JPH10118511A - Pulverizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heighten pulverizing efficiency and also to deal with small diameter media. SOLUTION: A media separator 15 is constituted of annular ring-shaped plates 16 installed in multiple stages in a runoff port and annular distance pieces 17 interposed between adjacent ring-shaped plates 16, 16, and between the ring-shaped plates 16, 16, clearances 18 passing through the media separator 15 in the diameter direction are formed. Since the thickness of the distance piece 17 becomes the clearance 18, by changing the thickness of the distance piece 17 only, the size of the clearance 18 is changed to sufficiently deal with small diameter media. Since the pulverizing media that are about to act on the media separator 15 are sent flying toward the inner surface of a pulverizing tank 2 by an auxiliary agitating member 14, the media separator 15 is prevented from being clogged by the pulverizing media, allowing the pulverizing efficiency to be heightened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulverizer, and more particularly to a wet media stirring type pulverizer used for pulverizing raw materials in the field of producing pigments, ceramics, magnetic materials, and the like.

[0002]

2. Description of the Related Art Conventionally, in the field of manufacturing pigments, ceramics, magnetic materials and the like, since it is necessary to make the raw material into fine particles on the order of microns or submicrons, a wet media stirring type pulverizer is used. Raw materials located in the liquid are ground using a grinding media (such as steel balls)
Then, the mixture is stirred to be pulverized into fine particles, which are uniformly dispersed in the liquid.

[0003] As a pulverizer used for such a pulverizing operation, for example, a "dispersion apparatus" described in Japanese Patent Publication No. Sho 62-16687 is already known.

In this dispersing apparatus, a basket having small holes on the bottom and side surfaces is provided in a container, and a stirring shaft is rotatably provided in a central portion of the container in a state of penetrating the basket. A blade for stirring the dispersion medium is provided in a portion located in the body, and a blade for mill base flow is provided in a portion located below the basket of the stirring shaft.

When the mill base is placed in the container and the stirring shaft is rotated, the blade for stirring the dispersion medium and the blade for flowing the mill base rotate integrally with the stirring shaft, and the dispersion medium and the mill base are combined together in the basket. The mixture is stirred, and the solid particles in the mill base are ground and dispersed in the mill base. Then, the mill base stirred in the cage is separated from the dispersion medium, flows out from the bottom of the cage, moves upward along the inner wall of the container, and flows again into the cage from the top of the cage.
Then, by circulating the mill base in the container in this manner, the solid particles in the mill base are gradually pulverized finely, dispersed in the mill base, and formed into a colloidal suspension.

However, in the dispersing apparatus having the above-described structure, when the dispersing medium and the mill base are stirred together in the cage, the dispersing medium collides with the inner surface of the cage and closes the small holes. There are cases. For this reason, the outflow of the solid particles and the mill base is hindered, and the pulverization efficiency is greatly reduced.

On the other hand, an example of a pulverizer that solves the above-mentioned problem of clogging is described in Japanese Utility Model Laid-Open No. 4-004444. This pulverizer (wet pulverizer) is provided with a rotatable stirring shaft having a stirring rod on a peripheral surface in a pulverizing chamber, and an arc-shaped plate member at a lower end portion of the stirring shaft, and a pulverized material outlet in the pulverizing chamber. And a separation sieve for the pulverizing medium is provided at a portion corresponding to the above, and a lattice-like mesh is formed between the annular sieve member and the spacing member of the separation sieve.

[0008] When the stirring shaft is rotated, the stirring rod rotates integrally with the stirring shaft, and the slurry and the grinding medium are stirred together in the grinding chamber, and the material to be ground in the slurry is ground and dispersed in the slurry. Is done. Then, the slurry stirred in the crushing chamber is separated from the crushing medium by the sieves of the separation sieve and flows out of the crushing chamber. Since the grinding medium is greatly affected by the disturbing action of the arc-shaped plate member, it is possible to prevent the grinding medium from being clogged in the separation sieve.

However, since the arc-shaped plate member can cover only a part of the periphery of the separation sieve, it is not possible to completely prevent the grinding medium from directly acting on the sieve.
For this reason, a part of the pulverizing medium may collide with the sieves of the separation sieve and may close the sieves. Maintenance such as removing and cleaning the separation sieve during the pulverization work is required, and the pulverization efficiency is greatly increased. Will decrease.

The present invention solves the above-mentioned problems of the prior art, and completely prevents the media separator from being clogged by the pulverized media during the pulverization operation. It is an object of the present invention to provide a crusher capable of greatly improving the crushing efficiency.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention can hold a pulverizing medium inside, has an inflow port for a processed material at an upper portion, and flows a processed material at a lower portion. A vertical cylindrical crushing tank having an outlet, a stirring shaft rotatably provided in a state penetrating the center of the crushing tank, and a main stirring member provided at a portion of the stirring shaft located in the crushing tank. A media separator provided at an outlet of the crushing tank to separate crushed media and a processed material; and a media separator provided below the crushed tank and forming a flow of a processed material from an inlet to an outlet in the crushing tank. In the crusher provided with a pump member to perform, the media separator, a ring-shaped plate provided in multiple stages at the outlet of the crushing tank, provided between the adjacent ring-shaped plate, and between the ring-shaped plate It is obtained by employing the means arranged in the distance piece to form a gap through the media separator and out. In addition, a bottom plate is attached to the outlet of the crushing tank, and rod-shaped support shafts are installed at a plurality of concentric circles centered on the center of the bottom plate, and an annular ring-shaped plate is provided on the outer peripheral side of the support shaft. Means of mounting in multiple stages, mounting annular distance pieces on each support shaft so as to be interposed between adjacent ring-shaped plates, and forming a gap between adjacent ring-shaped plates to penetrate inside and outside the media separator It has been adopted. Further, an auxiliary stirring member surrounding the entirety of the media separator is provided in a portion of the stirring shaft below the main stirring member located in the grinding tank, and the auxiliary stirring member can be rotated integrally with the stirring shaft. That is, the above-mentioned means are adopted.

[0012]

According to the present invention, by employing the above-described means, when the crushing tank is positioned in the processing tank and the stirring shaft is rotated, the pump member operates to move the crushing tank from the inlet to the outlet. A flow of the processed material is generated, and the processed material in the processing tank flows into the grinding tank from the inflow port. Then, the processed material that has flowed into the grinding tank is stirred together with the grinding media by the rotation of the main stirring member, is ground and formed into fine particles, and is dispersed in the liquid. Then, the processed material formed into fine particles acts on the media separator located at the outlet of the grinding tank, is separated from the grinding media, and goes out of the grinding chamber through the gap between the ring-shaped plates of the media separator. leak. Then, the processed material flowing out of the grinding chamber rises along the inner surface of the processing tank, and flows into the grinding tank again from the inlet. By repeating such a process, the processed product is formed to have a predetermined particle size. When the auxiliary stirring member rotates integrally with the stirring shaft, the processed material to be retained at the bottom of the crushing tank is stirred, and the crushed media to act on the media separator is splashed.

[0013]

Embodiments of the present invention shown in the drawings will be described below. 1 and 2 show an embodiment of a crusher according to the present invention.
Is a longitudinal sectional view showing the whole, and FIG. 2 is a partially enlarged view of the one shown in FIG.

That is, the crusher 1 shown in this embodiment
Is a vertical cylindrical grinding tank 2 having a processed material inlet 3 at the upper end and a processed material outlet 4 at the lower end, and rotating in a state where it penetrates the center of the grinding tank 2. A stirrer shaft 12 provided so as to be able to be provided, a main stirrer member 13 attached to a portion of the stirrer shaft 12 located in the pulverization tank 2 in a plurality of stages, a media separator 15 provided at an outlet 4 of the pulverization tank 2 2 and a pump member 21 provided below.

At the upper end opening of the crushing tank 2, a disk-shaped top plate 5 having a hole 5a vertically penetrating at the center is mounted, and the processed material 27 is crushed by the holes 5a of the top plate 5. An inlet 3 leading into the interior 2 is formed.

The crushing tank 2 has a double-walled structure including an inner wall 6 and an outer wall 7, and a cylindrical jacket 8 hermetically sealed between the two walls 6, 7 is formed. A cooling or heating medium for cooling or heating the inside 2 is guided.

A disc-shaped bottom plate 9 having a hole 9a vertically penetrating at the center thereof is attached to the lower end opening of the crushing tank 2, and a bottom surface of the hole 9a of the bottom plate 9 is provided on the upper surface side. On a concentric circle centered on the center of the hole 9a, a rod-shaped support shaft 10 which is one of the components of the media separator 15 is provided.
Are integrally erected at predetermined intervals. Support shaft 10
May be formed integrally with the bottom plate 9, or may be formed separately and attached integrally to the bottom plate 9 with bolts or the like.

A lower end of a rod-shaped support 11 is integrally attached to at least one location on the outer peripheral surface of the pulverizing tank 2. The upper end of the support 11 is attached to a frame (not shown), so that the pulverizing tank 2 becomes a processing tank 26. Is held at a predetermined position in the inside.

A flow path 11a for guiding a cooling or heating medium into the jacket 8 is formed inside the support 11, and a cooling / heating medium supply source (not shown) cools the inside of the jacket 8 through the flow path 11a. Alternatively, a heating medium is supplied.

The stirring shaft 12 is rotatably provided at the center of the crushing tank 2 with the axis of the crushing tank 2 aligned with the axis. The upper end of the stirring shaft 12 is connected to a driving source (not shown) located above the pulverizing tank 2 through the hole 5 a at the center of the top plate 5.
The lower end of the bottom plate 9 penetrates through the hole 9a at the center of the bottom plate 9 and protrudes below the crushing tank 2. An impeller 22, which is one of the components of the pump member 21, is attached to the protruding portion. I have.

A rod-shaped or blade-shaped main stirring member 13 is radially attached to a portion of the stirring shaft 12 located in the crushing tank 2 in four stages. The number of the main stirring members 13 is not limited to four, but may be one, two, three, or five or more.

An auxiliary stirring member 14 is attached to a portion of the stirring shaft 12 below the main stirring member 13 located in the crushing tank 2. The auxiliary stirrer 14 has a cylindrical shape whose upper end is closed. The auxiliary stirrer 14 surrounds the entire media separator 15 at a predetermined interval.

In the center of the upper surface of the auxiliary stirring member 14, a hole 14a for attaching the auxiliary stirring member 14 to the stirring shaft 12 is provided.
And a through hole 14b penetrating the hole 14a in a vertical direction at a plurality of locations around the periphery of the hole 14a, and a process positioned above the auxiliary stirring member 14 through the through hole 14b. An object is guided to the inner surface side of the auxiliary stirring member 14.

The side surface of the auxiliary stirring member 14 is tapered and dimensioned so that a slight gap is formed between the lower end of the side surface and the bottom surface of the crushing tank 2.
Through-holes 1 penetrating horizontally at multiple locations on the side
4c is formed, and the processing object located on the outer peripheral side of the auxiliary stirring member 14 is guided to the inner surface side of the auxiliary stirring member 14 through the through hole 14c.

The media separator 15 is used for the grinding tank 2
A plurality of support shafts 10 erected on the upper surface side of the bottom plate 9 of the outflow port 4, a plurality of annular ring-shaped plates 16 whose inner peripheral side is fitted to the outer peripheral side of the support shaft 10, It comprises a plurality of annular distance pieces 17 mounted on the shaft 10, and a disk-shaped upper plate 19 attached to the upper portion of the support shaft 10 and having a hole 19 a penetrating vertically in the center. I have.

The distance piece 17 is mounted on each support shaft 10 so as to be interposed between adjacent ring-shaped plates 16. By alternately mounting the distance pieces 17 and the ring-shaped plates 16 in this manner, a gap 18 is formed between the adjacent ring-shaped plates 16, which penetrates the media separator 15 in the radial direction. I have. The uppermost distance piece 17 is interposed between the upper plate 19 and the uppermost ring-shaped plate 16, and the lowermost distance piece 17 is interposed between the lowermost ring-shaped plate 16 and the bottom plate 9. The distance pieces 17, 17 also allow the lowermost ring-shaped plate 1 to move between the upper plate 19 and the uppermost ring-shaped plate 16.
Gaps 18, 18 are formed between the base plate 6 and the bottom plate 9 so as to penetrate the media separator 15 in the radial direction.

The gap 18 of the media separator 15 is preferably not more than 1/3 of the diameter of the pulverized media used. For example, when using a grinding media of 1 mm or less, the gap 18 needs to be 0.3 to 0.4 mm or less.
In this embodiment, since the thickness of the distance piece 17 is the size of the gap 18 as it is, the distance piece 17 can sufficiently cope with a small-diameter crushed medium.

A bush 20 having a part of the outer peripheral surface formed into a tapered surface is attached to a portion of the stirring shaft 12 that penetrates the center of the media separator 15. The tapered surface of the bush 20 allows the media separator 15
The processing object 27 guided to the inner peripheral side of the pump member 21 is smoothly guided toward the pump member 21.

At the lower end of the stirring shaft 12, an impeller 22, which is one of the components of the pump member 21, is mounted.
The impeller 22 is composed of a substantially cylindrical boss 23 fitted to the lower end of the stirring shaft 12 and blades 24 provided radially on the outer peripheral surface of the boss 23 and inclined at a predetermined angle in the rotation direction. It is configured. The impeller 22 is provided in a truncated conical cylindrical case 25 integrally attached to the lower end of the crushing tank 2 so as to form a predetermined gap with the inner peripheral surface of the case 25. The impeller 22 and the case 25 constitute a pump member 21 that forms a flow of the processed material from the inlet 3 to the outlet 4 in the pulverizing tank 2.

The crushing tank 2 is mounted in a cylindrical processing tank 26 having an open upper end. When the crushing tank 2 is mounted in the processing tank 26, the upper portion of the crushing tank 2 is immersed. A small amount of the processed material 27 is accommodated. Reference numeral 28 denotes a rectifying plate for rectifying the flow of the processing object in the processing tank 26.

The pulverizing tank 2 may be manually mounted in the processing tank 26 by an operator. However, the pulverizing tank 2 is mounted on an elevating device (not shown), and the pulverizing tank 2 is automatically operated by the operation of the elevating device. It may be installed in the tank 26.

Next, the operation of the above-described device will be described. First, when the crushing tank 2 is mounted in the processing tank 26 filled with a predetermined amount of the processing object 27 and the drive shaft (not shown) is operated to rotate the stirring shaft 12, the main stirring member 13 is integrated with the stirring shaft 12, Auxiliary stirring member 14 and impeller 2
2 rotates, and a flow of the processed material 27 from the inflow port 3 to the outflow port 4 is generated in the pulverization tank 2, and the flow of the processed material 27 located above the pulverization tank 2 from the inflow port 3 to the pulverization tank 2 Flows into.

The processed material 27 that has flowed into the crushing tank 2 by the rotation of the main stirring member 13 is stirred together with crushing media 29 (such as steel balls) stored in the crushing tank 2 in advance, and gradually becomes finer. And the through hole 14b on the upper surface of the auxiliary stirring member 14 or the through hole 14 on the side surface.
The fluid flows into the inner side of the auxiliary stirring member 14 via the line c. In this case, the grinding media 29 is splashed toward the inner surface of the grinding tank 2 by the rotation of the auxiliary stirring member 14, and the inflow of the auxiliary stirring member 14 to the inner surface side is prevented.

Then, the processed material 27 flowing into the inner surface of the auxiliary stirring member 14 passes through the gap 18 formed between the ring-shaped plates 16 adjacent to the media separator 15 and passes through the inner surface of the media separator 15. And flows out of the pulverizing tank 2 from the outlet 4 through the space between the blades 24 of the impeller 22.

The processed material 27 flowing out of the grinding tank 2 rises from the bottom of the processing tank 26 along the inner surface of the processing tank 26, and flows from above the grinding tank 2 through the inflow port 3 into the grinding tank 2. Again flows into. By repeating such a process inside the processing tank 26, the processed material 27 is formed to have a predetermined particle size.

In the pulverizer according to this embodiment constructed as described above, the ring-shaped plates 16, 16 are provided in multiple stages, and the distance pieces 17 are interposed between the adjacent ring-shaped plates 16, 16. And the adjacent ring-shaped plate 1
Since the gap 18 penetrating the media separator 15 in the radial direction is formed between 6 and 16, the thickness of the distance piece 17 becomes the size of the gap 18 as it is. Therefore, only by changing the thickness of the distance piece 17 can the gap 18 be changed.
Can be changed to an arbitrary value and the distance piece 17 can be easily processed, so that it is possible to sufficiently cope with a small-diameter crushed medium.

Further, the grinding media 29 that is going to act on the media separator 15 is repelled by the rotation of the auxiliary stirring member 14 toward the inner surface of the grinding tank 2.
5 does not directly act on the gap 18 to cause clogging, and the crushing efficiency is greatly improved.

Further, the processed material 27 located at the bottom of the crushing tank 2 is stirred by the rotation of the auxiliary stirring member 14, so that the processed material 27 and the crushing medium 29 stay at the bottom of the crushing tank 2 and collect. Is not formed, the processed material 27 can be circulated in the processing tank 26 satisfactorily, and the processed material 27 can be pulverized to a uniform particle size and dispersed.

[0039]

According to the present invention, the following effects can be obtained by the above-mentioned structure. That is,
Since the distance piece is interposed between the adjacent ring-shaped plates to form a gap that penetrates the inside and outside of the media separator between the ring-shaped plates, the thickness of the distance piece can be set to the dimension of the gap as it is. . Therefore, the gap can be changed to any size just by changing the thickness of the distance piece,
The size of the gap can be easily set. In addition, since the distance piece is formed in an annular shape, the processing of the distance piece becomes easy, so that the distance piece can be easily processed to a dimension corresponding to the size even when a small-diameter crushed media is used. ,
It is possible to sufficiently cope with small-diameter grinding media. Further, by providing the auxiliary stirring member so as to surround the whole of the media separator, the pulverizing media which is to act directly on the media separator can be splashed toward the inner surface of the pulverizing tank. Therefore, the pulverized media acts directly on the media separator, and the gap between the media separators is not clogged by the pulverized media. Moreover, since the processed material located at the bottom of the grinding tank can be stirred by the auxiliary stirring member, the processed material and the grinding media do not stay at the bottom of the grinding tank to form lumps. In this case, the processed material can be circulated satisfactorily, the pulverization efficiency can be greatly increased, and the processed material can be formed into a uniform particle size and dispersed.

[Brief description of the drawings]

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

FIG. 2 is a partially enlarged view of what is shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pulverizer 2 ... Pulverization tank 3 ... Inflow port 4 ... Outflow port 5 ... Top plate 5a, 9a, 14a, 19a ... Hole 6 ... Inner wall 7 ... Outer wall 8 ... Jacket 9 ... Bottom plate 10 Support shaft 11 Support 11a Flow passage 12 Stirring shaft 13 Main stirring member 14 Auxiliary stirring member 14b, 14c Through hole 15 Media separator 16 Ring plate 17 Distance piece 18 Gap 19 Upper plate 20 Bush 21 Pump member 22 Impeller 23 Boss 24 Blade 25 Case 26 Treatment tank 27 Treatment object 28 …… Stabilizer 29 …… Pulverized media

Claims (3)

[Claims] 1. A vertical cylindrical pulverizing tank having a processing material inlet at an upper portion and a processing material outlet at a lower portion, and a central portion of the pulverizing tank. A stirring shaft rotatably provided in a state penetrating the
A main stirring member provided at a portion of the stirring shaft located in the crushing tank, and a media separator provided at an outlet of the crushing tank, for separating crushing media and a processed product,
A pulverizer provided below the pulverizing tank and having a pump member that forms a flow of the processed material from the inlet to the outflow port in the pulverizing tank. A crusher comprising: a ring-shaped plate provided; and a distance piece provided between adjacent ring-shaped plates and forming a gap between the ring-shaped plates to penetrate inside and outside of the media separator. 2. A bottom plate is attached to an outlet of the crushing tank, and rod-shaped support shafts are installed at a plurality of concentric circles around the center of the bottom plate, and an annular ring is provided on an outer peripheral side of the support shaft. At the same time, the annular plates are attached to each support shaft so as to be interposed between adjacent ring-shaped plates, and a gap is formed between adjacent ring-shaped plates to penetrate inside and outside the media separator. The crusher according to claim 1, wherein 3. An auxiliary stirring member surrounding the whole of the media separator is provided at a portion of the stirring shaft below the main stirring member located in the grinding tank, and the auxiliary stirring member is integrated with the stirring shaft. The crusher according to claim 1 or 2, wherein the crusher is rotatable.