JPH03146143A - Vertical crusher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vertical pulverizer that pulverizes cement raw materials, coal, chemicals, etc. by cooperation of a rotary table and pulverizing rollers.

[Prior Art] A vertical pulverizer equipped with a rotary table and a pulverizing roller is widely used as a type of pulverizer that finely pulverizes granules such as cement raw materials, coal, and chemicals into powder. This type of crusher consists of a disk-shaped rotary table that is driven by a motor with a reducer to rotate at low speed in the lower part of a cylindrical casing, and a part that divides the outer circumference of the upper surface into equal parts in the circumferential direction, which is pressed by hydraulic pressure or the like. It is equipped with a plurality of crushing rollers that are driven to rotate by the crushing roller.

For example, in FIG. 3 showing a conventional vertical crusher, the crusher, which is designated as a whole by reference numeral 1, is externally formed as a single tower body, with a rotating table 3 rotated by an electric motor 2 at its base. is located. A plurality of conical crushing rollers 4 are arranged to rotate in sliding contact with the rotary table 3, and the crushing rollers 4 are rotatably supported on a support arm 5. Support arm 5
is a support shaft 6 which is rotatably supported on the crusher side at its center.
Furthermore, this support arm 5 extends downwardly through the side force of the casing 8 surrounding the rotary table 3 and faces into the lower space of the crusher. The lower end of this support arm 5 is rotatably supported at the tip of the loft of a pressure cylinder 9 whose lower end is rotatably supported at the pace of the crusher 1. Reference numeral 10 indicates a coupling.

And raw material supply equipment 5! The granules as a raw material are supplied from t (not shown) to the center of the rotary table 3 through the supply pipe 11, and are caught between the driven roller 4 and the rotary table 3 by the rotation of the table and are crushed. . - Hot air is guided into the casing 8 by a duct (not shown), and this hot air is directed between the outer peripheral surface of the rotary table 3 and the casing 8.
The fine powder is blown up from the annular space 12 between the inner circumferential surface of the pulverizer l, and is dried while rising inside the pulverizer l, and is discharged from the outlet 13 as a mixture with hot air and sent to the next process. .

Incidentally, some of the coarse particles also rise in the crusher 1, but are classified by the upper separator 14 and returned onto the rotary chieple 3.

Note that the rotary table 3 has a rotating shaft (not shown) extending vertically downward, and the rotary table 3 has a rotary shaft (not shown) that extends vertically downward. In addition to a speed reducer that transmits transmission to the rotating shaft of No. 3, a thrust bearing mechanism and a radial bearing mechanism for supporting the rotating table 3 via the rotating shaft are provided (none of which are shown).

[Problems to be Solved by the Invention] In the vertical crusher, as mentioned above, the rollers bite the raw material between the table surface and crush the raw material, but there is no space between the rotary table and the crushing rollers. If the thickness of the intervening raw material layer is not appropriate, or if the amount of raw material supplied is too large or too small and is not appropriate, the rollers will idle, resulting in a significant drop in pulverization efficiency.

Therefore, as shown in FIG. 4, an annular dam ring 3C higher than the liner 3a of the rotary table 3 is provided on the outermost periphery of the rotary table to serve as a dam for the raw material layer to be crushed. Therefore, the raw material layer is maintained at an appropriate height and good pulverization is ensured. However, as the pulverization progresses, the table liner 3a and the roller body 4a of the pulverizing roller wear out, or as the pulverizability changes due to changes in the pulverized raw material, the thickness H of the raw material layer must be changed to a suitable one. Accordingly, the dam ring height h must be changed. For this reason, it is a complicated labor to stop the operation, wait for the inside of the mill to cool down, and manually change the combination of thicknesses of the multiple steel plates that form the dam ring to the desired height. Work was needed. In addition, even if the raw material properties change without stopping operation, it is not possible to change the tum ring height h in a short period of time.

[Means for Solving the Problems] In order to solve the above problems, the vertical crusher of the present invention is pivoted so that the top surface is substantially horizontal, and is driven to rotate around a vertical axis by a drive device. In a vertical crusher equipped with a rotary table and a crushing roller slidably disposed on 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, and the dam As means for vertically sliding the ring, a plurality of hydraulic cylinders, pneumatic cylinders, or electric cylinders are disposed below the dam ring and connected to the dam ring, and power is supplied to the vertically sliding means. The piping or power wiring was connected to the fixed piping above or below the axis of the rotary table via a rotary joint, or to the fixed wiring via a slider (slip ring).

[Function] The vertical crusher of the present invention has an annular dam ring arranged around the outer periphery of the rotary table so as to be slidable in the vertical direction, and a plurality of hydraulic cylinders, pneumatic cylinders, or electric cylinders connected to the dam ring. Connect the power piping or power electrical wiring to the ring and connect the rotating joint or slider (
Since the dam ring is connected via a slip ring (slip ring), the dam ring height can be changed as needed during operation without having to stop mill operation, wait for the inside of the mill to cool down, and then perform the complicated dam ring replacement work. can be adjusted.

[Examples] Examples of the present invention will be described in detail below based on the drawings.

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

In the figure, 3 is a rotary table, 3a is a table liner, 3b is a liner presser, 3C is a dam ring, 3d is a cover, 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 hydraulic piping, 50c is header, 50d is quick coupling (piping joint), 50e is hydraulic piping, 50f is piping joint, 51 is support, 60 is hydraulic piping (fixed), 6
゜a is a protection pipe (fixed) for piping, and 60b is a cap. In addition, H is the raw material layer thickness, h is the dam ring height, and the text is the distance # (gap) between the dam ring inner end surface and the outer diameter of the roller body 4a.
It is.

The dam ring 3c has an annular shape, is fitted around the outer periphery of the rotary table 3, and has four hydraulic cylinders 5 fixed to a support 51 attached to the lower side of the rotary table 3.
It is connected to the piston rod 50a of No. 0, and is configured to be slidable in the vertical direction. As shown in FIG. 2, the hydraulic piping 50b above and below the hydraulic cylinder 50 is connected to the header 50 at an intermediate position between the hydraulic cylinders 50 and 50 on both sides.
A coupling (piping joint) 50b is connected to the liner holder 3b of the rotary table 3 via a hydraulic piping 50e, a piping joint 50f, and a hydraulic piping 50g, which are connected to the rotary table 3 and connected to the rotary table axis. The piston rod 50 of the hydraulic cylinder 50 is connected to a piping 60 from a hydraulic unit (not shown) outside the mill.
It is possible to control the vertical movement of a.

Furthermore, in order to detect the height of the dam ring 3C, a potentiometer (not shown) or a position sensor (for example, a magnetic scale) that is in contact with the potentiometer is installed in the vertical crusher,
It is now possible to monitor from a remote control room.

With the above configuration, fluctuations in operating load and raw material properties (susceptibility to crushing) and roller tires can be avoided.

When you want to change the dam ring height h to an appropriate value due to changes in grinding conditions such as wear of table liners, changes in grinding raw materials, etc., by promptly operating the hydraulic unit as necessary during operation, The height of the tom ring 3C can be changed up or down to any desired position.

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

Sliding elements can be used to connect the rotating and stationary parts of the electrical wiring.

Note that in this embodiment, the hydraulic piping 50g extends the rotary table axis upward and the quick coupling 50b is disposed on the top of the liner presser 3b, but conversely, the rotary table axis is extended downward and the mill It may be connected to hydraulic piping from the outside by a quick coupling. In this case, the output shaft of the speed reducer 2A that rotationally drives the rotary table 3 is preferably made hollow and passed through the output shaft.

[Effects of the Invention] As explained above, in the present invention, an annular dam ring is disposed on the outermost periphery of the rotary table so as to be slidable in the vertical direction, and a vertical sliding means is provided so that the pulverization can be carried out by remote control. The height of the dam ring can be changed arbitrarily according to changing conditions. Therefore, there is no need to stop operation and there is no need to replace the dam ring, improving maintainability and increasing production efficiency.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, in which FIG. 1 is an enlarged longitudinal sectional view of the main part, and FIG. 2 is an enlarged plan view of the main part as viewed from II-II in FIG. 3 and 4 show an embodiment of a conventional vertical crusher, with FIG. 3 being an overall longitudinal sectional view and FIG. 4 being an enlarged longitudinal sectional view of a main part. 1... Vertical crusher, 3... Rotating table, 3a... Table liner, 3b... Liner presser, 3C... Dam ring, 3d... Cover 4. ...Crushing roller, 4a...Roller body, 4b...Rotating shaft, 50...Hydraulic cylinder, 50a...Piston rod, 50b...Hydraulic piping, 50c... header 50
d...Quick cambling, 50e...Hydraulic piping, 50f...Piping joint, 5
0g...Hydraulic piping, 51...Support, 60...Hydraulic piping (fixed), 60a...Protection tube (fixed), 60b...Jinkasa, H... ...Raw material layer thickness, h...Dam ring height, text...Gap.

Claims (1)

[Claims] (1) In a vertical crusher equipped with a rotary table that is pivotally supported so that its upper surface is substantially horizontal and is driven to rotate around a vertical axis by a drive device, and a crushing roller that is slidably arranged on 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, and a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder is installed below the dam ring as means for vertically sliding the dam ring. A plurality of pipes are arranged in the dam ring and connected to the dam ring, and power supply piping or power wiring to the vertical sliding means is connected to a fixed pipe above or below the axis of the rotary table via a rotary joint. A vertical crusher characterized in that it is connected to fixed wiring via a slip ring.