JP6570270B2 - Crusher with classification function - Google Patents

Description

  The present invention relates to a pulverizing apparatus with a classification function for pulverizing a resin, mineral, or the like in a pulverizing section attached to a rotor circumference rotating in a pulverizing chamber.

  2. Description of the Related Art Conventionally, there are pulverizers that pulverize an object to be processed by a rotor inside a cylindrical pulverization chamber and a liner attached to the peripheral surface of the pulverization chamber. In addition, a pulverizing apparatus has been developed that classifies pulverized objects to be processed and guides those that have not reached a predetermined particle size to the rotor again.

  For example, in a pulverization apparatus having a classification function of Patent Document 1, an object to be processed pulverized by a pulverization rotor at the lower part of the apparatus passes through the outer periphery of the powder processing chamber and is conveyed by airflow to a classification unit via a bypass path. The

  Further, as in a pulverizing apparatus having a classification function of Patent Document 2, there is known one in which a classification unit is configured with louver blades (classification blades) arranged on a circular top plate circumference. In this pulverization apparatus, the pulverized object to be processed is classified by the swirling flow generated by the classification blade.

JP 2007-209934 A JP 2010-094574 A

  However, the fixed classifier as in Patent Document 2 adjusts the angle of the classification blade according to the particle size to be classified, but adjusting the angle of each classification blade evenly is a complicated operation. In addition, the spiral angle of the swirling flow also changes, and a slight adjustment of the angle may cause the classification particle size to change considerably. Therefore, a very careful adjustment is necessary.

  The present invention has been made in view of the above points, and the object of the present invention is to easily adjust the flow path outlet area of the swirling flow by the classification blade according to the particle size to be classified in the pulverizer with a classification function. There is in doing so.

  In order to achieve the above object, in the present invention, the flow passage outlet area of the swirling flow is increased or decreased by the adjusting plate in the classification unit.

Specifically, the pulverizing apparatus with a classification function of the first invention is:
An outer casing;
An inner casing that forms a space that is at least partially partitioned from the outer casing;
An input port for inputting an object to be communicated with the inner casing;
A crushing chamber provided below the inner casing and provided with a crushing unit for crushing the object to be processed;
An air flow inlet communicating with the grinding chamber;
A blow-up passage formed between the inner casing and the outer casing, for passing the workpiece to be crushed and blown in the pulverization chamber;
A classifying unit that is provided in an upper part of the inner casing and classifies a workpiece to be treated by airflow from the blowing passage.

And the classification part is
A plurality of classification blades for classifying the object to be processed by swirling the airflow flowing into the classification unit;
And a plurality of adjusting plates for increasing or decreasing the area of the outlet of the flow path formed between the classifying blades of the swirling flow by the plurality of classifying blades.

  According to said structure, the airflow speed is adjusted by increasing / decreasing the flow-path exit area from a corresponding classification blade by each adjustment board, and the particle size to classify is controlled. In this case, parameters that greatly affect the swirling flow itself, such as the angle of the classification blades and the interval between the classification blades, do not change, and adjustment is very easy.

In particular , in the first invention,
The classification section is
A fixed-side member provided upright the plurality of classifying vanes spirally in the circumferential direction of the annular stationary top plate having a central through hole,
An adjustment member in which the plurality of adjustment plates are erected in the circumferential direction of the annular adjustment side top plate, and the plurality of adjustment plates are inserted into the central through hole of the fixed side member and are slidably stacked in the circumferential direction And have.

  According to the above configuration, if the adjustment member is rotated in the circumferential direction, the flow path outlet areas of the flow paths of all the classification blades can be adjusted uniformly at a time, so that the adjustment is further facilitated with a simple configuration.

In the second invention, in the first invention,
On the inner peripheral edge of the fixed side member is formed a stepped portion having a different inner diameter by a predetermined amount,
The classifying blade has an inner tip protruding from the stepped portion to form a slit portion,
A receiving portion for the adjustment plate is formed at the inner peripheral edge of the classification blade, the slit portion, and the fixed side member.

  According to said structure, the movement of the radial direction of an adjustment board can be controlled by inserting an adjustment board in a receiving part. For this reason, after setting the position of the adjustment plate, the adjustment plate is stabilized without moving.

In the third invention, in the first or second invention,
A handle that protrudes radially outward from the outer periphery of the fixed side top plate is integrally formed on the outer periphery of the adjustment side top plate.

  According to said structure, the position of an adjustment board can be easily adjusted by operating the handle which protrudes from the outer periphery of a fixed side top plate.

  As described above, according to the present invention, the classifying unit is provided with the classification blade that swirls the airflow that flows in and classifies the object to be processed, and the adjustment plate that increases or decreases the flow path outlet area of the swirling flow. By this, it is possible to easily adjust the flow path outlet area of the swirling flow by the classification blade and obtain a powder product having a desired particle size.

The fixed side member and the adjusting member are shown enlarged, (a) is a plan view and a partially enlarged plan view thereof, (b) is a sectional view taken along the line Ib-Ib of (a) and a partially enlarged sectional view thereof. . It is a figure showing the outline of the crushing system containing the crushing device concerning the embodiment of the present invention. It is sectional drawing which shows a grinding | pulverization apparatus. It is a perspective view which expands and shows a fixed side member. It is a perspective view which expands and shows an adjustment member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

-Configuration of grinding system-
FIG. 2 shows an outline of a pulverization system 10 including a pulverization apparatus 1 with a classification function according to an embodiment of the present invention. The pulverization system 10 includes a feeder 2 that supplies raw materials to the pulverization apparatus 1. The raw material as the object to be processed supplied from the supply machine 2 is configured to be supplied to the input port 11a of the crushing apparatus 1 through the supply rotary valve 3. The object to be processed may be supplied together with liquid nitrogen as a cooling liquid adjusted to an appropriate amount. On the other hand, the object to be processed pulverized by the pulverizing apparatus 1 is conveyed to the bag filter 4 together with the air flow by the exhaust fan 6. The airflow and the pulverized product are separated in the bag filter 4 so that the bag filter rotary valve 5 can be operated and taken out. An exhaust fan 6 is connected to the downstream side of the bag filter 4 so that the air in the crushing system 10 is discharged into the atmosphere. A drive unit 7 is provided below the pulverizer 1.

  As shown in FIGS. 2 to 4, the pulverizing apparatus 1 has a cylindrical outer casing 1 a, and a cylindrical inner casing 1 b having a smaller diameter is coaxially fixed therein. A crushing chamber 11 is also coaxially coupled below the inner casing 1b. For example, in the tangential direction of the crushing chamber 11, two air flow inlets 11b are formed symmetrically with respect to the central axis. In addition, the airflow inlet 11b may be one place and does not necessarily need to be formed in the tangential direction.

  A rotor 12 rotates in the lower part of the crushing chamber 11. The rotor 12 is driven by a drive unit 7 provided below the crushing chamber 11. Although not shown in detail, the rotor 12 is configured to be rotated by the power of the crushing electric motor 13 (shown only in FIG. 2). For example, a cylindrical crushing liner 17 is fixed to the inner peripheral surface of the crushing chamber 11. On the other hand, a plurality of crushing portions 18 are attached to the outer periphery of the rotor 12 so that the tip is close to the crushing liner 17.

  Further, as shown in FIG. 3, in the upper part of the inner casing 1 b, the airflow from the blowing passage 1 c is swirled, and the object to be processed that does not reach a predetermined particle size is dropped and returned to the inner casing 1 b. A classification unit 16 is disposed. Between the classification unit 16 and the crushing chamber 11, an input port 11a for supplying an object to be processed is provided so as to communicate with the inner casing 1b. The charging port 11a is formed inside a cylindrical body that is inserted so as to have an appropriate charging angle with respect to the outer casing 1a, and communicates with the inner casing 1b through the outer casing 1a. On the other hand, a discharge pipe 11c that discharges the object to be processed extends upward from the center of the upper end of the classifying unit 16.

  The airflow from the airflow inlet 11b passes through a predetermined passage toward the crushing chamber 11, and blows up the airflow passage 1c formed between the outer casing 1a and the inner casing 1b that separates the inside of the object to be processed while flying up. The air is conveyed to the upper classifying unit 16 through the air, and the object to be processed having a predetermined particle size is discharged out of the apparatus through the discharge pipe 11c. On the other hand, those that do not reach the predetermined particle size fall into the inner casing 1 b and are crushed again in the crushing chamber 11. At the center of the classifying portion 16, for example, a cone portion 16a that is tapered toward the central through hole 21a is disposed.

  As a feature of the present invention, as shown in FIGS. 1, 4, and 5, the classifying unit 16 includes a stationary member 20 that includes the classifying blades 22 and an adjusting member 30 that includes an adjusting plate 32.

  The fixed side member 20 is formed by, for example, a plurality of classification blades 22 standing in a spiral manner on an annular fixed side top plate 21 having a central through hole 21a. Eight are arranged at equal intervals. The number of sheets is not limited to this, and the length of each classification blade 22 and the interval between them can be freely set. On the inner peripheral edge, there are formed step portions 23 (shown enlarged only in FIG. 1 (a)) generated by different radii at eight locations according to the classification blade 22. The inner peripheral side tip edge 22a of each classification blade 22 protrudes from the corresponding stepped portion 23, thereby forming a linear (arc-shaped) slit portion 24 in plan view. In the classification blades 22, the slit portions 24, and the inner peripheral edges of the fixed side member 20, receiving portions 25 of the adjustment plate 32 are formed at substantially equal intervals in eight places. Although omitted in FIG. 4, the fixed-side top plate 21 is formed with bolt insertion holes 21 b that are attached to the flange portion 1 e of the outer casing 1 a at substantially equal intervals in the circumferential direction.

  On the other hand, the adjustment member 30 is composed of a plurality of adjustment plates 32 erected in the circumferential direction on an annular adjustment side top plate 31 having a through hole in the center. Eight adjustment plates 32 are arranged at equal intervals corresponding to the classification blades 22. As shown in FIG. 1, for example, a pair of handles 33 that protrude outward in the radial direction from the outer periphery of the fixed-side top plate 21 are integrally formed on the outer periphery of the adjustment-side top plate 31. The adjusting plate 32 may be flat or may be arcuate in accordance with the circumference to be arranged. As shown in FIG. 1, for example, the outer diameter of the adjustment side top plate 31 is set to be inside the bolt insertion hole 21b of the fixed side top plate 21 aligned in the circumferential direction. Then, the adjustment plate 32 is inserted into the central through hole 21a of the fixed member 20, and the bolt 21c is inserted into the bolt insertion hole 21b so that the classifying portion 16 is assembled. . An annular packing having a low sealing resistance but a high sealing property may be sandwiched between the fixed side top plate 21 and the adjustment side top plate 31. The handle 33 is disposed between the bolts 21c inserted through the pair of bolt insertion holes 21b. By operating the handle 33, the adjusting plate 32 can increase or decrease the area of the swirling flow path outlet. And the movement of the adjustment plate 32 in the radial direction can be regulated by inserting the adjustment plate 32 into the receiving portion 25 (slit portion 24). The slidable range of the handle 33 may be limited within the range between the bolts 21c, or the slidable range may be limited by providing a protrusion or the like on the fixed-side top plate 21 side.

-Operation of the grinding system-
First, in assembling the classifying unit 16, the adjustment plate 32 is inserted into the central through hole 21 a of the fixed side member 20, the fixed side member 20 and the adjustment side top plate 31 are overlapped, and then the adjustment member 30 is attached using the handle 33. It rotates and the edge part of the adjustment board 32 is inserted in the receiving part 25 (slit part 24).

  In the pulverization system 10 configured as described above, as shown by the white arrow in FIG. In this charging step, for example, a soft object to be processed is charged together with a cooling liquid such as liquid nitrogen.

  Then, the thrown object to be processed descends in a funnel 1d attached to the bottom of the inner casing 1b and falls on the rotor 12.

  The object to be processed that has fallen on the rotor 12 is carried to the outer periphery by centrifugal force, and is pulverized between the pulverization unit 18 and the pulverization liner 17.

  As shown by thin solid arrows in FIG. 3, the pulverized workpiece is lifted by the airflow introduced from the bottom of the pulverization chamber 11, and the blowing passage 1c in the gap between the inner casing 1b and the outer casing 1a. Then, it is introduced to the classifying unit 16 and classified.

  Specifically, the pulverized object to be processed is air-flowed and enters from the circumferential side of the classification unit 16, and is swirled by the swirl flow by the classification blade 22 inside the classification unit 16. A workpiece having a large particle size that does not reach the predetermined particle size collides with the inner peripheral surface of the classification blade 22 and falls again into the crushing chamber 11. The object to be processed that has reached a predetermined particle size turns along the classification blade 22 toward the central through hole 21a along the surface of the cone portion 16a, and is discharged from the discharge pipe 11c.

  Here, when adjusting the particle size to be classified, the handle 33 is operated to rotate the adjustment member 30 to change the position of the adjustment plate 32. The area of the flow outlet of the swirling flow changes depending on the position of the adjusting plate 32, and the flow rate of the swirling flow increases or decreases to change the classified particle size. The adjustment member 30 is preferably rotated within a range in which the adjustment plate 32 does not deviate from the receiving portion 25. When deviating from the receiving portion 25, a gap is formed between the adjustment member 30 and the classification blade 22, and the flow path area does not change.

  Next, the object to be processed pulverized by the pulverizing apparatus 1 is conveyed to the bag filter 4 together with the air flow by the exhaust fan 6 from the discharge pipe 11c. The airflow and the pulverized product are separated in the bag filter 4, and the pulverized product is taken out by operating the bag filter rotary valve 5.

  As described above, in the present embodiment, the air flow velocity is adjusted by increasing / decreasing the flow path outlet area from the classification blade 22 by the adjustment plate 32, and the particle size to be classified can be controlled. If the adjusting member 30 is rotated in the circumferential direction with the handle 33, the flow path outlets of all the classification blades 22 can be adjusted uniformly at a time. In this way, parameters that greatly affect the swirling flow itself, such as the angle of the classification blade 22 and the interval between the classification blades 22, do not change, and adjustment is easy. Further, when the adjustment plate 32 is inserted into the receiving portion 25, movement of the adjustment plate 32 in the radial direction is restricted.

  As described above, according to the present embodiment, the classifying blades 22 that swirl the airflow that flows into the classifying unit 16 to classify the object to be processed, and the adjustment plate 32 that increases or decreases the flow path outlet area of the swirling flow. By providing, the angle of the classification blade 22 can be easily adjusted to obtain a powder product having a desired particle size.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, the pulverization method includes a method in which the rotor 12 is provided in the pulverization chamber 11 (rotary type). A vortex type or the like in which a workpiece is rotated in a swirling flow and collides with the crushing liner 17 can be employed without being provided.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

1 Crusher (Crusher with classification function)
1a External casing
1b Inner casing
1c Blow-up passage
11 Crushing chamber
11a inlet
11b Airflow inlet
11c discharge pipe
16 class division
18 Grinding part
20 Fixed side member
21 Fixed top table
21a Center through hole
22 classification blade
22a Inner peripheral edge
23 steps
24 slits
25 acceptance department
30 Adjustment member
31 Adjustment side top plate
32 Adjustment plate
33 Handle

Claims (3)

An outer casing;
An inner casing that forms a space that is at least partially partitioned from the outer casing;
An input port for inputting an object to be communicated with the inner casing;
A crushing chamber provided below the inner casing and provided with a crushing unit for crushing the object to be processed;
An air flow inlet communicating with the grinding chamber;
A blow-up passage formed between the inner casing and the outer casing, for passing the workpiece to be crushed and blown in the pulverization chamber;
A classifying unit that is provided at an upper part of the inner casing and classifies the object to be processed which is air-flowed from the blowing passage;
The classification section is
A plurality of classification blades for classifying the object to be processed by swirling the airflow flowing into the classification unit;
A plurality of adjusting plates for increasing or decreasing the area of the outlet of the flow path formed between the classifying blades of the swirling flow by the plurality of classifying blades ;
The classification section is
A fixed-side member in which the plurality of classification blades are erected spirally in the circumferential direction of an annular fixed-side top plate having a central through hole;
An adjustment member in which the plurality of adjustment plates are erected in the circumferential direction of the annular adjustment side top plate, and the plurality of adjustment plates are inserted into the central through hole of the fixed side member and are slidably stacked in the circumferential direction A pulverizing apparatus with a classification function. In the grinding apparatus with a classification function according to claim 1 ,
On the inner peripheral edge of the fixed side member is formed a stepped portion having a different inner diameter by a predetermined amount,
The classifying blade has an inner tip protruding from the stepped portion to form a slit portion,
A pulverizing apparatus with a classification function, wherein a receiving portion for an adjustment plate is formed at the inner peripheral edge of the classification blade, the slit portion, and the fixed side member. In the grinding apparatus with a classification function according to claim 1 or 2 ,
A pulverizing apparatus with a classification function, characterized in that a handle protruding radially outward from the outer periphery of the fixed side top plate is integrally formed on the outer periphery of the adjustment side top plate.

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