Heat insulation cover for engine exhaust pipe and processing technology

Abstract

The invention provides a heat insulation cover for an engine exhaust pipe and a processing method. The heat insulation cover comprises a heat insulation body and a fastening device. The heat insulation body comprises a straight pipe section and an elbow section, and is of a multi-layer structure comprising a middle heat insulation layer, an inner heat insulation layer, an inner protection net and an outer heat insulation layer. Nano-micropore heat insulation materials such as nano-silica aerogel felt are adopted to serve as the middle heat insulation layer, the heat conductivity is low, and the heat insulation effect is good; with the fitting type flexible chambered face design, the heat insulation cover is in better fit with a pipe so as to cut off the space of heat loss; and effective contacting area between the inner layer surface of the cover and the outer wall of the pipe is increased, noise and vibration are reduced, and resonance caused by a gap between a shell wall and the inner layer of the cover when an engine operates is avoided. With the sectional type sewing design, the problem of difficult processing of common sewing is solved, the sewing time is saved, production and installing efficiency is improved, and production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of motor vehicle engine exhaust, in particular to an engine exhaust pipe heat insulation cover. Background technique [0002] After the engine exhaust pipe absorbs high-temperature gas, the temperature rises, and the heat is dissipated to the surroundings. In order to prevent the heat from damaging the parts around the pipe, a heat shield is added outside the exhaust pipe for heat insulation. However, traditional heat shields are often affected by Limited to problems such as material technology, the outer surface temperature is still high, the heat insulation effect is not ideal, and it is easy to accelerate the aging of parts and shorten the service life. Contents of the invention [0003] In order to solve the current situation that the heat insulation effect of the engine exhaust system pipe is not ideal, the present invention provides an engine exhaust pipe heat insulation cover, and adopts the followi...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the current situation that the heat insulation effect of the pipes of the engine exhaust system is not ideal, the present invention provides a heat insulation cover for the engine exhaust pipe, and adopts the following technical scheme:

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