CN203614170U - Structure assembly of SCR (semiconductor control rectifier) muffler for motor vehicle - Google Patents

Abstract

The utility model relates to a structural assembly of an SCR muffler for a motor vehicle, comprising a shell, an inner assembly, an end cover I and an end cover II welded to the shell, and the inner assembly includes a partition plate I and a partition welded to the inner wall of the shell Plate II, SCR converter, air inlet pipe and air outlet pipe. The partition I, partition II, end cover I and end cover II divide the housing into the first, second and third air chambers. There are multiple ventilation holes, the SCR converter runs through the second air chamber, and is welded to the partition I and partition II respectively, the intake pipe runs through the partition I, and one end is welded to the partition II, and the other end is connected to the intake pipe , the air inlet pipe between the partition I and the partition II is provided with a plurality of air holes, the outlet pipe runs through the partition I and the partition II, and one end is connected with the third air chamber, and the other end is connected with the air outlet pipe. The structural assembly of the SCR muffler for vehicles meets the exhaust emission requirements stipulated in the National IV emission regulations for diesel engines.

Description

A structural assembly of an SCR muffler for a motor vehicle

technical field

The utility model relates to the technical field of motor vehicle accessories, in particular to a structural assembly of an SCR muffler for a motor vehicle.

Background technique

At present, with the rapid development of motor vehicles, serious air pollution has occurred, and regional complex characteristics have emerged. The air pollution in many large cities has changed from soot-type pollution to soot and motor vehicle exhaust pollution. The city has clearly shown the air pollution of motor vehicle exhaust type. In order to improve the utilization rate of fuel, reduce the content of pollutants in motor vehicle exhaust, and reduce the damage to the environment caused by vehicle exhaust, the country is about to implement the National IV emission regulations, and the research on the pollution control technology of motor vehicle exhaust emissions is extremely important. To meet emission standards, exhaust post-treatment technology must be used. At present, domestically designed catalytic mufflers are in short supply, and the cost of catalytic mufflers used is high and installation is inconvenient. Here it is the weak point that existing technology exists.

Utility model content

The technical problem to be solved by the utility model is to provide a structural assembly of an SCR muffler for motor vehicles to meet the exhaust emission requirements stipulated in the national IV emission regulations of diesel engines.

This solution is achieved through the following technical measures: a structural assembly of an SCR muffler for motor vehicles, which includes a housing, an inner assembly, an end cover I and an end cover II matched with the housing, and the end cover I and The end cover II is welded to both ends of the housing respectively. The end cover I is provided with an inlet pipe port and an air outlet pipe port. The inner assembly is located inside the housing. Converter, inlet pipe and outlet pipe, the partition I and partition II are parallel to the end cover I and welded to the inner wall of the shell respectively, the partition I, partition II, end cover I and end cover II will The casing is divided into a first air chamber, a second air chamber and a third air chamber. The partition I is provided with a plurality of vent holes, and the SCR converter runs through the second air chamber and is connected to the partition I and the third chamber respectively. The partition II is welded, the air intake pipe runs through the partition I, and one end is welded to the partition II, and the other end is connected to the intake pipe at the inlet of the end cover I, and the air intake pipe between the partition I and the partition II The air inlet pipe is provided with a plurality of ventilation holes, and the air outlet pipe runs through the partition I and the partition II, and one end communicates with the third air chamber, and the other end is connected with the outlet pipe at the outlet port of the end cover I. The above-mentioned SCR converter includes two carriers, a gasket and an SCR converter cylinder, the gasket is located between the carrier and the SCR converter cylinder, a gap is left between the two carriers, and the SCR converter cylinder Necks are provided at both ends of the body. The carrier is a ceramic carrier, and the liner is a vermiculite liner. The ceramic carrier wrapped with the vermiculite liner is pressed into the converter shell, and the vermiculite liner fixes the ceramic support by friction, and then the SCR converter cylinder The body is shrunk to effectively prevent the movement of the ceramic carrier.

The inlet and outlet pipes of the end cover I are provided with flanges, which can improve the strength of the nozzles and effectively prevent cracks at the nozzles caused by long-term vibration.

The above shell is made of 06Cr19Ni10 (SUS304) stainless steel plate, which can well solve the problem of urea corrosion on the shell, and the shell does not need surface treatment.

The above-mentioned SCR converter cylinder is made of 06Cr19Ni10 (SUS304) stainless steel plate, which can well solve the problem of urea corrosion on the SCR converter cylinder, and the SCR converter cylinder does not need surface treatment.

The above-mentioned end cover I and end cover II have a rectangular cross-section, and the four corners are arc transitions. Four brackets are symmetrically arranged on the end cover II, and the four brackets are used for the installation of the heat insulation board.

A reinforcing rib I is provided on the end cover I, and a reinforcing rib II is provided on the end cover II.

The above-mentioned carrier is a ceramic carrier, and the liner is a vermiculite liner.

The casing is 631-637mm long, 387-393mm wide, and 637-643mm high. the

The beneficial effects of the utility model can be known from the above-mentioned technical scheme: a structural assembly of an SCR muffler for motor vehicles, which has a compact structure and can meet the requirements of the National IV emission regulations for diesel engines; the carrier in the SCR converter and the SCR conversion The barrel of the converter is installed through the gasket to ensure its accuracy requirements. Both ends of the inlet and outlet of the SCR converter barrel are narrowed to avoid the movement of the carrier. The air inlet and the outlet of the end cover I are provided with flanges. The end cover I is partially strengthened, and effectively prevents weld cracking caused by vibration; the shell and the SCR converter cylinder are made of 06Cr19Ni10 (SUS304) stainless steel plate, which can well solve the problem of urea on the shell and SCR conversion The corrosion problem of the converter cylinder, and the shell and the SCR converter cylinder do not require surface treatment.

It can be seen that, compared with the prior art, the utility model has substantive features and progress, and the beneficial effects of its implementation are also obvious.

Description of drawings

Fig. 1 is the main view perspective structure schematic diagram of the present utility model;

Fig. 2 is the top view perspective structure schematic diagram of the utility model;

Fig. 3 is the left view structure diagram of the utility model;

Fig. 4 is the right view structural representation of the utility model;

Fig. 5 is the structural representation of SCR converter in the utility model;

In the figure, 1-housing, 2-end cap I, 3-end cap II, 4-partition I, 5-SCR converter, 5.1-carrier, 5.2-liner, 5.3-SCR converter cylinder, 6 -Separator II, 7-intake pipe, 7.1-breather hole, 8-outlet pipe, 9-first air chamber, 10-second air chamber, 11-third air chamber, 12-intake connection, 13-outlet air Take over, 14-bracket, 15-reinforcing rib I, 16-reinforcing rib II, 17-muffler nameplate.

Detailed ways

In order to clearly illustrate the technical characteristics of this solution, the following will describe this solution through specific implementation modes and in conjunction with the accompanying drawings.

As shown in Figure 1-4, a structural assembly of an SCR muffler for a motor vehicle includes a housing 1, an inner assembly, an end cover I2 and an end cover II3 matching the housing 1, and the end cover I2 and the end cover The cover II3 is welded to both ends of the housing 1 respectively, the end cover I2 is provided with an inlet pipe port and an air outlet pipe port, the inner assembly is located inside the housing 1, and the inner assembly includes a partition I4, an SCR converter 5 , separator II6, air intake pipe 7 and air outlet pipe 8, the separator I4 and separator II6 are parallel to the end cover I2 and welded to the inner wall of the housing 1 respectively, the separator I4, the separator II6, the end cover I2 The shell 1 is divided into the first air chamber 9, the second air chamber 10 and the third air chamber 11 with the end cover II3. The partition I4 is provided with a plurality of ventilation holes, and the SCR converter 5 runs through the second air chamber. The air chamber 10 is welded with the partition I4 and the partition II6 respectively, the air inlet pipe 7 runs through the partition I4, and one end is welded with the partition II4, and the other end is connected with the intake pipe 12 at the inlet port of the end cover I2 Connected, the air inlet pipe 7 between the partition I4 and the partition II6 is provided with a plurality of ventilation holes 7.1, the outlet pipe 7 runs through the partition I4 and the partition II6, and one end communicates with the third air chamber 11, and the other One end is connected to the gas outlet connecting pipe 13 at the outlet of the end cover I2. The gas outlet connecting pipe 13 is an elbow. The length of the housing is 631-637 mm, the width is 387-393 mm, and the height is 637-643 mm. In this embodiment, the housing has a length of 634 mm, a width of 390 mm, and a height of 640 mm.

The inlet and outlet pipes of the end cover I2 are provided with flanging, and in this embodiment, the height of the flanging is 15 mm. The flanging can improve the strength of the nozzle and effectively prevent the nozzle from cracking due to long-term vibration.

The above casing 1 is made of 06Cr19Ni10 (SUS304) stainless steel plate, which can well solve the problem of corrosion of the casing 1 by urea, and the casing 1 does not need surface treatment.

The above-mentioned end cover I2 and end cover II3 have a rectangular cross-section, and the four corners are arc-shaped transitions. The end cover II3 is symmetrically provided with four brackets 14, and the four brackets 14 are used for the installation of the heat insulation board.

A reinforcing rib I15 is provided on the end cover I2, and a reinforcing rib II16 is provided on the end cover II3.

The upper surface of the housing 1 is provided with a muffler nameplate 17, and the product number, certification number, serial number and two-dimensional code of the muffler are engraved on the muffler nameplate 17 to ensure the traceability of the product.

As shown in Figures 5-6, the above-mentioned SCR converter 5 includes two carriers 5.1, a liner 5.2 and an SCR converter cylinder 5.3, the liner 5.2 is located between the carrier 5.1 and the SCR converter cylinder 5.3, the There is a gap between the two carriers 5.1, and the two ends of the SCR converter cylinder 5.3 are provided with constrictions. The carrier 5.1 is a ceramic carrier, and the liner 5.2 is a vermiculite liner. The ceramic carrier wrapped with the vermiculite liner is pressed into the converter cylinder 5.3, and the vermiculite liner fixes the ceramic support 5.1 by friction, and then the The cylinder body 5.3 of the SCR converter is necked to effectively prevent the movement of the ceramic carrier 5.1. The above-mentioned SCR converter cylinder 5.3 is made of 06Cr19Ni10 (SUS304) stainless steel plate, which can well solve the problem of urea corrosion on the SCR converter cylinder 5.3, and the SCR converter cylinder 5.3 does not need surface treatment.

When processing the SCR muffler for a motor vehicle, the partition I4, the SCR converter 5, the partition II6, the intake pipe 7, and the outlet pipe 8 in the inner assembly are welded together as an inner assembly. The dimensional accuracy is ensured by the mold, the inner component assembly is press-fitted into the shell 1, welded with the shell 1, then assembled and welded with end cap I2 and end cap II3, and finally assembled and welded with the inlet pipe 12 and the outlet pipe 13. Bracket 14 and muffler nameplate 17.

The working process of the SCR muffler for motor vehicles: the automobile exhaust enters the intake pipe 7 from the intake joint 12, then enters the second air chamber 10 from the air hole 7.1 in the intake pipe 7 of the second air chamber 10, and then enters the second air chamber 10 from the dividing plate The air hole on I4 enters the first air chamber 9, and then the exhaust gas enters the third air chamber 11 through the SCR converter 5, and the treated exhaust gas is discharged from the outlet pipe 8.

The technical features not described in the utility model can be realized by or adopting the prior art, and will not be repeated here. Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above-mentioned embodiment. Changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present utility model shall also belong to the protection scope of the present utility model.

Claims (9)

1. a structural assembly for automobile-use SCR silencing apparatus, is characterized in that: it comprises housing, inner assembly, the end cap I of mating with housing and end cap II, described end cap I and end cap II are welded with housing two ends respectively, are provided with the air inlet mouth of pipe and the mouth of pipe of giving vent to anger in described end cap I, and described inner assembly is positioned at enclosure interior, and described inner assembly comprises dividing plate I, dividing plate II, SCR converter, suction tude and steam outlet pipe, described dividing plate I is parallel with end cap I with dividing plate II, and respectively with inner walls welding, described dividing plate I, dividing plate II, housing is divided into the first air chamber by end cap I and end cap II, the second air chamber and the 3rd air chamber, be provided with multiple vents in described dividing plate I, and described SCR converter runs through the second air chamber, and weld with dividing plate I and dividing plate II respectively, described suction tude runs through dividing plate I, and one end and the welding of dividing plate II, the other end is connected with air inlet tube at the air inlet mouth of pipe place of end cap I, in the suction tude between dividing plate I and dividing plate II, is evenly provided with multiple air holes, and described steam outlet pipe runs through dividing plate I and dividing plate II, and one end is communicated with the 3rd air chamber, the other end is connected with outgoing gas connection tube at the mouth of pipe place of giving vent to anger of end cap I.

2. the structural assembly of automobile-use SCR silencing apparatus according to claim 1, it is characterized in that: described SCR converter comprises two carriers, liner and SCR converter cylindrical shell, described liner is between carrier and SCR converter cylindrical shell, between described two carriers, leave gap, described SCR converter cylindrical shell two ends are provided with reducing.

3. the structural assembly of automobile-use SCR silencing apparatus according to claim 1, is characterized in that: the air inlet mouth of pipe of described end cap I and the mouth of pipe of giving vent to anger are provided with flange.

4. the structural assembly of automobile-use SCR silencing apparatus according to claim 1, is characterized in that: described housing is by 06Cr19Ni10(SUS304) housing made of corrosion resistant plate.

5. the structural assembly of automobile-use SCR silencing apparatus according to claim 2, is characterized in that: described SCR converter cylindrical shell is by 06Cr19Ni10(SUS304) the SCR converter cylindrical shell made of corrosion resistant plate.

6. the structural assembly of automobile-use SCR silencing apparatus according to claim 1, is characterized in that: described end cap I and end cap II cross section are that rectangle structure and four jiaos are arc transition, are symmetrically arranged with four supports in described end cap II.

7. the structural assembly of automobile-use SCR silencing apparatus according to claim 1, is characterized in that: in described end cap I, be provided with stiffening rib I, in described end cap II, be provided with stiffening rib II.

8. the structural assembly of automobile-use SCR silencing apparatus according to claim 2, is characterized in that: described carrier is ceramic monolith, and described liner is vermiculite liner.

9. the structural assembly of automobile-use SCR silencing apparatus according to claim 1, is characterized in that: described housing length is 631～637mm, and wide is 387～393mm, and height is 637～643mm.

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