CN201386804Y - Two-way bellows hard-seated butterfly valve - Google Patents
Two-way bellows hard-seated butterfly valve Download PDFInfo
- Publication number
- CN201386804Y CN201386804Y CN200920113933U CN200920113933U CN201386804Y CN 201386804 Y CN201386804 Y CN 201386804Y CN 200920113933 U CN200920113933 U CN 200920113933U CN 200920113933 U CN200920113933 U CN 200920113933U CN 201386804 Y CN201386804 Y CN 201386804Y
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- China
- Prior art keywords
- valve
- bellows
- valve seat
- butterfly
- plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a butterfly valve, in particular to a two-way bellows hard-seated butterfly valve, comprising a valve body, a valve seat, a butterfly plate, a valve rod linked with the butterfly plate and an operation mechanism driving the valve rod to rotate, wherein the circumferential sealed work face of the butterfly plate is a slant conical face; and the corresponding work face of the valve seat is a slant face. The two-way bellows hard-seated butterfly valve is characterized in that a clearance is formed between the periphery of the valve seat and the inner wall of a channel of the valve body to form a suspension structure; an annular boss is arranged on the inner wall of the channel of the valve body, and the end face of the valve seat is connected with the end surface of the annular boss through bellows; an outer layer of the bellows is communicated with the clearance between the valve seat and the inner wall of the channel of the valve body; and the inner layer of the bellows is communicated with the channel of the valve body. When in use, the two-way bellows hard-seated butterfly valve has reliable sealing property against either forward flowing or reverse flowing medium, and also has simple and convenient operation.
Description
Technical field
The utility model relates to a kind of butterfly valve, particularly a kind of butterfly valve featuring two-way metallic seal of bellows.
Background technique
In the present hard seal butterfly valve, usually its valve seat is for maintaining static, in use, when medium is that reverse flow and this pressure medium are when big, then this pressure can push away and make butterfly plate that one displacement be arranged, thereby and form the gap between the valve seat and cause leakage, the solution that existing for this reason technology adopts is the warping force that increases valve rod, thereby strengthen the tight power of butterfly plate itself and valve seat when closing, stop medium that the impact of butterfly plate is made the butterfly plate displacement as much as possible with this, thereby to guarantee the sealability of valve; But but there is a bigger defective in this means: be exactly that valve is required great effort when opening and closing very much, thereby influence the convenience of valve operation.
The model utility content
The purpose of this utility model is the deficiency that solves existing hard seal butterfly valve, and provides a kind of operation light, reliable sealing butterfly valve featuring two-way metallic seal of bellows.
The purpose of this utility model is achieved through the following technical solutions: a kind of butterfly valve featuring two-way metallic seal of bellows, comprise valve body, valve seat, butterfly plate, valve rod that is connected with butterfly plate and the operating device that drives the valve rod rotation, the circumferential seal working surface of described butterfly plate is the awl inclined-plane, the working surface of described valve seat should be the inclined-plane mutually, it is characterized in that forming the gap between the vias inner walls of the outer circumferential side of described valve seat and valve body constitutes floated structure, on the vias inner walls of valve body, also be provided with annular boss, be connected by bellows between the end face of described valve seat and the end face of annular boss, the skin of this bellows communicates with gap between valve seat and the valve channel inwall, and the internal layer of this bellows communicates with valve channel.
Further, on the inwall of described valve body and the opposite side that is positioned at valve seat with respect to bellows also be provided with a positioning plate, this positioning plate and valve seat are separated by a distance.
Further again, the sealing surface working surface of described butterfly plate is made of the multilayer hard-seal inserts that corrosion resistant plate and flexible graphite plate constitute.
The beneficial effects of the utility model are: because valve seat is to be connected on the valve body by bellows, therefore when the medium forward circulates, bellows is stretched push away valve seat is compressed to butterfly plate thereby pressure medium enters the skin of bellows from all side clearances of the passage of valve seat and valve body, thereby play the reliable sealing effect; And when the medium reverse circulated,, pressure medium its stretching, extension is pushed away valve seat is compressed to butterfly plate, also can play the reliable sealing effect thereby entering the internal layer of bellows; Therefore the utility model need not increase the warping force of valve rod owing to being to push away by pressure medium to make the displacement of valve seat realize reliable sealing, light, laborsaving thereby valve is operated in opening-closing process, in terms of existing technologies, has obvious improvement.
Description of drawings
Fig. 1 is the utility model embodiment's a plan view
Fig. 2 is the sectional view of Fig. 1
Fig. 3 is the I place enlarged view of Fig. 2
Embodiment
Now in conjunction with the accompanying drawings the utility model is further described:
As shown in Figure 1 to Figure 3, the embodiment of a kind of butterfly valve featuring two-way metallic seal of bellows of the utility model, comprise valve body 2, valve seat 5, butterfly plate 3, valve rod 4 that is connected with butterfly plate 3 and the operating device 1 that drives valve rod 4 rotations, in the diagram, this operating device 1 is made up of handwheel 11 and worm-and-wheel gear 12, the circumferential seal working surface 31 of described butterfly plate 3 is the awl inclined-plane, the working surface 51 of described valve seat 5 should be the inclined-plane mutually, form the gap between the vias inner walls of the outer circumferential side of described valve seat 5 and valve body 2 and constitute floated structure, on the vias inner walls of valve body 2, also be provided with annular boss 21, be connected by bellows 6 between the end face of the end face of described valve seat 5 and annular boss 21, the skin 61 of this bellows 6 communicates with gap 22 between valve seat 5 and the valve channel inwall, and the internal layer 62 of this bellows 6 communicates with valve channel 23.When medium forward circulation is promptly flowed from left to right, thereby thereby pressure medium enters the skin 61 of bellows 6 from all side clearances of valve seat 5 and the passage of valve body 2 make bellows 6 stretch to push away to make valve seat 5 utilize inclined-plane and butterfly plate 3 to compress sealing to left dislocation; And when medium oppositely promptly circulates from right to left, thereby, pressure medium its stretching, extension is also pushed away make valve seat 5 utilize inclined-plane and butterfly plate 3 to compress sealing to left dislocation thereby entering the internal layer 62 of bellows 6, therefore present embodiment in use, no matter medium is forward circulation or reverse circulated, the sealability of valve is all very reliable, and owing to present embodiment is to push away the displacement that makes valve seat 5 by pressure medium to realize reliable sealing, be that valve seat floats, so valve is operated light, laborsaving in opening-closing process; Obvious, even the operating device in the present embodiment adopts as the automatic manipulation mechanism of electronic or the formula of surging,, also can reduce the power of motor or oil hydraulic cylinder effectively because valve seat adopts illustrated structure, thereby can reduce cost, therefore also have positive effect.
In the present embodiment, on the inwall of described valve body 2 and be arranged in valve seat 5 the opposite side with respect to bellows 6 (figure be the left side, just between valve rod 4 and the valve seat 5) also be provided with a positioning plate 7, this positioning plate 7 is separated by a distance with valve seat 5, be provided with this positioning plate 7 and can play position-limiting action valve seat 5, particularly valve is under opening state, pressure medium pushes away and makes valve seat 5 to left dislocation, and just can avoid valve seat 5 excessively to move to left owing to be provided with this positioning plate 7, thereby can guarantee the action of valve, can prevent bellows 6 hyper-extended again and fatigue occur, thereby help guaranteeing the life-span that bellows 6 uses.
In the present embodiment, the sealing surface working surface 31 of described butterfly plate 3 is made of the multilayer hard-seal inserts that corrosion resistant plate and flexible graphite plate constitute.Even the hard sealing surface that obviously adopts other also undoubtedly belongs to protection domain of the present utility model as the mode at all side built-up welding hard metal layers of butterfly plate.
Claims (3)
1. butterfly valve featuring two-way metallic seal of bellows, comprise valve body, valve seat, butterfly plate, valve rod that is connected with butterfly plate and the operating device that drives the valve rod rotation, the circumferential seal working surface of described butterfly plate is the awl inclined-plane, the working surface of described valve seat should be the inclined-plane mutually, it is characterized in that forming the gap between the vias inner walls of the outer circumferential side of described valve seat and valve body constitutes floated structure, on the vias inner walls of valve body, also be provided with annular boss, be connected by bellows between the end face of described valve seat and the end face of annular boss, the skin of this bellows communicates with gap between valve seat and the valve channel inwall, and the internal layer of this bellows communicates with valve channel.
2. butterfly valve featuring two-way metallic seal of bellows according to claim 1 is characterized in that: on the inwall of described valve body and the opposite side that is positioned at valve seat with respect to bellows also be provided with a positioning plate, this positioning plate and valve seat are separated by a distance.
3. butterfly valve featuring two-way metallic seal of bellows according to claim 1 and 2 is characterized in that: the sealing surface working surface of described butterfly plate is made of the multilayer hard-seal inserts that corrosion resistant plate and flexible graphite plate constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920113933U CN201386804Y (en) | 2009-02-13 | 2009-02-13 | Two-way bellows hard-seated butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920113933U CN201386804Y (en) | 2009-02-13 | 2009-02-13 | Two-way bellows hard-seated butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201386804Y true CN201386804Y (en) | 2010-01-20 |
Family
ID=41579337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920113933U Expired - Lifetime CN201386804Y (en) | 2009-02-13 | 2009-02-13 | Two-way bellows hard-seated butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201386804Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532571B (en) * | 2009-02-13 | 2011-02-02 | 浙江石化阀门有限公司 | Butterfly valve featuring two-way metallic seal of bellows |
| CN103994240A (en) * | 2014-05-30 | 2014-08-20 | 安徽铜都流体科技股份有限公司 | Two-way hard sealing butterfly valve with movable valve seat |
| CN105508634A (en) * | 2016-01-18 | 2016-04-20 | 株洲南方阀门股份有限公司 | Two-way metal hard-sealed butterfly valve |
-
2009
- 2009-02-13 CN CN200920113933U patent/CN201386804Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532571B (en) * | 2009-02-13 | 2011-02-02 | 浙江石化阀门有限公司 | Butterfly valve featuring two-way metallic seal of bellows |
| CN103994240A (en) * | 2014-05-30 | 2014-08-20 | 安徽铜都流体科技股份有限公司 | Two-way hard sealing butterfly valve with movable valve seat |
| CN105508634A (en) * | 2016-01-18 | 2016-04-20 | 株洲南方阀门股份有限公司 | Two-way metal hard-sealed butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100120 Effective date of abandoning: 20090213 |