CN114046195A - Urea injection device - Google Patents
Urea injection device Download PDFInfo
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- CN114046195A CN114046195A CN202111153178.6A CN202111153178A CN114046195A CN 114046195 A CN114046195 A CN 114046195A CN 202111153178 A CN202111153178 A CN 202111153178A CN 114046195 A CN114046195 A CN 114046195A
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- urea
- injection
- quality sensor
- pipe
- tank
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- 239000004202 carbamide Substances 0.000 title claims abstract description 318
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 308
- 238000002347 injection Methods 0.000 title claims abstract description 110
- 239000007924 injection Substances 0.000 title claims abstract description 110
- 239000007788 liquid Substances 0.000 claims abstract description 77
- 239000000243 solution Substances 0.000 claims abstract description 57
- 239000012535 impurity Substances 0.000 claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 230000008569 process Effects 0.000 claims abstract description 3
- 239000000523 sample Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 abstract description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 150000003672 ureas Chemical class 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- 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
- F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
-
- 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
- F01N2610/1433—Pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The application discloses urea injection apparatus for reduce the bubble or the impurity that can adhere to on the ultrasonic wave quality sensor in the device, improve ultrasonic wave quality sensor's detection precision. The device of this application includes: the device comprises a urea tank, a metering injection pump, a urea liquid inlet pipe, a urea liquid return pipe and a urea injection assembly; the metering injection pump is connected with the urea injection assembly; the urea tank is internally provided with an ultrasonic quality sensor and is used for storing urea solution; the metering jet pump is connected with the urea tank through the urea liquid inlet pipe and the urea liquid return pipe loop; the urea returns the liquid union coupling the export of the one end of urea jar is located ultrasonic wave quality sensor below, urea returns the liquid union coupling and is used for with urea solution among the measurement jet pump flows back, and the urea solution of backward flow is used for with adnexed bubble or impurity carry out the cleaning process on the ultrasonic wave quality sensor.
Description
Technical Field
The application relates to the field of diesel engines, in particular to a urea injection device.
Background
Since the advent of diesel engines, diesel engines have been widely used in various fields such as heavy-duty automobiles, large-sized buses, construction machines, ships and the like by virtue of their characteristics such as good dynamic properties, economy, endurance and the like.
At present, in order to meet the emission standard of the pollutants of the motor vehicle in the sixth stage of the country and other relevant emission standards, aiming at the pollutants generated by a diesel engine, such as particulate matters, nitrogen oxides and the like, a urea injection device is utilized to inject a urea solution into the exhaust gas of the diesel engine, so that the exhaust gas is subjected to catalytic reduction reaction for purification, and the effect of emission reduction is achieved.
However, the ultrasonic sensor provided in the conventional urea injection device is located inside the urea tank, and the urea solution is stored in the urea tank, so that the ultrasonic sensor is exposed in the urea solution in the urea tank, and impurities or bubbles may adhere to the ultrasonic sensor, which may cause the ultrasonic signal to be easily interfered by the attachments such as the impurities or the bubbles, thereby affecting the detection accuracy of the ultrasonic sensor, and causing the normal operation of the urea injection device to be interfered.
Disclosure of Invention
The embodiment of the application provides a urea injection apparatus, can clear away the bubble or the impurity that can adhere to on the ultrasonic wave quality sensor among the urea injection apparatus to improve the detection precision of sensor.
The urea injection device that this application embodiment provided includes:
the device comprises a urea tank, a metering injection pump, a urea liquid inlet pipe, a urea liquid return pipe and a urea injection assembly;
the metering injection pump is connected with the urea injection assembly;
the urea tank is internally provided with an ultrasonic quality sensor and is used for storing urea solution;
the metering jet pump is connected with the urea tank through the urea liquid inlet pipe and the urea liquid return pipe loop;
the urea returns the liquid union coupling the export of the one end of urea jar is located ultrasonic wave quality sensor below, urea returns the liquid union coupling and is used for with urea solution among the measurement jet pump flows back, and the urea solution of backward flow is used for with adnexed bubble or impurity carry out the cleaning process on the ultrasonic wave quality sensor.
Optionally, the urea injection assembly comprises: urea injection pipe and urea nozzle assembly;
and one end of the urea injection pipe is connected with the metering injection pump, and the other end of the urea injection pipe is connected with the urea nozzle component.
Optionally, the urea nozzle assembly is provided with at least one urea nozzle.
Optionally, the urea injection device further comprises: a urea liquid inlet filter screen;
the urea liquid inlet filter screen is positioned at an outlet of one end of the urea liquid inlet pipe close to the urea tank;
the urea liquid inlet filter screen is connected with the outlet of the urea liquid inlet pipe.
Optionally, the metering jet pump is provided with a liquid outlet, a liquid inlet and a jet port;
the urea injection assembly, the urea liquid inlet pipe and the urea liquid return pipe are respectively connected with the metering injection pump through the injection port, the liquid inlet and the liquid outlet.
Optionally, the ultrasonic quality sensor is provided with a probe;
and the outlet of one end of the urea return pipe connected with the urea tank is positioned below the probe of the ultrasonic quality sensor.
Optionally, the ultrasonic quality sensor is located at the bottom of the urea tank and has a preset height with the bottom of the urea tank.
Optionally, one end of the urea liquid inlet pipe close to the urea tank is connected with the urea tank through a pipe joint.
Optionally, the ultrasonic quality sensor is connected with the metering jet pump through a connecting pipe.
According to the technical scheme, the method has the following advantages:
the urea injection device comprises a urea tank, a metering injection pump, a urea liquid inlet pipe, a urea liquid return pipe and a urea injection assembly; the metering injection pump is connected with the urea injection assembly; the ultrasonic quality sensor is arranged in the urea tank, the urea tank stores urea solution, and the metering injection pump is connected with the urea tank through a urea liquid inlet pipe and a urea liquid return pipe loop; the outlet of one end of the urea return pipe connected with the urea tank is positioned below the ultrasonic quality sensor. This scheme of adoption, when measurement jet pump during operation, the urea solution in the urea jar pumps into the measurement jet pump from urea feed liquor pipe, the urea solution partly entering that the pump advances in the measurement jet pump is used for spraying with the urea injection subassembly that the measurement jet pump is connected, partly return to the urea jar through urea return liquid pipe in, specifically, return to ultrasonic wave quality sensor below, consequently, thereby can strike ultrasonic wave quality sensor through utilizing the urea solution of following urea return liquid pipe and flow away on the ultrasonic wave quality sensor attached bubble or impurity, and then improve ultrasonic wave quality sensor's detection precision.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a urea injection apparatus provided herein;
fig. 2 is a partial schematic structural diagram of a urea injection device provided in the present application.
Detailed Description
In the embodiments of the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for explaining relative positional relationships between the respective members or components, and do not particularly limit specific mounting orientations of the respective members or components.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the structures, the proportions, the sizes, and the like, which are illustrated in the accompanying drawings and described in the present application, are intended to be considered illustrative and not restrictive, and therefore, not limiting, since those skilled in the art will understand and read the present application, it is understood that any modifications of the structures, changes in the proportions, or adjustments in the sizes, which are not necessarily essential to the practice of the present application, are intended to be within the scope of the present disclosure without affecting the efficacy and attainment of the same.
The embodiment of the application provides a urea injection device, can clear away bubble or impurity that can adhere to on the ultrasonic wave quality sensor among the urea injection device to improve the detection precision of ultrasonic wave quality sensor among the urea injection device. The embodiment of the application can be applied to various diesel vehicle tail gas treatment systems, and pollutants in the exhaust gas of the diesel engine, such as nitrogen oxide (NOx), particulate matters and the like, are purified by using the urea injection device to inject the urea solution, so that the emission reduction effect is achieved.
Referring to fig. 1 and 2, the present application provides a urea injection device including:
the device comprises a urea tank 5, a metering injection pump 1, a urea liquid inlet pipe 3, a urea liquid return pipe 4 and a urea injection assembly 6;
the metering injection pump 1 is connected with the urea injection assembly 6;
the urea tank 5 is internally provided with an ultrasonic quality sensor 2, and the urea tank 5 is used for storing urea solution;
the metering jet pump 1 and the urea tank 5 are connected with the urea return pipe 4 through the urea liquid inlet pipe 3;
the outlet of the urea return pipe 4 connected to one end of the urea tank 5 is located below the ultrasonic quality sensor 2, the urea return pipe 4 is used for returning the urea solution in the metering injection pump 1, and the returned urea solution is used for removing bubbles or impurities attached to the ultrasonic quality sensor 2.
In this embodiment, urea tank 5 also can be called as the urea case, has placed urea solution in urea tank 5, and this urea solution passes through Selective Catalytic Reduction (SCR) with the harmful gas that discharges among the diesel vehicle and converts into nitrogen and water to play the effect of reducing discharging. The urea tank 5 may be made of a metal material or a plastic material that is inert to the urea solution, and is not limited herein.
In this embodiment, the metering injection pump 1 is connected to the urea injection assembly 6, and the urea injection assembly 6 is configured to inject a urea solution into the exhaust pipe, so that the injected urea solution and nitrogen oxides in the exhaust gas chemically react to purify pollutants in the exhaust gas. The metering urea pump is connected with a loop of the urea tank 5 through a urea liquid inlet pipe 3 and a urea liquid return pipe 4. The main function of the metering injection pump 1 is to extract the urea solution in the urea tank 5 through the urea inlet pipe 3, convey a part of the extracted urea solution to the urea injection assembly 6 for injection, and return a part of the extracted urea solution to the urea tank 5 through the urea return pipe 4. The urea tank 5 is provided therein with an ultrasonic quality sensor 2, and the ultrasonic quality sensor 2 can be used to detect the concentration of the urea solution in the urea tank 5.
When the outlet of the urea return pipe 4 connected to one end of the urea tank 5 is located near the ultrasonic quality sensor 2, the ultrasonic quality sensor 2 may be subjected to some impact by the returned urea solution. In this embodiment, the outlet of the urea return pipe 4 connected to one end of the urea tank 5 is located below the ultrasonic quality sensor 2. When the urea injection device works, the urea solution stored in the urea tank 5 is pumped into the metering injection pump 1 by the metering injection pump 1 from the urea liquid inlet pipe 3, a part of the urea solution entering the metering injection pump 1 is conveyed to the urea injection assembly 6 connected with the metering injection pump 1 for being injected into exhaust gas, the rest part of the urea solution flows back into the urea tank 5 through the urea liquid return pipe 4, and the outlet of the urea liquid return pipe 4 is positioned below the ultrasonic quality sensor 2, so that the urea solution flowing back in the urea liquid return pipe 4 can impact the ultrasonic quality sensor 2 to a certain degree when flowing out from the outlet of the urea liquid return pipe 4, bubbles or impurities attached to the ultrasonic quality sensor 2 are washed away, and the detection precision of the ultrasonic quality sensor 2 in the urea tank 5 can be improved.
Optionally, the urea injection assembly 6 comprises: a urea injection pipe 61 and a urea nozzle assembly 62;
the urea injection pipe 61 has one end connected to the metering injection pump 1 and the other end connected to the urea nozzle unit 62.
In the present embodiment, the metering injection pump 1 and the urea injection nozzle unit 62 are each provided with a through hole having a matching relationship with the urea injection pipe 61, and the urea injection pipe 61 is connected to the metering injection pump 1 and the urea injection nozzle unit 62 through the through hole.
In this embodiment, the urea injection pipe 61 may be made of a material inert to the urea solution, for example, a plastic material, and the urea injection pipe 61 may be connected to the urea injection nozzle assembly 62 and the metering injection pump 1, and the pipe length of the urea injection pipe 61 may be set according to actual requirements, and the distance between the metering injection pump 1 and the urea injection nozzle assembly 62 may be adjusted by different pipe lengths of the urea injection pipe 61, so as to adapt to the installation of the urea injection nozzle assembly 62 and the metering injection pump 1 in different diesel vehicles.
Optionally, the urea nozzle assembly 62 is provided with at least one urea nozzle 621.
In this embodiment, at least one urea nozzle 621 may be provided for injecting the urea solution according to actual requirements. For example, a different number of urea nozzles 621 may be provided according to the exhaust flow rate of different diesel engines, and specifically, when the exhaust flow rate of a diesel engine is small, one urea nozzle 621 may be provided to perform injection of the urea solution; when the exhaust flow of the diesel engine is large, two urea nozzles may be provided, so that the urea solution may be injected by using the two urea nozzles 621 at the same time, thereby expanding the one-time injection amount and the injection range of the urea solution. In addition, when a plurality of urea nozzles 621 are provided, if one of the urea nozzles 621 fails and fails to inject the urea solution, for example, if the urea nozzle 621 is clogged due to urea crystallization, other urea nozzles 621 capable of operating normally may be used to inject the urea solution, so as to reduce direct emission of pollutants in exhaust gas.
Optionally, the urea injection device further comprises: a urea liquid inlet filter screen 7;
the urea liquid inlet filter screen 7 is positioned at the outlet of one end of the urea liquid inlet pipe 3 close to the urea tank 5;
the urea liquid inlet filter screen 7 is connected with the outlet of the urea liquid inlet pipe 3.
In this embodiment, the exit of urea feed liquor pipe 3 connection urea jar 5's one end is provided with urea inlet filter screen 7, this urea inlet filter screen 7 and 3 exit linkage of this urea feed liquor pipe. Set up impurity in this urea inlet filter screen 7 can filter the urea solution, avoid impurity to lead to the crystallization in entering into measurement jet pump 1, cause the jam. This urea inlet filter screen 7 can be dismantled with this urea feed liquor pipe 3 and be connected, makes things convenient for the dismouting, for example when adnexed impurity is too much on this urea inlet filter screen 7, can dismantle this urea inlet filter screen 7 get off and wash and install again to improve urea injection apparatus's operating mass with rated load.
Optionally, the metering jet pump 1 is provided with a liquid outlet, a liquid inlet and a jet port;
this urea sprays subassembly 6, urea and returns liquid pipe 4 and urea feed liquor pipe 3 and is connected with this measurement jet pump 1 through this jet, inlet and liquid outlet respectively.
In this embodiment, the metering jet pump 1 may be provided with a jet orifice, a liquid inlet and a liquid outlet which extend out of a preset length, and the jet orifice, the liquid inlet and the liquid outlet are through holes; this inlet and this liquid outlet can be located measurement jet pump 1 and be close to on the one side outer container of urea jar 5, can make things convenient for the extraction of measurement jet pump 1 during operation urea solution in urea jar 5 more, can also reduce the pipe length that urea feed liquor pipe 3 and urea return liquid pipe 4 simultaneously to reduce material cost and save installation space. The injection port may be located at the bottom of the storage location for the pumped urea solution in the dosing pump 1 so that the urea solution pumped by the dosing pump 1 can be more transferred to the urea injection assembly 6. This urea sprays subassembly 6, urea feed liquor pipe 3 and urea return liquid pipe 4 and can dismantle the connection through injection mouth, inlet and the liquid outlet that stretch out respectively to can dismantle when measurement jet pump 1 breaks down conveniently and maintain and change, need not to change whole urea injection apparatus.
Optionally, the ultrasonic quality sensor 2 is provided with a probe;
the outlet of the urea return pipe 4 connected with one end of the urea tank 5 is positioned below the probe of the ultrasonic quality sensor 2.
In the present embodiment, the probe of the ultrasonic quality sensor 2, which is used mainly for transmitting ultrasonic waves and receiving reflected sound waves, is a part of the ultrasonic quality sensor 2 and can provide a function of detecting the concentration of the urea solution in the urea tank 5. Because the emitted ultrasonic waves are reflected to form a reflected echo when encountering impurities or interfaces, when bubbles or impurities are attached to the probe, the emitted ultrasonic waves encounter the impurities or the bubbles to reflect the echo, but the reflected echo is not actually required echo, so that the detection accuracy of the probe is influenced. For this reason, in the present embodiment, the outlet of the urea return pipe 4 connected to one end of the urea tank 5 is placed below the probe of the ultrasonic quality sensor 2, and when the urea injection device is operated, a part of the urea solution pumped by the metering and injecting pump 1 from the urea tank 5 flows back into the urea tank 5 through the urea return pipe 4 and flows out through the outlet of the urea return pipe 4. Impurities or bubbles on the probe of the ultrasonic quality sensor 2 can be washed away through the fluidity of the urea solution and the impact generated by the backflow of the urea solution, and attachments such as the impurities or the bubbles are more easily washed away as the position of the probe is closer to the outlet of the urea liquid return pipe 4, so that the detection precision of the probe is effectively improved.
Optionally, the ultrasonic quality sensor 2 is located at the bottom of the urea tank 5 and has a preset height with the bottom of the urea tank 5.
In this embodiment, the ultrasonic quality sensor 2 may be disposed at the bottom of the urea tank 5 in order to expand the detection range of the ultrasonic quality sensor 2, but since the outlet of the urea return pipe 4 is disposed below the ultrasonic quality sensor 2, the ultrasonic quality sensor 2 should have a preset height with respect to the bottom of the urea tank 5, and the preset height is set by itself according to actual needs, and is not limited herein. This ultrasonic wave quality sensor 2 can be fixed in 5 bottoms of urea tank through fixing device, improves the stability that ultrasonic wave quality sensor 2 placed for can not make this ultrasonic wave quality sensor 2 produce the displacement of keeping away from this export or be washed away when the urea solution of backward flow refluxes.
Optionally, one end of the urea liquid inlet pipe 3 close to the urea tank 5 is connected with the urea tank 5 through a pipe joint.
In this embodiment, coupling 8 can regard as the tie point that can the dismouting between urea feed liquor pipe 3 and the urea jar 5, uses coupling 8 to connect urea jar 5 and urea feed liquor pipe 3 not only can satisfy the convenient requirement of installing and removing, can also make urea return liquid pipe 4 and urea jar 5 between be connected firmly, can make the loss of pressure that causes littleer when measurement ejector pump 1 passes through urea feed liquor pipe 3 and extracts urea solution, the better extraction that carries out urea solution.
Optionally, the ultrasonic quality sensor 2 is connected to the metering jet pump 1 via a connecting tube 9.
In this embodiment, ultrasonic quality sensor 2 is used for surveying the concentration of the urea solution in urea tank 5, the control unit in measurement jet pump 1 is connected with ultrasonic quality sensor 2 through this connecting pipe 9, after the urea solution concentration that ultrasonic quality sensor 2 surveyed reached to predetermine the requirement, control unit control measurement jet pump 1 work, extract the urea solution in urea tank 5, this connecting pipe 9 makes the signal connection between this ultrasonic quality sensor 2 and measurement jet pump 1 not receive the influence of the outside environment of connecting pipe, improve ultrasonic quality sensor 2 and measurement jet pump 1 signal connection's stability.
It should be noted that the above-mentioned contents and specific embodiments are intended to demonstrate the practical application of the technical solutions provided in the present application, and should not be construed as limiting the scope of protection of the present application. Various modifications, equivalent substitutions, or improvements may be made by those skilled in the art within the spirit and principles of the present application. The protection scope of this application is subject to the appended claims.
Claims (9)
1. A urea injection device, comprising:
the device comprises a urea tank, a metering injection pump, a urea liquid inlet pipe, a urea liquid return pipe and a urea injection assembly;
the metering injection pump is connected with the urea injection assembly;
the urea tank is internally provided with an ultrasonic quality sensor and is used for storing urea solution;
the metering jet pump is connected with the urea tank through the urea liquid inlet pipe and the urea liquid return pipe loop;
the urea returns the liquid union coupling the export of the one end of urea jar is located ultrasonic wave quality sensor below, urea returns the liquid union coupling and is used for with urea solution among the measurement jet pump flows back, and the urea solution of backward flow is used for with adnexed bubble or impurity carry out the cleaning process on the ultrasonic wave quality sensor.
2. The urea injection apparatus of claim 1, wherein the urea injection assembly comprises: urea injection pipe and urea nozzle assembly;
and one end of the urea injection pipe is connected with the metering injection pump, and the other end of the urea injection pipe is connected with the urea nozzle component.
3. The urea injection apparatus of claim 2, wherein the urea nozzle assembly is provided with at least one urea nozzle.
4. The urea injection apparatus of claim 1, further comprising: a urea liquid inlet filter screen;
the urea liquid inlet filter screen is positioned at an outlet of one end of the urea liquid inlet pipe close to the urea tank;
the urea liquid inlet filter screen is connected with the outlet of the urea liquid inlet pipe.
5. The urea injection apparatus of claim 1, wherein the dosing pump is provided with a liquid outlet, a liquid inlet, and an injection port;
the urea injection assembly, the urea liquid inlet pipe and the urea liquid return pipe are respectively connected with the metering injection pump through the injection port, the liquid inlet and the liquid outlet.
6. Urea injection device according to any one of the claims 1-5, characterized in that the ultrasonic quality sensor is provided with a probe;
and the outlet of one end of the urea return pipe connected with the urea tank is positioned below the probe of the ultrasonic quality sensor.
7. The urea injection apparatus of any one of claims 1-5, wherein the ultrasonic quality sensor is located at a predetermined height from the bottom of the urea tank.
8. The urea injection apparatus of any one of claims 1-5, wherein the urea inlet pipe is connected to the urea tank at an end thereof near the urea tank by a pipe joint.
9. The urea injection apparatus of any one of claims 1-5, wherein the ultrasonic quality sensor is connected to the dosing jet pump by a connecting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153178.6A CN114046195A (en) | 2021-09-29 | 2021-09-29 | Urea injection device |
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| CN202111153178.6A CN114046195A (en) | 2021-09-29 | 2021-09-29 | Urea injection device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105189960A (en) * | 2013-05-07 | 2015-12-23 | 天纳克汽车经营有限公司 | Reductant sensor system |
| JP2016151489A (en) * | 2015-02-17 | 2016-08-22 | 日立建機株式会社 | Urea water concentration measurement device of construction machine |
| JP2017180203A (en) * | 2016-03-29 | 2017-10-05 | いすゞ自動車株式会社 | Urea water addition system for internal combustion engine |
| JP2017214907A (en) * | 2016-06-02 | 2017-12-07 | いすゞ自動車株式会社 | Urea water addition system for internal combustion engine |
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2021
- 2021-09-29 CN CN202111153178.6A patent/CN114046195A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105189960A (en) * | 2013-05-07 | 2015-12-23 | 天纳克汽车经营有限公司 | Reductant sensor system |
| JP2016151489A (en) * | 2015-02-17 | 2016-08-22 | 日立建機株式会社 | Urea water concentration measurement device of construction machine |
| JP2017180203A (en) * | 2016-03-29 | 2017-10-05 | いすゞ自動車株式会社 | Urea water addition system for internal combustion engine |
| JP2017214907A (en) * | 2016-06-02 | 2017-12-07 | いすゞ自動車株式会社 | Urea water addition system for internal combustion engine |
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Application publication date: 20220215 |