CN102401186A - Filler pre-tightening structure of three-eccentric cut-off butterfly valve of blast furnace - Google Patents
Filler pre-tightening structure of three-eccentric cut-off butterfly valve of blast furnace Download PDFInfo
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- CN102401186A CN102401186A CN2011101973705A CN201110197370A CN102401186A CN 102401186 A CN102401186 A CN 102401186A CN 2011101973705 A CN2011101973705 A CN 2011101973705A CN 201110197370 A CN201110197370 A CN 201110197370A CN 102401186 A CN102401186 A CN 102401186A
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- filler
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- valve
- butterfly valve
- blast furnace
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Abstract
The invention discloses a filler pre-tightening structure of a three-eccentric cut-off butterfly valve of a blast furnace. The filler pre-tightening structure is positioned between an inner hole of a valve body and a valve rod, wherein a nano-plating and self-lubricating shaft sleeve, a lubricating ring, filler and a pressing sleeve are sequentially arranged between the inner hole of the valve body and the valve rod; a belleville spring is arranged on a step of the pressing sleeve; and the belleville spring is pressed by a pressure plate and the pressing plate is connected with the valve body through a fastener. According to the filler pre-tightening structure of the three-eccentric cut-off butterfly valve, the pressure to the pressing plate is formed by using a pre-tightening force generated by the fastener; and the pressure is acted on sealing filler made of a flexible graphite and carbon fiber composite material through the pressing plate, the belleville spring and the pressing sleeve, and thereby gas at the extending end of the valve rod is sealed. When the elasticity of the filler is weakened or the fastener has a trend of loosening due to the influence from work conditions, elastic potential energy stored by the belleville spring is released, so that the continuous pressure for the sealing filler is maintained and the loosening of the fastener is prevented. The filler pre-tightening structure of the three-eccentric cut-off butterfly valve has the advantages of safety, reliability, maintenance freedom, compact structure and the like; and the maintenance difficulty of the cut-off butterfly valve for a low-temperature medium in a blast-furnace iron-making system is reduced.
Description
Technical field
The present invention relates to the three eccentric cut-off valves that a kind of blast furnace process is used, especially a kind of blast furnace three eccentric filler pre-pressing structures that cut off butterfly valve.
Background technique
The blast furnace three eccentric butterfly valve is applicable on the medium pipelines such as blast furnace air, coal gas, combustible gas, the cut-off valve of doing commonly used.It is little that this type of cut-off valve has a volume, lightweight characteristics.But the blast furnace three eccentric butterfly valve of existing technology is in real work; Valve rod two ends leakage problem often appears; Traditional sealing structure of shaft end is: Gland compresses graphite establishment filler through double-screw bolt, nut and realizes sealing; Use after a period of time often because of filler elasticity weakens, cause sealability to reduce and leak gas, cause a hidden trouble for the ordinary production of blast furnace, staff's personal safety.Develop for this reason and a kind ofly can compensate that filler elasticity weakens, non-maintaining elastic filler pre-pressing structure is very necessary.
Summary of the invention
In order to solve the existing three eccentric above-mentioned technical problems of cutting off the existence of butterfly valve conventional filler gland compressing structure, the spy provides a kind of can guarantee normal smelting operation, the blast furnace three eccentric butterfly valve filler pre-pressing structures that cut off that maintenance cost is low.
The technological scheme that the present invention adopted is:
These blast furnace three eccentric butterfly valve filler pre-pressing structures that cut off; Between valve body inner bore and valve rod; Between said valve body inner bore and valve rod, pack into successively axle sleeve, drip ring, filler, gland; On the gland step, place butterfly spring, adopt fastening piece that pressing plate is compressed butterfly spring, and pressing plate is connected with valve body.
Said filler material is that Expanded graphite adds carbon fiber composite.
Said filler is divided in the both sides of drip ring.
Said axle sleeve is that nanometer is electroplated self lubrication bearing.
The eccentric butterfly valve filler pre-pressing structures that cut off of blast furnace three, the pretightening force that produces through fastening piece forms pressure to pressing plate, pressure through pressing plate, butterfly spring, gland, act in the stuffing box packing, thereby to the gas seal at valve rod external part place.When the influence that receives operating mode, stuffing box packing elasticity weakens or fastening piece when loosening trend is arranged, and the elastic potential energy that butterfly spring is stored discharges, and has kept the lasting pressure to stuffing box packing, has stoped the loosening of fastening piece.
These blast furnace three eccentric butterfly valve filler pre-pressing structures that cut off have advantages such as safe and reliable, non-maintaining, compact structure, have alleviated the maintenance difficulties of cryogenic media cut-out butterfly valve in the system for blast furnace ironmaking.
Description of drawings
Fig. 1 is the blast furnace three eccentric schematic representation that cut off butterfly valve and filler pre-pressing structure thereof;
Fig. 2 is the blast furnace three eccentric butterfly valve filler pre-pressing structure I portion enlarged diagrams that cut off.
Embodiment
Further introduce embodiments of the invention below in conjunction with accompanying drawing:
Shown in Figure 1, these blast furnace three eccentric butterfly valve filler pre-pressing structures that cut off are arranged on blast furnace three eccentric valve body 6 one end valve bars 7 extended positions that cut off butterfly valve.
Shown in Figure 2, this blast furnace three is eccentric to cut off butterfly valve filler pre-pressing structures and mainly is made up of stuffing box packing 4, double-screw bolt and nut combinations fastening piece 5, valve body 6, valve rod 7, axle sleeve 8, the drip ring 9 that gland 1, pressing plate 2, butterfly spring 3, Expanded graphite add the graphite fiber composite.The nanometer of packing into successively between valve body 6 endoporus and the valve rod 7 is electroplated self lubrication bearing 8, drip ring 9, filler 4, gland 1, and diagram is that filler 4 is placed on drip ring 9 both sides respectively, can make filler obtain sufficient lubrication.On gland 1 step, place standard piece butterfly spring 3, adopt double-screw bolt and nut combinations fastening piece 5 that pressing plate 2 is compressed butterfly spring 3, and pressing plate 2 is connected with valve body 6.Can form pressure to pressing plate 2 through tightening nut, pressure is through pressing plate 2, and butterfly spring 3, gland 1 act in the stuffing box packing 4, and 4 pairs of valve rod 7 external parts of stuffing box packing seal, and prevent that gas from escaping from valve rod.When the influence that receives operating mode, stuffing box packing 4 elasticity weaken or fastening piece 5 when loosening trend is arranged, and the elastic potential energy that butterfly spring 3 is stored discharges, and has kept the lasting pressure to stuffing box packing 4, has stoped the loosening of fastening piece 5.
Claims (5)
1. blast furnace three off-centre are cut off butterfly valve filler pre-pressing structures; It is characterized in that: this butterfly spring filler pre-pressing structure places between valve body inner bore and the valve rod; Between said valve body inner bore and valve rod, pack into successively axle sleeve, drip ring, filler, gland; On the gland step, place butterfly spring, adopt fastening piece that pressing plate is compressed butterfly spring, and pressing plate is connected with valve body.
2. the blast furnace three eccentric butterfly valve filler pre-pressing structures that cut off according to claim 1, it is characterized in that: said filler material is that Expanded graphite adds carbon fiber composite.
3. the blast furnace three eccentric butterfly valve filler pre-pressing structures that cut off according to claim 2, it is characterized in that: said filler is divided in the both sides of drip ring.
4. the blast furnace three eccentric butterfly valve filler pre-pressing structures that cut off according to claim 1, it is characterized in that: said axle sleeve is that nanometer is electroplated self lubrication bearing.
5. the blast furnace three eccentric butterfly valve filler pre-pressing structures that cut off according to claim 1, it is characterized in that: said fastening piece is bolt, nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101973705A CN102401186A (en) | 2011-07-14 | 2011-07-14 | Filler pre-tightening structure of three-eccentric cut-off butterfly valve of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101973705A CN102401186A (en) | 2011-07-14 | 2011-07-14 | Filler pre-tightening structure of three-eccentric cut-off butterfly valve of blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102401186A true CN102401186A (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101973705A Pending CN102401186A (en) | 2011-07-14 | 2011-07-14 | Filler pre-tightening structure of three-eccentric cut-off butterfly valve of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102401186A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782558A (en) * | 2016-05-06 | 2016-07-20 | 上海沪航阀门有限公司 | Multiple and double-layer sealing packing gland device and using method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209501A (en) * | 1990-02-05 | 1993-05-11 | Itw Limited | Needle packing assembly |
| US5230498A (en) * | 1990-10-09 | 1993-07-27 | Fisher Controls International, Inc. | Live load packing system |
| US5542681A (en) * | 1990-12-21 | 1996-08-06 | Fisher Controls International, Inc. | Graphite packing |
| CN2583455Y (en) * | 2002-12-04 | 2003-10-29 | 上海化工研究院 | High temp. high pressure sealing device |
| CN2886246Y (en) * | 2005-12-23 | 2007-04-04 | 王建敏 | Discharge ball valve without dead angle |
| CN2893339Y (en) * | 2006-04-20 | 2007-04-25 | 湖北洪城通用机械股份有限公司 | Electric vacuum valve |
| CN201129480Y (en) * | 2007-12-18 | 2008-10-08 | 中核苏阀科技实业股份有限公司 | Super high temperature flue gas butterfly valve |
| CN201330887Y (en) * | 2009-01-09 | 2009-10-21 | 上海一核阀门制造有限公司 | Filler sealing structure of small-diameter valve |
| CN102022561A (en) * | 2009-09-10 | 2011-04-20 | 江南阀门有限公司 | Depressurization-type metallic seal ball valve |
| CN201810868U (en) * | 2010-09-26 | 2011-04-27 | 上海阀特流体控制阀门有限公司 | Packing sealing structure of valve |
-
2011
- 2011-07-14 CN CN2011101973705A patent/CN102401186A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209501A (en) * | 1990-02-05 | 1993-05-11 | Itw Limited | Needle packing assembly |
| US5230498A (en) * | 1990-10-09 | 1993-07-27 | Fisher Controls International, Inc. | Live load packing system |
| US5542681A (en) * | 1990-12-21 | 1996-08-06 | Fisher Controls International, Inc. | Graphite packing |
| CN2583455Y (en) * | 2002-12-04 | 2003-10-29 | 上海化工研究院 | High temp. high pressure sealing device |
| CN2886246Y (en) * | 2005-12-23 | 2007-04-04 | 王建敏 | Discharge ball valve without dead angle |
| CN2893339Y (en) * | 2006-04-20 | 2007-04-25 | 湖北洪城通用机械股份有限公司 | Electric vacuum valve |
| CN201129480Y (en) * | 2007-12-18 | 2008-10-08 | 中核苏阀科技实业股份有限公司 | Super high temperature flue gas butterfly valve |
| CN201330887Y (en) * | 2009-01-09 | 2009-10-21 | 上海一核阀门制造有限公司 | Filler sealing structure of small-diameter valve |
| CN102022561A (en) * | 2009-09-10 | 2011-04-20 | 江南阀门有限公司 | Depressurization-type metallic seal ball valve |
| CN201810868U (en) * | 2010-09-26 | 2011-04-27 | 上海阀特流体控制阀门有限公司 | Packing sealing structure of valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782558A (en) * | 2016-05-06 | 2016-07-20 | 上海沪航阀门有限公司 | Multiple and double-layer sealing packing gland device and using method |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20120404 |