JPH0780333A - Crusher - Google Patents

Abstract

PURPOSE:To prevent the abnormal wear of the outer peripheral part of a rotor body due to the passing of a raw material and to prevent an excessive unbalance state from being brought about due to the rotation of a rotor, in a vertical impact crusher. CONSTITUTION:A notch part 7b, for example, in a semicircle is formed in the fitting part of a tip member 8 in the outer peripheral part of a rotor body 7. A superhard tip 9 fitted to the tip member 8 is divided in plurality towards about the direction of the radius of the rotor body 7. In this way, all the divided superhard tips do not fall due to the collision with foreign matter in a raw material, and the tip member 8 is continuously protected by the remaining superhard tip. Thus, the outer peripheral part of the rotor body 7 is protected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical impact type crusher used for crushing or sizing rocks or ores.

[0002]

2. Description of the Related Art Generally, in a crusher of this type, as shown in FIGS. 6 and 7, for example, raw materials such as rocks fed from the upper part of a rotor 1 rotating at a high speed are applied to an outer peripheral portion of a main body 2 of the rotor 1. It is discharged by centrifugal force through the opening 2a provided and is provided around the rotor 1, for example, an anvil 3
It is crushed by colliding with. In this case, the end of the opening 2a is protected by a tip member 5 having a cemented carbide tip 4, and the raw material introduced into the rotor 1 contains the dead stock 6 formed inside the main body 2 and the raw material. It is led out from the opening 2a to the outside along the tip of the tip member 5.

[0003]

However, in the conventional crusher as described above, when a foreign substance such as an iron piece is mixed in the raw material, the cemented carbide chip 4 is collided with the foreign substance by collision with the foreign substance. There is a possibility that the cemented carbide tip 4 will fall off the tip member 5 due to cracking. When the cemented carbide tip 4 falls off from the tip member 5 in this way, the abrasion of the tip member 5 due to contact with the raw material rapidly progresses (see FIG. 8).
As a result, the rotor 1 will be greatly worn from the inside to the outside of the main body 2 of the rotor 1. This wear condition cannot be visually recognized while advancing through the thickness portion of the main body 2 and can be known only when the wear of the equivalent thickness portion progresses to the outside of the main body 2. Under this circumstance, the amount of wear in the worn portion is considerably large, which causes a large imbalance due to the rotation of the rotor 1, and the maintenance of the worn portion requires considerable labor and cost. Therefore, the present invention has been devised in view of the above circumstances, and prevents an abnormal wear of the inner peripheral portion of the rotor main body due to the passage of the object to be crushed, resulting in an excessively unbalanced situation due to the rotation of the rotor. The purpose is to provide a crusher having no structure.

[0004]

Means for Solving the Problems To achieve the above object, the means adopted by the first invention is the gist of the invention, in which the object to be crushed introduced into a rotor rotating at a high speed In a crusher that discharges by centrifugal force through an opening protected by a tip member having a carbide tip provided in the section, collides against the collision surface around the rotor and crushes, the carbide tip is approximately the radius of the rotor. It is a crusher according to a point in which the tip member is divided into a plurality of parts and attached to the tip member. Further, the gist of the means adopted by the second invention is that the material to be crushed put into the rotor rotating at high speed is protected by the tip member having the superhard tip provided on the outer periphery of the rotor body. In a crusher that discharges by centrifugal force through the opening and collides against the collision surface around the rotor to crush it, at the attachment portion of the tip member on the outer peripheral portion of the rotor body, with a predetermined shape, from the opening side to the substantially circular shape of the rotor It is a crusher according to a point in which a cutout portion that is recessed in the circumferential direction is formed.

[0005]

In the crusher according to the first aspect of the present invention, the chip member is continuously protected by the remaining cemented carbide chips even if some of the cemented carbide chips fall off due to collision with foreign matter in the crushed object.
As a result, the outer peripheral portion of the rotor body is not abnormally worn, and it is possible to prevent excessive imbalance. Also,
In the crusher according to the second aspect of the present invention, since the notch of a predetermined shape is formed in advance corresponding to the portion of the outer peripheral portion of the rotor body through which the object to be crushed passes, for example, even if the tip member is worn, The crushed material is immediately discharged from the cutout portion without wearing the rotor body. As a result, an excessive unbalanced state is generated and abnormal vibrations and sounds are generated. By detecting these, it is possible to perform maintenance before the outer peripheral portion of the rotor body is abnormally worn.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. It should be noted that the following embodiments are examples of embodying the present invention, and are not intended to limit the technical scope of the present invention. here,
1 is a perspective view of a main part of a crusher according to an embodiment of the present invention, FIG. 2 is a perspective view of a rotor body constituting the crusher, and FIG. 3 is a plan view of a chip member constituting the crusher. 4 is for explaining the wear condition of the tip member,
(A) is a front view, (B) is an AA 'arrow view in (A), and FIG. 5 is a perspective view of a main part of a rotor main body according to another embodiment applicable to the crusher. The crusher according to this embodiment has substantially the same basic structure as the above-mentioned conventional crusher. The difference from this conventional crusher is that the rotor main body 7 has the same structure as shown in FIGS. 1, 2 and 3. The rotor body 7 is attached to the mounting portion of the tip member 8 on the outer peripheral portion, for example, in a semicircular shape from the opening 7a side
Forming a notch 7b for passing a raw material that is recessed in the circumferential direction of the rotor body 7 and attaching a cemented carbide tip 9 for protecting the tip member 8 to the rotor body 7
That is, the first cemented carbide tip 9a and the second cemented carbide tip 9b are divided in the substantially radial direction and attached to the tip member 8. Further, in the cemented carbide tip 9, for example, a copper plate 10 is interposed between the first cemented carbide tip 9a and the second cemented carbide tip 9b, and the first cemented carbide tip 9a and the second cemented carbide tip 9b. The hardness is substantially equal to that of 9b, or the second cemented carbide tip 9b is set to have a lower hardness. Chip member 8 including the cemented carbide chip 9 configured as described above
Then, even if a foreign substance such as an iron piece contained in the raw material collides with the cemented carbide tip 9 and the first cemented carbide tip 9a falls off, the second cemented carbide tip 9b is still in a firmly attached state. Left under the chip member 8. By this,
The tip member 8 is subsequently protected from collision with the raw material, which in turn avoids a situation in which the outer peripheral portion of the rotor body 7 is abnormally worn.

Further, in the above structure, when the first cemented carbide tip 9a falls off due to a collision with a foreign substance or when the wear of the first cemented carbide tip 9a progresses due to a normal crushing action, The copper plate 10 is exposed on the front surface before reaching the cemented carbide tip 9b (see FIGS. 4A and 4B), and by using this as a guide, the criterion for the replacement timing of the tip member 8 is obtained. The tip member 8 can always be replaced with a new tip member before the tip member 8 is abnormally worn, and the rotor body 7 can be protected for a long period of time.
In addition, the interposition of the copper plate 10 is omitted, and the first carbide tip 9
You may make it exhibit the above-mentioned function by changing the color of a and the 2nd cemented carbide tip 9b. Although the outer peripheral portion of the rotor body 7 is protected as described above, even if the tip member 8 falls off due to wear, the outer peripheral portion of the rotor body 7 can be made to correspond to the portion through which the raw material passes. Since the notch 7b is formed as described above, the outer periphery of the rotor body 7 is not directly worn by the passage of the raw material, and the raw material is immediately discharged from the notch 7b. As a result, since the rotor causes an abnormal imbalance, it can be detected by the occurrence of abnormal vibration or noise before the outer peripheral portion of the rotor body 7 is abnormally worn. The balance due to is always stable. With the above-mentioned configuration, it is possible to avoid the inconvenience that the maintenance of the worn portion requires a lot of labor and cost as in the case of the conventional crusher. Further, it is possible to immediately know the damage of the chip member 8 by the discharge of the raw material from the cutout portion 7b, and the maintenance in the crusher can be immediately carried out. In the present embodiment, the semicircular cutout 7b may be replaced by a rectangular cutout 7c as shown in FIG. 5, for example. In the above-described embodiment, the configuration in which the notch portion is provided in the rotor body 7 and the configuration in which the cemented carbide tip 9 is divided into a plurality of parts are used together, but each configuration is applied to a crusher separately, and abnormal wear of the rotor body 7 is caused. It goes without saying that it is possible to prevent this.

[0008]

Since the crusher according to the present invention is configured as described above, it is possible to suitably prevent abnormal wear of the outer peripheral portion of the rotor main body due to passage of the crushed material, and to prevent the rotor from rotating. Avoiding excessively unbalanced situations.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a crusher according to an embodiment of the present invention.

FIG. 2 is a perspective view of a rotor body that constitutes the crusher.

FIG. 3 is a plan view of a chip member that constitutes the crusher.

4A and 4B are views for explaining the wear condition of the tip member, where FIG. 4A is a front view and FIG. 4B is a view taken along the line AA ′ in FIG.

FIG. 5 is a perspective view of a main part of a rotor body according to another embodiment applicable to the crusher.

FIG. 6 is a perspective view of a main part of a conventional crusher.

FIG. 7 is a plan sectional view of FIG.

FIG. 8 is a view for explaining the progress of wear of the tip member and the rotor body in the conventional crusher.

[Explanation of symbols]

 7 ... Rotor main body 7a ... Openings 7b, 7c ... Notch portion 8 ... Chip member 9 ... Carbide tip 9a ... First cemented carbide tip 9b ... Second cemented carbide tip

Claims (2)

[Claims] 1. A crushed object thrown into a rotor rotating at a high speed is discharged by centrifugal force through an opening protected by a tip member having a cemented carbide tip provided on the outer peripheral portion of the rotor body, and collides with the circumference of the rotor. A crusher which collides against a surface and crushes, wherein the cemented carbide tip is divided into a plurality of pieces in a substantially radial direction of the rotor and is attached to the tip member. 2. A crushed object thrown into a rotor rotating at a high speed is discharged by centrifugal force through an opening protected by a chip member having a cemented carbide chip provided on the outer peripheral portion of the rotor body, and collides with the rotor periphery. In a crusher that crushes by colliding with a surface, a notch formed in a predetermined shape from the opening side in a substantially circumferential direction of the rotor is formed in a mounting portion of the tip member on an outer peripheral portion of the rotor body. Characterizing crusher.