JPS601828Y2 - Classifier - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the invention of a classification device, and aims to provide a mechanism that is easy to operate and can obtain a favorable classification effect.

Various types of classification devices have been proposed for classifying powder by particle size, but these conventional devices have separate drives for distributing and supplying powder to the upward swirling airflow in the housing and for classification processing. It requires a lot of force, has a complicated operating mechanism, has a complex device configuration, and has disadvantages such as increased running costs.

The present invention was devised through research to eliminate the disadvantages of the conventional ones as described above.
One embodiment of the present invention is shown in FIGS. 4 to 4, in which a support member 11 horizontally suspended at the bottom of a tower-shaped housing 10 has a main ejection part 12 and a third ejection part as shown in FIG.
A spouting mechanism 1 integrally fitted with an auxiliary jetting part 13 as shown in the figure is attached, and the bottom of the housing 10 is closed with a bottom face 10a which is slanted as shown in FIG. A coarse particle discharge port 24 is provided on one side of the bottom surface 10a, and a main blowing pipe 6 for the classified gas is installed vertically in the center of the bottom surface 10a, and the blowing pipe 6 passes through the auxiliary blowing part 13. It is opened at the center of the main ejection part 12 described above.

As shown in FIG. 2, between the intermediate plate 14 and the top plate 15, which form the boundary with the auxiliary jet part 13, this main ejection part 12 has a guide piece 16 which is sufficiently inclined with respect to the radial direction of the intermediate plate 14.
is provided, and the fluid such as air blown into it by the above-mentioned blowing pipe 6 is blown out from the gap between the guide pieces 16 as shown by the arrow a in FIG. The blowing airflow collides with the inner surface of the housing 10 and is swirled to form a swirling upward flow within the housing 10. In the case shown, the top plate 15 is larger than the intermediate plate 14. The guide piece 16 has a small diameter and is not only inclined in the radial direction as described above, but also has a small diameter in the housing 1 as shown in FIG. 1 or 4.
The guide pieces 16 are also provided symmetrically and inclined in the axial direction of the guide piece 16, so that the above-mentioned swirling upward flow can be easily formed due to the arrangement of the guide pieces 16.

A supply pipe 3 for the powder to be classified is opened on the top plate 15 .

As shown in the figure, the auxiliary jetting part 13 formed below the intermediate plate 14 has a larger diameter than the main jetting part 12 described above, and a blowing chamber 17 is formed at the bottom thereof. The air inlet 4 is provided in the cutting line direction, and a guide piece 19 is provided on the circumferential side between the intermediate plate 14 and the bottom plate 18 attached parallel to the lower part of the intermediate plate 14. Regarding this guide piece 19, They may be arranged along the radial direction as shown in FIG.

That is, the guide piece 16 may be inclined in the same way as the guide piece 16 shown in FIG. 2, but under the conditions where the swirling upward flow as described above is properly formed, it may not be as shown in FIG. 3. Furthermore, the guide pieces 16 and 19 may be appropriately curved in order to regulate the ejection direction, as shown in part by the imaginary lines.

In the upper part of the housing 10, an annular plate 7 whose inner surface is inclined is provided in a step, and below each of these annular plates 7, a rotating classification piece 9 is provided in a step. The rotating classification piece 9 is attached to the circumferential side, and the rotating classification piece 9 may be fixed in the radial direction,
Furthermore, even if each rotating classification piece 9 is pivotally mounted on the radial extension of the disk 8 so as to be able to tilt as appropriate, the rotation of the disk 8 automatically rotates it in a substantially radial direction position. .

A fine particle discharge port 21 is provided at the top of the housing 10, and is connected to a back filter or the like through a suitable duct to collect the discharged fine particles.

5 and 6 show another embodiment according to the invention, namely a main spout 1 mounted on an auxiliary spout 13.
2 is of a lower profile than that of FIGS. 1-4, and its guide piece 16 is therefore only inclined in the radial direction.

Further, the fine particle discharge port 9a is bent laterally directly above the housing 10, and a drive mechanism 22 such as a gear box (or motor) is attached to the upper part of the discharge port 9a using the disks 8, 8. I am admonished to aim for the rotation of

To explain the operation method of the device according to the present invention as described above, the fluid blown into the blowing pipe 6 under suitable high pressure conditions is guided by the guide piece 16 of the main jetting part 12, and swirls along the inner surface of the housing 10. Forming an upward flow is as described above, and the housing 10
When the powder to be processed is supplied from the supply pipe 3 into the housing 10, it is dispersed and floated by the swirling upward air current, and the fine particles rise and are about to be discharged from the discharge port 9. The rotating classification piece 9 provided at the top of the annular plate 7a receives the classification effect, that is, the coarse particles mixed in with the large mass fine particles are preferentially pressed against the housing wall surface. Only the fine particles, which are less likely to be affected by this action, remain on the swirling upward flow as described above and are discharged. Exit 9
It will be sent out in the direction.

Generally, the coarse particles are preferentially bonded to the inner wall of the housing 10 due to the above-mentioned swirling upward flow, which overcomes the upward force of the swirling flow and moves downwards into the housing 10. As shown in FIG. The fine particles that are mixed into the coarse flow and fall are lifted up again by the ejected fluid, separated from the coarse particles as shown in FIG. 4, and placed on the updraft ejected from the main ejection part 12 as described above.

In this way, only the sufficiently coarse particles can be used as the housing 10.
is taken out from the outlet 14 along the inner surface of the tube.

According to the present invention as described above, the particles that have been subjected to the classification effect by the swirling upward airflow that is supplied from the main jetting part and formed inside the housing 10 are the swirling classified pieces 9 and the inclined annular plate 7 at the top of the housing 10. The material to be classified is It is clear that preferable classification results can be obtained because these actions are repeated, but even though such a complex classification action is performed, the rotating classification piece 9 is the only driving mechanism. Therefore, the operation and operation are simple and the mechanism is simple, so there are fewer causes of failure, and this simple mechanism and operation method produces excellent classification results, making it an industrial choice. This is a highly effective idea.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway slope view showing the general structural relationship of the device according to the invention, Fig. 2 is a cross-sectional plan view of the main ejection part thereof, Third
The figure is a cross-sectional plan view of the auxiliary ejection part, FIG. 4 is an explanatory diagram of the classification action on the inner wall surface of the housing, and FIG. 5 is a partial cutaway similar to FIG. 1 showing another embodiment of the present invention. The slope view, FIG. 6, is a partial explanatory diagram of the classification action. In these drawings, 1 is a jetting mechanism, 3 is a supply pipe, 4 and 6 are blowing ports, 7 is an inclined annular guide piece, 8 is a disc, 9 is a rotating classifier piece, 10 is a housing, and 12 is a main jetting part. 13 is an auxiliary ejection part, 14 is an intermediate plate, 15 is a top plate,
16 is an inclined guide piece, 17 is a blowing chamber, 18 is a bottom plate, 19
indicates a guide piece.

Claims (1)

[Scope of utility model registration request] A rotating plate with rotating classification pieces is provided at the top of the tower-shaped housing, and the powder to be classified is supplied below the rotating plate, and a swirling upward flow is generated inside the housing to perform the classification. In the above-mentioned housing, there is provided a main ejection part with an inclined guide piece arranged at the lower part of the housing, and an auxiliary ejection part with a diameter larger than that of the main ejection part is provided below the main ejection part, and these ejections are A classification device characterized in that the swirling upward flow is formed by the fluid ejected from the section through the guide piece, and a classifying action is applied to the coarse particles flowing down along the inner surface of the housing.