CN109081241B - Method for removing furnace nose of hot galvanizing unit - Google Patents
Method for removing furnace nose of hot galvanizing unit Download PDFInfo
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- CN109081241B CN109081241B CN201810894933.8A CN201810894933A CN109081241B CN 109081241 B CN109081241 B CN 109081241B CN 201810894933 A CN201810894933 A CN 201810894933A CN 109081241 B CN109081241 B CN 109081241B
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- furnace nose
- temporary support
- steel structure
- nose
- furnace
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a method for removing a furnace nose of a hot galvanizing unit, which comprises the following steps of shutting down the hot galvanizing unit, removing a zinc pot, stopping feeding and closing various media entering the furnace nose, removing and marking various media pipelines, and positioning the furnace nose at a shut-down position; manufacturing a temporary support and assembling the temporary support under the furnace nose, wherein the temporary support is connected with a steel structure for hanging the furnace nose, and the upright posts are respectively propped against a steel cross beam below the swinging mechanism and a pull rod cross beam of the furnace nose; a travelling crane and a steel beam hanging furnace nose large beam are cut, removed and hung to a storage area; removing the metal expansion joint and fixing the expansion amount of the metal expansion joint; and binding the furnace nose and the steel structure by using a hoisting steel wire rope, cutting off the connection between the steel structure and the foundation, and integrally hoisting the furnace nose, the steel structure and the temporary support to a storage area by using a crane to connect the hoisting steel wire rope so as to finish the dismantling of the furnace nose. The method improves the construction efficiency, reduces the workload, avoids potential safety hazards, ensures the integrity of the furnace nose sub-component, and improves the secondary installation precision of the furnace nose.
Description
Technical Field
The invention relates to a method for removing a furnace nose of a hot galvanizing unit.
Background
The hot galvanizing is a steel surface treatment method which is most widely applied and has the optimal cost performance ratio at present, the hot galvanizing product plays immeasurable and irreplaceable roles in reducing corrosion, prolonging service life, saving energy and materials, and meanwhile, the coated steel is also a high-value-added short-line product which is supported and preferentially developed by the country. A hot galvanizing unit for automobile sheet strip steel in an iron and steel plant is a main device of the iron and steel plant, and a zinc boiler nose which is a key device in the hot galvanizing unit is frequently required to be transformed and replaced for ensuring the quality of a hot galvanizing product.
However, the furnace nose is difficult to replace, and firstly, the project is an online modification, and most of the workload must be carried out in a shutdown state. The method comprises the steps of old equipment dismantling, new equipment installation and adjustment, old pipeline dismantling, new pipeline installation, cable laying and equipment installation of electric instrument speciality, single test and joint test are required, the task is heavy, and the construction period is very short.
Secondly, the furnace nose is dangerous in dismantling construction, most of dismantling construction work is carried out at the high-altitude edge part because the furnace nose is hung on a steel structure, so that a large amount of high-altitude edge part work exists, and in addition, a zinc pot area is arranged below the construction position, so that the furnace nose is very dangerous.
The requirement on the precision of the installation of equipment is high, the adjustment difficulty is high, and the furnace nose is used as the main equipment of the core process section of the hot galvanizing unit and has higher requirement on the precision of the installation position; the furnace nose comprises metal expansion joints, a furnace nose body comprising a swing mechanism and a telescopic mechanism, a lip and the like, wherein the metal expansion joints are connected with the zinc pot furnace body through flanges, and the furnace nose body is located on a steel structure through bearing seats of the swing mechanism and the telescopic mechanism. When the integral furnace nose is disassembled, if the integral furnace nose is disassembled into the parts, the integral connection precision and performance of the integral furnace nose are damaged, parts of the integral furnace nose can be damaged, the disassembling workload is large, the disassembling construction efficiency is low, and the subsequent assembling precision is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the method for dismantling the furnace nose of the hot galvanizing unit, the method effectively improves the construction efficiency of dismantling the furnace nose, reduces the dismantling workload, avoids the potential safety hazard of dismantling operation, ensures the completeness of furnace nose sub-components, and improves the precision of secondary installation of the furnace nose.
In order to solve the technical problem, the method for removing the furnace nose of the hot galvanizing unit comprises the following steps:
firstly, stopping a hot galvanizing unit, removing a zinc pot, stopping feeding and closing various media entering a furnace nose, removing and marking various media pipelines, and positioning the furnace nose at a stopping position;
step two, manufacturing a temporary support, wherein the temporary support comprises a rectangular base, four upright posts vertically arranged at four corners of the rectangular base and a cross beam arranged between the adjacent upright posts, the temporary support is arranged below a furnace nose and assembled below the furnace nose, the furnace nose is suspended through a steel structure, two upright posts on one side of the rectangular base are supported on the steel structure cross beam below a swinging mechanism, two upright posts on the other side of the rectangular base are supported on the steel structure cross beam of a furnace nose pull rod, and a furnace nose body is positioned in the temporary support;
thirdly, cutting and detaching the large cross beam by adopting a traveling crane and a steel beam hanging furnace nose large cross beam, and hanging the large cross beam to a storage area for upright storage;
fourthly, dismantling a flange connecting bolt of the metal expansion joint and the zinc boiler body, and fixing the expansion amount of the metal expansion joint by adopting a pull rod before dismantling;
and fifthly, binding the furnace nose and the steel structure by using a hoisting steel wire rope, cutting off the connection between the steel structure and the foundation, removing the maintenance hoist, the pedestrian passageway platform and the electric hoist for zinc addition on the steel structure, integrally hoisting the furnace nose, the steel structure and the temporary support to a storage area by using a travelling crane to connect the hoisting steel wire rope, and vertically storing to finish the removal of the furnace nose.
Further, the temporary support further comprises a cross support rod, and the cross support rod is arranged between the adjacent stand columns in the length direction of the rectangular base.
Further, all parts of the temporary support are connected by electric welding.
The method for removing the furnace nose of the hot galvanizing unit adopts the technical scheme, namely the method comprises the steps of firstly shutting down the hot galvanizing unit, removing a zinc pot, stopping feeding and closing various media entering the furnace nose, removing and marking various media pipelines, and positioning the furnace nose at a shut-down position; manufacturing a temporary support and assembling the temporary support under the furnace nose, wherein the temporary support is connected with a steel structure for hanging the furnace nose, and the upright posts are respectively propped against a steel cross beam below the swinging mechanism and a pull rod cross beam of the furnace nose; a travelling crane and a steel beam are adopted to hang a large cross beam of the furnace nose, the large cross beam is cut and removed, and the furnace nose is hung to a storage area to be stored vertically; removing the metal expansion joint and fixing the expansion amount of the metal expansion joint; and binding the furnace nose and the steel structure by using a hoisting steel wire rope, cutting off the connection between the steel structure and the foundation, removing the auxiliary parts on the steel structure, and connecting the hoisting steel wire rope by a travelling crane to integrally hoist the furnace nose, the steel structure and the temporary support to a storage area for upright storage so as to finish the dismantling of the furnace nose. The method effectively improves the construction efficiency of the furnace nose dismantling, reduces the dismantling workload, avoids the potential safety hazard of the dismantling operation, ensures the completeness of furnace nose components, and improves the precision of the secondary installation of the furnace nose.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic view of a method for removing a furnace nose of a hot galvanizing unit according to the invention;
FIG. 2 is a schematic view of a temporary stent in the present method.
Detailed Description
Embodiment example as shown in fig. 1 and fig. 2, the method for removing the furnace nose of the hot galvanizing unit comprises the following steps:
firstly, stopping a hot galvanizing unit, removing a zinc pot 2, stopping feeding and closing various media entering a furnace nose 3, removing and marking various media pipelines, and positioning the furnace nose 3 at a stopping position;
step two, manufacturing a temporary support 1, wherein the temporary support 1 comprises a rectangular base 11, four upright posts 12 vertically arranged at four corners of the rectangular base 11 and a cross beam 13 arranged between the adjacent upright posts 12, the temporary support 1 is arranged below a furnace nose 3 and assembled below the furnace nose 3, the furnace nose 3 is suspended through a steel structure 4, two upright posts at one side of the rectangular base are propped against the steel structure 4 cross beam below a swing mechanism, two upright posts at the other side of the rectangular base are propped against the steel structure 4 cross beam of a pull rod of the furnace nose 3, and a furnace nose 3 body is positioned in the temporary support 1;
thirdly, cutting and removing the large cross beam 5 by adopting a traveling crane and a steel beam hanging furnace nose large cross beam 5, and hanging the large cross beam 5 to a storage area for vertical storage;
fourthly, dismantling a flange connecting bolt of the metal expansion joint 6 and the zinc pot 2, and fixing the expansion amount of the metal expansion joint 6 by adopting a pull rod before dismantling;
step five, binding the furnace nose 3 and the steel structure 4 by using a hoisting steel wire rope, cutting off the connection between the steel structure 4 and the foundation, removing the maintenance hoist, the pedestrian passageway platform and the electric hoist for zinc addition on the steel structure 4, integrally hoisting the furnace nose 3, the steel structure 4 and the temporary support 1 to a storage area by using a travelling crane connecting hoisting steel wire rope for vertical storage, and finishing the removal of the furnace nose 3.
Preferably, the temporary support 1 further comprises a cross brace 14, and the cross brace 14 is arranged between adjacent upright posts 12 in the length direction of the rectangular base 11. The cross brace is used for further improving the rigidity of the temporary support and ensuring the bearing capacity of the temporary support.
Preferably, the parts of the temporary support 1 are connected by electric welding.
In order to ensure the secondary installation precision of the furnace nose and avoid the damage of the furnace nose part in the dismounting process, the method adopts the integral dismounting mode of the furnace nose, so that the damage to the furnace nose is minimum, the construction period is shortest, the temporary support is arranged when the furnace nose reaches the stop position after the stop, the dismounting work of other equipment is not influenced, and the dismounting work can be carried out simultaneously; the furnace nose is integrally fixed through the temporary support, so that the furnace nose is convenient to hoist, and the integral dismantling of the furnace nose is realized.
Claims (3)
1. A method for removing a furnace nose of a hot galvanizing unit is characterized by comprising the following steps:
firstly, stopping a hot galvanizing unit, removing a zinc pot, stopping feeding and closing various media entering a furnace nose, removing and marking various media pipelines, and positioning the furnace nose at a stopping position;
step two, manufacturing a temporary support, wherein the temporary support comprises a rectangular base, four upright posts vertically arranged at four corners of the rectangular base and a cross beam arranged between the adjacent upright posts, the temporary support is arranged below a furnace nose and assembled below the furnace nose, the furnace nose is suspended through a steel structure, two upright posts on one side of the rectangular base are supported on the steel structure cross beam below a swinging mechanism, two upright posts on the other side of the rectangular base are supported on the steel structure cross beam of a furnace nose pull rod, and a furnace nose body is positioned in the temporary support;
thirdly, cutting and detaching the large cross beam by adopting a traveling crane and a steel beam hanging furnace nose large cross beam, and hanging the large cross beam to a storage area for upright storage;
fourthly, dismantling a flange connecting bolt of the metal expansion joint and the zinc boiler body, and fixing the expansion amount of the metal expansion joint by adopting a pull rod before dismantling;
and fifthly, binding the furnace nose and the steel structure by using a hoisting steel wire rope, cutting off the connection between the steel structure and the foundation, removing the maintenance hoist, the pedestrian passageway platform and the electric hoist for zinc addition on the steel structure, integrally hoisting the furnace nose, the steel structure and the temporary support to a storage area by using a travelling crane to connect the hoisting steel wire rope, and vertically storing to finish the removal of the furnace nose.
2. The method for removing the furnace nose of the hot galvanizing unit according to claim 1, wherein: the temporary support further comprises a cross support rod, and the cross support rod is arranged between the adjacent stand columns in the length direction of the rectangular base.
3. The method for removing the furnace nose of the hot galvanizing unit according to claim 1 or 2, wherein: all parts of the temporary support are connected by electric welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810894933.8A CN109081241B (en) | 2018-08-08 | 2018-08-08 | Method for removing furnace nose of hot galvanizing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810894933.8A CN109081241B (en) | 2018-08-08 | 2018-08-08 | Method for removing furnace nose of hot galvanizing unit |
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| Publication Number | Publication Date |
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| CN109081241A CN109081241A (en) | 2018-12-25 |
| CN109081241B true CN109081241B (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810894933.8A Active CN109081241B (en) | 2018-08-08 | 2018-08-08 | Method for removing furnace nose of hot galvanizing unit |
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| CN (1) | CN109081241B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112680773B (en) * | 2020-12-17 | 2022-10-28 | 中国二十冶集团有限公司 | Dismounting, updating and reforming method for electroplating bath of electrotinning unit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3823981A1 (en) * | 1987-09-10 | 1989-03-23 | Rolf Mintert | Galvanising unit for small components |
| KR20040031308A (en) * | 2002-10-04 | 2004-04-13 | 주식회사 포스코 | Dross removal apparatus of snout inside for zinc galva-nizing pot |
| CN102127727B (en) * | 2011-04-22 | 2015-02-04 | 上海东新冶金技术工程有限公司 | Grate for hot galvanizing |
| CN203307408U (en) * | 2013-06-08 | 2013-11-27 | 首钢总公司 | Lifting appliance for cleaning zinc ash inside zinc boiler nose |
| CN204401088U (en) * | 2015-01-16 | 2015-06-17 | 中国十九冶集团有限公司 | Underground zinc boiler nose fast assembling-disassembling platform |
| CN205258554U (en) * | 2015-12-28 | 2016-05-25 | 中国钢研科技集团有限公司 | Stove nose chute with wear belting |
| CN108342673B (en) * | 2017-01-22 | 2020-04-21 | 宝钢新日铁汽车板有限公司 | Online position adjusting device of zinc boiler nose |
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2018
- 2018-08-08 CN CN201810894933.8A patent/CN109081241B/en active Active
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| CN109081241A (en) | 2018-12-25 |
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