CN204610884U - A kind of cut-off valve for heating gas medium - Google Patents
A kind of cut-off valve for heating gas medium Download PDFInfo
- Publication number
- CN204610884U CN204610884U CN201520292309.2U CN201520292309U CN204610884U CN 204610884 U CN204610884 U CN 204610884U CN 201520292309 U CN201520292309 U CN 201520292309U CN 204610884 U CN204610884 U CN 204610884U
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- valve
- valve plate
- rotating shaft
- cut
- heating gas
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Abstract
The utility model relates to a kind of cut-off valve for heating gas medium, be applicable to Metallurgical Enterprise.Comprise valve body, valve plate, rotating shaft and fourbar linkage, fourbar linkage is arranged in valve body by rotating shaft, and valve plate is arranged on the connecting rod of fourbar linkage, and valve plate is parallel with body wall; Described fourbar linkage is double rocker mechanism.Disc type plane sealing mode taked by the cut-off valve that the utility model is used for heating gas medium, valve plate can be 90o and rotate, rotating shaft only has rotation in the course of the work, not rectilinear movement, therefore rotating shaft is adhered to tar many again and also can not affect its motion, effectively solve valve plate and the sealing problem of valve body and the sealing problem at pitman shaft place, add valve working reliability and working life.
Description
Technical field
The utility model relates to a kind of cut-off valve for heating gas medium, be applicable to Metallurgical Enterprise.
Background technique
In large-scale associating iron and steel enterprise, steel rolling heating furnace is fuel used is generally blast furnace gas or mixed gas, and for bar mill, producer gas and rock gas become main fuel, and recuperative heater is widely used because of its superior energy-saving effect.For rock gas, blast furnace gas, mixed gas, cutting valve soon and can adopt butterfly valve, selector valve etc. in recuperative heater.And for producer gas, adopt common butterfly valve and cut valve soon and there is very large problem as cut-off valve, the oven become using producer gas as fuel is using a difficult point in regenerative heat technology process.
1) because heating gas is produced by gas producer, temperature is at 450 DEG C--and between 550 DEG C, there is a large amount of tar to exist.
2) operating mode of next valve, frequently exchanges, requires action in 120 seconds to 150 seconds once, can not change easily once use.Because iron and steel enterprise is all continuous seepage mode, if it is out of joint to cut valve soon, that group that it controls or several groups of burners must be stopped using, and directly affect production.
3) require that valve in use seals grade and can reach between IV grade and V grade, can ensure like this to cut soon this valve after valve fast shut-off the burner energy cutoff of pipe.
4) require it is that valve response is quick: below smaller diameter valve DN300 is less than 2 seconds, and below DN700 is less than 3 seconds.
As adopted butterfly valve, then there are the following problems: because in-furnace temperature is higher, according to soft seal, also do not have such material at present, then can only seal with hard.But hard sealing can not use on long term frequent ground.
Although adopt three eccentricity hard seal butterfly valve to solve the problem, but also there is another problem in all butterfly valves simultaneously, that is exactly a large amount of tar in heating gas, this thing can flow when high temperature, but once temperature reduces, just become very hard thing, and it can be attached to butterfly valve flow to one side valve plate sealing surface on, make the butterfly valve sealed with valve plate side like this, once after using a period of time, there is closing not dead, a large amount of phenomenon of leaking in capital, so all can not meet the demands with various butterfly valves common in the market.
Selector valve has a best advantage, that is exactly it is tray type structure, and the soft seal that plane sealing, temperature are low, the hard sealing that temperature is high, effectively can cut off various high temperature low temp fuel, because it is plane sealing, so valve plate side attachment tar also can not affect sealing effect.But in sealing place of valve rod, because heating gas temperature is higher, Expanded graphite generally can be used as stuffing box packing.But a large amount of tar existed it can be adsorbed on equally on valve rod, when valve is in unlatching, closing process, tar marginally can enter graphite packing, and filler and air communicate, temperature is so not high, the tar entering filler can increase along with passing temporally and cool hardening, just seal action is lost once hardening, first filler place has coal gas and leaks, maintaining method after leaking only has and compresses into Yi Walk, filler after compression will to increase between it and valve rod frictional force, cylinder operation load is dosed.In the course of time, action is more and more slower, below the long-pending tar of valve rod institute more next many, until cylinder band is motionless and quit work.Thus have a strong impact on working life.
Model utility content
The purpose of this utility model provides a kind of cut-off valve for heating gas medium for above-mentioned deficiency, and the seal form of its valve body adopts disc type plane sealing structure, and valve rod is revolving structure.
A kind of cut-off valve for heating gas medium of the present invention takes following technological scheme to realize:
Cut-off valve for heating gas medium comprises valve body, valve plate, rotating shaft and a fourbar linkage, and fourbar linkage is arranged in valve body by rotating shaft, and valve plate is arranged on the connecting rod of fourbar linkage, and valve plate is parallel with body wall; Described fourbar linkage is double rocker mechanism.
The motion mode of described rotating shaft for rotating, and drives valve plate motion by the rotation of rotating shaft.
The motion mode of described valve plate is for rotating and straight line motion.
Described angle of swing is 90o.
Disc type plane sealing mode taked by the cut-off valve that the utility model is used for heating gas medium, valve plate can be 90o and rotate, rotating shaft only has rotation in the course of the work, not rectilinear movement, therefore rotating shaft is adhered to tar many again and also can not affect its motion, effectively solve valve plate and the sealing problem of valve body and the sealing problem of rotating shaft place, add valve working reliability and working life.
Accompanying drawing explanation
Below with reference to accompanying drawing, the invention will be further described:
Fig. 1 is the structural representation of the present invention for the cut-off valve of heating gas medium.
Fig. 2 is the A-A direction schematic diagram of Fig. 1.
Fig. 3 is the schematic diagram of fourbar linkage.
In figure: 1, valve body, 2, valve plate, 3, fourbar linkage, 4, rotating shaft.
Embodiment
With reference to accompanying drawing 1 ~ 3, a kind of cut-off valve for heating gas medium comprises valve body 1, valve plate 2, rotating shaft 4 and fourbar linkage 3, and fourbar linkage 3 is arranged in valve body 1 by rotating shaft 4, and valve plate 2 is arranged on the connecting rod of fourbar linkage 3, and valve plate 2 is parallel with valve body 1 sidewall; Described fourbar linkage 3 is double rocker mechanism.
The motion mode of described rotating shaft 4 for rotating, and drives valve plate 2 to move by the rotation of rotating shaft 4.
The motion mode of described valve plate 2 is for rotating and straight line motion.
Described angle of swing is 90o.
When valve is in opening state, namely when valve plate 2 is parallel with valve body 1 sidewall, valve plate 2 is horizontal, and under actuator drives, rotating shaft 4 is rotated, and drive fourbar linkage 3 to move, valve plate 2 is and then rotated, when valve plate 2 rotates to valve body 1 sealing surface parallel position, continues have a straight journey to valve body 1 direction to advance, make valve plate 2 and valve body 1 fit tightly the effect reaching plane sealing, now valve is cut-off is in closed condition.
When valve is in closed condition, when namely valve plate 2 and valve body 1 fit tightly, under actuator drives, rotating shaft 4 rotates backward, and drives fourbar linkage 3 to move, and makes valve plate 2 first after the segment distance that moves linearly away from valve body sealing surface direction, opposite spin, until valve is in opening state.
Claims (4)
1. for a cut-off valve for heating gas medium, it is characterized in that: comprise valve body, valve plate, rotating shaft and fourbar linkage, fourbar linkage is arranged in valve body by rotating shaft, and valve plate is arranged on the connecting rod of fourbar linkage, and valve plate is parallel with body wall; Described fourbar linkage is double rocker mechanism.
2. the cut-off valve for heating gas medium according to claim 1, is characterized in that: the motion mode of described rotating shaft for rotating, and drives valve plate motion by the rotation of rotating shaft.
3. the cut-off valve for heating gas medium according to claim 1, is characterized in that: the motion mode of described valve plate is for rotating and straight line motion.
4. the cut-off valve for heating gas medium according to claim 3, is characterized in that: described angle of swing is 90o.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520292309.2U CN204610884U (en) | 2015-05-08 | 2015-05-08 | A kind of cut-off valve for heating gas medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520292309.2U CN204610884U (en) | 2015-05-08 | 2015-05-08 | A kind of cut-off valve for heating gas medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204610884U true CN204610884U (en) | 2015-09-02 |
Family
ID=53963452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520292309.2U Expired - Fee Related CN204610884U (en) | 2015-05-08 | 2015-05-08 | A kind of cut-off valve for heating gas medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204610884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998083A (en) * | 2020-09-08 | 2020-11-27 | 凯斯通环保设备有限公司 | Oval split sealed valve |
-
2015
- 2015-05-08 CN CN201520292309.2U patent/CN204610884U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998083A (en) * | 2020-09-08 | 2020-11-27 | 凯斯通环保设备有限公司 | Oval split sealed valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20200508 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |