Temporary support for hoisting steel box girder

Abstract

The application relates to a temporary support for hoisting a steel box girder and belongs to the technical field of steel box girder construction. The temporary support comprises a plurality of vertically arranged columns, a plurality of reinforcing rods connected between adjacent two columns, an I-shaped steel arranged between the upper portions of the columns, and a plurality of groups of jacks arranged above the I-shaped steel. The column comprises a first connecting unit and a second connecting unit alternately arranged in the vertical direction. The first connecting unit comprises four connecting sleeves arranged in a quadrangle, and four connecting rods fixedly connected between adjacent two connecting sleeves. The second connecting unit comprises four connecting columns arranged in a quadrangle. The top end and the bottom end of the connecting column are slidably inserted into the corresponding connecting sleeves on the upper side and the lower side. A support adjusting assembly is arranged between adjacent two groups of the first connecting unit. The temporary support is not easy to adjust the height in the prior art.

Description

Technical Field

[0001] This invention relates to a temporary support for hoisting steel box girders, belonging to the technical field of steel box girder construction. Background Technology

[0002] Currently, steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. They are generally used on bridges with large spans. With the rapid development of cities and the improvement of economic levels, steel box girder bridges are being used more and more widely in the reconstruction or construction of municipal roads. Due to their many advantages, they are often used to cross existing railways, highways, houses, dams and other structures.

[0003] During the construction of steel box girders, the primary function of temporary supports is to ensure construction safety and quality. By using temporary supports, the steel box girders can be supported and reinforced, ensuring their stability and preventing deformation and damage. This helps ensure structural integrity during construction, improving construction efficiency and quality.

[0004] Before construction, the shape and dimensions of temporary supports need to be designed based on the structural characteristics and usage requirements of the steel box girder. Simultaneously, a site survey is required to determine the installation location and fixing method of the supports. During the design process, factors such as the load-bearing capacity, stability, safety, and disassembly of the supports must be considered.

[0005] A search revealed a Chinese patent with publication number CN219010974U, which discloses a temporary support for the construction of a steel box girder. The key technical features are: it includes support columns and an adjustment assembly; the support columns are arranged in a matrix; a column base is provided at the bottom of each support column; a platform is provided on the top surface of the support columns, and a perimeter fence is provided around the platform; a strip groove is provided on the top of the platform, and a slider is provided within the strip groove; the adjustment assembly includes a hydraulic push rod and a telescopic device; the hydraulic push rod is fixed to the perimeter fence, and its output end extends into the platform and is fixedly connected to the slider; the telescopic device is located on top of the slider to support the steel box girder; a support plate is connected to the output end of the telescopic device; and support members for supporting the steel box girder are arranged at intervals along the long axis of the perimeter fence.

[0006] The above solution solves the problem of splicing steel box girders. However, when used to support steel box girders of different heights in different projects, the steel structure needs to be cut and reassembled, which is a complicated process and not easy to adjust.

[0007] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a temporary support for hoisting steel box girders, which solves the problem that the height of the temporary support is not easy to adjust in the prior art.

[0009] The technical problem to be solved by this invention is achieved by the following technical solution: A temporary support for hoisting a steel box girder includes several columns arranged in a matrix, several reinforcing rods connected between adjacent columns, I-beams positioned above the columns, and several sets of jacks positioned above the I-beams. Each column includes a first connecting unit and a second connecting unit arranged alternately in the vertical direction. The first connecting unit includes four connecting sleeves arranged at four corners and four connecting rods fixedly connected between adjacent connecting sleeves. The connecting sleeves are vertically arranged, and the connecting rods are horizontally arranged. The second connecting unit includes four connecting columns arranged at four corners. The top and bottom ends of the connecting columns are slidably inserted into the corresponding connecting sleeves on the upper and lower sides. A support adjustment assembly is provided between adjacent sets of the first connecting units. The support adjustment assembly includes a hinged ball and four support rods hinged to the hinged ball. The hinged ball has four circumferential track grooves with progressively increasing depths. Each of the four support rods has a fixing ring in the middle, and the fixing rings are rotatably connected to the circumferential track grooves. The top and bottom of the outer wall of the connecting sleeve are fixedly connected to connecting plates. Each connecting plate has a sliding groove extending in the horizontal direction. The top and bottom ends of the support rods are connected to the sliding grooves by bolt connections.

[0010] The present invention is further configured to include an adjustment drive mechanism, the adjustment drive mechanism comprising a main body, an installation cavity opened inside the main body, and four winding wheels rotatably connected to the installation cavity and arranged in a ring, each winding wheel having a pull rope wound on it, the end of each pull rope having a hook, and the upper half of each support rod having a pull ring fixedly connected to it. Each of the winding wheels is coaxially fixedly connected to a driven gear. The central part of the mounting cavity is rotatably connected to a driving gear via a rotating shaft. The driving gear meshes with four driven gears. The end of the rotating shaft extends to the outside of the main body and is fixedly connected to a first worm gear. The outer wall of the main body is rotatably supported by a first worm via a bearing seat. The first worm meshes with the first worm gear. A protective shell is fitted over the first worm gear and the first worm. One end of the first worm extends to the outside of the protective shell and has a hexagonal groove.

[0011] The present invention is further configured such that: the connecting sleeve and the connecting posts on the upper and lower sides cooperate to form a filling cavity, and each of the connecting sleeves is provided with a filling port corresponding to the filling cavity, and each of the filling ports is provided with a sealing cap.

[0012] The present invention is further configured to include a correction component, the correction component including a base plate, a fixed rod fixedly connected to the base plate and arranged vertically, a force-applying rod hinged to the fixed rod, and a telescopic rod assembly for driving the force-applying rod, the other end of the force-applying rod being connected to the column.

[0013] The present invention is further configured such that: the telescopic rod assembly includes a fixed sleeve with its bottom end hinged to the base plate, a drive rod slidably inserted into the fixed sleeve, a drive ring rotatably connected to the top end face of the fixed sleeve and threadedly connected to the drive rod, a drive motor fixedly installed on the outer wall of the fixed sleeve, a rotating gear disposed on the output shaft of the drive motor, and a driven gear coaxially fixedly connected to the outer wall of the drive ring and meshing with the drive gear; The top end face of the fixed sleeve is provided with a limiting ring groove that rotates around its circumference. The bottom end face of the drive ring is fixedly connected to a connecting ring that is rotatably connected to the limiting ring groove. The cross-sections of the limiting ring groove and the connecting ring are both T-shaped. The side wall of the drive rod is provided with a limiting groove that extends along its length. The inner wall of the fixed sleeve is fixedly connected to a limiting block that is slidably connected to the limiting groove.

[0014] The present invention is further configured such that: there are two force-applying rods, one end of each of the two force-applying rods is hinged to the fixed rod, the two force-applying rods are arranged in parallel and of equal length, and the other end of each of the two force-applying rods is provided with a clamp.

[0015] The present invention is further configured such that: the jack includes a support sleeve fixedly connected to the top of the I-beam and arranged vertically, a hydraulic cylinder disposed within the support sleeve, a mounting block connected to the top of the piston rod of the hydraulic cylinder, and a roller rotatably supported on the mounting block, the roller being housed inside the support sleeve.

[0016] The invention is further configured such that: the roller is connected to the mounting block via a support shaft, the roller is rotatably connected to the mounting block via the support shaft, a second worm gear is coaxially fixedly connected to the support shaft, a second worm gear meshing with the second worm gear is rotatably connected to the mounting block, a drive gear is coaxially fixedly connected to one end of the second worm gear, a drive rack extending vertically and meshing with the drive gear is provided on the inner wall of the support sleeve, a one-way transmission is provided between the drive gear and the second worm gear, and the one-way transmission causes the second worm gear to rotate when the drive gear moves upward.

[0017] The present invention is further configured such that: the support sleeve includes a fixed part and a rotating part rotatably connected to the top end of the fixed part; the mounting block and the drive rack are both located inside the rotating part; and the mounting block is rotatably connected to the top end of the piston rod of the hydraulic cylinder.

[0018] The beneficial effects of this invention are: With the cooperation of several sets of columns, during the assembly of the temporary support, an adjustment drive mechanism is used to attach the hooks of the pull ropes on the four winding wheels to the pull rings of the support rods, one by one, for the support adjustment assembly between the first connecting units in the columns. At this time, the first worm is rotated by a power tool. Under the transmission of the first worm wheel and the first worm, the four winding wheels rotate synchronously. During the rotation of the winding wheels, the four support rods in the support adjustment assembly synchronously retract towards the center or expand outwards, thereby adjusting the overall height of the support adjustment assembly. Since the support rods and the sliding grooves on the connecting plate slide together... When the overall height of the support adjustment changes, the spacing between two adjacent first connection units changes accordingly. After the adjustment of the support adjustment assembly is completed, the relative position between the connecting sleeve and the connecting column is determined. At this time, sand or other materials are filled into the filling cavity to support the filling cavity, thereby ensuring the stability between the first and second connection units. After the support adjustment assembly is locked by the bolt connection pair, the column is in a stable state and can be infinitely adjusted in height, thus making it suitable for the support of steel box girders in different projects, improving practicality and reducing material waste. By setting up a correction component, when the temporary support settles during the movement of the steel box girder, the correction component is placed at the column below the elevation, and the clamp of the force-applying rod is connected to the column. At this time, by starting the drive motor, the drive motor drives the drive ring to rotate through the transmission of the rotating gear and the driven gear. During the rotation of the drive ring, the drive rod threaded in the drive ring is limited in the circumferential direction, causing the drive rod to push the force-applying rod to flip. During the flipping process, the column of the temporary support that has settled is lifted and kept in a horizontal state, thereby increasing the overall stability. By using a combination of support sleeves, hydraulic cylinders, and rollers, when it is necessary to move or correct the steel box girder on the temporary support, the hydraulic cylinder is activated, causing the rollers to move. As the rollers move upward, they rotate due to the drive of the drive gear and drive rack. This allows the steel box girder to move as a whole or be corrected when it is lifted. Furthermore, by using a second worm gear and a second worm between the rollers and the drive gear for transmission, the rollers are less likely to rotate on their own, making the support for the steel box girder more stable. During the downward movement of the rollers, the one-way transmission device prevents the rollers from rotating back during the downward movement. This allows for continuous movement or correction operations by repeatedly lifting the steel box girder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a partial structural diagram of the column in this invention.

[0021] Figure 3 This is a partial sectional view of the column portion in this invention.

[0022] Figure 4 This is a schematic diagram of the structure in which the supporting adjustment component and the adjustment drive mechanism cooperate in this invention.

[0023] Figure 5 This is a schematic diagram of the hinged ball part in this invention.

[0024] Figure 6 This is a schematic diagram of the support rod portion in this invention.

[0025] Figure 7 This is a schematic diagram of the adjustment drive mechanism in this invention.

[0026] Figure 8 This is a cross-sectional view of the adjustment drive mechanism in this invention.

[0027] Figure 9 This is a schematic diagram of the structure of the correction component in this invention.

[0028] Figure 10 This is a partial cross-sectional view of the telescopic rod assembly in this invention.

[0029] Figure 11 This is a cross-sectional view of the jack portion in this invention.

[0030] In the diagram: 1. Column; 2. Reinforcing rod; 3. I-beam; 4. Jack; 5. First connecting unit; 6. Second connecting unit; 7. Connecting sleeve; 8. Connecting rod; 9. Connecting column; 10. Filling cavity; 11. Filling interface; 12. Sealing cap; 13. Support adjustment assembly; 14. Hinge ball; 15. Support rod; 16. Circumferential track groove; 17. Fixing ring; 18. Connecting plate; 19. Slide groove; 20. Bolt connection pair; 21. Adjustment drive mechanism; 22. Main body; 23. Mounting cavity; 24. Winding wheel; 25. Pull rope; 26. Hook; 27. Pull ring; 28. Driven gear; 29. ​​Rotating shaft; 30. Driving gear; 31. First worm gear; 32. 33. First worm gear; 34. Protective shell; 35. Hexagonal groove; 36. Correction assembly; 37. Base plate; 38. Fixing rod; 39. Force application rod; 40. Telescopic rod assembly; 41. Clamp; 42. Fixing sleeve; 43. Drive rod; 44. Drive ring; 45. Drive motor; 46. Rotating gear; 47. Driven gear; 48. Limiting ring groove; 49. Connecting ring; 50. Limiting groove; 51. Limiting block; 52. Support sleeve; 53. Hydraulic cylinder; 54. Mounting block; 55. Roller; 56. Fixing part; 57. Rotating part; 58. Support shaft; 59. Second worm gear; 60. Drive gear; 61. Drive rack; 62. One-way transmission. Detailed Implementation

[0031] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific illustrations.

[0032] like Figures 1-11 As shown, a temporary support for hoisting a steel box girder includes several columns 1 arranged in a matrix, several reinforcing rods 2 connected between two adjacent columns 1, I-beams 3 set above the columns 1, and several sets of jacks 4 set above the I-beams. There are six columns 1 arranged in a 2×3 pattern. At the top of each row of columns 1, an I-beam 3 for supporting the steel box girder is fixedly connected. Jacks 4 are provided at both ends of the top of each I-beam 3.

[0033] To facilitate height adjustment of the column 1, the column 1 includes a first connecting unit 5 and a second connecting unit 6 arranged alternately in the vertical direction. The first connecting unit 5 includes four connecting sleeves 7 arranged at four corners and four connecting rods 8 fixedly connected between adjacent connecting sleeves 7. The connecting sleeves 7 are vertically arranged and the connecting rods 8 are horizontally arranged. The ends of the connecting rods 8 are fixedly connected to the middle of the connecting sleeves 7. The second connecting unit 6 includes four connecting posts 9 arranged at four corners. The top and bottom ends of the connecting posts 9 are slidably inserted into the corresponding connecting sleeves 7 on the upper and lower sides. The connecting sleeves 7 and the connecting posts 9 on the upper and lower sides cooperate to form a filling cavity 10. Each connecting sleeve 7 is provided with a filling port 11 corresponding to the filling cavity 10. Each filling port 11 is provided with a sealing cap 12. When the relative position between the connecting sleeves 7 and the connecting posts 9 is determined, sand or other materials are filled into the filling cavity 10 to support the filling cavity 10, thereby ensuring the stability between the first connecting unit 5 and the second connecting unit 6.

[0034] Each of the two adjacent sets of first connecting units 5 is provided with a support adjustment assembly 13. The support adjustment assembly 13 includes a hinge ball 14 and four support rods 15 hinged to the hinge ball 14. The hinge ball has four circumferential track grooves 16 with progressively increasing depths. The planes of the four circumferential track grooves 16 all intersect the radial extension line of the same hinge ball 14. Each of the four support rods 15 has a fixing ring 17 in the middle. The diameters of the fixing rings 17 are different and they correspond to the circumferential track grooves 16 one by one. The fixing rings 17 are rotatably connected to the circumferential track grooves 16 one by one. The top and bottom of the outer wall of the connecting sleeve 7 are fixedly connected with connecting plates 18. Each connecting plate 18 has a sliding groove 19 extending in the horizontal direction. The top and bottom ends of the support rods 15 are connected to the sliding grooves 19 by bolt connecting pairs 20.

[0035] To facilitate operation of the support adjustment assembly 13, an adjustment drive mechanism 21 is also provided. The adjustment drive mechanism 21 includes a main body 22, an installation cavity 23 opened inside the main body, and four winding wheels 24 rotatably connected to the installation cavity 23 and arranged in a ring. Each winding wheel 24 is wound with a pull rope 25, and the end of the pull rope 25 is provided with a hook 26. The upper half of the support rod 15 is fixedly connected with a pull ring 27. Each winding wheel 24 is coaxially fixedly connected with a driven gear 28. The central part of the mounting cavity 23 is rotatably connected to a driving gear 30 via a rotating shaft 29. The driving gear 30 meshes with the four driven gears 28. The end of the rotating shaft 29 extends to the outside of the main body 22 and is fixedly connected to a first worm gear 31. The outer wall of the main body 22 is rotatably supported by a first worm 32 via a bearing seat. The first worm 32 meshes with the first worm gear 31. A protective shell 33 is fitted over the first worm gear 31 and the first worm 32. One end of the first worm 32 extends to the outside of the protective shell 33 and has a hexagonal groove 34.

[0036] By employing the adjustment drive mechanism 21, for the support adjustment assembly 13 between the first connecting units 5 in the column 1, the hooks 26 of the pull ropes 25 on the four winding wheels 24 are hung one by one on the pull rings 27 of the support rods 15. At this time, the first worm 32 is rotated by a power tool. Under the transmission of the first worm wheel 31 and the first worm 32, the four winding wheels 24 rotate synchronously. During the rotation of the winding wheels 24, the four support rods 15 in the support adjustment assembly 13 are synchronously retracted towards the center or extended towards the four sides, thereby adjusting the overall height of the support adjustment assembly 13. Since the support rods 15 and the sliding grooves 19 on the connecting plate 18 are slidably connected, when the overall height of the support adjustment changes, the distance between the two adjacent first connecting units 5 changes accordingly.

[0037] To address the possibility of settlement of the temporary support structure, a correction component 35 is also provided. The correction component 35 includes a base plate 36, a fixed rod 37 fixedly connected to the base plate 36 and arranged vertically, a force-applying rod 38 hinged to the fixed rod 37, and a telescopic rod assembly 39 for driving the force-applying rod 38. There are two force-applying rods 38, one end of which is hinged to the fixed rod 37. The two force-applying rods 38 are parallel and of equal length. The other end of each force-applying rod 38 is provided with a clamp 40, which is connected to the column 1.

[0038] The telescopic rod assembly 39 includes a fixed sleeve 41 hinged to the bottom end of the base plate 36, a drive rod 42 slidably inserted into the fixed sleeve 41, a drive ring 43 rotatably connected to the top end face of the fixed sleeve 41 and threadedly connected to the drive rod 42, a drive motor 44 fixedly installed on the outer wall of the fixed sleeve 41, a rotating gear 45 disposed on the output shaft of the drive motor 44, and a driven gear 46 coaxially fixedly connected to the outer wall of the drive ring 43 and meshing with the drive gear 30.

[0039] The top end face of the fixed sleeve 41 is provided with a limiting ring groove 47 that rotates around its circumference. The bottom end face of the drive ring 43 is fixedly connected to a connecting ring 48 that is rotatably connected in the limiting ring groove 47. The cross-sections of the limiting ring groove 47 and the connecting ring 48 are both T-shaped. With the cooperation of the limiting ring groove 47 and the connecting ring 48, the fixed sleeve 41 and the drive ring 43 are axially limited. The side wall of the drive rod 42 is provided with a limiting groove 49 that extends along its length. The inner wall of the fixed sleeve 41 is fixedly connected to a limiting block 50 that is slidably connected to the limiting groove 49. With the cooperation of the limiting groove 49 and the limiting block 50, the fixed sleeve 41 and the drive rod 42 are circumferentially limited.

[0040] When the temporary support settles during the movement of the steel box girder, the correction component 35 is set at the column 1 below the elevation, and the clamp 40 of the force-applying rod 38 is connected to the column 1. At this time, by starting the drive motor 44, the drive motor 44 drives the drive ring 43 to rotate through the transmission of the rotating gear 45 and the driven gear 46. During the rotation of the drive ring 43, the drive rod 42 threaded in the drive ring 43 is circumferentially limited, causing the drive rod 42 to push the force-applying rod 38 to flip. During the flipping process, the force-applying rod 38 lifts the column 1 of the temporary support that has settled and keeps it in a horizontal state, thereby increasing the overall stability.

[0041] To facilitate the movement and correction of the steel box girder supported on the temporary support, the jack 4 includes a support sleeve 51 fixedly connected to the top of the I-beam 3 and arranged vertically, a hydraulic cylinder 52 disposed inside the support sleeve 51, a mounting block 53 connected to the top of the piston rod of the hydraulic cylinder 52, and a roller 54 rotatably supported on the mounting block 53. The roller 54 is housed inside the support sleeve 51 and is a directional roller. To facilitate the adjustment of the rotation of the roller 54, the support sleeve 51 includes a fixed part 55 and a rotating part 56 rotatably connected to the top of the fixed part 55. An axial limit is provided between the rotating part 56 and the fixed part 55. The mounting block 53 is located inside the rotating part 56 and is rotatably connected to the top of the piston rod of the hydraulic cylinder 52. An axial limit is provided between the mounting block 53 and the piston rod of the hydraulic cylinder 52.

[0042] Roller 54 is connected to mounting block 53 via support shaft 57. Roller 54 is rotatably connected to mounting block 53 via support shaft 57. Second worm gear 58 is coaxially fixedly connected to support shaft 57. Second worm 59, which meshes with second worm gear 58, is rotatably connected to mounting block 53. Drive gear 60 is coaxially fixedly connected to one end of second worm 59. Drive rack 61, which extends vertically and meshes with drive gear 60, is provided on the inner wall of rotating part 56 of support sleeve 51. One-way transmission device 62 is provided between drive gear 60 and second worm 59. When drive gear 60 moves upward, one-way transmission device drives second worm 59 to rotate.

[0043] With the cooperation of the support sleeve 51, hydraulic cylinder 52, and roller 54, when it is necessary to move or correct the steel box girder on the temporary support, the hydraulic cylinder 52 is activated, causing the roller 54 to move. As the roller 54 moves upward, it rotates due to the drive of the drive gear 60 and drive rack 61. This allows the steel box girder to move as a whole or be corrected when it is lifted. Furthermore, by setting a second worm gear 58 and a second worm 59 between the roller 54 and the drive gear 60 for transmission, the roller 54 is less likely to rotate on its own, making the support for the steel box girder more stable. During the downward movement of the roller 54, the one-way transmission device 62 prevents the roller 54 from rotating back during the downward movement. This allows for continuous movement or correction operations by repeatedly lifting the steel box girder.

[0044] The implementation principle of this invention is as follows: When assembling the temporary support, the adjustment drive mechanism 21 is used to attach the hooks 26 of the pull ropes 25 on the four winding wheels 24 to the pull rings 27 of the support rods 15 one by one for the support adjustment assembly 13 between the first connecting units 5 in the column 1. At this time, the first worm 32 is rotated by a power tool. Under the transmission of the first worm wheel 31 and the first worm 32, the four winding wheels 24 rotate synchronously. During the rotation of the winding wheels 24, the four support rods 15 in the support adjustment assembly 13 are synchronously retracted towards the center or extended towards the four sides, thereby adjusting the overall height of the support adjustment assembly 13. Due to the sliding grooves 1 on the support rods 15 and the connecting plate 18, The first connecting unit 5 and the second connecting unit 6 are connected by a sliding connection. When the overall height of the support adjustment changes, the distance between the two adjacent first connecting units 5 changes accordingly. After the adjustment of the support adjustment assembly 13 is completed, the relative position between the connecting sleeve 7 and the connecting column 9 is determined. At this time, sand or other materials are filled into the filling cavity 10 to support the filling cavity 10, thereby ensuring the stability between the first connecting unit 5 and the second connecting unit 6. After the support adjustment assembly 13 is locked by the bolt connection pair 20, the column 1 is in a stable state and can be infinitely adjusted in height, thus making it suitable for supporting steel box girders in different projects, improving practicality and reducing material waste.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A temporary support for hoisting a steel box girder, comprising a plurality of columns (1) arranged in a matrix, a plurality of reinforcing rods (2) connecting adjacent columns (1), I-beams (3) disposed above the plurality of columns (1), and a plurality of sets of jacks (4) disposed above the I-beams (3), characterized in that: The column (1) includes a first connecting unit (5) and a second connecting unit (6) arranged alternately in the vertical direction. The first connecting unit (5) includes four connecting sleeves (7) arranged in a four-corner arrangement and four connecting rods (8) fixedly connected between two adjacent connecting sleeves (7). The connecting sleeves (7) are arranged vertically and the connecting rods (8) are arranged horizontally. The second connecting unit (6) includes four connecting columns (9) arranged in a four-corner arrangement. The top and bottom ends of the connecting columns (9) are slidably inserted into the corresponding connecting sleeves (7) on the upper and lower sides. A support adjustment assembly (13) is provided between two adjacent sets of the first connecting units (5). The support adjustment assembly (13) includes a hinge ball (14) and four support rods (15) hinged to the hinge ball (14). The hinge ball (14) has four circumferential track grooves (16) with increasing depths. Each of the four support rods (15) has a fixing ring (17) in the middle. The fixing rings (17) are rotatably connected to the circumferential track grooves (16) one by one. The top and bottom of the outer wall of the connecting sleeve (7) are fixedly connected to the connecting plate (18). Each connecting plate (18) has a sliding groove (19) extending in the horizontal direction. The top and bottom of the support rods (15) are connected to the sliding groove (19) by bolt connection pairs (20). It also includes an adjustment drive mechanism (21), which includes a main body (22), an installation cavity (23) opened inside the main body (22), and four winding wheels (24) rotatably connected to the installation cavity (23) and arranged in a ring. Each winding wheel (24) is wound with a pull rope (25), and the end of the pull rope (25) is provided with a hook (26). The upper half of the support rod (15) is fixedly connected with a pull ring (27). Each of the winding wheels (24) is coaxially fixedly connected with a driven gear (28). The central part of the mounting cavity (23) is rotatably connected to a driving gear (30) via a rotating shaft (29). The driving gear (30) meshes with the four driven gears (28). The end of the rotating shaft (29) extends to the outside of the main body (22) and is fixedly connected to a first worm gear (31). The outer wall of the main body (22) is rotatably supported by a first worm (32) via a bearing seat. The first worm (32) meshes with the first worm gear (31). A protective shell (33) is fitted over the first worm gear (31) and the first worm (32). One end of the first worm (32) extends to the outside of the protective shell (33) and has a hexagonal groove (34).

2. The temporary support for hoisting a steel box girder according to claim 1, characterized in that: The connecting sleeve (7) cooperates with the connecting posts (9) on the upper and lower sides to form a filling cavity (10). Each connecting sleeve (7) is provided with a filling port (11) corresponding to the filling cavity (10), and each filling port (11) is provided with a sealing cap (12).

3. The temporary support for hoisting a steel box girder according to claim 1, characterized in that: It also includes a correction component (35), which includes a base plate (36), a fixed rod (37) fixedly connected to the base plate (36) and arranged vertically, a force-applying rod (38) hinged to the fixed rod (37), and a telescopic rod assembly (39) for driving the force-applying rod (38). The other end of the force-applying rod (38) is connected to the column (1).

4. A temporary support for hoisting a steel box girder according to claim 3, characterized in that: The telescopic rod assembly (39) includes a fixed sleeve (41) hinged to the bottom plate (36) at its bottom end, a drive rod (42) slidably inserted into the fixed sleeve (41), a drive ring (43) rotatably connected to the top end face of the fixed sleeve (41) and threadedly connected to the drive rod (42), a drive motor (44) fixedly installed on the outer wall of the fixed sleeve (41), a rotating gear (45) disposed on the output shaft of the drive motor (44), and a driven gear (46) coaxially fixedly connected to the outer wall of the drive ring (43) and meshing with the drive gear (30); The top end face of the fixed sleeve (41) is provided with a limiting ring groove (47) that rotates around its circumference. The bottom end face of the drive ring (43) is fixedly connected to a connecting ring (48) that is rotatably connected to the limiting ring groove (47). The cross-sections of the limiting ring groove (47) and the connecting ring (48) are both T-shaped. The side wall of the drive rod (42) is provided with a limiting groove (49) that extends along its length. The inner wall of the fixed sleeve (41) is fixedly connected to a limiting block (50) that is slidably connected to the limiting groove (49).

5. A temporary support for hoisting a steel box girder according to claim 3, characterized in that: There are two force-applying rods (38), one end of each force-applying rod (38) is hinged to the fixed rod (37), the two force-applying rods (38) are parallel and of equal length, and the other end of each force-applying rod (38) is provided with a clamp (40).

6. A temporary support for hoisting a steel box girder according to claim 1, characterized in that: The jack (4) includes a support sleeve (51) fixedly connected to the top of the I-beam (3) and arranged vertically, a hydraulic cylinder (52) disposed in the support sleeve (51), a mounting block (53) connected to the top of the piston rod of the hydraulic cylinder (52), and a roller (54) rotatably supported on the mounting block (53), the roller (54) being housed inside the support sleeve (51).

7. A temporary support for hoisting a steel box girder according to claim 6, characterized in that: The roller (54) is connected to the mounting block (53) via a support shaft (57). The roller (54) is rotatably connected to the mounting block (53) via the support shaft (57). A second worm gear (58) is coaxially fixedly connected to the support shaft (57). A second worm (59) that meshes with the second worm gear (58) is rotatably connected to the mounting block (53). A drive gear (60) is coaxially fixedly connected to one end of the second worm (59). A drive rack (61) extending vertically and meshing with the drive gear (60) is provided on the inner wall of the support sleeve (51). A one-way transmission (62) is provided between the drive gear (60) and the second worm (59). The one-way transmission (62) causes the second worm (59) to rotate when the drive gear (60) moves upward.

8. A temporary support for hoisting a steel box girder according to claim 7, characterized in that: The support sleeve (51) includes a fixed part (55) and a rotating part (56) rotatably connected to the top of the fixed part (55). The mounting block (53) and the drive rack (61) are both located inside the rotating part (56). The mounting block (53) is rotatably connected to the top of the piston rod of the hydraulic cylinder (52).

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