JPH04251710A - Mixer - Google Patents

Abstract

PURPOSE:To eliminate the adhesion of a kneaded material to a ceiling and an area in the neighborhood of a feeding inlet of an agitation tank of a batch- type mixer and carry out continuous operation of the batch-type mixer for a long time. CONSTITUTION:A drive shaft 4 is supported rotatably at the center of an agitation tank 1, and an agitating element 6 is provided on the lower section of said drive shaft 4, and a peeling element 7 is provided on the position right under a ceiling 3 of the upper section of the drive shaft respectively, and said drive shaft 4 is rotated by a motor 16 annexed to the agitation tank 1. Powder and liquid fed into the agitation tank 1 are agitated and kneaded by the agitation element 6, and a kneaded material scattered upward is scraped off by the peeling element 7 and also adhesion thereon is prevented, and the continuous operation can be carried out for a long time without the necessity of maintenance.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixer used for mixing powder and liquid.

0002

BACKGROUND OF THE INVENTION Batch type mixers are often used for mechanically kneading cement as a powder and water as a liquid. In this batch mixer, stirring blades are usually installed at the bottom of a vertical cylindrical stirring tank. Cement, water, etc. are introduced from the ceiling of the stirring tank, and the stirring blades are driven to rotate. It is designed to knead both materials, and is discharged from the bottom.

0003

[Problems to be Solved by the Invention] However, when the above-mentioned conventional batch mixer is automated and operated continuously, raw materials and kneaded materials adhere to the ceiling of the stirring tank and around the input port due to long-term operation. There is a problem in that the deposits are removed and the deposits need to be removed periodically, and maintenance is extremely time-consuming. In view of this, the present invention has been developed to enable continuous operation for long periods of time in a batch-type mixer, without causing raw materials (kneaded material) to adhere to the ceiling of the stirring tank or near the inlet, even during long periods of continuous operation. It was created for the purpose of providing a mixer.

0004

[Means for Solving the Problems] In order to solve the problems of the above-mentioned conventional techniques, the present invention rotatably supports a drive shaft by an upper bearing in the center of a stirring tank, and a lower part of the drive shaft The apparatus is characterized in that a stirring blade is provided in the upper part thereof, and a separation blade is provided in the upper part of the stirring tank at a position directly below the ceiling, and rotation is transmitted to the drive shaft from a drive source attached to the stirring tank.

[0005]

[Operation] When a predetermined amount of powder and liquid is put into the mixing tank from the input port and the drive source is started, the rotation of the drive shaft causes the stirring blades and stripping blades to rotate simultaneously, and the rotation of the stirring blade causes the powder to be powdered. The body and liquid are kneaded, and the kneaded material reaching the upper part of the stirring tank is scraped off by the peeling blade, thereby preventing the kneaded material from adhering to the upper part of the inside of the stirring tank.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 shows a longitudinal section of an embodiment of a mixer according to the invention, and FIG. 2 shows the same plane.

The stirring tank 1 has a short vertical cylindrical shape, has a funnel-shaped bottom 2 at the bottom, a ceiling 3 at the top, and a drive shaft 4 at the axial center with a bearing 5 at the top. It is rotatably supported by. A stirring blade 6 is provided below the drive shaft 4, and a stripping blade 7 is provided above the drive shaft 4 directly below the ceiling 3.

As shown in a plan view in FIG. 3 and in cross section in FIG. 4, a plurality of the stirring blades 6 (in the figure, 8 The boss portion 8 is fitted onto the drive shaft 4 and fixed thereto.

As shown in the plan view in FIG. 5 and in cross section in FIG. 6, a plurality of peeling blades 7 (16 blades in the figure) are arranged around the disc-shaped substrate 12 that protrudes concentrically from the boss portion 11. feather 13
, 13, . be done.

A plurality of (six in the figure) fixed blades 14, 14, . . . are provided protruding in the radial direction on the inner peripheral surface of the stirring tank 1 at equal intervals in the axial direction.

A support member 15 is provided on the ceiling portion 3, and a motor 16 serving as a drive source is fixed to this support member 15, and an output shaft 17 of this motor 16 and the drive shaft 4
A belt 20 is wound around pulleys 18 and 19 connected to the upper ends of the belt 20, and the drive shaft 4 is rotated by the drive of the motor 16. The ceiling part 3 is provided with powder inlets 21, 21 and a liquid inlet 22, respectively, and a discharge port 23 is opened in the center of the bottom part 2, and can be opened and closed by a valve 24.

Next, the operation of the above embodiment will be explained. When the powder inlets 21, 21 and the liquid inlet 22 on the ceiling 3 of the stirring tank 1 are opened, powder and liquid are introduced, and the motor 16 is driven, the pulley 18, belt 20, and pulley 19 are
Through this, the drive shaft 4 rotates, and the rotation of the stirring blades 6 mixes the powder and liquid. During this kneading, the kneaded material is
The kneaded material that scatters and tries to adhere to the lower surface or the vicinity of the lower end of the input ports 21, 21, 22 is scraped off by the rotation of the peeling blade 7, and is dropped downward and does not remain attached thereto. Further, since the disk-shaped substrate 12 extends over a required radius from the center of the separation blade 7, it acts as a barrier for the kneaded material scattered on the lower surface of the ceiling portion 3, and is prevented from flying onto the ceiling portion 3. The kneaded material adhering to the lower surface of the substrate 12 is difficult to adhere to because of the centrifugal force exerted by the rotation of the peeling blade 7, and even if it does adhere, it is shaken off by the centrifugal force so that it does not adhere and solidify. These eliminate the need for dismantling the stirring tank 1 for maintenance, and enable long-term continuous operation.

[0013]

[Effects of the Invention] As explained above, according to the present invention, the kneaded material kneaded by the stirring blades does not adhere to the ceiling of the stirring tank or near the inlet, and as a result, it can be continuously used for a long time without maintenance. This makes it possible to operate the machine and improve work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of a mixer according to the present invention.

FIG. 2 is a plan view of the mixer of FIG. 1.

FIG. 3 is a plan view of the stirring blade in FIG. 1.

FIG. 4 is a sectional view of the stirring blade in FIG. 1.

FIG. 5 is a plan view of the separation blade in FIG. 1.

FIG. 6 is a sectional view of the separation blade in FIG. 1.

[Explanation of symbols]

1 Stirring tank 2 Bottom 3 Ceiling part 4 Drive shaft 6 Stirring blade 7 Separation wing 9 Board 10 Feather 12 Board 13 Feather 16 Motor as a driving source 21 Powder inlet 22 Liquid inlet 23　Discharge port 24 Valve

Claims (2)

[Claims] 1. A drive shaft is rotatably supported in the center of the stirring tank by an upper bearing, a stirring blade is provided at the lower part of the drive shaft, and a stripping blade is provided at a position directly below the ceiling in the upper part of the drive shaft. A mixer characterized in that rotation is transmitted to a drive shaft from a drive source attached to a stirring tank. 2. The mixer according to claim 1, wherein the separation blade has a disc-shaped substrate, and has a structure in which blades are provided on the substrate.