Stirring device

Abstract

In a thin film rotating type stirring device, a side surface of a cylindrical part is configured from a first region which is divided into a belt shape along the circumferential direction of the cylindrical part and in which a plurality of holes penetrating in the inside-outside direction are formed, and a second region which is divided into a belt shape along the circumferential direction of the cylindrical part and in which a plurality of holes penetrating in the inside-outside direction are formed. And a plurality of holes penetrating in the inside-outside direction are formed so as to have an aperture ratio smaller than that of the first region or so as to be non-porous. The first region is disposed in a portion including the center of the cylindrical portion in the height direction, and the second region is disposed at a position from the upper end of the first region to the upper end of the cylindrical portion and from the lower end of the first region to the lower end of the cylindrical portion. When the width of the first region is Wp and the total height of the rotating member is H, the relationship 0 < Wp < 0.5 H is satisfied.

Description

Technical Field

[0001] The present invention relates to a stirring device for performing emulsification and dispersion treatment, for example, a device used for producing a slurry containing a conductive material. Background Art

[0002] It is predicted that the demand for batteries represented by lithium-ion secondary batteries and fuel cells will increase in the future, in addition to power sources for portable electronic devices, power sources for electric vehicles, and storage of electricity generated by wind and solar power generation equipment. In addition, not only is the battery itself required to be miniaturized, lightweight, and safer, but it is also required to produce batteries with these properties efficiently and at low cost.

[0003] As an effective means to solve this problem, a high-speed mixer disclosed in patent document 1 is proposed. The high-speed mixer is a high-speed mixer in which a rotating shaft is concentrically arranged in a cylindrical stirring tank, and a rotating blade with a slightly smaller diameter than the stirring tank is installed on the rotating shaft. The high-speed mixer is a mixer that stirs the treated liquid while expanding it into a thin film cylindrical shape on the inner surface of the stirring tank by the high-speed rotation of the rotating blade. The rotating blade includes a porous cylindrical portion on the outer peripheral side that is provided with many small holes in the radial direction through the cylindrical body. According to the high-speed mixer, there is a simple structure that can play an excellent stirring effect by piercing many small holes in the cylindrical body. In addition, because there is no surface for the treated liquid to collide, even if the liquid containing solid components is treated, there is less wear, and there is an advantage that there is less worry that the metal components of the rotating blades will mix into the treated liquid.

[0004] In addition, the stirring device system disclosed in Patent Document 2 uses the high-speed stirrer of Patent Document 1. When using this stirring device system to manufacture battery electrode coating, it has the advantages of being able to highly maintain battery safety and efficiently manufacture electrode coating suitable for high performance of batteries.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 11-347388

[0008] Patent Document 2: International Publication No. 2010 / 018771 Summary of the invention

[0009] Problems to be solved by the invention

[0010] In recent years, attempts have been made to use linear carbons such as carbon nanotubes (CNTs) as additives to batteries, resins, etc. In general, linear carbons such as CNTs have superior properties such as a larger specific surface area than conventional carbon materials, and therefore, it can be expected that when a portion of the conductive material of a lithium-ion secondary battery is replaced with CNTs, etc., its performance will be improved. However, linear carbons such as CNTs have strong cohesive forces due to reasons such as a large specific surface area, and are difficult to make into a uniformly mixed and dispersed slurry. In order to solve this problem, the inventors of the present invention have conducted intensive research and found that the above-mentioned issues can be solved by re-examining the configuration of the many small holes that are radially penetrated in the porous cylindrical portion (cylindrical portion) of the rotating blade (rotating component).

[0011] Technical solutions to solve problems

[0012] Specifically, the stirring device of the present invention includes a container and a rotating member that rotates at a high speed slightly inside the inner wall surface of the container, and the stirring object that exists in a film form between the rotating member and the inner wall surface is stirred by the centrifugal force generated by the rotating member. The stirring device is characterized in that the rotating member has a cylindrical portion that exists with a slight gap relative to the inner wall surface of the container, and the side surface of the cylindrical portion is composed of a first area and a second area, wherein the first area is divided into a strip shape along the circumferential direction of the cylindrical portion and a plurality of holes that penetrate in the inner and outer directions are formed, the second area is divided into a strip shape along the circumferential direction of the cylindrical portion, and the plurality of holes that penetrate in the inner and outer directions are formed in a manner with a smaller opening ratio than the first area, the first area is arranged in a portion including the center of the height direction of the cylindrical portion, and the second area is arranged from the upper end of the first area to the upper end of the cylindrical portion and from the lower end of the first area to the lower end of the cylindrical portion, and when the width of the first area is set to Wp and the total height of the rotating member is set to H, the relationship of 0<Wp<0.5H is satisfied.

[0013] Preferably, the stirring device satisfies the following relationship when the opening ratio of the plurality of holes penetrating in the first region in the inner and outer directions is set to P1 and the opening ratio of the plurality of holes penetrating in the second region in the inner and outer directions is set to P2:

[0014] 0≤P2 / P1<0.5 and P1>0.

[0015] In addition, in the stirring device, the multiple holes penetrating along the inside-outside direction of the first region preferably have an opening area in the inside direction that is larger than the opening area in the outside direction, the multiple holes penetrating along the inside-outside direction of the first region preferably have a larger number of openings in the inside direction than the number of openings in the outside direction, and the multiple holes penetrating along the inside-outside direction of the first region preferably have a penetration path that branches within the cylindrical portion.

[0016] Preferably, the rotating member further includes a horizontal portion orthogonal to the rotating axis of the rotating member inside the cylindrical portion, and the inner space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion.

[0017] The multiple holes penetrating along the inside-outside direction of the first region preferably have their penetration paths branched within the cylindrical portion, and the inward openings of each hole are respectively arranged in the upper space and the lower space, and the multiple holes penetrating along the inside-outside direction of the first region preferably have their inward openings arranged in the upper space and their inward openings arranged in the lower space arranged in an alternating manner relative to the circumferential direction of the cylindrical portion.

[0018] Effects of the Invention

[0019] Generally, in a stirring device (thin-film swirling-type stirring device) comprising a container and a rotating member rotating at a high speed slightly inside the inner wall of the container, the stirring object existing in a film-like state between the rotating member and the inner wall is stirred by the centrifugal force generated by the rotating member, and the stirring object supplied to the container from the supply port arranged at the bottom of the container is driven by the inner circumference and outer circumference of the cylindrical portion of the rotating member rotating at a high speed and swirls at a high speed in the container. At this time, the stirring object existing on the inner side of the cylindrical portion of the rotating member is supplied to the space between the container and the rotating member (clearance) from a plurality of holes formed in the cylindrical portion of the rotating member and passing through in the inner and outer directions by the action of the centrifugal force added by the rotation of the rotating member. Then, the stirring object supplied to the clearance is in close contact with the inner surface of the container and swirls in a film-like state. As a result, the stirring object supplied to the space between the container and the rotating member and in a film-like state generates a swirl speed difference between the surface side of the rotating member and the inner surface side of the container, and is stirred by the shear force generated thereby.

[0020] Here, as described above, the side surface of the cylindrical portion of the rotating member is composed of a first area and a second area, wherein the first area is divided into a band shape along the circumferential direction of the cylindrical portion and is provided with a plurality of holes penetrating in the inner and outer directions, the second area is divided into a band shape along the circumferential direction of the cylindrical portion, and the plurality of holes penetrating in the inner and outer directions are formed in a manner with a smaller opening ratio than that of the first area, the first area is arranged in a portion including the center in the height direction of the cylindrical portion, and the second area is arranged from the upper end of the first area to the upper end of the cylindrical portion and from the lower end of the first area to the lower end of the cylindrical portion, and when the width of the first area is set to Wp and the total height of the rotating member is set to H, if the relationship of 0<Wp<0.5H is satisfied, the stirring object supplied from the inner side of the cylindrical portion of the rotating member to the gap portion by the centrifugal force added by the rotating member is concentratedly supplied from the holes formed in the first area arranged in the portion including the center in the height direction of the cylindrical portion among the plurality of holes penetrating in the inner and outer directions of the side surface of the cylindrical portion of the rotating member. Thus, in the gap portion, the pressure ratio of the stirring object in the portion relative to the first region of the cylindrical portion of the rotating part is higher than the pressure of the stirring object in the portion relative to the second region, therefore, a flow is generated that moves from the center of the height direction of the cylindrical portion to the upper end and lower end direction of the cylindrical portion while the stirring object swirls. Thus, the circulation of the stirring object carried out between the inner side of the cylindrical portion of the rotating part and the gap portion is promoted, and the processing efficiency of the stirring object is improved. In addition, in the gap portion, due to the speed difference of the swirl between the outer side of the rotating part and the inner surface side of the container, a large friction is generated between the stirring object and the inner surface of the container and the rotating part, generating high-temperature heat, but when the circulation of the stirring object carried out between the inner side of the cylindrical portion of the rotating part and the gap portion is promoted as described above, the residence time of the stirring object in the gap portion is reduced, and the temperature rise of the stirring object is suppressed.

[0021] In addition, usually, in a thin film swirling type stirring device, the opening ratio of the multiple holes formed in the cylindrical part of the rotating part and penetrating in the inner and outer directions will affect the shear force added to the stirring object and the supply speed of the stirring object from the inner side of the cylindrical part of the rotating part to the gap part. Specifically, when the opening ratio of the multiple holes formed in the cylindrical part and penetrating in the inner and outer directions decreases, the shear force added to the stirring object also increases corresponding to the increase in the contact area between the cylindrical part and the stirring object. On the other hand, when the opening ratio of the multiple holes formed in the cylindrical part and penetrating in the inner and outer directions decreases, the supply speed of the stirring object from the inner side of the cylindrical part of the rotating part toward the gap part decreases. On the other hand, when the opening ratio of the multiple holes formed in the cylindrical part and penetrating in the inner and outer directions decreases, the supply speed of the stirring object from the inner side of the cylindrical part of the rotating part toward the gap part decreases. On the other hand, when the opening ratio of the holes increases, the supply speed of the stirring object increases. As described above, the shear force added to the stirring object and the supply speed of the stirring object from the inner side of the cylindrical part of the rotating part to the gap part have a relationship of one increasing while the other decreasing.

[0022] Here, as described above, when the opening ratio of the plurality of holes in the first region is set to P1 and the opening ratio of the plurality of holes in the second region is set to P2, and the second region with a smaller opening ratio of the plurality of holes is arranged in a manner that satisfies the relationship of "0≤P2 / P1<0.5 and P1>0", a larger shear force can be applied to the stirring object existing in the gap portion opposite to the second region, and sufficient stirring treatment can be performed. On the other hand, in the second region, the opening ratio of the plurality of holes is small, and the supply speed of the stirring object from the inner side of the cylindrical portion of the rotating component to the gap portion becomes smaller, but this can be compensated by the following method: As described above, in the gap portion, the pressure of the stirring object existing in the portion opposite to the first region of the cylindrical portion of the rotating component is higher than the pressure of the stirring object existing in the portion opposite to the second region, thereby generating a flow that moves from the center of the height direction of the cylindrical portion toward the upper end and the lower end of the cylindrical portion while the stirring object rotates. That is, this point can be compensated by supplying the stirring object to the gap portion through the holes formed in the first area arranged in the center of the height direction of the cylindrical portion including the rotating part, and then supplying the stirring object to the gap portion opposite to the second area through the flow of the stirring object moving toward the upper and lower ends of the cylindrical portion.

[0023] In addition, in the stirring device of the present invention, the opening area of ​​each of the multiple holes that penetrate along the inner and outer directions of the first area of ​​the cylindrical part of the rotating part is larger in the inner direction than in the outer direction, so that the supply of the stirring object from the inner side of the cylindrical part of the rotating part to the gap part can be promoted, and the pressure of the stirring object in the gap part that is opposite to the first area of ​​the cylindrical part of the rotating part can be further increased, thereby promoting the flow that moves from the center of the height direction of the cylindrical part to the upper end and lower end of the cylindrical part while the stirring object rotates. As a result, the circulation of the stirring object between the inner side of the cylindrical part of the rotating part and the gap part can be further promoted, and the above-mentioned effects of improving the processing efficiency of the stirring object, suppressing the temperature rise of the stirring object, and adding a large shear force to the stirring object to perform sufficient stirring treatment can be further improved.

[0024] For the multiple holes that penetrate in the inward and outward directions of the first area of ​​the cylindrical portion of the rotating component, as a method of making the opening area of ​​each hole in the inward direction larger than the opening area in the outward direction, it is preferred to make the number of openings in the inward direction of each hole larger than the number of openings in the outward direction. More specifically, it is preferred to make the through path of each hole branch within the cylindrical portion of the rotating component.

[0025] In addition, in the stirring device of the present invention, it is preferred that the rotating member has a horizontal portion orthogonal to the rotation axis of the rotating member on the inner side of the cylindrical portion, and the inner space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion. When the inner space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion like this, the circulation of the stirring object between the inner side of the rotating member and the gap portion can be performed more reliably, and the above-mentioned effect of improving the processing efficiency of the stirring object, the effect of suppressing the temperature rise of the stirring object, and the effect of adding a large shear force to the stirring object to perform sufficient stirring treatment can be more reliably embodied.

[0026] At this time, when the multiple holes that penetrate in the first region in the inner and outer directions adopt the following structure (1) or (2), the stirring objects respectively existing in the upper space and the lower space are mixed with each other when they are centrally supplied from the holes formed in the first region to the gap. Thus, it is possible to avoid the circulation of the stirring object between the inner side of the cylindrical portion of the rotating member and the gap in a form that is separated between the upper space side and the lower space side, and the circulation of the stirring object between the inner side of the cylindrical portion of the rotating member and the gap can be performed in a form in which the stirring object circulating between the upper space side and the lower space is appropriately exchanged. Thus, the above-mentioned effects of improving the processing efficiency of the stirring object, suppressing the temperature rise of the stirring object, and adding a large shear force to the stirring object to enable sufficient stirring treatment can be more reliably reflected.

[0027] (1) The through-paths of each hole are branched in the cylindrical portion, and the inward openings of each hole are respectively arranged in the upper space and the lower space;

[0028] (2) The holes whose inward openings are arranged in the upper space and the holes whose inward openings are arranged in the lower space are arranged alternately with respect to the circumferential direction of the cylindrical portion.

[0029] Other features and advantages of the present invention will become more apparent from the following detailed description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram showing the stirring device according to the present invention.

[0031] Figure 2 It is a cross-sectional view showing the stirring device according to the present invention.

[0032] Figure 3 It is a diagram showing a rotating member according to the first embodiment of the present invention.

[0033] Figure 4 It is a schematic diagram showing the flow state of the stirring object when the rotating member according to the first embodiment of the present invention is used.

[0034] Figure 5 It is a diagram showing a rotating member according to a second embodiment of the present invention.

[0035] Figure 6 It is a cross-sectional view showing a rotating member according to a second embodiment of the present invention.

[0036] Figure 7 It is a diagram showing a rotating member according to a third embodiment of the present invention.

[0037] Figure 8 It is a cross-sectional view showing a rotating member according to a third embodiment of the present invention.

[0038] Fig. 9 It is a diagram showing a rotating member according to a fourth embodiment of the present invention.

[0039] Fig.10 It is a cross-sectional view showing a rotating member according to a fourth embodiment of the present invention.

[0040] Fig.11 It is a diagram showing a rotating member according to a comparative example.

[0041] Fig.12 It is a schematic diagram showing the flow state of the stirring object when the rotating member according to the comparative example is used. DETAILED DESCRIPTION

[0042] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 and Figure 2 As shown, the stirring device 1 includes: a cylindrical container 2; an outer layer 4, which is connected to a water-cooling pipe 6 for supplying and discharging cooling water on the outer peripheral surface including the bottom surface of the container 2; a rotating component 800 (810, 820, 830), which has a slight gap s with the inner surface 22 of the container 2 and can rotate concentrically with the container 2 at high speed; an axis 10, which supports the rotating component 800 at the end and can be driven to rotate forward and reverse at high speed; an upper container 14, which is arranged on the upper part of the container 2 through a baffle 12 and has a discharge pipe 13 for discharging the product; and a cover 16, which seals the upper container 14, and supply pipes 17 and 18 for supplying raw materials to the bottom of the container 2 are provided via valves 19 and 20. In addition, in Figure 1 or Figure 2 In the figure, for the sake of convenience, the multiple holes, covers, valves, etc. of the cylindrical portion (described later) of the rotating member 800 that penetrate in the inner and outer directions are omitted. Figure 2 As shown, the inner diameter of the container 2 is set to D, and the outer diameter of the cylindrical portion is set to When relationship.

[0043] like Figure 2As shown, the upper container 14 includes a cooling water chamber 15 supplied with cooling water on its peripheral surface. The baffle plate 12 has an opening 11 so that the treated liquid (agitation object) can be discharged from the outflow pipe 13.

[0044] Furthermore, the rotating member 800 is driven at a high speed of 10 to 50 m / sec. Further, in the stirring device 1, the container 2, the upper container 14, the cover 16 and the shaft 10 can be hermetically sealed with a gasket so that a vacuum exhaust device can be provided via a valve body for vacuum exhaust.

[0045] Next, the operation of the high-speed stirring device according to this embodiment will be described. Figure 2 First, because there are set conditions for the treated liquid, a baffle 12 is set to seal the container 2. Then, a predetermined amount of the treated liquid L is introduced into the container 2 from the supply pipes 17 and 18. Then, the shaft 10 connected to the motor (not shown) is driven to rotate at high speed, and the rotating member 800 rotates at high speed.

[0046] At this time, the treated liquid L is forced and rotated in the circumferential direction by the high-speed rotation of the rotating member 800. Due to the centrifugal force generated by the rotation, the treated liquid L becomes a thin film cylindrical shape with a thickness t on the inner surface of the container 2 and swirls. Then, the stirred treated liquid L passes over the baffle plate 12 and continuously flows into the upper container 14, and is discharged from the outflow pipe 13 to the outside of the container 2.

[0047] Next, the details of the rotating member used in the stirring device of the present invention and the stirring device of the comparative example will be described.

[0048] (Example 1)

[0049] Figure 3 The rotating member 800 of Embodiment 1 is shown. Figure 3 (a) is a cross-sectional view of the rotating member 800, showing Figure 3 (b) Cross section at AA. Figure 3 (b) is a top view of the rotating member 800 . Figure 3 (c) is a side view of the rotating component 800. Figure 3 As shown, the rotating member 800 has a cylindrical portion 801. Figure 3 As shown by the dotted line in (c), a first region 803 is provided on the side of the cylindrical portion 801. The first region 803 is divided into a band along the circumference of the cylindrical portion and has a plurality of holes 802 that penetrate in the inner and outer directions of the cylindrical portion 801. In addition, the first region 803 is provided in a manner that includes the center of the height direction of the cylindrical portion 801. The upper end of the first region 803 is formed by the tangent line ( Figure 3The lower end of the first region 803 is defined by the lower tangent line of the opening edge of the plurality of holes 802 arranged on the side of the cylindrical portion 801 ( Figure 3 (c) is specified by the dot-dash line on the lower side. The width Wp of the first region 803 is specified by the interval between the tangent line on the upper side and the tangent line on the lower side of the opening edge of the above-mentioned multiple holes 802. In the first region 803, the interval between adjacent multiple holes 802 is the same as the interval between the rows in which the multiple holes 802 are arranged. In addition, in this embodiment, an example in which multiple holes 802 are arranged in one row in the first region 803 is shown, but more than two rows are also allowed as needed. At this time, the upper end of the first region 803 is specified by the tangent line on the upper side of the opening edge of the uppermost row of the multiple holes 802, and the lower end of the first region 803 is specified by the tangent line on the lower side of the opening edge of the lowermost row of the multiple holes 802.

[0050] like Figure 3 As shown in (c), on the side of the cylindrical portion 801, the second region 804 is arranged from the upper end of the first region 803 (the tangent line on the upper side) to the upper end of the side of the cylindrical portion 801 and from the lower end of the first region 803 (the tangent line on the lower side) to the lower end of the side of the cylindrical portion 801. In the second region 804, a plurality of holes 802 are formed in such a manner that the opening ratio of the plurality of holes 802 penetrating in the inner and outer directions is smaller than the opening ratio of the first region 803. Figure 3 In the example shown, there is no opening (aperture ratio = 0), but the present invention is not limited thereto. In addition, the aperture ratio P is defined as follows. In this embodiment, the aperture ratios P ​​of the second regions 804 on the upper and lower sides are set to be the same, but they may be different as needed.

[0051] P=S1 / S2

[0052] S1: The sum of the opening areas of the plurality of holes in the target region (first region or second region)

[0053] S2: The sum of the areas of the target regions (first region or second region)

[0054] The width Wn of the second region 804 is determined by the sum of the width Wn1 from the upper end of the first region 803 (the tangent line on the upper side of the opening edge of the plurality of holes 802) to the upper end of the side surface of the cylindrical portion 801 and the width Wn2 from the lower end of the first region 803 (the tangent line on the lower side of the opening edge of the plurality of holes 802) to the lower end of the side surface of the cylindrical portion 801 (Wn=Wn1+Wn2). In addition, the total height H of the rotating component is determined by the height of the side surface of the cylindrical portion 801, and the following relationship is satisfied:

[0055] H=Wp+Wn.

[0056] Here, the width Wp of the first region satisfies the relationship of 0<Wp<0.5H. In the present embodiment, the widths Wn1 and Wn2 of the second region 804 on the upper and lower sides are set to be the same, but they may be different as necessary.

[0057] When the above structure of the rotating member 800 is adopted, the stirring object supplied from the inner side of the cylindrical portion 801 of the rotating member 800 to the gap portion (refer to paragraph 0012) is supplied intensively from the holes 802 formed in the first region 803 disposed in the center of the height direction of the cylindrical portion 801 among the plurality of holes 802 of the cylindrical portion 801 of the rotating member 800. As a result, in the gap portion, the pressure of the stirring object existing in the portion opposite to the first region 803 of the cylindrical portion 801 is higher than the pressure of the stirring object existing in the portion opposite to the second region 804, and thus, while the stirring object is rotating, as shown in FIG. Figure 4 As shown, the flow moves from the center of the height direction of the cylindrical portion 801 toward the upper end and the lower end of the cylindrical portion 801. Figure 4 The circulation of the stirring object between the inner side of the rotating member 800 and the gap portion is promoted, and the processing efficiency of the stirring object is improved.

[0058] Generally, in the gap, there is a difference in the swirling speed of the stirring object between the rotating member 800 side and the inner surface side of the container 2, thereby generating a large friction between the stirring object and the rotating member 800 and the inner surface of the container 2, thereby generating high-temperature heat. Therefore, when the circulation of the stirring object between the inner side of the cylindrical portion 801 of the rotating member 800 and the gap is promoted as described above, the retention time of the stirring object in the gap is reduced, and as Figure 4 As shown, a flow in which the stirring object Fh having a relatively high temperature and the stirring object Fl having a relatively low temperature are switched is generated, and therefore, a temperature rise of the stirring object is suppressed.

[0059] When the width Wp of the first region satisfies the following relationship, the effect of improving the processing efficiency of the stirring object and the effect of suppressing the temperature rise of the stirring object are further improved.

[0060] Preferably, 0<Wp<0.3H,

[0061] More preferably, 0<Wp<0.2H,

[0062] More preferably, 0<Wp<0.1H.

[0063] On the other hand, when the width Wp of the first region is too small, the supply of the stirring object from the hole 802 formed in the first region 803 to the gap portion is hindered. Therefore, it is desirable that the width Wp of the first region satisfies the following relationship:

[0064] Preferably Wp>0.01H,

[0065] More preferably, Wp>0.02H,

[0066] More preferably, Wp>0.03H.

[0067] In addition, generally, in the thin film swirling type stirring device, the opening ratio P of the plurality of holes 802 formed in the cylindrical portion 801 affects the shear force added to the stirring object and the supply speed of the stirring object from the inner side of the rotating part to the gap portion. Specifically, when the opening ratio P of the plurality of holes 802 formed in the cylindrical portion 801 becomes smaller, the shear force added to the stirring object also increases corresponding to the increase in the contact area between the cylindrical portion 802 and the stirring object. On the other hand, when the opening ratio P of the plurality of holes 802 formed in the cylindrical portion 801 becomes smaller, the supply speed of the stirring object from the inner side of the cylindrical portion 801 of the rotating part 800 to the gap portion becomes smaller. On the other hand, when the opening ratio P of the plurality of holes 802 formed in the cylindrical portion 801 becomes smaller, the supply speed of the stirring object from the inner side of the cylindrical portion 801 of the rotating part 800 to the gap portion becomes smaller. On the other hand, when the opening ratio P of the holes becomes larger, the supply speed of the stirring object increases. As described above, the shear force added to the stirring object and the supply speed of the stirring object from the inner side of the cylindrical portion 801 of the rotating member 800 to the gap portion are in a trade-off relationship. Therefore, in this embodiment, when the opening ratio of the plurality of holes 802 in the first region 803 is set to P1 and the opening ratio of the plurality of holes 802 in the second region 804 is set to P2, it is set to satisfy the relationship of "0≤P2 / P1<0.5 and P1>0". When the second region 804 with a smaller opening ratio of the plurality of holes 802 is configured in this way, a larger shear force can be added to the stirring object existing in the gap portion opposite to the second region 804, and sufficient stirring treatment can be performed.

[0068] On the other hand, in the second region 804, the opening ratio of the plurality of holes 802 is small, and the supply speed of the stirring object from the inner side of the cylindrical portion 801 of the rotating member 800 to the gap portion is small, but this can be compensated by the following method: as described above, in the gap portion, the pressure of the stirring object existing in the portion opposite to the first region 803 of the cylindrical portion 801 of the rotating member 800 is higher than the pressure of the stirring object existing in the portion opposite to the second region 804, so that while the stirring object rotates, Figure 4As shown, the flow moves from the center of the height direction of the cylindrical part 801 toward the upper end and the lower end of the cylindrical part 801. That is, this point can be compensated by supplying the stirring object to the gap portion from the hole 802 formed in the first area 803 of the part arranged in the center of the height direction of the cylindrical part 801 including the rotating member 800, and the flow moves toward the upper end and the lower end of the cylindrical part 801, respectively, to the gap portion opposite to the second area 804.

[0069] In addition, in this embodiment, the opening area of ​​each of the plurality of holes 802 penetrating in the inner and outer directions of the first region 803 of the cylindrical portion 801 of the rotating member 800 is larger in the inner direction than in the outer direction (see Figure 3 (a)), therefore, it is possible to promote the supply of the stirring object from the inner side of the cylindrical portion 801 of the rotating component 800 to the gap portion, and further increase the pressure of the stirring object in the gap portion that is opposite to the first region 803 of the cylindrical portion 801 of the rotating component 800. As a result, the flow that moves from the center in the height direction of the cylindrical portion 801 toward the upper end and lower end of the cylindrical portion while the stirring object rotates is promoted. As a result, the circulation of the stirring object between the inner side of the cylindrical portion 801 of the rotating component 800 and the gap portion is further promoted, and the above-mentioned effects of improving the processing efficiency of the stirring object, suppressing the temperature rise of the stirring object, and adding a large shear force to the stirring object to enable sufficient stirring treatment can be further improved. In addition, in order to further improve the above-mentioned effect of the present invention, it is desirable to set the opening ratio of the plurality of holes 802 in the first region 803 and the second region 804 to satisfy the following relationship:

[0070] Preferably 0≤P2 / P1<0.25 and P1>0,

[0071] More preferably, 0≤P2 / P1<0.1 and P1>0,

[0072] More preferably, 0≤P2 / P1<0.05 and P1>0.

[0073] As a method of making the opening area of ​​each hole in the inner direction larger than the opening area in the outer direction, the plurality of holes 802 penetrating in the inner and outer directions of the first region 803 of the rotating member 800 are provided in this embodiment by making the number of openings in the inner direction of each hole larger than the number of openings in the outer direction. Specifically, the through path 805 of each hole branches inside the cylindrical portion 801, the number of openings in the inner direction is 2, and the number of openings in the outer direction is 1.

[0074] In addition, in the present embodiment, the rotating member 800 has a horizontal portion 806 orthogonal to the rotation axis of the rotating member 800 on the inner side of the cylindrical portion 801, and the inner space of the cylindrical portion 801 is divided into an upper space 807 and a lower space 808 by the horizontal portion 806. As described above, when the inner space of the cylindrical portion 801 is divided into an upper space and a lower space by the horizontal portion 806, the circulation of the stirring object between the inner side of the cylindrical portion 801 of the rotating member 800 and the gap portion can be more reliably performed, and the above-mentioned effects of improving the processing efficiency of the stirring object, suppressing the temperature rise of the stirring object, and adding a large shear force to the stirring object to enable sufficient stirring treatment can be more reliably reflected. In addition, the division of the upper space 807 and the lower space 808 by the horizontal portion 806 is preferably that the upper space 807 and the lower space 808 are isolated, and the circulation of the stirring object through the horizontal portion 806 is cut off. In addition, in the example shown in the figure, the horizontal portion 806 includes a boss 28 that abuts against the shaft 10 .

[0075] In addition, in the present embodiment, the openings in the inner direction of the plurality of holes 802 that penetrate in the inner and outer directions of the first region 803 are respectively arranged in the upper space 807 and the lower space 808, and the opening through-path 805 that connects the two inner openings and one outer opening is combined inside the cylindrical portion 801. Therefore, the stirring objects respectively existing in the upper space and the lower space can be mixed with each other when they are supplied from the holes formed in the first region to the gap portion. Thus, it is possible to avoid the circulation of the stirring object between the inner side of the cylindrical portion 801 of the rotating member 800 and the gap portion in the form of being separated on the upper space 807 side and the lower space 808 side, and the circulation of the stirring object between the inner side of the rotating member and the gap portion can be performed in a manner in which the stirring objects circulating on the upper space side 807 and the lower space 808 are appropriately exchanged. As a result, the above-mentioned effects of improving the processing efficiency of the stirring object, suppressing the temperature rise of the stirring object, and applying a large shear force to the stirring object to enable sufficient stirring processing can be more reliably achieved.

[0076] (Example 2)

[0077] Figure 5 The rotating member 810 of Embodiment 2 is shown. Figure 5 (a) is a cross-sectional view of the rotating member 810, showing Figure 5 (b) Cross section at AA. Figure 5 (b) is a top view of the rotating member 810 . Figure 5 (c) is a side view of the rotating member 810. In addition, Figure 6 is a cross-sectional view of the rotating member 810, showing Figure 5 (b) Cross section at BB.

[0078] The rotating component 810 is the same as the rotating component 800 of Example 1, except that the structure and arrangement of the multiple holes 802 that penetrate in the inner and outer directions of the first region 803 are different from those of the rotating component 800 of Example 1. Specifically, the inner openings of the multiple holes 802 of the rotating component 810 are respectively arranged in the upper space 807 and the lower space 808, but the through path 805 is not connected inside the cylindrical portion 801, and the inner openings and the outer openings are connected one to one. In addition, the inner openings of the multiple holes 802 are arranged to open obliquely on the inclined portion 811 of the cylindrical portion 801, so that the inner opening area of ​​each hole 802 is larger than the outer opening area. Further, as Figure 5 As shown in (c), the plurality of holes 802 penetrating in the inner and outer directions are arranged in a manner that the holes with inner openings arranged in the upper space 807 and the holes with inner openings arranged in the lower space 808 are arranged alternately relative to the circumferential direction of the cylindrical portion 801. Through the above structure, the above-mentioned effects of improving the processing efficiency of the stirring object, suppressing the temperature rise of the stirring object, and adding a large shear force to the stirring object to enable sufficient stirring processing can be embodied.

[0079] (Example 3)

[0080] Figure 7 The rotating member 820 of Embodiment 3 is shown. Figure 7 (a) is a cross-sectional view of the rotating member 820, showing Figure 7 (b) Cross section at AA. Figure 7 (b) is a top view of the rotating member 820. Figure 7 (c) is a side view of the rotating member 820. In addition, Figure 8 is a cross-sectional view of the rotating member 820, showing Figure 7 (b) Cross section at BB.

[0081] The rotating member 820 is the same as the rotating member 810 of Example 2 except that the structure and arrangement of the plurality of holes 802 penetrating in the inner and outer directions of the first region 803 are different from those of the rotating member 810 of Example 2. Specifically, a through path 805 connecting the inner openings and the outer openings of the plurality of holes 802 is obliquely penetrated in the cylindrical portion 801, as shown in FIG. Figure 7 As shown in (c), the plurality of holes 802 penetrating in the inner and outer directions are arranged in a manner that the holes with the inner openings arranged in the upper space 807 and the holes with the inner openings arranged in the lower space 808 are alternately arranged on the same line relative to the circumferential direction of the cylindrical portion 801. Through the above structure, the above-mentioned effects of improving the processing efficiency of the stirring object, suppressing the temperature rise of the stirring object, and adding a large shear force to the stirring object to enable sufficient stirring processing can be embodied.

[0082] (Example 4)

[0083] Fig. 9 The rotating member 830 of Embodiment 4 is shown. Fig. 9 (a) is a cross-sectional view of the rotating member 830, showing Fig. 9 (b) Cross section at AA. Fig. 9 (b) is a top view of the rotating member 830. Fig. 9 (c) is a side view of the rotating member 830. Example 4 relates to a stirring device, which includes a container and a rotating member that rotates at a high speed slightly inside the inner wall surface of the container, and stirs the stirring object that exists in a film between the rotating member and the inner wall surface by the centrifugal force generated by the rotating member. The stirring device is characterized in that: the rotating member has a cylindrical portion that exists with a slight gap relative to the inner wall surface of the container, and has a horizontal portion on the inner side of the cylindrical portion that is orthogonal to the rotation axis of the rotating member, the inner space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion, and the side surface of the cylindrical portion opposite to the upper space and the side surface opposite to the lower space are respectively composed of a first area and a second area, and the first area is along the cylindrical portion. The circumference of the cylindrical portion is divided into bands and a plurality of holes penetrating in the inner and outer directions are formed. The second region is divided into bands along the circumference of the cylindrical portion, and the plurality of holes penetrating in the inner and outer directions are formed in a manner with a smaller opening ratio than the first region or are set to be hole-free. The first region is respectively arranged on the side of the upper space of the cylindrical portion and the horizontal side of the side of the lower space, and the second region is respectively arranged on the side of the upper space of the cylindrical portion from the upper end of the first region to the upper end of the cylindrical portion and on the side of the lower space of the cylindrical portion from the lower end of the first region to the lower end of the cylindrical portion. The plurality of holes formed in the first region are arranged in rows less than 3 rows in the circumference of the cylindrical portion.

[0084] Fig.10 is a cross-sectional view of the rotating member 830, showing Fig. 9 (b) The cross section at BB. Fig. 9 As shown, the rotating member 830 has a cylindrical portion 801, and a horizontal portion 806 orthogonal to the rotation axis of the rotating member 830 is provided inside the cylindrical portion 801. The inner space of the cylindrical portion 801 is divided into an upper space 807 and a lower space 808 by the horizontal portion 806. Fig. 9 As shown by the dot-dash line in (c), a first region 803 is provided on the side of the cylindrical portion 801 of the rotating member 830, which is divided into a band shape along the circumferential direction of the cylindrical portion and has a plurality of holes 802 penetrating along the inner and outer directions of the cylindrical portion 801. The first region 803 is respectively arranged on the horizontal side of the side of the upper space 807 and the side of the lower space 808 of the cylindrical portion 801 (the center side in the height direction of the cylindrical portion 801).

[0085] The upper end of the first region 803 in the side surface of the upper space 807 of the cylindrical portion 801 is defined by the tangent line ( Fig. 9 On the other hand, the lower end of the first region 803 is determined by a height position ( Fig. 9 The width Wp1 of the first region 803 in the side surface of the upper space 807 of the cylindrical portion 801 is defined by the interval between the tangent line on the upper side of the opening edge of the plurality of holes 802 and the height position based on the surface on the upper space 807 side of the horizontal portion 806. In the first region 803, the intervals between the adjacent plurality of holes 802 are the same as the intervals between the rows in which the plurality of holes 802 are arranged.

[0086] The lower end of the first region 803 in the side surface of the lower space 808 of the cylindrical portion 801 is defined by the tangent line ( Fig. 9 On the other hand, the upper end of the first region 803 is determined by the height position ( Fig. 9 (c) is specified by the dot-dash line on the upper side of the first area 803 in the side surface of the lower space 808 of the cylindrical portion 801. The width Wp2 of the first area 803 in the side surface of the lower space 808 of the cylindrical portion 801 is specified by the tangent line on the upper side of the opening edge of the above-mentioned multiple holes 802 and the interval of the height position based on the surface on the side of the lower space 807 of the horizontal portion 806. In the first area 803, the intervals between adjacent multiple holes 802 are the same as the intervals between the rows in which the multiple holes 802 are arranged. In addition, in the present embodiment, the widths Wp1 and Wp2 of the first area 803 on the side surface of the upper space 807 and the side surface of the lower space 808 of the cylindrical portion 801 are set to be the same, but it is also allowed to be different as needed. In addition, in the present embodiment, an example in which multiple holes 802 are arranged in one row in the first area 803 is shown, but it is also allowed to be set to more than two rows as needed. At this time, the upper end of the first area 803 is defined by the upper tangent line of the opening edge of the uppermost row of multiple holes 802, and on the other hand, the lower end of the first area 803 is defined by the lower tangent line of the opening edge of the lowermost row of multiple holes 802.

[0087] like Fig. 9As shown in (c), on the side of the cylindrical portion 801, the second region 804 is respectively arranged from the upper end of the first region 803 to the upper end of the side of the cylindrical portion 801 in the side of the upper space 807 and from the lower end of the first region 803 to the lower end of the side of the cylindrical portion 801 in the side of the lower space 808. In the second region 804, a plurality of holes 802 are formed in such a manner that the opening ratio of the plurality of holes 802 penetrating in the inner and outer directions is smaller than the opening ratio of the first hole forming region 803. Figure 3 In the example shown, it is set to have no opening (opening ratio = 0), but it is not limited to this. In addition, the opening ratio P is defined as follows:

[0088] P = S1 / S2,

[0089] S1: the sum of the opening areas of the plurality of holes in the target region (first region or second region),

[0090] S2: The sum of the areas of the target regions (first region or second region).

[0091] In the present embodiment, the opening ratios P ​​of the first region 803 and the second region 804 of the side surface of the upper space 807 and the side surface of the lower space 808 of the tubular portion 801 are set to be the same, but may be different as necessary.

[0092] The width of the second region 804 is determined by the width Wn1 from the upper end of the first region 803 in the side of the upper space 807 (the tangent line on the upper side of the opening edge of the uppermost row of the plurality of holes 802) to the upper end of the side of the cylindrical portion 801, or the width Wn2 from the lower end of the first region 803 in the side of the lower space 808 (the tangent line on the lower side of the opening edge of the lowermost row of the plurality of holes 802) to the lower end of the side of the cylindrical portion 801. In addition, in the present embodiment, the widths Wn1 and Wn2 of the second region 804 on the side of the upper space 807 and the side of the lower space 808 of the cylindrical portion 801 are set to be the same, but they may be different as needed. In addition, in the present embodiment, an example is given in which the plurality of holes 802 are arranged in one row in each first region 803, but it may be set to more than two rows as needed, and may be arranged in rows less than three rows. The plurality of holes formed in the first region 803 are preferably arranged in two or less rows, more preferably in one row, in the circumferential direction of the cylindrical portion 801 .

[0093] (Comparative Example)

[0094] Fig.11 A rotating member 8 of a comparative example is shown. Fig.11 (a) is a cross-sectional view of the rotating member 8, showing Fig.11 (b) Cross section at AA. Fig.11 (b) is a top view of the rotating member 8 . Fig.11 (c) is a side view of the rotating member 8. The side surface of the cylindrical portion 24 of the rotating member 8 is divided into a first area and a second hole forming area, and a plurality of holes 30 penetrating in the inner and outer directions are formed almost entirely on the side surface of the cylindrical portion 24, except for the portion including the center in the height direction of the cylindrical portion 24. In addition, the rotating member 8 is formed with a through hole 32 in the horizontal portion 26, and the upper space 81 and the lower space 82 are connected. In addition, it should be noted that this comparative example is not a prior art with respect to the present invention.

[0095] According to the rotating member 8, the stirring object supplied from the inner side of the cylindrical portion 24 of the rotating member 8 to the gap portion is supplied relatively uniformly from the plurality of holes 30 penetrating in the inner and outer directions over almost the entire side surface of the cylindrical portion 24. Therefore, in this comparative example, unlike the embodiment, the flow moving from the center in the height direction of the cylindrical portion toward the upper end and the lower end of the cylindrical portion while the stirring object is rotating is not promoted. Fig.12 As shown, turbulence will be generated in the gap. Therefore, in this comparative example, the effect of improving the processing efficiency of the stirring object, the effect of suppressing the temperature rise of the stirring object, and the effect of adding a large shear force to the stirring object to enable sufficient stirring treatment cannot be fully reflected.

[0096] The stirring device according to the present invention is not limited to the above-mentioned embodiment. The specific structural design of each part of the stirring device according to the present invention can be freely changed in various ways.

[0097] Explanation of symbols

[0098] 1. Stirring device

[0099] 2 Container

[0100] 4 Outer layer

[0101] 6 water cooling piping

[0102] 8, 800, 810, 820 rotating parts

[0103] 10 Axis

[0104] 12 Blocking plate

[0105] 13 Discharge pipe

[0106] 14 upper container

[0107] 16 Cover

[0108] 17, 18 Supply pipe

[0109] 19, 20 valves

[0110] 22 Inner surface of container

[0111] 24.801 Cylindrical part

[0112] 26, 806 horizontal part

[0113] 28 Boss

[0114] 30 Small holes

[0115] 32 Through holes

[0116] 81, 807 Upper Space

[0117] 82, 808 Lower Space

[0118] 803 First Area

[0119] 804 Second Area

[0120] 805 Through Path

[0121] 811 Inclined portion.

Claims

1. A stirring device, characterized in that: The invention comprises a container and a rotating member rotating at a high speed slightly inside the inner wall surface of the container, wherein the stirring object existing in a film form between the rotating member and the inner wall surface is stirred by the centrifugal force generated by the rotating member. The rotating member has a cylindrical portion that is spaced slightly apart from the inner wall surface of the container. The side surface of the cylindrical portion is composed of a first area and a second area, wherein the first area is divided into a band along the circumferential direction of the cylindrical portion and is formed with a plurality of holes penetrating in the inner and outer directions, and the second area is divided into a band along the circumferential direction of the cylindrical portion and is formed in a manner that the plurality of holes penetrating in the inner and outer directions have a smaller opening ratio than the first area or is set to have no holes, The first region is arranged in a portion including the center in the height direction of the cylindrical portion. The second region is arranged at a position from the upper end of the first region to the upper end of the cylindrical portion and from the lower end of the first region to the lower end of the cylindrical portion. When the width from the upper end to the lower end of the first region is defined as Wp and the total height of the tubular portion is defined as H, a relationship of 0<Wp<0.5H is satisfied.

2. The stirring device according to claim 1, characterized in that When the aperture ratio of the first region is set to P1 and the aperture ratio of the second region is set to P2, the following relationship is satisfied: 0≤P2 / P1<0.5 and P1>0.

3. The stirring device according to claim 1, characterized in that The opening area of ​​each of the plurality of holes in the first region along the inner and outer directions is larger in the inner direction than in the outer direction.

4. The stirring device according to claim 1, characterized in that In each of the plurality of holes penetrating the first region in the inner and outer directions, the number of openings in the inner direction is greater than the number of openings in the outer direction.

5. The stirring device according to claim 4, characterized in that A through-path of each of the plurality of holes penetrating in the inner-outer direction of the first region branches within the cylindrical portion.

6. The stirring device according to claim 1, characterized in that: The rotating member has a horizontal portion orthogonal to a rotating axis of the rotating member inside the cylindrical portion, and the inner space of the cylindrical portion is divided into an upper space and a lower space by the horizontal portion.

7. The stirring device according to claim 6, characterized in that The through-paths of each of the plurality of holes penetrating in the inner and outer directions of the first region are branched in the cylindrical portion. The inward openings of the holes are respectively arranged in the upper space and the lower space.

8. The stirring device according to claim 6, characterized in that The plurality of holes penetrating in the first region in the inner and outer directions are arranged in a manner that holes opening inwardly in the upper space and holes opening inwardly in the lower space are alternately arranged relative to the circumferential direction of the cylindrical portion.

Images