Vacuum pump air tightness detection device

Abstract

The utility model relates to the field of vacuum pump production devices, in particular to a vacuum pump air tightness detection device which comprises a water tank, a top plate is fixed to the water tank, a supporting shaft is fixed to the top plate, a cover plate is arranged above the top plate, a supporting pipe is fixed to the cover plate, and the supporting shaft penetrates through the supporting pipe and is rotationally connected with the supporting pipe. A supporting ring used in cooperation with the cover plate is further fixed to the water tank, an exhaust pipe with a valve is further fixed to the cover plate, a rotating shaft is further arranged in the water tank and fixed to the output end of an overturning motor, a connecting plate is further fixed to the rotating shaft, and a fixing pipe is fixed to the tail end of the connecting plate. An air bag is fixed in the fixing pipe, the air bag is connected with an air pump through an air inlet pipe, an overflow pipe with a valve is further fixed on the water tank, an observation pipe is fixed on the overflow pipe, and a sliding block is arranged in the observation pipe. The device can test the air tightness of the pump body of the vacuum pump.

Description

Technical Field

[0001] This invention relates to the field of vacuum pump production equipment, and more particularly to a vacuum pump airtightness testing device. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and create a vacuum. The airtightness of a vacuum pump directly affects its ultimate vacuum; therefore, the airtightness of a vacuum pump needs to be checked. Patent application number CN202310457541.6 discloses a vacuum pump airtightness testing device, including a testing chamber body. A testing water chamber containing water is located at the bottom of the testing chamber body. A drying mechanism with a drying cavity is arranged above the testing water chamber. The testing chamber body also has an observation window adapted to the position of the testing water chamber. A support turntable is located on one side of the testing chamber body. The side of the support turntable close to the testing chamber body is secured to the vacuum pump under test by a clamping mechanism. The support turntable is connected to a drive motor, which drives the support turntable to rotate, thereby causing the vacuum pump under test to enter the water in the testing water chamber or the drying cavity of the drying mechanism. The presence of air bubbles in the water in the testing water chamber is observed through the observation window to determine whether the airtightness of the vacuum pump under test is problematic. However, because water can dissolve a certain amount of air, when the vacuum pump leaks slowly, the air bubbles in the water are not easily detected, making it impossible to accurately detect whether the vacuum pump has a leakage problem.

[0003] This invention was proposed in response to the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vacuum pump airtightness testing device.

[0005] This invention can be achieved through the following technical solutions:

[0006] This invention discloses a vacuum pump airtightness testing device, comprising a water tank, a top plate fixed on the water tank, a support shaft fixed on the top plate, a cover plate above the top plate, a support tube fixed on the cover plate, the support shaft passing through the support tube and rotatably connected to the support tube, a support ring for use with the cover plate fixed on the water tank, an exhaust pipe with a valve fixed on the cover plate, a rotating shaft inside the water tank, the rotating shaft being fixed to the output end of a flip motor, a connecting plate fixed on the rotating shaft, a fixing pipe fixed at the end of the connecting plate, an air bladder fixed inside the fixing pipe, the air bladder being connected to an air pump through an air inlet pipe, an inflation pipe fixed on the air pump, an overflow pipe with a valve fixed on the water tank, an observation pipe fixed on the overflow pipe, a valve fixed on the observation pipe, and a slider inside the observation pipe. A certain amount of water is injected into the water tank. The vacuum pump body is placed inside the fixed tube. Gas is filled into the air bladder using an air pump. After the air bladder inflates, the pump body is fixed inside the fixed tube. After the pump body is fixed, the inflation pipe is connected to the air inlet of the pump body. The flip motor is started, driving the rotating shaft to rotate. The fixed tube rotates around the rotating shaft. After the fixed tube enters the water in the water tank, the cover plate is flipped over, covering the support ring to seal the water tank. The exhaust pipe is then opened, and water is discharged into the water tank through the water inlet pipe. After the water tank is full of water, the water inlet pipe and the exhaust pipe are closed. Connect the pipe and close the valve on the overflow pipe, then open the valve on the observation pipe. Inflate the pump body with air through the air inlet pipe and observe whether the colored slider inside the observation pipe moves. When the pump body leaks air, the gas enters the sealed water tank, increasing the pressure inside the tank. The pressure on both sides of the slider becomes unequal, and the water in the tank enters the observation pipe, pushing the slider to move. By observing the movement of the slider through the observation pipe, you can confirm whether the pump body is leaking air. This device can perform airtightness testing on the pump body of a vacuum pump and confirm whether the vacuum pump is leaking air by observing whether the slider moves. It is very convenient to operate.

[0007] Preferably, a sealing ring is also fixed on the cover plate.

[0008] Preferably, multiple positioning rods are fixed on the top plate, and positioning shafts are fixed on the cover plate at positions corresponding to the positioning rods. Positioning tubes are provided on the positioning shafts, and cylinders that are rotatably connected to the positioning rods are provided on the positioning rods. The piston rod ends of the cylinders are fixed to the corresponding positioning tubes.

[0009] Preferably, the observation tube is made of glass.

[0010] Preferably, a water inlet pipe is also fixed on the water tank.

[0011] Compared with existing technologies, the present invention has the following advantages:

[0012] This device can perform airtightness tests on the pump body of a vacuum pump and confirm whether the vacuum pump is leaking by observing whether the slider moves, making it very convenient to operate. Attached Figure Description

[0013] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a top view of the present invention;

[0016] Figure 3 for Figure 2 Sectional view at point AA;

[0017] In the diagram: 1. Water tank; 2. Top plate; 3. Support shaft; 4. Cover plate; 5. Support pipe; 6. Positioning shaft; 7. Positioning rod; 8. Cylinder; 9. Positioning pipe; 10. Exhaust pipe; 11. Support ring; 12. Sealing ring; 13. Rotating shaft; 14. Tilting motor; 15. Fixing pipe; 16. Air inlet pipe; 17. Airbag; 18. Connecting plate; 19. Pump body; 20. Inflation pipe; 21. Water inlet pipe; 22. Overflow pipe; 23. Observation tube; 24. Slider; Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0019] Example 1:

[0020] like Figures 1 to 3As shown, this embodiment discloses a vacuum pump airtightness testing device, including a water tank 1, a top plate 2 fixed on the water tank 1, a support shaft 3 fixed on the top plate 2, a cover plate 4 above the top plate 2, a support tube 5 fixed on the cover plate 4, the support shaft 3 passing through the support tube 5 and rotatably connected to the support tube 5, a support ring 11 for use with the cover plate 4 fixed on the water tank 1, an exhaust pipe 10 with a valve fixed on the cover plate 4, a rotating shaft 13 inside the water tank 1, the rotating shaft 13 being fixed to the output end of a flip motor 14, a connecting plate 18 fixed on the rotating shaft 13, a fixing pipe 15 fixed at the end of the connecting plate 18, an airbag 17 fixed inside the fixing pipe 15, the airbag 17 being connected to an air pump through an air inlet pipe 16, an inflation pipe 20 fixed on the air pump, an overflow pipe 22 with a valve fixed on the water tank 1, an observation pipe 23 fixed on the overflow pipe 22, a valve fixed on the observation pipe 23, and a slider 24 inside the observation pipe 23. A certain amount of water is injected into the water tank 1. The pump body 19 of the vacuum pump is placed inside the fixed tube 15. Gas is filled into the air bag 17 by the air pump. After the air bag 17 expands, it will fix the pump body 19 into the fixed tube 15. After the pump body 19 is fixed, the inflation pipe 20 is connected to the air inlet of the pump body 19. The flip motor 14 is started, and the flip motor 14 drives the rotating shaft 13 to rotate. The fixed tube 15 rotates around the rotating shaft 13. After the fixed tube 15 enters the water in the water tank 1, the cover plate 4 is flipped to cover the support ring 11 and seal the water tank 1. The exhaust pipe 10 is opened, and water is discharged into the water tank 1 through the water inlet pipe 21. After the water tank 1 is full of water, the water inlet pipe is closed. Connect the exhaust pipe 10 and the overflow pipe 22, and open the valve on the observation pipe 23. Inflate the pump body 19 through the air inlet pipe 20. Observe whether the colored slider 24 in the observation pipe 23 is sliding. When the pump body 19 leaks air, the gas enters the sealed water tank 1, the pressure in the water tank 1 increases, and the pressure on both sides of the slider 24 is not equal. The water in the water tank 1 enters the observation pipe 23 and pushes the slider 24 to move. The movement of the slider 24 is confirmed by the observation pipe 23, thereby confirming whether the pump body 19 is leaking air. This device can perform airtightness testing on the pump body 19 of the vacuum pump and confirm whether the vacuum pump is leaking air by observing whether the slider 24 is moving. It is very convenient to operate.

[0021] Among them, multiple positioning rods 7 are fixed on the top plate 2, and positioning shafts 6 are fixed on the cover plate 4 at positions corresponding to the positioning rods 7. Positioning tubes 9 are provided on the positioning shafts 6, and cylinders 8 are provided on the positioning rods 7 for rotational connection. The piston rod ends of the cylinders 8 are fixed to the corresponding positioning tubes 9.

[0022] The observation tube 23 is made of glass.

[0023] Water tank 1 is also equipped with a water inlet pipe 21.

[0024] Example 2:

[0025] This embodiment discloses a vacuum pump airtightness testing device. Based on the structure and principle of Embodiment 1, a sealing ring 12 is also fixed on the cover plate 4 of this embodiment.

[0026] The above are merely preferred embodiments of the present invention. It should be noted that, for those skilled in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be considered within the scope of protection of the present invention.

Claims

1. A vacuum pump airtightness testing device, comprising a water tank, characterized in that, A top plate is fixed to the water tank, a support shaft is fixed to the top plate, a cover plate is provided above the top plate, a support pipe is fixed to the cover plate, the support shaft passes through the support pipe and is rotatably connected to the support pipe, a support ring that cooperates with the cover plate is also fixed to the water tank, an exhaust pipe with a valve is also fixed to the cover plate, a rotating shaft is also provided inside the water tank, the rotating shaft is fixed to the output end of the flip motor, a connecting plate is also fixed to the rotating shaft, a fixing pipe is fixed to the end of the connecting plate, an airbag is fixed inside the fixing pipe, the airbag is connected to an air pump through an air inlet pipe, an inflation pipe is also fixed to the air pump, an overflow pipe with a valve is also fixed to the water tank, an observation pipe is fixed to the overflow pipe, a valve is fixed to the observation pipe, and a slider is provided inside the observation pipe.

2. The vacuum pump airtightness testing device according to claim 1, characterized in that, A sealing ring is also fixed on the cover plate.

3. The vacuum pump airtightness testing device according to claim 1, characterized in that, Multiple positioning rods are fixed on the top plate, and positioning shafts are fixed on the cover plate at positions corresponding to the positioning rods. Positioning tubes are provided on the positioning shafts, and cylinders that are rotatably connected to the positioning rods are provided on the positioning rods. The piston rod ends of the cylinders are fixed to the corresponding positioning tubes.

4. The vacuum pump airtightness testing device according to claim 1, characterized in that, The observation tube is made of glass.

5. The vacuum pump airtightness testing device according to claim 1, characterized in that, A water inlet pipe is also fixed on the water tank.

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