CN-224214243-U - Linear horizontal installation non-road diesel engine catalytic muffler structure

CN224214243UCN 224214243 UCN224214243 UCN 224214243UCN-224214243-U

Abstract

The utility model discloses a horizontal installation non-road diesel engine catalytic muffler structure, wherein an air outlet hump of a DOC of a muffler oxidation catalytic assembly is connected with an air inlet horn of a DPF of a particle trapping assembly through a V-shaped clamp assembly, the air outlet hump of the DPF of the particle trapping assembly is connected with the air inlet horn of a mixer through the V-shaped clamp assembly, and an air outlet cylinder of the mixer is welded with an air inlet cylinder of a selective catalytic reduction SCR assembly through a transition cylinder. The catalytic muffler has the advantages of compact structure, high pollutant conversion efficiency, low surface temperature after treatment and high installation efficiency.

Inventors

WU PENG
XU JINGMING
ZHANG RAN
WANG BINBIN
GAO GUANGMING
WANG TIANDONG

Assignees

郑州精益达汽车零部件有限公司

Dates

Publication Date: 20260508
Application Date: 20250703

Claims (4)

1. A horizontal installation non-road diesel engine catalytic muffler structure of straight line type, its characterized in that: The catalytic muffler body structure is that an air outlet hump of the oxidation catalytic assembly DOC is connected with an air inlet horn of the particle trapping assembly DPF through a V-shaped clamp assembly, the air outlet hump of the particle trapping assembly DPF is connected with an air inlet horn of a mixer through the V-shaped clamp assembly, an air outlet cylinder of the mixer is welded with an air inlet cylinder of the selective catalytic reduction SCR assembly through a transition cylinder; the air inlet cone cover heat shield is welded to the catalytic muffler body; The outer heat shield is fixed on the air inlet cone cover heat shield and the catalytic muffler body through bolts; The differential pressure sensor is fixed to the bracket of the outer heat shield through bolts and is fastened to the differential pressure sensor base on the catalytic muffler body through an air taking steel pipe and an air taking rubber pipe; the urea nozzle is fixed to a nozzle base on the catalytic muffler body through bolts, and the urea nozzle heat shield is fixed to the outer heat shield through bolts; The nitrogen-oxygen sensor bracket is welded on the outer heat shield, and the nitrogen-oxygen sensor shield are fixed on the nitrogen-oxygen sensor bracket through bolts; One end of the air outlet cone cover heat shield is fixed on the outer heat shield through bolts, and the other end is welded on the catalytic muffler body.
2. An in-line horizontally mounted non-road diesel engine catalytic muffler structure as defined in claim 1, wherein: the air inlet cone cover heat insulation cotton is riveted to the air inlet cone cover heat insulation cover; The sensor heat insulation cotton is wrapped at the gas taking port, and the pressure difference sensor heat insulation cotton is arranged between the brackets of the outer heat shield through bolts; The heat insulation cotton of the air outlet cone cover is riveted to the heat insulation cover of the air outlet cone cover; the heat insulation cotton of the air outlet end cover is placed in an air outlet cavity of the selective catalytic reduction SCR assembly; the SCR heat shield is welded on the outer side of a cylinder of the selective catalytic reduction SCR assembly to form a heat insulation cavity, and SCR heat insulation cotton is filled in the cavity; The heat shield of the mixer is welded on the outer side of the mixer cylinder body to form a heat-insulating cavity, and the heat-insulating cotton of the mixer is filled in the cavity; the DPF heat shield is welded on the outer side of the DPF cylinder of the particle trapping assembly to form a heat insulation cavity, and DPF heat insulation cotton is filled in the cavity; The DOC heat shield is welded on the outer side of the DOC cylinder of the oxidation catalytic assembly to form a heat-insulating cavity, and the cavity is filled with DOC heat-insulating cotton; The heat insulation cotton of the air inlet end cover is placed in the air inlet cavity of the oxidation catalytic assembly DOC.
3. The in-line horizontally mounted non-road diesel engine catalytic muffler structure of claim 1, wherein the integrated wiring harness is connected to the temperature sensor, the differential pressure sensor, the urea nozzle, the nitrogen-oxygen sensor, and is fixed to the outer heat shield by the wiring harness mounting bracket and the wiring harness fixing clip.
4. A straight horizontal mounting non-road diesel engine catalytic muffler structure as set forth in claim 1 wherein a plurality of whole vehicle mounting brackets are secured to the catalytic muffler body.

Description

Linear horizontal installation non-road diesel engine catalytic muffler structure Technical Field The utility model belongs to the technical field of tail gas emission purification technology and energy conservation and consumption reduction of an automobile engine, and particularly relates to a horizontal-installation non-road diesel engine catalytic muffler structure. Background The fourth stage emission regulations for off-road diesel engines are fully implemented after 12 months 2022, and each engine plant is going to reserve off-road diesel aftertreatment technology. The non-road diesel engine post-treatment technical route is mainly formed by combining an oxidation catalytic unit (DOC)/a particle catcher (DPF)/a selective catalytic reduction converter (SCR) in series, and compared with the traditional Chinese three-stage diesel engine post-treatment technology, the non-road diesel engine post-treatment technology has only a silencing structure, and the part cost and the occupied whole vehicle space are greatly changed. The engine displacement of a part of harvesters in non-road national four-machine is 9-12L, the engine displacement is large, the installation space is compact, small-section vertical products cannot be installed, meanwhile, the surface temperature of the catalytic muffler is required to be low, and the roasting and melting risks of surrounding parts are reduced. In order to solve the problems, a horizontal installation non-road diesel engine catalytic muffler with a larger cross section is developed. Disclosure of Invention The utility model provides a horizontal-installation non-road diesel engine catalytic muffler structure, which aims to solve the defects of the prior art, has compact structure and high pollutant conversion efficiency, reduces the surface temperature of post-treatment and improves the installation efficiency of the whole vehicle. The utility model adopts the technical scheme that: A horizontal-installation non-road diesel engine catalytic muffler structure in a straight shape, The catalytic muffler body structure is that an air outlet hump of the oxidation catalytic assembly DOC 2.1 is connected with an air inlet horn of the particle trapping assembly DPF 2.3 through a V-shaped clamp assembly, the air outlet hump of the particle trapping assembly DPF 2.3 is connected with an air inlet horn of the mixer 2.4 through a V-shaped clamp assembly, and an air outlet cylinder of the mixer 2.4 is welded with an air inlet cylinder of the selective catalytic reduction SCR assembly 2.6 through a transition cylinder 2.5; the air inlet cone cover heat shield 1.3 is welded to the catalytic muffler body 1.1; The outer heat shield 1.4 is fixed on the air inlet cone cover heat shield 1.3 and the catalytic muffler body 1.1 through bolts; The differential pressure sensor 1.8 is fixed on a bracket of the outer heat shield 1.4 through bolts and is fastened on the differential pressure sensor base on the catalytic muffler body 1.1 through the gas taking steel pipe 1.6 and the gas taking rubber pipe 1.7; The urea nozzle 1.10 is fixed to the nozzle base on the catalytic muffler body 1.1 through bolts, and the urea nozzle heat shield 1.11 is fixed to the outer heat shield 1.4 through bolts; The nitrogen-oxygen sensor bracket 1.12 is welded on the outer heat shield 1.4, and the nitrogen-oxygen sensor 1.13 and the nitrogen-oxygen sensor shield 1.14 are fixed on the nitrogen-oxygen sensor bracket 1.12 through bolts; One end of the air outlet cone cover heat shield 1.15 is fixed on the outer heat shield 1.4 through bolts, and the other end is welded on the catalytic muffler body 1.1. Installing heat insulation cotton: The air inlet cone cover heat insulation cotton 1.2 is riveted to the air inlet cone cover heat insulation cover 1.3; the sensor heat insulation cotton 1.21 is wrapped at the gas taking port, the pressure difference sensor heat insulation cotton 1.9 is placed between the supports of the outer heat insulation cover 1.4, and the pressure difference sensor 1.8 is fixed to the supports through bolts; The air outlet cone cover heat insulation cotton 1.16 is riveted to the air outlet cone cover heat insulation cover 1.15; the heat insulation cotton 2.7 of the air outlet end cover is placed in the air outlet cavity of the selective catalytic reduction SCR assembly 2.6; The SCR heat shield 2.8 is welded on the outer side of the cylinder body of the selective catalytic reduction SCR assembly 2.6 to form a heat-insulating cavity, and the cavity is filled with SCR heat-insulating cotton 2.9; the mixer heat shield 2.10 is welded on the outer side of the mixer 2.4 cylinder to form a heat insulation cavity, and the heat insulation cavity is filled with mixer heat insulation cotton 2.11; The DPF heat shield is welded 2.12 to the outer side of a cylinder body of the particle trapping assembly DPF 2.3 to form a heat insulation cavity, and DPF heat insulation cotton 2.13 is filled in the cavity; The