JPH0520439Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a method for crushing objects such as rocks that are fed from the center to a rotor rotating at high speed, and using centrifugal force to move the material to be crushed from the outlet on the circumferential side of the rotor in the tangential direction. The present invention relates to a chip plate installed at the outlet of the rotor in a centrifugal crusher that crushes chips by colliding with a metal crushing surface around the rotor or against a dead bed formed of crushed materials.

Prior Art The rotor in this type of centrifugal crusher is generally
Consisting of a pair of upper and lower discs and a wall plate that connects both discs and defines a passage leading to the outlet on the peripheral side, the material to be crushed that is fed from the center is transported to the outlet using centrifugal force. After being moved, it is designed to fly in a tangential direction from this point, so that a dead bed is formed on the wall plate due to the accumulation of the supplied ore to be crushed. Such an accumulated layer of crushed materials protects the wall plate from wear due to friction with the crushed materials, but it is important to avoid the area near the exit where the crushed materials are most strongly pressed against the passage wall due to the action of centrifugal force. In this case, no deposited layer of crushed material is formed. To protect this area, conventionally, as shown in FIGS. 2 and 3, a chip plate 4 with a highly wear-resistant carbide chip 5 attached to the inside of the tip facing diagonally inward is attached to the wall plate 2. It was installed so that the tip protruded toward the exit.

Problems to be Solved by the Invention The material to be crushed that comes out of the outlet scrapes the tip of the chip plate, causing the tip of the chip plate to gradually wear out as shown in Figure 4. As shown in the figure, the reason why the wear from the outside is severe and curved is because small-sized objects to be crushed are decelerated by air resistance and rubbed along the tip of the chip plate while being pressed.

The chip plate must be replaced when wear has progressed to a certain extent. Therefore, the degree of wear is checked from time to time, and the chip plate is replaced based on the results, but it is not easy to judge when it is time to replace it based on the amount of wear.

This invention was made in consideration of these points,
This makes it easy to judge when it is time to replace the chip plate.

Solution to the Problem Therefore, the chip plate of the present invention has a deep cut groove extending from the outer corner of the tip toward the carbide chip along the direction in which the object to be crushed slides into contact with the chip, and also has a cut groove on the outside of the tip. A shallow groove is formed perpendicular to the groove.

Function As wear progresses, the cut grooves initially become shallower, and as the wear progresses further, the chip plate is replaced when it reaches a shallow groove and disappears.

The cut grooves are formed outside the tip surface of the tip of the tip plate that protrudes from the wall plate towards the outlet, and the shallow grooves are formed on the outside of the tip, making the grooves easy to see from the outside of the rotor. This makes it easy to inspect the grooves.

Since the cut grooves are formed along the direction in which the object to be crushed slides, and the shallow grooves are formed in a direction perpendicular to this direction, uneven wear can be detected in any direction.

Even if the cut grooves are deep, they are formed along the direction in which the material to be crushed slides into contact, and shallow grooves are formed on the outside of the tip.
Does not adversely affect the strength of the tip that holds the carbide tip.

Embodiment In a rotor 3 composed of a disk 1 and a wall plate 2 defining a passage with the disk, a tip plate 4 provided at the outlet and a carbide tip 5 attached to the tip thereof are provided. As shown in Figs. 1 and 3, it is divided into upper and lower parts so that when one side becomes unevenly worn, it can be replaced with the other, or only the worn part can be replaced, and each has a cutting groove 6 that reaches the carbide tip 5. A concave groove 7 is formed near the tip of the outer portion at a constant interval from the tip.

In the case of this embodiment, wear progresses and the cut groove 6
When one or both of the grooves 7 and 7 disappear, the tip plate is replaced.

In this embodiment, two types of identification means, the cut groove 6 and the groove 7, are provided, but in another embodiment, only one of the grooves is formed, and in another embodiment, the above-mentioned groove is replaced. , other identification means are provided.

Further, in this embodiment, the chip plate is divided, but in other embodiments, it is not divided and is integrally formed as before.

Effects of the Invention As described above, the chip plate of the present invention has a tip plate that extends from the outer corner of the tip that protrudes from the wall plate defining the passage toward the outlet on the circumferential side of the rotor along the direction in which the object to be crushed comes into sliding contact. A deep cut groove is formed toward the hard tip, and a shallow groove perpendicular to the cut groove is formed on the outside of the tip, and the following effects are achieved.

(1) Since both grooves can be directly seen from the outside of the rotor, inspection of the grooves is easy.

(2) It is possible to know the degree of wear by looking at the remaining grooves that gradually disappear due to wear, making it easier to determine when to replace the chip plate and predict when to replace the chip plate. You can also do that.

(3) Because the deep cut grooves and shallow grooves are formed in the direction in which the material to be crushed slides into contact and in the direction perpendicular to this, and because the shallow grooves are formed on the outside of the tip, the tip It does not adversely affect the supporting strength of the carbide chips, and even if the material to be shredded comes into contact with the carbide chips and gives an impact, it will maintain the same strength as conventional ones. , the tip will not be damaged and the carbide tip will not easily fall off.

(5) Each groove can be easily machined in one cutting process.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a chip plate to which a carbide chip according to the present invention is attached, Figure 2 is a sectional view of the same, and Figure 3 is a sectional view of the same.
The figure is a sectional view of the rotor, and FIG. 4 is a sectional view of a worn chip plate. 1...disk, 2...wall plate, 3...rotor, 4...
...Chip plate, 5... Carbide chip, 6... Cut groove, 7... Groove.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower discs, a wall plate that connects both discs and defines a passage leading to the outlet, and a wall plate that is attached to the wall plate and whose tip protrudes from the wall plate toward the outlet, and which is located on the inside of the tip. In the rotor of a centrifugal crusher, which consists of a chip plate with highly abrasion-resistant carbide chips attached diagonally inward, the rotor is made from the outer corner of the tip toward the carbide chips along the direction in which the material to be shredded comes into sliding contact. A chip plate characterized in that a deep cut groove is formed and a shallow groove perpendicular to the cut groove is formed on the outside of the tip.