JP2003181313A - Centrifugal crushing/sizing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a centrifugal crushing/sizing machine capable of being excellent in a crushing ratio and a particle size, and of which the maintenance cost, the whole size and the weight are reduced. <P>SOLUTION: In the centrifugal crushing/sizing machine wherein a charged raw material 21 is discharged from a rotor 6 by the centrifugal force to be crushed and sized by hitting the material against a dead stock part 14 placed in such a way to enclose the rotor 6, cylindrical blocks 16 are vertically installed at intervals between adjacent cylindrical blocks 16 on a shelf 15 forming the dead stock part, and either may be installed in the vicinity of the inner periphery end 17 of the shelf 15 or formed with any of the faces opposite to the rotor 6 in a fixable manner. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention discharges a raw material such as stones thrown from a rotor by centrifugal force, hits it on a columnar block arranged so as to surround the rotor, crushes it, and hits it on a dead stock portion to adjust it. A centrifugal crushing and sizing machine designed to granulate, especially a material with a light mass can be efficiently crushed to improve the grain shape, and the crushing block can have a long life and can be formed into a compact structure. Regarding granulator.

[0002]

2. Description of the Related Art In a conventional centrifugal crushing and sieving machine, due to the difference in the crushing mechanism, a new rotor is smashed by a centrifugal force to the portion where the raw material is already crushed and stocked. There is a dead stock type and an anvil type in which the raw material is crushed by hitting the raw material with centrifugal force against the anvil arranged so as to surround the rotor. There is also an upper and lower two-stage structure having the anvil type in the upper stage and the dead stock type in the lower stage.

[0003]

However, the above-mentioned dead stock type has a problem that the crushing ratio is low because the raw material is only hit into the dead stock part. Further, although the grain shape is good, it is always in a constant state, and there is a problem that adjustment for further improving the grain shape cannot be made. Further, in the anvil type, since the raw material is struck on the anvil, the crushing ratio of the raw material excluding the light weight is not a problem, but the particle shape is not preferable, and there is a problem that the repair cost due to abrasion of the anvil is large. Further, in the case where the anvil type and the dead stock type are arranged in the upper and lower two stages, the total height naturally becomes high, and the raw material for hitting the dead stock part is the one crushed by the anvil.
However, there is a problem that the diameter of the second rotor and the dead stock portion are increased because they have to be dropped into the rotor, and the overall size and weight are increased accordingly.

The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to:
It is an object of the present invention to provide a centrifugal crushing and sizing machine which has a high crushing ratio and a good grain shape, which can reduce repair costs and can reduce the overall size and weight.

[0005]

As means for solving the above-mentioned problems, in the centrifugal crushing and granulating machine according to claim 1 of the present invention, the charged raw materials are discharged from the rotor by centrifugal force to surround the rotor. In a centrifugal crushing and sizing machine that is crushed and sized by hitting the dead stock portion arranged as described above, a columnar block is erected on the shelf for forming the dead stock portion with a space between adjacent blocks. It is characterized by

In the centrifugal crushing and granulating machine according to claim 2, in the centrifugal crushing and granulating machine according to claim 1, the block is erected near an inner peripheral edge of the shelf for forming the dead stock part. Is characterized by.

The centrifugal crushing and granulating machine according to claim 3 is the centrifugal crushing and granulating machine according to claim 1 or 2.
It is characterized in that the block is formed so that it can be fixed to the rotor with its arbitrary surface facing.

According to a fourth aspect of the centrifugal crushing and sieving machine, in the centrifugal pulverizing and sizing machine according to any one of the first to third aspects, the block is formed in a cylindrical shape. Characterize.

According to a fifth aspect of the centrifugal crushing and sieving machine, in the centrifugal crushing and sieving machine according to any one of the first to fourth aspects, an interval between the block and the rotor can be adjusted. It is characterized by being installed.

A centrifugal crushing and sizing machine according to a sixth aspect is the centrifugal crushing and sieving machine according to any one of the first to fifth aspects, wherein at least an intermediate portion of the block in its entire length is present in the block. It is characterized by being formed of hard ceramics.

[0011]

In the centrifugal crushing and sizing machine according to claim 1 of the present invention, when the raw material is discharged from the rotor by centrifugal force,
The columnar block is crushed and then crushed and then crushed to the next block or crushed to the dead stock to adjust the grain shape. Moreover, the one directly hit on the dead stock part is crushed and the grain shape is adjusted. Therefore, according to the first aspect of the present invention, it is possible to efficiently obtain a good quality product by simultaneously crushing and sizing. Even in the dead stock type, the crushing ratio can be improved by the crushing action of the columnar blocks. Since the columnar blocks are erected at intervals, the function of the dead stock portion is not hindered, and the cost can be reduced by minimizing the consumables. Further, since the columnar block for crushing the raw material is integrally arranged in the dead stock portion, it is possible to obtain an effect such that the centrifugal crushing and sizing machine can be formed compactly.

In the centrifugal crushing and granulating machine according to the second aspect of the present invention, since the columnar block is erected near the inner peripheral edge of the shelf for forming the dead stock part, the anvil type in which the anvil is usually arranged on the inner peripheral wall of the casing is used. The columnar block will be placed very close to the rotor. In addition, since the dead stock part is formed in a state of being slanted low toward the inner peripheral edge of the shelf, the columnar block located near the inner peripheral edge of the shelf is not buried in this dead stock part and the front surface of the block is always exposed. And face the rotor. Therefore, claim 2
In the invention described in (1), since the columnar block is arranged close to the rotor, it is possible to crush a light-weight raw material better than the anvil type and improve the crushing ratio. Further, even if the columnar block is arranged in the dead stock portion, the columnar block is not buried by the deposit, and the effect that the raw material can always be satisfactorily crushed can be obtained.

In the centrifugal crushing and sizing machine according to the third aspect of the present invention, since the columnar block is formed so as to be fixed to the rotor with its arbitrary surface facing, the columnar block worn by the crushing of the raw material is worn. When the limit is reached, the non-abraded surface can be redirected to face the rotor and the same column block can be used again from scratch. Therefore,
In the invention according to claim 3, the worn columnar block is redirected so that the surface not worn is opposed to the rotor, and the same columnar block is used again from a new state to prolong the service life. Therefore, it is possible to reduce the cost of consumables.

In the centrifugal crushing and sizing machine according to the fourth aspect, the columnar block is formed in a columnar shape, and the material is easily available. Of the raw material discharged from the rotor, the raw material that collided with the cylindrical block was crushed and then collided with the dead stock portion, and the raw material was sized there, or the one that passed between the cylindrical blocks was directly dead stock portion. The particles are sized by colliding with. Therefore, in the invention described in claim 4, the crushing effect can be improved as compared with the dead stock single type and the particle size adjusting effect can be improved as compared with the anvil single type even though it has a one-stage structure. In addition, it is possible to reduce the amount of powder coating on the product and increase the commercial value as compared with the dead stock alone type.

In the centrifugal crushing and granulating machine according to the fifth aspect of the present invention, since the columnar block is attached so that the space between the columnar block and the rotor can be adjusted, the optimum space is set according to the weight of the mass, the amount of water, the hardness, etc. Can be crushed. Therefore, according to the invention described in claim 5, it is possible to obtain an effect that the distance between the columnar block and the rotor is adjusted according to the characteristics of the raw material, and good crushing can be easily performed.

In the centrifugal crushing and sizing machine according to the sixth aspect of the present invention, since at least the middle portion of the columnar block is made of hard ceramics, that is, fine ceramics formed of pure good components, wear progresses more than the chrome steel block. Can be slowed down. Therefore, in the invention according to the sixth aspect, the progress of wear of the columnar block can be delayed, so that the maintenance inspection period can be extended and the running cost can be reduced.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing the centrifugal crushing and sieving machine of the first embodiment with the drive section omitted, and FIG. 2 is a side view showing the mounted state of the columnar block, in which 1 is a frame and 2 is a A casing fixed to the frame 1, 3 is a lid portion for opening and closing the upper opening portion of the casing 2, and 40 is a duct. Further, 4 is a main shaft vertically arranged at the center of the casing 2, 5 is a shaft supporting portion for projecting and supporting upper and lower ends of the main shaft 4, 6 is a rotor fixed to the upper end of the main shaft 4, and 7 is a main shaft 4. It is a pulley fixed to the lower end. By driving this pulley 7 via a V belt 8 by an electric motor (not shown), the rotor 6 is rotated in one horizontal direction at high speed.

Reference numeral 9 designates a distributor, which is arranged on the inner bottom surface axis of the rotor 6 and also serves as a wear-prevention liner, 10 is an inlet port provided on the ceiling surface, and 11 is an outlet port. Further, 12 is a hopper fixed to the lid portion 3, and 13 is a hopper 1
It is a charging cylinder extending downward from 2 and is inserted into the rotor from the inlet 10. A dead stock portion 14 is formed so as to surround the rotor 6, and is formed at a position facing the discharge port 11 by providing a ring-shaped shelf 15 along the inner peripheral surface of the casing 2. 16
Is a cylindrical block, which is formed at a position close to the inner peripheral edge 17 of the shelf 15, on the circumference of a diameter of 1400 mm in the present embodiment, with a diameter of approximately 150 mm and a height of 400 mm 12 to 1
Six of them are equally arranged and are erected at intervals such that a space portion is appropriately formed between adjacent columnar blocks, but the number is not limited to these values.
The cylindrical block 16 has a through hole 18 in the shaft center of round steel made of chromium steel of a predetermined length, and is detachably fixed with a bolt 20 between a bracket 19 extending from the casing and a shelf 15. There is.

Next, the operation of the centrifugal crushing and sizing machine according to the present embodiment will be described. First, the raw material 21 charged into the hopper 12 is supplied into the rotor 6 via the charging cylinder 13.
The rotor 6 is rotating at a high speed, and the raw material 21 sorted by the distributor 9 is discharged through the discharge port 1 by centrifugal force.
It is released from 1 to the dead stock part 14. The dead stock portion 14 has 12 to 1 around the rotor 6.
Since the six columnar blocks 16 are erected at equal intervals, the raw material that collides with the columnar blocks 16 is crushed, and after the collision, the raw materials are crushed and scattered in all directions, so that the dead stock portion 14 is directly crushed. Some of them collide and are sized, and some of them collide with another cylindrical block 16 again to be further crushed. Further, there is also a case where the particles are sized by directly hitting the dead stock portion 14 from the beginning without hitting the cylindrical block 16. In this way, the large raw material is gradually finely crushed and sized in the dead stock portion.

In this case, since the cylindrical block 16 is erected near the inner peripheral edge 17 of the shelf 15 forming the dead stock portion 14, it is more cylindrical than the anvil type in which the anvil is arranged on the inner peripheral wall of the conventional casing. Block 16
Is arranged very close to the rotor 6, and the raw material having a light mass is in a state of colliding before the energy due to the centrifugal force is reduced. Further, since the dead stock portion 14 is formed in a state of being slanted low toward the inner peripheral edge 17 side of the shelf 15, the columnar block 16 arranged near the inner peripheral edge 17 of the shelf 15 is formed.
Is not buried in the dead stock portion 14, and the front surface of the block can be always exposed to face the rotor 6.
Further, since the cylindrical block 16 is formed so as to be fixed so that any surface thereof faces the rotor 6, the cylindrical block 16 that is worn due to the crushing of the raw material will reach the limit of wear when it reaches the limit of wear. , By loosening the bolts 20 and redirecting the non-worn surface to face the rotor,
The same cylindrical block can be used again as a new state.

As described above, the centrifugal crushing and sizing machine of the present embodiment has the above-mentioned configuration, and therefore the effects listed below can be obtained. 1. It is possible to perform the two operations of crushing the raw material in the cylindrical block 16 and adjusting the particle size in the dead stock section 14 at the same time. 2. Since the cylindrical block 16 is arranged in the dead stock portion 14, the entire structure can be made compact. 3. Since the cylindrical block 16 is arranged close to the rotor 6, it is possible to crush even a raw material having a small mass better than the anvil type and improve the crushing ratio. 4. Even if the cylindrical block 16 is arranged in the dead stock portion 14, it is not buried by deposits, and the raw material can always be satisfactorily crushed. 5. The worn columnar block 16 can be redirected so that the surface not worn is opposed to the rotor 6, and the same columnar block can be used again from a new state to prolong the service life and reduce the cost of consumables. it can. 6. It is more compact than the anvil type and dead stock type, which has a two-tiered structure, and has a higher crushing effect than the dead stock type and a sizing effect than the anvil type. In addition, it is possible to reduce the amount of powder coating on the product and increase the commercial value as compared with the dead stock alone type.

Next, a second embodiment will be described. still,
In the present embodiment, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the detailed description thereof will be omitted. FIG. 3 shows a columnar block 25 according to the second embodiment, which is characterized in that the middle portion of the block 25 is formed of a fine ceramic cylindrical body 26 with respect to the entire length of the block, that is, It has an optimal structure for sand formation. The cylindrical body 26 is made of, for example, hard fine ceramics such as alumina-based or silicon nitride-based, and blocks 27 made of steel and having the same diameter are arranged on the upper and lower sides of the cylindrical body 26. It is integrated with. The tubular body 26 portion has great durability against abrasion. Therefore, in the present embodiment, it is suitable that the raw material to be charged is smaller than the large one, and the progress of wear of the cylindrical block 25 can be delayed when a large amount of sand having a small particle size is produced. This has the effect of extending the maintenance period and reducing the running cost.

Next, a third embodiment will be described. still,
Also in this embodiment, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the detailed description thereof will be omitted. FIG. 4 shows a shelf 29 for forming a dead stock portion in the third embodiment, and this shelf 29 is characterized in that the mounting position of the cylindrical block can be changed with respect to the rotor. The shelf 29 is a standard position mounting bolt hole 3 that is a standard distance 33 from the outlet of the rotor (or from the center of the rotor) to the cylindrical block.
0, and before and after that, adjustment distance 34 from standard distance 33
Bolt holes 31 for approach mounting that are made to be close to each other,
It has a separating / attaching bolt hole 32 which is set to be away from the standard distance 33 by an adjusting distance 35. Therefore, in the present embodiment, the optimum bolt hole is selected according to the characteristics of the raw material such as the lightness and weight of the mass, the amount of water, the hardness, etc., and the interval between the cylindrical block and the rotor is adjusted to satisfy various conditions. It is possible to obtain an effect that good crushing and sizing of the raw material can be performed by simple adjustment.

Next, a fourth embodiment will be described. still,
Also in this embodiment, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the detailed description thereof will be omitted. FIG. 5 shows a shelf 36 for forming a dead stock portion in the fourth embodiment, and is characterized in that the shelf 36 is formed so that the cylindrical block 37 can be firmly stopped from rotation. The columnar block 37 is provided with notches 38 at both ends for forming a width across flats.
On the other hand, the shelf 36 has a pair of key members 39 fixed on both sides of the mounting bolt hole 30 with a space slightly wider than the width across flats. When the columnar block 37 is attached or is used upside down, the notch 38 can be firmly fixed only by inserting it between the key members 39 and tightening the bolts. It should be noted that the reversal use can be reversal around the axis, or upside down.

Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the invention. However, it is included in the present invention. For example, the columnar block may have a polygonal shape. The number of columnar blocks to be installed is arbitrary, and the diameter, height and arrangement dimension thereof can also be arbitrarily set. Although the dead stock part was explained as a single stage, it is composed of two stages, upper and lower, and the crushing raw material falling from the upper stage is supplied to the second rotor, and the second crushing and sizing is performed in the lower dead stock part. May be performed.

[Brief description of drawings]

FIG. 1 is a sectional view showing a centrifugal crushing granulator according to a first embodiment of the present invention.

FIG. 2 is a side view showing a mounted state of the columnar block according to the first embodiment.

FIG. 3 is a sectional view showing a columnar block according to a second embodiment.

FIG. 4 is a plan view showing a part of a shelf for forming a dead stock portion according to a third embodiment.

FIG. 5 is a plan view showing a part of a shelf for forming a dead stock portion and a cylindrical block according to a fourth embodiment.

[Explanation of symbols]

6 rotor 11 Rotor outlet 14 Dead Stock Department 15 Shelf for forming dead stock 16 cylindrical blocks 21 Raw material 25 cylindrical block 26 Cylindrical body of fine ceramics 29 Shelf for forming dead stock 30 Bolt holes for mounting the cylindrical block in the standard position 31 Bolt holes for mounting the cylindrical block in the approaching position 32 Bolt hole for mounting the column block in the separated position 37 Cylindrical block

Claims (6)

[Claims] 1. A centrifugal crushing and sizing machine in which a charged raw material is discharged from a rotor by a centrifugal force and is crushed and sized by hitting a dead stock portion arranged so as to surround the rotor. The centrifugal crushing and sizing machine is characterized in that a columnar block is erected on a shelf for forming a stock portion with a space between the columnar block and an adjacent columnar block. 2. The centrifugal crushing and sizing machine according to claim 1, wherein the block is erected near an inner peripheral edge of the shelf for forming the dead stock portion. 3. The centrifugal crushing and sizing machine according to claim 1, wherein the block is formed so as to be fixed to the rotor with an arbitrary surface facing the rotor. 4. The centrifugal crushing and sizing machine according to claim 1, wherein the block is formed in a columnar shape. 5. The centrifugal crushing granulator according to any one of claims 1 to 4, wherein the block is attached so that a distance between the block and the rotor can be adjusted. 6. The centrifugal crushing and sizing method according to any one of claims 1 to 5, wherein at least an intermediate portion of the block with respect to the entire length of the block is formed of hard ceramics. Machine.