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

A suspension bridge and main cable technology, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of frequent replacement of dehumidification element runners, increased system cost, high maintenance cost, etc., and achieves simple structure, low energy consumption and easy implementation Effect

CN101831658AInactive Publication Date: 2010-09-15JIANGSU PROVINCIAL COMM PLANNING & DESIGN INST +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-09-15
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment 1

[0013] refer to figure 1 As shown, Embodiment 1 of the present invention: a drying and anticorrosion system for the main cable of a suspension bridge, including between the appropriate gaps in the longitudinal direction where the closed sheath layer is covered on the outer periphery of the main cable 1, and an air intake for dredging the inner side is provided. Cover 2 and exhaust cover 3, an overpressure automatic exhaust valve 11 is installed on the upper part of the exhaust cover 3, and a manual exhaust valve 4 is installed on the lower part of the exhaust cover 3, and the dry air is sent to the main cable by the above-mentioned intake cover 2 The gap of the inner steel wire is then discharged by the overpressure automatic exhaust valve 11 and the manual exhaust valve 4 on the exhaust hood 3. Rotary dehumidifier 5, Roots blower 6, air inlet 7, regulating valve 8, air leakage along the way 9, frequency converter 10.

[0014] The above-mentioned dry gas is air or nitrogen w...