JPS6351958A - Crushing method and crusher - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulverizing method and a pulverizing device, and in particular to a pulverizing method and device that can perform pulverization with less power consumption than known pulverizing mills and the like, and which causes less wear and tear on the device. It is.

Conventionally, crushing methods and devices for obtaining finely pulverized materials include, for example, a crushing method and device that utilizes friction between a grinding member and crushed materials, and a crushing method and device in which crushed materials are carried by high-speed airflow and collide with each other. Although such devices are known, the former has a large grinding capacity but has the drawbacks of high power consumption and wear of the device, while the latter has the disadvantage of a small grinding capacity.

Therefore, recently, a crushing method using a high-frequency vibrator has been attracting attention as a method that can eliminate both drawbacks. In a crushing device that uses a high-frequency vibrating body, there is no so-called crushing movement between the crushed material and the grinding member, so there is less wear on the grinding member. This is because they have great ability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a grinding method and apparatus that utilize a high-frequency vibrator and high-speed airflow, consume less power, have less equipment wear, and have a large grinding capacity.

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

In the accompanying drawings, reference numeral 1 denotes an ultrasonic vibration horn that vibrates at a high frequency in the direction of arrow A in the figure, and the horn 1 is connected to a booster 2 and supported by the booster 2 in a cantilevered manner.

The booster 2 is housed in a casing 3 of the ultrasonic vibration device and is electrically connected to an oscillation control device 5 outside the casing 3 via an electric wiring 4. The housing 3 is a cylindrical crushing chamber main body 7
It is fastened with bolts 16 to a stand 9 that supports it.

The crushing chamber main body 7 has a hole for inserting the ultrasonic vibration horn 1 therein, a passage 7a for a high-speed particle flow to be blown onto the tip surface of the ultrasonic vibration horn 1, and a passageway 7a for carrying the crushed material after crushing. It has a crushed material discharge passage 7b for discharging the crushed material.
A discharge pipe 8 integrated with the crushing chamber main body 7 communicates with the crushed material discharge passage 7b. In the crushing chamber main body 7, the tip of the ultrasonic vibration horn 1 is arranged at the confluence of the high-speed crushed material flow passage 7a and the crushed material discharge passage 7b, and the tip surface of the horn 1 is located directly in line with the high-speed crushed material flow. It is directed against the enemy.

A high-speed fracturing wave forming device 11 in the form of a venturi nozzle is fastened to one end surface of the crushing chamber main body 7 with a bolt 12, and an O-ring 15 is provided on the end surface of the device 11 to prevent leakage. It is being High-speed fracturing wave forming device 1
1 is formed with a venturi-shaped passage having a throat portion 17, and a powder feed hole 18 is formed in the downstream position of the throat portion 17, which communicates with the passage. Therefore, the passage downstream of the opening position of the crushed material supply hole 18 is a passage for high-speed crushed material flow, and the passage from the opening position of the crushed material supply hole 18 to the throat portion 17 is a passage for high-speed air flow. It becomes.

A crushed material supply pipe 10 communicating with the crushed material supply hole 18 is attached to the high speed fracturing wave forming device 11, and crushed material M is supplied to the crushed material supply hole 18 through the crushed material supply pipe 10.

A gas supply pipe 13 for supplying high-pressure gas is fastened with a bolt 14 to the end face of the throat part 17 of the high-speed fracturing wave forming device 11, and high-pressure gas is introduced into the throat part 17 from within the gas supply pipe 13. .

In the crusher of this embodiment having the structure as described above, the ultrasonic vibration horn 1 is moved by the arrow A by the ultrasonic vibration generator inside the housing 3.
When high-pressure gas is supplied from the gas supply pipe 13 to the Pentieri-shaped passage in the high-speed crushed material flow forming device 11 while vibrating in A high-speed particle flow is formed in the passage 7a of the main body 7, and the high-speed particle flow violently collides with the tip surface of the ultrasonic vibration horn 1. At this time, the crushed material collided with the tip surface of the ultrasonic vibrating horn 1 is subjected to an acceleration reaching a maximum G (gravitational acceleration), and is crushed by the violent impact. The pulverized material is then discharged to the outside of the pulverizer through the pulverized material discharge passage 7b and the discharge pipe 8.

As described above, in the method and apparatus of the present invention, a high-speed debris flow collides with the surface of a high-frequency vibrating body, and a severe impact caused by the collision of the high-speed debris flow against the high-frequency vibrator is superimposed with the high-frequency vibration of the high-frequency vibrator. Since the powder is crushed by applying an impact force to the powder, it does not require large power consumption like conventional grinding type grinding equipment, and also eliminates the large amount of wear that occurs with conventional grinding equipment. The powder can be efficiently finely pulverized without causing any generation.

It should be noted that the above-mentioned embodiment is merely an illustration of one embodiment of the present invention, and it is clear that the above-mentioned embodiment does not limit the present invention. Therefore, when carrying out the present invention, the method and device for forming a high-speed particle flow, the shape and arrangement of the high-frequency vibration horn, the shape and arrangement of the grinding chamber main body, etc. are not limited to the above embodiments, and may be varied. It is possible to transform and modify.

[Brief explanation of the drawing]

The accompanying drawing is an overall view showing an example of a crushing apparatus for carrying out the crushing method according to the present invention. 100. Ultrasonic vibration horn 2.・、Booster 3...
Housing 7... Grinding chamber main body 8... Discharge pipe 9... Stand 10... Grinding material supply pipe 11... High speed grinding material flow forming device 13... Gas supply pipe

Claims (1)

[Claims] 1. The crushed material is crushed by colliding the crushed material carried by a high-speed air flow with the tip surface of an ultrasonic vibrating horn from a direction substantially directly opposite to it, and the crushed material is exposed to the ultrasonic wave. A pulverization method characterized in that the high-speed airflow is discharged in a direction bent at least 90 degrees toward the ultrasonic vibration horn from the inflow direction of the high-speed airflow into the vibrating horn, and in a radial direction centered on the streamline of the high-speed airflow. 2. An ultrasonic vibrating horn whose tip surface serves as a collision surface for crushed materials; a high-speed crushed material flow forming device for blowing crushed materials at high speed from a direction substantially directly facing the tip surface of the ultrasonic vibrating horn; At a place where the tip surface of the ultrasonic vibration horn is arranged, it is arranged so as to face in a direction forming an angle of at least 90° toward the ultrasonic vibration horn from the direction in which the material is blown onto the tip surface of the ultrasonic vibration horn. A pulverizing device comprising: a pulverizing chamber body having a pulverized material discharge passage arranged in a radial direction with respect to the pulverized material blowing direction; 3. The crushing device according to claim 2, wherein the high-speed particle flow forming device has a venturi nozzle and a particle supply hole opened on the discharge side of the venturi nozzle.