CN201687982U - Hard and soft dual seal fixed ball valve - Google Patents
Hard and soft dual seal fixed ball valve Download PDFInfo
- Publication number
- CN201687982U CN201687982U CN2010202210868U CN201020221086U CN201687982U CN 201687982 U CN201687982 U CN 201687982U CN 2010202210868 U CN2010202210868 U CN 2010202210868U CN 201020221086 U CN201020221086 U CN 201020221086U CN 201687982 U CN201687982 U CN 201687982U
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- valve
- hard
- valve seat
- sealing
- soft
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Abstract
The utility model discloses a hard and soft dual seal fixed ball valve, including a valve body, a valve seat and a ball valve core, wherein the valve seat is fixed between the stream road port of the valve body and the ball valve core, the valve body, the valve seat and the ball valve core are all metal material, the valve seat has a hard sealing face, the shape of the hard sealing face is identical to the crown face of the ball valve core corresponding to the hard sealing face, the hard sealing face is contacted to the ball valve core to constitute a primary hard sealing, a first O-ring in rubber material is fixed on the valve seat, the first O-ring is contacted to the ball valve core to constitute a secondary soft sealing, the primary hard sealing and the secondary soft sealing are adopted to combine a hard and soft dual seal combined sealing structure, so that the sealing property of the ball valve will be more reliable, to fundamentally achieve the 'zero leakage' sealing requirements, the external surface of the rubber material first O-ring has a polytetrafluorethylene layer, which not only ensures the flexibility and toughness of the sealing surface, but also decreases the friction, improves the wearing capacity, so that the switching use time of the ball valve is improved to more than ten times.
Description
Technical field
The utility model relates to a kind of ball-valve structure, specifically relates to a kind of fixing ball valve that improves sealing configuration.
Background technique
Ball valve mainly is by a porose spheroid, does 90 ° of rotations under the control of valve rod, makes valve opening or closes, because its channel diameter is equal to or less than internal diameter of the pipeline, fluid resistance is little, and switch rapidly, conveniently, life-span is long, reliability is high, has obtained using widely.
The seal form of existing ball valve roughly is divided into soft seal and seals two kinds firmly.
The characteristics of soft sealing ball valve are: under pretightening force or fluid pressure action, seat material mostly is special plastics, as making to satisfy serviceability temperature and pressure by relative plastic materialss harder and that rigidity is bigger such as PEEK (polyether-ether-ketone), PTFE (poly-tetrafluoro hexene), nylon, utilize its intrinsic elastic characteristic and spheroid to compress, and make seat material produce the resilient plastic distortion and reach sealing, its sealing effect depends on valve seat under the effect of hydrodynamic pressure or pretightening force, can compensate the out of roundness of spheroid and the degree of surface microscopic injustice.In addition, after the ball valve assembling and setting was good, the pretightening force on the sealing surface was just fixing.The shortcoming of soft sealing ball valve mainly is: but after ball valve uses a period of time, because the wearing and tearing of valve seat, and plasticity residual deformation, the valve seat that fits tightly and spheroid will be gradually loose, seal pressure also will reduce gradually and seepage will take place, be subjected to the restriction of seat material heatproof, above-mentioned ball valve generally only is used for lower pressure (about 1.6Mpa) and lower temperature (below 200 °) work down.
The characteristics of hard seal ball valve are: valve body, spheroid and valve seat all are to use the metallic material manufacturing, and valve seat is metal or heat resisting alloy.Seat material adopts the advantage of metal to metal seal pair to be: the Applicable temperature scope is wide, and the thermal expansion coefficient of various metallic material is more or less the same, as long as select for use properly, can reach basically identical, helps coordinating temperature deformation; Shortcoming is: the metal material hardness height, the specific pressure that reaches sealing is also high, in the lower occasion of pressure, be difficult to reach the effect of sealing by the pressure of fluid, even if adopt pretightening force to reach sealing, but because of seal pressure is bigger, the keying torque of ball valve is also big, the wearing and tearing of sealing pair are fast more, and the working life of valve is not high.Because the factor that switching torque increases, by manual operation is the thing of comparison difficulty, adopt gear-boxes, electronic or pneumatic valve actuator to drive the keying of valve so hard seal ball valve is much more general, the meeting that valve actuator has is more high than valve price, not every application all needs this equipment, and sometimes increasing these devices is unavoidable things.
In addition, ball valve does not make us the adjustability felt quite pleased so far, therefore, when valve seat begins to leak owing to excessive wear, just must change or keep in repair this valve.
The model utility content
In order to overcome above-mentioned defective, the utility model provides a kind of soft or hard double-sealing fixing ball valve, the soft or hard double-sealing combined sealing structure that this soft or hard double-sealing fixing ball valve has adopted elementary hard sealing and secondary soft seal to combine, make that the sealability of ball valve is more reliable, reach the seal request of " zero leakage " substantially.
The utility model for the technological scheme that solves its technical problem and adopt is:
A kind of soft or hard double-sealing fixing ball valve, comprise valve body, valve seat and spherical valve core, described valve seat is fixed between the runner mouth and spherical valve core of valve body, described valve body, valve seat and spherical valve core are all metal material, described valve seat has hard sealing surface, described hard sealing surface be on the valve seat with contacted of spherical valve core, the shape of described hard sealing surface is consistent with the arc surface of its pairing spherical valve core, described hard sealing surface contacts with spherical valve core and constitutes elementary hard sealing, be fixed with the O shape circle of rubber material on the described valve seat, described O shape circle contacts with described spherical valve core and constitutes secondary soft seal.
The soft or hard double-sealing combined sealing structure that valve seat and the sealing between spherical valve core have adopted elementary hard sealing and secondary soft seal to combine, elementary hard sealing can prevent the damage of solid particle to sealing surface effectively, and secondary soft seal can guarantee that valve reaches the seal request of " zero leakage ".Soft or hard double-sealing combined sealing structure has the plurality of advantages of existing soft seal and hard sealing, because valve seat has the protection of elementary hard sealing, under any circumstance can not cause serious extrusion-deformation between the sealing surface to the O shape circle of secondary soft seal, so not only solved the wear problem of traditional soft seal valve seat, also to part because the condition that can be compensated the gap has been created in the leakage in valve that the prooving of valve seat or boost pressure cause; Because valve seat has auxiliary secondary soft seal, therefore the seal pressure that needs is littler than the seal pressure that traditional single hard sealed valve needs, and the operation moment of torsion of valve has also reduced many like this.
Further technological scheme of the present utility model is:
Described O shape circle is positioned at the periphery of described hard sealing surface.
Described O shape circle outer surface has polytetrafluoroethylene floor.1949, K.V Su Te and P.H Thomas confirmed when measuring the friction factor of polytetrafluoroethylene (PTFE) material on the B-L machine: carry 1～4 kilogram, during 0.1～10 millimeter of sliding speed, the friction factor of polytetrafluoroethylene (PTFE) material is 0.04; Under 1360 kilograms of situations of carrying, friction factor reaches 0.01.At present fluorine rubber (friction factor is 0.8) and the nylon (friction factor is 0.3～0.4) that adopts all has very big friction factor, and is well known that, the easy more wearing and tearing of the material that friction factor is big more directly influence working life of ball valve.Therefore not only guaranteed the elasticity and the toughness of sealing surface at the O shape circle outer surface spraying polytetrafluoroethylene (PTFE) of rubber material, also reduced friction, improved wear resistance, the switching access times of ball valve are brought up to more than ten times.
The structure that is fixed with the O shape circle of rubber material on the described valve seat is: the outer rim of described valve seat offers a loop groove, described O shape circle is embedded in the described annular recess, be provided with trim ring and some screws, described O shape circle side margin pushed down by described trim ring so that O shape delineation is arranged in described annular recess, and described some screws are fixed in trim ring on the described valve seat.
Offer accepting groove near on the valve body of described valve seat, be placed with the rubber-like elastic component in the described accepting groove, described elastic component and described accepting groove are complementary, described elastic component one end elasticity compresses described valve body, described elastic component the other end elasticity compresses described valve seat, described elastic component is in confined state, and described elastic component provides the elastic force that valve seat is compressed to spherical valve core.
Be provided with the seal ring that is used for valve body and valve seat isolation, described seal ring is positioned at valve body and valve base chamber.
Be provided with and be used for the 2nd O shape circle that valve body and valve seat are isolated, described the 2nd O shape circle is positioned at valve body and valve base chamber, and described the 2nd O shape circle is parallel with described seal ring side by side, and the 2nd O shape is enclosed and described seal ring between have distance.
Seal ring and the 2nd O shape circle all are used for isolation valve body and valve seat, because seal ring is different with the material of the 2nd O shape circle, therefore to the ability to bear difference of temperature and pressure, adopt seal ring and the 2nd O shape circle to isolate simultaneously, can play better seal isolation effect at valve body and valve base chamber.
Offer oil hole on the valve seat between described seal ring and the 2nd O shape circle, described oil hole communicates with described spherical valve core.Oil hole is used to inject lubricant grease, and the lubricant grease of injection makes and forms oil film on the sealing surface, has not only played the effect of reducing friction, reducing wear and reducing moment of torsion, has also played certain seal action.
The beneficial effects of the utility model are: soft or hard double-sealing fixing ball valve of the present utility model, its valve seat has hard sealing surface, hard sealing surface be on the valve seat with contacted of spherical valve core, the shape of hard sealing surface is consistent with the arc surface of its pairing spherical valve core, hard sealing surface contacts with spherical valve core and constitutes elementary hard sealing, be fixed with the O shape circle of rubber material on the valve seat, described O shape circle contacts with described spherical valve core and constitutes secondary soft seal, the soft or hard double-sealing combined sealing structure that this soft or hard double-sealing fixing ball valve has adopted elementary hard sealing and secondary soft seal to combine, elementary hard sealing can prevent the damage of solid particle to sealing surface effectively, and secondary soft seal can guarantee that valve reaches the seal request of " zero leakage "; Because valve seat has the protection of elementary hard sealing, under any circumstance can not cause serious extrusion-deformation between the sealing surface to the O shape circle of secondary soft seal, so not only solved the wear problem of traditional soft seal valve seat, also to part because the condition that can be compensated the gap has been created in the leakage in valve that the prooving of valve seat or boost pressure cause; Because valve seat has auxiliary secondary soft seal, therefore the seal pressure that needs is littler than the seal pressure that traditional single hard sealed valve needs, and the operation moment of torsion of valve has also reduced many like this; Because an O shape of rubber material circle outer surface has polytetrafluoroethylene floor, has not only guaranteed the elasticity and the toughness of sealing surface, has also reduced friction, has improved wear resistance, and the switching access times of ball valve are brought up to more than ten times.
Description of drawings
Fig. 1 partly cuts open figure for soft or hard double-sealing fixing ball valve described in the utility model;
Fig. 2 is a valve seat partial enlarged drawing described in the utility model.
Embodiment
Embodiment: a kind of soft or hard double-sealing fixing ball valve, comprise valve body 1, valve seat 2 and spherical valve core 3, described valve seat is fixed between the runner mouth and spherical valve core of valve body, described valve body, valve seat and spherical valve core are all metal material, described valve seat has hard sealing surface 4, described hard sealing surface be on the valve seat with contacted of spherical valve core, the shape of described hard sealing surface is consistent with the arc surface of its pairing spherical valve core, described hard sealing surface contacts with spherical valve core and constitutes elementary hard sealing, be fixed with the O shape circle 5 of rubber material on the described valve seat, described O shape circle contacts with described spherical valve core and constitutes secondary soft seal.
The soft or hard double-sealing combined sealing structure that valve seat and the sealing between spherical valve core have adopted elementary hard sealing and secondary soft seal to combine, elementary hard sealing can prevent the damage of solid particle to sealing surface effectively, and secondary soft seal can guarantee that valve reaches the seal request of " zero leakage ".Soft or hard double-sealing combined sealing structure has the plurality of advantages of existing soft seal and hard sealing, because valve seat has the protection of elementary hard sealing, under any circumstance can not cause serious extrusion-deformation between the sealing surface to the O shape circle of secondary soft seal, so not only solved the wear problem of traditional soft seal valve seat, also to part because the condition that can be compensated the gap has been created in the leakage in valve that the prooving of valve seat or boost pressure cause; Because valve seat has auxiliary secondary soft seal, therefore the seal pressure that needs is littler than the seal pressure that traditional single hard sealed valve needs, and the operation moment of torsion of valve has also reduced many like this.
Described O shape circle is positioned at the periphery of described hard sealing surface.
Described O shape circle outer surface has polytetrafluoroethylene floor.1949, K.V Su Te and P.H Thomas confirmed when measuring the friction factor of polytetrafluoroethylene (PTFE) material on the B-L machine: carry 1～4 kilogram, during 0.1～10 millimeter of sliding speed, the friction factor of polytetrafluoroethylene (PTFE) material is 0.04; Under 1360 kilograms of situations of carrying, friction factor reaches 0.01.At present fluorine rubber (friction factor is 0.8) and the nylon (friction factor is 0.3～0.4) that adopts all has very big friction factor, and is well known that, the easy more wearing and tearing of the material that friction factor is big more directly influence working life of ball valve.Therefore not only guaranteed the elasticity and the toughness of sealing surface at the O shape circle outer surface spraying polytetrafluoroethylene (PTFE) of rubber material, also reduced friction, improved wear resistance, the switching access times of ball valve are brought up to more than ten times.
The structure that is fixed with the O shape circle of rubber material on the described valve seat is: the outer rim of described valve seat offers a loop groove, described annular recess is that the cross section is the annular ditch groove of V-arrangement, described O shape circle is embedded in the described annular recess, be provided with trim ring 6 and some screws 7, described screw is a sunk screw, described O shape circle side margin pushed down by described trim ring so that O shape delineation is arranged in described annular recess, and described some screws are fixed in trim ring on the described valve seat.
Offer accepting groove near on the valve body of described valve seat, be placed with rubber-like elastic component 8 in the described accepting groove, described elastic component is a spring, described elastic component and described accepting groove are complementary, described elastic component one end elasticity compresses described valve body, described elastic component the other end elasticity compresses described valve seat, and described elastic component is in confined state, and described elastic component provides the elastic force that valve seat is compressed to spherical valve core.
Be provided with the seal ring 9 that is used for valve body and valve seat isolation, the material of sealing circle is a graphite, and described seal ring is positioned at valve body and valve base chamber.
Be provided with the 2nd O shape circle 10 that is used for valve body and valve seat isolation, the material of the 2nd O shape circle is a rubber, described the 2nd O shape circle is positioned at valve body and valve base chamber, and described the 2nd O shape circle is parallel with described seal ring side by side, and has distance between the 2nd O shape circle and described seal ring.
Seal ring and the 2nd O shape circle all are used for isolation valve body and valve seat, because seal ring is different with the material of the 2nd O shape circle, therefore to the ability to bear difference of temperature and pressure, adopt seal ring and the 2nd O shape circle to isolate simultaneously, can play better seal isolation effect at valve body and valve base chamber.
Offer oil hole 11 on the valve seat between described seal ring and the 2nd O shape circle, described oil hole communicates with described spherical valve core.Oil hole is used to inject lubricant grease, and the lubricant grease of injection makes and forms oil film on the sealing surface, has not only played the effect of reducing friction, reducing wear and reducing moment of torsion, has also played certain seal action.
Claims (8)
1. soft or hard double-sealing fixing ball valve, comprise valve body (1), valve seat (2) and spherical valve core (3), described valve seat is fixed between the runner mouth and spherical valve core of valve body, it is characterized in that: described valve body, valve seat and spherical valve core are all metal material, described valve seat has hard sealing surface (4), described hard sealing surface be on the valve seat with contacted of spherical valve core, the shape of described hard sealing surface is consistent with the arc surface of its pairing spherical valve core, described hard sealing surface contacts with spherical valve core and constitutes elementary hard sealing, be fixed with the O shape circle (5) of rubber material on the described valve seat, described O shape circle contacts with described spherical valve core and constitutes secondary soft seal.
2. soft or hard double-sealing fixing ball valve according to claim 1 is characterized in that: described O shape circle is positioned at the periphery of described hard sealing surface.
3. soft or hard double-sealing fixing ball valve according to claim 1 is characterized in that: described O shape circle outer surface has polytetrafluoroethylene floor.
4. soft or hard double-sealing fixing ball valve according to claim 1, it is characterized in that: the structure that is fixed with the O shape circle of rubber material on the described valve seat is: the outer rim of described valve seat offers a loop groove, described O shape circle is embedded in the described annular recess, be provided with trim ring (6) and some screws (7), described O shape circle side margin pushed down by described trim ring so that O shape delineation is arranged in described annular recess, and described some screws are fixed in trim ring on the described valve seat.
5. soft or hard double-sealing fixing ball valve according to claim 1, it is characterized in that: offer accepting groove near on the valve body of described valve seat, be placed with rubber-like elastic component (8) in the described accepting groove, described elastic component and described accepting groove are complementary, described elastic component one end elasticity compresses described valve body, described elastic component the other end elasticity compresses described valve seat, and described elastic component is in confined state, and described elastic component provides the elastic force that valve seat is compressed to spherical valve core.
6. soft or hard double-sealing fixing ball valve according to claim 1 is characterized in that: be provided with the seal ring (9) that is used for valve body and valve seat isolation, described seal ring is positioned at valve body and valve base chamber.
7. soft or hard double-sealing fixing ball valve according to claim 6, it is characterized in that: be provided with the 2nd O shape circle (10) that is used for valve body and valve seat isolation, described the 2nd O shape circle is positioned at valve body and valve base chamber, described the 2nd O shape circle is parallel with described seal ring side by side, and has distance between the 2nd O shape circle and described seal ring.
8. soft or hard double-sealing fixing ball valve according to claim 7 is characterized in that: offer oil hole (11) on the valve seat between described seal ring and the 2nd O shape circle, described oil hole communicates with described spherical valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202210868U CN201687982U (en) | 2010-06-10 | 2010-06-10 | Hard and soft dual seal fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202210868U CN201687982U (en) | 2010-06-10 | 2010-06-10 | Hard and soft dual seal fixed ball valve |
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| Publication Number | Publication Date |
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| CN201687982U true CN201687982U (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202210868U Expired - Fee Related CN201687982U (en) | 2010-06-10 | 2010-06-10 | Hard and soft dual seal fixed ball valve |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269279A (en) * | 2011-07-20 | 2011-12-07 | 伯特利阀门集团有限公司 | Cast stone ball valve with combined seal |
| CN102278491A (en) * | 2010-06-10 | 2011-12-14 | 沃泰阀门(昆山)有限公司 | Soft and hard dual-seal fixed ball valve |
| CN102620006A (en) * | 2012-04-24 | 2012-08-01 | 邬官江 | Low-torque temperature-resistant ball valve |
| CN102678538A (en) * | 2012-06-12 | 2012-09-19 | 许尚志 | Soft sealing mechanism of manual hydraulic pump |
| CN102878316A (en) * | 2012-10-23 | 2013-01-16 | 浙江超达阀门股份有限公司 | Ball valve reliable in sealing and low in opening-closing torque |
| CN102878320A (en) * | 2012-09-29 | 2013-01-16 | 凯瑞特阀业有限公司 | Ball valve with a valve seat having functions of auto-cleaning and dust proofing |
| CN102878317A (en) * | 2012-10-23 | 2013-01-16 | 浙江超达阀门股份有限公司 | Pneumatic ball valve reliable in sealing and low in opening-closing torque |
| CN103906955A (en) * | 2011-10-25 | 2014-07-02 | 道达尔公司 | Isolating valve |
| CN107795704A (en) * | 2016-08-31 | 2018-03-13 | 费海鸿 | Ultrahigh vacuum ball valve |
| CN108286615A (en) * | 2017-01-09 | 2018-07-17 | 凯泰阀门(集团)有限公司 | Compound sealing structure for ball valve |
| CN110043683A (en) * | 2018-01-16 | 2019-07-23 | 深圳市飞托克实业有限公司 | Valve |
| CN114352728A (en) * | 2020-10-12 | 2022-04-15 | 浙江盾安人工环境股份有限公司 | Flow regulating valve |
| CN114542748A (en) * | 2022-02-22 | 2022-05-27 | 浙江旭腾阀门有限公司 | Soft and hard sealing ball valve |
| CN114877074A (en) * | 2022-05-06 | 2022-08-09 | 宁波天擎航天科技有限公司 | Novel spherical sealing structure for rocket engine |
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2010
- 2010-06-10 CN CN2010202210868U patent/CN201687982U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278491A (en) * | 2010-06-10 | 2011-12-14 | 沃泰阀门(昆山)有限公司 | Soft and hard dual-seal fixed ball valve |
| CN102269279A (en) * | 2011-07-20 | 2011-12-07 | 伯特利阀门集团有限公司 | Cast stone ball valve with combined seal |
| CN103906955A (en) * | 2011-10-25 | 2014-07-02 | 道达尔公司 | Isolating valve |
| CN102620006B (en) * | 2012-04-24 | 2014-05-21 | 邬官江 | Low-torque temperature-resistant ball valve |
| CN102620006A (en) * | 2012-04-24 | 2012-08-01 | 邬官江 | Low-torque temperature-resistant ball valve |
| CN102678538A (en) * | 2012-06-12 | 2012-09-19 | 许尚志 | Soft sealing mechanism of manual hydraulic pump |
| CN102878320A (en) * | 2012-09-29 | 2013-01-16 | 凯瑞特阀业有限公司 | Ball valve with a valve seat having functions of auto-cleaning and dust proofing |
| CN102878316A (en) * | 2012-10-23 | 2013-01-16 | 浙江超达阀门股份有限公司 | Ball valve reliable in sealing and low in opening-closing torque |
| CN102878316B (en) * | 2012-10-23 | 2014-03-12 | 浙江超达阀门股份有限公司 | Ball valve reliable in sealing and low in opening-closing torque |
| CN102878317A (en) * | 2012-10-23 | 2013-01-16 | 浙江超达阀门股份有限公司 | Pneumatic ball valve reliable in sealing and low in opening-closing torque |
| CN107795704A (en) * | 2016-08-31 | 2018-03-13 | 费海鸿 | Ultrahigh vacuum ball valve |
| CN108286615A (en) * | 2017-01-09 | 2018-07-17 | 凯泰阀门(集团)有限公司 | Compound sealing structure for ball valve |
| CN110043683A (en) * | 2018-01-16 | 2019-07-23 | 深圳市飞托克实业有限公司 | Valve |
| CN114352728A (en) * | 2020-10-12 | 2022-04-15 | 浙江盾安人工环境股份有限公司 | Flow regulating valve |
| WO2022078221A1 (en) * | 2020-10-12 | 2022-04-21 | 浙江盾安人工环境股份有限公司 | Flow control valve |
| CN114542748A (en) * | 2022-02-22 | 2022-05-27 | 浙江旭腾阀门有限公司 | Soft and hard sealing ball valve |
| CN114877074A (en) * | 2022-05-06 | 2022-08-09 | 宁波天擎航天科技有限公司 | Novel spherical sealing structure for rocket engine |
| CN114877074B (en) * | 2022-05-06 | 2023-09-22 | 宁波天擎航天科技有限公司 | Novel spherical sealing structure for rocket engine |
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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: 20101229 Termination date: 20140610 |