JPH0392B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a continuous mixer that continuously mixes materials such as liquid and powder or granules.

(Prior art) The present invention is based on a patent application previously filed by the inventors.
This is an improved invention related to No. 60-6235, and a partially omitted vertical sectional view of the continuous mixer related to the patent application is shown in FIG.

This continuous mixer consists of a mixing tank 10 having a truncated conical shape formed by an upper plate, a side wall, and a lower plate, and a rotating mixer 20 disposed within the mixing tank 10. The rotating mixing body 20 has an inverted truncated conical shape, which is substantially the same shape as the mixing tank 10, by an upper rotating surface 20a and a side rotating surface 20b.

In addition, there is a supply port 10 for mixed materials at the top of the mixing tank 10.
a is formed, and as the rotating mixture body 20 rotates, powder P and liquid W are introduced from this supply port 10a.

The charged mixed materials P and W are scattered radially around the rotating cone 30 due to its rotational centrifugal force, and are scattered by pins 40, 40, etc. erected on the upper rotating surface 20a of the primary mixing chamber _r1 . After being mixed firstly and then secondarily mixed by the protrusions 50, 50... installed upright on the side rotating surface 20b of the secondary mixing chamber _r2 , the mixed materials are continuously discharged from the discharge port 60. be done.

In this mixing tank 10, in order to retain the charged mixed materials P and W for a required time, a side rotating surface 20 is used.
b is formed as a downwardly inclined surface. Intersection angle α between the so-called horizontal upper rotating surface 20a and the side rotating surface 20b
is formed into an acute angle. As a result, the mixed materials P and W are scattered in the horizontal radial direction in the mixing chamber _r1 , reach the outer peripheral wall 70, are bent inward at an acute angle, and reach the next mixing chamber _r2 . In the mixing chamber _r2 , the mixed materials P and W are subjected to an upward force due to centrifugal force, and are kept there for a required period of time.

(Problems to be Solved by the Invention) However, the continuous mixer having the above structure cannot be used in cases where the mixed material itself does not have fluidity, such as in so-called humidified mixing where powder is mixed with a small amount of water. When the mixed material that was scattered horizontally at r ₁ and reached the outer peripheral wall 60 is bent inward at an acute angle, the outer peripheral wall 6
A phenomenon of clogging near 0 occurs. Mixing room r ₁
It is not possible to smoothly transfer the mixture from one to the next mixing chamber _R2 .

(Means for Solving the Problem) Therefore, in order to solve the problem, the present invention forms the mixing tank in a shape in which the center part is bulged out by an upper inclined body surface and a lower inclined body surface, and also has a similar shape. The rotating mixture body disposed inside also has a bulge in the center by an upper inclined rotating surface and a lower inclined rotating surface, and the intersection angle between the upper inclined rotating surface and the lower inclined rotating surface is formed into an obtuse angle. Therefore, the mixed material inputted from the supply port formed at the upper part of the mixing tank scatters onto the outer circumferential wall on the upper inclined barrel surface and then bends smoothly when entering the lower inclined barrel surface, so that it may not become clogged near the outer circumferential wall. do not have. Moreover, in the mixing chamber formed by the lower inclined body surface and the lower inclined rotating surface, the mixed material receives an upward force along the inclined surface due to the centrifugal force of the rotating mixer, so that the so-called mixed material does not descend suddenly. Sufficient residence time can be obtained.

(Example) The continuous mixer of the present invention will be explained in detail below based on the drawings.

FIG. 1 is a partially omitted vertical sectional view of a continuous mixer according to the present invention. The continuous mixer consists of a mixing tank 1 and a rotary mixer 2 arranged in the mixing tank 1 and rotating. The mixing tank 1 has an upper inclined body surface 11 that is inclined outwardly and downwardly with respect to the center of rotation, and an upper inclined body surface 11.
A lower inclined body surface 1 which is continuously inclined inwardly and downwardly.
2 are formed in an obtuse angle shape with an intersecting angle β, and the central portion as a whole has a bulged shape. Further, a material supply port 13 is formed in the upper part of the mixing tank 1. Furthermore, below the material supply port 13, a pipe 14 for supplying liquid, for example, is provided together with a dispersion rotor 15, and the mixed material, for example, powder and liquid, are brought together at a distance from the material supply port 13 to supply the material. This prevents adhesion near the opening 13.

On the other hand, the rotating mixer 2 provided in the mixing tank 1 is
An upper inclined rotational surface 21 inclined outward and downward from the center of rotation, and a lower inclined rotational surface 2 inclined inward and downward.
Similar to the mixing tank 1, the mixing tank 1 has a bulging shape at the center with an intersection angle β. That is, the mixing tank 1 and the rotating mixing body 2 are configured to have substantially the same shape, with each inclined body surface and each inclined rotating surface making an obtuse angle of intersection β. This rotating mixture 2 is supported by a rotating shaft 3 via a rotating cone 23.

Therefore, there is a mixing chamber between the mixing tank 1 and the rotating mixer 2.
R ₁ and R ₂ are formed at an intersection angle β, that is, a continuous obtuse angle.

In the mixing chambers R ₁ and R ₂ , a plurality of protrusions 4, 4, . . . and 5, 5, . These protrusions 4, 4..., 5, 5... can be spiral-shaped or
It is erected in a planar shape such as a ring shape or a radial shape.

Furthermore, a discharge port 16 is formed at an appropriate location below the mixing tank 1 for carrying out the mixed materials.

Next, a mixing operation using the continuous mixer having the above configuration will be explained.

First, the drive motor and belt (none of which are shown)
The electric pulley 6 provided at the lower end of the rotating shaft 3 is rotated at a predetermined speed via the rotating mixer 2 into the mixing tank 1.
Rotate it inside. In such a state, the powder P is dropped from the material supply port 13 and the supply pipe 1
Inject an appropriate amount of liquid W from step 4. The powder P is dispersed and scattered by the upper part of the dispersion rotor 15, and the liquid W is dispersed in the gap O formed between the dispersion rotor 15 and the rotating cone 23.
The mixture becomes a thin film and is transported to the mixing chamber _R1 formed by the upper inclined rotating surface 21 and the upper inclined trunk surface 11, where it is mixed in a shearing manner by the protrusions 4, 4, . . . Ru. Since this mixing chamber R ₁ is formed at an angle, the mixing path becomes longer (compared to the mixing chamber r ₁ shown in FIG. 2), so that sufficient mixing can be obtained. After mixing in mixing chamber R ₁ , lower inclined barrel surface 1
2 and the lower inclined rotating surface 22 form the next mixing chamber R ₂
Then, they are mixed in the same way at the protrusions 6, 6, and so on.

In the mixing chamber R ₂ , the centrifugal force becomes a force that causes the mixed material to rise onto the inclined surface, and the mixed material that has reached the mixing chamber R ₂ becomes temporarily stagnant. Moreover, in this stagnation state, the material is newly sent from the mixing chamber _R1 and sufficiently mixed with the mixed material.

As described above, since the mixing chambers R ₁ and R ₂ are continuous in an obtuse angle, even materials with poor fluidity such as humidified powder can be smoothly transferred without clogging.

(Effects of the Invention) As explained above, in the continuous mixer of the present invention, the mixing tank and the rotating mixer are each formed in the shape of a bulge in the center, so even mixed materials with low fluidity such as powder can prevent clogging in the mixing path. A smooth mixing process can be obtained without any generation, and frequent maintenance work is not required.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted longitudinal cross-sectional view of a continuous mixer according to the present invention, and FIG. 2 is a partially omitted longitudinal cross-sectional view showing a conventional continuous mixer. 1... Mixing tank, 11... Upper inclined body surface, 12...
... Lower inclined body surface, 2 ... Rotating mixture, 21 ... Upper inclined rotating surface, 22 ... Lower inclined rotating surface, 4, 4
..., 5, 5... protrusion, R ₁ , R ₂ ... mixing chamber, β...
...obtuse intersecting angle.

Claims (1)

[Claims] 1. A rotating mixing body is disposed in a mixing tank, and the mixing material inputted from the material supply port at the top of the mixing tank is mixed by rotating the rotating mixing body, and the mixing tank has an upper inclined body surface. The rotating mixture has a bulging central portion formed by an upper inclined rotating surface and a lower inclined rotating surface. A continuous mixer characterized by having multiple protrusions installed upright.