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CN-121976472-A - Telescopic operation platform for steel bridge widening cantilever arm

CN121976472ACN 121976472 ACN121976472 ACN 121976472ACN-121976472-A

Abstract

The invention relates to the field of bridge construction, in particular to a telescopic operation platform for a steel bridge widening cantilever arm, which comprises a hanging part, a connecting part and a lower platform, wherein the lower platform and the hanging part are arranged on the same side of the connecting part, a mounting channel is arranged in the lower platform, a track and an overhanging platform with a running wheel are arranged in the mounting channel, and the telescopic operation platform is driven to stretch by a driving mechanism arranged on the side of the connecting part, so that the effective operation length of the operation platform can be adjusted, the widths of different sections of the widening cantilever arm of a curve can be flexibly matched, and the problem of insufficient operation coverage of a fixed-size platform is solved.

Inventors

  • WU JIANZHONG
  • HAN YAN
  • XIONG JINGTING
  • HUANG YUANLIANG
  • YANG SHAODONG
  • Kang Daowei
  • MEI XIAO
  • SONG PEICHAO
  • HUANG MINFU
  • HUANG YUANDONG

Assignees

  • 广西路桥工程集团有限公司

Dates

Publication Date
20260505
Application Date
20260326

Claims (10)

  1. 1. The telescopic operation platform for the steel bridge widening cantilever is characterized by comprising a hanging part (1), a connecting part (2) and a lower platform (3); The lower platform (3) and the hanging part (1) are arranged on the same side of the connecting part (2), and the distance between the lower platform (3) and the hanging part (1) is larger than the maximum thickness of the cantilever arm; The lower platform (3) is provided with a mounting channel (31), and the mounting channel (31) is arranged along the length direction of the lower platform (3); An overhanging platform (4) and a driving mechanism (5) are arranged in the mounting channel (31), a track (32) for mounting the overhanging platform (4) is arranged at the bottom of the mounting channel (31), and a running wheel (41) matched with the track (32) is arranged at the bottom of the overhanging platform (4); The driving mechanism (5) is arranged between the overhanging platform (4) and the connecting part (2) and is used for driving the overhanging platform (4) to move along the track (32).
  2. 2. A telescopic working platform for a widening cantilever of a steel bridge according to claim 1, characterized in that the driving mechanism (5) comprises a winch (51) arranged in the mounting channel (31), a first steel wire rope (52) is arranged on the winch (51), and the first steel wire rope (52) is connected with the overhanging platform (4).
  3. 3. The telescopic operation platform for the steel bridge widening cantilever arm according to claim 2, wherein a second steel wire rope (53) is further arranged on the winch (51), a first fixed pulley (33) is arranged at one end, away from the connecting portion (2), of the lower platform (3), a movable pulley block (42) is arranged at one end, close to the connecting portion (2), of the overhanging platform (4), and the second steel wire rope (53) bypasses the first fixed pulley (33) and the movable pulley block (42) and then is connected with the end portion of the lower platform (3).
  4. 4. A telescopic working platform for a widening cantilever of a steel bridge according to claim 3, wherein the movable pulley block (42) comprises two movable pulleys (421), and the two movable pulleys (421) are separately arranged at two sides of the end part of the overhanging platform (4).
  5. 5. A telescopic working platform for a widening cantilever of a steel bridge according to claim 3, characterized in that the winch (51) is provided with a first wire wheel (511) and a second wire wheel (512), the diameter of the first wire wheel (511) is D, the diameter of the second wire wheel (512) is D, d=2d, the first wire rope (52) is connected to the first wire wheel (511), and the second wire rope (53) is connected to the second wire wheel (512).
  6. 6. A telescopic working platform for a steel bridge widening cantilever according to claim 3, characterized in that a first cross rod (34) and a second cross rod (35) which are parallel to each other are arranged in the mounting channel (31), the winch (51) is arranged on the first cross rod (34), the second cross rod (35) is arranged between the overhanging platform (4) and the first cross rod (34), a second fixed pulley (36) is arranged on the second cross rod (35) at a position corresponding to the winch (51), a third fixed pulley (37) is arranged at the end part of the second cross rod (35) connected with the lower platform (3), and the second steel wire rope (53) sequentially bypasses the second fixed pulley (36), the third fixed pulley (37), the first fixed pulley (33) and the movable pulley block (42).
  7. 7. The telescopic operation platform for the steel bridge widening cantilever arm according to claim 1, wherein an overhanging guardrail (43) is arranged at the end part of the overhanging platform (4), a platform guardrail (38) is arranged at the top of the lower platform (3), and a plurality of steel rope railings (44) are connected between the overhanging guardrail (43) and the platform guardrail (38).
  8. 8. Telescopic working platform for a widening cantilever of a steel bridge according to claim 1, characterized in that the lower platform (3) is provided with a baffle (39) extending into the mounting channel (31), and the end of the overhanging platform (4) close to the connecting part (2) is provided with a limiting plate (45) for abutting against the baffle (39).
  9. 9. Telescopic working platform for a widening cantilever of a steel bridge according to any one of claims 1-8, wherein a walkway (21) is provided in the connecting part (2), which walkway (21) is arranged in the height direction of the connecting part (2).
  10. 10. The telescopic operation platform for the steel bridge widening cantilever according to claim 9, wherein a plurality of climbing rods (22) are arranged on one side of the connecting portion (2), and the plurality of climbing rods (22) are arranged in a height direction of the connecting portion (2).

Description

Telescopic operation platform for steel bridge widening cantilever arm Technical Field The invention relates to the field of bridge construction, in particular to a telescopic operation platform for a steel bridge widening cantilever arm. Background With the rapid development of urban bridge construction, steel structure bridges are widely used due to the advantages of convenient construction, light and handy structure, flexible modeling and the like. In modern steel bridge design, in order to meet the traffic demands of non-motor vehicles and pedestrians, an overhanging cantilever structure is often adopted as a supporting member of a sidewalk or a non-motor vehicle lane. In order to further improve the bridge landscape effect, part of the steel bridge cantilever arms are designed to be in a curve widening mode, namely, the width of the cantilever arms is gradually changed in the longitudinal extension process of the bridge, so that smooth visual modeling is formed. However, in the sectional installation construction process, a large number of transverse butt welds exist on the curve widening cantilever arm, and high-altitude operations such as welding, polishing, coating and the like are required. At present, the steel bridge cantilever arm construction adopts the operation platform of fixed size more, and this type of platform simple structure generally, size are fixed, can't adapt to the construction space demand that cantilever arm width changes and bring. In curve widening cantilever construction, a fixed-size platform often cannot completely cover a working surface, so that constructors need to frequently move or set up an auxiliary platform, the construction efficiency is affected, and the safety risk of high-altitude operation is increased. Therefore, the cantilever arm working platform with the fixed size cannot adapt to the construction working condition of the curve-widened cantilever arm, so that the working coverage is insufficient, the construction efficiency is low and the safety risk is high. At present, a special working platform capable of flexibly adjusting the length of the platform and adapting to the width change of the cantilever arm does not exist in the field. Therefore, it is needed to develop a working platform that can be telescopically adjusted according to the width of the cantilever arm, so as to improve the adaptability, safety and construction efficiency of the wide cantilever arm construction of the steel bridge. Disclosure of Invention The invention aims to solve the technical problems that in the prior art, a cantilever operation platform with a fixed size cannot adapt to curve widening cantilever construction, so that the operation coverage is insufficient, the efficiency is low and the safety risk is high. The invention provides a telescopic operation platform for a steel bridge widening cantilever arm, which comprises a hanging part, a connecting part and a lower platform, wherein the hanging part is connected with the lower platform; The lower platform and the hanging part are arranged on the same side of the connecting part, and the distance between the lower platform and the hanging part is larger than the maximum thickness of the cantilever arm; the lower platform is provided with a mounting channel, and the mounting channel is arranged along the length direction of the lower platform; An overhanging platform and a driving mechanism are arranged in the mounting channel, a track for mounting the overhanging platform is arranged at the bottom in the mounting channel, and a running wheel matched with the track is arranged at the bottom of the overhanging platform; the driving mechanism is arranged between the overhanging platform and the connecting part and is used for driving the overhanging platform to move along the track. When the telescopic operation platform for the steel bridge widening cantilever arm is used, the hanging part is spanned and fixed on the cantilever arm of the steel bridge, so that the lower platform is positioned below the cantilever arm, and when the cantilever arm sections with different widths are required to be adapted to operate, the driving mechanism is operated to drive the overhanging platform to extend out along the track in the installation channel in the lower platform, so that the effective operation length of the whole operation platform is adjusted to match the actual width of the cantilever arm, and a stable and adjustable working surface is provided for constructors. Preferably, the driving mechanism comprises a winch arranged in the installation channel, a first steel wire rope is arranged on the winch, and the first steel wire rope is connected with the overhanging platform. The device directly pulls the overhanging platform by winding and unwinding the steel wire rope through the winch, provides a driving mode which has simple structure, centralized power and easy control, and is convenient to implement and operate. Preferab