JP2663305B2 - Vertical crusher - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vertical pulverizer for pulverizing raw materials such as limestone, blast furnace slag, and cement raw material by cooperation of a rotary table and a pulverizing roller. .

[Prior Art] As one type of a crusher for finely pulverizing raw materials such as limestone, blast furnace slag, and cement raw material into powder, as shown in FIG. 6, a vertical crusher provided with a rotary table and crushing rollers. 1 is widely used. This type of crusher includes a disk-shaped rotary table 3A that is driven by a motor 2A by a speed reducer 2 and rotates at a low speed in a lower part of a cylindrical casing 1a, 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. And a plurality of crushing rollers 4 that are driven to rotate by being pressed by the like.

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 swingably supported by a shaft 6 on a casing 1a. 4 is pressed onto the rotary table 3A to give a pulverizing pressure to the raw material. As shown in FIG. 7, a bearing 8a for supporting the shaft 6 and a bearing housing 8 for housing the bearing 8a are fixed to the upper surface of the gantry 20. 3B is a dam ring provided on the outer peripheral edge of the rotary table 3A to adjust the layer pressure of the raw material, 14 is an annular space passage around the rotary table 3A for gas blowing, 15 is a hot air blowing passage, 13
Is a rotary separator for classifying the raw material pulverized by the blades 13A, 16 is an outlet for taking out a product together with gas, and 17 is a raw material input chute.

In such a vertical crusher, the raw material supplied to the center of the rotary table 3A by the raw material charging chute 17 receives centrifugal force in the table radial direction due to the rotation of the rotary table 3A and slides on the rotary table 3A. The rotary table 3A receives a force in the rotation direction, and slides between the rotary table 3A and performs a rotation somewhat slower than the rotation speed of the rotary table 3A.
The above two forces, that is, the forces in the radial direction and the rotational direction are combined, and the raw material moves on the turntable 3A to the outer periphery of the turntable 3A along a spiral trajectory. Since a roller is pressed against this outer peripheral portion and rotated, the raw material describing the spiral enters the grinding roller 4 and the rotary table 3A from a direction that forms an angle with the roller axis direction and bites. Rarely crushed.

On the other hand, air is applied to the base of the casing 1a by a duct,
Alternatively, gas such as hot air is introduced, and the gas is blown up from the annular space passage 14 between the outer peripheral surface of the rotary table 3A and the inner peripheral surface of the casing, so that the crushed fine powder is entrained by the gas. As a result, the product having a predetermined particle size is discharged from the outlet 16 together with the gas and sent to the next step.

[Problem to be solved by the invention] In the conventional vertical pulverizer as described above, for example,
When pulverizing blast furnace slag, etc., when blast furnace slag is mixed with moisture, blast furnace slag has self-hardening properties. The hot air gas, which has been heated by the hot air gas, adheres and solidifies on the inner surface of the raw material charging chute, gradually develops and narrows or closes the passage in the chute, thereby impeding the smooth supply of the raw material.

The vertical pulverizer of the present invention is for removing the raw material adhering to the inner surface of such a raw material charging chute and keeping the inner surface in a clean state without stopping the operation of the pulverizer.

[Means for Solving the Problems] In order to solve the above-mentioned problems, a vertical pulverizer of the present invention comprises a plurality of rotatable pulverizing rollers disposed on an upper surface of an outer peripheral portion of a rotary table, and a central portion of the rotary table. In a vertical pulverizer in which a raw material supplied via a raw material input chute hanging directly above is given a predetermined pulverizing pressure to a pulverizing roller and pulverized between the upper surface of the rotary table and the peripheral surface of the pulverizing roller, A thrust bearing is arranged on the upper surface of the upper flange,
A rotary cylinder is provided which is rotatably mounted on the thrust bearing and fitted in the raw material charging chute, and which is rotatable. And a plurality of cutters arranged at substantially equal pitches in the circumferential direction and extending in the up-down direction, and provided with rotation driving means for the rotary cylinder.

[Operation] In the vertical pulverizer of the present invention, the rotating cylinder having the cutters arranged at substantially equal pitches in the circumferential direction in the longitudinal direction is rotatably provided inside the raw material charging chute. The kimono is sheared and broken by the cutter rotating along the inner surface of the chute, and is peeled off, so that the inner surface of the chute can be always kept in a clean state. A continuous operation or an intermittent operation can be selected for the rotary cylinder according to the degree of deposition of the raw material.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 5 relate to an embodiment of the present invention, FIG. 1 is an overall vertical sectional view of a vertical crusher, FIG.
FIG. 3 is a plan view taken along the line III-III of FIG. 2, and FIG.
FIG. 5 is an exploded side view of the rotary cylinder, as viewed in a sectional view taken along the line IV.

In the figure, 1 is a vertical pulverizer, 2 is a speed reducer, 2A is an electric motor, 3A is a rotary table, 3B is a dam ring, 4 is a pulverizing roller, 5 is an arm, 6 is a shaft, 7 is an arm, and 8 is a bearing housing. , 8a is a bearing, 9 is a hydraulic cylinder, 10 is a piston rod, 13 is a separator, 13A is a separator blade, 14 is an annular space passage, 15 is a hot air blowing passage, 16 is a discharge port, and 17 is a material input chute. The structure and operation are as described in the prior art.

Reference numeral 100 denotes a rotary cylinder, which is located between the upper cylinder 100a formed by a flange and a cylinder at the upper end, the lower cylinder 100c at the lower end, and the same pitch in the circumferential direction as shown in FIG. And the axially elongated cutter 100b formed as one body. The cutter 100b is made of steel or hard plastic, and may have a rectangular cross section, an arbitrary shape such as an isosceles triangle or a circle.

The rotary cylinder 100 is mounted on a thrust bearing 110 (which may be a radial bearing) disposed on the upper surface of the upper end flange of the raw material charging chute 17, and is rotatably disposed. A gear 102 is fixed on the outer periphery of the upper end flange of the rotating cylinder 100,
It is driven to rotate by meshing with a gear 122 attached to a rotating shaft of the electric motor 120.

By operating the rotary cylinder 100 of the present invention continuously or intermittently for about 5 minutes every hour, the deposits on the inner surface of the raw material charging chute 17 can be easily removed by shearing along the inner surface of the cutter 100b. To keep the inner surface of the chute clean. It should be noted that the attached matter adhered to the inner surface or the side surface of the cutter 100b does not largely generate and develop since the detachment and detachment is caused by the rotating operation of the cutter 100b.

Although a gear transmission is used as the rotation driving means of the rotary cylinder 100, any means such as a chain drive or a V-belt drive can be used.

[Effects of the Invention] As described above, in the vertical pulverizer of the present invention, the deposits on the inner surface of the material input chute are produced by the rotating action of the rotary cylinder having the plurality of cutters rotating along the inner surface of the material input chute. Can be easily and automatically peeled off, so that the inner surface of the chute can be kept clean and a smooth supply of the raw material can be secured.

[Brief description of the drawings]

1 to 5 relate to an embodiment of the present invention. FIG. 1 is an overall vertical sectional view of a vertical crusher, FIG. 2 is an enlarged vertical sectional view of a main part, and FIG. Fig. 4 is a plan view as viewed in III, and Fig. 4 is IV-
FIG. 5 is an exploded side view of the rotary cylinder. 6 and 7 show a conventional embodiment, FIG. 6 is an overall vertical sectional view, and FIG. 7 is a side view as viewed in FIG. 6 VII-VII. 1 vertical crusher, 2 speed reducer, 3A rotary table, 4 crushing roller, 17 material feed chute, 100 rotary cylinder, 100a upper cylinder, 100b cutter, 100c: Lower cylinder, 102: Gear, 110: Thrust bearing, 120: Electric motor, 122: Gear.

Claims (1)

(57) [Claims] A plurality of rotatable crushing rollers are disposed on the upper surface of an outer peripheral portion of a rotary table, and a raw material supplied via a raw material charging chute hanging directly above a central portion of the rotary table is supplied to a crushing roller at a predetermined crushing pressure. A thrust bearing is disposed on the upper surface of the upper end flange of the raw material charging chute, and the raw material is mounted on the thrust bearing and the raw material is charged. A rotatable rotary cylinder fitted in the chute and rotatable is provided. The rotary cylinder is connected at upper and lower ends to an upper cylinder and a lower cylinder having an upper flange and both cylinders, and are arranged at a substantially equal pitch in a circumferential direction. A vertical pulverizer, comprising: a plurality of cutters extending in a vertical direction; and a rotary driving means for the rotary cylinder.