CN216617629U

CN216617629U - Packaging structure of automobile three-way catalyst

Info

Publication number: CN216617629U
Application number: CN202220015125.1U
Authority: CN
Inventors: 汪小川; 王秀月; 杨镇江
Original assignee: Chongqing Yuhu Auto Parts Co ltd
Current assignee: Chongqing Yuhu Auto Parts Co ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-05-27
Anticipated expiration: 2032-01-06

Abstract

The utility model relates to the technical field of engine exhaust purification treatment, and particularly discloses an encapsulation structure of an automobile three-way catalyst, which comprises a catalyst body and an exhaust pipe, wherein a core body is arranged in the catalyst body, a gasket, an interlayer inner sleeve, an insulating interlayer and an interlayer outer sleeve are sequentially arranged in the core body from inside to outside, a metal shell is detachably connected on the interlayer outer sleeve, a carrier is arranged at one side of an air inlet of the catalyst, a catalyst layer is coated on the carrier, a plurality of through holes are formed in the carrier, and a loose catalyst layer is coated on the surface of the carrier.

Description

Packaging structure of automobile three-way catalyst

Technical Field

The application relates to the technical field of engine tail gas purification treatment, and particularly discloses an automobile three-way catalyst converter packaging structure.

Background

A catalyst (also called Catalytic Converter) is installed in the exhaust system of an automobile and is used to reduce most of the exhaust pollutants discharged from the engine and remove 90% of the three main pollutants, HC (hydrocarbon), CO (carbon monoxide) and NOx (nitrogen oxide) (i.e. the chemical reactions that occur when removing these three compounds).

The working principle of the existing technology of the catalyst is as follows: when high-temperature automobile exhaust passes through the purification device, the purifying agent in the three-way catalyst enhances the activity of three gases of CO, HC and NOx to promote the three gases to carry out certain oxidation-reduction chemical reaction, wherein CO is oxidized into colorless and nontoxic carbon dioxide gas at high temperature; HC compounds are oxidized at high temperature to water (H20) and carbon dioxide; NOx is reduced to nitrogen and oxygen. Three kinds of harmful gases are changed into harmless gases, so that the automobile exhaust can be purified.

A catalyst assembly: the automobile catalytic converter mainly comprises a shell, a heat insulation protective cover, a middle section, inlet and outlet conical sections, an elastic clamping material, a straight-through prevention sealing catalyst and the like, wherein a carrier is arranged in the catalytic converter, the carrier is made of ceramics, the surface of the carrier is smooth, the contact area with reaction gas is small, and the reaction is incomplete.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem of incomplete reaction caused by smooth surface of a carrier in the traditional catalyst.

In order to achieve the purpose, the basic scheme of the utility model provides an automobile three-way catalyst packaging structure which comprises a catalyst body and an exhaust pipe, wherein a core body is arranged in the catalyst body, a gasket, an interlayer inner sleeve, an insulating interlayer and an interlayer outer sleeve are sequentially arranged in the core body from inside to outside, a metal shell is detachably connected on the interlayer outer sleeve, a carrier is arranged on one side of an air inlet of the catalyst, a catalyst layer is coated on the carrier, and a plurality of through holes are formed in the carrier.

The principle and effect of this basic scheme lie in:

further, the catalytic layer is made of a noble metal material.

Further, the metal shell is of a tubular structure and comprises two symmetrically arranged shells.

Compared with the prior art, a very loose catalysis layer is coated on the surface of the carrier, and the surface is very rough, so that the actual area of the wall surface is increased, the active surface and the oxygen storage capacity of the automobile catalytic converter are greatly increased, and the through holes are formed in the carrier, so that the contact area with gas can be increased, and the reaction degree is increased.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating a package structure of an automotive three-way catalyst according to an embodiment of the present disclosure;

fig. 2 shows a cross-sectional view of a carrier in an encapsulation structure of an automotive three-way catalyst according to an embodiment of the present application.

Detailed Description

To further illustrate the technical means and effects of the present invention for achieving the intended purpose of the utility model, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Reference numerals in the drawings of the specification include: the catalyst comprises a carrier 1, a through hole 2, a catalyst layer 3, an exhaust pipe 4, a metal shell 5, an interlayer outer sleeve 6, an insulating layer 7, an interlayer inner sleeve 8 and a gasket 9.

An encapsulation structure of an automobile three-way catalyst, embodiments of which are shown in fig. 1-2: including catalyst converter body and blast pipe 4, the inside core that is equipped with of catalyst converter body is by interior liner 9, intermediate layer endotheca 8, insulating intermediate layer and intermediate layer overcoat 6 of being equipped with in proper order outside to in the core, can dismantle on the intermediate layer overcoat 6 and be connected with metal casing 5, catalyst converter air inlet one side is equipped with carrier 1, has scribbled catalysis layer 3 on the carrier 1, has seted up a plurality of through-holes 2 on the carrier 1, and it has one deck very loose catalysis layer 3 at carrier 1 surface coating, and it uses metal oxide gamma-AL 2O3 to give first place to. This increases the actual area of the wall surface due to the very rough surface, increasing the active surface and the ability to store oxygen of the automotive catalytic converter. The outside of the active layer is coated with a promoter containing elements such as zirconium Zr, cerium Ce and the like and a main catalyst containing noble metals such as rhodium Rh, palladium Pd, platinum Pt and the like, through holes 2 are formed in the carrier 1 to increase internal air exchange, and the gasket 9 is a high-temperature resistant blanket and consists of ceramic fibers, vermiculite particles and connecting materials. It supports the catalyst, plays a role in sealing and shock resistance, compensates the expansion of volume when heating, and insulates heat to the catalytic reactor, and the exhaust pipe 4 is a stainless steel stamping piece, guides the exhaust to enter the catalytic bed from the front end exhaust pipe 4 and guides the exhaust to enter the rear end exhaust pipe 4 from the rear section of the catalytic bed. The inner heat insulation design also adopts an additional inner-layer taper pipe to prevent high-temperature exhaust from contacting the outer-layer taper pipe or the shell, and the metal shell 5 is a tubular shell. The metal shell 5 is formed in a "clamshell" type structure with two shells connected by bolts, an insulating layer 7 to control heat dissipation, and for the external insulation design, the insulating layer is a blanket catalytic ceramic fiber layer between an inner interlayer sleeve 8 and an outer interlayer sleeve 6.

Compared with the prior art, the surface of the carrier 1 is coated with a loose active layer, and the surface is rough, so that the actual area of the wall surface is increased, the active surface and the oxygen storage capacity of the automobile catalytic converter are greatly increased, and the through hole 2 is formed in the carrier 1, so that the contact area with gas can be increased, and the reaction degree is increased.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides an automobile three way catalyst converter's packaging structure which characterized in that: including catalyst converter body and blast pipe, the inside core that is equipped with of catalyst converter body is equipped with liner, intermediate layer endotheca, insulating intermediate layer and intermediate layer overcoat by interior outside to in proper order in the core, can dismantle on the intermediate layer overcoat and be connected with metal casing, catalyst converter air inlet one side is equipped with the carrier, scribbles the catalysis layer on the carrier, has seted up a plurality of through-holes on the carrier.

2. The packaging structure of the automobile three-way catalyst according to claim 1, wherein the catalyst layer is made of a noble metal material.

3. The packaging structure of the three-way catalyst of the automobile as claimed in claim 1, wherein the metal shell is a tubular structure, and the metal shell comprises two symmetrically arranged shells.