CN101988590A - Eccentric two-way sealing butterfly valve - Google Patents
Eccentric two-way sealing butterfly valve Download PDFInfo
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- CN101988590A CN101988590A CN 201010535203 CN201010535203A CN101988590A CN 101988590 A CN101988590 A CN 101988590A CN 201010535203 CN201010535203 CN 201010535203 CN 201010535203 A CN201010535203 A CN 201010535203A CN 101988590 A CN101988590 A CN 101988590A
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- valve
- eccentric
- butterfly
- butterfly valve
- pressure
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Abstract
The invention provides an eccentric two-way sealing butterfly valve. The valve seat of the butterfly valve consists of an independent floating valve seat and O-shaped seal rings on the floating valve seat to form a new sealing pair, wherein the side face and the bottom of the valve seat are provided with plastic or rubber O-shaped seal rings. The eccentric two-way sealing butterfly valve has the advantages that the valve can bear pressure (within 1.25 times the nominal pressure) which is applied by a medium from any side; and the aim of preventing the medium from reflowing can be fulfilled by arranging one eccentric two-way pressure butterfly valve on a pipeline and not arranging a check valve or other two-way pressure valves.
Description
Technical field
The present invention relates to a kind of butterfly valve structure, be specifically related to medium and enter the eccentric two-way seal butterfly valve that this valve all can be blocked and reach the zero leakage requirement from any end.
Background technique
Eccentric-butterfly-valve in traditional manufacturing because manufacturing process and structural reason, always entering medium on butterfly valve butterfly plate closing direction could seal fully, and when entering medium in the opposite direction, increasing along with pressure medium, reason owing to the butterfly valve eccentric structure, can cause butterfly valve butterfly plate and valve rod to be subjected to one and make the thrust of valve on opening direction, the used driving force direction of this thrust and throttle down is opposite, that is to say to allow the pretension specific pressure of valve reduce that leaking will appear in butterfly valve after the pretension specific pressure is reduced to minimum seal pressure.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that changes existing eccentric-butterfly-valve structure, provides a kind of eccentric two-way seal butterfly valve of floating seal.
The present invention solves the problems of the technologies described above by the following technical programs: remove the directly structure on valve body of valve body sealing surface, do a unsteady valve seat in addition, the O-ring seals of plastics or rubber material is arranged at this valve seat side and bottom, sealing surface weld deposit 13Cr, STL or other alloy.When medium when closing the butterfly plate pressuring direction, this valve seat is not stopped by the valve body boss can produce displacement backward, this moment, seal pressure will increase (the same with common eccentric-butterfly-valve) along with the increase of pressure.And when entering medium in the opposite direction, increasing along with pressure medium, reason owing to the butterfly valve eccentric structure, can cause butterfly valve butterfly plate and valve rod to be subjected to one and make the thrust of valve on opening direction, the used driving force direction of this thrust and throttle down is opposite, that is to say and to allow the pretension specific pressure of valve reduce, but because the existence of floating valve seat, this moment, medium can promote valve seat being pressed on the multi-layer sealed circle tightly, made the pretension specific pressure reach seal request greater than minimum seal pressure all the time.This eccentric two-way seal butterfly valve is achieved in that the handwheel on the gear links to each other with valve rod by key, valve rod passes valve body and is fixed on the butterfly plate by straight pin, multi-layer sealed circle is pressed on sealing pair of formation on the butterfly plate by pressing plate circle and socket head screw, and the O-ring seals of floating valve seat and its side and bottom surface is arranged in sealing pair inside; There are upper bearing (metal) and lower bearing in the valve rod top and the bottom, sealing gasket quilt stifle down is pressed on the valve body lower shaft hole with socket head screw, support one end is fixed on the valve body upper shaft hole flange with stud, elastic washer, nut, and the other end links to each other with gear with stud, elastic washer, nut.
The feature that the present invention has utilized fluid itself to be had has cleverly been utilized the principle of fluid pressure difference cleverly, thereby has realized utilizing the thrust of fluid that floating valve seat is pushed to the effect that multi-layer sealed circle is realized two-way equal energy sealing.With respect to common eccentric-butterfly-valve, advantage of the present invention and effect are:
(1) eccentric two-way need only be installed on the pipeline presses butterfly valve and needn't increase the purpose that safety check or other two-way pressure valve just can reach the prevention medium back flow in addition again, save cost and improve Safety performance, can bear medium from any side applied pressure (in 1.25 times of nominal pressure);
(2) can reduce to force oppositely to seal valve rod and the drive unit that is increased, economical with materials reduces cost;
(3) during complete shut-down, the elastic energy of the O-ring seals of floating valve seat bottom is effectively alleviated the excessive deformation of multi-layer sealed circle, prevents to damage whole multi-layer sealed circle and causes valve leak;
(4) precision of the self-locking requirement of drive unit and driving dimensional chain can reduce;
(5) change floating valve seat conveniently;
(6) can whole valve body be scrapped;
(7) floating valve seat can select to be higher than the material of valve body, can be more wear-resisting, corrosion-resistant, reduce the replacing and the dead time of valve.
Description of drawings
Fig. 1 is a plan view of the present invention.Fig. 2 is a left view of the present invention.
Among the figure:
2 times stifle 3 socket head screws of 1 valve body
4 sealing gaskets, 5 lower bearings, 6 floating valve seats
7O shape seal ring 8 valve rods 9 straight pins
10 butterfly plates, 11 pressing plate circles, 12 socket head screws
13 multi-layer sealed circle 14 upper bearing (metal)s 15 fillers
16 Glands, 17 supports, 18 elastic washers
19 nuts, 20 stud, 21 stud
22 nuts, 23 stud, 24 elastic washers
25 nuts, 26 gears, 27 keys
Embodiment
The present invention is the improvement of carrying out according to the existing reed valve structural imperfection, increased the floating seal valve seat according to the prerequisite requirement of sealing, promoted the floating valve seat generation by fluid and allow greater than the mode of minimum seal pressure and can seal on the both direction of butterfly valve.
Accompanying drawing 2 is left views of the present invention, as shown in the figure, the moment of input gear 26 (also can be that other is as Electric actuator, Hydraulic actuator or handle etc.) drives valve rod 8 by key 27 and rotates, valve rod moment drives butterfly plate 10 by straight pin 9 and multi-layer sealed circle 13 (multi-layer sealed circle 13 is fixed on the butterfly plate 10 by socket head screw 12 and pressing plate circle 11) rotates, multi-layer sealed circle 13 makes valve closing near floating valve seat 6 gradually when turning clockwise, and multi-layer sealed circle 13 makes valve opening away from floating valve seat 6 gradually when being rotated counterclockwise.Be in the butterfly valve (seeing accompanying drawing 2) under the buttoned-up status, when medium enters by valve body 1 inner chamber from the left side as figure, eccentric thrust is to help on the valve seal direction on the butterfly plate 10 that pressure medium produces, can close tight more this moment under the situation that each component strength and stiffness allows more, the seal pressure of the high more generation of pressure medium is big more, forms more reliable sealing; When medium when the right side as figure enters the inner chamber of valve body 1, the factor that can reduce seal pressure has: valve rod 8, butterfly plate 10 have trace to left dislocation (by the rigidity of himself and the size of the quality of fit decision displacement of each component); Eccentric thrust is on the direction of valve opening on the butterfly plate 10 that pressure medium produces.In order to remedy the seal pressure of reduction, the O-ring seals 7 of floating valve seat 6 and side has formed a piston, pushes multi-layer sealed circle 13 under the effect of pressure medium to, and formed like this seal pressure can seal greater than minimum seal pressure all the time.
Claims (3)
1. eccentric two-way seal butterfly valve, comprise valve body, it is characterized in that: the handwheel on the gear (26) links to each other with valve rod (8) by key (27), valve rod (8) passes valve body (1) and is fixed on the butterfly plate (10) by straight pin (9), multi-layer sealed circle (13) is pressed on upward sealing pair of formation of butterfly plate (10) by pressing plate circle (11) and socket head screw (12), and the O-ring seals (7) of floating valve seat (6) and its side and bottom surface is arranged in sealing pair inside; There are upper bearing (metal) (14) and lower bearing (5) in valve rod (8) top and the bottom, sealing gasket (4) is descended stifle (2) to be pressed on valve body (1) lower shaft hole with socket head screw (3), support (17) one ends are fixed on the valve body upper shaft hole flange with stud (21), elastic washer (18), nut (19), and the other end links to each other with gear (26) with stud (23), elastic washer (24), nut (25).
2. eccentric two-way seal butterfly valve according to claim 1 is characterized in that: the material of O-ring seals (7) can be selected plastics or rubber for use.
3. eccentric two-way seal butterfly valve according to claim 1 is characterized in that: sealing surface weld deposit can be selected 13Cr, STL or other alloy for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010535203 CN101988590A (en) | 2010-11-05 | 2010-11-05 | Eccentric two-way sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010535203 CN101988590A (en) | 2010-11-05 | 2010-11-05 | Eccentric two-way sealing butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101988590A true CN101988590A (en) | 2011-03-23 |
Family
ID=43745287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010535203 Pending CN101988590A (en) | 2010-11-05 | 2010-11-05 | Eccentric two-way sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101988590A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964047A (en) * | 2015-07-02 | 2015-10-07 | 中山铁王流体控制设备有限公司 | Dual-angle three-eccentricity hard sealing butterfly valve |
| CN114909481A (en) * | 2022-05-31 | 2022-08-16 | 江苏南通发电有限公司 | Plate turnover type pressure release valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238356Y (en) * | 1996-02-05 | 1996-10-23 | 曾所罗 | High performance leakproof eccentric butterfly bamper |
| KR20040046013A (en) * | 2002-11-26 | 2004-06-05 | 주식회사 에이스브이 | Seat of bidirectional butterfly valve having inside elastic member |
| JP2007170616A (en) * | 2005-12-26 | 2007-07-05 | Niigata Loading Systems Ltd | Sealing device for eccentric butterfly valve |
| CN201246473Y (en) * | 2008-08-28 | 2009-05-27 | 石家庄三环阀门股份有限公司 | Bidirectional eccentric metal hard seal butterfly valve |
| CN101545540A (en) * | 2008-03-26 | 2009-09-30 | 上海埃维玛阀门有限公司 | Double eccentric butterfly valve |
| CN201916502U (en) * | 2010-11-05 | 2011-08-03 | 江苏苏威阀门有限公司 | Eccentric bidirectional seal butterfly valve |
-
2010
- 2010-11-05 CN CN 201010535203 patent/CN101988590A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238356Y (en) * | 1996-02-05 | 1996-10-23 | 曾所罗 | High performance leakproof eccentric butterfly bamper |
| KR20040046013A (en) * | 2002-11-26 | 2004-06-05 | 주식회사 에이스브이 | Seat of bidirectional butterfly valve having inside elastic member |
| JP2007170616A (en) * | 2005-12-26 | 2007-07-05 | Niigata Loading Systems Ltd | Sealing device for eccentric butterfly valve |
| CN101545540A (en) * | 2008-03-26 | 2009-09-30 | 上海埃维玛阀门有限公司 | Double eccentric butterfly valve |
| CN201246473Y (en) * | 2008-08-28 | 2009-05-27 | 石家庄三环阀门股份有限公司 | Bidirectional eccentric metal hard seal butterfly valve |
| CN201916502U (en) * | 2010-11-05 | 2011-08-03 | 江苏苏威阀门有限公司 | Eccentric bidirectional seal butterfly valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964047A (en) * | 2015-07-02 | 2015-10-07 | 中山铁王流体控制设备有限公司 | Dual-angle three-eccentricity hard sealing butterfly valve |
| CN114909481A (en) * | 2022-05-31 | 2022-08-16 | 江苏南通发电有限公司 | Plate turnover type pressure release valve |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110323 |