CN101545540A - Double eccentric butterfly valve - Google Patents
Double eccentric butterfly valve Download PDFInfo
- Publication number
- CN101545540A CN101545540A CN200810035179A CN200810035179A CN101545540A CN 101545540 A CN101545540 A CN 101545540A CN 200810035179 A CN200810035179 A CN 200810035179A CN 200810035179 A CN200810035179 A CN 200810035179A CN 101545540 A CN101545540 A CN 101545540A
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- valve
- valve body
- butterfly plate
- butterfly
- double eccentric
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Abstract
The invention discloses a double eccentric butterfly valve, which relates to a valve. The valve comprises a valve rod, a valve seat, a valve cover, a butterfly plate and a valve body, wherein the valve rod is arranged in the valve body; the upper and lower ends of the valve rod are provided with end covers; the upper and lower end covers are fixed with the valve body through hex bolts; gaskets are arranged at the connecting positions of the hex bolts and the valve body; a thrust bearing is arranged between the lower end cover and the bottom end of the valve rod; and a shaft housing is arranged outside the thrust bearing. The butterfly plate is arranged at the middle part of the valve rod, the butterfly plate and the valve rod are connected through a pin shaft, the bottom of the butterfly plate is externally sleeved with the valve cover, the valve cover and the valve body are fixed with each other through a hexagon socket head cap bolt, the hexagon socket head cap bolt is externally sleeved with an O ring, the valve seat is arranged at the contact position of the valve cover, the butterfly plate and the valve body, and the valve seat can perform bidirectional sealing on a fluid.
Description
The technology neighborhood:
The present invention relates to a kind of valve, specifically is a kind of double eccentric butterfly valve.
Background technique:
Double eccentric butterfly valve (butterfly valve) is meant that closure member valve plate, valve rod are eccentric in valve plate and rotate a kind of valve that reaches open and close around valve shaft, and main rising cut off and throttling usefulness on pipeline.The double eccentric butterfly valve open-shut device is a discoidal butterfly plate, and the axis around himself in valve body rotates, thereby reaches the purpose that opens and closes or regulate.Normally less than 90 °, double eccentric butterfly valve and butterfly bar itself do not have self-lock ability to the double eccentric butterfly valve standard-sized sheet to complete shut-down, for the location of butterfly plate, install worm speed reducer additional on valve rod.Adopt worm speed reducer, not only can make butterfly plate have self-lock ability, butterfly plate is stopped on the arbitrary position, can also improve the operating characteristics of valve.The characteristics of the special-purpose double eccentric butterfly valve of industry can be high temperature resistant, and suitable pressure range is also higher, and valve body adopts manufacturings such as carbon steel, stainless steel or cast iron, and the seal ring of valve plate adopts metal ring or the contour performance materials of PTFE to replace rubber ring.The large high-temperature double eccentric butterfly valve adopts the steel plate welding to make, and is mainly used in the cigarette air channel and the gas pipe line of high temperature media.Major advantage has that 1. open-close convenient are rapid, laborsaving, fluid resistance is little, can often operate; 2. simple in structure, volume is little, and is in light weight; 3. can transport mud, it is minimum to accumulate liquid in pipeline opening; In depress, can realize good sealing; 5. adjusting function is good.
In view of the above the characteristic of double eccentric butterfly valve is done further raising.
Summary of the invention:
Technical problem to be solved by this invention provides a kind ofly can overcome that the traditional double eccentric-butterfly-valve is not high pressure resistant, torsion is big, the double eccentric butterfly valve of high pressure resistant, the two way sealed of short point of life-span.
The present invention's technological scheme that adopts of dealing with problems is:
A kind of double eccentric butterfly valve comprises valve rod, valve seat, valve gap, butterfly plate and valve body, it is characterized in that:
Described valve rod is installed in the valve body, upper and lower end is installed with end cap, and end cap is fixed together by hex head bolt and valve body up and down, and the connection part of hex head bolt and valve body is provided with pad, between the bottom of described lower end cap and valve rod thrust bearing is installed, thrust bearing is provided with axle sleeve outward.
Butterfly plate is installed in the middle of the described valve body, connect together by bearing pin between butterfly plate and the valve rod, be with valve gap outside the bottom of butterfly plate, fix by hexagon socket head cap screw between valve gap and the valve body, hexagon socket head cap screw is with zero shape circle outward, between the contact position of described valve gap, butterfly plate and valve body valve seat is installed, valve seat can convection cell passes through two way sealed.
Working principle of the present invention is, in Fig. 3, when fluid enters from the A direction, the thrust that produces on the butterfly plate makes the very big sealing force of generation between butterfly plate and the valve seat, plays the effect of sealing; When fluid when the B direction enters, the thrust that produces on the valve seat makes the very big sealing force of generation between valve seat and the butterfly plate, plays sealing effect; When the moment that butterfly plate is opened, the sealing force on the valve seat just disappears automatically, and valve seat returns to the home position.
The invention has the beneficial effects as follows: the two way sealed structure on the double eccentric butterfly valve has the selfsealings design, and no matter fluid enters from that direction, and multipotency reaches stable sealing effect, and pressure is high more, and sealing effect is good more.Having overcome the traditional double eccentric-butterfly-valve can not be high temperature resistant.The characteristics that torsion is big, the life-span is short.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the cross-sectional view of Fig. 1;
Fig. 3 is a local enlarged diagram among Fig. 2;
1-hex head bolt, 2-pad, 3-lower end cap, 4-adjustment pad, 5-lower levelling plate, 6-thrust bearing, 7-axle sleeve, 8-butterfly plate, 9-taper pin, 10-valve seat, 11-valve gap, 12-hexagon socket head cap screw, 13-zero shape circle, 14-packing ring, 15-valve stem packing ring, 16-valve stem seal pressure ring, 17-valve rod, 18-upper end cap, 19-valve body, 20-hexagon nut, 21-stud bolt.
Embodiment:
The invention will be described further to reach embodiment below with reference to the accompanying drawings:
In Fig. 1,2, double eccentric butterfly valve of the present invention comprises columniform valve rod 17, outside valve rod 17, be with valve body 19, end cap 18 is installed on the top of valve rod 17, be equipped with on the upper end cap 18 between stud bolt 21 and the valve body 19 by hexagon nut 20 and pad 2 fixing seals, the lower end of valve rod 17 is by lower end cap 3 sealings, between lower end cap 3 and valve rod 17 bottoms, install and adjust pad 4, thrust bearing 6, thrust bearing 6 overcoat Upper shaft sleeves 7, by hex head bolt 1 and lower levelling plate 5 fixing seals, be with pad 2 on the hex head bolt 1 between lower end cap 3 and the valve body 19.Also be with valve stem packing ring 15 between the top of valve rod 17 and the valve body 19, packing ring 14 and valve stem seal pressure ring 16.
In Fig. 2,3, butterfly plate 8 is installed by round pin axle 9 in the middle part of valve body, the butterfly plate 8 outer valve gaps 11 of installing of bottom, between valve gap 11 and valve body 19, enclose 13 fixing seals by hexagon socket head cap screw 12 and zero shape that is arranged on valve gap 11 peripheries, at valve gap 11, position, a space is left at the position that butterfly plate 8 is connected with valve body 19, and valve seat 10 is installed on the position, space, the upper end sealing and fixing of valve seat 10 is between valve gap 11 and valve body 19, and the lower end closely contacts with butterfly plate 8.When the A direction entered, the thrust that produces on the butterfly plate 8 made the very big sealing force of generation between butterfly plate 8 and the valve seat 10, plays the effect of sealing at fluid; When the B direction entered, the thrust that produces on the valve seat 10 made the very big sealing force of generation between valve seat 10 and the butterfly plate 8, plays sealing effect at fluid; When the moment that butterfly plate 8 is opened, the sealing force on the valve seat 10 just disappears automatically, and valve seat 10 returns to the home position.
More than show and described basic principle of the present invention and technical characteristics and major advantage.The technician of the industry can understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all should fall in the claimed scope of the present invention.The scope of protection of present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. double eccentric butterfly valve, comprise valve rod, valve seat, valve gap, butterfly plate and valve body, it is characterized in that: described valve rod is installed in the valve body, upper and lower end is installed with upper end cap and lower end cap, butterfly plate is installed in the middle of the described valve body, is with valve gap outside the bottom of butterfly plate, fix by hexagon socket head cap screw between valve gap and the valve body, between the contact position of described valve gap, butterfly plate and valve body valve seat is installed, valve seat can convection cell passes through two way sealed.
2. double eccentric butterfly valve according to claim 1 is characterized in that: described lower end cap is fixed together by hex head bolt and valve body, and the connection part of hex head bolt and valve body is provided with pad.
3. double eccentric butterfly valve according to claim 1 is characterized in that: between the bottom of described lower end cap and valve rod thrust bearing is installed, thrust bearing is provided with axle sleeve outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810035179A CN101545540A (en) | 2008-03-26 | 2008-03-26 | Double eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810035179A CN101545540A (en) | 2008-03-26 | 2008-03-26 | Double eccentric butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101545540A true CN101545540A (en) | 2009-09-30 |
Family
ID=41192841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810035179A Pending CN101545540A (en) | 2008-03-26 | 2008-03-26 | Double eccentric butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101545540A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865295A (en) * | 2010-06-13 | 2010-10-20 | 无锡智能自控工程有限公司 | Shaft-end positioning structure of butterfly valve transmission shaft |
| CN101988590A (en) * | 2010-11-05 | 2011-03-23 | 江苏苏威阀门有限公司 | Eccentric two-way sealing butterfly valve |
| CN102486233A (en) * | 2010-12-03 | 2012-06-06 | 浙江正华阀门厂 | High-temperature and high-pressure butterfly valve for bidirectional flow self-sealing elastic valve seat |
| CN104350312A (en) * | 2012-04-25 | 2015-02-11 | Qtrco公司 | Double-offset butterfly valve |
| CN105465383A (en) * | 2016-01-08 | 2016-04-06 | 无锡科磊阀业有限公司 | Eccentric butterfly valve structure with self-compensating function |
-
2008
- 2008-03-26 CN CN200810035179A patent/CN101545540A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865295A (en) * | 2010-06-13 | 2010-10-20 | 无锡智能自控工程有限公司 | Shaft-end positioning structure of butterfly valve transmission shaft |
| CN101988590A (en) * | 2010-11-05 | 2011-03-23 | 江苏苏威阀门有限公司 | Eccentric two-way sealing butterfly valve |
| CN102486233A (en) * | 2010-12-03 | 2012-06-06 | 浙江正华阀门厂 | High-temperature and high-pressure butterfly valve for bidirectional flow self-sealing elastic valve seat |
| CN104350312A (en) * | 2012-04-25 | 2015-02-11 | Qtrco公司 | Double-offset butterfly valve |
| CN105465383A (en) * | 2016-01-08 | 2016-04-06 | 无锡科磊阀业有限公司 | Eccentric butterfly valve structure with self-compensating function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
Open date: 20090930 |