JP2011255289A - Stirring rotor and stirring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stirring rotor and a stirring device, performable of a stirring operation in a safe and efficient manner, irrespective of intended purposes.SOLUTION: The stirring rotor 1 comprises a rotor body 10 adapted to be rotated around a rotation axis C, an inlet port 12 provided in the outer surface of the rotor body 10, an outlet port 14 provided in the outer surface of the rotor body 10, and a flow passage 16 making the inlet port 12 communicate with the outlet port 14. The rotor body 10 has an inclined surface 10b which recedes from the rotation axis C little by little from one side of a rotation axis C direction to another direction. The inlet port 12 is provided at a position closer to the rotation axis C than the outlet port 14. The outlet port 14 is provided at a position more outward in a centrifugal direction from the rotation axis C than the inlet port 12, and at least a part of the outlet port 14 is located on the inclined surface 10b.

Description

  The present invention relates to a rotating body for stirring and a stirring device for stirring, mixing, dispersing, and the like of liquids and other various fluids.

  Conventionally, for example, when two or more kinds of fluids are mixed or various powders added to the fluid are uniformly dispersed, a stirrer that rotates an impeller in the fluid is used. This impeller is generally provided with a propeller blade and a turbine blade, and agitation is performed by flowing a fluid by rotating.

  Such a stirrer is often used by being permanently installed in a tank containing a fluid, but in addition to this, for example, a handy type for stirring a paint etc. on the spot immediately before use is often used. in use. This handy type agitator is generally configured by providing an impeller at the tip of a drive shaft of a hand drill type drive device. Then, the user holds the drive device in both hands, inserts the impeller at the tip into a container in which an object to be stirred such as a paint is stored, and rotates to perform stirring.

  However, this handy type stirrer is very dangerous because an impeller having a sharp blade tip is rotated at a high speed, and there is a problem that it requires careful handling. Also, if an impeller with many protrusions hits the container, or if the impeller causes fatigue failure, the tip of the impeller or part of the container is missing or scraped and mixed into the object to be stirred. There was a problem that it was easy to do.

  Also, since the impeller causes the material to be stirred to flow by colliding with the material to be stirred, in a stirrer equipped with an impeller, when the rotating impeller is put into the material to be stirred, or in the material to be stirred, the impeller When starting to rotate, there was a problem that the impeller was easily shaken by the reaction. For this reason, when the user is not operating the stirrer, situations such as hitting the impeller against the container or scattering the object to be stirred out of the container frequently occurred.

  In addition, in the impeller, when the agitated material contains sediment, the sediment cannot be dispersed well unless stirring is performed while the impeller is in contact with the bottom wall of the container. There has been a problem that debris and scraps generated by contact with the wall surface of the container are likely to be mixed into the object to be stirred.

  Moreover, in the stirrer provided with the impeller, there is a problem that the powder particles mixed in the object to be stirred may be pulverized by collision with the impeller. For this reason, it is difficult to sufficiently stir, for example, when it is not desired to make the mixed powder particles finer, such as a metallic paint.

  On the other hand, instead of using propeller blades and turbine blades, a mixer for a high-viscosity fluid in which an impeller is configured from a hexagonal cylindrical body and a plurality of holes are provided on a side surface has been proposed (for example, , See Patent Document 1).

JP-A-5-154368

  However, in the high-viscosity fluid mixer described in Patent Document 1, the outer shape of the impeller is a hexagonal column, and the agitated object is caused to flow mainly by colliding the outer wall of the impeller with the agitated object. The above-mentioned problem of recoil at the start of rotation and the problem of pulverization of powder particles in the object to be stirred were not solved.

  In addition, although the agitated material is allowed to flow out from the side holes, the volume inside the impeller is large relative to the side holes, so the flow rate inside the impeller is low, and the stagnant material will remain when used for a long time. There was a problem that the stirring ability was liable to deteriorate due to adhesion and deposition on the inside of the impeller.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the rotary body for stirring and stirring apparatus which can perform safe and efficient stirring irrespective of a use.

  (1) The present invention provides a main body that rotates about a rotation axis, a suction port provided on the surface of the main body, a discharge port provided on the surface of the main body, and a flow passage that connects the suction port and the discharge port. The main body has an inclined surface that gradually moves away from the rotation axis from one to the other in the direction of the rotation axis, and the suction port is disposed at a position closer to the rotation axis than the discharge port The agitation rotator is characterized in that the discharge port is disposed at a position on the outer side in the centrifugal direction from the rotation shaft than the suction port, and at least a part thereof is positioned on the inclined surface.

  (2) The present invention is also the stirring rotator according to (1), wherein the main body has a circular cross section perpendicular to the rotation axis.

  (3) The present invention is also the stirring rotator according to (1) or (2), wherein the main body has a hemispherical shape or a semi-ellipsoidal shape.

  (4) The present invention is also the stirring rotator according to (1) or (2) above, wherein the main body has a spherical or ellipsoidal shape.

  (5) The present invention is also characterized in that a plurality of the discharge ports are provided, and the suction port and the flow passage are individually provided for each of the plurality of discharge ports. The rotating body for stirring according to any one of the above.

  (6) In the present invention, any of the above (1) to (5) is characterized in that the suction port is provided on the opposite side of a drive shaft connected to the main body for rotating the main body. It is a rotating body for stirring according to the above.

  (7) The present invention is also the stirring rotator according to any one of (1) to (6), wherein the suction port is provided on the outer side in the centrifugal direction of the rotating shaft.

  (8) The rotating body for stirring according to any one of (1) to (7), wherein the present invention further includes a guide member that guides the flow from the discharge port in a predetermined direction. It is.

  (9) In the present invention, the flow passage is configured to connect the one discharge port and the plurality of suction ports, and the plurality of suction ports connected to the one discharge port are connected to the rotation shaft. The stirring rotator according to any one of the above (1) to (8), characterized in that the distances in the centrifugal direction are different from each other.

  (10) The present invention is also characterized in that a drive shaft for rotating the main body is connected to the main body, and the drive shaft includes a shaft flow passage that connects an opening provided in the main shaft and the flow passage. The stirring rotator according to any one of (1) to (9) above.

  (11) The present invention is also characterized in that a supply device for supplying a fluid or a mixture of fluid and solid is connected to the flow passage through the shaft flow passage. It is a rotating body for stirring as described in said (10).

  (12) The present invention is also a stirrer characterized in that a plurality of the stirrer rotating bodies according to any one of (1) to (11) above are arranged in the rotation axis direction. .

  According to the present invention, it is possible to achieve an excellent effect that it is possible to perform safe and efficient stirring regardless of use.

(A) It is a top view of the rotary body for stirring which concerns on embodiment of this invention. (B) It is a front view of the rotary body for stirring. (C) It is a bottom view of the rotating body for stirring. (A) It is the top view which showed the action | operation of the rotary body for stirring. (B) It is the front view which showed the action | operation of the rotary body for stirring. It is the schematic which showed the usage example of the rotating body for stirring (a) and (b). It is the front view which showed the example which comprised the (a)-(c) main body in spherical shape. It is the front view which showed the example which comprised the (a)-(c) main body in spherical shape. (A)-(c) It is the front view which showed the example of the other shape of a main body. It is the front view which showed the example which provided the guide member in the (a)-(c) main body. (A)-(c) It is the front view which showed the example which connected the some suction inlet with respect to one discharge outlet. (A)-(c) It is the fragmentary sectional view which showed the example which provided the axial part flow path in the drive shaft connected to a main body. (A)-(d) It is sectional drawing which showed the example of the other form of a connection port. It is the front view which showed the example of the stirring apparatus which concerns on embodiment of this invention.

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

  First, the structure of the stirring rotating body 1 according to the embodiment of the present invention will be described. FIG. 1A is a plan view of the stirring rotator 1, FIG. 1B is a front view of the stirring rotator 1 (the same side view), and FIG. It is a bottom view of the rotary body 1 for use. As shown in these drawings, the stirring rotator 1 includes a hemispherical main body 10, a plurality of suction ports 12 provided on the surface of the main body 10, and a plurality of discharge ports provided on the surface of the main body 10. 14 and a flow passage 16 formed inside the main body 10 so as to connect the suction port 12 and the discharge port 14.

  In this example, the main body 10 has a hemispherical shape that is a shape obtained by dividing a sphere into halves. Therefore, the surface of the main body 10 is composed of a planar upper surface 10a that is a surface perpendicular to the central axis C of the main body 10 and a spherical inclined surface 10b that is a surface inclined with respect to the central axis C. Has been. More specifically, the inclined surface 10b is a surface that gradually moves away from the central axis C from one side (downward in the figure) to the other side (upward in the figure) in the direction of the central axis C. In other words, the main body 10 has a shape in which the thickness in the direction of the central axis C gradually decreases toward the outer side in the radial direction.

  In the center of the upper surface 10a of the main body 10, a connecting portion 18 to which a driving shaft 20 connected to a driving device such as a motor is connected is provided. Therefore, the stirring rotating body 1 is configured to rotate about the central axis C of the main body 10 as a rotation axis. In addition, the connection method of the drive shaft 20 and the connection part 18 may be any known method such as a screw or engagement.

  In this embodiment, the strength of the main body 10 is increased by configuring the main body 10 other than the flow passage 16 to be solid. The material which comprises the main body 10 is not specifically limited, For example, a suitable material according to use conditions, such as a metal, ceramics, resin, rubber | gum, wood, etc., is employable. Since the main body 10 of the present embodiment is simple and easy to process, the main body 10 can be configured from a wide variety of materials without being limited by the manufacturing method.

  Further, since the main body 10 is configured in such a simple shape, the occurrence of unbalance with respect to the rotating shaft can be reduced. For this reason, in the present embodiment, unlike an impeller or the like that tends to cause unbalance, it is possible to substantially eliminate vibrations and whirling during rotation.

  The suction port 12 is provided at the distal end portion of the main body 10 (the portion on the central axis C side of the inclined surface 10 b) opposite to the connection portion 18. In the present embodiment, the four suction ports 12 are arranged at equal intervals on the circumference centered on the central axis C and are formed in the same direction as the central axis C. The discharge port 14 is provided in a side surface portion of the main body 10 (portion on the upper surface 10a side of the inclined surface 10b). In other words, in the present embodiment, the four discharge ports 14 are arranged at positions outside the respective suction ports 12 from the central axis C of the main body 10 in the centrifugal direction (radial direction) (in a direction perpendicular to the central axis C from the central axis C). They are placed at separate locations. Further, the discharge port 14 is formed in a direction orthogonal to the central axis C.

  The flow passage 16 is formed as a passage connecting one suction port 12 and one discharge port 14. Accordingly, four flow passages are formed in the main body 10. Each flow passage 16 is formed so as to be straight from the suction port 12 along the direction of the central axis C, then bend at a right angle, and straight forward in the centrifugal direction of the main body 10 to reach the discharge port 14.

  In the present embodiment, the flow passage 16 is configured in this way, so that the suction port 12, the discharge port 14, and the flow passage 16 can be easily formed by drilling with a drill. Specifically, the suction port 12, the discharge port 14, and the flow passage 16 can be easily formed by drilling a hole from the position of the suction port 12 in the direction of the central axis C and drilling a hole from the position of the discharge port 14 toward the central axis C. Can be formed. In addition, in this embodiment, although the cross-sectional shape of the flow path 16 is comprised circularly, it is not limited to this, For example, it is good also as other cross-sectional shapes, such as an ellipse and a polygon.

  Next, the operation of the stirring rotating body 1 will be described. FIG. 2A is a plan view showing the operation of the stirring rotator 1, and FIG. 2B is a front view showing the operation of the stirring rotator 1. The stirring rotating body 1 is driven by the drive shaft 20 and rotates about the central axis C in the object to be stirred that is a fluid, thereby stirring the object to be stirred.

  When the stirring rotator 1 is immersed in the fluid and rotated, the fluid that has entered the flow passage 16 also rotates together with the stirring rotator 1. Then, centrifugal force acts on the fluid in the flow passage 16, and the fluid in the flow passage 16 flows toward the outside in the radial direction of the stirring rotating body 1 as shown in these drawings. Since the discharge port 14 is provided on the outer side in the centrifugal direction of the main body 10 than the suction port 12, a centrifugal force stronger than that of the suction port 12 acts on the discharge port 14. Accordingly, the fluid flows from the suction port 12 toward the discharge port 14 as long as the stirring rotator 1 rotates. That is, the fluid in the flow passage 16 is ejected from the discharge port 14, and the external fluid is sucked into the flow passage 16 from the suction port 12. Thereby, in the fluid around the stirring rotator 1, a flow that spreads radially from the side surface portion with the discharge port 14 and a flow toward the tip of the stirring rotator 1 with the suction port 12 are generated. Become.

  Further, when the stirring rotator 1 is immersed in the fluid and rotated, the fluid near the surface of the stirring rotator 1 rotates together with the stirring rotator 1 due to the influence of viscosity. Accordingly, centrifugal force also acts on the fluid in the vicinity of the surface of the stirring rotor 1, and the fluid in the vicinity of the surface flows to the vicinity of the discharge port 14 along the surface of the stirring rotor 1 as shown in these drawings. Then, it becomes an accompanying flow of the jet from the discharge port 14.

  In the present embodiment, by configuring the main body 10 to be hemispherical, the flow in the vicinity of the tip of the stirring rotating body 1 can be smoothly merged with the flow spreading radially from the side surface. Moreover, by making the main body 10 into such a shape, a part of the flow toward the tip of the stirring rotator 1 is caused to flow smoothly to the vicinity of the discharge port 14 along the inclined surface 10b. It is possible to join the flow spreading radially. As a result, the rotating body for stirring 1 can generate a powerful flow in the surrounding fluid, so that efficient stirring can be performed.

  Further, in the present embodiment, by providing the discharge port 14 on the inclined surface 10b that is a surface gradually moving away from the rotation axis from one side to the other in the direction of the rotation axis (center axis C), even for a highly viscous fluid. Effective stirring can be performed.

  Specifically, when the discharge port 14 is arranged on a plane parallel to the rotation axis (center axis C), the gas in the flow passage 16 (before being immersed in the fluid) is obtained when trying to stir the highly viscous fluid. In some cases, the air or the like existing in the flow passage 16 cannot be discharged well, and the fluid cannot be ejected from the discharge port 14. The inventor of the present application has conducted extensive research and experiments on this phenomenon, and as a result, the discharge port 14 is not a plane parallel to the rotation axis (center axis C) but an inclined plane 10b that is a plane inclined with respect to the rotation axis. It has been found that the gas in the flow passage 16 can be immediately discharged even if the fluid is a highly viscous fluid.

  That is, by disposing the discharge port 14 on the inclined surface 10b, the distance from the rotating shaft is made different between the tip end side (the opposite side of the connection portion 18) and the drive shaft side (the connection portion 18 side) of the discharge port 14, A difference in peripheral speed and acting centrifugal force can be generated between the distal end side of the discharge port 14 and the drive shaft side. Then, a turbulent flow is generated in the flow passage 16 near the discharge port 14 due to the difference between the peripheral speed and the centrifugal force at the discharge port 14, and the gas staying in the flow passage 16 is turbulent, so Can be discharged.

  Furthermore, by disposing the discharge port 14 on the inclined surface 10b, the flow along the inclined surface 10b is separated from the inclined surface 10b, and the discharge port 14 is brought closer to the separation point 10c where the flow in the centrifugal direction is caused (or the separation point). 10c can be in the discharge port 14). At the peeling point 10c, a negative pressure is generated along with the flow peeling from the inclined surface 10b. Therefore, the gas accumulated in the flow passage 16 due to the negative pressure by bringing the discharge port 14 close to the peeling point 10c. Can be sucked out from the discharge port 14.

  As described above, in this embodiment, the discharge port 14 is provided on the inclined surface 10b which is a surface gradually moving away from the rotation axis from one to the other in the direction of the rotation axis (center axis C). Even when stirring is started, gas is immediately discharged from the flow passage 16 so that stirring can be performed quickly and efficiently. In addition, even when gas enters the flow passage 16 due to some factor during stirring, the gas that has entered can be immediately discharged from the flow passage 16, so that the stirring force can be stably exhibited. It is possible.

  Furthermore, in the present embodiment, the flow spreading radially from the stirring rotating body 1 is more complicated (turbulent flow) due to the synergistic effect of the difference between the peripheral speed and centrifugal force at the discharge port 14 and the negative pressure at the separation point 10c. Therefore, it is possible to obtain an agitation force that is higher than that of the prior art.

  FIGS. 3A and 3B are schematic views showing an example of use of the stirring rotator 1. As shown in these drawings, the stirring rotating body 1 is connected to a driving shaft 20 connected to a driving device 30 such as a motor, and is immersed in an object to be stirred 50 that is a fluid contained in a container 40. Used in state. The driving device 30 may be fixed to the container 40, a pedestal, or the like, or may be held and operated by a user.

  By rotating the stirring rotator 1 by the driving device 30, a flow that radially spreads from the side surface of the stirring rotator 1 and a flow toward the tip of the stirring rotator 1 are generated as described above. As a result, as shown in FIGS. 4A and 4B, a complicated circulation flow is generated in the stirring object 50, and the stirring object 50 is sufficiently stirred by this circulation flow.

  In order to disperse the staying matter staying at the bottom of the container 40, the tip of the stirring rotor 1 may be brought close to the bottom of the container 40. By doing so, the staying material can be sucked up from the suction port 12 and ejected from the discharge port 14, and the staying material can be sufficiently dispersed in the stirring object 50. In addition, when the accumulated matter staying at the corner of the container 40 is dispersed, the tip of the stirring rotating body 1 may be brought close to the corner of the container 40. In the present embodiment, since the main body 10 is formed in a hemispherical shape, the suction port 12 can be sufficiently brought close to a narrow corner portion.

  In the present embodiment, the main body 10 is formed in a hemispherical shape so that it does not collide with the object to be stirred 50 at the time of rotation, so that almost no reaction occurs at the start of rotation. In addition, unlike the impeller and the like, the main body 10 is not provided with a sharp protrusion, and therefore the stirring rotator 1 or the container 40 is damaged even when the stirring rotator 1 is hit against the wall surface of the container 40. The possibility of scraping or scraping is low. For this reason, the rotating body 1 for stirring can be brought close to the wall surface of the container 40 with peace of mind, and it is possible to sufficiently stir all the corners of the container 40. It is difficult for scrap and the like to be mixed into the object to be stirred 50.

  In the present embodiment, the suction port 12 is disposed slightly outside the center of the tip of the stirring rotator 1 (center axis C, which is the rotation axis), so that the tip of the stirring rotator 1 is placed on the container 40. The suction port 12 is prevented from being blocked even when it is brought into contact with the wall surface. For this reason, the rotating body 1 for stirring can be stably operated even near the wall surface of the container 40.

  In the present embodiment, the cross-sectional area of the suction port 12 (cross-sectional area perpendicular to the flow passing through the suction port 12) and the cross-sectional area of the discharge port 14 (cross-sectional area perpendicular to the flow passing through the discharge port 14) are calculated. Although it is made substantially the same, it is not limited to this, You may make it vary these cross-sectional areas according to the use etc. of the rotary body 1 for stirring. However, in order to smoothly flow the fluid (stirred object) without staying in the flow passage 16 and to obtain an effective stirring capacity, the cross-sectional area of the suction port 12 (perpendicular to the flow passing through the suction port 12). The ratio of the cross-sectional area) to the cross-sectional area of the discharge port 14 (the cross-sectional area perpendicular to the flow passing through the discharge port 14) is preferably 1/3 to 3, and more preferably 1/2 to 2. Desirably, 5/6 to 1.2 is particularly desirable.

  In the present embodiment, the flow passage 16 is formed in an L shape that bends at a substantially right angle for ease of processing. However, the present invention is not limited to this, and the curved passage is smoothly curved. The flow path 16 may be configured, or the flow path 16 may be configured to connect the suction port 12 and the discharge port 14 in a straight line. By configuring the flow passage 16 in this way, the flow resistance in the flow passage 16 can be reduced, so that the flow caused by the stirring rotor 1 can be further strengthened and the stirring ability can be improved.

  Further, the discharge port 14 is arranged so as to be shifted in the rotational direction with respect to the suction port 12, and a portion connected to the discharge port 14 of the flow passage 16 is configured to have an angle with respect to the centrifugal direction of the stirring rotating body 1. Also good. Alternatively, the discharge port 14 may be arranged so as to be shifted in the direction of the rotation axis, and the portion connected to the discharge port 14 of the flow passage 16 may be configured to face the distal end side (opposite side of the connection portion 18) of the main body 10, Conversely, it may be directed to the drive shaft side (connector 18 side). Thus, the flow most suitable for efficient stirring can be obtained by appropriately setting the ejection direction from the discharge port 14.

  Further, the suction port 12 may be provided on the drive shaft side (upper surface 10a). In this case, all of the suction ports 12 may be provided on the drive shaft side, or a part of the plurality of suction ports 12 may be disposed on the tip side and the remaining part may be disposed on the drive shaft side. It may be. Further, the suction port 12 may be disposed on the inclined surface 10b and the connecting portion 18 may be provided so that the upper surface 10a is on the tip side. As described above, by appropriately setting the arrangement of the suction ports 12, it is possible to generate an optimal flow according to the application.

  Alternatively, one suction port 12 may be provided for the plurality of discharge ports 14, and the flow path 16 may be branched from the one suction port 12 to the plurality of discharge ports 14. In this case as well, in order to cause the fluid to flow smoothly without staying in the flow passage 16 and to obtain an effective stirring capacity, the cross-sectional area of the suction port 12 (a section perpendicular to the flow passing through the suction port 12). Area) and the sum of the cross-sectional area of the discharge port 14 (cross-sectional area perpendicular to the flow passing through the discharge port 14) is preferably 1/3 to 3, more preferably 1 / 2-2. Desirably, 5/6 to 1.2 is particularly desirable.

  In the present embodiment, the main body 10 is solid. However, the present invention is not limited to this, and the main body 10 may be hollow and the pipe-shaped flow passage 16 may be provided inside. . When it does in this way, the main body 10 can be comprised lightweight.

  In the present embodiment, the main body 10 is formed in a hemispherical shape. However, the shape of the main body 10 is not limited to this, and the shape of the main body 10 is gradually rotated from one of the rotation axes (center axis C) to the other. Any shape may be used as long as it has an inclined surface 10b that is far from the axis. For example, the main body 10 may be spherical, elliptical or semi-ellipsoidal. The main body 10 may be a partial sphere that is a part of a sphere, or a partial ellipsoid that is a part of an ellipsoid.

  4 (a) to 4 (c) and FIGS. 5 (a) to 5 (c) are front views (side views) showing an example in which the main body 10 is formed in a spherical shape. As shown in these drawings, when the main body 10 is formed in a spherical shape, inclined surfaces 10b and 10d are formed at two locations on the front end side and the drive shaft side. Thus, when the main body 10 has a plurality of inclined surfaces, the discharge port 14 may be arranged on any inclined surface regardless of the position of the suction port 12.

  For example, as shown in FIG. 4A, the suction port 12 is disposed on the distal end side of the main body 10, and the discharge port 14 connected to the suction port 12 is disposed on the inclined surface 10b on the distal end side. Good. Although not shown, the suction port 12 may be disposed on the drive shaft side, and the discharge port 14 connected to the suction port 12 may be disposed on the inclined surface 10d on the drive shaft side.

  Further, as shown in FIG. 5B, the suction port 12 is disposed on the distal end side of the main body 10 and the discharge port 14 connected to the suction port 12 is disposed on the inclined surface 10b on the distal end side. The suction port 12 may be disposed on the side and the discharge port 14 connected to the suction port 12 may be disposed on the inclined surface 10d on the drive shaft side.

  Further, as shown in FIG. 5C, the suction port 12 is disposed on the distal end side of the main body 10, and the discharge port 14 connected to the suction port 12 is disposed on the inclined surface 10d on the drive shaft side. Also good. Although not shown, the suction port 12 may be disposed on the drive shaft side, and the discharge port 14 connected to the suction port 12 may be disposed on the inclined surface 10b on the distal end side.

  Further, as shown in FIG. 5A, the suction port 12 disposed on the distal end side of the main body 10, the discharge port 14 disposed on the inclined surface 10 d on the drive shaft connected to the suction port 12, and the main body 10 The suction port 12 disposed on the drive shaft side and the discharge port 14 disposed on the inclined surface 10b on the distal end side connected to the suction port 12 may be alternately provided.

  Further, as shown in FIG. 5B, by dividing the flow passage 16 in the middle, the suction port 12 disposed on the distal end side of the main body 10 and the discharge port disposed on the inclined surface 10b on the distal end side. 14 and the discharge port 14 arranged on the inclined surface 10d on the drive shaft side may be connected. In this case, although not shown, the suction port 12 disposed on the drive shaft side, the discharge port 14 disposed on the inclined surface 10b on the distal end side, and the discharge port 14 disposed on the inclined surface 10d on the drive shaft side. You may make it connect both.

  Further, as shown in FIG. 3C, the suction port 12 disposed on the distal end side of the main body 10 and the suction port 12 disposed on the drive shaft side, and the discharge port disposed on the inclined surface 10b on the distal end side. 14 and the discharge port 14 arranged on the inclined surface 10d on the drive shaft side may be connected.

  As described above, by appropriately arranging the suction port 12 and the discharge port 14 and appropriately connecting the two, it is possible to generate an appropriate flow according to the application and perform efficient stirring.

  6A to 6C are front views illustrating examples of other shapes of the main body 10. The main body 10 may be configured in a shape having an inclined surface such as a cone or a truncated cone, or may be configured in a shape combining a cone or a truncated cone and another solid such as a cylinder or a hemisphere.

  FIG. 2A shows an example in which the main body 10 is configured in a truncated cone shape. In this example, the suction port 12 is disposed on the bottom surface 10e (a plane opposite to the connection portion 18), but the suction port 12 may be disposed on the inclined surface 10b.

  FIG. 2B shows an example in which the main body 10 is configured in a shape combining a cone and a cylinder. In this example, the discharge port 14 is disposed across the inclined surface 10b of the conical portion on the distal end side and the side surface 10f (surface parallel to the central axis C) of the cylindrical portion on the drive shaft side. Thus, when the inclined surface 10b is provided adjacent to the side surface 10f parallel to the central axis C, the discharge port 14 may be arranged so that only a part of the discharge port 14 is positioned on the inclined surface 10b. Good.

  Even if the discharge port 14 is arranged in this way, a difference occurs in the peripheral speed and centrifugal force between the distal end side of the discharge port 14 and the drive shaft side, and the discharge port 14 can be brought closer to the peeling point 10c. The effect demonstrated in FIG. 2 can be show | played. In this case, the discharge port 14 may be formed in a long hole so that a part of the discharge port 14 enters the inclined surface 10b from the side surface 10f parallel to the central axis C.

  FIG. 2C shows an example in which the main body 10 is configured in a shape combining two truncated cones. In this example, as in the case where the main body 10 is formed in a spherical shape, two inclined surfaces, that is, an inclined surface 10b on the tip end side and an inclined surface 10d on the drive shaft side are formed. Therefore, it is possible to perform efficient stirring by arranging the suction port 12 and the discharge port 14 as appropriate and connecting them appropriately.

  Various shapes can be adopted as the shape of the main body 10 in addition to the shapes shown above. For example, the shape shown above is a shape whose cross section perpendicular to the rotation axis (center axis C) is circular, but the shape of the main body 10 is not limited to this, and a polygonal pyramid, a polygonal frustum, etc. The cross section perpendicular to the rotation axis may be a polygonal shape, or a shape including a portion where the cross section perpendicular to the rotation axis is a polygon by combining various types of solids such as a polygonal column or a polygonal pyramid. May be. Further, a plurality of convex portions and concave portions may be provided on the surface of the main body 10.

  In this way, by configuring the main body 10 in a shape having appropriate irregularities, it becomes possible to generate an appropriate vortex around the stirring rotating body 1, thereby further improving the stirring force. There are cases where it is possible. Furthermore, in addition to the setting of the shape of the main body 10, the flow around the stirring rotor 1 may be controlled more precisely by appropriately setting the roughness of the surface of the main body 10 and finer uneven shapes. Good. In addition, various colors may be applied to the surface of the main body 10 to improve the design.

  Further, a guiding member for guiding the flow (jet flow) from the discharge port 14 in a predetermined direction may be provided in the main body 10. 7A to 7C are front views illustrating an example in which the guide member 19 is provided on the main body 10.

  FIG. 4A is a view showing an example in which a hood-like guide member 19 that protrudes in the centrifugal direction from the drive shaft side of the discharge port 14 in the main body 10 and is bent toward the distal end side is provided. In this example, since the guide member 19 is configured to bend toward the distal end side, the flow ejected from the discharge port 14 is guided to the guide member 19 as shown in FIG. The flow direction is converted toward the tip side.

  Thus, by providing the guide member 19 configured in an appropriate shape in the vicinity of the discharge port 14 of the main body 10, the flow direction of the flow ejected from the discharge port 14 can be appropriately controlled. That is, since the flow generated around the stirring rotator 1 can be controlled to a desired state by the stirring rotator 1, more efficient stirring can be performed.

  FIG. 5B shows an example in which a hood-like guide member 19 that protrudes in the centrifugal direction from the distal end side of the discharge port 14 in the main body 10 and is bent toward the drive shaft side is provided. As described above, the guide member 19 that guides the jet flow from the discharge port 14 toward the drive shaft may be provided.

  FIG. 6 (c) guides the discharge port 14 of the inclined surface 10b on the tip side toward the tip side, and directs the jet from the discharge port 14 of the inclined surface 10d on the drive shaft side toward the drive shaft side. The example which provided the guide member 19 to guide is shown. As described above, the guide member 19 that guides the jet flow from the discharge port 14 to both the front end side and the drive shaft side may be provided.

  Further, in the example shown in FIG. 3C, a guide member 19 that guides the jet toward the tip side and a guide member 19 that guides the jet toward the drive shaft may be provided separately. Further, by providing only one of the guide member 19 that guides the jet to the tip side or the guide member 19 that guides the jet to the drive shaft side, the jet from the discharge port 14 of the inclined surface 10b on the tip side, or Only one of the jets from the discharge port 14 of the inclined surface 10d on the drive shaft side may be guided.

  The shape of the guide member 19 is not limited to the shape shown in FIGS. 5A to 5C, and any shape can be used as long as the jet flow from the discharge port 14 can be guided in a predetermined direction. It may be a simple shape. For example, instead of the hood-shaped guide member 19 that extends over the entire circumference of the main body 10 shown in FIGS. 10A to 10C, the guide member 19 may be partially provided in the vicinity of the discharge port 14. In addition, the guide member 19 may be configured to guide only the jet flow from some of the discharge ports 14, or the guide member 19 may be configured so that the guide direction changes alternately.

  The guide member 19 may be formed integrally with the main body 10, or the guide member 19 formed separately from the main body 10 is fixed to the main body 10 by a known method such as a screw or an adhesive. You may make it do. When the guide member 19 is provided, the discharge port 14 may be provided on a surface other than the inclined surfaces 10b and 10d, for example, on a side surface parallel to the central axis C.

  FIGS. 8A to 8C are front views showing an example in which a plurality of suction ports 12 are connected to one discharge port 14. In FIG. 6A, in the main body 10 configured in a hemispherical shape, each of the suction port 12 provided on the distal end side (inclined surface 10b) and the suction port 12 provided on the drive shaft side (upper surface 10a) has one discharge port 14. The example which formed the flow path 16 so that it may connect to is shown. In this example, the two suction ports 12 are offset from each other so that the suction port 12 on the drive shaft side is located on the outer side in the centrifugal direction from the rotation shaft (center axis C) than the suction port 12 on the distal end side. is doing.

  As described above, when the flow passages 16 are joined from the plurality of suction ports 12 to be connected to the single discharge port 14, the agitated object that is completely separated, such as a mixture of water and oil, is stirred. It is effective when it is dispersed and emulsified. In particular, by arranging the plurality of suction ports 12 connected to one discharge port 14 such that the distances in the centrifugal direction from the rotation axis (center axis C) are different (offset), the two suction ports 12 Since the suction force can be varied, more complex flow can be generated to efficiently disperse and emulsify.

  FIG. 6B shows a spherical main body 10 in which the tip side suction port 12 and the drive shaft side suction port 12 are connected to one discharge port 14 and the tip side suction port 12 is driven. An example is shown in which it is arranged so as to be located on the outer side in the centrifugal direction from the central axis C than the suction port 12 on the shaft side. As described above, the suction port 12 on the distal end side may be arranged on the outer side in the centrifugal direction than the suction port 12 on the drive shaft side. That is, which of the suction port 12 on the distal end side and the suction port 12 on the drive shaft side is arranged on the outer side in the centrifugal direction can be appropriately determined according to the use or the like.

  In the example shown in FIG. 5B, by rotating the main body 10 with the suction port 12 on the drive shaft side exposed to the outside of the object to be stirred, the gas or the like outside the object to be stirred is moved to the drive shaft side. Since suction can be performed from the suction port 12, it is possible to dissolve gas in the object to be stirred, or to bubble by mixing bubbles.

  FIG. 6C shows an example in which a flow passage 16 is formed in the main body 10 configured in a truncated cone shape so that two suction ports 12 provided on the distal end side (bottom surface 10e) are connected to one discharge port 14, respectively. Show. As described above, depending on applications and the like, a plurality of suction ports 12 connected to one discharge port 14 may be provided only on the distal end side (or drive shaft side).

  In addition, as shown to the same figure (a)-(c), also when connecting the some inlet 12 with respect to the one outlet 14, the shape of the main body 10 is not specifically limited, An appropriate shape according to the above can be adopted. Needless to say, three or more suction ports 12 may be connected to one discharge port 14. When a plurality of suction ports 12 are connected to one discharge port 14, the discharge ports 14 may be provided on a surface other than the inclined surfaces 10b and 10d, for example, a side surface parallel to the central axis C.

  9A to 9C are partial cross-sectional views illustrating an example in which a shaft portion flow passage 22 is provided in the drive shaft 20 connected to the main body 10. In this example, for example, as shown in FIG. 5A, a shaft portion flow passage 22 extending in the axial direction is formed inside a drive shaft 20 that rotationally drives the main body 10. A connection port 24 that is an opening for connecting the shaft portion flow passage 22 to the flow passage 16 is provided at the tip of the drive shaft 20, and the shaft portion flow passage 22 is provided at a predetermined position on the side surface of the drive shaft 20. An external opening 26 that is an opening for connecting to the outside of the object to be stirred 50 is provided.

  In addition, a common space 16a that is a space connected to all the flow passages 16 is formed in the central portion of the main body 10, and a connection port 24 at the tip of the drive shaft 20 is opened in the common space 16a. . That is, the connecting portion 18 is configured to connect the shaft portion flow passage 22 of the drive shaft 20 to the common space 16a, and the shaft portion flow passage 22 is connected to all the flow passages via the connection port 24 and the common space 16a. 16 is connected.

  As described above, the shaft portion flow passage 22 is provided in the drive shaft 20, one end (connection port 24) of the shaft portion flow passage 22 is connected to the flow passage, and the other end (external opening 26) is connected to the outside of the object to be stirred 50. By connecting them, it becomes possible to efficiently suck the gas or the like outside the object to be stirred 50 into the flow passage 16. Specifically, by using the negative pressure generated in the common space 16a in the central portion due to the flow in the flow passage 16 toward the outside in the centrifugal direction, the gas in the shaft portion flow passage 22 is strongly sucked. be able to. Furthermore, since external gas etc. are divided | segmented into fine bubbles by the turbulent flow which generate | occur | produces by negative-pressure attraction | suction, not only can it melt | dissolve and foam in the to-be-stirred object 50 efficiently, but to-be-stirred It is also possible to generate microbubbles in 50.

  When the shaft flow passage 22 is provided in this way, it is possible to mix another liquid into the stirred object 50 by opening the external opening 26 in a liquid different from the stirred object 50. It becomes. That is, according to the rotating body 1 for stirring provided with the shaft portion flow passage 22 in the drive shaft 20, two-liquid mixing can be performed very efficiently. If solids such as powder and granules are introduced from the external opening 26 together with liquid or gas, the solids such as powder can be efficiently dispersed in the object to be stirred 50. Accordingly, for example, in an aquaculture farm or the like, it is possible to perform an operation of dissolving oxygen in water and supplying food.

  FIG. 2B shows an example in which a supply device 60 for supplying a fluid such as gas or liquid, or a mixture of fluid and solid is connected to the shaft flow passage 22. In this example, the supply device 60 is a pump or a compressor, for example, and is connected to the external opening 26 via a supply pipe 62 and a rotary joint 64.

  In this way, by connecting the supply device 60 to the shaft portion flow passage 22, gas or liquid, or a mixture of these with a solid such as powder or granules can be pumped into the flow passage 16. Mixing and dispersion can be performed very quickly. Further, by controlling the supply amount from the supply device 60, the degree of mixing, the size of bubbles to be mixed, and the like can be appropriately adjusted.

  FIG. 6C is a view showing an example in which the external opening 26 is opened in the object to be stirred 50. In this example, the object to be stirred 50 is strongly sucked into the flow passage 16 from the external opening 26 through the shaft portion flow passage 22, so that gas such as air staying in the flow passage 16 can be quickly discharged. 14 can be discharged. Accordingly, in combination with the effect of disposing at least a part of the discharge port 14 on the inclined surface 10b, gas such as air in the flow passage 16 can be immediately discharged, so that the viscosity of the object to be stirred 50 is increased. Regardless of this, stirring can be performed very efficiently.

  In the example shown in FIG. 5C, the suction port 12 is provided in the connection portion 18 of the main body 10 (or the connection portion 18 functions as the suction port 12), and the shaft portion is connected to the suction port 12 of the connection portion 18. It can also be considered that the flow path 22 is connected. Therefore, in some cases, only the suction port 12 of the connection portion 18 connected to the shaft portion flow passage 22 may be provided in the main body 10. That is, the shaft portion flow passage 22 may be connected to the flow passage 16 via the suction port 12.

  In the example shown in FIGS. 5A to 5C, the external opening 26 is provided on the side surface of the drive shaft 20. However, the position of the external opening 26 is not limited to this, and for example, driving The shaft 20 may be configured in a pipe shape, and an external opening 26 may be provided at the end opposite to the connection port 24. In this case, an opening may be provided in the coupling that connects the drive shaft 20 and the drive device 30, or the shaft center of the drive device 30 may be shifted with respect to the drive shaft 20 using a gear or the like. Further, the shaft of the drive device 30 may be hollow and connected to the shaft portion flow passage 22, or the shaft portion flow passage 22, the connection port 24, and the external opening 26 may be provided on the shaft of the drive device 30 to drive the drive shaft 20. As such, it may be directly connected to the main body 10.

  Further, in the present embodiment, the shaft portion flow passages 22 are connected to all the flow passages 16, but the shaft portion flow passages 22 may be connected to only some of the flow passages 16. That is, the common space 16a connected only to a part of the flow passages 16 may be formed, and the shaft portion flow passages 22 may be connected thereto.

  Further, when the shaft portion flow passage 22 connected to the flow passage 16 is provided in the drive shaft 20 as described above, the shape of the main body 10 is not particularly limited, and an appropriate shape according to the application or the like is adopted. be able to. Further, the arrangement and configuration of the suction port 12, the discharge port 14, and the flow passage 16 are not particularly limited, and for example, one suction port 12 provided at the center of the front end of the main body 10 and a plurality of discharge ports 14 are connected. It may be. When the shaft portion flow passage 22 connected to the flow passage 16 is provided in the drive shaft 20, the discharge port 14 may be provided on a surface other than the inclined surfaces 10b and 10d, for example, a side surface parallel to the central axis C. .

  FIGS. 10A to 10D are cross-sectional views showing examples of other forms of the connection port 24. By appropriately adjusting the arrangement and shape of the connection port 24, it is possible to adjust the degree of mixing of an external fluid, a solid, or the like in the object to be stirred, the state of generation of bubbles, and the like.

  FIG. 4A shows an example in which the tip of the drive shaft 20 is not protruded into the common space 16a. Thus, by adjusting the protruding amount of the tip of the drive shaft 20 provided with the connection port 24, the degree of mixing, the generation state of bubbles, and the like can be adjusted. FIG. 5B shows an example in which the size of the connection port 24 provided at the tip of the drive shaft 20 is reduced. As described above, the degree of mixing, the generation state of bubbles, and the like can also be adjusted by adjusting the size of the connection port 24.

  FIGS. 3C and 3D show an example in which the front end of the drive shaft 20 is abutted against the inner wall of the common space 16 a and a connection port 24 is provided on the side surface of the drive shaft 20. Instead of opening in the axial direction in this way, a connection port 24 opening in the centrifugal direction may be provided. In this case, not only the size of the connection port 24 but also the number and arrangement of the connection port 24 are appropriately set, so that a desired mixing degree and bubble generation state can be obtained.

  The shape of the connection port 24 is not particularly limited, and various shapes such as a rectangular shape and a slit shape can be adopted in addition to the circular shape. Further, a mesh member may be provided at the connection port 24.

  Next, a stirring device 2 configured by connecting a plurality of stirring rotors 1 will be described. FIG. 11 is a front view showing an example of the stirring device 2, and shows an example in which three stirring rotators 1 are connected via a drive shaft 20. As described above, the stirring ability can be further improved by connecting the plurality of stirring rotating bodies 1 in the direction of the rotation axis. In particular, it is effective when the depth of the fluid to be stirred is deep.

  As described above, the stirring rotator 1 according to this embodiment includes the main body 10 that rotates about the rotation axis (center axis C), the suction port 12 provided on the surface of the main body 10, and the surface of the main body 10. The main body 10 has inclined surfaces 10b and 10d that gradually move away from the rotation axis from one side to the other in the rotation axis direction. The suction port 12 is disposed at a position closer to the rotation axis than the discharge port 14, and the discharge port 14 is disposed at a position on the outer side in the centrifugal direction from the rotation shaft than the suction port 12, and at least a part thereof is inclined. Located on the surfaces 10b, 10d.

  With this configuration, even when a highly viscous fluid is stirred, a gas such as air staying in the flow passage 16 can be quickly discharged from the flow passage 16. Thereby, it is possible to prevent the gas from staying in the flow passage 16 and reduce the stirring force, and it is possible to perform quick and efficient stirring regardless of the viscosity of the object to be stirred.

  Further, the flow in the vicinity of the surface of the main body 10 is smoothly accompanied by the jet flow from the discharge port 14 by the inclined surfaces 10b and 10d, the difference between the peripheral speed and the centrifugal force at the discharge port 14, and the negative pressure at the separation point 10c. And synergistically act, it is possible to generate a stronger and more complicated flow in the stirring object. As a result, it is possible to obtain a high stirring force that has not been obtained conventionally.

  The main body 10 has a circular cross section perpendicular to the rotation axis. For this reason, the reaction at the start of rotation can be eliminated, and the container or the rotating body for stirring 1 can be made less likely to be damaged or scraped when hit against a container or the like containing the object to be stirred. Furthermore, since the occurrence of unbalance with respect to the rotating shaft can be reduced, vibrations and whirling during rotation can be substantially eliminated. As a result, it is possible to perform safe and efficient stirring regardless of the application.

  The main body 10 is configured to be hemispherical or spherical. For this reason, while being able to generate a strong flow in a to-be-stirred object, for example, the suction port 12 can be brought close to a narrow part such as a corner part of a container, and a staying thing can be sucked. That is, it is possible to sufficiently stir all the corners of the container.

  Further, when the main body 10 is formed in a spherical shape, an inclined surface 10d on the drive shaft side can be provided in addition to the inclined surface 10b on the distal end side, and therefore the discharge ports 14 are appropriately arranged on these two inclined surfaces 10b and 10d. By doing so, it is possible to generate an appropriate flow according to the application and perform efficient stirring. The main body 10 may be configured in an ellipsoidal shape or a semi-ellipsoidal shape.

  Further, a plurality of discharge ports 14 are provided, and the suction port 12 and the flow passage 16 are individually provided for each of the plurality of discharge ports 14. For this reason, it becomes possible to maintain the flow velocity in the flow passage 16 at an appropriately high speed, and it is possible to prevent the stagnant material from accumulating in the flow passage 16 and lowering the stirring ability.

  The suction port 12 is provided on the opposite side of the drive shaft 20 connected to the main body 10 for rotating the main body 10. As a result, the accumulated matter at the bottom of the container can be sucked up, so that uniform stirring without unevenness can be performed. Moreover, stirring can be performed without disturbing the liquid level of the object to be stirred.

  The suction port 12 is provided on the outer side in the centrifugal direction of the rotating shaft. For this reason, it is possible to provide a portion protruding from the suction port 12 at the center of the front end side of the main body 10. By doing so, even when the stirring rotator 1 is brought close to the wall surface of the container, it is possible to avoid a situation in which the stirring rotator 1 is attracted to the wall surface and the suction port 12 is blocked. . Thereby, stable stirring can be performed even when the rotating body 1 for stirring is manually operated.

  Further, the stirring rotator 1 may include a guide member 19 that guides the flow from the discharge port 14 in a predetermined direction. In this case, it is possible to appropriately control the flow state around the rotating body for stirring 1 by changing the flow direction of the ejection from the discharge port 14 to an appropriate direction, so that more efficient stirring can be performed. it can.

  The flow passage 16 is configured to connect one discharge port 14 and a plurality of suction ports 12, and the plurality of suction ports 12 connected to one discharge port 14 have different distances in the centrifugal direction from the rotation shaft. You may make it arrange | position. In this case, since a more complicated flow can be generated due to the difference in centrifugal force acting on the plurality of inlets 12, for example, a mixture of water and oil can be efficiently dispersed and emulsified.

  The main body 10 is connected to a drive shaft 20 that rotates the main body 10, and the drive shaft 20 includes a shaft portion flow passage 22 that connects an opening (external opening 26) provided in the main body 10 and the flow passage 16. May be. In this case, gas, liquid, etc. outside the object to be stirred can be strongly sucked into the flow path 16, so that not only stirring but also mixing of a plurality of substances, dissolution of gas in the liquid, foaming, and powder It is possible to efficiently disperse solids such as particles and granules. It is also possible to generate microbubbles in the liquid.

  Further, a supply device 60 for supplying a fluid or a mixture of fluid and solid to the flow passage 16 may be connected to the shaft flow passage 22 via the shaft flow passage 22. In this case, gas, liquid, or a mixture of these and powder or granules can be pumped into the flow passage 16 to perform various mixing and dispersion extremely efficiently. In addition, by controlling the supply device 60, it is possible to appropriately adjust the degree of mixing, the degree of dispersion, the degree of foaming, and the like.

  Further, the stirring device 2 according to the present embodiment is configured by arranging a plurality of stirring rotating bodies 1 in the rotation axis direction. For this reason, the stirring ability can be further increased.

  Although the embodiment of the present invention has been described above, the stirring rotating body and the stirring device of the present invention are not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. Of course, can be added.

  The stirring rotating body and the stirring device of the present invention can be used in the field of stirring of various fluids or mixing of bubbles.

DESCRIPTION OF SYMBOLS 1 Rotating body for stirring 2 Stirrer 10 Main body 10b, 10d Inclined surface 12 Suction port 13 Suction port 14 Discharge port 16 Flow path 19 Guide member 20 Drive shaft 22 Shaft flow path 26 External opening 60 Supply device C Center shaft

Claims (12)

A main body that rotates about a rotation axis;
An inlet provided on the surface of the body;
A discharge port provided on the surface of the main body;
A flow path connecting the suction port and the discharge port,
The main body has an inclined surface that gradually moves away from the rotation axis from one to the other in the rotation axis direction,
The suction port is disposed at a position closer to the rotation shaft than the discharge port,
The discharge port is disposed at a position on the outer side in the centrifugal direction from the rotation shaft than the suction port, and at least a part thereof is positioned on the inclined surface.
Rotating body for stirring. The main body has a circular cross section perpendicular to the rotation axis,
The rotating body for stirring according to claim 1. The main body is hemispherical or semi-ellipsoidal,
The rotating body for stirring according to claim 1 or 2. The main body is spherical or ellipsoidal,
The rotating body for stirring according to claim 1 or 2. A plurality of the discharge ports are provided,
The suction port and the flow passage are individually provided for each of the plurality of discharge ports,
The rotating body for stirring according to any one of claims 1 to 4. The suction port is provided on the opposite side of a drive shaft connected to the main body for rotating the main body,
The rotating body for stirring according to any one of claims 1 to 5. The suction port is provided on the outer side in the centrifugal direction of the rotating shaft,
The rotating body for stirring according to any one of claims 1 to 6. It further comprises a guide member that guides the flow from the discharge port in a predetermined direction,
The rotating body for stirring according to any one of claims 1 to 7. The flow passage is configured to connect one discharge port and a plurality of the suction ports,
The plurality of suction ports connected to one discharge port are arranged such that distances in the centrifugal direction from the rotation shaft are different from each other,
The rotating body for stirring according to any one of claims 1 to 8. A drive shaft that rotates the main body is connected to the main body,
The drive shaft is provided with a shaft portion flow passage that connects an opening provided in the drive shaft and the flow passage,
The rotating body for stirring according to any one of claims 1 to 9. A supply device for supplying a fluid or a mixture of fluid and solid to the flow passage is connected to the shaft flow passage through the shaft flow passage.
The rotating body for stirring according to claim 10. A plurality of the stirring rotators according to any one of claims 1 to 11 are arranged in the direction of the rotation axis.
Stirring device.

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