CN2703925Y - Low-temp. stop valve - Google Patents
Low-temp. stop valve Download PDFInfo
- Publication number
- CN2703925Y CN2703925Y CN 200420027443 CN200420027443U CN2703925Y CN 2703925 Y CN2703925 Y CN 2703925Y CN 200420027443 CN200420027443 CN 200420027443 CN 200420027443 U CN200420027443 U CN 200420027443U CN 2703925 Y CN2703925 Y CN 2703925Y
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- CN
- China
- Prior art keywords
- valve
- gland
- low
- pressed
- runddichtringo
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- Expired - Fee Related
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Abstract
The utility model discloses a low-temperature liquid gas storage equipment and a relative low-temperature stop valve for the pipe. The low-temperature cut-off valve is mainly composed of a valve body provided with a valve cover, a hand wheel is fixed mounted on a valve lever, and the valve lever is matched with the valve cover by a screw thread; a valve core is fixed at the lower end of the valve lever, and the valve lever sleeve is fixed with the valve cover; the pressing nut is matched with the valve lever by the screw thread, and the pressing nut is pressed on the press sleeve; the press sleeve makes the V-shaped sealing ring pressed on the check ring which is between the valve lever and the valve lever sleeve. The low-temperature stop valve is characterized in that a slotted hole is arranged in the press sleeve, an O-shaped sealing ring is provided with the slotted hole, and the O-shaped sealing ring is adpressed with the surface of the valve lever. The structure of the low-temperature stop valve has the advantages of good sealing effect.
Description
Technical field
The utility model relates to a kind of warehousing and transportation facilities of liquefied gas at low temp and cryogenic globe valve door in the associated pipe of being applied to.
Background technique
The cryogenic globe valve door is mainly used in the warehousing and transportation facilities and associated pipe of liquid oxygen, liquid argon, liquid nitrogen and LNG Liquefied natural gas liquefied gas at low temp such as (LNG), as low-temperature pressure containers such as basin, tank car, tank containers, mainly the liquefied gas at low temp in the low-temperature pressure container pipeline mobile played the opening and closing effect.This valve requirement switch under low temperature (196 ℃) state is smooth and easy, does not have and leaks.The structure of tradition cryogenic globe valve door mainly comprises: valve body, valve gap is installed on the valve body, handwheel is fixedly mounted on the valve rod, valve rod matches with valve gap by screw thread, spool is fixed on the lower end of valve rod, and valve stem casing and valve gap fix, and gland nut matches with valve stem casing by screw thread, gland nut is pressed on the gland, and gland is pressed in " V " RunddichtringO on the back-up ring between valve rod and the valve stem casing.Come rotation valve rod by rotation hand wheel, and can drive spool and move up and down, thereby realize opening or closing the purpose of valve.The shortcoming of the cryogenic globe valve door of said structure is: when the valve access times too much, perhaps be subjected under the situation of low temperature effect overlong time, permanent deformation can take place and lose part elasticity in " V " RunddichtringO, between valve rod and " V " RunddichtringO, form micro-gap, thereby cause micro-leakage, this leakage is more obvious in the rotation process of valve rod.So the client is in use for some time, constantly be wrenched gland nut and make gland constantly compress " V " RunddichtringO, impel " V " RunddichtringO to keep the better seal state; Do not only very bothering like this, and sealing effect is not satisfactory.
Summary of the invention
At the problems referred to above, the utility model will provide a kind of sealing effect better cryogenic globe valve door.
For achieving the above object, the technical solution adopted in the utility model is: described cryogenic globe valve door, mainly comprise: valve body, valve gap are installed on the valve body, and handwheel is fixedly mounted on the valve rod, valve rod matches with valve gap by screw thread, spool is fixed on the lower end of valve rod, and valve stem casing and valve gap fix, and gland nut matches with valve stem casing by screw thread, gland nut is pressed on the gland, and gland is pressed in " V " RunddichtringO on the back-up ring between valve rod and the valve stem casing; Be characterized in: offer slotted eye in gland, be provided with " O " RunddichtringO in the slotted eye, " O " RunddichtringO is close to stem surface.
The further technological scheme of the utility model is: also be provided with spring between gland nut and gland, spring is pressed on the gland.
The utility model has the advantages that: use cryogenic globe valve door described in the utility model, have the effect of better sealing.
Description of drawings
Fig. 1 is the structural representation of cryogenic globe valve door described in the utility model;
Fig. 2 is the structure for amplifying schematic representation of the B part among Fig. 1.
Mode of execution
Below in conjunction with the drawings and specific embodiments technological scheme described in the utility model and working principle thereof and advantage are further described.
As shown in Figure 1 and Figure 2, cryogenic globe valve door described in the utility model, mainly comprise: valve body 8, valve gap 6 are installed on the valve body 8, and handwheel 1 is fixedly mounted on the valve rod 4, valve rod 4 matches with valve gap 6 by screw thread, spool 7 is fixed on the lower end of valve rod 4, and valve stem casing 5 fixes with valve gap 6, and gland nut 2 matches with valve stem casing 5 by screw thread, gland nut 2 is pressed on the gland 9, and gland 9 is pressed in " V " RunddichtringO 12 on the back-up ring 3 between valve rod 4 and the valve stem casing 5; Be characterized in: offer slotted eye in gland 9, be provided with " O " RunddichtringO 11 in slotted eye, " O " RunddichtringO 11 is close to valve rod 4 surfaces.The cryogenic globe valve door of said structure is identical with the using method of the cryogenic globe valve door of conventional construction; Its difference is: owing to be provided with " O " RunddichtringO 11, therefore has better seal between " O " RunddichtringO 11 and the valve rod 4, the sealing configuration that this sealing configuration constitutes original " V " RunddichtringO 12 has carried out effectively replenishing, and therefore whole cryogenic globe valve door has just had good sealing effect.In actual fabrication, can also between gland nut 2 and gland 9, be provided with spring 10, spring 10 is pressed on the gland 9.Like this, gland 9 remains certain pressure to " V " RunddichtringO 12, makes between " V " RunddichtringO 12 and the valve rod 4 and remains the better seal state, and whole valve just has better sealing effect.
Claims (2)
1, cryogenic globe valve door, mainly comprise: valve body, valve gap is installed on the valve body, handwheel is fixedly mounted on the valve rod, and valve rod matches with valve gap by screw thread, and spool is fixed on the lower end of valve rod, valve stem casing and valve gap fix, gland nut matches with valve stem casing by screw thread, and gland nut is pressed on the gland, and gland is pressed in " V " RunddichtringO on the back-up ring between valve rod and the valve stem casing; It is characterized in that: offer slotted eye in gland, be provided with " O " RunddichtringO in the slotted eye, " O " RunddichtringO is close to stem surface.
2, cryogenic globe valve door according to claim 1 is characterized in that: also be provided with spring between gland nut and gland, spring is pressed on the gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420027443 CN2703925Y (en) | 2004-05-28 | 2004-05-28 | Low-temp. stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420027443 CN2703925Y (en) | 2004-05-28 | 2004-05-28 | Low-temp. stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2703925Y true CN2703925Y (en) | 2005-06-08 |
Family
ID=34771655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420027443 Expired - Fee Related CN2703925Y (en) | 2004-05-28 | 2004-05-28 | Low-temp. stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2703925Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588616A (en) * | 2012-03-09 | 2012-07-18 | 浙江师范大学 | Stop valve for low-temperature liquid containers and assembling method thereof |
| CN104141803A (en) * | 2013-05-08 | 2014-11-12 | 上海沪东造船阀门有限公司 | Ultralow-temperature stop valve suitable for liquified natural gas carrier |
| CN110566679A (en) * | 2019-09-24 | 2019-12-13 | 张家港富瑞阀门有限公司 | Stop valve for hydrogen |
-
2004
- 2004-05-28 CN CN 200420027443 patent/CN2703925Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588616A (en) * | 2012-03-09 | 2012-07-18 | 浙江师范大学 | Stop valve for low-temperature liquid containers and assembling method thereof |
| CN102588616B (en) * | 2012-03-09 | 2015-03-11 | 秦立臣 | Stop valve for low-temperature liquid containers and assembling method thereof |
| CN104141803A (en) * | 2013-05-08 | 2014-11-12 | 上海沪东造船阀门有限公司 | Ultralow-temperature stop valve suitable for liquified natural gas carrier |
| CN110566679A (en) * | 2019-09-24 | 2019-12-13 | 张家港富瑞阀门有限公司 | Stop valve for hydrogen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |