Airtightness test equipment

Abstract

The utility model discloses an air tightness test device which comprises a device section bar frame, one side of the inner wall of the device section bar frame is connected with an air source processing and valve rod air tightness test part, and one side of the valve rod air tightness test part is connected with a plunger pump detection station and a normally open valve detection station. One side of the equipment profile frame is connected with an auxiliary console, one side of the auxiliary console is connected with a right start button and a left start button, the top end of the equipment profile frame is connected with a three-color tower lamp, one side of the equipment profile frame is connected with a main control panel, and the valve rod airtightness testing part comprises a first mounting seat. A transplanting rodless cylinder is connected to the top end of the first mounting seat, and a lifting air cylinder is connected to one end of the transplanting rodless cylinder. The device is stable in structure, simple in operation, high in judgment accuracy and good in consistency, reduces the labor intensity of operators, guarantees the personal safety of the operators, and can automatically carry out the air tightness test of the valve rod.

Description

Technical Field

[0001] The utility model relates to the technical field of airtight detection, in particular to an airtight test device. Background Technique

[0002] With the development of the automotive industry, the requirements for the active safety of vehicle driving are also getting higher and higher. The HCU is an ABS actuator, which generally consists of a pressure increasing valve (normally open valve), a pressure reducing valve (normally closed valve), a liquid return pump, and an accumulator. The pressure increasing valve and the pressure reducing valve are controlled by the ECU signal to realize the opening and closing of the liquid path, so as to realize the braking process of normal, pressure maintaining, pressure reducing, and pressure increasing. "ABS" means "Anti-lock Braking System" in Chinese. It is an automotive safety control system that can prevent the loss of control of the direction and wheel skidding during emergency braking, prevent the wheels from being locked during braking, prevent the tires from rubbing against the ground at one point, thereby increasing the friction force, enabling the vehicle to still turn during braking, ensuring the stability of the braking direction of the vehicle, and at the same time reducing the brake consumption and extending the service life of the brake drum, disc, and tires by two times.

[0003] Considering that people are paying more and more attention to safety, the demand for HCU is also increasing. Correspondingly, the demand for each component inside the HCU is also increasing. There is no ready-made performance test device on the market at present, resulting in the need for manual detection by workers during airtightness detection, with low efficiency, high error rate, high contingency, and being greatly affected by the environment, and high labor intensity for personnel. Content of the Utility Model

[0004] The purpose of the utility model is to provide an airtight test device to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: It includes an equipment profile frame. On one side of the inner wall of the equipment profile frame, an air source treatment and valve stem airtight test part is connected and arranged. On one side of the valve stem airtight test part, a plunger pump detection station and a normally open valve detection station are connected and arranged. On one side of the equipment profile frame, a sub-control console is connected and arranged. On one side of the sub-control console, a right start button and a left start button are connected and arranged. On the top of the equipment profile frame, a three-color tower light is connected and arranged. On one side of the equipment profile frame, a main control panel is connected and arranged.

[0006] The valve stem airtightness test section includes a first mounting base. At the top of the first mounting base, a transplanting rodless cylinder is connected and arranged. At one end of the transplanting rodless cylinder, a lifting cylinder is connected and arranged. At one end of the lifting cylinder, a material taking slide cylinder is connected and arranged. At one end of the material taking slide cylinder, a material taking air gripper is connected and arranged. At the top of the first mounting base, a seal test fixture transplanting cylinder is connected and arranged. At one end of the seal test fixture transplanting cylinder, a seal test fixture is connected and arranged. At the top of the first mounting base, a test pressing down cylinder is connected and arranged. At the bottom end of the test pressing down cylinder, a test pressing head is connected and arranged. At the top of the first mounting base, a blowing material positioning pressing head extending cylinder is connected and arranged. At the bottom end of the blowing material positioning pressing head extending cylinder, a blowing material positioning pressing head is connected and arranged. At the top of the first mounting base, a vibrating bowl is connected and arranged. At the top of the first mounting base, a cutting material cylinder is connected and arranged. At one end of the cutting material cylinder, a cutting material block is connected and arranged. At the top of the first mounting base, a blowing material nozzle is connected and arranged. The blowing material nozzle is connected and communicated with the seal test fixture through a trachea. At the top of the first mounting base, a defective product bin, a blanking chute and an airtightness tester are connected and arranged. The blanking chute is located below the material taking slide cylinder. The airtightness tester is located on one side of the cutting material cylinder. The defective product bin is located on one side of the transplanting rodless cylinder.

[0007] Preferably, the plunger pump detection station includes a second mounting base. At the top of the second mounting base, a first support frame is connected and arranged. At the top of the first support frame, a pressing down cylinder one is connected and arranged. The bottom end of the pressing down cylinder one penetrates through the first support frame and a upper test tooling is connected and arranged. At the top of the second mounting base, a lower test tooling one is connected and arranged. At the top of the lower test tooling one, a product to be tested one is connected and arranged. On one side of the pressing down cylinder one, there is...

[0008] Preferably, the product to be tested one is located directly below the upper test tooling.

[0009] Preferably, the normally open valve detection station includes a third mounting base. At the top of the third mounting base, a second support frame is connected and arranged. At the top of the second support frame, a pressing down cylinder two is connected and arranged. The bottom end of the pressing down cylinder two penetrates through the second support frame and a upper pressing head is connected and arranged. Inside the upper pressing head, a control coil is connected and arranged. At the top of the third mounting base, a lower test tooling two is connected and arranged. At the top of the lower test tooling two, a product to be tested two is connected and arranged. On one side of the pressing down cylinder two, a control solenoid valve is connected and arranged.

[0010] Preferably, at the top of the upper pressing head, an adapter frame is connected and arranged, and the adapter frame is slidably connected to the third mounting base.

[0011] Preferably, it includes a housing. On one side of the housing, there is... On one side, there are a start button, a manual / automatic conversion button and an emergency stop button.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The present utility model realizes automatic loading and unloading, automatic judgment of airtight performance, and classification of defective and non-defective products after judgment by automatically performing airtightness tests on the valve stem. There are auxiliary workstations on both sides of the equipment that can detect the airtight performance of the plunger pump and the normally open valve, ensuring the detection effect, improving production quality, with simple operation, high judgment accuracy, good consistency, and reducing the labor intensity of operators.

[0014] 2. The present utility model also places the test piece in the lower test tooling, then presses the start button, and then the pressing cylinder drives the upper pressing head to descend. After reaching the position, the PLC controls the control coil according to the set program, and then the leak detector performs tests according to the pre-set parameters and programs. The three-color tower light on the side displays the test results. Also, place the test piece in the lower test tooling, then press the start button, and then the pressing cylinder drives the upper test tooling to descend. After reaching the position, the leak detector performs tests according to the pre-set parameters and programs, and the three-color tower light on the side displays the test results. It has a stable structure, simple appearance, simple operation, automatic testing and automatic screening, reducing the production time and personnel input required, greatly improving production efficiency, ensuring the personal safety of operators, and being able to automatically perform airtightness tests on the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is an exploded view of the structure of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the valve stem airtight test part of the present utility model;

[0018] Figure 4 is a schematic structural diagram of the plunger pump test part of the present utility model;

[0019] Figure 5 is a schematic structural diagram of the normally open valve test part of the present utility model;

[0020] Figure 6 is a schematic structural diagram of the front control panel of the present utility model;

[0021] Figure 7 is a working flow chart of the present utility model.

[0022] In the figure: 1. Three-color tower light; 2. Equipment profile frame; 3. Air source processing; 4. Valve stem air tightness test part; 41. First mounting seat; 4-1. Test down-pressure cylinder; 4-2. Test pressure head; 4-3. Pick-up air claw; 4-4. Pick-up slide cylinder; 4-5. Unloading slide; 4-6. Lifting cylinder; 4-7. Transplanting rodless cylinder; 4-8. Defective material box; 4-9. Cutting block; 4-10. Blowing air nozzle; 4-11. Test button; 4-12. Vibrating plate; 4-13. Air tightness tester; 4-14. Cutting cylinder; 4-15. Sealing test fixture transplanting cylinder; 4-16. Sealing test fixture; 4-17. Blowing positioning pressure head; 4-18. Blowing positioning pressure head extending cylinder; 5. Emergency stop button; 6. Right start button ;7. Auxiliary control console;8. Left start button;9. Plunger pump detection station;901. Second mounting seat;902. First support frame;9-1. Down-pressure cylinder one;9-2. Upper test fixture;9-3. Product to be tested one;9-4. Lower test fixture one;9-5. Control solenoid valve;10. Normally open valve detection station;101. Third mounting seat;102. Second support frame;10-1. Down-pressure cylinder two;10-2. Control coil;10-3. Upper pressure head;10-4. Product to be tested two;10-5. Lower test fixture two;10-6. Control solenoid valve;11. Main control panel;111. Shell;11-1. Touch screen;11-2. Start button;11-3. Manual / automatic conversion button;11-4. Emergency stop button. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] See also Figure 1-3 The utility model provides a technical solution: including an equipment profile frame 2, an air source treatment 3 and a valve stem air tightness test part 4 are connected to one side of the inner wall of the equipment profile frame 2, a plunger pump detection station 9 and a normally open valve detection station 10 are connected to one side of the valve stem air tightness test part 4, a sub-control console 7 is connected to one side of the equipment profile frame 2, a right start button 6 and a left start button 8 are connected to one side of the sub-control console 7, a three-color tower lamp 1 is connected to the top of the equipment profile frame 2, and a main control panel 11 is connected to one side of the equipment profile frame 2;

[0026] The valve stem airtight test section 4 includes a first mounting base 41. At the top of the first mounting base 41, a transplanting rodless cylinder 4-7 is connected and arranged. At one end of the transplanting rodless cylinder 4-7, a lifting cylinder 4-6 is connected and arranged. At one end of the lifting cylinder 4-6, a material taking slide cylinder 4-4 is connected and arranged. At one end of the material taking slide cylinder 4-4, a material taking air gripper 4-3 is connected and arranged. At the top of the first mounting base 41, a seal test fixture transplanting cylinder 4-15 is connected and arranged. At one end of the seal test fixture transplanting cylinder 4-15, a seal test fixture 4-16 is connected and arranged. At the top of the first mounting base 41, a test pressing cylinder 4-1 is connected and arranged. At the bottom end of the test pressing cylinder 4-1, a test pressing head 4-2 is connected and arranged. At the top of the first mounting base 41, a blowing material positioning pressing head extending cylinder 4-18 is connected and arranged. At the bottom end of the blowing material positioning pressing head extending cylinder 4-18, a blowing material positioning pressing head 4-17 is connected and arranged. At the top of the first mounting base 41, a vibrating bowl 4-12 is connected and arranged. At the top of the first mounting base 41, a material cutting cylinder 4-14 is connected and arranged. At one end of the material cutting cylinder 4-14, a material cutting block 4-9 is connected and arranged. At the top of the first mounting base 41, a blowing material nozzle 4-10 is connected and arranged. The blowing material nozzle 4-10 is connected and communicated with the seal test fixture 4-16 through a trachea. At the top of the first mounting base 41, a defective product bin 4-8, a blanking chute 4-5 and an airtightness tester 4-13 are connected and arranged. The blanking chute 4-5 is located below the material taking slide cylinder 4-4. The airtightness tester 4-13 is located on one side of the material cutting cylinder 4-14. The defective product bin 4-8 is located on one side of the transplanting rodless cylinder 4-7.

[0027] Working principle: When this utility model is in use, first, the valve stem to be tested is placed into the vibrating bowl 4-12, and then feeding is carried out through the vibrating bowl 4-12. When the material is transported into the material cutting block 4-9 and detected by the sensor, the material cutting cylinder 4-14 pushes the material cutting block 4-9 to cut the material. The seal test fixture 4-16 moves to directly below the blowing material positioning pressing head 4-17, and then the blowing material positioning pressing head extending cylinder 4-18 pushes out the blowing material positioning pressing head 4-17. Subsequently, the blowing material nozzle 4-10 blows the valve stem into the seal test fixture 4-16 through the trachea. Then, the blowing material positioning pressing head extending cylinder 4-18 retracts. The seal test fixture transplanting cylinder 4-15 drives the seal test fixture 4-16 to move below the test pressing head 4-2. After arriving, the test pressing cylinder 4-1 extends. After extending in place, the airtightness tester 4-13 conducts tests according to the set parameters and procedures. After the test is completed, the material taking slide cylinder 4-4 drives the material taking air gripper 4-3 to extend to clamp the tested valve stem, and then the lifting cylinder 4-6 extends to lift the material taking air gripper 4-3 and at the same time lift the valve stem away from the seal test fixture 4-16. Then, the transplanting rodless cylinder 4-7 moves the material taking air gripper 4-3 above the blanking chute 4-5 or the defective product bin 4-8 according to the test result, and then puts the valve stem into it.

[0028] Embodiment 2:

[0029] Please refer to Figure 1-5 , the present utility model provides a technical solution: including an equipment profile frame 2, on one side of the inner wall of the equipment profile frame 2, an air source treatment 3 and a valve stem airtight test part 4 are connected and arranged, on one side of the valve stem airtight test part 4, a plunger pump detection station 9 and a normally open valve detection station 10 are connected and arranged, on one side of the equipment profile frame 2, a sub-control console 7 is connected and arranged, on one side of the sub-control console 7, a 5, a right start button 6 and a left start button 8 are connected and arranged, on the top of the equipment profile frame 2, a three-color tower light 1 is connected and arranged, on one side of the equipment profile frame 2, a main control panel 11 is connected and arranged;

[0030] The valve stem airtight test part 4 includes a first mounting seat 41, on the top of the first mounting seat 41, a transplanting rodless cylinder 4-7 is connected and arranged, at one end of the transplanting rodless cylinder 4-7, a lifting cylinder 4-6 is connected and arranged, at one end of the lifting cylinder 4-6, a material taking slide cylinder 4-4 is connected and arranged, at one end of the material taking slide cylinder 4-4, a material taking air gripper 4-3 is connected and arranged, on the top of the first mounting seat 41, a sealing test fixture transplanting cylinder 4-15 is connected and arranged, at one end of the sealing test fixture transplanting cylinder 4-15, a sealing test fixture 4-16 is connected and arranged, on the top of the first mounting seat 41, a test pressing cylinder 4-1 is connected and arranged, at the bottom end of the test pressing cylinder 4-1, a test pressing head 4-2 is connected and arranged, on the top of the first mounting seat 41, a blowing positioning pressing head extending cylinder 4-18 is connected and arranged, at the bottom end of the blowing positioning pressing head extending cylinder 4-18, a blowing positioning pressing head 4-17 is connected and arranged, on the top of the first mounting seat 41, a vibrating disk 4-12 is connected and arranged, on the top of the first mounting seat 41, a cutting cylinder 4-14 is connected and arranged, at one end of the cutting cylinder 4-14, a cutting block 4-9 is connected and arranged, on the top of the first mounting seat 41, a blowing air nozzle 4-10 is connected and arranged, the blowing air nozzle 4-10 is connected and communicated with the sealing test fixture 4-16 through an air pipe, on the top of the first mounting seat 41, a defective product material box 4-8, a blanking chute 4-5 and an airtight tester 4-13 are connected and arranged, the blanking chute 4-5 is located below the material taking slide cylinder 4-4, the airtight tester 4-13 is located on one side of the cutting cylinder 4-14, and the defective product material box 4-8 is located on one side of the transplanting rodless cylinder 4-7.

[0031] Preferably, the normally open valve detection station 10 includes a third mounting seat 101, on the top of the third mounting seat 101, a second support frame 102 is connected and arranged, on the top of the second support frame 102, a second pressing cylinder 10-1 is connected and arranged, the bottom end of the second pressing cylinder 10-1 penetrates through the second support frame 102 and is connected and arranged with an upper pressing head 10-3, inside the upper pressing head 10-3, a control coil 10-2 is connected and arranged, on the top of the third mounting seat 101, a second lower test tooling 10-5 is connected and arranged, on the top of the second lower test tooling 10-5, a product to be tested 10-4 is connected and arranged, and on one side of the second pressing cylinder 10-1, a control solenoid valve 10-6 is connected and arranged.

[0032] Preferably, a connection frame is provided at the top end of the upper pressure head 10-3, and the connection frame is slidably connected to the third mounting seat 101.

[0033] Working principle: When this utility model is in use, first place the workpiece to be tested into the lower test tooling 10-5, then press the start button. Subsequently, the lower pressure cylinder 10-1 drives the upper pressure head 10-3 to descend. After reaching the position, the PLC controls the control coil 10-2 according to the set program, and then the leak detector performs tests according to the pre-set parameters and programs, and the side three-color tower light 1 displays the test results.

[0034] Embodiment 3:

[0035] Please refer to Figure 1-6 , this utility model provides a technical solution: including an equipment profile frame 2, a gas source treatment 3 and a valve stem airtight test part 4 are connected and arranged on one side of the inner wall of the equipment profile frame 2. A plunger pump detection station 9 and a normally open valve detection station 10 are connected and arranged on one side of the valve stem airtight test part 4. A sub-control console 7 is connected and arranged on one side of the equipment profile frame 2. A right start button 6 and a left start button 8 are connected and arranged on one side of the sub-control console 7. A three-color tower light 1 is connected and arranged at the top end of the equipment profile frame 2. A main control panel 11 is connected and arranged on one side of the equipment profile frame 2;

[0036] The valve stem airtight test part 4 includes a first mounting seat 41. A transplanting rodless cylinder 4-7 is connected and arranged at the top end of the first mounting seat 41. A lifting cylinder 4-6 is connected and arranged at one end of the transplanting rodless cylinder 4-7. A material taking slide cylinder 4-4 is connected and arranged at one end of the lifting cylinder 4-6. A material taking air gripper 4-3 is connected and arranged at one end of the material taking slide cylinder 4-4. A sealing test fixture transplanting cylinder 4-15 is connected and arranged at the top end of the first mounting seat 41. A sealing test fixture 4-16 is connected and arranged at one end of the sealing test fixture transplanting cylinder 4-15. A test lower pressure cylinder 4-1 is connected and arranged at the top end of the first mounting seat 41. A test pressure head 4-2 is connected and arranged at the bottom end of the test lower pressure cylinder 4-1. A blowing and positioning pressure head extending cylinder 4-18 is connected and arranged at the top end of the first mounting seat 41. A blowing and positioning pressure head 4-17 is connected and arranged at the bottom end of the blowing and positioning pressure head extending cylinder 4-18. A vibrating plate 4-12 is connected and arranged at the top end of the first mounting seat 41. A cutting cylinder 4-14 is connected and arranged at the top end of the first mounting seat 41. A cutting block 4-9 is connected and arranged at one end of the cutting cylinder 4-14. A blowing air nozzle 4-10 is connected and arranged at the top end of the first mounting seat 41. The blowing air nozzle 4-10 is connected and communicated with the sealing test fixture 4-16 through a trachea. A defective product bin 4-8, a blanking chute 4-5 and an airtight tester 4-13 are connected and arranged at the top end of the first mounting seat 41. The blanking chute 4-5 is located below the material taking slide cylinder 4-4. The airtight tester 4-13 is located on one side of the cutting cylinder 4-14. The defective product bin 4-8 is located on one side of the transplanting rodless cylinder 4-7.

[0037] Preferably, the plunger pump detection station 9 includes a second mounting base 901. A first support frame 902 is connected to the top of the second mounting base 901. A first downward pressing cylinder 9-1 is connected to the top of the first support frame 902. The bottom end of the first downward pressing cylinder 9-1 penetrates through the first support frame 902 and is connected with an upper test tooling 9-2. A first lower test tooling 9-4 is connected to the top of the second mounting base 901. A first product to be tested 9-3 is connected to the top of the first lower test tooling 9-4. A 9-5 is connected to one side of the first downward pressing cylinder 9-1.

[0038] Preferably, the first product to be tested 9-3 is located directly below the upper test tooling 9-2.

[0039] Working principle: When this utility model is in use, first place the part to be tested into the lower test tooling 9-4, then press the start button. Subsequently, the first downward pressing cylinder 9-1 drives the upper test tooling 9-2 to descend. After reaching the position, the leak detector conducts tests according to the pre-set parameters and procedures, and the side three-color tower lamp 1 displays the test results.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0041] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An airtightness testing device, comprising a device profile frame (2), characterized in that: An air source treatment device (3) and a valve stem air tightness test unit (4) are connected to one side of the inner wall of the equipment profile frame (2); a plunger pump detection station (9) and a normally open valve detection station (10) are connected to one side of the valve stem air tightness test unit (4); an auxiliary control console (7) is connected to one side of the equipment profile frame (2); an emergency stop button (5), a right start button (6) and a left start button (8) are connected to one side of the auxiliary control console (7); a three-color tower light (1) is connected to the top of the equipment profile frame (2); and a main control panel (11) is connected to one side of the equipment profile frame (2); The valve stem air tightness test part (4) comprises a first mounting seat (41), the top end of the first mounting seat (41) is connected to a transplanting rodless cylinder (4-7), one end of the transplanting rodless cylinder (4-7) is connected to a lifting cylinder (4-6), one end of the lifting cylinder (4-6) is connected to a material picking slide cylinder (4-4), one end of the material picking slide cylinder (4-4) is connected to a material picking air claw (4-3), and the top end of the first mounting seat (41) is connected to A sealing test fixture transfer cylinder (4-15), one end of which is connected to a sealing test fixture (4-16), the top end of the first mounting seat (41) is connected to a test downward pressure cylinder (4-1), the bottom end of the test downward pressure cylinder (4-1) is connected to a test pressure head (4-2), the top end of the first mounting seat (41) is connected to a blowing positioning pressure head extension cylinder (4-18), the blowing positioning pressure head extension cylinder (4-18) is connected to the bottom end of the first mounting seat (41), and the blowing positioning pressure head extension cylinder (4-18) is connected to the bottom end of the first mounting seat (41). The bottom end of the air outlet cylinder (4-18) is connected to a blowing positioning pressure head (4-17), the top end of the first mounting seat (41) is connected to a vibration plate (4-12), the top end of the first mounting seat (41) is connected to a cutting cylinder (4-14), one end of the cutting cylinder (4-14) is connected to a cutting block (4-9), the top end of the first mounting seat (41) is connected to a blowing air nozzle (4-10), and the blowing air nozzle (4-10) is connected to the air outlet cylinder (4-18 ...). The tube is connected to the sealing test fixture (4-16), and the top of the first mounting seat (41) is connected to a defective material box (4-8), a material discharge slide (4-5) and an airtightness tester (4-13), the material discharge slide (4-5) is located below the material taking slide cylinder (4-4), the airtightness tester (4-13) is located on one side of the cutting cylinder (4-14), and the defective material box (4-8) is located on one side of the transplanting rodless cylinder (4-7).

2. The airtight testing device according to claim 1, characterized in that: The plunger pump inspection station (9) comprises a second mounting seat (901), the top end of the second mounting seat (901) is connected to a first support frame (902), the top end of the first support frame (902) is connected to a downward pressure cylinder (9-1), the bottom end of the downward pressure cylinder (9-1) passes through the first support frame (902) and is connected to an upper test fixture (9-2), the top end of the second mounting seat (901) is connected to a lower test fixture (9-4), the top end of the lower test fixture (9-4) is connected to a product to be tested (9-3), and one side of the downward pressure cylinder (9-1) is connected to a control solenoid valve (9-5).

3. The airtight testing device according to claim 2, characterized in that: The product to be tested (9-3) is located directly below the upper testing tool (9-2).

4. The airtight testing device according to claim 1, characterized in that: The normally open valve detection station (10) comprises a third mounting seat (101), the top end of the third mounting seat (101) is connected to a second support frame (102), the top end of the second support frame (102) is connected to a second downward pressure cylinder (10-1), the bottom end of the second downward pressure cylinder (10-1) passes through the second support frame (102) and is connected to an upper pressure head (10-3), the inner side of the upper pressure head (10-3) is connected to a control coil (10-2), the top end of the third mounting seat (101) is connected to a second lower test fixture (10-5), the top end of the second lower test fixture (10-5) is connected to a second product to be tested (10-4), and one side of the second downward pressure cylinder (10-1) is connected to a control solenoid valve (10-6).

5. The airtight testing device according to claim 4, characterized in that: A connecting frame is connected to the top end of the upper pressure head (10-3), and the connecting frame is slidably connected to the third mounting seat (101).

6. The airtight testing device according to claim 1, characterized in that: The (11) comprises a shell (111), one side of the shell (111) is provided with (11-1), and one side of the (111) is provided with a start button (11-2), a manual / automatic conversion button (11-3) and an emergency stop button (11-4).

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