JPH04171052A - Vertical grinder - Google Patents

Abstract

PURPOSE:To hold the inner surface of a raw material charging chute in a clean state by removing the raw material adhering to the inner surface of the chute by providing a cleaning device for removing the material adhering to the inner surface of the raw material charging chute to the center part of a turntable during the stop time of a vertical grinder and providing a hydraulic cylinder, an electromotor and a plurality of cutters to the cleaning device. CONSTITUTION:A cleaning device 100 is constituted of a hydraulic cylinder 110, an electromotor 120, a rotary shaft 130 and cutters 140 and the electromotor 120 whose output shaft is set in a vertical upward direction is fixed to the leading end of the piston rod 110a of the upright hydraulic cylinder 110, and the cutters 140 are attached to the rotary shaft 130 of the electromotor 120 in a multistage fashion. When a current is supplied to the electromotor 120 and the hydraulic cylinder 110 is driven forwardly, the cutters 140 gradually rise under rotation to enter a raw material charging chute 17 along the inner surface thereof to cut and remove the material 50 adhering to the inner surface of the chute and the material 50 is removed to clean the inner surface of the chute.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides the following advantages:
This relates to a vertical crusher that crushes raw materials such as limestone, blast furnace slag, and cement raw materials.

[Prior Art] As a type of pulverizer that finely pulverizes raw materials such as limestone, blast furnace slag, and cement raw materials into powder, there is a vertical pulverizer equipped with a rotary table and pulverizing rollers, as shown in Fig. 3. 1 is widely used.

This type of crusher includes a disc-shaped rotary table 3A that is driven by a motor 2A and a reducer 2 to rotate at a low speed in the lower part of a cylindrical casing 1a, and a hydraulic pressure installed at a portion that equally divides the outer periphery of the upper surface in the circumferential direction. The crushing roller 4 is provided with a plurality of crushing rollers 4 that are pressed against each other and rotated as a result of rotation.

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 the casing 1a, and by operating the hydraulic cylinder 9, The crushing roller 4 is pressed onto the rotary table 3A to apply crushing pressure to the raw material.

Further, as shown in FIG. 4, a bearing 8a that supports the shaft 6 and a bearing housing 8 that houses the bearing 8a are fixedly installed on the upper surface of the pedestal 20. 3B is a dam ring provided on the outer peripheral edge of the rotary table 3A to adjust the raw material layer pressure; 14 is an annular space passage for blowing up gas around the rotary table 3A; 15
13 is a rotary separator for classifying the raw material crushed by the blades 13A, 16 is an outlet for taking out the product together with the 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 input chute 17 receives centrifugal force in the radial direction of the table due to the rotation of the rotary table 3A, and slides on the rotary table 3A. rotary table 3
It receives a rotational force from A, slides between it and the rotary table 3A, and rotates 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 force in the rotational direction are combined, and the raw material moves to the outer circumference of the rotary table 3A while drawing a spiral trajectory on the rotary table 3A. Since a roller is in pressure contact with this outer circumferential portion and rotates, the raw material drawing a spiral line enters between the crushing roller 4 and the rotary table 3A from a direction forming a certain angle with the roller axial direction and is bitten. crushed.

On the other hand, air is supplied to the base of the casing 1a by a duct.
Alternatively, gas such as hot air is introduced, and as this gas blows 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, the crushed fine powder is entrained in the gas. The product rises inside the casing 1a, is subjected to a classification action by the blades 13A of the separator 13 located at the upper part, and products with a predetermined particle size are discharged to the discharge port 16 along with the gas.
is discharged from the tank and sent to the next process.

[Problems to be Solved by the Invention] When grinding blast furnace slag, for example, in the conventional vertical crusher as described above, when the blast furnace slag contains moisture, the blast furnace slag has self-hardening properties, and this When entering the vertical pulverizer through the pulverizer, it adheres to and solidifies on the inner surface of the raw material input chute, which is heated by the hot air gas that is the drying heat source flowing inside the vertical pulverizer, and gradually develops into a passageway in the chute. This narrows or obstructs the flow of raw materials, hindering the smooth supply of raw materials.

The vertical crusher of the present invention is intended to remove raw materials adhering to the inner surface of the raw material input chute and maintain the inner surface in a clean state.

[Means for Solving the Problems] In order to solve the above problems, the vertical crusher of the present invention has a plurality of rotatable crushing rollers disposed on the upper surface of the outer periphery of the rotary table, and In a vertical crusher that crushes the raw material supplied via the raw material input chute that hangs directly above it between the circumferential surface of the crushing roller, the raw material input chute is installed upright in the center of the rotary table when the vertical crusher is not in operation. The cleaning device includes a hydraulic cylinder in which a piston rod extends and retracts vertically upward, an electric motor having a rotating shaft fixed to the tip of the piston rod and protruding vertically upward, and a hydraulic cylinder in which a piston rod extends and contracts vertically upward. The structure includes a plurality of cutters fixedly attached to a shaft, protruding radially in the radial direction, and arranged in multiple stages in the axial direction.

[Function] The vertical crusher of the present invention has a multistage crusher attached to a rotating shaft that projects vertically upward from an electric motor fixed to the tip of a piston rod of a hydraulic cylinder when the vertical crusher is not in operation. A cleaning device consisting of a plurality of cutters is fixedly attached to the center of the rotary table, and the cutters that rise and rotate are fitted on the inner surface of the raw material input chute to cut and remove deposits on the inner surface of the chute.

[Example] Embodiments of the present invention will be described below based on the drawings.

1 and 2 relate to an embodiment of the present invention, in which FIG. 1 is a vertical sectional view of a main part of a vertical crusher, and FIG. 2 is a plan view taken along line nn in FIG. 1.

FIG. 1 shows a state in which the cleaning device 100 is installed at the center of the rotary table 3A directly below the raw material input chute 17 when the rotary table 3A is not in operation. The cleaning device 100 includes a hydraulic cylinder 110. Electric motor 1
209, a rotating shaft 130 and a cutter 140,
Piston rod 110a of upright hydraulic cylinder 110
A motor 120 with an output shaft facing vertically upward is fixed at the tip of the motor 120, and cutters 140 are mounted in multiple stages (three stages in the embodiment shown in FIG. 1) on the rotary shaft 130 of the motor 120. constitutes the cutting edge.

FIG. 2 shows the planar shape of the cutter 140, and in the illustrated embodiment, four cutters 140 are fixedly attached to the rotating shaft 130 via bosses 140a in a radial manner. The outer diameter of the cutter 140 may be the same at each stage, but when used for cleaning work where there is a large amount of deposits, the upper diameter may be smaller and the outer diameter may be increased in stages. 12
0a is a protective cover for the electric motor 120.

Next, the operation of the cleaning device 100 will be explained. When the cleaning device 100 is not in operation, it is in the state shown in FIG. The material 50 that has entered the inner surface of the material inputting chute 17 and is stuck to the inner surface is cut off, the material 50 is peeled off, and the inner surface of the chute is cleaned.

In the present invention, a hydraulic cylinder is used as a means for raising and lowering the cutter 140, but a pneumatic cylinder, an electric cylinder,
Or use Jyatsuki etc.

[Effect of the invention] As explained above, in the vertical crusher of the present invention,
The vertical crusher is designed with a cleaning device that has a cutter that rotates and rises inside the raw material input chute when the vertical crusher is not in operation, so that the debris inside the raw material input chute is automatically peeled off and removed in a continuous operation. The equipment can be cleaned to almost its normal state before operation.

[Brief explanation of drawings]

Figures 1 and 2 show embodiments of the present invention, with Figure 1 being a vertical cross-sectional view of the main parts, Figure 2 being a plan view taken along the line ■-■ in Figure 1, and Figures 3~
FIG. 4 shows an embodiment of a conventional vertical crusher, FIG. 3 is an overall vertical sectional view, and FIG. 4 is a side view taken along TV-IV in FIG. 3. 1... Vertical crusher, 2... Speed reducer,
3A...Rotary table, 4...Crushing roller,
5... Arm, 6... Axis, 7
...Arm, 8...Bearing housing, 8a...Bearing, 17...Raw material input chute, 50...Adherence, 100...Cleaning Device, 110... Hydraulic cylinder, 120... Electric motor, 120a... Protective cover,
130...Rotary axis, 140...Cutter. Patent applicant: Ube Industries, Ltd. Figure 3 Figure 4

Claims (1)

[Claims] (1) A plurality of rotatable crushing rollers are arranged on the upper surface of the outer periphery of the rotary table, and the raw materials supplied via the raw material input chute that hangs directly above the center of the rotary table are crushed between them and the peripheral surface of the crushing rollers. The vertical crusher is equipped with a cleaning device that removes deposits from the inner surface of the raw material input chute, which is installed in the center of the rotary table when the vertical crusher is not in operation. an electric motor having a rotating shaft fixed to the tip of the piston rod and projecting vertically upward; and a plurality of cutters fixed to the rotating shaft and projecting radially in the radial direction and arranged in multiple stages in the axial direction. A vertical crusher consisting of.