JPH0349622B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for crushing stones, removing the stones by abrading the sharp edges, and classifying the stones into two or more types.

It is known to incorporate large numbers of pebbles into concrete blocks to improve the appearance of the block surface.

In known blocks, the mixed pebbles are polished and used. The reason for this is that polished pebbles are glossier and rounder, so the appearance on the surface of the block is better.

Previously, the material had to be crushed and then subjected to a polishing machine, which not only took a long time but also increased costs. Furthermore, conventional equipment caused problems with dust and created a poor working environment.

In addition, in the conventional device, polishing and classification were performed in separate devices, so stones had to be passed through a classifier in order to obtain stones classified by particle size, further increasing costs.

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks, and to provide an apparatus that can sufficiently crush, polish, and classify with just one apparatus, and does not generate dust.

This will be explained below using figures.

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG.

A rotor 2 is eccentrically placed inside a shell 1 consisting of a rotating drum. A raw stone supply port 3 is provided at one end of the shell 1, and a crushed stone discharge port 4 is provided at the other end. A plurality of liners 5 are provided on the inner surface of the shell 1, and the liners 5 are slightly twisted in a spiral shape to perform a stone feeding action. A liner 6 is also placed around the outer circumference of the rotor 2.
is provided, and the liner 6 may be linear or spiral.

The liner 5 is cut short on the side of the discharge port 4, thereby forming a fitting space 7, which will be described later, in the vicinity of the discharge port 4 of the shell 1.

The rubbing space 7 is an area where crushed stones are rubbed together, thereby smoothing the surface of the stones. For this reason, the generation of fine powder from the stones later is reduced, but a large amount of broken powder is generated in this rubbing space 7.

A mesh shell 8 is connected to the end of the discharge port 4 of the shell 1. The mesh shell 8 has a large number of openings 9, and stones are classified into those that pass through the openings 9 and those that fall from the ends of the mesh shell 8, as will be described later.

Referring also to FIG. 2, which is a cross-sectional view taken along line A-A in FIG. It is opened in the covering body 14. Air inlet 11
It faces the stone M that is being rubbed together, and is placed in the opposite position from the side where the stone M is shifted due to the rotation of the shell 1. The suction port 13 is not limited to the embodiment, and may be opened directly above the rubbing space 7, for example. Chutees 15 and 16 are provided below the cover 14 to drop crushed stones onto belt conveyors 17 and 18. In this case, shoot 15 is mesh shell 8
The chute 16 receives the stones that have passed through the opening of the mesh shell 8 and sends them onto the belt conveyor 17, and the chute 16 receives the stones falling from the end of the mesh shell 8 and sends them to the belt conveyor 18. The raw ore to be crushed is sent from the belt conveyor 19 to the chute 16 and introduced into the supply port 3 of the shell 1.

FIG. 3 is a cross-sectional view taken along line B-B in FIG. It has become a vine, and Ciel 1
The center of the rotor 2 is O ₁ , and the center of the rotor 2 is O ₂ .

The operation of the present invention configured as described above is as follows.

The raw stone introduced into Shell 1 is 50 mm or less, and this is to be crushed to at least 25 mm or less.

First, the introduced stone M is lifted upward by the liner 5, and then falls. Then, they enter the gap h between the liners 5 and 6, are forced together, and are crushed. Since the liner 5 has a slightly spiral shape, it gradually moves toward the discharge port 4 side while repeating upward lifting and falling.

The stones that have progressed to the rubbing space 7 are rubbed together here and their surfaces are scraped. However, during the grinding process, a large amount of fine powder is generated, which is mixed into the crushed stone. Therefore,
Air is sent by blower 10, and this is sent to air inlet 1.
Spray on stone M from 1. Then, the fine powder flies up and spreads inside the cover 14 and the shell 1. The capacity of the dust collector 12 is larger than that of the blower 10,
When the air and fine powder inside the cover 14 are sucked from the suction port 11, the fine powder does not come out to the outside of the cover 14.
The stones that have been ground together are transferred from the discharge port 4 to the mesh shell 8. Opening 9 of mesh shell 8
is 5 mm, and stones of 5 mm or less fall through this opening 9 and are sent to a predetermined upper level via a chute 15 and a belt conveyor 17.

Also, stones with a size of 5 to 25 mm fall from the end of the mesh shell 8 and are sent to a predetermined process via a chute 16 and a belt conveyor 18.

In the above, the predetermined process refers to a washing process, an underwater polishing process, etc., which are adopted as necessary.

As explained above, according to the present invention, a grinding space is provided in the crusher, and crushed stones are ground together in this space, thereby making it possible to take the corners of the stone surfaces. In addition, air is blown onto the stone during the grinding process to stir up fine powder, which can be sucked up by a dust collector, so that no fine powder gets mixed in with the stone being taken out.

Further, by providing a mesh shell, crushed stones can be classified and taken out. In addition, it is also possible to classify particles into a larger number of particle sizes by changing the diameter of the opening provided in the mesh shell in the axial direction.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is a sectional view taken along line A-A in Figure 1, and Figure 3 is B in Figure 1.
-B sectional view.

Claims (1)

[Claims] 1. A drum-shaped rotatable shell having a raw stone supply port at one end and a discharge port at the other end, a rotor provided eccentrically within the shell, and a plurality of rotatable shells provided on the inner surface of the shell and the outer periphery of the rotor. At least the liner on the inner surface of the shell is twisted spirally to perform a feeding action, and the liner on the inner surface of the shell is shortened on the discharge port side to form a rubbing space near the shell discharge port,
A mesh shell having a large number of openings is connected to the end of the shell discharge port, and the mesh shell classifies particles into sizes that pass through the mesh and particles that fall from the end of the mesh shell. Open the air inlet,
An apparatus for crushing and classifying raw stones, characterized in that a suction port of a dust collector is opened in a cover that covers the discharge port of the shell and the mesh shell.