JP2001219047A - Agitating method using agitation container having polygonal cylindrical filling volume - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agitation container which easily allows the object to be agitated uniform agitation and homogeneous agitation, an agitation method having high agitation efficiency and an agitating equipment which is light in weight and small-sized and suppressed power heat due to the agitation drive. SOLUTION: The agitation container having polygonal cylindrical filling volume is used and the turbulent flow is generated by applying the agitation force to the object to be agitated from the sidewall surface which forms the polygonal cylindrical filling volume and the part in which one part of the sidewall surface is made rugged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirring method by rotating, revolving, or oscillating, and more particularly to a stirring method suitable for uniformly mixing an agitated material, homogeneously diffusing a solute into a solvent, and washing dirt.

[0002]

2. Description of the Related Art As shown in FIG. 6, a stirring method by mixing and diffusing a solute into a solvent is generally such that a stirring vessel (201) having a circular cylindrical filling volume is filled with a stirring substance (104). Then, the stirrer (203) is inserted into the stirrer (201), and the stirrer (203) is rotated or revolved by the driving device (205) of the stirrer (203), and the area of the stirrer (203) in the rotation direction is rotated. The agitated material (104) is agitated by utilizing. At this time, a stirring rod having a plurality of blades attached to a stirring section is often used for the purpose of improving the stirring effect.

FIG. 7 shows a stirring rod (204) made of a magnetic material placed in the stirring vessel (201), and the stirring rod (204) is rotated or revolved by the magnetic force of a magnetic material driving device (206) installed outside. The stirrer (104) is stirred by utilizing the area of the stirring rod (204) in the rotation direction.

FIG. 8 shows a stirring method in which the stirring vessel (201) is rotated by tilting the axis (207) of the stirring vessel (201) at an inclination angle β, and revolves around a revolving axis (208). . When the stirring vessel (201) rotates, the side wall curved surface (202) forming the circular cylindrical filling volume and the stirring material (1) are rotated.
The stirring force resulting from the contact frictional resistance of the side wall curved surface (2)
02), and this stirring force is applied to the stirred product (104). The agitated material (104) near the side wall curved surface (202) starts dependent rotation with the rotation of the agitated vessel (201), and is located at the center of the filling volume due to the shearing force in the agitated material (104) generated at that time. The agitated substance (104) to be rotated successively rotates. However, when the shearing force for subordinate rotation in the agitated material (104) decreases, the flow of the agitated material (104) becomes a steady state, and the agitating effect cannot be expected. In the stirring using the low-viscosity stirrer, the contact friction resistance between the side wall curved surface (202) and the stirrer (104) is small, and the stirring efficiency is low. Therefore, in order to improve the stirring efficiency, the stirring container (201) is tilted and rotated, and the stirring container (201) is revolved.

[0005] In the case of performing a chemical reaction in the form of a mixed solution, generally a stirring vessel (201) having a circular cylindrical filling volume is used.
Are filled with several kinds of chemical reactants, and a chemical reaction is performed by these stirring methods. A stirring-type washing machine, which is generally called a washing machine, performs washing by using these stirring methods to elute a solute as a filth into water as a solvent.

[0006]

In the above-mentioned conventional stirring method using a stirring rod, the stirring force on the stirring object is reduced in the vicinity of the side wall curved surface forming the circular cylindrical filling volume or at the corner of the bottom surface. The stirring effect is remarkably reduced, and it is difficult to uniformly stir or uniformly stir the stirrer.

[0007] In the above-mentioned conventional stirring method for rotating the stirring vessel, it is difficult to expect a stirring effect only by generating a simple dependent rotation of the stirring object accompanying the rotation of the stirring vessel. With respect to a low-viscosity agitated product, the frictional coefficient μ is small, so that the agitation power is further reduced, and the agitation effect cannot be expected. Therefore, in the chemical reaction using the mixed solution, low-viscosity solutes and solvents are often handled, and here, uniform stirring is difficult. With respect to two or more types of agitated materials having a specific gravity difference, centrifugal force is generated in each agitated material by the rotation of the agitating container, and the agitated materials are separated or separated from each other. In the stirring type washing machine, there is a type in which a plurality of small blades or triangular prisms are attached for the purpose of improving the washing effect on the curved side wall of a circular cylindrical filling volume called a washing tank. Not reached.

[0008] The above-mentioned conventional stirring method in which the stirring vessel rotates and revolves, the structure of the stirring device is complicated, and the size of the stirring device becomes large. Also, the power heat from the drive unit is added to the agitated material,
Disturbance occurs when stirring a heat-responsive stirrer.

Accordingly, an object of the present invention is to provide a stirring vessel capable of easily and uniformly stirring a stirrer and a stirring method having a high stirring efficiency. An object of the present invention is to provide a stirring device.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention uses a stirring vessel having a polygonal cylindrical filling volume, and rotates or revolves or swings the stirring vessel to form a polygon. The agitation force is applied to the agitated material from the side wall plane forming the cylindrical filling volume or a part where the side wall plane is made uneven.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS When a stirring vessel having a polygonal cylindrical filling volume is rotated, a point on a side wall plane which intersects by drawing a straight line from the rotation axis to a side wall plane forming the polygonal cylindrical filling volume. Then, a stirring force is applied to the agitated material in a direction perpendicular to this straight line. Also, centrifugal force is generated in the agitated material along this straight line,
This centrifugal force acts on the agitated material as a reaction force from the side wall plane in the direction of the normal and the target at a point on the side wall plane.

At the uneven portion formed on a part of the side wall plane, the uneven shape moves in the rotation direction of the stirring vessel, thereby causing various turbulent flows in the stirred object. Thus, the stirring efficiency can be improved by generating the stirring force or the turbulent flow from the plane of the side wall forming the polygonal cylindrical filling volume to the stirred object.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a stirring vessel having a polygonal cylindrical filling volume according to the present invention and filled with a stirrer. The volume for filling the agitated material has a cylindrical shape having a polygonal cross section. Here, as an example, a stirring vessel (101) having a hexagonal cylindrical filling volume is shown. This hexagonal cylindrical filling volume has six side wall planes (102) and a hexagonal bottom surface (103) and side wall planes (102) for the purpose of further improving the stirring efficiency.
Are formed by a plurality of projections (109) attached to the projections. When this hexagonal cylindrical filling volume is filled with the stirrer (104), the stirrer (104) comes into contact with the six side wall planes (102), the hexagonal bottom surface (103) and the plurality of protrusions (109). When the stirring object (104) is filled in the stirring container (101) and is rotated around the axis (105) of the stirring container (101), the stirring force applied by the side wall plane (102) to the stirring object (104) is as follows. Stirring force caused by contact frictional resistance between the side wall plane (102) and the stirrer (104), and stirring force and side wall plane (102) caused by movement of the hexagonal cylindrical filling volume shape
The agitation force resulting from the movement of the projection (109) attached to the surface is a synergistic agitation force.

The agitation force resulting from the contact frictional resistance between the side wall plane (102) and the agitator (104) will be described below. In FIG. 2, which is an enlarged view showing a stirring force near the side wall plane (102), a straight line (1) extends from a point 0 on the axis (105) of the stirring vessel (101) to the side wall plane (102).
06), and let P be the intersection of the straight line (106) and the side wall plane (102). A surface pressure F1 is applied to the intersection P in the direction of the normal line (107) by the weight of the agitated object (104). When the stirring vessel (101) rotates, contact friction is instantaneously generated between the side wall plane (102) and the stirring object (104) at the intersection P. The friction coefficient μ and the surface pressure F1 of the side wall plane (102)
Is generated in the rotation direction on the side wall plane (102), and this force becomes the stirring force F2 to cause the stirring object (104) near the intersection P to perform the subordinate rotation in the rotation direction. When the agitated material (104) rotates in a subordinate manner, a centrifugal force F3 of the agitated material (104) is generated in the direction of the straight line (106). A reaction force F4 is generated. Therefore, the stirring force applied to the stirring object (104) located at the intersection P is the sum of the stirring force F2 and the stirring force F4. When the stirring vessel (101) having the cylindrical polygonal filling volume is rotated, the stirring force of the stirring object (104) is generated from the contact portion with the side wall plane (102), and the stirring force is generated by the stirring object (104). A turbulent flow that does not reach a steady state is generated therein, and a stirrer (104) located in the center of the cylindrical filling volume is sequentially stirred from near the side wall plane (102). When the rotation direction of the stirring vessel (101) is reversed in a timely manner, a turbulent flow occurs in the stirring object (104), and the stirring effect can be further improved.

The agitation force caused by the movement of the hexagonal cylindrical filling volume will be described below. The stirring vessel (10
1) Side wall plane (102) from point O on axis (105)
The normal (108) is lowered, and the intersection of the normal (108) and the side wall plane (102) is defined as Q. In FIG. 3 including this point O and the intersection Q and making a right angle with the axis (105) of the stirring vessel (101), a point on the side wall plane (102) separated from the intersection Q by a distance L1 in the counterclockwise direction is denoted by S. I do. A point on the side wall plane (102) separated by a distance L2 in the clockwise direction is defined as R. When the stirring vessel (101) rotates, the stirring force applied to the stirring object (104) at the intersection Q is changed to the side wall plane (10).
A stirring force F5 resulting from the contact frictional resistance between 2) and the stirring object (104) is obtained. The stirring force at the point S applied to the agitated object (104) can be expressed by F6 in a direction perpendicular to the point S with respect to the line segment OS, and the agitated object (104) near the point S is moved inside the cylindrical filling volume. On the other hand, the stirring force applied to the stirring object (104) in the vicinity of the point R can be expressed by F7 perpendicular to the line segment OR from the point R. That is, with the movement of the side wall plane (102) due to the rotation of the stirring vessel (101), the side wall plane (102) of the point R portion.
Pressure drop occurs at the point of contact between the material and the agitated material (104),
The agitated material (104) is drawn in the direction of movement of the side wall plane (102). Here, a turbulent flow is generated in the agitated object (104) without generating a simple flow in which the agitated object (104) rotates dependently on the rotation direction of the agitated container (101).

Next, the stirring force resulting from the movement of the projection attached to the side wall plane will be described below. FIG. 4 is an enlarged view of the essential part showing the stirring force near the protrusion (109) formed on the side wall plane (102). In FIG. 4, the inclination angle θ is inclined with respect to the rotation direction W of the stirring vessel (101). 10
At point T on the projection (109) attached to 2),
A straight line (111) is drawn from the point T in the direction of the normal (110) and the own weight. When the protrusion (109) rotates in the rotation direction W of the stirring container (101), the stirring object (104) becomes a straight line (111).
Against

## EQU1 ## A stirring force F8 is received from the projection (109) downward and rearward by an angle ε represented by ε = π / 2−2θ. That is, the agitated material (104) near the protrusion (109) receives a stirring force in the downward oblique direction of the cylindrical filling volume, and generates a turbulent flow. Therefore, the stirring force caused by the contact frictional resistance between the side wall plane (102) and the stirrer (104), the stirring force caused by the movement of the hexagonal cylindrical filling volume shape, and the protrusion attached to the side wall plane (102). The agitation force resulting from the movement of the object (109) is combined with the agitation of the agitated object (104) with high efficiency.

As shown in FIG. 5, when the axis (105) of the agitating container (101) is rotated at an inclination angle α, the agitated material (104) oscillates in the filling volume by its own weight, and the agitated material (104) ) Generates turbulence, and the stirring efficiency is improved. In addition, when the inclined stirring container is revolved around the orbital axis, the stirring efficiency is further increased.

In this experiment, a stirrer having a regular hexagon of 4 cm on a side and a filling capacity of about 400 cc has a viscosity of about 1000 cc.
Fill two kinds of coloring liquid of Poise, and stir this container about 1
When it was rotated at 80 rpm to 200 rpm by tilting by 5 degrees, homogeneous stirring could be performed in about 5 minutes. When stirring a highly viscous agitated material, a sufficient stirring effect can be obtained even at a low speed of 80 rpm or less.
It has been clarified that a high-speed rotation of at least 00 rpm improves the stirring effect. Here, it has also been clarified that high stirring efficiency can be obtained only by rotating the stirring container.

[0019]

According to the present invention, the side wall plane forming the polygonal cylindrical filling volume and the irregularities formed on the side wall plane generate a turbulent flow of the agitated material due to the rotation or revolution of the stirring vessel. Therefore, separation and layer separation of the stirred material can be prevented, and uniform and uniform stirring can be performed. In addition, since the stirring efficiency can be improved only by rotating the stirring container, it is possible to provide a stirring method with increased productivity, and to achieve a stirring mechanism that reduces the weight of the stirring device and suppresses generation of driving heat. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a stirring vessel having a regular hexagonal cylindrical filling volume filled with a stirrer.

FIG. 2 is an essential part enlarged view showing a stirring force caused by contact frictional resistance near a side wall plane forming a regular hexagonal cylindrical filling volume.

FIG. 3 is a partially enlarged view showing a stirring force caused by a movement of a side wall plane near a side wall plane forming a regular hexagonal cylindrical filling volume.

FIG. 4 is an enlarged view of a main part showing a stirring force caused by a movement of a projection on a side wall plane forming a regular hexagonal cylindrical filling volume.

FIG. 5 is a diagram showing a stirring state by a stirring method using a stirring container having a regular hexagonal cylindrical filling volume.

FIG. 6 is a view showing a stirring method using a stirring rod in a conventional stirring method.

FIG. 7 is a diagram showing a stirring method using a magnetic stirring bar in a conventional stirring method.

FIG. 8 is a diagram showing a stirring method for rotating and revolving a stirring vessel by a conventional stirring method.

[Explanation of symbols]

 101 Stirring vessel having a polygonal cylindrical filling volume 102 Side wall plane forming a polygonal cylindrical filling volume 103 Bottom surface forming a polygonal cylindrical filling volume 104 Stirred object 105 Polygonal cylindrical filling volume The axis of the stirring vessel having 106 The straight line from the axis of the stirring vessel to the side wall plane 107 The normal from the side wall plane 108 The normal from the side wall plane 109 The protrusion formed on the side wall plane 110 The method lowered from the protrusion Line 111 Straight line in the direction of its own weight lowered from the protrusion 201 Stirring vessel having a circular cylindrical filling volume 202 Side wall curved surface forming a circular cylindrical filling volume 203 Stirring bar 204 Magnetic stirring bar 205 Stirring rod driving device 206 Driving device of magnetic stirring bar 207 Shaft center of stirring vessel having circular cylindrical filling volume 208 Revolution axis of stirring vessel having circular cylindrical filling volume

Claims (2)

[Claims] An agitating container having a polygonal cylindrical filling volume, wherein a part of a side wall plane forming the cylindrical filling volume is made uneven. 2. A stirrer is filled in the stirrer, and the stirrer is rotated, revolved, or swung, and irregularities formed on a side wall plane or a part of the side wall plane forming the polygonal cylindrical filling volume. Stirring method characterized by applying a stirring force to a stirring object from a location