CN201314391Y - Low temperature ball valve - Google Patents
Low temperature ball valve Download PDFInfo
- Publication number
- CN201314391Y CN201314391Y CNU2008202178437U CN200820217843U CN201314391Y CN 201314391 Y CN201314391 Y CN 201314391Y CN U2008202178437 U CNU2008202178437 U CN U2008202178437U CN 200820217843 U CN200820217843 U CN 200820217843U CN 201314391 Y CN201314391 Y CN 201314391Y
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- CN
- China
- Prior art keywords
- valve
- valve rod
- hole
- seat
- stuffing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Details Of Valves (AREA)
Abstract
The utility model discloses a low temperature ball valve which can raise the position of a leakproof structure between a valve rod and a valve seat and can release pressure. The low temperature ball valve comprises the valve seat, wherein, a valve cavity, a liquid inlet, a liquid outlet and a valve rod mouth are arranged in the valve seat; the liquid inlet, the liquid outlet and the valve rod mouth are communicated with the valve cavity; a valve core is arranged in the valve cavity; the valve seat is provided with a connecting pipe which is communicated with the valve rod mouth; a connecting seat is arranged on the top of the connecting pipe; a packing hole which is concentric with the valve rod mouth is arranged in the connecting seat; the valve rod which is connected with the valve core penetrates through the connecting pipe and a valve rod hole; a packing leakproof device is arranged between the valve rod and the packing hole; and a pressure release mouth which is communicated with the valve rod hole is arranged below the packing leakproof structure on the connecting seat. The ball valve is particularly suitable for various low-temperature pipelines.
Description
Technical field
The utility model relates to ball valve, refers more particularly to the cryogenic ball valve that is used to contain on liquid storage oxygen, liquid argon, liquid nitrogen and the LNG Liquefied natural gas low-temperature pressure containers such as (LNG).
Background technique
At present, the open-shut device of ball valve is a spheroid, utilizes spheroid to follow valve rod to realize the purpose of opening and closing around the axis half-twist of valve rod.Ball valve is mainly used in cut-out, distributes and changes the media flow direction on pipeline, its major advantage has: 1. have minimum flow resistance; 2. because of the time can not block (at unlubricated dose time) in work, so can be applied in Korrosionsmedium and the low-boiling point liquid reliably; 3. in bigger pressure and temperature scope, can realize sealing fully; 4. can realize fast opening and closing, operation does not have impact; 5. spherical closure member can be located on boundary position automatically; 6. working medium seals reliably on two-sided; 7. when standard-sized sheet and full cut-off, therefore the sealing surface of spheroid and valve seat and media isolated can not cause the erosion of sealing surface at a high speed by the medium of valve; 8. compact structure, in light weight can think that it is the most rational valve mechanism that is used for the cryogenic media system; 9. the valve body symmetry can be born the stress from pipeline well; 10. closure member can bear the High Pressure Difference when cutting out, and can reach 30 years working life the highest, is the optimal valve of oil, natural gas line.Although the ball valve advantage is a lot, when using it for cryogenic piping, also exist some not enough: 1. cryogenic piping all will install the cold insulation facility additional usually, and the short stem structure of ball valve obviously can not satisfy the requirement of installing the cold insulation facility to ball valve additional; 2. when using it for cryogenic piping, after ball valve was closed, valve pocket was a confined space, after the cryogenic liquide gasification, can make the pressure of valve pocket sharply rise, because ball valve does not have the pressure release function, ball valve can be caused danger because of superpressure.3. because the packing seal structure between valve rod and the valve seat is close to spool, the pressure that sharply rises in cryogenic liquide gasification back can impact to packing seal structure, causes filler to lose efficacy, and has shortened its working life greatly.
The model utility content
A technical problem to be solved in the utility model is: a kind of position of improving the sealing configuration between valve rod and the valve seat and cryogenic ball valve that can pressure release are provided.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: cryogenic ball valve, comprise: valve seat, be provided with valve pocket and the liquid entering hole that communicates with valve pocket, liquid outlet and valve stem port in the valve seat, be provided with spool in the valve pocket, described valve seat is provided with the connecting tube that communicates with valve stem port, the top of connecting tube is provided with connecting base, be provided with the valve rod hole that connects with connecting tube and the stuffing hole concentric in the connecting base with valve rod hole, the valve rod that links to each other with spool is located in connecting tube and the valve rod hole, is provided with stuffing seal between valve rod and the stuffing hole; Below stuffing seal, locate to be provided with the pressure relief opening that communicates with valve rod hole at described connecting base.
Described stuffing seal comprises: be sleeved on the upper and lower packing ring on the valve rod, be provided with filler between upper and lower packing ring, lower gasket is resisted against on the boss of stuffing hole bottom, and upper gasket is pressed on the filler by locking nut and holddown spring.
The beneficial effects of the utility model are: the utility model is by being provided with connecting tube and connecting base, and valve rod has extended, make that installing the cold insulation device additional becomes very convenient, and make stuffing seal away from valve pocket, and pressure relief opening is the rapid pressure that rises in venting cryogenic liquide gasification back well, make whole ball valve to work safely and reliably, but also avoided stuffing seal to be impacted, prolonged its working life.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Among the figure: 1, valve seat, 11, liquid entering hole, 12, liquid outlet, 13, valve stem port, 2, spool, 3, connecting tube, 4, connecting base, 41, pressure relief opening, 42, mountion plate, 43, valve rod hole, 44, boss, 5, valve rod, 6, upper gasket, 7, lower gasket, 8, holddown spring, 9, filler, 10, locking nut, 11, drive unit.
Embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present utility model in detail.
As shown in Figure 1, cryogenic ball valve described in the utility model, comprise: valve seat 1, the liquid entering hole 11 that is provided with valve pocket in the valve seat 1 and communicates with valve pocket, liquid outlet 12 and valve stem port 13, be provided with spool 2 in the valve pocket, described valve seat 1 is provided with the connecting tube 3 that communicates with valve stem port 13, the top of connecting tube 3 is provided with connecting base 4, be provided with the valve rod hole 43 that connects with connecting tube 3 in the connecting base 4, and the stuffing hole concentric with valve rod hole 43---valve rod hole 43 forms shoulder hole with stuffing hole, the valve rod 5 that links to each other with spool 2 is located in connecting tube 3 and the valve rod hole 43, be provided with stuffing seal between valve rod 5 and the stuffing hole, its structure comprises: be sleeved on the valve rod 5 on, lower gasket 6 and 7, last, be provided with filler 9 between the lower gasket 6 and 7, lower gasket 7 is resisted against on the boss 44 of stuffing hole bottom, and upper gasket 6 is pressed on the filler 9 by locking nut 10 and holddown spring 8; Boss 44 below described connecting base 4 stuffing seals is provided with the pressure relief opening 41 that communicates with valve rod hole 43.When practical application, described pressure relief opening 41 can discharge by the attachment security valve automatically, also can connect the needle value manual drain; The top of described connecting base 4 also is provided with mountion plate 42, is connected with drive unit 11 on the mountion plate 42, and this drive unit 11 can be equipment such as cylinder or motor, thereby can realize the telecontrol to above-mentioned ball valve.
Claims (2)
1. cryogenic ball valve, comprise: valve seat, be provided with valve pocket and the liquid entering hole that communicates with valve pocket, liquid outlet and valve stem port in the valve seat, be provided with spool in the valve pocket, it is characterized in that: described valve seat is provided with the connecting tube that communicates with valve stem port, the top of connecting tube is provided with connecting base, be provided with the valve rod hole that connects with connecting tube and the stuffing hole concentric in the connecting base with valve rod hole, the valve rod that links to each other with spool is located in connecting tube and the valve rod hole, is provided with stuffing seal between valve rod and the stuffing hole; Below stuffing seal, locate to be provided with the pressure relief opening that communicates with valve rod hole at described connecting base.
2. cryogenic ball valve as claimed in claim 1, it is characterized in that: described stuffing seal comprises: be sleeved on the upper and lower packing ring on the valve rod, between upper and lower packing ring, be provided with filler, lower gasket is resisted against on the boss of stuffing hole bottom, and upper gasket is pressed on the filler by locking nut and holddown spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202178437U CN201314391Y (en) | 2008-11-12 | 2008-11-12 | Low temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202178437U CN201314391Y (en) | 2008-11-12 | 2008-11-12 | Low temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201314391Y true CN201314391Y (en) | 2009-09-23 |
Family
ID=41126185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202178437U Expired - Lifetime CN201314391Y (en) | 2008-11-12 | 2008-11-12 | Low temperature ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201314391Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793330A (en) * | 2010-04-14 | 2010-08-04 | 玉环县华龙阀门有限公司 | Venting ball valve |
| CN102926009A (en) * | 2011-08-13 | 2013-02-13 | 苏州敏喆机械有限公司 | Novel freezing valve |
-
2008
- 2008-11-12 CN CNU2008202178437U patent/CN201314391Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793330A (en) * | 2010-04-14 | 2010-08-04 | 玉环县华龙阀门有限公司 | Venting ball valve |
| CN102926009A (en) * | 2011-08-13 | 2013-02-13 | 苏州敏喆机械有限公司 | Novel freezing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090923 |