CN218325000U

CN218325000U - Catalyst assembly with novel structure

Info

Publication number: CN218325000U
Application number: CN202221487682.XU
Authority: CN
Inventors: 陈法献; 谢德强; 罗雨馨; 乔盛楠
Original assignee: Zhejiang Bondlye Environmental Technology Co ltd
Current assignee: Zhejiang Bondlye Environmental Technology Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2023-01-17
Anticipated expiration: 2032-06-14

Abstract

The utility model belongs to the technical field of the car catalyst converter technique and specifically relates to a catalyst converter assembly of novel structure. This catalyst converter assembly of novel structure, its characterized in that includes: casing, fixed mounting TWC (4), barrel (11), fixed mounting in the casing GPF (12) in barrel (11), the casing preceding, the back both ends of barrel are equallyd divide and are provided with inlet end cover, the end cover of giving vent to anger respectively, the end cover of giving vent to anger of casing is connected with bellows (6), the inlet end cover of barrel (11) is connected with intake pipe (9), bellows (6) with intake pipe (9) are connected. The utility model discloses in, bellows structure arranges in TWC preceding stage department, improves the whole modal promotion of catalyst converter assembly, resonance risk reduces, and adjusts the angle between TWC and the GPF easily during the installation, the installation of being convenient for.

Description

Catalyst assembly with novel structure

Technical Field

The utility model belongs to the technical field of the automobile catalyst converter technique and specifically relates to a catalyst converter assembly of novel structure.

Background

The three-way catalyst mainly collects harmful gases such as CO, HC, NOx and the like discharged by incomplete combustion to the three-way catalyst for reaction, and the harmful gases are converted into harmless carbon dioxide, water and nitrogen through oxidation and reduction effects, so that the emission requirement is met. With increasingly stringent emission limits on automobile exhaust, three-way catalytic converters have become the most effective aftertreatment devices for automobile exhaust emission control. From the middle of the 20 th century, the continuous improvement of the electronic control technology of the engine and the improvement of the fuel quality lead the three-way catalytic converter to be rapidly developed and widely applied, and the structure and the performance of the three-way catalytic converter to be continuously improved and improved.

Currently, existing catalyst assemblies have the following drawbacks:

1) The corrugated pipe structure is generally arranged at the rear stage of the GPF, so that the heat deformation resistance and the shock absorption capability at the front stage are poor, and the angle between the TWC and the GPF is not easy to adjust during installation;

2) The connection mode of the corrugated pipe and the flange is mostly the welding of the outer ring of the straight pipe; the structure is not compact, the available space in the vehicle is small, and the sample piece is easy to deform due to multi-welding;

3) The installation mode of the differential pressure pipe adopts the integral type of the differential pressure pipe and the differential pressure seat, so that the cost is high, the universality is poor and the weight is heavier;

4) And the hook structure is complicated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a catalyst converter assembly of novel structure to solve above-mentioned technical problem.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a novel catalyst converter assembly of structure, include: casing, fixed mounting TWC, barrel, fixed mounting in the casing GPF in the barrel, the casing preceding, the back both ends of barrel are equallyd divide and are do not be provided with inlet end cover, the end cover of giving vent to anger of casing is connected with the bellows, the inlet end cover of barrel is connected with the intake pipe, the bellows with intake-tube connection.

The utility model discloses an in an embodiment of the catalyst converter assembly of novel structure, the one end of bellows pass through the circular flange with the end cover welding of giving vent to anger of casing, the other end of bellows is provided with TWC flange of giving vent to anger, the one end of intake pipe be provided with TWC flange connection's GPF air inlet flange, the other end of intake pipe pass through the circular flange with the end cover welding of admitting air of barrel.

In an embodiment of the catalyst assembly with novel structure of the present invention, the central axis of the air inlet cover of the housing and the central axis of the main body of the housing have an included angle α, and α is greater than or equal to 94 ° and less than or equal to 96 °.

The utility model discloses an in the embodiment of the catalyst converter assembly of novel structure, the air inlet department of the inlet end cover of casing is equipped with the air inlet flange, the gas outlet department of the air outlet end cover of barrel is equipped with the air outlet flange.

In an embodiment of the catalyst assembly with the novel structure of the present invention, the air inlet end cap and the air outlet end cap of the housing are respectively provided with an oxygen sensor seat.

In one embodiment of the new construction catalyst assembly of the present invention, the exterior of the housing is provided with a TWC heat shield.

In an embodiment of the catalyst assembly with the novel structure of the present invention, the inlet end cap and the outlet end cap of the cylinder are respectively connected with a differential pressure pipe.

The utility model discloses an in the embodiment of the catalyst converter assembly of novel structure, the tip of pressure differential pipe is provided with the pier nose, with the connecting portion that set up respectively on the inlet end cover of barrel, the end cover of giving vent to anger seal through the welding swell mode.

In an embodiment of the catalyst assembly of the present invention, the outer wall of the housing is provided with an adjustable adapter bracket for fixing the catalyst on the vehicle; and a support frame for supporting the differential pressure pipe is arranged on the outer wall of the cylinder body.

In an embodiment of the catalyst assembly of the novel structure of the present invention, the outer wall of the cylinder is fixed with two pairs of hooks disposed along the axial symmetry.

In the utility model, the bellows structure is arranged at the TWC front stage, so that the heat deformation resistance and the shock absorption capacity between the TWC and the GPF are improved, and the overall modal of the catalyst assembly is improved and the resonance risk is reduced; and the angle between the TWC and the GPF is easy to adjust during installation, thereby facilitating installation.

In the utility model, the corrugated pipe is directly welded with the circular flange, and the straight pipe transition is cancelled, so that the structure of the sample piece is more compact; reducing thermal deformation of the sample piece caused by multi-pass welding; the available space in the vehicle is improved, and the competitiveness of the vehicle in market sales is improved.

In the utility model, the end part of the differential pressure pipe is provided with the pier head, and the connecting parts which are respectively arranged on the air inlet end cover and the air outlet end cover of the cylinder body are sealed in a welding bulge mode, so that compared with the integral type of the differential pressure pipe and the differential pressure seat, the installation mode of welding the differential pressure seat does not need the differential pressure seat, the material cost, the die cost and the like are saved, and the cost is reduced; the pier head area is smaller than that of the differential pressure seat, and the pier head can be arranged at an extreme position, so that the universality is good; the weight is light, and the device can be used when the sample has the weight requirement.

The utility model discloses in, the lifting hook adopts symmetrical structure, and less (the quantity of die sinking becomes 1 set by 3 sets) need not carry out the part mistake proofing, plays certain effect in the lifting weight down in comparison with current lifting hook structure mould.

Drawings

Fig. 1 is a schematic structural view of a catalyst assembly of a novel structure according to a first embodiment of the present invention.

FIG. 2 is a schematic, partially cut-away view of the new construction of the catalyst assembly of FIG. 1.

FIG. 3 is a schematic cross-sectional view of the cartridge of the new construction catalyst assembly of FIG. 1.

Fig. 4 is an enlarged schematic view at a of fig. 3.

Fig. 5 is a schematic structural view of a conventional hook.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; of course, mechanical connection and electrical connection are also possible; alternatively, they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 4, a catalyst assembly of a first embodiment of the present invention includes: the automobile exhaust purifier comprises a shell, a TWC4 (three-way catalytic converter) fixedly installed in the shell, a cylinder body 11 and a GPF12 (gasoline particle catcher) fixedly installed in the cylinder body 11, wherein a gas inlet end cover and a gas outlet end cover are respectively arranged at the front end and the rear end of the shell and the cylinder body 11, the gas outlet end cover of the shell is connected with a corrugated pipe 6, a gas inlet end cover 10 of the cylinder body 11 is connected with a gas inlet pipe 9, and the corrugated pipe 6 is connected with the gas inlet pipe 9. And

gaskets

23 and 24 are respectively arranged between the shell and the TWC4 and between the barrel 11 and the GPF12 and are used for wrapping and fixing the TWC4 and the GPF12.

One end of the corrugated pipe 6 is welded with the air outlet end cover of the shell through a circular flange 22, the other end of the corrugated pipe 6 is provided with a TWC air outlet flange 7, one end of the air inlet pipe 9 is provided with a GPF air inlet flange 8 connected with the TWC air outlet flange 7, and the other end of the air inlet pipe 9 is welded with the air inlet end cover 10 of the barrel 11 through the circular flange 22. The corrugated pipe is directly welded with the circular flange 22, and straight pipe transition is eliminated, so that the structure of a sample piece is more compact; reducing thermal deformation of the sample caused by multi-pass welding; the available space in the vehicle is improved, and the competitiveness of the vehicle in market sales is improved.

The included angle between the central axis of the air inlet end cover 3 of the shell and the central axis of the main body of the shell is alpha, and alpha is more than or equal to 94 degrees and less than or equal to 96 degrees. The design reduces the impact when tail gas just flows in, and is favorable for improving the stability of the catalyst assembly.

An air inlet flange 1 is arranged at an air inlet of an air inlet end cover 3 of the shell, and an air outlet flange 14 is arranged at an air outlet of an air outlet end cover of the cylinder body 11. The outlet flange 14 is provided with knurled screws 15 to improve the connection.

An air inlet end cover and an air outlet end cover of the shell are respectively provided with an oxygen sensing seat 2, and the oxygen sensing seat 2 is provided with an oxygen sensor for respectively detecting the oxygen content before and after the TWC 4. Normally, the oxygen sensor voltage installed at the rear end of the TWC4 fluctuates much less than the oxygen sensor voltage installed at the front end of the TWC 4. A TWC4 operating normally on a car consumes oxygen when converting two harmful substances, CO and HC. When the three-way catalytic converter is broken, the conversion efficiency is basically lost, so that the oxygen values at the front end and the rear end are close to each other, and the voltage waveforms and the fluctuation ranges of the signals of the oxygen sensors at the moment are both consistent, therefore, whether the TWC4 is damaged or not can be detected through the front oxygen sensor and the rear oxygen sensor.

An oxygen sensor of an air inlet end cover of the shell can also feed back signals to the ECU after detecting the oxygen content in front of the TWC4 so as to control the fuel injection quantity of the fuel injector, thereby controlling the air-fuel ratio to be close to a theoretical value and maintaining the purifying capability of the catalyst on CO, HC and Nox.

The exterior of the housing is provided with a TWC heat shield 5. The casing temperature is high, and welding stent need design necessary breach on the casing, and the assembly is arranged compactly, and is little with peripheral clearance, for avoiding the influence of high temperature casing to other parts, can choose for use common sandwich to separate the heat exchanger for heat. And the heat insulation cotton is not selected, so that the adverse effects caused by leakage of the heat insulation cotton and the like are prevented.

The inlet end cover 10 and the outlet end cover 13 of the cylinder 11 are respectively connected with a differential pressure pipe 19 and a differential pressure pipe 16. Pier heads are arranged at the end parts of the differential pressure pipe 19 and the differential pressure pipe 16, and the differential pressure pipe and the connecting parts respectively arranged on the air inlet end cover and the air outlet end cover of the cylinder body 11 are sealed in a welding bulge mode. Specifically, the pier head has a protrusion 120, and the protrusion 120 is a drum-shaped structure, i.e. an abacus bead structure. The utility model provides a connection structure compares in pressure differential pipe and pressure differential seat integral type, the mounting means of welding pressure differential seat, and cost reduction (need not the pressure differential seat, save material cost, mould expense etc.), commonality are good (can pier nose area compare the pressure differential seat little, can arrange in comparatively extreme position), the weight is lighter (when the appearance has the weight requirement, can lighten weight).

The air outlet end cover 13 of the cylinder 11 is in a conical shell shape, which is beneficial to gradually reducing the caliber after catalysis, improving the pressure intensity again and being beneficial to exhausting.

The outer wall of the shell is provided with a switching bracket 20, and a bracket 21 is detachably mounted on the switching bracket 20. The switching support 20 is fixed on the outer wall of the shell in a welding mode, screw holes are formed in the switching support 20, and the support 21 is installed on the switching support 20 through bolts. The adapter bracket 20 is connected with brackets 21 of different specifications to realize adjustable fixing of the catalytic converter on the automobile. The outer wall of the cylinder 11 is provided with a support frame 110 for supporting the differential pressure pipe, and the distance between the differential pressure pipe and the cylinder 11 is maintained. A connection bracket 111 is provided between the differential pressure pipe 16 and the differential pressure pipe 19 to maintain a distance between the differential pressure pipe 16 and the differential pressure pipe 19.

Two pairs of

hooks

17 and 18 which are symmetrically arranged along the axial direction are fixed on the outer wall of the barrel body 11. Compared with the existing hook structure (shown in fig. 5), the arrangement of the symmetrical structure has the advantages that the number of moulds (the number of mould opening is changed from 3 sets to 1 set) is less, the error prevention of parts is not needed, and a certain effect on reducing the weight is achieved.

In the utility model, the bellows structure is arranged at the TWC front stage, which improves the heat deformation resistance and the shock absorption capacity between the TWC and the GPF, thereby improving the overall mode of the catalytic converter assembly and reducing the resonance risk; and the angle between the TWC and the GPF is easy to adjust during installation, thereby facilitating installation.

In the utility model, the corrugated pipe is directly welded with the circular flange, and the straight pipe transition is cancelled, so that the structure of the sample piece is more compact; reducing thermal deformation of the sample caused by multi-pass welding; the available space in the vehicle is improved, and the competitiveness of the vehicle in market sales is improved.

In the utility model, the end part of the differential pressure pipe is provided with the pier head, and the connecting parts which are respectively arranged on the air inlet end cover and the air outlet end cover of the cylinder body are sealed in a welding bulge mode, so that compared with the integral type of the differential pressure pipe and the differential pressure seat, the installation mode of welding the differential pressure seat does not need the differential pressure seat, the material cost, the die cost and the like are saved, and the cost is reduced; the pier head area is smaller than that of the differential pressure seat, the pier head can be arranged at a more extreme position, and the universality is good; the weight is light, and the sample piece can be used when the weight requirement exists.

The utility model discloses in, the lifting hook adopts symmetrical structure, and less (the quantity of die sinking is become 1 set by 3 sets) than current lifting hook structure mould, need not carry out the part mistake proofing, play certain effect on falling the heavy object.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitution or transformation made by the technical personnel in the technical field on the basis of the utility model is within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims

1. A catalyst assembly of novel structure, comprising: casing, fixed mounting TWC (4), barrel (11), fixed mounting in the casing GPF (12) in barrel (11), the casing preceding, the back both ends of barrel are equallyd divide and are provided with inlet end cover, the end cover of giving vent to anger respectively, the end cover of giving vent to anger of casing is connected with bellows (6), the inlet end cover of barrel (11) is connected with intake pipe (9), bellows (6) with intake pipe (9) are connected.

2. The catalyst assembly with a novel structure according to claim 1, wherein one end of the corrugated pipe (6) is welded with the gas outlet end cover of the shell through a circular flange, the other end of the corrugated pipe (6) is provided with a TWC gas outlet flange (7), one end of the gas inlet pipe (9) is provided with a GPF gas inlet flange (8) connected with the TWC gas outlet flange (7), and the other end of the gas inlet pipe (9) is welded with the gas inlet end cover of the cylinder (11) through a circular flange.

3. The catalyst assembly with the novel structure as claimed in claim 1, wherein an included angle between a central axis of an air inlet of the air inlet end cover of the housing and a central axis of a main body of the housing is α, and 94 ° α or more and 96 ° or less.

4. The catalyst assembly with the novel structure as claimed in claim 1, wherein an air inlet flange (1) is arranged at an air inlet of an air inlet end cover of the shell, and an air outlet flange (14) is arranged at an air outlet of an air outlet end cover of the cylinder body.

5. The catalyst assembly with the novel structure as claimed in claim 1, wherein the inlet end cover and the outlet end cover of the housing are respectively provided with an oxygen sensing seat (2).

6. A new construction of a catalyst assembly according to claim 1, characterised in that the casing is provided with a TWC heat shield (5) on the outside.

7. The catalyst assembly with the novel structure according to claim 1, wherein a pressure difference pipe is connected to the air inlet end cover and the air outlet end cover of the cylinder (11) respectively.

8. The catalytic converter assembly with the novel structure according to claim 7, wherein a pier is arranged at the end of the differential pressure pipe, and the differential pressure pipe is sealed with the connecting parts respectively arranged on the air inlet end cover and the air outlet end cover of the cylinder body (11) in a welding bulge mode.

9. The new structural catalyst assembly as set forth in claim 7, wherein the outer wall of the housing is provided with an adapter bracket for adjustably fixing the catalyst to the automobile; the outer wall of the cylinder body (11) is provided with a supporting frame for supporting the differential pressure pipe.

10. The catalyst assembly with a novel structure according to claim 1, wherein two pairs of hooks which are axially symmetrically arranged are fixed on the outer wall of the cylinder body (11).