CN214416721U - Nozzle structure for reducing spray particle size - Google Patents
Nozzle structure for reducing spray particle size Download PDFInfo
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- CN214416721U CN214416721U CN202023116394.7U CN202023116394U CN214416721U CN 214416721 U CN214416721 U CN 214416721U CN 202023116394 U CN202023116394 U CN 202023116394U CN 214416721 U CN214416721 U CN 214416721U
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Abstract
The utility model discloses a nozzle structure for reducing the spraying particle size, which consists of an electromagnet component and a nozzle component, wherein the nozzle component comprises an oil filter screen bracket, an iron core, a spring upper seat, a spring, a nozzle body and a valve rod component assembled in the nozzle body from top to bottom in sequence; the valve rod component comprises a spring lower seat, a valve rod, an armature, a sealing steel ball, a nozzle head and a nozzle plate, wherein a plurality of spray hole grooves and a plurality of spray holes are uniformly distributed on the nozzle plate in the circumferential direction, and each spray hole is positioned in each spray hole groove; the circle centers of the circumferences of all the jet holes are concentric with the center of the nozzle hole on the nozzle head, the diameters of the circumferences of all the jet holes are larger than the inner diameter of the nozzle hole, and the diameters of the circumferences of the inner sides of all the jet hole grooves are smaller than the inner diameter of the nozzle hole. The solution can enter the spray hole groove under the pressure effect first, form stable torrent, later extrude through the orifice and spray away, and the shape of spray hole groove has apparent effect to improving spray atomization effect and SMD particle diameter in addition.
Description
Technical Field
The utility model relates to a nozzle technical field in the SCR system, in particular to reduce nozzle structure of spraying particle diameter.
Background
At present, the diesel engine tail gas treatment technology mostly adopts the selective catalytic reduction SCR technology, a very important component in an SCR system is a nozzle for spraying reducing agent solution, and the structure of the nozzle influences the spray particle size of the reducing solution sprayed by the nozzle, so that the SCR denitration effect is directly influenced.
At present, the atomizing effect of the reducing solution sprayed by a nozzle used in the domestic SCR system under constant pressure is poor, the reducing solution cannot be fully combined with nitrogen oxides and micro-smoke particles in tail gas to react, the discharge amount of pollutants is high and difficult, and the reducing solution cannot adapt to the gradual upgrade of the current discharge standard.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the atomization effect of the reducing solution sprayed by the existing nozzle under the constant pressure is relatively poor and providing a nozzle structure for reducing the spraying particle diameter.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is:
a nozzle structure for reducing the spray particle size comprises an electromagnet component and a nozzle component, wherein the nozzle component comprises an oil filter screen bracket, an iron core, a spring upper seat, a spring, a nozzle body and a valve rod component assembled in the nozzle body from top to bottom in sequence; a filter screen is assembled in an inner hole of the oil filter screen support, the iron core is fixed at the lower end of the oil filter screen support, the iron core is pressed into an upper spring seat in an interference fit mode, the lower end of the iron core is fixedly connected with the nozzle body, and the spring is installed between the upper spring seat and the valve rod component; the lower part of the oil filter screen bracket, the iron core and the upper part of the nozzle body are pressed in the electromagnet of the electromagnet component; the valve rod component comprises a lower spring seat, a valve rod, an armature, a sealing steel ball, a nozzle head and a nozzle plate, wherein the lower spring seat and the armature are fixed at the upper end of the valve rod from top to bottom, the spring is sleeved at the upper end of the valve rod and positioned between the upper spring seat and the lower spring seat, the nozzle head and the nozzle plate are pressed at the lower part of the nozzle body, and the sealing steel ball closes and opens a nozzle hole on the nozzle head through the valve rod; the circle centers of the circumferences of all the jet holes are concentric with the center of the nozzle hole on the nozzle head, the diameters of the circumferences of all the jet holes are larger than the inner diameter of the nozzle hole, and the diameters of the circumferences of the inner sides of all the jet hole grooves are smaller than the inner diameter of the nozzle hole.
In a preferred embodiment of the present invention, the depth of each nozzle hole groove is 1/2-3/5 of the thickness of the nozzle plate.
In a preferred embodiment of the present invention, each nozzle hole is located on a centerline of the corresponding nozzle hole groove.
In a preferred embodiment of the present invention, each nozzle hole is located outside the corresponding nozzle hole groove and is offset from the center line of the corresponding nozzle hole groove.
In a preferred embodiment of the present invention, the angle between the axis of each nozzle hole and the central axis of the nozzle plate is 26 °, and the inner diameter of each nozzle hole is 0.13 mm.
In a preferred embodiment of the present invention, the nozzle hole groove is a special-shaped groove.
Since the technical scheme as above is used, the utility model discloses the diameter of all orifice place circumferences is greater than the diameter of nozzle hole, the diameter of all orifice inslot side circumference is less than the internal diameter of nozzle hole, solution can advance into the orifice groove under the pressure effect, form stable torrent, later go out through the orifice extrusion injection, the shape in orifice groove has apparent effect to improving spray atomization effect and SMD particle diameter in addition. The utility model discloses nozzle simple structure extrudees solution again through predetermineeing the spout hole groove and sprays, has improved atomization effect.
Drawings
Fig. 1 is a sectional view of the nozzle structure for reducing the spray particle size of the nozzle according to the present invention.
Fig. 2 is a schematic structural view of a nozzle plate according to embodiment 1 of the present invention.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is a schematic structural view of a nozzle plate according to embodiment 2 of the present invention.
Fig. 5 is a sectional view a-a of fig. 4.
Fig. 6 is a schematic structural view of a nozzle plate according to embodiment 3 of the present invention.
Fig. 7 is a sectional view a-a of fig. 6.
Fig. 8 is a schematic structural view of a nozzle plate according to embodiment 4 of the present invention.
Fig. 9 is a sectional view a-a of fig. 8.
Detailed Description
The invention is further described below with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, the nozzle structure for reducing the spray particle size of the nozzle shown in the figure is composed of an electromagnet component and a nozzle component.
The nozzle component comprises an oil screen bracket 7, an iron core 14, a spring upper seat 8, a spring 9, a nozzle body 2 and a valve rod component assembled in the nozzle body 2 from top to bottom in sequence.
The inner hole of the oil filter screen bracket 7 is provided with a filter screen 15, and the groove of the excircle is provided with an O-shaped sealing ring 6. The iron core 14 is fixed at the lower end of the oil filter screen bracket 7, and the iron core and the oil filter screen bracket are fixed by laser continuous welding.
The iron core 14 is pressed into the spring upper seat 8 in an interference fit mode, the lower end of the iron core 14 is fixedly connected with the nozzle body 2, and the iron core and the nozzle body are fixed through laser continuous welding. A spring 9 is fitted between the spring upper seat 8 and the valve stem member.
The lower part of the oil screen bracket 7, the iron core 14 and the upper part of the nozzle body 2 are pressed in the electromagnet 3 of the electromagnet component and then fixed by adopting a laser electric welding mode. The nozzle body 2 in the nozzle component and the electromagnet 3 in the electromagnet component are sealed by a rectangular sealing ring 4 and an O-shaped sealing ring 5. The nozzle body 2 is also provided with a rectangular seal ring 1.
The valve rod component comprises a lower spring seat 16, a valve rod 11, an armature 10, a sealing steel ball 17, a nozzle head 12 and a nozzle plate 13, wherein the lower spring seat 16 and the armature 10 are fixed at the upper end of the valve rod 11 from top to bottom, and through holes are uniformly distributed on the armature 10. The spring 9 is sleeved on the upper end of the valve rod 11 and positioned between the upper spring seat 8 and the lower spring seat 16, the nozzle head 12 and the nozzle plate 13 are pressed on the lower part of the nozzle body 2, and the sealing steel ball 17 closes and opens the nozzle hole 12a on the nozzle head 12 through the valve rod 11.
The utility model is characterized in that: a plurality of nozzle holes 13a and a plurality of nozzle holes 13b are circumferentially and uniformly distributed in the nozzle plate 13, the nozzle holes 13a are located on the side of the nozzle plate 13 facing the nozzle head 12, and each nozzle hole 13b is located in each nozzle hole 13 a; the center of the circle of all the nozzle holes 13b is concentric with the center of the nozzle hole 12a on the nozzle head 12, the diameter of the circle of all the nozzle holes 13b is larger than the inner diameter of the nozzle hole 12a, and the diameter of the circle of the inner side of all the nozzle hole grooves 13a is smaller than the inner diameter of the nozzle hole 12 a.
The relationship between the nozzle plate and the nozzle head is described below by way of example.
Example 1
Referring to fig. 2 and 3, six nozzle holes 13a and six nozzle holes 13b are circumferentially uniformly distributed on a surface of nozzle plate 13 facing nozzle head 12, and the six nozzle holes 13a are each a shown irregularly shaped groove. Six nozzle holes 13a are distributed in an array along the circumference of the nozzle plate 13, each nozzle hole 13b is positioned in the corresponding nozzle hole 13a and on the center line of the corresponding nozzle hole 13a, the circle center of the circumference where the six nozzle holes 13b are positioned is concentric with the center of the nozzle hole 12a on the nozzle head 12, the diameter of the circumference where the six nozzle holes 13b are positioned is larger than the inner diameter of the nozzle hole 12a, and the diameter of the circumference where the inner sides of the six nozzle holes 13a are positioned is smaller than the inner diameter of the nozzle hole 12 a. The depth of the six jet hole grooves 13a accounts for 3/5 of the thickness of the nozzle plate 13, the diameter of the jet holes 13b is 0.13mm, and the included angle between the axis of each jet hole 13b and the central axis of the nozzle plate 13 is 26 degrees, namely the jet hole angle is 26 degrees.
Example 2
Referring to fig. 4 and 5, three nozzle holes 13a and three nozzle holes 13b are circumferentially evenly distributed on a surface of nozzle plate 13 facing nozzle head 12, and each of the three nozzle holes 13a is a shown irregularly shaped groove. The three nozzle holes 13a are distributed in an array along the circumference of the nozzle plate 13, each nozzle hole 13b is located in the corresponding nozzle hole 13a and located on the center line of the corresponding nozzle hole 13a, the circle center of the circle where the three nozzle holes 13b are located is concentric with the center of the nozzle hole 12a on the nozzle head 12, the diameter of the circle where the three nozzle holes 13b are located is larger than the inner diameter of the nozzle hole 12a, and the diameter of the circle where the inner sides of the three nozzle holes 13a are located is smaller than the inner diameter of the nozzle hole 12 a. The depth of the three jet hole grooves 13a accounts for 1/2 of the thickness of the nozzle plate 13, the diameter of the jet holes 13b is 0.13mm, and the included angle between the axis of each jet hole 13b and the central axis of the nozzle plate 13 is 26 degrees, namely the jet hole angle is 26 degrees.
Example 3
Referring to fig. 6 and 7, six nozzle holes 13a and six nozzle holes 13b are circumferentially uniformly distributed on a surface of nozzle plate 13 facing nozzle head 12, and the six nozzle holes 13a are each a shown irregularly shaped groove. Six nozzle holes 13a are distributed in an array along the circumference of the nozzle plate 13, each nozzle hole 13b is located on the outer side in the corresponding nozzle hole 13a and deviates from the lower right corner of the midline of the corresponding nozzle hole 13a, the circle center of the circle where the six nozzle holes 13b are located is concentric with the center of the nozzle hole 12a on the nozzle head 12, the diameter of the circle where the six nozzle holes 13b are located is larger than the inner diameter of the nozzle hole 12a, and the diameter of the circle where the inner sides of the six nozzle holes 13a are located is smaller than the inner diameter of the nozzle hole 12 a. The depth of the six jet hole grooves 13a accounts for 3/5 of the thickness of the nozzle plate 13, the diameter of the jet holes 13b is 0.13mm, and the included angle between the axis of each jet hole 13b and the central axis of the nozzle plate 13 is 26 degrees, namely the jet hole angle is 26 degrees.
Example 4
Referring to fig. 8 and 9, six nozzle holes 13a and six nozzle holes 13b are circumferentially uniformly distributed on a surface of nozzle plate 13 facing nozzle head 12, and the six nozzle holes 13a are each a shown irregularly shaped groove. Six nozzle holes 13a are distributed in an array along the circumference of the nozzle plate 13, each nozzle hole 13b is positioned at the outer side in the corresponding nozzle hole 13a and deviates from the upper left corner of the center line of the corresponding nozzle hole 13a, the circle center of the circle where the six nozzle holes 13b are positioned is concentric with the center of the nozzle hole 12a on the nozzle head 12, the diameter of the circle where the six nozzle holes 13b are positioned is larger than the inner diameter of the nozzle hole 12a, and the diameter of the circle where the inner sides of the six nozzle holes 13a are positioned is smaller than the inner diameter of the nozzle hole 12 a. The depth of the six jet hole grooves 13a accounts for 3/5 of the thickness of the nozzle plate 13, the diameter of the jet holes 13b is 0.13mm, and the included angle between the axis of each jet hole 13b and the central axis of the nozzle plate 13 is 26 degrees, namely the jet hole angle is 26 degrees.
The utility model discloses a theory of operation:
the reducing solution is filtered by the filter screen 15 and then enters an inner hole of the oil filter screen support 7, flows through the oil filter screen support 7 and the spring upper seat 8, then enters the nozzle body 2 through holes uniformly distributed on the armature 10, and the sealing steel ball 17 is matched with a sealing conical surface of a nozzle hole 12a in the nozzle head 12 under the action of a pre-pressing spring force to prevent leakage. After the electromagnet 3 of the electromagnet component is electrified, the armature 10 is attracted by the electromagnetic force to drive the valve rod 11 to move upwards, the stroke is the gap between the armature 10 and the iron core 16, and the magnitude of the jet flow can be adjusted by adjusting the value of the gap.
The valve rod 11 moves upwards, the sealing steel ball 17 and the sealing conical surface of the nozzle hole 12a in the nozzle head 12 are opened, the solution enters a cavity formed by the nozzle head 12 and the nozzle plate 13, as the inner diameter of the nozzle hole 12a of the nozzle head 12 is smaller than the center distance between the nozzle hole 13b on the nozzle plate 13 and the nozzle plate 13, the solution enters the nozzle hole groove 13a under the action of pressure to form stable turbulence and is extruded and sprayed out through the nozzle hole 13b, and the shape of the nozzle hole groove 13a has remarkable effects on improving the spray atomization effect and the SMD particle size; the electromagnet 3 is powered off, the valve rod 11 moves downwards under the action of the spring force of the spring 9 to push the sealing steel ball 17 to reset, the sealing steel ball 17 is matched with the sealing conical surface of the nozzle hole 12a in the nozzle head 12 again for sealing, and the injection is finished, so that an injection cycle is formed. The utility model discloses nozzle simple structure extrudees solution again through predetermineeing spout hole groove 13a and sprays, has improved atomization effect.
Claims (6)
1. A nozzle structure for reducing the spray particle size comprises an electromagnet component and a nozzle component, wherein the nozzle component comprises an oil filter screen bracket, an iron core, a spring upper seat, a spring, a nozzle body and a valve rod component assembled in the nozzle body from top to bottom in sequence; a filter screen is assembled in an inner hole of the oil filter screen support, the iron core is fixed at the lower end of the oil filter screen support, the iron core is pressed into an upper spring seat in an interference fit mode, the lower end of the iron core is fixedly connected with the nozzle body, and the spring is installed between the upper spring seat and the valve rod component; the lower part of the oil filter screen bracket, the iron core and the upper part of the nozzle body are pressed in the electromagnet of the electromagnet component; the valve rod component comprises a lower spring seat, a valve rod, an armature, a sealing steel ball, a nozzle head and a nozzle plate, wherein the lower spring seat and the armature are fixed at the upper end of the valve rod from top to bottom, the spring is sleeved at the upper end of the valve rod and positioned between the upper spring seat and the lower spring seat, the nozzle head and the nozzle plate are pressed at the lower part of the nozzle body, and the sealing steel ball closes and opens a nozzle hole on the nozzle head through the valve rod; the circle centers of the circumferences of all the jet holes are concentric with the center of the nozzle hole on the nozzle head, the diameters of the circumferences of all the jet holes are larger than the inner diameter of the nozzle hole, and the diameters of the circumferences of the inner sides of all the jet hole grooves are smaller than the inner diameter of the nozzle hole.
2. The nozzle structure for reducing the particle size of spray according to claim 1, wherein the depth of each orifice groove is 1/2 to 3/5 of the thickness of the nozzle plate.
3. The spray tip configuration for reducing spray particle size of claim 2, wherein each orifice is located on a centerline of the corresponding orifice channel.
4. The nozzle arrangement for reducing spray particle size of claim 2, wherein each orifice is located outside of the corresponding orifice channel and offset from the centerline of the corresponding orifice channel.
5. A spray nozzle arrangement for reducing the size of a spray according to any one of claims 1 to 4, wherein the axis of each orifice is at an angle of 26 ° to the central axis of the nozzle plate, and the internal diameter of each orifice is 0.13 mm.
6. The structure of claim 5, wherein the orifice groove is a shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023116394.7U CN214416721U (en) | 2020-12-22 | 2020-12-22 | Nozzle structure for reducing spray particle size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023116394.7U CN214416721U (en) | 2020-12-22 | 2020-12-22 | Nozzle structure for reducing spray particle size |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214416721U true CN214416721U (en) | 2021-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023116394.7U Active CN214416721U (en) | 2020-12-22 | 2020-12-22 | Nozzle structure for reducing spray particle size |
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| Country | Link |
|---|---|
| CN (1) | CN214416721U (en) |
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- 2020-12-22 CN CN202023116394.7U patent/CN214416721U/en active Active
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