CN108240253B - Urea nozzle - Google Patents
Urea nozzle Download PDFInfo
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- CN108240253B CN108240253B CN201711425989.0A CN201711425989A CN108240253B CN 108240253 B CN108240253 B CN 108240253B CN 201711425989 A CN201711425989 A CN 201711425989A CN 108240253 B CN108240253 B CN 108240253B
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- armature
- hole
- needle bar
- channel
- backflow
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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]
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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
- F01N3/24—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
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
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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
- 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
Abstract
The invention relates to a urea nozzle, which is characterized in that an upper channel, an armature inner channel, an elastic part blocking structure through hole, an elastic part, a needle rod traction part moving space, a needle rod traction part through hole, a gap formed between a needle rod and the side wall of a lower channel and a spray hole on a spray hole plate are arranged, the structures are communicated to form a complete channel of urea solution, the channel has a simple structure, the urea solution is easy to pass through, and different from the channel in the prior art, the urea solution enters a storage cavity through the circumferential arrangement of the spray holes on a valve core, so that the solution is not smooth in circulation.
Description
Technical Field
The invention relates to the technical field of engine tail gas aftertreatment, in particular to a urea nozzle.
Background
Selcetive Catalytic Reduction, SCR for short, refers to a Catalytic Reduction device installed in an exhaust system of a diesel vehicle to catalytically reduce nitrogen oxides in exhaust gas discharged from a diesel engine into nitrogen gas and water, and generally selects a urea aqueous solution as a reducing agent. The limit of the exhaust pollutants in the emission regulations of state iv and v is much lower than that of the emission regulations of state iii, and the limit of the exhaust pollutants (mainly particles and nitrogen oxides) of the diesel engine is much lower. It is difficult to reduce two kinds of exhaust pollutants simultaneously in the engine, so that the engine emission meets the requirements of national IV and V emission regulations, and therefore, the SCR system meets the national IV and V emission regulation requirements.
In the SCR system, urea aqueous solution is sprayed into an exhaust pipe through a urea nozzle and needs to be quantitatively sprayed according to the working condition of an engine, the requirement on atomization quality is high, the reaction area is large, the reaction is sufficient, and the reduction effect is good. The traditional urea nozzle is characterized in that urea aqueous solution mixed high-pressure air is discharged from a micropore and enters an exhaust pipe to chemically react with nitrogen oxide and other components in tail gas, and the problems of inaccurate injection amount, uneven injection and poor atomization effect exist.
In order to solve the above problem, chinese patent document CN2016209634863 discloses a nozzle, which comprises a shell, a valve body is arranged in the shell, a coil component is arranged between the valve body and the shell, an adjusting sleeve and a valve core are arranged in the valve body, the valve core can slide in the valve body, a spring fixing seat is arranged in the adjusting sleeve, an elastic element is arranged between the spring fixing seat and the valve core, a ball body is arranged at the front end of the valve core and penetrates between the partition plate and the nozzle, the valve core is circumferentially provided with a plurality of spray holes, a storage cavity is arranged among the valve core, the partition plate and the nozzle, the partition plate is provided with a communicating groove which enables the storage cavity to be communicated with the nozzle, the spring fixing seat is of a stepped structure, the diameter of the front end of the utility model is smaller than that of the rear end, the front end of the utility model is of a cylindrical structure, the rear end of the utility model is of an unclosed cylindrical structure, one end of the spring fixing seat is in contact with one end of the spring, and the other end of the spring is in contact with the valve core.
Although above-mentioned technique can improve atomization effect, the degree of improving is limited, and simultaneously, the nozzle structure in the above-mentioned technique, especially the structure that is equipped with the reservoir between the orifice structure of case and case, baffle and the nozzle is great in the preparation degree of difficulty, and the use is retained the night easily, finally influences the spraying effect.
Disclosure of Invention
To solve the above technical problem, the present invention provides a urea nozzle, including: the spraying device comprises a shell and a spraying hole plate matched with the shell; an upper channel and a lower channel are arranged in the shell, an armature accommodating space is arranged between the upper channel and the lower channel, an armature is arranged in the armature accommodating space, and the armature is fixed on the side wall of the armature accommodating space; a coil rack is arranged in the shell and around the armature, and a coil is arranged on the coil rack; the needle bar traction device comprises an armature, an armature inner channel, a needle bar traction part, an elastic part blocking structure and a needle bar fixing hole, wherein the armature is internally provided with an armature inner channel and a needle bar traction part moving space at the lower part of the armature inner channel; the needle bar is fixed on the needle bar fixing hole, and the steel ball is placed on the orifice plate; and a gap is formed between the needle rod and the side wall of the lower channel, and the needle rod penetrates through the lower channel to be matched with the steel ball and is combined with the spray holes on the spray hole plate to realize spraying.
Further, a vortex sheet accommodating space is formed between the lower end of the lower channel and the orifice plate, and vortex sheets are arranged in the vortex sheet accommodating space; the vortex sheet is provided with a needle bar hole, the upper end surface of the vortex sheet is a plane, the lower end surface of the vortex sheet is provided with an annular groove, a plurality of strip-shaped grooves with one narrow end and one wide end are formed by radiating from the circumferential direction of the needle bar hole to the annular groove, and a communication hole is formed from the upper end surface to the annular groove; and a connecting groove for connecting the communicating hole and the needle bar hole is arranged on the upper end surface.
Preferably, the strip-shaped groove is obliquely arranged.
Furthermore, the vortex sheet is also provided with a backflow hole, the backflow hole penetrates through the upper end face of the vortex sheet from the annular groove, meanwhile, the shell is provided with a backflow channel corresponding to the backflow hole, and the backflow channel is connected with the backflow unit through a backflow pipe.
Furthermore, an inverted conical surface structure matched with the steel ball is arranged on the orifice plate.
Furthermore, an inverted conical surface structure matched with the steel ball is arranged on the orifice plate.
Furthermore, one end of the elastic piece blocking structure is arranged in the armature inner channel and matched with the armature inner channel; and, the elastic piece blocking structure is provided with a through hole and a side slot on the side wall.
Further, the needle bar fixing hole is formed in the center of the needle bar traction piece, and meanwhile through holes are uniformly formed in the circumferential direction of the needle bar fixing hole.
Furthermore, the needle bar traction piece is provided with a mounting part at the bottom of the elastic piece fixing seat.
Further, the elastic member is a spring.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the urea nozzle is communicated to form a complete urea solution channel by the arrangement of the upper channel, the armature inner channel, the elastic part blocking structure through hole, the elastic part, the needle rod traction part moving space, the needle rod traction part through hole, a gap formed between the needle rod and the side wall of the lower channel and the spray hole on the spray hole plate.
(2) The urea nozzle is also provided with the vortex sheet, the needle rod penetrates through the vortex sheet through the needle rod hole, and meanwhile, the urea solution passes through the gap between the needle rod and the lower channel and then enters the spray hole through the connecting groove, the communicating hole and the strip-shaped groove to be sprayed out through the connecting groove, the communicating hole and the strip-shaped groove.
(3) According to the urea nozzle, the backflow hole is formed, so that residual urea solution in the nozzle is pumped out, and the influence of low-temperature crystallization of the solution on the use of the nozzle next time is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to derive other drawings without creative efforts.
FIG. 1 is a schematic diagram of a urea nozzle according to an embodiment of the present invention;
FIG. 2 is a front view of a vortex plate according to an embodiment of the present invention;
FIG. 3 is a view from A-A of FIG. 2;
FIG. 4 is a rear view of a vortex plate according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an armature according to an embodiment of the present invention;
fig. 6 is a perspective view of an armature according to an embodiment of the present invention;
FIG. 7 is a perspective view of a needle bar pulling member according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a fixing seat of an elastic member according to an embodiment of the present invention;
FIG. 9 is a perspective view of a spring retainer according to an embodiment of the present invention;
FIG. 10 is a front view of a blocking structure for the resilient member according to an embodiment of the present invention;
FIG. 11 is a view from the B-B direction of FIG. 10;
FIG. 12 is a top view of a spring blocking structure according to an embodiment of the present invention;
FIG. 13 is a front view of an orifice plate according to an embodiment of the present invention;
FIG. 14 is a view from the C-C of FIG. 13;
FIG. 15 is a rear view of an orifice plate according to an embodiment of the present invention;
the reference numbers in the figures denote: 1-a shell; 2-a spray orifice plate; 3-an armature; 4-needle bar traction element; 5-elastic piece fixing seat; 6-elastic member blocking structure; 7-vortex sheet; 9-steel ball; 10-a needle bar; 11-upper channel; 12-a lower channel; 13-inner coil form; 14-outer coil form; 17-a return channel; 18-a return pipe; 21-spraying holes; 22-inverted pyramidal face structure; 31-an armature inner channel; 32-needle bar traction element movement space; 33-an elastic member; 34-shaped ring fixing grooves; 35-shaped ring; 41-needle bar fixing hole; 42-a mounting portion; 51-a clamping groove; 52-a clamping part; 53-arc shaped portion; 61-side grooving; 71-needle bar hole; 72-an annular groove; 73-a strip-shaped groove; 74-communication hole; 75-a connecting trough; 76-Return orifice.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The embodiments in the present invention, other embodiments obtained by persons skilled in the art without any inventive work, belong to the protection scope of the present invention.
Example 1
The present embodiment provides a urea nozzle, including: the device comprises a shell 1 and a spray orifice plate 2 matched with the shell 1; an upper channel 11 and a lower channel 12 are arranged in the shell 1, an armature accommodating space is arranged between the upper channel 11 and the lower channel 12, an armature 3 is arranged in the armature accommodating space, and the armature 3 is fixed on the side wall of the armature accommodating space; a coil rack is arranged in the shell 1 and around the armature 3, and a coil is arranged on the coil rack; an armature inner channel 31 and a needle bar traction part moving space 32 at the lower part of the armature inner channel 31 are arranged in the armature 3, an elastic part 33 is arranged in the armature inner channel 31, the lower end of the elastic part 33 is connected with an elastic part fixing seat 5 arranged on a needle bar traction part 4, a through hole and a needle bar fixing hole 41 are arranged on the needle bar traction part 4, an elastic part blocking structure 6 is arranged at the upper end of the armature inner channel 31, and a through hole is arranged in the elastic part blocking structure 6; the needle bar is fixed on the needle bar fixing hole 41, and a steel ball is placed on the orifice plate 2; a gap is formed between the needle rod 10 and the side wall of the lower channel 12, and the needle rod 10 penetrates through the lower channel to be matched with the steel ball 9 12 and is combined with the spray hole 21 on the spray hole plate 2 to realize spraying.
The technical scheme is the core technical scheme of the invention, the structure is communicated to form a complete channel of the urea solution by arranging the upper channel 11, the armature inner channel 31, the elastic part blocking structure 6 through hole, the elastic part 33, the needle rod traction part moving space 32, the needle rod traction part 4 through hole, a gap formed between the needle rod 10 and the side wall of the lower channel 12 and the spray hole 21 on the spray hole plate 2, the channel has a simple structure, the urea solution passes through the channel simply, and different from the channel in the prior art, the spray holes are required to be arranged in the circumferential direction of the valve core to enter the storage cavity, so that the solution is not smoothly circulated.
Specifically, as shown in fig. 1, a urea nozzle includes a housing 1, the shape of the housing 1 is not particularly limited, the whole housing may be designed in a sectional manner, and the whole housing 1 is formed by a mechanical method after each component is assembled, such as welding; an upper channel 11 and a lower channel 12 are arranged in the shell 1, an armature accommodating space is arranged between the upper channel 11 and the lower channel 12, an armature 3 is arranged in the armature accommodating space, the armature 3 is fixed on the side wall of the armature accommodating space, the shape of the armature 3 is basically consistent with that of the armature accommodating space, so that the armature accommodating space just accommodates the lower armature 3, as shown in fig. 5 and 6, the armature 3 is of a bottle shape, the arrangement form of the armature accommodating space is provided with a plurality of fixing grooves 34, such as the upper end of the armature, and the upper end of the armature is provided with a ring 35 for fixing the armature 3, wherein the ring 35 can be round, square or round, and the ring 35 can be fixed on the upper end of the armature
Form, in a wordIn order to fix the armature 3, in order to achieve the best effect, the upper end and the lower end of the armature 3 can be fixed in a welding mode, or the two modes are adopted; a coil rack is arranged in the shell 1 and around the armature 3, and a coil is arranged on the coil rack, in the embodiment, the coil rack comprises an inner coil rack 13 and an outer coil rack 14, and a coil is arranged between the inner coil rack and the outer coil rack and is connected with a control unit; an armature inner channel 31 and a needle bar traction part moving space 32 at the lower part of the armature inner channel 31 are arranged in the armature 3, and the needle bar traction part moving space 32 is used for the up-and-down movement of the needle bar traction part 4; an elastic element 33 is arranged in the armature inner channel 31, the lower end of the elastic element 33 is connected with an elastic element fixing seat 5 arranged on the needle rod traction element 4, the elastic element 33 drives the needle rod traction element 4 to move up and down through compression and expansion, and solution can reach the needle rod traction element 4 through the elastic element 33 and the elastic element fixing seat 5, the elastic element 33 is preferably a spring, and more preferably a return spring; elastic component fixing base 5 sets up the needle bar pulls the mode of piece 4 to have a lot, as shown in fig. 7-9, elastic component fixing base 5 includes joint groove 51, joint portion 52 and base, elastic component 33 is through connecing groove 51 joint on joint portion 52, the needle bar pulls 4 whole for the cylinder, is provided with needle bar fixed orifices 41 in central point, and is provided with the installation department 42 of indent in one end for the installation the bottom of elastic component fixing base 5, the shape of installation department 42 is not restricted, and is preferred cylindrical, the bottom of elastic component fixing base 5 inlays in the installation department 42, for with installation department 42 phase-match is formed with curved arc portion 53, and the two is in the same place through welding assembly, simultaneously, needle bar pulls 4 and is provided with the through-hole to be convenient for the passing through of solution, preferably in installation department 42, Through holes are uniformly formed in the periphery of the needle bar fixing hole 41 in the circumferential direction, and when the bottom of the elastic element fixing seat 5 is embedded into the mounting part 42, the through holes are leaked, so that the through holes are not completely covered; the elastic element fixing seat 5 may also be provided with a through hole for fixing the end of the needle bar 10 so that the needle bar 10 moves along a first trackTherefore, the skew phenomenon is reduced; an elastic member blocking structure 6 is arranged at the upper end of the armature inner channel 31, a through hole is arranged in the elastic member blocking structure 6, the elastic member blocking structure 6 is used for fixing or fixing the stroke of the upper end of the elastic member 33, in order to enable the solution to smoothly pass through, fix and install, besides the through hole, a side open groove 61 is also arranged, and the structure of the elastic member blocking structure 6 is not limited, in the embodiment, as shown in fig. 10-12, the elastic member blocking structure 6 is a cylinder with two sections of thin and thick middle parts, and simultaneously, arc surface designs are formed on the side walls at the two ends of the side open groove 61; the needle bar 10 is fixed on the needle bar fixing hole 41, the needle bar 10 is solid, and the steel ball 8 is placed on the spray hole plate 2; a gap is formed between the needle rod 10 and the side wall of the lower channel 12, the needle rod 10 penetrates through the lower channel 12 to be matched with the steel ball 8 and is combined with a spray hole 21 on the spray hole plate 2 to realize spraying, in the embodiment, as shown in fig. 13-15, the spray hole plate 2 is provided with an inverted conical surface structure 22 matched with the steel ball 8, and the spray hole 21 is arranged at the central bottom end of the inverted conical surface structure 22.
As a modified embodiment, a vortex sheet accommodating space is arranged between the lower end of the lower channel 12 and the orifice plate 2, and a vortex sheet 7 is arranged in the vortex sheet accommodating space; the vortex sheet 7 has an outer shape fitting the vortex sheet accommodating space, as shown in fig. 2-4, the vortex sheet 7 is provided with the needle bar hole 71 for the needle bar 10 to pass through, the upper end surface of the vortex sheet 7 is a plane, the lower end surface of the vortex sheet is formed with an annular groove 72, a plurality of strip-shaped grooves 73 with one narrow end and one wide end are formed from the needle bar hole 71 to the annular groove 72 by radiating circumferentially, in this embodiment, the strip-shaped grooves 73 are 5 and are arranged obliquely; a communication hole 74 is provided from the upper end face to the annular groove 72; a connecting groove 75 for connecting the communicating hole 74 and the needle bar hole 10 is provided on the upper end surface.
As a modified embodiment, the vortex sheet 7 is further provided with a return hole 76, the return hole 76 penetrates from the annular groove 72 to the upper end surface of the vortex sheet 7, the housing 1 is provided with a return channel 17 corresponding to the return hole 76, the return channel 17 is connected to a return unit through a return pipe 18, the return unit is arranged outside, and may be a vacuum pump or the like, which is not described herein.
When in use, the solution passes through the upper channel 11, the through hole of the elastic element blocking structure 6, the elastic element 33, the periphery of the elastic element fixing seat 5, the through hole of the needle rod traction element 4, the lower part of the moving space of the needle rod traction element, the gap between the needle rod 10 and the lower channel 12, the connecting groove 75, the communicating hole 74, the annular groove 72, the strip-shaped groove 73 and the inverted conical surface structure 22, and then is sprayed out through the spraying hole 21; in the moving process of the needle rod 10, the coil is electrified to enable the armature 3 to generate magnetism, the elastic part 33 is driven to compress, the elastic part fixing seat 5, the needle rod traction part 4 and the needle rod are driven to move upwards, then the solution is sprayed out, after the power is off, the magnetism of the armature 3 disappears, the compressed elastic part 33 stretches out, the elastic part fixing seat 5, the needle rod traction part 4 and the needle rod are driven to move downwards, the steel ball 8 is pressed, and the spray hole 21 is blocked; after use, the remaining solution is pumped out by negative pressure through the reflux unit, the reflux tube 18, the reflux channel 17 and the reflux hole 76 in order to crystallize the remaining solution in the nozzle.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (7)
1. A urea nozzle, comprising:
the spraying device comprises a shell and a spraying hole plate matched with the shell;
an upper channel and a lower channel are arranged in the shell, an armature accommodating space is arranged between the upper channel and the lower channel, an armature is arranged in the armature accommodating space, and the armature is fixed on the side wall of the armature accommodating space; a coil rack is arranged in the shell and around the armature, and a coil is arranged on the coil rack; the needle bar traction device comprises an armature, an armature inner channel, a needle bar traction part, an elastic part blocking structure and a needle bar fixing hole, wherein the armature is internally provided with an armature inner channel and a needle bar traction part moving space at the lower part of the armature inner channel;
the needle bar is fixed on the needle bar fixing hole, and the steel ball is placed on the orifice plate; a gap is formed between the needle rod and the side wall of the lower channel, and the needle rod penetrates through the lower channel to be matched with the steel ball and is combined with the spray holes on the spray hole plate to realize spraying;
a vortex sheet accommodating space is formed between the lower end of the lower channel and the orifice plate, and vortex sheets are arranged in the vortex sheet accommodating space; the vortex sheet is provided with a needle bar hole, the upper end surface of the vortex sheet is a plane, the lower end surface of the vortex sheet is provided with an annular groove, a plurality of strip-shaped grooves with one narrow end and one wide end are formed by radiating from the circumferential direction of the needle bar hole to the annular groove, and a communication hole is formed from the upper end surface to the annular groove; a connecting groove for connecting the communicating hole and the needle bar hole is arranged on the upper end surface;
the vortex sheet is also provided with a backflow hole, the backflow hole penetrates through the upper end face of the vortex sheet from the annular groove, meanwhile, the shell is provided with a backflow channel corresponding to the backflow hole, and the backflow channel is connected with the backflow unit through a backflow pipe.
2. The urea nozzle of claim 1, wherein the strip-shaped groove is disposed diagonally.
3. The urea nozzle according to claim 1, wherein the orifice plate is provided with an inverted conical surface structure adapted to the steel ball.
4. The urea nozzle of claim 1, wherein the resilient member blocking structure is disposed at one end within the armature internal passage that mates with the armature internal passage; and, the elastic piece blocking structure is provided with a through hole and a side slot on the side wall.
5. The urea nozzle according to claim 1, wherein the needle bar fixing hole is provided at a central position of the needle bar drawing member, and through holes are uniformly provided in a circumferential direction of the needle bar fixing hole.
6. Urea nozzle according to claim 5, characterized in that a mounting part of the spring element holder bottom is provided on the needle bar traction element.
7. The urea nozzle of claim 1, wherein the resilient member is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711425989.0A CN108240253B (en) | 2017-12-21 | 2017-12-21 | Urea nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711425989.0A CN108240253B (en) | 2017-12-21 | 2017-12-21 | Urea nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108240253A CN108240253A (en) | 2018-07-03 |
| CN108240253B true CN108240253B (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711425989.0A Active CN108240253B (en) | 2017-12-21 | 2017-12-21 | Urea nozzle |
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| CN (1) | CN108240253B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723524B (en) * | 2018-12-27 | 2020-11-10 | 宁波安创电子科技有限公司 | Vortex type urea nozzle |
| CN110005831A (en) * | 2019-04-26 | 2019-07-12 | 江苏巴腾科技有限公司 | A kind of valve seat and horizontal pitching in nozzle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19835340A1 (en) * | 1997-11-03 | 2000-02-10 | Guenter Slowik | Method and injection nozzle for injecting fuel into the combustion chamber of an internal combustion engine |
| US7467749B2 (en) * | 2004-04-26 | 2008-12-23 | Tenneco Automotive Operating Company Inc. | Methods and apparatus for injecting atomized reagent |
| CN101497064A (en) * | 2008-01-30 | 2009-08-05 | 臧汝诚 | Atomizing nozzle |
| CN105065095A (en) * | 2015-08-21 | 2015-11-18 | 南岳电控(衡阳)工业技术有限公司 | Urea direct injection nozzle |
| CN206027977U (en) * | 2016-08-29 | 2017-03-22 | 浙江巴腾动力系统有限公司 | Urea nozzle |
| CN206290310U (en) * | 2016-09-14 | 2017-06-30 | 无锡威孚高科技集团股份有限公司 | Split type urea measuring jet structure |
-
2017
- 2017-12-21 CN CN201711425989.0A patent/CN108240253B/en active Active
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| Publication number | Publication date |
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| CN108240253A (en) | 2018-07-03 |
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