CN210122931U

CN210122931U - Exhaust manifold connection structure

Info

Publication number: CN210122931U
Application number: CN201920971446.7U
Authority: CN
Inventors: 李帅; 王勇强; 张凤丽; 王浩
Original assignee: Weichai Heavy Machinery Co Ltd
Current assignee: Weichai Heavy Machinery Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-03-03
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses an exhaust manifold connection structure relates to engine exhaust system technical field. The exhaust manifold connecting structure comprises a guide cylinder, a corrugated pipe and two sections of exhaust manifolds, wherein two ends of the guide cylinder are respectively inserted into the two exhaust manifolds, axial limiting structures are respectively arranged between the guide cylinder and the two exhaust manifolds, and the guide cylinder is arranged between the two axial limiting structures in a sliding manner; the corrugated pipe is sleeved outside the guide cylinder at intervals, and two ends of the corrugated pipe are fixedly connected with the two exhaust manifolds respectively. The utility model discloses exhaust manifold connection structure has improved joint strength between two sections exhaust manifold, has guaranteed engine exhaust system's leakproofness, has improved the output of engine.

Description

Exhaust manifold connection structure

Technical Field

The utility model relates to an engine exhaust system technical field, concretely relates to exhaust manifold connection structure.

Background

The exhaust manifold is usually of a segmented structure, and connecting structures such as expansion joints or sliding sleeves are used among pipelines to enhance the adjustability of the large-cylinder-diameter engine.

Fig. 4 shows a conventional exhaust manifold connection structure, in which a bellows 2 and a guide cylinder 1 are welded together, and both ends of the bellows 2 are fastened to an exhaust manifold 4 by clips 5, respectively. Such a connection structure has the following drawbacks:

firstly, the corrugated pipe 2 and the guide shell 1 are welded into a whole, and the guide shell 1 has thin pipe wall, weak bearing capacity and poor reliability;

if the external corrugated pipe 2 is broken, air leakage is caused at the joint of the two exhaust manifolds 4, turbocharging is influenced, and the output power of the engine is reduced;

thirdly, the guide shell 1 adopts a reducing structure, and in the process of circulating the waste gas from a large aperture to a small aperture, the sudden change of the internal sectional area of the guide shell 1 increases the discharge resistance of the waste gas, reduces the discharge speed of the waste gas, influences the turbocharging and reduces the output power of the engine.

SUMMERY OF THE UTILITY MODEL

To the above defect that prior art exists, the utility model provides an exhaust manifold connection structure, this exhaust manifold connection structure have improved joint strength between two sections exhaust manifold, have guaranteed engine exhaust system's leakproofness, have improved the output of engine.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the exhaust manifold connecting structure comprises a guide cylinder, a corrugated pipe and two sections of exhaust manifolds, wherein two ends of the guide cylinder are respectively inserted into the two exhaust manifolds, axial limiting structures are respectively arranged between the guide cylinder and the two exhaust manifolds, and the guide cylinder is arranged between the two axial limiting structures in a sliding manner; the corrugated pipe is sleeved outside the guide cylinder at intervals, and two ends of the corrugated pipe are fixedly connected with the two exhaust manifolds respectively.

The outer surface of the guide cylinder, which is in contact with the exhaust manifold, is a spherical surface.

The axial limiting structure comprises a limiting step arranged on the inner surface of the exhaust manifold, and the inner surface of the limiting step is flush with the inner surface of the guide cylinder.

The corrugated pipe comprises a corrugated section and straight sections connected to two ends of the corrugated section respectively, and the end parts of the straight sections are bent outwards to form flanges; the straight section is sleeved with a connecting flange, the connecting flange is located between the turned edge and the corrugated section, and the corrugated pipe is fixedly connected with the exhaust manifold through the connecting flange.

Wherein, flange with exhaust manifold passes through clamp fixed connection.

By adopting the technical scheme, the beneficial effects of the utility model are that:

the utility model provides an exhaust manifold connection structure owing to be connected bellows and draft tube with two sections exhaust manifold respectively, compares prior art and has following advantage:

the corrugated pipe and the guide cylinder are arranged in a split mode, the wall of the guide cylinder can be made thicker, higher internal pressure can be borne, the strength of a connecting structure is improved, and the reliability is good;

even if the external corrugated pipe has cracks, the internal guide cylinder can still ensure the sealing between the two sections of exhaust manifolds;

and the guide cylinder does not need to adopt a reducing structure, so that the processing procedures are reduced, the exhaust speed of waste gas can be ensured, the loss of exhaust energy is effectively reduced, and the output power of the engine is improved.

Because the outer surface of the guide cylinder, which is contacted with the exhaust manifold, is a spherical surface, the guide cylinder can freely rotate in multiple directions in the using process by adopting the structure, the compensation of radial dislocation between the two sections of exhaust manifolds is enhanced, the adjustability between the two sections of exhaust manifolds is enhanced, and the application range is enlarged.

Because the bellows includes the ripple section and connects the straight section at ripple section both ends respectively, the tip of straight section outwards buckles and forms the turn-ups, and flange is located between turn-ups and the ripple section, adopts such structure, need not the welding, has reduced manufacturing procedure, and the turn-ups can regard as seal gasket simultaneously, has reduced spare part.

Drawings

Fig. 1 is a schematic structural view of an exhaust manifold connection structure according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a schematic structural view of an exhaust manifold connecting structure in the prior art;

in the figure: the device comprises a guide cylinder 1, a guide cylinder 11, a spherical surface 2, a corrugated pipe 21, a corrugated section 22, a straight section 23, a flanging 3, a connecting flange 4, an exhaust manifold 41, a limiting step and a clamp 5.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 3, the exhaust manifold connection structure includes a guide cylinder 1, a bellows 2 and two exhaust manifolds 4, two ends of the guide cylinder 1 are respectively inserted into the two exhaust manifolds 4, axial limiting structures are respectively arranged between the guide cylinder 1 and the two exhaust manifolds 4, and the guide cylinder 1 is slidably arranged between the two axial limiting structures; the corrugated pipe 2 is sleeved outside the guide cylinder 1 at intervals, and two ends of the corrugated pipe 2 are respectively fixedly connected with the two sections of exhaust manifolds 4.

As shown in fig. 1 and fig. 2 together, in order to improve the exhaust smoothness of the engine, the guide cylinder 1 in this embodiment is preferably of a cylindrical structure, the inner surface is smooth, the outer surface of the guide cylinder 1 in contact with the exhaust manifold 4 is a spherical surface 11, and since the outer surfaces of the two ends of the guide cylinder 1 are spherical surfaces 11, the guide cylinder 1 can freely rotate in multiple directions, thereby enhancing the compensation of radial dislocation between the two exhaust manifolds 4, enhancing the adjustability between the two exhaust manifolds 4, and expanding the application range.

As shown in fig. 1 and fig. 2, the axial limiting structure in this embodiment includes a limiting step 41 disposed on the inner surface of the exhaust manifold 4, the limiting step 41 is an annular step, and in this embodiment, it is preferable that the inner surface of the limiting step 41 is flush with the inner surface of the guide cylinder 1. In practical application, the axial limiting structure can also be arranged on the outer surface of the guide shell 1 in a protruding manner, and the embodiment does not limit the axial limiting structure.

As shown in fig. 1 and fig. 3, the corrugated tube 2 in the present embodiment includes a corrugated section 21 and straight sections 22 respectively connected to two ends of the corrugated section 21, and ends of the straight sections 22 are bent outward to form flanges 23; the straight section 22 is sleeved with a connecting flange 3, the connecting flange 3 is located between the turned edge 23 and the corrugated section 21, and the corrugated pipe 2 is fixedly connected with the exhaust manifold 4 through the connecting flange 3. By adopting the structure, welding is not needed, the processing procedures are reduced, and meanwhile, the flanging 3 can be used as a sealing gasket, so that the number of parts is reduced.

As shown in fig. 1 and 3, the connection flange 3 and the exhaust manifold 4 in the present embodiment are fixedly connected by a clip 5. In practical application, the locking piece can also be used for connection.

When the corrugated pipe is used, two ends of the guide cylinder 1 are respectively inserted into the two sections of exhaust manifolds 4, and two ends of the corrugated pipe 2 are fixedly connected with the end parts of the two sections of exhaust manifolds 4 through the clamping hoop 5, so that the connection between the two sections of exhaust manifolds 4 can be completed.

According to the working process, the utility model discloses exhaust manifold connection structure easy operation, convenient to use has not only improved joint strength between two sections exhaust manifold 4, has guaranteed engine exhaust system's leakproofness, has improved the output of engine, has strengthened the controllability between two sections exhaust manifold 4 moreover, has enlarged application range.

The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without the labor of creation from the above conception, which falls within the protection scope of the present invention.

Claims

1. The exhaust manifold connecting structure comprises a guide cylinder, a corrugated pipe and two sections of exhaust manifolds, and is characterized in that,

two ends of the guide cylinder are respectively inserted into the two exhaust manifolds, axial limiting structures are respectively arranged between the guide cylinder and the two exhaust manifolds, and the guide cylinder is arranged between the two axial limiting structures in a sliding manner;

the corrugated pipe is sleeved outside the guide cylinder at intervals, and two ends of the corrugated pipe are fixedly connected with the two exhaust manifolds respectively.

2. The exhaust manifold connecting structure according to claim 1, wherein an outer surface of the guide cylinder, which contacts the exhaust manifold, is a spherical surface.

3. The exhaust manifold connection structure according to claim 1, wherein the axial stopper structure includes a stopper step provided on an inner surface of the exhaust manifold, and an inner surface of the stopper step is flush with an inner surface of the guide cylinder.

4. The exhaust manifold connecting structure according to claim 1, wherein the bellows includes a bellows section and straight sections connected to both ends of the bellows section, respectively, and ends of the straight sections are bent outward to form flanges; the straight section is sleeved with a connecting flange, the connecting flange is located between the turned edge and the corrugated section, and the corrugated pipe is fixedly connected with the exhaust manifold through the connecting flange.

5. The exhaust manifold connection structure according to claim 4, wherein the connection flange is fixedly connected to the exhaust manifold by a clip.