JPH07204527A - Vertical crusher - Google Patents

Abstract

PURPOSE:To improve a crushing efficiency of a vertical crusher and save the manpower for a device such as a classifying machine connected to the vertical crusher by incorporating a mechanism for classifying fines in a starting material before crushing. CONSTITUTION:In the vertical crusher having a structure in which a starting material charged by a rotating rotor 5 is flown out in a horizontal direction and the starting material is made to collide with a colliding plate 7 fitted at an inside wall surface side of a casing 1 surrounding the rotor 5 to be crushed, a lower part of the casing 1 surrounding the rotor 5 is formed to a double structure to form an inner cylindrical part 8 and an outer cylindrical part 9. A screening air flow A crossing a flight direction B of the starting material flown out by the rotor 5 is allowed to flow in the inner cylindrical part 8, fines in the starting material are transported to the inner cylindrical part 8 by the screening air flow A, and a crushed matter after being crushed falls in the outer cylindrical part 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical crusher, and more particularly to a vertical crusher having a fine particle separation mechanism built therein.

[0002]

2. Description of the Related Art Conventionally, a vertical crusher has been used for the purpose of coarsely crushing aggregate for concrete. As shown in FIG. 3, such a vertical crusher includes a casing 101 having a substantially cylindrical shape, a raw material feeding chute 102 provided in a state of penetrating near the center of a top plate 101a of the casing 101, and the raw material feeding chute. The casing 101 is coaxial with the above-mentioned cylindrical casing 101 in which the raw material charged from 102 is blown out by its centrifugal force.
A rotor 103 disposed therein, a drive motor 104 for rotating the rotor 103, a collision plate 105 mounted on the inner peripheral wall surface of the casing 101 against which the raw material blown by the rotor 103 collides, and the collision plate 105. It mainly comprises a crushed material discharge port 106 formed in the lower part of the casing 101 for discharging the crushed material crushed by colliding with.

However, the above-mentioned conventional vertical crusher is not a crusher having a built-in mechanism for classifying the supplied raw material into coarse particles and fine particles before crushing it. Fine particles in the raw material that do not need to be crushed also collide with the collision plate 105 to perform over-pulverization, and fine particles existing around the coarse particles to be crushed are crushed when the coarse particles collide with the collision plate 105. There was also a case where it played the role of a cushion material, and it was a crusher with poor crushing efficiency.

Further, since the above-mentioned conventional vertical crusher does not have a built-in mechanism for classifying the crushed material after crushing into coarse particles and fine particles, the crushed material discharged from the vertical crusher is discharged. Exit 1
It is necessary to classify the crushed material discharged from 06 with a wide particle size distribution into coarse particles and fine particles by a classifier such as a vibrating screen provided separately, and the classifier installed is a vertical grinder. Since it was necessary to treat all the crushed materials, it was necessary to install a classifier with high processing capacity.

The present invention has been made in view of the problems that the above-described conventional vertical crusher has, and its object is to obtain fine particles in the raw material before crushing and / or crushed materials after crushing. A mechanism for separating the fine particles inside is built into the vertical crusher to improve the crushing efficiency of the vertical crusher and to save labor in equipment such as a classifier connected to the vertical crusher. It is in.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention flies a raw material introduced by a rotating rotor in a horizontal direction and mounts it on an inner wall surface side of a casing surrounding the rotor. In a vertical crusher having a structure for crushing raw materials by colliding with a raw material, a lower part of a casing surrounding the rotor is formed into a double structure to form an inner cylinder part and an outer cylinder part, and the inner cylinder part and the outer cylinder part. A selective air flow that intersects the flight direction of the raw material blown by the rotor into either one of the inner and outer parts, and the fine air component in the raw material or the crushed material is separated by either of the inner cylindrical portion and the outer cylindrical portion by the selective air flow. The crushed material is conveyed to one of the inner cylinders and the outer cylinder, and the crushed material after crushing falls into the other.

[0007]

According to the above vertical crusher according to the present invention,
Since the sorting airflow that intersects the flight direction of the raw material blown by the rotor is formed in the vertical crusher, the viscous force of the sorting airflow and the moving direction of the raw material before crushing or the crushed material after crushing are maintained. Classification is carried out from the balance with the inertial force to be attempted, and the fine particles in the raw material or the fine particles in the crushed material have a small mass and weak inertial force, so the viscous force of the sorting air flow prevails and they are conveyed to the sorting air flow. Separated from coarse particles.

Therefore, the fine particles in the raw material are prevented from colliding with the collision plate to avoid excessive pulverization, and only the coarse particles collide with the collision plate to be pulverized, so that the vertical pulverizer having high pulverization efficiency is obtained. Becomes

Further, in the above vertical crusher according to the present invention, the lower portion of the casing surrounding the rotor has a double structure to form an inner tubular portion and an outer tubular portion, and one of the tubular portions has the above-mentioned structure. The crushed material after crushing was made to fall into the other cylinder part by allowing the sorting airflow carrying the fine particles to flow in, so that the crushed materials discharged from the vertical crusher have coarse particles and fine particles. It is discharged after being separated to some extent.

Therefore, the fine particles can be directly used as the product, and the coarse particles can be re-introduced into the crusher without connecting the classifier to the vertical crusher, and the classifier can be installed. Even in the case of doing so, the processing capacity will be sufficient with a small classifier.

[0011]

The present invention will be described in detail below with reference to the examples of the present invention.

First, FIG. 1 is a conceptual sectional view showing a first embodiment of a vertical crusher according to the present invention.
Is a substantially cylindrical casing, and 2 is a substantially cylindrical partition plate for forming the lower portion of the casing 1 into a double structure.

The ceiling plate 1a of the casing 1 is provided with a raw material charging chute 3 penetrating through the center of the ceiling plate 1a and forming a sorting air flow A described later in the casing 1. The annular nozzle part 4a of the gas inflow conduit 4 is connected.

In the casing 1, a rotor 5 which blows the raw material charged from the raw material charging chute 3 around the same by centrifugal force is arranged coaxially with the casing 1, and the rotor 5 is rotated below the rotor 5. A drive motor 6 for driving is installed.

Further, the inner peripheral wall surface 1b of the casing 1 is provided with a collision plate 7 against which the raw material blown by the rotor 5 collides.

A movable plate 10 for changing the separation diameter is installed on the upper end 2a of the partition plate 2 which defines an inner cylinder portion 8 and an outer cylinder portion 9 below the casing 1. Board 2
Is located below the annular nozzle portion 4a of the gas inflow conduit 4.
The gas jetted into the casing 1 intersects with the flight direction B of the raw material blown by the rotor 5 in the casing 1 and flows into the inner tubular portion 8 through the sorting airflow A.
The annular inlet opening 11a of the gas outflow conduit 11 is formed so as to form

Further, the partition plate 2 is used to form the casing 1
The inner cylinder portion 8 and the outer cylinder portion 9 defined in the lower part of
Both are squeezed in the lower part, and the outlets 1 are placed at the lowest ends.
2 and 13 are formed.

The apparatus of the first embodiment of the vertical crusher according to the present invention constructed as described above is operated as follows.

First, the rotor 5 for applying a centrifugal force to the raw material to be crushed and the blower (not shown) for forming the sorting air flow A in the casing 1 are rotated.

Next, when the sorting air flow A formed in the casing 1 becomes stable, the material W to be crushed is charged into the casing 1 from the material charging chute 3.

The raw material W to be crushed is given a centrifugal force to fly to the periphery by the rotation of the rotor 5 and flies in the horizontal direction. However, a sorting air flow A intersecting the flight direction B of the raw material enters the casing 1. Since it is formed, classification is performed in the course of the flight based on the balance between the viscous force of the selected air flow A and the inertial force of the raw material for maintaining the flight direction B.

At this time, since the fine particles in the raw material have a small mass, the viscous force of the sorting air flow A is predominant, and the fine particles in the raw material are conveyed to the sorting air flow A and take the path shown by the broken line in the figure, It is discharged from the discharge port 12 formed at the lower end. On the other hand, the coarse particles in the raw material are crushed by the inertial force given by the rotor for maintaining the flight direction B prevailing and continuing the horizontal flight shown by the solid line in the figure and colliding with the collision plate 7 thereafter. , Falls to the outer cylinder portion 9 existing below, and is discharged from a discharge port 13 formed at the lower end thereof.

Therefore, in the above-described apparatus of the first embodiment of the present invention, the fine particles in the raw material are prevented from colliding with the collision plate 7 to avoid excessive pulverization, and only the coarse particles are collided with the collision plate 7.
Since it collides with and is crushed, it becomes a vertical crusher with high crushing efficiency.

Next, a second embodiment of the airflow classifier according to the present invention will be described with reference to FIG. Such an embodiment is configured so that the sorting air flow formed in the casing intersects with the flight direction of the raw material blown by the rotor and also with the falling direction of the crushed material crushed by colliding with the collision plate. It is a device that enables separation of finer particles.

In FIG. 2, reference numeral 51 designates a casing having a substantially cylindrical shape in which a portion near the center thereof is slightly projected, and 52 designates the casing 51.
This is a substantially cylindrical partition plate for forming a double structure from the protruding portion to the lower portion thereof.

On the ceiling plate 51a of the casing 51,
A raw material feeding chute 53 penetrating through the center of the ceiling plate 51a is provided, and an annular nozzle portion 54a of a gas inflow conduit 54 for forming a sorting air flow X described later in the casing 51 is provided. It is connected.

Further, inside the casing 51, a rotor 55 is disposed coaxially with the casing 51, which blows the raw material charged from the raw material charging chute 53 to the surroundings by centrifugal force, and the rotor 55 is rotated below the rotor. A drive motor 56 for driving is installed.

Further, the upper inner peripheral wall surface 5 of the casing 51.
A collision plate 57 against which the raw material blown by the rotor 55 collides is attached to the 1b.

The inner cylindrical portion 5 is provided below the casing 51.
8 of the partition plate 52 that defines the outer cylinder part 59 and the outer cylinder part 59.
A movable plate 60 for changing the separation diameter is installed in a, and the casing 51 that constitutes the outer wall of the outer tubular portion 59 is provided.
Below the protruding portion of the gas, the gas injected into the casing 51 from the annular nozzle portion 54a of the gas inflow conduit 54, the flight direction Y of the raw material blown by the rotor 55 in the casing 51, and the collision. Board 5
Falling direction Z of crushed material crushed by colliding with 7
The annular inlet opening 61a of the gas outflow conduit 61 intersects with the outer tubular portion 59 to form the sorted airflow X.
Are formed.

Further, the inner cylinder portion 58 and the outer cylinder portion 5 defined by the partition plate 52 in the lower portion of the casing 51.
9 and 9 are both narrowed down, and discharge ports 62 and 63 are formed at the lowermost ends, respectively.

The apparatus of the second embodiment of the vertical crusher according to the present invention constructed as above is operated as follows.

First, the rotor 55 for applying a centrifugal force to the raw material to be crushed and the blower (not shown) for forming the sorting air flow X in the casing 51 are rotated.

Next, when the sorting air flow X formed in the casing 51 becomes stable, the raw material charging chute 53 is placed.
The raw material W to be ground is charged into the casing 51.

The raw material W to be ground is put into the rotor 5 first.
The rotation of 5 gives a centrifugal force to the surroundings to fly in the horizontal direction, but since the sorting airflow X intersecting the flight direction Y of the raw material is formed in the casing 51, the sorting airflow is in the middle of the flight. Classification is performed from the balance between the viscous force of X and the inertial force for the raw material to maintain the flight direction Y, and the fine particles in the raw material have a small mass, so that the viscous force of the sorting air flow X is superior and the sorting is performed. It is carried by the air flow X, takes the path shown by the broken line in the figure, and is discharged from the discharge port 63 formed at the lower end of the outer tubular portion 59.

On the other hand, the coarse particles in the raw material are superior in inertial force for maintaining the flight direction Y given by the rotor,
After that, the horizontal flight shown by the solid line in the figure is continued, and it is crushed by colliding with the collision plate 57, and then falls downward. At this time, the sorting airflow X formed in the casing 51 is formed so as to intersect the falling direction Z of the crushed material crushed by colliding with the collision plate 57. Classification is performed from the balance between the viscous force of the air flow X and the inertial force of the crushed material for maintaining the falling direction Z, and since the fine particles in the crushed material have a small mass, the viscous force of the sorted air flow X is The discharge port 63 formed at the lower end of the outer cylinder portion 59 is transported to the sorted air flow X and takes the path indicated by the broken line in the figure.
More discharged. On the other hand, since the coarse particles in the crushed material have a large mass, the inertial force for maintaining the falling direction Z is predominant, and the coarse particles fall to the inner cylindrical portion 58 existing below, and the discharge port 64 formed at the lower end thereof. More discharged.

Therefore, in the above-described second embodiment of the present invention, a vertical crusher having a high crushing efficiency is obtained as in the first embodiment, and fine particles in the crushed material are also recovered. Since it becomes a device that can be used, it becomes a vertical crusher with high separation efficiency of fine particles.

Using the apparatus of the second embodiment according to the present invention described above, the air flow rate and the separation diameter of the sorting air flow X are changed during the operation of limestone having a diameter of 20 mm under the same operation as a normal crushing operation. By preparing the movable plate 60 for the above, fine particles of 3 mm or less could be recovered by 10 to 30% from the lower end discharge port 63 of the outer cylinder part 59.

Although the embodiments of the vertical crusher according to the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the technical idea of the present invention. And, of course, changes are possible.

[0039]

As described above, in the vertical crusher according to the present invention described above, since the vertical crusher has a built-in mechanism for separating fine particles, the fine particles in the raw material collide with the collision plate. Is avoided and excessive pulverization is avoided, and only coarse particles collide with the collision plate for pulverization, resulting in a vertical pulverizer with high pulverization efficiency.

Further, since the crushed material discharged from the vertical crusher according to the present invention is discharged in a state in which the coarse particles and the fine particles are separated to some extent, the fine particles are used as a product without changing the coarse particles. It is also possible to re-introduce into the pulverizer without connecting the classifier to the vertical pulverizer, and even when the classifier is installed, the classifier has a small processing capacity. .

[Brief description of drawings]

FIG. 1 is a conceptual vertical cross-sectional view showing a first embodiment of a vertical crusher according to the present invention.

FIG. 2 is a conceptual vertical cross-sectional view showing a second embodiment of the vertical crusher according to the present invention.

FIG. 3 is a conceptual vertical cross-sectional view showing an example of a vertical crusher that has been conventionally used.

[Explanation of symbols]

 1 Casing 2 Partition Plate 3 Raw Material Input Chute 4 Gas Inflow Conduit 5 Rotor 6 Drive Motor 7 Collision Plate 8 Inner Cylinder 9 Outer Cylinder 10 Movable Plate 11 Gas Outflow Conduit 12 Discharge Port 13 Discharge Port A Sorted Air Flow B Flight direction W Grinding raw material 51 Casing 52 Partition plate 53 Raw material input chute 54 Gas inflow conduit 55 Rotor 56 Drive motor 57 Collision plate 58 Inner cylinder part 59 Outer cylinder part 60 Movable plate 61 Gas outflow conduit 62 Discharge port 63 Discharge port X Sorting air flow Y Raw material flight direction Z Crushed product falling direction

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[Procedure amendment]

[Submission date] June 24, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

[Title of Invention] Vertical crusher

Claims (4)

[Claims] 1. A vertical crusher having a structure in which a raw material charged by a rotating rotor is horizontally spun and the raw material is crushed by colliding the raw material with an impact plate mounted on an inner wall surface side of a casing surrounding the rotor. , A lower part of a casing surrounding the rotor is formed with a double structure to form an inner cylinder part and an outer cylinder part, and a flight direction of a raw material blown by the rotor in one of the inner cylinder part and the outer cylinder part. A sorting airflow that intersects with the fine particles is conveyed by the sorting airflow to one of the inner cylinder part and the outer cylinder part, and crushed to the other of the inner cylinder part and the outer cylinder part. Vertical crusher characterized by being configured so that the crushed objects of 1. fall. 2. A vertical crusher as the above-described precondition is a substantially cylindrical casing, a raw material charging chute provided in a state of penetrating near the center of a top plate of the casing, and a charging from the raw material charging chute. A rotor disposed coaxially with the cylindrical casing that blows the generated raw material around it by centrifugal force, a drive motor that rotates the rotor, and the raw material that is blown by the rotor A crusher having a collision plate mounted on an inner peripheral wall surface of a casing, and a crushed material discharge port formed in a lower portion of the casing for discharging crushed material crushed by colliding with the collision plate. The vertical crusher according to claim 1. 3. The sorting airflow intersects the flight direction of the raw material blown by the rotor and flows into an inner cylindrical portion formed in the lower portion of the casing, and the sorting airflow causes fine particles in the raw material to be crushed. The vertical crusher according to claim 1 or 2, wherein the crushed material after the crushing is configured to drop while being conveyed and to an outer cylinder portion formed in a lower portion of the casing. 4. The lower part of the casing is formed by intersecting the flight direction of the raw material blown by the rotor and the falling direction of the crushed material crushed by the collision plate. The fine particles in the raw material before crushing and the fine particles in the crushed material after crushing are flown into the outer cylinder part and are crushed by the inner cylinder part formed in the lower part of the casing. The vertical crusher according to claim 1 or 2, characterized in that coarse particles in the crushed product of (1) are dropped.