Electromagnetic valve air tightness test tool

Abstract

The utility model relates to a kind of electromagnetic valve airtightness test tool, including multiple valve groups, valve group includes four electromagnetic valves and a airflow distributor, four electromagnetic valves are connected gas source respectively through airflow distributor, electromagnetic valve is connected controller by driving unit, every three electromagnetic valves take one as A port output, one as P port output, one as R port output to form a detection module, detection module is provided with joint mounting plate, detection module is provided with electronic barometer, three valve groups are respectively provided with barometer, pressure regulating valve is provided between gas source and airflow distributor, process switch is set to corresponding detection module, process switch is connected the input end of controller, electronic barometer and barometer are electrically connected with controller;It also includes shell, electromagnetic valve inspection valve seat and quick clamping assembly are set in the front end of shell.The utility model sets up multiple detection modules to detect multiple measured electromagnetic valves simultaneously, improves detection efficiency and accuracy in combination with controller.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve testing technology, specifically to a solenoid valve airtightness testing fixture. Background Technology

[0002] When purchasing large quantities of LD solenoid valves, metal solenoid valves, CKD two-way solenoid valves, and CKD three-way solenoid valves, quality inspection is required before they are put into storage.

[0003] The current inspection method uses manual parallel pressure gauges for testing, which can only be connected and disassembled one by one. This is inefficient, time-consuming and labor-intensive. In addition, manual fatigue can easily occur during the inspection of a large number of solenoid valves, which can lead to errors in manual connection and misjudgment of air leakage.

[0004] Therefore, there is a need for an airtightness testing fixture that can test multiple solenoid valves at once and can perform machine testing. Summary of the Invention

[0005] To address the problems of low efficiency and reliance on manual judgment in existing airtightness testing equipment, this invention proposes a solenoid valve airtightness testing fixture. This invention sets up multiple testing modules to simultaneously test multiple solenoid valves under test, and combines a controller to improve testing efficiency and accuracy.

[0006] To achieve the above objectives, this utility model proposes a solenoid valve airtightness testing fixture, which includes a controller, an air source, a power supply, and a drive module. The valve group is connected to the power supply through the drive module. The controller is used to control the power supply and de-energize the drive module. The fixture includes multiple valve groups, each valve group consisting of four solenoid valves and an airflow distributor. The four solenoid valves are respectively connected to the air source through the airflow distributor. The solenoid valves are connected to the controller through the drive unit. Every three solenoid valves are used as one A port output, one as a P port output, and one as an R port output to form a testing module. The testing module is equipped with a connector mounting plate and an electronic barometer. Each of the three valve groups is equipped with a pressure gauge. A pressure regulating valve is installed between the air source and the airflow distributor. A flow switch is installed corresponding to the testing module. The flow switch is connected to the input terminal of the controller. The electronic barometer and the pressure gauge are electrically connected to the controller. It also includes a housing, which is L-shaped, with an operation panel at the upper end of the housing and a solenoid valve inspection seat and a quick clamping assembly at the front end of the housing.

[0007] Furthermore, the housing is a hollow structure, and multiple valve groups, power supplies and controllers are fixedly installed inside the housing. The operation panel has mounting holes corresponding to the pressure gauge, pressure regulating valve, electronic pressure gauge and process switch. A connector mounting plate is provided at the intersection of the horizontal and vertical sections of the shell. The connector mounting plate is detachably connected to the shell and includes a frame and an interface embedded in the frame.

[0008] The hollow L-shaped housing integrates and houses core components such as valve assemblies and power supplies, reducing external interference and improving equipment stability. The control panel features a centralized arrangement of pressure gauges and pressure regulating valves for easy operation. The detachable connector mounting plate integrates interfaces through the frame, facilitating connection with the solenoid valve under test.

[0009] Furthermore, the solenoid valve inspection seat has a square structure, and the solenoid valve inspection seats are arranged in a straight line at equal intervals corresponding to the interface. Multiple solenoid valve inspection seats are provided with a base, and the base has a U-shaped structure. The upper end face of the base is fixed to the solenoid valve inspection seat, and the lower end face of the base is fixed to the housing.

[0010] Furthermore, the quick-clamping assembly includes a first clamping component that mates with the solenoid valve test seats arranged in a row. The first clamping component includes a bracket, which is U-shaped. A vent pipe is provided at the upper end of the bracket corresponding to the detection module. The tail end of the vent pipe passes through the top end of the bracket and is connected to a quick-clamping fixture. The quick-clamping fixture is fixed to the bracket. An insert rod is provided between the two quick-clamping fixtures. The insert rod is inserted and fixed to the housing. The end of the insert rod is stepped cylindrical. The insert rod contacts the upper end of the bracket downwards to limit the bracket.

[0011] The first clamping component has a simple Z-shaped bracket structure. When used with quick-clamping fixtures, it can quickly clamp the LD solenoid valve and WED solenoid valve without complicated locking steps. The insertion rod achieves bracket positioning only through insertion and stepped limit. It can be fixed by simply inserting it during installation without tools, making it suitable for batch rapid testing needs.

[0012] Furthermore, the solenoid valve inspection seat has a circular structure, and the number of solenoid valve inspection seats corresponds one-to-one with the detection module. The inner wall of the solenoid valve inspection seat is threaded, and the solenoid valve inspection seat is fixed to the housing by bolts. The valve seats of the solenoid valve are arranged in a rectangular pattern along the corners of the transverse section of the housing.

[0013] Furthermore, the quick-clamping assembly includes a second clamping assembly that mates with the solenoid valve inspection seats arranged in a rectangular pattern. The second clamping assembly includes an upper part, a left part, and a right part. The upper part has an inverted U-shaped structure. A vent pipe is provided on the transverse section of the upper part. The rod part of the vent pipe faces downward and is aligned with the solenoid valve inspection seat. A quick-clamping fixture is connected to the vent pipe. The quick-clamping fixture is fixed to the upper part. A flange is provided at the bottom end of the upper part. A straight hole is opened on the flange. The upper part is fixed to the housing by bolts. The left and right sides are two mirror-shaped structures. The upper surfaces of the left and right sides are respectively provided with two mirror-symmetrical vent pipes. The vent pipes are connected to quick-clamp fixtures, which are fixed to the left and right sides respectively. The lower ends of the left and right sides are provided with straight holes. The left and right sides are fixed to the shell by bolts.

[0014] The upper part of the second clamping component adopts a simple U-shape, while the left and right parts have a Z-shaped structure, corresponding to the rectangular arrangement of the CKD solenoid valve. The quick-clamp tool can directly snap the valve body together. The flange and the straight hole can be quickly fixed to the component with bolts without fine adjustment, which solves the problem of complicated operation when clamping multiple ports of CKD solenoid valves, simplifies the clamping steps, and improves installation efficiency.

[0015] Furthermore, a power switch is provided between the power supply and the drive module, and the power switch is fixed on the side wall of the housing; It also includes process indicator light groups, the number of which corresponds one-to-one with the detection modules. Each process indicator light group includes four LEDs of the same color and one LED of a different color. The process indicator light group is electrically connected to the controller, and mounting holes are provided on the housing for four LEDs of the same color and one LED of a different color.

[0016] The process indicator light group uses four LEDs of the same color and one LED of a different color, each corresponding to a detection module, to display in real time whether the various sealing tests of the solenoid valve under test are qualified. Operators can quickly identify product fault points, reduce judgment time, and improve detection efficiency and accuracy.

[0017] The beneficial effects of this utility model through the above technical solution are as follows: This utility model improves testing efficiency. It employs a parallel testing design with multiple testing modules, establishing at least four independent testing stations via an airflow distributor and a three-port valve assembly. This allows for simultaneous airtightness testing of multiple solenoid valves, significantly improving batch testing efficiency. Dedicated quick-clamping components are provided for different types of solenoid valves. The first clamping component for LD and WED solenoid valves utilizes a U-shaped bracket and insert rod for positioning, while the second clamping component for CKD solenoid valves secures them from multiple positions. All of this eliminates the need for complex tools and precise adjustments, achieving rapid clamping and positioning, shortening the preparation time for testing a single device, and further improving overall testing efficiency.

[0018] Compared to manual inspection, this utility model offers higher detection accuracy. It constructs an automated intelligent inspection system that uses a controller, electronic barometer, and pressure gauge to form a closed-loop control system, automatically collecting air pressure data and determining airtightness, completely replacing manual judgment.

[0019] This invention provides three utility models for matching exclusive quick-clamping components for different types of solenoid valves. The first clamping component for LD and WED solenoid valves uses a Z-shaped bracket and a plug rod for limiting the position. The second clamping component for CKD solenoid valves uses a second clamping component to fix the CKD solenoid valve from multiple positions, enabling the testing of different types of solenoid valves. Attached Figure Description

[0020] Figure 1 This is one of the structural schematic diagrams of a solenoid valve airtightness testing fixture according to this utility model; Figure 2 This is the second schematic diagram of the structure of a solenoid valve airtightness testing fixture according to the present invention; Figure 3 This is the third schematic diagram of the structure of a solenoid valve airtightness testing fixture according to this utility model; Figure 4 This is the fourth schematic diagram of the structure of a solenoid valve airtightness testing fixture according to this utility model; Figure 5 This is a schematic diagram of the air circuit of a solenoid valve airtightness testing fixture according to the present invention. Figure 6 This is a circuit diagram of a solenoid valve airtightness testing fixture according to the present invention.

[0021] Reference numerals: 1 is the controller, 2 is the air source, 4 is the solenoid valve, 5 is the connector mounting plate, 6 is the electronic barometer, 7 is the air pressure gauge, 8 is the pressure regulating valve, 9 is the process switch, 10 is the housing, 11 is the operation panel, 12 is the solenoid valve test valve seat, 13 is the quick clamping assembly, 14 is the base, 15 is the bracket, 16 is the insertion rod, 17 is the upper part, 18 is the left part, 19 is the right part, 20 is the power switch, and 21 is the process indicator light group. Detailed Implementation

[0022] Example 1 like Figures 1-6 As shown, a solenoid valve airtightness testing fixture is provided, which includes a controller 1, an air source 2, a power supply, and a drive module. The valve group is connected to the power supply through the drive module. The controller 1 is used to control the power supply of the drive module. It includes multiple valve groups, each valve group including four solenoid valves 4 and an airflow distributor. The four solenoid valves 4 are respectively connected to the air source 2 through the airflow distributor. The solenoid valves 4 are connected to the controller 1 through the drive unit. Every three solenoid valves 4 are used as one A port output, one as a P port output, and one as an R port output to form a detection module. The detection module is provided with a connector mounting plate 5 and an electronic barometer 6. The three valve groups are respectively provided with pressure gauges 7. A pressure regulating valve 8 is provided between the air source 2 and the airflow distributor. A flow switch 9 is provided corresponding to the detection module. The flow switch 9 is connected to the input terminal of the controller 1. The electronic barometer 6 and the pressure gauges 7 are electrically connected to the controller 1. It also includes a housing 10, which is L-shaped. An operation panel 11 is provided at the upper end of the housing 10, and a solenoid valve inspection seat 12 and a quick clamping assembly 13 are provided at the front end of the housing 10.

[0023] The housing 10 is a hollow structure, and multiple valve groups, power supply and controller 1 are fixedly installed inside the housing 10. The operation panel 11 has mounting holes corresponding to the pressure gauge 7, pressure regulating valve 8, electronic pressure gauge 6 and process switch 9. A connector mounting plate 5 is provided at the intersection of the horizontal and vertical sections of the housing 10. The connector mounting plate 5 is detachably connected to the housing 10. The connector mounting plate 5 includes a frame and an interface embedded in the frame.

[0024] The solenoid valve inspection seat 12 has a square structure. The solenoid valve inspection seats 12 are arranged in a straight line at equal intervals corresponding to the interface. Multiple solenoid valve inspection seats 12 are provided with a base 14. The base 14 has a U-shaped structure. The upper end face of the base 14 is fixed to the solenoid valve inspection seat 12, and the lower end face of the base 14 is fixed to the housing 10.

[0025] The quick clamping assembly 13 includes a first clamping assembly that cooperates with the linearly arranged solenoid valve inspection valve seats 12. The first clamping assembly includes a bracket 15, which is U-shaped. A vent pipe is provided at the upper end of the bracket 15 corresponding to the detection module. The tail end of the vent pipe passes through the top end of the bracket 15 and is connected to a quick clamping fixture. The quick clamping fixture is fixed to the bracket 15. An insertion rod 16 is provided between the two quick clamping fixtures. The insertion rod 16 is inserted and fixed to the housing 10. The end of the insertion rod 16 is a stepped cylindrical shape. The insertion rod 16 contacts the upper end of the bracket 15 downwards to limit the bracket 15.

[0026] The solenoid valve test seat 12 has a circular structure. The number of solenoid valve test seats 12 corresponds one-to-one with the detection module. The inner wall of the solenoid valve test seat 12 is threaded. The solenoid valve test seat 12 is fixed to the housing 10 by bolts. The solenoid valve test valve seat 12 is arranged in a rectangular pattern along the corners of the transverse section of the housing 10.

[0027] The quick clamping assembly 13 includes a second clamping assembly that cooperates with the solenoid valve inspection valve seats 12 arranged in a rectangular shape. The second clamping assembly includes an upper part 17, a left part 18, and a right part 19. The upper part 17 has an inverted U-shaped structure. A vent pipe is provided on the horizontal section of the upper part 17. The rod part of the vent pipe faces downward and is aligned with the vent pipe of the solenoid valve inspection valve seat 12. A quick clamping fixture is connected to the vent pipe. The quick clamping fixture is fixed to the upper part 17. A flange is provided at the bottom end of the upper part 17. A straight hole is opened on the flange. The upper part 17 is fixed to the housing 10 by bolts. The left part 18 and the right part 19 are two mirror-shaped structures. The upper end face of the left part 18 and the right part 19 is provided with two mirror-symmetrical vent pipes. The vent pipes are connected to quick-clamp fixtures, which are fixed to the left part 18 and the right part 19 respectively. The lower end of the left part 18 and the right part 19 is provided with a straight hole. The left part 18 and the right part 19 are fixed to the housing 10 by bolts.

[0028] A power switch 20 is provided between the power supply and the drive module, and the power switch 20 is fixed on the side wall of the housing 10. It also includes a process indicator light group 21, the number of which corresponds to the detection module. The process indicator light group 21 includes four LEDs of the same color and one LED of a different color. The process indicator light group 21 is electrically connected to the controller 1, and mounting holes are provided on the housing 10 for four LEDs of the same color and one LED of a different color.

[0029] In this embodiment, the controller uses an STM32 microcontroller, the drive module uses a transistor drive circuit, and the pressure regulating valve 8 includes two valves with different ranges: one for LD solenoid valve detection and the other for CKD solenoid valve detection. The pressure gauge 7 and the electronic pressure gauge 6 are connected to the STM32 microcontroller via an AD module, and the flow switch 9 is a push-button switch.

[0030] In this embodiment, 16 solenoid valves 4 are used. Twelve of the solenoid valves 4 form four detection modules, each existing independently, while the remaining four solenoid valves 4 are used for venting. The number of components corresponding to the number of detection modules is also four. The operation panel displays the readings of the process indicator light group 21, the pressure gauge 7, and the electronic barometer 6.

[0031] When operating, turn on the power switch 20. At this time, the controller 1 (STM32 microcontroller) initializes. According to the type of solenoid valve to be tested (LD, WED or CKD), select the pressure regulating valve 8 with the corresponding range. If testing LD solenoid valve and WED solenoid valve, select the pressure regulating valve that is suitable for their pressure requirements; if testing CKD solenoid valve, switch to the pressure regulating valve with another range.

[0032] (Both the WED and LD solenoid valves use the first clamping assembly. The WED solenoid valve will not be described in detail hereafter; only the LD solenoid valve will be used.) For the LD solenoid valve, align it with the square solenoid valve inspection seat 12 arranged in a row at the front end of the bracket 15. With the stable support of the base 14, make the solenoid valve interface accurately connect with the interface on the connector mounting plate 5. Then, operate the first clamping component to align the bracket 15 with the solenoid valve position, insert the insert rod 16 to realize the bracket 15 limit and fixation, and quickly fasten the LD solenoid valve with the quick clamp tool. Connect the LD solenoid valve with the special valve seat of the LD solenoid valve to the air connector on the connector mounting plate 5.

[0033] The operator checks the reading of the pressure gauge 7 through the control panel 11, rotates the selected pressure regulating valve 8 to adjust the air pressure to the standard pressure value required by the solenoid valve to be tested, and observes the change of the pressure gauge 7 value in real time during the adjustment process until the set value is reached.

[0034] When the corresponding detection module's process switch 9 (button switch) is pressed, the controller 1 receives the trigger signal and controls the corresponding solenoid valve 4 to operate through the drive module (transistor drive circuit). The gas source 2 distributes the gas evenly to the gas path of each detection module through the airflow distributor. The electronic barometer 6 collects the gas path pressure data in real time and transmits it to the controller 1 through the AD module. The operator can view the real-time readings through the operation panel 11.

[0035] The controller 1 continuously monitors pressure changes and completes the following tests by repeatedly controlling the on and off of the solenoid valve in the detection module: the sealing test between port A and port P, the sealing test between port A and port R, the reverse pressure resistance test of port P, and the reverse pressure resistance test of port R. In each of the four tests, the controller 1 compares the detection value of the electronic barometer 6 with the set threshold. If the deviation is within the set value range, it is considered qualified.

[0036] Four LEDs of the same color are green, and LEDs of different colors are red. If any component fails, controller 1 controls the green LED to light up; if any component fails, controller 1 controls the red LED to light up. For example, if the connection between port A and port P is not properly sealed, the first green LED will not light up, but the red LED will light up. Operators can quickly identify the fault point using the indicator light combination.

[0037] After recording the test results, release the quick-clamping fixture of the quick-clamping assembly 13, remove the solenoid valve that has been tested, and after all tests are completed, turn off the power switch 20 to disconnect the power.

[0038] Example 2 Based on the solenoid valve airtightness testing fixture and testing process of Example 1, the installation of CKD solenoid valve before testing is described.

[0039] During installation, for the CKD solenoid valve, align it with the annular solenoid valve inspection seat 12 arranged in a rectangular pattern on the side corners of the transverse section of the housing 10. Fix the solenoid valve inspection seat 12 to the housing 10 with bolts. Then operate the second clamping assembly to align the upper part 17, the left part 18, and the right part 19 with the corresponding positions of the CKD solenoid valve. Use the slotted hole on the flange to fix the assembly with bolts. The quick clamp tool directly snaps into the valve body. Connect the CKD solenoid valve special seat to the vent connector on the connector mounting plate 5.

[0040] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A solenoid valve airtightness testing fixture, comprising multiple valve groups, and equipped with a controller (1), an air source (2), a power supply, and a drive module, wherein the valve groups are connected to the power supply through the drive module, and the controller (1) is used to control the power supply to and from the drive module, characterized in that, The valve group includes four solenoid valves (4) and an airflow distributor. The four solenoid valves (4) are connected to the air source (2) through the airflow distributor. The solenoid valves (4) are connected to the controller (1) through the drive unit. Every three solenoid valves (4) are used as A port output, P port output and R port output to form a detection module. The detection module is equipped with a connector mounting plate (5) and an electronic barometer (6). The three valve groups are equipped with barometers (7). A pressure regulating valve (8) is set between the air source (2) and the airflow distributor. A flow switch (9) is set for the corresponding detection module. The flow switch (9) is connected to the input terminal of the controller (1). The electronic barometer (6) and the barometer (7) are electrically connected to the controller (1). It also includes a housing (10), which is L-shaped. An operation panel (11) is provided at the upper end of the housing (10), and a solenoid valve inspection seat (12) and a quick clamping assembly (13) are provided at the front end of the housing (10).

2. The solenoid valve airtightness testing fixture according to claim 1, characterized in that, The housing (10) is a hollow structure. Multiple valve groups, power supply and controller (1) are fixedly installed inside the housing (10). The operation panel (11) has mounting holes for the barometer (7), pressure regulating valve (8), electronic barometer (6) and process switch (9). A connector mounting plate (5) is provided at the intersection of the horizontal and vertical sections of the housing (10). The connector mounting plate (5) and the housing (10) are detachably connected. The connector mounting plate (5) includes a frame and an interface embedded in the frame.

3. The solenoid valve airtightness testing fixture according to claim 2, characterized in that, The solenoid valve inspection seat (12) is square in shape. The solenoid valve inspection seats (12) are arranged in a line at equal intervals corresponding to the interface. Multiple solenoid valve inspection seats (12) are provided with a base (14). The base (14) is U-shaped. The upper end face of the base (14) is fixed to the solenoid valve inspection seat (12), and the lower end face of the base (14) is fixed to the housing (10).

4. The solenoid valve airtightness testing fixture according to claim 3, characterized in that, The quick clamping assembly (13) includes a first clamping assembly that cooperates with the line-arranged solenoid valve inspection valve seats (12). The first clamping assembly includes a bracket (15), which is shaped like a "Z". A vent pipe is provided at the upper end of the bracket (15) corresponding to the detection module. The tail of the vent pipe passes through the top of the bracket (15) and is connected to a quick clamping fixture. The quick clamping fixture is fixed to the bracket (15). A plug rod (16) is provided between the two quick clamping fixtures. The plug rod (16) is inserted and fixed to the housing (10). The end of the plug rod (16) is a stepped cylindrical shape. The plug rod (16) contacts the upper end of the bracket (15) downwards to limit the bracket (15).

5. The solenoid valve airtightness testing fixture according to claim 1, characterized in that, The solenoid valve test seat (12) is a ring-shaped structure. The number of solenoid valve test seats (12) corresponds to the number of test modules. The inner wall of the solenoid valve test seat (12) is threaded. The solenoid valve test seat (12) is fixed to the housing (10) by bolts. The solenoid valve test valve seat (12) is arranged in a rectangular pattern along the corners of the transverse section of the housing (10).

6. The solenoid valve airtightness testing fixture according to claim 5, characterized in that, The quick clamping assembly (13) includes a second clamping assembly that cooperates with the solenoid valve inspection valve seat (12) arranged in a rectangular shape. The second clamping assembly includes an upper part (17), a left part (18), and a right part (19). The upper part (17) has an inverted U-shaped structure. A vent pipe is provided on the transverse section of the upper part (17). The rod of the vent pipe is aligned with the solenoid valve inspection valve seat (12) with the vent pipe connected to a quick clamping fixture. The quick clamping fixture is fixed to the upper part (17). A flange is provided at the bottom of the upper part (17). A straight hole is opened on the flange. The upper part (17) is fixed to the housing (10) by bolts. The left (18) and right (19) are two mirror-shaped structures. The upper surfaces of the left (18) and right (19) are respectively provided with two mirror-symmetrical vent pipes. The vent pipes are connected to quick-clamp fixtures, which are fixed to the left (18) and right (19) respectively. The lower ends of the left (18) and right (19) are provided with straight holes. The left (18) and right (19) are fixed to the shell (10) by bolts.

7. The solenoid valve airtightness testing fixture according to claim 2, characterized in that, A power switch (20) is provided between the power supply and the drive module, and the power switch (20) is fixed on the side wall of the housing (10); It also includes process indicator light groups (21), the number of which corresponds one-to-one with the detection modules. Each process indicator light group (21) includes four LEDs of the same color and one LED of a different color. The process indicator light group (21) is electrically connected to the controller (1), and four LEDs of the same color and one LED of a different color are provided with mounting holes on the housing (10).

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