A comprehensive detection device and method for a multi-connected electromagnetic valve group

Abstract

The application discloses a kind of comprehensive detection device and method of multi-connected electromagnetic valve group, applied to the detection of multi-connected electromagnetic valve group with each outlet independent of each other through common inlet channel communication, and detection device includes horizontal positioning plate group, first end positioning plate group and second end positioning plate group, through the design of three-way airflow channel and the configuration of switchable first three-way valve group and second three-way valve group, it realizes that positive and negative double airflow direction air tightness comprehensive detection can be completed under the single clamping state of multi-connected electromagnetic valve group, solves the technical problems of single function of traditional detection device, cannot evaluate reverse sealing performance and needs to be repeatedly clamped, resulting in low detection efficiency.

Description

A comprehensive testing device and method for multi-unit solenoid valve groups Technical Field

[0001] This invention relates to the field of solenoid valve testing technology, specifically to a comprehensive testing device and method for multi-unit solenoid valve groups. Background Technology

[0002] In existing technologies, multi-unit solenoid valve assemblies are key fluid control components, and their airtightness directly affects the reliability and safety of the entire system. Currently, testing devices for this type of valve assembly typically involve introducing test gas at a certain pressure into the valve assembly's inlet and observing the pressure change or leakage rate at the downstream outlet to determine the sealing status of the valve core and seat when airflow passes through in the forward direction.

[0003] However, this traditional testing method has significant limitations. It can only effectively evaluate the sealing performance of a solenoid valve under a single airflow direction (i.e., forward flow under design conditions), and cannot simulate and detect the integrity of its sealing structure when airflow passes through the valve assembly in the opposite direction. In practical applications, many solenoid valve assemblies face conditions of bidirectional pressure differential or reverse airflow impact. If the valve assembly experiences sealing failure under reverse airflow, it may lead to system medium backflow, abnormal pressure, or functional malfunction, thereby causing equipment failure or even safety accidents.

[0004] Therefore, relying solely on unidirectional airtightness testing cannot comprehensively evaluate the overall sealing performance of valve assemblies under actual complex operating conditions, leaving potential quality hazards. Furthermore, existing testing devices often have limited functionality, making it difficult to efficiently and accurately perform comprehensive performance tests on multi-unit solenoid valve assemblies, including forward and reverse airtightness. This, to some extent, restricts the improvement of product quality and the optimization of testing efficiency.

[0005] To address this technological gap, there is an urgent need to develop a comprehensive testing device and corresponding method that can accurately detect the airtightness of multi-unit solenoid valve assemblies when airflow passes in both the forward and reverse directions, in order to overcome the shortcomings of existing technologies and ensure the reliability of valve assemblies under bidirectional operating conditions. Summary of the Invention

[0006] To address the problems existing in the prior art, a comprehensive testing device and method for multi-unit solenoid valve groups is provided. Through the design of a three-phase airflow channel and the configuration of a switchable first three-way valve group and a second three-way valve group, the air tightness test in both forward and reverse airflow directions can be completed in a single clamping state of the multi-unit solenoid valve group. This solves the technical problems of traditional testing devices having single functions, being unable to evaluate reverse sealing performance, and requiring repeated clamping, which leads to low testing efficiency.

[0007] To address the problems of existing technologies, this invention provides a comprehensive testing device for multi-unit solenoid valve assemblies. This device is applied to testing multi-unit solenoid valve assemblies where the inlets are connected via a common inlet channel and each outlet is independent. The device includes: a horizontal positioning plate assembly containing a common air passage, connecting air passages communicating with each outlet of the multi-unit solenoid valve assembly, and a first detection air passage communicating with the outside. Each connecting air passage is connected to the common air passage and the first detection air passage via a first three-way valve assembly, allowing the connecting air passage to be selectively connected to either the common air passage or the corresponding first detection air passage. A first pressure sensor is installed at the outer port of each first detection air passage. A first end positioning plate assembly is positioned at one end of the horizontal positioning plate assembly and abuts against... Connected to one end of the multi-solenoid valve assembly, the first end positioning plate assembly is provided with a main air source channel, a first branch air channel connected to the common air intake channel of the multi-solenoid valve assembly, and a second branch air channel connected to the common air channel of the horizontal positioning plate assembly. The main air source channel is connected to the first and second branch air channels through a second three-way valve assembly, so that the main air source channel can be selectively connected to the first branch air channel or to the second branch air channel. The second end positioning plate assembly is located at the other end of the horizontal positioning plate assembly and abuts against the other end of the multi-solenoid valve assembly. The second end positioning plate assembly is provided with a second detection air channel connected to the common air intake channel of the multi-solenoid valve assembly, and a second pressure sensor is provided on the second detection air channel.

[0008] Preferably, the horizontal positioning plate assembly also includes a first mounting groove, which extends radially along the common air passage and is located between the connecting air passage and the first detection air passage; the first three-way valve assembly includes: a first valve stem, which is slidably coaxially disposed in the first mounting groove and has a first position and a second position in the first mounting groove; the first valve stem has a radially penetrating first connecting port and a first connecting groove extending axially therefrom; when the first valve stem moves to the first position, the first connecting port connects the connecting air passage and the first detection air passage; when the first valve stem moves to the second position, the first connecting groove connects the connecting air passage and the common air passage; a first electromagnetic coil, which is fixedly installed on the outside of the horizontal positioning plate assembly, and its output rod is connected to the first valve stem for driving the first valve stem to move between the first position and the second position.

[0009] Preferably, a first return spring is provided between the first valve stem and the bottom of the first mounting groove.

[0010] Preferably, a first sealing ring is also fitted on the first valve stem, and the first sealing ring is located between the first connecting port and the first connecting groove.

[0011] Preferably, the first end positioning plate assembly also has a second mounting groove, which extends radially along the second branch air passage and is located between the main air source passage and the first branch air passage; the second three-way valve assembly includes: a second valve stem, which is slidably coaxially disposed in the second mounting groove and has a first position and a second position in the second mounting groove; the second valve stem has a radially penetrating second connecting port and a second connecting groove extending axially therefrom; when the second valve stem moves to the first position, the second connecting port connects the main air source passage and the first branch air passage; when the second valve stem moves to the second position, the second connecting groove connects the main air source passage and the second branch air passage; a second electromagnetic coil, which is fixedly installed on the outside of the first end positioning plate assembly, and its output rod is connected to the second valve stem for driving the second valve stem to move between the first position and the second position.

[0012] Preferably, a second return spring is provided between the second valve stem and the bottom of the second mounting groove.

[0013] Preferably, a second sealing ring is also fitted on the second valve stem, and the second sealing ring is located between the second connecting port and the second connecting groove.

[0014] Preferably, a clamping cylinder is also provided on the top of the horizontal positioning plate assembly, and the output rod of the clamping cylinder abuts against the top of the multi-solenoid valve assembly with its direction downward.

[0015] Preferably, the distance between the first end positioning plate group and the second end positioning plate group is greater than the length of the multi-solenoid valve group. An abutment cylinder is provided on the outer side of the second end positioning plate group. An abutment cylinder is provided on the output rod of the abutment cylinder, which passes through the second end positioning plate group. The outer port of the abutment cylinder abuts against the common air intake channel port of the multi-solenoid valve group. A connecting hole communicating with the second detection air channel is also provided on the abutment cylinder.

[0016] A comprehensive testing method for multi-unit solenoid valve assemblies, employing a comprehensive testing device for multi-unit solenoid valve assemblies, includes the following steps:

[0017] Step 1: Configure the positive air supply test state, control the first three-way valve group to connect the connecting air passage with the first detection air passage, and at the same time control the second three-way valve group to connect the main air source passage with the first branch air passage.

[0018] Step 2: Inject high-pressure gas into the main gas source channel, so that it flows sequentially through the common air intake channel of the second three-way valve group, the first branch gas channel, and the multi-solenoid valve group, and enters the multi-solenoid valve group.

[0019] Step 3: Sequentially turn the power on and off of each solenoid valve in the multi-solenoid valve group, and use the first pressure sensor to detect the pressure change in the corresponding first detection air passage to determine the airflow conduction status of the multi-solenoid valve group under the action of positive airflow.

[0020] Step 4: Configure the reverse air supply test state, control the first three-way valve group to connect the connecting air passage with the common air passage, and at the same time control the second three-way valve group to connect the main air source passage with the second branch air passage.

[0021] Step 5: Inject high-pressure gas into the main gas source channel, so that it flows sequentially through the second three-way valve group, the second branch gas channel, the common gas channel, the first three-way valve group, and the connecting gas channel, and flows in reverse into the outlet of the multi-solenoid valve group;

[0022] Step six: Sequentially turn the power on and off of each solenoid valve in the multi-solenoid valve group, and use the second pressure sensor to detect the pressure change in the second detection air passage to determine the airflow channel status of the multi-solenoid valve group under the action of reverse airflow.

[0023] The advantages of this application compared to the prior art are:

[0024] This application, through a three-way airflow channel design and a switchable first three-way valve group and second three-way valve group configuration, enables comprehensive airtightness testing in both forward and reverse airflow directions to be completed in a single clamping state of a multi-solenoid valve group. This solves the technical problems of traditional testing devices having single functions, being unable to evaluate reverse sealing performance, and requiring repeated clamping, which leads to low testing efficiency.

[0025] The system utilizes a first three-way valve assembly in the horizontal positioning plate group to flexibly switch between the common air passage and the independent testing air passage for each outlet. This, combined with a second three-way valve assembly in the first end positioning plate group to selectively connect the inlet channel and the common air passage, constructs a complete forward and reverse test airflow path. During forward testing, high-pressure gas flows into the valve assembly from the common inlet channel; during reverse testing, high-pressure gas flows into each outlet from the common air passage. This symmetrical and reversible test structure not only comprehensively evaluates the sealing performance of each solenoid valve under bidirectional pressure differential but also automates and refines the testing process through an integrated pressure sensing system, significantly improving testing efficiency and reliability, and ensuring the safety of the multi-unit solenoid valve assembly under complex operating conditions. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the airflow during forward airflow testing of a comprehensive testing device for a multi-solenoid valve group according to the present invention.

[0027] Figure 2 is a schematic diagram of the airflow during reverse airflow testing of a comprehensive testing device for a multi-solenoid valve group according to the present invention.

[0028] Figure 3 is a perspective view of a comprehensive testing device for a multi-solenoid valve assembly of the present invention installed on a test workbench.

[0029] Figure 4 is a perspective view of a multi-solenoid valve assembly integrated testing device of the present invention from a first perspective.

[0030] Figure 5 is a perspective view of a multi-solenoid valve assembly integrated testing device of the present invention from a second perspective.

[0031] Figure 6 is a front view of a comprehensive testing device for a multi-solenoid valve group according to the present invention.

[0032] Figure 7 is a cross-sectional view at section AA of Figure 6.

[0033] Figure 8 is a sectional view at section BB of Figure 6.

[0034] Figure 9 is a top view of a comprehensive testing device for a multi-solenoid valve assembly according to the present invention.

[0035] Figure 10 is a sectional view at section CC of 9.

[0036] Figure 11 is a schematic diagram of a comprehensive testing device for a multi-solenoid valve assembly and a multi-solenoid valve assembly according to the present invention.

[0037] The diagram is labeled as follows: 1. Multi-unit solenoid valve assembly; 11. Air inlet; 12. Common air inlet channel; 13. Air outlet; 2. Test workbench; 3. Horizontal positioning plate assembly; 31. Common air passage; 32. Connecting air passage; 33. First detection air passage; 41. First three-way valve assembly; 411. First valve stem; 4111. First connecting port; 4112. First connecting groove; 412. First solenoid coil; 413. First return spring; 414. First sealing ring; 42. First pressure sensor; 5. First end positioning plate assembly; 51. Air source. 52. Main channel; 53. First branch airway; 54. Second branch airway; 55. First shut-off valve; 6. Second end positioning plate assembly; 61. Second detection airway; 63. Abutment cylinder; 64. Abutment tube; 641. Connecting hole; 65. Second shut-off valve; 71. Second three-way valve assembly; 711. Second valve stem; 7111. Second connecting port; 7112. Second connecting groove; 712. Second electromagnetic coil; 713. Second return spring; 714. Second sealing ring; 72. Second pressure sensor; 8. Clamping cylinder; 9. Main air source. Detailed Implementation

[0038] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0039] As shown in Figures 1 to 8, a comprehensive testing device for a multi-unit solenoid valve assembly 1 is used to test a multi-unit solenoid valve assembly 1 whose inlet ports 11 are connected through a common inlet channel 12 and whose outlet ports 13 are independent of each other. The device includes:

[0040] The horizontal positioning plate assembly 3 has a common air passage 31, a connecting air passage 32 that is connected to each air outlet 13 of the multi-solenoid valve assembly 1, and a first detection air passage 33 that is connected to the outside. Each connecting air passage 32 is connected to the common air passage 31 and a first detection air passage 33 through a first three-way valve assembly 41, so that the connecting air passage 32 can be selectively connected to the common air passage 31 or to the corresponding first detection air passage 33. A first pressure sensor 42 is installed at the outer port of each first detection air passage 33.

[0041] The first end positioning plate group 5 is disposed at one end of the horizontal positioning plate group 3 and abuts against one end of the multi-solenoid valve group 1. The first end positioning plate group 5 is provided with a main air source channel 51, a first branch air channel 52 connected to the common air intake channel 12 of the multi-solenoid valve group 1, and a second branch air channel 53 connected to the common air channel 31 of the horizontal positioning plate group 3. The main air source channel 51 is connected to the first branch air channel 52 and the second branch air channel 53 through a second three-way valve group 71, so that the main air source channel 51 can be selectively connected to the first branch air channel 52 or to the second branch air channel 53.

[0042] The second end positioning plate group 6 is located at the other end of the horizontal positioning plate group 3 and abuts against the other end of the multi-solenoid valve group 1. The second end positioning plate group 6 is provided with a second detection air passage 61 that communicates with the common air intake passage 12 of the multi-solenoid valve group 1. The second detection air passage 61 is provided with a second pressure sensor 72.

[0043] The device mainly includes a horizontal positioning plate assembly 3, a first end positioning plate assembly 5, and a second end positioning plate assembly 6. The horizontal positioning plate assembly 3 integrates a common air passage 31, multiple connecting air passages 32 corresponding to each air outlet 13 of the multi-stage solenoid valve assembly 1, and multiple first detection air passages 33 connected to the outside. Each connecting air passage 32 is selectively connected to the common air passage 31 or its corresponding first detection air passage 33 via a first three-way valve assembly 41. A high-precision first pressure sensor 42 is installed at the external port of each first detection air passage 33 to monitor the pressure status of each independent air outlet 13.

[0044] The first end positioning plate assembly 5 is located at one end of the horizontal positioning plate assembly 3 and is in close contact with the end of the multi-solenoid valve assembly 1. Internally, it includes a main air source channel 51, a first branch air channel 52 connected to the common air intake channel 12 of the multi-solenoid valve assembly 1, and a second branch air channel 53 connected to the common air channel 31 of the horizontal positioning plate assembly 3. A second three-way valve assembly 71 is installed on the main air source channel 51 to switch the airflow from the main air source 9 to either the first branch air channel 52 or the second branch air channel 53, thereby fundamentally changing the input path of the test airflow.

[0045] The second end positioning plate group 6 is located at the other end of the horizontal positioning plate group 3, and also abuts against the other end of the multi-solenoid valve group 1. It is provided with a second detection air passage 61 that communicates with the common air intake passage 12 of the multi-solenoid valve group 1. A second pressure sensor 72 is installed on the second detection air passage 61 for monitoring the pressure of the common air intake passage 12 in a specific test mode.

[0046] The entire device is mounted on a stable test bench 2. The horizontal positioning plate assembly 3 also integrates electrical connectors to provide controllable on / off electrical signals to each solenoid coil of the multi-solenoid valve assembly 1 during testing. To ensure test safety and precise control, a first shut-off valve 55 for switching the entire gas source is installed on the first end positioning plate assembly 5, and a second shut-off valve 65 for switching the second detection gas passage 61 is installed on the second end positioning plate assembly 6.

[0047] The device coordinates and controls the three-way valve groups and the solenoid valve coils to perform two test states:

[0048] Forward air supply test: In this state, all first three-way valve groups 41 are activated, connecting their respective connecting air passages 32 with the corresponding first detection air passages 33, thereby sealing the connection between the outlet 13 and the common air passage 31. Simultaneously, the second three-way valve group 71 is activated, connecting the main air supply passage 51 with the first branch air passage 52. During the test, high-pressure gas is injected into the main air supply passage 51, and the gas enters the common air intake passage 12 of the multi-solenoid valve group 1 via the first branch air passage 52. By controlling the sequential switching of the solenoid coils on the valve groups through program control and observing the changes in the readings of each first pressure sensor 42, the opening and closing response and airtightness performance of each solenoid valve under forward airflow can be accurately detected.

[0049] Reverse air supply test: In this state, all first three-way valve groups 41 switch, connecting their respective connecting air passages 32 to the common air passage 31. Simultaneously, the second three-way valve group 71 switches, connecting the main air source passage 51 to the second branch air passage 53. During the test, high-pressure gas no longer enters the common air intake passage 12, but instead enters directly into the common air passage 31 of the horizontal positioning plate group 3 via the second branch air passage 53, and flows back into each air outlet 13. At this time, by controlling the on / off state of the solenoid coil and observing the changes in the reading of the second pressure sensor 72 on the second end positioning plate group 6, the sealing performance and airflow passage status of each solenoid valve under reverse airflow can be effectively tested.

[0050] As shown in Figure 7, the horizontal positioning plate assembly 3 also has a first mounting groove, which extends radially along the common air passage 31 and is located between the connecting air passage 32 and the first detection air passage 33; the first three-way valve assembly 41 includes:

[0051] The first valve stem 411 is slidably coaxially disposed in the first mounting groove and has a first position and a second position in the first mounting groove. The first valve stem 411 has a radially penetrating first communication port 4111 and a first communication groove 4112 extending along its axial direction.

[0052] When the first valve stem 411 moves to the first position, the first connecting port 4111 connects the connecting air passage 32 with the first detection air passage 33; when the first valve stem 411 moves to the second position, the first connecting groove 4112 connects the connecting air passage 32 with the common air passage 31.

[0053] The first electromagnetic coil 412 is fixedly installed on the outside of the horizontal positioning plate group 3, and its output rod is connected to the first valve rod 411 to drive the first valve rod 411 to move between the first position and the second position.

[0054] The valve assembly mainly includes a first valve stem 411 and a first electromagnetic coil 412. The first valve stem 411 is slidably coaxially disposed in the first mounting groove, and its stem body is machined with a special flow channel structure: a radially penetrating first connecting port 4111 and a first connecting groove 4112 extending along its axial direction. Through external drive, the first valve stem 411 can have two defined working positions in the mounting groove.

[0055] When a forward air supply test is required, the first electromagnetic coil 412 is energized, driving the first valve stem 411 to move to the first position. In this position, the first connecting port 4111 on the first valve stem 411 is precisely aligned with the connecting air passage 32 and the first detection air passage 33, thereby connecting the two and isolating the passage with the common air passage 31.

[0056] When switching to reverse gas supply testing, the first electromagnetic coil 412 drives the first valve stem 411 to move to the second position. At this time, the first connecting port 4111 is removed, and the first connecting groove 4112 on the first valve stem 411 spans the connecting air passage 32 and the common air passage 31, establishing a connecting bridge between the two, thereby realizing the switching of the air passage.

[0057] The first electromagnetic coil 412 serves as the driving source and is fixedly installed on the outside of the horizontal positioning plate group 3. Its output rod is connected to the built-in first valve rod 411, converting the electrical control signal into the linear displacement of the valve rod, thereby accurately and quickly driving the first valve rod 411 to move between the first position and the second position, completing the automatic switching of the test state.

[0058] As shown in Figure 7, a first return spring 413 is provided between the first valve stem 411 and the bottom of the first mounting groove.

[0059] The first return spring 413 is always in a compressed state, providing a continuous and stable return force to the first valve stem 411 toward its initial default position (e.g., the first position). When the first solenoid coil 412 is de-energized, the first valve stem 411 can automatically, quickly, and accurately return to its initial position under the action of the first return spring 413. This provides a defined fail-safe state for the entire test system, improving the safety and controllability of the device. Simultaneously, the spring force helps overcome friction and sealing resistance during valve stem movement, ensuring smooth and precise switching and effectively eliminating hysteresis that may occur due to component gaps, thereby improving the accuracy and repeatability of air circuit switching. Furthermore, this reset mechanism also serves as an effective supplement to the driving force, working in conjunction with the first solenoid coil 412 to jointly ensure the long-term operational stability of the valve assembly under frequent switching conditions.

[0060] As shown in Figure 7, a first sealing ring 414 is also fitted on the first valve stem 411, and the first sealing ring 414 is located between the first connecting port 4111 and the first connecting groove 4112.

[0061] The first sealing ring 414 dynamically seals the annular gap between the valve stem and the inner wall of the mounting groove. Regardless of whether the first valve stem 411 is in the first or second position, the first sealing ring 414 effectively isolates the connecting air passage 32, the first detection air passage 33, and the common air passage 31, ensuring that airflow can only pass through a preset path, i.e., through the first connecting port 4111 or the first connecting groove 4112. This completely avoids pressure reading distortion or test misjudgment caused by internal leakage, providing high authenticity and accuracy for the data collected by the first pressure sensor 42.

[0062] As shown in Figure 8, the first end positioning plate assembly 5 is further provided with a second mounting groove, which extends radially along the second branch air passage 53 and is located between the main air source passage 51 and the first branch air passage 52; the second three-way valve assembly 71 includes:

[0063] The second valve stem 711 is slidably coaxially disposed in the second mounting groove and has a first position and a second position in the second mounting groove. The second valve stem 711 has a radially through second communication port 7111 and a second communication groove 7112 extending along its axial direction.

[0064] When the second valve stem 711 moves to the first position, the second connecting port 7111 connects the main air supply channel 51 to the first branch air channel 52; when the second valve stem 711 moves to the second position, the second connecting groove 7112 connects the main air supply channel 51 to the second branch air channel 53.

[0065] The second electromagnetic coil 712 is fixedly installed on the outside of the first end positioning plate group 5, and its output rod is connected to the second valve rod 711 to drive the second valve rod 711 to move between the first position and the second position.

[0066] The second three-way valve assembly 71 serves as the main switch for controlling the direction of the test airflow, and its structure and working principle are the same as those of the first three-way valve assembly 41. The core of this valve assembly includes a second valve stem 711 and a second electromagnetic coil 712. The second valve stem 711 is slidably coaxially mounted in the second mounting groove, and its stem body is also machined with a radially penetrating second connecting port 7111 and a second connecting groove 7112 extending axially. Driven externally, the second valve stem 711 has two defined working positions within the mounting groove.

[0067] When the device performs a forward gas supply test, the second electromagnetic coil 712 drives the second valve stem 711 to move to its first position. In this state, the second connection port 7111 accurately connects and connects the main gas source channel 51 with the first branch gas channel 52, allowing the test gas to enter the common air intake channel 12 of the multi-solenoid valve group 1.

[0068] When the device is switched to reverse gas supply test, the second electromagnetic coil 712 drives the second valve stem 711 to move to its second position. At this time, the second connecting port 7111 is removed, and the second connecting groove 7112 spans the main gas source channel 51 and the second branch gas channel 53, establishing a connecting bridge between the two, thereby guiding the test gas to the common gas channel 31 of the horizontal positioning plate group 3.

[0069] The second electromagnetic coil 712 serves as a driving source and is fixedly installed on the outside of the first end positioning plate group 5. Its output rod is directly connected to the second valve rod 711. By receiving electrical control signals, it precisely drives the second valve rod 711 to move between two working positions, thereby realizing the global switching of the entire device's test mode.

[0070] As shown in Figure 8, a second return spring 713 is provided between the second valve stem 711 and the bottom of the second mounting groove.

[0071] The principle and function of the second return spring 713 are the same as those of the first return spring 413. In the event of an unexpected power outage, the spring force can drive the second valve stem 711 to automatically return to the default safe position (such as cutting off the gas supply or connecting the forward test pipeline). This not only improves the safety performance of the entire testing device and avoids situations where the test is interrupted or the gas path status is unclear, but also ensures that the valve stem can quickly and accurately disengage when the electromagnetic coil drive ends, complementing the driving force of the coil, making the switching action more decisive and timely, and further enhancing the long-term stability and repeatability of the gas path switching.

[0072] As shown in Figure 8, a second sealing ring 714 is also fitted on the second valve stem 711. The second sealing ring 714 is located between the second connecting port 7111 and the second connecting groove 7112.

[0073] The second sealing ring 714 forms a dynamic seal for the second three-way valve assembly 71, ensuring that adjacent air passages are effectively isolated regardless of where the second valve stem 711 is during the switching process or when it is stable in a certain working position, guaranteeing that the test airflow strictly follows the preset path. This is crucial for maintaining the stability and accuracy of the entire testing system, especially the pressure at the air source input end, eliminating interference with test results caused by internal leakage of the valve assembly itself, and providing another solid guarantee for the accuracy of forward and reverse testing modes.

[0074] As shown in Figure 8, a clamping cylinder 8 is also provided on the top of the horizontal positioning plate group 3, and the output rod of the clamping cylinder 8 is pressed downward against the top of the multi-solenoid valve group 1.

[0075] During operation, the clamping cylinder 8 outputs a controllable downward force, stably pressing the entire valve assembly against the mounting plane of the horizontal positioning plate assembly 3. This force is simultaneously transmitted through the valve assembly housing, ensuring that both ends of the valve assembly are tightly pressed against the mating surfaces of the first end positioning plate assembly 5 and the second end positioning plate assembly 6, respectively. This top-down active clamping mechanism effectively eliminates sealing problems that may be caused by machining tolerances or assembly gaps, creating a uniform and stable sealing pressure between the components, thereby establishing a highly reliable sealing environment within the test circuit.

[0076] As shown in Figures 9 to 11, the distance between the first end positioning plate group 5 and the second end positioning plate group 6 is greater than the length of the multi-solenoid valve group 1. An abutting cylinder 63 is provided on the outer side of the second end positioning plate group 6. An abutting cylinder 64 is provided on the output rod of the abutting cylinder 63, which penetrates the second end positioning plate group 6. The outer port of the abutting cylinder 64 abuts against the port of the common air intake channel 12 of the multi-solenoid valve group 1. A connecting hole 641 communicating with the second detection air channel 61 is also provided on the abutting cylinder 64.

[0077] To enable the rapid clamping and automatic sealing connection of the multi-solenoid valve assembly 1, the device has been specifically designed with the spacing between the first end positioning plate assembly 5 and the second end positioning plate assembly 6 made slightly larger than the total length of the multi-solenoid valve assembly 1, providing the necessary travel space for lateral clamping.

[0078] An abutment cylinder 63 is provided on the outer side of the second end positioning plate assembly 6. An abutment cylinder 64 is fixedly connected to the output rod of the cylinder. The abutment cylinder 64 passes through the second end positioning plate assembly 6, and its outer port is designed to precisely abut against the common air intake channel 12 port of the multi-solenoid valve assembly 1. The abutment cylinder 64 is also provided with a radial connecting hole 641, which communicates with the second detection air passage 61 inside the second end positioning plate assembly 6.

[0079] During operation, after the valve assembly is placed on the horizontal positioning plate group 3, the abutment cylinder 63 actuates, pushing the abutment cylinder 64 forward until its outer port is tightly pressed into the common air intake channel 12 port of the valve assembly, forming a reliable end face seal. This action simultaneously performs two key functions: first, in the axial direction, it works in conjunction with the top clamping cylinder 8 to firmly clamp the valve assembly between the first and second end positioning plate groups 6; second, through the connecting hole 641 on the abutment cylinder 64, it automatically and precisely aligns the second detection air passage 61 with the common air intake channel 12 of the valve assembly, establishing the key detection air path required for reverse testing.

[0080] A comprehensive testing method for a multi-unit solenoid valve assembly 1, employing a comprehensive testing device for the multi-unit solenoid valve assembly 1, includes the following steps:

[0081] Step 1: Configure the positive air supply test state, control the first three-way valve group 41 to activate, so that the connecting air passage 32 is connected to the first detection air passage 33, and at the same time control the second three-way valve group 71 to activate, so that the main air source passage 51 is connected to the first branch air passage 52.

[0082] Step 2: Inject high-pressure gas into the main gas supply channel 51, so that it flows sequentially through the common air intake channel 12 of the second three-way valve group 71, the first branch gas channel 52, and the multi-solenoid valve group 1, and enters the multi-solenoid valve group 1.

[0083] Step 3: Sequentially turn the power on and off of each solenoid valve in the multi-solenoid valve group 1, and use the first pressure sensor 42 to detect the pressure change in the corresponding first detection air passage 33 to determine the airflow conduction status of the multi-solenoid valve group 1 under the action of positive airflow.

[0084] Step 4: Configure the reverse air supply test state, control the first three-way valve group 41 to activate, so that the connecting air passage 32 is connected to the common air passage 31, and at the same time control the second three-way valve group 71 to activate, so that the main air source passage 51 is connected to the second branch air passage 53.

[0085] Step 5: Inject high-pressure gas into the main gas supply channel 51, so that it flows sequentially through the second three-way valve group 71, the second branch gas channel 53, the common gas channel 31, the first three-way valve group 41, and the connecting gas channel 32, and flows in reverse into the outlet 13 of the multi-solenoid valve group 1.

[0086] Step six: Sequentially turn the power on and off of each solenoid valve in the multi-solenoid valve group 1, and use the second pressure sensor 72 to detect the pressure change in the second detection air passage 61 to determine the airflow channel status of the multi-solenoid valve group 1 under the action of reverse airflow.

[0087] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A comprehensive testing device for multi-unit solenoid valve assemblies, used for testing multi-unit solenoid valve assemblies where the air inlets are connected through a common air inlet channel and each air outlet is independent, characterized in that, include: The horizontal positioning plate assembly includes a common air passage, connecting air passages that communicate with the air outlets of each multi-solenoid valve assembly, and a first detection air passage that communicates with the outside. Each connecting air passage is connected to the common air passage and a first detection air passage via a first three-way valve assembly, allowing the connecting air passage to be selectively connected to the common air passage or to the corresponding first detection air passage. A first pressure sensor is installed at the outer port of each first detection air passage. The horizontal positioning plate assembly also has a first mounting groove, which extends radially along the common air passage and is located between the connecting air passage and the first detection air passage. The first three-way valve assembly includes a first valve stem, which is slidably coaxially disposed in the first mounting groove and has a first position and a second position in the first mounting groove. The first valve stem has a radially penetrating first connecting port and an axially extending first connecting groove on its stem body. When the first valve stem moves to the first position, the first connecting port connects the connecting air passage to the first detection air passage. When the first valve stem moves to the second position, the first connecting groove connects the connecting air passage to the common air passage. A first electromagnetic coil is fixedly installed on the outside of the horizontal positioning plate assembly, and its output rod is connected to the first valve stem to drive the first valve stem to move between the first and second positions. A first end positioning plate assembly is set at one end of the horizontal positioning plate assembly and abuts against one end of the multi-solenoid valve assembly. The first end positioning plate assembly has a main air source passage, a first branch air passage connected to the common air intake passage of the multi-solenoid valve assembly, and a connection to the horizontal positioning plate assembly. The common air passage of the positioning plate assembly is connected to the second branch air passage. The main air source passage is connected to the first and second branch air passages through a second three-way valve assembly, allowing the main air source passage to be selectively connected to either the first or second branch air passage. The first end positioning plate assembly also has a second mounting groove extending radially along the second branch air passage and located between the main air source passage and the first branch air passage. The second three-way valve assembly includes a second valve stem, slidably coaxially disposed within the second mounting groove, having a first position and a second position within the groove. The second valve stem has a radially penetrating second connecting port and a second connecting groove extending axially. When the second valve stem moves to the first position, the second connecting port... The inlet connects the main air supply channel to the first branch air channel; when the second valve stem moves to the second position, the second connecting groove connects the main air supply channel to the second branch air channel; the second electromagnetic coil is fixedly installed on the outside of the first end positioning plate group, and its output rod is connected to the second valve stem to drive the second valve stem to move between the first position and the second position; the second end positioning plate group is set at the other end of the horizontal positioning plate group and abuts against the other end of the multi-solenoid valve group, and the second end positioning plate group is provided with a second detection air channel that communicates with the common air intake channel of the multi-solenoid valve group, and a second pressure sensor is provided on the second detection air channel; the first valve stem is also fitted with a first sealing ring, which is located between the first connecting port and the first connecting groove;A second sealing ring is also fitted onto the second valve stem, located between the second connecting port and the second connecting groove; a clamping cylinder is also provided at the top of the horizontal positioning plate assembly, with the output rod of the clamping cylinder pointing downwards and abutting against the top of the multi-solenoid valve assembly; the distance between the first end positioning plate assembly and the second end positioning plate assembly is greater than the length of the multi-solenoid valve assembly; an abutting cylinder is provided on the outer side of the second end positioning plate assembly, and an abutting cylinder is provided on the output rod of the abutting cylinder, penetrating the second end positioning plate assembly; the outer port of the abutting cylinder abuts against the common air inlet port of the multi-solenoid valve assembly, and a connecting hole communicating with the second detection air passage is also provided on the abutting cylinder.

2. The comprehensive testing device for a multi-unit solenoid valve assembly according to claim 1, characterized in that, A first reset spring is provided between the first valve stem and the bottom of the first mounting groove.

3. The comprehensive testing device for a multi-unit solenoid valve assembly according to claim 1, characterized in that, A second return spring is provided between the second valve stem and the bottom of the second mounting groove.

4. A comprehensive testing method for multi-unit solenoid valve assemblies, employing the comprehensive testing device for multi-unit solenoid valve assemblies as described in claim 1, characterized in that, Includes the following steps: Step 1: Configure the forward air supply test state, control the first three-way valve group to connect the connecting air passage with the first detection air passage, and simultaneously control the second three-way valve group to connect the main air source passage with the first branch air passage; Step 2: Inject high-pressure gas into the main air source passage, allowing it to flow sequentially through the common air intake passage of the second three-way valve group, the first branch air passage, and the multi-solenoid valve group, and then into the multi-solenoid valve group; Step 3: Sequentially turn the power on and off of each solenoid valve in the multi-solenoid valve group, and use the first pressure sensor to detect the pressure change in the corresponding first detection air passage to determine the airflow conduction status of the multi-solenoid valve group under the action of forward airflow; Fourth, configure the reverse air supply test state, control the first three-way valve group to connect the connecting air passage with the common air passage, and simultaneously control the second three-way valve group to connect the main air source passage with the second branch air passage; Fifth, inject high-pressure gas into the main air source passage, so that it flows sequentially through the second three-way valve group, the second branch air passage, the common air passage, the first three-way valve group, and the connecting air passage, and flows in reverse into the outlet of the multi-solenoid valve group; Sixth, sequentially turn the power on and off on each solenoid valve in the multi-solenoid valve group, and use the second pressure sensor to detect the pressure change in the second detection air passage to determine the airflow channel status of the multi-solenoid valve group under the action of reverse airflow.

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