JP2020054955A - Stirring device - Google Patents

Abstract

To provide a stirring device that is configured to efficiently stir an object to be stirred put into a stirring tank and efficiently manufacture an object to be manufactured in a large capacity.SOLUTION: A stirring device 1 has a plurality of rotary blades that rotate around different concentric shaft centers, and comprises a stirring tank 2 into which an object to be stirred is put. One rotary shaft 3A is provided with a paddle blade 4, arranged in a posture inclined from a tip thereof toward a bottom part of the stirring tank 2, which stirs up the object to be stirred and a standing-up blade 4B that stands up along an inner wall of the stirring tank 2 in a posture inclining inward in a rotation direction, at an outer periphery side of the paddle blade 4. The other rotary shaft 3B is provided with a rotary blade 6 which is pivotally supported and rotates in proximity to the standing-up blade 4B so as to pass each other on inside of the standing-up blade 4B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stirrer that efficiently stirs a large amount of an object to be stirred into a stirring tank.

  Conventionally, a stirring device configured by combining a plurality of stirring blades is known. For example, the stirrer described in Patent Literature 1 has a concentric rotary drive shaft provided with a large incised flat blade, a frame-shaped blade, and an inclined paddle blade. The large notched flat wing and the inclined paddle wing are provided on one rotary drive shaft so as to be rotatable independently of the other rotary drive shaft. The frame-shaped wing is provided on the other rotary drive shaft. The frame type wing is arranged so as to surround the large flat wing (see Patent Document 1).

  A top frame portion extending in a radial direction perpendicular to the rotation axis direction, a bottom frame portion separated from the top frame portion in the rotation axis direction, and connected to both ends of the top frame portion; There is disclosed a stirrer provided with a pair of planetary rotating blades, each of which has a pair of side frame portions formed into a shape (90 degrees) twisted along a cylinder having a central axis (see Patent Document 2). ).

Japanese Patent No. 6170339 Japanese Patent No. 6118226

  2. Description of the Related Art In recent years, lithium ion secondary batteries have been used for many purposes, and the amount of use tends to increase. For example, in the field of transportation equipment such as automobiles, electric motorcycles, electric vehicles (hybrid, plug-in hybrid, electric vehicles, fuel vehicles, etc.) driven by electric energy such as nickel metal hydride or lithium ion from engine vehicles driven by fossil fuels such as gasoline Batteries). In particular, electric vehicles are equipped with a large number of lithium ion secondary batteries in order to increase the cruising distance when the battery is fully charged and to increase the output.

  However, when the active material paste applied to the current collector of the electrode layer of the lithium ion secondary battery is manufactured by the stirrer, the following inconvenience occurs in the conventional stirrer. The active material paste to be manufactured is manufactured by charging a powdered active material into a stirring tank and then charging a binder and a solvent at appropriate times with stirring. In the early stages of this production, the solids content is very high and difficult to disperse, placing a considerable load on the motor of the stirrer. Therefore, the input amount of the active material must be limited to less than half of the capacity of the stirring tank. Further, since the stirring tank in the planetary stirrer described in Patent Document 2 needs to be machined without irregularities while maintaining roundness, it is scaled up to a large capacity exceeding about 2000 L (liter). In this case, there is a problem that the mechanical processing cannot be performed, and thus, a stirrer having a large-capacity stirring tank cannot be manufactured.

  An object of the present invention is to provide a stirrer capable of efficiently stirring an object to be stirred and efficiently manufacturing the object to be manufactured in a large capacity.

  The present invention provides the following stirrer.

That is, the stirring device according to the embodiment of the present invention has the following configuration.
A stirrer having a plurality of rotating blades rotating around different concentric cores,
A stirring tank into which a stirring target is charged is provided,
The plurality of rotating blades are provided in an inclined posture from the tip of one of the rotating shafts toward the bottom of the stirring tank, and a paddle blade that lifts the stirring target,
Standing blades that stand along the inner wall of the stirring tank in an inclined position inward in the rotation direction on the outer peripheral side of the paddle blade,
A rotating wing that is supported by the other rotating shaft and rotates so as to pass close to the rising wing inside the rising wing,
It is characterized by having.

  According to this configuration, the object to be stirred put into the stirring tank is lifted upward from the bottom of the stirring tank by the paddle blade, and is stirred around the axis by the upright blade and the rotary blade. That is, the object to be stirred generates a vertical convection or a swirling flow without stagnation around the bottom and the axis of the stirring tank, whereby a sufficient flow is given in the tank and the stirring is uniformly performed. Further, when the standing blade and the rotating blade pass each other during the stirring, the object to be stirred that passes through the gap between the two blades undergoes shearing and is atomized. For example, when one upright wing is rotated forward and the other rotating wing is reversely rotated, the upright wing provided in an inclined posture inward in the forward rotation direction pushes the object to be stirred in the forward rotation direction on the inclined surface. While stirring, a part of the object to be stirred flowing inward along the inclined surface is backflowed. Further, when the standing wing and the rotating blade pass each other, the rotating blade pushes the stirring target in the reverse direction, and the stirring target flowing backward from the standing blade is drawn in the reverse direction.

  In other words, the stirring device of this configuration has an inner edge of the rising blade and an outer edge of the rotating blade as compared with a conventional stirring device in which the surfaces of both blades are flush with each other in the diameter direction of the stirring tank when the rising blade and the rotating blade pass each other. The object to be stirred easily flows into the gap formed by the flow, and the flow speed increases, so that the shearing force increases.

  In addition, with the improvement of the fluidity of the object to be stirred during shearing, the resistance applied to the upright wings and the rotary wings is reduced, which leads to a reduction in the load applied to the drive source of the rotary shaft. As a result, the stirrer with the above configuration can increase the effective capacity capable of stirring compared to the conventional apparatus when using a stirring tank having the same capacity as the conventional apparatus. Furthermore, it is possible to use a driving device such as a low-output motor with the reduction of the load on the driving source, and by using a large-capacity large-size stirring tank that cannot be realized with a conventional stirring device, Can also be stirred.

  Further, with the improvement of the fluidity of the stirring object passing through the gap between the two wings, generation of frictional heat during shearing is suppressed. Therefore, there is no need to increase the peripheral speed difference during rotation of the two wings, so that a target atomized uniform product can be produced in a short time with a relatively small peripheral speed difference.

  Further, according to this configuration, the object to be stirred is sheared by the cooperation of the upright blade and the rotary blade, so that the mechanical accuracy of the stirring tank is not required unlike the conventional device. That is, since the conventional stirring device shears the stirring target passing through the gap formed by the outer edge of the stirring blade and the inner wall of the stirring tank, the stirring tank is formed in a perfect circle so that the gap is always kept at a constant distance. It is necessary to process and machine so that there is no unevenness on the inner wall. However, according to this configuration, the object to be stirred is sheared by the cooperation of the upright blade and the rotary blade, so that it is not necessary to use a highly accurate stirring tank as in a conventional stirring device.

  In the above configuration, it is preferable that the rotary wing is configured to be rotatable around a central axis in a longitudinal direction.

  According to this configuration, the rotating blade is rotated in accordance with the stirring condition and fixed at a predetermined position, so that the gap formed by the rotating blade and the standing blade, the opening angle formed by the two blades, and the object to be stirred are reduced. The opening area on the introduction side can be appropriately adjusted.

  Further, in the above configuration, it is preferable that the upright wing is formed to have a tapered inner side in a cross section viewed from the rotation axis direction.

  According to this configuration, since the inside of the upright wing is sharp, the object to be stirred can be efficiently sheared.

  In the above configuration, in the cross section viewed from the rotation axis direction, the upright blade is formed so as to taper outward and outward, and the tapered tip is closely opposed to the inner wall of the stirring tank. It is preferable to configure as follows.

  According to this configuration, the stirring target that passes through the gap between the stirring tank and the upright blade during the stirring is sheared. In other words, the stirrer can efficiently stir the object to be stirred by the shearing of the object to be stirred by the cooperation of the standing blade and the rotating blade and the auxiliary shearing of the object to be stirred by the cooperation of the inner wall of the stirring tank and the standing blade. Can be sheared.

  In the above configuration, it is preferable that an inclined blade is provided coaxially with the paddle blade.

  According to this configuration, the inclined blade cooperates with the paddle blade to circulate the object to be stirred in the stirring tank in the vertical direction, and also contributes to the shearing of the object to be stirred passing through the center of the stirring tank. Therefore, this configuration can stir while stirring the object to be stirred more efficiently.

Further, in the above configuration, the rotor that rotates inside the standing wing is a portal-type rotor,
It is preferable that the inclined wing is configured to rotate within the portal rotor.

  According to the above configuration, the portal rotor can reduce the area for receiving the object to be agitated as compared with the large flat rotor during rotation, so that the load on the rotor can be reduced. . In addition, by providing the inclined wing inside the portal-shaped rotary wing, stagnation that is likely to occur around the rotation axis can be suppressed. Therefore, according to this configuration, the object to be stirred is more efficiently stirred.

Further, in the above configuration, the agitation tank comprises a cylindrical body and a tapered bottom.
It is preferable that the paddle blade is configured such that a bottom edge thereof is close to a bottom surface of the bottom portion.

  According to this configuration, the paddle blade pushes the stirring target object forward in the rotation direction, and passes the stirring target object through the gap between the bottom edge thereof and the bottom surface of the stirring tank. That is, when the object to be stirred passes through the gap, it is sheared by the bottom edge of the paddle blade. Therefore, the object to be stirred is more efficiently sheared and stirred.

  ADVANTAGE OF THE INVENTION According to the stirring apparatus of this invention, the stirring target object put into the stirring tank is efficiently stirred, and a manufacturing target object can be manufactured efficiently.

It is a longitudinal cross-sectional view which shows the external appearance and internal structure of the stirring device of this invention. It is a perspective view of a paddle wing. FIG. 2 is a cross-sectional view taken along line XX of FIG. 1. It is a figure which shows typically the change of the flow of the to-be-stirred object which passes between both wing | wings in the process of a wing | wing and a rotating wing passing each other. It is a figure which shows typically the change of the flow of the to-be-stirred object which passes between both wing | wings in the process of a wing | wing and a rotating wing passing each other. It is a figure which shows typically the change of the flow of the to-be-stirred object which passes between both wing | wings in the process of a wing | wing and a rotating wing passing each other. It is the elements on larger scale of FIG. FIG. 4 is a longitudinal sectional view of a conventional device on which a comparative simulation has been performed.

  Hereinafter, an embodiment of the stirring device of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the stirring device of the present embodiment, a description will be given of an example of a use of manufacturing an active material paste used for manufacturing a lithium ion secondary battery, but the present invention is not limited to the use. Therefore, the stirring device of the present embodiment can be used in other fields such as chemistry, medicine, electronics, ceramics, food, and feed.

  FIG. 1 is a longitudinal sectional view showing an external appearance and an internal structure of the stirring device according to the present embodiment.

  The stirring device 1 is provided with rotating blades 4 to 6 having different shapes on two rotating shafts 3 </ b> A and 3 </ b> B independently rotatable around a concentric shaft in a stirring tank 2.

  The stirring tank 2 includes a cylindrical body 2A and a bottom portion 2B tapered downward from a lower portion of the body 2A. A discharge port for discharging products and the like in the stirring tank 2 is formed at the tapered tip of the bottom 2B. A flow path 8 is connected to the discharge port via an on-off valve 7. In addition, a lid 2 </ b> C that seals the stirring tank 2 is provided above the stirring tank 2. In addition, the stirring tank 2 of this embodiment is a closed type.

  A bearing case 9 is provided above the stirring tank 2. A jacket 10 for circulating a coolant such as cooling water or a heating medium such as hot water is provided on the outer periphery of the stirring tank 2.

  The bearing case 9 transmits a rotational driving force from a driving device such as an externally mounted motor to each of the inner rotating shaft 3A and the outer rotating shaft 3B constituting the concentric rotating shaft 3 via a chain or the like. I do. Therefore, the bearing case 9 penetrates the lid 2C of the stirring tank 2, and exposes the passive part to the outside of the lid 2C while suspending and supporting the rotating shaft 3 toward the bottom 2B of the stirring tank 2.

  Each of the inner rotation shaft 3A and the outer rotation shaft 3B is independently driven via a bearing B. One inner rotation shaft 3A is provided with a paddle blade 4 and an inclined blade 5 in this order from the distal end toward the proximal end. The other outer rotating shaft 3B includes a portal-shaped rotating blade 6.

  The paddle blade 4 includes a pair of left and right annular frames formed in an annular shape. The annular frames 4A are connected at positions 180 degrees apart from each other around the inner rotation axis 3A. The paddle blade 4 has a substantially pentagonal outer shape when the front view of FIG. 1 is viewed, but the inner shape of the annular frame 4A is a hexagonal shape as shown in FIG. Further, the paddle blade 4 is connected to the distal end side of the inner rotation shaft 3A so as to be inclined obliquely upward. In this state, the paddle blades 4 are inclined with respect to the inner rotation axis 3A. The paddle blade 4 is formed by, for example, punching a metal plate, and the inner edge of the annular frame 4A is sharp.

  The lower frame extending along the bottom surface of the stirring tank 2 in the annular frame 4A is in a close state in which the lower frame is kept at a certain distance from the bottom surface. In addition, the outer frame that is bent at the connecting portion of the body 2A of the stirring tank 2 and extends along the vertical inner wall of the body 2A keeps the proximity state in parallel with the inner wall of the body 2A. That is, in order to extend the lower frame so as to be close to the bottom surface, the lower frame is twisted upward in the inclined direction in accordance with the curvature of the bottom surface. The twisted lower frame slightly bulges downward according to the curvature of the conical bottom 2B, and similarly, the outer frame inclined along the body 2A from the bottom 2B on the outer peripheral side also corresponds to the curvature of the body 2A. Slightly bulging.

  Therefore, when the paddle blade 4 rotates forward, the stirring object at the bottom 2B of the stirring tank 2 is scraped upward by the front surface of the annular frame 4A in the rotational direction, and the stirring object passing through the opening of the annular frame 4A is removed. Shear. That is, since the inner shape of the annular frame 4A is polygonal (in this embodiment, hexagonal), the stirring target is caught at the corners of the annular frame 4A, and the center of the opening and the inner wall of the paddle blade 4 As a result, a speed is easily generated in the flow velocity of the object to be stirred. The speed difference causes a shearing action of the agitation target.

  In addition, although the width W of the frame of the paddle blade 4 of this embodiment is set to be the same, the width W may be changed for each position of the annular frame. That is, the paddle blade 4 can change and adjust the scraping ability and the shearing ability of the stirring target object by appropriately setting and changing the width of the annular frame and adjusting the opening area. For example, when the opening area is reduced, the scraping ability increases, but the amount of the object to be stirred that passes through the opening decreases, and the shearing ability can be set low. If the opening area is widened, on the contrary, the scraping ability is reduced, but the amount of the stirring target to be passed through the opening is increased, so that the shearing ability can be set high.

  Further, the paddle blade 4 is not limited to the configuration of the annular frame 4A and may be a plate. The outer shape of the paddle blade 4 is not limited to a pentagon and may be polygonal. Alternatively, when the bottom 2B of the stirring tank 2 has a curved shape, the paddle blade 4 protrudes according to the curvature of the bottom 2B. Alternatively, the bottom surface may have a curved portion that maintains a close proximity of a certain distance. Further, the inner shape of the paddle blade 4 is different from the outer shape but may be the same.

  In addition, the paddle blade 4 is provided with an upright blade 4B that rises along the inner wall of the stirring tank 2 in a posture inclined inward in the rotational direction from the outer edge of the paddle blade. The upright wing 4 </ b> B is a triangular prism integrally joined to the paddle wing 4. As shown in FIGS. 2 and 3, in a cross section viewed from the direction of the rotating shaft 3, one tapered tip (inner edge) of the triangular prism passes an outer edge of the rotary wing 6 and the other tip, as described later. (Outer edge) faces the inner wall side of the stirring tank 2, and the other end faces rearward in the rotation direction.

  As shown in FIGS. 3 to 6, the upright wing 4 </ b> B crosses the inner edge of the upright wing 4 </ b> B and the imaginary line A extending outward from the outer edge of the rotary wing 6 in the process of passing the rotary wing 6. Is set to For example, when the upright wing 4B is rotating forward (R direction) and the rotating wing 6 is rotating backward (L direction), FIG. 5 shows the state before the upstanding wing 4B and the rotating wing 6 shown in FIG. 4 pass each other. By the time when they pass each other, the wings 4B and 6 relatively approach each other. When the two wings 4B and 6 shown in FIG. 5 pass each other, the inner edge of the standing wing 4B and the virtual line A of the rotary wing 6 start to intersect. Thereafter, as shown in FIG. 6, the two wings 4B and 6 move away from each other. In FIGS. 4 to 6, for the sake of simplicity, arrows indicate only the direction in which the object to be stirred flows in the gap between the two blades 4B and 6. There is also a flow of the stirring target that is pushed forward.

  Until the two wings 4B and 6 pass each other, the angle α between the front surface of the wing 4B and the surface of the rotary wing 6 on the normal rotation side of the wing 4B is set to change with time. In the present embodiment, the angle α in the state shown in FIG. 3 can be appropriately changed and set within a range of 0 to 180 degrees, and is preferably 60 to 140 degrees.

  Further, while the two wings 4B and 6 pass each other, the gap G between the inner edge of the upright wing 4B and the outer edge of the rotary wing 6 gradually narrows. That is, the gap G has a minimum width Gmin when the two wings 4B and 6 pass each other. Note that the minimum width Gmin is the inner diameter D1 of the stirring tank 2, the outer diameter D2 of the paddle blade 4, the width D3 of the upright blade 4B, the outer diameter D4 of the rotary blade 6, the width D5 of the rotary blade 6 shown in FIG. The setting is appropriately changed according to the scale of the gap D6 between the wing 2 and the upright wing 4B, the gap D7 between the upright wing 4B and the rotating wing 6, and the width D8 of the inclined wing 5. For example, each scale is D3 / D1 = 1/12 to 1/10, D3 = D5, D6 / D3 = 1/5 to 1/4, and D8 / D1 = 1 / 2.5 in relation to the scale. It is preferable to set the ratio such that 〜, D7 / D6 = 1/3 to １ ／.

  Therefore, when the upright wing 4B is rotated forward together with the paddle wing 4 and the rotary wing 6 is rotated in reverse, the upright wing 4B provided in an inclined position inward in the forward rotation direction allows the object to be stirred by the inclined surface. A part of the object to be stirred that flows inward along the inclined surface while being pushed out in the normal rotation direction (forward) is backflowed. The rotary blade 6 positively pushes the stirring target forward compared to the standing blade 4B.

  When the standing blade 4B and the rotating blade 6 pass each other, the rotating blade 6 pushes out the object to be stirred in the opposite direction of the standing blade 4B, and draws the object to be stirred to be passed backward from the standing blade 4B in the reverse direction. That is, the stirring target passing through the gap between the upright blade 4B and the rotary blade 6 moves from the wide gap between the two blades 4B and 6 as shown in FIG. 4 to the minimum width Gmin as shown in FIGS. The mutual pressing by both wings 4B and 6 increases according to the change. After a lapse of a predetermined period of time, the flow velocity of a part of the stirring target that is received rearward along the inclined surface of the upright blade 4B gradually increases and the two blades 4B and 6 pass each other after passing each other as shown in FIG. Due to the drawing action of the object to be stirred by 6, the flow velocity sharply increases. In other words, the acceleration of the stirring target increases.

  Next, the inclined blade 5 is installed at a predetermined height between the paddle blade 4 and the bearing case 9. That is, the inclined blade 5 is installed so as to rotate between the two blades of the portal-shaped rotary blade 6 in a state where the object to be stirred is immersed. Although the inclined blades 5 of the present embodiment include four flat blades at regular intervals around the rotation axis, the number of blades can be appropriately changed according to the scale or the object to be stirred. That is, the inclined blade 5 only needs to have a plurality of blades. Each wing is set in a direction opposite to the inclination direction of the paddle wing 4. Therefore, when the inner rotation shaft 3A is rotated forward, the paddle blades 4 scoop up the object to be stirred, while the inclined blades 5 push down the object to be stirred. Further, when the inner rotation shaft 3A is reversed, the stirring target pushed down to the bottom 2B of the stirring tank 2 by the paddle blade 4 moves along the bottom surface of the stirring tank 2 and then moves along the inner wall of the body 2A. While rising, the object to be stirred is pushed upward by the inclined blades 5. The inclined blade 5 has a function of shearing the object to be stirred around the rotation axis without depending on the rotation direction. In addition, the inclined blade 5 is not limited to the blade shape of the present embodiment, and may be, for example, a disper blade having a plurality of shear teeth on a disk-shaped outer periphery.

  As shown in FIG. 1, the portal rotor 6 is configured by a combination of two flat blades that are line-symmetric with respect to the axis P of the outer rotation shaft 3B. That is, each flat blade extends in the horizontal direction from the outer rotation shaft 3B and then bends vertically downward. When the stirring tank 2 is viewed in a plan view, as shown in FIG. 3, both blade surfaces of the rotary blade 6 are aligned so as to be along the same straight line having the diameter of the stirring tank 2. As shown in FIGS. 1 and 3, the rotary wing 6 is mounted on a bracket so as to be rotatable and fixable about a longitudinal central axis PY. Therefore, the angle α (opening angle) shown in FIG. 3 is appropriately set and changed in the range of 0 ° to 180 ° according to the stirring conditions, and the gap G formed by the upright wings 4B and the rotary wings 6 and the object to be stirred are set. The receiving opening area can be adjusted.

  Next, a comparative simulation of device characteristics in the case of producing an active material paste using the stirring device of the above-described embodiment in which the total volume of the stirring tank exceeds 2000 L and a conventional stirring device was performed.

  As shown in FIG. 8, a conventional device as described in Patent Literature 2 includes two rotating blades 22 and 23 that are independently rotated and driven by a bearing case 20 having a rotating drive shaft 21. Each of the rotating blades 22 and 23 is formed by twisting a blade having a triangular cross section into a rectangular shape and bending it around the axes P1 and P2 of the rotary drive shafts 24 and 25 by 90 degrees. Therefore, the rotating blades 22 and 23 rotate forward and backward with respect to each other while rotating (orbiting) around the axis P of the rotary drive shaft 21 of the bearing case 20. That is, in the process where each of the two blades 22 and 23 revolves around the rotary drive shaft 21 while rotating, the stirring object is sheared when the side edges of the two blades 22 and 23 pass each other. Further, the conventional apparatus is provided with two shearing dispers blades 26 which are independently driven by the bearing case 20. The dispersing blades 26 are configured to shear the object to be stirred while revolving around the rotary drive shaft 21 while rotating on their own, similarly to the rotating blades 22 and 23. Although not shown in FIG. 8, the other disperser blade 26 is arranged on the far side of the drawing across the rotary blades 22 and 23.

Details of the characteristics of each stirrer are provided in the table below.

  As described above, the total volumes of the stirring tanks of the conventional apparatus and the example apparatus were set to be substantially the same. The total capacity of the stirring tank of the conventional apparatus is 2016 L, and the total capacity of the stirring tank of the example apparatus is 2054 L. The capacity of the stirring tank is set to be approximately the same as that of the conventional apparatus, although it is slightly larger than that of the conventional apparatus. However, the body size of the embodiment apparatus is smaller than that of the conventional apparatus. More specifically, the apparatus of the embodiment has a total height of 3890 mm and a total width of 2424 mm, compared to a total height of 6873 mm and a total width of 3424 mm of the conventional apparatus, and is reduced in size to about 57% in total height and about 30% in total width. The motor and the speed reducer contribute to downsizing of the device of the present embodiment. That is, the motor output of each of the inner rotation shaft and the outer rotation shaft of the apparatus of this embodiment is half of the output of the motor of the conventional apparatus. By using a motor having a small output, the size of the bearing case can be reduced.

  In the conventional device, the peripheral speed of the low-speed side rotating shaft is 2.3 m / s, and the peripheral speed of the high-speed side rotating shaft is 23.9 m / s, and both shafts are relatively rotated in opposite directions. The peripheral speed difference at that time becomes 40 times or more. Even if both shafts are rotated in the same direction, the peripheral speed difference becomes 10 times or more. On the other hand, in the apparatus of the embodiment, the peripheral speed of the inner rotating shaft is 2.2 m / s, the peripheral speed of the outer rotating shaft is 5.1 m / s, and both shafts are relatively rotated in opposite directions. The circumferential difference at the time of this is about 10 times. Looking only at the peripheral speed difference, it seems that the shearing force of the embodiment apparatus is smaller, but the shearing force is higher than that of the conventional apparatus. That is, the apparatus according to the present embodiment is configured such that the interaction between the upright wing 4B and the rotary wing 6 causes the flow velocity to gradually increase in the course of the passing of the two wings 4B and 6, and that the rotary wing 4B and 6 move away from each other after passing each other. Due to the drawing action of the stirring object by 6, the flow velocity sharply increases, and the shearing force becomes higher than that of the conventional device. Further, since the peripheral speed difference is small in the example device, the generation of frictional heat is suppressed as compared with the conventional device.

  Furthermore, the capacity of the stirring target that can be put into the stirring tank of the example apparatus is 1400 L, and the amount of the stirring target that can be put into the conventional apparatus is 1000 L. Therefore, the example apparatus can increase the effective volume that can be stirred by 40% compared to the conventional apparatus. That is, if attention is paid only to the capacity of the stirring tank, the production efficiency can be increased by 40%.

  As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and various design changes can be made within the scope of the claims.

  (1) In the above-described embodiment, the rotary wing 6 has a gate shape, but may have a flat plate shape, a lattice shape, or an L-shape obtained by bending a triangular prism or a flat plate like the upright wing 4B. In this case, the inclined wing 5 provided on the same inner rotating shaft 3A as the paddle wing 4 is provided at a position not in contact with the rotating wing 6. For example, the inclined blade 5 is provided between the paddle blade 4 and the rotary blade 6. Alternatively, the inclined blade 5 is disposed above the paddle blade 4 and is immersed in the object to be stirred.

  Further, in the above-described embodiment, the paddle blade 4 is configured by the annular frame, but may be a plate-shaped blade that is twisted according to the bottom surface of the stirring tank 2 similarly to the annular frame.

  (2) In the above embodiment, the inclined blades 5 are provided on the same inner rotation shaft 3A as the paddle blades 4. However, a configuration without the inclined blades 5 may be employed.

  (3) In the above-described embodiment, the shape of the upright wing 4B is a triangular prism. However, the shape is not limited to the triangular prism. For example, the plate may be bent in an L-shape of an alphabet when viewed from the rotation axis side in a plan view. In this case, the surface on the short side of the L-shape may be opposed to the inner wall of the stirring tank 2 so that the inner edge on the tip side of the longer side and the outer edge of the rotary blade 6 may pass each other. According to this configuration, similarly to the above-described embodiment, the object to be stirred that passes through the gap between the two wings 4B and 6 can be efficiently sheared.

  (4) In each of the above-described embodiments, the paddle blade 4 and the rotary blade 6 rotate in the opposite directions during the stirring, but there is a difference between the peripheral speeds of the upright blade 4B and the rotary blade 6 provided on the paddle blade 4. Is generated, and the standing wing 4B and the rotary wing 6 may pass each other. For example, while rotating the upright wing 4B and the rotary wing 6 in the same direction, the rotation speed of one of the wings may be relatively slowed or increased. Alternatively, the rotation of either the upright wing 4B or the rotary wing 6 may be stopped, and only the other wing may be rotated.

DESCRIPTION OF SYMBOLS 1 Stirrer 2 Stirring tank 2A Body 2B Bottom 2C Lid 3 Rotating shaft 3A Inner rotating shaft 3B Outer rotating shaft 4 Paddle blade 4A Annular frame 4B Standing blade 5 Inclined blade 6 Gate type rotary blade 7 Open / close valve 8 Flow path 9 Bearing case 10 Jacket

That is, the stirring device according to the embodiment of the present invention has the following configuration.
A stirrer having a plurality of rotating blades rotating around different concentric cores,
A stirring tank into which a stirring target is charged is provided,
The plurality of rotating blades are provided in an inclined posture from the tip of one of the rotating shafts toward the bottom of the stirring tank, and a paddle blade that lifts the stirring target,
Standing wings having a flat surface while standing upright along the inner wall of the stirring tank in an inclined position facing inward in the rotation direction on the outer peripheral side of the paddle blades,
Is supported on the other rotary shaft, and a rotary blade having a plane of rotation inside said upright wings,
At least when the upright wing is rotated, the edge of the plane of the upright wing and the edge of the plane of the rotary wing are configured to be close to and pass each other .

Claims (5)

A stirrer having a plurality of rotating blades rotating around different concentric cores,
A stirring tank into which a stirring target is charged is provided,
The plurality of rotating blades are provided in an inclined posture from the tip of one of the rotating shafts toward the bottom of the stirring tank, and a paddle blade that lifts the stirring target,
Standing blades that stand along the inner wall of the stirring tank in an inclined position inward in the rotation direction on the outer peripheral side of the paddle blade,
A rotating wing that is supported by the other rotating shaft and rotates so as to pass close to the rising wing inside the rising wing,
A stirring device comprising: The stirrer according to claim 1, wherein the rotating blade is configured to be rotatable around a central axis in a longitudinal direction. The stirrer according to claim 1, further comprising an inclined blade coaxially with the paddle blade. The rotor that rotates inside the standing wing is a portal rotor,
The stirrer according to claim 3, wherein the inclined blade is configured to rotate in the portal-shaped rotary blade. The stirring tank is composed of a cylindrical body and a tapered bottom.
The stirrer according to any one of claims 1 to 4, wherein the paddle blade has a bottom edge close to a bottom surface of the bottom portion.