CN114060126B - Urea metering and spraying device - Google Patents
Urea metering and spraying device Download PDFInfo
- Publication number
- CN114060126B CN114060126B CN202111313578.9A CN202111313578A CN114060126B CN 114060126 B CN114060126 B CN 114060126B CN 202111313578 A CN202111313578 A CN 202111313578A CN 114060126 B CN114060126 B CN 114060126B
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- Prior art keywords
- annular
- cooling
- water jacket
- cooling water
- wall
- Prior art date
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000004202 carbamide Substances 0.000 title claims abstract description 53
- 238000005507 spraying Methods 0.000 title claims abstract description 52
- 238000007789 sealing Methods 0.000 claims abstract description 61
- 238000001816 cooling Methods 0.000 claims abstract description 57
- 239000000498 cooling water Substances 0.000 claims abstract description 55
- 238000002347 injection Methods 0.000 claims abstract description 40
- 239000007924 injection Substances 0.000 claims abstract description 40
- 239000000110 cooling liquid Substances 0.000 claims abstract description 23
- 239000000243 solution Substances 0.000 claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 239000002826 coolant Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 10
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 239000012809 cooling fluid Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/12—Arrangements for cooling other engine or machine parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to the technical field of internal combustion engine tail gas aftertreatment, and discloses a urea metering and spraying device which comprises a cooling assembly, a nozzle assembly and a mounting assembly. The cooling assembly includes an annular cooling water jacket having a cooling inner wall and a cooling outer wall that form an annular cooling cavity to receive a cooling fluid. The nozzle assembly is used for spraying urea solution and comprises a spraying part and a sealing part, the sealing part comprises an annular sealing sleeve, the spraying part is arranged in the annular cooling water jacket in a penetrating mode, the middle section of the spraying part is arranged on the cooling inner wall in a propping mode through the annular sealing sleeve, the annular cooling water jacket can well wrap the spraying part, cooling liquid heat exchange is enabled to be full, cooling efficiency of the annular cooling water jacket is improved, and normal operation of the spraying part is guaranteed. The part of the injection part extending out of the annular cooling water jacket is relatively fixed with the installation component, the installation component comprises an installation seat, the annular cooling water jacket is inserted into the installation seat and is connected with the exhaust pipeline through the installation seat, and the assembly and the disassembly are more convenient.
Description
Technical Field
The invention relates to the technical field of internal combustion engine tail gas aftertreatment, in particular to a urea metering and jetting device.
Background
In order to make the diesel engine automobile meet the national emission regulation requirement, the aftertreatment system adopts a selective catalytic reduction system SCR to remove NO X contained in the tail gas, generally injects 32.5% urea solution into an exhaust pipe, hydrolyzes and pyrolyzes to form ammonia gas, and then catalytically reduces NO X into harmless nitrogen and water through a catalytic carrier.
The urea injection device is arranged on the exhaust pipe, the temperature of the exhaust pipe is higher, the urea injection device is usually in a high-temperature use environment, the urea solution is easy to crystallize at high temperature, the nozzle is blocked, the catalytic reaction cannot be completed, the exhaust emission exceeds the standard, and the engine can be damaged even under severe conditions. In addition, urea injection device structure is accurate, and machining precision is high, and spare part cooperation is accurate, if under high temperature environment, leads to the device fault rate to increase, has also increased equipment cost to a certain extent.
Therefore, a urea metering injection device is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a urea metering and spraying device, which solves the problems of nozzle blockage, spraying device and engine faults caused by overhigh ambient temperature in the using process.
The technical scheme adopted by the invention is as follows:
A urea metering injection apparatus comprising:
the cooling assembly comprises an annular cooling water jacket, wherein the annular cooling water jacket comprises a cooling inner wall and a cooling outer wall, and the cooling inner wall and the cooling outer wall form an annular cooling cavity;
the spray nozzle assembly is used for spraying urea solution and comprises a spray part and a sealing part, the sealing part comprises an annular sealing sleeve, one end of the spray part penetrates through the annular cooling water jacket, the middle section of the spray part is abutted against the cooling inner wall through the annular sealing sleeve, and the other end of the spray part extends out of the annular cooling water jacket;
The mounting assembly comprises a top cover, a clamping sleeve and a mounting seat, wherein the top cover is propped against the other end of the spraying part, the top cover is connected with the annular cooling water jacket through the clamping sleeve, the mounting seat is of an annular structure, the annular cooling water jacket is inserted into the mounting seat, and the urea metering and spraying device is connected with an exhaust pipeline through the mounting seat.
Optionally, the cross section of the annular sealing sleeve perpendicular to the axial direction of the annular sealing sleeve is concave, the spraying part is provided with a stepped surface, one end of the spraying part is inserted into the annular sealing sleeve, the end face of the annular sealing sleeve is abutted to the stepped surface, and the outer wall surface of the annular sealing sleeve is abutted to the cooling inner wall.
Optionally, the installation component still includes the staple bolt flange, the outer wall of mount pad is equipped with the installation step, the staple bolt flange can be used for fixing the mount pad with exhaust duct, just the staple bolt flange can support tightly in the installation step sets up.
Optionally, the mounting assembly further comprises a sealing gasket, and the sealing gasket can be clamped between the mounting seat and the exhaust pipeline.
Optionally, the sealing part further comprises a sealing ring, and the sealing ring is clamped between the other end of the spraying part and the top cover.
Optionally, the cutting ferrule with annular cooling water jacket spiro union, the top cap with cutting ferrule welded connection.
Optionally, a urea liquid inlet connector is arranged on the top cover, and the urea liquid inlet connector is communicated with the spraying part.
Optionally, the nozzle assembly further comprises a harness plug electrically connected to the spraying portion.
Optionally, the cooling assembly further comprises a coolant connector inserted into the cooling outer wall, the coolant connector comprising an inlet coolant connector and an outlet coolant connector capable of communicating with the annular cooling cavity.
Optionally, the cooling liquid joint is welded with the annular cooling water jacket; or (b)
The cooling liquid connector is connected with the annular cooling water jacket in an inserting mode.
The beneficial effects of the invention are as follows:
The urea metering and spraying device comprises a cooling assembly, a nozzle assembly and a mounting assembly. The cooling assembly includes an annular cooling water jacket having a cooling inner wall and a cooling outer wall that form an annular cooling cavity to receive a cooling fluid. The nozzle assembly is used for spraying urea solution and comprises a spraying part and a sealing part, the sealing part comprises an annular sealing sleeve, one end of the spraying part is arranged in the annular cooling water jacket in a penetrating mode, the middle section of the spraying part is arranged in a propping mode through the annular sealing sleeve, the other end of the spraying part extends out of the annular cooling water jacket to be relatively fixed with the mounting assembly, under the arrangement, the annular cooling water jacket can achieve good wrapping of the nozzle assembly, cooling liquid in the annular cooling cavity is enabled to be fully subjected to heat exchange, cooling efficiency of the annular cooling water jacket is improved, and normal operation of the nozzle assembly is guaranteed. In addition, the installation component includes top cap, cutting ferrule and mount pad, and specifically, the top cap supports the other end setting of pressing the injection part, and connects in annular cooling water jacket through the cutting ferrule, and annular cooling water jacket is then inserted and is located in the mount pad that is also annular structure for urea measurement injection apparatus accessible this mount pad is connected in exhaust duct, easy dismounting.
Drawings
FIG. 1 is a cross-sectional view of a urea metering injection apparatus provided by an embodiment of the present invention.
In the figure:
1. A nozzle assembly; 2. an annular cooling water jacket; 3. a mounting base; 31. mounting steps; 4. a top cover; 5. a cutting sleeve; 6. a coolant joint; 7. urea liquid inlet joint; 8. a harness plug; 9. a seal ring; 10. sealing sleeve; 11. and a sealing gasket.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
In order to solve the problems that in the high-temperature environment, the urea solution is easy to crystallize in the spraying process to block the nozzle, so that the catalytic reaction is blocked and the failure rate of the spraying device is increased, the embodiment provides the urea metering and spraying device, which is provided with a cooling component capable of completely wrapping the urea nozzle, so that the urea nozzle is reduced from being influenced by the temperature of an exhaust pipeline, the urea crystallization phenomenon of the urea nozzle part is improved, and the service life of the urea metering and spraying device is prolonged.
As shown in fig. 1, the urea metering and spraying device provided in this embodiment includes a cooling component, a mounting component and a nozzle component 1 for spraying urea solution, where the nozzle component 1 mainly includes two parts, namely a spraying part and a sealing part, the urea solution can enter the spraying part and be sprayed into an exhaust pipeline through the spraying part, so as to implement catalytic reduction reaction on exhaust gas in the exhaust pipeline, and the sealing part has the function of ensuring that the spraying part and the cooling component are stably assembled, and secondly, ensuring that the urea solution cannot leak in the process of entering the spraying part. Specifically, the cooling assembly includes an annular cooling water jacket 2 having a cooling inner wall and a cooling outer wall, which form an annular cooling cavity through the cooling inner wall and the cooling outer wall, and it is understood that the cooling liquid may be stored in the annular cooling cavity, and the injection portion is disposed in the annular cooling water jacket 2, so that a good cooling effect of the cooling liquid on the injection portion may be ensured.
In order to ensure the liquid inlet and cooling of the injection part, one end of the injection part is arranged in the annular cooling water jacket 2 in a penetrating way, and the other end extends out of the annular cooling water jacket 2. The sealing part comprises an annular sealing sleeve 10, and the annular sealing sleeve 10 is sleeved on the spraying part, so that the interruption of the spraying part can be abutted with the cooling inner wall through the annular sealing sleeve 10. The relative fixation of one end of the injection part and the annular cooling water jacket 2 can be realized through the cooperation of one end of the injection part and the annular cooling water jacket 2 and the cooperation of the other end of the injection part and the mounting assembly.
In this embodiment, the cross section of the annular sealing sleeve 10 perpendicular to the axial direction is concave, that is, the annular sealing sleeve 10 has a mounting cavity, when the injection part passes through the annular sealing sleeve 10, the middle part of the injection part is located in the mounting cavity and matched with the mounting cavity, the injection part is provided with a stepped surface, when the injection part passes through the annular sealing sleeve 10, the end surface of the annular sealing sleeve 10 abuts against the stepped surface to limit the injection part by the annular sealing sleeve 10, and the outer wall surface of the annular sealing sleeve 10 abuts against the cooling inner wall to limit the annular sealing sleeve 10 by the annular cooling water jacket 2, under the arrangement, when the other end of the injection part is relatively fixed by the mounting component, the middle section of the injection part abuts against the annular cooling water jacket 2 by the annular sealing sleeve 10.
With continued reference to fig. 1, the mounting assembly includes a top cover 4 and a ferrule 5, wherein the top cover 4 is disposed against the other end of the injection portion and is connected to the annular cooling water jacket 2 through the ferrule 5, and under this arrangement, the top cover 4, the ferrule 5 and the annular cooling water jacket 2 can be relatively fixed, and the nozzle assembly 1 penetrating through the annular cooling water jacket 2 is also relatively fixed therewith. The mounting assembly further comprises a mounting seat 3, the mounting seat 3 is of an annular structure, and the annular cooling water jacket 2 is inserted into the mounting seat 3, so that the urea metering and spraying device can be connected to an exhaust pipeline (not shown in the figure) through the mounting seat 3.
In addition, the installation component still includes the staple bolt flange (not shown in the figure), and the staple bolt flange can be used for fixed mount pad 3 and exhaust duct, when fixed exhaust duct and mount pad 3, can locate mount pad 3 and exhaust duct periphery with the staple bolt flange ring and utilize the fastener to fix. And the outer wall of mount pad 3 is equipped with mounting step 31, and when the staple bolt flange was fixed in on mount pad 3 and the exhaust duct, then the staple bolt flange will butt set up in mounting step 31 to avoid the staple bolt flange to follow the axial direction of mount pad 3 and remove, with the staple bolt flange card locate between mounting step 31 and the terminal surface that has the exhaust duct.
The mounting seat 3 is also provided with an annular groove, namely, when the mounting seat 3 is fixed relative to the exhaust pipeline, the side wall of the exhaust pipeline is positioned in the annular groove, so that the urea solution can be completely sprayed into the exhaust pipeline. In order to ensure the tightness of the exhaust pipeline and avoid leakage of exhaust gas from the contact surface of the exhaust pipeline and the annular groove, the mounting assembly further comprises a sealing gasket 11, and the sealing gasket 11 can be clamped between the mounting seat 3 and the exhaust pipeline, namely, the sealing gasket is arranged in the annular groove.
Optionally, the top cover 4 is provided with a urea liquid inlet connector 7, the urea liquid inlet connector 7 can be communicated with the spraying part, referring to fig. 1, the top cover 4 is provided with a cavity with a downward opening, the other end of the spraying part can extend into the cavity, the other end of the spraying part is provided with an interface for allowing urea solution to enter, and when the spraying part and the top cover 4 are installed in place, the urea solution can enter the spraying part through the urea liquid inlet connector 7. Optionally, the spraying part comprises a nozzle positioned on one end of the spraying part, the nozzle can be penetrated in the exhaust pipeline, and the urea solution can be sprayed into the exhaust pipeline by using the nozzle.
Further, the sealing part further comprises a sealing ring 9, the sealing ring 9 is sleeved on the outer peripheral surface of the other end of the injection part, and when the top cover 4 is connected to the annular cooling water jacket 2 through the clamping sleeve 5, the sealing ring 9 is clamped between the other end of the injection part and the top cover 4, so that urea solution leakage is avoided.
Further, the cutting ferrule 5 is connected with the annular cooling water jacket 2 in a threaded manner, and the top cover 4 is connected with the cutting ferrule 5 in a welded manner. Namely, during assembly, the injection part sleeved with the annular sealing sleeve 10 can be firstly penetrated into the annular cooling water jacket 2, the clamping sleeve 5 corresponds to the annular cooling water jacket 2, the annular cooling water jacket 2 is screwed on the clamping sleeve 5, and then the top cover 4 is welded with the clamping sleeve 5. Alternatively, the mount 3 is welded to the annular cooling water jacket 2.
Optionally, the nozzle assembly 1 further includes a harness plug 8, where the harness plug 8 is electrically connected to the injection part to control the injection action of the nozzle, and when the annular cooling water jacket 2 is screwed with the ferrule 5 into a whole, a relief opening should be provided on a side wall of the whole, so that the harness plug 8 is exposed outside the annular cooling water jacket 2 and the ferrule 5, and therefore, when the ferrule 5 is assembled on the annular cooling water jacket 2, the positions of the injection part and the cooling assembly are relatively fixed.
Optionally, the cooling assembly further comprises a cooling liquid joint 6, the cooling liquid joint 6 is inserted in the cooling outer wall, the cooling liquid joint 6 comprises an inlet cooling liquid joint capable of communicating with the annular cooling cavity and an outlet cooling liquid joint, namely, cooling liquid enters the annular cooling cavity through the inlet cooling liquid joint and then flows out of the outlet cooling liquid joint.
Alternatively, the coolant joint 6 is welded to the annular cooling jacket 2. In other embodiments, the coolant connection 6 can also be connected to the annular cooling jacket 2 in a plug-in manner. One end of the cooling liquid joint 6, which is not connected with the annular cooling water jacket 2, is communicated with a cooling liquid pipeline of the vehicle, and when the urea metering and spraying device works, cooling liquid forms a loop in the annular cooling water jacket 2 and can also conduct the temperature of the exhaust pipe to the mounting seat 3 to be taken away, so that the spraying part is cooled.
The above embodiments merely illustrate the basic principle and features of the present invention, and the present invention is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A urea metering injection apparatus, comprising:
The cooling assembly comprises an annular cooling water jacket (2), wherein the annular cooling water jacket (2) comprises a cooling inner wall and a cooling outer wall, and the cooling inner wall and the cooling outer wall form an annular cooling cavity;
The spray nozzle assembly (1) is used for spraying urea solution, the spray nozzle assembly (1) comprises a spray part and a sealing part, the sealing part comprises an annular sealing sleeve (10), one end of the spray part is arranged in the annular cooling water jacket (2) in a penetrating manner, the middle section of the spray part is arranged in a manner of being abutted against the cooling inner wall through the annular sealing sleeve (10), and the other end of the spray part extends out of the annular cooling water jacket (2);
The mounting assembly comprises a top cover (4), a clamping sleeve (5) and a mounting seat (3), wherein the top cover (4) is propped against the other end of the spraying part and is connected with the annular cooling water jacket (2) through the clamping sleeve (5), the mounting seat (3) is of an annular structure, the annular cooling water jacket (2) is inserted into the mounting seat (3), and the urea metering and spraying device is connected to an exhaust pipeline through the mounting seat (3);
The cross section of the annular sealing sleeve (10) perpendicular to the axial direction of the annular sealing sleeve is concave, a stepped surface is arranged on the injection part, one end of the injection part is inserted into the annular sealing sleeve (10), the end surface of the annular sealing sleeve (10) is abutted against the stepped surface, and the outer wall surface of the annular sealing sleeve (10) is abutted against the cooling inner wall;
the mounting assembly further comprises a hoop flange, the outer wall of the mounting seat (3) is provided with a mounting step (31), the hoop flange can be used for fixing the mounting seat (3) and the exhaust pipeline, and the hoop flange can be abutted against the mounting step (31);
The top cover (4) is provided with a urea liquid inlet connector (7), and the urea liquid inlet connector (7) is communicated with the spraying part;
the cooling assembly further comprises a cooling liquid joint (6), the cooling liquid joint (6) is inserted into the cooling outer wall, and the cooling liquid joint (6) comprises an inlet cooling liquid joint and an outlet cooling liquid joint which can be communicated with the annular cooling cavity.
2. Urea metering injection device according to claim 1, characterized in that the mounting assembly further comprises a sealing gasket (11), which sealing gasket (11) can be clamped between the mounting seat (3) and the exhaust duct.
3. Urea metering injection device according to claim 1, characterized in that the sealing section further comprises a sealing ring (9), the sealing ring (9) being sandwiched between the other end of the injection section and the top cap (4).
4. Urea metering injection device according to claim 1, characterized in that the ferrule (5) is screw-connected with the annular cooling water jacket (2), and the top cover (4) is welded with the ferrule (5).
5. Urea metering injection device according to claim 1, characterized in that the nozzle assembly (1) further comprises a harness plug (8), the harness plug (8) being electrically connected to the injection section.
6. Urea metering injection device according to claim 1, characterized in that the coolant joint (6) is welded with the annular cooling water jacket (2); or (b)
The cooling liquid joint (6) is connected with the annular cooling water jacket (2) in a plugging manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313578.9A CN114060126B (en) | 2021-11-08 | 2021-11-08 | Urea metering and spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313578.9A CN114060126B (en) | 2021-11-08 | 2021-11-08 | Urea metering and spraying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114060126A CN114060126A (en) | 2022-02-18 |
| CN114060126B true CN114060126B (en) | 2024-06-21 |
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ID=80274691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111313578.9A Active CN114060126B (en) | 2021-11-08 | 2021-11-08 | Urea metering and spraying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114060126B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217107164U (en) * | 2021-11-08 | 2022-08-02 | 凯龙高科技股份有限公司 | Urea metering and spraying device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT413130B (en) * | 2003-09-23 | 2005-11-15 | Ge Jenbacher Ag | Internal combustion engine |
| EP1840351B1 (en) * | 2006-03-29 | 2010-02-24 | Honda Motor Co., Ltd. | Water-cooled internal combustion engine |
| CN204402628U (en) * | 2014-10-22 | 2015-06-17 | 张家口百通环保科技有限公司 | A kind of circulating water cooling type urea injection device for SCR exhaust gas aftertreatment system |
| CN104948277B (en) * | 2015-06-30 | 2018-05-04 | 苏州派格丽减排系统有限公司 | A kind of air-free pump water-cooled nozzle |
| CN206129370U (en) * | 2016-09-14 | 2017-04-26 | 无锡威孚高科技集团股份有限公司 | Nozzle coolant jacket structure |
| CN107701271A (en) * | 2017-10-31 | 2018-02-16 | 凯龙高科技股份有限公司 | A kind of metering injector of the spliced cooling jacket of band |
| CN213116434U (en) * | 2020-04-25 | 2021-05-04 | 福爱电子(贵州)有限公司 | Novel post-treatment nozzle cooling device |
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2021
- 2021-11-08 CN CN202111313578.9A patent/CN114060126B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN217107164U (en) * | 2021-11-08 | 2022-08-02 | 凯龙高科技股份有限公司 | Urea metering and spraying device |
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| CN114060126A (en) | 2022-02-18 |
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