Airtightness test tooling

Abstract

The present invention discloses an airtightness test tool, including a matching tool box and a tool assembly; the tool assembly is provided with a pressure gauge for detecting the gas pressure in the pipeline, an auxiliary interface for accessing a 20L sealed gas tank, and a trachea joint for connecting the pressure gauge and the sealed gas tank, and the trachea joint is connected to the pressure gauge and the auxiliary interface through a PU tube respectively; the trachea joint is also provided with a test interface for accessing the airtightness tester; the tool assembly is also provided with a cylinder for additionally pressurizing the gas circuit, and the cylinder is connected to the trachea joint through a PU tube. The present invention can perform detection by connecting the airtightness tester to the test interface on the test tool. After the maximum allowable error is detected, there is no need to replace the line, and the airtightness test can be performed directly. No manual timing is required during the detection process, which shortens the detection time and improves the detection efficiency and detection accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of airtightness instruments, in particular to an airtightness instrument inspection tool. Background Art

[0002] With the continuous development of science and technology, the requirements for products are constantly increasing, and the requirements for product airtightness are becoming more and more stringent, so there are direct pressure airtightness testers (referred to as airtightness testers). Airtightness testers are widely used in aerospace, new energy vehicles, medical, electronics, electrical appliances, refrigeration and other industries.

[0003] The industry involved in airtight instruments is quite broad, and the demand is relatively large. There are many internal components such as pressure sensors, air pumps, solenoid valves, adapters, and air pipes. It is very likely that the performance of the airtight instrument will be unqualified due to defects in one of the components or assembly errors. Therefore, the airtight instrument needs to be inspected for function and performance before leaving the factory. Since the items for factory inspection of airtight instruments are relatively many and cumbersome, the inspection contents include normal working performance, maximum allowable error, stability, pressure sensor error, zero drift, and airtightness. At present, there is no special testing equipment for airtight instruments on the market. When testing the maximum allowable error and airtightness, it is necessary to use inspection tools to complete it. If the inspection tool is not used for inspection, the test results may be inaccurate, and the quality of the airtight instrument itself cannot be fully and effectively controlled.

[0004] At present, the most commonly used inspection method is to connect the airtightness tester with a 20L airtight gas tank and a digital pressure gauge with a PU tube, and inflate the gas tank through the airtightness tester. After the inflation is completed, the data of the airtightness tester and the digital pressure gauge are read for calculation, and this method is used to determine whether the airtightness tester is qualified. This inspection method requires reconnecting the PU tube for each test of an airtightness tester, and manual timing is required. The inspection time is relatively long and the inspection efficiency is relatively low, which cannot meet the rhythm of rapid production of airtightness testers. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an airtightness tester inspection tool, which eliminates the manual timing link, shortens the inspection time and improves the inspection efficiency.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0007] The airtightness test tool comprises a matching tool box and a tool assembly; the tool assembly is provided with a pressure gauge for detecting the gas pressure in the pipeline, an auxiliary interface for connecting to a 20L sealed gas tank, and an air pipe joint for connecting the pressure gauge and the sealed gas tank, and the air pipe joint is connected to the pressure gauge and the auxiliary interface through a PU tube respectively; the air pipe joint is also provided with a test interface for connecting to the airtightness tester; the tool assembly is also provided with a cylinder for additional pressurization of the air circuit, and the cylinder is connected to the air pipe joint through a PU tube.

[0008] The above-mentioned air tightness tester tooling is provided with an air circuit switch for cutting off the pipeline between the air tightness tester and the sealed gas tank on the PU tube between the air pipe joint and the auxiliary interface.

[0009] The above-mentioned airtightness test tooling is provided with a travel guide rail for driving the cylinder to move, the end of the cylinder telescopic rod is connected to the travel guide rail, and a motor for driving the travel guide rail to move forward and backward is provided inside the tooling box. A button for controlling the movement of the motor is also provided on the tooling assembly, and the output end of the button is connected to the input end of the motor.

[0010] The buttons of the above-mentioned airtightness tester tooling include a forward button for driving the travel guide rail to move forward and a backward button for driving the travel guide rail to move backward, and the output ends of the forward button and the backward button are respectively connected to the input end of the motor.

[0011] The airtightness test tool mentioned above, the cylinder is an adjustable cylinder with a volume of 0-20ml.

[0012] In the above-mentioned air tightness tester tooling, the air pipe joint is a cross quick-connect joint.

[0013] The above-mentioned air tightness tester inspection tooling, the air circuit switch and the air cylinder are respectively fixed to the tooling assembly by bolts.

[0014] The above-mentioned airtightness tester tooling, the air pipe joint is fixed to the tooling assembly by a nylon tie.

[0015] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0016] The present invention can perform testing by connecting the airtightness tester to the test interface on the test tooling. After the maximum allowable error is tested, there is no need to replace the circuit and the airtightness test can be performed directly. During the testing process, no manual timing is required, which shortens the testing time and improves the testing efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Among them: 1. Tooling assembly, 2. Pressure gauge, 3. Air pipe joint, 4. Air circuit switch, 5. Auxiliary interface, 6. Test interface, 7. Travel guide rail, 8. Button, 9. Cylinder, 10. PU pipe, 11. Tooling box. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] The structure of the airtightness test tool is as follows: Figure 1 As shown, it includes a tooling assembly 1 and a tooling box 11, wherein the tooling assembly 1 is located above the tooling box 11, and the two are matched.

[0021] The tooling assembly 1 is provided with a pressure gauge 2, an auxiliary interface 5, an air pipe joint 3 and a cylinder 9. The pressure gauge 2 is used to detect the pressure of the gas in the pipeline, the auxiliary interface 5 is used to connect to a 20L sealed gas tank, the cylinder 9 is used to increase the pressure of the gas circuit, the air pipe joint 3 is used to connect the pressure gauge 2, the sealed gas tank and the cylinder 9, the pressure gauge 2, the sealed gas tank and the cylinder 9 are respectively connected to the air pipe joint 3 through a PU tube 10, the air pipe joint 3 is a cross quick-connect plug, and a test interface 6 is also left on the air pipe joint 3 for connecting an airtightness tester.

[0022] An air circuit switch 4 is provided on the PU tube 10 between the air pipe joint 3 and the auxiliary interface 5, which is used to cut off the pipeline between the airtightness instrument and the sealed gas tank. When performing an airtightness test on the airtightness instrument, the connection between the airtightness instrument and the sealed gas tank is disconnected by the air circuit switch 4 to perform the test, without having to change the air circuit connection line, thereby facilitating operation.

[0023] The cylinder is an adjustable cylinder with a volume of 0-20 ml, which can be adjusted between 0-20 ml. A travel guide rail 7 is provided on the tooling assembly 1, and the end of the telescopic rod of the cylinder 9 is connected to the travel guide rail 7. A motor is provided in the tooling box 11 below the tooling assembly 1 to drive the travel guide rail to move forward and backward. A button 8 is provided on the tooling assembly 1, and the output end of the button 8 is connected to the input end of the motor to control the motor action.

[0024] The buttons 8 include a forward button and a backward button. The forward button is used to drive the travel guide 7 to move forward, and the backward button is used to drive the travel guide 7 to move backward. The output ends of the forward button and the backward button are respectively connected to the input ends of the motor. The forward button and the backward button control the forward and reverse rotation of the motor to drive the travel guide 7 to move forward and backward. Since the telescopic rod of the cylinder is fixed on the travel guide, when the travel guide moves forward and backward, the telescopic rod of the cylinder is driven to move, thereby realizing the volume adjustment of the cylinder within a volume of 0-20ml.

[0025] The gas circuit switch 4 and the gas cylinder 9 are respectively fixed to the tooling assembly 1 by bolts, which enhances the stability of the detection tooling during the detection process. The air pipe joint 3 is fixed to the tooling assembly 1 by a nylon tie, which is convenient for plugging in the airtightness instrument for detection.

[0026] When the present invention performs maximum allowable error detection on the airtightness instrument, the airtightness instrument is connected to the test interface, the sealed gas tank is connected to the auxiliary interface, the gas circuit switch is turned on, and the airtightness instrument is used to inflate the 20L sealed gas tank. When the pressure gauge detects that the pressure is stable, it automatically times 100S. After the air pressure is stable, press the button to change the position of the cylinder telescopic rod, change the gas circuit volume, read the generated pressure difference measurement value, and then restore the cylinder telescopic rod to its original position. After repeating the test three times, the pressure difference measurement value generated under the same volume change is recorded, and it is judged whether the airtightness instrument meets the maximum allowable error according to the pressure difference value.

[0027] Then conduct an air tightness test. First, set the pressurization time, balance time and test time on the airtightness meter. Then adjust the gas source to the maximum test pressure allowed by the airtightness meter and start inflation. After the inflation is completed, close the gas circuit switch to disconnect the airtightness meter from the 20L closed gas tank. Observe whether the values ​​displayed on the airtightness meter and the pressure gauge are consistent. After the test is completed, remove the airtightness meter and replace it with the next airtightness meter for a new round of testing.

Claims

1. Airtightness test tool, characterized by: The utility model comprises a tool box (11) and a tool assembly (1) which are matched with each other; the tool assembly (1) is provided with a pressure gauge (2) for detecting the gas pressure in the pipeline, an auxiliary interface (5) for connecting to a 20L sealed gas tank, and an air pipe joint (3) for connecting the pressure gauge (2) and the sealed gas tank, and the air pipe joint (3) is connected to the pressure gauge (2) and the auxiliary interface (5) through a PU tube (10) respectively; the air pipe joint (3) is also provided with a test interface (6) for connecting to an airtightness tester; the tool assembly (1) is also provided with a cylinder (9) for additionally pressurizing the gas circuit, and the cylinder (9) is connected to the PU tube (10) through a PU tube (10). The tooling assembly (1) is connected to the air pipe joint (3); a travel guide rail (7) for driving the cylinder (9) to move is arranged on the tooling assembly (1); the end of the telescopic rod of the cylinder (9) is connected to the travel guide rail (7); a motor for driving the travel guide rail to move forward and backward is arranged inside the tooling box (11); a button (8) for controlling the movement of the motor is also arranged on the tooling assembly (1); the output end of the button (8) is connected to the input end of the motor; the button (8) includes a forward button for driving the travel guide rail (7) to move forward and a backward button for driving the travel guide rail (7) to move backward, and the output ends of the forward button and the backward button are respectively connected to the input end of the motor; The air pipe connector (3) is a cross quick-connect connector.

2. The airtightness tester inspection tool according to claim 1, characterized in that: The PU tube (10) between the air pipe joint (3) and the auxiliary interface (5) is provided with an air circuit switch (4) for cutting off the pipeline between the airtightness instrument and the sealed gas tank.

3. The airtightness tester inspection tool according to claim 1, characterized in that: The cylinder (9) is an adjustable cylinder with a volume of 0-20 ml.

4. The airtightness tester inspection tool according to claim 2, characterized in that: The gas circuit switch (4) and the gas cylinder (9) are respectively fixed to the tooling assembly (1) by means of bolts.

5. The airtightness tester inspection tool according to claim 1, characterized in that: The air pipe joint (3) is fixed to the tooling assembly (1) via a nylon tie.

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