CN210239796U

CN210239796U - SCR urea nozzle

Info

Publication number: CN210239796U
Application number: CN201920294217.6U
Authority: CN
Inventors: Yixin Gu; 顾一新
Original assignee: Dongguan Zhengyang Electronic Mechanical Co ltd
Current assignee: Guangdong Zhengyang Sensor Technology Co ltd
Priority date: 2019-03-08
Filing date: 2019-03-08
Publication date: 2020-04-03
Anticipated expiration: 2029-03-08

Abstract

The utility model discloses a SCR urea nozzle, including feed liquor pipe structure, sprinkler structure and pedestal structure, the liquid inlet end of sprinkler structure is communicated with the liquid outlet end of feed liquor pipe structure, the sprinkler structure and the feed liquor pipe structure form a feed liquor channel together, the liquid outlet end of sprinkler structure is formed with the jet orifice that is communicated with the feed liquor channel; the utility model discloses a shower nozzle structure, including base structure, inlet tube structure and shower nozzle structure, the base structure is formed with and is winding the heat dissipation channel of inlet channel, the one end of heat dissipation channel is connected with into the gas pocket, the other end of heat dissipation channel is connected with the venthole, gaseous via the venthole gets into the inside of shower nozzle structure and outside blowout. The utility model discloses have processing simply, simple installation, be difficult for causing the nozzle to block up and the effectual technological effect of atomizing.

Description

SCR urea nozzle

Technical Field

The utility model relates to an automobile exhaust handles technical field, especially relates to a SCR urea nozzle.

Background

SCR systems are now mature and effective for reducing emissions from diesel Nox. However, with the increasing emission regulations, the requirements for the parts of the SCR system are also increasing, and the traditional metering valve nozzle is to manufacture a cooling water channel on a mounting base to cool the metering valve nozzle base so as to prevent the base from being too hot and further burn out the metering valve, but the manufacturing of the cooling water channel on the mounting base has the problems of difficult processing and complex installation. In addition, the metering valve nozzle needs smaller aperture and smooth finish to realize better atomized particle size, the requirement on the processing precision of the nozzle micropore is high in process, the processing is complex, the nozzle is easy to block when in later use, and the atomized particle size is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a processing is simple, the simple installation, be difficult for causing the nozzle to block up and the effectual SCR urea nozzle of atomizing.

In order to achieve the above object, the utility model provides a SCR urea nozzle, including a liquid inlet pipe structure, a spray head structure and a base structure, wherein a liquid inlet end of the spray head structure is communicated with a liquid outlet end of the liquid inlet pipe structure, the spray head structure and the liquid inlet pipe structure together form a liquid inlet channel, and a spray hole communicated with the liquid inlet channel is formed at a liquid outlet end of the spray head structure; the utility model discloses a shower nozzle structure, including base structure, inlet tube structure and shower nozzle structure, the base structure is formed with and is winding the heat dissipation channel of inlet channel, the one end of heat dissipation channel is connected with into the gas pocket, the other end of heat dissipation channel is connected with the venthole, gaseous via the venthole gets into the inside of shower nozzle structure and outside blowout.

The liquid inlet pipe structure comprises a metering valve, and the liquid outlet end of the metering valve is communicated with the liquid inlet end of the spray head structure.

Preferably, the nozzle structure includes a nozzle and a nozzle sleeve, the liquid inlet end of the nozzle is communicated with the liquid outlet end of the liquid inlet pipe structure, the nozzle sleeve surrounds the nozzle, a gas passage is formed between the nozzle sleeve and the nozzle, the gas outlet is communicated with the gas passage, and the nozzle sleeve is provided with an outlet hole corresponding to the spray hole.

Preferably, the gas channel includes a gas buffer area and a gas injection area, the gas buffer area is communicated with the gas outlet, the gas injection area is communicated between the gas buffer area and the outlet hole, and the gas injection area gradually narrows from one end connected with the gas buffer area to one end connected with the outlet hole.

Preferably, the heat dissipation channel is arranged in a vertically winding manner.

Preferably, the seat structure comprises an inner circumferential wall and an outer circumferential wall which are arranged at intervals, a bottom wall, a top wall and a plurality of radiating fins which are arranged at intervals around the inner circumferential wall, the inner circumferential wall is arranged around the liquid inlet channel, the inner edges of the plurality of radiating fins are hermetically connected to the inner circumferential wall, the outer edges of the plurality of radiating fins are hermetically connected to the outer circumferential wall, a plurality of sub-channels are formed among the plurality of radiating fins, the plurality of radiating fins comprise a plurality of first radiating fins, a plurality of second radiating fins and third radiating fins, the plurality of first radiating fins and the second radiating fins are arranged in a mutually staggered manner, the lower ends of the plurality of first radiating fins are hermetically connected to the bottom wall, the upper ends of the plurality of first radiating fins are respectively provided with an upper through groove, the upper ends of the plurality of second radiating fins are hermetically connected to the top, the upper end and the lower end of the third radiating fin are respectively connected to the top wall and the bottom wall in a sealing mode, the sub-channels, the upper through groove and the lower through groove are correspondingly communicated to form the radiating channels, the air inlet hole and the air outlet hole are respectively communicated to the respective sub-channels adjacent to the third radiating fin, and the air outlet hole penetrates through the bottom wall to be communicated with the interior of the sprayer structure.

Preferably, the base structure includes a base and a bottom cover fixed to the base in an inserted manner, the base includes the outer peripheral wall and the top wall, the outer peripheral wall forms a plurality of second cooling fins in an inward protruding manner, the inner peripheral wall is connected with the top wall in a sealing manner, a through hole is formed in the middle of the top wall, the air inlet hole forms in the base, the bottom cover includes the inner peripheral wall and the bottom wall, the inner peripheral wall forms in an outward protruding manner, the outer edge of the first cooling fins is connected with the outer peripheral wall in a sealing manner, and the inner peripheral wall corresponds to the through hole.

Preferably, the upper end of the inner peripheral wall is adapted to be inserted into the through hole.

Preferably, the bottom of the bottom cover is provided with a flange protruding outwards, and the flange is attached to the bottom surface of the base.

Preferably, the bottom cover further comprises a mounting hole which is located in the middle and penetrates up and down, the spray head structure is mounted in the mounting hole, the spray head structure is mounted at the lower portion of the mounting hole, and the liquid inlet pipe structure is mounted at the upper portion of the mounting hole.

Compared with the prior art, the base structure of the SCR urea nozzle of the utility model is provided with the heat dissipation channel which is wound in a winding way around the liquid inlet channel, one end of the heat dissipation channel is connected with the air inlet hole, the other end of the heat dissipation channel is connected with the air outlet hole, and the gas enters the interior of the nozzle structure through the air outlet hole and is sprayed out; thereby make auxiliary gas can get into heat dissipation channel and at heat dissipation channel inner loop flow by going into the gas pocket, flow from the venthole again, can realize good radiating effect, can not cause the influence to feed liquor pipe structure, need not to process the cooling water passageway on the seat body structure, processing is simple relatively and simple installation. Through the design, the auxiliary gas can be conveniently mixed with the sprayed liquid after flowing out of the gas outlet, so that more uniform atomization can be realized, and the requirement on the aperture of the spray head is reduced, so that the aperture of the spray head can be properly increased, and the processing is simpler; and atomization is carried out without processing micropores, and the risk of nozzle blockage is also reduced.

Drawings

Fig. 1 is a schematic structural diagram of an SCR urea nozzle according to an embodiment of the present invention.

FIG. 2 is a top view of the SCR urea nozzle shown in FIG. 1.

Fig. 3 is a schematic cross-sectional view taken along line a-a of fig. 2.

Fig. 4 is a schematic cross-sectional view taken along line B-B of fig. 2.

Fig. 5 is an exploded view of the sprinkler structure of fig. 1.

Fig. 6 is a schematic view of the base of fig. 5 from another perspective.

Fig. 7 is a cross-sectional view of the bottom cover shown in fig. 5.

FIG. 8 is a schematic cross-sectional view of an SCR urea nozzle according to another embodiment of the present invention.

Detailed Description

In order to explain the contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, and thus, should not be construed as limiting the scope of the present invention.

Referring to fig. 1 to 8, the utility model discloses an SCR urea nozzle, which comprises a liquid inlet pipe structure 1, a spray head structure 2 and a base structure 3, wherein a liquid inlet end of the spray head structure 2 is communicated with a liquid outlet end of the liquid inlet pipe structure 1, the spray head structure 2 and the liquid inlet pipe structure 1 jointly form a liquid inlet channel 4, and a spray hole 211 communicated with the liquid inlet channel 4 is formed at a liquid outlet end of the spray head structure 2; inlet structure 1 and shower nozzle structure 2 fixed mounting are on pedestal structure 3, are formed with the heat dissipation channel who is winding ground around inlet channel 4 on the pedestal structure 3, and heat dissipation channel's one end is connected with into gas pocket 302, and heat dissipation channel's the other end is connected with venthole 303, and gaseous inside and outside blowout that gets into shower nozzle structure 2 via venthole 303. Through the design, the auxiliary gas can enter the heat dissipation channel from the gas inlet hole 302 and flows in the heat dissipation channel in a circulating manner, and then flows out of the gas outlet hole 303, so that a good heat dissipation effect can be realized, the liquid inlet pipe structure 1 cannot be influenced, the cooling water channel does not need to be processed on the base structure 3, and the processing is relatively simple and the installation is simple and convenient. Through the design, the auxiliary gas is convenient to mix with the sprayed liquid (urea solution) after flowing out of the gas outlet 303, so that more uniform atomization can be realized, and the requirement on the aperture of the spray head is reduced, so that the aperture of the spray head can be properly increased, and the processing is simpler; and atomization is carried out without processing micropores, and the risk of nozzle blockage is also reduced.

It should be noted that the heat dissipation channel may be only located at the liquid inlet channel 4 formed around the nozzle structure 2, may be located at the liquid inlet channel 4 formed around the liquid inlet pipe structure 1, or may be located at both the liquid inlet pipe structure 1 and the liquid inlet channel 4 of the nozzle structure 2 (as shown in the drawing), which is not limited herein. The liquid inlet pipe structure 1 can be fixedly installed on the base structure 3 through the spray head structure 2. Generally speaking, the diameter of the injection hole 211 is smaller than that of the liquid inlet channel 4, so that the urea solution has larger kinetic energy when reaching the injection hole 211 through the liquid inlet channel 4, and the injection effect is better; but not limited thereto.

Referring to fig. 3 and 4, in some embodiments, the liquid inlet pipe structure 1 includes a metering valve 10, and a liquid outlet end of the metering valve 10 is communicated with a liquid inlet end of the spray head structure 2; by the circulation of the auxiliary gas in the heat dissipation channel, the metering valve 10 can be prevented from being burnt. In practical applications, the amount of urea solution actually required is controlled by the metering valve 10 according to the detected concentration of nitrogen oxides in the exhaust gas of the automobile.

Referring to fig. 3 and 4, in some embodiments, the liquid inlet pipe structure 1 further includes an SAE joint 11, and a liquid outlet end of the SAE joint 11 is communicated with a liquid inlet end of the metering valve 10.

Referring to fig. 3 and 4, in some embodiments, the nozzle structure 2 includes a nozzle 21 and a nozzle cap 22, a liquid inlet end of the nozzle 21 is communicated with a liquid outlet end of the liquid inlet pipe structure 1, the nozzle cap 22 is disposed around the nozzle 21, a gas passage 200 is formed between the nozzle cap 22 and the nozzle 21, a gas outlet 303 is communicated with the gas passage 200, and the nozzle cap 22 is formed with an outlet 221 corresponding to the spray hole 211. Through the design, the problem that the nozzle can block the hole and has uneven atomization in later use is effectively solved, and the atomization effect is better.

Referring to fig. 3 and 4, as a specific embodiment, the outlet hole 221 of the nozzle cover 22 circumferentially covers the spraying hole 211, so that when the spraying hole 211 sprays liquid, the outlet hole 221 sprays gas, thereby achieving the effect of uniform mixing and atomization of the liquid and the gas in the outside.

Referring to fig. 8, as another specific embodiment, the outlet hole 221 of the nozzle cap 22 is located outside the spraying hole 211 in the liquid outlet direction and is opposite to the spraying hole 211, and the liquid is sprayed from the spraying hole 211, is rapidly mixed with the gas, and is sprayed from the outlet hole 221 of the nozzle cap 22.

As another specific embodiment (not shown), the spray head structure 2 may only include a spray head, the spray head is disposed around the liquid inlet pipe structure, and the gas enters the interior of the spray head through the gas outlet hole and is mixed with the liquid flowing out from the liquid inlet pipe structure to be sprayed out from the spray holes of the spray head.

Of course, the above embodiments are only specific embodiments of the nozzle structure 2, and the nozzle structure 2 should not be limited thereto, and any design that can be made by those skilled in the art according to the product configuration should be within the scope of the present invention.

Referring to fig. 3 and 4, in some embodiments, the gas channel 200 includes a gas buffer 201 and a gas injection region 202, the gas buffer 201 is in communication with the gas outlet 303, the gas injection region 202 is in communication between the gas buffer 201 and the outlet 221, and the gas injection region 202 is gradually narrowed from an end connected to the gas buffer 201 to an end connected to the outlet 221. As the gas injection area 202 is gradually narrowed, when the gas passes through the gas injection area 202 and reaches the outlet hole 221, the gas has larger kinetic energy, and the spraying effect of the gas and the atomization effect of the urea solution are better.

Referring to fig. 3 to 6, in some embodiments, the heat dissipation channel is arranged in a vertically meandering manner. But should not be so limited, for example, in other embodiments, the serpentine heat dissipation channel may be helically disposed.

Referring to fig. 3 to 6, in a preferred embodiment, the seat structure 3 includes an inner circumferential wall 321 and an outer circumferential wall 311 that are arranged at intervals, a bottom wall 322, a top wall 312, and a plurality of fins that are arranged at intervals around the inner circumferential wall 321, the inner circumferential wall 321 is arranged around the liquid inlet passage 4, inner edges of the plurality of fins are hermetically connected to the inner circumferential wall 321, outer edges of the plurality of fins are hermetically connected to the outer circumferential wall 311, a plurality of sub-passages 301 are formed between the plurality of fins, the plurality of fins include a plurality of first fins 323, a plurality of second fins 313 and third fins 324, the plurality of first fins 323 and second fins 313 are arranged in a staggered manner, lower ends of the plurality of first fins 323 are hermetically connected to the bottom wall 322, upper ends of the plurality of first fins 323 are respectively formed with upper through grooves 325, upper ends of the plurality of second fins 313 are hermetically connected to the top wall 312, lower ends, the upper end and the lower end of the third heat sink 324 are hermetically connected to the top wall 312 and the bottom wall 322, respectively, the plurality of sub-channels 301, the upper through groove 325 and the lower through groove 315 are correspondingly communicated to form heat dissipation channels, the air inlet hole 302 and the air outlet hole 303 are respectively communicated to the respective sub-channels 301 adjacent to the third heat sink 324, and the air outlet hole 303 penetrates through the bottom wall 322 to be communicated with the inside of the head structure 2. Through the design, the heat dissipation channel can achieve a better heat dissipation effect.

In a preferred embodiment, the plurality of fins are disposed at equal intervals, so that the gas flows smoothly along the heat dissipation channel while the heat dissipation effect is ensured, and the gas is stable when being ejected from the outlet hole 221.

As a preferred embodiment, the number of the third fins 324 is generally one, but not limited thereto. When the number of the third fins 324 is one, the air inlet hole 302 and the air outlet hole 303 are respectively communicated to the subchannels 301 on both sides of the third fins 324. In other embodiments, the case where the third heat radiation fins 324 have two or more is not excluded; for example, two adjacent third heat sinks 324 may be provided, in which case, the air inlet 302 and the air outlet 303 are respectively provided at the two sub-channels 301 outside the two third heat sinks 324; or, two third cooling fins 324 may be disposed approximately oppositely, at this time, the number of the cooling channels formed by correspondingly connecting the plurality of sub-channels 301, the upper through groove 325 and the lower through groove 315 is two, and correspondingly, two sets of air inlet holes 302 and air outlet holes 303 may be disposed correspondingly.

"upper through grooves 325 are formed at the upper ends of the first heat radiation fins 323, and lower through grooves 315 are formed at the lower ends of the second heat radiation fins 313". In some embodiments, the upper channel 325 may be formed between the first heat sink 323 and the top wall 312; for example, the first heat sink 323 and the top wall 312 are spaced to form an upper through groove 325, or an upper notch penetrating upward is formed on the outer side of the upper end of the first heat sink 323. In other embodiments, the upper through groove 325 may also be a through hole formed at the first heat sink 323, and the through hole is spaced apart from the upper end edge of the first heat sink 323. For the arrangement of the lower through groove 315, please refer to the arrangement of the upper through groove 325, which is not described herein.

In the particular embodiment shown in the drawings, the fins are of radially extending flat plate-like configuration; but should not be limited thereto. In other embodiments, the shape, configuration and extending direction of the heat sink can be designed in various ways; for example, the shape of the heat dissipation fin can be wave-shaped or S-shaped, and the implementation mode can have a better turbulent flow effect on gas, and meanwhile, the heat dissipation area is increased, so that the heat dissipation effect is better.

In a preferred embodiment, the air inlet hole 302 is disposed on the top wall 312, but is not limited thereto.

Referring to fig. 3 to 6, as a preferred embodiment, the base structure 3 includes a base 31 and a bottom cover 32 inserted and fixed on the base 31, the base 31 includes an outer circumferential wall 311 and a top wall 312, a plurality of second heat dissipation fins 313 are formed by the outer circumferential wall 311 protruding inward and having inner edges hermetically connected with the inner circumferential wall 321, a through hole 316 is formed in the middle of the top wall 312, the air inlet hole 302 is formed in the base 31, the bottom cover 32 includes an inner circumferential wall 321 and a bottom wall 322, a plurality of first heat dissipation fins 323 are formed by the inner circumferential wall 321 protruding outward and having outer edges hermetically connected with the outer circumferential wall 311, and the inner circumferential wall 321 and the through hole 316 are correspondingly disposed. Through the design, make the utility model discloses seat structure 3 with heat dissipation channel processes simply and simple installation.

As a preferred embodiment, the upper end of the inner peripheral wall 321 is adapted to be inserted into the through hole 316, so as to form a good sealing effect.

In a preferred embodiment, a flange 320 is formed at the bottom of the bottom cover 32 in an outward protruding manner, and the flange 320 is attached to the bottom surface of the base 31, so as to form a good sealing effect.

In a preferred embodiment, the air outlet holes 303 are arranged in an inward inclined manner.

In a preferred embodiment, the bottom cover 32 further includes a mounting hole 326 penetrating up and down in the middle, the nozzle structure 2 is mounted in the mounting hole 326, the nozzle structure 2 is mounted at the lower portion of the mounting hole 326, and the inlet pipe structure 1 is mounted at the upper portion of the mounting hole 326.

Referring to fig. 7, as a preferred embodiment, the nozzle structure 2 includes a nozzle 21 and a nozzle cap 22, the mounting hole 326 includes a liquid inlet mounting hole 327 located at an upper portion, a nozzle mounting hole 328 located at a middle portion, and a nozzle cap mounting hole 329 located at a lower portion, the liquid inlet mounting hole 327 is used for mounting the liquid inlet pipe structure 1, the nozzle mounting hole 328 is used for mounting the nozzle 21, the nozzle cap mounting hole 329 is used for mounting the nozzle cap 22, a liquid inlet end of the nozzle 21 is communicated with a liquid outlet end of the liquid inlet pipe structure 1, the nozzle cap 22 is disposed around the nozzle 21, a gas channel 200 is formed between the nozzle cap 22 and the nozzle 21, the gas outlet hole 303 is communicated with the gas channel 200, and the nozzle cap 22 is formed with an outlet hole 221 corresponding to the.

In a preferred embodiment, the bottom cover 32 and the base 31, the nozzle cover 22 and the bottom cover 32, and the nozzle 21 and the bottom cover 32 are fixed by welding.

Referring to fig. 3 and 4, as a specific embodiment, the liquid inlet pipe structure 1 includes a metering valve 10, the metering valve 10 is installed in a liquid inlet installation hole 327, and a liquid outlet end of the metering valve 10 is communicated with a liquid inlet end of the spray head 21; through the surrounding arrangement of the heat dissipation channel, the metering valve 10 can be effectively prevented from being burnt. Specifically, a seal ring 12 is provided between the liquid outlet end of the metering valve 10 and the liquid inlet mounting hole 327.

Referring to fig. 3 to 5, as a specific embodiment, the liquid inlet end of the metering valve 10 is connected to an SAE connector 11, at least two supporting pillars 317 are convexly arranged on the base 31, the bottom of the SAE connector 11 is connected to an installation plate 111, and the installation plate 111 is fixedly installed on the supporting pillars 317. Specifically, a sealing ring 13 is arranged between the liquid inlet end of the metering valve 10 and the SAE joint 11.

In the following, the operation of the present invention will be described in brief only by taking the specific embodiment shown in fig. 1 to 7 as an example, which is only for the convenience of understanding the present invention, and should not be construed as limiting the present invention.

When the SCR urea nozzle is in operation, the auxiliary gas enters the heat dissipation channel from the gas inlet hole 302 of the base 31, circulates in this way through the lower through groove 315 of the base 31, the sub-channel 301, the upper through groove 325 of the bottom cover 32, the sub-channel 301, and the lower through groove 315 … … of the base 31 in sequence until entering the gas channel 200 between the nozzle cap 22 and the nozzle 21 from the gas outlet hole 303 of the bottom cover 32, and then is ejected from the outlet hole 221 of the nozzle cap 22 and uniformly mixed and atomized with the liquid ejected from the ejection hole 211.

The above disclosure is only a preferred embodiment of the present invention, and the function is to facilitate the understanding and implementation of the present invention, which is not to be construed as limiting the scope of the present invention, and therefore, the present invention is not limited to the claims.

Claims

1. An SCR urea nozzle, comprising:

a liquid inlet pipe structure;

the liquid inlet end of the spray head structure is communicated with the liquid outlet end of the liquid inlet pipe structure, the spray head structure and the liquid inlet pipe structure jointly form a liquid inlet channel, and a spray hole communicated with the liquid inlet channel is formed at the liquid outlet end of the spray head structure; and

the pedestal structure, inlet tube structure and shower nozzle structure fixed mounting are in the pedestal structure is last, the structural heat dissipation channel that is winding ground that is of pedestal encircles inlet channel, heat dissipation channel's one end is connected with into the gas pocket, heat dissipation channel's the other end is connected with the venthole, gaseous via the venthole gets into the inside of shower nozzle structure and outside blowout.

2. The SCR urea nozzle of claim 1, wherein: the liquid inlet pipe structure comprises a metering valve, and the liquid outlet end of the metering valve is communicated with the liquid inlet end of the spray head structure.

3. The SCR urea nozzle of claim 1, wherein: the shower nozzle structure includes shower nozzle and shower nozzle cover, the income liquid end of shower nozzle with the play liquid end intercommunication of feed liquor tubular construction, the shower nozzle cover encircles the shower nozzle sets up, the shower nozzle cover with be formed with gas passage between the shower nozzle, the venthole with gas passage intercommunication, the shower nozzle cover be formed with the exit hole that the jet orifice corresponds.

4. The SCR urea nozzle of claim 3, wherein: the gas channel comprises a gas buffer area and a gas injection area, the gas buffer area is communicated with the gas outlet, the gas injection area is communicated between the gas buffer area and the outlet hole, and the gas injection area is gradually narrowed from one end connected with the gas buffer area to one end connected with the outlet hole.

5. The SCR urea nozzle of claim 1, wherein: the heat dissipation channel is arranged in a winding manner from top to bottom.

6. The SCR urea nozzle of claim 5, wherein: the seat body structure comprises an inner peripheral wall and an outer peripheral wall which are arranged at intervals, a bottom wall, a top wall and a plurality of radiating fins which are arranged at intervals around the inner peripheral wall, wherein the inner peripheral wall is arranged around the liquid inlet channel, the inner edges of the plurality of radiating fins are hermetically connected to the inner peripheral wall, the outer edges of the plurality of radiating fins are hermetically connected to the outer peripheral wall, a plurality of sub-channels are formed among the radiating fins, the plurality of radiating fins comprise a plurality of first radiating fins, a plurality of second radiating fins and third radiating fins, the plurality of first radiating fins and the second radiating fins are arranged in a mutually staggered manner, the lower ends of the plurality of first radiating fins are hermetically connected to the bottom wall, the upper ends of the plurality of first radiating fins are respectively provided with an upper through groove, the upper ends of the plurality of second radiating fins are hermetically connected to the, the upper end and the lower end of the third radiating fin are respectively connected to the top wall and the bottom wall in a sealing mode, the sub-channels, the upper through groove and the lower through groove are correspondingly communicated to form the radiating channels, the air inlet hole and the air outlet hole are respectively communicated to the respective sub-channels adjacent to the third radiating fin, and the air outlet hole penetrates through the bottom wall to be communicated with the interior of the sprayer structure.

7. The SCR urea nozzle of claim 6, wherein: the pedestal structure includes the base and inserts to establish and fix the bottom of base, the base include the periphery wall with the roof, it is a plurality of the second fin by the periphery wall inwards protruding establish form and its inside border with inside perisporium sealing connection, the middle part of roof is formed with the through-hole, it forms to go into the gas pocket the base, the bottom includes the inside perisporium with the diapire, it is a plurality of first fin by the inside perisporium outwards protruding establish form and its outside border with periphery wall sealing connection, the inside perisporium with the through-hole corresponds the setting.

8. The SCR urea nozzle of claim 7, wherein: the upper end of the inner peripheral wall is inserted into the through hole in a matching mode.

9. The SCR urea nozzle of claim 7, wherein: the bottom of the bottom cover is provided with a flange in an outward protruding mode, and the flange is attached to the bottom face of the base.

10. The SCR urea nozzle of claim 7, wherein: the bottom still includes the mounting hole that runs through from top to bottom that is located the middle part, shower nozzle structrual installation in the mounting hole, shower nozzle structrual installation in the lower part of mounting hole, the feed liquor tubular construction install the upper portion of mounting hole.