Air tightness testing machine and use method thereof

Abstract

The invention belongs to the technical field of air tightness testing, and particularly relates to an air tightness testing machine and a using method thereof.The air tightness testing machine comprises a mounting frame, a vacuum pump is mounted in the mounting frame, an air suction pipe is mounted outside the vacuum pump, and an observation chamber is fixedly mounted at the end, away from the vacuum pump, of the air suction pipe; one side, far away from the air suction pipe, of the observation chamber is communicated and connected with a test pipe below the air suction pipe, and a detection solution is placed in the observation chamber; the vacuum pump is started to run to generate negative pressure, and the air tightness of the tested product can be judged by observing whether the solution in the observation chamber generates bubbles, so that high cost caused by positive-pressure inflation of a traditional air tightness detection device is avoided, and meanwhile, the air tightness of the tested product can be judged by observing the bubbles in the air tightness detection device through a bubble observation mode. Even if the to-be-detected product has slight air leakage, bubbles are generated, so that the to-be-detected product is perceived and judged as a defective product, and the accuracy of air tightness detection is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of air tightness testing, in particular to an air tightness testing machine and a use method thereof. Background Art

[0002] In daily life, we often use many devices that need to be sealed, such as various pipes, valves, boosters, etc. These devices need to ensure their sealing performance during use to avoid the escape of materials inside the device, resulting in waste, and even more seriously, causing accidents.

[0003] Traditional tightness testing devices determine the leakage of the object being tested through air pressure changes, gas concentration detection, or visual observation. A common method is to place the device to be tested in a special mold or water, then inflate the device with positive pressure, and then observe whether there is any leakage to determine the sealing condition of the device.

[0004] Currently, most existing technologies for sealing detection use positive pressure inflation. However, this method has many disadvantages, especially when there is a slight leak in the device. At this time, the positive pressure inflation method is used. The gas released is very small and difficult to observe, which leads to deviations in detection, allowing defective products to flow into the market and have a negative impact on the company.

[0005] To this end, the present invention provides an airtightness testing machine and a method for using the same. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the air tightness testing machine described in the present invention includes a mounting frame, a vacuum pump is installed inside the mounting frame, an intake pipe is installed outside the vacuum pump, an observation chamber is fixedly installed on the end of the intake pipe away from the vacuum pump, the observation chamber is away from the side of the intake pipe and is located below the intake pipe and is connected to a test tube, a detection solution is placed inside the observation chamber, and the liquid level of the detection solution is higher than the connection between the test tube and the observation chamber, and lower than the connection between the intake pipe and the observation chamber.

[0008] Preferably, a test fixture is fixedly mounted on the top surface of the mounting frame, a control box is mounted on the bottom end of the mounting frame, and a crimping block that can be raised and lowered is provided above the test fixture.

[0009] Preferably, the top surface of the crimping block is connected to a mounting plate by bolts, the top surface of the mounting plate is fixedly connected to a telescopic rod, the outside of the telescopic rod is slidably connected to a limiting frame, the side of the limiting frame away from the telescopic rod is fixedly connected to the telescopic frame, the telescopic frame is slidably inserted into the inside of the mounting frame, and a driving assembly is installed on the top of the telescopic rod, and the driving assembly is used to drive the telescopic rod to rise and fall.

[0010] Preferably, the driving assembly includes a handle, one end of the handle is rotatably connected to the telescopic frame, the outside of the handle is rotatably connected to a pair of hinges, and the ends of the pair of hinges away from the handle are rotatably connected to the top of the telescopic rod.

[0011] Preferably, a locking ring is fixedly connected to one end of the test tube away from the observation chamber, a cavity is defined inside the locking ring, an annular elastic membrane is fixedly connected to the inner wall of the locking ring and outside the cavity, a ventilation valve is fixedly connected to the outer wall of the locking ring, and the ventilation valve is connected to the cavity.

[0012] Preferably, a plurality of pistons are slidably connected inside the locking ring and on the side of the cavity away from the test tube, a transmission rod is fixedly connected to the side of the piston away from the cavity, an extrusion plate is fixedly connected to the side of the transmission rod away from the piston, and a matching empty groove is provided inside the locking ring and on the outside of the extrusion plate, powder is placed inside the empty groove, and a screen is fixedly connected to the side of the empty groove away from the extrusion plate.

[0013] Preferably, a magnet is fixedly connected to the side of the piston away from the cavity, and a conductive electromagnet is provided on the side of the magnet away from the piston, and the conductive electromagnet is fixedly connected to the locking ring.

[0014] Preferably, a plurality of elastic blades are staggered and fixedly connected inside the hollow slot and on a side away from the extrusion plate, and a plurality of through holes are formed on sides of the plurality of elastic blades that are close to each other.

[0015] A method for using an air tightness testing machine, wherein the method uses any of the air tightness testing machines described above to perform an air tightness test, comprising the following steps:

[0016] S1. Install the product to be tested;

[0017] S2, start the vacuum pump to generate negative pressure;

[0018] S3. Observe the solution inside the observation chamber.

[0019] Preferably, the specific installation steps in S1 are as follows:

[0020] Step 1: Place the test product on the test fixture;

[0021] Step 2: The crimping block descends to press and tighten the test product to prevent it from moving;

[0022] Step 3: Insert the test tube into the plug to complete the installation.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The air tightness testing machine and the method of using the same described in the present invention start a vacuum pump to generate negative pressure, and observe whether bubbles are generated in the solution inside the observation chamber to determine the air tightness of the test product. In this way, the high cost of positive pressure inflation of traditional air tightness testing devices is avoided. At the same time, through bubble observation, even if there is a slight leak in the product to be tested, bubbles will be generated, which will be detected and judged as a defective product, thereby improving the accuracy of air tightness testing.

[0025] 2. The airtightness tester and method of use of the present invention utilizes a locking ring with a cavity and an annular elastic membrane within it. During installation, the annular elastic membrane expands and seals. This not only solves the problem of inaccurate testing due to wear of the test tube caused by prolonged insertion, but also allows the present invention to be compatible with a wider range of product models, thereby expanding the scope of application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 is a perspective view of the present invention;

[0028] Figure 2 It is a front view of the present invention;

[0029] Figure 3 It is a schematic diagram of the test fixture structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the test product structure in the present invention;

[0031] Figure 5 is a perspective view of a second embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the locking ring structure in the second embodiment of the present invention;

[0033] Figure 7 is a partial cross-sectional view of the locking ring structure in the second embodiment of the present invention;

[0034] Figure 8 is a cross-sectional view of the locking ring structure in the second embodiment of the present invention;

[0035] Figure 9 This invention Figure 8 Schematic diagram of the method at A.

[0036] In the figure: 1. Mounting frame; 2. Suction pipe; 3. Observation chamber; 4. Test tube; 5. Test fixture; 6. Control box; 7. Crimping block; 8. Mounting plate; 9. Telescopic rod; 10. Hinge iron; 11. Handle; 12. Limiting frame; 13. Telescopic frame; 14. Test product; 1401. Concave shell; 1402. Plug; 15. Locking ring; 16. Cavity; 17. Annular elastic membrane; 18. Ventilation valve; 19. Piston; 20. Transmission rod; 21. Extrusion plate; 22. Empty slot; 23. Screen; 24. Magnet; 25. Electromagnet; 26. Elastic blade; 27. Through hole. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0038] like Figures 1 to 2 As shown, an air tightness testing machine according to an embodiment of the present invention includes a mounting frame 1, a vacuum pump is installed inside the mounting frame 1, an air suction pipe 2 is installed outside the vacuum pump, an observation chamber 3 is fixedly installed at one end of the air suction pipe 2 away from the vacuum pump, a test tube 4 is connected to the side of the observation chamber 3 away from the air suction pipe 2 and below the air suction pipe 2, a test solution is placed inside the observation chamber 3, and the liquid level of the test solution is higher than the connection between the test tube 4 and the observation chamber 3, and lower than the connection between the air suction pipe 2 and the observation chamber 3;

[0039] Before introducing the embodiment of the present invention in detail, in order to facilitate understanding of the present invention, the product to which the embodiment of the present invention is adapted is first exemplified. Figure 3-Figure 4 The concave shell 1401 is an inward-concave shell, and its manufacturing process is one-piece molding. In subsequent production, the nozzle 1402 needs to be connected to the concave shell 1401 by laser welding. After the installation is completed, a complete test product 14 is formed. When the test product 14 is in use, its concave part will be sealed. Therefore, it is necessary to ensure that there is no gap at the welding point between the concave shell 1401 and the nozzle 1402, so it is necessary to conduct an airtightness test.

[0040] In a conventional air tightness detection device, it is difficult to observe when a micro-leakage occurs in the product to be tested, thus causing defective products to flow into the market. However, when using the embodiment of the present invention, it is first necessary to seal the inner recess of the test product 14, and then insert the test tube 4 into the plug 1402, and then start the vacuum pump inside the mounting frame 1 to start running and generate negative pressure. This negative pressure will act on the inside of the observation chamber 3 through the suction pipe 2, and then act on the inside of the test tube 4 through the observation chamber 3, and finally act on the test product 14. At this time, since the inner recess of the test product 14 is sealed, if the test product 14 is a good product, there is no gap between the inner recessed shell 1401 and the plug 1402. Therefore, the entire device is in a sealed environment at this time, and no bubbles are generated in the solution inside the observation chamber 3; if the test product 14 is a defective product, the inner recessed shell 1401 is sealed. There is a gap between 1401 and the plug 1402. External gas will enter the observation chamber 3 through the gap, and flow into the suction pipe 2 after passing through the solution inside the observation chamber 3. When the gas passes through the solution inside the observation chamber 3, bubbles will be generated. Therefore, the operator only needs to observe whether bubbles are generated in the solution inside the observation chamber 3 when the vacuum pump is turned on to judge the air tightness of the test product 14. In this way, the high cost of positive pressure inflation of traditional air tightness testing devices is avoided. At the same time, through the bubble observation method, even if there is a slight leak in the product to be tested, bubbles will be generated, which will be detected and judged as a defective product, thereby improving the accuracy of air tightness testing. It should be noted that, in order to facilitate observation, the observation chamber 3 can be made of a transparent material, and the solution inside the observation chamber 3 can also be a transparent solution.

[0041] It should be further explained that the product to which the embodiment of the present invention is applicable is not the test product 14 mentioned in this application. All sealing products similar to the test product 14 that have air inlet and outlet ends can use the embodiment of the present invention to perform air tightness testing.

[0042] like Figures 1 to 2 As shown, a test fixture 5 is fixedly mounted on the top surface of the mounting frame 1, a control box 6 is mounted on the bottom end of the mounting frame 1, and a crimping block 7 that can be raised and lowered is provided above the test fixture 5;

[0043] During operation, when conducting inspection, the test product 14 can be placed on the test fixture 5. Here, the test fixture 5 is specially customized for the test product 14, so that the plug 1402 is sealed to facilitate the inspection. Similarly, when conducting inspections on other products, it is necessary to adjust the structure in the embodiment of the present invention according to actual conditions. Without departing from the spirit and scope of the present invention, these changes and improvements fall within the scope of the invention to be protected, and no further details will be given. After the installation is completed, the test product 14 is pressed by descending the crimping block 7 to avoid the test product 14 from moving during the inspection process, causing the connection between it and the test tube 4 to loosen, thereby affecting the inspection results and further improving the accuracy of the airtightness inspection. It should also be noted that a vacuum pressure gauge is installed on the control box 6, and the data is displayed in real time. When conducting inspections, employees can also judge whether there is a leak by the value changes of the vacuum pressure gauge.

[0044] like Figures 1 to 2 As shown, the top surface of the crimping block 7 is connected to the mounting plate 8 by bolts, the top surface of the mounting plate 8 is fixed with a telescopic rod 9, the outside of the telescopic rod 9 is slidably connected to a limit frame 12, the side of the limit frame 12 away from the telescopic rod 9 is fixed with a telescopic frame 13, the telescopic frame 13 is slidably inserted into the interior of the mounting frame 1, and a driving assembly is installed on the top of the telescopic rod 9, and the driving assembly is used to drive the telescopic rod 9 to move up and down;

[0045] During operation, when the position of the crimping block 7 needs to be adjusted, the driving assembly drives the telescopic rod 9 to rise and fall, and the movement of the telescopic rod 9 drives the mounting plate 8 to move, and the movement of the mounting plate 8 drives the crimping block 7 to rise and fall; and the limit frame 12 is designed to limit the telescopic rod 9 so that it runs according to a predetermined trajectory; at the same time, the telescopic frame 13 is slidably inserted into the interior of the mounting frame 1, and the height of the crimping block 7 in the initial state can be adjusted at any time to adapt to different products.

[0046] like Figures 1 to 2 As shown, the driving assembly includes a handle 11, one end of the handle 11 is rotatably connected to the telescopic frame 13, and the handle 11 is externally rotatably connected to a pair of hinge irons 10, and the ends of the pair of hinge irons 10 away from the handle 11 are both rotatably connected to the top of the telescopic rod 9;

[0047] When working, it is necessary to explain whether Figure 1 As shown, it can be clearly seen that the end of the handle 11 close to the telescopic frame 13 is higher than the end away from the telescopic frame 13. Therefore, when in use, by holding the handle 11 and pressing it down, the hinge between it and the hinge iron 10 will move downward, thereby driving the hinge iron 10 to move downward. After the hinge iron 10 moves downward, it drives the telescopic rod 9 to move downward, and then drives the crimping block 7 to press the test product 14.

[0048] Example 2

[0049] like Figure 6 As shown, in comparison with Example 1, another embodiment of the present invention is as follows: a locking ring 15 is fixedly connected to one end of the test tube 4 away from the observation chamber 3, a cavity 16 is defined inside the locking ring 15, an annular elastic membrane 17 is fixedly connected to the inner wall of the locking ring 15 and located outside the cavity 16, and a ventilation valve 18 is fixedly connected to the outer wall of the locking ring 15, and the ventilation valve 18 is in communication with the cavity 16;

[0050] During operation, considering that the airtightness detection work needs to be carried out for a long time, and the test tube 4 will inevitably be worn during the process of continuous insertion with the test product 14, which will cause the connection between the test tube 4 and the test product 14 to be no longer tight and micro-leakage to occur, thereby affecting the correctness of the airtightness detection. For this reason, the embodiment of the present invention is designed with a locking ring 15, and one end of the locking ring 15 is fixedly connected to the test product 14. During specific use, the end of the test product 14 to be tested is inserted into the locking ring 15, and then the air exchange valve 18 is connected to the external air pump device through a pipeline. After the end of the test product 14 to be tested is inserted into the locking ring 15, gas is filled into the air exchange valve 18, and then the gas is injected into the cavity 16 through the air exchange valve 18, so that the pressure inside the cavity 16 increases, and the increased pressure causes the annular elastic membrane 17 to expand until the annular elastic membrane 17 expands to fit tightly against the test product 14. Until the end to be tested, the expanded annular elastic membrane 17 fixes the end to be tested of the test product 14 and seals it. After the test is completed, the annular elastic membrane 17 will automatically reset by simply discharging the gas inside the cavity 16. Through such a design, not only the problem of inaccurate detection effect caused by long-term wear of the test tube 4 due to long-term insertion is solved, but also the embodiment of the present invention can be adapted to more models of products, thereby improving the scope of application of the embodiment of the present invention. It should be noted that, in the initial state, the annular elastic membrane 17 is concave, that is, the annular elastic membrane 17 is bent toward the direction of the cavity 16 to facilitate the insertion of the product. It should also be noted that in actual use, the length of the annular elastic membrane 17 should be designed according to actual conditions. It should be ensured that after the detection end of the product is inserted, its port needs to be deep inside the locking ring 15 and not within the covering range of the annular elastic membrane 17 to avoid affecting the negative pressure adsorption.

[0051] like Figures 1 to 2 As shown, a plurality of pistons 19 are slidably connected inside the locking ring 15 and located on the side of the cavity 16 away from the test tube 4. A transmission rod 20 is fixedly connected to the side of the piston 19 away from the cavity 16. An extrusion plate 21 is fixedly connected to the side of the transmission rod 20 away from the piston 19. A matching slot 22 is provided inside the locking ring 15 and located outside the extrusion plate 21. Powder is placed inside the slot 22. A screen 23 is fixedly connected to the side of the slot 22 away from the extrusion plate 21.

[0052] During operation, it can be understood that a sliding groove adapted to the piston 19 is provided inside the locking ring 15, and the piston 19 slides inside it. It should be noted that the cavity 16 is connected to the sliding groove; in specific use, when the air tightness test fails, it is necessary to determine the leakage point. At this time, the embodiment of the present invention is used. When the air pressure inside the cavity 16 increases, the pressure will act on the piston 19 synchronously, thereby pushing the piston 19 to move. The movement of the piston 19 drives the transmission rod 20 to move. The movement of the transmission rod 20 drives the extrusion plate 21 to slide inside the empty slot 22, thereby spraying the powder inside the empty slot 22 through the screen 23. It should be noted that the powder here can be colored powder. The pushed-out powder floats in the air and is just located in the concave At the connection between the shell 1401 and the plug 1402, if there is a micro-leak, the powder will be sucked into the test tube 4 through the micro-leak, and some powder will remain at the micro-leak. In this way, the leakage point can be determined by the position of the powder. Furthermore, some chemical reagents can be mixed into the powder. These chemical reagents can react with the solution in the observation chamber 3 to change color to remind employees of micro-leakage. For example, some potassium permanganate can be mixed into the powder, which will change color when it comes into contact with water, thereby reminding employees to avoid inattention and failure to discover micro-leakage problems. The design of the screen 23 can screen the sprayed powder to avoid the spraying of excessive powder. Excessive powder falls too fast in the air and cannot achieve the above-mentioned effect and will fall to the ground.

[0053] like Figures 1 to 2 As shown, a magnet 24 is fixedly connected to the side of the piston 19 away from the cavity 16, and a conductive electromagnet 25 is provided on the side of the magnet 24 away from the piston 19. The conductive electromagnet 25 is fixedly connected to the locking ring 15;

[0054] During operation, in specific use, it is considered that the cases where there are problems with airtightness are mostly rare. If powder is sprayed out every time a test is performed, the consumption of powder is too large. For this reason, the magnet 24 and the electromagnet 25 are designed. The side of the magnet 24 and the electromagnet 25 that are close to each other are of the same polarity, so repulsion will be generated. By adjusting the magnetic force of the electromagnet 25, the repulsive force on the magnet 24 is adjusted to offset the increased pressure inside the cavity 16, so that the piston 19 will not move when the pressure inside the cavity 16 increases. When powder needs to be sprayed, it is only necessary to reduce the magnetic force of the electromagnet 25.

[0055] like Figures 1 to 2 As shown, a plurality of elastic blades 26 are staggered and fixedly connected to the inside of the hollow slot 22 and on a side away from the extrusion plate 21, and a plurality of through holes 27 are formed on the sides of the plurality of elastic blades 26 that are close to each other;

[0056] During operation, by designing the elastic blades 26 and the through holes 27, after injecting powder into the empty slot 22, the employee can shake the locking ring 15 to allow the powder to adhere to the elastic blades 26 and the through holes 27. In this way, when the extrusion plate 21 slides inside the empty slot 22 to generate airflow, the airflow will push the elastic blades 26 to shake, causing the powder attached to it to fall off, thereby avoiding the situation where no powder is sprayed out from the top of the empty slot 22.

[0057] A method for using an air tightness testing machine, wherein the method uses any of the air tightness testing machines described above to perform an air tightness test, comprising the following steps:

[0058] S1. Install the product to be tested;

[0059] S2, start the vacuum pump to generate negative pressure;

[0060] S3. Observe the solution inside observation chamber 3.

[0061] Furthermore, the specific installation steps in S1 are as follows:

[0062] Step 1: Place the test product 14 on the test fixture 5;

[0063] Step 2: The crimping block 7 descends to press and tighten the test product 14 to prevent it from moving;

[0064] Step 3: Insert the test tube 4 into the plug 1402 to complete the installation.

[0065] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An airtightness testing machine, characterized in that: The invention comprises a mounting frame (1), wherein a vacuum pump is installed inside the mounting frame (1), an air suction pipe (2) is installed outside the vacuum pump, an observation chamber (3) is fixedly installed at one end of the air suction pipe (2) away from the vacuum pump, a test tube (4) is connected to the observation chamber (3) on a side away from the air suction pipe (2) and located below the air suction pipe (2), a detection solution is placed inside the observation chamber (3), and the liquid level of the detection solution is higher than the connection between the test tube (4) and the observation chamber (3) and lower than the connection between the air suction pipe (2) and the observation chamber (3).

2. The airtightness testing machine according to claim 1, characterized in that: A test fixture (5) is fixedly mounted on the top surface of the mounting frame (1), a control box (6) is mounted on the bottom end of the mounting frame (1), and a crimping block (7) that can be raised and lowered is provided above the test fixture (5).

3. The airtightness testing machine according to claim 2, characterized in that: The top surface of the crimping block (7) is connected to a mounting plate (8) via bolts, the top surface of the mounting plate (8) is fixedly connected to a telescopic rod (9), the outside of the telescopic rod (9) is slidably connected to a limiting frame (12), a side of the limiting frame (12) away from the telescopic rod (9) is fixedly connected to a telescopic frame (13), the telescopic frame (13) is slidably plugged into the interior of the mounting frame (1), and a driving component is installed on the top of the telescopic rod (9), and the driving component is used to drive the telescopic rod (9) to rise and fall.

4. The airtightness testing machine according to claim 3, characterized in that: The driving assembly comprises a handle (11), one end of the handle (11) is rotatably connected to a telescopic frame (13), the outside of the handle (11) is rotatably connected to a pair of hinged irons (10), and the ends of the pair of hinged irons (10) away from the handle (11) are both rotatably connected to the top end of the telescopic rod (9).

5. The airtightness testing machine according to claim 4, characterized in that: A locking ring (15) is fixedly connected to one end of the test tube (4) away from the observation chamber (3), a cavity (16) is provided inside the locking ring (15), an annular elastic membrane (17) is fixedly connected to the inner wall of the locking ring (15) and located outside the cavity (16), and a ventilation valve (18) is fixedly connected to the outer wall of the locking ring (15), and the ventilation valve (18) is communicated with the cavity (16).

6. The airtightness testing machine according to claim 5, characterized in that: A plurality of pistons (19) are slidably connected inside the locking ring (15) and located on the side of the cavity (16) away from the test tube (4); a transmission rod (20) is fixedly connected to the side of the piston (19) away from the cavity (16); an extrusion plate (21) is fixedly connected to the side of the transmission rod (20) away from the piston (19); a matching empty groove (22) is provided inside the locking ring (15) and located outside the extrusion plate (21); powder is placed inside the empty groove (22); and a screen (23) is fixedly connected to the side of the empty groove (22) away from the extrusion plate (21).

7. The airtightness testing machine according to claim 6, characterized in that: A magnet (24) is fixedly connected to the side of the piston (19) away from the cavity (16), and a conductive electromagnet (25) is provided on the side of the magnet (24) away from the piston (19). The conductive electromagnet (25) is fixedly connected to the locking ring (15).

8. The airtightness testing machine according to claim 7, characterized in that: A plurality of elastic blades (26) are staggered and fixedly connected inside the empty slot (22) and on a side away from the extrusion plate (21), and a plurality of through holes (27) are provided on the sides of the plurality of elastic blades (26) close to each other.

9. A method for using an airtightness tester, wherein the method uses the airtightness tester according to any one of claims 1 to 8 to perform an airtightness test, characterized in that: The following steps are involved: S1. Install the product to be tested; S2, start the vacuum pump to generate negative pressure; S3. Observe the solution inside the observation chamber (3).

10. The method for using the airtightness testing machine according to claim 9, characterized in that: The specific installation steps in S1 are as follows: Step 1: Place the test product (14) on the test fixture (5); Step 2: The crimping block (7) descends to press and tighten the test product (14) to prevent it from moving; Step 3: Insert the test tube (4) into the plug (1402) to complete the installation.

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