CN101776191B - Construction method of joint seal of flanges of large-sized gas pipeline of blast furnace - Google Patents
Construction method of joint seal of flanges of large-sized gas pipeline of blast furnace Download PDFInfo
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- CN101776191B CN101776191B CN201010118953XA CN201010118953A CN101776191B CN 101776191 B CN101776191 B CN 101776191B CN 201010118953X A CN201010118953X A CN 201010118953XA CN 201010118953 A CN201010118953 A CN 201010118953A CN 101776191 B CN101776191 B CN 101776191B
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- gas pipeline
- flanges
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Abstract
The invention relates to a construction method of the joint seal of flanges of a large-sized gas pipeline of a blast furnace, comprising the following concrete steps of: processing a steel sleeve; soaking graphite packings by using wear-resisting hydraulic oil; arranging the soaked graphite packings on one surface of the steel sleeve by three rounds and then binding and fixing; carrying out oblique angle lapping on joint parts of the graphite packings and binding and fixing to finish the binding work of the graphite packings of the other surface of the steel sleeve; then binding and fixing to finish packing manufacture; cleaning impurities on the surfaces of flanges, brushing the wear-resisting hydraulic oil; arranging the packings between the flanges; accurately positioning and then screwing down with a bolt; and brushing the wear-resisting hydraulic oil. The invention is successfully applied in the construction of a plurality of gas pipelines of blast furnaces, well solves the hidden trouble of leakage of the large-sized gas pipeline, basically eliminates the leakage of the gas pipeline, reduces the rework and repair loss, saves a large amount of manual labour and material resources and greatly improves the construction efficiency of the gas pipeline.
Description
Technical field
The present invention relates to a kind of method of construction of joint seal of flanges of large-sized gas pipeline of blast furnace.
Background technique
In metallurgy high furnace ironmaking engineering construction, the construction of large-sized gas pipeline is very general, and in the gas pipe line construction flange to install be the controlling unit of a key, can it be directly connected to whether safety and the ironmaking equipment problem that run well of coal gas system.In the gas pipe line flange is installed, usually adopt asbestos washer, asbestos rope or rubber ring and other material seal to connect, but particular surroundings for the blast furnace system High Temperature High Pressure, and the bigger characteristics of gas pipe line diameter, the sealing effect of above conventional installation method is often unsatisfactory, stayed hidden danger for the blast furnace gas delivery safety, cause blast furnace to stop production easily and do over again, reprocess.So the installation of large-sized gas pipeline flange seal is a persistent ailment in the construction, does not have good solution for a long time always.
Summary of the invention
The objective of the invention is at above-mentioned present situation, aim to provide and a kind ofly can guarantee the flange seal effect, the basic gas pipeline leakage of eliminating, reducing does over again reprocesses loss, has saved the method for construction of the joint seal of flanges of large-sized gas pipeline of blast furnace of great amount of manpower and material resources.
The implementation of the object of the invention is, the method for construction of joint seal of flanges of large-sized gas pipeline of blast furnace, and concrete steps are as follows:
1) processing and fabricating Steel Sleeve, Steel Sleeve inner and outer rings radius between flange construction bolt hole and internal diameter,
2) packing is made
1. the graphite packing that will install is in advance put into the wearable hydraulic oil drum and is soaked, and the graphite packing needs complete immersion in anti-wear hydraulic oil,
2. the horizontal positioned Steel Sleeve discharges three circles with soaked graphite packing 2 on the one side of Steel Sleeve 1, be fixed on the Steel Sleeve with the cotton thread colligation every one section,
3. graphite packing joint area is cut into 30 ° of oblique angle overlap joints, and three circle packing joints are distributed on 120 ° of five equilibrium radians of circumference, and the joint uses the cotton thread colligation on Steel Sleeve,
4. again graphite packing and Steel Sleeve are fastened with line,
5. same method is finished the graphite packing at the another side of Steel Sleeve and is tied up the work of twining,
6. after the two sides all is fastened and finishes, fix with the line colligation once more, so far packing completes,
3) packing is installed
1. the packing of making is kept flat, the row of beaing is real,
2. clean the flange surface irregularities, brush anti-wear hydraulic oil again one time,
3. the packing of making is sling and is put between the flange, accurately behind the location, flange bolt is penetrated and tightens,
4. on packing, brush hydraulic oil, and allow the abundant immersion oil of packing expand.
The present invention is successful Application in a plurality of blast furnace system gas pipe line constructions, the fine hidden danger that has solved the large-sized gas pipeline leakage is eliminated gas pipeline leakage substantially, and having reduced does over again reprocesses loss, save great amount of manpower and material resources, improved the construction efficiency of gas pipe line greatly.
Description of drawings
Fig. 1 is a flange arrangement schematic representation of the present invention,
Fig. 2 is the Steel Sleeve structural representation,
Fig. 3 is phase diagram after the packing colligation,
Fig. 4 be the A-A of Fig. 3 to sectional view,
Fig. 5 is packing jointing phase diagram on Steel Sleeve.
Embodiment
The present invention is described in detail in detail with reference to the accompanying drawings.Concrete steps are:
1) according to the sectional dimension of mounting flange, processing and fabricating Steel Sleeve 1 (see figure 2) is controlled Steel Sleeve inner and outer rings radius (see figure 1) between flange bolt hole 5 apothem R and flange 6 internal diameter r, and the smoothing Steel Sleeve is also removed all burrs etc.
2) packing is made
1. the graphite packing 2 that will install is in advance put into the bucket that fills the 32# anti-wear hydraulic oil and is soaked, and guarantees that the graphite packing needs complete immersion in anti-wear hydraulic oil,
2. the horizontal positioned Steel Sleeve discharges three circles with soaked graphite packing 2 on the one side of Steel Sleeve 1, is fixed on (see figure 4) on the Steel Sleeve every 300mm with cotton thread 3 colligations,
3. graphite packing joint area is cut into 30 ° of oblique angle overlap joint (see figure 5)s, and three circle graphite packing joints are distributed on 120 ° of five equilibrium radians of circumference, and the joint uses cotton thread 3 colligations on Steel Sleeve,
4. after the colligation of single face graphite packing finishes, graphite packing and Steel Sleeve are fastened with cotton thread, twining spacing is about 20mm;
5. same method is finished the graphite packing at the another side of Steel Sleeve and is tied up the work of twining;
6. after graphite packing in two sides all was fastened and finishes, whole packing was fixed with cotton thread 3 colligations once more every 400mm, and so far packing working process is finished substantially.
3) packing is installed
1. the packing (see figure 3) of making is kept flat, the row of beaing is real gently with wooden mallet,
2. with perching knife, screw-driver the flange surface foreign material are rooted out totally, and are cleaned, brush anti-wear hydraulic oil again one time with kerosene,
3. the packing of making is sling and is put between the flange, accurately behind the location, flange bolt is penetrated and free-hand tightening,
4. distribute according to 90 degree orientation, bolt is tightened,, can utilize electric wrench symmetrical bolton as the condition permission by the four-player symmetry, guaranteeing each bolton power unanimity,
5. same method is tightened other bolt, till can't tightening again,
6. on packing, brush hydraulic oil 3 times with row brush, each about 5 minutes at interval, allow the abundant immersion oil of packing expand, to increase tension force, guarantee the flange seal effect.
Claims (5)
1. the method for construction of joint seal of flanges of large-sized gas pipeline of blast furnace is characterized in that concrete steps are as follows:
1) processing and fabricating Steel Sleeve, Steel Sleeve inner and outer rings radius between flange bolt hole apothem and flange internal diameter,
2) packing is made
1. the graphite packing that will install is in advance put into the wearable hydraulic oil drum and is soaked, and the graphite packing needs complete immersion in anti-wear hydraulic oil,
2. the horizontal positioned Steel Sleeve discharges three circles with soaked graphite packing on the one side of Steel Sleeve, be fixed on the Steel Sleeve with the cotton thread colligation every one section,
3. graphite packing joint area is cut into 30 ° of angle overlap joints, and three circle graphite packing joints are distributed on 120 ° of five equilibrium circular arcs of circumference, and the joint uses the cotton thread colligation on Steel Sleeve,
4. again graphite packing and Steel Sleeve are fastened with line,
5. same method is finished the graphite packing at the another side of Steel Sleeve and is tied up the work of twining,
6. after the two sides all is fastened and finishes, fix with the cotton thread colligation once more, so far packing completes,
3) packing is installed
1. the packing of making is kept flat, the row of beaing is real,
2. clean the flange surface irregularities, brush anti-wear hydraulic oil again one time,
3. the packing of making is sling and is put between the flange, accurately behind the location, flange bolt is penetrated and tightens,
4. on packing, brush anti-wear hydraulic oil, and allow the abundant immersion oil of packing expand.
2. the method for construction of joint seal of flanges of large-sized gas pipeline of blast furnace according to claim 1 is characterized in that in step 2) be fixed on the Steel Sleeve with the cotton thread colligation every 300mm in 2..
3. the method for construction of joint seal of flanges of large-sized gas pipeline of blast furnace according to claim 1 is characterized in that in step 2) 4. in graphite packing circle and Steel Sleeve be fastened with cotton thread, the winding spacing is 20mm.
4. the method for construction of joint seal of flanges of large-sized gas pipeline of blast furnace according to claim 1 is characterized in that in step 2) 6. in whole packing fix with the cotton thread colligation once more every 400mm.
5. the method for construction of joint seal of flanges of large-sized gas pipeline of blast furnace according to claim 1 is characterized in that brushing hydraulic oil 3 times with row brush on packing, each interval 5 minutes in step 3) in 4..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010118953XA CN101776191B (en) | 2010-03-04 | 2010-03-04 | Construction method of joint seal of flanges of large-sized gas pipeline of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010118953XA CN101776191B (en) | 2010-03-04 | 2010-03-04 | Construction method of joint seal of flanges of large-sized gas pipeline of blast furnace |
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| CN101776191A CN101776191A (en) | 2010-07-14 |
| CN101776191B true CN101776191B (en) | 2011-09-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2551473A1 (en) * | 2011-07-27 | 2013-01-30 | Alstom Technology Ltd | Device for the mutual fixation of two gas turbine casing components |
| CN102634616A (en) * | 2012-04-26 | 2012-08-15 | 中国十七冶集团有限公司 | Blast furnace top flange jackscrew aligning method |
| CN104295827B (en) * | 2013-07-17 | 2016-12-28 | 五冶集团上海有限公司 | Heavy caliber gas pipeline anti-leak packing ring and using method |
| CN106287102B (en) * | 2016-10-11 | 2018-11-02 | 北京首钢股份有限公司 | A kind of ring flange connecting portion leakage repair method |
| CN109210270B (en) * | 2017-07-01 | 2020-04-21 | 上海威纳工程技术有限公司 | Pressure precise control type packing installation method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5938246A (en) * | 1997-02-10 | 1999-08-17 | Wallace; Thomas C. | Increased pressure fluid carrying pipeline system and method therefor |
| CN201103357Y (en) * | 2007-02-09 | 2008-08-20 | 宝鸡石油机械有限责任公司 | Packing and sealing device for oil-well rig water tap washing pipe |
| CN201293162Y (en) * | 2008-11-17 | 2009-08-19 | 鞍钢股份有限公司 | Grommet structure for preventing benzene washing tower flange from leaking |
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