Stirring blade

Abstract

To provide a stirring blade which enables mixing, dispersion, uniformization, atomization, emulsification, dissolution of a soluble solid in a liquid, and gas refinement, etc. in a reliable manner with a simple structure.SOLUTION: A stirring blade 1 according to the invention is connected to a position near an end of a rotary shaft 11 of a rotation mechanism, a handy mixer, or the like which uses an electric motor or an air motor and generally includes a blade part 12 which is rotated around the rotary shaft 11 by rotational operation of these motors or the mixer; and a porous cylindrical body 13 which encloses the blade part 12, is connected to the rotary shaft 11, and rotates around the rotary shaft 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an agitating impeller for agitating liquids and various other fluids and for performing mixing, dispersion, homogenization, atomization, emulsification, dissolving soluble solids in liquids, and atomizing gases, etc., and particularly relates to an agitating impeller that can reliably dissolve soluble solids and atomize gases with a simple structure. [Background technology]

[0002] Conventionally, mixing of two or more types of fluids, or mixing, dispersing, and homogenizing solids such as various powders added to a fluid has been performed by rotating various types of mixing blades, such as propeller-type, paddle-type, and disk turbine-type blades, in the fluid.

[0003] Among such mixing, particularly for mixing that atomizes, dissolves, or emulsifies soluble solids in a liquid, a mixer unit is used that is composed of a stator having a plurality of openings in its peripheral wall and a rotor that is placed inside the stator with a small radial gap between the rotor and the inner peripheral surface of the stator, as disclosed in Patent Document 1, for example.

[0004] This mixer unit is capable of atomizing, dissolving, or emulsifying soluble solids by utilizing the shear force generated in the small gap between the rapidly rotating rotor and the fixed stator.

[0005] Patent Document 2 discloses an impeller having a porous cylinder fixed to the tip of the discharge flow type impeller and rotating integrally with the shaft. This impeller is a so-called flat turbine impeller having a disk that prevents bubbles from rising in order to be used in a stirring tank that performs aeration stirring, and the bubbles that are prevented from rising pass through the porous cylinder attached to the tip of the flat turbine impeller, making it possible to break the gas into fine particles.

[0006] Furthermore, Patent Document 3 discloses an agitator having at least a pair of propeller blades that generate opposing inward axial flows, which are provided on a rotating shaft inside and / or near the outside of a concentric porous cylinder, and which rotates the propeller blades and the porous cylinder together with the rotation of the rotating shaft.

[0007] This stirring blade has a pair of propeller blades with opposite pitch that rotate integrally with the porous cylinder and are positioned inside and / or near the outside of both open ends of the porous cylinder. When rotated, this creates a flow of liquid toward the inside of the porous cylinder, and the liquid is forced through the holes in the porous cylinder to atomize and dissolve the soluble solids. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] International Publication WO2012 / 023218 [Patent Document 2] Patent No. 3695033 [Patent Document 3] Special Publication No. 6-85862 Summary of the Invention [Problem to be solved by the invention]

[0009] These mixer units, stirring blades and stirring vanes are each capable of atomizing and dissolving soluble solids and micronizing gases, but they also have the following problems.

[0010] For example, in the mixer unit of Patent Document 1, the shear force generated increases as the rotor is rotated as fast as possible to increase the speed difference with the fixed, immovable stator. Also, the smaller the gap between the rotor and the stator, the greater the shear force generated, and the more reliably the soluble solid can be atomized, dissolved, or emulsified. However, in order to rotate the rotor at high speed and to reduce the gap between the rotor and the stator, it is necessary to increase the rigidity of the mixer unit, which poses the problem of making the device more complicated and increasing the cost.

[0011] Furthermore, the agitator blade of Patent Document 2 is configured such that a porous cylinder is fixed to the tip of the discharge flow type agitator blade and rotates integrally with the shaft, so that the peripheral speed of the tip of the agitator blade and the peripheral speed of the porous cylinder are the same, and it is not possible to generate a speed difference as in the agitator blade (rotor) and porous cylinder (stator) of Patent Document 1, which makes it difficult to efficiently atomize soluble solids, dissolve them, or finely disperse gases.

[0012] Furthermore, the stirring blade of Patent Document 3 rotates integrally with the porous cylinder and creates a flow of liquid toward the inside of the porous cylinder by means of propeller blades arranged in pairs inside and / or near the outside of both open ends of the porous cylinder. However, the arrangement of the propeller blades on the inside and / or near the outside close to both open ends also creates a flow that obstructs the flow of liquid toward the inside of the porous cylinder, making it difficult to efficiently atomize and dissolve soluble solids.

[0013] Furthermore, the stirring blade of Patent Document 3 requires the preparation of a pair of propeller blades, which is disadvantageous in terms of cost. [Means for solving the problem]

[0014] The object of the present invention has been made in consideration of the above-mentioned circumstances, and a main object of the present invention is to provide an agitating impeller having a simple structure and capable of reliably performing mixing, dispersion, homogenization, atomization, emulsification, dissolution of soluble solids in liquid, and micronization of gas, etc.

[0015] Another object of the present invention is to provide an agitating impeller that can reliably pass a solvent or solute through the holes of a porous cylinder, thereby efficiently dispersing, homogenizing, atomizing, emulsifying, dissolving soluble solids in liquid, and atomizing gases.

[0016] In order to solve the above-mentioned problems and achieve the object, the agitator blade of the present invention, according to claim 1, comprises a blade portion connected to a rotating shaft and rotating around the rotating shaft, and a porous cylinder surrounding the blade portion, connected to the rotating shaft and rotating around the rotating shaft, the central axis of which is concentric with the rotating shaft, and the porous cylinder is characterized in that at least one end is open and an axial space is provided between the open end and the blade portion.

[0017] In addition, in order to solve the above-mentioned problems and achieve the object, the agitator blade of the present invention, according to the description of claim 2, is characterized in that it is provided with a deceleration separation portion between the inner wall surface of the porous cylinder and the tip of the blade portion.

[0018] In addition, in order to solve the above-mentioned problems and achieve the object, the stirring blade of the present invention is characterized in that, according to the description of claim 3, the other end of the porous cylinder is open, and the blade portion is arranged approximately in the center of the axial length position of the porous cylinder.

[0019] In addition, in order to solve the above-mentioned problems and achieve the object, the agitator blade of the present invention is characterized in that, according to the description of claim 4, the other end of the porous cylinder is closed, and the blade portion is arranged in the vicinity of the other closed end.

[0020] In addition, in order to solve the above-mentioned problems and achieve the objective, the stirring blade of the present invention, according to claim 5, is characterized in that the other end of the porous cylinder is closed, and the closed surface and / or the blade portion arranged in the vicinity of the other closed end is provided with a convex inclination from the outer periphery toward the center.

[0021] In addition, in order to solve the above-mentioned problems and achieve the objectives, the stirring blade of the present invention is characterized in that, according to claim 6, the radius of the blade portion is less than or equal to (1 / √2) of the inner diameter of the porous cylinder. Effect of the Invention

[0022] According to the present invention, it is possible to reliably perform mixing, dispersion, homogenization, atomization, emulsification, dissolution of soluble solids in liquid, and atomization of gas with a simple structure.

[0023] Furthermore, according to the present invention, it is possible to reliably pass a solvent or solute through the holes of a porous cylinder, thereby enabling efficient dispersion, homogenization, atomization, emulsification, dissolution of soluble solids in liquid, and atomization of gases, etc. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a perspective view showing a first embodiment of an agitating blade according to the present invention; [Diagram 2] Front view of Figure 1 [Diagram 3] Bottom view of Figure 1 [Figure 4] Partial cross-sectional view of Fig. 1 [Diagram 5] Reference diagram of Fig. 1 in use [Figure 6] FIG. 2 is a partial cross-sectional view showing a second embodiment. [Figure 7] FIG. 3 is a front view showing a third embodiment; [Figure 8] Bottom view of Figure 7 [Figure 9] Blade portion of the third embodiment [Figure 10] Partial cross-sectional view of Fig. 7 [Figure 11] FIG. 4 is a front view showing the fourth embodiment. [Figure 12] Bottom view of Figure 11 [Figure 13] The blade of the fourth embodiment [Figure 14] Partial cross-sectional view of Fig. 11 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS EXAMPLES

[0025] <First Example> The configuration of an agitating blade 1 as a first embodiment of the present invention will be described with reference to Figures 1 to 5. Figure 1 is a perspective view showing the first embodiment of the agitating blade 1 of the present invention as seen obliquely from below, Figure 2 is a front view of Figure 1, Figure 3 is a bottom view of Figure 1, Figure 4 is a partial cross-sectional view of Figure 1, and Figure 5 is a reference view of Figure 1 in use.

[0026] 1 to 5, the agitator blade 1 generally comprises a blade portion 12 connected near the end of a rotating shaft 11 of a rotating mechanism using an electric motor, an air motor, or a handy mixer, and rotates around the rotating shaft 11 by the rotating action of the motor or mixer, and a porous cylinder 13 surrounding the blade portion 12 and connected to the rotating shaft 11 to rotate around it.

[0027] The stirring blade 1 of the present invention is installed in a container 103 containing a solution 102 to be stirred, with a blade portion 12 and a porous cylinder 13 surrounding this blade portion 12 connected to a rotating shaft 11 of an electric motor 101 as shown in FIG.

[0028] The impeller 1 uses four inclined paddle blades, which are axial-flow type impellers, for the impeller 12. Specifically, the impeller 12 includes four paddle blades 12a inclined with respect to the axial direction of the rotating shaft 11 and an impeller boss 12b to which the four paddle blades 12a are attached, and the impeller boss 12b is screwed or welded to the rotating shaft 11 to rotate the rotating shaft 11 to generate an agitating flow.

[0029] The inclination direction of the paddle blades 12a is such that when the rotating shaft 11 rotates in the direction of arrow A in Figures 1 to 5 (counterclockwise in Figure 3), a flow of the solution occurs upward on the paper in Figures 1, 2, 4, and 5.

[0030] In this first embodiment, the blade portion 12 has four inclined paddle blades, but it is also possible to use inclined propeller blades, which are the same axial flow type stirring blades, or inclined paddle blades with a different number of blades. It is also possible to use various turbine blades or non-inclined paddle blades, which are discharge flow type stirring blades in which the solution to be stirred 102 is discharged laterally (away from the rotation shaft 11) of the blade portion 12, generating a flow of solution upward on the paper in Figures 1, 2, 4, and 5.

[0031] In the first embodiment, the porous cylinder 13 is provided with a porous cylindrical portion 13a having a number of holes on its cylindrical surface, and a cylindrical portion boss 13b to which the porous cylindrical portion 13a is attached, the cylindrical portion boss 13b being screwed or welded to the rotating shaft 11 so that the central axis of the porous cylinder 13 and the rotating shaft 11 are concentric.

[0032] In addition, the porous cylindrical portion 13a of the porous cylinder 13 is a cylindrical punched metal having circular holes in the agitator blade 1. The porous cylindrical portion 13b may be a cylindrical punched metal having rectangular holes or a cylindrical mesh having a mesh structure. Also, the cylindrical boss 13b may be integral with the porous cylindrical portion 13a by being manufactured by cutting out a solid material of metal or resin.

[0033] Next, the characteristic configuration of the agitator blade 1 of the present invention will be described mainly with reference to Figure 4. Figure 4 is a partial cross-sectional view of the porous cylinder 13 portion of Figure 1 cut in the axial direction of the rotating shaft 11. According to Figure 4, the agitator blade 1 of the present invention has an axial space portion 13d between the open end 13c of the porous cylinder 13 and the blade portion 12, which serves as a space for receiving the inflow of the solution.

[0034] When the stirring blade 1 having this axial space portion 13d is rotated in the direction of arrow A in the solution 102 to be stirred as shown in Figure 5, the inclination of the paddle blade 12a is such that a flow of the solution occurs upward on the page in Figure 5, so that the solution 102 to be stirred flows from the open end 13c of the porous cylinder 13 toward the inside of the porous cylinder 13.

[0035] Even if the paddle blades 12a are inclined so as to generate an axial flow toward the blade portion 12, a part of the solution is bounced off the paddle blades 12a, and a flow in a direction away from the blade portion 12 is generated.

[0036] In this regard, the stirring blade 1 of the present invention has an axial space portion 13d on the side of the open end 13c of the porous cylinder 13 that receives the inflow of the solution to be stirred 102, and therefore the blade portion 12 is positioned away from the open end 13c, so that the solution that is bounced off the paddle blade 12a is itself a solution that has already flowed into the interior of the porous cylinder 13, and there is no effect on the inflow of the solution to be stirred 102 into the porous cylinder 13.

[0037] Also, according to Figure 4, the stirring blade 1 of the present invention has a deceleration separation section 13e between the inner wall surface of the porous cylinder 13 and the tip of the blade section 12, which provides a space for decelerating the speed of the solution ejected from the blade section 12.

[0038] When the stirring blade 1 of the present invention is rotated in the solution to be stirred 102 as shown in Figure 5, the solution flowing in from the open end 13c of the porous cylinder 13 is ejected laterally (away from the rotation axis 11) by the blade portion 12 and passes through the numerous holes in the porous cylinder 13.

[0039] In this case, the soluble solids in the solution are dispersed, homogenized, atomized, emulsified, dissolved, etc. by passing through the holes in the porous cylinder 13. However, unlike the mixer unit of Patent Document 1, which utilizes the speed difference between a fixed, motionless stator and a rotor that rotates at high speed, in the agitator blade 1 of the present invention, the blade portion 12 and the porous cylinder portion 13 are both connected to the same rotating shaft 11 and rotate at the same angular velocity. Therefore, if the gap between the rotor and the stator is small as in the mixer unit of Patent Document 1, there will be no difference in the peripheral speed between the tip of the blade portion 12 and the peripheral speed of the inner wall surface of the porous cylinder 13, and the shear force will be small.

[0040] To avoid this, the agitator blade 1 of the present invention is provided with a speed reduction separation section 13e that provides a predetermined gap between the tip of the blade section 12 and the inner wall surface of the porous cylinder 13, and this speed reduction separation section 13e creates a difference between the peripheral speed of the tip of the blade section 12 and the peripheral speed of the inner wall surface of the porous cylinder section 13, thereby increasing the shear force.

[0041] Specifically, if the radius of the tip of the blade portion 12 is r and the gap width of the deceleration separation portion 13e is s, then the radius of the inner wall surface of the porous cylinder 13 is (r+s), so when the rotating shaft 11 rotates once in one second, the circumferential speed of the tip of the blade portion 12 is 2πr, and the circumferential speed of the inner wall surface of the porous cylinder 13 is (2πr+2πs), generating a speed difference of the circumferential speed 2πs, which is the gap width of the deceleration separation portion 13e, and increasing the shear force.

[0042] Furthermore, the solution ejected from the tip of the blade portion 12 spreads out before reaching the inner wall surface of the porous cylinder 13 via the deceleration separation portion 13e, so that the flow rate per unit area at the inner wall surface of the porous cylinder 13 becomes r / (r+s) of the flow rate per unit area ejected from the tip of the blade portion 12, and the flow rate of the ejected solution is decelerated.

[0043] As a result, the solution passing through the holes of the porous cylinder 13 is subjected to a larger shear force due to the synergistic effect of the difference between the peripheral speed of the tip of the blade portion 12 and the peripheral speed of the inner wall surface of the porous cylindrical portion 13, and the deceleration of the flow rate of the discharged solution due to the gap width s of the deceleration separation portion 13e, making it possible to efficiently disperse, homogenize, atomize, emulsify, and dissolve soluble solids in the liquid.

[0044] The stirring of a solution to be stirred using the stirring blade 1 having the above-mentioned configuration as the first embodiment of the present invention will be described below. As shown in Fig. 5, the rotating shaft 11 of the stirring blade 1 as the first embodiment is connected to an electric motor 101, and the blade part 12 surrounded by a porous cylinder 13 is placed in the solution 102 to be stirred in a container 103.

[0045] In this state, when the electric motor 101 is rotated in the direction of the arrow A in the figure, the inclination of the paddle blades 12a generates an upward axial flow (from the bottom of the container 103 toward the water surface) from the bottom of the container 103 toward the liquid surface, and the solution to be stirred 102, which contains solutes to be dispersed, homogenized, dissolved, etc. that have sunk to the bottom of the container due to their specific gravity, etc., is stirred up and flows into the porous cylinder 13.

[0046] When solutes, etc. flow into this porous cylinder 13, the solutes, etc. are not bounced off the paddle blades 12a because there is an axial space 13d on the side of the open end 13c of the porous cylinder 13, and there is no effect on the flow of solutes, etc. into the porous cylinder 13.

[0047] The solution 102 to be stirred that has flowed into the porous cylinder 13 is discharged laterally (away from the rotation axis 11) near the blade portion 12 and directed through the deceleration separation portion 13e toward the numerous holes in the porous cylinder 13. At this time, due to the presence of the deceleration separation portion 13e, an effective shear force is generated by the combined effect of the difference between the circumferential speed of the tip of the blade portion 12 and the circumferential speed of the inner wall surface of the porous cylinder 13, and the deceleration of the flow rate of the discharged solution due to the gap width of the deceleration separation portion 13e.

[0048] Furthermore, through experiments by the inventors, it has been confirmed that an effective shear force is generated in the deceleration separation section 13e when the area of ​​the surface perpendicular to the rotation axis 11 when the blade section 12 is rotated is less than half the area of ​​the surface perpendicular to the rotation axis 11 of the porous cylinder 13, in other words, when the radius of the blade section 12 is less than (1 / √2) the inner diameter of the porous cylinder 13.

[0049] The solution to be stirred 102 thus discharged by the blade portion 12 in the direction away from the rotating shaft 11 is sheared in the numerous holes of the porous cylinder 13 and discharged to the outside of the porous cylinder 13, moves up and down and left and right on the wall surface of the container 103, and further flows into the porous cylinder 13 where it is efficiently dispersed, homogenized, atomized, emulsified, and soluble solids in the liquid are dissolved.

[0050] <Second Example> The configuration of an agitator blade 2 according to a second embodiment of the present invention will be described with reference to Fig. 6. Fig. 6 is a partial cross-sectional view of the porous cylinder 23 cut in the axial direction of the rotating shaft 21. Note that the same reference numerals are used to designate parts having the same configuration as in the first embodiment, and the description thereof will be omitted.

[0051] The inclination direction of the paddle blades 22a in FIG. 6 is such that when the rotating shaft 21 rotates in the direction of the arrow A in FIG. 6, an axial flow is generated downward on the paper surface of FIG.

[0052] In the second embodiment, the porous cylinder 23 in FIG. 6 is open at one end 23c on the upper side of the paper surface of FIG.

[0053] Like the first embodiment, the second embodiment also has an axial space portion 23d between the open end 23c of the porous cylinder 23 and the blade portion 22, which serves as a space for receiving the inflow of the solution. Therefore, when the paddle blade 22a rotates in the direction of arrow A, an axial flow is generated in the downward direction of the paper surface of Figure 6. Even if the solution to be stirred 102 that flows from the open end 23c of the porous cylinder 23 toward the inside of the porous cylinder 23 is bounced off by the paddle blade 22a, it is a solution that has already flowed into the interior of the porous cylinder 23, so there is no effect on the inflow of the solution to be stirred 102 into the porous cylinder 23.

[0054] Also, as shown in FIG. 6, the stirring blade 2 of the second embodiment, like the first embodiment, is provided with a deceleration separation section 23e between the inner wall surface of the porous cylinder 23 and the tip of the blade portion 22, which serves as a space for decelerating the speed of the solution ejected from the blade portion 22. As a result, a difference in peripheral speed occurs between the tip of the blade portion 22 and the inner wall surface of the porous cylinder portion 23, resulting in increased shear force.

[0055] As described above, the stirring blade 2 of the second embodiment, like the stirring blade 1 of the first embodiment, is equipped with an axial space portion 23d that reliably holds the stirring target solution 102 that has flowed into the porous cylinder 23 within the porous cylinder 23, and a deceleration separation portion 23e that generates a difference between the circumferential speed of the tip of the blade portion 22 and the circumferential speed of the inner wall surface of the porous cylinder portion 23, and that increases the shear force by slowing down the flow rate of the discharged solution due to the gap in the deceleration separation portion 23e, thereby making it possible to efficiently disperse, homogenize, atomize, emulsify, and dissolve soluble solids in liquid.

[0056] <Third Example> The configuration of the agitating blade 3 as a third embodiment of the present invention will be described with reference to Figures 7 to 10. Figure 7 is a front view showing the agitating blade 3 of the third embodiment of the present invention, Figure 8 is a bottom view of Figure 7, Figure 9 is a blade portion 32 of the agitating blade 3, and Figure 10 is a partial cross-sectional view of the porous cylinder 33 portion cut in the axial direction of the rotating shaft 31. Note that the same reference numerals are used for parts having the same configuration as the first and second embodiments, and their explanation will be omitted.

[0057] 7 to 10, the stirring blade 3 generally comprises a porous cylinder 33 connected near the end of a rotating shaft 31 of a rotating mechanism using an electric motor, an air motor, or a handy mixer, and rotates around the rotating shaft 31 by the rotating action of the motor or mixer, and a blade portion 32 surrounded by the porous cylinder 33 and attached to a cylindrical portion boss 33b of the porous cylinder 33 described later, and rotates in conjunction with the rotation of the porous cylinder 33.

[0058] 7 and 10, the porous cylinder 33 in the third embodiment is provided with a porous cylindrical portion 33a having a number of holes on its cylindrical surface, and a cylindrical portion boss 33b to which the porous cylindrical portion 33a is attached. The cylindrical portion boss 33b is disposed on the rotating shaft 31 by screwing or welding so that the central axis of the porous cylinder 33 and the rotating shaft 31 are concentric. The porous cylindrical portion 33a is formed of a punched metal having circular holes in a cylindrical shape, as in the first and second embodiments.

[0059] As shown in FIG. 10 , the porous cylinder 33 has an axial space portion 33d between the open end 33c of the porous cylinder 33 and the blade portion 32, which serves as a space for receiving the inflow of solution, and a deceleration separation portion 33e between the inner wall surface of the porous cylinder 33 and the tip of the blade portion 32, which serves as a space for decelerating the speed of the solution ejected from the blade portion 32.

[0060] Furthermore, on the surface of this cylindrical body boss 33b opposite to the surface to which the shaft is connected, the blade section 32 is attached by welding, screwing, or the like in a state in which it is surrounded by the porous cylindrical section 33a of the porous cylinder 33. As shown in Fig. 9, the blade section 32 in this third embodiment is a discharge flow type agitating blade having four bent blades 32a formed by cutting a circular plate-like member 32c and bending one side in one direction.

[0061] As described above, the four folded wings 32a of the blade portion 32 are folded in one direction on one side, and the surface opposite to the folding direction is flat. Therefore, as shown in Figures 8 and 10, the flat surface can be positioned with almost no gaps on the surface opposite to the surface to which the shaft of the cylindrical portion boss 33b is connected.

[0062] As in the third embodiment, by arranging the blade portion 32 at or near the closed end 33f, which is the end opposite the open end 33c of the porous cylinder 33, the solute, which is difficult to stir because it rises in the solution due to buoyancy like a gas, can be accumulated on the side of the closed end 33f and brought into contact with the blade portion 32, thereby making it possible to efficiently disperse, homogenize, and atomize the gas in the liquid.

[0063] In this way, the stirring blade 3 as the third embodiment of the present invention, like the first and second embodiments, is provided with an axial space portion 33d that reliably holds the stirring target solution 102 that has flowed into the porous cylinder 33 within the porous cylinder 33, and a deceleration separation portion 33e that generates a difference between the circumferential speed of the tip of the blade portion 32 and the circumferential speed of the inner wall surface of the porous cylinder portion 33 and generates a deceleration in the flow rate of the discharged solution, thereby increasing the shear force. Not only can this efficiently perform dispersion, homogenization, atomization, emulsification, and dissolution of soluble solids in liquid, but the blade portion 32 arranged at or near the closed other end 33f of the porous cylinder 33 can efficiently disperse, homogenize, and atomize gas in liquid, even if the solute is buoyant and difficult to stir.

[0064] In the third embodiment, the blade portion 32 is described as a discharge-type agitator having four bent blades 32a formed by cutting a circular plate-like member and bending it in one direction on one side. However, if an agitator having a convex inclination from the outer periphery toward the center on the side opposite the liquid surface, as disclosed in, for example, Patent Gazette No. 6558706 and Design Registration No. 1619704, is used, the blade portion 32 can be brought into contact with the gas accumulated on the closed other end 33f without accumulating more than necessary, making it possible to more efficiently disperse, homogenize, and atomize the gas in the liquid.

[0065] Furthermore, by providing a convex inclination from the outer periphery toward the center on the side of the closed end 33f, which is the surface opposite to the surface to which the shaft of the cylindrical boss 33b is connected (the closing surface), the gas accumulated on the side of the closed end 33f can be brought into contact with the blade portion 32 without accumulating more than necessary, making it possible to more efficiently disperse, homogenize, and atomize the gas in the liquid.

[0066] <Fourth Example> The configuration of the agitating blade 4 as a fourth embodiment of the present invention will be described with reference to Figures 11 to 14. Figure 11 is a front view showing the agitating blade 4 of the fourth embodiment of the present invention, Figure 12 is a bottom view of Figure 11, Figure 13 is a blade portion 42 of the agitating blade 4, and Figure 14 is a partial cross-sectional view of the porous cylinder 43 portion cut in the axial direction of the rotating shaft 41. Note that the same reference numerals are used for parts having the same configuration as the first to third embodiments, and the description will be omitted.

[0067] 11 to 14, the agitator blade 4 generally comprises a blade portion 42 which is connected to the vicinity of the end of a rotating shaft 41 of a rotating mechanism using an electric motor, an air motor, or a handy mixer, and which rotates around the rotating shaft 41 by the rotating action of the motor or mixer, and a porous cylinder 43 which surrounds the blade portion 42 and is connected to a cylinder connection portion 42d of the blade portion 42 described later, and which rotates around the rotating shaft 41.

[0068] 11 and 14, one end is open at the lower side of the paper and the other end is open at the upper side of the paper, and the cylindrical surface between the two ends is provided with a porous cylindrical portion 43a having a large number of holes. As in the first to third embodiments, the porous cylindrical portion 43a is made of a punched metal having circular holes shaped in a cylindrical shape.

[0069] In addition, as shown in Figure 14, the porous cylinder 43 has axial space portions 43d that serve as spaces for receiving the inflow of solution between the open end 43c of the porous cylinder 43 and the blade portion 42, and between the open other end 43g of the porous cylinder 43 and the blade portion 42.

[0070] Further, between the inner wall surface of the porous cylinder 43 and the tip of the blade portion 42, there is provided a deceleration separation portion 43e which serves as a space for decelerating the speed of the solution discharged from the blade portion 42.

[0071] As shown in FIG. 13, the blade portion 42 in this fourth embodiment is a discharge flow type agitator blade having four folded blades 42a formed by cutting slits in a circular plate-shaped member 42c and folding two blades in one direction and two in the other direction.

[0072] In addition, the blade portion 42 has a blade boss 42b at the center of rotation of the circular plate-shaped member 42c, and this blade boss 42b is connected to the rotating shaft 41 by screwing or welding, so that it rotates around the rotating shaft 41 by the rotation of the motor and mixer.

[0073] Furthermore, the wing portion 42 has four cylindrical body connection portions 42d extending in a direction away from the center of the circular plate-shaped member 42c, and these cylindrical body connection portions 42d connect to the inside of the porous cylinder 43 and are surrounded by the cylindrical body connection portions 42d.

[0074] The center of rotation of the blade boss 42b and the central axis of the porous cylinder 43 are arranged concentrically, and as the rotating shaft 41 rotates, the blades 42 and the porous cylinder 43 rotate concentrically.

[0075] In the configuration of the fourth embodiment, the vane portion 42 is disposed approximately at the center of the axial length of the porous cylinder 43 .

[0076] Furthermore, the blade portion 42 is not an axial flow type impeller in which the flow of the solution is in one direction, but rather a discharge flow type impeller in which the solution is discharged sideways, causing a flow of the solution toward the blade portion 42, so that the solution to be stirred 102 can be taken into the porous cylinder 33 from both the open end 43c and the other open end 43g of the porous cylinder 43.

[0077] In the fourth embodiment having such a configuration, not only can solutes floating on the liquid surface and solutes sinking to the bottom of the container be simultaneously and efficiently flowed into the porous cylinder 43, but also, by providing an axial space portion 43d that reliably holds the stirring solution 102, which contains solutes such as those to be dissolved and which has been flowed into the porous cylinder 33 from both open ends, within the porous cylinder 33, and a deceleration separation portion 43e that generates a difference between the circumferential velocity of the tip of the blade portion 42 and the circumferential velocity of the inner wall surface of the porous cylindrical portion 43 and generates a deceleration in the flow rate of the discharged solution, thereby increasing the shear force, it is possible to efficiently disperse, homogenize, atomize, emulsify, and dissolve soluble solids in the liquid.

[0078] As shown in FIG. 12, the plate-like member 42c and the cylinder-body connection portion 42d in the fourth embodiment have a large gap that does not impede the movement of the solution flowing in from the open end 43c and the other open end 43g of the porous cylinder 43, so that it is possible to efficiently disperse, homogenize, atomize, emulsify, and dissolve soluble solids in the liquid.

[0079] In the fourth embodiment, the blade portion 42 is described as being positioned approximately at the center in the axial length direction of the porous cylinder 43. However, in cases where it is desired to increase the width of the porous cylinder portion 43a to match the solute to be dissolved, the blade portion 42 may be positioned away from the center as long as the necessary axial space portion 43d can be secured. [Industrial Applicability]

[0080] Although the embodiments of the present invention have been described above, the agitator blades 1 to 4 of the present invention are not limited to the above-described embodiments, and it goes without saying that various modifications can be made within the scope of the gist of the present invention.

[0081] For example, although the blades 12, 22, 32, and 42 have been described as having four blades, the number of blades may be changed to five, three, etc. Furthermore, the shape of the paddle blades and the bending angle can also be changed as appropriate. [Explanation of symbols]

[0082] 1, 2, 3, 4...Mixing blades 11, 21, 31, 41...Rotation axis 12, 22, 32, 42... Wing section 12a, 22a Paddle blade 32a, 42a ·· Folded wings 12b, 22b, 42b ·· Wing boss 32c, 42c Plate-shaped members 42d: Cylinder connection 13, 23, 33, 43... Perforated cylinder 13a, 23a, 33a, 43a...Poly-hole cylindrical section 13b, 23b, 33b: Cylindrical body boss 13c, 23c, 33c, 43c...Open end 33f...other end closed 43g... Open end 13d, 23d, 33d, 43d...Axial space 13e, 23e, 33e, 43e...Deceleration separation part 101 Electric motor 102...Solution to be stirred 103...container

Claims

1. A blade portion connected to a rotating shaft and rotating around the rotating shaft; a porous cylinder surrounding the blade portion, connected to the rotating shaft and rotating around the rotating shaft, the central axis of the porous cylinder being concentric with the rotating shaft; The porous cylinder has at least one open end, and has an axial space between the open end and the blade.

2. 2. The agitator blade according to claim 1, further comprising a deceleration separation portion between an inner wall surface of the porous cylinder and the tip of the blade portion.

3. 3. The agitator blade according to claim 1 or 2, characterized in that the other end of the porous cylinder is open, and the blade portion is positioned approximately at the center of the axial length of the porous cylinder.

4. 3. The agitating blade according to claim 1, wherein the other end of the porous cylinder is closed, and the blade portion is disposed in the vicinity of the other closed end.

5. An agitator blade as described in any one of claims 1, 2 or 4, characterized in that the other end of the porous cylinder is closed, and the closed surface and / or the blade portion arranged in the vicinity of the other closed end is provided with a convex inclination from the outer periphery toward the center.

6. 6. The agitator according to claim 1, wherein the radius of the blade portion is equal to or smaller than (1 / √2) of the inner diameter of the porous cylinder.

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