CN201916502U - Eccentric bidirectional seal butterfly valve - Google Patents
Eccentric bidirectional seal butterfly valve Download PDFInfo
- Publication number
- CN201916502U CN201916502U CN2010205964706U CN201020596470U CN201916502U CN 201916502 U CN201916502 U CN 201916502U CN 2010205964706 U CN2010205964706 U CN 2010205964706U CN 201020596470 U CN201020596470 U CN 201020596470U CN 201916502 U CN201916502 U CN 201916502U
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- CN
- China
- Prior art keywords
- valve
- eccentric
- butterfly
- seal
- butterfly valve
- 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 provides an eccentric bidirectional seal butterfly valve. In a valve seat of the butterfly valve, an independent floating valve seat and an O-shaped ring on the floating valve seat form a new seal pair. The side surface and the bottom of the valve seat are provided with plastic or rubber O-shaped seal rings. The eccentric bidirectional seal butterfly valve can bear pressure (which is within 1.25 times of nominal pressure) exerted by a medium from either side, only one eccentric bidirectional seal butterfly valve needs to be arranged in a pipeline and a check valve or other bidirectional pressure valves do not need to be additionally added so that the purpose of preventing backflow of the medium can be achieved.
Description
Technical field
The utility model relates to a kind of butterfly valve structure, is specifically related to medium and enters 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 in the utility model is the deficiency that changes existing eccentric-butterfly-valve structure, provides a kind of eccentric two-way seal butterfly valve of floating seal.
The utility model 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 utility model 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 utility model 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 utility model.Fig. 2 is a left view of the present utility model.
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 utility model 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 utility model, 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 (2)
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) is selected plastics or rubber for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205964706U CN201916502U (en) | 2010-11-05 | 2010-11-05 | Eccentric bidirectional seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205964706U CN201916502U (en) | 2010-11-05 | 2010-11-05 | Eccentric bidirectional seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201916502U true CN201916502U (en) | 2011-08-03 |
Family
ID=44416299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205964706U Expired - Fee Related CN201916502U (en) | 2010-11-05 | 2010-11-05 | Eccentric bidirectional seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201916502U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988590A (en) * | 2010-11-05 | 2011-03-23 | 江苏苏威阀门有限公司 | Eccentric two-way sealing butterfly valve |
-
2010
- 2010-11-05 CN CN2010205964706U patent/CN201916502U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988590A (en) * | 2010-11-05 | 2011-03-23 | 江苏苏威阀门有限公司 | Eccentric two-way sealing butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20131105 |