CN2793466Y - Liquid-resistant valve - Google Patents
Liquid-resistant valve Download PDFInfo
- Publication number
- CN2793466Y CN2793466Y CN 200520070910 CN200520070910U CN2793466Y CN 2793466 Y CN2793466 Y CN 2793466Y CN 200520070910 CN200520070910 CN 200520070910 CN 200520070910 U CN200520070910 U CN 200520070910U CN 2793466 Y CN2793466 Y CN 2793466Y
- Authority
- CN
- China
- Prior art keywords
- seal plate
- upper flange
- cylindrical shell
- static seal
- connecting rod
- 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)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The utility model relates to a liquid-resistant valve, particularly biochemical equipment, which is more specially used for preventing liquid in a pump cavity of a water-ring vacuum pump from back flow into a system in a vacuum pump system and preventing accidents from occurring. According to a design proposal provided by the utility model, the inner part of a cylinder body is provided with a floating ball and the upper and the lower ends of the cylinder body are respectively provided with an upper flange and a lower flange. The utility model is characterized in that the combination part of the cylinder body and the upper flange is provided with a static seal plate, the center of the static seal plate is provided with a through hole, the inner part of the hole is provided with a connecting rod and the upper end of the connecting rod is connected with a spacing mechanism. The lower end of the connecting rod is connected with a dynamic seal plate, and the outer margin of the upper surface of the dynamic seal plate is provided with a seal surface which can contact a seal surface arranged at the lower surface of the static seal plate. The device can be used for improving the seal performance and the work precision of the liquid-resistant valve.
Description
Technical field
The utility model relates to biochemical equipment, and specifically a kind of vacuum pump system that is used for prevents that the liquid in the Nash hytor pump chamber from backflowing to internal system, the device of avoiding accident to produce.
Background technique
The blocking solution valve is mainly used in the vacuum pump system, prevents that the liquid in the Nash hytor pump chamber from backflowing to internal system.In the prior art, the ball float in the blocking solution valve when work, directly be positioned at cylindrical shell on flange mouth contact, therefore, be easy to cause leakage phenomenon.
Summary of the invention
The purpose of this utility model is to design a kind of blocking solution valve, to improve the sealability and the operating accuracy of blocking solution valve.
According to design proposal provided by the utility model, ball float is arranged in cylindrical shell, two ends up and down at cylindrical shell have upper flange and lower flange respectively, it is characterized in that: in the connecting part of cylindrical shell and upper flange the static seal plate is set, through hole is arranged, connecting rod is arranged in the hole in the central authorities of static seal plate, upper end at connecting rod connects position-limit mechanism, the lower end of connecting rod connects the motive sealing plate, and the top outer rim of motive sealing plate has sealing surface, and the sealing face can contact with the sealing surface below being arranged at the static seal plate.
On lower flange, connect the position-limited lever that is used to support ball float.Outer rim at the motive sealing plate is provided with seal ring, on sealing surface formation and the seal ring.In the connecting part of cylindrical shell and static seal plate or the connecting part of cylindrical shell and upper flange the liner that seals is set.
Connecting part at static seal plate and upper flange is provided with seal ring.Position-limit mechanism is a limiting board, and is positioned at upper flange, and the outer rim of limiting board contacts with the inwall of upper flange.
The utility model has the advantages that: owing to be provided with the static seal plate in the connecting part of cylindrical shell and upper flange, the motive sealing plate that is installed on the connecting rod is arranged in cylindrical shell, after closing vacuum pump, under the effect of pressure reduction, ball float rises with the motive sealing plate, sealing surface on the motive sealing plate is contacted with sealing surface on the static seal plate, thereby, played good seal action.
Description of drawings
Fig. 1 is a structural drawing of the present utility model.
Embodiment
As shown in the figure: ball float 13 is arranged in cylindrical shell 12, upper flange 1 and lower flange 19 are arranged respectively at the two ends up and down of cylindrical shell 12, connecting part at cylindrical shell 12 and upper flange 1 is provided with static seal plate 6, there is through hole in central authorities at static seal plate 6, so that liquid flows in the cylindrical shell 12 by this through hole, connecting rod 2 is arranged in the through hole, this connecting rod 2 is much smaller than through hole, in order to avoid influence flowing of liquid, upper end at connecting rod 2 connects position-limit mechanism 9, this position-limit mechanism 9 play the guiding role simultaneously, make motive sealing plate 11 when action, have good reliability and accuracy, the lower end of connecting rod 2 connects motive sealing plate 11, and the top outer rim of motive sealing plate 11 has sealing surface, and the sealing face can contact with the sealing surface below being arranged at static seal plate 6.
On lower flange 19, connect the position-limited lever 14 be used to support ball float 13, in order to avoid ball float 13 when moving down, stops up the mouth of lower flange 19.Outer rim at motive sealing plate 11 is provided with seal ring 10, on sealing surface formation and the seal ring 10.In cylindrical shell 12 and the connecting part of static seal plate 6 or the connecting part of cylindrical shell 12 and upper flange 1 paper liner 7 that seals is set.Connecting part at static seal plate 6 and upper flange 1 is provided with seal ring 8.Position-limit mechanism 9 can adopt limiting board, and this limiting board is positioned at upper flange 1, and the outer rim of limiting board contacts with the inwall of upper flange 1.
During use, the blocking solution valve vertically is installed on the intakeport of Nash hytor, upper flange 1 is connected with vacuum system, when Nash hytor requires work in accordance with regulations, because gas flows from top to bottom in the pipeline, enter after the upper flange 1, enter in the lower flange 19 through cylindrical shell 12 inner chambers, by behind the intakeport of Nash hytor, finish the exhaust process of system again.
After shutting down suddenly or shut down, Nash hytor forgets the inlet valve that closes Nash hytor; at this moment because there is negative pressure in internal system; and Nash hytor communicates with atmosphere because of relief opening; the liquid meeting reverse flow that causes Nash hytor inside is to system; when liquid flows to cylindrical shell 12 inside of blocking solution valve; water touches the ball float 13 that utilizes seamless steel ball to make; because buoyancy function; ball float 13 is moved upward; promoting motive sealing plate 11 moves up; seal ring 10 on the motive sealing plate 11 is contacted with sealing surface on the static seal plate 6; seal ring 10 is out of shape because of stressed; form static seal at static seal plate 6 and 11 of motive sealing plates, make the liquid in the cylindrical shell 12 can't flow to internal system, stop the Nash hytor internal liquid to flow to internal system.
Claims (6)
1, a kind of blocking solution valve, ball float (13) is arranged in cylindrical shell (12), upper flange (1) and lower flange (19) are arranged respectively at the two ends up and down of cylindrical shell (12), it is characterized in that: the connecting part at cylindrical shell (12) and upper flange (1) is provided with static seal plate (6), there is through hole in central authorities at static seal plate (6), connecting rod (2) is arranged in the hole, upper end at connecting rod (2) connects position-limit mechanism (9), the lower end of connecting rod (2) connects motive sealing plate (11), the top outer rim of motive sealing plate (11) has sealing surface, and the sealing face can contact with the sealing surface below being arranged at static seal plate (6).
2, blocking solution valve according to claim 1 is characterized in that: go up the position-limited lever (14) that connection is used to support ball float (13) at lower flange (19).
3, blocking solution valve according to claim 1 is characterized in that: the outer rim at motive sealing plate (11) is provided with seal ring (10), on sealing surface formation and the seal ring (10).
4, blocking solution valve according to claim 1 is characterized in that: in cylindrical shell (12) and the connecting part of static seal plate (6) or the connecting part of cylindrical shell (12) and upper flange (1) liner (7) that seals is set.
5, blocking solution valve according to claim 1 is characterized in that: the connecting part at static seal plate (6) and upper flange (1) is provided with seal ring (8).
6, blocking solution valve according to claim 1 is characterized in that: position-limit mechanism (9) is a limiting board, and is positioned at upper flange (9), and the outer rim of limiting board contacts with the inwall of upper flange (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520070910 CN2793466Y (en) | 2005-04-18 | 2005-04-18 | Liquid-resistant valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520070910 CN2793466Y (en) | 2005-04-18 | 2005-04-18 | Liquid-resistant valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2793466Y true CN2793466Y (en) | 2006-07-05 |
Family
ID=36820611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520070910 Expired - Fee Related CN2793466Y (en) | 2005-04-18 | 2005-04-18 | Liquid-resistant valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2793466Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629397A (en) * | 2013-11-05 | 2014-03-12 | 马兆良 | Automatic pressure leakage block valve |
| CN108317293A (en) * | 2018-01-19 | 2018-07-24 | 浙江大学 | A kind of adjustable water hammer protective device of hydraulic pipeline |
| CN109827000A (en) * | 2019-03-18 | 2019-05-31 | 宁波瑞风斯泰机电科技有限公司 | A kind of fluid system cleaning minute-pressure occluding device |
-
2005
- 2005-04-18 CN CN 200520070910 patent/CN2793466Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629397A (en) * | 2013-11-05 | 2014-03-12 | 马兆良 | Automatic pressure leakage block valve |
| CN108317293A (en) * | 2018-01-19 | 2018-07-24 | 浙江大学 | A kind of adjustable water hammer protective device of hydraulic pipeline |
| CN109827000A (en) * | 2019-03-18 | 2019-05-31 | 宁波瑞风斯泰机电科技有限公司 | A kind of fluid system cleaning minute-pressure occluding device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuxi Sifang Barrel Making Co., Ltd. Assignor: Wuxi City Sifang Vacuum Equipment Co., Ltd. Contract record no.: 2010320000475 Denomination of utility model: Liquid-resistant valve Granted publication date: 20060705 License type: Exclusive License Record date: 20100427 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060705 Termination date: 20130418 |