Tool for detecting pressure maintaining capability of oil pressure component

Abstract

The utility model relates to the technical field of oil pressure component detection devices, in particular to an oil pressure component pressure maintaining capacity detection tool which comprises a mounting plate and an oil tank, a driving pump and a stop valve are arranged on the mounting plate, and an oil inlet of the driving pump is connected with an oil outlet of the oil tank through an oil pipe. An oil outlet of the driving pump is connected with the stop valve through a pipeline, the mounting plate is provided with a detection position used for mounting a to-be-detected piece, the detection position is located at the oil outlet of the stop valve, the detection position is provided with a mounting hole used for mounting the to-be-detected piece, and the oil tank is further provided with an oil return opening used for being connected with the oil outlet of the to-be-detected piece. According to the utility model, off-line detection of the pressure maintaining performance after sealing replacement of the oil pressure component can be realized, effectiveness after maintenance of the oil pressure component and replacement of the sealing component is ensured, the detection process is fast and efficient, and the detection result is reliable.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic component testing devices, and more specifically, to a tooling for testing the pressure holding capacity of hydraulic components. Background Technology

[0002] Current stamping production lines utilize numerous hydraulically driven components powered by hydraulic oil, such as hydraulic cylinders, hydraulic pumps, and hydraulic clamps. These hydraulic components require high internal sealing performance; prolonged use can lead to seal aging, wear from oil impurities, and other causes, resulting in decreased sealing performance and component failure. To ensure the normal performance of hydraulic components, stamping production lines currently primarily employ periodic aging replacements of hydraulic cylinders, pumps, and other components, or replacement of internal seals. Since most hydraulic component failures are due to internal seal damage, replacing seals is an effective way to reduce spare parts replacement costs. However, currently, there are no effective offline testing methods for verifying the effectiveness of replaced internal seals in hydraulic components; testing must be performed after reassembly. This method wastes maintenance time, and if abnormalities are found after seal replacement, it may damage other components in the hydraulic system, posing a risk of escalating the problem. Therefore, there is an urgent need for a device capable of testing the pressure-holding capacity of hydraulic components. Utility Model Content

[0003] To address the technical problem of the lack of equipment for testing the pressure holding capacity of hydraulic components in the existing technology, this utility model provides a tooling for testing the pressure holding capacity of hydraulic components. This utility model can realize offline testing of the pressure holding performance of hydraulic components after seal replacement, ensuring the effectiveness of hydraulic component repair and seal replacement, and the testing process is fast and efficient with reliable test results.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a pressure holding capacity testing fixture for hydraulic components, including a mounting plate and an oil tank. The mounting plate is provided with a drive pump and a shut-off valve. The oil inlet of the drive pump is connected to the oil outlet of the oil tank through an oil pipe. The oil outlet of the drive pump is connected to the shut-off valve through a pipe. The mounting plate is provided with a detection position for mounting the test piece. The detection position is located at the oil outlet of the shut-off valve. The detection position is provided with a mounting hole for mounting the test piece. The oil tank is also provided with a return oil port for connecting to the oil outlet of the test piece.

[0005] In this technical solution, the mounting plate is used to integrate and install various components. The test piece (DPT) can also be installed on the detection position on the mounting plate to ensure the stability of the DPT during testing and improve the accuracy of the test. The oil tank supplies oil for the testing process and recovers oil. A drive pump and a shut-off valve are mounted on the mounting plate. The inlet of the drive pump is connected to the outlet of the oil tank via an oil pipe. The drive pump pumps oil from the tank and pumps it into the shut-off valve. The shut-off valve is connected to the inlet of the DPT to control the flow of oil into the DPT, thus preventing oil leakage when not in use. The detection position on the mounting plate has mounting holes. The DPT can be fastened to the mounting holes with bolts to be installed on the detection position. The installation process is simple, quick, and easy to disassemble, facilitating rapid installation, removal, and replacement of the DPT by operators, improving testing efficiency. The detection position is located next to the shut-off valve, and the inlet of the DPT installed on the detection position can be directly connected to the shut-off valve. The outlet of the DPT is connected to the return port on the oil tank, thus forming an oil circuit loop. When testing the test piece, first, install the test piece in the testing position and connect it to the shut-off valve using the fastening bolts and mounting holes. Connect the oil outlet of the test piece to the oil return port of the oil tank via an oil pipe. Then, open the shut-off valve and start the drive pump. The drive pump pumps oil into the test piece until the oil pressure inside reaches the preset value. Then, control the drive pump to maintain a stable oil pressure inside the test piece for 10 to 15 minutes. If no oil overflows from the surface of the test piece during this process, it indicates that the pressure holding capacity of the test piece is qualified. After the test is completed, the operator controls the drive pump to extract the oil from the test piece, then closes the shut-off valve, disconnects the oil pipe from the test piece, and finally removes the test piece from the testing position, thus completing the test of the test piece.

[0006] Preferably, the mounting plate is further provided with an oil distributor and a pressure gauge. The oil distributor is located between the drive pump and the shut-off valve. The oil distributor has multiple oil distribution ports. The oil outlet of the drive pump, the oil inlet of the shut-off valve, and the pressure gauge are all connected to the oil distribution ports through oil pipes.

[0007] Preferably, the mounting plate is also equipped with an unloading valve, the oil inlet of the unloading valve is connected to the oil distribution port through an oil pipe, the oil outlet of the unloading valve is connected to the oil return port of the oil tank through an oil pipe, and the unloading valve also has a closable unloading port.

[0008] Preferably, at least two detection positions are provided, and the number of shut-off valves matches the number of detection positions.

[0009] Preferably, the drive pump is a pneumatic pump, and the air inlet of the drive pump is connected to an external air source through an air pipe.

[0010] Preferably, the mounting plate is further provided with a pneumatic triplet, the air inlet of which is connected to an external air source through an air pipe, and the air inlet of the drive pump is connected to the air outlet of the pneumatic triplet through an air pipe.

[0011] Preferably, the oil tank is further provided with an extended detection device, the unloading valve is connected to the oil distribution port through the second oil distributor, and the extended detection device is connected to the second oil distributor and the external test object through oil pipes respectively.

[0012] Preferably, the expansion detection device includes a manual control valve, an oil supply port, and a second oil return port. The manual control valve is connected to the second oil distributor via an oil pipe. The two ends of the oil supply port are respectively connected to the manual control valve and the external test piece via pipes. The two ends of the second oil return port are respectively connected to the manual control valve and the oil tank via oil pipes.

[0013] Preferably, the vehicle also includes a vehicle body, the upper surface of which is a mounting platform, the mounting plate and the fuel tank are mounted on the mounting platform, the bottom surface of which is also provided with multiple casters, and the vehicle body is also provided with a handle that can be pushed manually.

[0014] Preferably, the mounting surface is also provided with an oil drain hole.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: In this utility model, all components and the test piece are integrated and mounted on the mounting plate, ensuring the stability of the state of each part during the testing process and ensuring the accuracy of the test. A drive pump is provided to pump oil into the test piece and maintain oil pressure. A shut-off valve is provided to open and close the oil circuit to ensure that the oil does not leak accidentally. The test piece is mounted on the mounting hole located at the testing position by fastening bolts, which facilitates the quick installation, disassembly, and replacement of the test piece by the operator, thereby improving testing efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the pressure-holding capacity testing fixture for hydraulic components of this utility model;

[0017] Figure 2 This is a schematic diagram of the pneumatic triplet in the hydraulic component pressure holding capacity testing fixture of this utility model;

[0018] Figure 3 This is a schematic diagram of the oil tank in the hydraulic component pressure holding capacity testing fixture of this utility model.

[0019] In the attached diagram: 1. Mounting plate; 2. Oil tank; 3. Drive pump; 4. Shut-off valve; 5. Oil distributor; 6. Pressure gauge; 7. Unloading valve; 8. Pneumatic triplet; 9. Extended detection device; 11. Detection position; 12. Moving wheel; 13. Handle; 14. Oil leak hole; 15. Vehicle body; 91. Manual control valve; 92. Oil supply connector; 93. Second oil return port. Detailed Implementation

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0023] Example 1

[0024] like Figure 1 , 2As shown, a pressure-holding capacity testing fixture for hydraulic components includes a mounting plate 1 and an oil tank 2. The mounting plate 1 is equipped with a drive pump 3 and a shut-off valve 4. The oil inlet of the drive pump 3 is connected to the oil outlet of the oil tank 2 via an oil pipe, and the oil outlet of the drive pump 3 is connected to the shut-off valve 4 via a pipe. A detection position 11 is provided on the mounting plate 1, located at the oil outlet of the shut-off valve 4. The detection position 11 has a mounting hole for mounting the component under test. The oil tank 2 also has a return port for connecting to the oil outlet of the component under test. The mounting plate 1 is used to integrate and mount various components. During testing, the component under test is mounted on the detection position 11 on the mounting plate 1 to ensure that the state of the component under test remains stable during the testing process, thereby improving the accuracy of the test. The oil tank 2 supplies oil for the testing process and recovers oil. The mounting plate 1 is equipped with a drive pump 3 and a shut-off valve 4. The inlet of the drive pump 3 is connected to the outlet of the oil tank 2 via an oil pipe. The drive pump 3 can pump oil from the oil tank 2 and pump it into the shut-off valve 4. The shut-off valve 4 is connected to the inlet of the test piece (DPT) to control the flow of oil into the DPT, thus preventing oil leakage when not in use. The mounting plate 1 has a mounting hole at the detection position 11. The DPT can be installed on the detection position 11 by fastening bolts to the mounting hole. The installation process is simple, quick, and easy to disassemble, facilitating rapid installation, removal, and replacement of the DPT by operators, thus improving testing efficiency. The detection position 11 is located next to the shut-off valve 4, and the inlet of the DPT installed on the detection position 11 can be directly connected to the shut-off valve 4. The outlet of the DPT is connected to the return port on the oil tank 2, thus forming an oil circuit loop. When testing the test piece, first, the test piece is installed on the testing position 11 and connected to the shut-off valve 4 using fastening bolts and mounting holes. The oil outlet of the test piece is connected to the oil return port of the oil tank 2 via an oil pipe. Then, the shut-off valve 4 is opened and the drive pump 3 is started. The drive pump 3 pumps oil into the test piece until the oil pressure inside the test piece reaches the preset value. Then, the drive pump 3 is controlled to maintain a stable oil pressure inside the test piece for 10 to 15 minutes. If no oil overflows from the surface of the test piece during this process, it indicates that the pressure holding capacity of the test piece is qualified. After the test is completed, the operator controls the drive pump 3 to extract the oil from the test piece, then closes the shut-off valve 4, disassembles the oil pipe on the test piece, and finally removes the test piece from the testing position 11, thus completing the test of the test piece.

[0025] like Figure 1As shown, the mounting plate 1 is also equipped with an oil distributor 5 and a pressure gauge 6. The oil distributor 5 is located between the drive pump 3 and the shut-off valve 4. The oil distributor 5 has multiple oil distribution ports. The oil outlet of the drive pump 3, the oil inlet of the shut-off valve 4, and the pressure gauge 6 are all connected to the oil distribution ports through oil pipes. The oil distributor 5 is used to expand the oil circuit and ensure that each oil circuit receives oil with equal oil pressure. The oil distribution ports of the oil distributor 5 are connected to the pressure gauge 6. The oil pressure at the pressure gauge 6 is the same as the oil pressure distributed by the oil distributor 5 towards the test piece. The operator can determine the oil pressure in the test piece by observing the oil pressure at the pressure gauge 6.

[0026] like Figure 1 As shown, an unloading valve 7 is also installed on the mounting plate 1. The oil inlet of the unloading valve 7 is connected to the oil distributor port via an oil pipe, and the oil outlet of the unloading valve is connected to the return port of the oil tank 2 via an oil pipe. The unloading valve 7 also has a closable unloading port. The unloading valve 7 is used to purge the air inside the fixture from the unloading port before testing the workpiece, thereby preventing air from affecting the test results. After the air is purged, the operator closes the unloading port, allowing the fixture to test the workpiece normally.

[0027] like Figure 1 As shown, at least two detection positions 11 are provided, and the number of shut-off valves 4 matches the number of detection positions 11. By setting at least two detection positions 11, a single fixture can inspect at least two parts at a time, greatly improving inspection efficiency and saving inspection time.

[0028] like Figure 1 As shown, the drive pump 3 is a pneumatic pump, and its air inlet is connected to an external air source via an air pipe. The pneumatic pump can flexibly adjust the amount and pressure of the pumped oil, making it convenient for operators to adjust the oil pressure pumped into the test piece.

[0029] like Figure 1 , 2 As shown, the mounting plate 1 is also equipped with a pneumatic triplet 8. The air inlet of the pneumatic triplet 8 is connected to an external air source through an air pipe, and the air inlet of the drive pump 3 is connected to the air outlet of the pneumatic triplet 8 through an internal air pipe. The pneumatic triplet 8 is a combination of a filter, a pressure reducing valve, and an oil mist lubricator. The external air source is connected to the drive pump 3 through the pneumatic triplet 8. The filter in the pneumatic triplet 8 can filter out impurities such as moisture, oil mist, and dust contained in the air supplied by the air source, preventing damage to the drive pump 3. The pressure reducing valve can adjust the amount of air entering through the pneumatic triplet 8, thereby adjusting the working state of the drive pump 3. The oil mist lubricator can mix lubricating oil mist into the gas to lubricate the internal parts of the drive pump 3.

[0030] Example 2

[0031] This embodiment is similar to Embodiment 1 above, except that, as Figure 1, 3 As shown, the oil tank 2 is also equipped with an extended detection device 9. The unloading valve 7 is connected to the oil distributor port through the second oil distributor. The extended detection device 9 is connected to the second oil distributor and the external test piece through oil pipes. Some test pieces are too large or have special specifications to be installed on the detection position 11 on the mounting plate 1, and can only be placed outside the tooling. These test pieces are external test pieces, so an extended detection device 9 is needed. The extended detection device 9 can be directly connected to the external test piece through oil pipes to achieve detection.

[0032] like Figure 1 , 3 As shown, the expansion testing device 9 includes a manual control valve 91, an oil supply port 92, and a second oil return port 93. The manual control valve 91 is connected to the second oil distributor via an oil pipe. The two ends of the oil supply port 92 are connected to the manual control valve 91 and the external test piece via pipes, respectively. The two ends of the second oil return port 93 are connected to the manual control valve 91 and the oil tank 2 via oil pipes, respectively. The manual control valve 91 is used to regulate the oil circuit. When it is necessary to test the external test piece, the operator controls the manual control valve 91 to connect the oil supply port to the second oil distributor. Oil flows from the second oil distributor through the manual control valve 91 and the oil supply port 92 into the external test piece until the oil pressure in the external test piece reaches the preset value. This pressure is then maintained for 10 to 15 minutes. If no oil overflows from the surface of the test piece during this process, it indicates that the pressure holding capacity of the external test piece is qualified. After the test is completed, the staff operates the manual control valve 91 to connect the second oil return port 93 with the oil supply port 92. The oil in the external test piece is drawn back into the oil tank 2 through the oil supply port 92, the manual control valve 91 and the second oil return port 93 in sequence.

[0033] Example 3

[0034] This embodiment is similar to Embodiment 1 above, except that, as Figure 1 As shown, the device also includes a vehicle body 15, the upper surface of which is a mounting platform. The mounting plate 1 and the oil tank 2 are both mounted on the mounting platform. The bottom surface of the vehicle body 15 is also equipped with multiple casters 12, and the vehicle body 15 is also equipped with a handle 13 for manual pushing. By providing casters 12 and handles 13, it is convenient for workers to move and transport the tooling quickly, thus enhancing the practicality of the tooling.

[0035] like Figure 1 As shown, an oil drain hole 14 is also provided on the mounting platform. If the test piece leaks oil during the testing process, the leaked oil will drip onto the mounting platform. The oil drain hole 14 makes it easy for staff to collect the leaked oil.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fixture for testing the pressure holding capacity of hydraulic components, characterized in that, The device includes a mounting plate (1) and an oil tank (2). The mounting plate (1) is equipped with a drive pump (3) and a shut-off valve (4). The oil inlet of the drive pump (3) is connected to the oil outlet of the oil tank (2) through an oil pipe. The oil outlet of the drive pump (3) is connected to the shut-off valve (4) through a pipe. The mounting plate (1) is equipped with a detection position (11) for installing the test piece. The detection position (11) is located at the oil outlet of the shut-off valve (4). The detection position (11) is equipped with a mounting hole for installing the test piece. The oil tank (2) is also equipped with a return oil port for connecting to the oil outlet of the test piece.

2. The pressure-holding capacity testing fixture for hydraulic components according to claim 1, characterized in that, The mounting plate (1) is also provided with an oil distributor (5) and a pressure gauge (6). The oil distributor (5) is located between the drive pump (3) and the shut-off valve (4). The oil distributor (5) has multiple oil distribution ports. The oil outlet of the drive pump (3), the oil inlet of the shut-off valve (4) and the pressure gauge (6) are all connected to the oil distribution ports through oil pipes.

3. The pressure holding capacity testing fixture for hydraulic components according to claim 2, characterized in that, The mounting plate (1) is also equipped with an unloading valve (7). The oil inlet of the unloading valve (7) is connected to the oil distribution port through an oil pipe, and the oil outlet of the unloading valve is connected to the oil return port of the oil tank (2) through an oil pipe. The unloading valve (7) also has a closable unloading port.

4. The pressure-holding capacity testing fixture for hydraulic components according to claim 1, characterized in that, At least two detection positions (11) are provided, and the number of shut-off valves (4) matches the number of detection positions (11).

5. The pressure holding capacity testing fixture for hydraulic components according to claim 1, characterized in that, The drive pump (3) is a pneumatic pump, and the air inlet of the drive pump (3) is connected to an external air source through an air pipe.

6. The pressure holding capacity testing fixture for hydraulic components according to claim 5, characterized in that, The mounting plate (1) is also provided with a pneumatic triplet (8). The air inlet of the pneumatic triplet (8) is connected to an external air source through an air pipe, and the air inlet of the drive pump (3) is connected to the air outlet of the pneumatic triplet (8) through an air pipe.

7. The pressure holding capacity testing fixture for hydraulic components according to claim 3, characterized in that, An extended detection device (9) is also provided on the oil tank (2). The unloading valve (7) is connected to the oil distribution port through the second oil distributor. The extended detection device (9) is connected to the second oil distributor and the external test piece through oil pipes.

8. The pressure holding capacity testing fixture for hydraulic components according to claim 7, characterized in that, The extended detection device (9) includes a manual control valve (91), an oil supply port (92), and a second oil return port (93). The manual control valve (91) is connected to the second oil distributor via an oil pipe. The two ends of the oil supply port (92) are connected to the manual control valve (91) and the external test piece via pipes, respectively. The two ends of the second oil return port (93) are connected to the manual control valve (91) and the oil tank (2) via oil pipes, respectively.

9. The pressure holding capacity testing fixture for hydraulic components according to claim 1, characterized in that, It also includes a vehicle body (15), the upper surface of which is a mounting platform, the mounting plate (1) and the fuel tank (2) are both mounted on the mounting platform, the bottom surface of the vehicle body (15) is also provided with multiple casters (12), and the vehicle body (15) is also provided with a handle (13) that can be pushed by manpower.

10. The pressure holding capacity testing fixture for hydraulic components according to claim 9, characterized in that, The mounting platform is also provided with an oil drain hole (14).

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