CN108266252A - A kind of air cooling air-assisted automatic control type urea liquid spraying system - Google Patents
A kind of air cooling air-assisted automatic control type urea liquid spraying system Download PDFInfo
- Publication number
- CN108266252A CN108266252A CN201810249991.5A CN201810249991A CN108266252A CN 108266252 A CN108266252 A CN 108266252A CN 201810249991 A CN201810249991 A CN 201810249991A CN 108266252 A CN108266252 A CN 108266252A
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- air
- injector
- solenoid valve
- liquid
- urea
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- 239000007788 liquid Substances 0.000 title claims abstract description 103
- 239000004202 carbamide Substances 0.000 title claims abstract description 97
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 238000001816 cooling Methods 0.000 title claims abstract description 30
- 238000005507 spraying Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- 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
- F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
- F01N3/2046—Periodically cooling catalytic reactors
-
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- 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
-
- 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
- F01N2610/146—Control thereof, e.g. control of injectors or injection valves
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to a kind of air cooling air-assisted automatic control type urea liquid spraying systems.It is characterized by comprising air source, urea tank and the injectors using negative pressure drainage, injector is made of middle part runner and external shell, air flue is formed between middle part runner and external shell, snorkel is set on external shell, snorkel is connected with air flue, and the runner exit of middle part runner is flushed with the air passage outlet of air flue；The top setting liquid inlet joint of the middle part runner, urea tank connect the liquid inlet joint of injector by liquid delivery tube, and air source connects the snorkel of injector by air shooter.The present invention, which devises 2 kinds of structures, realizes the mode of operation of two different liquid transmission pipeline emptying urea liquids, ensure when being stopped, there is no liquid residual in liquid transmission pipeline, the environment of pipeline when not worked by improving, after outer air source is from snorkel into air entering flue, stroke is longer, and the liquid by lumen tube, proportion magnetic valve and inner core can be cooled down.
Description
Technical field
The present invention relates to a kind of air cooling air-assisted automatic control type urea liquid spraying systems.
Background technology
Although gas helps formula, urea metering pump plays a crucial role in SCR aftertreatment system, existing gas
Help formula urea metering pump there is also it is following the drawbacks of：Complicated, manufacture cost is excessively high, and sealing structure requirement is high, the pump housing
It is detached with nozzle so that waste installation space, is unfavorable for integrating, it has not been convenient to which installation and repair, atomizing effect be not notable.Therefore,
Optimize structure, reduce manufacture cost, is easy to installation and maintenance, promoting the subject that atomizing effect is solved into urgent need.
Invention content
For problems of the prior art, the purpose of the present invention is to provide a kind of air cooling air-assisted automatic control types
The technical solution of urea liquid spraying system.
A kind of air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that including air source, urine
Plain tank and the injector using negative pressure drainage, injector are made of middle part runner and external shell, middle part runner and external shell
Between form air flue, snorkel is set on external shell, and snorkel is connected with air flue, the runner exit and air flue of middle part runner
Air passage outlet flush；The top setting liquid inlet joint of the middle part runner, urea tank connect injector by liquid delivery tube
Liquid inlet joint, air source by air shooter connect injector snorkel, injector jet port formed negative pressure.
A kind of air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that defeated in the liquid
It send and a branch pipe is drawn on pipe, branch pipe is communicated by a normally closed solenoid valve with air；Gas between the air source and injector is defeated
It send and an air constant pressure solenoid valve is set on pipe；One ratio electromagnetism is set on the liquid delivery tube between the injector and urea tank
Valve.
A kind of air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that the normally closed electromagnetism
Valve is closed type two-position two-way solenoid valve, and the normal-closed end of closed type two-position two-way solenoid valve connects the branch pipe, closed type two
The normally open end of two-way electromagnetic valve is communicated with air.
A kind of air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that in the urea tank
One normally open solenoid valve is set on the liquid delivery tube between injector；On air shooter between the air source and injector
One air constant pressure solenoid valve is set；One ratio electromagnetism is set on the liquid delivery tube between the injector and normally open solenoid valve
Valve.
A kind of air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that the normally opened electromagnetism
Valve is open type two-position three way magnetic valve, and the normally open end of open type two-position three way magnetic valve connects urea tank and liquid delivery tube,
The normal-closed end of open type two-position three way magnetic valve is communicated with air.
A kind of air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that the air constant pressure
Solenoid valve is closed type bi-bit bi-pass structure, and the proportion magnetic valve is normally closed structure.
A kind of novel air cooling air-assisted automatic control type urea liquid injector, it is characterised in that the ratio
Solenoid valve is arranged in the runner of middle part and positioned at the lower section of liquid inlet joint, runner below proportion magnetic valve by lumen tube and
Inner core is formed, and can be cooled down by the liquid in lumen tube and inner core by the gas of snorkel into air entering flue.
A kind of novel air cooling air-assisted automatic control type urea liquid injector, it is characterised in that the outside
Housing is made of lower housing and lower chamber, lower housing limiting inner core, lower chamber limiting lumen tube；The snorkel connection is arranged on
On lower chamber, the angle of snorkel and lower chamber can be adjusted.
The control method of the air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that including：
Spray regime：Air constant pressure solenoid valves are opened, and it is constant to make to enter compressed air flow velocity in injector, in injector
Jet port formed negative pressure, while normally closed solenoid valve power-off close, proportion magnetic valve be powered, make shape between urea tank and injector
Into pressure difference, the urea liquid in urea tank is pressed into injector, and simultaneously mist is mixed with compressed air in the jet port of injector
Change injection, urea liquid emitted dose is controlled by adjusting the duty ratio of proportion magnetic valve；
Emptying state：After the completion of injection, air constant pressure solenoid valve remains powered on, proportion magnetic valve standard-sized sheet, and normally closed solenoid valve is powered
It opens, the outlet of urea tank is communicated by normally closed solenoid valve with air, and the inlet and outlet pressure for making urea tank is the same, so as to connection
Urea liquid emptying in the liquid transmission pipeline of normally closed solenoid valve and proportion magnetic valve, emptying time are set as 30 seconds -60
Second；Air constant pressure solenoid valve is first closed at the end of emptying, is delayed 1 second -2 seconds, then successively closes proportion magnetic valve, normally closed electromagnetism
Valve.
The control method of the air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that including：
Spray regime：Air constant pressure solenoid valves are opened, and it is constant to make to enter compressed air flow velocity in injector, in injector
Jet port form negative pressure, while normally open solenoid valve power-off maintains a normally open, proportion magnetic valve is powered, make urea tank and injector it
Between form pressure difference, in the urea liquid press-in injector in urea tank, and mixed in the jet port of injector with compressed air
And atomized spray, urea liquid emitted dose are controlled by adjusting the duty ratio of proportion magnetic valve；
Emptying state：After the completion of injection, air constant pressure solenoid valve remains powered on, proportion magnetic valve standard-sized sheet, and normally open solenoid valve is powered,
The port closing of urea tank in this way, connect the liquid transmission pipeline of normally closed solenoid valve and proportion magnetic valve by normally open solenoid valve with
Air communicates, so as to which the urea liquid in the liquid transmission pipeline of connection normally open solenoid valve and proportion magnetic valve is emptied, emptying
Time is set as 30 seconds -60 seconds, and air constant pressure solenoid valve is first closed at the end of emptying, is delayed 1 second -2 seconds, then successively closes ratio
Example solenoid valve, normally open solenoid valve.
The present invention provides a kind of simple and reasonable injectors and spraying system, do not need to be specific in the prior art
SCR urea pumps control emitted dose, only adjust emitted dose with the duty ratio of proportion magnetic valve in adjusting injector, i.e., have simultaneously
There is the function of pump and nozzle；Devising 2 kinds of different structures simultaneously realizes two different liquid transmission pipeline emptying urea
The mode of operation of solution, ensures when being stopped, and does not have liquid residual in liquid transmission pipeline, is managed when not worked by improving
The environment on road avoids that pipeline is caused to bear, and extends pipeline service life；In addition after air source is from snorkel into air entering flue, stroke
It is longer, the liquid by lumen tube, proportion magnetic valve and inner core can be cooled down.
Description of the drawings
Fig. 1 is the first attachment structure schematic diagram；
Fig. 2 is the first evacuation structures schematic diagram；
Fig. 3 is second of attachment structure schematic diagram；
Fig. 4 is second of evacuation structures schematic diagram；
Fig. 5 is the structure diagram one of injector；
Fig. 6 is the structure diagram two of injector；
In figure：1- urea tanks, 2- normally closed solenoid valves, 3- proportion magnetic valves, 4- injectors, 5- air constant pressure solenoid valves, 6- air sources,
7- normally open solenoid valves, 8- snorkels, 9- lower housings, 10- inner cores, 11- air flues, 12- runners, 13- lower chambers, 14- lumen tubes,
15-C type seats, 16- liquid inlet joints.
Specific embodiment
The invention will be further described with reference to the accompanying drawings of the specification：
A kind of air cooling air-assisted automatic control type urea liquid spraying system, including air source 6, urea tank 1 and utilizes negative pressure drainage
Injector 4, injector 4 is made of middle part runner 12 and external shell, and air flue is formed between middle part runner 12 and external shell
11, snorkel 8 is set on external shell, and snorkel 8 is connected with air flue 11, the runner exit of middle part runner and the air flue of air flue
Outlet flushes；The top setting liquid inlet joint 16 of middle part runner, the feed liquor that urea tank 1 connects injector by liquid delivery tube connect
First 16, air source 6 connects the snorkel 8 of injector by air shooter, and negative pressure is formed in the jet port of injector.
Embodiment 1
A branch pipe is drawn on liquid delivery tube, branch pipe is communicated by a normally closed solenoid valve 2 with air；Between air source 6 and injector 5
Air shooter on an air constant pressure solenoid valve 5 is set；One ratio of setting on liquid delivery tube between injector and urea tank
Example solenoid valve 3.Normally closed solenoid valve is closed type two-position two-way solenoid valve, and the normal-closed end of closed type two-position two-way solenoid valve connects institute
Branch pipe is stated, the normally open end of closed type two-position two-way solenoid valve is communicated with air.Above-mentioned air constant pressure solenoid valve is closed type two
Two-way structure, proportion magnetic valve are normally closed structure.
The control method of the corresponding air cooling air-assisted automatic control type urea liquid spraying system of the embodiment is as follows,
Spray regime：Air constant pressure solenoid valves are opened, and it is constant to make to enter compressed air flow velocity in injector, in injector
Jet port formed negative pressure, while normally closed solenoid valve power-off close, proportion magnetic valve be powered, make shape between urea tank and injector
Into pressure difference, the urea liquid in urea tank is pressed into injector, and simultaneously mist is mixed with compressed air in the jet port of injector
Change injection, urea liquid emitted dose is controlled by adjusting the duty ratio of proportion magnetic valve；
Emptying state：After the completion of injection, air constant pressure solenoid valve remains powered on, proportion magnetic valve standard-sized sheet, and normally closed solenoid valve is powered
It opens, the outlet of urea tank is communicated by normally closed solenoid valve with air, and the inlet and outlet pressure for making urea tank is the same, so as to connection
Urea liquid emptying in the liquid transmission pipeline of normally closed solenoid valve and proportion magnetic valve, emptying time are set as 30 seconds -60
Second；Air constant pressure solenoid valve is first closed at the end of emptying, is delayed 1 second -2 seconds, then successively closes proportion magnetic valve, normally closed electromagnetism
Valve.
Embodiment 2
One normally open solenoid valve 7 is set on the liquid delivery tube between urea tank and injector；Gas between air source 6 and injector 4
One air constant pressure solenoid valve 5 is set in body delivery pipe；One ratio of setting on liquid delivery tube between injector and normally open solenoid valve
Example solenoid valve 3.Normally open solenoid valve is open type two-position three way magnetic valve, and the normally open end connection of open type two-position three way magnetic valve is urinated
Plain tank and liquid delivery tube, the normal-closed end of open type two-position three way magnetic valve are communicated with air.Above-mentioned air constant pressure solenoid valve is
Closed type bi-bit bi-pass structure, proportion magnetic valve are normally closed structure.
The control method of the corresponding air cooling air-assisted automatic control type urea liquid spraying system of the embodiment is as follows,
Spray regime：Air constant pressure solenoid valves are opened, and it is constant to make to enter compressed air flow velocity in injector, in injector
Jet port form negative pressure, while normally open solenoid valve power-off maintains a normally open, proportion magnetic valve is powered, make urea tank and injector it
Between form pressure difference, in the urea liquid press-in injector in urea tank, and mixed in the jet port of injector with compressed air
And atomized spray, urea liquid emitted dose are controlled by adjusting the duty ratio of proportion magnetic valve；
Emptying state：After the completion of injection, air constant pressure solenoid valve remains powered on, proportion magnetic valve standard-sized sheet, and normally open solenoid valve is powered,
The port closing of urea tank in this way, connect the liquid transmission pipeline of normally closed solenoid valve and proportion magnetic valve by normally open solenoid valve with
Air communicates, so as to which the urea liquid in the liquid transmission pipeline of connection normally open solenoid valve and proportion magnetic valve is emptied, emptying
Time is set as 30 seconds -60 seconds, and air constant pressure solenoid valve is first closed at the end of emptying, is delayed 1 second -2 seconds, then successively closes ratio
Example solenoid valve, normally open solenoid valve.
The structure of the present invention can save metering pump, however in order to control flow, set one can adjust in the runner of middle part
The proportion magnetic valve 3 of amount of restriction size, setting liquid inlet joint above proportion magnetic valve, runner below proportion magnetic valve by
Lumen tube 14 and inner core 10 are formed, by the gas of snorkel 8 into air entering flue can cool down by proportion magnetic valve, lumen tube and
Liquid in inner core.C-type seat 15 is set in lumen tube, and liquid inlet joint 16 is pressed on proportion magnetic valve 3 and is connect feed liquor with screw
Head is fixed on c-type seat.
Preferably, external shell is made of lower housing 9 and lower chamber 13, lower housing 9 limits inner core 10, and lower chamber 13 limits
Position lumen tube 14；Snorkel 8 is arranged on lower chamber 13, and snorkel 8 and the angle of lower chamber 13 can be adjusted.
Preferably, lower housing, lower chamber, inner core, lumen tube, air inlet pipe form air flue（Air cavity）；Lower chamber and lower housing
It can be connected by mounting flange, proportion of installation solenoid valve and c-type seat, ratio electromagnetism is pressed on by liquid inlet joint above lumen tube
On valve, then liquid inlet joint is fixed on c-type seat with screw.Liquid inlet joint, proportion magnetic valve, lumen tube, inner core form urine
The channel of plain solution.The injector of the present invention, in the mounting base of Diesel Engine Exhaust Pipe.
In use, air source passes through air constant pressure solenoid valve, from snorkel into air entering flue, jet port is finally reached.Air is permanent
The effect of pressure electromagnetic valve makes device obtain the gas of constant pressure.On the one hand the effect of air source makes jet port form negative pressure, play
The effect of imbibition, on the other hand, the gas of jet port can make atomizing effect more preferably.Finally, gas can also play cooling
Effect, cooling device are made of lower housing, lower chamber, inner core, lumen tube, air inlet pipe.
In order to make atomizing effect excellent, lower housing and inner core are in the radial clearance uniformity of outlet end, lower housing and inner core
It axially should be concordant in outlet end.
In traditional SCR urea systems, urea liquid is provided by urea pump drive, is produced in urea pump in the process
Raw higher pressure, the failure rate of sealing element are also high；The injector of the present invention, since gas makes channel interior generate negative pressure and shape
Into pressure difference, thus it is relatively low to pipeline sealing requirements.
The present invention is according to Bernoulli equation principle, and the speed of air-flow is bigger, and pressure is smaller.After energization, in aeration condition
Under, the outlet of injector forms negative pressure, and atmospheric pressure extrudes urea liquid from urea tank, by way of liquid inlet joint, ratio electromagnetism
Valve, lumen tube and inner core, are finally ejected, while reach preferable atomizing effect.
The present invention is integrated with nozzle by urea pump, has both had the function of urea pump, also the function comprising nozzle, effectively
Urea pump and nozzle is integrated.Structure is not only optimized in this way, can also significantly reduce manufacture cost, assembly cost
And maintenance cost.
Claims (10)
1. a kind of air cooling air-assisted automatic control type urea liquid spraying system, it is characterised in that including air source, urea tank and profit
With the injector of negative pressure drainage, injector is made of middle part runner and external shell, is formed between middle part runner and external shell
Air flue sets snorkel on external shell, and snorkel is connected with air flue, and the runner exit of middle part runner and the air flue of air flue go out
Mouth flushes；The top setting liquid inlet joint of the middle part runner, the feed liquor that urea tank connects injector by liquid delivery tube connect
Head, air source connect the snorkel of injector by air shooter, and negative pressure is formed in the jet port of injector.
2. a kind of air cooling air-assisted automatic control type urea liquid spraying system according to claim 1, it is characterised in that
A branch pipe is drawn on the liquid delivery tube, branch pipe is communicated by a normally closed solenoid valve with air；The air source and injector
Between air shooter on an air constant pressure solenoid valve is set；It is set on liquid delivery tube between the injector and urea tank
Put a proportion magnetic valve.
3. a kind of air cooling air-assisted automatic control type urea liquid spraying system according to claim 2, it is characterised in that
The normally closed solenoid valve is closed type two-position two-way solenoid valve, and the normal-closed end of closed type two-position two-way solenoid valve connects the branch
Pipe, the normally open end of closed type two-position two-way solenoid valve is communicated with air.
4. a kind of air cooling air-assisted automatic control type urea liquid spraying system according to claim 1, it is characterised in that
One normally open solenoid valve is set on the liquid delivery tube between the urea tank and injector；Between the air source and injector
One air constant pressure solenoid valve is set on air shooter；It is set on liquid delivery tube between the injector and normally open solenoid valve
One proportion magnetic valve.
5. a kind of air cooling air-assisted automatic control type urea liquid spraying system according to claim 4, it is characterised in that
The normally open solenoid valve be open type two-position three way magnetic valve, open type two-position three way magnetic valve normally open end connection urea tank with
Liquid delivery tube, the normal-closed end of open type two-position three way magnetic valve are communicated with air.
6. a kind of air cooling air-assisted automatic control type urea liquid spraying system according to claim 2 or 4, feature exist
It is closed type bi-bit bi-pass structure in the air constant pressure solenoid valve, the proportion magnetic valve is normally closed structure.
7. a kind of novel air cooling air-assisted automatic control type urea liquid injector according to claim 2 or 4, special
Sign is that the proportion magnetic valve is arranged in the runner of middle part and positioned at the lower section of liquid inlet joint, below proportion magnetic valve
Runner is made of lumen tube and inner core, can be cooled down by the liquid in lumen tube and inner core by the gas of snorkel into air entering flue
Body.
8. a kind of novel air cooling air-assisted automatic control type urea liquid injector according to claim 7, feature
It is that the external shell is made of lower housing and lower chamber, lower housing limiting inner core, lower chamber limiting lumen tube；The ventilation
Pipe connection is arranged on lower chamber, and the angle of snorkel and lower chamber can be adjusted.
9. a kind of control method of air cooling air-assisted automatic control type urea liquid spraying system as claimed in claim 3,
It is characterized in that including：
Spray regime：Air constant pressure solenoid valves are opened, and it is constant to make to enter compressed air flow velocity in injector, in injector
Jet port formed negative pressure, while normally closed solenoid valve power-off close, proportion magnetic valve be powered, make shape between urea tank and injector
Into pressure difference, the urea liquid in urea tank is pressed into injector, and simultaneously mist is mixed with compressed air in the jet port of injector
Change injection, urea liquid emitted dose is controlled by adjusting the duty ratio of proportion magnetic valve；
Emptying state：After the completion of injection, air constant pressure solenoid valve remains powered on, proportion magnetic valve standard-sized sheet, and normally closed solenoid valve is powered
It opens, the outlet of urea tank is communicated by normally closed solenoid valve with air, and the inlet and outlet pressure for making urea tank is the same, so as to connection
Urea liquid emptying in the liquid transmission pipeline of normally closed solenoid valve and proportion magnetic valve, emptying time are set as 30 seconds -60
Second；Air constant pressure solenoid valve is first closed at the end of emptying, is delayed 1 second -2 seconds, then successively closes proportion magnetic valve, normally closed electromagnetism
Valve.
10. a kind of control method of air cooling air-assisted automatic control type urea liquid spraying system as claimed in claim 5,
It is characterized in that including：
Spray regime：Air constant pressure solenoid valves are opened, and it is constant to make to enter compressed air flow velocity in injector, in injector
Jet port form negative pressure, while normally open solenoid valve power-off maintains a normally open, proportion magnetic valve is powered, make urea tank and injector it
Between form pressure difference, in the urea liquid press-in injector in urea tank, and mixed in the jet port of injector with compressed air
And atomized spray, urea liquid emitted dose are controlled by adjusting the duty ratio of proportion magnetic valve；
Emptying state：After the completion of injection, air constant pressure solenoid valve remains powered on, proportion magnetic valve standard-sized sheet, and normally open solenoid valve is powered,
The port closing of urea tank in this way, connect the liquid transmission pipeline of normally closed solenoid valve and proportion magnetic valve by normally open solenoid valve with
Air communicates, so as to which the urea liquid in the liquid transmission pipeline of connection normally open solenoid valve and proportion magnetic valve is emptied, emptying
Time is set as 30 seconds -60 seconds, and air constant pressure solenoid valve is first closed at the end of emptying, is delayed 1 second -2 seconds, then successively closes ratio
Example solenoid valve, normally open solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810249991.5A CN108266252A (en) | 2018-03-26 | 2018-03-26 | A kind of air cooling air-assisted automatic control type urea liquid spraying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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