An accumulator pressure test bench and its testing method

Abstract

The present invention relates to the technical field of accumulator pressure detection, and particularly to an accumulator pressure test bench and a test method thereof, including a computer controller, an accumulator rack and a medium tank. The computer controller, the accumulator rack and the medium tank are fixedly connected through a threaded cap and a threaded rod. A servo motor is fixedly connected to the top end of the accumulator rack. The servo motor is fixedly connected to the accumulator through a servo oil cylinder valve group. A servo two-way oil pump is fixedly connected to the inner side of the top end of the accumulator rack. The bottom end of the servo two-way oil pump is fixedly connected to an upper quick sealing connector through a fixed cross plate. A guide post is fixedly connected to the upper end of the fixed cross plate. In the present invention, the upper and lower ends of the accumulator housing can be quickly sealed during the test, effectively improving the test efficiency. At the same time, the placement condition of the accumulator housing can be monitored through an automatic locking system and a monitoring system, making it more intelligent.

Description

Technical Field

[0001] The present invention relates to the technical field of accumulator pressure detection, and particularly to an accumulator pressure test bench and a test method thereof. Background Art

[0002] An accumulator is an energy storage device in a hydraulic and pneumatic system. It converts the energy in the system into compressed energy or potential energy and stores it at an appropriate time. When the system needs it, it converts the compressed energy or potential energy back into hydraulic or pneumatic energy and releases it to replenish the system again. Therefore, during the production process of the accumulator, it is necessary to conduct a pressure test on it to improve the quality of the accumulator and ensure the safety during its use.

[0003] In the process of sealing the accumulator by the existing accumulator pressure test bench, the process is relatively cumbersome, resulting in a low efficiency of the accumulator pressure test. Moreover, during the accumulator pressure test, it is necessary for manual monitoring of the installation position of the accumulator, resulting in a low degree of intelligence. Therefore, an accumulator pressure test bench and a test method thereof are proposed for the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an accumulator pressure test bench and a test method thereof, so as to solve the problems that the accumulator pressure test efficiency is low due to the cumbersome sealing process and the low degree of intelligence caused by the need for manual monitoring of the installation position of the accumulator during the test process.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An accumulator pressure test bench and a test method thereof, including a computer controller, an accumulator rack and a medium tank. The computer controller, the accumulator rack and the medium tank are fixedly connected through a threaded cap and a threaded rod. The top of the accumulator rack is fixedly connected with a servo motor, and the servo motor is fixedly connected with the accumulator through a servo oil cylinder valve group. The inner side of the top of the accumulator rack is fixedly connected with a servo two-way oil pump. The bottom end of the servo two-way oil pump is fixedly connected with an upper quick sealing connector through a fixed cross plate. The upper end of the fixed cross plate is fixedly connected with a guide post. The accumulator is fixedly connected with the upper quick sealing connector through a hose. An automatic centering and clamping system is arranged inside the lower end of the accumulator rack. An accumulator shell is arranged inside the automatic centering and clamping system. A lower quick sealing connector is arranged at the lower end of the accumulator shell. The top of the medium tank is fixedly connected with a servo pressure pump.

[0007] Preferably, mobile casters are provided at the four corners of the bottom end of the computer controller. A computer display screen and an operation panel are fixedly connected to the upper side of the front end of the computer controller. An alarm lamp is fixedly connected to the top end of the computer controller. There are 2 guiding columns in total, and the guiding columns are slidably connected to the top end of the energy storage platform.

[0008] Preferably, the automatic centering clamping system includes a fixed bracket. A linear motor is fixedly connected to the upper end inside the fixed bracket. The bottom end of the linear motor is fixedly connected to a slider. A cross bar is slidably connected to the middle of the slider. A clamping bracket is fixedly connected to the front end of the slider.

[0009] Preferably, a monitoring mechanism is fixedly connected to the middle inside of the fixed bracket. The monitoring mechanism includes a fixing plate. Radar rangefinders are slidably connected to the middle positions inside the left and right ends of the fixing plate. Rotating threaded rods are fixedly connected to the rear ends of the radar rangefinders. The rotating threaded rods are in screw connection with threaded tubes. The outer sides of both ends of the threaded tubes are fixedly connected to the fixing plate through positioning plates. A first bevel gear is fixedly connected to the middle outer side of the threaded tube. The first bevel gear is engaged with a second bevel gear. The second bevel gear is fixedly connected to the main shaft of a slow speed motor. The slow speed motor is fixedly connected inside a motor box. The motor box is fixedly connected to the fixing plate.

[0010] Preferably, there are two radar rangefinders in total. The radar rangefinders are arranged at the position between the sliders. The radar rangefinders, the rotating threaded rods and the threaded tubes are arranged coaxially.

[0011] Preferably, the computer controller is electrically connected to the alarm lamp, the servo double - acting oil pump, the accumulator, the servo motor, the automatic centering clamping system, the servo pressure pump and the monitoring mechanism.

[0012] Preferably, air inlets and fixing holes are respectively formed in the sides and the bottom ends of the lower quick - sealing connector and the upper quick - sealing connector. Cavities are respectively formed in the inner sides of the middle parts of the lower quick - sealing connector and the upper quick - sealing connector. Inner cores are connected to the inner sides of one ends of the lower quick - sealing connector and the upper quick - sealing connector close to the fixing holes through first sealing rings. Pistons are slidably connected to the outer sides of the inner cores through third sealing rings and fifth sealing rings. Second sealing rings are arranged on the outer sides of the pistons. Sealing gland covers are connected to the outer sides of the pistons through fourth sealing rings. Glands are arranged on the outer sides of the sealing gland covers. Sixth sealing rings are arranged on the inner sides of one ends of the sealing gland covers far from the fixing holes. A top head is connected to the upper end of the inner core through a seventh sealing ring. U - shaped sealing rings are arranged on the outer sides of the top head.

[0013] Preferably, there are 2 U - shaped sealing rings. The U - shaped sealing rings are semicircular. Through holes are formed in the inner sides of the top heads, and the U - shaped sealing rings and the through holes are arranged on the same horizontal plane.

[0014] Preferably, in step one: First, fixedly connect the computer controller, the energy storage bench, and the medium box through threaded caps and threaded rods. Then, there are a servo electro-hydraulic actuator system, an accumulator, a servo motor, and a servo oil cylinder valve group. Among them, the servo two-way oil pump is controlled by the servo motor to rotate forward and backward to fill and suck the rodless cavity and the rod cavity of the servo oil cylinder actuator, so as to realize the extension and retraction of the servo oil cylinder actuator. A pulse-type displacement sensor is installed at the tail of the servo oil cylinder actuator and feeds back to the computer control system. The computer control system controls the servo two-way pump to output precise oil volume to achieve the precise position of the movement of the servo oil cylinder actuator) rise to the set position, and then place the accumulator housing;

[0015] In step two: The automatic centering and clamping system clamps the accumulator housing. Then, seal the lower port of the accumulator housing through the lower quick-sealing connector. After the lower port is sealed, the servo pressure pump quickly fills the accumulator housing with liquid. After the filling is completed, the servo electro-hydraulic actuator system presses down to a position 0.5 mm away from the accumulator housing without external force pressing), and the upper quick-sealing connector seals the upper port of the accumulator housing. The servo pressure pump pressurizes the accumulator housing to the set pressure of 600 bar, and the servo pressure pump maintains the pressure in the accumulator housing for 1 minute, and the pressure holding ends;

[0016] The specific operations of the above-mentioned lower quick-sealing connector and the upper quick-sealing connector for sealing the lower end and the upper end of the accumulator housing are as follows: Compressed air is introduced into the air inlet, the piston is always in the extended state, the piston covers the U-shaped sealing ring and protects the U-shaped sealing ring. When the accumulator housing is inserted into the plug, the accumulator housing presses the piston, the sixth sealing ring is initially sealed with the end face of the accumulator housing, and presses the piston to retract. When the U-shaped sealing ring is inserted between the piston and the accumulator housing, the U-shaped sealing ring is not in the extended state, so it will not damage the U-shaped sealing ring, greatly extending the service life of the U-shaped sealing ring. After the accumulator housing is completely inserted, high-pressure medium is introduced into the cavity. There are through holes processed at the bottom of the U-shaped sealing ring on the plug. When the high-pressure medium is introduced, the high-pressure medium enters the inside of the U-shaped sealing ring through the through holes. Pressurizing inside the U-shaped sealing ring causes the U-shaped sealing ring to expand outward, and at the same time better seals the accumulator housing;

[0017] In step three: The servo pressure pump relieves the pressure of the accumulator housing, the servo electro-hydraulic actuator system rises to the set position, the automatic centering and clamping system releases the accumulator housing, and the accumulator housing is taken out to complete the test;

[0018] Among them, two radar rangefinders set during the clamping process of the automatic centering and clamping system for the accumulator housing can monitor the distance to the slider in real time. When the distances are equal, it means that the accumulator housing is clamped in the central position, which has a monitoring effect. At the same time, the positions of the radar rangefinders can be adjusted according to actual needs, which is convenient for later replacement and maintenance of the radar rangefinders from the front end of the automatic centering and clamping system.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In the present invention, through the computer controller, servo oil cylinder unit, servo oil pump, lower quick-sealing connector, upper quick-sealing connector and energy storage bench provided, the upper and lower ends of the energy storage housing can be quickly sealed during the test, effectively improving the test efficiency. At the same time, the placement of the accumulator housing can be monitored through the automatic locking system and monitoring system, making it more intelligent;

[0021] 2. In the present invention, through multiple independent integrated control units, it is more efficient, convenient for later maintenance, and the test pressure is precisely controlled. It is simple to install and easy to configure, with good practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic top view of the overall structure of the present invention;

[0024] Figure 3 is a schematic diagram of the internal structure of the lower quick-sealing connector of the present invention;

[0025] Figure 4 is a schematic diagram of the structure of the automatic centering clamping system of the present invention;

[0026] Figure 5 is a schematic diagram of the installation position structure of the radar rangefinder of the present invention;

[0027] Figure 6 is a schematic diagram of the installation position structure of the threaded pipe of the present invention.

[0028] In the figure: 1 - computer controller, 2 - computer display screen, 3 - operation panel, 4 - warning light, 5 - mobile caster, 6 - energy storage stand, 7 - servo oil cylinder unit, 8 - accumulator, 9 - servo motor, 10 - servo oil cylinder valve group, 11 - guide post, 12 - accumulator housing, 13 - automatic centering clamping system, 1301 - fixed bracket, 1302 - slider, 1303 - linear motor, 1304 - cross bar, 1305 - clamping bracket, 14 - medium tank, 15 - servo pressure pump, 16 - lower quick-sealing connector, 17 - upper quick-sealing connector, 18 - fixing hole, 19 - air inlet, 20 - threaded cap, 21 - threaded rod, 22 - first sealing ring, 23 - second sealing ring, 24 - piston, 25 - third sealing ring, 26 - inner core, 27 - gland, 28 - fourth sealing ring, 29 - sealing gland, 30 - fifth sealing ring, 31 - sixth sealing ring, 32 - seventh sealing ring, 33 - U-shaped sealing ring, 34 - head, 35 - monitoring mechanism, 3501 - fixing plate, 3502 - radar rangefinder, 3503 - rotating threaded rod, 3504 - threaded pipe, 3505 - positioning plate, 3506 - first bevel gear, 3507 - second bevel gear, 3508 - slow-speed motor, 3509 - motor box, 36 - cavity. Specific implementation mode

[0029] Example 1:

[0030] Please refer to Figure 1-6 , the present invention provides a technical solution:

[0031] An accumulator pressure test bench and its testing method, comprising a computer controller 1, an energy storage stand 6 and a medium tank 14. The computer controller 1, the energy storage stand 6 and the medium tank 14 are fixedly connected through a threaded cap 20 and a threaded rod 21. A servo motor 9 is fixedly connected to the top end of the energy storage stand 6. The servo motor 9 is fixedly connected to the accumulator 8 through a servo oil cylinder valve group 10. A servo two-way oil pump 7 is fixedly connected to the inner side of the top end of the energy storage stand 6. The bottom end of the servo two-way oil pump 7 is fixedly connected to the upper quick-sealing connector 17 through a fixed cross plate. A guide post 11 is fixedly connected to the upper end of the fixed cross plate. The accumulator 8 is fixedly connected to the upper quick-sealing connector 17 through a hose. An automatic centering clamping system 13 is arranged inside the lower end of the energy storage stand 6. An accumulator housing 12 is arranged inside the automatic centering clamping system 13. A lower quick-sealing connector 16 is arranged at the lower end of the accumulator housing 12. A servo pressure pump 15 is fixedly connected to the upper end of the medium tank 14.

[0032] At the four corners of the bottom end of the computer controller 1, moving casters 5 are provided. On the upper side of the front end of the computer controller 1, a computer display screen 2 and an operation panel 3 are fixedly connected. On the top end of the computer controller 1, an alarm lamp 4 is fixedly connected. There are a total of 2 guiding columns 11, and the guiding columns 11 are slidably connected to the top end of the energy storage stand 6. Such a setting can effectively improve the stability of the overall structure of the device during actual use; The automatic centering clamping system 13 includes a fixed bracket 1301. At the upper end inside the fixed bracket 1301, a linear motor 1303 is fixedly connected. The bottom end of the linear motor 1303 is fixedly connected to a slider 1302. A cross bar 1304 is slidably connected in the middle of the slider 1302. At the front end of the slider 1302, a clamping bracket 1305 is fixedly connected, which can clamp the accumulator housing 12; In the middle inside the fixed bracket 1301, a monitoring mechanism 35 is fixedly connected. The monitoring mechanism 35 includes a fixing plate 3501. At the middle positions inside the left and right ends of the fixing plate 3501, radar rangefinders 3502 are slidably connected. At the rear ends of the radar rangefinders 3502, rotating threaded rods 3503 are fixedly connected. The rotating threaded rods 3503 are helically connected to threaded tubes 3504. The outer sides of both ends of the threaded tubes 3504 are fixedly connected to the fixing plate 3501 through positioning plates 3505. On the outer side of the middle of the threaded tubes 3504, first bevel gears 3506 are fixedly connected. The first bevel gears 3506 are meshed with second bevel gears 3507. The second bevel gears 3507 are fixedly connected to the main shaft of a slow-speed motor 3508. The slow-speed motor 3508 is fixedly connected inside a motor box 3509. The motor box 3509 is fixedly connected to the fixing plate 3501, which can monitor the fixed position after clamping the accumulator shell 12; There are a total of two radar rangefinders 3502. The radar rangefinders 3502 are arranged at the position between the sliders 1302. The radar rangefinders 3502, the rotating threaded rods 3503, and the threaded tubes 3504 are arranged coaxially, which can ensure the stability during the position adjustment process of the radar rangefinders 3502; The computer controller 1 is electrically connected to the alarm lamp 4, the servo two-way oil pump 7, the accumulator 8, the servo motor 9, the automatic centering clamping system 13, the servo pressure pump 15, and the monitoring mechanism 35, which is convenient for controlling the internal devices through the computer controller 1;The lower quick-sealing connector 16 and the upper quick-sealing connector 17 are respectively provided with an air inlet 19 and a fixing hole 18 on the side and the bottom end. Cavities 36 are provided on the inner sides of the middle parts of the lower quick-sealing connector 16 and the upper quick-sealing connector 17. Inner cores 26 are connected to the inner sides of one ends of the lower quick-sealing connector 16 and the upper quick-sealing connector 17 close to the fixing hole 18 through first sealing rings 22. A piston 24 is slidably connected to the outer side of the inner core 26 through a third sealing ring 25 and a fifth sealing ring 30. A second sealing ring 23 is provided on the outer side of the piston 24. A sealing gland 29 is connected to the outer side of the piston 24 through a fourth sealing ring 28. A gland 27 is provided on the outer side of the sealing gland 29. A sixth sealing ring 31 is provided on the inner side of one end of the sealing gland 29 far from the fixing hole 18. The upper end of the inner core 26 is connected to a top head 34 through a seventh sealing ring 32. A U-shaped sealing ring 33 is provided on the outer side of the top head 34, which can seal the upper and lower openings of the accumulator housing 12 during the test of the accumulator housing 12; There are 2 U-shaped sealing rings 33, and the U-shaped sealing rings 33 are semicircularly arranged. A through hole is provided in the inner side of the top head 34, and the U-shaped sealing rings 33 and the through hole are arranged on the same horizontal plane. When high-pressure medium is introduced, the high-pressure medium enters the inside of the U-shaped sealing rings 33 through the through hole, and the U-shaped sealing rings 33 expand outwards under the pressure inside the U-shaped sealing rings 33, and at the same time, the accumulator housing 12 is better sealed.;

[0033] Step 1: First, the computer controller 1, the accumulator test bench 6 and the medium tank 14 are fixedly connected through a threaded cap 20 and a threaded rod 21. Then, the servo electro-hydraulic actuator system specifically includes a servo two-way oil pump 7, an accumulator 8, a servo motor 9 and a servo oil cylinder valve group 10. Among them, the servo two-way oil pump 7 is controlled to rotate forward and reverse by the servo motor 9 to fill and suck the rodless cavity and the rodless cavity of the servo oil cylinder actuator, so as to realize the extension and retraction of the servo oil cylinder actuator. A pulse-type displacement sensor is provided at the tail of the servo oil cylinder actuator and is fed back to the computer control system 1. The computer control system 1 controls the servo two-way pump 7 to output accurate oil volume to reach the accurate position of the movement of the servo oil cylinder actuator rising to the set position and set the origin, and then the accumulator housing is placed manually / automatically;

[0034] Step 2: The automatic centering and clamping system 13 clamps the accumulator housing 12, and then the lower quick-sealing connector 16 seals the lower port of the accumulator housing 12. After the lower port is sealed, the servo pressure pump 15 quickly fills the accumulator housing 12 with liquid. After the liquid filling is completed, the servo electro-hydraulic actuator system presses down to a position 0.5 mm away from the accumulator housing 12 without external force pressing. The upper quick-sealing connector 17 seals the upper port of the accumulator housing 12. The servo pressure pump 15 pressurizes the accumulator housing 12 to the set pressure of 600 bar, and the servo pressure pump 15 keeps the pressure in the accumulator housing 12 for 1 minute, and the pressure holding ends;

[0035] Among them, the specific operations of the lower quick-sealing connector 16 and the upper quick-sealing connector 17 for sealing the lower end and the upper end of the accumulator housing 12 are as follows: Compressed air is introduced into the air inlet 19, the piston 24 is always in the extended state, the piston 24 covers the U-shaped sealing ring 33 and protects the U-shaped sealing ring 33. When the accumulator housing 12 is inserted into the top head 34, the accumulator housing 12 presses the piston 24, the sixth sealing ring 31 is initially sealed with the end face of the accumulator housing 12, and presses the piston 24 to retract. When the U-shaped sealing ring 33 is inserted between the piston 24 and the accumulator housing 12, the U-shaped sealing ring 33 is not in the extended state, so it will not damage the U-shaped sealing ring 33, greatly extending the service life of the U-shaped sealing ring 33. After the accumulator housing 12 is completely inserted, high-pressure medium is introduced into the cavity 36. A through hole is processed at the bottom of the U-shaped sealing ring 33 on the top head 34. When the high-pressure medium is introduced, the high-pressure medium enters the inside of the U-shaped sealing ring 33 through the through hole, pressurizes the inside of the U-shaped sealing ring 33 to expand the U-shaped sealing ring 33 outward, and at the same time better seals the accumulator housing 12;

[0036] Step 3: The servo pressure pump 15 relieves the pressure of the accumulator housing 12, the servo electro-hydraulic actuator system rises to the set position to set the origin, the automatic centering and clamping system 13 releases the accumulator housing 12, and the accumulator housing 12 is taken out to complete the test;

[0037] Among them, two radar rangefinders 3502 provided by the automatic centering and clamping system 13 during the process of clamping the accumulator housing 12 can monitor the distance to the slider 1302 in real time. When the distances are equal, it means that the accumulator housing 12 is clamped in the central position, which has the effect of monitoring. At the same time, the position of the radar rangefinder 3502 can be adjusted according to actual needs, which is convenient for later replacement and maintenance of the radar rangefinder 3502 from the front end of the automatic centering and clamping system 13.

[0038] In this article, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation mode of the present invention. It should be noted that due to the limited nature of written expression, and objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. An accumulator pressure test bench, comprising a computer controller (1), an accumulator bench (6) and a medium tank (14), characterized in that: The computer controller (1), the energy storage rack (6) and the medium box (14) are fixedly connected by a threaded nut (20) and a threaded rod (21). A servo motor (9) is fixedly connected to the top of the energy storage rack (6). The servo motor (9) is fixedly connected to an accumulator (8) through a servo oil cylinder valve group (10). A servo double-direction oil pump (7) is fixedly connected to the inner side of the top of the energy storage rack (6). The bottom of the servo double-direction oil pump (7) is fixedly connected to an upper quick-sealing connector (17) through a fixed cross plate. A guide post (11) is fixedly connected to the upper end of the fixed cross plate. The accumulator (8) is connected to the upper quick-sealing connector (17) through a hose. An automatic centering clamping system (13) is arranged inside the lower end of the energy storage rack (6). An accumulator housing (12) is arranged inside the automatic centering clamping system (13). A lower quick-sealing connector (16) is arranged at the lower end of the accumulator housing (12). A servo pressure pump (15) is fixedly connected to the upper end of the medium box (14); The automatic centering clamping system (13) includes a fixed bracket (1301). A linear motor (1303) is fixedly connected to the upper end inside the fixed bracket (1301). The bottom end of the linear motor (1303) is fixedly connected to a slider (1302). A cross bar (1304) is slidably connected to the middle of the slider (1302). A clamping bracket (1305) is fixedly connected to the front end of the slider (1302); A monitoring mechanism (35) is fixedly connected to the middle inside the fixed bracket (1301). The monitoring mechanism (35) includes a fixing plate (3501). Radar rangefinders (3502) are slidably connected to the middle positions inside the left and right ends of the fixing plate (3501). Rotating threaded rods (3503) are fixedly connected to the rear ends of the radar rangefinders (3502). The rotating threaded rods (3503) are in screw connection with threaded tubes (3504). The outer sides of both ends of the threaded tubes (3504) are fixedly connected to the fixing plate (3501) through positioning plates (3505). A first bevel gear (3506) is fixedly connected to the middle outer side of the threaded tube (3504). The first bevel gear (3506) is engaged with a second bevel gear (3507). The second bevel gear (3507) is fixedly connected to the main shaft of a slow-speed motor (3508). The slow-speed motor (3508) is fixedly connected inside a motor box (3509). The motor box (3509) is fixedly connected to the fixing plate (3501); The lower quick-sealing connector (16) and the upper quick-sealing connector (17) are respectively provided with an air inlet (19) and a fixing hole (18) on the side and bottom ends. Cavities (36) are provided on the inner sides of the middle parts of the lower quick-sealing connector (16) and the upper quick-sealing connector (17). Inner cores (26) are connected to the inner sides of one ends of the lower quick-sealing connector (16) and the upper quick-sealing connector (17) close to the fixing hole (18) through first sealing rings (22). Pistons (24) are slidably connected to the outer sides of the inner cores (26) through third sealing rings (25) and fifth sealing rings (30). Second sealing rings (23) are arranged on the outer sides of the pistons (24). Sealing gland covers (29) are connected to the outer sides of the pistons (24) through fourth sealing rings (28). Gland covers (27) are arranged on the outer sides of the sealing gland covers (29). Sixth sealing rings (31) are arranged on the inner sides of one ends of the sealing gland covers (29) far from the fixing hole (18). The upper ends of the inner cores (26) are connected to a top head (34) through seventh sealing rings (32). U-shaped sealing rings (33) are arranged on the outer sides of the top head (34).

2. The accumulator pressure test bench according to claim 1, characterized in that: Mobile casters (5) are provided at the four corners of the bottom end of the computer controller (1). A computer display screen (2) and an operation panel (3) are fixedly connected to the upper side of the front end of the computer controller (1). An alarm lamp (4) is fixedly connected to the top end of the computer controller (1). There are a total of 2 guiding columns (11), and the guiding columns (11) are slidably connected to the top ends of the energy storage bench frames (6).

3. The accumulator pressure test bench according to claim 1, characterized in that: There are a total of two radar rangefinders (3502), and the radar rangefinders (3502) are arranged at the position between the sliders (1302). The radar rangefinders (3502), the rotating threaded rods (3503), and the threaded pipes (3504) are coaxially arranged.

4. The accumulator pressure test bench according to claim 1, characterized in that: The computer controller (1) is electrically connected to the alarm lamp (4), the servo two-way oil pump (7), the servo motor (9), the automatic centering clamping system (13), the servo pressure pump (15), and the monitoring mechanism (35).

5. The accumulator pressure test bench according to claim 1, characterized in that: There are 2 U-shaped sealing rings (33), and the U-shaped sealing rings (33) are semicircularly arranged. Through holes are provided on the inner sides of the top head (34), and the U-shaped sealing rings (33) and the through holes are arranged on the same horizontal plane.

6. According to the testing method of an accumulator pressure test bench according to claim 1, it is characterized in that: Step 1: First, fixedly connect the computer controller (1), the energy storage rack (6), and the medium box (14) through a threaded cap (20) and a threaded rod (21). Then, the servo electro-hydraulic actuator system rises to the set position, and then the accumulator shell is placed. The servo electro-hydraulic actuator system specifically includes a servo two-way oil pump (7), an accumulator (8), a servo motor (9), and a servo oil cylinder valve group (10). Among them, the servo two-way oil pump (7) is controlled to rotate forward and reverse by the servo motor (9) to fill and suck the rodless cavity and the rod cavity of the servo oil cylinder actuator, so as to realize the extension and retraction of the servo oil cylinder actuator. A pulse-type displacement sensor is provided at the tail of the servo oil cylinder actuator and feeds back to the computer controller (1). The computer controller (1) controls the servo two-way oil pump (7) to output accurate oil volume to achieve the accurate position of the servo oil cylinder actuator movement. Step 2: The automatic centering clamping system (13) clamps the accumulator shell (12). Then, seal the lower port of the accumulator shell (12) through the lower quick-sealing connector (16). After the lower port is sealed, the servo pressure pump (15) quickly fills the accumulator shell (12) with liquid. After the filling is completed, the servo electro-hydraulic actuator system presses down to a position 0.5 mm away from the accumulator shell (12). The upper quick-sealing connector (17) seals the upper port of the accumulator shell (12). The servo pressure pump (15) pressurizes the accumulator shell (12) to the set pressure of 600 bar, and the servo pressure pump (15) maintains the pressure in the accumulator shell (12) for 1 minute, and the pressure holding ends. Among them, the specific operations of the above-mentioned lower quick-sealing connector (16) and upper quick-sealing connector (17) for sealing the lower and upper ends of the accumulator shell (12) are as follows: Compressed air is introduced into the air inlet (19), and the piston (24) is always in the extended state. The piston (24) covers the U-shaped sealing ring (33) and protects the U-shaped sealing ring (33). When the accumulator shell (12) is inserted into the plug (34), the accumulator shell (12) presses the piston (24). The sixth sealing ring (31) is initially sealed with the end face of the accumulator shell (12) and presses the piston (24) to retract. When the U-shaped sealing ring (33) is inserted between the piston (24) and the accumulator shell (12), the U-shaped sealing ring (33) is not in the extended state, so it will not damage the U-shaped sealing ring (33), greatly extending the service life of the U-shaped sealing ring (33). After the accumulator shell (12) is completely inserted, high-pressure medium is introduced into the cavity (36). A through hole is processed at the bottom of the U-shaped sealing ring (33) on the plug (34). When high-pressure medium is introduced, the high-pressure medium enters the inside of the U-shaped sealing ring (33) through the through hole. Pressurizing inside the U-shaped sealing ring (33) causes the U-shaped sealing ring (33) to expand outwards, and at the same time better seals the accumulator shell (12). Step 3: The servo pressure pump (15) relieves the pressure of the accumulator shell (12). The servo electro-hydraulic actuator system rises to the set position. The automatic centering clamping system (13) releases the accumulator shell (12), and the accumulator shell (12) is taken out to complete the test. Among them, during the clamping process of the accumulator housing (12) by the automatic centering clamping system (13), two radar rangefinders (3502) are set to monitor the distance to the slider (1302) in real time. When the distances are equal, it indicates that the accumulator housing (12) is clamped at the central position, achieving the monitoring effect. At the same time, the position of the radar rangefinder (3502) is adjusted according to actual requirements, which facilitates the replacement and maintenance of the radar rangefinder (3502) from the front end of the automatic centering clamping system (13) in the later stage.

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