CN103954134A - Overhaul technique for online replacement of furnace bottom roller of heat treatment furnace - Google Patents
Overhaul technique for online replacement of furnace bottom roller of heat treatment furnace Download PDFInfo
- Publication number
- CN103954134A CN103954134A CN201410125279.6A CN201410125279A CN103954134A CN 103954134 A CN103954134 A CN 103954134A CN 201410125279 A CN201410125279 A CN 201410125279A CN 103954134 A CN103954134 A CN 103954134A
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- hearth roll
- hearth
- connecting rod
- roll
- drive end
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
Abstract
The invention discloses an overhaul technique for online replacement of a furnace bottom roller of a heat treatment furnace and belongs to the technical field of overhauling methods of heat treatment furnaces in the metallurgical industry. The overhauling technique is used for online replacement of the furnace bottom roller. The technical scheme provided by the invention is that a connecting rod and a balancing weight are adopted in the overhauling technique; two ends of the connecting rod are connected with a broken roller and the balancing weight to form a whole; the middle part of the connecting rod is hung by using an overhead traveling crane; the broken roller is moved out of a hearth; a new furnace bottom roller is connected with the connecting rod and the balancing weight and then is hung into the hearth for mounting. According to the overhaul technique for the online replacement of the furnace bottom roller, which is disclosed by the invention, online replacement of single furnace bottom roller can be realized; the mode that persons enter the furnace is avoided, the reduction of furnace temperature is greatly narrowed, energy source loss caused by shutdown for overhaul is avoided and the overhaul time is greatly shortened; meanwhile, the labor intensity of workers is reduced. According to the overhaul technique disclosed by the invention, the problem that the production is puzzled for a long time is solved; non-stopping overhaul technique for the online replacement of the furnace bottom roller is initiated in the industry, the influence of replacement of the furnace bottom roller on the production is reduced to the maximum extent and the yield of steel plates is ensured. The overhaul technique has the advantages of remarkable economic benefits and great popularization and use values.
Description
Technical field
The present invention relates to a kind of heat-treatment furnace and change online hearth roll maintenance craft, belong to metallurgical heat-treatment furnace repair method technical field.
Background technology
Heat treatment is the important step during steel are produced, and hearth roll is arranged at the bottom of the heat-treatment furnace that steel plate sheet material is heat-treated, and steel plate is along hearth roll operation in heat-treatment furnace, and heat-treatment furnace is when heating steel plate, and hearth roll is also heated simultaneously.In heat treatment process, hearth roll is due to factors such as expanded by heating, often the fault of producer bottom roller fracture.When more the or several hearth rolls of hearth roll fracture rupture continuously, steel plate is easily walked tiltedly or jam, can not normally pass through burner hearth, causes production to be obstructed.While running into this situation, generally adopt the mode of shutdown maintenance in the past.Shutdown maintenance is lowered the temperature 24 hours minimum used times, and in stove, temperature can be down to 50 ℃ of left and right, and maintainer must enter stove could change hearth roll, simultaneously the higher upkeep operation that is also unfavorable for of temperature in stove.In this case, change a plurality of hearth rolls and need used time 2-3 days, heat up and also want 24 hours used times, therefore each maintenance needs used time 4-5 days altogether, and standing time under repair is longer, affected carrying out continuously of producing, reduce steel plate output, affected the punctual delivery to client, simultaneously, the energy resource consumption of the thermal loss that blowing out causes and some stove also causes ton steel cost to rise, and the economic benefit of enterprise is caused to adverse effect.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of heat-treatment furnace and changes online hearth roll maintenance craft, adopt this maintenance craft not blowing out to change hearth roll, realization is carried out on-bne repair to single hearth roll, shorten the repair time, reduce to greatest extent and change hearth roll to the impact of producing.
The technical scheme solving the problems of the technologies described above is:
Heat-treatment furnace is changed a hearth roll maintenance craft online, and it adopts following steps to carry out:
A. in stove, temperature is down to 400 ℃-200 ℃, and furnace pressure is micro-negative pressure;
B. the hearth roll of needs being changed and two adjacent hearth rolls have a power failure;
C. remove the shaft coupling that need to change hearth roll, with hydraulic draw trochus, pull out the catcher of hearth roll drive end, remove the little gland of hearth roll drive end, remove hearth roll drive end lock sleeve stop nut;
D. remove the little gland of hearth roll Partner end cap, remove end cap set bolt, adopt two ends to have the connecting rod of axis hole, the axis hole of connecting rod one end and hearth roll Partner spindle nose match, axis hole is set on hearth roll Partner spindle nose, jackscrew holds out against, and in the axis hole of the other end of connecting rod, is set with counterweight, and the weight of counterweight and hearth roll matches;
E. with overhead traveling crane, hang the middle part of connecting rod, make the interior roll breakage of stove and counterweight reach balance, outwards mobile overhead crane, makes roll breakage in stove remove burner hearth, and jack jacking burner hearth for hearth roll drive end broken end, to there being the bearings at both ends of damage to change;
F. connecting rod and counterweight are installed to new hearth roll Partner, make new hearth roll and counterweight reach balance, with overhead traveling crane lifting connecting rod middle part, the new hearth roll of slinging, new hearth roll drive end is put in to burner hearth, and mobile overhead crane is installed in hearth roll drive end lock sleeve new hearth roll;
G. use the new hearth roll height of jack adjustment, resistance to material and hearth roll Partner end cap are installed;
H. recover hearth roll drive end locking nut, recover hearth roll drive end catcher, recover hearth roll shaft coupling, whole online replacing hearth roll process finishes.
Above-mentioned heat-treatment furnace is changed hearth roll maintenance craft online, and described counterweight is a disconnected roll breakage in velamen moved end, and by the shaft hole sleeve of the other end of connecting rod, on the drive end of roll breakage, jackscrew holds out against.
Usefulness of the present invention is:
The present invention adopts two ends to have the connecting rod of axis hole, and the two ends of connecting rod and roll breakage and counterweight are connected as one, and the middle part of slinging connecting rod with overhead traveling crane, shifts out burner hearth by roll breakage, then after new hearth roll is connected with counterweight with connecting rod, hangs in burner hearth and install.Replacing hearth roll maintenance craft of the present invention can be changed online to single hearth roll, personnel need not enter in stove, furnace temperature reduces amplitude and significantly reduces, the energy loss of having avoided shutdown maintenance to cause, greatly shortened the repair time, improve the operating environment of changing hearth roll simultaneously, reduced worker's labour intensity, there is very high practical value.The invention solves the problem that long-term puzzlement is produced, the online replacing hearth roll maintenance craft of pioneering not blowing out in the industry, reduces the impact of the production of changing hearth roll to greatest extent, has guaranteed steel plate output, there is significant economic benefit, have great popularizing value.
Accompanying drawing explanation
Fig. 1 is online replacing hearth roll maintenance craft schematic diagram of the present invention.
In figure, mark is as follows: burner hearth 1, hearth roll drive end broken end 2, hearth roll Partner broken end 3, connecting rod 4, counterweight 5.
The specific embodiment
The present invention adopts connecting rod 4 to adjust the balance of the interior roll breakage of burner hearth 1 and counterweight 5, realizes not blowing out, does not enter replacing hearth roll in stove.
Concrete steps of the present invention are as follows:
A. in stove, temperature is down to 400 ℃-200 ℃, and furnace pressure is micro-negative pressure;
B. the hearth roll of needs being changed and two adjacent hearth rolls have a power failure, and list, and tripartite confirms;
C. remove the shaft coupling that need to change hearth roll, with hydraulic draw trochus, pull out the catcher of hearth roll drive end, remove the little gland of hearth roll drive end, remove hearth roll drive end lock sleeve stop nut;
D. remove the little gland of hearth roll Partner end cap, remove end cap set bolt, adopt two ends to have the connecting rod 4 of axis hole, the axis hole of connecting rod 4 one end and hearth roll Partner spindle nose match, and axis hole is set on hearth roll Partner spindle nose, and jackscrew holds out against, prevent connecting rod 4 and hearth roll disengagement, with overhead traveling crane, hang a disconnected roll breakage in velamen moved end and do counterweight 5, be connected to the other end of connecting rod 4, jackscrew holds out against;
E. overhead traveling crane hangs the middle part of connecting rod 4, makes the interior roll breakage of stove and counterweight 5 reach balance, and outwards mobile overhead crane makes roll breakage in stove remove burner hearth 1, hearth roll drive end broken end 2 use jack jacking burner hearths 1, and bearings at both ends has changing of damage;
F. with overhead traveling crane, hang new hearth roll, new hearth roll drive end is put in to burner hearth 1, counterweight 5 and connecting rod 4 are installed to new hearth roll Partner, and lifting connecting rod 4 middle parts make new hearth roll and counterweight 5 reach balance, and mobile overhead crane is installed in hearth roll drive end lock sleeve new hearth roll;
G. use jack to adjust hearth roll height, resistance to material and hearth roll Partner end cap are installed;
H. recover hearth roll drive end locking nut, recover hearth roll drive end catcher, recover hearth roll shaft coupling, whole online replacing hearth roll process finishes.
Claims (2)
1. heat-treatment furnace is changed a hearth roll maintenance craft online, it is characterized in that: it adopts following steps to carry out:
A. in stove, temperature is down to 400 ℃-200 ℃, and furnace pressure is micro-negative pressure;
B. the hearth roll of needs being changed and two adjacent hearth rolls have a power failure;
C. remove the shaft coupling that need to change hearth roll, with hydraulic draw trochus, pull out the catcher of hearth roll drive end, remove the little gland of hearth roll drive end, remove hearth roll drive end lock sleeve stop nut;
D. remove the little gland of hearth roll Partner end cap, remove end cap set bolt, adopt two ends to have the connecting rod (4) of axis hole, axis hole and the hearth roll Partner spindle nose of connecting rod (4) one end match, axis hole is set on hearth roll Partner spindle nose, jackscrew holds out against, and is set with counterweight (5) in the axis hole of the other end of connecting rod (4), and counterweight (5) matches with the weight of hearth roll;
E. with overhead traveling crane, hang the middle part of connecting rod (4), make the interior roll breakage of stove and counterweight reach balance, outwards mobile overhead crane, makes roll breakage in stove remove burner hearth (1), jack jacking burner hearth (1) for hearth roll drive end broken end (2), to there being the bearings at both ends of damage to change;
F. connecting rod (4) and counterweight (5) are installed to new hearth roll Partner, make new hearth roll and counterweight (5) reach balance, with overhead traveling crane, lift by crane connecting rod (4) middle part, the new hearth roll of slinging, new hearth roll drive end is put in to burner hearth (1), and mobile overhead crane is installed in hearth roll drive end lock sleeve new hearth roll;
G. use the new hearth roll height of jack adjustment, resistance to material and hearth roll Partner end cap are installed;
H. recover hearth roll drive end locking nut, recover hearth roll drive end catcher, recover hearth roll shaft coupling, whole online replacing hearth roll process finishes.
2. heat-treatment furnace according to claim 1 is changed hearth roll maintenance craft online, it is characterized in that: described counterweight (5) is a disconnected roll breakage in velamen moved end, and by the shaft hole sleeve of the other end of connecting rod (4), on the drive end of roll breakage, jackscrew holds out against.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410125279.6A CN103954134A (en) | 2014-03-31 | 2014-03-31 | Overhaul technique for online replacement of furnace bottom roller of heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410125279.6A CN103954134A (en) | 2014-03-31 | 2014-03-31 | Overhaul technique for online replacement of furnace bottom roller of heat treatment furnace |
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| CN103954134A true CN103954134A (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410125279.6A Pending CN103954134A (en) | 2014-03-31 | 2014-03-31 | Overhaul technique for online replacement of furnace bottom roller of heat treatment furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282514A (en) * | 2016-08-17 | 2017-01-04 | 武汉钢铁股份有限公司 | Heat treatment furnace roller repairing and reusing method |
| CN110092296A (en) * | 2018-01-31 | 2019-08-06 | 上海二十冶建设有限公司 | Suspender and its application method for furnace roller lifting |
| US10464176B2 (en) | 2017-06-06 | 2019-11-05 | WTX Oil Fields Services, LLC | Fire tube installation and removal tool |
| CN115305337A (en) * | 2022-08-27 | 2022-11-08 | 湖南湘钢工程技术有限公司 | Process for replacing furnace roller of heat treatment furnace for medium and thick plates in steel mill in thermal state |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5729533A (en) * | 1980-06-18 | 1982-02-17 | Hoesch Estel Werke Ag | Conveyor roller for heating furnace |
| CN201209157Y (en) * | 2008-06-05 | 2009-03-18 | 武汉钢铁(集团)公司 | Adjustable balanced counterweight apparatus |
| CN101575665A (en) * | 2009-06-04 | 2009-11-11 | 重庆钢铁(集团)有限责任公司 | Roller-bottom type normalizing furnace bottom-roller changing method |
| CN102002569A (en) * | 2010-11-03 | 2011-04-06 | 中冶南方(武汉)威仕工业炉有限公司 | Method for changing roller outside roller hearth steel plate heat treatment furnace and device thereof |
| CN202508744U (en) * | 2011-12-19 | 2012-10-31 | 中国一冶集团有限公司 | Lifting appliance with movable balance weight |
-
2014
- 2014-03-31 CN CN201410125279.6A patent/CN103954134A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5729533A (en) * | 1980-06-18 | 1982-02-17 | Hoesch Estel Werke Ag | Conveyor roller for heating furnace |
| CN201209157Y (en) * | 2008-06-05 | 2009-03-18 | 武汉钢铁(集团)公司 | Adjustable balanced counterweight apparatus |
| CN101575665A (en) * | 2009-06-04 | 2009-11-11 | 重庆钢铁(集团)有限责任公司 | Roller-bottom type normalizing furnace bottom-roller changing method |
| CN102002569A (en) * | 2010-11-03 | 2011-04-06 | 中冶南方(武汉)威仕工业炉有限公司 | Method for changing roller outside roller hearth steel plate heat treatment furnace and device thereof |
| CN202508744U (en) * | 2011-12-19 | 2012-10-31 | 中国一冶集团有限公司 | Lifting appliance with movable balance weight |
Non-Patent Citations (1)
| Title |
|---|
| 张小磊: "炉辊更换调整技术", 《城市建设理论研究（电子版）》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282514A (en) * | 2016-08-17 | 2017-01-04 | 武汉钢铁股份有限公司 | Heat treatment furnace roller repairing and reusing method |
| CN106282514B (en) * | 2016-08-17 | 2018-10-16 | 武汉钢铁有限公司 | It is heat-treated furnace roller repairing and reusing method |
| US10464176B2 (en) | 2017-06-06 | 2019-11-05 | WTX Oil Fields Services, LLC | Fire tube installation and removal tool |
| CN110092296A (en) * | 2018-01-31 | 2019-08-06 | 上海二十冶建设有限公司 | Suspender and its application method for furnace roller lifting |
| CN115305337A (en) * | 2022-08-27 | 2022-11-08 | 湖南湘钢工程技术有限公司 | Process for replacing furnace roller of heat treatment furnace for medium and thick plates in steel mill in thermal state |
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Application publication date: 20140730 |