JPS597497B2 - mixer - Google Patents

Description

Detailed Description of the Invention The present invention not only allows two or more types of powder to be uniformly mixed in a short period of time, but also enables spraying of a liquid onto the powder to uniformly humidify the liquid, which consumes less power. The present invention relates to a mixer equipped with a grinding mechanism that can be used for grinding.

BACKGROUND ART A type of mixer using two concentrically arranged rotors for mixing powder has been known (for example, Utility Model Application Publication No. 7731 of 1932).

However, in this type of mixer, although the rotational speed of the inner rotor is faster than the rotational speed of the outer rotor, the length of the multiple stirring arms protruding from the inner rotor is long, which is required for high-speed rotation. Considering the magnitude of the driving power and the magnitude of the load acting on the stirring arm, it is not considered suitable for high-speed rotation.

Furthermore, the stirring arms and vanes provided on the inner and outer rotors do not have any mechanism for actively moving the materials to be mixed in the axial direction of both rotors for uniform mixing, and the inner rotor The tip of the stirring arm is ladle-shaped and does not have a crushing function. For this reason, it is not possible to uniformly mix a wide range of mixing ratios, such as 10:1 to 1000:1, in a short time, as well as when there is a large difference in particle size or specific gravity between mixed powders. .

As a mixer that meets these requirements, for example, a fluidized mixer has been proposed, but even in this case, the disadvantage of requiring large driving power to mix powder cannot be solved.

The present invention solves the above-mentioned disadvantages, and includes a crushing mechanism in the mixer as an element for efficient mixing.
The object of the present invention is to provide a mixer that can mix a wide range of mixing ratios in a short time with low horsepower and has good liquid mixing performance.

To explain the embodiment, a material input port 2 is provided in the upper center of a cylindrical container 1 whose axis is arranged horizontally, and an outlet 4 that is opened and closed by a lid 3 is provided in the lower center. At the center is a high-speed rotor 5 that rotates at high speed on its axis.
to be placed.

The high-speed rotor 5 has a plurality of short impact bodies 6 on its cylindrical surface.
to protrude.

In the embodiment, a large number of blades formed by cutting a plate material into a rectangular or appropriate shape are shown, but the impact body 6
is a T at the tip that protrudes radially on the cylindrical surface of the high-speed rotor.
The contract may be a shaft with a horizontal arm or a swinging hammer.The arrangement of the impacting body 6 may be random, but it is necessary to effectively interact with the low-speed rotor described below. In order to do this, it is inclined at an angle θ with respect to the axis of the rotor 5, and is protruded from the circumferential surface of the rotor 5 in a helical arrangement.

This helical arrangement and the inclination of the angle θ allow the material to be processed to be moved in the axial direction of the rotor 5 by the rotation of the high-speed rotor 5, as shown by arrow A in FIG. The direction of the helix or the inclination of the angle θ are opposite to each other on the left and right sides of the arrow A, and the material to be processed moving in the axial direction is
It can be configured so that it can be moved from the axial center of the container body 1 in both left and right directions in the axial direction, or conversely, from both ends of the shaft toward the center. A low-speed rotor 7 formed into a basket shape of a rod or the like is concentrically arranged around the outer periphery of the high-speed rotor 5, and the cylindrical inner periphery of the vessel body 1 is attached to the tip of an arm 8 extending radially from the rotor 7. A plurality of stirring blades 10 close to the surface 9 are attached to the same body in an appropriate arrangement. Although the shape of the stirring blades 10 is arbitrary, as shown in the figure, they are bent in a spiral shape between the two arms 8 and attached in a so-called rim screw shape, and by rotating each stirring blade 10 at a low speed, the vessel body 1 The powder inside the high-speed rotor 5 as shown by the broken line arrow B
The direction of the helix can be determined so that it can be moved in the opposite direction to the direction of movement (arrow A). Although the high-speed rotor 5 and the low-speed rotor 7 may be rotated in the same direction, it is possible to increase the relative rotational speed difference so that the rotational speed of the low-speed rotor 7 does not need to be increased more than necessary. It is preferable to rotate them in opposite directions as shown by arrow C and dashed arrow D.

In the figure, 11 is a drive shaft of the high-speed rotor 5, and 12 is a drive shaft of the low-speed rotor 7, which are rotated at high or low speed by a drive mechanism (not shown). Drive shafts 11 and 12 are supported by a frame 15 via bearings 13 and 14, respectively. Reference numeral 16 denotes an end wall of the vessel body 1, and in the embodiment, a case where the rotors 5 and 7 are rotated by the drive shafts 11 and 12 is shown, but it is possible to make the vessel body 1 long and penetrate through both end walls. Of course, each rotor may be rotated by the inner and outer axes.

Reference numeral 17 denotes a liquid spray, which is provided at the material input port 2.

The present invention has the above-mentioned configuration, and when dry powder is mixed, the powder at the required several mixing ratios is mixed at 60% of the total volume of the container body 1.
The high speed rotor 5 and the low speed rotor 7 are rotated.

The low speed rotor 7 moves all the powder vertically and horizontally to mix it.
At this time, powder having a large specific gravity tends to sink to the bottom, but the action of the low-speed rotor 7 and the high-speed rotor 5 constantly lifts the powder upward, thereby preventing this tendency. Powder falling from above falls onto the high-speed rotor 5, is crushed by the impacting body 6 rotating at high speed, and mixed into the powder again. Efficient mixing is achieved because of the stirring action.

The mixing time is 5 minutes on average and about 10 minutes at most. The power required to operate the mixer is determined by the fact that the impact body 6 rotates at high speed in the high-speed rotor 5, and its protruding length in contact with the powder is shortened to reduce the rotational resistance received from the powder. can be reduced regardless of Further, in the low speed rotor 7, the large stirring blade 10 provided close to the cylindrical inner peripheral surface 9 of the vessel body 1 has an operating speed of about 25 R. P.
Since the powder is lifted upward into the container body 1 at a low speed of M, the required power is small. Next, when performing liquid addition and mixing, if 5 (fl) to 15 (: L) of liquid is sprayed and added after dry powder mixing, many small blocks will be formed because the liquid initially aggregates. However, These are lifted upward by the blades 10 of the low-speed rotor 7, and when they fall, they are crushed and dispersed by the impact body 6 of the high-speed rotor 5, so that they are uniformly mixed. As a result of synergistic pulverization and agitation with horizontal and vertical agitation by the low-speed rotor, even when the difference in particle size and specific gravity between the powders to be mixed is large and the mixing ratio is wide.
The effect is that uniform mixing can be performed with high efficiency with less required power.

[Brief explanation of drawings]

FIG. 1 is a partial longitudinal cross-sectional view and a partial cross-sectional view of the embodiment. Figure 2 shows the same 1... vessel body, 2... material input port, 4...
...Discharge port, 5...High speed rotor, 6...
...Impact body, 7...Low speed rotor, 10...
... Stirring blade.

Claims (1)

[Claims] 1. A high-speed rotor with a plurality of short impact bodies arranged in a helical manner on the surface is provided in a cylindrical container body equipped with a material input port and a material discharge port at the center in the longitudinal direction. A stirring blade and a spiral-shaped low-speed rotor are installed on the outer periphery, concentrically with the high-speed rotor and close to the cylindrical inner circumferential surface of the vessel body, and the rotation of both rotors moves the material inside the vessel in the axial direction, while also moving the material at high speed. A mixing machine characterized in that each of the helices is oriented such that a rotor and a low-speed rotor move the material in opposite directions. 2. The impact body is arranged so that the rotation of a high-speed rotor moves the material in the container in both axial directions or toward the center of the container, and the rotation of a low-speed rotor moves the material in the opposite direction. A mixer according to claim 1, which is provided with stirring blades. 3. The mixer according to claim 1 or 2, wherein a part of the container body is equipped with a liquid spray.