CN2826112Y - One-way check valve - Google Patents
One-way check valve Download PDFInfo
- Publication number
- CN2826112Y CN2826112Y CN 200520110641 CN200520110641U CN2826112Y CN 2826112 Y CN2826112 Y CN 2826112Y CN 200520110641 CN200520110641 CN 200520110641 CN 200520110641 U CN200520110641 U CN 200520110641U CN 2826112 Y CN2826112 Y CN 2826112Y
- Authority
- CN
- China
- Prior art keywords
- valve
- bin
- outlet
- sealing surface
- utility
- 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
Links
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- Check Valves (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The utility model relates to a one-way check valve which comprises a valve body. The utility model is characterized in that an inlet bin communicated with a water inlet, an outlet bin communicated with a water outlet, a valve handle and the sealing surface of a circulating mouth are arranged in the valve body, and the liquid enters the inlet bin to pass through the circulating mouth and the outlet bin; when the liquid flows back to pass through the circulating mouth between the outlet bin and the inlet bin, the pressure of the inlet bin is reduced, the pressure of the outlet bin is constant, the valve handle is in contact with the sealing surface of the circulating mouth under the push of the liquid flowing back to the outlet bin to close and cut off the reverse-flowing liquid of a pipeline. The one-way check valve can be closed manually; a hand wheel is clockwise rotated, a valve rod is moved downwards through screw threads on the valve rod and inner screw threads at the upper part, and the valve handle and the sealing surface of the circulating mouth are contacted to close the utility model. The hand wheel is counterclockwise rotated to make the valve rod move upwards, the valve handle is separated from the sealing surface of the circulating mouth under the liquid pressure and the push of a spring, and then the one-way check valve is in an open state.
Description
Technical field
The utility model relates to the valve of a kind of water, gas, oil, and is a kind of specifically when water, gas, the oily unidirectional screw down nonreturn valve that flows backwards of preventing after by this valve.
Background technique
Pressure in the pipeline of the feed water system of boiler generally need be higher than more than the twice of boiler pressure.Two valves of stop valve and safety check all are housed on the outlet of water pump and the watering pipeline of boiler, prevent because of once have a power failure or break down and prevent that boiler water, gas from flowing backwards in the promotion of boiler pressure, guarantee boiler not because of lack of water has an accident, just by dress stop valve and safety check.
Summary of the invention
The purpose of this utility model provides the dual-purpose unidirectional screw down nonreturn valve of an a kind of valve, replaces the effect of stop valve and safety check.The air water that prevents boiler flows backwards.
The purpose of this utility model realizes in this case, it comprises valve body, it is characterized in that in valve body, being provided with import storehouse, the outlet storehouse of water outlet and the sealing surface of communication port that connects water intake, the outlet storehouse is provided with the valve handle of slip, when liquid flows backwards under the promotion of pressure with valve handle and circulation actinal surface contact seal throttle down, the valve rod that links to each other with valve handle can make valve handle move down by handwheel and the actinal surface that circulates contacts throttle down cuts off the medium in the pipeline, makes liquid can not pass through valve body.
When move on the valve handle open after, valve handle is subjected to the impact of medium, for preventing that valve handle swing at the valve handle import Cang Chu that links to each other, is provided with the stabilization that spring plays valve handle.Handwheel moves to being rotated counterclockwise on the valve rod, and valve handle leaves the circulation actinal surface under the promotion of medium, and this valve is in open mode, the handwheel that the turns clockwise actinal surface contact seal face that valve handle can be moved down and circulate, and this valve is in closed condition.
The utility model has the advantages that a stop valve and safety check constitute one, save material, function does not subtract, and is a kind of two function model utility valves.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail with enforcement below in conjunction with accompanying drawing.
By accompanying drawing as can be known the utility model mainly comprise by shell 7 and upper case 5 and top seal material the 10, the 11st, upper and lower sealed faying face sealing material; The valve body that differential 9, the bolt 6 of going up the lower casing connection, differential bolt 4, handwheel 1, the tight nut 2 of the back of the body constitute.In valve body, be provided with the outlet storehouse 8 of import storehouse 14, the connecting pipeline of connecting pipeline, between import storehouse and outlet storehouse, be provided with communication port sealing surface 15, above have flow rate adjustable valve handle 12, on valve, be provided with handwheel 1, adjustable valve bar 3, in the import storehouse, be provided with the sealing that contacts of spring 13 and valve handle 12; Moving on the valve handle 12 under the promotion of medium and spring when moving on the valve rod 3, making medium pass through communication port sealing surface 15.When medium flows backwards by outlet storehouse 8, through circulation actinal surface 15; During import storehouse 14, will produce thrust to valve handle 12; Medium with circulation actinal surface 15 and the backflow of valve handle 12 contact cuts.
Claims (2)
1, a kind of unidirectional screw down nonreturn valve, it comprises valve body, it is characterized in that, is provided with import storehouse and the outlet storehouse that is communicated with water outlet and the sealing surface of communication port that is communicated with water intake at valve body, is provided with the valve handle that links to each other and be free to slide with valve rod in the outlet storehouse.
2, unidirectional screw down nonreturn valve according to claim 1 is characterized in that having the spring that links to each other with valve handle in valve body import storehouse with the communication port sealing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520110641 CN2826112Y (en) | 2005-06-24 | 2005-06-24 | One-way check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520110641 CN2826112Y (en) | 2005-06-24 | 2005-06-24 | One-way check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2826112Y true CN2826112Y (en) | 2006-10-11 |
Family
ID=37066298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520110641 Expired - Fee Related CN2826112Y (en) | 2005-06-24 | 2005-06-24 | One-way check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2826112Y (en) |
-
2005
- 2005-06-24 CN CN 200520110641 patent/CN2826112Y/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 | ||
| 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 |