Large curved block double-vehicle combined transportation design and operation method

Abstract

The invention discloses a large curved block double-vehicle combined transportation design and operation method, and relates to the technical field of ship block transportation. The design method comprises the following steps: selecting a parallel operation mode; determining the transfer posture of the preliminary curved block; lofting is conducted on the supporting sole timber; whether the storage posture requirement of the transfer station is met or not is judged; determining a final curved block transfer posture; lofting is conducted on the block buttress; and a final transfer scheme is obtained. Through cooperation of the supporting sole timbers and the block buttresses, the application range of the flat car for transferring the curved blocks is remarkably expanded, the utilization efficiency of the flat car is improved, the problem that part of curved blocks in a shipyard are difficult to transfer and transport is solved, the effective transferring cost is reduced, and the building efficiency of the shipyard is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ship block transportation, and in particular to a design and operation method for double-car combined transportation of large curved blocks. Background Art

[0002] In modern manufacturing, hydraulic flatbed trucks are mainly used to transport heavy and large structures. They are widely used in petrochemical, heavy pressure vessels, bridges, ships and other engineering fields. When transporting with a flatbed truck, it is generally required that the transported structure can be placed stably on the transport vehicle, and the lower end of the transported structure must have a flat support surface. However, the lower end support surface of the curved section is a curved surface. If the curved section is placed directly on a flatbed truck, only part of the curved surface can be supported on the flatbed truck, and most of the curved surface is in a warped state and cannot fully contact the flatbed truck. The flatbed truck cannot provide good support for the curved section, so flatbed trucks are generally not used for transportation.

[0003] Large curved sections can also be transported by sea. Several support pipes are welded on the curved support surface of the large curved section, and the curved section falls on the barge deck with the support pipes, so that the large curved section can be transported by sea. However, this method requires adding several support pipes on the curved surface of the curved section. The workload of grinding, repairing and painting after cutting off the support pipes is large, and a large barge is required for transportation, so the overall economic benefits are poor. Summary of the invention

[0004] In view of the above-mentioned problems that the transportation equipment cannot provide good support for the current curved section transportation, the transfer operation is cumbersome, the workload is large, and the economic benefits are low, the present invention provides a design and operation method for double-car combined transportation of a large curved section.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A design method for double-car intermodal transportation of large curved sections, comprising the following steps: A1 determines whether the flatbed truck adopts front-to-back or left-to-right tandem transportation according to the structural form and external dimensions of the curved section. A2 determines the initial transfer posture of the curved section according to the transverse section of the center of gravity of the curved section, in accordance with the principle that the height of the support points on both sides of the flatbed truck is the lowest and the tangent angle between the upper surface of the supporting pad and the curved surface of the curved section is the smallest. A3 lays out several supporting pads placed on the flatbed truck to determine whether the tangent angle of the upper surface of the supporting pad meets the requirements of the static friction self-locking angle of steel and wood. If not, enter A2. A4 simulates the lifting of the curved section to determine whether the storage posture requirements of the transfer station are met. If not, enter A2. A5 determines the final transfer posture of the curved section, and determines the placement position of the supporting pads and the detailed dimensions of each supporting pad according to the final transfer posture of the curved section. A6: Loft the section of the pier of the slab according to the final transfer posture of the curved slab, determine the support height of each part of the curved slab, and configure appropriate piers for the curved slab. A7: Get the final transfer plan.

[0006] Furthermore, in A2, when determining the preliminary transfer posture of the curved section, it is also necessary to consider the center of gravity of the curved section, the state of the curved support surface, the space for flatbed trucks to enter, and the support height requirement of the curved section at the transfer station.

[0007] Furthermore, in A4, after the curved section is hoisted, the storage posture of the curved section under the assembly station and the transfer station will be deflected. The storage posture requirement of the transfer station is to ensure that the storage posture of the curved section under the transfer station and the assembly station is close.

[0008] Furthermore, in A5, the size of the supporting pads under the flatbed truck transportation condition is laid out according to the placement positions of the supporting pads, the size of each supporting pad is determined, and fine-tuning pads are configured at the same time.

[0009] A method for operating a large curved section with two vehicles for intermodal transport is based on a design method for intermodal transport of a large curved section with two vehicles as described above, and includes the following steps: B1: placing the section piers to a suitable position; connecting two flatbed trucks into a whole through a pin shaft to realize the combination of vehicles. B2: using a gantry crane to lift the curved section to the transfer station, and adjusting the height of each section pier; placing each supporting pad in a suitable position on the flatbed truck. B3: judging whether the height of each section pier meets the support height of each part of the curved section, if not, proceeding to B2; if so, placing the curved section on each section pier and proceeding to B4. B4: the flatbed truck moves to the bottom of the curved section and adjusts the relative position of the flatbed truck and the curved section. B5: the flatbed truck is lifted, and during the lifting process, the gap between the supporting pad and the curved section is checked and adjusted. B6: the flatbed truck is fully lifted, driving the curved section to detach from the section piers. B7: the flatbed truck transfers the curved section.

[0010] Furthermore, in B5, when the flatbed car roof is raised to a load of 20% of the force, the gap between the supporting pads and the curved overall section is checked.

[0011] Further, when a gap is found, the flatbed truck is lowered and reset, and the staff places fine-tuning pads at the found gap, and then the flatbed truck is re-lifted and the gap between the supporting pads and the curved section is checked again.

[0012] The beneficial effects of the present invention are as follows: the present invention reduces the gap between the supporting pads and the curved total section by laying out the supporting pads and ensuring that no large deflection angle occurs after lifting, so that the supporting pads can fully contact the curved total section, ensuring that each supporting pad can be subjected to force, and further reducing the gap by using fine-tuning pads, which can provide good support for the curved total section and avoid the problem of large post-processing workload caused by welding a number of support pipes, effectively expanding the application scope of flatbed trucks for transporting curved total sections, improving the utilization efficiency of flatbed trucks, and significantly reducing the transportation cost of curved total sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Shown is a flow chart of a design method for dual-car intermodal transport in a large curved section.

[0014] Figure 2 Shown is a flow chart of a method for operating double-car combined transport in a large curved section.

[0015] Figure 3 Shown is a side view of the curved segment when placed on the segment buttress.

[0016] Figure 4 Shown is the rear view of the curved section when placed on a double flatbed truck.

[0017] Figure 5Shown Figure 4 Side view of.

[0018] Figure 6 Shown Figure 4 A partial structural diagram shows the arrangement of the supporting pads.

[0019] Explanation of the reference numerals: 1. curved section; 2. flatbed car; 3. supporting pads; 4. section pier. DETAILED DESCRIPTION

[0020] The present invention discloses a large-scale curved section double-car combined transport design and operation method. An implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, a design method for double-car combined transportation of a large curved section includes the following steps: the first step is to determine whether the flatbed 2 adopts front-carriage or left-right-carriage combination according to the structural form and external dimensions of the curved section 1. The second step is to determine the preliminary transfer posture of the curved section 1 according to the transverse section of the center of gravity of the curved section 1, the state of the curved support surface, and other factors, and to comprehensively consider the requirements such as the space for the flatbed 2 to enter the vehicle and the height requirement of the transfer station section support. The support points on both sides of the flatbed 2 are at the lowest height, and the upper surface of the support pad 3 and the curved surface of the curved section 1 have the smallest tangent angle, according to the transverse section of the center of gravity of the curved section 1. The third step is to loft the support pad 3 of the flatbed 2 according to the determined preliminary transfer posture of the curved section 1, consider the appropriate safety factor, and judge whether the tangent angle of the upper surface of the support pad 3 meets the requirements of the static friction self-locking angle of steel and wood. If it meets the requirements, proceed to the fourth step, and if it does not meet the requirements, proceed to the second step. The fourth step is to simulate the hoisting process of the curved section 1. After the curved section 1 is hoisted, the storage posture angles of the curved section 1 at the assembly station and the transfer station will deflect, which may easily lead to the inability of the supporting pads 3 to effectively support the curved section 1. Therefore, when the curved section 1 is hoisted from the assembly station to the transfer station, the storage postures of the two need to be as close as possible. If the storage posture of the curved section 1 at the assembly station is significantly different from the storage posture of the curved section 1 at the transfer station, it is necessary to enter the second step to readjust the initial transfer posture of the curved section 1. The fifth step is to determine the final transfer posture of the curved section 1, and determine the placement position of the supporting pads 3 according to the final transfer posture of the curved section 1. Then, according to the placement position of the supporting pads 3, the size of the supporting pads 3 under the transportation condition of the flatbed truck 2 is lofted, the detailed size of each supporting pad 3 is determined, and at the same time, a small-sized fine-tuning pad is configured. The fine-tuning pad is used to adjust the gap between the curved section 1 and the supporting pad 3. Step 7: Determine the final transfer plan.

[0022] like Figure 2As shown, a large-scale curved section double-car intermodal operation method is based on the above-mentioned large-scale curved section double-car intermodal design method, including the following steps: Figure 3 As shown, in the first step, according to the transfer plan, the main section piers 4 are placed at a suitable position on the ground, and the height of each main section pier 4 is adjusted so that the height of each main section pier 4 matches the required support height of each part of the curved main section 1 obtained by staking out the section of the main section pier 4. The two flatbed trucks 2 are connected into a whole by pins, and the front and rear trucks or the left and right trucks are selected as needed. Figure 4 , Figure 5 as well as Figure 6 As shown, in the second step, the curved section 1 is lifted to the transfer station by a gantry crane, and the section pier 4 is fixed on the ground. According to the transfer plan, each supporting pad 3 is placed at a suitable position on the flatbed truck 2. In the third step, it is determined whether the actual height of each section pier 4 meets the support height of each part of the curved section 1. If not, the second step is entered; if it is satisfied, the curved section 1 is placed on the top of each section pier 4 and the fourth step is entered. In the fourth step, the flatbed truck 2 moves to the bottom of the curved section 1 and adjusts the relative position of the flatbed truck 2 and the curved section 1. In the fifth step, the flatbed truck 2 is lifted. When the flatbed truck 2 is lifted to a load of 20% of the force, the gap between the supporting pad 3 and the curved section 1 is checked. When a gap is found, the flatbed truck 2 is reset, and the staff configures a fine-tuning pad of appropriate size at the gap found, and then the flatbed truck 2 is lifted again and the gap between the supporting pad 3 and the curved section 1 is checked again to determine whether the supporting pad 3 is evenly stressed. Step 6: The flatbed truck 2 is fully raised to drive the curved section 1 away from the section support pier 4. Step 7: The flatbed truck 2 transfers the curved section 1.

[0023] The present invention reduces the gap between the supporting pads and the curved total section by laying out the supporting pads and ensuring that no large deflection angle occurs after lifting, so that the supporting pads can fully contact the curved total section, ensuring that each supporting pad can be stressed, and further reducing the gap by fine-tuning the pads, which can provide good support for the curved total section and avoid the problem of large post-processing workload caused by welding a number of support pipes. The application scope of flatbed trucks for transporting the curved total section 1 is effectively expanded, the utilization efficiency of flatbed trucks is improved, and the transportation cost of the curved total section is significantly reduced.

[0024] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A design method for double-car intermodal transport in a large curved section, characterized in that: The following steps are involved: A1 determines whether the flatbed truck (2) is to be used in parallel front and back or in parallel left and right according to the structural form and external dimensions of the curved overall section (1); A2 determines the preliminary transfer posture of the curved section (1) according to the transverse section of the center of gravity of the curved section (1) and the principle that the height of the supporting points on both sides of the flatbed vehicle (2) is the lowest and the tangent angle between the upper surface of the supporting pad (3) and the curved surface of the curved section (1) is the smallest; A3 lays out a plurality of support pads (3) placed on the flatbed truck (2) to determine whether the tangent angle of the upper surface of the support pads (3) meets the steel-wood static friction self-locking angle requirement. If not, proceed to A2; A4 simulates the lifting of the curved total section (1) to determine whether it meets the storage posture requirements of the transfer station. If not, enter A2; A5 determines the final transfer posture of the curved section (1), and determines the placement position of the supporting pads (3) and the detailed size of each supporting pad (3) according to the final transfer posture of the curved section (1); A6: according to the final transfer posture of the curved segment (1), the section of the segment support pier (4) is set out, the support height of each part of the curved segment (1) is determined, and a suitable segment support pier (4) is configured for the curved segment (1); A7 obtained the final transfer plan.

2. A large-scale curved section dual-car transport design method according to claim 1, characterized in that: In A2, when determining the preliminary transfer posture of the curved section (1), it is also necessary to consider the center of gravity of the curved section (1), the state of the curved support surface, the space for the flatbed truck (2) to enter the vehicle, and the support height requirement of the curved section (1) at the transfer station.

3. A large-scale curved section dual-car transport design method according to claim 2, characterized in that: In A4, after the curved section (1) is hoisted, the storage posture of the curved section (1) under the assembly station and the transfer station will be deflected. The storage posture requirement of the transfer station is to ensure that the storage posture of the curved section (1) under the transfer station and the assembly station is close.

4. A large-scale curved section dual-car transport design method according to claim 3, characterized in that: In A5, the size of the supporting pads (3) under the transport condition of the flatbed truck (2) is laid out according to the placement position of the supporting pads (3), the size of each supporting pad (3) is determined, and fine-tuning pads are configured at the same time.

5. A large-scale curved section double-car intermodal operation method, based on a large-scale curved section double-car intermodal design method as claimed in claim 4, characterized in that: The following steps are involved: B1: Place the total section support pier (4) to a suitable position; connect the two flatbed trucks (2) into a whole through a pin shaft to realize the merging of the trucks; B2 uses a gantry crane to lift the curved segment (1) to the transfer station and adjusts the height of each segment support pier (4); places each supporting pad (3) at a suitable position on the flatbed truck (2); B3 determines whether the height of each section support pier (4) satisfies the support height of each location of the curved section (1). If not, proceed to B2. If yes, place the curved section (1) on each section support pier (4) and proceed to B4. B4 The flatbed car (2) moves to the bottom of the curved main section (1), and adjusts the relative position of the flatbed car (2) and the curved main section (1); The B5 flatbed truck (2) is used for lifting, and during the lifting process, the gap between the supporting pads (3) and the curved section (1) is checked and adjusted; The B6 flatbed car (2) is fully raised, driving the curved segment (1) to separate from the segment support pier (4); B7 flatbed car (2) transfer curved section (1).

6. A large-scale curved section double-car combined transport operation method according to claim 5, characterized in that: In B5, when the flatbed car (2) is lifted to a load of 20%, the gap between the supporting pads (3) and the curved section (1) is checked.

7. A large-scale curved section double-car intermodal operation method according to claim 6, characterized in that: in, When a gap is found, the flatbed truck (2) is lowered and reset, and the staff places a fine-tuning pad at the found gap, and then the flatbed truck (2) is lifted again and the gap between the supporting pad (3) and the curved section (1) is checked again.

Images