Movable mast crane suitable for hoisting corrugated steel bridge deck slab
By designing a mobile mast crane suitable for corrugated steel bridge decks, the efficiency and safety issues of existing equipment in the hoisting of new bridges have been solved, enabling efficient and flexible hoisting operations and promoting the prefabrication and intelligentization of bridge construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-11
- Publication Date
- 2026-04-07
AI Technical Summary
Existing mast cranes are not suitable for hoisting corrugated steel plates on new steel structure bridges, resulting in low hoisting efficiency and poor safety, especially in the narrow space of the bridge deck where they lack flexibility and adaptability.
A mobile mast crane was designed, including a base frame foundation, a slewing device, a lifting frame system and a boom. It uses traveling wheels to travel on corrugated steel plate tracks, and combines a winch and guide wheels to achieve flexibility and precision in lifting operations. Remote control operation is achieved through an electrical system.
It enables large-scale hoisting and rapid continuous hoisting, improving construction efficiency, reducing costs and safety risks. It is suitable for the efficient hoisting of corrugated steel bridge decks and promotes the prefabrication and intelligentization of bridge construction.
Smart Images
Figure CN224091524U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cranes, specifically a movable mast crane suitable for hoisting corrugated steel bridge decks. Background Technology
[0002] With the continuous development of intelligent and prefabricated bridge construction, steel-concrete composite structure bridges are being gradually promoted and applied due to their efficient and rapid construction characteristics, solving the pollution and traffic interference problems caused by long-term construction of bridges in urban areas. However, reliable construction technology and matching construction equipment have not yet been formed for this new type of bridge structure. Existing hoisting equipment cannot solve the problems of efficiency and safety in the installation of existing bridge decks. At the same time, mast cranes are mostly used in fixed scenarios such as ground or docks, fixed to the ground by anchor bolts, and some can move short distances. However, existing technologies still have many challenges in hoisting applications for steel structure bridges. The new type of steel-concrete composite structure bridge consists of closely spaced H-shaped steel main beams and corrugated steel plates to form a continuous bridge deck structure. During construction, after the H-shaped steel beams are installed, a large amount of bridge deck corrugated steel plate hoisting work will begin. Using cranes to install each piece piece by piece for a long time is not only inefficient, but also may not be able to meet the crane positioning requirements due to insufficient space at the bottom, and also poses significant economic and safety problems. Specifically: (1) Existing mast cranes are relatively fixed, and their lifting range in a certain height and horizontal direction is limited. Their application scenarios are relatively fixed and single, and they cannot achieve the functions of long-distance travel and large-scale lifting. (2) Existing mast cranes cannot handle the travel and lifting of the corrugated steel plate surface of bridges, and cannot be adapted to the lifting of corrugated steel plates of new composite structure bridges, which poses safety risks during construction. Utility Model Content
[0003] Therefore, in view of the above-mentioned shortcomings, this utility model provides a movable mast crane suitable for hoisting corrugated steel bridge decks. It can move freely on the steel rails on the corrugated steel plate, realizing a larger bridge deck hoisting coverage and continuous and rapid hoisting, expanding the construction work surface, improving construction efficiency, providing reference engineering experience for rapid assembly construction, and improving economic benefits.
[0004] This utility model is implemented by constructing a movable mast crane suitable for hoisting corrugated steel bridge decks; the crane consists of a base frame foundation, a slewing device, a hoisting frame system, a counterweight box, and a boom;
[0005] The base frame foundation is composed of a frame system of rectangular steel pipes and I-beams, and is equipped with wheels. These wheels support the structure on a track, allowing the structure to move along the track. The track consists of two longitudinally laid H-beams, spot-welded to the top surface of a corrugated steel plate.
[0006] A slewing device is installed in the middle of the base frame foundation to ensure the rotation of the top hoisting system. Above the slewing device is the hoisting frame system and a circular column. Behind the hoisting frame structure is a counterweight box, which contains weights to balance the load transmitted by the object being hoisted in front.
[0007] The boom is welded from steel components, and a rotating shaft at the bottom of the boom connects it to the lifting frame system. During operation, the lifting work area is moved by rotating the boom.
[0008] Winches No. 1 and No. 2 are installed on the hoisting frame system. Winch No. 1 (9-1) controls the lifting of the hook via a hoisting rope, and winch No. 2 controls the lifting of the boom via a hoisting rope.
[0009] Furthermore, the base frame foundation consists of bottom support columns and a frame body. The frame body comprises side columns, center columns, upper crossbeams, lower crossbeams, upper longitudinal beams, lower longitudinal beams, and center crossbeams. All center columns are constructed of rectangular steel tubing, while the crossbeams and longitudinal beams are made of I-beams, welded together to form the frame body. The base frame foundation operates in both traveling and hoisting modes. During traveling, the bottom support columns are retracted, and the crane moves along the travel track. During hoisting, the bottom support columns are lowered and supported on the crests of the welded and fixed corrugated steel plates of the bridge deck. The bottom support columns are rectangular tubes embedded within the corresponding support tubes of the frame body, and are manually extended and retracted via pin bolts.
[0010] Furthermore, the counterweight box is constructed by welding steel plates.
[0011] Furthermore, lifting control guide wheels and boom control guide wheels are installed on the top of the boom, and the force is redirected through the wire rope to complete the lifting and boom raising and lowering.
[0012] Furthermore, the traveling rails are reused repeatedly after the crane has traveled, and the top and bottom plates of the rail profiles are perpendicular to the corrugated steel plates, with a spacing greater than the width of a single tire.
[0013] Furthermore, the traveling wheels consist of four inflatable rubber tires, which bear the weight of the crane device and complete long-distance longitudinal displacement when traveling. By adjusting the track travel offset, the lateral movement distance can be finely adjusted to adjust the working range of the crane.
[0014] Furthermore, a lower support rubber pad is installed at the lower end of the bottom support column to protect the corrugated steel plate.
[0015] Furthermore, the upper hoisting frame system is welded from longitudinal and transverse rectangular steel beams, with a circular column on the rotation axis, supported by the slewing device. A-frames are provided on both sides of the circular column as diagonal braces, and the upper hoisting frame structure rotates with the hoisting operation.
[0016] Furthermore, a guide device is also installed at the top of the cylindrical column to serve as a transition point for the force system.
[0017] This utility model has the following advantages: (1) The steel track on the corrugated steel plate moves freely, realizing a larger bridge deck hoisting radiation range and continuous and rapid hoisting. The structure is novel, the cost is low, and the flexibility is high. It is suitable for hoisting corrugated steel plates in various parts of the bridge deck. (2) On-site assembly is convenient and workers can operate it easily, which greatly reduces the construction cost. (3) It provides a more convenient and efficient construction mode for the hoisting of steel-concrete composite bridge decks, promotes the assembly and intelligent construction process of steel structure bridge deck hoisting, and effectively improves the construction efficiency. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the implementation structure of the crane described in this application.
[0019] The components include: 1. Traveling track; 2. Traveling wheels; 3-1. Bottom support column; 3-2. Side column; 3-3. Middle column; 3-4. Upper crossbeam; 3-5. Lower crossbeam; 3-6. Upper longitudinal beam; 3-7. Lower longitudinal beam; 3-8. Middle crossbeam; 3-9. Lower support rubber pad; 4. Rotation device; 5-1. Longitudinal beam rectangular steel; 5-2. Crossbeam rectangular steel; 5-3. Round column; 6. A-frame; 7. Counterweight box; 8. Boom; 9-1. No. 1 winch; 9-2. No. 2 winch; 10-1. Lifting control guide wheel; 10-2. Boom control guide wheel; 10-3. Guiding device; 12. Corrugated steel plate; 13. Electrical system. Detailed Implementation
[0020] The following will be combined with the appendix Figure 1 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0021] In this embodiment, the present invention provides a movable mast crane suitable for hoisting corrugated steel bridge decks, such as... Figure 1 As shown, it can be implemented in the following manner; the crane consists of a base frame foundation, a slewing device 4, a lifting frame system, a counterweight box, and a boom 8;
[0022] The base frame foundation is composed of a frame system of rectangular steel pipes and I-beams, and the base frame foundation is equipped with traveling wheels 2. The traveling wheels 2 support the traveling track 1 and can travel along the traveling track 1. The traveling track 1 is two longitudinally laid H-beams, which are spot-welded to the top surface of the corrugated steel plate 12.
[0023] A slewing device 4 is set in the middle of the base frame foundation (the slewing device 4 can be a conventional gear turntable component, which is used in this system and meshes with the small gear turntable driven by the motor to form a rotation system) to ensure the rotation of the top hoisting system. A hoisting frame system and a round column 5-3 are set above the slewing device 4. Behind the hoisting frame structure is a counterweight box 7, which contains heavy objects to balance the load transmitted by the object hoisted in front.
[0024] The boom 8 is welded from steel components. A rotating shaft at the bottom of the boom 8 connects it to the lifting frame system. During operation, the lifting work area is moved by rotating the boom.
[0025] The hoisting frame system is equipped with winch 1 (9-1) and winch 2 (9-2). Winch 1 (9-1) controls the lifting of hook 11 via a hoisting rope, and winch 2 (9-2) controls the lifting of boom 8 via a hoisting rope.
[0026] like Figure 1 As shown, in this embodiment, the base frame foundation consists of bottom support column 3-1 and a frame body. The frame body consists of side columns 3-2, middle columns 3-3, upper crossbeam 3-4, lower crossbeam 3-5, upper longitudinal beam 3-6, lower longitudinal beam 3-7, and middle crossbeam 3-8. All the columns in the frame body are made of rectangular steel pipes, and the horizontal and vertical beams are all made of I-beams, which are welded together to form the frame body. The base frame foundation has two modes: a traveling mode and a hoisting mode. During traveling, the bottom support column 3-1 is retracted, and the crane moves along the traveling track 1. During hoisting, the bottom support column 3-1 is lowered and supported on the crests of the welded and fixed bridge deck corrugated steel plate 12. The bottom support column 3-1 is a telescopic structure, but it is not electrically / automatically telescopic. The bottom support column 3-1 is a rectangular tube, embedded in the corresponding support leg rectangular tube of the frame body, and is manually telescopic via pin bolts. The extended state is the hoisting state, used for hoisting the load-bearing outriggers and unloading the load on the traveling wheels. The retracted state is the traveling state, in which the outriggers are not under load.
[0027] like Figure 1 As shown, in this embodiment, the counterweight box 7 is assembled by welding steel plates. The top of the boom 8 is equipped with a lifting control guide wheel 10-1 and a boom control guide wheel 10-2, which use wire ropes to redirect force and complete the lifting and boom raising / lowering. Both the lifting control guide wheel 10-1 and the boom control guide wheel 10-2 are rollers wound with wire ropes. The lifting control guide wheel is a fixed pulley, changing the direction of force on the wire rope. Boom control changes the boom's rising and falling by tightening and loosening the wire rope wound around the rollers.
[0028] like Figure 1 As shown, in this embodiment, the traveling track 1 is reused repeatedly after the crane travels. The top and bottom plates of the track steel are perpendicular to the corrugated steel plate 12, and the spacing is greater than the width of a single tire.
[0029] like Figure 1 As shown, in this embodiment, the traveling wheel 2 consists of four inflatable rubber tires. When traveling, it bears the weight of the crane device and completes long-distance longitudinal displacement. By adjusting the track travel offset, the lateral movement distance can be finely adjusted to adjust the working range of the crane.
[0030] like Figure 1 As shown, in this embodiment, a lower support rubber pad 3-9 is provided at the lower end of the bottom support column 3-1 to protect the corrugated steel plate 12.
[0031] like Figure 1 As shown, in this embodiment, the upper hoisting frame system is welded from longitudinal beams 5-1 and transverse beams 5-2. A circular column 5-3 is located on the rotation axis and is supported on the slewing device 4. A-frames 6 are provided on both sides of the circular column 5-3 as diagonal braces. The upper hoisting frame structure rotates with the hoisting operation.
[0032] like Figure 1 As shown, in this embodiment, a guide device 10-3 is also provided at the top of the circular column 5-3 as a conversion point of the force system. The guide device 10-3 is a pin-type roller that rotates around the pin to guide the wire rope, and is a roller wheel for winding the wire rope.
[0033] The components of this application will be further explained in detail below:
[0034] The traveling track 1 consists of two longitudinally laid H-beams, spot-welded to the top surface of the corrugated steel plate. The track is reused repeatedly after the crane travels. The top and bottom plates of the track steel are perpendicular to the corrugated plate, and the spacing is greater than the width of a single tire.
[0035] The traveling wheel 2 consists of four inflatable rubber tires. When traveling, it bears the weight of the crane device and completes long-distance longitudinal displacement. By adjusting the track travel offset, the lateral movement distance can be finely adjusted to adjust the working range of the crane.
[0036] The base foundation consists of a frame system composed of rectangular steel pipes and I-beams. The base foundation has two modes: a traveling mode and a hoisting mode. During traveling, the bottom support columns 3-1 are retracted, and the crane moves along the tracks. During hoisting, the support legs are lowered to support the crests of the welded and fixed corrugated bridge deck panels. Rubber pads 3-8 are placed under the support legs during hoisting to protect the corrugated steel plates.
[0037] A slewing device 4 is installed in the middle of the base frame foundation to ensure the rotation of the top hoisting system.
[0038] The upper hoisting frame system is welded from longitudinal rectangular steel beams 5-1 and transverse rectangular steel beams 5-2. A circular column 5-3 is located on the central axis of rotation, supported by the slewing device 4. A-frames 6 serve as diagonal braces on both sides of the circular column 5-3. The upper hoisting frame structure rotates during the hoisting operation. Behind the hoisting frame structure is a counterweight box 7, constructed from welded steel plates, containing weights to balance the load transmitted from the object being hoisted in front.
[0039] The front boom 8 is welded from steel components, with a rotating shaft at the bottom connecting to the lifting frame system. During operation, the lifting work area is moved by rotating the boom. Winch 1 (9-1) controls the hoisting rope raising and lowering, winch 2 (9-2) controls the boom raising and lowering, and the slewing device controls rotation; all are integrated into the electrical system, allowing for human-machine interaction via remote control. The top of boom 8 is equipped with lifting control guide wheels 10-1 and 10-2, which use wire ropes to redirect force, completing the lifting and boom raising / lowering. A guide device 10-3 is also installed at the top of the circular column 5-3, serving as a force transfer point.
[0040] This utility model is applicable to a mobile mast crane for hoisting corrugated steel bridge decks. Its specific implementation process focuses on the on-site hoisting construction of corrugated steel bridge decks for large-span steel structures. For the paving and hoisting operations of steel-concrete composite bridge decks and steel-UHPC composite bridge decks, it is implemented in the following stages:
[0041] (I) Pre-construction preparation and track layout
[0042] Precast component fabrication: Based on the bridge design parameters, the weight of a single corrugated steel plate, the hoisting operation radius, and the longitudinal construction range, the core parameters such as the crane's rated lifting capacity, travel distance, and structural dimensions are determined. All components are then prefabricated in a standardized manner in the factory. Precast components include rectangular steel pipe columns for the base frame foundation, I-beams, slewing devices, rectangular steel components for the hoisting frame system, counterweight boxes, welded booms, winches, inflatable rubber wheels, and various guide wheels. All components, after passing quality inspection, are transported to the construction site.
[0043] Standardized layout of the walking track: On the top surface of the corrugated steel plate of the benchmark section that has been welded and fixed, two longitudinal H-beams are laid as walking tracks. The top and bottom plates of the track steel are laid perpendicular to the corrugated steel plate. The distance between the two tracks is greater than the width of a single walking tire to ensure smooth passage of the walking wheels. The tracks are temporarily fixed to the crest of the corrugated steel plate by spot welding, which not only avoids track deviation during operation, but also facilitates quick dismantling and allows for repeated use of the tracks.
[0044] (II) On-site assembly and commissioning of the crane
[0045] Base frame foundation assembly: On the pre-laid walking track, the base frame foundation is welded and assembled on-site. Rectangular steel pipes are used to construct the bottom support legs, side columns, and center columns. I-beams are used to construct the upper crossbeam, lower crossbeam, upper longitudinal beam, lower longitudinal beam, and center crossbeam. All components are welded together to form an integrated frame system. Four sets of inflatable rubber tires are installed at the bottom of the base frame corresponding to the walking track positions, ensuring complete contact between the tires and the top surface of the track for smooth longitudinal movement along the track. Rubber pads are fixedly installed at the lower end of each set of bottom support legs to prevent hard contact damage to the corrugated steel plate base material and anti-corrosion coating during hoisting operations.
[0046] Installation of the slewing device and superstructure: The slewing device is fixedly installed at the center of the base frame foundation, with the rotating end of the slewing device facing upwards; above the rotating end of the slewing device, a hoisting frame system and a circular column are installed. The hoisting frame system is formed by welding longitudinal and transverse rectangular steel beams. The circular column is located at the rotation axis and is fixedly supported on the slewing device at the bottom. A-frame diagonal braces are welded on both sides of the circular column to enhance the overall stability of the superstructure; a counterweight box formed by welding steel plates is fixedly installed at the rear end of the hoisting frame system. The counterweight block of corresponding weight is configured according to the rated lifting capacity of the crane to balance the overturning moment generated by the front hoisting load during hoisting operations.
[0047] Installation of the boom and winch control system: The bottom of the prefabricated and welded steel boom is hinged to the front end of the lifting frame system via a rotating shaft, enabling the boom to tilt and rotate, thus adjusting the lifting range. Winches No. 1 and No. 2 are fixedly installed on the lifting frame system. The wire rope of winch No. 1 passes through the guide device at the top of the round column and the lifting control guide wheel at the top of the boom, and then connects to the lifting hook at its end to control the lifting and lowering of the hook and the lifting components. The wire rope of winch No. 2 passes through the guide device at the top of the round column and the boom control guide wheel at the top of the boom, and then is fixed to the front end of the boom at its end to control the tilt angle adjustment of the boom.
[0048] System integration and commissioning: Integrate the winch drive system, slewing device rotation system, and traveling wheel drive system into an integrated electrical control system, and complete the wiring and debugging of the remote control human-machine interaction system; test the longitudinal bridge travel performance of the traveling wheels, the 360° rotation accuracy of the slewing device, the lifting control stability of the two winches, and the retraction and extension function of the bottom support column, and test the limit protection, overload protection and other safety devices simultaneously. After the whole machine is successfully commissioned, it will enter the formal hoisting operation stage.
[0049] (III) Implementation of hoisting operations
[0050] Work position and mode switching: The traveling wheels are controlled by the remote control system to move the crane along the longitudinal direction of the traveling track to the target lifting position; if it is necessary to fine-tune the lateral working range, it can be achieved by adjusting the lateral offset of the traveling track; after the crane is in place, the four sets of bottom support columns of the base frame foundation are lowered simultaneously, so that the bottom rubber pads are fully supported on the crest of the welded and fixed corrugated steel plate, and the traveling wheels are lifted off the traveling track to complete the switch of the crane from traveling mode to lifting mode, ensuring the overturning stability of the overall structure during lifting operations.
[0051] Precision hoisting operation: The No. 2 winch is controlled via remote control to wind up and unwind the wire rope, and the boom pitch angle is adjusted so that the hook is precisely positioned above the corrugated steel plate to be hoisted; the No. 1 winch is controlled to lower the hook, and after the operators complete the component fastening and safety inspection, the No. 1 winch is started to lift the component to the predetermined safe height; the upper hoisting frame system is controlled to rotate as a whole through the slewing device, and with the fine adjustment of the boom pitch angle, the corrugated steel plate is precisely transferred to the designed installation position to complete the component alignment, temporary fixing and welding operations; after the hoisting of a single component is completed, the above process is repeated to complete the hoisting operation of all corrugated steel bridge panels within the range of that work position.
[0052] (iv) Recycling and final dismantling
[0053] Longitudinal bridge cyclic operation: After all the single-station hoisting operations are completed, the four sets of bottom support columns are retracted simultaneously, so that the traveling wheels fall back onto the traveling track. Switch to traveling mode and control the crane to move along the track longitudinally to the next hoisting station. Repeat the above hoisting operation process to complete the hoisting operation of the corrugated steel bridge deck in the longitudinal direction of the entire bridge.
[0054] Track recycling: When the crane travels to the end of the currently laid track, the spot welding fixing point between the track and the corrugated steel plate is removed, and the track is moved forward to the next construction section. It is then re-laid and spot-welded according to the layout standard, so as to realize the recycling and reuse of the track until all the corrugated steel bridge deck hoisting operations of the entire bridge are completed.
[0055] Complete dismantling and reuse: After the entire bridge hoisting operation is completed, the hoisting wire rope, boom, winch system, upper hoisting frame, slewing device, base frame and traveling rail are dismantled in the reverse order of assembly. After cleaning, maintenance and repair of all components, they are transferred to the next construction project for reuse.
[0056] II. A description of the social benefits obtained from the implementation of this application.
[0057] (I) The implementation of this utility model overcomes the industry pain points of traditional large-scale hoisting equipment, such as poor flexibility in operation in the narrow space of bridge decks, limited operating radius, and insufficient adaptability to bridge deck structures. It innovatively develops a special mobile mast crane adapted for the construction of corrugated steel bridge decks, filling the technological gap in special hoisting equipment for corrugated steel bridge decks. This equipment realizes precise, efficient, and fully controllable operation of bridge deck hoisting, significantly improving the construction technology level of new bridge structures such as steel-concrete composite bridge decks and steel-UHPC composite bridge decks. It promotes the prefabricated and intelligent construction process of steel structure bridges and provides reliable technical support for the high-quality construction of long-span steel structure bridges, urban elevated roads, and cross-river and cross-sea bridges.
[0058] (II) The crane of this utility model adopts a standardized prefabrication model in the factory and rapid on-site assembly. The main components are mainly made of conventional steel and steel plate welding. The structural design is simple and novel. Compared with traditional large truck cranes and crawler cranes, the equipment manufacturing cost is significantly reduced, and there is no need to bear the high entry and exit fees and long-term rental fees of large equipment. The entire equipment and the traveling rail can be reused repeatedly in multiple projects and throughout the entire process, which greatly reduces the investment and waste of temporary consumables. At the same time, the equipment is easy to operate, and human-machine interaction is realized through remote control, which reduces the number of on-site workers required and the labor intensity, and significantly shortens the construction cycle of bridge deck hoisting. It effectively reduces the labor cost, time cost and management cost of the project, improves the economic benefits of bridge construction, and provides a replicable and scalable effective path for construction companies to reduce costs and increase efficiency.
[0059] (III) This utility model has undergone specific safety optimization for high-altitude bridge operations. In the hoisting mode, multiple sets of bottom support columns support the corrugated steel plate crests, and with the rear counterweight balancing system, the overall structure has excellent anti-overturning performance, fundamentally avoiding the risk of instability of large hoisting equipment when operating on the bridge deck. The traveling wheels use pneumatic rubber tires, and with the rubber pads at the bottom of the support legs, hard contact with the corrugated steel plate base material and anti-corrosion layer is avoided throughout the process, effectively ensuring the construction quality and structural durability of the bridge deck. At the same time, the equipment achieves precise and controllable hoisting operations through an integrated electrical control system and remote control operation. Operators can stay away from the hoisting danger zone, greatly reducing the safety risks of high-altitude operations and component hoisting, reducing the probability of construction safety accidents, and effectively safeguarding the bottom line of construction safety and quality of transportation infrastructure projects that benefit the people.
[0060] (iv) This utility model fully meets the requirements of green and low-carbon development in the construction industry. The main body of the equipment is made of recyclable steel, and all components can be reused for multiple projects. The walking track can be cyclically laid out and used. Compared with traditional temporary hoisting supports and fixed hoisting equipment, it significantly reduces the waste of steel materials and the generation of construction waste. At the same time, the equipment is electrically driven, eliminating the need for large-scale fuel-powered machinery, which greatly reduces fuel consumption, carbon emissions, and noise pollution at the construction site and improves the construction environment for bridge deck operations. In addition, the improved construction efficiency of the equipment significantly shortens the overall construction cycle of the project, further reducing resource consumption and environmental impact during the construction process.
[0061] (V) The implementation of this utility model has formed a complete construction method for the hoisting of corrugated steel bridge decks, characterized by "factory prefabrication, on-site standardized assembly, and streamlined operation." This changes the traditional industry status quo of bridge deck hoisting, which relies on large equipment, has non-standardized operation processes, and faces significant challenges in quality control. It promotes the standardization, normalization, and professionalization of bridge hoisting construction. Furthermore, the equipment has a low operating threshold; operators can become proficient after simple system training. Combined with a remote-controlled human-machine interaction mode, it significantly improves the working environment for industrial workers and reduces the intensity of physical labor.
[0062] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A movable mast crane suitable for hoisting corrugated steel bridge decks, characterized in that... ； The crane consists of a base frame foundation, a slewing device, a lifting frame system, a counterweight box, and a boom; The base frame foundation is composed of a frame system of rectangular steel pipes and I-beams, and is equipped with wheels. These wheels support the structure on a track, allowing the structure to move along the track. The track consists of two longitudinally laid H-beams, spot-welded to the top surface of a corrugated steel plate. A slewing device is installed in the middle of the base frame foundation to ensure the rotation of the top hoisting system. Above the slewing device is the hoisting frame system and a circular column. Behind the hoisting frame structure is a counterweight box, which contains weights to balance the load transmitted by the object being hoisted in front. The boom is welded from steel components, and a rotating shaft at the bottom of the boom connects it to the lifting frame system. During operation, the lifting work area is moved by rotating the boom. Winches No. 1 and No. 2 are installed on the hoisting frame system. Winch No. 1 controls the lifting of the hook via a hoisting rope, and winch No. 2 controls the lifting of the boom via a hoisting rope.
2. The movable mast crane for hoisting corrugated steel bridge decks according to claim 1, characterized in that; The base frame foundation consists of bottom support columns and a frame body. The frame body consists of side columns, middle columns, upper crossbeams, lower crossbeams, upper longitudinal beams, lower longitudinal beams, and middle crossbeams. All the middle columns of the frame body are made of rectangular steel pipes, and the horizontal and vertical beams are all made of I-beams, which are welded together to form the frame body. The bottom support columns are rectangular tubes, which are embedded in the corresponding support rectangular tubes of the frame body and are manually extended and retracted by pin bolts.
3. The movable mast crane for hoisting corrugated steel bridge decks according to claim 1, characterized in that; The counterweight box is assembled by welding steel plates.
4. A movable mast crane suitable for hoisting corrugated steel bridge decks according to claim 1, characterized in that... ； The top of the boom is equipped with lifting control guide wheels and boom control guide wheels. The force is redirected through steel wire ropes to complete the lifting and boom raising and lowering.
5. A movable mast crane suitable for hoisting corrugated steel bridge decks according to claim 1, characterized in that; The traveling rail is reused repeatedly after the crane travels. The top and bottom plates of the rail profile are perpendicular to the corrugated steel plate, and the spacing is greater than the width of a single tire.
6. A movable mast crane suitable for hoisting corrugated steel bridge decks according to claim 1, characterized in that; The traveling wheels consist of four inflatable rubber tires. When traveling, they bear the weight of the crane and complete long-distance longitudinal displacement. By adjusting the track travel offset, the lateral movement distance can be finely adjusted to adjust the working range of the crane.
7. A movable mast crane suitable for hoisting corrugated steel bridge decks according to claim 1, characterized in that; The lower end of the bottom support column is equipped with a lower support rubber pad to protect the corrugated steel plate.
8. A movable mast crane suitable for hoisting corrugated steel bridge decks according to claim 1, characterized in that; The upper hoisting frame system is welded from longitudinal and transverse rectangular steel beams. A circular column is located on the central axis of rotation and is supported on the slewing device. A-frames are installed on both sides of the circular column as diagonal braces. The upper hoisting frame structure rotates with the hoisting operation.
9. A movable mast crane suitable for hoisting corrugated steel bridge decks according to claim 1, characterized in that... ； A guide device is installed at the top of the cylindrical column to serve as a transition point for the force system.