Hydraulic valve testing device

Abstract

The utility model belongs to the technical field of hydraulic valves, and discloses a hydraulic valve testing device. Comprising a testboard, a placement assembly, a hydraulic oil pump, an oil tank and a filter tank, and a hydraulic valve is placed at the middle end of the top of the testboard through the placement assembly. The filter box and the filter screen are additionally arranged, leaked oil and oil in the hydraulic valve are filtered through the filter screen and then recycled into the filter box, the oil enters the oil tank through the connecting pipe to be recycled, and compared with the mode that only tested oil in the hydraulic valve is recycled, it can be avoided that when an unqualified hydraulic valve is encountered, the oil in the hydraulic valve is recycled, and the oil in the hydraulic valve is recycled. The telescopic pipe and the installation cover are additionally arranged, the telescopic pipe can stretch out and draw back to adjust the length when meeting hydraulic valves of different sizes, clamping and fixing of the hydraulic valves of different sizes are achieved, compared with a motor driving mode, the hydraulic valve disassembling device is simpler and more convenient, the time for disassembling the hydraulic valves is shortened, and the working efficiency is improved. The testing efficiency of the hydraulic valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valves, and more specifically, to a hydraulic valve testing device. Background Art

[0002] A hydraulic valve is an automated component operated by pressurized oil. It is controlled by the pressure oil of a pressure regulating valve and is usually used in combination with an electromagnetic pressure regulating valve. It can be used to remotely control the on / off of oil, gas, and water pipeline systems in hydropower stations. Before leaving the factory, hydraulic valves need to be tested for performance, quality, air tightness, and pressure in order to meet requirements.

[0003] Publication No.: CN218271277U proposes a hydraulic valve testing device, including a test bench, an oil cylinder is arranged under the test bench, a heating pipe and a water temperature gauge are arranged in the oil cylinder, a booster pump is arranged under the test bench, an oil inlet pipe and an oil outlet pipe are respectively connected to the two ends of the booster pump, the oil outlet pipe is connected to a tee, the tee is respectively connected to an air intake pipe and a telescopic pipe, the air intake pipe is connected to the air pump, a moving rod is arranged on the telescopic pipe, a slide groove is arranged on the test bench, a motor is arranged under the test bench, a screw rod is connected to the lower end of the moving rod through the output shaft of the motor, a connecting rod is arranged under the test bench, a fixed rod is arranged on the side of the test bench, an oil return pipe is arranged on the fixed rod, a filter box is arranged on the oil cylinder, the oil return pipe passes through the test bench and is connected to the filter box, and a filter box is arranged on the air intake pipe. The surface is provided with an air pressure sensor, the oil outlet pipe is provided with a pressure sensor, and the test bench is provided with a controller. The advantages of the utility model include testing air tightness and practicability, improving actual measurement effect and testing convenience. When the test device is in use, the oil after the internal test of the hydraulic valve can be recycled, but when encountering an unqualified hydraulic valve, it is easy to cause oil leakage and drip onto the test bench. The oil on the test bench is difficult to clean up quickly and will drip onto the ground, resulting in oil waste, increasing the testing cost, and the hydraulic valve needs to start the motor to be taken out, and the motor drives the screw rod to rotate. The screw rod needs to be rotated several times to release the fixation of the hydraulic valve. The time for disassembling the hydraulic valve is long, thereby reducing the testing efficiency of the hydraulic valve. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a hydraulic valve testing device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic valve testing device, comprising a test bench, a placement component, a hydraulic oil pump, an oil tank and a filter box, a hydraulic valve is placed on the middle end of the top of the test bench through the placement component, a hydraulic oil pump is installed at one end of the top of the test bench, an oil outlet pipe is installed at the other end of the top of the test bench, the output end of the hydraulic oil pump and the upper end of the oil outlet pipe are both connected with a telescopic pipe, the output end of the hydraulic oil pump and the upper end of the oil outlet pipe are also installed with a hydraulic gauge, one end of the two telescopic pipes are connected with a mounting cover, an oil tank is installed at the bottom of the test bench, an oil inlet pipe is installed at the input end of the hydraulic oil pump, a mounting hole is opened on the top of the oil tank, and the lower end of the oil inlet pipe passes through the mounting hole and is located inside the oil tank;

[0006] A filter box is installed on the top of the test bench, the lower end of the oil outlet pipe is connected to one end of the filter box, two through holes are provided on the side where the filter box and the test bench are attached, a filter screen 1 is embedded in each of the two through holes, a filter screen 2 is placed at the bottom of the filter box, and an anti-backflow component is connected between the filter box and the oil tank;

[0007] The telescopic tube is composed of an outer tube, an inner tube and a buffer spring. A sealing ring 1 is installed at one end of the outer tube that is close to each other. The inner side of the sealing ring 1 is slidably connected to the outer side of the inner tube. One end of the inner tube is connected to a mounting cover. A sealing ring 2 is installed at the other end of the inner tube. The outer side of the sealing ring 2 is slidably connected to the inner side of the outer tube. The end of the sealing ring 1 that is away from the outer tube is elastically connected to one end of the mounting cover through a buffer spring.

[0008] Furthermore, the placement assembly includes a fixed block, a compression spring and a base, the fixed block is installed at the middle end of the top of the test bench, the top of the fixed block is provided with a sliding groove that is slidably connected to the base, a compression spring is elastically connected between the bottom of the base and the sliding groove, and the top of the base is provided with a groove that fits with the hydraulic valve.

[0009] Furthermore, fixing plates are installed at both ends of the top of the test bench, and fixing holes connected to the outer tube are opened at the upper ends of the fixing plates.

[0010] Furthermore, a mounting groove is provided at one end of the mounting cover that is close to each other, an airbag is connected to the inside of the mounting groove, the inner side of the airbag is in compression contact with the outer side of the hydraulic valve, and an air pump connected to the airbag is installed on the top of the mounting cover.

[0011] Furthermore, the anti-backflow assembly includes a connecting pipe, a support plate, a limit spring, a sealing cover, a fixing tube and a fixing ring. The top of the connecting pipe is connected to the bottom of the filter box, and the bottom of the connecting pipe is connected to the top of the oil tank.

[0012] Furthermore, connecting blocks are installed on both sides of the support plate, and the connecting blocks are connected to the lower end of the connecting tube. The top of the support plate is elastically connected to a sealing cover through a limiting spring. A fixing ring is installed at the upper end of the connecting tube, and a fixing cylinder is installed at the bottom of the fixing ring. The top of the sealing cover is provided with a guide groove slidably connected to the fixing cylinder, and the outer array of the fixing cylinder is provided with limiting holes.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: a filter box and a filter screen are added, and the leaked oil and the oil inside the hydraulic valve are filtered through the filter screen and then recovered into the filter box, and enter the oil tank through the connecting pipe for recycling. Compared with the method of only recovering the oil after the hydraulic valve is tested, it can also avoid timely recovery and treatment of the leaked oil on the test bench when encountering unqualified hydraulic valves, thereby reducing the testing cost. Telescopic tubes and mounting covers are added. When encountering hydraulic valves of different sizes, the telescopic tubes can be telescoped and adjusted in length to achieve clamping and fixation of hydraulic valves of different sizes. Compared with the motor-driven method, it is simpler and more convenient, reduces the time for disassembling the hydraulic valve, and improves the testing efficiency of the hydraulic valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a cross-sectional view of the internal structure of the test bench of the utility model;

[0016] Figure 3 This is a cross-sectional view of the internal structure of the telescopic tube and the mounting cover of the utility model;

[0017] Figure 4 For the utility model Figure 2 A magnified view of the structure at center;

[0018] Figure 5 It is a cross-sectional view of the placement component of the utility model.

[0019] In the figure:

[0020] 1. Test bench; 2. Placement components; 201. Fixed block; 202. Compression spring; 203. Base; 3. Hydraulic valve; 4. Fixed plate; 5. Telescopic tube; 501. Outer tube; 502. Sealing ring 1; 503. Inner tube; 504. Sealing ring 2; 505. Buffer spring; 6. Mounting cover; 7. Hydraulic oil pump; 8. Oil outlet pipe; 9. Hydraulic gauge; 10. Oil inlet pipe; 11. Oil tank; 12. Filter 1; 13. Filter box; 14. Filter 2; 15. Air pump; 16. Air bag; 17. Connecting pipe; 18. Support plate; 19. Limit spring; 20. Sealing cover; 21. Fixed cylinder; 22. Fixed ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 The utility model provides the following technical solutions: a hydraulic valve testing device, including a test bench 1, a placement component 2, a hydraulic oil pump 7, an oil tank 11 and a filter box 13. A hydraulic valve 3 is placed at the middle end of the top of the test bench 1 through the placement component 2. The placement component 2 includes a fixed block 201, a compression spring 202 and a base 203. The fixed block 201 is installed at the middle end of the top of the test bench 1. A slide groove slidably connected to the base 203 is opened on the top of the fixed block 201. The slide groove limits the base 203 to slide up and down. A compression spring 202 is elastically connected between the bottom of the base 203 and the slide groove. A groove is provided on the top of the base 203 to fit the hydraulic valve 3. The groove increases the contact area between the base 203 and the hydraulic valve 3. The compression spring 202 plays the role of limiting the base 203, so that the base 203 is always in contact with the hydraulic valve 3. When the hydraulic valve 3 is removed, the compression spring 202 plays a buffering role, thereby avoiding collision of the hydraulic valve 3.

[0023] A hydraulic oil pump 7 is installed at one end of the top of the test bench 1, and an oil outlet pipe 8 is installed at the other end of the top of the test bench 1. The output end of the hydraulic oil pump 7 and the upper end of the oil outlet pipe 8 are both connected with a telescopic tube 5. The output end of the hydraulic oil pump 7 and the upper end of the oil outlet pipe 8 are also installed with a hydraulic gauge 9. One end of the two telescopic tubes 5 are connected with a mounting cover 6. The ends of the mounting covers 6 close to each other are provided with a mounting groove, and the other end of the mounting cover 6 is provided with a channel connected to the inner tube 503. The inside of the mounting groove is connected with an air bag 16, and the inner side of the air bag 16 is in compression contact with the outer side of the hydraulic valve 3. The top of the mounting cover 6 is equipped with an air pump 15 connected to the air bag 16. The air pump 15 and the air bag 16 are connected by an air valve, and inflation and deflation are controlled by the air valve. The air bag 16 is inflated by the air pump 15, and the air bag 16 expands to seal the gap between the mounting groove and the hydraulic valve 3, thereby realizing sealing and fixing of hydraulic valves 3 of different sizes.

[0024] An oil tank 11 is installed at the bottom of the test bench 1, and an oil filling pipe is installed on one side of the oil tank 11. The oil filling pipe extends out of the test bench 1. Oil is added to the oil tank 11 through the oil filling pipe. An oil inlet pipe 10 is installed at the input end of the hydraulic oil pump 7. A mounting hole is opened on the top of the oil tank 11. The lower end of the oil inlet pipe 10 passes through the mounting hole and is located inside the oil tank 11. A filter box 13 is installed on the top of the test bench 1. The lower end of the oil outlet pipe 8 is connected to one end of the filter box 13. The filter box 13 and the test bench 1 are fitted together. There are two through holes on the surface, and filter screen 12 is embedded in both through holes. Filter screen 12 is located at the bottom of telescopic tube 5 and hydraulic valve 3. When oil leaks during testing, it is directly filtered through the mesh of filter screen 12 and enters filter box 13. Filter screen 2 14 is placed at the bottom of filter box 13. Filter screen 2 14 is located at the lower end of oil outlet pipe 8. The tested oil in oil outlet pipe 8 enters filter box 13, and the oil in filter box 13 is filtered through the mesh of filter screen 2 14 and enters connecting pipe 17.

[0025] An anti-backflow assembly is connected between the filter box 13 and the oil tank 11, and the anti-backflow assembly includes a connecting pipe 17, a support plate 18, a limit spring 19, a sealing cover 20, a fixing cylinder 21 and a fixing ring 22. The top of the connecting pipe 17 is connected to the bottom of the filter box 13, and the bottom of the connecting pipe 17 is connected to the top of the oil tank 11. Connecting blocks are installed on both sides of the support plate 18, and the connecting blocks are connected to the lower end of the inner part of the connecting pipe 17. There is a gap between the support plate 18 and the connecting pipe 17 for oil to pass through. The top of the support plate 18 is elastically connected to the sealing cover 21 through the limit spring 19. 0, the sealing cover 20 is always fitted with the bottom of the fixing ring 22 by the limiting spring 19, the fixing ring 22 is installed at the upper end of the connecting tube 17, the fixing cylinder 21 is installed at the bottom of the fixing ring 22, the fixing ring 22 is communicated with the inner wall of the fixing cylinder 21, the top of the sealing cover 20 is provided with a guide groove slidably connected with the fixing cylinder 21, and the outer array of the fixing cylinder 21 is provided with limiting holes. When the top of the sealing cover 20 is fitted with the bottom of the fixing ring 22, the limiting holes are in a sealed state. When the sealing cover 20 slides downward under the oil pressure, the limiting holes are opened and the oil passes through the limiting holes.

[0026] The telescopic tube 5 is composed of an outer tube 501, an inner tube 503 and a buffer spring 505. Both ends of the top of the test bench 1 are equipped with fixing plates 4. The upper end of the fixing plate 4 is provided with a fixing hole connected to the outer tube 501. The fixing plate 4 supports the outer tube 501. The end of the outer tube 501 close to each other is equipped with a sealing ring 1 502. The inner side of the sealing ring 1 502 is slidably connected to the outer side of the inner tube 503. One end of the inner tube 503 is connected to the mounting cover 6. The other end of the inner tube 503 is equipped with a sealing ring 2 504. The outer side of the sealing ring 2 504 is slidably connected to the inner side of the outer tube 501. The sealing between the inner tube 503 and the outer tube 501 is increased by the sealing ring 1 502 and the sealing ring 2 504. At the same time, the sliding distance of the inner tube 503 inside the outer tube 501 is limited. The end of the sealing ring 1 502 away from the outer tube 501 is elastically connected to one end of the mounting cover 6 through the buffer spring 505. The buffer spring 505 plays the role of limiting the mounting cover 6.

[0027] Working principle: before use, fill the oil tank 11 with oil through the oil filling pipe on one side of the test bench 1. When in use, slide the mounting cover 6 toward the end away from each other. The mounting cover 6 drives the inner tube 503 and the sealing ring 2 504 to slide and squeeze the buffer spring 505. Then place the hydraulic valve 3 on the top of the base 203. The base 203 is subjected to pressure to squeeze the compression spring 202. Then release the mounting cover 6. The thrust of the buffer spring 505 drives the mounting cover 6 to slide toward the hydraulic valve 3 and move the hydraulic valve 3 up and down. The base 203 is limited by the compression spring 202 and always fits with the hydraulic valve 3. Insert the two ends of the hydraulic valve 3 into the inner side of the airbag 16. Then start the air pump 15. The air pump 15 inflates the inside of the airbag 16. The expanded outer side of the airbag 16 fits with the mounting groove of the mounting cover 6, and the inner side fits with the two ends of the hydraulic valve 3, thereby achieving the sealing between the mounting cover 6 and the hydraulic valve 3. Start the hydraulic oil pump 7, and the oil in the oil tank 11 passes through the oil inlet pipe 10 , the outer tube 501, the inner tube 503 and the channel of the mounting cover 6 at one end enter the hydraulic valve 3, the hydraulic valve 3 is closed, the air pressure is observed through the hydraulic gauge 9, and whether there is oil leakage, after the test is completed, the hydraulic valve 3 is opened, and the oil in the hydraulic valve 3 enters the filter box 13 through the outer tube 501, the inner tube 503, the channel of the mounting cover 6 and the oil outlet pipe 8 at the other end, the leaked oil on the test bench 1 is filtered through the filter screen 12 and enters the filter box 13, the oil in the filter box 13 is filtered through the filter screen 2 14 and enters the connecting pipe 17, the oil in the connecting pipe 17 passes through the limiting holes of the fixing ring 22 and the fixing cylinder 21, and stays in the guide groove at the top of the sealing cover 20, at this time, the sealing cover 20 slides downward under the gravity of the oil and squeezes the limiting spring 19, when the sealing cover 20 slides, the limiting hole of the fixing cylinder 21 opens, and the oil flows from the connecting pipe 17 into the oil tank 11 through the limiting hole, thereby completing the recovery of the oil.

[0028] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0029] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A hydraulic valve testing device, comprising a test bench (1), a placement assembly (2), a hydraulic oil pump (7), an oil tank (11) and a filter box (13), characterized in that: A hydraulic valve (3) is placed at the middle end of the top of the test bench (1) via a placement assembly (2); a hydraulic oil pump (7) is installed at one end of the top of the test bench (1); an oil outlet pipe (8) is installed at the other end of the top of the test bench (1); the output end of the hydraulic oil pump (7) and the upper end of the oil outlet pipe (8) are both connected to a telescopic tube (5); the output end of the hydraulic oil pump (7) and the upper end of the oil outlet pipe (8) are also installed with a hydraulic gauge (9); one end of the two telescopic tubes (5) are both connected to a mounting cover (6); an oil tank (11) is installed at the bottom of the interior of the test bench (1); an oil inlet pipe (10) is installed at the input end of the hydraulic oil pump (7); a mounting hole is opened at the top of the oil tank (11); the lower end of the oil inlet pipe (10) passes through the mounting hole and is located inside the oil tank (11); A filter box (13) is installed at the top of the test bench (1), the lower end of the oil outlet pipe (8) is connected to one end of the filter box (13), two through holes are provided on the side where the filter box (13) and the test bench (1) are in contact, a filter screen 1 (12) is embedded in each of the two through holes, a filter screen 2 (14) is placed at the bottom of the filter box (13), and an anti-backflow component is connected between the filter box (13) and the oil tank (11); The telescopic tube (5) is composed of an outer tube (501), an inner tube (503) and a buffer spring (505); a sealing ring 1 (502) is installed at one end of the outer tube (501) that is close to each other, and the inner side of the sealing ring 1 (502) is slidably connected to the outer side of the inner tube (503); one end of the inner tube (503) is connected to a mounting cover (6); a sealing ring 2 (504) is installed at the other end of the inner tube (503); the outer side of the sealing ring 2 (504) is slidably connected to the inner side of the outer tube (501); and the end of the sealing ring 1 (502) that is away from the outer tube (501) is elastically connected to one end of the mounting cover (6) via a buffer spring (505).

2. A hydraulic valve testing device according to claim 1, characterized in that: The placement assembly (2) comprises a fixed block (201), a compression spring (202) and a base (203); the fixed block (201) is mounted at the middle end of the top of the test bench (1); a slide groove slidably connected to the base (203) is provided on the top of the fixed block (201); a compression spring (202) is elastically connected between the bottom of the base (203) and the slide groove; and a groove is provided on the top of the base (203) to fit the hydraulic valve (3).

3. A hydraulic valve testing device according to claim 1, characterized in that: Both ends of the top of the test bench (1) are provided with fixing plates (4), and the upper end of the fixing plate (4) is provided with a fixing hole connected to the outer tube (501).

4. A hydraulic valve testing device according to claim 1, characterized in that: The mounting cover (6) has a mounting groove at one end close to each other, the interior of the mounting groove is connected to an air bag (16), the inner side of the air bag (16) is in compression contact with the outer side of the hydraulic valve (3), and the top of the mounting cover (6) is equipped with an air pump (15) connected to the air bag (16).

5. A hydraulic valve testing device according to claim 1, characterized in that: The anti-backflow assembly comprises a connecting pipe (17), a supporting plate (18), a limiting spring (19), a sealing cover (20), a fixing cylinder (21) and a fixing ring (22); the top of the connecting pipe (17) is connected to the bottom of the filter box (13), and the bottom of the connecting pipe (17) is connected to the top of the oil tank (11).

6. A hydraulic valve testing device according to claim 5, characterized in that: Connecting blocks are installed on both sides of the support plate (18), and the connecting blocks are connected to the lower end of the inside of the connecting tube (17). The top of the support plate (18) is elastically connected to a sealing cover (20) via a limit spring (19). A fixing ring (22) is installed at the upper end of the inside of the connecting tube (17). A fixing cylinder (21) is installed at the bottom of the fixing ring (22). A guide groove slidably connected to the fixing cylinder (21) is provided at the top of the sealing cover (20), and a limiting hole array is provided on the outer side of the fixing cylinder (21).

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