ERG gas outlet pipe for EGR engine

Abstract

The utility model discloses an ERG (exhaust gas recirculation) gas outlet pipe for an EGR (exhaust gas recirculation) engine, which particularly relates to the technical field of tail gas exhaust and comprises a gas guide pipe main body, a waste gas collecting pipe arranged on one side of the outer end of the gas guide pipe main body, a gas outlet pipe arranged at one end of the gas guide pipe main body, a mounting support plate arranged on the outer side of the lower end of the gas outlet pipe, and a shunt pipe arranged on one side of the outer end face of the gas outlet pipe. A control valve body is arranged outside one end of the shunt pipe; and a threaded mounting hole is formed in the outer side of the upper end of the control valve body. When the ERG air outlet pipe is actually used, the waste gas collecting pipes, the mounting lug plates and the mounting sliding holes are correspondingly arranged, and the waste gas collecting pipes are arranged side by side, so that the size of the occupied space of the ERG air outlet pipe can be reduced; and meanwhile, the uniformity and smoothness of the gas guide pipe main body and the waste gas collecting pipe on waste gas guide can be effectively improved, and interference generated during flowing of waste gas in the waste gas collecting pipe and the waste gas guide pipe is avoided.

Description

Technical Field

[0001] This utility model relates to the field of exhaust technology, and more specifically, to an ERG exhaust pipe for an EGR engine. Background Technology

[0002] An EGR natural gas engine is an engine that uses natural gas as fuel and employs exhaust gas recirculation technology. Because natural gas has a high combustion temperature, it can cause significant knocking during combustion in the cylinder. By using exhaust gas recirculation (EGR) technology, the exhaust gas after combustion is introduced from the exhaust pipe into the intake system, which lowers the combustion temperature in the cylinder and thus reduces engine knocking. The exhaust gas intake scheme of the EGR system varies depending on the engine design. For example, patent CN211549824U discloses an exhaust pipe for an EGR natural gas engine, which includes an exhaust pipe body integrally cast with cavities machined within it. One end of the exhaust pipe body has four intake ports that communicate with the exhaust pipe and can be connected to the engine cylinder head exhaust passages. The intake ports are distributed in parallel with the exhaust pipe body, and each intake port has an exhaust pipe fixing hole. The other end of the exhaust pipe body has an outlet I at the top for connecting to the EGR connector and an outlet II at the bottom for connecting to the turbocharger. There are two EGR connector mounting holes machined on outlet I, and four turbocharger mounting holes machined on outlet II. The turbocharger mounting holes are smooth holes located on the bottom surface of the main body and are used to mount the turbocharger. The EGR connector mounting holes are threaded holes located on the top surface of the main body and are used to mount the EGR connector.

[0003] When in use, the above-mentioned device can effectively utilize the exhaust pulse of each cylinder to ensure that the exhaust gas enters the intake system continuously and stably, which is beneficial to ensuring the stability of engine operation. It fully considers the manufacturing process, strength and installation layout of surrounding components of the exhaust pipe. However, its structure is relatively complex, occupies a large space, and will increase the difficulty of its production and the cost of producing the exhaust pipe, thus reducing its applicability. At the same time, the exhaust gas inside adjacent exhaust pipes can easily cause interference during circulation, affecting the smoothness of exhaust gas emission. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides an ERG exhaust pipe for an EGR engine. The technical problem to be solved by this utility model is: how to increase the smoothness of exhaust gas emission and reduce the difficulty of exhaust pipe production.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an EGR exhaust pipe for an EGR engine, comprising an exhaust pipe body, an exhaust gas collection pipe on one side of its outer end, an exhaust pipe at one end of the exhaust pipe body, a mounting support plate on the outer side of the lower end of the exhaust pipe, a diverter pipe on one side of the outer end face of the exhaust pipe, and a control valve body on the outer side of one end of the diverter pipe.

[0006] The control valve body has a threaded mounting hole on the outer side of its upper end. The exhaust gas collection pipe has a mounting lug on the side away from the main body of the gas guide pipe. The mounting lug has a mounting sliding hole on its end face. The junction of the diverter pipe and the control valve body has a connecting lug. The connecting lug has a locking nut on the outer side of its end face.

[0007] In a preferred embodiment, there are multiple exhaust gas collection pipes, which are arranged in an array on both sides of the vertical central axis of the main body of the exhaust pipe in the top view direction, and the exhaust gas collection pipes are arranged in a curved state in the top view direction.

[0008] In a preferred embodiment, there are two mounting ears and two mounting sliding holes, and they are arranged in a mirror image on both sides of the transverse central axis in the main viewing direction of the exhaust gas collection pipe.

[0009] In a preferred embodiment, the diverter is arranged in a U-shape in the main viewing direction, and the control valve body is electrically connected to an external control device.

[0010] In a preferred embodiment, the number of threaded mounting holes is multiple, and they are arranged in an array on both sides of the vertical central axis in the top view of the control valve body.

[0011] In a preferred embodiment, the vent pipe is bent in the main view direction, and the vent pipe is in communication with the diverter pipe.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] In practical use, this invention, with its corresponding configuration of the exhaust gas collection pipe, mounting ear plate, and mounting sliding hole, allows for multiple exhaust gas collection pipes arranged side-by-side. This reduces the space occupied by the ERG exhaust pipe and effectively increases the uniformity and smoothness of exhaust gas flow between the main body of the guide pipe and the exhaust gas collection pipe. It also prevents interference during exhaust gas flow within the exhaust gas collection pipe and guide pipe, and reduces the manufacturing difficulty of the guide pipe and exhaust gas collection pipe. Furthermore, with the corresponding configuration of the splitter pipe and control valve body, the flow rate within the splitter pipe can be adjusted and controlled by the control valve body. This facilitates the splitting of exhaust gas within the exhaust pipe and allows it to be reintroduced into the engine intake manifold, mixing the exhaust gas with fresh air. This lowers the maximum combustion temperature of the mixture in the cylinder, thereby reducing the amount of nitrogen oxides generated. Attached Figure Description

[0014] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0015] Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the overall top view cross-sectional structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the main cross-sectional structure of the diversion pipe of this utility model.

[0019] The attached diagram is labeled as follows: 1. Main body of the air guide pipe; 2. Exhaust gas collection pipe; 3. Mounting lug; 4. Air outlet pipe; 5. Mounting support plate; 6. Mounting slide hole; 7. Diverter pipe; 8. Control valve body; 9. Threaded mounting hole; 10. Connecting lug; 11. Locking nut. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0021] This utility model provides an ERG exhaust pipe for an EGR engine, such as... Figure 1 and 2 As shown, it includes a main body 1 of the air guide pipe, a waste gas collection pipe 2 on one side of its outer end, an outlet pipe 4 at one end of the main body 1 of the air guide pipe, a mounting support plate 5 on the outer side of the lower end of the outlet pipe 4, and a diversion pipe 7 on one side of the outer end face of the outlet pipe 4.

[0022] The outside of one end of the diversion pipe 7 is provided with a control valve body 8. The exhaust gas collection pipe 2 is provided with a mounting ear plate 3 on the side away from the main body of the air guide pipe 1. The end face of the mounting ear plate 3 is provided with a mounting sliding hole 6. There are multiple exhaust gas collection pipes 2, which are arranged in an array on both sides of the vertical central axis in the top view of the main body of the air guide pipe 1. This allows the exhaust gas from different exhaust ports of the engine to be collected by multiple exhaust gas collection pipes 2, so that multiple exhaust gases are gathered inside the main body of the air guide pipe 1, thereby reducing the space occupied by the main body of the air guide pipe 1 and also reducing the difficulty of manufacturing the main body of the air guide pipe 1.

[0023] The exhaust gas collection pipe 2 is curved in the top view, which can increase the uniformity and smoothness of the exhaust gas flow. There are two mounting ears 3 and two mounting sliding holes 6, which are mirror images of each other on both sides of the transverse central axis in the main view of the exhaust gas collection pipe 2. This can also effectively increase the convenience of installing the exhaust gas collection pipe 2 with the engine.

[0024] The diverter pipe 7 is U-shaped in the main view direction, which allows for the convenient collection of some exhaust gas as it is discharged from the outlet pipe 4. This facilitates the reinjection of the exhaust gas into the engine's intake pipe, where it mixes with fresh air. The control valve body 8 is electrically connected to an external control device. The upper end of the control valve body 8 is connected to the engine's intake pipe via a threaded mounting hole 9 and a nut. The control valve body 8 allows for the adjustment and control of the exhaust gas flow rate inside the diverter pipe 7. The outlet pipe 4 is bent in the main view direction, and it is in communication with the diverter pipe 7.

[0025] like Figure 3 and 4As shown, a threaded mounting hole 9 is provided on the outer side of the upper end of the control valve body 8. A connecting lug 10 is provided at the joint between the diverter pipe 7 and the control valve body 8. A locking nut 11 is provided on the outer side of the end face of the connecting lug 10. There are multiple threaded mounting holes 9, which are arranged in an array on both sides of the vertical central axis in the top view direction of the control valve body 8.

[0026] Working principle of this utility model:

[0027] When using this utility model, the operator passes a bolt through the mounting hole 6 and connects the exhaust gas collection pipe 2 to multiple exhaust gas outlets of the engine, then locks it in place. Subsequently, the diversion pipe 7 and the control valve body 8 are locked in place using the locking nut 11 and the connecting lug 10. When the engine is running, the multiple exhaust gas outlets will guide the exhaust gas through the exhaust gas collection pipe 2 into the interior of the air guide pipe body 1, and then guide it to the outside through the exhaust pipe 4. When the exhaust gas is quickly guided to the outside from the exhaust pipe 4, some of the exhaust gas will be guided into the engine's intake pipe from the diversion pipe 7, where it will mix with the air inside the engine's intake pipe. Then, the operator will use an external control device to drive the control valve body 8 to work, and the control valve body 8 will adjust and control the exhaust gas flow rate inside the diversion pipe 7.

[0028] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An EGR exhaust pipe for an EGR engine, characterized in that, include: The main body of the air duct (1) has a waste gas collection pipe (2) on one side of its outer end. One end of the main body of the air duct (1) has an outlet pipe (4). The outer side of the lower end of the outlet pipe (4) has an installation support plate (5). One side of the outer end face of the outlet pipe (4) has a diversion pipe (7). One end of the diversion pipe (7) has a control valve body (8) on its outside. The upper outer side of the control valve body (8) is provided with a threaded mounting hole (9), the exhaust gas collection pipe (2) is provided with a mounting ear plate (3) on the side away from the main body of the gas guide pipe (1), the end face of the mounting ear plate (3) is provided with a mounting sliding hole (6), the fitting part of the diversion pipe (7) and the control valve body (8) is provided with a connecting ear plate (10), and the outer side of the end face of the connecting ear plate (10) is provided with a locking nut (11).

2. The EGR exhaust pipe for an EGR engine according to claim 1, characterized in that: The number of exhaust gas collection pipes (2) is multiple, and they are arranged in an array on both sides of the vertical central axis of the main body of the exhaust pipe (1) in the top view direction. The exhaust gas collection pipes (2) are arranged in a curved state in the top view direction.

3. The EGR exhaust pipe for an EGR engine according to claim 1, characterized in that: The number of mounting ear plates (3) and mounting sliding holes (6) are both two, and they are set in a mirror state on both sides of the transverse central axis in the main viewing direction of the exhaust gas collection pipe (2).

4. The EGR exhaust pipe for an EGR engine according to claim 1, characterized in that: The diverter (7) is U-shaped in the main view direction, and the control valve body (8) is electrically connected to the external control device.

5. The EGR exhaust pipe for an EGR engine according to claim 1, characterized in that: The number of threaded mounting holes (9) is multiple, and they are arranged in an array on both sides of the vertical central axis in the top view of the control valve body (8).

6. The EGR exhaust pipe for an EGR engine according to claim 1, characterized in that: The air outlet pipe (4) is bent in the main view direction, and the air outlet pipe (4) and the diversion pipe (7) are in a connected state.

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