Post-processor and vehicle

Abstract

The utility model relates to a postprocessor and a vehicle, and belongs to the field of vehicle accessories. According to the technical scheme, the postprocessor comprises a box body, an air inlet and an air outlet are formed in the box body, the interior of the box body is divided into a plurality of cavities through a plurality of partition plates, the multiple cavities comprise an air inlet cavity and a buffer cavity, the air inlet is communicated to the air inlet cavity, and the buffer cavity is communicated to the air outlet through an SCR unit; a silencing barrel is installed on the partition plate between the air inlet cavity and the buffering cavity and penetrates through the partition plate, and a plurality of through holes are formed in the barrel wall of the silencing barrel. The postprocessor box has the advantages that the postprocessor box is divided into the air inlet cavity and the buffering cavity, the silencing barrel is arranged between the air inlet cavity and the buffering cavity, engine tail gas enters the SCR unit through the silencing barrel, in the process, gas passes through the small holes in the silencing barrel, the flow speed is reduced, airflow noise is reduced, and the silencing effect of the postprocessor is improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicle accessories, in particular to a post-processor and a vehicle. Background Art

[0002] The after-treatment of automobiles is an important part of the automobile exhaust treatment system. Its main purpose is to reduce harmful substances in automobile exhaust, thereby protecting the environment and human health. After-treatment usually uses selective catalytic reduction (SCR) technology. The principle of SCR technology is to use a reducing agent (such as urea) under the action of a catalyst to reduce nitrogen oxides (NO x ) selectively reduces nitrogen (N2) and water (H2O). This technology can effectively reduce NO in engine exhaust. x content, thereby meeting environmental protection requirements.

[0003] Existing after-processors mainly include box-type and cylinder-type structures. Among them, the box-type after-processor is widely used in heavy-duty commercial vehicles due to its advantages such as low back pressure and easy layout. Its structure includes a box body and an SCR catalytic unit inside the box body. The box body is connected to the vehicle's exhaust system. The engine exhaust enters the box body through a pipe and is discharged after treatment.

[0004] Although the box-type post-processor has the above advantages, it also has the problem of poor silencing ability. The silencing effect on the exhaust noise of the engine is poor, resulting in high noise around the driver's ears, affecting the driver's comfort. Summary of the invention

[0005] Aiming at the problem that the current box-type post-processor has poor silencing capability, the utility model provides a post-processor with better silencing capability.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is a post-processor, including a box body, an air inlet and an air outlet are arranged on the box body, the interior of the box body is divided into multiple cavities by multiple partitions, the multiple cavities include an air inlet cavity and a buffer cavity, the air inlet is connected to the air inlet cavity, and the buffer cavity is connected to the air outlet through the SCR unit; a silencer is installed on the partition between the air inlet cavity and the buffer cavity, the silencer passes through the partition, and a plurality of through holes are opened on the wall of the silencer. This solution divides the air inlet cavity and the buffer cavity in the post-processor box body, and arranges a silencer between the two, so that the engine exhaust enters the SCR unit through the silencer. In this process, the gas passes through the small holes on the silencer, slowing down the flow rate, reducing the airflow and wind noise, and improving the silencing effect of the post-processor.

[0007] Preferably, an inner intake tube is installed inside the intake cavity, one end of which is connected to the air inlet, and a plurality of through holes are provided on the tube wall of the inner intake tube. After the exhaust gas enters the box, it diffuses through the inner intake tube and is initially silenced by the porous tube wall of the inner intake tube.

[0008] Preferably, the other end of the air intake inner tube is fixed on the inner wall of the box. The two ends of the air intake inner tube are fixed to prevent it from vibrating, and the other end of the air intake inner tube is blocked at the same time, so that the exhaust gas is completely discharged through the small holes in the tube wall, thereby improving the silencing effect.

[0009] Preferably, the multiple inner cavities also include an air outlet cavity, the air outlet is arranged on the box wall corresponding to the air outlet cavity, and the two ends of the SCR unit are respectively connected to the buffer cavity and the air outlet cavity. An air outlet cavity is arranged on the air outlet side of the SCR unit to slow down the air outlet flow rate of the SCR unit and reduce the noise there.

[0010] Preferably, the outer periphery of the portion of the muffler located in the air inlet cavity and / or the portion located in the buffer cavity is provided with a plurality of guide vanes, the guide vanes being strip-shaped plates, and the length direction of the guide vanes being arranged along the axial direction of the muffler, so as to make the gas mix evenly, ensure the uniformity of ammonia at the inlet of the SCR carrier, and reduce the risk of crystallization.

[0011] Preferably, the box body includes a side plate, which is surrounded by a through columnar structure, and the end surfaces of both ends of the column are respectively provided with a first sealing plate and a second sealing plate, and the box body is provided with a first partition plate and a third partition plate, and the first sealing plate, the first partition plate, the third partition plate, and the second sealing plate are arranged in sequence and parallel to each other, and a second partition plate is arranged between the first sealing plate and the first partition plate, and the second partition plate is perpendicular to the first partition plate and is located in the middle of the first partition plate, and a window is arranged on the upper part of the first partition plate;

[0012] The air inlet cavity is between the first and third baffles and above the second baffle, the buffer cavity is formed by the lower part of the second baffle, the first baffle and the first sealing plate, and the air outlet cavity is between the third baffle and the second sealing plate. The front and rear three-section cavity is adopted, and the front section cavity is divided up and down by the second baffle, so that the muffler is arranged vertically, which effectively reduces the volume of the post-processor.

[0013] Preferably, the outer periphery of the side plate is covered with a heat-insulating cotton layer to improve the internal heat-insulating effect of the post-processor and reduce heat radiation.

[0014] Preferably, a protective shell is provided outside the thermal insulation cotton layer to further improve the thermal insulation effect and form multiple layers of different media to reduce the outward propagation of noise.

[0015] Preferably, the first sealing plate and / or the second sealing plate is a double-layer structure, which effectively reduces the outer surface temperature of the end cover and reduces the radiation noise of the end cover surface.

[0016] On the other hand, the utility model also provides a vehicle, which adopts the above-mentioned post-processor.

[0017] It can be seen from the above technical scheme that the advantages of the utility model are that the scheme divides the post-processor box into multiple inner cavities, and sets a porous silencer structure between the exhaust gas inlet and different cavities, which effectively reduces the engine exhaust noise and improves the silencing effect of the post-processor. At the same time, it can make the exhaust gas and urea mix more evenly, and improve the catalytic treatment effect; a multi-layer box wall structure is set to improve the thermal insulation effect, reduce heat radiation, and reduce the external propagation of noise after multiple medium changes; the internal cavity division design is reasonable, which effectively reduces the volume of the post-processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model.

[0020] Description of main reference numerals

[0021] 1. Box body, 1-1. Air inlet cavity, 1-2. Buffer cavity, 1-3. Air outlet cavity, 2. Muffler, 3. Inner air inlet pipe, 4. SCR unit, 5. Guide plate, 6. First partition, 7. Second partition, 8. Third partition, 9. Insulation cotton layer, 10. Protective shell, 11. Air outlet pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] Embodiment 1

[0024] like Figure 1As shown, a post-processor comprises a box body 1, on which an air inlet and an air outlet are provided, and the interior of the box body 1 is divided into a plurality of cavities by a plurality of partitions: the box body 1 comprises a side plate, which is surrounded by a through cylindrical structure, and the end surfaces of the two ends of the column are respectively provided with a first sealing plate and a second sealing plate, and the box body 1 is provided with a first partition 6 and a third partition 8, the first sealing plate, the first partition 6, the third partition 8, and the second sealing plate are arranged in sequence and parallel to each other, a second partition 7 is provided between the first sealing plate and the first partition 6, the second partition 7 is perpendicular to the first partition 6 and is located in the middle of the first partition 6, and a window is provided on the upper part of the first partition 6, and then the first partition 6 and the third partition 8 divide the interior of the box body 1 into three parts: front, middle, and rear (with Figure 1 The left side in the figure is the front), the second partition 7 further divides the front cavity into two parts, the upper part of the front cavity is connected with the middle cavity through the window on the first partition, serving as the air inlet cavity 1-1, the lower part of the front cavity is the buffer cavity 1-2, and the rear cavity is the air outlet cavity 1-3.

[0025] An air inlet is provided in the area of ​​the side panel of the box body 1 corresponding to the air inlet cavity 1-1, and an air inlet inner tube 3 is provided inside the air inlet cavity. One end of the air inlet inner tube 3 is connected to the air inlet, and the other end is fixedly connected to the inner wall of the box body 1, and a plurality of through holes are provided on the tube wall of the air inlet inner tube 3; in the front cavity, a silencer 2 is installed on the second partition plate 7, and the silencer 2 passes through the second partition plate 7, and a plurality of through holes are provided on the tube wall of the silencer 2; a plurality of guide plates 5 are also provided on the outer periphery of the part of the silencer 2 located above the second partition plate 7, and the plurality of guide plates 5 are evenly arranged along the circumference of the silencer 2, and the guide plates 5 are strip plates, and the length direction of the guide plates 5 is arranged along the axial direction of the silencer 2.

[0026] An SCR unit 4 is installed in the box body, and both ends of the SCR unit 4 are fixedly installed at the lower part of the first partition 6 and the third partition 8. The SCR unit 4 connects the buffer chamber 1-2 and the air outlet chamber 1-3 to catalytically treat the exhaust gas. An outlet pipe 11 is provided on the second sealing plate to discharge the treated exhaust gas.

[0027] Furthermore, in order to improve the heat preservation and sound insulation effects, the first sealing plate and the second sealing plate both adopt a double-layer panel structure with a hollow interior. The outer periphery of the side panel is covered with a heat preservation cotton layer 9, and a protective shell 10 is provided outside the heat preservation cotton layer 9.

[0028] Embodiment 2

[0029] Based on the post-processor provided in the first embodiment, this embodiment further provides a vehicle, and this vehicle adopts the post-processor described in the first embodiment.

[0030] It can be seen from the above implementation modes that the advantage of the utility model lies in that the present scheme divides the post-processor box into multiple inner cavities, and arranges a porous silencer structure between the exhaust gas inlet and different cavities, which effectively reduces the engine exhaust noise and improves the silencing effect of the post-processor, while enabling the exhaust gas and urea to be mixed more evenly, thereby improving the catalytic treatment effect; a multi-layer box wall structure is arranged to improve the thermal insulation effect, reduce heat radiation, and reduce the external propagation of noise through multiple medium changes; the internal cavity division design is reasonable, which effectively reduces the volume of the post-processor.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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 the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A post-processor, comprising a housing (1), the housing (1) being provided with an air inlet and an air outlet, characterized in that: The interior of the box (1) is divided into a plurality of cavities by a plurality of partitions, the plurality of cavities comprising an air inlet cavity (1-1) and a buffer cavity (1-2), the air inlet being connected to the air inlet cavity (1-1), and the buffer cavity (1-2) being connected to the air outlet via an SCR unit (4); a silencer (2) is installed on the partition between the air inlet cavity (1-1) and the buffer cavity (1-2), the silencer (2) passes through the partition, and a plurality of through holes are provided on the wall of the silencer (2).

2. The post-processor according to claim 1, characterized in that An inner air intake tube (3) is installed inside the air intake cavity (1-1), one end of the inner air intake tube (3) is connected to the air intake port, and a plurality of through holes are provided on the tube wall of the inner air intake tube (3).

3. The post-processor according to claim 2, characterized in that: The other end of the air intake inner pipe (3) is fixed on the inner wall of the box body (1).

4. The post-processor according to claim 1, characterized in that: The multiple inner cavities also include an air outlet cavity (1-3), the air outlet is arranged on the box wall corresponding to the air outlet cavity (1-3), and the two ends of the SCR unit are respectively connected to the buffer cavity (1-2) and the air outlet cavity (1-3).

5. The post-processor according to claim 1, characterized in that: A plurality of guide vanes (5) are provided on the periphery of the portion of the silencer (2) located in the air inlet cavity (1-1) and / or the portion located in the buffer cavity (1-2); the guide vanes (5) are strip-shaped plates, and the length direction of the guide vanes (5) is arranged along the axial direction of the silencer (2).

6. The post-processor according to any one of claims 1 to 5, characterized in that: The box body (1) comprises a side plate, which is surrounded by a through columnar structure, and the end surfaces of the columnar structure are respectively provided with a first sealing plate and a second sealing plate, and the box body (1) is provided with a first partition plate (6) and a third partition plate (8), the first sealing plate, the first partition plate (6), the third partition plate (8), and the second sealing plate are arranged in sequence and parallel to each other, and a second partition plate (7) is arranged between the first sealing plate and the first partition plate (6), and the second partition plate (7) is perpendicular to the first partition plate (6) and is located in the middle of the first partition plate (6), and a window is provided on the upper part of the first partition plate (6); An air inlet cavity (1-1) is formed between the first baffle plate (6) and the third baffle plate (8) and above the second baffle plate (7); a buffer cavity (1-2) is formed by the lower part of the second baffle plate (7), the first baffle plate (6) and the first sealing plate; and an air outlet cavity (1-3) is formed between the third baffle plate (8) and the second sealing plate.

7. The post-processor according to claim 6, characterized in that: The outer periphery of the side plate is covered with a thermal insulation cotton layer (9).

8. The post-processor according to claim 7, characterized in that: A protective shell (10) is provided outside the thermal insulation cotton layer (9).

9. The post-processor according to claim 6, characterized in that: The first sealing plate and / or the second sealing plate are of double-layer structure.

10. A vehicle, characterized in that: A post-processor as described in any one of claims 1 to 9 is used.

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