High-sealing vacuum pump

Abstract

The utility model provides a high-sealing vacuum pump, and belongs to vacuum pumps. The problem that the suck-back phenomenon occurs when an existing vacuum pump stops running is solved. The high-sealing vacuum pump comprises a pump body, a front pump cover and a rear pump cover are arranged at the front end and the rear end of the pump body respectively, a first sealing piece is arranged between the front pump cover and the front end of the pump body, a second sealing piece is arranged between the rear pump cover and the rear end of the pump body, and the front pump cover and the rear pump cover are each provided with an air inlet pipeline and an air outlet pipeline. The front pump cover is provided with an anti-suck-back device, the anti-suck-back device is composed of an installation part, a fixing part and a sealing part, the installation part is fixedly installed at the position of an air inlet pipeline of the front pump cover through bolts, the fixing part is provided with an open hole used for air circulation, the fixing part is provided with a filter screen, and a reset spring is arranged between the sealing part and the fixing part. The anti-backflow valve has the advantages of preventing backflow and being good in sealing performance.

Description

Technical Field

[0001] The utility model belongs to a vacuum pump, relates to a vacuum pump, and particularly relates to a high-sealing vacuum pump. Background Art

[0002] A vacuum pump refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum, and the vacuum pump end cover refers to the end cover of the vacuum pump.

[0003] After searching, a Chinese patent with publication number CN218467839U discloses a vacuum pump end cover for installation at the end of a pump body, comprising a pump cover body made of plastic and a reinforcing cover plate with high mechanical strength, which improves the structural strength of the reinforcing cover plate and the pump cover body after injection molding. However, the following defects still exist: it lacks a sealing structure, which may cause leakage during use.

[0004] In the actual production process, uncontrollable factors such as power outages and accidents are inevitable, causing the vacuum pump to stop running. Since the storage tank is in a vacuum state, backflow will occur when the vacuum pump stops running, causing water or oil in the pump to flow back into the storage tank, thereby contaminating the product in the tank and reducing the product qualification rate. Summary of the Invention

[0005] The purpose of the utility model is to provide a high-sealing vacuum pump which can prevent backflow and has good sealing performance in order to solve the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a high-seal vacuum pump, including a pump body, a front pump cover and a rear pump cover are respectively provided at the front and rear ends of the pump body, characterized in that a seal 1 is provided between the front pump cover and the front end of the pump body, a seal 2 is provided between the rear pump cover and the rear end of the pump body, the front pump cover, the seal 1, the pump body, the seal 2 and the rear pump cover are fixed and sealed in sequence by bolts, the front pump cover and the rear pump cover are both provided with an air intake pipe for air intake and an air outlet pipe for air outlet, the The front pump cover is provided with an anti-backflow device for preventing gas backflow and filtering gas. The anti-backflow device consists of a mounting part, a fixing part and a sealing part. The mounting part is fixed to the air intake pipe of the front pump cover by bolts. An opening for gas circulation is provided on the fixing part. A filter is provided on the fixing part relative to the opening. The sealing part is arranged in an inverted T-shaped structure. A reset spring is provided between the sealing part and the fixing part. The sealing part can slide up and down on the fixing part to close or open the opening for gas circulation.

[0007] In the above-mentioned high-seal vacuum pump, the sealing part is penetrated on the fixed part and slides on the fixed part. One end of the sealing part is arranged at the lower end of the fixed part and can seal the opening on the fixed part. The other end of the sealing part is arranged at the upper end of the fixed part, and a connecting part is provided on the end. One end of the return spring is arranged on the connecting part, and the other end of the return spring is fixedly arranged on the fixed part.

[0008] In the above-mentioned high-seal vacuum pump, an abutment ring for the fixing portion to abut against is provided on the inner wall of the air intake pipe, and the abutment ring and the air intake pipe are integrally formed.

[0009] In the above-mentioned high-sealing vacuum pump, stepped grooves are provided on the front pump cover and the rear pump cover at the connection with the pump body, and sealing rings are fixedly provided between the front pump cover and the rear pump cover and the pump body.

[0010] Compared with the existing technology, this high-sealing vacuum pump has the following advantages:

[0011] 1. An anti-backflow device is installed at the position of the air inlet pipe to prevent water or oil from flowing back into the storage tank, thereby preventing the product in the tank from being contaminated and reducing the qualified rate of the product.

[0012] 2. Seal 1 and seal 2 are provided between the pump body and the front pump cover and the rear pump cover to enhance the sealing performance of the pump body during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model.

[0015] In the figure, 1. pump body; 2. front pump cover; 3. rear pump cover; 4. seal 1; 5. seal 2; 6. anti-backflow device; 7. mounting part; 8. fixing part; 9. sealing part; 10. return spring; 11. connecting part; 12. abutment ring; 13. sealing ring. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] like Figure 1 、 Figure 2As shown, the high-sealing vacuum pump comprises a pump body 1, wherein the front and rear ends of the pump body 1 are respectively provided with a front pump cover 2 and a rear pump cover 3, a seal 1 4 is provided between the front pump cover 2 and the front end of the pump body 1, and a seal 2 5 is provided between the rear pump cover 3 and the rear end of the pump body 1, the front pump cover 2, the seal 1 4, the pump body 1, the seal 2 5 and the rear pump cover 3 are fixed and sealed in sequence by bolts, and the front pump cover 2 and the rear pump cover 3 are both provided with an air inlet pipe for water intake and an air outlet pipe for water discharge, and the front pump cover 2 is provided with an anti-backflow device 6 for preventing gas backflow and filtering gas, and the anti-backflow device 6 is provided with a filter. The suction device 6 consists of a mounting portion 7, a fixing portion 8 and a sealing portion 9. The mounting portion 7 is fixed to the air intake pipe of the front pump cover 2 by bolts. The detachable fixing arrangement of the mounting portion 7 makes it easy for the staff to disassemble the anti-backflow device 6 and perform maintenance and cleaning on the device. An opening for gas circulation is provided on the fixing portion 8, and a filter is provided on the fixing portion 8 relative to the opening. The sealing portion 9 is arranged in an inverted T-shaped structure. A reset spring 10 is provided between the sealing portion 9 and the fixing portion 8. The sealing portion 9 can slide up and down on the fixing portion 8 to close or open the opening for gas circulation.

[0018] To elaborate further, the gas enters the pump body 1 from the air inlet pipe, applies pressure to the sealing part 9, and compresses the return spring 10, so that the opening on the fixed part 8 is in a flow state, and the liquid and gas passing through the opening are filtered by the filter, thereby enhancing the filtering effect during the use of the pump. When the pump body 1 stops working, the return spring 10 rebounds and re-seals the opening of the fixed part 8 to prevent the liquid or gas entering the pump body 1 from being sucked back, thereby avoiding contamination of the product in the tank and reducing the qualified rate of the product.

[0019] To be more specific, the sealing portion 9 is passed through the fixed portion 8 and slides on the fixed portion 8. One end of the sealing portion 9 is arranged at the lower end of the fixed portion 8 and can seal the opening on the fixed portion 8. The other end of the sealing portion 9 is arranged at the upper end of the fixed portion 8, and a connecting portion 11 is provided on this end. One end of the return spring 10 is arranged on the connecting portion 11, and the other end of the return spring 10 is fixedly arranged on the fixed portion 8.

[0020] To be more specific, abutment ring 12 is provided on the inner wall of the air intake pipe for the fixing portion 8 to abut against, and the abutment ring 12 and the air intake pipe are integrally formed.

[0021] To be more specific, stepped grooves are provided on the front pump cover 2 and the rear pump cover 3 at the connection points with the pump body 1 , and sealing rings 13 are fixedly provided between the front pump cover 2 and the rear pump cover 3 and the pump body 1 .

[0022] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0023] Although this document frequently uses terms such as pump body 1, front pump cover 2, rear pump cover 3, seal 1 4, seal 2 5, anti-backflow device 6, mounting portion 7, fixing portion 8, sealing portion 9, return spring 10, connecting portion 11, abutment ring 12, and sealing ring 13, the use of other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A high-sealing vacuum pump, comprising a pump body (1), wherein the front and rear ends of the pump body (1) are respectively provided with a front pump cover (2) and a rear pump cover (3), characterized in that: A seal 1 (4) is provided between the front pump cover (2) and the front end of the pump body (1), and a seal 2 (5) is provided between the rear pump cover (3) and the rear end of the pump body (1). The front pump cover (2), seal 1 (4), pump body (1), seal 2 (5) and rear pump cover (3) are fixed and sealed in sequence by bolts. An air intake pipe for air intake and an air outlet pipe for air outlet are provided on the front pump cover (2) and the rear pump cover (3). An anti-backflow device (6) for preventing gas backflow and filtering gas is provided on the front pump cover (2). The reverse suction device (6) consists of a mounting portion (7), a fixing portion (8) and a sealing portion (9), wherein the mounting portion (7) is fixedly mounted on the air inlet duct of the front pump cover (2) by bolts, an opening for gas circulation is provided on the fixing portion (8), a filter is provided on the fixing portion (8) and relative to the opening, the sealing portion (9) is arranged in an inverted T-shaped structure, a return spring (10) is provided between the sealing portion (9) and the fixing portion (8), and the sealing portion (9) can slide up and down on the fixing portion (8) to close or open the opening for gas circulation.

2. A high-seal vacuum pump according to claim 1, characterized in that: The sealing portion (9) is passed through the fixing portion (8) and slides on the fixing portion (8). One end of the sealing portion (9) is arranged at the lower end of the fixing portion (8) and can seal the opening on the fixing portion (8). The other end of the sealing portion (9) is arranged at the upper end of the fixing portion (8), and a connecting portion (11) is arranged on the end. One end of the return spring (10) is arranged on the connecting portion (11), and the other end of the return spring (10) is fixedly arranged on the fixing portion (8).

3. A high-seal vacuum pump according to claim 1, characterized in that: A supporting ring (12) for the fixing portion (8) to abut is provided on the inner wall of the air intake pipe, and the supporting ring (12) and the air intake pipe are integrally formed.

4. A high-seal vacuum pump according to claim 1, characterized in that: Step grooves are provided on the front pump cover (2) and the rear pump cover (3) at their connection points with the pump body (1), and sealing rings (13) are fixedly provided between the front pump cover (2) and the rear pump cover (3) and the pump body (1).

Images