KR102106439B1 - Mixing device - Google Patents

Abstract

Provided is a stirring device that efficiently stirs the object to be stirred into the stirring tank and efficiently manufactures the object. As a stirring device (1) having a plurality of rotating blades that rotate around concentric different axial centers, there is provided a stirring tank (2) to which a stirring object is introduced. On one rotating shaft 3A, a paddle blade 4 that is installed in an inclined posture from the tip toward the bottom of the stirring tank 2 and scrapes the object to be stirred, and from the outer circumferential side of the paddle blade 4 It is provided with a standing wing (4B) standing up along the inner wall of the stirring tank (2) in an inclined posture toward the inside in the rotation direction. The other rotating shaft 3B is provided with a rotating blade 6 which is axially supported and rotates to be staggered in close proximity to the standing blade 4B from the inside of the standing blade 4B.

Description

Stirring device {MIXING DEVICE}

The present invention relates to a stirring device that stirs an object to be stirred into a stirring tank efficiently with a large capacity.

Conventionally, a stirring device configured by combining a plurality of stirring blades is known. For example, the stirring device described in Patent Document 1 is cut into a concentric rotary drive shaft, that is, a cut-in flat plate large blade, a frame blade and an inclined paddle It is equipped with (paddle) wings. The cut-in flat plate large blade and the inclined paddle blade are provided to be rotatable independently from the other rotation drive shaft on one rotation drive shaft. Further, the frame-shaped blade is provided on the other rotational drive shaft. The frame-shaped wings are arranged so as to enclose a large flat plate wing from the outside (see Patent Document 1).

In addition, a ceiling frame portion extending in a radial direction perpendicular to the rotation axis direction, a bottom frame portion spaced apart in the rotation axis direction with respect to the ceiling frame portion, and connected to both ends of the ceiling frame portion, the cylinder having a rotation axis as a central axis Accordingly, there has been disclosed a stirring device provided with a pair of planetary rotating blades comprising a pair of side frames having a twisted shape (90 °) (see Patent Document 2).

Japanese Patent No. 6170339 Japanese Patent No. 6118226

In recent years, lithium ion secondary batteries have been used for many applications, and usage tends to increase. For example, in the field of transportation equipment such as automobiles, electric motorcycles, electric vehicles (hybrids, plug-in hybrids, electric vehicles) driven by electric energy such as nickel hydrogen or lithium ions from engine vehicles driven by fossil fuels such as gasoline Automobiles, fuel cell vehicles). In particular, the electric vehicle is equipped with a large number of lithium ion secondary batteries in order to lengthen the cruising distance when the battery is fully charged and to achieve high output.

However, when the active material paste applied to the current collector of the electrode layer of the lithium ion secondary battery is produced by a stirring device, the following problems occur in a conventional stirring device. The active material paste, which is an object to be manufactured, is prepared by adding a powdered active material into a stirring tank, and a binder and a solvent are added in a timely manner while stirring. In the initial stage of this production, the solid content is very high, it has poor dispersion properties, and a heavy load is placed on the motor of the stirrer. Therefore, it is necessary to limit the input amount of the active material to less than half the capacity of the stirring tank. In addition, the agitation tank in the oil-type stirrer described in Patent Document 2 needs to be machined so as not to have irregularities while maintaining roundness, and thus when scaled up to a large capacity exceeding about 2000 L (liter) , There is a problem that it cannot be machined, and furthermore, a stirrer having a large-capacity stirring tank cannot be manufactured.

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

The present invention provides the following stirring device.

That is, the stirring device according to the embodiment of the present invention has the following configuration.

A stirring device having a plurality of rotating vanes rotating around concentric different axial centers,

Equipped with a stirring tank to be stirred object,

The plurality of rotary blades are provided in an inclined posture from the tip of one of the rotating shafts toward the bottom of the stirring tank, and the paddle blades scraping the stirring object,

A standing wing standing along the inner wall of the stirring tank in an inclined posture toward the inside in the rotational direction toward the outer circumferential side of the paddle wing,

A rotary blade which is supported by the rotation axis of the other side and rotates to be staggered and close to the standing wing from the inside of the standing wing

It characterized in that it comprises a.

According to this configuration, the stirring object input to the stirring tank is scraped upward from the bottom of the stirring tank by the paddle blade, and is stirred around the shaft by the standing blade and the rotating blade. In other words, the object to be stirred is not stirred around the bottom and the shaft of the stirring tank, but by generating convective flow or swirling flow, sufficient flow is given in the tank and stirred uniformly. In addition, when the standing blades and the rotating blades are staggered during stirring, the stirring object passing through the gaps of both wings receives a shear and is atomized. For example, when one standing wing is rotated forward and the other rotating wing is reversely rotated, the standing wing installed in an inclined posture in the inward direction of the forward rotation direction extrudes the stirring object from the inclined surface in the forward rotation direction ( While being discharged, a portion of the stirring object flowing in the inward direction along the inclined surface is received and flowed back. In addition, when the standing blades and the rotating blades are staggered, the rotating object extrudes the stirring object in the reverse rotation direction, and also draws the stirring object flowing back and forth from the standing wing in the reverse rotation direction.

That is, the stirring device of this configuration, compared to the conventional stirring device in which the planes of both wings are in a plane match in the radial direction of the stirring tank when the standing blades and the rotating blades are crossed, the inner edge of the standing blade and the outer edge of the rotating blade The object to be stirred flows into the gap formed by and becomes easy, and the flow rate is increased, thereby increasing the shear force.

In addition, as the fluidity of the stirring object during shearing is improved, the resistance of the standing blades and the rotating blades is reduced, leading to a reduction in the load applied to the drive source of the rotating shaft. As a result, the stirring device of the above-described configuration can increase the effective capacity of stirring than the conventional device when a stirring tank having the same capacity as the conventional device is used. In addition, it is possible to use a drive device such as a low-power motor according to the reduction in load to the drive source, and furthermore, it is also possible to agitate the object to be stirred using a large-sized large-sized stirring tank which is not feasible in a conventional stirring device.

In addition, with the improvement of the fluidity of the stirring object passing through the gaps of both wings, generation of frictional heat during shearing is suppressed. Therefore, since it is not necessary to increase the circumferential speed difference at the time of rotation of both wings, it is possible to manufacture a targeted uniformized product in a short time with a relatively small circumferential speed difference.

In addition, according to this configuration, since the stirring object is sheared by the cooperation of the standing blade and the rotating blade, mechanical precision of the stirring tank is unnecessary as in the conventional apparatus. That is, the conventional stirring device shears the stirring object passing through the gap formed by the outer edge of the stirring blade and the inner wall of the stirring vessel, so that the stirring tank is kept at a circle to maintain the gap at a constant distance. It is necessary to perform machining and to machine the inner wall so that there are no irregularities. However, according to this configuration, since the object to be stirred is sheared by the cooperation of the standing blade and the rotating blade, the use of the same high-precision stirring tank of the conventional stirring device is not required.

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

According to this configuration, by rotating the rotating blade according to the stirring conditions and fixing it at a predetermined position, the gap formed by the rotating blade and the standing blade, the opening angle formed by both blades, and the opening area on the side to introduce the stirring object Can be adjusted accordingly.

Moreover, in the said structure, it is preferable that the said standing wing is formed in the taper shape with an inner end narrow in the cross section seen from the direction of the said rotation axis.

According to this configuration, since the inside of the standing wing has a narrow end, it is possible to efficiently shear the object to be stirred.

In the above configuration, the standing wing is formed in a tapered shape with a narrow end in the outer direction in a cross section viewed from the rotational axis direction, and is configured such that the tip of the tapered shape faces the inner wall of the stirring tank in close proximity. It is desirable to do.

According to this configuration, the stirring object passing through the gap between the stirring tank and the standing wing during shearing is sheared. That is, the stirring device can shear the stirring object more efficiently by the shearing of the stirring object by the cooperation of the standing wing and the rotating blade and the auxiliary shearing of the stirring object by the cooperation of the inner wall of the stirring tank and the standing wing of the stirring tank.

And in the said structure, it is preferable to provide an inclined wing coaxially with the said paddle wing.

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

Moreover, in the said structure, the said rotary blade which rotates inside of the standing wing is a gate-shaped rotary blade,

It is preferable that the inclined blade is configured to rotate within the door-shaped rotating blade.

According to the said structure, since the area which receives an object to be stirred can be made small compared with a large-sized flat-type rotary blade at the time of rotation, the load on the rotating blade can be reduced. In addition, by providing an inclined blade inside the door-shaped rotary blade, it is possible to suppress residence that is likely to occur around the rotating shaft. Therefore, according to the said structure, an object to be stirred is stirred more efficiently.

In addition, in the above configuration, the stirring tank is composed of a cylindrical body portion and a narrow tapered bottom portion,

Preferably, the paddle wing is configured such that its bottom edge is close to the bottom surface of the bottom portion.

According to this configuration, the stirring object is passed through the gap between the bottom edge and the bottom surface of the stirring tank, while the paddle blade extrudes the stirring object forward in the rotational direction. 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 sheared and stirred more efficiently.

According to the stirring device of the present invention, the stirring object inputted to the stirring tank can be efficiently stirred, and the manufacturing object can be efficiently produced.

1 is a longitudinal sectional view showing the appearance and internal structure of the stirring device of the present invention.
2 is a perspective view of a paddle wing.
3 is a cross-sectional view taken along line VII-VII in FIG. 1.
4 is a view schematically showing a change in the flow of a stirring object passing between both wings in the process of standing wings and rotating blades being staggered.
5 is a view schematically showing a change in the flow of a stirring object passing between both wings in the process of standing wings and rotating blades being staggered.
6 is a view schematically showing a change in the flow of a stirring object passing between both wings in the process of a standing wing and a rotating wing being staggered.
7 is a partially enlarged view of FIG. 1.
8 is a longitudinal sectional view of a conventional device that has undergone comparative simulation.

Hereinafter, one 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, the use of an active material paste for use in the production of a lithium ion secondary battery will be described as an example, but is not limited to the above use. Therefore, the stirring device of this embodiment can also be used in other fields, such as chemistry, medicine, electronics, ceramics, food, and feed.

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

The stirring device 1 is provided with two rotating shafts 3A and 3B which are independently rotatable around a concentric shaft in the stirring tank 2, and rotor blades 4 to 6 of different shapes. .

The stirring tank 2 is composed of a cylindrical fuselage 2A and a bottom portion 2B formed in a tapered shape with a narrow end from the bottom of the fuselage 2A. A discharge port for discharging a product or the like in the stirring tank 2 is formed at the tapered tip of the bottom portion 2B. A flow path 8 is connected to the discharge port through an opening / closing valve 7. In addition, a cover portion 2C for sealing the stirring tank 2 is provided on the top of the stirring tank 2. In addition, the stirring tank 2 of this embodiment is sealed.

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

The bearing case 9 transmits rotational driving force from a driving device such as an externally installed motor to each of the inner rotational shaft 3A and the outer rotational shaft 3B constituting the concentric rotating shaft 3 through a chain or the like. do. Therefore, the bearing case 9 penetrates through the cover portion 2C of the stirring tank 2, while supporting the rotating shaft 3 toward the bottom portion 2B of the stirring tank 2 while being suspended. A passive portion is exposed outside of (2C).

Each of the inner rotating shaft 3A and the outer rotating shaft 3B is driven independently through the bearing B. One inner rotational shaft 3A is provided in the order of a paddle blade 4 and an inclined blade 5 from the tip toward the base end. The other outer rotary shaft 3B is provided with a door-shaped rotary blade 6.

The paddle wing 4 is composed of a pair of left and right annular frames formed in an annular shape. The annular frame 4A is connected to a position spaced 180 ° from each other around the inner rotational shaft 3A. The outer shape of the paddle wing 4 is approximately pentagonal when viewed from the front in FIG. 1, but the inner shape of the annular frame 4A is hexagonal, as shown in FIG. 2. In addition, the paddle blade 4 is connected to the front end side of the inner rotating shaft 3A so as to be inclined upward in the inclined direction. In this state, the paddle blade 4 is inclined with respect to the inner rotating shaft 3A. Then, the paddle blade 4 is formed, for example, by punching from a metal plate, and the inner edge of the annular frame 4A is sharp.

The lower frame, which is stretched along the bottom surface of the stirring tank 2 of the annular frame 4A, is in a close state maintaining a certain distance from the bottom surface. In addition, the outer frame, which is bent at the joint portion of the fuselage 2A of the stirring tank 2 and stretched along the vertical inner wall of the fuselage 2A, is in close proximity to the inner wall of the fuselage 2A. To maintain. That is, in order to draw the lower frame in close proximity to the bottom surface, the lower frame is twisted upward in the inclined direction in accordance with the curvature of the bottom surface. The torsionally processed lower frame is slightly expanded downward in accordance with the curvature of the conical bottom 2B, and similarly inclined along the fuselage 2A from the bottom 2B toward the outer circumference side. The outer frame is also slightly expanded according to the curvature of the body 2A.

Therefore, when the paddle blade 4 rotates forward, at the same time, the object to be stirred in the bottom portion 2B of the stirring tank 2 is scraped upward in the rotational direction by the front surface of the annular frame 4A, The stirring object passing through the opening of the annular frame 4A is sheared. That is, since the inner shape of the annular frame 4A is polygonal (in this embodiment, a hexagon), a jamming object is generated at each part of the annular frame 4A, and the center and paddle of the opening are formed. Around the inner wall of the wing 4, it is easy to generate a velocity at the flow rate of the object to be stirred. Due to the speed difference, a shearing action of the stirring target material occurs.

In addition, although the width W of the frame of the paddle blade 4 of this embodiment is set to be the same, you may change the width W for each position of the annular frame. That is, the paddle blade 4 can change and adjust the scraping ability and shearing ability of the stirring object by adjusting the opening area by appropriately changing the width of the annular frame. For example, when the opening area is made small, the scraping-up ability increases, but the amount of the stirring object passing through the opening decreases, and further, the shearing ability can be set low. When the opening area is increased, the scraping ability decreases in the opposite direction, but the amount of the agitating object passing through the opening increases, and further, the shearing ability can be set high.

In addition, the paddle blade 4 is not limited to the structure of the annular frame 4A, but may be a plate shape. In addition, the external shape of the paddle wing 4 is not limited to a pentagon, but may be a polygon, or when the bottom 2B of the stirring tank 2 is curved, according to the curvature of the bottom 2B. A shape having a curved portion that expands and maintains a close distance to the bottom surface may be sufficient. Further, the inner shape of the paddle wing 4 is different from the outer shape, but may be the same.

In addition, the paddle wing 4 is provided with a standing wing 4B standing along the inner wall of the stirring tank 2 in an inclined posture toward the inside in the rotational direction from the edge of the outer circumferential side. The standing wing 4B is a triangular prism integrally joined to the paddle wing 4. 2 and 3, in a cross-section viewed from the direction of the rotating shaft 3, one tip (inner edge) of a triangular columnar tapered shape, as will be described later, is the outer edge of the rotary blade 6 Staggered with, the other end (outer edge) faces the inner wall side of the stirring tank 2, and the other end is provided so as to face the rear of the rotating direction.

In addition, as shown in FIGS. 3 to 6, the standing wing 4B is in an outward direction from the inner edge of the standing wing 4B and the outer edge of the turning wing 6 in the process of staggering with the rotating wing 6. The stretched virtual line A is set to intersect. For example, when the standing wing 4B rotates forward (R direction), and when the rotating wing 6 reversely rotates (L direction), the standing wing 4B and the rotating wing 6 shown in FIG. From before the crossing to the crossing point shown in Fig. 5, both wings 4B and 6 are relatively close. At the time when both wings 4B and 6 shown in Fig. 5 are crossed, the inner edge of the standing wing 4B and the imaginary line A of the rotating wing 6 begin to intersect. Thereafter, as shown in Fig. 6, both wings 4B and 6 are spaced apart from each other. In addition, in FIG. 4 to FIG. 6, although it is easy to understand, it is shown with arrows only in the direction in which the stirring object flowing through the gaps of both wings 4B and 6 flows, but in reality, the standing wings 4B and the rotating wings ( There is also a flow chart of the stirring object extruded forward by each of 6).

Until the wings (4B) and (6) are staggered, the angle α between the front surface of the standing wing (4B) and the surface of the rotating wing (6) on the forward rotation side of the standing wing (4B) changes over time. It is set. 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 °, and is preferably 60 to 140 °.

Further, while the two wings 4B and 6 are staggered, the gap G between the inner edge of the standing wing 4B and the outer edge of the rotary wing 6 gradually narrows. That is, the gap G becomes the minimum width Gmin at the time when the wings 4B and 6 are alternated. In addition, the minimum width is the inner diameter d1 of the stirring tank 2 shown in FIG. 7, the outer diameter d2 of the paddle blade 4, the width D3 of the standing blade 4B, and the rotating blade 6 The outer diameter D4, the width D5 of the rotating blade 6, the gap D6 between the stirring layer 2 and the standing wing 4B, the gap D7 of the standing wing 4B and the rotating blade 6, and the width of the inclined blade 5 The setting is changed according to the scale of D8. For example, each scale is D3 / D1 = 1 / 12-1 / 10, D3 = D5, D6 / D3 = 1 / 5-1 / 4, D8 / D1 = 1 / 2.5 in correlation with the scale. It is preferable to set the ratio so that -1/2 and D7 / D6 = 1/3 to 1/2.

Accordingly, when the standing wing 4B is forwardly rotated together with the paddle wing 4, and when the rotating wing 6 is reversely rotated, the standing wing 4B installed in an inclined posture in the inner direction of the forward rotational direction is an inclined surface. While extruding the stirring object in the forward direction (front), a portion of the stirring object flowing in the inward direction along the inclined surface is received and flowed back. The rotary blade 6 actively extrudes the object to be stirred forward compared to the standing blade 4B.

In addition, when the standing wing 4B and the rotating wing 6 are staggered, the rotating wing 6 extrudes the object to be stirred in the reverse direction of the standing wing 4B, and also agitates to receive and flow backward from the standing wing 4B. The object is drawn in the reverse rotation direction. That is, the stirring object passing through the gap between the standing wing 4B and the rotating wing 6 is shown in FIGS. 3 and 5 from the state where the gap between both wings 4B and 6 is wide, as shown in FIG. As shown, the pressing of each other by both wings 4B and 6 increases with the change to the minimum width. The flow rate of a part of the agitating object which is passed backward along the inclined surface of the standing wing 4B is gradually increased, and as shown in FIG. 5, both wings 4B and 6 are spaced apart from each other after being staggered. After a predetermined time has elapsed, the flow rate is rapidly increased by the pulling action of the object to be stirred by the rotary vane 6. In other words, the acceleration of the stirring object is increased.

Next, the inclined blade 5 is provided at a predetermined height between the paddle blade 4 and the bearing case 9. That is, the inclined blade 5 is provided to rotate between two blades of the door-shaped rotating blade 6 in a state in which the stirring object is immersed. Although the inclined blade 5 of this embodiment is provided with four flat plate-shaped blades at equal intervals around the rotational shaft, the number can be appropriately set and changed depending on the scale or the object to be stirred. That is, the inclined wing 5 only needs to have a plurality of wings. Each wing is set in the opposite direction to the inclined direction of the paddle wing 4. Therefore, when the inner rotating shaft 3A is rotated forward, the paddle blade 4 scrapes the stirring object upwards, while the inclined blade 5 pushes the stirring object downwards. In addition, when the inner rotating shaft 3A was reversely rotated, the stirring object pressed down to the bottom 2B of the stirring tank 2 by the paddle blade 4 moved along the bottom surface of the stirring tank 2. Later, while rising along the inner wall of the fuselage 2A, the object to be stirred is pushed upward by the inclined blade 5. The inclined blade 5 has a function of shearing the stirring target around the rotating shaft without depending on the rotational direction. In addition, the inclined blade 5 is not limited to the blade shape of this embodiment, For example, the disc-shaped outer periphery may be a disper blade provided with a plurality of shear teeth.

As shown in Fig. 1, the door-shaped rotary blade 6 is constituted by a combination of two symmetrical flat blades with respect to the axial center P of the outer rotary shaft 3B. That is, each flat blade is bent vertically downward after being stretched in the horizontal direction from the outer rotation shaft 3B. In addition, when the stirring tank 2 is viewed from a plane, as shown in FIG. 3, both wing surfaces of the rotary blade 6 are aligned so as to follow the same straight line of the diameter of the stirring tank 2. Moreover, as shown in FIGS. 1 and 3, the rotary blade 6 is attached to a bracket so as to be rotatable and fixed about a central axis PY in the longitudinal direction. Accordingly, the angle α (opening angle) shown in FIG. 3 is appropriately changed according to the stirring conditions in a range of 0 ° to 180 °, and the gap G formed by the standing wings 4B and the rotating wings 6 is set. And the receiving opening area of the stirring object.

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

As shown in FIG. 8, the conventional apparatus as described in patent document 2 is provided with two rotating blades 22 and 23 which are driven to rotate independently in the bearing case 20 provided with the rotation drive shaft 21. As shown in FIG. Each of the rotating blades 22 and 23 is twisted at a 90 ° angle around the shaft centers P1 and P2 of the rotation drive shafts 24 and 25 again by bending the blade having a triangular cross section in a rectangular shape. Therefore, both rotation blades 22 and 23 rotate with each other by the respective shaft centers P1 and P2 while rotating (orbiting) around the shaft center P of the rotation drive shaft 21 of the bearing case 20. That is, in the process of revolving around the rotation drive shaft 21 while each of the two wings 22 and 23 rotates, it is configured to shear the stirring target when the side edges of the two wings 22 and 23 are staggered. In addition, the conventional device is provided with two dispersing blades 26 for shearing, which are independently driven in the bearing case 20. The disper blades 26 are configured to shear the object to be stirred while revolving around the rotation drive shaft 21 while each rotates as in the case of the rotating blades 22 and 23. In addition, although the other disper blade 26 is not shown in FIG. 8, it is arrange | positioned inside the ground which pinched the rotating blades 22 and 23. As shown in FIG.

The details of the characteristics of each stirring device are shown in the table below.

As described above, the total capacity of the stirring tanks of the conventional apparatus and the example apparatus was set to be approximately the same. The total capacity of the stirring tank of the conventional device is 2016L, and the total capacity of the stirring tank of the example device is 2054L. The capacity of the stirring tank is set to be approximately the same, although the example device is slightly larger than the conventional device. However, the body size of the example device is smaller than that of the conventional device. Specifically, for the total height of 6873 mm and the total width of 3424 mm of the conventional device, the example device is 3890 mm in total height and 2424 mm in total width, and is downsized to about 57% in total height and about 30% in total width. It is done. Motors and reducers contribute to miniaturization of the device of the present embodiment. That is, the output of the motor of both the inner rotational axis and the outer rotational axis of the device of this embodiment is half the output of the motor of the conventional device. By using a motor with a small output, the bearing case can be miniaturized.

Further, in the conventional device, the main speed of the rotating shaft on the low speed side is 2.3 m / s, and the main speed of the rotating shaft on the high speed side is 23.9 m / s, and the main speed difference when rotating both axes in the opposite direction is 40 times. That's it. Even if both axes are rotated in the same direction, the speed difference is more than 10 times. On the other hand, in the example device, the peripheral speed of the inner rotational axis is 2.2 m / s, the peripheral speed of the outer rotational axis is 5.1 m / s, and the difference in speed when the both axes are relatively reversed is about 10 times. Looking only at the main speed difference, the shear force of the example device is thought to be small, but the shear force is higher than that of the conventional device. That is, the device of the present embodiment, the flow rate (flow rate) is gradually increased in the process of the two wings (4B), (6), by the interaction of the standing wing (4B) and the rotating wing (6), and both wings ( When 4B) and (6) are separated from each other after being staggered, the flow rate increases rapidly due to the action of drawing the object to be stirred by the rotary blades 6, and the shearing force becomes more than that of the conventional device. Further, in the example device, since the peripheral speed difference is small, generation of frictional heat is suppressed compared to the conventional device.

In addition, the capacity of the stirring object that can be input to the stirring tank of the example device is 1400L, and the amount of the stirring object that can be input by the conventional device is 1000L. Thus, the example device can increase the effective capacity of stirring by 40% compared to the conventional device. That is, by focusing only on the capacity of the stirring tank, the production efficiency can be increased by 40%.

As described above, preferred embodiments of the present invention have been described, but the present invention is not limited to the above-described embodiments, and various design changes are possible as long as described in the claims.

(1) In the above-described embodiment, although the rotary blade 6 was a door shape, it may be a triangular prism or an L-shape which bends a flat plate similarly to the flat plate, lattice shape, and standing wing 4B. In this case, the inclined blade 5 provided on the inner rotational shaft 3A, such as the paddle blade 4, is installed at a position not in contact with the rotating blade 6. For example, the inclined blade 5 is provided between the paddle blade 4 and the rotating blade 6. Alternatively, the inclined blades 5 are arranged above the paddle blades 4 in a state of being immersed in the stirring object.

In addition, in the above-described embodiment, the paddle blade 4 is constituted by an annular frame, but like the annular frame, it may be a plate-shaped blade that has been twisted along the bottom surface of the stirring tank 2.

(2) In the above-described embodiment, although the inclined blade 5 is provided on the inner rotational shaft 3A like the paddle blade 4, the inclined blade 5 may not be provided.

(3) In the above-described embodiment, the shape of the standing wing 4B is a triangular prism, but is not limited to the shape described above, and may be a configuration in which the surface in the rotational direction is inclined toward the inside. For example, it may be a plate refracted in an L-shape of the alphabet when viewed in a plan view from the rotation axis side. In this case, the L-shaped short side side faces the inner wall of the stirring tank 2, and the inner edge on the distal end side of the long side and the outer edge of the rotary blade 6 are staggered. Just do it. According to this structure, the stirring object passing through the clearance gap between both wings 4B and 6 can be sheared efficiently like the said embodiment.

(4) In each of the above-described embodiments, the paddle blade 4 and the rotating blade 6 rotate in the reverse direction while stirring, but the standing wings 4B and the rotating blades 6 provided on the paddle blade 4 are Differences occur in both main speeds, and staggering occurs in the standing wings 4B and the rotating wings 6. For example, while rotating the standing wing 4B and the rotating wing 6 in the same direction, the rotational speed of any one wing may be made relatively slow or fast. Alternatively, rotation of either the standing wing 4B or the rotating wing 6 may be stopped, and only the other wing may be rotated.

1: stirring device
2: stirring tank
2A: fuselage
2B: bottom
2C: cover
3: rotating shaft
3A: inner rotation axis
3B: outer rotation axis
4: paddle wings
4A: annular frame
4B: standing wings
5: Inclined wings
6: Gate-shaped rotating wing
7: on-off valve
8: Euro
9: bearing case
10: jacket

Claims (7)

A mixing device comprising a plurality of rotating vanes rotating around concentric different axial centers,
It includes a stirring tank to be stirred object,
The plurality of rotary blades are provided in an inclined posture from the tip of one of the rotating shafts toward the bottom of the stirring tank, and paddle wings that scrape off the stirring object;
Standing upright along the inner wall of the stirring tank in an inclined position toward the inside in the rotational direction from the outer circumferential side of the paddle wing, and having a flat surface; And
A rotating blade axially supported by the other rotating shaft and having a plane rotating inside the standing blade;
Equipped with,
At least when the standing wing is rotated, the edge of the plane of the standing wing and the edge of the plane of the rotating wing are configured to be closely crossed,
Stirring device. According to claim 1,
The rotating blade is configured to be rotatable about a central axis in the longitudinal direction, the stirring device. According to claim 1,
A stirring device provided with an inclined blade coaxial with the paddle blade. According to claim 2,
A stirring device provided with an inclined wing coaxial with the paddle wing. According to claim 3,
The rotary blade rotating inside the standing wing is a door-shaped rotary blade,
The inclined blade is a stirring device configured to rotate within the door-shaped rotating blade. According to claim 4,
The rotary blade rotating inside the standing wing is a door-shaped rotary blade,
The inclined blade is a stirring device configured to rotate within the door-shaped rotating blade. The method according to any one of claims 1 to 6,
The stirring tank is composed of a cylindrical body portion and a narrow tapered bottom portion,
The paddle blade is a stirring device, configured to bring the bottom edge of the paddle wing closer to the bottom surface of the bottom portion.

Images