Linear horizontal installation non-road diesel engine catalytic silencer structure

Abstract

The utility model discloses a linear horizontally-installed non-road diesel engine catalytic silencer structure. An air outlet hump of a silencer oxidation catalysis assembly DOC is connected with an air inlet horn of a particle trapping assembly DPF through a V-shaped clamp assembly. An air outlet hump of the DPF assembly is connected with an air inlet horn of the mixer through a V-shaped clamp assembly; and a gas outlet cylinder of the mixer is welded with a gas inlet cylinder of a selective catalytic reduction (SCR) assembly through a transition cylinder. The catalytic silencer is compact in structure, high in pollutant conversion efficiency, low in aftertreatment surface temperature and high in installation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle engine exhaust emission purification technology and energy conservation and consumption reduction technology, and specifically relates to a linear horizontally mounted non-road diesel engine catalytic muffler structure. Background Technology

[0002] The Stage IV emission regulations for non-road diesel engines will be fully implemented after December 2022, and engine manufacturers are making every effort to develop after-treatment technologies for non-road diesel engines. The after-treatment technology route for non-road diesel engines is mostly a series combination of an oxidation catalytic converter (DOC), a particulate filter (DPF), and a selective catalytic reduction converter (SCR). Compared to the Stage III emission standard which only had a muffler structure, the cost of parts and the space occupied in the vehicle have changed significantly. Some harvesters in non-road Stage IV machinery have engine displacements of 9-12L. Due to the large engine displacement and compact installation space, small-section, vertical products cannot be installed. At the same time, a low surface temperature of the catalytic muffler is required to reduce the risk of melting surrounding parts. To solve these problems, a larger cross-section, horizontally mounted, single-line non-road diesel engine catalytic muffler has been developed. Summary of the Invention

[0003] This utility model provides a horizontally mounted, single-line structure for a non-road diesel engine catalytic muffler, which aims to overcome the shortcomings of existing technologies, featuring a compact structure, high pollutant conversion efficiency, reduced aftertreatment surface temperature, and improved vehicle installation efficiency.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A horizontally mounted, single-line structure for a non-road diesel engine catalytic converter muffler.

[0006] The catalytic muffler body structure is as follows: the outlet hump of the oxidation catalytic converter 2.1 is connected to the inlet horn of the particulate filter assembly 2.3 via a V-shaped clamp assembly 2.2; the outlet hump of the particulate filter assembly 2.3 is connected to the inlet horn of the mixer 2.4 via a V-shaped clamp assembly; the outlet cylinder of the mixer 2.4 is welded together with the inlet cylinder of the selective catalytic reduction (SCR) assembly 2.6 via a transition cylinder 2.5.

[0007] The intake cone cover heat shield 1.3 is welded to the catalytic converter body 1.1;

[0008] The external heat shield 1.4 is fixed to the intake cone cover heat shield 1.3 and the catalytic converter body 1.1 by bolts;

[0009] Temperature sensor 1.5 is fastened to the temperature sensor base on the catalytic muffler body 1.1; differential pressure sensor 1.8 is fixed to the bracket of the outer heat insulation cover 1.4 by bolts, and fastened to the differential pressure sensor base on the catalytic muffler body 1.1 through gas intake steel pipe 1.6 and gas intake rubber hose 1.7.

[0010] The urea nozzle 1.10 is fixed to the nozzle base on the catalytic muffler body 1.1 by bolts, and the urea nozzle heat shield 1.11 is fixed to the outer heat shield 1.4 by bolts;

[0011] The nitrogen and oxygen sensor bracket 1.12 is welded to the outer heat insulation cover 1.4, and the nitrogen and oxygen sensor 1.13 and the nitrogen and oxygen sensor protective cover 1.14 are fixed to the nitrogen and oxygen sensor bracket 1.12 with bolts;

[0012] One end of the exhaust cone cover heat shield 1.15 is fixed to the outer heat shield 1.4 by bolts, and the other end is welded to the catalytic muffler body 1.1.

[0013] Install thermal insulation:

[0014] The intake cone cover heat insulation cotton 1.2 is riveted to the intake cone cover heat insulation cover 1.3;

[0015] The sensor insulation cotton 1.21 is wrapped around the air intake, and the differential pressure sensor insulation cotton 1.9 is placed between the differential pressure sensor 1.8 and the bracket of the outer heat insulation cover 1.4 by bolts.

[0016] The heat insulation cotton 1.16 of the vent cone cover is riveted to the heat insulation cover 1.15 of the vent cone cover;

[0017] The heat insulation cotton 2.7 of the outlet end cap is placed in the outlet chamber of the selective catalytic reduction (SCR) assembly 2.6;

[0018] The SCR heat shield 2.8 is welded to the outside of the cylinder of the selective catalytic reduction SCR assembly 2.6 to form a heat insulation cavity, which is filled with SCR heat insulation cotton 2.9.

[0019] The mixer heat insulation cover 2.10 is welded to the outside of the mixer 2.4 cylinder to form a heat insulation cavity, which is filled with mixer heat insulation cotton 2.11;

[0020] The DPF heat shield 2.12 is welded to the outside of the DPF 2.3 cylinder of the particulate collection assembly to form a heat insulation cavity, which is filled with DPF heat insulation cotton 2.13;

[0021] The DOC heat shield 2.14 is welded to the outside of the DOC 2.1 cylinder of the oxidation catalyst assembly to form a heat insulation cavity, which is filled with DOC heat insulation cotton 2.15;

[0022] The intake end cover heat insulation cotton 2.16 is placed in the intake chamber of the oxidation catalyst assembly DOC 2.1.

[0023] Furthermore, the integrated wiring harness 1.19 connects the temperature sensor 1.5, the differential pressure sensor 1.8, the urea nozzle 1.10, and the nitrogen and oxygen sensor 1.13, and is fixed to the outer heat insulation cover 1.4 by the wiring harness mounting bracket 1.18 and the wiring harness fixing clamp 1.19.

[0024] Furthermore, several vehicle mounting brackets 1.17 are fastened to the catalytic converter body 1.1. Beneficial effects

[0025] 1. A linear shaft-in, shaft-out cylindrical structure, mainly comprising the oxidation catalyst assembly (DOC), particulate filter assembly (DPF), mixer, and selective catalytic reduction (SCR) assembly. Each component is connected sequentially via V-shaped clamps, facilitating subsequent disassembly, maintenance, and repair. The structure is compact and integrates a vehicle mounting bracket, making vehicle installation convenient and efficient.

[0026] 2. A multi-layer heat insulation structure is adopted. The oxidation catalytic converter (DOC) contains a DOC body heat insulation cover and heat insulation cotton. The particulate filter (DPF) contains a DPF body heat insulation cover and heat insulation cotton. The mixer and selective catalytic reduction (SCR) contain a mixer, an SCR heat insulation cover, and heat insulation cotton. The outer heat insulation cover of the aftertreatment is fixed to the aftertreatment body with bolts. The surface of the inlet and outlet cone covers has molded heat insulation cotton. The surface temperature of the catalytic muffler is low, reducing the risk of surrounding parts melting.

[0027] 3. The temperature sensor, nitrogen oxide sensor, and differential pressure sensor are located on the outer heat shield of the aftertreatment system and the measuring points are connected to the aftertreatment body; the nozzle is fixed to the nozzle base of the mixer and the selective catalytic reduction (SCR) assembly by bolts; the temperature sensor, nitrogen oxide sensor, and differential pressure sensor are respectively connected to the integrated wiring harness, which is located on the outer heat shield of the aftertreatment system.

[0028] Fixing the temperature sensor, differential pressure sensor, nitrogen and oxygen sensor, and integrated wiring harness to the protective cover can reduce the risk of sensor failure due to high temperature. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the internal structure of a catalytic converter muffler.

[0031] In the diagram: 1.1-Catalytic converter body, 1.2-Intake cone cover heat insulation cotton, 1.3-Intake cone cover heat insulation cover, 1.4-Outer heat insulation cover, 1.5-Temperature sensor, 1.6-Gas intake steel pipe, 1.7-Gas intake hose, 1.8-Differential pressure sensor, 1.9-Differential pressure sensor heat insulation cotton, 1.10-Urea nozzle, 1.9-Urea nozzle heat insulation cover, 1.12-NOxic oxygen sensor bracket, 1.13-NOxic oxygen sensor, 1.14-NOxic oxygen sensor protective cover, 1.15-Exhaust cone cover heat insulation cover, 1.16-Exhaust cone cover heat insulation cotton, 1.17-Vehicle mounting bracket, 1.18-Wire harness mounting bracket, 1.19-Wire harness fixing clamp, 1.20-Integrated wire harness, 1.21-Sensor heat insulation cotton.

[0032] 2.1-Oxidation Catalytic Reduction (DOC) Assembly, 2.2-V-type Clamp Assembly, 2.3-Particulate Filter (DPF) Assembly, 2.4-Mixer, 2.5-Transition Cylinder, 2.6-Selective Catalytic Reduction (SCR) Assembly, 2.7-Outlet End Cap Insulation Cotton, 2.8-SCR Insulation Cover, 2.9-SCR Insulation Cotton, 2.10-Mixer Insulation Cover, 2.11-Mixer Insulation Cotton, 2.12-DPF Insulation Cover, 2.13-DPF Insulation Cotton, 2.14-DOC Insulation Cover, 2.15-DOC Insulation Cotton, 2.16-Inlet End Cap Insulation Cotton. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort. To facilitate understanding of this utility model, a more detailed description of this utility model will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0035] like Figure 1 As shown:

[0036] This utility model provides a single-line, flat-mounted catalytic converter muffler structure for a non-road diesel engine, wherein the intake cone cover heat shield 1.3 is welded to the catalytic converter body 1.1 (the catalytic converter body 1.1 is located at...). Figure 1 The inner part of the outer heat shield 1.4 (indicated by the arrow in 1.1) is riveted to the heat shield 1.3 of the intake cone cover.

[0037] The outer heat shield 1.4 is fixed to the intake cone cover heat shield 1.3 and the catalytic converter body 1.1 by bolts.

[0038] Temperature sensor 1.5 is fastened to the temperature sensor base on the catalytic muffler body 1.1; differential pressure sensor 1.8 is fixed to the bracket of the outer heat insulation cover 1.4 by bolts, and is fastened to the differential pressure sensor base on the catalytic muffler body 1.1 by gas intake steel pipe 1.6 and gas intake rubber hose 1.7.

[0039] The sensor insulation cotton 1.21 is wrapped around the air intake, and the differential pressure sensor insulation cotton 1.9 is placed between the differential pressure sensor 1.8 and the bracket of the outer heat insulation cover 1.4 by bolts.

[0040] The urea nozzle 1.10 is fixed to the nozzle base on the catalytic muffler body 1.1 by bolts, and the urea nozzle heat shield 1.11 is fixed to the outer heat shield 1.4 by bolts.

[0041] The nitrogen and oxygen sensor bracket 1.12 is welded to the outer heat shield 1.4, and the nitrogen and oxygen sensor 1.13 and the nitrogen and oxygen sensor protective cover 1.14 are fixed to the nitrogen and oxygen sensor bracket 1.12 with bolts.

[0042] One end of the exhaust cone cover heat shield 1.15 is fixed to the outer heat shield 1.4 by bolts, and the other end is welded to the catalytic muffler body 1.1; the exhaust cone cover heat insulation cotton 1.16 is riveted to the exhaust cone cover heat shield 1.15.

[0043] The vehicle mounting bracket 1.17 is fastened to the catalytic converter body 1.1.

[0044] The integrated wiring harness 1.19 connects the temperature sensor 1.5, differential pressure sensor 1.8, urea nozzle 1.10, and nitrogen-oxygen sensor 1.13, and is fixed to the outer heat insulation cover 1.4 via the wiring harness mounting bracket 1.18 and wiring harness fixing clamp 1.19.

[0045] like Figure 2 As shown:

[0046] The outlet hump of the oxidation catalyst assembly DOC 2.1 is connected to the inlet horn of the particulate filter assembly DPF 2.3 via a V-shaped clamp assembly 2.2; the outlet hump of the particulate filter assembly DPF 2.3 is connected to the inlet horn of the mixer 2.4 via a V-shaped clamp assembly; the outlet cylinder of the mixer 2.4 is welded together with the inlet cylinder of the selective catalytic reduction (SCR) assembly 2.6 via a transition cylinder 2.5.

[0047] The heat insulation cotton 2.7 of the outlet end cap is placed in the outlet chamber of the selective catalytic reduction (SCR) assembly 2.6.

[0048] The SCR heat shield 2.8 is welded to the outside of the cylinder of the selective catalytic reduction SCR assembly 2.6 to form a heat insulation cavity, which is filled with SCR heat insulation cotton 2.9.

[0049] The mixer heat shield 2.10 is welded to the outside of the mixer 2.4 cylinder to form a heat insulation cavity, which is filled with mixer heat insulation cotton 2.11.

[0050] The DPF heat shield 2.12 is welded to the outside of the DPF 2.3 cylinder of the particulate trap assembly to form a heat insulation cavity, which is filled with DPF heat insulation cotton 2.13.

[0051] The DOC heat shield 2.14 is welded to the outside of the DOC 2.1 cylinder of the oxidation catalyst assembly to form a heat insulation cavity, which is filled with DOC heat insulation cotton 2.15.

[0052] The intake end cover heat insulation cotton 2.16 is placed in the intake chamber of the oxidation catalyst assembly DOC 2.1.

[0053] In actual use:

[0054] The exhaust gas from the engine enters the catalytic muffler, then flows sequentially through the oxidation catalytic converter (DOC) 2.1 and the particulate filter (DPF) 2.3 before entering the mixer 2.4. In the mixer, the exhaust gas is thoroughly mixed with the urea solution injected by the urea nozzle 1.10, and then flows through the selective catalytic reduction (SCR) assembly 2.6. After purification, the exhaust gas is released into the atmosphere. Temperature sensor 1.5 detects the temperature of the gas inside the catalytic muffler, differential pressure sensor 1.8 detects the pressure difference across the DPF catalytic unit, and nitrogen oxide sensor 1.13 detects the nitrogen oxide pollutant levels in the exhaust gas released into the atmosphere. The vehicle mounting bracket 1.17 is fixed to the vehicle with bolts. The integrated wiring harness 1.19 connects to the vehicle wiring harness.

[0055] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A horizontally mounted, single-line non-road diesel engine catalytic converter muffler structure, characterized in that: The catalytic muffler body structure is as follows: the outlet hump of the oxidation catalytic converter (DOC) is connected to the inlet horn of the particulate filter (DPF) via a V-shaped clamp assembly; the outlet hump of the particulate filter (DPF) is connected to the inlet horn of the mixer via a V-shaped clamp assembly; the outlet cylinder of the mixer is welded together with the inlet cylinder of the selective catalytic reduction (SCR) assembly via a transition cylinder. The intake cone cover heat shield is welded to the catalytic converter body; The external heat shield is fixed to the heat shield of the intake cone cover and the catalytic converter body by bolts; The temperature sensor is fastened to the temperature sensor base on the catalytic muffler body; the differential pressure sensor is fixed to the bracket of the outer heat insulation cover by bolts, and is fastened to the differential pressure sensor base on the catalytic muffler body through the gas intake steel pipe and gas intake rubber hose. The urea nozzle is fixed to the nozzle base on the catalytic muffler body by bolts, and the urea nozzle heat insulation cover is fixed to the outer heat insulation cover by bolts. The nitrogen and oxygen sensor bracket is welded to the outer heat shield, and the nitrogen and oxygen sensor and the nitrogen and oxygen sensor protective cover are fixed to the nitrogen and oxygen sensor bracket with bolts; One end of the exhaust cone cover heat shield is fixed to the outer heat shield with bolts, and the other end is welded to the catalytic muffler body.

2. The linear horizontally mounted non-road diesel engine catalytic muffler structure as described in claim 1, characterized in that: The heat insulation cotton of the intake cone cover is riveted to the heat insulation cover of the intake cone cover; The sensor insulation cotton is wrapped around the air intake, and the differential pressure sensor insulation cotton is placed between the differential pressure sensor and the bracket of the outer heat insulation cover by bolts. The heat insulation cotton of the vent cone cover is riveted to the heat insulation cover of the vent cone cover; The heat insulation cotton of the outlet end cap is placed in the outlet chamber of the selective catalytic reduction (SCR) assembly; The SCR heat shield is welded to the outside of the selective catalytic reduction (SCR) assembly cylinder to form a heat insulation cavity, which is filled with SCR heat insulation cotton. The mixer heat insulation cover is welded to the outside of the mixer cylinder to form a heat insulation cavity, which is filled with mixer heat insulation cotton. The DPF heat shield is welded to the outside of the DPF cylinder of the particulate collection assembly to form a heat insulation cavity, which is filled with DPF heat insulation cotton. The DOC heat shield is welded to the outside of the DOC cylinder of the oxidation catalyst assembly to form a heat insulation cavity, which is filled with DOC heat insulation cotton. The heat insulation cotton of the intake end cap is placed in the intake chamber of the oxidation catalyst assembly (DOC).

3. The linear horizontally mounted non-road diesel engine catalytic converter structure as described in claim 1, characterized in that: The integrated wiring harness connects the temperature sensor, differential pressure sensor, urea nozzle, and nitrogen-oxygen sensor, and is fixed to the outer heat insulation cover by the wiring harness mounting bracket and wiring harness fixing clamp.

4. The linear horizontally mounted non-road diesel engine catalytic muffler structure as described in claim 1, characterized in that: Several vehicle mounting brackets are fastened to the catalytic converter body.

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