CN-122013668-A - Self-locking control device for 2500 m-class suspension bridge, bracket system and bracket self-locking method

CN122013668ACN 122013668 ACN122013668 ACN 122013668ACN-122013668-A

Abstract

The invention provides a self-locking control device for a 2500 m-class suspension bridge, a bracket system and a bracket self-locking method, and belongs to the technical field of suspension bridge catwalk construction; the magnetic control self-locking mechanism is used for receiving control signals of the microprocessor and carrying out magnetic control self-locking or unlocking on the locked device of the suspension bridge catwalk, and the microprocessor is used for receiving position data of the positioning assembly and generating self-locking control signals to control the magnetic control self-locking mechanism to finish self locking. The invention utilizes the triangular structure of the three-dimensional framework and combines the two groups of rollers on one side to respectively clamp the upper side and the lower side of the bearing cable of the bracket to form a double-wheel limiting structure, thereby greatly improving the wind resistance stability and the bearing capacity and avoiding the problems that the traditional plane bracket is easy to deviate or the gravity center is unstable.

Inventors

ZHAO FENG
LI WEISHENG
GENG XIANGYUN
LI XUDONG
WANG YIFAN
CHEN XIN
Lu Hangchi
RUAN JING
SHI MEILING
GAO QIN
LI JINWANG
LI HAORAN
GUO LIFEI
LI CHAOCHENG
LIU HONGYU

Assignees

中交二公局华东建设有限公司
江苏省交通工程建设局

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. The self-locking control device for the 2500 m-level suspension bridge is characterized by comprising a positioning assembly, a magnetic control self-locking mechanism (4) and a microprocessor (5); the positioning assembly is used for acquiring the position data of the locked device of the suspension bridge catwalk in real time and transmitting the acquired position data to the microprocessor (5); the magnetic control self-locking mechanism (4) is used for receiving a control signal of the microprocessor (5) and carrying out magnetic control self-locking or unlocking on a locked device of the suspension bridge catwalk; a microprocessor (5) for receiving the position data of the positioning assembly and based on the position data Judging the moving distance D real of the locked device, comparing the moving distance D real with the preset distance D set , and when |D real When D set is less than or equal to 0.03m, a self-locking control signal is sent to the magnetic control self-locking mechanism (4) to control the magnetic control self-locking mechanism (4) to finish self locking, wherein the magnetic control self-locking mechanism is provided with a magnetic control self-locking mechanism Wherein a is a coefficient, b is a constant, values of a and b are obtained according to a suspension bridge main cable setting drawing, x 0 is an initial horizontal coordinate of a locked device, x 1 is a horizontal coordinate of a real-time position of the locked device, and x is position data of a positioning component.
2. The self-locking control device for 2500 m-class suspension bridge according to claim 1, wherein the positioning assembly is a GNSS positioning device (3) for monitoring the horizontal and vertical coordinates of the locked device and transmitting to the microprocessor (5).
3. The 2500 m-class self-locking control device for a suspension bridge according to claim 1, wherein the magnetic control self-locking mechanism (4) at least comprises a locking block (41), a wedge-shaped clamping piece (42) and an electromagnetic control module (44), the wedge-shaped clamping piece (42) is arranged in the locking block (41) and can slide in the locking block (41), and the electromagnetic control module (44) is arranged in the locking block (41) and is used for controlling the wedge-shaped clamping piece (42) to be snapped and self-locked or unlocked by electromagnetic force.
4. A self-locking control device for 2500 m-class suspension bridge according to claim 3, characterized in that said wedge-shaped clip (42) comprises an upper clip (421) and a lower clip (422) fitted on the lock block (41), said upper clip (421) and lower clip (422) each having a wedge angle of not less than 30 °, and a sliding distance within the lock block (41) of not more than 0.5cm.
5. The self-locking control device for 2500 m-class suspension bridge of claim 4, wherein concave-convex engaging teeth (43) are arranged on opposite engaging surfaces of the upper clamping piece (421) and the lower clamping piece (422), and the upper and lower engaging teeth (43) are engaged and locked.
6. The self-locking control device for the 2500 m-class suspension bridge, which is applicable to a 2500 m-class suspension bridge catwalk traction bracket system, is characterized by comprising a control platform (7), a bracket (1), a driving unit (6), a roller assembly (2) and the 2500 m-class suspension bridge according to any one of claims 1-5; The cable bearing roller (21) is arranged at the bottom of the bracket (1), the cable bearing roller (21) is arranged on the symmetrical central line of the plurality of hoisting rollers (22), and the cable bearing roller (21) and the hoisting rollers (22) are vertically distributed in a triangular mode; a drive unit (6) for powering the movement of the carriage (1); the 2500 m-level self-locking control device for the suspension bridge is symmetrically arranged at the top of the bracket (1), positions the bracket (1) on the bearing rope in real time, compares the moving distance D real with the preset distance D set , judges the power on-off condition, and further regulates and controls the electromagnetic force to determine the self-locking or unlocking state of the bracket (1) on the bearing rope; The control platform (7) is communicated with the 2500 m-level suspension bridge by using the self-locking control device, receives positioning information and unlocking information, and controls the driving unit (6) to drive the bracket (1) to move along the bearing rope.
7. The catwalk traction carriage system for 2500 m-class suspension bridges of claim 6, wherein said roller assemblies (2) are symmetrically disposed in front-to-back and side-to-side relation, such that the carriages (1) are uniformly distributed on the load-bearing cable.
8. The self-locking method for the 2500 m-class suspension bridge catwalk traction bracket is characterized by comprising the following steps of: S1, hoisting the catwalk traction bracket system suitable for 2500 m-class suspension bridge on a bearing rope on a construction platform at the top of a main rope tower of the suspension bridge, starting a catwalk magnetic control self-locking control device of the suspension bridge, and enabling the bracket (1) to be in an unlocking state on the bearing rope under the action of electromagnetic force; S2, after the control platform (7) receives positioning information and unlocking information of the 2500 m-level self-locking control device for the suspension bridge, the control driving unit (6) is controlled to drive the bracket (1) to slide along the bearing rope on the bearing rope, and the position of the bracket (1) is monitored in real time by the suspension bridge catwalk magnetic control self-locking control device in the moving process according to the positioning information and the unlocking information Determining the moving distance D real of the bracket (1), comparing the moving distance D real with the preset distance D set , and when |D real When D set is less than or equal to 0.03m, the magnetic control self-locking control device of the suspension bridge catwalk sends a self-locking control signal to finish self-locking so that the bracket (1) is locked and fixed on the bearing rope, and the driving unit (6) stops working.
9. The self-locking method for 2500m grade suspension bridge catwalk traction carriage as claimed in claim 8, wherein said step S2 comprises: S2.1, a microprocessor (5) determines a design curve equation of a bearing rope and parameters a and b according to a suspension bridge design drawing, and marks the starting point of the bearing rope at the top of a main rope tower as the starting point of a bracket (1), a GNSS positioning device (3) collects the starting coordinates of the bracket (1), and the preset positions of the brackets (1) taking the main rope tower as the starting point are calculated through the line shape of the main rope; S2.2, a control platform (7) is communicated with a 2500 m-level suspension bridge by using a self-locking control device, after positioning information and unlocking information are received, a control driving unit (6) drives a bracket (1) to slide on a bearing rope along the bearing rope, and a GNSS positioning device (3) monitors a horizontal coordinate x i and a vertical coordinate y i of the bracket (1) in the moving process and transmits the horizontal coordinate x i and the vertical coordinate y i to a microprocessor (5); s2.3, the microprocessor (5) calculates the along-line moving distance from the initial position to the real-time position by utilizing a numerical integration method : S2.4, microprocessor (5) according to |D real D set is less than or equal to 0.03m, and judging that the bracket (1) moves to a preset position; s2.5, |D when it is determined that the carriage (1) has moved to the predetermined position real D set is less than or equal to 0.03m, sending a self-locking control signal to the magnetic control self-locking mechanism (4), otherwise, returning to the step S2.2; s2.6, after the magnetic control self-locking mechanism (4) receives the self-locking control signal, the power supply signal is cut off to carry out magnetic control self-locking on the bracket (1).
10. The self-locking method for 2500m grade suspension bridge catwalk traction carriage according to claim 9, wherein the step S2.6 specifically comprises: S2.6.1, an electromagnetic control module (44) of the magnetic control self-locking mechanism (4) receives a self-locking control signal sent by the microprocessor (5), then cuts off a power supply, eliminates electromagnetic force, and the wedge-shaped clamping piece (42) is separated from the locking piece (41) and slides downwards in the locking piece (41) along the inclined direction of the bearing cable under the action of dead weight; S2.6.2, along with the enlargement of the wedge angle of the wedge-shaped clamping piece (42) in the sliding process, the sliding distance gradually reduces until the wedge-shaped clamping piece (42) is attached to the surface of the bearing rope to form a wedge-shaped occluding structure, and the magnetic control self-locking of the bracket (1) on the bearing rope is completed through the up-down occluding locking of the occluding teeth (43) matched with the concave-convex parts.

Description

Self-locking control device for 2500 m-class suspension bridge, bracket system and bracket self-locking method Technical field: the invention belongs to the technical field of suspension bridge catwalk construction, and particularly relates to a 2500 m-level self-locking control device for a suspension bridge, a bracket system and a bracket self-locking method. The background technology is as follows: The suspended bridge catwalk is used as a temporary working platform for working procedures such as main cable erection, cable clamp installation and the like, and the core bearing structure is a catwalk bearing cable. Chinese patent CN 221460943U discloses a bracket structure for installing a suspension bridge catwalk bracket bearing cable, which comprises a main frame, a fixing seat is installed below one side of the main frame, the fixing seat is welded with the main frame, the fixing seat is in an H-shaped structure, a supporting shaft is installed at the upper half part of the fixing seat, a roller is connected with the outer side of the supporting shaft, the roller is connected with a supporting shaft bearing, a baffle is symmetrically installed at the outer side of the roller, friction lines are arranged on the outer wall of the roller, meanwhile, the friction lines are positioned between the baffles, and the friction lines are transverse lines. The structure is a common form of the catwalk bracket of the existing suspension bridge, and is characterized by relatively simple structure, and is suitable for medium-small span suspension bridges with smaller distance between main towers and auxiliary towers and more stable bearing rope stress. In the bridge, the two ends of the bearing rope are reliably anchored and limited by wind load, and the bracket has a certain risk of rollover or gravity center deviation when moving along the bearing rope. However, for ultra-large suspension bridges with a main span of more than or equal to 2500m, the existing bracket structure and the construction method thereof have obvious defects in terms of applicability and reliability, and are mainly characterized in the following aspects: 1. the problem of overrun of the sagging of the bearing rope is that the two ends of the bearing rope at the initial traction stage do not form stable anchoring, and the bearing rope is easy to sag greatly under the influence of dead weight. According to the clear requirements of the inland navigation standard, the highway bridge and culvert construction technical specification and the like, the channel clearance requirement during construction is more than or equal to 60m, so that the sagging amplitude of the bearing rope must be strictly controlled, the influence of stability, wind swing and the like of a bracket system hung on the bearing rope must be strictly controlled, and extremely high requirements on deformation resistance and wind vibration resistance are provided. 2. The traditional bracket has insufficient stability, the traditional traction bracket is a plane frame structure welded by steel pipes, the overall rigidity and the spatial stability are limited, and the traditional traction bracket is difficult to adapt to high load and complex wind vibration environments born by the bearing cable of the super-large-span suspension bridge. Under the action of strong wind, the bracket is easy to swing and even unstably, and the walking precision and the fixing effect of the bracket on the bearing rope are seriously affected. Particularly in the aspect of the stability of the bracket, when the existing structure moves along a large-radian long-span bearing rope, the rollover resistance is weak, the gravity center adjusting mechanism is lost, and the deviation and even the overturning are extremely easy to be caused by uneven stress. 3. The construction efficiency is low, the traditional bracket erection is to drag the bracket bearing rope through the dragging device, then connect each bracket in series through the positioning rope, and adjust the position of the bracket by dragging the positioning rope to realize the positioning and the installation of the bracket, wherein the process has a large number of ropes and is easy to cause entanglement and knotting, the installation time of a single bracket is prolonged, and the whole construction efficiency is seriously influenced. In the locking and fixing link of the bracket, the prior art relies on friction lines and a baffle plate to simply limit, and lacks a high-efficiency and reliable rigid locking mechanism, so that the bracket is easy to slide under wind load or construction disturbance, and cannot meet the strict requirement on the positioning precision of a large-span catwalk. Therefore, in order to solve the above-mentioned problems, a traction bracket system with high stability, precise positioning and locking is needed to meet the comprehensive requirements of 2500 m-level super-large-span suspension bridge catwalk construction i