KR20020032496A - Cylindrical mill - Google Patents

Abstract

PURPOSE: Provided is a cylindrical mill which shows an increased crushing efficiency without occurring the blockage of gap. CONSTITUTION: The cylindrical mill comprises a body component installed with a plurality of out grinding bar at its inner side; a cylindrical stirring component which stirs grinding media and raw material by rotatory power and is located in the body component(10); a center component(30) which is located in the stirring component and has a center grinding bar; a stirring axis(40) which is located at the upper center of the stirring component and transmits a rotatory power of motor to the stirring component; an exhaust plate(50) which exhausts air inflowed by air path of the stirring axis(40); a lower plate(60) which prevents the leakage of air inflowed with adhering closely to the exhaust plate(50); a collection plate for ground materials(70) which is located at the upper of the exhaust plate(50) and collects ground materials; and a collection plate for grinding media(80) having a protrusion for collection of grinding media on its upper side.

Description

Cylindrical Crusher {cylindrical mill}

The present invention relates to a cylindrical grinding device, and more particularly, having a cylindrical stirring member therein, the raw material introduced into the stirring member is advanced from the inside of the stirring member to the outside to be stirred with the grinding medium, and the pulverized product. And a pulverization apparatus for separating the pulverization medium using a centrifugal screen.

Conventionally, many studies and inventions have been made for an apparatus for crushing raw materials into fine particles. A pulverizing apparatus for pulverizing the raw material and the grinding media together to grind the raw material into fine particles is separated from the grinding medium and the pulverized product after the grinding is completed. The methods for separating the pulverized medium can be largely divided into a method using a gap screen and a method using centrifugation. The gap screen may pass through the pulverized product, but the pulverized medium may have a gap having a size that cannot pass therethrough to separate the pulverized product and the pulverized medium through the gap. However, this method has a problem in that the pulverized matter is adsorbed in the gap, so that clogging of the gap is likely to occur.

In addition, when the stirring blade is attached to a general bar shape and the stirring blade is rotated to stir, there is a problem that the grinding efficiency is significantly reduced near the inner shaft of the bar.

Accordingly, the present invention has been made to solve the above problems, the grinding efficiency is improved by lengthening the grinding path, the grinding apparatus that does not occur the gap clogging phenomenon by using centrifugal separation for the separation of the pulverized material and the grinding media It is intended to provide.

1 is a cross-sectional view of the grinding device according to an embodiment of the present invention

2: Top view of the air discharge plate

Figure 3: Cross section of the air discharge plate

Figure 4: Top view of the bottom plate

5: perspective view of the crushed matter collecting plate

6 is a perspective view of the pulverized medium collecting plate

7: Cross section of stirring shaft and lower plate

8: Assembly drawing of stirring shaft and plates

Figure 9: Flowchart of raw materials and cooling water

<Description of the reference numerals for the main parts of the drawings>

10: body member 20: stirring member

30: center member 40: stirring shaft

50: air discharge plate 60: lower plate

70: crushed matter collecting plate 80: crushed medium collecting plate

In order to achieve the above object, the present invention provides a pulverization apparatus in which a pulverization medium and a raw material are agitated and pulverized, comprising: a body member having a plurality of out pulverization bars installed on an inner circumferential surface thereof; A cylindrical stirring member installed in the body member and having a pulverizing bar penetrating through an outer circumferential surface and an inner circumferential surface to stir the grinding medium and the raw material by the rotational force of the motor; A center member installed inside the stirring member and provided with a center grinding bar; A stirring shaft formed therein for passage of raw materials, discharge of pulverized material, circulation of the pulverized medium and inflow of air, and installed at an upper center of the stirrer to transfer the rotational force of the motor to the stirrer; A through hole for inserting the stirring shaft in the center in the form of a circular plate, and a plurality of through holes for fastening the bolts are formed around the air discharge plate through which the air introduced through the air passage of the stirring shaft is discharged; In the form of a circular plate, a hole is formed at the center for insertion of the stirring shaft, and a plurality of holes for fastening the bolts are provided around it, which is installed under the air discharge panel and is in close contact with the air discharge plate and leaks of air introduced into the air discharge plate. Lower plate to prevent the; In the form of a circular plate is formed in the center through the hole for the insertion of the stirring shaft, a plurality of through holes for fastening the bolt is provided around, located on the upper side of the air discharge plate, a pulverized material for collecting the crushed material on the lower surface A pulverized product collecting plate formed with a collecting protrusion; In the form of a circular plate, a through hole is formed at the center for insertion of a stirring shaft, and a plurality of through holes for fastening bolts are provided around the pulverized medium collecting protrusion for collecting the crushed medium on the upper surface thereof in a direction opposite to the rotational direction. A pulverized medium collecting plate formed in the outside; It is configured to include.

In this case, it is preferable to be coated with a material having elasticity on the surface in contact with the grinding medium. In addition, the apparatus comprises a pulverizing device cooling tube which forms a hollow spiral, is installed outside the body member flows the cooling water; A raw material tank cooling tube formed in a hollow spiral and installed in the raw material tank, through which cooling water flows; Cooling water supply means for supplying cooling water to the grinding apparatus cooling tube and the raw material tank cooling tube; It is preferable to comprise.

Hereinafter, with reference to the accompanying drawings will be described in detail a cylindrical grinding device according to an embodiment of the present invention. 1 is a cross-sectional view of a cylindrical grinding device according to an embodiment of the present invention. Figure 2 is a plan view of the air discharge plate, Figure 3 is a cross-sectional view of the air discharge plate. 4 is a plan view of the lower plate, FIG. 5 is a perspective view of the pulverized matter collecting plate, and FIG. 6 is a perspective view of the crushed medium collecting plate. 7 is a cross-sectional view of the stirring shaft and the lower plate and FIG. 8 is an assembly view of the stirring shaft and the plates. 9 is a flowchart of raw materials and cooling water.

Cylindrical grinding device according to an embodiment of the present invention is large body member 10, stirring member 20, the center member 30, the stirring shaft 40, the air discharge plate 50, the lower plate 60, It can be divided into a pulverized matter collecting plate 70, a crushed medium collecting plate (80).

First, the trunk member 10 will be described. The body member 10 is provided with an out-grinding bar 11 for pulverization on the inner circumferential surface in a cylindrical shape with an upper portion. And the outer peripheral surface of the body member 10 is provided with a helical tubular grinding device cooling tube 12 is to cool the inside of the grinding device by the cooling water supplied by the cooling water supply means provided separately.

A raw material tank cooling tube having a spiral tubular shape is also installed around the raw material tank for storing the raw material to cool the raw material in the raw material tank by the cooling water supply means.

The stirring member 20 is installed in the body member 10 and is formed in a cylindrical shape and is provided with a pulverizing bar 21 penetrating from the inner circumferential surface to the outer circumferential surface. The upper part of the stirring member 20 is formed with a plurality of holes formed with a screw thread for fastening the bolt.

The center member 30 has a circumferential shape installed at the center of the inner bottom of the body member 10, and a center grinding bar 31 corresponding to the pulverizing bar 21 of the stirring member 20 is installed.

The stirring shaft 40 is formed in a cylindrical shape to transmit the rotational force transmitted from the motor to the stirring member 20. Inside the stirring shaft 40, a raw material passage 41b for inflow of raw materials and a grinding medium path for circulation of the grinding media are formed, and the grinding material passage 42b for discharging the pulverized material and for the inflow of air are provided. An air passage 43b is formed. The passages are formed inside the stirring shaft 40 so as not to overlap each other, and formed inward from the outer circumferential surface of the stirring shaft 40 so that inlets or outlets connected to the passages have different heights and have a predetermined angle therebetween. This prevents the connection.

The raw material inlet (41a) is formed at the top and connected to the raw material passage (41b), the raw material passage (41b) is connected to the lower end surface of the stirring shaft 40 to lower the raw material introduced from the inlet to the stirring shaft (40) Will be discharged into the stirring member 20 of the inside.

The pulverized product discharge port 42a is installed at the lower portion of the raw material inlet 41a, and is connected to the upper portion of the pulverized material passage 42b, and is provided at the outer circumferential surface of the stirring shaft 40 at the lower portion of the pulverized product passage 42b. The installed crushed matter collecting port 42c is connected.

An air inlet 43a is formed at a lower portion of the pulverized product discharge port 42a and is connected to the air passage 43b. The lower portion of the air passage 43b is connected to the air outlet 43c formed at the lower portion of the stirring shaft 40 to discharge the air introduced from the air inlet 43a through the air outlet 43c.

The lower portion of the air inlet 42a is formed with a pulverizing medium collecting hole 44a, which is connected to the pulverizing medium passage 44b and serves to feed the collected pulverizing medium back into the pulverizing device. Here, instead of separately configuring the grinding medium passage 44b and the raw material passage 41b, the raw material and the grinding medium may be introduced into the grinding apparatus together.

The air discharge plate 50 is formed in a disk-shaped through-hole for the insertion of the stirring shaft 40 in the center, a plurality of through-holes 51 for fastening the bolt is formed around. The upper portion of the air discharge plate 50 is flat and the lower outer side protrudes downward in a band shape, and a plurality of air discharge pipes 53 are formed at the protruding portion 52.

The lower plate 60 is formed in a disk-shaped through-hole for the insertion of the shaft in the center, a plurality of through-holes for fastening the bolt is formed around. The air installed below the air discharge plate 50 is in close contact with the protrusion 52 of the lower outer band of the air discharge plate 50, and the air introduced through the air inlet 43a of the stirring shaft 40 is the air. It is to be discharged only in the air discharge pipe 53 formed on the discharge plate (50).

The pulverized product collecting plate 70 is formed in a disk-shaped through-hole for the insertion of the shaft in the center, a plurality of through-holes 72 for fastening the bolt is formed around. The upper part of the pulverized matter collecting plate 70 is flat and the pulverized object collecting protrusion 71 is formed at the lower part of the pulverized object collecting plate 70 to collect the pulverized material. The crushed matter collecting protrusion 71 is configured to be inclined in the rotational direction to prevent the crushed medium from flowing into the inside. The pulverized medium and the pulverized material are separated by the air discharged through the air discharge pipe 53, and the extremely fine pulverized material is collected and discharged through the pulverized matter collecting port 42c compared to the pulverized medium.

The pulverized medium collecting plate 80 has a disk-shaped through-hole formed at the center thereof, and a plurality of through-holes 82 for fastening bolts are formed around it. The lower part of the pulverized medium collecting plate 80 is flat, and the pulverized medium collecting protrusion 81 is formed at the upper part of the crushed medium collecting plate 80 to collect the pulverized medium. The grinding media collection protrusion 81 is configured to be inclined in a direction opposite to the direction of rotation to collect the grinding media.

However, the pulverized matter collecting plate 70 and the pulverized medium collecting plate 80 are not limited to separate original plates. The pulverized matter collecting plate 70 and the crushed medium collecting plate 80 may be integrally formed. 5, 6 and 8, the pulverized medium collecting plate 80 and the pulverized matter collecting plate 70 may be manufactured and combined in the same shape.

In this case, the contact surface of the grinding media in contact with the grinding media is coated with an elastic material such as urethane to protect the contact surface by preventing the material forming the contact surface from being mixed with the raw material by the grinding media. .

Hereinafter, the operation effect by the above configuration will be described.

The raw material introduced through the raw material inlet formed in the stirring shaft 40 is introduced into the stirring device in which the stirring member 20 is rotated, and the grinding medium and the raw material previously introduced into the stirring device are stirred together to be pulverized. The stirring raw material and the pulverizing medium are moved from the upper side of the stirring member 20 to the lower side while being stirred, and are then moved up between the stirring member 20 and the body member 10.

The pulverized material in which the raw material is pulverized is separated from the pulverized medium by the air introduced through the air inlet and discharged through the air discharge pipe 53 of the air discharge plate 50. The separated pulverized material is moved inside through a space formed between the pulverized matter collecting protrusions 72 under the pulverized matter collecting plate 70 and through a pulverized matter collecting hole 42c formed in the stirring shaft 40. The pulverized material is collected and discharged. At this time, the pulverized medium is prevented from being introduced into the inside by the pulverized object collecting protrusion 72.

In addition, the pulverized medium separated from the pulverized material is moved to the upper side and moved inside by the pulverized medium collecting protrusion 82 formed on the pulverized medium collecting plate 80, and the pulverized medium collecting port formed on the stirring shaft 40. It is moved to the stirring member 20 together with the raw material through 44a and used for grinding the raw material.

As described above, the cylindrical grinding device according to an embodiment of the present invention has the advantage that the grinding path is long and the grinding efficiency is improved, and the separation of the grinding medium and the grinding material is facilitated by using a centrifugal screen.

Claims (3)

In the grinding device in which the grinding medium and the raw material is agitated and ground together, A body member provided with a plurality of out grinding bars on an inner circumferential surface thereof; A cylindrical stirring member installed in the body member 10 and having a pulverizing bar penetrating through an outer circumferential surface and an inner circumferential surface to stir the grinding medium and the raw material by the rotational force of the motor; A center member installed inside the stirring member and provided with a center grinding bar; A stirring shaft formed therein for passage of raw materials, discharge of pulverized material, circulation of the pulverized medium and inflow of air, and installed at an upper center of the stirrer to transfer the rotational force of the motor to the stirrer; A through hole for inserting the stirring shaft in the center in the form of a circular plate, and a plurality of through holes for fastening the bolts are formed around the air discharge plate through which the air introduced through the air passage of the stirring shaft is discharged; In the form of a circular plate, a hole is formed at the center for insertion of the stirring shaft, and a plurality of holes for fastening the bolts are provided around it, which is installed under the air discharge panel and is in close contact with the air discharge plate and leaks of air introduced into the air discharge plate. Lower plate to prevent the; In the form of a circular plate is formed in the center through the hole for the insertion of the stirring shaft, a plurality of through-holes for fastening the bolt is provided around, the bottom of the pulverization collecting projections for collecting the pulverization is formed, the air vessel A pulverized material collecting plate installed at an upper portion of the publication to collect pulverized material; In the form of a circular plate, a through hole is formed at the center for insertion of a stirring shaft, and a plurality of through holes for fastening bolts are provided around the pulverized medium collecting protrusion for collecting the crushed medium on the upper surface thereof in a direction opposite to the rotational direction. A pulverized medium collecting plate formed in the outside; Cylindrical crusher, characterized in that configured to include. The method of claim 1, wherein the device, Cylindrical crushing device characterized in that the surface is in contact with the grinding media is coated with an elastic material. According to claim 1, wherein the device, A pulverizing device cooling tube which forms a hollow spiral and is installed outside the body member and flows cooling water; A raw material tank cooling tube formed in a hollow spiral and installed in the raw material tank, through which cooling water flows; Cooling water supply means for supplying cooling water to the grinding apparatus cooling tube and the raw material tank cooling tube; Cylindrical crusher, characterized in that configured to include.