JPH0557163A - Eccentric rotation mixing / cleaning device - Google Patents

Abstract

(57) [Abstract] [Purpose] A mixing device capable of cleaning the inside of a mixing container without performing any special operation or providing a device. [Structure] a) A vessel wall 13 extending upward A container 10 that has: b) a rotation mechanism (a motor 12 and a motor 12 and a rotation shaft) that rotates the container 10 about a vertical line 16 that does not coincide with the vertical center axis 15 of the container 10 (the rotation symmetry axis when the container 10 is a rotationally symmetric body). And a rotating shaft 11). [Effect] By rotating the container 10 at a relatively low speed, the fluid in the container can be mixed. Also,
The cleaning liquid is put into the container 10 and rotated at a relatively low speed to clean the inside of the container 10, and the cleaning liquid is discharged from the container 10 by a centrifugal force by rotating at a high speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mixing fluids such as liquids and powders, which has a function of cleaning the inside of a container.

[0002]

2. Description of the Related Art When a liquid acid or a solid salt is dissolved in water, or an oil is suspended in water, and further, wheat flour which is a powder and buckwheat flour which is another powder The process of mixing two kinds of fluids is performed in all fields of industry, such as when mixing. In the case of performing such a mixing treatment, conventionally, a stirring rod is inserted from above a container containing two kinds of fluids and rotated, or a stirrer is put into the container and magnetic force or the like is applied from the outside of the container. A method such as rotating a stirrer was used.

[0003]

For example, when a mixing device is used for mixing various chemicals in a laboratory, or when the mixing device is used in a production process of a small amount of a large variety of products, a certain two kinds of fluids are mixed. After mixing, another two fluids need to be mixed in the same mixing device. In this case, if the former mixture is mixed with the latter mixture, various inconveniences occur, and therefore, it is necessary to wash the inside of the mixing container once between them. In a conventional mixing device, the inside of the mixing container is cleaned by spraying a high-pressure cleaning liquid on the inner wall of the mixing container or rubbing with a brush. As described above, in the conventional mixing device, the operator needs to perform the washing operation, and even if it is automated, it is necessary to separately attach the high-pressure spraying device and the brush rotating device. The present invention has been made to solve such a problem, and its object is to clean the inside of the mixing container without performing any special operation or providing a device. It is to provide a mixing device that can do it.

[0004]

Means for Solving the Problems A mixing / cleaning apparatus according to the present invention made to solve the above problems comprises: a) a container having a vessel wall extending upward, and b) a vertical center of the container. And a rotation mechanism for rotating the container about a vertical line that does not coincide with the axis.

[0005]

When the container a) is rotated by the rotating mechanism b),
The container rotates eccentrically because its axis of rotation does not coincide with the center axis of the container. That is, the vessel wall of the container approaches or moves away from the axis of rotation, and vibrates. For this reason, put two (or more) fluids in the container,
By rotating the vessel at a relatively low speed, the mixture of fluids in the vessel is effectively mixed by the vibrating vessel wall. Also, after the mixing process of a certain type of fluid is completed,
When performing a mixing process of another type of fluid, a cleaning liquid such as water is put in the container a) and the container is rotated at a low speed at first. As a result, the vessel wall of the container is washed with the washing liquid by the same action as in the case of the above mixing. At this time, since the vessel wall of the container a) spreads upward, the water line of the cleaning liquid rises along the vessel wall, but the rotation speed of the container is set so that the water line reaches the upper end of the vessel wall. It is desirable to keep. After the cleaning of the inner wall of the container is completed, finally, by rotating the container at a high speed, the cleaning liquid in the container is automatically discharged by the centrifugal force without tilting the container. It is desirable that the shape of the cross section when the container is cut on a horizontal plane is circular (the shape of the container at this time is an inverted truncated cone), but it may be an ellipse or a quadrangle with rounded corners.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An eccentric rotary mixing / cleaning device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1A is a partial vertical cross-sectional view of the device of this embodiment, and FIG. 1B is a plan view. As shown in FIG. 1 (a), the eccentric rotary mixing / cleaning apparatus of this embodiment is composed of a mixing container 10 and a motor 12 for rotating the container 10. The container 10 is shown in FIG.
As shown in Fig. 1, the cross section is circular, and as shown in Fig. 1 (a), the side wall is in the shape of an inverted frustoconical shape that widens upward. The motor 12 rotates the container 10 with a rotating shaft 11 projecting downward from the bottom of the container 10. The center (that is, the rotation axis) 16 of the rotating shaft 11 is the central axis of the container 10 (rotational symmetry of an inverted truncated cone). Axis) 15 to distance d
It is attached at a position shifted by (this is called eccentricity 17). When the two types of fluids are mixed using the eccentric rotary mixing / washing apparatus of this embodiment having such a configuration, the container 10 is rotated at a relatively low speed. The rotation speed at this time needs to be appropriately adjusted according to the fluidity of the mixture, but if the maximum speed is set within the range in which the mixture does not jump out of the container 10, the stirring efficiency is good. Then, since the rotating shaft 16 is eccentric from the central axis 15 of the container 10, as shown in FIG. 2A, when attention is paid to a certain point, the side wall 13 of the container 10 moves toward and away from the rotating shaft 16 and vibrates. Come to do. Due to the movement of the side wall 13, the two kinds of fluids in the container are sufficiently stirred and mixed to form a uniform mixture. Next, after the mixing process of a certain type of fluid is completed and before another type of fluid is mixed, it is necessary to completely remove the previous mixture remaining on the bottom or inner wall of the container 10. is there. Therefore, a cleaning liquid such as water is put into the container 10 and the container 10 is rotated at a relatively low speed at first. Then, first, as shown in FIG. 2B, the cleaning liquid cleans and cleans the inner wall of the container 10. The rotation speed of the container at this time is preferably set so that the water line 14 of the cleaning liquid reaches the upper end of the side wall 13 (due to the difference in the fluidity of the mixture and the fluidity of the cleaning liquid, the state of FIG. 2A). It is not possible to uniformly say which is higher, the rotation speed which becomes (1) or the rotation speed which becomes the state of FIG. In this way, after the inner wall of the container 10 is sufficiently washed, the container 1
0 is rotated at a high speed, and as shown in FIG. 2C, the cleaning liquid is completely discharged from the container 10 by centrifugal force. After that, another kind of fluid can be put in the container 10 and agitated / mixed as shown in FIG. 2 (a). Although the motor 12 directly drives the rotary shaft 11 of the container 10 in the example of FIG. 1, it may of course be driven via a transmission gear or the like.

[0007]

The eccentric rotary mixing / washing device according to the present invention does not require any troublesome operation after the initial fluid mixing process and does not require the use of a special device. The inside of the container can be washed. Therefore, since the mixing and cleaning can be performed continuously and automatically, the eccentric rotary mixing / cleaning apparatus according to the present invention can be used in a process for producing a small amount of a large variety of mixtures. Particularly suitable.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view (a) and a plan view (b) of an eccentric rotary mixing / cleaning device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a container during mixing (a), cleaning (b), and cleaning liquid discharge (c) processing by the eccentric rotation mixing / cleaning device of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Mixing container 11 ... Rotating shaft 12 ... Motor 13 ... Container side wall 15 ... Container central axis 16 ... Container rotating shaft 17 ... Eccentricity

Claims (1)

[Claims] 1. An eccentric rotary mixing system comprising: a container having a vessel wall that expands upward; and a rotating mechanism that rotates the container around a vertical line that does not coincide with a vertical center axis of the container.・ Cleaning device.