Tail gas catalytic converter

Abstract

The utility model relates to a tail gas catalytic converter, and relates to the technical field of tail gas catalysis, the tail gas catalytic converter comprises a shell, a mounting plate and a catalytic plate, the catalytic plate comprises a plurality of wave crest parts and a plurality of wave trough parts, the wave trough parts are arranged on the mounting plate through first connecting assemblies, and after winding, the wave crest parts are connected with the mounting plate through second connecting assemblies; air channels are formed between the wave crest parts and the wave trough parts and the mounting plate, and a plurality of ventilation holes which allow air to pass through and are communicated with the air channels are formed in the mounting plate. The wave trough parts and the wave crest parts are fixedly mounted on the mounting plate through the first connecting assemblies and the second connecting assemblies, the connecting strength between the catalytic plate and the mounting plate is improved, the multiple air channels communicate with one another through the ventilation holes, gas distribution is more uniform, the gas turbulence probability is increased, and the catalytic effect is improved. And meanwhile, the service life and the catalytic effect of the catalyst are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of tail gas treatment, in particular to a tail gas catalytic converter. BACKGROUND

[0002] When a motor vehicle is working, tail gas emitted by the motor vehicle contains many harmful pollutants, such as carbon monoxide (CO), sulfur dioxide (SO2), hydrocarbon chemicals (HC), nitrogen oxides (NOx) and the like. When these harmful gases act together with particulate matters in the atmosphere to form aerosols, the aerosols are long-term suspended in the atmosphere and are in the breathing zone of the crowd, which can cause serious threats to the survival of human beings and the growth of animals and plants. Therefore, in order to protect the environment, a gasoline engine tail gas catalytic converter is needed.

[0003] In the prior art, the application with the application publication number CN112922698A relates to a tail gas catalytic converter and a production process using the catalytic converter, which comprises a cylindrical shell, a mounting plate is arranged on the shell, a corrugated catalytic plate is arranged on the mounting plate, the catalytic plate is provided with a catalyst layer, the mounting plate and the catalytic plate are sequentially and alternately overlapped and wound along the axial direction of the shell, and an air duct is formed between the catalytic plate and the shell.

[0004] The wave trough part is connected with the mounting plate, and after the catalytic plate and the mounting plate are wound, the wave crest part is abutted on the mounting plate to form a plurality of air ducts. The gas moves through the air ducts, and the gas moves to form a relatively large pressure on the mounting plate and the catalytic plate. At the same time, only the wave trough part is connected with the mounting plate, so that the strength of the connection between the catalytic plate and the mounting plate is low, thereby reducing the stability between the mounting plate and the catalytic plate, reducing the durability of the catalytic converter, increasing the risk of damage to the catalytic converter, and reducing the service life of the catalytic converter. CONTENT OF THE UTILITY MODEL

[0005] In order to improve the service life of the catalytic converter, the application provides a tail gas catalytic converter.

[0006] The application provides a tail gas catalytic converter, which adopts the following technical scheme:

[0007] A tail gas catalytic converter comprises a cylindrical shell, a mounting plate arranged on the shell and a catalytic plate, the catalytic plate is provided with a catalyst layer, the mounting plate and the catalytic plate are sequentially and alternately overlapped and wound along the axial direction of the shell, the catalytic plate comprises a plurality of wave crest parts and a plurality of wave trough parts, the wave trough parts are arranged on the mounting plate through a connecting assembly one and are connected with the mounting plate through a connecting assembly two after being wound, so that the wave crest parts and the wave trough parts form air ducts with the mounting plate, and the mounting plate is provided with a plurality of ventilation holes through which the gas passes and which are in communication with the air ducts.

[0008] By adopting the technical scheme, when installing, the plurality of wave trough portions are fixedly installed on the mounting plate through the connecting assembly one, then the mounting plate and the catalytic plate are wound, and the wave crest portions are connected with the mounting plate through the connecting assembly two, so that the plurality of wave trough portions and the plurality of wave crest portions are fixedly connected with the mounting plate, and therefore the connection strength between the catalytic plate and the mounting plate is greatly improved, the durability of the catalytic converter is improved, the risk of damage of the catalytic converter is reduced, and the service life of the catalytic converter is improved.

[0009] Meanwhile, the plurality of air ducts are communicated with each other through the ventilation holes, when there is a deviation in the air pressure between the adjacent two air ducts, the gas can move between the adjacent two air ducts through the ventilation holes, so that the gas distribution is more uniform, the risk of excessive local air pressure of the gas on the catalytic plate and the mounting plate is reduced, and therefore the durability of the catalytic converter is further improved, the risk of damage of the catalytic converter is reduced, and the ventilation hole design also increases the probability of gas turbulence, improves the catalytic effect of the catalytic converter, and simultaneously improves the service life and the catalytic effect of the catalytic converter.

[0010] Optionally, the diameter of the ventilation hole is 2.2 mm, the center distance between the adjacent two ventilation holes is 3.0-3.4 mm, and the distance between the adjacent two wave crest portions is 3.1-3.2 mm.

[0011] By adopting the technical scheme, the diameter and arrangement density of the ventilation hole are closely related to the strength of the mounting plate and the ventilation effect, increasing the diameter and arrangement density of the ventilation hole can improve the ventilation effect, but greatly reduces the strength of the mounting plate and the catalytic plate, on the contrary, reducing the diameter and arrangement density of the ventilation hole can improve the strength of the mounting plate and the catalytic plate, but reduces the ventilation effect, therefore the diameter and arrangement density of the ventilation hole are reasonably designed, and the arrangement distance of the ventilation hole is close to the distance between the two wave crest portions, so that the design of the ventilation hole can cooperate with the wave crest portion and the wave trough portion, and simultaneously improve the strength and the ventilation effect of the catalytic converter, thereby improving the service life of the catalytic converter.

[0012] Optionally, the mounting plate and the catalytic plate are inserted and installed in the shell after being wound for positioning, a plurality of accommodating grooves are formed in the inner side wall of the shell, and welding paste for fixing the mounting plate is applied to the accommodating grooves and enters the ventilation holes to realize fixation.

[0013] By adopting the technical scheme, the welding paste is applied to the plurality of accommodating grooves, then the mounting plate and the catalytic plate are inserted and installed in the shell after being wound, and the shell and the welding paste cooperate to position the wound mounting plate and catalytic plate, and the welding paste also enters the ventilation holes during the installation process, the ventilation holes into which the welding paste enters are blocked by the shell and cannot realize the ventilation effect, and the entering welding paste can further improve the fixing effect of the mounting plate, the ventilation holes can realize ventilation and supply of the welding paste for fixation at the same time, and the above two effects can improve the service life of the catalytic converter.

[0014] Optionally, a plurality of installation grooves corresponding to the wave troughs are formed on the installation plate, and the connecting assembly comprises:

[0015] two groups of connecting pieces arranged on the wave troughs and located on both sides of the wave trough axis, the two groups of connecting pieces abutting on the installation grooves and making the wave troughs parallel to the installation grooves and forming a connecting cavity therebetween, each group of connecting pieces being spaced apart along the wave trough axis and having a plurality of connecting pieces, and a support cavity being formed between adjacent two connecting pieces and communicating with the connecting cavity;

[0016] a fixing layer formed by applying solder paste on the installation grooves, the connecting pieces passing through the fixing layer and abutting on the installation grooves for positioning, and the wave troughs being close to and extruding the solder paste and making the solder paste filled in the connecting cavity and the support cavity, and the wave troughs, the installation grooves, the connecting pieces and the installation plate being integrated.

[0017] By adopting the above technical scheme, the solder paste is applied into the installation grooves, then the two groups of connecting pieces on the wave troughs pass through the solder paste and abut on the installation grooves, the wave troughs are close to and extrude the solder paste, the connecting cavity is formed between the wave troughs and the installation grooves, the support cavity is formed between adjacent two connecting pieces, the solder paste is filled in the connecting cavity and the support cavity to form the fixing layer after being extruded, the wave troughs, the installation grooves, the connecting pieces and the installation plate are integrated, and the connecting pieces are embedded in the solder paste, and the installation grooves are parallel to the wave troughs, so that the thickness of the fixing layer is uniform, thereby saving the solder paste and improving the fixing effect, and further improving the service life of the catalytic converter.

[0018] Optionally, a fixing portion is formed on the connecting piece and abuts on the installation groove.

[0019] By adopting the above technical scheme, the connecting piece drives the fixing portion to pass through the solder paste and abut on the installation groove for positioning, so that the solder paste is extruded and filled in the connecting cavity, the fixing portion is embedded in the solder paste, and the solder paste abuts on the fixing portion for positioning when the connecting piece is away from the installation groove, thereby greatly improving the connecting strength of the catalytic plate and the installation plate and the service life of the catalytic converter.

[0020] Optionally, the connecting piece is formed by stamping the wave trough and forming a connecting hole communicating between the two air ducts.

[0021] By adopting the above technical scheme, the convenience and firmness of the connecting piece are improved when being arranged, and the connecting hole is formed to make the two air ducts communicate, so that the gas can move through the two connecting holes, the risk of excessive local air pressure is further reduced, and the service life of the catalytic converter is further improved.

[0022] Optionally, the connecting pieces located on both sides of the axis of the wave trough part are located on the side walls opposite to the two connecting holes.

[0023] By adopting the above technical scheme, the overlapping area of the fixing layer and the two connecting holes is reduced, the risk of the solder paste moving out through the connecting hole is reduced, the fixing effect of the solder paste into the connecting hole is achieved, the connection strength is further improved, and the service life of the catalytic converter is improved.

[0024] Optionally, a plurality of fixing grooves corresponding to the wave crest part are arranged on the mounting plate in a spaced manner, and the connecting assembly two is the same in structure as the connecting assembly one and is fixedly connected with the fixing grooves and the wave crest part through the solder paste.

[0025] By adopting the above technical scheme, the plurality of wave trough parts are first fixedly connected to the mounting plate through the connecting assembly one, then the solder paste is applied to the plurality of fixing grooves, and the catalytic plate and the mounting plate are wound, so that the plurality of connecting assembly twos on the wave crest part are sequentially inserted into the plurality of solder pastes and positioned against the fixing grooves until the winding is completed, so that the solder paste can also fix and mount the wave crest part to the mounting plate, and the wave trough part and the wave crest part are connected with the mounting plate, thereby greatly improving the service life of the catalytic converter.

[0026] Optionally, the housing is provided with a positioning assembly for positioning both ends of the mounting plate, and the positioning assembly comprises:

[0027] An arc-shaped strip is arranged on the housing, and an arc-shaped groove for clamping and matching the arc-shaped strip is formed in the mounting plate.

[0028] A positioning ring is detachably arranged on the housing and positioned against one side of the mounting plate away from the arc-shaped strip.

[0029] By adopting the above technical scheme, the catalytic plate and the mounting plate are inserted and mounted in the housing after being wound, so that the arc-shaped strip is clamped and mounted to the arc-shaped groove for positioning, and then the positioning ring is fixedly mounted on the housing, and the positioning ring is positioned against the mounting plate, thereby further improving the stability of the catalytic plate and the mounting plate after being mounted, and improving the service life of the catalytic converter.

[0030] In summary, the present application has at least one of the following beneficial technical effects:

[0031] 1. The wave trough part is fixedly mounted on the mounting plate through the connecting assembly one, and then the wave crest part is connected with the mounting plate through the connecting assembly two, so that the plurality of wave trough parts and the plurality of wave crest parts are fixedly connected with the mounting plate, thereby greatly improving the connection strength between the catalytic plate and the mounting plate, improving the durability of the catalytic converter, reducing the risk of damage to the catalytic converter, and improving the service life of the catalytic converter.

[0032] 2、Through the ventilation holes, the plurality of air ducts are communicated with each other, when there is a deviation in the air pressure between two adjacent air ducts, the gas can move between the two adjacent air ducts through the ventilation holes, so that the gas distribution is more uniform, the risk of excessive local air pressure of the gas on the catalytic plate and the mounting plate is reduced, so the durability of the catalytic converter is further improved, the risk of damage to the catalytic converter is reduced, and the design of the ventilation holes also increases the probability of gas turbulence, improves the catalytic effect of the catalytic converter, and thus improves the service life and catalytic effect of the catalytic converter. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a schematic view of a three-dimensional structure of the tail gas catalytic converter;

[0034] Figure 2 is a schematic view of a structure after the trough part is connected with the mounting plate;

[0035] Figure 3 is a schematic view of a cross section of the trough part and the mounting plate, mainly showing a connecting assembly one;

[0036] Figure 4 is an exploded view of a partial structure of the tail gas catalytic converter, mainly showing a positioning assembly;

[0037] Figure 5 is a schematic view of a structure of the mounting plate, and the ventilation holes are omitted.

[0038] Reference signs: 1, shell; 11, mounting plate; 12, ventilation hole; 13, mounting groove; 15, fixed block; 16, arc-shaped groove; 17, positioning groove; 18, clamping groove; 2, catalytic plate; 21, wave crest part; 22, trough part; 3, connecting assembly one; 31, connecting sheet; 32, fixed layer; 33, connecting cavity; 35, fixed part; 36, connecting hole; 4, positioning assembly; 41, arc-shaped strip; 42, positioning ring; 5, containing groove; 6, air duct. DETAILED DESCRIPTION

[0039] The application will be further described below.

[0040] The application discloses a tail gas catalytic converter.

[0041] Reference Figures 1-3The exhaust catalytic converter comprises a cylindrical shell 1, a mounting plate 11 arranged on the shell 1, and a catalytic plate 2, the largest area of the catalytic plate 2 is coated with a catalyst layer on the opposite side walls, the mounting plate 11 and the catalytic plate 2 are sequentially and alternately wound along the axis direction of the shell 1, so that the mounting plate 11 and the catalytic plate 2 are in a spiral shape; the catalytic plate 2 comprises a plurality of wave crest portions 21 and a plurality of wave trough portions 22, the wave trough portions 22 are arranged on the mounting plate 11 through a connecting assembly one 3 and are wound to make the wave crest portions 21 connected to the mounting plate 11 through a connecting assembly two, so that the wind channels 6 are formed between the wave crest portions 21, the wave trough portions 22 and the mounting plate 11, and a plurality of ventilation holes 12 are arranged on the mounting plate 11 and are in communication with the wind channels 6.

[0042] The width of the catalytic plate 2 and the mounting plate 11 is the same, and the corresponding side walls are flush when they are connected to each other, a plurality of groups of ventilation holes 12 are arranged along the length direction of the mounting plate 11, and the plurality of groups of ventilation holes 12 are arranged one by one corresponding to the plurality of wind channels 6, and each group of ventilation holes 12 is arranged along the width direction of the mounting plate 11; the diameter of the ventilation hole 12 is 2.2 mm, the center distance between the adjacent two ventilation holes 12 is 3.0-3.4 mm, the center distance can be 3.0, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, the distance between the adjacent two wave crest portions 21 is 3.1-3.2 mm, and the distance can be 3.1 mm or 3.2 mm, and the center distance between the adjacent two wave crest portions 21 and the adjacent two ventilation holes 12 is the best.

[0043] The mounting plate 11 is provided with a mounting groove 13 and a fixing groove on the opposite side walls, the mounting groove 13 and the fixing groove penetrate the mounting plate 11 along the width direction of the mounting plate 11, the mounting groove 13 and the fixing groove are both arc-shaped and are arranged in a staggered state along the length direction of the mounting plate 11; the axis of the wave crest portion 21 and the wave trough portion 22 is parallel to the width direction of the mounting plate 11.

[0044] The connecting assembly one 3 is arranged in a plurality of groups, and each mounting groove 13 is provided with the connecting assembly one 3, the connecting assembly one 3 is arranged on the wave trough portion 22 and connected to the mounting groove 13, the connecting assembly two is arranged in a plurality of groups, and each fixing groove is provided with the connecting assembly two, the connecting assembly two is arranged on the wave crest portion 21 and connected to the fixing groove, the connecting assembly two and the connecting assembly one 3 are the same in structure, and the connecting assembly one 3 is taken as an example for explanation.

[0045] The connecting assembly 3 comprises two groups of connecting pieces 31 and a fixing layer 32. The two groups of connecting pieces 31 are arranged on both sides of the axis of the valley portion 22 and are mirror-symmetrically arranged with respect to the axis of the valley portion 22. Each group of connecting pieces 31 is spaced apart along the axis of the valley portion 22 and comprises a plurality of connecting pieces 31. The two groups of connecting pieces 31 are positioned against the mounting groove 13, so that the valley portion 22 is parallel to the mounting groove 13, and a connecting cavity 33 is formed between the valley portion 22 and the mounting groove 13. A support cavity 34 is formed between two adjacent connecting pieces 31 on the same side of the axis of the valley portion 22 and is in communication with the connecting cavity 33. When the connecting piece 31 on the peak portion 21 is positioned against the mounting groove 13, the peak portion 21 is parallel to the fixing groove.

[0046] The connecting piece 31 is integrally provided with a fixing portion 35 on the end away from the valley portion 22. The fixing portion 35 is positioned against the mounting groove 13. The connecting piece 31 and the fixing portion 35 are formed by stamping the valley portion 22. The stamping forms a connecting hole 36 in the valley portion 22. The connecting hole 36 is in communication with two adjacent air ducts 6.

[0047] The fixing layer 32 is formed by applying solder paste to the mounting groove 13. The solder paste is applied to the mounting groove 13. The fixing portion 35 and the connecting piece 31 pass through the solder paste. The fixing portion 35 is positioned against the mounting groove 13, and the connecting piece 31 is positioned against the mounting groove 13. The valley portion 22 is close to the solder paste and presses the solder paste. The solder paste fills the connecting cavity 33 and the plurality of support cavities 34. The valley portion 22, the mounting groove 13, the connecting piece 31, and the fixing portion 35 are connected as one. The solder paste is also positioned against the fixing portion 35 to prevent the valley portion 22 from being separated from the mounting groove 13. Thus, the plurality of valley portions 22 and the mounting plate 11 are fixedly connected.

[0048] The two connecting pieces 31 on both sides of the axis of the valley portion 22 are located on the two side walls of the two connecting holes 36 close to each other, thereby reducing the risk of the solder paste on the mounting groove 13 moving out of the connecting hole 36.

[0049] The solder paste is applied to the plurality of fixing grooves. Then, the catalytic plate 2 and the mounting plate 11 are wound. The connecting piece 31 and the fixing portion 35 on the peak portion 21 pass through the solder paste on the fixing groove. The fixing portion 35 is positioned against the fixing groove, and the connecting piece 31 is positioned against the fixing groove. The peak portion 21 is close to the solder paste and presses the solder paste. The solder paste fills the connecting cavity 33 and the plurality of support cavities 34. The valley portion 22, the fixing groove, the connecting piece 31, and the fixing portion 35 are connected as one. The solder paste is also positioned against the fixing portion 35 to fixedly connect the plurality of peak portions 21 and the mounting plate 11. Thus, the connection strength of the catalytic plate 2 and the mounting plate 11 is greatly improved, and the service life of the catalytic converter is improved.

[0050] Referring toFigure 1 、 Figure 4 and Figure 5 The mounting plate 11 and the catalytic plate 2 are wound and inserted and mounted in the shell 1 to be positioned, the shell 1 is provided with a positioning assembly 4 for positioning both ends of the mounting plate 11, and the inside wall of the shell 1 is coaxially provided with a plurality of containing grooves 5; the mounting plate 11 and the catalytic plate 2 are wound and inserted and mounted in the shell 1 after the solder paste is applied in the containing grooves 5, the positioning assembly 4 positions both ends of the mounting plate 11, the solder paste adheres to the mounting plate 11 to be positioned, and the solder paste can enter the ventilation hole 12 located at the mounting plate 11 in contact with the solder paste, thereby further improving the stability of the mounting plate 11 after installation.

[0051] The shell 1 is further fixed with an arc-shaped fixed block 15, both ends of the fixed block 15 are flush with both ends of the shell 1, and the fixed block 15 is used to fill the arc-shaped gap formed after the mounting plate 11 and the catalytic plate 2 are wound, so as to position the mounting plate 11 and the catalytic plate 2.

[0052] The positioning assembly 4 comprises an arc-shaped strip 41 and a positioning ring 42, the arc-shaped strip 41 is fixedly installed on the inside wall of the shell 1, and the mounting plate 11 is provided with an arc-shaped groove 16 and a positioning groove 17 on the two opposite side walls, and one end of the shell 1 away from the arc-shaped strip 41 is coaxially provided with a clamping groove 18; the mounting plate 11 and the catalytic plate 2 are wound and inserted and mounted downward into the shell 1, so that the upper and lower side walls of the mounting plate 11 and the catalytic plate 2 are flush with both ends of the shell 1, the arc-shaped strip 41 is clamped and installed on the arc-shaped groove 16 to be positioned, and is used to block the mounting plate 11 from moving downward, then the solder paste is applied on the positioning ring 42, the positioning ring 42 is clamped and installed on the clamping groove 18, the solder paste fixes the positioning ring 42 on the shell 1, and the positioning ring 42 is clamped and installed on the positioning groove 17 to position the mounting plate 11 and the catalytic plate 2.

[0053] The working principle of the embodiment of the application is as follows:

[0054] The multiple installation grooves 13 are coated with solder paste, then the connecting pieces 31 and fixing parts 35 on the wave trough parts 22 are passed through the solder paste and abut against the installation grooves 13, the wave trough parts 22 extrude the solder paste to fill the connecting cavities 33 and supporting cavities, thereby fixing and connecting the multiple wave trough parts 22 and the installation plate 11, then the installation grooves are coated with solder paste, the catalytic plate 2 and the installation plate 11 are wound, so that the connecting pieces 31 and fixing parts 35 on the wave crest parts 21 are passed through the solder paste and abut against the installation grooves, the wave crest parts 21 extrude the solder paste to fill the connecting cavities 33 and supporting cavities, thereby fixing and connecting the multiple wave crest parts 21 and the installation plate 11, then the accommodating grooves 5 are coated with solder paste, then the installation plate 11 is inserted into the shell 1, so that the arc-shaped strips 41 are inserted into the arc-shaped grooves 16 for positioning, finally the positioning rings 42 are fixedly installed on the clamping grooves 18 and clamped on the positioning grooves 17 for positioning, thereby completing the installation of the catalytic converter, the wave crest parts 21 and the wave trough parts 22 cooperate with the installation plate 11 to form multiple air ducts 6, when the gas passes through the air ducts 6, the gas can be uniformly distributed through the ventilation holes 12, so that the gas pressure is balanced and the gas is uniformly mixed, thereby prolonging the service life of the catalytic converter and improving the gas catalysis effect.

[0055] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A tail gas catalytic converter, comprising a cylindrical shell (1), a mounting plate (11) arranged on the shell (1), and a catalytic plate (2) provided with a catalyst layer, the mounting plate (11) and the catalytic plate (2) being sequentially and alternately overlapped and wound along the axial direction of the shell (1) in parallel, the catalytic plate (2) comprising a plurality of wave crest portions (21) and a plurality of wave trough portions (22), characterized in that: The wave trough part (22) is arranged on the mounting plate (11) through the connecting assembly one (3) and is wound to make the wave crest part (21) connected with the mounting plate (11) through the connecting assembly two, so that the wave crest part (21) and the wave trough part (22) form the air duct (6) with the mounting plate (11), and the mounting plate (11) is provided with a plurality of ventilation holes (12) for gas passing and communicating with the air duct (6).

2. The exhaust gas catalytic converter according to claim 1, characterized in that: The aperture of the ventilation hole (12) is 2.2 mm, the center distance between two adjacent ventilation holes (12) is 3.0-3.4 mm, and the distance between two adjacent wave crest parts (21) is 3.1-3.2 mm.

3. The exhaust gas catalytic converter according to claim 1, characterized in that: The mounting plate (11) and the catalytic plate (2) are inserted and arranged in the shell (1) after winding, and a plurality of accommodating grooves (5) are formed in the inner side wall of the shell (1), the accommodating grooves (5) are coated with solder paste for fixing the mounting plate (11), and the solder paste enters the ventilation hole (12) to realize fixation.

4. The exhaust gas catalytic converter according to claim 1, characterized in that: A plurality of mounting grooves (13) corresponding to the wave trough part (22) are formed in the mounting plate (11), the connecting assembly one (3) comprises: Two groups of connecting plates (31) are arranged on the wave trough part (22) and located on both sides of the wave trough part (22) axis, the two groups of connecting plates (31) abut on the mounting groove (13), so that the wave trough part (22) is parallel to the mounting groove (13) and a connecting cavity (33) is formed therebetween, and each group of connecting plates (31) is spaced apart and arranged a plurality of times along the wave trough part (22) axis, and a support cavity (33) in communication with the connecting cavity (33) is formed between two adjacent connecting plates (31); A fixing layer (32) is formed by coating solder paste on the mounting groove (13), the connecting plate (31) passes through the fixing layer (32) and abuts on the mounting groove (13) to be positioned, the wave trough part (22) is close to and extrudes the solder paste and fills the solder paste in the connecting cavity (33) and the support cavity, and the wave trough part (22), the mounting groove (13) and the connecting plate (31) are connected as a whole.

5. The exhaust gas catalytic converter according to claim 4, characterized in that: The connecting plate (31) is formed by stamping the wave trough part (22), and the wave trough part (22) forms a connecting hole (36) communicating two air ducts (6).

6. The exhaust gas catalytic converter according to claim 4, characterized in that: The connecting plates (31) located on both sides of the wave trough part (22) axis are located on the opposite side walls of the two connecting holes (36).

7. The exhaust gas catalytic converter according to claim 6, characterized in that: A plurality of fixing grooves corresponding to the wave crest part (21) are arranged on the mounting plate (11) at intervals, the connecting assembly two is the same as the connecting assembly one (3), and the fixing grooves are fixedly connected with the wave crest part (21) through the solder paste.

8. The exhaust gas catalytic converter according to claim 4, characterized in that: The shell (1) is provided with a positioning assembly (4) for positioning both ends of the mounting plate (11), and the positioning assembly (4) comprises:

9. The catalytic converter of claim 1, wherein: An arc-shaped strip (41) is arranged on the shell (1), and an arc-shaped groove (16) is formed in the mounting plate (11) and matched with the arc-shaped strip (41); ​ A positioning ring (42) is detachably arranged on the shell (1) and abuts against the mounting plate (11) on the side away from the arc-shaped strip (41) for positioning.

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