Sealing structure for vacuum pump

Abstract

The utility model discloses a sealing structure for a vacuum pump, and relates to the technical field of sealing structures. The sealing structure for the vacuum pump comprises a vacuum pump body and an oil tank arranged on the outer surface of the vacuum pump body, an oil injection pipe is arranged on the upper surface of the oil tank, the top end of the oil injection pipe is in threaded connection with a sealing cover, and threads are arranged on the inner ring face of the sealing cover. A thread groove in threaded connection with the thread is formed in the outer surface of the top end of the oil filling pipe; the first sealing assembly is used for sealing a gap between the sealing cover and the oil filling pipe after the sealing cover is in threaded connection with the oil filling pipe; and the second sealing assembly is used for plugging the inner wall of the oil filling pipe after the sealing cover is in threaded connection with the oil filling pipe. By arranging the first sealing assembly and the second sealing assembly, effective sealing of the inner wall of the oil filling pipe can be achieved, and then the sealing effect after the sealing cover and the oil filling pipe are connected is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, specifically a sealing structure for a vacuum pump. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and create a vacuum. In simpler terms, a vacuum pump is a device that uses various methods to improve, generate, and maintain a vacuum in a closed space.

[0003] In the sealing process, the oil filling port of the existing vacuum pump oil tank is usually sealed with a simple threaded cap. This threaded sealing method with a simple cap has a relatively simple sealing performance in actual sealing. As a result, the sealing performance of the cap is easily damaged after frequent disassembly over a long period of time. That is, the existing technology has the defect of poor sealing performance of the cap.

[0004] In view of this, this application proposes a sealing structure for a vacuum pump. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a sealing structure for vacuum pumps, which solves the problem of poor sealing performance in existing technologies.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for a vacuum pump, comprising:

[0007] The vacuum pump body and the oil tank disposed on the outer surface of the vacuum pump body are provided with an oil injection pipe on the upper surface of the oil tank, and a sealing cap is threaded to the top end of the oil injection pipe. The inner ring surface of the sealing cap is provided with threads, and a threaded groove is opened on the outer surface of the top end of the oil injection pipe for threaded connection with the threads.

[0008] The first sealing assembly is used to seal the gap between the sealing cap and the oil injection pipe after the sealing cap and the oil injection pipe are threaded together. The first sealing assembly includes a rubber sealing ring disposed on the inner top wall of the sealing cap, and the rubber sealing ring abuts against the top end of the oil injection pipe.

[0009] The second sealing assembly is used to seal the inner wall of the oil injection pipe after the sealing cap is threadedly connected to the oil injection pipe. The second sealing assembly includes a connecting post fixed to the inner top wall of the sealing cap and an annular groove formed on the outer surface of the connecting post. An inflatable airbag ring is fixed to the inner wall of the annular groove. The second sealing assembly also includes an annular cavity formed at the bottom end of the sealing cap and a telescopic tube slidably disposed on the inner wall of the annular cavity. Two symmetrical arc-shaped airbags are fixed to the inner top wall of the annular cavity, and the bottom ends of the two arc-shaped airbags are fixedly connected to the top end of the telescopic tube. An inflation tube is provided on the surface of the arc-shaped airbags, which penetrates the interior of the sealing cap and the connecting post and extends into the interior of the inflatable airbag ring.

[0010] Preferably, the inner top wall of the sealing cover is provided with an annular groove, and the rubber sealing ring is slidably connected to the inner wall of the annular groove.

[0011] Preferably, the inner top wall of the annular groove is provided with a plurality of first springs in a circumferential array, and the bottom end of the first spring is fixedly connected to the top end of the rubber sealing ring.

[0012] Preferably, the inner top wall of the annular cavity is fixedly provided with two symmetrical second springs, and the bottom ends of the two second springs are fixedly connected to the top end of the telescopic tube.

[0013] Preferably, the bottom end of the telescopic tube is provided with a plurality of spherical grooves in a circumferential array, and the inner wall of each of the plurality of spherical grooves is provided with a metal ball for rotation.

[0014] Preferably, a connecting ring is fixed on the outer surface of the oil injection pipe, and a plurality of metal balls are rolledly connected to the upper surface of the connecting ring.

[0015] Preferably, the inner top wall and inner bottom wall of the arc-shaped airbag are fixed with a plurality of third springs at equal intervals to facilitate the repositioning of the arc-shaped airbag.

[0016] Beneficial effects

[0017] This invention provides a sealing structure for a vacuum pump. Compared with the prior art, it has the following advantages:

[0018] The vacuum pump uses a sealing structure. By setting a first sealing component, when sealing the oil tank of the vacuum pump body, the rubber sealing ring can be pressed against the top of the oil injection pipe, achieving an effective seal at the connection between the oil injection pipe and the sealing cover. By setting a second sealing component, when the sealing cover moves downward, the inflation airbag ring can be expanded and pressed against the inner bottom wall of the oil injection pipe, achieving an effective seal on the inner wall of the oil injection pipe, thereby effectively improving the sealing effect after the sealing cover and the oil injection pipe are connected. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the sealing cap of this utility model;

[0021] Figure 3 This is a side sectional view of the sealing cap of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the telescopic tube of this utility model.

[0023] In the picture:

[0024] 100. Vacuum pump body;

[0025] 200. Fuel tank;

[0026] 300. Oil injection pipe;

[0027] 400. Sealing cap;

[0028] 500, First sealing assembly; 501, Rubber sealing ring; 502, First spring;

[0029] 600. Second sealing assembly; 601. Connecting post; 602. Inflatable airbag ring; 603. Telescopic tube; 604. Arc-shaped airbag; 605. Inflation tube; 606. Second spring; 607. Metal ball; 608. Connecting ring; 609. Third spring. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-4 This utility model provides a technical solution: a sealing structure for a vacuum pump, comprising:

[0032] The vacuum pump body 100 and the oil tank 200 are provided on the outer surface of the vacuum pump body 100. The upper surface of the oil tank 200 is provided with an oil injection pipe 300, and the top end of the oil injection pipe 300 is threadedly connected to a sealing cap 400. The inner ring surface of the sealing cap 400 is provided with threads, and the outer surface of the top end of the oil injection pipe 300 is provided with a threaded groove that is threadedly connected to the threads.

[0033] The first sealing assembly 500 is used to seal the gap between the sealing cover 400 and the oil injection pipe 300 after the sealing cover 400 and the oil injection pipe 300 are threadedly connected. The first sealing assembly 500 includes a rubber sealing ring 501 disposed on the inner top wall of the sealing cover 400, and the rubber sealing ring 501 abuts against the top end of the oil injection pipe 300.

[0034] See Figure 2 , Figure 3 The inner top wall of the sealing cover 400 is provided with an annular groove, and the rubber sealing ring 501 is slidably connected to the inner wall of the annular groove.

[0035] See Figure 2 , Figure 3 The inner top wall of the annular groove is fixedly provided with several first springs 502 in a circumferential array, and the bottom end of the first spring 502 is fixedly connected to the top end of the rubber sealing ring 501.

[0036] The first spring 502 is designed to ensure that the rubber sealing ring 501 can make a tighter contact with the top of the oil injection pipe 300, thus ensuring a good seal.

[0037] In this embodiment, by setting the first sealing component 500, when sealing the oil tank 200 of the vacuum pump body 100, the rubber sealing ring 501 can be pressed against the top end of the oil injection pipe 300, thereby achieving effective sealing at the connection between the oil injection pipe 300 and the sealing cover 400.

[0038] Example 2

[0039] Based on Example 1, and differing from Example 1 in that,

[0040] A sealing structure for a vacuum pump further includes:

[0041] The second sealing assembly 600 is used to seal the inner wall of the oil injection pipe 300 after the sealing cap 400 is threadedly connected to the oil injection pipe 300. The second sealing assembly 600 includes a connecting post 601 fixed to the inner top wall of the sealing cap 400 and an annular groove opened on the outer surface of the connecting post 601. An inflatable airbag ring 602 is fixedly provided on the inner wall of the annular groove. The second sealing assembly 600 also includes an annular cavity opened at the bottom end of the sealing cap 400 and a telescopic tube 603 slidably provided on the inner wall of the annular cavity. Two symmetrical arc-shaped airbags 604 are fixedly provided on the inner top wall of the annular cavity, and the bottom ends of the two arc-shaped airbags 604 are fixedly connected to the top end of the telescopic tube 603. An inflation tube 605 is provided on the surface of the arc-shaped airbags 604, which penetrates the interior of the sealing cap 400 and the connecting post 601 and extends into the interior of the inflatable airbag ring 602.

[0042] See Figure 2Two symmetrical second springs 606 are fixedly installed on the inner top wall of the annular cavity, and the bottom ends of the two second springs 606 are fixedly connected to the top end of the telescopic tube 603.

[0043] The second spring 606 is designed to facilitate the resetting of the telescopic tube 603 when the sealing cover 400 is removed.

[0044] See Figure 2 The bottom end of the telescopic tube 603 is provided with several spherical grooves in a circular array, and the inner wall of each of the spherical grooves is provided with a metal ball 607.

[0045] The metal ball 607 is designed to facilitate the rotation of the sealing cover 400.

[0046] See Figure 2 A connecting ring 608 is fixed on the outer surface of the oil injection pipe 300, and several metal balls 607 are rolledly connected to the upper surface of the connecting ring 608.

[0047] See Figure 3 The inner top wall and inner bottom wall of the arc-shaped airbag 604 are fixed with several third springs 609 at equal intervals to facilitate the reset of the arc-shaped airbag 604.

[0048] The third spring 609 is designed to allow the arc-shaped airbag 604 to be reset, thereby facilitating the extraction of gas from the inflated airbag ring 602.

[0049] In this embodiment, by setting the second sealing component 600, during the downward movement of the sealing cover 400, the inflatable airbag ring 602 can expand and press against the inner bottom wall of the oil injection pipe 300, thereby effectively sealing the inner wall of the oil injection pipe 300 and thus effectively improving the sealing effect after the sealing cover 400 and the oil injection pipe 300 are connected.

[0050] During operation, when sealing the oil tank 200 of the vacuum pump body 100, the sealing cover 400 can be threadedly connected to the oil injection pipe 300. During the threaded connection, the sealing cover 400 moves downward, causing the rubber sealing ring 501 to slide on the inner wall of the annular groove. Under the action of the first spring 502, the rubber sealing ring 501 can abut against the top end of the oil injection pipe 300, achieving effective sealing at the connection between the oil injection pipe 300 and the sealing cover 400. Furthermore, the sealing cover... As 400 moves downward, it can drive the telescopic tube 603 to be inserted into the annular cavity, so that the top of the telescopic tube 603 is squeezed against the two arc-shaped airbags 604. This allows the gas inside the arc-shaped airbags 604 to enter the inflation ring 602 through the inflation tube 605, causing the inflation ring 602 to expand and press against the inner bottom wall of the oil injection pipe 300, thus effectively sealing the inner wall of the oil injection pipe 300 and effectively improving the sealing effect after the sealing cap 400 is connected to the oil injection pipe 300.

[0051] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A seal structure for a vacuum pump, characterized by, The utility model relates to a kind of oil injection pipe and sealing cover of vacuum pump, including: Vacuum pump body (100), and oil tank (200) is arranged on the outer surface of vacuum pump body (100), the upper surface of the oil tank (200) is provided with oil injection pipe (300), and the top end of the oil injection pipe (300) is threadedly connected with sealing cover (400), the inner ring surface of the sealing cover (400) is provided with thread, and the top end outer surface of oil injection pipe (300) is provided with thread groove with thread thread connection; First sealing assembly (500) is used to seal the gap between sealing cover (400) and oil injection pipe (300) after threadedly connected, the first sealing assembly (500) includes rubber sealing ring (501) arranged on the inner top wall of sealing cover (400), and rubber sealing ring (501) is tightly connected with the top end of oil injection pipe (300); Second sealing assembly (600) is used to block the inner wall of oil injection pipe (300) after threadedly connected between sealing cover (400) and oil injection pipe (300), the second sealing assembly (600) includes connecting column (601) fixedly arranged on the inner top wall of sealing cover (400), and annular groove is arranged on the outer surface of connecting column (601), the inner wall of the annular groove is fixedly provided with inflatable air bag ring (602), the second sealing assembly (600) further includes annular cavity arranged at the bottom end of sealing cover (400), and telescopic pipe (603) is slidably arranged on the inner wall of annular cavity, the inner top wall of the annular cavity is fixedly provided with two symmetrical arc-shaped air bags (604), and the bottom end of the two arc-shaped air bags (604) is fixedly connected with the top end of telescopic pipe (603), the surface of the arc-shaped air bag (604) is provided with inflation tube (605) penetrating the inside of connecting column (601) and sealing cover (400) and extending to the inside of inflatable air bag ring (602).

2. A seal structure for a vacuum pump according to claim 1, characterized in that: The inner top wall of the sealing cover (400) is provided with an annular sliding groove, and the rubber sealing ring (501) is slidably connected with the inner wall of the annular sliding groove.

3. A seal structure for a vacuum pump according to claim 2, characterized in that: The inner top wall of the annular sliding groove is fixedly provided with a plurality of first springs (502) in a circumferential array, and the bottom end of the first spring (502) is fixedly connected with the top end of the rubber sealing ring (501).

4. The seal structure for a vacuum pump according to claim 1, characterized by: The inner top wall of the annular cavity is fixedly provided with two symmetrical second springs (606), and the bottom end of the two second springs (606) is fixedly connected with the top end of the telescopic pipe (603).

5. The seal structure for a vacuum pump according to claim 1, characterized by: The bottom end of the telescopic pipe (603) is provided with a plurality of spherical grooves in a circumferential array, and the inner wall of each of the plurality of spherical grooves is rotatably provided with a metal rolling ball (607).

6. A seal arrangement for a vacuum pump according to claim 5, wherein: The outer surface of the oil injection pipe (300) is fixedly provided with a connecting ring (608), and each of the plurality of metal rolling balls (607) is rollingly connected with the upper surface of the connecting ring (608).

7. The seal structure for a vacuum pump according to claim 1, characterized by: The inner top wall and the inner bottom wall of the arc-shaped air bag (604) are equidistantly fixedly provided with a plurality of third springs (609) for facilitating the resetting of the arc-shaped air bag (604).

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