CN214836642U - SCR urea supersonic speed jet atomization injection assembly - Google Patents
SCR urea supersonic speed jet atomization injection assembly Download PDFInfo
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- CN214836642U CN214836642U CN202120884702.6U CN202120884702U CN214836642U CN 214836642 U CN214836642 U CN 214836642U CN 202120884702 U CN202120884702 U CN 202120884702U CN 214836642 U CN214836642 U CN 214836642U
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Abstract
The utility model discloses a SCR urea supersonic speed efflux atomizing sprays assembly, include: a first-stage injection mechanism and a second-stage injection mechanism; the first-stage injection mechanism and the second-stage injection mechanism are connected into a small whole through a gas-liquid mixing block; the gas-liquid mixing block is provided with a mixing cavity and a circulating gas access part, the injection end of the primary injection mechanism is communicated to the mixing cavity and used for injecting urea and is primarily mixed with circulating gas to form mixed flow, and the inlet of the secondary injection mechanism is communicated to the mixing cavity and used for spraying out the mixed flow. The utility model discloses a form preliminary atomizing when one-level injection mechanism sprays urea to the hybrid chamber to mix the back with the circulation gas that inserts the hybrid chamber, form atomizing once more from the blowout of second grade injection mechanism again, atomization effect is good, and the heat of one-level injection mechanism and second grade injection mechanism and gas-liquid mixture piece can be taken away rapidly to the air current of atomizing urea and circulation, reaches rapid cooling's purpose, effectively prolongs one-level injection mechanism and second grade injection mechanism's life.
Description
Technical Field
The utility model relates to a tail gas aftertreatment system technical field, more specifically say, the utility model relates to a SCR urea supersonic speed efflux atomizing sprays assembly.
Background
Urea sprayer is the very critical part of engine exhaust treatment system, and it is arranged in spraying the urea solution of urea pump supply to the engine exhaust pipe in with tail gas reaction, and current urea sprayer is mostly single-stage structure, and the urea of injection is inhomogeneous, leads to urea can't react with the tail gas is abundant fast, and the tail gas treatment effect is not good. And the urea sprayer bears the easy damage of the stoving of high temperature tail gas, and current equipment only sets up cooling module to urea sprayer cooling usually, and urea sprayer and cooling module contact, and the heat is taken away by cooling module, reaches the purpose of cooling. However, the structure depends on heat transfer to dissipate heat, and the cooling effect is still not ideal enough, so that the improvement is needed.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to address at least the above-mentioned deficiencies and to provide at least the advantages which will be explained later.
Another object of the utility model is to provide a SCR urea supersonic speed efflux atomizing sprays assembly, this assembly utilizes the gas-liquid mixing piece that has the hybrid chamber to link into little whole with one-level injection mechanism and second grade injection structure, form preliminary atomizing when one-level injection mechanism sprays urea to the hybrid chamber, and mix the back with the circulation gas that inserts the hybrid chamber, form secondary atomization from the blowout of second grade injection mechanism again, improve atomization effect, and the air current of atomizing urea and circulation can take away the heat of one-level injection mechanism and second grade injection mechanism and gas-liquid mixing piece rapidly, reach rapid cooling's purpose, effectively prolong the life of one-level injection mechanism and second grade injection mechanism.
In order to solve the technical problem, the utility model provides a following technical scheme:
an SCR urea supersonic jet atomizing injection assembly, comprising: a first-stage injection mechanism and a second-stage injection mechanism;
wherein, the first-stage injection mechanism and the second-stage injection mechanism are connected into a small whole through a gas-liquid mixing block; the gas-liquid mixing piece is provided with the hybrid chamber and is provided with circulation gas access portion, and the injection end of one-level injection mechanism communicates to the hybrid chamber and is used for spouting into urea formation preliminary atomization and just mixes with circulation gas and form the mixing flow, and the entry of second grade injection mechanism communicates to the hybrid chamber and is used for spouting the mixing flow and form atomizing once more, and not only the even effectual of atomized particles, and utilize the fluid fast flow to take away the heat and rapid cooling.
Among the above-mentioned technical scheme, the utilization has the gas-liquid mixing piece of hybrid chamber to link into little whole with one-level injection mechanism and second grade injection structure, form preliminary atomizing when one-level injection mechanism sprays urea to the hybrid chamber, and form the mixed flow after mixing with the circulation gas that inserts the hybrid chamber, form atomizing once more from the high-speed blowout of second grade injection mechanism, improve the atomizing degree of consistency and atomization effect, and the air current of atomizing urea and circulation can take away the heat of one-level injection mechanism and second grade injection mechanism and gas-liquid mixing piece rapidly, reach rapid cooling's purpose, effectively prolong the life of one-level injection mechanism and second grade injection mechanism.
Compare traditional single urea injection valve, urea is very slow at inside circulation speed, relies on the fluid to take away the heat unrealistic, consequently sets up the hybrid chamber and atomizes urea preliminary, and rethread atomizing injection valve sprays at a high speed, and the flow is big, and the velocity of flow is high, therefore takes away the heat effect fine.
The first-stage injection mechanism, the second-stage injection mechanism and the gas-liquid mixing block are preferably arranged to be good thermal conductors.
Preferably, the SCR urea supersonic jet atomizing and spraying assembly further comprises a heat conductor, a cooling assembly is arranged in the heat conductor, circulating cooling liquid is introduced into the cooling assembly, and the primary injection mechanism, the secondary injection mechanism, the gas-liquid mixing block and the heat conductor are connected to form a large whole, so that heat is conducted to the heat conductor and is taken away by the cooling assembly.
Among the above-mentioned technical scheme, little whole and heat conductor are connected and are formed big whole, and outside the heat that the treatment fluid sprays to take away, all the other heat transfer to the heat conductor and then taken away by cooling module, the combination of two kinds of radiating modes brings better cooling effect.
Preferably, in the SCR urea supersonic jet atomizing injection assembly, the injection port of the primary injection mechanism and the inlet of the secondary injection mechanism are both located in the mixing chamber.
Among the above-mentioned technical scheme, preliminary atomizing not only atomizes evenly effectually in the mixing chamber, and atomizes and takes away the heat.
Preferably, in the SCR urea supersonic jet atomizing injection assembly, the primary injection mechanism and the secondary injection mechanism are coaxially arranged, or axially arranged in parallel, or axially arranged in a cross manner, or axially arranged in a spatial cross manner.
In the above technical scheme, the arrangement mode of the first-stage injection mechanism and the second-stage injection mechanism has various forms as long as the first-stage injection mechanism and the second-stage injection mechanism are connected to the mixing cavity.
Preferably, the SCR urea supersonic speed jet atomizing injection assembly further comprises an installation column, and the gas-liquid mixing block is installed on the installation column.
Preferably, the SCR urea supersonic jet atomizing injection assembly further comprises a mounting seat for connecting to an engine exhaust pipe, and the mounting column and the heat conductor are arranged on the mounting seat.
Preferably, in the SCR urea supersonic jet atomizing injection assembly, the gas-liquid mixing block is a good thermal conductor.
Preferably, in the SCR urea supersonic jet atomizing injection assembly, the primary injection mechanism is a urea metering valve, and the secondary injection mechanism is a urea atomizing injection valve.
Preferably, in the SCR urea supersonic jet atomization injection assembly, an oil cap is mounted and connected to the gas-liquid mixing block, and the oil cap is in sealing connection with the urea metering valve and is used for extending urea into the urea metering valve.
The utility model discloses at least, include following beneficial effect:
in the assembly of the utility model, cooling water circulates in the cooling water component, thus fully reducing the temperature of each part in the urea supersonic jet atomization injection assembly; the oil cap is connected with the urea metering valve, and the circulating urea has a cooling effect on the urea metering valve; the gas-liquid mixing block is internally provided with a gas-liquid mixing cavity, urea and gas are fully mixed in the gas-liquid mixing cavity, and the circulating gas with certain pressure can accelerate the urea, so that good preliminary atomization can be formed in the gas-liquid mixing cavity, preparation conditions are provided for next supersonic jet atomization, and meanwhile, the circulating gas is utilized to play a cooling effect on a urea metering valve, the gas-liquid mixing block and a urea atomization injection valve, so that the service life of the injection device in a high-temperature environment of the exhaust pipe is effectively prolonged, and the problems that the urea is difficult to atomize and is not uniform in atomization are solved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of a three-dimensional structure of the SCR urea supersonic jet atomizing injection assembly of the present invention;
FIG. 2 is a vertical cross-sectional view of the SCR urea supersonic jet atomizing spray assembly of the present invention;
fig. 3 is a schematic sectional view of the cold water assembly of the present invention.
In the figure: the device comprises a cooling water assembly 1, a mounting column 2, a heat conductor 3, a mounting seat 4, a gas joint 5, an oil cap 6, a urea metering valve 7, a gas-liquid mixing block 8, a urea atomizing injection valve 9, a gas-liquid mixing cavity 10 and a flow channel 101.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can implement the invention with reference to the description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
FIGS. 1 and 2 illustrate one embodiment of an SCR urea supersonic jet atomizing injection assembly, comprising: a first-stage injection mechanism and a second-stage injection mechanism; in the present embodiment, the primary injection mechanism is a urea metering valve 7, and the secondary injection mechanism is a urea atomizing injection valve 9.
Wherein, the first-stage injection mechanism and the second-stage injection mechanism are connected into a small whole through a gas-liquid mixing block 8; the gas-liquid mixing block 8 is provided with a mixing cavity 10 and a circulating gas access part, the fluid gas access part is set as a gas joint 5 in the embodiment, the injection end of the primary injection mechanism is communicated to the mixing cavity 10 and is used for injecting urea to form atomization and is primarily mixed with the circulating gas to form mixed flow, and the inlet of the secondary injection mechanism is communicated to the mixing cavity 10 and is used for injecting the mixed flow to take away heat and cool. In this illustration, the first-stage injection mechanism and the second-stage injection mechanism are end-connected, but not limited to end-connection, and may be cross-connected in the axial direction, or arranged in parallel in the axial direction, and the shape of the gas-liquid mixing block is adapted to the relative position of the first-stage injection mechanism and the second-stage injection mechanism, so as to construct a mixing chamber for the nozzles and inlets of the first-stage injection mechanism and the second-stage injection mechanism.
Accordingly, the shape of the mixing chamber 10 is not limited to the shape defined in the drawings, and the injected urea and the flow gas may be mixed. The first-level injection mechanism and the second-level injection mechanism in the legend are connected in a terminating mode, the mixing cavity is narrow and flat, rapid atomization and spraying of urea are facilitated, corresponding spraying speed is improved, meanwhile, the structure is more compact, and the size of an assembly is favorably reduced.
This embodiment utilizes the gas-liquid mixture piece 8 that has the hybrid chamber to link into little whole with one-level injection mechanism and second grade injection structure, form preliminary atomizing when one-level injection mechanism sprays urea to the hybrid chamber, and form the fluid mixture after mixing with the circulation gas that inserts the hybrid chamber, form atomizing once more from second grade injection mechanism blowout again, improve the atomizing degree of consistency, improve atomization effect, the heat of one-level injection mechanism and second grade injection mechanism and gas-liquid mixture piece can be taken away rapidly to atomizing urea and the air current of circulation, reach rapid cooling's purpose, prevent effectively that injection mechanism from being destroyed by high temperature, prolong the life of one-level injection mechanism and second grade injection mechanism.
In order to improve the heat dissipation effect, the first-stage injection mechanism, the second-stage injection mechanism and the gas-liquid mixing block are preferably set to be good thermal conductors.
Further, as shown in fig. 1 to 3, in another embodiment, the heat conduction device further includes a heat conductor 3, the heat conductor 3 is provided with a cooling assembly 1, the cooling assembly 1 is filled with a circulating cooling liquid, and the primary injection mechanism, the secondary injection mechanism, the gas-liquid mixing block 8 and the heat conductor 3 are connected to form a large whole so that heat is conducted to the heat conductor and taken away by the cooling assembly 1. More specifically, the cooling assembly includes a water inlet, a water outlet, and a flow channel 101 disposed inside the heat conductor, and the cooling liquid circulates along the flow channel 101 to achieve the purpose of heat dissipation.
In this embodiment, little whole and heat conductor 3 are connected and are formed big whole, except the heat that the fluid was taken away, all the other heat transfer to heat conductor 3 and then taken away by cooling module 1, and the combination of two kinds of radiating modes brings better cooling effect.
Further, in another embodiment, the injection port of the primary injection mechanism and the inlet of the secondary injection mechanism are both located in the mixing chamber. As shown in fig. 2, the injection port of the urea metering valve 1 and the inlet port of the urea atomizing injection valve 9 are both located in the mixing chamber 10.
Further, in another embodiment, the primary injection mechanism and the secondary injection mechanism are coaxially arranged or are not coaxially crossed. In the configuration shown in fig. 2, the primary injection mechanism and the secondary injection mechanism are coaxially arranged at a small distance, and the injection port of the primary injection mechanism is aligned with the inlet of the secondary injection mechanism.
However, the assembly may be formed in various shapes as needed, and in this case, the primary injection mechanism and the secondary injection mechanism may be coaxially disposed, may be axially disposed in parallel, may be axially disposed in a crossed manner, may be axially disposed in a parallel manner, or may be axially disposed in a crossed manner, as long as the injection port of the primary injection mechanism and the inlet of the secondary injection mechanism are communicated with the mixing chamber 10.
Further, as shown in fig. 1 and 2, in another embodiment, the gas-liquid mixing device further comprises a mounting column 2, and the gas-liquid mixing block 8 is mounted on the mounting column 2.
Further, in another embodiment, a mounting seat 4 for connecting to an engine exhaust pipe is further included, and the mounting post 2 and the heat conductor 3 are both disposed on the mounting seat 4.
Further, as shown in fig. 2, in another embodiment, the primary injection mechanism is specifically a urea metering valve 7, and the secondary injection mechanism is a urea atomizing injection valve 9.
Further, as shown in fig. 1 and 2, in another embodiment, an oil cap 6 is mounted and connected to the gas-liquid mixing block 8, and the oil cap 6 is hermetically connected with the urea metering valve 7 for extending urea into the urea metering valve.
The utility model discloses an implementation as follows: as shown in fig. 1 to 3, a cooling water assembly 1 is connected with circulating cooling water, the cooling water assembly 1 is located inside a heat conductor 3, the cooling water enters the heat conductor 3 from the cooling water assembly 1, a urea metering valve 7, a gas-liquid mixing block 8 and a urea atomization injection valve 9 are connected with the heat conductor 3 to form a whole, the cooling water has a cooling effect on the urea metering valve 7, the gas-liquid mixing block 8 and the urea atomization injection valve 9 in the circulating process, an oil cap 6 is installed on the gas-liquid mixing block 8, the gas-liquid mixing block 8 is installed on an installation column 2, a gas joint 5 is introduced into a gas-liquid mixing cavity 10 of the gas-liquid mixing block 8, the oil cap 6 and the '7' urea metering valve 7 form a seal and input urea into the urea metering valve 7, the gas-liquid mixing cavity 10 is arranged in the gas-liquid mixing block 8, the gas-liquid mixing block 8 connects the urea metering valve 7 and the urea atomization injection valve 9 together, the injection orifice of the urea metering valve 7 and the inlet of the urea atomizing valve 9 are both positioned in the closed gas-liquid mixing cavity 10, urea and compressed air are mixed to form good preliminary atomization, and after the urea is sprayed out of the urea atomizing valve 9, fluid takes away a large amount of heat to form good cooling, and the mounting seat 4 is used for being connected with an exhaust pipe of an engine.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art.
Claims (9)
- SCR urea supersonic speed efflux atomizing injection assembly, its characterized in that includes: a first-stage injection mechanism and a second-stage injection mechanism;wherein, the first-stage injection mechanism and the second-stage injection mechanism are connected into a small whole through a gas-liquid mixing block; the gas-liquid mixing piece is provided with the hybrid chamber, and is provided with circulation gas access portion and inputs gas to the hybrid chamber, and one-level injection mechanism's injection end communicates to the hybrid chamber and is used for spouting into the preliminary atomizing and mixes the stream of urea formation, and two-level injection mechanism's entry communicates to the hybrid chamber and is used for spouting the preliminary atomizing and mix the stream and form atomizing once more in order to improve atomization effect and take away the heat.
- 2. The SCR urea supersonic jet atomizing spray assembly of claim 1, further comprising a heat conductor, wherein a cooling assembly is disposed inside the heat conductor, the cooling assembly is filled with a circulating cooling fluid, and the primary injection mechanism, the secondary injection mechanism, and the gas-liquid mixing block are connected with the heat conductor to form a large whole, so that heat is conducted to the heat conductor and is taken away by the cooling assembly.
- 3. The SCR urea supersonic jet atomizing injection assembly of claim 1, wherein the injection port of the primary injection mechanism and the inlet of the secondary injection mechanism are both located within the mixing chamber.
- 4. The SCR urea supersonic jet atomizing injection assembly of claim 3, wherein the primary injection mechanism and the secondary injection mechanism are coaxially arranged, axially arranged in parallel, axially arranged in a cross manner, or axially arranged in a spatial cross manner.
- 5. The SCR urea supersonic jet atomizing injection assembly of claim 1, further comprising a mounting post, the gas-liquid mixing block being mounted on the mounting post.
- 6. The SCR urea supersonic jet atomizing injection assembly of claim 5, further comprising a mount for connection to an exhaust pipe of an engine, the mounting post and the heat conductor both being disposed on the mount.
- 7. The SCR urea supersonic jet atomizing injection assembly of claim 1, wherein the gas-liquid mixing block is a good conductor of heat.
- 8. The SCR urea supersonic jet atomizing injection assembly of claim 1, wherein the primary injection mechanism is a urea metering valve and the secondary injection mechanism is a urea atomizing injection valve.
- 9. The SCR urea supersonic jet atomizing injection assembly of claim 8, wherein an oil cap is mounted and connected to the gas-liquid mixing block, and the oil cap is in sealing connection with the urea metering valve and is used for extending urea into the urea metering valve.
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| CN202120884702.6U CN214836642U (en) | 2021-04-27 | 2021-04-27 | SCR urea supersonic speed jet atomization injection assembly |
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| CN202120884702.6U CN214836642U (en) | 2021-04-27 | 2021-04-27 | SCR urea supersonic speed jet atomization injection assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113090363A (en) * | 2021-04-27 | 2021-07-09 | 广西卡迪亚科技有限公司 | SCR urea supersonic speed jet atomization injection assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113090363A (en) * | 2021-04-27 | 2021-07-09 | 广西卡迪亚科技有限公司 | SCR urea supersonic speed jet atomization injection assembly |
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Effective date of registration: 20211126 Address after: 530007 room 508, 5 / F, R & D building, Nanning ASEAN agricultural science and technology development enterprise headquarters base, No. 10, Gaoxin Third Road, Nanning, Guangxi Zhuang Autonomous Region Patentee after: Guangxi wobin Electronic Technology Co.,Ltd. Address before: 530007 Building A 604, A605 and A606, 88 West University Road, Nanning City, Guangxi Zhuang Autonomous Region Patentee before: GUANGXI KADIYA TECHNOLOGY Co.,Ltd. |
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