KR102517426B1 - Mixing device in vehicle exhaust system - Google Patents

Abstract

The present invention relates to a mixing device for a vehicle exhaust system. The present invention includes a grill part in which a plurality of ring members are arranged overlapping in a concentric circle, and a plurality of slits are formed between each ring member; a partition wall that connects the plurality of ring members of the grill part in a right angle direction to connect the plurality of ring members; and a wing part that is bent at an end of the partition wall and is inclined to the front of the grill part. The wing part is formed at one end of the partition wall, and a plurality of cut blades are bent in opposite directions, and each of the plurality of cut blades is formed to disperse the flow of air in different directions. The present invention can be installed in an exhaust gas discharge direction to uniformly distribute urea water.

Description

Mixing device in vehicle exhaust system {Mixing device in vehicle exhaust system}

The present invention relates to a mixing device of a vehicle exhaust system for promoting vaporization (evaporation) of a reducing agent by mixing a reducing agent and exhaust gas inside an exhaust pipe.

In general, as interest in the global environment grows, harmful substances emitted by automobiles are cited as the biggest culprit in deteriorating air quality in urban areas.

In particular, efforts to develop an exhaust gas aftertreatment system to reduce nitrogen oxides (NOx) and particulate matter PM (PM), which emit relatively large amounts of emissions from vehicles, are continuing domestically and abroad.

As a result, in relation to particulate matter emissions, the EU5 legislation forcing the installation of a diesel particulate filter (DPF), which makes it close to zero, was implemented simultaneously in Europe and Korea from September 2009. Therefore, the system to be researched and developed intensively in order to reduce the exhaust gas of vehicles in the future is the nitrogen oxide reduction (DeNOx) system.

Among them, the system that shows the highest nitrogen oxide reduction efficiency is the Selective Catalytic Reduction (SCR) system using urea.

In this way, when the SCR system using urea is installed, nitrogen oxide reduction can be maximized through mixing of urea and exhaust gas.

Inside the exhaust pipe located in front of the SCR catalyst and downstream of the dosing unit, a mixer is provided to promote vaporization (evaporation) of the reducing agent by mixing the reducing agent with the exhaust gas.

The mixer is installed on the flow path of the reducing agent injected from the dosing unit, and the main function is to distribute the uniform flow of the reducing agent. It is necessary to improve the function of the mixer to further improve the flow uniformity of the reducing agent. came to the fore

Korean Patent Application No. 10-2017-0104727

The present invention has been made to solve the problems of the prior art, and is mounted in the exhaust gas discharge direction to uniformly distribute the number of urea and to improve the uniformity. Its purpose is to provide a mixing device for a vehicle exhaust system there is

The object of the present invention described above, a plurality of ring members are disposed overlapping in the form of concentric circles, a grill portion formed by forming a plurality of slits between each ring member; a barrier rib connecting a plurality of ring members of the grill unit in a perpendicular direction to connect the plurality of ring members; A wing part bent at the end of the partition wall and inclined at the front surface of the grill part, wherein the wing part is formed at one end of the partition wall, and the plurality of incised blades are bent oppositely, and the plurality of incised blades Each is achieved by a mixing device in the vehicle exhaust system configured to distribute the flow of air in different directions.

The bulkhead is formed with a plurality of fitting grooves into which a plurality of ring members are fitted, and the plurality of cut blades are composed of a first inclined plate bent in a clockwise direction and a second inclined plate bent in a counterclockwise direction. to be

The first inclined plate or the second inclined plate is characterized in that formed to have an angle between the partition wall and ± 120 ~ 130 °.

Each of the ring members is fitted with the fitting groove of the bulkhead, and a cutout groove is formed to insert the bulkhead, and the fitting groove of the bulkhead and the cutout groove of the ring member are formed to have the same length.

According to the present invention, it is installed in the exhaust gas discharge direction to discharge exhaust gas, but by uniformly distributing the number of urea, it can contribute to the reduction of pollutants, and there is an effect in which the life of the catalyst can be expected to be extended.

1 is a perspective view showing a mixing device for a vehicle exhaust system according to the present invention;
2 is an exploded perspective view showing a mixing device of a vehicle exhaust system according to the present invention;
3 is a front view showing a mixing device of a vehicle exhaust system according to the present invention;
4 is a cross-sectional view showing a mixing device of a vehicle exhaust system according to the present invention;
5 is a view showing a mounting example of a mixing device of a vehicle exhaust system according to the present invention;
6 is a partial cross-sectional view showing a discharge means 1000 formed on a ring member 230 applied to a mixing device of a vehicle exhaust system according to another embodiment of the present invention;
7 is an enlarged cross-sectional view of FIG. 6;

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes can be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes to the embodiments are included within the scope of rights.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only, and may be modified and implemented in various forms. Therefore, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Although terms such as first or second may be used to describe various components, such terms should only be construed for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.

It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle.

Terms used in the examples are used only for descriptive purposes and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In addition, in the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims.

In the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are the same as those commonly understood by one of ordinary skill in the art to which the present invention belongs. It has meaning. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the embodiments of the present invention, an ideal or excessively formal meaning not be interpreted as

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative, so the present invention is not limited to the details shown. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. When 'includes', 'has', 'consists of', etc. mentioned in this specification is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

When an element or layer is referred to as “on” another element or layer, it includes all cases where another element or layer is directly on top of another element or another layer or other element intervenes therebetween. Like reference numbers designate like elements throughout the specification.

The size and thickness of each component shown in the drawings are shown for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated components.

Each feature of the various embodiments of the present invention can be partially or entirely combined or combined with each other, and as those skilled in the art can fully understand, various interlocking and driving operations are possible, and each embodiment can be implemented independently of each other. It may be possible to implement together in an association relationship.

Among the accompanying drawings, FIG. 1 is a perspective view showing a mixing device for a vehicle exhaust system according to the present invention, FIG. 2 is an exploded perspective view showing a mixing device for a vehicle exhaust system according to the present invention, and FIG. 3 is a vehicle exhaust system according to the present invention. 4 is a cross-sectional view showing a mixing device of a vehicle exhaust system according to the present invention, FIG. 5 is a view showing an example of mounting the mixing device of a vehicle exhaust system according to the present invention, and FIG. 6 is a view showing a mixing device of the present invention. A partial cross-sectional view showing the discharge means 1000 formed on the ring member 230 applied to the mixing device of the vehicle exhaust system according to another embodiment of FIG. 7 is an enlarged cross-sectional view of FIG. 6 .

The mixing device (A) of the vehicle exhaust system according to the present invention,

A grill unit 2 formed by overlapping a plurality of ring members 230 in the form of concentric circles and forming a plurality of slits 24 between each ring member 230;

A plurality of ring members 230 of the grill unit 2 are coupled in a right angle direction to a partition wall 4 connecting the plurality of ring members 230;

A wing portion 6 bent at the end of the partition wall 4 and formed obliquely on the front surface of the grill portion 2;

In the grill unit 2, a plurality of ring members 230 having diameters ranging from small to large are concentrically disposed overlapping each other so that slits 24 are formed between the ring members 230.

The ring members 230 are formed by bending a plate in a circular shape, and are overlapped at equal intervals from the innermost small-diameter ring member 230 to the outermost large-diameter ring member 230.

The bulkhead 4 is a plate material connecting the plurality of ring members 230 of the grill unit 2 at right angles to each other, and is radially arranged.

The bulkhead 4 is formed with a plurality of fitting grooves 40 into which a plurality of ring members 230 are fitted.

The wing portion 6 is formed at one end of the partition wall 4 so that the plurality of incised blades 60 are bent oppositely, and each of the plurality of incised blades 60 distributes the air flow in different directions. is formed

According to one example, the plurality of cut blades 60 include a first inclined plate 60a bent in a clockwise direction and a second inclined plate 60b bent in a counterclockwise direction.

The first inclined plate 60a or the second inclined plate 60b is formed to have an angle between the barrier rib 4 and ±120 to 130°.

That is, when the partition wall 4 is placed horizontally, the first inclined plate 60a is formed to have a sandwiching angle of +120 to 130 °, and the second inclined plate 60b is formed to have a sandwiched angle of -120 to 130 °.

Therefore, the fluid passing through each slit 24 of the grill unit 2 passes through the partition wall 4 and flows inside along the first inclined plate 60a, which is inclined up and down, and the first inclined plate 60a. , and the fluid flowing outside along the second inclined plate 60b is guided upward.

By this flow, a portion of the fluid (urea water (U)) is induced to flow upward and the rest is induced to flow downward in one wing, so that the dispersion range of the urea water (U) can be widened and uniformly distributed. There is (see FIG. 5).

On the other hand, each ring member 230 is fitted with the fitting groove 40 of the partition wall 4, and a cutout groove 220 is formed so that the partition wall 4 is inserted.

Therefore, the fitting groove 40 of the partition wall 4 and the cutting groove 220 of the ring member 230 are formed to have the same length, so that when the partition wall 4 is fitted to the ring member 230, the outer surface of the ring member 230 and the end of the partition wall 4 may be in a state substantially coincident with each other.

Meanwhile, referring to FIGS. 6 and 7 , according to another embodiment of the present invention, a discharge means 1000 formed on the outermost ring member 230 to discharge foreign substances; includes.

The discharge unit 1000 is formed on the outermost ring member 230 and has a horizontal passage formed therein, and a discharge unit coupling portion 11 having a thread formed in the passage, and a discharge unit coupling portion 11. A discharge unit (2) that is detachably coupled and selectively opens and closes the discharge unit coupling part (11);

The discharge unit 2 has a tubular outer jacket screwed to the inner surface of the discharge unit coupling part 11, and is screwed to the inner surface of the outer jacket to be movable along the axial direction of the outer jacket, and has an iron collecting magnet inside ( 3) is accommodated so that a part of the iron powder collecting magnet 3 protrudes to the outside; an inner jacket accommodated inside the inner jacket to elastically press and support the iron powder collecting magnet 3; and an inner jacket. A slide clamp disposed inside the jacket to be slidably movable along the axial direction and supporting the outer surface of the iron powder collecting magnet 3 to align the central axis of the iron powder collecting magnet 3 with the central axis of the inner jacket may be included. .

At this time, the iron powder collecting magnet 3 is formed in a rod shape having a predetermined length, and an outer surface of the iron powder collecting magnet 3 may be formed with a locking jaw supported by a slide clamp in an axial direction.

The discharge unit 2 may include a first plug 21, a hopper 22, a strainer 23, a second plug 25, a third plug 26, and a pump unit 27.

The first plug 21 is fastened to the inner surface of the discharge unit coupling part 11 and may be formed in a tubular shape communicating with the crankcase 1 in which dust particles are accommodated so that the dust particles flow therein.

The hopper 22 is formed in a wedge shape in which an inner diameter gradually decreases along a direction in which dust particles are introduced.

The hopper 22 is coupled to the center of the front end of the first plug 21, is disposed inside the crankcase 1, and is configured to introduce dust particles accommodated in the crankcase 1 into the first plug 21. It can be.

For example, a screw thread may be formed at the rear end of the hopper 22 to be screwed into the front end of the first plug 21 .

The strainer 23 may be coupled to the inside of the hopper 22 and may be configured to stabilize dust particles flowing into the hopper 22 .

For example, the strainer 23 divides and guides a ring part coupled to and supported inside the hopper 22, and a plurality of dust particles disposed inside the ring part and flowing into the hopper 22 to guide the flow of dust particles A lattice-shaped stabilization filter for stabilization may be included.

The second plug 25 is fastened to the outer surface of the discharge unit coupling part 11 to support the first plug 21 at the rear of the first plug 21, and the first plug 21 and the third plug 26 ) can be configured to communicate with.

The third plug 26 is fastened to the outer surface of the second plug 25 to support the second plug 25 at the rear of the second plug 25, and may be configured to communicate with the second plug 25. .

The pump unit 27 may be accommodated inside the third plug 26 and generate rotational force to flow foreign substances in one direction.

The iron powder collecting magnet 3 may include a plurality of first iron powder collecting magnets 31 and a plurality of second iron powder collecting magnets 32 .

The plurality of first iron collecting magnets 31 are formed in a cylindrical shape, accommodated in the first plug 21, and can collect branch particles (metallic foreign matter) (S) flowing inside the first plug 21. there is.

The plurality of second iron collecting magnets 32 are formed in a cylindrical shape to be accommodated in the second plug 25 and to collect metallic foreign substances S flowing inside the second plug 25, that is, dust particles. there is.

Meanwhile, referring to FIG. 5, the mixing device A of the vehicle exhaust system according to the present invention,

A mixing device (A) inside the injector assembly 33 formed at an angle at one end of the conduit connected to the diesel oxidation catalyst (DOC) 31 and the diesel particulate filter (DPF) 32 having the inlet 30 formed at one end. is inserted

A selective catalytic reduction unit (SCR) 34 and an AOC 35 are connected to the conduit connected to the rear end of the mixing device A, and a lead-out unit 36 is formed.

A urea water injector 37 is connected to one side of the injector assembly 33, and urea water is injected toward the mixing device A.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and may be variously modified and implemented without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

2: grill part 4: bulkhead
6: wing part 22: ring member
24: slit 40: fitting groove
60: blade 60a: first inclined plate
60b: second inclined plate 220: cutting groove

Claims (3)

A grill unit formed by overlapping a plurality of ring members in the form of concentric circles and forming a plurality of slits between each ring member;
a barrier rib connecting a plurality of ring members of the grill unit in a perpendicular direction to connect the plurality of ring members;
A wing portion bent at an end portion of the partition wall and formed obliquely on the front surface of the grill portion;
the wing part
Formed at one end of the partition wall, a plurality of incised blades are bent oppositely,
Each of the plurality of incised blades is formed to disperse the air flow in different directions,
the bulkhead
A plurality of fitting grooves into which a plurality of ring members are fitted are formed,
The plurality of incised blades,
It consists of a first inclined plate bent in a clockwise direction and a second inclined plate bent in a counterclockwise direction,
The first inclined plate or the second inclined plate is formed to have an angle between ± 120 and 130 ° with the partition wall,
Each of the ring members is fitted with the fitting groove of the partition wall, and a cutout groove is formed so that the partition wall is inserted,
The fitting groove of the partition wall and the cut groove of the ring member are formed to have the same length,
A mixing device for a vehicle exhaust system comprising: a discharge means formed on the outermost ring member to discharge foreign substances.
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