Hydraulic cylinder deep sea simulation test device and method

Abstract

The invention provides a hydraulic cylinder deep sea simulation test device and method.The hydraulic cylinder deep sea simulation test device comprises a cylinder barrel, cylinder covers are fixedly arranged at the two ends of the cylinder barrel, a supporting adjusting platform and a sliding supporting platform which are horizontally arranged are arranged in the cylinder barrel, a test hydraulic cylinder is fixed to the supporting adjusting platform, and a flat pressing barrel sliding in a sealed mode is arranged on the cylinder barrel at one end; the end of the flat pressing cylinder is connected with the end of a piston rod of the test hydraulic cylinder through a connecting assembly, and the bottom of the connecting assembly abuts against the sliding supporting platform to slide. The deep sea simulation test device not only can simulate a deep sea high-pressure environment more truly, but also can significantly reduce test errors, improve leakage detection capability, enhance reliability and durability of a system, improve safety, and provide comprehensive data recording and analysis support. Therefore, the test quality of the hydraulic cylinder product is greatly improved, and the performance and reliability of the hydraulic cylinder product in practical application are ensured.

Description

Technical Field

[0001] The invention relates to the field of simulation tests, and in particular to a hydraulic cylinder deep-sea simulation test device and method. Background Art

[0002] In order to simulate the deep sea conditions, the hydraulic cylinder products can run smoothly in the water conditions of about 800 meters. After a long time of working, water is leaked into the hydraulic cylinder. In the deep sea environment, the pressure increases by about one atmosphere (about 0.1MPa) for every 10 meters of depth. Therefore, at a depth of 800 meters, the pressure is about 8MPa. Low temperature: The sea water temperature in the deep sea is usually low, generally around 4°C. Corrosiveness: Seawater has a certain degree of corrosiveness and has a potential impact on metal materials and seals.

[0003] The existing test equipment has the following problems when simulating deep-sea high-pressure environment: It is difficult to truly restore the deep-sea high-pressure environment: Many existing devices are unable to accurately control and maintain high-pressure conditions, resulting in large differences between the test results and the performance in the actual deep-sea environment. There are large errors in the test process: The accuracy of the test data is limited due to the lack of high-precision displacement monitoring and pressure control. Insufficient leak detection: Existing devices may not have an effective leak detection mechanism, or the detection method is not sensitive enough to detect subtle leaks in time. Unreasonable structural design: Some devices fail to fully consider the connection flexibility between the hydraulic cylinder and the flat cylinder in design, which can easily lead to sticking or stress concentration, affecting the test results. Summary of the invention

[0004] The main purpose of the present invention is to provide a hydraulic cylinder deep sea simulation test device and method to solve the problems in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: it includes a cylinder barrel, cylinder covers are fixedly provided at both ends of the cylinder barrel, a horizontally arranged support adjustment platform and a sliding support platform are provided in the cylinder barrel, the test hydraulic cylinder is fixed on the support adjustment platform, a sealed sliding flat pressure cylinder is provided on one end of the cylinder barrel, the end of the flat pressure cylinder is connected to the end of the piston rod of the test hydraulic cylinder through a connecting assembly, and the bottom of the connecting assembly slides against the sliding support platform.

[0006] Preferably, a water injection port, an oil return port, an oil inlet port and a hydraulic cylinder pressure relief port are provided on the top of the cylinder barrel, and the oil return port and the oil inlet port are respectively connected to the oil return port and the oil inlet port of the test hydraulic cylinder through oil pipes; The water injection port is used for water injection and pressurization; The hydraulic cylinder pressure relief port is connected to the test hydraulic cylinder discharge port through a rated pressure resistant external pressure hose.

[0007] Preferably, a drain port, an overpressure overflow port and a support assembly are provided on both sides of the bottom of the cylinder; The drain is used for drainage; The overpressure relief port is used to release pressure when the pressure is too high; The support assembly is used to install and fix the cylinder.

[0008] Preferably, a displacement monitoring device is provided on the cylinder cover at one end, and the displacement monitoring device is connected to the test hydraulic cylinder; A sealing assembly is arranged on the cylinder cover at the other end, and the flat-pressure cylinder slides against the sealing assembly.

[0009] Preferably, transmission seats are provided on both sides of the fixed platform in the support and adjustment platform, and vertically rotating screw rods are provided at both ends of the transmission seat. The two sides of the fixed platform are threadedly connected to the screw rods through thread sleeves, and two transmission rods are provided between the transmission seats on both sides. The two ends of the transmission rods are connected to the screw rods for transmission through bevel gears; A driving rod is arranged between the two transmission rods. The driving rod is connected and driven with the transmission rod through a worm gear and a worm. Both ends of the driving rod are fixed on the cylinder barrel through bearing seats.

[0010] Preferably, a locking device is provided on the outer side of the screw rod, the bottom of the locking device is fixed to the fixed platform, and the locking device is used to connect the fixed screw rod and the fixed platform.

[0011] Preferably, a camera device is fixedly provided at the end of the flat-pressing cylinder, and the camera device faces the connection between the piston rod and the cylinder barrel of the test hydraulic cylinder; The cable of the camera device is passed through the inside of the flat-pressure cylinder and connected with the outside of the cylinder.

[0012] Preferably, the connection assembly includes a connection cylinder and a fixed plate, the piston rod end of the test hydraulic cylinder is fixedly connected to the connection cylinder, and a rotating roller is provided at the bottom of the connection cylinder, and the roller slides against the sliding support platform; A ball column is arranged between the connecting tube and the fixing plate, a ball head at one end of the ball column is fixed between the connecting tube and the fixing plate, and the other end of the ball column is fixedly connected with the flat pressure tube.

[0013] Preferably, the connecting tube is fixedly connected to the fixing plate by bolts, a groove is provided at the end of the connecting tube, and the ball head of the ball column is located in the groove.

[0014] The method for deep sea simulation test of hydraulic cylinders includes the following steps: S1. Install and fix the test hydraulic cylinder on the support and adjustment platform, and adjust the height of the test hydraulic cylinder through the support and adjustment platform so that it is coaxial with the flat pressure cylinder; S2. Carry out waterless commissioning test: without water filling the cylinder and without installing the pressure plate, let the test hydraulic cylinder reciprocate without load, and observe whether the test hydraulic cylinder and the connecting components run smoothly and reliably on the sliding support platform; After confirming that the test hydraulic cylinder runs smoothly and reliably, install the leveling cylinder and camera device, and install the cylinder cover to seal the cylinder. After installation and leveling, let the test hydraulic cylinder run back and forth without load to observe whether the operation is smooth and reliable. If the operation is stuck, stop the operation and disassemble and inspect it. After the test hydraulic cylinder runs smoothly and reliably, carry out the next test; S3. Static water pressure test: Test the hydraulic cylinder without oil pressure, test the pressure bearing capacity of the cylinder, use a hydraulic press to slowly pressurize through the water injection port, observe whether the overpressure overflow port can be opened normally, and set the final opening pressure of the overpressure overflow port to the rated pressure + 0.5Mpa; S4. Dynamic water pressure test: After using a hydraulic press to increase the water pressure in the cylinder to the set pressure, supply oil pressure to the return oil interface and the oil inlet interface through the hydraulic pump station, so that the piston rod of the test hydraulic cylinder extends to drive the leveling cylinder to move, observe the displacement value change of the displacement monitoring device and the extension of the leveling cylinder to ensure that the action is continuous and without stagnation, and collect the operating data of the test hydraulic cylinder through the camera device; After the test hydraulic cylinder has run for a rated time, the hydraulic cylinder pressure relief port is used to detect whether water has entered the test hydraulic cylinder while the hydraulic cylinder is operating under external pressure, thereby completing the simulation test.

[0015] The present invention provides a hydraulic cylinder deep sea simulation test device and method, with the following beneficial effects: 1. Through the water injection port and precise pressure control system, the pressure conditions at a depth of 800 meters can be accurately simulated to ensure that the test environment is highly consistent with the actual deep-sea environment. A temperature control system can be equipped to simulate the deep-sea water temperature to further improve the authenticity and accuracy of the test.

[0016] 2. The support and adjustment platform uses mechanical transmission mechanisms such as screw rods and transmission rods to accurately adjust the position of the test hydraulic cylinder to ensure that it is coaxial with the flat cylinder, reducing the test error caused by position deviation. The displacement monitoring device monitors the running stroke of the test hydraulic cylinder in real time, provides accurate data feedback, and helps analyze the performance of the hydraulic cylinder under different pressure conditions.

[0017] 3. The hydraulic cylinder pressure relief port is connected to the test hydraulic cylinder relief port through a rated pressure-resistant external pressure hose, which can detect whether water has penetrated into the hydraulic cylinder in time. The camera device is installed at the end of the flat cylinder, facing the connection between the piston rod and the cylinder barrel of the test hydraulic cylinder, and monitors and records images or videos during the test in real time, which is convenient for detecting subtle leakage.

[0018] 4. The ball column in the connection assembly provides a universal connection function, allowing a certain angle deviation between the hydraulic cylinder and the flat cylinder, avoiding stagnation and stress concentration, and improving the reliability of the system. The roller design on the sliding support platform reduces friction, extends service life, and ensures smooth sliding.

[0019] 5. When the pressure inside the cylinder is too high, it will automatically open to release excess pressure and prevent overpressure from damaging the equipment. The screw rod and the fixed platform ensure stability after position adjustment and prevent accidental movement. The support assembly ensures that the cylinder remains stable during the high-pressure test, reducing safety risks caused by unstable structure.

[0020] 6. Record the pressure, temperature, displacement and other parameters during the test, as well as the video data taken by the camera, to provide detailed basis for subsequent analysis. Through real-time monitoring and data recording, it is easier to identify potential problems such as seal failure, leakage or other mechanical problems, which is convenient for fault diagnosis and design improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a front cross-sectional view of the overall structure of the present invention; Figure 2 The present invention Figure 1 The left view hides the cylinder head; Figure 3 The present invention Figure 2 Partial enlarged view b; Figure 4 The present invention Figure 3 A partial front cross-sectional view of Figure 5 The present invention Figure 1 A partial enlarged view in the middle; In the figure: cylinder barrel 1; cylinder head 2; displacement monitoring device 3; test hydraulic cylinder 4; support and adjustment platform 5; fixed platform 501; transmission seat 502; screw 503; transmission rod 504; drive rod 505; locking device 506; drain port 6; overpressure overflow port 7; support assembly 8; sliding support platform 9; leveling cylinder 10; sealing assembly 11; camera device 12; connecting assembly 13; connecting cylinder 1301; fixing plate 1302; ball column 1303; roller 1304; groove 1305; oil return interface 14; oil inlet interface 15; water injection port 16; hydraulic cylinder pressure relief port 17. DETAILED DESCRIPTION

[0022] Example 1 like Figures 1 to 5 As shown, the hydraulic cylinder deep-sea simulation test device comprises a cylinder barrel 1, cylinder covers 2 are fixedly provided at both ends of the cylinder barrel 1, a horizontally arranged support adjustment platform 5 and a sliding support platform 9 are provided in the cylinder barrel 1, a test hydraulic cylinder 4 is fixed on the support adjustment platform 5, a sealed sliding leveling cylinder 10 is provided on one end of the cylinder barrel 1, an end of the leveling cylinder 10 is connected to the end of the piston rod of the test hydraulic cylinder 4 through a connecting assembly 13, and the bottom of the connecting assembly 13 slides against the sliding support platform 9.

[0023] A closed cavity is formed at both ends of the cylinder barrel 1 through the cylinder cover 2, and water is pressurized into the cavity to simulate the deep-sea environment. The test hydraulic cylinder 4 is installed in the cylinder barrel 1 through the support and adjustment platform 5, and the position of the test hydraulic cylinder 4 can be adjusted through the support and adjustment platform 5 to align it with the equalizing cylinder 10. The piston rod end of the test hydraulic cylinder 4 is connected to the equalizing cylinder 10 through the connecting assembly 13. When the test hydraulic cylinder 4 is in operation, it can drive the equalizing cylinder 10 to move and extend outside the closed cavity, thereby not affecting the pressure in the closed cavity and avoiding it affecting the test data.

[0024] The cylinder barrel 1 and the cylinder head 2 together form a closed pressure vessel for containing water and applying a pressure similar to that of the deep sea. The support adjustment platform 5 and the sliding support platform 9 are responsible for fixing the hydraulic cylinder for testing and providing the necessary adjustment capabilities to ensure that the hydraulic cylinder is properly aligned with the pressure cylinder; the sliding support platform provides a movable support surface for the connecting components.

[0025] The leveling cylinder 10 is connected to the test hydraulic cylinder through a connecting assembly. When the hydraulic cylinder is actuated, the leveling cylinder can be extended and retracted on the outside of the cylinder barrel accordingly without interfering with the internal pressure state. The connecting assembly 13 connects the hydraulic cylinder and the leveling cylinder, and is also responsible for transmitting force from the hydraulic cylinder to the leveling cylinder, and can move smoothly on the sliding support platform. In order to accurately simulate the pressure conditions in the deep sea environment, the sealing of the entire system is crucial, especially where the piston rod passes through the cylinder cover, special attention should be paid to prevent leakage. The pressurized water injection system is responsible for injecting seawater or fresh water into the cylinder barrel and maintaining the required pressure level, thereby simulating the deep sea environment.

[0026] Preferably, a water injection port 16, an oil return port 14, an oil inlet port 15 and a hydraulic cylinder pressure relief port 17 are provided at the top of the cylinder barrel 1, and the oil return port 14 and the oil inlet port 15 are respectively connected to the oil return port and the oil inlet port of the test hydraulic cylinder 4 through oil pipes; The water injection port 16 is used for water injection and pressurization; The hydraulic cylinder pressure relief port 17 is communicated with the discharge port of the test hydraulic cylinder 4 through a rated pressure resistant external pressure hose. Through the hydraulic cylinder pressure relief port 17, it is possible to detect whether water has entered the test hydraulic cylinder 4.

[0027] The water injection port 16 is used to inject pressurized water into the cylinder to simulate the high pressure conditions of the deep sea. By adjusting the amount of injected water and the pressure, different simulation depths can be achieved.

[0028] The oil return interface 14 and the oil inlet interface 15 are connected to the oil return port and the oil inlet port of the test hydraulic cylinder 4 respectively. They are part of the hydraulic system and are used to control the action of the hydraulic cylinder. The oil provided by an external hydraulic pump or other equipment enters the hydraulic cylinder through the oil inlet interface to drive the piston to move; when the piston moves in the opposite direction, the oil is sent back to the oil storage tank or recycled through the oil return interface.

[0029] If a fault occurs inside the test hydraulic cylinder during the high-pressure test, causing liquid leakage, the internal pressure can be quickly released through the pressure relief port to prevent further damage and allow the operator to check the problem. The rated pressure hose directly leads to the relief port of the test hydraulic cylinder. The advantage of this design is that even if a trace of water penetrates into the hydraulic system, it can be discovered and handled in time. It provides an emergency unloading path in abnormal situations, which helps to protect the safety of the entire system.

[0030] Preferably, a drain port 6, an overpressure overflow port 7 and a support assembly 8 are provided on both sides of the bottom of the cylinder 1; Drain 6 is used for drainage; The overpressure relief port 7 is used to release pressure when the pressure is too high; The supporting assembly 8 is used to install and fix the cylinder barrel 1 .

[0031] Drain port 6 is used to drain the water in the cylinder for maintenance, cleaning or replacement of the test medium. It ensures that the cylinder can be easily emptied before and after the test, and the internal pressure can be quickly reduced when necessary.

[0032] Overpressure relief port 7 When the pressure inside the cylinder exceeds the preset safety value, the overpressure relief port will automatically open to release the excess pressure to prevent equipment damage due to excessive pressure. It provides a safety mechanism to protect the entire test device from the risk of overpressure. This is essential to ensure the safety of operators and the long-term reliability of the equipment.

[0033] The support assembly 8 is used to fix and support the entire cylinder, ensuring that it remains stable under pressure without displacement or tilt. Good support is the basis for accurate testing. A stable support system can ensure that the cylinder remains in the correct position during the high-pressure test, thereby obtaining reliable data results.

[0034] Preferably, a displacement monitoring device 3 is provided on the cylinder cover 2 at one end, and the displacement monitoring device 3 is connected to the test hydraulic cylinder 4; the displacement monitoring device 3 can monitor the running stroke of the test hydraulic cylinder 4 in real time; A sealing assembly 11 is provided on the cylinder head 2 at the other end, and the pressure cylinder 10 slides against the sealing assembly 11. The pressure cylinder 10 slides against the cylinder head 2 through the sealing assembly 11, and the sealing assembly 11 ensures the sealing performance.

[0035] The displacement monitoring device 3 is installed on the cylinder head 2 at one end. It is connected to the test hydraulic cylinder 4 to monitor and record the movement distance of the hydraulic cylinder piston rod in real time. This helps to accurately control and evaluate the performance of the hydraulic cylinder under different pressure conditions. By accurately measuring the stroke, specific performance data of the hydraulic cylinder during operation can be obtained, which is crucial for analyzing its performance in a high-pressure environment. If the hydraulic cylinder does not work as expected, displacement monitoring can help identify the problem, such as whether there is a leak, sticking, etc.

[0036] The sealing assembly 11 is located on the cylinder head 2 at the other end. It provides a dynamic sealing interface, allowing the pressure cylinder 10 to slide relative to the cylinder head while maintaining a good sealing effect. It ensures that the high pressure state in the cylinder will not be destroyed even when the pressure cylinder moves, thereby ensuring the authenticity and consistency of the test environment.

[0037] Preferably, transmission seats 502 are provided on both sides of the fixed platform 501 in the support and adjustment platform 5, and vertically rotating screw rods 503 are provided at both ends of the transmission seat 502. The two sides of the fixed platform 501 are threadedly connected with the screw rod 503 through thread sleeves, and two transmission rods 504 are provided between the transmission seats 502 on both sides. The two ends of the transmission rod 504 are connected with the screw rod 503 for transmission through bevel gears; A driving rod 505 is provided between the two transmission rods 504 . The driving rod 505 is connected and driven to the transmission rod 504 through a worm gear and a worm. Both ends of the driving rod 505 are fixed to the cylinder barrel 1 through bearing seats.

[0038] The driving rod 505 rotates through the worm gear and the worm to drive the transmission rod 504 to rotate, and the transmission rod 504 drives the screw rod 503 to rotate through the bevel gear, thereby driving the fixed platform 501 to move up and down, thereby adjusting the position of the test hydraulic cylinder 4 on the fixed platform 501 to make it coaxial with the flat cylinder 10.

[0039] The fixed platform 501 is a basic platform for installing the test hydraulic cylinder 4. Transmission seats 502 are provided on both sides for connecting and driving the screw rod 503. There is a vertically rotating screw rod 503 at each end of the transmission seat 502 on each side. The fixed platform 501 is threadedly connected to the screw rod 503 through a thread sleeve, which means that when the screw rod rotates, the fixed platform can move up and down along the screw rod.

[0040] The two transmission rods 504 are located between the transmission seats 502 on both sides. The two ends of the transmission rod 504 are connected to the screw rod 503 through bevel gears, so that when the transmission rod rotates, the screw rod can be driven to rotate through the bevel gears. The driving rod 505 is set between the two transmission rods 504. It is connected to the transmission rod 504 through a worm gear and a worm to achieve power transmission. The two ends of the driving rod 505 are fixed to the cylinder 1 through bearing seats to ensure its stable rotation.

[0041] When the position of the test hydraulic cylinder 4 needs to be adjusted, the driving rod 505 is first manually operated to rotate. The driving rod 505 transmits the rotational motion to the transmission rod 504 through the worm gear and the worm. The transmission rod 504 then transmits the rotational motion to the screw rod 503 through the bevel gears at both ends. Since the fixed platform 501 is threadedly connected to the screw rod 503 through the thread sleeve, the rotation of the screw rod will cause the fixed platform to move along the axial direction of the screw rod. By controlling the direction and speed of the driving rod 505, the height of the fixed platform 501 can be accurately adjusted, thereby ensuring that the test hydraulic cylinder 4 can maintain the coaxial line with the flat pressure cylinder 10.

[0042] Preferably, a locking device 506 is provided on the outside of the screw rod 503, the bottom of the locking device 506 is fixed to the fixed platform 501, and the locking device 506 is used to connect the fixed screw rod 503 and the fixed platform 501. The locking device 506 is a clamp, which is tightened by bolts to lock the clamp on the screw rod 503, thereby achieving the connection and fixation of the screw rod 503 and the fixed platform 501.

[0043] Preferably, a camera device 12 is fixedly provided at the end of the leveling cylinder 10, and the camera device 12 faces the connection between the piston rod and the cylinder barrel of the test hydraulic cylinder 4; The cable of the camera device 12 is passed through the interior of the pressure cylinder 10 and connected to the exterior of the cylinder 1 .

[0044] The camera device 12 is facing the connection between the piston rod and the cylinder barrel of the test hydraulic cylinder 4, and can capture images or videos of the area in real time. Through video monitoring, it is easier to identify whether the seal between the piston rod and the cylinder barrel fails, whether there is leakage or other mechanical problems. The recorded video can be used as part of the experimental data for subsequent analysis and report writing.

[0045] The camera device 12 is fixed to the end of the pressure-equalizing cylinder 10, ensuring that its lens is facing the key area that needs to be monitored. The cable of the camera device passes through the interior of the pressure-equalizing cylinder 10 and is then connected to the outside of the cylinder 1. This wiring method helps to protect the cable from the influence of the external environment while keeping the system tidy. Since it works in a high-pressure water environment, the camera device 12 and its cable must have good waterproof and pressure-resistant performance. Special underwater cameras and pressure-resistant cables are usually used to meet these requirements.

[0046] Preferably, the connection assembly 13 includes a connection cylinder 1301 and a fixed plate 1302, the piston rod end of the test hydraulic cylinder 4 is fixedly connected to the connection cylinder 1301, and a rotating roller 1304 is provided at the bottom of the connection cylinder 1301, and the roller 1304 slides against the sliding support platform 9; A ball column 1303 is provided between the connecting tube 1301 and the fixing plate 1302 , a ball head at one end of the ball column 1303 is fixed between the connecting tube 1301 and the fixing plate 1302 , and the other end of the ball column 1303 is fixedly connected to the leveling tube 10 .

[0047] The ball head at the end of the ball column 1303 is clamped between the connecting tube 1301 and the fixing plate 1302 to play a universal connection role, thereby preventing the test hydraulic cylinder 4 and the flattening cylinder 10 from running in different axes and causing jamming.

[0048] The piston rod end of the test hydraulic cylinder 4 is fixedly connected to the connecting cylinder 1301. When the hydraulic cylinder is actuated, the piston rod drives the connecting cylinder to move. The roller 1304 at the bottom of the connecting cylinder 1301 rests on the sliding support platform 9 and rolls with the movement of the connecting cylinder, reducing friction. The ball head design of the ball column 1303 allows it to rotate and tilt freely between the connecting cylinder 1301 and the fixed plate 1302 at one end. In this way, even if there is a certain angle deviation between the test hydraulic cylinder 4 and the leveling cylinder 10, the ball column can adapt to this change to prevent jamming or excessive stress. The other end of the ball column 1303 is fixedly connected to the leveling cylinder 10, transmitting the movement of the piston rod to the leveling cylinder, so that it can be extended and retracted outside the closed cavity.

[0049] Preferably, the connecting tube 1301 is fixedly connected to the fixing plate 1302 by bolts, and a groove 1305 is provided at the end of the connecting tube 1301, and the ball head of the ball column 1303 is located in the groove 1305. The connecting tube 1301 is fixedly connected to the fixing plate 1302, and the ball head of the ball column 1303 can be restricted to move in the groove 1305 to achieve a universal connection.

[0050] Example 2 like Figures 1 to 5 As shown, in combination with Example 1, the method for deep sea simulation test of hydraulic cylinder is further described, and the method steps are as follows: S1. Install and fix the test hydraulic cylinder 4 on the support and adjustment platform 5, and adjust the height of the test hydraulic cylinder 4 through the support and adjustment platform 5 so that it is coaxial with the flat pressure cylinder 10; S2. Perform a waterless commissioning test: When the cylinder barrel 1 is not filled with water and the pressure cylinder 10 is not installed, let the test hydraulic cylinder 4 reciprocate without load, and observe whether the test hydraulic cylinder 4 and the connecting assembly 13 run smoothly and reliably on the sliding support platform 9; After confirming that the test hydraulic cylinder 4 runs smoothly and reliably, install the leveling cylinder 10 and the camera device 12, and install the cylinder cover 2 to seal the cylinder 1. After installation and leveling, let the test hydraulic cylinder 4 reciprocate without load to observe whether the operation is smooth and reliable. If the operation is stuck, stop the operation and disassemble and inspect it until the test hydraulic cylinder 4 runs smoothly and reliably, and then carry out the next test; S3, static water pressure test: test the hydraulic cylinder 4 without oil pressure, test the pressure bearing capacity of the cylinder 1, use a hydraulic press to slowly pressurize through the water injection port 16, observe whether the overpressure overflow port 7 can be opened normally, and set the final opening pressure of the overpressure overflow port 7 to the rated pressure + 0.5Mpa; S4, dynamic water pressure test: after using a hydraulic press to increase the water pressure in the cylinder 1 to the set pressure, supply oil pressure to the oil return interface 14 and the oil inlet interface 15 through the hydraulic pump station, so that the piston rod of the test hydraulic cylinder 4 extends to drive the leveling cylinder 10 to move, observe the displacement value change of the displacement monitoring device 3 and the extension of the leveling cylinder 10, ensure that the action is continuous and without stagnation, and collect the operating data of the test hydraulic cylinder 4 through the camera device 12; After the test hydraulic cylinder 4 runs for a rated time, it is detected through the hydraulic cylinder pressure relief port 17 whether water enters the test hydraulic cylinder 4 during the operation under external pressure, thereby completing the simulation test.

[0051] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. Hydraulic cylinder deep sea simulation test device, characterized by: The invention comprises a cylinder barrel (1), cylinder covers (2) are fixedly provided at both ends of the cylinder barrel (1), a horizontally arranged support adjustment platform (5) and a sliding support platform (9) are provided in the cylinder barrel (1), a test hydraulic cylinder (4) is fixed on the support adjustment platform (5), a sealed sliding leveling cylinder (10) is provided on one end of the cylinder barrel (1), an end of the leveling cylinder (10) is connected to the end of the piston rod of the test hydraulic cylinder (4) via a connecting assembly (13), and the bottom of the connecting assembly (13) slides against the sliding support platform (9).

2. The hydraulic cylinder deep sea simulation test device according to claim 1 is characterized in that: A water injection port (16), an oil return port (14), an oil inlet port (15) and a hydraulic cylinder pressure relief port (17) are provided at the top of the cylinder barrel (1); the oil return port (14) and the oil inlet port (15) are respectively connected to the oil return port and the oil inlet port of the test hydraulic cylinder (4) through oil pipes; The water injection port (16) is used for injecting water and increasing pressure; The hydraulic cylinder pressure relief port (17) is connected to the discharge port of the test hydraulic cylinder (4) through a rated pressure resistant external pressure hose.

3. The hydraulic cylinder deep sea simulation test device according to claim 1 is characterized in that: A drain port (6), an overpressure overflow port (7) and a support assembly (8) are provided on both sides of the bottom of the cylinder (1); The drain port (6) is used for draining water; The overpressure relief port (7) is used to release pressure when the pressure is too high; The support assembly (8) is used to install and fix the cylinder barrel (1).

4. The hydraulic cylinder deep sea simulation test device according to claim 1 is characterized in that: A displacement monitoring device (3) is provided on the cylinder cover (2) at one end, and the displacement monitoring device (3) is connected to the test hydraulic cylinder (4); A sealing assembly (11) is provided on the cylinder cover (2) at the other end, and the pressure cylinder (10) slides against the sealing assembly (11).

5. The hydraulic cylinder deep sea simulation test device according to claim 1 is characterized in that: Transmission seats (502) are provided on both sides of the fixed platform (501) in the support adjustment platform (5), and vertically rotating screw rods (503) are provided at both ends of the transmission seat (502). Both sides of the fixed platform (501) are threadedly connected to the screw rod (503) through thread sleeves, and two transmission rods (504) are provided between the transmission seats (502) on both sides. Both ends of the transmission rod (504) are connected to the screw rod (503) for transmission through bevel gears. A driving rod (505) is provided between the two transmission rods (504). The driving rod (505) is connected and driven to the transmission rod (504) via a worm gear and a worm. Both ends of the driving rod (505) are fixed to the cylinder barrel (1) via bearing seats.

6. The hydraulic cylinder deep sea simulation test device according to claim 5 is characterized in that: A locking device (506) is provided on the outside of the screw rod (503), the bottom of the locking device (506) is fixed to the fixed platform (501), and the locking device (506) is used to connect the fixed screw rod (503) and the fixed platform (501).

7. The hydraulic cylinder deep sea simulation test device according to claim 1 is characterized in that: A camera device (12) is fixedly provided at the end of the leveling cylinder (10), and the camera device (12) faces the connection between the piston rod and the cylinder barrel of the test hydraulic cylinder (4); The piston rod diameters of the pressure cylinder (10) and the test hydraulic cylinder (4) are the same; The cable of the camera device (12) is passed through the interior of the pressure-equalizing cylinder (10) and connected to the exterior of the cylinder (1).

8. The hydraulic cylinder deep sea simulation test device according to claim 1 is characterized in that: The connection assembly (13) comprises a connection cylinder (1301) and a fixed plate (1302); the piston rod end of the test hydraulic cylinder (4) is fixedly connected to the connection cylinder (1301); a rotating roller (1304) is provided at the bottom of the connection cylinder (1301); the roller (1304) slides against the sliding support platform (9); A ball column (1303) is provided between the connecting cylinder (1301) and the fixing plate (1302); a ball head at one end of the ball column (1303) is fixed between the connecting cylinder (1301) and the fixing plate (1302); and the other end of the ball column (1303) is fixedly connected to the leveling cylinder (10).

9. The hydraulic cylinder deep sea simulation test device according to claim 8 is characterized in that: The connecting tube (1301) is fixedly connected to the fixing plate (1302) by means of bolts; a groove (1305) is provided at the end of the connecting tube (1301); and the ball head of the ball column (1303) is located in the groove (1305).

10. The method for deep sea simulation test of hydraulic cylinder according to any one of claims 1 to 9, wherein the method steps are as follows: S1, installing and fixing the test hydraulic cylinder (4) on the support and adjustment platform (5), and adjusting the height of the test hydraulic cylinder (4) through the support and adjustment platform (5) so that it is coaxial with the leveling cylinder (10); S2. Perform a waterless commissioning test: without water being injected into the cylinder barrel (1) and without installing the leveling cylinder (10), allow the test hydraulic cylinder (4) to reciprocate without load, and observe whether the test hydraulic cylinder (4) and the connecting assembly (13) operate stably and reliably on the sliding support platform (9); After confirming that the test hydraulic cylinder (4) operates smoothly and reliably, install the leveling cylinder (10) and the camera device (12), and install the cylinder head (2) to seal the cylinder barrel (1). After installation and leveling, let the test hydraulic cylinder (4) reciprocate without load to observe whether the operation is smooth and reliable. If the operation is stuck, stop the operation and disassemble and inspect it. After the test hydraulic cylinder (4) operates smoothly and reliably, carry out the next test; S3, static water pressure test: the hydraulic cylinder (4) is tested without oil pressure, the pressure bearing capacity of the cylinder (1) is tested, and a hydraulic press is used to slowly pressurize the water injection port (16) to observe whether the overpressure relief port (7) can be opened normally. The final opening pressure of the overpressure relief port (7) is set to the rated pressure + 0.5 MPa; S4, dynamic water pressure test: after using a hydraulic press to increase the water pressure in the cylinder (1) to the set pressure, supply oil pressure to the oil return interface (14) and the oil inlet interface (15) through the hydraulic pump station, so that the piston rod of the test hydraulic cylinder (4) extends to drive the leveling cylinder (10) to move, observe the displacement value change of the displacement monitoring device (3) and the extension of the leveling cylinder (10), ensure that the action is continuous and without stagnation, and collect the operating data of the test hydraulic cylinder (4) through the camera device (12); After the test hydraulic cylinder (4) has run for a rated time, it is detected through the hydraulic cylinder pressure relief port (17) whether water has entered the test hydraulic cylinder (4) during the operation under external pressure, thereby completing the simulation test.

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