JPS5814822B2 - Stator structure of vortex type pulverizer - Google Patents

Description

[Detailed Description of the Invention] <Explanation of the Claims> The present invention provides an apparatus for finely pulverizing granular raw materials such as pigments, in which a cylindrical stator is attached to the inner surface of a vertical cylindrical casing, and the stator is equipped with a vertical shaft. This invention relates to the stake structure in which rotors are arranged in multiple stages in a radial direction on a rotating shaft,
In particular, a porous cylindrical stator made of wire mesh or the like that participates in fine pulverization together with a porous cylindrical rotor made of wire mesh or the like is provided with buttful fins extending inward to extend the circulation action over time and perform the fine pulverization process. This invention relates to a stake structure of a whirlpool type pulverizer that increases the number of pulverizers.

<Prior Art> As is well known, there are many industrial fields that require fine particles such as carbon for copying and pigments, and mechanical crushing is the most efficient way to obtain such fine powder products from granular raw materials. , as seen in Japanese Patent Publication No. 38-16428, a porous cylinder made of wire mesh or the like is provided inside a vertical casing cylinder, and a rotating shaft mounted inside the casing is rotated at high speed, and the rotating shaft is integrally There is one in which a granular raw material is finely pulverized using a multistage radially porous cylinder provided laterally and the porous cylinder.

Problems with conventional methods> The seed pulverizer is extremely rational in principle and should have basically good pulverization efficiency, but the mechanism involved in pulverization is Since the mechanical structure is considered as the primary consideration, the structure has the disadvantage of being extremely complex, and has the disadvantages of being large and heavy, resulting in high cost, occupying a large space, and generating vibration noise. There is, and also,
The problem was that the work operations were extremely cumbersome.

Furthermore, as described above, the structure is complicated, which makes maintenance difficult, and the airflow within the device is subject to severe disturbance, which actually impedes pulverization, making it difficult to operate as designed.

<Objective> The object of the present invention is to solve the problems of the porous cylindrical stator and porous cylindrical rotor type pulverizers based on the above-mentioned prior art as a technical problem to be solved, and to circulate the vortex within the stator. By effectively participating in pulverization in the process and primarily considering the flow of the material to be processed, it is possible to fully demonstrate the pulverization function despite its compact size. The purpose of this invention is to provide an excellent vortex-type pulverizer that will benefit the field.

In accordance with the above-mentioned object and based on the scope of the above-mentioned patent claims, the structure of the present invention is such that the air-transported granular raw material, which is sucked under negative pressure from the center by the centrifugal swirling vortex generated by the rotation of the rotor during operation, is placed inside the porous cylinder of the casing. The powder is pulverized by the cooperation of the porous cylinder and the multi-stage porous cylinder extending laterally from the rotor on the vortex, and is discharged from the outlet provided on the outside of the top lid. In the process of reaching the outlet, unpulverized or insufficiently pulverized particles are centrifugally classified toward the porous cylinder due to their large specific gravity and large diameter, and fall along the porous cylinder. The descent is stagnated, and those with large diameters descend smoothly from the circumferential slit, while those with medium and small diameters circulate and rise from the inside, are applied to powder sand, and the descent process is extended to become fine through circulation. It uses technical means that contribute to the crushing.

<Example> Next, an example of the present invention will be described below based on the drawings.

In the embodiment shown in FIG. 1, 1 is a pulverizer of the present invention, and a stainless steel vertical cylindrical casing 4 is connected to a base 2 via a frame 3, and a discharge port 6 is provided near the outside of an upper lid 5. , Also, in the lower lid 7, there are four suction ports 8, 8 near the center.
. . ., an inverted truncated cone 9 is attached from the outside of the suction ports 8, 8 . A porous crimp cylinder 10 made of
The fins 1' are fixed to the porous cylinder 10, with the upper fin 11 having a smaller width and the lower fin 11' having a wider fin width.

The rotating shaft 14 rotatably supported by the bearings 12 and 13 of the upper and lower lids 5 and 7 is provided with arms 15 in the radial direction in multiple stages in the axial direction so as not to cause imbalance in the rotational moment. , 15 . . . , a porous cylindrical body 17 made of wire mesh and having a predetermined mesh is provided as a rotor 16 with its axis horizontal.

Incidentally, the total cross-sectional area of the discharge port 6 is the suction L18, 8...
・It is designed to be larger than the total cross-sectional area of .

Further, a pulley 18 is fixedly installed at the lower end of the rotating shaft 14,
Bells 1 to 22 are stretched between a frame 19 fixed to a base 2 and a pulley 21 of a town-speed change motor 20.

On the other hand, 23 is a hopper for raw material of pigment granules, and a vibrating feeder 24 attached to the lower end thereof faces air opening shoes 1 and 25, and the shoes 1 to 25 are connected to transport pipes 26 and 2.
6... are connected to the suction rl3, 8...

Note that 27 is a bag filter, which is connected to the writing outlet 6 via a pipe 28.

<Operation> In the above configuration, the motor 20 and the vibration feeder 2
4, the rotor 16 rotates at high speed via the rotating shaft 14, and due to the centrifugal rotation, negative pressure is generated in the suction ports 8, 8, . A suction force is generated, and the pigment raw material is fed from the hopper 23, and is sucked through the suction ports 8, 8, . . . by air transport, and rides on the swirling vortex.

Therefore, as mentioned above, the swirling vortex flow has the suction port 8 closer to the center,
Since the discharge port 6 is provided on the outside, the rotor 16
This creates an upwardly expanding swirling flow, which is finely pulverized by the shearing action of the porous cylinder 17, the porous cylinder 10 mesh, and the uneven parts. The flow rate increases, and raw materials with high specific gravity are also sucked in and subjected to fine pulverization.

The crushed raw materials are discharged and stored in the bag filter 27 from the discharge port 6 to be manufactured into products, but in the process of transferring to the discharge port 6, unpulverized and insufficiently crushed particles with large specific gravity and large diameter are removed from the discharge port 6. The speed decreases due to the enlarged area of 6, and the large specific gravity in the previous process is centrifugally shifted toward the crimp cylinder 10, which causes it to shift toward the porous cylinder 10, and due to gravity, it moves along the porous cylinder 10. However, its rapid descent is inhibited by the baffle fins 11 and 11', and it descends by overcoming it. Therefore, the descent process becomes long, and at the bottom it slides into the suction port 8 with the inverted truncated cone 9. It rises again along with the suction flow and is subjected to the above-mentioned pulverization.

By repeating such a circulation cycle, the raw material is reliably pulverized and discharged from the discharge port.

Therefore, in this embodiment, the double fins 11,1
The base body 1' is a ring plate whose width is gradually enlarged downward, and as shown in FIG.
11' has a plurality of slits 29 , 29 .
. . . . . . . . . . . . . . . . . . . . . . . . . ) . Continue repeating the circulation to ensure fine pulverization.

In the embodiment shown in FIGS. 3 and 4, the double fins 11'' are separated and independent from each other by interposing slits 29', 29' in the radial direction, and each independent double fin 1
1"', 11"'... are inclined downward in the same direction as the rotation of the rotating shaft 14, and therefore, the swirling air flow is directed to each independent double fin 11"', 11"'... from below. It is supposed to blow up directly towards you.

Therefore, in this embodiment, normal fine powder sand is finely pulverized and discharged through the same process as described above, and unpulverized materials with large specific gravity and large diameter begin to settle on the peripheral side in front of the discharge port 6 and become porous. Almost unaffected by the airflow rising and swirling along the cylinder 10, it descends from the slits 29', 29'...
In the descending process or in the circulation process around the cone 9, it is repeatedly re-pulverized as described above.

Therefore, in this embodiment as well, the material to be ground falling from before the discharge port 6 for re-pulverization is prevented from having a short path, the pulverization process is lengthened, and the material is pulverized more reliably.

Further, the embodiment shown in FIG. 5 has mutually independent obliquely installed butt-full fins 11 of the embodiment shown in FIG.
``'', 11'''... are attached with the buttful fins 11'' of the embodiment shown in FIG. are substantially the same.

Of course, the embodiments of the invention of this application are not limited to the above-mentioned embodiments, and other embodiments are also possible.

Of course, the raw materials to be treated are not limited to pigments and carbon for copying.

Effects> As described above, the present invention has a porous cylindrical vertical stator and a porous cylindrical rotor attached in the radial direction to a rotating shaft coaxially mounted on the stator. By providing a discharge port and a suction port, basically, the swirling airflow is rotated by applying centrifugal force from the central suction port to the outer discharge port, and is not only efficiently pulverized but also Inadequately pulverized material with large specific gravity and large diameter is circulated downward at the target position, and when descending along the circumferential porous cylinder, the short pass is prevented by the thick fins, and early circulation is prevented, so that the circulation process is accelerated. The longer the length, the more effectively the pulverizing action in the recirculation process is carried out, and the effect is that uniform pulverized particles can be obtained.

In addition, by providing a slit in the bulk fin,
There is also the effect that the particle size, direction of descent, etc. of the descending raw material can be adjusted by the slits to provide optimum pulverization and recirculation.

It is also possible to design the slits provided in the fins so that they can descend without being obstructed by the rising swirling airflow, and in this way, the slits provided in the casing can be designed to effectively control the flow of the material to be processed. By determining the positions of the suction port and the discharge port, there is an effect that the porous cylinder and the porous cylindrical body perform the pulverizing action of the stator and rotor as designed.

Furthermore, as mentioned above, by designing with the flow of the material being treated as the primary consideration, the structure of the rotor and stator is simplified, the entire machine becomes compact and small, and the manufacturing cost is not only low, but also It also has the advantages of easy maintenance and low vibration and noise.

[Brief explanation of drawings]

The drawings show an embodiment of the invention, and FIG.
2 is a plan view for explaining the entire fin of the embodiment; FIG. 3 is a longitudinal sectional view for explaining another embodiment;
FIG. 4 is a sectional view taken along the line IV-TV in FIG. 3, and FIG. 5 is a longitudinal sectional view for explaining another embodiment. 17... Porous cylinder body, 14... Rotating shaft, 5... Upper lid, 7... Lower lid, 4... Casing, 1... Fine grinder, 10... Porous cylinder (stator), 11, 11
" , 11"'...Bathful fin, 8...Suction port, 6...Exhaust port, 29, 29'...Slit.

Claims (1)

[Claims] 1. In a porous cylindrical stator structure of a whirlpool-type sand mill, in which a rotary shaft in which radially extending porous cylinders are attached in multiple stages in the vertical direction is attached to the inner surface of a casing in which the rotating shaft is mounted on the upper and lower covers. A vertical porous cylindrical inner surface of the stator is provided with round fins, the round fins have slits at predetermined intervals in the circumferential direction, and a suction port is provided on the inner side of the lower cover.
A stator structure for a whirlpool type pulverizer, characterized in that a discharge port is provided on the outside of the master lid.