CN106948913A - A kind of exhaust gas processing device and blast pipe for being convenient to clean urea crystals thing - Google Patents

A kind of exhaust gas processing device and blast pipe for being convenient to clean urea crystals thing Download PDF

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Publication number
CN106948913A
CN106948913A CN201710186827.XA CN201710186827A CN106948913A CN 106948913 A CN106948913 A CN 106948913A CN 201710186827 A CN201710186827 A CN 201710186827A CN 106948913 A CN106948913 A CN 106948913A
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CN
China
Prior art keywords
screw thread
inner tube
pipe assembly
exhaust gas
processing device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710186827.XA
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Chinese (zh)
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CN106948913B (en
Inventor
赵文仲
李龙超
穆立侠
张雪林
刘芯娟
滕建耐
许涛
候亦波
周涛
宁科亮
常耀红
业德明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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Publication date
Application filed by Anhui Jianghuai Automobile Group Corp filed Critical Anhui Jianghuai Automobile Group Corp
Priority to CN201710186827.XA priority Critical patent/CN106948913B/en
Publication of CN106948913A publication Critical patent/CN106948913A/en
Application granted granted Critical
Publication of CN106948913B publication Critical patent/CN106948913B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • 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
    • F01N3/005—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for draining or otherwise eliminating condensates or moisture accumulating in the 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1486—Means to prevent the substance from freezing

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  • 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 discloses a kind of exhaust gas processing device and blast pipe for being convenient to clean urea crystals thing, wherein, including mixing pipe assembly and two sealing pipe assemblies；Two sealing pipe assemblies are separately mounted to mix the two ends of pipe assembly；Mix pipe assembly and be provided with urea nozzle mounting hole；Sealing pipe assembly includes the first screw thread outer tube, screw thread inner tube and the second screw thread outer tube, there is external thread structure on the periphery at the two ends of screw thread inner tube, the first end of screw thread inner tube has opening, and the second end seal of screw thread inner tube is closed, and the periphery at the second end of screw thread inner tube is provided with multiple through holes；The first end of first screw thread outer tube is threadedly coupled with the first end of screw thread inner tube, the first end of second screw thread outer tube is threadedly coupled with the second end of screw thread inner tube, the internal diameter of the first end of second screw thread outer tube is less than the internal diameter at the second end, and the second end of the second screw thread outer tube is provided with baffle ring；The bottom of mixing pipe assembly is provided with dewatering outlet, dewatering outlet and is detachably provided with drain plug.Urea crystals thing can quickly be cleared up.

Description

A kind of exhaust gas processing device and blast pipe for being convenient to clean urea crystals thing
Technical field
The present invention relates to motor vehicle emission technical field, more particularly to a kind of vent gas treatment dress for being convenient to clean urea crystals thing Put and blast pipe.
Background technology
SCR technology route is one of mainstream technology route that heavy-duty diesel vehicle realizes the discharge standard of state more than IV.Its principle It is that urea is sprayed into blast pipe, pyrolysis and hydrolysis generation NH occur for urea3, NH3With the NO in exhaustXGeneration redox is anti- Should, generate N2And H2O, so as to reach reduction NOXThe purpose of discharge.The most common failure mode of SCR technology route is urea knot It is brilliant.Its principle generation HNCO (isocyanic acid) that is urea in pyrolysis, HNCO may occur side reaction generation cyanuric acid- (HNCO)3, and cyanuric acid-(HNCO)3It is exactly the main component of urea crystals thing.After urea crystals, crystal can be carried out rapidly Accumulation, blocks the flow area of blast pipe, causes the OBD (emission monitoring diagnostic system) of engine to alarm, very when serious Stop working to occurring engine because being vented not smooth.
To solve the problems, such as urea crystals, currently existing scheme is mainly the design of optimization urea nozzle, discharge duct design and urinated Plain blender design so that urea mixing is more uniform, avoids urea from being rebuffed as far as possible；Optimize urea injection calibration strategy, to the greatest extent Urea injection may be improved plays spray temperature, it is to avoid overspray.Nonetheless, urea crystals are still unlikely to prevent completely, In vehicle sections operating mode, urea still can be crystallized.
In the prior art, NO is reduced by SCR technologyxMain two kinds of the exhaust gas processing device of discharge, the first structure, such as Shown in Fig. 1 to Fig. 3, Fig. 1 is the first disclosed exhaust gas processing device structural representation in the prior art, and Fig. 2 is that mixing tube is total Into structural representation, Fig. 3 be blender structural representation, including the first connecting tube 1 ', urea nozzle 2 ', mixing pipe assembly 3 ', second connecting tube 4 ', SCR catalyst 5 ' and the 3rd connecting tube 6 ', the first connecting tube 1 ', mixing pipe assembly 3 ', the second connection Pipe 4 ', SCR catalyst 5 ' and the 3rd connecting tube 6 ' are sequentially communicated and junction is welding, the outlet of urea nozzle 2 ' and mixing tube Assembly 3 ' is connected；Mixing pipe assembly 3 ' includes mixing tube 301 ' and blender 302 ', and blender 302 ' is fixed on mixing tube 301 ' Side.Urea is sprayed into from urea nozzle 2 ', is sufficiently mixed, is urged evenly into SCR with exhaust at blender 32 Change device to be chemically reacted.Under indivedual operating modes, the region that urea can be between blender 302 ' and urea nozzle 2 ' is crystallized. Crystallization is once occur, and crystal can be accumulated rapidly, or even blocks the flow area of blast pipe.Due to the delivery temperature at crystal 350 DEG C are extremely difficult to, and to maintain longer time, it is impossible to crystal is decomposed using high temperature；2) due to mixing pipe assembly It is welding to be connected the 1 ', second connecting tube 4 ' before and after 3 ' with first, and the method that can not also use machinery to tap removes crystal.Condition And machinery percussion can damage blender 302 '.It will can only be changed from the first connection 1 ' to the second connecting tube 4 ' is overall, valency Lattice are expensive.
Second of structure of the prior art, as shown in figure 4, Fig. 4 is disclosed second of vent gas treatment in the prior art Apparatus structure schematic diagram, such a structure and the first structure are differed only between the second connecting tube 4 ' and SCR catalyst 5 ' Connection be flange connection.Advantage compared with the first structure is, when occurring urea crystals, can by from the second connecting tube 4 ' to Part between first connecting tube 1 ' is pulled down from car to be changed, without replacing SCR catalyst 5 ' and the 3rd connecting tube 6 ', but And certain replacement cost can be produced, or part will be removed and removed using method physically or chemically crystallization, operation is extremely Inconvenience.
How quickly and easily urea crystals thing to be cleared up, be one of this area major issue urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of exhaust gas processing device and blast pipe for being convenient to clean urea crystals thing, in mixing The two ends of pipe assembly form memory space, by injecting hot water into the memory space, reach and are convenient to clean urea crystals thing Purpose.
The present invention proposes a kind of exhaust gas processing device for being convenient to clean urea crystals thing, wherein, including mixing pipe assembly With two sealing pipe assemblies；
The two ends that pipe assembly is separately mounted to the mixing pipe assembly are sealed described in two；The mixing pipe assembly is provided with urine Plain nozzle mounting hole；
The sealing pipe assembly includes the first screw thread outer tube, screw thread inner tube and the second screw thread outer tube, the screw thread inner tube There is external thread structure, the first end of the screw thread inner tube has opening, the second end of the screw thread inner tube on the periphery at two ends Closing, the periphery at the second end of the screw thread inner tube is provided with multiple through holes；
The first end of the first screw thread outer tube is threadedly coupled with the first end of the screw thread inner tube, outside second screw thread The first end of pipe is threadedly coupled with the second end of the screw thread inner tube, and the internal diameter of the first end of the second screw thread outer tube is less than the The internal diameter at two ends, the second end of the second screw thread outer tube is provided with baffle ring；The end face at the second end of the screw thread inner tube can be supported Lean against on the baffle ring, and the hole on baffle ring is closed；
The bottom of the mixing pipe assembly, which is provided with dewatering outlet, the dewatering outlet, is detachably provided with drain plug.
The exhaust gas processing device as described above for being convenient to clean urea crystals thing, these, it is preferred to, the screw thread inner tube Periphery be provided with boss, and the boss be located at the screw thread inner tube middle part.
The exhaust gas processing device as described above for being convenient to clean urea crystals thing, these, it is preferred to, of the boss Number is 4, and is distributed uniformly and circumferentially.
The exhaust gas processing device as described above for being convenient to clean urea crystals thing, these, it is preferred to, also including sealing gasket Piece, the gasket seal is fixed on the second end of the screw thread inner tube, and has ripple struction on the gasket seal.
The exhaust gas processing device as described above for being convenient to clean urea crystals thing, these, it is preferred to, the mixing tube is total Into two ends connected respectively with the second ends of the second screw thread outer tube on two sealing pipe assemblies.
The exhaust gas processing device as described above for being convenient to clean urea crystals thing, these, it is preferred to, the screw thread inner tube The second end periphery on multiple through holes be uniformly distributed.
The exhaust gas processing device as described above for being convenient to clean urea crystals thing, these, it is preferred to, the mixing tube is total It is welding into the connected mode between two ends and sealing pipe assembly.
The invention allows for a kind of blast pipe, wherein, including the exhaust gas processing device described in any one as described above.
The invention provides a kind of exhaust gas processing device and blast pipe for being convenient to clean urea crystals thing, by mixing tube Sealing pipe assembly is installed at the two ends of assembly, passes through the screw thread inner tube on rotary seal pipe assembly so that sealing pipe assembly is first Switched under working condition and the second working condition, when two sealing pipe assemblies are under the first working condition, blast pipe is just Often work；When two sealing pipe assemblies are under the second working condition, it can be closed in the both sides of mixing pipe assembly so that mixed Close pipe assembly formation cavity.Thus, hot water is injected into the cavity by urea nozzle mounting hole, so as to quick cleaning urine Plain crystal.
Brief description of the drawings
Fig. 1 is the exhaust gas processing device structural representation of the first disclosed structure in the prior art；
Fig. 2 is the disclosed structural representation for mixing pipe assembly in the prior art；
Fig. 3 is the structural representation of disclosed blender in the prior art；
Fig. 4 is the exhaust gas processing device structural representation of disclosed second of structure in the prior art；
Fig. 5 is the mounting structure schematic diagram of mixing pipe assembly and sealing pipe assembly that the specific embodiment of the invention is proposed；
Fig. 6 is the structural representation for the mixing pipe assembly that the specific embodiment of the invention is proposed；
Fig. 7 is the sectional view for the mixing pipe assembly that the specific embodiment of the invention is proposed；
Fig. 8 is the structural representation under the sealing working condition of pipe assembly first that the specific embodiment of the invention is proposed；
Fig. 9 is A-A in Fig. 8 to sectional view；
Figure 10 is the structural representation under the sealing working condition of pipe assembly second that the specific embodiment of the invention is proposed；
Figure 11 is the B-B direction sectional view in Figure 10；
Figure 12 is the structural representation for the screw thread inner tube that the specific embodiment of the invention is proposed；
Figure 13 is C-C in Figure 12 to sectional view；
Figure 14 is the side view that the specific embodiment of the invention proposes sealing pipe assembly；
Figure 15 is the partial sectional view for the screw thread inner tube that the specific embodiment of the invention is proposed；
Figure 16 is the structural representation under the working condition of exhaust gas processing device first that the specific embodiment of the invention is proposed；
Figure 17 is the structural representation under the working condition of exhaust gas processing device second that the specific embodiment of the invention is proposed.
Description of reference numerals：
1 '-the first connecting tube, 2 '-urea nozzle, 3 '-mixing pipe assembly, 4 '-the second connecting tubes, 5 '-SCR catalyst, 6 '-the three connecting tubes；
301 '-mixing tube, 302 '-blender, 303 '-urea nozzle mounting hole；
1- seals pipe assembly, 2- gasket seals, 3- drain plugs；
101- the first screw thread outer tubes, 102- screw thread inner tubes, 103- the second screw thread outer tubes, 104- baffle rings, 105- boss, 106- Through hole.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Fig. 5 is the mounting structure schematic diagram of mixing pipe assembly and sealing pipe assembly that the specific embodiment of the invention is proposed； Fig. 6 is the structural representation for the mixing pipe assembly that the specific embodiment of the invention is proposed；Fig. 7 carries for the specific embodiment of the invention The sectional view of the mixing pipe assembly gone out；Under the working condition of sealing pipe assembly first that Fig. 8 proposes for the specific embodiment of the invention Structural representation；Fig. 9 is A-A in Fig. 8 to sectional view；Figure 10 is the sealing pipe assembly that the specific embodiment of the invention is proposed Structural representation under second working condition；Figure 11 is the B-B direction sectional view in Figure 10；Figure 12 is the specific embodiment of the invention The structural representation of the screw thread inner tube of proposition；Figure 13 is C-C in Figure 12 to sectional view；Figure 14 is the specific embodiment of the invention Propose the side view of sealing pipe assembly；Figure 15 is the partial sectional view for the screw thread inner tube that the specific embodiment of the invention is proposed；Figure 16 be the structural representation under the working condition of exhaust gas processing device first that the specific embodiment of the invention is proposed；Figure 17 is this hair Structural representation under the working condition of exhaust gas processing device second that bright embodiment is proposed.
Fig. 5 to Figure 17 is refer to, the specific embodiment of the invention proposes a kind of tail gas for being convenient to clean urea crystals thing Processing unit, wherein, including mixing pipe assembly 3 ', two sealing pipe assemblies 1 and gasket seal 2；
The two ends that pipe assembly 1 is separately mounted to the mixing pipe assembly 3 ' are sealed described in two；On the mixing pipe assembly 3 ' Provided with urea nozzle mounting hole 303 '；
The sealing pipe assembly 1 includes the first screw thread outer tube 101, the screw thread outer tube 103 of screw thread inner tube 102 and second, described External thread structure is equipped with the periphery at the two ends of screw thread inner tube 102, the first end of the screw thread inner tube 102 has opening, institute The second end seal for stating screw thread inner tube 102 is closed, and the periphery at the second end of the screw thread inner tube 102 is provided with multiple through holes 106；
The first end of the first screw thread outer tube 101 is threadedly coupled with the first end of the screw thread inner tube 102, and described second The first end of screw thread outer tube 103 is threadedly coupled with the second end of the screw thread inner tube 102, and the of the second screw thread outer tube 103 The internal diameter of one end is less than the internal diameter at the second end of the second screw thread outer tube 103；It so, it is possible to ensure outside second screw thread The periphery of the first end of pipe 103 and the screw thread inner tube 102 is tightly connected so that the second end of the second screw thread outer tube 103 Between the screw thread inner tube 102 have certain gap, it is ensured that the screw thread inner tube 102 can by through hole 106 with it is described Second screw thread outer tube 103 is connected；Second end of the second screw thread outer tube 103 is provided with baffle ring 104；The screw thread inner tube 102 The end face at the second end can be resisted against on the baffle ring 104, and the hole on baffle ring 104 is closed；Thus, when the screw thread inner tube When the end face at 102 the second end is not resisted against on the baffle ring 104, the screw thread inner tube 102 and the hole on the baffle ring 104 Connection.
The bottom of the mixing pipe assembly 3 ', which is provided with dewatering outlet, the dewatering outlet, is detachably provided with drain plug 3.
When specifically used, will mix two sealing pipe assemblies 1 at pipe assembly 3 ' two ends respectively with the first connecting tube 1 ', second Connecting tube 4 ' is connected；Second connecting tube 4 ', SCR catalyst 5 ' and the 3rd connecting tube 6 ' are sequentially connected with；Sealing pipe assembly 1 has two Under individual working condition, the first working condition, there is a certain distance, screw thread between baffle ring 104 and the second end of screw thread inner tube 102 Inner tube 102 is connected by through hole 106 with the hole on baffle ring 104；Under second working condition, the second end of screw thread inner tube 102 against On baffle ring 104, and the hole on baffle ring 104 is shut at the second end of screw thread inner tube 102, the hole on through hole 106 and baffle ring 104 without Method is connected.When two, which seal pipe assembly 1, is in the first working condition, the exhaust gas processing device is in the first working condition Under, tail gas can sequentially pass through the first connecting tube 1 ', sealing pipe assembly 1, mixing pipe assembly 3 ', sealing pipe assembly 1, second and connect Pipe 4 ', SCR catalyst 5 ' and the 3rd connecting tube 6 '；When two, which seal pipe assembly 1, is in the second working condition, the tail gas Processing unit is under the second working condition, the both sides for sealing pipe assembly 1 can be formed into sealing space.When needing to blender When crystal on 302 ' are handled, two screw thread inner tubes 102 are rotated, two sealing pipe assemblies 1 is in the second working condition, The urea nozzle 2 ' on urea nozzle mounting hole 303 ' is pulled down, and injects hot water or hot alcohol, due to crystal melamine Acid is soluble in the feature of hot water or hot alcohol, can be allowed to quick dissolving；Then drain plug 3 is opened, solution is flowed out by dewatering outlet. It so, it is possible to reach the purpose to the quick processing of crystal.
As a kind of preferred embodiment, the periphery of the screw thread inner tube 102 is provided with boss 105, and the boss 105 is located at The middle part of the screw thread inner tube 102.Further, the number of the boss 105 is 4, and is distributed uniformly and circumferentially.Such as This, by setting boss 105, can be easy to operate screw thread inner tube 102, be allowed in the first working condition and the second work Switch between state.
As a kind of preferred embodiment, the gasket seal 2 is fixed on the second end of the screw thread inner tube 102, and described There is ripple struction on gasket seal 2.It so, it is possible to ensure that in a second operative state, sealing pipe assembly 1 has well close Feng Xing.During specific implementation, the two ends of the mixing pipe assembly 3 ' respectively with outside the second screw threads on two sealing pipe assemblies 1 The second end connection of pipe 103.Thus, when two sealing pipe assemblies 1 are in the second working condition, the space formed is smaller, The cleaning for crystal can just be completed by adding a small amount of hot water.
As a kind of preferred embodiment, multiple through holes 106 on the periphery at the second end of the screw thread inner tube 102 uniformly divide Cloth.Thus, by setting multiple through holes 106, certain noise reduction can be played a part of, meanwhile, it is capable to make urea in tail gas Mixing it is more uniform.Connected mode between the mixing two ends of pipe assembly 3 ' and sealing pipe assembly 1 is welding.
The specific embodiment of the invention also proposed a kind of blast pipe, wherein, including the specific embodiment of the invention carried The exhaust gas processing device of confession.
Construction, feature and the action effect of the present invention is described in detail in the upper embodiment according to shown in schema, the above Only presently preferred embodiments of the present invention, but the present invention is not to limit practical range shown in drawing, it is every according to conception of the invention The change made, or the Equivalent embodiments of equivalent variations are revised as, still without departing from specification with illustrating during covered spirit, Should be within the scope of the present invention.

Claims (8)

1. a kind of exhaust gas processing device for being convenient to clean urea crystals thing, it is characterised in that close including mixing pipe assembly and two Tube sealing assembly；
The two ends that pipe assembly is separately mounted to the mixing pipe assembly are sealed described in two；The mixing pipe assembly sprays provided with urea Mouth mounting hole；
The sealing pipe assembly includes the first screw thread outer tube, screw thread inner tube and the second screw thread outer tube, the two ends of the screw thread inner tube Periphery on be equipped with external thread structure, the first end of the screw thread inner tube has opening, the second end seal of the screw thread inner tube Close, the periphery at the second end of the screw thread inner tube is provided with multiple through holes；
The first end of the first screw thread outer tube is threadedly coupled with the first end of the screw thread inner tube, the second screw thread outer tube First end is threadedly coupled with the second end of the screw thread inner tube, and the internal diameter of the first end of the second screw thread outer tube is less than the second end Internal diameter, the second end of the second screw thread outer tube is provided with baffle ring；The end face at the second end of the screw thread inner tube can be resisted against On the baffle ring, and the hole on baffle ring is closed；
The bottom of the mixing pipe assembly, which is provided with dewatering outlet, the dewatering outlet, is detachably provided with drain plug.
2. the exhaust gas processing device according to claim 1 for being convenient to clean urea crystals thing, it is characterised in that the screw thread The periphery of inner tube is provided with boss, and the boss is located at the middle part of the screw thread inner tube.
3. the exhaust gas processing device according to claim 2 for being convenient to clean urea crystals thing, it is characterised in that the boss Number be 4, and be distributed uniformly and circumferentially.
4. the exhaust gas processing device according to claim 1 for being convenient to clean urea crystals thing, it is characterised in that also including close Gasket, the gasket seal is fixed on the second end of the screw thread inner tube, and has ripple struction on the gasket seal.
5. the exhaust gas processing device according to claim 1 for being convenient to clean urea crystals thing, it is characterised in that the mixing Second end of the two ends of pipe assembly respectively with the second screw thread outer tube on two sealing pipe assemblies is connected.
6. the exhaust gas processing device according to claim 1 for being convenient to clean urea crystals thing, it is characterised in that the screw thread Multiple through holes on the periphery at the second end of inner tube are uniformly distributed.
7. the exhaust gas processing device for being convenient to clean urea crystals thing according to claim 1-6 any one, its feature exists In the connected mode between the mixing pipe assembly two ends and sealing pipe assembly is welding.
8. a kind of blast pipe, it is characterised in that including the exhaust gas processing device as described in claim any one of 1-7.
CN201710186827.XA 2017-03-27 2017-03-27 A kind of exhaust gas processing device and exhaust pipe being convenient to clean urea crystals object Active CN106948913B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110439656A (en) * 2019-08-20 2019-11-12 安徽江淮汽车集团股份有限公司 A kind of urea crystals object is molten to remove device
CN114060184A (en) * 2020-07-31 2022-02-18 比亚迪股份有限公司 Water-gas mixing device and engine

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CN202467994U (en) * 2012-02-08 2012-10-03 潍柴动力股份有限公司 Mixed section pipeline of SCR (Selective Catalytic Reduction) exhaust pipe
CN104121081A (en) * 2014-07-02 2014-10-29 潍柴动力股份有限公司 Air inlet pipe of SCR tail gas processing system and SCR tail gas processing system
CN105041433A (en) * 2015-09-01 2015-11-11 安徽江淮汽车股份有限公司 Automotive SCR system

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Publication number Priority date Publication date Assignee Title
WO2006108419A1 (en) * 2005-04-13 2006-10-19 Grundfos Nonox A/S A mixing device for mixing urea and air
CN202467994U (en) * 2012-02-08 2012-10-03 潍柴动力股份有限公司 Mixed section pipeline of SCR (Selective Catalytic Reduction) exhaust pipe
CN104121081A (en) * 2014-07-02 2014-10-29 潍柴动力股份有限公司 Air inlet pipe of SCR tail gas processing system and SCR tail gas processing system
CN105041433A (en) * 2015-09-01 2015-11-11 安徽江淮汽车股份有限公司 Automotive SCR system

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CN110439656A (en) * 2019-08-20 2019-11-12 安徽江淮汽车集团股份有限公司 A kind of urea crystals object is molten to remove device
CN114060184A (en) * 2020-07-31 2022-02-18 比亚迪股份有限公司 Water-gas mixing device and engine
CN114060184B (en) * 2020-07-31 2023-04-07 比亚迪股份有限公司 Water-gas mixing device and engine

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