CN214946458U - Large-diameter soft-sealing anti-corrosion butterfly valve - Google Patents
Large-diameter soft-sealing anti-corrosion butterfly valve Download PDFInfo
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- CN214946458U CN214946458U CN202121383182.7U CN202121383182U CN214946458U CN 214946458 U CN214946458 U CN 214946458U CN 202121383182 U CN202121383182 U CN 202121383182U CN 214946458 U CN214946458 U CN 214946458U
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Abstract
The utility model relates to a large-diameter soft-sealing anti-corrosion butterfly valve, which comprises a valve body, a butterfly plate, a valve rod and a driving device, wherein the butterfly plate is provided with an upper mounting hole and a lower mounting hole, and the upper mounting hole and the lower mounting hole are respectively fixedly connected with an upper valve rod and a lower valve rod; the method is characterized in that: automatic compensation sealing devices are respectively arranged between the outer circumferences of the upper valve rod and the lower valve rod and between the valve body and the butterfly plate, so that the sealing performance between the butterfly plate at the position of the valve rod and the valve body is improved; the inner wall of the valve body channel and the surface of the butterfly plate are lined with the PTFE lining, so that the corrosion resistance is improved. The sealing device has the advantages of reliable sealing performance, long service life of products and the like.
Description
Technical Field
The utility model belongs to the valve field especially relates to a heavy-calibre butterfly valve. The utility model is suitable for a control valve of water supply system pipeline, city sewage pipes.
Background
The butterfly valve is widely used as a control valve on a medium conveying pipeline in various fields of national economy due to the characteristics of simple structure, convenient opening and closing, low manufacturing cost and the like. The advantages are especially prominent on the large caliber pipeline of the urban water supply and sewage system. At present, a large-diameter butterfly valve structure used in a city water supply and sewage system generally comprises a valve body, a butterfly plate, a valve rod and a driving device, wherein the driving device drives the butterfly plate to rotate through the valve rod, so that the butterfly plate is opened or closed. When the valve is closed, the outer circular surface of the butterfly plate is in press fit with the inner wall of the valve body channel to form a sealing pair. However, the main problems of the existing large-diameter butterfly valve are as follows: in a closed state, the sealing specific pressure between the butterfly plate positioned at the valve rod and the valve body is low, so that leakage is easy to occur; on the sewage discharge pipeline, the medium has strong corrosivity, and the valve body and the butterfly plate are easy to corrode to influence the sealing performance and the service life of the product.
Disclosure of Invention
The utility model aims at solving the problems in the prior art, the large-caliber soft-sealing anti-corrosion butterfly valve with corrosion resistance, good sealing performance and long service life is provided.
The technical scheme of the utility model comprises a valve body, a butterfly plate, a valve rod and a driving device, wherein the butterfly plate is provided with an upper mounting hole and a lower mounting hole which are respectively fixedly connected with the upper valve rod and the lower valve rod; the method is characterized in that: automatic compensation sealing devices are respectively arranged between the outer circumferences of the upper valve rod and the lower valve rod and between the valve body and the butterfly plate, each automatic compensation sealing device consists of a rubber sealing ring, a sealing gasket and a disc spring, annular sealing grooves are respectively arranged on the butterfly plates on the outer circumferences of the upper valve rod and the lower valve rod, one end of each rubber sealing ring is embedded in each annular sealing groove in a dynamic sealing mode, the other end of each rubber sealing ring is installed between the outer circumferences of the upper valve rod and the lower valve rod and the valve body, and the rubber sealing rings are elastically pressed and sealed through a pressing ring, the disc springs and the sealing gaskets; the inner wall of the valve body channel and the surface of the butterfly plate are lined with tetrafluoro lining.
In the technical scheme, the valve body is formed by connecting an upper valve body and a lower valve body through bolts and nuts, and the upper valve body and the lower valve body are vertically symmetrically installed relative to the valve body through a central line.
Compared with the prior art, the utility model beneficial effect be: automatic compensation sealing devices are respectively arranged between the outer circumferences of the upper valve rod and the lower valve rod and between the valve body and the butterfly plate, so that the sealing performance between the butterfly plate at the position of the valve rod and the valve body is improved; the inner wall of the valve body channel and the surface of the butterfly plate are lined with the PTFE lining, so that the corrosion resistance is improved. The sealing device has the advantages of reliable sealing performance, long service life of products and the like.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the valve comprises a valve body 1, a lower valve rod 2, a butterfly plate 3, a bolt 4, a cylindrical pin 5, a rubber sealing ring 6, a sealing gasket 7, a butterfly spring 8, an upper valve rod 9, a pressing ring 10 and a driving device 11.
Detailed Description
The large-caliber soft-sealing anticorrosive butterfly valve shown in fig. 1 comprises a valve body 1, a butterfly plate 3, a valve rod and a driving device 11, wherein the butterfly plate 3 is provided with an upper mounting hole and a lower mounting hole, the valve rod consists of an upper valve rod 9 and a lower valve rod 2, the upper mounting hole and the lower mounting hole are respectively fixedly connected with the upper valve rod 9 and the lower valve rod 2, the lower end of the upper valve rod 9 is inserted into the upper mounting hole of the butterfly plate 3 and fixedly mounted by a cylindrical pin 5, the upper end of the upper valve rod 9 is in transmission connection with the driving device 11, the upper end of the lower valve rod 2 is inserted into the lower mounting hole of the butterfly plate 3 and fixedly mounted by the cylindrical pin, the lower end of the upper valve rod is mounted in a positioning hole of the valve body 1 by a bearing and a bottom cover, and the outer circular surface of the butterfly plate 3 is matched with the channel inner wall of the valve body 1 to form a sealing pair; the method is characterized in that: automatic compensation sealing devices are respectively arranged between the outer circumferences of the upper valve rod 9 and the lower valve rod 2 and the valve body 1 and the butterfly plate 3, namely, the automatic compensation sealing devices are arranged between the outer circumference of the upper valve rod 9 and the valve body 1 and the butterfly plate 3, the automatic compensation sealing devices are arranged between the outer circumference of the lower valve rod 2 and the valve body 1 and the butterfly plate 3, each automatic compensation sealing device comprises a rubber sealing ring 6, a sealing gasket 7 and a disc spring 8, annular sealing grooves are respectively arranged on the butterfly plates 3 on the outer circumferences of the upper valve rod 9 and the lower valve rod 2, one end of each rubber sealing ring 6 is embedded in each annular sealing groove and is in dynamic sealing fit with the annular sealing grooves, the other end of each rubber sealing ring is arranged in a sealing cavity between the outer circumferences of the upper valve rod 9 and the lower valve rod 2 and the valve body 1 and is elastically and hermetically arranged through a pressing ring 10, the disc springs 8 and the sealing gaskets 7, and the rubber sealing rings 6 are tightly arranged in the annular sealing grooves of the disc plates 3 and the sealing cavities of the valve body 1 by utilizing the elastic force of the disc springs 8, the sealing force is automatically compensated, and the problem of sealing leakage between the valve body 1 and the butterfly plate 3 at the valve rod is solved; the inner wall of the channel of the valve body 1 and the surface of the butterfly plate 3 are lined with the tetrafluoro lining, so that the service performance of the product in corrosive media is improved, and the service life of the product is prolonged.
The valve body 1 is formed by connecting an upper valve body and a lower valve body through a bolt 4 and a nut, the machining precision of a product is improved, the assembling process of the butterfly plate 3 is facilitated, the upper valve body and the lower valve body are vertically symmetrically installed relative to the valve body through a central line, and namely the upper valve body and the lower valve body are symmetrically connected at the vertical position of the central line of a channel of the valve body 1.
Claims (2)
1. A large-diameter soft-sealing anticorrosive butterfly valve comprises a valve body (1), a butterfly plate (3), a valve rod and a driving device (11), wherein the butterfly plate (3) is provided with an upper mounting hole and a lower mounting hole, the valve rod consists of an upper valve rod (9) and a lower valve rod (2), the upper mounting hole and the lower mounting hole are respectively and fixedly connected with the upper valve rod (9) and the lower valve rod (2), and the outer circular surface of the butterfly plate (3) is matched with the inner wall of a channel of the valve body (1) to form a sealing pair; the method is characterized in that: automatic compensation sealing devices are respectively arranged between the outer circumferences of the upper valve rod (9) and the lower valve rod (2) and the valve body (1) and the butterfly plate (3), each automatic compensation sealing device consists of a rubber sealing ring (6), a sealing gasket (7) and a disc spring (8), annular sealing grooves are respectively arranged on the butterfly plates (3) at the outer circumferences of the upper valve rod (9) and the lower valve rod (2), one end of each rubber sealing ring (6) is embedded in each annular sealing groove and is in dynamic sealing fit with the annular sealing grooves, the other end of each rubber sealing ring is arranged in a sealing cavity between the outer circumferences of the upper valve rod (9) and the lower valve rod (2) and the valve body (1), and the rubber sealing rings, the disc springs (8) and the sealing gaskets (7) are elastically pressed, sealed and installed; the inner wall of the channel of the valve body (1) and the surface of the butterfly plate (3) are lined with tetrafluoro lining.
2. The large-caliber soft-sealing anti-corrosion butterfly valve according to claim 1, characterized in that: the valve body (1) is formed by connecting an upper valve body and a lower valve body through a bolt (4) and a nut, and the upper valve body and the lower valve body are vertically symmetrically arranged relative to the valve body through a central line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121383182.7U CN214946458U (en) | 2021-06-22 | 2021-06-22 | Large-diameter soft-sealing anti-corrosion butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121383182.7U CN214946458U (en) | 2021-06-22 | 2021-06-22 | Large-diameter soft-sealing anti-corrosion butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214946458U true CN214946458U (en) | 2021-11-30 |
Family
ID=79049234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121383182.7U Active CN214946458U (en) | 2021-06-22 | 2021-06-22 | Large-diameter soft-sealing anti-corrosion butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214946458U (en) |
-
2021
- 2021-06-22 CN CN202121383182.7U patent/CN214946458U/en active Active
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