JPH0760091A - Powder and liquid continuous mixing device - Google Patents

Abstract

PURPOSE:To miniaturize a powder and liquid continuous mixing device and to perform continuous mixing and feed. CONSTITUTION:This device is provided with a powder supply means allowing cement to fall continuously from a storage tank 3, a liquid jet means 30 having nozzles at the center part of a cement falling stream and jetting a liquid in substantially all directions horizontally or obliquely downwardly to bring the same into contact with the falling stream and a means feeding the mixed slurry in the storage tank 3 to an objective place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously mixing powder such as cement and liquid such as water. In the present invention, "mixing" means kneading or dispersion of powder in a liquid.

[0002]

2. Description of the Related Art Cement milk or cement slurry in which cement is dispersed in water is often used for improving the ground.

[0003] In this case, conventionally, it is generally carried out by mixing cement and water into a vertical or horizontal tank while mixing them with an agitator. However, in this case, since it is a batch system, when a continuous mixer is used, for example, a mixing tank is provided in the upper part, a temporary storage tank is provided in the lower part, and the slurry that has been metered and mixed is in the lower temporary storage tank. It is stored in a container, and from there it is transported to the desired location by a pump or the like.

[0004]

However, in the batch method, it is not possible to obtain a homogeneous material over time, and it is necessary to prepare slurry while mixing at least several times the amount consumed. The volume of the mixing device per consumed amount increases, and the equipment cost and installation space increase.
Further, a control device for controlling a series of operations such as weighing, feeding, mixing, and transportation is required, which also increases the equipment cost.

On the other hand, the upper and lower two-stage semi-continuous mixing device basically has the same problem.

Therefore, an object of the present invention is to downsize the apparatus and to enable continuous mixing and conveying.

[0007]

[Means for Solving the Problems] The above-mentioned problems are the powder supply means for continuously dropping the powder from above the storage tank, and the discharge port at the center of the drop flow of the powder. Liquid jetting means for jetting the liquid in all directions substantially horizontally or obliquely downward to bring the discharged liquid into contact with the falling flow, and the mixed slurry or milk in the storage tank. The problem can be solved by providing a means for transporting the object to the target location.

A second aspect of the present invention is a powder supply means for continuously dropping powder from above a storage tank, and a powder supply means arranged substantially along the center of the drop flow of the powder and containing a liquid inside. A support shaft having a supply conduit formed therein and having a communication hole communicating with the supply conduit and opening to the outside is rotatably fitted outside the communication hole portion of the support shaft, and is displaced in the radial direction. A rotating collar having a discharge port formed in a penetrating state, and a means for transporting the mixed slurry or milk in the storage tank to a target location, the discharge port being horizontal or diagonally downward on the vertical surface. It is configured to open toward.

Continuous mixing device for body and liquid.

In the second aspect, it is possible to provide a dispersing blade that is provided above the position where the discharge port is formed and that is rotated around the vertical axis center across the falling flow of the powder.

[0011]

In the present invention, when a powder such as cement is dropped, when a liquid, for example, water is jetted from the center of the falling flow horizontally or obliquely downward in substantially all directions, water and cement It comes into contact with and falls into the storage tank in the form of dispersed water. As a result, they are mixed and can be transported as they are from the storage tank to the target location. Therefore, a stirrer is not usually required.

[0012]

The present invention will be described in more detail by way of examples with reference to the drawings.

FIG. 1 is an overall view including the mixing apparatus of the present invention. Powder, such as cement C, is put into a weighing hopper 1, which is sequentially cut out from the weighing hopper 1 by a screw feeder 2, and a storage tank 3 is provided. It is thrown in.
The amount of cutting from the screw feeder 2 is controlled by a cutting control device 4 that controls the rotation speed of the screw feeder 2.

A mixing cylinder 5 having the lower end immersed in the liquid surface is arranged above the storage tank 3, and the cement C cut out from the screw feeder 2 is put into the mixing cylinder 5.
The closing of the charging is performed by opening and closing the shutter 7 by the cylinder 6.

Numeral 8 is a bellows for preventing cement scattering.

The first water conduit 10 is passed through the bottom wall of the storage tank 3.
A is provided, and the second water is provided above the first water conduit 10A.
The water conduit 10B is connected. Furthermore, the second water conduit 1
A support shaft 20 is connected to the upper portion of 0B and receives the output of the rotary drive motor 11 and is rotated via the drive belt 12. The connection shaft 13 is integrated with the upper part of the support shaft 20, and about two or three dispersion blades 14, 14 are integrated with the upper end of the connection shaft 13 in the radial direction so that they are simultaneously rotated.

Reference numeral 15 denotes a bearing, which rotatably supports the first water conduit 10A,
Water supplied from the outside is fed into the first water conduit 10A. The introduced water passes through the second water conduit 10B, reaches the inside of the support shaft 20, and flows out to the outside through the communication hole 20a. A rotary collar 30 is rotatably fitted to the outside of the communication hole 20a of the support shaft 20. The rotary collar 30 is displaced in the radial direction and formed in a penetrating state.
0a and 30a are formed.

More specifically, the rotating collar 30 has a first
Riding on the upper end surface of the water conduit 10 </ b> A, loosely fitting around the support shaft 20, and slipping upward are restricted at the stepped portion of the support shaft 20. Further, the discharge port 30a has a plan view.
The radial direction and the displacement angle θ (see FIG. 4) are displaced by about 30 to 45 degrees and penetrate the outer peripheral wall of the rotating collar 30.
Furthermore, in the vertical plane, it is inclined horizontally or preferably downwardly at an inclination angle α of 10 to 20 degrees. Inclining upward from the horizontal is not preferable because it will blow up the cement. If the inclination angle exceeds 20 degrees,
Inadequate contact mixing between cement and water.

When the supplied water flows out from the communication hole 20a and is discharged from each of the discharge ports 30a, 30a, 30a, they are displaced at the displacement angle θ. Therefore, as a reaction force at the time of discharge, Water rotates about the support shaft 20 around the support shaft 20 in the counterclockwise direction in FIG. 4 according to the principle of the sprinkler. As a result, with respect to the falling flow of cement, an umbrella-shaped water film that is directed almost obliquely downward is generated, which comes into contact with the cement particles and mixing is achieved.

The mixed cement slurry passes through the filter 40 from the outlet 3a at the bottom of the storage tank 3,
It is transported to the destination by the pump 41. In order to prevent the cement slurry from agglomerating or forming dumplings at the bottom of the storage tank 3, the rake blade 4 is attached to the first water conduit 10A.
The two are integrated and rotate to disperse.

On the other hand, the water W is supplied to the filter 43,
It is supplied into the first water conduit 10A by the water supply pump 45 through the flowmeter 44. The amount of water supply is variable device 4
Adjusted by 6.

The liquid level in the storage tank 3 is adjusted by upper and lower limit level meters 47 and 48. The cement slurry concentration can be adjusted by the amount of cement cut out and the amount of water supplied.

Thus, mixing can be achieved only by projecting water onto the falling flow of cement. If necessary, for example, when the storage tank 3 has a viscosity of about mortar, the stirring and mixing force can be increased by providing the rotating shaft 10B of the storage tank 3 with one or more stirring blades. The mixing cylinder 5 can be omitted if the upper end of the wall surface of the storage tank 3 extends upward.

Although only one rotating collar 30 is provided in the above example, a plurality of rotating collars 30 may be provided in the height direction if necessary. The rotation number of the rotating collar 30 is 20 to 5
About 00 rpm is suitable. Further, it is also possible to provide a plurality of water jet lines described above for the falling flow of cement to form a plurality of umbrella-shaped water jet films to achieve contact mixing. On the other hand, in the above-mentioned example, the umbrella-shaped water jet film was formed by the rotation of the rotary collar 30, but as shown schematically in FIG. 5, the lower guide plate 50 and the upper guide plate 51 are arranged in all directions. It is also possible to inject water from the opening slit.

The present invention can preferably use cement as powder and water as liquid, but the same applies to other powders and liquids.

[0026]

As described above, according to the present invention, there are advantages that the apparatus is downsized and continuous mixing and conveying can be performed.

[Brief description of drawings]

FIG. 1 is a schematic view of the entire device of the present invention.

FIG. 2 is a vertical sectional view of a mixing means portion.

FIG. 3 is a longitudinal sectional view of a main part.

FIG. 4 is a view taken along line 3-3 of FIG.

FIG. 5 is a schematic diagram of a modified example.

Claims (3)

[Claims] 1. A powder supply means for continuously dropping powder from above a storage tank, and a discharge port at the center of the powder drop flow, which is horizontal or obliquely downward. A liquid jetting means for jetting the liquid in substantially all directions toward the discharge liquid to bring the discharged liquid into contact with the falling flow, and a means for transporting the mixed slurry or milk in the storage tank to a target location. A continuous mixing device for powder and liquid, which is characterized by being provided. 2. A powder supply means for continuously dropping the powder from above the storage tank, and a liquid supply conduit which is arranged along substantially the center of the falling flow of the powder and is formed inside. A support shaft having a communication hole communicating with the supply conduit and opening to the outside is rotatably fitted outside the communication hole portion of the support shaft, and is formed in a penetrating state by being displaced in the radial direction. A rotating collar having a discharge port, and means for transporting the mixed slurry or milk in the storage tank to a target location, and the discharge port is opened horizontally or obliquely downward on the vertical surface. A continuous mixing device for powder and liquid, characterized in that 3. The continuous mixing of powder and liquid according to claim 2, wherein a dispersion blade is provided above the position where the discharge port is formed and which is rotated around the vertical axis across the falling flow of the powder. apparatus.