Vacuum pump air tightness detection method

Abstract

The invention discloses a vacuum pump air tightness detection device, the vacuum pump air tightness detection device comprises a main body unit, a power unit and a detection assembly, and a specific method for detecting the air tightness of a vacuum pump by using the vacuum pump air tightness detection device comprises the following steps: placing the vacuum pump between two zigzag clamping plates; the two-way screw drives the zigzag clamping plate to clamp the vacuum pump, and the closing plate is closed when the soap liquid dropping bottle returns; then, a connecting hose is inserted into the input end of a vacuum pump, the output end of the vacuum pump is sealed, an air pump is connected with the other end of the connecting hose, and air is continuously inflated into the vacuum pump; the reciprocating moving assembly is driven by the driving assembly to operate, meanwhile, the vacuum pump is driven by the rotating assembly to intermittently rotate by 90 degrees, and liquid soap flows downwards to the outer wall of the vacuum pump by opening the closing plate; and whether soap bubbles are generated on the four outer walls of the vacuum pump is observed in sequence, and if the soap bubbles are generated, cracks and other gaps exist.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pumps, and in particular to a method for detecting air tightness of a vacuum pump. Background Art

[0002] A vacuum pump refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. It usually includes a pump body and a motor that drives the impeller to rotate. The interior of the vacuum pump needs to maintain a high level of airtightness. When the airtightness is low, the vacuum effect of the vacuum pump cannot be achieved. Therefore, after the pump body is manufactured, the pump body needs to be tested for airtightness to prevent cracks and other gaps in the pump body from affecting the airtightness.

[0003] Existing methods for detecting the air tightness of vacuum pumps mainly include pressure change method, bubble method, vacuum method and thermal expansion method. The bubble method detects the air tightness of the vacuum pump by filling the vacuum pump with compressed gas and then placing the vacuum pump in water or applying soap solution on the surface, and detecting the air tightness of the vacuum pump by the presence or absence of bubbles. Therefore, it is suitable for small and micro vacuum pumps. Since the motor output shaft and the pump body of the vacuum pump are movably connected, there is usually a certain gap, which makes it easy for water or soap solution to flow into the motor and cause damage to the motor. In addition, the operation under the existing technology is not easy to evenly apply the soap solution on the outer wall of the pump body, which makes it easy for undetected parts to be missed, resulting in inaccurate test results and waste of soap solution. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned existing method for detecting air tightness of a vacuum pump, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a method for detecting the air tightness of a vacuum pump, which is to solve the problem that "since the motor output shaft and the pump body of the vacuum pump are movably connected, there is usually a certain gap, which makes it easy for water or soap liquid to flow into the motor and cause damage to the motor. In addition, the operation under the existing technology is not easy to make the soap liquid evenly spread on the outer wall of the pump body, so it is easy to miss the undetected part, resulting in inaccurate detection results and waste of soap liquid."

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a vacuum pump airtightness detection method, which uses a vacuum pump airtightness detection device, the vacuum pump airtightness detection device includes a main unit, a power unit and a detection component, and the specific method of using the vacuum pump airtightness detection device to detect the airtightness of the vacuum pump is as follows:

[0008] S1: Place the vacuum pump between two folding clamps, drive the folding clamps to clamp the vacuum pump through the bidirectional screw, and make the absorbent sponge close to the outer wall of the vacuum pump;

[0009] S2: Insert the connecting hose into the input end of the vacuum pump and seal the output end of the vacuum pump, connect the air pump to the other end of the connecting hose and continuously fill the vacuum pump with air;

[0010] S3: Add soap liquid into the soap liquid drop bottle, drive the reciprocating moving component to operate through the driving component, and drive the vacuum pump to rotate intermittently by 90 degrees through the rotating component, open the closing plate to let the soap liquid flow downward to the outer wall of the vacuum pump, and close the closing plate when the soap liquid drop bottle returns;

[0011] S4: Observe the four outer walls of the vacuum pump in turn to see if there are bubbles. If there are bubbles, there must be cracks or other gaps there.

[0012] The main unit includes a base, the bottom surface of the base is set as a bevel, and the height of the left side of the top of the base is greater than the height of the right side of the top, and the top of the base is fixedly connected to two annular tracks, the inside of the left annular track is provided with a waterproof component, and the inside of the right annular track is provided with a clamping component for clamping a vacuum pump;

[0013] The power unit includes a driving assembly and a rotating assembly, wherein the driving assembly drives the rotating assembly to rotate, and the rotating assembly drives the clamping assembly to rotate;

[0014] The detection unit comprises a soap dropper bottle and a reciprocating assembly. The reciprocating assembly is driven by a driving assembly to run and drive the soap dropper bottle to move. A sealing assembly is arranged below the bottle mouth of the soap dropper bottle.

[0015] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, the waterproof component includes two axially symmetrical U-shaped plates, and the inner side of the U-shaped plate is fixedly connected with a water-absorbing sponge, and the internal dimensions of the two water-absorbing sponges when closed are the same as the outer wall dimensions of the clicking part of the vacuum pump.

[0016] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, a connecting hose is provided on the side of the U-shaped plate below, the input end of the connecting hose is fixedly connected to the U-shaped plate, and the output end of the connecting hose is active.

[0017] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, the clamping assembly includes two folding clamps, and the two folding clamps are respectively fixedly connected to the two U-shaped plates, and a baffle is fixedly connected to the right side of the folding clamp.

[0018] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, wherein: the outer side of the folding splint is fixedly connected with a movable frame, the outer wall of the movable frame is provided with two through holes, the inner wall of the through hole is movably connected with a U-shaped rod, both ends of the U-shaped rod are fixedly connected with an arc-shaped slider, the arc-shaped slider is movably connected inside the annular track, and the outer side of the U-shaped plate is provided with a structure identical to the above content.

[0019] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, the rotating assembly includes a groove wheel, a connecting frame is fixedly connected to the axis of the groove wheel, the connecting frame is fixedly connected to the U-shaped rod, and a bidirectional screw is rotatably connected in the middle of the connecting frame. The outer wall of the bidirectional screw is threadedly connected to two nuts, and the two nuts are fixedly connected to the two movable frames respectively.

[0020] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, the driving assembly includes a rotating rod, a rotating shaft is fixedly connected to the axis of the rotating rod, a slider is fixedly connected to the outer end of the rotating rod, and the slider is matched with the groove wheel.

[0021] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, wherein: the reciprocating moving component includes a special-shaped gear, the special-shaped gear is fixedly connected to the rotating shaft, a movable frame is arranged on the outer side of the special-shaped gear, and tooth grooves meshing with the special-shaped gear are provided on the upper and lower sides of the movable frame, a connecting slider is fixedly connected to the top of the movable frame, a linear slide groove movably connected to the connecting slider is provided on the outer wall of the annular track on the left side, and the movable frame is fixedly connected to the soap dropper bottle.

[0022] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, the closing component includes a closing plate, the bottom of the closing plate is fixedly connected to a rotating rod, the middle of the rotating rod is rotatably connected to a fixing nail, and the fixing nail is fixedly connected to the soap dropper bottle through a connecting block.

[0023] As a preferred solution of the vacuum pump air tightness detection method described in the present invention, the front and rear sides of the left side of the circular track are respectively fixedly connected with limit rod 2 and limit rod 1, and the opposite surfaces of limit rod 1 and limit rod 2 are both beveled edges.

[0024] Beneficial effects of the present invention:

[0025] 1. The present invention drives the clamping assembly and the vacuum pump to rotate through the driving assembly and the rotating assembly, and the soap liquid is evenly dripped by the linear movement of the soap liquid dropper bottle, so that each surface of the vacuum pump is evenly exposed to the soap liquid, thereby preventing undetected omissions from causing inaccurate results of the air tightness test of the vacuum pump, and absorbing excess soap liquid through the absorbent sponge, thereby preventing the soap liquid from flowing into the interior of the motor and causing damage to the motor.

[0026] 2. The present invention synchronizes the rotation of the vacuum pump with the movement of the soap dropper bottle through the groove wheel, the special-shaped gear and the movable frame, thereby simplifying the operation difficulty. At the same time, the closing plate is rotated by the limit rods 1 and 2 pushing the rotating rod. When the soap dropper bottle returns, the closing plate is closed to prevent the soap from dripping, thereby preventing the soap from being wasted. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 A front structural schematic diagram of a vacuum pump air tightness detection method proposed by the present invention;

[0029] Figure 2 A schematic diagram of the waterproof component structure of a vacuum pump air tightness detection method proposed by the present invention;

[0030] Figure 3 A schematic diagram of the structure of a driving component of a vacuum pump air tightness detection method proposed by the present invention;

[0031] Figure 4 A schematic diagram of the structure of a clamping assembly of a vacuum pump air tightness detection method proposed by the present invention;

[0032] Figure 5 A schematic diagram of the structure of a reciprocating moving component of a vacuum pump air tightness detection method proposed by the present invention;

[0033] Figure 6 This is a structural schematic diagram of a closed plate open state of a vacuum pump air tightness detection method proposed by the present invention.

[0034] In the figure: 100, main unit; 101, base; 102, circular track; 102a, limit rod 1; 102b, limit rod 2; 103, waterproof component; 103a, U-shaped plate; 103b, water-absorbing sponge; 103c, connecting hose; 104, clamping component; 104a, folding clamp; 104b, baffle; 104c, arc-shaped slider; 104d, U-shaped rod; 104e, movable frame; 200, power unit; 201, driving component; 2 01a, rotating rod; 201b, rotating shaft; 201c, slider; 202, rotating assembly; 202a, groove wheel; 202b, connecting frame; 202c, bidirectional screw; 202d, nut; 300, detection unit; 301, soap dropper bottle; 302, closing assembly; 302a, closing plate; 302b, rotating rod; 302c, fixing nail; 303, reciprocating moving assembly; 303a, special-shaped gear; 303b, movable frame; 303c, connecting slider. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0039] Reference Figure 1-6 The present invention provides a vacuum pump airtightness detection method, which uses a vacuum pump airtightness detection device, the vacuum pump airtightness detection device includes a main unit 100, a power unit 200 and a detection component 300. The specific method of using the vacuum pump airtightness detection device to detect the airtightness of the vacuum pump is as follows:

[0040] S1: Place the vacuum pump between the two folding clamps 104a, drive the folding clamps 104a to clamp the vacuum pump through the bidirectional screw 202c, and make the water-absorbing sponge 103b close to the outer wall of the vacuum pump;

[0041] S2: insert the connecting hose 105 into the input end of the vacuum pump and seal the output end of the vacuum pump, connect the air pump to the other end of the connecting hose 105 and continuously fill the vacuum pump with air;

[0042] S3: Add soap liquid into the soap liquid drop bottle 301, drive the reciprocating moving component 303 to operate through the driving component 201, and drive the vacuum pump to rotate intermittently by 90 degrees through the rotating component 202, open the closing plate 302a to let the soap liquid flow downward to the outer wall of the vacuum pump, and close the closing plate 302a when the soap liquid drop bottle 301 returns;

[0043] S4: Observe the four outer walls of the vacuum pump in turn to see if there are bubbles. If there are bubbles, there must be cracks or other gaps there.

[0044] The main unit 100 includes a base 101, the bottom surface of the base 101 is set as a bevel, and the height of the left side of the top of the base 101 is greater than the height of the right side of the top, so that the top structure of the base 101 is tilted to the right, so that the soap liquid flows to the right after dripping, and two annular tracks 102 are fixedly connected to the top of the base 101, and a waterproof component 103 is arranged inside the left annular track 102, and a clamping component 104 for clamping a vacuum pump is arranged inside the right annular track 102;

[0045] The power unit 200 includes a driving assembly 201 and a rotating assembly 202. The driving assembly 201 drives the rotating assembly 202 to rotate, and the rotating assembly 202 drives the clamping assembly 104 to rotate.

[0046] The detection unit 300 includes a soap dropper bottle 301 and a reciprocating assembly 303 . The reciprocating assembly 303 is driven by the driving assembly 201 to move the soap dropper bottle 301 . A sealing assembly 302 is provided below the mouth of the soap dropper bottle 301 .

[0047] Among them, the waterproof component 103 includes two axially symmetrical U-shaped plates 103a, and a water-absorbing sponge 103b is fixedly connected to the inner side of the U-shaped plate 103a. The internal dimensions of the two water-absorbing sponges 103b when closed are the same as the outer wall dimensions of the vacuum pump motor part. A connecting hose 103c is arranged on the side of the lower U-shaped plate 103a, and the input end of the connecting hose 103c is fixedly connected to the U-shaped plate 103a, and the output end of the connecting hose 103c is in an active state. The water-absorbing sponge 103b is tightly attached to the outer wall of the vacuum pump to absorb the soap liquid to prevent the soap liquid from directly penetrating into the motor, and the output end of the connecting hose 103c is connected to the input end of the vacuum pump, and the external air pump or air pump and other air delivery equipment are connected to the input end of the connecting hose 103c, so as to fill the vacuum pump with air.

[0048] Furthermore, the clamping assembly 104 includes two folding clamping plates 104a, and the two folding clamping plates 104a are fixedly connected to the two U-shaped plates 103a respectively, the right side of the folding clamping plate 104a is fixedly connected with a baffle 104b, the outer side of the folding clamping plate 104a is fixedly connected with a movable frame 104e, the outer wall of the movable frame 104e is provided with two through holes, the inner wall of the through hole is movably connected with a U-shaped rod 104d, both ends of the U-shaped rod 104d are fixedly connected with an arc-shaped slider 104c, the arc-shaped slider 104c is movably connected to the inside of the annular track 102, the outer side of the U-shaped plate 103a is provided with a structure similar to the above content, the rotating assembly 202 includes a groove wheel 202a, the axis of the groove wheel 202a is fixedly connected with a connecting frame 202b, and the connecting frame 202b is connected to the U The U-shaped rod 104d is fixedly connected, and the middle of the connecting frame 202b is rotatably connected with a bidirectional screw rod 202c. The outer wall of the bidirectional screw rod 202c is threadedly connected with two nuts 202d. The two nuts 202d are respectively fixedly connected with the two movable frames 104e. The bidirectional screw rod 202c drives the two movable frames 104e to move in opposite directions along the U-shaped rod 104d through the nuts 202d, and drives the two folding clamps 104a to clamp the outer wall of the vacuum pump motor part. The inner side of the folding clamp 104a is fixedly connected with a rubber pad for increasing friction to prevent the vacuum pump from slipping. The groove wheel 202a drives the connecting frame 202b to rotate, and the connecting frame 202b drives the U-shaped rod 104d to rotate along the inside of the annular track 102 through the arc-shaped slider 104c, thereby driving the vacuum pump to rotate.

[0049] Furthermore, the driving assembly 201 includes a rotating rod 201a, the axis of the rotating rod 201a is fixedly connected to the rotating shaft 201b, the outer end of the rotating rod 201a is fixedly connected to the slider 201c, the slider 201c is matched with the groove wheel 202a, and the reciprocating moving assembly 303 includes a special-shaped gear 303a, the special-shaped gear 303a is fixedly connected to the rotating shaft 201b, a movable frame 303b is arranged on the outer side of the special-shaped gear 303a, and the upper and lower sides of the movable frame 303b are provided with tooth grooves meshing with the special-shaped gear 303a, and the top of the movable frame 303b is fixedly connected to the connecting slide The outer wall of the left circular track 102 is provided with a linear slide groove movably connected to the connecting slider 303c, the movable frame 303b is fixedly connected to the soap dropper bottle 301, and the closing component 302 includes a closing plate 302a, the bottom of the closing plate 302a is fixedly connected to a rotating rod 302b, the middle of the rotating rod 302b is rotatably connected to a fixing nail 302c, and the fixing nail 302c is fixedly connected to the soap dropper bottle 301 through the connecting block, and the front and rear sides of the left circular track 102 are respectively fixedly connected to the limiting rod 2 102b and the limiting rod 1 102a, and the limiting rod 1 102a and the limiting rod 1 The opposite surfaces of the second positioning rod 102b are all beveled edges. There are four grooves on the outer side of the groove wheel 202a and they are distributed in a circular array. The rotating rod 201a drives the rotating shaft 201b to rotate, and the groove wheel 202a is driven to rotate intermittently by 90 degrees through the slider 201c. At the same time, the rotating shaft 201b drives the special-shaped gear 303a to rotate continuously. The outer edge of the special-shaped gear 303a is provided with a tooth groove in a bad arc shape. Therefore, when the special-shaped gear 303a rotates half a circle, the movable frame 303b is moved to the edge. At the same time, the limiting rod 102a pushes the rotating rod 302b to rotate around the fixing nail 302c and pushes the closing plate 302a. The movable frame 303b is driven to return through the tooth groove on the other side, and the closing plate 302a is opened through the limit rod 102b, thereby driving the soap liquid dripping bottle 301 to move back and forth. After the special-shaped gear 303a rotates a full circle, the rotating rod 201a drives the groove wheel 202a to rotate through the slider 201c, so that the movement of the soap liquid dripping bottle 301 is synchronized with the rotation of the vacuum pump and the soap liquid is evenly dripped onto the top of the vacuum pump body. The soap liquid stops dripping when returning, thereby preventing the soap liquid from being wasted.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for detecting air tightness of a vacuum pump, using a device for detecting air tightness of a vacuum pump, the device comprising a main unit (100), a power unit (200) and a detection component (300), characterized in that: The specific method for testing the air tightness of a vacuum pump using the above vacuum pump air tightness testing device is as follows: S1: placing the vacuum pump between two folding clamps (104a), driving the folding clamps (104a) to clamp the vacuum pump by means of a bidirectional screw (202c), and making the water-absorbing sponge (103b) close to the outer wall of the vacuum pump; S2: insert the connecting hose (105) into the input end of the vacuum pump and seal the output end of the vacuum pump, connect the air pump to the other end of the connecting hose (105) and continuously fill the vacuum pump with air; S3: adding soap liquid into the soap liquid drop bottle (301), driving the reciprocating moving component (303) to operate through the driving component (201), and driving the vacuum pump to intermittently rotate 90 degrees through the rotating component (202), opening the sealing plate (302a) to allow the soap liquid to flow downward to the outer wall of the vacuum pump, and closing the sealing plate (302a) when the soap liquid drop bottle (301) returns; S4: Observe the four outer walls of the vacuum pump in turn to see if there are bubbles. If there are bubbles, there must be cracks or other gaps there. The main unit (100) comprises a base (101), the bottom surface of the base (101) is arranged as a bevel, and the height of the left side of the top of the base (101) is greater than the height of the right side of the top, and two annular tracks (102) are fixedly connected to the top of the base (101), a waterproof component (103) is arranged inside the left annular track (102), and a clamping component (104) for clamping a vacuum pump is arranged inside the right annular track (102); The power unit (200) comprises a driving component (201) and a rotating component (202), wherein the driving component (201) drives the rotating component (202) to rotate, and the rotating component (202) drives the clamping component (104) to rotate; The detection unit (300) comprises a soap dropper bottle (301) and a reciprocating assembly (303); the reciprocating assembly (303) is driven by a driving assembly (201) to operate and drive the soap dropper bottle (301) to move; a sealing assembly (302) is provided below the bottle mouth of the soap dropper bottle (301).

2. A vacuum pump airtightness detection method according to claim 1, characterized in that: The waterproof component (103) comprises two axially symmetrical U-shaped plates (103a), the inner side of each U-shaped plate (103a) is fixedly connected with a water-absorbing sponge (103b), and the inner dimensions of the two water-absorbing sponges (103b) when closed are the same as the outer wall dimensions of the vacuum pump click part.

3. A vacuum pump airtightness detection method according to claim 2, characterized in that: A connecting hose (103c) is provided on the side of the U-shaped plate (103a) below, the input end of the connecting hose (103c) is fixedly connected to the U-shaped plate (103a), and the output end of the connecting hose (103c) is in an active state.

4. A vacuum pump airtightness detection method according to claim 3, characterized in that: The clamping assembly (104) comprises two folding clamping plates (104a), and the two folding clamping plates (104a) are respectively fixedly connected to the two U-shaped plates (103a), and a baffle (104b) is fixedly connected to the right side of the folding clamping plates (104a).

5. A vacuum pump airtightness detection method according to claim 4, characterized in that: The outer side of the folding clamp (104a) is fixedly connected to a movable frame (104e), the outer wall of the movable frame (104e) is provided with two through holes, the inner wall of the through hole is movably connected to a U-shaped rod (104d), both ends of the U-shaped rod (104d) are fixedly connected to an arc-shaped slider (104c), the arc-shaped slider (104c) is movably connected to the inside of the annular track (102), and the outer side of the U-shaped plate (103a) is provided with a structure identical to the above content.

6. A vacuum pump airtightness detection method according to claim 5, characterized in that: The rotating assembly (202) comprises a groove wheel (202a), a connecting frame (202b) is fixedly connected to the axis of the groove wheel (202a), the connecting frame (202b) is fixedly connected to the U-shaped rod (104d), a bidirectional screw rod (202c) is rotatably connected in the middle of the connecting frame (202b), and two nuts (202d) are threadedly connected to the outer wall of the bidirectional screw rod (202c), and the two nuts (202d) are respectively fixedly connected to the two movable frames (104e).

7. A vacuum pump airtightness detection method according to claim 6, characterized in that: The driving assembly (201) comprises a rotating rod (201a), the axis of which is fixedly connected to a rotating shaft (201b), the outer end of which is fixedly connected to a sliding block (201c), and the sliding block (201c) is matched with a groove wheel (202a).

8. A vacuum pump airtightness detection method according to claim 7, characterized in that: The reciprocating moving assembly (303) comprises a special-shaped gear (303a), the special-shaped gear (303a) is fixedly connected to the rotating shaft (201b), a movable frame (303b) is arranged on the outer side of the special-shaped gear (303a), and tooth grooves meshing with the special-shaped gear (303a) are provided on both the upper and lower sides of the movable frame (303b), a connecting slider (303c) is fixedly connected to the top of the movable frame (303b), and a linear sliding groove movably connected to the connecting slider (303c) is provided on the outer wall of the left side of the annular track (102), and the movable frame (303b) is fixedly connected to the soap dropper bottle (301).

9. A vacuum pump airtightness detection method according to claim 8, characterized in that: The sealing component (302) comprises a sealing plate (302a), the bottom of the sealing plate (302a) is fixedly connected to a rotating rod (302b), the middle of the rotating rod (302b) is rotatably connected to a fixing nail (302c), and the fixing nail (302c) is fixedly connected to the soap dropper bottle (301) via a connecting block.

10. A vacuum pump airtightness detection method according to claim 9, characterized in that: The front and rear sides of the left annular track (102) are respectively fixedly connected with a second limiting rod (102b) and a first limiting rod (102a), and the opposite surfaces of the first limiting rod (102a) and the second limiting rod (102b) are both beveled edges.

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