JPS60143838A - Cage mill - 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 This invention relates to an improvement in a cage mill for crushing hard raw materials such as stones and gravel.

A cage mill consists of a cylindrical (i.e. cage-shaped) rotor by arranging a large number of bins on the circumference of a disc installed in a casing, and by rotating such a rotor, the crushed material is It collides with a bottle or casing and uses the impact force to crush gravel, etc. Basics of cage mills like this GEL Special Publication 11
r (disclosed in Publication No. 48-33055).

In conventional cage mills, the wear parts are made of high chromium steel, but when applied to highly hard raw materials, the service life is short and as a result, running costs are too high. In particular, the parts of the bottle that functioned as the rotor that came into direct contact with the raw materials were severely worn.

The present invention has been made in view of the above circumstances, and aims to provide a cage mill that significantly increases the service life, reduces complicated replacement work, and has extremely good work efficiency.

The gist of the present invention to achieve this object is to include a casing, a disk provided to rotate within the casing, a number of shafts attached concentrically and at equal intervals to the disk, In a cage mill equipped with a ring provided at the tip of the shaft, the shaft is lined with ceramic with an adhesive and is made into a ceramic bottle, and is designed so that there is no direct contact between the disk and the ceramic bottle or the ring and the reramik pin.
This is due to the provision of a lever mechanism.

Hereinafter, a detailed description of the invention will be given with reference to the drawings.

FIG. 1 is a schematic perspective view showing an example of a cage mill according to the present invention. A mounting 2 is provided on the base 1 via a frame 18. As shown in Figure 2,
Inside the casing 2, two discs 3.4 are arranged concentrically. The center part of the disk 3 is connected to a drive shaft 5. The center of the other disc 4 is connected to another drive shaft 6. These drive shafts 5.6 are rotatably supported by Petz rings (not shown), and each is driven by a separate electric motor (not shown) to rotate in opposite directions. , is becoming a sea urchin.

A plurality of ceramic bottles 7.8 are mounted on the circumference of the can IM 3.4 at equal intervals and concentrically. A ring 9.10 having a different diameter is installed at the tip of each ceramic bottle 7.8. Ceramic bottle7.
A through hole is formed in the center of the shaft 11.
12 is passing.

One end of each axis 11.12 is rounded to a circle fA3.4]13.
14. The other end of the shaft 11.12 projects slightly through the hole in the ring 9.10 and is attached to the nut 1.
3.14 fixes the ring 9.10.

After 'cliT, si<J, sea urchins 1 to 31II, which do not come into direct contact with the ends of each ceramic bottle 7.8, as explained above.
A gap S of approximately Ia is set.

The large number of ceramic bottles 7, J, and 8 of the previous book constitute a cage-shaped rotor, each having a different size. Generally, the large-diameter disk 3 and the ceramic bottle 7 fixed thereon are called a large cage, and the small-diameter disk 4 and the ceramic bottle 8 fixed thereon are called a small cage.

In the example shown in the figure, the number of rows of bottles is two, but there are also two rows of bottles (in that case, there is one disc),
There are 4-column formats, 6-column formats, etc. The finer the grinding or shredding, the more rows of bins there will generally be. The grain size can also be changed by changing the rotation speed of the disc.

The outside of the large cage is surrounded by housing 2 - (
There is. Although the housing 2 has a nearly cylindrical shape in the illustrated example, it may have any other shape.

In use, the raw material is supplied from the hopper 15 to the center of the small cage, that is, to the drive shaft 6, and is first hit by the ceramic bin 8 of the small cage, thrown in the outer circumferential direction, and then (The blows are superimposed by the large ceramic bottle 7 rotating in the opposite direction)
, it is crushed even more finely. Finally, the raw material is discharged from the ceramic bin 7 of the large cage to the outer periphery and is finally crushed by the breaker plate 17 provided on the inner peripheral surface of the housing 2. Thereafter, the crushed material is discharged from the outlet 16 at the bottom of the housing 2 due to its own weight.

This invention lines the cage shaft with ceramic and is equipped with a stopper mechanism, and can be applied to both large cages and small cages. do.

First, in the embodiment shown in FIG. 4, a gap is created between the through hole 7a formed in the center of the ceramic bottle 7 and the shaft 11, and the adhesive 20 is filled in the gap. be. This maintains the ceramic bottle 7 and the shaft 11 in a fixed relationship. There are male screws 1 on both ends of the shaft 11.
1a is formed. Furthermore, small cylindrical notches are formed inside both ends of the ceramic bottle 7, and spacers 21 are placed in the notches. An adhesive 20 is filled between the spacer 21 and every notch in the ceramic bottle 7. The spacer 21 serves as a stopper structure, and a gap S can be formed between the disc 3 and the ceramic bottle 7 and between the ring 9 and the ceramic bottle 7.

The ring 9 is fixed between a nut 13 and a spacer 21, which is screwed onto the male thread 11a of the shaft 11.

A spacer 21 that weighs against the disk 3 is also fixed to the circle a3 in the same shape as the ring 9.

The adhesive 20 may be an epoxy resin or other binder.

By interposing the adhesive between the shaft and the ceramic bottle, the impact on the ceramic can be alleviated and cracking of the ceramic can be prevented.

The embodiment of FIG. 5 is very similar to the embodiment of FIG. 4, except that the adhesive 20 is not provided between the spacer 21 and the ceramic bottle 7. That is, the ceramic bottle 7 and the spacer 21 are in direct contact with each other, and the spacer 21 can be removed from the shaft 11 as necessary. In this example, the spacer 21 can be easily replaced and its thickness can be easily adjusted. It is easy to change the gap S.

In the embodiment shown in FIG. 6, the shaft 11 has a pipe shape, and internal threads 11b forming stepped portions are formed inside both ends of the shaft 11, respectively. A screw 1 of the shaft 11
A male threaded portion 22a with a bolt 22 is screwed to 1b. This male screw part 22a has a -fil screw 3b of the disk 3.
The female threaded portion 9b of the ring 9 is also screwed. And 1 yen! A gap S can be set between A3 and the ceramic bottle 7 and between the ring 9 and the ceramic bottle 7. Furthermore, there is a small lance between the through hole 7a of the ceramic bottle 7 and the shaft 17), which is filled with a contacting agent 20, and the ceramic bottle 7 is fixed to the shaft 11. There is.

In the embodiment of FIG. 7, the ceramic bottle 7 and the shaft 11
A pipe 24 is interposed between the two. A contacting agent 20 is filled between the pipe 24 and the ceramic bottle 7,
The pipe 24 and the ceramic bottle 7 are fixed. On the other hand, attach nuts 25 to both ends of the pipe 24 using the male threads 1 of the shaft 11.
Disc 3 and ring 9 are screwed into 1a, respectively.
The pipe 24 is maintained in a fixed relationship. The end of the pipe 24 slightly protrudes from the end surface of the ceramic bottle 7, so that a gap Slfi can be set between the ceramic bottle 7, the disk 3, and the ring 9.

In the embodiment of FIG. 8, the shaft 11 and the ceramic bottle 7
An adhesive 20 is filled between the through hole 7a and the through hole 7a to fix the two. In addition, both ends of the shaft 11 are stepped, and a male screw 11a has a slightly smaller diameter.
is formed. First, on the disc 3 side, use the washer 26.
into the depths of the male threaded part 11a, and each disc 3
By tightening the nut 25 across the circle 183
and shaft 11 are maintained in a fixed relationship. After that, the same process is performed on the ring 9 side. Also in this example, washer A7
A gap S can be formed between -26 and ceramic bottle 7. In the embodiment shown in FIG. 9, a pipe 27 is interposed between the ceramic bottle 7 and the shaft 11.
An adhesive 20 is filled between the ceramic bottle 7 and the ceramic bottle 7 to fix the two. The end of the shaft 11 has a male screw 11a.
The sleeve 28 with the flange is passed through the sleeve 28, and the disks 3 are placed on the outside of the sleeve 28.
and a ring 9 are provided, and the nut 25 is screwed to the external thread 11a of the shaft 11 in such a manner that the disc 3 and the ring 9 are separately sandwiched between the seven ring portion 28a of the sleeve 28 and the nut 25. The pipe 27 slightly protrudes from the end face of the Hiramic pin 7 and connects to J3.
As a result, between the ring 9 and the ceramic bottle 7 and between the disk 3 and the bottle 7, the 7-ring portion 2 of the sleeve 28 is disposed.
A gap S corresponding to the protruding portion of the pipe 27 and the pipe 8a is provided.

According to the cage mill of the present invention, the disk side is the power side and the ring side is moved by the disk side, causing torsion between the shaft and the ceramic bottle. Since the shaft is made of metal, the moment is alleviated, but in the case of ceramic bottles, the presence of adhesive and a stopper mechanism allows the torsional stress to be alleviated and prevent the ceramic from cracking.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view showing an example of a cage mill according to the present invention, Fig. 2 is a schematic vertical sectional view showing the inside of the cage mill shown in Fig. 1, and Fig. 3 is a view taken along the line x-X in Fig. 2. A schematic sectional view, FIG. 4 is an enlarged sectional view of the pin and its related parts in FIG. 2, and FIGS. 5 to 9 are views corresponding to FIG. 4, each showing a modification of the present invention. ′! FIG. 1 is a sectional view. 1...Base 2...Casing 3.4...Disc 5.6...Drive shaft 7.8... Ceramic bottle 9.10...Ring 11.12...Shaft 13.14...Nut S...Gap agent Valve 1! I! -1-DI side Removal Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 'q'S Fig. 7

Claims (1)

[Claims] A cage mill that includes a casing, a disc that rotates within the casing, a number of shafts that are attached to the disc at equal intervals and concentrically, and a ring that is attached to the tip of the shaft, and the shaft is made of ceramic. A cage mill characterized in that a ceramic bottle is lined with adhesive and a stopper mechanism is provided to prevent direct contact between the disk and the ceramic pin or the ring and the ceramic pin.