CN203717937U - Anti-backflow block valve - Google Patents
Anti-backflow block valve Download PDFInfo
- Publication number
- CN203717937U CN203717937U CN201320835321.4U CN201320835321U CN203717937U CN 203717937 U CN203717937 U CN 203717937U CN 201320835321 U CN201320835321 U CN 201320835321U CN 203717937 U CN203717937 U CN 203717937U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- outer sleeve
- block
- communicated
- 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 - Fee Related
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- Valve Housings (AREA)
Abstract
The utility model discloses an anti-backflow block valve. The anti-backflow block valve comprises a valve body, wherein a valve inlet is communicated to the upper part of one side of the valve body; a valve outlet is communicated to the bottom of the valve body; a valve cover is arranged at the top of the valve body; a diameter enlargement part is arranged at the upper part of the valve outlet; a valve rod is vertically and slidingly arranged in the valve cover; the bottom end of the valve rod enters into the valve body and is connected with an end cap; an external sleeve sleeved outside the valve rod is vertically and slidingly arranged in the valve cover; the bottom end of the external sleeve enters into the valve body and is connected with a pressing base; the upper part of the external sleeve extends to the valve cover; the external wall of the external sleeve is shaped with an external thread, and the external sleeve extends to the upper part of the valve cover and is threaded with locking nuts. The anti-backflow block valve has excellent sealing performance; the blocking performance of the block valve is improved.
Description
Technical field
The utility model relates to block valve field, is specially a kind of block valve of anti-backflow.
Background technique
Block valve claims again cut-off valve, is widely used in pipeline in flowing medium transmission, and its effect is the flowing medium that blocks or connect in pipeline.The block valve of prior art often refluxes due to flowing medium in valve, causes poorly sealed close problem.
Model utility content
The purpose of this utility model is to provide a kind of block valve of anti-backflow, to solve the problem that in prior art block valve valve, flowing medium easily refluxes.
In order to achieve the above object, the technological scheme that the utility model adopts is:
A kind of block valve of anti-backflow, include valve body, valve body one upper lateral part is communicated with into valve port, valve body bottom is communicated with out valve port, valve body top is provided with valve gap, it is characterized in that: described in go out the inner chamber top being communicated with in valve port and valve body and be provided with wide diameter portion, in described valve gap, be vertically slidably fitted with the valve rod that points to out valve port, described valve rod bottom is stretched in valve body and is connected with shape and the plug that goes out valve port wide diameter portion form fit, and plug can block up out in valve port wide diameter portion, in valve gap, be also vertically slidably fitted with the outer sleeve being enclosed within outside valve rod, described outer sleeve bottom is stretched in valve body, and outer sleeve bottom is connected with and can be pressed in plug and the plug wedge on valve body bottom around, valve gap is stretched out on outer sleeve top, outer sleeve outer wall forms outside thread, and outer sleeve stretches out outside the top of valve gap and is screwed with locking nut.
The block valve of described a kind of anti-backflow, is characterized in that: described valve stem tip is stretched out from outer sleeve top.
During the utility model work, by valve rod, plug is blocked up out in valve port wide diameter portion, and by outer sleeve, pressure drop, plug is pressed in valve port wide diameter portion, then tighten locking nut pinning outer sleeve and can prevent because backflow causes plug and enters poorly sealed close problem between valve port wide diameter portion.The utlity model has good sealing, improved the ability of blocking of block valve.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
As shown in Figure 1.A kind of block valve of anti-backflow, include valve body 1, valve body 1 one upper lateral parts are communicated with into valve port 2, valve body 1 bottom is communicated with out valve port 3, valve body 1 top is provided with valve gap 4, go out valve port 3 and be provided with wide diameter portion with the interior inner chamber top being communicated with of valve body 1, in valve gap 4, be vertically slidably fitted with the valve rod 5 that points to out valve port 3, valve rod 5 bottoms are stretched in valve body 1 and are connected with shape and the plug 6 that goes out valve port 3 wide diameter portion form fit, and plug 6 can block up out in valve port 3 wide diameter portions, in valve gap 4, be also vertically slidably fitted with the outer sleeve 7 being enclosed within outside valve rod 5, outer sleeve 7 bottoms are stretched in valve body 1, and outer sleeve 7 bottoms are connected with and can be pressed in plug 6 and plug 6 wedge 8 on valve body 1 bottom around, valve gap 4 is stretched out on outer sleeve 7 tops, outer sleeve 7 outer walls form outside thread, and outer sleeve 7 stretches out outside the top of valve gap 4 and is screwed with locking nut 9.Stretch out from outer sleeve 7 tops on valve rod 5 tops.
Claims (2)
1. the block valve of an anti-backflow, include valve body, valve body one upper lateral part is communicated with into valve port, valve body bottom is communicated with out valve port, valve body top is provided with valve gap, it is characterized in that: described in go out the inner chamber top being communicated with in valve port and valve body and be provided with wide diameter portion, in described valve gap, be vertically slidably fitted with the valve rod that points to out valve port, described valve rod bottom is stretched in valve body and is connected with shape and the plug that goes out valve port wide diameter portion form fit, and plug can block up out in valve port wide diameter portion, in valve gap, be also vertically slidably fitted with the outer sleeve being enclosed within outside valve rod, described outer sleeve bottom is stretched in valve body, and outer sleeve bottom is connected with and can be pressed in the plug wedge of valve body bottom around, valve gap is stretched out on outer sleeve top, outer sleeve outer wall forms outside thread, and outer sleeve stretches out outside the top of valve gap and is screwed with locking nut.
2. the block valve of a kind of anti-backflow according to claim 1, is characterized in that: described valve stem tip is stretched out from outer sleeve top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320835321.4U CN203717937U (en) | 2013-12-17 | 2013-12-17 | Anti-backflow block valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320835321.4U CN203717937U (en) | 2013-12-17 | 2013-12-17 | Anti-backflow block valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203717937U true CN203717937U (en) | 2014-07-16 |
Family
ID=51157089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320835321.4U Expired - Fee Related CN203717937U (en) | 2013-12-17 | 2013-12-17 | Anti-backflow block valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203717937U (en) |
-
2013
- 2013-12-17 CN CN201320835321.4U patent/CN203717937U/en not_active Expired - Fee Related
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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: 20140716 Termination date: 20141217 |
|
| EXPY | Termination of patent right or utility model |