CN104776239A - Wedge type dual gate valve - Google Patents
Wedge type dual gate valve Download PDFInfo
- Publication number
- CN104776239A CN104776239A CN201510144314.3A CN201510144314A CN104776239A CN 104776239 A CN104776239 A CN 104776239A CN 201510144314 A CN201510144314 A CN 201510144314A CN 104776239 A CN104776239 A CN 104776239A
- Authority
- CN
- China
- Prior art keywords
- valve rod
- valve
- wedge block
- wedge
- flashboard
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
- F16K3/18—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The invention discloses a wedge type dual gate valve, comprising a left gate plate, a right gate plate, a valve rod, an upper wedge, a lower wedge and a spring, wherein the valve rod is inserted between the left gate plate and the right gate plate; the lower wedge is fixed at the lower end of the valve rod; the upper wedge is positioned at the other end of the valve rod and can move up and down along the valve rod; when the valve is closed, a drive device drives the valve rod to move downwards; when the lower wedge touches a positioning boss at the bottom of a valve body, the valve rod drives the upper wedge to downwards move continuously; in the downward moving process, axial force of the valve rod is converted to sealing force for left and right valve seats, and reliable sealing is realized. When the valve is opened, the drive device drives the valve rod to move upwards, the valve rod drives the upper wedge to separate from the lower wedge, and when the head of the valve rod contacts an upper sealing seat, a gate plate assembly is separated from the channel to finish an opening action. The wedge type dual gate valve is small in friction force, small in drive torque, good in sealing property, wear-resistant, stable in performance, and suitable for large-scale thermal power and nuclear power units.
Description
Technical field
The present invention 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.
Summary of the invention
The object of the present invention is to provide a kind of wedge block type double-flashboard gate valve, good airproof performance, stable performance, be applicable to large electric power plant and nuclear power generating sets.
For achieving the above object, the technical solution used in the present invention 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 present invention 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.Frictional force of the present invention 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 invention.
Embodiment
Now with embodiment, the present invention 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 invention, 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 invention 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 lower wedge block of the present invention 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 (6)
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.
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 is inclined-plane.
4. a kind of wedge block type double-flashboard gate valve according to claim 1, is characterized in that, the lower end surface of described upper voussoir is arc surface.
5. a kind of wedge block type double-flashboard gate valve according to claim 3, is characterized in that, the angle range of the upper-end surface of described lower wedge block is 30 °-75 °.
6. 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 |
|---|---|---|---|
| CN201510144314.3A CN104776239A (en) | 2015-03-30 | 2015-03-30 | Wedge type dual gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510144314.3A CN104776239A (en) | 2015-03-30 | 2015-03-30 | Wedge type dual gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104776239A true CN104776239A (en) | 2015-07-15 |
Family
ID=53617885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510144314.3A Pending CN104776239A (en) | 2015-03-30 | 2015-03-30 | Wedge type dual gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104776239A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2525317Y (en) * | 2001-11-12 | 2002-12-11 | 浙江海工阀门厂 | High temperature double gate plate plane sluice valve |
| CN101413590A (en) * | 2008-09-10 | 2009-04-22 | 华东阀门有限公司 | Supporting type double-seal double-gate plate flat plate gate valve |
| CN201568595U (en) * | 2009-12-01 | 2010-09-01 | 南通国电电站阀门有限公司 | Inner wedge support type parallel double-flashboard gate valve |
| CN202118287U (en) * | 2011-06-29 | 2012-01-18 | 徐建东 | Lifting rod type parallel double disc gate valve |
| CN202451867U (en) * | 2012-02-10 | 2012-09-26 | 华东阀门有限公司 | Gate valve |
| CN103671993A (en) * | 2012-09-20 | 2014-03-26 | 昆山尚达智机械有限公司 | Novel gate valve |
| CN104329478A (en) * | 2014-09-01 | 2015-02-04 | 江苏亿阀集团有限公司 | Axial expanding type gate valve with double valve cores |
| CN204985791U (en) * | 2015-03-30 | 2016-01-20 | 苏州福润机械有限公司 | Voussoir formula dual -gate valve |
-
2015
- 2015-03-30 CN CN201510144314.3A patent/CN104776239A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2525317Y (en) * | 2001-11-12 | 2002-12-11 | 浙江海工阀门厂 | High temperature double gate plate plane sluice valve |
| CN101413590A (en) * | 2008-09-10 | 2009-04-22 | 华东阀门有限公司 | Supporting type double-seal double-gate plate flat plate gate valve |
| CN201568595U (en) * | 2009-12-01 | 2010-09-01 | 南通国电电站阀门有限公司 | Inner wedge support type parallel double-flashboard gate valve |
| CN202118287U (en) * | 2011-06-29 | 2012-01-18 | 徐建东 | Lifting rod type parallel double disc gate valve |
| CN202451867U (en) * | 2012-02-10 | 2012-09-26 | 华东阀门有限公司 | Gate valve |
| CN103671993A (en) * | 2012-09-20 | 2014-03-26 | 昆山尚达智机械有限公司 | Novel gate valve |
| CN104329478A (en) * | 2014-09-01 | 2015-02-04 | 江苏亿阀集团有限公司 | Axial expanding type gate valve with double valve cores |
| CN204985791U (en) * | 2015-03-30 | 2016-01-20 | 苏州福润机械有限公司 | Voussoir formula dual -gate valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150715 |