Drying and corrosion prevention method and system of main cable of suspension bridge

Abstract

The invention relates to a drying and corrosion prevention method of a main cable of a suspension bridge. The main cable of the suspension bridge is placed in a closed tubular jacket layer to ensure that the main cable of the suspension bridge is isolated with outside moist air. In an initial operation stage, a main cable dehumidification system is in a dehumidification stage; at the moment, vent valves on the lower part of a vent clamp of the main cable jacket layer of the suspension bridge are opened, and a larger flow of dry air is sent into the jacket layer from an air inlet clamp of the main cable jacket layer and then exhausted from a vent port of the vent clamp through gaps of main cable steel wires so that water in the main cable is drained as soon as possible; after the water in the main cable is exhausted, the main cable dehumidification system enters a maintenance stage; in the maintenance stage, all the vent valves on the vent clamp of the main cable jacket layer are closed to ensure that the main cable jacket layer forms a closed space; Through detecting the pressure of the vent clamp and controlling a dehumidification device and a blowing-in device, a small amount of dry air is sent to ensure that the pressure of the vent port of the main cable jacket layer of the suspension bridge is in a state of slightly exceeding the atmospheric pressure so as to maintain the main cable to be dry.

Description

1. Technical field [0001] The invention relates to a drying and anticorrosion method and system for a main cable of a suspension bridge, which are used to remove moisture inside the main cable, keep the inside of the main cable dry, and minimize operating energy consumption during the maintenance period. 2. Background technology [0002] The main cable is one of the most important stress-bearing components of the suspension bridge. It is called the "lifeline". The service life of the suspension bridge directly determines the service life of the suspension bridge. Judging from the inspection of the main cables of many suspension bridges abroad, although the traditional main cable anti-corrosion method is effective in the short term, it has not completely solved the anti-corrosion problem, and has resulted in high follow-up maintenance costs. Chinese utility model patent "Anti-corrosion device for load-bearing cables" (patent number: ZL01237379.6) proposes an anti-corrosion d...

AI Technical Summary

Problems solved by technology

However, from the analysis of the operation situation, the system still needs the dehumidification air supply system to work and discharge from the exhaust port of the exhaust clamp in the maintenance stage of the main cable drying period. It belongs to the direct current dehumidification system and consumes a lot of energy. Frequent, high maintenance costs; in order to overcome the above problems, there are also bridges that use closed dehumidification systems during the maintenance period, that is, by setting (such as image 3 As shown) the relatively dry air discharged from the exhaust port of the recovery pipe is sent to the dehumidification device for recycling. In this way, the dehumidification device only needs to deal with a small amount of fresh air that supplements the leakage, and the conveying system can run at a low speed, which can greatly reduce The operating energy consumption of the system, but this kind of system increases the cost of the system

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