CN111608769A - Motor vehicle three-way catalytic converter with ultrasonic tail gas decomposition function - Google Patents
Motor vehicle three-way catalytic converter with ultrasonic tail gas decomposition function Download PDFInfo
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- CN111608769A CN111608769A CN201910134671.XA CN201910134671A CN111608769A CN 111608769 A CN111608769 A CN 111608769A CN 201910134671 A CN201910134671 A CN 201910134671A CN 111608769 A CN111608769 A CN 111608769A
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- metal filter
- ultrasonic
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
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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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
-
- 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
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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
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/12—Hydrocarbons
-
- 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
- F01N2570/14—Nitrogen 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
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to a motor vehicle three-way catalytic converter with an ultrasonic tail gas decomposition function, which comprises a metal shell, a ceramic carrier, a high-temperature-resistant metal filter screen and an ultrasonic transducer, wherein the high-temperature-resistant metal filter screen is provided with a plurality of meshes, the high-temperature-resistant metal filter screen is arranged in the metal shell positioned in front of the air inlet end of the ceramic carrier, the ultrasonic transducer is arranged on the outer surface of the metal shell, and a vibrator end arranged on the ultrasonic transducer is connected with the high-temperature-resistant metal filter screen so as to drive the high-temperature-resistant metal filter screen to vibrate in a high. Utilize ultrasonic transducer drive high temperature resistant metal filter screen, make high temperature resistant metal filter screen do ultrasonic high frequency vibration, form ultrasonic high frequency cutting to the tail gas that passes high temperature resistant metal filter screen, make the impurity of smuggleing secretly in the tail gas be intercepted or cut up and decompose more tiny particulate matter, reduce substantially or avoid the jam of impurity smuggleing secretly in the tail gas to ceramic carrier mesh, make the extension ceramic carrier to tail gas decomposition ability, make it keep good operating mode state all the time.
Description
Technical Field
The invention relates to the field of motor vehicle parts, in particular to a three-way catalytic converter for a motor vehicle or an internal combustion engine.
Background
The three-way catalyst is installed in the exhaust system of motor vehicle or internal combustion engine and can convert the harmful gas exhausted from automobile tail gas into harmless carbon dioxide, water and nitrogen gas through oxidation and reduction. When high-temperature automobile exhaust passes through the three-way catalyst, the ceramic carrier coated with the catalyst coating in the three-way catalyst enhances the activity of three gases of CO, HC and NOx to promote the three gases to perform certain oxidation-reduction chemical reaction, wherein the CO is oxidized into colorless and nontoxic carbon dioxide gas at high temperature, the HC compound is oxidized into water (H20) and carbon dioxide at high temperature, the NOx is reduced into nitrogen and oxygen, and the three harmful gases are changed into harmless gases, so that the automobile exhaust is purified.
After the three-way catalyst arranged on an exhaust system of a motor vehicle or an internal combustion engine is used for a period of time, impurities (such as petroleum colloid in fuel oil, insufficiently combusted fuel oil and the like) left by tail gas and reactants left after oxidation-reduction reaction are accumulated on meshes of a ceramic carrier, and after the time, the meshes of the ceramic carrier are inevitably blocked, so that the three-way catalyst cannot normally work, the tail gas of the engine or the internal combustion engine cannot be normally discharged, the working condition of the engine or the internal combustion engine is influenced, and the rare metal compound catalyst attached to the ceramic carrier is also covered by the tail gas impurities and the reactants, and the tail gas purification effect of the rare metal compound catalyst is influenced. Therefore, the conventional three-way catalyst must be periodically checked and replaced. However, the frequent replacement of the three-way catalyst greatly increases the use cost of consumers and also does not accord with the environmental protection idea of recycling.
At present, a three-way catalyst is generally cleaned regularly to prolong the service life of the three-way catalyst. At present, the three-way catalyst cleaning method mainly comprises two methods: one is that the special cleaning agent is input from the air inlet pipe of the motor vehicle engine, the engine runs in idle speed until the whole bottle of cleaning agent is used up, and in the cleaning process, the sundries and the reactant on the three-way catalytic converter are discharged from the air outlet pipe, so as to achieve the purpose of cleaning. The cleaning mode only has a certain relieving effect on slightly blocked three-way catalytic converters, cannot achieve the effect of thorough cleaning, and can cause engine faults due to slight misoperation. Alternatively, the three-way catalyst is detached from the motor vehicle and deep-cleaned with a specialized cleaning apparatus. The cleaning mode is thorough in cleaning, but needs very professional technicians to operate, and is time-consuming and high in maintenance cost in complicated and complicated dismounting and mounting processes.
In 2019, the national environmental protection policy implements a more severe national six-emission standard on the emission of motor vehicle exhaust, as a motor vehicle manufacturer, the working condition principle of an engine is very mature, and under the condition that no large improvement space exists, besides the engine is made into a small engine displacement, the weight of the whole vehicle is reduced, and the oil consumption of the motor vehicle is reduced, in order to achieve and meet the severe national six-emission standard, only the mesh density of a ceramic carrier in a three-way catalyst can be increased, the filter meshes are made finer, so that when the motor vehicle exhaust passes through the ceramic carrier, more exhaust is in contact with the surface of the ceramic carrier to generate chemical reaction, and the tail gas emission of the motor vehicle is cleaner, and the more severe national six-emission standard is achieved and met. However, the higher the mesh density of the ceramic carrier of the three-way catalyst, the smaller the mesh, meaning the higher the frequency with which the mesh is clogged. Therefore, the maintenance frequency of the three-way catalyst of the favorite vehicle is more frequent for the consumers, and the daily maintenance cost is higher and off-spectrum.
Therefore, the applicant believes that how to improve the purification capacity of the three-way catalyst and reduce the maintenance frequency and the maintenance cost of the three-way catalyst is still the direction of improvement and development of three-way catalyst products under the current severe environmental protection requirements.
Disclosure of Invention
The invention aims to solve the problems and the defects and provides a motor vehicle three-way catalyst with an ultrasonic tail gas decomposition function, the three-way catalytic converter utilizes the ultrasonic transducer to drive the high-temperature resistant metal filter screen to make the high-temperature resistant metal filter screen vibrate in an ultrasonic high-frequency manner, the ultrasonic high-frequency cutting is formed on the tail gas passing through the high-temperature-resistant metal filter screen, so that impurities carried in the tail gas are intercepted or chopped to decompose finer particles, the blockage of the impurities carried in the tail gas on meshes of a ceramic carrier is greatly reduced or avoided, the tail gas decomposition capacity of the ceramic carrier is prolonged, the catalyst carrier is always kept in a good working condition state, the maintenance frequency of the three-way catalyst is reduced, the daily maintenance cost of the three-way catalyst is reduced, the service life of the three-way catalyst is prolonged, and the ultrasonic high-frequency cutting device has the advantages of being simple in structure, easy to implement, simple, reliable and durable.
The technical scheme of the invention is realized as follows: the utility model provides a motor vehicle three way catalyst converter of ultrasonic wave tail gas decomposition function, includes the metal casing of taking the inlet port and giving vent to anger the port, installs the ceramic carrier that the coating in the metal casing inner chamber has the catalyst coating, its characterized in that still includes high temperature resistant metal filter screen, ultrasonic transducer, wherein evenly be provided with a plurality of meshs on the high temperature resistant metal filter screen, this high temperature resistant metal filter screen sets up in the metal casing that is located ceramic carrier inlet end front, ultrasonic transducer installs in the metal casing is apparent, and the last oscillator end that is equipped with of this ultrasonic transducer is connected with high temperature resistant metal filter screen to the drive high temperature resistant metal filter screen does high frequency ultrasonic vibration.
In order to further improve the cleaning treatment capacity and the cleaning effect of the automobile exhaust, the automobile exhaust cleaning device further comprises a urea storage container, wherein a urea injection nozzle for injecting urea towards the high-temperature-resistant metal filter screen is further arranged on the metal shell, and the urea injection nozzle is connected with the urea storage container through a pipeline.
In order to conveniently and regularly clean away impurities or dirt accumulated on the bottom edge of the high-temperature-resistant metal filter screen, a drain outlet is further formed in the bottom of the metal shell, and an electromagnetic switch valve is connected to the drain outlet.
In order to enable the invention to be flexibly arranged with the tail gas treatment capability of the three-way catalyst according to the engine displacement of the motor vehicle in practical application, the metal shell comprises an air inlet port, an air outlet port and a plurality of shell ring shells, the shell ring shells are assembled together in a flange connection structure mode, the air inlet port and the shell ring shells are assembled together in a flange connection structure mode, and the air outlet port and the shell ring shells are assembled together in a flange connection structure mode; the high-temperature resistant metal filter screen and the ceramic carrier are respectively arranged in each shell of the shell section in sequence.
The invention has the beneficial effects that: the invention adopts the structure that the ultrasonic transducer and the high-temperature resistant metal filter screen are arranged at the front end of the air inlet of the ceramic carrier in the metal shell, the high-temperature resistant metal filter screen is driven to vibrate in an ultrasonic high frequency mode by utilizing the ultrasonic high-frequency vibration generated when the ultrasonic transducer works, the ultrasonic high-frequency cutting device has the advantages that the ultrasonic high-frequency cutting is formed on the tail gas passing through the high-temperature-resistant metal filter screen, impurities carried in the tail gas are intercepted or chopped to decompose finer particles, the blockage of the impurities carried in the tail gas on meshes of a ceramic carrier is greatly reduced or avoided, the tail gas decomposition capacity of the ceramic carrier is prolonged, the catalyst carrier is enabled to be always in a good working condition state, the maintenance frequency of the three-way catalyst is reduced, the daily maintenance cost of the three-way catalyst is reduced, the service life of the three-way catalyst is prolonged, and the ultrasonic high-frequency cutting device has the advantages of being simple in structure, easy to achieve, simple.
Drawings
Fig. 1 is a schematic perspective view of a first embodiment of the present invention.
Fig. 2 is a schematic view of an anatomical structure according to a first embodiment of the invention.
Fig. 3 is a second schematic structural diagram of the first embodiment of the present invention in an anatomical state.
FIG. 4 is a schematic sectional view of the arrangement of the refractory metal screen and the ceramic carrier of the present invention.
Fig. 5 is a schematic perspective view of a second embodiment of the present invention.
Fig. 6 is a schematic structural view of a second embodiment of the present invention in a cut-away state.
Detailed Description
As shown in fig. 1 to 4, the three-way catalytic converter for a motor vehicle with an ultrasonic tail gas decomposition function according to the present invention includes a metal casing 1 having an inlet port 11 and an outlet port 12, and a ceramic carrier 2 disposed in an inner cavity of the metal casing 1 and coated with a catalyst coating. In order to achieve the purpose of the invention, the invention also comprises a high-temperature resistant metal filter screen 4 and an ultrasonic transducer 5, wherein a plurality of meshes 41 are uniformly arranged on the high-temperature resistant metal filter screen 4, and the aperture of each mesh 41 is the same as that of the mesh on the ceramic carrier 2 or slightly smaller than that of the mesh on the ceramic carrier 2, so that the better blocking and cutting effects are achieved. As shown in fig. 2 or fig. 3, the high temperature resistant metal screen 4 is disposed in the metal casing 1 in front of the air inlet end of the ceramic carrier 2, the ultrasonic transducer 5 is mounted on the outer surface of the metal casing 1, and the vibrator end disposed on the ultrasonic transducer 5 is connected to the high temperature resistant metal screen 4 to drive the high temperature resistant metal screen 4 to perform high frequency ultrasonic vibration. In specific implementation, generally, an annular groove 20 for limiting is correspondingly arranged in the inner cavity of the metal shell 1, so that the high-temperature-resistant metal screen 4 and the ceramic carrier 2 can be limited and embedded in the inner cavity of the metal shell 1, and meanwhile, the assembly of the high-temperature-resistant metal screen 4 transversely standing in the inner cavity of the metal shell 1 is facilitated. In addition, as shown in fig. 4, the outer ring of the high temperature resistant metal screen 4 is further covered with a ring of asbestos washer or ceramic fiber washer 42, and by using the asbestos washer or ceramic fiber washer 42, on one hand, the high temperature resistant metal screen 4 is not in hard contact with the ring groove 20, and has a certain extensibility, so that the high temperature resistant metal screen 4 generates ultrasonic high-frequency vibration when the ultrasonic transducer 5 drives the high temperature resistant metal screen 4; on the other hand, the sealing device also has a certain sealing and blocking effect.
In order to further improve the cleaning treatment capacity and the cleaning effect of the invention on the motor vehicle exhaust, as shown in fig. 1, the invention further comprises a urea storage container 6, the metal shell 1 is further provided with a urea injection nozzle 7 for injecting urea towards the high temperature resistant metal filter screen 4, the urea injection nozzle 7 is connected with the urea storage container 6 through a pipeline, and the urea injection nozzle 7 is further connected with an electromagnetic switch valve 9 so as to conveniently control the on-off of the urea injection nozzle 7. Through the design of urea injection nozzle 7, make the vehicle driving in-process, can regularly automatically controlled spray urea to high temperature resistant metal filter 4, erode high temperature resistant metal filter 4, ceramic carrier 2 to promote the clean effect of high temperature resistant metal filter 4, ceramic carrier 2 to the processing of tail gas. In addition, an electric liquid pumping pump can be additionally arranged in the urea storage container 6 to play a role in pressurization.
In addition, as shown in fig. 1 to 3, a cleaning liquid spray nozzle 71 for spraying a cleaning liquid toward the high temperature resistant metal screen 4 is further provided on the metal casing 1, and an electromagnetic switch valve 9 is further connected to the cleaning liquid spray nozzle 71 to facilitate on/off control of the cleaning liquid spray nozzle 71. The cleaning liquid injection nozzle 71 is connected with an independent liquid storage container 72 through a pipeline, and people can add special cleaning liquid for the three-way catalyst into the liquid storage container 72, inject the special cleaning liquid into the high-temperature-resistant metal filter screen 4 through the cleaning liquid injection nozzle 71, and regularly clean and maintain the high-temperature-resistant metal filter screen 4 and the ceramic carrier 2. In addition, a liquid-pumping electric pump can be added in the liquid storage container 72 to perform a pressurization function.
In order to discharge impurities accumulated at the bottom of the cavity in the metal shell 1, as shown in fig. 1 and 2, a sewage draining outlet 8 is further formed at the bottom of the metal shell 1, an electromagnetic switch valve 9 is connected to the sewage draining outlet 8, and the electromagnetic switch valve 9 is used for controlling the opening and closing of the sewage draining outlet 8. For example, after the cleaning solution is injected through the cleaning solution injection nozzle 71 to clean the three-way catalyst, the drain outlet 8 can be opened to discharge the cleaning solution and the impurities.
As shown in fig. 1 and 2, a drain outlet 8 is further disposed on the bottom surface of the metal casing 1 at the position of the high temperature resistant metal screen 4, so as to facilitate discharge of impurities and dirt accumulated on the bottom edge of the high temperature resistant metal screen 4 during operation. The sewage draining outlet 8 is connected with a pipeline 81, and the electromagnetic switch valve 9 is connected in series on the pipeline 81. When a plurality of sewage discharging ports 8 are designed, the sewage discharging ports 8 are connected in series through a pipeline 81, and the opening or closing of the pipeline is controlled in a centralized manner through an electromagnetic switch valve 9.
As shown in fig. 1 and 2, the inlet port 11 and the outlet port 12 are also connected in series with an electromagnetic opening/closing valve 9. Through the design of the electromagnetic switch valves 9 at the two positions, when the three-way catalytic converter is sprayed and cleaned, the two ends can be closed, then the cleaning solution is filled into the inner cavity of the metal shell 1 through the cleaning solution spraying nozzle 71 and is soaked and cleaned, the ultrasonic transducer 5 is started at the same time, the high-temperature-resistant metal filter screen 4 generates high-frequency ultrasonic vibration, the vibration cleaning solution continuously generates bubbles, the explosion of the bubbles is utilized to wash the high-temperature-resistant metal filter screen 4, the ceramic carrier 2 and the inner cavity wall of the metal shell 1, the purpose of cleaning the three-way catalytic converter through ultrasonic soaking is achieved under the condition of no disassembly, and the maintenance of the whole three-way catalytic converter is simpler and more convenient. After cleaning, the electromagnetic switch valve 9 of the sewage outlet 8 can be opened to drain sewage.
In order to further improve the cutting and decomposing effect of the high temperature resistant metal filter screens 4 of the present invention on the exhaust gas passing through, as shown in fig. 2 and fig. 3, at least two groups of high temperature resistant metal filter screens 4 are further disposed in the metal shell 1 in front of the air inlet end of the ceramic carrier 2, and the outer surface of the metal shell 1 is correspondingly provided with ultrasonic transducers 5 connected to the high temperature resistant metal filter screens 4. Through the repeated cutting decomposition of the tail gas passing through the multiple groups of high-temperature-resistant metal filter screens 4, impurities carried in the tail gas are effectively decomposed and cut, or the impurities are effectively intercepted, so that the tail gas after ultrasonic cutting treatment can better contact with the ceramic carrier 2 and have chemical reaction when passing through the ceramic carrier 2, and the meshes of the ceramic carrier 2 are not blocked, so that the service life of the ceramic carrier 2 is better prolonged.
As shown in fig. 1 and 2, a mounting base 10 is further provided on a side surface of the metal casing 1, the mounting base 10 is provided with a mounting hole 101 for the ultrasonic transducer to extend into and mount, the ultrasonic transducer 5 is fixedly mounted in the mounting hole 101, and a vibrator of the ultrasonic transducer 5 penetrates through the metal casing 1 and then is connected to the high temperature resistant metal screen 4. Specifically, as shown in fig. 3, the mounting base 10 includes a fixed base 102 fixed on the metal casing 1 and a movable cover base 103 detachably mounted on the fixed base 102, the mounting hole 101 is correspondingly provided with the fixed base 102 and the movable cover base 103, a vibrator end of the ultrasonic transducer 5 passes through the mounting hole 101 on the fixed base 102 and is connected with the high temperature resistant metal filter screen 4 in the metal casing 1, so as to transmit high frequency vibration energy to the high temperature resistant metal filter screen 4, a mounting end of the ultrasonic transducer 5 is fixed in the mounting hole 101 of the movable cover base 103, and an electrode connecting end provided on the mounting end of the ultrasonic transducer 5 also passes through a wire hole provided on the movable cover base 103, so as to obtain electric energy required by operation.
On the basis of the principle of the structural scheme, in order to flexibly arrange the tail gas treatment capacity of the three-way catalyst according to the engine displacement of the motor vehicle in practical application, the invention also designs an embodiment that the metal shell 1 is decomposed into a plurality of sections, and the high-temperature resistant metal filter screen 4 and the ceramic carrier 2 are distributed in each section of the cylinder shell. Specifically, as shown in fig. 5 and 6, the metal shell 1 includes an air inlet port 11, an air outlet port 12, and a plurality of shell segments 13, where the shell segments 13 are assembled together in a flange connection structure, the air inlet port 11 and the shell segments 13 are assembled together in a flange connection structure, and the air outlet port 12 and the shell segments 13 are assembled together in a flange connection structure; the high-temperature resistant metal filter screen 4 and the ceramic carrier 2 are respectively and sequentially arranged in each shell section shell 13. Ceramic fibre gaskets 30 are also provided between the flange connections to provide a sealing function.
Under the thought of the foregoing technical solution, the ultrasonic transducer 5 may be disposed outside the metal casing 1 to drive the high temperature resistant metal screen 4 to vibrate ultrasonically at high frequency, i.e., the foregoing embodiment. In addition, the ultrasonic transducer 5 may be directly disposed on the high temperature resistant metal screen 4 in the metal housing 1, and the high temperature resistant metal screen 4 may be directly vibrated at high frequency by ultrasonic, which is an embodiment in which the ultrasonic transducer 5 is built. When the ultrasonic transducer 5 is directly arranged on the high-temperature-resistant metal filter screen 4, the outer surface of the ultrasonic transducer 5 must be coated with a high-hardness high-temperature-resistant heat-insulating material to prevent the ultrasonic transducer from being burnt by high-temperature tail gas. For example, the ultrasonic transducer 5 is covered with a ceramic fiber heat insulating material layer, and then the ceramic fiber heat insulating material layer is covered with a high temperature resistant metal material layer.
Claims (10)
1. The utility model provides a motor vehicle three way catalyst converter of ultrasonic wave tail gas decomposition function, includes metal casing (1) of taking inlet port (11) and outlet port (12), installs ceramic carrier (2) that the coating in metal casing (1) inner chamber has the catalyst coating, its characterized in that: still including high temperature resistant metal filter screen (4), ultrasonic transducer (5), wherein evenly be provided with a plurality of meshs (41) on high temperature resistant metal filter screen (4), this high temperature resistant metal filter screen (4) set up in metal casing (1) that is located ceramic carrier (2) inlet end in front, ultrasonic transducer (5) are installed in metal casing (1) externally, and the oscillator end that is equipped with on this ultrasonic transducer (5) is connected with high temperature resistant metal filter screen (4) to the high frequency ultrasonic vibration is done to drive high temperature resistant metal filter screen (4).
2. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 1, characterized in that: still include urea and store container (6), still be equipped with on metal casing (1) and spray urea injection nozzle (7) towards high temperature resistant metal filter screen (4) injection urea, this urea injection nozzle (7) are connected with urea storage container (6) through the pipeline.
3. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 1, characterized in that: still be equipped with on metal casing (1) towards high temperature resistant metal filter screen (4) the cleaning solution injection nozzle (71) of injection cleaning solution.
4. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 1, characterized in that: the bottom of the metal shell (1) is also provided with a drain outlet (8), and the drain outlet (8) is connected with an electromagnetic switch valve (9).
5. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 4, characterized in that: the bottom surface of the metal shell (1) at the position of the high-temperature-resistant metal filter screen (4) is also provided with a drain outlet (8), the drain outlet (8) is connected with a pipeline (81), and the pipeline (81) is connected with an electromagnetic switch valve (9) in series.
6. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 1, characterized in that: at least two groups of high-temperature-resistant metal filter screens (4) are further arranged in front of the air inlet end of the ceramic carrier (2) in the metal shell (1), and ultrasonic transducers (5) connected with the high-temperature-resistant metal filter screens (4) are correspondingly arranged on the outer surface of the metal shell (1).
7. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 6, characterized in that: the side of the metal shell (1) is also provided with an installation base (10), the installation base (10) is provided with an installation hole (101) for the ultrasonic transducer to extend into and install, the ultrasonic transducer (5) is fixedly installed in the installation hole (101), and a vibrator of the ultrasonic transducer (5) penetrates through the metal shell (1) and then is connected with the high-temperature-resistant metal filter screen (4).
8. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 1, characterized in that: the metal shell (1) comprises an air inlet port (11), an air outlet port (12) and a plurality of shell ring shells (13), wherein the shell ring shells (13) are assembled together in a flange connection structure mode, the air inlet port (11) and the shell ring shells (13) are assembled together in a flange connection structure mode, and the air outlet port (12) and the shell ring shells (13) are assembled together in a flange connection structure mode; the high-temperature resistant metal filter screen (4) and the ceramic carrier (2) are respectively and sequentially arranged in each shell section shell (13).
9. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 1, characterized in that: the air inlet port (11) and the air outlet port (12) are respectively connected with an electromagnetic switch valve (9) in series.
10. The ultrasonic motor vehicle three-way catalyst with the exhaust gas decomposition function according to claim 1, characterized in that: the high-temperature resistant metal filter screen (4) is further coated with a ring of asbestos washer or ceramic fiber washer (42).
Priority Applications (1)
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| CN201910134671.XA CN111608769A (en) | 2019-02-23 | 2019-02-23 | Motor vehicle three-way catalytic converter with ultrasonic tail gas decomposition function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910134671.XA CN111608769A (en) | 2019-02-23 | 2019-02-23 | Motor vehicle three-way catalytic converter with ultrasonic tail gas decomposition function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565607A (en) * | 2021-08-31 | 2021-10-29 | 吉林大学 | Anti-blocking structure of three-way catalytic converter |
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