JP2019188267A - Agitating blade, agitator, and agitation method - Google Patents

Abstract

To provide an agitating blade which can highly agitate a fluid, an agitator, and an agitation method.SOLUTION: An agitating blade 2 has a blade body 20 which is connected to a rotary shaft 51, and comprises inlets 20α1, 20α2 and an outlet 20β for a fluid A. A flow channel, which connects the inlets 20α1, 20α2 and the outlet 20β to each other, is provided in the blade body 20. The inlets 20α1, 20α2 are located at a position on a rotation axis of the rotary shaft 51 or a position near the rotation axis, and the outlet 20β is located on an outer side with respect to the inlets 20α1, 20α2. A nozzle (6, 8) for sucking the fluid A is provided at the inlet 20α2 (20α1).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stirring blade, a stirring device, and a stirring method capable of highly stirring a fluid.

  As a conventional stirring device, for example, Patent Document 1 discloses a stirring device in which a propeller-like stirring blade is provided on a stirring shaft and a plate-like auxiliary blade is provided below the stirring blade. In this stirrer, when only one auxiliary blade is provided, or when a plurality of auxiliary blades are provided, at least one auxiliary blade is disposed with the central angle shifted from an equiangular position, or more than other auxiliary blades. By making it short, etc., the low speed region formed at the bottom of the stirring tank does not stay in the same region, and the sticking of the object to be stirred to the bottom of the stirring tank is suppressed.

  Further, Patent Document 2 includes a wing part integrally provided at the lower end of the shaft part, and the wing part includes a disk-like support part and a convex body part formed in a cross shape on the upper surface of the support part. A vent passage for passing gas from the shaft portion to the wing portion is formed, a gas supply means for supplying gas to the vent passage is connected to the shaft portion, and the gas is placed in the liquid on the upper surface of the convex body portion An agitation device in which a plurality of air outlets are formed is disclosed. In this stirrer, the convex main body portion has a front surface in the rotation direction that is inclined from the lower side to the upper side and is inclined rearward in the rotation direction, thereby smoothing the liquid flow when the wing portion is rotated. The shear stress generated in the wing portion can be lowered, and the bubbles can be uniformly dispersed with a low shear stress.

Japanese Patent Laid-Open No. 2006-144771 JP 2013-63362 A

  In the stirrers described in Patent Documents 1 and 2, the blades that stir the fluid simply stir the fluid and cannot stir the fluid to a high degree.

  Moreover, in the stirring apparatus described in Patent Document 1, although the position of the low speed region at the bottom of the stirring tank can be shifted from the center by the auxiliary blade, the particles are easily collected in the low speed region, and the plate-like auxiliary With blades and propeller-shaped stirring blades, it is difficult to stir particles that accumulate in the low-speed region into a liquid and to stir them to a high degree.

  In the stirring apparatus described in Patent Document 2, only gas is blown out from the outlet of the main body into the liquid, and it is difficult to highly stir the gas into the liquid. In addition, gas supply means for blowing gas from a plurality of small-diameter outlets is required, and energy in the gas supply means is required in addition to rotating the wings, and the cost of the apparatus is high.

  The present invention has been made in view of the above circumstances, and is capable of highly stirring a fluid, for example, promoting the winding of particles into a liquid and the dispersion of a gas into the liquid. An object is to provide a stirring blade, a stirring device, and a stirring method.

The present invention
A wing body connected to a rotating shaft and provided with a fluid inlet and outlet;
Inside the wing body, a flow path connecting the suction port and the discharge port is provided,
The suction port is disposed at a position on the rotation axis of the rotation shaft or a position close to the rotation axis,
The discharge port is disposed at a position outside the suction port,
The suction port is a stirring blade provided with a nozzle for sucking fluid.

  With the above configuration, when the stirring blade is rotated, the fluid inside the blade body flows out from the discharge port vigorously by the centrifugal force of rotation, thereby generating a suction force from the flow path inside the blade body to the suction port. Then, the fluid outside the wing body is strongly sucked into the wing body from the suction port of the wing body. In this case, the suction of fluid into the wing body can be promoted by disposing the nozzle at the suction port. For example, particles settled at the bottom of the stirring tank can be wound up by the nozzle and sufficiently sucked into the blade body from the suction port, and the gas on the liquid level can be sucked by the nozzle and sufficiently sucked into the blade body from the suction port. Can inhale. Further, the fluid in the outer peripheral portion of the stirring blade is disturbed by collision with the fluid that flows out from the discharge port vigorously, and is remarkably stirred together with the fluid that flows out from the discharge port. In this way, the desired fluid can be sufficiently sucked into the wing body from the suction port, and can be circulated through the flow path inside the wing body to flow out from the discharge port. . Therefore, the entire fluid can be stirred to a high degree, and the entire fluid such as in the stirring tank can be stirred in a relatively short time.

  Moreover, this invention can be made into the stirring apparatus by which the said stirring blade is arrange | positioned in the fluid in a stirring tank.

Further, the present invention is a stirring method of stirring fluid by the stirring blade or the stirring device,
The agitating blade causes the suction blade to generate a suction force by causing the fluid inside the blade body to flow out from the discharge port to the outside of the blade body by rotating the stirring blade, and sucks the external fluid from the suction port and flows into the blade body. It can be a method.

In addition, the present invention is a method for stirring fluid containing particles in a liquid by a stirring blade that rotates about a rotation axis.
The stirring blade is constituted by a laminate in which a plurality of mixing elements are stacked in the rotation axis direction, and is supported by a rotation shaft connected to an upper portion of the stirring blade,
The mixing element has a plurality of first through holes and a second through hole larger than the first through hole,
In the stirring blade, the mixing element is arranged such that a part or all of the first through hole overlaps the first through hole of the adjacent mixing element, and the first through hole of the adjacent mixing element The fluid discharge port is formed by the plurality of first through holes that are arranged so as to circulate fluid between them and to divide the fluid in the extending direction of the mixing element and open to the outer periphery of the stirring blade In addition, the second through hole communicates in the stacking direction to form a fluid suction port on the upper and lower surfaces of the stirring blade and to form a hollow portion for allowing fluid to flow into the blade body. And a holding plate having an opening having a smaller diameter than the lower suction port is disposed on the lower surface of the stirring blade,
The agitating blade rotates to cause the fluid inside the blade body to flow out from the discharge port to the outside of the blade body, thereby generating a suction force at each of the suction ports, and entraining the particles from the suction port on the lower surface into the hollow portion. It can be set as the stirring method which suck | inhales a fluid and makes the fluid containing particle | grains flow in the said stirring blade from the said hollow part.

Further, the present invention is a stirring method for dispersing gas in a liquid by a stirring blade that rotates about a rotation axis.
The stirring blade is constituted by a laminate in which a plurality of mixing elements are stacked in the direction of the rotation axis, and is supported by a rotation shaft connected to a lower portion of the stirring blade,
The mixing element has a plurality of first through holes and a second through hole larger than the first through hole,
In the stirring blade, the mixing element is arranged such that a part or all of the first through hole overlaps the first through hole of the adjacent mixing element, and the first through hole of the adjacent mixing element The fluid discharge port is formed by the plurality of first through holes that are arranged so as to circulate fluid between them and to divide the fluid in the extending direction of the mixing element and open to the outer periphery of the stirring blade In addition, the second through hole communicates in the stacking direction to form a fluid suction port on the upper and lower surfaces of the stirring blade and to form a hollow portion for allowing fluid to flow into the blade body. ,
The rotating operation of the stirring blade causes a fluid inside the blade body to flow out from the discharge port to the outside of the blade body, thereby generating a suction force at each suction port, and sucking a gas from the suction port on the upper surface into the hollow portion, It can also be set as the stirring method which flows the fluid containing a liquid and gas into the inside of the said stirring blade from a hollow part.

  According to the present invention, the entire fluid can be highly agitated by sufficiently sucking the desired fluid from the suction port, allowing it to flow through the flow path in the blade body and outflow from the discharge port, and compare the entire fluid. It can be stirred in a short time.

It is a cross-sectional schematic diagram which shows a stirring apparatus provided with the stirring blade of Embodiment 1. FIG. It is sectional drawing (FIG. 2 (a)) and top view (FIG.2 (b)) which show the flow state of the fluid inside the wing | blade main body in Embodiment 1. FIG. It is a top view which shows the axis | shaft holder plate (FIG. 3 (a)) and nozzle holding plate (FIG.3 (b)) attached to a wing | blade main body. It is a top view which shows the mixing element which comprises a wing | blade main body. FIG. 6 is a plan view showing a shaft holder plate as a first modification of the first embodiment. It is a cross-sectional schematic diagram which shows a suction tube as the modification 2 of Embodiment 1. FIG. It is a perspective view which shows the ring assembly material which comprises a mixing element as the modification 3 of Embodiment 1. FIG. It is a top view which shows two ring materials which comprise a ring assembly material. It is the longitudinal cross-sectional view (same figure (a)) and cross-sectional view (same figure (b)) which show the stirring blade provided with the wing | blade main body comprised with one member as the modification 4 of Embodiment 1. FIG. It is a cross-sectional schematic diagram which shows the stirring blade which does not have a suction pipe as the modification 5 of Embodiment 1. FIG. It is a cross-sectional schematic diagram which shows the stirring apparatus provided with the stirring blade of Embodiment 2. FIG. 6 is a cross-sectional view showing a gas introduction pipe as a first modification of the second embodiment. FIG. 10 is a perspective view showing a gas introduction pipe as a second modification of the second embodiment. It is a cross-sectional schematic diagram which shows a blade member as the modification 3 of Embodiment 2. FIG. It is a cross-sectional schematic diagram which shows the stirring blade which does not have a gas inlet tube as the modification 4 of Embodiment 2. FIG.

Embodiments of the present invention will be described below with reference to the drawings.
In the present specification, the “stacking direction” is synonymous with the rotating shaft direction and the vertical direction of the stirring blade 2, and the “extending direction” is the direction intersecting the stacking direction, the radial direction of the mixing element 21, Synonymous with circumferential direction and the like.

(1) Embodiment 1
A stirrer 1A shown in FIG. 1 includes a stirrer 5 that contains a fluid A and a stirrer blade 2A of the first embodiment that is disposed in the fluid A in the stirrer 5. Stirrer 1A can be used, for example, to stir fluid A containing particles B in a liquid.

  The agitating blade 2A of the first embodiment is composed of a blade body 20 having suction ports 20α1, 20α2 and a discharge port 20β for the fluid A with reference to FIG. The wing body 20 has a substantially cylindrical shape, and suction ports 20α1 and 20α2 are provided at the center portions of the upper surface and the lower surface, and a large number of discharge ports 20β are provided on the outer peripheral surface. Inside the blade body 20, a fluid A flow path (22) connecting the suction port 20 α and the discharge port 20 β is provided. A cylindrical suction pipe 6 is connected to a suction port 20α2 on the lower surface of the wing body 20 as a nozzle for sucking the fluid A. Further, the lower end of the rotating shaft 51 is connected to the center position of the upper surface of the blade body 20. An electric motor M capable of arbitrarily controlling the number of rotations is connected to the upper end of the rotating shaft 51, and the blade body 20 agitates the fluid A by rotating around the rotating axis of the rotating shaft 51. . The power source for rotating the wing body 20 is not limited to the electric motor (drive unit) M, and can be arbitrarily selected from those that exhibit rotational motion.

  As shown in FIG. 2, the wing body 20 is configured by a laminate in which a plurality of substantially disc-shaped mixing elements 21 (21a, 21b) are stacked. A shaft holder plate 3 is disposed on the upper surface of the laminate, and a nozzle holding plate 4 is disposed on the lower surface. As shown in FIG. 3, the shaft holder plate 3 and the nozzle holding plate 4 are formed of a disc having an outer diameter substantially the same as that of the mixing element 21. The shaft holder plate 3 has a mounting portion 32 of the rotating shaft 51 in the center, and a fan-shaped small opening 31 for partially exposing the suction port 20α1 on the upper portion of the wing body 20 around the mounting portion 32. Are provided. The nozzle holding plate 4 is provided with a circular opening 41 at the center for exposing the suction port 20α2 at the lower portion of the blade body 20 as a whole. The suction tube 6 is disposed in the opening 41 of the nozzle holding plate 4 so as to extend below the blade body 20.

  The plurality of mixing elements 21, the shaft holder plate 3, and the nozzle holding plate 4 have bolt holes 25 at two positions 180 ° on the outer peripheral portion, and in the stacking direction through the bolt holes 25 by fixing means for bolts b and nuts n. They are fixed so as to be in close contact (see FIG. 2A). Thereby, the wing | blade main body 20 integrated to the some mixing element 21 so that decomposition | disassembly was possible can be formed easily. In addition, the blade body 20 can easily perform a cleaning operation for removing residues and foreign matters remaining in each mixing element 21 by configuring the plurality of mixing elements 21 so as to be disassembled into individual mixing elements 21. . In addition, as a structure which integrates the some mixing element 21, it is good also as not only the volt | bolt b and the nut n but the attachment structure which can be disassembled like an uneven fitting structure.

  The blade body 20 is configured by alternately stacking two types of mixing elements 21a and 21b shown in FIG. 4, and each of the two types of mixing elements 21a and 21b is a first penetrating in the thickness direction. A plurality of through holes 22 are provided. The plurality of first through holes 22 are provided along an extending surface extending in the extending direction of the substantially disc-shaped mixing element 21. A central portion of the mixing element 21 has a second through hole 23 having an opening area larger than that of the first through hole 22. The second through-hole 23 is formed in a substantially circular shape, and the mixing element 21 is laminated, so that the blade body 20 has a cylindrical hollow portion 24 (with each second through-hole 23 communicated) ( 2) is formed. The openings at the upper end and the lower end of the hollow portion 24 form fluid A suction ports 20α1 and 20α2. The central axis of the hollow portion 24 coincides with the rotation axis of the stirring blade 2A. Accordingly, the suction ports 20α1 and 20α2 are arranged at positions on the rotation axis. The suction ports 20α1 and 20α2 may be provided with openings at arbitrary positions of the shaft holder plate 3 and the nozzle holding plate 4, and may be arranged at positions close to the rotation axis such as adjacent to the rotation axis by the openings. . In addition, a plurality of suction ports 20α may be provided in addition to the upper and lower portions of the wing body 20, respectively.

  Further, the first through hole 22 is formed in a substantially rectangular shape in plan view, and is arranged concentrically around the center point of the second through hole 23. The size of the first through-hole 22 is formed to be approximately the same size in the same circumferential direction of the mixing element 21, and is formed so as to increase toward the outer side in the radial direction of the mixing element 21. The first through holes 22 are arranged in a zigzag pattern, and the arrangement patterns of the first through holes 22 are different in the two types of mixing elements 21a and 21b. In one mixing element 21a, the first through hole 22 is closed on the inner peripheral surface of the second through hole 23 and is open on the outer peripheral surface, whereas the other mixing element 21b is in the first through hole 22. Is open on the inner peripheral surface of the second through-hole 23 and closed on the outer peripheral surface. Each of the first through holes 22 opened on the outer peripheral surface of the mixing element 21a forms a discharge port 20β for the fluid A (see FIG. 2A). Accordingly, the discharge port 20β is disposed at a position outside the rotation axis with respect to the upper and lower suction ports 20α1 and 20α2 above and below the hollow portion 24 (for example, a radially outer position orthogonal to the rotation axis).

  The first through holes 22 of each of the adjacent mixing elements 21 in the blade body 20 are arranged so as to be partially shifted and overlapped in the radial direction and the circumferential direction, and communicate with each other in the stacking direction and the extending direction of the mixing elements 21. Has been. In other words, the partition walls between the first through holes 22 extending in the radial direction and the circumferential direction of the mixing element 21 are arranged at different positions between the adjacent mixing elements 21. Accordingly, the inside of the blade body 20 is configured to sequentially pass the fluid A between the first through holes 22 of the adjacent mixing elements 21 and to divide the mixing element 21 in each of the stacking direction and the extending direction. Yes. Thus, the plurality of first through holes 22 in the blade body 20 form a plurality of “flow paths” that connect the upper and lower suction ports 20α1, 20α2 and the plurality of discharge ports 20β on the outer peripheral surface.

  The mixing element 21, the shaft holder plate 3, and the nozzle holding plate 4 are made of metal, but may be made of resin such as polyethylene, polypropylene, fluorine resin, or ceramic. If the mixing element 21 is made of resin, the mixing element 21 can be easily and inexpensively manufactured by resin molding. In addition, when the mixing element 21, the shaft holder plate 3, and the nozzle holding plate 4 are made of a resin other than the fluorine resin, the surface layer may be formed of a fluorine resin by coating or the like. In this case, the chemical resistance is improved, and it can be preferably used in the field of mixing chemicals and the like.

  With the above configuration, when the agitating blade 2A is rotated by the electric motor M, the fluid A inside the blade body 20 vigorously flows out from the discharge port 20β to the outside due to the centrifugal force of rotation, whereby the flow path inside the blade body 20 A large suction force is generated at the upper and lower suction ports 20α1, 20α2. Then, the fluid A outside the wing body 20 is strongly sucked into the wing body 20 from the upper and lower suction ports 20α1 and 20α2 of the wing body 20. In this case, suction of the fluid A at the bottom of the agitation tank 5 is promoted by the suction pipe 6 at the suction port 20α2 at the lower part of the blade body 20. Therefore, the particles B settled on the bottom of the stirring tank 5 can be wound up by the suction pipe 6 and sufficiently sucked into the blade body 20 from the lower suction port 20α2 (see FIG. 1). The opening 41 of the nozzle holding plate 4 and the suction pipe 6 may be smaller in diameter than the suction port 20α2 at the lower part of the blade body 20. In this case, the flow rate of the suction of the fluid A by the suction pipe 6 can be increased.

  The fluid A sucked from the upper and lower suction ports 20α1 and 20α2 of the wing body 20 flows into the hollow portion 24 and is mixed with each mixing element 21 of the wing body 20 by centrifugal force generated by the rotation of the wing body 20. Flows into the blade body 20 from the first through hole 22. The fluid A that has flowed into the wing body 20 passes through the plurality of first through holes 22 that have become a plurality of flow paths, and circulates substantially radially from the inner peripheral portion toward the outer peripheral portion. The mixing element 21 is divided in the extending direction and merged (see FIG. 2B). The wing body 20 is formed with a plurality of flow paths that also circulate in the stacking direction by the first through holes 22 that communicate with each other in the stacking direction in the stacked mixing elements 21. Accordingly, when the fluid A inside the blade body 20 passes through the first through holes 22, the fluid A also flows in the stacking direction of the mixing elements 21. At this time, the fluid A is also divided in the stacking direction of the mixing elements 21. Are joined together (see FIG. 2 (a)). As described above, the flow of the fluid A inside the blade body 20 is not only repeated in the planar direction, that is, two-dimensional division and merging in the extending direction of the mixing element 21, but also in the stacking direction of the mixing element 21. Splitting and merging are repeated three-dimensionally with a spread. By this three-dimensional flow, the fluid A is highly mixed by repeatedly dividing and joining.

  Further, in the stirring blade 2A of the first embodiment, the central portion of the blade body 20 has a hollow portion 24 communicating with the upper and lower suction ports 20α1, 20α2, and the center line of the hollow portion 24 is the rotation axis of the stirring blade 2A. Match. Therefore, since the flow resistance when the fluid A flows into the hollow portion 24 is very small, the suction ports 20α1 and 20α2 that open above and below the hollow portion 24 by the rotation of the stirring blade 2A have a strong suction force. appear. Since the first through holes 22 of the mixing element 21 at the lowest position are closed by the nozzle holding plate 4, a stronger suction force is generated at the suction port 20 α 2 and the suction pipe 6 on the lower surface of the blade body 20. To do. Accordingly, the particles B accumulated at the bottom of the stirring tank 5 are wound up by the suction pipe 6 and sufficiently sucked into the blade body 20 from the lower suction port 20α2 (see FIG. 1). As described above, the particles B flowing into the wing body 20 are divided by flowing through the respective flow paths by the plurality of first through holes 22 from the inner peripheral portion of the wing main body 20 toward the outer peripheral portion. Highly stirred.

  In this way, the particles B accumulated at the bottom of the stirring tank 5 are wound up through the suction pipe 6 and are sufficiently sucked into the blade body 20 from the lower suction port 20α2 together with the liquid, and at the same time, stirring is performed from the upper suction port 20α1. The fluid A (mainly liquid) above the blade 2A is sufficiently sucked into the blade body 20, and the fluid A sucked into the blade body 20 is circulated through the flow path inside the blade body 20 to be highly mixed. Then, the entire fluid A in the agitation tank 5 is vigorously flowed by vigorously flowing out from the plurality of discharge ports 20β on the outer peripheral portion of the blade body 20. Therefore, the whole fluid A in the stirring tank 5 can be highly stirred, and the whole fluid A can be stirred in a relatively short time.

(Modification 1)
In the first embodiment, the shaft holder plate 3 (see FIG. 3A) is provided with a small opening 31 that partially opens the upper suction port 20α1, but in the first modification, as shown in FIG. The shaft holder plate 3A is made of a plate material that does not have the small opening 31 and blocks the entire upper suction port 20α1 to restrict the inflow of the fluid A from the upper suction port 20α1 to zero. As a result, all the fluid A sucked into the blade body 20 comes from the suction port 20α2 at the lower portion of the blade body 20, so that the suction flow rate of the fluid A from the suction pipe 6 is greatly increased, and the stirring tank 5 The amount of the particles B wound up at the bottom can be further increased.
Note that a plate material provided with a predetermined hole or a plate material not provided with a hole can be used as a limiting plate for restricting the inflow of the fluid A to the shaft holder plate 3 shown in FIG. Here, in the present invention, the concept of restricting the inflow of the fluid A in the restriction plate not only restricts the inflow amount of the fluid A to zero, but also provides a predetermined hole to reduce the inflow amount of the fluid A. The case where it restrict | limits is included.

(Modification 2)
In the first embodiment, the suction pipe 6 (see FIG. 1) is formed with the same outer diameter over the entire length. However, in the second modification, as shown in FIG. The tip portion to be inhaled) has a shape expanded in a trumpet shape. Thereby, the suction area of the particle | grains B of the stirring tank 5 bottom part can be enlarged. Therefore, the particles B that settle on the bottom of the stirring tank 5 can be easily taken up into the blade body 20 by being wound up by the suction pipe 6A.

(Modification 3)
In the first embodiment, the mixing element 21 (see FIG. 4) is formed of a single disk material, but in the third modification, as shown in FIGS. 7 and 8, two annular members 7 having different outer diameters are used. One unit of the mixing element 21 is formed by a set of annular assemblies 70 obtained by superimposing (7a, 7b). Specifically, with reference to FIG. 8, the annular member 7 is constituted by one annular partition wall portion 71 and a plurality of linear partition wall portions 72, and the linear partition wall portion 72 is an annular partition wall portion. 71 are arranged at equal intervals along the circumferential direction of the annular partition wall 71 so as to protrude inward and outward of 71 and extend in the radial direction. One unit of the mixing element 21 is formed by overlapping two annular members 7 having different outer diameters of the annular partition wall 71 to form a set of annular members 70. The mixing element 21 formed by a set of annular assemblies 70 includes a plurality of first through holes 22 arranged in the circumferential direction and a second through hole 23 at the center formed by a small-diameter annular member 7. (See the lower diagram in FIG. 8). The blade body 20 is formed by laminating a plurality of sets of ring assemblies 70 as a unitary mixing element 21 and fixing the nuts n by tightening nuts n through bolt holes 25 provided at two positions at 180 degrees. Is formed.

  According to the blade body 20, since there is only one first through hole 22 in the radial direction (see the lower diagram in FIG. 8), the fluid flowing in the radial direction (the extending direction of the mixing element 21) The flow resistance of A can be reduced. Furthermore, since the laminated linear partition walls 72 form blades, a violent discharge flow toward the outer periphery is generated. Accordingly, the outflow rate of the fluid A from the discharge port 20β of the blade body 20 increases, and accordingly, the suction force at the suction ports 20α1, 20α2 of the blade body 20 increases, and the fluid A from the suction ports 20α1, 20α2 increases. The inflow flow rate can be increased. Therefore, the suction amount of the particles B at the bottom of the stirring tank 5 can be increased through the suction pipe 6. Further, the flow amount of the fluid A as a whole by the stirring blade 2 also increases. Therefore, the whole fluid A including the particles B and the liquid can be further stirred. Further, since the annular member 7 has a simple shape constituted by the annular partition wall portion 71 and the linear partition wall portion 72, it is easy to manufacture, and the blade body 20 is easily formed at low cost. be able to. In addition, the mixing element 21 having only one first through hole 22 in the radial direction is not only formed by the above-described ring assembly 70 but also formed by a single plate member. Also good.

(Modification 4)
In the first embodiment, the wing body 20 is configured by a laminate of the mixing elements 21, but as shown in FIGS. 9A and 9B, the wing body 20 a of Modification 4 is a cylinder that penetrates in the rotation axis direction. A fluid flow path is formed by a cylindrical hollow portion 24 and a horizontal through hole 22 radially extending from the hollow portion 24 in the circumferential direction. The one-piece blade main body 20a can be manufactured by a 3D printer, or can be manufactured by drilling a lump material to form the hollow portion 24 and the lateral through-hole 22.

(Modification 5)
In the stirring blade 2A of the first embodiment, the suction pipe 6 is disposed in the suction port 20α2 at the lower part of the blade body 20, but the stirring blade 2A-1 in the stirring device 1A-1 of the fifth modification example is shown in FIG. Further, the opening 41 of the holding plate 4A has a smaller diameter than the lower suction port 20α2, and the suction pipe 6 is not provided. In this case, the flow rate of the fluid A at the opening 41 leading to the wide space of the hollow portion 24 can be increased, and the suction of the fluid A including the particles B at the bottom of the stirring tank 5 is promoted from the lower suction port 20α2. can do. In the fifth modification, the suction pipe 6 having the same diameter as the opening 41 having a small diameter may be provided on the holding plate 4A.

(2) Embodiment 2
A stirrer 1B shown in FIG. 11 includes a stirrer 5 that contains the fluid A and a stirrer blade 2B of the second embodiment that is disposed in the fluid A in the stirrer 5. Stirrer 1B can be used, for example, to disperse gas (air C) in a liquid. Note that the gas may be a gas other than the air C.

  In the stirring blade 2B of the second embodiment, a cylindrical nozzle for sucking the fluid A serves as the gas introduction tube 8 and is connected to the suction port 20α1 on the upper surface of the blade body 20. That is, the nozzle holding plate 4 is arranged on the upper surface of the laminate of the plurality of mixing elements 21, and the gas introduction pipe 8 is arranged so as to extend above the blade body 20 with respect to the opening 41 of the nozzle holding plate 4. Has been.

  The rotating shaft 51 is inserted through the gas introduction pipe 8 and the lower end of the rotating shaft 51 is connected to the center position of the lower surface of the blade body 20. That is, the shaft holder plate 3 is disposed on the lower surface of the laminate of the plurality of mixing elements 21, and the lower end of the rotating shaft 51 inserted into the gas introduction pipe 8 with respect to the shaft holder plate 3 is the shaft holder plate 3. It is connected to the attachment part 32 of the center part from the upper surface side. Other configurations of the stirring blade 2B of the second embodiment are the same as those of the stirring blade 2A of the first embodiment.

  According to the stirring blade 2B of the second embodiment, as in the first embodiment, when the stirring blade 2B is rotated by the electric motor M, the fluid A inside the blade body 20 is urged from the discharge port 20β to the outside by the centrifugal force of rotation. By flowing out well, a large suction force is generated at the upper and lower suction ports 20α1, 20α2 from the flow path inside the blade body 20. In this case, the air C on the liquid surface can be strongly sucked from the gas introduction pipe 8 and sufficiently introduced into the blade body 20 at the suction port 20α1 above the blade body 20. Therefore, the air C can be sufficiently introduced into the liquid having a higher pressure than the external atmosphere. On the other hand, from the suction port 20α2 at the lower part of the blade body 20, the liquid in the agitation tank 5 can be strongly sucked and sufficiently flowed into the blade body 20.

  Then, the gas-liquid fluid A including the air C flowing into the blade body 20 passes through the plurality of first through holes 22 that are flow paths, as in the case of the first embodiment. While flowing toward the section, the mixing element 21 is divided and merged in the extending direction of the mixing element 21, and at the same time, divided and merged in the stacking direction of the mixing element 21 and highly mixed. That is, the air C that has flowed into the wing body 20 is finely divided (such as microbubbles) by the division and is highly dispersed in the liquid.

  In this way, the air C on the liquid surface is sufficiently sucked into the blade body 20 from the upper suction port 20α1 through the gas introduction pipe 8, and at the same time, the liquid below the stirring blade 2B is discharged from the lower suction port 20α2. The gas-liquid fluid A sufficiently sucked into the wing body 20 and sucked into the wing body 20 is circulated through the flow path inside the wing body 20 and highly mixed, so that By causing the plurality of discharge ports 20β to flow out vigorously, the air C can be vigorously flowed together with the entire liquid in the stirring tank 5. Therefore, the air C can be highly dispersed in the liquid in the stirring tank 5. Furthermore, since the introduction of the air C is caused by generating a suction force in the gas introduction pipe 8 by the rotation of the stirring blade 2B, there is no need to separately provide a gas supply means for introducing the air C as in Patent Document 2. Further, there is no energy consumption due to pneumatic supply of the gas supply means, and the cost required for stirring can be reduced.

(Modification 1)
In the second embodiment, the gas introduction pipe 8 (see FIG. 11) is only connected to the upper part of the blade body 20 at the lower end, but in the first modification, as shown in FIGS. 12 (a) and 12 (b), The gas introduction pipe 8A is supported by a cross-shaped support member 81 disposed on the outer periphery of the rotary shaft 51 at the upper part in the pipe 8A. Thereby, at the time of rotation of the stirring blade 2B, the gas introduction tube 8A is prevented from vibrating so that the upper end portion draws a circle, and can maintain a straight posture on the rotation axis. Accordingly, it is possible to prevent the gas introduction tube 8A and the rotation shaft 51 from being damaged by vibrating the gas introduction tube 8A and coming into contact with the rotation shaft 51. The height of the support member 81 is set above the liquid level in order to prevent foreign matter from entering the liquid by being immersed in the liquid in the stirring tank 5 when the rotation of the stirring blade 2B is stopped. It is preferable to do.

(Modification 2)
In the second embodiment, the gas introduction pipe 8 (see FIG. 11) introduces the air C only from the upper end opening of the pipe. However, in the second modification, as shown in FIG. An air hole 83 for taking in air is provided in the upper side wall surface exposed from the above. Thereby, the air C can be taken in from both the upper end opening 8a of the gas introduction pipe 8B and the air hole 83, and more air C can be easily introduced into the blade body 20. Even when the gas introduction pipe 8B has a small diameter or when the support member 81 is disposed in the gas introduction pipe 8A as shown in FIG. 12, the air C is sufficiently introduced into the blade body 20. Can do. When the support member 81 (see FIG. 12) is disposed in the gas introduction pipe 8B, the position of the air hole 83 provided in the gas introduction pipe 8B is provided on one or both of the upper side and the lower side of the support member 81. However, it is preferable to provide it below the support member 81. By providing the air hole 83 below the support member 81, the air C can be introduced into the gas introduction pipe 8 </ b> B from the air hole 83 without receiving the air resistance by the support member 81.

(Modification 3)
In the stirring device 1C of the modification 3, the stirring blade 2C is further provided with a plate-like blade member 26, as shown in FIG. A plurality of (for example, six) blade members 26 are provided at equal intervals in the circumferential direction on the outer peripheral portion of the blade body 20. Each blade member 26 is disposed such that the plate surface faces the rotation direction of the stirring blade 2C. In this case, each blade member 26 is arranged perpendicularly so that the extending direction of the plate surface coincides with the rotation axis of the rotation shaft 51, but has a predetermined inclination angle with respect to the rotation axis. It may be arranged. By providing such a blade member 26, the fluid A on the outer peripheral portion of the stirring blade 2C can be vigorously disturbed, and the entire fluid A can be further stirred.

  In Modification 3, the stirring blade 2 </ b> C may be provided with a plate-like blade member 26 on the inner peripheral portion of the blade body 20. By providing the blade member 26 on the inner peripheral portion, the suction flow of the fluid A to the stirring blade 2C can be increased by the strong suction flow generated on the back surface of the blade member 26. Furthermore, you may provide the blade member 26 in both the outer peripheral part and inner peripheral part of 2 C of stirring blades.

(Modification 4)
In the stirring blade 2B (see FIG. 11) of the second embodiment, the gas introduction pipe 8 is disposed in the suction port 20α1 on the upper surface of the blade body 20, but in the stirring device 1D of the fourth modification, as shown in FIG. The stirring blade 2D has a configuration in which the gas introduction pipe 8 is not provided. In this state, the fluid A inside the blade body 20 flows out of the blade body 20 from the discharge port 20β by the rotating operation of the stirring blade 2D, and suction forces are generated in the upper and lower suction ports 20α1, 20α2, and the hollow portion The liquid 24 is sucked into the lower surface through the suction port 20α2 on the lower surface and the air C is sucked in from the suction port 20α1 on the upper surface, and the fluid A containing the liquid and air C flows into the stirring blade 2D from the hollow portion 24. As shown in FIG. 15, when the level of the fluid A becomes an inverted triangle when the stirring blade 2D is rotated and the liquid level is lowered and recessed in the suction port 20α1 on the upper surface, the suction port 20α1 on the upper surface Not only air C but also liquid above the blade body 20 is sucked. Thereby, the effect | action similar to Embodiment 2 is exhibited, and many air C can be disperse | distributed in the liquid in the stirring tank 5. FIG.

In addition, this invention is not limited only to the said embodiment, It can change arbitrarily in a claim.
For example, in the stirring blade 2A in the first embodiment, as described in the third modification of the second embodiment, the plate-like blade member 26 may be provided on the outer peripheral portion and / or the inner peripheral portion of the blade main body 20. Good.
In the first embodiment, when the specific gravity of the particles B is smaller than the specific gravity of the liquid and easily floats in the upper layer of the fluid A, the suction pipe 6 is connected to the wing body 20 in order to easily suck the floating particles B. It may be connected to the suction port 20α1 on the upper surface side and extended upward of the wing body 20. In this case, the suction pipe 6 connected to the upper part is disposed in the fluid A, and the tip of the suction pipe 6 is disposed in the upper layer of the fluid A.
Further, in the wing body 20 in the second embodiment, as described in the third modification of the first embodiment, a unit in which one unit of the mixing element 21 is formed by a set of circular assembly members 70 may be used.
Further, also in the wing body 20 in the second embodiment, like the wing body 20a described in the fourth modification of the first embodiment, the cylindrical hollow portion 24 penetrating in the rotation axis direction and the radial direction from the hollow portion 24 in the circumferential direction. It is also possible to use a single member in which a fluid flow path is formed by the lateral through-holes 22 that spread out.
In each embodiment or modification, a plurality of baffle plates extending in the vertical direction (vertical direction) may be disposed on the inner peripheral surface of the stirring tank 5, for example, four baffle plates are 90. You may make it arrange | position in a degree position.

DESCRIPTION OF SYMBOLS 1 Stirring apparatus 2 Stirring blade 3 Shaft holder plate 4 Nozzle holding plate 5 Stirring tank 6 Suction pipe (nozzle)
7 Ring material 8 Gas introduction pipe (nozzle)
20α1 (20α) Upper suction port 20α2 (20α) Lower suction port 20β Discharge port 20 Blade body 21 Mixing element 22 First through hole 23 Second through hole 24 Hollow portion 25 Bolt hole 26 Blade member 31 Small opening 32 Attachment portion 41 Opening portion 51 Rotating shaft 70 Ring assembly 71 Annular partition wall portion 72 Linear partition wall portion 81 Support member 83 Air hole b Bolt n Nut A Fluid B Particle C Air M Electric motor

Claims (16)

A wing body connected to a rotating shaft and provided with a fluid inlet and outlet;
Inside the wing body, a flow path connecting the suction port and the discharge port is provided,
The suction port is disposed at a position on the rotation axis of the rotation shaft or a position close to the rotation axis,
The discharge port is disposed at a position outside the suction port,
A stirring blade in which a nozzle for sucking fluid is disposed at the suction port. The stirring blade according to claim 1,
The flow path inside the blade body is a stirring blade formed so as to divide the fluid into a plurality of directions inside the blade body. The stirring blade according to claim 1 or 2,
The nozzle is an agitating blade having an enlarged diameter at a tip portion for sucking fluid. In the stirring blade according to any one of claims 1 to 3,
The wing body is constituted by a laminate in which a plurality of mixing elements are laminated in the rotational axis direction,
The mixing element has a plurality of first through holes,
In the wing body, the mixing element is arranged such that a part or all of the first through hole overlaps the first through hole of the adjacent mixing element, and the first through hole of the adjacent mixing element The agitating blades are arranged so as to circulate fluid between them and to divide the fluid in the extending direction of the mixing element. The stirring blade according to claim 4,
The mixing element has a second through hole larger than the first through hole;
A stirring blade in which the second through hole communicates in the stacking direction in the blade body, the suction port is formed, and a hollow portion for allowing fluid to flow into the blade body is formed. In the stirring blade according to claim 4 or 5,
The blade body is a stirring blade in which a plurality of mixing elements are fixed in a stacked state by a fixing means so as to be disassembled. In the stirring blade according to any one of claims 1 to 6,
The wing body is provided with the inlet at the top and bottom,
A stirring blade in which one of the suction ports of the blade body is provided with a restricting plate that restricts the flow of fluid more than the other suction port.   The stirring apparatus by which the stirring blade of any one of Claims 1-7 is arrange | positioned in the fluid in a stirring tank. In the stirring device according to claim 8,
An agitation device including a drive unit that rotationally drives the rotation shaft. A stirring method for stirring a fluid by the stirring blade according to any one of claims 1 to 7, or the stirring device according to claim 8 or 9,
By rotating the agitating blade, the fluid inside the blade body flows out from the discharge port to the outside of the blade body to generate a suction force at the suction port, and the fluid outside the blade body is sucked from the suction port and flows into the blade body. Stirring method. The stirring method according to claim 10,
A method of stirring a fluid containing particles in a liquid,
In the lower suction port of the wing body, the nozzle is arranged as a suction pipe,
A stirring method for sucking fluid through the suction pipe while entraining the particles from the suction port at the lower part of the wing body. The stirring method according to claim 10,
It is a stirring method for dispersing gas in a liquid,
The nozzle is arranged as a gas introduction pipe at the suction port at the top of the wing body,
A stirring method for sucking the gas from the suction port at the top of the blade body through the gas introduction pipe. The stirring method according to claim 12,
An air hole is provided in the side wall surface of the gas introduction pipe,
A stirring method for sucking a gas from both a front end opening of the gas introduction pipe and the air hole. The stirring method according to claim 12 or 13,
The stirring method in which the gas introduction pipe connected to the suction port at the upper part of the wing body is supported by a support member disposed on an outer peripheral portion of the rotating shaft that is inserted into the gas introduction pipe. A method for stirring fluid containing particles in a liquid by means of a stirring blade that rotates about a rotation axis,
The stirring blade is constituted by a laminate in which a plurality of mixing elements are stacked in the rotation axis direction, and is supported by a rotation shaft connected to an upper portion of the stirring blade,
The mixing element has a plurality of first through holes and a second through hole larger than the first through hole,
In the stirring blade, the mixing element is arranged such that a part or all of the first through hole overlaps the first through hole of the adjacent mixing element, and the first through hole of the adjacent mixing element The fluid discharge port is formed by the plurality of first through holes that are arranged so as to circulate fluid between them and to divide the fluid in the extending direction of the mixing element and open to the outer periphery of the stirring blade In addition, the second through hole communicates in the stacking direction to form a fluid suction port on the upper and lower surfaces of the stirring blade and to form a hollow portion for allowing fluid to flow into the blade body. And a holding plate having an opening having a smaller diameter than the lower suction port is disposed on the lower surface of the stirring blade,
By rotating the agitating blade, the fluid inside the blade body is caused to flow out from the discharge port to the outside of the blade body to generate a suction force at each of the suction ports, and the particles are entrained from the suction port on the lower surface into the hollow portion. A stirring method for sucking fluid and allowing fluid containing particles from the hollow portion to flow into the stirring blade. A stirring method in which a gas is dispersed in a liquid by a stirring blade that rotates about a rotation axis,
The stirring blade is constituted by a laminate in which a plurality of mixing elements are stacked in the direction of the rotation axis, and is supported by a rotation shaft connected to a lower portion of the stirring blade,
The mixing element has a plurality of first through holes and a second through hole larger than the first through hole,
In the stirring blade, the mixing element is arranged such that a part or all of the first through hole overlaps the first through hole of the adjacent mixing element, and the first through hole of the adjacent mixing element The fluid discharge port is formed by the plurality of first through holes that are arranged so as to circulate fluid between them and to divide the fluid in the extending direction of the mixing element and open to the outer periphery of the stirring blade In addition, the second through hole communicates in the stacking direction to form a fluid suction port on the upper and lower surfaces of the stirring blade and to form a hollow portion for allowing fluid to flow into the blade body. ,
The rotating operation of the stirring blade causes a fluid inside the blade body to flow out from the discharge port to the outside of the blade body, thereby generating a suction force at each suction port, and sucking a gas from the suction port on the upper surface into the hollow portion, A stirring method in which a fluid containing liquid and gas is allowed to flow into the stirring blade from a hollow portion.

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