CN202132558U - Built-in filter screen and backflow preventer without built-out piping - Google Patents
Built-in filter screen and backflow preventer without built-out piping Download PDFInfo
- Publication number
- CN202132558U CN202132558U CN201020637016U CN201020637016U CN202132558U CN 202132558 U CN202132558 U CN 202132558U CN 201020637016 U CN201020637016 U CN 201020637016U CN 201020637016 U CN201020637016 U CN 201020637016U CN 202132558 U CN202132558 U CN 202132558U
- Authority
- CN
- China
- Prior art keywords
- valve
- diaphragm
- valve body
- backflow preventer
- built
- 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 - Lifetime
Links
Images
Abstract
The utility model provides a built-in filter screen and a backflow preventer without a built-out piping. The backflow preventer comprises a valve 1 and a valve 2, which are in a threaded connection and communicated with each other. When a valve is closed, a valve plate 1 can move leftwards in a straight line under the action of a spring 1 and can be tightly attached to a sealing surface of the valve 1, meanwhile a valve plate 2 can move leftwards in a straight line under the action of a spring 2 and can be tightly attached to a sealing surface of a valve base. A diaphragm is disposed in a control chamber of a water outlet port, and the periphery of the diaphragm is laid on a top end surface of a sealing cushion, a lower cover can be used to cover and fix the diaphragm on the water outlet port of the valve 1, thereby the control chamber is formed. Water in the water inlet port of the valve 1 can enter the control chamber through a through-hole in the valve 1 to push the diaphragm to move upwards or downwards. By using the backflow preventer having the above mentioned structure, pressure medium in the pipe is strictly limited, only the unidirectional flow can be realized. The backflow preventer provided in the utility model is free of any built-out fittings, and has advantages of tight structure, and abilities of saving installation space, guaranteeing the safety of the supplied water, preventing pollution, and guiding the backflow medium or medium about to flow backwards in the pipe out of the pipe and forming an air isolation under any working conditions.
Description
Technical field
The utility model relates to a kind of valve mechanism, particularly a kind of built-in filter screen and the backflow preventer that need not external pipe arrangement.
Background technique
Present backflow preventer adopts " Y " type direct current type structure, and structure is longer, and a lot of improvement projects are because dimensional problem can not be carried out as scheduled, and drain valve adopts the structure in " post " shape cavity configuration or " cucurbit " shape chamber, and all control bypass tubes all adopt plug-in pipe arrangement.This structure makes its loss of head be generally 7-9 rice on the one hand, does not obtain to break through because there is the important structure design problem, so can't reduce its loss of head; As using this infrastructure product, because loss of head greatly then has too many user can not drink tap water, this is the major reason that this series products can not be promoted under existing water conditions; When diaphragm has damage, be difficult to judge whether refluence water gets into the upper reaches through bypass line, is unfavorable for water supply security on the other hand; Bypass tube is a weak spot, loses easily, is destroyed; Or utilized by the bad person and to poison, be the unsolved so far fatal problem of this series products, national governments know the significance of this type product perfectly well; But can't guarantee resident's water safety, make whole urban water supply bring great potential safety hazard because of the deadly defect of this series products.
Summary of the invention
For solving the problem that exists in the above-mentioned technology, the utility model can reach really energy-conservation, safe, anti-pollution through a kind of built-in filter screen and the backflow preventer that need not external pipe arrangement are provided, and takes up an area of little purpose.
The technological scheme that the utility model adopts provides a kind of built-in filter screen and the backflow preventer that need not external pipe arrangement; Wherein: this backflow preventer includes valve body one and valve body two through being threaded and being communicated with; Said backflow preventer comprises valve body one, valve plate one, seal ring one, spring one, valve plate two, valve seat, seal ring two, seal ring three, seal ring four, spring two, valve body two, diaphragm, sealing gasket, lower cover, filter screen; Said valve plate one is arranged on the centre that valve body one water intake supports, when closing valve plate one under the effect of spring one left straight line move on the sealing surface of being close to valve body one, valve plate two through spring two left straight line move on the sealing surface of being close to valve seat; Valve body one bottom is provided with diaphragm, sealing gasket in the control room, covers and be fastened on the bottom of valve body one through lower cover; The water of water intake directly gets into the control room epicoele through the through hole on the valve body one, and press water promotes diaphragm and contacts the lower cover sealed mouth from top to bottom, and backwater promotes to move on the diaphragm during water intake decompression.
The effect of the utility model is that the backflow preventer of this structure is a kind of strict composite set that ducted pressure medium is made one-way flow that limits; The check valve plate that its inside has two non-returns to use; The bottom has one as the hole that sluices between valve plate one and the valve plate two, and sluicing is closed and opened in this Kong Youyi hydraulic control mechanism control.During valve opening, surface of contact flowed out around the water of said discharge opening can pass through diaphragm and sealing gasket periphery.Owing to above valve body one internal surface discharge opening, be provided with filter screen, impurity screening can't be passed through from pressure relief opening.It can satisfy under any operating mode all and can ducted refluence medium or the medium that is in critical refluence " led " outside the pipe, guarantees to supply Yongan complete, prevents to pollute.The low water head loss is guaranteed in straight-through type, big area of passage design; The super-short structure guarantees to save installing space.
Description of drawings
Fig. 1 is the sectional view of the utility model normal water supply;
The sectional view that Fig. 2 stops to supply water for the utility model.
Among the figure: 1, valve body 1, valve plate 1, seal ring 1, spring 1, valve plate two
6, valve seat 7, seal ring 28, seal ring 39, seal ring 4 10, spring two
11, valve body 2 12, diaphragm 13, sealing gasket 14, lower cover 15, filter screen
Embodiment
In conjunction with accompanying drawing and embodiment the built-in filter screen of the utility model is explained with the backflow preventer structure that need not external pipe arrangement.
The built-in filter screen of the utility model is the structure that the technical field important breakthrough is arranged with the backflow preventer that need not external pipe arrangement.
Like Fig. 1, shown in 2, arrow is represented the media flow direction among Fig. 1.Built-in filter screen of the utility model and the backflow preventer that need not external pipe arrangement; This backflow preventer includes valve body 1 and valve body 2 11 through being threaded and being communicated with; Said backflow preventer comprises valve body 1, valve plate 1, seal ring 1, spring 1, valve plate 25, valve seat 6, seal ring 27, seal ring 38, seal ring 49, spring 2 10, valve body 2 11, diaphragm 12, sealing gasket 13, lower cover 14, filter screen 15; Said valve plate 1 is arranged on the centre that valve body one 1 water intakes support, when closing valve plate 1 under the effect of spring 1 left straight line move on the sealing surface of being close to valve body 1, valve plate 25 through spring 2 10 left straight line move on the sealing surface of being close to valve seat 6; Valve body one 1 bottom is provided with diaphragm 12, sealing gasket 13 in the control room, covers and be fastened on the bottom of valve body 1 through lower cover 14; The water of water intake directly gets into the control room epicoele through the through hole on the valve body 1, and press water promotes diaphragm 12 and contacts lower cover 14 sealed mouths from top to bottom, and backwater promotes to move on the diaphragm during water intake decompression.
The check valve plate that its inside has two non-returns to use is valve plate 1 and valve plate 25, and the bottom has one as the hole that sluices between valve plate 1 and the valve plate 25, and sluicing is closed and opened in this Kong Youyi hydraulic control mechanism control.
Said control room is made up of diaphragm and baffle plate below this valve body, and diaphragm moves upward and leaves sealing surface unlatching pressure release, and the contact seal face that moves downward stops pressure release, and the sealing surface of diaphragm 12 middle part lug boss branch contacts is convex portions of lower cover.
The water of water intake gets into the control room inner chamber through the through hole on this valve body 1, need not plug-in accessory, and control room inner chamber and discharge opening sealing relatively are isolated.
Said bottom discharge opening, during unlatching, surface of contact flowed out around the water of this discharge opening can pass through diaphragm and sealing gasket periphery, and when diaphragm was closed downwards, the water of discharge opening can not flow out.
There is filter screen valve body one 1 internal surface discharge openings top, can impurity can't be passed through impurity screening from pressure relief opening.
Valve plate 1 moves right with valve plate 25 during open valve, and two valve plates are moved to the left and are close to pedestal separately during cut-off valve.During proper flow, on one side medium flows into sluicing part diaphragm control room from entrance point, promote diaphragm 12 and close, the valve plate 1 of flowing through, valve plate 25 flow to the waterexit end on one side, and two groups of safety check are normally opened, forward water supply.
As shown in Figure 2, valve plate 1 is moved to the left with valve plate 25 and is close to pedestal separately when stopping to supply water; When feed-water end decompression or valve plate damage, two blocks of water that are used as between the valve plate of non-return promote diaphragms (12) and move upward, and begin to sluice.
Claims (5)
1. built-in filter screen and the backflow preventer that need not external pipe arrangement; It is characterized in that: this backflow preventer includes valve body one (1) and valve body two (11) through being threaded and being communicated with; Said backflow preventer comprises valve body one (1), valve plate one (2), seal ring one (3), spring one (4), valve plate two (5), valve seat (6), seal ring two (7), seal ring three (8), seal ring four (9), spring two (10), valve body two (11), diaphragm (12), sealing gasket (13), lower cover (14), filter screen (15); Said valve plate one (2) is arranged on the centre that valve body one (1) water intake supports; When closing valve plate one (2) under the effect of spring one (4) left straight line move on the sealing surface of being close to valve body one (1), valve plate two (5) through spring two (10) left straight line move on the sealing surface of being close to valve seat (6); Be provided with diaphragm (12), sealing gasket (13) in the control room, valve body one (1) bottom, cover and be fastened on the bottom of valve body one (1) through lower cover (14); The water of water intake directly gets into the control room epicoele through the through hole on the valve body one (1), and press water promotes diaphragm (12) and contacts lower cover (14) sealed mouth from top to bottom, and backwater promotes to move on the diaphragm during water intake decompression.
2. built-in filter screen according to claim 1 and the backflow preventer that need not external pipe arrangement; It is characterized in that: the check valve plate that said backflow preventer inside has two non-returns to use is valve plate one (2) and valve plate two (5); The bottom has one as the hole that sluices between valve plate one (2) and the valve plate two (5), and sluicing is closed and opened in this Kong Youyi hydraulic control mechanism control.
3. built-in filter screen according to claim 1 and the backflow preventer that need not external pipe arrangement; It is characterized in that: said control room is below this valve body; Form by diaphragm and baffle plate; Diaphragm moves upward and leaves sealing surface unlatching pressure release, and the contact seal face that moves downward stops pressure release, and the sealing surface of diaphragm in the control room (12) middle part lug boss branch contact is the convex portion of lower cover (14).
4. built-in filter screen according to claim 1 and the backflow preventer that need not external pipe arrangement, it is characterized in that: the water of water intake directly gets into the control room epicoele through the through hole on the valve body one (1), need not plug-in accessory.
5. built-in filter screen according to claim 1 and the backflow preventer that need not external pipe arrangement is characterized in that: valve body one (1) internal surface discharge opening top is provided with filter screen, and impurity screening can't be passed through from pressure relief opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020637016U CN202132558U (en) | 2010-12-01 | 2010-12-01 | Built-in filter screen and backflow preventer without built-out piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020637016U CN202132558U (en) | 2010-12-01 | 2010-12-01 | Built-in filter screen and backflow preventer without built-out piping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202132558U true CN202132558U (en) | 2012-02-01 |
Family
ID=45521325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020637016U Expired - Lifetime CN202132558U (en) | 2010-12-01 | 2010-12-01 | Built-in filter screen and backflow preventer without built-out piping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202132558U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486237A (en) * | 2010-12-01 | 2012-06-06 | 刘永 | Backflow preventer with built-in filter screen and no external piping |
| CN102865389A (en) * | 2012-08-30 | 2013-01-09 | 杭州春江阀门有限公司 | Water hammer resistant backflow preventer |
-
2010
- 2010-12-01 CN CN201020637016U patent/CN202132558U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486237A (en) * | 2010-12-01 | 2012-06-06 | 刘永 | Backflow preventer with built-in filter screen and no external piping |
| CN102865389A (en) * | 2012-08-30 | 2013-01-09 | 杭州春江阀门有限公司 | Water hammer resistant backflow preventer |
| CN102865389B (en) * | 2012-08-30 | 2014-01-08 | 杭州春江阀门有限公司 | Water hammer resistant backflow preventer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101749460A (en) | Dual-membrane micro-resistant ultrashort backflow preventer | |
| CN102486237A (en) | Backflow preventer with built-in filter screen and no external piping | |
| CN202056363U (en) | Dual-diaphragm micro-resistance ultrashort backflow preventer | |
| CN101749461B (en) | Screw-thread backflow prevention device being free from being equipped with external conduit | |
| CN202132558U (en) | Built-in filter screen and backflow preventer without built-out piping | |
| CN202597807U (en) | Copper-plastic composite decompression type backflow preventer | |
| CN201739573U (en) | Backflow preventer for water meter | |
| CN203223591U (en) | Four-way valve for water dispenser | |
| CN201739574U (en) | Right angle type backflow preventing device | |
| CN203009918U (en) | Decompression split-flow valve and water purification machine formed by decompression split-flow valve | |
| CN201739572U (en) | Miniature backflow preventer | |
| CN201215199Y (en) | Double-diaphragm ultra-short backflow preventer | |
| CN207228264U (en) | A kind of one-in-and-two-out solenoid valve | |
| CN203223594U (en) | Low-resistance exhaust type backflow preventing device | |
| CN204878879U (en) | Miniature backflow preventer of economizing on water | |
| CN207005414U (en) | A kind of favourable opposition valve with corrosion-resistant structure | |
| CN218670706U (en) | Fluid control valve | |
| CN202733133U (en) | Circular automatic exhaust valve | |
| CN210318548U (en) | Double-seal water inlet butterfly valve with maintenance seal locking device | |
| CN201057305Y (en) | Combined valve | |
| CN102147026A (en) | Micro backflow preventer | |
| CN219922878U (en) | Liquid guide mechanism at bottom of packed tower | |
| CN203670961U (en) | Special valve for pressure-bearing water storage equipment | |
| CN208221674U (en) | A kind of Multifunctional anti-collapse flow shutoff valve | |
| CN211820748U (en) | Electric control valve with filtering function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120201 |
|
| CX01 | Expiry of patent term |