CN102062231A - Hard-soft double-layer sealing combined valve seat of corrugated pipe - Google Patents
Hard-soft double-layer sealing combined valve seat of corrugated pipe Download PDFInfo
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- CN102062231A CN102062231A CN 201010607739 CN201010607739A CN102062231A CN 102062231 A CN102062231 A CN 102062231A CN 201010607739 CN201010607739 CN 201010607739 CN 201010607739 A CN201010607739 A CN 201010607739A CN 102062231 A CN102062231 A CN 102062231A
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- valve seat
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- corrugated pipe
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Abstract
The invention relates to a sealing assembly of a valve, in particular to a hard-soft double-layer sealing combined valve seat of a corrugated pipe. The hard-soft double-layer sealing combined valve seat of the corrugated pipe is arranged between a valve cover and a valve core and comprises a corrugated pipe seat pad, a corrugated pipe seat, a hard valve seat, a spring, a corrugated pipe and a soft seal, wherein the hard valve seat and the soft seal are arranged close to the valve core, the corrugated pipe seat and the corrugated pipe seat pad are arranged among the hard valve seat, the soft seal and the valve cover, the spring is arranged on the excircle of the hard valve seat, i.e. between the hard valve seat and the corrugated pipe seat, and the corrugated pipe is arranged between the hard valve seat and the corrugated pipe seat and fixedly connected with the hard valve seat and the corrugated pipe seat. The hard-soft double-layer sealing combined valve seat is used to upgrade the sealing degree of the valve to ensure that the valve achieves zero leakage, ensures the sealing performance of the valve, prolongs the service life and eliminates inconvenience brought by the limitation of the mounting direction. All sealing parts in the hard-soft double-layer sealing combined valve seat are made of flexible graphite so that the valve can bear high temperature; and the valve has small start torque and long service life of the sealing surface.
Description
Technical field
The present invention relates to the black box of valve, refer in particular to the hard soft double-layer seal combined type valve seat of a kind of bellows.
Background technique
At present both at home and abroad high-temperature ball valve adopts is floating type spool, in order to guarantee the sealability of sealing surface, need to strengthen the pretightening force of valve seat and spool, thus the valve opening moment of torsion is big, valve sealing face quick abrasion, working life weak point.And its seal valve seat of Fixed ball valve adopts soft seal or hard sealing, can move again and seal between valve body by trace in order to guarantee valve seat, adopts at the valve seat external diameter and uses high temperature O type circle as the sealing between valve seat and valve body.And no matter be the narrow limitation which type of high temperature resistant O type circle is subjected to its material, maximum temperature must not surpass 300 ℃, even improve its resistance to extreme temperature by improvement, its cost will increase substantially, and causes valve to cost an arm and a leg.Simultaneously, O type circle along with the increase of service time, can produce problems such as aging, distortion under hot environment, reveals thereby cause valve seat and valve body spare to produce medium, and the valve seal performance can't guarantee.So the heatproof of fixed high-temperature ball valve is subjected to narrow limitation (being no more than 250 ℃).
Summary of the invention
The objective of the invention is to be improved and innovate at the shortcoming that exists in the background technique and problem, provide a kind of simple in structure, cost is low, adapt to various particular job environment, particularly contain solid particle, impurity, high temperature, high pressure, the hard soft double-layer seal combined type valve seat of the bellows of the demanding working environment of sealability.
Technological scheme of the present invention is a kind of black box valve seat that is applicable to various valves of structure, is arranged between valve gap and the spool, comprises bellows seat cushion, corrugated header, hard valve seat, spring, bellows and soft seal, wherein:
Hard valve seat and the setting of soft seal next-door neighbour spool, corrugated header and bellows seat cushion are arranged between hard valve seat, soft seal and the valve gap, spring be arranged on hard valve seat cylindrical, be between hard valve seat and the corrugated header;
Described bellows is arranged between hard valve seat and the corrugated header, and the three is fixed together.
Advantage of the present invention and beneficial effect:
1, makes valve density rating height, can reach zero leakage;
2, adopted the hard soft seal combined type valve seat of band bellows, solve valve seat hot environment lower valve base and should movably keep sealing problem with valve body again, promptly overcome the sealing of the former employing of Fixed ball valve O type circle and caused phenomenon poorly sealed even that valve seat is stuck under high temperature action because of O type circle is out of shape, overcome the shortcoming that floating type high-temperature ball valve valve opening moment of torsion is big, sealing surface wear is fast, working life is short again, guaranteed the valve seal performance.
3, spool and valve seat all are tungsten carbide material, have therefore prolonged working life, and switch is 200,000 times.
4, two way sealed mode, medium can be gone into from any one party surface current, has eliminated the inconvenience that the qualification because of installation direction brings.
5, all sealed members all adopt Expanded graphite, make valve can bear high temperature.
6, the valve opening moment of torsion is little, the sealing surface long service life.
Description of drawings
Fig. 1 is a mounting structure schematic representation of the present invention.
Embodiment
As shown in Figure 1, the present invention is the black box of valve, is arranged between valve gap 1 and the spool 11, comprises bellows seat cushion 2, corrugated header 3, hard valve seat 4, spring 5, bellows 6 and soft seal 7, wherein:
Described bellows 6 is arranged between hard valve seat 4 and the corrugated header 3, and the three is fixed together.
The hard soft double-layer seal combined type valve seat of bellows of the present invention is symmetricly set on the both sides of spool 11, and wherein hard valve seat 4 is i.e. first road sealing of hard sealing, and soft seal 7 is the sealing of second road.Described spool 11 is arranged in the cavity of valve body 8, opening-closing shaft passes the both sides that valve body 8 is arranged on spool 11, and spool 11, valve body 8, the band hard soft double-layer seal combined type valve seat of bellows and valve gap 1 are tightened to one by gland 12, cover 13, bottom 16 and bolt, nut.Described opening-closing shaft passes valve body 8 and is divided into supporting axle 14 and rotating shaft 10, wherein is provided with supporting sleeve 15 between supporting axle 14 and the valve body 8, is provided with rotating shaft cover 17 between rotating shaft 10 and the valve body 8, is provided with filler 9 between rotating shaft 10 and the cover 13.Described hard valve seat 4 is a tungsten carbide material.Described soft seal 7 is a metal-graphite material.
Structural principle of the present invention:
The present invention connects hard valve seat and corrugated header with bellows, it is fixed to make the high-temperature ball valve spool to be arranged to, adopt welding between bellows and hard valve seat, the corrugated header, thereby guaranteed the sealability between hard valve seat and valve pocket, the buoyancy effect of bellows has guaranteed the mobility of hard valve seat simultaneously, make hard valve seat under the pretightening force effect of planar spring, be close to spool, overcome that unsteady high-temperature ball valve opens that moment of torsion is big, valve sealing face quick abrasion, working life short shortcoming.
Two valve gaps and a valve body about valve body of the present invention is set to, the cavity of valve body is provided with the ball-type spool, about two valve gaps the hard soft seal combined type valve seat of a band bellows respectively is set, opening-closing shaft passes valve body and is arranged on the spool both sides.Bellows soft and hard seal combined type valve seat respectively is provided with one group in the spool both sides.The bellows of its setting couples together corrugated header and hard valve seat, has guaranteed that valve seat has guaranteed again movably that promptly valve seat and valve cover chamber do not have medium to reveal; The bellows seat cushion that is provided with has guaranteed that corrugated header and valve cover chamber medium do not reveal; The spring that is provided with plays hard valve seat is pressed on the spool, guarantees the sealability of valve seat and valve core chamber.The soft seal that is provided with is played the double seal effect with hard valve seat, and sealing material therefor firmly is Tungsten carbite, and the soft seal material therefor is a metallic graphite carbon, and the soft or hard combination has guaranteed the sealability of valve.
The present invention connects hard valve seat and corrugated header with bellows, has banned the high temperature O type circle in the valve base sealing fully.Solved because of valve base sealing produces aging under the high temperature media effect and distortion with O type circle, caused valve base sealing not sternly and valve seat is stuck can not move, thereby make hard soft valve seat can not be adjacent to spool, finally caused the not tight defective of valve seal.Adopt welding between bellows and hard soft valve seat, the corrugated header, a disposable solution sealing difficult problem; Simultaneously, the elasticity of bellows has guaranteed the mobility of hard soft valve seat, makes hard soft valve seat no matter how long to be close to spool under the active force of pretightening force, bellows elastic force and the medium of planar spring, has guaranteed the sealability of valve.
Embodiment of the present invention only is the description that preferred implementation of the present invention is carried out; be not that design of the present invention and scope are limited; under the prerequisite that does not break away from design philosophy of the present invention; engineers and technicians make technological scheme of the present invention in related domain various modification and improvement; all should fall into protection scope of the present invention; the technology contents that the present invention asks for protection all is documented in claims.
Claims (4)
1. hard soft double-layer seal combined type valve seat of bellows, the black box for valve is characterized in that:
It is arranged between valve gap (1) and the spool (11), comprises bellows seat cushion (2), corrugated header (3), hard valve seat (4), spring (5), bellows (6) and soft seal (7), wherein:
Hard valve seat (4) and soft seal (7) next-door neighbour's spool (11) are provided with, corrugated header (3) and bellows seat cushion (2) are arranged between hard valve seat (4), soft seal (7) and the valve gap (1), spring (5) be arranged on hard valve seat (4) cylindrical, be between hard valve seat (4) and the corrugated header (3);
Described bellows (6) is arranged between hard valve seat (4) and the corrugated header (3), and the three is fixed together.
2. the hard soft double-layer seal combined type valve seat of bellows according to claim 1 is characterized in that described valve seat is symmetricly set on the both sides of spool (11), and wherein hard valve seat (4) is i.e. first road sealing of hard sealing, and soft seal (7) is the sealing of second road.
3. the hard soft double-layer seal combined type valve seat of bellows according to claim 1 is characterized in that described hard valve seat (4) is a tungsten carbide material.
4. the hard soft double-layer seal combined type valve seat of bellows according to claim 1 is characterized in that described soft seal (7) is metal-graphite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010607739 CN102062231A (en) | 2010-12-28 | 2010-12-28 | Hard-soft double-layer sealing combined valve seat of corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010607739 CN102062231A (en) | 2010-12-28 | 2010-12-28 | Hard-soft double-layer sealing combined valve seat of corrugated pipe |
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| Publication Number | Publication Date |
|---|---|
| CN102062231A true CN102062231A (en) | 2011-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010607739 Pending CN102062231A (en) | 2010-12-28 | 2010-12-28 | Hard-soft double-layer sealing combined valve seat of corrugated pipe |
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| CN (1) | CN102062231A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807460A (en) * | 2012-11-08 | 2014-05-21 | 杭州艾诺流体控制仪表有限公司 | Expansion type seal-sealing ball valve |
| CN105805341A (en) * | 2016-05-30 | 2016-07-27 | 乌鲁木齐市闽之宇阀业有限公司 | Dual-material multi-protection sealing mechanism of ball valve |
| CN108980398A (en) * | 2018-09-20 | 2018-12-11 | 四川凯茨阀门制造有限公司 | A kind of compact-sized double-seal ball valve valve seat |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4143306A1 (en) * | 1991-03-27 | 1992-10-01 | Draxler Ernst Dipl Ing Fh | Seal for ball valve - has spring-loaded backing ring which allows adjustment to suit working conditions |
| CN2708056Y (en) * | 2004-05-19 | 2005-07-06 | 重庆川武仪表有限公司 | Eccentric hemispherical ball valve with floating valve seat |
| CN2731201Y (en) * | 2004-06-08 | 2005-10-05 | 铁岭阀门(集团)特种阀门有限责任公司 | Zero friction sealed valve |
| CN2738050Y (en) * | 2004-09-15 | 2005-11-02 | 王照业 | Corrugated pipe metal sealing ball valve |
| CN101368628A (en) * | 2008-10-15 | 2009-02-18 | 岳阳东方自控工程设备有限公司 | Combination sealing and fixing type ball valve |
| CN201934708U (en) * | 2010-12-28 | 2011-08-17 | 吴军 | Hard-soft double layer combined seal valve seat of corrugation pipe |
-
2010
- 2010-12-28 CN CN 201010607739 patent/CN102062231A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4143306A1 (en) * | 1991-03-27 | 1992-10-01 | Draxler Ernst Dipl Ing Fh | Seal for ball valve - has spring-loaded backing ring which allows adjustment to suit working conditions |
| CN2708056Y (en) * | 2004-05-19 | 2005-07-06 | 重庆川武仪表有限公司 | Eccentric hemispherical ball valve with floating valve seat |
| CN2731201Y (en) * | 2004-06-08 | 2005-10-05 | 铁岭阀门(集团)特种阀门有限责任公司 | Zero friction sealed valve |
| CN2738050Y (en) * | 2004-09-15 | 2005-11-02 | 王照业 | Corrugated pipe metal sealing ball valve |
| CN101368628A (en) * | 2008-10-15 | 2009-02-18 | 岳阳东方自控工程设备有限公司 | Combination sealing and fixing type ball valve |
| CN201934708U (en) * | 2010-12-28 | 2011-08-17 | 吴军 | Hard-soft double layer combined seal valve seat of corrugation pipe |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807460A (en) * | 2012-11-08 | 2014-05-21 | 杭州艾诺流体控制仪表有限公司 | Expansion type seal-sealing ball valve |
| CN105805341A (en) * | 2016-05-30 | 2016-07-27 | 乌鲁木齐市闽之宇阀业有限公司 | Dual-material multi-protection sealing mechanism of ball valve |
| CN105805341B (en) * | 2016-05-30 | 2019-04-26 | 乌鲁木齐市闽之宇阀业有限公司 | The double material multiple protective sealing mechanisms of ball valve |
| CN108980398A (en) * | 2018-09-20 | 2018-12-11 | 四川凯茨阀门制造有限公司 | A kind of compact-sized double-seal ball valve valve seat |
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Application publication date: 20110518 |