JP4537881B2 - Immersion medium dispersion device - Google Patents

Description

  The present invention relates to an immersion type medium dispersion in which a dispersion chamber filled with a dispersion medium (beads) is immersed in a treatment material (mill base), and the treatment material is circulated in the dispersion chamber for dispersion treatment in the dispersion chamber. It relates to the device.

  Various immersion-type medium dispersion apparatuses are known in which a dispersion chamber containing a dispersion medium is immersed in a tank and dispersed in a batch manner (see, for example, Patent Document 1). This immersion-type medium dispersing apparatus is provided with a flow blade for flowing a processing material on a drive shaft so that the processing material flows into the dispersion chamber, or a rotary disk pump type disk having a pump action is provided in the dispersion chamber. The treatment material is sucked into the dispersion chamber and the treatment material dispersed in the dispersion chamber flows out of the dispersion chamber through a screen provided on the side wall of the dispersion chamber. This screen has small holes and slits that open to the extent that the dispersion medium does not flow out of the dispersion chamber. However, when a dispersion medium with a small particle size is used for fine dispersion processing, the small diameter and the like are correspondingly fine. Therefore, it was easy to cause a failure such as clogging immediately.

  In a wet type media dispersion device that supplies processing material into the processing tank and discharges the processing material from the processing tank after dispersion processing, the processing material is processed by centrifugal force action using the mass difference (specific gravity difference) between the processing material and the dispersion medium. A medium separation mechanism for separating a material and a dispersion medium is known (see, for example, Patent Document 2). According to this method, it is possible to separate even a fine dispersion medium having a small particle diameter, but it has been difficult to directly apply to the immersion medium dispersion apparatus as described above.

  That is, the conventional medium separation mechanism using centrifugal force is provided with a medium separation rotor that is rotated by a drive shaft in the treatment tank, and the treatment material is supplied into the treatment tank by a pump or the like provided separately from the drive shaft. Therefore, the supply of processing material and the rotation of the media separation rotor can be controlled separately, and the rotation of the media separation rotor can be freely adjusted to produce the desired centrifugal force necessary to separate the dispersion medium. be able to.

On the other hand, in the case of the immersion type medium dispersing device, the processing material is caused to flow (suction) into the dispersion chamber by means of a blade rotated by a drive shaft or a rotary disk pump type disk. When a centrifugal force is generated in the mixture of the treatment material and the dispersion medium by the medium separation rotor provided in the chamber, the treatment material is less likely to flow (suction) into the dispersion chamber due to the flow generated by the centrifugal force, and the centrifugal separation is performed. The greater the force action, the less the processing material will flow (suction) into the dispersion chamber.
JP 2004-121950 A (Claim 1, FIG. 2) Japanese Utility Model Publication No. 4-61635 (claim for utility model registration, Fig. 1)

  The problem to be solved by the present invention is that it is a centrifugal force action so that clogging and the like are less likely to occur even in the case of using a dispersion medium having a fine particle size in an immersion type medium dispersion apparatus that performs dispersion treatment by immersing the dispersion chamber in a treatment material. It is another object of the present invention to provide a submerged medium dispersion apparatus that can employ the medium separation mechanism according to the above, and that allows the treatment material to be reliably sucked into the dispersion chamber for dispersion treatment.

  As described above, the structure of the immersion type medium dispersion device in which the medium separation rotor is simply provided will be described in detail with reference to FIG. 1. The dispersion chamber immersed in the processing material (2) in the tank (1). (3) has a suction port (4) into which a dispersion medium (not shown) is housed and a processing material flows, but is almost entirely closed. In the dispersion chamber (3), there is a rotary disk pump type suction rotor (5) for sucking the treatment material into the dispersion chamber for dispersion treatment, and the suction rotor (6) is driven by the drive shaft (6). 5) Rotate. In such a submerged medium dispersion apparatus, in order to separate the dispersion medium and the treatment material by the difference in specific gravity between the dispersion medium and the treatment material using centrifugal force action, a discharge path (7) formed on the drive shaft (6) is used. The medium separation rotor (9) may be provided so as to surround the inner opening (8). In this case, the dispersion medium does not enter the inner opening (8) due to the centrifugal force action of the medium separating rotor (9), and only the processing material passes through the inner opening (8) to the discharge path ( 7) should enter and be discharged into the tank from the outer opening (10) formed at its tip.

  However, in practice, in the structure as shown in FIG. 1, the processing material tends to flow out of the dispersion chamber due to the flow of centrifugal force generated in the closed dispersion chamber, and the processing material enters the dispersion chamber from the suction port. When the peripheral speed of the medium separation rotor is increased so as to make it difficult to enter and generate a large centrifugal force, a phenomenon has also been observed in which the processing material flows backward from the suction port (4).

  On the other hand, as shown in FIG. 2, a discharge auxiliary rotor (11) having the same shape as the medium separating rotor (9) is provided around the outer opening (10) of the discharge passage (7) to provide a drive shaft (6 ) Can be balanced with the centrifugal force action by the medium separation rotor, and the discharge amount q by each rotor (9), (11) becomes the same, as a result, provided on the drive shaft (6). The discharge through the discharge path (7) does not occur.

  When the suction rotor (5) is provided in the dispersion chamber as shown in FIG. 3 with the medium separation rotor (9) and the discharge auxiliary rotor (11) being balanced, the suction rotor (5 ), The suction amount is sucked into the dispersion chamber from the suction port and the discharge amount discharged into the tank from the outer opening (10) becomes the same flow rate, and the processing material should flow into and out of the dispersion chamber at the flow rate Q. .

Further, the motion speed V1 (cm / sec) given to the mixture of the processing material and the dispersion medium by the medium separation rotor (9) is as follows when Stokes' formula is applied to the fluid in the centrifugal field.

Here, the centrifugal effect Z in the above equation is as follows.

On the other hand, as shown in FIG. 4, the speed V2 (cm / sec) of the processing material (slurry) flowing into the discharge path toward the center of the medium separation rotor is a discharge amount Q (cm ³ / sec), Assuming the opening area S (cm ² ) of the medium separating rotor, V2 = Q / S.

  Therefore, in the medium separation rotor, if the speed V2 of the processing material moving toward the center is smaller than the motion speed V1 in the fluid in the centrifugal field, that is, if V1> V2, the dispersion medium (bead) having a large specific gravity. Moves at the speed V1 toward the outer periphery of the medium separation rotor, and the processing material having a small specific gravity moves toward the center at the speed V2, so that even a dispersion medium having a fine particle diameter can be reliably separated.

  Based on the above considerations, according to the present invention, a dispersion chamber containing a dispersion medium and having a suction port at the bottom, a suction rotor provided in the dispersion chamber, and one end connected to the suction rotor and the other end Is connected to a drive shaft extending outward of the dispersion chamber, an inner opening provided on the drive shaft and opening in the dispersion chamber, and the other end connected to an outer opening opening outside the dispersion chamber. A submerged medium comprising a discharge path, a medium separation rotor including a centrifugal disc provided so as to surround the inner opening, and a discharge auxiliary rotor including a discharge auxiliary disk provided so as to surround the outer opening. A distribution device is provided to solve the above problems.

  The present invention is configured as described above, and a discharge path having an inner opening and an outer opening is formed in a drive shaft that drives the suction rotor, and a medium separation rotor is provided around the inner opening, and the outer opening is provided around the outer opening. Since the discharge auxiliary rotor is provided, by balancing the discharge amounts of the medium separation rotor and the discharge auxiliary rotor, the processing material can be sucked into the dispersion chamber and distributed by the rotary disk pump type suction rotor. The dispersion medium is separated by the separation rotor, and only the treated material after the dispersion treatment can be discharged into the tank through the discharge path.

  FIG. 5 shows an embodiment of the immersion type medium dispersing apparatus of the present invention. The dispersion chamber (3) has an upper plate portion (13) and a lower plate portion (14) above and below the trunk portion (12). A support rod (15) attached to the upper plate portion (13) is connected to a support head (not shown) and immersed in a tank (not shown). The lower plate portion (14) is formed with a suction port (4), and the suction port (4) is provided with a substantially frustoconical suction cylinder (16).

  The drive shaft (6) is inserted into the upper plate (13) of the dispersion chamber (3) through a bead stop bush (18) that prevents the dispersion medium (beads) (17) filled in the dispersion chamber from flowing out. A thick drive disk (19) is provided at the lower end of the drive shaft (6). A suction disk (21) having a through hole (20) in the center is formed below the drive disk (19) so as to form a rotary disk pump type suction rotor (5) together with the drive disk (19). 21) is arranged in an opposing state and is fixed to the drive disk (19) by a distance collar (22) and a screw (23).

  A discharge path (7) is formed at the center of the drive shaft (6), and one end of the discharge path (7) communicates with an inner opening (8) that opens into the dispersion chamber (3). The end communicates with an outer opening (10) that opens to the outside of the dispersion chamber. The number, size, shape and the like of the inner opening (8) and the outer opening (10) can be appropriately set as desired.

  Around the inner opening (8), a medium separating rotor (9) including a centrifugal disc (24) is provided so as to surround the inner opening (8). In the embodiment shown in the figure, the centrifugal disk (24) is provided above the drive disk (19) in an opposed state, and is fixed by a distance collar or distance fin (25) and a screw (26). A medium separating rotor may be provided independently from the drive disk (19) (not shown).

  The distance fin (25) can be formed in various ways. For example, as shown in FIG. 6, the fin (25) is inclined and provided in a substantially radial direction so that an appropriate angle of attack is generated with respect to the center line (27) of the centrifugal disc (24). It is provided in the radial direction along the center line so as to be 0 degrees (FIG. 7), or as shown in FIG. 8, a fin (29) is provided on the side of the distance collar (28) so that the distance collar (28) is appropriately disposed. You may enable it to vary the angle of attack of the fin by rotating and fixing.

  In addition, a space having an appropriate width is formed between the centrifugal disc (24) and the upper plate portion (13) so that the processing material does not stay and does not bite the dispersion medium. Preferably, the inner surface (30) of the upper plate portion (13) is inclined such that the central portion side of the space is narrow and the peripheral portion side is wider, but the surface of the centrifugal disc (24) is inclined. Thus, a space as described above may be formed.

  A discharge auxiliary rotor (11) including a discharge auxiliary disk (31) is provided around the outer opening (10) so as to surround the outer opening (10). The discharge auxiliary disk (31) of the discharge auxiliary rotor (11) is fixed by a distance collar (32) or a distance fin and a screw (33), but is the same as the fin of the medium separating rotor (9). Various fins and the like can be provided.

  Thus, by appropriately adjusting the opening area, diameter, peripheral speed, and the like of the medium separating rotor (9) and the discharge auxiliary rotor (11), the processing material having a small specific gravity is more specific than the speed V2 toward the center. If the large dispersion medium is set so that the velocity V1 toward the outer periphery increases, the processing material is sucked into the dispersion chamber (3) from the suction port (4), and after the dispersion treatment, the discharge of the drive shaft (6) is performed. It is discharged into the tank through the passage (7), and the dispersion medium (17) can be separated by the medium separation rotor (9) so as not to flow out of the dispersion chamber.

Explanatory drawing which shows an example of the wet medium dispersion | distribution apparatus which has a medium separation rotor. Explanatory drawing which shows the relationship between a medium separation rotor, a discharge auxiliary | assistant rotor, and a dispersion | distribution chamber. Explanatory drawing which shows the basic composition of this invention. Explanatory drawing which shows the flow of the fluid in a medium separation rotor. Sectional drawing which shows one Example of this invention. An explanatory view showing a medium separation rotor. Explanatory drawing which shows another medium separation rotor. Furthermore, the explanatory view which shows the other medium separation rotor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tank 2 Processing material 3 Dispersion chamber 4 Suction port 5 Suction rotor 6 Drive shaft 7 Discharge path 8 Inner opening 9 Medium separation rotor 10 Outward opening 11 Discharge auxiliary rotor 19 Drive disk 21 Suction disk 24 Centrifugal disk 31 Discharge auxiliary disk

Claims (6)

  A dispersion chamber containing the dispersion medium and having a suction port at the bottom; a suction rotor provided in the dispersion chamber; a drive shaft having one end connected to the suction rotor and the other end extending outward of the dispersion chamber; A discharge path provided on the drive shaft and having one end communicating with an inner opening that opens into the dispersion chamber and the other end communicating with an outer opening that opens to the outside of the dispersion chamber; and a discharge path that surrounds the inner opening. An immersion-type medium dispersing device comprising: a medium separation rotor including a centrifugal separation disk; and a discharge auxiliary rotor including a discharge auxiliary disk provided so as to surround the outer opening.   2. The immersion type medium dispersing device according to claim 1, wherein the drive shaft has a drive disk at a lower end, and the medium separation rotor is formed by providing a centrifugal disk in an opposed state above the drive disk.   3. The immersion type medium dispersing apparatus according to claim 1, wherein the drive shaft has a drive disk at a lower end, and the suction rotor is formed by providing a suction disk opposite to the drive disk.   The immersion medium dispersing apparatus according to claim 1, wherein the medium separating rotor has fins extending in a radial direction or a substantially radial direction.   5. The immersion type medium dispersing device according to claim 1, wherein the discharge assisting rotor has fins extending in a radial direction or a substantially radial direction. The immersion type according to claim 1, wherein the dispersion chamber has an inner surface adjacent to the medium separation rotor, and the inner surface is inclined so that a distance from the medium separation rotor is narrower at a central portion side and wider at a peripheral portion side. Media distribution device.

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