High-temperature-resistant self-cooling automobile three-way catalyst

Abstract

The high-temperature-resistant self-cooling automobile three-way catalyst comprises a shell and a carrier arranged in the shell, the middle section of the shell is of an inner-outer double-layer structure, a cavity in the double-layer structure is used for introducing fluid and cooling the whole shell and the carrier, and the fluid is introduced or discharged through a supply mechanism. According to the high-temperature-resistant self-cooling automobile three-way catalytic converter, a self-cooling structure is redesigned, space occupation is greatly reduced, the cooling effect is improved, a corresponding anti-blocking cleaning scheme is arranged in the catalytic converter, the overall service life of the three-way catalytic converter can be remarkably prolonged, the structural design that a cavity is matched with an elastic piece is adopted, and the service life of the three-way catalytic converter is prolonged. On one hand, the carrier can stably move after being impacted by waste gas by utilizing the connection of the elastic piece and the carrier, and a space can be provided for thermal expansion and cold contraction of the carrier, so that the negative pressure effect generated in the moving process of the plate body effectively self-cools the catalytic converter under different working conditions.

Description

TECHNICAL FIELD

[0001] The application relates to the field of air pollution control, in particular to a high-temperature-resistant self-cooling automobile three-way catalyst. BACKGROUND

[0002] The three-way catalyst refers to the use of noble metals in the exhaust emission path of a vehicle to purify exhaust gas, and the noble metals exist in the carrier of the catalyst, which produces a catalytic reaction by contacting the exhaust gas at high temperature and purifies the exhaust gas. For example, the existing technology with the publication number CN219412707U discloses a universal three-way catalyst, which comprises an air inlet pipe and a thread, the outer wall of the thread is connected with a mounting structure, the rear end surface of the air inlet pipe is communicated with a three-way catalyst, the outer wall bottom of the three-way catalyst is respectively fixedly connected with square frames, the inner wall of the square frame is connected with a fixing structure, the straight pipe in the mounting structure is rotated forward on the outer wall of the thread, so that the straight pipe is separated from the air inlet pipe, then the first connecting plate and the second connecting plate are adjusted, then the straight pipe is gradually connected with the thread in a threaded manner, so that the mounting structure and the air inlet pipe are installed, then the front end of the air inlet pipe is inserted into the tail of the vehicle, and the second connecting plate is attached to the tail of the vehicle, then the external bolts are screwed into the tail of the vehicle in a threaded manner, the universality of the three-way catalyst is improved, and the use limitation of the three-way catalyst is eliminated.

[0003] For example, the existing technology with the publication number CN219509702U discloses a three-way catalyst for preventing overheating, which comprises a first box body and a metal sealing ring, a protection device is installed on the upper right side of the first box body, and a cooling device is installed on the left side of the protection device. The water pump can be started to suck water in the second pipeline, and then the water is discharged into the second box body through the first pipeline to form a circulation. The circulating water and the heat-conducting layer can uniformly cool the three-way catalyst body, avoid local high temperature of the three-way catalyst body, and further improve the cooling efficiency of the three-way catalyst body by starting the motor to drive the fan blades to rotate, accelerating the air flow, and cooperating with the water circulation in the second pipeline. The service life of the three-way catalyst body is prolonged.

[0004] The above-mentioned existing technology has good practical significance and makes significant improvement in the installation and cooling improvement of the three-way catalyst, but still has certain defects. The three-way catalyst needs to be installed below the heat insulation tile of the chassis, and the three-way catalyst needs to be directly cooled by the existing technology without any shielding below, which will limit the installation space of the chassis and the cost of redesigning the chassis will completely cover the improvement effect of the three-way catalyst. SUMMARY

[0005] The automobile three-way catalyst of the present application is capable of resisting high temperature and self-cooling, and can solve the problem that the three-way catalyst needs to be installed below the heat insulation tile of the chassis in the background art, and the direct use of the cooling scheme in the prior art will cause the installation space of the chassis to be limited and the cost of redesigning the chassis to completely cover the improvement effect of the three-way catalyst.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an automobile three-way catalyst capable of resisting high temperature and self-cooling, comprising a shell and a carrier arranged in the shell, the middle section of the shell is a double-layer structure, wherein the cavity in the double-layer structure is used for introducing fluid and cooling the whole shell and the carrier, and the fluid is introduced or discharged through a supply mechanism.

[0007] As a preferred, the supply mechanism comprises a pipeline in communication with the cavity, and the pipeline is in communication with an external mechanism or an internal mechanism, both of which are used for guiding the fluid.

[0008] As a preferred, the pipeline is connected with the external mechanism, and the external mechanism comprises an external fan or a fan mechanism for generating airflow through exhaust gas discharge.

[0009] As a preferred, the pipeline is connected with the internal mechanism, and the internal mechanism comprises a plate body slidingly arranged in the cavity, the plate body is connected with a moving mechanism, and the movement of the plate body is used to change the air pressure of the directly connected area of the pipeline and the cavity and realize the fluid transportation.

[0010] As a preferred, the moving mechanism comprises an elastic member sealingly and fixedly connected with the outer surface of the carrier, the elastic member is sealingly arranged in the inner ring gap of the cavity, and the elastic member is deformed and synchronously moved by the tail gas pushing the carrier.

[0011] As a preferred, the outer surface of the elastic member is further connected with a strip rod for supporting the inner surface of the outer wall of the shell, and the strip rod is connected with the plate body.

[0012] As a preferred, the elastic body is a high-temperature-resistant rubber or corrugated metal.

[0013] As a preferred, the impact surface of the carrier and the exhaust gas is further provided with a scale cleaning mechanism, and the back surface of the carrier is provided with an elastic body for driving the carrier to move back.

[0014] As a preferred, the cleaning mechanism comprises a metal sheet fixed to the inner surface of the inner wall of the shell, the metal sheet is a double-path memory alloy, the initial state of the metal sheet is a right angle, and the metal sheet will be deformed and attached to the device after high temperature, and the rough surface of the metal sheet is arranged to attach the exhaust gas impact surface of the carrier.

[0015] As preferred, the tail end of the metal sheet is a bending part, used for guiding deformation caused by the impact of the carrier which is moved back in the state of being flatly attached to the inner wall of the shell.

[0016] Compared with the prior art, the high-temperature-resistant self-cooling automobile three-way catalyst has the advantages that the self-cooling structure is redesigned, the space occupation is greatly reduced, the cooling effect is improved, the corresponding anti-blocking cleaning scheme is arranged in the catalyst, and the overall service life of the three-way catalyst is significantly improved, as shown in the following content.

[0017] 1. The structure design of the cavity matched with the elastic member can utilize the connection of the elastic member and the carrier to enable the carrier to stably move after being impacted by exhaust gas, and can provide space for thermal expansion and cold contraction of the carrier, and on the other hand, the movement of the elastic member and the deformation of the elastic member can pull the plate body to move, so that the negative pressure effect generated in the movement of the plate body and the effective self-cooling of the catalyst under different working conditions are realized.

[0018] More specifically, as shown in the following content, during the movement of the plate body, the left and right sides of the plate body will be in different pressure states, and accordingly, during the starting and stopping of the engine, the right side of the plate body and the left side of the cavity will be in a negative pressure state, so that negative pressure drainage cooling effect can be automatically generated under different conditions, and the space occupation is smaller.

[0019] 2. The use of the elastic body can further improve the movement stability of the carrier, and on the other hand, can ensure that the carrier can smoothly move back after the engine is stopped, and generate sufficient thrust to deform the metal sheet, and then utilize the frictional contact between the rough surface of the metal sheet and the working surface of the carrier to generate a cleaning effect, thereby significantly improving the service life of the carrier and reducing the frequency of disassembly and cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment one of the present application; Figure 2 It is a schematic diagram of the pipeline distribution structure of the present application; Figure 3 It is a schematic diagram of the cavity structure of the present application; Figure 4 It is a schematic diagram of the elastic member structure of the present application; Figure 5 It is a schematic diagram of the cavity structure of the embodiment two of the present application; Figure 6 It is a schematic diagram of the carrier structure of the embodiment three of the present application; Figure 7 It is a schematic diagram of the metal sheet structure of the present application; Figure 8 It is a schematic diagram of the structure of the metal sheet before deformation of the present application; Figure 9 Figure is a schematic diagram of the elastic body distribution structure of the present application.

[0021] In the figure: 1, shell; 2, carrier; 3, cavity; 4, pipeline; 5, elastic member; 6, strip; 7, plate body; 8, metal sheet; 9, rough surface; 10, bending part; 11, elastic body. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0023] Please refer to Figures 1-9 The present application provides the following technical solutions: Embodiment one: The scheme disclosed in this embodiment is to solve the problems existing in the prior art, such as Figures 1-3 As shown, it comprises a shell 1 and a carrier 2 arranged in the shell 1. The middle section of the shell 1 is a double-layer structure. The cavity 3 in the double-layer structure is used to pass in fluid and cool the whole shell 1 and the carrier 2. The fluid is passed in or out through a supply mechanism. The supply mechanism comprises a pipeline 4 connected with the cavity 3. The pipeline 4 is connected with an external mechanism or an internal mechanism for guiding fluid. The pipeline 4 is connected with the external mechanism. The external mechanism comprises an external fan or a fan blade mechanism for generating airflow through exhaust gas discharge. When the catalyst works, the exhaust gas enters the shell 1 through the direction of the dashed arrow shown in the figure. After the exhaust gas reacts with the noble metal in the carrier 2 in a high-temperature environment, the exhaust gas is correspondingly purified and discharged. In order to avoid the high temperature of the exhaust gas caused by incomplete combustion of the oil injection in the engine from causing the catalyst to be seriously aged, the corresponding external mechanism is arranged to pass in gas or liquid and other fluids into the cavity 3 through the pipeline 4 for cooling the catalyst. The external mechanism can be a fan or a gas pump mechanism installed in the vehicle, or a paddle mechanism integrated in the rear end of the exhaust gas discharge pipeline. The paddle is used to rotate under the drive of the exhaust gas in the rear section and drive the fan blades outside the exhaust gas pipeline to generate airflow.

[0024] Embodiment two: The alternative scheme of the above technical solution is disclosed in this embodiment. Mainly because the automobile chassis design is very mature, and the space application of each part is very compact. The additional occupation of external space for air supply will cause the corresponding cost to increase. Therefore, as Figures 4-5As shown, the pipeline 4 is connected with the built-in mechanism, wherein the built-in mechanism comprises a plate body 7 slidingly installed in the cavity 3, wherein the plate body 7 is connected with the moving mechanism, and the movement of the plate body 7 is used to change the air pressure of the area directly connected with the cavity 3 of the pipeline 4 and realize fluid transportation, and the moving mechanism comprises an elastic member 5 sealingly and fixedly connected with the outer surface of the carrier 2, wherein the elastic member 5 is sealingly installed in the annular gap in the inner wall of the cavity 3, and is synchronously moved by the deformation of the elastic member 5 driven by the exhaust gas pushing the carrier 2, and the outer surface of the elastic member 5 is further connected with a strip 6 used to support the inner surface of the outer layer wall of the shell 1, and the strip 6 is used to be connected with the plate body 7, and the elastic member is high-temperature-resistant rubber or corrugated metal. Under the impact of the exhaust gas, the carrier 2 will move correspondingly in the inside of the shell 1, at the same time, the elastic member 5 will be synchronously driven and deformed, and the elastic member 5 can be a high-temperature-resistant EPDM rubber member or a high-temperature-resistant elastic metal material. If metal material is used, the elastic member 5 needs to be corrugated. Regardless of the material, the use of the elastic member 5 not only can drive the carrier 2 to move and rebound, but also can adapt to the thermal expansion and contraction of the catalytic converter to some extent, thereby improving the service life. When the elastic member 5 deforms and moves, the plate body 7 in the cavity 3 will also move synchronously, so that the internal space of the cavity 3 on one side or both sides of the plate body 7 will change in pressure, thereby generating fluid transportation effect and realizing the auxiliary self-cooling function. In this case, the length of the pipeline 4 can be reduced, and the space occupied by the matched electronic control fluid equipment can be avoided. Taking the left space of the plate body 7 as an example, during the process that the plate body 7 slides to the left and returns to the original position and moves to the right, the pipeline 4 will be in a negative pressure state and suck external fluid such as gas into the cavity 3, thereby self-cooling the three-way catalytic converter of the vehicle after the engine is extinguished. The right space of the plate body 7 is the same as the left space, and is used for high-temperature self-cooling of the engine fuel combustion after starting and high-temperature self-cooling after long-time operation, respectively. The application range is wider, and the service life of the three-way catalytic converter can be more significantly improved in the working condition that needs to be frequently started and stopped. Only the pipeline 4 is connected with the cavity 3 on both sides.

[0025] Embodiment three: in an ideal state, the three-way catalytic converter can catalyze and purify the exhaust gas generated by the fully combusted fuel at a very high efficiency. However, the fact is that the engine thermal efficiency is not high and the engine working condition cannot reach the ideal state, which leads to insufficient fuel combustion, so that the exhaust gas generated by the engine will deposit and accumulate dirt after impacting on the surface of the carrier 2, and will be solidified at low temperature, thereby affecting the service life and purification efficiency of the precious metal carrier 2. The existing technology often adopts the form of directly cutting the carrier 2 to block the surface for repair, which is very troublesome. Therefore, in order to solve this problem, or to delay the problem of oil sludge accumulation and solidification on the surface of the carrier 2, the following scheme is disclosed in the embodiment. Figures 6-9As shown, the impact surface of the carrier 2 with the exhaust gas is also provided with a fouling cleaning mechanism, and the back surface of the carrier 2 is provided with an elastic body 11 for driving the carrier 2 to move back, the cleaning mechanism comprises a metal sheet 8 fixed on the inner surface of the inner wall of the shell 1, wherein the metal sheet 8 is a double-path memory alloy, which is in a right angle state in the initial state and is deformed and adheres to the device after high temperature, and the rough surface 9 of the metal sheet 8 is arranged to adhere to the exhaust gas impact surface of the carrier 2, and the tail end of the metal sheet 8 is a bending part 10, which is used to guide the deformation of the carrier 2 impacting the metal sheet 8 in the state of being flatly adhered to the inner wall of the shell 1, as shown in Figure 8 As shown, the metal sheet 8 in the normal state is in the form of adhering to the front surface of the carrier 2, and in the process of purifying the exhaust gas, the carrier 2 is first moved by force to deform the metal sheet 8 to provide space in the state as shown in Figure 6 As shown, the metal sheet 8 is deformed and adheres to the inner wall of the shell 1 after being heated, which avoids the influence of the exhaust gas flow on the purification efficiency, and after stopping working, the metal sheet 8 will recover to the initial state due to the introduction of fluid for cooling in the shell 1, and the initial state can be a completely vertical state as shown in Figure 8 As shown, the metal sheet 8 is deformed and adheres to the inner wall of the shell 1 after being heated, which avoids the influence of the exhaust gas flow on the purification efficiency, and after stopping working, the metal sheet 8 will recover to the initial state due to the introduction of fluid for cooling in the shell 1, and the initial state can be a completely vertical state as shown in Figure 8 As shown, the metal sheet 8 is deformed and adheres to the inner wall of the shell 1 after being heated, which avoids the influence of the exhaust gas flow on the purification efficiency, and after stopping working, the metal sheet 8 will recover to the initial state due to the introduction of fluid for cooling in the shell 1, and the initial state can be a completely vertical state as shown in Figure 8 As shown, the metal sheet 8 is deformed and adheres to the inner wall of the shell 1 after being heated, which avoids the influence of the exhaust gas flow on the purification efficiency, and after stopping working, the metal sheet 8 will recover to the initial state due to the introduction of fluid for cooling in the shell 1, and the initial state can be a completely vertical state as shown in

[0026] Although the embodiments of the present application have been shown and described, it should be understood by those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant, self-cooling automotive three-way catalytic converter, comprising a housing (1) and a carrier (2) disposed within the housing (1), characterized in that: The middle section of the outer shell (1) has an inner and outer double-layer structure, wherein the cavity (3) in the double-layer structure is used to introduce fluid and cool the entire outer shell (1) and the carrier (2), wherein the fluid is introduced or discharged through a supply mechanism.

2. The high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 1, characterized in that: The supply mechanism includes a pipe (4) connected to the cavity (3), wherein the pipe (4) is connected to an external mechanism or an internal mechanism, both of which are used for fluid guidance.

3. A high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 2, characterized in that: The pipe (4) is connected to an external mechanism, which includes an external fan or a fan blade mechanism that generates airflow through exhaust gas discharge.

4. A high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 2, characterized in that: The pipe (4) is connected to a built-in mechanism, which includes a plate (7) that is slidably installed in the cavity (3). The plate (7) is connected to a moving mechanism, and the movement of the plate (7) is used to change the air pressure in the area directly connected to the pipe (4) and the cavity (3) and to achieve fluid transport.

5. A high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 4, characterized in that: The moving mechanism includes an elastic element (5) that is sealed and fixedly connected to the outer surface of the carrier (2). The elastic element (5) is installed in the inner ring notch of the cavity (3) in a sealed manner, and the carrier (2) is driven by the exhaust gas to pull the elastic element (5) to deform and move synchronously.

6. A high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 5, characterized in that: The outer surface of the elastic element (5) is also connected to a bar (6) for supporting the inner surface of the outer wall of the outer shell (1), and the bar (6) is used to connect to the plate (7).

7. A high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 5, characterized in that: The elastomer is high-temperature resistant rubber or corrugated metal.

8. A high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 1, characterized in that: The impact surface of the carrier (2) with the exhaust gas is also provided with a dirt cleaning mechanism, while the back of the carrier (2) is provided with an elastic body (11) for driving the carrier (2) to move back.

9. A high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 8, characterized in that: The cleaning mechanism includes a metal sheet (8) fixed on the inner surface of the inner wall of the outer shell (1). The metal sheet (8) is a two-way memory alloy. Its initial state is right angled and it will deform and adhere to the device after high temperature. The rough surface (9) of the metal sheet (8) is set as the exhaust gas impact surface of the carrier (2).

10. A high-temperature resistant, self-cooling automotive three-way catalytic converter according to claim 9, characterized in that: The tail end of the metal sheet (8) is a curved part (10), which is used to guide the deformation of the metal sheet (8) in the state of being flat against the inner wall of the outer shell (1) by the impact of the carrier (2) that is being moved back.

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