CN202746629U - Double soft sealing flat-plate gate valve - Google Patents
Double soft sealing flat-plate gate valve Download PDFInfo
- Publication number
- CN202746629U CN202746629U CN201220443252.8U CN201220443252U CN202746629U CN 202746629 U CN202746629 U CN 202746629U CN 201220443252 U CN201220443252 U CN 201220443252U CN 202746629 U CN202746629 U CN 202746629U
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- China
- Prior art keywords
- valve
- valve seat
- valve body
- flashboard
- seal
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- 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 - Lifetime
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Abstract
The utility model relates to a double soft sealing flat-plate gate valve which comprises a valve body, a valve cover, a gate plate, a valve seat, a valve rod and a bracket, wherein the valve body is coaxially connected with the valve cover through a stud and a nut; the valve cover is coaxially connected with the bracket through a stud and a nut; the valve rod and the gate plate are coaxially mounted; the valve seat is mounted between the gate plate and the valve body; a gate plate rectangular sealing ring is mounted on the valve seat between the valve seat and the gate plate; a valve body rectangular sealing ring is mounted on the valve seat between the valve seat and the valve body; a dovetail groove is formed in the valve seat above the gate plate rectangular sealing ring; a gate plate O-shaped ring is embedded in the dovetail groove; and the O-shaped ring is 0.6-0.8 mm higher than the metal sealing surface. As an RPTFE soft sealing ring and a rubber O-shaped ring are embedded on the sealing surface of the valve seat, the sealing between the valve seat and the valve body is guaranteed through the two O-shaped rings and the valve seat is kept in contact with the gate plate under an effect of a spring, the flat-plate gate valve provided by the utility model has the advantages of simple structure, scientific design, reliable sealing and easiness for machining when being compared with the traditional structure.
Description
Technical field
The utility model belongs to the valve class, relates to gate valve, the Dual-soft seal plate valve that especially a kind of sealability is more excellent.
Background technique
At present, the rectangular seal that only is designed with one RPTFE on the ordinary flat gate valve seat.Because the seal pressure of PTFE seals before than the height of rubber, needing more spring to reach valve during low pressure, has strengthened switching torque.And, when in the medium impurity of containing being arranged, easily scratch soft sealing face, under gas medium, can not reach the sealing grade of zero leakage.
The model utility content
The utility model is to overcome the deficiencies in the prior art, and the plate valve with Dual-soft seal that a kind of sealability is high, switching torque is little is provided.
The purpose of this utility model is achieved in that
A kind of plate valve of Dual-soft seal, comprise valve body, valve gap, flashboard, valve seat, valve rod, support, valve body and valve gap adopt double-screw bolt and nut is coaxial is connected, between valve gap and valve rod, filler is installed, valve gap is with the coaxial employing double-screw bolt of support and nut is coaxial is connected, valve rod and the coaxial installation of flashboard, between flashboard and valve body, valve seat is installed, valve seat between valve seat and flashboard is equipped with the flashboard rectangular seal, valve seat between valve seat and valve body is equipped with the valve body rectangular seal, it is characterized in that: the valve seat above the flashboard rectangular seal is shaped with a dovetail groove, insert one flashboard O type circle in this dovetail groove, this O type circle exceeds metallic sealing section 0.6～0.8mm, and flashboard rectangular seal and flashboard O type circle form double seal.
And the valve seat in valve body rectangular seal inboard is shaped with a dovetail groove, insert one valve body O type circle in this dovetail groove, and this valve body O type circle and valve body rectangular seal form double seal.
And, valve body and valve seat radially the valve seat on the surface of contact one spring is installed.
Advantage of the present utility model and good effect are:
1, this plate valve is inlayed one RPTFE soft seal circle with rubber o-ring at the sealing surface of valve seat, valve seat is by the sealing of twice O shape circle assurance with valve body, and under the effect of spring, keep in touch with flashboard, compare with conventional construction, simple in structure, design science, sealing is reliable, is easy to processing.
2, be processed with rectangle groove and dovetail groove on the valve seat of this plate valve, the former inlays the RPTFE seal ring, the latter is equipped with rubber o-ring, utilize rubber elasticity, good toughness, seal pressure is low, is difficult for the characteristics of scuffing, reaches the raising sealability, reduce the purpose of switching torque, be applicable to the particularly bigbore plate valve of the various bores of various pressure.
Description of drawings
Fig. 1 is cross section of the present utility model sectional structure chart;
Fig. 2 is the A section amplification view of Fig. 1;
Embodiment
Below in conjunction with accompanying drawing example of the present utility model is further described; Need to prove: the present embodiment is descriptive, is not determinate, can not limit protection domain of the present utility model with this.
A kind of plate valve with Dual-soft seal, comprise valve body 10, valve gap 6, flashboard 9, valve seat 8, valve rod 5, support 1, valve body adopts double-screw bolt and 7 coaxial connections of nut with valve gap, and seal by sealing gasket (not having label), filler 3 is installed between valve gap and valve rod, one grease injection device 4 radially is installed, valve gap and the coaxial employing double-screw bolt of support and 2 coaxial connections of nut on the valve gap of corresponding filler; Valve rod and the coaxial installation of flashboard are equipped with valve seat between flashboard and valve body.Valve seat between valve seat and flashboard is equipped with flashboard rectangular seal 14, and the valve seat between valve seat and valve body is equipped with valve body rectangular seal 11.
Above-mentioned is prior art.
Innovative point of the present utility model is:
1, the valve seat above the flashboard rectangular seal is shaped with a dovetail groove, insert one flashboard O type circle 15 in this dovetail groove, and this O type circle exceeds metallic sealing section 0.6～0.8mm, and flashboard rectangular seal and flashboard O type circle form double seal.
2, the valve seat in valve body rectangular seal inboard is shaped with a dovetail groove, insert one valve body O type circle 12 in this dovetail groove, and this valve body O type circle and valve body rectangular seal form double seal.
3, valve body and valve seat radially the valve seat on the surface of contact one spring 13 is installed, in order to guarantee contacting of valve seat and flashboard.
Working principle of the present utility model is:
During valve closing, rubber o-ring on the sealing surface of seat is under spring-force driven dual, at first be close on the flashboard sealing surface, increase along with pressure, RPTFE seal ring on the valve seat is compressed, until the valve seat metallic sealing section contacts with the flashboard sealing surface, forms together hard sealing, twice soft seal triple seal reaches zero leakage.In the valve open process, flashboard moves up, impurity on the flashboard sealing surface, dirt etc. are wiped off by the first RPTFE rectangular loop on two valve seats, guaranteed that second seal ring-O shape circle is not scratched, because the supporting effect of rectangular loop has reduced frictional force, the seal pressure of O shape rubber ring is little simultaneously, reduce spring, thereby reduced the operating torque of valve.
Claims (3)
1. the plate valve of a Dual-soft seal, comprise valve body, valve gap, flashboard, valve seat, valve rod, support, valve body and valve gap adopt double-screw bolt and nut is coaxial is connected, between valve gap and valve rod, filler is installed, valve gap is with the coaxial employing double-screw bolt of support and nut is coaxial is connected, valve rod and the coaxial installation of flashboard, between flashboard and valve body, valve seat is installed, valve seat between valve seat and flashboard is equipped with the flashboard rectangular seal, valve seat between valve seat and valve body is equipped with the valve body rectangular seal, it is characterized in that: the valve seat above the flashboard rectangular seal is shaped with a dovetail groove, insert one flashboard O type circle in this dovetail groove, this O type circle exceeds metallic sealing section 0.6～0.8mm, and flashboard rectangular seal and flashboard O type circle form double seal.
2. Dual-soft seal plate valve according to claim 1, it is characterized in that: the valve seat in valve body rectangular seal inboard is shaped with a dovetail groove, insert one valve body O type circle in this dovetail groove, this valve body O type circle and valve body rectangular seal form double seal.
3. Dual-soft seal plate valve according to claim 1 is characterized in that: valve body and valve seat radially the valve seat on the surface of contact one spring is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220443252.8U CN202746629U (en) | 2012-09-03 | 2012-09-03 | Double soft sealing flat-plate gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220443252.8U CN202746629U (en) | 2012-09-03 | 2012-09-03 | Double soft sealing flat-plate gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746629U true CN202746629U (en) | 2013-02-20 |
Family
ID=47706028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220443252.8U Expired - Lifetime CN202746629U (en) | 2012-09-03 | 2012-09-03 | Double soft sealing flat-plate gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746629U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307295A (en) * | 2013-07-05 | 2013-09-18 | 天津百利展发集团有限公司 | Low friction flat gate valve |
| CN104197032A (en) * | 2014-08-26 | 2014-12-10 | 自贡自高阀门有限公司 | Flat gate valve for long-distance conveying pipeline |
| CN107035878A (en) * | 2017-04-25 | 2017-08-11 | 重庆科特工业阀门有限公司 | The non-maintaining flat gate valve of valve stem packing |
| CN109723847A (en) * | 2018-12-29 | 2019-05-07 | 上海凯工阀门股份有限公司 | A kind of knife gate valve |
| CN109854767A (en) * | 2019-02-19 | 2019-06-07 | 成都乘风阀门有限责任公司 | Compound seal valve seat construction flat gate valve |
-
2012
- 2012-09-03 CN CN201220443252.8U patent/CN202746629U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307295A (en) * | 2013-07-05 | 2013-09-18 | 天津百利展发集团有限公司 | Low friction flat gate valve |
| CN104197032A (en) * | 2014-08-26 | 2014-12-10 | 自贡自高阀门有限公司 | Flat gate valve for long-distance conveying pipeline |
| CN107035878A (en) * | 2017-04-25 | 2017-08-11 | 重庆科特工业阀门有限公司 | The non-maintaining flat gate valve of valve stem packing |
| CN109723847A (en) * | 2018-12-29 | 2019-05-07 | 上海凯工阀门股份有限公司 | A kind of knife gate valve |
| CN109854767A (en) * | 2019-02-19 | 2019-06-07 | 成都乘风阀门有限责任公司 | Compound seal valve seat construction flat gate 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 |
Granted publication date: 20130220 |
|
| CX01 | Expiry of patent term |