Hydraulic cylinder deep sea simulation test device

Abstract

The utility model provides a hydraulic cylinder deep sea simulation test device which comprises a cylinder barrel, cylinder covers are fixedly arranged at 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 on the supporting adjusting platform, and a flat pressing barrel which slides in a sealing 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 utility model relates to the field of simulation tests, in particular to a hydraulic cylinder deep-sea simulation test device. Background Art

[0002] To simulate deep-sea conditions, hydraulic cylinders were tested to ensure stable operation in approximately 800 meters of water. Water leakage into the cylinders was observed after prolonged operation. In deep-sea environments, pressure increases by approximately one atmosphere (approximately 0.1 MPa) for every 10 meters of depth. Therefore, at a depth of 800 meters, the pressure is approximately 8 MPa. Low temperatures: Deep-sea water temperatures are typically low, generally around 4°C. Corrosiveness: Seawater is somewhat corrosive, potentially affecting metal materials and seals.

[0003] Existing test equipment has the following problems when simulating deep-sea high-pressure environments:

[0004] It is difficult to truly recreate the high-pressure environment of the deep sea: 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 may not be sensitive enough to detect subtle leaks in time. Unreasonable structural design: The design of some devices fails to fully consider the flexibility of the connection between the hydraulic cylinder and the pressure cylinder, which can easily lead to jamming or stress concentration, affecting the test results. Utility Model Content

[0005] The main purpose of the utility model is to provide a hydraulic cylinder deep sea simulation test device to solve the problems in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model 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, and 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 piston rod end of the test hydraulic cylinder through a connecting assembly, and the bottom of the connecting assembly slides against the sliding support platform.

[0007] 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;

[0008] The water injection port is used for water injection and pressurization;

[0009] The hydraulic cylinder pressure relief port is connected to the test hydraulic cylinder relief port through a rated pressure-resistant external pressure hose.

[0010] Preferably, a drain port, an overpressure overflow port and a support assembly are provided on both sides of the bottom of the cylinder;

[0011] The drain is used for drainage;

[0012] The overpressure overflow port is used to release pressure when the pressure is too high;

[0013] The support assembly is used to install and fix the cylinder.

[0014] 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;

[0015] A sealing assembly is provided on the cylinder cover at the other end, and the pressure cylinder slides against the sealing assembly.

[0016] 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 screw 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;

[0017] A driving rod is provided between the two transmission rods. The driving rod is connected to the transmission rod through a worm gear and a worm and is driven. Both ends of the driving rod are fixed to the cylinder through bearing seats.

[0018] Preferably, a locking device is provided on the outside 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.

[0019] Preferably, a camera device is fixedly provided at the end of the leveling cylinder, and the camera device faces the connection between the piston rod and the cylinder barrel of the test hydraulic cylinder;

[0020] The cable of the camera device is passed through the interior of the equalizing cylinder and connected with the exterior of the cylinder.

[0021] Preferably, the connecting assembly includes a connecting cylinder and a fixing plate, the piston rod end of the test hydraulic cylinder is fixedly connected to the connecting cylinder, and a rotating roller is provided at the bottom of the connecting cylinder, and the roller slides against the sliding support platform;

[0022] A ball column is provided between the connecting tube and the fixing plate. The 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 to the flattening tube.

[0023] Preferably, the connecting tube is fixedly connected to the fixing plate by bolts, and a groove is provided at the end of the connecting tube, and the ball head of the ball column is located in the groove.

[0024] The utility model provides a hydraulic cylinder deep sea simulation test device, which has the following beneficial effects:

[0025] 1. Through the water injection port and precise pressure control system, it can accurately simulate the pressure conditions at a depth of 800 meters, ensuring that the test environment is highly consistent with the actual deep-sea environment. It can be equipped with a temperature control system to simulate deep-sea water temperature, further improving the authenticity and accuracy of the test.

[0026] 2. The support and adjustment platform utilizes mechanical transmission mechanisms such as screws and drive rods to precisely adjust the position of the test hydraulic cylinder, ensuring its coaxiality with the pressure plate, thereby reducing test errors caused by positional deviations. A displacement monitoring device monitors the test hydraulic cylinder's travel in real time, providing accurate data feedback that facilitates analysis of the cylinder's performance under varying pressures.

[0027] 3. The hydraulic cylinder pressure relief port is connected to the test hydraulic cylinder's bleed port via a rated pressure-resistant external pressure hose, enabling timely detection of water infiltration into the hydraulic cylinder. A camera is mounted at the end of the pressure-scaling cylinder, facing the connection between the piston rod and the cylinder barrel of the test hydraulic cylinder. This monitors and records images or videos of the test process in real time, facilitating detection of subtle leaks.

[0028] 4. The ball column in the connecting assembly provides a universal connection function, allowing a certain angular deviation between the hydraulic cylinder and the pressure cylinder, avoiding stagnation and stress concentration, and improving system reliability. The roller design on the sliding support platform reduces friction, extends service life, and ensures smooth sliding.

[0029] 5. When the internal pressure of the cylinder is too high, it automatically opens to release excess pressure and prevent damage to the equipment. The fixed screw and fixed platform ensure stability after position adjustment and prevent accidental movement. The support assembly ensures that the cylinder remains stable during high-pressure testing, reducing safety risks caused by structural instability.

[0030] 6. Record parameters such as pressure, temperature, and displacement during the test, as well as video footage captured by the camera, to provide detailed information for subsequent analysis. Real-time monitoring and data recording can more easily identify potential problems such as seal failure, leakage, or other mechanical issues, facilitating fault diagnosis and design improvements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Figure 1 This is a front sectional view of the overall structure of the utility model;

[0033] Figure 2 This utility model Figure 1 The left view hides the cylinder head;

[0034] Figure 3 This utility model Figure 2Middle partial enlarged view b;

[0035] Figure 4 This utility model Figure 3 A partial front sectional view of

[0036] Figure 5 This utility model Figure 1 Middle partial enlarged view a;

[0037] In the figure: cylinder 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 outlet 6; overpressure overflow port 7; support assembly 8; sliding support platform 9; equalizing 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 inlet 16; hydraulic cylinder pressure relief port 17. DETAILED DESCRIPTION

[0038] Example 1

[0039] like Figures 1 to 5 As shown, the hydraulic cylinder deep-sea simulation test device includes a cylinder barrel 1, cylinder covers 2 are fixed 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, and a sealed sliding equalizing cylinder 10 is provided on one end of the cylinder barrel 1, the end of the equalizing cylinder 10 is connected to the piston rod end 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.

[0040] A closed cavity is formed at both ends of the cylinder barrel 1 through the cylinder cover 2, and water is pressurized and injected 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, so as not to affect the pressure in the closed cavity and avoid it affecting the test data.

[0041] Cylinder barrel 1 and cylinder head 2 together form a sealed pressure vessel, designed to contain water and exert pressure similar to that of the deep sea. The support and adjustment platform 5 and the sliding support platform 9 secure the test hydraulic cylinder and provide the necessary adjustment capabilities to ensure proper alignment between the hydraulic cylinder and the pressure cylinder; the sliding support platform provides a movable support surface for the connecting components.

[0042] The equalizing cylinder 10 is connected to the test hydraulic cylinder through a connecting assembly. When the hydraulic cylinder is in motion, the equalizing cylinder can be extended and retracted accordingly on the outside of the cylinder without interfering with the internal pressure state. The connecting assembly 13 connects the hydraulic cylinder and the equalizing cylinder, and is also responsible for transmitting force from the hydraulic cylinder to the equalizing 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 of vital importance, especially where the piston rod passes through the cylinder head, special attention must be paid to prevent leakage. The pressurized water injection system is responsible for injecting seawater or fresh water into the cylinder and maintaining the required pressure level to achieve simulation of the deep-sea environment.

[0043] 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 on 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;

[0044] The water injection port 16 is used for water injection and pressurization;

[0045] 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. Whether water enters the test hydraulic cylinder 4 can be detected through the hydraulic cylinder pressure relief port 17.

[0046] 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.

[0047] Oil return port 14 and oil inlet port 15 are connected to the oil return and oil inlet ports of test hydraulic cylinder 4, respectively. They are part of the hydraulic system and are used to control the movement of the hydraulic cylinder. Oil supplied by an external hydraulic pump or other equipment enters the hydraulic cylinder through the oil inlet port, driving the piston. When the piston reverses its movement, the oil is returned to the oil tank or recycled through the oil return port.

[0048] If a fault occurs within the test hydraulic cylinder during a high-pressure test, causing fluid leakage, the internal pressure can be quickly released through the pressure relief port, preventing further damage and allowing the operator to inspect the problem. The rated external pressure hose leads directly to the test hydraulic cylinder's relief port. This design offers the advantage of detecting and addressing even trace amounts of water infiltration into the hydraulic system. This provides an emergency unloading path in abnormal situations, helping to protect the safety of the entire system.

[0049] 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;

[0050] Drain 6 is used for drainage;

[0051] Overpressure relief port 7 is used to release pressure when the pressure is too high;

[0052] The support assembly 8 is used to install and fix the cylinder 1.

[0053] Drain 6 is used to drain the water from the cylinder for maintenance, cleaning or replacement of the test medium. It ensures that the cylinder can be easily emptied before and after testing, and can also quickly reduce the internal pressure when necessary.

[0054] When the pressure inside the cylinder exceeds a preset safety value, the overpressure relief vent automatically opens to release excess pressure, preventing damage to the equipment due to excessive pressure. This provides a safety mechanism that protects the entire test apparatus from overpressure risks. This is crucial for operator safety and the long-term reliability of the equipment.

[0055] Support assembly 8 secures and supports the entire cylinder, ensuring it remains stable under pressure without displacement or tilt. Good support is essential for accurate testing. A robust support system ensures the cylinder remains in the correct position during high-pressure testing, resulting in reliable data.

[0056] 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 operating stroke of the test hydraulic cylinder 4 in real time;

[0057] 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 sealing.

[0058] The displacement monitoring device 3 is mounted on the cylinder head 2 at one end. Connected to the test hydraulic cylinder 4, it monitors and records the distance traveled by the hydraulic cylinder's piston rod in real time. This facilitates precise control and evaluation of the hydraulic cylinder's performance under varying pressures. Accurate stroke measurement provides detailed performance data for the hydraulic cylinder during operation, which is crucial for analyzing its performance in high-pressure environments. If the hydraulic cylinder does not operate as expected, displacement monitoring can help identify the underlying problem, such as leaks or sticking.

[0059] The sealing assembly 11 is located on the cylinder head 2 at the other end. It provides a dynamic sealing interface, allowing the spreader cylinder 10 to slide relative to the cylinder head while maintaining a good seal. This ensures that the high pressure inside the cylinder is not compromised even during the spreader cylinder's movement, thus ensuring the authenticity and consistency of the test environment.

[0060] Preferably, a transmission seat 502 is provided on both sides of the fixed platform 501 in the support and adjustment platform 5, and a vertically rotating screw rod 503 is provided at both ends of the transmission seat 502. The two sides of the fixed platform 501 are threadedly connected to the screw rod 503 through a threaded sleeve, 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 to the screw rod 503 for transmission through bevel gears;

[0061] A driving rod 505 is provided between the two transmission rods 504 . The driving rod 505 is connected to the transmission rod 504 through a worm gear and a worm. Both ends of the driving rod 505 are fixed to the cylinder 1 through bearing seats.

[0062] 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 leveling cylinder 10.

[0063] The fixed platform 501 serves as the base for mounting the test hydraulic cylinder 4. Drive mounts 502 are located on either side of the platform, connecting to and driving a screw rod 503. Each drive mount 502 has a vertically rotating screw rod 503 at each end. The fixed platform 501 is threadedly connected to the screw rod 503 via a threaded sleeve, allowing the fixed platform to move up and down along the screw rod as it rotates.

[0064] Two transmission rods 504 are located between the two transmission seats 502. The ends of the transmission rods 504 are connected to the lead screw 503 via bevel gears. Rotation of the transmission rods drives the lead screw through the bevel gears. A drive rod 505 is located between the two transmission rods 504. It is connected to the transmission rods 504 via a worm gear and worm, enabling power transmission. Both ends of the drive rod 505 are fixed to the cylinder 1 via bearing blocks, ensuring stable rotation.

[0065] 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 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 threaded sleeve, the rotation of the screw rod can cause the fixed platform to move axially along the screw rod. By controlling the steering 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 remain coaxial with the flat pressure cylinder 10.

[0066] Preferably, a locking device 506 is provided on the outside of the screw rod 503, the bottom of the locking device 506 being 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 a bolt 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.

[0067] 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;

[0068] 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 .

[0069] Camera device 12 is positioned directly above the junction of the piston rod and barrel of the test hydraulic cylinder 4, capturing real-time images or video of this area. This video monitoring makes it easier to identify seal failures, leaks, or other mechanical issues between the piston rod and barrel. The recorded video can be used as part of the experimental data for subsequent analysis and report preparation.

[0070] The camera device 12 is fixed to the end of the surge tank 10, ensuring that its lens is facing the key areas to be monitored. The camera cable passes through the interior of the surge tank 10 and then connects to the exterior of the cylinder 1. This wiring arrangement helps protect the cable from external environmental influences while maintaining a neat and tidy system. Because it operates in a high-pressure water environment, the camera device 12 and its cable must be waterproof and pressure-resistant. Specialized underwater cameras and pressure-resistant cables are typically used to meet these requirements.

[0071] Preferably, the connecting assembly 13 includes a connecting cylinder 1301 and a fixing plate 1302. The piston rod end of the test hydraulic cylinder 4 is fixedly connected to the connecting cylinder 1301. A rotating roller 1304 is provided at the bottom of the connecting cylinder 1301. The roller 1304 slides against the sliding support platform 9.

[0072] A ball column 1303 is provided between the connecting cylinder 1301 and the fixing plate 1302 . The 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 .

[0073] 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 avoiding the jamming caused by the coaxial operation of the test hydraulic cylinder 4 and the flattening cylinder 10.

[0074] The end of the piston rod 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 as the connecting cylinder moves, reducing friction. The ball head design of the ball column 1303 allows it to rotate and tilt freely between the connecting cylinder 1301 at one end and the fixed plate 1302. In this way, even if there is a certain angular deviation between the test hydraulic cylinder 4 and the leveling cylinder 10, the ball column can adapt to this change and 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, allowing it to extend and retract outside the closed cavity.

[0075] 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, thereby realizing a universal connection.

[0076] Example 2

[0077] 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:

[0078] 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 horizontal pressure cylinder 10;

[0079] S2. Perform a waterless commissioning test: Without filling the cylinder 1 with water and without installing the pressure plate 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 smoothly and reliably on the sliding support platform 9;

[0080] After confirming that the test hydraulic cylinder 4 operates smoothly and reliably, install the pressure 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. After the test hydraulic cylinder 4 operates smoothly and reliably, proceed to the next test;

[0081] S3. Static water pressure test: The hydraulic cylinder 4 is tested without oil pressure, and the pressure bearing capacity of the cylinder 1 is tested. A hydraulic press is used to slowly apply pressure through the water inlet 16 to observe whether the overpressure relief port 7 can open normally. The final opening pressure of the overpressure relief port 7 is set to the rated pressure + 0.5 MPa;

[0082] S4. Dynamic hydraulic test: After using a hydraulic press to increase the water pressure in cylinder barrel 1 to the set pressure, supply oil pressure to the oil return port 14 and the oil inlet port 15 through the hydraulic pump station. Extend the piston rod of the test hydraulic cylinder 4, driving the equalizing cylinder 10. Observe the displacement value change of the displacement monitoring device 3 and the extension of the equalizing cylinder 10 to ensure continuous movement without any lag. Use the camera device 12 to collect operating data of the test hydraulic cylinder 4.

[0083] After the test hydraulic cylinder 4 has run for a rated time, the hydraulic cylinder pressure relief port 17 is used to detect whether water has entered the test hydraulic cylinder 4 during the operation under external pressure, thereby completing the simulation test.

[0084] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection 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 flat pressure cylinder (10) is provided on one end of the cylinder barrel (1), an end of the flat pressure 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).

2. The hydraulic cylinder deep sea simulation test device according to claim 1, 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 on 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 injecting water and increasing pressure; 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.

3. The hydraulic cylinder deep sea simulation test device according to claim 1, 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 (1).

4. The hydraulic cylinder deep sea simulation test device according to claim 1, 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, characterized in that: 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). Both sides of the fixed platform (501) are threadedly connected to the screw rod (503) through a threaded sleeve, 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) through a bevel gear for transmission; A driving rod (505) is provided between the two transmission rods (504). The driving rod (505) is connected to the transmission rod (504) through a worm gear and a worm for driving. Both ends of the driving rod (505) are fixed to the cylinder (1) through bearing seats.

6. The hydraulic cylinder deep sea simulation test device according to claim 5, characterized in that: A locking device (506) is provided on the outside of the screw rod (503), and the bottom of the locking device (506) is fixed to the fixed platform (501). 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, 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 leveling cylinder (10) and connected to the exterior of the cylinder (1).

8. The hydraulic cylinder deep sea simulation test device according to claim 1, characterized in that: The connecting assembly (13) includes a connecting cylinder (1301) and a fixed plate (1302). The end of the piston rod of the test hydraulic cylinder (4) is fixedly connected to the connecting cylinder (1301). A rotating roller (1304) is provided at the bottom of the connecting 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, 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).

Images