A performance test bench for electromagnetic reversing valve

Abstract

The present application provides a solenoid reversing valve performance test bench, which relates to the technical field of solenoid valve test devices. The solenoid reversing valve performance test bench includes a valve seat, on which a first valve and a second valve are respectively connected to a first valve hole and a second valve hole; an oil supply system, in which the oil supply system is connected to the first valve; an execution oil circuit system, in which the execution oil circuit system is connected to the second valve; a valve plate, in which the valve plate is used to install and connect the tested solenoid reversing valve; a locking member, in which the locking member is used to lock and connect the valve plate and the valve seat; an interlocking mechanism, in which when the valve plate and the valve seat are not locked and connected, the interlocking mechanism can limit the opening of the first valve and the second valve, and when the first valve and the second valve are opened, the interlocking mechanism can act on the locking member to limit the separation of the locking member from the valve plate and the valve seat. This avoids the situation in which the valve plate is not locked and connected to the valve seat during the test of the solenoid reversing valve, or the valve plate is separated from the valve seat before the test is completed, thereby effectively improving the safety of the test.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic valve testing devices, and in particular to an electromagnetic reversing valve performance testing platform. Background Art

[0002] The electromagnetic reversing valve is a directional control valve that uses electromagnetic force to manipulate the valve core to change the direction of oil (or gas) flow. In the hydraulic system, it is mainly used to change the on-off relationship of each oil circuit or control the direction of oil flow, so as to achieve the purpose of controlling the start, stop or change of movement direction of the hydraulic actuator. The electromagnetic reversing valve test bench is a device that can simulate various working conditions and evaluate the performance, quality, safety and reliability of the electromagnetic reversing valve. It is widely used in the production, maintenance, research and development of electromagnetic reversing valves. The electromagnetic reversing valve test bench can be used to perform reversing performance tests, leakage tests, flow pressure loss tests, withstand voltage tests and power supply voltage deviation performance tests on the electromagnetic reversing valve.

[0003] For example, the utility model patent with the publication number CN204738776U discloses a solenoid valve test bench, which includes a desktop, a baffle plate, a system pressure gauge, a return liquid pressure gauge, a column pressure gauge and a column pressure gauge, and a main valve is arranged on the desktop, and the main valve is connected to the return liquid port and the inlet port through pipes. During the test, the test bench is provided with pressure through the high-pressure pump station, and the pressure enters the main valve through the inlet stop valve. The solenoid valve to be tested is installed on the main valve, and the solenoid valve is manually controlled by electric control. The liquid pressure of the solenoid valve, the return liquid pressure, the sensitivity of the solenoid valve and the presence of leakage can be measured respectively through the return liquid pressure gauge, the column pressure gauge and the column pressure gauge.

[0004] However, during the test of the solenoid valve test bench, due to the mistakes of the testers, the test may begin before the solenoid valve is fully connected to the main valve, or the solenoid valve may be separated from the main valve before the test is completed. If the above two situations occur, the high-pressure hydraulic oil in the hydraulic system may spray out from the connection between the solenoid valve and the main valve, thereby posing a certain safety hazard. Summary of the invention

[0005] The purpose of the present application is to provide an electromagnetic reversing valve performance test bench, which is used to solve the problem that during the test process of the electromagnetic valve test bench in the related art, the solenoid valve may be tested before it is fully connected to the main valve, or the solenoid valve may be separated from the main valve before the test is completed, resulting in certain safety hazards.

[0006] The electromagnetic reversing valve performance test bench provided in this application adopts the following technical solution:

[0007] A solenoid reversing valve performance test bench, comprising:

[0008] a valve seat, wherein the valve seat is provided with a first valve hole and a second valve hole, and a first valve and a second valve connected to the first valve hole and the second valve hole respectively;

[0009] an oil supply system, the oil supply system being connected to the first valve;

[0010] an execution oil circuit system, wherein the execution oil circuit system is connected to the second valve;

[0011] a valve plate, the valve plate being used to install and connect with the electromagnetic reversing valve to be tested, and the electromagnetic reversing valve to be tested can be connected with the first valve hole and the second valve hole through the valve plate;

[0012] A locking member, the locking member is used to lock and connect the valve plate and the valve seat;

[0013] An interlocking mechanism, when the valve plate and the valve seat are not locked and connected, the interlocking mechanism can limit the opening of the first valve and the second valve; when the first valve and the second valve are opened, the interlocking mechanism can act on the locking member to limit the separation of the locking member from the valve plate and the valve seat.

[0014] Optionally, the oil supply system includes a main oil tank, an oil return line, an oil supply line and a pressurized oil line, the oil return line is connected to the main oil tank, the oil supply line is connected to the main oil tank through a main pump, the pressurized oil line is connected to the main oil tank through a pressurized pump, the oil supply line is connected to the pressurized oil line through a reversing solenoid valve, and the oil return line, oil supply line and pressurized oil line are used to be connected to the first valve.

[0015] Optionally, the execution oil circuit system includes two main lines and two branch lines connected to the main lines, the two main lines are respectively connected to the second valve, the two branch lines are connected in parallel, one of the branch lines is provided with two first one-way valves, the other branch line is provided with two second one-way valves, the two branch lines are connected through an intermediate line, and the intermediate line is provided with a load loading valve.

[0016] Optionally, the locking member is a bolt with a locking groove provided on the bolt, the first valve is a first ball valve, the first ball valve is synchronously opened and closed with the second valve, the interlocking mechanism includes a first locking pin and a second locking pin provided on the valve seat, a first pin hole is provided on the first valve stem of the first ball valve, when the valve plate is not locked and connected to the valve seat, the first locking pin is plugged into the first pin hole, and when the first ball valve and the second valve are opened, the second locking pin is engaged with the locking groove.

[0017] Optionally, the interlocking mechanism also includes a transmission member, which is arranged on the valve seat and connected to the first locking pin. When the bolt is connected to the valve plate and the valve seat, it can act on the transmission member and drive the first locking pin to separate from the first pin hole through the transmission member until the locking groove is aligned with the second locking pin.

[0018] Optionally, it also includes a vacuum pump, a vacuum chamber and an interlocking mechanism, the valve seat is provided with an exhaust hole connected to the first valve hole, the vacuum chamber is connected to the exhaust hole through a third valve, the vacuum pump is connected to the vacuum chamber, when the vacuum chamber does not reach a vacuum state, the interlocking mechanism can limit the third valve from closing, when the third valve is in an open state, the interlocking mechanism can limit the first valve and the second valve from opening, and when the first valve and the second valve are opened, the interlocking mechanism can limit the third valve from opening.

[0019] Optionally, the interlocking mechanism includes a sliding column and a fourth locking pin, the sliding column is arranged on the vacuum chamber, the sliding column is provided with a third locking pin and a limiting hole, the first valve stem is provided with a second pin hole, when the third valve is in an open state, the third locking pin is plugged into the second pin hole, the fourth locking pin is arranged on the valve seat, when the first valve and the second valve are opened, the fourth locking pin is plugged into the limiting hole.

[0020] Optionally, the interlocking mechanism also includes a piston and a reset elastic member. The vacuum chamber is provided with a cylinder body which penetrates the interior thereof. The piston is slidably arranged in the cylinder body. A locking column is provided on the piston. The third valve is a third ball valve. A locking hole is provided on the third valve stem of the third ball valve. When the vacuum chamber does not reach a vacuum state, the locking column is plugged into the locking hole under the action of the reset elastic member.

[0021] Optionally, the third valve stem is connected to the sliding column. When the third ball valve switches from open to closed, the third valve stem can drive the sliding column to slide until the limiting hole is aligned with the fourth locking pin. When the limiting hole is aligned with the fourth locking pin, the third locking pin is separated from the second pin hole.

[0022] Optionally, it also includes a linkage part, which is arranged on the valve seat, and the first valve stem is connected to the second lock pin and the fourth lock pin through the linkage part. When the first ball valve is switched from closed to open, the first valve stem can drive the second lock pin to engage with the lock groove and the fourth lock pin to engage with the limit hole through the linkage part.

[0023] In summary, the present application includes at least the following beneficial technical effects: when the electromagnetic reversing valve performance test bench of the present application is used to test the electromagnetic reversing valve to be tested, the electromagnetic reversing valve to be tested is first fixedly installed on the valve plate and connected to the valve plate. At the beginning and end of the test, the electromagnetic reversing valve to be tested and the valve plate are installed and disassembled as a whole with the valve seat. At the beginning of the test, the valve plate is connected to the valve seat by a locking member. When the valve plate is not locked and connected to the valve seat, the interlocking mechanism can limit the opening of the first valve and the second valve, so that the test cannot be started. When the first valve and the second valve are opened, the interlocking mechanism can act on the locking member to limit the separation of the locking member from the valve plate and the valve seat, so that the valve plate and the valve seat can be separated only after the first valve and the second valve are closed to end the test. This avoids the situation in which the valve plate is not locked and connected to the valve seat during the test of the electromagnetic reversing valve, or the valve plate is separated from the valve seat before the test is completed, effectively improving the test safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the electromagnetic reversing valve performance test bench in the embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the electromagnetic reversing valve performance test bench in the embodiment of the present application;

[0026] Figure 3 A schematic diagram of a solenoid reversing valve to be tested in an embodiment of the present application;

[0027] Figure 4 This is a first-view structural diagram of the electromagnetic reversing valve performance test bench in the embodiment of the present application after omitting parts such as the cabinet;

[0028] Figure 5 This is a second perspective structural diagram of the electromagnetic reversing valve performance test bench in the embodiment of the present application after omitting parts such as the cabinet;

[0029] Figure 6 This is a cross-sectional view from a third perspective of the electromagnetic reversing valve performance test bench in the embodiment of the present application after omitting parts such as the cabinet;

[0030] Figure 7 This is a sectional view from a fourth perspective of the electromagnetic reversing valve performance test bench in the embodiment of the present application after omitting parts such as the cabinet;

[0031] Figure 8 for Figure 7 A partial enlarged schematic diagram of part A;

[0032] Fig. 9 for Figure 8 A partial enlarged schematic diagram of part B;

[0033] Fig.10This is a cross-sectional view from a fifth perspective of the electromagnetic reversing valve performance test bench in the embodiment of the present application after omitting parts such as the cabinet;

[0034] Fig.11 for Fig.10 A partial enlarged schematic diagram of part C in the middle.

[0035] Description of reference numerals:

[0036] 10. Cabinet; 20. Oil supply system; 21. Main oil tank; 22. Oil return pipeline; 221. Return port; 23. Oil supply pipeline; 231. Oil supply port; 24. Pressurized oil circuit; 241. Pressurized port; 25. Auxiliary oil tank; 26. Filter; 27. Main pump; 28. Pressurized pump; 29. ​​Reversing solenoid valve; 210. Oil supply branch; 211. Third one-way valve; 212. High-pressure stop valve; 213. Fourth one-way valve; 214. Oil return branch; 215. Pump port loading valve; 216. Back pressure loading valve; 217. Cooling mechanism;

[0037] 30. Execution oil system; 31. Main pipeline; 311. Execution port; 32. Branch pipeline; 33. First check valve; 34. Second check valve; 35. Intermediate pipeline; 36. Load loading valve; 37. Flow meter; 38. Pressure gauge; 39. Three-way ball valve; 310. Leakage measuring cup;

[0038] 40. Valve seat; 41. First valve hole; 42. Second valve hole; 43. First ball valve; 431. First valve stem; 432. First pin hole; 433. Second pin hole; 434. First synchronous gear; 44. Second ball valve; 441. Second valve stem; 442. Second synchronous gear; 45. Guide groove; 46. Locking screw hole; 47. Air extraction hole; 48. Boss; 50. Valve plate; 51. First channel; 52. Second channel; 53. Mounting screw hole; 54. Through hole ; 60, interlocking mechanism; 61, first lock pin; 611, transmission gear row; 62, second lock pin; 621, first groove; 63, transmission rack; 64, transmission gear; 65, return spring; 70, interlocking mechanism; 71, slide column; 711, third lock pin; 712, limit hole; 713, driven gear row; 72, fourth lock pin; 721, second groove; 73, piston; 731, lock column; 732, guide column; 74, return spring; 75, intermediate gear;

[0039] 80. Bolt; 81. Locking groove; 90. Vacuum chamber; 91. Connecting port; 92. Cylinder; 921. Bracket; 100. Vacuum gauge; 110. Synchronous rack; 120. Third ball valve; 121. Third valve stem; 122. Locking hole; 123. Driving gear; 130. Linkage member; 131. Rotating shaft; 132. Screw sleeve; 133. First bevel gear pair; 134. Second bevel gear pair; 140. Solenoid reversing valve to be tested; 141. Oil inlet; 142. Oil return port; 143. Working oil port. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1 -Attached Fig.11 , further details of this application are given.

[0041] Example 1

[0042] This embodiment discloses a solenoid reversing valve performance test bench.

[0043] A solenoid reversing valve performance test bench comprises a cabinet 10, a valve seat 40, an oil supply system 20, an execution oil circuit system 30, a valve plate 50, a locking member, an interlocking mechanism 60 and a linkage member 130.

[0044] Reference Figures 1 to 6 The valve seat 40 is fixed in the cabinet 10, and is provided with a first valve hole 41 and a second valve hole 42, and a first valve and a second valve respectively connected to the first valve hole 41 and the second valve hole 42. The oil supply system 20 and the execution oil circuit system 30 are arranged in the cabinet 10, and the oil supply system 20 is connected to the first valve, and the execution oil circuit system 30 is connected to the second valve.

[0045] In an optional embodiment, the specific structures of the oil supply system 20 and the execution oil circuit system 30, and the connection relationship between the first valve and the second valve are as follows:

[0046] The oil supply system 20 includes a main oil tank 21, an oil return line 22, an oil supply line 23, a pressurized oil line 24 and an auxiliary oil tank 25. The oil return line 22 is connected to the main oil tank 21 through a filter 26, the oil supply line 23 is connected to the main oil tank 21 through a main pump 27, the pressurized oil line 24 is connected to the main oil tank 21 through a pressurized pump 28, and the oil supply line 23 is connected to the pressurized oil line 24 through a reversing solenoid valve 29 and an oil supply branch line 210. A return port 221 is provided on the oil return line 22, an oil supply port 231 is provided on the oil supply line 23, and a pressurized oil line 24 is provided on the pressurized oil line 24. The oil return line 22, the oil supply line 23 and the pressurized oil line 24 are used to be connected to the first valve through the return port 221, the oil supply port 231 and the pressurized port 241, respectively.

[0047] A third one-way valve 211 is provided on the oil supply branch 210, the auxiliary oil tank 25 is connected to the reversing solenoid valve 29, the oil supply branch 210 is connected to the auxiliary oil tank 25 through a high-pressure shut-off valve 212, a fourth one-way valve 213 is provided on the pressurized oil circuit 24, the oil supply pipeline 23 is connected to the return oil pipeline 22 through an oil return branch 214, a pump port loading valve 215 is provided on the oil return branch 214, a back pressure loading valve 216 is provided on the return oil pipeline 22, and a cooling mechanism 217 for cooling the hydraulic oil inside the main oil tank 21 is provided on the main oil tank 21.

[0048] Reference Figures 1 to 6 The execution oil circuit system 30 includes two main pipes 31 and two branch pipes 32 connected to the main pipes 31. The main pipes 31 are provided with execution ports 311. The two main pipes 31 are respectively connected to the second valve through the execution ports 311. The two branch pipes 32 are connected in parallel. Two first check valves 33 are provided on one branch pipe 32, and two second check valves 34 are provided on the other branch pipe 32. The two branch pipes 32 are connected through an intermediate pipe 35. The intermediate pipe 35 is provided with a load loading valve 36 and a flow meter 37. Pressure gauges 38 are respectively provided on the main pipe 31, the return oil pipe 22, the oil supply pipe 23, the pressurized oil pipe 24 and the return oil branch 214. Three-way ball valves 39 are provided on the main pipe 31 and the return oil pipe 22. A leakage measuring cup 310 is provided below the three-way ball valve 39.

[0049] The valve plate 50 is used to install and communicate with the tested electromagnetic reversing valve 140. More specifically, the valve plate 50 is provided with mounting screw holes 53 for installing the tested electromagnetic reversing valve 140. The tested electromagnetic reversing valve 140 can be fixedly installed on the valve plate 50 by using connecting parts such as screws that are compatible with the mounting screw holes 53. The tested electromagnetic reversing valve 140 can be communicated with the first valve hole 41 and the second valve hole 42 through the valve plate 50. More specifically, the valve plate 50 is provided with a first channel 51 for communicating with the first valve hole 41, and a second channel 52 for communicating with the second valve hole 42. After the tested electromagnetic reversing valve 140 is connected with the first channel 51 and the second channel 52 of the valve plate 50, it can achieve communication with the first valve hole 41 and the second valve hole 42.

[0050] The electromagnetic reversing valve performance test bench of the present application is used to test the two-position four-way electromagnetic reversing valve, so the number of the first valve hole 41 and the second valve hole 42 are respectively set to two, and accordingly, the number of the first valve and the second valve are respectively two, and the number of the first channel 51 and the second channel 52 are respectively two. When it is necessary to perform a reversing performance test, a leakage test and a flow pressure loss test on the electromagnetic reversing valve 140 under test, the return oil pipeline 22 and the supply oil pipeline 23 are connected to the two first valves through the return port 221 and the supply port 231 respectively. Then, the solenoid reversing valve 140 to be tested is fixedly installed on the valve plate 50, the two working oil ports 143 of the solenoid reversing valve 140 to be tested are connected with the two second channels 52 of the valve plate 50, and the oil inlet 141 and the oil return port 142 of the solenoid reversing valve 140 to be tested are connected with the two first channels 51 of the valve plate 50 respectively. Then, the valve plate 50 is installed on the valve seat 40, so that the first channel 51 is connected with the first valve hole 41, and the second channel 52 is connected with the second valve hole 42. At the same time, the oil inlet 141 of the solenoid reversing valve 140 to be tested corresponds to the oil supply pipeline 23, and the oil return port 142 of the solenoid reversing valve 140 to be tested corresponds to the oil return pipeline 22.

[0051] Next, the first valve and the second valve are opened, and the hydraulic oil in the main oil tank 21 is pumped to the electromagnetic reversing valve 140 to be tested through the main pump 27 via the oil supply pipeline 23. Then, the hydraulic oil flows through one of the main pipelines 31, one of the branch pipelines 32, the intermediate pipeline 35, another branch pipeline 32 and another main pipeline 31, and then flows back to the electromagnetic reversing valve 140 to be tested, and then flows back to the main oil tank 21 via the return pipeline 22. In this process, the pressure of the hydraulic oil in the pipeline is measured by the pressure gauge 38, the leakage of the hydraulic oil in the pipeline is measured by the leakage measuring cup 310, and the flow rate of the hydraulic oil in the pipeline is measured by the flow meter 37, so as to realize relevant tests.

[0052] When it is necessary to perform a pressure test on the electromagnetic reversing valve 140 under test, the oil supply port 231 is separated from the first valve, the pressurizing port 241 is connected to the first valve, and the direction is switched through the reversing solenoid valve 29, so that the hydraulic oil in the main oil tank 21 is pumped to the electromagnetic reversing valve 140 under test through the oil supply pipeline 23, the oil supply branch 210 and the pressurizing oil circuit 24. At the same time, the hydraulic oil in the main oil tank 21 is pumped to the electromagnetic reversing valve 140 under test through the pressurizing oil circuit 24 by the pressurizing pump 28 to complete the pressurization, so as to realize the pressure test.

[0053] Reference Figures 4 to 11 During the test of the electromagnetic reversing valve 140, in order to avoid starting the test before the valve plate 50 is locked and connected with the valve seat 40, or separating the valve plate 50 from the valve seat 40 before the test is completed, the electromagnetic reversing valve performance test bench of this embodiment is implemented by the following structure:

[0054] The locking member is used to lock and connect the valve plate 50 and the valve seat 40. When the valve plate 50 and the valve seat 40 are not locked and connected, the interlocking mechanism 60 can limit the opening of the first valve and the second valve, so that the test cannot be started. When the first valve and the second valve are opened, the interlocking mechanism 60 can act on the locking member to limit the separation of the locking member from the valve plate 50 and the valve seat 40, so that the valve plate 50 and the valve seat 40 can be separated only after the first valve and the second valve are closed to end the test.

[0055] In an optional embodiment, the locking member and the interlocking mechanism 60 may adopt the following structure: the locking member may adopt a bolt 80, a through hole 54 is provided on the valve plate 50, a locking screw hole 46 is provided on the valve seat 40, and the bolt 80 can be inserted into the through hole 54 and screwed with the locking screw hole 46. A locking groove 81 is provided on the bolt 80, the first valve is a first ball valve 43, and the first ball valve 43 is synchronously opened and closed with the second valve through a synchronous rack 110, more specifically, a first synchronous gear 434 is provided on a first valve stem 431 of the first ball valve 43, the second valve is a second ball valve 44, and a second synchronous gear 442 is provided on a second valve stem 441 of the second ball valve 44, and the synchronous rack 110 is slidably provided in the cabinet 10 and meshes with the first synchronous gear 434 and the second synchronous gear 442.

[0056] The interlocking mechanism 60 includes a first locking pin 61 and a second locking pin 62 provided on the valve seat 40, and a first pin hole 432 is provided on the first valve stem 431 of the first ball valve 43. When the valve plate 50 and the valve seat 40 are not locked and connected, the first locking pin 61 is plugged into the first pin hole 432, thereby limiting the rotation of the first valve stem 431, and further limiting the opening of the first valve and the second valve. When the first ball valve 43 and the second valve are opened, the second locking pin 62 is engaged with the locking groove 81, thereby limiting the separation of the bolt 80 from the valve plate 50 and the valve seat 40.

[0057] In an optional embodiment, the interlocking mechanism 60 can drive the first locking pin 61 to operate via a transmission member. More specifically, the transmission member is provided on the valve seat 40 and is connected to the first locking pin 61. When the bolt 80 is connected to the valve plate 50 and the valve seat 40, it can act on the transmission member and drive the first locking pin 61 to separate from the first pin hole 432 via the transmission member until the locking groove 81 is aligned with the second locking pin 62.

[0058] Furthermore, the transmission member includes a transmission rack 63, a transmission gear 64 and a return spring 65. The valve seat 40 is provided with a guide groove 45 which penetrates the locking screw hole 46. The transmission rack 63 is slidably arranged in the guide groove 45. The first lock pin 61 is provided with a transmission gear row 611. The transmission gear 64 is rotatably arranged on the valve seat 40 and meshes with the transmission rack 63 and the transmission gear row 611. The end of the bolt 80 can abut against one end of the transmission rack 63. The return spring 65 is arranged in the guide groove 45. The two ends of the return spring 65 respectively abut against the other end of the transmission rack 63 and the inner end surface of the guide groove 45.

[0059] When the end of the bolt 80 does not abut against one end of the transmission rack 63, the first ball valve 43 is in a closed state, and the first lock pin 61 is plugged into the first pin hole 432 under the elastic force of the return spring 65. When the bolt 80 is fully installed and the valve plate 50 is locked and connected with the valve seat 40, the end of the bolt 80 pushes the transmission rack 63, and drives the first lock pin 61 to slide and separate from the first pin hole 432 through the transmission gear 64 and the transmission gear row 611. Only then can the first valve stem 431 be rotated to open the first ball valve 43, and at the same time, the second ball valve 44 is driven to open through the synchronization rack 110 for testing.

[0060] The linkage 130 is disposed on the valve seat 40, and the first valve stem 431 is connected to the second lock pin 62 through the linkage 130. When the electromagnetic reversing valve 140 to be tested starts testing and switches the first ball valve 43 from closed to open, the first valve stem 431 can drive the second lock pin 62 to engage with the lock groove 81 through the linkage 130, thereby limiting the bolt 80 from separating from the valve plate 50 and the valve seat 40, so that the valve plate 50 and the valve seat 40 can be separated only after the first valve and the second valve are closed to end the test.

[0061] Example 2

[0062] This embodiment discloses a solenoid reversing valve performance test bench.

[0063] The electromagnetic reversing valve performance test bench of this embodiment is different from that of Embodiment 1 in that it further includes a vacuum pump, a vacuum chamber 90 , a vacuum gauge 100 and an interlocking mechanism 70 .

[0064] Reference Figures 4 to 11 , the valve seat 40 is provided with an air extraction hole 47 connected with the first valve hole 41, the vacuum chamber 90 is fixedly connected with the valve seat 40, the vacuum chamber 90 is connected with the air extraction hole 47 through the third valve, the vacuum pump is arranged in the cabinet 10, the vacuum gauge 100 is connected with the inside of the vacuum chamber 90, the vacuum chamber 90 is provided with a connection port 91, and the vacuum pump is connected with the vacuum chamber 90 through the connection port 91. When the valve plate 50 and the valve seat 40 are locked and connected, before opening the first valve and the second valve to test the electromagnetic reversing valve 140 to be tested, the electromagnetic reversing valve 140 to be tested, the first valve hole 41, the second valve hole 42, the first channel 51 and the second channel 52 can be vacuumized by the vacuum pump to discharge the air to avoid affecting the test results.

[0065] When the vacuum state is not reached inside the vacuum chamber 90, the interlock mechanism 70 can limit the third valve from closing, thereby avoiding incomplete vacuuming due to the test personnel's mistaken operation of closing the third valve before the vacuuming is completed. In an optional embodiment, the interlock mechanism 70 realizes the above function through structures such as a piston 73 and a reset elastic member: the vacuum chamber 90 is provided with a cylinder 92 that penetrates the interior thereof, the piston 73 is slidably arranged in the cylinder 92, the piston 73 is provided with a lock column 731, the third valve is a third ball valve 120, and the third valve stem 121 of the third ball valve 120 is provided with a lock hole 122. The reset elastic member is a reset spring 74, a guide column 732 is provided on the piston 73, a bracket 921 is provided on the cylinder 92, the guide column 732 is slidably arranged in the bracket 921, the reset spring 74 is sleeved on the outside of the guide column 732, and the two ends of the reset spring 74 are respectively in contact with the bracket 921 and the piston 73. When the vacuum state is not reached inside the vacuum chamber 90, the lock column 731 is plugged into the lock hole 122 under the action of the reset elastic member, thereby limiting the rotation of the third valve stem 121 to prevent the third ball valve 120 from opening. When the vacuum state is reached inside the vacuum chamber 90, the piston 73 is pushed to slide toward the inside of the vacuum chamber 90 under the action of the air pressure difference between the inside and outside of the vacuum chamber 90, so that the lock column 731 withdraws from the lock hole 122, and the third ball valve 120 can be closed.

[0066] When the third valve is in the open state, the interlocking mechanism 70 can restrict the opening of the first valve and the second valve, thereby preventing the first valve and the second valve from opening when the third valve is not closed, causing the hydraulic oil to enter the vacuum chamber 90. In an optional embodiment, the interlocking mechanism 70 realizes the above function through a structure such as a slide column 71: the slide column 71 is arranged on the vacuum chamber 90, the slide column 71 is provided with a third lock pin 711, and the first valve stem 431 is provided with a second pin hole 433. When the third valve is in the open state, the third lock pin 711 is plugged into the second pin hole 433, thereby restricting the rotation of the first valve stem 431, preventing the first valve and the second valve from opening when the third valve is not closed.

[0067] The third valve stem 121 is connected to the slide column 71 through the intermediate gear 75 and other structures. When the vacuum pump is finished, the lock column 731 withdraws from the lock hole 122, and then the third valve stem 121 is rotated to close the third ball valve 120. In the process of switching the third ball valve 120 from opening to closing, the third lock pin 711 can be driven to separate from the second pin hole 433, and the lock of the first valve and the second valve is released. More specifically, the third valve stem 121 is provided with a driving gear 123, the slide column 71 is provided with a driven gear row 713, and the intermediate gear 75 is rotatably provided on the vacuum chamber 90 and meshes with the driving gear 123 and the driven gear row 713. When the third valve stem 121 rotates, the slide column 71 can be driven to slide through the driving gear 123, the intermediate gear 75 and the driven gear row 713, thereby driving the third lock pin 711 to separate from the second pin hole 433.

[0068] When the third ball valve 120 is closed, the first valve and the second valve can be opened for testing. When the first valve and the second valve are opened, the interlocking mechanism 70 can limit the opening of the third valve, thereby preventing the hydraulic oil from entering the vacuum chamber 90 due to the test personnel's mistaken operation of opening the third valve when the first valve and the second valve are opened. In an optional embodiment, the interlocking mechanism 70 realizes the above function through a structure such as a fourth lock pin 72: a limit hole 712 is provided on the slide column 71, and the fourth lock pin 72 is provided on the valve seat 40. When the first valve and the second valve are opened, the fourth lock pin 72 is plugged into the limit hole 712, thereby limiting the sliding of the slide column 71, so that the third valve stem 121 cannot rotate, thereby preventing the third valve from being opened when the first valve and the second valve are opened.

[0069] When the third ball valve 120 switches from open to closed, the third valve stem 121 can drive the slide column 71 to slide until the limiting hole 712 is aligned with the fourth lock pin 72. When the limiting hole 712 is aligned with the fourth lock pin 72, the third lock pin 711 is separated from the second pin hole 433. The first valve stem 431 is connected to the fourth lock pin 72 through the linkage 130. When the third ball valve 120 is closed, the limiting hole 712 is aligned with the fourth lock pin 72. Then the first ball valve 43 and the second ball valve 44 can be opened for testing. When the first ball valve 43 switches from closed to open, the first valve stem 431 can drive the fourth lock pin 72 to plug into the limiting hole 712 through the linkage 130, thereby limiting the sliding of the slide column 71.

[0070] In an optional embodiment, the specific structure of the linkage member 130, and the specific connection relationship between the linkage member 130 and the second lock pin 62 and the fourth lock pin 72 are as follows: the linkage member 130 includes a rotating shaft 131 and a screw sleeve 132, the rotating shaft 131 and the screw sleeve 132 are rotatably arranged on the valve seat 40, one end of the rotating shaft 131 is connected to the first valve stem 431 through a first bevel gear pair 133, and the other end of the rotating shaft 131 is connected to the screw sleeve 132 through a second bevel gear pair 134, two groups of internal threads with opposite rotation directions are provided on the inner wall of the screw sleeve 132, the second lock pin 62 and the fourth lock pin 72 are respectively provided with external threads, the second lock pin 62 and the fourth lock pin 72 are respectively screwed with the two groups of internal threads with opposite rotation directions on the inner wall of the screw sleeve 132 through the external threads, the second lock pin 62 and the fourth lock pin 72 are respectively provided with a first groove 621 and a second groove 721, and the valve seat 40 is provided with a boss 48 respectively engaged with the first groove 621 and the second groove 721.

[0071] When the first ball valve 43 switches from closed to open, the first valve stem 431 rotates and drives the screw sleeve 132 to rotate through the rotating shaft 131, and then drives the second locking pin 62 and the fourth locking pin 72 to move axially through the screw sleeve 132, so that the second locking pin 62 is engaged with the locking groove 81, and the fourth locking pin 72 is plugged into the limiting hole 712, thereby limiting the separation of the bolt 80 from the valve plate 50 and the valve seat 40, and limiting the sliding of the sliding column 71, so that the valve plate 50 and the valve seat 40 can be separated and the third valve can be opened only after the first valve and the second valve are closed to end the test.

[0072] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A solenoid reversing valve performance test bench, characterized in that: include: A valve seat (40), wherein the valve seat (40) is provided with a first valve hole (41) and a second valve hole (42), and a first valve and a second valve respectively connected to the first valve hole (41) and the second valve hole (42); an oil supply system (20), the oil supply system (20) being connected to the first valve; an execution oil circuit system (30), wherein the execution oil circuit system (30) is connected to the second valve; a valve plate (50), the valve plate (50) being used for installing and communicating with the electromagnetic reversing valve (140) to be tested, the electromagnetic reversing valve (140) to be tested being able to communicate with the first valve hole (41) and the second valve hole (42) through the valve plate (50); A locking member, the locking member being used to lock and connect the valve plate (50) and the valve seat (40); An interlocking mechanism (60) is provided, wherein when the valve plate (50) and the valve seat (40) are not locked and connected, the interlocking mechanism (60) can limit the opening of the first valve and the second valve; when the first valve and the second valve are opened, the interlocking mechanism (60) can act on the locking member to limit the separation of the locking member from the valve plate (50) and the valve seat (40).

2. The electromagnetic reversing valve performance test bench according to claim 1 is characterized in that: The oil supply system (20) comprises a main oil tank (21), an oil return pipeline (22), an oil supply pipeline (23) and a pressurized oil circuit (24); the oil return pipeline (22) is in communication with the main oil tank (21); the oil supply pipeline (23) is in communication with the main oil tank (21) via a main pump (27); the pressurized oil circuit (24) is in communication with the main oil tank (21) via a pressurized pump (28); the oil supply pipeline (23) is in communication with the pressurized oil circuit (24) via a reversing solenoid valve (29); and the oil return pipeline (22), the oil supply pipeline (23) and the pressurized oil circuit (24) are used to be connected to the first valve.

3. The electromagnetic reversing valve performance test bench according to claim 1 is characterized in that: The execution oil circuit system (30) comprises two main pipes (31) and two branch pipes (32) connected to the main pipes (31). The two main pipes (31) are respectively connected to the second valve. The two branch pipes (32) are connected in parallel. One of the branch pipes (32) is provided with two first one-way valves (33), and the other branch pipe (32) is provided with two second one-way valves (34). The two branch pipes (32) are connected via an intermediate pipe (35), and a load loading valve (36) is provided on the intermediate pipe (35).

4. The electromagnetic reversing valve performance test bench according to claim 1 is characterized in that: The locking member is a bolt (80), and a locking groove (81) is provided on the bolt (80); the first valve is a first ball valve (43), and the first ball valve (43) is synchronously opened and closed with the second valve; the interlocking mechanism (60) comprises a first locking pin (61) and a second locking pin (62) provided on the valve seat (40); a first pin hole (432) is provided on the first valve stem (431) of the first ball valve (43); when the valve plate (50) and the valve seat (40) are not locked and connected, the first locking pin (61) is plugged into the first pin hole (432); when the first ball valve (43) and the second valve are opened, the second locking pin (62) is engaged with the locking groove (81).

5. The electromagnetic reversing valve performance test bench according to claim 4 is characterized in that: The interlocking mechanism (60) also includes a transmission member, which is arranged on the valve seat (40) and connected to the first locking pin (61). When the bolt (80) is connected to the valve plate (50) and the valve seat (40), it can act on the transmission member and drive the first locking pin (61) to separate from the first pin hole (432) through the transmission member until the locking groove (81) is aligned with the second locking pin (62).

6. The electromagnetic reversing valve performance test bench according to claim 4 is characterized in that: The invention also comprises a vacuum pump, a vacuum chamber (90) and an interlocking mechanism (70); the valve seat (40) is provided with an exhaust hole (47) which is in communication with the first valve hole (41); the vacuum chamber (90) is connected to the exhaust hole (47) via a third valve; the vacuum pump is connected to the vacuum chamber (90); when the vacuum chamber (90) does not reach a vacuum state, the interlocking mechanism (70) can limit the third valve from closing; when the third valve is in an open state, the interlocking mechanism (70) can limit the first valve and the second valve from opening; when the first valve and the second valve are opened, the interlocking mechanism (70) can limit the third valve from opening.

7. The electromagnetic reversing valve performance test bench according to claim 6, characterized in that: The interlocking mechanism (70) comprises a slide column (71) and a fourth lock pin (72); the slide column (71) is arranged on the vacuum chamber (90); the slide column (71) is provided with a third lock pin (711) and a limit hole (712); the first valve stem (431) is provided with a second pin hole (433); when the third valve is in an open state, the third lock pin (711) is plugged into the second pin hole (433); the fourth lock pin (72) is arranged on the valve seat (40); when the first valve and the second valve are opened, the fourth lock pin (72) is plugged into the limit hole (712).

8. The electromagnetic reversing valve performance test bench according to claim 7 is characterized in that: The interlocking mechanism (70) further comprises a piston (73) and a reset elastic member. The vacuum chamber (90) is provided with a cylinder (92) which is in communication with the interior thereof. The piston (73) is slidably arranged in the cylinder (92). The piston (73) is provided with a locking column (731). The third valve is a third ball valve (120). A locking hole (122) is provided on the third valve stem (121) of the third ball valve (120). When the interior of the vacuum chamber (90) does not reach a vacuum state, the locking column (731) is plugged into the locking hole (122) under the action of the reset elastic member.

9. The electromagnetic reversing valve performance test bench according to claim 8, characterized in that: The third valve stem (121) is connected to the sliding column (71). When the third ball valve (120) is switched from open to closed, the third valve stem (121) can drive the sliding column (71) to slide until the limiting hole (712) is aligned with the fourth locking pin (72). When the limiting hole (712) is aligned with the fourth locking pin (72), the third locking pin (711) is separated from the second pin hole (433).

10. The electromagnetic reversing valve performance test bench according to claim 7, characterized in that: The invention also includes a linkage member (130), wherein the linkage member (130) is arranged on the valve seat (40), and the first valve stem (431) is connected to the second lock pin (62) and the fourth lock pin (72) through the linkage member (130). When the first ball valve (43) is switched from closed to open, the first valve stem (431) can drive the second lock pin (62) to engage with the lock groove (81) through the linkage member (130), and the fourth lock pin (72) to engage with the limiting hole (712).

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