Hydraulic valve testing device

Abstract

The utility model discloses a hydraulic valve testing device which comprises a shell, an installation box fixedly penetrates through the upper portion of the shell, two sets of lifting boxes are arranged in the installation box, an air storage box is installed on the upper portion of the installation box, an air pump is installed on the upper portion of the air storage box, and the output end of the air pump is connected with an air guide pipe in a clamped mode. An air guiding hose penetrates through the side wall of the air storage box, a sleeving box fixedly sleeves the side wall of one end of the air guiding hose, upper exhaust pipes fixedly penetrate through the lower parts of the two lifting boxes, and the lower ends of the two upper exhaust pipes slidably penetrate through the inner bottom surface of the mounting box; and the side walls of the two groups of upper exhaust pipes are fixedly sleeved with upper pressing plates. The hydraulic valve testing device has the beneficial effects that the mounting box and the lifting box are adopted, so that the test efficiency can be prevented from being influenced by the disassembly and assembly of the hydraulic valve, and the working efficiency of the hydraulic valve testing device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic valve test technical field, concretely relates to a hydraulic valve testing arrangement. BACKGROUND

[0002] Hydraulic valve is a kind of device for controlling the pressure, flow and direction of oil in hydraulic system, is the important component of hydraulic system, is widely used in various hydraulic equipment, such as engineering machinery, machine tool, metallurgical equipment, aerospace field, the hydraulic valve of production completion needs to use testing arrangement, completes the air tightness detection of hydraulic valve, practical use has simple operation, stable structure and test precision and so on Advantages.

[0003] Prior art discloses the application number for: CN202322623474.9 a hydraulic valve test board, the utility model, hydraulic valve needs to be clamped, can only carry out air tightness test, when testing is finished, it needs to be disassembled and can be installed and tested to the next hydraulic valve, this operation needs a certain time, and further reduces the working efficiency of the utility model, simultaneously, hydraulic valve has no cleaning structure, when the impurities of adsorption exist on the surface of hydraulic valve, impurities can press the clamping structure or the surface of hydraulic valve, and this utility model brings hidden trouble for the continuous use.

[0004] For the problems in the related art, no effective solution has been proposed so far. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a hydraulic valve testing arrangement, has the advantages that the disassembly and assembly of hydraulic valve can be avoided to affect the test efficiency, has cleaning structure, and the impurities adsorbed on the surface of hydraulic valve can be cleaned in advance, thereby solving the problems in the background art.

[0006] To realize the above-mentioned advantages that the disassembly and assembly of hydraulic valve can be avoided to affect the test efficiency, have cleaning structure, and the impurities adsorbed on the surface of hydraulic valve can be cleaned in advance, the utility model adopts the following specific technical solutions:

[0007] The utility model provides a hydraulic valve testing device, including the upper portion of the shell, the installation box is fixed through in the upper portion of shell, and the inside of installation box is provided with two groups of lifting box, the upper portion of installation box is installed with the gas storage tank, and the upper portion of gas storage tank is installed with the gas pump, and the output of gas pump is jointed with the gas guide pipe, and one end of gas guide pipe inserts the inside of gas storage tank, the sidewall of gas storage tank is through with the gas guide hose, and the sidewall of one end of gas guide hose is fixed with sleeve box, the lower portion of two groups of lifting box is fixed through with the upper exhaust pipe, and the lower end of two groups of upper exhaust pipe is slid through the inside bottom surface of installation box, the sidewall of two groups of upper exhaust pipe is fixed with the upper pressing plate, the inside bottom surface of shell is fixed through with two groups of lower exhaust pipe, and the sidewall of two groups of lower exhaust pipe is fixed with the lower pressing plate, the inside bottom surface of shell is installed with four groups of mounting plate, and the same side two groups of mounting plate are installed with the two -way screw lever through bearing, the sidewall of two groups of two -way screw lever is sleeved with two groups of screw sleeve, the sidewall of four groups of screw sleeve is fixed with sleeve plate, and the opposite face of same side two groups of sleeve plate is fixedly installed with the clamping plate, the sidewall of two groups of mounting plate on both sides is installed with the first self -locking positive and negative rotation motor, the end surface of installation box is installed with the second self -locking positive and negative rotation motor, and the output of second self -locking positive and negative rotation motor is fixed with the gear, and the opposite face of two groups of lifting box is fixedly installed with the sawtooth plate.

[0008] Further, the sidewall of one end of the gas guide hose is provided with a second control valve, the inside of the sleeve box is provided with two guide rods, the sidewall of the two guide rods is slidably sleeved with a sleeve hole plate, the sidewall of the two guide rods is sleeved with a spring, the sidewall of the sleeve box is slidably penetrated with four connecting rods, the inner end of the four connecting rods is fixedly connected with the sleeve hole plate, the outer end of the two connecting rods on the same side is provided with a connecting plate, one side of the two connecting plates is provided with a magnet plate, the other side of the two connecting plates is provided with a sponge plate, the upper side of the gas guide hose is provided with a mounting screw, and the sidewall of the mounting screw is sleeved with two mounting nuts and two moving hole plates.

[0009] Further, the mounting screw and the two mounting nuts are threadedly engaged with each other.

[0010] Further, the two connecting hoses are penetrated between the two lifting boxes and the gas storage tank, and the sidewall of the two connecting hoses is provided with a first control valve.

[0011] Further, the gear is engaged with the two sawtooth plates.

[0012] Further, the lower part of the shell is provided with two groups of mounting covers, and the end faces of the two groups of mounting covers are fixedly penetrated through pressure sensors, one side of the shell is provided with an electric control box, the inside of the electric control box is provided with a controller and an alarm, and the controller is electrically connected with the alarm, the air pump, the two groups of pressure sensors, the two groups of first self-locking reversible motors and the second self-locking reversible motor through wires.

[0013] Further, the output ends of the two groups of first self-locking reversible motors are connected with the two groups of bidirectional lead screws through couplings.

[0014] Further, two groups of cross bars are slidably penetrated between the two groups of sleeve joint plates on the same side, and the two ends of the two groups of cross bars on the same side are fixedly connected with the opposite faces of the two groups of mounting plates on the same side.

[0015] Further, the inside bottom face of the mounting box is slidably penetrated through four groups of vertical rods, the upper ends of the two groups of vertical rods on the same side are fixedly connected with the lower part of the lifting box on the same side, and the lower ends of the two groups of vertical rods on the same side are fixedly connected with the upper pressing plate on the same side.

[0016] Compared with the prior art, the hydraulic valve testing device has the following beneficial effects:

[0017] (1) The mounting box and the lifting box are adopted, when the hydraulic valve testing device is actually used, two hydraulic valves can be placed on the upper parts of the two groups of lower pressing plates, and then the controller is used to make the two groups of first self-locking reversible motors and the second self-locking reversible motor work, the output ends of the two groups of first self-locking reversible motors can drive the two groups of bidirectional lead screw levers to rotate, the bidirectional lead screw lever on the same side can push the two groups of lead screw sleeves on the same side to move close to or away from each other, when the two groups of lead screw sleeves make the two groups of clamping plates on the same side clamp one hydraulic valve through the two groups of sleeve joint plates, the two hydraulic valves are stably fixed, the output end of the second self-locking reversible motor can drive the gear to rotate, since the gear is meshed with the two groups of sawtooth plates, the rotating gear can push one group of sawtooth plates to move upwards and the other group of sawtooth plates to move downwards at the same time, one group of lifting boxes moving downwards can drive one group of upper air discharge pipes on the same side and one group of upper pressing plates on the same side to move downwards, when one group of upper pressing plates on the same side and one group of lower pressing plates on the same side clamp one hydraulic valve, the air pump is made to work by using the controller, air can enter the inside of the air storage box through the air guide pipe, the air can enter one hydraulic valve through one group of connecting hoses on the same side, one group of lifting boxes on the same side and one group of upper air discharge pipes on the same side, when one group of pressure valves on the same side detects the change of air pressure, a signal can be sent to the controller, the controller can make the alarm work, another hydraulic valve can be replaced in the testing process, the above operation is repeated alternately, and multiple hydraulic valves can be tested, the mounting box and the lifting box are arranged, the disassembly and assembly of the hydraulic valve can be avoided to affect the testing efficiency, and the working efficiency of the hydraulic valve testing device is improved.

[0018] (2) This utility model uses a socket box. Before actually using the hydraulic valve testing device, the controller is used to make the air pump work, and then the second control valve is opened and closed. The air inside the air tank can be sprayed out through one end of the air guide hose. The sprayed air can blow away the impurities adsorbed on the surface of the hydraulic valve. Then, the two sets of connecting plates are pulled. When the two sets of magnetic plates are separated from the iron socket box, the two sets of springs can push the socket plate to move under their own elastic force. At this time, the two sets of sponge plates can be used to wipe the adsorbed impurities on the surface of the hydraulic valve. After cleaning, the two sets of connecting plates are reset. When the two sets of magnetic plates are pulled out, the two sets of sponge plates can be used to wipe away the impurities adsorbed on the surface of the hydraulic valve. When the iron plate contacts the iron socket box, after the two sets of connecting plates have been reset and cleaned, the air guide hose can be wound around the side wall of the mounting screw. Then, the mounting screw and the two sets of mounting nuts are engaged with each other by thread. The operator rotates the two sets of mounting nuts clockwise and counterclockwise by hand. When the two sets of mounting nuts are in close contact with the two sets of moving orifice plates, the two sets of moving orifice plates can stably clamp the wound air guide hose. The socket box has a cleaning structure, which can clean the impurities adsorbed on the surface of the hydraulic valve in advance, ensuring the continuous use of the hydraulic valve testing device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a hydraulic valve testing device proposed in this utility model;

[0021] Figure 2 This is a front view of a hydraulic valve testing device proposed in this utility model;

[0022] Figure 3 This is a perspective view of the movable perforated plate proposed in this utility model;

[0023] Figure 4 This utility model proposes Figure 1 Enlarged view of A in the middle;

[0024] Figure 5 This utility model proposes Figure 1 Enlarged view of B in the middle;

[0025] Figure 6 This utility model proposes Figure 1 A magnified view of C.

[0026] In the picture:

[0027] 1. Outer casing; 2. Mounting box; 3. Lifting box; 4. Air storage box; 5. Air pump; 6. Connecting hose; 7. First control valve; 8. Air guide hose; 9. Second control valve; 10. Socket box; 11. Upper exhaust pipe; 12. Upper pressure plate; 13. Vertical rod; 14. Lower pressure plate; 15. Lower exhaust pipe; 16. Mounting cover; 17. Pressure sensor; 18. Mounting plate; 19. Bidirectional lead screw; 20. Lead screw sleeve; 21. Socket plate; 22. Clamping plate; 23. Crossbar; 24. First self-locking forward and reverse motor; 25. Gear; 26. Serrated plate; 27. Guide rod; 28. Socket hole plate; 29. ​​Spring; 30. Connecting rod; 31. Connecting plate; 32. Magnet plate; 33. Sponge plate; 34. Mounting screw; 35. Mounting nut; 36. Moving hole plate. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0029] According to an embodiment of the present invention, a hydraulic valve testing device is provided.

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-6As shown, a hydraulic valve testing device according to an embodiment of the present invention includes a housing 1. A mounting box 2 is fixedly inserted through the upper part of the housing 1. Two sets of lifting boxes 3 are arranged inside the mounting box 2. An air storage box 4 is installed on the upper part of the mounting box 2, and an air pump 5 is installed on the upper part of the air storage box 4. An air guide pipe is connected to the output end of the air pump 5, and one end of the air guide pipe is inserted into the interior of the air storage box 4. An air guide hose 8 penetrates the side wall of the air storage box 4, and a socket box 10 is fixedly sleeved on one side wall of the air guide hose 8. Upper exhaust pipes 11 are fixedly inserted through the lower parts of both sets of lifting boxes 3, and the lower ends of both sets of upper exhaust pipes 11 slide through the inner bottom surface of the mounting box 2. Upper pressure plates 12 are fixedly sleeved on the side walls of both sets of upper exhaust pipes 11. Two sets of lower exhaust pipes 15 are fixedly inserted through the inner bottom surface of the housing 1, and the side walls of both sets of lower exhaust pipes 15... A lower pressure plate 14 is fixedly sleeved on the wall. Four sets of mounting plates 18 are installed on the inner bottom surface of the outer casing 1. A bidirectional lead lever 19 is installed between two sets of mounting plates 18 on the same side through a bearing. Two sets of lead screw sleeves 20 are sleeved on the side walls of the two sets of bidirectional lead levers 19. A connecting plate 21 is fixedly sleeved on the side walls of the four sets of lead screw sleeves 20. Clamping plates 22 are fixedly installed on the opposing surfaces of the two sets of connecting plates 21 on the same side. A first self-locking forward and reverse motor 24 is installed on the side walls of the two sets of mounting plates 18 on both sides. A second self-locking forward and reverse motor is installed on the end face of the mounting box 2, and a gear 25 is fixedly sleeved on the output end of the second self-locking forward and reverse motor. A serrated plate 26 is fixedly installed on the opposing surfaces of the two sets of lifting boxes 3. By setting up the mounting box 2 and the lifting box 3, the disassembly and assembly of the hydraulic valve can be avoided from affecting the testing efficiency, thus improving the working efficiency of the hydraulic valve testing device.

[0031] In one embodiment, a second control valve 9 is provided on one side wall of the air guide hose 8. Two sets of guide rods 27 are installed inside the socket box 10, and socket plates 28 are slidably sleeved on the side walls of the two sets of guide rods 27. Springs 29 are sleeved on the side walls of both sets of guide rods 27. Four sets of connecting rods 30 slide through the side wall of the socket box 10. The inner ends of the four sets of connecting rods 30 are fixedly connected to the socket plates 28. Connecting plates 31 are installed on the outer ends of the two sets of connecting rods 30 on the same side. Magnet plates 32 are installed on one side of the two sets of connecting plates 31, and sponge plates 33 are glued to the other side of the two sets of connecting plates 31. An installation screw 34 is installed above the air guide hose 8, and two sets of installation nuts 35 and two sets of moving orifice plates 36 are sleeved on the side wall of the installation screw 34. The socket box 10 has a cleaning structure, which can clean the impurities adsorbed on the surface of the hydraulic valve in advance, thus ensuring the continuous use of the hydraulic valve testing device.

[0032] In one embodiment, the mounting screw 34 is threadedly engaged with two sets of mounting nuts 35, which facilitates adjustment of the usage position of the two sets of mounting nuts 35.

[0033] In one embodiment, a connecting hose 6 runs through both sets of lifting boxes 3 and air storage boxes 4, and a first control valve 7 is provided on the side wall of both sets of connecting hoses 6.

[0034] In one embodiment, gear 25 meshes with two sets of saw blades 26, ensuring that gear 25 can drive the two sets of saw blades 26 to move.

[0035] In one embodiment, two sets of mounting covers 16 are installed on the lower part of the housing 1, and pressure sensors 17 are fixedly inserted through the end faces of both sets of mounting covers 16. An electrical control box is installed on one side of the housing 1, and a controller and an alarm are installed inside the electrical control box. The controller is electrically connected to the alarm, air pump 5, two sets of pressure sensors 17, two sets of first self-locking forward and reverse motors 24 and second self-locking forward and reverse motors via wires. The controller control circuit can be implemented by simple programming by those skilled in the art and is common knowledge in the art. It is only used and not modified, so the control method and circuit connection will not be described in detail.

[0036] In one embodiment, the output ends of the two sets of first self-locking forward and reverse motors 24 are respectively connected to two sets of bidirectional levers 19 via couplings.

[0037] In one embodiment, two sets of crossbars 23 slide through the two sets of socket plates 21 on the same side. The two ends of the two sets of crossbars 23 on the same side are fixedly connected to the opposing surfaces of the two sets of mounting plates 18 on the same side, and the four sets of crossbars 23 can ensure the stability of the movement of the four sets of socket plates 21.

[0038] In one embodiment, four sets of vertical rods 13 slide through the inner bottom surface of the mounting box 2. The upper ends of two sets of vertical rods 13 on the same side are fixedly connected to the lower part of a set of lifting boxes 3 on the same side, and the lower ends of two sets of vertical rods 13 on the same side are fixedly connected to a set of upper pressure plates 12 on the same side. The four sets of vertical rods 13 can ensure the stability of the two sets of lifting boxes 3 moving up and down.

[0039] Working principle:

[0040] In actual use of the hydraulic valve testing device, two hydraulic valves can be placed on the upper part of the two sets of lower pressure plates 14 respectively. Then, using the controller, the two sets of first self-locking forward and reverse motors 24 and second self-locking forward and reverse motors are activated. The output ends of the two sets of first self-locking forward and reverse motors 24 can drive the two sets of bidirectional lead levers 19 to rotate respectively. The rotating bidirectional lead levers 19 on the same side can push the two sets of lead screw sleeves 20 on the same side to move closer or further apart. When the two sets of lead screw sleeves 20 on the same side clamp a hydraulic valve through the two sets of sleeve plates 21 on the same side and the two sets of clamping plates 22 on the same side, the two hydraulic valves are stably fixed. The output end of the second self-locking forward and reverse motor can drive the gear 25 to rotate. Since the gear 25 meshes with the two sets of sawtooth plates 26... When the gear 25 rotates, it can push a set of sawtooth plates 26 upwards and simultaneously push another set of sawtooth plates 26 downwards. The downward-moving lifting box 3 can drive a set of upper exhaust pipes 11 and a set of upper pressure plates 12 on the same side to move downwards. After the set of upper pressure plates 12 and lower pressure plates 14 on the same side clamp a hydraulic valve, the controller is used to make the air pump 5 work. Air can enter the interior of the air storage tank 4 through the air guide pipe. This part of the air can enter a hydraulic valve through a set of connecting hoses 6, a set of lifting boxes 3, and a set of upper exhaust pipes 11 on the same side. When the pressure valve on the same side detects a change in air pressure, it can send a signal to the controller, which can then activate the alarm. During this test, the other hydraulic valve can be adjusted. By alternating and repeating the above operations, multiple hydraulic valves can be tested. The installation box 2 and lifting box 3 prevent the disassembly and assembly of hydraulic valves from affecting testing efficiency, thus improving the working efficiency of the hydraulic valve testing device. Before actually using the hydraulic valve testing device, the controller activates the air pump 5, and then the second control valve 9 is opened and closed. Air from inside the air tank 4 can be ejected through one end of the air guide hose 8. The ejected air can blow away impurities adsorbed on the surface of the hydraulic valve. Then, the two sets of connecting plates 31 are pulled. When the two sets of magnetic plates 32 separate from the iron socket box 10, the two sets of springs 29, under their own elastic force, can push the socket plate 28 to move. At this time, the two sets of sponge plates 33 can be used to wipe the surface of the hydraulic valve. After cleaning, the two sets of connecting plates 31 are reset. When the two sets of magnetic plates 32 come into contact with the iron socket box 10, the two sets of connecting plates 31 are reset. After cleaning, the air guide hose 8 can be wound around the side wall of the mounting screw 34. Then, the mounting screw 34 and the two sets of mounting nuts 35 are engaged by thread. The operator rotates the two sets of mounting nuts 35 clockwise and counterclockwise by hand. When the two sets of mounting nuts 35 are in close contact with the two sets of moving orifice plates 36, the two sets of moving orifice plates 36 can stably clamp the wound air guide hose 8. The socket box 10 has a cleaning structure, which can clean the impurities adsorbed on the surface of the hydraulic valve in advance, and ensure the continuous use of the hydraulic valve testing device.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] 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 within the protection scope of the present utility model.

Claims

1. A hydraulic valve testing apparatus, characterized by, The utility model provides a kind of gas distribution device, including shell (1), the upper portion of the shell (1) is fixedly penetrated with installation box (2), and the inside of installation box (2) is provided with two groups of lifting box (3), the upper portion of installation box (2) is installed with gas storage tank (4), and the upper portion of gas storage tank (4) is installed with air pump (5), and the output end of air pump (5) is connected with air guide pipe, and one end of air guide pipe is inserted into the inside of gas storage tank (4), the side wall of gas storage tank (4) is penetrated with air guide hose (8), and one end of air guide hose (8) is fixedly sleeved with sleeve box (10), the lower portion of two groups of lifting box (3) is fixedly penetrated with upper exhaust pipe (11), and the lower end of two groups of upper exhaust pipe (11) is slidably penetrated with the inside bottom surface of installation box (2), the side wall of two groups of upper exhaust pipe (11) is fixedly sleeved with upper pressing plate (12), the inside bottom surface of shell (1) is fixedly penetrated with two groups of lower exhaust pipe (15), and the side wall of two groups of lower exhaust pipe (15) is fixedly sleeved with lower pressing plate (14), the inside bottom surface of shell (1) is installed with four groups of mounting plate (18), and same side two groups of mounting plate (18) are installed with two-way screw lever (19) by bearing, the side wall of two groups of two-way screw lever (19) is sleeved with two groups of screw sleeve (20), the side wall of four groups of screw sleeve (20) is fixedly sleeved with sleeve plate (21), and same side two groups of sleeve plate (21) are fixedly installed with clamping plate (22) on opposite surfaces, the side wall of two groups of mounting plate (18) on both sides is installed with first self-locking forward and reverse motor (24), the end surface of installation box (2) is installed with second self-locking forward and reverse motor, and the output end of second self-locking forward and reverse motor is fixedly sleeved with gear (25), and the opposite surface of two groups of lifting box (3) is fixedly installed with sawtooth plate (26).

2. A hydraulic valve testing apparatus according to claim 1, wherein One end of the side wall of air guide hose (8) is provided with second control valve (9), two groups of guide rods (27) are installed in the inside of sleeve box (10), and the side wall of two groups of guide rods (27) is slidably sleeved with sleeve hole plate (28), the side wall of two groups of guide rods (27) is sleeved with spring (29), four groups of connecting rods (30) are slidably penetrated in the side wall of sleeve box (10), the inside end of four groups of connecting rods (30) is fixedly connected with sleeve hole plate (28), and the outside end of same side two groups of connecting rods (30) is installed with connecting plate (31), one side of two groups of connecting plate (31) is installed with magnet plate (32), and the other side of two groups of connecting plate (31) is bonded with sponge plate (33), installation screw rod (34) is installed above air guide hose (8), and the side wall of installation screw rod (34) is sleeved with two groups of mounting nuts (35) and two groups of moving hole plates (36).

3. A hydraulic valve testing apparatus as claimed in claim 2, wherein The installation screw rod (34) and two groups of the mounting nut (35) are threadedly matched.

4. The hydraulic valve testing apparatus of claim 1, wherein Two groups of connecting hose (6) are penetrated between two groups of lifting box (3) and gas storage tank (4), and the side wall of two groups of connecting hose (6) is provided with first control valve (7).

5. The hydraulic valve testing apparatus of claim 1, wherein, The gear (25) is engaged with two groups of sawtooth plate (26).

6. The hydraulic valve testing apparatus of claim 1, wherein The lower part of the shell (1) is provided with two groups of mounting covers (16), and the end faces of the two groups of mounting covers (16) are fixedly penetrated through pressure sensors (17); one side of the shell (1) is provided with an electric control box, and the inside of the electric control box is provided with a controller and an alarm; and the controller is electrically connected with the alarm, the air pump (5), the two groups of pressure sensors (17), the two groups of first self-locking forward and reverse motors (24) and the second self-locking forward and reverse motor through wires.

7. The hydraulic valve testing apparatus of claim 1, wherein The output ends of the two groups of first self-locking forward and reverse motors (24) are connected with the two groups of bidirectional lead screws (19) through couplings respectively.

8. The hydraulic valve testing apparatus of claim 1, wherein, Two groups of cross bars (23) are slidably penetrated between the two groups of sleeve joint plates (21) on the same side, and the two ends of the two groups of cross bars (23) on the same side are fixedly connected with the opposite faces of the two groups of mounting plates (18) on the same side.

9. The hydraulic valve testing apparatus of claim 1, wherein, The inside bottom surface of the mounting box (2) is slidably penetrated through four groups of vertical rods (13), the upper ends of the two groups of vertical rods (13) on the same side are fixedly connected with the lower part of the lifting box (3) on the same side, and the lower ends of the two groups of vertical rods (13) on the same side are fixedly connected with the upper pressing plate (12) on the same side.

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