Double-layer automobile exhaust manifold

Abstract

The utility model relates to the field of automobile parts, and discloses a double-layer automobile exhaust manifold which comprises a collecting pipe and a first connecting pipe fixed to the outer surface of the collecting pipe. The first middle pipe is fixed to the side, away from the collecting pipe, of the first connecting pipe. The first connecting pipe is fixed to the end, away from the first connecting pipe, of the first middle pipe. And the radiating fins are fixed on one surface of the manifold main body, and the radiating fins are integrally of a T-shaped structure. The two first manifold main bodies are arranged to be in the same shape, the two second manifold main bodies are designed to be in the same collision and equal in length, the manifold production difficulty and cost are reduced to a certain degree, the T-shaped cooling fins are fixed to the surfaces of the manifolds, heat absorption is conducted on the manifolds through the cooling fins, and therefore the overall heat dissipation area of the first manifold main bodies is increased, and the heat dissipation efficiency is improved. The heat dissipation efficiency of the first manifold body is improved, when the first manifold body collides, an external object makes contact with the cooling fins preferentially, the cooling fins can play a buffering role on the manifold body, and deformation of the first manifold body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a double-layer automobile exhaust manifold. Background Art

[0002] In the existing automobile engine exhaust system, the exhaust manifold is generally a thick and heavy steel casting or a stainless steel pipe. The exhaust manifold is connected to the three-way catalytic converter and the upstream oxygen sensor, and the connection is connected by flanges and bolts to form a tightly coupled integrated structure.

[0003] When the exhaust manifold is exhausting, the temperature of the exhaust manifold is very high. The exhaust manifold has no protective structure. When foreign objects hit the exhaust manifold, the exhaust manifold is easily damaged and deformed, which is not conducive to the use of the exhaust manifold. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a double-layer automobile exhaust manifold, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] The utility model discloses a double-layer automobile exhaust manifold, comprising a collecting pipe,

[0007] Connecting pipe 1, fixed on the outer surface of the collecting pipe;

[0008] The middle pipe 1 is fixed on the side of the connecting pipe 1 away from the collecting pipe;

[0009] A manifold body 1 is fixed to an end of the intermediate pipe 1 away from the connecting pipe 1;

[0010] The heat sink is fixed on a surface of the manifold body, and the heat sink is a T-shaped structure as a whole.

[0011] Furthermore, a connecting pipe 2 is fixed to one side of the collecting pipe, and the inner diameter and length of the connecting pipe 2 are equal to those of the connecting pipe 1.

[0012] Furthermore, a second intermediate tube is fixed to one end of the second connecting tube away from the collecting tube.

[0013] Furthermore, two sets of mutually symmetrical manifold bodies 2 are fixed to one end of the intermediate tube 2 away from the connecting tube 2.

[0014] Furthermore, a heat sink wound in a spiral shape is fixed on the surface of the manifold body 2.

[0015] Furthermore, connecting flanges are fixed to the ends of the manifold body 1 and the manifold body 2.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model sets two manifold main bodies 1 to have the same shape, and designs two manifold main bodies 2 to collide with each other in the same way and have equal lengths, which reduces the difficulty and cost of manifold production to a certain extent, and a T-shaped heat sink is fixed on the surface of the manifold, and the heat sink is used to absorb heat from the manifold, thereby increasing the overall heat dissipation area of ​​the manifold main body 1, which is beneficial to improving the heat dissipation efficiency of the manifold main body 1, and when the manifold main body 1 collides, external objects will contact the heat sink first, and the heat sink can provide a buffering effect for the manifold main body together, thereby reducing deformation of the manifold main body 1. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0019] Figure 2 It is a front view of the utility model;

[0020] Figure 3 It is a three-dimensional structural diagram of the manifold body 1 in the utility model;

[0021] Figure 4 It is a three-dimensional structural diagram of the manifold body 2 in the utility model;

[0022] Figure 5 It is a partial cross-sectional view of the manifold body 1 in the utility model;

[0023] The numbers in the figure represent: 1. collecting pipe; 2. connecting pipe 1; 3. intermediate pipe 1; 4. manifold body 1; 5. connecting flange; 6. heat sink; 7. connecting pipe 2; 8. intermediate pipe 2; 9. manifold body 2. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5, including a collecting pipe 1, a connecting pipe 2, which is fixed on the outer surface of the collecting pipe 1, and a through hole is opened at the position of the collecting pipe 1 corresponding to the end of the connecting pipe 2, so that the exhaust gas inside the connecting pipe 2 can enter the collecting pipe 1, and the inner diameter of the connecting pipe 2 is smaller than the collecting pipe 1; an intermediate pipe 3, which is fixed on the side of the connecting pipe 2 away from the collecting pipe 1, and the intermediate pipe 3 is funnel-shaped as a whole, and the end of the intermediate pipe 3 connected to the connecting pipe 2 is the smaller end; a manifold body 4, which is fixed on the end of the intermediate pipe 3 away from the connecting pipe 2, and the end of the manifold body 4 away from the intermediate pipe 3 is the air inlet, and the intermediate pipe The inner diameter of one end of the manifold body 13 near the manifold body 14 is larger than the inner diameter of the manifold body 14. The lengths, shapes and lengths of the two manifold bodies 14 are equal and symmetrically arranged. The two manifold bodies 14 are of the same design, which makes the manifold body 14 simpler to manufacture and more convenient to assemble. The two manifold bodies 14 are equal in length, which is beneficial to reducing the noise during exhaust. When the exhaust gas is squeezed into the manifold body 14 by the pressure of the piston, it enters the middle pipe 3 through the guidance of the manifold body 4. Since the inner diameter of the middle pipe 3 is larger than that of the manifold body 4, the squeezed gas enters the middle pipe 14. 3 will expand, the diameter of the gas will increase, and the piston will continue to move to squeeze the exhaust gas into the manifold body 4, so that the exhaust gas in the intermediate pipe 3 is pushed into the connecting pipe 2. After the gas enters the connecting pipe 2, negative pressure will be generated. The negative pressure formed in the connecting pipe 2 can suck out the next wave of exhaust gas. By combining the collecting pipe 1 with the exhaust pipe, negative pressure is generated in the exhaust pipe again, thereby improving the exhaust efficiency of the manifold; the heat sink 6 is fixed on the surface of the manifold body 4. The heat sink 6 is a T-shaped structure as a whole, and is arranged in a ring around the surface of the manifold body 4. The bottom of the heat sink 6 is connected to the exhaust pipe 2. The outer surface of the manifold body 4 is directly fixed, and the heat sink 6 is made of a metal material with good heat dissipation. When the temperature of the manifold body 4 rises, the heat sink 6 absorbs heat from the manifold body 4 through the position connected to the manifold body 4, thereby increasing the overall heat dissipation area of ​​the manifold body 4, which is beneficial to improving the heat dissipation efficiency of the manifold body 4. The heat sink 6 is fixed on the surface of the manifold body 4. When the manifold body 4 collides, external objects will contact the heat sink 6 first. The heat sink 6 can play a buffering role for the manifold body 4 and reduce the deformation of the manifold body 4.

[0026] A connecting pipe 27 is fixed to one side of the manifold 1, and the inner diameter and length of the connecting pipe 27 are equal to those of the connecting pipe 1. An intermediate pipe 28 is fixed to the end of the connecting pipe 27 away from the manifold 1, and the structure of the intermediate pipe 28 is the same as that of the intermediate pipe 13. Two sets of mutually symmetrical manifold bodies 29 are fixed to the end of the intermediate pipe 28 away from the connecting pipe 27. The manifold body 29 is located below the manifold body 14 and is staggered with the manifold body 14. Although the manifold body 29 is staggered with the manifold body 14, the total length is equal to that of the manifold body 14. Therefore, the lengths of the four manifolds are equal. When exhaust is performed through the manifold, the airflow inside the manifold is basically the same, and the sound of the airflow passing through the manifold is also relatively similar, so the noise generated when the manifold is exhausted can be reduced. A spirally wound heat sink 6 is fixed to the surface of the manifold body 2 9 , and the heat sink 6 is spirally fixed to the surface of the manifold body 2 9 , which can not only provide heat dissipation protection for the manifold body 2 9 , but also reduce the problem of cracks becoming larger when the manifold body 2 9 overheats and cracks.

[0027] Connecting flanges 5 are fixed to the ends of manifold body 1 4 and manifold body 2 9 .

[0028] Working principle, the exhaust gas enters the manifold through the air inlets of the manifold body 14 and the manifold body 29, and is continuously squeezed into the manifold body 14 (manifold body 29), and the gas flows into the intermediate pipe 13 (intermediate pipe 28). The gas expands after moving to a larger space, and enters the connecting pipe 12 (connecting pipe 27) under the squeezing of the subsequent exhaust gas. The gas is compressed again and a negative pressure is generated inside, which generates suction for the exhaust gas that subsequently enters the manifold body 4, thereby accelerating the discharge of the exhaust gas. When exhausting, the manifold body 14 and the manifold body 29 generate high temperature inside, and the heat sink 6 fixed on the surface of the manifold body 14 and the manifold body 29 can effectively absorb heat. After absorbing heat, the heat sink 6 dissipates heat through the surface, thereby improving the heat dissipation efficiency of the manifold body 4.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer automobile exhaust manifold, comprising a collecting pipe (1), It is characterized in that Also included are: A connecting pipe (2) is fixed on the outer surface of the collecting pipe (1); The intermediate pipe (3) is fixed to the side of the connecting pipe (2) away from the collecting pipe (1); A manifold body (4) is fixed to an end of the intermediate pipe (3) away from the connecting pipe (2); The heat sink (6) is fixed on the surface of the manifold body (4), and the heat sink (6) is a T-shaped structure as a whole.

2. A double-layer automobile exhaust manifold according to claim 1, characterized in that: A second connecting pipe (7) is fixed to one side of the collecting pipe (1), and the inner diameter and length of the second connecting pipe (7) are equal to those of the first connecting pipe (2).

3. A double-layer automobile exhaust manifold according to claim 2, characterized in that: An intermediate tube 2 (8) is fixed to one end of the connecting tube 2 (7) away from the collecting tube (1).

4. A double-layer automobile exhaust manifold according to claim 3, characterized in that: Two sets of mutually symmetrical manifold bodies (9) are fixed to one end of the intermediate tube (8) away from the connecting tube (7).

5. A double-layer automobile exhaust manifold according to claim 4, characterized in that: A heat sink (6) wound in a spiral shape is fixed on the surface of the manifold body 2 (9).

6. A double-layer automobile exhaust manifold according to claim 4, characterized in that: The ends of the manifold body 1 (4) and the manifold body 2 (9) are fixed with connecting flanges (5).

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