Air tightness rapid detection tool jig

Abstract

The utility model discloses an air tightness rapid detection tool jig which comprises a detection table, a supporting seat is arranged at the upper end of the detection table, an air injection hole is formed in the center of the supporting seat, an air compression pump is arranged below the detection table, an air injection pipe is arranged in the air injection hole, a detection frame is arranged above the detection table, and an air pressure sensor is arranged on the detection frame. The tool jig comprises a detection frame, a connecting disc is arranged on the inner side of the detection frame, a first electric push rod is arranged above the connecting disc, a pressing disc is arranged below the connecting disc, a compression spring is arranged between the pressing disc and the connecting disc, and an air pressure sensor is arranged at the center of the lower end of the pressing disc. The air pressure sensor is used for measuring the air pressure of the inner cavity, the end opening of the workpiece is blocked, the inner cavity of the workpiece is in a sealed state, the air pressure sensor measures the air pressure of the inner cavity, and rapid air tightness detection is achieved according to the change of the measured air pressure.

Description

Technical Field

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

[0002] In industrial production and processing, it is necessary to conduct airtightness testing on some workpieces that have airtightness requirements. This is used to verify whether the workpiece meets the production and processing standards, and it can also be used to sample some workpieces in a large batch to determine the pass rate of that batch of workpieces. Whether the airtightness of the workpiece is good or bad directly affects the performance of the workpiece and even affects safety issues.

[0003] Chinese Patent Publication No. CN212779778U, authorized on March 23, 2021, discloses a rapid airtightness testing fixture, comprising a base, a mounting seat fixedly installed at the center of the upper surface of the base, and a sealing cover movably fitted on the upper surface of the base outside the mounting seat. A semi-circular ring movably installed on the upper surface of the base outside the sealing cover, and a support plate fixedly installed on the upper surface of the base outside the semi-circular ring. A screw rod passes through the support plate and the semi-circular ring. A fixing sleeve rod is fixedly installed inside the upper surface of the sealing cover. A hydraulic cylinder is fixedly installed at one end of the fixing sleeve rod outside the sealing cover, and a telescopic rod is movably connected at the other end of the fixing sleeve rod inside the sealing cover. The telescopic rod presses down on a first pressure plate to fix the test piece, and the semi-circular ring locks the sealing cover. The airtightness of the test piece is measured by the air pressure difference inside and outside the sealing cover, avoiding direct contact between the test piece and water source.

[0004] Most existing airtightness testing methods involve immersing the workpiece in a liquid and observing whether bubbles are generated to determine airtightness. However, liquid penetration into the workpiece can easily damage it, reducing the effectiveness of the airtightness test and failing to meet usage requirements. Utility Model Content

[0005] The purpose of this utility model is to provide a tooling fixture for rapid airtightness testing, in order to solve the problem mentioned in the background art that most existing airtightness testing methods involve immersing the workpiece in liquid and observing whether air bubbles are generated to achieve airtightness testing. However, the liquid can easily penetrate into the interior of the workpiece, damaging it and reducing the effectiveness of the airtightness testing, thus failing to meet the usage requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a rapid airtightness testing fixture, comprising a testing platform, a support base at the upper end of the testing platform, and the support base being fixedly connected to the testing platform; an air injection hole at the center of the support base; an air compressor at the lower end of the testing platform, and the air compressor being connected to the testing platform by screws; an air injection pipe inside the air injection hole, and both ends of the air injection pipe being integrally connected to the support base and the air compressor, respectively; and a testing frame at the upper end of the testing platform, and the testing frame being fixedly connected to the testing platform. The inner side of the testing frame is provided with a connecting plate, and a first electric push rod is provided above the connecting plate. The first electric push rod is fixedly connected to the testing frame and the connecting plate. A pressure plate is provided below the connecting plate and is located above the support base. A compression spring is provided between the pressure plate and the connecting plate. At least four compression springs are provided and are equidistantly arranged above the pressure plate. The two ends of the compression springs are fixedly connected to the pressure plate and the connecting plate, respectively. A pressure sensor is provided at the center of the lower end of the pressure plate and is fixedly connected to the pressure plate.

[0007] Preferably, the air injection pipe is equipped with a solenoid valve, and the solenoid valve is integrated with the air injection pipe.

[0008] Preferably, a silicone pad is provided at the upper end of the support base and the lower end of the pressure plate, and the silicone pad is integrated with the support base and the pressure plate.

[0009] Preferably, an electrical control panel is provided on one side of the testing station, and the electrical control panel is connected to the testing station by screws, and the air pressure sensor is electrically connected to the electrical control panel.

[0010] Preferably, the connecting plate is provided with guide holes, at least four of which are provided and are located at the upper end of the compression spring. A guide rod is provided inside the compression spring, and one end of the guide rod is fixedly connected to the pressure plate. The guide rod is connected through the guide holes and is slidably connected to the connecting plate and the compression spring.

[0011] Preferably, rubber clamps are provided on both sides above the support base. There are two rubber clamps. A second electric push rod is provided between each of the two rubber clamps and the testing frame. The second electric push rod is fixedly connected to the testing frame and the rubber clamps.

[0012] Preferably, the inner sidewall of the testing frame is provided with guide grooves, and there are two guide grooves. Both sides of the connecting plate are provided with connecting plates, and there are two connecting plates. The connecting plates are fixedly connected to the connecting plate. One end of the connecting plate extends into the interior of the guide groove, and the connecting plate is slidably connected to the testing frame.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model device, through the arrangement of a support base, an air pump, a pressure plate, a connecting plate, a first electric push rod, an air injection pipe, and an air pressure sensor, allows the lower end of the workpiece to be tested to be placed on the support base. The first electric push rod drives the connecting plate to descend, and as the connecting plate descends, it brings the pressure plate into contact with the upper end of the workpiece. The support base and the pressure plate block both ends of the workpiece, creating a sealed state. Under the action of the air pump, air is injected into the inner cavity of the workpiece through the air injection pipe, making the inner cavity of the workpiece under high pressure. The air pressure sensor measures the air pressure in the inner cavity of the workpiece. The air pressure is measured for a period of time after the inner cavity of the workpiece is filled with gas, and the changes in air pressure during this period are observed to achieve rapid airtightness detection.

[0015] 2. The utility model device uses a rubber clamp and a second electric push rod. The second electric push rod drives the rubber clamp to move, and the rubber clamp clamps and fixes the workpiece from both sides, ensuring the stability of the workpiece inspection process.

[0016] 3. The device of this utility model uses a silicone pad, a guide rod and a compression spring. The guide rod and compression spring enable the installed pressure plate to have a buffering effect and play a protective role when in contact with the workpiece. The silicone pad fills the connection gap between the workpiece and the support base and the pressure plate, improves the sealing performance of the connection between the workpiece and the support base and the pressure plate, and improves the accuracy of airtightness detection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a diagram showing the connection relationship between the pressure plate and the connecting plate of this utility model;

[0019] Figure 3 This is a cross-sectional view of the present invention;

[0020] Figure 4 For the present utility model Figure 3 A magnified view of a portion of area A.

[0021] In the diagram: 1. Testing platform; 2. Support base; 3. Electrical control panel; 4. Testing frame; 5. Air pump; 6. Pressure plate; 7. Connecting plate; 8. First electric actuator; 9. Connecting plate; 10. Guide groove; 11. Guide hole; 12. Silicone pad; 13. Guide rod; 14. Compression spring; 15. Air injection pipe; 16. Solenoid valve; 17. Air pressure sensor; 18. Rubber clamp; 19. Second electric actuator; 20. Air injection port. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 This utility model provides an embodiment of a rapid airtightness testing fixture, comprising a testing platform 1, a support base 2 fixedly connected to the upper end of the testing platform 1, an air injection hole 20 at the center of the support base 2, an air compressor 5 below the testing platform 1 connected to the testing platform 1 by screws, an air injection pipe 15 inside the air injection hole 20, and both ends of the air injection pipe 15 being integrally connected to the support base 2 and the air compressor 5, respectively, a testing frame 4 fixedly connected to the testing platform 1 above the testing platform 1, a connecting plate 7 on the inner side of the testing frame 4, and a first electric push rod 8 above the connecting plate 7, the first electric push rod 8 being connected to the testing frame 4 and the air compressor 5. The connecting plate 7 is fixedly connected, and a pressure plate 6 is provided below the connecting plate 7. The pressure plate 6 is located above the support base 2. A compression spring 14 is provided between the pressure plate 6 and the connecting plate 7. At least four compression springs 14 are provided and are equidistantly arranged above the pressure plate 6. The two ends of the compression spring 14 are fixedly connected to the pressure plate 6 and the connecting plate 7, respectively. A pressure sensor 17 is provided at the center of the lower end of the pressure plate 6 and is fixedly connected to the pressure plate 6. A solenoid valve 16 is provided on the air injection pipe 15 and is integrated with the air injection pipe 15. An electric control panel 3 is provided on one side of the testing platform 1 and is connected to the testing platform 1 by screws. The pressure sensor 17 is electrically connected to the electric control panel 3.

[0024] In use: Place the lower end of the workpiece to be tested on the support base 2, drive the first electric push rod 8 to drive the connecting plate 7 to descend. As the connecting plate 7 descends, the pressure plate 6 contacts the upper end of the workpiece to be tested. The support base 2 and the pressure plate 6 block both ends of the workpiece, making the workpiece form a sealed state. Open the solenoid valve 16 and turn on the air pump 5. Under the action of the air pump 5, air is injected into the inner cavity of the workpiece through the air injection pipe 15, making the inner cavity of the workpiece under high pressure. The air pressure sensor 17 measures the air pressure in the inner cavity of the workpiece. The workpiece with the inner cavity filled with gas is measured for a period of time, and the change in air pressure during this period is observed to achieve rapid airtightness detection.

[0025] Please see Figure 1 and Figure 2 Silicone pads 12 are provided at the upper end of the support base 2 and the lower end of the pressure plate 6. The silicone pads 12 are integrated with the support base 2 and the pressure plate 6. The silicone pads 12 fill the gap between the workpiece and the support base 2 and the pressure plate 6, improve the sealing of the connection between the workpiece and the support base 2 and the pressure plate 6, and improve the accuracy of airtightness testing.

[0026] Please see Figure 1 and Figure 3The connecting plate 7 is provided with guide holes 11, at least four of which are located at the upper end of the compression spring 14. A guide rod 13 is provided inside the compression spring 14, with one end of the guide rod 13 fixedly connected to the pressure plate 6. The guide rod 13 passes through the guide holes 11 and is slidably connected to the connecting plate 7 and the compression spring 14. Two guide grooves 10 are provided on the inner side wall of the inspection frame 4. Two connecting plates 9 are provided on both sides of the connecting plate 7 and are fixedly connected to the connecting plate 7. One end of the connecting plate 9 extends into the guide groove 10 and is slidably connected to the inspection frame 4. The guide rod 13 and the compression spring 14 provide a buffering effect for the installed pressure plate 6, protecting it when in contact with the workpiece. The connecting plates 9 and the guide grooves 10 guide the rising and falling connecting plate 7, ensuring the lower end of the descending pressure plate 6 is horizontal, thus improving the sealing effect of the pressure plate 6 on the workpiece.

[0027] Please see Figure 1 and Figure 3 Rubber clamps 18 are provided on both sides above the support base 2. There are two rubber clamps 18. A second electric push rod 19 is provided between each rubber clamp 18 and the inspection frame 4. The second electric push rod 19 is fixedly connected to the inspection frame 4 and the rubber clamps 18. The second electric push rod 19 drives the rubber clamps 18 to move, and the rubber clamps 18 clamp and fix the workpiece from both sides to ensure the stability of the workpiece inspection process.

[0028] Working principle: The lower end of the workpiece to be tested is placed on the support base 2. The second electric push rod 19 is driven to move the rubber clamp 18. The rubber clamp 18 clamps and fixes the workpiece from both sides. Then, the first electric push rod 8 is driven to lower the connecting plate 7. As the connecting plate 7 lowers, the pressure plate 6 contacts the upper end of the workpiece to be tested. The support base 2 and the pressure plate 6 block both ends of the workpiece, making the workpiece in a sealed state. The solenoid valve 16 is opened and the air pump 5 is turned on. Under the action of the air pump 5, air is injected into the inner cavity of the workpiece through the air injection pipe 15, so that the inner cavity of the workpiece is in a high-pressure state. The air pressure sensor 17 measures the air pressure in the inner cavity of the workpiece. The workpiece with the inner cavity filled with gas is measured for a period of time, and the change in air pressure during this period is observed to achieve rapid airtightness detection.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art. It should also be noted that the airtightness rapid testing fixture disclosed in this utility model has a wide range of applications, including but not limited to handheld tools.

[0030] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid airtightness testing fixture, comprising a testing table (1), characterized in that: The upper end of the testing platform (1) is provided with a support base (2), and the support base (2) is fixedly connected to the testing platform (1). An air injection hole (20) is provided at the center of the support base (2). An air compressor (5) is provided below the testing platform (1), and the air compressor (5) is connected to the testing platform (1) by screws. An air injection pipe (15) is provided inside the air injection hole (20), and the two ends of the air injection pipe (15) are respectively connected to the support base (2) and the air compressor (5) as a whole. A testing frame (4) is provided above the testing platform (1), and the testing frame (4) is fixedly connected to the testing platform (1). A connecting plate (7) is provided on the inner side of the testing frame (4). A first electric push rod (8) is provided above the test frame (4) and the connecting plate (7). A pressure plate (6) is provided below the connecting plate (7) and is located above the support base (2). A compression spring (14) is provided between the pressure plate (6) and the connecting plate (7). At least four compression springs (14) are provided and are equidistantly arranged above the pressure plate (6). The two ends of the compression springs (14) are fixedly connected to the pressure plate (6) and the connecting plate (7) respectively. A pressure sensor (17) is provided at the center of the lower end of the pressure plate (6) and is fixedly connected to the pressure plate (6).

2. The rapid airtightness testing fixture according to claim 1, characterized in that: The gas injection pipe (15) is equipped with a solenoid valve (16), and the solenoid valve (16) is connected to the gas injection pipe (15) as a whole.

3. The rapid airtightness testing fixture according to claim 1, characterized in that: The upper end of the support base (2) and the lower end of the pressure plate (6) are both provided with silicone pads (12), and the silicone pads (12) are connected to the support base (2) and the pressure plate (6) as a whole.

4. The rapid airtightness testing fixture according to claim 1, characterized in that: An electrical control panel (3) is provided on one side of the testing platform (1), and the electrical control panel (3) is connected to the testing platform (1) by screws. The air pressure sensor (17) is electrically connected to the electrical control panel (3).

5. The rapid airtightness testing fixture according to claim 1, characterized in that: The connecting plate (7) is provided with guide holes (11), and there are at least four guide holes (11). The guide holes (11) are located at the upper end of the compression spring (14). The compression spring (14) is provided with a guide rod (13), and one end of the guide rod (13) is fixedly connected to the pressure plate (6). The guide rod (13) is connected through the guide holes (11), and the guide rod (13) is slidably connected to the connecting plate (7) and the compression spring (14).

6. The rapid airtightness testing fixture according to claim 1, characterized in that: Rubber clamps (18) are provided on both sides above the support base (2). There are two rubber clamps (18). A second electric push rod (19) is provided between the two rubber clamps (18) and the detection frame (4). The second electric push rod (19) is fixedly connected to the detection frame (4) and the rubber clamps (18).

7. The rapid airtightness testing fixture according to claim 1, characterized in that: The inner wall of the testing frame (4) is provided with a guide groove (10), and there are two guide grooves (10). Both sides of the connecting plate (7) are provided with connecting plates (9), and there are two connecting plates (9). The connecting plates (9) are fixedly connected to the connecting plate (7). One end of the connecting plate (9) extends into the interior of the guide groove (10), and the connecting plate (9) is slidably connected to the testing frame (4).

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