CN2091357U

CN2091357U - Automobile waste gas purification dissipative muffler

Info

Publication number: CN2091357U
Application number: CN91210748U
Authority: CN
Inventors: 陈本成
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-17
Filing date: 1991-06-17
Publication date: 1991-12-25

Abstract

The utility model relates to an automobile waste gas purification dissipative muffler. An air inlet pipe is composed of a cylinder barrel body of which both ends are provided with end covers, connecting tubes for air inlet and the outlet pipe of the other end, two front and back spacer plates in the barrel body to form three chambers, the connecting tubes for air inlet, inside and outside air inlet pipes and a silencing shield. An exhaust pipe is composed of the silencing shield and the inner and outer exhaust pipes and outlet pipes. The front spacer plate is provided with two symmetrical air-return pipes to cause the three chambers in the barrel body to become a smoke abatement catalytic purification anechoic chamber, an exhaust gas catalytic purification smoke abatement chamber and a catalyst exhaust gas surge chamber on the catalyzing bed of the two chambers. The utility model has the advantages of good clarification and sound deadening effect of automobile waste gas and favorable performance, and the problems of noise and harmful gas pollution produced by the automobile waste gas can be solved ideally.

Description

Automobile waste gas purification dissipative muffler

A kind of purifying vehicle exhaust silencing apparatus is used for the tail gas clean-up of various light, heavy trucks, dormeuse and reduces the venting gas appliance of pneumatic noise.

Employed silencing apparatus on the present various automobile only has the noise contributions that is produced when eliminating motor vehicle emission tail gas, and the function that tail gas is not purified.Containing harmful gases (diesel-engined vehicle is particularly serious) such as a large amount of CO and HC in the tail gas of motor vehicle emission is pollution sources main in the atmosphere, and the human beings'health and the ecological balance are had great harm.Solving vehicle exhaust has been the important topic of a current common concern to the pollution problem of environment.

Present automobile both domestic and external, in order to solve its exhaust emissions problem, except that the fuel performance that improves motor, it is the exhaust gas cleaner of catalyzer that major part has also adopted with metals such as platinum or rare earths, effect is preferably arranged, but its complex structure, manufacture cost height, and power loss is also bigger.

A large amount of research has also been done by domestic many departments aspect purifying vehicle exhaust, but it is all undesirable to purify the noise elimination effect.As China Patent No. is in the disclosed purification silencer of CN88210325, adopted the filtration, purification mode of multidisc ceramic honeycomb catalyzer, its deficiency is: the catalytic amount multilayer of this type of purifying muffler is thick, exhaust resistance is big, when purifying for diesel-engined vehicle tail gas, cellular catalyst surface can produce more carbon deposit, the micropore of catalyzer is stopped up, easily produce exhaust smooth, reduce engine power efficient, improve oil consumption and increase problems such as noise, and manufacture cost height (only the cost of catalyzer then is 200 a yuan/platform).Therefore practicability is not good, is not suitable for bavin engine automobile again especially).This device is through trying out and measure on the engine automobile again at vapour, and its power loss ratio is 12%, CO purification ratio＜80%, HC purification ratio＜70%, noise are 86dB(A).

In order to overcome the deficiency of above-mentioned technology, the purpose of this utility model is to propose a kind of purification efficiency height that is applicable to various vapour, diesel-engined vehicle tail gas, engine power loss is than low, and can purify simultaneously, the multi-purpose vehicle(MPV) exhaust gas processing device of noise elimination, fuel-economizing.

Task of the present utility model realizes by following technological scheme: it is by a cylindrical tube, two ends have and have inlet pipe connection 1 and steam outlet pipe 11 on end cap, the end cap respectively, it is characterized in that in the cylindrical tube by two preceding dividing plates 16 and rear bulkhead 13 that are fixed on cylinder inboard wall, three spaces that separate by dividing plate, be noise reduction catalytic purification chamber I, exhaust noise silencing catalyst chamber II, and tail gas buffer cell III, the suction tude that constitutes by the pipe 3 and the silencer cover 6 of taper in the air inlet of inlet pipe connection 1, air inlet outer tube 4 and concentric axis thereof; Be fixed on barrel front end lid 20 and the preceding dividing plate 16; By the silencer cover of taper, in exhaust outer tube 15 and the concentric axis exhaust thereof pipe 14 and giving vent to anger connect and compose outlet pipe be fixed on before dividing plate 16, on rear bulkhead 13, the cylinder back-end lid 12.On pipe 3 and the taper silencer cover 6, uniform small through hole interlocks in the air inlet; Staggered uniform small through hole on one section outlet pipe of pipe 14 and buffer cell III in the exhaust.Be provided with two mufflers 7 of symmetry on preceding dividing plate 16, muffler 7 is the contraction bore at an end of smoke-eliminating purifying anechoic chamber II, staggered uniform small through hole on the tube wall; Be provided with square guard 8 in that air inlet noise reduction, catalytic purification I and exhaust noise silencing catalytic purification II are indoor, the inside is filled up on the support that rare earth catalyst wraps in the fixed plate 19 with pull bar 18, pull bar 18 all be welded on the air inlet outer tube 4 respectively with fixed plate 19 and exhaust outer tube 15 on.

After the connecting tube 1 of suction tude is connected with automobile exhaust pipe and fixes, the tail gas that motor car engine is discharged enter inlet pipe connection 1 enter by bearing support 2 be bearing on the front cover 20 air inlet outer tube 4 and lead to before dividing plate 16 by bearing support 5 supportings with fixing after be connected taper silencer cover 6 again, carry out first order noise reduction, staggered uniform small through hole in taper silencer cover 6 surface wherein, be subjected to the effect that the acoustic energy table subtracts and reduce frequency in the annular pass of air-flow between inlet pipe connection and inside and outside suction tude, again through not only can noise reduction but also can slightly directly enter catalytic purification chamber I after the supercharging in the taper silencer cover 6 of conflux, the catalytic bed of catalytic purification chamber, constitute by square guard 8, the full granular rare earth catalyst 9 of inner filling, and be fixed on by pull bar 18, on the support that fixed plate 19 is made, the gas that contains CO and HO carries out to a certain degree adsorption cleaning in purifying chamber's I through catalyzer, catalyzer also can absorb a part of remaining acoustic energy simultaneously, the staggered muffler 7 that all is covered with aperture before gas is fixed on through two symmetries more then on the dividing plate 16 is decayed again behind noise reduction and the baffling, enter catalytic purification chamber II and carry out the adsorption cleaning second time, gas behind the double purification is at last by the taper silencer cover, pipe 14 in bearing support 5 and 10 exhausts, after the noise reduction second time is carried out in the exhaust noise silencing chamber that exhaust outer tube 15 and steam outlet pipe 11 are formed, be discharged in the extraneous atmospheric layer and go, the posterior face of its exhaust outer tube 1 uniform small through hole that interlocks.In noise elimination second time process, because the smaller convergent-divergent section that formed of steam outlet pipe bore, for impacting because of conflux in this section, anti-overdraught produces noise, air-flow can enter the buffer cell III of being made up of cylindrical shell end cap 12 and rear portion dividing plate 13 through many small through hole at exhaust outer tube rear portion, discharge gradually after cushioning.

The utility model is that this purifying vehicle exhaust silencing apparatus has following advantage according to comparing with original technology that principle design such as fluid mechanics, chemistry and acoustics form:

1. simple in structure, low cost of manufacture, volume are little, in light weight.Compare with the device of CN88210325, its manufacture cost only is i.e. 40～50 yuan/platform of 17%() weight also only is its about 1/2nd;

2. quadric catalysis adsorption cleaning and structural type have been adopted with multistage noise reduction, solved not only that the exhaust resistance that is produced when the carbon deposit of honeycombed catalyst surface because of tail gas is big, the engine power loss in efficiency is big, oil consumption many and the high problem of exhaust noise, but also had tail gas clean-up performance preferably;

The utility model is through using in four kinds of vehicles such as east wind 140, CA141, golden cup 132, SY429 dormeuse and detecting, the conversion ratio of its CO is 89%, and the conversion ratio of HO is 70%, and power loss ratio is≤3%, noise is 83.2dB(A), but about about 10 liters of average per 100 km fuel-economizing;

3. the working life of catalyzer is more than 50,000 kilometers;

4. be applicable to the tail gas clean-up and the noise elimination of weight, light truck and the travelling passenger vehicle of various vapour, diesel engine.

Below in conjunction with accompanying drawing the utility model embodiment is described further.

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

In the accompanying drawings: 1. air inlet connecting tube, 2. bearing support, 3. pipe, 4. air inlet outer tube in the air inlet, 5. bearing support, 6. silencer cover, 7. muffler, 8. guard, 9. catalyzer, 10. supporting frame, 11. steam outlet pipes, 12. the cylinder back-end lid, 13. rear portion dividing plates, pipe in 14. exhausts, 15. the exhaust outer tube, 16. anterior dividing plates, 17. cylindrical shells, 18. pull bar, 19. fixed plates, 20. barrel front end lid.

I is the primary purification chamber, and II is the double purification chamber, and III is a buffer cell.

In the utility model, except that catalyzer, guard, bearing support, pull bar, fixed plate, all the other used component all are to be the A of 1.2mm by thickness ₃Steel plate is made, be welded after wherein pipe 3, air inlet outer tube 4, silencer cover 6, muffler 7, steam outlet pipe 11, the interior pipe 14 of exhaust and exhaust outer tube 15 are all rolled by steel plate in the air inlet, it is stamping forming that rear portion dividing plate 13, anterior dividing plate 16 and cylinder back-end cover 20 on 12 barrel front end lid, catalyzer in the catalytic bed is to be fixed on the support that is welded into by pull bar 18 and fixed plate 19 after packing tightly with steel wire guard 8, and this support is welded in respectively on air inlet outer tube 4 and the exhaust outer tube 15.All component are made back (comprising boring and part parts one less important assembly welding), after earlier air inlet anechoic chamber, exhaust noise silencing chamber and muffler 7 being welded as a whole with anterior dividing plate 16, again these parts are packed in the cylindrical shell 17, and the two ends, junction of anterior dividing plate and cylindrical shell are welded, be respectively charged into rear portion dividing plate 13, cylinder back-end lid 12 and suction tude 1 at last again, and after welding successively, promptly can be made into this purifying vehicle exhaust silencing apparatus.

The utility model now through the Changchun automotive research and the evaluation test that detects of national car mass supervision, it is as follows mainly to detect data:

Test result show purification of the present utility model eliminate the noise effective, function admirable, the noise and the harmful gas pollution problem that are produced in the time of can solving motor vehicle emission tail gas are suitable for the needs of China's communications and transportation career development more satisfactoryly.

Claims

1, a kind of purifying vehicle exhaust silencing apparatus, comprise by cylindrical tube two ends and have end cap, have inlet pipe connection and steam outlet pipe on the end cap, it is characterized in that: cylindrical tube is interior by two preceding dividing plate and rear bulkheads that are fixed on cylinder inboard wall, three spaces that separated by dividing plate are air inlet noise reduction catalytic purification chamber I, exhaust noise silencing catalytic purification chamber II and tail gas buffer cell III, by inlet pipe connection, the suction tude that the silencer cover of pipe and taper constitutes in the air inlet of air inlet outer tube and concentric axis thereof, be fixed on barrel front end lid and the preceding dividing plate, silencer cover by taper, the outlet pipe that pipe and steam outlet pipe constitute in exhaust outer tube and the concentric axis exhaust thereof, be fixed on preceding dividing plate, rear bulkhead is to the housing rear end cover, in the air inlet, staggered uniform full small through hole on outer tube and the taper silencer cover, in the exhaust, staggered uniform full small through hole on the wall of outer tube and taper silencer cover, on preceding dividing plate, be provided with two mufflers of symmetry, muffler is at the mouth warp of an end for shrinking of purifying silencing chamber II, staggered uniform small through hole on the tube wall, I chamber and II chamber are provided with square guard, and its solid rare earth catalyst places and is fixed on into, on the catalytic bed on the support on the exhaust outer tube.

2, purifying vehicle exhaust silencing apparatus according to claim 1 is characterized in that suction tude and outlet pipe are respectively to pass front cover, preceding dividing plate, fix with preceding dividing plate rear bulkhead, rear end cover and Weld-supporting frame.