CN213627749U

CN213627749U - Reinforced vortex rear connecting pipe welding structure

Info

Publication number: CN213627749U
Application number: CN202022172341.0U
Authority: CN
Inventors: 赵泉; 曹杨军; 刘振锋
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-07-06
Anticipated expiration: 2030-09-28

Abstract

The utility model discloses a reinforced vortex rear connecting pipe welding structure, which comprises an air inlet pipe, a gas guide pipe, a corrugated pipe and an air outlet pipe, wherein one end of the corrugated pipe is hermetically connected with the air outlet pipe, and the other end of the corrugated pipe is hermetically connected with the outer side of the air inlet end of the gas guide pipe; the gas guide pipe is arranged in the corrugated pipe, the inner side of the gas inlet end of the gas guide pipe is hermetically connected with the gas inlet pipe, and the gas outlet end of the gas guide pipe extends to the inner part of the gas outlet pipe along the axial direction of the corrugated pipe and is arranged in a suspended manner; the gas guide pipe is of a structure that the gas inlet end is gradually reduced towards the gas outlet end. The utility model has the advantages of compact structure, vibration resistance, vibration reduction, reliable use and the like.

Description

Reinforced vortex rear connecting pipe welding structure

Technical Field

The utility model relates to a bellows technical field especially relates to take over welded structure behind strenghthened type whirlpool.

Background

The vortex rear connecting pipe is an important connecting structure of a compression ignition type engine and a spark ignition type engine, is generally arranged between an engine exhaust pipe and a silencer or a postprocessor, has variable and flexible shapes, is convenient for the arrangement of an exhaust silencing system of a passenger car, a commercial car and an engineering car, more efficiently utilizes the space of the whole car and bears the flow guiding effect of high-temperature gas. According to the space condition and the application field of the whole vehicle, the vortex rear pipe can adopt a cast pipeline, a welded steel pipe, a corrugated pipe, a reducing pipeline, a conformal pipeline and the like. The welded corrugated pipe is widely applied, but the welded corrugated pipe at present has a simple welding structure, an unreasonable welding structure and an unreasonable design of a high-temperature gas inner-layer guide pipe, so that the corrugated pipe has high failure rate, and the high-temperature gas is mainly concentrated on cracks, air leakage, welding loosening and the like of the corrugated pipe, so that the high-temperature gas is leaked, and the whole vehicle is in danger of firing; meanwhile, the tail gas leakage leads to the increase of the noise of the whole vehicle, and untreated gas is discharged to pollute the environment.

The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a compact structure, use reliable bellows structure.

Therefore, the utility model provides a welded structure is taken over behind strenghthened type whirlpool.

Preferably, the present invention may also have the following technical features:

the reinforced vortex rear connecting pipe welding structure comprises an air inlet pipe, a gas guide pipe, a corrugated pipe and an air outlet pipe, wherein one end of the corrugated pipe is hermetically connected with the air outlet pipe, and the other end of the corrugated pipe is hermetically connected with the outer side of the air inlet end of the gas guide pipe; the gas guide pipe is arranged in the corrugated pipe, the inner side of the gas inlet end of the gas guide pipe is hermetically connected with the gas inlet pipe, and the gas outlet end of the gas guide pipe extends to the inner part of the gas outlet pipe along the axial direction of the corrugated pipe and is arranged in a suspended manner; the gas guide pipe is of a structure that the gas inlet end is gradually reduced towards the gas outlet end.

Furthermore, one end of the air inlet pipe connected with the gas conduit is of a flaring structure.

Furthermore, one end of the air outlet pipe connected with the corrugated pipe is of a flaring structure.

Further, the gas outlet end of the gas conduit extends into the transition position of the flaring structure of the gas outlet pipe.

Furthermore, the distance between the outer side of the gas guide pipe and the inner wall of the gas outlet pipe is 2-5 mm.

Furthermore, the air inlet pipe, the air guide pipe, the corrugated pipe and the air outlet pipe are coaxial.

Further, the material of the gas conduit is one of aluminum-based alloy, nickel-aluminum alloy, chromium-nickel alloy and nickel-copper alloy.

The utility model discloses beneficial effect with the prior art contrast includes: the junction of intake pipe, gas conduit, bellows adopts heap three-layer welded structure, avoids intake pipe and bellows to make an organic whole, reduces the pipeline processing degree of difficulty, reduces the fracture risk of splice. In addition, the independent gas guide pipe in the corrugated pipe is designed in a tapered mode, and the gas outlet end of the gas guide pipe extends into the gas outlet pipe for a certain distance, so that the gas flow can be accelerated, the high-temperature gas is prevented from flowing back into the corrugated pipe, the impact of the high-temperature gas on the inner wall of the corrugated pipe is reduced, and the reliability of the corrugated pipe is improved; the gas outlet end of the gas guide pipe is arranged in a suspension mode, so that the bending freedom degree of the corrugated pipe can be improved, the front and back system connection of the pipeline is facilitated, and the reliability of the whole pipeline is improved.

Drawings

Fig. 1 is a sectional view of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts, unless otherwise specified.

The reinforced vortex rear connecting pipe welding structure shown in fig. 1 comprises an air inlet pipe 1, a gas guide pipe 3, a corrugated pipe 4 and an air outlet pipe 8, wherein the right end of the corrugated pipe 4 is welded and sealed with the air outlet pipe 8, and the left end of the corrugated pipe is welded and sealed with the outer side of the air inlet end 3 of the gas guide pipe 5; the gas guide pipe 5 is arranged inside the corrugated pipe 4, the inner side of the gas inlet end 3 of the gas guide pipe is welded and sealed with the gas inlet pipe 1, and the gas outlet end 7 extends to the inside of the gas outlet pipe 8 along the axial direction of the corrugated pipe 4 and is arranged in a suspended manner; the gas conduit 5 is of a structure that the gas inlet end 3 is gradually reduced towards the gas outlet end 7. The junction 2 of the air inlet pipe 1, the gas guide pipe 5 and the corrugated pipe 4 adopts a stacked three-layer welding structure, so that the air inlet pipe 1 and the corrugated pipe 4 are prevented from being integrated, the pipeline processing difficulty is reduced, and the risk of fracture of a welding part is reduced. Moreover, the independent gas guide pipe 5 in the corrugated pipe 4 adopts a tapered design 5, and the gas outlet end 7 of the gas guide pipe 5 extends into the gas outlet pipe 8 for a certain distance, so that the structure can accelerate the flow of gas flow, thereby reducing the backflow of high-temperature gas into the corrugated pipe, reducing the impact of the high-temperature gas on the inner wall of the corrugated pipe and improving the reliability of the corrugated pipe; the air outlet end 7 of the gas guide pipe 5 is arranged in a hanging mode, so that the bending freedom degree of the corrugated pipe 4 can be improved, the front and the back of the pipeline can be conveniently connected through a system, and the reliability of the whole pipeline is further improved.

In a preferred embodiment, the end of the gas inlet pipe 1 connected with the gas conduit 5 is in a flaring structure, so that the gas inlet resistance is reduced, and the pressure loss is reduced. The one end that outlet duct 8 and bellows 4 are connected is flaring structure 6, forms slender hot-blast when avoiding gaseous backward flow to get into bellows 4 inside, simultaneously, and gaseous backward flow gets into bellows 4 inside back, and during the flaring portion of outlet duct 8, gaseous direction changes, and the gaseous flow direction of dispersion reduces the impact force of backward flow gas to bellows 4 inside.

In a preferred option, the outlet end 7 of the gas conduit 5 extends into a transition 9 to the flared configuration of the outlet tube 8. The distance between the outer side of the gas guide pipe 5 and the inner wall of the gas outlet pipe 8 is 2-5 mm. The air inlet pipe 1, the gas guide pipe 5, the corrugated pipe 4 and the air outlet pipe 8 are coaxial. The material of the gas conduit 5 is one of aluminum-based alloy, nickel-aluminum alloy, chromium-nickel alloy and nickel-copper alloy.

Those skilled in the art will recognize that numerous variations are possible in light of the above description, and therefore the examples and drawings are merely intended to describe one or more specific embodiments.

While there has been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions can be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents falling within the scope of the present invention.

Claims

1. Reinforced vortex rear connecting pipe welding structure comprises an air inlet pipe, a gas guide pipe, a corrugated pipe and an air outlet pipe, and is characterized in that: one end of the corrugated pipe is hermetically connected with the air outlet pipe, and the other end of the corrugated pipe is hermetically connected with the outer side of the air inlet end of the air guide pipe; the gas guide pipe is arranged in the corrugated pipe, the inner side of the gas inlet end of the gas guide pipe is hermetically connected with the gas inlet pipe, and the gas outlet end of the gas guide pipe extends to the inner part of the gas outlet pipe along the axial direction of the corrugated pipe and is arranged in a suspended manner; the gas guide pipe is of a structure that the gas inlet end is gradually reduced towards the gas outlet end.

2. The reinforced type welding structure for the vortex rear connecting pipe according to claim 1, wherein: and one end of the air inlet pipe connected with the gas conduit is of a flaring structure.

3. The reinforced type welding structure for the vortex rear connecting pipe according to claim 1, wherein: and one end of the air outlet pipe connected with the corrugated pipe is of a flaring structure.

4. The reinforced type welding structure for the vortex rear connecting pipe according to claim 3, wherein: and the gas outlet end of the gas guide pipe extends into the transition part of the flaring structure of the gas outlet pipe.

5. The reinforced type welding structure for the vortex rear connecting pipe according to claim 4, wherein: the distance between the outer side of the gas guide pipe and the inner wall of the gas outlet pipe is 2-5 mm.

6. The reinforced type welding structure for the vortex rear connecting pipe according to claim 1, wherein: the air inlet pipe, the gas guide pipe, the corrugated pipe and the air outlet pipe are coaxial.

7. The reinforced type welding structure for the vortex rear connecting pipe according to claim 1, wherein: the material of the gas conduit is one of aluminum-based alloy, nickel-aluminum alloy, chromium-nickel alloy and nickel-copper alloy.