CN203123678U - Backflow preventer - Google Patents
Backflow preventer Download PDFInfo
- Publication number
- CN203123678U CN203123678U CN 201320103784 CN201320103784U CN203123678U CN 203123678 U CN203123678 U CN 203123678U CN 201320103784 CN201320103784 CN 201320103784 CN 201320103784 U CN201320103784 U CN 201320103784U CN 203123678 U CN203123678 U CN 203123678U
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- China
- Prior art keywords
- filter screen
- backflow preventer
- housing
- fan
- breach
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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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Abstract
The utility model discloses a backflow preventer, comprising a housing, and also a filter screen which is arranged in the backflow preventer and used for filtering a liquid, a drain outlet which is formed in the housing and used for discharging impurities, and a sealing door for sealing the drain outlet. As the filter screen is arranged in the backflow preventer, the filter screen is capable of preventing the liquid from backflow, and also functions in filtering; and as a result, no filter is needed to be mounted in front of a liquid inlet of the backflow preventer, and time and labor are saved.
Description
Technical field
The utility model relates to and prevents liquid technique of backflow field, particularly a kind of backflow preventer.
Background technology
Backflow preventer is the water supply network present according to China, especially Drinking Water pipeline backflow pollution is serious, there is not under the situation that effectively prevents the backflow pollution device novel hydropower control device that the water in a kind of strict restriction conduit of development can only one-way flow again.
In general, backflow preventer only is applicable to clear water or physics, the similar clear water of chemical property and does not allow in the pipe-line system of medium refluence.As Drinking Water pipeline and the infall that is used for non-Drinking Water pipeline that picks out; Water outlet place of close user's water meter of user is inserted in the municipal tap water; On pipeline when water logging there is not feed pipe to go out head piece; Connected on the suction piping on the Drinking Water pipeline of force (forcing) pump or multiclass supercharging equipment; Think that the pipeline that does not allow medium to flow backwards is medium in the domestic water pipe network of all kinds of buildings and the production.
In the prior art, in order to improve the quality of water supply, generally need filter be installed at the front end of the inlet of backflow preventer, cause wasting time and energy.
Therefore, how solving the problem that filter need be installed before the inlet of backflow preventer, is those skilled in the art's technical issues that need to address.
The utility model content
The purpose of this utility model provides a kind of backflow preventer, when preventing that liquid from refluxing, also has the effect of filtration.
For addressing the above problem, the utility model provides a kind of backflow preventer, comprises housing, also comprises:
Be arranged in the described backflow preventer, be used for the filter screen of filter liquide;
Be arranged on described housing, be used for discharging the sewage draining exit of impurity;
The hermatic door that is used for the described sewage draining exit of sealing.
Preferably, described filter screen and described housing removably connect;
Described housing is provided with the breach for the described filter screen of dismounting, and the position that is positioned at described breach is provided with for the seal cover that seals described breach.
Preferably, described filter screen is arranged between the plug bracing frame of described housing and described backflow preventer, and described filter screen is divided into the fan-shaped filter screen of polylith, and the angle of every described fan-shaped filter screen is all less than 180 degree;
Described housing is provided with a described breach, and along the circumferencial direction of housing, the line angulation in the two ends of described breach and the axle center of described housing is identical with the maximum angle of described fan-shaped filter screen.
Preferably, described filter screen is divided into eight described fan-shaped filter screens, and every described fan-shaped filter screen angle is 45 degree.
Preferably, in the groove and the groove of described housing of described filter screen by the groove that is arranged on described plug bracing frame, described seal cover, be connected with described housing, described seal cover and described plug bracing frame.
Preferably, described sewage draining exit is sealedly connected with blow-off line, and described hermatic door is arranged on described blow-off line.
Preferably, the mouth of pipe of the reflux line of described backflow preventer be arranged on described blow-off line on the pipeline section between described sewage draining exit and the described hermatic door.
Preferably, described seal cover is the blind plate that is connected with described housing seal.
Preferably, described hermatic door is sewage draining valve.
With respect to the above-mentioned background technology, backflow preventer provided by the utility model comprises housing, filter screen, sewage draining exit and hermatic door.Filter screen is arranged on the inside of backflow preventer, is used for filter liquide.Sewage draining exit is arranged on the housing, is used for discharging impurity.Hermatic door is used for sealing sewage draining exit.More when the impurity of filter screen interception, when needing to discharge, open hermatic door, impurity is discharged from sewage draining exit.Filter screen is set in backflow preventer, can prevents that not only liquid from refluxing, but also play a part to filter, need not before the inlet of backflow preventer, filter be installed again, time saving and energy saving.
Description of drawings
Schematic diagram when Fig. 1 is backflow preventer operate as normal provided by the utility model;
Schematic diagram when Fig. 2 is the anti-backflow of backflow preventer provided by the utility model;
Fig. 3 is the structural representation of the filter screen of backflow preventer provided by the utility model.
Among Fig. 1-Fig. 3:
Housing-1, fan-shaped filter screen-2, plug bracing frame-3, hermatic door-4, blow-off line-5, reflux line-6.
The specific embodiment
Core of the present utility model provides a kind of backflow preventer, when preventing that liquid from refluxing, also has the effect of filtration.
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described.
Please refer to Fig. 1, Fig. 2 and Fig. 3, the schematic diagram when Fig. 1 is backflow preventer operate as normal provided by the utility model; Schematic diagram when Fig. 2 is the anti-backflow of backflow preventer provided by the utility model; Fig. 3 is the structural representation of the filter screen of backflow preventer provided by the utility model.
The hermatic door 4 that the backflow preventer that the utility model provides comprises housing 1, is used for the filter screen of impurity screening, is used for discharging the sewage draining exit of impurity and is used for the sealing sewage draining exit.Wherein, filter screen is arranged in the backflow preventer.Sewage draining exit is arranged on the housing 1 between filter screen and the inlet.
With respect to prior art, the utility model has the advantages that: can prevent that not only liquid from refluxing, but also play a part to filter, need not before the inlet of backflow preventer, filter be installed again, time saving and energy saving, simultaneously, also reduce installation cost and maintenance cost, saved installing space.
Because filter screen needs often to safeguard or to change, and therefore filter screen and housing 1 is removably connected, be provided with breach for the dismounting filter screen at housing 1, be provided with the seal cover for seal gap in the position that is positioned at breach.
In a kind of specific embodiment, filter screen is arranged on the position of the comparatively close inlet of housing 1.In the position that filter screen is set breach is set, filter screen can be arranged in the backflow preventer by breach.
Further, filter screen is fixed on the housing 1 by the groove of housing 1 and the groove of seal cover.The position more in accumulation of impurities arranges sewage draining exit, and most of impurity can be discharged smoothly, prevents from stopping up filter screen.
In the another kind of specific embodiment, filter screen is arranged between the plug bracing frame 3 of housing 1 and backflow preventer.One circle groove is set respectively on housing 1 and the plug bracing frame 3, groove also is set on seal cover, be placed in the groove filter screen fixing.Can in groove, place sealing gasket, filter screen and housing 1, plug bracing frame 3 and seal cover are tightly connected.
Certainly, groove also can be arranged on housing 1 or the plug bracing frame 3 discontinuously.Also can projection be set at housing 1, plug bracing frame 3 and seal cover, groove etc. is set in projection, this paper repeats no more.
In order filter screen to be installed between housing 1 and the plug bracing frame 3, filter screen is divided into the fan-shaped filter screen 2 of polylith, the maximum angle of every fan-shaped filter screen 2 should be less than 180 degree.Along the circumferencial direction of housing 1, the line angle at the two ends of breach and the center of housing 1 is identical with the maximum angle of fan-shaped filter screen 2.
Further, more convenient when fan-shaped filter screen 2 is set, the angle of every fan-shaped filter screen 2 all is made as 45 degree.Certainly, because mismachining tolerance may definitely not be 45 degree.
Can a breach be set at housing 1.To reduce the opening of housing 1, the service life of improving backflow preventer.
Certainly, for the fan-shaped filter screen 2 of more convenient taking-up, also can two breach be set at housing 1, the line angulation that makes the axle center of the center of two breach and housing 1 is 180 degree etc.
When fan-shaped filter screen 2 is installed, open seal cover, by breach every fan-shaped filter screen 2 is arranged in the groove, after setting, use the seal cover seal gap.When needs are dismantled fan-shaped filter screen 2, open seal cover, fan-shaped filter screen 2 is moved to the position of breach, dismantle fan-shaped filter screen 2 one by one.
In the preferred version of this specific embodiment, the blow-off line 5 of position seals connection at sewage draining exit is arranged on hermatic door 4 on the blow-off line 5.So arrange, hermatic door 4 conveniently is set.And preferentially select for use at hermatic door 4 sealing ring is set, so that hermatic door 4 sealings are more tight.
Further, hermatic door 4 is made as sewage draining valve.So arrange, under the bigger situation of pressure, also can conveniently open or close.
More in order to prevent housing 1 opening, cause its performance to descend, reduce its service life.With the mouth of pipe of the reflux line 6 of backflow preventer be arranged on blow-off line 5 on the pipeline section between sewage draining exit and the hermatic door 4.
In the another kind of preferred version of this specific embodiment, seal cover is made as the blind plate that is tightly connected with housing 1, blind plate is fixed on the housing 1 by screw, with the easy disassembly blind plate.
Certainly, an end of seal cover also can be rotatably connected with housing 1.When needs were opened seal cover, directly the rotatory sealing lid can wait.
More than backflow preventer provided by the utility model is described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (9)
1. a backflow preventer comprises housing (1), it is characterized in that, also comprises:
Be arranged in the described backflow preventer, be used for the filter screen of filter liquide;
Be arranged on described housing (1), be used for discharging the sewage draining exit of impurity;
The hermatic door (4) that is used for the described sewage draining exit of sealing.
2. backflow preventer according to claim 1 is characterized in that, described filter screen and described housing (1) removably connect;
Described housing (1) is provided with the breach for the described filter screen of dismounting, and the position that is positioned at described breach is provided with for the seal cover that seals described breach.
3. backflow preventer according to claim 2, it is characterized in that, described filter screen is arranged between the plug bracing frame (3) of described housing (1) and described backflow preventer, and described filter screen is divided into the fan-shaped filter screen of polylith (2), and the angle of every described fan-shaped filter screen (2) is all less than 180 degree;
Described housing (1) is provided with a described breach, and along the circumferencial direction of housing (1), the line angulation in the two ends of described breach and the axle center of described housing (1) is identical with the maximum angle of described fan-shaped filter screen (2).
4. backflow preventer according to claim 3 is characterized in that, described filter screen is divided into eight described fan-shaped filter screens (2), and every described fan-shaped filter screen (2) angle is 45 degree.
5. backflow preventer according to claim 4, it is characterized in that, in the groove and the groove of described housing (1) of described filter screen by the groove that is arranged on described plug bracing frame (3), described seal cover, be connected with described housing (1), described seal cover and described plug bracing frame (3).
6. backflow preventer according to claim 3 is characterized in that, described sewage draining exit is sealedly connected with blow-off line (5), and described hermatic door (4) is arranged on described blow-off line (5).
7. backflow preventer according to claim 5 is characterized in that, the mouth of pipe of the reflux line of described backflow preventer (6) is arranged on being positioned on the pipeline section between described sewage draining exit and the described hermatic door (4) of described blow-off line (5).
8. backflow preventer according to claim 7 is characterized in that, described seal cover is the blind plate that is tightly connected with described housing (1).
9. backflow preventer according to claim 7 is characterized in that, described hermatic door (4) is sewage draining valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320103784 CN203123678U (en) | 2013-03-07 | 2013-03-07 | Backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320103784 CN203123678U (en) | 2013-03-07 | 2013-03-07 | Backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203123678U true CN203123678U (en) | 2013-08-14 |
Family
ID=48931708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320103784 Expired - Fee Related CN203123678U (en) | 2013-03-07 | 2013-03-07 | Backflow preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203123678U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103623636A (en) * | 2013-11-07 | 2014-03-12 | 温州正凌机械制造有限公司 | Filter |
| CN105797470A (en) * | 2016-05-13 | 2016-07-27 | 安庆市峰邦工业产品设计有限公司 | Water supply interruption and backflow prevention device for reverse-washing filter |
-
2013
- 2013-03-07 CN CN 201320103784 patent/CN203123678U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103623636A (en) * | 2013-11-07 | 2014-03-12 | 温州正凌机械制造有限公司 | Filter |
| CN103623636B (en) * | 2013-11-07 | 2015-08-19 | 温州正凌机械制造有限公司 | Filter |
| CN105797470A (en) * | 2016-05-13 | 2016-07-27 | 安庆市峰邦工业产品设计有限公司 | Water supply interruption and backflow prevention device for reverse-washing filter |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20170307 |