Exhaust manifold

Abstract

The utility model discloses an exhaust manifold, including the first outer sleeve pipe and second outer sleeve pipe of outside, and the first inner tube and two second inner tubes of inside, it is characterized by: the first inner tube's end portion is formed with first flared mouth, one end of second inner tube is formed with second necking, the first flared mouth is inserted in second necking, the other end of second inner tube is formed with second flared mouth, two second inner tubes head -to -tail connection, second necking is sleeved on second flared mouth, the utility model solves the displacement or fracture of the current exhaust manifold under the condition of thermal expansion and cold shrinkage, through first inner tube and second inner tube insertion, adjacent second inner tube head -to -tail insertion, make the flared mouth and necking of adjacent inner tube insertion, and there is a gap between flared mouth and necking, avoid the displacement or fracture of pipeline after experiencing thermal expansion and cold shrinkage.

Description

Technical Field

[0001] This utility model relates to the field of exhaust pipe technology, specifically to exhaust manifolds. Background Technology

[0002] Existing exhaust manifolds are generally single-layer welded. At the bends in the pipe, heat accumulates when exhaust gas is discharged. The bends are prone to thermal expansion and contraction. Frequent thermal expansion and contraction can cause pipe displacement and breakage at the joints, affecting the pipe's sealing performance. Therefore, this exhaust manifold was designed to reduce the impact of thermal expansion and contraction on the exhaust manifold. Utility Model Content

[0003] The purpose of this utility model is to provide an exhaust manifold, which connects a first inner pipe and a second inner pipe, and connects adjacent second inner pipes end to end, so that the expansion and contraction ends of adjacent inner pipes are connected, and there is a gap between the expansion and contraction ends, thus preventing the pipe from shifting or breaking after experiencing thermal expansion and contraction.

[0004] This utility model provides the following technical solution: an exhaust manifold, including an outer first outer tube and a second outer outer tube, and an inner first inner tube and two second inner tubes, characterized in that: a first expansion port is formed on the end of the first inner tube, a second contraction port is formed on one end of the second inner tube, the first expansion port is inserted into the second contraction port, the other end of the second inner tube is formed with a second expansion port, the two second inner tubes are connected end to end, the second contraction port is sleeved on the second expansion port, and there is a gap between the expansion port and the contraction port.

[0005] In order to fix the first inner tube, the first outer tube is sleeved on the connected first inner tube and second inner tube. The lower end of the first inner tube is formed with a first inner tube, and the lower end of the first outer tube is formed with a first outer tube. The first outer tube is sleeved on the first inner tube.

[0006] In order to guide the exhaust gas, the first outer pipe is formed at the end of the first outer sleeve, and the first outer pipe and the first outer sleeve are perpendicular to each other to form a right-angle bend. The first inner pipe is also formed at the end of the first inner pipe, and the first inner pipe and the first inner pipe are perpendicular to each other to form a right-angle bend.

[0007] In order to fix one of the second inner tubes, the lower end of the first outer tube is also formed with a second outer tube. The second outer tube is located on one side of the first outer tube. The lower end of each of the second inner tubes is formed with a second inner tube. The second inner tube and the second inner tube are perpendicular to each other to form a tee. The second outer tube is sleeved on the outer surface of the second inner tube.

[0008] In order to fix another second inner tube, a third outer tube is formed at the lower end of the second outer tube. The third outer tube is perpendicular to the second outer tube to form a tee. The third outer tube is sleeved on the outer surface of the second inner tube.

[0009] To facilitate connection with the cylinder's exhaust port, connecting flanges are fitted and fixed to the outer end faces of the first, second, and third outer pipes.

[0010] To facilitate the connection between the first outer sleeve and the outer pipe, an expansion joint is fitted onto one end of the first outer sleeve, and a first flange is fitted onto the other end of the expansion joint.

[0011] In order to connect the second outer sleeve to the first outer sleeve, a second flange is inserted and fixed to one end of the second outer sleeve, and the second flange is connected to the first flange.

[0012] In order to connect the second outer sleeve to the outer pipe, an expansion joint is also fitted onto the other end of the second outer sleeve, and a first flange is fitted onto the other end of the expansion joint.

[0013] To prevent heat buildup that could damage the pipes, multiple heat dissipation holes are provided on the surfaces of both the first and second outer sleeves. The positions of these heat dissipation holes correspond to the connection points of the first, second, and third outer pipes. These heat dissipation holes form air ducts to dissipate heat at the connection points between the first and second inner pipes and the inner pipe.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are: (1) Connect the first inner tube and the second inner tube, and connect the ends of the adjacent second inner tubes so that the expansion and contraction ends of the adjacent inner tubes are connected, and there is a gap between the expansion and contraction ends, so as to avoid the pipe from shifting or breaking after thermal expansion and contraction. (2) The simultaneous expansion and contraction of the openings creates a double-walled connection between the inner tubes, which provides thermal insulation. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 This is a front view of the overall structure of this utility model; Figure 3 This is a cross-sectional view of the overall structure of this utility model; In the diagram: 1. First outer sleeve; 11. First outer pipe; 12. Second outer pipe; 2. Second outer sleeve; 3. Third outer pipe; 4. First flange; 5. Expansion joint; 6. Second flange; 7. First inner pipe; 71. First expansion joint; 72. First inner pipe; 8. Second inner pipe; 81. Second contraction joint; 82. Second expansion joint; 83. Second inner pipe; 9. Connecting flange. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1 to 3 The present invention provides a technical solution: an exhaust manifold, including an outer first outer tube 1 and a second outer outer tube 2, and an inner first inner tube 7 and two second inner tubes 8. The first outer tube 1 is fitted over the outer side of one of the first inner tubes 7 and the second inner tube 8, and the second outer tube 2 is fitted over the outer side of the other second inner tube 8. A first expansion port 71 is formed at the end of the first inner tube 7, and a second contraction port 81 is formed at one end of the second inner tube 8. The first expansion port 71 is inserted into the second contraction port 81, and a second expansion port 82 is formed at the other end of the second inner tube 8. The two second inner tubes 8 are connected end to end, and the second contraction port 81 is fitted over the second expansion port 82. The first expansion port 71 and the second contraction port 81 overlap and are fitted together. There is a gap between the expansion port and the contraction port. After thermal expansion and contraction, the pipe opening will not shift or break. At the same time, the double-layer pipe wall of the pipe opening has the effect of heat insulation.

[0018] The first outer sleeve 1 is fitted onto the connected first inner tube 7 and second inner tube 8. The lower end of the first inner tube 7 is formed with a first inner tube 72, and the lower end of the first outer sleeve 1 is formed with a first outer tube 11. The first outer tube 11 is fitted onto the outer surface of the first inner tube 72 to fix the first inner tube 7 inside the first outer sleeve 1.

[0019] like Figure 1 and 2 As shown, the first outer tube 11 is formed at the end of the first outer tube 1, and the first outer tube 11 and the first outer tube 1 are perpendicular to each other to form a right-angle bend. The first inner tube 72 is also formed at the end of the first inner tube 7, and the first inner tube 72 and the first inner tube 7 are perpendicular to each other to form a right-angle bend. The right-angle bend guides the gas. The diameter of the expansion port is smaller than the diameter of the contraction port. Under the pressure of the gas, the gas flows from the expansion port to the contraction port, reducing the leakage of gas.

[0020] The lower end of the first outer tube 1 is also formed with a second outer tube 12. The second outer tube 12 is located on one side of the first outer tube 11. The lower end of the second inner tube 8 is formed with a second inner tube 83. The second inner tube 83 and the second inner tube 8 are perpendicular to each other to form a tee. The second outer tube 12 is sleeved on the outer surface of the second inner tube 83 to fix the second inner tube 8 inside the first outer tube 1.

[0021] The lower end of the second outer tube 2 is formed with a third outer tube 3. The third outer tube 3 is perpendicular to the second outer tube 2 to form a tee. The third outer tube 3 is sleeved on the outer surface of the second inner tube 83 to fix another second inner tube 8 inside the second outer tube 2.

[0022] Connecting flanges 9 are fitted and fixed on the outer end faces of the first outer pipe 11, the second outer pipe 12 and the third outer pipe 3, so that the manifold can be easily connected to the exhaust cylinder through the connecting flanges 9.

[0023] An expansion joint 5 is fitted onto one end of the first outer sleeve 1, and a first flange 4 is fitted onto the other end of the expansion joint 5. A second flange 6 is inserted and fixed onto one end of the second outer sleeve 2. The second flange 6 and the first flange 4 are connected by bolts. A sealing gasket is placed inside the first flange 4 to seal between the first flange 4 and the second flange 6, thereby improving the sealing performance between the first outer sleeve 1 and the second outer sleeve 2.

[0024] An expansion joint 5 is also fitted onto the other end of the second outer sleeve 2, and a first flange 4 is fitted onto the other end of the expansion joint 5. The first flange 4 facilitates the connection of the second outer sleeve 2 to the outer pipe.

[0025] like Figure 1 and 2 As shown, multiple heat dissipation holes 10 are provided on the surface of the first outer tube 1 and the second outer tube 2. The positions of the heat dissipation holes 10 correspond to the connection points of the first outer tube 11, the second outer tube 12 and the third outer tube 3. The heat dissipation holes 10 are provided on the front and rear sides of the outer tube and form an air duct to dissipate heat at the connection points of the first inner tube 72, the second inner tube 83 and the inner tube, thereby reducing the heat accumulation at the first inner tube 72 and the second inner tube 83 during exhaust.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An exhaust manifold, comprising an outer first outer sleeve and a second outer sleeve, and an inner first inner sleeve and two second inner sleeves, characterized in that: The first inner tube has a first expansion opening formed at one end, and the second inner tube has a second contraction opening formed at one end. The first expansion opening is inserted into the second contraction opening, and the other end of the second inner tube has a second expansion opening. The two second inner tubes are connected end to end, and the second contraction opening is fitted onto the second expansion opening. There is a gap between the expansion opening and the contraction opening.

2. The exhaust manifold according to claim 1, characterized in that: The first outer sleeve is fitted onto the connected first inner tube and second inner tube. The lower end of the first inner tube is formed with a first inner tube, and the lower end of the first outer sleeve is formed with a first outer tube. The first outer tube is fitted onto the first inner tube.

3. The exhaust manifold according to claim 2, characterized in that: The first outer tube is formed at the end of the first outer tube, and the first outer tube and the first outer tube are perpendicular to each other to form a right-angle bend. The first inner tube is also formed at the end of the first inner tube, and the first inner tube and the first inner tube are perpendicular to each other to form a right-angle bend.

4. The exhaust manifold according to claim 2, characterized in that: The lower end of the first outer tube is also formed with a second outer tube, which is located on one side of the first outer tube. The lower end of the second inner tube is also formed with a second inner tube. The second inner tube and the second inner tube are perpendicular to each other to form a tee. The second outer tube is sleeved on the outer surface of the second inner tube.

5. The exhaust manifold according to claim 4, characterized in that: The lower end of the second outer tube is formed with a third outer tube, which is perpendicular to the second outer tube to form a tee, and the third outer tube is sleeved on the outer surface of the second inner tube.

6. The exhaust manifold according to claim 5, characterized in that: A connecting flange is fitted and fixed to the outer end face of the first, second, and third outer pipes.

7. The exhaust manifold according to claim 1, characterized in that: An expansion joint is fitted onto one end of the first outer sleeve, and a first flange is fitted onto the other end of the expansion joint.

8. The exhaust manifold according to claim 1, characterized in that: A second flange is inserted and fixed to one end of the second outer sleeve, and the second flange is connected to the first flange.

9. The exhaust manifold according to claim 8, characterized in that: An expansion joint is also fitted onto the other end of the second outer sleeve, and a first flange is fitted onto the other end of the expansion joint.

10. The exhaust manifold according to claim 5, characterized in that: Multiple heat dissipation holes are provided on the surface of both the first outer tube and the second outer tube. The positions of the heat dissipation holes correspond to the connection points of the first outer tube, the second outer tube and the third outer tube. The heat dissipation holes form air ducts to dissipate heat at the connection points of the first inner tube, the second inner tube and the inner tube.

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