CN104847926A - Stainless steel backflow prevention device with double non-return valves - Google Patents
Stainless steel backflow prevention device with double non-return valves Download PDFInfo
- Publication number
- CN104847926A CN104847926A CN201410561370.2A CN201410561370A CN104847926A CN 104847926 A CN104847926 A CN 104847926A CN 201410561370 A CN201410561370 A CN 201410561370A CN 104847926 A CN104847926 A CN 104847926A
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- China
- Prior art keywords
- valve
- spring
- seat
- water
- flap
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/105—Three-way check or safety valves with two or more closure members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/184—Combined check valves and actuated valves
- F16K15/1848—Check valves combined with valves having a rotating tap or cock
Abstract
The invention discloses a stainless steel backflow prevention device with double non-return valves. The backflow prevention device is mainly composed of a valve body, a valve cover, the water inlet non-return valve, the water outlet non-return valve, a hydraulic control water draining valve and a communication tube and is characterized in that the water inlet non-return valve and the water outlet non-return valve are located at the two ends of the valve body respectively, and the hydraulic control water draining valve is arranged at the position, between the water inlet non-return valve and the water outlet non-return valve, of the valve body; the valve cover is fixedly mounted on the upper portion of the valve body through a bolt; the water inlet non-return valve comprises a valve clack, a valve rod, a spring, a guide seat and a valve seat, and the water outlet non-return valve also comprises a valve rod, a valve clack, a valve seat, a spring and a guide seat; and the communication tube is arranged on the top of the valve cover to be communicated with the water inlet non-return valve and is connected in front of the valve clack of the water inlet non-return valve. The stainless steel backflow prevention device has the beneficial effects that the backflow prevention device has the advantages of being simple in structure, convenient to mount, small in size, light, long in service life and the like, the motion is sensitive, the backflow prevention performance is good, and the device is sanitary and free of pollution.
Description
Technical field
The present invention relates to a kind of backflow preventer, specifically a kind of double check valve stainless steel backflow preventer.
Background technique
Backflow preventer is that the ducted press water of a kind of considered critical can only the Waterpower control device of one-way flow.At present, the backflow preventer great majority on market adopt cast carbon steel valve body, and its volume is large, Heavy Weight, is unfavorable for installing.
Summary of the invention
The object of the present invention is to provide a kind of volume double check valve stainless steel that is little, lightweight and not polluted water backflow preventer.
The technical solution adopted for the present invention to solve the technical problems is: double check valve stainless steel backflow preventer is primarily of valve body, valve gap, water inlet safety check, go out Water Check Valve, waterpower controls drain valve and connecting tube forms, water inlet safety check and go out the two ends that Water Check Valve lays respectively at valve body, at water inlet safety check and be equiped with waterpower in going out between Water Check Valve valve body and control drain valve, the top of valve body is bolted and is equiped with valve gap, described water inlet safety check comprises flap, valve rod, spring, guide holder and valve seat, guide holder and valve seat lay respectively at the two ends into water safety check, guide holder is positioned at the entrance point of water (flow) direction, valve seat is positioned at the outlet end of water (flow) direction, and guide holder and valve seat are equipped with on valve body, an entirety is formed with valve body, central position between guide holder and valve seat is equiped with valve rod and spring, valve stem casing is in spring, and one end of valve rod is arranged with in guide holder spacing, the other end of valve rod is equiped with flap, flap and valve seat are prepared, and flap can contact with valve seat and close valve seat under the force of a spring, and sealing gasket sealing is provided with in contacting point, sealing gasket sticks on flap, the flap of water inlet safety check, spring and guide rod are assembled into an entirety, and can be left in the horizontal direction under the drive that flap is stressed, right motion, to open or close valve seat, flap is stressed comprises the bourn acting force and acting force of the spring that act on flap both sides.
Described go out Water Check Valve also include valve rod, flap, valve seat, spring and guide holder, flap is stained with sealing gasket, with water inlet safety check unlike, go out the waterexit end that the guide holder of Water Check Valve and valve seat are provided with valve body, the flap sealing of water inlet safety check comes from the reset response power of spring, and the flap sealing going out Water Check Valve comes from the active force of reverse flow.
Described waterpower controls drain valve primarily of barrier film, spring, spring seat, spring plug, pressing plate, guide rod, valve plate and valve seat composition, barrier film is installed between valve body and valve gap, valve body and valve gap are separated, spring seat is installed in the inner chamber of valve body, and spring is equiped with by guide rod between spring seat and barrier film, guide rod is through spring seat and barrier film, spring housing is located on guide rod, and be contained in spring seat, spring is by spring plug and membrane contacts, platen clamp diaphragm seal is provided with in valve gap, diaphragm clip is between pressing plate and spring plug, pressing plate is fixed on one end of guide rod, the other end of guide rod is installed in valve seat, valve seat is located at the bottom of valve body, valve plate is equiped with valve seat is supporting, and be provided with sealing gasket in the contacting point of valve plate and valve seat, sealing gasket sticks on valve plate, valve plate can contact with valve seat and seal.
The valve plate of waterpower control drain valve opens or closes the valve body pressure of intake pressure and the waterpower control drain valve be controlled by into water safety check, and control with waterpower the acting force of the spring that drain valve arranges and reach balance, be provided with at valve gap top and be communicated with water inlet safety check connecting tube, before being connected to the flap into water safety check connecting tube, when the valve body pressure that the flap sealing generation seepage going out Water Check Valve causes waterpower to control drain valve is greater than the intake pressure into water safety check, the valve plate stress balance that waterpower controls drain valve will be broken, valve plate moves upward with guide rod, valve plate opens valve body automatic drainage, ambient air enters valve body simultaneously, form air partition, effectively prevent backflow pollution.
Described valve body, valve gap, bolt, and flap, valve rod, spring, guide holder, the valve seat of water inlet safety check, go out the valve rod of Water Check Valve, flap, valve seat, spring, guide holder, waterpower controls the valve seat of drain valve, valve plate, guide rod, spring seat, pressing plate, spring plug and spring, all adopts stainless steel.
The invention has the beneficial effects as follows, the present invention has that structure is simple, easy for installation, volume is little, the advantage such as lightweight, long service life, and be active in one's movements, anti-back flow performance is good, and health is pollution-free.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention.
In figure, 1, water inlet safety check, 2, go out Water Check Valve, 3, waterpower controls drain valve, 4, valve body, 5, connecting tube, 6, valve gap, 7, bolt, 11, flap, 12, sealing gasket, 13, valve rod, 14, spring, 15, guide holder, 16, valve seat, 21, valve rod, 22, flap, 23, sealing gasket, 24, valve seat, 25, spring, 26, guide holder, 31, valve seat, 32, sealing gasket, 33, valve plate, 34, guide rod, 35, spring seat, 36, barrier film, 37, pressing plate, 38, spring plug, 39, spring.
Embodiment
With regard to accompanying drawing 1, double check valve stainless steel backflow preventer of the present invention is described in detail below below.
As shown in Figure 1, double check valve stainless steel backflow preventer of the present invention is primarily of valve body 4, valve gap 6, water inlet safety check 1, go out Water Check Valve 2, waterpower controls drain valve 3 and forms connecting tube 5, water inlet safety check 1 and go out the two ends that Water Check Valve 2 lays respectively at valve body 4, at water inlet safety check 1 and be equiped with waterpower in going out between Water Check Valve 3 valve body 4 and control drain valve 3, the top of valve body 4 is fixedly equiped with valve gap 6 by bolt 7, described water inlet safety check 1 comprises flap 11, valve rod 13, spring 14, guide holder 15 and valve seat 16, guide holder 15 and valve seat 16 lay respectively at the two ends into water safety check 1, guide holder 15 is positioned at the entrance point of water (flow) direction, valve seat 16 is positioned at the outlet end of water (flow) direction, and guide holder 15 and valve seat 16 are equipped with on valve body 4, an entirety is formed with valve body 4, central position between guide holder 15 and valve seat 16 is equiped with valve rod 13 and spring 14, valve rod 13 is enclosed within spring 14, and one end of valve rod 13 is arranged with in guide holder 15 spacing, the other end of valve rod 13 is equiped with flap 11, flap 11 and valve seat 16 are prepared, and flap 11 can contact and close valve seat 16 with valve seat 16 under the active force of spring 14, and be provided with sealing gasket 12 in contacting point and seal, sealing gasket 12 sticks on flap 11, the flap 11 of water inlet safety check 1, spring 14 and guide rod 13 are assembled into an entirety, and can be left in the horizontal direction under the drive that flap 11 is stressed, right motion, to open or close valve seat 16, flap 11 is stressed comprises the bourn acting force and spring 14 active force that act on flap 11 both sides.
Described go out Water Check Valve 2 also include valve rod 21, flap 22, valve seat 24, spring 25 and guide holder 26, flap 22 is stained with sealing gasket 23, with water inlet safety check 1 unlike, go out the waterexit end that the guide holder 26 of Water Check Valve 2 and valve seat 24 are provided with valve body 4, flap 11 sealing of water inlet safety check 1 comes from the reset response power of spring 14, and flap 22 sealing going out Water Check Valve 2 comes from the active force of reverse flow.
Described waterpower controls drain valve 3 primarily of barrier film 36, spring 39, spring seat 35, spring plug 38, pressing plate 37, guide rod 34, valve plate 33 and valve seat 31 form, barrier film 36 is installed between valve body 4 and valve gap 6, valve body 4 and valve gap 6 are separated, spring seat 35 is installed in the inner chamber of valve body 4, and spring 39 is equiped with by guide rod 34 between spring seat 35 and barrier film 36, guide rod 34 is through spring seat 35 and barrier film 36, spring 39 is set on guide rod 34, and be contained in spring seat 35, spring 39 is contacted with barrier film 36 by spring plug 35, in valve gap 6, be provided with pressing plate 37 clamp barrier film 36 and seal, barrier film 36 is clipped between pressing plate 37 and spring plug 38, pressing plate 37 is fixed on one end of guide rod 34, the other end of guide rod 34 is installed in valve seat 31, valve seat 31 is located at the bottom of valve body 4, valve plate 33 is equiped with valve seat 31 is supporting, and be provided with sealing gasket 32 at valve plate 33 and the contacting point of valve seat 31, sealing gasket 32 sticks on valve plate 33, valve plate 33 can contact with valve seat 31 and seal.
The valve plate 33 of waterpower control drain valve 3 opens or closes valve body 4 pressure of intake pressure and the waterpower control drain valve 3 be controlled by into water safety check 1, and control with waterpower spring 39 active force that drain valve 3 arranges and reach balance, be provided with at valve gap 6 top and be communicated with water inlet safety check 1 connecting tube 5, before being connected to the flap 11 into water safety check 1 connecting tube 5, when valve body 4 pressure that the flap 22 sealing generation seepage going out Water Check Valve 2 causes waterpower to control drain valve 3 is greater than the intake pressure into water safety check 1, valve plate 33 stress balance that waterpower controls drain valve 3 will be broken, valve plate 33 moves upward with guide rod 34, valve plate 33 opens valve body 4 automatic drainage, ambient air enters valve body 4 simultaneously, form air partition, effectively prevent backflow pollution.
Described valve body 4, valve gap 6, bolt 7, and flap 11, valve rod 13, spring 14, guide holder 15, the valve seat 16 of water inlet safety check 1, go out the valve rod 21 of Water Check Valve 2, flap 22, valve seat 24, spring 25, guide holder 26, waterpower controls the valve seat 31 of drain valve 3, valve plate 33, guide rod 34, spring seat 35, pressing plate 37, spring plug 38 and spring 39, all adopts stainless steel.
Claims (4)
1. a double check valve stainless steel backflow preventer is primarily of valve body, valve gap, water inlet safety check, go out Water Check Valve, waterpower controls drain valve and connecting tube forms, it is characterized in that, water inlet safety check and go out the two ends that Water Check Valve lays respectively at valve body, at water inlet safety check and be equiped with waterpower in going out between Water Check Valve valve body and control drain valve, the top of valve body is bolted and is equiped with valve gap, described water inlet safety check comprises flap, valve rod, spring, guide holder and valve seat, described go out Water Check Valve also include valve rod, flap, valve seat, spring and guide holder, described waterpower controls drain valve primarily of barrier film, spring, spring seat, spring plug, pressing plate, guide rod, valve plate and valve seat composition, be provided with at valve gap top and be communicated with water inlet safety check connecting tube, before being connected to the flap into water safety check connecting tube.
2. double check valve stainless steel backflow preventer according to claim 1, it is characterized in that, the guide holder of described water inlet safety check and valve seat lay respectively at the two ends into water safety check, guide holder is positioned at the entrance point of water (flow) direction, valve seat is positioned at the outlet end of water (flow) direction, and guide holder and valve seat are equipped with on valve body, an entirety is formed with valve body, central position between guide holder and valve seat is equiped with valve rod and spring, valve stem casing is in spring, and one end of valve rod is arranged with in guide holder spacing, the other end of valve rod is equiped with flap, flap and valve seat are prepared, and flap can contact with valve seat and close valve seat under the force of a spring, and sealing gasket sealing is provided with in contacting point, sealing gasket sticks on flap.
3. double check valve stainless steel backflow preventer according to claim 1, it is characterized in that, the barrier film that described waterpower controls drain valve is installed between valve body and valve gap, valve body and valve gap are separated, spring seat is installed in the inner chamber of valve body, and spring is equiped with by guide rod between spring seat and barrier film, guide rod is through spring seat and barrier film, spring housing is located on guide rod, and be contained in spring seat, spring is by spring plug and membrane contacts, platen clamp diaphragm seal is provided with in valve gap, diaphragm clip is between pressing plate and spring plug, pressing plate is fixed on one end of guide rod, the other end of guide rod is installed in valve seat, valve seat is located at the bottom of valve body, valve plate is equiped with valve seat is supporting, and be provided with sealing gasket in the contacting point of valve plate and valve seat, sealing gasket sticks on valve plate.
4. double check valve stainless steel backflow preventer according to claim 1, it is characterized in that, described valve body, valve gap, bolt, and flap, valve rod, spring, guide holder, the valve seat of water inlet safety check, go out the valve rod of Water Check Valve, flap, valve seat, spring, guide holder, waterpower controls the valve seat of drain valve, valve plate, guide rod, spring seat, pressing plate, spring plug and spring, all adopts stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410561370.2A CN104847926A (en) | 2014-10-22 | 2014-10-22 | Stainless steel backflow prevention device with double non-return valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410561370.2A CN104847926A (en) | 2014-10-22 | 2014-10-22 | Stainless steel backflow prevention device with double non-return valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104847926A true CN104847926A (en) | 2015-08-19 |
Family
ID=53847791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410561370.2A Pending CN104847926A (en) | 2014-10-22 | 2014-10-22 | Stainless steel backflow prevention device with double non-return valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104847926A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327598A (en) * | 2017-07-01 | 2017-11-07 | 宁波华成阀门有限公司 | A kind of compound double check valve (DCV) of copper modeling and its manufacture method |
| CN111157323A (en) * | 2020-01-19 | 2020-05-15 | 防灾科技学院 | Winch piston type gas-fixing liquid-distributing device and method |
| CN111188929A (en) * | 2020-02-28 | 2020-05-22 | 天虹阀门科技（泉州）有限公司 | Gate valve with check function |
-
2014
- 2014-10-22 CN CN201410561370.2A patent/CN104847926A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327598A (en) * | 2017-07-01 | 2017-11-07 | 宁波华成阀门有限公司 | A kind of compound double check valve (DCV) of copper modeling and its manufacture method |
| CN111157323A (en) * | 2020-01-19 | 2020-05-15 | 防灾科技学院 | Winch piston type gas-fixing liquid-distributing device and method |
| CN111157323B (en) * | 2020-01-19 | 2023-11-10 | 防灾科技学院 | Winch piston type fixed gas and liquid distribution device and method |
| CN111188929A (en) * | 2020-02-28 | 2020-05-22 | 天虹阀门科技（泉州）有限公司 | Gate valve with check function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150819 |