CN104878139A - One-step integral hoisting method for Y-shaped three-way-type downcomer of blast furnace - Google Patents
One-step integral hoisting method for Y-shaped three-way-type downcomer of blast furnace Download PDFInfo
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- CN104878139A CN104878139A CN201510279388.8A CN201510279388A CN104878139A CN 104878139 A CN104878139 A CN 104878139A CN 201510279388 A CN201510279388 A CN 201510279388A CN 104878139 A CN104878139 A CN 104878139A
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Abstract
The invention discloses a one-step integral hoisting method for a Y-shaped three-way-type downcomer of a blast furnace. The one-step integral hoisting method includes the technological steps of 1, welding of the Y-shaped three-way-type downcomer of the blast furnace, 2, hoisting preparation and 3, hoisting completion. According to one-step integral hoisting method, reasonable structure and safety and reliability in use are achieved; compared with conventional hoisting modes (hoisting at upper and lower positions), the one-step integral hoisting method has the advantages that the turning radius of a crane is reduced, tonnage of the crane is reduced, rent expense of a large crane and project cost are saved, construction period is shortened, mounting quality of the Y-shaped three-way-type downcomer of the blast furnace is improved effectively, and construction cost is reduced.
Description
Technical field
The invention belongs to lifting field, especially relate to blast furnace Y-type three way type formula downtake integral hoisting installation method.
Background technology
Convenient in order to ensure the aerial counterpart of blast furnace downtake, open elbow and select in straight section docking, downtake is divided into upper, middle and lower segment, and epimere, hypomere respectively with upper and lower elbow complete installation, and then install stage casing, and stage casing is Y-type three way type formula downtake.
At present, in the process that blast furnace in metallurgical industry is installed, often because of the requirement of design and processes, the restriction of workyard.In blast furnace downtake, segment type is also different, has through-type, Y-type three way type, spherical.Because skew bridge, blast furnace center, gravitational dust collection center will keep point-blank, usually select three way type downtake.Because three way type downtake profile is that inverted " Y " type volume is large, span long, Heavy Weight, operation is carried out with regard to needing large-scale loop wheel machine, large-scale crane lease expenses is high, the singularity that workyard is narrow and small simultaneously, and hoisting difficulty is large, Y-type three way type formula downtake location difficulty, lifting depends on the choose reasonable of operative employee to suspension centre, and as there is deviation, Y-type three way type formula downtake easily waves and causes lifting repeatedly in place,, also there is potential safety hazard in not only schedule delays.
Summary of the invention
Technical problem to be solved by this invention is to provide blast furnace Y-type three way type formula downtake integral hoisting installation method, and unsafe factor in effective prevention and control three way type downtake hoisting process, shortens the aerial docking port time, and safety is economical again, reduces construction cost.
For achieving the above object, the present invention proposes blast furnace Y-type three way type formula downtake integral hoisting installation method, and it comprises following processing step:
One, the welding of blast furnace Y-type three way type formula downtake, left arm, right arm and supervisor are become Y-type three way type in assembly platform welding, left arm and right manifold configuration, specification are identical with model, left arm and right arm rotational symmetry centered by supervisor center is arranged, left arm and right arm include straight tube and inclined tube, in straight tube center of gravity and inclined tube center of gravity, suspension centre is set respectively, adopt entirely to melt at suspension centre respectively and weld hanger, hanger adopts 50mm Plate Steel to make, and hanger is of a size of 400mm × 250mm; Hanger visual examination of weld, does not allow to there is crackle and incomplete fusion defect, carries out magnetic or nondestructive flaw detection examination if desired;
Two, lifting prepares, hanger hole respectively on the straight tube and inclined tube of left arm and right arm wears suspension hook, equipped two the 65 tons of buckles lifting in hanger hole respectively on the straight tube of left arm and right arm, equipped two the 25 tons of buckles lifting in hanger hole respectively on the inclined tube of left arm and right arm also joins a chain block adjustment downtake angle respectively; The wireline of 6*37+1 FC fiber core, Ф 43mm selected by wireline, the hanger hole that two secondary wireline are each passed through on the straight tube of 65 tons of buckles and left arm and right arm is fixed, hanger hole on the inclined tube of two secondary steel wire penetrating, 25 tons of buckles and left arm and right arm is fixed, the wireline be connected with the suspension centre on straight tube is 6m, and the wireline be connected with the suspension centre on inclined tube is 10m; Left arm straight tube and the upper and lower two secondary wireline of inclined tube are connected to form a left suspension centre, and right arm straight tube and the upper and lower two secondary wireline of inclined tube are connected to form a right suspension centre, and left suspension centre and right suspension centre are symmetrical arranged and on same level height;
Three, hoisted in position, parallel with two cranes that right arm straight tube connects with left arm straight tube when lifting respectively, with left arm inclined tube, the chain block that right arm inclined tube connecting steel wire ropes connects adjusts the angle of left arm and the angle of right arm simultaneously, make the levelness of two arm, highly, angle is consistent, Y shape three way type downtake integrated regulation is become 52 ° of angles with horizontal plane, hang steadily through twice examination and start formal lifting, two cranes lift by crane Y-type three way type formula downtake respectively simultaneously, realize left arm, right arm and supervisor's synchronization lifting, because Y-type three way type formula downtake volume is large, Heavy Weight, span is large, Y-type three way type formula downtake integral hoisting installation method is very effective, both ensure that safety, also ensure that the installation quality of downtake while of the duration have also been obtained raising.
Blast furnace Y-type three way type formula downtake integral hoisting installation method proposed by the invention, rational in infrastructure, safe and reliable, compare traditional lifting mode (upper-lower position lifts), reduce the turning radius of crane, reduce and use crane tonnage, save large crane lease expenses, also save project cost and duration simultaneously, effectively improve the installation quality of blast furnace Y-type three way type formula downtake, reduce construction cost.
Accompanying drawing explanation
Fig. 1 is the structural representation that blast furnace Y-type three way type formula downtake entirety proposed by the invention is hung.
Fig. 2 is A-A structural representation in Fig. 1.
Embodiment
See accompanying drawing, blast furnace Y-type three way type formula downtake integral hoisting installation method, it comprises following processing step:
One, the welding of blast furnace Y-type three way type formula downtake, by left arm 1, right arm 2 and supervisor 3 become Y-type three way type in assembly platform welding, left arm and right manifold configuration, specification is identical with model, left arm and right arm rotational symmetry centered by supervisor center is arranged, left arm and right arm include straight tube and inclined tube, in straight tube center of gravity and inclined tube center of gravity, suspension centre is set respectively, respectively at left arm straight tube suspension centre 4, left arm inclined tube suspension centre 5, right arm straight tube suspension centre 6, right arm inclined tube suspension centre 7 adopts entirely to melt and welds hanger, hanger adopts 50mm Plate Steel to make, hanger is of a size of 400mm × 250mm, hanger visual examination of weld, does not allow to there is crackle and incomplete fusion defect, carries out magnetic or nondestructive flaw detection examination if desired,
Two, lifting prepares, hanger hole respectively on the straight tube and inclined tube of left arm and right arm wears suspension hook, equipped two the 65 tons of buckles lifting in hanger hole respectively on the straight tube of left arm and right arm, equipped two the 25 tons of buckles lifting in hanger hole respectively on the inclined tube of left arm and right arm also joins a chain block adjustment downtake angle respectively; The wireline of 6*37+1 FC fiber core, Ф 43mm selected by wireline, the hanger hole that two secondary wireline are each passed through on the straight tube of 65 tons of buckles and left arm and right arm is fixed, hanger hole on the inclined tube of two secondary steel wire penetrating, 25 tons of buckles and left arm and right arm is fixed, the wireline be connected with the suspension centre on straight tube is 6m, and the wireline be connected with the suspension centre on inclined tube is 10m; Left arm straight tube and the upper and lower two secondary wireline of inclined tube are connected to form a left suspension centre, and right arm straight tube and the upper and lower two secondary wireline of inclined tube are connected to form a right suspension centre, and left suspension centre and right suspension centre are symmetrical arranged and on same level height;
Three, hoisted in position, parallel with two cranes that right arm straight tube connects with left arm straight tube when lifting respectively, with left arm inclined tube, the chain block that right arm inclined tube connecting steel wire ropes connects adjusts the angle of left arm and the angle of right arm simultaneously, make the levelness of two arm, highly, angle is consistent, Y shape three way type downtake integrated regulation is become 52 ° of angles with horizontal plane, hang steadily through twice examination and start formal lifting, two cranes lift by crane Y-type three way type formula downtake respectively simultaneously, realize left arm, right arm and supervisor's synchronization lifting, because Y-type three way type formula downtake volume is large, Heavy Weight, span is large, Y-type three way type formula downtake integral hoisting installation method is very effective, both ensure that safety, also ensure that the installation quality of downtake while of the duration have also been obtained raising.
In October, 2014, in certain Steel Plant's blast furnace downtake hoisting process, according to former construction experience because downtake volume is large, Heavy Weight, arm is after downtake lifts with the stair on supervisor, handrail, carry out aerial welded and installed again, downtake lifting weight is reduced with this, avoid the risk of welding operation aloft, adopt the disposable installation method of this Y-type three way type formula downtake integral hoisting, solve the risk of downtake stair, handrail aloft welded and installed, both ensure that the safety of construction operation also ensure that the quality of construction.Decrease the workload of working aloft, also save the safety prevention measure expense of working aloft.
Conventional lifting mode is that employing two crane upper-lower positions lift.During upper-lower position lifting, the operation turning radius of crane is larger, and thus two crane (upper-lower position lifts) tonnages are more much larger than the tonnage of two cranes (left-right balance lifts) in predetermined scheme.Large crane expense also can increase thereupon.Use the disposable installation method of Y-type three way type formula downtake integral hoisting, reduce operating radius during two crane liftings, also can ensure that construction speed, safety, quality simultaneously.The workload of installing saves 2-3 days time, has saved security measures expense, cost of labor, crane cost and be about 36000 yuan altogether.
Blast furnace Y-type three way type formula downtake integral hoisting installation method proposed by the invention, rational in infrastructure, safe and reliable, compare traditional lifting mode (upper-lower position lifts), reduce the turning radius of crane, reduce and use crane tonnage, save large crane lease expenses, also save project cost and duration simultaneously, effectively improve the installation quality of blast furnace Y-type three way type formula downtake, reduce construction cost.
Claims (1)
1. blast furnace Y-type three way type formula downtake integral hoisting installation method, is characterized in that it comprises following processing step:
One, the welding of blast furnace Y-type three way type formula downtake, left arm, right arm and supervisor are become Y-type three way type in assembly platform welding, left arm and right manifold configuration, specification are identical with model, left arm and right arm rotational symmetry centered by supervisor center is arranged, left arm and right arm include straight tube and inclined tube, in straight tube center of gravity and inclined tube center of gravity, suspension centre is set respectively, adopt entirely to melt at suspension centre respectively and weld hanger, hanger adopts 50mm Plate Steel to make, and hanger is of a size of 400mm × 250mm; Hanger visual examination of weld, does not allow to there is crackle and incomplete fusion defect, carries out magnetic or nondestructive flaw detection examination if desired;
Two, lifting prepares, hanger hole respectively on the straight tube and inclined tube of left arm and right arm wears suspension hook, equipped two the 65 tons of buckles lifting in hanger hole respectively on the straight tube of left arm and right arm, equipped two the 25 tons of buckles lifting in hanger hole respectively on the inclined tube of left arm and right arm also joins a chain block adjustment downtake angle respectively; The wireline of 6*37+1 FC fiber core, Ф 43mm selected by wireline, the hanger hole that two secondary wireline are each passed through on the straight tube of 65 tons of buckles and left arm and right arm is fixed, hanger hole on the inclined tube of two secondary steel wire penetrating, 25 tons of buckles and left arm and right arm is fixed, the wireline be connected with the suspension centre on straight tube is 6m, and the wireline be connected with the suspension centre on inclined tube is 10m; Left arm straight tube and the upper and lower two secondary wireline of inclined tube are connected to form a left suspension centre, and right arm straight tube and the upper and lower two secondary wireline of inclined tube are connected to form a right suspension centre, and left suspension centre and right suspension centre are symmetrical arranged and on same level height;
Three, hoisted in position, parallel with two cranes that right arm straight tube connects with left arm straight tube when lifting respectively, the chain block be connected with left arm inclined tube, right arm inclined tube connecting steel wire ropes adjusts the angle of left arm and the angle of right arm simultaneously, make the levelness of two arm, highly, angle is consistent, Y shape three way type downtake integrated regulation is become 52 ° of angles with horizontal plane, hang steadily through twice examination and start formal lifting, two cranes lift by crane Y-type three way type formula downtake respectively simultaneously, realize left arm, right arm and supervisor's synchronization lifting.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106322347A (en) * | 2016-08-22 | 2017-01-11 | 上海二十冶建设有限公司 | Construction method for enabling water-cooling walls of refuse incineration power generation waste heat boiler to integrally penetrate from top |
| CN112481437A (en) * | 2020-11-27 | 2021-03-12 | 上海宝冶冶金工程有限公司 | Blast furnace Y-shaped downcomer dismounting and replacing method |
| CN114480759A (en) * | 2021-12-23 | 2022-05-13 | 中国华冶科工集团有限公司 | Method for dismantling blast furnace downcomer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322347A (en) * | 2016-08-22 | 2017-01-11 | 上海二十冶建设有限公司 | Construction method for enabling water-cooling walls of refuse incineration power generation waste heat boiler to integrally penetrate from top |
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| CN112481437A (en) * | 2020-11-27 | 2021-03-12 | 上海宝冶冶金工程有限公司 | Blast furnace Y-shaped downcomer dismounting and replacing method |
| CN112481437B (en) * | 2020-11-27 | 2022-07-08 | 上海宝冶冶金工程有限公司 | Blast furnace Y-shaped downcomer dismounting and replacing method |
| CN114480759A (en) * | 2021-12-23 | 2022-05-13 | 中国华冶科工集团有限公司 | Method for dismantling blast furnace downcomer |
| CN114480759B (en) * | 2021-12-23 | 2023-08-22 | 中国华冶科工集团有限公司 | Method for dismantling down tube of blast furnace |
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| CN104878139B (en) | 2017-01-04 |
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Inventor after: Wang Qingsheng Inventor after: Wu Mengju Inventor after: Weng Yongrong Inventor after: Ming Louchun Inventor before: Wang Qingsheng Inventor before: Wu Mengju Inventor before: Weng Yongrong |
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