CN102635702A - Valve seat structure of metal hard-seal ball valve with anti-jamming pretension device - Google Patents
Valve seat structure of metal hard-seal ball valve with anti-jamming pretension device Download PDFInfo
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- CN102635702A CN102635702A CN2012100887637A CN201210088763A CN102635702A CN 102635702 A CN102635702 A CN 102635702A CN 2012100887637 A CN2012100887637 A CN 2012100887637A CN 201210088763 A CN201210088763 A CN 201210088763A CN 102635702 A CN102635702 A CN 102635702A
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Abstract
The invention relates to a valve seat structure of a metal hard-seal ball valve with an anti-jamming pretension device. The technical scheme includes that the valve seat structure of the metal hard-seal ball valve with the anti-jamming pretension device comprises a valve body, a ball and a valve seat, wherein the valve seat comprises a ball sealing end and a valve seat sealing end, a hard seal block is arranged at the ball sealing end of the valve seat, a circular buffer groove is arranged between the valve seat and the valve body, a buffer part and a valve seat sealing gland are arranged in the circular buffer groove, the buffer part is a helical elastic ring which surrounds the circular buffer groove and is formed by a steel wire in a coiling manner integrally, the steel wire is obliquely coiled, and a sealing component is arranged at the other end opposite to the end of the valve seat sealing gland butted against the helical elastic ring, a gap is reserved between one end of the valve seat extending to a valve runner and the valve body, and a filter component is arranged in the gap. According to the technical scheme, the valve seat structure of the metal heard-seal ball valve with the anti-jamming pretension device is capable of preventing blocking of solid media and has fine sealing effect.
Description
Technical field
The present invention relates to a kind of ball valve, particularly a kind of valve seat construction that has the metal hard-sealing ball valve of anti-sticking pre-tightening apparatus.
Background technique
Ball valve was come out the 1950's, along with the develop rapidly of science and technology, and the updating of production technology and product structure, in the 40 short years, having developed rapidly becomes a kind of main valve class.The flourishing country of industry in the west; The use of ball valve is constantly risen year by year; In China, ball valve is applied in industries such as petroleum refining, long-distance transport pipes, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, iron and steel widely, in national economy, occupies critical role.
At present, the sealing that fits tightly in order to ensure the spheroid of fixing ball valve and valve seat is provided with spring in the behind of valve seat usually, and the pretension compressive force of spring can make valve seat and spheroid fit tightly sealing.Under different temperature; The size of ball valve component can change because expand with heat and contract with cold; In order to prevent to cause the stuck of valve because of the change of element size; Also need spring be set, compensate the dimensional changes of valve components, thereby prevent the stuck of valve through the dilatation of spring in the behind of valve seat.Existing ball valve mainly adopts post helical spring or butterfly spring to be used to implement the function of anti-sticking.
As shown in Figure 1, the valve seat construction of the typical metal hard seal ball valve of employing cylindrically coiled spring comprises spheroid 1 ｀, valve seat 2 ｀, and valve base sealing 3 ｀, valve base sealing gland 4 ｀, cylindrically coiled spring 5 ｀ seal 6 ｀ and valve body 7 ｀.Extruding through valve seat 2 ｀ and valve base sealing gland 4 ｀; Valve base sealing 3 ｀ can guarantee the reliable sealing of valve seat 2 ｀ and valve body 7 ｀; Usually valve base sealing 3 ｀ adopt flexible graphite material, can be used for worst hot case, also can adopt other materials according to working condition.Sealing can prevent that to a certain extent solid dielectric from entering into spring chamber, and the general flexible graphite material that adopts of sealing goes for different temperature, pressure and medium operating mode, also can adopt other materials according to working condition.But owing to sealing does not have compacted; Therefore sealability is not fine, and when valve uses when containing a large amount of solid dielectrics for a long time, small solid dielectric can enter into spring chamber through sealing; And be deposited on the spring, final because the long-pending full inefficacy that causes spring at spring chamber of solid dielectric.In addition, adopt cylindrically coiled spring 5 ｀, according to the difference of ball valve specification; A plurality of cylindrically coiled spring 5 ｀ need be set usually; More than 10 cylindrically coiled spring 5 ｀ of the common needs of ball valve that bore is less, the ball valve that bore is bigger even up to a hundred cylindrically coiled spring 5 ｀ of needs, therefore; Adopt the ball valve of cylindrically coiled spring 5 ｀, its assembling and dismantle cumbersome.Particularly when ball valve was used to contain the medium of solid particle, because the size of cylindrically coiled spring 5 ｀ is less, the gap between the Spring Steel Wire was very little, and therefore, cylindrically coiled spring 5 ｀ are stopped up by solid dielectric easily and lost efficacy.
As shown in Figure 2, adopt the typical ball seat structure of butterfly spring, comprise the spheroid 1 of ball valve " and, valve seat 2 ", valve base sealing 3 ", valve base sealing gland 4 " and, butterfly spring 5 ", sealing 6 " and valve bodies 7 ".Through the extruding of valve seat 2 " with valve base sealing gland 4 ", valve base sealing 3 " can be guaranteed valve seat 3 " and valve body 7 " reliable sealing, valve base sealing 3 " adopts flexible graphite material, can be used for worst hot case, also can adopt other materials usually.Sealing can prevent that to a certain extent solid dielectric from entering into spring chamber, and the general flexible graphite material that adopts of sealing goes for different temperature, pressure and medium operating mode, also can adopt other materials according to working condition.But because that sealing does not have is compacted, so sealability is not fine, and when valve used for a long time, the small solid dielectric in the valve passage can enter into spring chamber through sealing, and is deposited on the spring.Adopt the valve seat construction of cylindrically coiled spring to compare with Fig. 1; Fig. 2 adopts butterfly spring 5 " valve seat construction; the space of spring chamber is bigger; be not easy to be stopped up by solid dielectric, and still, long-term use finally still might cause butterfly spring 5 because of long-pending expire in the butterfly spring chamber of solid dielectric " inefficacy.
Summary of the invention
To the deficiency that existing technology exists, the invention provides a kind of valve seat construction that prevents the metal hard-sealing ball valve that has the anti-sticking pre-tightening apparatus of solid dielectric obstruction, good airproof performance.
For realizing above-mentioned purpose; The invention provides following technological scheme: a kind of valve seat construction that has the metal hard-sealing ball valve of anti-sticking pre-tightening apparatus; Include valve body, be located at the interior spheroid of valve body valve pocket and be the valve seat that is sealed and matched with spheroid; Valve seat includes ball seal end and valve base sealing end, and the valve base sealing end place of valve seat is provided with the Expanded graphite sealing gasket, and the ball seal end place of valve seat is provided with the hard sealing block of fitting and sealing with spheroid; Be provided with the ring-type dashpot that valve seat and valve body combination back forms between valve seat and the valve body; Be provided with shock absorber and valve base sealing gland in the ring-type dashpot, an end of valve base sealing gland and Expanded graphite sealing gasket are conflicted, and the other end and shock absorber are conflicted; It is characterized in that: described shock absorber for be provided with around the loop buffer groove by the integrated around the home helical elastic ring of steel wire; The steel wire pitch of the laps is around the home skewed, said helical elastic ring with respect to the conflict the other end place black box of an end of valve base sealing gland, some conflict points of the both sides of helical elastic ring are elasticity with valve base sealing gland and black box respectively and conflict and cooperate; Valve seat extends to be provided with between an end and the valve body of valve flowing channel and supplies pressure medium to get into buffer cavity black box to be implemented the gap that compresses, be provided with filter assemblies in this gap.
Wherein, Black box includes and is in the dashpot and flexible graphite gasket that outer ring and valve body conflict sealing, inner ring and valve seat conflict seal and elastic ring gland and the seal joint that is attached at the flexible graphite gasket both lateral sides; Wherein elastic ring gland and helical elastic ring are conflicted, and seal joint and valve body are conflicted.
Adopt technique scheme; Between valve body and valve seat, dashpot is set; And the shock absorber that will be in the dashpot is arranged to by steel wire helical elastic ring around the home, and in terms of existing technologies, the spacing in this type of helical elastic ring that is formed around the home by steel wire between the steel wire pitch of the laps is bigger; When ball valve was used to contain the medium of solid, the helical elastic ring was difficult for being stopped up and the situation generation of inefficacy and chucking by solid dielectric; Next is because the helical elastic ring is to be formed around the home by steel wire, because it is a circle body, thus only need a steel wire just can implement processing usually, so its manufacture cost is lower, thus cost of production reduced; Last because helical elastic ring is that the dashpot of the annular between valve body and valve seat is provided with, and after being provided with like this, flexible conflict is implemented with valve body and valve seat respectively in the both sides of helical elastic ring; The both sides of helical elastic ring not only have higher compressive strength; Have elastic force preferably, and can self-return after use, cylindrically coiled spring of the prior art relatively and butterfly spring adopt axial both ends of the surface and valve body and valve seat to conflict; The helical elastic ring has more conflict point; Therefore, the elastic force of spiral helicine elastic ring can be distributed on the valve seat uniformly, can further prevent to produce between valve seat and the valve body situation of chucking.And helical elastic ring and valve base sealing gland are when implementing to conflict; The valve base sealing gland can receive elasticity to be continued the Expanded graphite sealing gasket is implemented to conflict; Constitute the lasting sealing of Expanded graphite sealing gasket; Guaranteed the sealability of Expanded graphite sealing gasket, the Expanded graphite sealing gasket at this place is the Expanded graphite sealing gasket, and being provided with like this is in order to adapt to worst hot case.The helical elastic ring with respect to the conflict the other end place black box of an end of valve base sealing gland, the pressure that is provided with in the valve pocket of sealing assembly leaks.Black box during the present invention further is provided with is made up of flexible graphite gasket and elastic ring gland and the seal joint of being located at the flexible graphite gasket both sides; Flexible graphite gasket is used for sealed valve body and valve seat; The setting of elastic ring gland and seal joint then can be used as the reference body of conflict; Make the helical elastic ring can implement lasting conflict, thereby improved the sealability of flexible graphite gasket gasket seal.Helical elastic ring among the present invention is very convenient in installation and unloading process, need not to compress, and only needs it is positioned in the dashpot.Be provided with the setting that supplies pressure medium to get into the gap that buffer cavity implements black box to compress between valve seat and the valve body and be in order pressure medium in the valve flowing channel can be entered in the ring-type dashpot and by means of black box and helical elastic ring compressed enforcement compressing valve seat; Make the sealing between valve seat and the spheroid more compact, the setting of gap inner filtration assembly then is to cause stuck in order to prevent that particulate contamination in the medium from entering in the ring-type dashpot to the helical elastic ring.
The present invention further is set to: filter assemblies is to be installed on the Expanded graphite filter block in the gap between valve seat and the valve body.
Adopt technique scheme, the effect of filtration is not only played in setting like this, and applicable to worst hot case.
Below in conjunction with accompanying drawing the present invention is further described.
Description of drawings
Fig. 1 is the schematic representation 1 of background technique;
Fig. 2 is the schematic representation 2 of background technique;
Fig. 3 is the partial schematic diagram of the embodiment of the invention;
Fig. 4 is the schematic perspective view of helical elastic ring in the embodiment of the invention;
Fig. 5 is the schematic perspective view of helical elastic ring in the embodiment of the invention.
Embodiment
Like Fig. 3-a kind of valve seat construction that has the metal hard-sealing ball valve of anti-sticking pre-tightening apparatus shown in Figure 5; Include valve body 1, be located at the spheroids 2 in valve body 1 valve pocket 11 and be the valve seat 3 that is sealed and matched with spheroid 2; Valve seat 3 includes ball seal end 31 and valve base sealing end 32; Valve base sealing end 32 places of valve seat 3 are provided with Expanded graphite sealing gasket 321, and ball seal end 31 places of valve seat 3 are provided with the hard sealing block 311 of fitting and sealing with spheroid 2, and hard sealing block 311 is and the integrated part of valve seat; Be provided with valve seat 3 between valve seat 3 and the valve body 1 and make up the ring-type dashpot 4 that the back forms with valve body 1; Be provided with shock absorber and valve base sealing gland 5 in the ring-type dashpot 4; One end of valve base sealing gland 5 and Expanded graphite sealing gasket 321 are conflicted; The other end and shock absorber are conflicted, shock absorber be around 4 settings of loop buffer groove by steel wire 61 integrated helical elastic rings 6 around the home, steel wire pitch of the laps 61 is around the home skewed; In terms of existing technologies; Spacing in this type of helical elastic ring 6 that is formed around the home by steel wire between the steel wire pitch of the laps 61 is bigger, and when ball valve was used to contain the medium of solid, helical elastic ring 6 was difficult for being stopped up and losing efficacy and the situation of chucking take place by solid dielectric; Next is because helical elastic ring 6 is to be formed around the home by steel wire, because it is a circle body, thus only need a steel wire just can implement processing usually, so its manufacture cost is lower, thus cost of production reduced; Last because helical elastic ring 6 is dashpot 4 settings of the annular between valve body 1 and valve seat 3; After being provided with like this; Flexible conflict is implemented with valve base sealing gland 5 and elastic ring gland 72 respectively in the both sides of helical elastic ring 6; Helical elastic ring 6 not only has higher compressive strength, and has elastic force and restoring force preferably, and cylindrically coiled spring of the prior art relatively and butterfly spring adopt axial both ends of the surface and valve body and valve seat to conflict; Helical elastic ring 6 has more conflict point; Therefore, the elastic force of helical elastic ring 6 can be distributed on the valve seat 3 uniformly, can further prevent to produce between valve seat 3 and the valve body 1 situation of chucking.And helical elastic ring 6 is when implementing to conflict with valve base sealing gland 5; Valve base sealing gland 5 can receive elasticity to be continued Expanded graphite sealing gasket 321 is implemented to conflict; Constitute the lasting sealing of Expanded graphite sealing gasket 321; Guaranteed the sealability of Expanded graphite sealing gasket 321, selecting Expanded graphite sealing gasket 321 for use is in order to adapt to worst hot case.Helical elastic ring 6 with respect to the conflict the other end place black box 7 of an end of valve base sealing gland 5, some conflict points of the both sides of helical elastic ring 6 are the elasticity conflict with valve base sealing gland 5 and black box 7 respectively and cooperate.Helical elastic ring 6 can resultfully prevent that with respect to the other end place black box 7 with valve base sealing gland 5 conflicts one end the small solid dielectric at valve body 1 passage place from entering in the helical elastic ring 6.Need to prove; In order pressure medium in valve body 1 runner can be entered in the ring-type dashpot 4 and by means of black box 7 and helical elastic ring 6 compressed enforcement compressing valve seat 3; Make the sealing between valve seat 3 and the spheroid 2 more compact; Valve seat 3 extends to be provided with between an end and the valve body 1 of valve body 1 runner and supplies pressure medium to get into buffer cavity black box 7 to be implemented the gap 8 that compresses, be provided with filter assemblies 9 in this gap 8, and filter assemblies is to be installed on the Expanded graphite filter block in the gap between valve seat and the valve body; The effect of filtration is not only played in setting like this, and applicable to worst hot case.
In the embodiment of the invention 1 and 2; Black box 7 includes and is in the dashpot 4 and flexible graphite gasket 71 that inner ring and valve body 1 conflict sealing, outer ring and valve seat 3 conflicts seal and elastic ring gland 72 and the seal joint 73 that is attached at flexible graphite gasket 71 both lateral sides; Wherein elastic ring gland 72 is conflicted with helical elastic ring 6, and seal joint 73 is conflicted with valve body 1.Flexible graphite gasket 71 is used for sealed valve body 1 and valve seat 3; The setting of elastic ring gland 72 and seal joint 73 then can be used as the reference body of conflict; Make helical elastic ring 6 can implement lasting conflict, thereby improved the sealability of flexible graphite gasket 71 flexible graphite gasket 71.
Helical elastic ring 6 steel wire pitch of the laps 61 in forming process adopts the angle of inclination in the such scheme, and the angle of inclination can be decided according to design, helical elastic ring 6 is carried in both sides have good elasticity when stressed.
Claims (3)
1. valve seat construction that has the metal hard-sealing ball valve of anti-sticking pre-tightening apparatus; Include valve body, be located at the interior spheroid of valve body valve pocket and be the valve seat that is sealed and matched with spheroid; Valve seat includes ball seal end and valve base sealing end; The valve base sealing end place of valve seat is provided with the Expanded graphite sealing gasket; The ball seal end place of valve seat is provided with the hard sealing block of fitting and sealing with spheroid, is provided with the ring-type dashpot that valve seat and valve body combination back forms between valve seat and the valve body, is provided with shock absorber and valve base sealing gland in the ring-type dashpot; One end of valve base sealing gland and Expanded graphite sealing gasket are conflicted; The other end and shock absorber are conflicted, and it is characterized in that: described shock absorber for be provided with around the loop buffer groove by the integrated around the home helical elastic ring of steel wire, the steel wire pitch of the laps is around the home skewed; Said helical elastic ring with respect to the conflict the other end place black box of an end of valve base sealing gland, some conflict points of the both sides of helical elastic ring are elasticity with valve base sealing gland and black box respectively and conflict and cooperate; Valve seat extends to be provided with between an end and the valve body of valve flowing channel and supplies pressure medium to get into buffer cavity black box to be implemented the gap that compresses, be provided with filter assemblies in this gap.
2. the valve seat construction that has the metal hard-sealing ball valve of anti-sticking pre-tightening apparatus according to claim 1; It is characterized in that: described black box includes and is in the dashpot and flexible graphite gasket that outer ring and valve body conflict sealing, inner ring and valve seat conflict seal and elastic ring gland and the seal joint that is attached at the flexible graphite gasket both lateral sides; Wherein elastic ring gland and helical elastic ring are conflicted, and seal joint and valve body are conflicted.
3. the valve seat construction that has the metal hard-sealing ball valve of anti-sticking pre-tightening apparatus according to claim 1 and 2 is characterized in that: described filter assemblies is to be installed on the Expanded graphite filter block in the gap between valve seat and the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100887637A CN102635702A (en) | 2012-03-29 | 2012-03-29 | Valve seat structure of metal hard-seal ball valve with anti-jamming pretension device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100887637A CN102635702A (en) | 2012-03-29 | 2012-03-29 | Valve seat structure of metal hard-seal ball valve with anti-jamming pretension device |
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| CN102635702A true CN102635702A (en) | 2012-08-15 |
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| CN2012100887637A Pending CN102635702A (en) | 2012-03-29 | 2012-03-29 | Valve seat structure of metal hard-seal ball valve with anti-jamming pretension device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104455524A (en) * | 2014-09-30 | 2015-03-25 | 江苏亿阀集团有限公司 | Composite sealing low-temperature ball valve |
| CN107327589A (en) * | 2017-07-31 | 2017-11-07 | 昆山维萨阀门有限公司 | A kind of HTHP fixing ball valve |
| CN107559448A (en) * | 2017-10-18 | 2018-01-09 | 兰州高压阀门有限公司 | A kind of high-temperature wearable hard seal ball valve seat with dustproof construction |
| CN110785593A (en) * | 2017-06-20 | 2020-02-11 | 艾默生过程管理(印度)私人有限公司 | Non-pressure reducing ball valve |
| CN111677612A (en) * | 2020-06-24 | 2020-09-18 | 蒋惠 | High-capacity quantitative fuel injection valve with inductance circuit |
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| CN201764002U (en) * | 2010-09-19 | 2011-03-16 | 浙江超达阀门股份有限公司 | Metal hard sealing ball valve |
| CA2775731A1 (en) * | 2009-10-02 | 2011-04-07 | Saint-Gobain Performance Plastics Corporation | Modular polymeric emi/rfi seal |
| CN202646769U (en) * | 2012-03-29 | 2013-01-02 | 浙江超达阀门股份有限公司 | Valve seat structure of metal hard seal ball valve with anti-sticking pre-tightening device |
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| US4029292A (en) * | 1976-04-06 | 1977-06-14 | Eisenbahn-Verkehrsmittel Ag | Globe valve construction |
| US4286614A (en) * | 1979-09-19 | 1981-09-01 | Acf Industries, Incorporated | High temperature ball valve |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104455524A (en) * | 2014-09-30 | 2015-03-25 | 江苏亿阀集团有限公司 | Composite sealing low-temperature ball valve |
| CN104455524B (en) * | 2014-09-30 | 2017-06-20 | 江苏亿阀集团有限公司 | A kind of compound seal cryogenic ball valve |
| CN110785593A (en) * | 2017-06-20 | 2020-02-11 | 艾默生过程管理(印度)私人有限公司 | Non-pressure reducing ball valve |
| CN110785593B (en) * | 2017-06-20 | 2022-06-21 | 艾默生过程管理(印度)私人有限公司 | Non-pressure reducing ball valve |
| CN107327589A (en) * | 2017-07-31 | 2017-11-07 | 昆山维萨阀门有限公司 | A kind of HTHP fixing ball valve |
| CN107559448A (en) * | 2017-10-18 | 2018-01-09 | 兰州高压阀门有限公司 | A kind of high-temperature wearable hard seal ball valve seat with dustproof construction |
| CN111677612A (en) * | 2020-06-24 | 2020-09-18 | 蒋惠 | High-capacity quantitative fuel injection valve with inductance circuit |
| CN111677612B (en) * | 2020-06-24 | 2021-07-13 | 苏州宝凡电子科技有限公司 | High-capacity quantitative fuel injection valve with inductance circuit |
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Application publication date: 20120815 |