CN202149234U - Eccentric fireproof butterfly valve - Google Patents
Eccentric fireproof butterfly valve Download PDFInfo
- Publication number
- CN202149234U CN202149234U CN201120282171U CN201120282171U CN202149234U CN 202149234 U CN202149234 U CN 202149234U CN 201120282171 U CN201120282171 U CN 201120282171U CN 201120282171 U CN201120282171 U CN 201120282171U CN 202149234 U CN202149234 U CN 202149234U
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- CN
- China
- Prior art keywords
- valve
- butterfly
- plate
- butterfly plate
- eccentric
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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
An eccentric fireproof butterfly valve solves the problem that butterfly valves are easy to damage and sealing property is changed to be poor under the high temperature and comprises a valve body, a valve rod, a butterfly plate and a pressing plate. The valve rod is arranged on the valve body, the butterfly plate is fixed in a valve cavity of the valve body through the valve rod and can rotate around the valve rod, the pressing plate is arranged on the butterfly plate, a soft seal ring is arranged in an annular groove formed between the butterfly plate and the pressing plate, a valve seat is arranged on the valve body on the position of a valve cavity opening, and a conical surface matched with a valve seat sealing face is arranged on the butterfly plate. The eccentric fireproof butterfly valve has a double seal coordination structure of soft seal and hard seal, the soft seal can ensure zero leakage rate, the hard seal can ensure sufficient strength, and a soft sealing element is matched with a butterfly plate sealing face to seal in normal work. Even though the soft seal is damaged, the butterfly plate is still sealed with the valve seat sealing face, and a sealing state of the valve can continuously maintained, thereby avoiding fire hazards caused by leakage of inflammable and explosive media. The eccentric fireproof butterfly valve is high in reliability and good in fireproof performance.
Description
Technical field
The utility model relates to a kind of valve, is specifically related to a kind of eccentric fire prevention butterfly valve.
Background technique
The butterfly plate of butterfly valve is installed on the diametric(al) of pipeline.In the butterfly valve body cylindrical channel, the disc butterfly plate rotates around axis, and angle of swing is that when rotating to 90 °, valve then is in full-gear between 0 °-90 °.Butterfly valve structure is simple, volume is little, in light weight, only form by few parts.And only need half-twist to get final product fast opening and closing, simple to operate, this valve has good fluid control characteristic simultaneously.When butterfly valve was in full open position, butterfly plate thickness was MEDIA FLOW unique resistance when valve body, therefore fall through the pressure that this valve produced very little, so have metering characteristics preferably.But existing butterfly plate and valve seat are in extruding, scraping state all the time, and resistance is apart from big, quick abrasion.For overcoming extruding, scraping, guaranteeing sealability; Valve seat adopts rubber or teflon elastomeric material basically; But also thereby in use receive the restriction of temperature, rubber or teflon elastomeric material are damaged easily and are caused butterfly valve to leak when high temperature, have great potential safety hazard.Though and the butterfly valve of hard sealing can be high temperature resistant, leakage problem is serious.
Summary of the invention
Damage easily for overcoming the butterfly valve mentioned in background butterfly valve when the hot operation, the technical problem of sealing variation, it is a kind of both high temperature resistant that the utility model provides, again the eccentric fire prevention of reliable sealing butterfly valve.
The technological scheme of the utility model is: a kind of eccentric fire prevention butterfly valve; Comprise valve body, valve rod, butterfly plate and pressing plate, described valve rod is installed on the valve body, and described butterfly plate is fixed in the valve pocket of valve body and can rotates around valve rod by valve rod; Described butterfly plate is provided with pressing plate; Be provided with the soft seal circle in the circular groove that forms between described butterfly plate and the pressing plate, described valve body is provided with valve seat at the valve pocket mouth, and described butterfly plate is provided with the conical surface that matches with sealing surface of seat.
As a kind of improvement of the utility model, described pressing plate is provided with the conical surface that matches with sealing surface of seat.
As a kind of improvement of the utility model, described butterfly plate is forming cone match near soft seal circle place to valve seat protrusion and valve seat.
Another kind as the utility model improves, and described pressing plate is forming cone match near soft seal circle place to valve seat protrusion and valve seat.
The beneficial effect of the utility model is; Owing to have soft seal circle and the such double seal cooperating structure of the formed hard sealing surface of butterfly plate sealing surface; Soft seal can guarantee the zero leakage rate; And hard sealing can guarantee enough intensity, during proper functioning by the sealing that cooperatively interacts of soft seal and butterfly plate sealing surface.Even when soft seal appearance damage, butterfly plate and sealing surface of seat still keep sealing, continue to keep the sealing state of valve, prevent inflammable and explosive dielectric leakage breaking out of fire accident, its sealing reliability height, fireproof performance is good.
Description of drawings
Accompanying drawing 1 is the utility model embodiment's a structural representation.
Accompanying drawing 2 is the sectional view of Fig. 1 among the utility model embodiment.
Accompanying drawing 3 is the enlarged view at the I place of Fig. 2 among the utility model embodiment.
Among the figure, valve body 1, valve seat 11, valve rod 2, butterfly plate 3, pressing plate 4, soft seal circle 5.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described further:
Combine Fig. 2, shown in Figure 3 by Fig. 1, a kind of eccentric fire prevention butterfly valve comprises valve body 1, valve rod 2, butterfly plate 3 and pressing plate 4; Described valve rod 2 is installed on the valve body 1; Described butterfly plate 3 is fixed in the valve pocket of valve body 1 and can rotates around valve rod 2 by valve rod 2, described butterfly plate 3 is provided with pressing plate 4, is provided with soft seal circle 5 in the circular groove that forms between described butterfly plate 3 and the pressing plate 4; Described valve body 1 is provided with valve seat 11 at the valve pocket mouth; Described butterfly plate 3 is provided with the conical surface that matches with valve seat 11 sealing surfaces, and described pressing plate 4 is provided with the conical surface that matches with valve seat 11 sealing surfaces, and described butterfly plate 3 is forming cone match near soft seal circle 5 places to valve seat 11 protrusions and valve seat 11 with pressing plate 4; Described butterfly plate 3, pressing plate 4, valve seat 11 and soft seal circle 5 process the conical surface together; Not only processing is simple, and sealing surface can coincide again completely, good sealing effect.Butterfly valve is owing to have soft seal circle and the such double seal cooperating structure of the formed hard sealing surface of butterfly plate sealing surface; Soft seal can guarantee the zero leakage rate; And hard sealing can guarantee enough intensity, during proper functioning by the sealing that cooperatively interacts of soft seal and butterfly plate sealing surface.Even when soft seal appearance damage, butterfly plate and sealing surface of seat still keep sealing, continue to keep the sealing state of valve, prevent inflammable and explosive dielectric leakage breaking out of fire accident, its sealing reliability height, fireproof performance is good.
Every technician's notice: though the utility model is described according to above-mentioned embodiment; But the invention thought of the utility model is not limited in this model utility; The repacking of any utilization inventive concept all will be included in this patent scope of patent protection.
Claims (4)
1. eccentric fire prevention butterfly valve; Comprise valve body (1), valve rod (2), butterfly plate (3) and pressing plate (4); Described valve rod (2) is installed on the valve body (1); Described butterfly plate (3) is fixed in the valve pocket of valve body (1) by valve rod (2) and can rotates around valve rod (2), and described butterfly plate (3) is provided with pressing plate (4), is provided with soft seal circle (5) in the circular groove of formation between described butterfly plate (3) and the pressing plate (4); Described valve body (1) is provided with valve seat (11) at the valve pocket mouth, it is characterized in that: described butterfly plate (3) is provided with the conical surface that matches with valve seat (11) sealing surface.
2. eccentric fire prevention butterfly valve according to claim 1 is characterized in that described pressing plate (4) is provided with the conical surface that matches with valve seat (11) sealing surface.
3. eccentric fire prevention butterfly valve according to claim 1 is characterized in that described butterfly plate (3) locating to form cone match to valve seat (11) protrusion and valve seat (11) near soft seal circle (5).
4. eccentric fire prevention butterfly valve according to claim 2 is characterized in that described pressing plate (4) locating to form cone match to valve seat (11) protrusion and valve seat (11) near soft seal circle (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120282171U CN202149234U (en) | 2011-08-04 | 2011-08-04 | Eccentric fireproof butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120282171U CN202149234U (en) | 2011-08-04 | 2011-08-04 | Eccentric fireproof butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202149234U true CN202149234U (en) | 2012-02-22 |
Family
ID=45590293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120282171U Expired - Lifetime CN202149234U (en) | 2011-08-04 | 2011-08-04 | Eccentric fireproof butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202149234U (en) |
-
2011
- 2011-08-04 CN CN201120282171U patent/CN202149234U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120222 |