CN219442007U - Vertical mill device for raw materials with stable material layers - Google Patents

Abstract

The utility model discloses a raw material vertical mill device with a stable material layer, wherein a central blanking cylinder coaxially arranged with a millstone is arranged right above the center of the millstone, the bottom end of the blanking cylinder of a powder selecting machine of the powder selecting machine is connected with the top end of the central blanking cylinder, and the blanking end of a feeding chute is communicated with the central blanking cylinder. The advantages are that: by arranging the central blanking cylinder, the material is directly led to the center of the millstone, so that the problem of uneven material layer caused by the fact that the material directly falls to the edge of the millstone is avoided; through setting up guide cone and division board, be favorable to the even dispersion of material more, be favorable to forming stable bed on the mill, easily stand the steady operation of mill. Through setting up annular striker, the material can form certain piling up in annular striker in the clearance between the central apron, and connecting bolt is covered by piled up material, forms the material dead zone promptly, can prevent that the material that flows from causing wearing and tearing connecting bolt.

Description

Vertical mill device for raw materials with stable material layers

Technical field:

the utility model relates to a raw material vertical mill device, in particular to a raw material vertical mill device with a stable material layer.

The background technology is as follows:

the raw material vertical mill is grinding equipment which is widely applied to the fields of cement, metallurgy and the like and integrates crushing, drying, grinding and grading, the structure of the grinding equipment is shown in figure 1, and the working principle is as follows: the materials fall onto the grinding disc 7 through the feeding chute 3, the grinding disc 7 rotates under the drive of the motor, and in the rotation process of the grinding disc 7, the materials move to the edge of the grinding disc 7 under the action of centrifugal force; simultaneously, grinding roller 4 rotates on mill 7 under the effect of hydraulic system pressure, and the material receives grinding of grinding roller 4, and the material after smashing overflows from mill 7 edge, and in the high-speed hot air current from nozzle ring 8 sent to the powder concentrator 1 that upper portion set up an organic whole, coarse powder was separated through powder concentrator 1 and is returned to mill 7 through powder concentrator 1 feed cylinder and grind again, and the fine powder was sent out the mill by the air current.

In the actual running process of the vertical mill, as the blanking end of the original feeding chute 3 is arranged above the grinding roller 4, the blanking end of the feeding chute 3 is far away from the grinding disc 7, and materials directly fall to the edge of the grinding disc below the roller way under the action of gravity after entering the mill. A stable material layer is not easy to form on the grinding disc 7, and the stable operation of the vertical mill is affected. Meanwhile, a central cover plate 5 is arranged at the center of the top surface of the grinding disc 7, and the edge of the central cover plate 5 is connected with the grinding disc 7 through a connecting bolt; in the process that the material moves to the edge of the grinding disc 7 under the centrifugal force action by the central cover plate 5, the connecting bolt connecting the central cover plate 5 and the grinding disc 7 is worn, and once loose or falls, the stable operation of the vertical grinding machine can be influenced by the connecting bolt. In addition, because the nozzle ring 8 is uniformly distributed on the periphery of the grinding disc 7 along the circumferential direction of the grinding disc 7, hot air entering from the lower part of the vertical mill is upwards sprayed out through the nozzle ring 8 and drives powder to move upwards, and the upward moving material can scour the grinding roller protective sleeve 6 and the grinding roller door sealing device above the nozzle ring 8, so that air leakage of the grinding roller door is caused, and the service life of the grinding roller door is seriously influenced.

The utility model comprises the following steps:

in order to solve the problems, the utility model aims to provide a raw material vertical mill device with stable material layers.

The utility model is implemented by the following technical scheme:

a raw material vertical mill device with a stable material layer is characterized in that a central blanking cylinder coaxially arranged with a grinding disc is arranged right above the center of the grinding disc, the bottom end of the blanking cylinder of a powder selecting machine of the powder selecting machine is connected with the top end of the central blanking cylinder, the blanking end of a feeding chute is communicated with the central blanking cylinder, and the distance between the bottom end of the central blanking cylinder and the grinding disc is 0.8-1.5 m.

Further, a conical material guiding cone which is coaxially arranged with the central cover plate is integrally arranged at the center of the central cover plate.

Further, a plurality of partition plates are uniformly arranged on the top surface of the central cover plate along the radial direction of the central cover plate.

Further, an annular stop ring which is coaxially arranged with the central cover plate is arranged on the periphery of a connecting bolt for connecting the central cover plate and the grinding disc.

Further, a blocking blind plate is arranged on the nozzle ring right below the grinding roller protective sleeve.

Further, a flexible sealing ring is arranged between the grinding roller and the grinding roller door, and a labyrinth sealing structure is arranged between the grinding roller and the grinding roller door at the inner side of the flexible sealing ring.

The utility model has the advantages that:

by arranging the central blanking cylinder, the material is directly led to the center of the millstone, so that the problem of uneven material layer caused by the fact that the material directly falls to the edge of the millstone is avoided; through setting up guide cone and division board, be favorable to the even dispersion of material more, be favorable to forming stable bed on the mill, easily stand the steady operation of mill. Through setting up annular striker, the material can form certain piling up in annular striker in the clearance between the central apron, and connecting bolt is covered by piled up material, forms the material dead zone promptly, can prevent that the material that flows from causing wearing and tearing connecting bolt. Through setting up shutoff blind plate, can avoid hot gas flow to directly blow grinding roller protective sheath and grinding roller door sealing device, and then reduced the material and to grinding roller protective sheath and grinding roller door sealing device's washing away, can prolong the life of grinding roller door. Through setting up double-deck sealed, labyrinth seal structure can play preliminary sealed effect to can play the guard action to flexible sealing washer, extension flexible sealing washer's life.

Description of the drawings:

in order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a conventional vertical mill;

FIG. 2 is a schematic diagram of the structure of the present embodiment;

FIG. 3 is a schematic view of the structure of the center cover plate, the guide cone and the partition plate in the present embodiment;

FIG. 4 is an enlarged partial schematic view of FIG. 2A;

FIG. 5 is a schematic diagram showing the positional relationship between the blind plugging plate and the nozzle ring in the present embodiment;

fig. 6 is a partially enlarged schematic view at B in fig. 2.

In the figure: powder concentrator 1, powder concentrator feed cylinder 2, feed chute 3, grinding roller 4, central apron 5, grinding roller protective sheath 6, mill 7, nozzle ring 8, central feed cylinder 9, guide cone 10, division board 11, annular striker 12, shutoff blind 13, flexible sealing washer 14, labyrinth seal 15.

The specific embodiment is as follows:

the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1:

the vertical mill device for raw materials with stable material layers is shown in fig. 2-6, a central blanking cylinder 9 which is coaxially arranged with the grinding disc 7 is arranged right above the center of the grinding disc 7, the bottom end of a blanking cylinder 2 of a powder selecting machine 1 is connected with the top end of the central blanking cylinder 9, the blanking end of a feeding chute 3 is communicated with the central blanking cylinder 9, and the distance between the bottom end of the central blanking cylinder 9 and the grinding disc 7 is 0.8-1.5 m. A conical material guiding cone 10 which is coaxially arranged with the central cover plate 5 is integrally arranged at the center of the central cover plate 5. A plurality of partition plates 11 are uniformly provided on the top surface of the center cover plate 5 in the radial direction thereof. The material directly falls to mill 7 from center feed cylinder 9, under the effect of guide cone 10, the material is quick by evenly dispersed and by entering into the edge of mill 7 between two adjacent division boards 11, so, avoided the material directly to the uneven problem of material layer that the mill 7 edge led to, through setting up guide cone 10 and division board 11, more do benefit to the even dispersion of material, be favorable to forming stable material layer on mill 7, easily stand the steady operation of mill.

The periphery of the connecting bolt connecting the central cover plate 5 and the grinding disc 7 is provided with the annular stop ring 12 which is coaxially arranged with the central cover plate 5, and materials can form certain accumulation in a gap between the annular stop ring 12 and the central cover plate 5 by arranging the annular stop ring 12, and the connecting bolt is covered by the accumulated materials, namely a material dead zone is formed, so that the flowing materials can be prevented from wearing the connecting bolt.

The blocking blind plate 13 is arranged on the nozzle ring 8 right below the grinding roller protective sleeve 6, so that the hot air flow directly blows the grinding roller protective sleeve 6 and the grinding roller door sealing device can be avoided, the scouring of materials to the grinding roller protective sleeve 6 and the grinding roller door sealing device is further reduced, and the service life of the grinding roller door can be prolonged. The blocking blind plate 13 reduces the flow area of hot air, so that the powder selecting effect of the powder selecting machine can be ensured by increasing the flow speed of air inlet or reducing the radius of the inner ring of the nozzle ring 8.

A flexible sealing ring 14 is arranged between the grinding roller 4 and the grinding roller door, a labyrinth sealing structure 15 is arranged between the grinding roller 4 and the grinding roller door at the inner side of the flexible sealing ring 14, the labyrinth sealing structure 15 can play a primary sealing effect, and can protect the flexible sealing ring 14, so that the service life of the flexible sealing ring 14 is prolonged.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (6)

1. The utility model provides a raw material vertical mill device that feed layer is stable, its characterized in that is equipped with directly over the mill center with the coaxial center blanking cylinder that sets up of mill, the selection powder machine blanking cylinder bottom of selection powder machine with the top of center blanking cylinder is connected, the unloading end of feed chute with center blanking cylinder intercommunication, the bottom of center blanking cylinder with the distance of mill is 0.8-1.5 meters.

2. A raw material vertical mill device with stable material layers according to claim 1, characterized in that a conical material guiding cone coaxially arranged with the central cover plate is integrally arranged at the center of the central cover plate.

3. A raw material vertical mill device with stable material layer according to claim 2, characterized in that a plurality of partition plates are uniformly arranged on the top surface of the central cover plate along the radial direction thereof.

4. The raw material vertical mill device with stable material layers according to claim 1, wherein an annular stop ring which is coaxially arranged with the central cover plate is arranged on the periphery of a connecting bolt connecting the central cover plate and the millstone.

5. A raw material vertical mill device with stable material layer according to claim 1, characterized in that a blocking blind plate is arranged on the nozzle ring directly under the mill roll protective sleeve.

6. A raw material vertical mill device with stable material layer according to claim 1, characterized in that a flexible sealing ring is installed between the mill roller and the mill roller door, and a labyrinth sealing structure is arranged between the mill roller and the mill roller door inside the flexible sealing ring.