CN202901324U - Double eccentric soft seal butterfly valve - Google Patents
Double eccentric soft seal butterfly valve Download PDFInfo
- Publication number
- CN202901324U CN202901324U CN 201220612931 CN201220612931U CN202901324U CN 202901324 U CN202901324 U CN 202901324U CN 201220612931 CN201220612931 CN 201220612931 CN 201220612931 U CN201220612931 U CN 201220612931U CN 202901324 U CN202901324 U CN 202901324U
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- valve
- sealing surface
- valve plate
- double eccentric
- eccentric
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Abstract
The utility model provides a double eccentric soft seal butterfly valve comprises a valve plate. A chamfer is arranged on the upper sealing surface and/or the lower sealing surface. A certain angular deviation is formed between the center line of a valve body and the central axis of a valve plate sealing surface. Compared with the prior art, the double eccentric soft seal butterfly valve enables special equipment to perform micro chamfering to the double eccentric valve plate, the processing method is simple, and sealing effect is reliable. Mechanical wear and abrasion between the valve plate sealing surface and a valve base sealing surface is reduced, service life of a valve is prolonged, and reliability of the valve is improved.
Description
Technical field
The present invention relates to the valve applications field, relate in particular to a kind of application of butterfly valve, specifically a kind of pair of eccentric flexible sealing butterfly valve.
Background technique
Butterfly valve is again Flap valve, is a kind of modulating valve simple in structure, also can be used for the switch control of low pressure pipeline medium simultaneously.Butterfly valve refers to that closure member (valve plate or butterfly plate) is disk, centers on a kind of valve that valve shaft rotates to reach open and close, and main rising cut off and throttling action on pipeline.The butterfly valve open-shut device is a discoidal valve plate, and the axis around himself in valve body rotates, thereby reaches the purpose that opens and closes or regulate.The present widely used double eccentric butterfly valve that comprises, its structure characteristic was for both having departed from the valve plate center in the valve rod axle center, also depart from the valve body center, the relative sealing surface of seat of sealing surface of valve plate has an effect that gradually goes out to break away from and be fade-in extruding when valve opening and closing, thereby mechanical wear and scratch when having reduced keying between valve plate and the valve seat, but because its sealing principle belongs to the position seals structure, be that valve plate is that line contacts with the sealing surface of valve seat, the resiliently deformable that causes by valve plate extruding valve seat produces sealing effect, the mechanical wear of sealing surface of valve plate and sealing surface of seat and scratch are still larger like this, the working life of having reduced valve.
For addressing the above problem, Yi Bian in the valve rod shaft core position off-centre of two off-centre, the cone type axis deviation that makes sealing surface of valve plate in the body cylinder axis, that is to say, increase for the third time the eccentric so that sealing section of butterfly plate no longer be proper circle but ellipse, its sealing surface shape also so asymmetric, favour body center line, another side and then be parallel to the body center line.This for the third time eccentric maximum characteristics be exactly fundamentally changed seal construction, no longer be position seals but torsion sealing, namely be not to rely on the resiliently deformable of valve seat but rely on the surface of contact of valve seat to press to reach sealing effect fully, but original like this double eccentric butterfly valve just can't reuse again, cause waste, do not utilized sustainable development.
Summary of the invention
It is simple that the technical problems to be solved in the utility model provides a kind of processing mode, good sealing effect, two eccentric flexible sealing butterfly valves of valve long service life.
The technical solution of the utility model is, a kind of pair of eccentric flexible sealing butterfly valve, comprise valve body, valve seat, eccentric shaft and the valve plate on eccentric shaft of being coupling, upper sealing surface and/or the lower sealing surface of described valve plate have chamfering, have the several angle deviation between described valve body center line and the sealing surface of valve plate central axis, above-mentioned upper sealing surface, lower sealing surface all adopt the mode of soft seal to seal.
Adopt technique scheme, the magnitude of interference that rigidly connects when touching at valve closing valve plate and valve seat can suitably reduce suitable amount, thereby reduce distance and the contact length of the friction of valve plate and valve seat, prolong the working life of valve seat, reduce the switching torque of valve, this processing mode is simple, the two way sealed of existing pair of eccentric flexible sealing butterfly valve is reliable, reduce again mechanical wear and the scratch of sealing surface of valve plate and sealing surface of seat, prolonged the working life of valve, improved the reliability of valve.
As preferably, described upper sealing surface and/or lower sealing surface are ellipsoid.This preferred version is so that the sealing section of butterfly plate is two eccentric seal surfaces, and valve plate is closed or open the valve plate of pouring part into, adopts three eccentric chamfers, and chamfered part is augular offset value A oval, that formed valve body center line and sealing surface of valve plate central axis.The structure of this design not only has two way sealed reliable of double eccentric butterfly valve, also has the less characteristics of moment of torsion of three eccentric butterfly valve.
Described valve seat is the "O"-ring of PTFEH or modified ptfe or UHMWPE material parcel.
In sum, the beneficial effect that the utility model compared with prior art produces is: the utility model carries out little chamfering with two eccentric valve plates with special equipment, processing mode is simple, sealing effect is reliable, mechanical wear and the scratch of sealing surface of valve plate and sealing surface of seat have been reduced again, prolong the working life of valve, improved the reliability of valve.
Description of drawings
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is enlarged diagrams of sealing surface on the accompanying drawing 1;
Accompanying drawing 3 is enlarged diagrams of accompanying drawing 1 lower sealing surface.
Shown in the figure:
1, valve body, 1.1, the valve body center line, 2, valve seat, 3, eccentric shaft, 4, valve plate, 4.1, upper sealing surface, 4.2 lower sealing surface, 4.3, the sealing surface of valve plate central axis.
Embodiment
Be described in detail below below in conjunction with the embodiment of accompanying drawing to of the present utility model pair of eccentric flexible sealing butterfly valve.
A kind of pair of eccentric flexible sealing butterfly valve shown in accompanying drawing 1,2 and 3, comprise valve body 1, valve seat 2, eccentric shaft 3 and the valve plate 4 on eccentric shaft 3 of being coupling, the upper sealing surface 4.1 of described valve plate 4 and lower sealing surface 4.2 are ellipsoid, upper sealing surface 4.1 and lower sealing surface 4.2 formed sealing surface of valve plate central axis 4.3 and valve body center line 1.1 angulation A, described upper sealing surface 4.1 and lower sealing surface 4.2 all adopt the mode of soft seal to seal.
Described valve seat 2 is the "O"-ring of PTFEH or modified ptfe or UHMWPE material parcel.
In the present embodiment, structural representation during closing for two eccentric flexible sealing butterfly valves as shown in Figure 1, the axle center of eccentric shaft 3 is the gyration center of valve plate 4, this gyration center had both departed from the center of valve plate 4, the center of also departing from valve body 1, formed first eccentric and the second off-centre, sealing surface of valve plate central axis 4.3 and departing from of valve body center line 1.1 have formed the 3rd off-centre simultaneously; When the opening and closing valve, relative valve seat 2 sealing surfaces of valve plate 4 sealing surfaces have an effect that gradually goes out to break away from and be fade-in extruding, thereby mechanical wear and scratch when having reduced the opening and closing valve between valve plate 4 and the valve seat 2 have prolonged working life of valve, have improved the reliability of valve.
The utility model can pass through existing techniques in realizing without the technical characteristics of describing, and does not repeat them here.In the above-described embodiments, preferred forms of the present utility model is described, obviously, under inventive concept of the present utility model, still can make a lot of variations, for example the material of the sealing surface of described valve plate can adopt high temperature resistant, high voltage bearing material, realizes the effect of the high temperature high voltage resistant of butterfly valve.In essential scope of the present utility model, also can make a lot of variations, remodeling, interpolation or replacement.At this, should illustrate that any change of making all will fall in the protection domain of the present utility model under inventive concept of the present utility model.
Claims (2)
1. two eccentric flexible sealing butterfly valve, comprise valve body (1), valve seat (2), eccentric shaft (3) and the valve plate (4) on eccentric shaft (3) of being coupling, it is characterized in that: upper sealing surface (4.1) and/or the lower sealing surface (4.2) of described valve plate (4) have chamfering, have the several angle deviation between described valve body center line (1.1) and the sealing surface of valve plate central axis (4.3).
2. according to claim 1 pair of eccentric flexible sealing butterfly valve is characterized in that: described upper sealing surface (4.1) and/or lower sealing surface (4.2) are ellipsoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220612931 CN202901324U (en) | 2012-11-20 | 2012-11-20 | Double eccentric soft seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220612931 CN202901324U (en) | 2012-11-20 | 2012-11-20 | Double eccentric soft seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202901324U true CN202901324U (en) | 2013-04-24 |
Family
ID=48121995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220612931 Expired - Fee Related CN202901324U (en) | 2012-11-20 | 2012-11-20 | Double eccentric soft seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202901324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363130A (en) * | 2013-07-23 | 2013-10-23 | 扬中市好特阀业有限公司 | Eccentric butterfly valve |
-
2012
- 2012-11-20 CN CN 201220612931 patent/CN202901324U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363130A (en) * | 2013-07-23 | 2013-10-23 | 扬中市好特阀业有限公司 | Eccentric butterfly valve |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20131120 |