Quick response ability detection device for high-precision electromagnetic valve

Abstract

The application discloses a quick response capability detection device for a high-precision electromagnetic valve and relates to the technical field of electromagnetic valve detection, comprising a positioning frame and a transmission table, wherein the transmission table is sleeved with the positioning frame and is slidably connected to the slide rod, and the side wall of the transmission table is fixed with valve body positioning tools at equal intervals through bolts; the device integrates a micro optical fiber sensing module and a high-frequency response pressure sensor, realizes synchronous measurement of the displacement of a valve core and outlet pressure, overcomes the limitation of single parameter measurement, and simultaneously adopts a micro optical fiber probe to detect the displacement of the valve core through a micro installation hole on the valve body, so that the influence on the movement of the valve core is reduced, and the problem that the traditional direct detection method needs to greatly change the structure of the electromagnetic valve is avoided, the diameter of the flow channel is adjusted by rotating a layer sleeve block in a variable control mechanism in the initial detection stage, multi-working condition simulation from low pressure and large flow to high pressure and small flow is realized, and the detection condition is closer to the actual working environment of the electromagnetic valve.

Description

Technical Field

[0001] This invention relates to the field of solenoid valve testing technology, specifically to a device for testing the rapid response capability of high-precision solenoid valves. Background Technology

[0002] As a core control component of electro-hydraulic and pneumatic systems, the dynamic response characteristics of solenoid valves directly determine the response speed and control accuracy of the entire system. With the continuous improvement of the performance requirements of control systems in high-end equipment manufacturing, aerospace, precision industry and other fields, the accurate detection of the fast response capability of high-precision solenoid valves has become a key link in evaluating their performance and quality.

[0003] Currently, the dynamic response detection methods for solenoid valves are mainly divided into two categories: direct detection methods and indirect detection methods. Each method has different technical limitations. Direct detection methods integrate displacement sensors with the valve core to directly obtain the valve core's motion state. However, this efficient measurement method has an additional mass effect, which changes the original dynamic characteristics of the valve core and leads to measurement distortion. Indirect detection methods reflect the dynamic characteristics of the solenoid valve by testing the pressure changes in the cavity. For example, the "transitional state multi-segment sampling test method" used in the invention patent application with publication number CN118566602A divides the solenoid valve action process into delay, acceleration, and stabilization stages for synchronous sampling. However, the pressure response in the cavity lags behind the dynamic characteristics of the valve core, and the larger the cavity volume, the more severe the lag, affecting the overall measurement data accuracy.

[0004] Therefore, we propose a rapid response capability testing device for high-precision solenoid valves. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid response capability testing device for high-precision solenoid valves, thereby solving the problems mentioned in the background art;

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for testing the rapid response capability of a high-precision solenoid valve, comprising a positioning frame and a transmission platform, wherein the transmission platform is slidably connected to a slide rod mounted on the positioning frame, and a valve body positioning fixture is fixed to the side wall of the transmission platform by bolts at equal intervals.

[0007] Angle deflection drive frames are evenly installed on the positioning frame platform support. From bottom to top, a miniature fiber optic sensing module, a positioning calibration module one, and a fluid dynamic response module are installed on the surface of the angle deflection drive frame on one side support. A positioning calibration module two is installed on the angle deflection drive frame installed on the other side support.

[0008] A cylinder is fixed to the bottom support of the positioning frame by bolts. A drive platform is slidably connected to the end of the cylinder and located on the support. A phase control mechanism is fixed on the drive platform. The phase control mechanism includes a sealing block set on the top of the drive platform. A liquid guide plug is installed on the top of the sealing block.

[0009] Furthermore, a drive positioning bolt is installed on the top of the positioning frame, and a correction block is installed on one side of the transmission table, with holes on the correction block corresponding to the valve body positioning fixture on the transmission table.

[0010] Furthermore, the top corner deflection drive frame of the positioning frame consists of an electric push rod and a slider. The miniature fiber optic sensing module is mounted on the slider and driven by the electric push rod. The miniature fiber optic sensing module includes a fiber optic micro-displacement sensor and a fiber optic demodulator connected to the outside.

[0011] Furthermore, a positioning calibration module one is provided on the top of the micro fiber optic sensing module's angle deflection drive frame, and micro strain gauges are provided at the ends of the positioning calibration module two provided on the other side's angle deflection drive frame.

[0012] Furthermore, a fluid dynamic response module is provided on the top corner deflection drive frame of the positioning frame. The fluid dynamic response module consists of an abutment sleeve and a miniaturized cavity and a high-frequency response pressure sensor installed inside the abutment sleeve.

[0013] Furthermore, the phase-changing control mechanism at the bottom of the positioning frame also includes a central control cavity disposed within the sealing block body. A layered sleeve block is movably connected within the central control cavity. A through pipe is disposed through the sealing block body. A drive gear column is slidably connected within the through pipe. The drive gear column is located within the sealing block body and meshes with a gear sleeved on the layered sleeve block. A second cylinder is fixed to the outer wall of the sealing block body. One side of the second cylinder is connected to the drive gear column.

[0014] Furthermore, the central control cavity has symmetrically opened channels on the layered block, the sealing block has a temporary storage cavity on the side of the layered block, and the sealing block has a variable diameter conveying cavity one and a variable diameter conveying cavity two. The variable diameter conveying cavity one and the variable diameter conveying cavity two are connected to the liquid guide plug at the top, and each of them has a one-way valve on its connecting pipe.

[0015] Furthermore, a liquid guide box is fixed to the positioning frame by bolts, and the liquid guide box is connected to the temporary storage cavity inside the sealing block by a side connecting pipe.

[0016] The method for testing the rapid response capability of high-precision solenoid valves is as follows:

[0017] Regarding the installation and positioning calibration of the solenoid valve itself, the solenoid valve body is stably transported by the transmission table after being installed on the valve body positioning fixture. It works in conjunction with the top drive positioning bolt to extend and contact the surface hole of the correction block. At the same time, the two side angle offset drive frames push the positioning calibration module one and the positioning calibration module two to complete the abutment of the valve body on the outer side of the valve body on the valve body positioning fixture. The micro strain gauges on its surface complete the fit of the valve body outer wall. Based on the pressure feedback of the micro strain gauges and the overall position calibration of the transmission table, the position of the solenoid valve on the valve body positioning fixture and the transmission table is locked.

[0018] The valve core displacement measurement and corresponding end pressure feedback are achieved by machining a miniature mounting hole on the valve body aligned with the valve core. The micro fiber optic sensing module is moved to the solenoid valve core mounting position by the angle deflection drive frame, so that the fiber optic probe set in the ceramic ferrule is fixed in the mounting hole. This ensures that the probe end face is strictly perpendicular to the valve core movement axis and at the appropriate distance. At the same time, the fluid dynamic response module on the top is sealed to the solenoid valve outlet. A miniature high-frequency piezoresistive pressure sensor is installed on the side of the cavity. The sensor's sensing diaphragm should be almost flush with the inner wall of the cavity. Finally, the sealing block is moved by the cylinder to send the liquid guide plug to the solenoid valve inlet position, and then the liquid flow response detection begins.

[0019] When the solenoid valve opens rapidly, fluid rushes into the tiny cavity. Due to its small volume, the pressure spikes instantly. When the solenoid valve closes rapidly, the flow path is cut off, and the pressure inside the cavity drops instantly. The rate of pressure change directly reflects the solenoid valve's ability to control flow and its dynamic response speed. Fiber optic sensors measure the valve core displacement in real time, and miniature pressure sensors measure the cavity pressure in real time. The acquisition card simultaneously records the drive voltage and current waveforms. Recording stops after the preset acquisition time is reached. By analyzing the dynamic coupling relationship between displacement and pressure, the dynamic response parameters of the solenoid valve are obtained.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention achieves high-precision, multi-parameter synchronous detection, improving the comprehensiveness and accuracy of response characteristic analysis. By integrating multiple detection units such as a micro-fiber sensing module, a high-frequency response pressure sensor, and a positioning calibration module, it realizes synchronous high-precision measurement of the valve core displacement and outlet pressure of the solenoid valve. The micro-fiber sensing module measures the valve core displacement at the micron level in a non-contact manner, avoiding the influence of additional mass. The fluid dynamic response module has a built-in micro-cavity and a high-frequency response pressure sensor, which can capture millisecond-level pressure fluctuations. Combined with electrical signal acquisition, the system can comprehensively analyze the "electro-mechanical-hydraulic" coupled dynamic response process, accurately evaluate the opening or closing time, flow control characteristics, and hysteresis of the solenoid valve, and provide reliable data support for product optimization.

[0022] 2. This invention possesses adaptive operating condition simulation capabilities, enhancing testing flexibility and engineering applicability. By rotating the layered blocks in the variable phase control mechanism to adjust the flow channel diameter, the pressure and flow rate of the test liquid can be steplessly adjusted, simulating various actual operating conditions from low pressure and high flow rate to high pressure and low flow rate. This mechanism is driven by a cylinder, providing rapid response and enabling automated testing under multiple conditions without replacing components. This significantly broadens the testing range and improves efficiency. Combined with the adjustable medium and temperature functions of the liquid guide box, it further approximates the real working environment of the solenoid valve, enhancing the engineering reference value of the test results. It is suitable for the screening and verification of high-reliability products. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the high-precision solenoid valve rapid response capability testing device of the present invention;

[0024] Figure 2 This is a schematic diagram of the installation structure of multiple detection modules on the inner angle offset drive frame of the high-precision solenoid valve rapid response capability detection device of the present invention.

[0025] Figure 3 This is a schematic diagram showing the contact between the liquid guide plug installed on the top of the sealing block and the inlet of the solenoid valve according to the present invention.

[0026] Figure 4 This is a schematic diagram of the overall main structure of the high-precision solenoid valve rapid response capability testing device of the present invention;

[0027] Figure 5 This is a top view cross-sectional structural diagram of the phase control mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the mounting structure of the inner sleeve block of the central control cavity in this invention.

[0029] In the diagram: 1. Positioning frame; 2. Transmission platform; 3. Valve body positioning fixture; 4. Correction block; 5. Drive positioning bolt; 6. Angle offset drive frame; 7. Miniature fiber optic sensing module; 8. Positioning calibration module one; 9. Positioning calibration module two; 10. Fluid dynamic response module; 11. Cylinder one; 12. Drive platform; 13. Phase change control mechanism; 131. Sealing block; 132. Central control cavity; 133. Layered block; 134. Temporary storage cavity; 135. Variable diameter conveying cavity one; 136. Variable diameter conveying cavity two; 14. Through pipe; 15. Drive toothed column; 16. Cylinder two; 17. Liquid guide box; 18. Liquid guide plug. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-6 The present invention provides a technical solution:

[0032] Example 1: As Figure 1 and Figure 2 As shown, the core of this detection device lies in achieving precise capture and analysis of the solenoid valve switching process through the simultaneous implementation of high-precision displacement sensing and dynamic pressure monitoring.

[0033] The testing begins with high-precision positioning and calibration. The solenoid valve housing, mounted on the valve body positioning fixture 3, is stably transported to the testing station along the slide bar of the positioning frame 1 via the transfer table 2. The driving positioning bolt 5 extends outward and inserts into the corresponding hole of the correction block 4, completing the initial mechanical positioning of the transfer table 2. Subsequently, the two side angle offset driving frames 6 respectively push the positioning calibration module 1 8 and the positioning calibration module 2 9 closer to the valve body, so that the micro strain gauges at their ends are tightly fitted with the outer wall of the valve body. This precision positioning process based on force feedback can control the clamping repeat positioning error within ±0.02mm, providing a stable and accurate foundation for subsequent testing. It greatly eliminates the measurement error introduced by installation deviation. At the same time, it can also perform dynamic monitoring during the solenoid valve testing process and promptly alarm when it generates high-frequency vibration or seal failure, thus improving the overall solenoid valve testing accuracy.

[0034] After positioning is completed, the system enters the synchronous measurement stage of valve core displacement and outlet pressure. A micro mounting hole is pre-made on the valve body at the corresponding position of the solenoid valve core. This mounting hole needs to be resealed later. The angle deflection drive frame 6 drives the micro fiber optic sensing module 7 to move, so that the fiber optic probe and ceramic ferrule installed on the micro fiber optic sensing module are accurately inserted into the mounting hole, ensuring that the probe end face is strictly perpendicular to the valve core movement axis. At the same time, the extrusion force applied by the angle deflection drive frame completes the sealing between the ceramic ferrule end face and the valve body surface to avoid leakage. This non-contact measurement method avoids the influence of the added mass of traditional sensors on the valve core movement. Its micron-level displacement resolution can truly restore the micro dynamic characteristics of the solenoid valve.

[0035] Meanwhile, the fluid dynamic response module 10 at the top is driven to seal the front micro cavity against the outlet of the solenoid valve. The sensing diaphragm of the high-frequency response pressure sensor installed on the side wall of the cavity is flush with the inner wall. The small design of this cavity can have a volume of less than 1 mL, which greatly improves the sensitivity of pressure changes and enables the system to accurately capture pressure fluctuations at the millisecond level and with a frequency of more than 10 kHz. Finally, the cylinder 11 pushes the drive platform 12 and the phase-changing control mechanism 13 forward as a whole, so that the liquid guide plug 18 is sealed and connected to the inlet of the solenoid valve.

[0036] At the start of the test, the control system sends a drive signal, and the solenoid valve performs a rapid opening or closing action. The miniature fiber optic sensing module 7 captures the valve core displacement in real time. When the solenoid valve opens, fluid rushes into the tiny cavity, causing the pressure to surge. When it closes, the pressure drops sharply. The data acquisition card records the drive voltage, current, displacement, and pressure signals simultaneously. By analyzing the dynamic coupling relationship between the valve core displacement and the outlet pressure, this device can not only measure the opening or closing time, but also deeply evaluate the dynamic flow control characteristics, stability, and hysteresis of the solenoid valve, providing comprehensive and reliable "electromechanical-hydraulic" coupled data support for its optimized design.

[0037] Example 2: This example focuses on how to achieve variable control in the initial stage of detection through the phase-change control mechanism 13 to simulate different working conditions, such as... Figure 5 and Figure 6 As shown, the core function of this mechanism is to precisely control the hydraulic strength and flow pattern of the test liquid by changing the cross-section of the flow channel.

[0038] The adjustment function of the phase control mechanism 13 depends on the precise rotation of the layer block 133. In the central control cavity 132 inside the sealing block 131, the layer block 133 rotates through gear meshing. The second cylinder 16 pushes the drive gear 15 set in the through pipe 14 to slide. The drive gear 15 meshes with the gear on the layer block 133, thereby driving it to rotate. The symmetrically opened channels on the layer block 133 correspond to the variable diameter conveying cavity 135 and the variable diameter conveying cavity 136 in the sealing block 131. By controlling the stroke of the second cylinder 16 to set the rotation angle of the layer block 133, the effective diameter of the flow channel can be steplessly adjusted, realizing flexible switching from low pressure and large flow to high pressure and small flow. This design allows a single device to simulate multiple system back pressure conditions without the need for additional parts replacement, significantly expanding the detection range and improving efficiency.

[0039] During testing, the system can preset hydraulic conditions according to test requirements. For example, when evaluating low-pressure opening and closing characteristics, the layer block 133 is in a large opening, and the fluid passes smoothly through the variable diameter conveying chamber 135 and finally enters the solenoid valve through the top liquid guide plug 18. During this process, since the variable diameter conveying chamber 135 and the variable diameter conveying chamber 2 136 are connected to the liquid guide plug 18, backflow problems are avoided during the liquid flow process. Each connecting pipeline is also equipped with a check valve, which only allows water to flow in one direction in the pipeline.

[0040] When testing high-pressure performance, the sleeve block 133 is rotated to a small opening, and the fluid mainly passes through the narrower variable diameter conveying chamber 136, thereby increasing the inlet pressure. This precise and rapid adjustment capability is driven by a cylinder and responds quickly, realizing continuous and automated multi-condition testing, which greatly improves the depth and efficiency of testing.

[0041] The liquid delivery tank 17 is connected to the temporary storage chamber 134 through a pipeline, providing a stable liquid source for testing. By actively setting and precisely controlling the inlet pressure, the testing conditions are made closer to the actual working environment of the solenoid valve. The obtained data such as response delay and sealing performance under high pressure are more valuable for engineering reference and help to screen out high-reliability products. Subsequently, the liquid delivery tank 17 can be automatically adjusted for other conditions such as the infusion medium and temperature to simulate a more comprehensive working environment of the solenoid valve and obtain more extensive and accurate solenoid valve response data.

[0042] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for testing the rapid response capability of a high-precision solenoid valve, comprising a positioning frame (1) and a transmission platform (2), wherein the transmission platform (2) is slidably connected to a slide rod mounted on the positioning frame (1), characterized in that, The side wall of the transmission table (2) is fixed with valve body positioning fixtures (3) by bolts at equal intervals. The positioning frame (1) is evenly supported by angle deflection drive frames (6). The two angle deflection drive frames (6) push the installed positioning calibration module one (8) and positioning calibration module two (9) to complete the valve body positioning fixture to abut against the outside of the valve body. The one angle deflection drive frame (6) controls the installed micro fiber optic sensing module (7) to move to the solenoid valve core installation position. The top angle deflection drive frame (6) pushes the installed fluid dynamic response module (10) and the micro cavity to seal against the solenoid valve outlet. A cylinder (11) is fixed to the bottom support column of the positioning frame (1) by bolts. A drive platform (12) is slidably connected to the end of the cylinder (11) and located on the support column. A phase control mechanism (13) is fixed on the drive platform (12). The phase control mechanism (13) includes a sealing block (131) set on the top of the drive platform (12). A liquid guide plug (18) is installed on the top of the sealing block (131). The phase-change control mechanism (13) provided at the bottom of the positioning frame (1) also includes a central control cavity (132) provided in the sealing block (131). A layered sleeve block (133) is movably connected in the central control cavity (132). A through pipe (14) is provided through the sealing block (131). A drive gear column (15) is slidably connected in the through pipe (14). The drive gear column (15) is located in the sealing block (131) and meshes with a gear sleeved on the layered sleeve block (133). A cylinder two (16) is fixed on the outer wall of the sealing block (131). One side of the cylinder two (16) is connected to the drive gear column (15). The central control cavity (132) is symmetrically provided with channels on the layered block (133), the sealing block (131) is provided with a temporary storage cavity (134) on the side of the layered block (133), the sealing block (131) is provided with a variable diameter conveying cavity one (135) and a variable diameter conveying cavity two (136), the variable diameter conveying cavity one (135) and the variable diameter conveying cavity two (136) are connected to the top liquid guide plug (18), and each of them is provided with a one-way valve on its connecting pipe. By controlling the stroke of the cylinder two (16) to set the rotation angle of the layered block (133), the effective diameter of the flow channel can be steplessly adjusted to achieve flexible switching from low pressure and large flow to high pressure and small flow. The positioning frame (1) is fixed with a liquid guide box (17) by bolts, and the side connecting pipe of the liquid guide box (17) is connected to the temporary storage cavity (134) inside the sealing block (131).

2. The rapid response capability testing device for high-precision solenoid valves according to claim 1, characterized in that, The positioning frame (1) is equipped with a drive positioning bolt (5) on the top, and a correction block (4) is installed on one side of the transmission platform (2), and the correction block (4) is provided with holes corresponding to the valve body positioning fixture (3) on the transmission platform (2).

3. The rapid response capability testing device for high-precision solenoid valves according to claim 2, characterized in that, The top corner deflection drive frame (6) of the positioning frame (1) consists of an electric push rod and a slider. The micro fiber optic sensing module (7) is mounted on the slider and driven by the electric push rod. The micro fiber optic sensing module (7) includes a fiber optic micro-displacement sensor and a fiber optic demodulator connected to the outside.

4. The rapid response capability testing device for high-precision solenoid valves according to claim 3, characterized in that, The micro fiber optic sensing module (7) has a positioning calibration module 1 (8) on the top of the angle deflection drive frame (6), and a micro strain gauge is provided at the end of the positioning calibration module 2 (9) on the other side of the angle deflection drive frame (6).

5. The rapid response capability testing device for high-precision solenoid valves according to claim 4, characterized in that, The positioning frame (1) is equipped with a fluid dynamic response module (10) on the top corner deflection drive frame (6). The fluid dynamic response module (10) consists of an abutment sleeve and a miniaturized cavity and a high-frequency response pressure sensor installed in the abutment sleeve.

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