JP3543150B2 - Vertical mill - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vertical mill for crushing rocks and the like.
[0002]
[Prior art]
Conventionally, a vertical mill for crushing rocks or the like to produce crushed sand or the like is a substantially cylindrical casing erected on a base, and a substantially rectangular reduction gear disposed on the base in the casing in plan view. And a rotary table connected to a vertical output shaft of the speed reducer, the outer periphery of which is disposed in the casing with a gap from the inner periphery of the casing, and the rotary table is disposed in proximity to the outer peripheral portion of the upper surface of the rotary table. It has a plurality of rotatable rollers, and moves the raw material supplied from the upper center of the casing to the central portion on the rotary table via the supply pipe to the outer periphery by centrifugal force generated by rotation of the rotary table. , Crushed by being caught between the roller and the rotary table, the crushed product is dropped from the outer circumference of the rotary table, and housed in an annular chamber having a substantially rectangular cross section formed between the outer circumference of the rotary table and the inner circumference of the casing. did , Raking the scraper mounted on the rotary table to a discharge port formed in a bottom wall of the annular chamber, and is configured to discharge to the outside through a discharge chute which is connected to the outlet.
[0003]
[Problems to be solved by the invention]
However, in the case of conventional vertical mills, although there is no problem when crushing ordinary raw materials, when crushing highly adherent and highly water-soluble raw materials, crushed products adhere to the annular chamber and discharge chute. However, there is a problem that it is difficult to discharge the material outside the machine.
[0004]
Therefore, an object of the present invention is to provide a vertical mill capable of improving the discharge of crushed products outside the machine regardless of the properties of raw materials.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a vertical mill according to the present invention includes a substantially cylindrical casing erected on a base, a substantially rectangular reducer arranged on a base in the casing, and a speed reducer. The rotary table is connected to the vertical output shaft of the machine, and the outer periphery is disposed in the casing with a gap between the inner periphery of the casing and the rotatable table disposed close to the outer periphery of the upper surface of the rotary table. In a vertical mill having a plurality of rollers, a substantially crescent-shaped discharge port which is provided on both sides of a speed reducer in a base in the casing and discharges crushed products, an outer periphery and a deceleration substantially below an intermediate portion of the rotary table. A vertical wall that is arranged between both sides of the machine and the inner circumference of the casing and that divides the inside of the casing along the strings of both outlets at the same height as the reducer. Around the outside Inclined walls forming a chevron extending in up slope to approximately the middle portion of, is erected on the inclined wall, characterized in that it comprises a discharge chute consisting of a cylindrical wall surrounding the outer periphery of the turntable to approximately the middle portion.
[0006]
[Action]
In the above-described vertical mill of the present invention, the crushed product falling in the gap between the outer periphery of the rotary table and the inner periphery of the casing slides down on the substantially chute-shaped discharge chute, and goes out of the machine from the discharge port of the base. Is discharged.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional front view showing an example of an embodiment of a vertical mill according to the present invention. In the drawing, reference numeral 1 denotes a base, on which a truncated conical cylindrical lower casing 2a, a cylindrical upper casing 2b connected to the upper end thereof, and a top plate 2c for closing the upper end of the upper casing 2b. A substantially cylindrical casing 2 is provided upright, and a supply pipe 3 for supplying a raw material is vertically provided in a central portion of a top plate 2 c of the casing 2.
On the base 1 in the casing 2, there is disposed a speed reducer 4 having a substantially rectangular shape in a plan view, which is interlocked with a rotary drive device (not shown). On the other hand, an almost crescent-shaped outlet 5 for discharging the crushed product is provided.
A rotary table 6 whose outer periphery has a required gap with the inner periphery of the casing 2 is connected to a vertical output shaft (not shown) of the speed reducer 4. A disk-shaped table body 6a having a larger diameter than that of the above, and a ring-shaped liner 6b fitted on the outer peripheral portion of the upper surface thereof and having a concave curved surface on which a tire-shaped roller described later can roll with a raw material interposed therebetween. Consists of
On the outer peripheral portion of the upper surface of the turntable 6, a plurality of rotatable tire-shaped rollers mounted on the distal end of an arm 8 whose base is pivotally supported via a horizontal support shaft 7 on the upper casing 2b of the casing 2 9 are arranged close to each other, these rollers 9 are pressed downward through pressing means 10 such as a hydraulic cylinder, and the outer peripheral surface of the roller 9 and the rolling trajectory are moved through a gap adjusting bolt 11. Is provided so that the gap between the liner 6b and the concave curved surface of the liner 6b can be adjusted.
[0008]
On the other hand, between the outer periphery of the rotary table 6 below the substantially middle portion and between both sides of the reduction gear 4 and the inner periphery of the lower casing 2 a of the casing 2, the fall from the outer periphery of the rotary table 6 and the discharge port 5 of the base 1 A substantially chevron-shaped discharge chute 12 serving as a cover for the speed reducer 4 is provided, while the crushed product discharged outside the machine is dropped almost vertically while sliding.
As shown in FIGS. 2 to 5, the discharge chute 12 extends along the strings of both the discharge ports 5 in the base 2, and has a vertical wall 12 a that partitions the inside of the lower casing 2 b at the same height as the speed reducer 4, and both vertical walls. A sloped wall 12b extending upwardly from the upper edge of the rotary table 6 to a substantially middle portion of the outer periphery of the turntable 6 so as to surround the outer periphery of the turntable 6 is formed upright on the inclined wall 12b. It is composed of a cylindrical wall 12c that surrounds the middle part.
[0009]
1 to 5, reference numeral 13 denotes a cutout provided in the lower casing 2a so as to project the input shaft 4a of the speed reducer 4.
[0010]
When the raw material is crushed using the vertical mill having the above configuration, the raw material is supplied from the supply pipe 3 to the center of the rotary table 6 while rotating the rotary table 6 at a required speed.
The raw material supplied to the central portion of the rotary table 6 moves toward the outer periphery along a spiral trajectory on the rotary table 6 due to centrifugal force generated by the rotation of the rotary table 6, and the outer peripheral surface of the roller 9 and the rotary table 6 and is crushed.
The crushed product falling in the gap between the outer periphery of the turntable 6 and the inner periphery of the casing 2 slides down on a substantially chute-shaped discharge chute 12 and is discharged from the discharge port 5 of the base 1 to the outside of the machine.
[0011]
In the above-described embodiment, a case has been described in which the roller 9 has a tire shape and the liner 6b having a concave curved surface is fitted to the outer peripheral portion of the upper surface of the turntable 6, but the present invention is not limited to this. Instead, the rollers may be truncated cones and the upper surface of the rotary table may be flat.
[0012]
【The invention's effect】
As described above, according to the vertical mill of the present invention, the crushed product falling in the gap between the outer periphery of the rotary table and the inner periphery of the casing slides down on the substantially chute-shaped discharge chute, and the Since the raw material is discharged from the discharge port to the outside, the crushed product can be satisfactorily discharged to the outside of the device regardless of whether or not the properties of the raw material are high adhesion and high water content.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional front view showing an example of an embodiment of a vertical mill according to the present invention.
FIG. 2 is a right side view of a lower casing in the vertical mill of FIG.
FIG. 3 is a plan view of a lower casing of FIG. 2;
FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;
FIG. 5 is a sectional view taken along line VV in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Casing 2a Lower casing 4 Reduction gear 5 Discharge port 6 Rotary table 9 Roller 12 Discharge chute 12a Vertical wall 12b Inclined wall 12c Cylindrical wall

Claims (1)

A substantially cylindrical casing erected on the base, a substantially rectangular speed reducer disposed on the base in the casing, and a vertical output shaft of the speed reducer are connected to each other, and the outer periphery is formed inside the casing. In a vertical mill having a rotary table disposed in a casing with a circumference and a gap, and a plurality of rotatable rollers disposed in proximity to an outer peripheral portion of an upper surface of the rotary table, The crescent-shaped discharge port for discharging crushed products is provided on both sides of the speed reducer in the base, and is disposed between the outer circumference substantially below the intermediate portion of the turntable and both sides of the speed reducer and the inner circumference of the casing. A vertical wall that partitions the inside of the casing at the same height as the speed reducer along the strings of both outlets, and extends upward from the upper edges of both vertical walls to almost the middle of the outer periphery of the rotary table so as to surround the outer periphery of the rotary table Do Yamagata Inclined wall, erected on the inclined wall, upright mill, comprising a discharge chute consisting of a cylindrical wall surrounding the outer periphery of the turntable to approximately the middle portion.

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