CN103486289A - Ball valve seat - Google Patents
Ball valve seat Download PDFInfo
- Publication number
- CN103486289A CN103486289A CN201310474934.4A CN201310474934A CN103486289A CN 103486289 A CN103486289 A CN 103486289A CN 201310474934 A CN201310474934 A CN 201310474934A CN 103486289 A CN103486289 A CN 103486289A
- Authority
- CN
- China
- Prior art keywords
- sealing
- plane
- seal groove
- valve seat
- sealing piece
- 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.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/205—Sealing effected by the flowing medium
Abstract
The invention discloses a ball valve seat which comprises an annular valve seat body, a first sealing piece and a second sealing piece. A first sealing groove and a second sealing groove are distributed in the inclined dace of the inner wall of the vale seat body in an annular mode. The section of the first sealing piece is in the shape of a circular-angle triangle. The first sealing piece is embedded in the first sealing groove. A circular-angle included angle formed by the right face and the bottom face of the first sealing piece protrudes relative to the inclined face of the inner wall of the valve seat body. The section of the second sealing piece is in the shape of a right-angle trapezoid. The right angle end of the second sealing piece is embedded in the second sealing groove. When the first sealing piece is pressed, the protruding circular-angle sealing face is pressed to deform so as to generate bouncing force and be closely attached to a ball body, so that sealing between the first sealing piece, the ball body and the valve seat is formed. Inclined edges of the second sealing piece are distributed, in the same plane, relative to the inclined face of the inner wall of the valve seat to form a sealing face. The second sealing piece mainly plays roles in supporting the first sealing piece, relieving pressure received by the first sealing piece, and preventing the surface of the first sealing piece from fracturing.
Description
Technical field
Present technique relates to a kind of ball seat, is applicable on the combined type ball valve.
Background technique
Ball valve, for blocking or connect the medium of pipeline, is used in hydraulic tubing or fluid-transporting tubing usually, because of its opening and closing rapidly easy, flexibility be widely used in oil, chemical industry by force, control in the industry such as golden.
The sealing principle of ball valve be mainly by: valve inner arranges a circular spheroid, valve when opening state, the through hole in the middle of ball and the import and export conducting at valve gap two ends, formation pipeline.While closing, only need drive the spheroid half-twist by valve rod, make both center lines orthogonal, utilize the sphere of spheroid that pipeline is sealed.For preventing that valve internal from revealing, the valve component sealing configuration between valve gap and valve seat mainly is set, form sealing between valve seat and spheroid and the sealing between valve seat and valve gap by ring assembly.Sealing between valve seat and spheroid is most important, but easily occur being gnawed bad phenomenon in the valve seat assembling, due to rigidity friction long-term between spheroid and valve seat, make its surface pit occur, cause the sealing between spheroid and valve seat to go wrong, affect normal use and the performance of ball valve.
technology contents
For overcoming the deficiencies in the prior art, present technique provides a kind of ball seat good with the ball valve sealing performance.
The technological scheme that present technique is taked for this reason is: a kind of ball seat, comprise annular valve seat body, the first Sealing and the second Sealing, and on the inwall inclined-plane of valve seat body, annular is distributed with the first seal groove and the second seal groove; Described the first seal groove forms by facing directly with inclined-plane, and the second seal groove cross section is rectangular; The first seal groove face directly and inclined-plane between form the drift angle of fillet; The inclined-plane of the first seal groove and the second seal groove outer side wall form fillet, and are positioned at the outside, inwall inclined-plane of valve seat body; Described the first Sealing cross section is the triangle that three angles are fillet, be inlaid in the first seal groove, the first Sealing face the laminating of facing directly with the first seal groove directly, the laminating of the inclined-plane of the inclined-plane of the first Sealing and the first seal groove, the first Sealing face directly and the drift angle of fillet that inclined-plane forms and the first seal groove between leave the first space; The fillet that face directly and the bottom surface of the first Sealing forms inwardly protrudes from the inwall inclined-plane of valve seat body; The second Sealing cross section is at right angles trapezoidal, and its right angle end is inlaid in the second seal groove, the long end face laminating of the bottom surface of the first Sealing and the second Sealing; Leave Second gap between the fillet that the fillet that the inclined-plane of the first Sealing and bottom surface form and the inclined-plane of the first seal groove and the second seal groove outer side wall form.
As the preferred technological scheme of present technique, the inwall inclined-plane of the inclined-plane of the second Sealing and valve seat body is positioned at same plane.
As the preferred technological scheme of present technique, described the first Sealing is rubber seal, and the second Sealing is teflon seal.
As the preferred technological scheme of present technique, described the second Sealing is for adding the teflon seal of graphite.
Present technique is provided with the first seal groove and the second seal groove on the inwall inclined-plane of valve seat body, and the first Sealing and the second Sealing are inlaid in respectively in the first seal groove and the second seal groove, forms sealing surface.The fillet that the facing directly of the first Sealing forms with the inclined-plane of the first Sealing protrudes because of the inwall inclined-plane of its relative valve seat body, so main sealing surface as valve, when ball valve is closed, under the extruding of the gas of ball in valve or liquid with the first Sealing close contact, the first Sealing is when being under pressure, the fillet sealing surface compressive deformation protruded and produce rebounding force and fit tightly with spheroid, form the sealing between the first Sealing and spheroid and valve seat.The second Sealing hypotenuse is the same plane distribution with respect to the valve base inner wall inclined-plane and forms sealing surface, mainly the first Sealing is played a supporting role, and alleviates the pressure that the first Sealing is subject to, and prevents that fracture from appearring in the first seal surface; Leave the first space and Second gap between described the first Sealing and the first seal groove, when spheroid constantly increases the pressure of the first Sealing, the first Sealing produces lateral deformation, thereby the areolate volume that contracts, the existence in two spaces, make the both sides of the first Sealing can produce deformation, effectively alleviated the pressure that the first Sealing is subject to, increase the service life, strengthened sealing effect.
In technique scheme, described combination seal, the first Sealing is rubber seal, the second Sealing is for adding the teflon seal of graphite.With common valve, utilize between spheroid and valve seat rigidity to contact to form in valve and seal and compare, utilize the high advantage of the first Sealing rubber elasticity, produce elastic force while making the first Sealing compressive deformation, be easier to the sealing between valve seat and spheroid, realize zero leakage in valve.With independent first Sealing that uses, compare, use the second Sealing to form combination seal, utilize the ptfe surface friction coefficient to hang down and the high advantage of graphite hardness, prevent the first Sealing fracture, alleviate the pressure of the first Sealing, reach and extend the valve sealing element effect in working life, it is optimum that the valve overall sealing performance reaches.
The accompanying drawing explanation
The structural representation of the ball seat that Fig. 1 is present technique.
The enlarged diagram when A that Fig. 2 is Fig. 1 partly is unkitted the first Sealing and the second Sealing.
The enlarged diagram when A that Fig. 3 is Fig. 1 partly is equipped with the first Sealing and the second Sealing.
Below in conjunction with accompanying drawing, the embodiment of present technique is done further and illustrated.
Embodiment
This ball seat, comprise annular valve seat body 1, the first Sealing 5 and the second Sealing 6, on the inwall inclined-plane of valve seat body, annular is distributed with the first seal groove 2 and the second seal groove 3, described the first seal groove 2 forms with inclined-plane 22 by facing 21 directly, the first seal groove face directly 21 and inclined-plane 22 between the drift angle that forms be fillet, the second seal groove 3 cross sections are rectangular, the angle 7 that the inclined-plane 22 of the first seal groove and the second seal groove 3 outer side walls form is fillet, and its summit is positioned at the outside, inwall inclined-plane of valve seat body lower than the inwall inclined-plane 4(of valve seat body), described the first Sealing 5 cross sections are the fillet triangle, be inlaid in the first seal groove 2, the first Sealing face 21 laminatings of facing directly with the first seal groove directly, inclined-plane 22 laminatings of the inclined-plane of the first Sealing and the first seal groove, the first Sealing face directly and the drift angle of fillet angle that inclined-plane forms and the first seal groove between leave the first space 8, leave Second gap 9 between the angle that the fillet angle that the inclined-plane of the first Sealing and bottom surface form and the inclined-plane of the first seal groove and the second seal groove outer side wall form, the fillet angle 51 that face directly and the bottom surface of the first Sealing forms with respect to the inwall inclined-plane 4 of valve seat body to projecting inward, the second Sealing 6 cross sections are at right angles trapezoidal, and its right angle end is inlaid in the second seal groove 3, and the long end face of the bottom surface of the first Sealing 5 and the second Sealing 6 fits tightly, and the inclined-plane 61 of the second Sealing is positioned at same plane with the inwall inclined-plane 4 of valve seat body.Wherein the first Sealing 5 is rubber seal, and the second Sealing 6 is teflon seal.
During use, under the extruding of the gas of spheroid in valve or liquid with rubber seal 5 close contacts, rubber seal 5 is out of shape and produces rebounding force and fit tightly with spheroid when being under pressure, sealing between formation and spheroid and ball seat, when the spheroid pressure constantly increases, rubber seal 5 produces lateral deformation, thereby dwindle the volume of the first space 8 and Second gap 9, effectively alleviated the pressure that rubber seal 5 is subject to, and teflon seal 6 has effectively transmitted pressure, prevent that rubber seal 5 surfaces from slight crack occurring and losing efficacy, can effectively extend valve working life, strengthen the sealability of valve seat under different temperatures pressure when not increasing torsion.
Claims (4)
1. ball seat, comprise annular valve seat body, the first Sealing and the second Sealing, and on the inwall inclined-plane of valve seat body, annular is distributed with the first seal groove and the second seal groove; Described the first seal groove forms by facing directly with inclined-plane, and the second seal groove cross section is rectangular; The first seal groove face directly and inclined-plane between form the drift angle of fillet; The inclined-plane of the first seal groove and the second seal groove outer side wall form fillet, and are positioned at the outside, inwall inclined-plane of valve seat body; Described the first Sealing cross section is the triangle that three angles are fillet, be inlaid in the first seal groove, the first Sealing face the laminating of facing directly with the first seal groove directly, the laminating of the inclined-plane of the inclined-plane of the first Sealing and the first seal groove, the first Sealing face directly and the drift angle of fillet that inclined-plane forms and the first seal groove between leave the first space; The fillet that face directly and the bottom surface of the first Sealing forms inwardly protrudes from the inwall inclined-plane of valve seat body; The second Sealing cross section is at right angles trapezoidal, and its right angle end is inlaid in the second seal groove, the long end face laminating of the bottom surface of the first Sealing and the second Sealing; Leave Second gap between the fillet that the fillet that the inclined-plane of the first Sealing and bottom surface form and the inclined-plane of the first seal groove and the second seal groove outer side wall form.
2. ball seat according to claim 1, it is characterized in that: the inwall inclined-plane of the inclined-plane of the second Sealing and valve seat body is positioned at same plane.
3. ball seat according to claim 1 and 2, it is characterized in that: described the first Sealing is rubber seal, the second Sealing is teflon seal.
4. ball seat according to claim 3, is characterized in that: the teflon seal that described the second Sealing is interpolation graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310474934.4A CN103486289A (en) | 2013-10-12 | 2013-10-12 | Ball valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310474934.4A CN103486289A (en) | 2013-10-12 | 2013-10-12 | Ball valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103486289A true CN103486289A (en) | 2014-01-01 |
Family
ID=49826763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310474934.4A Pending CN103486289A (en) | 2013-10-12 | 2013-10-12 | Ball valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103486289A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728466A (en) * | 2015-02-01 | 2015-06-24 | 江苏诚功阀门科技有限公司 | High-performance non-leakage ball valve for natural gas transmission |
| CN106015602A (en) * | 2016-05-30 | 2016-10-12 | 沈阳大学 | Sealing ring for ore pulp check valve |
| WO2017084418A1 (en) * | 2015-11-19 | 2017-05-26 | 舍弗勒技术股份两合公司 | Ball valve and sealing element for ball valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131083A (en) * | 1995-03-11 | 1996-09-18 | 张洪法 | Regenerated polytetrafluoroethylene products and producing method thereof |
| US20050072953A1 (en) * | 2003-10-06 | 2005-04-07 | Caprera Brian J. | Low torque ball valve seat |
| CN101108959A (en) * | 2007-07-03 | 2008-01-23 | 陈秉杞 | Polytetrafluoroethylene reactivating material high and low temperature resistant sealing member |
| CN102734488A (en) * | 2012-07-09 | 2012-10-17 | 张业宝 | Ball valve base |
| CN202674367U (en) * | 2012-07-20 | 2013-01-16 | 张业宝 | Valve seat for spring protection ball valve |
| CN202733040U (en) * | 2012-04-19 | 2013-02-13 | 吴江恒宇精密模具有限公司 | Three-sealing ball valve seat |
| CN102924853A (en) * | 2012-09-17 | 2013-02-13 | 株洲海天工程塑料实业有限公司 | Polytetrafluoroethylene composite material and preparation method thereof |
| CN203500553U (en) * | 2013-10-12 | 2014-03-26 | 南京肯特复合材料有限公司 | Valve seat of ball valve |
-
2013
- 2013-10-12 CN CN201310474934.4A patent/CN103486289A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131083A (en) * | 1995-03-11 | 1996-09-18 | 张洪法 | Regenerated polytetrafluoroethylene products and producing method thereof |
| US20050072953A1 (en) * | 2003-10-06 | 2005-04-07 | Caprera Brian J. | Low torque ball valve seat |
| CN101108959A (en) * | 2007-07-03 | 2008-01-23 | 陈秉杞 | Polytetrafluoroethylene reactivating material high and low temperature resistant sealing member |
| CN202733040U (en) * | 2012-04-19 | 2013-02-13 | 吴江恒宇精密模具有限公司 | Three-sealing ball valve seat |
| CN102734488A (en) * | 2012-07-09 | 2012-10-17 | 张业宝 | Ball valve base |
| CN202674367U (en) * | 2012-07-20 | 2013-01-16 | 张业宝 | Valve seat for spring protection ball valve |
| CN102924853A (en) * | 2012-09-17 | 2013-02-13 | 株洲海天工程塑料实业有限公司 | Polytetrafluoroethylene composite material and preparation method thereof |
| CN203500553U (en) * | 2013-10-12 | 2014-03-26 | 南京肯特复合材料有限公司 | Valve seat of ball valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728466A (en) * | 2015-02-01 | 2015-06-24 | 江苏诚功阀门科技有限公司 | High-performance non-leakage ball valve for natural gas transmission |
| WO2017084418A1 (en) * | 2015-11-19 | 2017-05-26 | 舍弗勒技术股份两合公司 | Ball valve and sealing element for ball valve |
| CN106015602A (en) * | 2016-05-30 | 2016-10-12 | 沈阳大学 | Sealing ring for ore pulp check valve |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20140101 |