Rail-mounted gantry crane girder hoisting process

Abstract

The invention relates to the technical field of rail-mounted gantry crane hoisting, in particular to a rail-mounted gantry crane main beam hoisting process which comprises the following steps that rail-mounted gantry crane main beams are spliced in the direction parallel to a cart rail, and the main beams comprise the first main beam and the second main beam; the current first center-of-gravity position of the first main beam and the second center-of-gravity position after landing of the landing leg are calculated, a truck-mounted crane is arranged according to the first center-of-gravity position and the second center-of-gravity position, and the truck-mounted crane integrally lifts the first main beam to exceed the position above the landing leg and then turns to be aligned with the center of the landing leg to be located; calculating a current third gravity center position of the second main beam and a fourth gravity center position after the landing leg is located, arranging a truck crane according to the third gravity center position and the fourth gravity center position, lifting the second main beam by the truck crane, steering below the first main beam, integrally lifting to exceed the position above the landing leg, steering again, and aligning with the center of the landing leg to be located. According to the hoisting process, the influence on the wharf flood prevention embankment is reduced, and the flexibility and adaptability of the hoisting process are improved.

Description

Technical Field

[0001] The invention relates to the technical field of rail crane hoisting, and in particular to a rail crane main beam hoisting process. Background Art

[0002] In the field of port logistics, rail cranes (rail-mounted container gantry cranes) are key loading and unloading equipment, which realize efficient loading and unloading of containers by moving along ground tracks. With the dual requirements of environmental protection and efficiency, inland ports have begun to adopt rail cranes with ship loading and unloading functions to meet the growing logistics needs. These rail cranes usually have a large reach, span and back reach to meet the diverse loading and unloading needs. However, due to its size and weight, the hoisting process of the rail crane main beam has become a technical challenge.

[0003] At present, the main beam of the rail crane is usually transported to the wharf in sections and then assembled. Due to the length limit, the main beam is often transported in three sections and assembled after arriving at the wharf. The traditional assembly plan is to assemble the main beam perpendicular to the direction of the trolley track and then use two truck cranes to lift it. This method has some limitations, such as affecting the construction of the wharf flood control embankment and difficult coordination.

[0004] Therefore, in the prior art, the hoisting process of the rail crane main beam faces the following problems:

[0005] 1. The main beam is assembled perpendicular to the direction of the trolley track, which affects the construction of the wharf flood control embankment and is difficult to coordinate.

[0006] 2. Two truck cranes are required for lifting, which increases the complexity and cost of lifting. Summary of the invention

[0007] In view of the shortcomings of the prior art, the purpose of an embodiment of the present invention is to provide a rail crane main beam lifting process, which is applied to a rail crane with ship loading and unloading functions at the front terminal of an inland port. By assembling the main beam parallel to the direction of the trolley track and utilizing the single hook lifting process of a car crane, the impact on the flood control dike of the terminal can be reduced, the lifting cost can be reduced, and the flexibility and adaptability of the lifting process can be improved.

[0008] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0009] A rail crane main beam hoisting process comprises the following steps: assembling the rail crane main beam parallel to the direction of a trolley track, the main beam comprising a first main beam and a second main beam; calculating a current first center of gravity position of the first main beam and a second center of gravity position after the legs are placed, arranging a mobile crane according to the first center of gravity position and the second center of gravity position, lifting the first main beam as a whole to a position above the legs and then turning to align with the center of the legs and placing it in position; calculating a current third center of gravity position of the second main beam and a fourth center of gravity position after the legs are placed, arranging the mobile crane according to the third center of gravity position and the fourth center of gravity position, lifting the second main beam and turning below the first main beam, continuing to lift, lifting as a whole to a position above the legs and turning again to align with the center of the legs and placing it in position.

[0010] Optionally, the first main beam is the main beam on the electrical room side, and the second main beam is the main beam on the non-electrical room side.

[0011] Optionally, the main beam on the electrical room side and the main beam on the non-electrical room side are both located on the inner sides of the two trolley tracks and are arranged in parallel and staggered manner.

[0012] Optionally, install the gantry lower beam and outriggers before lifting the main beam.

[0013] Optionally, calculate the first position of the truck crane: take the first position of the truck crane as a circle and use the distance from the first center of gravity to the first position of the truck crane as a radius to rotate the main beam on the electrical room side so that the main beam on the electrical room side is aligned with the center of the leg after rotation to determine the first position of the truck crane.

[0014] Optionally, main beam lifting points are symmetrically arranged according to the first center of gravity position of the main beam on the electrical room side, the main beam lifting points and the internal partitions of the main beam are welded to the reinforcement, and a truck crane and lifting rigging are configured according to the dead weight of the main beam.

[0015] Optionally, the main beam on the electrical room side is hoisted by a mobile crane and lifted upward as a whole beyond the outriggers, then turned 90 degrees, the main beam is aligned with the center of the outriggers, and dropped above the outriggers.

[0016] Optionally, calculate the second position of the truck crane: take the second position of the truck crane as a circle and use the distance from the third center of gravity position to the second position of the truck crane as a radius to rotate the main beam on the non-electrical room side so that the main beam on the non-electrical room side is aligned with the center of the support leg after rotation to determine the second position of the truck crane.

[0017] Optionally, main beam lifting points are symmetrically arranged according to the third center of gravity position of the main beam on the non-electrical room side, main beam lifting points and internal partitions of the main beam are welded to the reinforcement, and a truck crane and lifting rigging are configured according to the dead weight of the main beam.

[0018] Optionally, the truck crane hoists the main beam on the non-electrical room side and lifts it upward as a whole to below the main beam on the electrical room side, turns to where there are no obstacles above the main beam of the non-electrical room, continues to lift it upward as a whole until it passes over the outriggers, turns to just above the outriggers, aligns the center of the main beam with the outriggers, and drops it above the outriggers.

[0019] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0020] In the rail crane main beam hoisting process described in this embodiment, the rail crane main beam is assembled parallel to the direction of the trolley track. Compared with the existing main beam assembly perpendicular to the trolley track and then hoisted by a car crane, the assembly and hoisting process of the main beam will not affect the passage of ships in the river, while reducing interference with the dock flood control dike and not being affected by the user's dock flood control dike. In addition, compared with the existing crawler crane hoisting process, the equipment entry cycle is shortened, which is more in line with the hoisting operation volume of the inland port rail crane. The hoisting equipment is low in cost, reasonable in use, and easy to adjust the production plan. The car crane can enter and exit the site at any time according to the production progress.

[0021] Advantages of additional aspects of the present invention will be given in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of main beam assembly provided by an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of hoisting the main beam on the side of the electrical room provided by an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of hoisting the main beam on the non-electrical room side provided by an embodiment of the present invention;

[0026] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Terminology explanation:

[0029] Rail crane: also known as rail-mounted container gantry crane, refers to a gantry crane that travels on tracks laid along the ground.

[0030] As introduced in the background technology, in response to the requirements of green development, inland ports have begun to upgrade their supporting facilities. Due to the restrictions of capacity planning, the frontier docks are generally equipped with rail crane equipment with ship loading and unloading functions. The rail crane has a large forward reach for loading and unloading ships, a large span for temporary stacking of containers, and some dock equipment also has a large rear reach for loading and unloading vehicles. Therefore, the main beam of the rail crane is long, heavy, and difficult to hoist. At the same time, the rail crane has the characteristics of a small number of equipment purchased in batches, so there are fewer large pieces to be hoisted, the service life of large cranes is short, and the scheduling of hoisting equipment is difficult. The berths of inland ports are relatively small, and generally do not have the ability to load and unload after the rail crane is transported to the dock as a whole by river. Usually, the scattered parts are transported by land to the user's dock for final assembly. Because the main beam is too long, it is generally divided into three sections and transported by land to the dock before being assembled into a whole for hoisting. The conventional assembly plan uses the main beam to be assembled perpendicular to the direction of the trolley track, and then two truck cranes are used to lift it. This method affects the construction of user flood control dikes and is usually difficult to coordinate.

[0031] In order to solve the above technical problems, the present invention proposes a rail crane main beam hoisting process, comprising the following steps:

[0032] like Figure 1 As shown, the main beam of the track crane is assembled parallel to the direction of the trolley track. The main beam includes a first main beam and a second main beam. The first main beam is the main beam on the electrical room side, and the second main beam is the main beam on the non-electrical room side.

[0033] like Figure 2 As shown, the current first center of gravity position of the first main beam and the second center of gravity position after the outriggers are placed are calculated, and the truck crane is arranged according to the first center of gravity position and the second center of gravity position. The truck crane lifts the first main beam as a whole to pass above the outriggers and then turns to align with the center of the outriggers and place them in position.

[0034] Calculate the current third center of gravity position of the second main beam and the fourth center of gravity position after the outriggers are placed in place, arrange the truck crane according to the third center of gravity position and the fourth center of gravity position, lift the second main beam and turn under the first main beam, continue lifting, and turn again when the overall lifting exceeds the top of the outriggers, and place it in line with the center of the outriggers.

[0035] In the rail crane main beam hoisting process described in this embodiment, the rail crane main beam is assembled parallel to the direction of the trolley track. Compared with the existing main beam assembly perpendicular to the trolley track and then lifted by a car crane, the assembly and hoisting process of the main beam will not affect the passage of ships in the river, while reducing interference with the dock flood control dike and not being affected by the user's dock flood control dike. In addition, compared with the existing crawler crane hoisting process, the equipment entry cycle is shortened, which is more in line with the inland port rail crane hoisting operation volume, and the hoisting equipment cost is low and the use is reasonable.

[0036] The main beams on the electrical room side and the main beams on the non-electrical room side are both located inside the two trolley tracks and are arranged in parallel and staggered. This arrangement can maximize the use of the existing space and provide convenience for subsequent hoisting operations. The parallel and staggered arrangement can minimize mutual interference between the main beams during the hoisting process, ensuring that the hoisting process is in place in one go.

[0037] Before hoisting the main beam, install the gantry lower beam and outriggers. The implementation of this step is crucial to the entire hoisting process, because the installation quality of the lower beam and outriggers directly affects the final positioning and stability of the main beam.

[0038] Calculate the first position of the mobile crane: take the first position of the mobile crane as a circle and the distance from the first center of gravity to the first position of the mobile crane as the radius to rotate the main beam on the electrical room side so that the main beam on the electrical room side is aligned with the center of the outrigger after rotation to determine the first position of the mobile crane. The determination of this position is based on the rotation radius required by the mobile crane during the hoisting process to ensure that during the rotation of the main beam, there will be no hoisting obstacles or mismatching of the landing position due to improper position, improve the hoisting efficiency, and reduce the frequency of adjusting the vehicle position.

[0039] The main beam lifting points are symmetrically set according to the first center of gravity of the main beam on the electrical room side. The main beam lifting points and the internal partitions of the main beam are welded to the reinforcement. The truck crane and lifting slings are configured according to the dead weight of the main beam. The balance during lifting is ensured by using symmetrical lifting points and reinforcing ribs.

[0040] After the main beam on the side of the electrical room is hoisted by the truck crane and lifted upwards over the outriggers, it is turned 90 degrees, the main beam is aligned with the center of the outriggers, and it is placed above the outriggers. When finally placed, it is necessary to ensure that the connection between the main beam and the outriggers is aligned and stable, and necessary tightening operations are performed after connection to ensure the overall stability of the structure.

[0041] Calculate the second position of the mobile crane: take the second position of the mobile crane as a circle and the distance from the third center of gravity to the second position of the mobile crane as the radius to rotate the main beam on the non-electrical room side so that the main beam on the non-electrical room side is aligned with the center of the outrigger after rotation to determine the second position of the mobile crane. The determination of the second position is as important as the first position, and at the same time ensure that the main beam on the non-electrical room side can smoothly pass over the main beam on the electrical room side during the rotation process.

[0042] The truck crane hoists the main beam on the non-electrical room side and lifts it upward to the bottom of the main beam on the electrical room side. It turns to the top of the main beam in the non-electrical room without obstacles. It continues to lift upward to pass over the outriggers, turns to the top of the outriggers, aligns the center of the main beam with the outriggers, and lands above the outriggers. Ensure that there are no obstacles affecting the movement trajectory of the main beam during the lifting process, and finally complete the landing smoothly.

[0043] In order to make the technical solution provided by the embodiment of the present invention clearer, the hoisting process provided by the embodiment of the present invention is described by an example:

[0044] like Figure 1 As shown, assemble the rail crane in the designated area of ​​the front wharf of the user's port, and arrange the rail crane components as shown in the figure. Take the center of gravity of the main beam after the legs are placed as the reference, and assemble it parallel to the trolley track within the working range of the truck crane.

[0045] like Figure 2 As shown in the figure, after the installation of the lower crossbeam and outriggers of the gantry is completed, the main beam on the side of the electrical room is hoisted by a single hook of the truck crane. Before hoisting, the center of gravity of the main beam is calculated; the main beam hoisting points are symmetrically set according to the center of gravity, and the main beam hoisting points and the internal partitions of the main beam are welded; the truck crane and slings are configured according to the dead weight of the main beam; the truck crane is positioned as shown in the figure, and the center of gravity of the main beam before and after hoisting is within the working range of the truck crane. After the main hook is equipped with ropes, it is hooked to the main beam hoisting point, and the whole is slowly lifted upward and exceeds the outriggers, then turned 90°, and rotated counterclockwise from position state ① to position state ②; the main beam is aligned with the center of the outriggers, and slowly dropped to the top of the outriggers.

[0046] like Figure 3 As shown in the figure, after the main beam on the electrical room side is installed, the main beam on the non-electrical room side is hoisted by a single hook of the truck crane. Before hoisting, calculate the center of gravity of the main beam; symmetrically set the main beam hoisting points according to the center of gravity, and weld the reinforcement of the main beam hoisting points and the internal partitions of the main beam; configure the truck crane and slings according to the deadweight of the main beam; stand the truck crane in the position shown in the figure, the center of gravity of the main beam before and after hoisting is within the working range of the truck crane, and hook the main hook to the main beam hoisting point after the main hook is equipped with ropes, and slowly lift the whole upward to the bottom of the main beam on the electrical room side, turn left until there are no obstacles above the main beam, and rotate counterclockwise from position state ① to position state ②; continue to slowly lift the whole upward until it passes over the outrigger, and rotate counterclockwise from position state ② to position state ③; align the center of the main beam with the outrigger, and slowly drop it to the top of the outrigger.

[0047] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A rail crane main beam hoisting process, characterized in that: The following steps are involved: Assemble the rail crane main beam parallel to the direction of the trolley track, the main beam includes a first main beam and a second main beam; Calculate the current first center of gravity position of the first main beam and the second center of gravity position after the outriggers are placed, arrange the truck crane according to the first center of gravity position and the second center of gravity position, and turn the truck crane after lifting the first main beam as a whole to pass above the outriggers, and align it with the center of the outriggers and place it in position; Calculate the current third center of gravity position of the second main beam and the fourth center of gravity position after the outriggers are placed in place, arrange the truck crane according to the third center of gravity position and the fourth center of gravity position, lift the second main beam and turn under the first main beam, continue lifting, and turn again when the overall lifting exceeds the top of the outriggers, and place it in line with the center of the outriggers.

2. The rail crane main beam hoisting process according to claim 1, characterized in that: The first main beam is the main beam on the electrical room side, and the second main beam is the main beam on the non-electrical room side.

3. The rail crane main beam hoisting process according to claim 2, characterized in that: The main beams on the electrical room side and the main beams on the non-electrical room side are both located on the inner sides of the two trolley tracks and are arranged in parallel and staggered manner.

4. The rail crane main beam hoisting process according to claim 2, characterized in that: Install the gantry lower beam and outriggers before lifting the main beam.

5. The rail crane main beam hoisting process according to claim 4, characterized in that: Calculate the first position of the truck crane: take the first position of the truck crane as a circle and use the distance from the first center of gravity to the first position of the truck crane as the radius to rotate the main beam on the electrical room side so that the main beam on the electrical room side is aligned with the center of the outrigger after rotation to determine the first position of the truck crane.

6. The rail crane main beam hoisting process according to claim 5, characterized in that: The main beam lifting points are symmetrically set according to the first center of gravity of the main beam on the electrical room side. The main beam lifting points and the internal partitions of the main beam are welded to the reinforcement. The truck crane and lifting rigging are configured according to the dead weight of the main beam.

7. The rail crane main beam hoisting process according to claim 6, characterized in that: The main beam on the side of the electrical room is hoisted by the truck crane and lifted upward as a whole beyond the outriggers, then turned 90°, the main beam is aligned with the center of the outriggers, and placed above the outriggers.

8. The rail crane main beam hoisting process according to claim 4, characterized in that: Calculate the second position of the truck crane: take the second position of the truck crane as a circle and use the distance from the third center of gravity to the second position of the truck crane as the radius to rotate the main beam on the non-electrical room side so that the main beam on the non-electrical room side is aligned with the center of the support leg after rotation to determine the second position of the truck crane.

9. The rail crane main beam hoisting process according to claim 8, characterized in that: The main beam lifting points are symmetrically set according to the third center of gravity of the main beam on the non-electrical room side. The main beam lifting points and the internal partitions of the main beam are welded to the reinforcement. The truck crane and lifting rigging are configured according to the dead weight of the main beam.

10. The rail crane main beam hoisting process according to claim 9, characterized in that: The truck crane hoists the main beam on the non-electrical room side and lifts it upward as a whole to below the main beam on the electrical room side, turns to where there are no obstacles above the main beam of the non-electrical room, continues to lift it upward as a whole until it passes over the outriggers, turns to just above the outriggers, aligns the center of the main beam with the outriggers, and drops it above the outriggers.

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