CN114074894B - Folding manufacturing process for portal frame end beam and travelling mechanism of portal crane - Google Patents
Folding manufacturing process for portal frame end beam and travelling mechanism of portal crane Download PDFInfo
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- CN114074894B CN114074894B CN202111208436.6A CN202111208436A CN114074894B CN 114074894 B CN114074894 B CN 114074894B CN 202111208436 A CN202111208436 A CN 202111208436A CN 114074894 B CN114074894 B CN 114074894B
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- portal
- end beam
- lower connecting
- connecting support
- portal frame
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- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000003466 welding Methods 0.000 claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000003754 machining Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 17
- 238000010586 diagram Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 12
- 238000009966 trimming Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 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
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A portal frame end beam and travelling mechanism folding manufacturing process of a portal frame of a portal crane comprises the following steps: firstly, assembling and welding the coaming and the portal end beam flange plate to form a lower connecting support; machining a flange plate in the lower connecting support; thirdly, preassembling lower connecting supports when the portal end beams and the portal cross beams are folded into an assembly, and knocking corresponding steel seal numbers in the thickness direction of flange plates of each lower connecting support; fourthly, when the big group is folded, the saddle and the lower connecting support are connected by bolts to form a saddle assembly II; fifth, when the big group is folded, the saddle assembly II is connected with the travelling mechanism through the shaft; hoisting the portal frame end beam and portal frame cross beam assembly to four groups of travelling mechanisms; seventhly, welding a folding weld joint between the portal frame end beam and the saddle assembly II. The invention optimizes the manufacturing process of the large combination and avoids the construction difficulty and construction danger of the operation in the narrow space inside the portal end beam.
Description
Technical Field
The invention relates to a folding manufacturing process of a portal frame end beam and a travelling mechanism of a portal crane.
Background
As shown in background fig. 1-4, the current field folding and installing process flow is as follows: a process hole 1 is formed in the portal frame end beam 3 in advance, and a folding trimming allowance is placed in advance at the position of a folding opening 2 of the portal frame end beam 3 and a saddle assembly I5; the method comprises the steps of connecting a saddle 8 with an end beam flange plate 7 through technical bolts to form a saddle assembly I5, positioning four groups of travelling mechanisms according to ground sample lines, adjusting the horizontal and vertical directions, connecting the saddle assembly I5 with the travelling mechanisms in a penetrating way, hoisting the gantry end beam 3 and a gantry beam 4 assembly to the four groups of travelling mechanisms, trimming the allowance between the gantry end beam 3 and the saddle assembly I5, manually chamfering, welding a folding weld joint between the gantry end beam 3 and the saddle assembly I5 from a preset process hole 1 in the gantry end beam 3, and welding a process hole 1 preset in the gantry end beam to ensure the full penetration requirement of the weld joint, wherein an external carbon plane is required to assemble and weld a reinforcing triangle 6 at the outer side of the saddle assembly I.
As shown in background fig. 5, the folding weld joint of the portal end beam 3 and the saddle assembly I5 requires full penetration, and the welding mode is welding in the box body, and carbon planing and welding outside the box body.
The following problems exist in the operation process:
1. after finishing the allowance trimming and groove opening, the crane for hoisting the 'door frame end beam 3 and door frame cross beam 4 assembly' operation can be unhooked, and the invalid operation time of the crane is prolonged;
2. the difficulty and the poor molding of the manual cutting groove on site are high, and the welding quality of the subsequent folding joint is affected;
3. the inner operation space of the portal end beam 3 is narrow, so that the welding work difficulty of a folding welding line between the portal end beam 3 and the saddle assembly I5 is increased, the welding line quality is not easy to guarantee, and the construction danger is increased due to the narrow space operation;
4. the damage amount of the external carbon planing operation to the paint surface with the intact periphery is large;
5. when welding a folding weld joint between the portal frame end beam 3 and the saddle assembly I5, the angle deformation of the middle end beam flange plate 7 of the saddle assembly I5 is easy to cause;
6. the stress of the bolt is easy to increase;
7. the operation space inside the portal end beam 3 is narrow, the difficulty of pre-opening the process hole 1 inside the portal end beam 3 is increased, and the risk of construction is increased due to narrow space operation.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: a more optimized large assembly manufacturing process is provided. The construction difficulty and construction dangers of the operation in a narrow space inside the portal end beam are avoided; the construction difficulty of manually cutting the groove on site is avoided, and the risk that the welding quality of the subsequent folding seam is affected due to poor molding of the manually cut groove is avoided; reducing the angular deformation of the flange plate and the stress of the bolts generated during the welding of the folding joint between the portal end beam and the saddle assembly I; the damage of ineffective operation and perfect paint surface of the crane caused by hoisting the 'portal end beam and portal beam assembly' is reduced; the manufacturing cost is reduced.
In order to solve the technical problems, the invention provides: a portal frame end beam and travelling mechanism folding manufacturing process of a portal frame of a portal crane comprises the following steps:
firstly, assembling and welding the coaming and the portal end beam flange plate to form a lower connecting support;
machining a flange plate in the lower connecting support;
when the portal end beams and the portal cross beams are folded into an assembly, preassembling lower connecting supports, and knocking steel seal numbers on the flange plate thickness direction of each lower connecting support, wherein the steel seal number of each lower connecting support is unique;
fourthly, when the big group is folded, the saddle and the lower connecting support are connected by bolts to form a saddle assembly II;
fifth, when the big group is folded, the saddle assembly II is connected with the travelling mechanism through the shaft;
hoisting the portal frame end beam and portal frame cross beam assembly to four groups of travelling mechanisms;
seventhly, welding a folding weld joint between the portal frame end beam and the saddle assembly II.
In the third step, when preassembling, the length direction and the width direction are positioned by taking the structural center line of the assembly as a reference and according to the required size of the structure diagram, the lower connecting support is positioned; the lower connecting support is aligned with the hard stop of the door frame end beam;
further, in the third step, when preassembled, the height direction ensures that the flange surfaces of the lower connecting supports are in the same horizontal plane by adjusting the gaps between the lower connecting supports and the door frame end beams;
further, the gap is 4-12 mm;
further, after the positioning is finished, a steel gasket is assembled at the inner side gap of the box body of the lower connecting support, and the steel gasket is only welded with the lower connecting support;
further, when the large group is folded, a ceramic liner is stuck at a gap on the outer side of the box body of the lower connecting support;
further, when the large group is folded, the folding seam welding mode of the portal end beam and the saddle assembly II is full penetration, the welding mode of one circle of welding seam is pad welding, and the welding seam is only welded outside the box body.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts a gasket welding process method for the folding joint between the lower connecting support and the door frame end beam, and the gap at the inner side of the box body of the lower connecting support is pasted with a steel gasket, and the gap at the outer side of the box body of the lower connecting support is pasted with a ceramic gasket, and only needs to be welded outside the box body. Therefore, a pre-opened process hole on the portal frame end beam can be omitted, the process hole is formed for completing a folding joint between the lower connecting support and the portal frame end beam, and the subsequent construction difficulty and construction danger of plugging the process hole in a narrow space inside the portal frame end beam are avoided; the construction difficulty and construction dangers of welding the folding joint in the narrow space inside the portal end beam are avoided; meanwhile, the gasket weld joint is formed in a single-sided welding and double-sided forming mode, so that carbon planing operation is not needed, and damage to an intact paint surface is avoided. Therefore, the pre-release folding trimming allowance of the portal end beam and the saddle assembly I can be canceled, and the groove prefabrication work of corresponding parts is finished in advance to the part stage. The construction difficulty of manually trimming allowance and cutting grooves on site is avoided, and the invalid operation time of the crane when the 'door frame end beam and door frame cross beam assembly' is hoisted is reduced; the risk that the welding quality of the subsequent folding seam is affected due to poor forming of the manual cutting groove on site is avoided.
2. According to the invention, the end beam structure and the saddle assembly I structure are divided and combined again, the lower connecting support is connected with the saddle to form the saddle assembly II, and the flange plate angle deformation and the bolt stress generated during welding of the folding weld joint between the portal end beam and the saddle assembly I are reduced.
Drawings
Fig. 1-5 are background diagrams.
Fig. 6 is a structural view of the end beam of the portal of the present invention.
Fig. 7-8 are schematic illustrations of a portal end beam and saddle assembly II combination of the present invention.
Fig. 9 is a schematic view of the structure of the "lower connection support" of the present invention.
Fig. 10-12 are pre-assembled schematic views of the "lower connection bracket" and "portal end beam and portal cross beam assembly" of the present invention.
Fig. 13-14 are diagrammatic illustrations of reference marks in the preassembly of the present invention.
Fig. 15 is a schematic view of the pre-load time gap of the present invention.
Fig. 16 is a schematic view of the invention with steel gaskets assembled at the gap during preassembly.
Fig. 17 is a schematic view of the structure of the saddle assembly II according to the present invention.
[0019 ] FIGS. 18-19 are schematic illustrations of the weld joint of the portal end beam and the "saddle assembly II" of the present invention.
FIG. 20 is a schematic diagram of the main sequence of the on-site large assembly operation of the present invention.
In the figure, a process hole 1, a closing opening 2, a portal end beam 3, a portal cross beam 4, a saddle assembly I, a triangle 6, an end beam flange plate 7, a saddle 8, a saddle 9, a saddle assembly II, a coaming 10, a lower connecting support 12, a steel gasket 13 and a ceramic gasket.
Detailed Description
As shown in fig. 6, the invention cancels the pre-opening of a process hole 1 on a portal frame end beam 3; the pre-release folding trimming allowance of the portal end beam 3 and the saddle assembly I5 is canceled, and the groove processing of corresponding parts can be completed in the part stage.
As shown in fig. 7-8, the mast end beam 3 structure is repartitioned and combined with the "saddle assembly I5" structure.
As shown in fig. 9, the coaming 10 of the portal end beam 3 structure is instead first welded to the end beam flange plate 7 to form a "lower connection bracket 11".
As shown in fig. 10-12, "lower connection brackets 11" are preloaded with "door frame end beam 3 and door frame cross beam 4 assembly", and steel marks are stamped in the direction of the flange plate thickness of each "lower connection bracket 11", each "lower connection bracket 11" has a unique steel mark, and the position of each "lower connection bracket 11" is recorded on the "lower connection bracket 11" preloaded record map.
As shown in fig. 13-14, the "lower attachment support 11" is positioned in the desired dimensions of the block diagram, with the longitudinal and width directions being referenced to the structural centerline of the assembly when preassembled. And simultaneously, the lower connecting support 11 is aligned with the hard stop of the door frame end beam 3.
As shown in FIG. 15, when preassembled, the height direction is detected by a level gauge by adjusting the gaps between the lower connecting supports 11 and the door frame end beams 3, wherein the gaps are controlled to be 4-12 mm, and the flange surfaces of the lower connecting supports 11 are ensured to be on the same horizontal plane.
As shown in fig. 16, after the preassembly positioning is completed, the steel gasket 12 is assembled at the gap inside the case of the "lower connection support 11", and at this time, the steel gasket 12 is welded only to the "lower connection support 11".
As shown in fig. 17, in the large-scale assembly work on site, the "saddle 8" and the "lower connecting support 11" are bolted together using a process bolt to form the "saddle assembly II9".
As shown in fig. 18-19, the closure seam welding requirement of the portal end beam 3 and the saddle assembly II9 is full penetration, and the welding mode of one circle of welding seam is pad welding. The gap between the lower connecting support 11 and the inner side of the box body is pasted with a steel gasket 12, which is finished when the lower connecting support 11 and the door frame end beam 3 and door frame cross beam 4 assembly are preassembled, as shown in fig. 14. The gap outside the box body of the lower connecting support 11 is stuck with a ceramic liner 13. All are welded outside the box body only.
As shown in fig. 20, the main manufacturing sequence at the time of field large group closure is as follows:
the saddle 8 is connected with the lower connecting support 11 by using a process bolt to form a saddle assembly II9, four groups of travelling mechanisms are positioned according to a ground pattern line, the horizontal and vertical directions are adjusted, the saddle assembly II9 is connected with a corresponding travelling mechanism through shaft according to the preassembly record diagram of the lower connecting support 11, the position of the lower connecting support 11 of each steel seal number is ensured to be in line with the preassembly record diagram of the lower connecting support 11, and the door frame end beam 3 and the door frame beam 4 assembly are hoisted to the four groups of travelling mechanisms, and gaps outside the box body of the lower connecting support 11 are provided with ceramic gaskets 13. And welding a folding weld joint between the portal end beam 3 and the saddle assembly II 9.
Claims (7)
1. A portal frame end beam and travelling mechanism folding manufacturing process of a portal frame of a portal crane is characterized in that: the method comprises the following steps:
firstly, assembling and welding the coaming and a portal end beam flange plate to form a lower connecting support;
machining a flange plate in the lower connecting support;
when the portal end beams and the portal cross beams are folded into an assembly, preassembling lower connecting supports, and knocking steel seal numbers on the flange plate thickness direction of each lower connecting support, wherein the steel seal number of each lower connecting support is unique;
fourthly, when the big group is folded, the saddle is connected with the lower connecting support by bolts to form a saddle assembly II;
fifth, when the big group is folded, the saddle assembly II is connected with the travelling mechanism through a shaft;
hoisting the portal frame end beam and portal frame cross beam assembly to four groups of travelling mechanisms;
seventhly, welding a folding weld joint between the portal end beam and the saddle assembly II.
2. The folding manufacturing process of the portal frame end beam and the travelling mechanism of the portal crane according to claim 1, which is characterized by comprising the following steps: in the third step, when preassembling, the lower connecting support is positioned according to the required size of the structure diagram by taking the structural center line of the portal end beam and cross beam assembly as a reference; the lower connecting support is aligned with the hard stop of the portal end beam.
3. The folding manufacturing process of the portal frame end beam and the travelling mechanism of the portal crane according to claim 1, which is characterized by comprising the following steps: in the third step, when preassembled, the height direction ensures that the flange surfaces of the lower connecting supports are in the same horizontal plane by adjusting the gaps between the lower connecting supports and the door frame end beams.
4. A portal frame end beam and travelling mechanism folding manufacturing process of a portal frame of a portal crane according to claim 3, which is characterized in that: the gap is 4-12 mm.
5. The folding manufacturing process of the portal frame end beam and the travelling mechanism of the gantry crane according to claim 2 is characterized by comprising the following steps: after the positioning is finished, a steel gasket is assembled at the gap of the inner side of the lower connecting support box body, and the steel gasket is only welded with the lower connecting support.
6. The folding manufacturing process of the portal frame end beam and the travelling mechanism of the portal crane according to claim 1, which is characterized by comprising the following steps: when the big group is folded, a ceramic liner is stuck at the gap of the outer side of the lower connecting support box body.
7. The folding manufacturing process of the portal frame end beam and the travelling mechanism of the portal crane according to claim 1, which is characterized by comprising the following steps: when the large group is folded, the welding mode of the folding joint of the portal end beam and the saddle assembly II is full penetration, the welding mode of one circle of welding joint is pad welding, and the welding is only performed outside the box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208436.6A CN114074894B (en) | 2021-10-18 | 2021-10-18 | Folding manufacturing process for portal frame end beam and travelling mechanism of portal crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208436.6A CN114074894B (en) | 2021-10-18 | 2021-10-18 | Folding manufacturing process for portal frame end beam and travelling mechanism of portal crane |
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| Publication Number | Publication Date |
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| CN114074894A CN114074894A (en) | 2022-02-22 |
| CN114074894B true CN114074894B (en) | 2024-04-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115476064B (en) * | 2022-09-14 | 2023-06-30 | 南通中远海运重工装备有限公司 | Manufacturing process of main beam of tyre gantry crane |
| CN116787020B (en) * | 2023-08-29 | 2023-10-24 | 广州文船重工有限公司 | Portal assembling method of portal crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU783197A1 (en) * | 1979-01-12 | 1980-11-30 | Предприятие П/Я А-7255 | Method of self-erecting of gantry crane with bringing together the leg bases in pairs |
| CN201209083Y (en) * | 2008-04-22 | 2009-03-18 | 浙江华东机电工程有限公司 | Folding gantry crane |
| CN201376848Y (en) * | 2009-03-20 | 2010-01-06 | 史胜海 | Large-scale double-tower automatic-elevation hoisting equipment |
| JP2012229071A (en) * | 2011-04-25 | 2012-11-22 | Ihi Infrastructure Systems Co Ltd | Operational construction method by means of goliath crane |
| CN204675653U (en) * | 2015-04-28 | 2015-09-30 | 李莹 | A kind of adjustable transfer crane |
| CN108946498A (en) * | 2018-07-30 | 2018-12-07 | 中铁十六局集团北京轨道交通工程建设有限公司 | A kind of light detachable travelling gantry rack device and its application method |
| CN211971558U (en) * | 2020-03-16 | 2020-11-20 | 浙江省特种设备科学研究院 | Multifunctional intelligent gantry crane |
-
2021
- 2021-10-18 CN CN202111208436.6A patent/CN114074894B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU783197A1 (en) * | 1979-01-12 | 1980-11-30 | Предприятие П/Я А-7255 | Method of self-erecting of gantry crane with bringing together the leg bases in pairs |
| CN201209083Y (en) * | 2008-04-22 | 2009-03-18 | 浙江华东机电工程有限公司 | Folding gantry crane |
| CN201376848Y (en) * | 2009-03-20 | 2010-01-06 | 史胜海 | Large-scale double-tower automatic-elevation hoisting equipment |
| JP2012229071A (en) * | 2011-04-25 | 2012-11-22 | Ihi Infrastructure Systems Co Ltd | Operational construction method by means of goliath crane |
| CN204675653U (en) * | 2015-04-28 | 2015-09-30 | 李莹 | A kind of adjustable transfer crane |
| CN108946498A (en) * | 2018-07-30 | 2018-12-07 | 中铁十六局集团北京轨道交通工程建设有限公司 | A kind of light detachable travelling gantry rack device and its application method |
| CN211971558U (en) * | 2020-03-16 | 2020-11-20 | 浙江省特种设备科学研究院 | Multifunctional intelligent gantry crane |
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| CN114074894A (en) | 2022-02-22 |
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