Steel pipe for automobile exhaust system

Abstract

The invention discloses a steel pipe for an automobile exhaust system. The steel pipe for the automobile exhaust system comprises a pipe body, wherein an air inlet and an exhaust hole are formed in two ends of the pipe body; at least two cooling pipes are arranged on the pipe body; through holes for the cooling pipes to penetrate through are formed in the side wall of the pipe body; each cooling pipe comprises an outer connecting pipe and an inner connecting pipe; the outer connecting pipes are located on the outer parts of the pipe body; the inner connecting pipes are located in the pipe body; a cooling inlet is formed in one end in each outer connecting pipe; a clamping table and a limiting ring are arranged at the other end in each outer connecting pipe; the clamping tables are radiallyabutted against the outer side wall of the pipe body; limiting rings are inserted into the through holes of the pipe body in a matching way; an inserting section and a clamping block are arranged atone end on each inner connecting pipe; a cooling outlet is formed in the other end on each inner connecting pipe; the inserting sections penetrate through the through holes and the limiting rings so as to be detachably inserted into the outer connecting pipes; and the clamping blocks are radially abutted against the inner side wall of the pipe body. The cooling efficiency of automobile exhaust inthe pipe body is improved, the service life of the pipe body is prolonged, and the steel pipe for the automobile exhaust system is simple in structure, convenient to disassemble and assemble, and lowin maintenance and replacement cost.

Description

technical field [0001] The invention relates to the field of auto parts, in particular to a steel pipe used in an auto exhaust system. Background technique [0002] The exhaust pipe is a part of the engine exhaust system. The exhaust system mainly includes the exhaust manifold, the exhaust pipe and the muffler. Generally, the three-stage catalytic converter that controls the emission of engine pollutants is also installed in the exhaust system. The exhaust The pipe generally includes a front exhaust pipe and a rear exhaust pipe. Existing exhaust pipes have a temperature rise due to the passage of high-temperature automobile exhaust, and long-term work reduces the service life of the exhaust pipes; [0003] The patent document with the application number 201720256063.2 discloses a high heat dissipation type automobile exhaust steel pipe, including a steel pipe body, the top of the steel pipe body is welded to the bottom of a connecting block, and the top of the connecting bl...

AI Technical Summary

Problems solved by technology

However, this kind of steel pipe has a complex structure, takes up a lot of space, is inconvenient to disassemble and assemble, and has high maintenance and replacement costs; the heat of the automobile exhaust is dissipated through the heat transfer of the steel pipe, and the temperature of the steel pipe body will still rise during the heat dissipation process. Thereby shortening the service life of the steel pipe body

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