JPH0746385Y2 - Grinding material selection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a crushed raw material sorting apparatus.

[Prior Art] When manufacturing cement or the like, it is necessary to pulverize raw materials, and normally, pulverization was performed using a ball mill or the like.

However, although the ball mill is excellent in pulverization performance, it takes time to pulverize the raw material, so that there is a problem that the production capacity cannot be increased by the method of directly introducing the raw material into the ball mill.

Therefore, in recent years, it has become common to carry out preliminary crushing with a crusher or a roll mill before main crushing with a ball mill or the like.

In addition, the crushed raw material crushed by preliminary crushing is sorted by a crushing raw material sorting device such as a vibrating screen, and the crushed material having a required particle size or less is sent to the main crushing device, and the coarse crushed material having a required particle size or more is preliminarily crushed again. To be sent to.

[Problems to be solved by the invention] However, the vibrating screen that selects the particle size of the crushed raw material crushed by the preliminary crushing is apt to be clogged, and it is necessary to frequently replace the screen of the vibrating screen, so that it is necessary for maintenance. It requires a lot of labor and cost, and it is necessary to take measures against vibration, so that the apparatus has various problems such as complexity and size.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a crushed raw material sorting apparatus that does not cause clogging and does not need to take measures against vibration.

[Means for Solving the Problems] In the present invention, a vertical rotation shaft is arranged above an upper opening of a hopper, and a plurality of fixing plates are radially attached to the rotation shaft. A plurality of annular slit plates are concentrically fixed to each other to form a rotary slit portion by the annular slit plate, and a plurality of fixed plates extending centripetally with respect to the rotary shaft are attached to the hopper, and the fixed plate is provided with the above-mentioned fixed plate. A fixed slit portion is formed by fixing the plurality of annular slit plates substantially concentrically with the rotary shaft, and the slit plate of the rotary slit portion and the slit plate of the fixed slit portion are arranged in a nested manner. And a plurality of slits are formed in the crushed raw material sorting apparatus.

[Function] Among the crushed raw materials that have been pre-crushed, those with a required particle size or less pass through the slits and fall into the hopper, and coarse-grained materials with a required particle size or more are removed from the hopper by the centrifugal force due to the rotation of the rotary slit section. Is derived to.

Therefore, the particle size of the pulverized raw material is selected.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention, in which a vertically oriented rotary shaft 3 is disposed above an upper opening 2 of a hopper 1, and a plurality of fixed plates 4 extending radially to the rotary shaft 3. The rotary slit portion 6 is formed by attaching a plurality of annular slit plates 5 to the fixed plate 4 at approximately equal intervals to the rotary plate 3 at equal intervals.

Further, a plurality of fixing plates 7 extending centripetally with respect to the rotating shaft 3 are attached to the hopper 1, a plurality of supporting projections 8 are provided on the fixing plate 7 at required intervals, and the supporting projections 8 are connected to the rotating shaft 3. A fixed slit portion 10 is formed by fixing a plurality of annular slit plates 9 substantially concentrically at equal intervals.

A plurality of slits 1 are provided between the annular slit plates 5 and 9 in which the upper edge portions of the annular slit plates 5 and 9 of the rotary slit portion 6 and the fixed slit portion 10 described above are horizontally positioned and nested.
Forming a one.

Incidentally, the casing 13 is arranged so as to surround the hopper 1, and the casing 13 is provided with an input port 14 for introducing the pulverized raw material into the pulverized raw material selecting device 12, and further, the casing 13 and the hopper 1 are provided. There is a sorting path 15 between.

Reference numeral 16 in the figure denotes an outlet of the hopper 1.

Of the pulverized raw materials preliminarily pulverized by the preliminary pulverizer and introduced into the pulverized raw material selection device 12 through the charging port 14, the pulverized raw material having a required particle size or less is slit 1 formed between the annular slit plates 5 and 9.
It passes through 1 and falls into the hopper 1, and the unloading port 1 of the hopper 1
From 6 it is sent to the crusher.

Coarse-grained raw material of a required size or more cannot pass through the slit 11 and remains on the annular slit plates 5 and 9, but the rotary slit portion 6
In accordance with the centrifugal force generated by the rotation of the annular slit plate 5, the annular slit plate 5 gradually moves outward, falls into the sorting path 15, and is returned to the preliminary crushing device again.

Even if the crushed raw material is caught between the slits 11, the crushed raw material is removed from the slits 11 by the rotation of the annular slit plate 9 of the rotary slit portion 6.

Therefore, as described above, the slits 11 of the crushed raw material sorting device 12 are not clogged.

The crushed raw material sorting apparatus of the present invention is not limited to the above-mentioned embodiment, and the slit plate of the rotary slit portion and the slit plate of the fixed slit portion may be arranged upside down. Of course, various changes can be made without departing from the scope of the invention.

[Effects of the Invention] As described above, according to the crushed raw material sorting apparatus of the present invention, it is not necessary to take measures against clogging and vibration like a vibrating screen, and the apparatus has a simpler structure, so that the apparatus can be manufactured at low cost. That is, the excellent effect can be achieved.

[Brief description of drawings]

1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of FIG.
It is a partially expanded sectional view of a II-II section. In the figure, 1 is a hopper, 2 is an upper opening, 3 is a rotary shaft, 4 is a fixed plate, 5 is an annular slit plate, 6 is a rotary slit part, and 7
Is a fixed plate, 9 is an annular slit plate, 10 is a fixed slit portion,
Reference numeral 11 represents a slit, and 12 represents a crushed raw material selection device.

Claims (1)

[Scope of utility model registration request] 1. A vertical rotation shaft is arranged above an upper opening of a hopper, a plurality of fixing plates are radially attached to the rotation shaft, and a plurality of annular slits are formed on the fixing plate substantially concentrically with the rotation shaft. A plate is fixed to form a rotary slit portion by the annular slit plate, and a plurality of fixing plates extending in a concentric manner with respect to the rotating shaft is attached to the hopper, and the fixing plate is substantially concentric with the rotating shaft. A plurality of annular slit plates are fixed to each other to form a fixed slit portion by the annular slit plate, and the slit plate of the rotary slit portion and the slit plate of the fixed slit portion are arranged in a nest to form a plurality of slits. A crushed raw material sorting device characterized by the above.