CN114273045A - Swirl nozzle for jet mill - Google Patents
Swirl nozzle for jet mill Download PDFInfo
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- CN114273045A CN114273045A CN202111410576.1A CN202111410576A CN114273045A CN 114273045 A CN114273045 A CN 114273045A CN 202111410576 A CN202111410576 A CN 202111410576A CN 114273045 A CN114273045 A CN 114273045A
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- jet mill
- flow guide
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- 238000005452 bending Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The invention discloses a swirl nozzle for an airflow mill, which comprises: the shell is in a conical tube shape, and the shell is sequentially provided with an internal thread, a counter bore, a conical hole, a conical surface and an air outlet hole from the top to the bottom; the flow guide net is used for converting high-pressure gas into high-speed rotating airflow; the clamping ring is of a circular tube structure, an external thread is arranged at one end of the clamping ring, the external thread is matched with the internal thread, the other end of the clamping ring is pressed on the end face of the circular ring, and the clamping ring is provided with at least one pair of rectangular grooves. According to the invention, the conical shell is designed and the flow guide net is combined, so that high-pressure airflow is converted into high-speed rotating airflow, the injection speed is obviously increased compared with that of the traditional nozzle structure, the crushing effect on materials is effectively improved, the crushing granularity of the materials is smaller under the condition of using the same power or improving the same pressure, the production cost can be effectively saved, and the maintenance cost of equipment can be reduced.
Description
Technical Field
The invention belongs to the technical field of fluidized bed type jet mills, and particularly relates to a swirl nozzle for a jet mill.
Background
The fluidized bed type jet mill injects high-pressure gas into a crushing area of a fluidized bed through a nozzle to enable materials to be in a suspension state, and the materials are accelerated by the high-pressure gas and then continuously collide with each other in the crushing area to be crushed.
At present, a commonly used nozzle is a Laval nozzle, the inner wall of the nozzle is of a smooth structure, the commonly used Laval nozzle cannot meet the requirement along with the smaller and smaller granularity of the crushed materials required by the market, for example, the materials can be crushed to be thinner only by continuously increasing the gas pressure during the production of ultrafine powder, but the energy consumption of the equipment is gradually increased along with the increase of the integral pressure, the requirements of all joints on the sealing performance are extremely high, and the production cost is increased.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the swirl nozzle for the jet mill, the helical-structured guide strips are arranged in the nozzle, and high-pressure gas is in a high-speed rotating state under the guidance of the guide strips, so that the injection speed of the high-pressure gas can be effectively increased under the condition of the same air inlet pressure, the crushing effect is improved, and the energy cost and the equipment cost are saved.
The technical scheme adopted by the invention for solving the problems is as follows:
a swozzle for a jet mill, comprising:
the shell is in a conical tube shape, and the shell is sequentially provided with an internal thread, a counter bore, a conical hole, a conical surface and an air outlet hole from the top to the bottom;
the flow guide net is used for converting high-pressure gas into high-speed rotating airflow;
the clamping ring, the clamping ring is the pipe structure, and its one end is equipped with the external screw thread, the external screw thread with interior screw-thread fit, the other end compress tightly in the ring terminal surface, the clamping ring has the terminal surface of external screw thread one end is equipped with at least a pair of rectangle recess.
Further, as a preferred technical scheme, the flow guide net comprises a circular ring and a conical ring, the circular ring and the conical ring are coaxially and parallelly arranged, a plurality of flow guide strips are arranged between the circular ring and the conical ring, each flow guide strip is of a spiral structure, the outline of the conical ring is of a conical structure and is attached to the conical surface, the circular ring is arranged in the counter bore, and the outer wall of each flow guide strip is attached to the inner surface of the conical bore.
Further, as a preferred technical scheme, the flow guide strips are uniformly distributed along the circumference of the circular ring.
Further, as a preferred technical scheme, the cross-sectional shape of the flow guide strip is rectangular.
Further, as a preferred technical scheme, the inner surface of the conical ring is conical, the bevel angle of the conical inner surface is the same as that of the conical outer surface, and one end of the flow guide strip is connected to the inner surface of the conical ring.
Further, as a preferred technical scheme, the guide strip is formed by bending and processing through a die and then connected to the circular ring and the conical ring in a welding mode.
Furthermore, as a preferred technical scheme, five diversion strips are uniformly distributed along the circumferences of the circular ring and the conical ring.
Further, as a preferred technical scheme, the swirl nozzle is installed on a fluidized bed of the jet mill through a connecting seat, the connecting seat is provided with a conical hole, the outer contour of the shell is in a conical structure and is attached to the conical hole, the connecting seat is connected with the air inlet pipe through threads, and the shell is tightly pressed in the conical hole through a port of the air inlet pipe.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention converts high-pressure airflow into high-speed rotating airflow by designing the conical shell and combining the flow guide net, the injection speed is obviously increased compared with the traditional nozzle structure, and the crushing effect on materials is effectively improved.
(2) The diversion strips and the shell are manufactured in a split mode, so that the processing difficulty of processing the diversion strips in the shell can be reduced, and the diversion strips are convenient to replace, disassemble and assemble.
Drawings
FIG. 1 is an exploded view of the structure of the present invention;
FIG. 2 is a longitudinal cross-sectional view of the present invention;
FIG. 3 is an end view of the present invention mounted to a connecting base;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic view of the present invention installed in a jet mill chamber.
The reference numbers in the figures correspond to the names:
10. the fluidized bed comprises a shell, 11, internal threads, 12, counter bores, 13, conical holes, 14, conical surfaces, 15, air outlet holes, 20, a flow guide net, 21, a circular ring, 22, a conical ring, 23, a flow guide strip, 30, a pressing ring, 31, external threads, 32, a groove, 40, a connecting seat, 50 and a fluidized bed.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are a part of the embodiments of the present invention, not all of the embodiments of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
As shown in fig. 1 and 2, a swirl nozzle for an air flow mill according to a preferred embodiment of the present invention includes:
the casing 10 is in a conical tube shape, the casing 10 is sequentially provided with an internal thread 11, a counter bore 12, a conical hole 13, a conical surface 14 and an air outlet hole 15 from the top to the bottom, the inner diameter of the internal thread 11 is larger than the diameter of the counter bore 12 so as to facilitate installation of the flow guide net 20, the diameter of the counter bore 12 is larger than the diameter of the large end of the conical hole 13, and a step is formed at the joint for limiting a circular ring 21 of the flow guide net 20.
A flow guide net 20 for converting high-pressure gas into high-speed rotating gas flow;
In the embodiment, the shell 10, the flow guide net 20 and the pressure ring 30 are made of stainless steel, so that the cleaning is convenient, the corrosion can be prevented, and the structural strength is high; the high-pressure air flow enters from the top of the shell 10, and is converted into high-speed rotating air flow under the flow guiding action of the flow guiding net 20, the spraying speed is obviously increased compared with the traditional nozzle structure, and the crushing effect on the materials is effectively improved.
Example 2
As shown in fig. 1 and fig. 2, this embodiment provides an innovative design of a flow guide net based on embodiment 1, and the specific structure is as follows: the flow guide net 20 comprises a circular ring 21 and a conical ring 22, the circular ring 21 and the conical ring 22 are coaxially and parallelly arranged, a plurality of flow guide strips 23 are arranged between the circular ring 21 and the conical ring 22, the flow guide strips 23 are of a spiral structure, the outer contour of the conical ring 22 is of a conical structure and is attached to the conical surface 14, the circular ring 21 is arranged in the counter bore 12, the outer walls of the flow guide strips 23 are attached to the inner surface of the conical hole 13, namely the whole flow guide net 20 is also of a conical structure, the inclination angle of the contour of the flow guide strips is the same as that of the conical hole 13, the air can be further pressurized through the gradually reduced ventilation area, the outlet air pressure of the nozzle is improved, and the air flow speed is increased; the outer contour of the conical ring 22 is in a conical structure and is attached to the conical surface 14, the conical surface 14 is used for positioning the conical ring 22, and the air guide sleeve 20 is ensured to be coaxial with the shell 10 and the conical hole 13, so that each air guide strip 23 is ensured to be attached to each part of the conical hole 13, a large gap is avoided between each air guide strip 23 and the inner wall of the conical hole 13, unnecessary turbulence generated by high-pressure gas is prevented from influencing the air flow speed, and therefore stable and rotary high-speed air flow is obtained and can better act on materials.
Preferably, in order to obtain a better high-speed rotating airflow, the setting position of the guide strip 23 is optimally designed in the embodiment, specifically, the guide strip 23 is uniformly distributed along the circumference of the circular ring 21, and through such a structural design, the generation of turbulent flow can be greatly reduced, so that the high-speed rotating airflow is more concentrated, the speed is higher, and a better material crushing effect is conveniently obtained.
Preferably, the cross-sectional shape of the air guide bar 23 is designed to be rectangular in this embodiment, and through a great deal of experimental research, the inventor finds that when the cross-sectional shape of the air guide bar 23 is rectangular, the high-speed rotating airflow generated by the high-speed airflow passing through the air guide bar 23 is fastest and the turbulent flow is least under the same pressure condition.
Preferably, the inner surface of the conical ring 22 of this embodiment is designed to be conical, the bevel angle of the conical inner surface is the same as the bevel angle of the conical outer surface, and one end of the flow guide strip 23 is connected to the inner surface of the conical ring 22. When the gas flows to the conical ring 22 from the flow guide strips 23, the gas can be guided by the conical structure on the inner surface of the conical ring 22 and smoothly passes through the conical structure, so that the phenomenon that the pressure and the speed of gas ejection are weakened due to the resistance of the step and flange structures to the gas is avoided, and better high-speed rotating gas flow can be obtained.
The guide strip 23 of the embodiment is formed by bending and processing through a die, is subjected to aging stress relief treatment to prevent deformation, and is connected to the circular ring 21 and the conical ring 22 in a welding manner.
Preferably, five guide strips 23 are arranged in the present embodiment, and the five guide strips 23 are uniformly distributed along the circumferences of the circular ring 21 and the conical ring 22, it should be noted that, in the present embodiment, 5 guide strips 23 are not arranged randomly or arranged commonly, but through experimental research, it is found that when 5 guide strips 23 are uniformly arranged between the circumferences of the circular ring 21 and the conical ring 22, the air flow is not affected to pass through the housing 10, and meanwhile, the optimal high-speed rotating air flow can be obtained.
Example 3
As shown in fig. 4, 5 and 6, the swozzle is installed on a fluidized bed 50 of the jet mill through a connecting seat 40, the connecting seat 40 and the fluidized bed 50 are fixed by bolts or screws, the joint is subjected to air tightness treatment, the connecting seat 40 is provided with a tapered hole, the outer contour of the housing 10 is in a conical structure and is attached to the tapered hole, the connecting seat 40 is connected with the air inlet pipe through threads, and the housing 10 is pressed on the tapered hole by using the port of the air inlet pipe.
As one of the installation methods, as shown in fig. 6, the swozzles are arranged at four positions along the circumferential array of the fluidized bed 50, that is, 4 swozzles are arranged at the same horizontal height, and the 4 swozzles are equally divided into the circumference where the 4 swozzles are located, and two opposite swozzles are a pair.
As described above, the present invention can be preferably realized.
The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.
Claims (8)
1. A swozzle for a jet mill, comprising: the shell (10) is in a conical tube shape, and an internal thread (11), a counter bore (12), a conical hole (13), a conical surface (14) and an air outlet hole (15) are sequentially arranged on the shell (10) from the top to the bottom;
a flow directing net (20) for converting high pressure gas into a high speed rotating gas flow;
clamping ring (30), clamping ring (30) are the pipe structure, and its one end is equipped with external screw thread (31), external screw thread (31) with internal thread (11) cooperation, the other end compress tightly in ring (21) terminal surface, clamping ring (30) have the terminal surface of external screw thread (31) one end is equipped with at least a pair of rectangle recess (32).
2. The swirl nozzle for the jet mill according to claim 1, wherein the flow guide net (20) comprises a circular ring (21) and a conical ring (22), the circular ring (21) and the conical ring (22) are coaxially and parallelly arranged, a plurality of flow guide strips (23) are arranged between the circular ring (21) and the conical ring (22), the flow guide strips (23) are of a spiral structure, the outer contour of the conical ring (22) is of a conical structure and is attached to the conical surface (14), the circular ring (21) is arranged in the counter bore (12), and the outer wall of each flow guide strip (23) is attached to the inner surface of the conical hole (13).
3. A swirler for a jet mill according to claim 2, characterised in that the guide strips (23) are evenly distributed along the circumference of the ring (21).
4. A swirler for a jet mill according to claim 2, characterised in that the cross-sectional shape of the guide strips (23) is rectangular.
5. A swirler for a jet mill according to claim 2, characterized in that the inner surface of the conical ring (22) is conical, the inner surface of the conical ring has the same conical bevel as the outer surface of the conical ring, and the flow guiding strips (23) are connected at one end to the inner surface of the conical ring (22).
6. A swirler for a jet mill according to claim 2, characterised in that the flow guiding strips (23) are formed by bending in a mould and then connected to the ring (21) and the conical ring (22) by welding.
7. A swirl nozzle for a jet mill according to claim 2, characterised in that the guide strips (23) are evenly distributed in five strips along the circumference of the circular ring (21) and the conical ring (22).
8. The swirl nozzle for the jet mill according to claim 1, characterized in that the swirl nozzle is mounted on a fluidized bed (50) of the jet mill through a connecting seat (40), the connecting seat (40) is provided with a tapered hole, the outer contour of the housing (10) is in a conical structure and is attached to the tapered hole, the connecting seat (40) is connected with the air inlet pipe through a thread, and the housing (10) is pressed against the tapered hole by using the port of the air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111410576.1A CN114273045A (en) | 2021-11-25 | 2021-11-25 | Swirl nozzle for jet mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111410576.1A CN114273045A (en) | 2021-11-25 | 2021-11-25 | Swirl nozzle for jet mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114273045A true CN114273045A (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111410576.1A Pending CN114273045A (en) | 2021-11-25 | 2021-11-25 | Swirl nozzle for jet mill |
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| Country | Link |
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| CN (1) | CN114273045A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112619837A (en) * | 2020-11-13 | 2021-04-09 | 四川实创微纳科技有限公司 | Jet mill capable of spheroidizing powder particles |
| CN113102074A (en) * | 2021-04-19 | 2021-07-13 | 四川实创微纳科技有限公司 | Superfine powder jet mill with sterilization function |
| CN214077179U (en) * | 2020-11-13 | 2021-08-31 | 四川实创微纳科技有限公司 | Air mixing chamber of jet mill and mounting structure |
| CN214077126U (en) * | 2020-11-13 | 2021-08-31 | 四川实创微纳科技有限公司 | Automatic nozzle adjusting mechanism of fluidized bed type pulverizer |
| CN214554509U (en) * | 2020-11-13 | 2021-11-02 | 四川实创微纳科技有限公司 | Swirl nozzle for jet mill |
| CN214554222U (en) * | 2020-11-13 | 2021-11-02 | 四川实创微纳科技有限公司 | A jet mill for producing bamboo powder |
-
2021
- 2021-11-25 CN CN202111410576.1A patent/CN114273045A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112619837A (en) * | 2020-11-13 | 2021-04-09 | 四川实创微纳科技有限公司 | Jet mill capable of spheroidizing powder particles |
| CN214077179U (en) * | 2020-11-13 | 2021-08-31 | 四川实创微纳科技有限公司 | Air mixing chamber of jet mill and mounting structure |
| CN214077126U (en) * | 2020-11-13 | 2021-08-31 | 四川实创微纳科技有限公司 | Automatic nozzle adjusting mechanism of fluidized bed type pulverizer |
| CN214554509U (en) * | 2020-11-13 | 2021-11-02 | 四川实创微纳科技有限公司 | Swirl nozzle for jet mill |
| CN214554222U (en) * | 2020-11-13 | 2021-11-02 | 四川实创微纳科技有限公司 | A jet mill for producing bamboo powder |
| CN113102074A (en) * | 2021-04-19 | 2021-07-13 | 四川实创微纳科技有限公司 | Superfine powder jet mill with sterilization function |
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Application publication date: 20220405 |
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