Solenoid valve test bench

Abstract

The invention discloses an electromagnetic valve test bench which comprises a main body unit, a force test unit and a displacement test unit, the force test unit and the displacement test unit are both detachably connected with the main body unit, and the flexible adaptability of the electromagnetic valve test bench is improved. When the force testing unit is connected with the main body unit, the clamping fixture can fix the to-be-tested electromagnetic valve, and after the lifting platform and the main body lifting platform cooperate to drive a valve element of the to-be-tested electromagnetic valve to generate target displacement, the force sensor is used for testing electromagnetic force. When the displacement test unit is connected with the main body unit, the clamping fixture fixes the to-be-tested solenoid valve, the main body lifting platform drives the valve core of the to-be-tested solenoid valve to move to adjust the air gap of the electromagnet, the displacement sensor is used for testing the valve core displacement response of the to-be-tested solenoid valve, and the to-be-tested solenoid valve can be connected with a load to carry out on-load test. Under the condition that the structure of the main body unit is not changed, the force test unit or the displacement test unit can be selectively installed to meet different test requirements.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic valve testing, in particular to an electromagnetic valve testing bench. Background Art

[0002] The electromagnetic force and valve core displacement response of the solenoid valve are important indicators to measure the quality of the solenoid valve design. Especially for the solenoid valve with a very compact design, the internal space is limited and it is impossible to install and arrange sensors for measurement, so an additional test bench needs to be designed for testing.

[0003] In the prior art, when testing solenoid valves of different types and specifications, a special test bench needs to be equipped according to the specific structure of the solenoid valve, and the test efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to provide a solenoid valve test bench to solve the problems existing in the above-mentioned related technologies, improve the adaptability of the solenoid valve test bench, and further improve the test efficiency.

[0005] To achieve the above object, the present invention provides the following solutions: The present invention provides a solenoid valve test bench, comprising: A main body unit, the main body unit comprises a main body bracket, a mounting column, a fixture mounting plate, a clamping fixture and a main body lifting platform, the mounting column is slidably connected to the main body bracket, the sliding direction is parallel to the horizontal direction and the relative positions of the two can be fixed, the fixture mounting plate is slidably connected to the mounting column in the vertical direction and a locking element is arranged between the two, the clamping fixture is arranged on the fixture mounting plate, the clamping fixture can fix the valve block of the electromagnetic valve to be tested in the horizontal direction, the main body lifting platform is arranged on the main body bracket and is located below the clamping fixture, the main body lifting platform can contact the bottom of the electromagnetic valve to be tested and drive the electromagnetic valve to be tested to reciprocate in the vertical direction; A force testing unit, wherein the force testing unit is detachably connected to the main unit, and the force testing unit comprises a lifting platform and a force sensor. When the force testing unit is connected to the main unit, the lifting platform is slidably connected to the main bracket along a vertical direction, the lifting platform is located above the clamping fixture, the lifting platform can be connected to the valve core of the electromagnetic valve to be tested, and the force sensor is arranged between the lifting platform and the valve core of the electromagnetic valve to be tested; A displacement test unit, wherein the displacement test unit is detachably connected to the main unit, and the displacement test unit includes a displacement sensor. When the displacement test unit is connected to the main unit, the displacement sensor is arranged on the main body bracket, and the main body lifting platform drives the valve core of the solenoid valve to be tested to move so as to change the air gap of the solenoid valve to be tested, and the displacement sensor can monitor the valve core displacement of the solenoid valve to be tested.

[0006] Preferably, the force testing unit also includes a compression cover, an upper pull rod and a compression elastic member, the compression cover is located above the lifting platform and the two are connected, the upper pull rod can be slidably passed through the lifting platform and connected to the force sensor, and the compression elastic member is arranged between the compression cover and the upper pull rod to compress the upper pull rod.

[0007] Preferably, the force testing unit also includes a centering adjustment plate, which is located at the top of the lifting platform, and the lifting platform has a through hole allowing the upper pull rod to pass through. The centering adjustment plate has a centering adjustment hole, and the centering adjustment hole is a tapered hole. The upper pull rod includes a pull rod head and a pull rod body, and the pull rod head is located at the top of the pull rod body and the two are connected. The surface of the pull rod head connected to the pull rod body is a spherical surface. The pull rod body is connected to the force sensor after passing through the centering adjustment hole and the through hole of the lifting platform, and the pull rod head extends into the centering adjustment hole, and the spherical surface of the pull rod head contacts the conical surface of the centering adjustment hole.

[0008] Preferably, the clamping elastic member is a spring, and both the pull rod head and the clamping cover have a positioning groove matched with the clamping elastic member.

[0009] Preferably, the pressing cover is connected to the lifting platform by bolts, and the centering adjustment plate abuts against the lifting platform; One end of the force sensor away from the upper pull rod is connected to the electromagnetic valve to be tested by using a lower pull rod and a coupling; The main body lifting platform can contact the bottom of the electromagnetic valve to be tested by using the support column and drive the electromagnetic valve to be tested to reciprocate in the vertical direction.

[0010] Preferably, the displacement testing unit further comprises an air gap adjustment bracket and a sensor mounting bracket, wherein the air gap adjustment bracket is connected to the main lifting platform, the air gap adjustment bracket can contact the solenoid valve to be tested and has a through hole, the displacement sensor is arranged on the sensor mounting bracket, the displacement sensor is a laser displacement sensor, and the sensor mounting bracket can drive the displacement sensor to move in a horizontal plane so that the laser beam emitted by the displacement sensor passes through the through hole of the air gap adjustment bracket and is aligned with the solenoid valve to be tested.

[0011] Preferably, the air gap adjustment bracket includes a connecting frame and a sliding support seat, the connecting frame is bolted to the main lifting platform, and the bolt hole on the connecting frame is a long hole, the sliding support seat is arranged at the top of the connecting frame, and the sliding support seat is slidably connected to the connecting frame, the reciprocating sliding direction of the sliding support seat is parallel to the horizontal plane, and the sliding support seat can contact the solenoid valve to be tested.

[0012] Preferably, the displacement testing unit further comprises an adjustable platform, the adjustable platform is connected to the main body bracket, the sensor mounting bracket is arranged on the adjustable platform, and the adjustable platform can drive the sensor mounting bracket to move in a horizontal plane.

[0013] Preferably, the main body support includes an upper support plate, a lower support plate and a slide rail column, the slide rail column connects the upper support plate and the lower support plate, the lifting platform has a lifting slider adapted to the slide rail column, the lifting slider is slidably connected to the slide rail column, and a fixing element is provided between the two, the fixing element can fix the relative position of the lifting platform and the slide rail column; the mounting column is provided between the upper support plate and the lower support plate.

[0014] Preferably, the upper support plate and the lower support plate both have adjustment slots, the adjustment slots are parallel to the horizontal direction, and the mounting column is connected to the upper support plate and the lower support plate by bolts using the adjustment slots; The mounting column has a dovetail slot, the fixture mounting plate has a dovetail slider matched with the dovetail slot, the dovetail slider is slidably arranged in the dovetail slot, and the locking element can fix the relative position of the mounting column and the fixture mounting plate; The clamping fixture adopts a flat-nose pliers, and the clamping fixture is installed on the clamp installation plate by a clamp pressing block. The clamping fixture can be adjusted by loosening the clamp pressing block.

[0015] Compared with the related art, the present invention has achieved the following technical effects: the solenoid valve test bench of the present invention includes a main body unit, a force testing unit and a displacement testing unit, wherein the main body unit includes a main body bracket, a mounting column, a fixture mounting plate, a clamping fixture and a main body lifting platform, the mounting column is slidably connected to the main body bracket, the sliding direction is parallel to the horizontal direction and the relative positions of the two can be fixed, the fixture mounting plate is slidably connected to the mounting column in the vertical direction and a locking element is arranged between the two, the clamping fixture is arranged on the fixture mounting plate, the clamping fixture can fix the valve block of the solenoid valve to be tested in the horizontal direction, the main body lifting platform is arranged on the main body bracket and is located below the clamping fixture, the main body lifting platform can contact the bottom of the solenoid valve to be tested and drive the solenoid valve to be tested The solenoid valve to be tested reciprocates in the vertical direction; the force testing unit is detachably connected to the main unit, the force testing unit includes a lifting platform and a force sensor, when the force testing unit is connected to the main unit, the lifting platform is slidably connected to the main bracket along the vertical direction, the lifting platform is located above the clamping fixture, the lifting platform can be connected to the valve core of the solenoid valve to be tested, the force sensor is arranged between the lifting platform and the valve core of the solenoid valve to be tested; the displacement testing unit is detachably connected to the main unit, the displacement testing unit includes a displacement sensor, when the displacement testing unit is connected to the main unit, the displacement sensor is arranged on the main bracket, the main lifting platform drives the valve core of the solenoid valve to be tested to move to change the air gap of the solenoid valve to be tested, and the displacement sensor can monitor the displacement of the valve core of the solenoid valve to be tested.

[0016] The solenoid valve test bench of the present invention has a main unit that provides a stable test foundation for the force test unit and the displacement test unit. The force test unit and the displacement test unit are both detachably connected to the main unit, and different test units can be installed according to different test requirements. The relative position of the mounting column and the main bracket can be adjusted. In addition, the relative position of the fixture mounting plate and the mounting column can be adjusted, so that the clamping fixture can be adjusted in space to adapt to different solenoid valves to be tested, thereby improving the flexibility and adaptability of the solenoid valve test bench. When the force test unit is connected to the main unit, the clamping fixture can fix the solenoid valve to be tested, and the lifting platform cooperates with the main lifting platform to drive the valve core of the solenoid valve to be tested to produce a target displacement, and then the electromagnetic force is tested using a force sensor. When the displacement test unit is connected to the main unit, the clamping fixture fixes the solenoid valve to be tested, and the main lifting platform drives the valve core of the solenoid valve to be tested to move and adjust the electromagnetic air gap, and the displacement sensor is used to test the valve core displacement response of the solenoid valve to be tested. The solenoid valve to be tested can also be connected to a load for load testing. The solenoid valve test bench of the present invention can selectively install a force test unit or a displacement test unit to meet different testing requirements while keeping the structure of the main unit unchanged. The various components of the main unit can be adjusted to meet the requirements of solenoid valves to be tested of different specifications, thereby improving the adaptability of the solenoid valve test bench and facilitating improving the testing efficiency of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is an axonometric schematic diagram of a main unit of a solenoid valve test bench disclosed in an embodiment of the present invention being connected to a force test unit; Figure 2 It is a front view schematic diagram of a main unit of the solenoid valve test bench disclosed in an embodiment of the present invention being connected to a force test unit; Figure 3 It is an axonometric schematic diagram of a main unit of a solenoid valve test bench disclosed in an embodiment of the present invention being connected to a displacement test unit; Figure 4 It is a front view schematic diagram of a main unit of the solenoid valve test bench disclosed in an embodiment of the present invention being connected to a displacement test unit; Figure 5 It is a structural schematic diagram of an air gap adjustment bracket of a solenoid valve test bench disclosed in an embodiment of the present invention; Figure 6 It is a structural schematic diagram of the mounting column of the solenoid valve test bench disclosed in the embodiment of the present invention; Figure 7 It is a structural schematic diagram of a lifting platform of a solenoid valve test bench disclosed in an embodiment of the present invention; Figure 8 It is a schematic cross-sectional structure diagram of a centering adjustment plate of a solenoid valve test bench disclosed in an embodiment of the present invention; Fig. 9 It is a schematic diagram of the cross-section structure of the upper pull rod of the solenoid valve test bench disclosed in an embodiment of the present invention.

[0019] In the figure: 100, solenoid valve test bench; 1. Main unit; 101. Main bracket; 102. Mounting column; 103. Fixture mounting plate; 104. Fixture for mounting; 105. Main lifting platform; 106. Upper support plate; 107. Lower support plate; 108. Slide rail column; 109. Lifting slider; 110. Adjustment slot; 111. Fixture pressing block; 2. Force test unit; 201. Lifting platform; 202. Force sensor; 203. Pressing cover; 204. Upper pull rod; 205. Pressing elastic member; 206. Centering adjustment plate; 207. Positioning groove; 208. Support column; 209. Lower pull rod; 210. Coupling; 3. Displacement test unit; 301. Displacement sensor; 302. Air gap adjustment bracket; 303. Sensor mounting bracket; 304. Connecting frame; 305. Sliding support seat; 306. Adjustable platform; 4. Solenoid valve to be tested. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The purpose of the present invention is to provide a solenoid valve test bench to solve the problems existing in the above-mentioned related technologies, improve the adaptability of the solenoid valve test bench, and further improve the test efficiency.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Embodiment 1 This embodiment provides a solenoid valve test bench 100, please refer to Figure 1-Figure 9, including a main unit 1, a force testing unit 2 and a displacement testing unit 3, wherein the main unit 1 includes a main support 101, a mounting column 102, a fixture mounting plate 103, a clamping fixture 104 and a main lifting platform 105, the mounting column 102 is slidably connected to the main support 101, the sliding direction is parallel to the horizontal direction and the relative positions of the two can be fixed, the fixture mounting plate 103 is slidably connected to the mounting column 102 along the vertical direction and a locking element is arranged between the two, the clamping fixture 104 is arranged on the fixture mounting plate 103, the clamping fixture 104 can fix the valve block of the electromagnetic valve 4 to be tested in the horizontal direction, the main lifting platform 105 is arranged on the main support 101 and is located below the clamping fixture 104, the main lifting platform 105 can contact with the bottom of the electromagnetic valve 4 to be tested and drive the electromagnetic valve 4 to be tested to reciprocate in the vertical direction; force testing The test unit 2 is detachably connected to the main unit 1, and the force test unit 2 includes a lifting platform 201 and a force sensor 202. When the force test unit 2 is connected to the main unit 1, the lifting platform 201 is slidably connected to the main support 101 along the vertical direction, and the lifting platform 201 is located above the clamping fixture 104. The lifting platform 201 can be connected to the valve core of the solenoid valve 4 to be tested, and the force sensor 202 is arranged between the lifting platform 201 and the valve core of the solenoid valve 4 to be tested; the displacement test unit 3 is detachably connected to the main unit 1, and the displacement test unit 3 includes a displacement sensor 301. When the displacement test unit 3 is connected to the main unit 1, the displacement sensor 301 is arranged on the main support 101, and the main lifting platform 105 drives the valve core of the solenoid valve 4 to be tested to move to change the air gap of the solenoid valve 4 to be tested, and the displacement sensor 301 can monitor the valve core displacement of the solenoid valve 4 to be tested.

[0024] The solenoid valve test bench 100 of the present invention has a main unit 1 that provides a stable test foundation for the force test unit 2 and the displacement test unit 3. The force test unit 2 and the displacement test unit 3 are both detachably connected to the main unit 1, and different test units can be installed according to different test requirements. The relative position of the mounting column 102 and the main bracket 101 can be adjusted, and the relative position of the fixture mounting plate 103 and the mounting column 102 can be adjusted, so that the mounting fixture 104 can adjust its position in space to adapt to different solenoid valves 4 to be tested, thereby improving the flexibility and adaptability of the solenoid valve test bench 100. When the force test unit 2 is connected to the main unit 1, the mounting fixture 104 can fix the solenoid valve 4 to be tested, and after the lifting platform 201 cooperates with the main lifting platform 105 to drive the valve core of the solenoid valve 4 to be tested to produce a target displacement, the electromagnetic force is tested using the force sensor 202. When the displacement test unit 3 is connected to the main unit 1, the clamping fixture 104 fixes the electromagnetic valve 4 to be tested, and the main lifting platform 105 drives the valve core of the electromagnetic valve 4 to be tested to move and adjust the electromagnetic iron air gap to the rated size. The displacement sensor 301 is used to test the valve core displacement response of the electromagnetic valve 4 to be tested, and the electromagnetic valve 4 to be tested can also be connected to a load for load testing. The electromagnetic valve test bench 100 of the present invention can selectively install the force test unit 2 or the displacement test unit 3 to meet different test requirements while the structure of the main unit 1 remains unchanged, and the various components of the main unit 1 can be adjusted to meet different specifications of the electromagnetic valve 4 to be tested, thereby improving the adaptability of the electromagnetic valve test bench 100 and facilitating the improvement of the electromagnetic valve test efficiency.

[0025] The force testing unit 2 further includes a clamping cover 203, an upper rod 204 and a clamping elastic member 205. The clamping cover 203 is located above the lifting platform 201 and the two are connected. The upper rod 204 can slide through the lifting platform 201 and is connected to the force sensor 202. The clamping elastic member 205 is arranged between the clamping cover 203 and the upper rod 204 to clamp the upper rod 204. The clamping cover 203 and the clamping elastic member 205 are arranged above the upper rod 204, and a pre-tightening force can be applied to the upper rod 204. By adjusting the clamping cover 203, the deformation degree of the clamping elastic member 205 can be adjusted, and then the pre-tightening force applied by the clamping elastic member 205 to the upper rod 204 can be adjusted to ensure that the upper rod 204 is in good contact with the lifting platform 201.

[0026] It should be emphasized that the force test unit 2 also includes a centering adjustment plate 206, which is located at the top of the lifting platform 201. The lifting platform 201 has a through hole that allows the upper pull rod 204 to pass through. The centering adjustment plate 206 has a centering adjustment hole, which is a tapered hole. The upper pull rod 204 includes a pull rod head and a pull rod body. The pull rod head is located at the top of the pull rod body and the two are connected. The surface where the pull rod head is connected to the pull rod body is a spherical surface. After the pull rod body passes through the centering adjustment hole and the through hole of the lifting platform 201, it is connected to the force sensor 202. The pull rod head extends into the centering adjustment hole, and the spherical surface of the pull rod head contacts the conical surface of the centering adjustment hole. The through hole of the lifting platform 201 is larger than the diameter of the centering adjustment hole, and the conical surface of the centering adjustment hole contacts the spherical surface of the pull rod head, so that the two can move relative to each other in any plane, which can effectively prevent the valve core of the electromagnetic valve 4 to be tested from being affected by the radial clamping force, ensure the smooth progress of the test, and improve the test accuracy.

[0027] In this specific embodiment, the clamping elastic member 205 is a spring, which is easy to disassemble and assemble. Springs of different specifications can be replaced according to different testing requirements to meet the clamping requirements. The pull rod head and the clamping cover 203 both have a positioning groove 207 that is compatible with the clamping elastic member 205 to avoid misalignment of the clamping elastic member 205 and ensure the structural stability of the force testing unit 2.

[0028] The clamping gland 203 is connected to the lifting platform 201 by bolts, and the connection is tight and convenient for assembly and disassembly. The centering adjustment plate 206 is located at the top of the lifting platform 201 and the two are in contact. The clamping elastic member 205 presses the upper pull rod 204 on the centering adjustment plate 206 to eliminate the installation gap between the lifting platform 201, the centering adjustment plate 206 and the upper pull rod 204. The spherical surface of the pull rod head of the upper pull rod 204 contacts the conical surface of the centering adjustment hole of the centering adjustment plate 206, so that the centering adjustment plate 206 can move freely relative to the lifting platform 201 within a certain range in the horizontal plane, preventing the upper pull rod 204 from being stuck due to the coaxiality of the valve core of the electromagnetic valve 4 to be tested, and at the same time reducing the clamping accuracy requirements of the electromagnetic valve 4 to be tested.

[0029] It should also be noted that the end of the force sensor 202 away from the upper pull rod 204 is connected to the solenoid valve 4 to be tested by the lower pull rod 209 and the coupling 210 to ensure the stable installation of the force sensor 202 and provide a strong guarantee for the subsequent solenoid valve test.

[0030] In this specific embodiment, the main lifting platform 105 can use the support column 208 to contact the bottom of the solenoid valve 4 to be tested and drive the solenoid valve 4 to be tested to reciprocate in the vertical direction. Whether to use the support column 208 and adjust the specifications of the support column 208 can be selected according to actual needs to adapt to the testing of solenoid valves of different specifications and meet different testing requirements at the same time, thereby further improving the adaptability of the solenoid valve test bench 100.

[0031] Specifically, the displacement test unit 3 further includes an air gap adjustment bracket 302 and a sensor mounting bracket 303. The air gap adjustment bracket 302 is connected to the main lifting platform 105. The air gap adjustment bracket 302 can contact the electromagnetic valve 4 to be tested and has a through hole. The displacement sensor 301 is arranged on the sensor mounting bracket 303. The displacement sensor 301 is a laser displacement sensor. The sensor mounting bracket 303 can drive the displacement sensor 301 to move in the horizontal plane so that the laser beam emitted by the displacement sensor 301 passes through the through hole of the air gap adjustment bracket 302 and is aligned with the electromagnetic valve 4 to be tested. The air gap adjustment bracket 302, the sensor mounting bracket 303 and the displacement sensor 301 are all located below the clamping fixture 104. When testing the displacement of the valve core, the lower end cover of the electromagnetic valve 4 to be tested can be removed so that the valve core of the electromagnetic valve 4 to be tested is against the air gap adjustment bracket 302. The main lifting platform 105 is used to drive the air gap adjustment bracket 302 to move in the vertical direction to adapt to electromagnetic valves 4 to be tested of different specifications. The laser displacement sensor is arranged on the sensor mounting bracket 303. The position of the laser displacement sensor is adjusted so that the laser beam it emits can pass through the through hole of the air gap adjustment bracket 302 and thus directly hit the valve core of the solenoid valve 4 to be tested. Combined with the measuring tool, the valve core displacement response test of the solenoid valve can be realized.

[0032] More specifically, the air gap adjustment bracket 302 includes a connecting bracket 304 and a sliding support seat 305. The connecting bracket 304 is bolted to the main lifting platform 105, and the bolt hole on the connecting bracket 304 is a long hole, which is convenient for adjusting the connection position of the connecting bracket 304 and the main lifting platform 105. The sliding support seat 305 is arranged on the top of the connecting bracket 304, and the sliding support seat 305 is slidably connected to the connecting bracket 304. The reciprocating sliding direction of the sliding support seat 305 is parallel to the horizontal plane, and the sliding support seat 305 can contact the electromagnetic valve 4 to be tested. It should be noted that the adjustment direction of the connecting bracket 304 relative to the main lifting platform 105 is perpendicular to the sliding direction of the sliding support seat 305 relative to the connecting bracket 304, so as to realize the adjustment of the air gap adjustment bracket 302 in the horizontal plane and the vertical plane, so as to meet the testing requirements of electromagnetic valves of different specifications.

[0033] At the same time, the displacement test unit 3 also includes an adjustable platform 306, which is connected to the main bracket 101. The sensor mounting bracket 303 is arranged on the adjustable platform 306. The adjustable platform 306 can drive the sensor mounting bracket 303 to move in the horizontal plane. The adjustable platform 306 drives the sensor mounting bracket 303 and the displacement sensor 301 to move in the horizontal plane, so that the light beam emitted by the laser displacement sensor can face the solenoid valve core on the air gap adjustment bracket 302, thereby ensuring the smooth progress of the test.

[0034] In addition, the main support 101 includes an upper support plate 106, a lower support plate 107 and a slide rail column 108, and the slide rail column 108 connects the upper support plate 106 and the lower support plate 107. The main support 101 adopts a frame structure, which ensures the stability of the test bench and facilitates the disassembly and assembly of the force test unit 2 and the displacement test unit 3. The lifting platform 201 has a lifting slider 109 adapted to the slide rail column 108, and the lifting slider 109 is slidably connected to the slide rail column 108 to improve the position adjustment accuracy of the lifting platform 201. A fixing element is provided between the lifting platform 201 and the slide rail column 108, and the fixing element can fix the relative position of the lifting platform 201 and the slide rail column 108 to ensure the stability of the lifting platform 201 during the test.

[0035] Furthermore, the mounting column 102 is disposed between the upper support plate 106 and the lower support plate 107 to provide stable support for the fixture mounting plate 103 and the clamping fixture 104. The upper support plate 106 and the lower support plate 107 both have an adjustment slot 110, and the adjustment slot 110 is parallel to the horizontal direction. The mounting column 102 is bolted to the upper support plate 106 and the lower support plate 107 by means of the adjustment slot 110. The mounting column 102 can slide along the adjustment slot 110 to adjust its connection position with the upper support plate 106 and the lower support plate 107, thereby adjusting the horizontal position of the fixture mounting plate 103 and the clamping fixture 104. In addition, the fixture mounting plate 103 can drive the clamping fixture 104 to move in the vertical direction, thereby realizing the position adjustment of the clamping fixture 104 in space, so as to adapt to different specifications of the solenoid valves 4 to be tested, and meet different test conditions.

[0036] The electromagnetic valve test bench 100 of the present invention has multiple adjustable components, which greatly improves the flexibility and adaptability of the test bench. It can be used for a variety of electromagnetic valves 4 to be tested and has strong versatility.

[0037] In order to improve the reciprocating motion accuracy of the fixture mounting plate 103, the mounting column 102 has a dovetail groove, and the fixture mounting plate 103 has a dovetail slider matched with the dovetail groove. The dovetail slider is slidably arranged in the dovetail groove, and the locking element can fix the relative position of the mounting column 102 and the fixture mounting plate 103. The dovetail groove and the dovetail slider cooperate to provide a guide for the reciprocating sliding of the fixture mounting plate 103 along the mounting column 102, and at the same time effectively prevent the fixture mounting plate 103 from slipping, thereby improving the structural stability of the fixture mounting plate 103; after the fixture mounting plate 103 slides into place, it is locked using the locking element to provide stable support for subsequent tests.

[0038] In this specific embodiment, the clamp 104 is a flat-nose pliers, and the clamp 104 is mounted on the clamp mounting plate 103 by a clamp pressing block 111. The clamp 111 can be loosened to adjust the clamp 104. In practical applications, other types of clamps 104 can also be used to meet different test requirements.

[0039] Embodiment 2 This embodiment provides an electromagnetic force test method for an electromagnetic valve, using the electromagnetic valve test bench 100 of the first embodiment. During the test, the force test unit 2 is connected to the main unit 1, and the upper pull rod 204, the force sensor 202, the lower pull rod 209, the coupling 210 and the valve core of the electromagnetic valve 4 to be tested are kept coaxial and the axis is substantially perpendicular to the lifting platform 201, ensuring that the centering adjustment plate 206 will not interfere with the lifting platform 201 after the clamping fixture 104 clamps the electromagnetic valve 4 to be tested. Before measuring the electromagnetic force, first keep the clamping fixture 104 in a loose state, so that the solenoid valve 4 to be tested is naturally placed on the support column 208, and the main lifting platform 105 is kept in an intermediate displacement state. At this time, loosen the fixing elements on the four slide rail columns 108, so that the lifting platform 201 can move up and down and drive the valve core of the solenoid valve 4 to be tested to move up and down, adjust its position so that the valve core air gap is zero, and then re-lock the lifting slider 109, continue to keep the clamping fixture 104 in a loose state unchanged, adjust the height of the main lifting platform 105, first raise the main lifting platform 105 to ensure that the tiny air gap that may be generated during the locking of the lifting slider 109 is eliminated, record the vernier scale of the main lifting platform 105 at this time, calculate the required vernier scale position according to the height of the air gap to be measured, and then adjust it to the target scale, clamp the clamping fixture 104 after the adjustment to carry out the electromagnetic force test, when adjusting the electromagnet air gap, you need to first loosen the clamping fixture 104, and then re-clamp the main lifting platform 105 after adjusting it to continue the test.

[0040] Embodiment 3 The present embodiment provides a valve core displacement test method of a solenoid valve, using the solenoid valve test bench 100 of the first embodiment. During the test, the displacement test unit 3 is connected to the main unit 1. After the required accessories are installed, it is necessary to ensure that the components do not interfere with each other. Before measurement, first keep the clamping fixture 104 in a loose state, turn on the laser displacement sensor to generate a light beam, adjust the adjustable platform 306 so that the light beam can pass through the light beam through the hole on the air gap adjustment bracket 302, remove the lower end cover of the solenoid valve and place it naturally on the air gap adjustment bracket 302 to adjust the main body lifting platform 105 to the middle displacement state, then clamp the clamping fixture 104, adjust the main body lifting platform 105 to ensure that the electromagnet air gap is eliminated, and no excessive downward stress is generated on the air gap adjustment bracket 302, record the vernier scale at this time, and then calculate the target scale according to the air gap height to be measured, readjust the vernier to the target scale, and start measuring the valve core displacement response. When load measurement is required, it is only necessary to operate the clamping fixture 104 in the above manner, connect the oil pipe to the valve block of the electromagnetic valve 4 to be tested, and then open the oil source to perform the load test.

[0041] The electromagnetic valve test bench 100 of the present invention can realize electromagnetic force and valve core displacement testing by installing different test units while the structure of the main unit 1 remains unchanged, thereby improving the flexibility and adaptability of the test bench. At the same time, the test bench of the present invention is provided with a plurality of adjustable parts, and the parts are adjusted in multiple directions to adapt to various specifications of electromagnetic valves 4 to be tested or the structural dimensions to be tested, and has strong versatility. The force test unit 2 of the present invention can effectively prevent the generation of lateral clamping force through the cooperation of the lifting platform 201, the centering adjustment plate 206 and the upper pull rod 204, ensure that the direction of the electromagnetic force coincides with the axis of the upper pull rod 204, improve the test accuracy, and at the same time reduce the installation and fixing accuracy requirements of the electromagnetic valve 4 to be tested, thereby improving the convenience of operation of the test bench; at the same time, the force test unit 2 can adjust the preload force by pressing the pressure cover 203 and the pressing elastic member 205, which is used to eliminate the installation gap that may exist between the lifting platform 201, the centering adjustment plate 206 and the upper pull rod 204, ensure good contact, and further improve the test reliability of the test bench. The displacement test unit 3 of the present invention can realize load testing of valve core displacement response and use a laser displacement sensor to achieve higher sampling accuracy and rate.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A solenoid valve test bench, characterized in that: include: A main body unit (1), the main body unit (1) comprising a main body support (101), a mounting column (102), a fixture mounting plate (103), a clamping fixture (104) and a main body lifting platform (105), the mounting column (102) being slidably connected to the main body support (101), the sliding direction being parallel to the horizontal direction and the relative position of the two being able to be fixed, the fixture mounting plate (103) being slidably connected to the mounting column (102) along the vertical direction and the two being able to be fixed relative to each other A locking element is provided, the clamping fixture (104) is provided on the fixture mounting plate (103), the clamping fixture (104) can fix the valve block of the electromagnetic valve (4) to be tested in a horizontal direction, the main body lifting platform (105) is provided on the main body bracket (101) and is located below the clamping fixture (104), the main body lifting platform (105) can contact the bottom of the electromagnetic valve (4) to be tested and drive the electromagnetic valve (4) to be tested to reciprocate in a vertical direction; A force testing unit (2), the force testing unit (2) being detachably connected to the main unit (1), the force testing unit (2) comprising a lifting platform (201) and a force sensor (202), when the force testing unit (2) is connected to the main unit (1), the lifting platform (201) is slidably connected to the main frame (101) in a vertical direction, the lifting platform (201) is located above the clamping fixture (104), the lifting platform (201) can be connected to the valve core of the electromagnetic valve (4) to be tested, and the force sensor (202) is arranged between the lifting platform (201) and the valve core of the electromagnetic valve (4) to be tested; A displacement test unit (3), the displacement test unit (3) being detachably connected to the main unit (1), the displacement test unit (3) comprising a displacement sensor (301), and when the displacement test unit (3) is connected to the main unit (1), the displacement sensor (301) is arranged on the main body bracket (101), the main body lifting platform (105) drives the valve core of the electromagnetic valve (4) to be tested to move so as to change the air gap of the electromagnetic valve (4) to be tested, and the displacement sensor (301) can monitor the displacement of the valve core of the electromagnetic valve (4) to be tested.

2. The solenoid valve test bench according to claim 1, characterized in that: The force testing unit (2) further comprises a clamping cover (203), an upper pull rod (204) and a clamping elastic member (205); the clamping cover (203) is located above the lifting platform (201) and the two are connected; the upper pull rod (204) can slidably pass through the lifting platform (201) and then be connected to the force sensor (202); the clamping elastic member (205) is arranged between the clamping cover (203) and the upper pull rod (204) to clamp the upper pull rod (204).

3. The solenoid valve test bench according to claim 2, characterized in that: The force testing unit (2) further comprises a centering adjustment plate (206), wherein the centering adjustment plate (206) is located at the top of the lifting platform (201), and the lifting platform (201) has a through hole allowing the upper pull rod (204) to pass through, and the centering adjustment plate (206) has a centering adjustment hole, and the centering adjustment hole is a tapered hole. The upper pull rod (204) comprises a pull rod head and a pull rod body, and the pull rod head is located at the top of the pull rod body and the two are connected, and the surface where the pull rod head is connected to the pull rod body is a spherical surface, and the pull rod body passes through the centering adjustment hole and the through hole of the lifting platform (201) and is connected to the force sensor (202), and the pull rod head extends into the centering adjustment hole, and the spherical surface of the pull rod head contacts the tapered surface of the centering adjustment hole.

4. The solenoid valve test bench according to claim 3, characterized in that: The clamping elastic member (205) is a spring, and both the pull rod head and the clamping cover (203) have a positioning groove (207) adapted to the clamping elastic member (205).

5. The solenoid valve test bench according to claim 3, characterized in that: The pressing cover (203) is connected to the lifting platform (201) by means of bolts, and the centering adjustment plate (206) is in contact with the lifting platform (201); One end of the force sensor (202) away from the upper pull rod (204) is connected to the electromagnetic valve (4) to be tested by means of a lower pull rod (209) and a coupling (210); The main body lifting platform (105) can utilize the support column (208) to contact the bottom of the electromagnetic valve (4) to be tested and drive the electromagnetic valve (4) to be tested to reciprocate in a vertical direction.

6. The solenoid valve test bench according to claim 1, characterized in that: The displacement test unit (3) further comprises an air gap adjustment bracket (302) and a sensor mounting bracket (303); the air gap adjustment bracket (302) is connected to the main lifting platform (105); the air gap adjustment bracket (302) is capable of contacting the electromagnetic valve (4) to be tested and has a through hole; the displacement sensor (301) is arranged on the sensor mounting bracket (303); the displacement sensor (301) is a laser displacement sensor (301); and the sensor mounting bracket (303) is capable of driving the displacement sensor (301) to move in a horizontal plane so that a laser beam emitted by the displacement sensor (301) passes through the through hole of the air gap adjustment bracket (302) and is aligned with the electromagnetic valve (4) to be tested.

7. The solenoid valve test bench according to claim 6, characterized in that: The air gap adjustment bracket (302) comprises a connecting frame (304) and a sliding support seat (305); the connecting frame (304) is bolted to the main lifting platform (105), and the bolt hole on the connecting frame (304) is a long hole; the sliding support seat (305) is arranged on the top of the connecting frame (304), and the sliding support seat (305) is slidably connected to the connecting frame (304); the reciprocating sliding direction of the sliding support seat (305) is parallel to the horizontal plane, and the sliding support seat (305) can contact the solenoid valve (4) to be tested.

8. The solenoid valve test bench according to claim 6, characterized in that: The displacement testing unit (3) further comprises an adjustable platform (306), wherein the adjustable platform (306) is connected to the main body support (101), and the sensor mounting support (303) is arranged on the adjustable platform (306), and the adjustable platform (306) can drive the sensor mounting support (303) to move in a horizontal plane.

9. The solenoid valve test bench according to claim 1, characterized in that: The main support (101) includes an upper support plate (106), a lower support plate (107) and a slide rail column (108); the slide rail column (108) is connected to the upper support plate (106) and the lower support plate (107); the lifting platform (201) has a lifting slider (109) adapted to the slide rail column (108); the lifting slider (109) is slidably connected to the slide rail column (108), and a fixing element is provided between the two, and the fixing element can fix the relative position of the lifting platform (201) and the slide rail column (108); the mounting column (102) is provided between the upper support plate (106) and the lower support plate (107).

10. The solenoid valve test bench according to claim 9, characterized in that: The upper support plate (106) and the lower support plate (107) both have an adjustment slot (110), the adjustment slot (110) is parallel to the horizontal direction, and the mounting column (102) is bolted to the upper support plate (106) and the lower support plate (107) using the adjustment slot (110); The mounting column (102) has a dovetail slot, the fixture mounting plate (103) has a dovetail slider matched with the dovetail slot, the dovetail slider is slidably arranged in the dovetail slot, and the locking element is capable of fixing the relative position of the mounting column (102) and the fixture mounting plate (103); The clamping fixture (104) is a flat-nose pliers, and the clamping fixture (104) is mounted on the clamp mounting plate (103) by means of a clamp pressing block (111). The clamping fixture (104) can be adjusted by loosening the clamp pressing block (111).

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