阅读说明：本技术 一种盾构机铰接液压系统 (articulated hydraulic system of shield tunneling machine ) 是由 卢刘扬 袁帅 于 2019-09-25 设计创作，主要内容包括：本发明公开一种盾构机铰接液压系统,包括液压油箱、液压泵、铰接油缸,液压泵的进油口与液压油箱连接,液压泵的出油口通过管道与第一电磁阀的P口连接,第一电磁阀的T口通过管道与液压油箱连接,第一电磁阀的A口通过管道与液压锁的A1口连接,第一电磁阀的B口通过管道与液压锁的B1口连接,液压锁的A2口通过管道连接铰接油缸的无杆腔,液压锁的B2口通过管道连接铰接油缸的有杆腔,铰接油缸与液压油箱之间并联设置浮动回路和背压回路并通过管路连接,液压锁与液压油箱之间设置卸荷回路并通过管路连接,液压泵与液压油箱之间设置锁定回路并通过管路连接,其主要应用于盾构机铰接装置,可满足铰接装置的伸出、缩回、偏转以及随动、锁定等功能。(The invention discloses an shield tunneling machine hinged hydraulic system, which comprises a hydraulic oil tank, a hydraulic pump and a hinged oil cylinder, wherein an oil inlet of the hydraulic pump is connected with the hydraulic oil tank, an oil outlet of the hydraulic pump is connected with a P port of a electromagnetic valve through a pipeline, a T port of a electromagnetic valve is connected with the hydraulic oil tank through a pipeline, an A port of the electromagnetic valve is connected with an A1 port of a hydraulic lock through a pipeline, a B port of a electromagnetic valve is connected with a B1 port of a hydraulic lock through a pipeline, an A2 port of the hydraulic lock is connected with a rodless cavity of the hinged oil cylinder through a pipeline, a B2 port of the hydraulic lock is connected with a rod cavity of the hinged oil cylinder through a pipeline, a floating loop and a back pressure loop are arranged between the hinged oil tank in parallel and are connected through a pipeline, an unloading loop is arranged between the hydraulic lock and the hydraulic oil tank and is connected through a pipeline, a locking loop is arranged between the hydraulic pump and the hydraulic oil tank and is connected through a pipeline.)

The utility model provides an kind of shield constructs articulated hydraulic system of machine, its characterized in that, including hydraulic tank, hydraulic pump (1), articulated hydro-cylinder (11), the oil inlet of hydraulic pump (1) pass through the pipeline with hydraulic tank connects, the oil-out of hydraulic pump (1) passes through the pipeline and is connected with the P mouth of solenoid valve (3), the T mouth of solenoid valve (3) pass through the pipeline with hydraulic tank connects, the A mouth of solenoid valve (3) passes through the pipeline and is connected with the A1 mouth of hydraulic lock (6), the B mouth of solenoid valve (3) passes through the pipeline and is connected with the B1 mouth of hydraulic lock (6), the A2 mouth of hydraulic lock (6) passes through the pipeline and connects the rodless chamber (111) of articulated hydro-cylinder (11), the B2 mouth of hydraulic lock (6) passes through the pipeline and connects the rod chamber (112) of articulated hydro-cylinder (11), articulated hydro-cylinder (11) with parallelly connected the floating circuit and back pressure return circuit that set up between the hydraulic tank and through the pipeline connection, the unloading circuit and hydraulic pump connection between the oil tank, hydraulic pump and hydraulic tank set up the unloading circuit and hydraulic tank connection through the unloading circuit, hydraulic pump connection.

2. The shield tunneling machine articulated hydraulic system of claim 1, wherein the floating circuit comprises a second solenoid valve (5), a th working port (51) of the second solenoid valve (5) is connected with an oil outlet of a hydraulic pump (1) through a pipeline, a third working port (53) of the second solenoid valve (5) is connected with an A port of a hydraulic control one-way valve (101) through a pipeline, a B port of a hydraulic control one-way valve (101) is connected with a rodless cavity (111) of the articulated cylinder (11) through a pipeline, a C port of the second solenoid valve (5) is connected with an A port of a second hydraulic control one-way valve (102) through a pipeline, a B port of the second hydraulic control one-way valve (102) is connected with a rod cavity (112) of the articulated cylinder (11) through a pipeline, and a C port of the second hydraulic control one-way valve (102) is connected with the hydraulic oil tank.

3. The shield tunneling machine articulated hydraulic system of claim 2, wherein the second solenoid valve (5) is a two-position, three-way valve.

4. The shield tunneling machine articulated hydraulic system of claim 2, wherein the second working port (52) of the electromagnetic valve (5) is connected with an oil inlet of an th check valve (4) through a pipeline, and an oil outlet of the th check valve (4) is connected with the hydraulic oil tank through a pipeline.

5. The shield tunneling machine articulated hydraulic system of claim 1, wherein the backpressure circuit comprises a fourth overflow valve (8), an oil outlet of the fourth overflow valve (8) is connected with the hydraulic oil tank through a pipeline, an oil inlet of the fourth overflow valve (8) is connected with an oil outlet of a second one-way valve (9) through a pipeline, and an oil inlet of the second one-way valve (9) is connected with a port C of the hydraulic control one-way valve (102) through a pipeline.

6. The shield tunneling machine articulated hydraulic system of claim 1, wherein the locking circuit comprises an -th overflow valve (2), an oil outlet of the -th overflow valve (2) is connected with an oil outlet of a hydraulic pump (1) through a pipeline, and an oil inlet of the -th overflow valve (2) is connected with the hydraulic oil tank.

7. The shield tunneling machine articulated hydraulic system of claim 1, wherein the unloading loop comprises a second overflow valve (71) and a third overflow valve (72), an oil inlet of the second overflow valve (71) is connected with the port B2 of the hydraulic lock (6) through a pipeline, an oil inlet of the second overflow valve (71) is connected with the hydraulic oil tank through a pipeline, an oil inlet of the third overflow valve (72) is connected with the port A2 of the hydraulic lock (6) through a pipeline, and an oil outlet of the third overflow valve (72) is connected with the hydraulic oil tank through a pipeline.

8. The shield tunneling machine articulation hydraulic system according to claim 1, characterized in that the -th solenoid valve (3) is a four-position, three-way valve.

9. The shield tunneling machine articulated hydraulic system according to claim 1, wherein a stroke sensor (12) is mounted on the articulated cylinder (11), and the stroke sensor (12) is used for detecting the speed and displacement of the articulated cylinder (11) during the extending and retracting process and feeding data back to the PLC controller for controlling the posture of the shield tunneling machine during the articulating action.

Technical Field

The invention relates to the field of shield machines, in particular to an shield machine hinged hydraulic system.

Background

The shield machine is used for driving special engineering machinery in tunnel constructions, shield segments are main assembly members of the shield construction, are outmost barriers of the tunnel and bear the effects of resisting soil layer pressure, underground water pressure and special loads, the sensitivity L/D of the shield machine generally reaches about 1.3, construction in a curve section is difficult, construction of the tunnel with a curve is facilitated, the operation performance of the shield machine is improved, the shield machine is divided into a front part and a rear part, the middle parts are connected through jacks, and hinging devices are formed.

At present, an articulated system in the prior art is divided into a passive articulated system and an active articulated system according to the installation position of an articulated oil cylinder, wherein the passive articulated system is installed at the rear part of a shield body and is suitable for tunnels with larger radius of straight roads and curved roads, the active articulated system is installed at the middle position of the shield body and is suitable for tunnels with various forms, particularly tunnels with smaller radius of curved roads, and in order to meet the requirements of curve tunneling construction of a shield machine and self posture adjustment and deviation correction in the tunneling process, articulated hydraulic systems for driving the articulated devices to act are designed, and are connected with the articulated devices and jacks and used for driving the jacks to work.

Disclosure of Invention

The invention aims to provide shield machine hinged hydraulic systems connected with shield machine hinged devices, so that the shield machine drives the hinged devices to act in the process of tunneling construction of a curved section, and the functions of extending, retracting, deflecting, following, locking and the like of the hinged devices are realized.

The technical scheme of the invention is as follows:

kind of shield constructs quick-witted articulated hydraulic system, including hydraulic tank, hydraulic pump, articulated hydro-cylinder, the oil inlet of hydraulic pump pass through the pipeline with hydraulic tank connects, the oil-out of hydraulic pump passes through the pipeline and is connected with the P mouth of solenoid valve, the T mouth of solenoid valve pass through the pipeline with hydraulic tank connects, the A mouth of solenoid valve passes through the pipeline and is connected with the A1 mouth of hydraulic lock, the B mouth of solenoid valve passes through the pipeline and is connected with the B1 mouth of hydraulic lock, the A2 mouth of hydraulic lock passes through the pipe connection the rodless chamber of articulated hydro-cylinder, the B2 mouth of hydraulic lock passes through the pipe connection the pole chamber of articulated hydro-cylinder, articulated hydro-cylinder with set up floating circuit and backpressure circuit and pass through the tube coupling between the hydraulic tank, the hydraulic lock with the sword of hydraulic tank sets up the off-load circuit and passes through the tube coupling, the hydraulic pump with set up the locking circuit between the hydraulic tank and pass through the tube coupling.

is further improved in that the floating circuit comprises a second electromagnetic valve, a working port of the second electromagnetic valve is connected with an oil outlet of a hydraulic pump through a pipeline, a third working port of the second electromagnetic valve is connected with a port A of a hydraulic control one-way valve through a pipeline, a port B of the hydraulic control one-way valve is connected with a rodless cavity of the hinged oil cylinder through a pipeline, a port C of the second electromagnetic valve is connected with a rod cavity of the hinged oil cylinder through a pipeline, and a port C of the second hydraulic control one-way valve is connected with the hydraulic oil tank.

A further improvement is that the second solenoid valve is a two-position, three-way valve.

The improvement of is that the second working port of the solenoid valve is connected with the oil inlet of the one-way valve through a pipeline, and the oil outlet of the one-way valve is connected with the hydraulic oil tank through a pipeline.

The improvement of the inlet is that the backpressure circuit comprises a fourth overflow valve, the oil outlet of the fourth overflow valve is connected with the hydraulic oil tank through a pipeline, the oil inlet of the fourth overflow valve is connected with the oil outlet of the second one-way valve through a pipeline, and the oil inlet of the second one-way valve is connected with the port C of the hydraulic control one-way valve through a pipeline.

The improvement of step is that the locking circuit comprises a overflow valve, the oil outlet of the overflow valve is connected with the oil outlet of the hydraulic pump through a pipeline, and the oil inlet of the overflow valve is connected with the hydraulic oil tank.

The improvement of the step is that the unloading loop comprises a second overflow valve and a third overflow valve, an oil inlet of the second overflow valve is connected with the port B2 of the hydraulic lock through a pipeline, an oil inlet of the second overflow valve is connected with the hydraulic oil tank through a pipeline, an oil inlet of the third overflow valve is connected with the port A2 of the hydraulic lock through a pipeline, and an oil outlet of the third overflow valve is connected with the hydraulic oil tank through a pipeline.

, the improvement is that the th electromagnetic valve is a four-position three-way valve.

is further improved in that the hinged oil cylinder is provided with a forming sensor, and the forming sensor is used for detecting the speed and displacement of the hinged oil cylinder in the extending and retracting processes and feeding data back to the PLC controller for controlling the posture of the shield tunneling machine in the hinging action process.

The beneficial technical effects of the invention are as follows:

(1) the invention can drive the connecting device to act in the tunneling construction process of the shield tunneling machine at the curve section, and realizes the functions of extending, retracting, deflecting, following, locking and the like of the connecting device;

(2) the overflow valve in the locking loop sets the maximum output pressure of the hinge device, and the electromagnetic valve controls the extension and retraction reversing of the hinge oil cylinder; the unloading loop can have the function of a safety valve and prevent the pressure of the hinged oil cylinder from exceeding a limit value; the floating loop can enable the hinged oil cylinder to keep a floating state; the backpressure loop can prevent hydraulic oil from entering the hinged oil cylinder by mistake to cause abnormal reverse opening of the hydraulic control one-way valve.

Drawings

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

FIG. 1 is a schematic diagram of an embodiment of a articulated hydraulic system of a shield tunneling machine;

description of reference numerals:

1. the hydraulic control system comprises a hydraulic pump, a2 st th overflow valve, a 3 st th electromagnetic valve, a 4 th th check valve, a 5 th electromagnetic valve, a 51 st th working port, a 52 th second working port, a 53 th third working port, a 6 th hydraulic lock, a 71 th second overflow valve, a 72 th third overflow valve, a 8 th fourth overflow valve, a 9 th second check valve, a 101 th th hydraulic control check valve, a 102 th second hydraulic control check valve, a 11 th hinged oil cylinder, a 111 th rod cavity, a 112 th rodless cavity, a 12 th stroke sensor.

Detailed Description

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted" and "connected" shall be interpreted , for example, as being either fixedly connected or detachably connected, or physically connected, mechanically connected or electrically connected, directly connected or indirectly connected through an intermediate, so as to communicate between the two elements.

As shown in fig. 1, kinds of shield tunneling machine articulated hydraulic systems include an articulated cylinder 11, where the articulated cylinder 11 is used as an executing element of the articulated hydraulic system, and is connected to a shield tunneling machine articulated device, such as a jack, for the purpose of driving the articulated device to act, and the specific structure and connection relationship are shown in fig. 1:

shield constructs quick-witted articulated hydraulic system, including hydraulic tank, hydraulic tank is used for the storage, the hydraulic oil that cooling articulated system used, hydraulic tank passes through the oil absorption mouth of pipe connection hydraulic pump 1, hydraulic pump 1 is as articulated hydraulic system's power supply, the oil-out of hydraulic pump 1 passes through the P mouth of pipe connection solenoid valve 3, solenoid valve 3 can select the four-way three-way valve for use, the T mouth of solenoid valve 3 passes through the pipe connection hydraulic tank, the A mouth of solenoid valve 3 passes through the A1 mouth of pipe connection hydraulic lock 6, the B mouth of solenoid valve 3 passes through the B1 mouth of pipe connection hydraulic lock 6, the B2 mouth of hydraulic lock 6 passes through the rodless chamber 111 of pipe connection articulated hydro-cylinder 11, the A2 mouth of hydraulic lock 6 passes through the pipe connection articulated hydro-cylinder 11 has the pole chamber 112, constitute the work return circuit of control articulated hydro-cylinder 11 execution extension, the action of withdrawal action.

When the hinge device needs to operate, the hinge oil cylinder 11 extends, namely the hydraulic pump 1 is started, the electromagnet DT1 is electrified, hydraulic oil enters the oil suction port of the hydraulic pump 1 from the hydraulic oil tank, enters the P port of the electromagnetic valve 3 from the oil outlet of the hydraulic pump 1, enters the A1 port of the hydraulic lock 6 from the A port of the electromagnetic valve 3, enters the rodless cavity 111 of the hinge oil cylinder 11 from the B2 port of the hydraulic lock 6 to push the piston rod of the hinge oil cylinder to extend outwards, at the moment, the hydraulic oil in the rod cavity 112 of the hinge oil cylinder 11 enters the A2 port of the hydraulic lock 6, enters the B port of the electromagnetic valve 3 from the B1 port of the hydraulic lock 6, and returns to the hydraulic oil tank from the T port of the electromagnetic.

When the hinge device needs to be steered, the hinge oil cylinder 11 retracts, namely the hydraulic pump 1 is started, the electromagnet DT2 is electrified, hydraulic oil enters an oil suction port of the hydraulic pump 1 from a hydraulic oil tank, enters a P port of the -th electromagnetic valve 3 from an oil outlet of the hydraulic pump 1, enters a B1 port of the hydraulic lock 6 from a B port of the -th electromagnetic valve 3, enters a rod cavity 112 of the hinge oil cylinder 11 from an A2 port of the hydraulic lock 6 to push a piston rod of the hinge oil cylinder 11 to retract inwards, at the moment, the hydraulic oil in a rodless cavity 112 of the hinge oil cylinder 11 enters a B2 port of the hydraulic lock 6, enters an A port of the -th electromagnetic valve 3 from an A1 port of the hydraulic lock 6, and returns to the hydraulic oil tank from.

In order to record the speed and the displacement of the articulated oil cylinder 11 in the extending or retracting process, a stroke sensor 12 is further installed on the articulated oil cylinder 11, and the stroke sensor 12 is used for detecting the speed and the displacement of the articulated oil cylinder in the extending or retracting process and feeding data back to a PLC (programmable logic controller) for controlling the posture of the shield tunneling machine in the articulating action process.

In addition, in order to enable the hinged oil cylinder 11 to be in a floating state, the hinged oil cylinder can be freely stretched under the action of external force, a floating loop is further arranged, the floating loop comprises a second electromagnetic valve 5, the second electromagnetic valve 5 can be a two-position three-way valve, a working port 51 of the second electromagnetic valve 5 is connected with an oil outlet of the hydraulic pump 1 through a pipeline, a third working port 53 of the electromagnetic valve 5 is connected with a port A of a hydraulic control one-way valve 101 through a pipeline, a port B of a hydraulic control one-way valve 101 is connected with a rodless cavity 111 of the hinged oil cylinder 11 through a pipeline, a port C of the second electromagnetic valve 5 is connected with a port A of a second hydraulic control one-way valve 102 through a pipeline, a port B of the second hydraulic control one-way valve 102 is connected with a rod cavity 112 of the hinged oil cylinder 11 through a pipeline, a port B of the second electromagnetic valve 5 is connected with an oil inlet of a hydraulic control one-way valve 4 through a pipeline, an oil outlet of the one-way valve 4 is connected with the hydraulic oil tank, and the port C of the second hydraulic control one-way valve 102 is connected with the hydraulic oil.

When the hinged oil cylinder floats, the hydraulic pump 1 is started, the electromagnet DT3 is electrified, hydraulic oil enters the oil suction port of the hydraulic pump 1 from the hydraulic oil tank, enters the working port 51 of the second electromagnetic valve 5 from the oil outlet of the hydraulic pump 1, enters the A port of the hydraulic control one-way valve 101 and the A port of the second hydraulic control one-way valve 102 from the third working port 53 of the second electromagnetic valve 5, so that the hydraulic control one-way valve 101 and the second hydraulic control one-way valve 102 are opened reversely, at the moment, the hinged oil cylinder is in a floating state, and the hydraulic oil of each loop cannot reach the rodless cavity 111 and the rod cavity 112 of the hinged oil cylinder 11, so that the hinged oil cylinder can realize random extension and.

In order to prevent the pressure of the hinge cylinder 11 from exceeding a limit value, the hydraulic system further comprises an unloading loop, the unloading loop comprises a second overflow valve 71 and a third overflow valve 72, an oil inlet of the second overflow valve 71 is connected with the port A2 of the hydraulic lock 6 through a pipeline, an oil inlet of the second overflow valve 71 is connected with a hydraulic oil tank through a pipeline, an oil inlet of the third overflow valve 72 is connected with the port B2 of the hydraulic lock 6 through a pipeline, an oil outlet of the third overflow valve 72 is connected with the hydraulic oil tank through a pipeline, and when the working loop of the hinge cylinder 11 normally works, the second overflow valve 71 and the third overflow valve 72 are closed. When the load of the rodless cavity 111 of the articulated oil cylinder 11 exceeds a specified limit value, the third overflow valve 72 is automatically opened to perform overload protection, unload redundant hydraulic oil and return to the hydraulic oil tank, and when the load of the rod cavity 112 of the articulated oil cylinder 11 exceeds the specified limit value, the second overflow valve 71 is opened to perform overload protection, unload redundant hydraulic oil and return to the hydraulic oil tank.

In order to prevent hydraulic oil from entering the rodless cavity 111 of the articulated cylinder 11 through the second hydraulic control one-way valve 102 to influence the floating state of the control system, a second one-way valve 9 is further arranged, and an oil inlet of the second one-way valve 9 is connected with a port C of the second hydraulic control one-way valve 102 through a pipeline to be connected with a hydraulic oil tank.

When the hinged oil cylinder 11 is in a floating state, the rodless cavity 111 has a pressure of , in order to eliminate the pressure, a fourth overflow valve 8 is further arranged, an oil outlet of the fourth overflow valve 8 is connected with the hydraulic oil tank through a pipeline, an oil inlet of the fourth overflow valve 8 is connected with an oil outlet of the second one-way valve 9 through a pipeline, when hydraulic oil flows to the fourth overflow valve 8 through the second one-way valve 9, the fourth overflow valve 8 is opened, and redundant hydraulic oil is unloaded to return the redundant hydraulic oil to the hydraulic oil tank.

The arrangement of the fourth relief valve 8 and the second check valve 9 ensures that the rodless chamber 111 and the rod chamber 112 do not have any pressure and the extension and retraction are only affected by external force when the articulated cylinder 11 is in a floating state.

When the current state of the hinge device needs to be maintained, in order to prevent the telescopic action of the hinge oil cylinder from influencing the state of the current hinge device, the hinge device further comprises a locking loop, the locking loop comprises an -th overflow valve 2, an oil outlet of the -th overflow valve 2 is connected with an oil outlet of the hydraulic pump 1 through a pipeline, and an oil inlet of the -th overflow valve 2 is connected with a hydraulic oil tank.

And (3) locking the hinged oil cylinder, namely starting the hydraulic pump 1, enabling hydraulic oil to enter an oil suction port of the hydraulic pump 1 from a hydraulic oil tank, enabling hydraulic oil to enter an oil inlet of the overflow valve 2 from an oil outlet of the hydraulic pump 1, and enabling hydraulic oil to return to the hydraulic oil tank from an oil outlet of the overflow valve 2, wherein the hinged oil cylinder is in a locked state and cannot perform telescopic action under the action of external force, so that the effect of keeping the current state of the hinged device is achieved.

In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.