Mixing body, stirring blade, stirring method, static fluid mixer, and static fluid mixing method

Abstract

To provide a mixing body which can suppress blockage and can mix even fluids containing particles with high efficiency, a stirring blade, and a static fluid mixer.SOLUTION: A mixing body 1 comprises a plurality of columnar bodies 12a, and two support plates 11 which are so located as to face each other with the columnar bodies 12a interposed therebetween. The columnar bodies 12a are arranged in a plurality of rows, and an inflow and outflow hole 111 for fluids to flow in and out is formed at a center of one or both of two support plates 11. The fluids flown in from the inflow and outflow hole 111 are mixed by division, confluence and so on when circulating between the plurality of columnar bodies 12a arranged in the plurality of rows, and flows out from an outer periphery of the mixing body 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a technique for mixing or stirring fluids, and relates to a mixture, a stirring blade, a stirring method, a static fluid mixer, and a static fluid mixing method.

Background Art

[0002] As an apparatus for mixing or stirring fluids, those that dynamically rotate a stirring blade disposed in the fluid in a stirring tank are widely used. On the other hand, statically, a static fluid mixer called a static mixer is widely used.

[0003] As the stirring blade, blade types such as disk turbine blades are widely used, but the stirring blade described in Patent Document 1 is also used to increase the stirring efficiency. The stirring blade shown in FIG. 17 of Patent Document 1 has a high stirring effect because the fluid flows in a complicated manner through the first through-hole through which the fluids communicate.

[0004] On the other hand, as the static fluid mixer, the in-line stationary type mixing device described in Patent Document 2 is widely used. On the other hand, the stationary type mixing device shown in FIG. 12 of Patent Document 1 has a higher mixing effect than the in-line stationary type mixing device described in Patent Document 2 depending on the conditions because the fluid flows in a complicated manner through the first through-hole through which the fluids communicate.

[0005] However, the stirring blade and the stationary type mixing device described in Patent Document 1 have a problem that the first through-hole through which the fluids communicate is blocked by solids such as particles contained in the fluid or particles generated by the reaction of the fluid because the fluid flows in a complicated manner through the first through-hole through which the fluids communicate.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

[0007] The present invention has been made in view of the above-mentioned problems, and relates to a technology for stirring or mixing fluids, and to a technology that can suppress clogging and mix with high efficiency even when the fluid contains particles, as a mixture, stirring blade, stirring method, static fluid mixer, and static fluid mixing method. [Means for solving the problem]

[0008] The mixture according to the present invention is It comprises a plurality of columnar bodies and two support plates positioned opposite each other, sandwiching the plurality of columnar bodies. In the center of one or both of the two support plates, an inlet / outlet hole is formed to allow fluid to flow in and out. The plurality of columnar bodies are, The arrangement includes a staggered pattern in part, perpendicular to the direction in which the fluid flows in and out. They are arranged in multiple rows, The cross-sectional shapes of the plurality of columnar bodies are the same or similar. It is a mixture characterized by the following features.

[0009] Another aspect of the present invention is, The stirring blade is characterized in that the mixture is attached to a rotating shaft that is driven to rotate.

[0010] Furthermore, another aspect of the present invention is, A static fluid mixer for mixing fluids flowing inside a pipe, The static fluid mixer comprises the mixture, One support plate of the mixture does not have an inlet / outlet hole, while the other support plate has an inlet / outlet hole. The other support plate is a static fluid mixer characterized by having an outer shape that is approximately the same as or larger than the inner diameter of the pipe. A static fluid mixer for mixing fluids flowing inside a pipe, The static fluid mixer comprises the mixture, One support plate of the mixture does not have an inlet / outlet hole, while the other support plate has an inlet / outlet hole. The static fluid mixer is characterized in that the other support plate has an outer shape that is substantially the same as or larger than the inner diameter of the pipe.

Advantages of the Invention

[0011] As described above, according to the mixture, stirring blade, stirring method, static fluid mixer, and static fluid mixing method according to the present invention, since the fluid flows while repeatedly dividing and merging between a plurality of columnar bodies arranged in a plurality of rows, even if the fluid contains solids such as particles, blockage can be suppressed, and stirring or mixing can be performed with high mixing efficiency.

Brief Description of the Drawings

[0012] [Figure 1] It is an exploded perspective view showing the mixture of Embodiment 1. [Figure 2] It is a cross-sectional view showing the relationship between the support plate, cylindrical body, spacer, bolt, and nut that constitute the mixture of Embodiment 1. [Figure 3] It is a perspective view showing the support plate that constitutes the mixture of Embodiment 1. [Figure 4] It is a schematic cross-sectional view showing the state in which the fluid F flows inside the mixture of Embodiment 1. [Figure 5] It is a schematic horizontal cross-sectional view showing the state in which the fluid F flows inside the mixture of Embodiment 1. [Figure 6] It is an exploded perspective view showing the mixture of Embodiment 2. [Figure 7] It is a cross-sectional view showing the relationship between the support plate, cylindrical body, intermediate plate, spacer, bolt, and nut that constitute the mixture of Embodiment 2. [Figure 8] It is a plan view showing the intermediate plate that constitutes the mixture of Embodiment 2. [Figure 9] In Modification 1 of the mixture, a plan view (Fig. 9(a)) in which rectangular prisms with a rectangular cross-section are arranged in a staggered pattern, a plan view (Fig. 9(b)) in which cylindrical bodies with a circular cross-section and elliptical cylinders with an elliptical cross-section are arranged in a staggered pattern, a plan view (Fig. 9(c)) in which elliptical cylinders with an elliptical cross-section are arranged in a spiral pattern, and a plan view (Fig. 9(d)) in which plate-like bodies are arranged radially. [Figure 10]Perspective view showing the positioning plate and the cover plate in Modification Example 2 of the mixture (Fig. 10(a)), plan view of the positioning plate (Fig. 10(b)), and plan view of the cover plate (Fig. 10(c)). [Figure 11] Cross-sectional view showing the relationship between the positioning plate, the cover plate, the columnar body, the spacer, the bolt, and the nut in Modification Example 2 of the mixture. [Figure 12] Exploded perspective view when a cylindrical body is used in Modification Example 3 of the mixture (Fig. 12(a)), and exploded perspective view when a tubular body is used (Fig. 12(b)). [Figure 13] Exploded perspective view showing the stirring blade according to the embodiment. [Figure 14] Schematic cross-sectional view showing a stirring device provided with the stirring blade according to the embodiment. [Figure 15] Schematic cross-sectional view showing Modification Example 1 of the stirring blade (Fig. 15(a)), and schematic cross-sectional view showing Modification Example 2 (Fig. 15(b)). [Figure 16] Schematic plan view showing Modification Example 3 of the stirring blade (Fig. 16(a)), and schematic plan view showing Modification Example 4 (Fig. 16(b)). [Figure 17] Schematic cross-sectional view showing the static fluid mixer according to the embodiment disposed between flanges in a piping path. [Figure 18] Schematic cross-sectional view showing the static fluid mixer according to another embodiment disposed between flanges in a piping path. [Figure 19] Exploded perspective view showing a stirrer provided with a mixture on a pedestal embedded with magnets (Fig. 19(a)), and perspective view showing a stirrer provided with a mixture on a pedestal with a rod-shaped stirrer attached (Fig. 19(b)).

Embodiments for Carrying Out the Invention

[0013] (Embodiment 1 of the mixture) As shown in Figure 1, the mixed body 1 consists of multiple cylindrical bodies 12a with a circular cross-section and a cylindrical spacer 14 arranged between two substantially disc-shaped support plates 11 as columnar bodies 12. Bolts 13a are inserted inside the spacers 14 and, together with nuts 13b, integrally fix the mixed body 1 as fastening means.

[0014] As shown in Figure 3, the support plate 11 has an inlet / outlet hole 111 in the center through which fluid flows in or out, and the same number of recessed holes 112 (24 in this case) as the cylindrical body 12a are arranged in two rows around the circumference and in a staggered pattern in the radial direction. Near the outer circumference, four stepped bolt holes 113 are arranged at 90-degree intervals as fastening through holes. The stepped bolt holes 113 have a stepped structure consisting of a through hole 113a and a stepped portion 113b.

[0015] Referring also to Figure 2, the recessed hole 112 does not penetrate the support plate 11, and its inner diameter is formed to be slightly larger than the outer diameter of the cylindrical body 12a. Therefore, the longitudinal end of the cylindrical body 12a fits into the recessed hole 112, positioning the cylindrical body 12a on the support plate 11. The multiple cylindrical bodies 12a are arranged in a staggered pattern radially, with approximately the same pitch circumferentially on the inner and outer sides in a plan view of the mixed body 1, according to the arrangement of the recessed holes 112 in the support plate 11. The inner diameter of the stepped portion 113b of the stepped bolt hole 113 is slightly larger than the outer diameter of the spacer 14. Therefore, the thick portion of the spacer 14 rests on the stepped portion 113b, positioning the spacer 14.

[0016] As described above, in the mixture 1, the cylindrical body 12a and the spacer 14 are positioned by the recessed holes 112 and stepped bolt holes 113 located in the two support plates 11. Therefore, by tightening the bolts 13a and nuts 13b that pass through the spacer 14, the two support plates 11 sandwich and fix the cylindrical body 12a and the spacer 14, thus forming the mixture 1. A hollow portion 15 is formed in the center of the mixture 1, which is connected to the inlet / outlet holes 111 of the support plates 11.

[0017] Figures 4 and 5 show the flow inside the mixture 1 when fluid F is supplied to the mixture 1 having the above structure. Figure 4 is a vertical cross-sectional view taken along the BB arrow in Figure 5, and Figure 5 is a horizontal cross-sectional view taken along the AA arrow in Figure 4. As shown in Figure 4, in a cross-sectional view of the mixture 1, when fluid F is supplied from the inlet / outlet holes 111 of the upper and lower support plates 11 of the mixture 1, the fluid F flows into the hollow section 15 surrounded by a plurality of cylindrical bodies 12a, flows through the inside of the mixture 1 from the inner circumference to the outer circumference, and flows out from the outer circumference. Then, as shown in Figure 5, as the fluid flows between the plurality of cylindrical bodies 12a arranged in a staggered pattern in the radial direction inside the mixture 1, it is mixed by repeatedly splitting and merging.

[0018] As can be seen from Figure 5, in a horizontal cross-sectional view of the mixture 1, all the spaces through which the fluid F flows are in communication. Therefore, even if the fluid F contains particles, it is possible to flow the fluid F from the hollow section 15 to the outer periphery while suppressing blockage of particles between the multiple cylindrical bodies 12a. Furthermore, cleaning the mixture 1 after use is also easy. In this case, one of the two support plates 11 may not have an inlet / outlet hole 111, and the fluid F may be supplied only from the inlet / outlet hole 111 of the other support plate 11.

[0019] Conversely, fluid F may be supplied from the outer circumference of the mixture 1 by appropriate means. In this case, fluid F flows from the outer circumference to the inner circumference between the cylindrical bodies 12a inside the mixture 1, passes through the hollow section 15, and flows out through the inlet / outlet holes 111 of the two support plates 11. As it flows between the multiple cylindrical bodies 12a arranged in a staggered pattern inside the mixture 1, it is mixed by repeatedly splitting and merging. In this case as well, one of the two support plates 11 may not have an inlet / outlet hole 111, and fluid F may flow out only through the inlet / outlet hole 111 of the other support plate 11.

[0020] Furthermore, in the mixed body 1, if the stepped bolt hole 113 and the cylindrical body 12a are located close together, it is not always necessary to place a spacer 14 around the outer circumference of the bolt 13a. This is because, since multiple cylindrical bodies 12a are arranged between the two support plates 11, the cylindrical bodies 12a can be fixed between the two support plates 11 by tightening the bolt 13a and nut 13b, even without a spacer 14, thereby forming the mixed body 1. By not using a spacer 14, the number of parts can be reduced.

[0021] As the bolt 13a, a double-ended male-threaded shaft with male threads at both ends may be used. In this case, the length of the cylindrical portion of the double-ended male-threaded shaft is made approximately the same as the length of the spacer 14, and its outer diameter is made slightly smaller than the inner diameter of the stepped portion 113b of the stepped bolt hole 113 of the support plate 11. Then, the mixed body 1 can be formed by inserting the male threads of the double-ended male-threaded shaft through the through hole 113a of the stepped bolt hole 113 and fastening it with the nut 13b. Alternatively, the outer diameter of the cylindrical portion of the double-ended male-threaded shaft may be made larger than the inner diameter of the stepped portion 113b of the bolt hole 113, and its length may be made shorter than the cylindrical body 12a by a length equivalent to twice the depth of the stepped portion 113b of the stepped bolt hole 113.

[0022] Furthermore, a double-ended female-threaded shaft, which has female threads at both ends, may be used as the bolt 13a and fastened with a tightening bolt from the outside of the support plate 11. In this case, the length of the double-ended female-threaded shaft is made approximately the same as the length of the spacer 14, and its outer diameter is made slightly smaller than the inner diameter of the stepped portion 113b of the stepped bolt hole 113 of the support plate 11. Then, the composite body 1 can be formed by fastening the double-ended female-threaded shaft with a tightening bolt that passes through the hole portion 113b of the stepped bolt hole 113 from the outside of the support plate 11. Alternatively, the outer diameter of the double-ended female-threaded shaft may be made larger than the inner diameter of the bolt hole 113, and its length may be made shorter than the cylindrical body 12a by a length equivalent to twice the depth of the stepped portion 113b of the stepped bolt hole 113.

[0023] (Embodiment 2 of the mixture) The mixture 1A according to Embodiment 2 differs from the mixture 1 according to Embodiment 1 in that, as shown in Figure 6, one intermediate plate 16 is disposed between two support plates 11, and a bolt 13a is inserted through spacers 14a and 14b disposed on either side of the intermediate plate 16. The other configurations are the same as the mixture 1 according to Embodiment 1.

[0024] As shown in Figure 8, the intermediate plate 16 has a central through hole 161, multiple columnar body through holes 162, and four bolt holes 163 for fastening, each of which is the same number and position as the inlet / outlet holes 111, multiple recessed holes 112, and stepped bolt holes 113 of the support plate 11. The inner diameters of the central through hole 161 and the bolt holes 163 are approximately the same as the through holes 113a of the inlet / outlet holes 111 and stepped bolt holes 113 of the support plate 11, respectively. The inner diameters of the multiple columnar body through holes 162 are approximately the same as the inner diameters of the recessed holes 112 of the support plate 11. In order to maintain the distance between each support plate 11 and the intermediate plate 16, two spacers 14a and 14b are placed around the outer circumference of the bolt 13a, with the intermediate plate 16 in between.

[0025] Referring also to Figure 7, in the mixture 1A, the cylindrical body 12a passes through the columnar body through-hole 162 of the intermediate plate 16 disposed between the two support plates 11, and its end is positioned by the recessed holes 112 of the two support plates 11. The spacers 14a and 14b are positioned by the stepped portion 113b of the stepped bolt holes 113 of the two support plates 11. Therefore, by tightening nuts 13b onto bolts 13a that are positioned to pass through the spacers 14a and 14b and the bolt holes 163 of the intermediate plate 16, the support plates 11 and the intermediate plate 16 are fixed in place, sandwiching the cylindrical body 12a and the spacers 14a and 14b, thereby forming the mixture 1A.

[0026] When fluid F is supplied by appropriate means from the inlet / outlet hole 111 of the support plate 11 of the mixture 1A having the above configuration, the fluid F flows between each cylindrical body 12a inside the mixture 1A from the hollow portion 15 toward the outer circumference, and flows out from the outer circumference, similar to the case of mixture 1. As the fluid F flows through the multiple cylindrical bodies 12a arranged in a staggered pattern from the inner circumference toward the outer circumference inside the mixture 1A, it is mixed by repeatedly splitting, merging, etc.

[0027] In the mixture 1A shown in Figure 6, there is one intermediate plate 16 and the cylindrical body 12a is divided into two in the longitudinal direction. However, the cylindrical body 12a may be divided into three or more in the longitudinal direction by arranging two or more intermediate plates 16 and arranging spacers 14 between the support plate 11 and the intermediate plates 16, and between the intermediate plates 16 themselves.

[0028] As described above, by creating a mixture 1A with the longitudinal direction of the mixture 1 separated by the intermediate plate 16, frictional resistance acts perpendicular to the flow direction of the fluid F from the surface walls of the support plate 11 and the surface walls of the intermediate plate 16. Therefore, even when the cylindrical body 12a is long, the velocity distribution of the fluid F in each section separated by the support plate 11 and the intermediate plate 16 becomes closer to uniform compared to the case where there are only two support plates 11, so that the fluid F can flow more uniformly in a direction perpendicular to the longitudinal direction of the cylindrical body 12a. This is particularly effective when the cylindrical body 12a is long, when applying the mixture to a stirring blade as described later.

[0029] (Variation 1 of the mixture) In mixtures 1 and 1A, cylindrical bodies 12a with a circular cross-section are used as columnar bodies 12, but the invention is not limited to this. For example, instead of cylindrical bodies 12a, rectangular prism bodies 12b of different sizes with rectangular cross-sections may be arranged radially and in a staggered pattern around the circumference, as shown in Figure 9(a). By using rectangular prism bodies 12b, the shear force experienced by the fluid F as it passes through the mixture 1 increases, resulting in increased flow resistance. However, the mixing efficiency can be increased by the vortices generated when the fluid passes near the corners of the rectangular prism bodies 12b. By reducing the gaps between multiple rectangular prism bodies 12b, the shear force acting on the fluid F can be further increased, thereby increasing the mixing efficiency.

[0030] Furthermore, as shown in Figure 9(b), cylindrical bodies 12a may be combined with elliptical prisms 12c of different sizes and with elliptical cross-sections, or elliptical prisms 12c of the same size may be arranged spirally as shown in Figure 9(c). In addition, flattened plate-like bodies 12d may be arranged radially as shown in Figure 9(d). By arranging elliptical prisms 12c, whose circumferential cross-sectional area increases from the inner circumference to the outer circumference, as shown in Figure 9(b), the fluid velocity when flowing between the elliptical prisms 12c near the outer circumference of the mixture 1 increases compared to the case in Figure 5 where only cylindrical bodies 12a of the same size are arranged, thus increasing fluid turbulence and improving mixing efficiency. Also, by arranging elliptical prisms 12c spirally as shown in Figure 9(c), the flow resistance when rotating the mixture 1 can be reduced, allowing for efficient fluid mixing. Furthermore, by arranging the flattened plate-like body 12d as shown in Figure 9(d), the flow resistance when rotating the mixture 1 increases, but the generation of vortices and other factors promotes mixing more effectively than when cylindrical bodies 12a or elliptical cylinders 12c are used. Note that in Figures 9(a) to 9(d), the stepped bolt holes 113 of the support plate 11 are omitted.

[0031] Furthermore, while Figure 9(a) shows three rows of rectangular prisms 12b arranged in the circumferential direction, and Figure 9(b) shows a total of four rows of cylindrical bodies 12a and elliptical prisms 12c arranged in the circumferential direction, the arrangement is not limited to these, and five or more rows may be arranged in the circumferential direction. In addition, the columnar bodies 12 may be any shape other than cylindrical bodies 12a, rectangular prisms 12b, and elliptical prisms 12c, such as triangular prisms with a triangular cross-section. Also, in order to reduce the weight of the mixture 1, hollow materials such as tubular bodies may be used instead of solid rod-shaped materials such as cylindrical bodies 12a. For example, a cylindrical tubular body with an annular cross-section, such as a spacer 14, may be used, or a hollow rectangular tubular body or elliptical tubular body may be used instead of rectangular prisms 12b and elliptical prisms 12c. This is because the effect of mixing the fluid is the same whether the material is solid or hollow.

[0032] (Variation 2 of the mixture) As shown in Figure 10(a), the support plate 11 constituting the mixture 1 may be formed from a positioning plate 17 (Figure 10(b)) and a cover plate 18 (Figure 10(c)). In this case, the positioning plate 17 has a central through hole 171 in the center, the same number of positioning through holes 172 around the circumference as the cylindrical body 12a, and four bolt holes 173 near the outer circumference, which are positioned in the same locations as the inlet / outlet holes 111, recessed holes 112, and stepped bolt holes 113 of the support plate 11. On the other hand, the cover plate 18 has a central through hole 181 in the center and four bolt holes 182 near the outer circumference, which are positioned in the same locations as the inlet / outlet holes 111 and stepped bolt holes 113 of the support plate 11.

[0033] The inner diameter of the central through-hole 171 of the positioning plate 17 and the inner diameter of the central through-hole 181 of the cover plate 18 are the same as the inner diameter of the inlet / outlet hole 111 of the support plate 11. The inner diameter of the positioning through-hole 172 of the positioning plate 17 is the same as the inner diameter of the recessed hole 112 of the support plate 11. The inner diameter of the bolt hole 173 of the positioning plate 17 and the inner diameter of the bolt hole 182 of the cover plate 18 are the same as the inner diameter of the through-hole 113a of the stepped bolt hole 113 of the support plate 11. The length of the spacer 14 is shorter by a length equivalent to twice the depth of the stepped portion 113b of the stepped bolt hole 113 compared to when using the support plate 11 in Figure 1. Therefore, as shown in Figure 11, by stacking the positioning plate 17 and the cover plate 18, the same shape as the support plate 11 can be achieved, and the mixture 1 can be formed in the same way as in Figure 1 when using the support plate 11.

[0034] (Variation 3 of the mixture) Alternatively, as shown in Figure 12(a), the support plate 11 may be replaced with a positioning plate 17, and the cylindrical body 12a may be directly welded to the positioning through hole 172 of the positioning plate 17 to form a hybrid body 1. In this case, a male thread may be applied to one end of the cylindrical body 12a, a female thread may be applied to the positioning through hole 172 of one of the positioning plates 17, and after screwing one end of the cylindrical body 12a into the positioning through hole 172 of one of the positioning plates 17, the other end of the cylindrical body 12a may be welded to the positioning through hole 172 of the other positioning plate 17. Alternatively, as shown in Figure 12(b), if a cylindrical body 12e is used instead of a cylindrical body 12a, the mixed body 1 may be formed by welding the cylindrical body 12e to the positioning through hole 172 of the positioning plate 17, then placing a cover plate 18 on top of the positioning plate 17 and fixing it by welding or other appropriate means, or the fluid may be allowed to pass through the inside of the cylindrical body 12e without placing the cover plate 18 on top of the positioning plate 17. If an intermediate plate 16 is placed between the positioning plates 17, it may be welded to an appropriate position on the cylindrical body 12a or cylindrical body 12e, but it may be sufficient to weld only to the cylindrical body 12a or cylindrical body 12e on the outer circumference, rather than welding to all of the cylindrical body 12a or cylindrical body 12e. These modifications are effective when using the mixed body 1 in large-scale equipment such as water treatment facilities.

[0035] (Agitator blade) Figure 13 is an exploded perspective view of a stirring blade 2 equipped with a mixture 1A according to an embodiment of the stirring blade. A support plate 11a, which has a cross-shaped support member 114 provided in the inlet / outlet hole 111, is placed on the upper part of the mixture 1A, and a rotating shaft 21 is attached to the center of the support member 114 by an appropriate method such as screwing it in to constitute the stirring blade 2. As shown in Figure 14, in a stirring device in which this stirring blade 2 is installed inside a stirring tank T containing a fluid F, when the stirring blade 2 is rotated by a motor (not shown), the fluid F held inside the stirring blade 2 is biased radially outward by the action of centrifugal force. The biased fluid F flows substantially radially from the inner circumference to the outer circumference between the multiple cylindrical bodies 12a inside the stirring blade 2 and is discharged from the outer circumference of the stirring blade 2. Accordingly, the fluid F inside the stirring tank T flows into the hollow part 22 inside the stirring blade 2 from the upper and lower support plates 11a, 11 of the stirring blade 2, so the fluid F is circulated inside the stirring tank T.

[0036] As described above, as the fluid F flows substantially radially from the inner circumference to the outer circumference inside the stirring blade 2, it is divided and merged as it flows between the multiple cylindrical bodies 12a as shown in Figure 5, and is further mixed by repeatedly circulating within the stirring tank T through turbulence, vortices, collisions, etc. At this time, in a horizontal cross-sectional view of the stirring blade 2, the spaces between the multiple cylindrical bodies 12a are all in communication, so even if the fluid F contains solid components such as particles, blockage of the gaps between the multiple cylindrical bodies 12a is suppressed. For this reason, the stirring blade 2 can be used even if the fluid F contains particles, and cleaning after use is also easy.

[0037] (Variations of agitator blades) The stirring blade 2 shown in Figure 13 has a rotating shaft 21 connected to the upper support plate 11. However, as shown in Figure 15(a), the stirring blade 2A may also be constructed by attaching the rotating shaft 21 to an intermediate plate 16a, which has a cross-shaped support member 164 in the central through hole 161, similar to the support plate 11a. Alternatively, as shown in Figure 15(b), the stirring blade 2B may have two or more intermediate plates 16, or the stirring blade 2 may be constructed by attaching the rotating shaft 21 to a mixture 1 without intermediate plates 16, as shown in Figure 1. In these cases as well, one of the two support plates 11 may not have an inlet / outlet hole 111, and the fluid F may be introduced only through the inlet / outlet hole 111 of the other support plate 11, or a combination of a positioning plate 17 and a cover plate 18 may be used instead of the support plates 11.

[0038] In the stirring blade 2, stirring blades 2C and 2D may be made by arranging cylindrical bodies 12a as shown in Figures 16(a) and 16(b). Figure 16(a) shows cylindrical bodies 12a arranged in a staggered and cross shape on a roughly cross-shaped support plate 11b, and Figure 16(b) shows cylindrical bodies 12a arranged across the entire surface and in a grid pattern on a roughly rectangular support plate 11c. By arranging the cylindrical bodies 12a in this way, it is possible to mix the fluid F held in the stirring tank T by rotating the stirring blades 2C and 2D in the stirring tank T. When the cylindrical bodies 12a are arranged circumferentially as in the stirring blade 2, for example, if a highly viscous fluid F rotates together with the stirring blade 2 and becomes a steady flow, arranging the cylindrical bodies 12a as in the stirring blades 2C and 2D makes the flow of the fluid F unsteady, increases turbulence, and promotes mixing. Furthermore, instead of the cylindrical body 12a, a rectangular prism 12b, an elliptical prism 12c, a plate-like body 12d, as shown in Figures 9(a) to 9(d), or a cylindrical body 12e or other cross-sectional shapes may also be used.

[0039] (static fluid mixer) Figure 17 is a schematic cross-sectional view of a static fluid mixer 3 equipped with a mixer 1 according to an embodiment of the static fluid mixer, which is arranged between the flanges 32 of a pipe 31. In the static fluid mixer 3, the upstream first support plate 11d and the downstream third support plate 11f do not have inlet / outlet holes 111, unlike the support plate 11 in the mixer 1 shown in Figure 4. On the other hand, the second support plate 11e, which is arranged between the first support plate 11d and the third support plate 11f, has inlet / outlet holes 111, and its outer diameter is sized to be inscribed within the bolts 13a for fastening the flanges 32, and is sandwiched between the flanges 32 by bolts 13a and nuts 13b.

[0040] When fluid F is supplied to such a static fluid mixer 3 by an appropriate pumping means, the fluid F is prevented from moving in a straight line by the first support plate 11d on the upstream side (left side), passes through the gap between the inner wall of the pipe 31 and the outer circumference of the first support plate 11d, reaches the first annular space 33a on the outer circumference of the upstream side of the static fluid mixer 3, flows from the outer circumference to the inner circumference between the multiple cylindrical bodies 12a, and reaches the first hollow section 34a. The fluid F that reaches the first hollow section 34a then passes through the inlet / outlet hole 111 of the second support plate 11e to reach the second hollow section 34b, flows from the inner circumference to the outer circumference between the multiple cylindrical bodies 12a, reaches the second annular space 33b on the outer circumference of the downstream side, passes through the gap between the inner wall of the pipe 31 and the third support plate 11f, and reaches the inside of the pipe 31.

[0041] As described above, the fluid F flows approximately radially between the multiple cylindrical bodies 12a constituting the static fluid mixer 3, from the outer circumference to the inner circumference, or vice versa. During this process, the fluid F is mixed by repeatedly splitting and merging as it flows between the multiple cylindrical bodies 12a arranged in a staggered pattern in the radial direction. With such a static fluid mixer 3, clogging is less likely even if the fluid F contains particles, and cleaning is easy.

[0042] (Other embodiments of static fluid mixers) Figure 18 is a schematic cross-sectional view of static fluid mixer 3A, another embodiment of the static fluid mixer, which is installed between the flanges 32 of piping 31. In static fluid mixer 3A, the cylindrical body 12a of static fluid mixer 3 is extended in the longitudinal direction, passing through the first support plate 11d and the third support plate 11f. A fourth support plate 11g is provided at the upstream end, having an outer diameter that is substantially in line with the inner wall of piping 31 and an inlet / outlet hole 111 in the center through which fluid F flows in. A fifth support plate 11h is provided at the downstream end, having an outer diameter that is substantially in line with the inner wall of piping 31, similar to the fourth support plate 11g, and an inlet / outlet hole 111 in the center through which fluid F flows out. The rest of the structure is the same as that of static fluid mixer 3.

[0043] When fluid F is supplied to such a static fluid mixer 3A by an appropriate pumping means, as shown in Figure 18, the fluid F flows into the first hollow section 34c inside the static fluid mixer 3A from the inlet / outlet hole 111 of the upstream fourth support plate 11g, and since its straight-line flow is obstructed by the first support plate 11d, it flows between the multiple cylindrical bodies 12a and reaches the first annular space 33c. The fluid F that has reached the first annular space 33c is obstructed by the second support plate 11e, so it passes between the multiple cylindrical bodies 12a between the first support plate 11d and the second support plate 11e to reach the second hollow section 34d, and further passes through the inlet / outlet hole 111 of the second support plate 11e to reach the third hollow section 34e. Subsequently, the fluid F is prevented from traveling in a straight line by the third support plate 11f, so it passes between multiple cylindrical bodies 12a to reach the second annular space 33d, then passes between more multiple cylindrical bodies 12a to reach the fourth hollow section 34f, and finally reaches the inside of the piping 31 from the static fluid mixer 3A through the inlet / outlet hole 111 of the fifth support plate 11h. Since such a static fluid mixer 3A passes between more multiple cylindrical bodies 12a than the static fluid mixer 3, it can promote the mixing of the fluid F more effectively than the static fluid mixer 3.

[0044] (others) The mixture, stirring blade, and static fluid mixer according to the present invention can be used for various applications. As already mentioned, it is possible to mix liquids containing solid components such as particles, and even if the size of the particles is large, mixing can be performed while suppressing blockage by increasing the spacing between each columnar or plate-shaped body. Furthermore, even highly viscous liquids can be mixed by increasing the spacing between the columnar bodies to reduce the flow resistance during flow. In addition, it is possible to mix powders that have a certain degree of fluidity using the stirring blade.

[0045] The size of the mixture can be freely adjusted, and larger ones can be applied to large-scale stirring devices such as those used for floc formation in water treatment. In this case, by using columnar bodies 12 without corners or protrusions, such as cylindrical bodies 12a or cylindrical bodies 12e, the flocs can be coarsened while suppressing their destruction. On the other hand, for smaller ones, a stirring bar 4 can be made by fixing a small mixture 1 with bolts to a base 41 on which a magnet 42 is embedded, as shown in Figure 19(a), with bolt holes (not shown) arranged on top, or a stirring bar 4A can be made by fixing the mixture 1 with fasteners to a base 41A to which a rod-shaped stirring bar 43 is attached, as shown in Figure 19(b). These stirring bars 4 and stirring bars 4A can be placed inside a container such as a beaker containing a fluid and then placed on a magnetic stirrer to mix the fluid.

[0046] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than by the embodiments herein, and includes all modifications and variations in the sense and scope equivalent to the claims. [Explanation of Symbols]

[0047] 1 mixture 2. Agitator blades 3 Static fluid mixer 11 Support plate 12 Columnar body 12a Cylinder 14 Spacers 15 (Hollow part of the mixture) 16 Intermediate plate 17 Positioning plate 18 Cover plate 21 Rotation axis 22 Hollow section (of the stirring blade) 31 Piping 32 flange 33 Circular Space 34 Hollow section (of the static fluid mixer) 4. Stirring bar 41 Pedestal 42 Magnets 43. Rod-shaped stirring bar F fluid T Stirring tank

Claims

1. It comprises a plurality of columnar bodies and two support plates positioned opposite each other, sandwiching the plurality of columnar bodies. In the center of one or both of the two support plates, an inlet / outlet hole is formed to allow fluid to flow in and out. The plurality of columnar bodies are arranged in multiple rows, some of which are arranged in a staggered pattern, perpendicular to the direction in which the fluid flows in and out. A mixture characterized in that the cross-sectional shapes of the plurality of columnar bodies are the same or similar.

2. In the mixture according to claim 1, One or more intermediate plates are provided between the two support plates. The mixture is characterized in that the intermediate plate has a central through-hole of approximately the same size and position as the inlet / outlet hole of the support plate, and the plurality of columnar bodies penetrate the intermediate plate.

3. In the mixture according to claim 1, The two support plates are provided with recessed holes for positioning the plurality of columnar bodies, The two support plates are provided with a plurality of opposing fastening through holes, The mixture is characterized in that it is integrally fixed by fastening means provided in each of the multiple opposing fastening through holes of the support plate.

4. In the mixture according to any one of claims 1 to 3, The support plate is formed by a positioning plate and / or a cover plate, The positioning plate is provided with the same number of positioning through holes as the plurality of columnar bodies, and a plurality of fastening through holes, The positioning through-hole has substantially the same shape as the cross-sectional shape of the columnar body, and is slightly larger than the outer diameter shape of the columnar body. The mixture is characterized in that the cover plate is laminated on the positioning plate and has a plurality of fastening through holes at positions opposite to a plurality of fastening through holes in the positioning plate.

5. A stirring blade characterized in that the mixture according to any one of claims 1 to 4 is attached to a rotating shaft that is driven to rotate.

6. The stirring blade according to claim 5, The aforementioned support plate is characterized by having a substantially rectangular shape.

7. A method for stirring a fluid using a stirring blade according to claim 5 or 6, A stirring method characterized by including a step of causing the fluid that has flowed into the mixture through the inlet / outlet hole of the support plate to flow out from the outer periphery of the mixture by rotating the stirring blade.

8. A static fluid mixer for mixing fluids flowing inside a pipe, The static fluid mixer comprises the mixture according to any one of claims 1, 3, or 4. One support plate of the mixture does not have an inlet / outlet hole, while the other support plate has an inlet / outlet hole. A static fluid mixer characterized in that the other support plate has an outer shape that is approximately the same as or larger than the inner diameter of the pipe.

9. A static fluid mixing method for mixing a fluid flowing in a pipe using a static fluid mixer as described in claim 8, A step of causing the fluid that has flowed into the mixing body from the inlet / outlet hole of the support plate of the static fluid mixer to flow out from the outer periphery of the mixing body, or, A static fluid mixing method characterized by including the step of causing the fluid that has flowed into the mixture from the outer periphery of the mixture in the static fluid mixer to flow out through the inlet / outlet hole of the support plate.

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