JPH08168662A - Mixer - Google Patents

Abstract

PURPOSE: To provide a mixer for mixing and agitating powder with liquid evenly and efficiently by forming in upright protrusions for mixing and agitating on the furface of a rotating platen and rotating the rotating platen. CONSTITUTION: A solution outlet 27 extending below the outside in the circumferential direction is connected with a casing 25 of a mixer 20 and a rotating platen forming a rotor base 23 and driven by a motor as a driving means is provided inside. Arc-shaped ribs 24 are formed in upright and distributed evenly and inclined at the rear of the rotating direction on the side of a motor coupling 22 of the rotor base 23. A conical boss section 25 is disposed in upright at the center in the casing 21 of the rotor base 23, while a plurality of protruding sections forming hexagonal sections 26 are disposed in upright on the remaining sections. Thus, the occurrence of centrifugal force in the peripheral direction is controlled, and solution in an outer peripheral edge section of an agitating element is not floated up to prevent securely the occurrence of entrapment of air. Provided lumps are formed by powder in the liquid, powder is mixed and agitated evenly and efficiently with liquid, as the rotating protruding sections are crushed.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art First, an example of a conventional mixer will be described with reference to FIGS. In the embodiment shown in FIG. 8, a vertical charging pipe 34 is connected to the lower part of the hopper 31 into which the powder is charged. A mixer 36 having a liquid injection nozzle 35 is provided below the charging pipe 34, and a high-speed mixer 37 is connected to the bottom of the mixer 36. Inside the high speed mixer 37, a propeller-shaped stirring blade 39 driven by a motor 38 is provided. In addition,
Reference numeral 40 in the figure is an outlet of the solution (in which the powder is dissolved).

The powder put in the hopper 31 is mixed in the mixer 3
6 is mixed with the hot water supplied in 6, and the high speed mixer 37
The powder is dissolved in the liquid by being stirred and mixed by the stirring blade 39 rotating at high speed, and is discharged as a solution from the solution outlet 40.

In the case of the prior art shown in FIG. 8, the mixer 37 is located directly below the charging pipe 34 and the mixer 36. On the other hand, in the conventional technique of FIG. 9, since the supply pipe 41 that supplies the mixture of the powder and the liquid mixed by the mixer 36 to the high-speed mixer 37 is curved, the high-speed mixer 37 includes the charging pipe. 34 and the mixer 36 are arranged so as to be orthogonal to each other.

[0005]

In the apparatus for dissolving the powder in the liquid by rotating the propeller-shaped stirring blade 39 at a high speed as described above, centrifugal force is generated more than necessary, so that the outer peripheral portion of the blade is As the solution floats, a force for pumping the solution acts. Then, the air was caught and "bubble trapping"
The phenomenon called is generated. When this "bubble trapping" occurs, there arises a problem that the head to be transmitted from the blade does not sufficiently act on the liquid and the powder and the liquid are not sufficiently mixed. If the solution outlet 40 of the mixer 37 is narrowed in order to reduce the discharge amount of the solution for the purpose of preventing this, the mixer 37 will be in a state like when the pump is shut off and an excessive load will be generated.

On the other hand, if a solution sending pump is provided on the discharge side to withdraw the solution, overload can be prevented, but the discharge pressure due to the centrifugal force and the suction force of the solution sending pump are added, and the solution is stored in the mixer 37. It does not stay sufficiently, and is immediately discharged in a so-called “dummy” state. That is, even if the mixer 37 has a sufficient stirring force, not only is the stirring portion of the mixer 37 largely hollow and sufficient stirring cannot be performed, but also the amount of air entrained increases and the quality deteriorates. .

Further, in the prior art of FIG. 8, since the mixture of the powder and the liquid accumulates below, there is a problem that the mixture leaks from the penetrating portion of the rotary shaft. On the other hand, if the mixer 37 is arranged as shown in FIG. 9, leakage around the rotation axis can be prevented, but there is a problem that powder is deposited and stays in the lowermost portion 42 of the supply pipe 41. is there.

The present invention has been proposed in view of various problems of the prior art as described above, and an object thereof is to provide a mixer capable of uniformly and efficiently mixing and stirring powder and liquid. There is.

[0009]

A mixer of the present invention is a mixer for mixing powder and liquid, which is a circular rotary disk and a powder and liquid standing on the surface of the rotary disk. Mixed
It is provided with a plurality of protruding portions for stirring and a drive means for rotationally driving the turntable.

Further, the mixer of the present invention is provided with a supply passage through which powder and liquid are supplied, and the region where the rotary disk and the protruding portion are present is filled with the powder and liquid during rotational driving. Is characterized by.

Further, the mixer of the present invention is characterized in that the extension line of the center line of the supply passage through which the powder and the liquid are supplied coincides with the center line of the rotary disk. For example, when the supply passage is curved, the center line is also curved, but the extension line of the curved center line coincides with the center line of the rotating disk.

In addition to this, the mixer of the present invention is arranged so as to be inclined with respect to the supply passage.

In the practice of the present invention, the rotor base of the rotary disk may be formed in a simple flat plate shape, but the outer peripheral edge portion thereof may be projected upward or the outer peripheral edge portion may be recessed downward. It is preferable that When the outer peripheral edge portion of the rotor base is projected upward, it is preferable that the central portion of the rotor base is recessed in a bowl shape, a mortar shape, or a truncated cone shape. . When the outer peripheral edge portion of the rotor base is recessed downward, it is preferable that the central portion is projected in a conical shape, a cylindrical shape, or a bowl shape.

Further, it is preferable that the protruding portion is composed of a pin. The pin is a hexagonal pin having a hexagonal cross section, a square pin having a square cross section, a triangular pin having a triangular cross section, a cylindrical pin having a circular cross section, and a spatula having a rectangular cross section. It is preferable to use a circular pin, a conical pin having an elliptical cross section, or a semicircular pin having a semicircular cross section. Further, it is also preferable to form a concave portion or a hole on the side surface of the protruding portion so as to obtain a special stirring effect.

Further, it is preferable that the protruding portion is provided upright on the surface of the rotating disk and that a plurality of protruding portions are provided upright on the inner wall surface of the casing facing the rotating disk toward the rotating disk.

[0016]

According to the mixer of the present invention having the above-mentioned structure, it is possible to reduce the generation of centrifugal force as much as possible as compared with the mixer of the propeller type. Here, in the prior art in which the rotating portion is configured by a propeller or the like, centrifugal force is generated in the circumferential direction and the solution at the outer peripheral edge part floats up, but in the present invention, the generation of such centrifugal force is suppressed. The solution at the outer peripheral edge does not float up. Therefore, air is prevented from being trapped and the "bubble trapping" state does not occur.

Further, in the present invention, it is more preferable that the projection portion entraps air by configuring the rotary disk and the area where the projection portion is present to be filled with powder and liquid. To be prevented.

Here, the stirring blade 39a as shown in FIG.
It is also possible to use. However, when the powder liquid solution is stirred by the stirring blade 39a having such a shape, the force for feeding the solution to the downstream side is too strong, and a large amount of air may be entrained to cause "bubble bite". Therefore, the shape of the stirring blade 39a is rarely used in the practice of the present invention.

In the present invention, when the rotary disk is rotationally driven by the drive means, the plurality of protrusions provided upright on the rotary disk also rotate about the center of the rotary disk as the rotation axis. Even if the powder forms a lump (so-called “dama”) in the liquid, the rotating projection part collides with the “dama” and crushes the “dama”, so that the powder and the liquid are evenly distributed. In addition, it is efficiently mixed and stirred. More specifically, the powder and liquid in front of the traveling direction (rotational direction) of the protrusion are pushed by the protrusion, while the powder and liquid behind the protrusion in the traveling direction pass through the protrusion. It is considered that the mixture is violently mixed due to the suction force generated for a moment later.

In addition to this, if a "pin mill" -like structure is adopted, the shearing force that divides the "damage" of the powder and the stirring force that uniformly mixes the powder with the liquid are greatly provided. improves. At the same time, by adopting a "pin mill" structure, centrifugal force is generated in the circumferential direction, the solution at the outer peripheral edge floats up, air is trapped due to the floating up of the solution at the outer peripheral edge, and "bubble trapping" The occurrence of the condition is reliably prevented.

Further, as a result of various studies by the inventors, in the case where the extension line of the center line of the supply passage coincides with the center line of the rotating disk, the comparison is made when the extension line and the center line are eccentric. It was then found that the efficiency of mixing / stirring is improved and the rate of occurrence of inconvenience such as poor suction is reduced. Even when the present invention is configured as such, the mixing / stirring efficiency is improved, and inconveniences such as poor suction are prevented.

That is, according to the mixer of the present invention, the generation of centrifugal force in the circumferential direction due to the protruding portion is suppressed, the floating of the solution at the outer peripheral edge portion is suppressed, and the shearing force and the stirring force are increased. Further, since the supply passage is connected vertically to the center of the rotating disk, it is possible to prevent the liquid from flowing back to the supply passage side due to the centrifugal force in the circumferential direction.

In addition to this, if the mixer of the present invention is arranged so as to be inclined with respect to the supply passage, the mixture of the powder and the liquid is constantly mixed in the stirring blade as in the case of the prior art of FIG. It does not accumulate near the rotation axis. Since the mixer of the present invention does not have a positional relationship orthogonal to the supply passage, the powder is precipitated and accumulated in the lowermost portion of the supply pipe as in the prior art of FIG. It is also prevented.

In the present invention, the outer peripheral edge portion of the rotor base 23 (plate-shaped rotor base) of the rotary disk shown in FIG. 11 is made to project upward, and the central portion is bowl-shaped (see FIG. 1).
2), a mortar shape (FIG. 13) and a frustoconical shape (FIG. 14) are recessed, compared with a portion 23a in FIG. 11 and a portion 23E in FIG. The volume is reduced by that amount, and the powder and liquid retention space is reduced accordingly. Then, the direction of the force acting on the liquid in the portion indicated by the reference numeral 23a is converted from the direction of the outer peripheral edge portion toward the direction of the central portion as indicated by the arrow t. As a result, the powder and liquid heading to the outer peripheral edge portion return to the central portion, and it becomes difficult for a space in the vicinity of the rotation axis to be generated by the centrifugal force.

On the other hand, the outer peripheral edge portion of the rotor base 23 is formed in a recessed shape so that the central portion is projected in a conical shape (FIG. 15), in a cylindrical shape (FIG. 16), or in a bowl shape. In the case of FIG. 17 (FIG. 17), the powder and liquid are prevented from moving toward the outer peripheral edge of the rotor base. this is,
Since the amount of powder and liquid that can stay is increased by cutting out the portion indicated by the solid line in FIG. 11, if the centrifugal force is the same, as compared with the case of a flat plate-shaped rotor base (FIG. 11). It is considered that the load of the centrifugal force increases and it becomes difficult to move the retained powder and liquid to the outer peripheral edge portions of the rotor bases 23f, 23g, and 23h.

Further, the protruding portion erected on the rotating disk is constituted by a pin, and the pin has a hexagonal cross section, a square pin having a square cross section, and a triangular triangle having a cross section. Pin, cylindrical pin with a circular cross section, spatula pin with a rectangular cross section, conical pin with an elliptical cross section, semi-circular pin with a semi-circular cross section, or on the side of the protruding part Forming the recesses or holes is advantageous because a particular stirring effect can be obtained.

Further, if the protrusions are provided upright on the surface of the turntable and a plurality of protrusions are provided upright on the inner wall surface of the casing facing the turntable toward the turntable, the liquid and powder can be applied to the non-rotating pin. Since the bodies collide violently, the shearing force that divides the powder "dama" and the stirring force that uniformly mixes the powder with the liquid are further improved. At the same time, the presence of the non-rotating pin weakens the centrifugal force toward the outer peripheral edge of the rotor base, thereby preventing a space from being formed in the center.

[0028]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, a screw feeder, generally designated by 2, is provided horizontally on the top of the gantry 1. In the middle upper part of the casing 3 of the screw feeder 2, a powder charging port 4 for charging powder such as dry milk powder is provided, and a screw 6 driven by a motor 5 is housed therein. There is. The one pitch portion 6a at the tip of the screw 6 is configured to be separable,
A scraper 7 that is in contact with the inner circumference of the casing 3 is fixed to the portion 6a.

On the other hand, a supply passage indicated by reference numeral 10 as a whole connected to the casing 3, that is, a charging pipe is provided, and the casing 3 projects to the middle of the charging pipe 10 in the radial direction. A liquid injection nozzle 11 is provided in a tangential direction below the casing of the charging pipe 10, and a lower end portion 10a of the charging pipe 10 is gently bent toward a side facing the screw feeder 2 in a vertical plane, and the end portion thereof is provided. Is provided with an auxiliary nozzle 12. A mixer, generally designated by 20, is connected to the end of the lower end portion 10a on the extension of the axis. That is, the lower end portion 10a is the mixer 2
Connected vertically to 0.

Referring also to FIGS. 3 to 7, a casing 21 of the mixer 20 is connected to a solution outlet 27 extending downward in the circumferential direction, and a rotary disk driven internally by a motor serving as a drive means. That is, the rotor base 23 is provided. The motor coupling 22 of the rotor base 23
On the side, three arc-shaped ribs 24 are evenly arranged on the circumference, and
It is erected so as to be inclined rearward in the rotational direction indicated by the arrow. Further, a cone-shaped boss portion 25 is provided upright in the center of the casing 21 of the rotor base 23, and a plurality of protrusions, that is, hexagonal pins 26 are provided upright in the remaining portion.
The hexagonal pins 26 are radially arranged in a plurality of rows (in the illustrated example, 1
2 rows) and multiple rows concentrically (5 rows in the illustrated example)
Are located in

The rotor base of the rotary disk may have a flat plate shape as shown in FIG. 11, but the central portion may be recessed like a bowl like the rotor base 23b shown in FIG. The center portion may be recessed like a mortar like the rotor base 23c shown by 13, or the center portion may be recessed like a truncated cone like the rotor base 23d shown in FIG.

On the other hand, the outer peripheral edge portion of the rotor base is recessed downward so that the central portion has a conical projection like the rotor base 23f shown in FIG. 15 or the central portion like the rotor base 23g shown in FIG. Part can be made to project in a cylindrical shape,
A central portion may be projected like a bowl like a rotor base 23h shown by 7.

The protruding portion is not limited to the hexagonal pin 26, but the hexagonal pin 26a (see FIG. 18) and the hexagonal pin 2
6b (see FIG. 19), circular pin 26c (see FIG. 20),
The spatula pin 26d (see FIG. 21), the conical pin 26e (see FIG. 22), the semicircular pin 26f (see FIG. 23), etc. can be arbitrarily selected. Further, the arrangement of the protruding portions is not limited to the radial arrangement, but may be a spiral arrangement or a random arrangement. Further, the rotor base 23 is not limited to the one having the boss portion 25 at the center, but may be a flat plate, a taper plate, a plate body provided with blades only at the central portion, or the like.

Further, as shown in FIG. 24, a circular pin 26g
A concave portion or a hole may be formed on the side surface of the hexagonal pin 26h, or a concave portion or a hole may be formed on the side surface of the hexagonal pin 26h as shown in FIG.

Further, as shown in FIG. 26, the pins 26 which are projections are erected on the rotor base 23, and a plurality of stationary pins 26s are erected on the inner wall surface 23U of the casing facing the rotor base 23. May be.

Next, the operation will be described. At the time of mixing, the powder is charged from the powder charging port 4, and the liquid injection nozzle 1
When hot water of, for example, 60 ° C. is sprayed from 1 and the rotor base 23 is rotationally driven by the motor 22, a plurality of hexagonal pins 26 erected there also rotate around the center of the rotor base 23 as a rotation axis. And the powder "dama" in the liquid
Even when forming, the rotating hexagonal pin 26 collides with the “dama” and crushes the “dama”, so that the powder and the liquid are uniformly and efficiently mixed and stirred. Then, the powder in front of the advancing direction (rotational direction) of the hexagonal pin 26 is pushed by the hexagonal pin 26, while the powder and liquid in the advancing direction of the hexagonal pin 26 are separated by the hexagonal pin 26. After passing, it is sucked by the suction force generated for a moment and then collides and is mixed.

In the illustrated embodiment, the rotor base 2
A plurality of hexagonal pins 26 are erected on 3 to reduce the centrifugal force as compared with a propeller-shaped one. As a result, the outer peripheral edge of the rotor base 23 does not float above the water surface. In addition to this, because of the "pin mill" structure, the shearing force that divides the "dama" and the stirring force that uniformly mixes the powder and the liquid are greatly improved.

In the illustrated embodiment, the rotor base 2
The region where the trigonal pin and the hexagonal pin 26 exist is configured to be filled with the powder and the liquid, and the hexagonal pin 26 does not entrap air.

Furthermore, since the extension line of the center line of the charging pipe 10 coincides with the center line of the rotor base 23, the extension line of the center line of the charging pipe 10 and the center line of the rotor base 23 are eccentric. The efficiency of mixing / stirring is improved and the rate of occurrence of inconveniences such as poor suction is lower than that in the case of the presence.

[0041]

Since the present invention is configured as described above, the generation of the centrifugal force in the circumferential direction is suppressed, so that the solution at the outer peripheral edge portion of the stirring blade does not float up and the outer peripheral edge portion of the blade is prevented. It is possible to reliably prevent the air from being entrained by the floating of the solution and the occurrence of "bubble trapping".

In addition to this, even if the powder forms a lump (so-called “dama”) in the liquid, the rotating protrusion part is a “dama”.
Since the “dama” is crushed by colliding with, the powder and the liquid are uniformly and efficiently mixed and stirred.

Further, if the mixer of the present invention is arranged so as to be inclined with respect to the supply passage, the mixture will not be accumulated in the vicinity of the rotating shaft of the stirring blade, and the powder will be collected in the lowermost portion of the supply pipe. It is also prevented from precipitating and staying.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a view on arrow A in FIG.

FIG. 3 is a side view showing the periphery of a rotor base.

FIG. 4 is a view taken in the direction of arrow B in FIG. 3;

5 is a view on arrow C of FIG.

FIG. 6 is a side view of the hexagonal pin.

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a side view showing an example of a conventional mixer.

FIG. 9 is a side view showing another conventional technique.

FIG. 10 is a plan view showing an example of a vertical sectional shape of a rotor base.

FIG. 11 is a plan view showing an example of a vertical sectional shape of a rotor base.

FIG. 12 is a plan view showing an example of a vertical sectional shape of a rotor base.

FIG. 13 is a plan view showing an example of a vertical sectional shape of a rotor base.

FIG. 14 is a plan view showing an example of a vertical sectional shape of a rotor base.

FIG. 15 is a plan view showing an example of a vertical sectional shape of a rotor base.

FIG. 16 is a plan view showing an example of a vertical sectional shape of a rotor base.

FIG. 17 is a plan view showing an example of a vertical sectional shape of a rotor base.

FIG. 18 is a plan view showing an example of the shape of a pin.

FIG. 19 is a plan view showing an example of the shape of a pin.

FIG. 20 is a plan view showing an example of the shape of a pin.

FIG. 21 is a plan view showing an example of the shape of a pin.

FIG. 22 is a plan view showing an example of the shape of a pin.

FIG. 23 is a plan view showing an example of the shape of a pin.

FIG. 24 is a plan view showing an example of the shape of a pin.

FIG. 25 is a plan view showing an example of the shape of a pin.

FIG. 26 is a side sectional view showing another embodiment of the present invention.

[Explanation of symbols]

1 ... Stand 2 ... Screw feeder 3 ... Casing 4 ... Powder input port 5 ... Motor 6 ... Screw 6a ... 1 pitch part 7 ... Scraper 10, 34 ... ..Injection pipe 11, 35 ... Liquid injection nozzle 12 ... Auxiliary nozzle 20, 36 ... Mixer 21 ... Casing 22 ... Motor coupling 23, 23a, 23b, 23c, 23d, 23f , 23
g, 23h ... Rotor base 23E ... Outer peripheral edge portion of rotor base 24 ... Rib 25 ... Boss portion 26, 26a, 26b, 26c, 26d, 26e, 26
f, 26g, 26h, 26s ... Pins 27, 40 ... Solution outlet 31 ... Hopper 32 ... Shutter 37 ... High-speed mixer 38 ... Motor 39, 39a ... Agitation blade

Front page continued (72) Inventor Tsunemi Hayashi, 632, Higashishiji Engineering, Numazu City, Shizuoka Prefecture, Akatake Engineering Co., Ltd. Yasuhiro Watanabe 632, Higashishiji, Numazu, Shizuoka Prefecture Akatake Engineering Co., Ltd.

Claims (4)

[Claims] 1. A mixing machine for mixing powder and liquid, comprising a circular rotary disk and a plurality of protrusions standing on the surface of the rotary disk to mix and stir the powder and liquid. And a drive means for rotationally driving the turntable. 2. The mixture according to claim 1, wherein a supply passage for supplying powder and liquid is provided, and a region where the rotary disk and the protrusion portion are present is rotatably driven and is filled with powder and liquid. Machine. 3. The extension line of the center line of the supply passage through which the powder and the liquid are supplied coincides with the center line of the rotary disk.
2. The mixer according to any one of 2. 4. The mixer according to claim 1, wherein the mixer is arranged so as to be inclined with respect to a supply passage through which powder and liquid are supplied.