CN210977643U - Urea mixer of engine - Google Patents
Urea mixer of engine Download PDFInfo
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- CN210977643U CN210977643U CN201922090461.3U CN201922090461U CN210977643U CN 210977643 U CN210977643 U CN 210977643U CN 201922090461 U CN201922090461 U CN 201922090461U CN 210977643 U CN210977643 U CN 210977643U
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Abstract
The utility model discloses an engine urea mixer belongs to engine exhaust after-treatment device technical field, has solved the inside mechanical structure that does not have any urea that can promote and mix with tail gas of current urea mixer, and has leaded to mixing the poor problem of effect. The mixer comprises a sleeve, wherein a mixing pipe is vertically inserted into the sleeve, a flow blocking baffle plate for connecting the mixing pipe and the sleeve to divide the sleeve into an air inlet port and an air outlet port is arranged between the mixing pipe and the sleeve, a plurality of vent holes for communicating the air inlet port with the air outlet port are arranged on the periphery of the upper part of the mixing pipe, an inclined plate which is obliquely arranged outwards is arranged on one side of each vent hole, and a spoiler connected with the inner wall of the sleeve is also arranged in the sleeve on one side of the air outlet port; the top of the mixing pipe is connected with a nozzle seat for installing a nozzle through a cover plate. The utility model discloses a mixer is applied to in the tail gas aftertreatment, makes reductant and engine exhaust intensive mixing even, has rationally optimized diesel engine aftertreatment system's structural arrangement.
Description
Technical Field
The utility model relates to an engine exhaust aftertreatment device technical field, more specifically says that it relates to an engine urea blender.
Background
Currently, diesel engines emit NOxThe post-treatment system adopts Selective Catalytic Reduction (SCR), and the working principle of the system is that a reducing agent (urea solution with the concentration of 32.5%) is sprayed into an engine exhaust pipe, and the urea is heated and decomposed into NH3，NH3And NOxReaction to N inside the SCR catalyst2And water, thereby achieving the purpose of reducing the NOx emission of the engine. The function of the mixer in the whole system is crucial, and the mixing effect of the urea and the tail gas is determined, so that the performance of the whole system is influenced.
The existing urea mixer is mostly a straight-through long pipe, and the inside of the mixer is not provided with any mechanical structure capable of promoting the mixing of urea and tail gas, and the mixer has a poor mixing effect although the structure is simple.
The existing mixers have the following disadvantages:
1. because a structure capable of promoting the mixing of urea and tail gas is not arranged, the requirement of the whole injection system on the atomizing capacity of the nozzle is high, the manufacturing difficulty of the nozzle is increased, and the manufacturing cost of the nozzle is increased;
2. in order to achieve the effect of fully mixing the urea and the tail gas, the length of the mixer is designed to be very long, and the urea has strong corrosivity, so that the material of the mixing pipe needs to be a stainless steel material with high corrosion resistance, and the problems of large material consumption, high cost and large system volume of the mixer are caused;
3. because the mixer is a straight-through long pipe, the tail gas in the mixer flows slowly, and the tail gas is easy to form crystals on the surface of the urea nozzle or the inner wall of the mixing pipe, so that the problem of pipeline blockage is caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to the above-mentioned of prior art, provides an engine urea blender, is applied to tail gas aftertreatment, makes reductant and engine exhaust intensive mixing even, the reasonable structural arrangement who optimizes diesel engine aftertreatment system.
The utility model adopts the technical proposal that: an engine urea mixer comprises a sleeve, wherein a mixing pipe is vertically inserted into the sleeve, a flow blocking baffle plate for connecting the mixing pipe and the sleeve to divide the sleeve into an air inlet port and an air outlet port is arranged between the mixing pipe and the sleeve, a plurality of vent holes for communicating the air inlet port with the air outlet port are arranged on the periphery of the upper part of the mixing pipe, an inclined plate which is obliquely arranged outwards is arranged on one side of each vent hole, and a spoiler connected with the inner wall of the sleeve is further arranged in the sleeve on one side of the air outlet port; the top of the mixing pipe is connected with a nozzle seat for installing a nozzle through a cover plate.
As a further improvement, the flow blocking baffle comprises a first flow blocking plate, a second flow blocking plate and a third flow blocking plate, the second flow blocking plate is horizontally arranged on the periphery of the middle part of the mixing pipe, the first flow blocking plate and the third flow blocking plate are vertically arranged, the top of the first flow blocking plate is connected with the second flow blocking plate, the periphery of the lower part of the first flow blocking plate is connected with the inner wall of the casing pipe, the bottom of the third flow blocking plate is connected with the second flow blocking plate, and the periphery of the lower part of the third flow blocking plate is connected with the inner wall of the casing pipe.
Furthermore, the first spoiler is a U-shaped plate with a convex middle part towards one side of the air inlet port, and correspondingly, the third spoiler is a U-shaped plate with a concave middle part towards one side of the air outlet port.
Further, the bottom of the mixing pipe is provided with a steel wire ball.
Furthermore, a gas collecting groove is formed in the center of the spoiler, and a plurality of gas outlet holes are formed in the gas collecting groove.
Furthermore, a plurality of turbulent flow grooves are uniformly formed in the turbulent flow plate on the periphery of the gas collecting groove.
Further, the vent hole is a long hole extending along the axial direction of the mixing pipe, and correspondingly, the inclined plate is a long plate extending along the axial direction of the mixing pipe.
Furthermore, a plurality of auxiliary air inlets are formed in the mixing pipe above the vent holes.
Further, the axis of the mixing tube is perpendicular to and intersects the axis of the sleeve.
Advantageous effects
Compared with the prior art, the utility model, have following advantage:
1. the utility model discloses an engine urea blender, be applied to in the tail gas aftertreatment, increase the hybrid tube rather than arranging perpendicularly at the intraductal cover, through the choked flow baffle, the design of air vent and swash plate, make tail gas earlier through the choked flow baffle change flow direction, pass through the swash plate block get into in the hybrid tube with the form of spiral air current with urea contact, make reductant and engine exhaust intensive mixing even, the length of blender has been shortened, production material and cost have been reduced, and whole injection system's volume, the reasonable structural arrangement who optimizes diesel engine aftertreatment system.
2. The utility model discloses an add the spoiler again in the sleeve pipe of port one side of giving vent to anger for the mist after mixing discharges through striking vortex once more, further improves and mixes the effect, and sets up the vortex groove on the spoiler, can strike the air current once more and change the air current flow direction, further improves and mixes the effect.
3. The utility model discloses still set up the steel wire ball bottom the hybrid tube, when satisfying gas and passing through the requirement, further improve the mixed effect, impurity in the partial tail gas can be filtered simultaneously, further improve the emission effect.
Drawings
Fig. 1 is a schematic view of the structure of the present invention;
fig. 2 is a left side view structure diagram of the present invention;
fig. 3 is a schematic diagram of the right-side view structure of the present invention;
FIG. 4 is a schematic top view of the mixing tube assembly of the present invention;
fig. 5 is an exploded view of the present invention.
Wherein: the air inlet and outlet device comprises a sleeve 1, a mixing pipe 2, an air inlet 3, an air outlet 4, an air vent 5, an air vent 6, an inclined plate 7, a spoiler 8, a cover plate 9, a nozzle seat 10, a first spoiler 11, a second spoiler 12, a third spoiler 12, a steel wire ball 13, a gas collecting groove 14, an air outlet 15, a flow disturbing groove 16 and an auxiliary air inlet 17.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 1-5, the utility model discloses an engine urea mixer, including sleeve 1, sleeve 1 is the cavity pipeline, it is used for connecting with the tail gas delivery pipe, the mixing tube 2 is inserted perpendicularly in sleeve 1, mixing tube 2 is the cavity pipeline, be equipped with the choked flow baffle that links to each other the two between mixing tube 2 and sleeve 1 in order to separate sleeve 1 into inlet port 3 and outlet port 4, the choked flow baffle separates sleeve 1 into two closed cavitys, be equipped with a plurality of air vents 5 that communicate inlet port 3 and outlet port 4 in the periphery of mixing tube 2 upper portion, make the tail gas only get into mixing tube 2 through air vent 5 and arrange to outlet port 4 in, all be equipped with the swash plate 6 of slope arrangement on one side of every air vent 5, the tail gas blocks through the swash plate 6, the slope cuts into mixing tube 2, and form the spiral air current, still be equipped with the spoiler 7 that links to each other with sleeve 1 inner wall in outlet port 4 one side in sleeve 1, the spoiler 7 can block and impact the mixed gas to further improve the mixing effect; the top of the mixing pipe 2 is connected with a nozzle holder 9 for installing a nozzle through a cover plate 8, so that the urea nozzle is convenient to install, and urea can be ensured to be sprayed into the mixing pipe 2 to be in contact with tail gas for mixed reaction.
Specifically, the flow blocking baffle comprises a first flow blocking plate 10, a second flow blocking plate 11 and a third flow blocking plate 12, wherein the second flow blocking plate 11 is horizontally arranged on the periphery of the middle part of the mixing pipe 2, the first flow blocking plate 10 and the third flow blocking plate 13 are vertically arranged, the top of the first flow blocking plate 10 is connected with the second flow blocking plate 11, the periphery of the lower part of the first flow blocking plate 10 is connected with the inner wall of the casing pipe 1, the bottom of the third flow blocking plate 12 is connected with the second flow blocking plate 11, the periphery of the lower part of the third flow blocking plate 12 is connected with the inner wall of the casing pipe 1, the three flow blocking plates block the circulation of the tail gas, and the tail gas can be guided to enter from the vent holes 5 of the mixing pipe 2, so that the purpose.
Preferably, the first spoiler 10 is a U-shaped plate with a convex middle portion toward the inlet port 3 side, and the exhaust gas collides with the convex U-shaped plate to perform collision and dispersion on the air flow, and correspondingly, the third spoiler 12 is a U-shaped plate with a concave middle portion toward the outlet port 4 side, and the exhaust gas collides with the concave U-shaped plate to perform convergence and diversion on the air flow, so as to introduce the vent holes 5.
Preferably, be equipped with steel wire ball 13 in the 2 bottoms of hybrid tube, this steel wire ball 13 is stainless steel wire ball, and the accessible supports steel wire ball 13 in 2 bottoms fixed mounting supports of hybrid tube to the dismouting is changed, through steel wire ball 13's setting, when satisfying gas and passing through the requirement, further improves the mixed effect, can filter the impurity in the partial tail gas simultaneously, further improves and discharges the effect.
Preferably, the spoiler 7 is a circular plate matched with the inner wall of the sleeve 1, the gas collecting groove 14 is formed in the center of the spoiler 7, the gas collecting groove 14 is a circular groove and can collect the mixed gas to the center of the spoiler 7, and the gas collecting groove 14 is internally provided with a plurality of gas outlet holes 15 so as to facilitate discharge of the mixed gas.
Preferably, a plurality of turbulence grooves 16 are uniformly arranged on the spoiler 7 at the periphery of the gas collecting groove 14, the cross section of each turbulence groove 16 is composed of two sections of parabolas with different eccentricities, mixed gas enters the turbulence grooves 16 after impacting the spoiler 7, then flows back out of the turbulence grooves 16, and is finally discharged from the gas collecting groove 14, so that the mixed gas can impact gas flow again and change the flow direction of the gas flow, and the mixing effect is further improved.
Preferably, the vent holes 5 are long holes extending in the axial direction of the mixing pipe 2, and correspondingly, the inclined plate 6 is a long plate extending in the axial direction of the mixing pipe 2, ensuring the intake air flow rate.
Preferably, a plurality of auxiliary air intake holes 17 are further formed in the mixing pipe 2 above the vent holes 5 to assist air intake and ensure the flow rate of intake air.
Preferably, the axial line of the mixing pipe 2 is perpendicular to and intersects with the axial line of the sleeve 1, and the volume of the mixing pipe 2 is increased, so that the mixing volume of the tail gas and the urea is increased, and the mixing effect is further improved.
When the engine urea mixer is used, tail gas enters the sleeve 1 from the air inlet port 3, is changed in direction under the blocking of the first spoiler 10, the second spoiler 11 and the third spoiler 12 and is guided to the vent hole 5 to enter the mixing pipe 2, so that the tail gas enters the mixing pipe 2 in a spiral airflow mode, and at the moment, the urea nozzle sprays urea into the mixing pipe 2 to be in contact reaction with the tail gas for mixing; then the mixed gas flows along the bottom of the mixing pipe 2 and is discharged to the gas outlet port 4 through the steel wire ball 13, the mixed gas continues to flow into the spoiler 7, and then collides with the turbulent flow groove 16 again, is collected to the gas collecting groove 14 and is discharged from the gas outlet hole 15, thereby achieving the purpose of tail gas treatment. The utility model discloses an engine urea blender, be applied to in the tail gas aftertreatment, increase the hybrid tube rather than arranging perpendicularly at the intraductal cover, through the choked flow baffle, the design of air vent and swash plate, make tail gas earlier through the choked flow baffle change flow direction, pass through the swash plate block get into in the hybrid tube with the form of spiral air current with urea contact, make reductant and engine exhaust intensive mixing even, the length of blender has been shortened, production material and cost have been reduced, and whole injection system's volume, the reasonable structural arrangement who optimizes diesel engine aftertreatment system.
The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.
Claims (9)
1. An engine urea mixer comprises a sleeve (1) and is characterized in that a mixing pipe (2) is vertically inserted into the sleeve (1), a flow blocking baffle plate which is used for connecting the mixing pipe (2) and the sleeve (1) to divide the sleeve (1) into an air inlet port (3) and an air outlet port (4) is arranged between the mixing pipe (2) and the sleeve (1), a plurality of vent holes (5) which are used for communicating the air inlet port (3) with the air outlet port (4) are arranged on the periphery of the upper part of the mixing pipe (2), an inclined plate (6) which is obliquely arranged outwards is arranged on one side of each vent hole (5), and a spoiler (7) which is connected with the inner wall of the sleeve (1) is also arranged in the sleeve (1) on one side of the air outlet port (4); the top of the mixing pipe (2) is connected with a nozzle seat (9) for installing a nozzle through a cover plate (8).
2. The engine urea mixer according to claim 1, wherein the flow blocking baffle comprises a first flow blocking plate (10), a second flow blocking plate (11) and a third flow blocking plate (12), the second flow blocking plate (11) is horizontally installed at the middle periphery of the mixing pipe (2), the first flow blocking plate (10) and the third flow blocking plate (12) are vertically arranged, the top of the first flow blocking plate (10) is connected with the second flow blocking plate (11), the lower periphery of the first flow blocking plate (10) is connected with the inner wall of the casing pipe (1), the bottom of the third flow blocking plate (12) is connected with the second flow blocking plate (11), and the lower periphery of the third flow blocking plate (12) is connected with the inner wall of the casing pipe (1).
3. An engine urea mixer according to claim 2, characterized in that said first baffle (10) is a U-shaped plate with a convex middle part towards the inlet port (3) side, and correspondingly said third baffle (12) is a U-shaped plate with a concave middle part towards the outlet port (4) side.
4. An engine urea mixer according to claim 1, characterized in that the bottom of said mixing pipe (2) is provided with steel wool (13).
5. An engine urea mixer according to claim 1, characterized in that the spoiler (7) is centrally provided with a gas collecting channel (14), and the gas collecting channel (14) is provided with a plurality of gas outlet holes (15).
6. An engine urea mixer according to claim 5, characterized in that a plurality of turbulence grooves (16) are uniformly arranged on the turbulence plate (7) at the periphery of the gas collecting groove (14).
7. An engine urea mixer according to any of claims 1-6, characterized in that said venting holes (5) are elongated holes extending in the axial direction of the mixing pipe (2), and correspondingly said sloping plate (6) is an elongated plate extending in the axial direction of the mixing pipe (2).
8. The engine urea mixer as claimed in claim 7, wherein a plurality of auxiliary air intake holes (17) are further opened on the mixing pipe (2) above the vent hole (5).
9. An engine urea mixer according to claim 1, characterized in that the axis of the mixing pipe (2) is perpendicular to and intersects the axis of the sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922090461.3U CN210977643U (en) | 2019-11-28 | 2019-11-28 | Urea mixer of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922090461.3U CN210977643U (en) | 2019-11-28 | 2019-11-28 | Urea mixer of engine |
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| Publication Number | Publication Date |
|---|---|
| CN210977643U true CN210977643U (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922090461.3U Active CN210977643U (en) | 2019-11-28 | 2019-11-28 | Urea mixer of engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725733A (en) * | 2019-11-28 | 2020-01-24 | 广西玉柴机器股份有限公司 | Urea mixer of engine |
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2019
- 2019-11-28 CN CN201922090461.3U patent/CN210977643U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725733A (en) * | 2019-11-28 | 2020-01-24 | 广西玉柴机器股份有限公司 | Urea mixer of engine |
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