JP2001096232A - Vibration sieving device and vibration sieving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration sieving device which is capable of classifying powder and grains and removing the clogged powder and grains by imparting two different kinds of amplitude to a vibration sieve. SOLUTION: This vibration sieving device may be achieved by providing the vibration sieving device for classifying the powder and the grains with an excitation device having a function to impart at least two kinds of the amplitude varying from each other; the small amplitude for classifying the powder and the grains and the large amplitude capable of removing the clogged powder and grains to the sieving device. Further, the excitation device has a function capable of varying the amplitude. This vibration sieving method consists in imparting at least two kinds of the amplitude varying from each other; the small amplitude for classifying the powder and the grains and the large amplitude capable of removing the clogged powder and grains to the sieving device in the vibration sieving method for classifying the powder and the grains.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating sieve apparatus and a vibrating sieve method capable of classifying powders and grains and removing clogged powders and grains in fields such as mining, chemistry, food and medicine.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open No. 57-17779 discloses an apparatus for removing clogging of a vibrating sieve mesh. A plurality of striking plates (for example, rubber balls, etc.) are provided on the vibrating sieve in the device for removing clogging of the sieve mesh, and the striking plate strikes the sieve mesh by vibrating the vibrating sieve to move on the sieve mesh of the vibrating sieve. Proceeding in a predetermined direction, powder and particles are removed from the clogged vibrating sieve mesh. When the striking plate arrives at the sieve final position with the vibration of the sieve, the removing device winds up the rope connected to the striking plate to the sieve initial position by the winding device, and then the striking plate is again struck by the vibration according to the vibration of the sieve. The process is repeated to continue the operation of removing the clogged powder and grains.

[0003] Japanese Patent Application Laid-Open No. 9-234425 discloses that
Disclosed is an apparatus for preventing clogging of a sieve net of a vibrating sieve provided with a plurality of elastic members on a wire rope provided with slack from one end to the other end in a vibrating vibrating sieve. This device for preventing clogging of a sieve mesh is disclosed in Japanese Utility Model Laid-Open No. 57-17779.
Similar to the device of the publication, the elastic body attached to the wire rope hits the sieve net to remove powder and particles from the clogged sieve.

Further, in a vibration sieving apparatus disclosed in Japanese Patent Application Laid-Open No. 52-69059, a plurality of a pair of vibrators having different frequencies are dispersed and arranged on each horizontal frame of the vibration sieving body. .
With such a configuration, different frequencies added by the shaker generate an interference wave, and the frequency (interference wave) is displayed on the sieve.
And classify the powder and grains, as well as the powder on the sieve surface,
Prevents grain clogging.

[0005]

Problems to be Solved by the Invention
No. 5 and Japanese Utility Model Application Laid-Open No. 57-17779 each have a vibrating sieve provided with a striking plate or an elastic body on the vibrating sieve. In the clogging removing device, the vibration or striking of the striking plate is attenuated as the distance from the striking plate increases. Powder from the sieve mesh,
The action of removing the particles is reduced, making it difficult to uniformly remove the clogging over the entire vibrating sieve. Further, in this clogging removing device, the striking plate or the elastic body collides with the powder, the granules and the sieve mesh, so that not only the mesh of the sieve is damaged but also the striking plate itself and the rope are worn.

[0006] Also, Japanese Patent Application Laid-Open No. 52-69059 discloses
A device that generates interference waves with different frequencies added by a pair of shakers can remove the clogging, but will result in a reduction in sieving efficiency. Accordingly, an object of the present invention is to provide a vibrating sieve device and a vibrating sieve method capable of removing clogged powder and particles when classifying the powder and particles with the vibrating sieve device.

[0007]

The above objects of the present invention can be solved by the vibrating sieve apparatus and vibrating sieve method of the present invention described below. The vibrating sieve device of the present invention includes powder,
In a vibrating sieve device for classifying particles, a vibration device having a function of adding at least two types of different amplitudes, that is, a small amplitude for classifying powder and particles and a large amplitude for removing clogged powder and particles, is provided. Achieved by:

Further, the vibrating screen device of the present invention is characterized in that the vibrating device has a function of varying the amplitude. The vibrating sieve method of the present invention is a vibrating sieve method for classifying powders and grains, wherein at least two different amplitudes are added: a small amplitude for classifying the powder and grains, and a large amplitude for removing clogged powders and grains. It is characterized by doing.

[0009]

DETAILED DESCRIPTION OF THE INVENTION According to the study of the present inventor, the vibrating sieve improves the sieve efficiency by being classified with a relatively small amplitude for a long period of time. However, the vibrating sieve is liable to be clogged in the sieve mesh. In order to remove clogged powders and grains, it was found that it is better to give an amplitude larger than the amplitude given at the time of classification so that the clogged powders and grains leave the sieve mesh and jump off. .

In view of the above, in the vibrating sieve apparatus and the vibrating sieve method of the present invention, at least two different amplitudes are added to the vibrating sieve, thereby increasing the sieve efficiency and clogging the sieve. Remove powder and grains.
As shown in FIG. 1A, when the powder and the particles are classified by the vibrating sieve, if the amplitude is small, the powder and the particles 22 which are slightly larger than the mesh 21 can fit into the mesh 21 and escape from the mesh. It causes clogging. Therefore, the amplitude is increased to remove clogged powders and grains. However, when the amplitude is applied to the screen of the sieve at an inclined angle and the amplitude is increased, the powder and the granules get out of the screen of the sieve quickly, and as shown in FIG. The powder and grains 22 slightly smaller than 21 pass through the holes of the mesh 21 without falling, and the sieving efficiency decreases.

As shown in FIGS. 2 (a) and 2 (b), in the vibrating sieve device 3 of the present invention, a small amplitude for classifying powder and grains and a large amplitude for removing clogged powder and grains are added. The vibration device 10 having the function of
2 are provided. As shown in FIG.
One or a plurality of 0 and 11 can be provided. When one vibration device 11 is provided as shown in FIG. 2B, it is preferable to have a function of varying the amplitude. The vibration device 11 in FIG. 2B can be provided on the upper portion or the side surface of the vibrating sieve 1, but may be provided at any position as long as the position can provide an amplitude.

[0012]

3A and 3B show a vibrating sieve device 3 for preventing clogging according to the present invention. The vibrating sieve device 3 includes vibrating sieves 1, 2 mounted on respective springs 12 of a base 13.
Was provided. The vibrating sieves 1 and 2 of the vibrating sieve device 3 for preventing clogging according to the present invention include a vibrating device 1 for imparting amplitude to the sieve.
0, (10-1, 10-2), 11, (11-1, 11)
-2) A vibration motor is attached. As the vibration motor, an electromagnetic vibration motor, an eccentric weight vibration motor (weight motor integrated type, weight motor separated type), or the like can be used. In the present invention, the vibrating devices 10 and 11 are vibration motors capable of adding at least two different amplitudes to each of the sieves 1 and 2, and the vibration motors are relatively small to improve the sieve efficiency. Allowing amplitude to be applied to sieves 1 and 2,
Further, it has a function of giving a relatively large amplitude to remove clogged powder and granules from the sieve. This vibration motor provides at least two different amplitudes,
Two vibrating motors may be provided on one sieve, and four vibrating motors may be provided on each sieve as shown in FIG. Further, a motor having a function of giving at least two different amplitudes by one machine may be selected.

The vibrating sieve method of the present invention for classifying powders and granules comprises:
As shown by arrows X and Y in FIG. 3A, the amplitude is given in a direction forming an angle of 45 to 90 ° with respect to the traveling direction of the powder and the particles on the mesh surface of the vibrating sieve. This angle is preferably 49 °
And When the amplitude is given to the vibrating sieve at such an angle, as shown by the dotted line 20, the powder and the grains move from the sieve 4 to the sieve 9 in the fine direction of the mesh of each of the sieves 1 and 2, and are sieved. Is done.

Embodiment 1 FIG. 3 shows an embodiment of the present invention for sieving iron ore raw materials by using seven kinds of automatic sieves for measuring particle size distribution provided with a vibration device capable of adding different amplitudes according to the present invention. This is shown below with reference to (a) and (b). The iron ore raw material was sieved under the conditions shown in Tables 1 and 2 below.
The target powder and grains subjected to the sieving were sintered iron ores. Table 1 shows the sizes and screen areas of the vibrating screens 1 and 2 used. Each vibrating sieve 1 and vibrating sieve 2 are
The No. 2 sieve, the No. 2 sieve and the No. 3 sieve were arranged in the order of the size of the sieve mesh hole and integrated.

Table 1 Size of sieve mesh hole: No. 1 sieve of vibrating sieve 1; 5 mm: No. 2 sieve of vibrating sieve 1; 10 mm: No. 3 sieve of vibrating sieve 1; 15 mm: No. 1 sieve of vibrating sieve 2; 20 mm: No. 2 vibrating sieve 2; 25 mm: No. 3 vibrating sieve 2; 50 mm Area of sieve: No. 1 sieve of vibrating sieve 1; 900 mm × 500 mm: No. 2 sieve of vibrating sieve 1; 700 mm × 500 mm: Vibration No. 3 sieve of sieve 1; 700 mm × 500 mm: No. 1 sieve of vibrating sieve 2; 700 mm × 500 mm: No. 2 sieve of vibrating sieve 2; 700 mm × 500 mm: No. 3 sieve of vibrating sieve 2; 700 mm × 500 mm 1 and the vibrating sieve 2 were vibrated by a vibrating motor. At the time of this vibration, the sinter ore powder and particles classified by the sieve pass through the first sieve 4 to the second sieve 5 and the third sieve 6 of the vibrating sieve 1 and pass through the first sieve 7 of the vibrating sieve 2. It was sent to the 2nd sieve 8 and the 3rd sieve 9, and was classified. In order to sequentially move the sinter to the coarse sieve while vibrating with the vibrating sieves 1 and 2, the vibrating is performed so that the amplitude is given to the sieve mesh surface at an inclination of 49 degrees in the sintering advancing direction. The motor was attached to vibrating sieve 1 and vibrating sieve 2. In this embodiment, the respective sieves of the respective vibrating sieves are arranged side by side. However, the respective sieves may be arranged vertically depending on the purpose of the sieve, or may be a single sieve.

Table 2 shows sieving classification time, sinter supply amount, sieving efficiency (difference in particle size (%) between sieving apparatus and manual sieving), and amplitude. Table 2 Sieving classification time: 2 minutes / time Sinter ore supply amount: 30 Kg / time Sieving device and: -1.2 to + 1.7% (Test standard JIS M8706 Manual screening is an absolute value. Difference of particle size (%) Amplitude 1 (at the time of sieve classification): Sieve 1; 4.5 mm (945 vibrations / min): Sieve 2; 10 mm (710 vibrations / min) Amplitude 2 (at the time of clogging removal): Sieve 1; 7 mm (945 vibrations / minute): Sieve 2; 12 mm (710 vibrations / minute) In the present invention, as shown in Table 2, at the time of sieve classification, the vibrating sieve 1 has an amplitude of 4.5 mm and 945 vibrations / minute. The vibrating sieve 2 is vibrated and the vibrating sieve 2 is vibrated at 710 vibrations / min with an amplitude of 10 mm.
Vibrating at 945 vibrations / min.
Vibration was performed at 710 vibrations / minute in mm. However,
This amplitude number can range from 500 to 2000 vibrations / minute. As described above, the clogging of each of the vibrating sieves could be removed by the automatic sieving operation of increasing the amplitude after classification with the vibrating sieve.

[0017]

According to the conventional vibrating sieve apparatus and vibrating sieve method,
After the sieve classifying operation for about 2 minutes at a time, it was necessary to remove the clogged powder and particles for about 10 minutes. However, the vibrating sieve and the vibrating sieve method of the present invention substantially reduced the size of the vibrating sieve. Since clogging does not occur, clogging removal work is not required, and the efficiency and reliability of the automatic sieving work are improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing clogging of a vibrating sieve mesh (a) and a state where the vibrating sieve does not pass through a sieve mesh (b).

FIG. 2 shows a vibrating sieve device for removing clogged powder and granules according to the present invention, wherein a plurality of vibrating devices are provided in (a).
(B) shows an elevation view when one vibration device is provided.

FIG. 3A is a plan view of a vibrating sieve device provided with a vibrating device for removing clogged powder and particles of the present invention, and FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... vibrating sieve 2 ... vibrating sieve 3 ... vibrating sieve device 4 ... 1st sieve of vibrating sieve 1 5 ... 2nd sieve of vibrating sieve 1 6 ... 3rd sieve of vibrating sieve 1 7 ... 1st sieve of vibrating sieve 2 8 ... 2nd sieve of vibrating sieve 2 9 ... 3rd sieve of vibrating sieve 2 10, 10-1, 10-2 ... vibrating device or vibrating motor 11, 11-1, 11-2 ... vibrating device, or Excitation motor 12 Spring 13 Base 20 Moving direction of powder and granules 21 Sieve mesh 22 Powder and granules X ... Amplitude giving direction Y ... Amplitude giving direction

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Kai 3-1-7 Mabune, Kisarazu-shi, Chiba F-term (reference) 4D021 AA01 AB02 CA05 CA07 CB09 CB15 DA03 DB11 EA02 EA05 EA10

Claims (3)

[Claims] 1. A vibrating sieve device for classifying powder and granules,
A vibrating sieve device provided with a vibrating device having a function of adding at least two different amplitudes of a small amplitude for classifying powders and grains and a large amplitude for removing clogged powders and grains. 2. The vibrating sieve device according to claim 1, wherein the vibrating device has a function of changing an amplitude. 3. A vibrating sieve method for classifying powder and granules,
A vibrating sieve method characterized by adding at least two different amplitudes, a small amplitude for classifying powders and grains and a large amplitude for removing clogged powders and grains.