Tail gas catalytic converter

Abstract

The invention 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 present application relates to the technical field of exhaust gas treatment, and in particular to an exhaust gas catalyst. Background Art

[0002] The exhaust gas emitted by motor vehicles is mixed with many harmful pollutants, such as carbon monoxide (CO), sulfur dioxide (SO2), hydrocarbons (HC), nitrogen oxides (NOx) and other harmful gases. When these harmful gases work together with particulate matter in the atmosphere to form aerosols, they will be suspended in the atmosphere for a long time and in the respiratory zone of people, which will pose a serious threat to human survival and the growth of animals and plants. Therefore, in order to protect the environment, a gasoline engine exhaust catalyst is needed.

[0003] In the prior art, the present application with reference to application publication number CN112922698A relates to an exhaust gas catalyst and a production process using the catalyst, comprising a cylindrical shell, a mounting plate being arranged on the shell, a corrugated catalytic plate being arranged on the mounting plate, the catalytic plate being provided with a catalyst layer, the mounting plate and the catalytic plate being overlapped and wound in parallel in sequence along the axis direction of the shell, and an air duct is formed between the catalytic plate and the shell.

[0004] The trough portion is connected to the mounting plate. After the catalytic plate and the mounting plate are wound, the peak portion rests on the mounting plate to form a plurality of air ducts. The gas moves through the air ducts. When the gas moves, a greater pressure is exerted on the mounting plate and the catalytic plate. At the same time, the connection between the trough portion and the mounting plate is only connected, so 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 catalyst, increasing the risk of damage to the catalyst, and reducing the life of the catalyst. Summary of the invention

[0005] In order to increase the life of the catalyst, the present application provides an exhaust gas catalyst.

[0006] The present application provides an exhaust gas catalyst, which adopts the following technical solution: An exhaust catalyst comprises a cylindrical shell, a mounting plate and a catalytic plate arranged on the shell, a catalyst layer being arranged on the catalytic plate, and the mounting plate and the catalytic plate are successively and parallelly overlapped and wound along the axis direction of the shell, the catalytic plate comprises a plurality of wave crests and a plurality of wave troughs, the wave troughs are arranged on the mounting plate through a connecting component 1 and are connected to the mounting plate through a connecting component 2 after winding, so that an air duct is formed between the wave crests and the wave troughs and the mounting plate, and a plurality of ventilation holes for gas to pass through and connected to the air duct are provided on the mounting plate.

[0007] By adopting the above technical solution, during installation, the multiple troughs are first fixedly mounted on the mounting plate through the connecting component 1, and then after the mounting plate and the catalytic plate are wound, the peaks are also connected to the mounting plate through the connecting component 2, so that the multiple troughs and the multiple peaks are fixedly connected to the mounting plate, thereby greatly improving the connection strength between the catalytic plate and the mounting plate, improving the durability of the catalyst, reducing the risk of damage to the catalyst, and increasing the life of the catalyst.

[0008] At the same time, multiple air ducts are interconnected through ventilation holes. When there is a deviation in wind pressure between two adjacent air ducts, the gas can move between the two adjacent air ducts through the ventilation holes, making the gas distribution more uniform and reducing the risk of excessive local air pressure on the catalytic plate and the mounting plate. Therefore, the durability of the catalyst is further improved and the risk of damage to the catalyst is reduced. The ventilation hole design also increases the probability of gas turbulence and improves the catalytic effect of the catalyst, thereby improving both the life and catalytic effect of the catalyst.

[0009] Optionally, the aperture of the ventilation hole is 2.2 mm, the center distance between two adjacent ventilation holes is 3.0-3.4 mm, and the distance between two adjacent peaks is 3.1-3.2 mm.

[0010] By adopting the above technical scheme, the aperture and arrangement density of the ventilation holes are closely related to the strength and ventilation effect of the mounting plate. Increasing the aperture and arrangement density of the ventilation holes can improve the ventilation effect, but the strength of the mounting plate and the catalytic plate will be greatly reduced. Conversely, reducing the aperture and arrangement density of the ventilation holes can improve the strength of the mounting plate and the catalytic plate, but the ventilation effect will be reduced. Therefore, the aperture and arrangement density of the ventilation holes are reasonably designed, and the arrangement distance of the ventilation holes is close to the distance between the two peaks, so that the design of the ventilation holes can cooperate with the peaks and troughs, so as to simultaneously improve the strength and ventilation effect of the catalyst, thereby increasing the life of the catalyst.

[0011] Optionally, the mounting plate and the catalytic plate are wound and plugged into the shell for positioning, and a plurality of receiving grooves are provided on the inner wall of the shell. Solder paste for fixing the mounting plate is smeared on the receiving grooves, and the solder paste is allowed to enter the ventilation holes for fixation.

[0012] By adopting the above technical solution, the solder paste is applied to a plurality of receiving grooves, and then the mounting plate and the catalyst plate are wound and plugged into the shell for installation. The shell and the solder paste cooperate to position the wound mounting plate and the catalyst plate, and the solder paste can also enter the ventilation holes during the installation process. The ventilation holes for the solder paste to enter are originally blocked by the shell and cannot achieve ventilation effect, and the solder paste that enters can further improve the fixing effect of the mounting plate. The ventilation holes can achieve ventilation and allow solder paste to enter for fixing at the same time. The above two effects can both increase the life of the catalyst.

[0013] Optionally, the mounting plate is provided with a plurality of mounting grooves corresponding to the troughs, and the first connecting component comprises: Two groups of connecting pieces are arranged on the trough part and located on both sides of the axis of the trough part. The two groups of connecting pieces abut against the mounting groove and make the trough part parallel to the mounting groove and form a connecting cavity between the two. Each group of connecting pieces is provided with a plurality of connecting pieces at intervals along the axis of the trough part and a supporting cavity communicating with the connecting cavity is formed between two adjacent connecting pieces. The fixing layer is formed by applying solder paste on the mounting groove, and the connecting piece passes through the fixing layer and abuts against the mounting groove for positioning. The trough portion approaches and squeezes the solder paste so that the solder paste fills the connecting cavity and the supporting cavity, and at the same time, the trough portion, the mounting groove, and the connecting piece are connected as a whole.

[0014] By adopting the above technical solution, the solder paste is applied to the mounting groove, and then the two groups of connecting pieces on the trough part are passed through the solder paste and pressed against the mounting groove, and the trough part is close to and squeezes the solder paste, a connecting cavity is formed between the trough part and the mounting groove, and a supporting cavity is formed between two adjacent connecting pieces, and the solder paste is squeezed to fill the connecting cavity and the supporting cavity to form a fixed layer, and the trough part, the mounting groove, the connecting piece and the mounting plate are connected as a whole, and at the same time, the connecting piece is buried in the solder paste, and the mounting groove is parallel to the trough part, so that the thickness of the fixed layer is uniform, thereby saving solder paste while also improving the fixing effect, thereby further improving the life of the catalyst.

[0015] Optionally, a fixing portion that fits into the mounting groove is formed on the connecting sheet, and the fixing layer is pressed against the fixing portion for positioning.

[0016] By adopting the above technical solution, the connecting piece drives the fixing part to pass through the solder paste, so that the fixing part is fitted on the mounting groove for positioning. Therefore, the solder paste is squeezed and fills the connecting cavity, so that the solder paste is pressed on the fixing part, and the fixing part is buried in the solder paste. When the connecting piece is away from the mounting groove, the solder paste is pressed on the fixing part for positioning, thereby greatly improving the connection strength between the catalyst plate and the mounting plate and improving the life of the catalyst.

[0017] Optionally, the connecting piece is formed by punching the trough portion so that the trough portion forms a connecting hole connecting the two air ducts.

[0018] By adopting the above technical solution, the convenience and firmness of the connection plate setting are improved, and the generated connection hole connects the two air ducts, allowing the gas to move through the two connection holes, further reducing the risk of excessive local air pressure, thereby further improving the life of the catalyst.

[0019] Optionally, the connecting pieces located on both axes of the trough portion are located on the side walls at opposite ends of the two connecting holes.

[0020] By adopting the above technical solution, the overlapping area between the fixing layer and the two connecting holes is reduced, thereby reducing the risk of the solder paste moving out through the connecting holes. At the same time, the solder paste entering the connecting holes can also achieve a fixing effect, further enhancing the connection strength and increasing the life of the catalyst.

[0021] Optionally, a plurality of fixing grooves corresponding to the crest parts are arranged at intervals on the mounting plate, the connection component 2 has the same structure as the connection component 1, and the fixing grooves are fixedly connected to the crest parts by solder paste.

[0022] By adopting the above technical solution, a plurality of troughs are first fixedly connected to the mounting plate through connecting component 1, and then solder paste is applied to a plurality of fixing grooves, and the catalyst plate and the mounting plate are wound, so that a plurality of connecting components 2 on the crests are sequentially inserted into a plurality of solder pastes and positioned against the fixing grooves until the winding is completed, so that the solder paste can also fix the crests to the mounting plate, so that both the troughs and the crests are connected to the mounting plate, thereby greatly improving the life of the catalyst.

[0023] Optionally, the housing is provided with a positioning assembly for positioning both ends of the mounting plate, and the positioning assembly includes: The arc strip is arranged on the housing, and the mounting plate is provided with an arc groove which is engaged with the arc strip; The positioning ring is detachably arranged on the shell and pressed against the side of the mounting plate away from the arc strip for positioning.

[0024] By adopting the above technical solution, the catalytic plate and the mounting plate are wound and plugged into the shell, so that the arc strip is clipped into the arc groove for positioning, and then the positioning ring is fixedly installed on the shell, and the positioning ring is against the mounting plate for positioning, thereby further improving the stability of the catalytic plate and the mounting plate after installation and increasing the life of the catalyst.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The trough portion is fixedly mounted on the mounting plate through connecting component 1, and then the crest portion is connected to the mounting plate through connecting component 2, so that multiple trough portions and multiple crest portions are fixedly connected to the mounting plate, thereby greatly improving the connection strength between the catalytic plate and the mounting plate, improving the durability of the catalyst, reducing the risk of catalyst damage, and increasing the life of the catalyst.

[0026] 2. Multiple air ducts are interconnected through ventilation holes. When there is a deviation in wind pressure between two adjacent air ducts, the gas can move between the two adjacent air ducts through the ventilation holes, making the gas distribution more uniform and reducing the risk of excessive local air pressure on the catalyst plate and the mounting plate. Therefore, the durability of the catalyst is further improved and the risk of damage to the catalyst is reduced. In addition, the ventilation hole design also increases the probability of gas turbulence and improves the catalytic effect of the catalyst, thereby improving the life and catalytic effect of the catalyst at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the exhaust catalyst; Figure 2 It is a schematic diagram of the structure after the trough part is connected to the mounting plate; Figure 3 is a schematic diagram of the cross section of the trough and the mounting plate, mainly showing the connection component one; Figure 4 It is a partial structural exploded view of the exhaust catalyst, mainly showing the positioning components; Figure 5 It is a schematic diagram of the structure of the mounting plate, omitting the ventilation holes.

[0028] Figure numerals: 1. Shell; 11. Mounting plate; 12. Ventilation hole; 13. Mounting groove; 15. Fixing block; 16. Arc groove; 17. Positioning groove; 18. Snap-in groove; 2. Catalytic plate; 21. Peak portion; 22. Valley portion; 3. Connecting component 1; 31. Connecting sheet; 32. Fixing layer; 33. Connecting cavity; 35. Fixing portion; 36. Connecting hole; 4. Positioning component; 41. Arc strip; 42. Positioning ring; 5. Receiving groove; 6. Air duct. DETAILED DESCRIPTION

[0029] The present application is described in further detail below.

[0030] The embodiment of the present application discloses an exhaust gas catalyst.

[0031] Reference Figure 1-Figure 3 The exhaust gas catalyst comprises a cylindrical shell 1, a mounting plate 11 and a catalytic plate 2 arranged on the shell 1, and the catalytic plate 2, the two opposite side walls of the catalytic plate 2 with the largest area are coated with a catalyst layer, the mounting plate 11 and the catalytic plate 2 are successively parallel and overlapped and wound along the axis direction of the shell 1, so that the mounting plate 11 and the catalytic plate 2 are spiral; the catalytic plate 2 comprises a plurality of peaks 21 and a plurality of troughs 22, the troughs 22 are arranged on the mounting plate 11 through a connecting component 1 3 and after winding, the peaks 21 are connected to the mounting plate 11 through a connecting component 2, so that air ducts 6 are formed between the peaks 21 and the troughs 22 and the mounting plate 11, and a plurality of ventilation holes 12 for gas to pass through and connected to the air ducts 6 are opened on the mounting plate 11.

[0032] The catalytic plate 2 and the mounting plate 11 have the same width and the corresponding side walls are flush when they are connected to each other. A plurality of ventilation holes 12 are arranged in intervals along the length direction of the mounting plate 11, and the plurality of ventilation holes 12 are arranged in one-to-one correspondence with the plurality of air ducts 6. A plurality of ventilation holes 12 are arranged in each group in the width direction of the mounting plate 11. The aperture of the ventilation holes 12 is 2.2 mm, and the center distance between two adjacent ventilation holes 12 is 3.0-3.4 mm, which may be 3.0, 3.1 mm, 3.2 mm, 3.3 mm, or 3.4 mm. The distance between two adjacent wave peaks 21 is 3.1-3.2 mm, which may be 3.1 mm or 3.2 mm. It is best when the center distance between two adjacent wave peaks 21 and two adjacent ventilation holes 12 is the same.

[0033] The mounting plate 11 has mounting grooves 13 and fixing grooves on its opposite side walls. The mounting grooves 13 and fixing grooves penetrate the mounting plate 11 along the width direction of the mounting plate 11. Both the mounting grooves 13 and fixing grooves are arc-shaped and multiple mounting grooves are provided along the length direction of the mounting plate 11 and are staggered with each other. The axes of the crest portion 21 and the trough portion 22 are parallel to the width direction of the mounting plate 11.

[0034] There are multiple connection components 1 3, and each installation groove 13 is provided with a connection component 1 3, the connection component 1 3 is arranged on the trough portion 22 and connected to the installation groove 13, there are multiple connection components 2, and each fixing groove is provided with a connection component 2, the connection component 2 is arranged on the peak portion 21 and connected to the fixing groove, the connection component 2 has the same structure as the connection component 1 3, and the following is explained by taking the connection component 1 3 as an example.

[0035] The connecting component 3 includes two groups of connecting pieces 31 and a fixing layer 32. The two groups of connecting pieces 31 are located on both sides of the axis of the trough portion 22 and are arranged in a mirror-symmetrical manner about the axis of the trough portion 22. Each group of connecting pieces 31 is arranged in plurality along the axis of the trough portion 22, and the two groups of connecting pieces 31 are positioned against the mounting groove 13 so that the trough portion 22 is parallel to the mounting groove 13, so that a connecting cavity 33 is formed between the trough portion 22 and the mounting groove 13, and a supporting cavity connected to the connecting cavity 33 is formed between two adjacent connecting pieces 31 located on the same side of the axis of the trough portion 22; and when the connecting piece 31 located on the crest portion 21 is against the mounting groove 13, the crest portion 21 is parallel to the fixing groove.

[0036] A fixing portion 35 that fits on the mounting groove 13 is integrally provided at one end of the connecting piece 31 away from the trough portion 22, and two fixing portions 35 located on both sides of the axis of the trough portion 22 are located on opposite ends of the two connecting pieces 31; the connecting piece 31 and the fixing portion 35 are both formed by stamping the trough portion 22, and after stamping, a connecting hole 36 is formed on the trough portion 22, and the connecting hole 36 connects two adjacent air ducts 6.

[0037] The fixing layer 32 is formed by applying solder paste on the mounting groove 13, applying solder paste on the mounting groove 13, passing the fixing part 35 and the connecting piece 31 through the solder paste, the fixing part 35 is tightly attached to the mounting groove 13 and the connecting piece 31 is pressed against the mounting groove 13 for positioning, and the trough part 22 is close to the solder paste and squeezes the solder paste so that the solder paste fills the connecting cavity 33 and multiple supporting cavities, so that the trough part 22, the mounting groove 13, the connecting piece 31 and the fixing part 35 are connected as a whole, and the solder paste is also pressed against the fixing part 35 for positioning, so as to prevent the trough part 22 from detaching from the mounting groove 13, thereby fixing the multiple trough parts 22 to the mounting plate 11.

[0038] At the same time, the two connecting pieces 31 located on both sides of the axis of the trough 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 holes 36 .

[0039] Solder paste is applied on a plurality of fixing grooves, and then the catalyst plate 2 and the mounting plate 11 are wound so that the connecting piece 31 and the fixing part 35 on the crest part 21 pass through the solder paste on the fixing groove, so that the fixing part 35 is tightly attached to the fixing groove and the connecting piece 31 is pressed against the fixing groove for positioning, and the crest part 21 is close to the solder paste and squeezes the solder paste so that the solder paste fills the connecting cavity 33 and a plurality of supporting cavities, so that the trough part 22, the fixing groove, the connecting piece 31 and the fixing part 35 are connected as a whole, and the solder paste is also pressed against the fixing part 35 for positioning, so that the plurality of crest parts 21 are fixedly connected to the mounting plate 11, thereby greatly improving the connection strength between the catalyst plate 2 and the mounting plate 11 and improving the life of the catalyst.

[0040] Reference Figure 1 , Figure 4 and Figure 5 The mounting plate 11 and the catalytic plate 2 are wound and plugged into the shell 1 for positioning, and the shell 1 is provided with a positioning component 4 for positioning the two ends of the mounting plate 11; the inner wall of the shell 1 is coaxially provided with a receiving groove 5, and a plurality of receiving grooves 5 are arranged at intervals along the axis of the shell 1; first, solder paste is applied to the receiving groove 5, and then the mounting plate 11 and the catalytic plate 2 are wound and plugged into the shell 1, and the positioning component 4 positions the two ends of the mounting plate 11, and at the same time, the solder paste adheres to the mounting plate 11 for positioning, and allows the solder paste to enter the ventilation hole 12 located on the mounting plate 11 in contact with the solder paste, further improving the stability of the mounting plate 11 after installation.

[0041] An arc-shaped fixing block 15 is also fixed in the shell 1, and both ends of the fixing block 15 are flush with both ends of the shell 1. The fixing 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.

[0042] The positioning assembly 4 includes an arc strip 41 and a positioning ring 42. The arc strip 41 is fixedly mounted on the inner wall of the shell 1. At the same time, an arc groove 16 and a positioning groove 17 are provided on the opposite side walls of the mounting plate 11. A snap-in groove 18 is coaxially provided at one end of the shell 1 away from the arc strip 41. The mounting plate 11 and the catalytic plate 2 are wound and inserted downwardly into the shell 1, so that the upper and lower side walls of the mounting plate 11 and the catalytic plate 2 are respectively flush with the two ends of the shell 1. The arc strip 41 is snap-fitted and mounted on the arc groove 16 for positioning, and is used to prevent the mounting plate 11 from moving further downward. Then, solder paste is applied to the positioning ring 42, and the positioning ring 42 is snap-fitted and mounted on the snap-fitting groove 18. The solder paste fixes the positioning ring 42 on the shell 1, and the positioning ring 42 is snap-fitted and mounted on the positioning groove 17 to position the mounting plate 11 and the catalytic plate 2.

[0043] The working principle of the embodiment of the present application is as follows: Solder paste is applied to the multiple mounting grooves 13, and then the connecting piece 31 and the fixing part 35 on the trough part 22 are passed through the solder paste and pressed against the mounting groove 13, and the trough part 22 squeezes the solder paste to fill the connecting cavity 33 and the supporting cavity, so as to fix the multiple trough parts 22 and the mounting plate 11 together, and then solder paste is applied to the fixing groove, and the catalytic plate 2 and the mounting plate 11 are wound, so that the connecting piece 31 and the fixing part 35 on the crest part 21 are passed through the solder paste and pressed against the fixing groove, and the crest part 21 squeezes the solder paste to fill the connecting cavity 33 and the supporting cavity, so as to fix the multiple crest parts 21 and the mounting plate 11 together. The connection is fixed, and then solder paste is applied in the receiving groove 5. Then the mounting plate 11 is plugged and installed in the shell 1, so that the arc strip 41 is plugged and installed on the arc groove 16 for positioning. Finally, the positioning ring 42 is fixedly installed on the snap-in groove 18, and the positioning ring 42 is snap-fitted and installed on the positioning groove 17 for positioning, thereby completing the installation of the catalyst. The peak portion 21 and the trough portion 22 cooperate with the mounting plate 11 to form a plurality of air ducts 6. When the gas passes through the air duct 6, it can be evenly pressurized through the ventilation hole 12, so that the gas pressure is balanced and the gas is evenly mixed, thereby improving the life of the catalyst and the gas catalytic effect.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An exhaust gas catalyst, comprising a cylindrical shell (1), a mounting plate (11) arranged on the shell (1) and a catalyst plate (2), wherein a catalyst layer is arranged on the catalyst plate (2), wherein the mounting plate (11) and the catalyst plate (2) are sequentially stacked and wound in parallel along the axis direction of the shell (1), wherein the catalyst plate (2) comprises a plurality of wave crests (21) and a plurality of wave troughs (22), and wherein: The trough portion (22) is arranged on the mounting plate (11) via a connecting component 1 (3) and after winding, the crest portion (21) is connected to the mounting plate (11) via a connecting component 2, so that an air duct (6) is formed between the crest portion (21) and the trough portion (22) and the mounting plate (11), and a plurality of ventilation holes (12) for air to pass through and in communication with the air duct (6) are initially provided on the mounting plate (11).

2. An exhaust gas catalyst according to claim 1, characterized in that: The diameter of the ventilation holes (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 crests (21) is 3.1-3.2 mm.

3. The exhaust gas catalyst according to claim 1, characterized in that: The mounting plate (11) and the catalytic plate (2) are wound and inserted into the housing (1) for positioning. A plurality of receiving grooves (5) are provided on the inner wall of the housing (1). Solder paste for fixing the mounting plate (11) is applied to the receiving grooves (5) and allows the solder paste to enter the ventilation holes (12) for fixing.

4. The exhaust gas catalyst according to claim 1, characterized in that: The mounting plate (11) is provided with a plurality of mounting grooves (13) corresponding to the trough portions (22), and the connection assembly 1 (3) comprises: Two groups of connecting pieces (31) are arranged on the trough portion (22) and located on both sides of the axis of the trough portion (22). The two groups of connecting pieces (31) abut against the mounting groove (13) and make the trough portion (22) parallel to the mounting groove (13) and form a connecting cavity (33) therebetween. Each group of connecting pieces (31) is provided with a plurality of support cavities communicating with the connecting cavity (33) at intervals along the axis of the trough portion (22). Two adjacent connecting pieces (31) form support cavities; The fixing layer (32) is formed by applying solder paste to the mounting groove (13); the connecting piece (31) passes through the fixing layer (32) and abuts against the mounting groove (13) for positioning; the trough portion (22) approaches and squeezes the solder paste so that the solder paste fills the connecting cavity (33) and the supporting cavity, and at the same time, the trough portion (22), the mounting groove (13), and the connecting piece (31) are connected as a whole.

5. An exhaust gas catalyst according to claim 4, characterized in that: A fixing portion (35) that fits the mounting groove (13) is formed on the connecting piece (31), and the fixing layer (32) is pressed against the fixing portion (35) for positioning.

6. An exhaust gas catalyst according to claim 4, characterized in that: The connecting piece (31) is formed by punching the trough portion (22), so that the trough portion (22) forms a connecting hole (36) that connects the two air ducts (6).

7. An exhaust gas catalyst according to claim 6, characterized in that: The connecting pieces (31) located on both axes of the trough portion (22) are located on the side walls at opposite ends of the two connecting holes (36).

8. The exhaust gas catalyst according to claim 4, characterized in that: A plurality of fixing grooves corresponding to the crest portion (21) are arranged at intervals on the mounting plate (11); the second connection component has the same structure as the first connection component (3); and the fixing grooves are fixedly connected to the crest portion (21) by solder paste.

9. The exhaust gas catalyst according to claim 1, characterized in that: The housing (1) is provided with a positioning assembly (4) for positioning the two ends of the mounting plate (11), and the positioning assembly (4) comprises: An arc-shaped strip (41) is arranged on the housing (1), and an arc-shaped groove (16) is provided on the mounting plate (11) for engaging with the arc-shaped strip (41); The positioning ring (42) is detachably arranged on the housing (1) and is pressed against a side of the mounting plate (11) away from the arc-shaped strip (41) for positioning.

Images