CN109252924A - A kind of liquid reducing agent metering jetting device - Google Patents
A kind of liquid reducing agent metering jetting device Download PDFInfo
- Publication number
- CN109252924A CN109252924A CN201811248838.7A CN201811248838A CN109252924A CN 109252924 A CN109252924 A CN 109252924A CN 201811248838 A CN201811248838 A CN 201811248838A CN 109252924 A CN109252924 A CN 109252924A
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- Prior art keywords
- energy storage
- liquid
- pumpback
- urea
- branch
- Prior art date
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- 239000007788 liquid Substances 0.000 title claims abstract description 65
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 40
- 238000004146 energy storage Methods 0.000 claims abstract description 58
- 238000002347 injection Methods 0.000 claims abstract description 54
- 239000007924 injection Substances 0.000 claims abstract description 54
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000004202 carbamide Substances 0.000 claims abstract description 53
- 238000001914 filtration Methods 0.000 claims abstract description 44
- 239000007864 aqueous solution Substances 0.000 claims abstract description 39
- 241001062009 Indigofera Species 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 230000033228 biological regulation Effects 0.000 abstract description 7
- 230000009172 bursting Effects 0.000 abstract description 5
- 230000008014 freezing Effects 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 abstract description 5
- 239000007921 spray Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005213 imbibition Methods 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
-
- 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
- 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
- F01N2610/1426—Filtration means
-
- 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
Landscapes
- 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)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
Liquid reducing agent metering jetting device provided by the invention, by filtering energy storage device by delivery pump to its discontinuously ftercompction in the way of i.e. can reach aqueous solution of urea spray voltage regulation result, using throttle valve and pressure valve it is constantly overflowed back by delivery pump compared with liquid mode reaches aqueous solution of urea injection voltage regulation result with the prior art, urea measuring and injecting device it is simple and reliable for structure, the service life (not having to high-load operation) and reliability of delivery pump are not only increased, and greatly reduces the operating cost of device.In addition, the injection of device and pump-down switching are not necessarily to complicated two position and four-way reversing valve, greatly reduce apparatus structure complexity and increase its reliability, and reduce its bursting by freezing risk.
Description
Technical field
The invention belongs to diesel motor exhausts to post-process field, be related to a kind of liquid reducing agent metering jetting device, special
It is not related to a kind of urea measuring and injecting device.
Background technique
Liquid reducing agent (such as aqueous solution of urea) metering jetting device is diesel engine selective catalytic reduction system operating
An important device in (Selective Catalytic Reduction, abbreviation SCR), its working principle is that: in device
Aqueous solution of urea is sucked out by delivery pump from urea storage case, and the aqueous solution of urea of steady pressure is formed by voltage regulation unit,
Aqueous solution of urea is quantified by dosage module again and is injected into catalytic muffler with subtle mist, in this way, subtle misty urine
Plain aqueous solution first at high temperature occur hydrolysis and pyrolytic reaction after generate ammonia, then ammonia in catalytic muffler with diesel oil
Redox reaction occurs for the nitrogen oxides in engine discharging tail gas, nitrogen and water is regenerated, to reach reduction diesel oil
The purpose of engine nox emission.
It is a kind of aqueous solution of urea metering jetting device of the prior art, by aqueous solution of urea storage bin 1, imbibition such as Fig. 1
Pipe A2, filter 3, pipette B4, two position and four-way reversing valves 5, pipette C6, delivery pump 7 (have aqueous solution of urea supply and return
Take out function), main injection pipe 8, injection pipe A9, two position and four-way reversing valves 5, injection pipe B10, dosage module 11, liquid back pipe A12, pressure
Force snesor 13, pressure valve 14, liquid back pipe B15, throttle valve 16, liquid back pipe C17, pumpback pipe A18, pumpback pipe B19, pumpback pipe
C20 and pumpback pipe D21 is constituted.
Its working principles are as follows:
Metered injection process: delivery pump 7 is started to work after system electrification, by aqueous solution of urea by inhaling from its storage bin 1
Liquid pipe A2 extraction, pass sequentially through supply branch in filter 3, pipette B4, two position and four-way reversing valves 5, pipette C6 enter it is defeated
Send pump 7, then flow out in injection branch and be divided into two-way after main injection pipe 8: (injection branch) is successively by injection pipe A9, two all the way
Four-way reversing valve 5, injection pipe B10 reach dosage module 11；Another way (overflow branch) is successively by liquid back pipe A12, pressure sensing
Device 13, pressure valve 14, liquid back pipe B15, throttle valve 16, liquid back pipe C17, flow back into storage bin 1.
Evacuation process: be first powered two position and four-way reversing valves 5 of commutation, then the automatically controlled nozzle opened in dosage module 11, then
Electric control starting delivery pump 7, in this way stopping metering jetting device when, residual in a device aqueous solution of urea successively by injection branch
Dosage module 11, injection pipe B10, pumpback pipe A18, two position and four-way reversing valves 5, pumpback pipe 19 in pumpback branch are supplied in branch
Then pipette C6 sucks delivery pump 7；Again successively from supply branch in main injection pipe 8, injection branch in injection pipe A9, pumpback
Pumpback pipe B20, two position and four-way reversing valves 5, pumpback pipe D21 in branch, then through pipette B4, filter 3, imbibition in supply branch
Pipe A2 finally flows back to storage bin 1.
The constantly withdrawing fluid into storage bin 1 of throttle valve 16 is utilized during above-mentioned metering jetting device metered injection
(purpose is to ensure that dosage module 11 is sprayed pressure and stablized using aqueous solution of urea overflow, to guarantee that aqueous solution of urea injection is quasi-
True property), the operating condition of this metering jetting device is very high to reliability and the service life requirement of delivery pump 7, is otherwise difficult
Achieve the purpose that reduce diesel engine discharged nitrous oxides.In addition, not only two used when above-mentioned metering jetting device evacuates
Structure is complicated for four-way reversing valve 5, and pumpback branch connecting line is complicated, while the reversal valve and pumpback bypass line when evacuating
It inside can usually remain some aqueous solution of urea, its winter is caused often not to be available by bursting by freezing.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide a kind of structures simply, the liquid reduction of high reliablity
Agent metering jetting device, including for controlling the controller powered, for storing liquid reducing agent to equipment in described device
Storage bin, the supply branch for extracting liquid reducing agent in the storage bin out are used for the liquid of the supply branch output
State reducing agent filters the filtering energy storage device of simultaneously energy storage, for that described will filter the liquid reduction for filtering simultaneously energy storage in energy storage device
The injection branch that agent ejects, and being used for will be in the supply branch, the filtering energy storage device and the injection branch
The pumpback branch of remaining liquid reducing agent pumpback.Further, the supply branch routes the storage bin, electric drive conveying
Pump, check-valves and the filtering energy storage device pass sequentially through connecting tube and connect and compose；The injection branch routes the filtering energy storage
Device and dosage module are connected and composed by connecting tube, and branch connects one in the connecting tube between filtering energy storage device and dosage module
Pressure sensor；The pumpback branch routes the filtering energy storage device, pumpback pump module and the storage bin and passes sequentially through connection
Pipe connects and composes, wherein the pumpback pump module includes the electric drive pumpback pump and electromagnetism on-off valve being serially connected.Further
Ground concatenates a filter described in the supply branch on connecting line between storage bin and electric drive delivery pump.Above scheme
Further specific improvement project it is as follows:
Above three scheme is further improved are as follows: the liquid reducer is aqueous solution of urea or AdBlue or adds indigo plant.
Two schemes are further improved after above-mentioned are as follows: the electric drive delivery pump selects motor or solenoid actuated；Institute
It states electric drive pumpback pump and selects motor or solenoid actuated.
Above-mentioned second scheme is further improved are as follows: the filtering energy storage device is hollow rubber energy storage filter device.
Above-mentioned third scheme is further improved are as follows: the filtering energy storage device is hollow rubber energy storage filter device.
Above-mentioned second scheme is further improved scheme and third scheme is further improved scheme and is further improved such as
Under:
1) the hollow rubber energy storage filter device is mainly made of INVENTIONPaper filter layer, hollow rubber bar and hat shape shell,
The INVENTIONPaper filter layer and hollow rubber bar are successively embedded in and on the outside of the end by band center from open one end of hat shape shell
The end cap in hole is fixed；One liquid reducer entrance is set and passes through the INVENTIONPaper filter layer in the other end of the shell and is passed straight through to
Liquid reducer jet exit is arranged, at the side wall bottom of the shell in the hollow rubber bar in the middle part of the side wall of the shell
Portion is arranged liquid reducer and goes back to liquid outlet.Further, the liquid reducer for aqueous solution of urea or AdBlue or adds indigo plant.
2) the electric drive delivery pump selects motor or solenoid actuated；Electric drive pumpback pump (28) select motor or
Solenoid actuated.Further, the liquid reducer for aqueous solution of urea or AdBlue or adds indigo plant.
3) the hollow rubber energy storage filter device is mainly made of INVENTIONPaper filter layer, hollow rubber bar and hat shape shell,
The INVENTIONPaper filter layer and hollow rubber bar are successively embedded in and on the outside of the end by band center from open one end of hat shape shell
The end cap in hole is fixed；One liquid reducer entrance is set and passes through the INVENTIONPaper filter layer in the other end of the shell and is passed straight through to
Liquid reducer jet exit is arranged, at the side wall bottom of the shell in the hollow rubber bar in the middle part of the side wall of the shell
Portion is arranged liquid reducer and goes back to liquid outlet.Further, the electric drive delivery pump selects motor or solenoid actuated；The electricity
Pumpback pump (28) is driven to select motor or solenoid actuated.Still further, the liquid reducer be aqueous solution of urea or
AdBlue adds indigo plant.
Liquid reducing agent metering jetting device provided by the invention passes through electric drive delivery pump pair using filtering energy storage device
Discontinuously ftercompction mode can reach liquid reducing agent injection voltage regulation result for it, logical using throttle valve and pressure valve with the prior art
Cross electric drive delivery pump it is constantly overflowed back liquid mode reach liquid reducing agent (aqueous solution of urea) injection voltage regulation result phase
More simple and reliable for structure than, metering jetting device, the service life for not only increasing electric drive delivery pump (does not have to big load to transport
Turn) and reliability, and greatly reduce the operating cost of device.In addition, the injection of device and pump-down switching are not necessarily to
Complicated two position and four-way reversing valve greatly reduces apparatus structure complexity and increases its reliability, and reduces it
Bursting by freezing risk.
Detailed description of the invention
Fig. 1 is prior art urea measuring and injecting device system schematic.
Fig. 2 is urea measuring and injecting device system schematic of the invention.
Fig. 3 is a kind of filtering energy storage device cross-sectional structure schematic diagram in Fig. 2 system.
Fig. 4 is the A-A vertical section structure schematic diagram of Fig. 3.
Specific embodiment
With reference to the accompanying drawing and urea measuring and injecting device provided by the invention is described in detail in specific embodiment.
The present embodiment provides a kind of urea measuring and injecting device system schematics, as shown in Fig. 2, including for the dress
Set the controller (not shown) of middle equipment control power supply, for the storage bin 1 of storing liquid reducing agent, for by the storage
Deposit supply branch, the liquid reducing agent filtering for exporting the supply branch and energy storage that liquid reducing agent in case 1 is extracted out
Filtering energy storage device 24, for will the spray that ejects of liquid reducing agent of filtering and energy storage in the filtering energy storage device 24
Branch is penetrated, and is used for remaining liquid in the supply branch, the filtering energy storage device 24 and the injection branch also
The pumpback branch of former agent pumpback；The supply branch routes the storage bin 1, pipette A2, filter 3, pipette B4, electric drive
Delivery pump 7 (having functions of physical supply), pipette C6, check-valves 22, pipette D23 and the filtering energy storage device 24 pass sequentially through
It is in series；The injection branch routes the filtering energy storage device 24, injection pipe 9 and dosage module 11 and is followed in series to form,
Branch connects a pressure sensor 13 on injection pipe 9；The pumpback branch routes the filtering energy storage device 24, pumpback pipe 25, pumpback pump
Module 26, liquid back pipe 27 and storage bin 1 are followed in series to form, and wherein pumpback pump module 26 includes the electric drive pumpback being serially connected
Pump 28 (having the function of pumpback) and electromagnetism on-off valve 29.Wherein check-valves 22 is that aqueous solution of urea pressure reaches one in pipette C6
A kind of valve opened when definite value.Wherein, the electric drive delivery pump 7 selects motor or solenoid actuated；The electric drive pumpback
Pump 28 selects motor or solenoid actuated；The filtering energy storage device 24 is hollow rubber energy storage filter device, such as the institute of Fig. 3 and 4
It is shown as a kind of hollow rubber energy storage filter device, is mainly made of INVENTIONPaper filter layer 01, hollow rubber bar 02 and hat shape shell 03,
INVENTIONPaper filter layer 01 and hollow rubber bar 02 are successively embedded in and on the outside of the end from open one end of hat shape shell 03 by band
The end cap 04 in heart hole is fixed (passing through screw thread)；Urea liquid entrance 05 is set in the other end of the shell 03 and passes through the paper
Matter filter layer 01 passes straight through to the hollow rubber bar 02, and connect with pipette D23；Urea is set in the middle part of the side wall of shell 03
Solution jet exit 07 is connect with injection pipe 9；(it is arranged in the sidewall bottom of shell 03 and is conducive to urea liquid in sidewall bottom
Evacuate) setting urea liquid time liquid outlet 06, it is connected with pumpback pipe 25.
Its metered injection process include build pressure stage, injection phase, pump-down, its working principles are as follows:
One, the pressure stage is built:
Purpose is: energy storage device 24 is filtered in the aqueous solution of urea injection in storage bin 1 in a short time and reaches device
The injection pressure of defined；Detailed process is as follows:
1) its controller by temperature sensor, (do not show in Fig. 4 by environment temperature locating for its monitoring device after device power-up
Whether signal judgment means out) will start heating thaw routine；
If 2) do not need heating defrosting process (if desired, after wait process of thawing), electric drive delivery pump 7 and pumpback pump
Module 26 directly starts to start, and aqueous solution of urea is from storage bin 1 successively by pipette A2, filter 3, pipette B4, electric drive
Delivery pump 7, pipette C6, check-valves 22, pipette D23, injection are filtered in energy storage device 24；
3) stop pumpback pump module 26 after (about 30 seconds) through after a period of time, while starting dosage module 11, electric drive is defeated
Pump 7 is sent to then continue to work (purpose is the air in order to be discharged in filtering energy storage device 24, injection pipe 9 and dosage module 11),
Dosage module 11 is closed after a period of time；
4) when 13 pressure of pressure sensor for monitoring to be connected on injection pipe 9 reaches authorized pressure value and stablizes, electricity
Driving delivery pump 7 stops working, and building the pressure stage terminates.
Aqueous solution of urea building in filtering energy storage device 24 presses stage flow route as follows:
The aqueous solution of urea with pressure flowed out by check-valves 22, flows through pipette D23, and the urea for first filtering energy storage device 24 is molten
Liquid entrance 05 is directly injected into space between its INVENTIONPaper filter layer 01 and hollow rubber bar 02, then pass through its INVENTIONPaper filter layer 01 into
Enter space between INVENTIONPaper filter layer 01 and shell 03, finally by the urea liquid jet exit 07 of filtering energy storage device 24 through spraying
Pipe 9 flows out.
Two, injection phase:
After building the pressure stage, when device receives injection control signal, Setup Controller is between certain pulse frequency
Dosage module 11 is opened disconnectedly, and device carries out aqueous solution of urea metered injection；During metered injection, by building the pressure stage only
Returning the aqueous solution of urea pressure formed in the space that valve 22, pipette D23, filtering energy storage device 24, injection pipe 9 are constituted can be at once
Decline；When the pressure of the space aqueous solution of urea decrease beyond defined permissible value, the starting supplement urea of electric drive delivery pump 7
Solution makes aqueous solution of urea pressure in the space be maintained within the scope of authorized pressure value i.e. stopping fluid infusion (to ensure dosage module 11
The accuracy of metered injection)；In check-valves 22, pipette D23, filtering energy storage device 24, injection pipe 9 during metered injection
When the aqueous solution of urea pressure formed in the space of composition decrease beyond defined permissible value again, it is again started up electric drive delivery pump
7 fluid infusion are maintained at its pressure within the scope of authorized pressure value；Constantly circulation is gone down in this way.
Three, pump-down:
After injection phase, since dosage module 11, electric drive delivery pump 7 and pumpback pump module 26 stop working,
In this way, remaining can not be ejected in the space that check-valves 22, pipette D23, filtering energy storage device 24, injection pipe 9 are constituted
Aqueous solution of urea with pressure.
Bursting by freezing pipeline or/and equipment when above-mentioned remaining aqueous solution of urea low temperature with pressure in order to prevent, device needs are opened back
After taking out pump module 26 (i.e. the electric drive pumpback pump 28 of pumpback pump module is to open simultaneously with electromagnetism on-off valve 29), and works as and monitor
When the pressure of 13 aqueous solution of urea of pressure sensor is lower than specified value, it is then turned on dosage module 11；In this way, above-mentioned remaining urine with pressure
Plain aqueous solution respectively by dosage module 11, injection pipe 9 and check-valves 22, pipette D23, then successively through filtering energy storage device 24,
Pumpback pipe 25, pumpback pump module 26 and liquid back pipe 27, are injected back into storage bin 1；After one section of evacuated time, device closes dosage
Module 11 and pumpback pump module 26, i.e. pump-down terminate.
This implementation injection phase by filtering energy storage device 24 by electric drive delivery pump 7 to its discontinuously ftercompction in the way of be
It can reach aqueous solution of urea injection voltage regulation result, electric drive delivery pump passed through using throttle valve 16 and pressure valve 14 with the prior art
7 pairs its constantly overflow back liquid mode reach aqueous solution of urea injection voltage regulation result compare, the structure of urea measuring and injecting device
Simply, and the service life and reliability of electric drive delivery pump 7 are increased, while greatly reduces the operating cost of device.
In addition, injection and pump-down switching are not required to complicated two position and four-way reversing valve 5, apparatus structure complexity is greatly reduced
Property increases its reliability, and reduces its bursting by freezing risk.
In addition, the filtering energy storage device 24 of the present embodiment is also possible to the hollow rubber energy storage filter device of other structures i.e.
Can, it is not limited by the specific structure of the present embodiment.
The aqueous solution of urea of the present embodiment can also be AdBlue or add the liquid reducing agents such as indigo plant.
Above embodiments are only in terms of the liquid reducing agent of the compositions such as specific electric drive delivery pump 7, filtering energy storage device 24
Amount injection apparatus elaborates the present invention, but as long as with above-mentioned electric drive delivery pump 7, all similar devices of filtering energy storage device 24 etc.
It can complete all belonging to the scope of protection of the present invention for inventive concept；Therefore the present invention is not limited by above-described embodiment, is not being taken off
Under the premise of from spirit and scope of the invention, the invention also has various changes and changes, and these changes and changes both fall within requirement
In the scope of the invention of protection；The scope of the present invention is defined by the appended claims and its equivalents.
Claims (11)
1. a kind of liquid reducing agent metering jetting device, which is characterized in that including for equipment control power supply in described device
Controller, for storing liquid reducing agent storage bin (1), for by the storage bin (1) liquid reducing agent extract out
Supply branch, for by it is described supply branch output liquid reducing agent filtering and energy storage filtering energy storage device (24), be used for
By the injection branch that the liquid reducing agent of filtering and energy storage ejects in filtering energy storage device (24), and it is used for institute
State supply branch, filtering energy storage device (24) and the pumpback branch for spraying remaining liquid reducing agent pumpback in branch
Road.
2. metering jetting device according to claim 1, which is characterized in that the supply branch routes the storage bin (1), electricity
Driving delivery pump (7), check-valves (22) and the filtering energy storage device (24) pass sequentially through connecting tube and connect and compose；The injection
Branch routes the filtering energy storage device (24) and dosage module (11) is connected and composed by connecting tube, in filtering energy storage device (24)
Branch connects a pressure sensor (13) in connecting tube between dosage module (11)；The pumpback branch routes the filtering energy storage dress
It sets (24), pumpback pump module (26) and the storage bin (1) to pass sequentially through connecting tube and connect and compose, wherein the pumpback pump module
It (26) include the electric drive pumpback pump (28) and electromagnetism on-off valve (29) being serially connected.
3. metering jetting device according to claim 2, which is characterized in that storage bin (1) described in the supply branch and
A filter (3) are concatenated on connecting line between electric drive delivery pump (7).
4. according to claim 1 or 2 or 3 metering jetting devices, which is characterized in that the liquid reducer is that urea is water-soluble
Liquid or AdBlue add indigo plant.
5. the metering jetting device according to Claims 2 or 3, which is characterized in that the electric drive delivery pump (7) selects motor
Or solenoid actuated；The electric drive pumpback pump (28) selects motor or solenoid actuated.
6. metering jetting device according to claim 2, which is characterized in that the filtering energy storage device (24) is hollow rubber
Energy storage filter device.
7. metering jetting device according to claim 3, which is characterized in that the filtering energy storage device (24) is hollow rubber
Energy storage filter device.
8. metering jetting device described according to claim 6 or 7, which is characterized in that the hollow rubber energy storage filter device master
It to be made of INVENTIONPaper filter layer (01), hollow rubber bar (02) and hat shape shell (03), the INVENTIONPaper filter layer (01) and hollow
Rubber bar (02) is successively embedded in from open one end of hat shape shell (03) and passes through the end cap (04) with centre bore on the outside of the end
It is fixed；One liquid reducer entrance (05) is set in the other end of the shell (03) and passes through the INVENTIONPaper filter layer (01) directly
The hollow rubber bar (02) is passed to, liquid reducer jet exit (07) is set in the middle part of the side wall of the shell (03),
The sidewall bottom setting liquid reducer of the shell (03) goes back to liquid outlet (06).
9. metering jetting device described according to claim 6 or 7, which is characterized in that the electric drive delivery pump (7) selects motor
Or solenoid actuated；The electric drive pumpback pump (28) selects motor or solenoid actuated.
10. metering jetting device according to claim 8, which is characterized in that the liquid reducer be aqueous solution of urea or
AdBlue adds indigo plant.
11. metering jetting device according to claim 9, which is characterized in that the liquid reducer be aqueous solution of urea or
AdBlue adds indigo plant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811248838.7A CN109252924A (en) | 2018-10-25 | 2018-10-25 | A kind of liquid reducing agent metering jetting device |
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| CN201811248838.7A CN109252924A (en) | 2018-10-25 | 2018-10-25 | A kind of liquid reducing agent metering jetting device |
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| CN109252924A true CN109252924A (en) | 2019-01-22 |
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| CN201811248838.7A Pending CN109252924A (en) | 2018-10-25 | 2018-10-25 | A kind of liquid reducing agent metering jetting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113606018A (en) * | 2021-08-05 | 2021-11-05 | 宁波楷世环保科技有限公司 | Urea solution back-pumping control device and fault diagnosis method thereof |
| CN114483262A (en) * | 2021-12-29 | 2022-05-13 | 潍柴动力股份有限公司 | Urea pump, and control method and control system for urea pump |
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| DE102012223028A1 (en) * | 2012-12-13 | 2014-06-18 | Robert Bosch Gmbh | Device for damping pressure fluctuations in fluid, has damping element which is arranged on side of compensation element, so that deformation of compensation element is reformed under force effect of damping element on compensation element |
| CN209293886U (en) * | 2018-10-25 | 2019-08-23 | 西安秦泰汽车排放技术有限公司 | A kind of liquid reducing agent metering jetting device |
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| DE102012223028A1 (en) * | 2012-12-13 | 2014-06-18 | Robert Bosch Gmbh | Device for damping pressure fluctuations in fluid, has damping element which is arranged on side of compensation element, so that deformation of compensation element is reformed under force effect of damping element on compensation element |
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| CN113606018A (en) * | 2021-08-05 | 2021-11-05 | 宁波楷世环保科技有限公司 | Urea solution back-pumping control device and fault diagnosis method thereof |
| CN114483262A (en) * | 2021-12-29 | 2022-05-13 | 潍柴动力股份有限公司 | Urea pump, and control method and control system for urea pump |
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| US20240125262A1 (en) * | 2021-12-29 | 2024-04-18 | Weichai Power Co., Ltd | Urea pump, and control method and control system for urea pump |
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