Automobile exhaust particulate matter trapping catalyst

Abstract

The invention belongs to the field of tail gas purification equipment, and provides an automobile tail gas particulate matter trapping catalytic converter which comprises a gas inlet section, a treatment section, a gas outlet section, a connector used for installing a sensor and a filter element, four side edges of the treatment section are each provided with an inwards-concave arc shell face, and the gas inlet section and the gas outlet section are each provided with an apron board. A circumferential inner strip hole is formed in the position, corresponding to the arc shell face, of the apron board, an outer strip hole corresponding to the inner strip hole is formed in the arc shell face, a protection plate is arranged on the arc shell face, the protection plate and the arc shell face are connected through at least two positioning reinforcing pieces, and two sealing reinforcing pieces are arranged on the side face, facing the arc shell face, of the protection plate; and each sealing reinforcing piece is matched with one group of inner strip holes and outer strip holes. The device is reasonable in design, free of secondary welding, convenient to clean, beneficial for guaranteeing the quality of the particulate matter trapping catalyst and prolonging the actual service life of the particulate matter trapping catalyst, and suitable for large-scale popularization.

Description

Technical Field

[0001] The present invention belongs to the field of exhaust gas purification equipment, and particularly relates to an automotive exhaust particulate trap catalytic converter. Background Art

[0002] Exhaust particulate trap catalytic converters are mainly divided into diesel particulate filters and gasoline particulate filters, and their main principles are the filtration principle and the regeneration principle. Among them, the filtration principle is to capture the particulate matter in the exhaust gas through interception, collision, diffusion, gravitational sedimentation, etc., and the regeneration principle is that when the particulate matter accumulates to a certain extent, regeneration is carried out to restore the performance of the trap. Exhaust particulate trap catalytic converters generally include filter elements, catalyst coatings, heating devices, temperature and pressure sensors, etc. For example, a diesel vehicle exhaust particulate trap catalytic converter disclosed in the existing patent CN201410607563.7, and a gasoline vehicle particulate trap catalytic converter disclosed in CN108979798A.

[0003] Due to the fact that during the long-term operation of the particulate trap catalytic converter, even if the regeneration is normal, it is inevitable that the accumulation of ash causes local blockage, and it is necessary to clean it through active intervention, otherwise it will affect the engine working condition and damage other components. Since most of the current particulate trap catalytic converters have a high degree of integration, and the diameters of the intake end and the exhaust end are gradually reduced in a gradient manner to facilitate connection to the exhaust pipe, but in the later maintenance, especially when it is necessary to clean the ash, it is very difficult to achieve full coverage of the filter element surface by directly blowing from both ends of the pipe, and the weakening phenomenon after the blowing pressure reaches the core holes at the edge position is relatively obvious. In most cases, when performing maintenance operations, it is necessary to cut both ends of the particulate trap catalytic converter, use a high-pressure air blowing device to blow the filter element, weld the cut parts together after cleaning the filter element, and in order to be beautiful, some also need to be polished. Therefore, such particulate trap catalytic converters have many inconveniences in terms of maintenance and cleaning, and certain requirements are put forward for the multiple technologies of workers, otherwise it will also have varying degrees of impact on the use of the particulate trap catalytic converter after maintenance. Summary of the Invention

[0004] In view of the technical problems existing in the above-mentioned exhaust particulate trap catalytic converter, the present invention provides an automotive exhaust particulate trap catalytic converter with reasonable design, which can avoid secondary welding, is convenient for cleaning, is beneficial to ensuring the quality of the particulate trap catalytic converter, and is beneficial to extending the actual service life of the particulate trap catalytic converter.

[0005] To achieve the above object, the technical solution adopted by the present invention is that the automotive exhaust particulate trap catalyst provided by the present invention includes an intake section, a treatment section, and an outlet section arranged in sequence. Connection ports for installing sensors are provided on both the intake section and the outlet section. A filter element is arranged inside the treatment section. The treatment section is a cuboid structure with both ends open and hollow in the middle. Concave arc shell surfaces are provided on the four side edges of the treatment section. The connection cross-sections between the intake section and the treatment section and between the outlet section and the treatment section are both rectangular. Skirts that are nested and matched with the inner walls of the treatment section are provided at the ends of the intake section and the outlet section. The edges of the skirts are welded to the treatment section. The skirts are provided with circumferential inner strip holes at positions corresponding to the arc shell surfaces. Outer strip holes corresponding to the inner strip holes are provided on the arc shell surfaces. A guard plate is provided on the arc shell surfaces. The guard plate and the arc shell surface are connected by at least two positioning and strengthening members. The guard plate is a long strip-shaped fusiform structure, and its two ends are respectively opposite to the blocking plates provided on the intake section and the outlet section. Two sealing and strengthening members are provided on the side of the guard plate facing the arc shell surface. Each sealing and strengthening member is matched with a group of inner strip holes and outer strip holes.

[0006] Preferably, the included angle between the two end faces of the inner strip hole in its length direction is 90 degrees and is parallel to the straight plane part of the skirt.

[0007] Preferably, the sealing and strengthening member includes a sealing convex block that is nested and matched with the inner strip hole and the outer strip hole. Compression caps that are elastically connected to the sealing convex block are provided at both ends of the sealing convex block. The inside of the compression cap is matched with a U-shaped socket provided on the sealing convex block. The end of the compression cap is in abutting cooperation with the inner wall of the inner strip hole.

[0008] Preferably, a spring is provided inside the compression cap. Guide holes for the spring to perform telescopic activities are provided at both ends of the sealing convex block. Guide strips with a semi-circular cross-section are provided on the inner walls of both sides of the compression cap. Guide grooves that are slidably matched with the guide strips are provided on the sealing convex block.

[0009] Preferably, the positioning and strengthening member includes an internally threaded boss and a positioning screw. The internally threaded boss is provided on the arc shell surface. A positioning groove that is matched with the internally threaded boss is provided on the side of the guard plate facing the arc shell surface. A countersunk hole that penetrates the positioning groove is provided on the other side of the guard plate. The countersunk hole is used to install the positioning screw.

[0010] Preferably, a plurality of heat dissipation grooves are provided on the side of the guard plate facing away from the arc shell surface.

[0011] Preferably, the inner strip holes and the outer strip holes are used to cooperate with a cleaning spray pipe, which is an L-shaped elbow pipe and includes a spraying section and a connecting section. A plug is arranged at one end of the spraying section, and a plurality of nozzles distributed along its length direction are arranged on the side surface of the spraying section. A connecting nozzle is arranged at one end of the connecting section, and the connecting nozzle is used to connect with a spraying device.

[0012] Preferably, two pairs of connecting columns are arranged on the outer side of the processing section, and a clamp is arranged on each pair of connecting columns for fixing the spraying section and the connecting section.

[0013] Preferably, the four side prism surfaces of the processing section are flat shell surfaces connecting four adjacent arc shell surfaces. The length of the spraying section is equal to the length of the flat shell surface, and the length of the connecting section is less than the length of the spraying section.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0015] For the automotive exhaust particulate matter trapping catalytic converter provided by the present invention, the guard plate together with the sealing reinforcement is detachably installed on the processing section. When the guard plate and the processing section are in an assembled state, the sealing reinforcement can be used as a sealing structure for the inner strip holes and the outer strip holes. When the guard plate and the processing section are separated, the inner strip holes and the outer strip holes can be used as working swing nodes of the cleaning spray pipe, which is convenient for the cleaning spray pipe to clean the filter element. Moreover, operations such as cutting and secondary welding are not required for the cleaning work, which is beneficial to improving the cleaning efficiency. This device is reasonably designed, can avoid secondary welding, is convenient for cleaning, is beneficial to ensuring the quality of the particulate matter trapping catalytic converter and is beneficial to extending the actual service life of the particulate matter trapping catalytic converter, and is suitable for large-scale popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 An isometric view of the automotive exhaust particulate matter trapping catalytic converter provided for the embodiment;

[0018] Figure 2 An exploded view of the automotive exhaust particulate matter trapping catalytic converter provided for the embodiment;

[0019] Figure 3 A front view of the automotive exhaust particulate matter trapping catalytic converter provided for the embodiment;

[0020] Figure 4 A cross-sectional view of the automotive exhaust particulate matter trapping catalytic converter provided for the embodiment;

[0021] Figure 5 Schematic diagram of the cooperation of the treatment section, filter element and cleaning nozzle provided for the embodiment;

[0022] Figure 6 Front view of the guard plate, positioning reinforcement and sealing reinforcement;

[0023] Figure 7 Exploded view of the guard plate, positioning reinforcement and sealing reinforcement;

[0024] In the above figures:

[0025] 1. Intake section; 2. Treatment section; 21. Arc shell surface; 22. Outer strip hole; 23. Flat shell surface; 24. Connecting column; 3. Outlet section; 4. Connection port; 5. Filter element; 6. Skirt board; 61. Inner strip hole; 7. Guard plate; 8. Positioning reinforcement; 81. Inner thread boss; 82. Positioning screw; 83. Positioning groove; 84. Countersunk head hole; 9. Plug board; 10. Sealing reinforcement; 101. Sealing convex block; 102. Compression cover; 103. U-shaped socket; 104. Spring; 105. Guide hole; 106. Guide strip; 107. Guide groove; 11. Heat dissipation groove; 12. Cleaning nozzle; 121. Spraying section; 122. Connecting section; 123. Plug; 124. Nozzle; 125. Connecting nozzle; 13. Clamp. Detailed implementation mode

[0026] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. For the convenience of narration, words such as "upper", "lower", "left" and "right" hereinafter only represent the same directions as the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

[0027] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed in the following specification.

[0028] Embodiment, as Figures 1 - 7As shown in the figure, the automotive exhaust particulate trap catalyst provided by the present invention includes an intake section 1, a treatment section 2, and an exhaust section 3 arranged in sequence. Connection ports 4 for installing sensors are provided on both the intake section 1 and the exhaust section 3. A filter element 5 is arranged inside the treatment section 2. Among them, the connection part between the intake section 1 and the treatment section 2 is designed with a gradually increasing diameter from small to large, and the part connecting the intake end to the exhaust pipe adopts a triangular or circular flange structure; similarly, the connection part between the exhaust section 3 and the treatment section 2 is designed with a gradually decreasing diameter from large to small, and the part connecting to the exhaust pipe adopts a triangular or circular flange structure, and its actual shape meets the requirements for installation on a motor vehicle. A catalyst coating is sprayed on the filter element 5 for soot trapping and regeneration. On this basis, the treatment section 2 provided by the present invention is a cuboid structure with open ends at both ends and a hollow middle. The hollow part is used to install a filter element 5 that matches its internal contour. Concave arc shell surfaces 21 are provided on the four side edges of the treatment section 2. The connection cross-sections between the intake section 1 and the treatment section 2 and between the exhaust section 3 and the treatment section 2 are both rectangular. Skirt plates 6 that are nested and matched with the inner wall of the treatment section 2 are provided at the ends of the intake section 1 and the exhaust section 3. The edge of the skirt plate 6 is welded to the treatment section 2. The skirt plate 6 is provided with circumferential inner strip holes 61 at positions corresponding to the arc shell surfaces 21. Outer strip holes 22 corresponding to the inner strip holes 61 are provided on the arc shell surfaces 21. A guard plate 7 is provided on the arc shell surfaces 21. The guard plate 7 and the arc shell surfaces 21 are connected by at least two positioning and strengthening members 8. The guard plate 7 is a long and spindle-shaped structure, and its two ends are respectively opposite to the plug plates 9 provided on the intake section 1 and the exhaust section 3. Two sealing and strengthening members 10 are provided on the side of the guard plate 7 facing the arc shell surfaces 21. Each of the sealing and strengthening members 10 cooperates with a group of inner strip holes 61 and outer strip holes 22.

[0029] Specifically, the docking ends of the intake section 1 and the processing section 2, as well as the docking ends of the outlet section 3 and the processing section 2, are nested inside the processing section 2 by the skirt plate 6. After nesting, welding can be used to complete the fixation, and grinding and polishing are carried out on the production line to ensure the appearance quality of the product when leaving the factory. The blocking plate 9 and the skirt plate 6 can be integrally formed with the intake section 1 / outlet section 3, and the blocking plate 9 can compensate for the vacancies at the corner positions between the skirt plate 6 and the intake section 1 / outlet section 3, so as to effectively ensure the sealing quality of the particulate trap catalytic converter. Another function of the blocking plate 9 is that it can cooperate with the arc shell surface 21 to form a concealed installation groove for the guard plate 7, further ensuring the overall sealing effect of the particulate trap catalytic converter after the guard plate 7 is assembled. In this way, the guard plate 7 together with the sealing reinforcement 10 can be detachably installed on the processing section 2. When the guard plate 7 and the processing section 2 are in the assembled state, the sealing reinforcement 10 can serve as the sealing structure for the inner strip hole 61 and the outer strip hole 22. When the guard plate 7 is separated from the processing section 2, the inner strip hole 61 and the outer strip hole 22 can be used as the working swing nodes for the cleaning nozzle 12. By connecting to a high-pressure air source, the cleaning nozzle 12 can sweep the range where the filter element 5 is located in a reciprocating swing manner. And by matching the cleaning nozzle 12 with the inner strip hole 61 and the outer strip hole 22 at different edge positions, the range where the filter element 5 is located can be basically covered, so as to achieve the purpose of cleaning the filter element 5. The entire cleaning work does not require operations such as cutting and secondary welding, the operation content is effectively reduced, and the requirements for technical operations are also reduced, which is beneficial to improving the cleaning efficiency. Therefore, this device can avoid secondary welding, is easy to clean, is beneficial to ensuring the quality of the particulate trap catalytic converter and is beneficial to extending the actual service life of the particulate trap catalytic converter, and is beneficial to improving the comprehensive utilization rate of the particulate trap catalytic converter.

[0030] In order to improve the thoroughness of cleaning, the included angle between the two end faces of the inner strip hole 61 in its length direction provided by the present invention is 90 degrees and is parallel to the straight plane part of the skirt plate 6. The two end faces of the inner strip hole 61 in its length direction and the inner wall of the skirt plate 6 in the corresponding orientation are basically in the same plane. In this way, the cleaning nozzle 12 can be swung to make the cleaning nozzle 12 sweep a sector area with a central angle of 90 degrees at the corresponding corner positions. And after the cleaning nozzle 12 performs the cleaning work at 4 corner positions, the cleaning surface basically completely covers the cross-section of the filter element 5. Therefore, effective cleaning can be completed without secondary cutting and welding, thereby improving the cleaning efficiency.

[0031] In order to improve the fit between the sealing reinforcement member 10 and the inner strip hole 61 and the outer strip hole 22, the sealing reinforcement member 10 provided by the present invention includes a sealing convex block 101 that is nested and fitted with the inner strip hole 61 and the outer strip hole 22. The two sides of the sealing convex block 101 are in contact with the two sides of the inner strip hole 61 and the outer strip hole 22 to achieve sealing. Since the length of the inner arc side of the inner strip hole 61 is greater than the length of the outer arc side, the maximum arc length of the sealing convex block 101 is not greater than the minimum arc length of the inner strip hole 61. In order to improve the sealing performance of the sealing reinforcement member 10 for the inner strip hole 61 and the outer strip hole 22, compression caps 102 that are elastically connected to the sealing convex block 101 are provided at both ends of the sealing convex block 101. The inside of the compression cap 102 is fitted with a U-shaped recess 103 provided on the sealing convex block 101, and the end of the compression cap 102 is in contact and fitted with the inner wall of the inner strip hole 61. In this way, the compression cap 102 can be nested at the end of the sealing convex block 101 by compression. In the state where the compression length is the smallest, the combined length of the compression cap 102 and the sealing convex block 101 allows the two to be effectively inserted into the inner strip hole 61 and the outer strip hole 22. And when the compression cap 102 enters the inner part of the inner strip hole 61, it can block the end of the inner strip hole 61 by elastic stretching. Coupled with the fact that the guard plate 7 also blocks the outer strip hole 22 on the outside, the sealing performance of the sealing reinforcement member 10 for the inner strip hole 61 and the outer strip hole 22 can be effectively improved.

[0032] Furthermore, a spring 104 is provided inside the compression cap 102 provided by the present invention. Guide holes 105 for the spring 104 to perform telescopic movement are provided at both ends of the sealing convex block 101. Guide strips 106 with a semi-circular cross-section are provided on both inner walls of the compression cap 102. Guide grooves 107 that are slidably fitted with the guide strips 106 are provided on the sealing convex block 101. Among them, the spring 104 provides an elastic telescopic margin for the compression cap 102, and the guide groove 107 provides a compression path for the spring to prevent the spring from detaching from the sealing convex block 101, so that the compression cap 102 can be reasonably compressed and extended in the inner strip hole 61, thereby meeting the sealing requirements; the cooperation between the guide groove 107 and the guide strip 106 can provide movement guidance for the compression cap 102 and prevent the compression cap 102 from falling into the interior of the particulate trap catalytic converter after being inserted into the inner strip hole 61.

[0033] To improve the detachability of the guard plate 7, the positioning and strengthening member 8 provided by the present invention includes an internal thread boss 81 and a positioning screw 82. The internal thread boss 81 is arranged on the arc-shaped shell surface 21. On the side of the guard plate 7 facing the arc-shaped shell surface 21, there is a positioning groove 83 that cooperates with the internal thread boss 81. On the other side of the guard plate 7, there is a counterbore 84 that penetrates the positioning groove 83, and the counterbore 84 is used to install the positioning screw 82. Among them, the positioning groove 83 provides an installation margin for the internal thread boss 81, which is beneficial for the fusiform surface of the guard plate 7 to abut against the arc surface of the arc-shaped shell surface 21. And the positioning screw 82 can achieve a concealed connection through a countersunk connection method, and effectively ensure the connection reliability between the guard plate 7 and the arc-shaped shell surface 21.

[0034] To improve the utilization rate of the guard plate 7, the guard plate 7 provided by the present invention is provided with a plurality of heat dissipation grooves 11 on the side facing away from the arc-shaped shell surface 21. There are at least three groups of heat dissipation grooves 11. Each group of heat dissipation grooves 11 is distributed at intervals with the positioning and strengthening member 8. The groove surface of the heat dissipation grooves 11 constitutes heat dissipation fins. Without increasing the spatial volume of the guard plate 7, the heat dissipation area of the guard plate 7 is effectively increased, thereby improving the heat dissipation performance of the guard plate 7, which is beneficial for reducing the surface working temperature of the particulate trap catalyst.

[0035] To improve the cleaning efficiency, the inner strip hole 61 and the outer strip hole 22 provided by the present invention are used to cooperate with the cleaning spray pipe 12. The cleaning spray pipe 12 is an L-shaped elbow pipe and includes a spraying section 121 and a connecting section 122. One end of the spraying section 121 is provided with a plug 123, and the side of the spraying section 121 is provided with a plurality of nozzles 124 distributed along its length direction. One end of the connecting section 122 is provided with a connecting nozzle 125, and the connecting nozzle 125 is used to connect with the spraying equipment. Among them, the spraying section 121 of the cleaning spray pipe 12 can extend from the inner strip hole 61 and the outer strip hole 22 to the inside of the processing section 2, and the inner strip hole 61 and the outer strip hole 22 have a certain length margin, providing sufficient swing margin for the cleaning spray pipe 12. And the distribution density of the nozzles 124 can be reasonably set according to the hole density of the filter element 5, so as to ensure the cleaning efficiency of the cleaning spray pipe 12.

[0036] To facilitate cleaning, the outside of the processing section 2 provided by the present invention is provided with two pairs of connecting columns 24, and each pair of connecting columns 24 is provided with a clamp 13, and the clamp 13 is used to fix the spraying section 121 and the connecting section 122. In this way, the cleaning spray pipe 12 can be installed on the motor vehicle together with the particulate trap catalyst. A set of cleaning spray pipes 12 can directly adapt to the particulate trap catalyst of the corresponding specification, ensuring the specificity of the cleaning spray pipe 12 and the particulate trap catalyst, which is beneficial for the motor vehicle to complete the cleaning and maintenance of the particulate trap catalyst in a general repair shop.

[0037] Furthermore, the four side edges of the processing section 2 provided by the present invention are all flat shell surfaces 23 connecting four adjacent arc shell surfaces 21. The length of the ejection section 121 is equal to the length of the flat shell surface 23, and the length of the connecting section 122 is less than the length of the ejection section 121. By designing the length of the ejection section 121, it can sweep a large sector area at the corresponding working length, reduce the missed dead corners, and is beneficial to improving the cleaning efficiency.

[0038] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An automotive exhaust particulate trap catalytic converter, comprising an intake section, a treatment section, and an exhaust section arranged in sequence. Connection ports for installing sensors are provided on both the intake section and the exhaust section. A filter element is provided inside the treatment section. It is characterized in that, The treatment section is a cuboid structure with open ends and a hollow middle. Concave arc shell surfaces are provided on the four side edges of the treatment section. The connection cross-sections between the intake section and the treatment section and between the outlet section and the treatment section are both rectangular. Skirts that are nested and fitted with the inner wall of the treatment section are provided at the ends of the intake section and the outlet section. The edge of the skirt is welded to the treatment section. The skirt is provided with circumferential inner strip holes at positions corresponding to the arc shell surfaces. Outer strip holes corresponding to the inner strip holes are provided on the arc shell surfaces. A guard plate is provided on the arc shell surface. The guard plate and the arc shell surface are connected by at least two positioning and strengthening members. The guard plate is a long strip-shaped fusiform structure, and its two ends are respectively opposite to the plug plates provided on the intake section and the outlet section. Two sealing and strengthening members are provided on the side of the guard plate facing the arc shell surface, and each sealing and strengthening member cooperates with a group of inner strip holes and outer strip holes.

2. The automotive exhaust particulate trap catalyst according to claim 1, wherein The included angle between the two end faces of the inner strip hole in its length direction is 90 degrees and is parallel to the straight plane part of the skirt.

3. The automotive exhaust particulate trap catalyst according to claim 2, wherein The sealing and strengthening member includes a sealing convex block that is nested and fitted with the inner strip hole and the outer strip hole. Compression caps that are elastically connected to the sealing convex block are provided at both ends of the sealing convex block. The inside of the compression cap is fitted with a U-shaped socket provided on the sealing convex block, and the end of the compression cap is in abutting fit with the inner wall of the inner strip hole.

4. The automotive exhaust particulate trap catalytic converter according to claim 3, characterized in that, A spring is provided inside the compression cap. Guide holes for the spring to perform telescopic activities are provided at both ends of the sealing convex block. Guide strips with semi-circular cross-sections are provided on the inner walls on both sides of the compression cap. Guide grooves that are slidably fitted with the guide strips are provided on the sealing convex block.

5. The automotive exhaust particulate trap catalytic converter according to claim 1, characterized in that, The positioning and strengthening member includes an internal thread boss and a positioning screw. The internal thread boss is provided on the arc shell surface. A positioning groove that is fitted with the internal thread boss is provided on the side of the guard plate facing the arc shell surface. A counterbore that penetrates the positioning groove is provided on the other side of the guard plate, and the counterbore is used to install the positioning screw.

6. The automotive exhaust particulate trap catalyst according to claim 1, wherein, A plurality of heat dissipation grooves are provided on the side of the guard plate facing away from the arc shell surface.

7. The automotive exhaust particulate trap catalyst according to any one of claims 1-6, characterized in that, The inner strip holes and the outer strip holes are used to cooperate with a cleaning spray pipe. The cleaning spray pipe is an L-shaped elbow pipe and includes a spraying section and a connecting section. A plug is provided at one end of the spraying section. A plurality of nozzles distributed along its length direction are provided on the side of the spraying section. A connecting nozzle is provided at one end of the connecting section, and the connecting nozzle is used to connect with a blowing device.

8. The automotive exhaust particulate trap catalyst according to claim 7, characterized in that, Two pairs of connecting columns are provided on the outside of the treatment section. A clamp is provided on each pair of connecting columns, and the clamp is used to fix the spraying section and the connecting section.

9. The automotive exhaust particulate trap catalyst according to claim 7, characterized in that, The four side edge surfaces of the treatment section are flat shell surfaces that connect four adjacent arc shell surfaces. The length of the spraying section is equal to the length of the flat shell surface, and the length of the connecting section is less than the length of the spraying section.

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