Improved vacuum pump for chemical industry
By improving the sealing connection method of vacuum pumps, using corrosion-resistant materials and stable connection structures, the problems of vacuum pumps in the chemical industry are solved, and better working performance and safety are achieved.
Patent Information
- Application Number
- CN202421787471.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The existing chemical vacuum pumps have unstable vacuum degree, decreased gas volume and leaked harmful gases during operation. This is mainly due to the fact that the tie rod connecting structure is susceptible to external forces to cause seal failure.
The sealing connection method is adopted, including a sealing ring and sealing gasket made of corrosion-resistant rubber material. The pump body and side cover are connected by bolts, flat gaskets, elastic gaskets and fastening nuts to ensure sealing and stability.
It improves the working stability of the vacuum pump, reduces noise and vibration, avoids gas leakage, ensures safety of chemical production and simple disassembly and repair of equipment.
Smart Images
Figure CN223152389U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vacuum pumps, in particular to an improved vacuum pump for chemical industry. Background Art
[0002] The chemical industry is characterized by flammability and explosiveness. Often, due to inadvertent leakage during the operation of various production equipment such as vacuum pumps, certain safety hazards are caused, and many dangerous accidents occur during the operation of the equipment. Among them, the 2BE3 series vacuum pump is an early foreign imported product of our company. The connection between the original imported vacuum pump side cover and the pump body is of a pull rod structure, which has the advantages of simple structure, easy disassembly and convenient maintenance. Therefore, under normal working conditions, users are still willing to accept this connection method.
[0003] However, this vacuum pump also has certain deficiencies. For example, some users in the chemical industry frequently report that during the operation of these vacuum pumps, the vacuum degree is unstable, the gas volume decreases, the vacuum degree is insufficient, the vibration is large, and even there is a dangerous phenomenon of harmful gas leakage during the operation of the vacuum pump. This is because during the factory production and loading and transportation of the product, especially during the hoisting process, since the pull rod is exposed outside the vacuum pump, it is easily affected by external forces. During hoisting, if the staff is not careful, it will touch the pull rod outside the vacuum pump, resulting in the loosening of the pull rod screw, or even the direct fracture of the pull rod by external force, thus causing the vacuum pump to fail to work properly. Even if the pull rod is not broken at that time, it may also implicitly cause the sealing glue between the vacuum pump side cover and the pump body to crack and displace, and in severe cases, the glue will come off, resulting in unstable vacuum degree, decreased gas volume, and even leakage of harmful gases during the operation of the equipment. Content of the Utility Model
[0004] In order to solve the technical problems of unstable vacuum degree, decreased gas volume, and even leakage of harmful gases during the operation of the vacuum pump existing in the prior art, the utility model provides the following technical solutions.
[0005] The utility model relates to an improved vacuum pump for chemical industry, which comprises a pump body and a main shaft coaxially sleeved with an impeller. Both ends of the pump body are respectively provided with a driving end side cover and a non-driving end side cover. The driving end side cover is connected with a driving side bearing component and a driving side sealing component. The non-driving end side cover is connected with a non-driving side bearing component and a non-driving side sealing component. A driving end distributor is connected between the driving end side cover and the pump body. A non-driving end distributor is connected between the non-driving end side cover and the pump body. Both ends of the pump body are respectively connected to the driving end side cover and the non-driving end side cover through connecting pieces with the same structure. One end of the pump body close to the driving end side cover and the driving end side cover are respectively provided with a first positioning stop and a second positioning stop which are matched with the driving end distributor. The pump body and the driving end side cover are respectively provided with a first sealing groove containing a first sealing ring and a second sealing groove containing a second sealing ring which are abutted against both sides of the driving end distributor. The inner walls of the pump body and the driving end side cover are respectively provided with a first sealing port and a second sealing port which are abutted against the driving end distributor. The first sealing port and the second sealing port are respectively connected with a first sealing pad and a second sealing pad.
[0006] As a further technical solution, the connecting piece comprises a bolt penetrating through the connecting end of the pump body and the connecting end of the driving end side cover, and a flat washer, an elastic gasket and a fastening nut located at one end of the bolt.
[0007] As a further technical solution, the first sealing ring, the second sealing ring, the first sealing pad and the second sealing pad are all made of corrosion-resistant rubber materials.
[0008] The beneficial effects of the utility model are as follows: by changing the original connecting mode of the pull rod of the vacuum pump and adopting a new sealing connection mode, the utility model eliminates many problems existing in the vacuum pump with the old structure in the chemical industry and plays a good role in stabilizing the working performance of the vacuum pump. The connections between both ends of the pump body and the driving end side cover and the non-driving end side cover are stable and have good sealing performance, which can ensure the normal performance indexes of the vacuum pump. At the same time, the noise, vibration and other phenomena during the operation of the vacuum pump are also greatly reduced, so that the vacuum pump can maintain a good working condition under harsh working conditions, avoiding gas leakage caused by many problems and ensuring the safety of chemical production. It not only maintains the simple disassembly of the vacuum pump, but also facilitates the annual equipment maintenance of users. Description of the Drawings
[0009] Figure 1 is a schematic cross-sectional plane view of the existing vacuum pump;
[0010] Figure 2 is a schematic cross-sectional plane view of the improved vacuum pump for chemical industry of the utility model;
[0011] Figure 3 isFigure 2 Schematic enlarged view of part A in
[0012] In the figure: 1 - pump body; 101 - first positioning stop; 102 - first sealing groove; 103 - first sealing port; 2 - impeller; 3 - main shaft; 4 - drive end side cover; 401 - second positioning stop; 402 - second sealing groove; 403 - second sealing port; 5 - non - drive end side cover; 6 - drive end distributor; 7 - non - drive end distributor; 8 - drive side bearing component; 9 - non - drive side bearing component; 10 - drive side sealing component; 11 - non - drive side sealing component; 12 - first sealing ring; 13 - second sealing ring; 14 - first sealing gasket; 15 - second sealing gasket; 16 - bolt; 17 - flat gasket; 18 - elastic gasket; 19 - fastening nut; 20 - pull rod. Specific embodiments
[0013] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0014] In the description of the present utility model, it should be understood that the terms "upper" and "lower", based on the orientation or position relationship shown in the accompanying drawings, are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.
[0015] As Figure 2 and Figure 3 shown, an improved chemical vacuum pump of the present utility model includes a pump body 1 and a main shaft 3 coaxial with the pump body 1. The pump body 1 is a high - quality stainless - steel anti - corrosion cast steel part. The main shaft 3 is shrink - fitted with an impeller 2, and the impeller 2 and the main shaft 3 form a rotor after shrink - fitting. Both ends of the pump body 1 are respectively provided with a drive end side cover 4 and a non - drive end side cover 5. The drive end side cover 4 is fixedly connected with a drive side bearing component 8 and a drive side sealing component 10 by bolts. The non - drive end side cover 5 is fixedly connected with a non - drive side bearing component 9 and a non - drive side sealing component 11 by bolts. The main shaft 3 is respectively connected with the drive side bearing component 8 and the drive side sealing component 10, as well as the non - drive side bearing component 9 and the non - drive side sealing component 11. One end of the main shaft 3 passing through the drive end side cover 4 is connected to the motor.
[0016] In a preferred embodiment, a drive - end distributor 6 is connected between the drive - end side cover 4 and the pump body 1, and a non - drive - end distributor 7 is connected between the non - drive - end side cover 5 and the pump body 1. Both ends of the pump body 1 are respectively connected to the drive - end side cover 4 and the non - drive - end side cover 5 through connectors with the same structure. Specifically, the connector includes a bolt 16 that penetrates through the connection end of the pump body 1 and the connection end of the drive - end side cover 4. One end of the bolt 16 is successively provided with a flat washer 17, an elastic washer 18, and a fastening nut 19. By screwing the fastening nut 19, the pump body 1 and the drive - end side cover 4 can be connected and fixed. The pump body 1 and the non - drive - end side cover 5 adopt the same connection and fixing method, which can avoid the connection method of the connecting rod 20 in the existing vacuum pump, reduce collision damage, and prevent the leakage of harmful gases. The non - drive - end side cover 5 and the pump body 1 adopt the same connection method, which will not be elaborated here.
[0017] In a preferred embodiment, a first positioning stop 101 and a second positioning stop 401 that are matched with the drive - end distributor 6 are respectively provided at one end of the pump body 1 close to the drive - end side cover 4 and the drive - end side cover 4. The first positioning stop 101 and the second positioning stop 401 are used to center and connect the drive - end distributor 6. The pump body 1 and the drive - end side cover 4 are respectively provided with a first sealing groove 102 and a second sealing groove 402 that abut against both sides of the drive - end distributor 6. The first sealing groove 102 and the second sealing groove 402 can be machined on the side surfaces of the pump body 1 and the drive - end side cover 4 by turning. The first sealing groove 102 and the second sealing groove 402 respectively accommodate a first sealing ring 12 and a second sealing ring 13, which can make the space between the drive - end distributor 6 and the drive - end side cover 4 and the space between the drive - end distributor 6 and the pump body 1 airtight, ensuring the sealing performance of the vacuum pump.
[0018] In a preferred embodiment, a first sealing port 103 and a second sealing port 403 that abut against the drive - end distributor 6 are respectively provided on the inner walls of the pump body 1 and the drive - end side cover 4. The first sealing port 103 and the second sealing port 403 can also be machined by turning. After machining and cleaning, a first sealing gasket 14 and a second sealing gasket 15 are respectively connected to the first sealing port 103 and the second sealing port 403, which can further ensure the sealing performance between the drive - end distributor 6 and the drive - end side cover 4 and the pump body 1. The above - mentioned first sealing ring 12, second sealing ring 13, first sealing gasket 14, and second sealing gasket 15 are all made of corrosion - resistant rubber materials.
[0019] The connection and sealing method of the non - drive - end distributor 7 with the pump body 1 and the non - drive - end side cover 5 adopts the same connection method as that of the drive - end distributor 6, which will not be elaborated here.
[0020] The preferred specific embodiments and examples of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above-mentioned embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.
Claims
1. An improved vacuum pump for chemical industry, comprising a pump body (1) and a main shaft (3) coaxially sleeved with an impeller (2) and thermally insulated, wherein two ends of the pump body (1) are respectively provided with a drive end side cover (4) and a non-drive end side cover (5), the drive end side cover 4 is connected with a drive side bearing component (8) and a drive side sealing component (10), the non-drive end side cover (5) is connected with a non-drive side bearing component (9) and a non-drive side sealing component (11), a drive end distributor (6) is connected between the drive end side cover (4) and the pump body (1), and a non-drive end distributor (7) is connected between the non-drive end side cover (5) and the pump body (1), and is characterized in that: Both ends of the pump body (1) are respectively connected to the drive end side cover (4) and the non-drive end side cover (5) through connectors with the same structure. One end of the pump body (1) close to the drive end side cover (4) and the drive end side cover (4) are respectively provided with a first positioning stop (101) and a second positioning stop (401) that match the drive end distributor (6). The pump body (1) and the drive end side cover (4) are respectively provided with a first sealing groove (102) containing a first sealing ring (12) and a second sealing groove (402) containing a second sealing ring (13) that abut against both sides of the drive end distributor (6). The inner walls of the pump body (1) and the drive end side cover (4) are respectively provided with a first sealing port (103) and a second sealing port (403) that abut against the drive end distributor (6). The first sealing port (103) and the second sealing port (403) are respectively connected with a first sealing gasket (14) and a second sealing gasket (15).
2. The improved vacuum pump for chemical industry according to claim 1, wherein: The connector includes a bolt (16) passing through the connection end of the pump body (1) and the connection end of the drive end side cover (4), and a flat gasket (17), an elastic gasket (18) and a fastening nut (19) located at one end of the bolt (16).
3. The improved vacuum pump for chemical industry according to claim 1, characterized in that: The first sealing ring (12), the second sealing ring (13), the first sealing gasket (14) and the second sealing gasket (15) are all made of corrosion-resistant rubber materials.