Novel exhaust pipe

Abstract

The utility model relates to the technical field of exhaust pipes, in particular to a novel exhaust pipe which comprises an exhaust pipe body, the exhaust pipe body comprises a plurality of air inlets and an exhaust port, the air inlets are connected with the exhaust port through connecting pipes, and a thermal stress homogenizing device is arranged between every two adjacent air inlets. The thermal stress homogenizing device comprises a transition connecting plate arranged between the roots of the two adjacent connecting pipes, and the transition connecting plate and the exhaust pipe body are made of the same material, so that the thermal stress of the exhaust pipe body can be dispersed and homogenized, and the anti-cracking stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust pipe design and manufacturing, in particular to an exhaust pipe with a new structure. Background Art

[0002] The exhaust manifold of a natural gas internal combustion engine is a critical QTANi35Si5Cr2 cast iron component for high-power engines. It operates in harsh environments and has a complex structure. During use, the exhaust manifold is wrapped with thermal insulation to reduce heat radiation from the exhaust manifold, thereby lowering the ambient temperature in the engine compartment. This presents a promising application. However, the exhaust temperature of a natural gas engine is very high, reaching 780°C, and the thermal insulation hinders heat dissipation. Therefore, the exhaust pipe is always under high load during use, resulting in severe fracture defects and failing to meet customer requirements. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a new exhaust pipe.

[0004] The utility model is realized through the following technical solutions: a new exhaust pipe, comprising an exhaust pipe body, wherein the exhaust pipe body comprises a plurality of air inlets and an exhaust port, wherein the air inlets are connected to the exhaust ports through connecting pipes, and a thermal stress equalization device is arranged between two adjacent air inlets, wherein the thermal stress equalization device comprises a transition connecting plate arranged between the roots of two adjacent connecting pipes, and the transition connecting plate is made of the same material as the exhaust pipe body.

[0005] Furthermore, the transition connecting plate is an arc-shaped plate, and there is an arc transition between the transition connecting plate and the connecting pipe.

[0006] Furthermore, the transition connecting plate and the connecting pipe are integrally formed.

[0007] Furthermore, a rib plate is provided between the ends of two adjacent connecting pipes, and the rib plate is configured as a flat plate. The side of the rib plate is connected to the transition connecting plate and the connecting pipe through a gradual connector, and the thickness of the gradual connector gradually increases from the side close to the rib plate to the side away from the rib plate.

[0008] Furthermore, the gradual connector is integrally formed with the rib plate, transition connecting plate, and connecting pipe.

[0009] Furthermore, there is an arc transition between the gradual connector and the rib plate, transition connecting plate, and connecting pipe.

[0010] Furthermore, an air inlet flange is integrally formed at the end of the connecting pipe, and the gradual connector is connected to the air inlet flange.

[0011] The beneficial effect of the present invention is that a thermal stress equalization device is provided between two adjacent air inlets, and the thermal stress equalization device includes a transition connecting plate provided between the roots of two adjacent connecting pipes. The transition connecting plate is made of the same material as the exhaust pipe body, thereby being able to disperse and equalize the thermal stress of the exhaust pipe body and improve the anti-cracking stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of Example 1.

[0013] Among them: 1. Exhaust pipe body; 2. Exhaust port; 3. Connecting pipe; 4. Inlet flange; 5. Transition connecting plate; 6. Rib plate; 7. Gradual connector; 8. EGR connecting port; 9. Connecting flange. DETAILED DESCRIPTION

[0014] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0015] 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 embodiments described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0016] Example 1

[0017] like Figure 1 As shown, a new exhaust pipe includes an exhaust pipe body 1, the exhaust pipe body 1 includes multiple air inlets and an exhaust port 2, the air inlets are connected to the cylinder block of the engine, the air inlets are connected to the exhaust port 2 through a connecting pipe 3, and a thermal stress equalization device is provided between two adjacent air inlets. The thermal stress equalization device includes a transition connecting plate 5 distributed between the roots of two adjacent connecting pipes 3. The transition connecting plate 5 is made of the same material as the exhaust pipe body 1. Specifically, the transition connecting plate 5 is an arc-shaped plate, and there is an arc transition between the transition connecting plate 5 and the connecting pipe 3, thereby avoiding stress concentration caused by sharp angle transition.

[0018] A rib plate 6 is connected between the ends of two adjacent pipes 3. The rib plate 6 is flat. The side of the rib plate 6 is connected to the transition connecting plate 5 and the pipe 3 through a gradual connector 7. The thickness of the gradual connector 7 gradually increases from the side close to the rib plate 6 to the side away from the rib plate 6, thereby making a circular arc transition between the gradual connector 7 and the rib plate 6, the transition connecting plate 5, and the pipe 3. The rib plate 6 can connect multiple pipes 3, thereby transferring vibration and heat between the multiple pipes 3, thereby weakening the temperature and vibration differences between the pipes 3 and improving the service life of the exhaust pipe.

[0019] An air inlet flange 4 is integrally formed at the end of the connecting pipe 3, and the gradual connector 7 is connected to the air inlet flange 4. The outer diameter of the air inlet flange 4 is larger than the outer diameter of the connecting pipe 3, and the air inlet flange 4 has a higher strength. The gradual connector 7 is connected to the air inlet flange 4, thereby transferring stress to the air inlet flange 4.

[0020] In this embodiment, the exhaust pipe body 1, the connecting pipe 3, the air inlet flange 4, the transition connecting plate 5, the rib plate 6, the gradual connector 7, the EGR connecting port 8, and the connecting flange 9 are all integrally cast and made of the same material, which is more stable during the temperature and vibration transmission process, thereby ensuring the crack resistance.

[0021] In addition, since the overall thickness of the transition connecting plate 5 and the gradual connecting body 7 is relatively thick, a cooling cavity can be reserved during casting, and then connected to water cooling or air cooling, thereby reducing the exhaust pipe temperature and increasing the service life of the exhaust pipe.

[0022] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel exhaust pipe, comprising an exhaust pipe body, wherein the exhaust pipe body comprises a plurality of air inlets and an exhaust port, wherein the air inlets are connected to the exhaust ports via a connecting pipe, wherein: A thermal stress equalization device is provided between two adjacent air inlets. The thermal stress equalization device comprises a transition connecting plate provided between the roots of two adjacent pipes. The transition connecting plate is made of the same material as the exhaust pipe body.

2. The novel exhaust pipe according to claim 1, characterized in that: The transition connecting plate is an arc-shaped plate, and there is an arc transition between the transition connecting plate and the connecting pipe.

3. The novel exhaust pipe according to claim 1, characterized in that: The transition connecting plate and the connecting pipe are integrally formed.

4. The novel exhaust pipe according to claim 3, characterized in that: A rib plate is provided between the ends of two adjacent connecting pipes. The rib plate is arranged in a flat plate shape. The side of the rib plate is connected to the transition connecting plate and the connecting pipe through a gradual connector. The thickness of the gradual connector gradually increases from the side close to the rib plate to the side away from the rib plate.

5. The novel exhaust pipe according to claim 4, characterized in that: The gradual connector is integrally formed with the rib plate, the transition connecting plate and the connecting pipe.

6. The novel exhaust pipe according to claim 4, characterized in that: There is an arc transition between the gradual connector and the rib plate, transition connecting plate and connecting pipe.

7. The novel exhaust pipe according to claim 4, characterized in that: The end of the connecting pipe is integrally formed with an air inlet flange, and the gradual connector is connected to the air inlet flange.

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