Three-way catalyst and vehicle

Abstract

The utility model relates to a three-way catalytic converter and a vehicle, the three-way catalytic converter comprises a main body part, a connecting piece and a differential pressure pipe, the main body part comprises a cavity used for containing a purifying agent, the connecting piece is connected with the main body part and can communicate with the cavity, and the differential pressure pipe is installed on the connecting piece and can communicate with the cavity through the connecting piece. The connecting piece comprises a first bending section and a second bending section which are communicated with each other, the first bending section is connected with the main body part, the second bending section is located at the end, away from the main body part, of the first bending section, and the differential pressure pipe is connected with the end, away from the first bending section, of the second bending section. The included angle between the first bending section and the second bending section in the connecting piece is larger than 90 degrees, so that liquid generated by condensation in the differential pressure pipe can conveniently flow between the first bending section and the second bending section and then flow out of the connecting piece, the possibility that the liquid generated in the differential pressure pipe is accumulated in the connecting piece is reduced, and in a low-temperature environment, the connecting piece is not prone to falling off. And the possibility of pipeline blockage caused by liquid freezing can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a three-way catalyst and a vehicle. BACKGROUND

[0002] The three-way catalyst is an off-purification device installed in the exhaust system of the automobile, which can convert CO, HC and NOx harmful gases in automobile exhaust into harmless carbon dioxide, water and nitrogen through oxidation and reduction.

[0003] The three-way catalyst includes a communicating cylinder and a differential pressure pipe, and the liquid condensed in the differential pressure pipe is easy to accumulate at the connection between the differential pressure pipe and the cylinder. When the vehicle is used in a low temperature environment, the liquid accumulated at the connection between the differential pressure pipe and the cylinder is easy to freeze, which causes the differential pressure pipe to be blocked and affects the normal work of the three-way catalyst. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a three-way catalyst and a vehicle to solve the problem that the liquid accumulated at the connection between the differential pressure pipe and the cylinder is easy to freeze, which causes the differential pressure pipe to be blocked and affects the normal work of the three-way catalyst.

[0005] In a first aspect, the embodiments of the present application provide a three-way catalyst, which includes:

[0006] A main body part, which includes a cavity;

[0007] A connecting piece, which is connected with the main body part and communicates with the cavity;

[0008] A differential pressure pipe, which is installed on the connecting piece and communicates with the main body part through the connecting piece;

[0009] The connecting piece includes a first bending section and a second bending section which communicate with each other, the included angle between the first bending section and the second bending section is greater than 90°, one end of the first bending section away from the second bending section is connected with the main body part, and one end of the second bending section away from the first bending section is connected with the differential pressure pipe.

[0010] In a possible embodiment, the first bending section and the second bending section include a transition section therebetween, one end of the transition section is connected with the first bending section, the other end is connected with the second bending section, and the cross section of the transition section is arc-shaped.

[0011] In a possible embodiment, the inner diameter of the connecting piece is greater than the inner diameter of the differential pressure pipe.

[0012] In a possible embodiment, the cross section of the connecting piece is ring-shaped, and the outer diameter of the connecting piece is 20mm to 25mm.

[0013] In a possible implementation, the wall thickness of the connecting piece is greater than the wall thickness of the differential pressure pipe.

[0014] In a possible implementation, the first bent section is welded to the main body.

[0015] In a possible implementation, a mounting piece is arranged between the connecting piece and the differential pressure pipe, the mounting piece is mounted at one end of the second bent section away from the first bent section, and the differential pressure pipe is connected to the second bent section through the mounting piece.

[0016] In a possible implementation, the mounting piece is welded to the second bent section.

[0017] In a possible implementation, the differential pressure pipe is detachably connected to the mounting piece.

[0018] In a second aspect, the embodiments of the present application also provide a vehicle, which comprises an exhaust system, and the exhaust system comprises a three-way catalyst, and the three-way catalyst is any one of the above-mentioned three-way catalysts.

[0019] The present application relates to a three-way catalyst and a vehicle, the three-way catalyst comprising a main body, a connecting piece and a differential pressure pipe, the main body comprising a cavity for containing a purifying agent, the connecting piece being connected to the main body and capable of communicating with the cavity, and the differential pressure pipe being mounted to the connecting piece and capable of communicating with the cavity through the connecting piece. The connecting piece comprises a first bent section and a second bent section in communication with each other, the first bent section being connected to the main body, the second bent section being located at one end of the first bent section away from the main body, and the differential pressure pipe being connected to one end of the second bent section away from the first bent section. The angle between the first bent section and the second bent section in the connecting piece is greater than 90°, which facilitates the flow of liquid condensed in the differential pressure pipe between the first bent section and the second bent section, and then out of the connecting piece, thereby reducing the possibility of the liquid condensed in the differential pressure pipe accumulating in the connecting piece, and reducing the possibility of the liquid blocking the pipeline due to freezing in a low-temperature environment. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 FIG. 1 is a structural schematic diagram of a three-way catalyst in the prior art;

[0022] Figure 2A structure schematic diagram of a three-way catalyst provided by an embodiment of the present application is shown in the following figure.

[0023] Figure 3 A structure schematic diagram of a connecting piece and a mounting piece provided by an embodiment of the present application is shown in the following figure.

[0024] Figure 4 An exploded view of a connecting piece and a mounting piece provided by an embodiment of the present application is shown in the following figure.

[0025] Reference signs:

[0026] 1 - main body part;

[0027] 2 - connecting piece;

[0028] 21 - first bending section;

[0029] 22 - second bending section;

[0030] 23 - transition section;

[0031] 3 - differential pressure pipe;

[0032] 31 - bending area;

[0033] 32 - fixing part;

[0034] 321 - flared opening;

[0035] 4 - mounting piece. DETAILED DESCRIPTION

[0036] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below in combination with the drawings.

[0037] It should be clear that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0039] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects have an "or" relationship.

[0040] The three-way catalyst includes a main body 1 and a differential pressure pipe 3, the main body 1 is provided with a purifying agent for converting harmful gases in automobile exhaust into harmless carbon dioxide, water and nitrogen, the main body 1 is provided with two differential pressure pipes 3 at the gas inlet end and the gas outlet end respectively, the other end of the differential pressure pipe 3 is connected with a differential pressure sensor assembly for detecting the pressure difference between the gas inlet end and the gas outlet end of the main body 1 to determine whether to start the regeneration model. The high-temperature exhaust of the vehicle contains gaseous water, and the gaseous water in the differential pressure pipe is liquefied after cooling, as shown in the figure, due to the limitation of the arrangement space of the three-way catalyst, the differential pressure pipe 3 in the related art includes a bending area 31 to connect the differential pressure pipe 3 with the main body 1, the position of the bending area 31 is usually an acute angle, and under the influence of tension, the liquefied water is not convenient to flow into the main body, and further accumulates in the bending area, when the temperature is low, the accumulated liquid is easy to freeze, causing the differential pressure pipe 3 to be blocked, and further affecting the normal work of the three-way catalyst. Figure 1 As shown in the figure, the differential pressure pipe 3 in the related art includes a bending area 31 to connect the differential pressure pipe 3 with the main body 1, the position of the bending area 31 is usually an acute angle, and under the influence of tension, the liquefied water is not convenient to flow into the main body, and further accumulates in the bending area, when the temperature is low, the accumulated liquid is easy to freeze, causing the differential pressure pipe 3 to be blocked, and further affecting the normal work of the three-way catalyst.

[0041] As shown in the figure, the differential pressure pipe 3 in the related art includes a bending area 31 to connect the differential pressure pipe 3 with the main body 1, the position of the bending area 31 is usually an acute angle, and under the influence of tension, the liquefied water is not convenient to flow into the main body, and further accumulates in the bending area, when the temperature is low, the accumulated liquid is easy to freeze, causing the differential pressure pipe 3 to be blocked, and further affecting the normal work of the three-way catalyst. Figure 2 As shown in the figure, the differential pressure pipe 3 in the related art includes a bending area 31 to connect the differential pressure pipe 3 with the main body 1, the position of the bending area 31 is usually an acute angle, and under the influence of tension, the liquefied water is not convenient to flow into the main body, and further accumulates in the bending area, when the temperature is low, the accumulated liquid is easy to freeze, causing the differential pressure pipe 3 to be blocked, and further affecting the normal work of the three-way catalyst.

[0042] The gas inlet end and the gas outlet end of the main body 1 are provided with the differential pressure pipe 3, the differential pressure pipe 3 is communicated with the cavity in the main body 1 through the connecting piece 2, so that the air pressure in the main body 1 can be transmitted to the differential pressure sensor assembly through the connecting piece 2 and the differential pressure pipe 3, and the pressure difference between the gas inlet end and the gas outlet end of the main body 1 is convenient to monitor. If the angle between the first bending section 21 and the second bending section 22 in the connecting piece 2 is less than 90°, the resistance of the liquid flowing in the first bending section 21 and the second bending section 22 is large, so that the liquefied liquid is easy to accumulate in the connecting piece 2, and when the temperature is low, it is easy to freeze, causing the differential pressure pipe 3 to be blocked. The angle between the first bending section 21 and the second bending section 22 in the connecting piece 2 is greater than 90°, which reduces the possibility of liquid accumulation in the connecting piece 2 under the action of surface tension, and facilitates the liquid to flow into the main body 1 from the connecting piece 2, and reduces the possibility of blockage of the differential pressure pipe 3 in a low-temperature environment.

[0043] In a possible embodiment, the angle between the differential pressure pipe 3 and the horizontal direction should be greater than 15°, and the end connected with the main body part 1 is inclined downward, so that the liquid can flow to the main body part 1 along the differential pressure pipe 3 under the action of gravity, reducing the possibility of liquid residue in the differential pressure pipe 3. The bending angle of the end of the differential pressure pipe 3 connected with the connecting piece 2 is greater than 90°, facilitating the liquid in the differential pressure pipe 3 to flow into the connecting piece 2.

[0044] As shown in Figure 3 In a possible embodiment, the transition section 23 is arranged between the first bending section 21 and the second bending section 22, and the cross section of the transition section 23 is arc-shaped. One end of the transition section 23 is connected with the first bending section 21, and the other end is connected with the second bending section 22.

[0045] After entering one end of the connecting piece 2, the liquid will flow out from the other end through the transition section 23. The cross section of the transition section 23 is arc-shaped, so that the inner wall of the transition section 23 is relatively smooth, reducing the resistance to the liquid and facilitating the flow of the liquid, reducing the possibility of liquid accumulation in the connecting piece 2. When the temperature is low, the possibility of ice blocking in the connecting piece 2 can be reduced.

[0046] As shown in Figure 2 and Figure 3 In a possible embodiment, the first bending section 21 of the connecting piece 2 is fixed to the main body part 1 by welding.

[0047] The connecting piece 2 can be made of SUH409L stainless steel, so that the first bending section 21 of the connecting piece 2 can be welded to the main body part 1, and the possibility of corrosion of the connecting piece 2 can be reduced. The welding of the first bending section 21 to the main body part 1 can improve the connection strength of the connecting piece 2 and the main body part 1, reduce the possibility of the connecting piece 2 falling off, and improve the sealing property between the connecting piece 2 and the main body part 1, reducing the possibility of liquid leakage at the connection position of the connecting piece 2 and the main body part 1.

[0048] In a possible embodiment, the inner diameter of the connecting piece 2 is greater than the inner diameter of the differential pressure pipe 3.

[0049] The inner diameter of the connecting piece 2 is greater than the inner diameter of the differential pressure pipe 3, facilitating the condensed liquid in the differential pressure pipe 3 to flow to the connecting piece 2, and reducing the possibility of liquid accumulation in the differential pressure pipe 3.

[0050] As shown in Figure 2 and Figure 3As shown in possible embodiments, the cross section of the differential pressure pipe 3 and the cross section of the connecting piece 2 are annular, the outer diameter of the differential pressure pipe 3 can be 8mm to 10mm, and the wall thickness can be 1mm, the outer diameter of the connecting piece 2 is 20mm to 25mm, and the wall thickness can be 1.5mm. The mounting piece 4 is arranged between the connecting piece 2 and the differential pressure pipe 3, and the mounting piece 4 is mounted at the end of the second bending section 22 away from the first bending section 21, and the differential pressure pipe 3 is connected with the second bending section 22 through the mounting piece 4.

[0051] The outer diameter of the connecting piece 2 can be 20mm, 22mm, 25mm, etc., and the wall thickness is 1.5mm, which can make the inner diameter of the connecting piece 2 larger than the inner diameter of the differential pressure pipe 3, so as to facilitate the liquid to flow out of the differential pressure pipe 3, and can reduce the possibility of liquid accumulation in the differential pressure pipe 3. The inner diameter of the connecting piece 2 and the outer diameter of the differential pressure pipe 3 are greatly different, and the differential pressure pipe 3 is not directly mounted on the second bending section 22, and the mounting piece 4 is arranged at the end of the second bending section 22, which facilitates the connection of the differential pressure pipe 3 and the connecting piece 2.

[0052] In a possible embodiment, the mounting piece 4 is welded and fixed with the second bending section 22.

[0053] The mounting piece 4 is welded and fixed with the second bending section 22, which can improve the connection strength of the mounting piece 4 and the second bending section 22, reduce the possibility of the mounting piece 4 falling off, and is beneficial to improve the reliability of the three-way catalyst. At the same time, the mounting piece 4 is welded and fixed with the end of the second bending section 22, which can reduce the possibility of liquid leakage at the connection position of the mounting piece 4 and the second bending section 22. The material of the mounting piece 4 can be SUS304, which can reduce the possibility of rusting of the mounting piece 4.

[0054] In a possible embodiment, the wall thickness of the connecting piece 2 can be 1.5mm, and the wall thickness of the differential pressure pipe 3 can be 1mm, so as to make the wall thickness of the connecting piece 2 greater than the wall thickness of the differential pressure pipe 3.

[0055] The mounting piece 4 is welded to the end of the second bending section 22 in the connecting piece 2, the wall thickness of the connecting piece 2 can be 1.5mm greater than the wall thickness of the differential pressure pipe 3, which can improve the welding area of the mounting piece 4 and the connecting piece 2, improve the welding strength of the mounting piece 4 and the connecting piece 2, reduce the possibility of the mounting piece 4 falling off, and is beneficial to improve the reliability of the mounting piece 4 after installation.

[0056] As shown in possible embodiments, the end of the differential pressure pipe 3 is provided with a fixing part 32, and the differential pressure pipe 3 is connected with the mounting piece 4. Figure 2 Figure 3 As shown in possible embodiments, the end of the differential pressure pipe 3 is provided with a fixing part 32, and the differential pressure pipe 3 is connected with the mounting piece 4.

[0057] ​The mounting piece 4 can be a nut seat, the fixing part 32 can be a bolt head, the differential pressure pipe 3 is screwed with the mounting piece 4, the assembly torque can be 45±5 N·m, and the reliability of the differential pressure pipe 3 after being connected with the mounting piece 4 can be improved. The differential pressure pipe 3 and the mounting piece 4 are connected through screwing, and are convenient to disassemble and replace when the main body part 1 or the differential pressure pipe 3 fails. The end of the fixing part 32 is a flared mouth 321, the cross-sectional area of the flared mouth 321 gradually increases in the direction away from the differential pressure pipe 3, the difference between the inner diameter of the differential pressure pipe 3 and the connecting piece 2 is reduced, the sealing performance of the differential pressure pipe 3 after being connected with the connecting piece 2 can be improved, and the possibility of liquid leakage at the connecting position is reduced.

[0058] The embodiment of the application also provides a vehicle, which comprises an exhaust system, and the exhaust system comprises the three-way catalyst according to any one of the above, and therefore has the effects of any one of the above, and the possibility of the differential pressure pipe 3 being blocked can be reduced.

[0059] The exhaust system of the vehicle is provided with the three-way catalyst, which can purify exhaust gas, and harmful gases such as carbon monoxide, hydrocarbons and nitrogen oxides in the exhaust gas are converted into harmless carbon dioxide, water and nitrogen by oxidation and reduction, which is beneficial to environmental protection.

[0060] The application relates to a three-way catalyst and a vehicle, the three-way catalyst comprising a main body part 1, a connecting piece 2 and a differential pressure pipe 3, the main body part 1 comprising a cavity for containing a purifying agent, the connecting piece 2 being connected with the main body part 1 and capable of communicating with the cavity, and the differential pressure pipe 3 being installed on the connecting piece 2 and capable of communicating with the cavity through the connecting piece 2. The connecting piece 2 comprises a first bending section 21 and a second bending section 22 which communicate with each other, the first bending section 21 being connected with the main body part 1, the second bending section 22 being located at one end of the first bending section 21 away from the main body part 1, and the differential pressure pipe 3 being connected with one end of the second bending section 22 away from the first bending section 21. The angle between the first bending section 21 and the second bending section 22 in the connecting piece 2 is greater than 90°, so that the liquid condensed in the differential pressure pipe can flow between the first bending section 21 and the second bending section 22 and then flow out of the connecting piece 2, and the possibility of the liquid condensed in the differential pressure pipe being accumulated in the connecting piece 2 is reduced, and the possibility of the liquid being frozen to block the pipeline in a low-temperature environment is reduced.

Claims

1. A three-way catalyst characterized by comprising: The three-way catalyst comprises: a main body (1) comprising a cavity; a connecting piece (2) connected with the main body (1) and communicating with the cavity; a differential pressure pipe (3) installed on the connecting piece (2) and communicating with the main body (1) through the connecting piece (2); wherein the connecting piece (2) comprises a first bending section (21) and a second bending section (22) communicating with each other, an included angle between the first bending section (21) and the second bending section (22) is greater than 90°, one end of the first bending section (21) away from the second bending section (22) is connected with the main body (1), and one end of the second bending section (22) away from the first bending section (21) is connected with the differential pressure pipe (3).

2. The three-way catalyst according to claim 1, characterized in that, A transition section (23) is included between the first bending section (21) and the second bending section (22), one end of the transition section (23) is connected with the first bending section (21), the other end is connected with the second bending section (22), and a cross section of the transition section (23) is arc-shaped.

3. The three-way catalyst according to claim 1, characterized by An inner diameter of the connecting piece (2) is greater than an inner diameter of the differential pressure pipe (3).

4. The three-way catalyst according to claim 1, characterized by A cross section of the connecting piece (2) is annular, and an outer diameter of the connecting piece (2) is 20-25 mm.

5. The three-way catalyst according to claim 3, characterized by A wall thickness of the connecting piece (2) is greater than a wall thickness of the differential pressure pipe (3).

6. The three-way catalyst according to claim 1, characterized by The first bending section (21) is welded and fixed with the main body (1).

7. The three-way catalyst according to claim 1, characterized by A mounting piece (4) is arranged between the connecting piece (2) and the differential pressure pipe (3), the mounting piece (4) is installed on one end of the second bending section (22) away from the first bending section (21), and the differential pressure pipe (3) is connected with the second bending section (22) through the mounting piece (4).

8. The three-way catalyst according to claim 7, characterized in that The mounting piece (4) is welded and fixed with the second bending section (22).

9. The three-way catalyst according to claim 7, characterized in that, A fixing part (32) is arranged at an end of the differential pressure pipe (3), and the fixing part (32) is connected with the mounting piece (4).

10. A vehicle characterized by comprising: The vehicle comprises an exhaust system, and the exhaust system comprises a three-way catalyst, which is the three-way catalyst according to any one of claims 1-9.

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