CN101294510B

CN101294510B - Metallic carrier suitable for uprated engine post-treatment apparatus

Info

Publication number: CN101294510B
Application number: CN2007103022303A
Authority: CN
Inventors: 夏琦; 张克金
Original assignee: China Faw Group Corp Research And Development Center; WENZHOU YIDA ENVIRONMENT PROTECTION TECHNOLOGY Co Ltd
Current assignee: China Faw Group Corp Research And Development Center; WENZHOU YIDA ENVIRONMENT PROTECTION TECHNOLOGY Co Ltd
Priority date: 2007-12-20
Filing date: 2007-12-20
Publication date: 2012-03-14
Anticipated expiration: 2027-12-20
Also published as: CN101294510A

Abstract

The invention relates to a metal carrier suitable for the aftertreatment device of a high-power engine, which comprises a cylindrical outer casing, and an inner core arranged in the cylindrical outer casing, wherein the inner core is rolled into an S shape by overlapping metal corrugated pieces and metal flat pieces. Metal barrier strips are arranged at both ends of the inner core, the top end of each metal barrier strip is fixed and connected with both ends of the outer casing, core penetrating pins respectively penetrate through two rolled holes of the S-shaped inner core, and both ends of each core penetrating pin are respectively fixed and connected with the corresponding point of the metal barrier strips at both ends. Compared with the prior art, the complex drilling operation is eliminated; the two groups of metal barrier strips at both ends are connected into a whole through the connection and fixation between the metal barrier strips at both ends and the axial core penetrating pins, so that the fixation between the inner core and the outer casing is more stable than the former; because the two groups of metal barrier strips at both ends are mutually overlapped, the two core penetrating pins are axially arranged, the influence area of the air current is very small, the air resistance can be obviously reduced, and the power loss of the engine is decreased.

Description

Be applicable to that the high power engine after-treatment device uses metallic carrier

Technical field

The present invention relates to a kind of high power engine after-treatment device that is applicable to and use metallic carrier, be mainly used in the carrier of loading motor car engine discharging tail gas clean-up material.

Background technique

In order to reach the vehicular emission environmental regulation of increasingly stringent, must install after-treatment device additional to the gas that motor is discharged.Present technology path is that the tail gas three-way catalytic apparatus is installed behind motor.I.e. precious metal and active substances such as coated palladium, platinum, rhodium on pottery or metallic carrier, harmful gas carbon monoxide, hydrocarbon, oxynitrides that motor is discharged are harmless carbon dioxide, water and nitrogen through catalytic purification.Because distinguishing features such as the life-span of metallic carrier are long, power loss is few, ignition is fast, the application in the engine emission after-treatment device more and more widely.In the engine emission after-treatment device, use the pottery or the metallic carrier of much volumes, there is proportionate relationship with the discharge capacity of motor.Engine displacement is big more, and the carrier bulk of use is also big more.The present mass-produced diesel oil load-carrying vehicle of China, engine displacement is many more than 6 liters.In order to reach Europe IV Abgasgesetz, adopt SCR catalyst method basically, owing to reasons such as rotary speed of diesel engine are lower, carrier bulk is generally about three times of engine displacement in the after-treatment device.I.e. 6 liter capacity DENGs require carrier bulk in the after-treatment device about 18 liters.And the metallic carrier of so big volume, diameter is more than 250mm.

For the metallic carrier of big specification, domestic production carrier enterprise does not set foot in as yet.And abroad this series products is divided into two types basically: one type is to adopt nickel solder brazing (referring to Fig. 1), promptly goes up at inner core 2 (alternate overlapping by metal plain film 4 and metal corrugated plate 3) and adds the nickel solder, generally adopts the S type to roll and forms.Again through the vacuum brazing furnace soldering, make in the inner core 2 between the metal plain film 4 and metal corrugated plate 3, and soldering is integral through the solder of nickel fusing between inner core 2 and the shell 1.Because the nickel solder costs an arm and a leg, and adds the expensive of vacuum brazing technique, these metalloid carrier characteristics are that power loss is few, but cost is high.Another kind of is without nickel solder (referring to Fig. 2), and inner core 2 (being that metal plain film 4 is alternate overlapping with metal corrugated plate 3) adopts screw type to roll and forms.Boring on shell 1 and inner core 2 then is again with laterally pinning 7 metal plain film in the inner core 24 and metal corrugated plate 3, inner core 2 and shell 1 riveted.In order to combine firmly to make it in use, inner core is not blown out by the hot waste gas that motor is discharged, and generally is in a plurality of angle punchings, with a plurality of horizontal pin 7 riveteds.Because the metallic carrier diameter of big specification is big, and inner core material very thin (being merely 0.02-0.05mm), (hole is big and the hole can not be bored too greatly; Pin will be thick, therefore more can increase exhaust back pressure, increase the engine power loss); Its technology is tantamount on egg shell, hole, and difficulty is very big.Simultaneously, because pin has influenced the unobstructed of metallic carrier inner duct, strengthened the resistance that air communication is crossed.This metalloid carrier, characteristics are that cost is lower, but the engine power loss is bigger.

In sum, existing high power engine is with metallic carrier or exist cost high; Or exist the preparation process difficulty big, the big deficiency that waits of engine power loss.

Summary of the invention

The object of the invention just provides a kind of high power engine after-treatment device that is applicable to and uses metallic carrier, to solve the big and big problem of engine power loss of cost height, preparation process difficulty that existing technology exists.

Technological scheme of the present invention is: the shell and the inner core that is loaded in it that comprise tubular; This inner core is by metal corrugated plate and the superimposed S type that rolls into of metal plain film; It is characterized in that: one metal blend stop is set respectively at the two ends of described inner core; The top of each this metal blend stop all is fixedly connected with described shell two ends, rolls two of described S type inner core and respectively passes a punching pin in the hole, and the two ends of each this punching pin are fixedly connected with the corresponding part of the metal blend stop at two ends respectively.

The shape of the metal crosspiece word, cross, S-type or swastika type.

Between the various piece of described metal blend stop and the Placement between metal blend stop and shell and the punching pin adopt modes such as welding, riveted or bolt to fix.

Compared with prior art, the present invention has save complicated drilling operating; Metal blend stop through two ends was fixed with axial being connected of punching pin, and two groups of metal blend stops at two ends are connected as a single entity, and made inner core and shell fixing more firm than the former; Because two groups of metal blend stops at two ends overlap, and two punching pins are very little to the area of influence of air-flow for axially being provided with, so can significantly reduce vapour lock, reduced the engine power loss.

Description of drawings

Fig. 1 is the cross-sectional structure schematic representation of existing S type metallic carrier;

Fig. 2 is the perspective view of existing screw type dowel fixes metallic carrier;

Fig. 3 is the end-face structure schematic representation of S type metal blend stop fixing metal carrier of the present invention.

Description of reference numerals:

1, shell, 2, inner core, 3, the metal corrugated plate, 4, the metal plain film, 5, the metal blend stop, 6, the punching pin, 7, horizontal pin.

Embodiment

Shown in Figure 3, the present invention will be mutually superposed corrugated metal sheet 3 and the metal flat plate 4 without applying any solder material, the volume of the inner core is made S-shaped carrier 2 and set into the housing 1, the two metal crosspieces 5 respectively snapping the ends of the inner core 2, the metal crosspiece 5 can be made for the word, cross, S-type or swastika type, the embodiment is illustrated as S-shaped metal crosspiece.In order to reduce the vapour lock of metal blend stop 5, make two groups of metal blend stops 5 projection coincidence as far as possible at two ends, the inboard kissing merging at the two ends of the two ends of each metal blend stop 5 and shell 1 is welded to each other.Left two holes when the punching of two metals pin 6 passes S type carrier and rolls, the two ends of punching pin 6 adopt modes such as welding, riveted or bolt to link together with the corresponding part of two metal blend stops 5 at two ends respectively.

The metallic carrier of making is like this compared with the metallic carrier of soldering, has practiced thrift expensive nickel brazing material, has save the vacuum brazing operation, thereby has reduced cost significantly.

Adopt the metallic carrier (as shown in Figure 2) of boring pin riveted to compare with existing technology; The present invention has save complicated drilling operating; The metal blend stop 5 that upper and lower projection overlaps is added two punchings pins 6 that pass the duct of S type carrier, respectively with shell 1 be welded to each other; Two groups of metal blend stops 5 at two ends are connected as a single entity, make inner core 2 fixing more firm than the former with shell 1.In addition; Because two groups of metal blend stops 5 at two ends overlap; Only be equivalent at most two horizontal pins 7 of the prior art as shown in Figure 2, and two punching pins 6 be axially to be provided with, the area of influence of air-flow is had only pin 6 cross section sum of two punchings; Because the cross section of punching pin 6 is very little, so very little to the influence of air-flow.In sum, the present invention can significantly reduce vapour lock, has reduced the engine power loss.

Claims

1. one kind is applicable to that the high power engine after-treatment device uses metallic carrier; The shell and the inner core that is loaded in it that comprise tubular; This inner core is by metal corrugated plate and the superimposed S type that rolls into of metal plain film; It is characterized in that: at the two ends of described inner core one metal blend stop is set respectively, two groups of described metal blend stop projections overlap, and the top of each this metal blend stop all is fixedly connected with described shell two ends; Roll two of described S type inner core and respectively to pass a punching pin in the hole, the two ends of each this punching pin are fixedly connected with the corresponding part of the metal blend stop at two ends respectively.

(2) as claimed in claim 1, wherein the power engine applies the metal substrate after-treatment device, characterized in that: said metal crosspiece in the shape of word, cross, S-type or swastika pattern.

3. the high power engine after-treatment device that is applicable to according to claim 1 and 2 is used metallic carrier, it is characterized in that: between the various piece of described metal blend stop and the Placement between metal blend stop and shell and the punching pin adopt welding, riveted or bolt mode to be fixedly connected.