CN2480647Y - Slow cutting off check valve by piston damping - Google Patents
Slow cutting off check valve by piston damping Download PDFInfo
- Publication number
- CN2480647Y CN2480647Y CN 01224932 CN01224932U CN2480647Y CN 2480647 Y CN2480647 Y CN 2480647Y CN 01224932 CN01224932 CN 01224932 CN 01224932 U CN01224932 U CN 01224932U CN 2480647 Y CN2480647 Y CN 2480647Y
- Authority
- CN
- China
- Prior art keywords
- flap
- piston
- valve
- guide cylinder
- valve gap
- 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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- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
The utility model provides a clack valve which uses a damping action of a piston to realize a slow closure, such as a lifting-typed clack valve in which the upper portion of a valve body is equipped with a bonnet, the inner side of the valve body is equipped with a flap, the upper portion of the flap is equipped with a guide bar, the lower portion of the bonnet is disposed with a guiding cylinder, the lateral side of the guiding cylinder of the bonnet is equipped with a window, the top of the guide bar of the flap is equipped with a piston which is cooperated with the guide cylinder of the bonnet, the bottom of the guide cylinder of the bonnet is equipped with a bottom cover which is cooperated with the guide bar of the flap, and the piston and the guide bar of the flap can fall down by overcoming the liquid damping in the guide cylinder and the bottom cover. Thereby the utility model reduces the closing velocity of the clack valve, realizes function of the automatic slow closure, prevents the water-hammer phenomenon when the clack is closing, and prevents the relevant equipments from damaging.
Description
The utility model relates to a kind of safety check; comprise Lift check valve, screw down nonreturn valve and pipe line check valve; specifically a kind of safety check that utilizes the piston damping function to realize Slow Close, the distinctive Slow Close function of this valve can prevent the generation of water hammer, the safety of protection equipment.
General check valve (claiming check valve, non-return flap again) is used for preventing the occasion of liquid reverse flow, opens during the medium following current, closes during adverse current.The flap top of Lift check valve is processed with guide rod, bonnet lower is processed with guide cylinder, the flap guide rod can be in the valve gap guide cylinder free lifting.Be processed with relief hole on valve gap guide cylinder top, when the flap lifting, the medium in the guide cylinder can be freed in and out by relief hole, and flap is not produced damping function, does not therefore have the Slow Close function.During medium reverse flow in process pipe, flap is subjected to medium active force and self gravitation effect and descends, and makes valve closing.Its closing motion be rapidly, unexpected.Flowing liquid is obstructed suddenly and static in the pipeline, can produce great pressure in moment to rise to, thereby the pump, valve, pipeline and the equipment that are associated are damaged.Here it is water hammer or water hammer.
The purpose of this utility model is to provide a kind of water hammer or water hammer of preventing, utilizes the piston damping function to realize the safety check of Slow Close
The purpose of this utility model is achieved in that the safety check that utilizes the piston damping function to realize Slow Close, the upper end of valve body is provided with valve gap, be provided with flap in the valve body, flap top is provided with guide rod, bonnet lower is provided with guide cylinder, valve gap guide cylinder side is provided with window, the top of flap guide rod is provided with the piston that matches with the valve gap guide cylinder, the valve gap bottom is provided with the bottom that matches with the flap guide rod, and piston and flap guide rod can be according to the damping size and with the friction speed liftings in valve gap guide cylinder and bottom; Can be provided with maze trough on the cylndrical surface of piston; Bottom is provided with little outage.
Effect of the present utility model is as follows: a piston is installed at the top of flap guide rod, between the guide cylinder of it and valve gap for movingly.In the closure of check ring starting stage, flap is because deadweight and medium active force and land downwards, and the medium in the valve gap guide cylinder can freely be discharged by the window of valve gap guide cylinder side.Flap motion is not subjected to damping function, and when the window lower edge of piston arrives guide cylinder side, medium can not freely be discharged from window in the chamber in, is trapped in the damping phenomena that end cap bottom the valve gap and the liquid medium between the piston have produced similar hydraulic cylinder piston.This partially liq can only be by between piston and the valve gap guide cylinder, flow out in the bottom of valve gap bottom and the slit between the flap guide rod, makes flap fall to being obstructed and reduced closing velocity widely, thereby realized automatic Slow Close function.This Slow Close speed is to be calculated and to be controlled by the bottom bottom flap weight, pressure medium, piston and valve gap guide cylinder and the valve gap and the size of the matching gap between the flap guide rod.On the piston cylndrical surface, process maze trough, can prolong the shut-in time.Except strengthening the gap between the guiding element, can also on the bottom of valve gap bottom, open little outage, to accelerate the intracavity liquid velocity of discharge, shorten the shut-in time.Safety check comprises Lift check valve, screw down nonreturn valve and pipe line check valve etc.
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Among the figure:
1. valve body 2. flaps 3. flap guide rods 4. bottoms 5. valve gap guide cylinders
6. piston 7. windows 8. valve gaps
In the embodiment shown in fig. 1, the upper end of valve body 1 is provided with valve gap 8, the bottom of its valve gap 8 is provided with valve gap guide cylinder 5, the side of valve gap guide cylinder 5 has window 7, be provided with flap 2 in the valve body 1, the top of flap 2 is provided with flap guide rod 3, the top of flap guide rod 3 is provided with the piston 6 that matches with valve gap guide cylinder 5, valve gap guide cylinder 5 bottoms are provided with the bottom 4 that matches with flap guide rod 3, piston 7 and flap guide rod 3 can with the friction speed lifting, be realized the Slow Close function according to the damping size in valve gap guide cylinder 5 and bottom 4; Can be provided with maze trough on the cylndrical surface of piston 6; On the bottom 4 of valve gap bottom, can also be provided with little outage.
Claims (3)
1. utilize the piston damping function to realize the safety check of Slow Close, upper end at valve body is provided with valve gap, be provided with flap in the valve body, flap top is provided with guide rod, bonnet lower is provided with guide cylinder, it is characterized in that valve gap guide cylinder side is provided with window, and the top of flap guide rod is provided with the piston that matches with the valve gap guide cylinder, valve gap guide cylinder bottom is provided with the bottom that matches with the flap guide rod, and piston and flap guide rod can be subjected to damping function and lifting in valve gap guide cylinder and bottom.
2. safety check as claimed in claim 1 is characterized in that can being provided with maze trough on the cylndrical surface of piston.
3. safety check as claimed in claim 1 is characterized in that bottom is provided with little outage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01224932 CN2480647Y (en) | 2001-06-01 | 2001-06-01 | Slow cutting off check valve by piston damping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01224932 CN2480647Y (en) | 2001-06-01 | 2001-06-01 | Slow cutting off check valve by piston damping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2480647Y true CN2480647Y (en) | 2002-03-06 |
Family
ID=33641122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01224932 Expired - Fee Related CN2480647Y (en) | 2001-06-01 | 2001-06-01 | Slow cutting off check valve by piston damping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2480647Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375096A (en) * | 2019-08-27 | 2019-10-25 | 江苏江恒阀业有限公司 | A kind of differential Slow Close Valve of angie type |
-
2001
- 2001-06-01 CN CN 01224932 patent/CN2480647Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110375096A (en) * | 2019-08-27 | 2019-10-25 | 江苏江恒阀业有限公司 | A kind of differential Slow Close Valve of angie type |
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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 |