CN205714369U - A kind of catalytic muffler - Google Patents

Abstract

The utility model discloses a catalytic muffler, which comprises a shell, an air intake pipe, a nozzle seat and a tail pipe, an air intake pipe is arranged at one end of the shell, a nozzle seat is arranged above the air intake pipe, a tail pipe is arranged at the other end of the shell, the air intake pipe, the nozzle seat and the shell The gap between them is sealed by the front end cover, and the gap between the tail pipe and the casing is sealed by the rear end cover. The inner cavity of the casing is provided with a partition A, a partition B and a partition C, and the center of the partition A and the partition B One end of the air inlet muffler pipe is fixed at the positions, the SCR assembly is installed in the gap between the partition B and the partition C, and one end of the outlet muffler pipe is fixed at the center of the partition C. The catalytic muffler organically integrates the nozzle, purifier and muffler device, which greatly reduces the cost. At the same time, the purification part is placed in the cavity without direct contact with the outside world, which protects the carrier well and effectively reduces the exhaust gas. The content of NOx and PM in the vehicle meets the National V emission regulations, which makes the layout of the vehicle chassis simple.

Description

A sort of Catalytic muffler

technical field

The utility model relates to the technical field of mufflers, in particular to a catalytic muffler.

Background technique

The muffler is a device that allows airflow to pass through, but can prevent or reduce sound transmission, and is an important measure to eliminate aerodynamic noise. The muffler can block the propagation of sound waves and allow airflow to pass through, which is an effective tool for noise control. There are many types of mufflers, but the muffler mechanism can be divided into six main types, namely resistive muffler, resistive muffler, impedance composite muffler, micro-perforated plate muffler, small hole muffler and active muffler.

At present, the after-processor assembly of diesel vehicles is widely used, and its function meets the requirements of GB17691-2005 and QC/T 631-2009 standards, but it does not meet the upcoming National V emission regulations.

Utility model content

The purpose of this utility model is to provide an organic integration of nozzle, purifier and muffler device, which greatly reduces the cost. At the same time, the purification part is placed in the cavity without direct contact with the outside world, and the carrier is well protected. At the same time, the content of NOx and PM in the exhaust gas is effectively reduced to meet the National V emission regulations, thereby making the chassis layout of the whole vehicle simple, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a catalytic muffler, including a casing, an air inlet pipe, a nozzle seat and a tailpipe, the casing is a hollow cylindrical columnar structure, one end of the casing is provided with an air inlet pipe, and a nozzle is arranged above the air inlet pipe The other end of the casing is provided with a tailpipe. The gap between the intake pipe, the nozzle seat and the casing is sealed by the front end cover, and the gap between the tailpipe and the casing is sealed by the rear end cover. The inner cavity of the casing is from the connection side of the intake pipe to the The connecting side of the tailpipe is provided with partition A, partition B and partition C in sequence, and the center positions of partition A and partition B are respectively fixed with one end of the intake muffler pipe, and the gap between partition B and partition C is An SCR assembly is provided, and one end of the outlet muffler pipe is fixed at the center of the partition C, and the other end of the outlet muffler pipe is connected to the tailpipe.

Preferably, the air intake muffler is a cylindrical structure with a mixer inside.

Preferably, the SCR assembly includes a DOC housing, a catalyst and a liner. The DOC housing is a cylindrical structure, and the outside is in close contact with the side wall of the inner cavity of the casing. The catalyst is filled inside the DOC housing, and the DOC housing and The gaps between the shells are filled with gaskets.

Preferably, the central axis of the nozzle seat and the central axis of the housing form an included angle of 5°-20°.

Preferably, a temperature sensor base is fixedly arranged on the side wall of the housing between the partition B and the SCR assembly.

Preferably, a NOx sensor base is fixedly arranged on the shell side wall between the SCR assembly and the partition C.

Preferably, a flange is also included, and the flange is welded on the outer edge of the intake pipe

Compared with the prior art, the beneficial effect of the utility model is: the catalytic muffler designed by the utility model organically integrates the nozzle, the purifier and the muffler device, which greatly reduces the cost, and at the same time, the purification part is placed in the cavity , without direct contact with the outside world, which protects the carrier well, and effectively reduces the content of NOx and PM in the exhaust gas to meet the National V emission regulations, thus making the layout of the vehicle chassis simple.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1, the utility model provides a technical solution: a catalytic muffler, including a shell 1, an air intake pipe 2, a nozzle seat 3 and a tailpipe 4, the shell 1 is a hollow cylindrical columnar structure, and one end of the shell 1 is provided with an inlet Nozzle seat 3 is set above air pipe 2 and air intake pipe 2, tailpipe 4 is set at the other end of shell 1, the gap between air intake pipe 2, nozzle seat 3 and shell 1 is sealed by front end cover 5, the gap between tail pipe 4 and shell Sealed by the rear end cover 6, the inner cavity of the shell 1 is sequentially provided with a partition A 7, a partition B 8 and a partition C 9 from the side where the intake pipe 2 is connected to the side where the tail pipe 4 is connected, and the partition A 7 and the One end of the intake muffler pipe 10 is fixed at the center of the partition B8, the SCR assembly 11 is installed in the gap between the partition B8 and the partition C9, and the outlet muffler pipe is fixed at the center of the partition C9 12 one ends, the other end of the air outlet muffler pipe 12 is connected with the tailpipe 4.

At the same time, the intake muffler pipe 10 is a cylindrical structure with a mixer 13 inside. The SCR assembly 11 includes a DOC housing 14, a catalyst 15 and a gasket 16. The DOC housing 14 is a cylindrical structure, the outside of which is in close contact with the side wall of the inner cavity of the casing 1, and the catalyst 15 is filled inside the DOC housing 14. The DOC housing 14 The gap between 14 and the shell 1 is filled with a gasket 16 . The central axis of the nozzle seat 3 and the central axis of the housing 1 form an included angle of 5°-20°. A temperature sensor base 17 is fixedly arranged on the side wall of the casing 1 between the partition B 8 and the SCR assembly 11 . A NOx sensor base 18 is fixedly arranged on the side wall of the housing 1 between the SCR assembly 11 and the partition C 9 . It also includes a flange 19 welded to the outer edge of the intake pipe 2 . The catalytic muffler organically integrates the nozzle, purifier and muffler device, which greatly reduces the cost. At the same time, the purification part is placed in the cavity without direct contact with the outside world, which protects the carrier well and effectively reduces the exhaust gas. The content of NOx and PM in the vehicle meets the National V emission regulations, which makes the layout of the vehicle chassis simple.

Through repeated experiments, it can be found that under all working conditions of the engine, the emission after purification: NOx is 1.92g/kWh, HC is 0.033g/kWh, PM is 0.018g/kWh, CO is 0.03g/kWh, and the insertion loss is 18.5~ 20.3dB(A), the exhaust back pressure difference is 16.5.4~21.5kPa; the power loss ratio is 0.3~1.67%.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (7)

1. a catalytic muffler, it is characterized in that: include shell, air inlet pipe, nozzle carrier and tail pipe, described shell is hollow cylinder column structure, shell one end is provided with air inlet pipe, air inlet pipe is provided above nozzle carrier, the described shell other end arranges tail pipe, and between described air inlet pipe, nozzle carrier and shell, gap carries out airtight by drive end bearing bracket, and between described tail pipe and shell, gap carries out airtight by rear end cap；Described enclosure cavity connects side from air inlet pipe and is disposed with dividing plate A, dividing plate B and dividing plate C to tail pipe connection side, the center of described dividing plate A and dividing plate B is respectively fixed with intake noise reduction pipe one end, between described dividing plate B and dividing plate C, gap is provided with SCR assembly, the center of described dividing plate C is fixedly installed hush tube one end of giving vent to anger, described in the give vent to anger hush tube other end and tail pipe turn on.

A kind of catalytic muffler the most according to claim 1, it is characterised in that: described intake noise reduction pipe is cylindrical structure, is internally provided with blender.

A kind of catalytic muffler the most according to claim 1, it is characterized in that: described SCR assembly includes DOC housing, catalyst and liner, described DOC housing is cylindrical structure, outside is close to shell inner cavity sidewall, described catalyst is filled in DOC enclosure interior, and between described DOC housing and shell, gap is filled with liner.

A kind of catalytic muffler the most according to claim 1, it is characterised in that: the axis of described nozzle carrier central shaft and shell is the angle of 5 ° ~ 20 °.

A kind of catalytic muffler the most according to claim 1, it is characterised in that: it is fixedly installed temperature sensor base on the side wall of outer shell between described dividing plate B and SCR assembly.

A kind of catalytic muffler the most according to claim 1, it is characterised in that: it is fixedly installed NOx sensor base on the side wall of outer shell between described SCR assembly and dividing plate C.

A kind of catalytic muffler the most according to claim 1, it is characterised in that: also include that flange, described flange welding are connected to air inlet pipe outer ledge.