Heat preservation and exhaust corrugated pipe structure

Abstract

The invention relates to a heat preservation and exhaust corrugated pipe structure which comprises a heat preservation outer pipe and a corrugated inner pipe, and the two ends of the heat preservation outer pipe are fixedly connected with the two ends of the corrugated inner pipe; the heat preservation outer pipe comprises an outer layer, a middle layer and an inner layer; and the inner layer wraps the outer surface of the corrugated inner pipe, the middle layer wraps the outer surface of the inner layer, the outer layer wraps the outer surface of the middle layer, and the outer layer, the middle layer and the inner layer are relatively fixed. Compared with the prior art, the structure and coating materials of an exhaust corrugated pipe are improved, a stainless steel woven belt at the outer layer provides durable heat preservation and a certain damping effect for the outermost layer, and a flexible basalt needled felt heat preservation layer at the middle layer provides good heat preservation performance and a radial damping effect; a basalt fiber woven belt at the inner layer provides a heat preservation and insulation function and ensures axial tensile elasticity; and the heat preservation effect of the corrugated pipe is improved on the premise that the damping effect is guaranteed, and the inner layer material and the outer layer material have good durability and are not prone to being damaged.

Description

technical field [0001] The invention relates to an exhaust bellows, in particular to a thermal insulation exhaust bellows structure. Background technique [0002] With the advancement of technology, cars have become more and more popular and have become a common means of transportation. As the requirements for fuel economy and environmental protection are getting higher and higher, the treatment of automobile exhaust has attracted more and more attention. For energy saving and environmental protection, the heat of automobile exhaust is often recycled to heat the intake air of the automobile and provide temperature for the conversion reaction of exhaust gas in the SCR, etc. Heating the intake air of the automobile can increase the gasification temperature of the fuel to Reduce the emission of harmful pollutants, relying on the heat of automobile exhaust to convert toxic nitrogen oxides (NO x ) into nitrogen and water, which can reduce pollutant emissions and improve emissio...

AI Technical Summary

Problems solved by technology

However, since the insulation layer (the basalt knitted sleeve) is covered outside the steel wire layer, the insulation layer is easy to wear and tear, which will reduce the heat insulation effect, be easily damaged, and have a short service life. Moreover, the shock absorption effect needs to be improved

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