Cable-stayed bridge inhaul cable intelligent dehumidifying and deicing system and method

Abstract

The invention discloses a cable-stayed bridge inhaul cable intelligent dehumidifying and deicing system and method and relates to the field of bridge operation safety protection. The system comprisesan air feeding unit, a monitoring unit and a control unit. The air feeding unit comprises a high-pressure dry air production device and an air heating device. The high-pressure dry air production device is used for generating high-pressure dry air and driving the generated high-pressure dry air to pass through the air heating device, enter inhaul cables from the bottom ends of the inhaul cables and flow out from the top ends of the inhaul cables. The monitoring unit comprises humidity sensors and temperature sensors, all of which are arranged in the inhaul cables, and the monitoring unit further comprises humidity sensors, temperature sensors and icing sensors, all of which are arranged on the outer surface layers of the top ends of the inhaul cables. The control unit is electrically connected with the air feeding unit and the monitoring unit. The inhaul cables can be automatically dehumidified and deiced according to external climate changes, the inhaul cables are protected against corrosion, and meanwhile the inhaul cables are effectively prevented from being iced.

Description

technical field [0001] The invention relates to the field of bridge operation safety protection, in particular to an intelligent dehumidification and deicing system for cables of a cable-stayed bridge and an intelligent dehumidification and deicing method for cables of a cable-stayed bridge. Background technique [0002] As the "throat" of the transportation system, long-span bridges are of great significance to their safe operation, so they are highly valued by bridge management and maintenance departments. Cable-stayed bridges are one of the main bridge types of long-span bridges in my country's transportation system. At present, more than 200 cable-stayed bridges have been built in China, accounting for about one-third of the total number of cable-stayed bridges in the world. [0003] During the operation of cable-stayed bridges, rain, snow, icing and other phenomena caused by climate in the central and northern regions of my country are likely to cause major hidden dange...

AI Technical Summary

Problems solved by technology

For the cable, when the external environment is relatively humid, the external moisture will invade the interior of the cable. If it is not treated in time, it will cause the corrosion of the steel wire inside the cable, reduce the bearing capacity and durability of the cable, and even cause cable damage. Major safety accident of broken bridge

The invention patent cable dehumidification and anticorrosion system (ZL201310146524.7) proposes a purpose of using dry air to protect the steel wire bundles inside the cable, but the patent does not mention how to adjust the protection of the cable when the external climate changes

[0004] In addition, some rain and snow will remain on the cables after the rainy and snowy weather, and it will freeze when the temperature is lower than 0°C; It is still above 0°C or there is no icing phenomenon, but the high altitude of the cable near the bridge tower is already below 0°C, the rain and snow left on the cable condenses into ice, and the icing on the surface of the cable will not only damage the structure of the cable In addition to causing damage, the ice cubes condensed on the cable will be affected by external factors such as temperature rise, wind blowing or normal vibration of the cable, causing them to fall from the cable. , will cause major safety hazards to the vehicles running normally on the bridge deck, and even cause a series of traffic accidents in severe cases, causing major personal and property losses. The resulting public opinion is extremely unfavorable to social stability

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