阅读说明：本技术 具备以液压执行器运转的极低温阀的lng加注监控系统 (LNG filling monitoring system with extremely low temperature valve operated by hydraulic actuator ) 是由 陈宗根 于 2019-11-12 设计创作，主要内容包括：本发明涉及一种具备以液压执行器运转的极低温阀的LNG加注监控系统,借助于能拆卸地连接第一罐与第二罐之间的加注模块,从配备于第一装置的极低温用第一罐向配备于独立于第一装置的第二装置的极低温用第二罐加注LNG货物,且监控模块实时读取加注模块运转导致的极低温阀体的运转状态和LNG货物的温度和压力及流量信息,与预先设置值进行比较分析,从而使得可以在加注诸如LNG的液体货物时,从实时收集包括极低温阀的运转状态的温度和压力及流量等信息的大数据,预先防止事故,实现系统整体的预见性维护。(The present invention relates to an LNG filling monitoring system having a cryogenic valve operated by a hydraulic actuator, wherein LNG cargo is filled from a first cryogenic tank provided in a first device to a second cryogenic tank provided in a second device independent of the first device by means of a filling module detachably connected between the first tank and the second tank, and the monitoring module reads an operating state of the cryogenic valve body and temperature, pressure, and flow rate information of the LNG cargo in real time, which are caused by the operation of the filling module, and compares the information with preset values to analyze the information, so that when liquid cargo such as LNG is filled, large data including information such as the temperature, pressure, and flow rate of the operating state of the cryogenic valve can be collected in real time, thereby preventing an accident in advance and realizing predictive maintenance of the entire system.)

1. An LNG filling monitoring system having a very low temperature valve operated by a hydraulic actuator, comprising:

a first cryogenic tank provided in the first installation for containing LNG cargo;

a second cryogenic tank provided in a second device independent of the first device;

a filling module that is disposed between the first tank and the second tank, and that includes a main connection pipe that is detachably coupled to the first tank and the second tank, an auxiliary connection pipe that branches off from the main connection pipe and forms a circulation path, and a plurality of cryogenic valve bodies that are attached to the main connection pipe and the auxiliary connection pipe so as to be operable by hydraulic pressure, and that allow or block a flow of the LNG cargo from the first tank to a second tank side so as to fill the LNG cargo contained in the first tank to the second tank; and

and a monitoring module electrically connected to the plurality of cryogenic valve bodies, supplying or releasing hydraulic pressure required for operation of the cryogenic valve bodies, electrically controlling and monitoring opening and closing of the plurality of cryogenic valve bodies, reading temperature, pressure, and flow rate information of the LNG cargo collected in real time during filling of the LNG cargo from the first tank to the second tank side from the filling module, and comparing and analyzing the temperature, pressure, and flow rate information with preset values.

2. An LNG filling monitoring system with a very low temperature valve operated with a hydraulic actuator according to claim 1,

the filling module comprises:

a module body;

a first filling coupler provided on one side of the module body and detachably connected to the pipe of the first tank;

a second filling coupling provided on the other side of the module body, detachably connected to the pipe of the second tank, and connected to both ends of the main connection pipe together with the first filling coupling;

a temperature sensor attached to an inlet side of the main connection pipe connected to the first filling coupling, the temperature sensor detecting a temperature of the LNG cargo flowing from the first tank in real time and transmitting the detected temperature to the monitoring module;

a first pressure sensor attached to an inlet side of the main connection pipe connected to the first filling coupling, the first pressure sensor detecting pressure of the LNG cargo flowing from the first tank in real time and transmitting the detected pressure to the monitoring module;

a second pressure sensor attached to an outlet side of the main connection pipe connected to the second filling coupling, the second pressure sensor detecting in real time a pressure of the LNG cargo flowing from the first tank into the second tank and transmitting the pressure to the monitoring module;

and a flow rate sensor attached to an outlet side of the main connection pipe connected to the second filling coupling, the flow rate sensor detecting in real time a flow rate of the LNG cargo flowing from the first tank into the second tank and transmitting the flow rate to the monitoring module.

3. An LNG filling monitoring system with a very low temperature valve operated with a hydraulic actuator according to claim 1,

the monitoring module includes:

a signal transmission unit that transmits an electric signal and a hydraulic signal for opening and closing the plurality of cryogenic valve bodies;

and a control unit electrically connected to the filling module and the signal transmission unit, for repeatedly comparing and analyzing the temperature, pressure and flow rate information of the LNG cargo collected from the filling module in real time, the opening/closing power and torque caused by the repeated opening/closing operation of each of the plurality of cryogenic valve bodies, and the flow rate and pressure information of the LNG cargo, thereby deriving an optimal setting value required for the stable opening/closing operation of the plurality of cryogenic valve bodies, and storing and correcting the optimal setting value.

4. An LNG filling monitoring system with a very low temperature valve operated with a hydraulic actuator according to claim 1,

the very low temperature valve body includes:

a valve body that is attached to the main connection pipe or the auxiliary connection pipe, and that includes a first port through which the LNG cargo flows from a first tank side, a second port through which the LNG cargo is discharged to a second tank side, a first communication port that is formed between the first port and the second port and that penetrates an upper portion of the valve body, and a second communication port that is formed between the first port and the second port and that penetrates a lower portion of the valve body so as to face the first communication port;

a first valve cover detachably coupled to an upper side of the valve body so as to seal the first communication port;

a second valve cover detachably coupled to a lower portion side of the valve body so as to close the second communication port;

a first yoke formed to protrude from an upper surface of the first bonnet along an edge of a first elevation hole penetrating through a center portion of the first bonnet;

a valve rod which penetrates the first lifting hole, has a lower end part accommodated in the inner space of the valve body, and has a lower outer circumferential surface supported by the first yoke;

a protection tube having a lower end portion to be placed and fixed on a first stepped portion formed in a stepped manner on an upper side of an outer peripheral surface of the first yoke, the protection tube accommodating the valve rod;

a second yoke having a second staggered portion formed in a staggered manner so as to be fixed to an inner peripheral surface of an upper end portion of the protection pipe and to support an outer peripheral surface of an upper portion of the valve stem;

a lower flange formed to extend from an upper portion of the second yoke, and having a second lift hole formed in a central portion thereof, the second lift hole having the same diameter as the first lift hole and through which the valve stem passes;

a drive transmission system including a hydraulic motor and a gear box, wherein the hydraulic motor includes a drive shaft that receives and transmits a drive force from a hydraulic source and rotates in forward and reverse directions, and the gear box has a bevel gear that is connected to the drive shaft and transmits the drive force to the valve stem arranged in a direction orthogonal to the drive shaft; and

and a valve disc portion attached to a lower end portion of the valve stem, ascending and descending in conjunction with the valve stem in accordance with the driving force transmitted from the drive transmission system, and allowing the flow of the LNG cargo from the first tank to the second tank side in accordance with contact with a lower surface of the first valve cap, or blocking the flow of the LNG cargo from the first tank to the second tank side in accordance with separation from the lower surface of the first valve cap.

Technical Field

The present invention relates to an LNG (liquefied natural gas) filling monitoring system including a cryogenic valve operated by a hydraulic actuator, and more particularly, to an LNG filling monitoring system including a cryogenic valve operated by a hydraulic actuator, which is capable of collecting, in real time, large data of temperature, pressure, flow rate, and the like including an operation state of the cryogenic valve when filling a liquid cargo such as LNG, thereby preventing an accident in advance and realizing predictive maintenance of the entire system.

Background

Filling (bunkering) mainly means storing and transporting marine fuel oil called bunker oil.

More recently, as LNG usage has increased, LNG fueling has also been transferred and supplied to the filling.

In the fuel supply of a ship, a large amount of fuel may be temporarily stored on a barge or other container in order to be transported from the shore to the ship as fuel.

Thus, the fuel supply may be made directly from a terminal or other port facility, or may be made by receiving fuel delivered by a barge or other fuel supply vessel.

In the case of filling LNG, even with a storage vessel capable of maintaining an extremely low temperature state of-162 ℃ or less, LNG is continuously naturally vaporized inside the storage vessel, and thus a considerable amount of BOG (boil-off gas) is generated.

If the amount of BOG in the storage container is too large, the pressure in the storage container rises, and the storage container cannot withstand the internal pressure, so that there is a risk of explosion, and therefore, the BOG is discharged, liquefied, and stored again.

As a technique invented from the above-mentioned viewpoint, for example, the "gas filling line and the gas filling system including the same" (hereinafter referred to as a related art) of the patent publication No. 10-2017-0091378 and the like can be mentioned.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an LNG refueling monitoring system including a cryogenic valve operated by a hydraulic actuator, which is capable of collecting, in real time, large data including temperature, pressure, and flow rate information including an operating state of the cryogenic valve when a liquid such as LNG is being refilled, thereby preventing an accident in advance and realizing predictive maintenance of the entire system.

In order to achieve the above object, the present invention may provide an LNG refueling monitoring system including a cryogenic valve operated by a hydraulic actuator, including: a first cryogenic tank provided in a first installation and containing LNG cargo; a second tank for very low temperature provided in a second device independent of the first device; a filling module that is disposed between the first tank and the second tank, and that includes a main connection pipe detachably coupled to each of the first tank and the second tank, an auxiliary connection pipe that branches off from the main connection pipe and forms a circulation path, and a plurality of cryogenic valve bodies that are attached to the main connection pipe and the auxiliary connection pipe so as to be operable by hydraulic pressure, and that allow or block a flow of the LNG cargo from the first tank toward the second tank so as to fill the second tank with the LNG cargo stored in the first tank; and a monitoring module electrically connected to the plurality of cryogenic valve bodies, supplying or releasing hydraulic pressure required for operation of the cryogenic valve bodies, electrically controlling and monitoring opening and closing of the plurality of cryogenic valve bodies, and reading temperature, pressure, and flow rate information of the LNG cargo collected in real time during filling of the LNG cargo from the first tank to the second tank side from the filling module, and comparing and analyzing the temperature, pressure, and flow rate information with preset values.

Wherein the filling module comprises: a module body; a first filling coupler which is provided on one side of the module body and detachably connected to the pipe of the first tank; a second filling coupling device which is provided on the other side of the module body, is detachably connected to the pipe of the second tank, and is connected to both ends of the main connection pipe together with the first filling coupling device; a temperature sensor attached to an inlet side of the main connection pipe connected to the first filling coupling, the temperature sensor detecting a temperature of the LNG cargo flowing from the first tank in real time and transmitting the detected temperature to the monitoring module; a first pressure sensor attached to an inlet side of the main connection pipe connected to the first filling coupling, the first pressure sensor detecting pressure of the LNG cargo flowing from the first tank in real time and transmitting the LNG cargo to the monitoring module; a second pressure sensor attached to an outlet side of the main connection pipe connected to the second filling coupling, the second pressure sensor detecting in real time a pressure of the LNG cargo flowing from the first tank into the second tank and transmitting the pressure to the monitoring module; and a flow rate sensor attached to an outlet side of the main connection pipe connected to the second filling coupling, the flow rate sensor detecting in real time a flow rate of the LNG cargo flowing from the first tank into the second tank and transmitting the flow rate to the monitoring module.

At this time, the monitoring module includes: a signal transmission unit that transmits an electric signal and a hydraulic signal for opening and closing the plurality of cryogenic valve bodies; and a control unit electrically connected to the filling module and the signal transmission unit, for repeatedly comparing and analyzing the temperature, pressure and flow rate information of the LNG cargo collected from the filling module in real time, the opening/closing power, torque (torque) and flow rate and pressure information of the LNG cargo caused by the repeated opening/closing operation of each of the plurality of cryogenic valve bodies, thereby deriving an optimal setting value required for the stable opening/closing operation of the plurality of cryogenic valve bodies, and storing and revising the optimal setting value.

In addition, the very low temperature valve body includes: a valve body that is attached to the main connection pipe or the auxiliary connection pipe, and that includes a first port through which the LNG cargo flows from the first tank side, a second port through which the LNG cargo is discharged to the second tank side, a first communication port that is formed between the first port and the second port and that penetrates the first port on the upper side, and a second communication port that is formed between the first port and the second port and that penetrates the second port on the lower side so as to face the first communication port; a first bonnet detachably coupled to an upper side of the valve body so as to seal the first communication port; a second bonnet detachably coupled to a lower portion side of the valve body so as to seal the second communication port; a first yoke formed to protrude from an upper surface of the first bonnet along an edge of a first elevation hole penetrating through a center portion of the first bonnet; a valve rod which penetrates the first lifting hole, has a lower end part accommodated in the inner space of the valve body, and has a lower outer circumferential surface supported by the first yoke; a protection tube having a lower end portion to be placed and fixed on a first stepped portion formed in a stepped manner on an upper side of an outer peripheral surface of the first yoke, the protection tube accommodating the valve stem; a second yoke having a second staggered portion formed in a staggered manner so as to be fixed to an inner peripheral surface of an upper end portion of the protection pipe and to support an outer peripheral surface of an upper portion of the valve stem; a lower flange formed to extend from an upper portion of the second yoke, and having a second lift hole formed in a central portion thereof, the second lift hole having a diameter equal to that of the first lift hole and through which the stem passes; a drive transmission system including a hydraulic motor including a drive shaft that receives a drive force from a hydraulic source and rotates in forward and reverse directions, and a gear box having a bevel gear that is connected to the drive shaft and transmits the drive force to the valve stem arranged in a direction orthogonal to the drive shaft; and a valve disc portion attached to a lower end portion of the valve stem, configured to move up and down in conjunction with the valve stem in accordance with the driving force transmitted from the drive transmission system, and configured to allow the flow of the LNG cargo from the first tank to the second tank side in accordance with contact with a lower surface of the first valve cap, or to block the flow of the LNG cargo from the first tank to the second tank side in accordance with separation from the lower surface of the first valve cap.

According to the present invention configured as described above, the following effects can be achieved.

First, the present invention makes it possible to easily fill LNG that is liquid cargo, by means of a filling module that is disposed between and detachably coupled to a first tank and a second tank.

In addition, the monitoring module of the present invention collects and compares the big data of the temperature, the pressure, the flow rate and the like including the operation state of the very low temperature valve in real time during the filling process, so as to prevent an accident in advance, realize the predictive maintenance of the whole system, and seek the high-efficiency operation and the operation of the filling system.

More importantly, the filling module and the monitoring module can be provided in a module form which is convenient to manage, transport, install and assemble, so that the filling monitoring module has the characteristics and advantages that the installation, construction and application of a system can be continuously realized in an emergency situation that filling needs to be quickly realized.

Drawings

Fig. 1 is a conceptual diagram showing the overall configuration of an LNG refueling monitoring system including a cryogenic valve operated by a hydraulic actuator according to an embodiment of the present invention

FIG. 2 is a conceptual diagram showing the overall configuration of an LNG refueling monitoring system having a very low temperature valve operated by a hydraulic actuator according to another embodiment of the present invention

FIG. 3 is a side cross-sectional conceptual view for examining the internal structure of a very low temperature valve body provided in a filling module as a main part of an LNG filling monitoring system having a very low temperature valve operated by a hydraulic actuator according to an embodiment of the present invention

FIG. 4 is a conceptual diagram showing an inner side cross-sectional view sequentially illustrating an operation process of a cryogenic valve body provided in a filling module which is a main part of an LNG filling monitoring system having a cryogenic valve operated by a hydraulic actuator according to an embodiment of the present invention

Reference numerals

110: first tank

120: second tank

200: filling module

201: main connecting pipe

202: auxiliary connection pipe

210: module body

211: first fill coupler

212: second fill coupler

221: temperature sensor

222: first pressure sensor

223: second pressure sensor

224: flow sensor

300: monitoring module

310: signal transmission part

311: valve cabinet

312: hydraulic power unit

320: setting control part

321: valve drive setter

322: control device

323: control console

400: extremely low temperature valve body

410: valve body

411: first port

412: second port

413: first communication port

414: second communicating port

415: first valve cover

415h, a step of: first lifting hole

415 k: first yoke

415 s: first split layer part

416: second valve cover

417: partition wall

417 c: intermediate wall

417 d: lower circulation space

417 ch: sheet hole

417 u: upper circulation space

420: valve rod

421: hanging piece

421 g: upper positioning groove

430: drive transmission system

431: hydraulic motor

432: gear box

440: valve disk part

441: dish cup

441 f: chamfered surface

441 g: lower positioning groove

442: dish cover

442 f: plugging flange

442 p: press fixing cylinder

443: accommodating tank

445: positioning ball

450: disc sheet

451: annular split level

452: protective cage

452h, a: flow hole

460: protective tube

470: second yoke

472: second split layer part

480: lower flange

481: connecting piece

482: second lifting hole

483: bushing

484: third yoke

485: support rod

486: annular mounting groove

490: upper flange

491: indicating dial

492: indicating instrument

L1: first virtual line

T: tank car

Detailed Description

The advantages, features and methods of accomplishing the same of the present invention will be apparent from the following detailed description of the embodiments taken in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, and may be embodied in various forms different from each other.

In the present specification, the present embodiments are provided to make the disclosure of the present invention more complete, and to fully inform the scope of the invention to those skilled in the art to which the present invention pertains.

Furthermore, the scope of the invention is only limited by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been described in detail in order to avoid obscuring the present invention.

In addition, like reference numerals refer to like elements throughout the specification, and terms used (referred to) in the specification are used for describing embodiments and are not intended to limit the present invention.

In the present specification, the singular forms also include the plural forms as long as they are not specifically mentioned in the sentence, and the presence or addition of one or more other constituent elements and actions is not excluded by "including (or including) the constituent elements and actions mentioned.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used as meanings commonly understood by one of ordinary skill in the art to which the present invention belongs.

In addition, generally used dictionary-defined terms, unless defined, should not be interpreted too much or excessively.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

For reference, fig. 1 is a conceptual diagram illustrating an overall configuration of an LNG refueling monitoring system including a cryogenic valve operated by a hydraulic actuator according to an embodiment of the present invention, and fig. 2 is a conceptual diagram illustrating an overall configuration of an LNG refueling monitoring system including a cryogenic valve operated by a hydraulic actuator according to an embodiment of the present invention.

Fig. 3 is a side sectional view for examining an internal structure of a cryogenic valve body 400 provided in a filling module 200 as a main part of an LNG filling monitoring system having a cryogenic valve operated by a hydraulic actuator according to an embodiment of the present invention.

Fig. 4 is a schematic diagram showing an internal cross-sectional view of an operation process of a cryogenic valve body 400 provided in a filling module 200 of a main part of an LNG filling monitoring system including a cryogenic valve operated by a hydraulic actuator according to an embodiment of the present invention.

For reference, the dotted lines shown in fig. 1 and 2 represent transmission paths of signals and data, and the dotted lines represent transmission paths of temperature and pressure and flow rate information detected in real time.

Although the dotted lines in fig. 1 and 2, which indicate the transmission paths of signals and data, are illustrated as transmitting signals to some valves, that is, only some of the plurality of cryogenic valve bodies 400, in the region of the filling module 200 indicated by the dotted line, it should be noted that signals are actually transmitted to all of the cryogenic valve bodies 400 in the filling module, but some of them are omitted for the convenience of understanding of the drawings.

In fig. 2, in the filling module 200, a line indicated by a thick solid line between the first filling coupler 211 and the second filling coupler 212 represents the main connection pipe 201, and a line indicated by a thin solid line represents the auxiliary connection pipe 202.

As shown in fig. 1 and 2, the present invention can be understood as an embodiment in which the filling module 200 connects the first tank 110 and the second tank 120 for filling, and the monitoring module 300 reads various information during filling in real time and compares the information.

First, the first tank 110 is a tank for very low temperature equipped at a first facility (not shown below) and containing LNG cargo.

Also, the second tank 120 is equipped at a second device (not shown below) independent of the first device and serves as a tank for very low temperature.

In another aspect, priming module 200 includes: a main connection pipe 201 disposed between the first tank 110 and the second tank 120, and detachably coupled to the first tank 110 and the second tank 120, respectively; the auxiliary connection pipe 202 (see fig. 2 below) branches off from the main connection pipe 201 to form a circulation path.

The filling module 200 includes a plurality of cryogenic valve bodies 400, and the cryogenic valve bodies 400 are attached to the main connection pipe 201 and the auxiliary connection pipe 202 so as to be operable by hydraulic pressure, and allow or block the flow of the LNG cargo from the first tank 110 to the second tank 120 side so as to fill the second tank 110 with the LNG cargo stored in the first tank 110.

The monitoring module 300 is electrically connected to the plurality of cryogenic valve bodies 400, supplies or releases hydraulic pressure required for the operation of the cryogenic valve bodies 400, and electrically controls and monitors the opening and closing of the plurality of cryogenic valve bodies 400.

Meanwhile, the monitoring module 300 is further equipped to read temperature and pressure and flow rate information of the LNG cargo, which is collected in real time during the process of filling the LNG cargo from the first tank 110 to the second tank 120 side, from the filling module 200, and compare and analyze the same with preset values.

The present invention can be applied to the above-described embodiments, and of course, can be applied to various embodiments as shown below.

First, the first and second apparatuses are assumed to be a tank car T for transporting a terrestrial LNG tank and a ship for filling, and may be an LNG tank and an LNG carrier provided in the tank car as shown in fig. 1.

Further, as shown in fig. 2, the first and second devices may be one LNG carrier and another LNG carrier, assuming that the ship is on shore for filling.

In addition, the first and second devices may be floating offshore structures or land structures, that is, filling between land LNG tanks and ships, in addition to the ships.

On the other hand, the filling module 200 may include: a module body 210; a first filling coupler 211 provided on one side of the module body 210 and detachably connected to the pipe of the first tank 110; and a second filling coupling 212 provided on the other side of the module body 210, detachably connected to the pipe of the second tank 120, and connected to both ends of the main connection pipe 201 together with the first filling coupling 211.

Such a module body 210 may be disposed on the first apparatus side or the second apparatus side, and the filling may be started after the installation.

On the other hand, the filling module 200 may include a temperature sensor 221 attached to an inlet side of the main connection pipe 201 connected to the first filling coupling 211, and the temperature sensor 221 may check the temperature of the LNG cargo flowing from the first tank 110 in real time and transmit the checked LNG cargo to the monitoring module 300, so that temperature information of the LNG cargo may be collected in real time at the time of filling by connection to the monitoring module 300, which will be described later.

The filling module 200 may further include a first pressure sensor 222 attached to an inlet side of the main connection pipe 201 connected to the first filling coupling 211, and configured to check the pressure of the LNG cargo flowing from the first tank 110 in real time and transmit the pressure to the monitoring module 300, so that inlet side pressure information of the LNG cargo can be collected in real time at the time of filling by being connected to the monitoring module 300, which will be described later.

The filling module 200 may further include a second pressure sensor 223 attached to an outlet side of the main connection pipe 201 connected to the second filling coupling 212, and configured to check in real time the pressure of the LNG cargo flowing from the first tank 110 into the second tank 120 and transmit the pressure to the monitoring module 300, so that outlet-side pressure information of the LNG cargo can be collected in real time at the time of filling by being connected to the monitoring module 300, which will be described later.

It is to be noted that the filling module 200 may be provided with a flow sensor 224 attached to the outlet side of the main connection pipe 201 connected to the second filling coupling 212, and the flow sensor 224 may check the flow rate of the LNG cargo flowing from the first tank 110 to the second tank 120 in real time and transmit the flow rate to the monitoring module 300 so that the flow rate information of the LNG cargo can be collected in real time at the time of filling by being connected to the monitoring module 300, which will be described later.

On the other hand, the monitoring module 300 may employ an embodiment including a signal transmission unit 310 that transmits an electrical signal and a hydraulic signal required for opening and closing to the plurality of cryogenic valve bodies 400, and a setting regulation unit 320 that electrically connects the filling module 200 and the signal transmission unit 310.

The setting regulation section 320 is configured to execute the following flow: the temperature, pressure and flow rate information of the LNG cargo collected in real time from the filling module 200, the opening and closing power, torque (torque), and flow rate and pressure information of the LNG cargo due to the repeated opening and closing operations of the plurality of cryogenic valve bodies 400 are repeatedly analyzed and compared, and optimal setting values required for the stable opening and closing operations of the plurality of cryogenic valve bodies 400 are derived, stored, and revised.

The signal transmitting part 310 may include: a valve cabinet 311 that can electrically operate the opening/closing degree of each of the plurality of cryogenic valve bodies 400; a hydraulic power unit 312 that supplies oil for generating driving force from a hydraulic pressure source (not shown below) to the hydraulic motor 431 with which each of the plurality of very low temperature valve bodies 400 is equipped.

In this case, the setting controller 320 may be an embodiment including a valve driving setter 321, a controller 322, and a console 323.

First, the valve driving setter 321 reads, from the filling module 200, temperature, pressure, and flow rate information of the LNG cargo, opening/closing power, torque (torque), and flow rate and pressure information of the LNG cargo, which are collected in real time, due to repeated opening/closing operations of the plurality of cryogenic valve bodies 400, each time the plurality of cryogenic valve bodies 400 are operated, and compares the read information with preset values.

The valve driving setter 321 collects data using a deep learning algorithm (deep learning algorithm) that senses a change in state of a portion exposed to an extremely low temperature environment, such as the valve body and the valve stem 420 of the extremely low temperature valve body 400, in real time, derives optimum setting values necessary for the plurality of extremely low temperature valve bodies 400 to stably perform an opening/closing operation, and stores and revises the optimum setting values.

Therefore, the controller 322 monitors the real-time operation of each of the plurality of very low temperature valve bodies 400 by the operation of the valve drive setter 321, and the console 323 executes the following process: connected to the signal transmission unit 310, the signal transmission unit transmits information to the plurality of cryogenic valve bodies 400 indicating whether the plurality of cryogenic valve bodies 400 are maintained in operation or stopped in operation, which is monitored by the controller 322.

On the other hand, if the cryogenic valve body 400 is examined with reference to fig. 3 and 4, the structure including the valve body 410, the first and second valve covers 415 and 416, the first yoke 415k, the valve stem 420, the drive transmission system 430, the valve disc portion 440, the protection pipe 460, the second yoke 470, and the lower flange 480 can be understood.

The valve body 410 includes: a first port 411 that is attached to the main connection pipe 201 or the auxiliary connection pipe 202 and into which LNG cargo flows from the first tank 110 side; and a second port 412 for discharging the LNG cargo to the second tank 120 side.

The valve body 410 may further include: a first communication port 413 formed to penetrate through the upper side between the first port 411 and the second port 412; and a second communication port 414 formed between the first port 411 and the second port 412 so as to penetrate downward and face the first communication port 413.

The first bonnet 415 is detachably coupled to an upper side of the valve body 410 to seal the first communication port 413, and the second bonnet 416 is detachably coupled to a lower side of the valve body 410 to seal the second communication port 414.

The first yoke 415k is formed to protrude from the upper surface of the first bonnet 415 along the edge of a first elevation hole 415h penetrating through the center portion of the first bonnet 415.

The valve rod 420 penetrates the first lift hole 415h, has a lower end portion housed in the internal space of the valve body 410, and has a lower outer circumferential surface supported by the first yoke 415 k.

The protection tube 460 includes a lower end portion fixed to a first stepped portion 415s formed in a stepped manner on the upper side of the outer peripheral surface of the first yoke 415k, and accommodates the valve stem 420.

The second yoke 470 includes a second stepped portion 472 formed in a stepped manner so as to be fixed to the inner circumferential surface of the upper end portion of the protection pipe 460 and support the outer circumferential surface of the upper portion of the valve stem 420.

The lower flange 480 is formed to extend toward the upper side of the second yoke 470, and a second elevation hole 482 having the same diameter as the first elevation hole 415h and through which the stem 420 passes is formed at the center portion.

The drive transmission train 430 includes: a hydraulic motor 431 including a drive shaft (not shown below) that receives a transmission drive force from a hydraulic source (not shown below) and rotates in the forward and reverse directions; the gear case 432 houses a bevel gear (not shown below) that is connected to the drive shaft and transmits a driving force to the valve stem 420 arranged in a direction orthogonal to the drive shaft.

The valve disk portion 440 is attached to the lower end portion of the valve rod 420, and moves up and down in conjunction with the valve rod 420 in accordance with the driving force transmitted from the drive transmission system 430.

That is, the valve disk portion 440 allows the flow of the LNG cargo from the first tank 110 to the second tank 120 side as shown in fig. 4(a) when coming into contact with the lower surface of the first valve cover 415, or cuts off the flow of the LNG cargo from the first tank 110 to the second tank 120 side as shown in fig. 4(b) when departing from the lower surface of the first valve cover 415.

The lower end of the valve stem 420 may further include a hooking piece 421 (see the enlarged view of the right lower end of fig. 3) having a larger width or diameter than the outer diameter of the lower end of the valve stem 420, so that the valve disc portion 440 can be securely fixed and coupled.

At this time, the hooking piece 421 is received in the receiving groove 443 formed in the disc cup 441 of the valve disc portion 440 and is pressed and fixed by the disc cover 442.

In this case, the disk cup 441 forms a housing groove 443 formed in an open-faced cup shape and capable of housing the hanging piece 421, and the disk cup 441 includes a chamfered surface 441f formed by cutting the outer peripheral surface of the lower end portion of the disk cup 441 in a downward inclined manner and provides a mounting surface on which the disk piece portion 450 described later is smoothly mounted.

Further, the disk cover 442 may be further provided so that the open upper surface of the disk cup 441 can be closed while the upper surface of the hanging piece 421 is pressed and fixed in a state where the hanging piece 421 is accommodated in the accommodation groove 443.

Such a structure of the tray cover 442 includes: a closing flange 442f through which the stem 420 penetrates at the center thereof and which is fixed to the open upper edge of the disk cup 441; and a pressing/fixing tube 442p extending from the center of the lower surface of the closing flange 442f, for pressing and fixing the upper surface of the hook piece 421 while supporting the outer peripheral surface of the lower end portion of the valve stem 420.

In this case, a hemispherical upper positioning groove 421g (see fig. 4 a) formed in the center of the lower surface of the hook piece 421 and a hemispherical lower positioning groove 441g formed in the center of the inner bottom surface of the cup 441 may be further provided so that the lower end portion of the stem 420, i.e., the hook piece 421 and the valve disc portion 440 can be accurately centered.

Therefore, the positioning ball 445 is disposed between the upper and lower positioning grooves 421g, 441g, so that the blocking flange 442f of the disk cup 442 cannot be fitted and accurately seated with the disk cup 441 as long as the valve stem 420 and the valve disk 440 are not accurately aligned in the center.

That is, after the operator has accurately set the detent ball 445 in the lower detent 441g, the disc cup 441 and the disc cup 442 are accurately coupled only when the upper detent 421g of the catch piece 421 hits the detent ball 445, and thus, the stem 420 and the disc portion 440 are accurately centered.

Such accurate centering alignment of the valve stem 420 and the valve disk portion 440 allows the chamfered surface 441f of the valve disk portion 440 to be seated on or separated from the disk portion 450 accurately and quickly without vibration by virtue of the lifting and lowering operation induced by the forward and reverse rotations of the valve stem 420, so that vibration resistance can be improved.

On the other hand, as shown in the drawing, the cryogenic valve body 400 may further include a bushing 483, a third yoke 484, a plurality of support rods 485, a filler 487, and an upper flange 490.

An upper flange 490 extends from the lower face of the gear case 432 and has a lower face opposite the upper face of the lower flange 480.

The support rods 485 connect the upper flange 490 and the lower flange 480, and support the drive transmission system 430 such that the valve rod 420 is disposed at the center, and are radially disposed with respect to the valve rod 420.

The bushing 483 is disposed at an upper side of the second elevation hole 482 to support rotation and elevation of the valve stem 420.

The third yoke 484 extends along the outer peripheral surface of the upper end portion of the bushing 483, and fixes the bushing 483 by a plurality of joints 481 in a state of being spaced apart from and facing the upper surface of the lower flange 480.

The packing 487 is a cylindrical member having an upper face that is in contact with the lower end face of the bushing 483 and a lower face that is seated in an annular seating groove 486 that has a larger diameter than the second lift hole 482 on the upper side of the second lift hole 482 and is formed in a staggered manner, and the packing 487 maintains air tightness between the lower flange 480 and the second yoke 470 and the outer circumferential surface of the valve stem 420.

The filler 487 may be made of a material resistant to a very low temperature so as to maintain durability against a very low temperature impact and maintain airtightness for a long time, and is preferably attached between the lower flange 480 and the outer circumferential surface of the second yoke 470 and the valve stem 420 without being attached to the valve body 410.

In addition, as shown in the drawing, the very low temperature valve body 400 may be applied to an embodiment further including an indicator plate 491 and an indicator 492.

The indicator 491 is attached to the upper outer peripheral surface of the valve rod 420, and moves up and down integrally with the valve rod 420 between the upper flange 490 and the lower flange 480.

The indicator 492 is attached to one of the support rods 485, and is marked with a plurality of scales that enable visual confirmation of whether the valve body 410 is opened or closed as the indicator 491 ascends and descends.

Therefore, if the indicator 491 is located on the upper side of the indicator 492 as shown in fig. 4(a), the operator or the monitoring module 300 can grasp that the communication between the first tank 110 side and the second tank 120 side is allowed, and if it is located on the lower side of the indicator 492 as shown in fig. 4b, that the communication between the first tank 110 side and the second tank 120 side is cut off.

As shown in the drawing, the cryogenic valve body 400 may be provided with a partition wall 417, a disk 450, a cage 452, and a flow hole 452 h.

The partition 417 partitions the internal space of the valve body 410 into an upper flow space 417u connecting the first communication port 413 and the second port 412 and a lower flow space 417d connecting the first port 411 and the second communication port 414.

The disk 450 is placed in a sheet hole 417ch formed through a partition wall 417c arranged in parallel with the upper surface of the first communication port 413 and the lower surface of the second communication port 414 in the partition wall 417.

The cage 452 is a cylindrical member that houses the valve disc portion 440, and has a lower end portion that is seated and fixed to an annular split layer 451 formed in a split manner along the upper edge of the disc 450, and an upper end portion that is contact-fixed to the lower face of the first bonnet 415.

A plurality of flow holes 452h are formed to penetrate along the outer peripheral surface of the cage 452, and are provided to allow the LNG cargo to flow from the first tank 110 to the second tank 120.

Therefore, as the valve stem 420 ascends, if the valve disc portion 440 is separated from the disc 450 as shown in fig. 4(a), communication between the first and second tanks 110 and 120 is allowed.

Also, as the valve stem 420 descends, the valve disc portion 440 is contact-mounted to the disc 450 as shown in fig. 4(b), and the communication between the first and second cans 110 and 120 is cut off.

On the other hand, the length of the stem 420 is preferably 4 to 6 times the length of a first imaginary line L1 (see fig. 3 below) passing through the center of the piece hole 417ch and the first communication port 413.

However, when the length of the first virtual line L1 is less than 4 times, low-temperature brittleness or freezing due to very low-temperature impact occurs in the drive transmission system 430 of the very low-temperature valve body 400, and when the length exceeds 6 times of the length of the first virtual line L1, the size and volume of the very low-temperature valve body 400 are increased as a whole, and the space usage is reduced, which increases unnecessary material waste.

As described above, the basic technical idea of the present invention is to provide an LNG refueling monitoring system including a cryogenic valve operated by a hydraulic actuator, which is capable of collecting in real time large data of temperature, pressure, flow rate, and the like including an operation state of the cryogenic valve when liquid cargo such as LNG is being refilled, thereby preventing an accident in advance and realizing predictive maintenance of the entire system.

Further, various other modifications and applications may occur to those skilled in the art, which fall within the scope of the basic technical idea of the present invention.