Quick disassembly and assembly type jacking device for super-large-area steel net rack and using method of quick disassembly and assembly type jacking device

Abstract

The invention relates to the technical field of building steel structure construction, and discloses a quick disassembly and assembly type jacking device for an ultra-large-area steel net rack and a using method.The quick disassembly and assembly type jacking device comprises a jacking support body, the jacking support body is provided with at least two transverse supporting units and two longitudinal adjusting units, and first support columns of the transverse supporting units are fixed through connecting beams; a left adjusting beam and a right adjusting beam of the longitudinal adjusting unit are rotationally connected with the bracket column; a first connecting beam is provided with a side positioning plate which is detachably locked with the right adjusting beam; the support columns can be spliced and heightened through the supporting plates and are matched with a fast-assembly type jacking mechanism and a steel net frame temporary supporting structure. According to the foldable support, the left adjusting beam and the right adjusting beam which are rotatably connected are matched with the two transverse supporting units, the whole support can be folded and unfolded without disassembling a core bearing component, the occupied space of the support is greatly reduced after folding, and the problems that after a traditional support is disassembled, parts are scattered and prone to being lost, and the occupied space for transportation and storage is large are solved.

Description

Technical Field

[0001] This invention relates to the field of steel structure construction technology, and in particular to a rapid disassembly and assembly jacking device and its usage method for ultra-large area steel space frames. Background Technology

[0002] Large-area steel space frames are widely used in large-span public and industrial buildings such as large factories, stadiums, airport terminals, and convention centers due to their advantages of large span, light weight, good rigidity, and high degree of industrialization. The jacking method is the mainstream construction technology for assembling large-area steel space frames on the ground and positioning them at high altitudes. Its core relies on the jacking support device to achieve the stable and safe jacking of the steel space frame.

[0003] In the existing technology, conventional steel grid lifting support devices mostly adopt welded fixed structures. On-site assembly requires a lot of welding work, and the disassembly and assembly process is cumbersome, which greatly prolongs the construction cycle. Moreover, the support is an integral fixed structure that cannot be folded and stored. After disassembly, the parts are scattered and messy, which not only takes up a lot of space for transportation and storage, but also makes it easy for parts to be lost or damaged, resulting in high turnover and usage costs. Summary of the Invention

[0004] To overcome the above shortcomings, this invention provides a quick-assembly and disassembly lifting device and its usage method for ultra-large area steel space frames, solving the problems of cumbersome assembly and disassembly processes, low efficiency, and inability to be folded and stored in existing lifting supports.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a quick-assembly and disassembly lifting device for ultra-large area steel space frame, comprising a lifting support body, wherein the lifting support body comprises at least two sets of parallel transverse support units and two sets of longitudinal adjustment units;

[0006] The transverse support unit includes two parallel first support columns, a first connecting beam, and a second connecting beam. The two first support columns are fixedly connected by the first connecting beam or the second connecting beam.

[0007] The longitudinal adjustment unit includes a left adjustment beam and a right adjustment beam. The two ends of the left adjustment beam are respectively rotatably connected to the first support column on the same side of the two sets of transverse support units, and the two ends of the right adjustment beam are respectively rotatably connected to the first support column on the other side of the two sets of transverse support units.

[0008] A side positioning plate is fixedly connected to the side of the first connecting beam near the right adjusting beam. The side positioning plate fits against the right adjusting beam in the unfolded state, and the side positioning plate and the right adjusting beam are detachably connected by fasteners.

[0009] By combining the horizontal support unit with the rotatable vertical adjustment unit, the entire support can be folded and unfolded without disassembling the core load-bearing components, significantly reducing the space occupied by the support after folding.

[0010] Furthermore: both ends of the left adjusting beam are fixedly connected to an upper rotating seat and a lower rotating seat, both of which are rotatably connected to the surface of the first support column. The second connecting beam is located between the upper rotating seat and the lower rotating seat. An adjusting groove is provided inside the left adjusting beam, which is used to avoid the first connecting beam and the second connecting beam when the left adjusting beam rotates and folds around the first support column. Both ends of the right adjusting beam are also rotatably connected to the first support column through the upper rotating seat and the lower rotating seat, and the right adjusting beam has an avoidance groove inside that has the same structure as the adjusting groove.

[0011] The design of the upper and lower double rotating seats improves the structural stability of the rotational connection between the left adjusting beam and the first support column, avoiding the problem of easy deformation under stress of a single rotating seat; the adjusting groove inside the left adjusting beam can avoid the connecting beam during folding, avoiding structural interference and ensuring smooth completion of the folding action.

[0012] Furthermore: the side positioning plate has a positioning groove inside, and the right adjusting beam has a matching connecting through hole at the position corresponding to the positioning groove. The fastener is a positioning bolt, which passes through the positioning groove and is threadedly connected to the connecting through hole to lock and fix the right adjusting beam and the side positioning plate.

[0013] By using the positioning groove and the connecting through hole, the right adjustment beam can be precisely aligned after it is unfolded. With the threaded locking of the positioning bolt, the connection strength and load-bearing stability of the bracket after it is unfolded are guaranteed, and the assembly and disassembly can be carried out quickly without welding, which further improves the efficiency of on-site assembly and disassembly.

[0014] Furthermore: a positioning groove is provided on the first connecting beam; an upper steel pipe can be detachably installed on the surface of both the first and second connecting beams; a slot is provided inside the upper steel pipe; the slot is fixed by locking bolts cooperating with the positioning groove; a mounting base is fixedly connected to the side end of the upper steel pipe; a hydraulic jack is detachably connected to the mounting base; and a lifting seat is fixedly connected to the output end of the hydraulic jack.

[0015] The upper steel pipe is detachably connected to the connecting beam via locking bolts, allowing for flexible adjustment of the installation position according to jacking requirements and compatibility with hydraulic jacks of different specifications. The hydraulic jacks are quickly and seamlessly installed on the support via mounting bases, eliminating the need for on-site welding.

[0016] Furthermore, it also includes a steel space frame body, which includes a space frame joint. Multiple steel frames are fixedly connected to the side end of the space frame joint, and the multiple space frame joints and steel frames are spliced ​​together to form an ultra-large area steel space frame.

[0017] The internal thread of the space frame joint is connected to a lifting screw, and an upper welding plate is welded to the top of the lifting screw. A lifting slot seat is fixedly installed on the lower end face of the upper welding plate, and the lifting seat is installed inside the lifting slot seat.

[0018] The lifting components are quickly connected to the steel space frame by the threaded connection between the lifting screw and the space frame joint; the lifting seat and the lifting slot seat of the hydraulic jack adopt a plug-in fit, which can achieve stable vertical transmission of lifting force without welding. The connection and disassembly of the lifting mechanism and the steel space frame only require plugging and unplugging operations, which greatly shortens the preparation and finishing time of the lifting operation, and avoids damage to the steel space frame base material caused by welding.

[0019] Furthermore: a lower fixed seat is threadedly connected to the lifting screw below the space frame joint, and a pad is provided below the space frame joint; the lower fixed seat can be flexibly adjusted in height along the lifting screw, and can also work with the side pad to provide temporary support during the lifting process of the steel space frame, eliminating the need to maintain the lifting mechanism under load throughout the entire process, thus improving the safety of long-stroke lifting operations; during welding and installation, the pad can be used to distribute the vertical load and avoid stress concentration that could damage the space frame joint.

[0020] Furthermore: a support plate is fixedly connected to the top of the first support column, and threaded mounting grooves are provided at the four corners of the support plate. A second support column is connected to the top of the first support column through the threaded mounting grooves of the support plate.

[0021] The top and bottom of the second support column are fixedly connected with support plates with threaded mounting grooves. Multiple second support columns are sequentially threaded together through the support plates to adapt to different lifting height requirements. The splicing structure adopts universal bolt connection, and disassembly and assembly do not require professional welding equipment, which improves the disassembly and assembly efficiency and turnover of the support.

[0022] Furthermore, it also includes a beam-column main body, the top of which is fixedly connected to a top pad block, and the top of the top pad block is welded with a top welding head, which is used to weld and fix to the steel space frame main body after it has been lifted into place; a side pad block for temporarily supporting the steel space frame main body is provided on one side of the beam-column main body.

[0023] Side pads can be flexibly added according to the lifting stroke, and together with the lower fixed bracket, they can provide temporary stable support for the steel space frame, providing safety for the heightening of the support and the next section of lifting operation, and reducing the operational risks of long-stroke lifting of ultra-large area steel space frames.

[0024] Furthermore, the lower ends of the first and second connecting beams are fixedly connected with reinforcing ribs; the reinforcing ribs improve the structural strength and deformation resistance of the connecting beams, prevent the connecting beams from bending and deforming under stress during the jacking process, and ensure the overall load-bearing stability and operational safety of the jacking support.

[0025] The present invention has the following beneficial effects:

[0026] 1. In this invention, the left and right adjusting beams, which are rotatably connected, work in conjunction with two sets of transverse support units to complete the overall folding and unfolding of the bracket without disassembling the core load-bearing components. After folding, the bracket occupies significantly less space, solving the problems of scattered and easily lost parts and large space occupation during transportation and storage of traditional brackets after disassembly. When unfolded, the side positioning plate and the right adjusting beam are precisely fitted and positioned, and the fasteners can be used to quickly complete the locking and fixing without on-site welding operations, reducing the on-site bracket disassembly and assembly process and improving the efficiency of on-site bracket disassembly and assembly.

[0027] 2. In this invention, the lower fixed seat at the bottom of the lifting screw can be adjusted up and down, and the side pads that can be flexibly installed at the main body of the beam and column can quickly achieve temporary stable fixation of the main body of the steel grid after a single lifting stroke, without having to keep the lifting mechanism under load for the whole process, thus reducing the operational risks of long-stroke lifting of ultra-large area steel grids. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of a single lifting support structure;

[0030] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0031] Figure 4 for Figure 1 Enlarged view of point B in the middle;

[0032] Figure 5 This is a schematic diagram of the main structure of the lifting support;

[0033] Figure 6 This is a top view of the folded lifting support.

[0034] Legend:

[0035] 1. Steel space frame main body; 11. Space frame joint; 12. Pad block; 13. Steel frame; 14. Lifting screw; 15. Lower fixed seat; 16. Upper welded plate; 17. Lifting slot seat; 2. Beam and column main body; 21. Side pad block; 22. Top pad block; 23. Top welded head; 3. Lifting support main body; 31. First support column; 311. Second support column; 32. Support plate; 321. Threaded mounting slot; 33. First connecting beam; 331. Positioning slot; 332. Second connecting beam; 333. Reinforcing rib; 334. Side positioning plate; 335. Positioning slot; 34. Right adjusting beam; 35. Left adjusting beam; 351. Adjusting slot; 352. Lower rotating seat; 353. Upper rotating seat; 36. Upper steel pipe; 361. Slot hole; 37. Mounting seat; 38. Hydraulic jack; 39. Lifting seat. Detailed Implementation

[0036] Reference Figure 1-6 The present invention provides a quick-assembly and disassembly jacking device for ultra-large area steel space frame, the core of which includes jacking support body 3, and supporting components including hydraulic jack 38, steel space frame body 1 and beam and column body 2;

[0037] The main beam and column 2 is a permanent support beam and column that has been pre-constructed in the building project. It is the final load-bearing structure for the installation of the main steel space frame 1. The top of the main beam and column 2 is fixedly connected with a top pad 22, and the top of the top pad 22 is welded with a top weld head 23, which is used to weld and fix it to the main steel space frame 1 after it has been lifted into place, so as to achieve the permanent installation of the steel space frame. Side pads 21 can be flexibly installed at preset positions on the inner side of the main beam and column 2 for temporary support of the main steel space frame 1 during the lifting process.

[0038] like Figure 1 and Figure 4 As shown, the main body 1 of the steel space frame is an ultra-large area steel structure to be lifted and installed. It is composed of multiple space frame joints 11 and multiple steel frames 13 welded together. During welding, pads 12 are added to the lower end face of the space frame joints 11 to distribute the vertical load and avoid stress concentration that could damage the space frame joints 11. The center of the space frame joints 11 has an internal threaded through hole for threaded connection of the lifting screw 14. The top of the lifting screw 14 is welded with an upper welding plate 16. The lower end face of the upper welding plate 16 is fixedly installed with a lifting slot seat 17. The interior of the lifting slot seat 17 has a limiting groove that matches the shape of the lifting seat 39 for precise docking with the output end of the hydraulic jack 38 to achieve stable transmission of lifting force. The outer surface of the lifting screw 14, located at the lower end of the space frame joint 11, is threadedly connected to a lower fixed connector 15. The lower fixed connector 15 can be stably mounted on the upper surface of the side pads 21 to provide temporary support for the main body 1 of the steel space frame during the lifting process.

[0039] like Figure 2 and Figure 6As shown, the main body 3 of the lifting support is the core load-bearing structure for the lifting operation. A single lifting support includes two sets of parallel transverse support units and two sets of longitudinal adjustment units for connecting the two sets of transverse support units. Each set of transverse support units includes two parallel vertically arranged first support columns 31. A first connecting beam 33 or a second connecting beam 332 is welded and fixed between the two first support columns 31 to form a stable rectangular support frame. Reinforcing ribs 333 are welded and fixed to the lower ends of the first connecting beam 33 and the second connecting beam 332 to improve the structural strength and deformation resistance of the transverse support unit and ensure the load-bearing stability during the lifting process.

[0040] Two sets of longitudinal adjustment units are respectively set on the left and right sides of the transverse support unit, including a left adjustment beam 35 and a right adjustment beam 34. Both ends of the left adjustment beam 35 are welded and fixed with an upper rotating seat 353 and a lower rotating seat 352. Both the upper rotating seat 353 and the lower rotating seat 352 are rotatably connected to the outer surface of the first support column 31 via bearings. The second connecting beam 332 on the same side is located between the upper rotating seat 353 and the lower rotating seat 352 to avoid structural interference during rotation. The interior of the left adjustment beam 35 has a through-hole adjustment groove 351 along its length. When the left adjustment beam 35 rotates and folds around the first support column 31, the adjustment groove 351 can avoid the first connecting beam 33 and the second connecting beam 332. This ensures smooth completion of the folding action. Both ends of the right adjusting beam 34 are also rotatably connected to the first support column 31 on the other side of the two sets of transverse support units through rotating seats. A side positioning plate 334 is welded and fixed to the side end face of the first connecting beam 33 facing the right adjusting beam 34. The side positioning plate 334 is completely fitted with the side end face of the right adjusting beam 34 in the unfolded state, realizing precise positioning in the unfolded state. A positioning groove 335 is opened inside the side positioning plate 334. A matching connecting through hole is opened at the position of the right adjusting beam 34 corresponding to the positioning groove 335. The positioning bolt passes through the positioning groove 335 and is threadedly locked with the connecting through hole, realizing the detachable fixing of the right adjusting beam 34 and the side positioning plate 334, and completing the unfolding and locking of the bracket.

[0041] like Figure 2 and Figure 5 As shown, a support plate 32 is welded and fixed to the top of the first support column 31. The four corners of the support plate 32 are provided with through threaded mounting grooves 321. The top of the first support column 31 can be connected to the second support column 311 by the support plate 32 and high-strength bolts. The top and bottom of the second support column 311 are both welded and fixed with support plates 32 with threaded mounting grooves 321. Multiple second support columns 311 can be connected to each other by the support plates 32 and bolts in sequence, so as to flexibly adjust the overall height of the lifting support body 3 and adapt to different lifting stroke requirements.

[0042] like Figure 2 and Figure 3As shown, the upper surface of the first connecting beam 33 has multiple sets of parallel positioning grooves 331. The upper surfaces of both the first connecting beam 33 and the second connecting beam 332 can be detachably fitted with upper steel pipes 36. The interior of the upper steel pipe 36 has slots 361 extending along its length. Locking bolts pass through the slots 361 and are threaded into the positioning grooves 331 to achieve quick fixing and position adjustment of the upper steel pipe 36. A mounting base 37 is welded and fixed to the side end of the upper steel pipe 36. The hydraulic jack 38 is detachably fixed to the upper surface of the mounting base 37 by high-strength bolts. The output end of the hydraulic jack 38 is vertically upward, and the end of the output end is fixedly connected to a lifting seat 39. The lifting seat 39 can be inserted and limited in the limiting groove of the lifting slot seat 17 to achieve quick docking of the hydraulic jack 38 and the main body 1 of the steel grid frame.

[0043] To further illustrate the above embodiments, the present invention also provides a method for using a quick-assembly and disassembly lifting device for ultra-large area steel space frames. The specific steps for using this device for steel space frame lifting construction are as follows:

[0044] Step S1: On-site assembly of the support frame: Transport the folded lifting support frame to the pre-set lifting point on the construction site. Rotate the right adjusting beam 34 and the left adjusting beam 35 to fully unfold the support frame, so that the side end face of the right adjusting beam 34 is completely aligned with the side positioning plate 334 on the side end of the first connecting beam 33. Pass the positioning bolts through the positioning groove 335 of the side positioning plate 334 and the connecting through hole of the right adjusting beam 34, and tighten the threads to complete the assembly of a single lifting support frame. Complete the assembly of the support frame at all lifting points in the same way. Multiple lifting support frames are evenly distributed along the lifting points of the steel grid body 1 to ensure uniform lifting force.

[0045] Step S2, support height adjustment: According to the design lifting height and single lifting stroke of the steel grid body 1, on the support plate 32 at the top of the first support column 31, a corresponding number of second support columns 311 are spliced ​​on the support plate 32 through high-strength bolts and threaded mounting grooves 321 to complete the lifting of the support body 3 and adapt to the stroke requirements of a single lifting.

[0046] Step S3, Lifting Mechanism Installation: Place the upper steel pipe 36 against the upper surface of the first connecting beam 33 and the second connecting beam 332. After adjusting it to the preset position, fix the upper steel pipe 36 by passing the locking bolt through the slot 361 and the positioning slot 331. Then fix the hydraulic jack 38 to the mounting base 37 on the side of the upper steel pipe 36 with high-strength bolts to complete the assembly of the lifting mechanism and the main body of the support.

[0047] Step S4, Steel Space Frame Connection Preparation: Install pads 12 at the preset positions of the beam and column main body 2. Weld the space frame joint 11 and the steel frame 13 to the ground to form the steel space frame main body 1. When welding, place pads 12 below the lowest space frame joint 11. Screw the lifting screw 14 into the internal threaded through hole of the space frame joint 11 that needs to be lifted. Weld a welding plate 16 on the top of the lifting screw 14 and fix the lifting groove seat 17 at the lower end of the upper welding plate 16. Adjust the extension length of the lifting screw 14 so that the limiting groove of the lifting groove seat 17 is fully inserted and engaged with the lifting seat 39 at the output end of the hydraulic jack 38 to complete the lifting connection.

[0048] Step S5, Segmented Lifting Operation: Simultaneously start all hydraulic jacks 38 at all lifting points, control the lifting speed of each jack to be consistent, and drive the main body of the steel grid frame 1 to rise steadily and vertically; after a single lifting stroke is completed, install side pads 21 at the corresponding positions of the main beam and column 2, slowly retract part of the hydraulic jacks 38, so that the lower fixed seat 15 under the lifting screw 14 falls steadily on the side pads 21, and complete the temporary fixation of the main body of the steel grid frame 1; then completely depressurize the hydraulic jacks 38, disassemble the lifting mechanism, repeat step S2 to splice and heighten the main body of the support, reinstall the lifting mechanism and complete the docking, and carry out the next segment lifting operation until the main body of the steel grid frame 1 is lifted to the design height;

[0049] Step S6, Finishing Operation: After the main body 1 of the steel space frame is lifted to the design elevation, the edge of the main body 1 of the steel space frame is welded and fixed to the top welding head 23 on the top pad block 22 of the main body 2 of the beam and column, thus completing the permanent installation of the steel space frame; then the lifting mechanism and the main body 3 of the lifting support are disassembled in sequence, the positioning bolts are removed and the support is folded and stored for reuse in the next project.

Claims

1. A quick-assembly and disassembly jacking device for ultra-large area steel space frames, characterized in that: It includes a lifting support body (3), which includes at least two sets of parallel transverse support units and two sets of longitudinal adjustment units; The transverse support unit includes two parallel first support columns (31), a first connecting beam (33), and a second connecting beam (332). The two first support columns (31) are fixedly connected by the first connecting beam (33) or the second connecting beam (332). The longitudinal adjustment unit includes a left adjustment beam (35) and a right adjustment beam (34). The two ends of the left adjustment beam (35) are rotatably connected to the first support column (31) on the same side of the two sets of transverse support units, and the two ends of the right adjustment beam (34) are rotatably connected to the first support column (31) on the other side of the two sets of transverse support units. A side positioning plate (334) is fixedly connected to the side of the first connecting beam (33) near the right adjusting beam (34). The side positioning plate (334) is in contact with the right adjusting beam (34) in the unfolded state, and the side positioning plate (334) and the right adjusting beam (34) are detachably connected by fasteners.

2. The quick-assembly and disassembly lifting device for ultra-large area steel space frames according to claim 1, characterized in that: The left adjusting beam (35) is fixedly connected to an upper rotating seat (353) and a lower rotating seat (352) at both ends. The upper rotating seat (353) and the lower rotating seat (352) are rotatably connected to the surface of the first support column (31). The second connecting beam (332) is located between the upper rotating seat (353) and the lower rotating seat (352). The left adjusting beam (35) has an adjusting groove (351) inside. The adjusting groove (351) is used to avoid the first connecting beam (33) and the second connecting beam (332) when the left adjusting beam (35) rotates and folds around the first support column (31). The right adjusting beam (34) is also rotatably connected to the first support column (31) at both ends through the upper rotating seat (353) and the lower rotating seat (352). The right adjusting beam (34) has an avoidance groove inside that has the same structure as the adjusting groove (351).

3. A quick-assembly and disassembly lifting device for ultra-large area steel space frames according to claim 1, characterized in that: The side positioning plate (334) has a positioning groove (335) inside. The right adjusting beam (34) has a matching connecting through hole at the position corresponding to the positioning groove (335). The fastener is a positioning bolt. The positioning bolt passes through the positioning groove (335) and is threadedly connected to the connecting through hole to realize the locking and fixing of the right adjusting beam (34) and the side positioning plate (334).

4. A quick-assembly and disassembly lifting device for ultra-large area steel space frames according to claim 1, characterized in that: The first connecting beam (33) is provided with a positioning groove (331). The surfaces of the first connecting beam (33) and the second connecting beam (332) are detachably equipped with upper steel pipes (36). The upper steel pipe (36) is provided with a slot (361) inside. The slot (361) is fixed by locking bolts cooperating with the positioning groove (331). The side end of the upper steel pipe (36) is fixedly connected with a mounting base (37). A hydraulic jack (38) is detachably connected to the mounting base (37). The output end of the hydraulic jack (38) is fixedly connected with a lifting seat (39).

5. A quick-assembly and disassembly lifting device for ultra-large area steel space frames according to claim 4, characterized in that: It also includes a steel space frame body (1), the steel space frame body (1) includes a space frame joint (11), and multiple steel frames (13) are fixedly connected to the side end of the space frame joint (11). The multiple space frame joints (11) and steel frames (13) are spliced ​​together to form an ultra-large area steel space frame. The internal thread of the space frame joint (11) is connected to a lifting screw (14), and an upper welding plate (16) is welded to the top of the lifting screw (14). A lifting slot seat (17) is fixedly installed on the lower end face of the upper welding plate (16), and the lifting seat (39) is installed inside the lifting slot seat (17).

6. A quick-assembly and disassembly lifting device for ultra-large area steel space frames according to claim 5, characterized in that: The lifting screw (14) is threaded with a lower fixed seat (15) below the space frame joint (11), and a pad (12) is provided below the space frame joint (11).

7. A quick-assembly and disassembly lifting device for ultra-large area steel space frames according to claim 1, characterized in that: The top of the first support column (31) is fixedly connected to a support plate (32), and the four corners of the support plate (32) are provided with threaded mounting grooves (321). The top of the first support column (31) is connected to a second support column (311) through the threaded mounting grooves (321) of the support plate (32). The top and bottom of the second support column (311) are fixedly connected with a support plate (32) with a threaded mounting groove (321). Multiple second support columns (311) are sequentially threaded together by the support plate (32) to adapt to different lifting height requirements.

8. A quick-assembly and disassembly lifting device for ultra-large area steel space frames according to claim 1, characterized in that: It also includes a beam-column body (2), the top of which is fixedly connected to a top pad (22), and the top of the top pad (22) is welded with a top welding head (23), which is used to weld and fix to the steel grid body (1) after it has been lifted into place; a side pad (21) is provided on one side of the beam-column body (2) for temporarily supporting the steel grid body (1).

9. The quick-assembly and disassembly jacking device for ultra-large area steel space frames according to claim 1, characterized in that: The lower ends of the first connecting beam (33) and the second connecting beam (332) are fixedly connected with reinforcing ribs (333).

10. A method for using a quick-assembly and disassembly jacking device for ultra-large area steel space frames, characterized in that, Includes the following steps: Step S1: Transport the folded lifting bracket to the pre-set lifting point on the construction site, rotate the right adjusting beam (34) and the left adjusting beam (35) to fully unfold the bracket, so that the side end face of the right adjusting beam (34) is fully attached to the side positioning plate (334) of the side end of the first connecting beam (33), pass the positioning bolt through the positioning groove (335) of the side positioning plate (334) and the connecting through hole of the right adjusting beam (34), lock and fix it, and complete the assembly of a single set of lifting brackets. Multiple sets of lifting brackets are evenly distributed along the lifting point of the main body of the steel grid (1). Step S2: According to the design lifting height of the steel grid body (1), on the support plate (32) at the top of the first support column (31), the corresponding number of second support columns (311) are spliced ​​by bolts and threaded mounting grooves (321) to complete the lifting of the support body (3) and adapt to the stroke requirements of a single lifting. Step S3: Place the upper steel pipe (36) on the upper surface of the first connecting beam (33) and the second connecting beam (332), adjust the position, and then fix the upper steel pipe (36) by passing the locking bolt through the slot (361) and the positioning slot (331). Then fix the hydraulic jack (38) on the mounting seat (37) on the side of the upper steel pipe (36) with bolts to complete the assembly of the lifting mechanism and the main body of the support. Step S4: Install pads (12) at the preset position of the beam and column body (2), weld the space frame joint (11) and the steel frame (13) on the ground to form the steel space frame body (1), place the space frame joint (11) of the steel space frame body (1) on the pads (12), screw the lifting screw (14) into the internal thread hole of the space frame joint (11), weld the welding plate (16) on the top of the lifting screw (14), fix the lifting groove seat (17) at the lower end of the welding plate, adjust the extension length of the lifting screw (14) so ​​that the limiting groove of the lifting groove seat (17) is fully engaged with the lifting seat (39) at the output end of the hydraulic jack (38) to complete the lifting docking; Step S5: Simultaneously start the hydraulic jacks (38) at all lifting points to drive the steel grid body (1) to rise steadily and vertically. After a single lifting stroke is completed, install side pads (21) at the corresponding positions of the beam and column body (2), and slowly retract part of the hydraulic jacks (38) so that the lower fixed seat (15) under the lifting screw (14) falls steadily on the side pads (21) to complete the temporary fixation of the steel grid body (1). Then, depressurize the hydraulic jacks (38), disassemble the lifting mechanism, repeat step S2 to splice and raise the support body, reinstall the lifting mechanism and complete the docking, and carry out the next section of lifting operation until the steel grid body (1) is lifted to the design height. Step S6: After the main body (1) of the steel space frame is lifted to the design elevation, the edge of the main body (1) of the steel space frame is welded and fixed to the top welding head (23) on the top pad block (22) of the main body of the beam and column (2), and the installation of the steel space frame is completed. Then, the lifting mechanism and the main body (3) of the lifting support are disassembled in sequence, folded and stored and transferred to the next project for use.

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