CN105604654B - A kind of urea nozzle seat and spray nozzle device - Google Patents
A kind of urea nozzle seat and spray nozzle device Download PDFInfo
- Publication number
- CN105604654B CN105604654B CN201510989324.7A CN201510989324A CN105604654B CN 105604654 B CN105604654 B CN 105604654B CN 201510989324 A CN201510989324 A CN 201510989324A CN 105604654 B CN105604654 B CN 105604654B
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- Prior art keywords
- urea
- pedestal
- urea nozzle
- nozzle
- nozzle seat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to technical field of engines, disclose a kind of urea nozzle seat and spray nozzle device, the urea nozzle seat includes the pedestal that bottom is equipped with spray orifice, the side wall of the pedestal surrounds round cavity, matched filling member is equipped in the inner cavity, the filling member is equipped with sleeve configuration through-hole, and the sleeve configuration through-hole is connected to the spray orifice, and its width is less than the diameter of the spray orifice.The spray nozzle device includes nozzle and urea nozzle seat above-mentioned, and the urea nozzle seat is fixed on for being positioned to the nozzle on SCR babinets.A kind of urea nozzle seat and spray nozzle device provided by the invention solve the spray nozzle device of the SCR system of the prior art when spraying urea, urea forms the problem of crystallizing easily in the cavity of urea nozzle seat due to being equipped with a long narrow lumens in urea nozzle seat.
Description
Technical field
The present invention relates to technical field of engines more particularly to a kind of exhaust gas post-treatment devices of engine, more specifically
It is related to a kind of urea nozzle seat equipped with long narrow lumens and the spray nozzle device with the urea nozzle seat.
Background technology
SCR technology (English name：Selective Catalytic Reduction, english abbreviation：
SCR concrete principle) is：Using ammonia, ammonium hydroxide, urea or hydro carbons as reducing agent, two quantity of NOx concentration are higher by oxygen concentration
Grade or more under conditions of, NOx is preferentially reduced to N with high selectivity2.Wherein, the effect of catalysis is to reduce the work of decomposition reaction
Change energy, its reaction temperature is made to be reduced to suitable temperature range.
Since the product of SCR technology is NO2And H2O, all products are environmentally safe, therefore,
Selective catalytic reduction device is widely used on diesel engine for automobile.Most common catalyst and reducing agent on diesel engine for automobile
It is V respectively2O5/TiO2Metal oxides type catalyst and aqueous solution of urea.NOx is restored using urea as reducing agent, urea is not
Reduction reaction is participated in only in the form of ammonia, and the by-product isocyanic acid (HNCO) that it is decomposed can also restore NOx, while urea
The vapor generated in decomposable process helps to inhibit NH under high temperature3By the probability that direct oxidation is NOx.So being with urea
The SCR system of reducing agent becomes the first choice of selective catalytic reduction device.
Urea nozzle seat is an important feature for installing urea nozzle, is that urea nozzle is mounted in after-treatment system
Fixed structure, the inner hollow of urea nozzle seat, and form cavity ensures that urea is sprayed to be connected to main blending space
Become owner of blending space.But urea from nozzle ejection after, first by the cavity in urea nozzle seat, due to circular sky
Chamber is connected to main blending space, is easy to form swirling eddy in cavity, and the smaller particle in urea spray is easy to be blown by air-flow
It rises and is gradually gathered in the cavity of urea nozzle seat, form crystallization.
Invention content
(1) technical problems to be solved
The technical problem to be solved in the present invention is to provide a kind of urea nozzle seat and spray nozzle devices, due in urea nozzle
Seat is equipped with a long narrow lumens, solves the spray nozzle device of the SCR system of the prior art when spraying urea, and urea is easily sprayed in urea
The problem of crystallization is formed in the cavity of mouth seat.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of urea nozzle seat and spray nozzle devices.
A kind of urea nozzle seat, including bottom are equipped with the pedestal of spray orifice, and the side wall of the pedestal surrounds round cavity, described
Matched filling member is equipped in inner cavity, the filling member is equipped with sleeve configuration through-hole, and the sleeve configuration through-hole is connected to institute
Spray orifice is stated, and its width is less than the diameter of the spray orifice.
Further, the section of aforementioned sleeve configuration through-hole is class trapezium structure, and the both ends of the class trapezium structure are by two
The bevel edge that the symmetrical camber line of item is constituted.
Further, aforementioned spray orifice is offset to the bottom of the pedestal, and two bottom edges of the class trapezium structure are described in
The distance in the spray orifice center of circle is identical.
Further, aforementioned pedestal is structure as a whole with the filling member.
Further, the one end of aforementioned pedestal far from the spray orifice is equipped with the fixed mechanism for being connect with SCR babinets.
Further, one end of aforementioned filling member protrudes from the pedestal, and the filling member protrudes from the portion of the pedestal
Divide and constitutes the fixed mechanism.
Further, the outer wall of aforementioned pedestal is equipped with the detent mechanism for positioning nozzle.
Further, aforementioned detent mechanism is several protrusions with location hole, circumferential direction of the protrusion along the pedestal
It is uniformly distributed.
A kind of spray nozzle device, including nozzle and urea nozzle seat above-mentioned, the urea nozzle seat are used for the nozzle
It is positioned, and is fixed on SCR babinets.
Further, aforementioned urea nozzle carrier by the location hole and with the matched bayonet fittings of the location hole to institute
It states nozzle to be positioned, the urea nozzle seat is connect by fixed mechanism with the SCR welding box bodies.
(3) advantageous effect
The above-mentioned technical proposal of the present invention has the advantages that：
A kind of urea nozzle seat provided by the invention, including bottom are equipped with the pedestal of spray orifice, and the side wall of pedestal surrounds circle
Inner cavity is equipped with matched filling member in inner cavity, and filling member is equipped with sleeve configuration through-hole, and sleeve configuration through-hole is connected to spray orifice,
And its width is less than the diameter of spray orifice.Relative to the inner-cavity structure of regular circle shapes, the irregular structure of sleeve configuration through-hole is unfavorable for
The formation of swirling eddy is more conducive to the injection path line that urea spray keeps rule at injection initial stage, completes from nozzle carrier
To the smooth transition of main mixed zone, it is possible to prevente effectively from the formation of vortex, reduces small particles in the accumulation crystallization of nozzle carrier inner cavity
Risk.
A kind of spray nozzle device provided by the invention, including nozzle and urea nozzle seat above-mentioned, urea nozzle seat for pair
Nozzle is positioned, and is fixed on SCR babinets, and the steady mistake from nozzle carrier to main mixed zone is completed in exhaust gas post-treatment device
When crossing, it is possible to prevente effectively from the formation of vortex, reduces the risk that small particles are crystallized in the accumulation of nozzle carrier inner cavity.
Description of the drawings
Fig. 1 is the concrete structure schematic diagram of urea nozzle seat of the present invention；
Fig. 2 is the vertical view of urea nozzle seat of the present invention.
Wherein, 1：Pedestal；2：Spray orifice；3：Filling member；4：Sleeve configuration through-hole；5：Fixed mechanism；6：Protrusion；7：Location hole.
Specific implementation mode
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment is used for
Illustrate the present invention, but cannot be used for limiting the scope of the invention.
In the description of the present invention, it should be noted that unless otherwise indicated, " several " be meant that one or one with
On；The orientation or positional relationship of the instructions such as term "inner", "outside", " bottom " is to be based on the orientation or positional relationship shown in the drawings,
Be merely for convenience of description of the present invention and simplification of the description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, can also be electrical connection；It can be directly connected, it can also be indirectly connected through an intermediary.It is right
For those skilled in the art, visual concrete condition understands the concrete meaning of above-mentioned term in the present invention.
As shown in Figure 1, 2, an embodiment of the present invention provides a kind of urea nozzle seats, including bottom to be equipped with the pedestal of spray orifice 2
1, the side wall of pedestal 1 surrounds round cavity, matched filling member 3 is equipped in inner cavity, filling member 3 is logical equipped with sleeve configuration
Hole 4, sleeve configuration through-hole 4 is connected to spray orifice 2, and its width is less than the diameter of spray orifice 2.In practical application, one end of sleeve configuration through-hole 4
It is connected to the outlet of nozzle, the other end is connected to by spray orifice 2 with main mixed zone, completes urea from nozzle to the transition of main mixed zone.
Relative to the inner-cavity structure of regular circle shapes, the irregular structure of sleeve configuration through-hole 4 is unfavorable for the formation of swirling eddy, advantageously
The injection path line for keeping rule at injection initial stage in urea spray is completed from nozzle carrier to the smooth transition of main mixed zone, can
Effectively to avoid the formation of vortex, reduce the risk that small particles are crystallized in the accumulation of nozzle carrier inner cavity.
In the present embodiment, the section of sleeve configuration through-hole 4 is class trapezium structure, and the both ends of class trapezium structure are symmetrical by two
The bevel edge that constitutes of camber line, and the longer bottom edge of the class trapezium structure in the present embodiment is overlapped with the diameter of pedestal 1, and the bottom edge
For the diameter of the camber line of composition bevel edge.Spray orifice 2 is offset to the bottom of pedestal 1, two bottom edges to 2 center of circle of spray orifice of class trapezium structure
Distance it is identical.In addition, the cross sectional shape of sleeve configuration through-hole 4 is in addition to the class trapezium structure in the present embodiment, sleeve configuration through-hole 4
Cross sectional shape can also be irregular polygon, ellipse or oblong, as long as can guarantee that its width is less than spray orifice 2
Diameter.
Pedestal 1 is structure as a whole with filling member 3, ensures to be fitted without gap between pedestal 1 and filling member 3, avoids stitching
Crystal is coalesced in gap.
The one end of pedestal 1 far from spray orifice 2 is equipped with the fixed mechanism 5 for being connect with SCR babinets.In the present embodiment, filling
One end of part 3 protrudes from pedestal 1, and the part that filling member protrudes from pedestal 1 constitutes fixed mechanism 5, for ensure urea nozzle seat with
SCR babinets closely reliably connect, and fixed mechanism 5 is connect with SCR welding box bodies.
The outer wall of pedestal 1 is equipped with the detent mechanism for positioning nozzle.In the present embodiment, detent mechanism is several carries
The protrusion 6 of location hole 7, it is preferred that the quantity of protrusion 6 is 3, and 3 protrusions 6 are uniformly distributed along the circumferential direction of pedestal 1, is ensured
Urea nozzle seat reliably positions nozzle.
Another kind embodiment of the invention provides a kind of spray nozzle device, including nozzle and urea nozzle seat, urea nozzle seat
For being positioned to nozzle, and it is fixed on SCR babinets.
Urea nozzle seat positions nozzle by location hole 7 and with 7 matched bayonet fittings of location hole, urea nozzle
Seat is connect by fixed mechanism 5 with SCR welding box bodies.
Urea nozzle seat and nozzle are attached and are positioned with the cooperation of location hole 7 in use, first passing through pin, then will even
The connecting hole that the fixed mechanism 5 of the urea nozzle seat connected is inserted into SCR babinets is positioned, and with by SCR babinets and fixation
Mechanism 5 is welded to connect.
The embodiment of the present invention provides for the sake of example and description, and is not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
It is and to make those skilled in the art to more preferably illustrate the principle of the present invention and practical application to select and describe embodiment
It will be appreciated that various embodiments with various modifications of the present invention to design suitable for special-purpose.
Claims (10)
1. a kind of urea nozzle seat, including bottom are equipped with the pedestal of spray orifice, the side wall of the pedestal surrounds round cavity, feature
It is, matched filling member is equipped in the inner cavity, and the filling member is equipped with sleeve configuration through-hole, and the sleeve configuration is logical
Hole is connected to the spray orifice, and its width is less than the diameter of the spray orifice.
2. urea nozzle seat according to claim 1, which is characterized in that the section of the sleeve configuration through-hole is the trapezoidal knot of class
The both ends of structure, the class trapezium structure are the bevel edge being made of two symmetrical camber lines.
3. urea nozzle seat according to claim 2, which is characterized in that the spray orifice is offset to the bottom of the pedestal,
The distance in two bottom edges to the spray orifice center of circle of the class trapezium structure is identical.
4. according to claim 1-3 any one of them urea nozzle seats, which is characterized in that the pedestal is with the filling member
Integral structure.
5. urea nozzle seat according to claim 4, which is characterized in that the one end of the pedestal far from the spray orifice is equipped with
Fixed mechanism for being connect with SCR babinets.
6. urea nozzle seat according to claim 5, which is characterized in that one end of the filling member protrudes from the seat
Body, the part that the filling member protrudes from the pedestal constitute the fixed mechanism.
7. urea nozzle seat according to claim 5, which is characterized in that the outer wall of the pedestal is equipped with for positioning spray
The detent mechanism of mouth.
8. urea nozzle seat according to claim 7, which is characterized in that the detent mechanism is several with location hole
Protrusion, the protrusion are uniformly distributed along the circumferential direction of the pedestal.
9. a kind of spray nozzle device, which is characterized in that the urea nozzle including nozzle and as described in any one of claim 1-8
Seat, the urea nozzle seat are fixed on for being positioned to the nozzle on SCR babinets.
10. spray nozzle device according to claim 9, which is characterized in that the urea nozzle seat by the location hole and
The nozzle is positioned with the location hole matched bayonet fittings, the urea nozzle seat by fixed mechanism with it is described
SCR welding box bodies connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989324.7A CN105604654B (en) | 2015-12-25 | 2015-12-25 | A kind of urea nozzle seat and spray nozzle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989324.7A CN105604654B (en) | 2015-12-25 | 2015-12-25 | A kind of urea nozzle seat and spray nozzle device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105604654A CN105604654A (en) | 2016-05-25 |
| CN105604654B true CN105604654B (en) | 2018-08-07 |
Family
ID=55984931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510989324.7A Active CN105604654B (en) | 2015-12-25 | 2015-12-25 | A kind of urea nozzle seat and spray nozzle device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105604654B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2143902A1 (en) * | 2008-07-10 | 2010-01-13 | Ibiden Co., Ltd. | Holding sealing material, exhaust gas purifying apparatus and method for manufacturing exhaust gas purifying apparatus |
| KR100949382B1 (en) * | 2009-09-18 | 2010-03-25 | 광성(주) | Scr system |
| JP2011032970A (en) * | 2009-08-04 | 2011-02-17 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device of engine |
| CN202500641U (en) * | 2012-02-08 | 2012-10-24 | 潍柴动力股份有限公司 | Fixing device for SCR system urea nozzle |
| CN202645690U (en) * | 2012-07-03 | 2013-01-02 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure thereof |
| CN103422952A (en) * | 2012-05-25 | 2013-12-04 | 天纳克（中国）有限公司 | Integrated semiconductor control rectifier (SCR) system for automobile |
| CN203347897U (en) * | 2013-06-18 | 2013-12-18 | 潍柴动力股份有限公司 | SCR urea nozzle |
| CN203742796U (en) * | 2014-02-19 | 2014-07-30 | 潍柴动力股份有限公司 | Diesel engine |
| CN204627712U (en) * | 2015-04-27 | 2015-09-09 | 十堰市倍力汽车管业有限公司 | A kind of novel heat-insulation urea nozzle device |
-
2015
- 2015-12-25 CN CN201510989324.7A patent/CN105604654B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2143902A1 (en) * | 2008-07-10 | 2010-01-13 | Ibiden Co., Ltd. | Holding sealing material, exhaust gas purifying apparatus and method for manufacturing exhaust gas purifying apparatus |
| JP2011032970A (en) * | 2009-08-04 | 2011-02-17 | Mitsubishi Fuso Truck & Bus Corp | Exhaust emission control device of engine |
| KR100949382B1 (en) * | 2009-09-18 | 2010-03-25 | 광성(주) | Scr system |
| CN202500641U (en) * | 2012-02-08 | 2012-10-24 | 潍柴动力股份有限公司 | Fixing device for SCR system urea nozzle |
| CN103422952A (en) * | 2012-05-25 | 2013-12-04 | 天纳克（中国）有限公司 | Integrated semiconductor control rectifier (SCR) system for automobile |
| CN202645690U (en) * | 2012-07-03 | 2013-01-02 | 安徽艾可蓝节能环保科技有限公司 | Urea nozzle of SCR (Selective Catalytic Reduction) system and mounting structure thereof |
| CN203347897U (en) * | 2013-06-18 | 2013-12-18 | 潍柴动力股份有限公司 | SCR urea nozzle |
| CN203742796U (en) * | 2014-02-19 | 2014-07-30 | 潍柴动力股份有限公司 | Diesel engine |
| CN204627712U (en) * | 2015-04-27 | 2015-09-09 | 十堰市倍力汽车管业有限公司 | A kind of novel heat-insulation urea nozzle device |
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| Publication number | Publication date |
|---|---|
| CN105604654A (en) | 2016-05-25 |
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