Exhaust pipe assembly method

Abstract

The invention discloses an exhaust pipe assembly method. The method comprises the following steps of 1) detecting a conical surface inclination angle of an upstream exhaust pipe by using a flanging detection tool, and detecting a conical surface inclination angle of a downstream exhaust pipe by using a bulged pipe detection tool; selecting an upstream exhaust pipe and a downstream exhaust pipe which reach the standard; 2) fitting the inner wall of a conical sealing gasket into a sealing gasket tool, and then tearing off a white protective film on the gluing surface of the outer wall of the conical sealing gasket; (3) clamping the sealing gasket tool on a flanged pipe opening of the upstream exhaust pipe; (4) pulling the sealing gasket tool out, and inserting a bulged pipe opening into the flanged pipe opening for concentric assembly; and (5) mounting a V-shaped clamp at the joint of the flanged pipe opening and the bulged pipe opening, and using a constant-torque electric gun for tightening. The qualified upstream exhaust pipe and the qualified downstream exhaust pipe are screened through the flanging detection tool and the flanging detection tool, the conical sealing gasket is fitted into the sealing gasket tool, the concentricity of the conical sealing gasket and the upstream exhaust pipe is guaranteed, and the problem of smoke leakage at the assembly position after the upstream exhaust pipe and the downstream exhaust pipe are assembled is solved.

Description

technical field [0001] The invention belongs to the technical field of exhaust pipe assembly, and in particular relates to an assembly method of an exhaust pipe. Background technique [0002] In order to promote the development of the automobile industry and improve air quality, the heavy-duty truck field has now implemented the National Sixth Stage Motor Vehicle Pollutant Emission Standard (referred to as the National Sixth Standard) to strengthen the prevention and control of motor vehicle pollution. Domestic diesel engine National VI emission generally adopts EGR (Exhaust Gas Recirculation, exhaust gas recirculation) + DOC (Diesel Oxidation Catalyst, oxidation catalytic converter) + DPF (Diesel Particulate Filter, particulate filter) + SCR (Selective Catalytic Reduction, Selective catalytic reduction) technology route, in which DPF is used to reduce most of the particulate matter produced by diesel engines. [0003] When the DPF is working, the exhaust gas flows through ...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies and defects in the prior art, the purpose of the present invention is to provide an assembly method for an exhaust pipe; by screening qualified upstream exhaust pipes, downstream exhaust pipes, and ensuring that the conical gasket and the upstream exhaust pipe The concentricity of the pipe solves the problem of smoke leakage at the assembly place after the assembly of the upstream exhaust pipe and the downstream exhaust pipe, thereby ensuring the temperature in the exhaust pipe and ensuring the active regeneration function.

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