Crawler crane superlift balancing weight tray and application method thereof

Abstract

The invention provides a crawler crane superlift balancing weight tray which comprises a rectangular frame main body structure formed by welding H-shaped steel, and the main body structure is correspondingly designed according to the structural form and the size of the two end sides of a crawler crane balancing weight hopper and the size of a balancing weight. An open slot position corresponding to a limiting block of a super-lifting counterweight hopper of the crawler crane is formed below the main body structure, and a limiting block which is used for clamping and stacking the counterweight block and is the same as the upper end surface of the counterweight block is correspondingly mounted above the main body structure. With the adoption of the tool and the method, under the condition that the working principle and the working steps of the crawler crane cannot be changed and must be guaranteed, the novel tool is designed and applied, and the sling is hung in advance, so that tiny defects and deficiencies of crawler crane equipment are overcome, the labor intensity and the working risk of field operating personnel are reduced, and the working efficiency is improved. Operation procedures and procedures are simplified, the overall ship loading efficiency of the steel pipe piles is improved, and it is guaranteed that the steel pipe piles are rapidly and efficiently loaded and delivered to owners according to node requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore wind power steel pipe pile construction, and in particular relates to a crawler crane super-lifting counterweight pallet and an application method thereof. Background Art

[0002] When crawler cranes are required to lift counterweights to complete hoisting operations, according to their working principles, the operation steps are much more complicated than those of fixed cranes in factories, but each operation step is indispensable and must be carried out and completed in an orderly manner. The problems and defects of the prior art are mainly concentrated in the above step ⑧. Since a single 10t counterweight block is wrapped in an external steel plate and filled with steel sand instead of a solid steel structure, multiple blocks cannot be directly stacked and hoisted, and only 2 blocks / time (i.e. 20t / time) are allowed to be hoisted at most. When over-lifting the counterweight, the maximum over-lifting counterweight required for loading and unloading the steel pipe piles is 360t. In addition to the 120t basic over-lifting counterweight (100t counterweight block and 20t counterweight bucket weight), 12 counterweight blocks need to be placed on the left and right sides of the counterweight bucket. Therefore, when lifting the counterweight blocks on both ends in step ⑧, it takes up to 12 times, each time taking about 8 minutes, and the total time is close to 100 minutes at most. In addition, when more than ten counterweight blocks are stacked, it is inconvenient for personnel to get on and off, and there are certain safety risks in working at heights. Summary of the invention

[0003] In order to solve the technical problems in the prior art, the present invention provides a crawler crane super-lift counterweight pallet, comprising a rectangular frame main structure welded by H-shaped steel, the main structure being designed accordingly with reference to the structural form and size at both end sides of the crawler crane counterweight bucket, as well as the size of the counterweight; an open slot corresponding to the limit block of the crawler crane super-lift counterweight bucket is provided below the main structure, and a limit block corresponding to the upper end surface of the counterweight, which is used for stacking the counterweight, is installed above the main structure.

[0004] Furthermore, the main structure includes two first components and three second components.

[0005] Two first components are arranged in parallel to form two long sides of the main structure;

[0006] The three second components are vertically arranged between the two first components, wherein the second components located on both sides constitute two short sides of the main structure.

[0007] Furthermore, the main structure also includes two third components.

[0008] A third component is vertically arranged between two adjacent second components.

[0009] Furthermore, the two third components are located on the center line of the main structure.

[0010] Furthermore, the opening slots on the main structure are only opened on the H-shaped steel bottom plate.

[0011] Furthermore, a hanging weight is installed at each of the four corners of the main structure.

[0012] Furthermore, the main structure is designed to have a certain number of reinforcing ribs installed at local locations and open slots of the H-shaped steel.

[0013] The application method of the above crawler crane super-lifting counterweight pallet comprises:

[0014] The two counterweight pallets are hoisted and placed above the two ends of the crawler crane counterweight bucket in advance, and then the counterweights are hoisted and stacked layer by layer by a truck crane until the rated weight of the superlift counterweight is reached;

[0015] After the steel pipe piles are loaded onto the ship and the hook is released, the connection device between the crawler crane and the super-lift counterweight bucket is removed, the boom is turned 180° to the top of the counterweight bucket, and the counterweight pallet with the heaviest weight of 240t on both ends of the crawler crane counterweight bucket is lifted with two lifts.

[0016] Furthermore, a total of four superlift counterweight pallets are manufactured, and when the next steel pipe pile is loaded onto the ship and hoisted, the two steps described in claim 8 are repeated to complete the loading and lifting of the superlift counterweight in sequence.

[0017] Furthermore, in the second step of the steps described in claim 8, two sets of four counterweight pallets are manufactured for cyclic and staggered use.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By adopting the tooling and method of the present invention, when the working principle and operating steps of the crawler crane cannot be changed and must be guaranteed, the subtle defects and shortcomings of the crawler crane equipment itself can be solved by designing and applying new tooling and a method of pre-hanging the sling, thereby reducing the labor intensity and operating risks of on-site operators, simplifying the operating procedures and processes, and improving the overall loading efficiency of the steel pipe piles, ensuring that the steel pipe piles are quickly and efficiently loaded and delivered to the owner according to the node requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of steel pipe pile hoisting in the prior art I;

[0021] Figure 2 It is a schematic diagram II of steel pipe pile hoisting in the prior art;

[0022] Figure 3 It is a schematic diagram of the structure of the present invention;

[0023] Figure 4 yes Figure 3Schematic diagram of AA in the middle;

[0024] Figure 5 yes Figure 3 Schematic diagram of the middle BB;

[0025] Figure 6 yes Figure 3 Schematic diagram of CC;

[0026] Figure 7 It is a schematic diagram of the opening slot of the H-beam of the present invention.

[0027] Serial numbers and names of the accompanying drawings: P1 / P1-1, first component, P2 / P2-1 / P2-2, second component, P3, third component, P4 / P5 / P5-1 / P6, reinforcement ribs, P7, limit blocks, P8 / P9 / P9-1, reinforcement plates, P10, hanging brackets. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Reference Figure 1 and Figure 2 , the existing technology of steel pipe pile hoisting includes:

[0030] After the steel pipe piles are built, they are transported to the wharf by modular vehicles, and then hoisted onto a barge by a crane and delivered to the owner. Since the weight of a single steel pipe pile exceeds the hoisting range of the 200t crane at the wharf, a rented 1350t crawler crane was selected after comprehensive comparison to hoist the steel pipe piles onto a barge. When the crawler crane is performing the hoisting operation, according to the existing technology and the working principle of the crawler crane, the specific operation steps are: ① Lift the super-lifting counterweight bucket at the tail of the crawler crane to the side of the wharf (the basic super-lifting counterweight block in the middle of the counterweight bucket is pre-placed) → ② The crawler crane hangs the lifting beam and lifting belt, turns to the lifting position, and then connects the super-lifting connecting rod to lock the super-lifting counterweight bucket → ③ The steel pipe pile is transported to the lifting position in front of the crawler crane → ④ The lifting belt ties the steel pipe pile and the hook lifts it → ⑤ The crawler crane lifts the steel pipe pile and Turn 180° in situ until the pipe pile is aligned with the barge (the pipe pile is parallel to the loading position) →⑥ Use a truck crane to lift the counterweight blocks and place them on both ends of the super-lift counterweight bucket until the rated super-lift counterweight value is reached →⑦ The crawler crane grabs the rod and moves forward to lift the steel pipe pile to the predetermined loading position and then release the hook to complete the lifting of a single steel pipe pile onto the barge →⑧ Use a truck crane to lift the super-lift counterweight blocks on both ends of the counterweight bucket →⑨ Repeat the above steps in sequence to complete the lifting and barge operations of the remaining loading steel pipe piles.

[0031] Reference Figure 3-6The present application proposes a crawler crane super-lifting counterweight pallet, which is composed of parts P1 to P10 and is designed accordingly with reference to the structural form and size of the two end sides of the crawler crane counterweight bucket and the size of the counterweight block. The main load-bearing structure adopts H-shaped steel (P1 / P1-1, P2 / P2-1 / P2-2, P3) with a specification of W12*96 in the factory inventory. An open slot corresponding to the limit block of the crawler crane super-lifting counterweight bucket is opened at the bottom of the main structure. A limit block (P7, 3 pieces in total) that is the same as the upper end surface of the counterweight block and is used for stacking the counterweight block is installed above the main structure. A 35t lifting code (P10) is installed at each of the four corners of the main structure. At the same time, a certain number of reinforcing ribs are designed and installed at the local position of the H-shaped steel and the open slot.

[0032] It should be noted that, refer to Figure 7 , taking the first component as an example, the opening slot on the main structure is only opened on the H-shaped steel bottom plate.

[0033] The application method of the present application comprises the following steps:

[0034] After the counterweight pallet is manufactured, when carrying out step ⑥ of the above-mentioned “hoisting of steel pipe piles in the prior art”, the two counterweight pallets are hoisted and placed above the two ends of the crawler crane counterweight bucket, and then the counterweights are hoisted and stacked layer by layer by a truck crane until the rated weight of the super-lifting counterweight is reached;

[0035] After the steel pipe piles are loaded on the ship and the hook is released, the connection device between the crawler crane and the super-lift counterweight bucket is removed, the boom is turned 180° to the top of the counterweight bucket, and the counterweight pallet with the pre-hung sling hook is used. The counterweight blocks with the heaviest weight of 240t on both ends of the crawler crane counterweight bucket can be lifted with two lifts, which greatly improves the efficiency of lifting the counterweight blocks.

[0036] A total of 4 super-lifting counterweight pallets are made. When the next steel pipe pile is loaded onto the ship, the above steps 2) and 3) are repeated to complete the loading and lifting of the super-lifting counterweight in sequence, thereby speeding up the overall work efficiency of the steel pipe pile loading and loading.

[0037] In addition: in step 3), after the crawler crane is used to lift the super-lift counterweight off, when loading the super-lift counterweight of the next steel pipe pile, if the crane has sufficient lifting capacity, the super-lift counterweight loading can be completed with two lifts. However, during the stage of loading the super-lift counterweight block, the crawler crane has hooked the steel pipe pile and the main hook is facing the loading position. There is no truck crane with sufficient lifting capacity in the factory (the maximum required lifting capacity is 120t), and the cost of renting a large-sized truck crane is also very high. Therefore, 2 sets of 4 counterweight pallets are made for cyclic and staggered use. Each time the super-lift counterweight loading operation is performed, the 80t truck crane in the factory is used to load and lift 2 counterweight blocks (20t) per lift.

[0038] In summary, the above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. All equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification are within the scope covered by the patent of the present invention.

Claims

1. A crawler crane super-lifting counterweight pallet, characterized by: It comprises a rectangular frame main structure welded by H-shaped steel, and the main structure is designed correspondingly with reference to the structural form and size at both ends of the crawler crane counterweight bucket, as well as the size of the counterweight block; an opening slot corresponding to the limit block of the crawler crane super-lift counterweight bucket is provided at the bottom of the main structure, and a limit block which is the same as the upper end surface of the counterweight block and is used for stacking the counterweight blocks is installed at the top of the main structure.

2. The pallet according to claim 1, characterized in that: The main structure includes two first components and three second components. Two first components are arranged in parallel to form two long sides of the main structure; The three second components are vertically arranged between the two first components, wherein the second components located on both sides constitute two short sides of the main structure.

3. The pallet according to claim 2, characterized in that: The main structure also includes two third components, A third component is vertically arranged between two adjacent second components.

4. The pallet according to claim 3, characterized in that: The two third components are located on the center line of the main structure.

5. The pallet according to claim 1, characterized in that: The opening slots on the main structure are only opened on the H-shaped steel bottom plate.

6. The pallet according to claim 1, characterized in that: A hanging code is installed at each of the four corners of the main structure.

7. The pallet according to claim 1, characterized in that: The main structure is designed to install a certain number of reinforcing rib plates at local positions and open slots of the H-shaped steel.

8. The method for applying the crawler crane super-lifting counterweight pallet according to any one of claims 1 to 7, characterized in that: The two counterweight pallets are hoisted and placed above the two ends of the crawler crane counterweight bucket in advance, and then the counterweights are hoisted and stacked layer by layer by a truck crane until the rated weight of the superlift counterweight is reached; After the steel pipe piles are loaded onto the ship and the hook is released, the connection device between the crawler crane and the super-lift counterweight bucket is removed, the boom is turned 180° to the top of the counterweight bucket, and the counterweight pallet with the heaviest weight of 240t on both ends of the crawler crane counterweight bucket is lifted with two lifts.

9. The method according to claim 8, characterized in that: A total of four superlift counterweight pallets are manufactured. When the next steel pipe pile is loaded onto a ship and hoisted, the two steps described in claim 8 are repeated to complete the loading and lifting of the superlift counterweight in sequence.

10. The method according to claim 8, characterized in that: In the second step of the steps described in claim 8, two sets of four counterweight pallets are made for cyclic and staggered use.

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