JP2704444B2 - Vertical crusher - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vertical pulverizer for pulverizing cement raw materials, coal, chemicals, and the like by cooperation of a rotary table and a pulverizing roller.

[Prior Art] A vertical pulverizer having a rotary table and a pulverizing roller is widely used as a type of pulverizer that finely pulverizes and granulates particles such as cement raw materials, coal, and chemical products. This kind of crusher is press-contacted with a hydraulic pressure or the like at a lower part of a cylindrical casing, which is driven by a motor with a speed reducer and rotates at a low speed, and at a location where an outer peripheral portion of the upper surface is equally divided in a circumferential direction. And a plurality of crushing rollers that are driven and rotated.

For example, in FIG. 3 showing a conventional vertical pulverizer, a pulverizer generally designated by reference numeral 1 is formed as a single tower in appearance, and a rotary table 3 rotated by an electric motor (motor) 2 at its base. Is arranged. A plurality of conical pulverizing rollers 4 are arranged so as to rotate while being in sliding contact with the rotary table 3, and the pulverizing rollers 4 are rotatably supported by a support arm 5. The support arm 5 is fixed at its center to a support shaft 6 which is rotatably supported on the side of the pulverizer. The support arm 5 extends downward through the side of the casing 8 surrounding the turntable 3. , Facing the lower space of the crusher. The lower end of the support arm 5 is rotatably supported on the tip of a rod of a pressure cylinder 9 whose lower end is rotatably supported on the base of the crusher 1. Reference numeral 10 indicates coupling.

Then, from a raw material supply device (not shown), a rotary table 3
The granules as a raw material supplied by the supply pipe 11 to the center of the
It is caught and pulverized between the roller 4 and the rotary table 3 driven by the rotation of the table. On the other hand, hot air is guided into the casing 8 by a duct (not shown).
This hot air blows up from the annular space 12 between the outer peripheral surface of the turntable 3 and the inner peripheral surface of the casing 8,
The fine powder rises inside the crusher 1 while being dried, is discharged from the discharge port 13 as a mixture with hot air, and is sent to the next step.

Although some of the coarse particles also rise in the crusher 1, they are classified by the upper separator 14 and returned to the turntable 3.

The rotary table 3 has a rotary shaft (not shown) extending vertically downward, and the rotational force of the motor 2 is reduced in the casing of the speed reducer denoted by reference numeral 2A to reduce the rotational force of the rotary table 3. In addition to the speed reducer transmitting to the rotating shaft, the rotary table 3
Are provided with a thrust bearing mechanism and a radial bearing mechanism for supporting the same via the rotating shaft (both are not shown).

[Problems to be Solved by the Invention] In a vertical pulverizer, as described above, the rollers bite the raw material between the table surface and pulverize the raw material. If the thickness of the interposed raw material layer is not appropriate, or if the raw material supply is too large or too small, and is not an appropriate amount, the rollers run idle and the pulverization efficiency is significantly reduced.

For this reason, as shown in FIG. 4, an annular dam ring 3c higher than the liner 3a of the rotary table 3 is provided at the outermost periphery of the rotary table to serve as a weir for the raw material layer to be pulverized. For this reason, the raw material layer is maintained at an appropriate height, and good pulverization is ensured. However, the table liner 3a and the roller body 4a of the crushing roller are worn as the crushing progresses, or the material layer thickness H must be changed to a suitable material layer thickness H as the crushability changes due to the change of the crushing material. Accordingly, it is necessary to change the height h of the dam ring. For this reason, it is necessary to stop the operation, wait for the inside of the mill to cool down, enter the mill, manually change the combination of the thicknesses of the plurality of steel sheets forming the dam ring, and change the thickness to a predetermined height. Work was needed. Further, even if the properties of the raw materials change without stopping the operation, the height h of the dam ring could not be changed in a short time following the change.

[Means for Solving the Problems] In order to solve the above problems, a vertical pulverizer of the present invention is pivotally supported so that the upper surface is substantially horizontal, and is driven to rotate about a vertical axis by a driving device. A rotary table, and a vertical pulverizer provided with a pulverizing roller disposed in sliding contact with the rotary table, an annular dam ring is disposed on the outermost periphery of the rotary table so as to be slidable in the vertical direction, A hydraulic cylinder, a vertical sliding means connected to the dam ring;
Either a pneumatic cylinder or an electric cylinder, and a quick coupling (removable) is installed on the edge of the hydraulic piping, pneumatic piping, or power wiring that is provided around the rotary table and transmits the dam ring lifting power to the vertical sliding means. Joint).

[Operation] In the vertical pulverizer of the present invention, a vertically movable dam ring is disposed on the outermost periphery of the rotary table, so that the material properties change, the processing material changes, and the change over time due to the wear of the table liner. If you want to change the dam ring height, do not wait for the cooling period of about 30 minutes to 1 hour after stopping the operation,
The height of the dam ring can be changed in a short time by connecting a power path to the vertical sliding means (hydraulic cylinder, pneumatic cylinder, electric cylinder) of the dam ring. That is, in the case of the vertical sliding means composed of a hydraulic cylinder or a pneumatic cylinder, the hydraulic pipe or pneumatic pipe edge end brought from outside the mill to the quick coupling (detachable joint) provided at the pipe edge after the operation is stopped. To supply hydraulic oil or compressed air to a hydraulic cylinder or a pneumatic cylinder to move the dam ring up and down to an arbitrary height.

Further, in the case of the vertical sliding means composed of an electric cylinder, the power wiring cord is connected and the height can be set to a predetermined height by an inching operation (inching operation), which is further simple.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

1 and 2 show one embodiment of the present invention. FIG. 1 is an enlarged longitudinal sectional view of a main part, and FIG. 2 is a plan view taken along the line II-II of FIG.

In the figure, 3 is a rotary table, 3a is a table liner, 3b is a liner retainer, 3c is a dam ring, 4 is a crushing roller, 4a is a roller body, 4b is a rotating shaft, 50 is a hydraulic cylinder,
50a is a piston rod, 50b is a hydraulic pipe, 50c is a header, 50d is a quick coupling (piping joint), and 51 is a support. H is the thickness of the raw material layer, h is the height of the dam ring, and l is the distance (gap) between the inner end face of the dam ring and the outer diameter of the roller body 4a.

The dam ring 3c has an annular shape, is fitted on the outer periphery of the rotary table 3, and has piston rods 50a of four hydraulic cylinders 50 fixed to a support 51 attached to the lower side of the rotary table 3. And slidable up and down. As shown in FIG. 2, the upper and lower hydraulic pipes 50b of the hydraulic cylinder 50 are
At the intermediate position between 0 and 50, the hydraulic cylinder 50 is connected to the header 50c, and a quick coupling (piping joint) is provided outside the head 50c, and a pipe from a hydraulic unit (not shown) is connected. Piston rod 50
The vertical movement of a can be controlled.

Further, in order to detect the height of the dam ring 3c, a potentiometer (not shown) or another non-contact type position sensor (for example, a magnetic scale) is provided in the vertical pulverizer,
Monitoring can be done in a remote control room.

With the above-described configuration, the dam ring height h is increased due to fluctuations in the operating load and the raw material properties (grindability), wear of the roller tires and table liners, and changes in the pulverization conditions such as changes in the pulverized raw materials. If you want to change to an appropriate value, stop the operation and immediately connect the piping from the hydraulic unit installed outside the mill to the quick coupling 50d,
The height of the dam ring 3c can be changed to any position up and down.

Also, a pneumatic cylinder or an electric cylinder can be used instead of the hydraulic cylinder, and the dam ring can be moved up and down by attaching and detaching pneumatic piping and electric wiring, respectively, as in the case of the hydraulic cylinder.

The hydraulic piping is extended further than the hydraulic piping header 50c, penetrates through the rotary table 3 and is arranged up to the top of the table holder 3b, and the quick coupling 50d is fixed here to further attach and detach the piping. And the work is easy.

[Effects of the Invention] As described above, in the present invention, the annular dam ring is disposed on the outermost periphery of the rotary table so as to be slidable in the vertical direction. After the operation is stopped, the mill can be changed to an arbitrary position by attaching / detaching the power system (hydraulic piping, pneumatic piping, electric wiring) without replacing the dam ring without waiting for cooling in the mill. Therefore, maintainability is improved and production efficiency is increased.

[Brief description of the drawings]

1 and 2 show one embodiment of the present invention. FIG. 1 is an enlarged longitudinal sectional view of a main part, and FIG. 2 is an enlarged plan view of a main part as viewed from II-II in FIG. 3 and 4 show an embodiment of a conventional vertical pulverizer. FIG. 3 is an overall longitudinal sectional view, and FIG. 4 is an enlarged longitudinal sectional view of a main part. 1 ... vertical grinding machine, 3 ... rotating table, 3a ... table liner, 3b ... liner holder, 3c ... dam ring, 4 ... grinding roller, 4a ... roller body, 4b ... rotating shaft, 50 ... Hydraulic cylinder, 50a ... Piston rod, 50b ... Hydraulic piping, 50c ... Header, 50d ... Quick coupling, 51 ... Support, H ... Raw material layer thickness, h ... Dam ring height, l ... Gap.

Claims (1)

(57) [Claims] 1. A vertical pulverizer comprising: a rotary table pivotally supported so that an upper surface thereof is substantially horizontal, and driven to rotate about a vertical axis by a driving device; and a pulverizing roller disposed in sliding contact with the rotary table. An annular dam ring is disposed on the outermost periphery of the rotary table so as to be vertically slidable, and a vertical sliding means connected to the dam ring is provided with a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. In any case, a quick coupling (detachable joint) is provided at an edge of a hydraulic pipe, a compressed air pipe, or a power wiring which is provided around the rotary table and transmits dam ring lifting power to the vertical sliding means. Characteristic vertical grinder.