Foldable mobile lifting type high-altitude construction platform applied to beam region of bridge

Abstract

This utility model discloses a foldable, mobile, and lifting high-altitude construction platform for use in the crossbeam area of ​​bridges. It consists of a supporting crossbeam, a lifting system, a safety system, and a working platform. The supporting crossbeam is made of U-shaped square steel, equipped with a Z-shaped storage handle and a 360° rotating trolley for convenient handling and fine-tuning of the horizontal position. The lifting system uses a motor-driven steel wire rope to move the platform vertically. The safety system includes a safety steel wire rope, a safety device, and a counterweight, which can quickly lock and protect the platform in case of imbalance. The working platform consists of uprights, crossbars, and foldable diagonal braces, with a fall-prevention net suspended at the bottom to form a closed safety space. This utility model discloses a construction platform that requires no large equipment, is easy to install and store, and allows for precise adjustment of the working position. It effectively solves the problems of suspended working surfaces and high safety risks associated with working on high-altitude crossbeams, significantly improving construction safety and efficiency, and is suitable for the complex working environment of bridges.

Description

Technical Field

[0001] This utility model relates to the field of bridge pier top crossbeam construction technology, specifically a foldable, mobile, and lifting high-altitude construction platform applied to the crossbeam area of ​​a bridge. Background Technology

[0002] During the construction, inspection, maintenance, or painting of bridges, high-altitude operations are frequently required in the central crossbeam area within the structure. The central crossbeam is typically located in the middle of the structure, connecting the main beams on both sides. Its high position, complex surrounding space, and the presence of suspended structures or obstacles below pose significant challenges to the safety of construction workers.

[0003] Currently, the following traditional methods are commonly used for operations in this type of crossbeam area: 1. Using mobile aerial work platforms / articulated boom lifts: Suitable for scenarios where ground conditions permit and the working height is within the equipment's range. However, for areas located deep inside structures, with equipment below, or in spaces with limited space, large equipment is often difficult to reach or accurately position. Equipment rental costs are high, and flexibility is limited.

[0004] 2. On-site fabrication of a makeshift suspended platform: For convenience, a cage-like suspended platform was hastily welded from scrap steel bars. This platform was crudely made, its quality is unknown, and it was not designed or calculated, posing a significant safety hazard. The platform's overall weight is too light, making it prone to swaying in wind, resulting in poor stability. Furthermore, it was not installed and operated by qualified personnel.

[0005] 3. Makeshift temporary platforms: such as laying planks directly on beams or erecting small supports. This method is the least safe, lacking standardized guardrails and kickboards. The platform's load-bearing capacity and stability cannot be guaranteed, posing an extremely high risk of workers falling and failing to meet modern safety construction standards.

[0006] However, the aforementioned existing technologies still have the following problems and shortcomings: 1. Poor adaptability: Existing equipment (such as aerial work platforms) is difficult to adapt to the complex internal structure and limited space of the middle crossbeam operation environment.

[0007] 2. Insufficient safety: The simple suspended platform is extremely risky; there are also safety hazards when the aerial work vehicle is operated in complex environments; the simple suspended platform itself is relatively light, and its stability depends on the suspension point and is easily affected by wind load.

[0008] 3. Poor flexibility: It is difficult to quickly move the middle crossbeam between different positions.

[0009] 4. High cost: Labor and high-altitude work equipment rental costs are high. Summary of the Invention

[0010] The technical problem to be solved by this utility model is to provide a foldable, mobile, and lifting high-altitude construction platform for use in the crossbeam area of ​​bridges. It can solve the problem of suspended working surfaces and high construction safety risks in high-altitude work areas such as crossbeams and mid-span diaphragms in bridge construction. At the same time, it provides workers with safe access and stable space, which can improve the efficiency of steel bar and formwork installation. It can also adjust the construction position locally to avoid frequent up-and-down movements, thereby reducing operational risks and improving construction efficiency.

[0011] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a foldable, mobile, and lifting high-altitude construction platform applied to the crossbeam area of ​​a bridge, including a supporting crossbeam, a lifting system, a safety system, and a working platform; The support beam is connected to the lifting system and the work platform respectively via composite pins; The safety system and the work platform are connected by a composite pin and welding method.

[0012] In a preferred embodiment, the supporting beam includes a U-shaped square steel bar, a Z-shaped storage handle, a walking trolley, and a U-shaped movable component; The zigzag storage handle is fixedly connected to the U-shaped square steel with screws; The trolley is fixed to the U-shaped square steel by welding through the trolley base; The U-shaped movable component is movably connected to the U-shaped square steel through a composite pin.

[0013] In a preferred embodiment, the traveling trolley includes a trolley base, a rotary bearing, a wheel base, a wheel hub, a tire, and a brake. The trolley base is welded to the bottom of the U-shaped square steel; The rotary bearing is fitted between the trolley base and the wheel base, and the rotary bearing contains steel balls to assist the trolley in rotating in place. The wheel hub is embedded inside the tire and mounted on the wheel base via bearings; The brake is synchronously mounted on the wheel base via bearings.

[0014] In a preferred embodiment, the lifting system includes a working wire rope, a locking buckle, and a lifting motor; The working steel wire rope is suspended on the composite pin shaft, and its end is folded and fastened by a lock. The working wire rope passes through the safety device roller and is connected to the lifting motor, which drives the lifting of the work platform.

[0015] In a preferred embodiment, the safety system includes a safety wire rope, a safety device body, a safety device roller, and a safety counterweight; The safety wire rope is suspended on the composite pin shaft, and its end is folded and secured by a lock, and then connected to the lifting motor. A safety weight is suspended at the end of the safety wire rope to keep it taut.

[0016] In a preferred embodiment, the safety device body is equipped with a safety device roller, which is composed of two types of pulleys assembled sequentially with nuts. The double-wheel structure enables the limiting and transmission functions of the working wire rope. The safety device body has a narrow gap as a safety device trigger limit.

[0017] In a preferred embodiment, the work platform includes platform uprights, fixed crossbars, movable crossbars, a safety net to prevent falls, a platform base plate, a two-way composite pin shaft, and foldable diagonal bracing. The platform base plate is connected to four platform uprights via two bidirectional composite pins. Each movable surface of the work platform is movably connected to the platform uprights via three movable crossbars through composite pins, and the two lower parallel movable crossbars of the movable surface are arranged opposite each other through foldable diagonal braces. Safety nets are suspended around the bottom of the last layer of the work platform to prevent falls.

[0018] In a preferred embodiment, the foldable diagonal brace includes a folding rod, a folding bearing, and a sliding fastener; The two folding rods are connected by a folding bearing to form a foldable diagonal brace body; The folding rod is equipped with a sliding fastener.

[0019] In a preferred embodiment, the composite pin includes a pin body, a hexagonal nut, a force-saving nut, and a limiting cotter pin; After the main body of the pin is installed to the corresponding position, the hexagonal nut and the labor-saving nut are screwed onto the main body of the pin in sequence. The limiting cotter pin is installed in the reserved hole at the tail of the pin body.

[0020] The foldable, movable, and lifting high-altitude construction platform provided by this utility model, applicable to the crossbeam area of ​​a bridge, has the following beneficial effects by adopting the above structure: (1) Safety nets are suspended around the bottom of the work platform. Combined with the horizontal bar protection structure of the fixed and movable surfaces, a closed safety work space is formed to effectively prevent personnel or tools from falling. In addition, the safety weights suspended in the safety system ensure that the safety wire rope is always taut. Combined with the trigger limit structure of the main body of the safety device, the safety wire rope can be quickly locked when the work platform is unbalanced to prevent the platform from shifting further and avoid the risk of imbalance and overturning from the source. Finally, the composite pin is fixed by multiple hexagonal nuts, labor-saving nuts and limit cotter pins to ensure the stability of the connection of each component and eliminate the safety hazards caused by loose connections during construction, providing a solid safety guarantee for the workers. (2) The lifting system uses a lifting motor and working steel wire rope to drive the work platform to move precisely in the vertical direction and directly reach the target work position. The walking trolley at the bottom of the supporting beam is equipped with a 360° rotating bearing and brake, which can realize flexible micro-adjustment of the platform in the horizontal direction. The construction position can be adjusted without overall disassembly, which completely avoids the tedious operation of frequently going up and down the platform and reduces the ineffective work time. In addition, the work platform adopts a foldable structure, which can be quickly unfolded and stored through foldable diagonal braces. With the Z-shaped storage handle, it is easy to transfer on the top of the beam, which greatly shortens the platform installation, disassembly and transportation cycle. (3) The design adopts lightweight and modular design. The supporting crossbeam is made of U-shaped square steel to balance structural strength and lightweight. The working platform is modularly assembled by combining steel pipes and pins. The overall weight is moderate, which makes it easy to transport and erect inside the bridge structure. No special suspension points or complex support structures are required. It can be directly and stably erected on the middle crossbeam body or adjacent reliable structures. The foldable diagonal brace design of the movable surface can ensure the stability of the platform structure when unfolded and reduce the space occupied when stored. It is suitable for middle crossbeam operation scenarios with different widths and heights. With the brake of the traveling trolley, the wheels can be locked after the platform is positioned to ensure the stability of the platform under different construction conditions. It effectively solves the problem that traditional equipment is difficult to construct in complex environments such as limited internal space and suspended working surface. Attached Figure Description

[0021] Figure 1 This is an elevation view of the overall structure of this utility model.

[0022] Figure 2 This is a detailed view of the composite pin structure of this utility model.

[0023] Figure 3 This is an elevation view of the walking trolley structure of this utility model.

[0024] Figure 4 This is a detailed structural diagram of the walking trolley brake of this utility model.

[0025] Figure 5 This is a detailed structural diagram of the safety device of this utility model.

[0026] Figure 6 This is a detailed drawing of the foldable diagonal brace structure of this utility model.

[0027] Figure 1 Components: 1. Support beam; 2. Lifting system; 3. Safety system; 4. Working platform; 5. Composite pin; 6. Rectangular square steel; 7. Z-shaped storage handle; 8. Traveling trolley; 9. U-shaped movable component; 10. Working wire rope; 11. Lock; 12. Lifting motor; 13. Safety wire rope; 14. Safety device body; 15. Safety device roller; 16. Safety counterweight; 17. Platform upright; 18. Fixed crossbar; 19. Movable crossbar; 20. Safety net; 21. Platform base plate; 22. Two-way composite pin; 23. Foldable diagonal brace; 24. Pin body; 25. Hexagonal nut; 26. Labor-saving nut; 27. Limiting cotter pin; 28. Trolley base; 29. ​​Rotary bearing; 30. Wheel base; 31. Wheel hub; 32. Tire; 33. Brake; 34. Folding rod; 35. Folding bearing; 36. Sliding fixing device. Detailed Implementation

[0028] like Figure 1 In the present invention, a foldable, mobile, lifting high-altitude construction platform for use in the crossbeam area of ​​a bridge includes a supporting crossbeam 1, a lifting system 2, a safety system 3, and a working platform 4. The support beam 1 is connected to the lifting system 2 and the work platform 4 respectively via composite pins 5. The safety system 3 and the work platform 4 are connected by a composite pin 5 and welding method.

[0029] In a preferred embodiment, the supporting beam 1 includes a U-shaped square steel 6, a Z-shaped storage handle 7, a walking trolley 8, and a U-shaped movable component 9; The zigzag storage handle 7 is fixedly connected to the U-shaped square steel 6 by screws; The traveling trolley 8 is fixed to the U-shaped square steel 6 by welding through the trolley base 28; The U-shaped movable component 9 is movably connected to the U-shaped square steel 6 via the composite pin 5.

[0030] In a preferred embodiment, the traveling trolley 8 includes a trolley base 28, a rotary bearing 29, a wheel base 30, a wheel hub 31, a tire 32, and a brake 33. The trolley base 28 is welded to the bottom of the U-shaped square steel 6; The rotary bearing 29 is fitted between the trolley base 28 and the wheel base 30. The rotary bearing 29 has steel balls inside to assist the trolley 8 in rotating in place. The wheel hub 31 is embedded inside the tire 32 and is mounted on the wheel base 30 via a bearing; The brake 33 is synchronously mounted on the wheel base 30 via bearings.

[0031] In a preferred embodiment, the lifting system 2 includes a working wire rope 10, a locking buckle 11, and a lifting motor 12; The working steel wire rope 10 is suspended on the composite pin 5, and its end is folded and fastened by the lock 11. The working wire rope 10 passes through the safety roller 15 and is connected to the lifting motor 12, which drives the lifting of the work platform 4.

[0032] In a preferred embodiment, the safety system 3 includes a safety wire rope 13, a safety device body 14, a safety device roller 15, and a safety counterweight 16. The safety wire rope 13 is suspended on the composite pin 5, and its end is folded and fastened by the lock 11 and connected to the lifting motor 12. The safety wire rope 13 is suspended at the tail by a safety weight 16 to keep the safety wire rope 13 taut.

[0033] In a preferred embodiment, the safety device body 14 is equipped with a safety device roller 15, which is composed of two types of pulleys assembled sequentially with nuts. The double-wheel structure enables the limiting and transmission functions of the working wire rope 10. The safety device body 14 has a narrow gap as a safety device trigger limit.

[0034] In a preferred embodiment, the work platform 4 includes a platform upright 17, a fixed crossbar 18, a movable crossbar 19, a safety net 20, a platform base plate 21, a two-way composite pin 22, and a foldable diagonal brace 23. The platform base plate 21 is connected to four platform uprights 17 via two bidirectional composite pins 22; Each movable surface of the work platform 4 is movably connected to the platform upright 17 via three movable crossbars 19 and composite pins 5, and the two lower parallel movable crossbars 19 of the movable surface are arranged opposite each other by foldable diagonal braces 23. Safety nets 20 are suspended around the bottom of the last layer of the work platform 4.

[0035] In a preferred embodiment, the foldable diagonal brace 23 includes a folding rod 34, a folding bearing 35, and a sliding fastener 36; The two folding rods 34 are connected by a folding bearing 35 to form the main body of the foldable diagonal brace 23; The folding rod 34 is equipped with a sliding fastener 36.

[0036] In a preferred embodiment, the composite pin 5 includes a pin body 24, a hexagonal nut 25, a force-saving nut 26, and a limiting cotter pin 27; After the pin body 24 is installed to the corresponding position, the hexagonal nut 25 and the force-saving nut 26 are screwed onto the pin body 24 in sequence. The limiting cotter pin 27 is installed in the reserved hole at the tail of the pin body 24.

[0037] The present invention discloses a foldable, movable, and lifting high-altitude construction platform for use in the crossbeam area of ​​a bridge. The construction operation process is as follows: (I) Platform Setup and Positioning 1. The workers select the upper support point corresponding to the working part of the crossbeam on the top of the bridge beam, and use the zigzag storage handle 7 to move the entire platform to the designated position and unfold the support crossbeam 1; 2. Push the platform to make slight adjustments in the horizontal direction to the precise working position via the traveling trolley 8, and then release the brakes 33 of the eight traveling trolleys in sequence to lock the wheels and prevent the platform from shifting. 3. Insert the self-made long rod into the working platform 4 and push the sliding fixing device 36 of the foldable diagonal brace 23 to the folding bearing 35. Fix it with a spring pin to ensure that the structure is stable after the movable surface is unfolded and there is no risk of folding.

[0038] (ii) Personnel entry and platform lifting 1. Workers should wear a five-point safety harness, attach the safety hook and buckle to the U-shaped storage handle 7, and enter the work platform 4 after confirming that the buckle is secure. Then, check the suspension of the safety net 20 again to ensure that it is completely closed. 2. Based on the construction clearance height, operate the lifting motor 12 to control the working wire rope 10 to extend and retract, driving the working platform 4 to move vertically until it accurately reaches the working position of the middle crossbeam or the middle cross diaphragm. Then, turn off the lifting motor 12 and lock it.

[0039] (III) Work Process and Safety Monitoring 1. During construction, workers perform tasks such as steel bar binding and formwork installation on the platform, utilizing the platform's stable operating space to ensure construction accuracy; 2. Arrange for a dedicated person to monitor the platform status on the beam top. If any abnormalities such as slight shaking of the platform occur, immediately adjust the platform position through the lifting motor (12) to ensure operational safety.

[0040] (iv) Platform collection and transfer 1. After the work is completed, operate the lifting motor 12 to drive the work platform 4 to rise to near the top of the beam, and the workers leave the platform and unfasten their safety belts; 2. Use the homemade long pole to pry open the sliding fastener 36 of the foldable diagonal brace 23, unlock the diagonal brace, and fold the work platform 4 together using the Z-shaped storage handle 7; 3. Close the brake 33 of the traveling trolley 8, push the platform to the next work point, repeat the above erection process, or move it to the designated location for storage.

Claims

1. A foldable, mobile, and lifting high-altitude construction platform for use in the crossbeam area of ​​a bridge, characterized in that: Comprises a support cross beam (1), a lifting system (2), a safety system (3) and a working platform (4); The support cross beam (1) and the lifting system (2), and the support cross beam (1) and the working platform (4) are respectively connected via composite pin shafts (5); The safety system (3) and the working platform (4) are connected by the composite pin shafts (5) in combination with welding.

2. The foldable, movable, and lifting high-altitude construction platform for use in the crossbeam area of ​​a bridge according to claim 1, characterized in that: The support cross beam (1) comprises a rectangular hollow square steel (6), a zigzag storage handle (7), a travelling trolley (8) and a U-shaped movable member (9); The zigzag storage handle (7) is fixedly connected to the rectangular hollow square steel (6) by screws; The travelling trolley (8) is welded and fixed to the rectangular hollow square steel (6) via a trolley base (28); The U-shaped movable member (9) is movably connected to the rectangular hollow square steel (6) via the composite pin shaft (5).

3. The foldable and movable lifting type construction platform applied to the cross beam area of a bridge according to claim 2, characterized in that: The travelling trolley (8) comprises a trolley base (28), a rotary bearing (29), a wheel base (30), a wheel hub (31), a tire (32) and a brake (33); The trolley base (28) is welded to the bottom of the rectangular hollow square steel (6); The rotary bearing (29) is clamped between the trolley base (28) and the wheel base (30), and steel balls are built in the rotary bearing (29) to assist the travelling trolley (8) to rotate in place; The wheel hub (31) is embedded inside the tire (32) and mounted on the wheel base (30) via a bearing; The brake (33) is synchronously mounted on the wheel base (30) via a bearing.

4. The foldable, movable, and lifting high-altitude construction platform for use in the crossbeam area of ​​a bridge according to claim 1, characterized in that: The lifting system (2) comprises a working steel wire rope (10), a lock catch (11) and a lifting motor (12); The working steel wire rope (10) is suspended on the composite pin shaft (5), and its end is fastened by the lock catch (11) after being folded; The working steel wire rope (10) passes through a safety device roller (15) and is connected to the lifting motor (12), and is driven by the lifting motor (12) to realize lifting of the working platform (4).

5. A foldable, movable, and lifting high-altitude construction platform for use in the crossbeam area of ​​a bridge, as described in claim 1, is characterized in that: The safety system (3) comprises a safety steel wire rope (13), a safety device body (14), a safety device roller (15) and a safety weight hammer (16); The safety steel wire rope (13) is suspended on the composite pin shaft (5), its end is fastened by the lock catch (11) after being folded, and is connected to the lifting motor (12); The safety weight hammer (16) is suspended at the tail of the safety steel wire rope (13) for keeping the safety steel wire rope (13) in a taut state.

6. A foldable, movable, and lifting high-altitude construction platform for use in the crossbeam area of ​​a bridge, as described in claim 5, is characterized in that: The safety device body (14) is equipped with the safety device roller (15), the safety device roller (15) is formed by sequentially assembling pulleys of two specifications through nuts, and the limiting and conducting effects on the working steel wire rope (10) are realized through the double-wheel structure; A narrow gap is provided on the safety device body (14) to serve as a trigger limit for the safety device.

7. A foldable movable lifting high-altitude construction platform applied to a crossbeam area of a bridge according to claim 1, characterized in that: The working platform (4) comprises platform vertical poles (17), fixed cross bars (18), movable cross bars (19), a safety anti-falling net (20), a platform bottom plate (21), bidirectional composite pin shafts (22) and foldable diagonal supporting rods (23); The platform bottom plate (21) is connected to four platform vertical poles (17) via two bidirectional composite pin shafts (22); Each movable surface of the work platform (4) is connected to the platform upright (17) by three movable crossbars (19) through a composite pin (5), and the two lower parallel movable crossbars (19) of the movable surface are arranged opposite each other by foldable diagonal bracing (23). The bottom of the work platform (4) is suspended by a safety net (20) around the last layer.

8. The foldable and movable lifting type construction platform for the cross beam area of a bridge according to claim 7, characterized in that: The foldable diagonal brace (23) includes a folding rod (34), a folding bearing (35), and a sliding fastener (36). The two folding rods (34) are connected by a folding bearing (35) to form the main body of the foldable diagonal brace (23); A sliding fastener (36) is mounted on the folding rod (34).

9. A foldable, mobile, and lifting high-altitude construction platform for use in the crossbeam area of ​​a bridge, as described in claim 1, is characterized in that: The composite pin (5) includes a pin body (24), a hexagonal nut (25), a force-saving nut (26), and a limiting cotter pin (27). After the pin body (24) is installed to the corresponding position, the hexagonal nut (25) and the force-saving nut (26) are screwed onto the pin body (24) in sequence; The limiting cotter pin (27) is installed in the reserved hole at the tail of the pin body (24).

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