Electromagnetic valve gasket selection device and method

Abstract

The application discloses a kind of electromagnetic valve gasket selection device and method, it is related to electromagnetic valve gasket selection technical field, including base and measurement component, the top of the base is equipped with positioning groove, the measurement component includes measurement pressure head, force sensor, displacement sensor and data processing and calculation module.By measurement pressure head to the electromagnetic valve to be measured after taking down main valve seat is pressed down, cooperate force sensor and displacement sensor synchronous acquisition press-down force value and press-down displacement value, and then generate force-displacement curve to identify inflection point, to accurately calculate the height difference L1 of the main valve core end surface of the electromagnetic valve to be measured relative to shell main body end surface, then obtain the main valve seat protruding height L2 of the electromagnetic valve to be measured by separate measurement and carry out difference calculation with height difference L1, record ΔL=L1-L2, finally according to the numerical range of ΔL Select corresponding thickness main-stage gasket, complete the non-destructive measurement of key dimension required for main-stage gasket selection of electromagnetic valve to be measured, realize the efficient and accurate selection of main-stage gasket.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve gasket selection technology, and in particular to a solenoid valve gasket selection device and method. Background Technology

[0002] As a key actuator in industrial automation control systems, the assembly precision of solenoid valves directly determines the valve core stroke, sealing performance, and response characteristics. During the assembly process, the selection of the main stage gasket thickness is crucial for ensuring proper fit between the main valve core and the main valve seat, and for guaranteeing appropriate preload force for both the main stage soft spring and the main stage hard spring. If the main stage gasket is too thin, it will result in insufficient valve core stroke and poor sealing; if it is too thick, it may cause excessive spring compression, preventing the electromagnetic force from driving the valve core to operate normally.

[0003] In existing technologies, laser rangefinders are typically used to non-contactly measure the height difference between the main valve seat and the main valve core, and the thickness of the main stage gasket is selected accordingly. However, the aforementioned non-contact measurement method cannot simulate the actual working conditions of the solenoid valve, and it is difficult to reflect the spring preload and valve core fit under actual assembly conditions, resulting in poor overall performance of the assembled solenoid valve. Summary of the Invention

[0004] The purpose of this invention is to provide a solenoid valve gasket selection device and method to solve the above-mentioned technical problems.

[0005] Specifically, the present invention provides the following technical solution: a solenoid valve gasket selection device, comprising: a base, the top of which is provided with a positioning groove for positioning and installing the solenoid valve to be tested; and a calculation component, the calculation component including a measuring head, a force sensor, a displacement sensor, and a data processing and calculation module; wherein, the measuring head can be linearly displaced relative to the base and directly act on the solenoid valve to be tested; the force sensor and the displacement sensor are used to collect the downward pressure value and downward displacement value when the measuring head acts on the solenoid valve to be tested, respectively; the data processing and calculation module is signal-connected to the force sensor and the displacement sensor, and is used to generate a force-displacement curve according to the collected downward pressure value and downward displacement value, determine the height difference L1 between the main valve core end face of the solenoid valve to be tested and the main body end face of the outer shell based on the force-displacement curve, calculate the difference between the height difference L1 and the main valve seat protrusion height L2 of the solenoid valve to be tested, and select a main stage gasket of appropriate thickness based on the result of the difference calculation.

[0006] In a preferred embodiment of the solenoid valve gasket selection device of the present invention, the measuring head includes a sleeve; the sleeve is provided with a mounting groove for positioning and mounting the force sensor; one end of the sleeve facing the base is provided with a shaft hole communicating with the mounting groove, and a pressure rod is provided in the shaft hole; the pressure rod is axially displaceable relative to the shaft hole, one end of the pressure rod is always abutting against the force-receiving end of the force sensor, and the other end can extend outside the sleeve and contact and separate from the main valve core end face of the solenoid valve to be tested; the end of the sleeve facing the base has a base surface, and the base surface can contact and separate from the outer shell body end face of the solenoid valve to be tested.

[0007] As a preferred embodiment of the solenoid valve gasket selection device of the present invention, it further includes: a support frame; wherein the support frame is configured with an open working space, and the base is configured at the bottom of the working space; the support frame is configured with a linear guide rail, and a first slide block and a second slide block are slidably mounted on the linear guide rail; an anti-spring is provided between the first slide block and the second slide block, and the sleeve and the displacement sensor are detachably mounted on the second slide block; the first slide block is provided with a guide rod, one end of which is connected to the force sensor; the sliding guide direction of the linear guide rail is parallel to the linear displacement direction of the measuring pressure head.

[0008] As a preferred embodiment of the solenoid valve gasket selection device of the present invention, it further includes an electric cylinder for driving the first slide to reciprocate along the sliding guide direction of the linear guide rail; the electric cylinder is detachably mounted on the upright, and the piston rod of the electric cylinder is connected to the first slide.

[0009] As a preferred embodiment of the solenoid valve gasket selection device of the present invention, it further includes a pre-pressure protection component for preventing damage to the force sensor due to overpressure; the pre-pressure protection component includes an intermediate shaft and a protective spring sleeved outside the intermediate shaft; wherein one end of the intermediate shaft is connected to the output end of the electric cylinder and the other end is connected to the first slide.

[0010] As a preferred embodiment of the solenoid valve gasket selection device of the present invention, it further includes a pre-compression component for pre-compressing the solenoid valve under test before the measuring pressure head acts on the solenoid valve under test to ensure that the end face of the main body of the solenoid valve under test is flush; the pre-compression component includes a pressure plate slide and a cylinder; wherein the cylinder is detachably mounted on the upright and the piston rod of the cylinder is connected to the pressure plate slide; and the pressure plate slide is slidably mounted on the linear guide rail and arranged between the second slide and the base.

[0011] As a preferred embodiment of the solenoid valve gasket selection device of the present invention, the pressure plate slide is provided with a circular hole that matches the outer contour of the outer shell of the solenoid valve to be tested, for the end of the pressure rod to pass through and press the main valve core of the solenoid valve to be tested.

[0012] Specifically, the present invention also provides the following technical solution: a method for selecting a solenoid valve gasket, using the aforementioned solenoid valve gasket selection device, specifically including the following steps: Place the solenoid valve to be tested on the base; The measuring pressure head is controlled to press down, and the force sensor and the displacement sensor synchronously collect the downward force value and downward displacement value during the pressing process of the measuring pressure head; The data processing and calculation module generates a force-displacement curve based on the downward pressure value and the downward displacement value, and identifies the inflection point of the force-displacement curve. Based on the downward displacement value corresponding to the inflection point, the height difference L1 between the main valve core end face and the main body end face of the solenoid valve under test is calculated and obtained. Obtain the protrusion height L2 of the main valve seat of the solenoid valve under test; The difference between the height difference L1 and the protrusion height L2 of the main valve seat of the solenoid valve under test is calculated, and ΔL = L1 - L2 is recorded. Based on the result of the difference calculation, a primary gasket of appropriate thickness is selected.

[0013] As a preferred embodiment of the solenoid valve gasket selection method of the present invention, the protrusion height L2 of the main valve seat of the solenoid valve under test is directly measured by the displacement sensor.

[0014] As a preferred embodiment of the solenoid valve gasket selection method of the present invention, the step of calculating the height difference L1 between the main valve core end face and the outer shell body end face based on the downward displacement value corresponding to the inflection point specifically includes the following steps: The measuring head is pressed down to make the base surface of the sleeve contact the end face of the outer shell of the solenoid valve under test, and the zero position is recorded to calibrate the solenoid valve under test. Control the two-stage downward pressure of the measuring pressure head to press the lower end face of the pressure rod down until it is flush with the fixed base surface; The displacement sensor is used to collect the downward displacement value of the two sections of the pressure rod, and the zero displacement value h1 is recorded. The measuring pressure head is controlled to press down in three stages, causing the pressure rod to press down and compress the main stage soft spring and main stage hard spring of the solenoid valve under test; The force sensor and the displacement sensor collect the downward pressure value and downward displacement value during the three-stage downward pressing process, and generate a force-displacement curve based on the downward pressure value and downward displacement value. Identify the inflection point of the force-displacement curve, obtain the downward displacement value corresponding to the inflection point, and record the inflection point displacement value h2; wherein, the inflection point displacement value h2 is the downward displacement value when the main stage soft spring is compressed to the point where the main valve core contacts the main stage hard spring. Based on the difference between the zero displacement value h1 and the inflection point displacement value h2, the height difference L1 between the main valve core end face and the outer shell body end face of the solenoid valve under test is obtained, and L1 is denoted as h2-h1.

[0015] The beneficial effects of this invention are as follows: By pressing down on the solenoid valve under test after removing the main valve seat using a measuring pressure head, the force sensor and displacement sensor synchronously collect the pressure value and displacement value, thereby generating a force-displacement curve to identify the inflection point. This allows for the accurate calculation of the height difference L1 between the main valve core end face and the main body end face of the solenoid valve under test. Then, the height L2 of the main valve seat protrusion of the solenoid valve under test is obtained by separate calculation and the difference is calculated with the height difference L1, denoted as ΔL=L1-L2. Finally, a main stage gasket of appropriate thickness is selected according to the value range of ΔL, completing the non-destructive measurement of the key dimensions required for the selection of the main stage gasket of the solenoid valve. This achieves efficient and accurate selection of the main stage gasket. At the same time, the calculation process is also a working condition simulation process, ensuring that the selected main stage gasket meets the actual use requirements of the corresponding solenoid valve. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the solenoid valve gasket selection device in one embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the solenoid valve gasket selection device in one embodiment of the present invention. Figure 2 ; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the measuring head in the solenoid valve gasket selection device according to one embodiment of the present invention; Figure 5 This is a side view of the solenoid valve gasket selection device according to an embodiment of the present invention; Figure 6 This is a cross-sectional view of the solenoid valve under test in one embodiment of the present invention; Figure 7 This is a force-displacement curve generated by the data processing and calculation module in one embodiment of the present invention; Figure 8 This is a flowchart illustrating the steps of the solenoid valve gasket selection method in one embodiment of the present invention.

[0018] In the diagram: 1. Base; 11. Positioning groove; 12. Hard helical spring; 2. Calculation component; 21. Measuring pressure head; 211. Sleeve; 211a. Mounting groove; 211b. Shaft hole; 211c. Base surface; 212. Pressure rod; 22. Force sensor; 23. Displacement sensor; 3. Stand; 4. Linear guide rail; 5. First slide; 51. Contact spring; 52. Guide rod; 6. Second slide; 7. Electric cylinder; 8. Preload protection component; 81. Intermediate shaft; 82. Protective spring; 9. Preload component; 91. Pressure plate slide; 911. Round hole; 92. Cylinder; 101. Outer shell; 102. Main stage hard spring washer; 103. Main stage soft spring washer; 104. Main stage hard spring; 105. Main stage soft spring; 106. Main valve core; 107. Main valve seat. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0022] Furthermore, the present invention will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for ease of explanation, the cross-sectional views of the device structure will be partially enlarged without adhering to the general scale. Moreover, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention.

[0023] Example 1 Reference Figures 1-7In this embodiment, a solenoid valve gasket selection device is proposed for selecting gaskets for solenoid valves. The device measures the height difference L1 between the end face of the main valve core 106 and the end face of the outer casing 101 of the solenoid valve under test, as well as the protrusion height L2 of the main valve seat 107 of the solenoid valve under test. The difference is calculated as ΔL = L1 - L2, and a main stage gasket of appropriate thickness is selected based on the result of the difference calculation.

[0024] Specifically, such as Figure 6 As shown, the solenoid valve under test includes a housing body 101, a main stage hard spring washer 102, a main stage soft spring washer 103, a main stage hard spring 104, a main stage soft spring 105, a main valve core 106, and a main valve seat 107. The main stage hard spring washer 102 and the main stage soft spring washer 103 are both located at the bottom of the inner cavity of the housing body 101. The main stage hard spring 104 and the main stage soft spring 105 are respectively placed on the main stage hard spring washer 102 and the main stage soft spring washer 103, supporting the main valve core 106 and the main valve seat 107. The main valve seat 107 is located at the top opening of the housing body 101, and the main valve seat 107 abuts against the facing surfaces of the main valve core 106.

[0025] It is worth noting that, in the free state, the main soft spring 105 is higher than the main hard spring 104.

[0026] During the measurement process, the main valve seat 107 of the solenoid valve under test needs to be removed so that the solenoid valve gasket selection device can measure the height difference L1 between the end face of the main valve core 106 of the solenoid valve under test and the end face of the outer shell 101. The protrusion height L2 of the main valve seat 107 of the solenoid valve under test is measured separately.

[0027] Reference Figures 1-6 The solenoid valve gasket selection device includes a base 1 and a measurement component 2. The base 1 has a positioning groove 11 on its top for positioning and installing the solenoid valve to be tested. Preferably, the positioning groove 11 is a cylindrical groove with an open top, and its diameter matches the outer contour of the main body 101 of the solenoid valve to be tested. During measurement, the operator only needs to place the solenoid valve to be tested in the positioning groove 11 with the main valve core 106 facing upwards to quickly position and initially fix the solenoid valve in the horizontal direction, preventing the solenoid valve from tilting or shifting horizontally, which would affect the accuracy of subsequent measurements.

[0028] Furthermore, such as Figure 2 and Figure 5 As shown, the measurement component 2 is used to measure and calculate, and select the appropriate thickness of the primary gasket based on the calculation results. Specifically, the measurement component 2 includes a measuring pressure head 21, a force sensor 22, a displacement sensor 23, and a data processing and calculation module.

[0029] The measuring pressure head 21 is capable of linear displacement relative to the base 1 and directly acts on the solenoid valve under test. The force sensor 22 and the displacement sensor 23 are used to collect the downward pressure value and downward displacement value when the measuring pressure head 21 acts on the solenoid valve under test, respectively.

[0030] The data processing and calculation module is connected to the force sensor 22 and the displacement sensor 23, and is used to generate a force-displacement curve based on the collected downward pressure value and downward displacement value. Furthermore, the data processing and calculation module can also determine the height difference L1 between the end face of the main valve core 106 of the solenoid valve under test and the end face of the outer shell 101 based on the force-displacement curve, and calculate the difference between the height difference L1 and the protrusion height L2 of the main valve seat 107 of the solenoid valve under test, and then select a main stage gasket of appropriate thickness based on the result of the difference calculation.

[0031] Specifically, in this embodiment, the force sensor 22 is selected as the HBM-S2M high-precision pressure sensor 22, with a maximum range of 200N and an accuracy of 0.02%.

[0032] Specifically, in this embodiment, the displacement sensor 23 is a Keyence GT2-P12K displacement sensor 23 with a minimum resolution of 0.001mm.

[0033] Furthermore, such as Figure 4 As shown, in some preferred embodiments, the measuring pressure head 21 includes a sleeve 211.

[0034] Specifically, such as Figure 4 As shown, in this embodiment, the sleeve 211 is provided with a mounting groove 211a for positioning and mounting the force sensor 22.

[0035] Specifically, such as Figure 4 As shown, in this embodiment, the sleeve 211 has a shaft hole 211b communicating with the mounting groove 211a at one end facing the base 1, and a pressure rod 212 is provided in the shaft hole 211b. The pressure rod 212 can be axially displaced relative to the shaft hole 211b. One end of the pressure rod 212 is always in contact with the force-receiving end of the force sensor 22, and the other end can extend outside the sleeve 211 and contact and separate from the end face of the main valve core 106 of the solenoid valve to be tested.

[0036] During measurement, the chip under test is placed in the positioning cavity of the base 1. The measuring pressure head 21 moves linearly in the vertical direction and acts directly on the solenoid valve under test. That is, the downward pressing end face of the pressure rod 212 contacts and presses down on the main valve core 106 of the solenoid valve under test, causing the main stage soft spring 105 and / or main stage hard spring 104 below the main valve core 106 to be compressed. Since one end of the pressure rod 212 always remains in contact with the force-receiving end of the force sensor 22, according to Newton's third law, during the process of the pressure rod 212 pressing down on the main valve core 106 of the solenoid valve under test, it is simultaneously subjected to the reaction force generated by the compression of the main stage soft spring 105 and the main stage hard spring 104, which is collected by the force sensor 22, i.e., the downward pressure value is obtained.

[0037] It is worth noting that, in this example, after the sleeve 211, the force sensor 22, and the pressure rod 212 are assembled, the force-receiving end of the force sensor 22 is aligned with the positioning groove 11. This ensures that the force sensor 22 is not subjected to lateral force during measurement, thus avoiding measurement distortion caused by lateral force. Specifically, such as Figure 4 As shown, in this embodiment, the end of the sleeve 211 facing the base 1 has a base surface 211c, which can contact and separate from the end face of the housing body 101 of the solenoid valve under test. The base surface 211c is used to provide a stable reference plane during the measurement process. In use, the position where the base surface 211c contacts the end face of the housing body 101 of the solenoid valve under test is marked as the zero position. The displacement sensor 23 starts to collect the downward displacement value of the pressure rod 212 based on the zero position, eliminating the measurement error caused by the unevenness of the end face of the housing body 101, and ensuring that the downward displacement value collected by the displacement sensor 23 has a traceable reference zero position, thereby improving the accuracy of the height difference L1.

[0038] Furthermore, such as Figure 1 , Figure 2 and Figure 5 As shown, in some preferred embodiments, the solenoid valve gasket selection device further includes a support frame 3.

[0039] Specifically, such as Figure 1 As shown, in this embodiment, the stand 3 is configured with an open working space, and the base 1 is disposed at the bottom of the working space. The open working space facilitates the operator to access the solenoid valve under test from multiple directions and is easy to modify to supplement the equipment with additional components.

[0040] Specifically, such as Figure 1 As shown, in this embodiment, the support frame 3 is equipped with a linear guide rail 4, and a first slide block 5 and a second slide block 6 are slidably mounted on the linear guide rail 4.

[0041] Specifically, such as Figure 2 and Figure 5 As shown, in this embodiment, an abutment spring 51 is provided between the first slide block 5 and the second slide block 6; thus, when the first slide block 5 slides along the linear guide rail 4, the abutment spring 51 pushes the second slide block 6 to slide synchronously.

[0042] It is worth noting that, such as Figure 2 and Figure 5 As shown, in this example, both the sleeve 211 and the displacement sensor 23 can be detachably mounted on the second slide block 6, so that when the second slide block 6 slides, the sleeve 211 and the displacement sensor 23 slide synchronously.

[0043] Specifically, such as Figure 2 and Figure 5 As shown, in this embodiment, the first slide block 5 is provided with a guide rod 52, one end of which is connected to the force sensor 22; thus, when the first slide block 5 slides, the force sensor 22 and the pressure rod 212 are pushed to slide synchronously through the guide rod 52.

[0044] It is worth noting that, such as Figure 2 and Figure 5 As shown, in this example, the first slide block 5 is connected to the second slide block 6 and the force sensor 22 respectively through the abutment spring 51 and the guide rod 52, so that the sleeve 211 and the pressure rod 212 can move down synchronously and in segments.

[0045] During measurement, the first slide block 5 pushes the second slide block 6 and the force sensor 22 respectively through the abutment spring 51 and the guide rod 52, causing the sleeve 211 and the pressure rod 212 to move downward synchronously. This continues until the base surface 211c of the sleeve 211 contacts the end face of the outer shell 101 of the solenoid valve under test, establishing the zero-point reference surface for measurement. At this point, the sleeve 211, the displacement sensor 23, and the second slide block 6 are all limited by the end face of the outer shell 101 of the solenoid valve under test. Subsequently, when the first slide block 5 continues to slide, it can only push the pressure sensor 22 and the pressure rod 212 to slide through the guide rod 52. A positional difference appears between the pressure rod 212 and the displacement sensor 23, which is recorded by the displacement sensor 23, thus achieving the acquisition of the downward displacement value.

[0046] It is worth noting that, such as Figures 1-5As shown, in this example, the sliding guide direction of the linear guide rail 4 is set parallel to the linear displacement direction of the measuring pressure head 21, ensuring that the downward trajectory of the measuring pressure head 21 is strictly along the vertical direction, thereby ensuring that the downward force value and downward displacement value collected by the force sensor 22 and the displacement sensor 23 are accurate.

[0047] Specifically, such as Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the solenoid valve gasket selection device further includes an electric cylinder 7. The electric cylinder 7 is a power source that can provide stable and controllable linear thrust to drive the first slide block 5 to slide back and forth along the sliding guide direction of the linear guide rail 4, so as to complete the pressing and returning operations during the calculation process.

[0048] Specifically, such as Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the electric cylinder 7 is detachably mounted on the upright frame 3, and the piston rod of the electric cylinder 7 is connected to the first slide block 5.

[0049] Specifically, in this embodiment, the minimum walking step distance of the electric cylinder 7 is 0.001mm.

[0050] Furthermore, such as Figure 1 , Figure 2 and Figure 5 As shown, in some preferred embodiments, the solenoid valve gasket selection device further includes a pre-pressure protection component 8 for preventing overpressure damage to the force sensor 22.

[0051] Specifically, such as Figure 2 and Figure 5 As shown, in this embodiment, the preload protection component 8 includes an intermediate shaft 81 and a protective spring 82 sleeved on the outside of the intermediate shaft 81. One end of the intermediate shaft 81 is connected to the output end of the electric cylinder 7, and the other end is connected to the first slide block 5, thus providing a reliable connection between the electric cylinder 7 and the first slide block 5. The protective spring 82 has a preload stroke. During measurement, if the downward stroke exceeds a preset range, the protective spring 82 can reach its limit load state before the force sensor 22 and undergo further compression, thereby limiting the maximum thrust of the piston rod of the electric cylinder 7 on the first slide block 5, preventing the force sensor 22 from being damaged due to overpressure, thus achieving overload protection for the force sensor 22 and improving the reliability and safety of the solenoid valve gasket selection device.

[0052] Specifically, in this embodiment, the protective spring 82 has a preload stroke of 6mm. Furthermore, such as Figures 1-3 and Figure 5 As shown, in some preferred embodiments, the solenoid valve gasket selection device further includes a pre-compression component 9, which is used to pre-compress the solenoid valve under test before the measuring pressure head 21 acts on the solenoid valve under test to ensure that the end face of the outer shell body 101 of the solenoid valve under test is flush, thereby improving the measurement accuracy.

[0053] Specifically, such as Figure 2 , Figure 3 and Figure 5 As shown, in this embodiment, the pre-compression assembly 9 includes a pressure plate slide 91 and a cylinder 92. The cylinder 92 is detachably mounted on the upright 3, and its piston rod is connected to the pressure plate slide 91. The pressure plate slide 91 is slidably mounted on the linear guide rail 4 and is positioned between the second slide 6 and the base 1.

[0054] In use, the cylinder 92 drives the pressure plate slide 91 to move vertically downward to press the solenoid valve under test, thereby keeping the end face of the outer shell 101 of the solenoid valve under test flush and eliminating measurement errors caused by improper placement of the solenoid valve under test or slight tilting of the end face of the main valve core 106.

[0055] Specifically, such as Figure 3 As shown, in this embodiment, the pressure plate slide 91 is provided with a circular hole 911 that matches the outer contour of the housing body 101 of the solenoid valve under test, for the end of the pressure rod 212 to pass through the main valve core 106 that presses down on the solenoid valve under test.

[0056] Furthermore, such as Figure 3 As shown, in some preferred embodiments, the base 1 is equipped with a hard helical spring 12, which provides a reaction force when the solenoid valve under test is compressed to ensure that the end face of the housing body 101 of the solenoid valve under test can remain horizontal.

[0057] In summary, this embodiment proposes a solenoid valve gasket selection device. The measuring pressure head 21 presses down on the solenoid valve under test after the main valve seat 107 has been removed. The force sensor 22 and displacement sensor 23 simultaneously collect the pressure and displacement values, generating a force-displacement curve to identify inflection points. This allows for the accurate calculation of the height difference L1 between the end face of the main valve core 106 and the end face of the outer shell 101. The height L2 of the main valve seat 107 protrusion is then calculated separately and compared with the height difference L1. The difference is denoted as ΔL = L1 - L2. Finally, a main stage gasket of appropriate thickness is selected based on the range of ΔL. This completes the non-destructive measurement of the key dimensions required for solenoid valve main stage gasket selection, achieving efficient and accurate selection. Furthermore, the calculation process is also a working condition simulation process, ensuring that the selected main stage gasket meets the actual usage requirements of the corresponding solenoid valve.

[0058] Example 2 Reference Figures 6-8 In this embodiment, a method for selecting solenoid valve gaskets is proposed, using the solenoid valve gasket selection device described in Embodiment 1, specifically including the following steps: The solenoid valve to be tested is placed on the base 1, and the positioning groove 11 is used to position and install the solenoid valve to be tested.

[0059] The measuring pressure head 21 is controlled to press down, and the force sensor 22 and the displacement sensor 23 synchronously collect the downward force value and downward displacement value during the pressing process of the measuring pressure head 21.

[0060] The data processing and calculation module generates a force-displacement curve based on the downward pressure value and the downward displacement value, and identifies the inflection point of the force-displacement curve.

[0061] The height difference L1 between the end face of the main valve core 106 of the solenoid valve under test and the end face of the outer shell 101 is calculated based on the downward displacement value corresponding to the inflection point.

[0062] Obtain the protrusion height L2 of the main valve seat 107 of the solenoid valve under test.

[0063] The difference between the height difference L1 and the protrusion height L2 of the main valve seat 107 of the solenoid valve under test is calculated, and ΔL = L1 - L2 is recorded.

[0064] Based on the result of the difference calculation, a primary gasket of appropriate thickness is selected.

[0065] It is worth noting that, in this embodiment, during the measurement process, the solenoid valve under test is a solenoid valve in which a main stage hard spring washer 102, a main stage soft spring washer 103, a main stage hard spring 104, a main stage soft spring 105, and a main valve core 106 are assembled inside the housing body 101; that is, during the measurement process, the main valve core 106 of the solenoid valve under test is in an accessible state; that is, during the measurement process, the main valve seat 107 of the solenoid valve under test needs to be removed. The protrusion height L2 of the main valve seat 107 of the solenoid valve under test is directly measured by the displacement sensor 23.

[0066] Furthermore, in this embodiment, the step of calculating the height difference L1 between the end face of the main valve core 106 of the solenoid valve under test and the end face of the outer shell 101 based on the downward displacement value corresponding to the inflection point specifically includes the following steps: The measuring head 21 is controlled to press down a section, so that the base surface 211c of the sleeve 211 abuts against the end face of the outer shell body 101 of the solenoid valve under test, and the zero position is recorded to calibrate the solenoid valve under test; thereby establishing the calculated zero position reference surface.

[0067] Control the measuring pressure head 21 to press down in two stages, so that the pressing end face of the pressure rod 212 is pressed down to be flush with the fixed base surface 211c.

[0068] The displacement sensor 23 collects the downward displacement value of the pressure rod 212 in two stages, and records the zero displacement value h1.

[0069] The measuring pressure head 21 is controlled to press down in three stages, causing the pressure rod 212 to press down and compress the main stage soft spring 105 and the main stage hard spring 104 of the solenoid valve under test.

[0070] The force sensor 22 and the displacement sensor 23 collect the downward pressure value and downward displacement value during the three-stage downward pressing process, and generate a force-displacement curve based on the downward pressure value and downward displacement value.

[0071] Identify the inflection point of the force-displacement curve, obtain the downward displacement value corresponding to the inflection point, and record the inflection point displacement value h2.

[0072] Based on the difference between the zero displacement value h1 and the inflection point displacement value h2, the height difference L1 between the end face of the main valve core 106 of the solenoid valve under test and the end face of the outer shell 101 is obtained, and L1 is denoted as h2-h1.

[0073] Reference Figure 7As can be seen, the force-displacement curve has a smooth segment and a steep segment. As the main valve core 106 is pressed down, the main stage soft spring 105 and the main stage hard spring 104 are compressed in sequence, that is, the main stage soft spring 105 and the main stage hard spring 104 generate reaction forces on the main valve core 106 in sequence. Therefore, when the main valve core 106 only compresses the main stage soft spring 105, the reaction force on the main valve core 106 is relatively small, corresponding to the smooth section; while when the main valve core 106 compresses both the main stage soft spring 105 and the main stage hard spring 104 simultaneously, the reaction force on the main valve core 106 is relatively large, corresponding to the steep section. Thus, the inflection point displacement value can be obtained from the force-displacement curve. The inflection point of the force-displacement curve is the transition point from the smooth section to the steep section. The inflection point displacement value h2 is the downward displacement value when the main stage soft spring 105 is compressed to the point where the main valve core 106 contacts the main stage hard spring 104. Taking the selection of a 0.4mm primary stage gasket as an example: First, the height difference L1 between the end face of the main valve core 106 of the solenoid valve under test and the end face of the outer shell 101 is measured. This includes the following steps: Place the solenoid valve to be tested into the positioning groove 11 of the base 1.

[0074] The measuring head 21 is pressed down until the base surface 211c of the sleeve 211 contacts the end face of the outer shell body 101 of the solenoid valve under test, and the zero position is recorded to calibrate the solenoid valve under test.

[0075] The pressure rod 212 is controlled to continue pressing down until the pressing end face of the pressure rod 212 contacts the end face of the main valve core 106 of the solenoid valve under test, and the value of the displacement sensor 23 is read as 2.434mm, that is, h1=2.434mm.

[0076] The pressure rod 212 is controlled to continue pressing down, and the force sensor 22 and displacement sensor 23 collect the downward force value and downward displacement value and generate a force-displacement curve accordingly; Identify the inflection point of the force-displacement curve and obtain the inflection point displacement value h2 = 3.958 mm.

[0077] The difference is calculated to obtain the height difference L1, i.e., L1 = h2 - h1 = 3.958 - 2.434 = 1.524 mm.

[0078] Next, take the main valve seat 107 as a single part, and measure the protrusion height L2 of the main valve seat 107 through the displacement sensor 23. It is 1.852mm, that is, L2=1.852mm.

[0079] Finally, the difference is calculated and the primary gasket is selected based on the difference calculation results.

[0080] That is, ΔL = L1 - L2 = 1.524 - 1.852 = -0.328 mm. Since -0.328 mm falls within the range of the third group, a primary gasket with a thickness of 0.4 mm is selected.

[0081] It is worth noting that there are seven specifications for the main stage gaskets, each differing by 0.025mm, as detailed in Table 1 below: Table 1. Reference Table for Main Stage Gasket Selection Specifications In summary, in this example, the solenoid valve gasket selection method uses a force sensor 22 and a displacement sensor 23 to accurately acquire the downward pressure and downward displacement values. The compression state of the main stage soft spring 105 and main stage hard spring 104 of the solenoid valve under test is converted into quantifiable force and displacement data. Inflection points are identified using a force-displacement curve to accurately determine the height difference L1 between the end face of the main valve core 106 and the end face of the outer shell 101. Simultaneously, the displacement sensor 23 acquires the protrusion height L2 of the main valve seat 107 of the solenoid valve under test. Furthermore, the difference between the height difference L1 and the protrusion height L2 of the main valve seat 107 can be calculated, denoted as ΔL = L1 - L2, and a main stage gasket of appropriate thickness is selected based on the result of the difference calculation. This completes the non-destructive measurement of the key dimensions required for selecting the main stage gasket for the solenoid valve under test, ensuring the efficiency and accuracy of the main stage gasket selection.

[0082] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A solenoid valve gasket selection device, characterized in that, include, The base (1) has a positioning groove (11) on its top for positioning and installing the solenoid valve to be tested; as well as, The measurement component (2) includes a measuring head (21), a force sensor (22), a displacement sensor (23), and a data processing and calculation module; wherein, The measuring head (21) can be linearly displaced relative to the base (1) and directly act on the solenoid valve to be tested; The force sensor (22) and the displacement sensor (23) are used to collect the downward pressure value and downward displacement value when the measuring head (21) acts on the solenoid valve under test, respectively; The data processing and calculation module is connected to the force sensor (22) and the displacement sensor (23) for generating a force-displacement curve based on the collected downward pressure value and downward displacement value. Based on the force-displacement curve, the module determines the height difference L1 between the end face of the main valve core (106) of the solenoid valve under test and the end face of the outer shell body (101). The module calculates the difference between the height difference L1 and the protrusion height L2 of the main valve seat (107) of the solenoid valve under test, and selects a main stage gasket of appropriate thickness based on the result of the difference calculation. The measuring pressure head (21) includes a sleeve (211); The sleeve (211) is provided with a mounting groove (211a) for positioning and mounting the force sensor (22). The sleeve (211) is provided with a shaft hole (211b) communicating with the mounting groove (211a) at one end facing the base (1), and a pressure rod (212) is provided in the shaft hole (211b). The pressure rod (212) is axially displaced relative to the shaft hole (211b). One end of the pressure rod (212) is always in contact with the force-receiving end of the force sensor (22), and the other end can extend to the outside of the sleeve (211) and contact and separate from the end face of the main valve core (106) of the solenoid valve to be tested. The sleeve (211) has a base surface (211c) at one end facing the base (1), and the base surface (211c) can contact and separate from the end face of the outer shell body (101) of the solenoid valve to be tested.

2. The solenoid valve gasket selection device as described in claim 1, characterized in that, It also includes the support frame (3); among which, The stand (3) is equipped with an open working space, and the base (1) is disposed at the bottom of the working space; The upright frame (3) is equipped with a linear guide rail (4), and a first slide block (5) and a second slide block (6) are slidably mounted on the linear guide rail (4). A contact spring (51) is provided between the first slide (5) and the second slide (6), and the sleeve (211) and the displacement sensor (23) can be detachably installed on the second slide (6); The first slide (5) is provided with a guide rod (52), one end of which is connected to the force sensor (22); The sliding guide direction of the linear guide rail (4) is set parallel to the linear displacement direction of the measuring pressure head (21).

3. The solenoid valve gasket selection device as described in claim 2, characterized in that, It also includes an electric cylinder (7) for driving the first slide (5) to slide back and forth along the sliding guide direction of the linear guide (4); The electric cylinder (7) is detachably mounted on the stand (3), and the piston rod of the electric cylinder (7) is connected to the first slide (5).

4. The solenoid valve gasket selection device as described in claim 3, characterized in that, It also includes a pre-pressure protection component (8) to prevent damage to the force sensor (22) due to overpressure; The preload protection component (8) includes an intermediate shaft (81) and a protective spring (82) sleeved on the outside of the intermediate shaft (81); wherein one end of the intermediate shaft (81) is connected to the output end of the electric cylinder (7) and the other end is connected to the first slide (5).

5. The solenoid valve gasket selection device as described in claim 2, characterized in that, It also includes a pre-pressurization component (9) for pre-pressing the solenoid valve under test before the measuring pressure head (21) acts on the solenoid valve under test to ensure that the end face of the housing body (101) of the solenoid valve under test is flush. The pre-compression assembly (9) includes a pressure plate slide (91) and a cylinder (92); wherein the cylinder (92) is detachably mounted on the stand (3) and the piston rod of the cylinder (92) is connected to the pressure plate slide (91); and the pressure plate slide (91) is slidably mounted on the linear guide rail (4) and arranged between the second slide (6) and the base (1).

6. The solenoid valve gasket selection device as described in claim 5, characterized in that, The pressure plate slide (91) is provided with a round hole (911) that matches the outer contour of the housing body (101) of the solenoid valve under test, for the end of the pressure rod (212) to pass through the main valve core (106) of the solenoid valve under test.

7. A method for selecting gaskets for solenoid valves, characterized in that, The solenoid valve gasket selection device as described in any one of claims 1-6 specifically includes the following steps: Place the solenoid valve to be tested on the base (1); The measuring head (21) is controlled to press down, and the force sensor (22) and the displacement sensor (23) synchronously collect the downward force value and downward displacement value during the pressing process of the measuring head (21); The data processing and calculation module generates a force-displacement curve based on the downward pressure value and the downward displacement value, and identifies the inflection point of the force-displacement curve. The height difference L1 between the end face of the main valve core (106) of the solenoid valve under test and the end face of the outer shell body (101) is calculated based on the downward displacement value corresponding to the inflection point. Obtain the protrusion height L2 of the main valve seat (107) of the solenoid valve under test; The difference between the height difference L1 and the protrusion height L2 of the main valve seat (107) of the solenoid valve to be tested is calculated, and ΔL = L1 - L2 is recorded. Based on the result of the difference calculation, a primary gasket of appropriate thickness is selected.

8. The method for selecting solenoid valve gaskets as described in claim 7, characterized in that, The height L2 of the main valve seat (107) of the solenoid valve under test is directly measured by the displacement sensor (23).

9. The method for selecting solenoid valve gaskets as described in claim 8, characterized in that, The calculation of the height difference L1 between the end face of the main valve core (106) of the solenoid valve under test and the end face of the outer shell body (101) based on the downward displacement value corresponding to the inflection point specifically includes the following steps: Control the measuring head (21) to press down a section so that the base surface (211c) of the sleeve (211) abuts against the end face of the outer shell body (101) of the solenoid valve to be tested, and record the zero position to calibrate the solenoid valve to be tested; Control the measuring pressure head (21) to press down in two stages, so that the pressing end face of the pressure rod (212) is pressed down to be flush with the fixed base surface (211c); The displacement sensor (23) collects the downward displacement value of the two-stage downward pressure of the pressure rod (212), and records the zero displacement value h1. Control the measuring head (21) to press down in three stages, so that the pressure rod (212) presses down to compress the main stage soft spring (105) and the main stage hard spring (104) of the solenoid valve under test. The force sensor (22) and the displacement sensor (23) collect the downward pressure value and downward displacement value during the three-stage downward pressing process, and generate a force-displacement curve based on the downward pressure value and downward displacement value. Identify the inflection point of the force-displacement curve, obtain the downward displacement value corresponding to the inflection point, and record the inflection point displacement value h2; wherein, the inflection point displacement value h2 is the downward displacement value when the main stage soft spring (105) is compressed to the point where the main valve core (106) contacts the main stage hard spring (104). Based on the zero displacement value h1 and the inflection point displacement value h2, the difference is calculated to obtain the height difference L1 between the end face of the main valve core (106) of the solenoid valve under test and the end face of the outer shell body (101), and L1 is recorded as h2-h1.

Images