Double-sided sealed vacuum pump sealing detection device and method

Abstract

This invention provides a sealing testing device and method for a double-sided sealed vacuum pump, belonging to the technical field of vacuum pump testing equipment. It includes a workbench and a test box. The test box includes a base plate and an upper box body. The base plate is set on the workbench and has a mounting platform for mounting the vacuum pump body. An air inlet pipe for connecting the vacuum pump's port is provided on the base plate. An exhaust pipe is connected to the upper box body. A water inlet pipe and a drain pipe are connected to the base plate. The upper box body is made of transparent material. A connector for sealing the upper box body is provided on the base plate. An auxiliary component for inspecting the connection points of the vacuum pump is provided on the outer wall of the upper box body. During sealing testing, the vacuum pump is installed inside the test box, and the test box is filled with water. An illumination source is used to irradiate the connection points of the vacuum pump from outside the test box, allowing for direct observation of any leaking air bubbles at the connection points. This method is applicable to various models and types of vacuum pumps, improving the efficiency of vacuum pump sealing testing.

Description

Technical Field

[0001] This invention relates to the field of vacuum pump testing equipment technology, and in particular to a sealing testing device and method for a double-sided sealed vacuum pump. Background Technology

[0002] Double-sided sealed vacuum pumps, specifically double-sided water ring vacuum pumps, are widely used in industrial production. These pumps typically consist of a pump body, impeller, water ring, baffles, and power mechanism. Their main principle is based on the centrifugal force and friction generated by the rotation of a liquid (such as water), forming a water ring on the inner wall of the pump body's internal chamber. This water ring, combined with the impeller, creates multiple chambers with varying volumes, generating negative and positive pressure zones to achieve unidirectional intake and exhaust. To ensure the quality of the manufactured vacuum pumps, their sealing performance must be tested.

[0003] Patent CN117686157A discloses an airtightness testing device for a vacuum pump assembly line. The device includes a workbench, positioned on one side of the assembly line and used to provide a testing platform; a sealed chamber, located on the workbench and used to seal and store the vacuum pump to be tested; an air guide tube, one end of which is fixedly connected to the sealed chamber; a water tank, positioned on the workbench and filled with bubble solution, with the other end of the air guide tube stably inserted into the bubble solution; and a bubble-fixing net, laid in the water tank and positioned at the surface of the bubble solution, capable of adhering to air bubbles in the bubble solution.

[0004] However, since double-sided sealed vacuum pumps require testing of the number of connection points with good sealing performance, it is necessary not only to test the sealing performance of the vacuum pump, but also to locate and identify any leaks in the vacuum pump so that workers can make targeted repairs to the leaking parts. Therefore, there is a need to provide a testing device that is suitable for testing the sealing performance of double-sided sealed vacuum pumps. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, the present invention provides a sealing detection device and method for a double-sided sealed vacuum pump.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows:

[0007] In a first aspect, a sealing test device for a double-sided sealed vacuum pump is provided, including a workbench, a test box on the workbench, the test box including a base plate and an upper box body, the base plate being set on the workbench, the base plate having an mounting platform for mounting the pump body of the vacuum pump, the bottom of the upper box body being open, the base plate having an air inlet pipe for connecting to the port of the vacuum pump, the upper box body being connected to an exhaust pipe, the base plate having a water inlet pipe and a water outlet pipe, the upper box body being made of transparent material, the base plate having a connector for sealing connection with the upper box body, and the outer wall of the upper box body having auxiliary components for inspecting the connection parts of the vacuum pump.

[0008] Furthermore, the connector includes a first bolt and a first nut. One end of the first bolt is rotatably set on the edge of the base plate. Multiple first bolts are spaced apart along the edge of the base plate. A connecting protrusion is integrally provided on the lower edge of the upper box. A connecting groove is opened on the connecting protrusion that corresponds to the first bolt and allows the first bolt to be turned in. The first nut is threadedly connected to the first bolt.

[0009] Furthermore, the auxiliary components include a first slide rail and an illumination light source. The upper housing includes a first connecting part and a second connecting part. The first connecting part is cylindrical, and the second connecting part is connected to the side wall of the first connecting part. The end face of the second connecting part away from the first connecting part is provided with an opening for connecting the base plate. The first slide rail is arranged parallel to the diameter of the first connecting part on the outer side wall of the first connecting part. A first slider is damped and slidably arranged on the first slide rail along its own length direction. The illumination light source is damped and rotatably arranged on the first slider. The illumination light source is used to illuminate the outer wall of the vacuum pump.

[0010] Furthermore, a second slide rail is provided on the outer wall of the first connecting part, and the first slide rail is axially damped and slidably disposed on the second slide rail along the first connecting part.

[0011] Furthermore, a defoaming assembly is installed on the workbench. The defoaming assembly includes a vibration motor and multiple elastic connecting seats. The base plate is connected to the workbench through multiple elastic connecting seats, and the vibration motor is installed on the base plate.

[0012] Furthermore, a third connecting part is provided on the side of the first connecting part away from the second connecting part, and a bubble collecting component is provided in the third connecting part for collecting bubbles. The bubble collecting component forms a number of bubble collecting grids of uniform size facing the second connecting part.

[0013] Furthermore, the bubble collecting assembly includes several bubble collecting tubes arranged in an array. One end of each bubble collecting tube is open towards the second connecting part. Adjacent bubble collecting tubes are sealed to each other and between the bubble collecting tubes and the third connecting part. The walls of the bubble collecting tubes are transparent and have scale lines on them.

[0014] Furthermore, an exhaust port is provided at the end of the bubble collecting tube away from the opening, and a sealing plate is slidably provided on the third connecting part along the axial direction of the exhaust port. A sealing head corresponding to each bubble collecting tube is provided on the side of the sealing plate facing the bubble collecting tube.

[0015] Furthermore, a guide ridge is provided on the third connecting part along the axial direction of the exhaust port, the sealing plate is slidably connected to the guide ridge, the sealing plate is hollowed out, a support plate is provided at the end of the third connecting part away from the second connecting part, a first adjusting screw is threadedly connected to the support plate, the first adjusting screw is rotatably connected to the sealing plate, a number of second adjusting screws are threadedly connected to the sealing plate, and the sealing head is located at one end of the second adjusting screws.

[0016] Secondly, a sealing detection method for a double-sided sealed vacuum pump is also provided, employing a sealing detection device for a double-sided sealed vacuum pump as provided in the first aspect, comprising:

[0017] S01. Empty the double-sided sealed vacuum pump, clean the impurities on the surface of the double-sided sealed vacuum pump, perform waterproofing work on the electrical components and circuit connections of the double-sided sealed vacuum pump, and use plugs to seal the extra ports of the double-sided sealed vacuum pump, leaving only one open.

[0018] S02. Install and fix the double-sided sealed vacuum pump on the mounting platform, connect the air inlet pipe to the double-sided sealed vacuum pump, and install the housing.

[0019] S03. Pour clean water into the test box, cover the vacuum pump and fill the test box completely. Shake the water in the test box to remove air from the water and air bubbles attached to the surface of the double-sided sealed vacuum pump. Confirm that the test box is filled with water again.

[0020] S04. Open the air inlet pipe to fill the double-sided sealed vacuum pump with air and maintain constant pressure. Make the irradiation light source tangentially irradiate the connection part of the double-sided sealed vacuum pump, observe the distribution of bubbles on the surface of the double-sided sealed vacuum pump, and determine the leakage point of the double-sided sealed vacuum pump.

[0021] S05. Stop filling the double-sided sealed vacuum pump with gas, shake to eliminate air bubbles on the surface of the vacuum pump, and observe the amount of gas leakage at the connection between the two ends of the double-sided sealed vacuum pump through the bubble collection tube.

[0022] S06. Drain the water from the test box; test complete.

[0023] The beneficial effects of this invention are as follows: When performing a sealing test on a double-sided sealed vacuum pump, the pump body is fixedly installed on the mounting platform, the air inlet pipe is connected to the vacuum pump, the upper box is closed, water is injected into the test box until it overflows the vacuum pump, and after initial vibration to eliminate air bubbles attached to the vacuum pump and the inner wall of the test box, water is injected again to fill the test box completely, and the vacuum pump is pressurized and held for a period of time. By adjusting the position of the irradiation light source on the first track and the angle of the irradiation light source, the leakage of air bubbles at the connection part of the vacuum pump can be observed directly, thereby determining the specific location of the leak on the vacuum pump. Furthermore, through the bubble collection tube in the test box, the leakage amount of the vacuum pump within a certain time period can be obtained. This invention is applicable to various models and types of vacuum pumps, improving the efficiency of sealing test of vacuum pumps. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the sealing detection device according to Embodiment 1 of this application;

[0025] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0026] Figure 3 This is a partial cross-sectional view of the upper box of Embodiment 1 of this application;

[0027] Figure 4 This is a front view schematic diagram of the sealing detection device according to Embodiment 1 of this application;

[0028] The components include: 1. Workbench; 2. Base plate; 21. Air inlet pipe; 22. Water inlet pipe; 23. Drain pipe; 24. First bolt; 25. First nut; 3. Upper box; 31. Exhaust pipe; 32. Connecting protrusion; 33. Connecting groove; 34. First connecting part; 35. Second connecting part; 36. Third connecting part; 4. Mounting platform; 5. Auxiliary components; 51. First slide rail; 52. Irradiation light source; 53. First slider; 54. Second slide rail; 6. Defoaming assembly; 61. Vibration motor; 62. Elastic connecting seat; 7. Bubble collecting assembly; 71. Bubble collecting pipe; 72. Bubble collecting grid; 74. Exhaust port; 75. Sealing plate; 76. Sealing head; 77. First adjusting screw; 78. Second adjusting screw. Detailed Implementation

[0029] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods. Example 1

[0030] This invention provides a sealing detection device for a double-sided sealed vacuum pump, referring to... Figure 1 , Figure 2 and Figure 3The system includes a workbench 1, on which a test box is mounted. The test box is hollow and used to house a double-sided sealed vacuum pump for sealing testing. The test box consists of a base plate 2 and an upper box body 3. The base plate 2 is horizontally positioned on the workbench 1, and a mounting platform 4 is fixedly mounted on the top of the base plate 2. The edges of the mounting platform 4 protrude outwards, forming a flange for placing and connecting the vacuum pump body. The upper box body 3 is hollow inside and open at the bottom. A connector is provided on the upper box body 3 to seal it to the base plate 2.

[0031] An air inlet pipe 21 is connected to the base plate 2. One end of the air inlet pipe 21 is connected to a port flange of a vacuum pump, and the other end of the air inlet pipe 21 passes through the base plate 2 and is connected to an external testing air pump. A water inlet pipe 22 and a drain pipe 23 are also connected to the base plate 2. Both the water inlet pipe 22 and the drain pipe 23 connect to the test chamber formed by the upper body 3 above the base plate 2 to accommodate the vacuum pump. The other end of the water inlet pipe 22 is connected to a water source, such as a tap, and the other end of the drain pipe 23 is connected to a drain pipe. An installation port is provided on the workbench 1 below the base plate 2, through which the air inlet pipe 21, water inlet pipe 22, and drain pipe 23 pass to connect to the base plate 2. Valves are provided on the air inlet pipe 21, water inlet pipe 22, and drain pipe 23. The upper body 3 is made of transparent plastic. An auxiliary component 5 is also provided on the outer wall of the upper body 3 for viewing the connection points of the vacuum pump, improving the convenience of observing the vacuum pump's leakage status.

[0032] In this embodiment, the connector includes a first bolt 24 and a first nut 25. Multiple sets of connectors are spaced apart along the edge of the base plate 2. One end of the first bolt 24 is rotatably mounted on the edge of the base plate 2. A protruding edge is integrally fixed to the lower edge of the upper box body 3, with each of the first bolts 24 corresponding to one of the protruding edges, and a connecting slot 33 allowing the first bolt 24 to rotate upwards into it. When the first bolt 24 is rotated into the connecting slot 33, the first nut 25 is threadedly connected to the first bolt 24, and the first nut 25 presses downwards against the upper wall of the protruding edge, thereby fixing the upper box body 3 and the base plate 2 together. The first nut 25 can be a wing nut for easy tightening by the operator. A sealing ring is provided between the contact surfaces of the upper box body 3 and the base plate 2 to improve the sealing at the connection between the upper box body 3 and the base plate 2.

[0033] In this embodiment of the application, the upper box body 3 includes a first connecting part 34 and a second connecting part 35. The first connecting part 34 is cylindrical and the second connecting part 35 is cubic. The second connecting part 35 is connected to the side wall of the first connecting part 34. The side of the second connecting part 35 away from the first connecting part 34 is designed with an opening. When the upper box body 3 is connected to the bottom plate 2, the axis of the first connecting part 34 is horizontal.

[0034] The auxiliary component 5 includes a first slide rail 51 and an illumination light source 52. The first slide rail 51 is arc-shaped, matching the diameter of the first connecting part 34, and is fitted against the outer wall of the first connecting part 34. A first slider 53, which can be made of rubber, is slidably mounted on the first slide rail 51 along its length. The first slider 53 is damped and slidably connected to the first slide rail 51. An integral mounting part extending to one side of the first slide rail 51 is connected to the first slider 53. The illumination light source 52 is damped and hingedly mounted on the mounting part, and the hinge axis of the illumination light source 52 is parallel to the axis of the first connecting part 34. By sliding the first slider 53 and rotating the illumination light source 52, the beam of light irradiated by the illumination light source 52 can be made tangential to the vacuum pump connection part, thereby making the bubbles attached to the surface of the vacuum pump visible. By observing the number of bubbles escaping from the vacuum pump connection part, the degree of leakage of the vacuum pump can be determined, facilitating the operator to observe the leakage points of the vacuum pump.

[0035] Furthermore, a second slide rail 54 is provided on the outer wall of the first connecting part 34. The second slide rail 54 is arranged parallel to the axial direction of the first connecting part 34, and both ends of the first slide rail 51 are slidably connected to the second slide rail 54. Both ends of the first slide rail 51 are connected to a second slider, which is a rubber block, and the second slider is damped and slidably connected to the second slide rail 54.

[0036] Reference Figure 4 The workbench 1 is also equipped with a defoaming assembly 6. In this embodiment, the defoaming assembly 6 includes a vibration motor 61 and multiple elastic connecting seats 62. The elastic connecting seats 62 can be damping springs. The base plate 2 is connected to the workbench 1 through the multiple elastic connecting seats 62, and the vibration motor 61 is mounted on the base plate 2. By turning on the vibration motor 61, the test box and the internal vacuum pump can be driven to vibrate as a whole, eliminating air bubbles attached to the inner wall of the test box and the outer wall of the vacuum pump. The water inlet pipe 22, the drain pipe 23, and the air inlet pipe 21 can all be flexible pipes or metal corrugated pipes to ensure that the water inlet pipe 22, the drain pipe 23, and the air inlet pipe 21 remain intact when the base plate 2 vibrates.

[0037] In other embodiments, the defoaming component 6 can be an ultrasonic generator set on the base plate 2. The ultrasonic frequency needs to be controlled at 20KHz~30KHz to avoid causing a lot of vibration to the water in the test box, so that the bubbles can drift around when they detach from the surface of the vacuum pump.

[0038] In this embodiment, a third connecting portion 36 is provided on the side of the first connecting portion 34 away from the second connecting portion 35. A bubble-collecting assembly 7 for collecting bubbles is provided within the third connecting portion 36. The bubble-collecting assembly 7 forms several bubble-collecting grids 72 of uniform size facing the second connecting portion 35. When the vacuum pump is pressurized to sufficient pressure, pumping is stopped, and the vibration motor 61 is turned on. This vibrates the bubbles on the surface of the vacuum pump, causing them to rise and collect in the bubble-collecting grids 72, where they are collected by the bubble-collecting assembly 7. This allows the operator to observe and determine the leakage of the vacuum pump within a specified time. The independent bubble-collecting grids 72 can collect bubbles escaping from different areas on the horizontal projection of the vacuum pump. Especially for double-sided sealed vacuum pumps, which have more connecting parts, the vacuum pump can be significantly divided into different areas for directional bubble collection.

[0039] Specifically, the bubble collecting assembly 7 includes several arrayed bubble collecting tubes 71. Each bubble collecting tube 71 has an open end facing the second connecting portion 35. Adjacent bubble collecting tubes 71 are sealed to each other and to the third connecting portion 36. The walls of the bubble collecting tubes 71 are transparent and have graduation lines. The bubble collecting tubes 71 can be made of glass or plastic. The graduation lines facilitate reading the gas content collected in the bubble collecting tubes 71. Furthermore, the bottom of the bubble collecting tubes 71 can be designed as a funnel shape, wider at the top and narrower at the bottom, which concentrates the collected bubbles, allowing each bubble collecting tube 71 to collect bubbles from a larger projection area of ​​the vacuum pump.

[0040] To quickly vent the gas from the bubble collecting tube 71, in this embodiment, an exhaust port 74 is provided at the end of the bubble collecting tube 71 away from the opening. A sealing plate 75 is slidably disposed on the third connecting part 36 along the axial direction of the exhaust port 74. A sealing head 76 corresponding to each bubble collecting tube 71 is provided on the side of the sealing plate 75 facing the bubble collecting tube 71. The sealing head 76 can be a silicone column, which can be embedded into the exhaust port 74 by interference compression. When venting the air in the test box, the sealing plate 75 is moved upward to open the exhaust port 74 at the top of the bubble collecting tube 71. During the water injection process into the test box, clean water can quickly fill the entire test box. After the air in the bubble collecting tube 71 is vented, the sealing plate 75 is moved downward, so that the sealing head 76 on the sealing plate 75 can seal the exhaust port 74 on the bubble collecting tube 71. The operation is quick and convenient.

[0041] Furthermore, the inner top wall of the bubble collecting tube 71 can be designed as a spherical surface, and the exhaust port 74 can be opened at the very top of the bubble collecting tube 71, so that the bubble collecting tube 71 can be completely emptied during the exhaust process, and bubbles can be avoided from remaining in the bubble collecting tube 71.

[0042] Specifically, a guide ridge is provided on the third connecting part 36 along the axial direction of the exhaust port 74. The sealing plate 75 is slidably connected to the guide ridge and is hollowed out. A support plate is provided at the end of the third connecting part 36 away from the second connecting part 35. A first adjusting screw 77 is threadedly connected to the support plate and is rotatably connected to the sealing plate 75. Several second adjusting screws 78 are threadedly connected to the sealing plate 75, and the sealing head 76 is located at one end of the second adjusting screws 78. By rotating the first adjusting screw 77, the sealing plate 75 can be moved up and down within the third connecting part 36, thereby moving the overall sealing head 76 closer to / away from the bubble collecting tube 71. By rotating the second adjusting screws 78, the opening and closing state of the exhaust port 74 at the top of each bubble collecting tube 71 can be adjusted independently, making it suitable for more test scenarios.

[0043] Furthermore, a water collection trough can be provided around the third connecting part 36 on the outside of the upper box 3 to collect the clean water overflowing from the exhaust port 74 and exhaust pipe 31 during the test. Example 2

[0044] This application also provides a sealing detection method for a double-sided sealed vacuum pump, which uses a sealing detection device for a double-sided sealed vacuum pump provided in this application, and includes the following steps:

[0045] S01. Empty the double-sided sealed vacuum pump, clean the impurities on the surface of the double-sided sealed vacuum pump, perform waterproofing work on the electrical components and circuit connections of the double-sided sealed vacuum pump, and use plugs to seal the extra ports of the double-sided sealed vacuum pump, leaving only one open.

[0046] S02. Install and fix the double-sided sealed vacuum pump on the mounting platform 4, connect the air inlet pipe 21 to the remaining port of the double-sided sealed vacuum pump, install the upper box 3, and tighten the first nut 25 to fix the upper box 3.

[0047] S03. Move the sealing plate 75 upward to open the vent 74 on the bubble collecting tube 71, inject clean water into the test box, cover the vacuum pump and fill the test box, shake the clean water in the test box to cause the air bubbles attached to the surface of the vacuum pump to detach and float to the surface, and expel the air in the water and the air bubbles attached to the double-sided sealed vacuum pump surface. Move the sealing plate 75 downward to close the vent 74, and inject water into the test box again until water overflows from the vent 74.

[0048] S04. Open the air inlet pipe 21 to fill the double-sided sealed vacuum pump with air and maintain constant pressure. Make the irradiation light source 52 tangentially irradiate the connection part of the double-sided sealed vacuum pump, observe the distribution of bubbles on the surface of the double-sided sealed vacuum pump, and determine the leakage point of the double-sided sealed vacuum pump.

[0049] S05. Stop filling the double-sided sealed vacuum pump with gas, shake to eliminate air bubbles on the surface of the vacuum pump, and observe the amount of gas leakage at the connection between the two ends of the double-sided sealed vacuum pump through the bubble collection tube 71.

[0050] S06. Drain the water from the test box; test complete.

[0051] Those skilled in the art will understand that although preferred embodiments of the invention have been described, those skilled in the art, once they understand the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if these modifications and modifications of the invention fall within the scope of the claims of the invention and their equivalents, the invention also intends to include these modifications and modifications.

Claims

1. A sealing detection device for a double-sided sealed vacuum pump, characterized in that, The test box includes a workbench (1), a test box on the workbench (1), a base plate (2) and an upper box body (3), the base plate (2) is set on the workbench (1), the base plate (2) is provided with a mounting platform (4) for mounting the pump body of the vacuum pump, the bottom of the upper box body (3) is open, the base plate (2) is provided with an air inlet pipe (21) for connecting the port of the vacuum pump, the upper box body (3) is connected with an exhaust pipe (31), the base plate (2) is connected with a water inlet pipe (22) and a drain pipe (23), the upper box body (3) is made of transparent material, the base plate (2) is provided with a connector for sealing connection with the upper box body (3), and the outer wall of the upper box body (3) is provided with an auxiliary component (5) for viewing the connection part of the vacuum pump; The auxiliary component (5) includes an illumination light source (52) for illuminating the outer wall of the vacuum pump. The upper housing (3) includes a first connecting part (34) and a second connecting part (35). The first connecting part (34) is cylindrical, and the second connecting part (35) is connected to the side wall of the first connecting part (34). The end face of the second connecting part (35) away from the first connecting part (34) has an opening for connecting the bottom plate (2). A third connecting part (36) is provided on the side of the first connecting part (34) away from the second connecting part (35). The worktable (1) is equipped with a bubble collecting component (7) for collecting bubbles. The bubble collecting component (7) forms a plurality of bubble collecting grids (72) of uniform size facing the second connecting part (35). The bubble collecting component (7) includes a plurality of bubble collecting tubes (71) arranged in an array. The end of the bubble collecting tube (71) facing the second connecting part (35) is open. The adjacent bubble collecting tubes (71) are sealed together and between the bubble collecting tubes (71) and the third connecting part (36). The tube wall of the bubble collecting tube (71) is transparent and has scale lines on the tube wall. The worktable (1) is equipped with a defoaming component (6).

2. The sealing detection device for a double-sided sealed vacuum pump according to claim 1, characterized in that, The connector includes a first bolt (24) and a first nut (25). One end of the first bolt (24) is rotatably set on the edge of the base plate (2). Multiple first bolts (24) are spaced apart along the edge of the base plate (2). The lower edge of the upper box (3) is integrally provided with a connecting protrusion (32). The connecting protrusion (32) has a connecting slot (33) that corresponds one-to-one with the first bolt (24) and allows the first bolt (24) to be turned in. The first nut (25) is threadedly connected to the first bolt (24).

3. The sealing detection device for a double-sided sealed vacuum pump according to claim 1, characterized in that, The auxiliary component (5) further includes a first slide rail (51), which is arranged parallel to the diameter of the first connecting part (34) on the outer side wall of the first connecting part (34). A first slider (53) is provided on the first slide rail (51) along its own length direction with damping and sliding. The illumination light source (52) is provided on the first slider (53) with damping and rotation.

4. The sealing detection device for a double-sided sealed vacuum pump according to claim 3, characterized in that, A second slide rail (54) is provided on the outer wall of the first connecting part (34), and the first slide rail (51) is axially damped and slidably disposed on the second slide rail (54) along the first connecting part (34).

5. The sealing detection device for a double-sided sealed vacuum pump according to claim 3, characterized in that, The defoaming assembly (6) includes a vibration motor (61) and multiple elastic connecting seats (62). The base plate (2) is connected to the workbench (1) through multiple elastic connecting seats (62), and the vibration motor (61) is mounted on the base plate (2).

6. The sealing detection device for a double-sided sealed vacuum pump according to claim 5, characterized in that, The end of the bubble collecting tube (71) away from the opening is provided with an exhaust port (74). A sealing plate (75) is slidably provided on the third connecting part (36) along the axial direction of the exhaust port (74). A sealing head (76) corresponding to each bubble collecting tube (71) is provided on the side of the sealing plate (75) facing the bubble collecting tube (71).

7. The sealing detection device for a double-sided sealed vacuum pump according to claim 6, characterized in that, The third connecting part (36) is provided with a guide protrusion along the axial direction of the exhaust port (74). The sealing plate (75) is slidably connected to the guide protrusion. The sealing plate (75) is hollowed out. A support plate is provided at one end of the third connecting part (36) away from the second connecting part (35). A first adjusting screw (77) is threadedly connected to the support plate. The first adjusting screw (77) is rotatably connected to the sealing plate (75). A plurality of second adjusting screws (78) are threadedly connected to the sealing plate (75). The sealing head (76) is located at one end of the second adjusting screws (78).

8. A method for testing the seal of a double-sided sealed vacuum pump, comprising a seal testing device for a double-sided sealed vacuum pump as provided in any one of claims 1-7, characterized in that, include: S01. Empty the double-sided sealed vacuum pump, clean the impurities on the surface of the double-sided sealed vacuum pump, perform waterproofing work on the electrical components and circuit connections of the double-sided sealed vacuum pump, and use plugs to seal the extra ports of the double-sided sealed vacuum pump, leaving only one open. S02. Install and fix the double-sided sealed vacuum pump on the mounting platform (4), connect the double-sided sealed vacuum pump to the air inlet pipe (21), and install the box body (3). S03. Pour clean water into the test box, cover the vacuum pump and fill the test box completely. Shake the water in the test box to remove air from the water and air bubbles attached to the surface of the double-sided sealed vacuum pump. Confirm that the test box is filled with water again. S04. Open the air inlet pipe (21) to fill the double-sided sealed vacuum pump with air and maintain constant pressure, so that the irradiation light source (52) is tangentially irradiating the connection part of the double-sided sealed vacuum pump, observe the distribution of bubbles on the surface of the double-sided sealed vacuum pump, and determine the leakage part of the double-sided sealed vacuum pump. S05. Stop filling the double-sided sealed vacuum pump with gas, shake to eliminate air bubbles on the surface of the vacuum pump, and observe the amount of gas leakage at the connection between the two ends of the double-sided sealed vacuum pump through the bubble collection tube (71). S06. Drain the water from the test box; test complete.

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