Vacuum pump with two-stage sealing structure

Abstract

The utility model discloses a vacuum pump with a two-stage sealing structure, which belongs to the technical field of vacuum pumps and comprises a pump body and two pipelines of the vacuum pump, the pipelines are arranged on the pump body, fixing rings are fixedly connected onto the pipelines, fixing grooves are arranged on the fixing rings, first sealing rings are arranged in the fixing grooves, and second sealing rings are arranged in the first sealing rings. The pipeline is connected with a connecting pipe, the connecting pipe is fixedly connected with a connecting ring, the connecting ring abuts against the fixing ring, the connecting ring is fixedly connected with an inserting ring, the inserting ring is inserted into the fixing groove, the inserting ring abuts against the first sealing ring, the connecting ring is provided with a second sealing ring, and the outer side wall of the second sealing ring abuts against the inner side wall of the inserting ring. The sealing structure of the vacuum pump has the advantage that the sealing performance of connection between the vacuum pump and an object is improved.

Description

Technical Field

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

[0002] A vacuum pump is a pump that evacuates a closed space to a predetermined vacuum level, used to create, improve, and maintain a vacuum in enclosed spaces. Vacuum pumps are widely used in many industries, including food and beverage, semiconductor electronics, papermaking, medical, plastics, and woodworking.

[0003] A vacuum pump mainly consists of a pump body, a vacuuming structure, and pipes. There are two pipes on the pump body, which are the inlet and outlet pipes, respectively. When in use, the object that needs to be evacuated is connected to the vacuum pump through the pipes. The vacuuming structure is activated, and the gas in the object enters the pump body through the pipe and then exits the pump body through the other pipe. With the continuous operation of the vacuuming structure, the air in the object is evacuated to a vacuum.

[0004] Regarding the above technical conditions, there is still a drawback: the connection between the object and the vacuum pump is fixed and sealed by multiple screws, and the fixed sealing structure is relatively simple, resulting in insufficient sealing between the vacuum pump and the object.

[0005] Based on this, the present invention designs a vacuum pump with a dual-stage sealing structure to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a vacuum pump with a dual-stage sealing structure to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a vacuum pump with a dual-stage sealing structure, comprising a pump body and pipes, wherein the pipes are disposed on the pump body, and two pipes are disposed on the pump body. A fixing ring is fixedly connected to each pipe, and a fixing groove is formed on the fixing ring. A first sealing ring is disposed in the fixing groove. A connecting pipe is connected to the pipe, and a connecting ring is fixedly connected to the connecting pipe. The connecting ring abuts against the fixing ring. A plug ring is fixedly connected to the connecting ring and is inserted into the fixing groove. The plug ring abuts against the first sealing ring. A second sealing ring is disposed on the connecting ring, and the outer wall of the second sealing ring abuts against the inner wall of the plug ring. The fixing ring abuts against the second sealing ring, and the second sealing ring abuts against the connecting ring.

[0008] Preferably, both the first sealing ring and the second sealing ring have a double-ring structure.

[0009] Preferably, the fixing ring has multiple threaded holes, the connecting ring has a fixing hole, the fixing hole communicates with the threaded holes, a threaded rod is inserted into the fixing hole, the threaded rod is threaded into the threaded hole, and one end of the threaded rod abuts against the connecting ring.

[0010] Preferably, a washer is provided on the fixing ring, the washer abutting against the connecting ring, and the washer is between the insertion ring and the threaded hole.

[0011] In summary, this application has the following beneficial technical effects: During installation, the connecting pipe is installed on the pipeline, with the gasket between the connecting ring and the fixing ring, the insert ring inserted into the fixing groove, the first sealing ring between the insert ring and the fixing groove, and the second sealing ring between the connecting ring and the fixing ring. Then, the threaded rod is inserted into the fixing hole, with one end of the threaded rod threaded into the threaded hole and the other end of the threaded rod pressed against the connecting ring. At this time, the first sealing ring is clamped between the insert ring and the fixing groove, and the second sealing ring is clamped between the connecting ring and the fixing ring. Under the double-stage sealing effect of the first and second sealing rings, the connection sealing between the connecting pipe and the pipeline is better, thereby improving the connection sealing between the vacuum pump and the object. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the vacuum pump in this embodiment;

[0014] Figure 2 This is a schematic diagram of the front structure of the vacuum pump in this embodiment;

[0015] Figure 3 This is a schematic diagram of the installation structure of the vacuum pump in this embodiment;

[0016] Figure 4 This is a side view of the vacuum pump mounting structure in this embodiment.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Connecting pipe; 2. Threaded rod; 3. Connecting ring; 4. Fixing ring; 5. Pipe; 6. Pump body; 7. Second sealing ring; 8. Washer; 9. First sealing ring; 10. Threaded hole; 11. Fixing groove; 12. Insertion ring. Detailed Implementation

[0019] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0021] A vacuum pump with a dual-stage sealing structure includes a pump body 6 and pipes 5. Two pipes 5 are installed on the pump body 6, representing the inlet and outlet respectively. A retaining ring 4 is fixedly connected to each pipe 5. A retaining groove 11 is formed on the retaining ring 4, and a first sealing ring 9 is installed in the retaining groove 11.

[0022] Pipe 5 is connected to a connecting pipe 1 for connecting objects. Connecting pipe 1 is fixedly connected to a connecting ring 3, which abuts against a fixing ring 4. A plug ring 12 is fixedly connected to the connecting ring 3. The plug ring 12 is inserted into a fixing groove 11, and one end of the plug ring 12 abuts against a first sealing ring 9. At this time, under the action of the first sealing ring 9, a primary seal is achieved between the connecting pipe 1 and pipe 5.

[0023] A second sealing ring 7 is provided on the connecting ring 3, and the outer wall of the second sealing ring 7 abuts against the inner wall of the insertion ring 12. The fixing ring 4 abuts against the second sealing ring 7, and the second sealing ring 7 abuts against the connecting ring 3. Under the action of the second sealing ring 7, a secondary seal is achieved between the connecting pipe 1 and the pipe 5. Through the combined action of the primary and secondary seals, the connection between the connecting pipe 1 and the pipe 5 has good sealing performance.

[0024] Both the first sealing ring 9 and the second sealing ring 7 have a double-ring structure. With the double-ring structure, when the connecting ring 3 abuts against the fixing ring 4, the first sealing ring 9 abuts more tightly between the insertion ring 12 and the fixing groove 11, and the second sealing ring 7 abuts more tightly between the connecting ring 3 and the fixing ring 4, so that the connection between the connecting pipe 1 and the pipe 5 is better sealed.

[0025] The fixing ring 4 has multiple threaded holes 10, and the connecting ring 3 has a fixing hole that communicates with the threaded holes 10. A threaded rod 2 is inserted into the fixing hole, and the threaded rod 2 is threaded into the threaded hole 10. One end of the threaded rod 2 abuts against the connecting ring 3. With the cooperation of the threaded rod 2, the fixing hole, and the threaded hole 10, the connecting pipe 1 can be detachably connected to the pipe 5. A washer 8 is provided on the fixing ring 4, and the washer 8 abuts against the connecting ring 3. The washer 8 is located between the insertion ring 12 and the threaded hole 10, and it further enhances the sealing of the connection between the connecting pipe 1 and the pipe 5.

[0026] The implementation principle of this embodiment is as follows: During installation, the connecting pipe 1 is installed on the pipe 5, with the gasket 8 between the connecting ring 3 and the fixing ring 4, the insertion ring 12 inserted into the fixing groove 11, the first sealing ring 9 between the insertion ring 12 and the fixing groove 11, and the second sealing ring 7 between the connecting ring 3 and the fixing ring 4. Then, the threaded rod 2 is inserted into the fixing hole, with one end of the threaded rod 2 threaded into the threaded hole 10, and the other end of the threaded rod 2 pressed against the connecting ring 3. At this time, the first sealing ring 9 is clamped between the insertion ring 12 and the fixing groove 11, and the second sealing ring 7 is clamped between the connecting ring 3 and the fixing ring 4. Under the double-stage sealing effect of the first sealing ring 9 and the second sealing ring 7, the connection sealing between the connecting pipe 1 and the pipe 5 is better, thereby improving the connection sealing between the vacuum pump and the object.

[0027] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum pump with a double-stage sealing structure, comprising a pump body (6) and a pipeline (5), characterized in that: The pipe (5) is installed on the pump body (6), and there are two pipes (5) installed on the pump body (6). A fixing ring (4) is fixedly connected to the pipe (5), and a fixing groove (11) is opened on the fixing ring (4). A first sealing ring (9) is installed in the fixing groove (11). The pipe (5) is connected to a connecting pipe (1), and a connecting ring (3) is fixedly connected to the connecting pipe (1). The connecting ring (3) abuts against the fixing ring (4). A plug ring (12) is fixedly connected to the connecting ring (3). The plug ring (12) is inserted into the fixing groove (11). The plug ring (12) abuts against the first sealing ring (9). A second sealing ring (7) is provided on the connecting ring (3). The outer side wall of the second sealing ring (7) abuts against the inner side wall of the plug ring (12). The fixing ring (4) abuts against the second sealing ring (7). The second sealing ring (7) abuts against the connecting ring (3).

2. A vacuum pump with a dual-stage sealing structure according to claim 1, characterized in that: Both the first sealing ring (9) and the second sealing ring (7) are double-layered ring structures.

3. A vacuum pump with a dual-stage sealing structure according to claim 1, characterized in that: The fixing ring (4) has multiple threaded holes (10), and the connecting ring (3) has a fixing hole. The fixing hole communicates with the threaded hole (10). A threaded rod (2) is inserted into the fixing hole. The threaded rod (2) is threaded into the threaded hole (10), and one end of the threaded rod (2) abuts against the connecting ring (3).

4. A vacuum pump with a dual-stage sealing structure according to claim 3, characterized in that: A washer (8) is provided on the fixing ring (4), the washer (8) abuts against the connecting ring (3), and the washer (8) is between the insertion ring (12) and the threaded hole (10).

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