CN115010010A - Method for integrally hoisting rear girder and machine room assembly of bridge ship unloader - Google Patents

Method for integrally hoisting rear girder and machine room assembly of bridge ship unloader Download PDF

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Publication number
CN115010010A
CN115010010A CN202210811170.2A CN202210811170A CN115010010A CN 115010010 A CN115010010 A CN 115010010A CN 202210811170 A CN202210811170 A CN 202210811170A CN 115010010 A CN115010010 A CN 115010010A
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China
Prior art keywords
assembly
hoisting
machine room
rear girder
lifting
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Pending
Application number
CN202210811170.2A
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Chinese (zh)
Inventor
李恭川
褚金川
纪建卫
赵禹
范德进
朱萍萍
唐伟
杨永春
李路路
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Shanghai Zhenghua Heavy Industries Co Ltd
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Shanghai Zhenghua Heavy Industries Co Ltd
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Priority to CN202210811170.2A priority Critical patent/CN115010010A/en
Publication of CN115010010A publication Critical patent/CN115010010A/en
Pending legal-status Critical Current

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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
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/06—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements
    • B66C23/08—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
    • B66C23/10—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
    • 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
    • B66C13/18—Control systems or devices
    • B66C13/22—Control systems or devices for electric drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Jib Cranes (AREA)

Abstract

The invention discloses a method for integrally hoisting a rear girder and a machine room assembly of a bridge ship unloader, which comprises the following steps: s1, completing the installation of the rear girder assembly at the low-altitude position; s2, after arranging the machine room components on the ground, hoisting the machine room components to the upper side of the rear girder component for installation; s3, calculating the gravity center position and the distributed load of the whole body of the rear girder assembly and the machine room assembly after installation, and obtaining the type and the installation position of a hoisting lug; s4, after the hoisting lifting lug is installed, selecting a hoisting tool and a gantry crane to hoist the whole body of the rear girder assembly and the machine room assembly to the installation position. The invention solves the difficulties and disadvantages of the prior art by optimizing the general assembly process flow and mode.

Description

Method for integrally hoisting rear crossbeam and machine room assembly of bridge ship unloader
Technical Field
The invention relates to a large-scale equipment assembly technology, in particular to a method for integrally hoisting a rear girder and a machine room assembly of a bridge ship unloader.
Background
The traditional bridge grab ship unloader is restricted by the structural form, has larger lifting tonnage and can select a limited hoisting point position, so that the traditional assembly mode of the rear girder and the machine room is that the machine room components need to be pre-assembled with the rear girder components on the ground in advance, the machine room and the rear girder are disassembled after the pre-assembly, and the machine room components are hoisted in place after the assembly of the rear girder and the doorframe assembly is finished. According to the scheme, the machine room needs to be hoisted for multiple times, and needs to be positioned at high altitude and installed with the support connecting bolt, so that the defects of low working efficiency, high equipment occupancy rate, long final assembly period and the like exist.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for integrally hoisting a rear girder and a machine room component of a bridge ship unloader, which solves the difficulties and the defects in the prior art by optimizing the process flow and the mode of final assembly.
In order to realize the purpose, the invention adopts the following technical scheme:
a method for integrally hoisting a rear girder and a machine room assembly of a bridge ship unloader comprises the following steps:
s1, completing the installation of the rear girder assembly at the low-altitude position;
s2, after arranging the machine room components on the ground, hoisting the machine room components to the upper side of the rear girder component for installation;
s3, calculating the gravity center position and the distributed load of the whole body of the rear girder assembly and the machine room assembly after installation, and obtaining the type and the installation position of a hoisting lug;
s4, after the hoisting lifting lug is installed, selecting a hoisting tool and a gantry crane to hoist the whole body of the rear girder assembly and the machine room assembly to the installation position.
Preferably, the step S3 further includes:
s31, calculating the gravity center position and the distributed load of the whole body after the rear girder assembly and the machine room assembly are installed by adopting a finite element model, selecting the installation position of a lifting point to draw a lifting diagram, and determining that the lifting mode of the rear girder assembly and the machine room assembly accords with the load curve of a gantry crane according to the arrangement of a general assembly site;
s32, selecting hoisting lugs according to the weight distribution of the rear girder assembly and the machine room assembly, and calculating the structural strength of the hoisting lugs;
s33, adjusting the positions of the rear girder assembly and each small piece in the machine room assembly, and optimizing a hoisting diagram;
and S34, checking and calculating the stress of the hoisting lifting lug, the deformation of each component and the load capacity of the gantry crane according to the hoisting diagram.
Preferably, the finite element model uses BEAM44 cells and MASS21 cells.
Preferably, the finite element model adopts a 1.2 times amplification factor; namely, it is
The gravity acceleration g of the whole body installed by the rear girder assembly and the machine room assembly is 1.2 multiplied by 9.8kg/m 3 。
Preferably, the rear girder assembly is provided with an inserted hoisting lug.
Preferably, in step S3, the types and mounting positions of the hoisting lugs are obtained as follows:
step a, firstly calculating the weight and the gravity center of each single assembly one by one, then setting the end part of the girder as a reference point, and then calculating the gravity center and the weight of the integral hoisting assembly according to the gravity center and the weight of each single assembly: weight x moment arm is moment;
b, after a result of the calculation of the gravity center position of the whole assembly is obtained, shifting the gravity center position to two sides, and finding out a proper lifting lug installation position on the rear girder structure;
calculating the stress size of each lifting lug, namely the distributed load according to the distances L1 and L2 from the lifting lugs at two sides to the gravity center position: f1+ F2 is G, F1 is L1 is F2 is L2, F1 and F2 are stress of lifting lugs, G is the total weight of the assembly, and then the structural form of the lifting lugs and the model of a proper lifting rigging are designed according to the distribution loads of lifting points F1 and F2.
The method for integrally hoisting the rear girder and the machine room assembly of the bridge ship unloader has the following beneficial effects:
1) the total assembly period is effectively shortened, and precious time and wealth are saved;
2) the hoisting frequency of the machine room is reduced, the hoisting workload and the use frequency of the gantry crane are effectively reduced, and the situation of tension use of hoisting equipment is relieved;
3) the machine room is assembled in place after the rear girder is lifted, so that the risk of a large number of personnel entering high-altitude cross operation is reduced, and the operation efficiency of workers is effectively improved;
4) the rear girder component and the machine room are integrally assembled, so that the actual load capacity of the gantry crane is improved to the maximum extent, and the service efficiency of the gantry crane can be obviously improved;
5) the ground bed-jig does not need to be placed after the machine room is hoisted once, so that the use times of the field can be obviously saved, and the use pressure of the field can be relieved.
Drawings
FIG. 1 is a schematic flow chart of a method for integrally hoisting a rear girder and a machine room assembly according to the invention;
FIG. 2 is a schematic diagram of step S in the method for integrally hoisting the rear girder and the machine room assembly according to the invention;
FIG. 3 is a schematic diagram of step S in the method for integrally hoisting the rear girder and the machine room assembly according to the present invention;
fig. 4 is a schematic top view of fig. 3.
Detailed Description
In order to better understand the technical solutions of the present invention, the following further describes the technical solutions of the present invention with reference to the accompanying drawings and examples.
Referring to fig. 1, the method for integrally hoisting the rear girder and the machine room assembly of the bridge ship unloader provided by the invention comprises the following steps:
s1, completing the installation of the rear girder assembly 100 at a low-altitude position, mainly installing the components such as the ladder-shaped frame, the main trolley, the rope supporting trolley, the cab, the ladder platform, the front pull rod, the safety hook and the like and accessories thereof in place;
s2, arranging the machine room components 200 on the ground, mainly installing the pitching mechanism, the lifting mechanism, the electric control cabinet, the indoor maintenance crane, the ladder platform and other accessories in place, hoisting the accessories to the upper part of the rear girder component 100 for installation, as shown in FIG. 2;
and S3, calculating the gravity center position and the distributed load of the whole body after the rear girder assembly 100 and the machine room assembly 200 are installed, and obtaining the type and the installation position of the hoisting lug 300. The hoisting lugs 300 and the main beam of the rear girder assembly 100 are integrally arranged, four inserted hoisting lugs 300 are installed on the main beam, and the main plate of the hoisting lugs 300 is butted with the box web plate of the main beam;
s4, after the lifting lug 300 to be hoisted and all the components and accessories are installed, selecting hoisting tools (a steel wire rope 1, a shackle and the like) and two gantry cranes 2 to integrally hoist the rear girder component 100 and the machine room component 200 to the installation position.
The step S3 further includes:
s31, calculating the gravity center position and the distributed load of the whole body after the rear girder assembly 100 and the machine room assembly 200 are installed by adopting a finite element model, selecting the installation position of a lifting point to draw a lifting picture, and determining that the lifting mode of the rear girder assembly 100 and the machine room assembly 200 accords with the load curve of a gantry crane according to the arrangement of a final assembly site;
s32, selecting the hoisting lug 300 according to the weight distribution of the rear girder assembly 100 and the machine room assembly 200, calculating the structural strength of the hoisting lug 300, and ensuring that the hoisting deformation of the assembly is in a controllable range;
s33, adjusting the positions of all small pieces in the girder assembly 100 and the machine room assembly 200, optimizing a hoisting diagram, and designing a hoisting tool;
and S34, checking and calculating the stress of the hoisting lifting lug 300, the deformation of each component and the load capacity of the gantry crane 2 according to the hoisting diagram.
And establishing a finite element model according to the whole body of the rear girder assembly 100 and the machine room assembly 200 after the rear girder assembly is installed, wherein the finite element model adopts a BEAM44 unit and a MASS21 unit.
The self weight of the whole body of the rear girder assembly 100 and the machine room assembly 200 is 745T after the rear girder assembly 100 and the machine room assembly 200 are installed, the assemblies of the machine room, the lifting opening and closing mechanism, the pitching mechanism, the main trolley, the cab and the like are added to corresponding positions in a form of mass points, and during calculation, a finite element model adopts a 1.2 times amplification factor, so that the gravity acceleration g of the whole body of the rear girder assembly 100 and the machine room assembly 200 is 1.2 multiplied by 9.8kg/m 3 。
In step S3, the types and mounting positions of the lifting lugs are obtained as follows:
step a, firstly calculating the weight and the gravity center of each single assembly one by one, then setting the end part of the girder as a reference point, and then calculating the gravity center and the weight of the integral hoisting assembly according to the gravity center and the weight of each single assembly: weight x moment arm is moment;
b, after a result of the calculation of the gravity center position of the whole assembly is obtained, shifting the gravity center position to two sides, and finding out a proper lifting lug installation position on the rear girder structure;
calculating the stress size of each lifting lug, namely the distributed load according to the distances L1 and L2 from the lifting lugs at two sides to the gravity center position: f1+ F2 is G, F1 is L1 is F2 is L2, F1 and F2 are stress of lifting lugs, G is the total weight of the assembly, and then the structural form of the lifting lugs and the model of a proper lifting rigging are designed according to the distribution loads of lifting points F1 and F2.
The installation of lug position needs to consider: (1) the mounting position of the lifting lug needs to avoid the position of the piece joint of the component; (2) and the suspension cable and the shackle are configured in place according to the position of the lifting lug and then are not allowed to interfere with the whole assembly.
According to the data, the maximum stress of the rear girder assembly 100 structure is 170MP, the large stress of the hoisting lug 300 and the nearby steel structure is 164MPa, and according to the analysis, the steel structure strength of the hoisting lug 300 and the ship unloader meets the integral hoisting scheme.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims (6)

1. A method for integrally hoisting a rear girder and a machine room component of a bridge ship unloader is characterized by comprising the following steps:
s1, completing the installation of the rear girder assembly at the low-altitude position;
s2, after arranging the machine room components on the ground, hoisting the machine room components to the upper side of the rear girder component for installation;
s3, calculating the gravity center position and the distributed load of the whole body of the rear girder assembly and the machine room assembly after installation, and obtaining the type and the installation position of a hoisting lug;
s4, after the hoisting lifting lug is installed, selecting a hoisting tool and a gantry crane to hoist the whole body of the rear girder assembly and the machine room assembly to the installation position.
2. The method for integrally hoisting the rear girder and the machine room assembly of the bridge ship unloader as set forth in claim 1, wherein the step S3 further comprises:
s31, calculating the gravity center position and the distributed load of the whole body after the rear girder assembly and the machine room assembly are installed by adopting a finite element model, selecting the installation position of a lifting point to draw a lifting diagram, and determining that the lifting mode of the rear girder assembly and the machine room assembly accords with the load curve of a gantry crane according to the arrangement of a general assembly site;
s32, selecting hoisting lugs according to the weight distribution of the rear girder assembly and the machine room assembly, and calculating the structural strength of the hoisting lugs;
s33, adjusting the positions of the rear girder assembly and each small piece in the machine room assembly, and optimizing a hoisting diagram;
and S34, checking and calculating the stress of the hoisting lifting lug, the deformation of each component and the load capacity of the gantry crane according to the hoisting diagram.
3. The method for integrally hoisting the rear girder and the machine room assembly of the bridge ship unloader according to claim 2, wherein: the finite element model employs BEAM44 cells and MASS21 cells.
4. The method for integrally hoisting the rear girder and the machine room assembly of the bridge ship unloader according to claim 2, wherein: the finite element model adopts 1.2 times of amplification factor; namely, it is
The gravity acceleration g of the whole body installed by the rear girder assembly and the machine room assembly is 1.2 multiplied by 9.8kg/m 3 。
5. The method for integrally hoisting the rear girder and the machine room assembly of the bridge ship unloader according to claim 2, wherein: and the rear girder assembly is provided with an inserted hoisting lug.
6. The method for integrally hoisting the rear girder and the machine room assembly of the bridge ship unloader according to claim 2, wherein in the step S3, the types and the installation positions of the hoisting lugs are obtained as follows:
step a, firstly calculating the weight and the gravity center of each single assembly one by one, then setting the end part of the girder as a reference point, and then calculating the gravity center and the weight of the integral hoisting assembly according to the gravity center and the weight of each single assembly: weight x moment arm is moment;
b, after a result of the calculation of the gravity center position of the whole assembly is obtained, shifting the gravity center position to two sides, and finding out a proper lifting lug installation position on the rear girder structure;
calculating the stress size of each lifting lug, namely the distributed load according to the distances L1 and L2 from the lifting lugs at two sides to the gravity center position: f1+ F2 is G, F1 is L1 is F2 is L2, F1 and F2 are stress of lifting lugs, G is the total weight of the assembly, and then the structural form of the lifting lugs and the model of a proper lifting rigging are designed according to the distribution loads of lifting points F1 and F2.
CN202210811170.2A 2022-07-11 2022-07-11 Method for integrally hoisting rear girder and machine room assembly of bridge ship unloader Pending CN115010010A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210811170.2A CN115010010A (en) 2022-07-11 2022-07-11 Method for integrally hoisting rear girder and machine room assembly of bridge ship unloader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210811170.2A CN115010010A (en) 2022-07-11 2022-07-11 Method for integrally hoisting rear girder and machine room assembly of bridge ship unloader

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CN115010010A true CN115010010A (en) 2022-09-06

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