CN102734486A - Valve assembly sealing device of low temperature ball valve - Google Patents
Valve assembly sealing device of low temperature ball valve Download PDFInfo
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- CN102734486A CN102734486A CN201210205878XA CN201210205878A CN102734486A CN 102734486 A CN102734486 A CN 102734486A CN 201210205878X A CN201210205878X A CN 201210205878XA CN 201210205878 A CN201210205878 A CN 201210205878A CN 102734486 A CN102734486 A CN 102734486A
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Abstract
The invention discloses a valve assembly sealing device of a low temperature ball valve. Aiming at overcoming the disadvantages of an elastic valve sealing assembly of a low temperature ball valve, the invention adopts the technical scheme of converting motive seal to static seal. The valve assembly sealing device is characterized in that on the basis of the elastic sealing assembly, a corrugated pipe is added; one end of the corrugated pipe is fixed on an inlet flange or an outlet flange of the ball valve, and the other end of the corrugated pipe is welded with a moving part valve seat of the elastic sealing assembly; a seal ring is embedded on the valve seat; and through the sealing specific pressure generated under the actions of spring force, the force of the corrugated pipe and medium force, the ball valve can reach the sealing requirement. Other parts of the elastic sealing assembly no longer require motive seal, so the problem of internal leakage is solved. After the corrugated pipe is added, under the actions of the spring force, the force of the corrugated pipe, the seal ring has big contact pressure to a ball, and during the opening and closing processes of the valve, the ball valve is easy to wear down. In order to prolong the service life of the valve, a motive seal control cam is added, which has the function of pushing the valve seat away towards the two sides of the ball by force during the opening and closing processes of the valve, and the seal ring is embedded on the valve seat and no longer contacts with the ball, so the seal ring is protected.
Description
Technical field
The invention belongs to valve technology field, relate to a kind of cryogenic ball valve valve combination seal arrangement.
Background technique
Teflon has good sealing property under cryogenic conditions, so cryogenic ball valve generally selects for use teflon as the ball seal material.When temperature descended, the heat between metal parts and the PTFE stuffing materials was flexible asynchronous, and ball seal is destroyed, Here it is general ball valve when the low temperature environment temperature descends, the reason of leakage easily under the low pressure.
In order to guarantee that ball valve can have better seal property under the cryogenic conditions, existing technology generally adopts the elastic packing assembly, it is characterized in that: spring is set in the black box; Lean on spring force to promote seal ring, spheroid and seal ring are Elastic Contact, solve the flexible asynchronous problem of heat between metal parts and the PTFE stuffing materials; Under the working condition; Spring force and the acting in conjunction of medium power produce seal pressure, make ball valve reach seal request.The elastic packing assembly is except spheroid adopts the teflin ring motive sealing, and it is its defective that other parts also need motive sealing, because operating temperature is low, the motive sealing is here usually failed, and leaks in producing.
Summary of the invention
Technology path:, adopt the method that motive sealing is changed into static seal, on elastic packing assembly basis to the defective of elastic packing assembly; Increase bellows components, bellows one end is fixed on the ball valve import or export flange, and the movement parts valve seat of the other end and elastic packing assembly is welded together; Seal ring is embedded on the valve seat; Lean on spring force, bellows power and the effect of medium power, produce seal pressure, make ball valve reach seal request.The elastic packing assembly no longer includes other parts needs motive sealing, and interior leakage problem is able to solve.After increasing bellows components, seal ring is under spring force, the effect of bellows power, and is bigger to the contact pressure of spheroid; In valve opening and the process of closing, easy abrasion is to increase life of valve; On spheroid, increased motive sealing control cam, its effect is in valve opening and the process of closing; Valve seat is pushed open to the spheroid both sides by force, and seal ring is embedded on the valve seat, no longer contacts with spheroid thereby is protected.
The technological scheme that the present invention adopts comprises valve body 3, spheroid 14, valve seat 13, spring 11, bellows 10, end cap 1, valve seat insert 12, motive sealing control cam 29, nut 8, double-screw bolt 9, valve rod 16, following stationary axle 4, pad 2, blind plate 6, following stationary axle pad 30, O type circle 5; Cryogenic ball valve valve combination seal arrangement is that the center and arranged on left and right sides is symmetrically distributed with spheroid 14; It is characterized in that: two motive sealing control cams 29 are enclosed within respectively on upper and lower two pillow blocks of spheroid 14 through central bore, and fix through the key bar that is added in the keyway.Valve rod 16 inserts pillow block on the spheroid 14 from the upper end, and fixes through the key bar that is added in the keyway, and following stationary axle 4 inserts 14 times pillow blocks of spheroid from the lower end, spheroid 14 is fixed in the valve body 3.Bellows 10 is embedded within the bellows tank of bellows tank and valve seat 13 of end cap 1; Three's coaxial welding connects as a whole; One group of spring 11 withstands on respectively between end cap 1 and the valve seat 13 along the location hole of the spring on the end cap 1; Valve seat insert 12 is embedded in the valve base sealing ring recess of valve seat 13; Then end cap 1, bellows 10, valve seat 13, spring 11, valve seat insert 12 formed assembly integral body are inserted from the entry end or the outlet end of valve body 3 through holes, offseted up to the sphere of valve seat insert 12 with spheroid 14.End cap 1 is fixed on the valve body 3 through nut 8, double-screw bolt 9, and pad 2 is between end cap 1 and valve body 3.O type circle 5 is fixed on the valve body 3 with hexagon socket head cap screw 7 after being enclosed within on the blind plate 6, and following stationary axle pad 30 is between blind plate 6 and following stationary axle 4.
Described cryogenic ball valve valve combination seal arrangement is characterized in that: the resultant direction of all springs 11 of spheroid 14 homonymies and the active force of 10 pairs of valve seats 13 of bellows is always pointed to spheroid 14 in the mobile range of valve seat 13.
Described motive sealing control cam 29, it is characterized in that: cam profile is a surplus part after the circumscribed square of a roundlet is cut four jiaos by another concentric great circle.Spheroid 14 is closed or during open mode, the beeline of left and right two valve seats is L, and big diameter of a circle should be greater than L, and little diameter of a circle should be less than L.The difference of big diameter of a circle and L equals the poor of L and axis of small circle.Motive sealing control cam 29 is when cryogenic ball valve valve closing or open mode, and the gap between the valve seat is maximum.
Description of drawings
Fig. 1 is a cryogenic ball valve general structure schematic representation in the embodiment of the invention 1
Fig. 2 is a cryogenic ball valve valve combination seal arrangement general structure schematic representation in the embodiment of the invention 1
Fig. 3 is the local structure for amplifying schematic representation of cryogenic ball valve valve combination seal arrangement in the embodiment of the invention 1
Fig. 4 is a sphere structure schematic representation in the embodiment of the invention 1, and the bottom right is a front view, and a left side is side view down, and upper right is plan view
Fig. 5 is an end cap structural representation in the embodiment of the invention 1, and the right side is a front view, and a left side is a side view
Fig. 6 is a motive sealing control cam structure schematic representation in the embodiment of the invention 1, and the right side is a front view, and a left side is a side view
Fig. 7 is a valve seat construction schematic representation in the embodiment of the invention 1
Among the figure: 1. end cap, 2. pad, 3. valve body 4. descends stationary axle, 5.O type circle, 6. blind plate; 7. hexagon socket head cap screw, 8. nut, 9. double-screw bolt, 10. bellows, 11. springs, 12. valve seat inserts; 13. valve seat, 14. spheroids, 15. outlet valves, 16. valve rods, 17. valve rod O type circles, 18. glands; 19. support, 20. fillers, 21. Glands, 22. Stem Muts, 23. valve rod double-screw bolts, 24. valve rod hexagon socket head cap screws; 25. grease pouring valve, 26. drive cassette nuts, 27. drive cassette double-screw bolts, 28. turbine heads, 29. motive sealings control cam, 30. times stationary axle pads.
Embodiment
A kind of cryogenic ball valve
A kind of cryogenic ball valve technological scheme of present embodiment such as Fig. 1, Fig. 2, shown in Figure 3:
Described cryogenic ball valve valve combination seal arrangement is characterized in that: the resultant direction of all springs 11 of spheroid 14 homonymies and the active force of 10 pairs of valve seats 13 of bellows is always pointed to spheroid 14 in the mobile range of valve seat 13.
Described motive sealing control cam 29, it is characterized in that: cam profile is a surplus part after the circumscribed square of a roundlet is cut four jiaos by another concentric great circle.Spheroid 14 is closed or during open mode, the beeline of left and right two valve seats is L, and big diameter of a circle should be greater than L, and little diameter of a circle should be less than L.The difference of big diameter of a circle and L equals the poor of L and axis of small circle.Motive sealing control cam 29 is when cryogenic ball valve valve closing or open mode, and the gap between the valve seat is maximum.
Claims (3)
1. cryogenic ball valve valve combination seal arrangement; Comprise valve body 3, spheroid 14, valve seat 13, spring 11, bellows 10, end cap 1, valve seat insert 12, motive sealing control cam 29, hexagon socket head cap screw 7, nut 8, double-screw bolt 9, valve rod 16, following stationary axle 4, pad 2, blind plate 6, following stationary axle pad 30, O type circle 5; Cryogenic ball valve valve combination seal arrangement is that the center and arranged on left and right sides is symmetrically distributed with spheroid 14; It is characterized in that: two motive sealing control cams 29 are enclosed within respectively on upper and lower two pillow blocks of spheroid 14 through central bore, and fix through the key bar that is added in the keyway.Valve rod 16 inserts pillow block on the spheroid 14 from the upper end, and fixes through the key bar that is added in the keyway, and following stationary axle 4 inserts 14 times pillow blocks of spheroid from the lower end, spheroid 14 is fixed in the valve body 3.Bellows 10 is embedded within the bellows tank of bellows tank and valve seat 13 of end cap 1; Three's coaxial welding connects as a whole; One group of spring 11 withstands on respectively between end cap 1 and the valve seat 13 along the location hole of the spring on the end cap 1; Valve seat insert 12 is embedded in the valve base sealing ring recess of valve seat 13; Then end cap 1, bellows 10, valve seat 13, spring 11, valve seat insert 12 formed assembly integral body are inserted from the entry end or the outlet end of valve body 3 through holes, offseted up to the sphere of valve seat insert 12 with spheroid 14.End cap 1 is fixed on the valve body 3 through nut 8, double-screw bolt 9, and pad 2 is between end cap 1 and valve body 3.O type circle 5 is fixed on the valve body 3 with hexagon socket head cap screw 7 after being enclosed within on the blind plate 6, and following stationary axle pad 30 is between blind plate 6 and following stationary axle 4.
2. cryogenic ball valve valve combination seal arrangement according to claim 1 is characterized in that: the resultant direction of all springs 11 of spheroid 14 homonymies and the active force of 10 pairs of valve seats 13 of bellows is always pointed to spheroid 14 in the mobile range of valve seat 13.
3. motive sealing control cam 29 according to claim 1, it is characterized in that: cam profile is a surplus part after the circumscribed square of a roundlet is cut four jiaos by another concentric great circle.Spheroid 14 is closed or during open mode, the beeline of left and right two valve seats is L, and big diameter of a circle should be greater than L, and little diameter of a circle should be less than L.The difference of big diameter of a circle and L equals the poor of L and axis of small circle.Motive sealing control cam 29 is when cryogenic ball valve valve closing or open mode, and the gap between the valve seat is maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210205878XA CN102734486A (en) | 2012-06-21 | 2012-06-21 | Valve assembly sealing device of low temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210205878XA CN102734486A (en) | 2012-06-21 | 2012-06-21 | Valve assembly sealing device of low temperature ball valve |
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| CN102734486A true CN102734486A (en) | 2012-10-17 |
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| CN201210205878XA Pending CN102734486A (en) | 2012-06-21 | 2012-06-21 | Valve assembly sealing device of low temperature ball valve |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900864A (en) * | 2012-10-31 | 2013-01-30 | 替克斯阀门有限公司 | Pipeline ball valve and manufacturing method thereof |
| CN103775671A (en) * | 2012-10-22 | 2014-05-07 | 中国核动力研究设计院 | Corrugated pipe structure based self-compensating electric ball valve |
| CN105422900A (en) * | 2015-12-15 | 2016-03-23 | 岳阳东方自控工程设备有限公司 | Ball valve with non-contact valve ball and valve seats during rotation |
| CN106523730A (en) * | 2015-09-12 | 2017-03-22 | 江苏江恒阀业有限公司 | Low-wear ball valve |
| CN107725815A (en) * | 2017-09-30 | 2018-02-23 | 雷蒙德(北京)科技股份有限公司 | Fixed ball valve |
| CN107830199A (en) * | 2017-10-20 | 2018-03-23 | 上海阀门厂股份有限公司 | A kind of valve spreading mechanism |
| CN108953650A (en) * | 2017-05-22 | 2018-12-07 | 湖南北科通用阀门有限公司 | A kind of electric magnetic ball valve for being not easy to reveal |
| CN110206910A (en) * | 2019-07-10 | 2019-09-06 | 自贡自高阀门有限公司 | A kind of horizontal axis Top Loading Type Pipe Cleaning Valve |
| CN110469687A (en) * | 2019-08-01 | 2019-11-19 | 江苏特一机械股份有限公司 | High temperature NK valve |
| CN111442111A (en) * | 2020-05-08 | 2020-07-24 | 安徽沃泰控制阀门有限公司 | Automatic compensation ball valve for pipeline system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566482A (en) * | 1985-06-27 | 1986-01-28 | Stunkard Gerald A | Top entry trunnion ball valve |
| CN2600664Y (en) * | 2003-02-28 | 2004-01-21 | 江苏苏盐阀门管件厂 | Cam-type wearless ball valve |
| CN101761663A (en) * | 2009-12-25 | 2010-06-30 | 昆山维萨阀门有限公司 | Bellows ball valve |
| CN201934708U (en) * | 2010-12-28 | 2011-08-17 | 吴军 | Hard-soft double layer combined seal valve seat of corrugation pipe |
| CN201954041U (en) * | 2011-04-19 | 2011-08-31 | 浙江超达阀门股份有限公司 | Valve seat structure of metal hard sealing ball valve |
-
2012
- 2012-06-21 CN CN201210205878XA patent/CN102734486A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566482A (en) * | 1985-06-27 | 1986-01-28 | Stunkard Gerald A | Top entry trunnion ball valve |
| CN2600664Y (en) * | 2003-02-28 | 2004-01-21 | 江苏苏盐阀门管件厂 | Cam-type wearless ball valve |
| CN101761663A (en) * | 2009-12-25 | 2010-06-30 | 昆山维萨阀门有限公司 | Bellows ball valve |
| CN201934708U (en) * | 2010-12-28 | 2011-08-17 | 吴军 | Hard-soft double layer combined seal valve seat of corrugation pipe |
| CN201954041U (en) * | 2011-04-19 | 2011-08-31 | 浙江超达阀门股份有限公司 | Valve seat structure of metal hard sealing ball valve |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775671A (en) * | 2012-10-22 | 2014-05-07 | 中国核动力研究设计院 | Corrugated pipe structure based self-compensating electric ball valve |
| CN102900864A (en) * | 2012-10-31 | 2013-01-30 | 替克斯阀门有限公司 | Pipeline ball valve and manufacturing method thereof |
| CN102900864B (en) * | 2012-10-31 | 2015-01-07 | 替克斯阀门有限公司 | Pipeline ball valve and manufacturing method thereof |
| CN106523730A (en) * | 2015-09-12 | 2017-03-22 | 江苏江恒阀业有限公司 | Low-wear ball valve |
| CN105422900A (en) * | 2015-12-15 | 2016-03-23 | 岳阳东方自控工程设备有限公司 | Ball valve with non-contact valve ball and valve seats during rotation |
| CN108953650A (en) * | 2017-05-22 | 2018-12-07 | 湖南北科通用阀门有限公司 | A kind of electric magnetic ball valve for being not easy to reveal |
| CN107725815A (en) * | 2017-09-30 | 2018-02-23 | 雷蒙德(北京)科技股份有限公司 | Fixed ball valve |
| CN107830199A (en) * | 2017-10-20 | 2018-03-23 | 上海阀门厂股份有限公司 | A kind of valve spreading mechanism |
| CN110206910A (en) * | 2019-07-10 | 2019-09-06 | 自贡自高阀门有限公司 | A kind of horizontal axis Top Loading Type Pipe Cleaning Valve |
| CN110469687A (en) * | 2019-08-01 | 2019-11-19 | 江苏特一机械股份有限公司 | High temperature NK valve |
| CN111442111A (en) * | 2020-05-08 | 2020-07-24 | 安徽沃泰控制阀门有限公司 | Automatic compensation ball valve for pipeline system |
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Application publication date: 20121017 |