CN202252162U - Slowly-closing rubber flap check valve - Google Patents
Slowly-closing rubber flap check valve Download PDFInfo
- Publication number
- CN202252162U CN202252162U CN2011203378714U CN201120337871U CN202252162U CN 202252162 U CN202252162 U CN 202252162U CN 2011203378714 U CN2011203378714 U CN 2011203378714U CN 201120337871 U CN201120337871 U CN 201120337871U CN 202252162 U CN202252162 U CN 202252162U
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- valve
- flap
- piston cylinder
- valve body
- cylinder
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- Expired - Lifetime
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Abstract
The utility model discloses a slowly-closing rubber flap check valve. The check valve comprises a valve body 3 and a valve flap 2 positioned in the valve body 3, and further comprises a slow closing device. The slow closing device comprises an ejector rod 8 and a piston cylinder 4. The ejector rod 8 is positioned below the valve flap 2, and is fixedly connected with a piston of the piston cylinder 4. One end of a cylinder body of the piston cylinder 4 is close to the valve flap, and is communicated with the water outlet end of the valve body 3 through a bypass pipe 5. The bottom end of the cylinder body of the piston cylinder 4 is communicated with the water inlet end of the valve body 3 through a bypass pipe 5 which is connected in series with a needle valve 6. By the check valve, the damage of a water hammer produced by the backflow of a medium to a water pump is prevented by quick closing in a previous stage; and in a post stage, the needle valve is adjusted to prolong the closing time of the valve flap, eliminate the production of the huge water hammer and protect the whole pipeline system.
Description
Technical field
The utility model relates to safety check, especially Slow Close lobe safety check.
Background technique
Safety check is a kind of valve commonly used in the industrial and agricultural production, and the refluence that it is mainly used in anti-sealing in the pipeline damages pump and other equipment.At present, the flap of rubber lobe safety check commonly used is not more than 45 ° angle through rotation and reaches fast opening and closing, destroys to prevent the water pump before water hammer is to valve in the pipeline.Valve seat becomes 45 ° of angles with circulation duct; Flap forms good sealing with rubber-coated resiliently deformable and the valve seat through rubber of spool; Though above-mentioned rubber lobe safety check can well prevent the destruction of water hammer to water pump; But pipeline produces huge water hammer behind the valve, thereby whole tubing is caused very big destruction.
The model utility content
The purpose of the utility model is exactly to solve water hammer that safety check produces in the non-return process problem to water pump and pipeline destroyed.
The technological scheme that the utility model adopts is: a kind of Slow Close rubber lobe safety check; It comprises valve body and the flap that is positioned at valve body; It also comprises slow closing device its characteristic, and described slow closing device comprises push rod and piston cylinder, and described push rod is positioned at the flap below; The piston of push rod and piston cylinder is connected, and the nearly flap end of the cylinder body of described piston cylinder is provided with bypass tube with the waterexit end of valve body and is communicated with; The bottom of cylinder body also is provided with bypass tube with the feed-water end of valve body and is connected, and is serially connected with needle-valve on this bypass tube.
Adopt technique scheme, during starting mode of pump, the flow of fluid medium inlet valve body; Flap is opened, and medium moves upward through the bypass tube entering piston cylinder promotion push rod of band needle-valve simultaneously, and flowing medium produces and refluxes when water pump quits work; Flap falls after rise, and push rod moves downward under the effect of flap and hydraulic pressure, and the water in the piston cylinder flap end far away is discharged through needle-valve; Above-mentioned is the Slow Close stage, and the slow valve time is regulated through needle-valve, thereby realizes the purpose of Slow Close.
Be to accelerate the flap closing velocity, it is characterized in that establishing bypass tube with the water intake of valve body near the said piston cylinder cylinder body middle part is communicated with, and is serially connected with check valve on the by-pass line.
Push rod is beginning to fall back in this segment distance of band check valve bypass tube; Water in the piston cylinder flap end far away is discharged through needle-valve and check valve simultaneously, and this stage is the quick closedown stage, in case push rod is crossed the bypass tube of band check valve; Remaining water can only be discharged through needle-valve, gets into the Slow Close stage again.
The utility model beneficial effect is: the utility model has stoped the damage of the water hammer of medium refluence generation to water pump through the quick closedown of last stage; After-stage is through the adjusting of needle-valve; Prolong the time that flap is closed, eliminated the generation of huge water hammer, protected whole tubing.
Description of drawings
Fig. 1 is the utility model schematic representation.
Embodiment
A kind of Slow Close rubber of the utility model lobe safety check; As shown in Figure 1, it comprises valve body 3 and the flap 2 and the slow closing device that are positioned at valve body 3, and valve body 3 tops are provided with 3 encapsulation of 1 pair of valve body of valve gap; Flap 2 top movable are connected on the valve body 3, the outer wrap rubber of flap 2.
Slow closing device is shown in the bottom of Fig. 1, and it comprises push rod 8 and piston cylinder 4, and push rod 8 is positioned at flap 2 belows, and push rod 8 is connected with the piston of piston cylinder 4, and the nearly flap end of the cylinder body of piston cylinder 4 is provided with bypass tube 5 with the waterexit end of valve body 3 and is communicated with; The bottom of piston cylinder 4 cylinder bodies also is provided with bypass tube 5 with the feed-water end of valve body 3 and is connected, and is serially connected with needle-valve 6 on this bypass tube.Establish bypass tube with the water intake of valve body 3 near the piston cylinder 4 cylinder bodies middle part and be communicated with, be serially connected with check valve 7 on the by-pass line.
Claims (2)
1. Slow Close rubber lobe safety check; It comprises valve body (3) and is positioned at the flap (2) of valve body (3); It also comprises slow closing device its characteristic, and described slow closing device comprises push rod (8) and piston cylinder (4), and described push rod (8) is positioned at flap (2) below; Push rod (8) is connected with the piston of piston cylinder (4), and the nearly flap end of the cylinder body of described piston cylinder (4) is provided with bypass tube (5) with the waterexit end of valve body (3) and is communicated with; The bottom of piston cylinder (4) cylinder body also is provided with bypass tube (5) with the feed-water end of valve body (3) and is connected, and is serially connected with needle-valve (6) on this bypass tube.
2. Slow Close rubber lobe safety check according to claim 1 is characterized in that establishing bypass tube with the water intake of valve body (3) near said piston cylinder (4) the cylinder body middle part is communicated with, and is serially connected with check valve (7) on the by-pass line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203378714U CN202252162U (en) | 2011-09-09 | 2011-09-09 | Slowly-closing rubber flap check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203378714U CN202252162U (en) | 2011-09-09 | 2011-09-09 | Slowly-closing rubber flap check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202252162U true CN202252162U (en) | 2012-05-30 |
Family
ID=46113405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203378714U Expired - Lifetime CN202252162U (en) | 2011-09-09 | 2011-09-09 | Slowly-closing rubber flap check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202252162U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812692A (en) * | 2015-02-09 | 2017-06-09 | 张朝利 | A kind of construction method of water pump flap automatic cover-turning device |
| CN108916426A (en) * | 2018-08-27 | 2018-11-30 | 成都飞机工业（集团）有限责任公司 | It is a kind of can buffer fluid impact check valve |
-
2011
- 2011-09-09 CN CN2011203378714U patent/CN202252162U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812692A (en) * | 2015-02-09 | 2017-06-09 | 张朝利 | A kind of construction method of water pump flap automatic cover-turning device |
| CN108916426A (en) * | 2018-08-27 | 2018-11-30 | 成都飞机工业（集团）有限责任公司 | It is a kind of can buffer fluid impact check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |