Actuator air tightness detection device

Abstract

The actuator air tightness detection device comprises an air tightness detector and a base, a jig and a support are arranged on the base, a concave cavity used for containing an actuator is formed in the jig, and the top face of the concave cavity is open; a pressing mechanism is installed on the support, the output end of the pressing mechanism is connected with a sealing cover, the sealing cover is located over the concave cavity, and the pressing mechanism is used for driving the sealing cover to press downwards so as to seal the concave cavity; the air tightness detector is communicated with the concave cavity of the jig through the test air pipe, and the air tightness detector is used for introducing air into the concave cavity of the jig through the test air pipe so as to detect the air tightness of the actuator. According to the utility model, the actuator to be detected is placed in the concave cavity of the jig, the pressing mechanism is utilized to drive the sealing cover to press the jig to form the closed space, the air tightness detector is utilized to inflate the concave cavity, and the sealing performance of the actuator is detected by measuring the air pressure change in the concave cavity, so that the actuator does not need to be disassembled; the influence on the sealing performance of the actuator is avoided, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an actuator airtightness testing device. Background Technology

[0002] Currently, there are many drawbacks to the methods used for testing the airtightness of actuators. Traditional testing methods typically require disassembling the actuator from the system, replacing the cable interface with a pneumatic connector, connecting an external air source, and testing from the inside out. This testing process is cumbersome and complex, involving multiple disassembly and installation steps. Each test consumes a significant amount of time and manpower, especially during large-scale production or equipment maintenance, where frequent disassembly and installation operations can significantly extend the testing cycle and impact production schedules.

[0003] More importantly, frequent disassembly and installation of actuators can significantly impact their sealing performance. During disassembly, the actuator's sealing components may be subjected to external forces such as compression, friction, or impact, leading to deformation, wear, or damage to the seals, thereby reducing sealing performance. Even with meticulous care during installation, it is difficult to completely restore the actuator to its original sealing state. After repeated disassembly and installation, the actuator's sealing performance gradually declines, making it more prone to leakage problems during subsequent use and increasing safety hazards in equipment operation.

[0004] With the rapid development of industrial automation, the quality requirements for actuators are becoming increasingly stringent. Traditional airtightness testing methods can no longer meet the demands for efficient, accurate, and non-destructive testing. Therefore, it is imperative to develop an airtightness testing device that is novel in structure, easy to use, reliable, and does not affect the sealing performance of the actuator. Utility Model Content

[0005] This invention proposes an actuator airtightness testing device, which solves the problems of low efficiency, high cost and impact on actuator performance in existing actuator airtightness testing methods.

[0006] The technical solution of this utility model is implemented as follows:

[0007] This utility model provides an actuator airtightness testing device, including an airtightness tester and a base. The base is provided with a fixture and a support. The fixture has a cavity for accommodating the actuator, and the top surface of the cavity is open. A clamping mechanism is installed on the support. The output end of the clamping mechanism is connected to a sealing cover. The sealing cover is located directly above the cavity. The clamping mechanism is used to drive the sealing cover down to seal the cavity. The airtightness tester is connected to the cavity of the fixture through a test air tube. The airtightness tester circulates air into the cavity of the fixture through the test air tube to test the airtightness of the actuator.

[0008] This invention places the actuator under test in the recess of a fixture, uses a clamping mechanism to drive the sealing cover to press against the top opening of the recess to form a closed space, and uses an airtightness tester to inflate the recess with air. The sealing performance of the actuator is tested by measuring the change in air pressure inside the recess. This eliminates the need to disassemble the actuator, avoids affecting the sealing performance of the actuator, greatly improves testing efficiency, reduces testing costs, and provides strong technical support for the production, quality inspection and maintenance of actuators.

[0009] Specifically, the base is provided with a positioning boss located directly below the sealing cover, and the bottom surface of the fixture is provided with a positioning groove that matches the positioning boss. By providing a positioning boss on the base for mounting the fixture, on the one hand, the fixture and the sealing cover can be quickly aligned, and on the other hand, fixtures of corresponding sizes can be matched according to different models and specifications of actuators, thereby meeting the testing requirements of different models and specifications of actuators.

[0010] Specifically, the top surface of the fixture is provided with an annular sealing groove, and a sealing ring is embedded in the annular sealing groove. By setting a sealing ring between the fixture and the sealing cover, the sealing performance between the sealing cover and the fixture can be further improved, and air leakage caused by poor sealing between the sealing cover and the fixture can be avoided, which would affect the airtightness test results of the actuator.

[0011] Preferably, the side wall of the sealing cover is provided with an air inlet connector, and the bottom surface of the sealing cover is provided with a vent hole communicating with the air inlet connector. The air inlet connector is connected to the test air pipe. The high-pressure gas output by the air tightness tester enters the cavity of the fixture through the test air pipe, the air inlet connector, and the vent hole to realize the air tightness test of the actuator.

[0012] Optionally, the fixture has an air inlet connector on its side wall that communicates with the cavity. The air inlet connector is connected to the test air pipe. Alternatively, high-pressure gas can be directly output to the fixture by an air tightness tester to achieve air tightness testing of the actuator.

[0013] Specifically, the clamping mechanism includes a cylinder, and a bypass pipe is connected to the middle section of the test air pipe. The bypass pipe is connected to the air circuit connector of the cylinder through a pneumatic control valve. By connecting the bypass pipe to the middle section of the test air pipe to supply air to the cylinder, the pipeline structure is optimized.

[0014] Specifically, the middle section of the test gas tube is equipped with a filter pressure reducing valve, which is mounted on the bracket to filter impurities in the gas and regulate the gas pressure, ensuring that the gas entering the device is pure and the pressure is stable, thus providing a guarantee for the stable operation of the cylinder.

[0015] Specifically, an electrical control box is provided on one side of the base, and the electrical control box is equipped with control buttons for controlling the pressing mechanism to drive the sealing cover to rise and fall, which facilitates operation. Attached Figure Description

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

[0017] Figure 1 This is a front structural diagram of an actuator airtightness testing device according to the present invention;

[0018] Figure 2 This is a schematic diagram showing the state of the detection device detecting the actuator in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the bottom structure of the fixture in an embodiment of this utility model;

[0020] In the diagram: 1. Air tightness tester; 2. Base; 3. Fixture; 4. Bracket; 5. Actuator; 6. Cavity; 7. Cylinder; 8. Sealing cover; 9. Test air tube; 10. Positioning boss; 11. Positioning groove; 12. Sealing ring; 13. Air inlet connector; 14. Bypass pipe; 15. Pneumatic control valve; 16. Filter pressure reducing valve; 17. Electrical control box; 18. Control button. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Reference Figures 1 to 3 This utility model provides an actuator airtightness testing device, including an airtightness tester 1 and a base 2. The base 2 is provided with a fixture 3 and a bracket 4. The fixture 3 has a cavity 6 for accommodating an actuator 5, and the top surface of the cavity 6 is open. A clamping mechanism is installed on the bracket 4. The output end of the clamping mechanism is connected to a sealing cover 8, which is located directly above the cavity 6. The clamping mechanism is used to drive the sealing cover 8 to press down to seal the cavity 6. The airtightness tester 1 is connected to the cavity 6 of the fixture 3 through a test air pipe 9. The airtightness tester 1 circulates air into the cavity 6 of the fixture 3 through the test air pipe 9 to test the airtightness of the actuator 5.

[0023] This invention places the actuator 5 under test in the cavity 6 of the fixture 3, and uses a clamping mechanism to drive the sealing cover 8 to press against the top opening of the cavity 6 of the fixture 3 to form a closed space. Air is then injected into the cavity 6 by an air tightness tester 1, and the sealing performance of the actuator 5 is tested by measuring the change in air pressure inside the cavity 6. This eliminates the need to disassemble the actuator 5, avoids affecting the sealing performance of the actuator 5, greatly improves the testing efficiency, reduces the testing cost, and provides strong technical support for the production, quality inspection and maintenance of the actuator 5.

[0024] Specifically, such as Figure 1 , 3 As shown, the base 2 is provided with a positioning boss 10, which is located directly below the sealing cover 8. The bottom surface of the fixture 3 is provided with a positioning groove 11 that matches the positioning boss 10. By providing a positioning boss 10 for mounting the fixture 3 on the base 2, the fixture 3 and the sealing cover 8 can be quickly aligned. On the other hand, fixtures of corresponding sizes can be matched according to different models and specifications of actuators 5, thereby meeting the testing requirements of different models and specifications of actuators 5.

[0025] Specifically, such as Figure 1 As shown, the top surface of the fixture 3 is provided with an annular sealing groove, and a sealing ring 12 is embedded in the annular sealing groove. By setting the sealing ring 12 between the fixture 3 and the sealing cover 8, the sealing performance between the sealing cover 8 and the fixture 3 can be further improved, and the air leakage caused by the poor sealing between the sealing cover 8 and the fixture 3 can be avoided, which would affect the air tightness test results of the actuator 5.

[0026] Preferably, such as Figure 2 As shown, the sealing cover 8 has an air inlet connector 13 on its side wall, and a vent hole communicating with the air inlet connector 13 is provided in the center of the bottom surface of the sealing cover 8. The air inlet connector 13 is connected to the test air pipe 9. The high-pressure gas output by the air tightness tester 1 enters the cavity 6 of the fixture 3 through the test air pipe 9, the air inlet connector 13, and the vent hole to realize the air tightness test of the actuator 5. In this embodiment, the sealing cover 8 has an air passage or cavity inside that connects the air inlet connector 13 and the vent hole.

[0027] Optionally, the fixture 3 has an air inlet connector on its side wall that communicates with the cavity 6. The air inlet connector is connected to the test air pipe 9. Alternatively, high-pressure gas can be directly output to the fixture 3 through the air tightness tester 1 to realize the air tightness test of the actuator 5. When the fixture 3 needs to be replaced, the test air pipe 9 needs to be reconnected to the air inlet connector.

[0028] Specifically, such as Figure 1 , 2As shown, the clamping mechanism includes a cylinder 7, and a bypass pipe 14 is connected to the middle section of the test air pipe 9. The bypass pipe 14 is connected to the air circuit connector of the cylinder 7 via a pneumatic control valve 15. By connecting the bypass pipe 14 to the middle section of the test air pipe 9 to supply air to the cylinder 7, the pipeline structure is optimized.

[0029] Specifically, such as Figure 1 , 2 As shown, the middle section of the test gas pipe 9 is equipped with a filter pressure reducing valve 16. The filter pressure reducing valve 16 is installed on the bracket 4 and is used to filter impurities in the gas and regulate the gas pressure to ensure that the gas entering the device is pure and the pressure is stable, thus providing a guarantee for the stable operation of the cylinder 7.

[0030] Specifically, such as Figure 1 As shown, an electrical control box 17 is provided on one side of the base 2. The electrical control box 17 is provided with a control button 18, which is used to control the pressing mechanism to drive the sealing cover 8 to rise and fall, making it convenient to operate.

[0031] In the specific implementation process, a pressure sensor (not shown in the figure) is installed at the connection between the piston rod of the cylinder 7 and the sealing cover 8. This sensor is used to provide feedback on the reaction force of the fixture 3 on the sealing cover 8. When the pressure value detected by the pressure sensor reaches the preset value, the cylinder 7 stops driving the sealing cover 8 to descend, so as to avoid the sealing cover 8 applying too much pressure to the fixture 3.

[0032] In this embodiment, the air tightness tester 1 can be a readily available mature product, such as the air tightness tester with model number HK-2AHZK-1.

[0033] The working process of the detection device in this embodiment is as follows:

[0034] First, the fixture 3 containing the actuator 5 to be tested is placed on the positioning boss 10 on the base 2, so that the positioning groove 11 on the bottom surface of the fixture 3 matches the positioning boss 10. Then, the clamping mechanism is controlled to drive the sealing cover 8 to press down on the top opening of the fixture 3, so that the cavity 6 inside the fixture 3 is sealed. Next, high-pressure gas is injected into the fixture 3 through the air tightness tester 1. After the gas filling is completed, the pressure holding stage begins. During the pressure holding stage, if there is a leak inside the actuator 5, the pressure inside the cavity 6 will decrease; if there is no leak inside the actuator 5, the pressure inside the cavity 6 will remain unchanged. After the pressure holding stage is completed, the venting operation is performed, thus completing the entire testing process.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An actuator airtightness testing device, characterized in that, The device includes an airtightness tester (1) and a base (2). The base (2) is provided with a fixture (3) and a bracket (4). The fixture (3) has a cavity (6) inside for accommodating the actuator (5). The top surface of the cavity (6) is open. A clamping mechanism is installed on the bracket (4). The output end of the clamping mechanism is connected to a sealing cover (8). The sealing cover (8) is located directly above the cavity (6). The clamping mechanism is used to drive the sealing cover (8) to press down to seal the cavity (6). The airtightness tester (1) is connected to the cavity (6) of the fixture (3) through a test air tube (9). The airtightness tester (1) vents air into the cavity (6) of the fixture (3) through the test air tube (9) to test the airtightness of the actuator (5).

2. The actuator airtightness testing device as described in claim 1, characterized in that, The base (2) is provided with a positioning boss (10), which is located directly below the sealing cover (8). The bottom surface of the fixture (3) is provided with a positioning groove (11) that matches the positioning boss (10).

3. The actuator airtightness testing device as described in claim 1, characterized in that, The top surface of the fixture (3) is provided with an annular sealing groove, and a sealing ring (12) is embedded in the annular sealing groove.

4. The actuator airtightness testing device as described in claim 1, characterized in that, The sealing cover (8) has an air inlet connector (13) on its side wall, and the bottom surface of the sealing cover (8) has a vent hole that communicates with the air inlet connector (13). The air inlet connector (13) is connected to the test air tube (9).

5. The actuator airtightness testing device as described in claim 1, characterized in that, The fixture (3) has an air inlet connector (13) on its side wall that communicates with the cavity (6), and the air inlet connector (13) is connected to the test air tube (9).

6. The actuator airtightness testing device as described in claim 1, characterized in that, The clamping mechanism includes a cylinder (7), and a bypass pipe (14) is connected to the middle section of the test air pipe (9). The bypass pipe (14) is connected to the air circuit connector of the cylinder (7) via an air control valve (15).

7. The actuator airtightness testing device as described in claim 1, characterized in that, The middle section of the test air tube (9) is provided with a filter pressure reducing valve (16), which is mounted on the bracket (4).

8. The actuator airtightness testing device as described in claim 1, characterized in that, An electrical control box (17) is provided on one side of the base (2), and a control button (18) is provided on the electrical control box (17) for controlling the pressing mechanism to drive the sealing cover (8) to rise and fall.

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