CN204253893U - A kind of thermal power plant blowdown high temperature and high pressure cut-off valve - Google Patents
A kind of thermal power plant blowdown high temperature and high pressure cut-off valve Download PDFInfo
- Publication number
- CN204253893U CN204253893U CN201420721054.2U CN201420721054U CN204253893U CN 204253893 U CN204253893 U CN 204253893U CN 201420721054 U CN201420721054 U CN 201420721054U CN 204253893 U CN204253893 U CN 204253893U
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- China
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- valve
- flange
- spool
- groove
- face
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Abstract
A kind of thermal power plant blowdown high temperature and high pressure cut-off valve, comprise valve body (1), valve gap (2), spool (3) and valve rod (4), it is characterized in that: that side wall surface being provided with valve port (8) of described valve pocket (5) offers a circle groove (9) around the periphery of valve port (8), and around being circumferentially with a circle flange (10) on described spool (3) end face, this flange (10) is relative with groove (9), flange (10) embeds groove (9), is provided with seal ring and is sealed and matched between the end face of flange (10) and the bottom land of groove (9); Region on described spool (3) end face in described flange (10) is as the intake pressure prevent surface (11) be covered on valve port (8).The utility model reduces and washes away pressure into water to sealing surface, makes greatly to reduce into the collapsing force of the granule foreign in water to sealing surface, thus very effectively extends the working life of valve.
Description
Technical field
The utility model relates to valve field, is specifically related to the high temperature and high pressure cut-off valve of thermal power plant blowdown.
Background technique
Heat power plant boiler needs timing blowdown, and because the water in boiler is High Temperature High Pressure, the valve that blowoff line connects must be high temperature and high pressure cut-off valve.
High temperature and high pressure cut-off valve, primarily of valve body, valve gap, spool and valve rod composition, valve body is provided with valve pocket, and spool is arranged in valve pocket, stretch into valve pocket in the through hole that valve rod is set from valve gap and act on spool, making spool coordinate with the valve port on valve body thus form and open and close two states.Existing high temperature and high pressure cut-off valve, its spool is all taper type or spherical, this taper type or spherical spool extend valve port place and directly contact with valve port using its conical surface or sphere as the face of being sealed and matched and coordinate, intake the face that is sealed and matched directly washed away on spool, owing to being that blowdown uses, with graininess impurity in its water inlet, use the face that is sealed and matched of a period of time back valve core namely can be worn down to the cellular of hole, hole point point, causing the face sealing variation that is sealed and matched, there is leakage situation in valve.
Summary of the invention
The purpose of this utility model is to provide a kind of thermal power plant blowdown high temperature and high pressure cut-off valve, is easily affected the problem in working life by water inlet erosive wear to solve spool that prior art exists is sealed and matched face.
For achieving the above object, the technical solution adopted in the utility model is: a kind of thermal power plant blowdown high temperature and high pressure cut-off valve, comprises valve body, valve gap, spool and valve rod, establish valve pocket in valve body, valve body is also provided with import and outlet; Described spool to be located in valve pocket and by valve rod connecting band action straight line motion; The corresponding spool in described valve pocket one end is provided with the valve port coordinated with it; That side wall surface being provided with valve port of described valve pocket offers a circle groove around the periphery of valve port, and around being circumferentially with a circle flange on described spool end, this flange is relative with groove, and flange embeds groove, is provided with seal ring and is sealed and matched between the end face of flange and the bottom land of groove; Further, described valve port is through expanding channels import, and valve pocket separately exports through expanding channels; With this, the region on described spool end in described flange is as the intake pressure prevent surface be covered on valve port.
The utility model design principle and effect are:
Face that the spool that the utility model exists for prior art is sealed and matched easily is affected the problem in working life by water inlet erosive wear, brand-new design has been carried out to the structure at spool and valve port place, specifically spool and valve port are designed to flange and groove fit formula, after the sewage that import is entered first is subject to the stop of intake pressure prevent surface, flow through flange and groove in bending mode to be again sealed and matched and to locate, reduce and into water pressure is washed away to sealing surface, make greatly to reduce into the collapsing force of the granule foreign in water to sealing surface, thus very effectively extend the working life of valve.
Accompanying drawing explanation
Fig. 1 is the utility model example structure schematic diagram.
In above accompanying drawing: 1, valve body; 2, valve gap; 3, spool; 4, valve rod; 5, valve pocket; 6, import; 7, export; 8, valve port; 9, groove; 10, flange; 11, intake pressure prevent surface.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described:
Embodiment: shown in Figure 1:
A kind of thermal power plant blowdown high temperature and high pressure cut-off valve, shown in Figure 1, comprise valve body 1, valve gap 2, spool 3 and valve rod 4, in valve body 1, establish valve pocket 5, valve body 1 is also provided with import 6 and outlet 7.Described spool 3 to be located in valve pocket 5 and by valve rod 4 connecting band action straight line motion; The corresponding spool 3 in described valve pocket 5 one end is provided with the valve port 8 coordinated with it.
The core of the present embodiment is: shown in Figure 1, and that side wall surface being provided with valve port 8 of described valve pocket 5 offers a circle groove 9 around the periphery of valve port 8, and this circle groove 9 is arranged around the center of valve port 8, and separated by a distance with valve port 8.In other words, that side wall surface being provided with valve port 8 of described valve pocket 5 is formed the round platform of a protuberance, and valve port 8 is the centers being opened in this round platform.Around being circumferentially with a circle flange 10 on described spool 3 end face, this flange 10 is relative with groove 9, and flange 10 embeds groove 9, is provided with seal ring and is sealed and matched between the end face of flange 10 and the bottom land of groove 9; Further, described valve port 8 is through expanding channels import 6, and valve pocket 5 is separately through expanding channels outlet 7; With this, the region on described spool 3 end face in described flange 10 is as the intake pressure prevent surface 11 be covered on valve port 8.
During the present embodiment work, after the sewage that import enters first is subject to the stop of intake pressure prevent surface 11, flow through flange 10 in bending mode to be again sealed and matched with groove 9 and to locate, reduce and into water pressure is washed away to sealing surface, make greatly to reduce into the collapsing force of the granule foreign in water to sealing surface, thus very effectively extend the working life of valve.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (1)
1. a thermal power plant blowdown high temperature and high pressure cut-off valve, comprises valve body (1), valve gap (2), spool (3) and valve rod (4), establishes valve pocket (5) in valve body (1), valve body (1) is also provided with import (6) and outlet (7); Described spool (3) to be located in valve pocket (5) and by valve rod (4) connecting band action straight line motion; The corresponding spool (3) in described valve pocket (5) one end is provided with the valve port (8) coordinated with it; It is characterized in that: that side wall surface being provided with valve port (8) of described valve pocket (5) offers a circle groove (9) around the periphery of valve port (8), and around being circumferentially with a circle flange (10) on described spool (3) end face, this flange (10) is relative with groove (9), flange (10) embeds groove (9), is provided with seal ring and is sealed and matched between the end face of flange (10) and the bottom land of groove (9); Further, described valve port (8) is through expanding channels import (6), and valve pocket (5) is separately through expanding channels outlet (7); With this, the region on described spool (3) end face in described flange (10) is as the intake pressure prevent surface (11) be covered on valve port (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721054.2U CN204253893U (en) | 2014-11-26 | 2014-11-26 | A kind of thermal power plant blowdown high temperature and high pressure cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420721054.2U CN204253893U (en) | 2014-11-26 | 2014-11-26 | A kind of thermal power plant blowdown high temperature and high pressure cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204253893U true CN204253893U (en) | 2015-04-08 |
Family
ID=52958201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420721054.2U Expired - Fee Related CN204253893U (en) | 2014-11-26 | 2014-11-26 | A kind of thermal power plant blowdown high temperature and high pressure cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204253893U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018223587A1 (en) * | 2017-06-09 | 2018-12-13 | 四川行之智汇知识产权运营有限公司 | Drainage valve for nuclear power station |
-
2014
- 2014-11-26 CN CN201420721054.2U patent/CN204253893U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018223587A1 (en) * | 2017-06-09 | 2018-12-13 | 四川行之智汇知识产权运营有限公司 | Drainage valve for nuclear power station |
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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: 20150408 Termination date: 20181126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |