CN111058928A - SCR urea injection system trouble real time monitoring feedback equipment - Google Patents
SCR urea injection system trouble real time monitoring feedback equipment Download PDFInfo
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- CN111058928A CN111058928A CN201911305697.2A CN201911305697A CN111058928A CN 111058928 A CN111058928 A CN 111058928A CN 201911305697 A CN201911305697 A CN 201911305697A CN 111058928 A CN111058928 A CN 111058928A
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- Prior art keywords
- urea
- urea injection
- control module
- level sensor
- injection system
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 239000004202 carbamide Substances 0.000 title claims abstract description 154
- 238000002347 injection Methods 0.000 title claims abstract description 56
- 239000007924 injection Substances 0.000 title claims abstract description 56
- 238000012544 monitoring process Methods 0.000 title claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 239000000523 sample Substances 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 230000009471 action Effects 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012360 testing method Methods 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
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/10—Carbon or carbon oxides
-
- 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
- F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
-
- 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
- F01N2610/148—Arrangement of sensors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to monitoring feedback equipment, in particular to SCR urea injection system fault real-time monitoring feedback equipment. The technical problem to be solved is how to provide a SCR urea injection system fault real-time monitoring feedback device which can feed back the fault of an SCR system in time and can facilitate people to judge the fault position. A SCR urea injection system fault real-time monitoring feedback device comprises a control box, a display panel, a buzzer and the like; the upper side of the urea pump is fixedly connected with a control box. According to the invention, the SCR system can be monitored through the monitoring mechanism, and the detection result is fed back to people, so that the fault of the SCR system can be fed back in time, and the fault position can be conveniently judged by people, so that the maintenance of people can be facilitated, a large amount of time is saved, and the operation of the temperature sensor and the first liquid level sensor can be prevented from being influenced after urea is crystallized through the probe cleaning mechanism.
Description
Technical Field
The invention relates to monitoring feedback equipment, in particular to SCR urea injection system fault real-time monitoring feedback equipment.
Background
The SCR system is a selective catalytic reduction technology, is a treatment process aiming at the tail gas emission of diesel vehicles, reduces NOx in the tail gas into N2 and H20 through urea, and is widely applied to the post-treatment of the tail gas of the diesel engine, thereby reducing the pollution of the tail gas to the environment and achieving the purposes of energy conservation and emission reduction.
SCR system generally installs on the car, carries out the aftertreatment to automobile exhaust, because ambient temperature's change and maintenance conditions such as not in place lead to SCR system's part to damage, and SCR system can not in time feed back the problem that the part damaged, lead to the problem discovery untimely, cause exhaust emission not up to standard, secondly, people are difficult to accurate judgement fault location, lead to maintaining untimely, extravagant a large amount of time.
The device capable of feeding back the fault of the SCR system in time and facilitating people to judge the fault position is designed to solve the existing problems.
Disclosure of Invention
In order to overcome the problem that SCR system can not in time feed back the part and damage, lead to the problem discovery untimely, cause exhaust emissions not up to standard, and people are difficult to the shortcoming of accurate judgement fault location, the technical problem who solves: the SCR urea injection system fault real-time monitoring feedback equipment is capable of feeding back the fault of the SCR system in time and facilitating people to judge the fault position.
The technical implementation scheme of the invention is as follows: a kind of SCR urea injection system trouble monitors the feedback apparatus in real time, including the control box, it is fixed to the upside of urea pump; the display panel is provided with a buzzer, a first indicator light, a second indicator light and a third indicator light on the side surface; and the monitoring mechanism is arranged on the urea pump and is used for monitoring the fault of the equipment.
Furthermore, the intelligent control device also comprises a control module, and the buzzer, the first indicator light, the second indicator light and the third indicator light are electrically connected with the control module.
Further, monitoring mechanism is connected with two adapters including switching pipe, adapter, protective housing, temperature sensor and a level sensor on the urea pump, and one of them adapter is connected with the urea supply line, and another one adapter and urea injection union coupling all are connected with the switching pipe on two adapters, the embedded protective housing that is connected with on the switching pipe, embedded temperature sensor and a level sensor of installing on the protective housing, temperature sensor and a level sensor all pass through electric connection with control module.
Further, still including the clean mechanism of probe, the clean mechanism of probe is including guide pin bushing, guide arm, connecting plate, brush hair, sealing ring and first spring, and equal embedded guide pin bushing of installing on two protective housings, the guide pin bushing is located between temperature sensor and the first level sensor, it has the guide arm to slide to wear to connect in the guide pin bushing, around being equipped with first spring on the guide arm, the one end and the guide pin bushing of first spring are connected, the other end and the connecting plate of first spring are connected, the tip rigid coupling of guide arm has the connecting plate, it has two through-holes to open on the connecting plate, the through-hole inboard is provided with the brush hair, be connected with two sealing rings on the connecting plate, temperature sensor and first level sensor are located two sealing rings.
Further, still including shower nozzle protection machanism, shower nozzle protection machanism is connected with installation shell and stand pipe including installation shell, stand pipe, piston rod, connecting rod, visor and second spring, urea injection pipe's side, and the stand pipe is located the installation shell, be equipped with the piston rod in the stand pipe, the tip rigid coupling of piston rod has the connecting rod, the tip rigid coupling of connecting rod has the visor, the visor contacts with urea injection pipe, is connected with the second spring between connecting rod and the installation shell inner wall.
Further, including the backward flow mechanism, the backward flow mechanism is equipped with second level sensor, backwash pump, inlet tube, switching cover and fluid-discharge tube including second level sensor on the urea back flow, the backwash pump is installed at urea pump top, be connected with inlet tube and fluid-discharge tube on the backwash pump, the side of urea pump is connected with the switching cover, and the switching cover is connected with the urea back flow, switching cover and inlet tube intercommunication, backwash pump and control module pass through peripheral circuit and connect, and second level sensor and control module pass through electric connection.
Further, including switching power supply and power module in the control box, control module installs in the control box, and switching power supply is the equipment power supply, and switching power supply is last to have the power master switch through the line connection, and switching power supply and power module pass through electric connection, and control module and power module pass through electric connection, are connected with DS1302 clock circuit and 24C02 circuit on the control module.
Has the advantages that:
1. can monitor the SCR system through monitoring mechanism to give people with the testing result feedback, so, can in time feed back the trouble of SCR system, and can make things convenient for people to judge the fault location, thereby can make things convenient for people to maintain, saved a large amount of time.
2. The operation of the temperature sensor and the first liquid level sensor can be prevented from being influenced after urea is crystallized through the probe cleaning mechanism.
3. The urea injection pipe can be blocked by the spray head protection mechanism, so that the urea injection pipe is prevented from being corroded by acidic gas in the exhaust pipe.
4. Can inhale back urea case with remaining urea in the urea return line through return mechanism in, avoid urea to remain in the urea return line.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of the display structure of the present invention.
Fig. 3 is a schematic perspective view of a portion of the present invention.
Fig. 4 is a schematic perspective view of the monitoring mechanism of the present invention.
Fig. 5 is a schematic perspective view of the probe cleaning mechanism of the present invention.
Fig. 6 is a schematic perspective view of the nozzle protection mechanism according to the present invention.
Fig. 7 is a circuit block diagram of the present invention.
Fig. 8 is a schematic circuit diagram of the present invention.
Reference numerals: 1 urea pump, 2 urea injection pipes, 3 exhaust pipes, 4 urea supply pipes, 5 urea return pipes, 6 control boxes, 71 display panels, 72 buzzers, 73 first indicator lamps, 74 second indicator lamps, 75 third indicator lamps, 8 monitoring mechanisms, 81 adapter pipes, 82 adapters, 83 protective housings, 84 temperature sensors, 85 first liquid level sensors, 9 probe cleaning mechanisms, 91 guide sleeves, 92 guide rods, 93 connecting plates, 94 bristles, 95 sealing rings, 96 through holes, 97 first springs, 10 nozzle protection mechanisms, 101 mounting housings, 102 guide pipes, 103 piston rods, 104 connecting rods, 105 protective covers, 106 second springs, 11 return mechanisms, 111 second liquid level sensors, 112 return pumps, 113 water inlet pipes, 114 adapter sleeves and 115 liquid discharge pipes.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description, but the invention is not limited to the scope of protection and application.
First embodiment
A fault real-time monitoring feedback device of an SCR urea injection system is shown in figures 1-5 and comprises a control box 6, a display panel 71, a buzzer 72, a first indicator lamp 73, a second indicator lamp 74, a third indicator lamp 75 and a monitoring mechanism 8, wherein the control box 6 is installed at the top of a urea pump 1 through bolts, the buzzer 72, the first indicator lamp 73, the second indicator lamp 74 and the third indicator lamp 75 are arranged on the front side of the display panel 71, the first indicator lamp 73 is located among the buzzer 72, the second indicator lamp 74 and the third indicator lamp 75, and the monitoring mechanism 8 is installed on the urea pump 1.
The intelligent control device further comprises a control module, wherein the buzzer 72, the first indicator lamp 73, the second indicator lamp 74 and the third indicator lamp 75 are electrically connected with the control module.
The urea supply pipe 4 and the urea return pipe 5 are connected to a urea box, the display panel 71 is installed in an automobile, after the automobile is started, the urea pump 1 starts to work, the urea pump 1 sucks urea in the urea box into the urea injection pipe 2 through the urea supply pipe 4, the urea in the urea injection pipe 2 flows into the exhaust pipe 3, catalytic treatment is carried out on tail gas of a diesel engine, a power main switch is pressed by people to electrify the equipment, the monitoring mechanism 8 starts to work, the monitoring mechanism 8 can detect the temperature and the liquid level of the urea injection pipe 2 and the urea supply pipe 4, when the temperature of the urea injection pipe 2 detected by the monitoring mechanism 8 is higher than a rated value in the control module or the liquid level is lower than the rated value in the control module, the monitoring mechanism 8 sends a signal, the control module controls the first indicator lamp 73 to be turned on after receiving the signal to indicate that the urea injection pipe 2 has a fault, people can maintain urea injection pipe 2, urea injection pipe 2 maintains well after, the temperature and the liquid level of urea injection pipe 2 get back to normal value, first pilot lamp 73 extinguishes, when the temperature of urea supply pipe 4 that monitoring mechanism 8 detected is higher than the rated value in the control module or the liquid level is less than the rated value in the control module, monitoring mechanism 8 signals, control second pilot lamp 74 lights after the control module received signal, it shows that urea supply pipe 4 breaks down, people can maintain urea supply pipe 4, urea supply pipe 4 maintains well after, the temperature and the liquid level of urea supply pipe 4 get back to normal value, second pilot lamp 74 extinguishes. Therefore, the fault of the SCR system can be fed back in time, and people can conveniently judge the fault position, so that the SCR system can be conveniently maintained by people, and a large amount of time is saved. When the automobile is powered off, urea in the urea pump 1 flows back to the urea box through the urea return pipe 5, people press the power master switch again to power off the equipment, and the monitoring mechanism 8 stops working.
When equipment is powered on, the control module controls the temperature sensor 84 and the first liquid level sensor 85 to work, the temperature sensor 84 above the equipment can detect the temperature of the urea supply pipe 4, the first liquid level sensor 85 above the equipment can detect the liquid level in the urea supply pipe 4, the temperature sensor 84 below the equipment can detect the temperature of the urea injection pipe 2, and the first liquid level sensor 85 below the equipment can detect the liquid level in the urea injection pipe 2. When the temperature of the urea supply pipe 4 detected by the upper temperature sensor 84 is higher than a rated value in the control module, the upper temperature sensor 84 sends a signal, the control module receives the signal and controls the first indicator lamp 73 to be turned on, which indicates that the urea supply pipe 4 is in failure, people can maintain the urea supply pipe 4, after the urea supply pipe 4 is maintained, the temperature of the urea supply pipe 4 returns to a normal value, and the first indicator lamp 73 is turned off. When the first liquid level sensor 85 above detects that the liquid level in the urea supply pipe 4 is lower than the rated value in the control module, the first liquid level sensor 85 above sends a signal, the control module receives the signal and then controls the first indicator lamp 73 to light, which indicates that the urea supply pipe 4 breaks down, people can maintain the urea supply pipe 4, after the urea supply pipe 4 is maintained, the liquid level of the urea supply pipe 4 returns to the normal value, and the first indicator lamp 73 is turned off. When the temperature of the urea injection pipe 2 detected by the lower temperature sensor 84 is higher than a rated value in the control module, the lower temperature sensor 84 sends a signal, the control module receives the signal and controls the second indicator lamp 74 to light up, which indicates that the urea injection pipe 2 is in failure, people can maintain the urea injection pipe 2, after the urea injection pipe 2 is maintained, the temperature of the urea injection pipe 2 returns to a normal value, and the second indicator lamp 74 is turned off. When the first liquid level sensor 85 below detects that the liquid level in the urea injection pipe 2 is lower than the rated value in the control module, the first liquid level sensor 85 below sends a signal, the control module receives the signal and controls the second indicator lamp 74 to light, which indicates that the urea injection pipe 2 breaks down, people can maintain the urea injection pipe 2, after the urea injection pipe 2 is maintained, the liquid level of the urea injection pipe 2 returns to the normal value, and the second indicator lamp 74 is turned off. When the apparatus is powered down, the temperature sensor 84 and the first level sensor 85 stop operating.
Second embodiment
On the basis of the first embodiment, as shown in fig. 1, 4, 5 and 6, the probe cleaning mechanism 9 is further included, the probe cleaning mechanism 9 includes a guide sleeve 91, a guide rod 92, a connecting plate 93, bristles 94, a sealing ring 95 and a first spring 97, the guide sleeve 91 is embedded in the middle of the top of the upper protective shell 83, the guide sleeve 91 is also embedded in the middle of the right side of the lower protective shell 83, the guide sleeve 91 is located between the temperature sensor 84 and the first liquid level sensor 85, the guide rod 92 is slidably arranged in the guide sleeve 91, the first spring 97 is wound on the guide rod 92, one end of the first spring 97 is connected with the guide sleeve 91, the bottom end of the upper guide rod 92 is connected with the connecting plate 93, the left end of the lower guide rod 92 is also connected with the connecting plate 93, the other end of the first spring 97 is connected with the connecting plate 93, the connecting plate 93 is provided, the sealing rings 95 are connected to the left side and the right side of the top of the connecting plate 93 above, the sealing rings 95 are connected to the upper side and the lower side of the right side of the connecting plate 93 below, and the temperature sensor 84 and the first liquid level sensor 85 are located in the two sealing rings 95 respectively.
Still including shower nozzle protection machanism 10, shower nozzle protection machanism 10 is including installation shell 101, stand pipe 102, piston rod 103, connecting rod 104, visor 105 and second spring 106, urea injection pipe 2 right side sub-unit connection has installation shell 101 and stand pipe 102, stand pipe 102 is located installation shell 101, be equipped with piston rod 103 in the stand pipe 102, piston rod 103 right-hand member is connected with connecting rod 104, connecting rod 104 bottom is connected with visor 105, visor 105 contacts with urea injection pipe 2, be connected with second spring 106 between connecting rod 104 and the installation shell 101 inner wall.
Still including return mechanism 11, return mechanism 11 is including second level sensor 111, backwash pump 112, inlet tube 113, switching cover 114 and fluid-discharge tube 115, second level sensor 111 is installed through the bolt in 5 bottoms of urea back flow, backwash pump 112 is installed at 1 top of urea pump, there is inlet tube 113 return pump 112 bottom through threaded connection, there is fluid-discharge tube 115 on the backwash pump 112 right side through threaded connection, 1 right side of urea pump is connected with switching cover 114, switching cover 114 is connected with urea back flow 5, switching cover 114 communicates with inlet tube 113, backwash pump 112 and control module pass through peripheral circuit and connect, second level sensor 111 and control module pass through electric connection.
When urea flows into the urea supply pipe 4, the urea flows into the upper adapter pipe 81, the urea pushes the upper connecting plate 93 to move upwards, so that the upper sealing ring 95 and the upper bristles 94 are driven to move upwards, the upper temperature sensor 84 and the upper first liquid level sensor 85 are cleaned, the temperature sensor 84 and the upper first liquid level sensor 85 are prevented from being influenced by the urea after crystallization, the upper first spring 97 is compressed at the moment, when the urea stops flowing into the urea supply pipe 4, the upper connecting plate 93 is reset downwards under the action of the upper first spring 97, the upper sealing ring 95 and the upper bristles 94 are reset downwards, and the upper temperature sensor 84 and the upper first liquid level sensor 85 are cleaned again. When urea flows into the urea injection pipe 2, the urea flows into the adapter pipe 81 below, the urea pushes the connecting plate 93 below to move rightwards, so that the sealing ring 95 below and the bristles 94 below are driven to move rightwards, the temperature sensor 84 below and the first liquid level sensor 85 below are cleaned, the condition that the temperature sensor 84 below and the first liquid level sensor 85 below are influenced after urea is crystallized is avoided, the first spring 97 below is compressed at the moment, when the urea stops flowing into the urea injection pipe 2, the connecting plate 93 below resets leftwards under the action of the first spring 97 below, the sealing ring 95 below and the bristles 94 below reset leftwards, and the temperature sensor 84 below and the first liquid level sensor 85 below are cleaned again.
The protective cover 105 can block the urea injection pipe 2 to prevent acid gas in the exhaust pipe 3 from corroding the urea injection pipe 2, when urea flows into the urea injection pipe 2, the urea pushes the piston rod 103 to move rightwards, so that the connecting rod 104 is driven to move rightwards, the protective cover 105 moves rightwards along with the piston rod to open the urea injection pipe 2, therefore, the urea does not influence the flow of the urea into the exhaust pipe 3, and at the moment, the second spring 106 is compressed. When the urea stops in the urea injection pipe 2, the piston rod 103 loses thrust, and the connecting rod 104 moves leftwards under the action of the second spring 106, so that the protective cover 105 is driven to move leftwards to block the urea injection pipe 2 again.
People connect the liquid discharge pipe 115 to the urea tank, when the device is powered on, the control module controls the second liquid level sensor 111 to work, the second liquid level sensor 111 can check the liquid in the urea return pipe 5, when the automobile is powered off, the urea in the urea pump 1 flows back to the urea tank through the urea return pipe 5, when the second liquid level sensor 111 detects that the urea still remains in the urea return pipe 5, the second liquid level sensor 111 sends out a signal, the control module receives the signal and controls the third indicator light 75 to light up, the control module controls the buzzer 72 to sound, the control module controls the reflux pump 112 to work for 5 seconds, the reflux pump 112 sucks the urea remaining in the urea return pipe 5 into the liquid discharge pipe 115 through the water inlet pipe 113 and finally flows back into the urea tank to avoid the urea remaining in the urea return pipe 5, and after 5 seconds, the control module controls the reflux pump 112 to stop working, meanwhile, the control module controls the third indicator light 75 to be turned off, and simultaneously controls the buzzer 72 not to sound.
As shown in fig. 7-8, the control box 6 includes a switching power supply and a power supply module, the control module is installed in the control box 6, the switching power supply supplies power to the device, the switching power supply is connected with a power main switch through a line, the switching power supply is electrically connected with the power supply module, the control module is electrically connected with the power supply module, and the control module is connected with a DS1302 clock circuit and a 24C02 circuit.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A SCR urea injection system trouble real time monitoring feedback equipment, characterized by includes:
a control box (6) which is fixedly connected to the upper side of the urea pump (1);
the display device comprises a display panel (71), wherein a buzzer (72), a first indicator lamp (73), a second indicator lamp (74) and a third indicator lamp (75) are arranged on the side surface of the display panel (71);
and the monitoring mechanism (8) is arranged on the urea pump (1), and the monitoring mechanism (8) is used for monitoring the fault of the equipment.
2. The SCR urea injection system fault real-time monitoring feedback device of claim 1, wherein: the intelligent control device is characterized by further comprising a control module, wherein the buzzer (72), the first indicator lamp (73), the second indicator lamp (74) and the third indicator lamp (75) are electrically connected with the control module.
3. The SCR urea injection system fault real-time monitoring feedback device of claim 2, wherein: monitoring mechanism (8) are connected with two adapter (82) including adapter (81), adapter (82), protective housing (83), temperature sensor (84) and first level sensor (85) on urea pump (1), one of them adapter (82) is connected with urea supply pipe (4), and another one adapter (82) is connected with urea injection pipe (2), all is connected with adapter (81) on two adapter (82), embedded protective housing (83) that is connected with on adapter (81), embedded temperature sensor (84) and first level sensor (85) of installing on protective housing (83), and temperature sensor (84) and first level sensor (85) all pass through electric connection with control module.
4. The SCR urea injection system fault real-time monitoring feedback device of claim 3, wherein: the probe cleaning mechanism (9) comprises a guide sleeve (91), a guide rod (92), a connecting plate (93), bristles (94), sealing rings (95) and first springs (97), the guide sleeve (91) is embedded in each of two protective shells (83), the guide sleeve (91) is located between a temperature sensor (84) and a first liquid level sensor (85), the guide rod (92) is connected in the guide sleeve (91) in a sliding and penetrating mode, the first spring (97) is wound on the guide rod (92), one end of the first spring (97) is connected with the guide sleeve (91), the other end of the first spring (97) is connected with the connecting plate (93), the connecting plate (93) is fixedly connected to the end portion of the guide rod (92), the connecting plate (93) is provided with two through holes (96), the bristles (94) are arranged on the inner side of each through hole (96), the connecting plate (93) is connected with the two sealing rings (95), the temperature sensor (84) and the first liquid level sensor (85) are respectively positioned in the two sealing rings (95).
5. The SCR urea injection system fault real-time monitoring feedback device of claim 4, wherein: still including shower nozzle protection machanism (10), shower nozzle protection machanism (10) are connected with installation shell (101) and stand pipe (102) including installation shell (101), stand pipe (102), piston rod (103), connecting rod (104), visor (105) and second spring (106), the side of urea injection pipe (2), and stand pipe (102) are located installation shell (101), be equipped with piston rod (103) in stand pipe (102), the tip rigid coupling of piston rod (103) has connecting rod (104), the tip rigid coupling of connecting rod (104) has visor (105), visor (105) and urea injection pipe (2) contact are connected with second spring (106) between connecting rod (104) and installation shell (101) inner wall.
6. The SCR urea injection system fault real-time monitoring feedback device of claim 5, wherein: still including return mechanism (11), return mechanism (11) are equipped with second level sensor (111) including second level sensor (111), backwash pump (112), inlet tube (113), switching cover (114) and fluid-discharge tube (115) on urea back flow (5), and backwash pump (112) are installed at urea pump (1) top, be connected with inlet tube (113) and fluid-discharge tube (115) on backwash pump (112), the side of urea pump (1) is connected with switching cover (114), and switching cover (114) are connected with urea back flow (5), switching cover (114) and inlet tube (113) intercommunication, backwash pump (112) and control module pass through peripheral circuit and connect, and second level sensor (111) and control module pass through electric connection.
7. The SCR urea injection system fault real-time monitoring feedback device of claim 6, wherein: including switching power supply and power module in control box (6), control module installs in control box (6), and switching power supply is the equipment power supply, and switching power supply is last to have a power master switch through the line connection, and switching power supply and power module pass through electric connection, and control module and power module pass through electric connection, are connected with DS1302 clock circuit and 24C02 circuit on the control module.
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| CN112903014A (en) * | 2021-01-20 | 2021-06-04 | 东风商用车有限公司 | Urea quality liquid level temperature sensor structure and maintenance method |
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