A hoisting device and hoisting method for bridge guardrail installation

Abstract

The present application relates to the technical field of hoisting device, and specifically discloses a hoisting device and hoisting method for bridge guardrail installation, which comprises a bridge body, a plurality of first bolts vertically arranged on the upper side edge of the bridge body, a plurality of second bolts horizontally arranged on the side edge of the bridge body, a vehicle body arranged on the side of the bridge body close to the first bolts, a supporting assembly arranged above the vehicle body, a plurality of guardrails arranged on the supporting assembly, a grabbing device for grabbing the guardrails, and a driving device for driving the grabbing device to move; the guardrail comprises a connecting plate in a 7-shaped structure, a fence arranged on one side of the connecting plate in an inclined manner, a connecting hole opened on the upper end surface of the connecting plate, and a connecting plate in an N-shaped structure vertically arranged on the lower end of the connecting plate; and a pair of connecting rods for connecting the fence and the connecting plate. The hoisting device and hoisting method for bridge guardrail installation can efficiently hoist and install the bridge guardrail.

Description

Technical Field

[0001] This invention relates to the technical field of hoisting devices, and more specifically, to a hoisting device and hoisting method for installing bridge railings. Background Technology

[0002] To meet the basic requirements of road safety protection, fencing facilities are usually required to be installed on both sides of the road, especially on special road sections such as bridges, where the installation of protective fences is a core requirement to ensure traffic safety. Conventional bridge fences are mostly vertically fixed and installed at the edges of both sides of the bridge. Their core function is to prevent pedestrians from accidentally climbing over or various objects from falling from both sides of the bridge through physical barriers, thereby avoiding potential safety risks to the roads, rivers, or other areas below. They are a fundamental guarantee in the bridge safety protection system.

[0003] However, in certain special scenarios, the protective capabilities of conventional vertical fences are insufficient to meet higher safety requirements. For example, in extremely high cross-sea bridges, viaducts in deep mountain canyons, or situations where the bridge is situated above densely populated pedestrian areas, commercial districts, or school zones, a person climbing over the fence or a heavy object falling could cause a serious accident. Therefore, in addition to installing conventional vertical fences, extra protective facilities, such as fall arrest nets, need to be added to the sides of the bridge. These fall arrest nets typically employ an inclined design, forming an angle with the vertical fence and extending outwards. Compared to traditional vertical fences, they offer a wider protective range and better cushioning. Even if a pedestrian accidentally climbs over the fence or an object falls accidentally, the fall arrest net can quickly catch them, effectively reducing the fall speed and minimizing personal injury and property damage, further enhancing the safety level of the bridge.

[0004] However, the installation of such inclined fall arrestors presents numerous practical challenges. Because the fall arrestors need to be installed on the side of the bridge and extend outwards, the installation location is unique and the working space is limited. This places extremely high demands on the precision and load-bearing capacity of the hoisting equipment, and also requires construction personnel to possess extensive experience in high-altitude operations and specialized operating skills. During construction, personnel must work at heights along the bridge edge, resulting in high labor intensity and safety risks. Furthermore, the complex installation process extends the construction period and significantly increases related costs such as equipment rental and labor, placing considerable pressure on the project. Therefore, a hoisting device that can more efficiently install this type of guardrail could be designed. Summary of the Invention

[0005] The purpose of this invention is to provide a hoisting device and hoisting method for installing bridge railings, which can efficiently hoist and install bridge railings.

[0006] This invention is achieved through the following technical solution: The hoisting device for installing bridge railings includes a bridge body, a plurality of first bolts vertically disposed on the upper edge of the bridge body, a plurality of second bolts horizontally disposed on the side of the bridge body, a vehicle body disposed on the side of the bridge body near the first bolts, a support assembly disposed above the vehicle body, a plurality of railings erected on the support assembly, a gripping device for gripping the railings, and a driving device for moving the gripping device; the railings include a connecting plate with a 7-shaped structure, a fence inclinedly disposed on one side of the connecting plate, a connecting hole opened on the upper surface of the connecting plate, an N-shaped connecting piece vertically disposed at the lower end of the connecting plate; and a pair of connecting rods for connecting the fence and the connecting plate; the gripping device is used to grip the connecting rods, the first bolts correspond to the connecting holes, and the second bolts correspond to the connecting pieces.

[0007] Furthermore, the length direction of the vehicle body is parallel to the length direction of the bridge body; the driving device includes a guide rail horizontally mounted on the vehicle body, a slider slidably mounted on the guide rail, a moving mechanism for driving the slider to move along the guide rail, a first motor fixedly mounted in the slider, a first screw mounted on the output shaft of the first motor, a sleeve threadedly connected to the first screw, and a driving rod fixedly connected to the side wall of the sleeve; the length direction of the guide rail is perpendicular to the length direction of the vehicle body, the first screw is vertically mounted, the sleeve is mounted above the slider, and the gripping device is fixedly mounted at the end of the driving rod away from the sleeve.

[0008] Furthermore, a vertically arranged limiting rod is fixedly provided on the slider, a limiting block is slidably provided on the outer wall of the limiting rod, and a top plate is fixedly provided at the upper end of the limiting rod; the limiting block is fixedly connected to the side wall of the sleeve, and the first screw is rotatably connected to the top plate.

[0009] Furthermore, the pair of connecting rods are horizontally arranged and parallel to each other; the gripping device includes a pull rod connected to the drive rod and horizontally arranged, and a pair of clamping assemblies respectively disposed at both ends of the pull rod; one clamping assembly is used to clamp one of the connecting rods.

[0010] Furthermore, the clamping assembly includes a through hole at the end of the pull rod, a clamping plate slidably disposed in the through hole, and an electric push rod fixedly disposed on the pull rod; the length direction of the pull rod is perpendicular to the length direction of the connecting rod, the clamping plate is a horizontally disposed U-shaped structure, the open end of the clamping plate is disposed facing the end of the pull rod, the length direction of the electric push rod is parallel to the length direction of the pull rod, and the movable end of the electric push rod is fixedly connected to the clamping plate.

[0011] Furthermore, the support assembly includes an elongated support block fixedly mounted on the vehicle body, and a baffle disposed on one side of the support block; the length direction of the baffle is parallel to the length direction of the support block, and the length direction of the support block is parallel to the length direction of the vehicle body; a gap is provided between the baffle and the support block, and the connecting piece is slidably disposed in the gap between the baffle and the support block; the upper surface of the support block is an inclined surface, and when the fence is placed on the upper surface of the support block, the connecting rod is in a horizontal state.

[0012] Furthermore, the support assembly also includes a pushing assembly for pushing the guardrail to move along the length direction of the support block; the pushing assembly includes a push block, a sliding groove formed on the lower side of the push block, a second screw threadedly connected to the push block, a pair of support seats respectively disposed at both ends of the second screw, and a second motor connected to the second screw; a portion of the push block is disposed between the baffle and the support block, the baffle is slidably disposed in the sliding groove, the support seats are fixedly connected to the vehicle body, and the support seats are rotatably connected to the second screw.

[0013] Furthermore, the vehicle body is provided with a first photoelectric sensor and a second photoelectric sensor; the first photoelectric sensor is vertically upwardly disposed at one end of the support block near the drive device, and the first photoelectric sensor is disposed towards the connection hole; the second photoelectric sensor is horizontally disposed on the side wall of the vehicle body near the first bolt, and the second photoelectric sensor is disposed towards the first bolt.

[0014] Furthermore, it also includes a suspended platform assembly detachably connected to the vehicle body; the suspended platform assembly includes a suspended platform body, a load-bearing rod connected to the suspended platform body, a load-bearing plate fixedly connected to the load-bearing rod, a mounting hole opened on the load-bearing plate, and a connecting column fixedly installed on the vehicle body; the suspended platform body is located below the side of the bridge body, and the connecting column is detachably inserted into the mounting hole; a horizontally arranged operating plate is fixedly installed on the side wall of the vehicle body near the first bolt, the side wall of the operating plate is provided with a surrounding plate, and the operating plate has an operating hole; the operating hole is located directly above the first bolt.

[0015] The present invention also provides a lifting method based on the above-mentioned lifting device for bridge railing installation, comprising the following operation steps;

[0016] (1) Place the guardrail on the support block on the vehicle body at the end away from the drive device, so that the fence is placed on the support block and the connecting piece is inserted between the baffle and the support block;

[0017] (2) The push assembly is used to push the guardrail toward one end of the drive device, wherein the second motor drives the second screw to rotate, so that the push block moves along the second screw and the push block pushes the guardrail to move. When the first photoelectric sensor detects that the connection hole is directly above it, the second motor stops rotating and rotates in the opposite direction so that the push block returns to the previous position.

[0018] (3) The vehicle body moves along the bridge body. When the second photoelectric sensor is blocked by the second bolt, the vehicle body stops moving.

[0019] (4) The grabbing device grabs a guardrail on the support block and moves it to the edge of the bridge body under the action of the drive device. Then the guardrail is lowered. At this time, the first bolt is inserted into the connecting hole and the second bolt is inserted into the connecting piece. The worker in the suspended basket body screws the nut into the second bolt and the worker on the operating plate screws the nut into the first bolt.

[0020] (5) Repeat steps (1)-(4).

[0021] The technical solution of this invention has at least the following advantages and beneficial effects: The hoisting device and method for installing bridge railings of this invention allow workers or a crane to transfer the railing to a support assembly on a vehicle (the specific size and weight depend on the railing). Then, a gripping device grips the railing from the support assembly, and a drive device moves the gripping device and railing to the side of the bridge body, allowing the first bolt to be inserted into the connecting hole and the second bolt into the connecting piece. Finally, nuts are screwed onto the first and second bolts. This not only enables efficient railing installation but also reduces manual labor throughout the process, making it easier for workers. It also enables efficient installation of large-sized and heavy railings. Furthermore, the railing is simultaneously connected to the upper surface and sides of the bridge body, resulting in a more stable installation and easier disassembly and maintenance later. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a hoisting device for installing bridge railings provided in an embodiment of the present invention;

[0023] Figure 2 A two-view structural schematic diagram of the hoisting device for installing bridge railings provided in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the vehicle body and guardrail provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the vehicle body from one perspective, provided in an embodiment of the present invention.

[0026] Figure 5 A two-view structural schematic diagram of the vehicle body provided in an embodiment of the present invention;

[0027] Figure 6 This is a structural schematic diagram of a guardrail provided in an embodiment of the present invention;

[0028] Figure 7 This is a two-view structural schematic diagram of the guardrail provided in an embodiment of the present invention;

[0029] Figure 8 This is a structural schematic diagram of the suspended platform assembly provided in an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the gripping device provided in an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the unfolded structure of the gripping device provided in an embodiment of the present invention;

[0032] Figure 11 for Figure 2 Enlarged view of part A in the middle.

[0033] Icons: 11-Bridge body, 12-First bolt, 13-Second bolt, 20-Vehicle body, 21-First photoelectric sensor, 22-Second photoelectric sensor, 23-Suspended platform assembly, 231-Suspended platform body, 232-Bearing rod, 233-Bearing plate, 234-Mounting hole, 235-Connecting column, 24-Operating panel, 25-Operating hole, 30-Support assembly, 31-Support block, 32-Baffle, 33-Push assembly, 331-Push block, 332-Second screw, 3 33-Support base, 334-Second motor, 40-Guardrail, 41-Connecting plate, 42-Fence, 43-Connecting hole, 44-Connecting piece, 45-Connecting rod, 50-Gripping device, 51-Pull rod, 52-Clamping assembly, 521-Through hole, 522-Clamping plate, 523-Electric push rod, 60-Drive device, 61-Guide rail, 62-Slider, 63-First screw, 64-Sleeve, 65-Drive rod, 66-Limiting rod, 67-Limiting block, 68-Top plate. Detailed Implementation

[0034] Example 1

[0035] The following description, in conjunction with specific embodiments, further illustrates the point, as shown in the appendix. Figure 1 - Appendix Figure 11As shown, the hoisting device for installing bridge railings 40 in this embodiment includes a bridge body 11, a plurality of first bolts 12 vertically disposed on the upper edge of the bridge body 11, a plurality of second bolts 13 horizontally disposed on the side of the bridge body 11, a vehicle body 20 disposed on the side of the bridge body 11 near the first bolts 12, a support assembly 30 disposed above the vehicle body 20, a plurality of railings 40 erected on the support assembly 30, a gripping device 50 for gripping the railings 40, and a device for driving the gripping device 50 to move. The drive device 60; the guardrail 40 includes a connecting plate 41 with a 7-shaped structure, a fence 42 inclined on one side of the connecting plate 41, a connecting hole 43 opened on the upper end face of the connecting plate 41, and an N-shaped connecting piece 44 vertically arranged at the lower end of the connecting plate 41; and a pair of connecting rods 45 for connecting the fence 42 and the connecting plate 41; the gripping device 50 is used to grip the connecting rods 45, the first bolt 12 corresponds to the connecting hole 43, and the second bolt 13 corresponds to the connecting piece 44. Specifically, during use, workers or a crane can transfer the guardrail 40 to the support assembly 30 on the vehicle body 20 (depending on the size and weight of the guardrail 40). Then, the gripping device 50 grips the guardrail 40 on the support assembly 30, and the drive device 60 drives the gripping device 50 and the guardrail 40 to move to the side of the bridge body 11, so that the first bolt 12 is inserted into the connecting hole 43, the second bolt 13 is inserted into the connecting piece 44, and the nut is screwed into the first bolt 12 and the second bolt 13. This not only allows for efficient installation of the guardrail 40, but also reduces the amount of manual labor involved, making it easier for workers to operate. It also enables efficient installation of large-sized and heavy guardrails 40. Furthermore, the guardrail 40 is connected to both the upper surface and the side of the bridge body 11, making the installation of the guardrail 40 more stable and facilitating subsequent disassembly and maintenance.

[0036] In this embodiment, the length direction of the vehicle body 20 is parallel to the length direction of the bridge body 11. The driving device 60 includes a guide rail 61 horizontally mounted on the vehicle body 20, a slider 62 slidably mounted on the guide rail 61, a moving mechanism for driving the slider 62 to move along the guide rail 61, a first motor fixedly mounted in the slider 62, a first screw 63 mounted on the output shaft of the first motor, a sleeve 64 threadedly connected to the first screw 63, and a driving rod 65 fixedly connected to the side wall of the sleeve 64. The length direction of the guide rail 61 is perpendicular to the length direction of the vehicle body 20, the first screw 63 is vertically mounted, the sleeve 64 is located above the slider 62, and the gripping device 50 is fixedly mounted at the end of the driving rod 65 away from the sleeve 64. Specifically, the moving structure can drive the slider 62 to reciprocate on the guide rail 61, wherein the moving mechanism can be driven by a linear motor, a ball screw, or a traction rope. The motor in the slider 62 drives the first screw 63 to rotate, thereby causing the sleeve 64 to move axially on the first screw 63. Therefore, when it is necessary to grab and move the guardrail 40, the slider 62 first moves the grabbing device 50 to directly above the guardrail 40. Then, the first screw 63 rotates, causing the sleeve 64 to drive the drive rod 65 and the grabbing device 50 to descend. After the grabbing device 50 grabs the guardrail 40, the sleeve 64 and the drive rod 65 drive the grabbing device 50 and the guardrail 40 to rise. The slider 62 moves the whole structure to the side edge of the bridge body 11, so that the connecting hole 43 is exactly above the first bolt 12. Then, the sleeve 64 and the drive rod 65 drive the grabbing device 50 and the guardrail 40 to descend, so that the first bolt 12 is inserted into the connecting hole 43 and the second bolt 13 is inserted into the connecting piece 44. The worker can then screw the nut into the first bolt 12 and the second bolt 13. Then the gripping device 50 releases the guardrail 40, and the driving device 60 drives the gripping device 50 back to its previous position.

[0037] In this embodiment, a vertically positioned limiting rod 66 is fixedly mounted on the slider 62, a limiting block 67 is slidably mounted on the outer wall of the limiting rod 66, and a top plate 68 is fixedly mounted on the upper end of the limiting rod 66. The limiting block 67 is fixedly connected to the side wall of the sleeve 64, and the first screw 63 is rotatably connected to the top plate 68. Specifically, the limiting rod 66, the limiting block 67, and the top plate 68 ensure that the sleeve 64 will only move axially and will not rotate. It should be noted that the driving method of the first motor and the first screw 63 can also be replaced by a hydraulic cylinder, a lifting rope, or other driving methods.

[0038] In this embodiment, the pair of connecting rods 45 are horizontally arranged and parallel to each other; the gripping device 50 includes a pull rod 51 connected to the drive rod 65 and horizontally arranged, and a pair of clamping assemblies 52 respectively disposed at both ends of the pull rod 51; one clamping assembly 52 is used to clamp one connecting rod 45. The clamping assembly 52 includes a through hole 521 opened at the end of the pull rod 51, a clamping plate 522 slidably disposed in the through hole 521, and an electric push rod 523 fixedly disposed on the pull rod 51; the length direction of the pull rod 51 is perpendicular to the length direction of the connecting rod 45, the clamping plate 522 is a horizontally arranged U-shaped structure, the open end of the clamping plate 522 is disposed facing the end of the pull rod 51, the length direction of the electric push rod 523 is parallel to the length direction of the pull rod 51, and the movable end of the electric push rod 523 is fixedly connected to the clamping plate 522. Specifically, when it is necessary to grip the guardrail 40, the drive device 60 drives the pull rod 51 to descend to the middle of a pair of connecting rods 45. Then, the electric push rods 523 at both ends of the connecting rods 45 simultaneously push out the clamping plate 522, so that the clamping plate 522 is clamped on the connecting rods 45. This enables the temporary clamping operation of the guardrail 40. Then, the drive device 60 can be used to drive the gripping device 50 and the guardrail 40 to move.

[0039] The support assembly 30 in this embodiment includes a long strip-shaped support block 31 fixedly mounted on the vehicle body 20, and a baffle 32 disposed on one side of the support block 31. The length direction of the baffle 32 is parallel to the length direction of the support block 31, and the length direction of the support block 31 is parallel to the length direction of the vehicle body 20. A gap is provided between the baffle 32 and the support block 31, and a connecting piece 44 is slidably disposed in the gap between the baffle 32 and the support block 31. The upper surface of the support block 31 is an inclined surface, and when the guardrail 42 is placed on the upper surface of the support block 31, the connecting rod 45 is in a horizontal state. Specifically, multiple guardrails 40 can be placed on the support block 31 at one time, thus providing more operational space and a higher fault tolerance rate. Furthermore, the inclined support block 31 ensures that the connecting rod 45 is in a horizontal state, making it easier for the gripping device 50 to grip it. The baffle 32 is set to hold the connecting piece 44, which can better position the guardrail 40.

[0040] The support assembly 30 in this embodiment also includes a pushing assembly 33 for pushing the guardrail 40 to move along the length of the support block 31. The pushing assembly 33 includes a push block 331, a groove formed on the lower side of the push block 331, a second screw 332 threadedly connected to the push block 331, a pair of support seats 333 respectively disposed at both ends of the second screw 332, and a second motor 334 connected to the second screw 332. Part of the structure of the push block 331 is disposed between the baffle 32 and the support block 31. The baffle 32 is slidably disposed in the groove. The support seats 333 are fixedly connected to the vehicle body 20 and rotatably connected to the second screw 332. Specifically, the pushing assembly 33 can precisely push the guardrail 40 to move, so that the guardrail 40 can be positioned directly below the gripping device 50. This makes the gripping more efficient, and the worker only needs to place the guardrail 40 on the support block 31 without needing to precisely position the guardrail 40, making the operation easier for the worker. The second motor 334 drives the second screw 332 to rotate, thereby causing the push block 331 to move along the second screw 332. During the movement, the push block 331 can abut against the side wall of the connecting piece 44, and then push the connecting piece 44 to move, thus slowly moving the entire guardrail 40. The sliding groove below the push block 331 cooperates with the baffle 32, so that the push block 331 can only move axially and will not rotate.

[0041] In this embodiment, the vehicle body 20 is equipped with a first photoelectric sensor 21 and a second photoelectric sensor 22. The first photoelectric sensor 21 is vertically mounted on the support block 31 near the drive device 60, facing the connection hole 43. The second photoelectric sensor 22 is horizontally mounted on the side wall of the vehicle body 20 near the first bolt 12, facing the first bolt 12. Specifically, the first photoelectric sensor 21 is mainly used to detect whether the guardrail 40 has moved into position on the support block 31. When the connection hole 43 is directly above the first photoelectric sensor 21, the light signal emitted by the first photoelectric sensor 21 can pass directly through the connection hole 43. At other times, the light emitted by the first photoelectric sensor 21 will be blocked by the connection plate 41. Therefore, the position of the guardrail 40 on the support block 31 can be determined by the change in this signal. When the position is determined to be accurate, the second motor 334 is controlled to stop running and immediately reverse, moving the push block 331 to the initial position. The second photoelectric sensor 22 is used to detect whether the vehicle body 20 has moved into position. When the light signal emitted by the second photoelectric sensor 22 is just blocked by the first bolt 12, it can be determined that the position of the vehicle body 20 is appropriate. At other times, the light signal emitted by the second photoelectric sensor 22 will pass through the gap between the first bolts 12. The vehicle body 20 itself can be equipped with a power mechanism such as a motor or engine, or it can be moved by an external towing vehicle. In addition, the guide rail 61 can drive the drive device 60 and the guardrail 40 to move within a relatively long range. The first photoelectric sensor 21 and the second photoelectric sensor 22 can achieve efficient automated alignment and operation, thus eliminating the need for expensive and complex robotic arms.

[0042] In this embodiment, a suspended platform assembly 23 detachably connected to the vehicle body 20 is also included. The suspended platform assembly 23 includes a suspended platform body 231, a load-bearing rod 232 connected to the suspended platform body 231, a load-bearing plate 233 fixedly connected to the load-bearing rod 232, a mounting hole 234 opened on the load-bearing plate 233, and a connecting column 235 fixedly installed on the vehicle body 20. The suspended platform body 231 is located below the side of the bridge body 11, and the connecting column 235 is detachably inserted into the mounting hole 234. A horizontally arranged operating plate 24 is fixedly installed on the side wall of the vehicle body 20 near the first bolt 12. The side wall of the operating plate 24 is provided with a surrounding plate, and the operating plate 24 has an operating hole 25. The operating hole 25 is located directly above the first bolt 12. Specifically, since the nuts also need to be tightened onto the first bolt 12 and the second bolt 13, manual operation is still required. For the second bolt 332 and nut below the guardrail 40, a worker can stand inside the suspended platform 231 and enter below the guardrail 40 to perform the operation. It should be noted that, for safety reasons, the worker cannot stand directly below the guardrail 40 during the hoisting process by the grabbing device 50 and the drive device 60. Therefore, the worker can stand to one side of the suspended platform 231. After the first bolt 12 is inserted into the connecting hole 43, the worker can enter below the guardrail 40 to tighten the nut onto the second bolt 13. Then, the vehicle body 20 moves forward the distance of one guardrail 40. At this point, the operating hole 25 on the operating plate 24 is directly above the first bolt 12, allowing the worker on the operating plate 24 to tighten the nut onto the first bolt 12. In this way, several workers each perform their duties, requiring only small movements to efficiently install the guardrail 40.

[0043] Example 2

[0044] This embodiment provides a hoisting method for a hoisting device for installing bridge railings based on Embodiment 1, including the following operation steps;

[0045] (1) Place the guardrail on the support block on the vehicle body at the end away from the drive device, so that the fence is placed on the support block and the connecting piece is inserted between the baffle and the support block;

[0046] (2) The push assembly is used to push the guardrail toward one end of the drive device, wherein the second motor drives the second screw to rotate, so that the push block moves along the second screw and the push block pushes the guardrail to move. When the first photoelectric sensor detects that the connection hole is directly above it, the second motor stops rotating and rotates in the opposite direction so that the push block returns to the previous position.

[0047] (3) The vehicle body moves along the bridge body. When the second photoelectric sensor is blocked by the second bolt, the vehicle body stops moving.

[0048] (4) The grabbing device grabs a guardrail on the support block and moves it to the edge of the bridge body under the action of the drive device. Then the guardrail is lowered. At this time, the first bolt is inserted into the connecting hole and the second bolt is inserted into the connecting piece. The worker in the suspended basket body screws the nut into the second bolt and the worker on the operating plate screws the nut into the first bolt.

[0049] (5) Repeat steps (1)-(4).

[0050] 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 hoisting device for installing bridge railings, comprising a bridge body, a plurality of first bolts vertically disposed on the upper edge of the bridge body, and a plurality of second bolts horizontally disposed on the side of the bridge body, characterized in that: It includes a vehicle body located on the side of the bridge body near the first bolt, a support assembly located above the vehicle body, a plurality of guardrails erected on the support assembly, a gripping device for gripping the guardrails, and a drive device for driving the gripping device to move. The guardrail includes a connecting plate with a 7-shaped structure, a fence inclined on one side of the connecting plate, a connecting hole on the upper surface of the connecting plate, an N-shaped connecting piece vertically disposed at the lower end of the connecting plate, and a pair of connecting rods for connecting the fence and the connecting plate. The gripping device is used to grip the connecting rod, the first bolt corresponds to the connecting hole, and the second bolt corresponds to the connecting piece; The support assembly includes an elongated support block fixed to the vehicle body and a baffle on one side of the support block; the length direction of the baffle is parallel to the length direction of the support block, and the length direction of the support block is parallel to the length direction of the vehicle body; a gap is provided between the baffle and the support block, and the connecting piece is slidably disposed in the gap between the baffle and the support block; the upper surface of the support block is an inclined surface, and when the guardrail is placed on the upper surface of the support block, the connecting rod is in a horizontal state; the support assembly also includes a pushing assembly for pushing the guardrail to move along the length direction of the support block; The pushing assembly includes a push block, a groove formed on the lower side of the push block, a second screw threadedly connected to the push block, a pair of support seats respectively disposed at both ends of the second screw, and a second motor connected to the second screw; part of the push block is disposed between the baffle and the support block, the baffle is slidably disposed in the groove, the support seats are fixedly connected to the vehicle body, and the support seats are rotatably connected to the second screw.

2. The hoisting device for installing bridge railings according to claim 1, characterized in that: The length direction of the vehicle body is parallel to the length direction of the bridge body; The driving device includes a guide rail horizontally mounted on the vehicle body, a slider slidably mounted on the guide rail, a moving mechanism for driving the slider to move along the guide rail, a first motor fixedly mounted in the slider, a first screw mounted on the output shaft of the first motor, a sleeve threadedly connected to the first screw, and a driving rod fixedly connected to the side wall of the sleeve. The length direction of the guide rail is perpendicular to the length direction of the vehicle body, the first screw is vertically arranged, the sleeve is located above the slider, and the gripping device is fixedly located at the end of the drive rod away from the sleeve.

3. The hoisting device for installing bridge railings according to claim 2, characterized in that: A vertically arranged limiting rod is fixed on the slider, a limiting block is slidably provided on the outer wall of the limiting rod, and a top plate is fixed on the upper end of the limiting rod; The limiting block is fixedly connected to the side wall of the sleeve, and the first screw is rotatably connected to the top plate.

4. The hoisting device for installing bridge railings according to claim 2, characterized in that: The pair of connecting rods are horizontally arranged and parallel to each other; The gripping device includes a horizontally arranged pull rod connected to the drive rod, and a pair of clamping assemblies respectively located at both ends of the pull rod; one of the clamping assemblies is used to clamp one of the connecting rods.

5. The hoisting device for installing bridge railings according to claim 4, characterized in that: The clamping assembly includes a through hole at the end of the pull rod, a clamping plate slidably disposed in the through hole, and an electric push rod fixedly disposed on the pull rod; The length direction of the pull rod is perpendicular to the length direction of the connecting rod. The clamp is a horizontally arranged U-shaped structure with the open end of the clamp facing the end of the pull rod. The length direction of the electric push rod is parallel to the length direction of the pull rod, and the movable end of the electric push rod is fixedly connected to the clamp.

6. The hoisting device for installing bridge railings according to claim 1, characterized in that: The vehicle body is equipped with a first photoelectric sensor and a second photoelectric sensor; The first photoelectric sensor is vertically upward-facing at one end of the support block near the driving device, and the first photoelectric sensor is positioned towards the connection hole; The second photoelectric sensor is horizontally disposed on the side wall of the vehicle body near the first bolt, and the second photoelectric sensor is positioned facing the first bolt.

7. The hoisting device for installing bridge railings according to claim 6, characterized in that: It also includes a basket assembly that is detachably connected to the vehicle body; The suspended platform assembly includes a suspended platform body, a load-bearing rod connected to the suspended platform body, a load-bearing plate fixedly connected to the load-bearing rod, mounting holes opened on the load-bearing plate, and a connecting column fixedly installed on the vehicle body; the suspended platform body is located below the side of the bridge body, and the connecting column is detachably inserted into the mounting hole; A horizontally positioned operating plate is fixed to the side wall of the vehicle body near the first bolt. The side wall of the operating plate is provided with a surrounding plate, and the operating plate has an operating hole. The operating hole is located directly above the first bolt.

8. A lifting method based on the lifting device for bridge railing installation as described in claim 7, characterized in that, The operation steps include the following; (1) Place the guardrail on the support block on the vehicle body at the end away from the drive device, so that the fence is placed on the support block and the connecting piece is inserted between the baffle and the support block; (2) The push assembly is used to push the guardrail toward one end of the drive device, wherein the second motor drives the second screw to rotate, so that the push block moves along the second screw and the push block pushes the guardrail to move. When the first photoelectric sensor detects that the connection hole is directly above it, the second motor stops rotating and rotates in the opposite direction so that the push block returns to the previous position. (3) The vehicle body moves along the bridge body. When the second photoelectric sensor is blocked by the second bolt, the vehicle body stops moving. (4) The grabbing device grabs a guardrail on the support block and moves it to the edge of the bridge body under the action of the drive device. Then the guardrail is lowered. At this time, the first bolt is inserted into the connecting hole and the second bolt is inserted into the connecting piece. The worker in the suspended basket body screws the nut into the second bolt and the worker on the operating plate screws the nut into the first bolt. (5) Repeat steps (1)-(4).

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