Automobile exhaust particulate matter trapping catalyst

Abstract

The present application belongs to the field of tail gas purification equipment, and proposes a kind of automobile exhaust particulate matter trapping catalyst, including intake section, processing section, outlet section, connecting port for installing sensor and filter core, and the processing section is provided with the concave arc shell surface on 4 side edges, and the intake section and intake section are provided with apron, and the apron is provided with the circumferential inner slot hole in the position corresponding with arc shell surface, and the arc shell surface is provided with the outer slot hole corresponding with inner slot hole, and the arc shell surface is provided with the guard plate, and the guard plate and arc shell surface are connected by at least two positioning reinforcing pieces, and the guard plate is provided with two sealing reinforcing pieces on the side surface towards arc shell surface, and each sealing reinforcing piece is matched with a group of inner slot hole and outer slot hole.The present application is reasonable in design, can be exempted from secondary welding, is convenient to clean, is conducive to ensuring the quality of particulate matter trapping catalyst and is conducive to prolonging the actual service life of particulate matter trapping catalyst, and is suitable for large-scale promotion.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of tail gas purification equipment, and particularly relates to a vehicle tail gas particulate matter trapping catalyst. BACKGROUND

[0002] The tail gas particulate matter trapping catalyst is mainly divided into a diesel particulate trap and a gasoline particulate trap, and its main principle is a filtering principle and a regeneration principle. The filtering principle is to trap particulate matters in tail gas through interception, collision, diffusion, gravity settlement and the like, and the regeneration principle is to restore the performance of the trap by regeneration when the particulate matters are accumulated to a certain degree. The tail gas particulate matter trapping catalyst generally comprises a filter core, a catalyst coating, a heating device, a temperature and pressure sensor and the like, such as the diesel vehicle tail gas particulate matter trapping catalyst disclosed in the existing patent CN201410607563.7 and the gasoline vehicle particulate trapping catalyst disclosed in the existing patent CN108979798A.

[0003] Due to the particulate matter trapping catalyst, even if the regeneration is normal in the long-term process, the accumulation of ash will inevitably cause local blockage, which needs to be cleaned by active intervention, otherwise the engine working condition and other devices will be damaged. Since the integration degree of most particulate matter trapping catalysts is high at present, and the diameters of the inlet end and the outlet end are gradually reduced in order to connect the exhaust pipe, but in the later maintenance, especially when cleaning the ash, it is difficult to achieve full coverage of the filter core surface by directly blowing from both ends of the pipe, and the weakening phenomenon of the filter core hole after the blowing pressure reaches the edge position is more obvious. In most cases, the particulate matter trapping catalyst needs to be cut off at both ends to blow the filter core with a high-pressure blowing device, and the cut-off part is welded together after cleaning the filter core, and some need to be polished for appearance. Therefore, such particulate matter trapping catalyst has many problems in maintenance and cleaning, and requires many technical skills of workers, otherwise the use of the particulate matter trapping catalyst after maintenance will also have different degrees of influence. SUMMARY

[0004] The application aims at the above-mentioned technical problems of the tail gas particulate matter trapping catalyst, and provides a vehicle tail gas particulate matter trapping catalyst which is reasonable in design, can be welded twice, is convenient to clean, is beneficial to guarantee the quality of the particulate matter trapping catalyst and is beneficial to prolong the actual service life of the particulate matter trapping catalyst.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is as follows: the automobile exhaust particulate matter trapping catalyst provided by the present application comprises an air inlet section, a treatment section and an air outlet section arranged in sequence, a connecting port for mounting a sensor is arranged on each of the air inlet section and the air outlet section, a filter core is arranged inside the treatment section, the treatment section is a long rectangular structure with open ends and a hollow middle part, a concave arc shell surface is arranged on each of the four side edges of the treatment section, the connecting section of the air inlet section and the treatment section and the connecting section of the air outlet section and the treatment section are all rectangular, a skirt plate is arranged at the end of each of the air inlet section and the air outlet section and is nested with the inner wall of the treatment section, the edge of the skirt plate is welded with the treatment section, a circumferential inner slot is arranged on the skirt plate at the position corresponding to the arc shell surface, an outer slot corresponding to the inner slot is arranged on the arc shell surface, a guard plate is arranged on the arc shell surface, the guard plate and the arc shell surface are connected through at least two positioning reinforcing members, the guard plate is a long strip-shaped structure and its two ends are respectively opposite to the blocking plates arranged on the air inlet section and the air outlet section, two sealing reinforcing members are arranged on the side of the guard plate facing the arc shell surface, and each of the sealing reinforcing members is matched with a group of inner slots and outer slots.

[0006] As a preferred, the included angle of the two end faces of the inner slot in the length direction thereof is 90 degrees and is parallel to the straight plane part of the skirt plate.

[0007] As a preferred, the sealing reinforcing member comprises a sealing protrusion nested with the inner slot and the outer slot, the two ends of the sealing protrusion are provided with compression covers elastically connected with the sealing protrusion, the inside of the compression cover is matched with a U-shaped insertion opening arranged on the sealing protrusion, and the end of the compression cover is abuttingly matched with the inner wall of the inner slot.

[0008] As a preferred, the inside of the compression cover is provided with a spring, the two ends of the sealing protrusion are provided with guide holes for the spring to extend and retract, the inside wall of the compression cover on the two sides is provided with a guide strip with a semicircular section, and the sealing protrusion is provided with a guide groove slidingly matched with the guide strip.

[0009] As a preferred, the positioning reinforcing member comprises an inner thread boss and a positioning screw, the inner thread boss is arranged on the arc shell surface, the side of the guard plate facing the arc shell surface is provided with a positioning groove matched with the inner thread boss, the other side of the guard plate is provided with a countersunk hole penetrating through the positioning groove, and the countersunk hole is used for mounting the positioning screw.

[0010] As a preferred, the guard plate is provided with a plurality of heat dissipation grooves on the side facing away from the arc shell surface.

[0011] As preferred, the inner slot and the outer slot are used to cooperate with the cleaning nozzle, the cleaning nozzle is an L-shaped elbow pipe and it comprises a spraying section and a connecting section, one end of the spraying section is provided with a plug, the side of the spraying section is provided with a plurality of nozzles distributed along the length direction, one end of the connecting section is provided with a connecting nozzle, the connecting nozzle is used to connect with the blowing equipment.

[0012] As preferred, the outer side of the processing section is provided with two pairs of connecting columns, one clamp is arranged on each pair of connecting columns, the clamps are used to fix the spraying section and the connecting section.

[0013] As preferred, the four side edges of the processing section are all 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 application has the advantages and positive effects that:

[0015] The automobile exhaust particulate matter trapping catalyst provided by the application is characterized in that the guard plate is detachably installed on the processing section together with the sealing reinforcement, when the guard plate and the processing section are in the assembled state, the sealing reinforcement can serve as the sealing structure of the inner slot and the outer slot, when the guard plate and the processing section are separated, the inner slot and the outer slot can serve as the working swing nodes of the cleaning nozzle, so that the filter element can be cleaned by the cleaning nozzle, and the cleaning operation does not need to be cut, secondarily welded or the like, which is favorable for improving the cleaning efficiency. The device is reasonable in design, can be secondarily welded, is convenient to clean, is favorable for ensuring the quality of the particulate matter trapping catalyst and prolonging the actual service life of the particulate matter trapping catalyst, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 The isometric view of the automobile exhaust particulate matter trapping catalyst provided by the embodiment;

[0018] Figure 2 The explosion view of the automobile exhaust particulate matter trapping catalyst provided by the embodiment;

[0019] Figure 3 The front view of the automobile exhaust particulate matter trapping catalyst provided by the embodiment;

[0020] Figure 4 The sectional view of the automobile exhaust particulate matter trapping catalyst provided by the embodiment;

[0021] Figure 5 The matching diagram of the processing section, filter core and cleaning nozzle provided for the embodiment;

[0022] Figure 6 The front view of the shield, positioning reinforcement and sealing reinforcement;

[0023] Figure 7 The exploded view of the shield, positioning reinforcement and sealing reinforcement;

[0024] In the above figures:

[0025] 1, air inlet section; 2, processing section; 21, arc shell surface; 22, outer slot hole; 23, flat shell surface; 24, connecting column; 3, air outlet section; 4, connecting port; 5, filter core; 6, apron; 61, inner slot hole; 7, shield; 8, positioning reinforcement; 81, inner threaded boss; 82, positioning screw; 83, positioning groove; 84, counterbore; 9, blocking plate; 10, sealing reinforcement; 101, sealing boss; 102, compression cover; 103, U-shaped embedding port; 104, spring; 105, guide hole; 106, guide strip; 107, guide groove; 11, heat dissipation groove; 12, cleaning nozzle; 121, ejection section; 122, connecting section; 123, plug; 124, nozzle; 125, connecting mouth; 13, clamp. DETAILED DESCRIPTION

[0026] In order to enable the above-mentioned objects, features and advantages of the present application to be more clearly understood, the following will further describe the present application with reference to the drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, the following will appear “up”, “down”, “left”, “right” only indicate the same direction as the up, down, left and right of the drawings, and do not limit the structure.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from the description, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0028] Embodiments, such as Figures 1-7As shown, the automobile exhaust particulate matter trapping catalyst provided by the present application comprises an air inlet section 1, a treatment section 2 and an air outlet section 3 arranged in sequence, a connecting port 4 for installing a sensor is arranged on the air inlet section 1 and the air outlet section 3, and a filter core 5 is arranged inside the treatment section 2. The connecting section of the air inlet section 1 and the treatment section 2 is designed to have a gradually increasing diameter, and the section connected with the exhaust pipe adopts a triangular or circular flange structure; similarly, the connecting section of the air outlet section 3 and the treatment section 2 is designed to have a gradually decreasing diameter, and the section connected with the exhaust pipe adopts a triangular or circular flange structure, and the actual shape meets the requirements of installation on a motor vehicle. The filter core 5 is sprayed with a catalyst coating for trapping and regenerating soot. On this basis, the treatment section 2 is a hollow cuboid structure with open ends, and the hollow part is used to install the filter core 5 matched with the internal contour, four side edges of the treatment section 2 are provided with concave arc shell surfaces 21, the connecting section of the air inlet section 1 and the treatment section 2 and the connecting section of the air outlet section 3 and the treatment section 2 are both rectangular, the end part of the air inlet section 1 and the air outlet section 3 is provided with a skirt plate 6 nested with the inner wall of the treatment section 2, the edge of the skirt plate 6 is welded with the treatment section 2, the skirt plate 6 is provided with a circumferential inner slot hole 61 at the position corresponding to the arc shell surface 21, the arc shell surface 21 is provided with an outer slot hole 22 corresponding to the inner slot hole 61, the arc shell surface 21 is provided with a guard plate 7, the guard plate 7 and the arc shell surface 21 are connected through at least two positioning reinforcing pieces 8, the guard plate 7 is a long strip-shaped structure and its two ends are respectively opposite to the baffle plates 9 arranged on the air inlet section 1 and the air outlet section 3, the guard plate 7 is provided with two sealing reinforcing pieces 10 on the side surface facing the arc shell surface 21, and each sealing reinforcing piece 10 is matched with a group of inner slot holes 61 and outer slot holes 22.

[0029] Specifically, the abutting end of the intake section 1 and the processing section 2, and the abutting end of the exhaust section 3 and the processing section 2 are nested inside the processing section 2 by the apron 6, and after nesting, welding can be used to complete the fixation, and polishing on the production line to ensure the appearance quality of the product; the blocking plate 9 and the apron 6 can be integrally formed with the intake section 1 / exhaust section 3, and the blocking plate 9 can compensate for the space between the apron 6 and the intake section 1 / exhaust section 3 at the corner position, to effectively ensure the sealing quality of the particulate filter. Another function of the blocking plate 9 is to cooperate with the arc shell surface 21 to form a hidden installation groove of the guard plate 7, further ensuring the overall sealing effect of the particulate filter 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, and when the guard plate 7 and the processing section 2 are in an assembled state, the sealing reinforcement 10 can serve as a sealing structure for the inner strip hole 61 and the outer strip hole 22, and when the guard plate 7 and the processing section 2 are separated, the inner strip hole 61 and the outer strip hole 22 can serve as a working swing node for the cleaning nozzle 12. The cleaning nozzle 12 can sweep the range of the filter core 5 by connecting to a high-pressure gas source and using reciprocating swing, and when the cleaning nozzle 12 is matched with the inner strip hole 61 and the outer strip hole 22 at different edge positions, it can basically cover the range of the filter core 5, thereby achieving the purpose of cleaning the filter core 5. The entire cleaning work does not require cutting, secondary welding and other operations, effectively reducing the operation content and the technical operation requirements, which is conducive to improving the cleaning efficiency. Therefore, the device can avoid secondary welding, facilitate cleaning, help to ensure the quality of the particulate filter and prolong the actual service life of the particulate filter, and help to improve the comprehensive utilization rate of the particulate filter.

[0030] In order to improve the sufficiency of cleaning, the angle between the two end faces of the inner strip hole 61 in the length direction is 90 degrees and parallel to the straight plane portion of the apron 6, and the two end faces of the inner strip hole 61 in the length direction are substantially in the same plane as the inner wall of the apron 6 at the same position. In this way, the cleaning nozzle 12 can be cleaned by swinging operation, so that the cleaning nozzle 12 sweeps a sector area with a central angle of 90 degrees at the corresponding corner position, and after the cleaning nozzle 12 performs cleaning work at the four corner positions, the cleaning surface is basically fully covered by the cross section of the filter core 5. Therefore, effective cleaning can be completed without secondary cutting and welding, thereby improving the cleaning efficiency.

[0031] In order to improve the matching of the sealing reinforcement 10 and the inner strip hole 61 and the outer strip hole 22, the sealing reinforcement 10 provided by the application comprises a sealing protrusion 101 which is nested with the inner strip hole 61 and the outer strip hole 22, and the two sides of the sealing protrusion 101 are in close contact with the two sides of the inner strip hole 61 and the outer strip hole 22 to realize sealing. Since the length of the arc edge close to the inner side of the inner strip hole 61 is greater than the length of the arc edge close to the outer side, the maximum arc length of the sealing protrusion 101 is not greater than the minimum arc length of the inner strip hole 61, and in order to improve the sealing performance of the sealing reinforcement 10 on the inner strip hole 61 and the outer strip hole 22, the two ends of the sealing protrusion 101 are provided with compression covers 102 which are elastically connected with the sealing protrusion 101, the inner part of the compression cover 102 is matched with a U-shaped embedding port 103 arranged on the sealing protrusion 101, and the end part of the compression cover 102 is in abutting matching with the inner wall of the inner strip hole 61. In this way, the compression cover 102 can be nested at the end part of the sealing protrusion 101 in a compression mode, and in the state of the minimum compression length, the combined length of the compression cover 102 and the sealing protrusion 101 can effectively make them fit into the inner strip hole 61 and the outer strip hole 22, and when the compression cover 102 enters the inner side of the inner strip hole 61, it can be blocked at the end part of the inner strip hole 61 in an elastic stretching mode, and in addition, the outer side of the protective plate 7 also blocks the outer strip hole 22, so that the sealing performance of the sealing reinforcement 10 on the inner strip hole 61 and the outer strip hole 22 can be effectively improved.

[0032] Further, the inner part of the compression cover 102 is provided with a spring 104, the two ends of the sealing protrusion 101 are provided with guide holes 105 for the elastic extension and contraction of the spring 104, the inner walls of the two sides of the compression cover 102 are provided with guide strips 106 with semicircular cross sections, and the sealing protrusion 101 is provided with guide grooves 107 which are in sliding matching with the guide strips 106. Among them, the spring 104 provides an elastic extension amount for the compression cover 102, the guide groove 107 provides a compression path for the spring, avoids the spring from being separated from the sealing protrusion 101, and makes the compression cover 102 can be reasonably compressed and extended in the inner strip hole 61 to meet the sealing requirements; the matching of the guide groove 107 and the guide strip 106 can provide movement guidance for the compression cover 102, and after being fitted into the inner strip hole 61, the compression cover 102 is prevented from falling into the inside of the particulate matter trapping catalyst.

[0033] In order to improve the detachability of the protective plate 7, the positioning reinforcing part 8 provided by the present application comprises an internally threaded boss 81 and a positioning screw 82, the internally threaded boss 81 is arranged on the arc shell surface 21, the protective plate 7 is provided with a positioning groove 83 matched with the internally threaded boss 81 on the side thereof facing the arc shell surface 21, and the other side of the protective plate 7 is provided with a countersunk hole 84 penetrating through the positioning groove 83, the countersunk hole 84 is used for mounting the positioning screw 82. Among them, the positioning groove 83 provides a mounting allowance for the internally threaded boss 81, which is conducive to the abutting of the shuttle-shaped surface of the protective plate 7 on the arc surface of the arc shell surface 21, and the positioning screw 82 can be connected in a concealed manner through the countersunk connection, and effectively ensures the connection reliability of the protective plate 7 and the arc shell surface 21.

[0034] In order to improve the utilization rate of the protective plate 7, the protective plate 7 provided by the present application is provided with a plurality of heat dissipation grooves 11 on the side away from the arc shell surface 21, and the heat dissipation grooves 11 are at least three groups, each group of heat dissipation grooves 11 is distributed in a spaced manner with the positioning reinforcing part 8, and the groove surface of the heat dissipation groove 11 constitutes a heat dissipation fin, which effectively increases the heat dissipation area of the protective plate 7 without increasing the spatial volume of the protective plate 7, thereby improving the heat dissipation performance of the protective plate 7, and being conducive to reducing the surface working temperature of the particulate matter trapping catalyst.

[0035] In order to improve the cleaning efficiency, the inner strip hole 61 and the outer strip hole 22 are used to cooperate with the cleaning nozzle 12, the cleaning nozzle 12 is an L-shaped elbow pipe and comprises a spraying section 121 and a connecting section 122, one end of the spraying section 121 is provided with a plug 123, the side surface of the spraying section 121 is provided with a plurality of nozzles 124 distributed along the length direction thereof, and one end of the connecting section 122 is provided with a connecting nozzle 125, the connecting nozzle 125 is used to be connected with the blowing equipment. Among them, the spraying section 121 of the cleaning nozzle 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 allowance, which provides sufficient swing allowance for the cleaning nozzle 12, and the distribution density of the nozzles 124 can be reasonably set according to the hole density of the filter element 5, thereby ensuring the cleaning efficiency of the cleaning nozzle 12.

[0036] In order to facilitate cleaning, the outer side of the processing section 2 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 nozzle 12 can be installed on the motor vehicle together with the particulate matter trapping catalyst, and a set of cleaning nozzle 12 can be directly adapted to the particulate matter trapping catalyst of the corresponding specification, thereby ensuring the speciality of the cleaning nozzle 12 and the particulate matter trapping catalyst, and being conducive to the cleaning and maintenance of the particulate matter trapping catalyst in the general repair shop of the motor vehicle.

[0037] Further, the four side edges of the processing section 2 are all flat surfaces 23 connecting four adjacent arc surfaces 21, the length of the spraying section 121 is equal to the length of the flat surface 23, and the length of the connecting section 122 is less than the length of the spraying section 121. The length of the spraying section 121 is designed to be able to sweep a larger fan-shaped area in the corresponding working length, reducing the missed dead angle, and improving the cleaning efficiency.

[0038] The above description is only the preferred embodiment of the present application, and is not intended to limit the other forms of the present application. Any skilled person in the art can use the disclosed technical content to make changes or modifications to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution content of the present application, and in accordance with the technical essence of the present application, still belong to the protection scope of the technical solution of the present application.

Claims

1. A car exhaust particulate matter trapping catalyst, comprising an intake section, a treatment section and an exhaust section arranged in sequence, a connecting port for mounting a sensor is arranged on each of the intake section and the exhaust section, and a filter core is arranged inside the treatment section, characterized in that, The processing section is a cuboid structure with open ends and hollow in the middle, four side edges of the processing section are provided with concave arc shell surfaces, the connection section between the gas inlet section and the processing section and the connection section between the gas outlet section and the processing section are both rectangular, the end of the gas inlet section and the gas outlet section are provided with a skirt plate nested with the inner wall of the processing section, the edge of the skirt plate is welded with the processing section, the skirt plate is provided with a circumferential inner slot at the position corresponding to the arc shell surface, the arc shell surface is provided with an outer slot corresponding to the inner slot, the arc shell surface is provided with a guard plate, the guard plate and the arc shell surface are connected through at least two positioning reinforcing pieces, the guard plate is a long strip shuttle-shaped structure and its two ends are respectively opposite to the blocking plates provided on the gas inlet section and the gas outlet section, the guard plate is provided with two sealing reinforcing pieces on the side surface facing the arc shell surface, each sealing reinforcing piece is matched with a group of inner slots and outer slots, the inner slots and the outer slots are used to match with a cleaning nozzle, the cleaning nozzle is an L-shaped elbow pipe and includes a spraying section and a connecting section, one end of the spraying section is provided with a plug, the side surface of the spraying section is provided with a plurality of nozzles distributed along the length direction, one end of the connecting section is provided with a connecting nozzle used to connect with a blowing device.

2. The automotive exhaust particulate filter according to claim 1, characterized in that, The included angle of the two end faces of the inner slot in the length direction is 90 degrees and is parallel to the straight plane part of the skirt plate.

3. The automotive exhaust particulate filter according to claim 2, characterized in that, The sealing reinforcing piece includes a sealing protrusion nested with the inner slot and the outer slot, both ends of the sealing protrusion are provided with a compression cover elastically connected with the sealing protrusion, the inside of the compression cover is matched with a U-shaped embedding opening provided on the sealing protrusion, the end of the compression cover is abuttingly matched with the inner wall of the inner slot.

4. The automotive exhaust particulate filter according to claim 3, characterized in that, The inside of the compression cover is provided with a spring, both ends of the sealing protrusion are provided with a guide hole for the spring to stretch and contract, both sides of the inner wall of the compression cover are provided with a guide strip with a semicircular section, the sealing protrusion is provided with a guide groove slidingly matched with the guide strip.

5. The automotive exhaust particulate filter according to claim 1, wherein The positioning reinforcing piece includes an inner threaded boss and a positioning screw, the inner threaded boss is provided on the arc shell surface, the guard plate is provided with a positioning groove matched with the inner threaded boss on the side facing the arc shell surface, the other side of the guard plate is provided with a countersunk hole penetrating the positioning groove, the countersunk hole is used to install the positioning screw.

6. The automotive exhaust particulate filter according to claim 1, characterized by The guard plate is provided with a plurality of heat dissipation grooves on the side surface away from the arc shell surface.

7. The automotive exhaust particulate filter according to claim 1, wherein The outer side of the processing section is provided with two pairs of connecting columns, each pair of connecting columns is provided with a clamp, the clamp is used to fix the spraying section and the connecting section.

8. The automotive exhaust particulate filter catalyst according to claim 1, characterized by The four side edge surfaces of the processing section are all 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, the length of the connecting section is less than the length of the spraying section.

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