Box girder hoisting device and hoisting method thereof

Abstract

The invention relates to the technical field of box girder hoisting, and particularly discloses a box girder hoisting device and a hoisting method.The box girder hoisting device comprises a hoisting frame and hoisting assemblies, the extension direction of the hoisting frame is defined as the front-back direction, and the hoisting assemblies are arranged on the hoisting frame at intervals in the front-back direction; the hoisting assembly comprises two hoisting components which are symmetrically arranged on the hoisting frame left and right, and each hoisting component comprises a supporting rod and a sliding rod; one end of the supporting rod is rotationally connected with the lifting frame, a driving assembly for driving the supporting rod to rotate is arranged on the lifting frame, the sliding rod is slidably connected to the other end of the supporting rod, and a driving piece for driving the sliding rod to move is arranged on the supporting rod; when the driving assembly drives the supporting rod to rotate by a preset angle, the driving piece drives the sliding rods to stretch out till the two sliding rods in bilateral symmetry abut against the box girder. According to the box girder hoisting device and the hoisting method thereof, the inclination phenomenon of the box girder can be effectively prevented, and it is ensured that the box girder can be accurately placed and installed.

Description

Technical Field

[0001] The invention relates to the technical field of box girder hoisting, and in particular to a box girder hoisting device and a hoisting method thereof. Background Art

[0002] As an important building structural component, the accuracy and integrity of the box girder are crucial for subsequent installation and use. In order to ensure that the box girder is not damaged during the hoisting process, maintain its original shape and size, and that the hoisting process can be carried out more smoothly and efficiently, it is necessary to ensure the balance between the box girder and the hoisting device when hoisting the box girder.

[0003] A Chinese patent with announcement number CN117163817B discloses a prefabricated box girder lifting device and method, wherein the prefabricated box girder lifting device includes a positioning assembly, a connecting assembly, a limiting assembly, an angle adjustment assembly, a locking assembly and a moving assembly, the positioning assembly includes a box body, a first limiting block, a second limiting block, a gear and a motor, the angle adjustment assembly includes an angle adjustment unit, the angle adjustment unit includes a support arm, an adjustment rod and a second hydraulic cylinder, and the moving assembly includes a moving seat, a fourth hydraulic cylinder, a fixed plate, a counterweight and a lifting lug.

[0004] The above patent drives the fixed plate to move by the fourth hydraulic cylinder, and the fixed plate drives the box of the adjustment assembly to move so that the box can correspond to the center line of the box beam. However, the lifting lug is set on the moving seat. When the fixed plate drives the box to move and adjust the position, the center line position of the box and the moving seat will be offset. Although the box clamps the box beam by the first limit block, the second limit block and the support arm symmetrically arranged on both sides of the box beam to center the box beam and the box, the center lines of the box beam and the moving seat may be staggered, and the lifting lug corresponds to the center line of the moving seat. Therefore, when lifting through the lifting lug, the box beam may tilt, affecting the accurate installation of the box beam.

[0005] Therefore, the art needs a box girder hoisting device and a hoisting method thereof to solve the above problems. Summary of the invention

[0006] The present invention provides a box girder hoisting device and a hoisting method thereof, aiming to solve the problem that the hoisting device in the related art cannot ensure that the center line is aligned with the center line of the box girder, resulting in the box girder being easily skewed during hoisting.

[0007] On the one hand, the present invention provides a box girder hoisting device, comprising a hoisting frame and a hoisting assembly arranged on the hoisting frame, wherein the hoisting frame extends along the length direction of the box girder, and the extension direction of the hoisting frame is defined as the front-to-back direction, and the hoisting assembly is arranged on the hoisting frame at intervals along the front-to-back direction, and the hoisting assembly comprises two hoisting members arranged on the hoisting frame in a left-right symmetrical manner, and the hoisting member comprises a support rod and a sliding rod; One end of the support rod is rotatably connected to the hanging frame, and a driving component for driving the support rod to rotate is provided on the hanging frame, the sliding rod is slidably connected to the other end of the support rod, and a driving member for driving the sliding rod to move along the extension direction of the support rod is provided on the support rod; When the driving assembly drives the support rod to rotate by a preset angle in a direction close to the box beam, the driving member drives the sliding rod to extend until the two sliding rods symmetrical on the left and right are against the box beam.

[0008] By deploying the hoisting components on the hoisting frame in a left-right symmetrical manner, the stable balance state between the hoisting frame and the hoisting components is first ensured. By synchronously rotating the support rods to an inclined state and extending the sliding rods, the relative position between the hoisting frame and the box girder is adjusted to achieve precise centering, ensuring that the center lines of the left and right sides of the hoisting frame and the center lines of the left and right sides of the box girder are completely consistent in the vertical direction. Therefore, the balance state between the entire hoisting frame and the box girder is maintained during the hoisting operation, effectively preventing the box girder from tilting, which is conducive to the precise placement and installation of the box girder.

[0009] Preferably, a clamping rod is rotatably connected to the rotating shaft of the support rod and the lifting frame, and a torsion spring is provided at the rotating connection between the clamping rod and the rotating shaft. When the torsion spring is in a natural state, the angle between the clamping rod and the support rod is an acute angle, and when the two sliding rods symmetrically located on the left and right are both against the box beam, the clamping rod is against the left and right sides of the box beam.

[0010] The clamping rod cooperates with the sliding rod and the supporting rod to fix the position of the box girder, thereby improving the stability of the box girder during the lifting process.

[0011] Preferably, a limit assembly is provided on the lifting frame, and when the support rod is rotated to a horizontal state, the driving member drives the sliding rod to extend to support the bottom of the box beam, and the clamping rod abuts against the left and right sides of the box beam, and the limit assembly limits the movement of the clamping rod.

[0012] The movement of the clamping rod is restricted by the limit assembly, so that the clamping rod is kept in a position closely against the left and right sides of the box beam, thereby fixing the box beam in the left and right directions. At the same time, when the support rod is rotated to a horizontal state, the automatic telescopic cylinder 2 is controlled to drive the sliding rod to extend, so that the sliding rod supports the bottom of the box beam, thereby further improving the stability during the lifting of the box beam.

[0013] Preferably, the driving assembly includes an automatic telescopic cylinder and a connecting rod, the automatic telescopic cylinder extends vertically and is fixedly mounted on the lifting frame, the two ends of the connecting rod are respectively hinged to the driving end of the automatic telescopic cylinder and the rod body of the support rod, and the automatic telescopic cylinder drives the connecting rod to drive the support rod to rotate.

[0014] Preferably, the connecting rod is hinged to the automatic telescopic cylinder via a rotating shaft, a guide groove extending vertically is provided on the hanging frame, the rotating shaft extends into the guide groove and slides with the guide groove vertically.

[0015] The support rod is driven to rotate by an automatic telescopic cylinder-driving connecting rod, which ensures the stability of the support rod rotation process. Moreover, when the support rod and the sliding rod support and hoist the box girder, the cooperation of the guide groove and the rotating shaft provides stable support for the support rod, thereby improving the reliability of the hoisting device.

[0016] Preferably, the limiting assembly includes a limiting column and a limiting groove, the limiting column is fixedly connected to the clamping rod, the limiting groove is provided on the connecting rod, and when the supporting rod is rotated to a horizontal state, the limiting column is clamped in the limiting groove.

[0017] Preferably, a plug-in structure is provided at the ends of the two left-right symmetrical sliding rods, and after the support rod is rotated to a horizontal state, the driving member drives the two sliding rods to move toward each other until the plug-in structure is plugged in.

[0018] Through the cooperation of the plug-in structure, the supporting stability and reliability of the support rod and the sliding rod to the box beam can be further improved.

[0019] Preferably, the hanging frame is provided with a receiving groove for receiving the connecting rod, the supporting rod and the clamping rod.

[0020] In the initial state, the support rods, connecting rods and clamping rods are all located in the receiving grooves, ensuring that no additional structure protrudes between the installation rods. When the lifting frame is lifted above the box girder for installation, it can effectively prevent the support rods, connecting rods and clamping rods from accidentally touching the box girder, thereby ensuring that the lifting frame can be placed in place steadily and smoothly.

[0021] Preferably, the hanging frame is provided with a support plate below the support rod, and when the support rod is rotated to a horizontal state, the support rod is in contact with the support plate.

[0022] When the support rod rotates to a horizontal state, the support rod fits with the support plate, so that the support plate can also support the support rod and the sliding rod, further improving the support stability and reliability of the box girder.

[0023] On the other hand, the present invention further provides a box girder hoisting method, using the box girder hoisting device described in any one of the above preferred technical solutions, the box girder hoisting method comprises the following steps: The hoisting frame is hoisted so that it is located above the box beam, and the hoisting components are located on the left and right sides of the box beam; Control the driving assembly to drive the support rod to rotate in a direction close to the box beam. When the support rod rotates by a preset angle, the driving member drives the sliding rod to extend until the two sliding rods symmetrically on the left and right sides are against the box beam, and the center line between the left and right sides of the hanging frame is aligned with the center line between the left and right sides of the box beam; The hoisting frame is hoisted, and the hoisting frame hoists the box beam through the sliding rod and the supporting rod.

[0024] The beneficial effects of the box girder hoisting method of the present invention are the same as the beneficial effects of the box girder hoisting device of the present invention, which will not be described in detail here.

[0025] The beneficial effects of the present invention are as follows: the present invention ensures a stable balance state between the hoisting frame and the hoisting components by deploying the hoisting components on the hoisting frame in a left-right symmetrical manner, and adjusts the relative position between the hoisting frame and the box beam by synchronously rotating the support rod to an inclined state and extending the sliding rod to achieve precise centering, ensuring that the center lines of the left and right sides of the hoisting frame and the center lines of the left and right sides of the box beam are completely consistent in the vertical direction, thereby maintaining the balance state between the entire hoisting frame and the box beam during the hoisting operation, effectively preventing the box beam from tilting, and facilitating the precise placement and installation of the box beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a state diagram of a box beam hoisting device when hoisting a box beam.

[0027] Figure 2 The utility model is a front view of a box beam hoisting device of the present invention when hoisting a box beam.

[0028] Figure 3 It is a right side view of a box beam hoisting device of the present invention when hoisting a box beam.

[0029] Figure 4 yes Figure 3 Cross-sectional view of the middle section AA.

[0030] Figure 5 It is a schematic diagram of a driving assembly and a support rod of a box beam lifting device of the present invention from a first perspective.

[0031] Figure 6 It is a schematic diagram of a driving assembly and a support rod of a box beam hoisting device of the present invention from a second viewing angle.

[0032] Figure 7 The present invention is a cross-sectional view of a hoisting frame of a box beam hoisting device.

[0033] Reference numerals: 1. Lifting frame; 11. Top plate; 12. Mounting rod; 13. Lifting ring; 14. Guide groove; 15. Accommodating groove; 16. Avoidance groove; 17. Support plate; 2. Support rod; 21. Mounting groove; 3. Sliding rod; 31. Plug-in column; 32. Plug-in groove; 33. Accommodating hole; 34. Spring; 4. Box beam; 5. Clamping rod; 51. Limiting column; 6. Automatic telescopic cylinder 1; 61. Connecting rod; 62. Rotating shaft; 63. Limiting groove; 7. Automatic telescopic cylinder 2. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 7 As shown, a box girder hoisting device of the present invention comprises a hoisting frame 1 and a hoisting assembly arranged on the hoisting frame 1. The hoisting frame 1 comprises a top plate 11 and a mounting rod 12 integrally formed with the top plate 11, the top plate 11 extends along the length direction of the box girder 4, and the extension direction of the top plate 11 is defined as the front-to-back direction. Four lifting rings 13 are fixedly connected to the top of the top plate 11, and the four lifting rings 13 are distributed in a matrix, and the center of the rectangle formed by the connecting lines between the four lifting rings 13 is located on the same vertical line as the center of the top plate 11. The cross section of the top plate 11 is rectangular, and the mounting rod 12 extends vertically and is connected to the bottom of the top plate 11 near the four corners.

[0036] There are two sets of hanging components, which are arranged on the hanging frame 1 at intervals along the front-back direction. The hanging components include two hanging members symmetrically arranged on the hanging frame 1, and the hanging members include a support rod 2 and a sliding rod 3. One end of the support rod 2 is rotatably connected to the mounting rod 12 of the hanging frame 1, and a driving component for driving the support rod 2 to rotate is provided on the hanging frame 1, and the sliding rod 3 is slidably connected to the other end of the support rod 2, and a driving member for driving the sliding rod 3 to move along the extension direction of the support rod 2 is provided on the support rod 2.

[0037] When lifting the box girder 4, the box girder 4 is placed on the supporting pier for supporting the box girder 4, and the lifting frame 1 is lifted so that the top plate 11 of the lifting frame 1 is located above the box girder 4, and the lifting components are located on the left and right sides of the box girder 4. In the initial state, the support rod 2 is in a vertical state, and the bottom end of the support rod 2 is rotatably connected to the mounting rod 12, and then all driving components are controlled to synchronously drive the support rod 2 to rotate in the direction close to the box girder 4, and stop rotating when rotating at a preset angle, and control all driving parts to drive the sliding rod 3 to extend. If there is a deviation between the position of the lifting frame 1 and the box girder 4, one of the sliding rods 3 will first contact the inclined side of the box girder 4, and in the process of continuing to extend, it will push the lifting frame 1 to move, until the two sliding rods 3 are both against the box girder 4, the position of the lifting frame 1 and the box girder 4 is aligned, and then the lifting ring 13 is lifted, and the lifting frame 1 lifts the box girder 4 through the support of the sliding rod 3 and the support rod 2.

[0038] The present invention ensures the balance between the hoisting frame 1 and the hoisting components by arranging the hoisting components on the hoisting frame 1 symmetrically. Then, the support rod 2 is synchronously rotated to an inclined state to extend the sliding rod 3, and the position between the hoisting frame 1 and the box beam 4 is adjusted and aligned to ensure that the center line position between the left and right sides of the hoisting frame 1 is aligned with the center line position between the left and right sides of the box beam 4. This achieves the balance between the entire hoisting frame 1 and the box beam 4 during the hoisting process, avoids the box beam 4 from being skewed, and is conducive to the accurate placement and installation of the box beam 4.

[0039] like Figure 4 As shown, the support rod 2 is rotatably connected to the shaft that is rotatably connected to the hanging frame 1, and a torsion spring (not shown in the figure) is provided at the rotation connection between the clamping rod 5 and the shaft. When the torsion spring is in a natural state, the angle between the clamping rod 5 and the support rod 2 is an acute angle. In the process of the support rod 2 rotating from a vertical state to a direction close to the box beam 4, the clamping rod 5 rotates with the support rod 2. After the support rod 2 rotates by a preset angle, the clamping rod 5 abuts against the box beam 4. When the two left-right symmetrical sliding rods 3 abut against the box beam 4, the two left-right symmetrical clamping rods 5 abut against the box beam 4 under the elastic force of the torsion spring. The clamping rod 5 cooperates with the sliding rod 3 and the support rod 2 to fix the position of the box beam 4.

[0040] like Figures 4 to 7As shown, the driving assembly includes an automatic telescopic cylinder 6 and a connecting rod 61. The automatic telescopic cylinder 6 extends vertically and is fixedly installed on the mounting rod 12. Two connecting rods 61 are symmetrically arranged along the front-back direction, and one end of the connecting rod 61 is hinged to the driving end of the automatic telescopic cylinder 6 through a rotating shaft 62, and the other end is hinged to the rod body of the support rod 2. As an example, the automatic telescopic cylinder 6 is an electric telescopic cylinder. A guide groove 14 extending vertically is provided on the mounting rod 12, and the rotating shaft 62 extends into the guide groove 14 and slides with the guide groove 14 vertically. When the automatic telescopic cylinder 6 is controlled to extend, the automatic telescopic cylinder 6 drives the rotating shaft 62 to drive one end of the connecting rod 61 to move downward, and the other end of the connecting rod 61 drives the support rod 2 to rotate downward toward the box beam 4. When the automatic telescopic cylinder 6 is controlled to shrink, the automatic telescopic cylinder 6 drives the rotating shaft 62 to drive one end of the connecting rod 61 to move upward, and the other end of the connecting rod 61 drives the support rod 2 to rotate upward.

[0041] Continue reading Figure 4 The driving member is an automatic telescopic cylinder 27. As an example, the automatic telescopic cylinder 27 is an electric telescopic cylinder. A mounting groove 21 for accommodating the automatic telescopic cylinder 27 is provided in the support rod 2. The automatic telescopic cylinder 27 is fixedly installed in the mounting groove 21. The sliding rod 3 is fixedly connected to the driving end of the automatic telescopic cylinder 27.

[0042] Continue reading Figures 4 to 6 , a limit assembly is provided on the hoisting frame 1, and the limit assembly includes a limit column 51 and a limit groove 63, the limit column 51 is fixedly connected to the clamping rod 5, and the limit groove 63 is provided on the connecting rod 61. In order to improve the stability when hoisting the box beam 4, after the two symmetrical sliding rods 3 are extended and all abutted against the box beam 4, the automatic telescopic cylinder 1 6 is controlled to continue to drive the connecting rod 61 to drive the support rod 2 to rotate downward, and at the same time, the automatic telescopic cylinder 2 7 is controlled to drive the sliding rod 3 to retract into the support rod 2, so as to avoid the sliding rod 3 and the box beam 4 from abutting against each other during the downward rotation of the support rod 2, thereby interfering with the rotation of the support rod 2. Since the clamping rod 5 is tightly abutted against the two sides of the box beam 4 under the elastic force of the torsion spring, the relative position between the box beam 4 and the hoisting frame 1 will not change after the sliding rod 3 is retracted and separated from the contact with the box beam 4. When the support rod 2 rotates to a horizontal state, the limit groove 63 on the connecting rod 61 is locked with the limit column 51 on the clamping rod 5, and the limit groove 63 and the limit column 51 cooperate to limit the movement of the clamping rod 5, so that the clamping rod 5 is kept in a position close to the left and right sides of the box beam 4, and the box beam 4 is fixed in the left and right directions. At the same time, when the support rod 2 rotates to a horizontal state, the automatic telescopic cylinder 2 7 is controlled to drive the sliding rod 3 to extend, so that the sliding rod 3 supports the bottom of the box beam 4, thereby ensuring the stability of the box beam 4 during the hoisting process.

[0043] like Figure 2 and Figure 4As shown, when the support rod 2 rotates to a horizontal state, the rotating shaft 62 connected to the connecting rod 61 and the automatic telescopic cylinder 6 just moves to the bottom end of the guide groove 14. When the support rod 2 and the sliding rod 3 support and hoist the bottom of the box beam 4, the rotating shaft 62 cooperates with the guide groove 14 to support the support rod 2, thereby ensuring the stability and reliability of the support rod 2.

[0044] The ends of the two symmetrical sliding rods 3 are provided with a plug-in structure, which includes a plug-in column 31 and a plug-in slot 32. The plug-in slot 32 is provided at the end of the left sliding rod 3, and a receiving hole 33 is provided at the end of the right sliding rod 3. The plug-in column 31 is inserted into the receiving hole 33 and elastically connected to the receiving hole 33 through a spring 34. It should be noted that the elastic potential energy of the spring 34 is relatively large. When the sliding rod 3 is extended to center the box beam 4 and the hanging frame 1, the plug-in column 31 can be compressed into the receiving hole 33, and will not affect the centering of the box beam 4 and the hanging frame 1. Through the coordination of the plug-in structure, the support stability and reliability of the support rod 2 and the sliding rod 3 on the box beam 4 can be further improved.

[0045] like Figure 4 and Figure 7 As shown, a receiving groove 15 is provided in the mounting rod 12. When the automatic telescopic cylinder 16 drives the connecting rod 61 to drive the support rod 2 to rotate upward to a vertical state, the support rod 2, the connecting rod 61 and the clamping rod 5 are all located in the receiving groove 15, ensuring that no other structure extends between the mounting rods 12. When the hoisting frame 1 is hoisted onto the box beam 4, the support rod 2, the connecting rod 61 and the clamping rod 5 are prevented from accidentally hitting the box beam 4, which is conducive to the smooth placement of the hoisting frame 1. In addition, an avoidance groove 16 is provided on the receiving groove 15 to avoid the limit column 51 on the clamping rod 5, so that the clamping rod 5 can be smoothly stored in the receiving groove 15.

[0046] A support plate 17 is provided at the bottom of the accommodating groove 15. When the support rod 2 rotates to a horizontal state, the support rod 2 fits against the support plate 17. The support plate 17 forms a stopper for the support rod 2 and the sliding rod 3 to rotate downward, and at the same time has a certain supporting force on the support rod 2, further improving the support stability and reliability of the box beam 4.

[0047] A box girder hoisting method, using the box girder hoisting device in the above embodiment, the box girder hoisting method comprises the following steps: The hoisting frame 1 is hoisted onto the box beam 4 through the hoisting ring 13, so that the top plate 11 of the hoisting frame 1 is located above the box beam 4, and the hoisting components are located on the left and right sides of the box beam 4; The automatic telescopic cylinder 1 6 is controlled to drive the support rod 2 to rotate in the direction close to the box beam 4, and the driving is stopped when it rotates to a preset angle. At this time, the clamping rod 5 is rotated out of the accommodating groove 15 and abuts against the two sides of the box beam 4. The automatic telescopic cylinder 2 7 is controlled to drive the sliding rod 3 to extend until the two sliding rods 3 symmetrically on the left and right sides abut against the box beam 4. The center line between the left and right sides of the hanging frame 1 and the center line between the left and right sides of the box beam 4 are aligned in the vertical direction. The clamping rod 5 is tightly abutted against the two sides of the box beam 4 under the elastic force of the torsion spring, and the box beam 4 is initially positioned in the left and right directions. The automatic telescopic cylinder 1 6 is controlled to continue to drive the connecting rod 61 to drive the support rod 2 to rotate downward, and the automatic telescopic cylinder 2 7 is controlled to drive the sliding rod 3 to retract into the support rod 2. When the support rod 2 rotates to a horizontal state, the automatic telescopic cylinder 2 7 is controlled to drive the sliding rod 3 to extend, so that the sliding rod 3 supports the bottom of the box beam 4. At the same time, the limit groove 63 on the connecting rod 61 is clamped with the limit column 51 on the clamping rod 5, so that the clamping rod 5 is kept in a position tightly against the left and right sides of the box beam 4, and the box beam 4 is fixed in the left and right directions; The lifting frame 1 is hoisted, and the lifting frame 1 lifts the box beam 4 through the sliding rod 3 and the supporting rod 2.

[0048] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A box girder hoisting device, comprising a hoisting frame (1) and a hoisting assembly arranged on the hoisting frame (1), characterized in that: The hanging frame (1) extends along the length direction of the box beam (4), and the extension direction of the hanging frame (1) is defined as the front-to-back direction. The hanging components are arranged on the hanging frame (1) at intervals along the front-to-back direction. The hanging components include two hanging components that are symmetrically arranged on the hanging frame (1). The hanging components include a support rod (2) and a sliding rod (3). One end of the support rod (2) is rotatably connected to the hanging frame (1), and the hanging frame (1) is provided with a driving component for driving the support rod (2) to rotate; the sliding rod (3) is slidably connected to the other end of the support rod (2), and the support rod (2) is provided with a driving component for driving the sliding rod (3) to move along the extension direction of the support rod (2); When the driving assembly drives the support rod (2) to rotate by a preset angle in a direction close to the box beam (4), the driving member drives the sliding rod (3) to extend until the two sliding rods (3) symmetrically on the left and right are in contact with the box beam (4).

2. The box beam hoisting device according to claim 1, characterized in that: A clamping rod (5) is rotatably connected to the rotating shaft that is rotatably connected to the support rod (2) and the hanging frame (1); a torsion spring is provided at the rotation connection between the clamping rod (5) and the rotating shaft; when the torsion spring is in a natural state, the angle between the clamping rod (5) and the support rod (2) is an acute angle; when the two sliding rods (3) that are symmetrical on the left and right are both against the box beam (4), the clamping rod (5) is against the left and right sides of the box beam (4).

3. The box beam hoisting device according to claim 2, characterized in that: The hoisting frame (1) is provided with a limit assembly. When the support rod (2) is rotated to a horizontal state, the driving member drives the sliding rod (3) to extend to support the bottom of the box beam (4). The clamping rod (5) abuts against the left and right sides of the box beam (4). The limit assembly limits the movement of the clamping rod (5).

4. The box beam hoisting device according to claim 3, characterized in that: The driving assembly comprises an automatic telescopic cylinder (6) and a connecting rod (61); the automatic telescopic cylinder (6) extends vertically and is fixedly mounted on the hanging frame (1); two ends of the connecting rod (61) are respectively hinged to the driving end of the automatic telescopic cylinder (6) and the rod body of the support rod (2); the automatic telescopic cylinder (6) drives the connecting rod (61) to drive the support rod (2) to rotate.

5. The box beam hoisting device according to claim 4, characterized in that: The connecting rod (61) is hinged to the automatic telescopic cylinder (6) via a rotating shaft (62); a guide groove (14) extending vertically is provided on the hanging frame (1); the rotating shaft (62) extends into the guide groove (14) and is slidably matched with the guide groove (14) in the vertical direction.

6. The box beam hoisting device according to claim 4, characterized in that: The limiting assembly comprises a limiting column (51) and a limiting groove (63); the limiting column (51) is fixedly connected to the clamping rod (5); the limiting groove (63) is formed on the connecting rod (61); when the supporting rod (2) rotates to a horizontal state, the limiting column (51) is clamped in the limiting groove (63).

7. The box beam hoisting device according to claim 3, characterized in that: The ends of the two sliding rods (3) that are symmetrical on both sides are provided with plug-in structures. After the support rod (2) is rotated to a horizontal state, the driving member drives the two sliding rods (3) to move in a direction close to each other until the plug-in structures are plugged in.

8. The box beam hoisting device according to claim 4, characterized in that: The hanging frame (1) is provided with a receiving groove (15) for receiving the connecting rod (61), the supporting rod (2) and the clamping rod (5).

9. The box beam hoisting device according to claim 8, characterized in that: The hanging frame (1) is provided with a support plate (17) below the support rod (2); when the support rod (2) is rotated to a horizontal state, the support rod (2) is in contact with the support plate (17).

10. A box girder hoisting method, characterized in that: Using the box girder hoisting device according to any one of claims 1 to 9, the box girder hoisting method comprises the following steps: The hoisting frame (1) is hoisted so that it is located above the box beam (4), and the hoisting components are located on the left and right sides of the box beam (4); Controlling the driving component to drive the support rod (2) to rotate in a direction close to the box beam (4); when the driving component rotates to a preset angle, the driving component drives the sliding rod (3) to extend until the two sliding rods (3) symmetrically on the left and right sides abut against the box beam (4), and the center line between the left and right sides of the hanging frame (1) is aligned with the center line between the left and right sides of the box beam (4); The hoisting frame (1) is hoisted, and the hoisting frame (1) hoists the box beam (4) via the sliding rod (3) and the supporting rod (2).

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