CN115591632A

CN115591632A - Centrifugal ultrafine grinder

Info

Publication number: CN115591632A
Application number: CN202210860961.4A
Authority: CN
Inventors: 张方强; 丁志平; 夏纪勇
Original assignee: Hunan Guangyi Sci & Tech Co ltd
Current assignee: Hunan Guangyi Sci & Tech Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-01-13

Abstract

The invention relates to a centrifugal ultrafine grinder, which comprises a grinder body, a parabolic wheel, an impact wheel, a wear-resistant filler block, a material blocking ring and the like, and is characterized in that: the materials enter a grinding cavity of the grinder, are thrown by the parabolic wheel rotating at high speed, fly to the impact wheel which has opposite steering and also rotates at high speed, and the impact wheel performs counterattack on the materials, so that the materials and the materials are mutually impacted and ground between the two wheels. The crushed materials are brought to the classifying wheel through negative pressure gas, the materials meeting the fineness requirement are discharged together with the airflow through the classifying wheel, and the materials which do not meet the fineness requirement fall into the crushing cavity to be impacted again until the fineness requirement is met. The method is characterized in that: the parabolic wheel and the impact wheel rotate forward and backward at high speed to throw materials, so that the materials move at high speed and collide with each other to be crushed, mutual impact force between the materials is multiplied by the forward and backward rotation of the parabolic wheel and the impact wheel, the equipment abrasion is reduced, the product grade is improved, and the method is particularly suitable for ultrafine crushing of high-hardness materials.

Description

Centrifugal ultrafine grinder

Technical Field

The invention belongs to the field of ultrafine crushers, and particularly relates to a centrifugal crusher, in particular to a dry-method ultrafine centrifugal crusher, which can be suitable for medium-low-hardness materials and is more suitable for high-hardness materials; the superfine crusher can be applied to superfine powder processing in the aspects of nonmetal ores, metal powder, chemical products, novel materials, alloys and the like, and relates to the principle and the structure of a superfine crusher.

Background

The ultrafine grinding technology is an important subject of research of powder specialists at home and abroad, and the application fields of the ultrafine grinding technology comprise paper making, plastics, rubber, paint and coating, cosmetics, ceramics, novel materials and the like; the fineness range of the superfine grinding by mechanical processing is generally 5-45 mu m, and the hardness range is within Mohs 10 grade; the existing superfine processing equipment in the market comprises an airflow mill, a stirring mill, a planetary ball mill, a vertical mill, a ring roller mill, a vibration mill and the like;

at present, more or less fineness requirements of the devices on the market do not reach the standard; the yield is small, and the energy consumption is high; the wear-resistant finished product of the equipment has more impurities, and the cost of easily damaged parts is high; the defects of complex dehydration and pollution discharge process and the like after wet processing lead the research and development of the superfine industry to be limited; the invention provides a centrifugal ultrafine grinder, aiming at solving the problems in the industrial production of ultrafine powder, simplifying the process flow, improving the product grade and the like.

Disclosure of Invention

The invention adopts the high-speed forward and reverse rotating parabolic wheel and the impact wheel to throw the materials into the air, and utilizes the relative acting force and the counter acting force of the two wheels to lead the materials to be crushed by mutual impact under the condition of approximate rate, thereby reducing the mechanical abrasion and the ineffective abrasion and improving the grade of the product; the high-speed grinding ensures that the material reaches the fineness requirement in a short time, improves the working efficiency and reduces the energy consumption; the dry grinding simplifies the process flow and saves sewage treatment and discharge.

The invention relates to a centrifugal ultrafine grinder, which comprises a grinder body, a rack, a parabolic wheel, an impact wheel, a wear-resistant filler block, a material blocking ring, a grading wheel, a slag discharge port and the like, and is characterized in that: the top transmission device drives the grading wheel and the parabolic wheel to synchronously rotate, and the speed is adjustable. The bottom transmission device drives the impact wheel to rotate at a high speed, the rotating direction of the impact wheel is opposite to that of the parabolic wheel, and the speed is adjustable. The parabolic wheel and the impact wheel rotate at a high speed relatively to generate impact force to the materials and the materials collide with each other to crush the materials. The material enters a grinding cavity of the grinder through a feeding hole, is thrown up by a parabolic wheel rotating at a high speed, flies to an impact wheel rotating at the same high speed and having opposite steering directions, and impacts the material at the high speed to be ground, and simultaneously, the material and the material impact each other between two wheels to be ground. The acting force is derived from the impact force of the parabolic wheel and the impact wheel rotating positively and negatively on the materials and the mutual collision force among the materials, so that a better crushing effect is achieved. The crushed materials are brought to the grading wheel through negative pressure gas, the materials meeting the fineness requirement are discharged together with the air flow through the grading wheel, and the materials which do not meet the fineness requirement fall into the crushing cavity to be impacted again until the fineness requirement is met.

The pulverizer body is internally provided with a parabolic wheel and an impact wheel which rotate positively and negatively, and a group of acting forces in opposite directions are generated during working, so that the materials move at high speed in the grinding cavity to achieve the effect of instantaneous pulverization.

The parabolic wheel and the impact wheel are provided with a plurality of uniformly distributed wear-resistant filler blocks so as to overcome the abrasion of high-speed running materials and better protect the parabolic wheel and the impact wheel. The materials are broken by self under the condition of being thrown, sliding friction is avoided, iron increment in the material processing process is reduced, and the grade of the processed materials can be improved.

The material blocking ring is arranged, and the materials can be controlled to be crushed in the grinding cavity.

The base and the parabolic plate are provided with a plurality of air inlets; a special airflow channel is arranged between the striker plate and the impact wheel; the upper part is provided with a grading wheel, the external fan is utilized to enable the equipment to operate under negative pressure, and the materials are taken to a discharge hole after reaching the fineness requirement.

The lower machine body is provided with a slag discharge port which can discharge metal foreign matters mistakenly entering the machine body and non-broken material blocks which are not ground for a long time.

The invention achieves the following technical effects: 1. the traditional grinding or high-speed airflow crushing mode is changed, the materials are thrown by skillfully utilizing centrifugal force and are crushed by collision, so that energy consumption is reduced, mechanical iron increment is reduced, the grade of the product is improved, and the use cost of a wear-resistant part is reduced. 2. The material directly gets into crushing chamber from the feed inlet, is equipped with material blocking device at crushing intracavity, and the material gets into the organism from the feed inlet, can control it and accomplish in the grinding intracavity and smash, prevents that the material from scurrying in disorder and causing hourglass bits of broken glass and abnormal wear. 3. The special air inlet holes and the special air flow channels are arranged, so that materials meeting the fineness requirement can be timely milled, and the phenomenon of over-crushing is prevented. 4. The slag discharge port is arranged to discharge foreign matters, so that abnormal damage to the machine can be prevented.

The following is a further description in conjunction with the construction of a centrifugal ultrafine pulverizer.

FIG. 1 is a structural view of a centrifugal type ultrafine pulverizer; in the figure: 1-lower machine body 2-air inlet 3-frame 4-lower bearing seat 5-striking wheel transmission device 6-slag discharging device 7-material locking valve 8-striking wheel 9-parabolic wheel 10-wear-resistant lining block 11-material blocking ring 12-grading wheel 13-feeding device 14-upper machine body 15-parabolic wheel transmission device 16-discharging (air) port 17-air flow channel 18-air inlet hole.

Detailed Description

In the drawing, a bearing seat 4 and an impact wheel transmission shaft 5 are arranged on a frame 3 of the centrifugal ultrafine grinder, an impact wheel 8 is arranged on the upper part of the transmission shaft 5, and a wear-resistant filler block 10 is arranged on the impact wheel 8; a parabolic wheel transmission shaft 15 is arranged on the upper machine body 14, a grading wheel 16 and a parabolic wheel 9 are arranged on the transmission shaft 15, and a wear-resistant lining block 10 is arranged on the parabolic wheel 9; two groups of speed regulating motors drive the parabolic wheel 9 and the impact wheel 8 to rotate forward and backward at high speed. The materials enter the grinding cavity from the feed inlets 13-1 and 13-2 and are controlled by the material blocking ring 11-1 to be ground in the grinding cavity. The fine powder meeting the fineness requirement is carried to a discharging (wind) port 16 by an ascending air flow through a classifying wheel 12.

The bottom of the lower machine body 1 is provided with an air inlet 2, and fine powder can be brought to a discharge (air) port 16 by ascending air flow through a plurality of air inlet holes 18 and air flow channels 17 which are uniformly distributed on the impact wheel 8.

Metal foreign matters and long-term non-crushed blocks which enter the machine by mistake in the crushing process are brought out of the powder grinding cavity by the centrifugal force of the impact wheel 8 and are discharged from the slag discharge device 6, and the material locking valve 7 is closed when the equipment runs, so that slag can be discharged intermittently and periodically.

Claims

1. The invention relates to a centrifugal ultrafine grinder, which comprises a grinder body, a rack, a parabolic wheel, an impact wheel, a wear-resistant filler block, a material blocking ring, a grading wheel, a slag discharge port and the like, and is characterized in that: the top transmission device drives the grading wheel and the parabolic wheel to synchronously rotate, and the speed is adjustable; the bottom transmission device drives the impact wheel to rotate at a high speed, the rotating direction of the impact wheel is opposite to that of the parabolic wheel, and the speed is adjustable; the parabolic wheel and the impact wheel rotate at a relatively high speed to generate impact force to the materials and the materials collide with each other to crush the materials; the material enters a grinding cavity of the grinder from a feeding hole, is impacted by a parabolic wheel rotating at a high speed, flies to an impact wheel rotating at the same high speed and having opposite steering direction, the impact wheel performs counterattack on the material, the material is ground in high-speed impact, and simultaneously, the material and the material are mutually impacted and ground between the two wheels; the acting force is derived from the impact force of the parabolic wheel and the impact wheel rotating positively and negatively on the materials and the mutual collision force among the materials, so that a better crushing effect is achieved; the crushed materials are brought to the classifying wheel through negative pressure gas, the materials meeting the fineness requirement are discharged together with the airflow through the classifying wheel, and the materials which do not meet the fineness requirement fall into the crushing cavity to be impacted again until the fineness requirement is met.

2. A centrifugal ultrafine pulverizer as defined in claim 1, wherein: the equipment is provided with a parabolic wheel and an impact wheel which rotate positively and negatively, and a group of acting forces in opposite directions are generated during working, so that the materials move at high speed in the grinding cavity to achieve the effect of instant crushing.

3. A centrifugal ultrafine pulverizer as claimed in claims 1 and 2, characterized in that: the parabolic wheel and the impact wheel are provided with a plurality of uniformly distributed wear-resistant filler blocks to overcome the abrasion of high-speed running materials, so that the effect of crushing the materials is achieved, and the parabolic wheel and the impact wheel are better protected; the materials are mostly crushed by mutual impact under the condition of being thrown up, sliding friction is avoided, iron increment in the material processing process is reduced, and the grade of the processed materials can be improved.

4. A centrifugal ultra-fine pulverizer as defined in claim 1, wherein: the material stopping ring is arranged, so that the material can be controlled to be crushed in the grinding cavity.

5. A centrifugal ultra-fine pulverizer as defined in claim 1, wherein: the base and the parabolic dish are provided with a plurality of air inlets; a special airflow channel is arranged between the striker plate and the impact wheel; the upper part is provided with a grading wheel, the external fan is utilized to enable the equipment to run under negative pressure, and the materials meeting the fineness requirement are brought to the discharge hole while dust raising is prevented.

6. A centrifugal ultrafine pulverizer as defined in claim 1, wherein: the lower machine body is provided with a slag discharge port which can discharge metal foreign matters mistakenly entering the machine body and non-broken material blocks which are not ground for a long time.