CN202789031U - Selective catalytic reduction (SCR) atomization spray-head for gas auxiliary internal-combustion engine - Google Patents
Selective catalytic reduction (SCR) atomization spray-head for gas auxiliary internal-combustion engine Download PDFInfo
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- CN202789031U CN202789031U CN 201220332385 CN201220332385U CN202789031U CN 202789031 U CN202789031 U CN 202789031U CN 201220332385 CN201220332385 CN 201220332385 CN 201220332385 U CN201220332385 U CN 201220332385U CN 202789031 U CN202789031 U CN 202789031U
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Abstract
The utility model discloses a selective catalytic reduction (SCR) atomization spray-head for a gas auxiliary internal-combustion engine. The SCR atomization spray-head comprises a nozzle, a pipeline and a pipeline port which are sequentially connected, wherein a fixing nut is sleeved on the pipeline, a fixing gasket is arranged between the fixing nut and the pipeline, a fan-shaped nozzle core is inlaid in the nozzle and composed of two intersected petals, each petal is provided with a guide structure provided with a rectangular notch, the nozzle is provided with a plurality of ejecting holes, and the axial direction of the ejecting holes is the same as the direction of exhaust flow of an engine. The unique design of the fan-shaped nozzle core plays a function of dispersing and guiding of urea water solution and compressed air mixing fluid, and enables atomization of the urea water solution to be more even, thin and condensed. According to the SCR atomization spray-head for the gas auxiliary internal-combustion engine, combination of simple mechanical structures is utilized to obtain a better atomization state of the urea water solution and improve converting efficiency of nitrogen oxide.
Description
Technical field
The utility model relates to a kind of exhaust gas aftertreatment system used unit, relates in particular to the exhaust aftertreatment urea atomization spray cap that a kind of internal combustion engine of motor vehicle is used.
Background technique
Energy-conserving and environment-protective are hot subjects of our times science and technology economic development, and the discharging of control and restricting vehicle exhaust pollutant is the important constituent element of energy-conserving and environment-protective work.At present, the post-processing technology for diesel engine vent gas is that selective catalytic reduction technology (SCR) is widely used.The SCR know-why refers to that under the effect of catalyzer, reducing agent generates the nitrogen G﹠W with nitrous oxides selectivity reduction.In automotive engineering, the SCR method just more and more is used to carry on the Motor Vehicle of diesel engine, thereby has reduced the emission level of pollutant, makes it meet the requirement of state's IV Abgasgesetz.Aqueous solution of urea injects the exhaust emissions pipeline and reacts, and finally reaches to reduce the purpose that discharges pollutants.The whether abundant atomizing effect with being ejected into the aqueous solution of urea in the gas exhaust piping of this reaction has direct relation.
The model utility content
For above-mentioned prior art, the utility model provides a kind of gas auxiliary internal-combustion engine SCR atomization spray cap, the utility model shower nozzle can make the atomizing of aqueous solution of urea more even, fine and closely woven, and is applicable to the injection of aqueous solution of urea and pressurized air fluid-mixing.
In order to solve the problems of the technologies described above, the utility model gas auxiliary internal-combustion engine with the technological scheme that the SCR atomization spray cap is achieved is: comprise the nozzle, pipeline and the pipe interface that connect successively, be set with set screw nut on the described pipeline, be provided with retaining washer between described set screw nut and the described pipeline, be inlaid with the fan nozzle core in the described nozzle, described nozzle is provided with a plurality of spray-holes, described spray-hole axially consistent with the engine exhaust airflow direction.
Further, the utility model gas auxiliary internal-combustion engine SCR atomization spray cap, wherein, the number of spray-hole is three, the aperture of spray-hole is 0.5 ~ 1.0mm, is preferably 0.6mm; Hole pitch is 1.2 ~ 1.6mm.
Described retaining washer with between the described pipeline for the welding, between described retaining washer and the described set screw nut for closely cooperating.
Described fan nozzle core is made of the limb of two intersections, is equipped with the flow guide structure of rectangular indentation on each limb.
Each component in the utility model all adopt stainless steel.
Compared with prior art, the beneficial effects of the utility model are:
Because the nozzle core in the utility model shower nozzle is two crossing fan-shaped formations, therefore, jet-stream wind is continuous, and the atomizing of aqueous solution of urea is more even, fine and closely woven, can reach desirable jet atomization effect, thereby improves the transformation efficiency of catalytic reduction reaction.Even situation this shower nozzle less at pressure still has preferably atomizing effect, be difficult for producing and stop up, be difficult for producing urea crystals, the volume small flow is large, installs and fixes conveniently, and with low cost, reliability is high.
Description of drawings
Fig. 1 is the external structure schematic representation that the utility model gas auxiliary internal-combustion engine is used the SCR atomization spray cap;
Fig. 2 is the sectional view of shower nozzle shown in Figure 1;
Fig. 3-the 1st, the master of the core of fan nozzle shown in Fig. 2 looks enlarged view;
Fig. 3-the 2nd, the plan view of fan nozzle core shown in Fig. 3-1;
Fig. 3-the 3rd, the side view of fan nozzle core shown in Fig. 3-1.
Among the figure: 1-nozzle, 2-pipeline, 3-pipe interface, 4-retaining washer, 5-set screw nut, 6-fan nozzle core, 7-spray-hole.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.The accompanying drawing that provides is the schematic representation of simplification, basic structure of the present invention only is described in a schematic way, so it only shows the structure relevant with the utility model.
As depicted in figs. 1 and 2, the utility model gas auxiliary internal-combustion engine SCR atomization spray cap, comprise the nozzle 1, pipeline 2 and the pipe interface 3 that connect successively, be inlaid with fan nozzle core 6 in the described nozzle 1, shown in Fig. 3-1, Fig. 3-2 and Fig. 3-3, described fan nozzle core 6 is made of the limb of two intersections, be equipped with the flow guide structure of rectangular indentation on each limb, the design of fan-shaped nozzle core 6 can reach the effect that disperses and dredge aqueous solution of urea and pressurized air fluid-mixing in the nozzle 1, can make the aqueous solution of urea atomizing more even, fine and closely woven.Described nozzle 1 is provided with a plurality of spray-holes 7, be preferably three spray-holes, the aperture of spray-hole 7 is 0.5 ~ 1.0mm, hole pitch is 1.2 ~ 1.6mm, described spray-hole 7 axially be that the opening direction of spray-hole is all consistent with the engine exhaust airflow direction, thereby can reduce inner pressure surge, increase the continuity of jet-stream wind, improve its reliability.
Pipe interface in the utility model meets SAE J2044-2002 standard, can adopt rapid pipe joint to connect, and is convenient to the utility model and is connected with external equipment.Be set with set screw nut 5 on the described pipeline 2, be provided with retaining washer 4 between described set screw nut 5 and the described pipeline 2, described retaining washer 4 is with being welding between the described pipeline 2, and set screw nut 5 is movable members, during installation, can tighten set screw nut 5 according to the gas exhaust piping interface, retaining washer 4 is pressed on the outlet pipe, guarantee between described retaining washer 4 and the described set screw nut 5 as closely cooperating, thus the installation process of finishing.In addition, all parts in the utility model, such as: described nozzle 1, pipeline 2, pipe interface 3, retaining washer 4, set screw nut 5 and fan nozzle core 6 all adopt stainless steel, and anti-urea corrosion and resistant to elevated temperatures effect are arranged.
The utility model is a kind of gas auxiliary internal-combustion engine SCR atomization spray cap, can be used for spraying aqueous solution of urea and compressed-air actuated fluid-mixing.Use in the utility model shower nozzle process, aqueous solution of urea and compressed-air actuated fluid-mixing enter pipe interface 3, and the pipeline 2 of flowing through, and dispersion and drainage by fan nozzle core 6 are last by nozzle 1 even and continuous ejecting.
To sum up, the utility model reaches the better spray pattern of aqueous solution of urea by the combination of simple mechanical structure, the transformation efficiency of NOx under the equal operating conditions of Effective Raise.
Although the above is described the utility model in conjunction with figure; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; in the situation that does not break away from the utility model aim, can also make a lot of distortion, these all belong within the protection of the present utility model.
Claims (5)
1. gas auxiliary internal-combustion engine SCR atomization spray cap, comprise the nozzle (1), pipeline (2) and the pipe interface (3) that connect successively, be set with set screw nut (5) on the described pipeline (2), be provided with retaining washer (4) between described set screw nut (5) and the described pipeline (2), it is characterized in that, be inlaid with fan nozzle core (6) in the described nozzle (1), described nozzle (1) is provided with a plurality of spray-holes (7), described spray-hole (7) axially consistent with the engine exhaust airflow direction.
2. described gas auxiliary internal-combustion engine SCR atomization spray cap according to claim 1 is characterized in that the number of spray-hole (7) is three, and the aperture of spray-hole (7) is 0.5 ~ 1.0mm, and hole pitch is 1.2 ~ 1.6mm.
3. described gas auxiliary internal-combustion engine SCR atomization spray cap according to claim 1 is characterized in that, described retaining washer (4) is with being welding between the described pipeline (2), between described retaining washer (4) and the described set screw nut (5) for closely cooperating.
4. described gas auxiliary internal-combustion engine SCR atomization spray cap according to claim 1 is characterized in that described fan nozzle core (6) is made of the limb of two intersections, is equipped with the flow guide structure of rectangular indentation on each limb.
5. described gas auxiliary internal-combustion engine SCR atomization spray cap according to claim 1, it is characterized in that described nozzle (1), pipeline (2), pipe interface (3), retaining washer (4), set screw nut (5) and fan nozzle core (6) all adopt stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332385 CN202789031U (en) | 2012-07-10 | 2012-07-10 | Selective catalytic reduction (SCR) atomization spray-head for gas auxiliary internal-combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332385 CN202789031U (en) | 2012-07-10 | 2012-07-10 | Selective catalytic reduction (SCR) atomization spray-head for gas auxiliary internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789031U true CN202789031U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220332385 Expired - Fee Related CN202789031U (en) | 2012-07-10 | 2012-07-10 | Selective catalytic reduction (SCR) atomization spray-head for gas auxiliary internal-combustion engine |
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| CN (1) | CN202789031U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736607A (en) * | 2014-01-06 | 2014-04-23 | 上海丰禾精密机械有限公司 | Cleaning spraying nozzle and cleaning method for high pressure cleaner |
-
2012
- 2012-07-10 CN CN 201220332385 patent/CN202789031U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103736607A (en) * | 2014-01-06 | 2014-04-23 | 上海丰禾精密机械有限公司 | Cleaning spraying nozzle and cleaning method for high pressure cleaner |
| CN103736607B (en) * | 2014-01-06 | 2016-04-13 | 上海丰禾精密机械有限公司 | A kind of washer jet for jetting machine and cleaning method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20180710 |