A method for installing the tower boom of a tower crane used in the expansion of a large factory building.

Abstract

This invention pertains to tower crane installation methods, specifically a method for installing the tower boom of a tower crane used in the expansion of large factory buildings. It involves selecting the optimal location for a truck crane to lift the tower boom components onto the factory roof, taking into account the available space at the end of the factory building being renovated or expanded. From this location to the tower body installation point, a continuous temporary support is installed on the lower roof beam where the tower crane will be located. This temporary support provides support for the transportation and online assembly of the tower boom components. A lifting mast is then used in conjunction with the lifting operation to complete the installation of the tower crane's counterweight, balancing weight, and boom. This method solves the problem of conventionally assembled tower cranes being obstructed by the roof structure during lifting and positioning in enclosed factory roof areas. It completes the assembly work for tower cranes erected on the roof, reduces the difficulty of positioning large steel structure components after the factory roof is enclosed, and ensures the progress of the project construction.

Description

Technical Field

[0001] This invention pertains to tower crane installation methods, specifically a method for installing the tower arm of a tower crane suitable for the expansion of large factory buildings. Background Technology

[0002] In large metallurgical production workshops with varying heights and overall layouts, partial renovations or expansions should generally not affect the normal production of other production lines, except for the areas being renovated or expanded where normal construction can be carried out. In the construction of large metallurgical plant structures, due to the heavy weight and long dimensions of the steel structural components, large mobile lifting equipment is typically used. These equipment are positioned within or outside the spans of the plant structure, and the steel structural components are hoisted section by section and layer by layer. However, in renovation or expansion projects, although the construction area is smaller than that of a newly built plant, the renovation or expansion area still involves numerous installation points and long lines. Using tower cranes for this type of renovation or expansion, with a covering hoisting method for the steel structural components, minimizes the amount of demolition work required. In these cases, the plant roof is already enclosed. With conventionally assembled tower cranes, the installed and deployed counterweight and lifting arms are obstructed by the roof structure during the lifting process, preventing the tower crane from directly lifting the components above the roof. The difficulty in positioning the steel structural components in the numerous points and long lines of the renovation or expansion area, coupled with low construction efficiency, hinders the project's progress. Summary of the Invention

[0003] The technical problem to be solved by this invention is to propose a method for installing the tower arm of a tower crane for the expansion of a large factory building. This method solves the problem of lifting the tower crane after the factory roof is closed, completes the assembly work of erecting the tower crane on the roof, reduces the difficulty of positioning large steel structure components after the factory roof is closed, and ensures the progress of the project construction.

[0004] To achieve the above objectives, this invention provides a method for installing the tower boom of a tower crane used in the expansion of a large factory building. This method involves selecting the optimal lifting position of the tower boom component onto the factory roof using a truck crane, taking into account the end area space of the factory building being renovated or expanded. From this position to the tower crane's mounting point, a continuous temporary support is installed on the lower roof beam where the tower crane will be located. This temporary support provides support for the transport and online assembly of the tower boom component. A lifting mast is then used in conjunction with the lifting operation to complete the installation of the tower crane's counterweight, balancing weight, and boom. This method solves the problem of conventionally assembled tower cranes being obstructed by the roof structure during lifting and positioning in enclosed factory roof areas. The steps are as follows:

[0005] Step 1: Construct a walkway and install lifting equipment on the lower roof 10:

[0006] Based on the spatial dimensions of the low-rise roof 10 area at the end of the factory building and the tower crane erection point, and considering the optimal location of the factory building end that allows for the stationing of ground-based truck cranes and the lifting of loads onto the low-rise roof 10, a through-type temporary transport support 8 is erected between the tower crane erection point and the selected factory building end location. This creates a channel for transporting the tower arm structure on the low-rise roof 10. Lifting masts 9 are installed on the temporary support 8 at the required lifting points for connecting the counterweight 2, counterweight 1, counterweight 2, lifting arm 6, and tower body 1. The lifting masts 9 are made of short steel pipes in sections, with flanges at both ends of each section. The sections are connected one by one with bolts to assemble the lifting masts 9. Lifting lugs are provided at the top of the lifting masts 9.

[0007] Step 2: Assembly of counterweight 2 and placement of the front counterweight:

[0008] Based on the tower body 1 being raised from the lifting hole 15 of the lower roof 10, the counterweight arm 2 is first assembled into a whole on the temporary support 8 of the lower roof 10 according to its connection structure with the tower body 1. Then, two hand-operated hoists are hung at the lifting lugs set at the upper end of the lifting mast 9. One hand-operated hoist is connected to the center of gravity of the assembled counterweight arm 2 to keep the counterweight arm 2 in a horizontal position. The lifting point of the other hand-operated hoist is moved a small distance to the right of the center of gravity of the counterweight arm 2, so that the right end of the counterweight arm 2 changes from the original horizontal position to an upward tilt of 200mm under the action of this hand-operated hoist. Then, with the joint adjustment of the slightly tilted counterweight arm 2 by the two hand-operated hoists, the left end of the counterweight arm 2 is first connected to the tower body 1. Then, the lower end of the counterweight arm tie rod 5, which is set at the upper end of the tower body 1, is connected to the counterweight arm 2. The two hand-operated hoists are then slowly unloaded, thereby completing the connection and fixation of the counterweight arm 2 and the tower body 1.

[0009] Then, using the lifting mast 9, the counterweight 3, which was moved from the temporary support 8, is hoisted to the corresponding position on the counterweight boom 2, thus completing the placement of the front counterweight on the counterweight boom 2.

[0010] Step 3: Assembly of Crane Boom 6

[0011] First, rotate the tower body 1 by 180° so that the connection part of the lifting arm 6 on the tower body 1 corresponds to the position of the temporary support 8 set on the lower roof 10. Using the same method as the connection and fixing of the counterweight arm 2 to the tower body 1, the lifting mast 9 and the lifting arm tie rod 7 work together to complete the hoisting and fixing of the lifting arm 6.

[0012] Step 4: Positioning the counterweight on the rear side of counterweight boom 2 and raising the tower crane:

[0013] Rotate the tower body 1 by 180° so that the counterweight 2 of the tower body 1 is in the corresponding position of the temporary support 8 on the lower roof 10. Use the lifting mast 9 to complete the placement of the counterweight 4 on the counterweight 2. If the tower crane counterweight 2 cannot rotate to the corresponding position of the temporary support 8 on the lower roof 10 due to the obstruction of the rotation of the lifting arm 6 by the high-rise factory building 11, the counterweight 2 can be made into a box 12 of the counterweight 4 by using steel plates and round bars 13 according to the corresponding size and weight of the counterweight 4 on the counterweight 2. Then, it can be directly placed in the corresponding position on the counterweight 2. Then, according to the corresponding weight of the counterweight 4, the required weight of concrete 14 is poured into the box 12 of the counterweight 4 on site to realize the placement and positioning of the counterweight 4 on the counterweight 2.

[0014] After all the counterweights 2 and 4 are in place on the counterweight boom 2, the self-lifting performance of the tower crane is used to lift the tower body 1 until the boom 6 reaches the height required for the hoisting of the steel structure components for the renovation or expansion. This completes the work of lifting the tower boom from the enclosed roof.

[0015] Furthermore, the temporary support 8 includes H-beams that are fixed to the columns by means of the steel beam spacing of the lower roof 10, and steel sections that are installed on top of the numerous H-beams to support the transport of the tower arm structure.

[0016] Furthermore, the round bar 13 is a support component for the box 12 fabricated on-site by the counterweight 24 and hung on the balance arm 2. It passes through the two side plates on the upper side of the box 12 in the width direction and is welded together to form a whole.

[0017] The present invention proposes a method for installing the tower boom of a tower crane used in the expansion of a large factory building. This method involves selecting the optimal location for a truck crane to lift the tower boom component onto the factory roof, taking into account the end area space of the factory building being renovated or expanded. From this location to the tower body installation point, a continuous temporary support is installed on the lower roof beam where the tower crane will be located. This temporary support provides support for the transportation and online assembly of the tower boom component. A lifting mast is then used in conjunction with the lifting operation to complete the installation of the tower crane's counterweight, balance weight, and boom. This method solves the problem of conventionally assembled tower cranes being obstructed by the roof structure during lifting and positioning in enclosed factory roof areas. It completes the assembly work for tower cranes erected on the roof, reduces the difficulty of positioning large steel structure components after the factory roof is enclosed, and ensures the progress of the project construction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the arrangement of temporary supports and lifting masts in a tower crane boom installation method for large factory expansion proposed in this invention.

[0019] Figure 2 This is a schematic diagram of the counterweight arm installation;

[0020] Figure 3 This is a schematic diagram of the crane boom installation;

[0021] Figure 4 This is a schematic diagram of the setup for counterweight two;

[0022] Figure 5 This is a schematic diagram showing the tower crane ready for operation after it has been raised to its current position.

[0023] Figure 6 This is a schematic diagram of the two-box balance weight;

[0024] Figure 7 yes Figure 6 View A.

[0025] In the diagram: 1. Tower body; 2. Counterweight boom; 3. Counterweight 1; 4. Counterweight 2; 5. Counterweight boom tie rod; 6. Lifting boom; 7. Lifting boom tie rod; 8. Temporary support; 9. Lifting mast; 10. Low-rise roof; 11. High-rise factory building; 12. Box body; 13. Round bar; 14. Concrete; 15. Lifting hole. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] A steel plant expanded and upgraded its existing two 120t converters by adding another 120t converter. This involved nearly 2000 tons of steel structure work, including the renovation and expansion of the high-span steel structure. The expansion area included the installation of a six-story equipment steel structure platform, with a total height of 52m and a width of 24m. A tower crane jib installation method for large-scale plant expansion was adopted to solve the problem of conventionally assembled tower cranes being obstructed by the roof structure during lifting and positioning in enclosed areas. This method successfully completed the assembly of the tower crane on the roof, resolving the challenge of vertically hoisting steel structure components for large-scale plant expansions. See attached diagram for details.

[0028] A method for installing the tower boom of a tower crane used in the expansion of a large factory building involves selecting the optimal position for a truck crane to lift the tower boom components to the roof of the factory building, taking into account the end area space of the factory building being renovated or expanded. From this position to the tower crane's mounting point, a continuous temporary support is installed on the lower roof beam where the tower crane is located. This temporary support provides support for the transportation and online assembly of the tower boom components. A lifting mast is then used for hoisting, thus completing the installation of the tower crane's counterweight, balancing weight, and lifting boom. The steps are as follows:

[0029] like Figure 1 As shown, the first step is to construct a passageway and install lifting equipment on the lower roof 10:

[0030] Based on the spatial dimensions of the low-rise roof 10 area at the end of the factory building and the tower crane erection point, and considering the optimal location of the factory building end that allows for the stationing of ground-based truck cranes and the lifting of loads onto the low-rise roof 10, a through-type temporary transport support 8 is erected between the tower crane erection point and the selected factory building end location. This creates a channel for transporting the tower arm structure on the low-rise roof 10. Lifting masts 9 are installed on the temporary support 8 at the required lifting points for connecting the counterweight 2, counterweight 1, counterweight 2, lifting arm 6, and tower body 1. The lifting masts 9 are made of short steel pipes in sections, with flanges at both ends of each section. The sections are connected one by one with bolts to assemble the lifting masts 9. Lifting lugs are provided at the top of the lifting masts 9.

[0031] like Figure 2 As shown, the second step: assembling the balance arm 2 and positioning the front counterweight:

[0032] Based on the tower body 1 being raised from the lifting hole 15 of the lower roof 10, the counterweight arm 2 is first assembled into a whole on the temporary support 8 of the lower roof 10 according to its connection structure with the tower body 1. Then, two hand-operated hoists are hung at the lifting lugs set at the upper end of the lifting mast 9. One hand-operated hoist is connected to the center of gravity of the assembled counterweight arm 2 to keep the counterweight arm 2 in a horizontal position. The lifting point of the other hand-operated hoist is moved a small distance to the right of the center of gravity of the counterweight arm 2, so that the right end of the counterweight arm 2 changes from the original horizontal position to an upward tilt of 200mm under the action of this hand-operated hoist. Then, with the joint adjustment of the slightly tilted counterweight arm 2 by the two hand-operated hoists, the left end of the counterweight arm 2 is first connected to the tower body 1. Then, the lower end of the counterweight arm tie rod 5, which is set at the upper end of the tower body 1, is connected to the counterweight arm 2. The two hand-operated hoists are then slowly unloaded, thereby completing the connection and fixation of the counterweight arm 2 and the tower body 1.

[0033] The temporary support 8 includes H-beams that are fixed to the columns by means of the steel beam spacing of the low roof 10, and steel sections that are installed on top of the numerous H-beams to support the transport of the tower arm structure.

[0034] Then, using the lifting mast 9, the counterweight 3, which was moved from the temporary support 8, is hoisted to the corresponding position on the counterweight boom 2, thus completing the placement of the front counterweight on the counterweight boom 2.

[0035] like Figure 3 As shown, the third step: assembling the crane boom 6:

[0036] First, rotate the tower body 1 by 180° so that the connection part of the lifting arm 6 on the tower body 1 corresponds to the position of the temporary support 8 set on the lower roof 10. Using the same method as the connection and fixing of the counterweight arm 2 to the tower body 1, the lifting mast 9 and the lifting arm tie rod 7 work together to complete the hoisting and fixing of the lifting arm 6.

[0037] like Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, step four: positioning the counterweight on the rear side of counterweight boom 2 and raising the tower crane:

[0038] Rotate the tower body 1 by 180° so that the counterweight 2 of the tower body 1 is in the corresponding position of the temporary support 8 on the lower roof 10. Use the lifting mast 9 to complete the placement of the counterweight 4 on the counterweight 2. If the tower crane counterweight 2 cannot rotate to the corresponding position of the temporary support 8 on the lower roof 10 due to the obstruction of the rotation of the lifting arm 6 by the high-rise factory building 11, the counterweight 2 can be made into a box 12 of the counterweight 4 by using steel plates and round bars 13 according to the corresponding size and weight of the counterweight 4 on the counterweight 2. Then, it can be directly placed in the corresponding position on the counterweight 2. Then, according to the corresponding weight of the counterweight 4, the required weight of concrete 14 is poured into the box 12 of the counterweight 4 on site to realize the placement and positioning of the counterweight 4 on the counterweight 2.

[0039] After all the counterweights 2 and 4 are in place on the counterweight boom 2, the self-lifting performance of the tower crane is used to lift the tower body 1 until the boom 6 reaches the height required for the hoisting of the steel structure components for the renovation or expansion. This completes the work of lifting the tower boom from the enclosed roof.

[0040] The round bar 13 is a support component for the box 12 fabricated on-site by the counterweight 24 and hung on the balance arm 2. It passes through the two side plates on the upper side of the box 12 in the width direction and is welded together.

Claims

1. A tower crane tower arm installation method for large factory expansion, characterized in that, The installation steps are as follows: First step: set up a channel on the low-level roof (10) and set up a lifting device: According to the space size of the low-level roof (10) area at the end of the factory and the tower crane erection point and the best position of the factory end that meets the ground automobile lifting station and hoists the hoisting objects to the low-level roof (10), a through temporary support (8) is erected between the tower crane erection point and the selected factory end position to realize the setting of the channel for the tower arm structure transportation on the low-level roof (10), and temporary supports (8) are set up on the lifting points of the temporary supports (8) required for the connection of the balance arm (2), the balance weight one (3), the balance weight two (4), the lifting arm (6) and the tower body (1) to set up the lifting mast (9), the lifting mast (9) is made of short steel pipes in sections, and flanges are arranged at both ends of each short pipe, the short pipes are connected by bolts, the assembly of the lifting mast (9) is realized, and an ear is arranged at the top end of the lifting mast (9); Second step: balance arm (2) assembly and front side balance weight positioning: According to the lifting of the tower body (1) out of the low-level roof (10) from the lifting hole (15) of the low-level roof (10) as a reference, the balance arm (2) is assembled into an integral whole on the temporary support (8) of the low-level roof (10) according to its connection structure with the tower body (1); two hand-operated hoists are hung on the lifting ear arranged at the upper end of the lifting mast (9), one of the hand-operated hoists is connected to the center of gravity of the balance arm (2) which has been assembled into an integral whole, so that the balance arm (2) is kept in a horizontal state, and the lifting point of the other hand-operated hoist is moved a small distance to the right side of the center of gravity of the balance arm (2), so that the right end of the balance arm (2) is tilted upward by 200mm from the original horizontal state, then under the joint adjustment of the two hand-operated hoists to the spatial position of the slightly tilted balance arm (2), the left end of the balance arm (2) is connected to the tower body (1) first, then the lower end of the balance arm pull rod (5) which has been arranged at the upper end of the tower body (1) is connected to the rear of the balance arm (2), and then the two hand-operated hoists are slowly unloaded, so that the connection and fixation of the balance arm (2) and the tower body (1) are completed; Then the balance weight one (3) is moved to the position by the lifting mast (9) from the temporary support (8) and hoisted to the corresponding position of the balance arm (2), so that the front side balance weight of the balance arm (2) is positioned; Third step: lifting arm (6) assembly: First, rotate the tower body (1) by 180°, so that the connection part of the lifting arm (6) on the tower body (1) corresponds to the position of the temporary support (8) arranged on the low-level roof (10), and the lifting and fixation of the lifting arm (6) are completed by the joint action of the lifting mast (9) and the lifting arm pull rod (7) in the same way as the connection and fixation of the balance arm (2) and the tower body (1); Fourth step: positioning of the rear side balance weight of the balance arm (2) and lifting of the tower crane: The tower body (1) is rotated 180°, the counterweight (2) of the tower body (1) is positioned at the corresponding position of the temporary support (8) on the low-level roof (10), the counterweight (4) is positioned on the corresponding position of the counterweight (2) by using the lifting mast (9), and the counterweight (4) is positioned on the corresponding position of the counterweight (2) by using the lifting mast (9). When the high-level plant (11) blocks the rotation of the lifting arm (6), the counterweight (2) cannot be rotated to the corresponding position of the temporary support (8) on the low-level roof (10). According to the corresponding size of the counterweight (4) on the counterweight (2) and the weight of the counterweight (4) itself, the box (12) of the counterweight (4) is made of steel plate and round bar (13), and the box (12) of the counterweight (4) is directly positioned on the corresponding position of the counterweight (2). Then, according to the corresponding weight of the counterweight (4), the required weight of concrete (14) is poured into the box (12) of the counterweight (4) on site, so as to realize the setting and positioning of the counterweight (4) on the counterweight (2). After the counterweight (4) is positioned on the corresponding position of the counterweight (2), the tower body (1) is jacked up by using the self-lifting performance of the tower crane until the lifting arm (6) reaches the height required for hoisting the modified or expanded steel structure, and the work of installing the tower arm of the tower crane from the closed roof is completed.

2. The tower arm installation method of the tower crane for expanding the large plant according to claim 1, characterized in that, The temporary support (8) comprises H-shaped steel fixed by setting the vertical column according to the spacing of the steel beam of the low-level roof (10), and the profile steel for supporting the tower arm structure transportation and installed on the top of the H-shaped steel.

3. The tower arm installation method of the tower crane for expanding the large plant according to claim 1, characterized in that, The round bar (13) is a support for hanging the box (12) of the counterweight (4) on the counterweight (2), which passes through the two side plates on the width direction of the box (12) and is welded into one body.

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