Exhaust pipe assembly

Abstract

The present application discloses an exhaust pipe assembly, which relates to the field of automobile exhaust systems, and includes an exhaust pipe body and a three-way catalytic converter. The exhaust pipe body includes a first pipe section, a mounting section, a transition section, and a second pipe section, which are sequentially distributed. The first pipe section is used to connect to a muffler, and the second pipe section is used to connect to an exhaust end of an engine. The three-way catalytic converter is installed in the mounting section, and a gap is left between the three-way catalytic converter and the inner wall of the mounting section. One end of the three-way catalytic converter close to the transition section is fixed to the mounting section, and the three-way catalytic converter is also sleeved with an elastic support ring, which is located between the three-way catalytic converter and the inner wall of the transition section to form a support. One end of the three-way catalytic converter is fixed to the mounting section, and the gap is strengthened by the elastic support ring to reduce collisions between the exhaust pipe body and the three-way catalytic converter, making the use more stable.

Description

Technical Field

[0001] The present application relates to the field of automobile exhaust systems, and more particularly, to an exhaust pipe assembly. Background Art

[0002] The vehicle exhaust system refers to the system that collects and discharges exhaust gas. The exhaust pipe assembly is an important part of the exhaust system. It generally includes an exhaust pipe and a three-way catalytic converter installed in the exhaust pipe. One end of the exhaust pipe is used to connect to the engine, and the other end is connected to the muffler for discharge.

[0003] For example, the Chinese patent with patent announcement number CN202140140U discloses a diesel engine exhaust system, including a front section of an exhaust pipe, a three-way catalytic converter and a muffler assembly, which are connected in sequence. The muffler assembly consists of a muffler, a middle section of the exhaust pipe connected to the front end of the muffler, and a rear section of the exhaust pipe connected to the rear end of the muffler. The muffler assembly is flange-connected to the three-way catalytic converter through the middle section of the exhaust pipe, and the front section of the exhaust pipe is flange-connected to the three-way catalytic converter.

[0004] The three-way catalytic converter is installed in the exhaust pipe. Due to thermal expansion and contraction, a gap will be left in the exhaust pipe. When the exhaust pipe is working, the vibration of the engine and gas emissions will inevitably cause the exhaust pipe itself to vibrate. Due to the existence of the gap, the vibration will cause the exhaust pipe and the three-way catalytic converter to collide with each other, affecting the stability of the three-way catalytic converter. This needs to be improved. Summary of the invention

[0005] In order to improve the situation where vibration causes collision between the exhaust pipe and the three-way catalytic converter, affecting the operating stability of the three-way catalytic converter, the present application provides an exhaust pipe assembly.

[0006] The present application provides an exhaust pipe assembly, which adopts the following technical solution:

[0007] An exhaust pipe assembly includes an exhaust pipe body and a three-way catalytic converter, wherein the exhaust pipe body includes a first pipe section, a mounting section, a transition section and a second pipe section which are sequentially distributed, wherein the first pipe section is used to be connected to a muffler, and the second pipe section is used to be connected to an exhaust end of an engine; the three-way catalytic converter is installed on the mounting section, a gap is left between the three-way catalytic converter and an inner wall of the mounting section, an end of the three-way catalytic converter close to the transition section is fixed to the mounting section, and the three-way catalytic converter is also sleeved with an elastic support ring, wherein the elastic support ring is located between the three-way catalytic converter and the inner wall of the transition section to form a support.

[0008] Through the above technical solution, by fixing one end of the three-way catalytic converter to the mounting section, the gap is strengthened by the elastic support ring. When the three-way catalytic converter expands due to heat, the elastic support ring can be deformed to form a buffer, and continuously provide a supporting effect during the vibration of the exhaust pipe body, thereby reducing the collision between the exhaust pipe body and the three-way catalytic converter and making it more stable to use.

[0009] Optionally, the three-way catalytic converter has a convex ring portion at one end close to the transition section, the three-way catalytic converter is welded and fixed to the mounting section through the convex ring portion, and the transition section is embedded in the inner circle of the convex ring portion and welded and fixed to the convex ring portion.

[0010] Through the above technical solution, the convex ring portion is welded and fixed to the transition section and the installation section at the same time by welding, so that the fixation of the three-way catalytic converter is more stable.

[0011] Optionally, the elastic support ring is a metal wire mesh ring, and the weaving method adopts tubular flat needle single-line or double-line forming.

[0012] Through the above technical solution, the metal wire mesh ring is elastically deformed and supported between the three-way catalytic converter and the mounting section when the three-way catalytic converter expands due to heat, thereby reducing the relative vibration between the three-way catalytic converter and the inner wall of the mounting section. In addition, the metal wire mesh ring has good thermal conductivity and can transfer the heat energy of the three-way catalytic converter to the mounting section in time, facilitating heat dissipation.

[0013] Optionally, the installation segment includes arc segment 1 and arc segment 2, the arc segment 1 is bent outward toward the arc segment 2 to form a groove for the arc segment 2 to be embedded, and the arc segment 1 is fixed to the arc segment 2 by welding.

[0014] Through the above technical scheme, arc segment one and arc segment two are assembled and then welded and fixed. The three-way catalytic converter with an elastic support ring can be installed on arc segment two first, and then arc segment one is covered on the three-way catalytic converter and assembled with arc segment two, and finally welded and fixed, making the installation operation more convenient.

[0015] Optionally, two second pipe sections are provided.

[0016] Through the above technical solution, the two second pipe sections are used for exhaust, which reduces airflow interference and makes the exhaust more stable.

[0017] Optionally, a ring is provided at one end of the second pipe section near the transition section, and the end of the ring near the transition section is flush with the second pipe section and fixed by full end face welding. The ring is embedded in the transition section and the transition section of the outer wall of the ring is welded and fixed away from the end of the installation section.

[0018] Through the above technical solution, the collar and the second pipe section are fixed and strengthened by full end face welding, and then the collar and the transition plate are welded and fixed. The end faces are fully welded to reduce leakage, and the outer peripheral surface of the collar is welded to the transition section to reduce the impact of welding on the second pipe section, so that the structural stability after connection is better.

[0019] Optionally, an elastic closed ring is further provided between the three-way catalytic converter and the inner wall of the mounting section, the elastic closed ring is located on the side of the elastic support ring away from the transition section, an oil storage cavity is formed on the side of the elastic ring close to the transition section, the elastic support ring is located in the oil storage cavity, and the oil storage cavity is filled with lubricating oil.

[0020] Through the above technical solution, an oil storage cavity is formed between the three-way catalytic converter and the inner wall of the mounting section through an elastic closed ring. In actual use, the vibration of the exhaust pipe body and the thermal expansion of the three-way catalytic converter will cause the elastic support ring to vibrate, deform, and rub against the mounting section and the three-way catalytic converter. At this time, the lubricating oil can enhance lubrication and reduce the wear of the elastic support ring. In addition, the lubricating oil is wrapped around the periphery of the three-way catalytic converter to provide a certain cooling effect.

[0021] Optionally, the installation section is further provided with an oil guide pipe, the oil guide pipe is made of heat-conducting material, the oil guide pipe is spirally wound around the installation section, and both ends of the oil guide pipe are connected to the oil storage cavity.

[0022] Through the above technical solution, the oil guide pipe is used to store lubricating oil. When the vehicle is moving, the airflow cools the oil guide pipe, which can timely cool the lubricating oil and enhance the heat dissipation effect of the three-way catalytic converter.

[0023] Optionally, the oil guide pipe is provided with an elastic telescopic tube, which is connected between the oil guide pipe and the liquid storage chamber. Both ends of the elastic telescopic tube are provided with one-way valves, and the flow direction of the one-way guide direction of the one-way valve is consistent. The elastic telescopic tube is configured to switch between a compression state and an extension state when the exhaust pipe body vibrates to pump the lubricating oil along the oil guide pipe.

[0024] Through the above technical solution, by setting an elastic expansion tube, when the exhaust pipe body vibrates, the vibration causes the oil guide pipe to vibrate, and the elastic expansion tube switches between a compressed state and an extended state during the vibration process. The elastic expansion tube cooperates with the one-way valve to pump the lubricating oil along the oil guide pipe, and then the lubricating oil with a higher temperature in the oil storage chamber is timely diverted to the oil guide pipe and then dissipated by the external airflow, thereby achieving a better heat dissipation effect.

[0025] Optionally, a counterweight block is provided at one end of the oil guide tube close to the elastic telescopic tube.

[0026] Through the above technical solution, the counterweight block can increase the inertia of the oil guide pipe, making the compression and elongation of the elastic telescopic tube more obvious when vibration is generated, making the transportation of lubricating oil more efficient.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] (1) By fixing one end of the three-way catalytic converter to the mounting section, the gap is strengthened by an elastic support ring to reduce the collision between the exhaust pipe body and the three-way catalytic converter, making the use more stable;

[0029] (2) The wire mesh ring is elastically deformed and supported between the three-way catalytic converter and the mounting section when the three-way catalytic converter expands due to heat. In addition, the wire mesh ring has good thermal conductivity and can transfer the heat energy of the three-way catalytic converter to the mounting section in a timely manner, thereby facilitating heat dissipation;

[0030] (3) By setting an elastic expansion tube, when the exhaust pipe body vibrates, the elastic expansion tube switches between a compression state and an extension state during the vibration process. The elastic expansion tube cooperates with the one-way valve to pump the lubricating oil along the oil guide pipe, thereby timely guiding the lubricating oil with a higher temperature in the oil storage chamber into the oil guide pipe and then cooperating with the external airflow to dissipate heat, thereby achieving a better heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an overall schematic diagram of the first embodiment;

[0032] Figure 2 It is a partial explosion schematic diagram of embodiment 1;

[0033] Figure 3 It is a schematic diagram of the metal wire mesh ring weaving of the first embodiment;

[0034] Figure 4 It is an overall schematic diagram of the second embodiment;

[0035] Figure 5 It is a partial cross-sectional schematic diagram of the second embodiment.

[0036] Figure numerals: 1. exhaust pipe body; 11. first pipe section; 12. installation section; 121. arc section one; 122. arc section two; 13. transition section; 14. second pipe section; 2. three-way catalytic converter; 21. convex ring; 3. ring body; 4. elastic support ring; 5. embedded groove; 6. sleeve ring; 7. elastic closing ring; 8. oil guide pipe; 9. one-way valve; 10. oil storage chamber; 15. elastic telescopic tube; 16. counterweight. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings.

[0038] An embodiment of the present application discloses an exhaust pipe assembly.

[0039] Embodiment 1:

[0040] An exhaust pipe assembly, such as Figure 1 and Figure 2 As shown, it includes an exhaust pipe body 1 and a three-way catalytic converter 2. The exhaust pipe body 1 includes a first pipe section 11, a mounting section 12, a transition section 13 and a second pipe section 14, which are distributed in sequence. A ring body 3 is sleeved on one end of the first pipe section 11 close to the mounting section 12, and the end of the ring body 3 close to the mounting section 12 is flush with the first pipe section 11 and is fixed to the first pipe section 11 by full end face welding. A part of the ring body 3 is embedded in the mounting section 12, and the outer peripheral wall of the ring body 3 is fixed to the mounting section 12 by welding with welding wire. In actual use, the end of the first pipe section 11 away from the mounting section 12 is used to connect to the muffler.

[0041] See also Figure 2 and Figure 3 The three-way catalytic converter 2 is installed in the installation section 12. The end of the three-way catalytic converter 2 close to the transition section 13 has a convex ring portion 21. The end of the three-way catalytic converter 2 close to the transition section 13 is welded and fixed to the installation section 12 through the convex ring portion 21. A gap is left between the three-way catalytic converter 2 and the inner wall of the installation section 12. The three-way catalytic converter 2 is also sleeved with an elastic support ring 4. The elastic support ring 4 is located between the three-way catalytic converter 2 and the inner wall of the transition section 13 to form a support. The elastic support ring 4 can be a rubber ring. In this example, the elastic support ring 4 is a metal mesh ring, such as an iron mesh ring or a steel mesh ring. The weaving method of the metal mesh ring adopts tubular flat needle single line or double line forming.

[0042] See also Figure 1 and Figure 2 The installation section 12 includes an arc section 1 121 and an arc section 2 122. The arc section 1 121 is bent outward toward the arc section 2 122 to form a groove 5 for the arc section 2 122 to be embedded. The arc section 1 121 is fixed to the arc section 2 122 by welding. In actual installation, the three-way catalytic converter 2 with the elastic support ring 4 is first installed on the arc section 2 122, and then the arc section 1 121 is covered on the three-way catalytic converter 2 and assembled with the arc section 2 122, and finally fixed by welding.

[0043] The transition section 13 is embedded in the inner circle of the convex ring portion 21 and is welded and fixed to the convex ring portion 21. Two second pipe sections 14 are provided, and each second pipe section 14 is provided with a collar 6 at one end close to the transition section 13. The end of the collar 6 close to the transition section 13 is flush with the second pipe section 14 and is fixed by full end face welding. The collar 6 is embedded in the transition section 13 and the outer wall of the collar 6 is welded and fixed to the end of the transition section 13 away from the installation section 12. In actual use, the end of the second pipe section 14 away from the transition section 13 is used to connect to the exhaust end of the engine, and exhaust is carried out through the two second pipe sections 14, reducing airflow interference and making the exhaust more stable.

[0044] The welding fixation in the embodiments of the present application all adopts the full welding method, wherein the full welding is intended to express that the joint seam is completely closed by welding, the end face and the end face seam welding are all welded without filling wire, and the seam welding of the outer peripheral wall and the end face is welded with the help of welding wire, and the welding wire is SUS308 or SUS309.

[0045] The working principle of this embodiment is:

[0046] In the present application, one end of the three-way catalytic converter 2 is fixed to the mounting section 12, and the gap is reinforced by an elastic support ring 4. When the three-way catalytic converter 2 expands due to heat, the metal wire mesh ring elastically deforms and supports the three-way catalytic converter 2 and the mounting section 12, thereby reducing the relative vibration of the three-way catalytic converter 2 and the inner wall of the mounting section 12, and continuously providing a supporting effect during the vibration of the exhaust pipe body 1, thereby reducing the collision between the exhaust pipe body 1 and the three-way catalytic converter 2. In addition, the metal wire mesh ring has good thermal conductivity, and can transfer the heat energy of the three-way catalytic converter 2 to the mounting section 12 in a timely manner, thereby facilitating heat dissipation.

[0047] Embodiment 2:

[0048] An exhaust pipe assembly, see Figure 4 and Figure 5 , which is different from the first embodiment in that it further includes an elastic closed ring 7 and an oil guide pipe 8. The elastic closed ring 7 is fixed between the three-way catalytic converter 2 and the inner wall of the mounting section 12, and the elastic closed ring 7 is located on the side of the elastic support ring 4 away from the transition section 13. The side of the elastic closed ring 7 close to the transition section 13 cooperates with the three-way catalytic converter 2 and the inner wall of the mounting section 12 to form an oil storage chamber 10, and the oil storage chamber 10 is filled with lubricating oil, and the elastic support ring 4 is located in the oil storage chamber 10. In actual use, the lubricating oil can enhance lubrication and reduce the wear of the elastic support ring 4.

[0049] The oil guide pipe 8 is made of heat-conducting material, such as a copper pipe, a steel pipe, etc. The oil guide pipe 8 is spirally wound around the mounting section 12. Both ends of the oil guide pipe 8 are provided with elastic telescopic pipes 15, and both ends of the oil guide pipe 8 are connected with the oil storage chamber 10 through the elastic telescopic pipes 15. The elastic telescopic pipe 15 is a rubber bellows. For the convenience of connection, the end of the elastic telescopic pipe 15 close to the oil guide pipe 8 is sleeved on the end of the oil guide pipe 8 and fixed by a clamp. The end of the elastic telescopic pipe 15 close to the mounting section 12 can also be fixed by a clamp to hold the convex ring of the mounting section 12. The end of the elastic telescopic pipe 15 close to the mounting section 12 can also be fixed to the mounting section 12 by bonding.

[0050] The elastic telescopic tubes 15 are distributed on opposite sides of the spiral axis of the oil guide tube 8. Both ends of each elastic telescopic tube 15 are provided with a one-way valve 9, and the one-way flow direction of the one-way valve 9 is consistent. A counterweight 16 is fixed to one end of the oil guide tube 8 close to the elastic telescopic tube 15. The counterweight 16 is annular and can also be used for the elastic telescopic tube 15 to abut against to achieve the limit position of the oil guide tube 8 when it is inserted into the elastic telescopic tube 15.

[0051] When the exhaust pipe body 1 vibrates, the elastic telescopic tube 15 switches between the compressed state and the extended state to pump the lubricating oil along the oil guide pipe 8. At this time, the two elastic telescopic tubes 15 are distributed on opposite sides of the mounting section 12, so that the pumping efficiency of the elastic telescopic tube 15 is higher, and the lubricating oil with a higher temperature in the oil storage chamber 10 is timely diverted to the oil guide pipe 8 and then dissipated by the external airflow, thereby achieving a better heat dissipation effect. In addition, the elastic telescopic tube 15 also provides a buffer when the oil storage chamber 10 is compressed after the three-way catalytic converter 2 expands, making the overall operation more stable.

[0052] 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 pipe assembly, comprising an exhaust pipe body (1) and a three-way catalytic converter (2), characterized in that: The exhaust pipe body (1) comprises a first pipe section (11), a mounting section (12), a transition section (13) and a second pipe section (14) which are sequentially arranged, wherein the first pipe section (11) is used to be connected to a muffler, and the second pipe section (14) is used to be connected to an exhaust end of an engine; the three-way catalytic converter (2) is mounted on the mounting section (12), a gap is left between the three-way catalytic converter (2) and an inner wall of the mounting section (12), an end of the three-way catalytic converter (2) close to the transition section (13) is fixed to the mounting section (12), and the three-way catalytic converter (2) is also sleeved with an elastic support ring (4), and the elastic support ring (4) is located between the three-way catalytic converter (2) and the inner wall of the transition section (13) to form a support; The elastic support ring (4) is a metal wire mesh ring, and the weaving method adopts tubular flat needle single line or double line forming; An elastic closed ring (7) is further provided between the three-way catalytic converter (2) and the inner wall of the mounting section (12); the elastic closed ring (7) is located on a side of the elastic support ring (4) away from the transition section (13); an oil storage cavity (10) is formed on a side of the elastic ring close to the transition section (13); the elastic support ring (4) is located in the oil storage cavity (10), and the oil storage cavity (10) is filled with lubricating oil; The installation section (12) is also provided with an oil guide pipe (8), the oil guide pipe (8) is made of a heat-conducting material, the oil guide pipe (8) is spirally wound around the installation section (12), and both ends of the oil guide pipe (8) are connected to the oil storage chamber (10); The oil guide pipe (8) is provided with an elastic telescopic pipe (15), the elastic telescopic pipe (15) is connected between the oil guide pipe (8) and the liquid storage chamber, both ends of the elastic telescopic pipe (15) are provided with a one-way valve (9), the one-way flow direction of the one-way valve (9) is consistent, and the elastic telescopic pipe (15) is configured to switch between a compressed state and an extended state when the exhaust pipe body (1) vibrates, so as to pump the lubricating oil along the oil guide pipe (8).

2. The exhaust pipe assembly according to claim 1, characterized in that: The three-way catalytic converter (2) has a convex ring portion (21) at one end close to the transition section (13), and the three-way catalytic converter (2) is welded and fixed to the mounting section (12) via the convex ring portion (21), and the transition section (13) is embedded in the inner ring of the convex ring portion (21) and is welded and fixed to the convex ring portion (21).

3. The exhaust pipe assembly according to claim 1, characterized in that: The installation section (12) comprises an arc section 1 (121) and an arc section 2 (122); the arc section 1 (121) is bent outwardly toward the arc section 2 (122) to form an embedding groove (5) for the arc section 2 (122) to be embedded; the arc section 1 (121) is fixed to the arc section 2 (122) by welding.

4. The exhaust pipe assembly according to claim 1, characterized in that: There are two second pipe sections (14).

5. The exhaust pipe assembly according to claim 4, characterized in that: A collar (6) is provided at one end of the second pipe section (14) close to the transition section (13); the end of the collar (6) close to the transition section (13) is flush with the second pipe section (14) and is fixed by full end face welding; the collar (6) is embedded in the transition section (13) and the outer wall of the collar (6) is fixed by welding to the end of the transition section (13) away from the installation section (12).

6. The exhaust pipe assembly according to claim 1, characterized in that: A counterweight block (16) is provided at one end of the oil guide pipe (8) close to the elastic telescopic pipe (15).

Images