JPH04200655A - Vertical type grinder - Google Patents

Abstract

PURPOSE:To always hold the inner surface of a chute for introducing a raw material in a clean state during operation and to smoothly supply the raw material by uniformly sliding a spiral sliding body on the inner surface of the chute and removing deposit on the inner surface of the chute. CONSTITUTION:A plurality of pieces of grinding rollers 4 are freely rotatably arranged on the upper face of the outer peripheral surface of a rotating table 3A. A chute 17 for introducing a raw material is vertically hung just above the central part of the table 3A. The raw material is supplied through the chute 17 and ground between the upper surface of the table 3A and the circumferential faces of the rollers 4 by imparting the prescribed grinding pressure to the rollers 4. A spiral sliding body 100b is provided so that it is inserted into the chute 17 and lengthened in the axial direction of the chute 17, and the outer circumference is allowed to abut on the inner surface of the chute 17. A motor 100c is provided to the upper part of the chute 17 as a means for rotating and driving the sliding body 100b. As a result, the inner surface of the chute is always held in a clean state during operation. Smooth supply of the raw material is secured.

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 1] 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. 4. 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 that are swingably supported by a shaft 6 on the casing 1a, and by operating the hydraulic cylinder 9, the crushing roller 4 is 4 is pressed onto the rotary table 3A to apply crushing pressure to the raw material.

3B is a dam ring provided on the outer periphery of the rotary table 3A to adjust the raw material bed pressure, 14 is an annular space passage around the rotary table 3A for blowing up gas, 15 is a hot air blowing passage, and 13 is a raw material pulverized by the blade 13A. 16 is an outlet for taking out the product together with the gas, and 17 is a raw material input shade.

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 and is subjected to a classification action by the blades 13A of the separator 13 located at the top, and products with a predetermined particle size are discharged together with the gas through the discharge port 16.
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 moisture is mixed in the blast furnace slag, the blast furnace slag has self-hardening properties, and this causes the raw material to be input. When entering the vertical crusher via the chute, the temperature of the hot air gas, which is a drying heat source, flowing through the vertical crusher increases the temperature and solidifies while adhering to the inner surface of the raw material input chute, gradually developing into a large size and forming the chute. Since it narrows or blocks the internal passage, it impedes the smooth flow of raw materials.

The vertical crusher of the present invention is intended to remove the deposits on the inner surface of the raw material input chute and keep the inner surface of the chute clean at all times while the crusher continues to operate.

[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, the raw material supplied via the raw material input chute hanging directly above is crushed between the top surface of the rotary table and the peripheral surface of the crushing port by applying a predetermined crushing pressure to the crushing port. A spiral-shaped sliding body is fitted in the input chute, extends in the axial direction of the raw material input chute, and has an outer periphery in contact with the inner surface of the raw material input chute. The configuration was such that it was placed at the top.

[Function] In the vertical crusher of the present invention, a spiral-shaped sliding body that slides and rotates on the inner surface of the raw material input chute is provided in a form extending in the axial direction, and a rotational drive means is provided. The rotation of the sliding member causes the sliding member to rotate in contact with almost the entire inner circumferential surface of the raw material inputting chute, so that the deposits attached to the inner surface of the chute are sheared and destroyed by the sliding member and peeled off.

Therefore, the inner surface of the chute is always kept clean and smooth supply of raw materials is ensured.

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

Figures 1 to 3 relate to embodiments of the present invention; Figure 1 is an overall vertical sectional view of a vertical crusher, Figure 2 is a cross-sectional plan view taken from Figure 1 - ■, and Figure 3 is a FIG. 3 is a perspective view of a main part of a sliding body.

In the figure, 1 is a vertical crusher, 2 is a speed reducer, 2A is an electric motor, 3A is a rotary table, 3B is a dam ring, 4 is a crushing roller, 5 is an arm, 6 is a shaft, 7 is an arm, 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 an outlet, and 17 is a raw material input chute; The structure and operation are as described in the prior art.

Next, the cleaning device 100 for the raw material input chute of the vertical crusher 1 of the present invention will be explained.

As shown in FIGS. 1 to 3, the cleaning device 100 is connected to a rotary shaft 100a that hangs down from a casing 52 of a belt conveyor 50 for transporting raw materials toward the center axis of a raw material input chute 17. A spiral-shaped sliding member 100 is fitted into the raw material input chute 17 and extends vertically downward, the outer periphery of which comes into contact with the inner surface of the raw material input chute 17.
b, and an electric motor 100c that is connected to the rotating shaft 100a and rotationally drives the rotating shaft 100a and the sliding member 100b. The spiral sliding member 100b may be made of round steel, pipe, or plastic with good wear resistance.

The rotating direction of the sliding member 100b is a right-handed thread direction (clockwise) when the spiral of the sliding member 100b is a right-handed thread;
It is common for the outer periphery of the rotating sliding member 100b to rotate in a direction in which it slides from top to bottom on the inner surface of the raw material input chute, but depending on the nature of the deposit, it is better to slide it from bottom to top to prevent it from falling off. It rotates in the opposite direction (counterclockwise) for raw materials.

[Effects of the Invention] As described above, in the vertical crusher of the present invention, the spiral-shaped sliding body evenly slides on the inner surface of the raw material input chute and removes deposits on the inner surface of the chute. The inner surface is kept clean during operation, ensuring smooth raw material supply.

[Brief explanation of the drawing]

Figures 1 to 3 relate to embodiments of the present invention; Figure 1 is an overall vertical sectional view of a vertical crusher, Figure 2 is a cross-sectional plan view taken from Figure 1 - ■, and Figure 3 is a FIG. 3 is a perspective view of a main part of a sliding body. FIG. 4 is an overall vertical sectional view of a conventional vertical crusher. 1... Vertical crusher, 2...-
...Reducer, 3A...Rotary table, 4...
...... Grinding roller, 17...... Raw material input chute, 50... Belt conveyor, 52... Casing, 100. ...
...Cleaning device, 100a... Rotating shaft, 100b
...Sliding body, 100c...Electric motor. Patent applicant: Ube Industries, Ltd. Figure 1 Figure 2 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 material supplied via the raw material input chute hanging directly above the center of the rotary table is applied to the crushing rollers with a predetermined crushing pressure. In a vertical crusher that grinds between the upper surface of a rotary table and the circumferential surface of a crushing roller, the material is fitted into the raw material input chute, extends in the axial direction of the raw material input chute, and has an outer periphery that touches the inner surface of the raw material input chute. A vertical crusher in which a spiral-shaped sliding body is arranged in contact with the sliding body, and a means for driving the rotation of the sliding body is provided at the upper part of the raw material input chute.