Exhaust cooling system and engine

Abstract

The utility model provides an exhaust cooling system and an engine. The exhaust cooling system comprises a power body, a silencer body and a wind scooper. A first air duct is arranged in the power body, and the silencer body is provided with an exhaust pipe. The wind scooper is installed on the silencer body, an air inlet and an air guide cavity which are communicated are formed between the wind scooper and the silencer body, the air inlet is close to the air outlet end of the first air channel, the wind scooper is provided with a first exhaust outlet allowing the exhaust pipe to stretch into, an exhaust gap is formed between the first exhaust outlet and the exhaust pipe, and the exhaust gap is communicated with the air guide cavity. By designing the wind scooper on the silencer body, not only can the silencer body be cooled, but also the exhaust pipe can be cooled, so that the temperature of the exhaust pipe and the exhaust temperature of the exhaust pipe can be reduced. Due to the fact that the exhaust pipe is arranged in the first exhaust outlet in the penetrating mode, the airflow can continuously take away heat on the surface of the exhaust pipe in the exhaust process, the exhaust temperature is further reduced, and the safety of the engine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of muffler structures, in particular to an exhaust cooling system and an engine. Background Art

[0002] With increasingly stringent exhaust emission regulations, simply adjusting the mixture concentration is no longer sufficient. Compliance often requires the addition of catalysts or even air injection mechanisms to the muffler. Conventional muffler exhaust temperatures can reach around 700°C. The high exhaust pipe temperature and reddened exhaust port can quickly ignite if it comes into contact with flammable materials. Therefore, improper placement or misuse of the muffler can cause fires. Therefore, reducing muffler exhaust temperatures is a pressing issue for those skilled in the art. Utility Model Content

[0003] In view of the defects in the prior art, the purpose of the present invention is to provide an exhaust cooling system and an engine to reduce the exhaust temperature and improve safety.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an exhaust cooling system, including a power body, which is provided with a first air duct; a muffler body, which is arranged on the power body, and an exhaust pipe is provided on the side of the muffler body facing away from the power body; and an air guide cover, which is arranged on the muffler body, and a connected air inlet and an air guide cavity are formed between the air guide cover and the muffler body, the air inlet is close to the air outlet end of the first air duct, and the air guide cover is provided with a first air outlet for the exhaust pipe to extend into, and an exhaust gap is formed between the first air outlet and the exhaust pipe, and the exhaust gap is connected to the air guide cavity.

[0005] Preferably, the exhaust pipe is provided with at least one air inlet hole, and the air inlet hole is located in the air guide cavity.

[0006] Preferably, a baffle is provided in the air inlet, and the baffle extends along the length direction of the exhaust pipe, and one end of the baffle away from the muffler body is inclined toward the axis of the exhaust pipe.

[0007] Preferably, a recessed groove is formed on the side wall of the muffler body located in the air guide cavity, and the exhaust pipe is arranged in the recessed groove.

[0008] Preferably, an air guide tube is provided on the air guide cover, the air guide tube is communicated with the first air exhaust port, the exhaust pipe extends into the air guide tube, and the exhaust gap is formed between the exhaust pipe and the air guide tube.

[0009] Preferably, the power body is provided with an outer shell, and the outer shell cover is arranged outside the muffler body and the wind guide cover; a second air duct is formed between the outer shell and the muffler body, and the outer shell is provided with a second exhaust port connected to the second air duct, and the first exhaust port and the exhaust pipe are both arranged in the second exhaust port.

[0010] Preferably, the muffler body has a first side and a second side relative to each other, and the air inlet is arranged on the first side; an air guide plate is provided in the second air duct, and the air guide plate is arranged between the air inlet and the air outlet end of the first air duct, and the air guide plate is used to guide the airflow discharged from the air outlet end of the first air duct to the second side.

[0011] Preferably, the air guide plate is provided on the muffler body, and one end of the air guide plate is inclined toward an air outlet end of the first air duct.

[0012] Preferably, the power body is provided with a connecting pipe, both ends of which are respectively connected to the muffler body and the cylinder head of the power body, and the connection between the connecting pipe and the muffler body is close to the air inlet.

[0013] The utility model also provides an engine, comprising the above exhaust cooling system.

[0014] Beneficial effects of the utility model:

[0015] The utility model discloses an exhaust cooling system and engine. By designing an air guide cover on the muffler body, the airflow used to cool the cylinder head of the power main body, after entering the air guide chamber, can not only cool the muffler body, but also cool the exhaust pipe, thereby reducing the exhaust pipe and its exhaust temperature. At the same time, because the exhaust pipe is installed in the first exhaust port, the airflow in the air guide chamber will flow out through the exhaust gap along the surface of the exhaust pipe. Therefore, the airflow will continuously remove heat from the exhaust pipe surface during the exhaust process, thereby further reducing the exhaust temperature and improving the safety of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0017] Figure 1 A schematic structural diagram of an exhaust cooling system provided in one embodiment of the present utility model;

[0018] Figure 2 It is a structural diagram of the other side of the power body;

[0019] Figure 3 This is a schematic diagram of the structure in which the outer shell is arranged outside the muffler body;

[0020] Figure 4 It is a schematic diagram of the structure of the muffler body, the air guide cover and the air guide plate;

[0021] Figure 5 It is a structural schematic diagram of the air guide cover;

[0022] Figure 6 Schematic diagram of the exhaust pipe structure;

[0023] Figure 7 is a partial schematic diagram of the exhaust pipe;

[0024] Figure 8 It is a cross-sectional schematic diagram of the cooling airflow flowing into the air guide cavity and the exhaust pipe;

[0025] Figure 9 is a cross-sectional schematic diagram of the cooling airflow flowing from the first air duct into the second air duct;

[0026] Reference numerals:

[0027] 10. Power body; 11. First air duct; 20. Muffler body; 21. Exhaust pipe; 22. Air inlet; 23. Baffle; 24. Movable groove; 25. First side; 26. Second side; 30. Air guide cover; 31. First air outlet; 41. Air inlet; 42. Air guide cavity; 43. Exhaust gap; 44. Second air duct; 50. Air guide tube; 60. Casing; 61. Second air outlet; 70. Air guide plate; 80. Connecting pipe. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0032] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] like Figure 1-9As shown, in one embodiment of the present invention, an exhaust cooling system is provided, comprising a power body 10, a muffler body 20 and an air guide cover 30. A first air duct 11 is provided in the power body 10, the muffler body 20 is mounted on the power body 10, and an exhaust pipe 21 is provided on the side of the muffler body 20 facing away from the power body 10. The air guide cover 30 is mounted on the muffler body 20, and a communicating air inlet 41 and an air guide cavity 42 are formed between the air guide cover 30 and the muffler body 20. The air inlet 41 is close to the air outlet end of the first air duct 11. The air guide cover 30 is provided with a first air outlet 31 for the exhaust pipe 21 to extend into. An exhaust gap 43 is formed between the first air outlet 31 and the exhaust pipe 21, and the exhaust gap 43 is connected to the air guide cavity 42.

[0035] The cooling airflow drawn in by the impeller (not shown) cools the cylinder head of the power unit 10 as it flows through the first air duct 11. A portion of the airflow that has cooled the cylinder head of the power unit 10 is blown directly toward the muffler body 20, thereby cooling the muffler body 20. Another portion of the cooling airflow flows toward the air inlet 41 and into the air guide cavity 42 from there. The cooling airflow within the air guide cavity 42 not only cools the surface of the muffler body 20 but also cools the exhaust pipe 21. Finally, the airflow within the air guide cavity 42 is discharged through the exhaust gap 43.

[0036] This embodiment discloses an exhaust cooling system, which, by designing an air guide hood 30 on the muffler body 20, cools the cylinder head of the power main body 10. After entering the air guide cavity 42, the airflow not only cools the muffler body 20, but also cools the exhaust pipe 21, thereby reducing the exhaust pipe 21 and its exhaust temperature. At the same time, because the exhaust pipe 21 is arranged in the first exhaust port 31, the airflow in the air guide cavity 42 will flow out from the exhaust gap 43 along the surface of the exhaust pipe 21. Therefore, the airflow will continue to remove heat from the surface of the exhaust pipe 21 during the exhaust process, thereby further reducing the exhaust temperature (can be reduced to about 450°C) and improving the safety of the engine.

[0037] In one embodiment, the exhaust pipe 21 is provided with four air inlet holes 22, which are located within the air guide cavity 42 and arranged in a circular array along the axis of the exhaust pipe 21. Because the exhaust gas flows faster through the exhaust pipe 21 than within the air guide cavity 42, a portion of the cooling air within the air guide cavity 42 is drawn into the exhaust pipe 21 through the air inlet holes 22 as it flows toward the exhaust pipe 21. There, it mixes with the exhaust gas within the exhaust pipe, thereby lowering the temperature of the exhaust gas and achieving the purpose of reducing the exhaust temperature. The airflow that does not enter the exhaust pipe 21 flows out along the surface of the exhaust pipe 21, thereby cooling the exhaust pipe 21.

[0038] In one embodiment, a baffle 23 is provided within the air inlet 22. The baffle 23 extends along the length of the exhaust pipe 21, and the end of the baffle 23 away from the muffler body 20 is inclined toward the axis of the exhaust pipe 21. The baffle 23 is designed to block exhaust gas from the exhaust pipe 21, thereby preventing the exhaust gas from flowing from the air inlet 22 into the air guide cavity 42. Only the airflow within the air guide cavity 42 enters the exhaust pipe 21.

[0039] In one embodiment, a recessed groove 24 is formed on the side wall of the muffler body 20 located within the air guide cavity 42, and the exhaust pipe 21 is fixed in the recessed groove 24. The design of the recessed groove 24 facilitates the opening of the air inlet 22 in the exhaust pipe 21 while ensuring the length of the exhaust pipe 21, without causing the exhaust pipe 21 to extend excessively outward.

[0040] In one embodiment, an air guide tube 50 is fixed to the side of the air guide cover 30 facing away from the muffler body 20. The air guide tube 50 is in communication with the first exhaust port 31. The exhaust pipe 21 extends into the air guide tube 50, forming an exhaust gap 43 between the exhaust pipe 21 and the air guide tube 50. The design of the air guide tube 50 can extend the length of the exhaust gap 43 in the axial direction of the air guide tube 50, thereby extending the flow path of the airflow in the exhaust gap 43, thereby improving the cooling effect on the exhaust pipe.

[0041] In one embodiment, a shell 60 is provided on the power body 10, and the shell 60 cover is arranged outside the muffler body 20 and the air guide cover 30. A second air duct 44 is formed between the shell 60 and the muffler body 20, and a second air outlet 61 connected to the second air duct 44 is provided on the shell 60. The first air outlet 31 and the exhaust pipe 21 are both arranged in the second air outlet 61. The airflow discharged from the first air duct 11 will directly enter the second air duct 44. A part of the airflow entering the second air duct 44 will cool the surface of the muffler body 20 and finally be discharged from the second air outlet 61. The other part of the airflow will flow into the air guide cavity 42. The working principle of this part of the airflow has been explained in the above embodiment and will not be repeated here. By designing the shell 60, the cooling airflow discharged from the first air duct 11 can be fully utilized to improve the cooling effect on the muffler body 20. At the same time, it can also play a protective role for the muffler body 20 and improve safety.

[0042] In one embodiment, the muffler body 20 has a first side 25 and a second side 26 that are opposite each other, and the air inlet 41 is located on the first side 25. A deflector plate 70 is provided within the second air duct 44. The deflector plate 70 is located between the air inlet 41 and the outlet end of the first air duct 11. The deflector plate 70 is used to direct the airflow discharged from the outlet end of the first air duct 11 toward the second side 26. Specifically, the deflector plate 70 is fixed to the muffler body 20, with one end of the deflector plate 70 tilted toward the outlet end of the first air duct 11. Under the guiding effect of the deflector plate 70, a portion of the cooling airflow discharged from the first air duct 11 can be directed toward the second side 26, thereby improving the cooling effect on the muffler body 20.

[0043] In one embodiment, the power main body 10 is provided with a connecting pipe 80, the ends of which are respectively connected to the muffler body 20 and the cylinder head of the power main body 10. The connection between the connecting pipe 80 and the muffler body 20 is close to the air inlet 41. As the cooling air flows toward the air inlet 41, it removes some heat from the connecting pipe 80, thereby reducing the intake temperature of the muffler body 20.

[0044] This embodiment also provides an engine including the above-mentioned exhaust cooling system. Due to the use of the above-mentioned exhaust cooling system, it has the same working principle and technical effects as the exhaust cooling system in the above-mentioned embodiment, which will not be described in detail here.

[0045] In the specification of the present invention, a large number of specific details are described. However, it is understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An exhaust cooling system, characterized in that: include: The power body (10) is provided with a first air duct (11); A muffler body (20) is provided on the power body (10), and an exhaust pipe (21) is provided on a side of the muffler body (20) facing away from the power body (10); and An air guide cover (30) is provided on the muffler body (20); an air inlet (41) and an air guide cavity (42) are formed between the air guide cover (30) and the muffler body (20); the air inlet (41) is close to the air outlet end of the first air duct (11); a first air outlet (31) for the exhaust pipe (21) to extend into is provided on the air guide cover (30); an air exhaust gap (43) is formed between the first air outlet (31) and the exhaust pipe (21); and the air exhaust gap (43) is communicated with the air guide cavity (42).

2. The exhaust cooling system according to claim 1, characterized in that: At least one air inlet hole (22) is provided on the exhaust pipe (21), and the air inlet hole (22) is located in the air guide cavity (42).

3. The exhaust cooling system according to claim 2, characterized in that: A baffle (23) is provided in the air inlet (22), and the baffle (23) extends along the length direction of the exhaust pipe (21). The end of the baffle (23) away from the muffler body (20) is inclined toward the axis of the exhaust pipe (21).

4. The exhaust cooling system according to claim 3, characterized in that: A recessed groove (24) is formed on the side wall of the muffler body (20) located in the air guide cavity (42), and the exhaust pipe (21) is arranged in the recessed groove (24).

5. The exhaust cooling system according to claim 1, characterized in that: An air guide tube (50) is provided on the air guide cover (30), the air guide tube (50) is communicated with the first air outlet (31), the exhaust pipe (21) extends into the air guide tube (50), and the exhaust gap (43) is formed between the exhaust pipe (21) and the air guide tube (50).

6. The exhaust cooling system according to claim 1, characterized in that: The power body (10) is provided with a shell (60), and the shell (60) is arranged outside the muffler body (20) and the wind guide cover (30); a second air duct (44) is formed between the shell (60) and the muffler body (20), and the shell (60) is provided with a second air outlet (61) connected to the second air duct (44), and the first air outlet (31) and the exhaust pipe (21) are both arranged in the second air outlet (61).

7. The exhaust cooling system according to claim 6, characterized in that: The muffler body (20) has a first side (25) and a second side (26) opposite to each other, and the air inlet (41) is provided on the first side (25); An air guide plate (70) is provided in the second air duct (44), and the air guide plate (70) is provided between the air inlet (41) and the air outlet end of the first air duct (11), and the air guide plate (70) is used to guide the airflow discharged from the air outlet end of the first air duct (11) to the second side (26).

8. The exhaust cooling system according to claim 7, characterized in that: The air guide plate (70) is provided on the muffler body (20), and one end of the air guide plate (70) is inclined toward the air outlet end of the first air duct (11).

9. The exhaust cooling system according to claim 1, characterized in that: The power body (10) is provided with a connecting pipe (80), the two ends of which are respectively connected to the muffler body (20) and the cylinder head of the power body (10), and the connection between the connecting pipe (80) and the muffler body (20) is close to the air inlet (41).

10. An engine, characterized in that: The exhaust cooling system comprises the exhaust cooling system according to any one of claims 1 to 9.

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