JPS644438Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pulverizer, and in particular, to a pulverizer suitable for obtaining finely pulverized products.

It is thought that the best method of pulverization for producing finely pulverized materials is to increase the friction and number of collisions between the pulverized materials. It is necessary to confine the crushed material in as narrow a space as possible, give the crushed material as much forceful motion as possible, and increase the mutual frictional movement between the crushed material and the hard surface of the crusher.

The purpose of this invention is to provide a pulverizer that can realize the above-mentioned state and is suitable for producing finely pulverized products; Our goal is to provide a highly reliable crusher.

An embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 denotes a vertically arranged crushed material supply pipe, and the crushed material supply pipe 1 is rotatably supported by a bearing 3 of a crusher frame 2 at an intermediate portion thereof. The lower end cylindrical part of the crushed material input hopper 4 fixed to the crusher frame 2 is inserted into the upper end of the crushed material supply pipe 1, and the lower part of the crushed material supply pipe 1 has a substantially inverted conical crusher. The containers 5 are connected together. A driven V-belt pulley 6 is fitted near the upper end of the crushed material supply pipe 1, and the crushed material supply pipe 1 and the crushing container 5 are connected to a V-belt 7 that drives the driven belt pulley 6, a driving V-belt pulley 8, and motor 9
It is designed to be rotationally driven by a drive device consisting of.

The crushing container 5 has an inverted conical upper part 5A whose inner diameter uniformly decreases downward from the upper end, and a lower part 5B whose inner diameter uniformly decreases upward from the lower end. . A flange portion 1A integrated with the crushed material supply pipe 1 is fastened to the upper end of the crushing container 5 so as to serve as a lid of the crushed material supply pipe 1, and the crushed material supply pipe 1 and the crushed material container 5 are integrated via the flange portion 1A. has been done. The crushed material supply pipe 1 is inserted into the upper portion 5A of the crushing container 5, and the lower end opening of the crushed material supply pipe 1 is arranged at the center of the smallest inner diameter part within the crushing container 5.

The lower end of the crushing container 5 is open, and a truncated conical vibrating table 10 is inserted into the opening at the lower end of the crushing container 5 from below. Vibration table 1
A crushing gap g is formed between the outer circumferential surface of the container 0 and the inner circumferential surface of the lower part 5B of the crushing container, and the crushed material is crushed in this gap g. The cone angle on the outer peripheral surface of the vibration table 10 (that is, the angle formed by the generatrix of the outer peripheral surface of the vibration table with respect to the central axis of the vibration table 10) is designed to be larger than the cone angle on the inner peripheral surface of the lower part of the crushing container. The gap g becomes narrower as it approaches the lower end of the vibration table 10.

A paddle 11 is removably attached to the inner circumferential surface of the crushing container 5 from the smallest diameter portion to the lower portion 5B. This paddle 11 is a member that forcibly pushes the crushed material in the crushing container into the gap g, and in this embodiment, a groove is formed in the inner circumferential surface of a truncated conical cylindrical body in the direction of its generatrix. It is constructed as a part formed with multiple strips, and by rotating the paddle 11 together with the crushing container, a strong stirring force is applied to the crushed material, and at the same time, the crushed material is pushed into the gap g through the groove of the paddle. act.

A vertical rod 12 for supporting the vibration table is integrally formed on the lower surface of the vibration table 10.
is a vibration generator 13 fixed to the crusher frame 2
is supported by The vibration generator 13 has a built-in known ultrasonic vibrator, and is connected via an electric wiring 15 to an oscillation control device 14 that excites the ultrasonic vibrator.

A crushed material receiving part 16 for receiving the crushed material discharged from the crushing container 5 is provided below the crushing container 5 and the vibration table 10, and the crushed material is passed through a discharge pipe 16A formed in the crushed material receiving part 16. is external container 1
It is designed to be stored in 7.

Next, the operation of the crusher and the operation of each part in the embodiment of the present invention having the above-described structure will be explained. First, the motor 9 is started to rotate the crushed material supply pipe 1 and the crushed container 5, while the oscillation control device 14 is operated to excite the ultrasonic vibrator in the vibration generator 13 and the crushed material supply pipe 1 and the crushed container 5 are rotated. Generates high frequency vibrations. In this case, the vibration generator 13 gives axial vibration to the rod 12, but the vibration of the rod 12 is transmitted to the vibration table 10.
Appears in the radial direction.

When the crushed material M is fed into the crushed material input hopper 4, the crushed material falls spirally inside the rotating crushed material supply pipe 1 while being subjected to centrifugal force, and finally falls onto the vibrating table 10 in the crushing container 5. to fall. The crushed material that has fallen onto the shaking table 10 is caused by the horizontal vibration of the shaking table 10.
After being dispersed almost evenly over the entire surface of the crushing container 5, it is strongly stirred by the paddle 11 that rotates together with the crushing container 5, and is collected in the groove of the paddle 11. Finally, by the action of the paddle 11, the vibration table 10 and the inner peripheral surface of the lower part 5B of the crushing container.

As described above, the outer circumferential surface of the vibrating table 10 vibrates in the radial direction, so the crushed material that has entered the gap g causes mutual frictional movement due to these vibrations, and also causes friction between the inner circumferential surface of the crushing container 5 and the vibrating table 10. At the same time, the particles collide with the outer circumferential surface of the grinding container 5 and undergo frictional movement due to the rotation of the grinding container 5, and as a result, they are ground into fine particles.

The crushed material m, which has been crushed so that it can pass through the minute gap between the lower end of the outer peripheral surface of the vibration table 10 and the lower end of the inner peripheral surface of the crushing container 5, falls into the crushed material receiver 16 and is then discharged. External container 17 through tube 16A
will be collected in

The effects of this idea are as follows.

Since the crushed material supply pipe 1 and the crushing container 5 are rotationally driven, there is no fear that the crushed materials become clogged in the crushed material supply pipe 1 and the crushing container 5, and stable operation can be performed.

In the crushing gap g, rotational motion and high-frequency vibration perpendicular to the rotating motion act simultaneously on the crushed material, so air currents are drawn into the crushed material and it becomes fluidized, so that the crushed material is crushed into fine particles without agglomeration. Ru.

Since the pulverization gap g becomes narrower from the top to the bottom, a shot pass of the pulverized material does not occur, and highly accurate pulverization can be performed.

Since the vibrating table 10 has a truncated conical shape and the inner peripheral surface of the crushing container 5 also has a conical surface, even if either of them wears out, the gap g can be easily adjusted.

As is clear from the above description, this invention provides a highly reliable pulverizer that can always produce finely ground products with stable precision.

In the above embodiment, only an example in which the paddle was formed as a cylindrical body or an annular body was shown, but it goes without saying that the paddle 11 does not have to be in the form of a cylindrical body or an annular body.

[Brief explanation of the drawing]

The accompanying drawings are schematic diagrams showing an embodiment of a crusher according to the present invention. 1... Grinding material supply pipe, 1A... Flange, 2...
Grinding frame, 3... Bearing, 4... Grinding material input hopper, 5... Grinding container, 9... Motor, 10... Vibration table, 11... Paddle, 12... Rod, 13...
...Vibration generator, 14...Oscillation control device, 15...
Electrical wiring, 16... Crushed material receiving section, 16A... Discharge pipe, 17... Container.

Claims (1)

[Scope of utility model registration request] A grinding container that has a lower portion whose inner diameter uniformly decreases upward from the lower end and is driven to rotate about its own vertical central axis, and an opening at the center of the minimum inner diameter of the grinding container. A crushed material supply pipe that rotates together with the crushing container; a paddle detachably attached to the inner peripheral surface of the lower portion of the crushing container; a space inside the paddle and a space inside the lower portion of the crushing container; A truncated conical vibration table whose outer diameter decreases uniformly from the lower end upwards and a high-frequency vibration generator that vibrates the vibration table at a high frequency. The crushed material supplied onto the vibrating table in the crushing container is pushed by the paddle into the gap between the outer peripheral surface of the vibrating table and the circumferential surface of the lower part of the crushing container, and a circle formed in the gap is A crusher characterized in that the crushed material is crushed by shearing force in the circumferential direction and vibration in the radial and axial directions.