CN214368604U

CN214368604U - High-temperature EGR corrugated pipe structure wrapped with thermal insulation material

Info

Publication number: CN214368604U
Application number: CN202023087771.9U
Authority: CN
Inventors: 景建周; 吕新红; 弓育文
Original assignee: Jinzhou U Bridge Auto Parts Co ltd
Current assignee: Jinzhou U Bridge Auto Parts Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-10-08
Anticipated expiration: 2030-12-21

Abstract

The utility model relates to a parcel thermal insulation material's high temperature EGR bellows structure, include: the EGR tube body is sequentially connected with a first bent tube, a first corrugated tube, a straight tube, a second corrugated tube and a second bent tube, the periphery of the EGR tube body is wrapped with a heat insulation material, and a fixing facility is arranged outside the heat insulation material. The utility model discloses install thermal-insulated pipe additional outside the EGR pipe to the utilization can prevent that the thermal radiation of EGR pipe from making peripheral non high temperature resistant spare part take place to damage, ageing with higher speed, does not influence the heat dissipation that the EGR was managed simultaneously. The structure of body can satisfy the displacement compensation of EGR bellows at the high temperature end, and installation error, can protect the relevant part around the EGR bellows again to prevent that the pencil from being melted or split by high temperature.

Description

High-temperature EGR corrugated pipe structure wrapped with thermal insulation material

Technical Field

The utility model relates to a parcel thermal insulation material's high temperature EGR bellows structure is a mechanical structure, is a pipeline structure that automobile engine EGR system used.

Background

In recent years, with the gradual increase of the emission requirement of an automobile engine, the temperature of gas in a high-temperature EGR corrugated pipe is gradually increased, and with the increase of the temperature, the temperature resistance requirement of relevant parts around the high-temperature EGR corrugated pipe is higher, but based on the consideration of cost and the nature of materials, the high-temperature environment is difficult to overcome, and the phenomenon that the relevant parts around the high-temperature EGR corrugated pipe are damaged or melted occurs.

Disclosure of Invention

In order to overcome the problems of the prior art, the utility model provides a parcel thermal insulation material's high temperature EGR bellows structure. The structure is that heat insulation materials are arranged around the EGR corrugated pipe, so that heat in the pipeline is prevented from being dissipated, and other surrounding engine parts are prevented from being affected.

The purpose of the utility model is realized like this: a high temperature EGR bellows structure wrapped with an insulating material, comprising: the EGR tube body is sequentially connected with a first bent tube, a first corrugated tube, a straight tube, a second corrugated tube and a second bent tube, the periphery of the EGR tube body is wrapped with a heat insulation material, and a fixing facility is arranged outside the heat insulation material.

Further, the fixing device is a cable tie or a hoop.

Further, the insulating material is a fiber weave.

Further, the heat insulation material is characterized in that the inner layer is a fiber braided fabric, and the outer layer is an aluminum foil.

Further, the fiber braided fabric is one of glass fiber, ceramic fiber and basalt fiber.

Further, the glass fiber is medium silica fiber or high silica fiber.

The utility model has the advantages and beneficial effects that: the utility model discloses install thermal-insulated pipe additional outside the EGR pipe to the utilization can prevent that the thermal radiation of EGR pipe from making peripheral non high temperature resistant spare part take place to damage, ageing with higher speed, does not influence the heat dissipation that the EGR was managed simultaneously. The structure of body can satisfy the displacement compensation of EGR bellows at the high temperature end, and installation error, can protect the relevant part around the EGR bellows again to prevent that the pencil from being melted or split by high temperature.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic diagram of the structure according to the first embodiment of the present invention.

Detailed Description

The first embodiment is as follows:

this embodiment is a high temperature EGR bellows structure wrapped with an insulating material, as shown in fig. 1. The embodiment comprises the following steps: EGR body 1 that both ends have flange 1.1, 1.2, the body connect gradually first return bend 1.3, first bellows 1.4, straight tube 1.5, second bellows 1.6, second return bend 1.7, the peripheral thermal insulation material 2 that wraps up of EGR body, the thermal insulation material outside be equipped with fixed facilities 3.

The high-temperature EGR corrugated pipe is composed of a first bent pipe, a second bent pipe, two sections of corrugated pipes, a section of straight pipe and two sections of flanges which are connected in a brazing or argon arc welding mode. The flanges at the two ends play a role in fixed cooperation, namely one end of each flange is connected with the engine exhaust pipe, and the other end of each flange is connected with the EGR system. The two sections of corrugated pipes and the middle straight pipe form a flexible assembly capable of stretching, mainly play a role in compensation stretching of expansion with heat and contraction with cold, and are core components of the whole high-temperature EGR corrugated pipe. The first bent pipe and the second bent pipe play a role in connection, namely, the flanges at two ends and the corrugated straight pipe are connected, and a certain compensation and stretching effect is achieved.

The heat insulating material is generally composed of a single fiber woven mode and a fiber and aluminum foil combined mode. The fiber materials are further divided into various types such as glass fibers, ceramic fibers, basalt fibers and the like, wherein the glass fibers can be divided into medium silica fibers and high silica fibers according to different contents of silica. The temperature range of 0-1000 deg.c may be used (different materials and different heat resisting effect). The main functions of the heat insulation material are heat preservation and heat insulation.

Thermal insulation material fixed knot constructs, and fixed knot constructs the kind more, commonly used has: a band, a hoop, a single-lug stepless hoop and the like; the purpose is to secure the insulation material to the high temperature EGR bellows to prevent the insulation material from falling off or moving relative to one another.

By adopting the structure, the high-temperature EGR corrugated pipe not only meets the installation performance of the high-temperature EGR corrugated pipe, but also effectively protects the peripheral related parts.

Example two:

the present embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment with respect to the fixed facilities. The securing means described in this embodiment is a cable tie or a clamp.

The binding band can be a plastic binding band with a locking mechanism, or an iron wire wrapped with a plastic skin, and the hoop can be a single-lug stepless hoop or various throat hoops with screws for fixation.

Example three:

this embodiment is a modification of the above embodiment, and is a refinement of the above embodiment with respect to the heat insulating material. The insulation material of this embodiment is a fiber weave.

The material, the wrapping mode of thermal insulation material and the mounting mode of fastening structure can all be selected according to the actual condition, and different temperature ranges correspond different material materials, different installation environments correspond different wrapping modes, different wrapping modes and mounting efficiencies, and different fastening structures are corresponded.

Example four:

this embodiment is a modification of the above embodiment, and is a refinement of the above embodiment with respect to the heat insulating material. The heat insulating material described in this embodiment is a fabric woven fabric with an inner layer and an outer layer of aluminum foil.

The heat insulating material of this embodiment has two layers, one layer is a fiber woven fabric, and a layer of aluminum foil is wrapped outside the fiber woven fabric. The fibre knitting can block most heat, and the aluminium foil then can be through the heat reflection back that the mode of reflection heat radiation will pass the fibre knitting, plays thermal-insulated effect. Therefore, the addition of aluminum foil to the outer layer of the fabric can further produce personal effects.

Example five:

this embodiment is a modification of the above embodiment, and is a refinement of the above embodiment with respect to the fiber woven fabric. The fiber braided fabric described in this embodiment is one of glass fiber, ceramic fiber, and basalt fiber.

Various mineral fibers are selected for use according to the insulation requirements.

Example six:

this embodiment is a modification of the above embodiment, and is a refinement of the above embodiment with respect to the glass fiber. The glass fiber described in this example is a medium silica fiber or a high silica fiber.

The two fibers are selected according to the insulation requirements.

Finally, it should be noted that the above is only used for illustrating the technical solution of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred arrangement, it should be understood by those skilled in the art that the technical solution of the present invention (such as the form of the hot-end EGR pipe, the connection with the engine, etc.) can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A high temperature EGR bellows structure wrapped with an insulating material, comprising: the EGR tube body is characterized in that the periphery of the EGR tube body is wrapped with a heat insulation material, and fixing facilities are arranged outside the heat insulation material.

2. A structure according to claim 1, wherein said fastening means is a tie or clip.

3. The structure of claim 2, wherein the insulating material is a fiber weave.

4. A structure according to claim 3, wherein the insulating material is a fabric woven fabric having an inner layer and an outer layer of aluminum foil.

5. A structure according to claim 3 or 4, characterized in that the fibre fabric is one of glass fibres, ceramic fibres, basalt fibres.

6. The structure of claim 5, wherein said glass fibers are medium silica fibers or high silica fibers.