CN217582280U

CN217582280U - Automobile three-way catalytic silencer

Info

Publication number: CN217582280U
Application number: CN202221822155.XU
Authority: CN
Inventors: 高玉娥; 陈海兵; 卢彬彬; 汤正东
Original assignee: Nanjing Automobile Group Corp; SAIC Maxus Vehicle Co Ltd Nanjing Branch
Current assignee: Nanjing Automobile Group Corp; SAIC Maxus Vehicle Co Ltd Nanjing Branch
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-10-14
Anticipated expiration: 2032-07-14

Abstract

The utility model relates to an automobile three-way catalytic silencer, which comprises an air inlet pipe, a silencing box, a three-way catalytic shell and an exhaust pipe which are sequentially connected along the exhaust direction, wherein an inner frame storage groove is arranged in the three-way catalytic shell, an inner frame for splicing a ceramic carrier is arranged in the inner frame storage groove, a sealing plate is arranged at one end of the inner frame close to the exhaust pipe, a conical outer pipe which extends outwards is welded along the central position of the sealing plate, and the conical outer pipe is connected with the exhaust pipe; a conical inner pipe is arranged in the conical outer pipe, and a plurality of exhaust pipes are uniformly distributed on the conical inner pipe; the three-way catalytic shell is connected with the sound-muffling box through a gas pipeline. The utility model discloses convenient to detach can change the inside carrier of three way catalyst converter, also conveniently clears up the impurity of inside to practice thrift the cost, overall structure's installation is stable firm simultaneously, the phenomenon that can not appear rocking improves life, reduces the replacement cost.

Description

Automobile three-way catalytic silencer

Technical Field

The utility model relates to an automobile three-way catalytic silencing device belongs to engine exhaust purification treatment technical field.

Background

The three-way catalyst is installed outside the automobile exhaust system and can convert harmful gas exhausted from automobile into harmless carbon dioxide, water and nitrogen via oxidation and reduction. 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 temperatures to water (H20) and carbon dioxide; NOx is reduced to nitrogen and oxygen. Three harmful gases are changed into harmless gases, so that the automobile exhaust can be purified; the three-way catalyst is widely applied in the field of automobile exhaust emission, but the existing three-way catalyst has single function, the carrier in the three-way catalyst is adopted to treat the exhaust, the silencing effect is poor, the shell of the existing three-way catalyst is welded and sealed, when the carrier in the three-way catalyst needs to be replaced or cleaned, the whole three-way catalyst needs to be replaced, the cost is high, the replacement is very complicated, and the operation and the use of people are inconvenient; when the conventional three-way catalyst is arranged on the bottom of an automobile, the three-way catalyst can shake due to long-time use and automobile use, the connection tightness is influenced, and the service life of the three-way catalyst is seriously influenced; therefore, the three-way catalytic silencer for the automobile is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome prior art's shortcoming, provide a rational in infrastructure, simple to operate, long service life's car three way catalytic muffler device.

In order to achieve the above purpose, the utility model discloses specific technical scheme as follows: a ternary catalytic silencing device for an automobile comprises an air inlet pipe (6), a silencing box (2), a ternary catalytic shell (1) and an exhaust pipe (10) which are sequentially connected along the exhaust direction, wherein an inner frame storage groove (17) is formed in the ternary catalytic shell, an inner frame (14) for inserting a ceramic carrier (15) is arranged in the inner frame storage groove, a sealing plate (8) is installed at one end of the inner frame, which is close to the exhaust pipe, an outwards-extending conical outer pipe (19) is welded along the center of the sealing plate, and the inner frame is connected with the exhaust pipe through the conical outer pipe; a conical inner tube (20) is arranged in the conical outer tube, a plurality of exhaust holes are uniformly distributed in the conical inner tube, and exhaust is performed through the exhaust holes, so that exhaust noise is reduced; the three-way catalytic shell is connected with the sound-muffling box through a gas transmission pipeline (22), the gas transmission pipeline is made of stainless steel materials, and tail gas in the sound-muffling box can be transmitted to the inside of the three-way catalytic shell through the gas transmission pipeline for purification.

Furthermore, the inner frame (14) is a hollow structure with one open end, and a sealing plate (8) is welded and fixed along the outer edge of the open end.

Furthermore, the sealing plate (8) is installed in a sealing groove (11) formed in the end portion of the inner frame storage groove (17) through bolts and a sealing gasket (18), and a plurality of threaded holes (12) for fixing are formed in the sealing groove.

Furthermore, the shape of the ceramic carrier (15) is matched with that of the inner frame, and the outer surface of the ceramic carrier is coated with a purifying agent layer consisting of noble metal and rare earth elements.

Furthermore, the two side edges of the three-way catalytic shell (1) and the silencing box (2) are welded with connecting fixing plates (3), the front side and the back side of each connecting fixing plate are symmetrically welded with a plurality of triangular reinforcing plates (4), and the connecting fixing plates are further provided with a plurality of fixing holes (5).

Furthermore, the connection fixing plate (3) is fixedly installed on a chassis of an automobile after penetrating through the fixing hole through a threaded rod, and the installation stability of the whole device is improved through the structure.

Furthermore, an air inlet pipe connecting flange plate (7) is welded at the end part of the air inlet pipe (6), and an exhaust pipe connecting flange plate (10) is welded at the end part of the exhaust pipe (9).

Furthermore, heat insulation layers (21) are arranged inside the three-way catalytic shell (1) and the sound muffling box (2), and are made of asbestos fiber felts and are 2-3 cm thick.

Furthermore, a plurality of sawtooth-shaped silencing grooves (16) are formed in two sides of the interior of the silencing box (2).

The utility model has the advantages that: the utility model provides a can not only carry out noise reduction to tail gas and can also carry out purification treatment to tail gas, let the more clean emission of tail gas, tail gas noise when also reducing the car and traveling, this three way catalyst converter can realize dismantling, can change the inside carrier of three way catalyst converter, also conveniently clear up the impurity of inside, thereby practice thrift the cost, very stable firm in the time of whole three way catalyst converter installation, the phenomenon that can not appear rocking improves life, reduce the replacement cost.

The utility model discloses rationally distributed and the cost of manufacture is low, is suitable for batch production, can satisfy the market demand that needs develop this work.

Drawings

Fig. 1 is a schematic view of the disassembly structure of the present invention.

Fig. 2 is an assembly structure diagram of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

Description of the drawings: 1-a three-way catalytic shell; 2-a sound silencing box; 3-connecting a fixed plate; 4-a reinforcing plate; 5-fixing holes; 6, an air inlet pipe; 7-the air inlet pipe is connected with a flange plate; 8-sealing plate; 9-an exhaust pipe; 10, connecting the exhaust pipe with a flange plate; 11-a seal groove; 12-a threaded hole; 13-bolt holes; 14-internal frame; 15-a ceramic support; 16-a silencing groove; 17-inner rack storage groove; 18-a seal gasket; 19-a tapered outer tube; 20-a tapered inner tube; 21-a thermal insulation layer; 22-gas transmission pipeline.

Detailed Description

Examples

The embodiment provides a three-way catalytic silencer for an automobile, and the structure of the three-way catalytic silencer is shown in figures 1-3. Comprises an outermost three-way catalytic shell 1 and a sound-deadening box 2 which are connected into a whole through a gas transmission pipeline 22 welded in the middle. The gas transmission pipeline is made of stainless steel materials, and tail gas in the sound muffling box can be transmitted to the inside of the three-way catalytic shell for purification treatment by the gas transmission pipeline.

The exhaust pipe 9 and the air inlet pipe 6 are respectively welded at two ends of the three-way catalytic shell and the muffling box, the end part of the air inlet pipe is connected with the engine through an air inlet pipe connecting flange 7, the end part of the exhaust pipe is welded and fixed with an exhaust pipe connecting flange 10, and the exhaust pipe is fixedly connected with the vehicle through the structure.

Meanwhile, an inner frame storage groove 17 is arranged in the three-way catalytic shell, an inner frame 14 used for inserting a ceramic carrier 15 is placed through the inner frame storage groove, a sealing groove 11 is formed in the end portion of the inner frame storage groove, and a plurality of threaded holes 12 are uniformly distributed along the circumferential direction of the sealing groove. A sealing plate 8 is arranged at one end of the inner frame close to the exhaust pipe, and a conical outer pipe 19 is fixed through welding by the sealing plate. The tip and the blast pipe 9 welded fastening of toper outer tube, its internally mounted have toper inner tube 20, and it has a plurality of exhaust holes still to distribute uniformly on the toper inner tube, utilizes the exhaust hole on the toper inner tube to exhaust to reduce the exhaust noise.

Because inner tower and closing plate welded fastening, and inner tower storage tank peg graft and link to each other, the closing plate then installs in the seal groove through bolt and sealed 18 that fills up, utilizes the closing plate that can dismantle, can take out the inside ceramic carrier of ternary catalytic shell at any time, and the convenience is changed the ceramic carrier or is cleared up the impurity on the ceramic carrier.

A plurality of saw-toothed silencing grooves 16 are arranged on two sides of the interior of the silencing box.

And heat insulation layers 21 made of asbestos fiber felts are respectively paved on the three-way catalytic shell and the inner wall of the sound-muffling box, and the thickness of the heat insulation layers is 2-3 cm.

Meanwhile, the three-way catalytic shell and two side edges of the sound-muffling box are both welded with a connecting fixed plate 3, the front surface and the back surface of the connecting fixed plate are also symmetrically welded with a plurality of triangular reinforcing plates 4, and the connecting fixed plate is also provided with a plurality of fixing holes 5. Through the cooperation of connecting fixed plate and threaded rod and using, fix ternary catalysis shell and whistle box on the chassis of car, improve the installation stability of whole device.

The working process of the embodiment is as follows: when the three-way catalytic shell is used, an air inlet pipe connecting flange 7 on an air inlet pipe 6 is connected with an engine, gas generated when the engine works is conveyed into the sound-deadening box 2 through the air inlet pipe 6, tail gas is subjected to sound deadening treatment through a plurality of sound-deadening grooves 16 on two sides inside the sound-deadening box 2, the tail gas is conveyed into the three-way catalytic shell 1 through a gas conveying pipeline 22 after sound deadening, the activity of three gases of CO, HC and NOx is enhanced through a purifying agent on the ceramic carrier 15, and certain oxidation-reduction chemical reaction is promoted to be carried out, wherein the CO is oxidized into colorless and nontoxic carbon dioxide gas at high temperature; HC compounds are oxidized at high temperature to water and carbon dioxide; NOx is reduced into nitrogen and oxygen, three harmful gases are changed into harmless gases, automobile exhaust is purified, the exhaust enters the conical inner pipe 20 after passing through the ceramic carrier 15, is discharged to the conical outer pipe 19 through the exhaust holes in the conical inner pipe 20 and is conveyed out through the conical outer pipe 19, and noise generated during exhaust is reduced again. When the ceramic carrier 15 inside the three-way catalytic shell 1 needs to be replaced or impurities on the ceramic carrier 15 need to be cleaned, the bolts on the sealing plate 8 are firstly disassembled, then the inner frame 14 and the ceramic carrier 15 are taken out from the three-way catalytic shell 1, then the impurities on the ceramic carrier 15 are cleaned or the ceramic carrier 15 is replaced, the operation is simple and convenient, and the purifying effect is improved. And when the three-way catalytic converter is installed, the threaded rod penetrates through the fixing hole 5 and is fixed through the nut, the integral stability and hardness are improved by the aid of the connecting fixing plate 3 and the reinforcing plate 4, and the service life of the three-way catalytic converter is prolonged.

This three way catalyst converter is functional strong, can not only carry out noise reduction to tail gas and can also carry out purification treatment to tail gas, let the more clean emission of tail gas, also reduce the tail gas noise when the car goes, this three way catalyst converter can realize dismantling, can change the inside carrier of three way catalyst converter, also conveniently clear up the impurity of inside, thereby practice thrift the cost, very stable firm in the time of whole three way catalyst converter installation, the phenomenon that can not appear rocking, and the service life is prolonged, and the replacement cost is reduced.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. The utility model provides an automobile three way catalytic muffler device, includes along intake pipe (6), whistle box (2), three way catalytic shell (1) and blast pipe (9) that the exhaust direction connects gradually, its characterized in that: an inner frame storage groove (17) is formed in the three-way catalytic shell, an inner frame (14) for inserting a ceramic carrier (15) is arranged in the inner frame storage groove, a sealing plate (8) is installed at one end, close to the exhaust pipe, of the inner frame, a conical outer pipe (19) extending outwards is welded along the center of the sealing plate, and the inner frame is connected with the exhaust pipe through the conical outer pipe; a conical inner pipe (20) is arranged in the conical outer pipe, and a plurality of exhaust pipes are uniformly distributed on the conical inner pipe; the three-way catalytic shell is connected with the sound-deadening box through a gas transmission pipeline (22).

2. The automotive three-way catalytic muffler device according to claim 1, wherein: the inner frame (14) is of a hollow structure with an opening at one end, and a sealing plate (8) is welded and fixed along the outer edge of the opening end of the inner frame.

3. The automotive three-way catalytic muffler device according to claim 2, wherein: the sealing plate (8) is installed in a sealing groove (11) formed in the end part of the inner frame storage groove (17) through bolts and a sealing gasket (18), and a plurality of threaded holes (12) for fixing are formed in the sealing groove.

4. The automotive three-way catalytic muffler device according to claim 1, wherein: the shape of the ceramic carrier (15) is matched with that of the inner frame, and the outer surface of the ceramic carrier is coated with a purifying agent layer.

5. The automotive three-way catalytic muffler device according to claim 1, wherein: the three-way catalytic reactor is characterized in that connecting fixing plates (3) are welded on two side edges of the three-way catalytic shell (1) and the silencing box (2), a plurality of triangular reinforcing plates (4) are symmetrically welded on the front side and the back side of each connecting fixing plate, and a plurality of fixing holes (5) are further formed in each connecting fixing plate.

6. The automotive three-way catalytic muffler device according to claim 5, wherein: the connecting and fixing plate (3) penetrates through the fixing hole through a threaded rod and then is fixedly installed on a chassis of the automobile.

7. The automotive three-way catalytic muffler device according to claim 1, wherein: the welding of the tip of intake pipe (6) has intake pipe connection ring flange (7), the welding of the tip of blast pipe (9) has blast pipe connection ring flange (10).

8. The automotive three-way catalytic muffler device according to claim 1, wherein: and heat insulation layers (21) are arranged inside the three-way catalytic shell (1) and the sound muffling box (2), and are made of asbestos fiber felts and have the thickness of 2-3 cm.

9. The automotive three-way catalytic muffler device according to claim 1, wherein: the two sides of the interior of the sound deadening box (2) are provided with a plurality of sawtooth-shaped sound deadening grooves (16).