Steel net rack jacking device

Abstract

The utility model discloses a steel net rack jacking device. A standard segment; the supporting frame comprises an upper support and a lower support, the lower support can be placed in the standard section in a matched mode, the upper support comprises two positioning rods and a jacking cap, the two positioning rods are arranged in parallel, the jacking cap is connected between the middle portions of the positioning rods, and the bottoms of the two ends of the positioning rods are connected with upper support positioning blocks extending downwards; the distance between the upper supporting and positioning blocks can be matched and clamped into the section transverse links on the left side and the right side of the standard section; the bottom of the jacking jack is fixed by the lower support, and the top of the jacking jack is connected with the jacking cap; the two supporting cross beams are arranged, the length of each supporting cross beam is larger than the distance between the section transverse links on the left side and the right side of the corresponding standard section, and the supporting cross beams can be inserted into the space between the section transverse links on the left side and the right side of the adjacent standard sections in a matched mode. According to the utility model, the left and right positions of the support frame can be quickly positioned, and the upper support is connected with the lower chord steel ball or the upper chord steel ball, so that the left and right positioning of the lower chord steel ball or the upper chord steel ball in the standard section can be accelerated, and the steel net rack is helped to realize vertical upward jacking.

Description

Technical Field

[0001] This utility model relates to the field of space frame construction technology, and in particular to a steel space frame lifting device. Background Technology

[0002] Steel space frame structures have advantages such as light weight, large span, good seismic performance, and fast construction speed, making them suitable for large-span, high-rise, and heavy-load structures.

[0003] There are several methods for installing steel space frame structures, including high-altitude assembly, hoisting, and jacking. The high-altitude assembly method involves hoisting small components or units of the space frame to the designed position for assembly. The hoisting method involves first assembling the space frame as a whole on the ground, and then using cranes to lift it to the designed position. Both methods involve high-altitude operations and are quite difficult. The jacking method, however, is a more effective method for space frame installation due to its low cost, minimal impact from site conditions, and ease of operation. This method requires the use of a jacking device. The specific procedure involves using the jacking device to lift the space frame to the height of a standard section, then manually installing the extended standard sections. After installation, the jacking continues until the space frame reaches the designed height. During this process, the position of the jacking device is crucial in ensuring the space frame remains vertically aligned with the ground and reaches the designed position. Currently, there is no steel space frame jacking device that can quickly solve this problem. Utility Model Content

[0004] To address the aforementioned problems, this utility model discloses a steel space frame lifting device.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A steel space frame lifting device, comprising:

[0007] A standard segment includes segment columns and segment transverse connections. Four segment columns are provided and connected by the segment transverse connections to form a cube. Connecting flanges are fixed at the top and bottom. Each side of the cube has at least two segment transverse connections.

[0008] The support frame includes an upper support and a lower support. The lower support can be fitted into the internal space enclosed by the segmental columns and the segmental transverse connections. The upper support includes positioning rods and lifting caps. Two positioning rods are arranged in parallel and connected to the lifting cap in the middle. The bottom ends of both ends are connected to downward-extending upper support positioning blocks. The distance between the upper support positioning blocks can be fitted into the segmental transverse connections on the left and right sides of the standard segment. The lifting cap can be fitted to connect the upper chord steel ball or upper chord steel ball of the steel space frame.

[0009] The lifting jack is fixed at the bottom by the lower support and connected to the lifting cap at the top. The lifting height is greater than the height of the standard section.

[0010] The support beam consists of two beams, each longer than the distance between the horizontal connections of the left and right sides of the standard segment, and capable of being inserted into the space between the horizontal connections of the left and right sides of adjacent standard segments.

[0011] Preferably, the uppermost segments on both sides of the standard segment are provided with first marking lines, which can match and mark the front and rear positions of the positioning rod.

[0012] Preferably, the bottom surfaces of both ends of the supporting beam are respectively connected to symmetrically arranged lower beam positioning blocks extending downwards, and the top surface is connected to two symmetrically arranged upper beam positioning blocks extending upwards. The distance between the lower beam positioning blocks can be matched to fit into the transverse connections on the left and right sides of the standard segment, and the distance between the upper beam positioning blocks can be matched to fit into the lower support.

[0013] Preferably, the positioning block on the crossbeam is right-angled.

[0014] Preferably, the uppermost segments on both sides of the standard segment are provided with second identification lines, which can match and identify the front and rear positions of the support beam.

[0015] Preferably, the lower support includes a lower support base, a lower support positioning seat, and a first lower support diagonal connecting rod. The lower support positioning seat is a square frame structure with positioning seat support parts at the front and rear that can be supported by the support beam. The lower support base is a square frame structure with diagonal connecting rods at the diagonals. The front and rear of the lower support base and the lower support positioning seat are respectively connected by two symmetrically arranged first lower support diagonal connecting rods.

[0016] Preferably, the lower support further includes two symmetrically arranged second lower support inclined connecting rods, which are disposed inside the two first lower support inclined connecting rods and form a triangle with one of the first lower support inclined connecting rods and the lower support positioning seat, respectively.

[0017] Preferably, the upper support further includes an upper support reinforcing frame and a first upper support diagonal connecting rod. The upper support reinforcing frame is located below the lifting cap and has a square frame structure. The front and rear are respectively connected to the positioning rod by two symmetrically arranged first upper support diagonal connecting rods. The first upper support diagonal connecting rods are arranged diagonally outward from bottom to top. Both the upper support reinforcing frame and the first upper support diagonal connecting rods can be matched and placed into the internal space enclosed by the segment column and the segment transverse connecting rod.

[0018] Preferably, the upper support further includes two symmetrically arranged second upper support diagonal connecting rods, which are disposed inside the two first upper support diagonal connecting rods and form a triangle with one of the first upper support diagonal connecting rods and the positioning rod, respectively.

[0019] The steel grid lifting device described above, during initial installation, involves quickly connecting two standard segments together using connecting flanges and bolt assemblies. The bottom of the lifting jack's cylinder is fixed by a lower support, and the top of the lifting jack's piston is connected to the bottom of the lifting cap. The lower support in the support frame is placed within the internal space enclosed by the segment columns and segment transverse connections. Positioning rods are placed on the uppermost segment transverse connections on both sides of the top standard segment. The upper support positioning blocks at both ends are respectively matched and affixed to the outer surfaces of the two segment transverse connections, completing the left-right positioning of the upper supports. The front-back position of the upper supports is adjusted, and two support beams are respectively erected on the uppermost segment transverse connections on both sides of the bottom standard segment. The upper part symmetrically supports the lower support, thus providing a reaction force for the lifting jack. After installation, the lower or upper chord steel ball is welded to the lifting cap, and the jack is lifted to the design height. Then, the third standard segment is installed between the positioning rod and the already installed standard segment. The position of the upper support is adjusted in conjunction with the upper support positioning block. After adjustment, the two support beams are pulled out, the lifting jack is retracted to the design position, and then the two support beams are respectively placed on the upper horizontal connection of the second standard segment from the top. The lifting jack and standard segment installation steps are repeated until the steel grid frame reaches the design position.

[0020] This utility model has the following advantages:

[0021] (1) The present invention is designed with an upper support positioning block. The upper support positioning block can quickly position the left and right positions of the support frame. The upper support is connected to the lower chord steel ball or the upper chord steel ball, which can accelerate the left and right positioning of the lower chord steel ball or the upper chord steel ball in the standard segment and help the steel grid frame to be lifted vertically upward.

[0022] (2) The present invention further matches the design of the first marking line, which can help to quickly determine the front and rear positions of the upper support. Combined with the upper support positioning block, it can ensure that before each lower chord steel ball or upper chord steel ball is lifted, the trajectory of the lower chord steel ball or upper chord steel ball is a straight line perpendicular to the ground.

[0023] (3) The present invention further designs an upper positioning block, a lower positioning block and a second marking line on the crossbeam, so that the lifting jack can maintain vertical upward lifting, thereby maintaining the balance of the entire steel grid lifting device during the working process and improving the safety of construction. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the main view structure of a standard segment.

[0025] Figure 2 yes Figure 1 A schematic diagram of the right-side structure.

[0026] Figure 3 This is a schematic diagram of the main structure of the support frame and the lifting jack.

[0027] Figure 4 This is a schematic diagram of the main structure of the support frame, support beam, and lifting jack.

[0028] Figure 5 yes Figure 4 A schematic diagram of the right-side structure.

[0029] Figure 6 This is a schematic diagram of the main structure of this utility model in use (with the lifting jack not lifted).

[0030] Figure 7 yes Figure 6 A schematic diagram of the right-side structure.

[0031] Figure 8 This is a schematic diagram of the main structure of this utility model in use (lifting jack in lifting state).

[0032] Figure 9 yes Figure 8 A schematic diagram of the right-side structure.

[0033] In the diagram, the standard segment is 100, the connecting flange is 110, the segment column is 120, the segment diagonal brace is 130, the segment horizontal connector is 140, the support frame is 200, the upper support is 210, the lifting cap is 211, the positioning rod is 212, the upper support positioning block is 213, the first upper support diagonal connector is 214, the second upper support diagonal connector is 215, the upper support reinforcing frame is 216, the lower support is 220, the lower support positioning seat is 221, the first lower support diagonal connector is 222, the second lower support diagonal connector is 223, the lower support base is 224, the lower chord steel ball is 300, the lifting jack is 400, and the support beam is 500. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0035] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] A steel space frame lifting device, combined with Figure 1-9 As shown, it includes a standard segment 100, a support frame 200, a lifting jack 400, and a support beam 500, wherein: the standard segment 100, combined with... Figure 1 and Figure 2As shown, it includes segmental columns 120 and segmental transverse connectors 140. There are four segmental columns 120 connected by segmental transverse connectors 140 to form a cube. Connecting flanges 110 are fixed at the top and bottom. Each side of the cube has at least two segmental transverse connectors 140. Of course, the segmental transverse connectors 140 at the top maintain an appropriate distance from the top of the segmental columns 120, and the segmental transverse connectors 140 at the bottom maintain an appropriate distance from the bottom of the segmental columns 120. In each frame formed by the segmental columns 120 and segmental transverse connectors 140, at least one segmental diagonal brace 130 can be set as needed. The segmental diagonal brace 130 divides the frame into at least two triangles to ensure the support strength of the standard segment 100. The support frame 200 includes an upper support 210 and a lower support 220. The lower support 220 can be fitted into the internal space enclosed by the segmental columns 120 and the segmental transverse connectors 140, i.e., a cubic internal space. The upper support 210 includes positioning rods 212 and lifting caps 211. Two positioning rods 212 are arranged in parallel, connected in the middle by the lifting cap 211, and both ends are connected to downward-extending upper support positioning blocks 213. The distance between the upper support positioning blocks 213 can be fitted into the segmental transverse connectors 140 on the left and right sides of the standard segment 100. The lifting caps 211 can be fitted to the lower chord steel balls 300 or upper chord steel balls of the steel space frame, and are connected by the upper support positioning blocks. 213 can quickly position the left and right sides of the support frame 200, while the upper support 210 is connected to the lower chord steel ball 300 or the upper chord steel ball, thereby accelerating the left and right positioning of the lower chord steel ball 300 or the upper chord steel ball in the standard segment 100, helping the steel grid frame to achieve vertical upward lifting; the lifting jack 400 is fixed at the bottom by the lower support 220 and connected to the lifting cap 211 at the top, with a lifting height greater than the height of the standard segment 100; the support beam 500 is provided with two beams, the length of which is greater than the distance between the segmental horizontal connections 140 on the left and right sides of the standard segment 100, and can be matched and inserted into the space between the segmental horizontal connections 140 on the left and right sides of the adjacent standard segment 100.

[0038] Preferably, to more quickly position the lower chord steel ball 300 or the upper chord steel ball, the uppermost segment horizontal connector 140 on both sides of the standard segment 100 is provided with a first marking line. The first marking line can match the front and back position of the marking positioning rod 212. By determining the front and back position of the positioning rod 212, the front and back position of the lower chord steel ball 300 or the upper chord steel ball can be determined. With the support positioning block 213, while ensuring the accurate installation and positioning of the standard segment 100, it can be ensured that before each lifting of the lower chord steel ball 300 or the upper chord steel ball, the trajectory of the lower chord steel ball 300 or the upper chord steel ball is a straight line perpendicular to the ground.

[0039] When using, combine Figure 6-7 As shown (for easy viewing), Figure 7(The segmental bracing 130 of the top standard segment is omitted from the drawing). During initial installation, the two standard segments 100 are quickly connected together via connecting flange 110 and bolt assembly. The lower support 220 fixes the bottom of the cylinder of the lifting jack 400. The top of the piston of the lifting jack 400 is connected to the bottom surface of the lifting cap 211. The lower support 220 in the support frame 200 is placed in the internal space enclosed by the segmental column 120 and the segmental transverse connector 140. The positioning rod 212 is placed on the topmost segmental transverse connector 140 on both sides of the top standard segment 100. The upper support positioning blocks 213 are respectively matched and attached to the outer sides of the two segmental transverse connectors 140 to complete the left and right positioning of the upper support 210. At the same time, combined with the first marking line, the front and rear positioning of the upper support 210 can be achieved. The two support beams 500 are respectively mounted on the upper segmental transverse connectors 140 on the left and right sides of the bottom standard segment 100, and symmetrically support the lower support 220. This can provide reaction force for the lifting jack 400 to lift. After installation, the lower chord steel ball 300 or the upper chord steel ball is welded to the lifting cap 211 and lifted upward to the design height. At this time, if Figure 8-9 As shown (for easy viewing), Figure 7 (The diagonal bracing 130 of the standard segment at the top is omitted from the drawing.) The upper support 210 is also lifted upward to a certain height, maintaining a certain distance from the installed standard segment 100. The third standard segment 100 is installed between the positioning rod 212 and the installed standard segment 100. The position of the upper support 210 is adjusted by the upper support positioning block 213 and the first marking line. After the adjustment is completed, the two support beams 500 are pulled out, and the lifting jack 400 is retracted to the design position. Then, the two support beams 500 are respectively erected on the upper segment horizontal connectors 140 on the left and right sides of the second standard segment 100 from the top. The above steps of lifting with the lifting jack 400 and installing the standard segment 100 are repeated until the steel grid reaches the design position.

[0040] In addition, considering that the segmental transverse connections 140 on the left and right sides of the standard segment 100 need to bear the load transmitted by the supporting beam 500, and bear a greater force than the segmental transverse connections 140 on the front and rear sides of the standard segment 100, in this embodiment, only one segmental diagonal brace 130 is designed for the two square frames formed by the segmental column 120 and the segmental transverse connection 140 in front and behind, connected at the opposite corner of the square frame, while four segmental diagonal braces 130 are designed for the two square frames formed by the segmental column 120 and the segmental transverse connection 140 on the left and right sides. The segmental diagonal braces 130 are in the shape of an inverted W, dividing the square frame into five small triangles to enhance its compressive strength.

[0041] Preferably, considering the need to keep the lifting jack 400 vertically upward to better maintain the balance of the entire steel grid lifting device during the working process, this embodiment further considers the need for rapid adjustment of the lower support 220 during construction. The bottom surfaces of both ends of the support beam 500 are respectively connected to symmetrically arranged lower beam positioning blocks extending downward, and the top surface is connected to two symmetrically arranged upper beam positioning blocks extending upward. The distance between the lower beam positioning blocks can match the segmental transverse connections 140 on both sides of the standard segment 100, and the distance between the upper beam positioning blocks can match the lower support 220. Of course, it's easy to understand that both the upper and lower positioning blocks on the crossbeam are symmetrical about the centerline of the supporting crossbeam 500 along its length. The height difference between the top of the upper positioning block and the bottom of the lower positioning block must be less than the minimum distance between the horizontal connecting segments 140 on the left and right sides of the adjacent standard segment 100. Referring to the above description of the left and right positioning of the positioning rod 212, the lower positioning block is attached to the outer side of the two horizontal connecting segments 140, allowing the left and right positions of the supporting crossbeam 500 to be quickly determined. Additionally, a second marking line can be set on the uppermost horizontal connecting segments 140 on both sides of the standard segment 100. This second marking line can be matched to mark the front and rear positions of the supporting crossbeam 500, thus enabling the rapid determination of its front and rear positions. This structure helps the lifting jack 400 maintain vertical upward lifting, improving the safety of the construction process. If upper and lower positioning blocks are installed on the crossbeam, when placing the support crossbeam 500, the lifting jack 400 needs to be slightly retracted upwards by a certain distance. After adjusting the support crossbeam 500, the lifting jack 400 should be slightly extended and the lower support 220 should be inserted between the upper positioning blocks on the crossbeam.

[0042] Preferably, the positioning blocks on the crossbeam are right-angled and can be made of angle steel. This allows the four corners of the lower support 220 to be secured between the four positioning blocks on the crossbeam, enabling the lower support 220 to be quickly positioned around the crossbeam and in front of and behind it.

[0043] Preferably, this embodiment provides a specific lower support 220, combined with... Figure 3-5 As shown, the lower support 220 includes a lower support base 224, a lower support positioning seat 221, and a first lower support inclined connecting rod 222. The lower support positioning seat 221 is a square frame structure, with support beams 500 at the front and rear that correspond to the support parts of the positioning seat. Figure 5As shown, the support beam 500 supports the positioning seat support, providing a reaction force for the lower support 220. The lower support base 224 is a square frame structure with diagonally connected diagonal braces. The intersection of the diagonal braces supports the cylinder of the lifting jack 400, ensuring the stability of the support. The front and rear of the lower support base 224 and the lower support positioning seat 221 are connected by two symmetrically arranged first lower support diagonal connecting rods 222. That is, the first lower support diagonal connecting rods 222 connect the lower support base 224 and the lower support positioning seat 221 into a whole. The first lower support diagonal connecting rods 222 are symmetrical with respect to the center line of the lower support base 224 and the lower support positioning seat 221. In addition, to facilitate the placement of the lower support 220, the area of ​​the lower support base 224 is generally smaller than the area of ​​the lower support positioning seat 221. Depending on the actual situation, a front-to-back reinforcing rod can also be set inside the lower support positioning seat 221 and connected to it to prevent deformation of the lower support positioning seat 221.

[0044] Preferably, this embodiment also provides a structure to further reinforce the lower support 220. The lower support 220 further includes two symmetrically arranged second lower support inclined connecting rods 223, which are also symmetrical with respect to the center lines of the lower support base 224 and the lower support positioning seat 221. The second lower support inclined connecting rods 223 are arranged inside the two first lower support inclined connecting rods 222, forming a triangle with one of the first lower support inclined connecting rods 222 and the lower support positioning seat 221 respectively. In this embodiment, the bottom end of the second lower support inclined connecting rod 223 is connected to the bottom end of the first lower support inclined connecting rod 222, and the top end of the second lower support inclined connecting rod 223 and the top end of the first lower support inclined connecting rod 222 are kept at a certain distance and are both connected to the lower support positioning seat 221.

[0045] Preferably, this embodiment provides a specific upper support 210, combined with... Figure 3-5 As shown, the upper support 210 also includes an upper support reinforcing frame 216 and a first upper support diagonal connecting rod 214. The upper support reinforcing frame 216 is located below the lifting cap 211 and has a square frame structure. The front and rear are respectively connected to the positioning rod 212 by two symmetrically arranged first upper support diagonal connecting rods 214. The first upper support diagonal connecting rods 214 are symmetrical with respect to the center line of the positioning rod 212. Since the positioning rod 212 is relatively long, in order to reduce the possibility of its deformation, the first upper support diagonal connecting rods 214 are arranged diagonally outward from bottom to top. Both the upper support reinforcing frame 216 and the first upper support diagonal connecting rods 214 can be matched and placed into the internal space enclosed by the segment column 120 and the segment transverse connecting rod 140.

[0046] Preferably, this embodiment also provides a structure to further reinforce the upper support 210. The upper support 210 further includes two symmetrically arranged second upper support inclined connecting rods 215, which are symmetrical about the center line of the positioning rod 212. The second upper support inclined connecting rods 215 are arranged inside the two first upper support inclined connecting rods 214, forming a triangle with one of the first upper support inclined connecting rods 214 and the positioning rod 212 respectively. In this embodiment, the bottom end of the first upper support inclined connecting rod 214 is connected to the bottom end of the second upper support inclined connecting rod 215, and the top end of the first upper support inclined connecting rod 214 and the top end of the second upper support inclined connecting rod 215 are kept at a certain distance and are both connected to the positioning rod 212.

[0047] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A steel space truss jacking device, characterized by It comprises: standard segments, which include segment columns, segment cross connections, the segment columns are provided with four, connected to form a cube type through the segment cross connections, the top and bottom are fixed with connecting flanges, each side of the cube type has at least two segment cross connections; support frame, which includes upper support and lower support, the lower support can be matched into the internal space surrounded by the segment columns and the segment cross connections, the upper support includes positioning rods, which are provided with two in parallel, the middle part is connected with the jacking cap, the two ends are connected with downward extending upper support positioning blocks, the distance between the upper support positioning blocks can be matched into the segment cross connections on the left and right sides of the standard segment, the jacking cap can be matched with the upper chord steel ball or the upper chord steel ball of the steel net rack; jacking jack, the bottom is fixed by the lower support, the top is connected with the jacking cap, the jacking height is greater than the height of the standard segment; support beam, which is provided with two, the length is greater than the distance between the segment cross connections on the left and right sides of the standard segment, and can be matched into the space between the segment cross connections on the left and right sides of the adjacent standard segment.

2. The steel net rack jacking device according to claim 1, wherein: the segment cross connections on the left and right sides of the uppermost standard segment are provided with first identification lines, which can match the front and rear positions of the positioning rods.

3. The steel net rack jacking device according to claim 1, wherein: the support beam is connected with downward extending symmetrically arranged beam lower positioning blocks at the bottom of the two ends, and is connected with two symmetrically arranged upward extending beam upper positioning blocks at the top, the distance between the beam lower positioning blocks can be matched into the segment cross connections on the left and right sides of the standard segment, and the distance between the beam upper positioning blocks can be matched into the lower support.

4. The steel net rack jacking device according to claim 1, wherein: the beam upper positioning blocks are in right angle shape.

5. The steel net rack jacking device according to claim 3 or 4, wherein: the segment cross connections on the left and right sides of the uppermost standard segment are provided with second identification lines, which can match the front and rear positions of the support beam.

6. The steel net rack jacking device according to claim 1, wherein: the lower support includes a lower support base, a lower support positioning seat and a first lower support inclined connection rod, the lower support positioning seat is a square frame structure, the front and rear parts are provided with positioning seat support parts corresponding to the support of the support beam, the lower support base is a square frame structure connected with inclined rods at the opposite angles, and the front and rear parts of the lower support base and the lower support positioning seat are connected through two symmetrically arranged first lower support inclined connection rods.

7. The steel net rack jacking device according to claim 1, wherein: the lower support further includes two symmetrically arranged second lower support inclined connection rods, which are arranged inside the two first lower support inclined connection rods and form a triangle with one of the first lower support inclined connection rods and the lower support positioning seat.

8. The steel truss jacking device of claim 1, wherein: the upper support further comprises an upper support reinforcing frame and first upper support diagonal struts, the upper support reinforcing frame is disposed below the jacking cap, in a square frame structure, the front and back are respectively connected with the positioning rods through two symmetrically disposed first upper support diagonal struts, the first upper support diagonal struts are disposed obliquely outward from bottom to top, the upper support reinforcing frame and the first upper support diagonal struts can be matched and placed into the internal space surrounded by the segmental columns and the segmental diagonal struts.

9. The steel truss jacking device of claim 8, wherein: the upper support further comprises two symmetrically disposed second upper support diagonal struts, the second upper support diagonal struts are disposed inside the two first upper support diagonal struts, and form a triangle with one of the first upper support diagonal struts and the positioning rods.

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