A solenoid valve stroke setting test system and stroke setting test method

Abstract

The present invention relates to a solenoid valve stroke setting test system, comprising a base, a pressure output device, a pressure rod, a pressure head, a tooling seat, a support seat, a first driving cylinder and a displacement detection component, wherein the pressure output device is connected to the pressure rod, the pressure head is slidably sleeved on the pressure rod through a first through hole, a coil is connected in the first through hole, and the tooling seat places the solenoid valve; the present invention also includes a stroke setting test method, wherein the solenoid valve is first fixed to the tooling seat by the pressure head, the lower end surface of the pressure rod is in contact with the upper end surface of the upper valve core, the coil is electrically connected to the upper valve core, and then the first driving cylinder is used to drive the displacement detection component to move upward, and the displacement detected when the displacement detection component is against the lower valve core is recorded as X1, and the displacement when the first driving cylinder drives the displacement detection component to move upward with the lower valve core after the coil is energized is recorded as X2, and then the pressure rod moves downward X2-X1-X; so as to solve the technical problem in the prior art that the solenoid valve response speed is affected by the poor consistency of the solenoid valve stroke, thereby affecting the working ability of the solenoid valve.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valve testing equipment, and in particular to a solenoid valve stroke setting testing system and a stroke setting testing method. Background Art

[0002] A solenoid valve is a type of industrial equipment controlled by electromagnetic force. It generally consists of a valve body, an upper valve core, a lower valve core, and a spring. The upper valve core has an interference fit with the valve body and is located at the top, while the lower valve core slides with the valve body and is located at the bottom. A spring is installed within the valve body as a reset mechanism for the lower valve core. The stroke of a solenoid valve is the distance the lower valve core travels when the solenoid valve is energized, moving toward the upper valve core to activate the valve core. Industry has high requirements for the stroke of solenoid valves. Poor stroke consistency will affect the solenoid valve's response speed and ultimately its operating capacity. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the first purpose of the present invention is to provide a stroke setting test system that can detect and set the stroke of the solenoid valve, thereby improving the consistency of the solenoid valve stroke, in order to solve the technical problem in the existing technology that the poor consistency of the solenoid valve stroke affects the response speed of the solenoid valve and thus affects the working ability of the solenoid valve.

[0004] In order to solve the above technical problems, the present invention provides a solenoid valve stroke setting test system, including a base, a pressure output device, a pressure rod, a pressure head, a tooling seat, a support seat, a first driving cylinder and a displacement detection component, the tooling seat is connected to the middle part of the base, the pressure output device is connected to the base and is located above the tooling seat, the pressure output device is connected to the pressure rod and the pressure output device controls the vertical movement of the pressure rod, a first through hole is provided on the pressure head along the axial direction, the pressure head is slidably sleeved on the pressure rod through the first through hole, a coil is connected to the inner wall of the first through hole, the coil is located below the pressure rod, an elastic component is connected between the pressure head and the pressure output device, the support seat is connected to the lower end surface of the tooling seat, the first driving cylinder is connected to the support seat, the first driving cylinder The piston rod is set upward and connected to the displacement detection component. The solenoid valve to be tested is placed on the tooling seat. The solenoid valve includes a valve body, an upper valve core, a lower valve core and a first spring. The upper valve core is located above the lower valve core. The upper valve core and the valve body have an interference fit. The lower valve core is slidingly connected to the valve body. The first spring is connected between the upper valve core and the lower valve core. The pressure rod, pressure head, valve body, upper valve core, lower valve core and displacement detection component are coaxially arranged. When the pressure output device drives the pressure rod and the pressure head downward, the upper valve core enters the first through hole and is electrically connected to the coil. The pressure output device and the elastic component enable the pressure head to fix the valve body and the tooling seat. The pressure output device can move the upper valve core downward through the pressure rod, and the first driving cylinder drives the displacement detection component to offset the lower valve core.

[0005] After adopting the above structure, a solenoid valve stroke setting test system in the present invention has the following advantages: the valve body and the tooling seat are fixed by the pressure head to prevent the solenoid valve from moving during the test. When setting the test, the displacement detection component is first offset against the lower valve core, and the coil is energized to make the valve core of the solenoid valve move, the lower valve core moves upward, and the displacement detection component moves upward accordingly. The current stroke of the solenoid valve is tested according to the displacement change of the displacement detection component. At this time, the pressure rod continues to move downward to make the upper valve core move downward, and the moving distance is the difference between the current stroke of the solenoid valve and the qualified stroke. The above action is repeated until the current stroke of the solenoid valve meets the qualified stroke. In this way, the stroke of the solenoid valve can be the same or similar, and the poor consistency of the solenoid valve stroke caused by part deviation and assembly deviation can be avoided, thereby improving the consistency of the solenoid valve stroke and facilitating the quality management and safety monitoring of the solenoid valve products.

[0006] As an improvement, a second through hole is vertically provided on the upper edge of the work seat, the valve body is coaxially arranged with the second through hole and the lower valve core is located in the second through hole, the displacement detection assembly includes a displacement sensor and a measuring needle, the measuring needle is slidably connected in the second through hole, a horizontally arranged limit pin is connected in the second through hole, a stroke groove is provided on the outer wall of the measuring needle, the limit pin is located on the moving path of the upper and lower end surfaces of the stroke groove, the measuring needle and the lower valve core are coaxially arranged, the piston rod of the first driving cylinder is connected to the displacement sensor, when the first driving cylinder drives the displacement sensor to move upward, the displacement sensor drives the measuring needle to move upward and resists against the lower valve core through the measuring needle; with this structure, the measuring needle is used as an intermediate medium for measuring the stroke of the solenoid valve by resisting against the lower valve core, and the measuring needle slides upward and is self-repositioned. By setting the stroke groove and the limit pin, the sliding stroke of the measuring needle in the second through hole is limited, and the measuring needle can also be prevented from falling out of the second through hole.

[0007] As an improvement, the support base includes a first support plate, a second support plate, a connecting base and several guide pillars, the several guide pillars are vertically connected to the lower end surface of the tooling base, the first support plate is slidably connected to the several guide pillars, the connecting base is connected to the first support plate and is located below the first support plate, the second support plate is connected to the lower ends of the several guide pillars, the first drive cylinder is connected to the second support plate, the displacement sensor is connected to the first support plate, and the connecting base is connected to the piston rod of the first drive cylinder; with this structure, the guide pillars play a guiding role, so that the movement of the displacement sensor is more stable and accurate.

[0008] As an improvement, the pressure output device includes a second driving cylinder, a first connecting block and a second connecting block, the elastic component includes a second spring, the second driving cylinder is connected to the base, the second connecting block is connected to the second driving cylinder piston rod through the first connecting block, the pressure rod is connected to the second connecting block, the second spring is sleeved on the pressure rod, the upper end of the second spring is connected to the bottom end of the second connecting block, and the lower end of the second spring is connected to the upper end of the pressure head; with this structure, the pressure rod is against the upper valve core, and the second spring is compressed when the pressure head presses on the valve body, and the valve body is pressed tightly against the workpiece seat by the elastic force of the second spring.

[0009] As an improvement, a limit groove is provided vertically on the outer peripheral wall of the pressure rod, and a screw is connected to the upper radial thread of the pressure head, with one end of the screw located in the limit groove; with this structure, the pressure head is limited by the limit groove and the screw to prevent the pressure head from separating from the pressure rod.

[0010] As an improvement, the base is connected to a vertical plate, the vertical plate is connected to a slide rail, the second connecting block is connected to a slider, and the slider is slidably connected to the slide rail; with this structure, the slide rail and the slider play a guiding role, making the movement of the pressure rod and the pressure head more stable and accurate.

[0011] A second object of the present invention is to provide a stroke setting test method, which uses a solenoid valve stroke setting test system as described in the claims, comprising the following steps:

[0012] S1, place the solenoid valve to be tested on the workbench;

[0013] S2: The pressure output device drives the pressure rod and the pressure head downward, causing the pressure head to fix the solenoid valve to the fixture. The lower end surface of the pressure rod abuts against the upper end surface of the upper valve core. The upper valve core of the solenoid valve is located in the first through hole, and the coil is electrically connected to the upper valve core.

[0014] S3, the first driving cylinder drives the displacement detection assembly to move upward, and the displacement value detected when the displacement detection assembly abuts against the lower valve core of the solenoid valve is recorded as X1;

[0015] S4. The coil is energized to drive the lower valve core upward, causing the first drive cylinder to drive the displacement detection component to move upward along with the lower valve core. The displacement value detected by the displacement detection component is recorded as X2. The current stroke of the solenoid valve is X3 = X2-X1. If X3 is less than X, the solenoid valve is scrapped. If X3 is greater than X, the process proceeds to step S5, and X is the qualified stroke value.

[0016] S5. The first driving cylinder and the displacement detection assembly are reset, the pressure output device drives the pressure rod downward and the downward distance is X4 = X3-X, and the coil is de-energized;

[0017] S6. Repeat steps S3 to S5 until X3 meets X. The solenoid valve is qualified. If X3 still does not meet X after N repetitions, the solenoid valve is scrapped.

[0018] After adopting the above method, a stroke setting test method in the present invention has the following advantages: the current stroke X3 of the solenoid valve is tested according to the displacement change X2-X1 of the displacement detection component. At this time, the pressure rod continues to move downward to make the upper valve core move downward, and the moving distance is the difference X4 between the current stroke X3 of the solenoid valve and the qualified stroke X. The above action is repeated until the current stroke of the solenoid valve meets the qualified stroke. If X3 still does not meet X after repeated many times, or X3 is less than X in a certain test, the solenoid valve is unqualified. In this way, the stroke of the solenoid valve can be made the same or similar, and the poor consistency of the solenoid valve stroke caused by part deviation and assembly deviation can be avoided, thereby improving the consistency of the solenoid valve stroke and facilitating the quality management and safety monitoring of the solenoid valve product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure in embodiment 1 of the present invention.

[0020] Figure 2 for Figure 1 A partial enlarged view of part A in the middle.

[0021] Figure 3 It is a cross-sectional view of the entire embodiment 1 of the present invention.

[0022] Figure 4 for Figure 3 A partial enlarged view of part B in the middle.

[0023] Figure 5 This is a cross-sectional view of the solenoid valve, tooling seat and measuring probe in Example 1 of the present invention.

[0024] Figure markings: 100, solenoid valve; 101, valve body; 102, upper valve core; 103, lower valve core; 104, first spring; 1, base; 2, pressure output device; 21, second drive cylinder; 22, first connecting block; 23, second connecting block; 3, pressure rod; 4, pressure head; 40, first through hole; 5, tooling seat; 50, second through hole; 6, support seat; 61, first support plate; 62, second support plate; 63, connecting seat; 64, guide column; 7, first drive cylinder; 8, displacement detection assembly; 81, displacement sensor; 82, measuring needle; 9, coil; 10, limit pin; 11, travel groove; 12, second spring; 13, limit groove; 14, screw; 15, vertical plate; 16, slide rail; 17, slider. DETAILED DESCRIPTION

[0025] The following describes in detail a solenoid valve stroke setting test system and a stroke setting test method of the present invention in conjunction with the accompanying drawings.

[0026] Example 1:

[0027] like Figures 1 to 5 As shown, in this embodiment, a solenoid valve stroke setting test system is provided, including a base 1, a pressure output device 2, a pressure rod 3, a pressure head 4, a tooling seat 5, a support seat 6, a first driving cylinder 7 and a displacement detection component 8. The tooling seat 5 is connected to the middle part of the base 1, and a solenoid valve 100 to be tested is placed on the tooling seat 5. The solenoid valve 100 includes a valve body 101, an upper valve core 102, a lower valve core 103 and a first spring 104. The upper valve core 102 is located above the lower valve core 103, and the upper valve core 102 and the valve body 101 have an interference fit. The lower valve core 103 is slidably connected to the valve body 101, and the first spring 104 is connected between the upper valve core 102 and the lower valve core 103. The upper valve core 102 and the lower valve core 103 are both in the valve body 101. The first spring 104 is used to reset the lower valve core 103. The specific structure of the solenoid valve 100 is the existing technology and will not be repeated here. Figure 4 As shown, a second through hole 50 is vertically provided on the tooling seat 5 , the valve body 101 is placed on the tooling seat 5 , and the valve body 101 is coaxially arranged with the second through hole 50 , and the lower part of the lower valve core 103 is located in the second through hole 50 .

[0028] like Figure 1 and Figure 2As shown, the pressure output device 2 is connected to the base 1 and is located above the tooling seat 5. The pressure output device 2 is connected to a pressure rod 3 and the pressure output device 2 controls the vertical movement of the pressure rod 3. A first through hole 40 is axially provided on the pressure head 4, that is, a vertically arranged first through hole 40. The pressure head 4 is slidably sleeved on the pressure rod 3 through the first through hole 40, and a limiting groove 13 is vertically provided on the outer peripheral wall of the pressure rod 3. A screw 14 is radially threadedly connected to the pressure head 4, and one end of the screw 14 is located in the limiting groove 13; in this embodiment, two left and right limiting grooves 13 are provided on the outer peripheral wall of the pressure rod 3, and correspondingly, two left and right screws 14 are also provided on the pressure head 4, the right end of the left screw 14 is located in the limiting groove 13 on the left, and the left end of the right screw 14 is located in the limiting groove 13 on the right; the inner wall of the first through hole 40 is connected to a coil 9, and the coil 9 is located at the lower end of the inner wall of the first through hole 40. The coil 9 is located at the pressure Below the rod 3, an elastic component is connected between the pressure head 4 and the pressure output device 2; wherein the pressure output device 2 includes a second driving cylinder 21, a first connecting block 22 and a second connecting block 23, the elastic component includes a second spring 12, the second driving cylinder 21 is connected to the base 1, and the second connecting block 23 is connected to the piston rod of the second driving cylinder 21 through the first connecting block 22, that is, the upper end of the first connecting block 22 is connected to the piston rod of the second driving cylinder 21, the second connecting block 23 is connected to the lower end of the first connecting block 22, and the pressure rod 3 is connected to the second connecting block 23, the second spring 12 is sleeved on the pressure rod 3, the upper end of the second spring 12 is connected to the bottom end of the second connecting block 23, and the lower end of the second spring 12 is connected to the upper end of the pressure head 4; a vertical plate 15 is also connected to the base 1, a slide rail 16 is connected to the vertical plate 15, a slider 17 is connected to the second connecting block 23, and the slider 17 is slidably connected to the slide rail 16.

[0029] like Figure 1 、 Figure 3 and Figure 4 As shown, the support seat 6 is connected to the lower end surface of the tooling seat 5, the first driving cylinder 7 is connected to the support seat 6, and the piston rod of the first driving cylinder 7 is arranged upward and connected to the displacement detection component 8; wherein, the support seat 6 includes a first support plate 61, a second support plate 62, a connecting seat 63 and a plurality of guide pillars 64, and the plurality of guide pillars 64 are vertically connected to the lower end surface of the tooling seat 5, the first support plate 61 is slidably connected to the plurality of guide pillars 64, the connecting seat 63 is connected to the first support plate 61 and is located below the first support plate 61, the second support plate 62 is connected to the lower end of the plurality of guide pillars 64, the first driving cylinder 7 is connected to the second support plate 62, and the connecting seat 63 is connected to the piston rod of the first driving cylinder 7; the displacement detection component 8 includes a displacement sensor 81 and a measuring needle 82, and the measuring needle 82 is slidably connected in the second through hole 50, as shown Figure 5As shown, a horizontally arranged limit pin 10 is connected to the second through hole 50, and a stroke groove 11 is provided on the outer wall of the measuring needle 82. The limit pin 10 is located on the moving path of the upper and lower end surfaces of the stroke groove 11. The measuring needle 82 is self-repositioned, so when the measuring needle 82 is not subjected to external force, the limit pin 10 is in contact with the upper end surface of the stroke groove 11; the measuring needle 82 is coaxially arranged with the lower valve core 103, and the piston rod of the first driving cylinder 7 is connected to the displacement sensor 81, and the displacement sensor 81 is connected to the first support plate 61, that is, the piston rod of the first driving cylinder 7 is connected to the displacement sensor 81 through the connecting seat 63 and the first support plate 61. When the first driving cylinder 7 drives the displacement sensor 81 to move upward, the displacement sensor 81 drives the measuring needle 82 to move upward and resists the lower valve core 103 through the measuring needle 82.

[0030] The pressure rod 3, the pressure head 4, the valve body 101, the upper valve core 102, the lower valve core 103 and the displacement detection component 8 are all coaxially arranged, and the outer diameter of the upper valve core 102 is smaller than the inner diameter of the first through hole 40, and the inner diameter of the first through hole 40 is smaller than the outer diameter of the valve body 101. When the pressure output device 2 drives the pressure rod 3 and the pressure head 4 downward, the upper valve core 102 enters the first through hole 40 and is electrically connected to the coil 9. In the initial state, the coil 9 is not energized, and when the bottom end of the pressure head 4 just contacts the upper end surface of the valve body 101, the bottom surface of the pressure rod 3 Before contacting the upper valve core 102, the pressure rod 3 continues to move downward until the bottom end of the pressure rod 3 contacts the upper valve core 102. At this time, the second spring 12 is compressed, and the elastic force of the second spring 12 causes the pressure head 4 to press the valve body 101 tightly against the tooling seat 5, that is, the pressure output device 2 and the elastic component cause the pressure head 4 to fix the valve body 101 and the tooling seat 5; then, the first driving cylinder 7 drives the displacement detection component 8 upward, and the first driving cylinder 7 first drives the displacement sensor 81 upward, and the displacement sensor 81 moves upward to contact the measuring needle. After the contact, the measuring needle 82 is driven to move upward until the upper end of the measuring needle 82 is against the bottom end of the lower valve core 103, and the value of the displacement sensor 81 at this time is recorded; at this time, the coil 9 is energized, so that the valve core of the solenoid valve 100 is actuated, and the lower valve core 103 moves upward, and then the first driving cylinder 7 continues to drive the displacement sensor 81 and the measuring needle 82 to move upward, and the value of the displacement sensor 81 is recorded again and the value change of the displacement sensor 81 is calculated, which is the current stroke value of the solenoid valve 100. The difference between the stroke value and the qualified stroke value is calculated, and the pressure output device 2 is used to move the upper valve core 102 downward through the pressure rod 3 by the displacement of the difference between the current stroke value and the qualified stroke value, thereby adjusting the stroke value of the solenoid valve 100. In this way, the stroke of the solenoid valve 100 can be the same or similar, which can avoid the poor consistency of the stroke of the solenoid valve 100 caused by part deviation and assembly deviation, thereby improving the consistency of the stroke of the solenoid valve 100 and facilitating the quality management and safety monitoring of the solenoid valve 100 product.

[0031] Example 2:

[0032] This embodiment provides a stroke setting test method, which uses a solenoid valve stroke setting test system in the first embodiment, including the following steps:

[0033] S1, placing the solenoid valve 100 to be tested on the tooling seat 5;

[0034] S2: The pressure output device 2 drives the pressure rod 3 and the pressure head 4 downward, causing the pressure head 4 to fix the solenoid valve 100 to the fixture 5. The lower end surface of the pressure rod 3 abuts against the upper end surface of the upper valve core 102. The upper valve core 102 of the solenoid valve 100 is located in the first through hole 40, and the coil 9 is electrically connected to the upper valve core 102.

[0035] S3, the first driving cylinder 7 drives the displacement detection component 8 to move upward, and the displacement value detected when the displacement detection component 8 abuts against the lower valve core 103 of the solenoid valve 100 is recorded as X1;

[0036] S4. The coil 9 is energized to drive the lower valve core 103 upward, so that the first driving cylinder 7 drives the displacement detection component 8 to move upward along with the lower valve core 103. At this time, the displacement value detected by the displacement detection component 8 is recorded as X2. The current stroke of the solenoid valve 100 is X3 = X2-X1. If X3 is less than X, the solenoid valve 100 is scrapped. If X3 is greater than X, the process proceeds to step S5, and X is the qualified stroke value.

[0037] S5. The first driving cylinder 7 and the displacement detection assembly 8 are reset, the pressure output device 2 drives the pressure rod 3 downward, and the downward distance is X4 = X3-X, and the coil 9 is de-energized;

[0038] S6. Repeat steps S3 to S5 until X3 meets X. The solenoid valve 100 is qualified. If X3 still does not meet X after repeating N times, the solenoid valve 100 is scrapped.

[0039] In this embodiment, X is 0.257 mm, and N is three times. In step S3, the first driving cylinder 7 first drives the displacement sensor 81 upward. After the displacement sensor 81 moves upward and contacts the measuring needle 82, it drives the measuring needle 82 upward together until the upper end of the measuring needle 82 contacts the bottom end of the lower valve core 103. At this time, the value of the displacement sensor 81 is recorded as X1. In step S6, when X3 obtained after repeating steps S3 to S5 three times still does not meet 0.257 mm, the solenoid valve 100 is scrapped.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above two embodiments. All other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A solenoid valve stroke setting test system, characterized in that: The invention comprises a base (1), a pressure output device (2), a pressure rod (3), a pressure head (4), a tooling seat (5), a support seat (6), a first driving cylinder (7) and a displacement detection assembly (8), wherein the tooling seat (5) is connected to the middle of the base (1), the pressure output device (2) is connected to the base (1) and is located above the tooling seat (5), the pressure output device (2) is connected to the pressure rod (3) and the pressure output device (2) controls the vertical movement of the pressure rod (3), the pressure head (4) is provided with a first through hole (40) along the axial direction, and the pressure head (4) is moved through the first through hole (40) The through hole (40) is slidably sleeved on the pressure rod (3), the inner wall of the first through hole (40) is connected to a coil (9), and the coil (9) is located below the pressure rod (3). An elastic component is connected between the pressure head (4) and the pressure output device (2), the support seat (6) is connected to the lower end surface of the tooling seat (5), the first driving cylinder (7) is connected to the support seat (6), the piston rod of the first driving cylinder (7) is set upward and connected to the displacement detection component (8), and a solenoid valve (100) to be tested is placed on the tooling seat (5), and the solenoid valve (100) The invention comprises a valve body (101), an upper valve core (102), a lower valve core (103) and a first spring (104), wherein the upper valve core (102) is located above the lower valve core (103), the upper valve core (102) and the valve body (101) are interference fit, the lower valve core (103) is slidably connected to the valve body (101), the first spring (104) is connected between the upper valve core (102) and the lower valve core (103), the pressure rod (3), the pressure head (4), the valve body (101), the upper valve core (102), the lower valve core (103) and the displacement detection device. The pressure output device (2) and the pressure head (4) are coaxially arranged. When the pressure output device (2) drives the pressure rod (3) and the pressure head (4) downward, the upper valve core (102) enters the first through hole (40) and is electrically connected to the coil (9). The pressure output device (2) and the elastic component enable the pressure head (4) to fix the valve body (101) and the tooling seat (5). The pressure output device (2) can move the upper valve core (102) downward through the pressure rod (3). The first driving cylinder (7) drives the displacement detection component (8) to abut against the lower valve core (103). A second through hole (50) is vertically provided on the tooling seat (5), the valve body (101) is coaxially arranged with the second through hole (50), and the lower valve core (103) is located in the second through hole (50), the displacement detection assembly (8) comprises a displacement sensor (81) and a measuring pin (82), the measuring pin (82) is slidably connected in the second through hole (50), a horizontally arranged limit pin (10) is connected in the second through hole (50), and a travel stop is provided on the outer wall of the measuring pin (82). The travel groove (11) is provided with a limit pin (10), the limit pin (10) is located on the moving path of the upper and lower end surfaces of the travel groove (11), the measuring needle (82) is coaxially arranged with the lower valve core (103), the piston rod of the first driving cylinder (7) is connected to the displacement sensor (81), and when the first driving cylinder (7) drives the displacement sensor (81) to move upward, the displacement sensor (81) drives the measuring needle (82) to move upward and abuts against the lower valve core (103) through the measuring needle (82); The pressure output device (2) includes a second driving cylinder (21), a first connecting block (22) and a second connecting block (23), the elastic component includes a second spring (12), the second driving cylinder (21) is connected to the base (1), the second connecting block (23) is connected to the piston rod of the second driving cylinder (21) through the first connecting block (22), the pressure rod (3) is connected to the second connecting block (23), the second spring (12) is sleeved on the pressure rod (3), the upper end of the second spring (12) is connected to the bottom end of the second connecting block (23), and the lower end of the second spring (12) is connected to the upper end of the pressure head (4).

2. A solenoid valve stroke setting test system according to claim 1, characterized in that: The support base (6) includes a first support plate (61), a second support plate (62), a connecting base (63) and a plurality of guide pillars (64), wherein the plurality of guide pillars (64) are vertically connected to the lower end surface of the tooling base (5), the first support plate (61) is slidably connected to the plurality of guide pillars (64), the connecting base (63) is connected to the first support plate (61) and is located below the first support plate (61), the second support plate (62) is connected to the lower ends of the plurality of guide pillars (64), the first driving cylinder (7) is connected to the second support plate (62), the displacement sensor (81) is connected to the first support plate (61), and the connecting base (63) is connected to the piston rod of the first driving cylinder (7).

3. The solenoid valve stroke setting test system according to claim 1, characterized in that: A limiting groove (13) is vertically provided on the outer peripheral wall of the pressure rod (3), and a screw rod (14) is radially threadedly connected to the pressure head (4), with one end of the screw rod (14) located in the limiting groove (13).

4. The solenoid valve stroke setting test system according to claim 1, characterized in that: The base (1) is connected to a vertical plate (15), the vertical plate (15) is connected to a slide rail (16), the second connecting block (23) is connected to a slider (17), and the slider (17) is slidably connected to the slide rail (16).

5. A stroke setting test method, characterized in that: A solenoid valve stroke setting test system according to any one of claims 1 to 4 is used, comprising the following steps: S1, placing the solenoid valve (100) to be tested on the tooling seat (5); S2, the pressure output device (2) drives the pressure rod (3) and the pressure head (4) downward and causes the pressure head (4) to fix the solenoid valve (100) to the tooling seat (5), the lower end surface of the pressure rod (3) is in contact with the upper end surface of the upper valve core (102), the upper valve core (102) of the solenoid valve (100) is located in the first through hole (40), and the coil (9) is electrically connected to the upper valve core (102); S3, the first driving cylinder (7) drives the displacement detection component (8) to move upward, and the displacement value detected when the displacement detection component (8) and the lower valve core (103) of the electromagnetic valve (100) collide with each other is recorded as X1; S4, the coil (9) is energized to drive the lower valve core (103) upward, so that the first driving cylinder (7) drives the displacement detection component (8) to move upward along with the lower valve core (103). At this time, the displacement value detected by the displacement detection component (8) is recorded as X2, and the current stroke of the solenoid valve (100) is X3=X2-X1. If X3 is less than X, the solenoid valve (100) is scrapped. If X3 is greater than X, the process proceeds to step S5, and X is the qualified stroke value. S5, the first driving cylinder (7) and the displacement detection assembly (8) are reset, the pressure output device (2) drives the pressure rod (3) downward and the downward distance is X4=X3-X, and the coil (9) is de-energized; S6. Repeat steps S3 to S5 until X3 satisfies X, and the solenoid valve (100) is qualified. If X3 still does not satisfy X after repeating N times, the solenoid valve (100) is scrapped.

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