JPH057786A - Vertical crushing device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a vertical crusher that can easily change the dam ring height without stopping operation when changing the raw material layer thickness on the rotary table according to changes in crushing conditions. To do. [Structure] Dam ring 3B at the outer edge of the rotary table 3A
A ring-shaped or a plurality of arc-shaped dam plates 30 are movably arranged on the outer side of the above in the vicinity of the dam ring 3B, and an elevating means 40 for the dam plates 30 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical crusher for crushing raw materials such as cement raw materials, slag, clinker, ceramics, chemicals, etc. by cooperation of a rotary table and a pulverizing roller, and particularly for pre-milling. The present invention relates to a vertical crusher which requires a relatively high raw material layer thickness on a rotary table such as a mill.

[0002]

2. Description of the Related Art As a kind of pulverizer for pulverizing raw materials such as limestone, slag, and cement raw materials into fine powders, a vertical pulverizer 1 having a rotary table and pulverizing rollers is widely used as shown in FIG. It is used. This type of crusher has a disk-shaped rotary table 3A that is driven by a speed reducer 2 by a motor 2A and rotates at a low speed in a lower portion of a cylindrical casing 15, and a hydraulic pressure is applied to a portion that equally divides an outer peripheral portion of an upper surface thereof in a circumferential direction. A plurality of crushing rollers 4 that are pressed against each other and rotate by rotation
It has and.

The crushing roller 4 is connected to a piston rod 10 of a hydraulic cylinder 9 via an arm 5 and an arm 7 which are pivotally supported by a shaft 15 by a shaft 6, and by operating the hydraulic cylinder 9, The crushing roller 4 is pressed against the rotary table 3A to apply crushing pressure to the raw material. 3B is a dam ring provided on the outer peripheral edge of the rotary table 3A for adjusting the raw material layer thickness, 14 is a gas blowing annular space passage around the rotary table 3A, 14A is a gas supply passage, and 13 is a raw material crushed by blades 13A. A rotary separator for classification, 16 is an outlet for taking out a product together with gas, and 17 is a raw material charging chute.

In such a vertical crusher, the raw material supplied to the central portion of the rotary table by the raw material feeding chute 17 receives the centrifugal force in the radial direction of the rotary table 3A and slides on the rotary table 3A. At times, the rotary table 3A receives a force in the rotation direction, and the rotary table 3A
It slides with A and performs a rotation somewhat slower than the rotation speed of the rotary table 3A. The above two forces, that is, the radial direction force and the rotational direction force are combined, and the raw material is the rotary table 3.
A spiral locus is drawn on A to move to the outer peripheral portion of the rotary table 3A. Since the roller is pressed against the outer periphery and is rotating, the raw material in which the spiral is drawn enters the crushing roller 4 and the rotary table 3A from a direction forming an angle with the roller axial direction and is bitten. It is crushed and crushed.

On the other hand, at the base of the casing 15, gas such as air or hot air is introduced by a duct,
This gas blows up from the annular space portion 14 between the outer peripheral surface of the rotary table 3A and the inner peripheral surface of the casing, so that the pulverized fine powder is entrained in the gas and the casing 1
5, the blade 1 of the separator 13 that is located in the upper part
The product having a predetermined particle size is subjected to the classification action by 3A and is discharged together with the gas from the discharge port 16 and sent to the next step.

[0006]

As described above, in the operation of the vertical crusher, the rotary table 3A is moved by the height of the dam ring 3B protruding at the outer edge of the rotary table.
The upper raw material layer thickness is regulated. This raw material layer thickness is a particularly important crushing factor in mill operation, and the optimum value must be appropriately selected by grasping the optimum value from the operating experience in correlation with the raw material type, raw material supply amount, product particle size, and crushing pressure. I won't.
However, in the conventional vertical crusher, as shown in FIG.
To adjust the raw material layer thickness, in other words, to adjust the height of the dam ring 3B, the operation of the crusher was stopped, an operator entered the inside of the crusher, and the combination of dam adjusting plates with different thicknesses was changed. I fixed it with bolts, but for this work 3
It took ~ 5 hours. In addition, in a crusher that performs dry crushing, hot air of high temperature (200 to 500 ° C) is supplied to the inside of the mill as a dry heat source during operation, and the cooling time is required for workers to enter the inside after stopping operation. As a result, a waiting time of several hours was required, which significantly impeded productivity.

[0007]

In order to solve the above-mentioned problems, the vertical crusher of the present invention has a plurality of rotatable crushing rollers arranged on the upper surface of the outer periphery of the rotary table, and the center of the rotary table. In a vertical pulverizer for pulverizing the supplied raw material between the upper surface of the rotary table and the peripheral surface of the pulverizing roller by applying a predetermined pulverizing pressure to the pulverizing roller, the dam ring is provided outside the dam ring at the outer edge of the rotary table. A ring-shaped or a plurality of arc-shaped dam plates are arranged in the vicinity of, and the elevating means of the dam plates is arranged in the casing of the vertical crusher.

[0008]

In the vertical crusher of the present invention, an annular or a plurality of arc-shaped dam plates are provided on the outside of the dam ring so as to be vertically movable. Therefore, when it is desired to change the raw material layer thickness, the dam plate can be operated. By moving up and down to change the height, a desired raw material layer thickness can be formed.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 3 relate to an embodiment of a vertical crusher of the present invention, FIG. 1 is a longitudinal sectional view of a main part, FIG. 2 is a plan view, and FIG.
FIG. 8 is a longitudinal sectional view of a main part showing another embodiment.

As shown in FIGS. 1 and 2, the dam ring 3A
On the outer side of the outer edge of the dam ring 3B, an annular dam plate 30 divided into four parts is arranged in the vicinity of the dam ring 3A, and penetrates through the perforated hole of the casing 15 on the outer side thereof. It is connected to the pair of left and right arms 30a, 30a which are extended. The arm 30a is connected to the vertical elevating means 40 of the dam plate 30 on the outside. The elevating means 40 includes a nut 40a connected to the arm 30a, a rotating shaft 40b screwed on the nut 40a, a pair of upper and lower bearings 40c and 40c fixedly mounted on the casing 15, and a handle 40.
d and a seal cover 40e. Now, by rotating the handle 40d in the state shown in FIG. 1, the male screw provided on the rotating shaft 40b and the nut 40a screwed to the male screw
Due to the action of the female screw, the nut 40b and the arm 30a and the dam plate 30 connected thereto move up and down. The seal cover 40e is a seal material that seals the through hole of the casing 15, and uses rubber or synthetic resin having elasticity.

FIG. 3 shows another embodiment of the lifting means. The lifting means 50 uses a hydraulic cylinder 50a, the tip of a piston rod 50b is passed through the arm 30a, and the nut 50 is used.
c and 50c. Although a small clearance of, for example, about 5 to 10 mm is used as the gap between the outer peripheral surface of the dam ring 3B and the inner peripheral surface of the dam plate 30 in FIG. 1, it is possible to prevent the raw material overflowing the dam ring 3B from falling. Therefore, in order to prevent this, as shown in FIG. 3, the upper end of the dam plate 30 is bent inward to cover the dam ring 3B. The dam plate 30 may be an integral annular body instead of being divided into a plurality of circumferences as in the present embodiment.

As described above, the dam plate of the present invention employs a mechanism capable of arbitrarily adjusting the height thereof during operation irrespective of the movement of the rotating rotary table 3A, so that the operation is stopped. The thickness of the raw material layer can be easily changed according to changes in the pulverization conditions.

[0013]

As described above, in the vertical crusher of the present invention, since the annular or plural arc-shaped dam plates are provided on the outer side of the dam ring so as to be able to move up and down, the crushing conditions can be changed. Accordingly, the thickness of the raw material layer can be changed to an arbitrary value without stopping operation during operation. Therefore, it is possible to improve the maintainability and productivity.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of a vertical crusher of the present invention.

FIG. 2 is a plan view showing an embodiment of a vertical crusher of the present invention.

FIG. 3 is a longitudinal sectional view of a main part showing another embodiment of the vertical crusher of the present invention.

FIG. 4 is an overall vertical sectional view of a conventional vertical crusher.

[Explanation of symbols]

 1 Vertical Grinding Machine 3A Rotary Table 3B Dam Ring 4 Grinding Roller 15 Casing 30 Dam Plate 30a Arm 40 Lifting Means 40a Nut 40b Rotating Shaft 40c Bearing 40d Handle 40e Seal Cover 50 Lifting Means 50a Hydraulic Cylinder 50b Piston Rod 50c Seal Nut 50d

Claims (1)

Claim: What is claimed is: 1. A plurality of rotatable crushing rollers are arranged on the upper surface of the outer periphery of a rotary table, and the raw material supplied to the center of the rotary table is rotated by applying a predetermined crushing pressure to the crushing roller. A vertical crusher for crushing a raw material between an upper surface of a table and a peripheral surface of a crushing roller, wherein a circular or a plurality of arc-shaped dam plates are provided outside the dam ring at the outer edge of the rotary table and adjacent to the dam ring. And a means for raising and lowering the dam plate is arranged in the casing of the vertical crusher.