CN201992136U - Bypass valve for isolating bypass pipeline by air seal method - Google Patents
Bypass valve for isolating bypass pipeline by air seal method Download PDFInfo
- Publication number
- CN201992136U CN201992136U CN2011200297293U CN201120029729U CN201992136U CN 201992136 U CN201992136 U CN 201992136U CN 2011200297293 U CN2011200297293 U CN 2011200297293U CN 201120029729 U CN201120029729 U CN 201120029729U CN 201992136 U CN201992136 U CN 201992136U
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- valve
- bypass
- butterfly
- butterfly valve
- pipe
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Abstract
The utility model relates to a bypass valve for isolating a bypass pipeline by an air seal method, which comprises a valve body, wherein the valve body comprises a three-way pipe, and butterfly valves are arranged in three nozzles of the valve body; and two of the nozzles are connected with a dust catcher bypass pipe, and another nozzle is communicated with atmosphere. The butterfly valves are centrally sealed butterfly valves, and the two ends of a butterfly valve shaft of each butterfly valve are arranged on the valve body by high-temperature bearings. When the bypass valve is normally opened, two butterfly valve plates in the bypass pipe are simultaneously opened, and then the butterfly valve plate communicated with the atmosphere is closed, so that a bypass system normally passes. When the bypass pipeline is required to be closed, the two butterfly valve plates in the bypass pipe are closed, and then the butterfly valve plate communicated with the atmosphere is slightly opened, accordingly, a draft runs to the two sides of the bypass pipe due to the difference between positive and negative pressure, and the positive pressure formed in a valve cavity thoroughly isolates the circulation of air flow in the bypass pipe, thereby the sealing effect of air seal is realized, and 100% sealing can be realized.
Description
[technical field]
The utility model relates to a kind of by-pass valve that adopts the sealing gland mode to isolate bypass duct.
[background technique]
In the removing dust project system; often adopt bypass protection; main purpose is under original state of deduster (bag dedusting or electric precipitation) (initial or close) or the running state, does not influence the ordinary production of process system and takes a kind of measure of isolating the pipeline flue, as shown in Figure 1.Bypass protection is exactly to establish by-pass valve on the import and export flue of sack cleaner.When the cigarette temperature surpasses the temperature range that filter bag can bear, or filter bag pressure reduction is greater than setting value and when can not falling, and by-pass valve is opened automatically, and the terminal valve of sack cleaner is closed, and flue gas directly is discharged to chimney through induced draught fan.By-pass valve has two kinds of built-in and externals.
Continuous strictness along with the national environmental protection emission request, some place almost requires to reach zero-emission, and general dust pelletizing system is provided with bypath system again because of technological requirement, especially under the flue gas working condition of big air quantity, high concentration, high temperature, as power plant, the cement plant, steel mill to the requirement of by-pass valve is: the one, enable and want flexibly, the 2nd, want tight when closing.And these two requirements itself are contradiction.The machinery by-pass valve is in a large amount of practical applications, tend to produce two extreme: one extremely to be that by-pass valve opens valve flexible, but leakproofness is not enough, and by-pass valve tightly is very important: because as long as by-pass valve is a little revealed, will directly influence effluent concentration, and how long not need, the sealing surface of by-pass valve can seriously blow damage, revealing obviously increases, and discharging exceeds standard, suction fan heavy wear and damaging.Another extremely is that the by-pass valve leakproofness is fine, opens inconvenience but can produce, and occurs the situation that fits badly or do not open sometimes, and causing a lot of engineering systems simply thoroughly to be shut need not.
In sum, the existing machinery by-pass valve is difficult to reach the ideal operation state for opening valve balance well flexibly and between the leakproofness.
[model utility content]
Technical problem to be solved in the utility model is to provide a kind of differential pressure of the positive negative pressure of system of utilizing that flue gas in the flue is isolated to reach the by-pass valve of bypass duct leakproofness, the flexibility that has guaranteed to open valve again simultaneously.
The technical solution of the utility model is: a kind of by-pass valve that adopts the sealing gland mode to isolate bypass duct, comprise valve body, described valve body comprises a three-way pipe, in three mouths of pipe of described valve body butterfly valve is housed all, wherein two described mouths of pipe are connected with the deduster bypass tube, and another described mouth of pipe is communicated with atmosphere.
As the further improvement of such scheme, described butterfly valve is the central seal butterfly valve, and its butterfly valve axle two ends are installed on the described valve body with high-temperature bearing.
As the further improvement of such scheme, the valve rod of described butterfly valve connects with cylinder piston rod, to control its corresponding butterfly valve plate direction.
Principle of the present utility model is: butterfly valve is to make open-shut device and rotate a kind of valve of opening, cutting out with the regulated fluid passage with the butterfly valve bar with circular butterfly valve plate.The butterfly valve plate is installed on the diametric(al) of pipeline.In the butterfly valve body cylindrical channel, the butterfly valve plate is around the rotation of butterfly valve rod axis, and angle of swing is between 0 °-90 °, and when rotating to 90 °, valve then is a full-gear.When by-pass valve is normally opened, two butterfly valve plates in the by-pass pipe are opened simultaneously, more open to atmosphere butterfly valve plate is closed, bypath system will normally be passed through.In the time will closing bypass duct, two butterfly valve plates in the by-pass pipe are closed, open logical big gas butterfly valve plate a little, because the pressure reduction of inside and outside positive negative pressure, draft runs toward the both sides by-pass pipe, the malleation that forms in the valve cavity has just thoroughly been isolated the circulation of air-flow in the by-pass pipe, thereby reaches the sealing effect of sealing gland, and can reach 100% and do not leak.
Advantage of the present utility model is: this product is mainly used in the flue gas dust collecting system of big air quantity, high temperature, high concentration, owing to adopt the sealing gland form, is not very high to mechanical seal requirement, can enable flexibly, can reach the requirement of thorough sealing again.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the mounting point schematic representation of by-pass valve,
Fig. 2 is a plan view of the present utility model,
Fundamental diagram when Fig. 3 normally opens for by-pass valve,
Fig. 4 is the fundamental diagram when closing bypass duct.
[embodiment]
Referring to Fig. 2,3, a kind of by-pass valve that adopts the sealing gland mode to isolate bypass duct, comprise valve body 1, valve body 1 comprises a three-way pipe, butterfly valve 4a, 4b, 4c all are equipped with in three mouth of pipe places of valve body 1, wherein two mouths of pipe that butterfly valve 4a, 4b are housed are connected with the deduster bypass tube, and another mouth of pipe that butterfly valve 4c is housed is communicated with atmosphere.
The driving mode of butterfly valve 4a, 4b, 4c all adopts the air cylinder driven mode, and butterfly valve bar 2a, 2b, 2c connect with the piston rod of cylinder 5a, 5b, 5c, with the valve plate direction of control butterfly valve 4a, 4b, 4c.Valve rod 2a, 2b, 2c only rotated and do not do the lifting operation when butterfly valve opened and closed.The size of cylinder 5a, 5b, 5c is according to air current flow, and air velocity duct comes fixed, and general pipeline wind speed is the 16-18 meter per second.
By system's control requirement, it mainly is to open or close by electromagnetic valve cylinder 5a, 5b, 5c that the switching of valve starts, when by-pass valve is normally opened, butterfly valve 4a, 4b are opened simultaneously, open to atmosphere butterfly valve 4c is closed, bypath system will normally be passed through, as shown in Figure 3 again.
In the time will closing bypass duct, piston rod movement with solenoid valve control cylinder 5a, 5b, the butterfly valve plate of butterfly valve 4a, 4b is closed, open a little a bit with the valve plate of cylinder 5c promotion butterfly valve 4c simultaneously, because the pressure reduction of inside and outside positive negative pressure, draft goes back and forth between two places toward by-pass pipe, in valve cavity, form malleation, thoroughly isolated the circulation of air-flow in the by-pass pipe, thereby reach the sealing effect of sealing gland, and can reach 100% and not leak, as shown in Figure 4.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiments, scope of the present utility model is limited by claims and equivalent thereof.
Claims (3)
1. by-pass valve that adopts the sealing gland mode to isolate bypass duct, comprise valve body, it is characterized in that: described valve body comprises a three-way pipe, in three mouths of pipe of described valve body butterfly valve is housed all, wherein two described mouths of pipe are connected with the deduster bypass tube, and another described mouth of pipe is communicated with atmosphere.
2. according to the described a kind of by-pass valve that adopts the sealing gland mode to isolate bypass duct of claim 1, it is characterized in that: described butterfly valve is the central seal butterfly valve, and its butterfly valve axle two ends are installed on the described valve body with high-temperature bearing.
3. according to the described a kind of by-pass valve that adopts the sealing gland mode to isolate bypass duct of claim 1, it is characterized in that: the valve rod of described butterfly valve connects with cylinder piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200297293U CN201992136U (en) | 2011-01-28 | 2011-01-28 | Bypass valve for isolating bypass pipeline by air seal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200297293U CN201992136U (en) | 2011-01-28 | 2011-01-28 | Bypass valve for isolating bypass pipeline by air seal method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201992136U true CN201992136U (en) | 2011-09-28 |
Family
ID=44668626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200297293U Expired - Fee Related CN201992136U (en) | 2011-01-28 | 2011-01-28 | Bypass valve for isolating bypass pipeline by air seal method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201992136U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913086A (en) * | 2015-06-08 | 2015-09-16 | 洛阳明远石化技术有限公司 | Flue gas pipeline system and gas seal valve |
| CN107529595A (en) * | 2016-12-29 | 2018-01-02 | 大唐环境产业集团股份有限公司 | A kind of annular groove malleation sealing gland bypass valve |
| CN110131430A (en) * | 2019-05-14 | 2019-08-16 | 张思汉 | Thermal type automatic temperature-control water mixing valve |
| CN111928278A (en) * | 2020-07-31 | 2020-11-13 | 中国石化北海炼化有限责任公司 | Claus tail gas treatment device |
-
2011
- 2011-01-28 CN CN2011200297293U patent/CN201992136U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913086A (en) * | 2015-06-08 | 2015-09-16 | 洛阳明远石化技术有限公司 | Flue gas pipeline system and gas seal valve |
| CN107529595A (en) * | 2016-12-29 | 2018-01-02 | 大唐环境产业集团股份有限公司 | A kind of annular groove malleation sealing gland bypass valve |
| CN110131430A (en) * | 2019-05-14 | 2019-08-16 | 张思汉 | Thermal type automatic temperature-control water mixing valve |
| CN111928278A (en) * | 2020-07-31 | 2020-11-13 | 中国石化北海炼化有限责任公司 | Claus tail gas treatment device |
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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: 20110928 Termination date: 20160128 |
|
| EXPY | Termination of patent right or utility model |