CN2665474Y - An elliptical board butterfly valve - Google Patents
An elliptical board butterfly valve Download PDFInfo
- Publication number
- CN2665474Y CN2665474Y CN 200320104726 CN200320104726U CN2665474Y CN 2665474 Y CN2665474 Y CN 2665474Y CN 200320104726 CN200320104726 CN 200320104726 CN 200320104726 U CN200320104726 U CN 200320104726U CN 2665474 Y CN2665474 Y CN 2665474Y
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- CN
- China
- Prior art keywords
- valve
- plate
- valve plate
- butterfly valve
- sealing
- Prior art date
- 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 discloses an elliptic plate butterfly valve, which comprises a valve body, a valve plate and a valve rod. The valve plate is in ellipse, whose length of a long axis direction is longer than the inner diameter of the valve body; the length of a short axis direction is shorter than the inner diameter of the valve body. A short axis of the valve plate is arranged on the centre line of the valve rod. The utility model is characterized in that a sealing groove is arranged on a sealing surface of the valve plate; a sealing ring is arranged in the sealing groove. The utility model has the advantages that the polytetrafluoroethylene sealing ring has fine self-lubricating performance and sealing performance, long service life and is wear-resistant; an interference fit is formed between the valve body and the valve plate; the sealing performance of the valve is improved greatly, the leakage rate is lower than 0.2 percent, which can satisfy the requirement of an adjusting butterfly valve.
Description
Technical field
The utility model relates to a kind of butterfly valve, and relating in particular to a kind of valve plate is oval-shaped adjustable butterfly valve.
Background technique
Butterfly valve is to place a valve plate at the cylindrical valve seat inner chamber, and valve plate drives backspin to be changeed on valve shaft ground, realizes the function of opening, closing and regulating flow.The valve plate of butterfly valve is circular, can do 90 degree rotations, is unlikely to block for valve plate is rotated, and must leave the gap between valve seat and the sealing surface of valve plate, thereby form annular leakage way, and leakage rate is bigger.This is undoubtedly a very big defective for the adjustable butterfly valve that leakage rate is had relatively high expectations.Therefore, there is the people that this is improved, invented oval valve plate butterfly valve (as shown in Figure 1 and Figure 2).The valve plate of this butterfly valve is oval, and its major axis is greater than valve seat bore; Minor axis is then less than valve seat bore (promptly gapped), valve rod is located on the minor axis, closed position valve plate and valve body inner bore center line angle are 80 ° ± 8%, two major semi axis directions and valve base chamber form hard sealing structure, the leakage way of valve is dwindled by annular become two little crescent shape, improved the sealability of valve to a certain extent, reduced leakage rate, leak-down rate reduces to 0.2% by 5%.But,, be difficult to make adjustable butterfly valve to reach the requirement of higher sealability because the semi-minor axis direction still has two crescent-shaped lands.
Summary of the invention
The purpose of this utility model is a sealability of further improving the ellipse butterfly valve, and a kind of do not have gap, novel adjustable butterfly valve that leakage rate is very little are provided.The technical solution that realizes this purpose is:
A kind of ellipse butterfly valve, comprise valve body, valve plate, valve rod, described valve plate is oval, the length of its long axis direction is greater than valve block internal diameter, the length of short-axis direction is less than valve block internal diameter, valve rod is characterised in that on the minor axis of valve plate: the sealing surface of valve plate is provided with seal groove, lays nonmetal stuffing box packing for example teflin ring or rubber seal in the seal groove.
When seal groove used teflin ring, the sectional shape of seal groove was L shaped, and seal groove opening one side is provided with pressing plate, and pressing plate is connected to integral body by link and valve plate, and seal ring is fixed on the valve plate.Link can be used screw.
The utility model has the advantages that: owing to adopt elastic packing, during valve closing, constitute interference fit between valve body, the valve plate, especially polytetrafluoroethylmaterial material has good self-lubricating property, sealability, and wear-resistant, the life-span is long, the sealability of valve is improved greatly, leakage rate is very little, below 0.2%, can satisfy the requirement of adjustable butterfly valve.
Description of drawings
Fig. 1 is the structural representation of existing ellipse butterfly valve.
Fig. 2 is the B-B view of Fig. 1.
Fig. 3 is a kind of structural representation of the present utility model.
Fig. 4 is the local A enlarged view of Fig. 3.
Embodiment
Describe particular content of the present utility model in detail below in conjunction with accompanying drawing.
Referring to Fig. 3, Fig. 4: the ellipse butterfly valve comprises valve body 4, valve shaft 3, valve plate 2, valve plate 2 is oval, the length of its long axis direction is greater than the internal diameter of valve body 4, the length of short-axis direction is less than the internal diameter of valve body 4, the minor axis of valve plate 2 is on the center line of valve rod 3, the sealing surface of valve plate 2 is provided with seal groove, and adaptive seal ring 1 is arranged in the groove.Preferably use teflin ring, polytetrafluoroethylmaterial material has good self-lubricating property, sealability, and wear-resistant, the life-span is long.Also can use rubber seal.
When using teflin ring, necessary sealing configuration reasonable in design makes seal ring firm, stable, the performance of competence exertion material; Simultaneously, because the elasticity of polytetrafluoroethylmaterial material is lower, can not put into seal groove with the method that stretches as rubber seal, therefore, the sectional shape of seal groove is preferably L shaped, and promptly a side of seal groove is an opening, and opening one side is established pressing plate 5, pressing plate 5 is connected to integral body by link 6 and valve plate 2, seal ring 1 is fixed on the valve plate 2, like this, just can adorns, tear open seal ring 1 easily.
Claims (3)
1. ellipse butterfly valve, comprise valve body, valve plate, valve rod, described valve plate is oval, the length of its long axis direction is greater than valve block internal diameter, the length of short-axis direction is less than valve block internal diameter, the minor axis of valve plate is characterized in that on the center line of valve rod: the sealing surface of valve plate is provided with seal groove, is provided with elastic seal ring in the seal groove.
2. ellipse butterfly valve according to claim 1 is characterized in that: the sectional shape of described seal groove is L shaped, and seal groove opening one side is provided with pressing plate, and pressing plate is connected to integral body by link and valve plate, and seal ring is fixed on the valve plate.
3. ellipse butterfly valve according to claim 2 is characterized in that: described link is a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320104726 CN2665474Y (en) | 2003-12-30 | 2003-12-30 | An elliptical board butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320104726 CN2665474Y (en) | 2003-12-30 | 2003-12-30 | An elliptical board butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2665474Y true CN2665474Y (en) | 2004-12-22 |
Family
ID=34340956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320104726 Expired - Lifetime CN2665474Y (en) | 2003-12-30 | 2003-12-30 | An elliptical board butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2665474Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061336A (en) * | 2013-03-20 | 2014-09-24 | 陈润谦 | Flow controller |
-
2003
- 2003-12-30 CN CN 200320104726 patent/CN2665474Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061336A (en) * | 2013-03-20 | 2014-09-24 | 陈润谦 | Flow controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131230 Granted publication date: 20041222 |