CN203374865U - Combined seal low-temperature float ball valve - Google Patents
Combined seal low-temperature float ball valve Download PDFInfo
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- CN203374865U CN203374865U CN201320405935.9U CN201320405935U CN203374865U CN 203374865 U CN203374865 U CN 203374865U CN 201320405935 U CN201320405935 U CN 201320405935U CN 203374865 U CN203374865 U CN 203374865U
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Abstract
The utility model discloses a combined seal low-temperature float ball valve. The combined seal low-temperature float ball valve comprises a valve body, a valve cover, a ball body, a valve rod, a pressing cover, a stud and a screw, wherein the ball body is arranged in the valve body, the valve cover is connected with the valve body through the stud, the pressing cover is connected with the valve body through the screw, the valve rod is arranged in the pressing cover in a clamped mode, the bottom of the valve rod is connected with the top of the ball body, combined seal layers are arranged between the pressing cover and the valve body and between the valve cover and the valve body, the stud is provided with a first nut, and elastic spacers are arranged between the first nut and the valve cover and arranged on the screw. According to the combined seal low-temperature float ball valve, by means of the combined seal layers, seal performance between the pressing cover and the valve body and seal performance between the valve cover and the valve body are guaranteed; the elastic spacers are used for providing pre-tightening force for the space between the valve cover and the valve body and the space between the pressing cover and the valve body, so that leakage of seal parts between the valve cover and the valve body and between the pressing cover and the valve body will not occur.
Description
Technical field
The utility model relates to a kind of low temperature floating ball valve, relates in particular to a kind of compound seal low temperature floating ball valve.
Background technique
The cryogenic ball valve of present stage comprises valve body, valve gap, spheroid, valve rod, gland, spheroid is arranged in valve body, valve gap is arranged on valve body, be provided with to fix both double-screw bolts on valve gap and valve body, gland is arranged on valve body, be provided with to fix both screws on gland and valve body, valve rod is fastened in gland, and stem bottom is connected with the spheroid top.Cryogenic ball valve mainly is applicable on the chemical plant installationss such as ethene, LNG Liquefied natural gas, and the liquid cryogenic media of output is as ethene, liquid oxygen, liquid hydrogen etc.This class medium is not only inflammable and explosive, and will to gasify, gasify when heating up be hundreds of times of volumetric expansions.And these medium osmosis power are strong, easily reveal.And the sealing between the valve gap and valve body of the cryogenic ball valve of present stage, between gland and valve body is poor; Adopt packing seal between valve rod and gland, but in use, its sealability is lower; The length of gland is 50mm, and length is shorter, and stuffing box is easy to freeze and causes seal failure; In addition, in ball valve, residual medium, because the be rapidly heated gasification, pressure of the relatively-high temperature of surrounding environment sharply raises, causes the generation of the problems such as seal leakage, fastening piece inefficacy.
The model utility content
The purpose of this utility model is for above-mentioned the deficiencies in the prior art, and a kind of compound seal low temperature floating ball valve that can guarantee sealability is provided.
The technical solution of the utility model is achieved in that a kind of compound seal low temperature floating ball valve, it comprises valve body, valve gap, spheroid, valve rod, gland, double-screw bolt, screw, described spheroid is arranged in valve body, described valve gap is connected with valve body by double-screw bolt, described gland is connected with valve body by screw, described valve rod is fastened in gland, described stem bottom is connected with the spheroid top, between described gland and valve body, be provided with the compound seal layer between described valve gap and valve body, be provided with the first nut on described double-screw bolt, between described the first nut and valve gap and be provided with resilient pad on screw.
Preferably, compound seal layer between described gland and valve body comprises the first spring energy-storage seal ring, the first annular spirotallic gasket, the surface of contact of described gland and valve body has two-layer stepped the first draw-in groove, described the first spring energy-storage seal ring is arranged near on stepped first draw-in groove of spheroid, and the described first annular spirotallic gasket is arranged on stepped the first draw-in groove away from spheroid; Compound seal layer between described valve gap and valve body comprises the second spring energy-storage seal ring, the second annular spirotallic gasket, the surface of contact of described valve gap and valve body all has two-layer second-order scalariform draw-in groove, described the second spring energy-storage seal ring is arranged near on the second-order scalariform draw-in groove of spheroid, and the described second annular spirotallic gasket is arranged on the second-order scalariform draw-in groove away from spheroid.
Preferably, described gland inwall bottom is provided with groove, and described stem lower portion outer wall is provided with projection, described projection is fastened in groove, gland is stretched out at described valve rod top, and described valve rod upper end is provided with the second nut, dish spring, and described dish spring is between the second nut and gland.
Preferably, the length of described gland is 200mm.
Preferably, be provided with relief hole on described spheroid.
The beneficial effects of the utility model are: the setting of compound seal layer, and make between gland and valve body and all there is two-layer sealing between valve gap and valve body, guaranteed between gland and valve body and the sealability between valve gap and valve body; The setting of resilient pad, in order to give between valve gap and valve body and to provide pretightening force between gland and valve body, make Sealing between valve gap and valve body and the Sealing between gland and valve body not there will be seepage.
The accompanying drawing explanation
Below in conjunction with the embodiment in accompanying drawing, the utility model is described in further detail, but do not form any restriction of the present utility model.
The structural representation that Fig. 1 is the present embodiment;
The partial enlarged drawing that Fig. 2 is A place in Fig. 1;
The partial enlarged drawing that Fig. 3 is B place in Fig. 1.
In figure:
The 1-valve body; The 2-valve gap; The 3-spheroid; The 4-valve rod; The 5-gland; The 6-double-screw bolt; The 7-screw; 8-the first nut; The 9-resilient pad; 10-the first spring energy-storage seal ring; The annular spirotallic gasket of 11-first; 12-the first draw-in groove; The 13-groove; The 14-projection; 15-the second nut; 16-dish spring; 17-the second spring energy-storage seal ring; The annular spirotallic gasket of 18-second; 19-the second draw-in groove.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection domain of the present utility model is made to more explicit defining.
Consult Fig. 1, Fig. 2, shown in Fig. 3, a kind of compound seal low temperature floating ball valve of the present embodiment, it comprises valve body 1, valve gap 2, spheroid 3, valve rod 4, gland 5, double-screw bolt 6, screw 7, spheroid 3 is arranged in valve body 1, valve gap 2 is connected with valve body 1 by double-screw bolt 6, gland 5 is connected with valve body 1 by screw 7, valve rod 4 is fastened in gland 5, valve rod 4 bottoms are connected with spheroid 3 tops, between gland 5 and valve body 1, be provided with the compound seal layer between valve gap 2 and valve body 1, be provided with the first nut 8 on double-screw bolt 6, be provided with resilient pad 9 between the first nut 8 and valve gap 2 and on screw 7.The setting of compound seal layer, make between gland 5 and valve body 1 and between valve gap 2 and valve body 1 and have two-layer sealing, guaranteed between gland 5 and valve body 1 and the sealability between valve gap 2 and valve body 1; The setting of resilient pad 9, in order to give between valve gap 2 and valve body 1 and to provide pretightening force between gland 5 and valve body 1, make Sealing between valve gap 2 and valve body 1 and the Sealing between gland 5 and valve body 1 not there will be seepage.
Wherein, compound seal layer between gland 5 and valve body 1 comprises the annular spirotallic gasket 11 of the first spring energy-storage seal ring 10, first, gland 5 has two-layer stepped the first draw-in groove 12 with the surface of contact of valve body 1, the first spring energy-storage seal ring 10 is arranged near on stepped first draw-in groove 12 of spheroid 3, and the first annular spirotallic gasket 11 is arranged on stepped the first draw-in groove 12 away from spheroid 3; Compound seal layer between valve gap 2 and valve body 1 comprises the annular spirotallic gasket 18 of the second spring energy-storage seal ring 17, second, valve gap 2 all has two-layer stepped the second draw-in groove 19 with the surface of contact of valve body 1, the second spring energy-storage seal ring 17 is arranged near on stepped second draw-in groove 19 of spheroid 3, and the second annular spirotallic gasket 18 is arranged on stepped the second draw-in groove 19 away from spheroid 3.The first spring energy-storage seal ring 10, the second spring energy-storage seal ring 17 all is comprised of polymeric material capsul and corrosion resistant stainless steel metal spring, the first spring energy-storage seal ring 10 is arranged near in stepped first draw-in groove 12 of spheroid 3, the second spring energy-storage seal ring 17 is arranged near on stepped second draw-in groove 19 of spheroid 3, each metal spring pressurized, form outside tension force, impel sealing lip to be close to stepped first draw-in groove 12 corresponding with it, the second draw-in groove 19, because metal spring forever provides elastic force to sealing lip, can make up the bias of capsul wearing and tearing and mating parts, sealing in forming thus from the vacuum to the low pressure range, system pressure meeting secondary spring accumulation of energy in addition, pressure is larger, it is more abundant that sealing lip and groove are fitted, form thus high pressure sealing.Capsul is that high performance polymeric material is machined makes by PTFE, Filled PTEF, PEEK, filling PEEK, PVDF, PPS or other, material has determined that the spring energy-storage seal ring is applicable to from-268 ℃ to+427 ℃ in temperature range, guarantees that low temperature environment also can have good sealing effect.The annular spirotallic gasket 18 of the first annular spirotallic gasket 11, second is all to consist of SS304 stainless steel and Expanded graphite.
The length of gland 5 requires the different different length that adopts according to cryogenic temperature, and the ball valve in the present embodiment is at-196 ℃ of temperature, and the length of gland 5 is 200mm, and gland 5 adopts elongate structure, can prevent that stuffing box from freezing, and causes seal failure.
Be provided with relief hole on the spheroid 3 of the present embodiment.When ball valve is closed, can prevent that medium residual in ball valve from, because the be rapidly heated gasification, pressure of the relatively-high temperature of surrounding environment sharply raises, the problems such as seal leakage, fastening piece inefficacy occurring.
Above mode of execution is only explanation technical conceive of the present utility model and characteristics; its purpose is to allow the person skilled in the art understand content of the present utility model and implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed in protection domain of the present utility model.
Claims (5)
1. a compound seal low temperature floating ball valve, it comprises valve body, valve gap, spheroid, valve rod, gland, double-screw bolt, screw, described spheroid is arranged in valve body, described valve gap is connected with valve body by double-screw bolt, described gland is connected with valve body by screw, described valve rod is fastened in gland, described stem bottom is connected with the spheroid top, it is characterized in that: between described gland and valve body, be provided with the compound seal layer between described valve gap and valve body, be provided with the first nut on described double-screw bolt, between described the first nut and valve gap and be provided with resilient pad on screw.
2. compound seal low temperature floating ball valve according to claim 1, it is characterized in that: the compound seal layer between described gland and valve body comprises the first spring energy-storage seal ring, the first annular spirotallic gasket, the surface of contact of described gland and valve body has two-layer stepped the first draw-in groove, described the first spring energy-storage seal ring is arranged near on stepped first draw-in groove of spheroid, and the described first annular spirotallic gasket is arranged on stepped the first draw-in groove away from spheroid; Compound seal layer between described valve gap and valve body comprises the second spring energy-storage seal ring, the second annular spirotallic gasket, the surface of contact of described valve gap and valve body all has two-layer second-order scalariform draw-in groove, described the second spring energy-storage seal ring is arranged near on the second-order scalariform draw-in groove of spheroid, and the described second annular spirotallic gasket is arranged on the second-order scalariform draw-in groove away from spheroid.
3. compound seal low temperature floating ball valve according to claim 2, it is characterized in that: described gland inwall bottom is provided with groove, described stem lower portion outer wall is provided with projection, described projection is fastened in groove, gland is stretched out at described valve rod top, described valve rod upper end is provided with the second nut, dish spring, and described dish spring is between the second nut and gland.
4. compound seal low temperature floating ball valve according to claim 3, it is characterized in that: the length of described gland is 200mm.
5. compound seal low temperature floating ball valve according to claim 4, is characterized in that: on described spheroid, be provided with relief hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320405935.9U CN203374865U (en) | 2013-07-09 | 2013-07-09 | Combined seal low-temperature float ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320405935.9U CN203374865U (en) | 2013-07-09 | 2013-07-09 | Combined seal low-temperature float ball valve |
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| Publication Number | Publication Date |
|---|---|
| CN203374865U true CN203374865U (en) | 2014-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320405935.9U Expired - Fee Related CN203374865U (en) | 2013-07-09 | 2013-07-09 | Combined seal low-temperature float ball valve |
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| CN (1) | CN203374865U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265892A (en) * | 2014-09-17 | 2015-01-07 | 江苏亿阀集团有限公司 | Composite sealing ring for low-temperature valve |
| CN104455524A (en) * | 2014-09-30 | 2015-03-25 | 江苏亿阀集团有限公司 | Composite sealing low-temperature ball valve |
| CN104989842A (en) * | 2015-07-22 | 2015-10-21 | 雷蒙德(北京)科技股份有限公司 | Low-temperature ball valve |
| CN107654688A (en) * | 2017-08-24 | 2018-02-02 | 浙江威腾阀门有限公司 | Closed type controllable ball valve |
-
2013
- 2013-07-09 CN CN201320405935.9U patent/CN203374865U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265892A (en) * | 2014-09-17 | 2015-01-07 | 江苏亿阀集团有限公司 | Composite sealing ring for low-temperature valve |
| 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 |
| CN104989842A (en) * | 2015-07-22 | 2015-10-21 | 雷蒙德(北京)科技股份有限公司 | Low-temperature ball valve |
| CN107654688A (en) * | 2017-08-24 | 2018-02-02 | 浙江威腾阀门有限公司 | Closed type controllable ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20180709 |
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| CF01 | Termination of patent right due to non-payment of annual fee |