JPS5874157A - Continuous system classifying device - Google Patents

Abstract

PURPOSE:To classify fine particles of 0.1mum order with high accuracy and high efficiency, by preparing a liquid to be classified, which has mixed fine particles into a liquid, and making this liquid pass through a centrifugal force field continuously as a stable flow. CONSTITUTION:A liquid to be classified is supplied to an inflow pipe 9 by operating a rotary device 8 and rotating an enclosed vessel 1 and an intermediate body 5 as one body. The liquid to be classified flows into an upper narrow space 6 in the vessel 1 from an inflow port 2, contacts each surface of the enclosed vessel 1 and the intermediate body 5, and is controlled to a laminar flow stable flow by viscous resistance. At the same time, by centrifugal force, it expands like a plane seen eddy, is supplied to a separated space, and mixed particles are jumped to the outside in accordance with size of its particle diameter by centrifugal force. Subsequently, only fine particles corresponding to a specified particle diameter or below flow into a lower narrow space 6, reach an outflow port 3, and large-diameter particles which are left in the separated space 15 are taken out after the classification has ended.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a continuous particle classification device that combines centrifugal separation and hydrodynamic separation.

Techniques related to the classification of fine particles have recently been of interest in the field, and are particularly recent. In the case of various ultra-precision processing IF using Pumiqun-order mold particles, the presence of coarse grains directly affects the quality, so it is necessary to establish these fine particle sizing techniques. The present applicant has also previously disclosed an effective classification method in Japanese Patent Application Laid-Open No. 1687-1987.

The present invention further develops and improves the above e4o with O69.
0.1 (#l) For O〆 and i-5 large particles, 70 Separation accuracy for rounding physical properties etc. The liquid to be classified mixed into the liquid is continuously passed through a centrifugal force field in a stable flow to produce high accuracy and high precision particles of the order of 1 (μ). There is also O'e that made efficient classification possible.

In the present invention, if an inlet and an outlet are provided that allow continuous inflow and outflow of the liquid to be classified, IC@
A closed container having an outer peripheral wall having a truncated conical shape has an outlet for taking out a liquid O containing separated particles, which are particles, on the side of the main body;

On the other hand, with the intermediate body forming the narrow gap and the separation space that produces a stable and good flow of laminar flow in the closed container, and the intermediate body described above inside, the closed container is integrated with the intermediate body. The continuous classification apparatus is a rotating device that applies centrifugal force to the liquid to be classified in the sealed container.

The details of the present invention will be described below with reference to the drawings and 9-embodiments. In the drawing, 1 is a cylindrical hermetic seal**, and the inlet 2 allows continuous inflow and outflow of the liquid O to be classified. and an outlet 3, and an outlet 4 for a liquid containing separated particles, which are coarse particles, is provided in the main body. 5 is a disc-shaped intermediate T
o) Fixed in the closed container 1 with a connecting member such as a bottle (not shown) so as to rotate integrally with the closed container 1.

Moreover, there is a gap 1ii6.6 between the top and bottom of the airtight container 1.
are also arranged so as to form a separation space, which will be described later, with respect to the side inner surface. The sealed container 1, intermediate body 5 and O rotation are as follows:
A motorized zero-rotation device 8 is connected to the sealing spring 111 or the intermediate body 5 via a pulley wheel 7 or the like.

In the present invention as an embodiment, an inflow pipe 9 and an outflow pipe 10 are connected to the upper and lower center of the closed container 10, and the outlet 4 is connected to the lower surface of the closed container 1. A take-out passage 11 is provided, fitted over the outflow pipe 10, and connected to the discharge pipe 12, and the discharge pipe 12 and the inflow pipe 9 are mounted on a bearing 13, so that even 1M can rotate for 13 turns. )l, while the intermediate body 5 has its central IIk axis of rotation 1
4 is provided as necessary, inserted into the inflow pipe 9 and the outflow pipe 10, supported by a single bearing (not shown), and provided between the upper and lower inner surfaces of the book closing a1e and the inner surface of the side. A separation space 15 is formed between the two, and an interspace is formed as necessary. 16.60 end (
4m)-(6m) are rounded so that the liquid to be classified flows smoothly along the intermediate body 50111m and folded into so@.
Let me.

In the above embodiments, the closed container 111 is rotated horizontally, but it may also be rotated vertically, and the inlet 2 and outlet 30 positions may be adjusted as appropriate. It can be changed.

Also, the connection and fixation of the closed container 1 and the intermediate body 5 may be done at any location and in any manner as long as it does not increase the turbulent flow of the liquid to be classified or the resistance. Vertical rotation axis 1
4 and 14 are not necessary, and the shape of the "closing" device 10 can be changed to, for example, a substantially conical trapezoid as shown in FIG. It will be clear from the following explanation of the operation that the rotating device 8 and the like for rotating the customer device 1 or the intermediate body 5 do not require any special limitations.

In the present invention, when a liquid to be classified is to be treated with a To-5 machine containing fine particles of size O, first the rotating device 8 is operated to turn the closed chamber 1 and the intermediate body 5. The liquid to be classified flows from the inlet 2 into the upper gap 116 in the sealed container 1, and the liquid to be classified flows into the gap 116 in the closed container 1. The liquid contacts the sealed container 1111 and the intermediate body 5a4)1i, and the flow is regulated to a stable laminar flow due to viscous resistance, and spreads into a spiral shape in plan view due to centrifugal force, and then flows into the separation space 15. In the separation space 15, O mixed particles in the liquid to be classified are blown outward according to the particle size O by centrifugal force, and O particles with a certain particle size or less are mixed with the liquid to be classified. The liquid to be classified flows into the lower narrowing amount H6, is continuously fed to the inflow pipe 9, and due to the pressure of the liquid to be classified O flows into the lower narrowing amount WfL6.
A counter-outflow pipe 10 is also taken out to an outflow port 6 located at the center of the customer device 1. On the other hand, fl! with a certain particle size or more! The incoming coarse particles are left in the separated space 15 and accumulated, and when the predetermined classification is completed, a closing valve (not shown) provided in the outflow pipe 10 etc. is opened to remove O from the separated space 15. Takeout port 4. The separated particles, which are coarse particles, are removed to the discharge pipe 12 through the take-out passage 11,
Alternatively, the extractor ca4 may be opened to allow the separated particles to be continuously removed together with the liquid.

ζO, the liquid to be classified according to the present invention is made into a laminar flow through the upper narrow gap 6 and flows into the separation space 15 in a spiral shape, so that the flow is extremely smooth and rectified, and large and small particles are not mixed in. Fine particles are also in a smooth flow state suitable for being classified, making it possible to perform multi-precision 0jIIvh classification. In other words, the liquid to be classified that has flowed into the laminar flow ott separation space 15 flows into the lower narrow gap 6 while maintaining a stable laminar flow and good flow, since the sealed container 811 and the intermediate body 5 rotate together. During this time, the larger the particles (vkO), the larger the mixed particles, the larger they are, the more they are immediately blown outward after flowing into the separation space 15, and only fine particles with a certain diameter or less pass through the separation space 15. This is O, which flows into the lower narrow volume I[6 and is classified.

Next, the results of nine classifications conducted using the experimental apparatus according to the present invention will be explained. The experiments were conducted under the apparatus conditions shown in Table 10, and the liquid to be classified had a density of &66F/jOZrO! The LO image powder was mixed with water at the weight percent of the concentrated coal powder, and the throughput was set at 488 cc per minute. Before classification, the O powder distribution in the Hiro-classified liquid was as shown in Figure 6. In such a case, 6 and 9 are distributed as shown in Fig. 7.8 O after classification.

Table 1 - Figures 6 to 8 show the number of particles contained in the liquid to be classified on the vertical axis and the diameter of the particles on the horizontal axis. As shown in Figure 6, it contains many fine particles with a diameter of 0.1 to 0.2 (pm), and larger particles with a diameter of 1. Although the distribution state was such that it remained contained even though it gradually decreased up to S (4 m), after classification, when the device rotation speed M was 11000 RP, as shown in Fig. 7, almost all of the liquid was contained in the liquid to be separated. 0.6 (μ sea bream) or less: Classified so that only the roe remains, and the device rotation speed is 1ll10
At 1RPO, approximately 0.4 (μm) a as shown in Figure 8.
It was found that only the lower fine particles remained, and the larger particles were removed from the liquid to be classified.

In addition, Fig. 4.6 shows whether each fine particle having a different direct fko is classified by taking a flow trajectory in the separation space 15 at $P- in the above-mentioned apparatus, that is, by hydrodynamic calculation, that is, the flow and It is calculated by solving the dynamic equation of particles Oa existing in the flow O, and it is expressed as 9, and the number of rotations of the device is
In Figure 6 with 106ORP, ul[11: D $ (
L7 (pm) or more O is also 150 (IRPM)
Figure 5 shows that even if the diameter is 0.6 (μm) or more, O can be separated from the liquid to be classified.

As described above, the present invention involves rounding to perform precision classification of fine particles, mixing fine particles to be classified into a liquid to create liquid separation 9, and transferring the liquid between the supply container 411 and the intermediate body 5. The liquid to be classified is made to pass through a narrow gap 6 formed in the liquid to form a well-organized laminar flow, and the entire closed chamber 161 is rotated to apply centrifugal force to the liquid to be classified, thereby classifying fine particles. So 60. This has made it possible to obtain products with higher precision and better quality in various ultra-precision machining processes that utilize extremely small particles.

(The whole device is compact because the intermediate body 5 is installed inside and the entire closed container 1 is rotated.) Not only is the classification work easy, but it also requires one machine to classify various mixed particles of 1 particle size. If this cannot be achieved with a wood classifier, it is convenient to connect multiple stages in series, as this allows continuous multi-stage classification.

FIG. 6 is a flow diagram of the particles in the separation chamber, FIG. 6 is a distribution graph of the particles in the liquid to be classified before classification, and FIG. 7.8 is a graph of the distribution of the particles after classification.

1: Airtight container, 2: Inlet, 3: Outlet, 4: Outlet,
5: Intermediate, 6: Narrow gap, 15: Separated space Patent applicant
Wimbu Kaisha Yosha Daikanjin Patent Attorney Takashi Yano Ikaka Oboro Figure 2 Figure 3 Figure 1 Figure 5 Figure 4

Claims (1)

[Claims] (1) Continuously classified I! Inflow and outflow possible. A black procreation device which is provided with an opening and an outflow port, and an outlet for the liquid that eats the separated particles that come with the particles, on the side of the main body. The inflow liquid produces a stable laminar flow within the container, and the space on the outlet side widens at the bottom. The intermediate body forming a separated space in the form of a shape and the intermediate body are folded inwardly, and the sho-shose-sai song is integrally ra@ with the intermediate body in a round shape, and the liquid to be classified in the said black-seal vessel is ra@ Continuous classification equipment called field@device that applies centrifugal force.