CN112196644B

CN112196644B - Arc-shaped sheet turbulent flow type metal honeycomb carrier

Info

Publication number: CN112196644B
Application number: CN202011005495.9A
Authority: CN
Inventors: 高健翔
Original assignee: Tuoxin Taizhou Precision Industry Co ltd
Current assignee: Zhejiang Ouxin Environmental Protection Technology Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-11-05
Anticipated expiration: 2040-09-22
Also published as: CN112196644A

Abstract

The invention discloses an arc-shaped sheet turbulent flow type metal honeycomb carrier, which solves the problem that the existing honeycomb carrier has relatively poor catalytic effect on smoke of an internal combustion engine. The structure comprises a superposed body and a cylindrical shell, wherein the superposed body is plugged into the shell, a plurality of flat sheets and curved foil strips which are staggered and superposed together are wound into a cylinder from the middle position to form the superposed body, a plurality of wave crest portions and wave trough portions which are arranged in parallel are formed on the foil strips, the wave crest portions and the wave trough portions are mutually staggered and connected into a whole, airflow channels are formed on the inner sides of the wave crest portions and the wave trough portions, the wave crest portions and the wave trough portions respectively form one part of the wall body of the corresponding airflow channel, the flat sheets form the other part of the wall body of the airflow channel, a plurality of protruding arc sheets are arranged on the foil strips, the outer edges of the arc sheets are arc-shaped, the arc sheets extend into the cut-off surface of the airflow channel and are contained in the airflow channel, and the included angle between the arc sheets and the length direction of the airflow channel is 0-40 degrees.

Description

Arc-shaped sheet turbulent flow type metal honeycomb carrier

Technical Field

The invention relates to the technical field of metal honeycomb carriers on automobiles and motorcycles, in particular to a metal honeycomb carrier with an arc-shaped sheet type turbulence structure.

Background

With the further implementation of the European five standard of motorcycle exhaust emission, the motorcycle exhaust emission standard is higher and higher, particularly the technical requirements of hydrocarbon emission become stricter, and the catalyst made of the conventional carrier is difficult to meet the emission requirements under the existing standard. The conventional carrier applied to the existing motorcycle exhaust pipe is made by rolling a plurality of layers of superposed flat sheets and wave plate foil strips. The carrier is soaked with the catalyst on the surface of the foil, and the flue gas combusted by the internal combustion engine can contact with the catalyst on the surface of the foil when flowing through the carrier, so that the catalytic purification of the flue gas can be realized, and the exhaust gas can reach the emission standard. A plurality of separated airflow channels are formed in the carrier, when gas flows through the carrier, the gas can directly pass through the airflow channels, the gas in the middle of the airflow channels is difficult to contact with the catalyst on the wall body of the airflow channels, and the contact between the flue gas and the wall body of the airflow channels is insufficient, so that the catalytic effect is relatively poor. In order to adapt to new emission standards, the metal honeycomb foil strips and the carriers need to be improved, so that the catalytic effect is further improved.

Disclosure of Invention

In order to overcome the defects, the technical problems to be solved by the invention are as follows: the utility model provides an arc piece vortex formula metal honeycomb carrier, this metal honeycomb carrier can effectively improve the catalytic effect of flue gas.

In order to solve the technical problem, the technical scheme of the invention is as follows: an arc-shaped sheet turbulent flow type metal honeycomb carrier comprises a stacked body and a cylindrical shell, wherein the stacked body is plugged into the shell, a plurality of flat sheets and curved foil strips which are stacked in a staggered mode are wound into a cylindrical shape from the middle position to form the stacked body, a plurality of wave peak portions and wave trough portions which are arranged in parallel are formed on the foil strips, the wave peak portions and the wave trough portions are arranged in a staggered mode and connected into a whole, the inner sides of the wave crest and the wave trough are both provided with airflow channels, the wave crest and the wave trough respectively form one part of the wall body of the corresponding airflow channel, the flat sheet forms the other part of the wall body of the airflow channel, it is characterized in that a plurality of protruding arc-shaped sheets are arranged on the foil belt, the outer edges of the arc-shaped sheets are arc-shaped, the arc-shaped sheets extend into the interception surface of the airflow channel, and accommodated in the air flow channel, and the included angle between the arc-shaped piece and the length direction of the air flow channel is between 0 and 40 degrees.

The crest and the trough of the wave on the foil strip are respectively arranged on two opposite sides of the middle section of the foil strip, and the middle section is positioned at the position where the crest and the trough of the wave are connected. The foil strip is formed from a thin flat sheet by stamping or folding. When the carrier is prepared, the foil strips need to be overlapped with flat sheets in a staggered mode to form an overlapped body, the overlapped body is wound into a cylindrical shape from the middle position, and then the cylindrical shell is sleeved on the outer side of the overlapped body to be shaped to form the metal honeycomb carrier. Because the wave crest part and the wave trough part are both arched, a plurality of separated air flow channels are formed after the wave crest part and the wave trough part are overlapped with the flat sheet, so that the air flow flows. In the existing carrier, the airflow channels are all straight, after the carrier is applied to a vehicle, smoke generated when an internal combustion engine works can be discharged to the outside through the airflow channels, and when the smoke flows in the airflow channels, the smoke can be catalyzed by a catalyst on the inner wall surfaces of the airflow channels in the carrier. Typically, the arcuate tabs are formed on the foil strip by stamping. Of course, it may also be provided on the surface of the foil strip by means of welding.

Further, the arc-shaped pieces are formed by press-bending the wall body of the foil tape in which an opening is formed at a position corresponding to the arc-shaped pieces, and the inner edge of the opening has an arc-shaped portion. This allows for a fast speed of the foil strip and facilitates the formation of the protruding arc-shaped pieces on the foil strip.

Further, all be equipped with on crest portion of wave and the trough portion of wave the arc piece, this has further improved the vortex effect of foil belt to the flue gas, can effectively improve the catalytic purification effect to the flue gas.

Furthermore, the foil belt is provided with a plurality of rows of arc-shaped sheets, the arc-shaped sheets in one row are arranged along the length direction perpendicular to the airflow channel, and an included angle is formed between two arc-shaped sheets in the same airflow channel in at least two rows of arc-shaped sheets. The arc-shaped pieces are arranged in rows, and the arc-shaped pieces are convenient to process on the foil strips. The included angle has between two arc pieces, and when the flue gas flowed in airflow channel, two arc pieces can produce opposite direction's disturbance to the flue gas on horizontal, can produce the torrent in airflow channel, can make the flue gas at airflow channel horizontal mixed flow for flue gas velocity in horizontal in airflow channel tends to unanimity, makes everywhere flue gas homoenergetic enough with the catalyst contact abundant, has guaranteed the catalytic effect to the flue gas.

Furthermore, the arc-shaped sheet is formed by punching by a punching machine, the punching machine is provided with a plurality of punching heads, and the peripheral surface of each punching head is composed of an inclined surface and a convex arc surface.

When the at least two rows of arc-shaped sheets are processed, after the arc-shaped sheets are punched and processed on the foil belt, all punching heads are deflected to the same direction for a certain angle, and then the arc-shaped sheets in the other row are processed.

The inclined plane is a plane, and the inclined plane is obliquely arranged relative to the length direction of the airflow channel, namely an included angle is formed between the inclined plane and the length direction of the airflow channel. The change of the angle between the two rows of arc-shaped sheets is realized through the deflection of the angle of the opposite punching head, and the operation is very convenient and fast.

Furthermore, the ratio of the width of the opening to the width of the crest or trough is 1: 3-1: 2, and the opening is located at the middle position of the crest or trough in the width direction. The formed arc-shaped sheet has good turbulence effect on the smoke and can be well adapted to the microcosmic flowing state of the smoke in the airflow channel. And, there is the open-ended setting, also makes to form interdynamic between the flue gas in two adjacent airflow channel to also be convenient for form the torrent in the honeycomb carrier, improve the contact degree of flue gas and catalyst, increase the catalytic purification effect of flue gas.

Further, the arcuate tabs extend into the airflow passage at 1/4-1/2 of the height of the peaks or valleys in which they are located.

Further, the arcuate tabs extend into the airflow passage at 1/3 with a crest or trough height. The arc piece of this kind of size can guarantee the vortex effect to the flue gas, moreover, when contacting with high temperature flue gas, also is difficult for yielding, and stability in use is good.

Further, the cross section of the crest part and the trough part is in any one or combination of a triangle, an arc, a sine wave, a trapezoid or a rectangle.

Therefore, the invention has the following beneficial effects: the arc-shaped pieces are arranged on the wave peak portions and/or the wave valley portions of the foil strips, and extend into the cut-off surface of the airflow channel, so that the flow situation of the smoke in the airflow channel can be well adapted, the turbulent flow effect on the airflow is achieved, the airflow in the airflow channel has turbulent mixed flow in the transverse direction, the contact degree between the smoke and the inner wall surface of the airflow channel is improved, and the catalytic purification effect on the smoke is guaranteed. Under the condition that the influence on the flowing speed of the flue gas in the airflow channel is small, the catalytic purification effect of the flue gas can be improved, so that the flue gas purification device can well adapt to the policy requirements of waste gas emission. The outer edge of the arc-shaped sheet is arc-shaped, and the arc-shaped sheet is not easy to deform after contacting with high-temperature flue gas in the airflow channel. The arc-shaped sheet is suspended on the inner wall surface of the airflow channel in an isolated manner, and can generate a certain vibration effect after being impacted by smoke, so that carbon deposit on the inner wall of the airflow channel can be made to be vibrated down, and the catalytic purification effect of the catalyst on the smoke can be ensured. Through being formed with the opening on the foil strip, combine the vortex effect of arc piece, and make the flue gas in the adjacent airflow channel can produce certain horizontal influence each other to make flue gas distribution and velocity of flow in the metal carrier relatively more even, on the basis of guaranteeing catalytic purification effect, can effectively reduce the produced noise of impact of flue gas, the metal honeycomb carrier who makes can effectively fall and make an uproar.

Drawings

Fig. 1 is a perspective view of the present arc-shaped turbulence type metal honeycomb carrier.

Fig. 2 is a block diagram of a foil strip and a flat sheet stacked together.

Fig. 3 is a view of an end structure of the foil strip.

Fig. 4 is a block diagram of a single piece of foil tape.

Fig. 5 is a partially enlarged view of the foil strip.

In the figure, 1, a housing; 2. flattening; 3. a foil tape; 31. a wave trough portion; 32. a crest portion; 33. an opening; 34. an arc-shaped sheet; 4. an air flow channel.

Detailed Description

The arc-shaped sheet turbulent flow type metal honeycomb carrier needs to be soaked with a catalyst, and is arranged in an exhaust pipe of an internal combustion engine in practical application, so that the catalytic purification can be performed on smoke generated by the operation of the internal combustion engine.

In the figure, the foil strip 3 is a metal sheet folded on itself into a curved plate shape. So that a plurality of wave crest portions 32 and wave trough portions 31 arranged side by side are formed thereon, the wave crest portions 32 and the wave trough portions 31 are arranged alternately with each other and integrally connected, and the cross section of the formed foil tape 3 is sinusoidal. In the preparation of the metal honeycomb carrier, as shown in fig. 2, a foil strip 3 and a flat plate-like flat sheet 2 are stacked in a staggered manner to form a stacked body, and the flat sheet 2 and the foil strip 3 are made of the same material. The stacked body is wound into a cylindrical shape from the middle position by a winder, and the cylindrical body is inserted into a cylindrical housing 1 to produce the honeycomb carrier shown in fig. 1. A plurality of airflow channels 4 are formed in the honeycomb carrier along the axial direction thereof for allowing the flue gas to flow through the honeycomb carrier. After the honeycomb carrier is immersed in the catalyst solution, a layer of catalyst is soaked on the surfaces of the foil 3 and the flat sheet 2, namely on the inner wall surface of the airflow channel 4. After the honeycomb carrier is arranged in an exhaust pipe of an internal combustion engine, smoke can contact with a catalyst when flowing in the airflow channel 4, and the smoke can be catalyzed and purified so as to reduce the harm of discharged waste gas to the environment.

Since the crest portions 32 and the trough portions 31 are both arched, the number and the positions of the airflow channels 4 correspond to those of the crest portions 32 and the trough portions 31, that is, one airflow channel 4 is formed on the inner side of one crest portion 32 or one trough portion 31, the crest portions 32 and the trough portions 31 respectively form one part of the wall body of the airflow channel 4, and the flat piece 2 forms the other part of the wall body of the airflow channel 4.

A plurality of protruding arc-shaped pieces 34 are arranged on the foil strip 3 at the positions of the wave crest portions 32 and/or the wave trough portions 31, the outer edges of the arc-shaped pieces 34 are arc-shaped, and the arc-shaped pieces 34 are shown to be approximately half-moon-shaped. The arcuate tab 34 extends into the cut-off surface of the air flow passage 4 and provides a barrier to disturbance of the air flow in the air flow passage 4. The arcuate tab 34 is of a size smaller than the transverse dimension of the airflow passage 4, the arcuate tab 34 being fully received within the airflow passage 4. The arc-shaped pieces 34 are generally disposed along the length direction of the air flow passage 4, and may form an angle with the length direction of the air flow passage 4. To avoid excessive intrusion into the gas flow, the angle between the arcuate tab 34 and the length of the gas flow passage 4 is between 0 and 40 degrees, preferably a few degrees, and is 0 degrees when the arcuate tab 34 is parallel to the length of the gas flow passage 4.

The outer edge of the arc-shaped piece 34 is in a convex arc shape, the air flow flows in the longitudinal direction of the air flow channel 4, in the transverse direction of the air flow channel 4, the arc-shaped piece 34 extends into the air flow channel 4 to 1/4-1/2 of the height of the wave crest part 32 or the wave trough part 31, preferably, the arc-shaped piece 34 extends into the air flow channel 4 to 1/3 of the height of the wave crest part 32 or the wave trough part 31, and the arc-shaped piece 34 does not need to extend into the center of the air flow channel 4.

The arc-shaped pieces 34 may be welded and fixed to the foil 3, but in general, the arc-shaped pieces 34 are formed by punching and bending the wall body of the foil 3, and the wall thickness of the arc-shaped pieces 34 is equal to that of the foil 3. At the foil strip 3, at positions corresponding to the arc-shaped pieces 34, openings 33 are formed at the wave crests 32 and/or the wave troughs 31 of the foil strip 3, since a stamping of the foil strip 3 is used. It is shown that the wave crests 32 and the wave troughs 31 are provided with said arcuate strips 34, the arcuate strips 34 being arranged in a plurality of rows side by side on the foil strip 3, the arcuate strips 34 in a row being arranged perpendicular to the length of the air flow channels. Stamping the foil strip 3 by a multi-head stamping machine, wherein one stamping head on the stamping machine corresponds to one wave crest part 32, placing the foil strip 3 on a placing table, a strip-shaped supporting edge is arranged on the placing table corresponding to the wave crest part 32, and the wave crest part 32 is buckled on the supporting edge so as to support the foil strip 3. A notch is provided at a position corresponding to the punch on the support ridge, and when the punching operation is performed, the punch punches the foil strip 3 to form an opening 33, and the punch is inserted into the notch through the opening 33, and at the same time, the punch bends the punched portion of the ridge portion 32 to form an arc piece 34. After the arc pieces 34 are formed on the peak portions 32, the foil 3 is turned over and placed on a shelf, and the arc pieces 34 are formed on the valley portions 31 by a punching head. The width ratio of the opening 33 formed in the machining process to the width of the peak part 32 or the wave trough part 31 is between 1: 3 and 1: 2, and the opening 33 is positioned at the middle position of the peak part 32 or the wave trough part 31 in the width direction. In the machining of the arc-shaped piece 34, the number of the punching heads generally corresponds to the number of the ridge portions 32 or the valley portions 31 on the foil strip 3. One working stroke of such a multi-head punching head forms a row of arc-shaped pieces 34 on the foil strip 3, and as the foil strip 3 moves, a plurality of rows of arc-shaped pieces 34 are formed on the foil strip 3.

The arc-shaped pieces 34 are disposed in the air flow path 4 in a direction not generally parallel to the longitudinal direction of the air flow path 4, but obliquely disposed in the air flow path 4. This can be achieved by providing the inner side of the stamping head as an inclined surface, which, after stamping the foil strip 3, causes the arcuate tabs 34 to be inclined in the air flow channel 4. Since the outer edge of the arc piece 34 is arc-shaped, the outer side surface of the punch itself is provided as a convex arc surface, and the outer peripheral surface of the punch is constituted by the convex arc surface and an inclined surface which causes the arc piece 34 to be obliquely arranged in the air flow passage. After the foil strip 3 has been punched by the punching head, the opening 33 is formed with an arc-shaped portion at its inner edge. Of the plurality of rows of arc-shaped fins 34, at least two rows of arc-shaped fins 34 have an included angle between two arc-shaped fins 34 in the same airflow passage 4, and the included angle is generally several degrees. After a row of arc-shaped pieces 34 is processed on the foil 3, the stamping head can be deflected by a certain angle, so that a certain included angle is formed between the two arc-shaped pieces 34 in the same air flow channel 4. The punching head can be fixed through a pair of jam nuts, and when the angle of the punching head is adjusted, the jam nuts can be loosened to adjust the punching head to the required angle and then the punching head is tightened.

The cross section of the crest portion 32 and the trough portion 31 is in any one or combination of a triangle, an arc, a sine wave, a trapezoid or a rectangle.

Claims

1. An arc-shaped sheet turbulent flow type metal honeycomb carrier comprises a stacked body and a cylindrical shell, wherein the stacked body is plugged into the shell, a plurality of flat sheets and curved foil strips which are stacked in a staggered mode are wound into a cylindrical shape from the middle position to form the stacked body, a plurality of wave peak portions and wave trough portions which are arranged in parallel are formed on the foil strips, the wave peak portions and the wave trough portions are arranged in a staggered mode and connected into a whole, the inner sides of the wave crest and the wave trough are both provided with airflow channels, the wave crest and the wave trough respectively form one part of the wall body of the corresponding airflow channel, the flat sheet forms the other part of the wall body of the airflow channel, it is characterized in that a plurality of protruding arc-shaped sheets are arranged on the foil belt, the outer edges of the arc-shaped sheets are arc-shaped, the arc-shaped sheets extend into the interception surface of the airflow channel, the arc-shaped sheet is accommodated in the airflow channel, and the included angle between the arc-shaped sheet and the length direction of the airflow channel is between 0 and 40 degrees;

the foil belt is provided with a plurality of rows of arc-shaped sheets, the arc-shaped sheets in one row are arranged along the length direction vertical to the airflow channel, and an included angle is formed between two arc-shaped sheets in the same airflow channel in at least two rows of arc-shaped sheets;

the arc-shaped sheet is formed by punching by a punching machine, the punching machine is provided with a plurality of punching heads, and the peripheral surface of each punching head consists of an inclined plane and a convex arc surface;

2. The arc-shaped sheet turbulent flow type metal honeycomb carrier according to claim 1, wherein the arc-shaped sheet is formed by press-bending a wall body of a foil strip on which an opening is formed at a position corresponding to the arc-shaped sheet, and an inner edge of the opening has an arc-shaped portion.

3. The arc-shaped sheet spoiler metal honeycomb carrier according to claim 2, wherein said arc-shaped sheets are provided on both of crest portions and trough portions.

4. The arc-shaped sheet spoiler type metal honeycomb carrier according to claim 2, wherein the ratio of the width of the opening to the width of the crest portion or the trough portion thereof is between 1: 3 and 1: 2, and the opening is located at the middle position in the width direction of the crest portion or the trough portion thereof.

5. The arcuate spoiler metal honeycomb carrier according to claim 1 wherein the arcuate flaps extend into the gas flow channel at 1/4-1/2 of the height of the peaks or valleys therein.

6. The arcuate blade turbulent flow metallic honeycomb carrier of claim 5 wherein said arcuate blade extends into the airflow passage at 1/3 having a crest or trough height.

7. The arc-shaped sheet spoiler metal honeycomb carrier according to claim 1, wherein the cross section of the wave crest portions and the wave trough portions is in a shape of any one or a combination of triangle, circular arc, sine wave, trapezoid or rectangle.