Sectional hoisting construction method and device for steel box girder

Abstract

The invention relates to the technical field of steel box girder hoisting, in particular to a segmental hoisting construction method and device for a steel box girder, according to the technical scheme, the segmental hoisting construction device comprises a base and a hoisting assembly, and the base is provided with a bottom frame, a guide rail and a protective frame; the lifting assembly comprises a bracket, a driving motor, a winding roller and a lifting hook. The construction method comprises the following steps: 1) a preparation stage: assembling the device, adjusting the distance between the underframes, and checking the hoisting assembly; (2) checking before hoisting, and confirming that an electrical system, a transmission system and a safety device are normal; 3) hoisting operation: starting a motor to control the lifting hook to lift; (4) moving adjustment is conducted, and the segments are moved to the installation positions; (5) mounting and fixing: accurately butting and fixing the sections; and (6) checking and accepting to ensure the mounting quality. Through the design of modularization, automation, motorization, safety guarantee, fine adjustment and accurate positioning, the problem that in the prior art, due to different sizes and shapes of steel box girders, a hoisting mechanism needs to be customized or adjusted is effectively solved, and the preparation time and cost before construction are reduced.

Description

Technical Field

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

[0002] Steel box girders, also known as steel plate box girders, are a type of structure often used in the construction of long-span bridges. They are mainly used in the construction of bridges with large spans and are named after their box-like appearance. In the construction process of bridges, given that the length of bridges is generally long, it is usually necessary to divide the steel box girders into several sections for the convenience of hoisting operations.

[0003] After extensive searching, the publication number is CN117208742A, which discloses a method for lifting and installing steel box girders in sections. The hook-pull assembly can be quickly fixedly connected to the steel box girder, so as to quickly lift the steel box girder to improve the lifting efficiency of the steel box girder, thereby improving the efficiency of bridge construction. When the rotating gear rotates, the rotating gear will drive the screw rod to rotate, and the rotation of the screw rod will drive the iron column to move downward in the vertical direction until the bottom block is inserted into the connecting hole, so that the hook-pull part can hook and pull the steel box girder. On the one hand, the cover tube prevents the driving gear and the driven gear from being directly exposed to the outside and forms protection; on the other hand, it can support the transmission rod, so that the transmission rod can act as a reinforcing rib to improve the strength between the ring rod and the support rod.

[0004] When the existing construction method is used, the lifting mechanism needs to be customized or adjusted according to the different sizes and shapes of the steel box girder to adapt to different construction requirements, which increases the preparation time and cost before construction. Therefore, a steel box girder segmented lifting construction method and device are needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a method and device for the segmented hoisting construction of a steel box girder, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a method and device for hoisting a steel box girder in sections, comprising a base, a hoisting assembly being movably mounted on the upper end surface of the base, the base comprising a bottom frame, the bottom frames being two in number, the two ends of the two bottom frames on opposite sides being movably connected by adjusting assemblies, the upper end surfaces of the two bottom frames being fixedly mounted with guide rails, and the opposite sides of the two bottom frames being fixedly mounted with a second protective frame;

[0007] The lifting assembly includes a bracket, and a first drive motor is fixedly installed on both sides of the rear end surface of the bracket, and winding rollers are rotatably installed on both sides of the upper end surface of the bracket at the front end of the first drive motor, and a wire management roller is rotatably installed on the upper end surface of the bracket on the opposite side of the two winding rollers, and a hook is suspended below the wire management roller through a wire rope.

[0008] Preferably, slides are fixedly mounted on opposite sides of the two base frames, and a power cord is slidably mounted on the slides. One end of the power cord is electrically connected to the control switch, and the other end of the power cord is electrically connected to the hanging assembly.

[0009] In the above scheme, by fixing the slide on the base frame and sliding the power cord on the slide, the length and position of the power cord can be easily adjusted to adapt to different construction environments and operating requirements. The electrical connection design between the power cord and the control switch and the lifting assembly can ensure the stability and safety of the power cord and reduce electrical failures and safety accidents caused by pulling or damage to the power cord. The sliding installed power cord is easy to inspect and maintain, which helps to promptly detect and solve power cord problems and reduce construction interruptions.

[0010] Preferably, the adjustment assembly includes two connecting seats and a cross bar, the two ends of the cross bar are fixedly installed on the inner sides of the two connecting seats by positioning bolts respectively, the cross bar adopts a hollow square tube structure design, and second walking wheels are rotatably installed at the bottom of the two connecting seats, and the second walking wheels at the bottom of one of the connecting seats are driven by a second drive motor.

[0011] In the above scheme, the adjustment assembly consists of two connecting seats and a cross bar, which are fixed by positioning bolts, making the distance adjustment between the base frames simple and quick. The cross bar adopts a hollow square tube structure design, which is both light and strong, providing good load-bearing capacity and stability. The second walking wheel at the bottom of the connecting seat allows the entire lifting device to be flexibly moved on the construction site.

[0012] Preferably, mounting frames are fixedly installed on both sides of the bracket, a first mounting plate and a second mounting plate are fixedly installed on the upper end surface of the bracket, a lifting motor equipped with a reducer is fixedly installed on the upper end surface of the first mounting plate, one side of the reducer is transmission-mounted with the winding roller, and the other side of the reducer is transmission-mounted with an anti-fall mechanism, the anti-fall mechanism is fixedly installed on the upper end surface of the mounting frame, and a first protective frame is fixedly installed on both the front and rear ends of the bracket.

[0013] In the above scheme, key components such as the mounting frame, mounting plate, hoisting motor, and reducer are integrated on the bracket, making the entire hoisting assembly compact and easy to operate. The transmission installation of the reducer, winding roller, and anti-fall mechanism improves the transmission efficiency and hoisting accuracy. The setting of the anti-fall mechanism provides additional safety protection and reduces the risk of falling during the hoisting process.

[0014] Preferably, the two ends of the winding roller are respectively mounted on the upper end surfaces of the first mounting plate and the second mounting plate, and the wire rope installed on the hook passes through the wire arrangement roller and is wound around the winding roller.

[0015] In the above scheme, both ends of the winding roller are mounted on the mounting plate, which makes the winding and releasing of the wire rope smoother and simplifies the operation process. The wire rope passes through the wire roller and is wound on the winding roller, which helps to keep the wire rope neat and reduce wear, thereby improving the accuracy and safety of the lifting.

[0016] Preferably, the front end of the first driving motor extends into the bracket and is driven and installed with the first walking wheel. There are four first walking wheels, which are driven and installed by a transmission shaft. The four first walking wheels are all rotatably installed with the bracket, pass through the bottom of the bracket, and move on the upper end surface of the base frame through a guide rail.

[0017] In the above scheme, the front end of the first drive motor extends into the bracket and is driven and installed with the first walking wheel. This design improves the stability of the lifting device during movement, and multiple first walking wheels are installed through the transmission shaft to ensure efficient power transmission and improve the movement efficiency of the lifting device. The design of the first walking wheel being rotatably installed with the bracket and moving on the base frame through the guide rail enables the lifting device to fine-tune the installation position of the steel box girder when in use.

[0018] Preferably, the upper end surfaces of the chassis at both ends of the guide rail are respectively fixedly mounted with limit frames, and the height of the limit frames is higher than the height at which the first traveling wheel is exposed at the bottom of the bracket.

[0019] In the above scheme, the height of the top of the limit frame is designed to be higher than the exposed height of the first traveling wheel, which provides limit protection for the lifting device to prevent the traveling wheel from moving excessively and causing the lifting components to fall off. The setting of the limit frame helps to ensure the safety of the lifting device during movement and reduce accidents caused by misoperation or accidents. The fixed installation of the limit frame enhances the overall structural integrity of the lifting device and improves the stability and reliability during the construction process.

[0020] A method for hoisting a steel box girder segment by segment, the method integrating any of the above-mentioned steel box girder segment by segment hoisting devices, further comprising the following steps:

[0021] Step 1: In the preparation stage, the steel box girder segment hoisting construction device is transported to the construction site, and assembled and adjusted according to the specific conditions of the construction site to ensure that the base is placed stably, and the distance between the two base frames is adjusted by adjusting the components to adapt to the steel box girder segments of different widths. At the same time, check whether all parts of the hoisting components are intact, especially key components such as wire ropes, hooks, winding rollers and wire-straightening rollers, to ensure that they are in good working condition;

[0022] Step 2: Inspection before hoisting. Before the formal hoisting, it is necessary to conduct a comprehensive inspection of the entire hoisting device, including the electrical system, transmission system, safety protection devices, etc. At the same time, confirm that there are no obstacles on the hoisting path and ensure the safety of the construction workers;

[0023] Step 3: Hoisting operation, start the hoisting motor and drive the winding roller to rotate through the reducer, so that the wire rope is released or rolled up from the winding roller, thereby controlling the lifting and lowering of the hook. During the hoisting process, the operator needs to pay close attention to the position and height of the hook to ensure that the steel box girder segment is lifted smoothly and slowly. At the same time, the anti-fall mechanism provides additional safety protection to prevent the hoisted object from falling due to unexpected situations;

[0024] Step 4: Move and adjust. After the steel box girder segment is hoisted, the first driving motor drives the first traveling wheel to move on the guide rail to move the steel box girder segment to the predetermined installation position. During the movement, the operator needs to remain alert and be ready to adjust the hoisting speed and direction at any time to ensure the accurate docking of the steel box girder segment.

[0025] Step 5: Installation and fixation. When the steel box girder segment reaches the predetermined position, the hook is used to slowly lower and fine-tune the steel box girder segment in coordination with the first traveling wheel, so as to accurately align and fix it. During the fixation process, the stability and safety of the steel box girder segment must be ensured to prevent safety accidents caused by improper fixation.

[0026] Step 6: Inspection and acceptance. After the installation of the steel box girder segment is completed, a comprehensive inspection and acceptance work is carried out to ensure that the installation quality and safety of the steel box girder segment meet the relevant standards and requirements. At the same time, the lifting device is cleaned and maintained to prepare for the next stage of construction.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The device of the present invention comprises a base and a hoisting assembly, wherein the base is composed of two base frames, which are movably connected by an adjustment assembly and can be adjusted according to different widths of steel box beam segments, thereby adapting to steel box beams of different sizes. This modular and adjustable design reduces the customization or adjustment work required due to size mismatch;

[0029] The hoisting assembly includes a bracket, a first drive motor, a winding roller, a wire roller and a hook. The combination of these components provides a universal hoisting solution that can be applied to steel box girder segments of different shapes and sizes. The winding roller is driven to rotate by the first drive motor to release or reel in the wire rope and control the lifting and lowering of the hook. This automated operation reduces the need for manual adjustment of the hoisting mechanism and improves construction efficiency.

[0030] During the hoisting process, an anti-fall mechanism provides additional safety protection to prevent the hoisted objects from falling due to unexpected situations. This design takes into account the safety needs in different construction environments. The first traveling wheel is installed through the transmission shaft and can move on the guide rail on the upper end face of the base frame, providing fine-tuning capability for the hoisting device to ensure the precise docking of the steel box girder segments. Through the precise three-dimensional positioning device, the horizontal, longitudinal and vertical three-dimensional positioning functions are integrated, which can simultaneously solve the problem of the difficulty in accurately positioning and joining the steel box girder and reduce the need for a large number of welding positioning code plates.

[0031] In summary, the steel box girder segmented lifting construction method and device effectively solves the problem in the prior art of requiring customization or adjustment of the lifting mechanism due to different sizes and shapes of steel box girders through modularization, automation, electrification, safety assurance, fine-tuning and precise positioning design, thereby reducing the preparation time and cost before construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the hoisting assembly of the present invention;

[0034] Figure 3 It is a schematic diagram of the bracket connection structure of the present invention;

[0035] Figure 4 It is a schematic diagram of the chassis connection structure of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the regulating component of the present invention.

[0037] Figure 6 The flowchart of the process from step 1 to step 2 of the present invention is as follows;

[0038] Figure 7 It is a workflow diagram of step 2 to step 3 of the present invention;

[0039] Figure 8 It is a work flow chart of step 3 to step 4 of the present invention;

[0040] Fig. 9 It is a work flow chart of step 4 to step 5 of the present invention;

[0041] Fig.10 It is a work flow chart of step five to step six of the present invention.

[0042] In the figure: 1. lifting assembly; 11. hook; 12. bracket; 121. first protective frame; 122. first mounting plate; 123. second mounting plate; 124. mounting frame; 125. first running wheel; 126. first drive motor; 13. lifting motor; 14. reducer; 15. anti-fall mechanism; 16. winding roller; 17. cable management roller; 2. base; 21. bottom frame; 211. limit frame; 22. adjustment assembly; 221. connecting seat; 222. cross bar; 223. second drive motor; 224. positioning bolt; 225. second running wheel; 23. guide rail; 24. slide; 241. power cord; 25. second protective frame. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Embodiment 1

[0045] like Figures 1 to 10 As shown, an embodiment of the present invention is: a steel box girder segmented lifting device, comprising a base 2, a lifting assembly 1 is movably mounted on the upper end surface of the base 2, the base 2 comprises a base frame 21, the number of the base frames 21 is two, the two ends of the two base frames 21 on opposite sides are movably connected by an adjustment assembly 22, the upper end surfaces of the two base frames 21 are fixedly mounted with a guide rail 23, and the opposite sides of the two base frames 21 are fixedly mounted with a second protective frame 25;

[0046] The lifting assembly 1 includes a bracket 12, on both sides of the rear end of the upper end surface of the bracket 12, a first drive motor 126 is fixedly installed, and winding rollers 16 are rotatably installed on both sides of the upper end surface of the bracket 12 at the front end of the first drive motor 126. A wire management roller 17 is rotatably installed on the upper end surface of the bracket 12 on the opposite side of the two winding rollers 16, and a hook 11 is suspended below the wire management roller 17 through a wire rope.

[0047] A method for hoisting a steel box girder segment by segment, the method integrating the above-mentioned steel box girder segment by segment hoisting device, further comprising the following steps:

[0048] Step 1: In the preparation stage, the steel box girder segment hoisting construction device is transported to the construction site, and assembled and adjusted according to the specific conditions of the construction site to ensure that the base 2 is placed stably, and the distance between the two base frames 21 is adjusted by adjusting the assembly 22 to adapt to steel box girder segments of different widths. At the same time, check whether all parts of the hoisting assembly 1 are intact, especially key parts such as the wire rope, hook 11, winding roller 16 and wire arrangement roller 17, to ensure that they are in good working condition;

[0049] Step 2: Inspection before hoisting. Before the formal hoisting, it is necessary to conduct a comprehensive inspection of the entire hoisting device, including the electrical system, transmission system, safety protection devices, etc. At the same time, confirm that there are no obstacles on the hoisting path and ensure the safety of the construction workers;

[0050] Step 3: Hoisting operation, start the hoisting motor 13 and drive the winding roller 16 to rotate through the reducer 14, so that the wire rope is released or rolled up from the winding roller 16, thereby controlling the lifting and lowering of the hook 11. During the hoisting process, the operator needs to pay close attention to the position and height of the hook 11 to ensure that the steel box girder segment is lifted steadily and slowly. At the same time, the anti-fall mechanism 15 provides additional safety protection to prevent the hoisted object from falling due to unexpected situations;

[0051] Step 4: Move and adjust. After the steel box girder segment is hoisted, the first driving motor 126 drives the first traveling wheel 125 to move on the guide rail 23 to move the steel box girder segment to a predetermined installation position. During the movement, the operator needs to remain alert and be ready to adjust the hoisting speed and direction at any time to ensure the accurate docking of the steel box girder segment.

[0052] Step 5: Installation and fixation. When the steel box girder segment reaches the predetermined position, the hook 11 cooperates with the first traveling wheel 125 to slowly lower and fine-tune the steel box girder segment, so as to accurately align and fix it. During the fixing process, the stability and safety of the steel box girder segment need to be ensured to prevent safety accidents caused by improper fixing.

[0053] Step 6: Inspection and acceptance. After the installation of the steel box girder segment is completed, a comprehensive inspection and acceptance work is carried out to ensure that the installation quality and safety of the steel box girder segment meet the relevant standards and requirements. At the same time, the lifting device is cleaned and maintained to prepare for the next stage of construction.

[0054] Specifically, the base 2 is composed of two base frames 21, which are movably connected by an adjustment component 22 and can be adjusted according to different widths of the steel box beam segment, so as to adapt to steel box beams of different sizes. This modular and adjustable design reduces the customization or adjustment work required due to size mismatch. The hoisting component 1 includes a bracket 12, a first drive motor 126, a winding roller 16, a wire-stripping roller 17 and a hook 11. The combination of these components provides a universal hoisting solution, which can be applied to steel box beam segments of different shapes and sizes. The winding roller 16 is driven to rotate by the first drive motor 126 to realize the release or winding of the wire rope and control the lifting and lowering of the hook 11. This automated operation reduces the need for manual adjustment of the hoisting mechanism and improves construction efficiency.

[0055] During the hoisting process, the anti-fall mechanism 15 provides additional safety protection to prevent the hoisted objects from falling due to unexpected situations. This design takes into account the safety requirements in different construction environments. The first walking wheel 125 is installed through the transmission shaft and can move on the guide rail 23 on the upper end surface of the base frame 21, providing fine-tuning capability for the hoisting device to ensure the precise docking of the steel box girder segments. Through the precise three-dimensional positioning device, the horizontal, longitudinal and vertical three-dimensional positioning functions are integrated, which can simultaneously solve the problem of difficult precise positioning and jointing of steel box girders and reduce the need for a large number of welding positioning code plates.

[0056] In summary, the segmented lifting construction method and device of the steel box girder effectively solves the problem in the prior art that the lifting mechanism needs to be customized or adjusted due to the different sizes and shapes of the steel box girders through modularization, automation, electrification, safety assurance, fine-tuning and precise positioning design, thereby reducing the preparation time and cost before construction.

[0057] Embodiment 2

[0058] In order to make the distance between the two base frames adjustable and facilitate the horizontal movement of the base, such as Figure 4 and Figure 5 As shown, an embodiment of the present invention is: a steel box girder segment lifting device. In this embodiment, slides 24 are fixedly installed on opposite sides of two base frames 21, and a power cord 241 is slidably installed on the slides 24. One end of the power cord 241 is electrically connected to the control switch, and the other end of the power cord 241 is electrically connected to the lifting component 1.

[0059] Furthermore, by fixedly installing the slide 24 on the base frame 21 and slidingly installing the power cord 241 on the slide 24, the length and position of the power cord 241 can be easily adjusted to adapt to different construction environments and operating requirements. The electrical connection design between the power cord 241 and the control switch and the lifting assembly 1 can ensure the stability and safety of the power cord 241, and reduce electrical failures and safety accidents caused by pulling or damage to the power cord 241. The slidingly installed power cord 241 is easy to inspect and maintain, which helps to promptly discover and solve problems with the power cord 241 and reduce construction interruptions.

[0060] Preferably, the adjustment assembly 22 includes two connecting seats 221 and a cross bar 222. The two ends of the cross bar 222 are fixedly installed on the inner sides of the two connecting seats 221 by positioning bolts 224 respectively. The cross bar 222 adopts a hollow square tube structure design. The bottom of the two connecting seats 221 are both rotatably installed with second walking wheels 225, and the second walking wheels 225 at the bottom of one of the connecting seats 221 are driven by a second drive motor 223.

[0061] Furthermore, the adjustment assembly 22 is composed of two connecting seats 221 and a cross bar 222, which are fixed by positioning bolts 224, so that the distance adjustment between the base frames 21 becomes simple and quick. The cross bar 222 adopts a hollow square tube structure design, which is both light and strong, and provides good load-bearing capacity and stability. The second walking wheel 225 at the bottom of the connecting seat 221 allows the entire lifting device to be flexibly moved on the construction site.

[0062] Embodiment 3

[0063] In order to allow the lifting components to move horizontally on the base, Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention is: a steel box girder segment lifting device. In this embodiment, mounting frames 124 are fixedly installed on both sides of the bracket 12, a first mounting plate 122 and a second mounting plate 123 are fixedly installed on the upper end surface of the bracket 12, a lifting motor 13 equipped with a reducer 14 is fixedly installed on the upper end surface of the first mounting plate 122, one side of the reducer 14 is transmission-mounted with a winding roller 16, and the other side of the reducer 14 is transmission-mounted with an anti-falling mechanism 15, the anti-falling mechanism 15 is fixedly installed on the upper end surface of the mounting frame 124, and the first protective frame 121 is fixedly installed on both the front and rear ends of the bracket 12.

[0064] Furthermore, the bracket 12 integrates key components such as the mounting frame 124, the mounting plate, the lifting motor 13, the reducer 14, etc., so that the entire lifting assembly 1 has a compact structure and is easy to operate. The transmission installation of the reducer 14, the winding roller 16 and the anti-fall mechanism 15 improves the transmission efficiency and lifting accuracy. The setting of the anti-fall mechanism 15 provides additional safety protection and reduces the risk of falling during the lifting process.

[0065] Preferably, both ends of the winding roller 16 are respectively mounted on the upper end surfaces of the first mounting plate 122 and the second mounting plate 123 , and the wire rope installed on the hook 11 passes through the wire arrangement roller 17 and is wound around the winding roller 16 .

[0066] Furthermore, both ends of the winding roller 16 are mounted on the mounting plate, which makes the winding and releasing of the wire rope smoother and simplifies the operation process. The wire rope passes through the wire-straightening roller 17 and is wound on the winding roller 16, which helps to keep the wire rope neat and reduce wear, thereby improving the accuracy and safety of the lifting.

[0067] Preferably, the front end of the first drive motor 126 extends into the bracket 12 and is driven and installed with the first walking wheel 125. There are four first walking wheels 125, and the four first walking wheels 125 are driven and installed through a transmission shaft. The four first walking wheels 125 are all rotatably installed with the bracket 12, pass through the bottom of the bracket 12, and move on the upper end surface of the base frame 21 through the guide rail 23.

[0068] Furthermore, the front end of the first drive motor 126 extends into the bracket 12 and is driven and installed with the first walking wheel 125. This design improves the stability of the lifting device during movement, and multiple first walking wheels 125 are installed through the transmission shaft, which ensures efficient power transmission and improves the movement efficiency of the lifting device. The design of the first walking wheel 125 being rotatably installed with the bracket 12 and moving on the base frame 21 through the guide rail 23 enables the lifting device to fine-tune the installation position of the steel box girder when in use.

[0069] Preferably, the upper end surfaces of the base frame 21 at both ends of the guide rail 23 are respectively fixedly mounted with limit frames 211 , and the height of the limit frames 211 is higher than the height at which the first running wheel 125 at the bottom of the bracket 12 is exposed.

[0070] Furthermore, the height of the top of the limit frame 211 is designed to be higher than the exposed height of the first walking wheel 125, which provides limit protection for the lifting device and prevents the lifting assembly 1 from falling off due to excessive movement of the walking wheel. The setting of the limit frame 211 helps to ensure the safety of the lifting device during movement and reduce accidents caused by misoperation or accidents. The fixed installation of the limit frame 211 enhances the overall structural integrity of the lifting device and improves the stability and reliability during the construction process.

[0071] When the present invention is used, the steel box girder segmented hoisting construction device is transported to the construction site, and assembled according to the specific conditions of the construction site, ensuring that the base 2 is placed stably, and using the adjustment component 22 to adjust the distance between the two base frames 21 to adapt to steel box girder segments of different widths, check whether the various parts of the hoisting component 1 are intact, especially the key components such as the wire rope, the hook 11, the winding roller 16 and the wire arrangement roller 17, to ensure that they are in good working condition;

[0072] Conduct a comprehensive inspection of the entire hoisting device, including the electrical system, transmission system, safety protection devices, etc., to confirm that there are no obstacles on the hoisting path and ensure the safety of construction workers;

[0073] Start the hoisting motor 13 and drive the winding roller 16 to rotate through the speed reducer 14. The release or winding of the wire rope is controlled by the rotation of the winding roller 16, thereby controlling the lifting and lowering of the hook 11. During the hoisting process, the operator needs to pay close attention to the position and height of the hook 11 to ensure that the steel box girder segment is lifted steadily and slowly. The anti-fall mechanism 15 provides additional safety protection to prevent the hoisted object from falling due to unexpected situations.

[0074] The first driving motor 126 drives the first traveling wheel 125 to move on the guide rail 23, and moves the steel box girder segment to the predetermined installation position to adjust the lifting speed and direction: during the movement, the operator needs to remain alert and be ready to adjust the lifting speed and direction at any time to ensure the accurate docking of the steel box girder segment;

[0075] When the steel box girder segment reaches the predetermined position, the hook 11 cooperates with the first traveling wheel 125 to slowly lower and fine-tune the steel box girder segment for accurate alignment and fixation. During the fixation process, the stability and safety of the steel box girder segment need to be ensured to prevent safety accidents caused by improper fixation.

[0076] After the installation of the steel box girder segment is completed, a comprehensive inspection and acceptance work is carried out to ensure that the installation quality and safety of the steel box girder segment meet the relevant standards and requirements, and the lifting equipment is cleaned and maintained to prepare for the next stage of construction.

Claims

1. A steel box girder segmented lifting device, comprising a base (2), wherein a lifting assembly (1) is movably mounted on the upper end surface of the base (2), characterized in that: The base (2) comprises a bottom frame (21), the bottom frames (21) are two in number, two ends of opposite sides of the two bottom frames (21) are movably connected via adjustment components (22), guide rails (23) are fixedly mounted on the upper end surfaces of the two bottom frames (21), and second protective frames (25) are fixedly mounted on opposite sides of the two bottom frames (21); The lifting assembly (1) comprises a bracket (12), and a first driving motor (126) is fixedly installed on both sides of the rear end of the upper end surface of the bracket (12), and winding rollers (16) are rotatably installed on both sides of the upper end surface of the bracket (12) at the front end of the first driving motor (126), and a wire-stripping roller (17) is rotatably installed on the upper end surface of the bracket (12) on the side opposite to the two winding rollers (16), and a hook (11) is suspended below the wire-stripping roller (17) by a steel wire rope.

2. A steel box girder segmented hoisting device according to claim 1, characterized in that: A slide frame (24) is fixedly mounted on one opposite side of the two base frames (21), a power line (241) is slidably mounted on the slide frame (24), one end of the power line (241) is electrically connected to a control switch, and the other end of the power line (241) is electrically connected to a hoisting assembly (1).

3. The segmented steel box girder hoisting device according to claim 1, characterized in that: The adjustment assembly (22) comprises two connecting seats (221) and a cross bar (222), the two ends of the cross bar (222) are fixedly mounted on the inner sides of the two connecting seats (221) by positioning bolts (224), the cross bar (222) adopts a hollow square tube structure design, and the bottoms of the two connecting seats (221) are both rotatably mounted with second running wheels (225), and the second running wheel (225) at the bottom of one of the connecting seats (221) is driven by a second drive motor (223).

4. The segmented steel box girder hoisting device according to claim 1, characterized in that: The bracket (12) is fixedly mounted with mounting frames (124) on both sides, a first mounting plate (122) and a second mounting plate (123) are fixedly mounted on the upper end surface of the bracket (12), a hoisting motor (13) equipped with a reducer (14) is fixedly mounted on the upper end surface of the first mounting plate (122), one side of the reducer (14) is transmission-mounted with a winding roller (16), the other side of the reducer (14) is transmission-mounted with an anti-falling mechanism (15), the anti-falling mechanism (15) is fixedly mounted on the upper end surface of the mounting frame (124), and first protective frames (121) are fixedly mounted on both front and rear ends of the bracket (12).

5. The segmented steel box girder hoisting device according to claim 1, characterized in that: The two ends of the winding roller (16) are respectively mounted on the upper end surfaces of the first mounting plate (122) and the second mounting plate (123); the steel wire rope installed on the hook (11) passes through the wire arrangement roller (17) and is wound around the winding roller (16).

6. The segmented steel box girder hoisting device according to claim 1, characterized in that: The front end of the first driving motor (126) extends into the bracket (12) and is driven and installed with a first running wheel (125). There are four first running wheels (125). The four first running wheels (125) are driven and installed via a transmission shaft. The four first running wheels (125) are all rotatably installed with the bracket (12), pass through the bottom of the bracket (12), and move on the upper end surface of the base frame (21) via a guide rail (23).

7. The segmented steel box girder hoisting device according to claim 1, characterized in that: Limiting frames (211) are fixedly mounted on the upper end surfaces of the bottom frame (21) at both ends of the guide rail (23), respectively. The height of the limiting frame (211) is higher than the height at which the first running wheel (125) at the bottom of the bracket (12) is exposed.

8. A method for hoisting a steel box girder in sections, characterized in that: The method integrates the steel box girder segmented lifting device described in claims 1 to 7, and further comprises the following steps: Step 1: In the preparation stage, the steel box girder segment hoisting construction device is transported to the construction site, and assembled and adjusted according to the specific conditions of the construction site to ensure that the base (2) is placed stably, and the distance between the two base frames (21) is adjusted by adjusting the assembly (22) to adapt to steel box girder segments of different widths. At the same time, check whether all parts of the hoisting assembly (1) are intact, especially key parts such as the wire rope, hook (11), winding roller (16) and wire arrangement roller (17), to ensure that they are in good working condition; Step 2: Inspection before hoisting. Before the formal hoisting, it is necessary to conduct a comprehensive inspection of the entire hoisting device, including the electrical system, transmission system, safety protection devices, etc. At the same time, confirm that there are no obstacles on the hoisting path and ensure the safety of the construction workers; Step 3: Hoisting operation, start the hoisting motor (13) and drive the winding roller (16) to rotate through the reducer (14), so that the wire rope is released or rolled up from the winding roller (16), thereby controlling the lifting and lowering of the hook (11). During the hoisting process, the operator needs to pay close attention to the position and height of the hook (11) to ensure that the steel box girder segment is lifted smoothly and slowly. At the same time, the anti-fall mechanism (15) provides additional safety protection to prevent the hoisted object from falling due to unexpected circumstances; Step 4: moving and adjusting. After the steel box girder segment is hoisted, the first driving motor (126) drives the first running wheel (125) to move on the guide rail (23) to move the steel box girder segment to a predetermined installation position. During the moving process, the operator needs to remain alert and be ready to adjust the hoisting speed and direction at any time to ensure the accurate docking of the steel box girder segment. Step 5: installation and fixing. When the steel box girder segment reaches the predetermined position, the hook (11) cooperates with the first running wheel (125) to slowly lower and fine-tune the steel box girder segment, so as to accurately align and fix it. During the fixing process, the stability and safety of the steel box girder segment need to be ensured to prevent safety accidents caused by improper fixing. Step 6: Inspection and acceptance. After the installation of the steel box girder segment is completed, a comprehensive inspection and acceptance work is carried out to ensure that the installation quality and safety of the steel box girder segment meet the relevant standards and requirements. At the same time, the lifting device is cleaned and maintained to prepare for the next stage of construction.

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