Safety protection equipment for bridge demolition construction in road-crossing scene

Abstract

The invention relates to the technical field of road bridge construction, in particular to safety protection equipment for bridge demolition construction in a road-crossing scene, which comprises a balance weight part, the balance weight part is arranged on the bridge surface of a bridge main body, the balance weight part is perpendicular to the extension direction of the bridge main body, a suspension structure is arranged on the balance weight part, and the suspension structure is arranged on the bridge main body. The suspension structure can be fixed to the bridge body in an engaged mode and extend downwards obliquely towards the side face of the bridge body so that a stable bearing platform can be formed on the edge of the bridge body, and the suspension structure can force outside air to circulate and enter an operation area when a worker operates. According to the protective shed under the bridge, protection is provided for workers in the process of carrying out cutting and decomposing operation on the bridge from multiple aspects, the safety of the workers is powerfully guaranteed, and therefore the protective shed under the bridge is matched with an existing protective shed under the bridge, falling prevention and safety protection on the workers are achieved, and the safety of the workers is improved. And the construction risk in the demolition operation of the road-crossing bridge is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of road and bridge construction technology, and more specifically, to a safety protection device for bridge demolition construction in road crossing scenarios. Background Technology

[0002] Steel structure bridges have advantages such as high strength, light weight, ease of industrial manufacturing, and standardized construction. They are often used to cross highways, urban expressways, important intersections, important waterways, and general roads.

[0003] In municipal renovations, highway expansions, or upgrades of existing roads, as well as when some bridges are old and dilapidated or have reached the end of their service life, it is necessary to demolish old steel structure bridges that cross existing roads. This scenario has significant unique construction characteristics: traffic below needs to be kept open to the greatest extent possible, the work surface is located at a high altitude, and demolition operations (such as cutting and hoisting) are prone to generating falling objects, sparks, molten slag, etc., which pose a direct threat to vehicles, pedestrians, and road facilities below. Therefore, protective scaffolding is erected under the bridge during bridge demolition to effectively isolate the hazard source and ensure the safety of the area below the bridge. Bridge demolition also requires worker involvement. Workers need to perform cutting operations on the bridge deck, inside the box girder, flange plates, and bridge edges, or dismantle critical connections (such as high-strength bolt groups). These operations inevitably place workers at heights and near edges, requiring frequent movement. However, when performing these operations, especially cutting and dismantling at bridge edges, workers rely solely on safety ropes for protection. Under continuous, long-term work conditions, safety is extremely low, and the lack of stable support makes it difficult to apply force. This sometimes forces workers to take extremely risky actions. Operating in a confined posture or position further exacerbates the danger, making the protective effect of safety ropes even more inadequate. Therefore, existing protective technologies and equipment focus more on preventing falls from falling objects, sparks, molten slag, etc., generated during demolition operations, while relatively neglecting the safety protection of workers. In addition, the construction of protective sheds under bridges greatly compresses the space under the bridge, creating a relatively enclosed space between the protective sheds and the bridge. This greatly compresses the space and severely affects ventilation. If there is a lack of ventilation during cutting operations, the accumulation of harmful gases and fumes will be greatly amplified, thereby exacerbating the harm to the health of workers. Summary of the Invention

[0004] The purpose of this invention is to provide a safety protection device for bridge demolition construction in cross-road scenarios, so as to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides a safety protection device for bridge demolition construction in a cross-road scenario, including a counterweight. The counterweight is arranged on the bridge deck of the main body of the bridge and is perpendicular to the extension direction of the main body of the bridge. A suspension structure is provided on the counterweight. The suspension structure can be fixed to the main body of the bridge and extends obliquely downward to the side of the main body of the bridge to form a stable load-bearing platform at the edge of the main body of the bridge. When workers are working, the suspension structure can force outside air to circulate into the work area to control the degree of pollution in the work area and reduce the local temperature of the work area.

[0006] Furthermore, the suspension structure includes: Two end seats are respectively installed at both ends of the counterweight; Two tension arms are slidably connected to the two end seats respectively; Two protrusions are respectively installed on the top of the two tension arm rods; Two tensioners are respectively mounted on the two end seats and located directly behind the two tension arms; Two first steel cables, one end of each first steel cable is connected to two of the two tensioners, and the other end is connected to the top of the two protruding parts. Twisting the two tensioners can respectively wind up the two first steel cables to pull the two tension arms back along the two end seats. A cantilever arm, which is fixedly mounted on the counterweight and extends out of the bridge body; A connecting plate, the connecting plate being mounted on the end of the cantilever arm; A fence-type platform, the top of which is connected to the connecting base plate, and the fence-type platform is located diagonally below the side of the main body of the bridge; Two reinforcing forks are respectively installed on both sides of the connecting base plate and connected upward to the cantilever arm; A ladder, which is installed on the side of the fence-type platform and protrudes from the bridge deck of the main bridge body; Two claw plates are respectively installed at the ends of the two tension arms and extend vertically downward.

[0007] Furthermore, the connecting seat plate faces the side of the bridge body; A channel is provided through the middle of the connecting base plate, and a first fan is installed in the end of the channel. The first fan is located on the back of the connecting base plate.

[0008] Furthermore, a groove is provided on the front side of the connecting base plate, and a dividing plate is fitted into the groove. The dividing plate has a plurality of through holes arranged in an array. The channel passes through one end of the connecting base plate, inserts into the groove from the back, and is located behind the dividing plate. The diameter of the hole on the dividing plate is smaller than the diameter of the first fan and the channel.

[0009] Furthermore, a rectangular pipe is provided on the connecting base plate, a second fan is installed in one end of the rectangular pipe, the second fan is located on the back of the connecting base plate, the other end of the rectangular pipe is sealed, and two diverter connectors are connected to the sealed end, and the two diverter connectors are connected to an output pipe; The two output pipes extend toward the main body of the bridge and are respectively fixed to the two reinforcing forks, and the diameters of the ends of the two output pipes gradually increase. The two output pipes located in front of the two reinforcing forks are shaped flexible tubes.

[0010] Furthermore, two telescopic rods with locking function are symmetrically installed on the fence platform. The front ends of the two telescopic rods are connected to semi-enclosed abutments that can fit the worker's calves through universal joints. Both semi-enclosed abutments are equipped with buckle-type quick-release straps. The worker can brace his lower leg against the two semi-enclosed abutments and secure his lower leg to the two semi-enclosed abutments using two snap-on quick-release straps.

[0011] Furthermore, anchor piles are placed on the foundation next to the main body of the bridge, an electric winch is installed on the foundation, and a second steel cable is attached to the side of the counterweight. The second steel cable climbs around the anchor piles and connects to the electric winch.

[0012] Furthermore, the two end seats are respectively connected to the counterweight via rotating shafts; The two claw plates are rotatably connected to the two tension arms.

[0013] Furthermore, the counterweight has two separate fastening points on its side, and the second steel cable has two strands near the counterweight that are forked and fastened to the counterweight.

[0014] Furthermore, the counterweight has an electric corridor structure in the middle that extends along the main body of the bridge, and the suspension arm is located on the electric corridor structure. When the electric corridor structure is activated, it can drive the cantilever arm to move back and forth along the extension direction of the bridge body.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention relies on the existing bridge structure and obtains a firm fixing point by tightly interlocking with the bridge structure, thereby forming a stable and reliable load-bearing platform near the edge of the bridge for workers to stand on and carry out cutting and disassembly operations. It abandons the traditional method of using only safety ropes as protective equipment and completely eliminates the mode of workers working in a suspended state for a long time. It creates a stable support for workers during operation, effectively improves safety, and provides workers with sufficient support to apply force, effectively avoiding situations where workers need to adopt extremely unsafe postures or positions to operate. This invention, while relying on the existing bridge structure for fixation, also relies on the foundation around the bridge structure for reinforcement, thereby further ensuring a stable and safe working space for workers; This invention introduces a large-area and precise supply of external air, blowing it over a wide area and then onto the workers' breathing area in a smaller area. This effectively removes harmful gases and fumes generated during cutting operations, preventing their accumulation in the work area. The good ventilation also addresses the impact of the relatively enclosed space between the protective canopy under the bridge and the bridge itself on the rapid diffusion of harmful gases and fumes, protecting workers' health. Furthermore, the introduction of external air lowers the air temperature, allowing for airflow below room temperature to reach the work area. This is especially beneficial in hot weather, effectively controlling the temperature of the work area – a win-win situation. This invention provides workers with protection from multiple aspects when cutting and dismantling bridges, effectively ensuring worker safety. In conjunction with existing under-bridge protective sheds, it achieves fall prevention and worker safety protection, effectively avoiding construction risks in the demolition of cross-road bridges. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 A perspective view of the present invention is shown; Figure 2 A second perspective view of the present invention is shown; Figure 3 A third perspective view of the present invention is shown; Figure 4 A partial front view of the present invention is shown; Figure 5 A fourth perspective view of the present invention is shown; Figure 6 The present invention is shown. Figure 1 Enlarged view of point A; Figure 7 The present invention is shown. Figure 1 Enlarged view of point B; Figure 8 The present invention is shown. Figure 2 Enlarged view of point C; Figure 9 The present invention is shown. Figure 3 Enlarged view of point D; Figure 10 The present invention is shown. Figure 5 Enlarged view of point E.

[0018] In the figure, the same reference numerals represent the same structural element, wherein: 1. Counterweight; 2. Bridge main body; 3. Suspension structure; 31. End seat; 32. Tensioner arm; 33. Lifting member; 34. Rope tensioner; 35. First steel cable; 36. Suspension arm; 37. Connecting seat plate; 38. Fence-type platform; 39. Reinforced fork; 391. Ladder; 392. Claw plate; 393. Passageway; 394. First fan; 395. Trench; 396. Dividing plate; 397. Rectangular pipe; 398. Second fan; 399. Diverter joint; 3991. Output pipe; 4. Foundation; 5. Stakes; 6. Electric winch; 7. Second steel cable; 8. Rotating shaft; 9. Electric corridor structure. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0020] like Figure 1-10As shown, a safety protection device for bridge demolition construction in a cross-road scenario includes a counterweight 1, which is arranged on the bridge deck of the bridge body 2 and perpendicular to the extension direction of the bridge body 2. A suspension structure 3 is provided on the counterweight 1, which can be secured to the bridge body 2 and extends obliquely downwards to the side of the bridge body 2 to form a stable load-bearing platform at the edge of the bridge body 2. During worker operation, the suspension structure 3 forces outside air to circulate into the work area, controlling the pollution level and reducing the local temperature of the work area. This invention relies on the original bridge body 2, obtaining a firm fixing point by tightly engaging with the bridge body 2, thereby forming a stable and reliable load-bearing platform near the edge of the bridge body 2 for workers to stand on and perform cutting and dismantling operations. It abandons the traditional method of using only safety ropes as protective equipment, completely eliminating the mode of workers working in a suspended state for extended periods. It creates a stable support for workers during operation, effectively improving safety and providing sufficient support for workers to apply force, effectively avoiding situations where workers need to adopt extremely unsafe postures or positions for operation. This invention relies on... Based on the existing bridge main body 2 for fixation, the foundation 4 around the bridge main body 2 is further reinforced to ensure a stable and safe working space for workers. This invention continuously and precisely introduces external air over a large area, blowing it to the work area and then to the workers' breathing area in a smaller area, promptly blowing away harmful gases and fumes generated during cutting operations. This dual protection effectively prevents the accumulation of harmful gases and fumes in the work area. The good ventilation effect solves the problem of the relatively enclosed space between the protective shed under the bridge main body 2 and the bridge main body 2, which affects the rapid diffusion of harmful gases and fumes, protecting the health of workers. At the same time, it can reduce the air temperature during the introduction of external air, thus blowing the work area with airflow below room temperature. Especially in hot weather, it effectively controls the temperature of the work area, achieving two goals at once. This invention provides workers with protection from multiple aspects when cutting and dismantling the bridge main body 2, effectively ensuring worker safety. In conjunction with the existing protective shed under the bridge, it achieves fall prevention and worker safety protection, effectively avoiding construction risks in the demolition of cross-road bridges.

[0021] Optionally, the suspension structure 3 includes: Two end seats 31 are respectively installed at both ends of the counterweight 1; Two tension arms 32 are slidably connected to two end seats 31 respectively; Two protrusions 33 are respectively installed on the top of the two tension arm rods 32; Two rope tensioners 34 are respectively mounted on two end seats 31 and located directly behind the two tension arms 32. The rope tensioner 34 is an existing mechanical device, and various forms of rope tensioners 34 can be used. In this invention, a ratchet rope tensioner is specifically used. Two first steel cables 35, one end of each first steel cable 35 is connected to two rope tensioners 34, and the other end is connected to the top of two protrusions 33. Twisting the two rope tensioners 34 can rewind the two first steel cables 35 respectively, so as to pull the two tension arms 32 back along the two end seats 31. Suspension arm 36 is fixedly installed on counterweight 1 and extends out of bridge body 2; The connecting plate 37 is mounted on the end of the suspension arm 36; The top of the fence-type platform 38 is connected to the connecting seat plate 37, and the fence-type platform 38 is located diagonally below the side of the main body of the bridge 2. Two reinforcing forks 39 are respectively installed on both sides of the connecting base plate 37 and connected upward to the suspension arm 36; Ladder 391 is installed on the side of the fence platform 38 and protrudes from the bridge deck of the main bridge 2; Two claw plates 392 are respectively installed at the ends of two tension arms 32 and extend vertically downwards. During bridge demolition operations, the two tension arms 32 are first pulled out to their furthest point. The counterweights 1 are then placed on the bridge body 2 as required, at the location where the bridge body 2 will be cut and disassembled. At this point, the two claw plates 392 hang on both sides of the location on the bridge body 2 where the cutting and disassembly operations will take place. Then, using tools such as crowbars, the two rope tensioners 34 are rotated to tighten the two first steel cables 35. The two tension arms 32 are pulled back along the two end seats 31, causing the two claw plates 392 to gradually approach the bridge body 2 until they are completely pulled into close contact with the bridge body 2. At this point, the two rope tensioners 34 tighten the two first steel cables 35, and the two claw plates 392 clamp the bridge body 2 tightly. This integrates the counterweight 1, the two end seats 31, the two tension arms 32, and the two claw plates 392 with the bridge body 2, making them a single unit. The two claw plates 392 directly and firmly engage with the bridge body 2. On the main body 2, the counterweight 1, two end seats 31, two tension arms 32, and two claw plates 392 are firmly fixed to the bridge main body 2 as a whole. Then, the suspension arm 36 is installed on the counterweight 1. At this time, the fence platform 38 is located diagonally below the side of the bridge main body 2, that is, near the part of the bridge main body 2 to be cut and disassembled. It relies on the original bridge main body 2 to obtain a firm fixing point to ensure the stability and reliability of the fence platform 38. Then, the worker can go down into the fence platform 38 through the ladder 391 to carry out the work. The fence platform 38 can provide workers with a safe standing position to carry out cutting and disassembly operations. It abandons the traditional method of using only safety ropes as protective equipment and completely eliminates the mode of workers working in a suspended state for a long time. It creates a stable support for workers during operation, effectively improves safety, and provides workers with sufficient support to apply force. It avoids situations where workers need to adopt extremely unsafe postures or positions to operate, realizes worker safety protection, and effectively avoids construction risks in the demolition of cross-road bridges.

[0022] Optionally, the connecting seat plate 37 faces the side of the bridge body 2; A channel 393 is provided through the middle of the connecting base plate 37. A first fan 394 is installed at the end of the channel 393. The first fan 394 is located on the back of the connecting base plate 37. The first fan 394 and other electrical equipment are connected to an external fixed power supply or portable power supply to ensure normal use. After the cantilever arm 36 is installed, the first fan 394 and the channel 393 are also facing the work area. When the worker enters the fence platform 38 to work, the first fan 394 is activated. The first fan 394 starts blowing air, blowing the air outside the work area into the work area in the form of airflow through the channel 393. This effectively blows away the harmful gases and fumes generated during the cutting operation, preventing the accumulation of harmful gases and fumes in the work area. The good ventilation effect solves the problem of the relatively closed space formed between the protective canopy under the bridge body 2 and the bridge body 2, which affects the rapid diffusion of harmful gases and fumes. This provides soft safety protection for the workers and protects their health.

[0023] Optionally, a groove 395 is provided on the front side of the connecting base plate 37, and a dividing plate 396 is fitted inside the groove 395. Several through holes are arrayed on the dividing plate 396. Channel 393 passes through one end of connecting base plate 37 and is inserted into slot 395 from the back, located behind partition plate 396. The diameter of the hole on partition plate 396 is smaller than the diameter of the first fan 394 and channel 393. The area of ​​slot 395 and partition plate 396 is much larger than the cross-sectional area of ​​channel 393, while the diameter of the hole on partition plate 396 is much smaller than the diameter of the first fan 394 and channel 393. Therefore, when the air blown by the first fan 394 continuously enters slot 395 through channel 393, due to the obstruction of partition plate 396, the air can only escape through the hole on partition plate 396. However, the hole is very small, so the air blown by the first fan 394 cannot be directly blown out from one or a few holes, but diffuses over a large area within slot 395. Finally, air blows outward from all the holes on partition plate 396, thus greatly expanding the area of ​​the generated airflow. The system ensures that the wind continuously blows over a large area of ​​the work area, covering it as much as possible. This ensures that harmful gases and fumes generated during cutting are blown away in a timely manner, guaranteeing their rapid dissipation. The air blown by the first fan 394, exiting through the holes in the dividing plate 396, accelerates due to the small size of the holes, increasing airflow speed and lowering temperature. This enhances wind power, further ensuring the timely and rapid dispersal of harmful gases and fumes. Furthermore, the use of air cooler than room temperature to the work area and workers helps to cool them down, especially in hot weather when cutting is being performed. This dual benefit provides workers with comprehensive safety protection, ensuring safe construction and effectively mitigating construction risks during the demolition of road bridges.

[0024] Optionally, a rectangular pipe 397 is provided on the connecting base plate 37. A second fan 398 is installed in one end of the rectangular pipe 397. The second fan 398 is located on the back of the connecting base plate 37. The other end of the rectangular pipe 397 is sealed, and two diverter connectors 399 are connected to the sealed end. The two diverter connectors 399 are connected to an output pipe 3991. Two output pipes 3991 extend toward the main body of the bridge 2 and are fixed to two reinforcing forks 39 respectively, and the diameter of the ends of the two output pipes 3991 gradually increases; The two output pipes 3991 located in front of the two reinforcing forks 39 are shaped flexible tubes, such as gooseneck tubes, allowing them to be twisted and shaped freely. During cutting operations, the two output pipes 3991 are twisted and shaped so that they face the worker's mouth and nose area. The second fan 398 is activated during operation, blowing air directly towards the area around the worker's mouth and nose through the two splitter joints 399 and the two output pipes 3991. Because the worker faces the main bridge 2 and has their back to the trough 395 during operation, their back blocks the wind, thus the area in front of the worker is not exposed to the wind. The output pipe 3991 blows air directly towards the area around the worker's mouth and nose, quickly and promptly dispersing and removing harmful gases and fumes, avoiding blind spots, and further ensuring that harmful gases and fumes do not accumulate around the worker's mouth and nose area. With dual protection of coverage and precise small-area coverage, it effectively prevents harmful gases and fumes from accumulating in areas that workers can inhale, ensuring the protective effect. The two output pipes 3991 can be freely twisted to keep them in an unobstructed state, so as not to hinder the worker's work. The ends of the two output pipes 3991 are flared outwards in a trumpet shape, and when the air passes by, it can be blown out along the trumpet-shaped ends to ensure that it is accurately blown around the worker's mouth and nose area.

[0025] Optionally, two telescopic rods with locking functions are symmetrically installed on the fence-type platform 38. The front ends of the two telescopic rods are connected to semi-enclosed stop components that fit the worker's calves via universal joints. Both semi-enclosed stop components are equipped with snap-on quick-release straps, ensuring that the two semi-enclosed stop components can move flexibly without dead angles with the support of the universal joints, thus providing freedom of movement for the user. Workers can brace their lower legs against the two semi-enclosed abutments and secure them with two quick-release buckle straps. When workers are cutting, especially disassembling and dismantling key connection parts of the bridge main body 2, and need to apply force, they can adjust the length of the two telescopic rods to a suitable position so that the two semi-enclosed abutments are positioned where the workers' lower legs are ideally placed for applying force. Then, workers can brace their lower legs against the two semi-enclosed abutments and tighten the two quick-release buckle straps, thus integrating their lower legs with the fence-type platform 38. This automatically provides stable support when workers apply force, giving them sufficient support to exert force, while also providing active protection and further improving safety.

[0026] Optionally, anchor piles 5 are placed on the foundation 4 next to the main bridge body 2. An electric winch 6 is installed on the foundation 4. A second steel cable 7 is attached to the side of the counterweight 1. The second steel cable 7 is wound around the anchor pile 5 and connected to the electric winch 6. After the two claw plates 392 are engaged with the main bridge body 2, the anchor pile 5 is nailed at a suitable position on the adjacent foundation 4. The second steel cable 7 is pulled out from the electric winch 6, wound around the anchor pile 5, and attached to the counterweight 1. The electric winch 6 is then activated to tighten the second steel cable 7, thereby relying on the foundation 4 to tighten the counterweight 1, the two end seats 31, and the two tension arms. The counterweight 1, the two end seats 31, the two tension arms 32, and the two claw plates 392 are pulled and fixed together to achieve reinforcement, so as to prevent the counterweight 1, the two end seats 31, the two tension arms 32, and the two claw plates 392 from shifting due to vibration or other external influences, which would cause instability of the fence platform 38, and further ensure that a stable and safe working space is built for the workers; when the counterweight 1, the two end seats 31, the two tension arms 32, the two claw plates 392, and the fence platform 38 need to be moved for the next operation, the second steel cable 7 is first untied, and then tied back on after being re-fixed.

[0027] Optionally, the two end seats 31 are connected to the counterweight 1 via the rotating shaft 8, so that the two end seats 31 can rotate freely instead of only being able to remain straight, ensuring that suitable fixing points can be actively found according to the specific conditions on both sides of the bridge body 2. Two claw plates 392 are rotatably connected to two tension arms 32. When the two end seats 31 rotate, the posture of the two claw plates 392 can also be adjusted to ensure that they can fully contact the bridge body 2 for engagement and fixation, so as to ensure that the bridge body 2 is firmly engaged.

[0028] Optionally, the counterweight 1 has two separate fastening points on its side. The second steel cable 7 has two strands near the counterweight 1 and is forked and fastened to the counterweight 1, increasing the number of fastening points of the second steel cable 7 on the counterweight 1, so that the tensile force on the counterweight 1 is uniform and the reinforcement effect is improved.

[0029] Optionally, the counterweight 1 has an electric corridor structure 9 located in the middle along the extension direction of the main bridge body 2, and the suspension arm 36 is located on the electric corridor structure 9. When the electric corridor structure 9 is activated, it can drive the suspended arm 36 to move back and forth along the extension direction of the bridge body 2. The electric corridor structure 9 is a linear movement mechanism driven by hydraulic cylinders, etc. It can move the suspended arm 36 back and forth along the extension direction of the bridge body 2, so that the fence platform 38 can also move along with it. After one fixation, it can allow workers to work in a larger area, ensuring that multiple areas on the bridge body 2 that need to be cut and disassembled can be worked on with one fixation, avoiding the need to frequently move and disassemble the protective equipment, and reducing the burden of the entire demolition construction as much as possible.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A safety protection device for bridge demolition construction in a cross-road scenario, comprising a counterweight (1), wherein the counterweight (1) is arranged on the bridge deck of the bridge body (2), and the counterweight (1) is perpendicular to the extension direction of the bridge body (2), characterized in that: The counterweight (1) is provided with a suspension structure (3), which can be fastened to the bridge body (2) and extend obliquely downward to the side of the bridge body (2) to form a stable load-bearing platform at the edge of the bridge body (2). When workers are working, the suspension structure (3) can force outside air to circulate into the work area to control the pollution level of the work area and reduce the local temperature of the work area.

2. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 1, characterized in that, The suspension structure (3) includes: Two end seats (31) are respectively installed at both ends of the counterweight (1); Two tension arms (32) are slidably connected to two end seats (31); Two protrusions (33) are respectively installed on the top of the two tension arm rods (32); Two rope tensioners (34) are respectively mounted on the two end seats (31) and located directly behind the two tension arms (32); Two first steel cables (35), one end of each first steel cable (35) is connected to two rope tensioners (34), and the other end is connected to the top of two protrusions (33). Twisting the two rope tensioners (34) can respectively wind up the two first steel cables (35) to pull back the two tension arms (32) along the two end seats (31); Suspension arm (36), which is fixedly installed on the counterweight (1) and extends out of the bridge body (2); A connecting plate (37) is mounted on the end of the cantilever arm (36); A fence-type platform (38) is connected at the top to the connecting seat plate (37), and the fence-type platform (38) is located diagonally below the side of the bridge body (2); Two reinforcing forks (39) are respectively installed on both sides of the connecting base plate (37) and connected upward to the suspension arm (36). A ladder (391) is installed on the side of the fence platform (38) and protrudes from the bridge deck of the bridge body (2); Two claw plates (392) are respectively installed at the ends of the two tension arms (32) and extend vertically downward.

3. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 2, characterized in that: The connecting seat plate (37) faces the side of the bridge body (2); A channel (393) is provided through the middle of the connecting base plate (37), and a first fan (394) is installed in the end of the channel (393). The first fan (394) is located on the back of the connecting base plate (37).

4. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 3, characterized in that: The connecting base plate (37) has a groove (395) on its front side, and a dividing plate (396) is fitted inside the groove (395). The dividing plate (396) has a plurality of through holes arranged in an array. The channel (393) passes through one end of the connecting base plate (37), inserts into the groove (395) from the back, and is located behind the dividing plate (396). The diameter of the hole on the dividing plate (396) is smaller than the diameter of the first fan (394) and the channel (393).

5. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 4, characterized in that: A rectangular pipe (397) is provided on the connecting base plate (37). A second fan (398) is installed in one end of the rectangular pipe (397). The second fan (398) is located on the back of the connecting base plate (37). The other end of the rectangular pipe (397) is sealed, and two diverter connectors (399) are connected to the sealed end. The two diverter connectors (399) are connected to an output pipe (3991). The two output pipes (3991) extend toward the bridge body (2) and are respectively fixed on the two reinforcing forks (39), and the diameter of the ends of the two output pipes (3991) gradually increases; The two output pipes (3991) located in front of the two reinforcing forks (39) are shaped hoses.

6. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 5, characterized in that: Two telescopic rods with locking function are symmetrically installed on the fence platform (38). The front ends of the two telescopic rods are connected to a semi-enclosed stop that can fit the worker's calves through a universal joint. Both semi-enclosed stopes are equipped with buckle-type quick-release straps. The worker can brace his lower leg against the two semi-enclosed abutments and secure his lower leg to the two semi-enclosed abutments using two snap-on quick-release straps.

7. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 6, characterized in that: Anchored piles (5) are placed on the foundation (4) next to the main body (2) of the bridge. An electric winch (6) is installed on the foundation (4). A second steel cable (7) is attached to the side of the counterweight (1). The second steel cable (7) climbs over the piles (5) and is connected to the electric winch (6).

8. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 7, characterized in that: The two end seats (31) are respectively connected to the counterweight (1) via a rotating shaft (8); The two claw plates (392) are rotatably connected to the two tension arms (32).

9. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 8, characterized in that: The counterweight (1) has two separate fastening points on its side. The second steel cable (7) has two strands near the counterweight (1) and is forked and fastened to the counterweight (1).

10. The safety protection equipment for bridge demolition construction in a cross-road scenario as described in claim 9, characterized in that: The counterweight (1) has an electric corridor structure (9) in the middle part, which is arranged along the extension direction of the main body of the bridge (2), and the suspension arm (36) is located on the electric corridor structure (9). When the electric corridor structure (9) is activated, it can drive the cantilever arm (36) to move back and forth along the extension direction of the bridge body (2).

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