CN220328992U - Nozzle and aftertreatment system - Google Patents

Abstract

The utility model provides a nozzle and a post-treatment system, wherein the nozzle comprises a nozzle structure, the nozzle structure is provided with an inflow hole and an ejection hole, the nozzle structure comprises a first cyclone sheet, a first nozzle plate and a second cyclone sheet which are sequentially arranged along a preset direction, a first cyclone channel is arranged on the first cyclone sheet, a second cyclone channel is arranged on the second cyclone sheet, and a communication channel is arranged on the first nozzle plate; the first cyclone channel comprises a plurality of first channels and first through holes communicated with the inflow holes, and the first through holes and the first channels are all arranged along a preset direction and penetrate through the first cyclone sheet; the second swirl passage comprises a plurality of second passages and second through holes communicated with the ejection holes, and the second through holes and the second passages are all arranged along a preset direction and penetrate through the second swirl plates; the plurality of second passages are in communication with the plurality of first passages through the communication passage. The utility model solves the problems of poor atomizing effect and larger sprayed spray granularity of the nozzle in the prior art.

Description

Nozzle and aftertreatment system

Technical Field

The utility model relates to the technical field of nozzle equipment, in particular to a nozzle and a post-treatment system.

Background

The size of the spray particle size of the urea aqueous solution of an SCR (english full name Selective Catalytic Reduction, chinese name selective catalytic reduction) aftertreatment system of a diesel engine or an engine has a great influence on crystallization, uniformity and the like.

At present, the swirl nozzle mainly conducts flow guide through a spray hole plate below the ball valve, and specifically, the swirl nozzle comprises an upper spray hole plate, a middle spray hole plate, a lower swirl chamber spray hole plate and an outlet spray hole plate. The swirling flow effect mainly occurs in the orifice plate of the lower swirling flow chamber, and swirling flow is formed through a certain flow passage design, so that urea liquid bundles are atomized under the action of shearing force.

However, the swirl nozzle has poor atomization effect, the sprayed spray has larger granularity, urea solution is sprayed into the aftertreatment system, a liquid film is easily formed on the nozzle head and the wall of the mixer, urea crystallization is caused, an exhaust pipeline is blocked, emission is out of standard, and even a diesel engine or an engine can be damaged under serious conditions.

Disclosure of Invention

The utility model mainly aims to provide a nozzle and a post-treatment system, which are used for solving the problems of poor atomizing effect and larger sprayed spray granularity of the nozzle in the prior art.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a nozzle including a nozzle structure having an inflow hole and an outflow hole, the nozzle structure including a first swirl plate, a first orifice plate, and a second swirl plate sequentially arranged in a predetermined direction, the first swirl plate being provided with a first swirl passage, the second swirl plate being provided with a second swirl passage, the first orifice plate being provided with a communication passage; the first cyclone channel comprises a plurality of first channels and first through holes communicated with the inflow holes, and the first through holes and the first channels are all arranged along a preset direction and penetrate through the first cyclone sheet; the first channels are arranged at intervals along the circumferential direction of the first through holes, are communicated with the first through holes and extend from the first through holes towards the edge of the first cyclone sheet; the second swirl passage comprises a plurality of second passages and second through holes communicated with the ejection holes, and the second through holes and the second passages are all arranged along a preset direction and penetrate through the second swirl plates; the second channels are arranged at intervals along the circumferential direction of the second through holes, are communicated with the second through holes and extend from the second through holes towards the edge of the second cyclone sheet; the plurality of second passages are in communication with the plurality of first passages through the communication passage.

Further, each first channel is provided with a first communication end and a first closed end which are sequentially arranged along the extending direction, the first communication end is communicated with the first communication hole, and the first closed end extends towards the edge of the first cyclone sheet; the width of the first channel perpendicular to the extending direction of the first channel is gradually reduced in the direction from the first communication end to the first closed end; and/or each second channel is provided with a second communication end and a second closed end which are sequentially arranged along the extending direction, the second communication ends are communicated with the second through holes, and the second closed ends extend towards the edge of the second cyclone sheet; the width of the second channel perpendicular to the extending direction of the second channel is gradually reduced in the direction from the second closed end to the second communication end.

Further, each first channel is an arc-shaped channel along the extending direction; and/or each second channel is an arc-shaped channel along the extending direction of the second channel.

Further, each first channel is an arc-shaped channel along the extending direction; each second channel is an arc-shaped channel along the extending direction; the rotation directions of the first channels are the same, the rotation directions of the second channels are the same, and the rotation directions of the first channels are opposite to the rotation directions of the second channels.

Further, the projection of the first communication end of each first channel, which is communicated with the first through hole, on the projection surface is a first projection; the projection of the second communication end of each second channel, which is communicated with the second through hole, on the projection surface is a second projection; the projection of the first through hole on the projection surface is a third projection; the plurality of first projections and the plurality of second projections are alternately arranged in turn in the circumferential direction of the third projection; the projection surface is perpendicular to the preset direction.

Further, the first projection and the second projection that are adjacently disposed are disposed at intervals in the circumferential direction of the third projection.

Further, the communication channel comprises a plurality of third channels, the first channels, the second channels and the third channels are arranged in pairs, and the first channels, the second channels and the third channels which are arranged in pairs are communicated; the first channel comprises a first channel section and a second channel section communicated with the first channel section, and the first channel section and the second channel section are sequentially arranged in the direction from the first through hole to the edge of the first cyclone sheet; the second channel comprises a third channel section and a fourth channel section communicated with the third channel section, and the third channel section and the fourth channel Duan Youdi through holes are sequentially arranged in the direction from the edge of the second cyclone sheet; the third channel comprises a fifth channel section and a sixth channel section communicated with the fifth channel section, and the second channel section, the fifth channel section, the sixth channel section and the fourth channel section are communicated in sequence; wherein the projection of the second channel section on the projection plane coincides with the projection of the fifth channel section on the projection plane; the projection of the fourth channel segment on the projection surface coincides with the projection of the sixth channel segment on the projection surface; the projection surface is perpendicular to the preset direction.

Further, in the direction from the first channel section to the second channel section, the width of the first channel section perpendicular to the extending direction of the first channel section is gradually reduced, the width of the second channel section perpendicular to the extending direction of the second channel section is equal, and the width of the joint of the first channel section and the second channel section is equal; the width of the fifth channel section perpendicular to the extending direction thereof is equal to the width of the second channel section; and/or the width of the third channel section perpendicular to the extending direction of the third channel section is gradually reduced in the direction from the fourth channel section to the third channel section, the width of the fourth channel section perpendicular to the extending direction of the fourth channel section is equal, and the width of the joint of the third channel section and the fourth channel section is equal; the width of the sixth channel segment perpendicular to its extension is equal and identical to the width of the fourth channel segment.

Further, the width of the third channel perpendicular to the extending direction thereof is equal.

Further, a plurality of third channels are arranged at intervals along the circumferential direction of the first orifice plate; and/or each third channel is an arc-shaped channel along the extending direction; and/or each third channel comprises a seventh channel section, the first end of the seventh channel section is communicated with the fifth channel section, and the second end of the seventh channel section is communicated with the sixth channel section, so that fluid flows through the fifth channel section, the seventh channel section and the sixth channel section in sequence.

Further, the nozzle structure further comprises a second nozzle plate and a third nozzle plate, the second nozzle plate is arranged on one side of the first swirl plate far away from the first nozzle plate, and the inflow hole penetrates through the second nozzle plate along a preset direction; the third jet hole plate is arranged at one side of the second swirl plate far away from the first jet hole plate, and the jet holes penetrate through the second jet hole plate along a preset direction; wherein, the central lines of the inflow hole, the first through hole, the second through hole and the ejection hole are all overlapped.

According to another aspect of the utility model, there is provided an aftertreatment system comprising a nozzle and an SCR treatment unit, the nozzle being a nozzle as described above.

By applying the technical scheme of the utility model, the nozzle comprises a nozzle structure, the nozzle structure is provided with an inflow hole and an ejection hole, the nozzle structure comprises a first cyclone sheet, a first nozzle plate and a second cyclone sheet which are sequentially arranged along a preset direction, a first cyclone channel is arranged on the first cyclone sheet, a second cyclone channel is arranged on the second cyclone sheet, a communication channel is arranged on the first nozzle plate, the first cyclone channel comprises a plurality of first channels and a first through hole communicated with the inflow hole, and the second cyclone channel comprises a plurality of second channels and a second through hole communicated with the ejection hole. The urea solution flows into the first through holes from the inflow holes and then flows into the first channels to form rotational flows, then flows through the communication channels to enter the second channels to form rotational flows, then flows into the second through holes, finally flows out of the nozzle structures from the ejection holes, and flows in the first rotational flow sheets and the second rotational flow sheets twice, so that the rotational flow effect is enhanced by fully utilizing the length of the flow channels, the urea solution is atomized under the action of shearing force twice, and the particle size of liquid drops is reduced; and carry out the transmission of swirl intensity through first orifice plate, consequently, this nozzle has increased the swirl intensity and the atomization degree of urea solution, helps reducing spray granularity to nozzle atomization effect among the prior art is not good, the great problem of spun spray granularity has been solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic view of a first swirl plate of a nozzle according to the utility model;

fig. 2 shows a schematic view of a first orifice plate of a nozzle according to the utility model;

FIG. 3 shows a schematic view of a second swirl plate of a nozzle according to the utility model;

fig. 4 shows a schematic view of a third orifice plate of a nozzle according to the utility model;

FIG. 5 shows a perspective view of the spout structure of the nozzle according to the present utility model;

FIG. 6 shows a cross-sectional view of the spout structure of a nozzle according to the present utility model;

fig. 7 shows a schematic view of an embodiment of a nozzle according to the utility model.

Wherein the above figures include the following reference numerals:

1. a urea pipe quick-change joint; 2. a valve body; 3. an electromagnetic unit; 10. a spout structure; 11. an inflow hole; 12. a discharge hole; 13. a first swirl plate; 131. a first swirl passage; 132. a first channel; 1321. a first channel segment; 1322. a second channel segment; 133. a first through hole; 14. a first orifice plate; 141. a communication passage; 145. a third channel; 1451. a fifth channel segment; 1452. a sixth channel segment; 1454. a seventh channel segment; 15. a second swirl plate; 151. a second swirl passage; 152. a second channel; 1521. a third channel segment; 1522. a fourth channel segment; 153. a second through hole; 16. a second orifice plate; 17. and a third orifice plate.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The utility model provides a nozzle, please refer to fig. 1-7, comprising a nozzle structure 10, wherein the nozzle structure 10 is provided with an inflow hole 11 and an ejection hole 12, the nozzle structure 10 comprises a first swirl plate 13, a first orifice plate 14 and a second swirl plate 15 which are sequentially arranged along a preset direction, the first swirl plate 13 is provided with a first swirl channel 131, the second swirl plate 15 is provided with a second swirl channel 151, and the first orifice plate 14 is provided with a communication channel 141; the first swirl passage 131 includes a plurality of first passages 132 and a first through hole 133 communicating with the inflow hole 11, and the first through hole 133 and the plurality of first passages 132 are all provided to penetrate the first swirl plate 13 along a preset direction; the plurality of first passages 132 are arranged at intervals along the circumferential direction of the first through holes 133, and each first passage 132 is communicated with the first through hole 133 and extends from the first through hole 133 toward the edge of the first swirl plate 13; the second swirl passage 151 includes a plurality of second passages 152 and second through holes 153 communicating with the ejection holes 12, the second through holes 153 and the plurality of second passages 152 each being provided through the second swirl sheet 15 in a preset direction; the plurality of second passages 152 are arranged at intervals along the circumferential direction of the second through holes 153, and each second passage 152 is communicated with the second through hole 153 and extends from the second through hole 153 toward the edge of the second swirl plate 15; the plurality of second passages 152 communicate with the plurality of first passages 132 through the communication passage 141.

The nozzle of the present utility model comprises a nozzle structure 10, the nozzle structure 10 is provided with an inflow hole 11 and an outflow hole 12, the nozzle structure 10 comprises a first swirl plate 13, a first nozzle plate 14 and a second swirl plate 15 which are sequentially arranged along a preset direction, a first swirl channel 131 is arranged on the first swirl plate 13, a second swirl channel 151 is arranged on the second swirl plate 15, a communication channel 141 is arranged on the first nozzle plate 14, the first swirl channel 131 comprises a plurality of first channels 132 and a first through hole 133 communicated with the inflow hole 11, and the second swirl channel 151 comprises a plurality of second channels 152 and a second through hole 153 communicated with the outflow hole 12. Urea solution flows into the first through holes 133 from the inflow holes 11 and then enters the first channels 132 to form rotational flow, then flows through the communication channels 141 and enters the second channels 152 to form rotational flow, then flows into the second through holes 153, finally flows out of the nozzle structure 10 from the ejection holes 12, and flows in the first rotational flow sheet 13 and the second rotational flow sheet 15 twice, so that the rotational flow effect of increasing the length of the flow channels is fully utilized, the urea solution is atomized under the action of shearing force twice, and the particle size of liquid drops is reduced; and the rotational flow strength is transferred through the first spray hole plate 14, so that the rotational flow strength and atomization degree of urea solution are increased by the spray nozzle, and the spray granularity is reduced, so that the problems of poor spray effect and large sprayed spray granularity in the prior art are solved.

The preset direction is the left-right direction in fig. 6.

In this embodiment, each first channel 132 has a first communication end and a first closed end sequentially arranged along the extending direction thereof, the first communication end is communicated with the first through hole 133, and the first closed end extends toward the edge of the first swirl sheet 13; wherein, in the direction from the first communication end to the first closed end, the width of the first channel 132 perpendicular to the extending direction thereof is gradually reduced; and/or, each second channel 152 has a second communication end and a second closed end sequentially arranged along the extending direction thereof, the second communication end is communicated with the second through hole 153, and the second closed end extends towards the edge of the second cyclone sheet 15; wherein, in the direction from the second closed end to the second communicating end, the width of the second channel 152 perpendicular to the extending direction thereof is gradually reduced.

Specifically, the urea solution forms a swirling flow in the first swirling flow channel 131 in a direction from the first communication end to the first closed end, and the width of the first channel 132 perpendicular to the extending direction thereof is gradually reduced, so that the flow velocity of the urea solution is gradually increased in a direction from the first communication end to the first closed end, which helps to increase the swirling flow intensity and atomization degree of the urea solution in the first swirling flow channel 131.

Specifically, in the direction from the second closed end to the second communicating end, the urea solution forms a swirling flow in the second swirling flow channel 151, and the width of the second channel 152 perpendicular to the extending direction thereof is gradually reduced, so that the flow velocity of the urea solution is gradually increased, which is helpful to increase the swirling flow intensity and atomization degree of the urea solution in the second swirling flow channel 151.

In the present embodiment, each of the first passages 132 is an arc-shaped passage along the extending direction thereof; and/or each second channel 152 is an arcuate channel along its extension. That is, the first channel 132 extends in the direction of extension of the first arc, and the second channel 152 extends in the direction of extension of the second arc.

Specifically, the design of the arc-shaped channel can reduce collision and friction between the urea solution and the first channel 132 and the second channel 152, which is helpful for smooth flow of the urea solution, and further ensures the rotational flow strength of the urea solution in the first rotational flow channel 131 and the second rotational flow channel 151.

In the present embodiment, each of the first passages 132 is an arc-shaped passage along the extending direction thereof; each of the second passages 152 is an arc-shaped passage along the extending direction thereof; the rotation directions of the first channels 132 are the same, the rotation directions of the second channels 152 are the same, and the rotation directions of the first channels 132 are opposite to the rotation directions of the second channels 152.

Specifically, the rotation directions of the first channels 132 are opposite to the rotation directions of the second channels 152, which is helpful to increase the rotational flow strength of the urea solution in the first rotational flow channel 131 and the second rotational flow channel 151, further strengthen the rotational flow effect and atomization effect of the urea solution, and further reduce the granularity of the urea spray.

In the present embodiment, the projection of the first communication end of each first channel 132, which communicates with the first through hole 133, on the projection surface is a first projection; the projection of the second communication end of each second channel 152, which communicates with the second through hole 153, on the projection surface is a second projection; the projection of the first through hole 133 on the projection surface is a third projection; the plurality of first projections and the plurality of second projections are alternately arranged in turn in the circumferential direction of the third projection; the projection surface is perpendicular to the preset direction.

Specifically, the plurality of first projections and the plurality of second projections are alternately arranged in order in the circumferential direction of the third projection, so that the flow distance of the urea solution when flowing from the first passage 132 into the second passage 152 becomes large, thereby increasing the swirling strength of the urea solution.

Optionally, the first projection and the second projection that are adjacently disposed are disposed at intervals in a circumferential direction of the third projection. Such an arrangement further increases the flow distance and the swirl strength of the urea solution.

In the present embodiment, the communication passage 141 includes a plurality of third passages 145, the first passage 132, the second passage 152, and the third passage 145 are provided in pairs, and the first passage 132, the second passage 152, and the third passage 145 provided in pairs communicate; the first passage 132 includes a first passage section 1321 and a second passage section 1322 communicating with the first passage section 1321, the first passage section 1321 and the second passage section 1322 being sequentially arranged in a direction from the first through hole 133 to an edge of the first swirl plate 13; the second channel 152 includes a third channel segment 1521 and a fourth channel segment 1522 that is communicated with the third channel segment 1521, the third channel segment 1521 and the fourth channel segment 1522 being sequentially arranged in a direction from the second through hole 153 to the edge of the second cyclone sheet 15; the third channel 145 includes a fifth channel segment 1451 and a sixth channel segment 1452 in communication with the fifth channel segment 1451, the second channel segment 1322, the fifth channel segment 1451, the sixth channel segment 1452 and the fourth channel segment 1522 being in communication; wherein the projection of the second channel segment 1322 on the projection plane coincides with the projection of the fifth channel segment 1451 on the projection plane; the projection of the fourth channel segment 1522 onto the projection surface coincides with the projection of the sixth channel segment 1452 onto the projection surface; the projection surface is perpendicular to the preset direction.

Specifically, the urea solution flows through the first through-hole 133, the first passage section 1321, and the second passage section 1322 in this order, flows from the first rotational flow passage 131 into the communication passage 141, then flows into the second passage 152 via the fifth passage section 1451 and the sixth passage section 1452, and then flows out of the second rotational flow passage 151 via the fourth passage section 1522, the third passage section 1521, and the second through-hole 153; the projection of the second channel segment 1322 on the projection plane coincides with the projection of the fifth channel segment 1451 on the projection plane, so that the sufficient flow of the urea solution in the process of entering the third channel 145 from the first channel 132 is ensured, and the rotational flow strength of the urea solution is further ensured; the projection of the fourth channel segment 1522 on the projection surface coincides with the projection of the sixth channel segment 1452 on the projection surface, so as to ensure the sufficient flow of the urea solution in the process of entering the second channel 152 from the third channel 145, and further ensure the rotational flow strength of the urea solution.

In the present embodiment, in the direction from the first passage section 1321 to the second passage section 1322, the width of the first passage section 1321 perpendicular to the extending direction thereof gradually decreases, the width of the second passage section 1322 perpendicular to the extending direction thereof is equal, and the width at the junction of the first passage section 1321 and the second passage section 1322 is equal; the width of the fifth passage segment 1451 perpendicular to the extending direction thereof is equal and the same as the width of the second passage segment 1322; and/or, in the direction from the fourth channel segment 1522 to the third channel segment 1521, the width of the third channel segment 1521 perpendicular to the extending direction thereof gradually decreases, the width of the fourth channel segment 1522 perpendicular to the extending direction thereof is equal, and the width of the junction of the third channel segment 1521 and the fourth channel segment 1522 is equal; the width of the sixth channel segment 1452 perpendicular to its extension is equal and the same as the width of the fourth channel segment 1522. I.e. the width of the second passage segment 1322 is unchanged along the extending direction thereof, being an equally wide passage; the width of the fourth channel segment 1522 is constant along its extension, being an equally wide channel.

Specifically, in the direction from the first passage section 1321 to the second passage section 1322, the width of the first passage section 1321 perpendicular to the extending direction thereof gradually decreases, so that the flow velocity of the urea solution gradually increases in the first passage section 1321, thereby increasing the swirling strength of the urea solution; the width of the second passage segment 1322 perpendicular to the extending direction thereof is equal, and the width of the junction of the first passage segment 1321 and the second passage segment 1322 is equal, which is helpful to realize the smooth transition of the urea solution from the first passage segment 1321 to the second passage segment 1322; the width of the fifth channel segment 1451 perpendicular to the extending direction thereof is equal to the width of the second channel segment 1322, which is helpful for the urea solution to smoothly flow from the first swirl channel 131 to the communication channel 141, thereby ensuring that the first orifice plate 14 can perform the swirl strength transfer.

Specifically, in the direction from the fourth channel segment 1522 to the third channel segment 1521, the width of the third channel segment 1521 perpendicular to the extending direction thereof is gradually reduced, so that the flow velocity of the urea solution is gradually increased in the third channel segment 1521, thereby increasing the rotational flow strength of the urea solution; the width of the fourth channel segment 1522 perpendicular to the extending direction thereof is equal, and the width of the junction of the third channel segment 1521 and the fourth channel segment 1522 is equal, which is helpful to realize the smooth transition of urea solution from the fourth channel segment 1522 to the third channel segment 1521; the width of the sixth channel segment 1452 perpendicular to the extending direction thereof is equal to the width of the fourth channel segment 1522, which is helpful for the urea solution to smoothly flow from the communicating channel 141 to the second cyclone channel 151, thereby ensuring that the first orifice plate 14 can perform the cyclone strength transfer.

In the present embodiment, the widths of the third channels 145 perpendicular to the extending direction thereof are equal, i.e., the widths of the third channels 145 are constant along the extending direction thereof, and become equal-width channels. Such an arrangement facilitates smooth flow of urea solution in the third channel 145, which in turn facilitates smooth transfer of swirl strength to the first orifice plate 14.

In the present embodiment, the plurality of third passages 145 are provided at intervals in the circumferential direction of the first orifice plate 14; and/or each third channel 145 is an arc-shaped channel along its extension; and/or each third channel 145 includes a seventh channel segment 1454, a first end of the seventh channel segment 1454 being in communication with the fifth channel segment 1451, a second end of the seventh channel segment 1454 being in communication with the sixth channel segment 1452 such that fluid flows through the fifth channel segment 1451, the seventh channel segment 1454 and the sixth channel segment 1452 in sequence.

Specifically, the plurality of third channels 145 are arranged at intervals along the circumferential direction of the first orifice plate 14, so that urea solution can flow from the first cyclone channel 131 to the second cyclone channel 151 sufficiently, and the first orifice plate 14 can be guaranteed to complete the transfer of the cyclone strength sufficiently.

Specifically, the seventh channel segment 1454 is configured to communicate with the fifth channel segment 1451 and the sixth channel segment 1452 such that fluid flows through the fifth channel segment 1451, the seventh channel segment 1454 and the sixth channel segment 1452 in sequence.

In this embodiment, the nozzle structure 10 further includes a second nozzle plate 16 and a third nozzle plate 17, where the second nozzle plate 16 is disposed on a side of the first swirl sheet 13 away from the first nozzle plate 14, and the inflow hole 11 is disposed through the second nozzle plate 16 along a preset direction; the third jet plate 17 is arranged on one side of the second swirl plate 15 far away from the first jet plate 14, and the jet holes 12 are arranged to penetrate through the second jet plate 16 along a preset direction; wherein, the central lines of the inflow hole 11, the first through hole 133, the second through hole 153 and the ejection hole 12 are all overlapped and all extend along the preset direction.

Specifically, the urea solution flows through the second orifice plate 16, the first swirl plate 13, the first orifice plate 14, the second swirl plate 15, and the third orifice plate 17 in this order, and then flows out of the orifice structure 10. The structure fully utilizes the length of the flow channel of the spout structure 10 to enhance the rotational flow effect of the urea solution, and simultaneously utilizes the first orifice plate 14 to realize the transmission of the rotational flow strength of the urea solution between the first rotational flow sheet 13 and the second rotational flow sheet 15, thereby ensuring the rotational flow effect of the spout structure 10.

Specifically, the centerlines of the inflow hole 11, the first through hole 133, the second through hole 153, and the ejection hole 12 are all arranged in superposition, so that the flow rate of the urea solution is ensured, and the urea spray can be prevented from deviating from the preset injection range.

Specifically, as shown in fig. 7, the nozzle of the utility model further comprises a urea pipe quick-change connector 1, a valve body 2 and an electromagnetic unit 3, wherein the urea pipe quick-change connector 1 is connected with a urea pressure pipe in normal use, a urea injection signal wire is inserted into the connector of the electromagnetic unit 3, and when the urea injection signal is sent to the electromagnetic unit 3, the electromagnetic unit 3 is electrified, the valve body 2 is pulled to move leftwards, so that the nozzle is opened; the electromagnetic unit 3 is powered down, and the valve body 2 moves rightward under the action of the spring force, so that the nozzle is closed. Wherein the valve body 2 is used for opening and closing the inflow hole 11.

The utility model also provides an aftertreatment system, which comprises a nozzle and an SCR treatment unit, wherein the nozzle is the nozzle in the embodiment.

The aftertreatment system of the present utility model includes a nozzle and an SCR treatment unit, the nozzle is the nozzle in the above embodiment, the nozzle includes a nozzle structure 10, the nozzle structure 10 has an inflow hole 11 and an outflow hole 12, the nozzle structure 10 includes a first swirl plate 13, a first orifice plate 14 and a second swirl plate 15 sequentially disposed along a preset direction, the first swirl plate 13 is provided with a first swirl channel 131, the second swirl plate 15 is provided with a second swirl channel 151, the first orifice plate 14 is provided with a communication channel 141, the first swirl channel 131 includes a plurality of first channels 132 and a first through hole 133 communicating with the inflow hole 11, and the second swirl channel 151 includes a plurality of second channels 152 and a second through hole 153 communicating with the outflow hole 12. Urea solution flows into the first through holes 133 from the inflow holes 11 and then enters the first channels 132 to form rotational flow, then flows through the communication channels 141 and enters the second channels 152 to form rotational flow, then flows into the second through holes 153, finally flows out of the nozzle structure 10 from the ejection holes 12, and flows in the first rotational flow sheet 13 and the second rotational flow sheet 15 twice, so that the rotational flow effect of increasing the length of the flow channels is fully utilized, the urea solution is atomized under the action of shearing force twice, and the particle size of liquid drops is reduced; and the rotational flow strength is transferred through the first spray hole plate 14, so that the rotational flow strength and atomization degree of urea solution are increased by the spray nozzle, and the spray granularity is reduced, so that the problems of poor spray effect and large sprayed spray granularity in the prior art are solved.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

the nozzle of the present utility model comprises a nozzle structure 10, the nozzle structure 10 is provided with an inflow hole 11 and an outflow hole 12, the nozzle structure 10 comprises a first swirl plate 13, a first nozzle plate 14 and a second swirl plate 15 which are sequentially arranged along a preset direction, a first swirl channel 131 is arranged on the first swirl plate 13, a second swirl channel 151 is arranged on the second swirl plate 15, a communication channel 141 is arranged on the first nozzle plate 14, the first swirl channel 131 comprises a plurality of first channels 132 and a first through hole 133 communicated with the inflow hole 11, and the second swirl channel 151 comprises a plurality of second channels 152 and a second through hole 153 communicated with the outflow hole 12. Urea solution flows into the first through holes 133 from the inflow holes 11 and then enters the first channels 132 to form rotational flow, then flows through the communication channels 141 and enters the second channels 152 to form rotational flow, then flows into the second through holes 153, finally flows out of the nozzle structure 10 from the ejection holes 12, and flows in the first rotational flow sheet 13 and the second rotational flow sheet 15 twice, so that the rotational flow effect of increasing the length of the flow channels is fully utilized, the urea solution is atomized under the action of shearing force twice, and the particle size of liquid drops is reduced; and the rotational flow strength is transferred through the first spray hole plate 14, so that the rotational flow strength and atomization degree of urea solution are increased by the spray nozzle, and the spray granularity is reduced, so that the problems of poor spray effect and large sprayed spray granularity in the prior art are solved.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations 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 "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (12)

1. The nozzle comprises a nozzle structure (10), wherein the nozzle structure (10) is provided with an inflow hole (11) and an ejection hole (12), and is characterized in that the nozzle structure (10) comprises a first swirl plate (13), a first orifice plate (14) and a second swirl plate (15) which are sequentially arranged along a preset direction, a first swirl channel (131) is arranged on the first swirl plate (13), a second swirl channel (151) is arranged on the second swirl plate (15), and a communication channel (141) is arranged on the first orifice plate (14);

the first swirl passage (131) comprises a plurality of first passages (132) and first through holes (133) communicated with the inflow holes (11), and the first through holes (133) and the first passages (132) are all arranged along the preset direction and penetrate through the first swirl plates (13); the first channels (132) are arranged at intervals along the circumferential direction of the first through holes (133), and each first channel (132) is communicated with the first through hole (133) and extends from the first through hole (133) towards the edge of the first cyclone sheet (13);

the second rotational flow channel (151) comprises a plurality of second channels (152) and second through holes (153) communicated with the ejection holes (12), and the second through holes (153) and the second channels (152) are all arranged along the preset direction and penetrate through the second rotational flow sheet (15); the second channels (152) are arranged at intervals along the circumferential direction of the second through holes (153), and each second channel (152) is communicated with the second through hole (153) and extends from the second through hole (153) towards the edge of the second cyclone sheet (15); a plurality of the second passages (152) communicate with a plurality of the first passages (132) through the communication passage (141).

2. The nozzle of claim 1, wherein the nozzle is configured to,

each first channel (132) is provided with a first communication end and a first closed end which are sequentially arranged along the extending direction, the first communication end is communicated with the first through hole (133), and the first closed end extends towards the edge of the first swirl plate (13); wherein the width of the first channel (132) perpendicular to the extending direction thereof gradually decreases in the direction from the first communicating end to the first closed end; and/or the number of the groups of groups,

each second channel (152) is provided with a second communication end and a second closed end which are sequentially arranged along the extending direction, the second communication end is communicated with the second through hole (153), and the second closed end extends towards the edge of the second cyclone sheet (15); wherein the width of the second channel (152) perpendicular to the extending direction thereof gradually decreases in the direction from the second closed end to the second communicating end.

3. The nozzle of claim 1, wherein the nozzle is configured to,

each first channel (132) is an arc-shaped channel along the extending direction; and/or the number of the groups of groups,

each of the second passages (152) is an arc-shaped passage along the extending direction thereof.

4. The nozzle of claim 1, wherein each of the first passages (132) is an arcuate passage along its extension; each second channel (152) is an arc-shaped channel along the extending direction;

the rotation directions of the first channels (132) are the same, the rotation directions of the second channels (152) are the same, and the rotation directions of the first channels (132) are opposite to the rotation directions of the second channels (152).

5. The nozzle according to claim 1, characterized in that the projection of the first communication end of each first channel (132) communicating with the first communication opening (133) on the projection surface is a first projection; the projection of the second communication end of each second channel (152) communicated with the second through hole (153) on the projection surface is a second projection; the projection of the first through hole (133) on the projection surface is a third projection; the plurality of first projections and the plurality of second projections are alternately arranged in turn in the circumferential direction of the third projection; the projection surface is perpendicular to the preset direction.

6. The nozzle of claim 5, wherein the adjacently disposed first and second projections are spaced apart in a circumferential direction of the third projection.

7. The nozzle according to claim 1, wherein the communication passage (141) includes a plurality of third passages (145), the first passages (132), the second passages (152), and the third passages (145) are provided in pairs, and the first passages (132), the second passages (152), and the third passages (145) provided in pairs are communicated;

the first channel (132) comprises a first channel section (1321) and a second channel section (1322) communicated with the first channel section (1321), and the first channel section (1321) and the second channel section (1322) are sequentially arranged in the direction from the first through hole (133) to the edge of the first swirl plate (13);

the second channel (152) comprises a third channel section (1521) and a fourth channel section (1522) communicated with the third channel section (1521), and the third channel section (1521) and the fourth channel section (1522) are sequentially arranged in the direction from the second through hole (153) to the edge of the second cyclone sheet (15);

the third channel (145) comprises a fifth channel segment (1451) and a sixth channel segment (1452) communicated with the fifth channel segment (1451), and the second channel segment (1322), the fifth channel segment (1451), the sixth channel segment (1452) and the fourth channel segment (1522) are communicated in sequence;

wherein the projection of the second channel segment (1322) on the projection surface coincides with the projection of the fifth channel segment (1451) on the projection surface; the projection of the fourth channel segment (1522) onto the projection surface coincides with the projection of the sixth channel segment (1452) onto the projection surface; the projection surface is perpendicular to the preset direction.

8. The nozzle of claim 7, wherein the nozzle is configured to,

in a direction from the first passage section (1321) to the second passage section (1322), a width of the first passage section (1321) perpendicular to an extending direction thereof is gradually reduced, a width of the second passage section (1322) perpendicular to the extending direction thereof is equal, and a width at a junction of the first passage section (1321) and the second passage section (1322) is equal; the width of the fifth channel segment (1451) perpendicular to the direction of extension thereof is equal and the same as the width of the second channel segment (1322); and/or the number of the groups of groups,

in the direction from the fourth channel section (1522) to the third channel section (1521), the width of the third channel section (1521) perpendicular to the direction of extension thereof is gradually reduced, the width of the fourth channel section (1522) perpendicular to the direction of extension thereof is equal, and the width of the junction of the third channel section (1521) and the fourth channel section (1522) is equal; the width of the sixth channel section (1452) perpendicular to its extension is equal and identical to the width of the fourth channel section (1522).

9. The nozzle according to claim 8, characterized in that the width of the third channels (145) perpendicular to their extension direction is equal.

10. The nozzle of claim 7, wherein the nozzle is configured to,

a plurality of third passages (145) are arranged at intervals along the circumferential direction of the first orifice plate (14); and/or the number of the groups of groups,

each third channel (145) is an arc-shaped channel along the extending direction; and/or the number of the groups of groups,

each of the third channels (145) includes a seventh channel segment (1454), a first end of the seventh channel segment (1454) being in communication with the fifth channel segment (1451), a second end of the seventh channel segment (1454) being in communication with the sixth channel segment (1452) such that fluid flows through the fifth channel segment (1451), the seventh channel segment (1454) and the sixth channel segment (1452) in sequence.

11. The nozzle according to any one of claims 1 to 10, characterized in that the spout structure (10) further comprises a second orifice plate (16) and a third orifice plate (17), the second orifice plate (16) being arranged at a side of the first swirl sheet (13) remote from the first orifice plate (14), the inflow orifice (11) being arranged through the second orifice plate (16) in the preset direction; the third jet orifice plate (17) is arranged on one side, far away from the first jet orifice plate (14), of the second rotational flow sheet (15), and the jet orifice (12) penetrates through the second jet orifice plate (16) along the preset direction;

wherein the center lines of the inflow hole (11), the first through hole (133), the second through hole (153), and the discharge hole (12) are all arranged in a superposed manner.

12. An aftertreatment system comprising a nozzle and an SCR treatment unit, wherein the nozzle is as claimed in any one of claims 1 to 11.