JPS63166421A - Dispersion machine - Google Patents

Abstract

PURPOSE:To disperse fine powder constituted of submicron particles by enabling pressure gas to be discharged from the inner face of a dispersion cylinder or the like. CONSTITUTION:Pressure gas can be discharged from the inner face of a dispersion cylinder or the like. For example, an outer cylinder 8 and an inner cylinder 9 constituted of a porous material are installed in the dispersion cylinder, and pressure gas is introduced into a space constituted of said cylinders 8 and 9 through a nipple 11, thereby pressure air is discharged out of the inner wall of the inner cylinder 9. As a result, in case fine ceramic powder constituted of submicron particles is dispersed, agglomeration of particles and adhesion of powder to the inner wall of the dispersion cylinder are practically unobserved, and the primary purpose of the dispersion can be achieved. Also, dispersion effect can be improved by installing a plurality of dispersion vanes 6 inside the dispersion cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a powder disperser which generates an air stream containing powder particles in as completely a dispersed state as possible. This airflow is used in various medical experiments and industrial classifiers or particle size dispersion measuring machines.

BACKGROUND OF THE INVENTION FIG. 1 shows a conventional dispersion machine. Powder is fed into the dispersion machine through an inlet l using a feeder or an ejector.

A dispersion vane 6 is provided within the dispersion W2 and is rotated at high speed by a motor 3 via pulleys 4 and 5. FIG.
A strong swirling airflow is generated within the dispersion W2 by the dispersion vanes 6, and the powder fed into the dispersion W2 is deagglomerated and dispersed into individual particles, which are discharged from the discharge lower along with the swirling airflow. Ru. FIG. 3 shows a B-I3 cross section and shows the shape of the discharge port. That is, an airflow containing dispersed powder particles is generated from the discharge lower. This airflow will be used in the various fields mentioned above. Here, it is necessary that the powder particles are more completely dispersed into individual particles, but the finer the particles, the worse the dispersibility becomes.

Problems to be Solved by the Invention However, in conventional dispersing machines, the finer the powder particles, the more incomplete the dispersion becomes, and the aggregated particles, which look like coarse particles, are discharged from the discharge lower. The disadvantage is that it is included in the airflow. One of the reasons for this is that the finer the powder particles, the more they adhere to the inner wall of the dispersion tube 2, and when the amount of adhesion grows to a certain extent, they are smudged from the inner wall of the dispersion tube 2 due to the action of the swirling airflow. It is to discharge the air contained in the airflow from the discharge lower. That is, there was a problem in that powder particles adhered to the inner wall of the dispersion 1i12.

Means to solve problems The present invention will be explained below based on the drawings.

FIG. 4 shows a portion corresponding to the dispersion tube 2 in FIG. 1. An inner cylinder 9 is further provided on the inner surface of the outer W8, and a pressurized gas such as pressurized air is introduced through a nipple 11 into a space 10 formed by the inner cylinder 9 and the outer W8.

Since the inner cylinder 9 is made of a porous material, pressurized air is released from the inner wall of the inner cylinder 9. The discharge port 12 is provided in a tangential direction from the inner cylinder 9, as shown in the C-C arrow view of FIG. 4, and has a structure for discharging the swirling airflow containing powder particles. It becomes. Of course,
The inside of the discharge port 12 can be made of the same material as the inner W9, and the outer tube 8, which is located further outside, can be made of the same material after a certain space.

The purpose of the present invention is to prevent powder from adhering to the inner wall of the inner W9 or, if necessary, the inner wall of the discharge port 12, by releasing this pressurized air.

Of course, instead of making the inner cylinder 9 etc. from porous material,
It is also possible to have a structure in which the pores are arranged in multiple stages to release pressurized air. In any case, there are various ways to release pressurized air.

Function Next, the function will be explained with reference to FIG. FIG. 5 is an embodiment of the present invention. In this case, the inner diameter of the inner cylinder 9 was 7 mm I, and the rotation speed of the dispersing blade 6 was 15,000 rpm. The motor 3 driving this had a power of about 70W. Pressure air of approximately 1 g/cm'' is introduced into the nipple +1,
It was released from the inner cylinder 9 made of sintered metal. The variance result is the first
When compared to the conventional model shown in the figure, a considerable improvement was observed. In particular, when fine ceramic powder composed of submicron particles was dispersed, in the conventional type shown in Figure 1, a considerable amount of agglomerated particles were observed to be discharged, but the fine ceramic powder also stuck inside the dispersion cylinder, and eventually The dispersion effect had finally ceased. However, in the case of FIG. 5, which is an example of the present invention, such aggregation and adhesion were hardly observed, and the dispersion results also achieved the initial objective.

Embodiment FIG. 5 is a diagram showing an embodiment of the present invention. Inner diameter 70
The inner cylinder 9 of the si+ is made of sintered stainless steel metal, is porous, and has a structure in which pressurized air introduced from the nipple 10 is released into the interior of the dispersion cylinder. The outer cylinder 8 was made of stainless steel, and pressurized air of about I kg/cWr was introduced into the space 10 through a nipple 11. The powder was fed at 5 kg/h from the input port 1 by a special @quantity feeder. The dispersion blade 6 is connected to the motor 3
was rotated at a rotational speed of 15,000 rpm via pulleys 4 and 5. The discharge port 12 had a structure similar to that of the method shown in FIG. 1, and the results of zero dispersion showed a significant improvement as shown in the section of the effect. In this case, it is also possible to have a structure in which pressurized air is also released from the bottom 13 within the dispersion cylinder as required. Further, as shown in FIG. 6, it is also possible to provide a plurality of dispersion vanes 6 to improve the dispersion effect.

Effects of the Invention The present invention has made it possible to disperse fine powder composed of submicron particles.

As a result: 1. In animal experiments, experiments involving aerosols containing submicron dust become more accurate.

2. In a submicron particle classifier, completely dispersed particle groups are supplied to the classifier, so the classification effect is significantly improved.

It can be said that the benefits to various industrial fields are extremely large.

[Brief explanation of the drawing]

1 to 3 are explanatory diagrams of a conventional type, FIG. 4 is a detailed explanation of the present invention, and FIGS. 5 and 6 are one embodiment of the present invention. In the figure, 1: Inlet 2: Dispersion cylinder 3: Motor 4: Pulley 5: Pulley 6: Dispersion vane 7: Discharge port 8: Outer cylinder 9: Inner cylinder lO: Space ■: Nipple 12: Discharge port 13: Bottom Part O 1 Figure 2 Figure 3 Ay 4 Figure f'5 Written amendment to oral proceedings (voluntary) 1. Indication of the case Patent Application No. 271232 filed in 1986 2, Title of the invention Dispersing machine 3, Person making the amendment Relationship to the case Patent applicant 4, Subject of the amendment Claims 1 to 5. 5. Contents of the amendment The scope of claims in the specification will be amended as shown in the attached sheet. Description 1, Title of the Invention Dispersing Machine 2, Claims (1) In a dispersing machine composed of a dispersing cylinder provided with an input port and a discharge port, and a dispersing blade, the inner surface of the dispersing cylinder, the inner surface of the discharge port, and the bottom part The inner bird "L" L is dead. f''/' 1 A disperser characterized by a structure that releases pressurized gas from the small particles 1. (2) A disperser according to claim 1, characterized by being provided with a plurality of dispersing blades.

Claims (5)

[Claims] (1) In a disperser consisting of a dispersion cylinder with an input port and a discharge port, and a dispersion blade, pressure is applied from the inner surface of the dispersion cylinder, or the inner surface including the inner surface of the discharge port, or the inner surface including the bottom. A dispersion machine featuring a structure that releases gas. (2) The disperser according to claim 1, characterized in that a plurality of dispersing blades are provided. (3) Claim 1 or 2, characterized in that a dispersion cylinder is provided with a structure that introduces pressurized gas into a space constituted by an inner cylinder and an outer cylinder, and releases the pressurized gas from the inner cylinder. Dispersing machine according to item 2. (4) a discharge port configured to introduce pressurized gas into a space made up of an inner wall and an outer wall and release the pressurized gas from the inner wall;
Claim 1 or 2, characterized in that a dispersion cylinder is provided with a structure for introducing pressurized gas into the space formed by the inner cylinder and the outer cylinder and releasing the pressurized gas from the inner cylinder. dispersion machine. (5) Pressure gas is introduced into a space made up of an inner bottom and an outer bottom, and the pressure gas is released from the inner bottom into the dispersion cylinder. A discharge port with a structure that introduces gas and releases the pressure gas from the inner wall, and a dispersion structure that introduces pressure gas into the space formed by the inner cylinder and the outer cylinder and releases the pressure gas from the inner cylinder. The disperser according to claim 1 or 2, characterized in that a cylinder is provided.