CN108249286B - Method for lifting gantry crane girder by lifting lugs and gantry crane girder - Google Patents
Method for lifting gantry crane girder by lifting lugs and gantry crane girder Download PDFInfo
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- CN108249286B CN108249286B CN201810013772.7A CN201810013772A CN108249286B CN 108249286 B CN108249286 B CN 108249286B CN 201810013772 A CN201810013772 A CN 201810013772A CN 108249286 B CN108249286 B CN 108249286B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005484 gravity Effects 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C6/00—Girders, or track-supporting structures, specially adapted for cranes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a method for lifting a gantry crane girder by a lifting lug and a gantry crane girder thereof, wherein the method comprises the following steps: step 1, integrally manufacturing lifting lugs on a main beam; step 2, balancing the main beam and adjusting the gravity center of the main beam; step 3, hanging the main beam to the high altitude, swinging the main beam under the action of wind power, and adjusting and stabilizing the main beam through a wind rope; and 4, configuring a girder hoisting rigging. The method for lifting the gantry crane girder by the lifting lug solves the assembly problems of large size and heavy weight of the gantry crane girder and has low installation risk.
Description
Technical Field
The invention relates to a gantry crane girder and a final assembly method thereof, in particular to a method for lifting a gantry crane girder by a lifting lug and a gantry crane girder thereof.
Background
The main beam hoisting is a difficult problem of the final assembly of the gantry crane, and under certain working environments, the main beam has the characteristics of super-long (about 176 meters), overweight (about 2590 tons in total weight), double box beams and the like. The portal crane final assembly wharf often has special situations, such as complicated terrain, high risk cross-operations involving waters, land, high altitudes, etc. in a dock. On the other hand, the wharf has too many interference objects, such as office building, dock gates, door machines, climbing towers and the like, and a plurality of places cannot bear load, so that the arrangement space of a winch is limited, equipment such as a forklift, a crane and the like is difficult to enter an operation area, particularly the center of a gantry crane is far away from a coastline, so that the hoisting of a main beam approaches to the hoisting limit of a floating crane, the safety risk is very high, and the main beam is also a key link for the success or failure of the assembly of the gantry crane.
The conventional gantry crane assembly scheme adopts a floating crane connecting joist hoisting scheme, namely, two large joists are padded under a main girder, the floating crane is used for hoisting the joists for assembly, the gantry crane needs to be dismantled in consideration of the unexpected factors in the future, and if the joists are used for dismantling, the following great difficulties are caused:
first, joists are large in size and weight (about 100t weight per joist), and the transportation, disassembly and storage are very cumbersome.
Secondly, the joist is fixed under the girder and detached, so that high-altitude operation is required, the danger coefficient is high, and the workload is high.
Thirdly, if the hanging beam is adopted for hanging, the final hanging tonnage of the main beam system (comprising an upper trolley assembly, a lower trolley assembly, a maintenance crane, electrical equipment and the like) is increased by about 250T, so that the hanging tonnage reaches 2850T, the hanging distance is 53m, and the hanging limit (arm amplitude and tonnage) of the user floating crane equipment is exceeded, so that the upper trolley assembly, the lower trolley assembly and the maintenance crane are required to be independently hung, and the project total assembly cost is greatly increased.
How to complete the manufacturing and final assembly tasks of a large-span gantry crane with high quality, zero accidents, safety and science in a short time is one of the problems to be solved in the field.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a method for lifting a gantry crane girder by a lifting lug and a corresponding gantry crane girder.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a method for lifting a gantry crane girder by a lifting lug comprises the following steps: step 1, integrally manufacturing lifting lugs on a main beam; step 2, balancing the main beam and adjusting the gravity center of the main beam; step 3, hanging the main beam to the high altitude, swinging the main beam under the action of wind power, and adjusting and stabilizing the main beam through a wind rope; and 4, configuring a girder hoisting rigging.
Further, the method also comprises a step 5 of installing a temporary process track on the original gantry crane track and paving a foundation so as to shorten the distance between the longitudinal center of the gantry crane girder and the coastline.
Further, the method also comprises a step 6 of connecting and installing the main beam and the flexible legs in a fixed plate sleeved connection mode.
Further, the lifting lug main board of the main beam is in butt joint with the partition board in the box body, 4 main hooks on the front, back, left and right of the floating crane are utilized for lifting, the floating crane is opened by 9m, and the deflection angle is not more than 15 degrees.
Further, 16 plug-in lifting lugs are arranged on the main beam.
Further, 1 set of maintenance crane, 1 upper trolley and 1 lower trolley are arranged on the main beam to be used as counterweights.
In order to achieve the above purpose, the present invention further adopts the following technical scheme:
the gantry crane girder, characterized in that: the girder includes lug mainboard and box, and the interior baffle butt joint of lug mainboard and box sets up a plurality of lugs on the girder, and the floating crane is connected to the lug, the floating crane is opened shelves 9m, and the off-angle is no more than 15. And the main beam is also provided with 1 set of maintenance crane, 1 upper trolley and 1 lower trolley serving as counterweights for adjusting the gravity center of the main beam.
Further, the number of lifting lugs is 16, and the model of the lifting lugs is 200T plug-in lifting lugs.
Further, 250T wave wind lifting lugs are arranged at the sea measuring surfaces at the two ends of the main beam.
Further, the main beam is connected with the flexible legs in a sleeved mode.
In the technical scheme, the method for lifting the gantry crane girder by the lifting lug and the corresponding gantry crane girder solve the assembly problems of large size and heavy weight and have low installation risk.
Drawings
FIG. 1 is a flow chart of a method of lifting a girder of a gantry crane with lifting lugs according to the present invention;
FIG. 2 is a schematic illustration of a gantry crane main beam hoist of the present invention;
fig. 3 is a schematic structural view of the wave wind lifting lug of the invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Aiming at the problems of geographical position condition limitation of shipyard and approaching of floating crane equipment to the lifting limit, the general thought of the method for lifting the girder of the gantry crane by the lifting lug is to lift by adopting a lifting lug mode, the lifting lug 5 and the girder 1 are integrally designed, 16 inserted lifting lugs are arranged on the girder 1, a lifting lug main board is in butt joint with a baffle in a box body, and 4 main hooks of the floating crane are utilized for lifting.
Referring to fig. 1 and 2, the invention firstly discloses a method for lifting a girder of a gantry crane by a lifting lug, which mainly comprises the following steps:
s1: lifting lugs are integrally formed on the main beams.
The lifting scheme is characterized in that lifting lugs are adopted for lifting, the lifting lugs 5 and the main beam 1 are integrally designed, 16 200T plug-in lifting lugs 5 are arranged on the main beam 1, the inner partition plates of the main plate box body of the lifting lugs are in butt joint, and 4 main hooks in front and back of the floating crane are utilized for lifting.
In the invention, as the lifting lug 5 and the main beam 1 are integrally designed, the joist manufacturing is omitted, the overhead operation of removing the joist during final assembly is omitted, and the time of traffic is saved. Compared with the traditional joist hoisting scheme, the invention has the following cost saving: the joist scheme comprises 2 joists, wherein each joist has a weight of about 100 tons, 15 tons of internal reinforcement of the main girder 1 and about 35 tons of anti-overturning devices, shear blocks and the like, and a steel structure of about 250 tons is required to be manufactured; by adopting the lifting lug scheme, the weight of the lifting lug 4 is added to the inside of the main beam 1 to strengthen about 40 tons, and the light steel structure can save (250-40) 5500=115.5 ten thousand yuan according to the calculation of about 5500 yuan per ton of steel structure (material cost added labor). In addition, the labor and equipment use cost (estimated to be more than 300 ten thousand) of transportation, disassembly and assembly of the joist is saved. And the cost, the safety risk and the field operability are comprehensively considered, a scheme II is finally adopted, and the main beam assembly is carried out in a lifting lug mode, so that the follow-up portal crane disassembly requirements of customers are met, and the huge cost is saved.
S2: and (5) weighting the main beam and adjusting the gravity center of the main beam.
Through calculation, the invention determines that 1 set of maintenance crane 2, 1 upper trolley 3 and 1 lower trolley 4 are arranged on the main beam 1 and used as balance weights to adjust the gravity center, and the upper trolley and the lower trolley are assembled to the appointed position by using the floating crane for binding and fixing, so that the position of the gravity center of the main beam 1 is in a stable lifting state.
S3: hanging the girder to the high altitude, swinging the girder by utilizing the wind force effect, and adjusting and stabilizing the girder through a wave rope.
250T wave wind lifting lugs are arranged on sea surface measuring surfaces at two ends of the girder 1, and a winch on a floating crane hull is used for connecting the wave wind lifting lugs when the girder 1 is hoisted. After the girder 1 is hung to the high altitude, the girder 1 swings under the action of wind force, the girder 1 is stably regulated through a wind rope, and the fine adjustment function can be realized when the hanging girder 1 is connected with rigid and flexible legs.
S4: and configuring a girder hoisting rigging.
Firstly, a main beam 1 is installed to hoist a wave wind lifting lug, and after the main beam 1 is lifted to the high altitude, the main beam 1 swings under the action of wind power, and the main beam 1 is stably adjusted through a wave wind rope.
In the invention, the main girder 1 and the wind rope are connected by the hanging lugs mainly depending on the wind, so the strength of the hanging lugs is a key technical index of the invention. As shown in FIG. 3, the yield limit sigma is calculated according to the maximum bearing 200T of the lifting lug in the assembly s =345 MPa, safety factor n=2.
；
Wherein,
wherein [ sigma ]]＝0.6*0.7σ s ＝0.42σ s 。
Wherein [ Γ ]]＝0.675σ s 。
And the main beam hoisting rigging is configured, so that the requirements of various technical parameters such as the hoisting height, the hoisting load and the like of the floating crane are met. As one implementation mode of the invention, the left hook head and the right hook head of the first floating crane are opened 22m, the deflection angle is required to be not more than 2 degrees, the second floating crane is opened 9m, and the deflection angle is required to be not more than 15 degrees. Therefore, the installation angle of the lifting lug is critical, the lifting lug is matched with the lifting lockset, and the lifting diagram is accurately calculated and drawn.
The main beam hoisting rigging is reasonably configured, the requirements of various technical parameters such as 5000T floating crane, 3600T floating crane lifting height, lifting load and the like are met, the requirement of a deflection angle is not more than 15 degrees, hoisting steel wire ropes are folded by phi 156 x 22m and are connected and hoisted through 200T/300T shackles (8 groups in total), the requirement of the deflection angle is not more than 2 degrees, the hoisting steel wire ropes are folded by phi 152 x 22 m/phi 115 x 22m and are connected and hoisted through 200T shackles (8 groups in total). Therefore, in the invention, the installation angle of the lifting lug is critical, the lifting lug is matched with the lifting lockset, and the lifting diagram is accurately calculated and drawn.
S5: and installing a temporary process track on the original gantry crane track, and paving a foundation so as to shorten the distance between the longitudinal center of the gantry crane main beam and the coastline.
Because the rigid leg rails of the gantry crane are shorter, and the end parts are far away from the coastline, the invention is characterized in that 30m temporary process rails are arranged on the original rigid leg rails in a butt joint way, a firm foundation is paved, the distance between the longitudinal center of the main beam 1 of the gantry crane and the coastline is shortened to 53m, and in addition, the side car stops of the flexible legs are removed, so that the limit of the lifting capacity of the 3600T floating crane is relieved.
S6: the girder and the flexible legs are connected and installed in a sleeved connection mode by the fixing plate.
In order to enable the main beam to be connected and installed with the flexible legs quickly and smoothly, the invention innovates and improves the flexible hinge, adopts the fixing plate to be sleeved and connected, and reduces the work load of high-altitude operation.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (2)
1. The method for lifting the girder of the gantry crane by the lifting lug is characterized by comprising the following steps of:
step 1, integrally manufacturing lifting lugs on a main beam,
the number of the lifting lugs is 16, and the model of the lifting lugs is 200T plug-in lifting lugs;
step 2, balancing the main beam and adjusting the gravity center of the main beam;
step 3, hanging the girder to the high altitude, swinging the girder by utilizing the wind force, adjusting and stabilizing the girder by a wind rope,
250T wave wind lifting lugs are arranged on sea measuring surfaces at two ends of the main beam, and a winch on a floating crane hull is used for connecting the wave wind lifting lugs when the main beam is hoisted;
step 4, configuring a main girder hoisting rigging,
2. the method of lifting a girder of a gantry crane with lifting lugs according to claim 1, wherein:
the main beam is provided with 1 set of maintenance crane, 1 upper trolley and 1 lower trolley as balance weights to adjust the gravity center of the main beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013772.7A CN108249286B (en) | 2018-01-08 | 2018-01-08 | Method for lifting gantry crane girder by lifting lugs and gantry crane girder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013772.7A CN108249286B (en) | 2018-01-08 | 2018-01-08 | Method for lifting gantry crane girder by lifting lugs and gantry crane girder |
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| Publication Number | Publication Date |
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| CN108249286A CN108249286A (en) | 2018-07-06 |
| CN108249286B true CN108249286B (en) | 2023-11-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318769A (en) * | 2012-07-16 | 2013-09-25 | 上海振华重工(集团)股份有限公司 | Shipyard gantry crane with upper dolly provided with lifting device |
| CN203959697U (en) * | 2014-05-30 | 2014-11-26 | 中建七局安装工程有限公司 | The equalizing bar of hoisting platform truss |
| CN105060093A (en) * | 2015-07-03 | 2015-11-18 | 上海振华重工(集团)股份有限公司 | Integral hoisting method of front and rear crossbeam assemblies of quayside container crane |
| CN207918276U (en) * | 2018-01-08 | 2018-09-28 | 上海振华重工(集团)股份有限公司 | A kind of gantry crane girder |
-
2018
- 2018-01-08 CN CN201810013772.7A patent/CN108249286B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103318769A (en) * | 2012-07-16 | 2013-09-25 | 上海振华重工(集团)股份有限公司 | Shipyard gantry crane with upper dolly provided with lifting device |
| CN203959697U (en) * | 2014-05-30 | 2014-11-26 | 中建七局安装工程有限公司 | The equalizing bar of hoisting platform truss |
| CN105060093A (en) * | 2015-07-03 | 2015-11-18 | 上海振华重工(集团)股份有限公司 | Integral hoisting method of front and rear crossbeam assemblies of quayside container crane |
| CN207918276U (en) * | 2018-01-08 | 2018-09-28 | 上海振华重工(集团)股份有限公司 | A kind of gantry crane girder |
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