JPH09271650A - Stirring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and strongly shear and destruct particles of fat or air bubbles suspended in a liquid by arranging a cylindrical member having a large number of holes in the vicinity of stirring blades so as to surround the outer periphery of the stirring blades. SOLUTION: A liquid 3 to be stirred is housed in a container 2 and a stirring blade 5 is suspended from a drive device through a stirring shaft 4. The stirring blade 5 has a standard turbine shape and is formed by radially fixing a plurality of flat plate blades 5b to a disc 5a. A cylindrical member 6 made of a metal net is provided so as to surround the outer periphery of the stirring blade 5 and engaged with the bottom surface of the container 2 through a plurality of buffles 7. The cylindrical member 6 may be made of a net composed of a material other than a metal or a punched plate having a large number of small holes formed thereto by punching. Further, the up and down width of the cylindrical member 6 is set so as to be larger than that of each flat plate blade 5b and the interval between the inner diameter side of the cylindrical member and the leading end of each flat plate blade 5b is set to a degree preventing the contact of both of them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stirrer suitable for reducing the size of suspended particles in a slurry liquid or a liquid containing a large amount of air bubbles in the chemical industry, the food industry, and the like.

[0002]

2. Description of the Related Art As a conventional stirring device, as shown in FIG. 9, a stirring shaft c having a slanting stirring blade b is provided in a lower portion of a container a, and a baffle d is provided on an inner side wall of the container a. Things are known.

[0003]

In a liquid in which fat, air bubbles, etc. are suspended, it is necessary to reduce the particle size of these suspended particles, but conventional shearing devices cannot provide sufficient shearing action. Also, there was a problem that the power loss was large.

An object of the present invention is to solve these problems and to provide a stirring device having a high shearing / breaking action on suspended particles.

[0005]

In order to achieve the above object, the present invention provides a cylindrical body having a large number of holes surrounding the outer circumference of the stirring blade, or the outer circumference of the stirring blade is set near the stirring blade. It is characterized in that a plurality of baffles are surrounded and radially arranged in the vicinity of the outer periphery of the stirring blade.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a stirring device of the present invention will be described with reference to FIGS.

FIG. 1 is a vertical sectional view of a stirring device 1 of the present invention, and FIG. 2 is a detailed perspective view of a part of the stirring device 1.

A liquid 3 for stirring is contained in a container 2, and a stirring blade 5 is suspended from a driving device (not shown) via a stirring shaft 4.

The stirring blade 5 is a standard turbine type, and is formed by radially fixing a plurality of flat blades 5b to a disk 5a.

A cylindrical body 6 made of wire mesh surrounding the outer periphery of the stirring blade 5.
The cylindrical body 6 is locked to the bottom surface of the container 2 via a plurality of baffles 7.

The vertical width of the cylindrical body 6 is equal to the flat blade 5b.
Is formed so as to be longer than the vertical width thereof, and the space between the inner diameter side of the cylindrical body 6 and the tip of each flat plate blade 5b is arranged so as not to contact them.

Next, the operation of the first embodiment will be described.

When the liquid 3 to be stirred is put in the container 2 and the stirring blade 5 is rotated by the driving device, a flow as shown in A and B of FIG. 3 is generated in the liquid 3 above and below the stirring blade 5. .

These flows have a swirl component directed to the outside of the stirring blade 5 and in the same direction as the rotating direction of the stirring blade 5.

Therefore, the flows A and B of the liquid 3 flow into the cylindrical body 6
Suspended particles in the liquid 3 are cut off when passing through the holes of the wire mesh, and the flows A and B exiting the cylindrical body 6 are baffle 7
… Collides with 7 and is efficiently subdivided into finer particles.

Although the cylindrical body 6 is made of wire mesh here,
This may be a net made of a material other than metal, or may be made of a punch plate punched with a large number of small holes.

The sizes of these meshes and small holes may be freely selected according to the desired particle size.

The stirring blade 5 is a standard turbine in which a plurality of flat plate blades 5b are radially fixed to a disc 5a, but this is shown in FIG. It may be a curved type turbine in which is fixed, or as shown in FIG. 5, it may be a paddle type in which a large number of long flat blades 5e are radially arranged around a boss 5d.

Next, a second embodiment of the stirring device of the present invention will be described with reference to FIG.

FIG. 6 is a vertical sectional view of the stirring device 8 according to the second embodiment.

In this embodiment, except that a plurality of baffles 9 are arranged so as to be separated from the cylindrical body 6 so as to be in contact with the side wall inside the stirring container 2, and that the cylindrical body 6 is installed by a fixed stay 6a. Is the same as in the first embodiment.

The feature of the operation of the present embodiment is that the baffle 9
Are arranged at a distance from the cylindrical body 6, so that the swirling components of the flows A and B formed by the stirring blades 5 are
After passing through the small holes, the baffle reaches the vicinity of the inner wall of the stirring container 2 without colliding with the baffle.

Therefore, the stirring resistance with respect to the stirring blade 5 can be reduced, and the stirring performance superior to that of the first embodiment can be obtained depending on the property of the liquid 3 to be stirred.

Next, a third embodiment of the stirring device of the present invention will be described with reference to FIGS.

FIG. 7 is a partially detailed perspective view of the stirring device according to the third embodiment.

That is, the cylindrical body 6 is provided on the outer periphery of the stirring blade 5.
Instead, a large number of plate-shaped baffles 10 are radially arranged in the vicinity of the outer periphery of the stirring blade 5. In addition, these baffles 10 are locked to the bottom surface of the stirring container 2,
The distance between the inner circumference of each baffle 10 and the outer circumference of the flat plate blade 5b is so close that they do not come into contact with each other.

The operation of the present embodiment is that the flows A and B sent from the stirring blade 5 immediately collide with the baffle 10 at the place where the stirring blade 5 exits, and the suspended particles of the liquid 3 are strongly sheared.・ The destructive action is to work.

Depending on the nature of the liquid 3 to be stirred, this embodiment may be more suitable than the first and second embodiments using the cylindrical body 6.

Incidentally, FIG. 8 is a partially detailed perspective view of the third embodiment in which a wing-shaped curved plate baffle 11 is used instead of the flat plate-shaped baffle 10.

As described above, by forming the baffle into a blade-shaped curved plate, the flow resistance can be reduced, or the fluid velocity at the outlet of the baffle can be changed to change the flow state of the liquid 3 in the stirring container.

[0031]

As described above, according to the present invention, it is possible to provide a stirring device having a high shearing / breaking action on suspended particles.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a stirring device according to a first embodiment.

FIG. 2 is a partially detailed perspective view of the above.

FIG. 3 is a view showing a liquid flow of the above.

FIG. 4 is another example of a stirring blade.

FIG. 5 is another example of the same.

FIG. 6 is a vertical sectional view of a stirring device according to a second embodiment.

FIG. 7 is a partially detailed perspective view of a stirring device according to a third embodiment.

FIG. 8 is another example of the same.

[Explanation of symbols]

 1 Stirrer 2 Stirrer 5 Stirrer 6 Cylindrical 7,9,10,11 Baffle

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[Procedure amendment]

[Submission date] July 25, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Figure 9

[Correction method] Added

[Correction contents]

FIG. 9 is a cross-sectional view of an example of a conventional stirring device.

Claims (8)

[Claims] 1. A stirring device comprising a cylindrical body having a large number of holes surrounding the outer periphery of the stirring blade and installed in the vicinity of the stirring blade. 2. The stirrer according to claim 1, wherein the cylindrical body is made of wire mesh or a punch plate. 3. The stirrer according to claim 1, wherein a plurality of baffles are installed outside the cylindrical body. 4. The stirrer according to claim 3, wherein the baffle is a flat plate-shaped member which is in contact with the cylindrical body at one end surface thereof and is arranged radially outward. 5. The stirrer according to claim 3, wherein the baffle is arranged in contact with a side wall inside the stirring container with a distance from the cylindrical body. 6. A stirrer characterized in that a plurality of baffles are radially arranged in the vicinity of the outer circumference of the stirring blade so as to surround the outer circumference of the stirring blade. 7. The stirrer according to claim 6, wherein the baffle is a flat body. 8. The agitator according to claim 6, wherein the baffle is a blade-shaped curved plate.