CN201610962U - Slow closing swing check valve having bypass - Google Patents
Slow closing swing check valve having bypass Download PDFInfo
- Publication number
- CN201610962U CN201610962U CN2010201440970U CN201020144097U CN201610962U CN 201610962 U CN201610962 U CN 201610962U CN 2010201440970 U CN2010201440970 U CN 2010201440970U CN 201020144097 U CN201020144097 U CN 201020144097U CN 201610962 U CN201610962 U CN 201610962U
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- CN
- China
- Prior art keywords
- check valve
- swing check
- valve
- swing
- bypass
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- Expired - Fee Related
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Abstract
A slow closing swing check valve having a bypass comprises a first swing check valve and a second swing check valve which are connected in parallel, wherein, the first swing check valve has a first valve body, inlets and outlets having axial lines in the same one horizontal line are provided at two ends of the first valve body, a bypass pipe is connected between a first inlet and a first outlet at the side of the first valve body, a second swing check valve in the same direction of the first swing check valve is provided on the bypass pipe, a second rotary type damping device is connected onto a valve shaft of the second swing check valve, the drift diameter of the second swing check valve is one fourth to one fifth of the drift diameter of the first swing check valve. the utility model has swing check valves which are connected in parallel, the valve shaft of one swing check valve is connected with the rotary type damping device, when the fluid flows in reverse direction, the fluid flowing in the reverse direction drives the first swing check valve to rapidly close, the second swing check valve with the smaller drift diameter is slowly closed, thereby avoiding the generation of the water hammer phenomenon in the pipe.
Description
Technical field
The utility model relates to the by-pass valve of a kind of Swing check valve, particularly a kind of Swing check valve.
Background technique
Safety check is called check valve or one-way valve again, and safety check is the power that fluid flow to produce in the tube road and the valve that opens and closes automatically, and safety check has direction.Safety check has Swing check valve.In the prior art, Swing check valve has valve body, two ends of valve body has import and the outlet of axis on same horizontal line, the upside of valve body has the valve gap of level, towards outlet one side valve seat is arranged in the valve body, valve shaft above valve seat is arranged, in the valve body, be hinged with the flap that matches with valve seat on the valve shaft on the valve body.During use, Swing check valve is installed on the horizontal pipeline, during the fluid forward flow, fluid flows into from import, in Swing check valve, positive flow of fluid produces tries hard to recommend the gravity that moving flap overcomes self and upwards is rotated away from valve seat around valve shaft, Swing check valve is opened, when reverse fluid flow, fluid flows into from outlet, in Swing check valve, power that flap produces because of reverse fluid flow and the gravity of self rotate fast around valve shaft to be fallen on the valve seat, makes the Swing check valve quick closedown.When the Swing check valve quick closedown, flow rate of fluid reduces to zero rapidly from the refluence speed of maximum in the pipeline, the kinetic energy of fluid changes into static energy rapidly, makes that the static pressure of fluid raises rapidly in the pipeline, and generation may produce the water hammer of bigger destruction to pipe-line system.
For the less Swing check valve of latus rectum, it is not very big that the water hammer that produces in the pipeline produces destruction to pipeline, but for the bigger Swing check valve of latus rectum, the water hammer of generation might produce bigger destruction to pipe-line system.
When closing, produce water hammer in order to eliminate the bigger Swing check valve of latus rectum, on the valve shaft of the bigger Swing check valve of latus rectum, be connected with rotary damping device, rotary damping device is connected with the counterweight of flap, when the fluid forward flow, fluid flows into from the import of valve body, positive flow of fluid produces tries hard to recommend the gravity that moving flap overcomes self and upwards is rotated away from valve seat around valve shaft, Swing check valve is opened, lift off a seat when valve shaft upwards rotates at flap, the swing of driven rotary formula damping device counterweight, flap is when all opening, and counterweight is parked in the position with the flap balance, helps keeping the opening state of flap; When reverse fluid flow, fluid flows into from the outlet of valve body, power that flap produces because of reverse fluid flow and the gravity of self rotate around valve shaft to be fallen on the valve seat, flap is rotating when falling on the valve seat, be subjected to the damping of rotary damping device, fall that lentamente the Swing check valve pass is slowly closed, eliminated the water hammer that the bigger Swing check valve of latus rectum produces when closing, drive the counterweight swing simultaneously and reset.
Though the Swing check valve that latus rectum is bigger has rotary damping device, but owing to the flap quality of the bigger Swing check valve of latus rectum is bigger, when reverse fluid flow, flap is under the effect of mobile Driving force that produces of fluid and self gravitation, also can fall on the valve seat to lower slider fast, produce the water hammer that pipe-line system is had destruction.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned deficiency, to propose a kind of Slow Close Swing check valve with bypass that can avoid producing water hammer.
The utility model is realized with the following method.
Slow Close Swing check valve with bypass has first Swing check valve and second Swing check valve that is in parallel, first Swing check valve has first valve body, first two ends of valve body has import and the outlet of axis on same horizontal line, between first inlet of the first valve body side and first outlet port, be connected with bypass duct, have on the bypass duct and equidirectional second Swing check valve of first Swing check valve, be connected with the second rotary damping device on the valve shaft of second Swing check valve, the latus rectum of second Swing check valve is 1/4th to 1/5th of the first Swing check valve latus rectum.
During use, the utility model is installed on the horizontal pipeline, during the fluid forward flow, fluid flows into from the import of first Swing check valve, in first Swing check valve, positive flow of fluid produces tries hard to recommend the gravity that moving its flap overcomes self and upwards is rotated away from valve seat around first valve shaft, first Swing check valve is opened, simultaneously, the forward fluid flows in second Swing check valve, the gravity that the flap of trying hard to recommend moving second Swing check valve that positive flow of fluid produces overcomes self upwards is rotated away from valve seat around its valve shaft, second Swing check valve is opened, turn to when opening around its valve shaft at the flap of second Swing check valve, the counterweight that drives the second rotary damping device on second valve shaft simultaneously swings to the position with the flap balance; When reverse fluid flow, fluid flows into from the outlet of first Swing check valve, in first Swing check valve, power that the flap of first Swing check valve produces because of reverse fluid flow and the gravity of self rotate around first valve shaft to be fallen on its valve seat, make the first Swing check valve quick closedown, simultaneously, counter fluid enters in second Swing check valve, power that the flap of second Swing check valve produces because of reverse fluid flow and the gravity of self rotate around its valve shaft to be fallen on its valve seat, the flap of second Swing check valve is rotating when falling on the valve seat, be subjected to the damping function of the second rotary damping device on its valve shaft, fall that lentamente second Swing check valve is slowly closed.
The utility model has first Swing check valve and second Swing check valve that is in parallel, the latus rectum of second Swing check valve is 1/4th to 1/5th of the first Swing check valve latus rectum, be connected with rotary damping device on the valve shaft of second Swing check valve, when reverse fluid flow, the fluid drives first Swing check valve quick closedown of reverse flow, the second less Swing check valve of latus rectum is slowly closed, and can avoid producing in the pipeline water hammer.
Below in conjunction with accompanying drawing, the utility model is further described.
Description of drawings
Fig. 1 looks schematic representation according to a kind of master with Swing check valve of second that invention scheme of the present utility model proposes;
Fig. 2 is that schematic representation cuts open in the side-looking office of Fig. 1.
Embodiment
Fig. 1, among Fig. 2, Slow Close Swing check valve with bypass has first Swing check valve 1 and second Swing check valve 2 that is in parallel, first Swing check valve has first valve body 3, first two ends of valve body has the import of axis on same horizontal line and outlet 4,5, between first inlet of the first valve body side and first outlet port, be connected with bypass duct 6, have on the bypass duct and equidirectional second Swing check valve 2 of first Swing check valve, the latus rectum that is connected with second rotary damping device 8, the second Swing check valves on the valve shaft 7 of second Swing check valve is 1/4th to 1/5th of the first Swing check valve latus rectum.
When in the bigger pipeline of latus rectum, using,, have in the Slow Close Swing check valve of bypass, can be connected with rotary damping device on the valve shaft of first Swing check valve in order to eliminate the water water hammer better.
Among Fig. 1, Fig. 2, have in the Slow Close Swing check valve of bypass, be connected with the first rotary damping device 10 on the valve shaft 9 of first Swing check valve.
Claims (2)
1. Slow Close Swing check valve with bypass, it is characterized in that: first Swing check valve and second Swing check valve that are in parallel are arranged, first Swing check valve has first valve body, first two ends of valve body has import and the outlet of axis on same horizontal line, between first inlet of the first valve body side and first outlet port, be connected with bypass duct, have on the bypass duct and equidirectional second Swing check valve of first Swing check valve, be connected with the second rotary damping device on the valve shaft of second Swing check valve, the latus rectum of second Swing check valve is 1/4th to 1/5th of the first Swing check valve latus rectum.
2. by the described Slow Close Swing check valve of claim 1, it is characterized in that: be connected with the first rotary damping device on the valve shaft of described first Swing check valve with bypass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201440970U CN201610962U (en) | 2010-03-30 | 2010-03-30 | Slow closing swing check valve having bypass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201440970U CN201610962U (en) | 2010-03-30 | 2010-03-30 | Slow closing swing check valve having bypass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201610962U true CN201610962U (en) | 2010-10-20 |
Family
ID=42961596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201440970U Expired - Fee Related CN201610962U (en) | 2010-03-30 | 2010-03-30 | Slow closing swing check valve having bypass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201610962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976391A (en) * | 2014-04-12 | 2015-10-14 | 徐营 | Check valve |
-
2010
- 2010-03-30 CN CN2010201440970U patent/CN201610962U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976391A (en) * | 2014-04-12 | 2015-10-14 | 徐营 | Check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101020 Termination date: 20160330 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |