CN110902560B - Assembling process for girder of ultra-large track crane - Google Patents
Assembling process for girder of ultra-large track crane Download PDFInfo
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- CN110902560B CN110902560B CN201911119816.5A CN201911119816A CN110902560B CN 110902560 B CN110902560 B CN 110902560B CN 201911119816 A CN201911119816 A CN 201911119816A CN 110902560 B CN110902560 B CN 110902560B
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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
- B66C6/00—Girders, or track-supporting structures, specially adapted for cranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
Abstract
The invention relates to an assembling process of a girder of an ultra-large type track crane, which is mainly carried out in a way of sectional type conveying and mounting after integral layout, wherein the integral layout mainly comprises field selection, marking and jig frame arrangement; the sectional type transporting and installing sequentially comprises main beam arrangement, end beam welding, upper supporting leg door frame installation, brace rod assembly installation, pull rod support installation, process support installation, lower structure installation, rail arrangement and auxiliary structure installation. The invention has the advantages that: the assembling process of the girder of the ultra-large type track crane adopts the mode of sectional transportation and installation after integral layout for assembling, has reasonable layout, can reduce the hoisting times compared with the prior art, further reduces the labor intensity, simultaneously can improve the assembling efficiency, can effectively avoid the deviation of each supporting piece on the girder in the integral hoisting process, and greatly ensures the assembling quality of the girder of the ultra-large type track crane.
Description
Technical Field
The invention belongs to the technical field of rail crane installation, and particularly relates to an assembling process of a girder of an ultra-large rail crane.
Background
With the development of inland China, the transportation industry develops rapidly, the transportation along rivers and railways is prosperous, a large number of containers are transported to the inland, and the requirements of each container yard on the rail type container crane are more and more increased.
The rail container crane (referred to as a rail crane for short) has a large weight and size, and all components are required to meet the quality detection requirement in order to be completely installed in place. The girder is an important component of the rail crane, and when the existing girder is assembled, all the components are hoisted and installed in the field, and then the whole body is hoisted, so that the girder needs to be hoisted for many times, and time and labor are consumed; in addition, in the integral hoisting process, the hoisting tool may cause the deviation of each supporting piece on the main beam, and further the integral quality control of the main beam is influenced.
Therefore, it is very necessary to develop a girder assembling process of an ultra-large rail crane, which can reduce labor intensity, improve assembling efficiency and ensure high quality of girders.
Disclosure of Invention
The invention aims to solve the technical problem of providing the assembling process of the girder of the ultra-large track crane, which can reduce the labor intensity, improve the assembling efficiency and ensure the high quality of the girder.
In order to solve the technical problems, the technical scheme of the invention is as follows: the super-large type rail crane girder assembling process has the innovation points that: the assembly process is mainly carried out in a mode of sectional type transportation and installation after integral layout,
the overall layout mainly comprises field selection, marking and jig frame arrangement;
the sectional type transporting and installing sequentially comprises main beam arrangement, end beam welding, upper supporting leg door frame installation, brace rod assembly installation, pull rod support installation, process support installation, lower structure installation, rail arrangement and auxiliary structure installation.
Further, the assembly process comprises the following specific steps:
step 1: overall layout:
(1) selecting a field: selecting a field with a hard foundation as an assembling field, and then cleaning up sundries on the assembling field to ensure that the assembling field is smooth;
(2) scribing: firstly, drawing a girder symmetrical center line on the ground of an assembly site by using a laser theodolite, then drawing a girder center line by taking the girder symmetrical center line as a reference, and sequentially drawing a support leg center line, an end beam center line and a jig frame arrangement center line;
(3) the jig frame is arranged: arranging a standardized girder assembling jig frame according to a jig frame arrangement central line on an assembling site, namely arranging a 1.5m cylindrical assembling jig frame and a 3m cylindrical assembling jig frame in place, and after the jig frame is arranged, correcting the jig frame to be horizontal by laser;
step 2: and (3) sectional type conveying and mounting:
(1) arranging a main beam: arranging a main beam on a 1.5m cylinder assembling jig frame, then correcting the horizontal position by using laser and a jack, ensuring that the placing position of the 1.5m cylinder assembling jig frame is aligned with an inner diaphragm plate of the main beam, and hanging a centering line by using a plumb bob, so that the central line of the main beam is aligned with a central line drawn on the ground, and ensuring the opening size of the main beam, the central size of a supporting leg and the diagonal size;
(2) assembling and welding end beams: respectively placing the end beams in parallel at the central line marked on the ground, leveling by using laser, and trimming the margins at the two ends of the end beams according to the actual condition; then, moving the two end cross beams in place respectively to enable the end beams of the trapezoidal box structure to be located at two ends of the main beam, using a plumb bob to hoist the center, enabling the center line of the end beam to be aligned with the center line of the end beam scribed on the ground, ensuring that the end beams are aligned and correcting the horizontal; then, welding a connecting welding seam between the main beam and the end beam as required, carrying out 100% test on the welding seam without damaging UT, and finally removing the 3m cylinder assembly jig frame at the end part;
(3) installing an upper landing leg door frame: according to the central line of the support leg marked on the ground, symmetrically adding 1.5m cylinders to assemble a jig frame at the side part of a main beam, then marking a mounting line of an upper support leg door frame on the main beam, hoisting the upper support leg door frame according to the marked mounting line of the upper support leg door frame and drawing a cable wire rope, then adjusting the relative positioning size of the upper support leg door frame and the main beam, adjusting a pair rib, and welding the upper support leg door frame according to requirements;
(4) and (3) installing a support rod assembly: hoisting the V-shaped stay bar assembly to the main beam, adjusting the center of the V-shaped stay bar assembly to coincide with the center of the span, fixing the end part of the V-shaped stay bar assembly and the inserting plate on the main beam in a spot welding manner after the adjustment is qualified, wherein the length of the spot welding fixed welding line is more than or equal to 100mm, and pulling the cable rope as required;
(5) and (3) mounting a pull rod: hoisting a first pull rod to a position between an upper landing leg door frame and a support rod assembly, connecting the upper end of the first pull rod with an upper crossbeam connecting assembly of the upper landing leg door frame by using a pin shaft, adjusting a first pull rod eccentric sleeve, connecting the lower end of the first pull rod with a central node plate of a V-shaped support rod assembly by using the pin shaft, performing carbon planing on a discontinuous welding seam of the lower end of the support rod aligned with the first pull rod in the support rod assembly when the eccentric sleeve is not adjusted in place, fine adjusting the lower end of the support rod by using a chain block after the welding seam is removed, and simultaneously adjusting the eccentric sleeve of the lower end of the first pull rod to ensure that the lower end of the first pull rod can be subjected to shaft assembly and the support rod of the support rod assembly is subjected to spot; hoisting a second pull rod to a position between the upper landing leg door frame and the end beam, connecting the upper end of the second pull rod with an upper cross beam connecting assembly of the upper landing leg door frame by using a pin shaft, and fixing the lower end of the second pull rod with a plug board on the end beam in a spot welding manner;
(6) the pull rod is supported and installed: marking a pull rod support installation line on the main beam according to the central line of the V-shaped support rod assembly, hoisting the doorframe-type pull rod support according to the marking line, drawing a cable wind steel wire rope, adjusting the pair of the pull rod support and the main beam, and then completing welding according to requirements to enable the pull rod support to form external supports for all pull rods on the main beam; then, adjusting the level by using a jack, and keeping the girders at the two sides in a free state to ensure the straightness, the camber, the height difference, the track gauge and the central line and the diagonal dimension of the support leg;
(7) mounting a process support: hoisting the two process supports to the inner side of a main beam between the upper landing leg door frame and the pull rod support respectively, moving the process supports to be close to the upper landing leg door frame according to a pre-welded flange component on the inner side of the main beam, and connecting the process support truss component with the flange component pre-welded on the inner side of the main beam through bolts after the process supports are moved in place;
(8) installing a lower structure: lifting a main beam assembly by using a floating crane, marking a lower structure mounting line on the main beam, hoisting the lower structure in place according to the marking line, arranging a 3.7m cylindrical jig frame, adjusting the lower structure and main beam alignment ribs by using a jack and a chain block, and ensuring the track gauge of a large truck and the opening of the center of a supporting leg; adjusting the level by using a jack, keeping the girders on the two sides in a free state, and retesting the straightness, camber, height difference, gauge, central line of the supporting leg and diagonal dimension of the supporting rail;
(9) rail arrangement: integrally marking, roughly arranging trolley tracks, ensuring that the height difference of the top of the tracks at the track interface is +/-0.5 and cannot exceed 1mm within the range of 2m, ensuring that the straightness of the trolley tracks does not exceed 6mm within the full-length range and needs to be bent inwards, and ensuring that the deviation between the track center and the central line of a track bearing beam is not more than 5 mm;
(10) and (3) auxiliary structure installation: and a ladder platform, a trolley buffer and a cable towing order are arranged on the main beam to complete the assembly of the girder of the ultra-large rail crane.
Further, after the main beam is arranged in the step 2, the height difference of the jacking horizontal zero position of the main beam is not more than +/-1.5 mm, the inner side of the central line of the supporting leg is provided with 0-5mm of inward bending and cannot have sudden change, and the diagonal tolerance | K1-K2 | of the supporting leg is not more than 5 mm.
Furthermore, after the pull rod support is installed in the step 2, the camber of the girder is 1.1-1.3S, the inner side of the central line of the supporting leg has 0-5mm of inward bending and cannot have sudden change, the outer side of the central line of the supporting leg has 0-5mm of outward bending, the tolerance | K1-K2 | of the diagonal line of the supporting leg is less than or equal to 5mm, the straightness of the two girder supporting rails is less than or equal to 6mm, and the height difference of the jacking horizontal zero points of the girder is less than or equal to +/-1.5 mm.
Further, in the installation of the process support in the step 2, the process support comprises two main rods arranged in parallel and a plurality of connecting rods which are fixedly connected with the two main rods and are of a wave-shaped structure, and the connecting rod support perpendicular to the main rods is further arranged at the centers of the two adjacent connecting rods.
Furthermore, after the lower structure is installed in the step 2, when the process is repeated, a section of process support is loosened, and the process support is reconnected after the repeated measurement is finished.
The invention has the advantages that:
(1) according to the assembling process of the girder of the ultra-large type track crane, the girder is assembled in a manner of sectional transportation and installation after integral layout, the layout is reasonable, compared with the original process, the hoisting times can be reduced, the labor intensity is further reduced, meanwhile, the assembling efficiency can be improved, the deviation of each support piece on the girder in the integral hoisting process can be effectively avoided, and the assembling quality of the girder of the ultra-large type track crane is greatly ensured;
(2) according to the assembling process of the ultra-large rail crane girder, the sectional type conveying and mounting adopts an assembling sequence from bottom to top and then reinforcement to bottom, so that stable connection among all the parts can be ensured, and meanwhile, the assembling precision of all the parts can be ensured by controlling all process parameters; in addition, the assembly jig frame is added or removed according to the on-site assembly requirement, so that the flexibility of the assembly process is greatly embodied;
(3) according to the assembling process of the ultra-large rail crane girder, the original frame type is changed into the sheet type by the used process support, four flange plates are reduced after the improvement, so that the installation workload of bolts is reduced, the installation difficulty of the support rod is reduced, and the use is convenient.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic drawing of ground scribing in the assembling process of a girder of an ultra-large type rail crane.
Fig. 2 is a schematic diagram of the arrangement of the tire frames in the assembling process of the girder of the ultra-large track crane.
Fig. 3-8 are sectional type conveying and mounting flow charts in the assembling process of the girder of the ultra-large type track crane.
Fig. 9 is a schematic structural diagram of a process support in the assembling process of the girder of the ultra-large track crane.
Detailed Description
The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.
Examples
This super-large track crane girder of embodiment assembles technology, and this assembly technology mainly adopts the mode that the installation was transported to segmentation after the overall arrangement, and is rationally distributed, compares with original technology, can reduce the hoist and mount number of times, and then reduces intensity of labour, simultaneously, also can improve and assemble efficiency, and can effectively avoid each support piece's skew on the integral hoisting in-process girder, guarantees greatly that super-large track crane girder assembles the quality, and concrete step is as follows:
step 1: overall layout:
(1) selecting a field: selecting a field with a hard foundation as an assembling field, and then cleaning up sundries on the assembling field to ensure that the assembling field is smooth;
(2) scribing: as shown in fig. 1, firstly, drawing a girder symmetric central line 1 on the ground of an assembly site by using a laser theodolite, then drawing a girder central line 2 by taking the girder symmetric central line 1 as a reference, and sequentially drawing a support leg central line 3, an end beam central line 4 and a jig arrangement central line;
(3) the jig frame is arranged: as shown in fig. 2, standardized girder assembling jig frames are arranged according to the jig frame arrangement center line on the assembling site, namely, a 1.5m cylinder assembling jig frame 5 and a 3m cylinder assembling jig frame 6 are arranged in place, and after the jig frames are arranged, the laser correcting jig frames are horizontal;
step 2: and (3) sectional type conveying and mounting:
(1) arranging a main beam: as shown in fig. 3, a main beam 7 is arranged on a 1.5m cylinder assembling jig frame 5, then the level is corrected by laser and a jack, the placing position of the 1.5m cylinder assembling jig frame 5 is ensured to be aligned with an inner transverse partition plate of the main beam, a plumb bob is used for hanging a center line, the center line of the main beam 7 is aligned with the center line marked on the ground, the opening size of the main beam, the center size of a supporting leg and the diagonal size are ensured, specifically, the height difference of the jacking horizontal zero point of the main beam is not more than +/-1.5 mm, the inner side of the central line of the supporting leg has 0-5mm inner bend and is not required to have sudden change, and the diagonal tolerance | K1-K2 |;
(2) assembling and welding end beams: respectively placing the end beams 8 in parallel at the central line marked on the ground, leveling by using laser, and trimming the margins at the two ends of the end beams according to the actual condition; then, moving the two end cross beams in place respectively to enable the end beams 8 of the trapezoidal box structure to be located at two ends of the main beam, using a plumb bob to hoist the center, enabling the center line of the end beam to be aligned with the center line of the end beam scribed on the ground, ensuring that the end beam is aligned and correcting the horizontal; then, welding a connecting welding seam between the main beam 7 and the end beam 8 according to requirements, carrying out 100% test on the welding seam without damaging UT, and finally removing the 3m cylinder assembly jig frame 6 at the end part;
(3) installing an upper landing leg door frame: as shown in fig. 4, according to the central line of the landing leg marked on the ground, symmetrically adding 1.5m cylinders to the side of the main beam 7 to assemble a jig frame, then marking a mounting line of the upper landing leg door frame on the main beam, hoisting the upper landing leg door frame 9 according to the marked mounting line of the upper landing leg door frame and pulling a cable wire rope 10, then adjusting the relative positioning size of the upper landing leg door frame 9 and the main beam 7, and after adjusting the alignment rib, welding the upper landing leg door frame 9 as required;
(4) and (3) installing a support rod assembly: hoisting the V-shaped stay bar assembly 11 to the main beam 7, adjusting the center of the V-shaped stay bar assembly 11 to coincide with the center of the span, fixing the end part of the V-shaped stay bar assembly 11 and the inserting plate on the main beam 7 in a spot welding mode after the adjustment is qualified, wherein the length of a spot welding fixed welding line is more than or equal to 100mm, and drawing a cable rope as required;
(5) and (3) mounting a pull rod: as shown in fig. 5, a first pull rod 12 is hoisted to a position between an upper landing leg door frame 9 and a support rod assembly 11, the upper end of the first pull rod 12 is connected with an upper beam connecting assembly of the upper landing leg door frame 9 through a pin shaft, an eccentric sleeve of the first pull rod 12 is adjusted, the lower end of the first pull rod 12 is connected with a central node plate of a V-shaped support rod assembly 11 through the pin shaft, when the eccentric sleeve is not adjusted in place, a discontinuous welding seam at the lower end of the support rod, which is aligned with the first pull rod 12, in the support rod assembly 11 is subjected to carbon planing and cleaning, after the welding seam is cleaned, the lower end of the support rod is subjected to fine tuning through a chain block, and the eccentric sleeve at the lower end of the first pull rod 12 is adjusted at the same time, so that the lower end of the first pull rod 12 can be; hoisting a second pull rod 13 between the upper landing leg door frame 9 and the end beam 8, connecting the upper end of the second pull rod 13 with an upper beam connecting assembly of the upper landing leg door frame 9 by using a pin shaft, and fixing the lower end of the second pull rod 13 with a plug board on the end beam 8 in a spot welding manner;
(6) the pull rod is supported and installed: marking a pull rod support installation line on a main beam according to the central line of the V-shaped support rod assembly 11, hoisting a doorframe-type pull rod support 14 according to the marking line, drawing a cable wind steel wire rope 10, adjusting the pair of ribs of the pull rod support 14 and the main beam, and completing welding according to requirements to enable the pull rod support 14 to form external supports for pull rods on the main beam 7; then, adjusting the level by using a jack, keeping the girders at two sides in a free state, and ensuring the straightness, the camber, the height difference, the track gauge, the central line of the landing leg and the diagonal size of the landing leg, wherein the camber of the girders is 1.1-1.3S, the inner side of the central line of the landing leg has 0-5mm of inward bending and cannot have sudden change, the outer side of the central line of the landing leg has 0-5mm of outward bending, the tolerance | K1-K2 | of the landing leg is less than or equal to 5mm, the straightness of the girder-supporting rails of the two girders is less than or equal to 6mm, and the height difference of the jacking zero points of the girders is not more than +/-1.5 mm;
(7) mounting a process support: as shown in fig. 6, two process supports 15 are respectively hoisted to the inner side of the main beam 7 between the upper landing leg door frame 9 and the pull rod support, the process supports 15 are moved to be close to the upper landing leg door frame 9 according to the pre-welded flange components on the inner side surface of the main beam 7, and after the process supports are moved in place, the process support truss components and the flange components pre-welded on the inner side surface of the main beam 7 are connected through bolts; the specific structure of the technical support 15, as shown in fig. 9, includes two main rods 151 arranged in parallel and a plurality of connecting rods 152 in a wave-shaped structure fixedly connected with the two main rods 151, and the centers of the two adjacent connecting rods 152 are also provided with connecting rod supports 153 perpendicular to the main rods 151, so that the original frame type is changed into a sheet type, and four flange plates are reduced after the improvement, thereby reducing the installation workload of bolts, reducing the installation difficulty of the supporting rods, and being convenient to use;
(8) installing a lower structure: as shown in fig. 7, the main beam assembly is lifted by using a floating crane, a lower structure installation line is marked on the main beam 7, the lower structure 16 is hoisted in place according to the marking line, a 3.7m cylindrical jig frame 17 is arranged, and the lower structure 16 and the main beam 7 are aligned by using a jack and a chain block to adjust the alignment of the lower structure 16 and the main beam 7, so that the track gauge of a large vehicle and the center of a supporting leg are ensured to be opened; adjusting the level by using a jack, retesting the straightness, the camber, the height difference, the gauge and the central line and diagonal dimension of the support leg of the rail-bearing beam when the girders on the two sides are in a free state, loosening a section of process support during retesting, and reconnecting after retesting;
(9) rail arrangement: as shown in fig. 8, the whole line is drawn, the trolley track is arranged in a row roughly, the height difference of the rail top at the track interface is guaranteed to be +/-0.5 and is not more than 1mm within the range of 2m, the straightness of the trolley track is not more than 6mm within the full-length range and needs to be bent inwards, and the deviation between the track center and the central line of the rail bearing beam is not more than 5 mm;
(10) and (3) auxiliary structure installation: a ladder platform 18, a trolley buffer 19 and a cable towing device 20 are arranged on the main beam 7, and the assembly of the girder of the ultra-large rail crane is completed.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. An ultra-large type rail crane girder assembling process is characterized in that: the assembly process is mainly carried out in a mode of sectional type transportation and installation after integral layout,
the overall layout mainly comprises field selection, marking and jig frame arrangement;
the sectional type conveying and mounting sequentially comprises main beam arrangement, end beam welding, upper supporting leg doorframe mounting, brace rod assembly mounting, pull rod support mounting, process support mounting, lower part structure mounting, rail arrangement and auxiliary structure mounting;
the assembly process comprises the following specific steps:
step 1: overall layout:
(1) selecting a field: selecting a field with a hard foundation as an assembling field, and then cleaning up sundries on the assembling field to ensure that the assembling field is smooth;
(2) scribing: firstly, drawing a girder symmetrical center line on the ground of an assembly site by using a laser theodolite, then drawing a girder center line by taking the girder symmetrical center line as a reference, and sequentially drawing a support leg center line, an end beam center line and a jig frame arrangement center line;
(3) the jig frame is arranged: arranging a standardized girder assembling jig frame according to a jig frame arrangement central line on an assembling site, namely arranging a 1.5m cylindrical assembling jig frame and a 3m cylindrical assembling jig frame in place, and after the jig frame is arranged, correcting the jig frame to be horizontal by laser;
step 2: and (3) sectional type conveying and mounting:
(1) arranging a main beam: arranging a main beam on a 1.5m cylinder assembling jig frame, then correcting the horizontal position by using laser and a jack, ensuring that the placing position of the 1.5m cylinder assembling jig frame is aligned with an inner diaphragm plate of the main beam, and hanging a centering line by using a plumb bob, so that the central line of the main beam is aligned with a central line drawn on the ground, and ensuring the opening size of the main beam, the central size of a supporting leg and the diagonal size;
(2) assembling and welding end beams: respectively placing the end beams in parallel at the central line marked on the ground, leveling by using laser, and trimming the margins at the two ends of the end beams according to the actual condition; then, moving the two end cross beams in place respectively to enable the end beams of the trapezoidal box structure to be located at two ends of the main beam, using a plumb bob to hoist the center, enabling the center line of the end beam to be aligned with the center line of the end beam scribed on the ground, ensuring that the end beams are aligned and correcting the horizontal; then, welding a connecting welding seam between the main beam and the end beam as required, carrying out 100% test on the welding seam without damaging UT, and finally removing the 3m cylinder assembly jig frame at the end part;
(3) installing an upper landing leg door frame: according to the central line of the support leg marked on the ground, symmetrically adding 1.5m cylinders to assemble a jig frame at the side part of a main beam, then marking a mounting line of an upper support leg door frame on the main beam, hoisting the upper support leg door frame according to the marked mounting line of the upper support leg door frame and drawing a cable wire rope, then adjusting the relative positioning size of the upper support leg door frame and the main beam, adjusting a pair rib, and welding the upper support leg door frame according to requirements;
(4) and (3) installing a support rod assembly: hoisting the V-shaped stay bar assembly to the main beam, adjusting the center of the V-shaped stay bar assembly to coincide with the center of the span, fixing the end part of the V-shaped stay bar assembly and the inserting plate on the main beam in a spot welding manner after the adjustment is qualified, wherein the length of the spot welding fixed welding line is more than or equal to 100mm, and pulling the cable rope as required;
(5) and (3) mounting a pull rod: hoisting a first pull rod to a position between an upper landing leg door frame and a support rod assembly, connecting the upper end of the first pull rod with an upper crossbeam connecting assembly of the upper landing leg door frame by using a pin shaft, adjusting a first pull rod eccentric sleeve, connecting the lower end of the first pull rod with a central node plate of a V-shaped support rod assembly by using the pin shaft, performing carbon planing on a discontinuous welding seam of the lower end of the support rod aligned with the first pull rod in the support rod assembly when the eccentric sleeve is not adjusted in place, fine adjusting the lower end of the support rod by using a chain block after the welding seam is removed, and simultaneously adjusting the eccentric sleeve of the lower end of the first pull rod to ensure that the lower end of the first pull rod can be subjected to shaft assembly and the support rod of the support rod assembly is subjected to spot; hoisting a second pull rod to a position between the upper landing leg door frame and the end beam, connecting the upper end of the second pull rod with an upper cross beam connecting assembly of the upper landing leg door frame by using a pin shaft, and fixing the lower end of the second pull rod with a plug board on the end beam in a spot welding manner;
(6) the pull rod is supported and installed: marking a pull rod support installation line on the main beam according to the central line of the V-shaped support rod assembly, hoisting the doorframe-type pull rod support according to the marking line, drawing a cable wind steel wire rope, adjusting the pair of the pull rod support and the main beam, and then completing welding according to requirements to enable the pull rod support to form external supports for all pull rods on the main beam; then, adjusting the level by using a jack, and keeping the girders at the two sides in a free state to ensure the straightness, the camber, the height difference, the track gauge and the central line and the diagonal dimension of the support leg;
(7) mounting a process support: hoisting the two process supports to the inner side of a main beam between the upper landing leg door frame and the pull rod support respectively, moving the process supports to be close to the upper landing leg door frame according to a pre-welded flange component on the inner side of the main beam, and connecting the process support truss component with the flange component pre-welded on the inner side of the main beam through bolts after the process supports are moved in place;
(8) installing a lower structure: lifting a main beam assembly by using a floating crane, marking a lower structure mounting line on the main beam, hoisting the lower structure in place according to the marking line, arranging a 3.7m cylindrical jig frame, adjusting the lower structure and main beam alignment ribs by using a jack and a chain block, and ensuring the track gauge of a large truck and the opening of the center of a supporting leg; adjusting the level by using a jack, keeping the girders on the two sides in a free state, and retesting the straightness, camber, height difference, gauge, central line of the supporting leg and diagonal dimension of the supporting rail;
(9) rail arrangement: integrally marking, roughly arranging trolley tracks, ensuring that the height difference of the top of the tracks at the track interface is +/-0.5 and cannot exceed 1mm within the range of 2m, ensuring that the straightness of the trolley tracks does not exceed 6mm within the full-length range and needs to be bent inwards, and ensuring that the deviation between the track center and the central line of a track bearing beam is not more than 5 mm;
(10) and (3) auxiliary structure installation: and a ladder platform, a trolley buffer and a cable towing order are arranged on the main beam to complete the assembly of the girder of the ultra-large rail crane.
2. The assembling process of the girder of the ultra-large type track crane according to claim 1, which is characterized in that: after the main beam is arranged in the step 2, the height difference of the jacking horizontal zero position of the main beam is not more than +/-1.5 mm, the inner side of the central line of the supporting leg is provided with 0-5mm of inward bend without sudden change, and the diagonal tolerance | K1-K2 | of the supporting leg is not more than 5 mm.
3. The assembling process of the girder of the ultra-large type track crane according to claim 1, which is characterized in that: after the pull rod support is installed in the step 2, the camber of the girder is 1.1-1.3S, the inner side of the central line of the supporting leg is provided with 0-5mm of inward bending and cannot be suddenly changed, the outer side of the central line of the supporting leg is provided with 0-5mm of outward bending, the tolerance | K1-K2 | of the diagonal line of the supporting leg is less than or equal to 5mm, the straightness of the two girder supporting rails is less than or equal to 6mm, and the height difference of the jacking horizontal zero points of the girder is less than or equal to +/-1.5 mm.
4. The assembling process of the girder of the ultra-large type track crane according to claim 1, which is characterized in that: in the step 2, during installation of the process support, the process support comprises two main rods arranged in parallel and a plurality of connecting rods which are fixedly connected with the two main rods and are of a wave-shaped structure, and a connecting rod support perpendicular to the main rods is further arranged at the centers of the two adjacent connecting rods.
5. The assembling process of the girder of the ultra-large type track crane according to claim 1, which is characterized in that: and (3) after the lower part structure is installed in the step (2), loosening a section of process support during repeated measurement, and reconnecting after the repeated measurement is finished.
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| CN113415740B (en) * | 2021-08-04 | 2023-08-18 | 上海振华重工(集团)股份有限公司 | Guide frame on front girder of quay crane and installation method thereof |
| CN113460876B (en) * | 2021-08-06 | 2023-10-27 | 上海振华重工(集团)股份有限公司 | Method for installing upper component of quay crane |
| CN115162813A (en) * | 2022-07-14 | 2022-10-11 | 中国三冶集团有限公司 | Ground assembling method for cylindrical thin oil tank piston module |
| CN117585584B (en) * | 2024-01-18 | 2024-03-22 | 山西八建集团有限公司 | Lifting device for hoisting heavy steel structure |
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| US8671490B1 (en) * | 2013-03-06 | 2014-03-18 | Mark Carney | Bridge span replacement system |
| CN103203603A (en) * | 2013-04-23 | 2013-07-17 | 上海振华重工(集团)股份有限公司 | Method for manufacturing crane arm support |
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