JP2019093347A - Stirring blade and stirrer - Google Patents

Abstract

To provide a stirring blade and a stirrer which can achieve advancement in dispersion and mixing.SOLUTION: A stirring blade A1 is fitted to a stirrer B1, is rotated around an axial direction z, and comprises a blade group 2 comprising plural blade parts 20 which are arranged in a rotation direction θ. The stirring blade further comprises plural plates 3, 4 which comprise a single metal plate material, respectively have a stem 31, which is located at a center in a radial direction r, and plural blade elements 32, 42, which are connected to the stem 31, and are laminated in an axial direction z. The blade part 20 has a blade surface for flowing a stirring object which is configured in such a manner that the blade elements 32, 42 of plural plates 3, 4, which are adjacent to each other in the axial direction z, contact or approach each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stirring blade and a stirring device.

  A stirring device having a stirring blade is used as a device for stirring a dispersion target, such as a liquid or a mixture of powder and liquid, and the like and dispersing and mixing. Patent Document 1 discloses an example of a conventional stirring blade and a stirring device. In the configuration disclosed in this document, a rotary blade is attached to the tip of the rotary shaft that is rotationally driven. The rotating blades are rotated in a container containing a target to be stirred to perform stirring such as dispersion and mixing of the target to be stirred.

  Here, stirring is a concept including dispersion and mixing. To disperse a target to be stirred is an operation in which another substance (for example, liquid or powder) is dispersed in a micro state in a substance (for example, liquid) that is chemically one phase. In addition, mixing the mixing targets is an operation of stirring in the container so that the mixing targets stored in the container have more uniform properties. In order to make the dispersion in the stirring device more sophisticated, it is important to concentrate the force of the stirring blade on only a part of the stirring target, and it often acts in a region existing in the immediate vicinity of the stirring blade. On the other hand, in order to further enhance the mixing in the stirring device, it is important that the force of the stirring blade be applied to the entire stirring object contained in the container to flow. As described above, enhancing dispersion and mixing with one stirring blade is required to have both contradictory behaviors compatible with each other. In particular, as the viscosity to be stirred becomes higher, it is more difficult to enhance dispersion and mixing.

  The stirring blade disclosed in Patent Document 1 is formed as having a base and a plurality of blades connected to the base by appropriately cutting and bending a plate material made of a single metal material. . In order to achieve higher agitation, it is necessary to set variously the shape, size, angle, etc. of the blade portion. However, the blade portion obtained by cutting and bending a plate material made of a single metal material is naturally limited in shape, size, angle and the like. In addition, if the blade is made larger or erected, there is a concern that the support of the blade by the base may be insufficient.

JP 10-180073 A

  The present invention has been conceived under the above-described circumstances, and an object thereof is to provide a stirring blade and a stirring device capable of achieving advanced dispersion and mixing.

  The stirring blade provided by the first aspect of the present invention is a stirring blade mounted on a stirring device and provided with a blade group consisting of a plurality of blades which are axially rotated and arranged in a rotational direction. A plurality of plate members made of a single metal plate material, each having a base located at a radial center and a plurality of blade elements connected radially outward with respect to the base; The blade portion is characterized in that the blade elements of the plurality of plate members adjacent to each other in the axial direction have blade surfaces that allow stirring objects to flow, which are configured to be in contact with or close to each other.

  In a preferred embodiment of the present invention, the plurality of plate members are configured to be separable from each other.

  In a preferred embodiment of the present invention, the blade elements of the plurality of plate members are in contact with or in proximity to each other to have a positioning mechanism for forming the blade surface.

  In a preferred embodiment of the present invention, the blade portion has a front curved portion connected to the inward end in the radial direction and convex forward in the rotational direction in the axial direction view.

  In a preferred embodiment of the present invention, the blade portion has a rear curved portion connected to the radial outward with respect to the front curved portion and convex in the rotational direction rearward in the axial direction.

  In a preferred embodiment of the present invention, a pair of the blade groups located on both sides in the axial direction is provided.

  In a preferred embodiment of the present invention, the blade group located on one side in the axial direction and the blade group located on the other side are different from each other in the rotational direction position of each of the blade portions.

  According to a second aspect of the present invention, there is provided a stirring apparatus including: a container for containing an object to be stirred, a rotary shaft inserted into the container, and the first side of the present invention attached to the rotary shaft And the provided stirring blade.

  According to the present invention, advanced dispersion and mixing can be achieved.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a perspective view which shows the stirring blade which concerns on 1st Embodiment of this invention. It is a front view which shows the stirring blade which concerns on 1st Embodiment of this invention. It is a top view which shows the stirring blade which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the stirring apparatus using the stirring blade which concerns on 1st Embodiment of this invention. It is a perspective view which shows the stirring blade which concerns on 2nd Embodiment of this invention. It is a front view which shows the stirring blade which concerns on 2nd Embodiment of this invention. It is a top view which shows the stirring blade which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the stirring blade which concerns on 3rd Embodiment of this invention. It is a front view which shows the stirring blade which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the stirring apparatus using the stirring blade which concerns on 3rd Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  In the following description, stirring is a concept including dispersion and mixing. To disperse the stirring target refers to an operation in which another substance (for example, liquid or powder) is dispersed in a micro state in the substance (for example, liquid) that is chemically one phase. Furthermore, mixing the mixing targets refers to an operation of mixing in the container so that the mixing targets stored in the container have more uniform properties.

First Embodiment
1 to 3 show a stirring blade according to a first embodiment of the present invention. The stirring blade A1 of the present embodiment includes the mounting portion 11, the shaft portion 12, and the blade group 2, and includes a plurality of plates 3 and 4 as members constituting the blade group 2.

  FIG. 1 is a perspective view showing the stirring blade A1. FIG. 2 is a front view showing the stirring blade A1. FIG. 3 is a plan view showing the stirring blade A1 viewed from the upper side in the z direction in FIGS. 1 and 2. The rotation direction θ is a direction in which the stirring blade A1 rotates, and is a direction generally referred to as a circumferential direction with respect to the axial direction z and the radial direction r. Moreover, the arrow in these figures has shown the direction which stirring blade A1 rotates.

  Stirring blade A1 is attached to, for example, stirring device B1 shown in FIG. The stirring device B1 includes a container 81, a rotating shaft 82, and a drive unit 83. The container 81 accommodates a stirring target T which is a target of dispersion and mixing. The rotary shaft 82 is attached at its lower end to the stirring blade A 1 and inserted into the stirring target T of the container 81. The driving unit 83 rotates the rotation shaft 82 about the axial direction z, and includes, for example, a motor. As another component of the stirring device B1, for example, a case for supporting the container 81 and the drive unit 83, a control unit for controlling the drive of the drive unit 83, or the like may be appropriately adopted.

  As a structure for attaching the stirring blade A1 to the rotation shaft 82 of the stirring device B1, attachment mechanisms such as various engagement mechanisms and fastening mechanisms may be employed, or the rotation shaft 82 and at least a part of the stirring blade A1 It may be an integrally formed structure. The size of the stirring blade A1 is not particularly limited, and in the present embodiment, the diameter of the stirring blade A1 is about 50 mm.

  The attachment portion 11 is a portion for attaching the stirring blade A1 to the rotation shaft 82 of the stirring device B1. The mounting portion 11 fixes the stirring blade A1 to the rotation shaft 82 by, for example, a method such as engagement or fastening with a screw.

  The shaft portion 12 is connected to the mounting portion 11 and has a cylindrical or cylindrical shape along the axial direction z.

  The material of the mounting portion 11 and the shaft portion 12 is not particularly limited, and a metal, a resin, or the like is appropriately selected. As a preferable metal which comprises the attaching part 11 and the axial part 12, stainless steel is mentioned, for example.

  The blade group 2 includes a plurality of blades 20 supported by the shaft 12 and arranged in the rotational direction θ. As shown in FIG. 2, the plurality of blades 20 constituting the blade group 2 are disposed in a predetermined range in the axial direction z.

  The number of the plurality of blades 20 constituting the blade group 2 is not particularly limited. In the present embodiment, the number of the plurality of blades 20 constituting the blade group 2 is four. In addition, the four blades 20 are arranged at equal pitches, and in the illustrated example, the pitch is 90 degrees.

  The plate 3 is made of a single metal plate material and has a base 31 and a plurality of blade elements 32. The metal material which comprises the board | plate material 3 is not specifically limited, A stainless steel is mentioned as a preferable example. The thickness of the plate 3 is not particularly limited, and is, for example, 1 to 10 mm.

  The base 31 is located at the center of the radial direction r, and is provided at the boundary between the mounting portion 11 and the shaft 12 in the illustrated example. The fixing method of the base 31 and the attachment portion 11 and the shaft portion 12 is not particularly limited. For example, according to a fastening method using a screw, it is possible to separate the mounting portion 11 and the shaft portion 12 from the plate member 3 and it is suitable for performing cleaning after use. In addition, the stirring blade A1 may be configured to have a positioning mechanism for forming blade surfaces to be described later, with the blade elements 32 of the plurality of plate members 3 contacting or approaching each other. For example, when reassembling the separated mounting portion 11 and the shaft portion 12 and the plate member 3, the blade elements 32 of the plurality of plate members 3 contact or approach each other to form a blade surface by this positioning mechanism. The stirring blade A1 can be easily assembled. In the present embodiment, a method such as engagement for fixing the stirring blade A1 to the rotary shaft 82 or fastening with a screw functions as the above-mentioned positioning mechanism. For this reason, when the stirring blade A1 is fixed to the rotating shaft 82, the mounting portion 11, the shaft portion 12 and the plate member 3 are simultaneously positioned. This is an example of the positioning mechanism, and the positioning mechanism is not limited to this. For example, a method of providing a key groove between the mounting portion 11 and the shaft portion 12 and the plate member 3 can also be used. Moreover, according to the fastening method which performed welding, the attaching part 11, the axial part 12, and the board | plate material 3 are integrated by joining by welding. In such a configuration, it is possible to eliminate the gap between the mounting portion 11 and the shaft portion 12 and the plate member 3 and it is suitable for cleaning after use.

  The plurality of blade elements 32 are connected to the base 31. Each of the plurality of blade elements 32 is included in the blade portion 20. The number of the plurality of blade elements 32 is four corresponding to the number of the plurality of blade portions 20.

  In the illustrated example, the blade element 32 has a first surface portion 321 and a second surface portion 322. Each of the first surface portion 321 and the second surface portion 322 is a flat portion. In addition, the blade | wing element 32 is not limited to what consists of a some flat part, You may have a curved-plate-shaped site | part.

  The first surface portion 321 is a portion connected to the base 31. The first surface portion 321 is connected to the base 31 via a bent portion. In the illustrated example, the first surface portion 321 stands upward in the axial direction z with respect to the base 31. The shape of the first surface portion 321 is not particularly limited, and is approximately triangular in the illustrated example. The first surface portion 321 is inclined so as to be positioned forward in the rotational direction θ as it is positioned upward in the axial direction z.

  The second surface portion 322 is a portion connected to the first surface portion 321. The second surface portion 322 is connected to the first surface portion 321 via a bent portion. In the illustrated example, the second surface portion 322 is connected radially outward with respect to the first surface portion 321. The shape of the second surface portion 322 is not particularly limited, and is approximately triangular in the illustrated example. The second surface portion 322 is inclined so as to be positioned forward in the rotational direction θ as it is positioned upward in the axial direction z. Further, as shown in FIG. 3, the second surface portion 322 is inclined so as to be positioned more rearward in the rotational direction θ as it is positioned outward in the radial direction r in the axial direction z as compared with the first surface portion 321.

  The plate 4 is made of a single sheet metal material and has a base 41 and a plurality of blade elements 42. The metal material which comprises the board | plate material 4 is not specifically limited, A stainless steel is mentioned as a preferable example. The thickness of the plate 4 is not particularly limited, and is, for example, 1 to 10 mm.

  The base 41 is located at the center in the radial direction r, and is provided apart from the base 31 in the axial direction z. In the illustrated example, the base 41 is provided at the lower end of the shaft 12. The fixing method of the base 41 and the shaft 12 is not particularly limited. For example, according to a fastening method using a screw, it is possible to separate the shaft portion 12 and the plate member 4 and is suitable for performing cleaning after use. Moreover, according to the fastening method which performed welding, the axial part 12 and the board | plate material 4 are integrated by joining by welding. In such a configuration, it is possible to eliminate the gap between the shaft portion 12 and the plate member 3 and it is suitable for performing cleaning after use.

  The plurality of blade elements 42 are connected to the base 41. Each of the plurality of blade elements 42 is included in the blade portion 20. The number of the plurality of blade elements 42 is four corresponding to the number of the plurality of blade portions 20.

  In the illustrated example, the blade element 42 has a first surface portion 421, a second surface portion 422 and a third surface portion 423. Each of the first surface portion 421, the second surface portion 422, and the third surface portion 423 is a flat portion. In addition, the blade | wing element 42 is not limited to what consists of a some flat part, You may have a curved-plate-shaped site | part.

  The first surface portion 421 is a portion connected to the base 41. The first surface portion 421 is connected to the base 41 via the bent portion. In the illustrated example, the first surface portion 421 stands upward in the axial direction z with respect to the base 41. The shape of the first surface portion 421 is not particularly limited, and is approximately triangular in the illustrated example. The first surface portion 321 is inclined so as to be positioned forward in the rotational direction θ as it is positioned upward in the axial direction z.

  In the present embodiment, the second surface portion 322 of the blade element 32 and the first surface portion 421 of the blade element 42 are close to each other. The second surface 322 has a proximal edge 320 and the first surface 421 has a proximal edge 420. The near edge 320 and the near edge 420 are edges close to each other. In the illustrated example, the proximal edge 320 and the proximal edge 420 are parallel to one another. Also, in the illustrated example, the proximal edge 320 and the proximal edge 420 are spaced apart. The size of the gap is not particularly limited, and is preferably 0.25 to 1.0 times the thickness of the plate 3 and the plate 4. Note that, unlike the illustrated example, at least a part of the near edge 320 and the near edge 420 may be in contact with each other. Furthermore, the proximal end 320 and the proximal end 420 may be joined by welding to connect the proximal end 320 and the proximal end 420 without a gap therebetween.

  The second surface portion 422 is a portion connected to the first surface portion 421. The second surface portion 422 is connected to the first surface portion 421 through the bent portion. In the illustrated example, the second surface portion 422 is connected to the first surface portion 421 in the radial direction r outward. The shape of the second surface portion 422 is not particularly limited, and is approximately triangular in the illustrated example. The second surface portion 422 is inclined so as to be positioned forward in the rotational direction θ as it is positioned upward in the axial direction z. Further, as shown in FIG. 3, the second surface portion 422 is inclined so as to be positioned more rearward in the rotational direction θ as it is positioned outward in the radial direction r in the axial direction z as compared to the first surface portion 421.

  The third surface portion 423 is a portion connected to the second surface portion 422. The third surface portion 423 is connected to the second surface portion 422 via the bent portion. In the illustrated example, the third surface portion 423 is connected radially outward with respect to the second surface portion 422. The shape of the third surface portion 423 is not particularly limited, and is approximately triangular in the illustrated example. The third surface portion 423 is inclined so as to be positioned forward in the rotational direction θ as it is positioned upward in the axial direction z. Further, as shown in FIG. 3, the third surface portion 423 is inclined so as to be positioned forward in the rotational direction θ in the radial direction r as viewed in the axial direction z as compared to the second surface portion 422. Further, as shown in FIG. 2, the lower end in the axial direction z of the third surface portion 423 is located below the base 41.

  The wing portion 20 is configured to include a wing element 32 and a wing element 42. Although the blade portion 20 is constituted by the blade element 32 and the blade element 42 which are separate from each other, the blade portion 20 has a function of causing the stirring object T to be stirred to flow as one blade portion in stirring. The blade portion 20 has a blade surface in which the blade elements 32, 42 of the plate members 3, 4 adjacent in the axial direction z are in contact with or close to each other. In the present embodiment, the blade surface is a comprehensive surface configured by the first surface portion 321, the second surface portion 322, the first surface portion 421, the second surface portion 422, and the third surface portion 423. The blade surface causes the stirring target T to flow.

  The wing 20 has an inner end 21, a front curve 27 and a back curve 28. The inward end 21 is an end of the blade portion 20 positioned most inward in the radial direction r. In the illustrated example, as shown in FIGS. 1 and 2, the inner end 21 is constituted by the end edge of the first surface portion 321 of the blade element 32. In the present embodiment, the inward ends 21 of the plurality of blades 20 are separated from each other in the rotational direction θ.

  The front curved portion 27 is a portion connected to the inward end 21 and convex in the rotational direction θ forward in the axial direction z. More specifically, the front curved portion 27 has a shape that is convex forward in the rotational direction θ than an imaginary straight line connecting both ends in the radial direction r of the front curved portion 27. In the present embodiment, the front curved portion 27 is configured by the first surface portion 321 and the second surface portion 322 of the blade element 32 and the first surface portion 421 of the blade element 42.

  The rear curved portion 28 is a portion connected radially outward with respect to the front curved portion 27 and convex in the rotational direction θ rearward in the axial direction z. More specifically, the rear curved portion 28 has a shape that is convex rearward in the rotational direction θ than a virtual straight line connecting both ends of the rear curved portion 28 in the radial direction r. In the present embodiment, the rear curved portion 28 is configured by the second surface portion 422 and the third surface portion 423 of the blade element 42.

  In FIG. 1 to FIG. 3, for the front curved portion 27 and the rear curved portion 28, respective ranges are indicated by dashed dotted arrows for the sake of understanding. In the present embodiment, the wing portion 20 has a substantially S-shape by having the front curved portion 27 and the rear curved portion 28. In addition, the range in which the front curve part 27 and the back curve part 28 are provided, and each curvature degree etc. are not limited.

  Further, in the present embodiment, the front curved portion 27 is inclined so as to be positioned forward in the rotational direction θ in the axial direction z, and is positioned forward in the rotational direction θ as the rear curved portion 28 is positioned upward in the axial direction z. It is inclined to do.

  Next, the operation of the stirring blade A1 and the stirring device B1 will be described.

  According to the present embodiment, the blade portion 20 is configured to include the blade elements 32 of the plate 3 and the blade elements 42 of the plate 4 which are close to each other. The blade element 32 and the blade element 42 are respectively connected to a base 31 and a base 41 provided apart from each other in the axial direction z. Therefore, the blade portion 20 can have a larger area as compared with the blade element 32 alone or the blade element 42 alone, a larger standing dimension in the axial direction z, or a more complicated shape. It is. Further, since the blade element 32 and the blade element 42 are supported by the base 31 and the base 41 respectively, when forming a blade having the same shape, the same size and the same angle as the blade 20 by a single sheet metal material Compared to the above, the support strength can be increased. Further, the blade portion 20 has a blade surface in which the blade elements 32, 42 of the plate members 3, 4 adjacent in the axial direction z are in contact with or close to each other. With this blade surface, for example, it is possible to flow the stirring target T more efficiently, as compared with the case where the stirring target T flows in a state where the blade elements 32 and 42 are separated from each other. Therefore, it is possible to more effectively flow the stirring target T, and it is possible to enhance dispersion and mixing.

  The clearance between the near edge 320 and the near edge 420 ensures cleaning of the stirring object T deposited between the near edge 320 and the near edge 420 after the use of the stirring blade A1. Can. Also, the proximity edge 320 and the proximity edge 420 being parallel to each other can prevent the occurrence of an excessive gap between the proximity edge 320 and the proximity edge 420. The fact that the gap between the close end edge 320 and the close end edge 420 is 0.25 to 1.0 times the thickness of the plate 3 and the plate 4 means that the flow by the blade 20 is impeded by the gap. While suppressing, it is preferable to perform washing appropriately. Alternatively, unlike the illustrated example, the welding target attached to the mounting portion 11, the shaft portion 12, and the near end edge 320 and the near end edge 420 by welding together and eliminating the gap, the stirring object attached after use of the stirring blade A1 T can be cleaned reliably.

  Moreover, compared with the mixing state by the stirring blade X, the larger flow rate is obtained in the wider range of the container 81 compared with the mixing state by the stirring blade A1, and the whole stirring object T is mixed more highly.

  First of all, the contribution of the front curved portion 27 of the blade portion 20 can be mentioned as a factor of enhancing the mixing by the stirring blades A1 and A2. According to the research of the inventors, as shown in FIG. 3 and FIG. 6, by making the front curved portion 27 convex forward in the rotational direction θ, the stirring object T is more strongly suctioned at the inner end 21 It has been found that it is possible to move the suctioned target T sucked more smoothly outward in the radial direction r. In particular, in the illustrated example, the angle formed between the blade 20 at the inward end 21 and the rotational direction θ is relatively small, which is advantageous for suctioning the stirring target T more strongly. It turned out to be. Further, in the front curved portion 27 shown in the figure, the angle between the blade portion 20 and the rotational direction θ gradually increases toward the outer side in the radial direction r. It turned out to be advantageous to move outward more smoothly. The strong suction and smooth movement are considered to be one factor that causes the mixing of the entire stirring object T to occur.

  According to the research of the inventors, by making the front curved portion 27 convex in the forward direction of rotation θ, the aspirating target T sucked in the radial direction r while attracting the aspirating target T more strongly at the inward end 21 It was found that it was possible to move more smoothly outward. Moreover, according to the research of the inventors, by providing the rear curved portion 28 that is convex in the rotational direction θ backward, in the rear curved portion 28, the blade portion 20 and the rotational direction θ move outward in the radial direction r. It has been found that the angle between the tip and the tip gradually increases, and the effect of discharging the suctioned stirring target T from the stirring blade A1 radially outward is obtained more forcefully. The combination of the suction enhancement by the front curved portion 27 and the discharge enhancement by the rear curved portion 28 act synergistically to promote mixing of the entire agitation target T.

  In addition, it is possible to prevent the air bubbles mixed in the stirring object T from staying in the rear of the rotational direction θ of the blade 20 by tilting the blade 20 forward in the rotational direction θ. The stagnation of air bubbles can be a factor that hinders the mixing of the stirring target T by the stirring blade A1. According to the stirring blade A1, the remaining of the air bubbles can be suppressed, which is preferable for enhancing the mixing of the stirring target T.

  5 to 10 show another embodiment of the present invention. In these figures, elements that are the same as or similar to the above embodiment are given the same reference numerals as the above embodiment.

Second Embodiment
5 to 7 show a stirring blade according to a second embodiment of the present invention. The stirring blade A2 of this embodiment is different from the stirring blade A1 in the configuration of the blade portion 20. FIG. 5 is a perspective view showing the stirring blade A2. FIG. 6 is a front view showing the stirring blade A2. FIG. 7 is a plan view showing the stirring blade A2 as viewed from above in the axial direction z of FIG. The stirring blade A2 is used by being attached to the stirring device B1 in the same manner as the stirring blade A1.

  In the present embodiment, the blade portion 20 has only the front curved portion 27 and does not have the rear curved portion 28 described for the stirring blade A1. That is, as shown in FIG. 7, the entire wing portion 20 is configured by the front curved portion 27 in the axial direction z. Further, in the present embodiment, the number of the plurality of blade portions 20 is three. Corresponding to this, the number of the plurality of blade elements 32 of the plate 3 and the number of the plurality of blade elements 42 of the plate 4 are all three.

  Further, in the present embodiment, the base 31 and the base 41 are fixed to both sides in the axial direction z of the shaft portion 12. The mounting portion 11 described for the stirring blade A1 is not provided to the stirring blade A2. The stirring blade A2 may be attached to the rotating shaft 82 by a method using engagement or a screw using the shaft portion 12, the base 31, the base 41 and the like. Alternatively, the stirring blade A2 may have the same portion as the mounting portion 11.

  The blade element 32 has a first surface 321 and a second surface 322. In the illustrated example, the first surface portion 321 has a substantially rectangular shape. The second surface portion 322 has a substantially triangular shape. As shown in FIG. 7, the second surface portion 322 is inclined so as to be positioned more rearward in the rotational direction θ as it is positioned outward in the radial direction r in the axial direction z as compared to the first surface portion 321.

  The blade element 42 has a first surface portion 421, a second surface portion 422 and a third surface portion 423. In the illustrated example, the first surface portion 421, the second surface portion 422, and the third surface portion 423 have a substantially triangular shape. In addition, as shown in FIG. 6, the first surface portion 421, the second surface portion 422, and the third surface portion 423 are arranged from the lower side in the axial direction z to the upper side in the order from the base 41 side. As shown in FIG. 7, the second surface portion 422 is inclined so as to be positioned more rearward in the rotational direction θ as it is positioned outward in the radial direction r in the axial direction z as compared to the first surface portion 421. Further, the third surface portion 423 is inclined so as to be positioned more rearward in the rotational direction θ as it is positioned outward in the radial direction r in the axial direction z as compared to the second surface portion 422.

  In the present embodiment, the second surface portion 322 of the blade element 32 and the third surface portion 423 of the blade element 42 are close to each other. The proximal end edge 320 of the second surface portion 322 and the proximal end edge 420 of the third surface portion 423 are parallel to each other with a gap. The size of this gap is the same as that of the stirring blade A1. In the present embodiment, the first surface portion 321, the second surface portion 322, the third surface portion 423, the second surface portion 422, and the first surface portion 421 are arranged in this order from inside in the radial direction r. The wing part 20 which has only is comprised. Further, as shown in FIG. 6, the blade portion 20 is provided at the same position as the base portion 41 and at a position above the base portion 41 in the axial direction z.

  Such an embodiment can also enhance dispersion and mixing. Moreover, also in this embodiment, it is thought that the front curve part 27 of the blade | wing part 20 contributes to the advancement of mixing similarly to stirring blade A1. The strong suction and the smooth movement by the front curve 27 are considered to be one factor that causes the mixing of the entire stirring object T. In particular, in the stirring blade A1, the fact that the rear curved portion 28 is convex rearward in the rotational direction θ has the effect of more strongly discharging the suctioned stirring target T outward from the stirring blade A1 in the radial direction r. In addition to this, the back curved portion 28 may exert an effect of strongly discharging the stirring target T forward in the rotational direction θ. If the discharge is excessive, an air drawing vortex due to centrifugal force is generated in the stirring target T. In the stirring blade A2, by suppressing the excessive discharge, it is possible to expect the effect of making it difficult to generate the air drawing vortex due to the forward flow in the rotational direction θ.

Third Embodiment
8 and 9 show a stirring blade according to a third embodiment of the present invention. The stirring blade A3 of the present embodiment includes a pair of blade groups 2.

  FIG. 8 is a perspective view showing the stirring blade A3. FIG. 9 is a front view showing the stirring blade A3.

  The pair of blade groups 2 includes a plurality of blade portions 20 located on one side and the other side in the axial direction z and arranged in the rotational direction θ. As shown in FIG. 9, the plurality of blades 20 constituting one blade group 2 are disposed in a predetermined range in the axial direction z. Further, the plurality of blade portions 20 constituting the pair of blade groups 2 do not overlap with each other in the axial direction z. The configuration of the blade portion 20 is similar to that of the blade portion 20 of the stirring blade A1 described above. Further, the plate members 3 and the plate members 4 constituting the blade group 2 have the same configuration as the plate members 3 and the plate members 4 of the stirring blade A1.

  In the present embodiment, the number of the plurality of blade portions 20 constituting the two blade groups 2 is four. In addition, the four vanes 20 are arranged at equal pitches, and in the illustrated example, the pitch is 90 degrees.

  As shown in FIGS. 8 and 9, in the pair of blade groups 2, the rotational directions θ of the respective blade portions 20 are different from each other. More specifically, in the present embodiment, four blades 20 constituting each blade group 2 are arranged at a pitch of 90 degrees in the rotational direction θ. And blade part 20 comrades which constitute a pair of blade groups 2 are arranged in a position which shifted 45 degrees in rotation direction theta. That is, the pair of blade groups 2 are in a mutually offset relationship by an orientation corresponding to half of the arrangement pitch of the blade portions 20.

  FIG. 10 shows an example of a stirring device using the stirring blade A3. Stirring apparatus B3 of this example is equipped with two rotating shafts 82 and stirring blade 84 other than stirring blade A3.

  The two rotation shafts 82 are rotationally driven by the drive unit 83, respectively. The lengths and rotational speeds of the two rotary shafts 82 can be set as appropriate. The stirring blade 84 is a stirring blade that is relatively larger than the stirring blade A3, and is disposed at the center in the radial direction r near the bottom of the container 81. The stirring blade 84 is provided, for example, for the purpose of promoting the mixing of the entire stirring target T in the container 81.

  In this example, the stirring blade A3 is disposed closer to the side wall of the container 81 in the radial direction r, and is located above the stirring blade 84 in the axial direction z.

  Also according to the present embodiment, advanced dispersion and mixing can be achieved. Further, also in the present embodiment, as in the case of the stirring blade A1, the mixing of the entire stirring target T is promoted by the synergistic action of reinforcement of suction by the front curved portion 27 and reinforcement of discharge by the rear curved portion 28. It is considered to be

  Further, in the stirring blade A3, the pair of blade groups 2 are provided so as to be offset from each other by half a pitch in the rotational direction θ. For this reason, in the stirring by the stirring blade A3, it is possible to suppress that the axial direction z direction components of the stirring target T discharged from the pair of blade groups 2 interfere with each other. Thereby, the flow which flows in from the one blade group 2 to the side where the other blade group 2 exists in the axial direction z is promoted. This is advantageous to the advancement of mixing.

  The stirring blade and the stirring device according to the present invention are not limited to the embodiments described above. The specific configuration of each part of the stirring blade and the stirring device according to the present invention can be varied in design in many ways.

  The wing portion 20 is not limited to the configuration including only the wing element 32 and the wing element 42. In addition to the plate 3 and the plate 4, by providing another plate, the blade portion 20 may be configured to include another blade element in addition to the blade element 32 and the blade element 42.

A1, A2 and A3: stirring blades B1 and B3: stirring devices 1: base 2: blades 3: plate 4 4: plate 11: mounting portion 12: shaft portion 20: blade portion 21: inward end 27: front curved portion 28 A: back curved portion 31: base 32: blade element 41: base 42: blade element 81: container 82: container 82: rotation shaft 83: drive portion 84: stirring blade 320: proximal edge 321: first surface portion 322: second surface portion 420: Proximity edge 421: first surface portion 422: second surface portion 423: third surface portion T: stirring target X: stirring blade r: radial direction z: axial direction θ: rotation direction

Claims (8)

What is claimed is: 1. A stirring blade comprising: a blade group attached to a stirring device, rotated in an axial direction, and including a plurality of blades arranged in a rotational direction;
Each comprising a single metal sheet material, a radially centered base and a plurality of vane elements connected to the base, and comprising a plurality of axially laminated plates;
The stirring blade is characterized in that the blade portion has a blade surface that causes a stirring target to flow such that the blade elements of the plurality of plate members adjacent in the axial direction are in contact with or close to each other.   The stirring blade according to claim 1, wherein the plurality of plate members are configured to be separable from each other.   The stirring blade according to claim 1 or 2, wherein the blade elements of the plurality of plate members are in contact with or close to each other to have a positioning mechanism for forming the blade surface.   The stirring blade according to any one of claims 1 to 3, wherein the blade portion has a front curved portion connected to the inward end in the radial direction and convex in the rotational direction front in the axial direction view.   The stirring blade according to claim 4, wherein the blade portion has a rear curved portion connected to the radial outward with respect to the front curved portion and convex in the rotational direction backward in the axial direction view.   The stirring blade according to any one of claims 1 to 5, comprising a pair of the blade groups located on both sides in the axial direction.   The stirring blade according to claim 6, wherein the blade group located on one side in the axial direction and the blade group located on the other side are different from each other in the rotational direction position of each of the blade portions. A container for containing the object to be stirred;
A rotating shaft inserted into the container;
The stirring blade according to any one of claims 1 to 7, mounted on the rotating shaft,
A stirring apparatus comprising:

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