JPH0116520Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to an impact blade for a repulsion type crusher that finely crushes coal, coke, stones, etc., and specifically, it has both wear resistance and impact resistance. This invention relates to an impact blade for a repulsion type crusher that has excellent properties.

[Conventional technology]

Conventional countermeasures for the impact blades of repulsion type crushers, for example, in order to ensure a constant grinding particle size and extend the life of the impact blades, are to apply surface hardening to the front end of the impact blade in the rotational direction, that is, the worn part. It is common that Although superhard alloys and ceramics are excellent wear-resistant materials, they have poor impact resistance, and hard foreign matter is mixed in with the materials to be crushed, such as coal, and these foreign matter cannot be passed through the repulsion type crusher. At present, it is difficult to remove 100% of the material before introducing the material to be crushed, so it is impossible to use super hard alloys, ceramics, etc. as overlays on worn parts.

On the other hand, in Japanese Utility Model Publication No. 39-18397, the top surface of the impact blade body is made to form an acute angle with respect to the front surface, and this top surface has the above-mentioned high abrasion resistance but poor impact resistance. A repulsion type crusher is disclosed in which an abrasive material is attached, the abrasive material is protected from foreign substances by the front surface of the impact blade body, and the material to be crushed is crushed at the tip of the abrasive material. However, the impact of the impact blades in a repulsion type crusher is not limited to only from the front in the direction of rotation, but may also be applied from the outside in the radial direction of the rotating shaft and even from the rear in the direction of rotation. Hajiko Sho 39
It was difficult to sufficiently protect the wear-resistant material with the impact blade of Publication No.-18397.

For this reason, Publication No. 54-20123 and Utility Model Publication No. 54-20123
In impact blades for repulsion type crushers such as Publication No. 54-83673,
Most of the tip made of wear-resistant material is embedded within the impact blade body made of impact resistant material, and only the tip of the tip is exposed on the surface of the impact blade body at the top or front surface of the impact blade body.

[The problem that the idea attempts to solve]

In the impact blade for a repulsion type crusher, the material to be crushed passes through the gap between the repulsion plate and the impact blade and exits toward the outlet, so the boundary corner between the front surface and the top surface of the impact blade body is Mainly comes into contact with the object to be crushed and crushes the object. In the above-mentioned Japanese Utility Model Publication No. 54-20123 and Japanese Utility Model Application Publication No. 54-83673, the tips of the chips are exposed on the top or front surface of the impact blade body, so the wear resistance of impact blades for repulsive crushers is poor. The grinding capacity and crushing ability are not fully demonstrated.

The purpose of this invention was to embed most of the chips made of wear-resistant material into the impact blade body made of impact-resistant material to ensure the impact resistance of the impact blade for repulsion type crushers, and to The objective is to improve the wear resistance and crushing ability of the impact blade.

[Means to solve the problem]

According to the impact blade for a repulsion type crusher of this invention, the chips made of the wear-resistant material are tilted outward in the radial direction of the rotating drum, and the chips made of the impact-resistant material are tilted toward the front in the rotational direction of the rotating drum. It is embedded within the blade body, and the sharp tip of the tip is exposed at the boundary between the front surface and the top surface of the impact blade body.

〔Example〕

This invention will be described below with reference to embodiments.

First, FIG. 3 is a schematic overall view of a crusher that is a repulsion type crusher 10, in which a rotating body, ie, a rotating drum 12, is mounted on a horizontal rotating shaft 14 and disposed within a housing 16. The impact members or impact blades 18 are attached to the outer periphery of the rotating drum 12 at equal angular intervals, and are arranged along the arrow 2 along with the rotating drum 12.
Rotate in the 0 direction. Objects to be crushed, such as coal, coke, and stones, are supplied into the housing 16 from the inlet 22 at the top of the housing 16, are struck and accelerated by the impact blade 18, and are made to collide with the repulsion plate 24, and such collisions are repeated. The powder is pulverized to a predetermined particle size and discharged from the housing 16 through the outlet 26 at the bottom of the housing 16.

FIG. 4 is a detailed view of the range of the impact blade 18 in FIG. It is fixed to the blade holder 28 with a bolt (not shown).

FIG. 1 is a detailed view of the impact blade 18. impact blade 1
Reference numeral 8 has an impact member body or impact blade body 30 made of impact resistant material such as alloy steel and mild steel, and the impact blade body in the radial direction of the rotating drum 12 (arrow 32 indicates the radially outward direction). A bolt hole 34 through which a bolt for fixing the impact blade 18 to the blade holder 28 is passed is bored in the center of the blade 30 . The tip 36 is made of a material with better wear resistance than the impact blade body 30, such as super hard alloy and ceramic, and is directed radially outward (arrow 32) and toward the front in the rotational direction of the rotating drum 12 (arrow 20).
The tip 36 is embedded in the impact blade main body 30 so as to be inclined to the impact blade main body 30.
It is exposed at the boundary between the front surface and the top surface.

When the rotary drum 12 rotates, the material to be crushed is cut and crushed by the tips of the chips 36, so that wear of the impact blades 18 is suppressed. In addition, since the tip 36 other than the tip, that is, the cutting edge that approaches cutting and crushing, is inside the impact blade body 30, hard foreign matter mixed in the object to be crushed can impact the impact blade 18 from any direction. Even if the impact occurs, the tip 36 is protected from such impact by the impact blade body 30 and can be spared from damage.

FIG. 2 shows another embodiment of the impact blade 18, in which the back side of the top of the impact blade main body 30 is a slope 38. The formation of the slope 38 allows for improved particle size control of the material to be crushed.

[Effect of idea]

In this invention, the tip made of wear-resistant material is largely embedded within the impact blade body of impact-resistant material and is protected from impacts from any direction.

In addition, in this invention, the tip is inclined outward in the radial direction of the rotating drum and forward in the rotational direction of the rotating drum, and the sharp tip portion is exposed at the boundary between the front surface and the top surface of the impact blade body. . In the impact blade for a repulsion type crusher, the material to be crushed passes through the gap between the repulsion plate and the impact blade and exits toward the outlet, and the corner between the front and top surfaces of the impact blade body is mainly The impact blade for the repulsion type crusher has improved wear resistance by exposing the sharp end of the chip to the boundary between the front surface and the top surface of the impact blade body, since it comes into contact with the object to be crushed and crushes the object. and the crushing capacity can be increased.

[Brief explanation of drawings]

Figures 1 and 2 are structural diagrams of the impact blades of the repulsion type crusher to which this invention has been applied, Figure 3 is a schematic overall view of the repulsion type crusher, and Figure 4 is the impact blade shown in Figure 3. FIG. 3 is a detailed view of the area of the blade; In the figure, 10... Repulsion type crusher, 12
... Rotating drum (rotating body), 18 ... Impact blade (impact member), 20 ... Arrow (rotation direction), 30 ... Impact blade body (impact member main body), 32 ... Arrow (radially outward) , 36...chip.

Claims (1)

[Claims for Utility Model Registration] (1) In an impact blade attached to the outer periphery of a rotating drum of a repulsive crusher, the impact blade body is made of an impact-resistant material, and the chips are made of a material that is stronger than the material of the impact blade body. The impact blade is made of a material with excellent wear resistance, and is embedded in the impact blade body so as to be inclined outward in the radial direction of the rotating drum and forward in the rotational direction of the rotating drum, and the tip of the tip has an acute angle. An impact blade for a repulsion type crusher, wherein the impact blade is exposed at a boundary between the front surface and the top surface of the impact blade main body. (2) The impact blade for a repulsion type crusher according to claim 1, wherein the material of the chips is a superhard alloy or ceramic.