CN220979633U - Exhaust elbow of diesel engine - Google Patents

Abstract

The utility model discloses a diesel engine exhaust elbow, which belongs to the field of diesel engines and comprises an exhaust elbow pipe body and connecting ends arranged at two ends of the exhaust elbow pipe body, wherein horn interfaces are respectively welded at the connecting ends of the exhaust elbow pipe body, the horn interfaces are connected with flanges, the horn interfaces are inserted in the connecting ends, and the inner edges of ports of the connecting ends and the outer walls of the horn interfaces linearly intersect along the circumference to form welding seams. The exhaust elbow adopts a split structure, can meet the use requirements under different working conditions, saves time, labor and materials, and greatly saves the production cost.

Description

Exhaust elbow of diesel engine

Technical Field

The utility model belongs to the field of diesel engines, and particularly relates to an exhaust elbow of a diesel engine.

Background

The exhaust elbow of the diesel engine is a pipe fitting for connecting the exhaust pipe and the supercharger, the middle part of the exhaust elbow is a pipe body, and the joint of the two ends is a bell mouth structure. The existing foreign exhaust bent pipe adopts an integrated forming structure, namely after the pipe fitting is bent and formed, two ends of the bent pipe fitting are processed into two-end bell mouth structures through a special expansion die. Under the periodic action of high-temperature and high-flow-rate combustion waste gas, the integrally formed exhaust bent pipe has good firmness and stability, but the bent pipe structure needs a special expansion die. Along with the continuous derivatization and the growing of product types, the types of the exhaust bent pipes are more and more, and under different working conditions, the exhaust bent pipes with different sizes and shapes need different expansion dies, so that the integral forming of the exhaust bent pipes is not practical and economical through manufacturing various dies.

Therefore, a novel exhaust elbow which can meet the use requirements under different working conditions and has higher firmness and stability is urgently needed.

Disclosure of utility model

In order to solve the technical problems, the utility model aims to provide the diesel engine exhaust elbow, which meets the use requirements under different working conditions while meeting the stability and the firmness.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

The utility model provides a diesel engine exhaust return bend, includes the exhaust return bend body and establishes the link at exhaust return bend body both ends, the link of exhaust return bend body has welded the loudspeaker interface respectively, the loudspeaker interface is pegged graft in the link, the inner edge of link port and the outer wall of loudspeaker interface form the welding seam along the circumference linearity intersection, be connected with the flange on the loudspeaker interface.

The technical scheme of the utility model is further improved as follows: the horn interface comprises a horn-shaped flaring and an inserting part integrally formed with the horn-shaped flaring, the inner diameter and the outer diameter of the inserting part are gradually reduced along the axial direction, and the outer wall of the inserting part and the inner edge of the connecting end port linearly intersect along the circumference to form a fillet weld.

The technical scheme of the utility model is further improved as follows: the maximum outer diameter of the plug-in connection part is the same as the outer diameter of the exhaust elbow pipe body.

The technical scheme of the utility model is further improved as follows: the outer diameter of one half of the plug-in part is the same as the inner diameter of the exhaust elbow pipe body.

The technical scheme of the utility model is further improved as follows: the inner diameter of the plug-in part is not less than 40+0.2mm.

The technical scheme of the utility model is further improved as follows: the exhaust elbow pipe body is L-shaped or U-shaped or space bent.

By adopting the technical scheme, the utility model has the following technical progress:

The exhaust elbow is manufactured by adopting a split structure, so that the related exhaust elbow can meet the use requirements under different working conditions, an expansion die is avoided, and meanwhile, the connection mode between the exhaust elbow pipe body and the horn interface adopts fillet weld connection, so that the exhaust elbow pipe body has higher firmness and stability while guaranteeing the exhaust capacity, and the related exhaust elbow can resist the stress caused by thermal expansion displacement generated by an exhaust system of a diesel engine to a certain extent under the periodical action of high-temperature and high-flow-rate combustion exhaust gas, and can still meet the use requirements under the complex working condition of the diesel engine after power reinforcement.

Drawings

FIG. 1 is a block diagram of an exhaust elbow of the present utility model;

FIG. 2 is a schematic illustration of the installation of a horn interface and connection end;

The pipe comprises a pipe body of an exhaust elbow, a pipe body of the exhaust elbow, a flange, a connecting end, a horn interface, a welding seam, a horn-shaped flaring, a connecting part and a splicing part, wherein the pipe body of the exhaust elbow, the flange, the connecting end, the horn interface, the horn-shaped flaring and the splicing part are arranged in sequence, and the connecting end, the horn-shaped flaring and the splicing part are arranged in sequence.

Detailed Description

For a better understanding of the utility model with its objects, structures and functions, reference should be made to the following detailed description of the utility model taken in conjunction with the accompanying drawings and examples in which:

As shown in fig. 1, a diesel engine exhaust elbow is connected between an exhaust pipe and a supercharger, the exhaust elbow comprises an exhaust elbow pipe body 1, and two ends of the exhaust elbow pipe body 1 are respectively provided with a connecting end 3 for welding with a horn interface 4. The horn interface 4 is connected with the flange 2, the horn interface 4 comprises a horn-shaped flaring 6 and an inserting connection part 7, and the inserting connection part 7 is connected with the connecting end 3 in a welding mode. Because the exhaust elbow adopts split type structure in the manufacturing process, uses fillet weld to link together, consequently can satisfy the operation requirement under the different operating modes, according to the operation requirement with exhaust elbow body and loudspeaker interface welding together, both labour saving and time saving and cost saving.

In order to facilitate the plugging, the plugging portion 7 is subjected to pre-necking processing, so that the inner diameter and the outer diameter of the plugging portion 7 are gradually reduced along the axial direction, and the maximum outer diameter of the plugging portion 7 is the same as the outer diameter of the exhaust elbow pipe body 1. Preferably, the outer diameter of the socket 7 at one half is the same as the inner diameter of the exhaust elbow pipe body 1. Meanwhile, in order to reduce the exhaust gas resistance and ensure the exhaust gas quantity, the inner diameter of the plugging portion 8 is calculated to obtain a proper size, and in this embodiment, the minimum inner diameter of the plugging portion 8 needs to be above 40+0.2mm.

As shown in fig. 2, the horn interface 4 is inserted into two connecting ends 3 of the exhaust elbow pipe body 1 in a plugging manner, the inner edges of the ports of the connecting ends 3 are just connected with the outer wall surface of the horn interface 4, and the connected intersecting line is a fillet weld to be welded. Therefore, even if the exhaust elbow pipe adopts a split structure, the whole structure can have higher strength and stability, and can be welded by using argon arc welding.

The shape of the exhaust elbow pipe body 1 is not limited, and may be L-shaped or U-shaped, or a space bending shape.

It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (6)

1. The utility model provides a diesel engine exhaust return bend, includes exhaust return bend body (1) and establishes link (3) at exhaust return bend body (1) both ends, its characterized in that: the connecting end (3) of the exhaust elbow pipe body is welded with a horn interface (4) respectively, the horn interface (4) is inserted into the connecting end (3), the inner edge of the port of the connecting end (3) and the outer wall of the horn interface (4) linearly intersect along the circumference to form a welding seam (5), and the horn interface (4) is connected with a flange (2).

2. A diesel exhaust elbow according to claim 1, wherein: the horn interface (4) comprises a horn-shaped flaring (6) and a splicing part (7) integrally formed with the horn-shaped flaring, the inner diameter and the outer diameter of the splicing part (7) are gradually reduced along the axial direction, and the outer wall of the splicing part (7) and the inner edge of a port of the connecting end (3) linearly intersect along the circumference to form a fillet weld.

3. A diesel exhaust elbow according to claim 2, wherein: the maximum outer diameter of the plug-in connection part (7) is the same as the outer diameter of the exhaust elbow pipe body (1).

4. A diesel exhaust elbow according to any one of claims 2 or 3, wherein: the outer diameter of one half of the plug-in connection part (7) is the same as the inner diameter of the exhaust elbow pipe body (1).

5. A diesel exhaust elbow according to claim 4, wherein: the inner diameter of the plug-in part (7) is not smaller than 40+0.2mm.

6. A diesel exhaust elbow according to claim 1, wherein: the exhaust elbow pipe body (1) is L-shaped, U-shaped or space bent.