CN88210325U

CN88210325U - Device for purifying and deafening automobile exhaust

Info

Publication number: CN88210325U
Application number: CN198888210325U
Authority: CN
Inventors: 高峰; 高颖画
Original assignee: GUANGMING MECHANICAL FITTINGS FACTORY SHENYANG
Current assignee: GUANGMING MECHANICAL FITTINGS FACTORY SHENYANG
Priority date: 1988-03-21
Filing date: 1988-03-21
Publication date: 1988-11-30

Abstract

The utility model discloses an automobile engine exhaust treating device with the action of purifying and silencing, comprising an inner cylinder and an outer cylinder. A thermal insulation cavity is formed between the inner cylinder and the outer cylinder, and the inner cylinder is uniformly provided with honeycomb-like or rare-earth ball catalysts at intervals. The essential structure is that an air outlet is provided with a silencer with the function of guiding flow and silencing the high frequency noise, so the sound silencing effect is evident and the tone color of the residual noise is better.

Description

Device for purifying and deafening automobile exhaust

The utility model is a kind of automobile engine to exhaust treatment device that purifies double noise elimination effect that has, and includes inside and outside tube, forms heat-insulation chamber between inner/outer tube, evenly is placed with cellular (or rare earth ball) catalyzer in inner core at interval.

The Chinese patent CN85202176(day for announcing 870730) described a kind of device close with the utility model, its structure as shown in Figure 1.Its deficiency is: the inner core port band conflux of giving vent to anger closes up, and putting though the cavity between place, air outlet inner/outer tube is big has acoustical panel, can produce regenerated noise and bad residual noise tone color unavoidably.

The purpose of this utility model just is to provide a kind of improved automobile engine to exhaust treatment device that purifies double noise elimination effect that has, and it can overcome the deficiency of above-mentioned known technology.

The purpose of this utility model is achieved in that more above-mentioned known technology, and its main points are: the inner core port of giving vent to anger does not have conflux and closes up, and is connected in the inner core port of giving vent to anger, and gives vent to anger at inner/outer tube a silencing apparatus is installed between port cavity.This silencing apparatus is made up of the honeycomb lid of-conflux tube and this conflux tube expansion end of capping.The flow process of exhaust is: go into suction port → inner core → catalyzer → inner core exhaust port → silencing apparatus and discharge.

Because the honeycomb of silencing apparatus is stamped micropore expansion noise elimination effect, the conflux tube has guide functions, so the utility model exhaust is smooth and easy, the noise elimination effect is obvious, and the residual noise tone color is better.

Example of the present utility model is provided by the

following drawings

1,2, in conjunction with detailed description the utility model.

Fig. 1 is a kind of concrete structure schematic representation of the utility model.

Fig. 2 is a silencing apparatus schematic representation of the present utility model shown in Figure 1.

Among the figure, 1-suction port, 2-air inlet expansion cavity, 3-catalyzer, the little expansion cavity of 4-, 5-heat-insulation chamber, 6-expansion cavity, 7-inner core, 8-silencing apparatus, 9-air outlet, 10-urceolus, 11-conflux tube, 12-honeycomb lid.

According to Fig. 1, the utility model comprises inside and outside tube 7,10,7,10 in inside and outside tube forms heat-insulation chamber 5, suction port 1 is by inner core 7 inlet end interruption-formings, place cellular (or rare earth ball) catalyzer 3 and guarantee to leave in the inner core 7 air inlet expansion cavity 2 and expansion cavity 6 at 7 li evenly at interval little expansion cavities 4 of inner core, it is characterized in that: be connected give vent to anger port or title expansion cavity 6 outer ends in inner core 2, giving vent to anger at inside and outside tube 7,10 is equipped with silencing apparatus 8 between port cavity.With reference to figure 2, silencing apparatus 8 is made up of the honeycomb lid 12 of conflux tube 11 and sealing cover conflux tube 11.Conflux tube 11 the most handy quieter materials are manufactured, can also reach noise elimination (elimination high-frequency noise) effect.As seen from Figure 1, exhaust process has been passed through a series of micropore expansion noise elimination processes: suction port 1 → air inlet expansion cavity 2, catalyzer 3 → micropore expansion cavity 4 or expansion cavity 6, honeycomb lid 12 → air outlet 9.

Above-mentioned example is more tangible through experimental verification exhaust gas purification noise elimination effect: during 300 ℃ of delivery temperatures, purification ratio CO is greater than 90%, and HC can reach 75%, and noise is less than 80 decibels.

Claims

1, automobile exhaust gas purifying silencing apparatus, comprise inside and outside tube 7,10, before placing cellular (or rare earth ball) catalyzer 3,7 li evenly at interval little expansion cavities 4 of inner core guarantee to leave air inlet expansion cavity 2 and expansion cavity 6 in the inner core 7, it is characterized in that: be connected expansion cavity 6 outer ends in inner core 7, giving vent to anger at inside and outside tube 7,10 is equipped with silencing apparatus 8 between port cavity.

2, by the said purifying muffler of claim 1, it is characterized in that: silencing apparatus 8 is made up of the honeycomb lid 12 of conflux tube 11 and capping conflux tube 11 expansion ends.

3, by claim 1 or 2 said purifying mufflers, it is characterized in that: conflux tube 11 is that quieter material is manufactured.