CN104405936A - Low-resistance decompression type backflow prevention device - Google Patents
Low-resistance decompression type backflow prevention device Download PDFInfo
- Publication number
- CN104405936A CN104405936A CN201410636764.XA CN201410636764A CN104405936A CN 104405936 A CN104405936 A CN 104405936A CN 201410636764 A CN201410636764 A CN 201410636764A CN 104405936 A CN104405936 A CN 104405936A
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- China
- Prior art keywords
- valve
- check
- valve body
- fixed
- water
- 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.)
- Pending
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Classifications
-
- 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
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention relates to a low-resistance decompression type backflow prevention device, belonging to the technical field of check valves. The low-resistance decompression type backflow prevention device comprises a valve body which is internally and detachably provided with two check valve assemblies; the valve body between the two check valve assemblies is provided with a valve cover and a water releasing valve; the water releasing valve is located under the valve cover; each check valve assembly comprises a valve clack seat, a valve clack, a check valve rod, a coefficient variable spring and a spring plate; the valve clack seats are fixed on the inner wall of the valve body and the check valve rods are movably arranged on the valve clack seats in a penetrating manner; the coefficient variable springs sleeve the end parts, located at a water feeding side of the valve body, of the check valve rods; the valve clacks are fixed at the end parts, located at a water discharging side of the valve body, of the check valve rods; the sealing plates are fixed at the end parts, located at the water discharging side of the valve body, of the valve clacks; the sealing plates are matched with water discharging openings of the valve clack seats. The low-resistance decompression type backflow prevention device has small size and small water resistance, and can be maintained online.
Description
Technical field
The present invention relates to a kind of lower resistance pressure reduction type backflow preventer, belong to the technical field of safety check.
Background technique
Backflow preventer is as the one of safety check, and object is to prevent sewage from flowing backwards.At present, common backflow preventer adopts single double check valve structure, individual huge, takies pipeline space large, and during installation, labor intensity is large, simultaneously can not on-line maintenance, and when safeguarding, labour cost is high.In addition, common pressure reduction type backflow preventer water resistance is large, has the operating mode of particular/special requirement to be difficult to meet the demands at some to water resistance, and common backflow preventer can not realize opening soon the function that speed is closed, do not reach the object reducing damage by water, anti-back flow, reduce the safety coefficient preventing from flowing backwards.
Summary of the invention
The object of this invention is to provide a kind of volume little, can on-line maintenance, lower resistance pressure reduction type backflow preventer that water resistance is little.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of lower resistance pressure reduction type backflow preventer, comprise the inner detachable valve body being provided with two check valve assemblies, valve body between two check valve assemblies is provided with valve gap and drain valve, and drain valve is positioned at the below of valve gap, check valve assembly comprises flap seat, flap, check-valve lever, change is spring, sealing plate, flap seat is fixed on valve interior wall, check-valve lever movable is located on flap seat, change is that spring to be nested with on the end that check-valve lever is positioned at valve inleting water side (namely become be spring holding at check-valve lever between the end and flap seat of valve inleting water side), flap is fixed on check-valve lever and is positioned on the end of valve body water outlet side, sealing plate is fixed on flap and is positioned on the end of valve body water outlet side, and the water outlet port of sealing plate and flap seat matches.
As the further setting of such scheme, described valve body is provided with the external hydathode of band valve, external hydathode comprises one end and is communicated with drain valve, the waste pipe of the other end and valve inleting water end chamber.
Described valve is arranged on the connecting end of waste pipe and drain valve.
Be provided with sealing gasket between described sealing plate and flap seat, and sealing gasket is fixed on sealing plate.
Described waste pipe is by being with plunger and the valve inleting water end chamber of through hole, and plunger is fixed on valve body.
The present invention has following beneficial effect:
1. in order to improve Safety function, preventing medium from flowing backwards, increasing drain valve in the middle of two safety check, substantially increase the Safety performance preventing from flowing backwards and occur to pollute;
2. open speed soon close to reduce damage by water, anti-back flow object for reaching, adopt change to be spring, realize opening speed soon and close, really reach effect of lower resistance;
3. in order to realize for the purpose of on-line maintenance, adopt valve cover structure and external hydathode, easily realizing on-line maintenance the two poles of the earth safety check and hydathode, effectively raise on-line maintenance efficiency, reduce labor intensity and cost;
4. install labor intensity to save installing space and reducing, backflow preventer is adopted to the integral structure design of compact type, both two valve body formula castings, the loss of material has not only been saved in this design, more reduce installation labor intensity.
The present invention is that in a kind of considered critical pipeline, water can only the waterpower control combination device of one-way flow.Its function is under any operating mode, prevent ducted medium from flowing backwards, and avoids to reach the object polluted that flows backwards, and is that spring makes realization open speed soon to close reduction water resistance by change.
Use occasion of the present invention: be applicable to clear water or physics, the similar clear water of chemical property and do not allow the pipe-line system that medium flows backwards.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, a kind of lower resistance pressure reduction type backflow preventer of the present invention, comprise the inner detachable valve body 1 being provided with two check valve assemblies, valve body 1 between two check valve assemblies is provided with valve gap 6 and drain valve 10, and drain valve 10 is positioned at the below of valve gap 6, check valve assembly comprises flap seat 5, flap 9, check-valve lever 3, change is spring 2, sealing plate 8, flap seat 5 is fixed on valve body 1 inwall, check-valve lever 3 movable is located on flap seat 5, change is that spring 2 is nested with on the end that check-valve lever 3 is positioned at valve body 1 influent side, flap 9 is fixed on check-valve lever 3 and is positioned on the end of valve body 1 water outlet side, sealing plate 8 is fixed on flap 9 and is positioned on the end of valve body 1 water outlet side, and sealing plate 8 matches with the water outlet port of flap seat 5.
For optimizing structure further, the present invention is provided with the external hydathode of band valve 11 on valve body 1, and external hydathode comprises one end and is communicated with drain valve 10, the waste pipe 12 that the other end is communicated with valve body 1 feed-water end chamber 4.Valve 11 is preferably arranged on waste pipe 12 with on the connecting end of drain valve 10.Waste pipe 12 is communicated with valve body 1 feed-water end chamber 4 by the plunger 13 of band through hole, and plunger 13 is fixed on valve body 1.
For enhanced leaktightness performance, the present invention is provided with sealing gasket 7 between sealing plate 8 and flap seat 5, and sealing gasket 7 is fixed on sealing plate 8.
The present invention adopts change to be that (change is spring 2 is dual spring rates spring to spring design structure, also claims gradual spring to non-return flap spring.What it adopted is the design that decreasing worm-pitch does not wait circle footpath, and namely circle footpath in two ends is little, and mesosphere footpath is large.Two ends spring is less than intermediate portion by the power compressed, so phase channel angular spring moment resistance is little.) take into account lower resistance and taken into account again support force.
Valve body 1 of the present invention adopts integral type casting, and the loss of material has not only been saved in this design, has more saved installing space and has reduced product and installed labor intensity.Open speed soon close to reduce damage by water, anti-back flow object for reaching, adopt change to be spring 2, realize opening speed soon and close, really reach effect of lower resistance.For realizing for the purpose of on-line maintenance, adopting valve cover structure and external hydathode, easily realizing on-line maintenance the two poles of the earth safety check and hydathode, effectively raise on-line maintenance efficiency, reduce labour cost.
Above-described embodiment only illustrates inventive concept of the present invention for explaining, but not the restriction to rights protection of the present invention, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should fall into protection scope of the present invention.
Claims (5)
1. a lower resistance pressure reduction type backflow preventer, it is characterized in that: comprise the inner detachable valve body being provided with two check valve assemblies, valve body between two check valve assemblies is provided with valve gap and drain valve, and drain valve is positioned at the below of valve gap, check valve assembly comprises flap seat, flap, check-valve lever, change is spring, sealing plate, flap seat is fixed on valve interior wall, check-valve lever movable is located on flap seat, change is that spring is nested with on the end that check-valve lever is positioned at valve inleting water side, flap is fixed on check-valve lever and is positioned on the end of valve body water outlet side, sealing plate is fixed on flap and is positioned on the end of valve body water outlet side, and the water outlet port of sealing plate and flap seat matches.
2. a kind of lower resistance pressure reduction type backflow preventer as claimed in claim 1, it is characterized in that: the external hydathode described valve body being provided with band valve, external hydathode comprises one end and is communicated with drain valve, the waste pipe of the other end and valve inleting water end chamber.
3. a kind of lower resistance pressure reduction type backflow preventer as claimed in claim 2, is characterized in that: described valve is arranged on the connecting end of waste pipe and drain valve.
4. a kind of lower resistance pressure reduction type backflow preventer as claimed in claim 1, is characterized in that: be provided with sealing gasket between described sealing plate and flap seat, and sealing gasket is fixed on sealing plate.
5. a kind of lower resistance pressure reduction type backflow preventer as claimed in claim 2 or claim 3, is characterized in that: described waste pipe is by being with plunger and the valve inleting water end chamber of through hole, and plunger is fixed on valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636764.XA CN104405936A (en) | 2014-11-12 | 2014-11-12 | Low-resistance decompression type backflow prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410636764.XA CN104405936A (en) | 2014-11-12 | 2014-11-12 | Low-resistance decompression type backflow prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104405936A true CN104405936A (en) | 2015-03-11 |
Family
ID=52643587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410636764.XA Pending CN104405936A (en) | 2014-11-12 | 2014-11-12 | Low-resistance decompression type backflow prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104405936A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413099A (en) * | 2017-07-31 | 2018-08-17 | 成都威特电喷有限责任公司 | It is switched off or on the partition check-valves of oil supply system oil circuit medium back flow |
| CN111075963A (en) * | 2019-11-18 | 2020-04-28 | 株洲南方阀门股份有限公司 | A low-resistance backflow preventer |
| CN111322226A (en) * | 2018-12-14 | 2020-06-23 | 夏泰鑫半导体(青岛)有限公司 | Vacuum system and semiconductor processing equipment |
| CN112628433A (en) * | 2020-12-23 | 2021-04-09 | 广东永泉阀门科技有限公司 | Double check valve group mounting structure of backflow preventer |
| CN112943982A (en) * | 2021-02-01 | 2021-06-11 | 安徽荣达阀门有限公司 | Water inlet end sealing valve clack device of backflow preventer |
-
2014
- 2014-11-12 CN CN201410636764.XA patent/CN104405936A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413099A (en) * | 2017-07-31 | 2018-08-17 | 成都威特电喷有限责任公司 | It is switched off or on the partition check-valves of oil supply system oil circuit medium back flow |
| CN111322226A (en) * | 2018-12-14 | 2020-06-23 | 夏泰鑫半导体(青岛)有限公司 | Vacuum system and semiconductor processing equipment |
| CN111075963A (en) * | 2019-11-18 | 2020-04-28 | 株洲南方阀门股份有限公司 | A low-resistance backflow preventer |
| CN112628433A (en) * | 2020-12-23 | 2021-04-09 | 广东永泉阀门科技有限公司 | Double check valve group mounting structure of backflow preventer |
| CN112943982A (en) * | 2021-02-01 | 2021-06-11 | 安徽荣达阀门有限公司 | Water inlet end sealing valve clack device of backflow preventer |
| CN112943982B (en) * | 2021-02-01 | 2024-06-07 | 安徽荣达阀门有限公司 | Valve clack device is sealed to water inlet end of backflow preventer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150311 |
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| RJ01 | Rejection of invention patent application after publication |