the large cavity of the separation oil cylinder through the fourth reversing valve and the second reversing valve, and the cylinder rod of the separation oil cylinder extends out to drive the first component and the second component to close and separate; when the secondary separation operation of the emergency separation device is finished or closed, the pressure oil source P acts on the small cavity of the separation oil cylinder through the fourth reversing valve, and the cylinder rod of the separation oil cylinder performs retraction movement.

Further, the emergency separation device comprises a low-temperature upper ball valve, a low-temperature lower ball valve and a valve hoop; a driving fixing frame is fixed on the low-temperature upper ball valve, and the separation oil cylinder and the driving oil cylinder are fixed on the driving fixing frame; an upper push rod is arranged on the disengaging oil cylinder, and a lower push rod is arranged at the lower part of the upper push rod; a disconnecting flange sealing ring is arranged between the low-temperature upper ball valve and the low-temperature lower ball valve, the low-temperature upper ball valve is fixedly provided with hoop supports, one ends of two valve hoops are connected with the hoop supports through rotating shafts, and the other ends of the two valve hoops are connected through clamping rods; push rods are fixedly connected to the back parts of the upper push rod and the lower push rod; the low-temperature upper ball valve and the low-temperature lower ball valve are respectively provided with a rotary rocker; the two rotary rockers are respectively connected with the valve core rotating shafts of the low-temperature upper ball valve and the low-temperature lower ball valve; the driving oil cylinder is connected with one end of the upper end rotary rocker through a rotating shaft; push rods are fixedly connected to the back parts of the upper push rod and the lower push rod; the upper and lower rotary rocking bars are respectively contacted with the lower ends of the upper and lower push rods; a push block for pushing the clamping rod is arranged between the upper push rod and the lower push rod; when the early warning module enters a primary alarm, the driving oil cylinder works to drive the low-temperature upper ball valve to be closed, and after the alarm is relieved, the driving oil cylinder drives the low-temperature upper ball valve to be opened; when the early warning module enters a secondary warning from a primary warning, the early warning module is separated from the oil cylinder to further drive the ball valve to be closed at low temperature and push the clamping rod to open the valve hoop; when the early warning module directly enters a secondary alarm, the separation oil cylinder and the driving oil cylinder work simultaneously to drive the low-temperature upper ball valve and the low-temperature lower ball valve to be closed simultaneously, and the clamping rod is pushed to open the valve hoop.

Furthermore, the emergency release device also comprises an upper valve position sensor and a lower valve position sensor, wherein the upper valve position sensor is arranged on a rotary rocker at the upper end and is used for detecting the switching state of the upper ball valve at low temperature; the lower valve position sensor is arranged on the driving fixing frame and used for detecting the on-off state of the ball valve at low temperature through detecting the position of the push rod.

Further, the emergency release device further comprises a release signal sensor, wherein the release signal sensor is arranged on the inner side of the other end of the valve hoop and used for detecting the opening and closing states of the two hoop valves.

Compared with the prior art, the invention has the following remarkable advantages: 1) the whole system is a complete closed-loop system, so that the real-time performance, safety, reliability and stability of emergency separation operation are improved; 2) the whole system can realize multi-stage early warning and multi-stage emergency separation, realize emergency state response of different levels, is beneficial to the step-by-step control of the system, avoids unnecessary resources and economic loss, and improves the safety and the working efficiency of the wharf; 3) the remote control and monitoring of the system can be realized, and the operability and safety of the system are further improved; 4) the whole emergency separation system can realize mechanical in-place interlocking and electrical interlocking according to the working range of the response loading and unloading arm and the external environment; 5) a hydraulic system started manually is adopted in the emergency separation control device, so that the false alarm rate can be reduced, and the safety and the reliability are further improved.

The present invention is described in further detail below with reference to the attached drawing figures.

Drawings

Fig. 1 is a block diagram of an emergency release system in one embodiment.

Fig. 2 is a perspective view of the construction of the emergency release apparatus in one embodiment.

Fig. 3 is a front view showing the construction of an emergency release apparatus according to an embodiment.

Fig. 4 is an exploded front view of the emergency release apparatus with the upper and lower links removed in one embodiment.

Fig. 5 is an enlarged view of the contact of the upper link and the upper rotary rocker of the emergency release apparatus according to one embodiment.

Fig. 6 is a schematic structural diagram of an emergency release control apparatus according to an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In one embodiment, in conjunction with fig. 1, there is provided an emergency disconnect system for a marine loading arm, the system comprising: the emergency separation device comprises an emergency separation device, a data acquisition module, a data transmission module, a data analysis processing module, an early warning module, an emergency separation control device, a display module and a data uploading module;

the emergency disengaging device comprises a first part and a second part which are movably connected;

the data acquisition module is used for acquiring the operation data of a first device and a second device to which the first component and the second component are respectively attached;

here, for a marine loading arm, the first part and the second part are mounted on the loading arm (which may be considered as a first device) and the vessel (which may be considered as a second device), respectively. Furthermore, aiming at the marine oil transportation operation, the oil pipeline of the loading and unloading arm is in butt joint with the first part, the oil pipeline on the ship is in butt joint with the second part, and the outward channels of the two parts are opened and are in butt joint with each other, so that the butt joint of the two oil pipelines can be realized, and the oil transportation operation is further realized.

Here, the operation data includes all data that can directly reflect or hide whether or not the first device and the second device have a failure.

The data transmission module is used for transmitting the operating data to the data analysis processing module;

here, the data transmission may be a wired transmission or a wireless transmission (bluetooth, lan, etc.). The latter is preferred.

The data analysis processing module is used for analyzing and processing the operating data, judging whether the first device and the second device have abnormal working faults and the grades of the faults, and sending fault instructions of corresponding grades to trigger the early warning module to work;

here, the analysis processing may include data filtering (removing apparently unreliable data, etc.), data classification (grouping together data reflecting the same operation state of the first device or the second device, or grouping together data reflecting state information of a specific part on the device), and calculation of index values describing the operation state of each device or the operation state of each part on each device based on the collected operation data.

Here, the determining whether the first device and the second device have the abnormal operation failure and the failure level thereof may include: and comparing the index value with a self-defined preset running state safety range corresponding to the index value, if the index value is located in the running state safety range, indicating that no abnormal working fault occurs, otherwise indicating that the abnormal working fault occurs, and then setting a fault level according to the degree value of the index value exceeding the running state safety range (for example, the value exceeds a first preset threshold value, the fault level is set as a first-level fault, the value exceeds a second preset threshold value, and the fault level is set as a second-level fault). Here, the number of failure levels and the level of the failure degree indicated by the failure level may be set according to actual requirements (for example, it may be considered that the primary failure level is lower than the secondary failure level, so that the first preset threshold value may be set to be smaller than the second preset threshold value).

The early warning module is used for sending an emergency separation alarm instruction of a corresponding grade to the emergency separation control device according to the grade of the received fault instruction;

the emergency separation control device is used for controlling the emergency separation device to execute the emergency separation action of the corresponding grade according to the received emergency separation alarm instruction;

the display module is used for displaying the self state information and the processing result information of other modules;

here, the own state information includes: whether the self work is abnormal or not;

the processing result information includes: the system comprises a data acquisition module, a data analysis processing module, a data uploading module, a data analysis processing module, an early warning module, an emergency separation control device, a data transmission module and a data transmission module, wherein the data acquisition module acquires operation data, the data analysis processing module acquires fault information, early warning information realized by the early warning module, control information of the emergency separation control device, separation state information of the emergency separation device, state information of whether the data uploading module uploads success and the like. Can be infinitely expanded according to actual requirements.

And the data uploading module is used for uploading the state information and the processing result information of other modules to the client so as to realize remote control and monitoring of the emergency release system.

Here, the client may be a mobile device client, a computer client, or a cloud, etc.

Here, the uploading may be performed by wired transmission or by wireless transmission (bluetooth, lan, etc.). The latter is preferred.

Further, in one embodiment, the emergency release control device includes: the hydraulic control system comprises a one-way valve 21, a first reversing valve 23, a two-way balance valve 24, a driving oil cylinder 11, a disengaging oil cylinder 10, a second reversing valve 27, a third reversing valve 28 and a fourth reversing valve 29;

the driving oil cylinder 11 and the disengaging oil cylinder 10 are both hydraulic power executing mechanisms, wherein the telescopic motion of a cylinder rod in the driving oil cylinder 11 realizes the opening or closing of a first part so as to open or close an outward channel of the first part; the telescopic movement of a cylinder rod in the disengaging oil cylinder 10 realizes the closing of the first part and the second part and the separation of the two parts;

the check valve 21 is arranged at an inlet of the pressure oil source P and has a one-way stop function, the pressure oil source P supplies oil to the hydraulic control system through the check valve 21, and the pressure oil source P is stopped when the pressure oil source P is reversed;

the first reversing valve 23 is used for ensuring that the driving oil cylinder 11 keeps in-situ no action when the device attached to the emergency release device is in normal operation, namely the early warning module does not give an alarm; when the early warning module is in a first-stage warning state or the first-stage warning state is released, the early warning module is used for controlling a cylinder rod of the driving oil cylinder 11 to perform telescopic motion and driving the first component to close or open;

here, the attached device is a loading arm for a ship.

The bidirectional balance valve 24 is arranged between the first reversing valve 23 and the large and small cavity hydraulic circuits of the driving oil cylinder 11 and is used for realizing locking or opening of the large and small cavity hydraulic circuits of the driving oil cylinder 11;

here, the lock means to ensure that the drive cylinder 11 remains in the home position without operation, whereby the first member can be reliably maintained in the original operating state; the opening means that the rod of the drive cylinder 11 performs telescopic movement.

Here, the adoption of the two-way balance valve 24 can automatically adjust the opening degree of the valve core, keep the motion process of the driving oil cylinder 11 stable and free from impact, and effectively relieve the damage to a structural member caused by the impact of the liquid when the first part is suddenly closed or opened when a pipeline of the loading and unloading arm conveys the liquid.

Here, the two-way balance valve 24 may be replaced by a combination of a two-way hydraulic lock and a one-way speed regulating valve set, wherein the two-way hydraulic lock is disposed between the first direction changing valve 23 and the large and small cavity hydraulic circuits of the driving cylinder 11, and is used for realizing locking or unlocking of the large and small cavity hydraulic circuits of the driving cylinder 11; the one-way speed regulating valve group comprises at least one-way speed regulating valve, is arranged on a large cavity hydraulic circuit and a small cavity hydraulic circuit of the driving oil cylinder 11 and is used for regulating the flow of hydraulic oil entering the driving oil cylinder 11 so as to control the movement speed of the driving oil cylinder 11. This approach, while achieving nearly the same effect as the bi-directional balancing valve 24, makes the system more complex.

The second reversing valve 27 is arranged between the fourth reversing valve 29 and the large-cavity hydraulic circuit of the disengaging oil cylinder 10 and is used for opening or closing the primary and/or secondary disengaging operation of the emergency disengaging device;

the third reversing valve 28 is used for controlling the cylinder rod of the driving oil cylinder 11 to perform telescopic motion and driving the first component to close when the early warning module is in a primary warning state and the emergency separation device executes primary separation operation; when the early warning module releases the primary alarm state and the primary separation operation of the emergency separation device is closed, the driving oil cylinder 11 is not operated, so that the driving oil cylinder 11 is ensured to keep the working position unchanged;

the fourth reversing valve 29 is used for controlling the cylinder rod of the disengaging oil cylinder 10 to perform telescopic motion when the early warning module is in a secondary warning state and the emergency disengaging device executes secondary disengaging operation on the basis of primary disengaging operation, and driving the first component and the second component to close and separate the two components; when the emergency release device secondary release operation is finished or turned off, the cylinder rod for controlling the release cylinder 10 is restored to the initial state.

Here, the cylinder rod of the disengagement cylinder 10 is returned to the initial state, so that interference during disengagement can be avoided, and dangerous situations such as damage to the loading arm and the unloading arm can be avoided.

By adopting the scheme of the embodiment, different response working conditions are realized through different alarm states, the change can be improved according to the states, the control system returns to the working state, the reversible operability of the control system is improved, the two parts are closed during the secondary alarm, the separation operation of the emergency separation device is realized, the system is controlled step by step, unnecessary economic loss is avoided, and the safety and the working efficiency of the wharf are improved.

Further, in one of the embodiments, the emergency release control device further includes an accumulator 22 as an emergency power source for supplying oil to the hydraulic control system in the absence of the pressure oil source P; the oil in the accumulator 22 is supplied from the pressure oil source P, and the accumulator 22 does not leak under the action of the check valve 21.

Here, the pressure oil source P partially acts on the P port of the first direction switching valve 23 to stand by, and partially supplies oil to the accumulator 22. When the pressure oil source P is not supplied, the one-way stop function of the one-way valve 21 ensures that the pressure oil of the energy accumulator 22 cannot leak, the oil is filled all the time, and the port P of the first reversing valve always keeps the pressure oil.

By adopting the scheme of the embodiment, the oil is supplied to the hydraulic control system when the pressure oil source P is lost, the power source can be ensured to exist constantly, the system can continuously, stably and reliably work, the oil of the energy accumulator is not drained under the action of the one-way valve, the frequency of frequently starting the hydraulic station to supplement the oil for the energy accumulator is reduced, and the service life of each part is prolonged.

Further, in one embodiment, the first direction valve 23 is used to ensure that the driving cylinder 11 remains in the original position without any action, and is used to control the cylinder rod of the driving cylinder 11 to perform a telescopic motion, so as to drive the first component to close or open, and is specifically implemented as: when the device attached to the emergency release device is in normal operation, the first reversing valve 23 enables the large cavity and the small cavity of the driving oil cylinder 11 to be communicated, and the driving oil cylinder 11 does not act; when the early warning module is in a primary warning state, a large cavity of the driving oil cylinder 11 is connected with a system oil return T, a hydraulic oil source P acts on a small cavity of the driving oil cylinder 11 through the first reversing valve 3, a cylinder rod of the driving oil cylinder 11 retracts, and a first component is driven to close; when the primary alarm state is relieved, the small cavity of the driving oil cylinder 11 is connected with the system oil return T, the hydraulic oil source P acts on the large cavity of the driving oil cylinder 11 through the first reversing valve 23, and the cylinder rod of the driving oil cylinder 11 extends to drive the first component to be opened.

Further optionally, in one embodiment, the first reversing valve 23 is a three-position four-way electric proportional reversing valve, and the host computer can be Y-shaped. When the early warning module is in a primary warning state or the primary warning state is released, the hydraulic control system sends a control signal to the first reversing valve 23, and the first reversing valve controls the cylinder rod of the driving oil cylinder 11 to perform telescopic motion so as to drive the first component to close or open.

Further optionally, in one embodiment, the first direction valve 23 is a three-position four-way electromagnetic direction valve, and the host computer can be Y-shaped.

Further preferably, in one embodiment, the second direction valve 27 is a manual direction valve.

The manual reversing valve is adopted, so that the false alarm rate can be reduced, the safety and the reliability are further improved, the separation operation of the emergency separation device needs to be manually started after manual confirmation, and unnecessary loss caused by the fact that a full-automatic system automatically triggers the separation operation of the emergency separation device when false alarm occurs can be avoided; the separation accident caused by the misoperation can be avoided.

Here, the second directional control valve 27 may also be a solenoid directional control valve, but its false alarm rate may be relatively high, see the above analysis.

Further alternatively, in one of the embodiments, the second direction valve 27 is a two-position two-way manual direction valve, and when the emergency release device is closed for releasing operation, the two-position two-way manual direction valve is in a one-way communication working position, and hydraulic pressure oil can only flow out from the large cavity of the release cylinder 10, and is stopped when the emergency release device is in a reverse direction.

The working position is in one-way conduction, so that the emergency release device can not generate a release accident due to misoperation when the loading and unloading arm is in normal operation.

Further, in one of the embodiments, the third direction valve 28 is used for controlling the cylinder rod of the driving cylinder 11 to perform telescopic movement, driving the first component to close, and ensuring that the driving cylinder 11 keeps the working position unchanged, and is specifically implemented as: the third reversing valve 28 is arranged between the large cavity of the driving oil cylinder 11 and the system return oil T, when the emergency release device executes primary release operation, the system return oil T is communicated with the large cavity of the driving oil cylinder 11 through the third reversing valve 28, and the cylinder rod of the driving oil cylinder 11 retracts to drive the first component to close; when the first-stage separation operation of the emergency separation device is closed, the system return oil T is isolated from the large cavity of the driving oil cylinder 11 through the third reversing valve 28.

Further alternatively, in one of the embodiments, the third direction valve 28 is a hydraulic control direction valve, which controls the oil port K to communicate with the large-cavity hydraulic circuit of the disengagement cylinder 10.

Further alternatively, in one embodiment, a solenoid directional valve may be used in the third directional valve 28, and the emergency device may be used to disengage the operation control signal.

Further alternatively, in one embodiment, the third direction valve 28 is a two-position two-way electromagnetic direction valve.

Further, in one embodiment, the fourth direction valve 29 is used for controlling the cylinder rod of the disengagement cylinder 10 to perform telescopic movement, driving the first component and the second component to close and disengage the two components, and controlling the cylinder rod of the disengagement cylinder 10 to return to the initial state, and is specifically implemented as follows: when the secondary separation operation is executed on the basis of the primary separation operation, the pressure oil source P acts on the large cavity of the separation oil cylinder 10 through the fourth reversing valve 29 and the second reversing valve 27, the cylinder rod of the separation oil cylinder 10 extends out, and the first component, the second component and the two components are driven to be closed and separated; when the emergency release device secondary release operation is finished or closed, the pressure oil source P acts on the small cavity of the release cylinder 10 through the fourth direction valve 29, and the cylinder rod of the release cylinder 10 performs a retracting movement.

Here, the extension movement of the rod out of the cylinder 10, driving the first part closed, can be realized by: if the first component is not completely closed by the rod of the driving oil cylinder 11, the rod of the disengaging oil cylinder 10 drives the cam mechanism of the first component to further retract the rod of the driving oil cylinder 11, so that the first component is completely closed.

Here, the extension movement of the rod out of the cylinder 10, driving the second part closed, may be implemented by: the rod of the disengagement cylinder 10 drives the second part closed by means of a linkage.

Here, the extension movement of the rod of the disengagement cylinder 10 may be implemented by driving the two parts to be separated: the rod of the disengagement cylinder 10 is driven by a linkage to open the device connecting the two parts, effecting separation of the two parts, the first part remaining on the loading arm and the second part remaining on the vessel.

By adopting the scheme of the embodiment, when the emergency separation device is separated, the first component and the second component in the emergency separation device can be closed at the same time and separated from each other, and the cylinder rod separated from the oil cylinder after the emergency separation retracts under the action of pressure oil, so that the interference generated during the separation is avoided; the driving oil cylinder and the separating oil cylinder mechanism have a locking relation, namely before the first part and the second part are not closed, a separating oil cylinder rod cannot extend out to drive the two parts to be separated, and the malfunction of the separating oil cylinder is avoided on the mechanical structure.

Further alternatively, in one of the embodiments, the fourth direction valve 29 is a two-position four-way electromagnetic direction valve.

Further, in one embodiment, with reference to fig. 2 to 5, the emergency release device includes a low-temperature upper ball valve 1, a low-temperature lower ball valve 2, and a valve hoop 5;

a disconnecting flange sealing ring 3 is arranged between the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2, the low-temperature upper ball valve 1 is arranged on a loading and unloading arm for an LNG ship, and the lower ball valve 2 is arranged on an LNG receiving station; the low-temperature upper ball valve 1 is fixed with an anchor ear support 4, one ends of two valve anchor ears 5 are connected with the anchor ear support 4 through a rotating shaft, the two valve anchor ears 5 clamp a broken flange sealing ring 3 between the two ball valves, and the other ends of the two valve anchor ears 5 are connected through a clamping rod 6; one end of the clamping rod 6 is connected with one valve hoop 5 through a rotating shaft, and the other end of the clamping rod is inserted into a bottom slot of the other valve hoop 5, is fixed through a clamping nut 7 and is further fastened through a locking nut 8; a driving fixing frame 12 is fixed on the low-temperature upper ball valve 1, and the separation oil cylinder 10 and the driving oil cylinder 11 are both fixed on the driving fixing frame 12; an upper push rod 13 is arranged on the disengaging oil cylinder 10, and a lower push rod 14 is arranged at the lower part of the upper push rod 13; the back parts of the upper push rod 13 and the lower push rod 14 are fixedly connected with a push rod 13-1; the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2 are respectively provided with a rotary rocker 17; the two rotary rockers 17 are respectively connected with the valve core rotating shafts 15 of the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2; the driving oil cylinder 11 is connected with one end of an upper end rotary rocker 17 through a rotating shaft; the other end of the upper end rotary rocker 17 is contacted with the lower end of the upper end push rod 13-1; the lower end rotary rocker 17 is contacted with the lower end of the lower end push rod 13-1; a push block 18 is arranged between the upper push rod 13 and the lower push rod 14, and the push block 18 is used for pushing the clamping rod 6 when the driving oil cylinder 11 descends. The upper end push rod 13-1 is in contact connection with the upper end rotary rocker 17 to form a space for avoiding position, when the driving oil cylinder 11 drives the upper end rotary rocker 17 to rotate, the other end of the upper end rotary rocker 17 can freely rotate downwards at the lower end of the upper end push rod 13-1, and cannot interfere with the upper push rod 13. When the disengaging cylinder 10 goes down, the upper push rod 13 can push the upper rotary rocker 17 to rotate through the upper push rod 13-1.

The push block 18 can be fixedly connected with the upper push rod 13 and can also be fixedly connected with the lower push rod 14; when the push rod is fixedly connected with the upper push rod 13, the lower end of the push block 18 is in contact connection with the upper end of the lower push rod 14, and when the push block is fixedly connected with the lower push rod 14, the upper end of the push block 18 is in contact connection with the upper push rod 13.

Further, in one embodiment, the emergency release apparatus further includes an upper valve position sensor, a lower valve position sensor and a release signal sensor, the upper valve position sensor is mounted on the rotary rocker 17 at the upper end for individually detecting the on-off state of the low temperature upper ball valve 1, and the detection is realized by mounting induction electromagnetic valves at two rotation limit positions; the lower valve position sensor is arranged on the driving fixing frame 12, and the position of the push rod is detected by installing the induction electromagnetic valve at the limit position of the push rod, so that the on-off state of the ball valve 2 at low temperature is detected. The separation signal sensor is arranged on the inner side of the other end of the valve hoop 5 and used for detecting the opening and closing states of the two hoop valves 5 to realize the feedback of the separation signal;

further, in one embodiment, the clamping bar 6 is provided with a shear pin 9, the shear pin 9 is inserted into the clamping bar 6 and the other valve hoop 5, the shear pin is used as a dropping-proof part of the clamping bar 6 to prevent the clamping bar 6 from dropping in a normal operation stage, and the shear pin 9 can be cut off by pushing the clamping bar 6 through the push block 18 during a separation operation.

Further, in one embodiment, a disconnection stud 16 is further arranged between the lower rotary rocker 17 and the valve body of the low-temperature ball valve 2, the disconnection stud 16 is used for limiting the position of the low-temperature ball valve 2 to prevent misoperation, and when the low-temperature ball valve 2 is opened in an emergency state, the lower rotary rocker 17 rotates to cut off the disconnection stud 16.

As a specific example, with respect to the emergency release apparatus shown in fig. 2, there is provided an emergency release control apparatus as shown in fig. 6, including:

one-way valve 21: the check valve 21 is installed at an inlet of a hydraulic oil source of the hydraulic control system, and has a one-way stopping function, and external hydraulic oil P supplies oil to the hydraulic control system of the emergency release device through the check valve 21, and is stopped when the hydraulic control system is reversed. A part of the external hydraulic oil P acts on the port P of the electromagnetic directional valve to stand by, and a part of the external hydraulic oil P supplies oil to the accumulator 22. When the external hydraulic oil P is not supplied, the pressure oil of the energy accumulator 22 is ensured not to leak due to the one-way stop function of the one-way valve, and the port P of the electromagnetic directional valve is always kept with the pressure oil;

the accumulator 22: the accumulator 22 serves as an emergency power source and has a function of storing hydraulic pressure oil. When the loading arm normally works, a part of pressure oil P in the hydraulic system is supplied to the energy accumulator 22 to be used as an emergency power source, so that when the hydraulic oil source P is lacked, the hydraulic control system still has the emergency power source to ensure that the hydraulic control system is emergently separated from the hydraulic system to work reliably;

three-position four-way electric proportional reversing valve 23: the three-position four-way electro-proportional directional valve 23 is a hydraulic control element of the drive cylinder 11 in the emergency release device. As shown in fig. 6, the hydraulic pressure oil source acts on the P port of the three-position four-way electric proportional directional valve 23, the spool of the three-position four-way electric proportional directional valve is in the neutral position, at this time, the A, B port of the electromagnetic valve is unloaded, and the drive cylinder 11 remains in the original position without action. When the electromagnet on the left side of the three-position four-way electric proportional reversing valve 23 is electrified and the valve core is in the left position, the hydraulic oil P acts on the large cavity of the driving oil cylinder 11, the cylinder rod of the driving oil cylinder 11 does extension movement, and the upper ball valve of the emergency release device is driven to be opened. When the electromagnet on the right side of the three-position four-way electric proportional reversing valve 23 is electrified and the valve core is in the right position, the hydraulic oil P acts on the small cavity of the driving oil cylinder 11, the cylinder rod of the driving oil cylinder 11 makes retraction movement, and the upper ball valve of the emergency release device is driven to close.

Bidirectional balanced valve 24: the two-way balance valve 24 is arranged between the three-position four-way electric proportional reversing valve 23 and the large and small cavity hydraulic circuits of the driving oil cylinder 11. When the three-position four-way electric proportional reversing valve 23 does not act, namely the valve core is in a middle unloading state, the two-way balance valve 24 can drive the hydraulic cylinder large and small cavity hydraulic circuits to be locked, and the upper ball valve of the emergency release device can be reliably kept in the original working state. When the three-position four-way electric proportional reversing valve 23 is in a working position, the two-way balance valve 24 can automatically adjust the opening of the valve core, keep the motion process of the driving oil cylinder 11 stable and impact-free, and effectively relieve the damage to structural members caused by the impact of liquid when the ball valve is suddenly closed or opened when a loading and unloading arm pipeline conveys liquid.

The driving oil cylinder 11: the driving oil cylinder 11 is a hydraulic power executing mechanism, and when a hydraulic control system sends a control signal, the opening or closing of a ball valve on the emergency release device is realized through the telescopic motion of a cylinder rod of the driving oil cylinder 11.

Disengaging from the oil cylinder 10: the disengagement cylinder 10 is a hydraulic power actuator, which mainly realizes the closing of the ball valve of the emergency disengagement device and the disengagement of the upper and lower ball valves. When the loading arm normally works, as shown in fig. 6, the small cavity of the disengagement cylinder 10 is communicated with the hydraulic oil source P, the large cavity is communicated with the return oil T, and the rod of the disengagement cylinder 10 is in a retraction state. The emergency release device will only initiate the release action when the large chamber of the release cylinder 10 is filled with hydraulic pressure oil.

The direction change valve 27: preferably, the reversing valve 27 is a manual reversing valve, which can reduce the false alarm rate and further improve the safety and reliability, and the separation operation of the emergency separation device needs to be manually started after manual confirmation, so that unnecessary loss caused by the fact that a full-automatic system automatically triggers the separation operation of the emergency separation device when a false alarm occurs can be avoided; the separation accident caused by the misoperation can be avoided. The reversing valve 27 may also be a solenoid reversing valve, but its false alarm rate may be relatively high.

The manual directional valve 27 is a two-position two-way manual directional valve with friction positioning, and in the position shown in fig. 6, the valve core of the manual directional valve 27 is in the left position, and because the valve core in the left position has a one-way conduction function, hydraulic pressure oil can only flow to the port a from the port a' through the manual directional valve 27, and is stopped when the hydraulic pressure oil is in the reverse direction. This ensures that the emergency release device will not malfunction and cause a release accident when the loading and unloading arm is in normal operation. When the ship loading and unloading arm is in butt joint with a ship and an emergency occurs, the handle of the manual reversing valve 27 is pushed, the valve core of the manual reversing valve 27 is switched to the right position to work, at the moment, the port A' of the manual reversing valve 27 is freely communicated with the port A, the function of the emergency separation device in the separation oil cylinder 10 is started, and the separation operation of the emergency separation device can be realized.

Hydraulic control directional control valve 28: the hydraulic control reversing valve 28 is installed between the large cavity of the driving oil cylinder 11 and the system oil return T, and the control oil port K thereof is connected with the large cavity loop of the disengaging oil cylinder 10. In the state shown in fig. 6, the spool of the pilot operated directional control valve 28 is in the left position, the oil ports 1 and 2 are cut off, and the large-cavity oil path of the driving oil cylinder 11 is in the cut-off state, at this time, the driving oil cylinder 11 can keep the working position unchanged. When the emergency separation action needs to be realized, the pressure oil acts on the large cavity of the oil cylinder 10, the pressure oil also acts on the hydraulic control port K of the hydraulic control reversing valve 8 at the same time, the valve core of the hydraulic control reversing valve 28 is pushed to be reversed to the right position, and at the moment, the large cavity oil circuit of the driving oil cylinder 11 is communicated with the oil return loop T through the ports 1 and 2 of the hydraulic control reversing valve. The cylinder rod separated from the oil cylinder 10 extends out, the cylinder rod of the driving oil cylinder 11 retracts, and the upper ball valve and the lower ball valve are closed. The upper ball valve and the lower ball valve are driven to be closed, the hoops of the upper ball valve and the lower ball valve are opened, the upper ball valve and the lower ball valve in the emergency separation device are separated, and therefore the loading arm and the unloading arm are separated from a ship.

Two-position four-way electromagnetic directional valve 29: the two-position four-way electromagnetic directional valve 29 mainly controls the movement of the disengagement cylinder 10 in the hydraulic control system. When the loading arm normally works, the two-position four-way electromagnetic directional valve 29 is de-energized, and is in the working state (valve core right position) shown in fig. 6, the pressure oil source P acts on the small cavity of the disengaging oil cylinder 10 through the two-position four-way electromagnetic directional valve 29, and the cylinder rod of the disengaging oil cylinder 10 is in the retracting state. When the loading arm needs to be separated emergently, the two-position four-way electromagnetic directional valve 29 is electrified, the valve core is in the left position, at the moment, the pressure oil source P acts on the large cavity of the separation oil cylinder 10 through the two-position four-way electromagnetic directional valve 29, the cylinder rod of the separation oil cylinder 10 extends out, and the closing and separating actions of the ball valve of the emergency separation device are achieved.

The working principle of this example is as follows:

the hydraulic oil source P provides a hydraulic power source for the hydraulic control system of the emergency release device through the check valve 21. The pressure oil source P passes through the one-way valve 21 and then acts on the energy accumulator 22, the three-position four-way electric proportional reversing valve 23 and the P port of the two-position four-way electromagnetic reversing valve 29 respectively, and due to the one-way stopping function of the one-way valve 21, the energy accumulator 2 is filled with pressure oil all the time, so that an emergency power source can be provided for the emergency release device, and a hydraulic actuating mechanism in the emergency release device is driven to move rapidly under the emergency release condition. When the loading arm for the ship normally works, the valve core of the three-position four-way electric proportional reversing valve 23 is in the middle position, the driving oil cylinder 11 does not act, and the original working state is kept. The hydraulic pressure oil source acts on the small cavity of the disengaging oil cylinder 10 through the right position of the two-position four-way electromagnetic directional valve 29, so that the cylinder rod of the disengaging oil cylinder 10 keeps a retracting state. When the loading and unloading arm for the ship is in ｃA primary alarm state, the right electromagnet of the three-position four-way electric proportional reversing valve 23 is electrified, the valve core works in the right position, pressure oil enters the small cavity of the driving oil cylinder 11 through the P-A of the three-position four-way electric proportional reversing valve 23 and the left channel of the bidirectional balance valve 24, and under the action of hydraulic pressure oil, the cylinder rod of the driving oil cylinder 11 retracts to drive the upper ball valve of the emergency release device to be closed. If the primary alarm state of the marine loading and unloading arm is released, the left electromagnet of the three-position four-way electric proportional reversing valve 23 is electrified, the valve core works in the left position, hydraulic pressure oil enters the large cavity of the driving oil cylinder 11 through the P-B of the three-position four-way electric proportional reversing valve 23 and the right channel of the bidirectional balance valve 24, the cylinder rod of the driving oil cylinder 11 extends out under the action of the hydraulic oil, the upper ball valve of the emergency release device is driven to be opened, and the marine loading and unloading arm returns to the normal working state. If the alarm state of the marine loading and unloading arm is not released, the marine loading and unloading arm enters a secondary alarm state, and the marine loading and unloading arm needs to enter an emergency release state, the electromagnet of the two-position four-way electromagnetic directional valve 29 is electrified, the valve core is in the left position to work, after hydraulic pressure oil passes through the P-B of the two-position four-way electromagnetic directional valve 29, one part of the hydraulic pressure oil acts on a control port K of the hydraulic control directional valve 28, the valve core of the hydraulic control directional valve 28 is reversed to the right position to work, and the large cavity of the driving oil cylinder 11 is communicated; and a part of the oil passes through A-A' of the manual reversing valve 27 (at the moment, the manual reversing valve 27 is in a right working condition of figure 6), acts on the large cavity of the disengaging oil cylinder 10, and under the action of hydraulic pressure oil, a cylinder rod of the disengaging oil cylinder 10 extends out to drive an upper ball valve and a lower ball valve of the emergency disengaging device to be closed, and a valve hoop 5 between the upper ball valve and the lower ball valve is opened, so that the upper ball valve and the lower ball valve of the emergency disengaging device are separated (the upper ball valve part is remained on a loading and unloading arm, and the lower ball valve part is remained on a ship). After the emergency separation is completed, the electromagnet of the two-position four-way electromagnetic directional valve 29 is powered off, and the cylinder rod of the separation oil cylinder 10 automatically retracts under the action of pressure oil, so that the interference generated during the separation is avoided. Therefore, the emergency separation of the loading and unloading arm for the ship and the ship is realized, and the occurrence of dangerous situations such as damage of the loading and unloading arm is avoided.

Because each joint of the ship loading and unloading arm is provided with the encoder, and the encoder and the hydraulic system are both connected with the PLC processor, the working area of the loading and unloading arm can be monitored in real time, alarm processing is carried out according to whether the working area of the loading and unloading arm exceeds a set station range, the work of the hydraulic system is controlled according to the alarm level, and different interlocking actions of the two oil cylinders are realized;

fire alarm detection equipment such as carbon dioxide and a temperature sensor is arranged on an LNG ship or an LNG receiving station, and a detection signal is sent to a PLC processor, so that emergency situations such as fire can be detected in real time; the working posture of the loading and unloading arm is changed due to external water expansion, water falling, drifting, cable disconnection, overweight, external impact and the like of the LNG ship, so that the loading and unloading arm is in a non-safe working area, the working range of the loading and unloading arm is divided into different working areas, and the safe working area exceeds the safe working area but belongs to an acceptable working area and a dangerous working area.

When the loading and unloading arm is in a parking state and the loading and unloading arm is in a normal loading and unloading working state, the valves of the upper ball valve and the lower ball valve are in an opening state; when a wharf system control signal feeds back an alarm signal or the loading and unloading arm works beyond the range, the PLC processor realizes the identification of alarm levels through logic judgment, the alarm identification is divided into pre-alarm, primary alarm and secondary alarm, and sends signals to an alarm device according to the alarm levels to generate different alarm prompts (such as buzzers with different sounds or alarm lamps with different colors);

when the loading arm reaches the boundary of a safe area, the PLC processor judges that the loading arm is pre-alarming and gives an alarm to remind ship shore workers of paying close attention to alarming dynamics, the PLC processor controls a hydraulic station of a hydraulic system to start, and the hydraulic station is in a working state;

when the loading and unloading arm reaches the boundary of the acceptable working area, the PLC processor judges that the loading and unloading arm is in a first-level alarm state, sends out a strong alarm to remind ship shore workers to pay attention, and the PLC processor controls the hydraulic system to drive the driving oil cylinder 11 to enable the upper end rotary rocker 17 to rotate, so that the valve core of the low-temperature upper ball valve 1 is driven to rotate, the low-temperature upper ball valve 1 is closed, the upper valve position sensor feeds back to the in-place state, the driving oil cylinder 11 stops, and the state can be manually judged and separated. When the loading arm returns to a safe area or an acceptable working area, the driving oil cylinder 11 drives the upper end rotary rocker 17 to rotate reversely, so as to drive the valve core of the low-temperature upper ball valve 1 to rotate reversely, open the low-temperature upper ball valve 1, feed back the upper valve position sensor to the in-place state, drive the oil cylinder 11 to stop, and restore the normal working state. When the first-level alarm enters the second-level alarm, the PLC processes and controls the hydraulic system to drive the separation oil cylinder 10 to work, so that the lower end rotary rocker 17 rotates to close the low-temperature lower ball valve 2, and pushes the clamping rod 6 to separate the two valve hoops 5, thereby realizing the separation operation of the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2. When the loading arm exceeds the boundary of the acceptable working area and enters a dangerous working area or an emergency occurs, the PLC processor directly judges that the loading arm is a secondary alarm, a stronger alarm is sent out, automatic separation control is started, the PLC processor controls the hydraulic system to drive the separation oil cylinder 10 and the driving oil cylinder 11 to work simultaneously, the upper rotary rocker 17 and the lower rotary rocker 17 rotate simultaneously, the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2 are closed simultaneously, the clamping rod 6 is pushed open to separate the two valve hoops 5, and separation operation of the low-temperature upper ball valve 1 and the low-temperature lower ball valve 2 is achieved.

Different response working conditions are realized through different alarm states, and when the alarm is in a pre-alarm state and a primary alarm state, the change can be improved according to the states, so that the control system returns to the working state, the reversible operability of the control system is improved, the working efficiency is improved, and unnecessary economic loss is avoided; the upper ball valve and the lower ball valve are closed and the opening of the valve hoop is realized to realize the separation operation of the emergency separation device during the secondary alarm, so that the system is controlled step by step, the hierarchical management is realized, the purpose of safety and controllability is achieved, unnecessary economic loss of the wharf in normal operation is avoided, and the safety and the working efficiency of the wharf are greatly improved.

In conclusion, the emergency separation system can realize the rapid, safe and reliable emergency separation of the LNG tanker and the receiving station pipeline according to different working condition requirements, simultaneously meet the working response of different emergency conditions and ensure the safety of the operation process of the loading and unloading arm for the ship.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.