JP2002028514A - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase crushing efficiency. SOLUTION: The interior of a crushing vessel 2 is divided into an inside chamber 19 and an outside chamber 20 by a separator 9, a stirring member 21 being installed in a freely rotatable manner, in the inside chamber 19. The separator 9 is of such a construction that a partition 10 is formed of a plurality of superposed rings 11 with an outer peripheral area formed in a circular shape and an inner peripheral area formed in a polygonal shape and a plurality of support shafts 12 are positioned on the outer peripheral side of the partition 10 and each of support shafts 12 has a plurality of spacers 13, each of which is partially interposed between the adjacent rings 11 and 11 and that a plurality of openings 14 which make the outside of the partition 10 communicate with its inside between the adjacent rings 11 and 11. The material to be crushed is supplied into the inside chamber 19 and the stirring member 21 is rotated. Consequently, the material is stirred with a crushing medium and crushed. Further, the material is subjected to a strong shearing force by the collaboration of the stirring member 21 and the inner peripheral area of a polygonal shape of the inside chamber 19. Thus the crushing efficiency is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher, and more particularly to a dispersion of ink and paint, ceramics, metals, inorganic substances,
The present invention relates to a media stirring type wet pulverizer effective for pulverizing and dispersing organic substances, magnetic substances, pigments, pharmaceuticals, and the like.

[0002]

2. Description of the Related Art There are various types of media stirring type wet pulverizers.
A crusher described in JP-A-230182 is generally known.

This pulverizer is a pulverizer for efficiently pulverizing a large flow rate of processed material. The pulverizer has a cylindrical shape with both ends closed, and an inner chamber provided in the pulverizer. And a cylindrical separator partitioned into two chambers, an outer chamber and a stirring member rotatably provided in the inner chamber of the pulverizing container.

[0004] When the processed material is supplied into the inner chamber of the crushing vessel by rotating the stirring member, the processed material is dispersed and stirred together with the crushing media, and is pressed in layers to the separator side by the action of centrifugal force. The rotating force is also applied to the rotating force, and a strong shearing force is applied, whereby the processed material is pulverized and dispersed. In this case, since the direction in which the centrifugal force acts and the direction in which the processed material flows are the same, the processed material is reasonably and uniformly pulverized and dispersed.

However, even in the pulverizer having the above-described configuration, the efficiency of exchanging the kinetic energy of the power source for the pulverization of the processed material is still lower than various energy conversion efficiencies. Has become.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and there is provided a pulverizer capable of significantly improving the efficiency of exchanging kinetic energy of a power source for pulverizing a processed material. It is intended to provide.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a pulverizing container, and a pulverizing container provided in the pulverizing container and having two chambers, an inner chamber and an outer chamber. Along with partitioning, a separator having an opening communicating between both chambers, a stirring member rotatably provided in the inner chamber, and a supply port for supplying a processed material into the inner chamber,
In a pulverizer having a discharge port for discharging a processed material from the outer chamber, a means in which the inner chamber is formed in a polygonal shape is employed. In addition, the separator has an inner peripheral surface formed in a polygonal shape, and a plurality of rings each having an outer peripheral surface formed in a circular shape are overlapped with each other to form an opening communicating between the inner and outer peripheral surfaces between adjacent rings. In this case, the following means is adopted.

[0008]

According to the present invention, by employing the above-described means, when the processed material is supplied from the supply port into the inner chamber of the crushing container by rotating the stirring member, the processed material is stirred together with the crushing media in the inner chamber. Dispersed and pulverized. In this case, a strong shearing force is applied to the processed material and the grinding media by the rotation of the stirring member and the polygonal inner chamber. Then, when the processed material reaches a predetermined particle size, the processed material is separated from the pulverizing media by the separator, flows into the opening of the separator, passes therethrough, flows into the outer chamber, and is discharged from the outer chamber through the discharge port to the pulverizing container. It will be discharged outside.

[0009]

Embodiments of the present invention shown in the drawings will be described below. 1 to 5 show an embodiment of a pulverizer according to the present invention. The pulverizer 1 is a continuous media stirring type wet pulverizer, and has a cylindrical shape with both ends closed. , A stirring member 21 rotatably provided inside the crushing container 2, and a separator 9 provided inside the crushing container 2.

The pulverizing container 2 comprises a cylindrical container body 3 having one end closed, and a disk-shaped lid 6 closing the other end opening of the container body 3. Body 3
A cylindrical boss 4 communicating the inside and outside of the container body 3 is integrally provided at the central portion of one end where the agitating member 21 is rotatable by a bearing 5 attached to a portion inside the boss 4. It has become supported.

A cylindrical separator 9 is provided inside the pulverizing container 2 so that the axis thereof substantially coincides with the axis of the pulverizing container 2. There are 20 compartments.

At the center of the lid 6, a cylindrical supply port 7 communicating the inside and outside of the inner chamber 19 is provided integrally. Through this supply port 7, ink, paint, ceramic, metal, Processed materials such as inorganic substances, organic substances, magnetic substances, pigments, and pharmaceuticals are supplied.

The cylindrical portion of the container body 3 includes an outer chamber 20.
A cylindrical discharge port 8 communicating the inside and the outside is provided integrally, and through the discharge port 8, the processed material flowing out of the inner chamber 19 through the opening 14 of the separator 9 and flowing into the outer chamber 20 is discharged. It is designed to be discharged outside.

The crushing container 2 is formed short in the axial direction. That is, it is formed such that the ratio of L (length in the axial direction) / D (diameter) becomes small. In this embodiment, the L / D ratio is set to L / D ≦ 1.0. When L is reduced, D is increased so that the inner chamber 19 can be reduced.
(Pulverization area) can secure a sufficient volume, and can obtain a predetermined pulverization efficiency.

The separator 9 includes a plurality of annular rings 1.
The cylindrical partition 10 is formed by superimposing 1, 11,..., And a plurality of support shafts 12 are located on the outer peripheral side of the partition 10 at predetermined intervals in the circumferential direction. Are mounted, a part of each spacer 13 is interposed between adjacent rings 11, 11, and a partition 10 is provided between the adjacent rings 11, 11.
Are formed with a plurality of slit-shaped openings 14 communicating between the inner and outer peripheral surfaces.

The shape of the opening 14 of the separator 9 is not limited to the slit shape, but may be any other shape. here,
The reason why the opening 14 of the separator 9 is formed in a slit shape is that the dimensions of the slit-shaped opening 14 can be arbitrarily changed by changing the thickness of the spacer 13. This is because the thickness of the spacer 13 can be appropriately set according to the processing conditions described above.

Each of the rings 11 of the separator 9 has a rectangular cross section (in this embodiment, the cross section is square, but not limited to this), and has an annular inner surface. It is formed in a polygonal shape (in this embodiment, formed in a regular octagonal shape, but is not limited to this), and an outer peripheral surface is formed in a circular shape.

A plurality of rings 11 having such a shape are superimposed on each other so that each apex angle of the inner peripheral surface of each ring 11 is located on the same vertical line. The partition wall 10 having a circular surface can be formed.

At the upper and lower portions of the partition 10, annular ring retainers 15 and 16 are located, respectively.
5, the upper end of each support shaft 12 is fitted, and a bolt 18 into which a lower ring retainer 16 is inserted is screwed into the lower end of each support shaft 12 and tightened with a predetermined torque, thereby securing each ring 11 The spacers 13 can be brought into close contact with each other, and the unitized separator 9 can be formed.

The unitized separator 9 can be integrally detachably mounted in the crushing container 2 and is supported between the inner surface of the lid 6 and the bottom surface of the container body 3 when mounted in the crushing container 2. , Is held at a predetermined position in the crushing container 2.

Then, the separator 9 having the above-described configuration is used.
The inside of the crushing container 2 is radially partitioned into two chambers, an inner chamber 19 and an outer chamber 20, and each opening of the separator 9 is formed between the inner chamber 19 and the outer chamber 20. Part 1
4, the processing objects in the inner chamber 19 can flow out into the outer chamber 20 through the openings 14 of the separator 9. In this case, the inner chamber 19
The outer peripheral portion is formed in a polygonal shape by the polygonal inner peripheral surface of the partition wall of the separator 9, and the inner peripheral portion is formed in a circular shape by the circular outer peripheral surface of the separator 9 in the outer chamber 20. .

The stirring member 21 has a cylindrical shape with one end closed, and is rotatably provided in the inner chamber 19 of the crushing container 2. On the outer peripheral side of the cylindrical portion of the stirring member 21, the concave portion 22 and the convex portion
Are provided alternately. Each recess 22 is provided with a through hole 24 penetrating therethrough in and out. Through this through hole 24, the processing object and the pulverizing media flow between the inside and outside in the radial direction of the stirring member 21. .

At one closed end of the stirring member 21,
A plurality of through holes 25 penetrating therethrough in and out are provided. The through holes 25 are located at predetermined intervals on substantially concentric circles around the axis of the stirring member 21.
The processed material and the pulverized media flow mutually between the inside and outside in the axial direction of the stirring member 21 through the.

A cylindrical projection 26 is integrally provided at the center of the closed one end of the stirring member 21. The outer peripheral side of the projection 26 is fitted to the inner peripheral side of the bearing 5 mounted in the boss 4 of the container body 3, and is rotatably supported by the bearing 5. The distal end of a drive shaft 27 rotatably supported by the bearing 5 is fitted to the inner peripheral side of the protrusion 26. The stirring member 21 includes
Dispersing member 28 also serving as a lock nut from the inner side of
Is screwed to the tip of the drive shaft 27 and tightened with a predetermined torque so that the drive shaft 27 is integrally connected to the drive shaft 27.

A concave portion 29 and a convex portion 30 are alternately provided on the head of the dispersing member 28 over the entire circumference. The supplied processed material and the crushing media located in the inner chamber 19 are dispersed radially outward.

The peripheral speed of the stirring member 21 is usually 8 m / s to 1
6 m / s. The larger the peripheral speed is, the better the crushing efficiency is, but a larger power is required. Therefore, the optimum peripheral speed differs depending on the degree of pulverization or the processed material, and it is necessary to select the optimum peripheral speed according to the processing conditions.

The processing time is 1 to 30 seconds per pass. The residence time is preferably shorter, but it is necessary to select an optimal residence time according to the processing conditions as with the peripheral speed.

The pulverizing medium includes zirconia beads, steel beads, ceramic beads, glass beads and the like, and the diameter of the medium is 0.1 mm to 2 mm. The filling amount is 20 to 60 in the crushing container 2.
%. The finer the grinding media, the smaller the diameter and the larger the filling amount, the finer the grinding is possible.However, the degree of grinding, the shape and properties of the processed material differ depending on the application, and it is the most suitable for the application and the processed material. You need to choose. Further, the same selection is necessary for the material.

Next, the operation of the above-described device will be described. First, a drive source (not shown) is operated to drive the drive shaft 27.
Is rotated, the stirring member 21 connected to the drive shaft 27 rotates integrally with the drive shaft 27, and the dispersion member 28 located at the center of the stirring member 21 also moves to the stirring member 2.
1 and rotate together.

Then, the processed product is supplied from the supply port 7 to the pulverizing container 2.
Is supplied to the inside of the inside chamber 19 of the dispersing member 2.
8 and is dispersed radially outward together with the crushing media, and is stirred by the stirring member 21.

In this case, since the cylindrical portion of the stirring member 21 is provided with a through hole 24 penetrating inward and outward in the radial direction, a strong centrifugal force acts on the processed material and the pulverizing media by the through hole 24. Then, the processed material and the pulverized media flow from the through hole 24 to the outer peripheral side of the stirring member 21.

The processed material and the pulverized media flowing to the outer peripheral side of the stirring member 21 are condensed on the outer peripheral side of the stirring member 21 by the concave portion 22 and the convex portion 23 of the stirring member 21 and the polygonal outer peripheral portion of the inner chamber 19. (A polygonal inner peripheral surface of the separator 9), a strong shearing force is applied to the stirring member 21.
, And flows inside the stirring member 21 through the gap between the lid 6 and the stirring member 21. In addition, a part of the through-hole 2 in a closed part of the stirring member 21 passes through a gap between the stirring member 21 and the container body 3.
From 5, it flows inside the stirring member 21 and circulates inside the inside chamber 19 along such a series of flows.

By circulating the processed material and the crushing media inside the inner chamber 19 in this way, the two are completely mixed as a whole, and the processed material is gradually crushed into fine particles to a predetermined particle size. Reach.

When the processed material having reached a predetermined particle size flows to the outer peripheral side of the stirring member 21, it is separated from the pulverized media by the separator 9, flows into the slit-shaped opening 14 of the separator 9, and flows therethrough. The water flows into the outer chamber 20 and is discharged from the outer chamber 20 to the outside of the crushing container 2 through the discharge port 8.

In the crusher 1 according to this embodiment configured as described above, the L / D ratio of the crushing container 2 is reduced (1.0 or less), and D is reduced by the reduced L. Since it is large, the volume of the inner chamber 19 (crushing area) can be sufficiently secured, and a strong centrifugal force can be obtained.

Further, the separator 9 for separating the processing object and the pulverized media includes a plurality of rings 11 and a plurality of spacers 1.
A plurality of slit-shaped openings 14 are formed by a combination of the plurality of support shafts 3 and a plurality of support shafts 12 to form a unit, and the unitized separator 9 is provided inside the pulverizing container 2 in a state where the axes are substantially aligned. Therefore, it is possible to secure an effective area sufficient for processing a large flow rate of the processed material. Therefore, the flow of the processing object is not restricted by the separator 9, and it is possible to sufficiently cope with the processing of the processing object having a large flow rate.

Further, a dispersing member 28 is provided at the center of the stirring member 21, a through hole 24 penetrating through the inside and outside in the radial direction of the cylindrical portion of the stirring member 21, and a shaft is provided at one end where the stirring member 21 is closed. Since the through-holes 25 penetrating in and out of the direction are provided, it is possible to circulate the processed material and the crushing media using the entire inner chamber 19. Therefore, the crushing media and the processed material are not biased to a part of the inside of the crushing container 2 to affect the operation or to make the operation difficult, and good operation characteristics can be obtained for a long time. become.

Further, the grinding media revolves and rotates along the inner peripheral surface of the separator 9 located at the outer peripheral portion of the inner chamber 19, and in this case, the inner peripheral surface of the separator 9 is formed in a polygonal shape. Therefore, the revolving direction of the grinding media revolving along the inner peripheral surface of the separator 9 constantly changes, and the rotation of the grinding media increases with the change.
Therefore, the change in the revolving direction of the grinding media and the increase in the number of revolutions amplify the shearing action on the processed material, and can greatly improve the grinding efficiency of the processed material.

In the above description, the plurality of rings 11 constituting the partition walls 10 of the separator 9 have the same shape (regular octagonal shape), and the apex angle of the inner peripheral surface of each ring 11 is the same. A plurality of rings 11 are overlapped so as to be positioned on a vertical line, and an inner chamber 19 having an outer peripheral portion having a regular octagonal shape is formed on the inner peripheral side of the separator 9. A plurality of rings 11 are shifted in the direction
May be overlapped to form an inner chamber 19 having a spiral inner peripheral surface on the inner peripheral side of the separator 9. In that case, each apex angle of the inner peripheral surface of each ring 11 is located at a position deviated from the same vertical line, so that the inner chamber 19
The number of apex angles that form the inner peripheral surface of the first embodiment increases. That is, the inner chamber 19 has the same number of apex angles as the total number of apex angles of the inner peripheral surfaces of the plurality of rings, and has a complicated shape. Further, although not shown, a plurality of rings having different shapes of the inner peripheral surface may be overlapped to increase the number of apical angles of the inner peripheral surface of the inner chamber 19, so that the shape of the inner chamber 19 may be complicated. Even if such a polygonal shape is difficult to obtain, a strong shearing force can be applied to the processed material due to the inner peripheral surface of the ring having corners.

FIG. 6 shows a batch processing system 31 constituted by using the crusher 1 according to the present invention. That is, the batch processing system 31 includes the crusher 1 described above, a service tank 33 connected to the crusher 1 via a circulation line 32, and a circulation pump 34 provided in the middle of the circulation line 32. I have.

This batch processing system 31 is effective when sufficient pulverization cannot be performed by one pulverization.
In particular, it is effective when producing a small quantity of many kinds of products. In this case, a large number of movable tanks can be used as the service tank 33, and these can be sequentially replaced and used. When it is necessary to clean the inside of the crusher 1 by switching the product, the inside of the crusher 1 is crushed by connecting and operating a service tank 33 containing a cleaning liquid such as a detergent or a rinsing liquid. The media, the circulation line 32 and the like can be completely cleaned.

An embodiment of the crusher according to the present invention will be described below. In this example, a comparison test between a separator using a regular octagonal ring and a separator using a circular ring was performed by the batch processing system 31 described above. Sampling of the processed material was performed at the holding tank inlet of the circulation route. The particle size was measured by a laser diffraction and a light scattering method using a Microtrack MKIIDRA manufactured by Nikkiso Co., Ltd. FIG. 7 shows a comparison between a separator using a regular octagonal ring and a separator using a circular ring. The processing conditions were as follows. Crusher Motor capacity: 15 kw, number of revolutions: 1200 rpm, processing flow rate: 15 l / min Crusher: 230 m inside diameter (D)
m, axial length (L) 86 mm, container capacity 2.7 l Stirring member: inner diameter 220 mm, axial length 70 mm Grinding media material: zirconia, ball diameter: 0.3 mm Treated calcium carbonate 10 kg and water 10 kg calcium carbonate Average particle size: 5.5 μm Under the above processing conditions, the power consumption required to pulverize the processed product to an average particle size of 1 μm was measured for each amount of pulverization media used. FIG. 7 shows the result. From this result, it was found that the separator formed by the polygonal ring had the following advantages as compared with the separator formed by the circular ring. If the power consumption is the same, a small amount of crushed media is sufficient. With the same amount of grinding media, the power consumption is small. In both circular and polygonal rings, the greater the amount of crushed media, the lower the power consumption.However, the rate of decrease in power consumption for an increase in the amount of media is remarkable for polygonal rings compared to circular rings. The greater the amount of media, the greater the difference between the power consumption of the circular ring and the power consumption of the polygon ring. From the above, it was proved that the separator using the polygonal ring can be efficiently pulverized with less pulverizing media.

[0043]

According to the present invention, the following effects can be obtained by the above-described configuration. That is, the processed material is supplied from the supply port into the inner chamber of the grinding container,
When the stirring member is rotated, the processing object is stirred and crushed together with the crushing medium located inside the inner chamber. In this case, the crushing media revolves and rotates along the inner peripheral surface of the separator located at the outer peripheral portion of the inner chamber. In this case, the inner peripheral surface of the separator is formed in a polygonal shape. The revolving direction of the grinding media revolving along the surface constantly changes, and the rotation of the grinding media increases with the change. Therefore, the change in the revolving direction of the grinding media and the increase in the number of revolutions amplify the shearing action on the processed material, and improve the grinding efficiency. Further, since the inner peripheral surface of the separator has a polygonal shape, the pulverizing efficiency is also improved by a shearing action caused by a change in the rotation direction of the processed material itself. By forming the inner peripheral portion of the separator in a polygonal shape in this manner, a synergistic effect is produced, the shearing action acting on the processed material is significantly increased, and this contributes to further improvement of the pulverization efficiency.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a crusher according to the present invention.

FIG. 2 is an enlarged view of a main part of what is shown in FIG.

FIG. 3 is a detailed view of a separator.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a system diagram of a batch processing system constituted by using a crusher according to the present invention.

FIG. 7 is an explanatory diagram comparing the performance of a crusher according to the present invention and a conventional crusher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Crusher 2 ... Crushing container 3 ... Container main body 4 ... Boss 5 ... Bearing 6 ... Lid 7 ... Supply port 8 ... Discharge port 9 ... Separator 10 ... Partition wall 11 ... Ring 12 ... Support shaft 13 ... Spacer 14 ... Opening 15 and 16 ... Ring holder 18 ... Bolt 19 ... Inner chamber 20 ... Outer chamber 21 ... Stirring member 22 and 29 Projections 24, 25 Through-hole 26 Projection 27 Drive shaft 28 Dispersion member 31 Batch processing system 32 Circulation line 33 Service tank 34 Circulation pump

Claims (2)

[Claims] 1. A crushing container, a separator provided in the crushing container, dividing the inside of the crushing container into two chambers, an inner chamber and an outer chamber, and having an opening communicating between the two chambers; A rotatable stirring member, a supply port for supplying the processed material into the inner chamber, and a discharge port for discharging the processed material from the outer chamber, wherein the inner chamber is A crusher formed in a polygonal shape. 2. The separator has an inner peripheral surface formed in a polygonal shape and an outer peripheral surface formed in a circular shape. A plurality of rings are overlapped with each other, and an opening communicating between the inner and outer peripheral surfaces between adjacent rings. The crusher according to claim 1, wherein the crusher is formed.