CN205136688U - Low resistance backflow preventer - Google Patents
Low resistance backflow preventer Download PDFInfo
- Publication number
- CN205136688U CN205136688U CN201520993060.8U CN201520993060U CN205136688U CN 205136688 U CN205136688 U CN 205136688U CN 201520993060 U CN201520993060 U CN 201520993060U CN 205136688 U CN205136688 U CN 205136688U
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- valve
- chamber
- water
- check valve
- hydathode
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Abstract
The utility model discloses a low resistance backflow preventer, including intaking check valve, drainer and play water check valve, the drainer comprises with the drain valve of lower part the right angle three way valve body on upper portion, the valve body about the go side rather than the check valve of intaking at both ends, go out the chamber same central line intercommunication of water check valve, the lower go side of valve body and the chamber of drain valve intercommunication, the intracavity of drain valve is established the valve clack and is divided into upward cavity of resorption, the below is equipped with the spring in the valve clack, the valve rod center of valve clack is established the intercommunicating pore intercommunication and is gone up the cavity of resorption, the cavity of resorption is equipped with the outlet, under separating to become, the drain valve bottom controls chamber and last control chamber, control the chamber communicates the check valve of intaking through the control valve of intaking import down, on control the chamber and pass through the return water control valve and communicate an export of water check valve, and the export that goes out the water check valve communicates the check valve control chamber that intakes through the return water control valve other end. The utility model discloses loss of pressure is little, and is water -tight when opening, and sealed reliable, the performance is good, and is longe -lived, energy -conserving effectual.
Description
Technical field
The utility model relates to valve field, is specifically related to a kind of low resistance force counter flow stop.
Background technique
Low resistance force counter flow stop in the market, has plenty of piston structure, opens dumb, easily blocks; Have plenty of plug-in hydathode, lumen water cannot drain; The closing forces of some water inlet safety check is only by spring, and not being that the pressure loss is large, is exactly that closing forces is little, it is unreliable to seal, leaking when going out hydathode when Water Check Valve outlet has pressure water supply start, when even stopping supplying water, also can leak when the import static pressure of water inlet safety check is slightly high.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of low resistance force counter flow stop, and the pressure loss is little, water-tight during unlatching, and sealing is reliable, and performance is good, and the life-span is long, good energy-conserving effect.
The utility model is achieved through the following technical solutions:
A kind of low resistance force counter flow stop, comprise into water safety check, hydathode and go out Water Check Valve, described hydathode is made up of the right-angle tee valve body on top and the drain valve of bottom, the go side, left and right of valve body and the water inlet safety check at its two ends, the same center line in chamber going out Water Check Valve is communicated with, the lower go side of valve body is communicated with the chamber of drain valve, flap is established to be divided into upper and lower cavity in the chamber of drain valve, in flap, below is provided with spring, the valve rod center of flap establishes intercommunicating pore to be communicated with upper and lower cavity, cavity of resorption is provided with drain opening, drain valve bottom is separated into lower control chamber and upper control chamber, lower control chamber is communicated with the import of water inlet safety check by water inlet control valve, upper control chamber is communicated with the outlet of Water Check Valve by backwater control pipe, and the outlet going out Water Check Valve is communicated with water inlet safety check control chamber by the backwater control pipe the other end.
The further improvement project of the utility model is, the flap cavity of resorption seal outer diameter of described drain valve is greater than the seal inner diameter of epicoele.
The utility model further improvement project is, described water inlet safety check is the streamlined safety check of straight-through type full-bore, and going out Water Check Valve is axial flow type check valve, and the valve body on hydathode top is wafer type.
The utility model further improvement project is, is provided with suspension ring above described hydathode.
The utility model compared with prior art, has following obvious advantage:
One, the utility model water inlet safety check adopts the airflow design of straight-through type full-bore, and go out Water Check Valve and adopt axial flow design, hydathode adopts wafer type, drain valve is in lower and top right angle three way valve body cavity accessibility designs, reduce fluid resistance, reduce the pressure loss, drainage effect is good.
Two, when normal water supply, the lower control chamber that the intake pressure P1 of water inlet safety check enters hydathode by water inlet control valve makes hydathode close together with spring, the outlet pressure P3 going out Water Check Valve enters the upper control chamber of hydathode by backwater control pipe, when stopping supplying water, all the time make hydathode be in opening state, let out the water in most hydathode upper valve body cavity.
Three, the flap of hydathode has the feature of initial sealing under the action of the spring, the phenomenon that when avoiding firm water supply start, hydathode leaks.
Four, the valve rod of hydathode is provided with intercommunicating pore, be communicated with the upper and lower cavity of flap, due to warp in the sealing that the flap cavity of resorption seal outer diameter of hydathode is greater than epicoele, when can make the flap of hydathode by pressure P 2 in upper body, increase the sealing force of flap, improve the reliability of hydathode sealing.
Five, the control chamber of water inlet safety check is communicated with the outlet going out Water Check Valve by backwater control pipe, achieve the closedown that backwater controls water inlet safety check automatically, ensure that the reliability into water check valve seal, reduce the spring rate into water safety check, reduce fluid resistance, good energy-conserving effect, and solve when going out hydathode leakage water problem when Water Check Valve has pressure water supply start.
Six, suspension ring are equipped with in the top of hydathode, are convenient to install.
Accompanying drawing explanation
Fig. 1 is the utility model structure sectional view.
Embodiment
As shown in Figure 1, the utility model comprises into water safety check 1, hydathode 2 and go out Water Check Valve 3, described hydathode 2 is made up of with the drain valve 22 of bottom the right-angle tee valve body 21 on top, the go side, left and right of valve body 21 and the water inlet safety check 1 at its two ends, the same center line in chamber going out Water Check Valve 3 is communicated with, the lower go side of valve body 21 is communicated with the chamber of drain valve 22, flap 23 is established to be divided into upper and lower cavity in the chamber of drain valve 22, in flap, below is provided with spring 24, valve rod 25 center of flap establishes intercommunicating pore 26 to be communicated with upper and lower cavity, cavity of resorption is provided with drain opening 27, drain valve bottom is separated into lower control chamber 28 and upper control chamber 29, lower control chamber 28 is communicated with the import of water inlet safety check 1 by water inlet control valve 4, upper control chamber 29 is communicated with the outlet of Water Check Valve 3 by backwater control pipe 5, go out Water Check Valve 3 chamber and be communicated with water inlet safety check control chamber 11 by the other end of backwater control pipe 5.
The flap cavity of resorption seal outer diameter of described drain valve 22 is greater than the seal inner diameter of epicoele.
Described water inlet safety check 1 is the streamlined safety check of straight-through type full-bore, and go out Water Check Valve 3 for axial flow type check valve, the valve body 21 on hydathode top is wafer type.
For the ease of installing, above described hydathode 2, be provided with suspension ring 20.
Working principle:
When the utility model initially supplies water, hydathode flap 23 is in closed condition under the spring force F1 effect of spring 24, first the water of water inlet check valve inlet enter the lower control chamber 28 of hydathode by water inlet control valve 4, increase the closing forces P1 of flap, then open into water safety check, enter in the chamber of hydathode top right-angle tee valve body, enter the water in hydathode chamber, first the closing forces F2 of the below increase flap of flap 23 is entered by intercommunicating pore 26 on the valve rod of hydathode, then open out Water Check Valve to supply water, the pressure P 3 simultaneously going out Water Check Valve enters the upper control chamber 29 of hydathode by backwater control pipe 5.Because when supplying water, P1 > P3, the following power of hydathode flap equals P1-P3+F1+F2 and is greater than sealing force, ensure that the reliability that hydathode seals.When stopping supplying water, P1 < P3, the following power of hydathode flap equals P3-P1+F1+F2 and is less than sealing force, makes the flap of hydathode be in opening state, the endoceliac water of valve of hydathode flows out from drain opening 27, ensure that hydathode can drain the good result of lumen water.Pressure of return water P3 is entered in water safety check control chamber 11 by the other end of backwater control pipe 5 simultaneously, ensure that the unfailing performance into water check valve seal.
Claims (4)
1. a low resistance force counter flow stop, comprise into water safety check (1), hydathode (2) and go out Water Check Valve (3), it is characterized in that: described hydathode (2) is made up of the right-angle tee valve body (21) on top and the drain valve (22) of bottom, the go side, left and right of valve body (21) and the water inlet safety check (1) at its two ends, the same center line in chamber going out Water Check Valve (3) is communicated with, the lower go side of valve body (21) is communicated with the chamber of drain valve (22), flap (23) is established to be divided into upper and lower cavity in the chamber of drain valve (22), in flap, below is provided with spring (24), valve rod (25) center of flap establishes intercommunicating pore (26) to be communicated with upper and lower cavity, cavity of resorption is provided with drain opening (27), drain valve bottom is separated into lower control chamber (28) and upper control chamber (29), lower control chamber (28) is communicated with the import of water inlet safety check (1) by water inlet control valve (4), upper control chamber (29) is communicated with the outlet of Water Check Valve (3) by backwater control pipe (5), and the outlet going out Water Check Valve (3) is communicated with water inlet safety check control chamber (11) by backwater control pipe (5) the other end.
2. a kind of low resistance force counter flow stop according to claim 1, is characterized in that: the flap cavity of resorption seal outer diameter of described drain valve (22) is greater than the seal inner diameter of epicoele.
3. a kind of low resistance force counter flow stop according to claim 1, it is characterized in that: described water inlet safety check (1) is the streamlined safety check of straight-through type full-bore, going out Water Check Valve (3) is axial flow type check valve, and the valve body (21) on hydathode top is wafer type.
4. a kind of low resistance force counter flow stop according to claim 1, is characterized in that: described hydathode (2) top is provided with suspension ring (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520993060.8U CN205136688U (en) | 2015-12-04 | 2015-12-04 | Low resistance backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520993060.8U CN205136688U (en) | 2015-12-04 | 2015-12-04 | Low resistance backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205136688U true CN205136688U (en) | 2016-04-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520993060.8U Active CN205136688U (en) | 2015-12-04 | 2015-12-04 | Low resistance backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205136688U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591543A (en) * | 2018-07-13 | 2018-09-28 | 中阀控股（集团）有限公司 | A kind of low resistance force counter flow stop |
-
2015
- 2015-12-04 CN CN201520993060.8U patent/CN205136688U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591543A (en) * | 2018-07-13 | 2018-09-28 | 中阀控股（集团）有限公司 | A kind of low resistance force counter flow stop |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |