CN217582283U

CN217582283U - Integral engine exhaust pipe

Info

Publication number: CN217582283U
Application number: CN202220738000.1U
Authority: CN
Inventors: 粟荣锦; 张振平; 宋路平
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-10-14
Anticipated expiration: 2032-03-31

Abstract

The embodiment of the application discloses an integral engine exhaust pipe for reducing exhaust gas leakage risk. The method in the embodiment of the application comprises the following steps: the system comprises an ERG system gas taking branch, a first exhaust gas inlet branch, a second exhaust gas inlet branch, a third exhaust gas inlet branch and an exhaust pipe; the third waste gas inlet branch is connected with the bottom of the EGR system gas taking branch; the second exhaust gas inlet branch is connected to the left side of the third exhaust gas inlet branch; the first exhaust gas inlet branch is connected to the rear side of the third exhaust gas inlet branch; the exhaust pipe is installed between the first exhaust gas intake branch and the second exhaust gas intake branch; the first waste gas inlet branch, the second waste gas inlet branch, the third waste gas inlet branch and the exhaust pipe are connected into a main pipe in a converging mode.

Description

Integral engine exhaust pipe

Technical Field

The embodiment of the application relates to the field of engines, in particular to an integral engine exhaust pipe.

Background

The engine exhaust pipe is an essential part of an engine and is used as a passage for exhaust gas in a cylinder to be exhausted, the reliability of the exhaust pipeline is particularly important, and the exhaust gas leakage at the joint of the exhaust pipeline becomes a main fault mode. Pollutants emitted by engines pollution of the engine to the environment is mainly from exhaust products. The main pollutants of gasoline engines are CO, NOx and HC, and the combustion of lead-containing gasoline also produces lead pollution. The most important exhaust pollutants for diesel engines are particulates and NO. Another major pollutant in engine exhaust is carbon dioxide, which is the major product of normal combustion, and although carbon dioxide is not toxic by itself, it is a major component responsible for the "greenhouse effect" and is therefore of great global interest.

Exhaust Gas generated by the engine may be reduced by Exhaust Gas Recirculation (EGR) in which a part of Exhaust Gas is separated after combustion of the internal combustion engine and introduced to the intake side for combustion again, by connecting the Exhaust Gas to an EGR Exhaust Gas Recirculation system through a pipe (method or method). The main purpose is to reduce nitrogen oxides (NOx) in exhaust gas and to improve fuel consumption rate when sharing partial load. Finally, the residual waste gas is discharged through an exhaust pipe.

Traditional blast pipe usually needs the multistage to be connected, seals through modes such as snap ring + gasket or sealed rope, nevertheless can't guarantee to have totally not leaked. The exhaust pipe is divided into a plurality of sections which are mutually connected, and the exhaust pipe is generally sealed by a clamping ring, a gasket or a sealing rope and the like, so that the risk of exhaust gas leakage exists; and the part quantity of traditional blast pipe is more increases, has improved the degree of difficulty such as assembly, maintenance, manufacturing.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an integral engine exhaust pipe, can reduce the waste gas and leak the risk.

The embodiment of the application provides an integral engine exhaust pipe, includes: the ERG system comprises an air taking branch, a first waste gas inlet branch, a second waste gas inlet branch, a third waste gas inlet branch and an exhaust pipe;

the third waste gas inlet branch is connected with the bottom of the EGR system gas taking branch;

the second exhaust gas inlet branch is connected to the left side of the third exhaust gas inlet branch;

the first exhaust gas inlet branch is connected to the rear side of the third exhaust gas inlet branch;

the exhaust pipe is installed between the first exhaust gas intake branch and the second exhaust gas intake branch;

the first waste gas inlet branch, the second waste gas inlet branch, the third waste gas inlet branch and the exhaust pipe are converged and connected into a header pipe.

Optionally, the one-piece engine exhaust pipe further comprises a first flange;

the first flange is mounted at the exhaust pipe orifice.

Optionally, the one-piece engine exhaust pipe further comprises a second flange;

the second flange is installed at the second exhaust gas inlet branch port.

Optionally, the one-piece engine exhaust pipe further comprises a third flange;

and the third flange is arranged at the third waste gas inlet branch port.

Optionally, the first flange, the second flange and the third flange are provided with at least two bolt holes for installing adaptive bolts.

Optionally, the one-piece engine exhaust pipe further includes a fourth flange;

the fourth flange is mounted to the bottom of the manifold.

Optionally, at least four bolt holes are formed in the fourth flange and used for installing adaptive bolts.

Optionally, an internal thread is arranged in the second exhaust gas inlet branch and is used for detachably connecting an external pipeline.

Optionally, the connection relationship among the first exhaust gas intake branch, the second exhaust gas intake branch, the third exhaust gas intake branch, the exhaust pipe and the EGR system gas taking branch is welding.

Optionally, the one-piece engine exhaust pipe further comprises a seal;

the sealing element is arranged at the gas taking branch port of the EGR system.

According to the technical scheme, the embodiment of the application has the following advantages: an ERG system gas taking branch, a waste gas inlet branch group and an exhaust pipe; the bottom of the gas taking branch of the EGR system is connected with the exhaust gas intake branch group; the exhaust pipe and the exhaust gas intake branch group are converged and connected into a main pipe. The integral exhaust pipe is used, so that the connection among pipelines can be reduced, the risk of waste gas leakage is reduced, the advantages of assembly, maintenance and manufacture are good, and the manufacturing cost is reduced.

Drawings

FIG. 1 is a schematic illustration of an exhaust pipe for an integral engine of the present application.

Detailed Description

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for explaining relative positional relationships between the respective members or components, and do not particularly limit the specific installation orientations of the respective members or components.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, the structures, the proportions, the sizes, and the like, which are illustrated in the accompanying drawings and described in the present application, are intended to be considered illustrative and not restrictive, and therefore, not limiting, since those skilled in the art will understand and read the present application, it is understood that any modifications of the structures, changes in the proportions, or adjustments in the sizes, which are not necessarily essential to the practice of the present application, are intended to be within the scope of the present disclosure without affecting the efficacy and attainment of the same.

The embodiment of the application provides an integral engine exhaust pipe which is used for reducing the risk of exhaust gas leakage. The exhaust pipe of the engine in this embodiment is an essential part in the operation of the engine, and the exhaust pipe will be described in detail in the following embodiments,

Referring to fig. 1, in an embodiment of the exhaust pipe of the integral engine of the present invention, an ERG system gas intake branch 1, a first exhaust gas intake branch 2, a second exhaust gas intake branch 3, a third exhaust gas intake branch 4, and an exhaust pipe 5 are provided;

the third waste gas 4 inlet branch is connected with the bottom of the EGR system gas taking branch 1;

the second waste gas 3 inlet branch is connected to the left side of the third waste gas inlet branch 4;

the first waste gas 2 inlet branch is connected with the rear side of the third waste gas inlet branch 4;

the exhaust pipe 5 is installed between the first exhaust gas intake branch 2 and the second exhaust gas intake branch 3;

the first exhaust gas inlet branch 2, the second exhaust gas inlet branch 3, the third exhaust gas inlet branch 4 and the exhaust pipe 5 are converged and connected into a header pipe.

In the embodiment, the engine is easy to generate exhaust gas in the working process, the main components in the exhaust gas are carbon dioxide, water, nitrogen and the like, the heat capacity of the carbon dioxide, the water, the nitrogen and the like is high, the maximum combustion temperature of the engine can be reduced by absorbing more heat in the combustion process, the generation of NO is inhibited, and the normal operation of the engine can be influenced by excessive exhaust gas in the circulation. Therefore, the engine is connected to an EGR system to recirculate exhaust gas, and after combustion, the engine separates a part of exhaust gas and introduces the separated exhaust gas to the intake side to be combusted again. In the exhaust gas recirculation, a part of exhaust gas is introduced into an air inlet pipe, mixed with fresh air or atomized mixture gas and then enters an engine cylinder for combustion.

As the main components in the exhaust gas are carbon dioxide (C02), water (H20), nitrogen (N2) and the like, the heat capacity of the exhaust gas is high, the maximum combustion temperature of the engine can be reduced by absorbing more heat in the combustion process, so that NO generation is inhibited, but the excessive exhaust gas can influence the normal operation of the engine in circulation, particularly, the performance of the engine can be obviously reduced by the recirculated exhaust gas in idling, low-speed and small-load and cold-state operation of the engine. This method is currently an effective measure for reducing the amount of exhaust emissions.

It will be appreciated that the engine recirculates exhaust gases after a portion of the exhaust gases have been introduced into the EGR system intake branch 1 via the exhaust gas intake branch, while another portion of the gases not used by the EGR system intake branch 1 is exhausted via the exhaust pipe 5. However, in the conventional implementation device, the intake branch 1, the exhaust gas intake branch and the exhaust pipe 5 of the EGR system are connected to each other in multiple sections by different components, and are generally sealed by means of snap rings, gaskets, sealing ropes or the like, so that in practical application, there is a risk of exhaust gas leakage. This device is through arranging for the pipeline of cooperation engine, and first waste gas intake branch 2 and second waste gas intake branch 3 in this integral transmitter blast pipe are connected respectively and are being divided 4 rear sides and left sides at this third waste gas intake, and blast pipe 5 is installed and is being divided 3 between first waste gas intake branch 2 and second waste gas intake, and EGR system gets gas branch 1 and is dividing 4 tops at the third waste gas intake. The first waste gas inlet branch 2, the second waste gas inlet branch 3, the third waste gas inlet branch 4 and the exhaust pipe 5 are converged and connected into a main pipe, so that the connection among parts is reduced, the risk of waste gas leakage can be reduced, and the economic benefit is improved.

Optionally, the one-piece engine exhaust pipe further comprises a first flange;

the first flange is mounted on the exhaust pipe orifice.

the second flange is mounted at the second exhaust gas inlet branch port.

Optionally, the one-piece engine exhaust pipe further comprises a third flange;

the third flange is arranged at the third waste gas inlet branch port.

Optionally, at least two bolt holes are arranged on the first flange, the second flange and the third flange, and are used for installing adaptive bolts.

Optionally, the exhaust pipe of the integral engine further comprises a fourth flange;

the fourth flange is mounted to the bottom of the manifold.

Optionally, the fourth flange is provided with at least four bolt holes for mounting adaptive bolts.

Because each pipeline needs to be connected with other pipelines of the engine, a flange is arranged at the joint and can be used for connecting two pipe ends in a sealing mode. Specifically, a first flange is arranged at the pipe orifice of the exhaust pipe 5, a second flange is arranged at the position of the second exhaust gas inlet branch 3, and a third flange is arranged at the position of the third exhaust gas inlet branch 4. And a fourth flange is arranged at the position of a main pipe formed by converging and connecting the exhaust pipe 5 and all the exhaust gas inlet branches.

In practical application, in order to connect the pipelines tightly, flange pads are added after the flanges are connected, and the first flange, the second flange and the third flange are fastened together through bolts, so that at least two bolt holes are formed in the first flange, the second flange and the third flange, and at least four bolt holes are formed in the fourth flange and used for installing adaptive bolts. In addition, the flange connection mode can be a plate type flat welding flange or a flat welding flange with a neck; the material of the flange may be carbon steel or stainless steel, and is not limited herein.

It should be noted that the flange gasket is placed between two flange sealing surfaces, and after the nut is tightened, the specific pressure on the gasket surface reaches a certain value, and then the gasket deforms, and fills up the unevenness on the sealing surfaces, so that the connection is tight and leakless. Flange connections are detachable connections which can be divided into vessel flanges and pipe flanges depending on the component to be connected.

Optionally, an internal thread is provided in the second exhaust gas inlet branch 3 for detachable connection to an external pipe.

Optionally, the connection relationship among the first exhaust gas intake branch 2, the second exhaust gas intake branch 3, the third exhaust gas intake branch 3, the exhaust pipe 4 and the EGR system gas taking branch 1 is welding.

Optionally, the exhaust pipe of the integral engine further comprises a sealing element;

the sealing element is arranged at the port of the gas taking branch 1 of the EGR system.

In this embodiment, the second exhaust gas intake branch 3 is connected to an exhaust gas pipe of the engine in a threaded manner, and an internal thread is provided in the second exhaust gas intake branch 3 and is detachably connected to an external pipe. The matching of the internal thread and the external thread is tight, so that the device is divided into a straight pipe and a taper pipe. The sealing element of the port of the gas taking branch 1 of the EGR system can be an O-shaped sealing ring, and can also be sealed by a clearance seal, and the sealing element is not limited in the specification.

The multi-section interchange connection among the traditional first waste gas inlet branch 2, the traditional second waste gas inlet branch 3, the traditional third waste gas inlet branch 4, the traditional exhaust pipe 5 and the traditional EGR system gas taking branch 1 in the integral engine exhaust pipe is improved to be a main pipe through the convergence connection in a welding mode, so that the exhaust gas leakage is reduced, and the material and the space of multi-pipeline connection are saved. The welding is a process for combining the workpiece and the workpiece by pressurizing or heating, and the process is not applicable to filling materials, and is a process for forming permanent connection when the material of the workpiece achieves the interatomic combination.

It should be noted that the above-mentioned disclosure and the detailed description are intended to demonstrate the practical application of the technical solutions provided in the present application, and should not be construed as limiting the scope of the present application. Various modifications, equivalent substitutions, or improvements may be made by those skilled in the art within the spirit and principles of the present application. The protection scope of this application is subject to the appended claims.

Claims

1. An integrated engine exhaust pipe, comprising: the EGR exhaust gas recirculation system comprises an air taking branch, a first exhaust gas intake branch, a second exhaust gas intake branch, a third exhaust gas intake branch and an exhaust pipe;

the third waste gas and waste gas inlet branch is connected with the bottom of the gas taking branch of the EGR waste gas recirculation system;

the first waste gas inlet branch, the second waste gas inlet branch, the third waste gas inlet branch and the exhaust pipe are connected into a main pipe in a converging mode.

2. The unitary engine exhaust pipe of claim 1 further comprising a first flange;

the first flange is installed at the pipe orifice of the exhaust pipe.

3. The unitary engine exhaust pipe of claim 2 further comprising a second flange;

the second flange is mounted at the pipe orifice of the second exhaust gas inlet branch.

4. The unitary engine exhaust pipe of claim 3 further comprising a third flange;

the third flange is arranged at the pipe orifice of the third waste gas inlet branch.

5. The unitary engine exhaust pipe of claim 4, wherein the first, second and third flanges are provided with at least two bolt holes for receiving adapted bolts.

6. The unitary engine exhaust pipe of claim 1 further comprising a fourth flange;

the fourth flange is mounted to the bottom of the manifold.

7. The unitary engine exhaust pipe of claim 6, wherein the fourth flange has at least four bolt holes for receiving adapted bolts.

8. The unitary engine exhaust pipe of claim 1, wherein internal threads are provided in the second exhaust gas intake branch for removable connection to an external pipe.

9. The exhaust unitary engine pipe according to claim 1, wherein a connection relationship between the first exhaust gas intake branch, the second exhaust gas intake branch, the third exhaust gas intake branch, the exhaust pipe, and the EGR system gas taking branch is welding.

10. The unitary engine exhaust pipe according to any one of claims 1 to 9, further comprising: a seal member;