JP5525937B2 - Crusher - Google Patents

Description

  The present invention relates to a pulverizing apparatus that pulverizes various powders such as pharmaceuticals, agricultural chemicals, metals, and chemical substances into fine powders.

  As a pulverizing apparatus for pulverizing powders of pharmaceuticals, agricultural chemicals and the like, the one described in Patent Document 1 has been conventionally known. In this pulverization apparatus, a pulverization chamber is provided in a casing, a powder injection nozzle and a plurality of air injection nozzles are provided on a peripheral wall of the pulverization chamber, and powder is injected from the powder injection nozzle into the pulverization chamber and swirled. Compressed air is injected from the air injection nozzle toward the swirling powder, and the powder is pulverized by collision with the compressed air and collision of particles, and moves to the center of the crushing chamber while swirling. The powder is discharged from a fine powder discharge tube provided in the upper part of the casing.

  By the way, in the pulverizer, a donut-shaped air header that is separate from the casing is provided below the casing, and the air header and each of the plurality of air injection nozzles provided in the casing are connected by a hose. Since the compressed air is supplied to each air injection nozzle from the above, there is an inconvenience that the pulverizer becomes large. Further, since it is necessary to connect both ends of the plurality of hoses to the air injection nozzle and the air header, there are many connection points, and the connection is very troublesome and easily damaged.

  In order to eliminate such inconvenience, in the pulverization apparatus described in Patent Document 2, an annular shape communicating with each air injection nozzle on the outer periphery of a plurality of air injection nozzles provided at intervals in the circumferential direction is provided. An air chamber is provided, and compressed air supplied into the air chamber is caused to flow into a plurality of air injection nozzles and injected into the grinding chamber.

JP-A-11-179228 JP 2004-141772 A

  By the way, although the crushing apparatus described in Patent Document 2 has a feature of being small and compact, a plurality of air injection nozzles are separate from the casing as in the crushing apparatus described in Patent Document 1. Therefore, the same number of nozzle mounting holes as the air injection nozzles are formed in the casing, and the air injection nozzles are fitted into the respective nozzle mounting holes to prevent the leakage of compressed air from between the fitting surfaces to the outside. There is a disadvantage that it is necessary to take a countermeasure against sealing, and the number of parts increases, so that it takes much time to assemble and process.

  In addition, there is a fine gap communicating with the grinding chamber between the nozzle mounting hole and the air injection nozzle fitting surface, and the powder enters and stays in the gap, thus reducing the powder recovery rate. become. Furthermore, when pulverizing powders such as pharmaceutical products, the air injection nozzle is removed after the pulverization process to clean the pulverization chamber and nozzle mounting holes for the purpose of preventing contamination with other pharmaceutical products, and air injection. Since the nozzle itself needs to be cleaned, there is a disadvantage that the cleaning work is very troublesome.

  An object of the present invention is to provide a compact and easy-to-assemble pulverizing apparatus that has a small number of parts and is easy to assemble.

  In order to solve the above-described problems, in the present invention, a casing having a disk portion, and a cylindrical portion provided on each of the upper surface and the lower surface of the disk portion, and an opening of each cylindrical portion provided in the casing. It comprises an upper cover and a lower cover that close an end to form an air chamber in one cylindrical part, and is provided with a compressed air supply port in the peripheral wall of the air chamber, and a circular grinding chamber is provided in the disk part of the casing And a through hole that penetrates the outer peripheral surface of the disk portion into the grinding chamber, closes the opening on the outer peripheral surface side of the disk portion by the end cap, and injects compressed air flowing into the inner circumferential direction of the grinding chamber A plurality of air injection nozzles, the same number of air introduction holes as the air injection nozzles for guiding the compressed air in the air chamber into each air injection nozzle, and swirling in the grinding chamber A powder injection nozzle for injecting powder in the same direction as the swirling direction of the swirling airflow is provided, and a cover for closing the other cylindrical portion is provided with a fine powder discharge cylinder communicating with the central portion of the grinding chamber The configuration was adopted.

  In the pulverization apparatus having the above-described configuration, when compressed air is supplied into the air chamber, the compressed air flows into the air injection nozzle from the air introduction hole formed in the disk portion, and the air injection nozzle surrounds the inside of the pulverization chamber. A swirling airflow is formed in the grinding chamber.

  Therefore, by injecting the powder from the powder injection nozzle into the pulverization chamber, the powder swirls in the flow of the swirling airflow, and collides with particles and with the compressed air injected from the air injection nozzle. Fine powder as a product which is pulverized and moves to the center of the pulverization chamber is taken out from the fine powder discharge tube.

  In the pulverizing apparatus according to the present invention, an air injection nozzle including a through hole and an air introduction hole that guides compressed air in the air chamber into the air injection nozzle are provided in the disk portion of the casing, so that air as a separate part is provided. Since it is not necessary to install the injection nozzle and at the same time, it is possible to eliminate the need for a sealing measure, the number of parts can be greatly reduced. Moreover, since it is not necessary to form a nozzle mounting hole in the casing, the processing can be facilitated.

  Here, the number of parts can be further reduced by directly providing a powder injection nozzle including a through hole in the disk portion.

  In addition, a fine powder discharge tube is provided in the upper cover that closes the open end of the upper cylindrical portion, the inside of the lower cylindrical portion is an air chamber, and a lower cover that forms the air chamber is composed of a bottomed cylindrical body, By inclining the bottom of the lower cover in one direction and providing a drain hole in the inclined lower portion of the bottom plate on the peripheral wall of the air chamber, the cleaning liquid is poured into the grinding chamber from the upper part of the fine powder discharge cylinder. Flows into the air injection nozzle, flows from the air introduction hole into the air chamber, and is discharged from the drain hole, so that the inside of the pulverizing apparatus can be cleaned effectively.

  In the present invention, as described above, the air injection nozzle formed of the through hole and the air introduction hole that guides the compressed air in the air chamber into the air injection nozzle are provided in the disk portion of the casing as separate parts. This eliminates the need for mounting the air injection nozzle, and at the same time, eliminates the need for sealing measures, so that the number of parts can be greatly reduced, and assembly and disassembly can be facilitated.

  Further, when the air injection nozzle as a separate part is mounted in a nozzle mounting hole formed on the peripheral wall of the grinding chamber as in the conventional case, the grinding chamber is interposed between the nozzle mounting hole and the fitting surface of the air injection nozzle. A gap communicating with is formed. The powder enters and stays in the gap, but in this invention, since the air injection nozzle is made of a through hole, the powder does not stay in the gap and the recovery rate of the pulverized powder is recovered. Can be increased. Furthermore, since it is not necessary to form a nozzle mounting hole in the casing, the processing can be facilitated.

  In addition, the inside of one of the cylindrical portions provided on the upper surface and the lower surface of the disk portion is an air chamber, so that the diameter of the pulverizer can be reduced compared to the case where an air chamber is provided around the air injection nozzle. Therefore, a compact and compact crusher can be obtained.

A longitudinal sectional view showing an embodiment of a crusher according to the present invention Partially cutaway plan view of FIG. Longitudinal sectional view showing another embodiment of the crusher according to the present invention A longitudinal sectional view showing still another embodiment of the pulverizing apparatus according to the present invention

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, the casing 1 has a disk portion 2 and is configured such that cylindrical portions 3 and 4 are provided on the upper surface and the lower surface of the disk portion 2.

  The open ends of the cylindrical portions 3 and 4 are provided with outward flanges 3a and 4a. The outer peripheral portion of the upper cover 5 is supported by the flange 3a of the upper cylindrical portion 3 and is wound around the outer periphery of the upper cover 5 and the flange 3a. By tightening the clamp band 6, the upper cover 5 is detachably attached to the flange 3 a.

  On the other hand, a lower cover 7 is provided below the flange 4 a in the lower cylindrical portion 4. The lower cover 7 is formed of a bottomed cylindrical body provided with an inclined bottom plate 7b in the cylindrical portion 7a, and an outward flange 7c provided at an upper opening end of the cylindrical portion 7a is a flange of the lower cylindrical portion 4. The lower cover 7 is detachably attached to the flange 4a of the lower cylindrical portion 4 by tightening the clamp band 8 which is abutted to the flange 4a and wound around the outer circumferences of both flanges 4a and 7c.

  A sealed space is formed on the bottom plate 7 b by attaching the lower cover 7 to the lower cylindrical portion 4, and the space is an air chamber 9. An air supply port 10 is provided in the cylindrical portion 7 a of the lower cover 7, and compressed air is supplied from the air supply port 10 into the air chamber 9.

  The cylindrical portion 7a is provided with a drain hole 11 at a position facing the inclined lower portion of the bottom plate 7b. The opening of the drain hole 11 is closed by a removable plug body 12.

  The disk portion 2 in the casing 1 includes a circular pulverization chamber 13 having an upper opening, a plurality of air injection nozzles 14 each having a through hole extending from the outer peripheral surface of the disk portion 2 to the pulverization chamber 13, The same number of air introduction holes 15 as the air injection nozzles 14 for guiding the compressed air into the respective air injection nozzles 14 are provided.

  Here, the air injection nozzle 14 is formed by electric discharge machining, and the opening on the outer peripheral surface side of the disk portion 2 is blocked by the attachment of the end cap 16, and sent into the inside through the air introduction hole 15 from the air chamber 9. The compressed air is jetted in the circumferential direction in the crushing chamber 13.

  In addition, a nozzle mounting hole 17 reaching the grinding chamber 13 from the outer peripheral surface is formed in the disk portion 2, and a powder injection nozzle 18 is inserted into the nozzle mounting hole 17. The powder injection nozzle 18 has a large-diameter head portion 18 a facing the outside from the nozzle mounting hole 17, and the head portion 18 a is detachably attached to the joint cylinder 19 connected to the outer periphery of the disk portion 2 and the joint cylinder 19. Is accommodated in a mixing cylinder 20 connected to the. For this reason, by removing the mixing cylinder 20, the powder injection nozzle 18 can be pulled out.

  Here, a space between the fitting surface of the powder injection nozzle 18 and the nozzle mounting hole 17 is sealed by an O-ring 21 fitted to the base portion of the head portion 18 a of the powder injection nozzle 18 and mixed with the joint cylinder 19. The connecting portions of the cylinder 20 are sealed with a packing 22 incorporated between the connecting portions.

  An air nozzle 23 that injects compressed air into the powder injection nozzle 18 is connected to the other end of the mixing cylinder 20, and the mixing chamber 24 is interposed between the tip of the air nozzle 23 and the end face of the head portion 18 a of the powder injection nozzle 18. Is provided. The mixing chamber 24 communicates with a lower end outlet of a hopper 25 for storing powder. When compressed air is injected from the air nozzle 23 into the powder injection nozzle 18, the mixing chamber 24 is set to a negative pressure, and the hopper 25 The powder inside is sucked into the mixing chamber 24 and mixed with the compressed air, and the solid-gas mixed fluid is jetted from the powder jet nozzle 18 in the circumferential direction in the grinding chamber 13.

  The upper cover 5 is provided with a cylindrical lid portion 26 that closes the upper opening of the crushing chamber 13, and a fine powder discharge cylinder 27 that communicates with the inside of the crushing chamber 13 is formed on the lid portion 26. The space between the outer peripheral portion of the lower surface of the lid portion 26 and the facing surface of the disk portion 2 is sealed by an O-ring 28 incorporated between the facing surfaces.

  Note that reference numeral 29 shown in FIG. 2 denotes a hole formed in the disk portion 2 in order to reduce the weight of the casing 1.

  The pulverization apparatus shown in the embodiment has the above-described structure. Now, when compressed air is supplied from the air supply port 10 into the air chamber 9, the compressed air is supplied from the air introduction hole 15 to each of the plurality of air injection nozzles 14. Into each of the air jet nozzles 14 and sprayed into the pulverization chamber 13 from each air injection nozzle 14, and a swirling airflow is formed in the pulverization chamber 13.

  When compressed air is supplied into the air nozzle 23 and powder is injected into the pulverization chamber 13 from the powder injection nozzle 18 in the formation state of the vortex air flow in the pulverization chamber 13, the powder rides on the flow of the vortex air flow. Then, the fine powder as a product which is crushed by the collision of the particles and the collision with the compressed air ejected from the air ejection nozzle 14 and moves to the center of the grinding chamber 13 is taken out from the fine powder discharge cylinder 27.

  Here, when the object to be crushed is a medicine or an agrochemical, the inside of the pulverizing apparatus needs to be washed after the pulverization treatment for one lot of the medicine for the purpose of preventing mixing with other medicines. In the cleaning, the powder injection nozzle 18 is removed, the opening end of the nozzle mounting hole 17 is plugged, the opening end is closed, and the cleaning liquid is supplied to the fine powder discharge tube 27.

  By supplying the cleaning liquid into the fine powder discharge cylinder 27, the cleaning liquid flows into the crushing chamber 13 and enters the nozzle mounting hole 17. Further, the cleaning liquid that has entered the pulverization chamber 13 flows into each of the plurality of air injection nozzles 14 and flows into the air chamber 9 from the air introduction hole 15, and the pulverization chamber 13, the nozzle mounting hole 17, Each of the air injection nozzle 14 and the air introduction hole 15 can be effectively cleaned.

  Here, the cleaning liquid stored in the air chamber 9 is discharged from the drain hole 11 by removing the plug 12 that closes the opening of the drain hole 11.

  In the pulverizing apparatus shown in FIGS. 1 and 2, an air injection nozzle 14 formed of a through hole and an air introduction hole 15 that guides compressed air in the air chamber 9 into the air injection nozzle 14 are formed in the disk portion 2 of the casing 1. Since it is provided, it is not necessary to install an air injection nozzle as a separate component, and at the same time, it is possible to eliminate the need for sealing measures, so the number of components can be greatly reduced. For this reason, it is possible to facilitate assembly and disassembly work, and it is not necessary to form a nozzle mounting hole in the casing 1, so that processing can be facilitated.

  Further, the inside of the lower cylindrical portion 4 provided on the lower surface of the disk portion 2 is the air chamber 9, so that the diameter of the pulverizing apparatus is reduced as compared with the case where the air chamber is provided around the air injection nozzle. Therefore, a compact and compact crusher can be obtained.

  FIG. 3 shows another example of the grinding device. This example is different from the pulverizing apparatus shown in FIG. 1 in that a powder supply nozzle 30 having a through hole extending from the outer peripheral surface thereof into the pulverizing chamber 13 is formed in the disk portion 2. For this reason, the same components as those shown in FIG.

  As shown in FIG. 3, the powder injection nozzle 30 and the O-ring 21 shown in FIG. It can be further reduced, and assembly and disassembly can be simplified. Moreover, since the powder supply nozzle 18 can also be cleaned with the cleaning liquid supplied into the crushing chamber 13, the cleaning operation can be facilitated.

  In FIG. 1, the fine powder pulverized in the pulverization chamber 13 is taken out upward, but the lower cover 7 shown in FIG. 1 is removed and the upper cover 5 is attached to the upper cylindrical portion 3 of the casing 1. As shown in FIG. 4, the upper and lower sides are inverted, and a disc-shaped cover 31 is detachably attached to the opening end of the cylindrical portion 4 that is directed upward, and the inside of the cylindrical portion 4 serves as an air chamber 32. The cylindrical portion 4 or the cover 31 may be provided with an air supply port 33 so that the fine powder pulverized in the pulverization chamber 13 may be taken out downward.

  When the hole 29 is formed in the disk portion 2 and the space 40 formed between the upper cover 5 and the disk portion 2 communicates with the air chambers 9 and 32, the air supply ports 10 and 33 are connected to the air supply ports 10 and 33, respectively. You may make it open to the space 40. FIG.

  Further, the introduction holes 15 for communicating the air chambers 9 and 32 and the air injection nozzle 14 may be provided above and below the disk portion 2.

DESCRIPTION OF SYMBOLS 1 Casing 2 Disk part 3 Cylindrical part 4 Cylindrical part 5 Upper cover 7 Lower cover 9 Air chamber 10 Air supply port 11 Drain hole 12 Plug body 13 Crushing chamber 14 Air injection nozzle 15 Air introduction hole 16 End cap 18 Powder injection nozzle 27 Fine powder discharge cylinder 30 Powder supply nozzle 32 Air chamber

Claims (3)

  A casing having a disk portion, and a cylindrical portion provided on each of the upper surface and the lower surface of the disk portion, and an open end of each cylindrical portion provided on the casing is closed, and an air chamber is provided in one cylindrical portion. The upper cover and the lower cover are formed, and a compressed air supply port is provided in the peripheral wall of the air chamber. A circular pulverization chamber is formed in the disk portion of the casing, and the pulverization chamber is penetrated from the outer peripheral surface of the disk portion. A plurality of air injection nozzles each having a through hole that closes the opening on the outer peripheral surface side of the disk portion by the end cap and injects compressed air flowing into the circumferential direction in the circumferential direction of the grinding chamber; The same number of air introduction holes as the air injection nozzles for guiding the compressed air into the respective air injection nozzles, and the powder for injecting the powder in the same direction as the swirling direction of the swirling airflow swirling in the grinding chamber The injection nozzle is provided, the cover for closing the other of the cylindrical portion, the milling apparatus in which a fine powder discharge tube communicating with the central portion of the grinding chamber.   The fine powder discharge cylinder is provided on the upper cover, the inside of the lower cylindrical portion is an air chamber, the lower cover forming the air chamber is a cylindrical body having a bottom, and the bottom of the lower cover is inclined in one direction. The crusher according to claim 1, wherein a drain hole is formed in the inclined lower part, and a plug is detachably attached to the opening of the drain hole.   The pulverizing apparatus according to claim 1, wherein the powder injection nozzle is a through-hole penetrating from the outer peripheral surface of the disk portion into the pulverization chamber.

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