Liquid nitrogen supply system used for bridge steel cable and having corrosion resisting and fire extinguishing functions

Abstract

The invention discloses a liquid nitrogen supply system with corrosion resistance and fire extinguishing functions for a bridge steel cable, which is mounted on a bridge and connected with a gas using point of the bridge. Comprising a liquid nitrogen tank, a liquid nitrogen vaporizer, a buffer filter, a nitrogen storage box and an air pump, an inlet of the liquid nitrogen vaporizer is communicated with an outlet of the liquid nitrogen tank; an inlet of the buffer filter is communicated with an outlet of the liquid nitrogen vaporizer; an inlet of the nitrogen storage box is communicated with an outlet of the buffer filter; the air pumping end of the air pump is communicated with an outlet of the nitrogen storage box, and the air supply end of the air pump is connected with an air supply hose which is communicated with an air using point. The nitrogen supply system is applied to a bridge, liquid nitrogen can be converted into nitrogen, corrosion prevention and dehumidification operation can be conducted on the bridge, and meanwhile the position where a fire occurs can be extinguished; the liquid nitrogen vaporizer, the buffer filter and the nitrogen storage box are sequentially used for treatment, so that the vaporization degree of nitrogen is high, efficient conversion can be achieved, and large-amount supply of the nitrogen is guaranteed.

Description

technical field [0001] The invention relates to the technical field of bridge steel cable maintenance and fire protection, and more specifically relates to a liquid nitrogen supply system for bridge steel cables with both corrosion resistance and fire extinguishing functions. Background technique [0002] The sling is a force-bearing component composed of steel wires. At present, the sling protection used in China is mainly to isolate the steel wire from the external atmosphere, such as the PE sheath of the parallel steel wire sling and the paint coating of the steel wire rope sling. Even so, corrosion of steel wires in the sling cannot be avoided. The connection between the sling and the anchor head is often due to a large difference in stiffness. Under the action of reciprocating loads, the sling protective cover is most likely to be damaged, so corrosion often occurs at the connection between the sling and the anchor head. The steel wires of the sling system are all made...

AI Technical Summary

Problems solved by technology

However, the existing liquid nitrogen vaporization devices generally have incomplete vaporization, and the utilization rate of the heat exchange medium in most vaporization devices is not high, and recycling cannot be realized, which causes waste of resources

Moreover, although liquid nitrogen is good for storage, it is easy to cause objects to become brittle after liquid nitrogen comes into contact with frozen objects. If the liquid nitrogen cannot be effectively transformed, it will cause reverse damage

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