CN114699944B - Steel wool mixer and diesel engine tail gas aftertreatment device with same - Google Patents

Abstract

The invention discloses a steel wool mixer and a diesel engine tail gas aftertreatment device with the same, wherein the steel wool mixer comprises a framework and steel wool, the framework comprises a retainer and a reinforcing plate, the reinforcing plate is arranged in the retainer, and two ends of the reinforcing plate are connected with the inner side surface of the retainer and divide the interior of the retainer into a plurality of spaces; the steel wool is filled in a plurality of spaces formed by the reinforcing plate and the retainer, and the steel wool is fixedly connected with the reinforcing plate and the retainer. According to the invention, the steel wool is filled in a plurality of spaces formed by the reinforcing plate and the retainer and is fixedly connected with the reinforcing plate and the retainer, so that the area of a fixed area can be increased, the fixation is more reliable, and the phenomena of collapse of the center of the steel wool, falling of the steel wool and the like are avoided.

Description

Steel wool mixer and diesel engine exhaust aftertreatment device with it

technical field

The invention belongs to the technical field of diesel engine exhaust aftertreatment, and in particular relates to a steel wool mixer and a diesel engine exhaust aftertreatment device having the same.

Background technique

This section provides background information related to the present disclosure only and is not necessarily prior art.

The steel wool mixer has a good crushing effect on the urea droplets. When the exhaust gas passes through the steel wool with the urea droplets, the urea droplets are decomposed into multiple smaller droplets, which increases the evaporation area of the urea droplets. , thereby reducing the risk of urea crystallization; at the same time, the structure of steel wool is intricate, and the urea and exhaust gas are mixed more evenly.

The steel wool mixer in the prior art is usually filled with a whole piece of steel wool in the mixing tube, and the periphery is brazed with the mixing tube. However, due to the soft material and insufficient strength of steel wool, it can only be used in diesel engine exhaust after-treatment devices with relatively small mixing tube diameters. For medium and heavy post-processing devices, the diameter of the mixing tube is relatively large. Since the material of the steel wool is relatively soft, the area of the brazing area is relatively small, which may easily cause reliability problems, such as the center of the steel wool collapses or the steel wool falls off, etc. Phenomenon.

Contents of the invention

It is an object of the present invention to at least solve the problem of reliability which tends to arise when the diameter of the mixing tube is large. This purpose is achieved through the following technical solutions:

A first aspect of the present invention proposes a steel wool mixer comprising

A frame, the frame includes a cage and a reinforcing plate, the reinforcing plate is arranged inside the cage, the two ends of the reinforcing plate are connected to the inner side of the cage and separate the inside of the cage for multiple spaces; and

steel wool, the steel wool is filled in the plurality of spaces formed by the reinforcing plate and the cage, and the steel wool is fixedly connected to both the reinforcing plate and the cage.

According to the steel wool mixer of the present invention, the steel wool is filled in the multiple spaces formed by the reinforcing plate and the cage, and the steel wool is fixedly connected to the reinforcing plate and the cage, which can increase The fixed area makes the fixing more reliable and avoids the phenomenon of steel wool center collapse or steel wool falling off.

In some embodiments of the present invention, the number of the reinforcement board is one, the number of the steel wool is two, and the two steel wools are respectively filled in the two spaces separated by the reinforcement board, and The outer periphery of each steel wool is fixedly connected with the side surface of the reinforcing plate and the inner surface of the cage.

In some embodiments of the present invention, the number of the reinforcement boards is multiple, and the multiple reinforcement boards are intersected in the cage, and each of the multiple spaces separated by the reinforcement boards The interior is filled with one piece of steel wool, and the outer periphery of each steel wool is fixedly connected with the side surface of the reinforcing plate and the inner side surface of the cage.

In some embodiments of the present invention, the reinforcing plate is provided with a slot, and a plurality of the reinforcing plates are intersected through the cooperation of the slots, and the intersecting lines of the intersecting positions of the plurality of reinforcing plates are located in the cage central location.

In some embodiments of the present invention, the reinforcing plate is in the shape of a sheet, and a plurality of through holes are provided on the surface of the reinforcing plate.

In some embodiments of the present invention, the steel wool is fixedly connected to the reinforcing plate and the cage by welding.

In some embodiments of the present invention, the skeleton is an integrally formed structure.

In some embodiments of the present invention, the ratio of the height of the steel wool to the height of the cage is in the range of 0.9-1.0.

The second aspect of the present invention provides a diesel engine exhaust after-treatment device, comprising a mixing tube and the steel wool mixer as described above, and the steel wool mixer is fixed inside the mixing tube.

In some embodiments of the present invention, the shape and size of the cage of the steel wool mixer match the shape and size of the mixing tube.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to denote the same parts. In the attached picture:

Fig. 1 schematically shows the overall structural representation of the steel wool mixer according to the embodiment of the present invention;

Fig. 2 schematically shows a schematic top view of a skeleton according to an embodiment of the present invention;

Fig. 3 schematically shows a schematic structural view of a reinforcing plate according to an embodiment of the present invention;

Fig. 4 schematically shows a structural representation of a steel wool mixer applied in a diesel engine exhaust aftertreatment device according to an embodiment of the present invention;

The reference signs are as follows:

10 - steel wool mixer;

11 - skeleton;

111 - cage;

112-reinforcing plate;

113 - through hole;

114-grooving;

12 - steel wool;

20 - mixing tube;

21 - fin;

30- cylinder;

40 - cover body.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

It should be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may also be meant to include the plural forms unless the context clearly dictates otherwise. The terms "comprising", "comprising", "containing" and "having" are inclusive and thus indicate the presence of stated features, steps, operations, elements and/or parts but do not exclude the presence or addition of one or Various other features, steps, operations, elements, components, and/or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is specifically indicated. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be referred to as These terms are limited. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For the convenience of description, spatial relative terms may be used herein to describe the relationship of one element or feature as shown in the figures with respect to another element or feature, such as "inner", "outer", "inner". ", "Outside", "Below", "Below", "Above", "Above", etc. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "beneath" the other elements or features. feature above". Thus, the example term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in Figures 1 to 4, according to an embodiment of the present invention, a steel wool mixer 10 is proposed, and the steel wool mixer 10 includes a skeleton 11 and a steel wool 12;

The skeleton 11 includes a cage 111 and a reinforcing plate 112; the reinforcing plate is arranged inside the cage 111, and the two ends of the reinforcing plate 112 are connected to the inner side of the cage 111 and divide the inside of the cage into multiple spaces;

The steel wool 12 is filled in multiple spaces formed by the reinforcing plate 112 and the cage 111 , and is fixedly connected with both the reinforcing plate 112 and the cage 111 .

According to the steel wool mixer 10 of the present invention, the steel wool 12 is filled in the multiple spaces formed by the reinforcing plate 112 and the cage 111, and the steel wool 12 is fixedly connected with the reinforcing plate 112 and the cage 111, compared to In the prior art, since the steel wool 12 is fixedly connected to the cage 111 and at the same time the fixed connection to the reinforcing plate 112 is increased, the fixed area can be significantly increased, making the fixing of the steel wool 12 more reliable and avoiding the appearance of the steel wool center. Collapse or shedding of steel wool.

The quantity of reinforcing plate 112 is one, and the shape is sheet-like, and the quantity of steel wool 12 is two, and two steel wools 12 are respectively filled in the two spaces separated by reinforcing plate 112, and the outer circumference of each steel wool 12 It is fixedly connected with the side surface of the reinforcing plate 112 and the inner side surface of the cage 111 .

The steel wool 12 in the prior art is a whole, and when the mixing tube is a circular tube, the steel wool 12 is in the shape of a circular sheet as a whole. When there is only one reinforcing plate 112 , the steel wool 12 is two semicircular sheets, which are respectively arranged in two spaces formed by the reinforcing plate 112 and the cage 111 . In the present invention, the steel wool 12 is arranged as two semicircular pieces, which can increase the fixing area, thereby increasing the fixing strength. In addition, since the size and weight of each steel wool 12 becomes smaller, its own rigidity is increased, and its reliability is enhanced, so that the advantages of the steel wool mixer with strong anti-crystallization and good uniformity can be better utilized.

There are multiple reinforcing plates 112 , and the multiple reinforcing plates 112 are intersected in the cage 111 , and the outer periphery of each steel wool 12 is fixedly connected to the side of the reinforcing plate 112 and the inner side of the cage 111 .

In Fig. 2, the quantity of reinforcing board 112 is two, and in this embodiment, the quantity of steel wool 12 is four sector pieces, and the angle of every sector piece is 90 degrees, is arranged on reinforcing plate 112 and cage respectively 111 in the four spaces formed. According to needs, also can be set as three reinforcement boards 112, at this moment, the quantity of steel wool 12 is six sector pieces, can make the contact area of steel wool 12 and reinforcement board 112, steel wool 12 and cage 111 more, Thereby achieving a better fixation effect. In addition, since the size and weight of each steel wool 12 becomes smaller, its own rigidity is increased, and its reliability is enhanced, so that the advantages of the steel wool mixer with strong anti-crystallization and good uniformity can be better utilized. Other embodiments will not be described in detail here. Here, for the convenience of processing, the shape and size of each steel wool 12 are the same size. In actual application, if the setting method of the reinforcing plate 112 adopts other setting methods, such as a number of reinforcing plates 112, the cage 111 is divided into two spaces of different sizes. At this time, the shape and size of the two steel wools 12 will be It will be inconsistent, and it is necessary to specially make corresponding steel wool 12 according to the shape and size of each space. By analogy, for a plurality of reinforcing plates 112, the steel wool 12 used in each of the multiple spaces is also made in a special way, which will significantly increase the fixed connection area of the steel wool , so that the fixing effect of steel wool is more stable.

The reinforcing plate 112 is provided with a slot 114 , and a plurality of reinforcing plates 112 are intersected through the cooperation of the slots 114 , and the intersection line of the intersecting position of the plurality of reinforcing plates 112 is located at the center of the cage 111 . Wherein, when the number of reinforcing plates 112 is two, the two reinforcing plates 112 are connected in an assembled cross setting, and the crossing is realized through the cutting groove 114, and the cutting groove 114 is arranged along the central position of the reinforcing plate 112 in the length direction, and the cutting groove 114 The height is half of the height of the reinforcement board 112, and one reinforcement board 112 passes through the cutout 114 of the other reinforcement board 112 to realize cross arrangement. When the number of reinforcing plates 112 is multiple, two slits 114 can be respectively arranged on the upper part and the lower part of the central position in the longitudinal direction of one reinforcing plate 112, and the other two reinforcing plates 112 are processed separately, so that the two reinforcing plates 112 are respectively Pass through the two slots 114 to realize the cross arrangement. This cross splicing can make the installation more efficient.

When the plurality of reinforcing plates 112 are arranged to intersect, the intersection line is located at the center of the holder 111 . When the cross section of the cage 111 is circular, the intersection line passes through the center of the cross section of the cage 111 , which is easy to process and easy to install.

A plurality of through holes 113 are formed on a surface of the reinforcing plate 112 . The through hole 113 is circular, elliptical or rectangular. Of course, the through hole 113 can also be in other shapes, such as a racetrack or other shapes of strips, which is not limited here. By setting through holes of various shapes 113 , so that exhaust gas can flow between two adjacent steel wools 12 , while enhancing reliability, it also ensures anti-crystallization ability and mixing uniformity.

The steel wool 12 is fixedly connected to the reinforcing plate 112 and the cage 111 by welding. The welding method here can be brazing, spot welding or fusion welding, and different welding methods and welding processes can be selected according to the material, which can make the fixing effect more firm.

The frame 11 is integrally formed. At this time, the cut groove 114 can be removed, and compared with the multiple reinforcing plates 112 in the front, the assembled cross arrangement method is adopted, which is easier to produce and more stable. The material of the skeleton 11 can be metal, and it is produced by casting process, which has the characteristics of simple production method and low manufacturing cost.

The ratio range of the height of the steel wool 12 to the height of the cage 111 is 0.9-1.0, for example, 0.95 or 0.98 can be selected. In order to increase the contact area between the steel wool 12 and the cage 111, the height of the steel wool 12 can be approached to the height of the cage 111 as much as possible. When fixing, the steel wool 12 and the cage 111 can be fixed more firmly. Avoid the situation that the steel wool 12 falls off.

The present invention also provides a diesel engine exhaust post-treatment device, which includes a mixing tube 20 and the above-mentioned steel wool mixer 10 , and the steel wool mixer 10 is fixed inside the mixing tube 20 . The fixing method can be carried out by welding. In Fig. 4, in order to observe the structure of the steel wool mixer 10 more easily, the steel wool 12 is not placed in two spaces among the four spaces between the cage 111 and the reinforcing plate 112. At this time, it can be seen that the reinforcement The through holes on the board 112 and the reinforcement board 112 are filled with steel wool 12 in the multiple spaces separated between the cage 111 and the reinforcement board 112 during actual use. In FIG. 4 , steel wool 12 is placed in two opposite spaces, and no steel wool 12 is placed in the other two opposite spaces.

The shape and size of the holder 111 is adapted to the shape and size of the mixing tube 20 . The shape of the cage 111 can be selected according to the shape of the inner surface of the mixing tube 20. When the mixing tube is a round tube, the cage 111 can be a round tube. When the mixing tube is a square tube, the cage 111 can be adjusted to a square shape accordingly. . The outer surface of the cage 111 and the inner surface of the mixing tube 20 are fixed by welding, and can be fixed by methods such as brazing or spot welding.

The diesel engine exhaust aftertreatment device also includes a cylinder 30 and a cover 40, wherein the cover 40 is arranged at one end of the mixing tube 20, the cylinder 30 is connected with the other end of the mixing tube 20, and the outer surface of the mixing tube 20 is provided with fins twenty one.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (9)

1. A steel wool mixer, characterized in that the steel wool mixer comprises:

the framework comprises a retainer and reinforcing plates, wherein the reinforcing plates are arranged in the retainer, and two ends of each reinforcing plate are connected with the inner side surface of the retainer and divide the interior of the retainer into a plurality of spaces; and

the steel wool is filled in the plurality of spaces formed by the reinforcing plate and the retainer, and the steel wool is fixedly connected with the reinforcing plate and the retainer;

the number of the steel wool is larger than one, all the steel wool is respectively arranged in each of the plurality of spaces, and the reinforcing plate is parallel to the height direction of the retainer;

the surface of the reinforcing plate is provided with a plurality of through holes;

the ratio of the height of the steel wool to the height of the retainer ranges from 0.9 to 1.0.

2. A steel wool mixer according to claim 1, characterized in that the number of reinforcing plates is one, the number of steel wool is two, two steel wool are filled in two spaces separated by the reinforcing plates, respectively, and the outer Zhou Jun of each steel wool is fixedly connected with the side of the reinforcing plate and the inner side of the holder.

3. A steel wool mixer according to claim 1, wherein the number of reinforcing plates is plural, a plurality of reinforcing plates are disposed in the holder in a crossing manner, one steel wool is filled in each of a plurality of spaces partitioned by the reinforcing plates, and an outer Zhou Jun of each steel wool is fixedly connected to a side surface of the reinforcing plate and an inner side surface of the holder.

4. A steel wool mixer according to claim 3, wherein the reinforcing plates are provided with slits, a plurality of the reinforcing plates being disposed crosswise by the cooperation of the slits, the crossing line of the crossing positions of the plurality of reinforcing plates being located at the center position of the holder.

5. A steel wool mixer according to claim 1, characterized in that the reinforcing plate is sheet-like.

6. A steel wool mixer according to claim 1, characterized in that the steel wool is fixedly connected to the reinforcing plate and the holder by welding.

7. A steel wool mixer according to claim 1, characterized in that the skeleton is of an integrally formed construction.

8. A diesel exhaust aftertreatment device comprising a mixing tube and a steel wool mixer according to any one of claims 1 to 7, the steel wool mixer being secured inside the mixing tube.

9. The diesel exhaust aftertreatment device of claim 8, wherein the shape and size of the cage of the steel wool mixer is adapted to the shape and size of the mixing tube.

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