Multi-point hoisting construction method for water-cooled wall

Abstract

A plurality of hoisting point positions are arranged on the water cooling wall, a plurality of pulleys are used for forming a pulley block to be connected with a water cooling wall hoisting hook, hoisting tools such as pulley slings and steel wire ropes and large hoisting machines are reasonably selected, and a three-machine multi-point hoisting method is adopted. Force balance is achieved through the design of the pulley block, when the main crane generates force to lift the water cooling wall, the auxiliary crane is matched with the main crane to lift the water cooling wall, the tail sliding crane and the auxiliary crane work cooperatively to enable the water cooling wall to be always kept on the same straight line, and the pulley block can disperse force exerted on the pulley to each lifting hook in real time. The water-cooled wall is balanced in stress and free of bending deformation in the hoisting process, the main hoist is completely stressed, when the water-cooled wall is perpendicular, the auxiliary hoist unhooks by sliding the tail, then the water-cooled wall is hoisted in place, the hoisting process is safe and reliable, the equipment installation progress is accelerated, and the water-cooled wall installation quality is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of petrochemical and energy industry equipment hoisting, and specifically, is a water-cooled wall multi-point hoisting construction method. Background Art

[0002] In the low-rank coal hydrogen production project, the smooth operation of the boiler is the guarantee for the stable operation of the steam system of the whole plant and the start-up of the process equipment. The water-cooled wall is the main radiation evaporation heating surface of the boiler, and its installation quality is crucial to the long-term stable operation of the boiler.

[0003] Taking the project of Gansu Nenghua Jinchang Energy Chemical Development Co., Ltd. for efficient utilization of low-rank coal for hydrogen production and 500,000 tons / year of high-concentration urea-based compound fertilizer as an example, the furnace water-cooled wall of the circulating fluidized bed boiler of this project adopts a full membrane wall structure, and the water-cooled fireplace tube specification is Φ51×5; the furnace tube forms a rigid hanging structure of the entire water-cooled wall through a rigid beam, and the water-cooled wall is suspended on the top large plate beam of the steel frame through a water-cooled wall hanging device. The "hoisting of the water-cooled wall in front of the furnace" of this project is the most difficult to construct. The net weight of the water-cooled wall is 42.57t, the length is 33.4m, the width is 10.21m, and the maximum hoisting height is 68m. If the hoisting process is not handled properly, the water-cooled wall is very easy to bend and deform and carry the rod.

[0004] The conventional hoisting method is to weld the water-cooled wall on the ground, then weld rigid supports on both sides of the water-cooled wall from top to bottom, and lift with two machines to prevent the water-cooled wall from bending and deformation during the hoisting process. However, there are the following problems: (1) Conventional water-cooled wall hoisting requires the addition of rigid supports, which not only increases the use of profiles, steel plates and other materials, but also requires the rigid supports to be welded and fixed on the water-cooled wall, which increases a lot of welding work and increases the construction cost.

[0005] (2) Inconvenient disassembly. The additional supporting profiles and plates are temporary materials and need to be disassembled and restored after the hoisting is completed. They are not easy to disassemble after welding and will cause damage to the water-cooled wall. The workload of secondary operations increases, the number of operations at heights increases, the safety hazards are greater, and the hoisting efficiency is low.

[0006] Therefore, it is particularly important to adopt more effective technical measures and construction methods to improve the efficiency of water-cooled wall hoisting, reduce the cost of water-cooled wall hoisting, and ensure the construction quality and overall appearance of the water-cooled wall. Summary of the invention

[0007] The purpose of the present invention is to provide a water-cooled wall multi-point hoisting construction method, which ensures the hoisting efficiency and installation quality of the water-cooled wall and reduces the construction safety risk.

[0008] To achieve the above object, the technical solution adopted by the present invention is: A water-cooled wall multi-point hoisting construction method, comprising: Step 1: After calculation, determine and select a three-machine lifting and multi-point lifting method, wherein the three machines include a main lifting crane, an auxiliary lifting crane and a tail crane; Step 2: According to the center of gravity of the water-cooled wall to be lifted, the positions of the lifting hooks of the auxiliary lifting crane and the tail crane are determined. The lifting hook positions of the auxiliary lifting crane are symmetrically selected on both sides of the center of gravity of the water-cooled wall, and the lifting hook position of the tail crane is at the tail of the water-cooled wall; a steel wire rope is connected between the pair of lifting hooks, a pulley is installed on the steel wire rope, and the lifting slings of the auxiliary lifting crane and the tail crane are directly or indirectly connected to the pulley respectively; the main lifting lug of the main lifting crane is set at the top of the water-cooled wall, and the lifting sling of the main lifting crane is connected to the main lifting lug; Step 3: Start the crane, the main crane lifts the water-cooled wall, the auxiliary crane cooperates with the main crane to lift the water-cooled wall, the tail crane and the auxiliary crane work together to keep the water-cooled wall in a straight line, the water-cooled wall is lifted off the ground for observation, and after confirming that there is no abnormality, proceed to the next procedure; Step 4: The main crane continues to exert force to retract the rope. The tail crane and auxiliary crane are connected to the water-cooled wall through pulleys. They cooperate with the main crane to keep the upper, middle and lower parts of the water-cooled wall straight at all times. The water-cooled wall is slowly tilted from 0° to 90° until the water-cooled wall is fully stressed by the main crane. Step 5: The auxiliary crane and the tail crane are unhooked at the same time, the main crane is fully stressed, the water-cooled wall droops naturally, and the boom of the main crane slowly rotates to lift the water-cooled wall to the predetermined position; Step six: Check the installation position. After confirming that it is correct, the main crane drops the hook and steadily lifts the water-cooled wall into the boiler steel structure frame.

[0009] As a preferred embodiment of the present invention, in step one, three cranes are positioned between the water-cooled wall assembly platform and the boiler island, the main crane is aligned with the top of the water-cooled wall, the auxiliary crane is aligned with the center of gravity of the water-cooled wall, and the tail crane is located at the rear side of the tail of the water-cooled wall.

[0010] As a preferred embodiment of the present invention, in step 2, the lifting hooks of the auxiliary crane are selected on the rigid beam connecting plates on both sides of the center of gravity of the water-cooled wall.

[0011] As a preferred embodiment of the present invention, in step 2, a total of 8 lifting hooks of the auxiliary crane are provided, and the above 8 lifting hooks are divided into two groups, 4 lifting hooks in one group, and the two groups of lifting hooks are arranged on both sides of the water-cooled wall; in each group of lifting hooks, the squares along the height of the water-cooled wall are the first hook, the second hook, the third hook and the fourth hook in sequence, a steel wire rope is connected between the first hook and the third hook and a first pulley is installed on the steel wire rope, a steel wire rope is connected between the second hook and the fourth hook and a second pulley is installed on the steel wire rope, a third pulley is connected between the pulley lifting holes of the first pulley and the second pulley, and the third pulley is connected to the lifting sling of the auxiliary crane.

[0012] As a preferred embodiment of the present invention, in step 2, the lifting hook of the tail crane is arranged on the rigid beam connecting plate at the tail of the water-cooled wall.

[0013] As a preferred embodiment of the present invention, in step 2, a total of 4 lifting hooks of the tail crane are provided, two lifting hooks form a group, and the two groups of lifting hooks are arranged on both sides of the water-cooled wall; a steel wire rope is connected between the two lifting hooks in each group and a pulley is installed on the steel wire rope.

[0014] As a preferred embodiment of the present invention, in step 2, the main hoist crane is connected to the hanging hole of the water-cooled wall top hanging device through a wire rope and a shackle.

[0015] As a preferred embodiment of the present invention, in step three, the water-cooled wall is lifted 300 mm off the ground for observation.

[0016] Compared with the prior art, the present invention has the following technical effects: (1) The present invention utilizes multiple pulleys to form a pulley block to connect multiple lifting hooks of the water-cooled wall for lifting operations, and rationally selects the main, auxiliary, and tail-walking three-machine lifting method, eliminating the need to add rigid support to the water-cooled wall, greatly reducing the use of steel plates, profiles and other means of materials, while also reducing the workload of welding, thereby realizing multi-point lifting construction of the water-cooled wall and ensuring the construction efficiency and quality of the water-cooled wall installation.

[0017] (2) Compared with the existing method of adding rigid support for hoisting, the present invention uses the opening of the water-cooled wall rigid beam connecting plate as a lifting hook. After the hoisting is completed, it is only necessary to remove the shackle at the hook position. The disassembly process will not cause any damage to the water-cooled wall, avoiding secondary operations after installation. It reduces high-altitude operations, is safe and reliable, speeds up the installation of the water-cooled wall, and reduces the construction period by 60%.

[0018] (3) After the lifting is completed, the rope and pulley can be disassembled. The structure is simple, easy to store, and can be reused. The construction method is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are used to provide further explanation of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 This is a schematic diagram of the water-cooled wall rigging of the present invention; Figure 2 It is a layout diagram of the lifting hooks of the water-cooled wall of the present invention; Figure 3 It is a schematic diagram of the connection details between the pulley block and the water-cooled wall of the present invention; Figure 4 It is a detailed schematic diagram of the main suspension lug of the present invention; Figure 5 It is a schematic diagram of the positions of three cranes of the present invention; Figure 6 It is a schematic diagram of the three-machine lifting and hoisting of the water-cooled wall of the present invention; Figure 7 It is a schematic diagram of the main hoist crane of the present invention hoisting the water-cooled wall into place.

[0021] In the figure, 1-rigid beam connecting plate, 2-lock, 3-shackle, 4-water-cooled wall, 5-wire rope, 6-pulley, 7-rigid beam, 8-lifting hook, 9-main lifting lug, 10-water-cooled wall hanging device, 11-rib plate, 12-boiler steel frame, 13-main lifting crane, 14-auxiliary lifting crane, 15-tail crane, 16-water-cooled wall assembly platform, 17-boiler island, 18-main lifting station, 19-auxiliary lifting station, 20-tail crane station, 21-pulley lifting hole. DETAILED DESCRIPTION

[0022] In order to make those skilled in the art better understand the present invention, the present invention is further clearly and completely described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the features in the embodiments and examples of this application can be combined with each other.

[0023] A typical embodiment of the present invention provides a multi-point hoisting construction method for a water-cooled wall, which uses a plurality of pulleys to form a pulley block to connect a plurality of lifting hooks of the water-cooled wall for hoisting operations, and reasonably selects a main, auxiliary, and tail-walking three-machine lifting method, thereby eliminating the need to add rigid support to the water-cooled wall, greatly reducing the use of steel plates, profiles, and other means, and also reducing the welding workload, thereby realizing the multi-point hoisting construction of the water-cooled wall and ensuring the construction efficiency and construction quality of the water-cooled wall installation. The method comprises: Step 1: After calculation, determine to select a three-machine lifting and multi-point lifting method, wherein the three machines include a main lifting crane 13, an auxiliary lifting crane 14 and a tail crane 15.

[0024] Specifically, CAD drawing software is used to hoist the water-cooled wall 4 into place within the boiler steel structure frame 12 for layout, and the crane arm length and turning radius are calculated. A suitable main crane 13 is selected according to the hoisting weight of the water-cooled wall 4; the crane station position is determined according to the actual site, and after the crane force calculation, a suitable auxiliary crane 14 and tail crane 15 are selected to ensure that the crane load rate meets the construction safety requirements.

[0025] Step 2: According to the gravity center of the water-cooled wall 4 to be lifted, the positions of the lifting hooks 8 of the auxiliary lifting crane 14 and the tail crane 15 are determined. The positions of the lifting hooks 8 of the auxiliary lifting crane 14 are symmetrically selected on both sides of the gravity center of the water-cooled wall 4, and the lifting hooks 8 of the tail crane 15 are located at the tail of the water-cooled wall 4. The above pair of lifting hooks 8 are connected with a steel wire rope 5, on which a pulley 6 is installed. The lifting slings of the auxiliary lifting crane 14 and the tail crane 15 are directly or indirectly connected to the pulley 6. The pulley design realizes the balance of force, and can disperse the force applied to the pulley to each lifting hook 8 in real time, so that the force of the water-cooled wall 4 is balanced during the lifting process without bending and deformation.

[0026] The main lifting lug 9 of the main lifting crane 13 is arranged on the top of the water-cooled wall 4 , and the lifting rigging of the main lifting crane 13 is connected to the main lifting lug 9 .

[0027] Step three, start the crane, the main crane 13 uses force to lift the water-cooled wall 4, the auxiliary crane 14 cooperates with the main crane 13 to lift the water-cooled wall 4, the tail crane 15 and the auxiliary crane 14 work together to keep the water-cooled wall 4 in a straight line at all times, and the water-cooled wall 4 is lifted off the ground for observation, and after confirming that there is no abnormality, proceed to the next procedure.

[0028] Step 4: the main hoist crane 13 continues to exert force to reel in the rope, the tail crane 15 and the auxiliary hoist crane 14 are connected to the water-cooled wall 4 through the pulley 6, and cooperate with the main hoist crane 13 to keep the upper, middle and lower parts of the water-cooled wall 4 always straight, and the water-cooled wall 4 is slowly tilted from 0° to 90° until the water-cooled wall 4 is fully supported by the main hoist crane 13.

[0029] Step 5: The auxiliary crane 14 and the tail crane 15 are unhooked at the same time, the main crane 13 is fully stressed, the water-cooled wall 4 droops naturally, and the boom of the main crane 13 slowly rotates to lift the water-cooled wall 4 to the predetermined position.

[0030] Step six, check the installation position, after confirming that it is correct, the main crane 13 drops the hook and stably lifts the water-cooled wall 4 into the boiler steel structure frame 12.

[0031] The hoisting of the water-cooled wall 4 described in this step is not the final placement. This pre-positioning requires that the water-cooled wall 4 be temporarily fixed to the boiler steel frame 12 by the water-cooled wall hanging device 10 before the main hoist crane 13 is unhooked. The hook can be unhooked only after the hanging is completed.

[0032] According to this embodiment, multiple lifting points are set on the water-cooled wall 4 by calculation, and multiple pulleys 6 are used to form a pulley block connected to the water-cooled wall lifting hook 8. Lifting tools such as pulleys 6 and wire ropes 5 and large-scale lifting machinery are reasonably selected, and a three-machine multi-point lifting method is adopted. The design of the pulley block achieves force balance. When the main crane 13 exerts force to lift the water-cooled wall 4, the auxiliary crane 14 cooperates with the main crane 13 to lift the water-cooled wall 4. The tail crane 15 and the auxiliary crane 14 work together to keep the water-cooled wall 4 in a straight line. The pulley block will disperse the force applied to the pulley 6 to each lifting hook 8 in real time to ensure that the water-cooled wall 4 is balanced in force during the lifting process without bending and deformation. When the main crane is fully stressed and the water-cooled wall is vertical, the auxiliary crane and the tail crane are unhooked, and then the water-cooled wall 4 is hoisted in place. The hoisting process is safe and reliable, which speeds up the progress of equipment installation and ensures the quality of water-cooled wall installation.

[0033] The technical solution claimed for protection of the present invention is clearly and completely described below in conjunction with a relatively specific embodiment.

[0034] The furnace water-cooled wall of the circulating fluidized bed boiler of a company's low-rank coal efficient utilization hydrogen production and 500,000 tons / year high-concentration urea-based compound fertilizer project adopts a full membrane wall structure, and the water-cooled wall tube is Φ51×5; the rigid beam forms a rigid hanging structure of the entire water-cooled wall, and the water-cooled wall is suspended on the top plate beam of the steel frame through the water-cooled wall hanging device. The "furnace front water-cooled wall hoisting" of this project is the most difficult to construct, with a net weight of 42.57t, a length of 33.4m, a width of 10.21m, and a maximum hoisting height of 68m.

[0035] The installation process flow of the water-cooled wall hoisting in this embodiment is as follows: determine the position of the crane - determine the type of hoisting machinery through calculation - select the wire rope - calculate the center of gravity of the water-cooled wall, determine the position distribution of the lifting hook - calculate the force on the crane - check the toughness of the water-cooled wall by the pulley block - calculate the ground pressure - check the allowable load and strength of the lifting lug - put the crane in place - open the lifting hook of the water-cooled wall, install the shackle - connect the crane and the water-cooled wall through the pulley block - the main crane lifts the water-cooled wall, and the auxiliary crane and the tail crane cooperate - lift slowly until the main crane is fully stressed - the auxiliary crane and the tail crane unhook - the main crane rotates and hoists to the predetermined position - the water-cooled wall is fixed on the hanging device - the main crane unhooks - the crane is closed to complete the hoisting.

[0036] refer to Figure 1 and Figure 5The water-cooled wall is hoisted by three cranes at multiple points. The three cranes are positioned between the water-cooled wall assembly platform 16 and the boiler island 17. The main crane position 18 is aligned with the top of the water-cooled wall, the auxiliary crane position 19 is aligned with the center of gravity of the water-cooled wall, and the tail crane 15 is located at the rear side of the tail of the water-cooled wall.

[0037] refer to Figure 2 , the lifting hook of the water-cooled wall is opened and the shackle is installed. The position of the lifting hook 8 is determined according to the center of gravity of the water-cooled wall to be lifted. The lifting sling of the auxiliary lifting crane 14 is connected to 8 lifting hooks 8, and a pulley block is formed using six pulleys 6. The lifting sling of the tail crane 15 is connected to 4 lifting hooks 8, and a pulley block is formed using 2 pulleys. The main lifting crane is connected to the main lifting lug 9 at the top of the water-cooled wall. Reference Figure 3 The position of the lifting hook 8 of the auxiliary crane is symmetrically selected on both sides of the center of gravity of the water-cooled wall, and is selected on the rigid beam connecting plate 1. The rigid beam connecting plate 1 has a hole through which the wire rope shackle 33 is inserted.

[0038] refer to Figure 2 , the 8 lifting hooks of the auxiliary crane are divided into two groups, 4 lifting hooks 8 form one group, and the two groups of lifting hooks 8 are arranged on both sides of the water-cooled wall 4. In each group of lifting hooks 8, the squares along the height of the water-cooled wall 4 are the first hook, the second hook, the third hook and the fourth hook in sequence, and the connection method is staggered connection, that is, the first hook and the third hook are connected with the first pulley installed on the wire rope 5, the second hook and the fourth hook are connected with the wire rope 5 and the second pulley is installed on the wire rope 5, the third pulley is connected between the pulley hanging holes 21 of the first pulley and the second pulley, and the third pulley is connected to the lifting rigging of the auxiliary crane 14.

[0039] In this embodiment, the connection sequence between the auxiliary crane 14 and the water-cooled wall 4 is: the auxiliary crane hook is connected to the wire rope, the wire rope is respectively connected to the pulley hanging holes 21 of the two pulleys 6 located on the upper layer, and each upper pulley 6 is respectively connected to the pulley hanging holes 21 of the two lower pulleys 6 through the wire rope 5, and the four pulleys of the lower layer are installed on the wire rope 5, and the wire rope 5 is connected to the buckle 3 on the rigid beam connecting plate 1.

[0040] refer to Figure 2 , the lifting hook of the tail crane 14 is arranged on the rigid beam connecting plate 1 at the tail of the water-cooled wall 4. A total of four lifting hooks 8 of the tail crane are arranged, two lifting hooks 8 form a group, and two groups of lifting hooks 8 are arranged on both sides of the water-cooled wall; a steel wire rope 5 is connected between the two lifting hooks 8 of each group, and a pulley 6 is installed on the steel wire rope. The connection sequence of the tail crane 14 and the water-cooled wall 4 is: the hook of the tail crane 14 is connected to the steel wire rope, and the steel wire rope is connected to the pulley lifting holes 21 of the two pulleys 6 respectively.

[0041] refer to Figure 4The main hoist crane 13 is connected to the hanging hole of the water-cooled wall top hanging device 10 through a wire rope 5 and a shackle 3.

[0042] refer to Figure 6 The main crane 13 continues to lift the water-cooled wall 4, and the auxiliary crane and the tail crane cooperate with each other. The multi-lifting point pulley block method cleverly solves the problem of bending and deformation of the water-cooled wall caused by uneven distribution of lifting ears during the lifting process and the inability to change the force direction of the crane.

[0043] refer to Figure 7 The three cranes lift the water-cooled wall 4 slowly from 0° to 90°, and the main crane 13 rotates to lift it to the predetermined position. The auxiliary crane 14 and the tail crane 15 unhook at the same time, the main crane is fully stressed, the water-cooled wall 4 droops naturally, and the main crane 13 slowly rotates to lift the water-cooled wall to the predetermined position. The main crane 13 drops the hook and smoothly lifts the water-cooled wall 4 into the boiler steel frame 12.

[0044] During the three-machine lifting process described in this embodiment, the force of the pulley group composed of multiple pulleys is dispersed to each lifting hook, which improves the stability of the water-cooled wall lifting. The main crane has the fastest lifting speed, the auxiliary crane has the second fastest lifting speed, and the tail crane has the slowest lifting speed. The lifting speeds of the three cranes can be controlled more accurately according to the angular velocity formula to ensure that the water-cooled wall does not bend or deform.

[0045] The scope of protection claimed by the present invention is not limited to the above specific embodiments. For those skilled in the art, the present invention may have various deformations and changes. Any modifications, improvements and equivalent substitutions made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-cooled wall multi-point hoisting construction method, characterized in that: include: Step 1: After calculation, determine and select a three-machine lifting and multi-point lifting method, wherein the three machines include a main lifting crane, an auxiliary lifting crane and a tail crane; Step 2: According to the center of gravity of the water-cooled wall to be lifted, the positions of the lifting hooks of the auxiliary lifting crane and the tail crane are determined. The lifting hook positions of the auxiliary lifting crane are symmetrically selected on both sides of the center of gravity of the water-cooled wall, and the lifting hook position of the tail crane is at the tail of the water-cooled wall; a steel wire rope is connected between the pair of lifting hooks, a pulley is installed on the steel wire rope, and the lifting slings of the auxiliary lifting crane and the tail crane are directly or indirectly connected to the pulley respectively; the main lifting lug of the main lifting crane is set at the top of the water-cooled wall, and the lifting sling of the main lifting crane is connected to the main lifting lug; Step 3: Start the crane, the main crane lifts the water-cooled wall, the auxiliary crane cooperates with the main crane to lift the water-cooled wall, the tail crane and the auxiliary crane work together to keep the water-cooled wall in a straight line, the water-cooled wall is lifted off the ground for observation, and after confirming that there is no abnormality, proceed to the next procedure; Step 4: The main crane continues to exert force to retract the rope. The tail crane and auxiliary crane are connected to the water-cooled wall through pulleys. They cooperate with the main crane to keep the upper, middle and lower parts of the water-cooled wall straight at all times. The water-cooled wall is slowly tilted from 0° to 90° until the water-cooled wall is fully stressed by the main crane. Step 5: The auxiliary crane and the tail crane are unhooked at the same time, the main crane is fully stressed, the water-cooled wall droops naturally, and the boom of the main crane slowly rotates to lift the water-cooled wall to the predetermined position; Step six: Check the installation position. After confirming that it is correct, the main crane drops the hook and steadily lifts the water-cooled wall into the boiler steel structure frame.

2. The water-cooled wall multi-point hoisting construction method according to claim 1 is characterized in that: In step one, three cranes are positioned between the water-wall assembly platform and the boiler island, the main crane is aligned with the top of the water-wall, the auxiliary crane is aligned with the center of gravity of the water-wall, and the tail crane is located at the rear side of the tail of the water-wall.

3. The water-cooled wall multi-point hoisting construction method according to claim 1 or 2, characterized in that: In step 2, the lifting hooks of the auxiliary crane are selected on the rigid beam connecting plates on both sides of the center of gravity of the water-cooled wall.

4. The water-cooled wall multi-point hoisting construction method according to claim 3 is characterized in that: In step 2, a total of 8 lifting hooks of the auxiliary crane are set up, and the above 8 lifting hooks are divided into two groups, 4 lifting hooks in one group, and the two groups of lifting hooks are set on both sides of the water-cooled wall; in each group of lifting hooks, the height squares along the water-cooled wall are the first hook, the second hook, the third hook and the fourth hook in sequence, a steel wire rope is connected between the first hook and the third hook and a first pulley is installed on the steel wire rope, a steel wire rope is connected between the second hook and the fourth hook and a second pulley is installed on the steel wire rope, a third pulley is connected between the pulley lifting holes of the first pulley and the second pulley, and the third pulley is connected to the lifting sling of the auxiliary crane.

5. The water-cooled wall multi-point hoisting construction method according to claim 1 or 4, characterized in that: In step 2, the lifting hook of the tail crane is arranged on the rigid beam connecting plate at the tail of the water-cooled wall.

6. The water-cooled wall multi-point hoisting construction method according to claim 5 is characterized in that: In step 2, a total of 4 lifting hooks of the tail crane are set, two lifting hooks form a group, and the two groups of lifting hooks are set on both sides of the water-cooled wall; a steel wire rope is connected between the two lifting hooks in each group and a pulley is installed on the steel wire rope.

7. The water-cooled wall multi-point hoisting construction method according to claim 6 is characterized in that: In step 2, the main hoist crane is connected to the hanging hole of the hanging device on the top of the water-cooled wall through a wire rope and a shackle.

8. The water-cooled wall multi-point hoisting construction method according to claim 1 or 7, characterized in that: In step three, the water-cooled wall is lifted 300 mm off the ground for observation.

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