CN102556853B - Metallurgical crane dismantling method - Google Patents
Metallurgical crane dismantling method Download PDFInfo
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- CN102556853B CN102556853B CN201110459543.6A CN201110459543A CN102556853B CN 102556853 B CN102556853 B CN 102556853B CN 201110459543 A CN201110459543 A CN 201110459543A CN 102556853 B CN102556853 B CN 102556853B
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Abstract
A metallurgical crane dismantling method includes the following steps: using a first truck crane to place a plate hook of a metallurgical crane on the ground, and using a second truck crane to carry the plate hook to a specific position; using an electric hoist to dismantle a speed reducer and a winding drum on a main trolley and an auxiliary trolley of the metallurgical crane; using the other metallurgical crane to haul the metallurgical crane to a hoisting beam on the other side of a workshop, and enabling a winch to dismantle a main trolley body and an auxiliary trolley body; using the electric hoist and the winch to dismantle a cab and an electric room; using the other metallurgical crane to haul the metallurgical crane to the other side of the workshop, and using the electric hoist to dismantle a first auxiliary beam, a second auxiliary beam, a first auxiliary end beam and a second auxiliary end beam; using the electric hoist to dismantle a first main end beam and a second main end beam; using the electric hoist to dismantle a main trolley running device, a main trolley transmission system, an auxiliary trolley running device and an auxiliary trolley transmission system, and dismantling tracks on the first main end beam and the second main end beam; and partially hollowing out a first main beam and a second main beam, and using the electric hoist to dismantle the first main beam and the second main beam in a subsection mode.
Description
Technical field
The invention belongs to smelting system Large-scale Hoisting overhaul of the equipments field, more particularly, relate to a kind of large-scale metallurgical crane dismantling method.
Background technology
In the smelting process of iron and steel, conventionally by sheet billet continuous casting technique, produce steel-making slab.The weight of steel-making slab can reach hundreds of tons, therefore needs large-scale metallurgical crane to carry out handling to steel-making slab, to carry out subsequent technique.
(for example, remove the new factory building of old the enlargement of the factory buildings) in some cases, need to remove large-scale metallurgical crane.Yet generally, it is narrow and small that large-scale metallurgical crane dismounts and mounts workyard, cannot arrange Large-scale Hoisting facility, cannot directly utilize winch to lift, the auxiliary hoisting machine tools such as mast cannot be set.Therefore, at the current large-scale metallurgical crane of removing, also there is many difficulties.
Summary of the invention
Difficulty for removing the existence of large-scale metallurgical crane in prior art, the invention provides a kind of metallurgical crane dismantling method, adopts the method can remove easily and safely the metallurgical crane for 200 tons of above steel-making slabs of handling.
According to an aspect of the present invention, a kind of metallurgical crane dismantling method is provided, said method comprising the steps of: before metallurgical crane stops, use described metallurgical crane the first wheel crane to be placed on the hole for hoist platform of predetermined altitude in factory building, then metallurgical crane is parked in to a side of factory building, use the first wheel crane that the plate hook of metallurgical crane is put to ground from hole for hoist platform, on ground, place the second wheel crane, use the second wheel crane that plate hook is transported to assigned address; Use the hoist ceiling crane arranging in factory building that the reductor on the reductor on the main carriage of metallurgical crane and reel and secondary dolly and reel are removed and are placed on described platform, use the first wheel crane and the second wheel crane that the reductor on the reductor on the main carriage of dismounting and reel and secondary dolly and reel cooperation are transported to ground and are transported to assigned address; Use another metallurgical crane in factory building that described metallurgical crane is hauled to the hoisting beam that is arranged on the opposite side of factory building, utilize the winch on this hoisting beam to remove main carriage car body and secondary dolly car body; Utilize hoist ceiling crane and winch to decompose operator's compartment and the electric panel room of removing metallurgical crane; Use described another metallurgical crane that metallurgical crane is hauled to the described side to factory building, use hoist ceiling crane to remove the first auxiliary girder and second auxiliary girder of metallurgical crane, then use hoist ceiling crane to remove the first secondary end carriage and the second secondary end carriage of metallurgical crane; Use hoist ceiling crane to remove respectively the first main side beam and the second main side beam of metallurgical crane; Use hoist ceiling crane to remove main carriage running gear, main carriage driving system, secondary dolly running gear and secondary dolly driving system, remove the track on the first main side beam and the second main side beam; The first girder of metallurgical crane and the second girder are carried out to part and hollow out, use hoist ceiling crane segmentation to remove the first girder and the second girder, complete the dismounting of metallurgical crane.
When removing the first main side beam and the second main side beam, can below the first girder and the second girder and between the wheel of metallurgical crane, add cushion block fixing and weld temporarily.
The step of removing the first girder can comprise: the first fixed arm and the second fixed arm are set, the first girder is fixed to hoist ceiling crane hanging beam; The upper flange of the first girder, the first web, the second web are carried out to part to be hollowed out; The first girder segmentation is cut into a plurality of parts, and use hoist ceiling crane by described a plurality of part handlings to ground.
One end of the first fixed arm can be welded to about 1/6 girder extension position place of the first girder, and the other end of the first fixed arm extends straight up and is welded to hoist ceiling crane hanging beam; One end of the second fixed arm can be welded to about 5/6 extension position place of the first girder, and the other end of the second fixed arm extends straight up and is welded to hoist ceiling crane hanging beam.
Can hollow out a plurality of regions according to the size of upper flange compartment of terrain on upper flange.
Can be at twice the first web of the first girder and the second web be carried out to part dislocation and hollow out, hollow out for the first time: in the first web compartment of terrain, hollow out a plurality of first areas; In the second web compartment of terrain, hollow out a plurality of the 3rd regions, a plurality of second areas between described a plurality of first areas of described a plurality of the 3rd region and the first web are corresponding one by one, hollow out for the second time: in the first web compartment of terrain, hollow out a plurality of second areas, described a plurality of second areas lay respectively between a plurality of first areas; In the second web compartment of terrain, hollow out a plurality of the 4th regions, described a plurality of the 4th regions lay respectively between described a plurality of the 3rd region, and the described a plurality of first areas between a plurality of second areas of described a plurality of the 4th regions and the first web are corresponding one by one.
The first girder segmentation is cut into a plurality of parts and uses hoist ceiling crane that the step to ground can comprise by described a plurality of part handlings: the first girder is divided into five parts, first is that about 1/6 girder extension position is arrived in one end of the first girder, second portion is that about 1/6 girder extension position is to about 1/3 girder extension position, third part is that about 1/3 girder extension position is to about 2/3 girder extension position, the 4th part is that about 2/3 girder extension position is to about 5/6 girder extension position, the 5th part is the other end of about 5/6 girder extension position to the first girder 3, first comprises the position of weld of the first fixed arm and the first girder, the 5th part comprises the position of weld of the second fixed arm and the first girder, two of the two ends of the third part of the first girder welding, hang nose, by steel cable, connect two and hang nose and hoist ceiling crane suspension hook, then from the first girder, cut away third part, use hoist ceiling crane by third part handling to ground, nose is hung in middle part welding at second portion, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the first girder, cuts away second portion, use hoist ceiling crane by second portion handling to ground, in the tetrameric middle part welding, hang nose, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the first girder, cut away the 4th part, use hoist ceiling crane by the 4th part handling to ground, nose is hung in middle part welding in first, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from first, cuts away the first fixed arm, use hoist ceiling crane by first's handling to ground, nose is hung in middle part welding in the 5th part, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the 5th part, cuts away the second fixed arm, use hoist ceiling crane by the 5th part handling to ground.
Can remove the second girder according to the dismounting mode identical with the first girder.
Can carry out and hollow out operation and cutting operation by cutter.
By adopting according to metallurgical crane dismantling method of the present invention, without using Large-scale Hoisting facility, utilize the existing hoist ceiling crane of factory building, winch etc. can remove easily the metallurgical crane for 200 tons of above steel-making slabs of handling, be convenient to replacing or the maintenance of metallurgical crane.
Accompanying drawing explanation
By the description of exemplary embodiment being carried out below in conjunction with accompanying drawing, these and/or other side of the present invention and advantage will become clear, and are easier to understand, wherein:
Fig. 1 is according to the birds-eye view of the overall structure of metallurgical crane of the present invention;
Fig. 2 is the diagram of circuit according to metallurgical crane dismantling method of the present invention;
Fig. 3 shows the schematic diagram of temporary fixed girder;
Fig. 4 shows the section drawing of the girder of metallurgical crane;
Fig. 5 shows the schematic diagram that the upper flange of girder is hollowed out;
Fig. 6 shows the schematic diagram that the web of girder is hollowed out.
The specific embodiment
Below, with reference to accompanying drawing, describe embodiments of the invention in detail.
Conventionally, be provided with two metallurgical cranes that structure is identical in factory building, these two metallurgical cranes can operate separately, and the operation that also can be fitted to each other, for handling steel-making slab and other associated components, material etc.
Fig. 1 is the birds-eye view of the overall structure of a metallurgical crane.With reference to Fig. 1, metallurgical crane comprises main carriage 1 and secondary dolly 2.Main carriage 1 is arranged on the first girder 3 and the second girder 4, and main carriage 1 can be by main carriage running gear along the guide rail cross motion on the first girder 3 and the second girder 4.Secondary dolly 2 is arranged on the first auxiliary girder 5 and the second auxiliary girder 6, and secondary dolly 2 can be by secondary dolly running gear along the guide rail cross motion on the first auxiliary girder 5 and the second auxiliary girder 6.The first girder 3 and the second girder 4 are connected to each other by the first main side beam 7 and the second main side beam 8.The first auxiliary girder 5 and the second auxiliary girder 6 are connected to each other by the first secondary end carriage 9 and the second secondary end carriage 10.The first secondary end carriage 9 and the second secondary end carriage 10 are all connected to the first girder 3 and the second girder 4.The two ends of the first girder 3 are provided with wheel, the two ends of the second girder 4 are also provided with wheel, these wheels can be supported by two longitudinal rails that are arranged on the desired height position of factory building, and can move along described two longitudinal rails, thereby drive main carriage 1 and secondary dolly 2 longitudinally to move.Therefore, metallurgical crane can the side (for example factory building north side/southern side) along two longitudinal rails from factory building moves to the relative opposite side (for example factory building southern side/north side) of factory building.Can the handling heavier steel-making slab of the main carriage 1 steel-making slab of 200 tons (for example weigh), the steel-making slab that secondary dolly 2 is can the handling relatively light steel-making slab of 60 tons (for example weigh).By cross motion and the longitudinal movement of main carriage 1 and secondary dolly 2, can be by the steel-making slab handling of Different Weight to assigned address.
Fig. 2 is the diagram of circuit according to metallurgical crane dismantling method of the present invention.
See figures.1.and.2, before removing metallurgical crane, according to the requirement of dead work, carry out the preparation (for example, the card of clearing the way, Warning light, suspension warning mark etc. are set) of work in every, after dead work completes, can carry out the dismounting work of metallurgical crane.
In step 201, before metallurgical crane stops, the described metallurgical crane of use for example, (is for example placed in factory building predetermined altitude by the first wheel crane (50 tons of wheel cranes), 16 meters are high) hole for hoist platform on, then metallurgical crane is parked in to a side (for example factory building southern side) of factory building, use the first wheel crane that the plate hook of metallurgical crane is put to zero meter face from hole for hoist platform, disconnect steel cable, at zero meter face, place the second wheel crane (for example 75 tons of wheel cranes), use the second wheel crane that plate hook is transported to assigned address.
In step 202; use the hoist ceiling crane (such as 16 tons of hoist ceiling cranes) arranging in factory building that (the reductor on the reductor on the main carriage of metallurgical crane and reel and secondary dolly and reel etc. are carried out to protective demolition; non-destructive is removed) and put to 16 meters of platforms; use the first wheel crane and the second wheel crane that the reductor on the reductor on the main carriage of dismounting and reel, secondary dolly and reel are coordinated and be transported to zero meter face, and be transported to assigned address.
In step 203, use another metallurgical crane in factory building that metallurgical crane is for example hauled, to the hoisting beam that is arranged on the opposite side (factory building north side) of factory building.Now, this hoisting beam has performed lifting and has prepared, and utilizes the winch on this hoisting beam to remove main carriage car body and secondary dolly car body.
In step 204, utilize hoist ceiling crane and winch, decompose operator's compartment and the electric panel room of removing metallurgical crane.Operator's compartment is arranged on the lower surface of lower wing plate of a girder in the first girder 3 and the second girder 4, and electric panel room is arranged on the upper surface of upper flange of a girder in the first girder 3 and the second girder 4.
In step 205, use described another metallurgical crane that metallurgical crane is hauled to the described side (for example southern side) to factory building.For example, the first auxiliary girder 5 and the second auxiliary girder 6 can weigh respectively 16.35 tons, after removing auxiliary girder track, can be respectively heavily approximately 14.35 tons, and can use 16 tons of hoist ceiling cranes to remove the first auxiliary girder 5 and the second auxiliary girder 6.Can adopt the mode of segmentation to remove, first use hoist ceiling crane to remove the first auxiliary girder 5 and the second auxiliary girder 6, then use hoist ceiling crane to remove the first secondary end carriage 9 and the second secondary end carriage 10.
In step 206, after removing the first auxiliary girder 5 and the second auxiliary girder 6, use hoist ceiling crane to remove respectively the first main side beam 7 and the second main side beam 8.The first main side beam 7 is all connected with the second girder 4 with the first girder 3 with the second main side beam 8.When removing the first main side beam 7 and the second main side beam 8, the moveable hinge of the first girder 3 and the second girder 4 need be fixed, particularly, can below the first girder 3 and the second girder 4 and between the wheel of metallurgical crane, add cushion block fixing and weld temporarily.
In step 207, use hoist ceiling crane to remove main carriage running gear, main carriage driving system, secondary dolly running gear, secondary dolly driving system, remove the track on the first main side beam 7 and the second main side beam 8.In track, can comprise corresponding smallclothes, remove the just subsidiary smallclothes of having removed of track.For example, track and smallclothes can nearly weigh 3 tons.
In step 208, the first girder 3 and the second girder 4 are carried out to part and hollow out, use hoist ceiling crane to remove the first girder 3 and the second girder 4, complete the dismounting of metallurgical crane.Because girder is heavier, therefore need to hollow out and segmentation dismounting girder part.
Particularly, the first fixed arm and the second fixed arm are set, one end of the first fixed arm is welded to about 1/6 girder extension position place of the first girder 3, and the other end of the first fixed arm extends straight up and is welded to hoist ceiling crane hanging beam; One end of the second fixed arm is welded to about 5/6 extension position place of the first girder 3, and the other end of the second fixed arm extends straight up and is welded to hoist ceiling crane hanging beam.The first fixed arm and the second fixed arm, as temporary fastening device, are fixed to hoist ceiling crane hanging beam by the first girder 3.The first fixed arm and the second fixed arm can be made by No. 20 steel.Fig. 3 shows the schematic diagram of temporary fixed the first girder 3, wherein, (b) in Fig. 3 is along the section drawing of the A-A line intercepting of (a) in Fig. 3, wherein, label 301, 302 represent that intercolumniation supports lower edge, label 303 represents the first fixed arm, label 304 represents the second fixed arm, label 305, 306 represent 2 * 2 polyspast, label 307 represents hoist ceiling crane hanging beam, label 308 is illustrated in the clamp welding on hoist ceiling crane hanging beam, label 309 is illustrated in the nose that hangs welding on girder, label 310 represents that the first fixed arms and the second fixed arm are inserted in the upper flange of girder and welds.
Fig. 4 shows the section drawing of the first girder 3.With reference to Fig. 4, the first girder 3 comprises upper flange 31, the first web 32, the second web 33 and lower wing plate 34.Upper flange 31, the first web 32, the second web 33 and lower wing plate 34 have predetermined thickness, and the girder of the hollow of the formation strip shape that is bonded to each other.The structure of the second girder 4 can be identical with the structure of the first girder 3.
When removing the first girder 3, need to upper flange 31, the first web 32, the second web 33 be carried out part and be hollowed out, to alleviate the weight of the first girder 3.Can use cutter to cut away the specific part of upper flange 31, the first web 32, the second web 33, carry out part and hollow out.
Fig. 5 shows the schematic diagram that the upper flange of girder is hollowed out.Referring to Fig. 5, can hollow out a plurality of regions according to the size of upper flange compartment of terrain on upper flange.Preferably, can equally spaced hollow out a plurality of regions.A plurality of regions that hollowed out two kinds of sizes in upper flange have been shown, i.e. the region of the region of 18 first sizes and 3 the second sizes, but this is only example, quantity and the size in the region can appropriate change hollowing out in Fig. 5.
Fig. 6 shows the schematic diagram that the web of girder is hollowed out.Referring to Fig. 6, can be at twice the first web of the first girder 3 and the second web be misplaced and hollowed out.Hollow out for the first time: in the first web compartment of terrain, hollow out a plurality of first areas, as shown in the I part in Fig. 6; In the second web compartment of terrain, hollow out a plurality of the 3rd regions, as shown in the II part in Fig. 6, a plurality of second areas between a plurality of first areas of a plurality of the 3rd regions and the first web are corresponding one by one.Hollow out for the second time: in the first web compartment of terrain, hollow out a plurality of second areas, a plurality of second areas lay respectively between a plurality of first areas, as shown in the II part in Fig. 6; In the second web compartment of terrain, hollow out a plurality of the 4th regions, a plurality of the 4th regions lay respectively between a plurality of the 3rd regions, and as shown in the I part in Fig. 6, a plurality of first areas between a plurality of second areas of a plurality of the 4th regions and the first web are corresponding one by one.Can hollow out for the first time at auxiliary girder period for removal.
That is, with the line of centers of girder, be as the criterion, can not hollow out with respect to the line of centers symmetry of girder, the hole at every turn hollowing out needs dislocation, prevents like this that crane girder partial points position is stressed and collapses.For example, the first web of the first girder 3 and the weight hollowing out for twice of the second web amount to and can reach 5.875 tons.
With reference to Fig. 6, to hollowing out 27 regions altogether for twice of the first web/the second web, but this is only example, the quantity in the region can appropriate change hollowing out.
The shape of the area of knockout of upper flange, the first web, the second web can be rectangle, circle, ellipse etc.
After the first girder 3 is hollowed out, the first girder 3 segmentations are cut into a plurality of parts, use hoist ceiling crane by described a plurality of part handlings to ground.
Preferably, with reference to Fig. 3, first the first girder 3 is divided into five parts, first is that about 1/6 girder extension position is arrived in one end of the first girder 3; Second portion is that about 1/6 girder extension position is to about 1/3 girder extension position; Third part is that about 1/3 girder extension position is to about 2/3 girder extension position; The 4th part is that about 2/3 girder extension position is to about 5/6 girder extension position; The 5th part is the other end of about 5/6 girder extension position to the first girder 3.First comprises the position of weld of the first fixed arm and the first girder 3, and the 5th part comprises the position of weld of the second fixed arm and the first girder 3.
Then, two of the two ends of the third part of the first girder 3 welding, hang nose, by steel cable, connect two and hang nose and hoist ceiling crane suspension hook, then from the first girder 3, cut away third part, use hoist ceiling crane by third part handling to ground.
Then, in the middle part welding of second portion, hang nose, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the first girder 3, cut away second portion, use hoist ceiling crane by second portion handling to ground.
Then, in the tetrameric middle part welding, hang nose, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the first girder 3, cut away the 4th part, use hoist ceiling crane by the 4th part handling to ground.
Second portion and tetrameric dismounting order are interchangeable.
Then, in the middle part welding of first, hang nose, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from first, cut away the first fixed arm, use hoist ceiling crane by first's handling to ground.
Then, in the middle part welding of the 5th part, hang nose, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the 5th part, cut away the second fixed arm, use hoist ceiling crane by the 5th part handling to ground.
The dismounting order of first and the 5th part is interchangeable.Can be respectively handling to first's to the five parts on ground be transported to assigned address.
Finally, can remove the second girder 4 according to the dismounting mode identical with the first girder 3.
By adopting according to metallurgical crane dismantling method of the present invention, without using Large-scale Hoisting facility, utilize the existing hoist ceiling crane of factory building, winch etc. can remove easily the metallurgical crane for 200 tons of above steel-making slabs of handling, be convenient to replacing or the maintenance of metallurgical crane.
Although the present invention is described in detail and shows with reference to its exemplary embodiment, but will be understood by those skilled in the art that, in the situation that do not depart from the spirit and scope of the present invention that are defined by the claims, can carry out to it various changes of form and details.
Claims (9)
1. a metallurgical crane dismantling method, comprises the following steps:
Before stopping, use metallurgical crane described metallurgical crane the first wheel crane to be placed on the hole for hoist platform of predetermined altitude in factory building, then metallurgical crane is parked in to a side of factory building, use the first wheel crane that the plate hook of metallurgical crane is put to ground from hole for hoist platform, on ground, place the second wheel crane, use the second wheel crane that plate hook is transported to assigned address;
Use the hoist ceiling crane arranging in factory building that the reductor on the reductor on the main carriage of metallurgical crane and reel and secondary dolly and reel are removed and are placed on described platform, use the first wheel crane and the second wheel crane that the reductor on the reductor on the main carriage of dismounting and reel and secondary dolly and reel cooperation are transported to ground and are transported to assigned address;
Use another metallurgical crane in factory building that described metallurgical crane is hauled to the hoisting beam that is arranged on the opposite side of factory building, utilize the winch on this hoisting beam to remove main carriage car body and secondary dolly car body;
Utilize hoist ceiling crane and winch to decompose operator's compartment and the electric panel room of removing metallurgical crane;
Use described another metallurgical crane that metallurgical crane is hauled to the described side to factory building, use hoist ceiling crane to remove the first auxiliary girder and second auxiliary girder of metallurgical crane, then use hoist ceiling crane to remove the first secondary end carriage and the second secondary end carriage of metallurgical crane;
Use hoist ceiling crane to remove respectively the first main side beam and the second main side beam of metallurgical crane;
Use hoist ceiling crane to remove main carriage running gear, main carriage driving system, secondary dolly running gear and secondary dolly driving system, remove the track on the first main side beam and the second main side beam;
The first girder of metallurgical crane and the second girder are carried out to part and hollow out, use hoist ceiling crane segmentation to remove the first girder and the second girder, complete the dismounting of metallurgical crane.
2. method according to claim 1 wherein, when removing the first main side beam and the second main side beam, adds cushion block fixing and weld temporarily below the first girder and the second girder and between the wheel of metallurgical crane.
3. method according to claim 1, wherein, the step of removing the first girder comprises:
The first fixed arm and the second fixed arm are set, the first girder is fixed to hoist ceiling crane hanging beam;
The upper flange of the first girder, the first web, the second web are carried out to part to be hollowed out;
The first girder segmentation is cut into a plurality of parts, and use hoist ceiling crane by described a plurality of part handlings to ground.
4. method according to claim 3, wherein, one end of the first fixed arm is welded to about 1/6 girder extension position place of the first girder, and the other end of the first fixed arm extends straight up and is welded to hoist ceiling crane hanging beam; One end of the second fixed arm is welded to about 5/6 extension position place of the first girder, and the other end of the second fixed arm extends straight up and is welded to hoist ceiling crane hanging beam.
5. method according to claim 4, wherein, hollows out a plurality of regions according to the size of upper flange compartment of terrain on upper flange.
6. method according to claim 5, wherein, carries out part dislocation to the first web of the first girder and the second web at twice and hollows out,
Hollow out for the first time: in the first web compartment of terrain, hollow out a plurality of first areas; In the second web compartment of terrain, hollow out a plurality of the 3rd regions, a plurality of second areas between described a plurality of first areas of described a plurality of the 3rd regions and the first web are corresponding one by one,
Hollow out for the second time: in the first web compartment of terrain, hollow out a plurality of second areas, described a plurality of second areas lay respectively between a plurality of first areas; In the second web compartment of terrain, hollow out a plurality of the 4th regions, described a plurality of the 4th regions lay respectively between described a plurality of the 3rd region, and the described a plurality of first areas between a plurality of second areas of described a plurality of the 4th regions and the first web are corresponding one by one.
7. method according to claim 6, wherein, is cut into a plurality of parts by the first girder segmentation and uses hoist ceiling crane that the step to ground comprises by described a plurality of part handlings:
The first girder is divided into five parts, first is that about 1/6 girder extension position is arrived in one end of the first girder, second portion is that about 1/6 girder extension position is to about 1/3 girder extension position, third part is that about 1/3 girder extension position is to about 2/3 girder extension position, the 4th part is that about 2/3 girder extension position is to about 5/6 girder extension position, the 5th part is the other end of about 5/6 girder extension position to the first girder, first comprises the position of weld of the first fixed arm and the first girder, the 5th part comprises the position of weld of the second fixed arm and the first girder,
Two of the two ends of the third part of the first girder welding, hang nose, by steel cable, connect two and hang nose and hoist ceiling crane suspension hook, then from the first girder, cut away third part, use hoist ceiling crane by third part handling to ground;
Nose is hung in middle part welding at second portion, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the first girder, cuts away second portion, use hoist ceiling crane by second portion handling to ground;
In the tetrameric middle part welding, hang nose, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the first girder, cut away the 4th part, use hoist ceiling crane by the 4th part handling to ground;
Nose is hung in middle part welding in first, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from first, cuts away the first fixed arm, use hoist ceiling crane by first's handling to ground;
Nose is hung in middle part welding in the 5th part, by steel cable connecting hanging nose and hoist ceiling crane suspension hook, then from the 5th part, cuts away the second fixed arm, use hoist ceiling crane by the 5th part handling to ground.
8. method according to claim 7, wherein, removes the second girder according to the dismounting mode identical with the first girder.
9. method according to claim 8, wherein, is carried out and is hollowed out operation and cutting operation by cutter.
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| CN110453934A (en) * | 2019-08-26 | 2019-11-15 | 攀钢集团工程技术有限公司 | Method for dismounting for large-scale steel structure roofing workshop |
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| CN101264845A (en) * | 2008-05-06 | 2008-09-17 | 首钢总公司 | Crown block high altitude integrated suspension transposition construction method |
| CN101723252A (en) * | 2009-11-11 | 2010-06-09 | 甘肃省电力公司刘家峡水电厂 | Overhead-traveling installation method of 400t overhead travelling crane replacement equipment |
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| JPS537068A (en) * | 1976-07-08 | 1978-01-23 | Nippon Crane Works | Automatic mounting and demounting device of tong* etc* in crane |
| JPH01252495A (en) * | 1988-03-30 | 1989-10-09 | Hitachi Plant Eng & Constr Co Ltd | Installation construction method of indoor crane |
| JP2562071B2 (en) * | 1990-03-20 | 1996-12-11 | 川鉄マシナリー株式会社 | How to replace the crane wire rope |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101264845A (en) * | 2008-05-06 | 2008-09-17 | 首钢总公司 | Crown block high altitude integrated suspension transposition construction method |
| CN101723252A (en) * | 2009-11-11 | 2010-06-09 | 甘肃省电力公司刘家峡水电厂 | Overhead-traveling installation method of 400t overhead travelling crane replacement equipment |
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