High-precision construction method for a dock arm vehicle track structure

Abstract

The present application belongs to the technical field of floating dock arm car equipment construction, and discloses a high-precision construction method for a dock arm car track structure. The method effectively solves the problem that the precision cannot be guaranteed in the conventional construction method for the upper and lower track structures of the dock arm car. The method comprises the following steps: determining the overall construction process of the upper and lower track structures of the dock arm car; controlling the side bending of the track plate of the dock arm car; assembling and manufacturing the upper track structure of the dock arm car; assembling and manufacturing the lower track structure of the dock arm car; constructing the segments of the upper and lower track structures of the dock arm car; constructing the total segments of the upper and lower track structures of the dock arm car; and constructing the total segments of the upper and lower track structures of the dock arm car in the dock. The present application reasonably designs the construction process methods for the assembly, segmentation, total segment and closure of the upper and lower track structures of the dock arm car, reasonably decomposes the precision requirements of each stage, improves the construction efficiency while guaranteeing the construction quality, realizes the high-precision construction of the upper and lower track structures of the dock arm car, and thus meets the operation requirements of the dock arm car equipment.

Description

Technical Field

[0001] This invention belongs to the field of floating dock boom truck equipment construction technology, and particularly relates to a high-precision construction method for a boom truck track structure. Background Technology

[0002] A dock boom truck is a non-standard piece of equipment installed inside the dock walls on both sides of a floating dock. It is a core piece of equipment essential for the daily operation of a floating dock. For example... Figure 1 and Figure 2 As shown, the dock boom truck track is generally connected to the floating dock wall structure by welding. It is generally divided into upper and lower tracks, and the dock boom truck runs along the dock wall direction on its upper and lower tracks.

[0003] The upper and lower tracks of the boom dock truck are generally slender structures with irregular cross-sections. The upper track's upper, lower, inner, and outer surfaces are all working surfaces. The upper surface contacts the boom dock truck's load-bearing wheels and bears the truck's weight; the lower surface and the inner and outer surfaces contact the boom dock truck's guide wheels, which ensure the boom dock truck does not derail during operation. The upper track itself requires high precision, and controlling welding deformation during the fabrication of its slender, irregular cross-section structure is challenging. The lower track's main track plate has the boom dock truck's load-bearing wheels arranged vertically, bearing the horizontal pressure of the boom dock truck.

[0004] The conventional construction method of the upper and lower track structure of the boom truck has the following problems: (1) After the slender parts are flame-cut at one end, the temperature difference on both sides can easily cause side bending. If side bending occurs, it can be corrected by fire. However, it is easy to produce short length phenomenon, which leads to uncontrollable accuracy. (2) The upper and lower track assembly is generally a slender structure with irregular cross-section. It is easy to produce torsion deformation during the manufacturing process. The accuracy of the conventional construction method is difficult to guarantee. Summary of the Invention

[0005] The purpose of this invention is to provide a high-precision construction method for boom truck track structures, which effectively solves the problem of difficulty in guaranteeing accuracy in conventional construction methods for upper and lower track structures of boom trucks.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high-precision construction method for a dock boom truck track structure, comprising the following steps: S1, analyzing the working principle of the load-bearing wheels and guide wheels of the dock boom truck's traveling mechanism, as well as the structural form of the upper and lower tracks of the dock boom truck; based on the working principle and operating requirements of the dock boom truck equipment, analyzing the working principle of each action mechanism of the dock boom truck, the working principle and working load of the dock boom truck's load-bearing frame, load-bearing wheel group and guide wheel group, proposing the precision requirements for the final completed state of the upper and lower tracks of the dock boom truck, and determining the priority of each precision index; determining the dock boom... The structural division of the dock wall area to which the car belongs, and the assembly division of the upper and lower rails of the dock boom car to which the segments belong; determining the construction base surface for the assembly of the upper and lower rails of the dock boom car, the construction base surface of the main assembly of the segment, and the construction base surface of the main segment of the dock wall area to which the car belongs; S2, control of the side curvature of the dock boom car rail slab during material cutting; S3, assembly and fabrication of the upper rail structure of the dock boom car; S4, assembly and fabrication of the lower rail structure of the dock boom car; S5, construction of the segments to which the upper and lower rails of the dock boom car belong; S6, construction of the main segment to which the upper and lower rails of the dock boom car belong; S7, closure and construction of the main segment to which the upper and lower rails of the dock boom car belong within the dock.

[0007] Furthermore, step S2 specifically includes the following steps: S21. Based on the length requirements of the segments of the upper and lower rails of the dock boom truck and in conjunction with the market supply specifications of the rail plates, determine the main rail plate width scheme of the upper and lower rails of the dock boom truck. The rail plates are cut along the entire length of a single segment without setting a joint in the ship's length direction; S22. The rail plates are cut using a multi-head flame cutting machine, cutting several rail plates simultaneously; S23. Prioritize ensuring the lateral bending control requirements during the rail plate cutting stage, while also considering the rail plate cutting allowance loss, comprehensively determine the rail plate width, and ensure that the temperature on both sides of the rail plate is equal during the cutting process.

[0008] Furthermore, step S3 specifically includes the following steps: S31, based on the structural characteristics of the rail assembly on the boom truck, determine the rail assembly process on the boom truck; using the high-precision rail panel as a template, install the rail web, support plate, outer horizontal partition, outer vertical partition, inner vertical partition and inner horizontal rib in sequence to form a complete upper rail assembly.

[0009] S32. Based on the structural characteristics of the boom lift track and the layout of the pre-embedded iron at the boom lift track assembly construction site, determine the form of the special jig for boom lift track assembly.

[0010] S33. Before mounting the track T-material panel, check the straightness of the track T-material panel. If the straightness is out of tolerance or there is a side bend, adjust the straightness of the track T-material panel by mechanical straightening or water-fire straightening according to the degree of side bend.

[0011] S34. The upper part of the track T-material panel is sealed with the sealing plates arranged on both sides of the track T-material panel and the column channel steel, but not welded to the track T-material panel body; the outer vertical partition and the inner vertical partition are prefabricated at the same time.

[0012] S35. Install the web of the track T-material to form the track T-material. Use a square to check the perpendicularity between the web and the panel. Complete the fillet weld between the track panel and the track web at the inner vertical partition, with each weld length being 100mm. During the assembly process, control the perpendicularity of the web to ≤1mm and the straightness of the web to ≤2mm.

[0013] S36. Install the outer support plate, outer horizontal partition, outer vertical partition, inner vertical partition, and inner horizontal reinforcement in sequence to form a complete dock boom car track assembly.

[0014] S37. Welding construction is carried out using the segmented skip welding method along the length of the track. At the same time, the welding is carried out symmetrically on the left and right sides with the track web as the boundary. The remaining inner horizontal ribs are welded at an upward angle to the track web, and the outer horizontal partitions are welded at an upward angle to the track web. Welding is completed after the assembly is turned 90°.

[0015] S38. After the upper rail assembly welding is completed, back heat is applied to release the welding stress of the upper rail assembly on the dock boom vehicle.

[0016] Furthermore, step S4 specifically includes the following steps: S41. Based on the structural characteristics of the dock boom truck's lower track assembly, determine the assembly process of the dock boom truck's lower track assembly; first, use a high-precision track panel to butt-joint the track angle steel, and after completion, turn it over 180° to install the track web, outer vertical partition, and inner vertical support plate.

[0017] S42. Based on the structural characteristics of the boom lift's underrail and the layout of the pre-embedded iron at the boom lift's underrail assembly site, determine the form of the special jig for the boom lift's underrail assembly.

[0018] S43. Before mounting the track T-material panel, check the straightness of the track T-material panel. If the straightness is out of tolerance or there is a lateral bend, adjust the straightness of the track T-material panel by mechanical straightening or water-fire straightening according to the degree of lateral bend.

[0019] S44. The track T-material panel is fitted with a sealing plate on one side and welded to the column channel steel, but not welded to the track T-material panel body; a sealing plate is installed on one side of the track angle steel; and the outer vertical partition is prefabricated simultaneously.

[0020] S45. Install the web of the track T-material to form the track T-material. Use a square to check the perpendicularity between the web and the panel. Complete the fillet weld between the track panel and the track web at the outer vertical partition, with each weld length being 100mm. During the assembly process, control the perpendicularity of the web to ≤1mm and the straightness of the web to ≤2mm.

[0021] S46. Install the outer vertical partition and the inner vertical support plate.

[0022] S47. Welding construction shall be carried out using the segmented skip welding method along the length of the track.

[0023] S48. After the lower rail assembly welding is completed, back heat is applied to release the welding stress of the lower rail assembly of the dock boom truck.

[0024] Furthermore, step S5 specifically includes the following steps: S51. Based on the structural characteristics of the segment to which the lower rail assembly of the dock boom car belongs, determine the construction base and construction process of the segment's large assembly; the segment is constructed using the outer dock wall as a base. First, the outer dock wall assembly is used as a base, and then the inner dock wall large medium assembly and the top deck medium assembly are installed in sequence, followed by the installation of the upper rail assembly and the lower rail assembly.

[0025] S52. The outer dock wall assembly is installed on the upper frame, and the inner dock wall large intermediate assembly and the top deck intermediate assembly are installed in sequence to form the main body of the segment. After that, the internal welding of the segment is completed.

[0026] S53. After completing the internal welding of the sections, install the upper rail assembly and the lower rail assembly.

[0027] S54. Control the height and width spacing of the upper and lower rails during the assembly and welding process of the dock boom truck, and control the straightness of the rails during assembly and welding.

[0028] Furthermore, step S6 specifically includes the following steps: S61, normal assembly construction of the upper and lower rail sections of the dock boom truck; S62, controlling the docking accuracy of the upper and lower rails during the assembly construction stage; requirements for the working surface of the upper rail main body: smooth after welding, with a residual height of less than 0.5mm on the outer side, midship side and upper surface, and 1-2mm on the lower surface; requirements for the working surface of the lower rail main body: smooth after welding, with a residual height of less than 0.5mm.

[0029] Furthermore, step S7 specifically includes the following steps: S71, after the corresponding sections of the floating dock pontoon area are joined together, the pontoon sections are joined together; S72, during the dockside joining and construction stage, the docking accuracy of the upper and lower rails is controlled; the working surface of the upper rail main body rail requires: after welding, it should be ground smooth, and the excess height on the outer side, midship side and upper surface should be less than 0.5mm, and the excess height on the lower surface should be 1-2mm; the working surface of the lower rail main body rail requires: after welding, it should be ground smooth, and the excess height should be less than 0.5mm.

[0030] Compared with the prior art, the beneficial technical effects of the present invention are: (1) The present invention can effectively control the side bending phenomenon of the track plate by increasing the cutting allowance of the track plate and using a multi-head flame cutting machine to cut several track plates at the same time; by setting up a special jig for the upper and lower track assembly of the dock arm car and using the main panel of the track as the jig, the construction accuracy of the track plate is guaranteed first, and the difficulty of controlling the accuracy of the upper and lower tracks is reduced; by adopting a non-welded sealing jig measure on the working surface of the track plate, the amount of grinding work on the track surface is reduced, and the construction efficiency of the shipyard is improved; by using the steel wire method to monitor the track accuracy status in real time during the track assembly and welding process, the deviation is corrected in time, and the slender track with irregular cross section is prevented from being twisted and deformed in an S-shape, thus ensuring the construction accuracy of the track.

[0031] (2) This invention analyzes the working characteristics of the dock boom truck equipment and the structure of the upper and lower tracks of the dock boom truck to determine the overall construction process of the upper and lower tracks of the dock boom truck; by designing a reasonable construction base, assembly process and welding sequence for the upper and lower tracks of the dock boom truck, the construction difficulty of the upper and lower tracks of the dock boom truck is reduced.

[0032] (3) Based on the working principle and operation requirements of the dock boom truck equipment, this invention proposes the accuracy requirements for the final completed state of the upper and lower tracks of the dock boom truck, and decomposes them step by step to determine the priority of each accuracy index at each stage, so as to avoid design redundancy and improve the company's construction efficiency. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a boom lift.

[0034] Figure 2 This is a schematic diagram of the sections to which the upper and lower tracks of the boom lift belong.

[0035] Figure 3 This is a cross-sectional view of the working surface of the rail on the boom truck in Example 1.

[0036] Figure 4 This is a cross-sectional view of the working surface of the lower track of the boom truck in Example 1.

[0037] Figure 5 This is a schematic diagram showing the final accuracy requirements of the upper and lower tracks of the boom truck in Example 1.

[0038] Figure 6 This is a schematic diagram of the cutting of the dock boom vehicle track plate in Example 1, where B represents the width and L represents the length.

[0039] Figure 7 This is a flowchart of the rail assembly process on the boom truck in Example 1.

[0040] Figure 8 This is a schematic diagram of the special jig for assembling the track on the boom truck in Example 1.

[0041] Figure 9 yes Figure 8 A schematic diagram of direction A.

[0042] Figure 10 This is a schematic diagram of the method for checking the straightness of the track panel in Example 1.

[0043] Figure 11 This is a schematic diagram of the method for controlling the verticality of the web plate of the track base assembly in Example 1, where B represents the width and H represents the height.

[0044] Figure 12 This is a flowchart of the assembly process of the lower track of the dock boom vehicle in Example 1.

[0045] Figure 13 This is a schematic diagram of the special jig for assembling the track under the boom truck in Example 1.

[0046] Figure 14 yes Figure 13 A schematic diagram of direction B.

[0047] Figure 15 This is the assembly flowchart of the large group of sections belonging to the upper and lower tracks of the dock boom car in Example 1.

[0048] Figure 16 This is a schematic diagram of the segmented installation of the upper and lower tracks of the dock boom vehicle in Example 1.

[0049] Figure 17 This is a schematic diagram of the precision control of the upper and lower track segments of the boom truck in Example 1, where H represents the height and B represents the width.

[0050] Figure 18 This is a schematic diagram of the construction of the upper and lower tracks of the dock boom vehicle in Example 1. Detailed Implementation

[0051] Example 1: This example provides a high-precision construction method for the boom truck track structure, including the following steps: S1, determining the overall construction process of the upper and lower boom truck tracks; S2, controlling the side bending of the boom truck track slabs during material cutting; S3, assembling and fabricating the upper boom truck track structure; S4, assembling and fabricating the lower boom truck track structure; S5, constructing the sections belonging to the upper and lower boom truck tracks; S6, constructing the entire section belonging to the upper and lower boom truck tracks; S7, assembling the entire section belonging to the upper and lower boom truck tracks within the dock.

[0052] (i) In step S1, the overall construction process of the upper and lower rails of the dock boom truck is determined. Specifically, based on the working characteristics of the dock boom truck equipment and the structural form of the upper and lower rails of the dock boom truck, a construction method is determined for the self-fabrication of the upper and lower rails of the dock boom truck, including the assembly, segmentation, general assembly and closure of the upper and lower rails, which includes the following steps.

[0053] (1) Analyze the working principle of the load-bearing wheels and guide wheels of the boom truck traveling mechanism, as well as the upper and lower track structure of the boom truck.

[0054] The upper and lower tracks of a boom dock truck are generally slender structures with irregular cross-sections, relatively small cross-sectional dimensions, and long lengths. The upper track's main body, including its upper, lower, inner, and outer surfaces, serves as the working surface. The upper surface houses the boom dock truck's articulated balance beam load-bearing wheel assembly, which bears the truck's weight. During operation, misalignment at the track panel joints is not permitted; the joints must be smooth to prevent impact loads on the load-bearing wheels and shorten the boom dock truck's service life. The lower surface, as well as the inner and outer surfaces, are equipped with guide wheels to ensure the boom dock truck does not derail during operation. Figure 3 As shown. The lower track plate of the dock boom truck has measuring load-bearing wheels arranged on its vertical surface to bear the lateral pressure in the horizontal direction, such as... Figure 4 As shown.

[0055] (2) Based on the working principle and operation requirements of the boom truck equipment, the working principle of each action mechanism of the boom truck, the working principle and working load of the boom truck's load-bearing frame, load-bearing wheel group and guide wheel group are analyzed in detail. The accuracy requirements of the final completed state of the upper and lower tracks of the boom truck are proposed, such as... Figure 5 As shown: the dimension in the ship's height direction between the upper and lower rails of the dock boom truck is 5276mm, and the dimension in the ship's width direction between the upper and lower rails is 74mm. The standard deviation for the height spacing between the upper and lower rails of the dock boom truck is ±5mm, with an allowable limit of ±5mm; the width spacing between the upper and lower rails of the dock boom truck is ±5mm, with an allowable limit of ±5mm; the flatness of the upper rail of the dock boom truck is ≤L / 2000; the straightness of the upper rail of the dock boom truck is ≤L / 1000. Prioritizing these accuracy indicators helps avoid design redundancy and improves the company's construction efficiency.

[0056] (3) Based on the above overall analysis, determine the segment and total segment division of the dock wall area structure to which the dock boom car belongs, and the assembly division of the segments to which the upper and lower tracks of the dock boom car belong; determine the assembly construction base surface of the upper and lower tracks of the dock boom car, the assembly construction base surface of the major group of the segment to which it belongs, and the assembly base surface of the total segment of the dock wall area to which it belongs.

[0057] (ii) In step S2, the method for controlling the side bending of the track plate during material cutting specifically includes the following steps.

[0058] (1) Based on the length requirements of the upper and lower rails of the dock boom truck and in combination with the market supply specifications of rail plates, determine the main rail plate width scheme of the upper and lower rails of the dock boom truck. The rail plates are cut along the entire length of a single segment without setting a butt joint in the ship length direction to avoid quality problems caused by poor precision of the butt joint.

[0059] (2) such as Figure 6As shown, the track slabs are cut using a multi-head flame cutting machine, which cuts several track slabs at the same time to reduce the risk of lateral bending caused by temperature differences on both sides of the track slabs.

[0060] (3) Prioritize the lateral bending control requirements during the track slab cutting stage, while also considering the track slab cutting allowance loss. Comprehensively determine the track slab width to ensure that the temperatures on both sides are roughly equal during track slab cutting, thereby reducing the risk of lateral bending and improving the shipyard's construction efficiency. The cutting diagram is shown below. Figure 6 As shown, after cutting, the width of the remaining material should be greater than 50mm. That is, if the width of a single panel is required to be 300mm, and without considering cutting losses, if 6 panels are cut from one board at the same time, then the width of the board should be greater than (300*6+50+50=1900)mm.

[0061] (iii) In step S3, the method for assembling and fabricating the track structure on the boom truck specifically includes the following steps.

[0062] (1) Based on the structural characteristics of the rail assembly on the boom truck, the assembly base and other factors are considered to determine the rail assembly process on the boom truck, such as... Figure 7 As shown. Using a high-precision track panel as the base, the track web, support plate, outer horizontal partition, outer vertical partition, inner vertical partition, and inner horizontal rib are installed in sequence to form a complete upper track assembly.

[0063] (2) Based on the structural characteristics of the boom lift's upper rail and the layout of the pre-embedded iron at the boom lift's upper rail assembly construction site, determine the form of the special jig for boom lift upper rail assembly (specifically designed for the needs of upper rail assembly construction, set as needed, non-standard, non-universal type), such as Figure 8 and Figure 9 As shown.

[0064] (3) Before mounting the track T-material panel, check the straightness of the track T-material panel by pulling a steel wire. Figure 10 As shown, if the straightness of the track panel is out of tolerance or there is a lateral bend, the straightness of the track T-material panel can be adjusted by mechanical straightening or water-fire straightening methods depending on the degree of lateral bend.

[0065] (4) For the track T-material panel, in order to avoid leaving welding scars on the track working surface and affecting the local flatness of the track working surface, and at the same time to reduce the amount of post-weld grinding work, the sealing plates arranged on both sides of the track T-material panel are welded and sealed to the column channel steel, and are not welded to the track T-material panel body. The outer vertical partition and the inner vertical partition group can be prefabricated and erected simultaneously.

[0066] (5) Install the web of the track T-material to form the track T-material. Use a square to check the perpendicularity between the web and the panel. The checking method is as follows: Figure 11Complete the fillet welds between the track panel and the track web at the inner vertical partition, with each weld segment approximately 100mm in length. During assembly, focus on controlling the web verticality to ≤1mm and the web straightness to ≤2mm.

[0067] (6) Install the outer support plate, outer horizontal partition, outer vertical partition, inner vertical partition, and inner horizontal reinforcement in sequence to form a complete dock boom car track assembly.

[0068] (7) Welding construction is carried out by segmented skip welding in the length direction of the track. At the same time, the welding is carried out symmetrically on the left and right sides with the track web as the boundary to reduce the deformation trend of the upper track. The remaining inner horizontal ribs are welded at an angle to the track web, and the outer horizontal partitions are welded at an angle to the track web. Welding is completed after the assembly is turned 90°.

[0069] (8) After the upper rail assembly welding is completed, back heat is applied to release the welding stress of the upper rail assembly on the dock boom vehicle.

[0070] (iv) In step S4, the method for assembling and fabricating the lower track structure of the dock boom truck specifically includes the following steps: (1) Based on the structural characteristics of the lower track assembly of the dock boom truck, the assembly base surface and other elements, determine the assembly process of the lower track of the dock boom truck, such as... Figure 12 As shown: First, the high-precision track panel is joined with the track angle steel. After completion, it is turned 180° and the track web, outer vertical partition, and inner vertical support plate are installed.

[0071] (2) Based on the structural characteristics of the boom lift's lower track and the layout of the pre-embedded iron at the boom lift's lower track assembly construction site, determine the form of the special jig for boom lift lower track assembly (designed specifically for the needs of lower track assembly construction, set as needed, non-standard, non-universal type), such as Figure 13 and Figure 14 As shown.

[0072] (3) Before mounting the track T-material panel, check the straightness of the track T-material panel by pulling a steel wire. Figure 10 As shown, if the straightness of the track panel is out of tolerance or there is a lateral bend, the straightness of the track T-material panel can be adjusted by mechanical straightening or water-fire straightening methods depending on the degree of lateral bend.

[0073] (4) For the track T-material panel, in order to avoid leaving welding scars on the track working surface and affecting the local flatness of the track working surface, and at the same time reduce the amount of post-weld grinding work, the sealing plate arranged on one side of the track T-material panel is welded and sealed to the column channel steel, but not welded to the track T-material panel body; the sealing plate is arranged on one side of the track angle steel. The outer vertical partition can be prefabricated at the same time.

[0074] (5) Install the web of the track T-material to form the track T-material. Use a square to check the perpendicularity between the web and the panel. The checking method is as follows: Figure 11 As shown. Complete the fillet weld between the track panel and the track web at the outer vertical partition, with each weld segment approximately 100mm in length. During assembly, focus on controlling the web verticality to ≤1mm and the web straightness to ≤2mm.

[0075] (6) Install the outer vertical partition and the inner vertical support plate.

[0076] (7) Welding construction is carried out by segmented skip welding in the direction of track length to reduce the tendency of lower track deformation.

[0077] (8) After the lower rail assembly welding is completed, back heat is applied to release the welding stress of the lower rail assembly of the dock boom truck.

[0078] (v) In step S5, the construction method of the upper and lower tracks of the dock boom car includes the following steps.

[0079] (1) Based on the structural characteristics of the section to which the dock boom car under the track assembly belongs, determine the construction base and construction process of the section assembly.

[0080] The construction process involves using the outer dock wall as a framework for each section. Figure 15 As shown, the outer dock wall assembly is first used as a base, and the inner dock wall large intermediate assembly and the top deck intermediate assembly are installed in sequence. Then, the dock boom car upper track assembly and the dock boom car lower track assembly are installed.

[0081] (2) The outer dock wall is assembled and the inner dock wall large intermediate assembly and the top deck intermediate assembly are installed in sequence to form the main body of the segment. Then the internal welding of the segment is completed.

[0082] (3) After completing the internal welding of the sections, install the upper rail assembly and the lower rail assembly, such as Figure 16 As shown. Pay attention to controlling the flatness and straightness of the upper and lower track assembly panels of the dock boom truck, the height of the panel from the top deck, and the width of the panel (side) from the inner dock wall.

[0083] (4) The height and width spacing of the upper and lower rails on the boom truck during the assembly of the upper and lower rails are as follows: Figure 17 As shown. The straightness of the track is controlled during the assembly and welding process.

[0084] (vi) In step S6, the construction method of the upper and lower rails of the dock boom car includes the following steps: (1) Construction of the normal group of the upper and lower rails of the dock boom car.

[0085] (2) Controlling the docking accuracy of the upper and lower tracks during the overall construction phase. Requirements for the working surface of the upper track: smooth after welding, with a residual height of less than 0.5mm on the outer side, midship side, and upper surface, and 1-2mm on the lower surface. Requirements for the working surface of the lower track: smooth after welding, with a residual height of less than 0.5mm, such as... Figure 18 As shown.

[0086] (vii) In step S7, the method of merging the upper and lower rail sections of the dock in the dock includes the following steps: (1) After the merging of the corresponding sections in the floating dock area is completed, the pontoon sections are merged.

[0087] (2) Controlling the docking accuracy of the upper and lower rails during the dock assembly stage. Requirements for the working surface of the upper rail main body: smooth after welding, with a residual height of less than 0.5mm on the outer side, midship side, and upper surface, and 1-2mm on the lower surface. Requirements for the working surface of the lower rail main body: smooth after welding, with a residual height of less than 0.5mm, such as... Figure 18 As shown.

[0088] This embodiment analyzes the working principle and operating characteristics of the boom dock equipment, and rationally designs the construction process methods for the upper and lower rails of the boom dock, including assembly, segmentation, final assembly, and closing. It also rationally decomposes the precision requirements of each stage, improving construction efficiency while ensuring construction quality, and achieving high-precision construction of the upper and lower rail structures of the boom dock, thereby meeting the operational requirements of the boom dock equipment.

[0089] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A high-precision construction method for a dock-mounted vehicle track structure, characterized in that, Includes the following steps: S1. Analyze the working principles of the load-bearing wheels and guide wheels of the boom truck's traveling mechanism, as well as the structural forms of the upper and lower tracks of the boom truck; based on the working principles and operational requirements of the boom truck equipment, analyze the working principles of each action mechanism of the boom truck, the working principles and working loads of the boom truck's load-bearing frame, load-bearing wheel group, and guide wheel group, propose the precision requirements for the final completed state of the upper and lower tracks of the boom truck, and determine the priority of various precision indicators; determine the segmented and overall section division of the boom truck's dock wall area structure, and the assembly division of the upper and lower tracks of the boom truck's segments; determine the assembly construction base surface of the upper and lower tracks of the boom truck, the assembly construction base surface of the corresponding segments, and the overall section construction base surface of the dock wall area; S2, Side bending control of the boom truck track plate unloading; S3. Assembly and fabrication of the rail structure on the boom truck; S4. Assembly and fabrication of the under-rail structure of the boom truck; S5, the construction of the upper and lower tracks of the boom truck; S6, the construction of the entire section including the upper and lower tracks of the dock boom truck; S7. The upper and lower rails of the dock boom car are assembled and constructed in the dock. Step S2 specifically includes the following steps: S21. Based on the length requirements of the upper and lower rails of the dock boom truck and in combination with the market supply specifications of rail plates, determine the main rail plate width scheme of the upper and lower rails of the dock boom truck. The rail plates are cut along the entire length of a single segment without setting any joints in the ship length direction. S22. The track slabs are cut using a multi-head flame cutting machine, which cuts several track slabs at the same time. S23. Prioritize the lateral bending control requirements during the track slab cutting stage, while also considering the track slab cutting allowance loss. Determine the track slab width comprehensively to ensure that the temperature on both sides of the track slab is equal during the cutting process. Step S3 specifically includes the following steps: S32. Based on the structural characteristics of the boom lift track and the layout of the pre-embedded iron at the boom lift track assembly construction site, determine the form of the special jig for boom lift track assembly. S33. Before mounting the track T-material panel, check the straightness of the track T-material panel. If the straightness is out of tolerance or there is a side bend, adjust the straightness of the track T-material panel by mechanical straightening or water and fire straightening according to the degree of side bend. S34. The upper part of the track T-material panel is sealed with the sealing plates arranged on both sides of the track T-material panel and the column channel steel, but not welded to the track T-material panel body; the outer vertical partition and the inner vertical partition are prefabricated at the same time. S35. Install the web of the track T-material to form the track T-material. Use a square to check the perpendicularity between the web and the panel. Complete the fillet weld between the track panel and the track web at the inner vertical partition, with each weld length being 100mm. During the assembly process, control the perpendicularity of the web to ≤1mm and the straightness of the web to ≤2mm. S36. Install the outer support plate, outer horizontal partition, outer vertical partition, inner vertical partition, and inner horizontal reinforcement in sequence to form a complete dock boom car track assembly. S37. Welding construction is carried out using the segmented skip welding method along the length of the track. At the same time, the welding is carried out symmetrically on the left and right sides with the track web as the boundary. The remaining inner horizontal ribs are welded at an angle to the track web, and the outer horizontal partitions are welded at an angle to the track web. Welding is completed after the assembly is turned 90°. S38. After the upper rail assembly welding is completed, back heat is applied to release the welding stress of the upper rail assembly on the dock boom vehicle.

2. The high-precision construction method for a dock-mounted vehicle track structure according to claim 1, characterized in that, Step S4 specifically includes the following steps: S42. Based on the structural characteristics of the boom truck's lower track and the layout of the pre-embedded iron at the boom truck's lower track assembly construction site, determine the form of the special jig for the boom truck's lower track assembly. S43. Before mounting the track T-material panel, check the straightness of the track T-material panel. If the straightness is out of tolerance or there is a side bend, adjust the straightness of the track T-material panel by mechanical straightening or water and fire straightening according to the degree of side bend. S44. The sealing plate on one side of the track T-material panel is welded and sealed to the column channel steel, but not welded to the track T-material panel body; the sealing plate is arranged on one side of the track angle steel; the outer vertical partition is prefabricated simultaneously. S45. Install the web of the track T-material to form the track T-material. Use a square to check the perpendicularity between the web and the panel. Complete the fillet weld between the track panel and the track web at the outer vertical partition, with each weld length being 100mm. During the assembly process, control the perpendicularity of the web to ≤1mm and the straightness of the web to ≤2mm. S46. Install the outer vertical partition and the inner vertical support plate; S47. Welding construction shall be carried out using the segmented skip welding method along the length of the track; S48. After the lower rail assembly welding is completed, back heat is applied to release the welding stress of the lower rail assembly of the dock boom vehicle.

3. The high-precision construction method for a dock boom car track structure according to claim 2, characterized in that, Step S5 specifically includes the following steps: S52. The outer dock wall assembly is installed on the upper frame, and the inner dock wall large intermediate assembly and the top deck intermediate assembly are installed in sequence to form the main body of the segment. After that, the internal welding of the segment is completed. S53. After completing the internal welding of the sections, install the upper rail assembly and the lower rail assembly. S54. Control the height and width spacing of the upper and lower rails during the assembly and welding process of the dock boom truck, and control the straightness of the rails during assembly and welding.

4. The high-precision construction method for a dock-mounted vehicle track structure according to claim 3, characterized in that, Step S6 specifically includes the following steps: S61, the normal assembly construction of the section to which the upper and lower tracks of the dock boom car belong; S62. Control the docking accuracy of the upper and lower tracks during the overall construction phase; Requirements for the working surface of the main track: after welding, it should be ground smooth, with the excess height on the outer side, midship side and upper surface less than 0.5mm, and the excess height on the lower surface 1-2mm; Requirements for the working surface of the lower track main body: after welding, it should be ground smooth, and the excess height should be less than 0.5mm.

5. The high-precision construction method for a dock boom car track structure according to claim 4, characterized in that, Step S7 specifically includes the following steps: S71. After the corresponding sections of the floating dock pontoon area are joined together, the pontoon sections are joined together. S72. Controlling the docking accuracy of the upper and lower tracks during the dock closure construction phase; Requirements for the working surface of the main track: after welding, it should be ground smooth, with the excess height on the outer side, midship side and upper surface less than 0.5mm, and the excess height on the lower surface 1-2mm; Requirements for the working surface of the lower track main body: after welding, it should be ground smooth, and the excess height should be less than 0.5mm.

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