A Method for Integrally Transporting the Assembled Semi-circular Girder and Upper Cross Beam

Abstract

The present invention discloses a method for the overall transportation after the assembly of a semi-circular girder and an upper cross beam, which relates to the technical field of the assembly of gantry cranes. The transportation includes the following steps: the semi-circular girder is assembled with the gusset plate of the upper cross beam through a connecting plate; a jacking and supporting jig is arranged at the bottom of the semi-circular girder; a transportation tooling is arranged at the bottom of the semi-circular girder; the top of the transportation tooling is padded and solidified with a cushion block between the bottom of the semi-circular girder; the connecting plate of the semi-circular girder and the gusset plate of the upper cross beam are padded and solidified with a cushion block; the semi-circular girder and the upper cross beam are temporarily supported by a channel steel; and the transportation is carried out by a flatbed truck. The advantages of the present invention are as follows: before transportation, the transportation tooling is installed at the bottom of the semi-circular girder to ensure the stability of the overall structure during the overall transportation, and it is not easy to generate shaking during the transportation process, thus improving the transportation efficiency; the gap between the semi-circular girder and the upper cross beam is eliminated and temporarily supported to ensure the firmness between the semi-circular girder and the upper cross beam, and the assembly quality of the gantry crane is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of gantry crane assembly, and particularly relates to a method for the overall transportation of a semi-circular girder and an upper crossbeam after assembly. Background Art

[0002] The gantry crane, also known as the rail-mounted crane, is mainly a device used for loading and unloading containers in the yard. The gantry crane often runs on the steel rails of coastal terminals. The conventional structure of the existing gantry crane adopts a double-root rectangular box girder design type, and the wind force coefficient of its main girder is relatively high. To meet the requirements of low wind resistance, good rigidity, and non-rail gnawing of the main structure of the gantry crane, the girder of the gantry crane is set as semi-circular.

[0003] When assembling the gantry crane, first assemble the semi-circular girder and the upper crossbeam, and then transport the assembled girder and upper crossbeam as a whole to the hoisting position in the general assembly site, and assemble them with the rigid leg and flexible leg of the gantry crane after hoisting. However, due to the arc-shaped structure at the bottom of the semi-circular girder, it is difficult to ensure the stability of the overall structure of the girder and the upper crossbeam during the overall transportation, the transportation process is prone to shaking, the transportation efficiency is relatively low, and there is a gap between the top of the girder and the upper crossbeam, so it is easy to cause asynchronous stress between the girder and the upper crossbeam during transportation, resulting in shaking between the girder and the upper crossbeam, affecting the firmness between the girder and the upper crossbeam, and the assembly quality of the gantry crane is affected to a certain extent. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for the overall transportation of a semi-circular girder and an upper crossbeam after assembly, which can solve the problems in the prior art that it is difficult to ensure the stability of the overall structure during the overall transportation of the assembled girder and upper crossbeam, the transportation process is prone to shaking, the transportation efficiency is relatively low, the shaking between the girder and the upper crossbeam during transportation affects the firmness between the girder and the upper crossbeam, and the assembly quality of the gantry crane is affected to a certain extent.

[0005] To solve the above technical problems, the technical solution of the present invention is as follows: including the following steps:

[0006] S1. Install the semi-circular girder below the upper crossbeams on both sides of the gantry crane. Node plates are fixed below the upper crossbeams, and the upper part of the semi-circular girder is installed and fixed to the node plates through connecting plates, and the semi-circular girder and the upper crossbeams on both sides are assembled into a whole;

[0007] S2. Hoist the assembled whole of the semi-circular girder and the upper crossbeam onto the jacking and resting jig, and arrange the jacking and resting jigs on both sides of the bottom of the semi-circular girder respectively according to the center of gravity position of the assembled whole of the semi-circular girder and the upper crossbeam;

[0008] S3. Arrange transfer tooling at several positions at the bottom of the semi-circular girder. The semi-circular girder is supported by the transfer tooling, and the bottom of the transfer tooling is fixed to the top of the flatbed truck. Flatbed trucks are arranged on both sides of the semi-circular girder respectively;

[0009] S4. Pad and solidify between the top of the transfer tooling and the arc structure at the bottom of the semi-circular girder with cushion blocks;

[0010] S5. Pad and solidify between the connecting plate of the semi-circular girder and the gusset plate of the upper cross beam with cushion blocks. Fix the cushion blocks and the gusset plate of the upper cross beam with clamps. If there are still gaps, pad and weld firmly after padding with thin plates;

[0011] S6. Make temporary support between the semi-circular girder and the upper cross beam with channel steel. The upper end of the channel steel is welded and fixed to the matching bars of the upper cross beam. The lower end of the channel steel is padded with steel plates, and the channel steel and the steel plates are intermittently welded and fixed. The steel plates and the semi-circular girder are not welded but are set closely;

[0012] S7. Transfer the assembled whole of the semi-circular girder and the upper cross beam to the position to be hoisted at the general assembly site of the gantry crane by the flatbed truck.

[0013] Further, in the step S3, the installation and removal of the transfer tooling are coordinated by a forklift. The structure of the transfer tooling is:

[0014] The transfer tooling includes a bottom plate, support frames and support plates. The bottom plate is horizontally arranged. Support frames are symmetrically arranged on both sides at the top of the bottom plate. Support plates are respectively connected to the tops of the support frames on both sides. The support plate has a first inclined plate, a second inclined plate and a middle plate with different inclinations. The middle plate is respectively connected to the second inclined plates on both sides. The second inclined plates on both sides are respectively connected to the first inclined plate. The first inclined plate and the second inclined plate are arranged corresponding to the arc structure at the bottom of the semi-circular girder;

[0015] The top of the support frame is connected to the fixing ear on the side of the semi-circular girder through a rope;

[0016] Pad and solidify between the support plate and the bottom of the semi-circular girder with cushion blocks.

[0017] Further, in the step S4, after padding and solidifying between the transfer tooling and the semi-circular girder with cushion blocks, pad and solidify between the top of the flatbed truck and the bottom of the semi-circular girder with sleepers and wooden boards.

[0018] Further, in the step S7, when transferring the assembled whole of the semi-circular girder and the upper cross beam, the two flatbed trucks move synchronously and reduce the speed when turning and at slopes.

[0019] Further, in step S7, after the overall transfer of the assembled semi-circular girder and upper crossbeam is completed, remove the transfer tooling and pads. After the general assembly is hoisted in place, remove the channel steel supports and grind and touch up the paint.

[0020] The advantages of the present invention are as follows: Before the overall structure transfer after the assembly of the semi-circular girder and the upper crossbeam, first install the transfer tooling at the bottom of the semi-circular girder, and pad it solid between the transfer tooling and the semi-circular girder to ensure the stability of the overall structure during the overall transfer of the semi-circular girder at the bottom of the arc structure. The transfer process is not prone to shaking, improving the transfer efficiency;

[0021] Pad the connection plate of the semi-circular girder and the joint plate of the upper crossbeam solidly to eliminate the gap between the semi-circular girder and the upper crossbeam. And temporarily support between the semi-circular girder and the upper crossbeam with channel steel to avoid asynchronous stress between the semi-circular girder and the upper crossbeam during transfer. It is not easy to generate shaking between the semi-circular girder and the upper crossbeam, ensuring the firmness between the semi-circular girder and the upper crossbeam, and guaranteeing the assembly quality of the gantry crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall layout of the transfer tooling after the assembly of the semi-circular girder and the upper crossbeam of the present invention;

[0023] Figure 2 is Figure 1 the cross-sectional view taken along line C-C in

[0024] Figure 3 is Figure 2 the cross-sectional view taken along line B-B in

[0025] Figure 4 is Figure 2 the enlarged schematic diagram of the structure at position I in

[0026] Figure 5 It is a schematic diagram of the structure of the transfer tooling of the present invention. EMBODIMENTS

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments can enable those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention within the scope of the described embodiments. Embodiment 1

[0028] As Figures 1-3 shown, the following technical solutions are adopted in this specific embodiment: including the following steps:

[0029] S1. Install the semi-circular girder 1 under the upper cross beam 2 on both sides of the gantry crane. A gusset plate 3 is fixed under the upper cross beam 2. The upper part of the semi-circular girder 1 is installed and fixed to the gusset plate 3 through a connecting plate 4, and the semi-circular girder 1 and the upper cross beams 2 on both sides are assembled into a whole.

[0030] S2. Hoist the whole assembled by the semi-circular girder 1 and the upper cross beam 2 onto the jacking and resting support 5. According to the center of gravity position of the whole assembled by the semi-circular girder 1 and the upper cross beam 2, arrange the jacking and resting support 5 on both sides of the bottom of the semi-circular girder 1. In this embodiment, the total weight of the assembled whole is 155t.

[0031] S3. Arrange transfer tooling 6 at several positions on the bottom of the semi-circular girder 1. The semi-circular girder 1 is supported by the transfer tooling 6. The bottom of the transfer tooling 6 is fixed to the top of the flatbed truck 7. Flatbed trucks 7 are arranged on both sides of the semi-circular girder 1. In this embodiment, one transfer tooling 6 is arranged on one side of the semi-circular girder 1, and one flatbed truck 7 is set at the bottom of this transfer tooling 6, with a load of about 43t on this side. Two transfer toolings 6 are arranged on the other side, and the same flatbed truck 7 is set at the bottom of these two transfer toolings 6 here, with a load of about 112t on this side. The installation and removal of the transfer tooling 6 are carried out in cooperation with a forklift, and the hoist cannot be directly loosened for disassembly.

[0032] S4. Pad the space between the top of the transfer tooling 6 and the bottom arc structure of the semi-circular girder 1 with pads, and further pad the space between the top of the flatbed truck 7 and the bottom of the semi-circular girder 1 with sleepers and wooden boards.

[0033] First, install the transfer tooling 6 at the bottom of the semi-circular girder 1, and pad the space between the transfer tooling 6 and the semi-circular girder 1 with pads to ensure the stability of the overall structure of the semi-circular girder 1 at the bottom of the arc structure during the overall transfer, so that the transfer process is not prone to shaking and the transfer efficiency is improved.

[0034] S5. As Figure 4 shown, pad the space between the connecting plate 4 of the semi-circular girder 1 and the gusset plate 3 of the upper cross beam 2 with a pad 8, and fix the pad 8 and the gusset plate of the upper cross beam 2 with a clamp. If there are still gaps, pad them with thin plates and then weld them firmly.

[0035] S6. Make temporary support between the semi-circular girder 1 and the upper cross beam 2 through a channel steel 9. The upper end of the channel steel 9 is welded and fixed to the upper cross beam 2 in alignment. The lower end of the channel steel 9 is padded with a steel plate, and the channel steel 9 and the steel plate are intermittently welded and fixed. The steel plate and the semi-circular girder 1 are not welded but are closely arranged. In this embodiment, the included angle between the upper end of the channel steel 9 and the bottom surface of the upper cross beam 2 is 97°.

[0036] Pad the joint plate 4 of the semi-circular girder 1 and the gusset plate 3 of the upper cross beam 2 to eliminate the gap between the semi-circular girder 1 and the upper cross beam 2. Then, temporarily support between the semi-circular girder 1 and the upper cross beam 2 with channel steel 9 to avoid asynchronous stress on the semi-circular girder 1 and the upper cross beam 2 during transportation. It is not easy to produce shaking between the semi-circular girder 1 and the upper cross beam 2, ensuring the firmness between the semi-circular girder 1 and the upper cross beam 2, and guaranteeing the assembly quality of the gantry crane.

[0037] S7. Use the flatbed truck 7 to transport the assembled whole of the semi-circular girder 1 and the upper cross beam 2 to the hoisting position waiting for assembly in the gantry crane general assembly site. During transportation, the two flatbed trucks 7 operate synchronously, reduce speed at turns and slopes, and pass slowly. After the transportation of the assembled whole of the semi-circular girder 1 and the upper cross beam 2 is completed, remove the transportation tooling 6 and the cushion block 8. After the general assembly is hoisted in place, remove the support of the channel steel 9 and grind and touch up the paint. Embodiment 2

[0038] The transportation steps of this embodiment are the same as those of Embodiment 1, except that: specifically, the structure of the transportation tooling 6 in step S3 is as follows:

[0039] As Figure 5 shown, the transportation tooling 6 includes a bottom plate 61, a support frame 62 and a support plate. The bottom plate 61 is horizontally arranged. Combined Figure 1 , symmetrically arranged support frames 62 are provided on both sides of the top of the bottom plate 61. Support plates are respectively connected to the tops of the support frames 62 on both sides. The support plate has a first inclined plate 63, a second inclined plate 64 and a middle plate 65 with different inclinations. The second inclined plates 64 are respectively connected to both sides of the middle plate 65. The second inclined plates 64 on both sides are respectively connected to the first inclined plate 63. The first inclined plate 63 and the second inclined plate 64 are arranged corresponding to the bottom arc structure of the semi-circular girder 1. The space between the support plate and the bottom of the semi-circular girder 1 is padded with a cushion block. The top of the support frame is connected to the fixing ear on the side of the semi-circular girder 1 through a rope 10.

[0040] Support the bottom arc structure of the semi-circular girder 1 through the support plate, and pad the space between the bottom of the semi-circular girder 1 and the support plate with a cushion block to ensure good fit between the transportation tooling 6 and the bottom of the semi-circular girder 1, improving stability during transportation. Symmetrically arranged support frames 62 are provided on both sides of the top of the bottom plate 61, and support plates are respectively arranged on the support frames 62, which can increase the support surface of the transportation tooling 6 for the semi-circular girder 1 and have a better support effect.

[0041] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A method for the overall transportation of a semi-circular girder after being assembled with an upper crossbeam, characterized in that: It includes the following steps: S1. Install the semi-circular girder below the upper cross beams on both sides of the gantry crane. There are gusset plates fixed below the upper cross beams. The upper part of the semi-circular girder is installed and fixed to the gusset plates through connecting plates, and the semi-circular girder and the upper cross beams on both sides are assembled into a whole; S2. Hoist the whole assembled by the semi-circular girder and the upper cross beam onto the jacking and resting jig. According to the center of gravity position of the whole assembled by the semi-circular girder and the upper cross beam, arrange the jacking and resting jigs on both sides of the bottom of the semi-circular girder respectively; S3. Arrange transfer tools at several positions at the bottom of the semi-circular girder. The semi-circular girder is supported by the transfer tools. The bottom of the transfer tools is fixed to the top of the flatbed truck, and flatbed trucks are arranged on both sides of the semi-circular girder respectively; In the step S3, the installation and removal of the transfer tools are coordinated by a forklift. The structure of the transfer tool is: The transfer tool includes a bottom plate, a support frame and a support plate. The bottom plate is horizontally arranged. Support frames are symmetrically arranged on both sides of the top of the bottom plate. Support plates are respectively connected to the tops of the support frames on both sides. The support plate has a first inclined plate, a second inclined plate and a middle plate with different inclinations. The middle plate is respectively connected to the second inclined plates on both sides. The second inclined plates on both sides are respectively connected to the first inclined plate. The first inclined plate and the second inclined plate are arranged corresponding to the bottom arc structure of the semi-circular girder; The top of the support frame is connected to the fixed ear on the side of the semi-circular girder through a rope; The space between the support plate and the bottom of the semi-circular girder is padded solid with a cushion block; S4. The space between the top of the transfer tool and the bottom arc structure of the semi-circular girder is padded solid with a cushion block; In the step S4, after the space between the transfer tool and the semi-circular girder is padded solid with a cushion block, the top of the flatbed truck and the bottom of the semi-circular girder are padded solid with sleepers and wooden boards again; S5. Pad the space between the connecting plate of the semi-circular girder and the gusset plate of the upper cross beam with a cushion block. The cushion block and the gusset plate of the upper cross beam are fixed with a clamp. If there is still a gap, pad it solid with a thin plate and then weld it firmly; S6. Make temporary support between the semi-circular girder and the upper cross beam through a channel steel. The upper end of the channel steel is welded and fixed to the counter rib of the upper cross beam. The lower end of the channel steel is padded with a steel plate, and the channel steel and the steel plate are intermittently welded and fixed. The steel plate and the semi-circular girder are not welded but are closely arranged; S7. Transfer the whole assembled by the semi-circular girder and the upper cross beam to the position to be hoisted at the general assembly site of the gantry crane through the flatbed truck; In the step S7, when transferring the whole assembled by the semi-circular girder and the upper cross beam, the two flatbed trucks move synchronously, and the speed is reduced when turning and on slopes during the transfer; 2. A method for the overall transfer after the assembly of a semi-circular girder and an upper crossbeam according to claim 1, characterized in that: In the step S7, after the transfer of the whole assembled by the semi-circular girder and the upper cross beam is completed, remove the transfer tool and the cushion block. After the general assembly is hoisted in place, remove the channel steel support and grind and touch up the paint.

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