CN214366333U

CN214366333U - Light-duty six diesel oil exhaust system insulation construction in state

Info

Publication number: CN214366333U
Application number: CN202023081187.2U
Authority: CN
Inventors: 刘宇
Original assignee: Jiangxi Isuzu Motors Co Ltd
Current assignee: Jiangxi Isuzu Motors Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-10-08
Anticipated expiration: 2030-12-17

Abstract

The utility model relates to a diesel engine technical field, it discloses a light-duty six diesel exhaust system insulation construction in state, including diesel oxidation type catalytic converter, diesel particulate trap and SCR converter, diesel oxidation type catalytic converter's exit end and diesel particulate trap's entry end link together through intermediate junction pipe, diesel particulate trap's exit end and SCR converter's entry end link together through intermediate junction pipe, the insulation assembly includes first sheet metal and second sheet metal, first sheet metal inside wall is attached with first heat preservation cotton, second sheet metal inside wall is attached with second heat preservation cotton, first sheet metal and second sheet metal all are semi-circular, first sheet metal and second sheet metal reciprocal anchorage. According to the technical scheme, the heat-insulation cotton composed of the glass fiber resistant to the high temperature of more than 800 ℃ is used, the stainless steel sheet is used for fixing the heat-insulation cotton, the strength is high, the heat-insulation cotton can be welded and fixed, the reliability is high, meanwhile, the heat-insulation cotton can resist the high temperature and can also resist the water, and the inner layer heat-insulation cotton is effectively protected.

Description

Light-duty six diesel oil exhaust system insulation construction in state

Technical Field

The utility model relates to a diesel engine technical field, more specifically say, it relates to a six diesel oil exhaust system insulation construction in light-duty state.

Background

In order to meet the emission requirement of the sixth stage of the national emission regulation, compared with the sixth stage of the national emission regulation, the sixth diesel aftertreatment is additionally provided with an SCR tail gas treatment device, the heat insulation requirement of the tail gas treatment device is higher, and because the exhaust pipe is made of stainless steel materials and has strong heat conduction (heat dissipation) capability, the exhaust temperature required by the SCR catalyst is easy to dissipate a large amount of temperature at the front pipe, the conversion efficiency of SCR is low, and the tail gas exceeds the standard.

The SCR device is applied to a medium-heavy truck before the national six-emission regulation, because the type of truck has large displacement, the temperature of the exhaust of a supercharger outlet is higher, a heat preservation device is not required to be additionally arranged, the temperature required by the exhaust treatment efficiency can be met, on the light national six-diesel truck, because the displacement is generally 2L or 2.5L, the temperature of the exhaust of the supercharger outlet is lower than that of the truck, the general working condition is about 300 ℃, a large amount of heat can be dissipated when the exhaust treatment device passes through, when the exhaust reaches the inlet of a catalyst, the temperature can be reduced by more than 200 ℃, the temperature required by the SCR catalyst to meet the conversion requirement is more than 160 ℃, the condition of no heat preservation structure exists, the time required for reaching the temperature can be increased, and the nitrogen oxides in the exhaust cannot be effectively treated in the period of time, so that the exhaust exceeds the standard.

The exhaust pipe heat-insulating method has the advantages that the non-woven fabric is applied to wrap the area of the exhaust pipe needing heat insulation in the prior industry, and the exhaust pipe is clamped on the exhaust pipe through the double springs, so that heat insulation can be realized to a certain extent, but the non-woven fabric is low in temperature resistance level, easy to be heated and ineffective, and meanwhile, the assembling process is rough, poor in batch consistency and unstable in quality.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems that the non-woven fabrics proposed in the background technology have low temperature resistance level, are easy to be heated and lose efficacy, and simultaneously have rough assembly process, poor batch consistency and unstable quality, the utility model uses the heat-insulating cotton consisting of the glass fiber with high temperature resistance of more than 800 ℃, and can completely meet the high temperature condition on the exhaust pipe; the stainless steel sheet is used for fixing the heat insulation cotton, so that the strength is high, the steel sheet can be welded and fixed, the reliability is high, meanwhile, the steel sheet can resist high temperature and can also resist water, and the lining heat insulation cotton is effectively protected.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a light-duty six diesel oil exhaust system insulation construction in state, includes diesel oxidation type catalytic converter, diesel particulate trap and SCR converter, diesel oxidation type catalytic converter's exit end with the entry end of diesel particulate trap links together through intermediate junction pipe, the exit end of diesel particulate trap with the entry end of SCR converter links together through intermediate junction pipe, the periphery of SCR converter is equipped with the heat preservation subassembly, the heat preservation subassembly includes first sheet metal and second sheet metal, first sheet metal inside wall is attached with first heat preservation cotton, second sheet metal inside wall is attached with second heat preservation cotton, first sheet metal and second sheet metal all are semi-circular, first sheet metal and second sheet metal reciprocal anchorage.

Through above-mentioned technical scheme, use the heat preservation cotton that a glass fiber that is high temperature resistant more than 800 ℃ constitutes, can satisfy the high temperature condition on the blast pipe completely, use the fixed heat preservation cotton of stainless steel thin slice, intensity is high, can weld fixedly, and the good reliability both can be high temperature resistant simultaneously and also can carry out waterproof, effectively protect the nexine heat preservation cotton.

The utility model discloses further set up to: the first sheet metal inside wall bonds first heat preservation is cotton, the second sheet metal inside wall bonds the second heat preservation is cotton.

The utility model discloses further set up to: the first thin plate and the second thin plate are both stainless steel thin plates.

The utility model discloses further set up to: the first thin plate and the second thin plate are both made of SUS304 stainless steel and have a thickness of 0.15 mm.

The utility model discloses further set up to: and the first heat-insulating cotton and the second heat-insulating cotton are both made of fiber glass cotton with the thickness of 8 mm.

The utility model discloses further set up to: the first thin plate and the second thin plate are turned over and buckled firstly and then fixed together through spot welding.

To sum up, the utility model discloses following beneficial effect has:

(1) the heat-insulating cotton consisting of the glass fiber with high temperature resistance of over 800 ℃ can completely meet the high-temperature condition on the exhaust pipe;

(2) the stainless steel sheet is used for fixing the heat insulation cotton, so that the strength is high, the steel sheet can be welded and fixed, the reliability is high, meanwhile, the steel sheet can resist high temperature and can also resist water, and the lining heat insulation cotton is effectively protected.

Drawings

FIG. 1 is a schematic view of an explosion structure of a heat-insulating structure;

fig. 2 is a schematic view of the overall structure of the insulation structure.

Reference numerals: 1. a diesel oxidation catalytic converter; 2. a diesel particulate trap; 3. an SCR converter; 4. a heat preservation assembly; 41. a first thin plate; 42. a second thin plate; 43. first heat insulation cotton; 44. and second heat preservation cotton.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.

The utility model provides a light-duty six diesel oil exhaust system insulation construction in state, combine fig. 1 and fig. 2 to show, including diesel oxidation type catalytic converter 1, diesel particulate trap 2 and SCR converter 3, the exit end of diesel oxidation type catalytic converter 1 and the entry end of diesel particulate trap 2 link together through intermediate junction pipe, the exit end of diesel particulate trap 2 and the entry end of SCR converter 3 link together through intermediate junction pipe, the periphery of SCR converter 3 is equipped with heat preservation subassembly 4, heat preservation subassembly 4 includes first sheet metal 41 and second sheet metal 42, first sheet metal 41 inside wall is attached with first heat preservation cotton 43, second sheet metal 42 inside wall is attached with second heat preservation cotton 44, first sheet metal 41 and second sheet metal 42 are all semicircular, first sheet metal 41 and second sheet metal 42 reciprocal anchorage.

The first insulating cotton 43 is adhered to the inner side wall of the first thin plate 41, and the second insulating cotton 44 is adhered to the inner side wall of the second thin plate 42.

The first thin plate 41 and the second thin plate 42 are both stainless steel thin plates. The material of the first thin plate 41 and the second thin plate 42 is SUS304 stainless steel, and the thickness is 0.15 mm. The first heat-preservation cotton 43 and the second heat-preservation cotton 44 are both made of 8mm thick fiber glass cotton. The first sheet 41 and the second sheet 42 are first turned over and buckled and then fixed together by spot welding.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a light-duty six diesel oil exhaust system insulation construction in state, includes diesel oxidation type catalytic converter (1), diesel particulate filter (2) and SCR converter (3), the exit end of diesel oxidation type catalytic converter (1) with the entry end of diesel particulate filter (2) links together through intermediate junction pipe, the exit end of diesel particulate filter (2) with the entry end of SCR converter (3) links together through intermediate junction pipe, its characterized in that: the periphery of SCR converter (3) is equipped with heat preservation subassembly (4), heat preservation subassembly (4) include first sheet metal (41) and second sheet metal (42), first sheet metal (41) inside wall is attached to have first heat preservation cotton (43), second sheet metal (42) inside wall is attached to have second heat preservation cotton (44), first sheet metal (41) and second sheet metal (42) all are semi-circular, first sheet metal (41) and second sheet metal (42) reciprocal anchorage.

2. The heat insulation structure of the light-duty national six-diesel exhaust system according to claim 1, characterized in that: the first heat-preservation cotton (43) is bonded on the inner side wall of the first thin plate (41), and the second heat-preservation cotton (44) is bonded on the inner side wall of the second thin plate (42).

3. The heat insulation structure of the light-duty national six-diesel exhaust system according to claim 1, characterized in that: the first thin plate (41) and the second thin plate (42) are both stainless steel thin plates.

4. The heat insulation structure of the light-duty national six-diesel exhaust system according to claim 3, characterized in that: the first thin plate (41) and the second thin plate (42) are both made of SUS304 stainless steel and have a thickness of 0.15 mm.

5. The heat insulation structure of the light-duty national six-diesel exhaust system according to claim 1, characterized in that: the first heat-preservation cotton (43) and the second heat-preservation cotton (44) are both made of fiber glass cotton with the thickness of 8 mm.

6. The heat insulation structure of the light-duty national six-diesel exhaust system according to claim 1, characterized in that: the first thin plate (41) and the second thin plate (42) are firstly turned over and buckled and then fixed together through spot welding.