CN2488592Y - Super fine crushing machine with multi layer centrifugal collition - Google Patents

Abstract

The utility model relates to a multi-layer centrifugal colliding superfine pulverizer, which comprises a motor, a grading impeller, a pulverizing impeller and a material throwing tray; , connected with the motor through a flexible coupling, a discharge chamber is provided on the top of the classifying impeller, and a feeding pipe is provided on one side of the lower crushing chamber. For the air intake chamber. The superfine pulverizer has large collision force, strong crushing capacity, fine product particle size, stable machine operation, small vibration, easy replacement of wear parts, and convenient maintenance.

Description

Multi-layer centrifugal collision ultrafine pulverizer

The utility model relates to a multi-layer centrifugal colliding superfine pulverizer, which belongs to the technical field of pulverizing equipment widely used in industries such as chemical industry, building materials, metallurgy and non-metallic mines.

There are many ballless mills that have appeared in recent years, but they have not been widely used. The reason is that the particle size of the powder is not fine enough, the output is low, and the energy consumption is high. The process of crushing materials in this type of mill is that the materials fall on the throwing tray, and after being thrown out, they collide with the lining board around the grinding chamber, and the fragments (ie fine particles) splash and collide with the lining board or other particles. Since the kinetic energy of the fine particles of debris has been greatly reduced at this time, the force for further collision is very small, and the probability of collision is also reduced. The function of this type of mill to crush materials is to rely on collision. Only by increasing the probability of collision and increasing the force of collision can the fineness and output of powder be improved.

The purpose of this utility model is to design a multi-layer centrifugal collision ultra-fine pulverizer, so that the collision force of granular materials is increased, the collision probability is improved, the crushing ability is enhanced, the particle size of the powder is thinner, so as to increase the output and the energy utilization rate is high. .

The multi-layer centrifugal colliding superfine pulverizer designed by the utility model includes a motor, a grading impeller, 1-4 crushing impellers and a material throwing tray; the grading impeller, crushing impeller and the throwing tray are fixed from top to bottom in sequence On the main shaft of the pulverizer, the main shaft is fixed on the upper and lower bearing seats, and is connected with the motor through a flexible coupling. There is a discharge chamber on the top of the grading impeller, and a feeding pipe on one side of the lower pulverization chamber. The lower crushing chamber is polygonal, with lining boards on the side walls, corner lining boards are installed at the intersection of the two sides of the polygon, and the lower side of the crushing chamber is the air inlet chamber.

In the above-mentioned pulverizer, 6-24 pieces of throwing material are arranged on the periphery of the throwing tray, and 4-24 horizontal airflow injection holes are arranged in the middle. 4-24 crushing rods evenly protrude from the periphery of the crushing impeller, and the ends of the crushing rods are equipped with wear-resistant blocks. The shape of the grading impeller is rounded truncated or flat.

The multi-layer centrifugal colliding superfine pulverizer designed by the utility model has the following advantages:

1. There are a number of injection holes in the middle of the throwing tray, which can quickly accelerate the material particles falling from the feeding port to increase the initial speed of the centrifugal acceleration of the material. The speed of the material being thrown out of the disk by the throwing block is as high as 150 m/s, and it flies to the liner, the impact force is large, and the crushing capacity is enhanced.

2. The gas circulation corner liner installed on each corner of the polygonal crushing chamber can reduce the reactive power loss of particle movement, improve the efficiency of effective collision, and increase the collision force.

3. The function of crushing impeller is as follows:

1) Grading effect. The crushed material particles of different sizes move from bottom to top under the airflow of the induced draft fan. When encountering the high-speed rotating crushing impeller, due to the different quality of the particles themselves, the state of motion changes, and the small-sized particles have a small mass, a small centrifugal force, and a high speed of being pushed up by the airflow, so they pass through the crushing The impeller enters the upper crushing area; while the coarser particles have a large mass, the speed of upward movement is small, and they are subjected to a large centrifugal force, so they are thrown to the edge of the crushing chamber and fall.

2) Crushing effect. The coarser particles from below are hit by the highly rotating crushing rod due to their slow upward movement. At the same time, the coarser particles that are centrifugally thrown to the periphery by the crushing rod hit the liner and are crushed. Under the centrifugal action, the coarser particles of the impeller fall along the edge and are hit by the crushing rod of the next stage, so that these coarser particles can achieve the effect of further crushing.

Therefore, the crushing impeller is set to greatly increase the probability of particle collision, and the crushing ability of the machine is greatly improved.

4. The crushing rod of the crushing impeller and the wear-resistant block at the end can be disassembled from the inspection hole of the crushing chamber, which is convenient for maintenance, shortens the replacement time of wearing parts, and improves the output.

5. The upper and lower ends of the main shaft are fixed on the bearings, so that the movement of the whole machine is stable, safe and reliable.

The advantages of the multi-layer centrifugal colliding ultra-fine pulverizer designed by the utility model are that the collision probability of material particles is high, the collision force is large, the crushing ability is strong, the particle size of the product is fine, the particle size of the powder can be adjusted to 2 μm, and the output is high. The energy utilization rate is high, the machine runs stably, the vibration is small, the wearing parts are easy to replace, and the maintenance is convenient.

Description of drawings:

Fig. 1 is a schematic structural view of the multi-layer centrifugal collision ultra-fine pulverizer designed by the utility model.

Below in conjunction with accompanying drawing, describe the content of the present utility model in detail.

In Figure 1, 1 is the adjustment foot, 2 is the triangular base, 3 is the air inlet chamber, 4 is the lower crushing chamber, 5 is the feeding pipe, 6 is the upper crushing chamber, 7 is the inspection hole, 8 is the lower bearing seat, 9 10 is a throwing material block, 10 is a throwing tray, 11 is a liner, 12 is a corner liner, 13 is a wear-resistant block, 14 is a crushing rod, 15 is a crushing impeller, 16 is a discharge port, 17 is a grading impeller, 18 It is a discharge chamber, 19 is a fan impeller, 20 is an upper bearing seat, 21 is a motor support, 22 is a shaft coupling, 23 is a motor, 24 is a pulverizer main shaft, 25 is a deflector, and 26 is an injection hole.

As shown in Figure 1, the multi-layer centrifugal collision superfine pulverizer designed by the utility model includes a motor 23, a classifying impeller 17, 1-4 pulverizing impellers 15 and a material throwing tray 10. The grading impeller 17, the crushing impeller 15 and the throwing disc 10 are sequentially fixed on the main shaft 24 of the pulverizer from top to bottom. A discharge chamber 18 is arranged above the grading impeller 17, and a feeding pipe 5 is arranged on one side of the lower crushing chamber 4. The lower crushing chamber 4 is polygonal, and the side wall is equipped with a liner 11, and the intersection of the two sides of the polygon is equipped with a Angle liner 12, the bottom of the lower crushing chamber is the air inlet chamber 3.

In the above-mentioned pulverizer, 6-24 pieces of throwing material 9 are arranged on the periphery of the throwing tray 10, and the middle part is provided with a horizontal airflow injection hole 26, totally 4-24. Wherein the pulverizing impeller 15 periphery evenly stretches out 4-24 root pulverizing rods 14, and the end of pulverizing rods is equipped with wear-resistant block 13. The shape of the grading impeller 15 is rounded truncated or plane.

The utility model is achieved through the following design proposals.

An air inlet chamber is arranged below the triangular machine base, and a bearing seat is arranged in the center of the air inlet chamber. The lower end of the main shaft is inserted into the lower bearing seat, the upper end passes through the upper bearing seat, and is connected with the motor through a flexible coupling. The double bearings make the machine run stably. The motor can be installed on the top or the bottom of the lower bearing seat, which can make the machine run more stably. The first crushing chamber is fixed above the air inlet chamber, and the second crushing chamber is fixed above it through the flange. The crushing chamber is a regular polygon with 6 to 24 sides, surrounded by liners of the same regular polygon, and each corner of the polygon is equipped with a gas circulation corner liner. The lower end of the main shaft is equipped with a throwing tray with 4 to 24 pieces of throwing blocks fixed around it, which separates the air chamber from the first crushing chamber. Along the main shaft, 1 to 4 layers of pulverizing impellers with 4 to 24 pulverizing rods (with wear-resistant blocks installed at the ends) evenly protruding from the periphery are arranged sequentially above the material rejection tray. They divide the crushing chamber into several crushing areas from bottom to top, and undertake the dual functions of crushing and grading. The uppermost outlet of the second crushing chamber is equipped with a grading impeller, above which is a discharge chamber equipped with a fan impeller, with a discharge port on the side. Both the crushing chamber and the bearing are cooled by cooling water.

The triangular base 2 equipped with three level adjusting feet 1 is connected with the lower crushing chamber 4, and an air inlet chamber is formed between the two. The lower pulverizing chamber that feed pipe is housed is regular polygon, and lining board 11 is equipped with on every side, and angle lining board 12 is installed on every angle. An inspection hole 7 is provided on the side of the upper crushing chamber 6 connected with the lower crushing chamber through a flange. It is inserted into the main shaft of the lower bearing seat 8, and the lower part of the lower crushing chamber is fixed with a throwing tray 10, and 6 to 24 throwing blocks 9 are installed around the periphery, and there are several airflow injection ports 26 in the middle, and the main shaft 24 is fixed in series on the main shaft 24. 1 to 4 layers are equipped with the pulverizing impeller 15 of several pulverizing rods 14 and wear-resistant block 13. The upper outlet of the upper crushing chamber 6 is equipped with a classifying impeller 17, and the discharge chamber 18 above the upper crushing chamber is equipped with a fan impeller 19, and the side is a discharge port 16. The upper bearing seat 20 is installed in the bottom center of the motor support 21, and the pulverizer main shaft 24 is connected with the motor 23 through a flexible coupling 22.

The working process of the multi-layer centrifugal colliding superfine pulverizer of the utility model is as follows.

Materials with a particle size of less than 20mm enter the throwing tray from the feeding port, and under the action of the horizontal jet airflow and centrifugal force from the middle of the tray, they accelerate quickly and collide with the liner at a speed of more than 150 m/s to be crushed. At the same time, it also hits the coarser powder thrown down by the centrifugal separation of the upper grading impeller or the crushing impeller, and the tangential direction and circular flow particles directly hit the corner liner; the strongly broken particles splash around, collide with each other, and are subject to shearing, Crushed by various forces such as friction. Under the action of the airflow of the induced draft fan, the particles move upwards, and the fine particles are light in weight, subject to little centrifugal force, and move upward at a high speed, so they can easily pass through the first layer of crushing impellers and enter the second crushing zone. Coarse particles are heavy in weight, move upward at a low speed, and are subjected to strong centrifugal force. They are hit by the crushing rod and are thrown around to hit the liner or hit other particles. The coarser particles fall from the edge to the first crushing chamber and then Shattered by impact. Since the diameter of the second crushing chamber is slightly larger than that of the first crushing chamber, the wind speed decreases, and only the finer particles can pass through the second layer of crushing impellers and enter the second crushing zone, and the slightly coarser particles rise slowly and are hit, and are impacted. The effect of the centrifugal force is thrown to the surroundings and falls, and is hit by the lower layer of crushing rods. In this way, the powder reaches the classifying impeller, and the particles whose particle size and fineness meet the requirements pass through the classifying impeller and enter the discharge chamber to be discharged from the discharge port.

Claims (4)

1. A multi-layer centrifugal collision ultra-fine pulverizer, characterized in that the pulverizer includes a motor, a grading impeller, 1-4 pulverizing impellers and a throwing tray; the grading impeller, pulverizing impeller and throwing tray It is fixed on the main shaft of the pulverizer from top to bottom in turn. The main shaft is fixed on the upper and lower bearing seats and connected with the motor through a flexible coupling. There is a feed pipe, the lower crushing chamber is polygonal, the side wall is equipped with lining boards, and the corner lining boards are installed at the intersection of the two sides of the polygon, and the lower side of the crushing chamber is the air inlet chamber. 2. The pulverizer according to claim 1, characterized in that 6-24 throwing blocks are installed on the periphery of the throwing tray, and 4-24 horizontal air jet holes are arranged in the middle. 3. The pulverizer according to claim 1, characterized in that 4-24 crushing rods protrude evenly from the periphery of the crushing impeller, and the ends of the crushing rods are equipped with wear-resistant blocks. 4. The pulverizer according to claim 1, characterized in that, the shape of the grading impeller is rounded truncated or plane.

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