Vacuum pump cavity sealing detection device

Abstract

The present invention relates to the field of vacuum pump sealing detection, specifically a vacuum pump cavity sealing detection device, including a detector bracket, a positioning support fixedly provided on the inner bottom surface of the detector bracket and a telescopic gas pipe provided on the inner top surface, electric telescopic rods provided on the inner walls on both sides of the detector bracket, jackets fixedly connected to the ends of the electric telescopic rods, the two jackets snap together to form a ring-shaped structure, and further comprising: a sealing mechanism and a measuring mechanism, the sealing mechanism being movably connected between the two jackets. This vacuum pump cavity sealing detection device is composed of a sealing mechanism and a measuring mechanism; by using a conduit, a sealing plate, a T-shaped sleeve and other components, during the process of conveying gas inside the vacuum pump for detection, when a leak occurs at the flange connection position of the vacuum pump, the measuring mechanism displays the amount of leakage on the instrument panel through a pointer rod, which facilitates comparison of the amount of leakage at both ends of the vacuum pump and facilitates subsequent differentiation and processing.

Description

Technical Field

[0001] The present invention relates to the field of vacuum pump sealing detection, in particular to a vacuum pump cavity sealing detection device. Background Art

[0002] A vacuum pump generally refers to a device that uses mechanical methods to evacuate air from a container to create a vacuum. Therefore, a vacuum pump has very high requirements for airtightness. Usually, the vacuum pump cavity needs to be tested for sealing during production and use.

[0003] The following problems exist in the existing technology and have not been well solved: 1. Since the two ends of the vacuum pump are connected by flanges, it is usually difficult to distinguish and compare the leakage amounts of the flanges at both ends during the sealing test, which makes it inconvenient to provide a basis for adjusting assembly parameters such as sealing ring selection and differentiated processing in the later stage. Summary of the Invention

[0004] The present invention aims to provide a vacuum pump cavity sealing detection device to solve the problems raised in the above-mentioned background technology: 1. Some existing vacuum pump sealing detection devices have difficulty distinguishing the amount of air leakage at the flange positions at both ends of the pump body during use. To achieve the above-mentioned purpose, the present invention provides the following technical solution: a vacuum pump cavity sealing detection device comprising:

[0005] The detector bracket has a positioning support fixedly provided on its inner bottom surface and a telescopic air pipe provided on its inner top surface. Electric telescopic rods are provided on the inner walls of both sides of the detector bracket. Jackets are fixedly connected to the ends of the electric telescopic rods. The two jackets are engaged to form a ring structure.

[0006] It also includes: a sealing mechanism and a measuring mechanism, wherein the sealing mechanism is movably connected between the two jackets and is used to seal the flange connection of the vacuum pump;

[0007] The measuring mechanism is located on the top of the left jacket and is used to detect air leakage at the flange connection.

[0008] Preferably, the sealing mechanism comprises: two U-shaped sealing pads, which are respectively slidably connected to the middle of the two jackets, with sawtooth grooves at both ends and wedge blocks on the outer rings, and L-shaped push rods that match the jackets are symmetrically fixedly connected to the surface of the U-shaped sealing pads;

[0009] A pressure plate is fixed to the surface of the jacket and cooperates with an L-shaped push rod to drive the U-shaped sealing gasket to rotate. The surface of the L-shaped push rod is fixedly connected to an L-shaped hollow guide plate;

[0010] The U-shaped extrusion block is slidably connected to the inner wall of the jacket and linked to the L-shaped hollow guide plate through a guide rod, and is used to squeeze the wedge block to tightly engage the serrated groove.

[0011] Preferably, the inner ring and both ends of the U-shaped sealing gasket are made of rubber material, the outer ring of the U-shaped sealing gasket is fixedly connected to an arc-shaped guide strip, and the side wall of the arc-shaped guide strip overlaps the inner wall of the corresponding jacket.

[0012] Preferably, waist-shaped grooves are provided at the top and bottom of the jacket, and the two L-shaped push rods are respectively slidably connected inside the two waist-shaped grooves, and a reset spring is fixedly connected between the inner wall of the waist-shaped groove and the side wall of the L-shaped push rod.

[0013] Preferably, the U-shaped extrusion block is symmetrically fixedly connected to a T-shaped positioning rod on one side away from the wedge block, and the T-shaped positioning rod is movably inserted into the surface corresponding to the sleeve, and the surface of the T-shaped positioning rod is movably sleeved with a return spring that cooperates with the sleeve.

[0014] Preferably, the measuring mechanism comprises: a conduit, the lower end of which is connected to the inside of the left U-shaped sealing gasket, the upper end of which is connected to an air reservoir, a one-way valve is provided between the bottom of the air reservoir and the conduit, and a sealing plate is slidably connected to the inside of the air reservoir;

[0015] The instrument panel is fixed on the top of the gas reservoir, with a pointer rod at the front end and an arc-shaped slot at the rear end;

[0016] One end of the toggle plate is connected to the pointer rod, and the other end slides in the arc groove and is connected to the sealing plate through a T-shaped sliding sleeve.

[0017] Preferably, a manual air release valve is fixedly connected to the middle of the conduit, an adjusting groove is provided on the top of the left jacket, and the lower part of the conduit is slidably connected to the inside of the adjusting groove.

[0018] Preferably, a waist-shaped groove is provided on the upper part of the T-shaped sliding sleeve, the length of the waist-shaped groove is set to 1.1 times the diameter of the arc groove, the end of the toggle plate is fixedly connected with a sliding pin, and one end of the sliding pin is slidably connected to the inside of the waist-shaped groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, by using the combination of components such as the conduit, the sealing plate and the T-sleeve, during the detection process of gas transport inside the vacuum pump, when a leak occurs at the flange connection position of the vacuum pump, the measuring mechanism will display the amount of leakage on the instrument panel through the pointer rod, making it convenient to compare and distinguish the leakage amounts at both ends of the vacuum pump, and providing clear directions for subsequent replacement and maintenance of the sealing ring.

[0021] In the present invention, through the coordinated use of components such as the telescopic gas pipe, the U-shaped sealing gasket and the instrument panel, after the telescopic gas pipe delivers a certain amount of gas, the residual air pressure inside the vacuum pump displayed by the position of the telescopic gas pipe and the data from the two instrument panels are statistically analyzed, so as to accurately measure whether there are air leaks at other positions of the pump body cavity in addition to the sealing of the flange connection position of the vacuum pump, thereby greatly improving the detection efficiency and reducing the cost of repeated testing.

[0022] In the present invention, through the coordinated use of components such as the U-shaped sealing gasket, the serrated groove and the wedge block, when the two U-shaped sealing gaskets are engaged with the jacket to form a ring shape and fit with the outer ring of the flange, the ends of the two U-shaped sealing gaskets are engaged through the serrated groove and squeezed by the wedge block and the U-shaped extrusion block, so that the ends of the U-shaped sealing gaskets can fit tightly together, effectively adapt to the fluctuation of the flange gap, significantly improve the sealing reliability of the connection, and reduce the risk of false detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of the detection bracket and jacket position of the present invention;

[0024] Figure 2 A three-dimensional diagram of the jacket and the instrument panel of the present invention;

[0025] Figure 3 A three-dimensional diagram of the jacket and U-shaped sealing gasket of the present invention;

[0026] Figure 4 A cross-sectional view of a local position of the L-shaped push rod and the U-shaped extrusion block of the present invention;

[0027] Figure 5 A cross-sectional view of a U-shaped sealing gasket and a local portion of a conduit according to the present invention;

[0028] Figure 6 For the present invention Figure 5 A magnified view of the structure at center A;

[0029] Figure 7 A three-dimensional diagram of a U-shaped sealing gasket and a rectangular groove of the present invention;

[0030] Figure 8 For the gas reservoir and instrument panel of the present invention;

[0031] Figure 9 It is a three-dimensional diagram of a local position of the T-shaped sliding sleeve of the present invention.

[0032] In the figure: 1. Detection bracket; 2. Positioning support; 3. Telescopic air pipe; 4. Electric telescopic rod; 5. Jacket; 6. Sealing mechanism; 601. U-shaped sealing gasket; 602. Sawtooth groove; 603. Wedge block; 604. L-shaped push rod; 605. Pressing plate; 606. L-shaped hollow guide plate; 607. U-shaped extrusion block; 608. Guide rod; 7. Measuring mechanism; 701. Conduit; 702. Air cylinder; 703. One-way valve; 704. Sealing plate; 705. Instrument panel; 706. Pointer rod; 707. Arc groove; 708. Toggle plate; 709. T-shaped sleeve. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] See also Figures 1 to 9 The present invention provides a technical solution: a vacuum pump cavity sealing detection device, comprising:

[0035] The detector bracket 1 has a positioning support 2 fixedly connected to its inner bottom surface, a telescopic air pipe 3 fixedly connected to its inner top surface, and electric telescopic rods 4 mounted on both sides of the inner wall of the detector bracket 1. It should be noted that a vacuum pump is disposed between the positioning support 2 and the telescopic air pipe 3. A three-claw clamp is provided on the top of the positioning support 2 to facilitate symmetrical clamping of the lower portion of the vacuum pump. When the clamped lower portion of the vacuum pump is in a sealed state, the top of the vacuum pump seals the clamped top of the vacuum pump through the telescopic air pipe 3 and delivers test gas to the interior for leak testing. A pressure gauge and a control valve are fixedly mounted on the surface of the telescopic air pipe 3 to facilitate monitoring of the air pressure during measurement. The coordination of the positioning support 2 and the telescopic air pipe 3 is conventional and will not be described in detail. The electric telescopic rod 4 is configured as a multi-stage telescopic rod structure, and an electric adjustment seat is fixedly connected between the end of the electric telescopic rod 4 and the inner wall of the detector bracket 1 to facilitate adjustment of the height of the electric telescopic rod 4.

[0036] Also includes:

[0037] Jacket 5 is fixedly connected to the end of the electric telescopic rod 4, and the two jackets 5 are locked together to form a ring. A sealing mechanism 6 is movably connected between the two jackets 5, and the sealing mechanism 6 is used to seal the connection point of the vacuum pump. It should be noted that since the two ends of the vacuum pump and the central cavity are connected and installed via flanges, the connection point of the pump body flange needs to be simultaneously tested during the sealing test of the vacuum pump chamber as a whole.

[0038] A measuring mechanism 7 for air leakage detection is movably mounted on the top of the left jacket 5 .

[0039] In this embodiment, Figures 1 to 9 As shown, the sealing mechanism 6 includes a U-shaped sealing gasket 601, which is slidably connected to the middle position of the jacket 5. A serrated groove 602 is provided at both ends of the U-shaped sealing gasket 601. A wedge block 603 is fixedly connected to the outer ring of the U-shaped sealing gasket 601 near the serrated groove 602. It should be noted that: since the two jackets 5 will be engaged with the two U-shaped sealing gaskets 601 in a synchronous manner in a ring shape, and the upper and lower positions of the inner ring of the U-shaped sealing gasket 601 will fit the outer ring positions of the two flanges of the vacuum pump, the middle part of the U-shaped sealing gasket 601 corresponds to the gap between the two flanges, and under the action of the serrated groove 602, the two U-shaped sealing gaskets 601 can effectively ensure the sealing effect after the ends are engaged.

[0040] The surface of the U-shaped sealing gasket 601 is symmetrically fixedly connected to an L-shaped push rod 604, which is slidably connected to the surface of the jacket 5. The surface of the jacket 5 is fixedly connected to a pressure plate 605 for driving the L-shaped push rod 604. It should be noted that the two L-shaped push rods 604 are respectively arranged at the top and bottom positions of the U-shaped sealing gasket 601. When the two U-shaped sealing gaskets 601 are annularly engaged, the pressure plate 605 on the left jacket 5 will press against the corresponding end of the L-shaped push rod 604 on the right U-shaped sealing gasket 601, and the pressure plate 605 on the right jacket 5 will press against the corresponding end of the L-shaped push rod 604 on the left U-shaped sealing gasket 601, causing the two U-shaped sealing gaskets 601 to rotate slightly between the two jackets 5.

[0041] The surface of the L-shaped push rod 604 is fixedly connected to an L-shaped hollow guide plate 606, and the inner wall of the jacket 5 is slidably connected to a U-shaped extrusion block 607 that cooperates with the L-shaped hollow guide plate 606. The U-shaped extrusion block 607 is clamped at the position of the wedge block 603 between the two U-shaped sealing gaskets 601. The surface of the U-shaped extrusion block 607 is fixedly connected to a guide rod 608, and one end of the guide rod 608 is slidably connected to the inside of the adjacent L-shaped hollow guide plate 606. It should be noted that: a groove is provided on the inner wall of the jacket 5, and the U-shaped extrusion block 607 is slidably arranged inside the groove. When the two U-shaped sealing gaskets 601 are engaged and rotated slightly, the L-shaped push rod 604 moves synchronously with the L-shaped hollow guide plate 606, so that the guide rod 608 on the U-shaped extrusion block 607 slides along the middle of the L-shaped hollow guide plate 606. When the U-shaped sealing plate 704 is about to finish rotating, the L-shaped hollow guide plate 606 will pull the guide rod 608 and the U-shaped extrusion block 607 to move, so that the U-shaped extrusion block 607 is squeezed on the surface of the wedge block 603 between the two U-shaped sealing gaskets 601. During the pressure process of the wedge block 603, the serrated grooves 602 at the ends of the two U-shaped extrusion blocks 607 are tightly engaged together, further improving the sealing between the ends of the two U-shaped sealing gaskets 601.

[0042] In this embodiment, Figures 1 to 9 As shown, the inner ring and both ends of the U-shaped sealing gasket 601 are made of rubber material. The outer ring of the U-shaped sealing gasket 601 is fixedly connected to an arc-shaped guide strip, and the side walls of the arc-shaped guide strip overlap the inner wall of the corresponding jacket 5. It should be noted that the rubber material configuration enables the inner ring of the U-shaped sealing gasket 601 to closely fit the flange surface, and also ensures a stable and tight fit when the two ends of the U-shaped sealing gaskets 601 are engaged; the arc-shaped guide strip is provided to reduce frictional resistance during the movement of the U-shaped sealing gasket 601 inside the jacket 5.

[0043] In this embodiment, Figures 1 to 9 As shown, the top and bottom of the jacket 5 are each provided with a waist-shaped groove, and two L-shaped push rods 604 are slidably connected to the inside of the two waist-shaped grooves. A return spring is fixedly connected between the inner wall of the waist-shaped groove and the side wall of the L-shaped push rod 604. It should be noted that a limit ring is fixedly sleeved on the surface of the L-shaped push rod 604, which constrains the L-shaped push rod 604 and the U-shaped sealing gasket 601 to be stably located in the middle position of the jacket 5. When the two jackets 5 are separated, the return spring will guide the L-shaped push rod 604 to return to the inside of the waist-shaped groove.

[0044] In this embodiment, Figures 1 to 9As shown, a T-shaped positioning rod is symmetrically fixedly connected to the side of the U-shaped extrusion block 607 away from the wedge block 603. The T-shaped positioning rod is movably inserted into the surface of the corresponding jacket 5. A return spring that cooperates with the jacket 5 is movably sleeved on the surface of the T-shaped positioning rod. It should be noted that when the L-shaped push rod 604 moves with the L-shaped hollow guide plate 606 to return, the guide rod 608 on the U-shaped extrusion block 607 returns and slides in the middle of the L-shaped hollow guide plate 606, and the return spring assists the U-shaped extrusion block 607 and guide rod 608 in stable return.

[0045] In this embodiment, Figures 1 to 9 As shown, the measuring mechanism 7 includes a conduit 701, which is movably arranged on the top of the left jacket 5, and the bottom of the conduit 701 is fixedly connected to the inside of the corresponding U-shaped sealing gasket 601. The top of the conduit 701 is fixedly connected to an air cylinder 702, and a one-way valve 703 is fixedly connected between the bottom of the air cylinder 702 and the bottom of the conduit 701, and a sealing plate 704 is slidably connected to the inside of the air cylinder 702. It should be noted that: the outer ring of the sealing plate 704 is fitted with the inner ring of the gas cylinder 702. When the two U-shaped sealing gaskets 601 are engaged between the two flanges, gas is transported to the inside of the vacuum pump for sealing testing. When leakage occurs between the two flanges, the gas will enter the conduit 701 and the gas cylinder 702 from the inside of the U-shaped sealing gasket 601, causing the sealing plate 704 inside the gas cylinder 702 to rise; when the telescopic gas pipe 3 stops transporting gas, under the action of the one-way valve 703, the gas inside the gas cylinder 702 will not flow back into the vacuum pump chamber, so as to avoid affecting the data observation effect; and the upper part of the conduit 701 is curved to avoid interference with the vacuum pump.

[0046] The top of the air cylinder 702 is fixedly connected to an instrument panel 705, the front end of the instrument panel 705 is rotatably connected to a pointer rod 706, the rear side of the instrument panel 705 is provided with an arc-shaped groove 707, the rear end of the pointer rod 706 is fixedly connected to a toggle plate 708, one end of the toggle plate 708 is slidably connected to the inside of the arc-shaped groove 707, the end of the toggle plate 708 is movably connected to a T-shaped sleeve 709, the bottom of the T-shaped sleeve 709 passes through the air cylinder 702 and is fixedly connected to the top of the sealing plate 704. It should be noted that when the sealing plate 704 is ascending with the T-shaped sleeve 709, the upper portion of the T-shaped sleeve 709 slides in cooperation with the end of the toggle plate 708, causing the end of the toggle plate 708 to move along the trajectory of the arc groove 707. At this time, the toggle plate 708 rotates with the pointer rod 706 in the middle of the instrument panel 705. By observing the scale of the instrument panel 705, the amount of air intake into the gas reservoir 702 can be accurately understood. Since the flange connections at both ends of the vacuum pump are provided with a sealing mechanism 6 and a measuring mechanism 7, by observing the instrument panels 705 at both ends of the vacuum pump, it is possible to accurately measure which flange position has the largest amount of air leakage, thereby facilitating subsequent processing. When a fixed amount of gas is delivered into the vacuum pump at the position of the telescopic gas supply pipe 3, by statistically analyzing the data from the barometer at the position of the telescopic gas supply pipe 3 and the instrument panel 705, it is possible to accurately measure whether there is air leakage at other locations of the pump body cavity besides the sealing of the flange connection. This statistical method is prior art and will not be described in detail here.

[0047] In this embodiment, Figures 1 to 9 As shown, a manual air release valve is fixedly connected to the middle of the conduit 701. An adjustment slot is provided at the top of the left jacket 5, and the lower portion of the conduit 701 is slidably connected within the adjustment slot. It should be noted that the manual air release valve facilitates the discharge of gas from the air reservoir 702 after use; the adjustment slot ensures that the conduit 701 at the top of the U-shaped gasket 601 does not interfere with the jacket 5 during its movement within the jacket 5.

[0048] In this embodiment, Figures 1 to 9 As shown, the upper portion of the T-shaped sleeve 709 is provided with a waist-shaped groove, the length of which is set to 1.1 times the diameter of the arcuate groove 707. A sliding pin is fixedly connected to the end of the toggle plate 708, one end of which slides within the waist-shaped groove. It should be noted that when the T-shaped sleeve 709 ascends, the toggle plate 708 moves along the trajectory of the arcuate groove 707. At this time, the toggle plate 708 also slides laterally within the waist-shaped groove, carrying the sliding pin with it, to avoid interference.

[0049] The use method and advantages of the present invention: The vacuum pump cavity sealing detection device has the following working process:

[0050] like Figures 1 to 9As shown, when in use, first install the vacuum pump between the positioning support 2 and the telescopic gas pipe 3, then start the electric telescopic rod 4 to extend, so that the two jackets 5 on the same horizontal line are annularly engaged with the flange positions on the surface of the vacuum pump. When the upper and lower flange connection positions of the vacuum pump are covered by the corresponding jackets 5, a certain amount of detection gas is transported to the inside of the vacuum pump through the telescopic gas pipe 3;

[0051] When the two jackets 5 are engaged on the same horizontal line, the pressure plate 605 on the left jacket 5 presses against the end position of the L-shaped push rod 604 on the right U-shaped sealing gasket 601, and the pressure plate 605 on the right jacket 5 presses against the end position of the L-shaped push rod 604 on the left U-shaped sealing gasket 601, so that the two U-shaped sealing gaskets 601 are fitted to the outer ring of the flange and a small rotation occurs inside the two jackets 5. During this process, the end positions of the two U-shaped sealing gaskets 601 that are fitted move with the wedge block 603 to the position of the corresponding U-shaped extrusion block 607, and the L-shaped push rod The guide rod 608 on the surface of the U-shaped extrusion block 607 slides with the L-shaped hollow guide plate 606, so that the guide rod 608 pulls the U-shaped extrusion block 607 to press between the ends of the two U-shaped sealing gaskets 601 that are about to be engaged. After the wedge block 603 at the end of the U-shaped sealing gasket 601 is pressed by the U-shaped extrusion block 607, the serrated groove 602 between the ends of the two U-shaped sealing gaskets 601 can be tightly engaged together. At the same time, the inner rings of the two annularly engaged U-shaped sealing gaskets 601 are tightly fitted against the outer ring position of the flange, completing the sealing of the flange connection;

[0052] After a short period of gas delivery, the flow stops. When there is a gas leak at the flange connection, the gas enters the conduit 701 and the gas cylinder 702 from the inside of the U-shaped sealing gasket 601, causing the sealing plate 704 inside the gas cylinder 702 to rise with the T-shaped sliding sleeve 709. The upward-moving T-shaped sliding sleeve 709 moves along the arc groove 707 on the back of the instrument panel 705 with the toggle plate 708. The toggle plate 708 rotates on the instrument panel 705 with the pointer rod 706, which can accurately measure the gas leakage at the flange connection. By observing the instrument panels 705 at the upper and lower parts of the vacuum pump, it can be determined which flange position has the largest gas leakage, thereby facilitating subsequent processing.

[0053] When the quantitative gas delivery at the telescopic gas pipe 3 position is completed, the data from the pressure gauge at the telescopic gas pipe 3 position and the two instrument panels 705 are statistically analyzed to accurately determine whether there are any leaks at other positions of the pump body chamber in addition to the sealing of the flange connection position of the vacuum pump, thereby achieving multi-directional sealing detection.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Vacuum pump cavity sealing detection device, including: A detector bracket (1) has a positioning support (2) fixedly provided on its inner bottom surface and a telescopic air delivery pipe (3) provided on its inner top surface; electric telescopic rods (4) are provided on the inner walls of both sides of the detector bracket (1); jackets (5) are fixedly connected to the ends of the electric telescopic rods (4); and two jackets (5) are engaged to form a ring structure; It is characterized in that it further comprises: a sealing mechanism (6) and a measuring mechanism (7), wherein the sealing mechanism (6) is movably connected between the two jackets (5) and is used to seal the flange connection of the vacuum pump; The measuring mechanism (7) is located on the top of the left jacket (5) and is used to detect the amount of air leakage at the flange connection; The sealing mechanism (6) comprises: two U-shaped sealing pads (601) which are respectively slidably connected to the middle of the two jackets (5), with sawtooth grooves (602) at both ends and wedge blocks (603) at the outer rings, and an L-shaped push rod (604) which matches the jacket (5) is symmetrically fixedly connected to the surface of the U-shaped sealing pad (601); A pressure plate (605) is fixed to the surface of the jacket (5) and cooperates with an L-shaped push rod (604) to drive the U-shaped sealing gasket (601) to rotate. The surface of the L-shaped push rod (604) is fixedly connected to an L-shaped hollow guide plate (606); The U-shaped extrusion block (607) is slidably connected to the inner wall of the jacket (5) and is linked to the L-shaped hollow guide plate (606) through the guide rod (608) to squeeze the wedge block (603) so that the serrated groove (602) is tightly engaged.

2. The vacuum pump cavity sealing detection device according to claim 1, characterized in that: The inner ring and both ends of the U-shaped sealing gasket (601) are made of rubber material, and the outer ring of the U-shaped sealing gasket (601) is fixedly connected to an arc-shaped guide strip, and the side wall of the arc-shaped guide strip overlaps the inner wall of the corresponding jacket (5).

3. The vacuum pump cavity sealing detection device according to claim 2, characterized in that: The top and bottom of the jacket (5) are both provided with waist-shaped grooves, and the two L-shaped push rods (604) are respectively slidably connected inside the two waist-shaped grooves, and a reset spring is fixedly connected between the inner wall of the waist-shaped groove and the side wall of the L-shaped push rod (604).

4. The vacuum pump cavity sealing detection device according to claim 3, characterized in that: A T-shaped positioning rod is symmetrically fixedly connected to one side of the U-shaped extrusion block (607) away from the wedge block (603), and the T-shaped positioning rod is movably inserted into the surface corresponding to the jacket (5). The surface of the T-shaped positioning rod is movably sleeved with a return spring that cooperates with the jacket (5).

5. The vacuum pump cavity sealing detection device according to claim 4, characterized in that: The measuring mechanism (7) comprises: a conduit (701), the lower end of which is connected to the interior of the left U-shaped sealing gasket (601), the upper end of which is connected to an air reservoir (702), a one-way valve (703) being provided between the bottom of the air reservoir (702) and the conduit (701), and a sealing plate (704) being slidably connected to the inside of the air reservoir (702); An instrument panel (705) is fixed to the top of the gas cylinder (702), and has a pointer rod (706) at its front end and an arc-shaped groove (707) at its rear end; The toggle plate (708) has one end connected to the pointer rod (706) and the other end sliding in the arc groove (707) and connected to the sealing plate (704) through a T-shaped sliding sleeve (709).

6. The vacuum pump cavity sealing detection device according to claim 5, characterized in that: A manual air release valve is fixedly connected to the middle of the conduit (701), an adjustment groove is provided on the top of the left jacket (5), and the lower part of the conduit (701) is slidably connected to the inside of the adjustment groove.

7. The vacuum pump cavity sealing detection device according to claim 6, characterized in that: A waist-shaped groove is provided on the upper portion of the T-shaped sliding sleeve (709), the length of which is set to 1.1 times the diameter of the arc-shaped groove (707), and a sliding pin is fixedly connected to the end of the toggle plate (708), one end of which is slidably connected to the inside of the waist-shaped groove.

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