JP2002159874A - Vertical mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical mill wherein an excessive force in the radial direction of a rotary table does not act on a support saddle. SOLUTION: This mill comprises a rotary table 2 which is arranged in a casing 1 and receives supplied unfixed-shape materials by its upper plane; a support saddle 3 which is vertically installed at the side of the rotary table 2 and has a bearing 4 set up at its upper end; an oscillating arm 6 of which the base end is linked to the bearing 4 by an oscillation center shaft 5; a grinding roller 7 which is attached to the end of the oscillating arm 6 so that it is rotatable on the upper plane of the rotary table 2; a pressing cylinder 8 which forces the end of the oscillating arm 6 toward the rotary table 2; and a displacement inhibition means 20 which links the support saddle 3 to the trunk part of the casing 1 and inhibits the displacement of the upper part of the support saddle 3 in the radial direction of the rotary table 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical mill.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional vertical mill. This vertical mill includes a rotary table 2 disposed near an inner bottom of a casing 1 and support legs 3 standing upright outside the casing 1. And a bearing 4 mounted on the upper part of the support leg 3, and a base 1 pivotally supported by the bearing 4 by a swinging center shaft 5 extending in a tangential direction of the turntable 2, and a casing 1 body portion above the turntable 2. , A crushing roller 7 pivotally supported at the tip of the swing arm 6 so that the upper surface of the rotary table 2 can be rolled, and the tip of the swing arm 6 facing the rotary table 2. A pressurizing cylinder 8; an input pipe 9 which penetrates the body of the casing 1 and feeds an irregular crushing material such as limestone from the outside onto the rotary table 2;
A delivery pipe 10 for passing the pulverized material having a predetermined particle size penetrating through the upper portion to the outside, a motor 11 provided outside the casing 1 and driving the rotary table 2,
A classifier 12 disposed at an upper inside portion of the casing 1, a motor 13 provided at an upper portion of the casing 1 and driving the classifier 12, and a casing (not shown) including a casing 1
And a base 14 to which the lower end of the support leg 3 is fastened, and an air flow is supplied to the lower inside of the casing 1.

The pressing cylinder 8 has a housing 15
Is located near the lower end of the support leg 3 and the piston rod 16
Are pivotally supported at the intermediate portion in the longitudinal direction of the swing arm 6 via connecting shafts 17 and 18 extending in the tangential direction of the turntable 2 respectively.

[0004] In the vertical mill shown in FIG.
While rotating the rotary table 2 and the classifier 12 by 3, the irregularly shaped crushing material is fed from the charging pipe 9 onto the rotary table 2 so that the tip of the swing arm 6 is urged toward the rotary table 2. When the pressing cylinder 8 is operated, the crushing roller 7 crushes the irregularly shaped crushing material dispersed near the periphery of the rotary table 2 by centrifugal force.

[0005] Further, the crushed material crushed to a predetermined particle size is subjected to a classifier 1 by an air flow fed to the lower inside of the casing 1.
It is transported to the outside of the casing 1 via the delivery pipe 2 and the delivery pipe 10.

[0006] A crushing material larger than a predetermined particle size is sorted by the classifier 12, falls on the rotary table 2, and is crushed by the crushing roller 7.

[0007]

However, in the vertical mill shown in FIG. 4, when a large-sized irregular pulverized material is caught between the upper surface of the rotary table 2 and the outer peripheral surface of the pulverizing roller 7, the vertical mill shown in FIG. An excessive horizontal force directed radially outward of the rotary table 2 acts on the upper portion of the support leg 3 via the crushing roller 7, the swing arm 6, the swing center shaft 5, and the bearing 4, and the base 1
Bolts and base 1 fastening the lower part of support legs 3 to 4
4 may be damaged.

The present invention has been made in view of the above circumstances, and has as its object to provide a vertical mill in which an excessive force in the radial direction of the rotary table does not act on the support legs.

[0009]

In order to achieve the above object, a vertical mill according to the first aspect of the present invention comprises: a rotary table disposed inside a casing to which an irregularly shaped material is supplied from above; A support leg erected outside, a bearing attached to the upper end of the support leg, and a base end portion pivotally supported by the bearing by a swing center shaft extending in a tangential direction of the rotary table, and the casing body is positioned above the rotary table. A swinging arm that penetrates, a crushing roller pivotally supported so as to be able to roll the upper surface of the rotary table at the tip of the swinging arm, pressing means for urging the tip of the swinging arm toward the rotary table, and support Displacement suppressing means for connecting the legs to the casing body.

[0010] In the vertical mill according to claim 2 of the present invention,
The spring which is connected to the support leg and the casing body and which can expand and contract in the radial direction of the rotary table constitutes the displacement suppressing means.

[0011] In the vertical mill according to claim 3 of the present invention,
A spring and a fluid pressure cylinder connected to the support leg and the casing body and expandable and contractable in the radial direction of the rotary table, and a flow control valve for communicating the fluid chambers of the fluid pressure cylinder with each other constitute a displacement suppressing means. ing.

[0012] In the vertical mill according to claim 4 of the present invention,
A fluid pressure cylinder connected to the support leg and the casing body and capable of expanding and contracting in the radial direction of the rotary table; and a check valve communicating with one fluid chamber of the fluid pressure cylinder and having an operating pressure setting function in the other fluid chamber The displacement suppressor is constituted by the accumulator connected via the.

In any of the vertical mills according to the first to fourth aspects of the present invention, the displacement of the upper portion of the support leg in the radial direction of the rotary table is controlled by the displacement suppressing means for connecting the support leg to the casing body. This corresponds to the fact that the irregularly shaped crushing material having a large shape is caught between the upper surface of the rotary table and the outer peripheral surface of the crushing roller.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of a vertical mill according to the present invention. In the figure, the parts denoted by the same reference numerals as those in FIG. 4 represent the same parts.

This vertical mill is provided with a displacement suppressing means 20 interposed between a frame 19 attached to the body of the casing 1 and extending in the circumferential direction and the support leg 3.

The displacement restraining means 20 is provided at the upper end of the supporting leg 3 via a pin 22 whose piston rod is pivotally supported by the frame 19 via a pin 21 extending in the tangential direction of the rotary table 2 and the housing is parallel to the pin 21. A fluid pressure cylinder 23 pivotally supported at a shift portion, a spring 24 having one end locked to the frame 19 and the other end locked to an upper end portion of the support leg 3, and a conduit 26 having a flow control valve 25. It is composed of

One end of the conduit 26 is connected to the hydraulic cylinder 23
The other end of the conduit 26 is connected to the rod-side fluid chamber of the hydraulic cylinder 23,
These are filled with hydraulic oil.

In the vertical mill shown in FIGS. 1 and 2, the irregular-size crushed material fed onto the rotary table 2 is driven by driving the rotary table 2 and pressing the crushing roller 7 onto the rotary table 2. When crushing, the displacement in the radial direction of the rotary table 2 that is to be transmitted to the upper portion of the support leg 3 via the crushing roller 7, the swing arm 6, the swing center shaft 5, and the bearing 4,
This is suppressed by the compression resistance and the expansion resistance of the spring 24 connecting the frame 19 of the body of the casing 1 and the support leg 3.

When a force in the radial direction of the rotary table 2 exceeding the deformation resistance load of the spring 24 is instantaneously applied to the support leg 3, the rod-side fluid chamber of the fluid pressure cylinder 23 and the head-side fluid Hydraulic oil is exchanged with the chamber via the flow control valve 25, the force acting on the support leg 3 in the radial direction of the rotary table 2 is reduced, and the sudden displacement of the support leg 3 is suppressed. .

Therefore, an excessive horizontal force in the radial direction of the rotary table 2 is prevented from being applied to the upper portion of the support leg 3, and the bolts and the base 14 that fasten the lower portion of the support leg 3 to the base 14 are prevented. No damage to the

Further, the crushing of the irregularly shaped crushing material and the detachment of the irregularly shaped crushing material from between the upper surface of the rotary table 2 and the outer peripheral surface of the crushing roller 7 cause the force in the radial direction of the rotary table 2 to the support leg 3. When the support leg 3 is released, the support leg 3 returns to the original upright state by the restoring force of the spring 24.

At this time, the sudden displacement of the support leg 3 is suppressed by the transfer of hydraulic oil between the rod-side fluid chamber and the head-side fluid chamber of the fluid pressure cylinder 23.

FIG. 3 shows another example of the embodiment of the vertical mill according to the present invention. In the figure, the parts denoted by the same reference numerals as those in FIGS. 1 and 2 represent the same parts.

This vertical mill is provided with the displacement suppressing means 2 described above.
In place of the hydraulic cylinder 23, a piston rod is pivotally supported by a frame 19 via a pin 21 and a housing is pivotally supported by a pin 22 at a portion of the support leg 3 near the upper end.
And a check valve 27 having an operating pressure setting function and an accumulator 28 attached to each hydraulic pressure cylinder 23, and constitute a displacement suppressing means 29.

The accumulator 28 includes the hydraulic cylinder 2
No. 3 is connected to the rod-side fluid chamber and connected to the head-side fluid chamber via a check valve 27, and the inside thereof is filled with hydraulic oil.

In the vertical mill shown in FIG.
When the above-mentioned irregular shaped crushing material is crushed, the displacement to be imparted to the upper portion of the support leg 3 via the crushing roller 7, the swing arm 6, the swing center shaft 5, and the bearing 4 is used as an operating pressure setting function. The check valve 27 prevents the hydraulic oil from flowing out from the fluid chamber on the head side of the fluid pressure cylinder 23.

When the internal pressure of the head-side fluid chamber of the hydraulic cylinder 23 exceeds the set value of the operating pressure of the check valve 27 due to the force acting on the support leg 3, the head-side fluid chamber of the hydraulic cylinder 23 and the accumulator 28 The transfer of the hydraulic oil is performed between these steps, whereby the minute displacement of the support leg 3 is allowed.

Therefore, an excessive horizontal force in the radial direction of the turntable 2 is prevented from being applied to the upper portion of the support leg 3, and the bolts and the base 14 that fasten the lower portion of the support leg 3 to the base 14 are prevented. No damage to the

It should be noted that the vertical mill of the present invention is not limited to the above-described embodiment, but may be modified without departing from the spirit of the present invention.

[0031]

As described above, according to the vertical mill of the present invention, the displacement of the upper portion of the support leg in the radial direction of the rotary table is suppressed by the displacement suppressing means for connecting the support leg and the casing body. Since an excessive force in the radial direction of the rotary table is prevented from acting on the support legs, an excellent effect that no damage occurs to the support legs can be achieved.

[Brief description of the drawings]

FIG. 1 is a partial vertical sectional view showing an example of an embodiment of a vertical mill of the present invention.

FIG. 2 is a conceptual diagram showing a displacement suppressing unit in FIG.

FIG. 3 is a conceptual diagram showing another example of the displacement suppressing means applied to the vertical mill of the present invention.

FIG. 4 is a longitudinal sectional view showing an example of a conventional vertical mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Rotary table 3 Support leg 4 Bearing 5 Oscillating center axis 6 Oscillating arm 7 Crushing roller 8 Pressing cylinder (pressing means) 20 Displacement suppressing means 23 Fluid pressure cylinder 24 Spring 25 Flow control valve 27 Check valve 28 Accumulator 29 Displacement suppression means

Claims (4)

[Claims] 1. A rotary table disposed inside a casing to which irregular shaped crushing material is supplied from above, a support leg erected outside the casing, a bearing attached to an upper end of the support leg, and a base end. A swing arm pivotally supported by a bearing by a swing center shaft extending in a tangential direction of the turntable and penetrating the casing body above the turntable; and a pivotal support for rotating the upper surface of the turntable at the tip of the swing arm. Crushing roller,
A vertical mill comprising: pressing means for urging a tip of a swinging arm toward a rotary table; and displacement suppressing means for connecting a support leg to a casing body. 2. The vertical mill according to claim 1, wherein the displacement suppressing means is constituted by a spring which is connected to the support leg and the casing body and can expand and contract in the radial direction of the rotary table. 3. A displacement restraint by a spring and a fluid pressure cylinder connected to the support leg and the casing body and capable of expanding and contracting in the radial direction of the rotary table, and a flow control valve communicating each fluid chamber of the fluid pressure cylinder to each other. 2. The vertical mill according to claim 1, wherein said means comprises means. 4. A fluid pressure cylinder connected to the support leg and the casing body and capable of expanding and contracting in the radial direction of the rotary table, and an operating pressure setting function communicating with one fluid chamber of the fluid pressure cylinder and the other fluid chamber. 2. The vertical mill according to claim 1, wherein the displacement suppressing means is constituted by an accumulator connected via a check valve provided with the vertical axis.