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Anti-corrosion device and method for main cable of suspension bridge

A technology for anti-corrosion and suspension bridges, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of shortened bridge life, failure to realize automatic control, bridge safety threats, etc., achieve the effect of increasing costs and solving electrochemical corrosion

Active Publication Date: 2018-08-28
JIANGSU CUMT DAZHENG SURFACE ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a certain effect on slowing down the corrosion rate of the main cable, but with the increase of the service period of the bridge, the corrosion rate of the main cable will gradually increase, which not only shortens the life of the bridge, but also poses a threat to the safety of the entire bridge
Moreover, the traditional bridge dehumidification and anti-corrosion method does not realize automatic control, and the dehumidification system is in a state of continuous operation, resulting in a great waste of energy

Method used

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  • Anti-corrosion device and method for main cable of suspension bridge
  • Anti-corrosion device and method for main cable of suspension bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the outside of the main cable of the suspension bridge is sealed with sealant, and a closed space is formed inside; the first and second spans 61 and 62 on both sides are 360m and 480m respectively, and the cable diameter is 852mm; the middle span 7 is 1200m, and the cable diameter is 852mm .

[0034] During implementation, two sets of anti-corrosion devices of the present invention need to be installed on the main cable of the suspension bridge: a dehumidification and nitrogen-making anti-corrosion device 5 is respectively installed at 4 places of the two upper beams; Air intake clip 1 and two exhaust clips 2 located on both sides; four air intake clips 1 and five exhaust clips 2 are set on each cable of mid-span 7, and the air intake clip 1 and exhaust clip 2 are arranged alternately.

[0035] According to the characteristics of the main cable of the suspension bridge, the air supply distances of the first and second spans 61 and 62 on bot...

Embodiment 2

[0038] General layout and figure 1 similar. The outside of the main cable of the suspension bridge is sealed by wrapping tape, and a closed space is formed inside, and two sets of anti-corrosion devices of the present invention need to be installed. Among them, the first and second spans 61 and 62 on both sides are 460m and 491m respectively, and the cable diameters are 886mm and 901mm respectively. Each cable on both sides spans is respectively provided with an air intake clip 1 and two rows located on both sides of the air intake clip 1. Air clamp 2. The mid-span is 1480m, and its cable diameter is 886mm. Each cable of the mid-span is provided with four intake clamps 1 and five exhaust clamps 2, and the intake clamps 1 and exhaust clamps 2 are arranged alternately. A dehumidification and nitrogen production anti-corrosion equipment 5 is respectively installed at the two upper beams 4 .

[0039] According to the characteristics of the main cable of the suspension bridge, t...

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Abstract

The invention discloses a suspension bridge main cable anti-corrosion device and method. The device includes a gas incoming clamp, gas discharging clamps, a dehumidification and nitrogen generation device and an automatic control system, wherein the gas incoming clamp and the gas discharging clamps sleeve a sealed main cable; temperature and humidity sensors are installed in the gas incoming clamp and the gas discharging clamps; the temperature and humidity sensors are connected with the automatic control system; the gas inlet of the gas incoming clamp is provided with a normally open type solenoid valve; the gas outlets of the gas discharging clamps are provided with normally closed solenoid valves; the normally open type solenoid valve and the normally closed solenoid valves are connected with the automatic control system; the dehumidification and nitrogen generation device includes a dehumidification unit and a nitrogen generation unit; the gas outlets of the dehumidification unit and the nitrogen generation unit are connected in parallel with a three-way control valve and then are connected with the gas inlet of the gas incoming clamp; and the dehumidification unit and the nitrogen generation unit are connected with the automatic control system. The suspension bridge main cable anti-corrosion device can monitor humidity and oxygen content of the internal space of the main cable and automatically select the operation mode of the dehumidification and nitrogen generation device so as to make the purity of nitrogen filling the main cable higher than 99%, and therefore, the service life of a bridge can be greatly prolonged.

Description

technical field [0001] The invention relates to an anti-corrosion device and method for a main cable of a suspension bridge, belonging to the technical field of bridge life-span protection. Background technique [0002] The main cable, the lifeline of the suspension bridge, consists of bundles of steel wire bundles made of multiple strands of high-strength galvanized steel wire. Due to the harsh operating environment of suspension bridges, mostly in high temperature and humid environments, in order to ensure the service life of the bridge, the corrosion protection of the main cable is particularly important. The corrosion rate of the main cable is determined by its environment, which is related to humidity, temperature and the existence of harmful media. For example: humidity is the decisive factor. When the relative humidity of the atmosphere is below 60%, the corrosion of the main cable is very slight; but when the relative humidity increases to a certain value, the corro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/16
CPCE01D19/16
Inventor 李鹏刘俊王波赵青青倪雅杨帆高海棠周春侠刘国彬陈天建
Owner JIANGSU CUMT DAZHENG SURFACE ENG TECH
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