CN201739622U - Drainer function detection device for a back flow prevention device - Google Patents
Drainer function detection device for a back flow prevention device Download PDFInfo
- Publication number
- CN201739622U CN201739622U CN 201020271415 CN201020271415U CN201739622U CN 201739622 U CN201739622 U CN 201739622U CN 201020271415 CN201020271415 CN 201020271415 CN 201020271415 U CN201020271415 U CN 201020271415U CN 201739622 U CN201739622 U CN 201739622U
- Authority
- CN
- China
- Prior art keywords
- hole
- valve
- vertical
- spool
- valve seat
- 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 relates to a drainer function detection device of a back flow prevention device, comprising a valve body flange, a valve cover flange and a film clamped between the valve body flange and the valve cover flange, characterized in that: a vertical through hole is opened on the vertical direction of the valve cover flange surface and a valve seat is mounted on the lower port of the vertical through hole; a valve core and a connection control device of the valve core and the valve cover flange surface are mounted on the upper surface of the valve seat; a horizontal through hole is opened on the valve cover flange and communicated with the vertical through hole; a horizontal groove is opened on the valve body flange at the position corresponding with the vertical through hole of the valve cover flange; a valve hole is opened on the film at the position corresponding with the vertical through hole of the valve cover flange. The drainer function detection device has features of simple structure, convenient operation, high trust degree and direct view and detects the function of the drainer at any time.
Description
Technical field
The utility model relates to a kind of valve, relates in particular to a kind of dirty stream isolating valve.
Background technique
Backflow preventer claims dirty stream isolating valve again, is the safety features of a kind of strictness polluted source when preventing that the Drinking Water pipeline from taking place to reflux.Decompression type backflow preventer is made up of the hydathode of two safety check that separate and a centre.Because its function admirable, reliable operation is widely adopted at present.It reaches the hydathode 3 that communicates with intermediate cavity by inlet check valve 1, outlet non-return valve 5, intermediate cavity 4 forms, and the epicoele of hydathode diaphragm 8 is connected with the entrance point of inlet check valve 1 with pipeline 7.The working principle of backflow preventer is: during normal water supply, high-pressure medium overcomes check-valve spring 1, the resistance of check-valve spring 26, supply water to the user through intermediate cavity 4, at this moment, resistance and the overcurrent loss of head of medium because of overcoming inlet check valve spring 2, make inlet pressure P1 be higher than intermediate cavity pressure P 2, because the import high pressure water enters the epicoele of hydathode diaphragm 8 by pipeline 7, and the cavity of resorption of diaphragm communicates with intermediate cavity 4, make the diaphragm upper and lower cavity produce pressure reduction, this pressure reduction overcomes the resistance of hydathode spring 9, and it is downward to promote valve rod 10, flap 11 is pressed on the valve seat 1, and hydathode cuts out; If inlet pressure P1 descends, when inlet check valve 1 front and back pressure reduction drops to setting value, the spring 9 of hydathode promotes valve rod 10 upwards, flap lifts off a seat 12, hydathode is opened pressure release, when pressure release when returning to setting value with import pressure reduction, hydathode cuts out again, and ductwork pressure P3 raises behind valve, when surpassing before the valve inlet pressure P1, if this moment, the bad seals of outlet non-return valve 5 produced leakage, then intermediate cavity pressure P 2 raises, and causes diaphragm 8 upper and lower cavity pressure reduction to reduce, and hydathode is opened, the draining pressure release is not so can flow backwards back into the mouth safety check; If negative pressure appears in the import medium, this moment, drain opening under the effect of spring 9 was opened fully, and air enters, and formed air and cut off, and prevented siphon refluence phenomenon.
From above analysis as can be known, can hydathode proper functioning, directly have influence on backflow preventer and bring into play due function.In case hydathode breaks down, backflow preventer just loses its function so.In a single day the backflow preventer of prior art does not all have the hydathode function detection device, finds in the using process that sewage flows backwards, just carry out the complete machine dissembling inspection, but this moment the large amount of sewage refluence has taken place generally, has polluted the water source.
Summary of the invention
The utility model main purpose is to solve the existing in prior technology deficiency, thereby develops a kind of hydathode function detection device that is used for backflow preventer.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of hydathode function detection device that is used for backflow preventer,
Have valve flange, bonnet flange and be clamped in diaphragm between the two,
It is characterized in that:
Vertical direction at described bonnet flange face has vertical through hole, at the end opening of described vertical through hole valve seat is housed, and the control gear that is connected of spool and spool and bonnet flange face is housed on valve seat;
Have horizontal through hole on bonnet flange, described horizontal through hole is communicated with vertical through hole;
With the valve flange of bonnet flange vertical through hole opposite position on, have horizontal slot;
With the diaphragm of bonnet flange vertical through hole opposite position on have through hole.
The technical solution of the utility model can also be further perfect:
As the preferred version of valve seat,
Be provided with the annular sword limit that raises up above the described valve seat.
As one of control gear preferred version,
Described connection control gear comprises the regulating valve seat that is installed between spool and the bonnet flange;
Above the described regulating valve seat protective cap is arranged.
As two of control gear preferred version,
Described connection control gear comprises the clamping sleeve that is installed between spool and the bonnet flange;
Between described spool and the valve seat sealing gasket is arranged;
Spool outside between described clamping sleeve and the sealing gasket is with spring;
Above the described spool draw ring is arranged.
The beneficial effects of the utility model are: simple in structure, easy to operate, and the reliability height, directly perceived, can be at any time the function of hydathode be detected.
Description of drawings
Accompanying drawing 1 is the backflow preventer structural representation of prior art;
Accompanying drawing 2 is sectional views of Fig. 1;
Accompanying drawing 3 is a kind of structural representations of the present utility model;
Accompanying drawing 4 is another kind of structural representations of the present utility model.
Description of reference numerals: inlet check valve 1, check-valve spring 1, hydathode 3, intermediate cavity 4, outlet non-return valve 5; check-valve spring 26, pipeline 7, hydathode diaphragm 8, hydathode spring 9, valve rod 10; flap 11, valve seat 1, protective cap 13, seal ring 1, regulating valve seat 15; sealing gasket 1, spool 1, valve seat 18, draw ring 19; clamping sleeve 20, spool 2 21, spring 22, seal ring 2 23; sealing gasket 2 24, inlet pressure P1, intermediate cavity pressure P 2, ductwork pressure P3.
Embodiment
Below by embodiment also in conjunction with the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment 1:
As shown in Figure 3, this device is arranged on the position of hydathode bonnet flange and valve flange clamping diaphragm, is made up of protective cap 13, seal ring 1, regulating valve seat 15, sealing gasket 1, spool 1 and valve seat 18.The material of regulating valve seat and regulating spool is a stainless steel, and valve seat 18 is a teflon, and the upper-end surface is provided with annular sword limit, and there is through hole at the center, and the diaphragm relevant position is provided with circular hole, in order to hold valve seat 18; A rectangular cavity A has been dug in the relevant position of bonnet flange, in order to be communicated with the central through bore of diaphragm 8 epicoeles and valve seat 18; The relevant position of valve flange has groove B, in order to the cavity of resorption of connection diaphragm 8 and the central through bore of valve seat 18.
Generally, tighten regulating spool 1, spool end is closely contacted with the annular sword limit of valve seat 18 upper ends, the medium of diaphragm 8 upper and lower cavities does not communicate, hydathode 3 not drainings.When needs are checked the function of hydathode, regulating spool 1 is withdrawed from, lift off a seat 18 annular sword limit of its end face, diaphragm 8 upper and lower cavities communicate, and high-pressure medium enters the diaphragm cavity of resorption from flow through central through bore, the groove B of hole A, valve seat 18 of diaphragm epicoele, and cavity pressure increases under the diaphragm, when diaphragm upper and lower cavity pressure reduction during less than setting value, spring 9 promotes valve rod 10 upwards, and flap 11 lifts off a seat 12, and medium is discharged from drain opening.Repeatedly test several times, if drain valve draining when recording spool 17 and withdrawing from, not draining when tightening can confirm that so the function of hydathode is normal; If hydathode draining situation is unusual, dissembling inspection so in time or more renew.
Embodiment 2:
Fig. 4 is the another kind of scheme of this device, also is arranged on the position that bonnet flange and valve flange clamp diaphragm, is made up of draw ring 19, clamping sleeve 20, spool 2 21, spring 22, seal ring 2 23, sealing gasket 2 24 and valve seat 18.Generally, sealing gasket 24 is pressed on the annular sword limit of valve seat 18 upper ends under the pressure of spring 22, and the diaphragm upper and lower cavity is obstructed, not draining of hydathode.When needs are checked the hydathode function, as long as catch on draw ring 19, be pulled upwardly spool 2 21 and get final product with hand, this moment, the diaphragm upper and lower cavity communicated the hydathode draining.After checking end, loosen draw ring 19, spool 2 21 moves down under the spring force effect, again sealing gasket is pressed on the annular sword limit of valve seat the sealing of diaphragm upper and lower cavity, not draining of hydathode.Other is identical with Fig. 3.This form is more suitable for family expenses small dimension backflow preventer.
Claims (4)
1. hydathode function detection device that is used for backflow preventer,
Have valve flange, bonnet flange and be clamped in diaphragm between the two, it is characterized in that:
Vertical direction at described bonnet flange face has vertical through hole, at the end opening of described vertical through hole valve seat is housed, and the control gear that is connected of spool and spool and bonnet flange face is housed on valve seat;
Have horizontal through hole on bonnet flange, described horizontal through hole is communicated with vertical through hole;
With the valve flange of bonnet flange vertical through hole opposite position on, have horizontal slot;
With the diaphragm of bonnet flange vertical through hole opposite position on have through hole.
2. the hydathode function detection device that is used for backflow preventer according to claim 1 is characterized in that:
Be provided with the annular sword limit that raises up above the described valve seat.
3. the hydathode function detection device that is used for backflow preventer according to claim 1 and 2 is characterized in that:
Described connection control gear comprises the regulating valve seat that is installed between spool and the bonnet flange;
Above the described regulating valve seat protective cap is arranged.
4. the hydathode function detection device that is used for backflow preventer according to claim 1 and 2 is characterized in that:
Described connection control gear comprises the clamping sleeve that is installed between spool and the bonnet flange;
Between described spool and the valve seat sealing gasket is arranged;
Spool outside between described clamping sleeve and the sealing gasket is with spring;
Above the described spool draw ring is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020271415 CN201739622U (en) | 2010-07-26 | 2010-07-26 | Drainer function detection device for a back flow prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020271415 CN201739622U (en) | 2010-07-26 | 2010-07-26 | Drainer function detection device for a back flow prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201739622U true CN201739622U (en) | 2011-02-09 |
Family
ID=43554897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020271415 Expired - Lifetime CN201739622U (en) | 2010-07-26 | 2010-07-26 | Drainer function detection device for a back flow prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201739622U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987207A (en) * | 2016-05-27 | 2016-10-05 | 杭州春江阀门有限公司 | Pressure relief type backflow prevention device with tiny resistance |
-
2010
- 2010-07-26 CN CN 201020271415 patent/CN201739622U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987207A (en) * | 2016-05-27 | 2016-10-05 | 杭州春江阀门有限公司 | Pressure relief type backflow prevention device with tiny resistance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101852302B (en) | Low-resistance self-discharge backflow preventer | |
| US2213753A (en) | Valve | |
| CN103696470B (en) | Three-cavity self-closing time-delay flushing valve core | |
| US4241752A (en) | Backflow preventer | |
| CN201739622U (en) | Drainer function detection device for a back flow prevention device | |
| CN205781131U (en) | Micro-resistance pressure reduction type backflow preventer | |
| CN202733017U (en) | Hand stop valve | |
| CN203549044U (en) | Large-flow breakaway coupling | |
| CN201739574U (en) | Right angle type backflow preventing device | |
| CN101210425A (en) | Municipal ductwork pressure protector | |
| CN201687791U (en) | Rectifier valve sealed by spherical surface | |
| CN202188174U (en) | Hose check valve | |
| CN203546855U (en) | Three-cavity self-closing type delayed flushing valve element | |
| CN202402383U (en) | Stacked pressure relief valve | |
| CN208486092U (en) | A kind of connecting pipe with water installations and tap of automatic washing machine | |
| CN201696681U (en) | Low resistance self-discharging backflow preventer | |
| CN201037565Y (en) | Municipal ductwork pressure_ protector | |
| CN213685414U (en) | Backflow preventer capable of preventing valve clack from falling off | |
| CN202132558U (en) | Built-in filter screen and backflow preventer without built-out piping | |
| CN204140998U (en) | A kind of improvement valve | |
| CN2856659Y (en) | Auto closing valve when stopping supply | |
| CN215908475U (en) | Novel vacuum breaker valve | |
| CN102425695A (en) | Water faucet capable of automatically closing during cut-off of water supply | |
| CN209385662U (en) | A kind of new construction lowest liquid level valve | |
| CN201999813U (en) | Water purification storage barrel and pure water machine with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110209 |
|
| CX01 | Expiry of patent term |