Method for assembling a lifting column and lifting column

Abstract

The application discloses a hoisting column assembling method and a hoisting column, and comprises the following steps: installing side plates on both sides of an inner longitudinal wall, the side plates and the inner longitudinal wall forming an installation groove, assembling longitudinal and transverse wall plates in the installation groove to form a frame, then welding an outer longitudinal wall to the frame to form a column body; installing first lifting lugs on the two side plates respectively, installing second lifting lugs on the outer longitudinal wall, lifting the first lifting lugs, the second lifting lugs and third lifting lugs located on the inner longitudinal wall by using a lifting device, turning over the column body, and taking the outer longitudinal wall as a base surface; hoisting the column head and the column body to be connected, welding the inner longitudinal wall and the column head; lifting the first lifting lugs, the second lifting lugs and the third lifting lugs by using the lifting device, turning over the column body and the column head, and taking the inner longitudinal wall as the base surface; welding the outer longitudinal wall and the column head to complete the assembling of the hoisting column, then lifting the first lifting lugs and the second lifting lugs by using the lifting device to make the hoisting column stand vertically. The application solves the problem that the welding quality is difficult to guarantee due to the upwelding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship hoisting column, in particular to a hoisting column assembling method and hoisting column. BACKGROUND

[0002] The multifunctional heavy lifting ship is a popular ship type in recent years, and the most prominent structural feature of this type of ship is the provision of a crane system on the side deck. Due to the narrow and long side deck, the base of the crane (i.e. the hoisting column, which is divided into a column body and a column head) is narrow and long with a certain height. The structural feature of the hoisting column is that the plate thickness is generally 30-60 mm. In the actual construction process, if the hoisting column is assembled vertically, on the one hand, due to the high center of gravity of the structure, the stability is poor, and the welding quality is difficult to guarantee due to the need for overhead welding. In addition, the implementation of high-altitude operation not only increases the operation difficulty, but also forces the construction party to build a high and complex high-altitude operation platform, greatly increasing the construction cost and time consumption. SUMMARY

[0003] The technical problem to be solved by the present application is that the existing hoisting column is vertically assembled, which requires overhead welding, making it difficult to guarantee the welding quality, and the high-altitude operation requires the construction of an operation platform, which not only has a high risk coefficient, but also increases the construction cost.

[0004] To solve the above technical problems, the present application provides a hoisting column assembling method, comprising the following steps:

[0005] Take the inner longitudinal wall as the base surface, install side decks on both sides of the inner longitudinal wall, the side decks and the inner longitudinal wall form an installation groove, assemble longitudinal and transverse wall plates in the installation groove to form a frame, and then weld an outer longitudinal wall on the frame to form a column body;

[0006] Install first lifting lugs on both side decks, and install second lifting lugs on the outer longitudinal wall surface, the first lifting lugs and the second lifting lugs are respectively arranged at both ends of the center of gravity of the column body, then use a lifting device to lift the first lifting lugs, the second lifting lugs and a third lifting lug located on the inner longitudinal wall, the third lifting lug is located on the side of the inner longitudinal wall away from the first lifting lug, to lift the column body for turning over, and take the outer longitudinal wall as the base surface;

[0007] Lift the column head and the column body to abut, and weld the flat corner weld and the vertical corner weld of the joint between the inner longitudinal wall and the column head;

[0008] Use a lifting device to lift the first lifting lugs, the second lifting lugs and the third lifting lug to lift the column body and the column head for turning over, and take the inner longitudinal wall as the base surface;

[0009] welding a fillet weld between the outer longitudinal wall and the column head to complete the assembly of the column, and then hoisting the first lifting lug and the second lifting lug by using a hoisting device to make the column stand upright.

[0010] In some embodiments, the first lifting lug is arranged directly above the center of gravity of the column after the column stands upright to avoid the welding area of the column body and the column head.

[0011] In some embodiments, the first lifting lug is connected to the column body and the column head at a distance of 500-1000 mm.

[0012] In some embodiments, the projection of the second lifting lug in the first direction is 600-1400 mm away from the center of gravity of the column.

[0013] The projection of the third lifting lug in the first direction is 600-1400 mm away from the center of gravity of the column.

[0014] In some embodiments, the first lifting lug, the second lifting lug, and a third lifting lug located on the inner longitudinal wall are hoisted by using a hoisting device, the third lifting lug is located on the side of the inner longitudinal wall away from the first lifting lug, to hoist the column to turn over, and the outer longitudinal wall is used as the base surface, comprising:

[0015] The main hook of the hoisting device is connected to the first lifting lug, the first auxiliary hook of the hoisting device is connected to the second lifting lug, and then the column is hoisted to make the first lifting lug and the second lifting lug at the same height.

[0016] The first auxiliary hook drives the second lifting lug to descend, and the main hook drives the first lifting lug to ascend to the first lifting lug to be fully stressed, so that the column is turned over by 90° to stand upright.

[0017] The second auxiliary hook is connected to the third lifting lug, the main hook drives the first lifting lug to descend, and the second auxiliary hook drives the third lifting lug to descend to gradually flatten the column, so that the outer longitudinal wall is arranged downward as the base surface.

[0018] In some embodiments, the first lifting lug, the second lifting lug, and the third lifting lug are hoisted by using a hoisting device to hoist the column and the column head to turn over, and the inner longitudinal wall is used as the base surface, comprising:

[0019] The main hook of the hoisting device is connected to the first lifting lug, the first auxiliary hook of the hoisting device is connected to the third lifting lug, and then the column and the column head are hoisted to make the first lifting lug and the third lifting lug at the same height.

[0020] The first auxiliary hook drives the third lifting lug to descend, the main hook drives the first lifting lug to ascend to the first lifting lug being fully stressed, so that the column body and the column head are turned over 90° to be vertical;

[0021] The second auxiliary hook is connected with the second lifting lug, the main hook drives the first lifting lug to descend, the second auxiliary hook drives the second lifting lug to descend, so as to drive the column body and the column head to gradually flatten, so that the inner vertical wall is arranged with the base surface downward.

[0022] In some embodiments, the first lifting lug and the second lifting lug are subsequently hoisted by the hoisting device to make the column vertical include:

[0023] The main hook of the hoisting device is connected with the first lifting lug, the auxiliary hook of the hoisting device is connected with the second lifting lug, and the column is subsequently hoisted, so that the first lifting lug and the second lifting lug are at the same height;

[0024] The auxiliary hook drives the second lifting lug to descend, the main hook drives the first lifting lug to ascend to the first lifting lug being fully stressed, so that the column is turned over 90° to be vertical.

[0025] In some embodiments, an included angle is formed between the hoisting rope of the hoisting device and the first lifting lug, and the included angle is less than 30°.

[0026] The application further provides a column, which is assembled by the column assembling method, and comprises a column body, a column head, a first lifting lug, a second lifting lug and a third lifting lug.

[0027] The column body comprises an inner vertical wall, a side plate, a vertical and horizontal wall plate and an outer vertical wall, the side plate is installed on both sides of the inner vertical wall, the side plate and the inner vertical wall form an installation groove, the vertical and horizontal wall plate is installed in the installation groove to form a frame, the outer vertical wall is arranged on the frame, the first lifting lug is installed on the side plate, the second lifting lug is installed on the outer vertical wall, and the third lifting lug is installed on the inner vertical wall.

[0028] In some embodiments, the first lifting lug comprises a main plate and a plurality of surrounding plates, the main plate is provided with a connecting hole connected with the side plate, the plurality of surrounding plates are installed on the main plate, and the plurality of surrounding plates are sequentially connected in a head-to-tail manner to form a hooking part connected with the hoisting device.

[0029] Compared with the prior art, the column assembling method and the column of the embodiments of the application have the following beneficial effects:

[0030] Throughout the assembly process, the column and column head are always placed flat on the ground or workbench through lifting and turning steps. This avoids the problem of poor welding quality caused by overhead welding, and eliminates the need for high-altitude operations, thus avoiding the need to build high-altitude work platforms, ensuring operational safety and reducing costs. Attached Figure Description

[0031] Figure 1 This is a partial exploded view of the column provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the column provided in an embodiment of the present invention;

[0033] Figure 3 This is a side view of the lifting column provided in an embodiment of the present invention;

[0034] Figure 4 This is a front view of the lifting column provided in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the placement of the lifting column provided in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the lifting column after it has been flipped, as provided in an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the overturning process of the lifting column provided in an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the first lifting bracket provided in an embodiment of the present invention;

[0039] In the diagram, 1. Column; 11. Inner longitudinal wall; 12. Side hull plate; 13. Longitudinal and transverse wall plates; 14. Outer longitudinal wall; 2. Column head; 3. First lifting bracket; 31. Main plate; 32. Enclosure plate; 4. Second lifting bracket; 5. Third lifting bracket; 6. Concrete column; 7. Timber block; 8. Steel support structure. Detailed Implementation

[0040] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0041] like Figures 1 to 7 As shown, the present invention provides a method for assembling a lifting column, comprising the following steps:

[0042] S110. Using the inner longitudinal wall 11 as the base surface, install side hull plates 12 on both sides of the inner longitudinal wall 11. The side hull plates 12 and the inner longitudinal wall 11 enclose to form an installation groove. Assemble longitudinal and transverse wall plates in the installation groove to form a frame. Then weld the outer longitudinal wall 14 on the frame to form a column 1.

[0043] This step eliminates the risk of high-altitude operation by completing the preliminary assembly on the ground or support table, and avoids the need for overhead welding when assembling the column 1, thereby improving the welding quality.

[0044] S120, first lifting lugs 3 are respectively installed on the two side shells 12, and second lifting lugs 4 are installed on the outer longitudinal walls 14, the first lifting lugs 3 and the second lifting lugs 4 are respectively arranged at two ends of the center of gravity of the column 1, then the first lifting lugs 3, the second lifting lugs 4 and a third lifting lug 5 located on the inner longitudinal wall 11 are hoisted by a hoisting device, the third lifting lug 5 is located on the side of the inner longitudinal wall 11 away from the first lifting lug 3, so as to hoist the column 1 to turn over and take the outer longitudinal wall 14 as a base surface;

[0045] This step turns over the preliminarily assembled column 1 by the hoisting device through the first lifting lugs 3, the second lifting lugs 4 and the third lifting lug 5, so as to prepare for subsequent welding and assembly of the column head 2, without the need to build a complex high-altitude operation platform, thereby reducing the cost and risk.

[0046] S130, the column head 2 is hoisted and transported to be connected with the column 1, and flat corner welds and vertical corner welds between the inner longitudinal wall 11 and the column head 2 are welded;

[0047] This step hoists and transports the column head 2 to be connected with the turned-over column 1, and completes the welding between the inner longitudinal wall 11 and the column head 2, the embodiment is welded by step-by-step connection and welding, so as to ensure the welding quality, and the structure deformation is reduced by accurate hoisting.

[0048] S140, the first lifting lugs 3, the second lifting lugs 4 and the third lifting lug 5 are hoisted by the hoisting device, so as to hoist the column 1 and the column head 2 to turn over and take the inner longitudinal wall 11 as a base surface;

[0049] This step turns over the column 1 and the column head 2 by the hoisting device through the first lifting lugs 3, the second lifting lugs 4 and the third lifting lug 5, so that the inner longitudinal wall 11 becomes a new base surface, and conditions are created for completing the outer welding, continuously avoiding high-altitude operation, and maintaining the efficiency and safety of the welding work.

[0050] S150, flat corner welds between the outer longitudinal wall 14 and the column head 2 are welded, so as to complete the assembly of the column, then the first lifting lugs 3 and the second lifting lugs 4 are hoisted by the hoisting device, so that the column stands straight.

[0051] Based on the above steps, the column 1 and the column head 2 are always placed on the ground or workbench during the entire assembly process by the hoisting and turning steps, the problem that the welding quality is difficult to guarantee due to overhead welding is avoided, high-altitude operation is not needed, the high-altitude operation platform is avoided, the safety of the operation is ensured, and the cost is reduced.

[0052] It should be noted that the workbench can be composed of concrete columns 6 and piers 7, or can be composed of steel support structures 8.

[0053] In some embodiments, the first lifting lug 3 is arranged directly above the center of gravity of the column after the column is erected, so as to avoid the welding area of the column body 1 and the column head 2. That is, the stress point during lifting is directly located at the center of gravity of the structure, which can maximize the uniform distribution of the load during lifting, avoid local stress concentration, and thus ensure the structural strength and overall stability during lifting. In addition, it can also ensure that the flange surface is horizontal after overall lifting and erection, and try to avoid adjustment when the second lifting lug 4 is connected to the lifting device again.

[0054] Preferably, the first lifting lug 3 is connected to the column body 1 and the column head 2 at a distance of 500-1000mm, so as to ensure that the force borne by the lifting lug during lifting does not directly act on the welding area. The welding area is relatively weak after welding is just completed, and arranging the lifting lug away from this area can avoid damage or cracks of the welding part caused by stress concentration during lifting, so as to ensure the lifting strength and safety of the overall structure.

[0055] It should be noted that the first lifting lug 3 is preferably selected at a strong structural position close to the back of the upper opening of the column, and away from the welding area of the column body 1 and the column head 2. The welding area is a slow-welding area, generally 100-300mm away from the joint of the column body 1 and the column head 2.

[0056] In some embodiments, the projection of the second lifting lug 4 in the first direction is 600-1400mm away from the center of gravity of the column; and the projection of the third lifting lug 5 in the first direction is 600-1400mm away from the center of gravity of the column, so that after the lifting is completed and fixed to the ship, cutting and removal operations can be conveniently performed from the ground or a lower height, without the need for high-altitude operations, thereby reducing the risks and the need for complex high-altitude operation equipment. It should be noted that the first direction is the direction perpendicular to the side plate 12.

[0057] If the column to be lifted is greater than 200t, a gantry crane is selected for column turning, the upper trolley hook is connected to the first lifting lug 3, the front and rear levels are adjusted, and the lower trolley hook is connected to the second lifting lug 4 or the third lifting lug 5.

[0058] In some embodiments, the first lifting lug 3, the second lifting lug 4 and the third lifting lug 5 located on the inner longitudinal wall 11 are then lifted by the lifting device, the third lifting lug 5 is located on the side of the inner longitudinal wall 11 away from the first lifting lug 3, the column body 1 is lifted, and the outer longitudinal wall 14 is used as a base surface, including:

[0059] S121, the main hook of the hoisting device is connected with the first lifting code 3, the first auxiliary hook of the hoisting device is connected with the second lifting code 4, and then the column 1 is hoisted, so that the first lifting code 3 and the second lifting code 4 are at the same height, the stability and safety of the column 1 in the initial hoisting stage are ensured, and preparation is made for the subsequent overturning operation.

[0060] S122, the first auxiliary hook drives the second lifting code 4 to descend, the main hook drives the first lifting code 3 to ascend to the first lifting code 3 completely stressed, so that the column 1 is overturned by 90° to realize the verticality, the stability and safety in the overturning process are ensured, and the structure is prevented from being damaged.

[0061] S123, the second auxiliary hook is connected with the third lifting code 5, the main hook drives the first lifting code 3 to descend, and the second auxiliary hook drives the third lifting code 5 to descend, so as to drive the column 1 to gradually flatten, so that the outer longitudinal wall 14 is arranged with the base surface downward, the safety and controllability of the whole operation process are ensured, and the safety and controllability of the whole operation process are ensured.

[0062] Based on the above steps, the column 1 horizontally placed is overturned to the vertical state, and finally adjusted to the flat posture with the outer longitudinal wall 14 as the bottom base surface, so as to facilitate the subsequent installation or operation, the complexity and danger of directly adjusting greatly in the air are avoided, the safety and efficiency of the operation are greatly improved, the dependence on the complex aerial work platform is reduced, and the cost and time are saved.

[0063] It can be understood that the first auxiliary hook and the second auxiliary hook can be the same structure or two independent structures.

[0064] In some embodiments, the first lifting code 3, the second lifting code 4 and the third lifting code 5 are hoisted by the hoisting device to hoist the column 1 and the column head 2 to turn over, and the inner longitudinal wall 11 is taken as the base surface.

[0065] S141, the main hook of the hoisting device is connected with the first lifting code 3, the first auxiliary hook of the hoisting device is connected with the third lifting code 5, and then the column 1 and the column head 2 are hoisted, so that the first lifting code 3 and the third lifting code 5 are at the same height, preparation is made for the subsequent overturning operation, and the structural stability in the hoisting process is ensured.

[0066] S142, the first auxiliary hook drives the third lifting code 5 to descend, the main hook drives the first lifting code 3 to ascend to the first lifting code 3 completely stressed, so that the column 1 and the column head 2 are overturned by 90° around the center of gravity, and the verticality is realized as the first lifting code 3 completely bears the main supporting force in the overturning;

[0067] S143, the second auxiliary hook is connected with the second lifting lug 4, the main hook drives the first lifting lug 3 to descend, the second auxiliary hook drives the second lifting lug 4 to descend, so as to drive the column body 1 and the column head 2 to gradually flatten, so that the inner vertical wall 11 is arranged with the base surface downward, ensuring that the column body 1 and the column head 2 are placed in a correct and convenient subsequent operation posture, facilitating subsequent welding or other installation work.

[0068] Based on the above steps, the present embodiment realizes safe overturning and precise positioning of the column body 1 with the column head 2 in the assembly process by the lifting and overturning steps, fully utilizes the double-hook cooperation capability of the lifting device, not only improves the operation efficiency, but also significantly enhances the safety of the operation, reduces the dependence on expensive and complex aerial work platforms, and is an effective method to improve the construction efficiency and reduce the cost.

[0069] In some embodiments, the first lifting lug 3 and the second lifting lug 4 are subsequently hoisted by the lifting device to make the lifting column stand straight, including the specific operation steps of overturning the partially assembled lifting column from a horizontal state to a vertical state by the lifting device, the purpose of which is to complete the final assembly position adjustment of the lifting column, facilitating subsequent installation or further processing.

[0070] S151, the main hook of the lifting device is connected with the first lifting lug 3, the auxiliary hook of the lifting device is connected with the second lifting lug 4, and then the lifting column is lifted, so that the first lifting lug 3 and the second lifting lug 4 are at the same height, creating stable starting conditions for the overturning operation, ensuring the balance of the lifting column in the air and reducing the stress concentration that may occur during overturning.

[0071] S152, the auxiliary hook drives the second lifting lug 4 to descend, and the main hook drives the first lifting lug 3 to rise to the first lifting lug 3 to be fully stressed, so that the lifting column is overturned by 90° to stand straight.

[0072] After the lifting column is safely lifted and balanced, the second lifting lug 4 is slowly lowered by the auxiliary hook, and the first lifting lug 3 is appropriately lifted by the main hook as needed in the present embodiment, so as to gradually shift the center of gravity of the lifting column until the first lifting lug 3 fully bears the weight of the lifting column, thereby realizing the overturning of the lifting column by about 90° to reach the vertical state, facilitating subsequent final positioning.

[0073] In some embodiments, an angle is formed between the hoisting rope of the hoisting device and the first lifting lug 3, and the angle is less than 30°, which can effectively reduce the lateral (transverse) tension acting on the lifting lug during hoisting. When hoisting heavy objects, if the connecting line between the hoisting rope and the lifting point is too inclined, it will increase the lateral pressure on the lifting lug and the connecting structure, which may cause the lifting lug to deform, the connecting piece to loosen or the structure to be damaged. By keeping a small angle, when the hoisting rope is nearly perpendicular to the lifting lug, the center of gravity of the hoisting column and the direction of the hoisting force are more aligned, which can make the hoisting force more concentrated in the vertical direction, help to reduce the possibility of the hoisting column swinging in the air, make the hoisting process more smooth, reduce the probability of accidents, and ensure that the hoisting process is more stable and safe.

[0074] It should be noted that the second lifting lug 4 and the third lifting lug 5 can also be hoisted simultaneously in this embodiment. During hoisting, the verticality of the hoisting column is observed, and if there is any inclination, the second lifting lug 4 or the third lifting lug 5 can be hung to adjust. If it is inclined outward, the second lifting lug 4 can be hung to adjust; if it is inclined inward, the third lifting lug 5 can be hung to adjust. By keeping the relative spatial relationship of the upper and lower trolley hooks (i.e. ensuring the verticality of the hoisting column), the hoisting is completed by synchronously lifting and lowering the walking gantry crane and the upper and lower trolley.

[0075] The present application also provides a hoisting column assembled by the hoisting column assembly method described above, which comprises a column body 1, a column head 2, a first lifting lug 3, a second lifting lug 4 and a third lifting lug 5, and the column body 1 is connected with the column head 2.

[0076] The column body 1 comprises an inner longitudinal wall 11, a side plate 12, a longitudinal and transverse wall plate 13 and an outer longitudinal wall 14. The side plate 12 is installed on both sides of the inner longitudinal wall 11, and the side plate 12 and the inner longitudinal wall 11 form an installation groove to provide space for the installation of the longitudinal and transverse wall plate 13. The longitudinal and transverse wall plate 13 is installed in the installation groove to form a frame, and the outer longitudinal wall 14 is arranged on the frame to enhance the strength and sealing performance of the whole. The first lifting lug 3 is installed on the side plate 12, the second lifting lug 4 is installed on the outer longitudinal wall 14, and the third lifting lug 5 is installed on the inner longitudinal wall 11.

[0077] The first lifting lug 3 and the second lifting lug 4 of this embodiment are respectively installed on the side plate 12 and the outer longitudinal wall 14, which are used for overall hoisting and overturning the column body 1. The third lifting lug 5 is installed on the inner longitudinal wall 11, which is mainly used for overturning operation after the combination of the column body 1 and the column head 2. By using the method of ground pre-assembly and step-by-step overturning, the demand for high-altitude operation is significantly reduced, the overhead welding is avoided, and the welding quality and efficiency are improved. At the same time, the operation safety is improved, and the cost and time for building a complex high-altitude operation platform are reduced.

[0078] It should be noted that, in order to ensure the stability and safety of the overturning process, the third lifting lug 5 is arranged at the lower two openings of the inner longitudinal wall 11, and the second lifting lug 4 is arranged at the lower two openings of the outer longitudinal wall 14.

[0079] As shown in the drawings, Figure 8 The first lifting lug 3 comprises a main plate 31 and a plurality of surrounding plates 32, the main plate 31 is provided with a connecting hole connected with the side plate 12, so that the first lifting lug 3 can be firmly fixed on the side plate 12 of the lifting column, and provides a base point for subsequent lifting operation, the plurality of surrounding plates 32 are installed on the main plate 31 and connected in sequence, so as to form a hooking part connected with the lifting device, and the overall structural strength of the first lifting lug 3 is enhanced, so that the first lifting lug 3 can keep the shape unchanged when bearing the great tension generated in the lifting process, the stress is dispersed, and the safety is further improved.

[0080] It should be noted that the main plate 31 is away from the front and rear inner longitudinal walls 11 and the outer longitudinal walls 14 by a distance of half the width of the shackle, so as to facilitate the installation and removal of the shackle, and in addition, the main plate 31 of the lifting lug is parallel to the turning structure surface.

[0081] In summary, the first lifting lug 3 of the lifting column assembly method and the lifting column provided by the embodiment of the present application can be used as the lifting lug of the column body 1 and the whole lifting column, so as to reduce the number of lifting lugs. In the whole assembly process of the embodiment, the column body 1 and the column head 2 are always placed on the ground or the workbench for operation through the lifting and turning steps, so as to avoid the problem that the welding quality is difficult to guarantee due to overhead welding, and high-altitude operation is not required, so as to avoid the construction of high-altitude operation platform, ensure the safety of operation and reduce the cost.

[0082] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should be considered as the protection scope of the present application.

Claims

1. A method for assembling a lifting column, characterized in that, Includes the following steps: Using the inner longitudinal wall as the base surface, side hull plates are installed on both sides of the inner longitudinal wall. The side hull plates and the inner longitudinal wall enclose an installation groove. Longitudinal and transverse wall panels are assembled in the installation groove to form a frame. Then, outer longitudinal walls are welded onto the frame to form a column. First lifting brackets are installed on the two side plates respectively, and second lifting brackets are installed on the outer longitudinal wall. The first and second lifting brackets are located at opposite ends of the center of gravity of the column. Then, a lifting device is used to lift the first lifting bracket, the second lifting bracket, and a third lifting bracket located on the inner longitudinal wall. The third lifting bracket is located on the side of the inner longitudinal wall away from the first lifting bracket, so as to lift the column and turn it over, with the outer longitudinal wall as the base surface. The main hook of the lifting device is connected to the first lifting bracket, and the first auxiliary hook of the lifting device is connected to the second lifting bracket. Then, the column is lifted so that the first and second lifting brackets are at the same height. The first auxiliary hook drives the second lifting weight to descend, and the main hook drives the first lifting weight to rise until the first lifting weight is fully stressed, causing the column to rotate 90° to stand upright. The second auxiliary hook is connected to the third lifting bracket. The main hook drives the first lifting bracket to descend, and the second auxiliary hook drives the third lifting bracket to descend, so as to gradually flatten the column body, so that the outer longitudinal wall is set with the base surface facing down. The column head is hoisted and connected to the column body, and the flat fillet weld and vertical fillet weld of the inner longitudinal wall and the column head are welded together. The first, second, and third lifting brackets are hoisted using a lifting device to lift the column and column head for turning, with the inner longitudinal wall as the base surface; wherein, the main hook of the lifting device is connected to the first lifting bracket, and the first auxiliary hook of the lifting device is connected to the third lifting bracket, and then the column and column head are lifted so that the first and third lifting brackets are at the same height; The first auxiliary hook drives the third lifting weight to descend, and the main hook drives the first lifting weight to rise until the first lifting weight is fully stressed, so that the column body and the column head rotate 90° to achieve an upright position; The second auxiliary hook of the lifting device is connected to the second lifting weight. The main hook drives the first lifting weight to descend, and the second auxiliary hook drives the second lifting weight to descend, so as to gradually level the column body and the column head, so that the inner longitudinal wall is set with the base surface facing down. The outer longitudinal wall and the column head are welded with fillet welds to complete the assembly of the lifting column. Then, the first lifting bracket and the second lifting bracket are hoisted using a lifting device to make the lifting column stand upright.

2. The method for assembling lifting columns according to claim 1, characterized in that, The first lifting bracket is positioned directly above the center of gravity of the lifting column after it is erected, so as to avoid the welding area between the column body and the column head.

3. The method for assembling lifting columns according to claim 2, characterized in that, The distance between the first lifting bracket and the connection point between the column body and the column head is 500-1000mm.

4. The method for assembling lifting columns according to claim 1, characterized in that, The distance between the projection of the second lifting bracket in the first direction and the center of gravity of the lifting column is 600-1400mm; The distance between the projection of the third lifting bracket in the first direction and the center of gravity of the lifting column is 600-1400mm.

5. The method for assembling a lifting column according to claim 1, characterized in that, The subsequent use of a lifting device to hoist the first and second lifting brackets so that the lifting column is erected includes: The main hook of the lifting device is connected to the first lifting bracket, and the auxiliary hook of the lifting device is connected to the second lifting bracket. Then the lifting column is lifted so that the first lifting bracket and the second lifting bracket are at the same height. The auxiliary hook drives the second lifting weight to descend, and the main hook drives the first lifting weight to rise until the first lifting weight is fully stressed, causing the lifting column to rotate 90° to achieve an upright position.

6. The method for assembling a lifting column according to claim 1, characterized in that, The lifting rope of the lifting device forms an angle with the first lifting weight, and the angle is less than 30°.

7. A lifting column, assembled using the lifting column assembly method as described in any one of claims 1-6, characterized in that, The lifting column includes a column body, a column head, a first lifting bracket, a second lifting bracket, and a third lifting bracket, with the column body connected to the column head; The column includes an inner longitudinal wall, side panels, longitudinal and transverse bulkheads, and an outer longitudinal wall. Side panels are installed on both sides of the inner longitudinal wall. The side panels and the inner longitudinal wall enclose an installation groove. The longitudinal and transverse bulkheads are installed in the installation groove to form a frame. The outer longitudinal wall covers the frame. The first lifting bracket is installed on the side panel, the second lifting bracket is installed on the outer longitudinal wall, and the third lifting bracket is installed on the inner longitudinal wall.

8. The lifting column according to claim 7, characterized in that, The first lifting bracket includes a main board and multiple side panels. The main board has connection holes for connecting to the side panels. The multiple side panels are installed on the main board and are connected end to end in sequence to form a hook connection for connecting to the lifting device.

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