CN2149532Y - Slow-stop butterfly check valve - Google Patents
Slow-stop butterfly check valve Download PDFInfo
- Publication number
- CN2149532Y CN2149532Y CN 93206173 CN93206173U CN2149532Y CN 2149532 Y CN2149532 Y CN 2149532Y CN 93206173 CN93206173 CN 93206173 CN 93206173 U CN93206173 U CN 93206173U CN 2149532 Y CN2149532 Y CN 2149532Y
- Authority
- CN
- China
- Prior art keywords
- valve
- valve plate
- check valve
- butterfly check
- slow
- 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
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- Details Of Valves (AREA)
Abstract
The utility model relates to a slow-close butterfly check valve which is formed by adding a hydraulic slow-close device on the basis of the traditional butterfly check valve. The slow-close butterfly check valve is opened by depending on the pressure of the medium in a pipeline as same as the traditional butterfly check valve. The different point is that the close of the slow-close butterfly check valve is not as rapid as that of the traditional butterfly check valve, but the close is realized by the control of the hydraulic slow-close device. Consequently, the 'water hammer' effect which has the damaging effect to the pipeline caused by the rapid close of a valve plate is effectively avoided, and the safety of the pipeline is ensured.
Description
The utility model relates to a kind of butterfly check valve, particularly a kind of butterfly check valve closed slowly with Slow Close function.
Traditional butterfly check valve is made up of valve body, valve seat, valve plate, valve plate pivot, torsion spring and spring fixed pin shaft etc., valve plate pivot and spring fixed pin shaft all are fixed on the valve body, valve plate be about two, all semicircular in shape is hinged on the valve plate pivot, and torsion spring is on the valve plate pivot, the one end is fixed on the spring fixed pin shaft, the other end compressing is on valve plate, and torsion spring is two, respectively with about two valve plates corresponding.During no positive pressure media flow, valve plate is cooperated with valve base sealing by the pressure effect of spring in pipeline.When ducted medium positive pressure surpasses to a certain degree, overcome the pressure of torsion spring and valve plate is opened.In case pressure medium disappears, valve plate just can be closed rapidly under the effect of torsion spring automatically.That this butterfly check valve has is simple in structure, open and close flexibly, the characteristics of reliable operation.But,, can in pipeline, form a kind of " water hammer " effect because the speed of valve plate when closing is very fast.Pipe medium pressure is high more, and this " water hammer " when valve plate is closed effect Shaoxing opera is strong, tends to so pipeline is suffered damage.
At the above-mentioned deficiency of traditional butterfly check valve, the utility model provides a kind of butterfly check valve with Slow Close function just, to alleviate or " water hammer " effect when eliminating valve plate and closing.
The purpose of this utility model realizes by following measure: the utility model mainly comprises valve body, valve seat, valve plate, valve plate pivot, torsion spring and spring fixed pin shaft etc., valve plate pivot and spring fixed pin shaft all are fixed on the valve body, valve plate be about two, equal semicircular in shape, be hinged on the valve plate pivot, torsion spring is on the valve plate pivot, and the one end is fixed on the spring fixed pin shaft; The other end compressing is on valve plate, and torsion spring is two; Respectively with about two valve plates corresponding, it is characterized in that: device has two hydraulic pressure slow closing devices on the valve body of medium inlet one side, respectively with about the outer rim of two valve plates corresponding, the hydraulic pressure slow closing device comprises barrier film, oil sump, unidirectional series flow control valve, oil cylinder, piston, barrier film communicates with the chamber, medium inlet of valve body, oil sump is between barrier film and unidirectional series flow control valve, and unidirectional series flow control valve communicates by oil pipe with oil cylinder, and piston does not have certain clearance before stretching out and between the valve plate of operating position.
For the ease of the hydraulic pressure wet goods that the exhaust and the discharging of oil cylinder cavity piston one end may be leaked into, establish a pollution discharge pond on the valve body in addition, this pollution discharge pond communicates with cavity piston one end of oil cylinder by discharge pipe.
Accompanying drawing has provided an embodiment of the present utility model.
The drawing of accompanying drawing is described as follows:
Fig. 1 is a plan view of the present utility model.
Fig. 2 is the A-A sectional view.
Below in conjunction with accompanying drawing the utility model is further described.
As figure, the utility model mainly comprises valve body (2), valve seat (20), valve plate, valve plate pivot (14), torsion spring and spring fixed pin shaft (15) etc., valve plate pivot and spring fixed pin shaft all are fixed on the valve body, valve plate be about two (1) (9), all semicircular in shape is hinged on the valve plate pivot, torsion spring (8) (12) is on the valve plate pivot, corresponding with valve plate (1) (9) respectively, the one end is fixed on the spring fixed pin shaft, and the other end is oppressed on valve plate.In the present embodiment, valve seat (20) is the part of valve body (2), is surrounded by sealing material on the valve plate.Device has two hydraulic pressure slow closing devices on the valve body of medium inlet one side, corresponding with the outer rim of valve plate (1) (9) respectively, the hydraulic pressure slow closing device comprises barrier film (4), oil sump (5), unidirectional series flow control valve (6), oil cylinder (18), piston (19), barrier film (4) communicates with the chamber, medium inlet (7) of valve body, oil sump is between barrier film and unidirectional series flow control valve, unidirectional series flow control valve communicates by oil pipe (3) with oil cylinder, and piston does not have certain clearance before stretching out and between the valve plate of operating position.Establish a pollution discharge pond (11) on the valve body (2) in addition, this pollution discharge pond communicates with oil cylinder cavity piston one end (13) by discharge pipe (10).Among the figure, (17) are oil connection, and (16) are the discharge pipe joint.
Working principle of the present utility model is as follows: when the entrance point pressure medium surpasses the outlet end certain value, can open at the differential pressure action lower valve plate and to put in place.Meanwhile, barrier film moves upward under the effect of pressure medium, and the hydraulic oil of propagation of pressure in the oil sump, hydraulic oil enters oil cylinder by unidirectional series flow control valve and oil pipe, and the piston that promotes in the oil cylinder is protruding, for later Slow Close is got ready.When medium pump quit work, medium began to reflux, under the effect of the power-assist power of backflow power and spring, the valve plate quick closedown is to offseting with the piston that has stretched out, then carry out Slow Close, treat after the water hammer peak, just realize closing fully according to the speed that in advance unidirectional modulating valve is regulated.
This butterfly check valve closed slowly provided by the utility model has kept the advantage of traditional butterfly check valve fully, has the Slow Close function simultaneously, and Slow Close speed can regulate as required, can eliminate the water hammer influence effectively, thereby guarantee the safety of whole pipeline.
Claims (2)
1, a kind of butterfly check valve closed slowly, it mainly comprises valve body (2), valve seat (20), valve plate, valve plate pivot (14), torsion spring and spring fixed pin shaft compositions such as (15), valve plate pivot and spring fixed pin shaft all are fixed on the valve body, valve plate be about two (1) (9), equal semicircular in shape, be hinged on the valve plate pivot, torsion spring is on the valve plate pivot, the one end is fixed on the spring fixed pin shaft, the other end compressing is on valve plate, torsion spring is two (8) (12), respectively with about two valve plates corresponding, it is characterized in that: device has two hydraulic pressure slow closing devices on the valve body of medium inlet one side, respectively with about the outer rim of two valve plates corresponding, the hydraulic pressure slow closing device comprises barrier film (4), oil sump (5), unidirectional series flow control valve (6), oil cylinder (18), piston (19), barrier film (4) communicates with the chamber, medium inlet (7) of valve body, oil sump is between barrier film and unidirectional series flow control valve, unidirectional series flow control valve communicates by oil pipe (3) with oil cylinder, and piston does not have certain clearance before stretching out and between the valve plate of operating position.
2, butterfly check valve closed slowly according to claim 1 is characterized in that: establish a pollution discharge pond (11) on the valve body in addition, this pollution discharge pond communicates with cavity piston one end (13) of oil cylinder by discharge pipe (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93206173 CN2149532Y (en) | 1993-03-05 | 1993-03-05 | Slow-stop butterfly check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93206173 CN2149532Y (en) | 1993-03-05 | 1993-03-05 | Slow-stop butterfly check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2149532Y true CN2149532Y (en) | 1993-12-15 |
Family
ID=33789246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93206173 Expired - Fee Related CN2149532Y (en) | 1993-03-05 | 1993-03-05 | Slow-stop butterfly check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2149532Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089876C (en) * | 1998-05-22 | 2002-08-28 | 王陆军 | Dual-axle hydraulic butterfly check valve closed slowly |
| WO2008058454A1 (en) * | 2006-11-16 | 2008-05-22 | Neway Valve (Suzhou) Co., Ltd | A counter-clamping check valve of double valve flaps |
| CN102818051A (en) * | 2012-09-05 | 2012-12-12 | 浙江超达阀门股份有限公司 | Check valve capable of reducing pressure of water hammer |
-
1993
- 1993-03-05 CN CN 93206173 patent/CN2149532Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089876C (en) * | 1998-05-22 | 2002-08-28 | 王陆军 | Dual-axle hydraulic butterfly check valve closed slowly |
| WO2008058454A1 (en) * | 2006-11-16 | 2008-05-22 | Neway Valve (Suzhou) Co., Ltd | A counter-clamping check valve of double valve flaps |
| CN102818051A (en) * | 2012-09-05 | 2012-12-12 | 浙江超达阀门股份有限公司 | Check valve capable of reducing pressure of water hammer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |