JP2897408B2 - 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. 3, 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. 4, a bearing 8a for supporting the shaft 6 and a bearing housing 8 for accommodating 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 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 grinding blast furnace slag, etc., when blast furnace slag is mixed with moisture, the blast furnace slag has self-hardening properties, and when it enters the vertical crusher via the raw material input chute, the dry heat source flowing through the vertical crusher 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 problems, the vertical pulverizer of the present invention comprises: (1) a plurality of rotatable pulverizing rollers arranged on an upper surface of an outer peripheral portion of a rotary table; In a vertical pulverizer in which a raw material supplied via a raw material input chute hanging just above the rotary table 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 rake in which a concentrically rotatable eccentric rotating shaft is suspended from directly above the raw material charging chute in the raw material charging chute, and a brush for sweeping the inner surface of the raw material charging chute in multiple horizontal stages is provided on the eccentric rotary shaft. And an electric motor for rotationally driving the eccentric rotary shaft.

(2) A plurality of rotatable pulverizing rollers are arranged on the upper surface of the outer peripheral portion of the rotary table, and a predetermined pulverizing pressure is applied to the pulverizing roller by supplying the raw material supplied via the raw material charging chute hanging directly above the center of the rotary table. A vertical crusher for crushing between the upper surface of the rotary table and the peripheral surface of the crushing roller, wherein an eccentric rotating shaft rotatable concentrically in the raw material charging chute is provided directly above the raw material charging chute; Brushes for sweeping the inner surface of the raw material charging chute are provided on the rotating shaft in multiple stages, and an electric motor for rotating the eccentric rotating shaft is provided.

[Operation] In the vertical pulverizer of the present invention, an eccentric rotary shaft in which rakes with brushes are arranged horizontally in multiple stages from the top or eccentric in which brushes are directly implanted in upper and lower stages in the raw material charging chute. Since the rotating shaft is hung down and an electric motor for driving the eccentric rotating shaft is provided, the brush implanted on the rake by the driving of the electric motor or the brush directly implanted on the eccentric rotating shaft has the inner surface of the material input chute. Sweep and clean along. Therefore, even if a part of the raw material adheres to the inner surface of the chute, the raw material can be easily separated and separated. The electric motor can be driven continuously or intermittently according to the state of deposits.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an overall vertical sectional view of a vertical pulverizer provided with a rotary rake on which the present invention is based. FIG. 2 is an enlarged longitudinal sectional view of a main part, and FIG. 2 (a) shows a case where a plate-shaped rake is mounted on an eccentric rotary shaft which is a basis of the present invention, and FIG. 2 (b)
FIG. 2C shows a case where a wire brush or a plastic brush is implanted on a steel rake mounted on an eccentric rotary shaft according to an embodiment of the present invention. FIG. 2C shows an eccentric rotary shaft according to another embodiment of the present invention. 1 shows a case in which a wire brush or a plastic brush is directly implanted.

First, based on FIG. 1, a vertical pulverizer having a cleaning device for a raw material charging chute, which is formed by directly mounting only a rake on an eccentric rotating shaft, which is the basis of the present invention made in the process leading to the present invention. Will be described. In FIG. 1, the configuration of the cleaning device other than the rake constitutes an embodiment of the present invention.

In FIG. 1, 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 crush roller, 5 is an arm, 6 is a shaft, 7 is an arm, and 8 is 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 blow-up passage, 16 is a discharge port, and 17 is a material input chute. , Its structure and operation are as described in the prior art.

Reference numeral 100 denotes a cleaning device for removing deposits on the inner surface of the raw material charging chute and cleaning the inner surface of the raw material chute. As shown in FIG. Eccentric rotating shaft 110 that hangs down and eccentric on the way
And a plurality of steel or plastic plate-shaped rakes 120 protruding in the radial direction in a horizontal and multi-stage manner on the eccentric rotating shaft 110.
And an electric motor 130 which is a rotation driving means of the eccentric rotation shaft 110. The rake 120 horizontally sweeps and cleans the inner surface of the raw material charging chute by the rotation of the electric motor 130.

Thus, the cleaning device according to the invention is configured as shown in detail in FIGS. 2 (b) and 2 (c). Second
In the embodiment shown in FIG. 2B, wire brushes 120a or plastic brushes 120a are respectively implanted at ends of a plurality of steel rakes 120 protruding in the radial direction in multiple stages horizontally and eccentrically to the rotating shaft 110. Have been. In the embodiment shown in FIG. 2 (c), a brush 120a made of wire or plastic is directly implanted on the eccentric rotary shaft 110 in multiple vertical stages.

During the operation of the crusher 1, the cleaning device 100 according to the embodiment of the present invention is operated continuously or intermittently for about 5 minutes every hour, so that the deposits on the inner surface of the material input chute 17 can be easily brushed. The rake 120 that has been implanted or the brush that has been implanted on the eccentric rotary shaft is peeled off along the inner surface of the chute by a sweeping action or a shearing action, thereby keeping the inner surface of the chute clean. It should be noted that the attached matter attached to the side surface of the rake does not largely form and develop since the rake rotates and separates.

[Effects of the Invention] As described above, in the vertical pulverizer of the present invention, a rake having a plurality of brushes planted thereon, or a brush planted on an eccentric rotating shaft, rotating along the inner surface of the raw material charging chute, Can automatically operate the cleaning device equipped with
Further, the chute can be easily peeled off, the inner surface of the chute is kept clean, a smooth supply of the raw material is secured, and a stable operation of the vertical crusher can be performed.

[Brief description of the drawings]

FIG. 1 is an overall vertical sectional view of a vertical pulverizer provided with a rotary rake on which the present invention is based. FIG. 2 (a) is a partially enlarged cross-sectional view showing a case where a plate-shaped rake is attached to an eccentric rotary shaft which is the basis of the present invention, and FIG. 2 (b) is a rake having brushes implanted on the eccentric rotary shaft. FIG. 2 (c) is a partially enlarged longitudinal sectional view showing an embodiment in which a brush is directly implanted on an eccentric rotary shaft.
3 and 4 show a conventional embodiment, FIG. 3 is an overall longitudinal sectional view, and FIG. 4 is a side view as viewed from IV-IV in FIG. 1 ... vertical grinding machine, 2 ... reduction gear, 3A ... rotary table, 4 ... grinding roller, 17 ... material input chute, 100
…… Cleaning device, 110… Eccentric rotating shaft, 120… Rake, 12
0a: Wire brush (or plastic brush),
130 …… Electric motor.

Claims (2)

(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. Crushing between the upper surface of the rotary table and the peripheral surface of the crushing roller by providing a eccentric rotating shaft that is rotatable concentrically in the raw material charging chute directly above the raw material charging chute. A vertical rake provided with a rake in which brushes for sweeping the inner surface of the raw material charging chute are arranged on the eccentric rotary shaft in multiple horizontal stages and an electric motor for rotationally driving the eccentric rotary shaft is provided. Crusher. 2. 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 just above the center of the rotary table is supplied to a crushing roller at a predetermined crushing pressure. Crushing between the upper surface of the rotary table and the peripheral surface of the crushing roller by providing a eccentric rotating shaft that is rotatable concentrically in the raw material charging chute directly above the raw material charging chute. A vertical grinding machine comprising: a brush for sweeping the inner surface of the raw material charging chute on the eccentric rotary shaft in multiple stages up and down; and an electric motor for driving the eccentric rotary shaft to rotate.