Hydraulic control system of gas-hydraulic drive device

Abstract

The present invention relates to a hydraulic control system of a gas-liquid linkage drive device, wherein the gas-liquid linkage drive device comprises a gas-liquid linkage cylinder, and the hydraulic control system comprises an A-channel hydraulic module, a B-channel hydraulic module and an oil supply module; the oil supply module provides hydraulic oil for the rod chamber of the gas-liquid linkage cylinder, the rod chamber increases the oil pressure, the volume of the rod chamber increases, the volume of the rodless chamber decreases, and the compressed gas in the rodless chamber stores energy; the A-channel hydraulic module and / or the B-channel hydraulic module are turned on, the oil pressure in the rod chamber is released, the volume of the rod chamber decreases, the compressed gas in the rodless chamber releases energy, the volume of the rodless chamber increases, and the volume of the rod chamber decreases. It adopts a completely independent dual-channel hydraulic control system, which meets the requirements of the single failure criterion and has a redundant design at the same time to ensure functional safety and reliability.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic control technology, and in particular to a hydraulic control system of a gas-liquid linkage drive device. Background Art

[0002] The main feedwater quick-closing isolation valve is one of the key equipment in the pipeline system of nuclear power plants and other pressurized water reactor nuclear power plants. It undertakes important safety functions. Under special conditions such as accident conditions in the system, it is necessary to achieve rapid closure within 5 seconds to isolate the full-load control pipeline, thereby ensuring the safety of the reactor and the system. The driving device of the large-caliber quick-closing isolation valve usually uses a gas-liquid linkage driving device to achieve rapid closure. The hydraulic control circuit of the existing main feedwater isolation valve gas-liquid linkage driving device is mainly controlled and monopolized by foreign countries, and has certain control defects, low reliability, and the risk of misoperation. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a hydraulic control system for a gas-liquid linkage drive device, which has a compact structure, simple control and high reliability.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A hydraulic control system for a gas-liquid linkage drive device, the gas-liquid linkage drive device includes a gas-liquid linkage cylinder, the gas-liquid linkage cylinder includes a rod chamber and a rodless chamber, the rod chamber of the gas-liquid linkage cylinder is respectively provided with a first oil port and a second oil port, and the rodless chamber of the gas-liquid linkage cylinder is filled with compressed gas; the hydraulic control system includes an A channel hydraulic module, a B channel hydraulic module and an oil supply module; the oil inlet of the oil supply module is connected to the oil tank, the oil discharge port of the oil supply module is connected to the oil inlet of the A channel hydraulic module, and the oil return port of the A channel hydraulic module is connected to the oil tank; the rod chamber The first oil port is connected with the oil inlet of the A channel hydraulic module, the second oil port of the rod chamber is connected with the oil inlet of the B channel hydraulic module, and the oil return port of the B channel hydraulic module is connected with the oil tank; the oil supply module provides hydraulic oil to the rod chamber of the gas-liquid linkage cylinder, the oil pressure in the rod chamber increases, the volume of the rod chamber increases, the volume of the rodless chamber decreases, and the compressed gas in the rodless chamber stores energy; the A channel hydraulic module and / or the B channel hydraulic module are turned on, the oil pressure in the rod chamber is released, the volume of the rod chamber decreases, the compressed gas in the rodless chamber releases energy, the volume of the rodless chamber increases, and the volume of the rod chamber decreases.

[0006] Further, the A channel hydraulic module includes a first hydraulically controlled valve assembly, a second hydraulically controlled valve assembly and a solenoid valve assembly; the oil inlet of the first hydraulically controlled valve assembly is respectively connected to the first oil port of the rod chamber and the oil outlet of the oil supply module, the oil outlet of the first hydraulically controlled valve assembly is connected to the oil inlet of the second hydraulically controlled valve assembly, and the oil outlet of the second hydraulically controlled valve assembly is connected to the oil tank; the oil inlet of the solenoid valve assembly is connected to the oil inlet of the second hydraulically controlled valve assembly, and the oil outlet of the solenoid valve assembly is connected to the oil tank;

[0007] The first hydraulic control valve assembly comprises a first two-position three-way solenoid valve and a first cartridge valve; the oil inlet of the first two-position three-way solenoid valve is respectively connected to the first oil port of the rod chamber and the oil discharge port of the oil supply module, the oil return port of the first two-position three-way solenoid valve is connected to the oil tank, the working oil port of the first two-position three-way solenoid valve is connected to the control oil port of the first cartridge valve, and the oil inlet of the first cartridge valve is connected to the oil inlet of the first two-position three-way solenoid valve;

[0008] The second hydraulic control valve assembly comprises a second two-position three-way solenoid valve and a second cartridge valve, the oil outlet of the first cartridge valve is communicated with the oil inlet of the second two-position three-way solenoid valve, the oil return port of the second two-position three-way solenoid valve is communicated with the oil tank, the working oil port of the second two-position three-way solenoid valve is communicated with the control oil port of the second cartridge valve, the oil inlet of the second cartridge valve is communicated with the oil inlet of the second two-position three-way solenoid valve, and the oil outlet of the second cartridge valve is communicated with the oil tank;

[0009] The solenoid valve assembly includes a first two-position two-way solenoid valve, a second two-position two-way solenoid valve and a third throttle valve, the oil inlet of the first two-position two-way solenoid valve is connected to the oil inlet of the second cartridge valve, the oil outlet of the first two-position two-way solenoid valve is connected to the oil inlet of the second two-position two-way solenoid valve, the oil outlet of the second two-position two-way solenoid valve is connected to the oil inlet of the third throttle valve, and the oil outlet of the third throttle valve is connected to the oil tank.

[0010] Furthermore, the first hydraulic control valve assembly also includes a second throttle valve, the oil inlet of the second throttle valve is respectively connected to the first oil port of the rod chamber and the oil discharge port of the oil supply module, and the oil outlet of the second throttle valve is connected to the oil inlet of the first two-position three-way solenoid valve; the A channel hydraulic module also includes a second overflow valve, the oil inlet of the second overflow valve is connected to the oil inlet of the second two-position three-way solenoid valve, and the oil outlet of the second overflow valve is connected to the oil tank.

[0011] Furthermore, the first hydraulic control valve assembly further includes a first pressure switch, which is arranged in the oil circuit between the working oil port of the first two-position three-way solenoid valve and the control oil port of the first cartridge valve;

[0012] The second hydraulic control valve assembly further includes a second pressure switch and a third pressure switch, wherein the second pressure switch is arranged on the oil circuit between the working oil port of the second two-position three-way solenoid valve and the control oil port of the second cartridge valve, and the third pressure switch is arranged on the oil circuit between the oil inlet of the second two-position three-way solenoid valve and the oil inlet of the second cartridge valve;

[0013] The first cartridge valve and the second cartridge valve are both flow control cartridge valves, and valve core stroke regulators are disposed on the valve covers of the first cartridge valve and the second cartridge valve for adjusting the respective valve core openings.

[0014] Further, the B channel hydraulic module includes a third hydraulic control valve assembly and a fourth hydraulic control valve assembly, the oil inlet of the third hydraulic control valve assembly is communicated with the second oil port of the rod chamber, the oil outlet of the third hydraulic control valve assembly is communicated with the oil inlet of the fourth hydraulic control valve assembly, and the oil outlet of the fourth hydraulic control valve assembly is communicated with the oil tank;

[0015] The third hydraulic control valve assembly comprises a third two-position three-way solenoid valve and a third cartridge valve; the oil inlet of the third two-position three-way solenoid valve is connected to the second oil port of the rod chamber, the oil return port of the third two-position three-way solenoid valve is connected to the oil tank, and the working oil port of the third two-position three-way solenoid valve is connected to the control oil port of the third cartridge valve;

[0016] The fourth hydraulic control valve assembly includes the fourth two-position three-way solenoid valve and a fourth cartridge valve; the oil outlet of the third cartridge valve is connected to the oil inlet of the fourth two-position three-way valve, the oil return port of the fourth two-position three-way solenoid valve is connected to the oil tank, the working oil port of the fourth two-position three-way solenoid valve is connected to the control oil port of the fourth cartridge valve, the oil inlet of the fourth cartridge valve is connected to the oil inlet of the fourth two-position three-way solenoid valve, and the oil outlet of the fourth cartridge valve is connected to the oil tank.

[0017] Furthermore, the third hydraulic control valve assembly further includes a fourth throttle valve, the oil inlet of the fourth throttle valve is communicated with the second oil port of the rod chamber, and the oil outlet of the fourth throttle valve is communicated with the oil inlet of the third two-position three-way solenoid valve;

[0018] The B channel hydraulic module further comprises a third relief valve, an oil inlet of the third relief valve is communicated with an oil inlet of the fourth two-position three-way valve, and an oil outlet of the third relief valve is communicated with an oil tank;

[0019] The B channel hydraulic module also includes a fifth throttle valve, an oil inlet of the fifth throttle valve is connected to the oil inlet of the fourth two-position three-way valve, and an oil outlet of the fifth overflow valve is connected to the oil tank.

[0020] Furthermore, the third hydraulic control valve assembly further includes a fourth pressure switch, and the fourth pressure switch is arranged in the oil circuit between the working oil port of the third two-position three-way solenoid valve and the control oil port of the third cartridge valve;

[0021] The fourth hydraulic control valve assembly further includes a fifth pressure switch and a sixth pressure switch, the fifth pressure switch being arranged on the oil circuit between the working oil port of the fourth two-position three-way solenoid valve and the control oil port of the fourth cartridge valve, and the sixth pressure switch being arranged on the oil circuit between the oil inlet of the fourth two-position three-way solenoid valve and the oil inlet of the fourth cartridge valve;

[0022] The third cartridge valve and the fourth cartridge valve are both flow control cartridge valves, and valve core stroke regulators are disposed on the valve covers of the third cartridge valve and the fourth cartridge valve for adjusting the respective valve core openings.

[0023] Further, the oil supply module includes a motor, a hydraulic pump, a first relief valve and a first check valve; the motor is drivingly connected to the hydraulic pump, and is used to drive the hydraulic pump to output hydraulic oil, the oil inlet of the hydraulic pump is connected to the oil tank, the oil outlet of the hydraulic pump is connected to the oil inlet of the first relief valve, the oil outlet of the first relief valve is connected to the oil tank, the oil inlet of the first check valve is connected to the oil inlet of the first relief valve, and the oil outlet of the first check valve is connected to the oil inlet of the A channel hydraulic module;

[0024] A second one-way valve is arranged on the oil circuit between the first overflow valve and the hydraulic pump, the oil inlet of the second one-way valve is connected to the oil outlet of the hydraulic pump, and the oil outlet of the second one-way valve is connected to the oil inlet of the first overflow valve; a filter is arranged on the oil circuit between the first one-way valve and the first overflow valve, the oil inlet of the filter is connected to the oil inlet of the first overflow valve, and the oil outlet of the filter is connected to the oil inlet of the first one-way valve; a first throttle valve is arranged on the oil circuit between the first one-way valve and the oil inlet of the A-channel hydraulic module, the oil inlet of the first throttle valve is connected to the oil outlet of the first one-way valve, and the oil outlet of the first throttle valve is respectively connected to the oil inlet of the A-channel hydraulic module and the first oil port of the rod chamber.

[0025] Furthermore, a piston and a piston rod are provided in the rod chamber, one end of the piston rod is connected to the piston, and the other end of the piston rod extends out of the rod chamber; the rodless chamber is connected to an air storage device, and the air storage device is two air tanks arranged in parallel; the rodless chamber is respectively connected to two pressure transmitters, a pressure gauge and an inflation valve through pipelines, a throttle valve is provided on the pipeline between each pressure transmitter and the rodless chamber, and a throttle valve is provided on the pipeline between the pressure gauge and the rodless chamber and on the pipeline between the inflation valve and the rodless chamber.

[0026] Furthermore, it also includes an accumulator, which is connected to the oil circuit between the oil inlet of the A channel hydraulic module and the first oil port of the rod chamber through a throttle valve. Two pressure transmitters and a pressure gauge are also arranged on the oil circuit between the oil inlet of the A channel hydraulic module and the first oil port of the rod chamber. The two pressure transmitters and the pressure gauge are respectively connected to the oil circuit between the oil inlet of the A channel hydraulic module and the first oil port of the rod chamber through a throttle valve.

[0027] The beneficial effects of the present invention compared with the prior art are:

[0028] The hydraulic control system of the gas-liquid linkage drive device provided in the present application adopts a completely independent dual-channel hydraulic control system, which meets the requirements of the single failure criterion and also has a redundant design to ensure functional safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the principle of the hydraulic control system of the gas-liquid linkage drive device of the present invention;

[0030] Figure 2 for Figure 1 The local structure diagram of

[0031] Figure 3 It is the control logic diagram of the present invention.

[0032] In the figure: 1: gas-liquid linkage cylinder, 1.1: rodless chamber, 1.2: piston, 1.3: piston rod, 1.4: rod chamber, 1.4a: first oil port, 1.4b: second oil port, 2: oil tank, 3: A channel hydraulic module, 4: B channel hydraulic module, 5: oil supply module, PV: accumulator, QV1, QV2: air storage tank, PT12, PT22, QT12, QT2: pressure transmission, PI1, QI1: pressure gauge, QA: charging valve, L20, L22, LP1, LP2, LP3, LP4, LQ1, LQ2, LQ3, LQ4: throttle valve, YV11: first two-position three-way solenoid valve, YV12: first 22-position 3-way solenoid valve, YV21: 32-position 3-way solenoid valve, YV22: 42-position 3-way solenoid valve, CE11: 1st cartridge valve, CE12: 2nd cartridge valve, CE21: 3rd cartridge valve, CE22: 4th cartridge valve, YV13: 1st 2-position 2-way solenoid valve, YV14: 2nd 2-position 2-way solenoid valve, L12: 3rd throttle valve, L11: 2nd throttle valve, L21: 4throttle valve, L20: 5th throttle valve, Y10: 1st overflow valve, Y11: 2nd overflow valve, Y21: 3rd overflow valve, SP11: 1st pressure switch, SP12: 2nd pressure switch, SP13: 3rd pressure switch, SP21 : The fourth pressure switch, SP22: The fifth pressure switch, SP23: The sixth pressure switch, PA11: The first pressure measuring point, PA12: The second pressure measuring point, PA13: The third pressure measuring point, PA21: The fourth pressure measuring point, PA22: The fifth pressure measuring point, PA23: The sixth pressure measuring point, M: Motor, D: Hydraulic pump, A01: The second check valve, FYL, FYL: Filter, A02: The first check valve, L10: The first throttle valve, HB1, HB2: Buffer, Ta2, Tb2: Oil return port, LS: Liquid level switch, TS1: Temperature switch. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1

[0035] like Figure 1-3As shown, the hydraulic control system of the gas-liquid linkage drive device, the gas-liquid linkage drive device is used to drive the opening and closing of the main water supply isolation valve, which includes a gas-liquid linkage cylinder 1, the gas-liquid linkage cylinder 1 includes a rod chamber 1.4 and a rodless chamber 1.1, the rod chamber 1.4 is provided with a piston 1.2 and a piston rod 1.3, one end of the piston rod 1.3 is connected to the piston 1.2, and the other end of the piston rod 1.3 extends out of the rod chamber 1.4; the rod chamber 1.4 is respectively provided with a first oil port 1.4a and a second oil port 1.4b, specifically, the first oil port 1.4a and the first and second oil ports are symmetrically arranged at one end away from the rodless chamber 1.1. The rodless chamber 1.1 is filled with compressed gas, and the compressed gas in this embodiment is compressed nitrogen. The rodless chamber 1.1 is connected to a gas storage device, and the gas storage device is two gas storage tanks (QV1, QV2) arranged in parallel; each gas storage tank (QV1, QV2) is filled with nitrogen. The rodless chamber 1.1 is connected to two pressure transmitters QT12, QT2, a pressure gauge QI1 and an inflation valve QA through pipelines. A throttle valve LQ1, LQ2 is arranged on the pipeline between each pressure transmitter QT12, QT2 and the rodless chamber 1.1. A throttle valve LQ3, LQ4 is arranged on the pipeline between the pressure gauge QI1 and the rodless chamber 1.1 and on the pipeline between the inflation valve QA and the rodless chamber 1.1.

[0036] The hydraulic control system includes an A channel hydraulic module 3, a B channel hydraulic module 4, an oil supply module 5 and an oil tank 2; the oil inlet of the oil supply module 5 is connected to the oil tank 2, the oil outlet of the oil supply module 5 is connected to the oil inlet of the A channel hydraulic module 3, and the oil return end Ta2 of the A channel hydraulic module 3 is connected to the oil tank 2; the first oil port 1.4a of the rod chamber 1.4 is connected to the oil inlet of the A channel hydraulic module 3, the second oil port 1.4b of the rod chamber 1.4 is connected to the oil inlet of the B channel hydraulic module 4, and the oil return port 1.2 of the B channel hydraulic module 4 is connected to the oil inlet of the B channel hydraulic module 4. Tb2 is connected to the oil tank 2; when in use, the oil supply module 5 provides hydraulic oil to the rod chamber 1.4 of the gas-liquid linkage cylinder 1, the rod chamber 1.4 increases the oil pressure, the volume of the rod chamber 1.4 increases, the volume of the rodless chamber 1.1 decreases, and the compressed gas in the rodless chamber 1.1 stores energy; the A channel hydraulic module 3 and / or the B channel hydraulic module 4 are turned on, the oil pressure in the rod chamber 1.4 is released, the volume of the rod chamber 1.4 decreases, the compressed gas in the rodless chamber 1.1 releases energy, the volume of the rodless chamber 1.1 increases, and the volume of the rodless chamber 1.4 decreases. It should be noted that this embodiment realizes the control of the movement of the gas-liquid linkage cylinder 1 through two completely independent hydraulic modules (A channel hydraulic module 3, B channel hydraulic module 4) connected to the rod chamber 1.4, that is, it meets the requirements of the single failure criterion and has a redundant design at the same time to ensure functional safety and reliability.

[0037] The A channel hydraulic module 3 of the present embodiment includes a first hydraulically controlled valve assembly, a second hydraulically controlled valve assembly and a solenoid valve assembly arranged in parallel, the oil inlet of the first hydraulically controlled valve assembly is respectively connected to the first oil port 1.4a of the rod chamber 1.4 and the oil outlet of the oil supply module 5, the oil outlet of the first hydraulically controlled valve assembly is connected to the oil inlet of the second hydraulically controlled valve assembly, and the oil outlet of the second hydraulically controlled valve assembly is connected to the oil tank 2; the oil inlet of the solenoid valve assembly is connected to the oil inlet of the second hydraulically controlled valve assembly, and the oil outlet of the solenoid valve assembly is connected to the oil tank 2; it should be noted that the first hydraulically controlled valve assembly is of a normally open type, which serves as an isolation when closed, the second hydraulically controlled valve assembly is of a normally closed type, which realizes fast valve closing when opened, and the solenoid valve assembly is of a normally closed type, which realizes slow valve closing when opened. The above technical scheme can realize slow closing and fast closing of the valve through the A channel hydraulic module 3; when oil enters the rod chamber 1.4, the first hydraulically controlled valve assembly is opened, the second hydraulically controlled valve assembly is closed, and the solenoid valve assembly is closed; when the rod chamber 1.4 drains oil slowly, the first hydraulically controlled valve assembly is opened, the second hydraulically controlled valve assembly is closed, and the solenoid valve assembly is opened; when the rod chamber 1.4 drains oil quickly, the first hydraulically controlled valve assembly is opened, the second hydraulically controlled valve assembly is opened, and the solenoid valve assembly is closed.

[0038] Specifically, the first hydraulic control valve assembly includes a first two-position three-way solenoid valve YV11 and a first cartridge valve CE11, the second hydraulic control valve assembly includes a second two-position three-way solenoid valve YV12 and a second cartridge valve CE12, the solenoid valve assembly includes a first two-position two-way solenoid valve YV13, a second two-position two-way solenoid valve YV14 and a third throttle valve L12 arranged in series; the oil inlet of the first two-position three-way solenoid valve YV11 is respectively connected to the first oil port 1.4a of the rod chamber 1.4 and the oil outlet of the oil supply module 5, the oil return port of the first two-position three-way solenoid valve YV11 is connected to the oil tank 2, the working oil port of the first two-position three-way solenoid valve YV11 is connected to the control oil port of the first cartridge valve CE11, the oil inlet of the first cartridge valve CE11 is connected to the oil inlet of the first two-position three-way solenoid valve YV11, and the first cartridge valve CE11 is connected to the oil outlet of the first two-position three-way solenoid valve YV11. The oil outlet of E11 is connected with the oil inlet of the second two-position three-way solenoid valve YV12, the oil return port of the second two-position three-way solenoid valve YV12 is connected with the oil tank 2, and the working oil port of the second two-position three-way solenoid valve YV12 is connected with the control oil port of the second cartridge valve CE12; the oil inlet of the second cartridge valve CE12 is connected with the oil inlet of the second two-position three-way solenoid valve YV12, and the oil outlet of the second cartridge valve CE12 is connected with the oil tank 2; the oil inlet of the first two-position two-way solenoid valve YV13 is connected with the oil inlet of the second cartridge valve CE12, the oil outlet of the first two-position two-way solenoid valve YV13 is connected with the oil inlet of the second two-position two-way solenoid valve YV14, the oil outlet of the second two-position two-way solenoid valve YV14 is connected with the oil inlet of the third throttle valve L12, and the oil outlet of the third throttle valve L12 is connected with the oil tank 2. It should be noted that the third throttle valve L12 is used to adjust the slow closing speed of the valve. The first hydraulic control valve assembly also includes a second throttle valve L11, the oil inlet of the second throttle valve L11 is connected to the first oil port 1.4a of the rod chamber 1.4 and the oil outlet of the oil supply module 5, and the oil outlet of the second throttle valve L11 is connected to the oil inlet of the first two-position three-way solenoid valve YV11.

[0039] It should be noted that the pilot solenoid valve composed of the first two-position three-way solenoid valve YV11 and the first cartridge valve CE11 in the first hydraulic control valve assembly plays the role of isolating channel A; the pilot solenoid valve composed of the second two-position three-way solenoid valve YV12 and the second cartridge valve CE12 in the second hydraulic control valve assembly plays the role of quickly opening and closing channel A.

[0040] The A channel hydraulic module 3 also includes a second overflow valve Y11 , an oil inlet of the second overflow valve Y11 is connected to an oil inlet of a second two-position three-way solenoid valve YV12 , and an oil outlet of the second overflow valve Y11 is connected to the oil tank 2 .

[0041] The first hydraulically controlled valve assembly of the present embodiment also includes a first pressure switch SP11, which is arranged on the oil circuit between the working oil port of the first two-position three-way solenoid valve YV11 and the control oil port of the first cartridge valve CE11, and is connected to the first pressure measuring point PA11; the second hydraulically controlled valve assembly also includes a second pressure switch SP12 and a third pressure switch SP13, the second pressure switch SP12 is arranged on the oil circuit between the working oil port of the second two-position three-way solenoid valve YV12 and the control oil port of the second cartridge valve CE12, and is connected to the second pressure measuring point PA12, and the third pressure switch SP13 is arranged on the oil circuit between the oil inlet of the second two-position three-way solenoid valve YV12 and the oil inlet of the second cartridge valve CE12, and is connected to the third pressure measuring point PA13.

[0042] The B channel hydraulic module 4 of the present embodiment includes a third hydraulically controlled valve assembly and a fourth hydraulically controlled valve assembly. The oil inlet of the third hydraulically controlled valve assembly is connected to the second oil port 1.4b of the rod chamber 1.4, the oil outlet of the third hydraulically controlled valve assembly is connected to the oil inlet of the fourth hydraulically controlled valve assembly, and the oil outlet of the fourth hydraulically controlled valve assembly is connected to the oil tank 2; it should be noted that the third hydraulically controlled valve assembly is of a normally open type, which plays an isolation role when closed, and the fourth hydraulically controlled valve assembly is of a normally closed type, which realizes rapid valve closing when opened. The above technical scheme can realize rapid valve closing through the B channel hydraulic module 4; when oil enters the rod chamber 1.4, the third hydraulically controlled valve assembly opens and the fourth hydraulically controlled valve assembly closes; when the rod chamber 1.4 quickly drains oil, the third hydraulically controlled valve assembly opens and the fourth hydraulically controlled valve assembly opens.

[0043] Specifically, the third hydraulic control valve assembly includes a third two-position three-way solenoid valve YV21 and a third cartridge valve CE21, and the fourth hydraulic control valve assembly includes a fourth two-position three-way solenoid valve YV22 and a fourth cartridge valve CE22; the oil inlet of the third two-position three-way solenoid valve YV21 is connected to the second oil port 1.4b of the rod chamber 1.4, the oil return port of the third two-position three-way solenoid valve YV21 is connected to the oil tank 2, the working oil port of the third two-position three-way solenoid valve YV21 is connected to the control oil port of the third cartridge valve CE21, and the third cartridge valve CE2 The oil inlet of the third two-position three-way solenoid valve YV21 is connected to the oil inlet of the third two-position three-way solenoid valve YV21, the oil outlet of the third cartridge valve CE21 is connected to the oil inlet of the fourth two-position three-way solenoid valve YV22, the oil return port of the fourth two-position three-way solenoid valve YV22 is connected to the oil tank 2, the working oil port of the fourth two-position three-way solenoid valve YV22 is connected to the control oil port of the fourth cartridge valve CE22, the oil inlet of the fourth cartridge valve CE22 is connected to the oil inlet of the fourth two-position three-way solenoid valve YV22, and the oil outlet of the fourth cartridge valve CE22 is connected to the oil tank 2. The third hydraulic control valve assembly also includes a fourth throttle valve L21, the oil inlet of the fourth throttle valve L21 is connected to the second oil port 1.4b of the rod chamber 1.4, and the oil outlet of the fourth throttle valve L21 is connected to the oil inlet of the third two-position three-way solenoid valve YV21.

[0044] It should be noted that the pilot solenoid valve composed of the third two-position three-way solenoid valve YV21 and the third cartridge valve CE21 in the third hydraulic control valve assembly plays the role of isolating channel B; the pilot solenoid valve composed of the fourth two-position three-way solenoid valve YV22 and the fourth cartridge valve CE22 in the fourth hydraulic control valve assembly plays the role of quickly opening and closing channel B.

[0045] The B channel hydraulic module 4 of this embodiment also includes a third overflow valve Y21, the oil inlet of the third overflow valve Y21 is connected to the oil inlet of the fourth two-position three-way solenoid valve YV22, and the oil outlet of the third overflow valve Y21 is connected to the oil tank 2. The B channel hydraulic module 4 also includes a fifth throttle valve L20, the oil inlet of the fifth throttle valve L20 is connected to the oil inlet of the fourth two-position three-way solenoid valve YV22, and the oil outlet of the fifth throttle valve L20 is connected to the oil tank 2. It should be noted that when the equipment is running, L20 is usually in a closed state. Because the B channel does not have a slow closing function, if the A channel is closed, the device needs to be slowly partially closed and the equipment cannot stop running, then L20 is opened to slowly drain the oil to meet the partial closing requirement.

[0046] The third hydraulic control valve assembly of the present embodiment further includes a fourth pressure switch SP21, which is disposed on the oil circuit between the working oil port of the third two-position three-way solenoid valve YV21 and the control oil port of the third cartridge valve CE21, and is connected to the fourth pressure measuring point PA21. The fourth hydraulic control valve assembly further includes a fifth pressure switch SP22 and a sixth pressure switch SP23, the fifth pressure switch SP22 is disposed on the oil circuit between the working oil port of the fourth two-position three-way solenoid valve YV22 and the control oil port of the fourth cartridge valve CE22, and is connected to the fifth pressure measuring point PA22, and the sixth pressure switch SP23 is disposed on the oil circuit between the oil inlet of the fourth two-position three-way solenoid valve YV22 and the oil inlet of the fourth cartridge valve CE22, and is connected to the sixth pressure measuring point PA23.

[0047] The oil supply module 5 of this embodiment includes a motor M, a hydraulic pump D, a second one-way valve A01, a first overflow valve Y10, a filter FYL, a first one-way valve A02 and a first throttle valve L10; the motor M is drivingly connected to the hydraulic pump D, and is used to drive the hydraulic pump D to output hydraulic oil, the oil inlet of the hydraulic pump D is connected to the oil tank 2, the oil outlet of the hydraulic pump D is connected to the second one-way valve A01, the oil outlet of the second one-way valve A01 is connected to the oil inlet of the first overflow valve Y10, the oil outlet of the first overflow valve Y10 is connected to the oil tank 2, the oil inlet of the filter FYL is connected to the oil inlet of the first overflow valve Y10, the oil outlet of the filter FYL is connected to the oil inlet of the first one-way valve A02, the oil outlet of the first one-way valve A02 is connected to the oil inlet of the first throttle valve L10, and the oil outlet of the first throttle valve L10 is respectively connected to the oil inlet of the second throttle valve L11 and the first oil port 1.4a of the rod chamber 1.4.

[0048] The present embodiment also includes an accumulator PV, which is connected to the oil circuit between the oil inlet of the A channel hydraulic module 3 and the first oil port 1.4a of the rod chamber 1.4 through a throttle valve LP1. Two pressure transmitters PT12, PT22 and a pressure gauge PI1 are also provided on the oil circuit between the oil inlet of the A channel hydraulic module 3 and the first oil port 1.4a of the rod chamber 1.4. The two pressure transmitters PT12, PT22 and the pressure gauge PI1 are connected to the oil circuit between the oil inlet of the A channel hydraulic module 3 and the first oil port 1.4a of the rod chamber 1.4 through throttle valves LP2, LP3 and LP4 respectively.

[0049] In this embodiment, the first cartridge valve CE11, the second cartridge valve CE12, the third cartridge valve CE21 and the fourth cartridge valve CE22 are all flow control cartridge valves, and the valve covers of the first cartridge valve CE11, the second cartridge valve CE12, the third cartridge valve CE21 and the fourth cartridge valve CE22 are all provided with valve core stroke regulators for adjusting the respective valve core openings. The valve core stroke regulator in this embodiment is a manual adjustment knob, and when in use, the valve quick closing time is modified by adjusting the knob.

[0050] Further explanation of the above structure:

[0051] 1. The hydraulic module of the gas-liquid linkage drive device adopts A and B completely independent dual-channel hydraulic control systems, which meet the requirements of the single failure criterion and have redundant design to ensure functional safety and reliability.

[0052] 2. Hydraulic module design: The hydraulic control is modularized and miniaturized through integrated design, and the hydraulic components are reasonably arranged on an integrated block, which reduces the pipeline connections between the hydraulic components, reduces the risk of leakage, and improves the sealing reliability of the hydraulic part; and reduces the volume, weight and structure of the hydraulic system, thereby reducing the impact on the weight and center of gravity of the whole machine.

[0053] 3. Hydraulic principle design; hydraulic control adopts two-row electric control; making the control system simple and reliable; the hydraulic system adopts an independent dual-channel hydraulic control system, with A and B channel hydraulic control systems respectively, to ensure that it meets the requirements of the single fault criterion when performing safety functions; the independent dual system structure realizes online maintenance of the whole machine; digital analog signal output function realizes online uninterrupted monitoring and intelligent control of the whole process.

[0054] 4. Control logic: Design the control logic from the aspects of safety, reliability and independence, and control the slow opening, slow closing, fast closing, partial closing and opening functions of the A channel, B channel and A+B channel of the drive device by controlling the power on and off of the motor M and the solenoid valve respectively. Ensure the control of the quick closing function of the gas-liquid linkage device in <5s under normal, abnormal and accident conditions.

[0055] 5. Electrical control design: The temperature (temperature switch TS1), pressure, liquid level, etc. of the drive device are detected and controlled by digital detection. The control function is controlled by channel A, channel B, and channel A+B respectively to ensure the safety and reliability of the drive device.

[0056] 6. According to the principle of independence of 1E-level equipment and circuits, the motor M, A channel, and B channel are set up independently, and complete physical isolation is ensured; 1E-level equipment, control cables, and connectors meet the requirements of 1E-level identification standards. They meet the requirements of nuclear power plants and can operate reliably under temperature, radiation, and earthquake environments under accident conditions.

[0057] According to the above description, the specific principle of the hydraulic control system of the gas-liquid linkage drive device of the present invention is as follows: the thrust of the gas-liquid linkage drive device comes from the energy stored in the nitrogen-filled gas storage tank (QV1, QV2). Start the hydraulic pump D, and the high-pressure oil pushes the piston 1.2 to retract and compress the nitrogen energy storage. When the quick-closing solenoid valve (the second two-position three-way solenoid valve YV12 and / or the fourth two-position three-way solenoid valve YV22) is energized, the corresponding flow control valve (the second cartridge valve CE12 and / or the fourth cartridge valve CE22) will be opened, the oil pressure will be released, and at the same time, the gas storage tank (QV1, QV2) compresses the nitrogen to push the piston 1.2 downward, thereby closing the valve. By adjusting the opening of the flow control valve (the second cartridge valve CE12 and / or the fourth cartridge valve CE22), the quick closing time can be adjusted to 1s~5s. A small pressure balance accumulator PV is installed on the hydraulic circuit to adapt to the thermal expansion of the hydraulic fluid at high temperature.

[0058] 1.2 Operation Mode

[0059] Prior to any operation, the gas-oil drive should be properly pre-charged with nitrogen.

[0060] 1.2.1 Enable

[0061] The opening time of the gas-hydraulic drive can be adjusted by the first throttle valve L10. Start the hydraulic pump D motor M, and the hydraulic oil enters the hydraulic pump D through the filter FYL. When the hydraulic oil level is too low, the level switch LS will change state.

[0062] The hydraulic oil from the hydraulic pump D enters the rod chamber 1.4 through the second check valve A01, the first check valve A02, and the filter FYL, and at the same time pushes the piston rod 1.3 upward to compress the nitrogen. At this stage, the pressure gauge PI1 displays the hydraulic oil pressure locally, and the pressure transmitters PT1 and PT2 perform remote monitoring. At the same time, the hydraulic oil enters the A channel through the first cartridge valve CE11, and applies pilot pressure to the second cartridge valve CE12 through the second two-position three-way solenoid valve YV12, closing the second cartridge valve CE12; at the same time, the hydraulic oil enters the B channel through the third cartridge valve CE21, and applies pilot pressure to the fourth cartridge valve CE22 through the fourth two-position three-way solenoid valve YV22, closing the fourth cartridge valve CE22; thereby cutting off the return oil path.

[0063] When the oil return path is closed, the system will begin to increase pressure and push the piston rod 1.3 upward until the piston rod 1.3 reaches the fully retracted position. During normal operation, the hydraulic system pressure is monitored by the pressure transmitter (PT1) and the pressure transmitter (PT2). The pressure transmitters PT12 and PT22 transmit the 4-20mA signal to the instrumentation and control system. The 4-20mA signal will be converted into the real-time pressure value in the system. According to the change of the pressure value, the start and stop of the hydraulic pump D motor (M) will be controlled by the instrumentation and control system to compensate the system pressure (based on the minimum system pressure requirement).

[0064] If the quick closing function is activated during the opening process, the gas-hydraulic drive device will close quickly within 1s to 5s.

[0065] 1.2.2 Slow Closing

[0066] During normal operation, the piston rod 1.3 of the gas-hydraulic drive device is in a fully retracted state. In this mode, the second 2-position 3-way solenoid valve YV12 of channel A and the fourth 2-position 3-way solenoid valve YV22 of channel B should remain de-energized to prevent the hydraulic oil from flowing back to the oil tank 2.

[0067] During the slow closing operation, the first two-position two-way solenoid valve YV13 and the second two-position two-way solenoid valve YV14 are energized, and the system hydraulic oil will return to the oil tank 2 through the first two-position two-way solenoid valve YV13 and the second two-position two-way solenoid valve YV14 until the piston rod 1.3 reaches the fully extended position, and then it is de-energized, and the slow closing ends. During this period, the hydraulic pump motor M is turned off to prevent the hydraulic pump D from compensating the system pressure. The slow closing time can be adjusted by the third throttle valve L12.

[0068] The slow closing function has nothing to do with safety. If the fast closing function is activated during the slow closing process, the gas-hydraulic drive device will close quickly within 1s to 5s.

[0069] 1.2.3 Quick Close 1 (Single Column Electrical Channel A)

[0070] When the A channel is quickly closed, the second two-position three-way solenoid valve YV12 is energized, and the second cartridge valve CE12 opens. The compressed nitrogen in the gas storage tank (QV1, QV2) pushes the piston 1.2 downward, and the hydraulic oil under the piston 1.2 returns to the oil tank 2 through the first cartridge valve CE11, the second cartridge valve CE12 and the oil return port Ta2. Here, the rapid return of the hydraulic oil will be diffused by the buffer HB1, and the piston rod 1.3 is quickly extended until the piston rod 1.3 reaches the fully extended position, and the A channel quick closing operation is completed.

[0071] The second cartridge valve CE12 has a manual adjustment knob, by which the user can modify the rapid closing time.

[0072] 1.2.4 Quick Close 2 (Single-row Electrical B Channel)

[0073] When the B channel is quickly closed, the fourth two-position three-way solenoid valve YV22 is energized, the fourth cartridge valve CE22 is opened, and the compressed nitrogen in the gas tank (QV1, QV2) pushes the piston 1.2 downward. The hydraulic oil under the piston 1.2 will return to the oil tank 2 through the third cartridge valve CE21 and the fourth cartridge valve CE22 and the oil return port Tb2. Here, the rapid return of the hydraulic oil will be diffused by the buffer HB2. At the same time, the piston rod 1.3 is quickly extended until the piston rod 1.3 reaches the fully extended position, and the B channel quick closing operation is completed.

[0074] The fourth cartridge valve CE22 has a manual adjustment knob, by adjusting the knob, the user can modify the fast closing time.

[0075] 1.2.5 Quick shutdown 3 (two-column A+B)

[0076] This operation mode involves quick closing 1 (channel A) + quick closing 2 (channel B) at the same time, which will result in twice the amount of oil returning to tank 2. Channel A and channel B should be used to perform safety functions simultaneously under accident conditions, but when considering a single failure of the safety-level control system (the solenoid valves powered by the same column cannot be powered), and only the solenoid valves in one column of the quick-closing channel are available, the gas-liquid linkage drive device can still achieve the quick closing function.

[0077] 1.2.6 Load test

[0078] The purpose of the on-load test is to verify the functionality of the electronic and hydraulic components required to perform the quick-closing operation. This operating mode is only used for routine diagnostic / maintenance purposes and does not affect the safety functions of the gas-hydraulic drive. Hydraulic pump D continues to operate continuously during this test. Each column channel must be tested individually to ensure that the channel not under load has the quick-closing function.

[0079] By energizing the solenoid valve YV11 (A channel) / YV21 (B channel), pilot pressure is applied to the cartridge valve CE11 / CE21 to isolate the A / B channel.

[0080] The pressure switch SP11 / SP21 gives a feedback signal indicating that there is a pilot pressure to close the cartridge valve CE11 / CE21, thereby isolating the channel from the system.

[0081] When the load test is performed, the function of the solenoid valves on the channel will be tested. By energizing and de-energizing the second two-position three-way solenoid valve YV12 of channel A, the pressure switch SP12 should change state to confirm the function of the solenoid valve. The same is true for the fourth two-position three-way solenoid valve YV22 and pressure switch SP22 of channel B. The pressure switch is also used to monitor the conversion function of the cartridge valve in the hydraulic control valve assembly.

[0082] 1.2.6.1 Load test - Channel A - CE11 / YV11

[0083] The first cartridge valve CE11 isolates channel A from the system under the action of the pilot pressure. The pilot pressure of the first cartridge valve CE11 can be monitored by the pressure switch SP11. When the first two-position three-way solenoid valve YV11 is energized, the pilot line leading to the first cartridge valve CE11 is pressurized, the pressure switch SP11 is high pressure, and the first cartridge valve CE11 is closed; when the first two-position three-way solenoid valve YV11 loses power, the pilot line loses pressure, the pressure switch SP11 is low pressure, and the first cartridge valve CE11 opens.

[0084] 1.2.6.2 Load test channel A - CE12 / YV12

[0085] During the test, the gas-hydraulic drive device should remain retracted and the hydraulic pump motor M should remain energized.

[0086] CE12 / YV12 test: The first two-position three-way solenoid valve YV11 is energized, the pressure switch SP11 is high pressure, and the first cartridge valve CE11 is closed. At this time, the second pressure switch SP12 and the third pressure switch SP13 are high pressure, so the second two-position three-way solenoid valve YV12 is energized, and the second pressure switch SP12 and the third pressure switch SP13 become low pressure, indicating that the second two-position three-way solenoid valve YV12 is energized and actuated, and the second cartridge valve CE12 changes from closed to open, indicating that the second two-position three-way solenoid valve YV12 and the second cartridge valve CE12 are effective. At the end of the test, the second two-position three-way solenoid valve YV12 is de-energized, and then the first two-position three-way solenoid valve YV11 is de-energized, and the original state before the test is restored.

[0087] 1.2.6.3 Load test - Channel B - CE21 / YV21

[0088] The third cartridge valve CE21 isolates the B channel from the system under the action of the pilot pressure. The pilot pressure of the third cartridge valve CE21 can be monitored by the pressure switch SP21. When the third two-position three-way solenoid valve YV21 is energized, the pilot line leading to the third cartridge valve CE21 is pressurized, SP21 is high pressure, and the third cartridge valve CE21 is closed; when the third two-position three-way solenoid valve YV21 loses power, the pilot line loses pressure, the fourth pressure switch SP21 is low pressure, and the third cartridge valve CE21 opens.

[0089] 1.2.6.4 Load test channel B - CE22 / YV22

[0090] During the test, the gas-hydraulic drive device should remain retracted and the hydraulic pump motor M should remain energized.

[0091] CE22 / YV22 test: The third two-position three-way solenoid valve YV21 is energized, the fourth pressure switch SP21 is high pressure, and the third cartridge valve CE21 is closed. At this time, the fifth pressure switch SP22 and the sixth pressure switch SP23 are high pressure, so that the fourth two-position three-way solenoid valve YV22 is energized, and the fifth pressure switch SP22 and the sixth pressure switch SP23 become low pressure, indicating that the fourth two-position three-way solenoid valve YV22 is energized and actuated, and the fourth cartridge valve CE22 changes from closed to open, indicating that the fourth two-position three-way solenoid valve YV22 and the fourth cartridge valve CE22 are effective. At the end of the test, the fourth two-position three-way solenoid valve YV22 is de-energized, and then the first two-position three-way solenoid valve YV11 is de-energized to restore the original state before the test.

[0092] 1.2.7 10% Slow Close, Open

[0093] In normal use, the gas-hydraulic drive will remain in the open state for a long time. In order to keep the piston 1.2 seal lubricated and verify the mechanical operation of the gas-hydraulic drive, it is necessary to perform a partial closing function.

[0094] When slow closing, the slow closing can be started by energizing the first two-position two-way solenoid valve YV13 and the second two-position two-way solenoid valve YV14. When the 10% closing stroke position is reached, the slow closing function is stopped. When opening, the first two-position two-way solenoid valve YV13 and the second two-position two-way solenoid valve YV14 are powered off, and the hydraulic pump motor M is turned on. When the piston 1.2 returns to the fully open state, the 10% opening and closing test is completed.

[0095] Compared with the prior art, the beneficial effects of this embodiment are as follows: this embodiment can realize the control of slow opening, slow closing and fast closing of the gas-liquid linkage drive device with large thrust and long stroke; the two-stage electrical system makes the control simple and reliable. The slow opening time is less than 480s, the slow closing time is less than 180s, and the fast closing time is less than 5s; the hydraulic module is integrated, and the fast closing part adopts pilot control. When the pilot solenoid valve is not energized, the reliable operation of the gas-liquid linkage drive device is guaranteed; when the pilot solenoid valve is energized, the safe and fast closing of the gas-liquid linkage drive device is guaranteed. The online detection function, through the different logic control of the solenoid valve, the pressure switch can judge the fault or state of the control solenoid valve or the main valve online, so as to carry out online replacement or maintenance to ensure the normal operation of the equipment; the fast closing drive device solves the technical issues of earthquake resistance, noise, aging, radiation resistance, electromagnetic compatibility, safety and reliability. It ensures that the gas-liquid linkage drive device meets the normal, abnormal, and accident conditions <5s fast closing capability, and reliable operation under severe accident conditions such as damp heat, radiation, earthquake and power failure.

[0096] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic control system for a gas-liquid linkage drive device, characterized in that: The gas-liquid linkage drive device includes a gas-liquid linkage cylinder, which includes a rod chamber and a rodless chamber. The rod chamber of the gas-liquid linkage cylinder is respectively provided with a first oil port and a second oil port, and the rodless chamber of the gas-liquid linkage cylinder is filled with compressed gas; the hydraulic control system includes a channel A hydraulic module, a channel B hydraulic module and an oil supply module; the oil inlet of the oil supply module is connected to the oil tank, the oil discharge port of the oil supply module is connected to the oil inlet of the channel A hydraulic module, and the oil return port of the channel A hydraulic module is connected to the oil tank; the first oil port of the rod chamber is connected to the The oil inlet of the A channel hydraulic module is connected, the second oil port of the rod chamber is connected to the oil inlet of the B channel hydraulic module, and the oil return port of the B channel hydraulic module is connected to the oil tank; the oil supply module provides hydraulic oil to the rod chamber of the gas-liquid linkage cylinder, the rod chamber increases the oil pressure, the volume of the rod chamber increases, the volume of the rodless chamber decreases, and the compressed gas in the rodless chamber stores energy; the A channel hydraulic module and / or the B channel hydraulic module are turned on, the oil pressure in the rod chamber is released, the volume of the rod chamber decreases, the compressed gas in the rodless chamber releases energy, the volume of the rodless chamber increases, and the volume of the rod chamber decreases; The A channel hydraulic module comprises a first hydraulically controlled valve assembly, a second hydraulically controlled valve assembly and a solenoid valve assembly; the oil inlet of the first hydraulically controlled valve assembly is respectively connected to the first oil port of the rod chamber and the oil outlet of the oil supply module, the oil outlet of the first hydraulically controlled valve assembly is connected to the oil inlet of the second hydraulically controlled valve assembly, and the oil outlet of the second hydraulically controlled valve assembly is connected to the oil tank; the oil inlet of the solenoid valve assembly is connected to the oil inlet of the second hydraulically controlled valve assembly, and the oil outlet of the solenoid valve assembly is connected to the oil tank; The first hydraulic control valve assembly comprises a first two-position three-way solenoid valve and a first cartridge valve; the oil inlet of the first two-position three-way solenoid valve is respectively connected to the first oil port of the rod chamber and the oil discharge port of the oil supply module, the oil return port of the first two-position three-way solenoid valve is connected to the oil tank, the working oil port of the first two-position three-way solenoid valve is connected to the control oil port of the first cartridge valve, and the oil inlet of the first cartridge valve is connected to the oil inlet of the first two-position three-way solenoid valve; The second hydraulic control valve assembly comprises a second two-position three-way solenoid valve and a second cartridge valve, the oil outlet of the first cartridge valve is communicated with the oil inlet of the second two-position three-way solenoid valve, the oil return port of the second two-position three-way solenoid valve is communicated with the oil tank, the working oil port of the second two-position three-way solenoid valve is communicated with the control oil port of the second cartridge valve, the oil inlet of the second cartridge valve is communicated with the oil inlet of the second two-position three-way solenoid valve, and the oil outlet of the second cartridge valve is communicated with the oil tank; The solenoid valve assembly comprises a first two-position two-way solenoid valve, a second two-position two-way solenoid valve and a third throttle valve, the oil inlet of the first two-position two-way solenoid valve is communicated with the oil inlet of the second cartridge valve, the oil outlet of the first two-position two-way solenoid valve is communicated with the oil inlet of the second two-position two-way solenoid valve, the oil outlet of the second two-position two-way solenoid valve is communicated with the oil inlet of the third throttle valve, and the oil outlet of the third throttle valve is communicated with the oil tank; The first hydraulic control valve assembly further includes a first pressure switch, which is arranged in the oil circuit between the working oil port of the first two-position three-way solenoid valve and the control oil port of the first cartridge valve; The second hydraulic control valve assembly further includes a second pressure switch and a third pressure switch, wherein the second pressure switch is arranged on the oil circuit between the working oil port of the second two-position three-way solenoid valve and the control oil port of the second cartridge valve, and the third pressure switch is arranged on the oil circuit between the oil inlet of the second two-position three-way solenoid valve and the oil inlet of the second cartridge valve; the first cartridge valve and the second cartridge valve are both flow control cartridge valves, and valve core travel regulators are arranged on the valve covers of the first cartridge valve and the second cartridge valve for adjusting the respective valve core openings; The B channel hydraulic module comprises a third hydraulic control valve assembly and a fourth hydraulic control valve assembly, the oil inlet of the third hydraulic control valve assembly is communicated with the second oil port of the rod chamber, the oil outlet of the third hydraulic control valve assembly is communicated with the oil inlet of the fourth hydraulic control valve assembly, and the oil outlet of the fourth hydraulic control valve assembly is communicated with the oil tank; The third hydraulic control valve assembly comprises a third two-position three-way solenoid valve and a third cartridge valve; the oil inlet of the third two-position three-way solenoid valve is connected to the second oil port of the rod chamber, the oil return port of the third two-position three-way solenoid valve is connected to the oil tank, and the working oil port of the third two-position three-way solenoid valve is connected to the control oil port of the third cartridge valve; The fourth hydraulic control valve assembly includes a fourth two-position three-way solenoid valve and a fourth cartridge valve; the oil outlet of the third cartridge valve is connected to the oil inlet of the fourth two-position three-way solenoid valve, the oil return port of the fourth two-position three-way solenoid valve is connected to the oil tank, the working oil port of the fourth two-position three-way solenoid valve is connected to the control oil port of the fourth cartridge valve, the oil inlet of the fourth cartridge valve is connected to the oil inlet of the fourth two-position three-way solenoid valve, and the oil outlet of the fourth cartridge valve is connected to the oil tank; The third hydraulic control valve assembly further includes a fourth pressure switch, which is arranged in the oil circuit between the working oil port of the third two-position three-way solenoid valve and the control oil port of the third cartridge valve; The fourth hydraulic control valve assembly further includes a fifth pressure switch and a sixth pressure switch, the fifth pressure switch being arranged on the oil circuit between the working oil port of the fourth two-position three-way solenoid valve and the control oil port of the fourth cartridge valve, and the sixth pressure switch being arranged on the oil circuit between the oil inlet of the fourth two-position three-way solenoid valve and the oil inlet of the fourth cartridge valve; The third cartridge valve and the fourth cartridge valve are both flow control cartridge valves, and valve core stroke regulators are provided on the valve covers of the third cartridge valve and the fourth cartridge valve for adjusting the respective valve core openings; The oil supply module includes a motor, a hydraulic pump, a first relief valve and a first check valve; the motor is drivingly connected to the hydraulic pump and is used to drive the hydraulic pump to output hydraulic oil, the oil inlet of the hydraulic pump is connected to the oil tank, the oil outlet of the hydraulic pump is connected to the oil inlet of the first relief valve, the oil outlet of the first relief valve is connected to the oil tank, the oil inlet of the first check valve is connected to the oil inlet of the first relief valve, and the oil outlet of the first check valve is connected to the oil inlet of the A channel hydraulic module; A second one-way valve is provided on the oil circuit between the first relief valve and the hydraulic pump, the oil inlet of the second one-way valve is communicated with the oil outlet of the hydraulic pump, and the oil outlet of the second one-way valve is communicated with the oil inlet of the first relief valve; a filter is provided on the oil circuit between the first one-way valve and the first relief valve, the oil inlet of the filter is communicated with the oil inlet of the first relief valve, and the oil outlet of the filter is communicated with the oil inlet of the first one-way valve; A first throttle valve is arranged on the oil circuit between the first one-way valve and the oil inlet of the A-channel hydraulic module, the oil inlet of the first throttle valve is connected with the oil outlet of the first one-way valve, and the oil outlet of the first throttle valve is respectively connected with the oil inlet of the A-channel hydraulic module and the first oil port of the rod chamber.

2. The hydraulic control system of the gas-liquid linkage drive device according to claim 1, characterized in that: The first hydraulic control valve assembly also includes a second throttle valve, the oil inlet of the second throttle valve is respectively connected to the first oil port of the rod chamber and the oil discharge port of the oil supply module, and the oil outlet of the second throttle valve is connected to the oil inlet of the first two-position three-way solenoid valve; the A channel hydraulic module also includes a second overflow valve, the oil inlet of the second overflow valve is connected to the oil inlet of the second two-position three-way solenoid valve, and the oil outlet of the second overflow valve is connected to the oil tank.

3. The hydraulic control system of the gas-liquid linkage drive device according to claim 1, characterized in that: The third hydraulic control valve assembly further comprises a fourth throttle valve, the oil inlet of the fourth throttle valve is communicated with the second oil port of the rod chamber, and the oil outlet of the fourth throttle valve is communicated with the oil inlet of the third two-position three-way solenoid valve; The B channel hydraulic module further comprises a third relief valve, an oil inlet of the third relief valve is communicated with an oil inlet of the fourth two-position three-way solenoid valve, and an oil outlet of the third relief valve is communicated with an oil tank; The B channel hydraulic module also includes a fifth throttle valve, an oil inlet of the fifth throttle valve is connected to the oil inlet of the fourth two-position three-way solenoid valve, and an oil outlet of the fifth throttle valve is connected to the oil tank.

4. The hydraulic control system of the gas-liquid linkage drive device according to claim 1, characterized in that: A piston and a piston rod are arranged in the rod chamber, one end of the piston rod is connected to the piston, and the other end of the piston rod extends out of the rod chamber; the rodless chamber is connected to an air storage device, and the air storage device is two air storage tanks arranged in parallel; the rodless chamber is respectively connected to two pressure transmitters, a pressure gauge and an inflation valve through pipelines, a throttle valve is arranged on the pipeline between each pressure transmitter and the rodless chamber, and a throttle valve is arranged on the pipeline between the pressure gauge and the rodless chamber and on the pipeline between the inflation valve and the rodless chamber.

5. The hydraulic control system of the gas-liquid linkage drive device according to claim 1, characterized in that: It also includes an accumulator, which is connected to the oil circuit between the oil inlet of the A channel hydraulic module and the first oil port of the rod chamber through a throttle valve. Two pressure transmitters and a pressure gauge are also arranged on the oil circuit between the oil inlet of the A channel hydraulic module and the first oil port of the rod chamber. The two pressure transmitters and the pressure gauge are respectively connected to the oil circuit between the oil inlet of the A channel hydraulic module and the first oil port of the rod chamber through a throttle valve.

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