CN85202944U - Controllable rotating water resistance slow closing non-return valve - Google Patents
Controllable rotating water resistance slow closing non-return valve Download PDFInfo
- Publication number
- CN85202944U CN85202944U CN 85202944 CN85202944U CN85202944U CN 85202944 U CN85202944 U CN 85202944U CN 85202944 CN85202944 CN 85202944 CN 85202944 U CN85202944 U CN 85202944U CN 85202944 U CN85202944 U CN 85202944U
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- Prior art keywords
- valve
- water
- piston
- water resistance
- slow
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 230000002265 prevention Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009428 plumbing Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 241000009298 Trigla lyra Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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- Check Valves (AREA)
Abstract
The utility model discloses a controllable rotating water resistance slow-closing non-return valve, belonging to the backflow-preventing water hammer-preventing device of water discharge pipes, and comprising a valve body, a hydraulic cylinder, a slow-closing regulation valve and a control pipeline. The valve body comprises a valve clack, a rocking lever, a shaft fixed on the casing of the valve of the utility model and a connecting rod connected with the lower surface of a piston in the hydraulic cylinder, the upper surface of the piston is connected with a piston rod. The slow-closing regulation valve comprises a one-way valve and an adjustable needle valve. When a pump has a failure, the controllable rotating water resistance slow-closing non-return valve can control that water flows back, and has the function of water hammer prevention and the protection of water pumps and pipelines; meanwhile, the closing speed of the valve of the utility model is adjustable.
Description
The utility model belongs to preventing aqueous reflux and preventing the device of water hammer of plumbing piping.
The cited paper of prior art:
The Shanxi water conservancy science and technology first phase in 1980, " closing the valve water hammer " author Peng Longsheng about check valve
The U.S., No. 4188973 patents
The present both at home and abroad common Swing check valve that adopts, it can not prevent water attack, as figure (1).When pumping accident, ducted water flow velocity reduces, and can occur flowing backwards, and this moment, impact of water was closed valve rapidly, because valve closes too fastly, caused huge water attack in pipeline, caused the pipeline explosion.When normal operation, because flap (8) swims in the water, then also swing thereupon of flap (8) of flow fluctuation makes and revolves that to open axle (10) abrasion bigger, in case the axle breakdown also can cause huge quick-fried body water hammer accident.
The utility model is the controlled buffer valve of inventing for the shortcoming that overcomes common Swing check valve of rotary-open type water resistance.When in the plumbing piping during pumping accident, this valve can be controlled aqueous reflux, thereby realizes that adjustable Slow Close that closes slowly prevents to close the valve water hammer, protection water pump and pipeline.
Fig. 1, common Swing check valve generalized section.
Fig. 2, the controlled buffer valve generalized section of rotary-open type water resistance.
Fig. 3, the controlled buffer valve A of rotary-open type water resistance is to schematic representation.
Fig. 4, Slow Close modulating valve generalized section.
Basic point of the present utility model be this valve by valve body (1), hydraulic cylinder (2), Slow Close control valve (3) and the three's of UNICOM control piper (4), (5), (6), (7) form. Flap (8) is arranged in the valve body (1), and rocking bar (9) is fixed on the axle (10) on the valve shell, connecting rod (11). And in the hydraulic cylinder (2), have a upper surface to be connected with piston rod (13), the piston (12) that lower surface is connected with connecting rod (11). The upper position, hole (16) of hydraulic cylinder cylinder barrel (15) is cylinder barrel length 1/3rd to 1/4th places from the cylinder bottom distance.
Below in conjunction with accompanying drawing 1,2,3,4 further set forth content of the present utility model and working principle.
The controlled buffer valve of rotary-open type water resistance is installed in the pump outlet pipeline.Water flows in the valve from figure (2) inlet (20) when opening pump, flap (8) is subjected to the impact of water effect, rotate around axle (10) inhour that is fixed on the valve shell (22) with rocking bar (9), drivening rod (11) moves upward simultaneously, thereby promotion piston (12) and piston rod (13) move upward.When piston (12) is positioned at the below in hole (16) and just in time blocks hole (16) (seeing Fig. 3), water in the piston upper chamber flows into pilot line (6) through pilot line (4) and (5), this moment since the last inlet (26) of Slow Close modulating valve (3) than following inlet (25) pressure height (seeing Fig. 4), the position that nonreturn valve core (14) is in out, so water can successfully flow into pilot line (7) through Slow Close modulating valve (3) from pilot line (6), enters valve body (1) (seeing Fig. 3) at last.When piston (12) moved to top, hole (16), the water in piston (12) upper chamber mainly flowed into pilot line (5) by pilot line (4), enters piston lower chamber (17), thereby realized quick closedown.
Normal operation, flap (8) reaches the greatest limit position, and stable the swing with flow fluctuation of flap is because the upper and lower surperficial pressure-bearing surface of piston (12) does not wait, a differential force that makes progress is arranged, connecting rod (11) pulling rocking bar (9) makes it be stabilized in limit position thus, and this has just overcome the flap swing that common Swing check valve causes because of flow fluctuation.
During pumping accident, the flow that flows to inlet (20) reduces (seeing Fig. 2), and the suffered impact of water of flap (8) reduces, under the self gravitation effect, flap (8) together with rocking bar (9) around stationary axle (10), clockwise direction rotary closing.While connecting rod (11), piston (12), piston rod (13) also descends.When piston (12) moves to top, hole (16) (seeing Fig. 3), water in piston (12) lower chamber is mainly by hole (16), (see Fig. 2 in the chamber on pilot line (5), (4) inflow piston top, 3), piston (12) is descended rapidly, rocking bar (9) is rotation smoothly, and flap (8) is closed rapidly.During position below piston (12) moves downward hole (16), the pressure height (seeing Fig. 4) that the following inlet (25) of Slow Close series flow control valve (3) is located than last inlet (26), so nonreturn valve core (14) is closed.Water in piston (12) upper chamber can only be from valve body (1) through pilot line (7), gap (29) between the Throttle needle valve (27) of Slow Close modulating valve (3) and the valve body (28) of modulating valve flows into filling pipe end (26), by pilot line (6), (5) (4) are replenished again.Metering pin valve (27) can change the circulation area of gap (29), and its regulation range is 0 to 500mm
2, the beat setting scope is 0 to 50mm
2Because circulation area is little, the additional of water is obstructed in the piston upper chamber, and piston (12) rate of descent is slow, and then flap (8) closing velocity is slack-off, thereby realizes closing slowly Slow Close.
The utility model and existing common swing check valve ratio, water resistance was little when this valve was opened, and saved the energy, reached the adjustable purpose of valve closing speed by metering pin valve (27), thereby prevented water attack protection water pump and pipeline.
Claims (3)
1, a kind of by flap [8], rocking bar [9], be fixed on the controlled buffer valve of rotary-open type water resistance of axle [10] the composition valve body [1] on the valve shell, it is characterized in that this valve is by hydraulic cylinder [2], Slow Close modulating valve [3] and pilot line [4], [5], [6], [7], there is a upper surface to be connected in its hydraulic cylinder, the piston [12] that lower surface is connected with connecting rod [11] with piston rod [13] together with composition.
2, according to the controlled buffer valve of the said rotary-open type water resistance of claim 1, it is characterized in that the upward position in hole (16) of said hydraulic cylinder cylinder barrel (15), be 1/3rd to 1/4th places of cylinder barrel length from the cylinder bottom distance.
3, according to the said Slow Close modulating valve of right 1-2, the regulation range that it is characterized in that the circulation area in gap between the valve body (28) of said Slow Close modulating valve and the Throttle needle valve (27) is 0 to 500mm
2, the best effort regulation range is 0 to 50mm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85202944 CN85202944U (en) | 1985-07-18 | 1985-07-18 | Controllable rotating water resistance slow closing non-return valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85202944 CN85202944U (en) | 1985-07-18 | 1985-07-18 | Controllable rotating water resistance slow closing non-return valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85202944U true CN85202944U (en) | 1986-05-14 |
Family
ID=4798633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85202944 Withdrawn CN85202944U (en) | 1985-07-18 | 1985-07-18 | Controllable rotating water resistance slow closing non-return valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85202944U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251203B (en) * | 2008-04-09 | 2010-06-09 | 胡金木 | Check valve |
| CN105179329A (en) * | 2015-08-07 | 2015-12-23 | 柳超 | Efficient hydraulic ram |
| CN111536277A (en) * | 2020-06-17 | 2020-08-14 | 中国建筑设计研究院有限公司 | Drainage non-return system and drainage non-return method |
-
1985
- 1985-07-18 CN CN 85202944 patent/CN85202944U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251203B (en) * | 2008-04-09 | 2010-06-09 | 胡金木 | Check valve |
| CN105179329A (en) * | 2015-08-07 | 2015-12-23 | 柳超 | Efficient hydraulic ram |
| CN111536277A (en) * | 2020-06-17 | 2020-08-14 | 中国建筑设计研究院有限公司 | Drainage non-return system and drainage non-return method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| 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 |