Underwater large-depth equal-pressure test device based on land environment

Abstract

The application discloses a kind of underwater large-depth equal-pressure test device based on land environment, it is related to ship and ocean engineering field, including pipeline system and with the control system being connected with pipeline system, the pipeline system includes simulation compensator injection water and air drainage subsystem, gas charging and discharging subsystem, pressure compensation subsystem, pressure measurement subsystem, simulation container, inflatable container, simulation compensator, compressed gas cylinder and water circulation subsystem, the water circulation subsystem includes water receiving tank and water pump;The simulation compensator injection water and air drainage subsystem is used to inject water and air drainage to simulation compensator;The gas charging and discharging subsystem is used to adjust the pressure inside inflatable container;This underwater large-depth equal-pressure test device based on land environment can carry out underwater large-depth equal-pressure test of large container, is high in safety, short in time, is favorable to the cultivation and training of test operation skill, is convenient for artificial setting fault and carries out fault emergency disposal test.

Description

Technical Field

[0001] This invention relates to shipbuilding and marine engineering technology, and more specifically to an underwater deep-sea pressure equalization test device based on a terrestrial environment. Background Technology

[0002] Opening the lid of a large container at a depth of tens of meters underwater requires overcoming immense water pressure. If it's necessary to prevent water from immediately entering the container after opening, a diaphragm is needed at the inlet to isolate the contents from the water. Once opened, this diaphragm is directly exposed to water pressure. To reduce opening resistance and prevent the diaphragm from rupturing, an underwater pressure equalization device is required. This is typically achieved by injecting gas at a certain pressure into the container, maintaining the pressure inside the container at the same level as the water pressure at the lid, or ensuring the difference is within a certain range. As the container's depth changes, the pressure inside must also change accordingly. Pressure sensors are installed on the container walls to measure and monitor pressure changes in real time. The cavity between the diaphragm and the lid is pre-filled with water, as the volume of this cavity is constant, and the water pressure on the diaphragm's surface is also constant. Pressure sensors are also installed near the diaphragm's surface. In order to maintain pressure balance on the upper and lower surfaces of the diaphragm, the pressure on the upper surface of the diaphragm needs to be adjusted in a certain way so that the pressure on the upper surface of the diaphragm can change with the pressure inside the container, and the pressure inside the container can change with the depth of the container in the water, thereby achieving a dynamic balance of pressure at three points.

[0003] To achieve the aforementioned pressure equalization process and control requirements, numerous pipelines, valves, and pressure sensors are installed on the container walls and lid. An air source and pressure pump station are located outside the container to control and complete tasks such as water injection into the cavity between the diaphragm and the lid, air filling and releasing within the container, and pressure regulation of the diaphragm's upper surface. Due to the wide variety and distribution of components, the high sealing requirements of pipelines and valves, the high air source pressure, and the complex valve structures and short switching response times, the principle and implementation of pressure equalization in an underwater environment are quite complex. The operation involves numerous steps and carries certain risks, requiring operators to have a deep understanding of the pressure equalization principle, memorize the operating procedures, and master emergency response methods.

[0004] Currently, conducting large-scale underwater pressure equalization tests on containers in real underwater environments is costly, time-consuming, and involves high risks in verifying and exploring test boundary conditions. It also requires stringent operating conditions, hinders the development and training of test operation skills, and makes it inconvenient to artificially set faults for emergency response tests. Therefore, this proposal suggests an underwater pressure equalization test device based on a terrestrial environment. Summary of the Invention

[0005] The purpose of this invention is to provide an underwater deep-sea pressure equalization test device based on a terrestrial environment, so as to overcome the above-mentioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an underwater deep-sea pressure equalization test device based on a terrestrial environment, comprising a pipeline system and a control system connected to the pipeline system. The pipeline system includes a simulated compensator water injection and drainage system, a gas filling and discharging subsystem, a pressure compensation subsystem, a pressure measurement subsystem, a simulated container, a gas filling container, a simulated compensator, a compressed gas cylinder, and a water circulation subsystem. The water circulation subsystem includes a water receiving tank and a water pump.

[0007] The simulated compensator water injection and drainage system is used for injecting and draining water from the simulated compensator.

[0008] The inflation / deflation system is used to regulate the pressure inside the inflation container.

[0009] The pressure compensation subsystem is used to ensure the balance between the internal pressure of the simulation compensator and the internal pressure of the inflation container.

[0010] The pressure measurement subsystem is used to measure the pressure of the simulated compensator and the inflation container in real time.

[0011] The compressed gas cylinder is used to supply gas to the pressure compensation subsystem and the gas filling and discharging subsystem of the gas filling container;

[0012] The control system includes an integrated control unit and a pressure equalization monitoring box. The integrated control unit is used to send control commands to the pressure equalization monitoring box, and the pressure equalization monitoring box receives the control commands from the integrated control unit to control the pipeline system and collects relevant information of the pipeline system to feed back to the integrated control unit.

[0013] Furthermore, the inflatable container is installed inside the simulation container, and the volume of the inflatable container is 0.02 m³. 3 The pressure resistance is greater than 0.3 MPa, and the inflation container is connected to the inflation / deflation subsystem, the pressure compensation subsystem, and the pressure measurement subsystem, respectively.

[0014] Furthermore, the volume of the simulated compensator is 0.04m³. 3 Furthermore, the pressure resistance is greater than 0.3 MPa, and a water level sensor is installed on the inner wall of one side of the simulated compensator to monitor the water level inside the simulated compensator.

[0015] Furthermore, the simulated compensator water injection and drainage system includes a water injection pipeline, a drainage pipeline, a water injection venting pipeline, and a valve group. The water injection pipeline is installed between the water receiving tank and the simulated compensator, and is connected to the water receiving tank via a water pump. The drainage pipeline is installed on the water injection pipeline and connected to the water receiving tank. A fifth manual ball valve and a ninth solenoid valve are installed on the drainage pipeline. The water injection venting pipeline is installed on the top of the simulated compensator and is connected to a first solenoid valve. The valve group includes a first manual ball valve, a second solenoid valve, and a second manual ball valve installed on the water injection pipeline.

[0016] Furthermore, the simulated compensator water injection and drainage system also includes a first gravity flow pipeline connected to the water injection pipeline, a third manual ball valve installed on the first gravity flow pipeline, a second gravity flow pipeline connected to the water injection pipeline, and a twelfth solenoid valve and a fourth manual ball valve installed on the second gravity flow pipeline, wherein the second solenoid valve is located between the first gravity flow pipeline and the second gravity flow pipeline.

[0017] Furthermore, the inflation / deflation system includes a shut-off valve installed at the output end of the compressed gas cylinder and an inflation pipeline installed at the output end of the shut-off valve. The inflation pipeline is equipped with an air filter, a first pressure reducing valve, a second pressure reducing valve, a sixth manual ball valve, and a third solenoid valve. The output end of the inflation pipeline is split into two branches connected to the simulated container. The two branches of the inflation pipeline output end are respectively equipped with a fourth solenoid valve and a fifth solenoid valve. The ends of the two branches of the inflation pipeline output end are merged into one branch and connected to the inflation container. The fourth and fifth solenoid valves are connected to an inflation pipeline, and an inflation valve is installed on the inflation pipeline.

[0018] Furthermore, the pressure compensation subsystem includes a tenth solenoid valve and an eleventh solenoid valve connected to the inflation pipeline. The inflation pipeline is connected to the simulated compensator via a seventh manual ball valve. The pressure compensation subsystem also includes an exhaust pipeline installed on the top of the simulated compensator, an eighth manual ball valve installed on the exhaust pipeline, and a sixth solenoid valve. A water guide pipeline is connected to the bottom of the simulated compensator, and a ninth manual ball valve is connected to the water guide pipeline. The water guide pipeline is connected to a water receiving tank.

[0019] Furthermore, the pressure measurement subsystem includes a first pressure measurement pipeline connected to the analog compensator and a seventh solenoid valve installed on the first pressure measurement pipeline. The output end of the first pressure measurement pipeline is divided into two paths. One path of the first pressure measurement pipeline is connected to a first pressure sensor, and the other path of the first pressure measurement pipeline is connected to a water receiving tank through a tenth manual ball valve. The pressure measurement subsystem also includes a second pressure measurement pipeline connected to the inflation container, an eighth solenoid valve installed on the second pressure measurement pipeline, and a second pressure sensor installed at the output end of the second pressure measurement pipeline.

[0020] Furthermore, the control unit includes an all-in-one computer, a keyboard, and a mouse.

[0021] Furthermore, the equalizing monitoring box includes a network switch, a relay control module, an IO acquisition module, an AD conversion module, and a power supply module.

[0022] Compared with existing technologies, the present invention provides an underwater deep-sea pressure equalization test device based on a terrestrial environment, which can simulate the underwater environment to conduct deep-sea pressure equalization tests on large containers. It is highly safe, short in time, conducive to the cultivation and training of test operation skills, and convenient for artificially setting faults to conduct emergency response tests. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the pipeline system of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the integrated control unit of the present invention.

[0026] Figure 3 This is a block diagram illustrating the overall structural principle of the equalizing pressure monitoring box of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Simulated container; 2. Inflatable container; 3. Simulated compensator; 4. Compressed gas cylinder; 5. First pressure sensor; 6. Second pressure sensor; 7. Third pressure sensor; 8. Twelfth solenoid valve; 9. Thirteenth solenoid valve; 10. Second solenoid valve; 11. Ninth solenoid valve; 12. Fourth solenoid valve; 13. Fifth solenoid valve; 14. Vent valve; 15. Third solenoid valve; 16. Sixth solenoid valve; 17. First solenoid valve; 18. Tenth solenoid valve; 19. 11. Solenoid valve; 20. Solenoid valve 7; 21. Solenoid valve 8; 22. Manual ball valve 1; 23. Manual ball valve 5; 24. Manual ball valve 2; 25. Manual ball valve 8; 26. Manual ball valve 7; 27. Manual ball valve 6; 28. Manual ball valve 9; 29. ​​Manual ball valve 10; 30. Manual ball valve 4; 31. Manual ball valve 3; 32. Shut-off valve; 33. First pressure reducing valve; 34. Second pressure reducing valve; 36. Air filter. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Please see Figure 1-3 An underwater deep-sea pressure equalization test device based on a terrestrial environment includes a pipeline system and a control system connected to the pipeline system. The pipeline system includes a simulated compensator water injection system, a gas filling and discharging subsystem, a pressure compensation subsystem, a pressure measurement subsystem, a simulated container 1, a gas filling container 2, a simulated compensator 3, a compressed gas cylinder 4, and a water circulation subsystem. The water circulation subsystem includes a water tank and a water pump. The compressed gas cylinder 4 is used to supply gas to the pressure compensation subsystem and the gas filling and discharging subsystem of the gas filling container 2. The simulated container 1 is designed according to the scale of the actual container, and corresponding pipeline openings are set at appropriate positions on the cylinder wall. The simulated compensator 3 replaces the space between the diaphragm and the container lid of the simulated container 1, and establishes pressure inside it. By comparing the pressure inside the gas filling container 2, the opening and closing of the corresponding solenoid valve on the simulated compensator 3 is controlled to keep the pressure values ​​of the two balanced.

[0031] The main function of compressed gas cylinder 4 is to supply gas to the pressure compensation subsystem and the gas filling and discharging subsystem. At the same time, in order to facilitate the filling of compressed gas cylinder, a corresponding filling port is provided on the gas cylinder outlet pipeline.

[0032] Inflatable container 2 is installed inside simulated container 1, and the volume of inflatable container 2 is 0.02 m³. 3 And the pressure resistance is greater than 0.3MPa. The inflation container 2 is connected to the inflation / deflation subsystem, the pressure compensation subsystem and the pressure measurement subsystem respectively.

[0033] The volume of the simulated compensator 3 is 0.04 m³. 3 Furthermore, the pressure resistance is greater than 0.3MPa. A water level sensor is installed on the inner wall of one side of the simulated compensator 3 to monitor the water level inside the simulated compensator 3.

[0034] The simulated compensator water injection and drainage system is used to inject water into and drain water from the simulated compensator 3. The simulated compensator water injection and drainage system includes a water injection pipeline, a drainage pipeline, a water injection vent pipeline, and a valve group. The water injection pipeline is installed between the water receiving tank and the simulated compensator 3. The water injection pipeline is connected to the water receiving tank through a water pump. The drainage pipeline is installed on the water injection pipeline and connected to the water receiving tank. A fifth manual ball valve 23 and a ninth solenoid valve 11 are installed on the drainage pipeline. The water injection vent pipeline is installed on the top of the simulated compensator 3 and is connected to a first solenoid valve 17. The valve group includes a first manual ball valve 22, a second solenoid valve 10, and a second manual ball valve 24 installed on the water injection pipeline.

[0035] The simulated compensator water injection and drainage system also includes a first gravity flow pipeline connected to the water injection pipeline, a third manual ball valve 31 installed on the first gravity flow pipeline, a second gravity flow pipeline connected to the water injection pipeline, and a twelfth solenoid valve 8 and a fourth manual ball valve 30 installed on the second gravity flow pipeline. The second solenoid valve 10 is located between the first gravity flow pipeline and the second gravity flow pipeline.

[0036] In order to achieve the function of adjusting the pressure inside the inflation container 2 and ensure that the pressure inside the inflation container 2 matches the pressure at the bottom of the simulated container 1 at different water depths set on the control unit, the inflation and deflation subsystem is used to adjust the pressure inside the inflation container 2. The inflation and deflation system includes a shut-off valve 32 installed at the output end of the compressed gas cylinder 4 and an inflation pipeline installed at the output end of the shut-off valve 32. An air filter 36, a first pressure reducing valve 33, a second pressure reducing valve 34, a sixth manual ball valve 27 and a third solenoid valve 15 are installed on the inflation pipeline. The output end of the inflation pipeline is divided into two paths and connected to the simulated container 1. The two paths at the output end of the inflation pipeline are respectively equipped with a fourth solenoid valve 12 and a fifth solenoid valve 13. The ends of the two paths at the output end of the inflation pipeline are merged into one path and connected to the inflation container 2. A deflation pipeline is connected to the fourth solenoid valve 12 and the fifth solenoid valve 13, and a deflation valve 14 is installed on the deflation pipeline.

[0037] In order to realize the active pressure adjustment function of the simulated compensator 3, the pressure compensation subsystem is used to ensure the balance between the internal pressure of the simulated compensator 3 and the internal pressure of the inflation container 2. The pressure compensation subsystem includes the tenth solenoid valve 18 and the eleventh solenoid valve 19 connected to the inflation pipeline. The inflation pipeline is connected to the simulated compensator 3 through the seventh manual ball valve 26. The pressure compensation subsystem also includes the exhaust pipeline installed on the top of the simulated compensator 3, the eighth manual ball valve 25 and the sixth solenoid valve 16 installed on the exhaust pipeline. The bottom of the simulated compensator 3 is connected to the water guide pipeline, and the ninth manual ball valve 28 is connected to the water guide pipeline. The water guide pipeline is connected to the water receiving tank.

[0038] To achieve pressure balance among the simulated compensator 3, the air-filled container 2, and the simulated container 1 at different water depths, it is necessary to measure the pressure of the simulated compensator 3 and the air-filled container 2 in real time. The pressure measurement subsystem is used to measure the pressure of the simulated compensator 3 and the air-filled container 2 in real time. The pressure measurement subsystem includes a first pressure measurement pipeline connected to the simulated compensator 3 and a seventh solenoid valve 20 installed on the first pressure measurement pipeline. The output end of the first pressure measurement pipeline is divided into two paths. One path of the first pressure measurement pipeline is connected to the first pressure sensor 5, and the other path of the first pressure measurement pipeline is connected to the water tank through the tenth manual ball valve 29. The pressure measurement subsystem also includes a second pressure measurement pipeline connected to the air-filled container 2, an eighth solenoid valve 21 installed on the second pressure measurement pipeline, and a second pressure sensor 6 installed at the output end of the second pressure measurement pipeline. The simulated water pressure signal is set on the control panel. The simulated water pressure measurement pipeline is only for demonstration purposes and is connected to the third pressure sensor 7 through the thirteenth solenoid valve 9.

[0039] The control system includes an integrated control unit and a pressure equalization monitoring box. The integrated control unit includes a computer, keyboard, and mouse. The pressure equalization monitoring box includes a network switch, relay control module, I / O acquisition module, AD conversion module, and power supply module. The integrated control unit receives instructions from the test personnel, sends control instructions for each solenoid valve in the test device to the pressure equalization monitoring box, receives feedback from the pressure equalization monitoring box on the on / off status of each solenoid valve and the measurement information of each pressure sensor, displays the working status of the test device, and runs the pressure equalization test control process. The pressure equalization monitoring box receives control instructions from the integrated control unit to control each solenoid valve in the test device, collects information such as the on / off status of each solenoid valve, the measurement information of each pressure sensor, and the device operating status, and feeds it back to the integrated control unit. In addition, the control system also includes software functions, which are as follows: displaying the actual position signals of each solenoid valve in the test device, the actual measured pressure of the space between the container diaphragm and the container lid, and the pressure signal inside the inflation container; allowing the test personnel to control each solenoid valve of the test device individually; receiving instructions from the test personnel and automatically executing the pressure equalization process; having real-time monitoring and alarm functions for the test device; and having a pressure equalization principle demonstration function.

[0040] Working principle: Pressure equalization test process: According to the different stages of pressure equalization, the pressure equalization test device is controlled by controlling the relevant actuators to ensure that the pressure equalization test device operates according to the prescribed procedure, so as to test and verify the water injection pressure equalization control process; 1. Self-inspection stage workflow: In the self-inspection stage, the main tasks are to complete the equipment self-inspection and the detection of the relevant actuators of the test device, (1) Equipment self-inspection: including the relay control module, IO acquisition module, AD conversion module inspection, etc.; (2) Solenoid valve actual operation check; 2. Simulation compensator 3 Water injection stage workflow: Open the seventh solenoid valve 20, the first solenoid valve 17, and the second solenoid valve 10 in sequence, without actual water injection, to simulate full water; 3. Pressure equalization test Stage Workflow: (1) After the test personnel activate the equalization control command, they sequentially open the thirteenth solenoid valve 9, the eighth solenoid valve 21, the fourth solenoid valve 12, and the fifth solenoid valve 13; (2) Simulate the inflation process of the compensator 3, and follow the principle of "the pressure inside the inflation container 2 follows the simulated water pressure, and the pressure inside the simulated compensator 3 follows the pressure inside the inflation container 2" to simulate and control the pressure in the upper and lower chambers of the diaphragm. The pressure changes are highlighted in key stages (such as extending the time of the simulated negative pressure process when the water is full, and simulating the pressure change process when the pressure tapping pipeline is drained); 4. System Recovery: After the equalization test is completed, the test personnel activate the device recovery control command and restore the test device to its initial state, and close all solenoid valves;

[0041] Actual pressure equalization process: According to the different stages of pressure equalization, the pressure equalization test device is controlled to ensure that the pressure equalization test device operates according to the prescribed procedure; 1. Self-inspection stage process: In the self-inspection stage, the main tasks are to complete the equipment self-inspection and the testing of the relevant actuators of the test device: (1) Equipment self-inspection: including the relay control module, IO acquisition module, AD conversion module inspection, etc.; (2) Solenoid valve actual operation check; 2. Simulated compensator water filling stage process: (1) Open the seventh solenoid valve 20, and the control program of the control unit determines whether "the simulated compensator is full of water". If it is full of water, the pressure equalization is directly executed. Procedure; (2) If the water is not full, the test personnel shall issue a water injection command to the simulated compensator 3, and the program shall open the first solenoid valve 17 and the second solenoid valve 10 in sequence; during the water injection process, the pressure inside the simulated compensator 3 shall be monitored. When the pressure is greater than the set threshold, an alarm shall be triggered and the second solenoid valve 10 and the first solenoid valve 17 shall be closed; when the water level reaches the position with the water level sensor, the second solenoid valve 10 and the first solenoid valve 17 shall be closed in sequence, and the pressure protection program of the simulated compensator 3 shall be started at the same time. When the pressure difference between the simulated compensator 3 and the air filling container 2 is lower than the control threshold, the simulated compensator 3 shall be automatically replenished with air. When the pressure difference between the two is greater than the control threshold, the simulated compensator 3 shall be automatically replenished with air. 3. Pressure equalization stage workflow: (1) After the test personnel open the pressure equalization control command, the thirteenth solenoid valve 9, the eighth solenoid valve 21, the third solenoid valve 15, the fourth solenoid valve 12, and the fifth solenoid valve 13 are opened in sequence to start filling the air container 2 with air, and at the same time, the simulated compensator 3 is started to equalize the pressure; (2) During the process of filling the air container 2 with air, if the pressure measured in real time is higher than the set value, the air filling will be automatically stopped; thereafter, the pressure of the air container 2 and the simulated compensator 3 will be automatically controlled in accordance with the principle of "the pressure in the air container 2 follows the simulated water pressure, and the pressure in the simulated compensator 3 follows the pressure in the air container 2". When the absolute value of the pressure difference between the two is greater than the control threshold, the relevant solenoid valves are opened and closed; 4. Depressurization stage workflow: After the test personnel open the depressurization control command, the program automatically sets the simulated water pressure to 0, and the test device automatically completes the depressurization of the air-filled container 2 and the simulated compensator 3 according to the program; 5. Drainage stage workflow: (1) After the test personnel open the drainage control command, the test personnel manually and slowly open the ninth manual ball valve 28 to start draining the water in the simulated compensator 2; (2) Manually observe the drainage situation; (3) After the test personnel open the drainage completion command, stop the drainage process, the test device returns to the initial state, and closes all solenoid valves.

[0042] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An underwater deep-sea pressure equalization test device based on a terrestrial environment, comprising a piping system and a control system connected to the piping system, characterized in that, The pipeline system includes a simulated compensator water injection system, a gas filling and releasing system, a pressure compensation system, a pressure measurement system, a simulated container (1), a gas filling container (2), a simulated compensator (3), a compressed gas cylinder (4), and a water circulation system. The water circulation system includes a water receiving tank and a water pump. The simulated compensator water injection and drainage system is used to inject water into and drain water from the simulated compensator (3); The inflation / deflation system is used to regulate the pressure inside the inflation container (2); The pressure compensation subsystem is used to ensure the balance between the internal pressure of the simulation compensator (3) and the internal pressure of the inflation container (2); The pressure measurement subsystem is used to measure the pressure of the analog compensator (3) and the inflation container (2) in real time. The compressed gas cylinder (4) is used to supply gas to the pressure compensation subsystem and the filling and discharging subsystem of the filling container (2); The control system includes an integrated control unit and a pressure equalization monitoring box. The integrated control unit is used to send control commands to the pressure equalization monitoring box, and the pressure equalization monitoring box receives the control commands from the integrated control unit to control the pipeline system and collects relevant information of the pipeline system to feed back to the integrated control unit.

2. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 1, characterized in that, The inflation container (2) is installed inside the simulation container (1). The inflation container (2) has a volume of 0.02 m³ and a pressure greater than 0.3 MPa. The inflation container (2) is connected to the inflation / deflation subsystem, the pressure compensation subsystem, and the pressure measurement subsystem, respectively.

3. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 1, characterized in that, The simulated compensator (3) has a volume of 0.04 m³ and a pressure greater than 0.3 MPa. A water level sensor is installed on the inner wall of one side of the simulated compensator (3) to monitor the water level inside the simulated compensator (3).

4. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 1, characterized in that, The simulated compensator water injection and drainage system includes a water injection pipeline, a drainage pipeline, a water injection and venting pipeline, and a valve group. The water injection pipeline is installed between the water receiving tank and the simulated compensator (3). The water injection pipeline is connected to the water receiving tank via a water pump. The drainage pipeline is installed on the water injection pipeline and connected to the water receiving tank. A fifth manual ball valve (23) and a ninth solenoid valve (11) are installed on the drainage pipeline. The water injection and venting pipeline is installed on the top of the simulated compensator (3) and connected to a first solenoid valve (17). The valve group includes a first manual ball valve (22), a second solenoid valve (10), and a second manual ball valve (24) installed on the water injection pipeline.

5. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 4, characterized in that, The simulated compensator water injection and drainage system also includes a first gravity flow pipeline connected to the water injection pipeline, a third manual ball valve (31) installed on the first gravity flow pipeline, a second gravity flow pipeline connected to the water injection pipeline, and a twelfth solenoid valve (8) and a fourth manual ball valve (30) installed on the second gravity flow pipeline. The second solenoid valve (10) is located between the first gravity flow pipeline and the second gravity flow pipeline.

6. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 1, characterized in that, The gas filling and discharging system includes a shut-off valve (32) installed at the output end of the compressed gas cylinder (4) and a gas filling pipeline installed at the output end of the shut-off valve (32). An air filter (36), a first pressure reducing valve (33), a second pressure reducing valve (34), a sixth manual ball valve (27), and a third solenoid valve (15) are installed on the gas filling pipeline. The output end of the gas filling pipeline is divided into two paths and connected to the simulation container (1). The two paths at the output end of the gas filling pipeline are respectively equipped with a fourth solenoid valve (12) and a fifth solenoid valve (13). The ends of the two paths at the output end of the gas filling pipeline are merged into one path and connected to the gas filling container (2). A gas venting pipeline is connected to the fourth solenoid valve (12) and the fifth solenoid valve (13). A gas venting valve (14) is installed on the gas venting pipeline.

7. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 6, characterized in that, The pressure compensation subsystem includes a tenth solenoid valve (18) and an eleventh solenoid valve (19) connected to the inflation pipeline. The inflation pipeline is connected to the simulation compensator (3) via a seventh manual ball valve (26). The pressure compensation subsystem also includes an exhaust pipeline installed on the top of the simulation compensator (3), an eighth manual ball valve (25) and a sixth solenoid valve (16) installed on the exhaust pipeline. A water guide pipeline is connected to the bottom of the simulation compensator (3). A ninth manual ball valve (28) is connected to the water guide pipeline. The water guide pipeline is connected to a water receiving tank.

8. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 1, characterized in that, The pressure measurement subsystem includes a first pressure measurement pipeline connected to the analog compensator (3) and a seventh solenoid valve (20) installed on the first pressure measurement pipeline. The output end of the first pressure measurement pipeline is divided into two paths. One path is connected to a first pressure sensor (5), and the other path is connected to a water tank through a tenth manual ball valve (29). The pressure measurement subsystem also includes a second pressure measurement pipeline connected to the air filling container (2), an eighth solenoid valve (21) installed on the second pressure measurement pipeline, and a second pressure sensor (6) installed at the output end of the second pressure measurement pipeline.

9. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 1, characterized in that, The control unit includes an all-in-one computer, a keyboard, and a mouse.

10. The underwater deep-sea pressure equalization test device based on a terrestrial environment according to claim 1, characterized in that, The equalizing monitoring box includes a network switch, a relay control module, an IO acquisition module, an AD conversion module, and a power supply module.

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