JPH04200653A - Vertical type grinder - Google Patents

Abstract

PURPOSE:To peel deposit on the inner surface of a chute for introducing a raw material by providing a cutter to the inside of the chute so that the cutter is lengthened in the axial direction and the edge is allowed to abut on the inner surface of the chute and rotating this cutter along the same while pressing this cutter on the inner surface of the chute. CONSTITUTION:A plurality of pieces of grinding rollers 4 are freely rotatably provided on the upper face of the outer peripheral part 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. Thrust bearings 110 are provided to both the upper face of the upper end flange 17a and the lower face of the lower end flange 17b of the chute 17. A cutter 100 is provided so that it is supported to both bearings 110 and also lengthened in the axial direction in the chute 17, and the edge is allowed to abut on the inner surface of the chute 17. An energizing means presses the edge of the cutter 100 on the inner surface of the chute 17. A motor 120 and gears 122, 132 are provided as a means for rotating and driving the cutter 100 around the chute 17.

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 rotating table and pulverizing rollers, as shown in Fig. 6. 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 lO of a hydraulic cylinder 9 via an arm 5 and an arm 7 that are swingably supported by a shaft 6 in the casing la, 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.

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 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 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 through the chute, the material adheres to the inner surface of the chute that is heated by the hot air gas that is the drying heat source flowing through the vertical crusher, solidifies, and gradually develops and solidifies inside the chute. It narrows or blocks the passageway, impeding 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 without stopping the operation of the crusher.

[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 applies a predetermined crushing pressure to the crushing roller to crush the raw material supplied via the raw material input chute that hangs directly above it between the top surface of the rotary table and the circumferential surface of the crushing roller, the raw material input chute is Thrust bearings are disposed on the upper surface of the upper end flange and the lower surface of the lower end flange, and a cutter is disposed that is supported by both thrust bearings, extends in the axial direction within the raw material input chute, and has a cutting edge in contact with the inner surface of the raw material input chute. established,
The structure includes a biasing means for pressing the cutting edge of the cutter against the inner surface of the raw material inputting chute, and a means for driving rotation of the cutter around the raw material inputting chute.

[Function] In the vertical crusher of the present invention, a cutter is provided which extends vertically inside the raw material input chute and whose cutting edge comes into contact with the inner surface of the chute, and while this cutter presses the inner surface of the chute, Since it has a structure that rotates around the inner surface of the chute, any deposits on the inner surface of the chute are sheared and broken by the cutting edge of the cutter and peeled off, so the inner surface of the chute can be kept clean at all times. The cutter can be operated continuously or intermittently depending on the degree of adhesion of the raw material.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

Figures 1 to 5 relate to embodiments of the present invention, in which Figure 1 is an overall vertical cross-sectional view of a vertical crusher, Figure 2 is an enlarged vertical cross-sectional view of main parts, and Figure 3 is Figure 2 - ■ Plan view of the view, Figure 4 is Figure 2 ■-I
FIG. 5 is a cross-sectional plan view of the main part as viewed from V, and FIG. 5 is a longitudinal cross-sectional view of the main part of the biasing means of the cutter.

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.

Reference numeral 100 denotes an axially long plate-shaped cutter, which includes an upper flange 17a and a lower flange 17b of the raw material input chute 17.
Thrust bearings 110, 110 are interposed between and each donut 1fi130°134. A cutter 100 is disposed between the upper and lower donut plates 130 and 134 via a biasing means 140 so as to extend in the axial direction with its cutting edge in contact with the inner surface of the raw material input chute 17.

As shown in FIG. 5, the biasing means 140 of the cutter 100 has a compression coil spring 140b built into an inner cylinder 140a, and a shaft 100a having a disk fixed to the tip is connected to the center of the cylinder 140a. The other end of the shaft 100a is the cutter 100! i! l1i
liF and tightened with a nut 100b. In this way, the cutter 100 has a structure in which it is pressed against the inner surface of the raw material input chute by the restoring force of the compression coil spring 140b, and the pressing force of the urging means 140 is adjusted by the degree of threading of the threaded portion of the shaft 100a. Let's do it. A ring gear 132 is disposed on the outer periphery of the upper donut plate 130, and meshes with a pinion gear 122 provided on the output shaft of the electric motor 120 to rotate the donut plate 130° 134 and the cutter 100.
is rotated around the raw material input chute 17.

The cutter 100 may have a sharp cutting edge with a cross-sectional shape shown in FIG. 4, or may be abutted against a flat plate obliquely. In addition to steel, plastic or rubber having rFi abrasion properties can be used as the material.

By operating the cutter 100 of the present invention continuously or intermittently for about 5 minutes per hour during operation, deposits adhering to the inner surface of the raw material input chute are peeled off by the shearing action, and the inner surface of the chute is kept clean. .

Although gear transmission is used as the means for rotationally driving the rotary tube 100, any other means such as chain drive or V-belt drive may be used.

[Effect of the invention] As explained above, in the vertical crusher of the present invention,
Due to the rotating action of the cutter, which is pressed against the inner surface of the raw material input chute and rotates along the inner surface of the raw material input chute, deposits on the inner surface of the raw material input chute can be easily and automatically peeled off, keeping the inner surface of the raw material input chute clean. ,
A smooth supply of raw materials can be ensured.

[Brief explanation of the drawing]

Figures 1 to 5 relate to embodiments of the present invention, in which Figure 1 is an overall vertical sectional view of a vertical crusher, Figure 2 is an enlarged vertical sectional view of main parts, and Figure 3 is Figure 2 ■ Plan view of the view, Figure 4 is Figure 2 TV
FIG. 5 is an enlarged vertical cross-sectional view of the biasing means of the cutter. FIG. 6 is an overall longitudinal sectional view showing a conventional embodiment. 1... Vertical crusher, 2...
...Reducer, 3A...Rotary table, 4...
...... Grinding roller, 17...... Raw material input chute, 17a... Upper flange, 17b... Lower flange, 100... Cutter, 100a...shaft,
1oob...Nut, 110...Old...Thrust bearing, 120...Electric motor, 122...
... Pinion gear, 130 ... Donut board,
132... Ring gear, 134... Donut plate, 140... Cutter biasing means, 140a...
Cylinder, 140b...compression coil spring. Patent applicant: Ube Industries, Ltd. Figure 1 Figure 4 Figure 5 Figure 6

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 peripheral surface of a crushing roller, thrust bearings are provided on the upper surface of the upper end flange and the lower surface of the lower end flange of the raw material input chute, and the material is A cutter extending in the axial direction within the raw material inputting chute and having a cutting edge in contact with the inner surface of the raw material inputting chute is disposed, and a biasing means for pressing the cutting edge of the cutter against the inner surface of the raw material inputting chute; A vertical crusher characterized by being equipped with a means for rotating rotation around a raw material input chute.