JP3606925B2 - Blender - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a mixer used in the field of food, and relates to a mixer for mixing powder and liquid.
[0002]
[Prior 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 powder is charged. A mixer 36 having a liquid jet nozzle 35 is provided at the lower portion of the charging pipe 34, and a high speed mixer 37 is connected to the lower portion of the mixer 36. Inside the high-speed mixer 37, a propeller-like stirring blade 39 driven by a motor 38 is provided. In addition, the code | symbol 40 in a figure is an exit of the solution (the powder melt | dissolved).
[0003]
The powder charged in the hopper 31 is mixed with warm water supplied in the mixer 36 and stirred and mixed by the stirring blade 39 rotating at a high speed in the high-speed mixer 37 so that the powder dissolves in the liquid and becomes a solution. It is discharged from the solution outlet 40.
[0004]
Here, in the case of the prior art of FIG. 8, the mixer 37 is located at a position directly below the charging pipe 34 and the mixer 36. On the other hand, in the prior art of FIG. 9, the supply pipe 41 that supplies the mixture of the powder and liquid mixed by the mixer 36 to the high-speed mixer 37 is curved. 34 and the mixer 36 are arranged so as to be orthogonal to each other.
[0005]
[Problems to be solved by the invention]
In the apparatus in which the propeller-shaped stirring blade 39 is rotated at a high speed as described above and the powder is dissolved in the liquid, centrifugal force is generated more than necessary, so that the solution on the outer peripheral edge of the blade rises and the solution is pumped. Force acts. Then, air is entrained, and a phenomenon called “bubble chewing” occurs. When this “bubble chewing” occurs, the problem arises that the head to be transmitted from the blade does not sufficiently act on the liquid, and mixing of the powder and the liquid is not sufficiently performed. 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 becomes in a state as when the pump is shut off, and an excessive load is generated.
[0006]
On the other hand, if a solution pump is provided on the discharge side to extract the solution, overload can be prevented, but the discharge pressure due to the centrifugal force and the suction force of the solution pump are added, so that the solution is sufficiently contained in the mixer 37. Without staying, it is discharged immediately in a so-called “duck” state. That is, even if the mixer 37 has a sufficient stirring force, most of the stirring portion of the mixer 37 becomes a hollow and cannot be sufficiently stirred, and the amount of air entrained also increases and the quality is deteriorated. .
[0007]
Furthermore, in the prior art of FIG. 8, since the mixture of powder and liquid accumulates downward, there is a problem that the mixture leaks from the through portion of the rotating shaft. On the other hand, if the mixer 37 is arranged as shown in FIG. 9, leakage from around the rotation axis can be prevented, but there is a problem that the powder settles and stays at the lowermost portion 42 of the supply pipe 41. is there.
[0008]
The present invention has been proposed in view of the 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.
[0009]
[Means for Solving the Problems]
According to the present invention, in a mixer for mixing powder and liquid provided at the lower end (10a) of the supply passage (10) through which powder and liquid are supplied, the inside of the casing (21) is provided. Is provided with a circular rotating disk (23) driven by a driving means, and is arranged to be inclined with respect to the supply passage (10), and a solution outlet (27) is provided on the outer side in the circumferential direction of the casing (21). In addition, a plurality of projecting portions (26) for mixing and stirring the powder and liquid are erected on the surface of the rotating disk (23), and on the drive means side of the rotating disk (23) Arc-shaped ribs (24) are erected at an equal circumference and inclined rearward in the rotational direction.
[0010]
According to the present invention, the region where the rotating disc (23) and the protruding portion (26) are present during rotation driving is filled with powder and liquid.
[0013]
In carrying out the present invention, the rotor base of the rotating disk can be a simple flat plate shape, but the outer peripheral edge of the rotor base protrudes upward or the outer peripheral edge is recessed downward. Is preferred. And when it is set as the shape which protruded the outer peripheral edge part of the rotor base upwards, it is preferable to make the center part of a rotor base dent in bowl shape, dent in a mortar shape, or dent in a truncated cone shape. . Further, when the outer peripheral edge portion of the rotor base is recessed downward, it is preferable that the central portion protrudes in a conical shape, protrudes in a cylindrical shape, or protrudes in a bowl shape.
[0014]
Further, it is preferable that the protruding portion is constituted by a pin. Here, 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. Preferably, the pin is a conical pin having an elliptical cross section and a semicircular pin having a semicircular cross section. Furthermore, it is also preferable to form a recess or a hole on the side surface of the protruding portion so as to obtain a special stirring effect.
[0015]
Further, it is preferable that the protruding portions are erected on the surface of the rotating disk and a plurality of protruding portions are erected on the inner wall surface of the casing facing the rotating disk toward the rotating disk.
[0016]
[Action]
According to the mixer of the present invention having the above-described configuration, the generation of centrifugal force can be reduced as much as possible as compared with the propeller type. Here, in the conventional technology in which the rotating part is configured by a propeller or the like, centrifugal force is generated in the circumferential direction, and the solution at the outer peripheral edge is lifted, but in the present invention, generation of such centrifugal force is suppressed. The solution at the outer peripheral edge does not float up. Therefore, the air is prevented from being caught, and the “bubble biting” state does not occur.
[0017]
Further, in the present invention, by configuring the area where the rotating disk and the protruding portion are filled with powder and liquid, it is further better prevented that the protruding portion entraps air. The
[0018]
Here, it is also conceivable to use a stirring blade 39a as shown in FIG. However, when the powder 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 generate “bubble chewing”. Therefore, in the practice of the present invention, the shape like the stirring blade 39a is not often used.
[0019]
In the present invention, when the rotating disk is driven to rotate by the driving means, the plurality of projecting portions standing on the rotating disk also rotate around the center of the rotating disk as the rotation axis. Even if the powder forms a lump (so-called “dama”) in the liquid, the rotating protrusion collides with the “dama” and crushes the “dama” so that the powder and liquid are evenly distributed. And it is mixed and stirred efficiently. More specifically, the powder and liquid in the forward direction (rotating direction) of the protruding portion are pushed apart by the protruding portion, while the powder and liquid behind the protruding portion of the protruding portion have passed through the protruding portion. It is considered that the mixture is violently mixed by the suction force generated for a moment later.
[0020]
In addition to this, if a “pin mill” -like structure is adopted, the shearing force that breaks up the “dama” of the powder and the stirring force that uniformly mixes the powder with the liquid are greatly improved. At the same time, by adopting a “pin mill” structure, the centrifugal force is generated in the circumferential direction, the solution at the outer peripheral edge is lifted, the air is entrained by the rise of the solution at the outer peripheral edge, "Is reliably prevented from occurring.
[0021]
Furthermore, as a result of various studies, the inventors have found that the extension line of the center line of the supply passage matches the center line of the rotating disk, as compared with the case where the extension line and the center line are eccentric, It has been 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 in such a manner, mixing and stirring efficiency is improved, and inconveniences such as poor suction are prevented.
[0022]
That is, according to the mixer of the present invention, the generation of the centrifugal force in the circumferential direction by the protruding portion is suppressed, the lifting of the solution at the outer peripheral edge is suppressed, and the shearing force and the stirring force are increased. Further, since the supply passage is connected perpendicularly to the center of the rotating disk, it is possible to prevent the liquid from flowing backward to the supply passage due to the centrifugal force in the circumferential direction.
[0023]
In addition to this, if the mixer of the present invention is inclined with respect to the supply passage, the mixture of powder and liquid is always near the rotating shaft of the stirring blade as in the case of the prior art of FIG. There is no accumulation in. Since the mixer according to the present invention does not have a positional relationship orthogonal to the supply passage, the powder settles and stays in the lowermost portion of the supply pipe as in the prior art of FIG. Is also prevented.
[0024]
In the present invention, the outer peripheral edge of the rotor base 23 (flat rotor base) of the rotating disk shown in FIG. 11 is projected upward, and the central portion is bowl-shaped (FIG. 12) and mortar-shaped (FIG. 13). , When recessed into the frustoconical shape (FIG. 14), the volume is reduced by the amount indicated by reference numeral 23E in FIG. 12-14 as compared to the part indicated by reference numeral 23a in FIG. The amount of powder and liquid staying space is reduced by that amount. And the direction of the force which acts on the liquid of the part shown by the code | symbol 23a is converted into the direction which goes to a center part direction from an outer peripheral part direction, as shown by arrow t. As a result, the powder and liquid toward the outer peripheral edge return to the central portion, and a space in the vicinity of the rotating shaft due to centrifugal force is less likely to occur.
[0025]
On the other hand, the outer peripheral edge portion of the rotor base 23 is recessed downward, and the central portion protrudes in a conical shape (FIG. 15), protrudes in a cylindrical shape (FIG. 16), or protrudes in a bowl shape (see FIG. 17) In the case, the powder and liquid are prevented from moving in the direction of the outer peripheral edge of the rotor base. This is because the amount of powder and liquid that can be retained is increased by cutting off the portion indicated by the solid line in FIG. 11, so that if the centrifugal force is the same, in the case of a plate-shaped rotor base (FIG. 11). This is because the load of the centrifugal force is increased as compared with the above, and it is difficult to move the retained powder and liquid to the outer peripheral edge portions of the rotor bases 23f, 23g, and 23h.
[0026]
Further, the projecting portion standing on the rotating disk is constituted by a pin, and the pin has 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 cross A cylindrical pin with a circular surface shape, a spatula pin with a rectangular cross-sectional shape, a conical pin with an elliptical cross-sectional shape, a semicircular pin with a semi-circular cross-sectional shape, or a recess or hole on the side of the protruding portion It is advantageous because a special stirring effect can be obtained.
[0027]
Furthermore, if the protrusions are erected on the surface of the rotating disk and a plurality of protrusions are erected on the inner wall surface of the casing facing the rotating disk toward the rotating disk, liquid and powder are intensely applied to the non-rotating pins. Due to the collision, the shearing force for dividing the “dama” of the powder and the stirring force for uniformly mixing 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 periphery of the rotor base, and prevents a space from being generated at the center.
[0028]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0029]
In FIG.1 and FIG.2, the screw feeder which shows the whole by the code | symbol 2 is provided in the top part of the mount frame 1 horizontally. In the middle upper part of the casing 3 of the screw feeder 2, there is provided a powder inlet 4 for introducing powder such as dry milk powder, and a screw 6 driven by a motor 5 is accommodated inside. Yes. The one pitch portion 6 a at the tip of the screw 6 is configured to be separable, and a scraper 7 that is in contact with the inner periphery of the casing 3 is fixed to the portion 6 a.
[0030]
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 in the radial direction of the charging pipe 10. A liquid jet nozzle 11 is provided in a tangential direction below the casing of the charging pipe 10, and a lower end portion 10 a of the charging pipe 10 is gently bent toward the side facing the screw feeder 2 in the vertical plane, The auxiliary nozzle 12 is provided. And the mixer which shows the whole with the code | symbol 20 on the extension of an axis line is connected to the edge part of the lower end part 10a. That is, the lower end portion 10 a is connected to the mixer 20 vertically.
[0031]
3 to 7, a casing 21 of the mixer 20 is connected with a solution outlet 27 extending outward and downward in the circumferential direction, and a rotary disk or rotor base that is driven by a motor as a driving means inside. 23 is provided. On the side of the motor coupling 22 of the rotor base 23, three arc-shaped ribs 24 are erected in a circumferentially equidistant manner and inclined rearward in the rotational direction indicated by an arrow. Further, in the casing 21 of the rotor base 23, a cone-shaped boss portion 25 is erected at the center, and a plurality of protruding portions, that is, hexagonal pins 26 are erected in the remaining portion. The hexagonal pins 26 are radially arranged in a plurality of rows (12 rows in the illustrated example) and concentrically arranged in a plurality of rows (5 rows in the illustrated example).
[0032]
Further, the longitudinal cross-sectional shape of the rotor base of the rotating disk may be a flat plate shape shown in FIG. 11, but the central portion may be recessed in a bowl shape like the rotor base 23b shown in FIG. 12, as shown in FIG. The central portion may be recessed in a mortar shape like the rotor base 23c, or the central portion may be recessed in a frustoconical shape like the rotor base 23d shown in FIG.
[0033]
On the other hand, the outer peripheral edge of the rotor base is recessed downward, and the central portion protrudes in a conical shape like the rotor base 23f shown in FIG. 15, or the central portion is cylindrical like the rotor base 23g shown in FIG. Alternatively, the central portion may be protruded like a bowl like the rotor base 23h shown in FIG.
[0034]
The protruding portion is not limited to the hexagonal pin 26, but is a square pin 26a (see FIG. 18), a triangular pin 26b (see FIG. 19), a circular pin 26c (see FIG. 20), and a spatula pin 26d (see FIG. 21), a conical pin 26e (see FIG. 22), a semicircular pin 26f (see FIG. 23), etc., can be arbitrarily selected. Further, the arrangement of the protruding portions is not limited to a radial shape, and may be any shape such as a spiral shape or a random shape. Further, the rotor base 23 is not limited to the one having the boss portion 25 at the center, and is arbitrary such as a flat plate, a taper plate, a plate body provided with blades only in the center portion.
[0035]
Further, as shown in FIG. 24, a recess or hole is formed on the side surface of the circular pin 26g, or a recess or hole is formed on the side surface of the hexagonal pin 26h as shown in FIG. May be.
[0036]
Furthermore, as shown in FIG. 26, the pin 26 that is a protruding portion may be erected on the rotor base 23, and a plurality of stationary pins 26 s may be erected on the inner wall surface 21 </ b> U of the casing facing the rotor base 23. .
[0037]
Next, the operation will be described.
When mixing, powder is charged from the powder inlet 4, hot water of, for example, 60 ° C. is sprayed from the liquid spray nozzle 11, and the rotor base 23 is driven to rotate by the motor 22. The square pin 26 also rotates around the center of the rotor base 23 as a rotation axis. Even if the powder forms a “dama” in the liquid, the rotating hexagonal pin 26 collides with the “dama” and crushes the “dama”, so that the powder and the liquid are even and efficient. Mix and stir well. The powder in the forward direction (rotating direction) of the hexagonal pin 26 is pushed away by the hexagonal pin 26, while the powder and liquid behind the hexagonal pin 26 in the moving direction are After passing, it is sucked by the suction force generated for a moment and collided.
[0038]
Further, in the illustrated embodiment, a plurality of hexagonal pins 26 are erected on the rotor base 23, and the centrifugal force can be reduced as compared with a propeller-shaped one. As a result, the outer peripheral edge portion of the rotor base 23 does not rise above the water surface. In addition to this, since it has a “pin mill” structure, the shearing force for dividing the “dama” and the stirring force for uniformly mixing the powder and the liquid are greatly improved.
[0039]
In the illustrated embodiment, the region where the rotor base 23 and the hexagonal pin 26 exist is configured to be filled with powder and liquid, and the hexagonal pin 26 entrains air. There is no.
[0040]
Further, 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. In comparison, the efficiency of mixing and stirring is improved, and the rate of occurrence of inconveniences such as poor suction is low.
[0041]
【The invention's effect】
Since the present invention is configured as described above, since the centrifugal force in the circumferential direction is suppressed, the solution at the outer peripheral edge of the stirring blade does not float up, and the solution at the outer peripheral edge of the blade does not float up. It is possible to reliably prevent air from being involved and occurrence of “bubble biting”.
[0042]
In addition to this, even if the powder forms a lump (so-called “dama”) in the liquid, the rotating protrusion collides with the “dama” and crushes the “dama”. Are mixed and stirred uniformly and efficiently.
[0043]
Furthermore, if the mixer according to the present invention is arranged to be inclined with respect to the supply passage, the mixture will not accumulate near the rotating shaft of the stirring blade, and the powder will settle in the lowermost part of the supply pipe. It is also prevented that it stays.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 3 is a side view showing the periphery of a rotor base.
4 is a view taken in the direction of arrow B in FIG. 3;
FIG. 5 is a view taken in the direction of arrow C in FIG. 3;
FIG. 6 is a side view of a hexagonal pin.
7 is a front view of FIG. 6. FIG.
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 longitudinal cross-sectional shape of a rotor base.
FIG. 11 is a plan view showing an example of a longitudinal cross-sectional shape of a rotor base.
FIG. 12 is a plan view showing an example of a longitudinal cross-sectional shape of a rotor base.
FIG. 13 is a plan view showing an example of a longitudinal sectional shape of a rotor base.
FIG. 14 is a plan view showing an example of a longitudinal cross-sectional shape of a rotor base.
FIG. 15 is a plan view showing an example of a longitudinal cross-sectional shape of a rotor base.
FIG. 16 is a plan view illustrating an example of a longitudinal cross-sectional shape of a rotor base.
FIG. 17 is a plan view showing an example of a longitudinal cross-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]
DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Screw feeder 3 ... Casing 4 ... Powder inlet 5 ... Motor 6 ... Screw 6a ... 1 pitch part 7 ... Scraper 10, 34. ..Input pipes 11 and 35... Liquid injection nozzles 12... Auxiliary nozzles 20 and 36... Mixer 21 .. casing 22. , 23g, 23h ... rotor base 23E ... outer peripheral edge 24 of rotor base ... rib 25 ... boss 26, 26a, 26b, 26c, 26d, 26e, 26f, 26g, 26h, 26s .... Pins 27, 40 ... Solution outlet 31 ... Hopper 32 ... Shutter 37 ... High-speed mixer 38 ... Motor 39, 39a ... Stirrer blade

Claims (2)

In a mixer for mixing powder and liquid, provided at the lower end (10a) of a supply passage (10) through which powder and liquid are supplied, the casing (21) is driven by driving means. A circular turntable (23) is provided, is inclined with respect to the supply passage (10), and the solution outlet (27) is connected to the outer side in the circumferential direction of the casing (21). On the surface of (23), a plurality of projecting portions (26) for mixing and stirring the powder and liquid are erected, and an arc-shaped rib is provided on the drive means side of the rotating disk (23). (24) is a mixer characterized in that it is erected with an equal circumference and inclined rearward in the rotational direction. The mixer according to claim 1, wherein a region where the rotating disc (23) and the protruding portion (26) are filled with powder and liquid when rotating.

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