Steel structure net rack jacking system

Abstract

The present application belongs to the technical field of steel structure net rack jacking, and particularly relates to a steel structure net rack jacking system, which comprises a jacking support, a jack, a base and a standby lattice column. The jacking support comprises a plurality of used lattice columns sequentially bolted from bottom to top, and the jack is supported at the connection of the two bottommost used lattice columns. The used lattice column comprises three used support columns, and the standby lattice column comprises three standby support columns. The top of the base is fixedly provided with a stabilizing column, and a splicing gap is formed between the stabilizing column and the bottommost used support column. A follow-up support column is telescopically arranged in the stabilizing column. When the top end of the follow-up support column is inserted into the bottom of the standby support column placed in the splicing gap and supports the inner wall of the standby support column in the radial direction, and the top of the standby support column is bolted with the bottommost used support column, the follow-up support column can move upward along with the standby support column. The present application can provide lateral restraint force when the jacking support is lengthened, and can relieve the safety hazards existing in the prior art when the jacking support is lengthened.

Description

Technical Field

[0001] This invention relates to the field of steel structure space frame lifting technology; specifically, this invention relates to a steel structure space frame lifting system. Background Technology

[0002] Steel structure truss jacking refers to an installation method that vertically lifts a large steel structure truss assembled on the ground or a lower platform to the design elevation using a specialized jacking equipment system. Its core concept is: "grounding aerial work and lowering the altitude for high-altitude work." It transfers a large amount of complex and dangerous high-altitude assembly work to a safe and convenient ground location, and finally lifts the entire structure into place.

[0003] A common steel structure space frame jacking system mainly consists of a jacking support and jacks. After the top of the jacking support is connected to the jacking support point of the steel structure space frame, the jacks lift the jacking support to achieve the jacking of the steel structure space frame. However, since the jacks have limited lifting stroke, it is difficult to meet the jacking requirements of large-stroke steel structure space frames. Therefore, a step-by-step climbing method is adopted for jacking operations. During the operation, after each jack completes a jacking stroke, both the steel structure space frame and the jacking support are in a suspended state. At this time, workers need to perform additional work at the bottom of the jacking support to lengthen it and support it with the ground foundation. Then, the jacks are moved back to the lower jacking point to start the next jacking stroke.

[0004] Currently, in the aforementioned step-climbing jacking operation, due to the method of extending the bottom of the jacking support, when the steel structure space frame and the jacking support are in a suspended state, the bottom end of the jacking support is in a suspended state before the extension. The lateral constraint force in this state is weak, and even with the addition of diagonal cables, there are still certain safety hazards. In view of this, in order to further improve the safety of steel structure space frame jacking operations, this application provides a steel structure space frame jacking system. Summary of the Invention

[0005] In view of this, the present invention provides a steel structure space frame lifting system, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0006] To achieve the aforementioned objectives, the present invention provides a steel structure space frame jacking system, including a jacking support, jacks, a base, and spare lattice columns. The jacking support includes a plurality of used lattice columns that are sequentially bolted together from bottom to top by mounting bolts. The jacks are supported at the connection point of the bottom two used lattice columns and are fixedly installed at the center of the base.

[0007] The used lattice columns include three used support columns arranged in an equilateral triangle, and the spare lattice columns include three spare support columns arranged in an equilateral triangle. Adjacent used support columns and adjacent spare support columns are connected by stiffening plates.

[0008] The base is fixedly installed with stabilizing columns located directly below the three used support columns at the bottom of the lifting bracket. A splicing gap is formed between the stabilizing columns and the three used support columns at the bottom. A telescopic lifting support column is installed inside the stabilizing column. When the top of the lifting support column is inserted into the bottom of the spare support column placed in the splicing gap and radially supports the inner wall of the spare support column, and the top of the spare support column is bolted to the bottom used support column, the lifting support column can move upward with the spare support column.

[0009] Preferably, the lifting support includes a first column, with a plurality of outer support blocks evenly spaced along the circumferential direction inside the top of the first column, a rotatable lead screw inside the first column, a lifting sleeve inside the first column, and the sleeve threaded onto the outside of the lead screw, with a top block fixedly installed on the surface of the sleeve to push the outer support blocks outward, and a telescopic column at the bottom of the first column to drive the lead screw to rotate.

[0010] Preferably, the telescopic column includes a second column and a third column. The bottom end of the first column is provided with a column sleeve. The second column is rotatably disposed in the column sleeve. The bottom end of the second column extends from the bottom end of the stabilizing column and is provided with a handle at the bottom end of the second column. The third column is slidably installed in the second column in the height direction, and the bottom end of the lead screw is fixedly connected to the top end of the third column.

[0011] Preferably, the surface of the first column is provided with a stop block that can be raised and lowered, the bottom of the stop block is provided with a spring, and the stop block is located outside the outer support block. The top of the surface of the stabilizing column is provided with a sliding groove, and the bottom of the outer surface of the stop block is fixedly provided with a slider that can support the bottom of the spare support column. The slider slides in cooperation with the sliding groove.

[0012] Preferably, the first column has a lifting groove inside, a guide rod is provided in the lifting groove, the bottom end of the stop block is slidably sleeved on the guide rod, and the spring is sleeved on the outside of the guide rod.

[0013] Preferably, the first column is provided with a telescopic groove, the outer support block is slidably disposed in the telescopic groove, the stop block blocks the outer opening of the telescopic groove, and the stop block is located directly below the outer opening of the telescopic groove when it is lowered to the lowest position.

[0014] Preferably, the bottom of the outer side of the outer support block and the inner side of the top of the stop block are provided with a matching chamfer.

[0015] Preferably, the difference between the splicing gap and the length of the spare support column is less than the length of the mounting bolt. The bottom end of the slider is provided with an elastic telescopic rod, the movable end of the elastic telescopic rod passes through the slider upward, and the movable end of the elastic telescopic rod can be inserted into the bolt hole of the spare support column.

[0016] Preferably, the base includes an upper base plate and a lower base plate, the upper base plate and the lower base plate are fixedly connected, the jack and the stabilizing column are both fixedly installed on the top of the upper base plate, and the bottom end of the second column is rotatably connected to the lower base plate.

[0017] Preferably, a top plate is fixedly installed at the top of the jack, the top plate is provided with a groove for fitting the stiffening plate from bottom to top, and a pressure plate that can press against the top of the stiffening plate is installed on the top plate by bolts.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. By setting up follow-up support columns, the lifting support can be stably supported and limited during the operation of suspending and extending the lifting support, forming a constraint force on the lifting support and improving the stability and safety of the steel structure space frame lifting.

[0020] 2. When the lifting support column is stored inside the stabilizing column, the length of the splicing gap is greater than the length of the spare support column, which facilitates the extension of the lifting support.

[0021] 3. The lifting support column can actively lift the spare support column to be installed, so that the top of the spare support column to be installed abuts against the bottom of the used support column at the bottom of the lifting support, which facilitates the extension of the lifting support.

[0022] 4. During the extension operation of the lifting support, the worker only needs to place the spare support column to be installed on top of the stabilizing column. Then, the first column is inserted into the spare support column to be installed, the spare support column to be installed is lifted to contact the bottom of the used support column at the bottom of the lifting support, and the outer support block pushes outward to support the inner wall of the spare support column to be installed. All these actions can be accomplished by the worker simply rotating the telescopic column. It has the advantages of simple operation and high efficiency. Attached Figure Description

[0023] The disclosure of this invention will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0024] Figure 1This is a schematic diagram of the steel structure space frame lifting system of the present invention when the lifting support is lengthened;

[0025] Figure 2 For the present invention Figure 1 A schematic diagram with the spare support column hidden in the middle;

[0026] Figure 3 For the present invention Figure 1 A structural schematic diagram of the jacking support and spare support column (without visible components).

[0027] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 For the present invention Figure 1 A partial breakdown diagram in the image;

[0029] Figure 6 For the present invention Figure 1 A cross-sectional view of a single stabilizing column;

[0030] Figure 7 For the present invention Figure 6 Enlarged view at point B in the middle;

[0031] Figure 8 This is a schematic diagram showing the insertion of a spare support column at the top of the lifting support column of the present invention until the slider contacts the bottom of the spare support column;

[0032] Figure 9 This is a schematic diagram showing the process when the spare support column is inserted into the top of the lifting support column of the present invention until the stop block is withdrawn from the outside of the outer support block;

[0033] Figure 10 This is a schematic diagram showing the top of the lifting support column of the present invention being radially supported on the inner wall of the spare support column.

[0034] Reference numerals: 1-Lifting bracket; 101-Used support column; 102-Firming plate; 103-Spare support column; 2-Jack; 3-Base; 301-Upper base plate; 302-Lower base plate; 4-Stabilizing column; 5-Splicing gap; 6-First column; 7-Outer support block; 8-Screw rod; 9-Screw sleeve; 10-Top block; 11-Telescopic column; 111-Second column; 112-Third column; 12-Column sleeve; 13-Stop block; 14-Spring; 15-Slide groove; 16-Slider; 17-Lifting groove; 18-Guide rod; 19-Telescopic groove; 20-Mounting bolt; 21-Elastic telescopic rod; 22-Top plate; 23-Sleeve groove; 24-Pressure plate; 25-Bolt; 26-Strip groove; 27-Strip block. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figure 1 As shown, a steel structure grid lifting system includes a lifting support 1, a jack 2, a base 3 and spare lattice columns. The lifting support 1 includes multiple used lattice columns that are bolted together from bottom to top by mounting bolts 20. The jack 2 is supported at the connection of the two bottommost used lattice columns. The jack 2 is fixedly installed at the center of the base 3.

[0037] The used lattice columns include three used support columns 101 arranged in an equilateral triangle, and the spare lattice columns include three spare support columns 103 arranged in an equilateral triangle. Adjacent used support columns 101 and adjacent spare support columns 103 are connected by stiffening plates 102.

[0038] In this embodiment, the spare lattice column and the used lattice column have the same structure and size. The so-called used lattice column can be understood as a lattice column that has been assembled to form the lifting support 1, while the spare lattice column can be understood as a lattice column that has not yet been assembled onto the lifting support 1 at the construction site, but is used as a spare to extend the lifting support 1.

[0039] The stiffening plate 102 connects the three existing support columns 101 within the existing lattice column into a single unit, giving the existing lattice column better stability. Specifically, when installing the stiffening plate 102, the mounting bolts 20 for installing the stiffening plate 102 are passed sequentially through the stiffening plate 102, the bottom bolt holes of the upper existing support column 101, and the top bolt holes of the lower existing support column 101.

[0040] When assembling the spare lattice column and fixing it to the bottom of the lifting support 1, the mounting bolts 20 of the mounting stiffener 102 are passed through the stiffener 102, the bottom bolt holes of the bottom used support column 101, and the top bolt holes of the spare support column 103 in sequence.

[0041] like Figure 1 and Figure 2As shown, the base 3 is fixedly installed with stabilizing columns 4 located directly below the three used support columns 101 at the bottom of the lifting bracket 1. A splicing gap 5 is formed between the stabilizing column 4 and the three used support columns 101 at the bottom. A telescopic lifting support column is provided inside the stabilizing column 4. When the top of the lifting support column is inserted into the bottom of the spare support column 103 placed in the splicing gap 5, it supports the inner wall of the spare support column 103 radially. When the top of the spare support column 103 is bolted to the bottom used support column 101, the lifting support column can move upward with the spare support column 103.

[0042] In this embodiment, the lifting stroke of the jack 2 is set to be the same as the splicing gap 5. When the jack 2 completes one lifting stroke, the lifting support 1 and the steel structure grid are supported by the jack 2 and suspended in the air. The lifting column extends outward from the stabilizing column 4. The lifting column pushes outward against the inner wall of the bottom used support column 101, connecting the stabilizing column 4, the base 3 and the bottom used support column 101, which can improve the stability of the steel structure grid when it is suspended.

[0043] Next, install the spare support columns 103 one by one within the spare lattice columns. First, retract the corresponding following support column into the stabilizing column 4. At this point, the other two following support columns can still maintain the stability of the steel structure grid. Then, place the spare support column 103 on top of the stabilizing column 4, and insert the following support column into the spare support column 103. The following support column then radially supports the inner wall of the spare support column 103. Next, raise the following support column, lifting the spare support column 103 until it contacts the bottom of the lowest used support column 101 of the lifting bracket 1. Then, bolt the spare support column 103 to the lowest used support column 101. At this point, the following support column, stabilizing column 4, base 3, and spare support column 103 are connected, maintaining the stability of the steel structure grid.

[0044] Following the above procedure, the three spare support columns 103 within the spare lattice column are connected to the bottom of the three used support columns 101 at the bottom of the lifting support 1. Then, the stiffening plates 102 are installed, thus achieving the splicing of the spare lattice columns and extending the lifting support 1. After the lifting support 1 is extended, the original spare support columns 103 become the used support columns 101 at the bottom of the extended lifting support 1.

[0045] After the lifting support 1 is lengthened, it is supported by the stabilizing column 4 and the base 3 via the accompanying support column. At this point, the top of the jack 2 is separated from the lifting support 1, and the top of the jack 2 is retracted and connected to the corresponding pre-installed lattice column, allowing for another lifting stroke. This setup enables the lifting operation of the steel structure space frame through a cyclical process of lifting the steel structure space frame – lengthening the lifting support 1 – retracting the jack 2 – and then lifting the steel structure space frame again.

[0046] like Figures 3 to 5 As shown, the lifting support includes a first column 6. Multiple outer support blocks 7 are equidistantly arranged along the circumferential direction inside the top of the first column 6. A rotatable lead screw 8 is arranged inside the first column 6. A lifting sleeve 9 is arranged inside the first column 6, and the sleeve 9 is threaded on the outside of the lead screw 8. A top block 10 that can push the outer support blocks 7 outward is fixedly installed on the surface of the sleeve 9. A telescopic column 11 that can drive the lead screw 8 to rotate is arranged at the bottom of the first column 6.

[0047] In this embodiment, the inner side of the outer support block 7 and the outer side of the top block 10 are provided with inclined surfaces with the bottom ends tilted outwards, so that when the top block 10 moves upward relative to the outer support block 7, the outer support block 7 can be pushed outwards.

[0048] refer to Figure 9 and Figure 10 The first column 6 is moved up into the spare support column 103. The telescopic column 11 is rotated, which drives the lead screw 8 to rotate. The lead screw 8 drives the lead sleeve 9 to move up. The lead sleeve 9 drives the top block 10 to move up. The top block 10 pushes the outer support block 7 outward, so that the outer support block 7 abuts against the inner wall of the spare support column 103, so that the lifting column and the spare support column 103 are in a relatively fixed state.

[0049] After the outer support block 7 abuts against the inner wall of the spare support column 103, the telescopic column 11 continues to rotate. Since the top block 10 can no longer push the outer support block 7 outward, the lifting column will lift the spare support column 103, so that the top of the spare support column 103 contacts the bottom of the used support column 101 at the bottom of the lifting bracket 1. The lifting column can stably support the spare support column 103, thereby facilitating the splicing operation of the spare lattice column.

[0050] like Figures 5 to 7 As shown, the telescopic column 11 includes a second column 111 and a third column 112. The bottom end of the first column 6 is provided with a column sleeve 12. The second column 111 is rotatably disposed in the column sleeve 12. The bottom end of the second column 111 extends from the bottom end of the stabilizing column 4, and the bottom end of the second column 111 is provided with a handle. The third column 112 is slidably installed in the second column 111 in the height direction, and the bottom end of the lead screw 8 is fixedly connected to the top end of the third column 112.

[0051] In this embodiment, the outer diameter of the sleeve 12, the inner diameter of the used support column 101, the inner diameter of the spare support column 103, and the inner diameter of the stabilizing column 4 are the same. A strip groove 26 is provided inside the second column 111, and a strip block 27 is fixedly provided at the bottom of the outer surface of the third column 112, with the strip block 27 slidably disposed within the strip groove 26. Through the cooperation of the strip block 27 and the strip groove 26, the second column 111 and the third column 112 are relatively fixed in the circumferential direction. When the outer support block 7 pushes against the inner wall of the spare support column 103, the threaded sleeve 9 moves upward to the top position of the inner cavity of the first column 6. At this time, the top of the threaded sleeve 9 contacts the top of the inner cavity of the first column 6, and the outer vertical arc surface of the top block 10 is pressed and adhered to the inner vertical arc surface of the outer support block 7. As the supporting column rises along with the backup support column 103, the outer support block 7 abuts against the inner wall of the backup support column 103. Because the outer support block 7 slides radially against the first column 6, while remaining relatively fixed in height, the backup support column 103 can drive the first column 6 upwards via the outer support block 7. At this time, the first column 6 will follow the backup support column 103 upwards. Meanwhile, the inner vertical arc surface of the outer support block 7 adheres to and presses against the outer vertical arc surface of the top block 10. The friction between them causes the top block 10 to move upwards as the outer support block 7 moves upwards. The threaded sleeve 9 and the lead screw 8 will follow the top block 10 upwards. At this time, the third column 112 extends upwards within the second column 111, and the column sleeve 12 moves upwards within the stabilizing column 4.

[0052] like Figures 3 to 7 As shown, the surface of the first column 6 is provided with a stop block 13 that can be raised and lowered. The bottom of the stop block 13 is provided with a spring 14, and the stop block 13 is located outside the outer support block 7. The top of the surface of the stabilizing column 4 is provided with a sliding groove 15. The bottom of the outer surface of the stop block 13 is fixedly provided with a slider 16 that can support the bottom of the spare support column 103. The slider 16 slides in cooperation with the sliding groove 15.

[0053] refer to Figures 7 to 9 In this embodiment, the spring 14 supports the stop block 13 at its highest position. At this time, the stop block 13 is located outside the outer support block 7, preventing the outer support block 7 from extending. Meanwhile, as the telescopic column 11 rotates, causing the top of the first column 6 to extend from the stabilizing column 4 and insert into the backup support column 103, the slider 16 slides within the groove 15 until the top of the slider 16 contacts the bottom of the backup support column 103. As the first column 6 continues to move upward, the slider 16 is blocked by the backup support column 103 and cannot move upward. During this process, the stop block 13 moves downward relative to the first column 6.

[0054] In this embodiment, the insertion of the first column 6 into the interior of the spare support column 103, the lifting of the first column 6 onto the spare support column 103, and the formation of a relatively fixed state between the first column 6 and the spare support column 103 can all be achieved by rotating the telescopic column 11. Furthermore, through the self-locking function between the lead screw 8 and the lead sleeve 9, the column can be stabilized in the aforementioned state after operation.

[0055] like Figure 5 and Figure 7 As shown, the first column 6 has a lifting groove 17 inside, and a guide rod 18 is installed inside the lifting groove 17. The bottom end of the stop block 13 is slidably sleeved on the outside of the guide rod 18, and the spring 14 is sleeved on the outside of the guide rod 18. The first column 6 has a telescopic groove 19 inside, and the outer support block 7 is slidably installed inside the telescopic groove 19. The stop block 13 blocks the outer opening of the telescopic groove 19, and when the stop block 13 is lowered to its lowest position, it is located directly below the outer opening of the telescopic groove 19. The outer opening of the lifting groove 17 and the outer opening of the telescopic groove 19 are in communication. (Reference) Figure 9 and Figure 10 When the outer support block 7 moves upward to a height greater than the stop block 13, the stop block 13 is withdrawn from the outside of the outer support block 7, and the bottom of the stop block 13 contacts the inner bottom wall of the lifting groove 17, so that the first column 6 cannot continue to move upward. Thus, during the subsequent rotation of the telescopic column 11, the threaded sleeve 9 will move upward outside the threaded rod 8, and the top block 10 will push the outer support block 7 radially out and support it on the inner wall of the spare support column 103.

[0056] like Figure 5 and Figure 7 As shown, the bottom of the outer side of the outer support block 7 and the inner side of the top of the stop block 13 are provided with a matching chamfer. Specifically, when the first column 6 moves downward relative to the slider 16, the stop block 13 can push the outer support block 7 inward as it passes the stop block 13 from top to bottom, so that the outer support block 7 returns to its original position inward.

[0057] like Figure 1 As shown, the difference in length between the splicing gap 5 and the spare support column 103 is less than the length of the mounting bolt 20. An elastic telescopic rod 21 is provided at the bottom of the slider 16. The movable end of the elastic telescopic rod 21 passes through the slider 16 upwards, and the movable end of the elastic telescopic rod 21 can be inserted into the bolt hole of the spare support column 103.

[0058] When extending the lifting bracket 1, align the bottom bolt hole of the spare support column 103 with the top of the movable end of the elastic telescopic rod 21 and then put the movable end of the elastic telescopic rod 21 on. Then, pass the mounting bolts 20 downwards through the bottom bolt holes of the used support column 101 and the top bolt holes of the spare support column 103 in sequence. At this time, the lifting bracket 1 can keep the supporting column fixed in the circumferential direction through the spare support column 103, thereby providing a circumferential constraint force for the supporting column and preventing the supporting column from rotating the spare support column 103 when the telescopic column 11 rotates. This can maximize the external support force of the outer support block 7 on the spare support column 103.

[0059] like Figures 1 to 3 As shown, the base 3 includes an upper base plate 301 and a lower base plate 302, which are fixedly connected. The jack 2 and the stabilizing column 4 are both fixedly installed on the top of the upper base plate 301, and the bottom end of the second column 111 is rotatably connected to the lower base plate 302. The gap between the upper base plate 301 and the lower base plate 302 provides space for the worker to operate the handle.

[0060] like Figure 3 As shown, a top plate 22 is fixedly installed at the top of the jack 2. The top plate 22 has a groove 23 that allows the stiffening plate 102 to be fitted from bottom to top. A pressure plate 24 that can be pressed against the top of the stiffening plate 102 is installed on the top plate 22 by bolts 25. The bolts 25 and the pressure plate 24 are rotatably connected, and the bolts 25 and the top plate 22 are threaded together. By rotating the bolts 25 outward, the bolts 25 drive the pressure plate 24 to move outward, allowing the pressure plate 24 to be removed from above the stiffening plate 102. Then, the jack 2 can be retracted, lowering the top plate 22 to the next lifting starting point.

[0061] After completing one lifting stroke, reverse the handle. The handle drives the second column 111 to rotate. The second column 111 drives the lead screw 8 to reverse through the third column 112. At this time, the first column 6 will be pulled out from the bottom of the used support column 101 of the lifting bracket 1, and the third column 112 will automatically fall up and down under the action of gravity. As the outer support block 7 passes the stop block 13 from top to bottom, it can be pushed back into the first column 6 by the stop block 13. In this way, the first column 6 can be stored in the stabilizing column 4.

[0062] The technical scope of this invention is not limited to the contents of the above specification. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the scope of this invention.

Claims

1. A steel structure space frame jacking system, characterized in that, It includes a lifting support (1), a jack (2), a base (3) and a spare lattice column. The lifting support (1) includes multiple used lattice columns that are bolted together from bottom to top by mounting bolts (20). The jack (2) is supported at the connection of the two used lattice columns at the bottom. The jack (2) is fixedly installed at the center of the base (3). The used lattice columns include three used support columns (101) arranged in an equilateral triangle, and the spare lattice columns include three spare support columns (103) arranged in an equilateral triangle. Adjacent used support columns (101) and adjacent spare support columns (103) are connected by stiffening plates (102). The base (3) is fixedly installed with stabilizing columns (4) located directly below the three used support columns (101) at the bottom of the lifting bracket (1). A splicing gap (5) is formed between the stabilizing column (4) and the three used support columns (101) at the bottom. A telescopic lifting support column is provided inside the stabilizing column (4). When the top of the lifting support column is inserted into the bottom of the spare support column (103) placed in the splicing gap (5), it radially supports the inner wall of the spare support column (103). When the top of the spare support column (103) is bolted to the bottom used support column (101), the lifting support column can move upward with the spare support column (103).

2. The steel structure space frame jacking system as described in claim 1, characterized in that, The lifting support includes a first column (6), with multiple outer support blocks (7) evenly spaced along the circumferential direction inside the top of the first column (6), a rotatable lead screw (8) inside the first column (6), a lifting sleeve (9) inside the first column (6), and the sleeve (9) threaded around the lead screw (8), with a top block (10) fixedly installed on the surface of the sleeve (9) to push the outer support block (7) outward, and a telescopic column (11) at the bottom of the first column (6) to drive the lead screw (8) to rotate.

3. The steel structure space frame jacking system as described in claim 2, characterized in that, The telescopic column (11) includes a second column (111) and a third column (112). The bottom end of the first column (6) is provided with a column sleeve (12). The second column (111) is rotatably disposed in the column sleeve (12). The bottom end of the second column (111) extends out from the bottom end of the stabilizing column (4). The bottom end of the second column (111) is provided with a handle. The third column (112) is slidably installed in the second column (111) in the height direction. The bottom end of the lead screw (8) is fixedly connected to the top end of the third column (112).

4. A steel structure space frame jacking system as described in claim 2, characterized in that, The surface of the first column (6) is provided with a stop block (13) that can be raised and lowered. The bottom of the stop block (13) is provided with a spring (14), and the stop block (13) is located outside the outer support block (7). The top of the surface of the stabilizing column (4) is provided with a sliding groove (15). The bottom of the outer surface of the stop block (13) is fixedly provided with a slider (16) that can support the bottom of the spare support column (103). The slider (16) slides in cooperation with the sliding groove (15).

5. A steel structure space frame jacking system as described in claim 4, characterized in that, The first column (6) has a lifting groove (17) inside, and a guide rod (18) is provided inside the lifting groove (17). The bottom end of the stop block (13) is slidably sleeved on the guide rod (18), and the spring (14) is sleeved on the outside of the guide rod (18).

6. A steel structure space frame jacking system as described in claim 4, characterized in that, The first column (6) is provided with a telescopic groove (19), the outer support block (7) is slidably disposed in the telescopic groove (19), the stop block (13) blocks the outer groove of the telescopic groove (19), and the stop block (13) is located directly below the outer groove of the telescopic groove (19) when it is lowered to the lowest position.

7. A steel structure space frame jacking system as described in claim 4, characterized in that, The bottom of the outer side of the outer support block (7) and the inner side of the top of the stop block (13) are provided with a matching chamfer.

8. A steel structure space frame jacking system as described in claim 4, characterized in that, The difference between the length of the splicing gap (5) and the length of the spare support column (103) is less than the length of the mounting bolt (20). The bottom end of the slider (16) is provided with an elastic telescopic rod (21). The movable end of the elastic telescopic rod (21) passes through the slider (16) upward, and the movable end of the elastic telescopic rod (21) can be inserted into the bolt hole of the spare support column (103).

9. A steel structure space frame jacking system as described in claim 3, characterized in that, The base (3) includes an upper base plate (301) and a lower base plate (302). The upper base plate (301) and the lower base plate (302) are fixedly connected. The jack (2) and the stabilizing column (4) are both fixedly installed on the top of the upper base plate (301). The bottom end of the second column (111) is rotatably connected to the lower base plate (302).

10. A steel structure space frame jacking system as described in claim 1, characterized in that, The top of the jack (2) is fixedly installed with a top plate (22), and the top plate (22) is provided with a groove (23) that can fit the stiffener (102) from bottom to top. A pressure plate (24) that can press against the top of the stiffener (102) is installed on the top plate (22) by bolts (25).

Images