Trestle tower body hoisting process

Abstract

The invention relates to a trestle tower body hoisting process, a trestle comprises a base, a tower body, a truss type telescopic bridge, a walkway platform, a cab, a hydraulic system and an electrical system.The trestle tower body hoisting process comprises the following steps that firstly, the trestle tower body is placed on a wharf, and a wind power operation and maintenance ship and a wind power installation platform needed by trestle tower body hoisting are prepared; a main crane is arranged at the stern of the wind power installation platform and provided with a main hook and an auxiliary hook. The trestle tower body is transferred to a main deck of a wind power installation platform in advance, a main hook and an auxiliary hook of a main crane are used for being matched to conduct turning-over action, finally, the trestle tower body in the vertical state is hung by the auxiliary hook to be horizontally hung, and the trestle tower body is transferred to a wind power operation and maintenance ship and installed on the wind power operation and maintenance ship. According to the hoisting process, the wind power installation platform is adopted for being matched to achieve hoisting of the trestle tower body, the hoisting speed of the trestle is increased, and therefore the operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of trestle hoisting, and in particular to a trestle tower body hoisting process. Background Art

[0002] Telescopic wave compensation trestle is widely installed on various support platforms such as floating production storage and offloading units (FPSO), wind power installation vessels, wind power operation and maintenance vessels, and wind power installation platforms. Among them, the trestle of a wind power operation and maintenance vessel refers to the structure used to connect the hull and the wind turbine tower, usually located at the stern or side of the ship. The design and function of the trestle is to facilitate the staff to board the wind turbine tower for maintenance and maintenance work.

[0003] The hoisting of the wind power operation and maintenance ship trestle refers to the process of safely hanging the trestle tower from land or other ships to the wind power operation and maintenance ship. The hoisting and installation of the trestle requires high precision. Due to the limitations of the hoisting equipment, the mainstream solution for the hoisting and installation of the trestle at home and abroad is to hoist it by crane.

[0004] The hoisting and installation of traditional piers are limited by the cranes and cannot adapt to all scenarios and conditions. Especially in complex water environments, the restrictions on hoisting operations may be more obvious. In addition, the above scheme has high requirements on the berthing position of the ship and the crane capacity, which is difficult to meet the construction conditions. For example, the lifting capacity, arm length and lifting height of the dock gantry crane are insufficient, which will lead to the failure to meet the requirements of the wind power operation and maintenance ship pier hoisting. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a trestle tower body hoisting process capable of improving the installation accuracy and efficiency of the trestle.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a trestle tower body hoisting process, the trestle includes a base, a tower body, a truss telescopic bridge, a walkway platform, a driver's cab, a hydraulic system and an electrical system, and its innovation lies in: the tower body hoisting process includes the following steps: S1: First, the trestle tower is placed on the dock, and the wind power operation and maintenance ship and wind power installation platform required for the hoisting of the trestle tower are prepared. The wind power operation and maintenance ship and the wind power installation platform are driven to the dock, and the wind power operation and maintenance ship is moved to the outer position of the dock. The distance between the wind power operation and maintenance ship and the wind power installation platform is adjusted, and the cable is brought. The bow of the wind power operation and maintenance ship faces the west, and the bow of the wind power installation platform faces the east. The stern of the wind power installation platform is provided with a main crane, which is equipped with a main hook and an auxiliary hook; S2: Transfer the trestle tower to the main deck of the wind turbine installation platform in advance, and ensure that the top of the trestle tower faces east, and use wooden blocks to protect the contact part between the trestle tower and the main deck of the wind turbine installation platform; Before hoisting, first check whether the hoisting points, wire ropes and shackles are defective, then put the wire ropes and shackles for hoisting on the trestle tower according to the process plan drawings, and weld two 35T A-type lifting ears under the main crane's hanging beam in advance, with the spacing between the two A-type lifting ears being 3040mm; S3: The trestle tower is in a flat state. At this time, the main hook and auxiliary hook of the main crane hook the wire ropes on both sides of the trestle tower respectively, and lift the trestle tower 200mm away from the main deck. Then stop the operation and conduct a comprehensive inspection manually. If there is no abnormality, continue the lifting operation; S4: Use the main and auxiliary hooks of the main crane to cooperate in turning over, the main hook remains in place, and the auxiliary hook pulls one end of the trestle tower to rise until the angle between the bottom of the trestle tower and the main deck of the wind power installation platform reaches 15°, then the auxiliary hook stops rising, and then the main and auxiliary hooks are lowered at the same time, so that the bottom of the trestle tower contacts the main deck, and the trestle tower touches the ground, and then the auxiliary hook continues to rise until the angle between the bottom of the trestle tower and the main deck reaches 5°, the main hook is released, and the auxiliary hook is kept, so that the trestle tower is turned over; S5: Finally, the auxiliary hook lifts the vertical trestle tower body horizontally, transfers the trestle tower body to the wind power operation and maintenance ship, and installs it on the wind power operation and maintenance ship.

[0007] Furthermore, in step S1, when adjusting the distance between the wind power operation and maintenance ship and the wind power installation platform, it is necessary to consider the influence of the pier tower and the main crane on the wind power installation platform on the stern of the ship, the interference lifting of the wind power operation and maintenance ship, and the length of the auxiliary hook arm of the main crane of the wind power installation platform. The stern of the wind power operation and maintenance ship is downstream, the stern of the wind power installation platform is upstream, and the distance between the ships is selected to be 14M.

[0008] Furthermore, the lifting capacity of the main hook is 1800T, and the lifting capacity of the auxiliary hook is 500T.

[0009] Further, the steel wire ropes on the trestle tower body respectively include a first steel wire rope matched with the main hook and a second steel wire rope matched with the auxiliary hook, wherein the first steel wire rope further includes an upper segment and a lower segment distributed up and down, wherein the upper segment is two steel wire ropes, the lower segment is two steel wire rope loops, the upper segment and the lower segment are connected by a joint, a first shackle is provided between the upper segment and the joint, a second shackle is provided between the joint and the lower segment, a third shackle is provided between the lower segment and the tower body, and a fourth shackle is provided between the second steel wire rope and the tower body; The diameter of the steel wire rope used in the upper section is 70mm, the length is 18M, and the SWL is 50T. The diameter of the steel wire rope used in the lower section is 66mm, the length is 3M, and the SWL is 50T. The diameter of the steel wire rope used in the second steel wire rope is 70mm, the length is 8M, and the SWL is 50T. The first shackles have two parts and can withstand a tensile force of 120T, the second shackles have two parts and can withstand a tensile force of 35T, the third shackles have two parts and can withstand a tensile force of 35T, and the fourth shackles have two parts and can withstand a tensile force of 85T.

[0010] The advantages of the present invention are: the hoisting process of the present invention adopts a wind power installation platform to cooperate in realizing the hoisting of the trestle tower body, which speeds up the hoisting of the trestle, thereby improving the working efficiency, reducing the demand for human resources and hoisting equipment, thereby reducing the working cost, and adopting this coordinated method makes the hoisting method more flexible and diverse, can adapt to different hoisting conditions, and can realize more accurate trestle positioning and hoisting operation, which helps to ensure the stability and accuracy of the trestle installation.

[0011] By welding two 35T A-type lifting eyes under the hanging beam and controlling the distance between the two A-type lifting eyes to 3040mm, the distance between the wire ropes is increased, which prevents the wire ropes from hitting the trestle tower when turning over, and plays a certain protective role on the trestle tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of hoisting the trestle tower body of the present invention.

[0013] Figure 2-Figure 5 It is a flow chart of turning over of the trestle in the present invention. DETAILED DESCRIPTION

[0014] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0015] The trestle comprises a base, a tower body 1, a truss-type telescopic bridge, a walkway platform, a driver's cab, a hydraulic system and an electrical system.

[0016] The trestle tower body hoisting process of the present invention is achieved by the following steps: S1: First, the processed pier tower body 1 is placed on the dock in advance. The weight of the pier tower body 1 is about 70T. Then, the wind power operation and maintenance ship and wind power installation platform required for hoisting the pier tower body 1 are prepared, and the wind power operation and maintenance ship and the wind power installation platform are driven to the dock, and the wind power operation and maintenance ship is moved to the outer position of the dock, and the distance between the wind power operation and maintenance ship and the wind power installation platform is adjusted, and the cable is carried out. The bow of the wind power operation and maintenance ship faces the west, and the bow of the wind power installation platform faces the east. A main crane is set at the stern of the wind power installation platform. The main crane is equipped with a main hook 3 and an auxiliary hook 4, wherein the lifting capacity of the main hook 3 is 1800T, and the lifting capacity of the auxiliary hook 4 is 500T.

[0017] When adjusting the distance between the wind power operation and maintenance ship and the wind power installation platform, it is necessary to consider the influence of the main cranes on the pier and the wind power installation platform at the stern of the ship, the interference lifting of the wind power operation and maintenance ship, and the length of the auxiliary hook arm of the main crane of the wind power installation platform. The stern of the wind power operation and maintenance ship is downstream, and the stern of the wind power installation platform is upstream. The distance between the ships is selected to be 14M.

[0018] S2: Transfer the trestle tower body 1 to the main deck 2 of the wind power installation platform in advance, and ensure that the top of the trestle tower body 1 faces east, and use wooden blocks to protect the contact part between the trestle tower body 1 and the main deck 2 of the wind power installation platform to avoid scratches and wear on the surface of the trestle tower body 1.

[0019] Before lifting, first check whether there are any defects in the lifting points, wire ropes and shackles, then put the wire ropes and shackles for lifting on the trestle tower body 1 according to the process plan drawings, and weld two 35T A-type lifting ears under the hanging beam of the main crane in advance. The spacing between the two A-type lifting ears is 3040mm, which increases the spacing between the wire ropes and prevents the wire ropes from hitting the trestle tower body when turning over, which plays a certain protective role on the trestle tower body.

[0020] The distribution of wire ropes and shackles on the trestle tower 1 is as follows: like Figure 1 , Figure 2 As shown, the steel wire ropes on the pier tower body 1 include a first steel wire rope matched with the main hook 3 and a second steel wire rope 8 matched with the auxiliary hook 4, wherein the first steel wire rope includes an upper segment 5 and a lower segment 6 distributed up and down, wherein the upper segment 5 is two steel wire ropes, and the lower segment 6 is two steel wire rope loops, the upper segment 5 and the lower segment 6 are connected by a joint 7, a first shackle 11 is arranged between the upper segment 5 and the joint 6, a second shackle 12 is arranged between the joint 6 and the lower segment 6, a third shackle 13 is arranged between the lower segment 6 and the pier tower body 1, and a fourth shackle 14 is arranged between the second steel wire rope 8 and the pier tower body 1.

[0021] The diameter of the steel wire rope used in the upper section 5 is 70mm, the length is 18M, and the SWL is 50T. The diameter of the steel wire rope used in the lower section 6 is 66mm, the length is 3M, and the SWL is 50T. The diameter of the steel wire rope of the second steel wire rope 8 is 70mm, the length is 8M, and the SWL is 50T.

[0022] The first shackles 11 have two and can withstand a tensile force of 120T, the second shackles 12 have two and can withstand a tensile force of 35T, the third shackles 13 have two and can withstand a tensile force of 35T, and the fourth shackles 14 have two and can withstand a tensile force of 85T.

[0023] S3: The trestle tower 1 is in a flat state on the main deck 2. At this time, the main hook 3 and the auxiliary hook 4 of the main crane hook the steel wire ropes on both sides of the trestle tower 1 respectively, and the trestle tower 1 is lifted up and away from the main deck 2. Figure 2 As shown, after the distance between the pier tower body 1 and the main deck 2 reaches 200mm, the operation is stopped and a comprehensive inspection is carried out manually. If no abnormality is found, the lifting operation is continued.

[0024] S4: Use the main hook 3 and the auxiliary hook 4 of the main crane to cooperate in turning over. The specific turning over process is: First, the main hook 3 remains in place, and the auxiliary hook 4 pulls one end of the trestle tower 1 to rise until the angle between the bottom of the trestle tower 1 and the main deck 2 of the wind turbine installation platform reaches 15°, and then the auxiliary hook 4 stops rising. Figure 3 As shown, the main hook 3 and the auxiliary hook 4 are lowered at the same time, so that the bottom of the trestle tower body 1 contacts the main deck 2, the trestle tower body 1 is grounded, and protective work is done. Then the main hook 3 continues to remain motionless, and the auxiliary hook 4 continues to rise, pulling one end of the trestle tower body 1 to perform an ascending operation, until the angle between the bottom of the trestle tower body 1 and the main deck reaches 5°, and the auxiliary hook 4 stops rising. Figure 4 As shown, the main hook 3 is then released, and the auxiliary hook 4 is kept on, so as to realize the turning over of the trestle tower body 1, as shown in FIG. Figure 5 shown.

[0025] S5: Finally, the auxiliary hook 4 hoists the trestle tower body 1 in the vertical state for horizontal hoisting, and transfers the trestle tower body 1 to the wind power operation and maintenance vessel, and installs it on the wind power operation and maintenance vessel.

[0026] When the above-mentioned lifting process is used to lift the pier tower body 1, another wind power installation platform is used to cooperate in the lifting of the pier tower body 1, which speeds up the lifting of the pier tower body 1, thereby improving work efficiency, reducing the demand for human resources and lifting equipment, and thus reducing operating costs. In addition, this coordinated approach makes the lifting method more flexible and diverse, able to adapt to different lifting conditions, and can achieve more accurate pier positioning and lifting operations, helping to ensure the stability and accuracy of the pier installation.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A process for hoisting a trestle tower, the trestle comprising a base, a tower, a truss telescopic bridge, a walkway platform, a driver's cab, a hydraulic system and an electrical system, characterized in that: The tower body hoisting process comprises the following steps: S1: First, the trestle tower is placed on the dock, and the wind power operation and maintenance ship and wind power installation platform required for the hoisting of the trestle tower are prepared. The wind power operation and maintenance ship and the wind power installation platform are driven to the dock, and the wind power operation and maintenance ship is moved to the outer position of the dock. The distance between the wind power operation and maintenance ship and the wind power installation platform is adjusted, and the cable is brought. The bow of the wind power operation and maintenance ship faces the west, and the bow of the wind power installation platform faces the east. The stern of the wind power installation platform is provided with a main crane, which is equipped with a main hook and an auxiliary hook; S2: Transfer the trestle tower to the main deck of the wind turbine installation platform in advance, and ensure that the top of the trestle tower faces east, and use wooden blocks to protect the contact part between the trestle tower and the main deck of the wind turbine installation platform; Before hoisting, first check whether the hoisting points, wire ropes and shackles are defective, then put the wire ropes and shackles for hoisting on the trestle tower according to the process plan drawings, and weld two 35T A-type lifting ears under the main crane's hanging beam in advance, with the spacing between the two A-type lifting ears being 3040mm; S3: The trestle tower is in a flat state. At this time, the main hook and auxiliary hook of the main crane hook the wire ropes on both sides of the trestle tower respectively, and lift the trestle tower 200mm away from the main deck. Then stop the operation and conduct a comprehensive inspection manually. If there is no abnormality, continue the lifting operation; S4: Use the main and auxiliary hooks of the main crane to cooperate in turning over, the main hook remains in place, and the auxiliary hook pulls one end of the trestle tower to rise until the angle between the bottom of the trestle tower and the main deck of the wind power installation platform reaches 15°, then the auxiliary hook stops rising, and then the main and auxiliary hooks are lowered at the same time, so that the bottom of the trestle tower contacts the main deck, and the trestle tower touches the ground, and then the auxiliary hook continues to rise until the angle between the bottom of the trestle tower and the main deck reaches 5°, the main hook is released, and the auxiliary hook is kept, so that the trestle tower is turned over; S5: Finally, the auxiliary hook lifts the vertical trestle tower body horizontally, transfers the trestle tower body to the wind power operation and maintenance ship, and installs it on the wind power operation and maintenance ship.

2. The trestle tower body hoisting process according to claim 1 is characterized in that: In step S1, when adjusting the distance between the wind power operation and maintenance ship and the wind power installation platform, it is necessary to consider the influence of the main cranes on the pier and the wind power installation platform at the stern of the ship, the interference lifting of the wind power operation and maintenance ship, and the length of the auxiliary hook arm of the main crane of the wind power installation platform. The stern of the wind power operation and maintenance ship is downstream, the stern of the wind power installation platform is upstream, and the ship spacing is selected as 14M.

3. The trestle tower body hoisting process according to claim 1 is characterized in that: The lifting capacity of the main hook is 1800T, and the lifting capacity of the auxiliary hook is 500T.

4. The process for hoisting the trestle tower according to claim 1 is characterized in that: The steel wire ropes on the trestle tower body respectively include a first steel wire rope matched with a main hook and a second steel wire rope matched with an auxiliary hook, wherein the first steel wire rope further includes an upper segment and a lower segment distributed up and down, wherein the upper segment is two steel wire ropes, the lower segment is two steel wire rope loops, the upper segment and the lower segment are connected by a joint, a first shackle is provided between the upper segment and the joint, a second shackle is provided between the joint and the lower segment, a third shackle is provided between the lower segment and the tower body, and a fourth shackle is provided between the second steel wire rope and the tower body; The diameter of the steel wire rope used in the upper section is 70mm, the length is 18M, and the SWL is 50T. The diameter of the steel wire rope used in the lower section is 66mm, the length is 3M, and the SWL is 50T. The diameter of the steel wire rope used in the second steel wire rope is 70mm, the length is 8M, and the SWL is 50T. The first shackles have two parts and can withstand a tensile force of 120T, the second shackles have two parts and can withstand a tensile force of 35T, the third shackles have two parts and can withstand a tensile force of 35T, and the fourth shackles have two parts and can withstand a tensile force of 85T.

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