Novel EGR corrugated pipe suitable for high temperature and provided with composite layer flow guide pipe structure

A technology of composite layer and diversion pipe, which is applied in the direction of pipes/pipe joints/fittings, expansion compensation devices for pipelines, pipe components, etc., which can solve problems such as root fractures between flanges and pipes, and reduce thermal stress , the service life is improved, and the effect of ensuring high temperature strength

Pending Publication Date: 2021-12-31
BEIJING U BRIDGE CHAOYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the embodiment of the present invention provides a new type of EGR corrugated pipe with a composite layer guide pipe structure to solve the problem that the existing EGR corrugated pipe is prone to appear at the corrugation or at the root of the connection between the flange and the pipe during actual use. broken problem

Method used

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  • Novel EGR corrugated pipe suitable for high temperature and provided with composite layer flow guide pipe structure
  • Novel EGR corrugated pipe suitable for high temperature and provided with composite layer flow guide pipe structure
  • Novel EGR corrugated pipe suitable for high temperature and provided with composite layer flow guide pipe structure

Examples

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Comparison scheme
Effect test

Embodiment 1

[0034] See figure 1 , a new type of EGR corrugated pipe with a composite layer guide pipe structure suitable for high temperature includes: a flange 1, a composite layer guide pipe 2, a multilayer corrugated pipe 3, and a straight pipe 4. The straight pipe 4 can be arranged according to actual needs, and the straight pipe 4 can also be replaced by an elbow or the straight pipe 4 can be removed to directly connect to the second flange.

[0035] The flange 1 and the straight pipe 4 are respectively arranged at both ends of the new EGR bellows structure;

[0036] One end of the multilayer bellows 3 is connected to the flange 1, and the other end is connected to the straight pipe 4;

[0037] The composite layer diversion pipe 2 is formed by nesting two pipes of different specifications to form a medium-vacuum closed structure, one end of which is connected to the flange 1, and the other end is inserted into the inside of the straight pipe 4 without welding;

[0038] The number o...

Embodiment 2

[0043] See figure 2 , a new type of EGR corrugated pipe with a composite layer guide pipe structure suitable for high temperature includes: a flange 1, a composite layer guide pipe 2, a multilayer corrugated pipe 3, and a straight pipe 4. Straight pipe 4 also can be bent pipe according to actual needs or removes straight pipe 4 and directly connects flange.

[0044] The flange 1 and the straight pipe 4 are respectively arranged at both ends of the new EGR bellows structure;

[0045] One end of the multilayer bellows 3 is connected to the flange 1, and the other end is connected to the straight pipe 4;

[0046] Composite layer diversion pipe 2 is nested by two kinds of pipes of different specifications, forming a real An empty closed structure, one end of which is connected to the flange 1, and the other end is inserted into the inside of the straight pipe 4 without welding;

[0047] The outer end of the composite layer guide tube 2 located in the straight tube 4 is provided...

Embodiment 3

[0053] See image 3 , a new type of EGR corrugated pipe with a composite layer guide pipe structure suitable for high temperature includes: a flange 1, a composite layer guide pipe 2, a multilayer corrugated pipe 3, and a straight pipe 4. Straight pipe 4 also can be bent pipe according to actual needs or removes straight pipe 4 and directly connects the second flange.

[0054] The flange 1 and the straight pipe 4 are respectively arranged at both ends of the new EGR bellows structure;

[0055] One end of the multilayer bellows 3 is connected to the flange 1, and the other end is connected to the straight pipe 4;

[0056] The composite layer diversion pipe 2 is formed by nesting two pipes of different specifications to form a medium-vacuum closed structure, one end of which is connected to the flange 1, and the other end is inserted into the inside of the straight pipe 4 without welding;

[0057] Composite layer guide pipe 2 is located on the outside of the end of straight pi...

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Abstract

The invention discloses a novel EGR corrugated pipe suitable for high temperature and provided with a composite layer flow guide pipe structure. The novel EGR corrugated pipe comprises a flange, a composite layer flow guide pipe, a multi-layer corrugated pipe and a straight pipe; one end of the composite layer flow guide pipe is connected with the flange, the straight pipe is located at the other end of the composite layer flow guide pipe, the multi-layer corrugated pipe is arranged on the periphery of the composite layer flow guide pipe, one end of the multi-layer corrugated pipe is connected with the flange, the other end of the multi-layer corrugated pipe is connected with one end of the straight pipe, and the other end of the composite layer flow guide pipe is located in the straight pipe. The novel EGR corrugated pipe can solve the problem that in the actual using process of an existing EGR corrugated pipe, the corrugation position or the root portion where a flange and a pipe are connected is prone to breakage.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and in particular relates to a novel EGR corrugated pipe suitable for high temperature with a composite layer guide pipe structure. Background technique [0002] The EGR pipe with bellows can absorb thermal expansion, mechanical vibration, exhaust gas pressure pulse, installation deviation, and play a role in displacement compensation for the entire EGR system. [0003] Under the existing technology, the EGR corrugated pipeline has a poor service environment. There are a large number of heat sources in the external environment and high-temperature exhaust gas inside the pipeline, which is highly corrosive. The temperature range of the high temperature end of the EGR bellows for diesel engines is from 670°C to 750°C, the temperature range of the high temperature end of EGR bellows for natural gas engines is from 750°C to 800°C or even higher, and the temperature range of the hi...

Claims

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Application Information

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IPC IPC(8): F16L51/02
CPCF16L51/02F16L51/022
Inventor 景建周弓育文李清会汤俊洁
Owner BEIJING U BRIDGE CHAOYANG
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