Fatigue testing device for hydraulic valve

Abstract

The utility model discloses a fatigue testing device for a hydraulic valve, which belongs to the technical field of fatigue testing of the hydraulic valve, aims at solving the problems that the hydraulic valve in the prior art is unstable in the detection process and influences the testing accuracy, and comprises a testing workbench and a placing seat fixed in the middle of the top surface of the testing workbench; through the arrangement of the threaded rod, the clamping block, the movable rod and other structures, the hydraulic valve is clamped and limited, the stability of the hydraulic valve when the hydraulic valve is placed on the test workbench is improved, through the cooperation of the movable rod and the movable clamping mechanism, the movable plate drives the insertion pipe to clamp the liquid inlet and outlet end of the hydraulic valve, and the working efficiency is improved. According to the hydraulic valve fatigue testing device, the connecting end can be limited, the stability in the hydraulic valve fatigue testing process is improved, the gear is limited through the arrangement of the limiting mechanism, the overall stability of the device is further improved, and then the testing accuracy is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic valve fatigue testing, and in particular relates to a hydraulic valve fatigue testing device. Background Art

[0002] A hydraulic valve is a device used to control the flow direction of oil in a hydraulic system, adjust the pressure of the oil, or adjust the flow rate of the oil. Its valve body continuously moves back and forth under the action of the spring and oil pressure, so the fatigue life of the hydraulic valve is very important.

[0003] In the prior art, during fatigue testing, the hydraulic valve to be tested is placed on a test bench and connected between a liquid inlet line and a liquid return line, and a preset flow of liquid is supplied to the valve to be tested at a preset frequency. This method uses flow pulses to test the valve to be tested, which can simulate the actual working environment of the hydraulic valve, thereby performing a fatigue test on the hydraulic valve. However, the hydraulic valve needs to be kept level and stable during the test. If the test bench is not placed flat or the hydraulic valve is hit during the test, leakage may occur at the connection end between the test device and the hydraulic valve, thereby affecting the accuracy of the test.

[0004] Therefore, a hydraulic valve fatigue testing device is needed to solve the problem in the prior art that the hydraulic valve is unstable during the testing process, which affects the test accuracy. Utility Model Content

[0005] The utility model aims to provide a hydraulic valve fatigue testing device to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical solutions: a hydraulic valve fatigue test device, including a test workbench, and also including:

[0007] A placement seat, the placement seat is fixed in the middle of the top surface of the test workbench, and rectangular grooves are opened on both sides of the top surface of the test workbench. A limit rod is fixed on the inner wall of the rectangular groove, and a movable plate is slidably sleeved on the outer surface of the limit rod, and a plug is inserted into the surface of the movable plate;

[0008] There are two movable grooves, which are symmetrically distributed and opened on the top surface of the test workbench. A threaded rod is threaded through the two movable grooves corresponding to one side of the test workbench. The inner walls of the two movable grooves are slidably connected with movable rods. The threaded rods thread through the two movable rods. A U-shaped connecting rod is fixed at one end of the two movable rods close to each other. Clamping blocks are fixed at both ends of the U-shaped connecting rod. A movable clamping mechanism is arranged between one of the movable rods and the two movable plates. A limiting mechanism cooperating with the movable clamping mechanism is arranged on the top surface of the test workbench.

[0009] It should be noted that the mobile clamping mechanism includes:

[0010] A first L-shaped rack plate, two first L-shaped rack plates are provided and are respectively fixed to the surfaces of the two movable plates, two second L-shaped rack plates are fixed to one side of one of the movable rods, two symmetrically distributed fixed shafts are fixed to the top surface of the test workbench, gears are rotatably installed at the ends of the fixed shafts, the first L-shaped rack plate is meshed with the gear for transmission, and the second L-shaped rack plate is meshed with the gear for transmission;

[0011] The limiting plates are provided with two and are respectively fixed on the surfaces of the two first L-shaped rack plates. Four fixing blocks are fixed on the side of the test workbench. A support rod is fixed between two of the fixing blocks, and the support rod movably passes through the limiting plates.

[0012] It is further worth noting that the limiting mechanism includes:

[0013] A fixing plate, wherein two fixing plates are provided and symmetrically distributed and fixed on the top surface of the test workbench, a first moving rod and a second moving rod are inserted into one side of the fixing plate, a latching tooth matched with a gear is fixed on one end of the first moving rod, a spring is sleeved on the outer surface of the first moving rod, one end of the spring is fixed to the surface of the latching tooth, and the other end of the spring is fixed to the surface of the fixing plate;

[0014] A connecting block is fixed to the other end of the first moving rod, one end of the second moving rod is fixed to the surface of the connecting block, and a pull rod is fixed to the other ends of the two second moving rods.

[0015] It should be further explained that arc-shaped clamping plates are fixed on the sides of the two U-shaped connecting rods close to each other, and a placement groove is provided on the top surface of the placement seat.

[0016] As a preferred embodiment, a mounting plate is fixedly sleeved on the outer surface of the insert tube, and a sealing ring is fixedly mounted on the surface of the mounting plate.

[0017] As a preferred implementation, a rotating rod is fixed to the end of the threaded rod.

[0018] Compared with the prior art, the hydraulic valve fatigue testing device provided by the utility model has at least the following beneficial effects:

[0019] (1) Through the arrangement of structures such as threaded rods, clamping blocks and movable rods, the effect of clamping and limiting the hydraulic valve is achieved, thereby improving the stability of the hydraulic valve when placed on the test workbench. Through the cooperation between the movable rod and the mobile clamping mechanism, the movable plate drives the insert to clamp the inlet and outlet ends of the hydraulic valve, and can also play a role in limiting the connection end, thereby improving the stability of the hydraulic valve during fatigue testing. Through the arrangement of the limiting mechanism, the gear is limited, thereby further improving the overall stability of the device and thus improving the accuracy of the test.

[0020] (2) When the clamping block clamps the liquid inlet and outlet pipes of the hydraulic valve, the arc-shaped clamping plate clamps the surface of the hydraulic valve, thereby further improving the stability of the hydraulic valve during the detection process, thereby improving the stability of fatigue detection. The placement groove facilitates the placement of the hydraulic valve to be detected, thereby improving the stability of the hydraulic valve during placement. The sealing ring fits with the surface of the inlet and outlet ends, thereby improving the sealing during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 This is a schematic diagram of the overall structure of the test workbench of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the limiting mechanism of the utility model.

[0025] In the figure: 1. test workbench; 2. placement seat; 3. U-shaped connecting rod; 4. movable rod; 5. arc-shaped clamping plate; 6. clamping block; 7. movable plate; 8. rectangular groove; 9. limiting rod; 10. first L-shaped rack plate; 11. gear; 12. threaded rod; 13. rotating rod; 14. movable groove; 15. insert tube; 16. mounting plate; 17. sealing ring; 18. second L-shaped rack plate; 19. fixed plate; 20. connecting block; 21. first moving rod; 22. spring; 23. latching tooth; 24. pull rod; 25. limiting plate; 26. support rod; 27. fixed block; 28. second moving rod; 29. ​​fixed shaft; 30. placement groove. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-4 The utility model provides a hydraulic valve fatigue testing device, comprising a testing workbench 1, and also comprising:

[0028] A placement seat 2 is fixed in the middle of the top surface of the test workbench 1. A rectangular groove 8 is provided on both sides of the top surface of the test workbench 1. A limit rod 9 is fixed on the inner wall of the rectangular groove 8. A movable plate 7 is slidably sleeved on the outer surface of the limit rod 9. A plug 15 is inserted into the surface of the movable plate 7.

[0029] There are two movable grooves 14, which are symmetrically distributed and opened on the top surface of the test workbench 1. One side of the test workbench 1 corresponds to the two movable grooves 14, and a threaded rod 12 is threaded through them. The inner walls of the two movable grooves 14 are slidably connected with movable rods 4. The threaded rod 12 threads through the two movable rods 4. A U-shaped connecting rod 3 is fixed at one end of the two movable rods 4 that are close to each other. Clamping blocks 6 are fixed at both ends of the U-shaped connecting rod 3. A mobile clamping mechanism is arranged between one of the movable rods 4 and the two movable plates 7. A limiting mechanism cooperating with the mobile clamping mechanism is arranged on the top surface of the test workbench 1.

[0030] It is worth noting that: the surface of the threaded rod 12 is provided with two sections of threads with opposite thread directions corresponding to the two movable grooves 14, and the two movable rods 4 are respectively located on the two sections of threads, so that when the threaded rod 12 is rotated, the two movable rods 4 can be driven to move closer to or away from each other.

[0031] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the mobile clamping mechanism includes:

[0032] A first L-shaped rack plate 10, two first L-shaped rack plates 10 are provided and are respectively fixed to the surfaces of the two movable plates 7, two second L-shaped rack plates 18 are fixed to one side of one movable rod 4, two symmetrically distributed fixed shafts 29 are fixed to the top surface of the test workbench 1, and the ends of the fixed shafts 29 are rotatably mounted with gears 11, the first L-shaped rack plate 10 is meshed with the gear 11 for transmission, and the second L-shaped rack plate 18 is meshed with the gear 11 for transmission;

[0033] The limiting plates 25 are provided with two and are respectively fixed to the surfaces of the two first L-shaped rack plates 10 . Four fixing blocks 27 are fixed to the side of the test workbench 1 . A support rod 26 is fixed between the two fixing blocks 27 . The support rod 26 movably passes through the limiting plates 25 .

[0034] It is worth mentioning that when the first L-shaped rack plate 10 moves horizontally, it drives the limit plate 25 to slide on the support rod 26, thereby limiting the first L-shaped rack plate 10 and improving the stability of the movement of the first L-shaped rack plate 10; wherein the first L-shaped rack plate 10 is located at the upper end of the second L-shaped rack plate 18.

[0035] Further as Figure 2 and Figure 4 As shown, it is worth mentioning that the limiting mechanism includes:

[0036] A fixing plate 19, two fixing plates 19 are provided and symmetrically distributed and fixed on the top surface of the test workbench 1, a first moving rod 21 and a second moving rod 28 are inserted into one side of the fixing plate 19, one end of the first moving rod 21 is fixed with a latching tooth 23 matching with the gear 11, the outer surface of the first moving rod 21 is sleeved with a spring 22, one end of the spring 22 is fixed to the surface of the latching tooth 23, and the other end of the spring 22 is fixed to the surface of the fixing plate 19;

[0037] The connecting block 20 is fixed to the other end of the first moving rod 21 , one end of the second moving rod 28 is fixed to the surface of the connecting block 20 , and the other ends of the two second moving rods 28 are fixed with a pull rod 24 .

[0038] It is worth noting that the pull rod 24 facilitates the movement of the latching teeth 23 .

[0039] Further as Figure 3 As shown, it is worth explaining in detail that an arc-shaped clamping plate 5 is fixed on one side of the two U-shaped connecting rods 3 that are close to each other. When the clamping block 6 clamps the liquid inlet pipe and the liquid outlet pipe of the hydraulic valve, the arc-shaped clamping plate 5 clamps the surface of the hydraulic valve, which further improves the stability of the hydraulic valve during the detection process, thereby improving the stability of fatigue detection; a placement groove 30 is provided on the top surface of the placement seat 2, and the placement groove 30 facilitates the placement of the hydraulic valve to be detected and improves the stability of the hydraulic valve during placement.

[0040] Further as Figure 1 and Figure 3As shown, it is worth explaining in detail that a mounting plate 16 is fixedly sleeved on the outer surface of the cannula 15, and a sealing ring 17 is fixedly mounted on the surface of the mounting plate 16. The mounting plate 16 moves together with the cannula 15. When the cannula 15 is inserted into the inlet and outlet ends of the hydraulic valve, the mounting plate 16 fits with the inlet and outlet ends of the hydraulic valve. At this time, the sealing ring 17 fits with the surface of the inlet and outlet ends, thereby improving the sealing performance during the detection process; a rotating rod 13 is fixed to the end of the threaded rod 12, and the rotating rod 13 facilitates the rotation of the threaded rod 12.

[0041] This solution has the following working process: during the test, the hydraulic valve needs to be kept level and stable. If the position of the test bench is uneven or the hydraulic valve is hit during the test, it may cause leakage at the connection end between the test device and the hydraulic valve, thereby affecting the accuracy of the test. The hydraulic valve to be tested is placed in the placement groove 30 of the placement seat 2, and then the rotating rod 13 is rotated to drive the threaded rod 12 to rotate, thereby driving the two movable rods 4 to approach each other, and then the clamping blocks 6 are pushed to approach each other through the U-shaped connecting rod 3 and clamp the liquid inlet and outlet pipes of the hydraulic valve, thereby maintaining the stability of the hydraulic valve during the test. When one of the movable rods 4 moves, it drives the two The two L-shaped rack plates 18 move horizontally, so that the second L-shaped rack plate 18 drives the gear 11 to rotate, and then drives the two first L-shaped rack plates 10 to move horizontally close to each other through the gear 11, so that the first L-shaped rack plate 10 drives the movable plate 7 to move toward the direction of the hydraulic valve, wherein the movable plate 7 is limited by the limiting rod 9 and the rectangular groove 8, and the movable plate 7 drives the insert tube 15 to insert into the inlet and outlet of the hydraulic valve, wherein the sealing ring 17 is used to improve the sealing between the mounting plate 16 and the hydraulic valve, and after docking, the latch 23 is pushed to be stuck on the gear 11 under the elastic force of the spring 22, thereby limiting the gear 11, thereby maintaining the stability of the overall device after docking.

[0042] According to the above working process, it can be known that: through the setting of structures such as the threaded rod 12, the clamping block 6 and the movable rod 4, the effect of clamping and limiting the hydraulic valve is achieved, and the stability of the hydraulic valve when placed on the test workbench 1 is improved. Through the cooperation between the movable rod 4 and the mobile clamping mechanism, the movable plate 7 drives the insert tube 15 to clamp the inlet and outlet ends of the hydraulic valve, and can play the effect of limiting the connecting end, thereby improving the stability of the hydraulic valve during fatigue testing. Through the setting of the limiting mechanism, the gear 11 is limited, thereby further improving the overall stability of the device, and then improving the accuracy of the test.

[0043] 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.

[0044] 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 fatigue testing device, comprising a testing workbench (1), characterized in that: Also includes: A placement seat (2), the placement seat (2) is fixed in the middle of the top surface of the test workbench (1), rectangular grooves (8) are provided on both sides of the top surface of the test workbench (1), a limit rod (9) is fixed to the inner wall of the rectangular groove (8), a movable plate (7) is slidably sleeved on the outer surface of the limit rod (9), and a plug (15) is inserted into the surface of the movable plate (7); The invention discloses a movable groove (14), wherein two movable grooves (14) are provided and symmetrically distributed on the top surface of the test workbench (1); a threaded rod (12) is threadedly penetrated through the two movable grooves (14) corresponding to one side of the test workbench (1); the inner walls of the two movable grooves (14) are slidably connected with movable rods (4); the threaded rod (12) is threadedly penetrated through the two movable rods (4); a U-shaped connecting rod (3) is fixed at one end of the two movable rods (4) close to each other; clamping blocks (6) are fixed at both ends of the U-shaped connecting rod (3); a movable clamping mechanism is provided between one of the movable rods (4) and the two movable plates (7); and a limiting mechanism matched with the movable clamping mechanism is provided on the top surface of the test workbench (1).

2. A hydraulic valve fatigue testing device according to claim 1, characterized in that: The mobile clamping mechanism comprises: A first L-shaped rack plate (10), wherein two first L-shaped rack plates (10) are provided and are respectively fixed to the surfaces of two movable plates (7), two second L-shaped rack plates (18) are fixed to one side of one of the movable rods (4), two symmetrically distributed fixed shafts (29) are fixed to the top surface of the test workbench (1), and gears (11) are rotatably mounted on the ends of the fixed shafts (29), the first L-shaped rack plate (10) is meshed with the gear (11) for transmission, and the second L-shaped rack plate (18) is meshed with the gear (11) for transmission; The limiting plates (25) are provided with two and are respectively fixed to the surfaces of the two first L-shaped rack plates (10); four fixing blocks (27) are fixed to the side of the test workbench (1); a support rod (26) is fixed between two of the fixing blocks (27); and the support rod (26) movably passes through the limiting plates (25).

3. A hydraulic valve fatigue testing device according to claim 2, characterized in that: The limiting mechanism comprises: A fixed plate (19), wherein two fixed plates (19) are provided and symmetrically distributed and fixed on the top surface of the test workbench (1), a first moving rod (21) and a second moving rod (28) are inserted on one side of the fixed plate (19), one end of the first moving rod (21) is fixed with a latching tooth (23) matching with the gear (11), the outer surface of the first moving rod (21) is sleeved with a spring (22), one end of the spring (22) is fixed to the surface of the latching tooth (23), and the other end of the spring (22) is fixed to the surface of the fixed plate (19); A connecting block (20) is fixed to the other end of the first moving rod (21), one end of the second moving rod (28) is fixed to the surface of the connecting block (20), and the other ends of the two second moving rods (28) are fixed with pull rods (24).

4. A hydraulic valve fatigue testing device according to claim 1, characterized in that: An arc-shaped clamping plate (5) is fixed on the side where the two U-shaped connecting rods (3) are close to each other, and a placement groove (30) is provided on the top surface of the placement seat (2).

5. A hydraulic valve fatigue testing device according to claim 1, characterized in that: The outer surface of the insert tube (15) is fixedly sleeved with a mounting plate (16), and a sealing ring (17) is fixedly mounted on the surface of the mounting plate (16).

6. A hydraulic valve fatigue testing device according to claim 1, characterized in that: A rotating rod (13) is fixed to the end of the threaded rod (12).

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