CN203809791U - Novel backflow preventer - Google Patents
Novel backflow preventer Download PDFInfo
- Publication number
- CN203809791U CN203809791U CN201320560067.1U CN201320560067U CN203809791U CN 203809791 U CN203809791 U CN 203809791U CN 201320560067 U CN201320560067 U CN 201320560067U CN 203809791 U CN203809791 U CN 203809791U
- Authority
- CN
- China
- Prior art keywords
- check valve
- valve seat
- return system
- spring
- valve body
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000009530 blood pressure measurement Methods 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 239000002384 drinking water standard Substances 0.000 abstract description 2
- 230000006837 decompression Effects 0.000 abstract 2
- 230000009467 reduction Effects 0.000 description 7
- 230000003373 anti-fouling effect Effects 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Check Valves (AREA)
- Safety Valves (AREA)
Abstract
The utility model provides a novel backflow preventer comprising a front non-return system, a back no-return system and a draining decompression system. The front no-return system is connected with the back no-return system; the draining decompression system is arranged between the front and the back no-return systems; the front no-return system comprises a front no-return valve disc, a front no-return valve seat, a sealing gasket and a spring; and the back no-return system is formed by a back no-return valve disc, a back no-return valve seat, a sealing gasket and a spring. By the use of the novel backflow preventer, water resource can be well protected, secondary pollution can be prevented and drinking water standard can be improved; the valve is rationally structured and designed with smooth flow channel, low noise, large flow speed and small flow resistance; drainage can be normally conducted without outside influence; the backflow preventer is a concave-convex film sheet, so sensitive and reliable start, close reset can be provided; the novel backflow preventer can be installed in any angles; and flow speed and flow amount can be tested and detected.
Description
Technical field
The utility model relates to control valve field, is specially a kind of novel reverse flow preventing device.
Background technique
Backflow preventer is for preventing the safety installations of drinking water pipeline generation backflow pollution, to guarantee health and the safety of Drinking Water.Particularly be used in city planting ductwork and prevent that sewage or other liquid contamination water quality from flowing backwards in water supply pipe, for the people's water safety provides safeguard.
The antifouling separative valves adopting both at home and abroad is at present that one-level safety check, secondary check valve and self-draining arrangement have been carried out to independent assortment in various degree, such structure has effectively completed the object that the ducted press water of strict restriction can only one-way flow, but complex structure, volume is large, weight is large, thereby causes valve installation, maintenance and manufacture large; In actual using process self-draining arrangement respond to by outside or induced inside pipeline before and after pressure reduction realize and opening or closing, due to often more complicated of applying working condition, make impurity usually blockage sensing pipeline cause self-draining arrangement to lose efficacy, thereby cause the antifouling separative valves cannot draining and flow backwards; Due to water flowing pressure or return pressure large, be easy to cause the diaphragm failures of backflow preventer, make antifouling separative valves draining in the time of normal water flowing, one-level safety check lost efficacy while preventing from flowing backwards, greatly reduced pipeline tap water quality.
Summary of the invention
The technical problem that the utility model solves is to provide a kind of novel reverse flow preventing device, to solve the problem proposing in above-mentioned background technology.
The technical problem that the utility model solves realizes by the following technical solutions: a kind of novel reverse flow preventing device, comprise: front non-return system, rear non-return system, draining pressure relief system, described front non-return system is connected with rear non-return system, draining pressure relief system is located between front non-return system and rear non-return system, described front non-return system comprises: front check valve disc, front Boilor check valve seat, sealing gasket, spring, rear non-return system comprises: rear check valve disc, rear Boilor check valve seat, sealing gasket, spring, described front Boilor check valve seat is connected in auxiliary valve body by valve gap, between valve gap and auxiliary valve body, be provided with pressure measurement mouth, valve gap inner side is provided with diaphragm top board, diaphragm top board bottom is provided with diaphragm press table, auxiliary valve body is provided with stud bolt, between stud bolt and auxiliary valve body, be provided with O RunddichtringO II, auxiliary valve body is connected in rear check valve disc by rear Boilor check valve seat, front Boilor check valve seat upper end is connected in valve gap, lower end is connected in front check valve disc, front check valve disc is provided with spring seat, on spring seat, be mounted with spring, main valve body inside lower end is provided with the valve seat of releasing, the valve seat top of releasing has sluicing flap, inside to be provided with stator nut, in stator nut, is provided with spacer, and stator nut has sluicing spring, drain connection is located at main valve body inner side and is connected by sluicing spring with leaf nut, and drain connection is connected with brass ball valve, valve rod is arranged on main valve body inside, upper end is connected in diaphragm top board lower end by hexagon nut and is connected with sluicing flap, spacer, stator nut.
Between described front Boilor check valve seat and valve gap, a side is provided with O RunddichtringO I, opposite side is provided with O RunddichtringO IV.
Described valve gap and rear Boilor check valve seat are connected and fixed by hexagon socket head cap screw.
Between described pressure measurement mouth and valve gap and rear Boilor check valve seat, be provided with pressure measurement mouth pad.
Between described diaphragm press table and diaphragm top board, be provided with diaphragm.
Between described auxiliary valve body and rear Boilor check valve seat, be provided with O RunddichtringO III.
Described releasing is provided with O RunddichtringO V between valve seat and main valve body.
Compared with prior art, the beneficial effects of the utility model are: the utility model is effectively protected water source, avoids secondary pollution, improve drinking water standard; Valve design is rational in infrastructure, and runner is without hindrance, and noise is low, and flow velocity is large, and flow resistance is little, and loss of head control is 1.2-2.6 rice; This valve adopts novel water draw-off, effectively protects network security, fluctuates little, sluices, pressure release is safe and reliable, is not subject to the improper sluicing of ectocine; Backflow preventer adopts concavo-convex diaphragm design, opens and closes reset sensitive reliable; The utility model interior fittings adopts food stage 304 stainless steels, effectively stops the destruction of back pressure to valve and pipeline, effectively controls and flows backwards and siphon, plays quiet closing, and main body adopts inside and outside epoxy electrostatic spraying not contaminated; Valve mechanism is reasonable, and upper end, middle-end, lower end and epicoele are equipped with Special pressure measuring valve, and test maintenance flow rate can any angle be installed.
Brief description of the drawings
Fig. 1 is sectional view structural representation of the present utility model.
In figure: 1, brass ball; 4, O RunddichtringO I; 5, pressure measurement mouth; 6, pressure measurement mouth pad; 7, hexagon socket head cap screw; 8, valve gap; 9, hexagon nut; 10, diaphragm top board; 11, diaphragm; 12, diaphragm press table; 14, stud bolt; 15, O RunddichtringO II; 16, auxiliary valve body; 17, O RunddichtringO III; 18, rear check valve disc; 19, rear Boilor check valve seat; 20, valve rod; 21, O RunddichtringO IV; 22, spring; 23, spring seat; 24, front check valve disc; 25, front Boilor check valve seat; 26, main valve body; 27, sluicing flap; 28, spacer; 29, stator nut; 30, O RunddichtringO V; 31, the valve seat of releasing; 32, sluicing spring; 33, drain connection.
Embodiment
In order to make of the present utility modelly to realize technological means, creation characteristic, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, a kind of novel reverse flow preventing device, comprise: front non-return system, rear non-return system, draining pressure relief system, described front non-return system is connected with rear non-return system, draining pressure relief system is located between front non-return system and rear non-return system, described front non-return system comprises: front check valve disc 24, front Boilor check valve seat 25, sealing gasket, spring 22, rear non-return system comprises: rear check valve disc 18, rear Boilor check valve seat 19, sealing gasket, spring 22, described front Boilor check valve seat 25 is connected in auxiliary valve body 16 by valve gap 8, between valve gap 8 and auxiliary valve body 16, be provided with pressure measurement mouth 5, valve gap 8 inner sides are provided with diaphragm 11 top boards 10, diaphragm 11 top board 10 bottoms are provided with diaphragm press table 12, auxiliary valve body 16 is provided with stud bolt 14, between stud bolt 14 and auxiliary valve body 16, be provided with O RunddichtringO II15, auxiliary valve body 16 is connected in rear check valve disc 18 by rear Boilor check valve seat 19, front Boilor check valve seat 25 upper ends are connected in valve gap 8, lower end is connected in front check valve disc 24, front check valve disc 24 is provided with spring seat 23, on spring seat 23, be mounted with spring 22, main valve body 26 inside lower end are provided with the valve seat 31 of releasing, sluicing flap 27 is arranged at valve seat 31 tops of releasing, inside is provided with stator nut 29, in stator nut 29, be provided with spacer 28, stator nut 29 has sluicing spring 32, drain connection 33 is located at main valve body 26 inner sides and is connected by sluicing spring 32 with leaf nut, drain connection 33 is connected with brass ball 1, valve rod 20 is arranged on main valve body 26 inside, upper end is connected in diaphragm top board lower end by hexagon nut 9 and is connected with sluicing flap 27, spacer 28, stator nut 29.
Between described front Boilor check valve seat 25 and valve gap 8, a side is provided with O RunddichtringO I4, opposite side is provided with O RunddichtringO IV 21.
Described valve gap 8 is connected and fixed by hexagon socket head cap screw 7 with rear Boilor check valve seat 19.
Between described pressure measurement mouth 5 and valve gap 8 and rear Boilor check valve seat 19, be provided with pressure measurement mouth pad 6.
Between described diaphragm press table 12 and diaphragm 11 top boards 10, be provided with diaphragm 11.
Between described auxiliary valve body 16 and rear Boilor check valve seat 19, be provided with O RunddichtringO III17.
Described releasing is provided with O RunddichtringO V 30 between valve seat 31 and main valve body 26.
The utility model is to give and establish a draining pressure relief device in two stage non-return system, even if two stage non-return sealing destroys so simultaneously, it also can play the effect that prevents backflow pollution.Its working principle;
When normal water supply:
Clean municipal Living Water supplies water to second level non-return system outlet user through hydathode from first order non-return system, non-return system import high pressure water enters draining barrier film epicoele each time, and barrier film cavity of resorption communicates with first order safety check outlet (second level check valve inlet), because it exists certain pressure reduction, promotion flap moves down, hydathode cuts out, antifouling separative valves normal water supply;
When pipeline no user after valve, water is static.As inlet pressure remains unchanged, before and after it, there is pressure reduction, hydathode is still closed condition;
As inlet pressure declines, when pressure reduction drops to certain value before and after it, spring 22 promotes spool upwards, and hydathode is opened pressure release, and pressure release is when recovering certain pressure reduction with inlet pressure, and hydathode cuts out again.
Seal when malfunctioning:
After antifouling separative valves, ductwork pressure raises, and while exceeding the front inlet pressure of valve, as the intact ne-leakage of the second check valve seal, high pressure water can not flow backwards, and hydathode barrier film keeps original pressure reduction up and down, and hydathode cuts out, not pressure release.Destroy and produce seepage when second level check valve seal, before the safety check of the second level, pressure raises, and causes the upper and lower pressure reduction of hydathode barrier film to reduce, and hydathode is opened, draining pressure release; Now, as simultaneously seal break-off of first order safety check, the high pressure water flowing backwards back due to second level safety check pressure release reduces pressure, therefore the first order safety check that can not flow backwards.
As water supply process pressure of supply water constantly declines, hydathode barrier film upper pressure declines, and safety drainage device control spring 22 promotes spool and opens hydathode draining.When inlet pressure drops to zero or when negative pressure, hydathode is opened completely, water is discharged, and air enters vacuum chamber from hydathode.Thereby prevent siphon refluence phenomenon.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.Claimed scope of the present utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. a novel reverse flow preventing device, comprise: front non-return system, rear non-return system, draining pressure relief system, described front non-return system is connected with rear non-return system, draining pressure relief system is located between front non-return system and rear non-return system, described front non-return system comprises: front check valve disc, front Boilor check valve seat, sealing gasket, spring, rear non-return system comprises: rear check valve disc, rear Boilor check valve seat, sealing gasket, spring, it is characterized in that: described front Boilor check valve seat is connected in auxiliary valve body by valve gap, between valve gap and auxiliary valve body, be provided with pressure measurement mouth, valve gap inner side is provided with diaphragm top board, diaphragm top board bottom is provided with diaphragm press table, auxiliary valve body is provided with stud bolt, between stud bolt and auxiliary valve body, be provided with O RunddichtringO II, auxiliary valve body is connected in rear check valve disc by rear Boilor check valve seat, front Boilor check valve seat upper end is connected in valve gap, lower end is connected in front check valve disc, front check valve disc is provided with spring seat, on spring seat, be mounted with spring, main valve body inside lower end is provided with the valve seat of releasing, the valve seat top of releasing has sluicing flap, inside to be provided with stator nut, in stator nut, is provided with spacer, and stator nut has sluicing spring, drain connection is located at main valve body inner side and is connected by sluicing spring with leaf nut, and drain connection is connected with brass ball valve, valve rod is arranged on main valve body inside, upper end is connected in diaphragm top board lower end by hexagon nut and is connected with sluicing flap, spacer, stator nut.
2. a kind of novel reverse flow preventing device according to claim 1, is characterized in that: between described front Boilor check valve seat and valve gap, a side is provided with O RunddichtringO I, opposite side is provided with O RunddichtringO IV.
3. a kind of novel reverse flow preventing device according to claim 1, is characterized in that: described valve gap and rear Boilor check valve seat are connected and fixed by hexagon socket head cap screw.
4. a kind of novel reverse flow preventing device according to claim 1, is characterized in that: between described pressure measurement mouth and valve gap and rear Boilor check valve seat, be provided with pressure measurement mouth pad.
5. a kind of novel reverse flow preventing device according to claim 1, is characterized in that: between described diaphragm press table and diaphragm top board, be provided with diaphragm.
6. a kind of novel reverse flow preventing device according to claim 1, is characterized in that: between described auxiliary valve body and rear Boilor check valve seat, be provided with O RunddichtringO III.
7. a kind of novel reverse flow preventing device according to claim 1, is characterized in that: described in release and between valve seat and main valve body, be provided with O RunddichtringO V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320560067.1U CN203809791U (en) | 2013-09-10 | 2013-09-10 | Novel backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320560067.1U CN203809791U (en) | 2013-09-10 | 2013-09-10 | Novel backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809791U true CN203809791U (en) | 2014-09-03 |
Family
ID=51448541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320560067.1U Expired - Fee Related CN203809791U (en) | 2013-09-10 | 2013-09-10 | Novel backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809791U (en) |
Cited By (2)
| 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 |
| CN116324244A (en) * | 2020-08-21 | 2023-06-23 | 塞尔达塑料工贸股份有限公司 | Isolator (backflow preventer) |
-
2013
- 2013-09-10 CN CN201320560067.1U patent/CN203809791U/en not_active Expired - Fee Related
Cited By (3)
| 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 |
| CN108591543B (en) * | 2018-07-13 | 2025-03-28 | 中阀控股（集团）有限公司 | A low resistance backflow preventer |
| CN116324244A (en) * | 2020-08-21 | 2023-06-23 | 塞尔达塑料工贸股份有限公司 | Isolator (backflow preventer) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE60323502D1 (en) | BRONCHIAL FLOW DEVICE WITH A MEMBRANE SEAL | |
| GB2470839A (en) | Plumbing sealing arrangement | |
| CN205012403U (en) | Water supply system with pressure release reflux unit | |
| CN102671791B (en) | Anti-explosion ball head | |
| CN203809791U (en) | Novel backflow preventer | |
| CN105805365A (en) | Pressure reduction type backflow preventing device | |
| US20090183780A1 (en) | Water trap assembly for vacuum-line plumbing systems | |
| CN205978671U (en) | Decompression type hangs down resistance backflow preventer | |
| CN205875373U (en) | Two box sewage lifting device of integration | |
| CN105401611A (en) | System and method for supplying water to radioactive regions of nuclear chemical engineering plant | |
| CN202578629U (en) | New Manifold Valve Group for Oil Well Head | |
| CN202638633U (en) | Explosion-proof spherical head | |
| CN207109931U (en) | It is energy-saving to flow backwards anti-locking system | |
| CN206034584U (en) | Prevent odor returning sewer pipe fitting | |
| CN204312750U (en) | A kind of built-in bend anti-backflow ball valve | |
| CN205712347U (en) | A kind of environmental protecting device preventing sewage from flowing backwards | |
| CN110332341A (en) | A kind of backflow preventer | |
| CN2931981Y (en) | Vacuum breaking anti-siphon device for water supply appliances | |
| CN213176919U (en) | Air blocking device with multiple protection | |
| CN219518395U (en) | water purification system | |
| CN2357186Y (en) | Device for preventing flowing backwards of water in pipe | |
| CN203227350U (en) | Water-purifying water faucet | |
| CN201739622U (en) | Drainer function detection device for a back flow prevention device | |
| CN209458440U (en) | A kind of backflow preventer | |
| CN104455527A (en) | Backflow-prevention spherical valve with built-in bend |
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: 20140903 Termination date: 20140910 |
|
| EXPY | Termination of patent right or utility model |