JPS6354952A - Hammer for crusher - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a hammer for a crusher, and particularly to a swing type hammer that is rotatably attached to a pin on the outer peripheral side of a rotor of a crusher.

[Summary of the invention]

According to the present invention, reinforcing pieces are attached to the upper and lower surfaces of the edge portion on the distal end side of the hammer, and the end surface on the distal end side, respectively, to prevent the edge from being worn out and to prevent the edge portion from being worn out. This allows new edges to be formed without becoming round and worn out. [Prior Art] In a crusher using a swing type hammer, the hammer is rotatably supported by a pin implanted in the rotor, and the rotor equipped with the hammer is arranged within a screen so as to be fixed at a constant position with respect to the screen. The hammer is rotated together with the rotor so that it has a clearance of . For example, as shown in FIG. 10, a conventional hammer 1 has a rectangular shape made of a stainless steel plate, and has left and right sides.
It was shaped to include a pair of pin insertion holes 2. It was designed to be attached to the rotor through the pin insertion hole 2 on one side. (Problems to be Solved by the Invention) The conventional hammers of such a crusher had a problem in that during crushing, the edges 3 gradually wore out and became rounded as shown by the solid line in Fig. 10. Since the hammer 1 is equipped with four edges 3, by turning it over, or by reversing the pin insertion hole 2 and using the tip on the opposite side, it is possible to crush with the edges 3 that do not wear out. However, in the case of hard raw materials, there is a problem that the edge 3 will quickly wear out and the processing capacity will drop.Therefore, in the case of hard raw materials, the machine must be stopped frequently and the installation position of the hammer 1 must be changed. It was necessary to replace the hammer with a new one.Also, because the edge 3 wears round, the clearance between it and the screen tends to change, which has the disadvantage of changing the particle size distribution of the crushed raw material. The invention has been made in view of these problems, and an object of the present invention is to provide a hammer for a crusher in which the edge portion is not easily worn out, and even if it is worn out, new edges are still formed. Means for Solving Problem K] The present invention provides a swing type hammer which is rotatably attached to a pin on the outer circumferential side of a rotor of a crusher. Reinforcing pieces are attached to the upper and lower surfaces of the side edges and the end surface of the tip.

[Effect]

Therefore, according to the present invention, it is possible to prevent wear of the edge portion of the hammer by means of reinforcing pieces attached to the upper and lower surfaces of the edge portion of the hammer, and to the end surface of the tip portion. In addition, even if the edge part is worn out, it is possible to form a new edge with the reinforcing piece attached to the end face, especially on the tip side, thereby reducing changes in the clearance between it and the casing. becomes possible.

【Example】

The outline of a swing hammer type crusher will be explained with reference to FIGS. 7 and 8. The crusher is equipped with a drive shaft 10, to which a rotor disk 11 is fixed. And on the rotor disk 11 there are 12
Three pins 12 are recessed at 0° intervals. The other ends of these pins 12 are connected to each other by a ring-shaped frame 13. And the above three pins 12
A plurality of hammers 14 are supported by each of them. Note that the hammer 1 is located on the outer circumferential side of the pin 12.
Spacers 19 are attached between the hammers 14, so that the hammers 14 are arranged at regular intervals in the axial direction. The rotor 11 supporting the hammer 14 by the pin 12 in this manner is assembled into the casing 15. A screen 1 is provided inside the casing 15 in the circumferential direction.
6 is disposed, and the rotor 11 is disposed therein. When the rotor 11 rotates, the centrifugal force causes the hammer 1 to
4 are arranged in the radial direction to form a predetermined clearance between their tips and the screen 16. Therefore, when the raw material is inputted from the upper raw material input port 17, the raw stone is hit by the rotating hammer 14 and crushed, and falls outward from the opening of the screen 16, and is taken out through the discharge port 18. It has become. Next, to explain the hammer attached to the rotor disk 11, the hammer 14 is attached to the hard stainless steel plate 2 in the shape of a strip.
1, and includes a pair of pin insertion holes 22. As a result, when the edges on both sides of one end are worn out, the edges on the other end are used, making it possible to use the tool a total of four times. Further, reinforcing pieces 23 are attached to the upper and lower surfaces of the plate 21 at the corners of its four sides, respectively. In addition, a long and thin reinforcing piece 24 is attached to the end surface on the tip side.
is ready to be installed. Furthermore, another elongated reinforcing piece 25 is attached to the side end surface whose upper and lower surfaces are reinforced by the reinforcing piece 23. Note that these pieces 23.24.
25 are both made of a superhard material, such as titanium carbide, and are attached to the edge portion of the plate 21 by welding. In this way, the edge part is the reinforcing piece 23.24.2
Hammer 14 consisting of plate 21 reinforced by 5
is the rotor 1 of the crusher as shown in FIGS. 7 and 8.
1 through pin 12,
When the rotor 11 is rotationally driven via the drive shaft 10, the screens 1 are aligned in the radial direction due to centrifugal force.
It will rotate within 6. The clearance between the edge of the hammer 14 and the screen 16 allows the raw material input from the raw material input port 17 to be crushed to a predetermined particle size. If a hard material is introduced, the edge portion of the hammer 14 will be subjected to a large load, which will cause the edge portion to wear as shown in FIG. However, in such a hammer, since the upper and lower surfaces of the edge portion are each reinforced by reinforcing pieces 23, when the hammer wears out, it becomes as shown in FIG. 6, and the plate 21 becomes damaged. Even if the side end surface is worn, the reinforcing piece 23, which is harder than the plate 21, will protrude from the side end surface of the plate 21. piece 23
Since the plate 21 is thinner than the plate 21, it becomes a sharp edge that further crushes the new raw material. Therefore, the pulverization efficiency will not decrease. Furthermore, according to such a hammer 14, even if the edge portion of the plate 21 is worn out, the reinforcing piece 24 attached to the end face of the plate 21 in particular forms a new edge as shown in FIG. I will do it. Therefore, from this, the edge portion of the hammer 14 will not be rounded like in the past, and the efficiency of crushing will not decrease.
f7') According to the inventor's experiments, the hammer 14 to which titanium carbide reinforcing pieces 23, 24, and 25 are attached is more durable than the conventional hammer made of stainless steel I (SUS410) as shown in Fig. 10. The performance has been improved by 7 to 8 times. Furthermore, the particle size distribution when using a hammer reinforced with such reinforcing pieces 23 to 25 is shown in Figure 9, and the difference in particle size distribution is narrower than when using a conventional hammer. This results in improved particle size distribution. KEffects of the Invention According to the present invention, reinforcing pieces are attached to the upper and lower surfaces of the edge portion on the tip side of a swing type hammer, and to the end surface on the tip side. Therefore, wear of the hammer is reduced, and even if the hammer is worn, a new edge is always formed, and the edge portion is prevented from becoming rounded.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the tip of a hammer according to an embodiment of the present invention, FIG. 2 is a front view of the hammer, FIG. 3 is a plan view, FIG. 4 is a side view, and FIG. 6 is a plan view of the main part of a worn hammer, FIG. 6 is a sectional view taken along the line ■ to ■ in FIG. 5, FIG. 7 is an external perspective view of the rotor with the hammer attached, and FIG. FIG. 9 is a graph showing particle size distribution by crushing, and FIG. 10 is a plan view of a conventional hammer. In addition, in the symbols used in the drawings, 11... Rotor disk 12... Pin 14... Hammer 16... Screen 22... Pin insertion hole 23... Reinforcement piece (for upper and lower surfaces) 24. ...A reinforcing piece (for the tip surface).

Claims (1)

[Claims] In a swing type hammer that is rotatably attached to a pin on the outer circumferential side of the rotor of a crusher,
A hammer for a crusher, characterized in that reinforcing pieces are attached to the upper and lower surfaces of the edge portion on the tip side and the end surface on the tip side.