CN204985791U - Voussoir formula dual -gate valve - Google Patents
Voussoir formula dual -gate valve Download PDFInfo
- Publication number
- CN204985791U CN204985791U CN201520184747.7U CN201520184747U CN204985791U CN 204985791 U CN204985791 U CN 204985791U CN 201520184747 U CN201520184747 U CN 201520184747U CN 204985791 U CN204985791 U CN 204985791U
- Authority
- CN
- China
- Prior art keywords
- valve rod
- voussoir
- valve
- flashboard
- wedge block
- 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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Abstract
The utility model discloses a voussoir formula dual -gate valve, including left flashboard, right flashboard, valve rod, go up the voussoir, lower voussoir and spring. Wherein, the valve rod inserts between left flashboard and the right flashboard, and lower voussoir is fixed in the lower extreme of valve rod, goes up the other end that the voussoir lies in the valve rod to can follow the valve rod up -and -down motion. When the valve was closed, drive arrangement drove the valve rod downstream, and when the location boss of valve body bottom was touch to the voussoir instantly, the last voussoir of valve rod driven continued down, and valve seat seal power about down in -process valve rod axial force turns into reaches and reliably seals. During valve open, drive arrangement drives the valve rod upward movement, and the valve rod drive is gone up the voussoir and is made its and hyposphene block splitting, and when valve rod head and upper seal seated connection touched, the flashboard subassembly broke away from passageway completion opening action. The utility model discloses small friction, the driving moment is little, and the leakproofness is good, and is stand wear and tear, and the stable performance is applicable to large -scale thermoelectricity and nuclear power generating sets.
Description
Technical field
The utility model relates to a kind of valve mechanism, specifically a kind of wedge block type double-flashboard gate valve.
Background technique
Along with the development of China's power industry and machinery industry, a lot of valve has realized production domesticization, but still has part valve to need from external import, wherein just comprises double-flashboard gate valve.Voussoir gate valve, owing to external force can be helped to make the effective wedging of closure member and have stronger sealability by nationality, has a very wide range of applications in all kinds of process system and pipeline.The adjustment to the angle of wedge that wedge block type double-flashboard gate valve has by double-flashboard structure and adaptive ability, can avoid the shortcoming of wedge block type single-shutter gate valve.So development wedge block type double-flashboard gate valve can reduce the construction cost in power station, the technical capability of domestic power station valve can be improved again.
Model utility content
The purpose of this utility model is to provide a kind of wedge block type double-flashboard gate valve, good airproof performance, stable performance, is applicable to large electric power plant and nuclear power generating sets.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of wedge block type double-flashboard gate valve, comprises left flashboard, right flashboard, valve rod, upper voussoir, lower wedge block and spring; Described valve rod inserts between left flashboard and right flashboard, and described lower wedge block is fixed on the lower end of valve rod, and described upper voussoir is positioned at the other end of valve rod, and can move up and down along valve rod; One end of described spring is fixed on the upper-end surface of lower wedge block, and the other end freely upward.
Aforesaid spring is helical spring.
The upper-end surface of aforesaid lower wedge block is inclined-plane.
The lower end surface of aforesaid upper voussoir is arc surface.
The angle range of the upper-end surface of aforesaid lower wedge block is 30 °-75 °.
The upper-end surface of aforesaid lower wedge block and the lower end surface pile-up welding hard alloy of described upper voussoir.
The utility model has the following advantages: in opening-closing process, because upper lower wedge block is arc surface and inclined-plane linear contact lay, frictional force is little, upper and lower voussoir is made to produce relative horizontal displacement by initial tension of spring, realize flashboard to be separated with valve seat two sealing surface, reduce the friction between sealing surface, thus reduce the driving moment of valve rod, also reduce the Probability of condition of high temperature lower flashboard wedging.The utility model frictional force is little, and driving moment is little, and good airproof performance is wear-resistant, stable performance, is applicable to large electric power plant and nuclear power generating sets.
Accompanying drawing explanation
Fig. 1 is wedge block type double-flashboard gate valve structural representation of the present utility model.
Embodiment
Now with embodiment, the utility model is described in further details by reference to the accompanying drawings.
As shown in Figure 1, wedge block type double-flashboard gate valve of the present utility model, comprises left flashboard 3, right flashboard 5, valve rod 6, upper voussoir 4, lower wedge block 1 and spring 2.Wherein, valve rod 6 inserts between left flashboard 3 and right flashboard 5, and lower wedge block 1 is fixed on the lower end of valve rod 6, and upper voussoir 4 is positioned at the other end of valve rod 6, and can move up and down along valve rod 6.During valve closing, drive unit band ovable valve stem 6 moves downward, and when lower wedge block 1 encounters the positioning boss of body base, valve rod 6 drives upper voussoir 4 to continue descending, and in descending process, valve rod axial force is converted into left and right valve base sealing power, reaches reliable sealing.During valve opening, drive unit band ovable valve stem 6 moves upward, and valve rod 6 drives upper voussoir 4 to make it be separated with lower wedge block 1, and when valve rod head contacts with upper seal support, flashboard assembly departs from passage and completes breakdown action.
The upper-end surface of lower wedge block 1 of the present utility model is inclined-plane, and the lower end surface of upper voussoir 4 is arc surface, is a line, reduces frictional force when two voussoirs move mutually, reduce the driving moment of valve rod during upper lower wedge block contact.Because angle of wedge size directly affects the size of valve opening and closing moment, by the angle of wedge reasonable in design, the driving moment of valve rod can be reduced, reduce drive unit grade, save manufacture cost, avoid the self-locking of lower wedge block simultaneously, guarantee that valve is normally opened.Preferably, the angle range of the upper-end surface of the utility model lower wedge block is 30 °-75 °.
A helical spring 2 is set between upper and lower voussoir, voussoir 4 is acted on by helical spring 2 pretightening force first when opening, to one active force upwards, reduce valve rod 6 in the driving moment of opening moment, second when closing, lower wedge block 1 contacts the moment of body base location, because the driving moment of drive unit is comparatively large, the axial force of valve rod is comparatively large, and helical spring 2 can cushion the impulsive load of voussoir 4 pairs of lower wedge blocks 1.
Because upper lower wedge block is linear contact lay when closing, stress is comparatively large, so to upper lower wedge block surface of contact pile-up welding hard alloy, increases wear resistance, increases the service life.
Claims (3)
1. a wedge block type double-flashboard gate valve, is characterized in that, comprises left flashboard, right flashboard, valve rod, upper voussoir, lower wedge block and spring; Described valve rod inserts between left flashboard and right flashboard, and described lower wedge block is fixed on the lower end of valve rod, and described upper voussoir is positioned at the other end of valve rod, and can move up and down along valve rod; One end of described spring is fixed on the upper-end surface of lower wedge block, and the other end freely upward; The upper-end surface of described lower wedge block is inclined-plane, and the angle range of the upper-end surface of described lower wedge block is 30 °-75 °; The lower end surface of described upper voussoir is arc surface.
2. a kind of wedge block type double-flashboard gate valve according to claim 1, is characterized in that, described spring is helical spring.
3. a kind of wedge block type double-flashboard gate valve according to claim 1, is characterized in that, the upper-end surface of described lower wedge block and the lower end surface pile-up welding hard alloy of described upper voussoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520184747.7U CN204985791U (en) | 2015-03-30 | 2015-03-30 | Voussoir formula dual -gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520184747.7U CN204985791U (en) | 2015-03-30 | 2015-03-30 | Voussoir formula dual -gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204985791U true CN204985791U (en) | 2016-01-20 |
Family
ID=55120159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520184747.7U Expired - Fee Related CN204985791U (en) | 2015-03-30 | 2015-03-30 | Voussoir formula dual -gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204985791U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776239A (en) * | 2015-03-30 | 2015-07-15 | 苏州福润机械有限公司 | Wedge type dual gate valve |
-
2015
- 2015-03-30 CN CN201520184747.7U patent/CN204985791U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776239A (en) * | 2015-03-30 | 2015-07-15 | 苏州福润机械有限公司 | Wedge type dual gate 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160330 |