CN201810835U - External hanging type drainer for backflow arrester - Google Patents
External hanging type drainer for backflow arrester Download PDFInfo
- Publication number
- CN201810835U CN201810835U CN201020529952XU CN201020529952U CN201810835U CN 201810835 U CN201810835 U CN 201810835U CN 201020529952X U CN201020529952X U CN 201020529952XU CN 201020529952 U CN201020529952 U CN 201020529952U CN 201810835 U CN201810835 U CN 201810835U
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- Prior art keywords
- valve body
- piston
- backflow
- valve
- arrester
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- Expired - Lifetime
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Abstract
The utility model relates to an external hanging type drainer for a backflow arrester, which comprises a valve body and is characterized in that: the upper part of the valve body has a water inlet end, and the lower part of the valve body has a water outlet end; left and right reciprocating pistons are arranged in the valve body transversely; and the left piston is communicated with the water inlet end of a main valve of the backflow arrester and forms a front pressure cavity, the right piston is communicated with the water outlet end of the main valve of the backflow arrester and forms a rear pressure cavity, and the left piston is provided with a sealing base for sealing the water outlet of the valve body. The device has a simple structure, can guarantee that water in the cavity of a check valve is drained smoothly after the check valve is closed, and is safe and reliable.
Description
Technical field
The utility model relates to a kind of valve, particularly a kind of backflow preventer external hanging type hydathode.
Background technique
At present, because the fast development of urban construction, the requirement of tap water quality is improved constantly, and existing safety check is mainly used in the one-way flow that guarantees water. prevent aqueous reflux. but do not have antifouling property, when the non-return sealing surface lost efficacy, can not effectively prevent the backflow pollution of sealing.In water supply line, backflow preventer is as effective facility of tap water supply water quality safety, obtained using widely, in case the backing up of sewage phenomenon takes place, sewage in the valve body must be discharged by external hydathode, and this hydathode must effectively be guaranteed to be in closed condition under the normal water supply state.
Summary of the invention
The purpose of this utility model is to provide a kind of backflow preventer external hanging type hydathode, and this device is not only simple in structure, and can effectively guarantee after the check device sealing of backflow preventer the water in the main valve chamber to be discharged smoothly, and is safe and reliable.
The technical solution of the utility model is: a kind of backflow preventer external hanging type hydathode, comprise valve body, it is characterized in that: described valve body top is provided with feed-water end, the bottom is provided with the waterexit end, be horizontally set with reciprocal left and right sides piston in the valve body, described left piston communicates with the feed-water end of main valve and forms preceding pressure chamber, and described right piston is connected with the waterexit end of main valve and forms the back pressure chamber, and described left piston is provided with in order to seal the sealing seat of valve body water outlet.
Be provided with the Returnning spring that is used to make the piston return between described left piston and the left valve gap.
Advantage of the present utility model is: simple in structure, size is little, safeguards simply, is convenient to install; When adverse current takes place when, can effectively the liquid in the backflow preventer main valve be discharged fast, guarantee that adverse current sewage can not recharge in the water supply line.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a user mode schematic representation of the present utility model.
Embodiment
A kind of backflow preventer external hanging type hydathode, comprise valve body 1, it is characterized in that: described valve body top is provided with feed-water end 2, the bottom is provided with waterexit end 3, be horizontally set with reciprocal left and right sides piston in the valve body, described left piston 4 communicates with the feed-water end 6 of the main valve 5 of backflow preventer and forms preceding pressure chamber 7, and described right piston 8 is connected with the waterexit end 9 of the main valve of backflow preventer and forms back pressure chamber 10, and described left piston is provided with the sealing seat 12 in order to seal valve body water outlet 11.
In order to ensure hydathode under the normal water supply condition can guarantee to close and need to transfer to when hydathode the process of closed condition from opening state piston can be automatically return successfully, be provided with the Returnning spring 13 that is used to make the piston return between described left piston and the left valve gap 14.
Working procedure of the present utility model is as follows: the outside that hydathode is installed on the main valve of backflow preventer, the feed-water end of upper end communicates with the safety check inner chamber, the waterexit end of lower end communicates with atmosphere, be horizontally set with reciprocal left and right sides piston in the valve body, described left piston communicates with the feed-water end of safety check and forms preceding pressure chamber, described right piston is connected with the waterexit end of the main valve of backflow preventer and forms the back pressure chamber, and the unlatching of hydathode is controlled in the variation of dependence pressure at both sides; When normal water supply, the main valve check device is in the water flowing state of opening, the inlet pressure P1 of main valve is greater than outlet pressure P3, be P1〉P3, the pressure of pressure chamber is greater than the pressure of back pressure chamber for hydathode and before the Yan Zeyou, the left piston that pressure difference promotes to have sealing seat is to taking exercises, and the sealing seat of left piston seals the valve seat of hydathode, and hydathode cuts out automatically; After the safety check non-return is closed, outlet pressure is greater than inlet pressure, be P1≤P3, the pressure of pressure chamber is smaller or equal to the pressure of back pressure chamber for hydathode and before the Yan Zeyou, this pressure difference promotes the right piston motion of hydathode, drives left piston by piston rod and moves right together, and the sealing seat of left piston leaves the valve seat of hydathode, hydathode is opened automatically, with the mediator depletion in the main valve intermediate cavity.In case leak, hydathode then can keep full-gear always, and keeps maximum draining pollution discharge capability, and the medium that is leaked can directly flow out outside the valve body.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (2)
1. backflow preventer external hanging type hydathode, comprise valve body, it is characterized in that: described valve body top is provided with feed-water end, the bottom is provided with the waterexit end, be horizontally set with reciprocal left and right sides piston in the valve body, described left piston communicates with the feed-water end of backflow preventer main valve and forms preceding pressure chamber, and described right piston is connected with the waterexit end of backflow preventer main valve and forms the back pressure chamber, and described left piston is provided with in order to seal the sealing seat of valve body water outlet.
2. backflow preventer external hanging type hydathode according to claim 1 is characterized in that: be provided with the Returnning spring that is used to make the piston return between described left piston and the left valve gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020529952XU CN201810835U (en) | 2010-09-15 | 2010-09-15 | External hanging type drainer for backflow arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020529952XU CN201810835U (en) | 2010-09-15 | 2010-09-15 | External hanging type drainer for backflow arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810835U true CN201810835U (en) | 2011-04-27 |
Family
ID=43893776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020529952XU Expired - Lifetime CN201810835U (en) | 2010-09-15 | 2010-09-15 | External hanging type drainer for backflow arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810835U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518491A (en) * | 2018-04-13 | 2018-09-11 | 山西平阳重工机械有限责任公司 | A kind of two-way pneumatic control valve |
-
2010
- 2010-09-15 CN CN201020529952XU patent/CN201810835U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518491A (en) * | 2018-04-13 | 2018-09-11 | 山西平阳重工机械有限责任公司 | A kind of two-way pneumatic control valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Fuxing Road, Jinan District, Fuzhou city of Fujian province 350014 No. 49 No. 3 No. 7 No. -8 store Patentee after: Fujian spring brand valve Polytron Technologies Inc Address before: Jinan District of Fuzhou City, Fujian province 350014 New Town Industrial Park soup oblique mill Patentee before: Fujian High & Intermediate Voltage Valve Technology Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
|
| CX01 | Expiry of patent term |