JP2015083282A - Static mixing structure, fluid mixing method and mixed fluid manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a static mixing structure, a fluid mixing method and a mixed fluid manufacturing method capable of performing mixing while suppressing pressure loss in the static mixing structure which performs mixing of fluids in such a process that the fluids pass through a channel.SOLUTION: A plurality of sheets of planar mixing element parts 13 which spread in such a direction as to block a channel 12 are arranged leaving an interval along the channel 12 direction. A plurality of passage parts 14 which cause fluids to pass therethrough and a closing part 15 which blocks the passage of fluids are formed on the mixing element parts 13, and the mixing element parts 13 are arranged such that the downstream side of the passage parts 14 of one side mixing element parts 13 is closed by the closing parts 15 of the other side mixing element sides 13. Therein, when it is supposed that one side mixing element parts 13 and the other side mixing element parts 13 are overlapped onto a part of edge parts 17 on the passage parts 14 or the closing parts 15 of one side mixing element parts 13, and a part of edge parts 17 on the closing parts 15 or the passage parts 14 of the other side mixing element parts 13 on the same flat surface, adjacent edge parts 18 which come into contact with or come close to each other are formed.

Description

  The present invention relates to a static mixing structure that mixes fluids with the energy of the fluid itself, and more particularly to a static mixing structure that enables fluid mixing while suppressing pressure loss.

  As a static mixing device, for example, there is one disclosed in Patent Document 1 below. This static mixing device is configured by arranging a plurality of orifice plates on a cylindrical pipe. All these orifice plates have a plurality of holes so that they do not overlap between two adjacent orifice plates when viewed in the axial direction of the pipe. These holes are all round.

  Since it is such a structure, the fluid which entered into piping repeats a division | segmentation and confluence | merging, passing the hole of an orifice plate sequentially. As a result, the fluid is mixed.

  In other words, fluid mixing is performed by preventing the fluid that has passed through the hole from going straight, and the fluid that has passed through the hole is blocked by the hand going to divide and merge, and then passes between the orifice plates and then downstream. Flows into a near hole in the orifice plate.

  However, as described above, since the holes of the two adjacent orifice plates are circular and are arranged so that the holes do not overlap each other in the axial direction of the pipe, the pressure loss is large.

JP 2011-121038 A

  Accordingly, the main object of the present invention is to enable fluid mixing even when the pressure loss is small.

  For this purpose, the first means is a static mixing structure in which a plurality of plate-like mixing element portions extending in the direction of closing the flow path are provided in the flow path through which the fluid passes with a gap in the longitudinal direction of the flow path. The mixing element portion includes a plurality of passage portions that allow the fluid to pass therethrough and a blocking portion that blocks the passage of the fluid, and the mixing element portion includes a plurality of the mixing element portions. And the passage portion of one mixing element portion of the mixing element group is closed in the flow channel direction view by the closing portion of the other mixing element portion of the same mixing element group, The passing portion and the closing portion of the mixing element portion are disposed, and the passing portion of the mixing element portion of the mixing element group or the edge portion of the closing portion is small. The one mixing element portion and the adjacent portion at least in part and at least a part of the edge portion of the other mixing element portion adjacent to the mixing element portion as viewed in the flow path direction. This is a static mixing structure in which neighboring edges are formed in contact with or close to each other when it is assumed that other mixing element portions overlap on the same plane.

  The second means for solving the problem is that a plurality of plate-like mixing element portions extending in the direction of closing the flow path are disposed in the flow path through which the fluid passes with a gap in the longitudinal direction of the flow path. In the fluid mixing method of mixing the fluid using the static mixing structure, a plurality of passage portions for allowing the fluid to pass therethrough and a closing portion for preventing the passage of the fluid are formed in the mixing element portion. The mixing element unit includes a plurality of mixing element groups, and the passing unit of one mixing element unit of the mixing element group is the other mixing element unit of the same mixing element group. The passage portion and the closing portion of the mixing element portion are disposed so as to be closed in the flow path direction view by the closing portion, and one mixing element portion of the mixing element group At least a part of the edge in the passage part or the closing part and at least a part of the edge part in the closing part or the passage part of another mixing element part adjacent to the mixing element part in the flow channel direction view The adjacent mixing element portion and the adjacent other mixing element portion are adjacent to each other on the same plane to form adjacent edges that are adjacent to or adjacent to each other. The blocking portion of the adjacent other mixing element portion prevents the fluid passing through the passage portion from going straight and divides the fluid, and the fluid is adjacent to the passage portion adjacent to the blocking portion. This is a fluid mixing method in which fluids are mixed by quickly detouring and joining through an edge.

  According to a third means for solving the problem, a plurality of plate-like mixing element portions extending in the direction of closing the flow path are disposed in the flow path through which the fluid passes with a gap in the longitudinal direction of the flow path. A mixed fluid manufacturing method for manufacturing a mixed fluid using a static mixing structure, wherein a plurality of passage portions that allow the fluid to pass therethrough and a blocking portion that prevents passage of the fluid are formed in the mixing element portion. The mixing element unit includes a plurality of mixing element groups, and the passing unit of one mixing element unit of the mixing element group is the other mixing element unit of the same mixing element group. The passage portion and the closing portion of the mixing element portion are disposed so as to be closed in the flow path direction view by the closing portion of the mixing element, and one mixing element of the mixing element group At least a part of the edge of the passing part or the closed part of the part, and at least the edge of the closed part or the passing part of another mixing element part adjacent to the mixing element part in the flow channel direction view The one mixing element part is formed with a neighboring edge part that touches or is close to each other when it is assumed that the one mixing element part and the other adjacent mixing element part overlap on the same plane. The fluid that has passed through the passage part in the part is blocked by the blocking part of the other adjacent mixing element part to divide the fluid, and the fluid is passed to the passage part adjacent to the blocking part. In the mixed fluid manufacturing method, fluids are mixed by quickly detouring and joining through the adjacent edge portion.

  In these configurations, when the fluid flowing through the flow path flows into the mixing element group, the blocking portion of the mixing element portion divides the fluid, and the passage portion joins the fluid and passes it downstream. In another mixing element part adjacent on the downstream side of the mixing element part, the blocking part blocks the fluid that has passed through the upstream passing part, and the fluid is divided as described above, and the passing part joins the fluid. And let it flow downstream. In the process in which such a flow is sequentially performed, the fluid that has passed through the passage portion of the upstream mixing element portion flows more in the vicinity edge portion and the vicinity portion of the close portion that is present in the flow passage direction view, The fluid is mixed.

  According to the present invention, since the fluid is divided and merged while ensuring the fluidity of the fluid, the fluid can be mixed even if the pressure loss is low.

The perspective view which shows the schematic structure and effect | action of a static mixing structure. The perspective view of the tubular body to which the static mixing structure is applied. The disassembled perspective view of the tubular body to which the static mixing structure is applied. Sectional drawing of the tubular body of FIG. The disassembled perspective view of a mixing unit. The top view of a mixing element part. Sectional drawing (FIG. 7 (a)) of the mixing element part in a mixing unit, and explanatory drawing of an operation state (FIG. 7 (a)). Sectional drawing (FIG. 8 (a), (b)) of the mixing element part in a mixing unit. The disassembled perspective view of a mixing unit. Explanatory drawing explaining the conditions for a flow analysis. Flow analysis results. Flow analysis results. Sectional drawing of the pipe body which applied the static mixing structure. The perspective view of a mixing member (FIG. 13 (a), (FIG.13 (b)). The perspective view of the mixing tube which applied the static mixing structure. The perspective view of the mixing element part and spacer which concern on another example. The top view (FIG. 16 (a)) of the mixing element part shown in FIG. 15, and sectional drawing (FIG.16 (b)) of a mixing element group. The perspective view of a mixing member. The top view of the mixing element part which concerns on another example.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing the schematic structure and operation of a static mixing structure 11, and this static mixing structure 11 mixes fluid by the energy of the fluid while the fluid passes through the flow path 12. is there. The mixing of the fluid is performed by a plurality of mixing element portions 13 spreading in the direction of closing the flow path 12. These mixing element portions 13 are arranged at intervals in the longitudinal direction of the flow path 12.

  The mixing element portion 13 has a size that covers the entire flow path 12, and the outer shape of the mixing element section 13 is formed in accordance with the cross-sectional shape of the portion of the flow path 12 where the mixing element portion 13 is provided. The flow path 12 in the example shown in FIG. 1 has a circular longitudinal cross-sectional shape in a direction orthogonal to the longitudinal direction, and the mixing element portion 13 is provided so as to spread in a direction orthogonal to the longitudinal direction of the flow path 12. It is. For this reason, the external shape of the mixing element part 13 is also circular. If the longitudinal cross-sectional shape of the flow path 12 is other than a circle, for example, a quadrangle, the outer shape of the mixing element portion 13 is formed in the same quadrangle.

  The thickness of the mixing element portion 13 is appropriately set according to conditions such as fluid properties, flow velocity, and flow rate. As the material of the mixing element portion 13, an appropriate material such as metal or synthetic resin can be used.

  The mixing element portion 13 has a plurality of passage portions 14 that allow the fluid to pass therethrough and a closing portion 15 that blocks the passage of the fluid so that the fluid is divided and merged as the fluid flows. The passage portion 14 may have a structure through which a fluid passes, and in this example, the passage portion 14 is formed by a through hole.

  A plurality of such mixing element sections 13 constitute a set of mixing element groups 16. And the passage part 14 of one mixing element part 13 in the mixing element group 16 is closed in the flow channel direction view by the closing part 15 of the other mixing element part 13 in the same mixing element group 16. The passage portion 14 and the closing portion 15 of the mixing element portion 13 are disposed. In the example illustrated in FIG. 1, a mixing element group 16 including two mixing element portions 13 is illustrated. In FIG. 1, three mixing element portions 13 are shown for convenience.

  The number of mixing element portions 13 required for the static mixing structure 11 may be any number that can form at least one set of mixing element groups 16. In the case of having two or more sets of mixing element groups 16, the number of mixing element units 13 to be arranged is not necessarily limited to an integral multiple of the number of mixing element units 13 constituting the mixing element group 16. For example, when two mixing element portions 13 constitute a set of mixing element groups 16, the static mixing structure 11 can be configured by including five mixing element portions 13.

  The closed portion 15 and the passage portion 14 that are in a closed / closed relationship when viewed in the flow path direction have neighboring edges 18 that contact or are close to each other when viewed in the flow path direction. That is, at least a part of the edge portion 17 in the passage portion 14 or the closing portion 15 of one mixing element portion 13 in the mixing element group 16 and the other adjacent to the mixing element portion 13 in the flow channel direction view. It is assumed that the one mixing element part 13 and the other adjacent mixing element part 13 overlap on the same plane with at least a part of the edge part 17 in the closing part 15 or the passing part 14 of the mixing element part 13. Neighboring edges 18 are sometimes formed that touch or are close to each other.

  An application example of the static mixing structure 11 having such a configuration will be described below.

  2 is a perspective view showing a part of the tube body 21 to which the static mixing structure 11 is applied, FIG. 3 is an exploded perspective view thereof, and FIG. 4 is a sectional view thereof.

  As shown in these drawings, the tubular body 21 forms a flow path 12 having a circular cross section, and has a large inner diameter on the inner peripheral surface on the upstream side of the tubular body 21 that is larger than the inner peripheral surface on the downstream side. A portion 22 is provided. The mixing unit 31 which is a main part of the static mixing structure 11 is held in a state in which the tip is in contact with the stepped portion 24 between the large diameter portion 22 of the tubular body 21 and the small diameter portion 23 on the downstream side thereof. .

  As shown in FIG. 5, the mixing unit 31 holds the mixing element portion 13 that is separate from the portion constituting the flow path 12, holds the mixing element portion 13, and holds the spacing between the mixing element portions 13. A spacer 32 is used. The mixing element unit 13 in the example of FIGS. 2 to 4 constitutes a mixing element group 16 as a set of two, and includes two mixing element groups 16 in succession. That is, each of the mixing element portion 13 and the spacer 32 has four pieces, and as shown in FIG. 5, the mixing element portion 13 and the spacer 32 are of one type and all have the same shape.

  As shown in FIG. 6, the mixing element portion 13 has a rotationally symmetrical shape as a whole including the shape of the portion having the passage portion 14 and the blocking portion 15. The passage portion 14 has a shape having at least two sides 17a extending from the center side to the outer periphery side, and is arranged in an inner peripheral portion and an outer peripheral portion in a portion excluding the central portion. Specifically, the edge portions 17 of all the passing portions 14 have a shape having two sides 17a extending straight from the center side to the outer peripheral side, and the space between these two sides 17a is more on the outer peripheral side than the center side portion. This part is wider in the circumferential direction. That is, the four passage portions 14 that are substantially fan-shaped in the inner peripheral side portion are arranged at equal intervals along the circumferential direction, and the four passage portions 14 that are formed in a substantially rectangular shape in the outer peripheral portion are It arrange | positions at equal intervals along the circumferential direction so that it may alternate with the passage part of a peripheral part.

  A portion excluding the passage portion 14 and the outer peripheral edge is a blocking portion 15, and the arrangement and shape of the blocking portion 15 are the same as the arrangement and shape of the passage portion 14. That is, there are four closed portions 15 between the four passage portions 14 in the inner peripheral portion and the four passage portions 14 in the outer peripheral portion.

  The central portion of the mixing element portion 13 that is inside the four passage portions 14 on the inner peripheral side portion is also a portion that prevents passage of fluid, and this portion is a central blocking portion 33.

  In forming the passage portion 14 and the blocking portion 15, the total area ratio of the passage portion 14 in the region where the passage portion 14 and the blocking portion 15 of the mixing element portion 13 are formed is equal to or greater than the approximate value of the total area ratio of the blocking portion 15. In addition, the total area ratio of the passing portion 14 of the mixing element portion 13 is set to be approximated in all the mixing element portions 13 constituting the mixing element group 16. The region where the passing portion 14 and the blocking portion 15 are formed is a range where portions other than the central portion and the outer peripheral edge of the mixing element portion 13 exist.

  When the mixed element group 16 is composed of two mixed element sections 13, the total area ratio of the passage section 14 is an approximate value of the total area ratio of the closed section 15, and three or more mixed elements are mixed. In the case of being constituted by the part 13, it becomes larger than the approximate value. By setting in this way, the total area ratio of the passing parts 14 of each mixing element part 13 is maximized, and the total area ratio of the passing parts 14 is uniform in all the mixing element parts 13 constituting the mixing element group 16. Or it will be in an almost equal state.

  That is, as described above, when the four passage portions 14 and the four closing portions 15 are provided in the inner peripheral portion and the outer peripheral portion, respectively, the passage portions 14 and the closing portions 15 extend in the radial direction. The angle between the two straight sides 17a is 45 degrees or about 45 degrees (an angle close to 45 degrees).

  When the interval between the two sides 17a extending from the center side to the outer peripheral side in the passage portion 14 and the closing portion 15 is set to 45 degrees, as shown in FIG. When the 13 is overlapped by being shifted by 45 degrees in the circumferential direction, as shown in the sectional view of FIG. 7A (cross-sectional view taken along the line AA in FIG. 6), all the passing portions 14 of one mixing element portion 13 are obtained. However, it is closed by the blocking portion 15 of the other mixing element portion 13 adjacent in the thickness direction of the mixing element portion 13, that is, in the flow channel direction view.

  At this time, the passing portion 14 and the blocking portion 15 of one mixing element portion 13 and the closing portion 15 and the passing portion 14 of the other mixing element portion 13 are in a state of complementing each other. A part of the edge 17 in the passage part 14 or the blocking part 15 of the element part 13 and a part of the edge part 17 of the other mixing element part 13 or the passage part 14 become the neighboring edge part 18. . Specifically, as shown in FIG. 6, a part of the edge portion 17 includes a two-side portion 18 a extending in the radial direction in the passage portion 14 in the inner peripheral portion and the outer peripheral portion, and a passage portion in the inner peripheral portion. 14 are an arc-shaped portion 18b extending in the circumferential direction on the outer peripheral side, and an arc-shaped portion 18c extending in the circumferential direction on the inner peripheral side of the passage portion 14 in the outer peripheral side portion.

  As shown in FIG. 7A, these neighboring edge portions 18 are arranged on a virtual extension line 35 extending in the flow path direction view.

  As described above, when it is assumed that the adjacent mixing element portions 13 are overlapped on the same plane, they may be in contact with each other, or may be overlapped as shown in FIG. As shown in (b), it may be slightly separated.

  Further, the four notches formed in the outer peripheral edge of the mixing element portion 13 are engaging recesses 34 that engage the spacer 32 so as not to be relatively rotatable. The engaging recess 34 is formed at a position corresponding to an intermediate position between the passage portions 14 on the outer peripheral side portion.

  The spacer 32 is made of synthetic resin or metal and has a short cylindrical shape corresponding to the size of the mixing element portion 13 as shown in FIG. A part of the cylindrical peripheral surface has a cut groove 36 that extends in the vertical direction and divides the spacer 32 in the circumferential direction, and can be expanded and contracted in the radial direction.

  On the upper end surface of the spacer 32, an engagement protrusion 37 that engages with the engagement recess 34 of the mixing element portion 13 is formed. The engagement recess 34 and the engagement protrusion 37 have a shape corresponding to fitting, and cannot be rotated relative to each other by engagement. The length of the engaging protrusion 37 is the same as the thickness of the mixing element portion 13.

  A connecting protrusion 38 extends from the distal ends of the engaging protrusions 37. The connection protrusion 38 is one of connection structures for connecting the spacers 32 to each other. Although the length of the connection protrusion 38 is set as appropriate, it may be, for example, approximately the same as the connection recess 39 of the mixing element portion.

  The connecting structure allows another mixing element portion 13 adjacent in the same direction as this spacer 32 to be arranged in the circumferential direction with a different angle with respect to another adjacent spacer 32. For this reason, a connecting recess 39 into which the connecting protrusion 38 is fitted is formed on the lower end surface of the spacer 32. The connecting recess 39 is formed at a position corresponding to an intermediate position of the connecting protrusion 38 in order to dispose the mixing element portions 13 by 45 degrees. The height of the connection recess 39 is a height corresponding to the connection protrusion 38.

  Since the spacer 32 has such a configuration, the length from the upper end position of the coupling recess 39 of the spacer 32 to the upper end surface of the spacer 32 (the base position of the engaging protrusion 37) is the gap between the mixing element portions 13. Corresponding length. This length is appropriately set according to desired mixing conditions.

  Further, as shown in FIG. 4, the thickness of the spacer 32 is set to a thickness corresponding to the difference between the inner diameter of the large diameter portion 22 and the inner diameter of the small diameter portion 23 of the tube body 21. Thereby, the inner peripheral surface of the small diameter portion 22 of the tube body 21 and the inner peripheral surface of the spacer 32 are flush with each other.

  As shown in FIG. 9, the mixing element portion 13 and the spacer 32 having such a structure are combined one by one, and then the required number, that is, at least two or more stages are stacked to form the mixing unit 31, which is shown in FIG. As shown in FIG.

  When the connecting protrusion 38 and the connecting recess 39 of the spacer 32 are connected when the mixing unit 31 is assembled, the adjacent mixing element portions 13 are automatically shifted in the circumferential direction by a predetermined angle, so that workability is good.

  Further, since the groove 32 is formed in the spacer 32, the insertion is easy if the diameter is slightly reduced when inserted into the large diameter portion 22 of the tube body 21. Since the spacer 32 is elastically restored and expanded in diameter after insertion, a good holding state with respect to the tubular body 21 is obtained.

  In the static mixing structure 11 configured as described above, fluids are mixed as follows. That is, as shown in FIG. 1, the closing portion 15 of the mixing element portion 13 located on the upstream side prevents the fluid from moving straight, divides the fluid, and flows it into the adjacent passage portion 14. In the passage portion 14, the divided fluids merge and flow down. The fluid that has flowed down is divided by being blocked again by the closing portion 15 of another mixing element portion 13 adjacent on the downstream side. Such division and merging of fluids are performed at multiple locations simultaneously and repeated.

  When the fluid flows in this way, as shown in FIG. 7B, the adjacent edge portion is included in the closed portion 15 between the adjacent mixing element portions 13 and a part of the edge portion 17 of the passage portion 14 in the flow channel direction view. Since 18 is formed, the fluid is blocked from moving straight by the closing portion 15 and changes its direction, and flows mainly to the adjacent passing portion 14. At this time, the total area ratio of the passage part 14 and the blocking part 15 is approximate, that is, substantially the same, and the total area ratio of the passage part 14 in the mixing element part 13 that is a set of two sheets is the largest, The area through which the fluid passes is large. For this reason, the fluid can be mixed while reducing the pressure loss.

  The supply mode of the plural types of fluids to be mixed is not limited. For example, a double pipe can be used to supply the fluid separately into the inside and the outside of the flow path 12. In this case, when the flow path 12 has a circular cross section, the fluid is supplied in a state where the fluids are concentrically divided.

  Since the inner peripheral surface of the small diameter portion 23 of the tubular body 21 and the inner peripheral surface of the spacer 32 are flush with each other, when the fluid flows, the fluid flow path 12 is not narrowed and is constant. From this point, the fluidity of the fluid can be secured.

  The mixing element portion 13 for dividing and merging the fluid is plate-shaped and has a configuration in which a passage portion 14 formed of a through-hole is formed. Therefore, the manufacture is easy and can be obtained at low cost.

  In addition, since the mixing element portion 13 has the central blocking portion 33, the shape of the blocking portion 15 obtained by forming the plurality of passage portions 14 can be stabilized. For this reason, durability can be obtained even when the flow rate of the fluid is high or the flow rate is large. In addition, since it is easy to obtain a rotationally symmetric shape, it contributes to easily obtaining a configuration in which the mixing element portions 13 are arranged at different angles in the circumferential direction as described above.

  Since the mixing element portion 13 has a configuration in which the mixing element portions 13 are arranged at different angles in the circumferential direction, the assembly structure is simple.

  Moreover, since all the mixing element portions 13 have the same shape, they can be manufactured at a lower cost and the management of the members is easy.

  Similarly, since all the spacers 32 have the same shape, they can be manufactured at low cost, and labor saving such as management of members can be achieved.

  In addition, since both the engaging structure and the connecting structure are constituted by protrusions (engaging protrusions 37, connecting protrusions 38) and recesses (engaging recesses 34, connecting recesses 39), the structure is simple. Assembly work is also easy. In addition, since the connecting protrusion 38 is integrally formed at the tip of the engaging protrusion 37, the engaging structure and the connecting structure are partially used, and the structure is simple also in this respect. Since these engagement structure and connection structure define the positional relationship of each member, desired mixing can be performed reliably.

  In this way, the fluid can be sufficiently mixed while mainly reducing the pressure loss.

  Therefore, in the fluid mixing method using the static mixing structure 11, the fluid can be well mixed in a state where the pressure loss is small through the flow of the fluid through the neighboring edge portion 18 as described above. Also in the mixed fluid manufacturing method using the static mixing structure 11, the fluid can be mixed well in a state where the pressure loss is small through the flow of the fluid through the neighboring edge portion 18 as described above. For this reason, it can utilize widely for mixing of the fluid in the flow path 12 of various shapes and properties. In particular, since the pressure loss is small, it can be applied to fluid mixing in, for example, a thin tube 21 or a flexible tube 21.

  In order to verify the mixed state of the fluid, a flow analysis was performed and the following results were obtained.

  The flow analysis was performed in a state where 10 sets of mixing element portions 13 having the shapes shown in FIGS. 1 and 6, that is, 20 sheets, were all arranged at equal intervals as shown in FIG. 10. The thickness of the mixing element portion 13 is 1 mm, and the distance a between the mixing element portions 13 is 1 mm. Between the inflow port and the most upstream mixing element portion 13 and between the most downstream mixing element portion 13 and the outflow port, a 4 mm non-mixing flow path portion 12a was set. For this reason, the range which has the mixing element part 13 in a flow path will be about 40 mm. In addition, the inner diameter of the circular channel is 16.1 mm.

Further, assuming that the fluid is water, the fluid density is 1000 kg / m ³ , the fluid viscosity is 1.0 × 10 ⁻³ Pa · S, and the inflow speed is 1.0 m / s. The software used is flow analysis software “RFLOW” of R-Flow, Inc., the basic equation is an uncompressed Navier-Stokes equation, and the turbulent model is a standard k-ε model.

  The supply of fluid was set so that two types of fluid could flow simultaneously in the same area on the inner peripheral side and the outer peripheral side. That is, the fluid on the inner peripheral side has a circular cross-sectional flow, and the fluid on the outer peripheral side has a donut-shaped flow surrounding the inner peripheral fluid.

  FIG. 11 shows the result. The lower side of the vertical rectangle in FIG. 11 is the fluid inlet, and the upper side is the fluid outlet. In addition, all the vertical but rectangular portions are flow paths. The two types of fluid are represented by different colors. The white portion of the middle color at the inlet and the dark portions on both sides represent the fluids to be mixed. The mixing of the two types of fluid can be seen by the middle color between the white and dark areas. For the relationship between color and fluid, refer to the scale on the right side of the drawing.

  When the flow path of FIG. 11 is viewed from the bottom to the top, in the non-mixing flow path portion, the fluid is mixed only at the boundary portion between the two types of fluids, but when passing through 3 sets of 6 mixing element portions, It turns out that it is almost completely mixed.

  As a comparative example, an analysis was performed in a state where no mixing element portion was provided. Other conditions are the same as in the case of FIG. 11 including the length of the flow path. The result is as shown in FIG.

  In other words, the two types of fluid entering from the inlet flow toward the outlet, respectively, but the mixed portion gradually spreads at the boundary between them, but the two types of fluids are mixed as a whole even when reaching the outlet. Absent.

  11 and 12, it can be seen that the mixing element portion 13 greatly contributes to the mixing of the fluid. Moreover, the mixing can be performed in a range shorter than 40 mm, and it can be seen that rapid mixing is performed.

  Other examples will be described below. In this description, parts that are the same as or equivalent to those in the above-described configuration are given the same reference numerals, and detailed descriptions thereof are omitted.

  FIG. 13 shows an example in which an inflow path 25 for allowing the fluid to be mixed to flow is provided upstream of the mixing unit 31 portion in the tube body 21.

  FIG. 14A is a perspective view showing an example in which the spacer 32 is integrally formed with the mixing element portion 13. The shape of the mixing member 13a in which the spacer 32 and the mixing element portion 13 are integrated is the same as the shape in which the spacer 32 is engaged with the mixing element portion 13 except for the cut groove 36 (see FIG. 5). It is. A structure capable of reducing the diameter corresponding to the kerf 36 may be provided. A plurality of the mixing members 13a are connected and used.

  As shown in FIG. 14B, spacers 32 may be formed on both sides of the mixing element portion 13.

  When the mixing member 13a having such a configuration is used, there is an advantage that the number of parts can be reduced in addition to the above-described effects.

  FIG. 15 is a perspective view showing an example in which the static mixing structure 11 is formed inside the tube body 21. That is, the mixing tube body 27 containing the static mixing structure 11. The upstream tube 27 a is connected to the upstream end of the mixing tube 27, and the downstream tube 27 b is connected to the downstream end of the mixing tube 27.

  The mixing tube body 27 is provided with a desired number of mixing element portions 13 at a predetermined interval in an intermediate portion in the longitudinal direction. The interval is appropriately set according to conditions such as fluid properties, flow velocity, and flow rate.

  The shape of the passage portion 14 and the blocking portion 15 of the mixing element portion 13 in the illustrated example is the same as that shown in FIG. 6 and the like, but the number of the mixing element portions 13 is five, and 2.5 sets of mixing elements A group 16 is provided.

  The mixing tube 27 can also be configured by inserting a mixing member 13a as shown in FIGS. 14A and 14B into an existing tube. In addition to connecting the upstream tube 27a and the downstream tube 27b directly, the mixing tube 27 is connected to the outer peripheral end of the upstream tube 27a and the inner peripheral end of the downstream tube 27b. It may be arranged or connected via an appropriate joint member.

  Even when such a mixing tube body 27 is used, the above-described effects can be obtained. Further, if the connection between the upstream side pipe body 27a and the downstream side pipe body 27b is covered with a connection sleeve (not shown), it can be applied to an existing pipe line.

  FIG. 16 shows the mixing element portion 13 and the spacer 32 in the case where a set of mixing element groups 16 is constituted by three mixing element portions 13. That is, as shown in FIGS. 17 (a) and 17 (b), the passing portion 14 of one mixing element portion constituting the mixing element group 16 forms a set of two or more other mixing element portions. 13 is formed so as to be closed in the flow path direction by the combination of the closing portions 15.

  As shown in FIG. 17A, four passage portions 14 of the mixing element portion 13 are formed in a substantially fan shape, and the angle formed by the two sides 17 a extending from the center side of each passage portion 14 to the outer peripheral side is 60. Is set to degrees. For this reason, the angle formed by the two sides 17a extending from the center side to the outer peripheral side in the substantially fan-shaped blocking portion 15 provided between the passage portions 14 is 30 degrees. In addition to 60 degrees or 30 degrees, an angle close to this may be used.

  The engaging recess 34 that engages with the spacer 32 is formed at an intermediate position in the circumferential direction of the closing portion 15.

  When the mixing element portion 13 having such a shape is disposed via the spacer 32, the mixing element portion 13 is in a state as shown in the cross-sectional view of FIG. 17B (the cut portion is BB in FIG. 6A). It becomes. That is, at least one of the two sides 17a extending from the center side to the outer peripheral side of the edge portions 17 of each passing portion 14 and each closing portion 15 and a part of the portion extending in the circumferential direction on the outer peripheral side are adjacent edge portions. 18 In FIG. 17B, since only one set of mixing element group 16 is shown, one of the two sides 17a in the passing portion 14 and the closing portion 15 of the mixing element portion 13 on both sides in the arrangement direction (flow channel direction). Only the neighboring edge 18 is provided, but if the mixing element part 13 is disposed adjacent thereto, the other is also the neighboring edge 18.

  As shown in FIG. 16, the spacer 32 shifts the position of the connecting recess 39 to one side of the intermediate position between the connecting protrusions 38 so that the mixing element portion 13 can be arranged while being shifted by 30 degrees. It is assumed that the position.

  Also in the static mixing structure 11 having the mixing element portion 13 and the spacer 32 configured as described above, the fluid is blocked in the closing portion 15 in the same manner as in the above-described case using the mixing element portion that is a pair of the two. Since the area of the passage part 14 that allows fluid to pass through can be increased while blocking the straight travel, pressure loss can be reduced. In addition, since the peripheral edge 18 is provided in a part of the edge 17, the flow of the fluid is partially promoted to promote mixing.

  In the example of FIGS. 16 and 17, a set of mixing element groups 16 is constituted by three mixing element portions 13, so that the total area ratio of the passing portions 14 of each mixing element portion 13 is one set of two. Since it is larger than the case of the mixing element portion 13 constituting the mixing element group 16 (see FIG. 6), it is possible to perform good mixing while further suppressing the pressure loss, coupled with having the neighboring edge portion 18. Can do.

  FIG. 18 is a perspective view showing an example of the mixing member 13 a provided with the spacer 32 in the central closing portion 33 of the mixing element portion 13. This mixing member 13a is erected on one side of the mixing element portion 13 having the same passage portion 14 and closing portion 15 as the mixing element portion 13 shown in FIG. 6 and the central closing portion 33 of the mixing element portion 13. A spacer 32 is provided.

  The spacer 32 has a quadrangular prism shape, and is provided with a connection recess 39 into which the tip of the spacer 32 is fitted on the surface of the mixing element portion 13 opposite to the spacer 32. The leading end of the spacer 32 is a connecting projection 38. The connecting recess 39 is shifted by 45 degrees from the direction of the spacer 32 in the circumferential direction so that the mixing element section 13 can be connected while shifting by 45 degrees.

  In the mixing member 13a having such a configuration, the connecting protrusion 38 at the tip of the spacer 32 is inserted into the connecting recess 39 of the other mixing member 13a, and the required number of the connecting members are held in the flow path 12 as the mixing unit 31. To use.

  FIG. 19 is a plan view of the mixing element unit 13 according to another example. As shown in this figure, the passing portion 14 and the closing portion 15 of the mixing element portion 13 are basically linearly extending.

  Specifically, the passage part 14 and the blocking part 15 are formed in parallel at equal intervals on the inner side excluding the outer peripheral part of the outer shape corresponding to the flow path 12. The interval is the interval between the widest portions in the width direction of the passage portion 14 and the closing portion 15 because the outer shape is circular.

  The mixing element portion 13 of FIG. 19 is a set of two pieces, and one mixing element portion 13 has three passage portions 14 and two blocking portions 15 located between them. The other mixing element portion 13 has three blocking portions 15 and two blocking portions 14 located between them.

  Two sides 17a extending from the center side to the outer peripheral side on both sides of the passage portion 14 at the intermediate position of one mixing element portion 13, and from the center side to the outer peripheral side on both sides of the closing portion 15 at the intermediate position of the other mixing element portion 13. The extending two sides 17 a are the corresponding neighboring edges 18. In addition, a linear one side 17b extending from the center side to the outer peripheral side at the passage portions 14 at both the left and right positions of the one mixing element portion 13, and a closing portion 15 at both the left and right positions of the other mixing element portion 13 from the center side. A linear one side 17b extending to the outer peripheral side is a corresponding neighboring edge 18.

  Such a mixing element part 13 is used by using the spacer 32 as shown in FIG. Since the passing portion 14 and the closing portion 15 of the mixing element portion 13 are linear, the extending direction of the passing portion 14 and the closing portion 15 can be changed for each set of mixing element groups 16.

  Even when the mixing element portion 13 having such a configuration is provided, the necessary mixing can be performed with a small pressure loss as described above.

In correspondence between the configuration of the present invention and the configuration of the above-described embodiment,
The engagement structure of the present invention corresponds to the engagement recess 34 and the engagement protrusion 37 described above,
Similarly,
The connecting structure corresponds to the connecting recess 38 and the connecting protrusion 39 described above,
The present invention is not limited to the above-described configuration, and other configurations can be employed.

  For example, in the above-described example, the structure in which the end face at the boundary between the passage part and the blocking part is perpendicular to the thickness direction of the mixing element part is shown, but this end face can be inclined. By inclining, it is possible to change the flow of the fluid.

  Further, a static mixing structure may be configured by combining a plurality of types of mixing element parts having different shapes of the passage part and the blocking part.

  Further, in the above-described example, an example in which a set of mixing element groups is formed by two mixing element portions and an example in which a set of mixing element groups is formed by three sheets are shown. You may make it comprise a set of mixing element groups.

DESCRIPTION OF SYMBOLS 11 ... Static mixing structure 12 ... Flow path 13 ... Mixing element part 13a ... Mixing member 14 ... Passing part 15 ... Blocking part 16 ... Mixing element group 17 ... Edge part 17a, 17b ... Side extending from the center side to the outer peripheral side 18 ... Neighboring edge 31 ... Mixing unit 32 ... Spacer 33 ... Central blocking part 34 ... Engagement recess 37 ... Engagement protrusion 38 ... Connection protrusion 39 ... Connection recess

Claims (12)

A static mixing structure comprising a plurality of plate-like mixing element portions extending in the longitudinal direction of the flow path in the flow path through which the fluid passes, and extending in the longitudinal direction of the flow path,
The mixing element portion is formed with a plurality of passage portions that allow the fluid to pass therethrough and a blocking portion that prevents passage of the fluid,
A mixing element group including a plurality of the mixing element portions as a set,
The mixing element portion so that the passage portion of one mixing element portion of the mixing element group is closed in the flow channel direction view by the closing portion of the other mixing element portion of the same mixing element group. And the passage part and the blocking part are disposed,
At least a part of an edge of the passing element or the closing part of one mixing element part of the mixing element group, and the other mixing element part adjacent to the mixing element part in the flow channel direction view Neighboring edges that contact or are close to each other when it is assumed that at least a part of the edge of the blocking part or the passing part overlaps the one mixing element part and the other adjacent mixing element part on the same plane Static mixing structure with parts formed. The edges of the passage part and the blocking part in the mixing element part have a shape having at least two sides extending from the center side to the outer peripheral side,
The static mixing structure according to claim 1, wherein at least one of the two sides is the neighboring edge. The total area ratio of the passing section in the region where the passing section 14 and the blocking section 15 of the mixing element section are formed is equal to or greater than the approximate value of the total area ratio of the blocking section, and
3. The static mixing structure according to claim 1, wherein a total area ratio of the passing portion of the mixing element portion is approximated in all the mixing element portions constituting the mixing element group. The static mixing structure according to any one of claims 1 to 3, further comprising a central blocking portion that prevents passage of the fluid at a central portion of the mixing element portion. The static mixing structure according to any one of claims 1 to 4, wherein a shape of the portion having the passage portion and the blocking portion in the mixing element portion is a rotationally symmetric shape. The shape of all the mixing element parts in the mixing element group is the same,
The static mixing structure according to any one of claims 1 to 5, wherein adjacent mixing element portions are disposed with an angle shifted in a circumferential direction. The passage part of one mixing element part constituting the mixing element group is formed so as to be closed in a flow path direction view by a combination of the blocking parts in two or more other mixing element parts forming one set. The static mixing structure according to any one of claims 1 to 6. The mixing element portion is formed of a member separate from the portion constituting the flow path,
A spacer is provided to maintain a gap between the mixing element portions;
The static mixing structure according to any one of claims 1 to 7, wherein an engagement structure is formed between the mixing element portion and the spacer so as to engage with each other so as not to rotate relative to each other. The mixing element portion is formed of a member separate from the portion constituting the flow path,
A spacer is provided to maintain a gap between the mixing element portions;
9. The connecting structure according to claim 1, wherein the spacer is formed with a connecting structure in which another mixing element portion adjacent to the adjacent spacer in the same direction as the spacer is arranged at an angle shifted in the circumferential direction. Static mixed structure as described in any one of them. The static mixing structure according to claim 8 or 9, wherein the spacer and the mixing element portion are integrally formed. The fluid is mixed by using a static mixing structure in which a plurality of plate-like mixing element portions extending in the direction of closing the flow path are arranged in the flow path through which the fluid passes in the longitudinal direction of the flow path. A fluid mixing method comprising:
In the mixing element portion, a plurality of passage portions that allow the fluid to pass therethrough and a blocking portion that prevents passage of the fluid, and
A mixing element group including a plurality of the mixing element portions as a set,
The mixing element portion so that the passage portion of one mixing element portion of the mixing element group is closed in the flow channel direction view by the closing portion of the other mixing element portion of the same mixing element group. And arranging the passage part and the blocking part of
At least a part of an edge of the passing element or the closing part of one mixing element part of the mixing element group, and the other mixing element part adjacent to the mixing element part in the flow channel direction view Neighboring edges that contact or are close to each other when it is assumed that at least a part of the edge of the blocking part or the passing part overlaps the one mixing element part and the other adjacent mixing element part on the same plane Forming part
The fluid that has passed through the passage portion in the one mixing element portion is prevented from being blocked by the closing portion of the other adjacent mixing element portion to divide the fluid, and the fluid is adjacent to the closing portion. A fluid mixing method in which fluid is mixed by quickly diverting and joining the passing portion through the neighboring edge portion. A mixed fluid is manufactured using a static mixing structure in which a plurality of plate-like mixing element portions extending in the direction of closing the flow path are disposed in the flow path through which the fluid passes in the longitudinal direction of the flow path. A mixed fluid manufacturing method comprising:
In the mixing element portion, a plurality of passage portions that allow the fluid to pass therethrough and a blocking portion that prevents passage of the fluid, and
A mixing element group including a plurality of the mixing element portions as a set,
The mixing element portion so that the passage portion of one mixing element portion of the mixing element group is closed in the flow channel direction view by the closing portion of the other mixing element portion of the same mixing element group. And arranging the passage part and the blocking part of
At least a part of an edge of the passing element or the closing part of one mixing element part of the mixing element group, and the other mixing element part adjacent to the mixing element part in the flow channel direction view Neighboring edges that contact or are close to each other when it is assumed that at least a part of the edge of the blocking part or the passing part overlaps the one mixing element part and the other adjacent mixing element part on the same plane Forming part
The fluid that has passed through the passage portion in the one mixing element portion is prevented from being blocked by the closing portion of the other adjacent mixing element portion to divide the fluid, and the fluid is adjacent to the closing portion. A method for producing a mixed fluid, in which the fluid is mixed by quickly detouring and joining the passing portion through the neighboring edge portion.

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