CN2093905U

CN2093905U - Automotive exhaust cleaning, spark-extinguishing and silencing apparatus

Info

Publication number: CN2093905U
Application number: CN 91210837
Authority: CN
Inventors: 张文宗; 陈本成
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-07-09
Filing date: 1991-07-09
Publication date: 1992-01-22

Abstract

The utility model relates to an automotive exhaust cleaning, spark-extinguishing and silencing apparatus. An air inlet surge chamber, an air inlet silencing and catalytic purification chamber, a spark-extinguishing silencing and catalytic purification chamber and a spark-extinguishing exhaust gas sound attenuation surge chamber are composed of a casing with an exhaust gas connecting tube, an exhaust tube, an elliptical head and a rear-end plate and a front spacer plate, a middle spacer plate and a back spacer plate in the casing which are respectively fixed with a silencer, a spark-extinguishing silencer, a spark-extinguishing exhaust silencer and provided with a catalyst bed. The utility model has the advantages of favorable functions of exhaust cleaning, spark-extinguishing and silencing, simple structure, small size and light weight. The utility model is especially suitable for the automotive exhaust cleaning, spark-extinguishing and silencing apparatus of the gasoline in the strict flame proof areas and the camions and travelling vehicles with diesel engines.

Description

Automotive exhaust cleaning, spark-extinguishing and silencing apparatus

The tail gas clean-up of a kind of truck that is used for various vapour, diesel engine, dormeuse and reduce noise, and purifying vehicle exhaust, spark-extinguishing and silencing apparatus with multiple functions such as back-fire relief and fuel-economizings.

During automobile last person gas, not only can produce bigger noise, but also have harmful gases such as a large amount of CO and HC, environment has been caused serious pollution and the human health and the ecological balance are had great harm.Therefore a large amount of research is being done by domestic and international many departments aspect purifying vehicle exhaust and the noise reduction at present, but it is all undesirable to purify the noise elimination effect, also exists deficiencys such as power loss ratio is big, function is few.The application number of inventor design is that 91210748.0 purifying vehicle exhaust silencing apparatus utility application is to have adopted the working principle of quadric catalysis adsorption cleaning and multistage noise elimination, supervise the survey of inspection center through national car mass and look and on multiple vehicle, use checking, all obtained actual effect preferably at aspects such as purification, noise reduction, power loss, energy consumptions, but owing to do not possess the back-fire relief function, so can not satisfy the needs that forest etc. has the fire protection requirement area.

The purpose of this utility model be propose a kind ofly to be applicable to that having of various areas fire prevention such as (particularly regional) forests and various vapour, diesel-engined vehicle can purify simultaneously, noise elimination, fuel-economizing and the multiple function of back-fire relief, and the purification efficiency height, the vehicle exhaust multifunction silencer that power loss is low.

The utility model comprises by having tail gas connecting tube 1, the housing 4 of suction tude 3 and tail gas exhausting pipe 17, be provided with the anterior dividing plate 7 that is fixed on housing 4 inwalls in the housing 4, intermediate membrane 11, rear portion dividing plate 15, the housing front end is an ellipse head 2, the other end is a rear-end plate 16, forwardly dividing plate 7 is provided with silencing apparatus, on intermediate membrane 11, be provided with spark-extinguishing and silencing apparatus, on rear portion dividing plate 15, be provided with the back-fire relief exhaust silencer, intermediate membrane 11 is left the catalytic bed that some gaps are provided with catalyzer with rear portion dividing plate 15, constituted air inlet buffer cell I intake noise reduction and catalytic purification chamber II, back-fire relief is eliminated the noise and the catalytic purification III, the exhaust back-fire relief is eliminated the noise and exhaust buffer cell IV.Baffler on suction tude 3 dividing plates in the housing 4, the noise reduction flame trap, the axis of the back-fire relief muffler on rear portion dividing plate 15 and the rear end cover is the parallel lines that stagger mutually.After connecting tube 1 is connected with automobile exhaust pipe and fixes, the gas that contains elements such as CO and HO that motor car engine is discharged then enters by ellipse head 2 through the suction tude 3 of connecting tube 1 and surperficial uniform Φ 2.5 apertures, the air inlet buffer cell I that housing 4 and anterior dividing plate 7 are formed, gas is subjected to buffering and acoustic energy attenuation in this chamber after, enter again be fixed on the anterior dividing plate by guided wave core pipe 5, stiffening plate 6 and outer tube 8 made air inlet anechoic chambers carry out first order noise reduction, uniform aperture wherein interlocks on guided wave core pipe 5 and the surface, outer tube 8 front end and back end, can be subjected to once more sound energy attenuation in the annular pass of air-flow between core pipe and two pipes and reduce frequency effect, and by the contraction mouth conflux of outer tube 8 with slightly directly enter catalytic purification chamber II after the supercharging, catalytic bed in the catalytic purification chamber is covered with the semicircle 10 that the end plate 10 of Φ 2.5 apertures forms by intersecting parallels bearing support 9 and two the flat box of lattice, being filled with granular rare earth catalyst (this structure can prevent catalyst abrasion) in each lattice also is fixed on this catalytic bed on the front end inlet tube outer wall of back-fire relief silencer casing 13, and and intermediate membrane 11 between leave the 10mm gap, can increase the purification area like this, the gas that contains CO and HO in purifying chamber's II when catalyzer carries out to a certain degree adsorption cleaning, catalyzer also can absorb a part of remaining acoustic energy, gas enters catalytic purification chamber III through carrying out second level noise reduction behind the spark-extinguishing and silencing apparatus that is provided with two-layer 12 purpose filter screens 12 more then, in the back-fire relief baffler, its filter screen can stop the inflammable matter in the gas to pass through, thereby played the back-fire relief effect, filter screen also can change the air-flow audio frequency simultaneously, in the III of catalytic purification chamber, still be provided with one with purifying chamber's II in identical catalytic bed 14, this catalytic bed is fixed on the rear portion dividing plate 15, gas is at this indoor adsorption cleaning second time that carries out, in twice purification process, because the effect of baffling and back-fire relief, the temperature of the high-temperature gas that motor is discharged is distributed slower, catalyzer is played the preheating insulation effect, improved catalyticing purifying effect.Air-flow is after second adsorption purifies, undertaken being discharged in the ambient atmosphere after the third level noise reduction and go by being fixed on the exhaust spark-extinguishing and silencing apparatus of forming by two-layer 12 purpose filter screens and tail gas exhausting pipe 17 on rear portion dividing plate 15 and the rear-end plate 16 at last, uniform Φ 3.5 apertures in the middle part of its tail gas exhausting pipe, because it is smaller that this manages terminal bore, form the convergent-divergent section, air-flow when preventing exhaust is accelerated to produce impact noise because of flow velocity in this section, so gas can be managed supermedial Φ 3.5 holes by this and entered the buffer cell IV of being made up of rear portion dividing plate 15 and rear-end plate 16 and store discharge gradually after the buffering.

The utility model compared with prior art has following main feature:

1. simple in structure, volume is little, in light weight.

2. beyond the structural type that adopts quadric catalysis agent adsorption cleaning and multistage noise reduction, also increased the diameter of air inlet and exhaust piper and each hush pipe, and ellipsoidal head, increased reservoir volume, reduced exhaust resistance, improve the dynamic efficiency of motor, but also had tail gas clean-up performance preferably.

3. have the back-fire relief function, can satisfy at the needs that the fire protection requirement area is arranged.

4. ellipsoidal head has been adopted in this device front portion, has not only increased intensity, and cleanliness is good, the resistance in the time of can reducing automobile and advance.

5. catalyzer working life is more than 50,000 kilometers.

6. be applicable to the truck of various vapour, diesel engine, the tail gas clean-up and the noise elimination of dormeuse.

The utility model is through using on vehicles such as east wind 140, CA141, golden cup 132, Beijing 130 and detecting, the conversion ratio of its CO is 89%, HC's is 75% than the change rate, power loss ratio is below 3%, noise is 82.8db(A), average per 100 km can be saved with about 1.8 liters of oil, uses on diesel-oil vehicle in addition, and its smoke intensity can descend 36%.

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

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

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

Accompanying drawing 3 is Figure 1B-B sectional view.

In the accompanying drawings:

1. connecting tube 2. ellipse heads 3. air inlet core pipes 4. housings 5. guided wave core pipes 6. stiffening plates 7. anterior dividing plate 8. outer tubes 9. cross form bearing supports 10. end plates 11. intermediate membrane 12. filter screens 13. shells 14. catalytic beds 15. rear portion dividing plates 16. rear-end plates 17. tail gas exhausting pipe I are that air inlet buffer cell II is that primary purification chamber III is that double purification chamber IV is the exhaust buffer cell.

The utility model is except that catalyzer, and all parts all are to be the A of 1.2mm with thickness ₃Steel plate is made, wherein ellipse head 2 and each dividing plate; Rear-end plate is stamping forming, and cylindrical shell 4 and each Guan Jun are welded after being rolled by steel plate, catalytic bed then is after earlier a semicircle end plate and cross form bearing support 9 being welded as a whole, to fill up pellet type catalyst in 10 grids in the bearing support 9 again, preferably cover with the semicircle end plate of another piece again and the soldering and sealing periphery gets final product.After all component are made separately, earlier connecting tube 1, suction tude 3 and ellipse head 2, behind admission air silencer and anterior dividing plate 7, back-fire relief baffler and catalytic bed and intermediate membrane 11, exhaust silencer and the difference assembly weldings such as catalytic bed 14 and rear portion dividing plate 15, pack into successively again in the housing 4, and with after each dividing plate and the housing firm welding, reinstall rear-end plate 16, and after welding with tail gas exhausting pipe 17 and cylindrical shell 4 respectively, promptly can be made into this purifying vehicle exhaust spark-extinguishing and silencing apparatus.

The utility model is supervised inspection center's test by national car mass at present, and its key data is as follows:

Test result shows the utlity model has and purifies the noise elimination effect preferably, the noise and the harmful gas pollution problems that are produced in the time of can solving motor vehicle emission tail gas more satisfactoryly.

Claims

1, a kind of purifying vehicle exhaust, spark-extinguishing and silencing apparatus, comprise by having the tail gas connecting tube, suction tude, the dividing plate that the housing of outlet pipe is interior with being located at housing and the catalytic bed of catalyzer constitute, it is characterized in that in the housing inner chamber it being by preceding dividing plate, the air inlet buffer cell I that intermediate membrane and rear portion dividing plate constitute, air inlet noise reduction and catalysis, purifying chamber's II, the back-fire relief noise reduction, catalytic purification chamber III, back-fire relief noise elimination exhaust buffer cell IV is respectively equipped with the baffler that band is furnished with little vent on the dividing plate, the back-fire relief baffler, the catalytic bed of the catalyzer in back-fire relief exhaust silencer and purifying chamber's II and the III.

2, purification according to claim 1, spark-extinguishing and silencing apparatus, the silencing apparatus that it is characterized in that being fixed on the anterior dividing plate is made of waveguide core pipe that is furnished with vent and stiffening plate and outer tube with contraction mouth.

3, purification according to claim 1, spark-extinguishing and silencing apparatus, it is characterized in that being fixed on baffler on the intermediate membrane is that the middle part is big, two little cylindrical shells, is furnished with the filter screen that breeder tube is provided with two-layer 12 purposes in it and constitutes.

4, purification according to claim 1, spark-extinguishing and silencing apparatus, the back-fire relief muffler and the outlet pipe that it is characterized in that being fixed on rear bulkhead and housing rear end cover are one, the surface is furnished with breeder tube and is provided with two layer of 12 purpose filter screen in it.

5, purification according to claim 1, spark-extinguishing and silencing apparatus is characterized in that catalytic bed is to be made of cross form bearing support and the semicircle flat box that the end plate that is furnished with little vent constitutes.

6,, it is characterized in that baffler, the noise reduction flame trap on suction tude and the dividing plate, the axis of back-fire relief muffler are the parallel lines that stagger mutually according to claim 1 or 2,3,4 described purifications, spark-extinguishing and silencing apparatus.