JP5905495B2 - Crushing classifier - Google Patents

Description

  The present invention relates to a pulverizing and classifying machine for pulverizing an object to be pulverized, such as cereals such as soybean and rice, shells and ores, to a desired particle size. More specifically, the present invention relates to a pulverization classifier having an emergency stop function.

  Various pulverization techniques have been conventionally developed for pulverizing cereals, ores, etc. In particular, for example, those described in Patent Document 1 can be used to obtain fine powder. .

  The pulverizing and classifying machine described in Patent Document 1 has the first and second rotating bodies supported by the rotating shaft opposed to each other and accommodated in a casing provided with a raw material inlet on one side. A crushing chamber is configured between the pair of rotating bodies and the casing chamber.

  A raw material passage interval such as a through hole communicating with the crushing chamber and the input port is provided in the first rotating body, and a through hole is provided at an appropriate position of the second rotating body along the rotating support shaft. It is set as the structure connected to the discharge port provided with the hole and the absorber.

  When this pulverizer is rotated through a rotating shaft, the raw material supplied to the pulverization chamber rotates through the raw material passage interval, and centrifugal force acts on the raw material. The centrifugal force causes the raw material to move in the radial direction. In this state, when the suction action by the suction device installed on the discharge port side is added to the raw material, the fine powder that is strongly subjected to the suction action by the centrifugal force is taken out from the discharge port. It has become so.

JP-A-4-40246

  However, in the pulverizing / classifying machine as described above, when the pulverizing / classifying machine is overloaded or trouble occurs in other devices in the pulverizing / classifying line and the pulverizing / classifying line is stopped urgently, each device is There is a time lag until a complete stop is reached.

  Normally, a product recovery device is installed at the outlet of the pulverizing and classifying machine as described above to collect the pulverized and classified products. When the pulverizing and classifying line stops urgently, there is a time lag until each device reaches a complete stop. As a result, unground materials and powders in the middle of pulverization are often mixed into the pulverized and classified products collected in the product recovery apparatus.

In this way, if unpulverized raw materials or powders in the middle of pulverization are mixed into the pulverized and classified products collected in the product recovery device, all of the pulverized and classified products collected in the product recovery device become defective products. As a result, the production efficiency was reduced.
In addition, foreign matter (oil, grease, etc.) enters the pulverization chamber from the outside and contaminates the pulverized product.

The present invention has been made to solve such a problem, and even when the pulverization / classification line is urgently stopped, the pulverized / classified product collected in the product recovery device is not subjected to raw material or powder during pulverization. It is an object of the present invention to provide a pulverizing and classifying machine having an emergency stop function for preventing the mixing of slag.
Furthermore, this invention makes it a subject to provide the grinding | pulverization classification machine provided with the function which prevents mixing of the foreign material in a grinding | pulverization chamber.

In order to achieve the above object, in the invention according to the first aspect,
(1) a crushing chamber casing in which a cylindrical crushing chamber is formed;
A side casing that is disposed on the upstream side of the crushing chamber casing and in which a raw material charging port is formed on the upstream side;
A classification chamber casing that is arranged on the downstream side of the pulverization chamber casing and that defines a frustoconical classification chamber in which a pulverized material take-out port communicating with the suction duct is formed on the downstream side;
A crushing chamber comprising:
(2) A rotary shaft holding case that protrudes outward from the upstream end face of the side casing is rotatably attached, and is driven to rotate around the central axis of the grinding chamber by a drive source provided outside the grinding chamber. A rotor rotation axis;
(3) At least one stirring and grinding rotor fixed to the rotor rotating shaft, wherein a plurality of stirring and grinding blades for stirring and grinding the object to be ground introduced from the raw material charging port of the side casing are radially provided. A provided stirring and grinding rotor;
(4) A stirring and classifying rotor fixed to the tip end side of the rotor rotating shaft, facing the frustoconical inner peripheral surface of the classifying chamber and facing the inner peripheral surface, and inclined along the inner peripheral surface A stirring classifying rotor provided with a plurality of stirring classifying blades having a tip shape radially;
(5) a first shut-off device provided at the pulverized material outlet of the classification chamber casing;
The first shut-off device is a pulverizing / classifying machine configured to be closed when the pulverizing / classifying line is urgently stopped .

In the invention according to the second aspect,
The pulverization classifier according to the first aspect of the present invention further includes a second shut-off device provided at the raw material inlet of the side casing , and the second shut-off device is closed when the pulverization / classification line is stopped in an emergency. A pulverizing and classifying machine configured to be in a state was used.

In the invention according to the third aspect,
In the pulverization classifier of the invention according to the second aspect , a suction port is provided in the wall surface of the side casing, and the suction port is further provided with a third shut-off device. In this case, the pulverizing and classifying machine is configured to be set to the open state after the first shut-off device and the second shut-off device are in the closed state.

Furthermore, in the invention according to the fourth aspect,
In the pulverizing / classifying device according to the third aspect of the present invention, the pulverizing / classifying device further includes an unfinished product recovery device connected to a suction port provided on the wall surface of the side casing.

In the invention according to the fifth aspect,
In the pulverization classifier according to the first to fourth aspects of the present invention, a foreign substance is provided between the rotary shaft holding case and the side casing, and foreign matter enters the pulverization chamber through the gap between the rotor rotary shaft and the side casing. A pulverizing and classifying machine having a configuration that further includes a foreign matter mixing prevention unit for preventing the contamination.

In the invention according to the sixth aspect,
In the pulverizing / classifying machine according to the first to fifth aspects of the present invention, in order to scrape off the crushed material adhering to the inner wall surface of the pulverizing chamber, at least one provided inside the pulverizing chamber and rotating along the inner wall surface of the pulverizing chamber. A pulverizing / classifying machine having the above-described slewing scraper was provided.

By adopting the configuration of the invention as described above, even if the pulverization / classification line is in an emergency stop, the pulverized / classified product collected in the product recovery device can be mixed with unpulverized raw materials and pulverized powder. In order to prevent this, it has become possible to provide a pulverization classifier having an emergency stop function.
In addition, it has become possible to eliminate the problem that foreign matter (oil, grease, etc.) enters the pulverization chamber from the outside and contaminates the pulverized product.
As a result, it has become possible to prevent the loss of raw materials and the decrease in production efficiency.

FIG. 1 is a schematic diagram of a pulverization classification line according to the present invention. FIG. 2 is an explanatory diagram of the stirring and grinding rotor of the present invention. FIG. 3 is an explanatory diagram of the stirring classification rotor of the present invention. FIG. 4 is a schematic diagram of a pulverization / classification line according to still another embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a pulverization / classification line 1 according to the present invention, in which cereals such as soybeans and rice, shells, ores (hereinafter also referred to as “crushed objects”) are pulverized to a desired particle size. The pulverization classification line 1 provided with the pulverization classifier 10 to perform is shown.

  The pulverization / classification line 1 includes a pulverization / classification machine 10, a pulverization object supply device 50, a product recovery device 60, and an incomplete product recovery device 70.

  The pulverizing and classifying machine 10 according to the present invention is a machine that pulverizes an object to be pulverized such as cereals such as soybean and rice, shells and ores into fine particles of 50 microns or less, preferably around 10 microns, and classifies them.

  This pulverization classifier 10 is roughly divided into a pulverization chamber 11, a rotor rotating shaft 12, a stirring and pulverizing rotor 13, a stirring and classifying rotor 14, a first shut-off device 15, and a second shut-off device 16. And it comprises a third shut-off device 17.

  The pulverization chamber 11 includes a pulverization chamber casing 11-1 that forms a cylindrical pulverization chamber, and a side casing 11-2 that is disposed on the upstream side of the pulverization chamber casing 11-1 and in which a raw material charging port 11-6 is formed. And disposed on the downstream side of the crushing chamber casing 11-1, and connected to the crushing chamber casing 11-1 on the large diameter side, and on the small diameter side communicated with the pulverized material take-out port 11-7. A frustoconical classification chamber casing 11-3 having a downstream end, and a rotating shaft holding case 11-4 that protrudes outward from the upstream end face of the side casing 11-2 and holds the rotor rotating shaft. And is composed of. The pulverized product outlet 11-7 is connected to a suction duct 61 connected to the product recovery device 60.

Moreover, the 1st interruption | blocking apparatus 15 is provided in the exit vicinity of the pulverized material taking-out port 11-7 of the classification chamber casing 11-3. When the pulverization / classification line 1 is stopped urgently, the first shut-off device 15 enters the product recovery device 60 where the pulverization / classification process has not been completed, that is, the unfinished product, and the pulverization / classification process is completed. In order to prevent the unfinished product from being mixed into the finished product, this is a device for blocking the path connecting the pulverizing and classifying machine 10 and the product recovery device 60.
As the 1st cutoff device 15, a solenoid valve etc. can also be used, for example.

  Moreover, the 2nd interruption | blocking apparatus 16 is provided in the entrance vicinity of the raw material inlet 11-6 of the side casing 11-2. The second shut-off device 16 is provided to prevent the object to be crushed from being continuously supplied to the pulverizing / classifying machine 10 when the pulverizing / classifying line 1 is urgently stopped. This is a device for blocking a path connecting the object supply device 50. As the 2nd cutoff device 16, a solenoid valve etc. can also be used, for example.

  Further, an unground product take-out port 11-8 connected to the unfinished product recovery device 70 is provided on the wall surface of the side casing 11-2. The unground product take-out port 11-8 has a third outlet. A shut-off device 17 is provided. By opening the third shut-off device 17, after the pulverization / classification line 1 has been urgently stopped, the pulverization target that has not completed the pulverization / classification process remaining in the pulverization / classification machine 10, that is, the unfinished product is pulverized. The classifier 10 can be recovered to the incomplete product recovery device 70. The configuration and function of the incomplete product collection device 70 will be described later. As the 3rd cutoff device 17, a solenoid valve etc. can also be used, for example, and a damper can also be used.

In order to prevent the crushing chamber 11 from becoming hot due to heat generated when crushing an object to be crushed, a water jacket is provided inside each of the crushing chamber casing 11-1 and the classification chamber casing 11-3. You may make it form.
Moreover, the rotating shaft holding case 11-4 provided to protrude outward from the upstream end face of the side casing 11-2 may be provided integrally with the side casing 11-2, or the rotating shaft holding case 11-4 The side casing 11-2 may be formed separately, and both may be coupled by a mechanical fastener, for example, a bolt and a nut.

  The rotor rotating shaft 12 rotates around the central axis of the crushing chamber 11, and is rotatably attached to the rotating shaft holding case 11-4 via a bearing. The rotor rotation shaft 12 is rotationally driven by a drive source provided outside the grinding chamber 11. For example, an electric motor 12-1 can be used as the drive source.

The rotor rotating shaft 12 includes at least one agitation pulverization rotor that agitates and crushes an object to be pulverized introduced from a raw material inlet 11-6 provided in a side casing 11-2 of the pulverization chamber 11 in the crushing chamber 11. 13 is fixed.
The stirring and grinding rotor 13 is provided with a plurality of stirring and grinding blades 13-1 radially.

  Further, a stirring classification rotor 14 is attached to the tip end side of the rotor rotating shaft 12. The stirring classification rotor 14 is close to and opposed to the inner peripheral surface of the frustoconical classification chamber casing 11-3, and has a plurality of stirring classifications having tip portions that are inclined along the inner peripheral surface. Blades 14-1 are provided radially.

  The stirring / pulverizing rotor 13 and the stirring / classifying rotor 14 are arranged at the end of the rotor rotating shaft 12 with a predetermined interval by a spacer, and the rotor rotating shaft 12 is formed by a pair of keys arranged on both sides in the diameter direction of the rotor rotating shaft 12. Is prevented from rotating. Further, a pressing plate is fixed to the end surface of the rotor rotating shaft 12 with a fixing bolt to prevent the stirring and grinding rotor 13 and the stirring classification rotor 14 from falling off from the end of the rotor rotating shaft 12.

  The agitating and grinding rotor 13 and the agitating and classifying rotor 14 are mainly in the crushing chamber casing 11-1 near the raw material inlet 11-6, and the agitating and classifying rotor 14 is mostly classified into the classification chamber casing 11-3. In the crushing chamber 11, the positioning is adjusted in the axial direction by a positioning sleeve whose end face abuts against one side surface of the stirring classification rotor 14.

  As shown in FIG. 2, the stirring and grinding rotor 13 is provided with four to twelve stirring and grinding blades 13-2 radially around a shaft hole 13-1 for attaching to the rotor rotating shaft 12 formed at the center. ing. These stirring and grinding blades 13-2 are formed in a thick propeller shape, and are made to be strong so that they can rotate at high speed to pulverize the raw material.

  As shown in FIG. 3, the agitation classifying rotor 14 is provided with 4 to 12 agitation classifying blades 14-2 radially about a shaft hole 14-1 to be attached to the rotor rotating shaft 12 formed in the center. ing. As shown in FIG. 1, the stirring classification blade 14-1 has an inclined front end surface 14-3 that is close to and opposed to the inner peripheral surface of the truncated cone shape of the classification chamber casing 11-3, as shown in FIG. The tip surface 14-4 parallel to the axial direction of the rotor rotating shaft 12, which becomes the maximum diameter portion of the stirring and classifying rotor 14, is formed continuously. This parallel front end surface 14-4 is formed to have a short length facing the inner peripheral surface of the crushing chamber casing 11-1 in close proximity. Note that a plurality of sets of the stirring and grinding rotor 13 and the classification and grinding rotor 14 may be provided side by side in the axial direction of the rotor rotating shaft 12.

  In addition, the corners and protrusions of the inner wall of the crushing chamber 11 are each formed by a concave curved surface or a smooth curved surface having a convex arc shape, and the entire inner wall is mirror-finished, so that the raw material is rich in oil like soybeans. When pulverizing the pulverized material, the pulverized material is less likely to adhere to the inner wall of the pulverization chamber 11.

  Further, in order to prevent the occurrence of corrosion and rust due to moisture contained in the raw material to be pulverized, the pulverization chamber 11, the rotor rotary shaft 12, the stirring and pulverizing rotor 13, which are the main components of the pulverization classifier 10, It is desirable to use stainless steel as a material for the stirring and classifying rotor 14 and the like.

  The pulverization object supply device 50 is connected to a raw material inlet 11-6 provided in the side casing 11-2 of the pulverization chamber 11, and supplies the pulverization object to the pulverization classifier 10. For example, as shown in FIG. 1, the pulverization target supply device 50 includes a hopper 51 that stores a pulverization target as a raw material, and a screw feeder 52 that is provided below the hopper 51.

  By rotating the screw feeder 52 with an electric motor or the like, the object to be crushed stored in the hopper 51 is supplied to the pulverizing and classifying machine 10.

  The product recovery device 60 is connected to a pulverized material outlet 11-7 provided in the classification chamber casing 11-3 of the pulverization chamber 11 via a suction duct 61, and collects the pulverized and classified fine powder product. To do.

  For example, as shown in FIG. 1, the product collection device 60 includes a suction duct 61, a suction fan 62, a bag filter storage container 63, a rotary valve 64, and the like.

  As described above, the unfinished product collection device 70 is connected to the unground product take-out port 11-8 provided on the wall surface of the side casing 11-2, and the unground product take-out port 11-8 is connected to the third shut-off. A device 17 is arranged. After the pulverization / classification line 1 is urgently stopped, the unfinished product recovery device 70 is used to recover the pulverized object that has not been crushed and classified in the pulverizer / classifier 10, that is, the unfinished product. Is done.

  As shown in FIG. 1, for example, the unfinished product collection device 70 includes a suction duct 71 that connects the unfinished product collection device 70 and an unground product outlet 11-8, a suction fan 72, and a bag filter storage container. 73. After the pulverization / classification line 1 is stopped urgently, the pulverization / classification process that is not completed in the pulverization / classification process, that is, the unfinished product, is recovered from the pulverization / classifier 10 to the unfinished product recovery device 70. In doing so, the third shut-off device 17 is opened, and the suction fan 72 of the incomplete product recovery device 70 is activated.

  When the third shut-off device 17 is opened and the unfinished product collecting device 70 is activated, the unfinished product staying in the pulverizing and classifying machine 10 is collected in the bag filter storage container 73 and the pulverizing and classifying machine 10 is restarted. It can be returned to a startable state. The unfinished product collected in the bag filter storage container 73 of the unfinished product collection device 70 can be reused by supplying it again to the pulverization classifier 10 via the pulverization object supply device 50. Become.

Next, an operation method of the pulverization / classification line 1 according to the present invention will be described.
The pulverizing / classifying machine 10 configured as described above sucks air from the pulverized material take-out port 11-7 provided in the classification chamber casing 11-3 of the pulverizing chamber 11 by the suction fan 62 through the suction duct 61 connected to the product recovery device 60. At the same time, the rotor rotating shaft 12 is driven by operating the electric motor 12-1, and the stirring and grinding rotor 13 and the stirring classification rotor 14 in the grinding chamber 11 are rotated at a high speed of 1800 to 18000 revolutions per minute. At this time, the first shut-off device is in an open state and the third shut-off device is in a closed state.

  By this high speed rotation, the air flow rotating around the rotor rotation shaft 12 in the grinding chamber 11 by the rotation of the stirring and grinding blade 13-1 of the stirring and grinding rotor 13 and the stirring and classifying blade 14-1 of the stirring and classifying rotor 14. Is generated. This air flow is an axial air flow from the raw material input port 11-6 to the pulverized material take-out port 11-7 by suction of the suction fan 62 at the center of the pulverization chamber 11, and as a result, suction is performed while swirling at high speed. A tornado-like spiral airflow that passes through the duct 61 is generated.

  Further, in the vicinity of the stirring and grinding blade 13-1 and the stirring and classifying blade 14-1, a centrifugal air flow directed radially outward is generated outside the spiral air flow. After the suction fan 62 and the rotor rotating shaft 12 are driven and the rotation state is stabilized, the grinding object supply device 50 is driven, and the raw material such as soybeans, that is, pulverized, is fed into the pulverizing chamber 11 from the raw material inlet 11-6. Insert the object. At this time, the second shut-off device is in an open state.

  Here, the raw material is supplied to the raw material inlet 11-6 by the above-described pulverization object supply device 50, and the opening degree of the damper is adjusted from the raw material hopper or the like so as to adjust the supply amount. Anyway. In order to control the supply amount of the raw material more accurately, it is desirable to use a supply unit such as the screw feeder 52 of the above-described pulverization target supply unit 50.

  The object to be crushed that has been introduced into the pulverization chamber 11 from the raw material inlet 11-6 is sucked into the pulverization zone formed inside the pulverization chamber 11 on the air flow generated by the suction of the suction fan 62. The object to be crushed that has entered the pulverization zone is first crushed into large and small particles by colliding with the edge of the stirring and pulverizing blade 13-1 rotating at high speed. Then, a part of the finely pulverized product generated at that time rides on the spiral air flow and is immediately carried to the classification zone formed inside the adjacent classification chamber casing 11-3.

  Most of the particles of the object to be pulverized carried to the pulverization zone are still coarse and large in mass, so they move radially outward in the pulverization zone and are agitated by the centrifugal air current and collide with each other. Alternatively, the particles are further finely pulverized by the collision between the particles and the inner peripheral surface of the pulverization chamber 11. Since the particle having such a fine particle size has a smaller centrifugal force than the coarse particle size, the particle moves toward the center of the pulverization zone, is captured by the spiral airflow, and moves to the classification zone.

  At this time, the pulverized fine powder of the object to be pulverized advances while being swirled around the central axis of the pulverization chamber 11 by the spiral air flow. Move radially inward.

  When these pulverized materials enter the classification zone, the stirring / classifying blade 14-1 rotating at high speed increases the rotational speed of the spiral airflow and generates a centrifugal airflow on the outside thereof. Among the pulverized products that have been fed from, the relatively coarse particles are moved to the outside of the spiral airflow by the action of centrifugal force and trapped in the centrifugal airflow, and some of them are agitated by the centrifugal airflow and become finer It is crushed.

  When the centrifugal air current collides with the inner peripheral surface of the frustoconical shape of the classification zone, the direction is changed to the grinding zone along the inclination of the inner peripheral surface, and along with this, the coarse pulverized product is returned to the grinding zone, where It is finely ground again. The relatively finely pulverized pulverized material sent to the classification zone and the pulverized material pulverized by the centrifugal airflow ride on the spiral airflow to the suction duct 61 connected to the product recovery device 60 from the pulverized material outlet 11-7. On the way, it is captured by the bag filter disposed in the bag filter storage container 63 before the suction fan 62 and is taken out via the rotary valve 64.

Next, an operation method when the pulverization / classification line 1 according to the present invention is brought to an emergency stop will be described.
When the pulverization / classification line 1 is urgently stopped due to an overload of the pulverization / classifier 10 or for other reasons, the product recovery device 60 is first stopped and the first shut-off device 15 is operated to be closed.

  Since the suction fan 62 used in the product recovery device 60 takes about 1 to 3 minutes to completely stop, the suction fan 62 stops completely when the first shutoff device 15 is left open. Until the pulverization / classification process is completed, the pulverization object that has not been pulverized / classified, that is, the unfinished product, is continuously sucked into the product recovery device 60, and the pulverized / classified process is not completed. The product will be mixed.

  However, by closing the first shut-off device 15 simultaneously with the emergency stop of the pulverization / classification line 1, it is possible to prevent the unfinished product from being mixed into the products for which the pulverization / classification process has been completed. it can.

  Further, when the pulverization / classification line 1 is urgently stopped, the pulverization object supply device 50 is stopped and the second shutoff device 16 is operated to be in a closed state. By doing in this way, supply of the grinding | pulverization target object to the pulverization classifier 10 is stopped immediately, and it can reduce that the grinding | pulverization target object in which the grinding | pulverization / classification process is not completed, ie, an incomplete product, is made. It becomes possible.

  Further, the pulverization / classification line 1 is urgently stopped, the pulverization / classification machine 10, the product recovery device 60, and the pulverization object supply device 50 are stopped, and the first blocking device 15 and the second blocking device 16 are closed. After that, before each of the pulverization classifier 10, the product collection device 60, and the pulverization target supply device 50 is completely stopped or after each device is completely stopped, the unfinished product collection device 70 is started, The third shut-off device is opened.

  By performing such a treatment, the unfinished product staying in the pulverizing / classifying machine 10 is collected in the bag filter storage container 73 of the unfinished product collecting apparatus 70 so that the pulverizing / classifying machine 10 can be restarted. Can be restored.

Next, a pulverization classification line according to still another embodiment of the present invention will be described with reference to FIG. The embodiment shown in FIG. 4 is different from the embodiment shown in FIG. 1 in that a foreign matter mixing prevention unit and a turning scraper are provided. In other respects, the embodiment shown in FIG. The embodiment shown in 1 is the same.
Here, only the differences will be described.

First, the foreign matter mixing prevention unit will be described.
In another embodiment shown in FIG. 4, foreign matter passes through the gap between the rotor rotating shaft 12 and the side casing 11-2 between the rotating shaft holding case 11-4 and the side casing 11-2 and enters the grinding chamber. A foreign matter mixing prevention unit 15 for preventing the mixing is provided.

  FIG. 4 shows an example of the foreign matter mixing prevention unit 18, which is provided on the rotary shaft holding case 11-4 side and between the sliding surfaces with the rotor rotary shaft 12. The first sealing portion 18-2 and the side casing 11-2 side, the second sealing portion 18-3 provided between the sliding surfaces of the rotor rotating shaft 12 and foreign matters (oil, grease) And the like, and a drain port 18-4 for discharging the foreign matter accumulated in the foreign matter collection chamber 18-1 to the outside.

An oil seal may be used for the first sealing portion 18-2, and a dust seal may be used for the second sealing portion 18-3.
Moreover, the main body of the foreign matter mixing prevention unit 18 is made of the same material as the side casing 11-2 and the rotating shaft holding case 11-4, and is formed integrally with the side casing 11-2 and the rotating shaft holding case 11-4. Alternatively, they may be configured separately from each other, and may be coupled by a mechanical fastener such as a bolt and a nut.

  Moreover, although the foreign material mixing prevention part 18 was demonstrated as being comprised from the 1st sealing part 18-2, the 2nd sealing part 18-3, the foreign material collection chamber 18-1, and the drain port 18-4, It is not limited to such a configuration. For example, it is possible to simplify the structure of the foreign matter mixing prevention unit 18 by using only the first sealing unit 18-2 or only the second sealing unit 18-3.

Next, the turning scraper will be described with reference to FIG.
As shown in FIG. 4, the crushing chamber 11 has an inner wall of the side casing 11-2 for scraping off the crushed material adhering to the inner wall of the side casing 11-2 provided with the raw material inlet 11-6. A first turning scraper 19-1 that is driven to rotate about the rotor rotating shaft 12 is provided.

Although the drive mechanism of the first swivel scraper 19-1 is not shown in FIG. 4, it can be driven to rotate by the following configuration.
That is, the first swivel scraper 19-1 is formed on the inner peripheral surface of the ring gear 19-3 having meshing teeth on the outer periphery that is rotatably provided between the side casing 11-2 and the crushing chamber casing 11-1. Is fixed, engaged with the ring gear 19-3, and the gear 19-4 driven by the motor is arranged outside the crushing chamber 11 to drive the motor, thereby rotating the first turning scraper 19-1. It can be driven.

Moreover, in order to scrape off the pulverized material of the raw material adhering to the inner wall of the classification chamber casing 11-3 provided with the pulverized material extraction port 11-7, the vicinity of the pulverized material extraction port 11-7 of the classification chamber casing 11-3 A second swivel scraper 19-2 that is driven to rotate about the rotor rotating shaft 12 is provided along the inner wall.
The second turning scraper 19-2 can also be driven to rotate using a drive mechanism similar to the drive mechanism of the first turning scraper 19-1.

Here, although the case where two scrapers, the first turning scraper 19-1 and the second turning scraper 19-2 are used, has been described, the present invention is not limited to such a configuration. Only one first or second swivel scraper may be used, or a scraper other than the first and second swivel scrapers may be provided and two or more scrapers may be used.

DESCRIPTION OF SYMBOLS 1 Crushing and classifying line 10 Crushing and classifying machine 11 Crushing chamber 11-1 Crushing chamber casing 11-2 Side casing 11-3 Classification chamber casing 11-4 Rotating shaft holding case 11-6 Raw material inlet 11-7 Crushing material outlet 11- 8 Ungrounded material outlet 12 Rotor rotating shaft 12-1 Electric motor 13 Stirring and grinding rotor 13-1 Stirring and grinding blade 14 Stirring and classifying rotor 14-1 Stirring and classifying blade 15 First shut-off device 16 Second shut-off device 17 Third shut-off device 18 Foreign matter prevention unit 18-1 Foreign matter collection chamber 18-2 First sealing portion 18-3 Second sealing portion 18-4 Drain port 19-1 First swivel scraper 19-2 2 swivel scraper 50 grinding object supply device 51 hopper 52 screw feeder 60 product recovery device 61 suction duct 62 suction § emissions 63 bag filter container 64 the rotary valve 70 unfinished product recovery unit 71 suction duct 72 the suction fan 73 bag filter container

Claims (6)

(1) a crushing chamber casing in which a cylindrical crushing chamber is formed;
A side casing that is disposed on the upstream side of the crushing chamber casing and in which a raw material charging port is formed on the upstream side;
A classification chamber casing that is arranged on the downstream side of the pulverization chamber casing and that defines a frustoconical classification chamber in which a pulverized material take-out port communicating with the suction duct is formed on the downstream side;
A crushing chamber comprising:
(2) A rotary shaft holding case that protrudes outward from the upstream end face of the side casing is rotatably attached, and is driven to rotate around the central axis of the grinding chamber by a drive source provided outside the grinding chamber. A rotor rotation axis;
(3) At least one stirring and grinding rotor fixed to the rotor rotating shaft, wherein a plurality of stirring and grinding blades for stirring and grinding the object to be ground introduced from the raw material charging port of the side casing are radially provided. A provided stirring and grinding rotor;
(4) A stirring and classifying rotor fixed to the tip end side of the rotor rotating shaft, facing the frustoconical inner peripheral surface of the classifying chamber and facing the inner peripheral surface, and inclined along the inner peripheral surface A stirring classifying rotor provided with a plurality of stirring classifying blades having a tip shape radially;
(5) a first shut-off device provided at the pulverized material outlet of the classification chamber casing;
Consists of
The pulverizing / classifying machine is characterized in that the first shut-off device is set to be closed when the pulverizing / classifying line is urgently stopped. In the pulverization classifier according to claim 1,
The apparatus further comprises a second shut-off device provided at the raw material inlet of the side casing, and the second shut-off device is set so as to be closed when the pulverization / classification line is urgently stopped. Crushing and classifying machine. In the grinding classifier according to claim 2 ,
A suction port is provided on the wall surface of the side casing, and the suction port is further provided with a third shut-off device, and the third shut-off device is a case where the pulverization / classification line is urgently stopped, and the first shut-off device And a pulverizing and classifying device, wherein the pulverizing and classifying device is set to be opened after the second shut-off device is closed. In the pulverization classifier according to claim 3,
A pulverizer / classifier further comprising an incomplete product recovery device connected to the suction port. In the pulverization classifier according to any one of claims 1 to 4,
A foreign matter mixing prevention unit that is provided between the rotary shaft holding case and the side casing and prevents foreign matter from entering the grinding chamber through a gap between the rotor rotary shaft and the side casing; A pulverizing and classifying machine. In the pulverization classifier according to any one of claims 1 to 5,
In order to scrape off the crushed material adhering to the inner wall surface of the pulverization chamber, the apparatus further comprises at least one or more swivel scraper provided inside the pulverization chamber and swirling along the inner wall surface of the pulverization chamber. Crushing classifier.