CN221965589U - A water spray device for raw material vertical mill - Google Patents

Abstract

The utility model discloses a water spraying device for a raw material vertical mill, which belongs to the technical field of vertical roller mills and comprises an outer water spraying pipe and an inner water spraying pipe concentrically arranged in the outer water spraying pipe, wherein the inner water spraying pipe is movably arranged in the outer water spraying pipe, water spraying ports are arranged on the outer water spraying pipe and the inner water spraying pipe, and the water spraying ports on the inner water spraying pipe and the outer water spraying pipe correspond to each other.

Description

A water spray device for raw material vertical mill

Technical Field

The utility model relates to the technical field of vertical roller mills, in particular to a water spraying device for a raw material vertical mill.

Background Art

In vertical roller mill, the motor drives the grinding disc to rotate through the reducer. After the material is fed, it falls in the center of the grinding disc. At the same time, the hot air from the kiln exhaust gas enters the mill from the air inlet. The grinding disc rotates, and the centrifugal force causes the material to move to the edge, and then it is crushed by the grinding roller and further crushed. During this period, a lot of heat will be generated. The crushed material is carried by the high-speed airflow at the edge of the grinding disc, and the large particles will fall on the grinding disc for re-grinding. When the material in the airflow passes through the upper separator, the coarse powder falls from the cone bucket to the grinding disc for re-grinding under the action of the rotating rotor. The qualified fine powder is discharged from the mill with the airflow and collected by the dust collection device, which is the product.

The water spray device for the vertical mill has two main functions during this period. Generally speaking, one is to reduce the temperature inside the mill, and the other is to stabilize the material layer by increasing the water content. Heat is generated during grinding, and the exhaust gas from the kiln tail also has a lot of heat. The material layer will form dust when it moves, and the amount of water sprayed must also be controlled to ensure that the mill vibrates smoothly during grinding after the roller is lowered.

Usually, the vertical mill water spray device is only equipped with a valve switch to determine the amount of water sprayed, and the water outlet angle cannot be adjusted, resulting in a limited water spray range, failure to spray water evenly onto the grinding disc, and failure to mix water evenly with the abrasive, thus affecting the vertical mill processing effect.

Utility Model Content

Technical purpose: In view of the shortcomings of the above-mentioned existing vertical mill water spraying device, the utility model discloses a raw material vertical mill water spraying device which can flexibly adjust the water spraying angle.

Technical solution: To achieve the above technical objectives, the utility model adopts the following technical solution:

A water spray device for a raw material vertical mill comprises an outer water spray pipe and an inner water spray pipe concentrically arranged inside the outer water spray pipe, wherein the inner water spray pipe is movably arranged inside the outer water spray pipe, and water spray ports are arranged on both the outer water spray pipe and the inner water spray pipe, and the water spray ports on the inner water spray pipe correspond to those on the outer water spray pipe.

Preferably, the end of the inner water spray pipe of the utility model is connected to a movable shaft, one end of the inner water spray pipe connected to the movable shaft adopts a closed structure, and the other end is connected to a water source. The inner water spray pipe is driven by the movable shaft to move axially forward and backward on the outer water spray pipe to adjust the water spray angle.

Preferably, the movable shaft of the utility model is connected to the driving end of the stepping screw lifting motor, and the movable shaft and the connected inner water spray pipe are driven to move up and down by the stepping screw lifting motor.

Preferably, the external water spray pipe of the utility model is fixed on the vertical mill in the vertical direction by a fixing frame welded on the pipe wall, and the water spray port faces the side where the interior of the vertical mill is located.

Preferably, the water spray outlets of the utility model are evenly arranged along the axial direction of the outer water spray pipe.

Beneficial effect: The utility model provides a water spray device for a raw material vertical mill. By moving an inner water spray pipe concentrically arranged inside an outer water spray pipe, the water spray outlets of the two water spray pipes are driven to produce a position difference in the axial direction, thereby flexibly adjusting the water outlet direction of the water spray, ensuring the uniformity of the water spray and achieving stability of the internal material layer during vertical mill processing.

BRIEF 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 required for use in the embodiments or the description of the prior art are briefly introduced below.

Figure 1 is a schematic diagram of the structure of the water spray device of the utility model;

Among them, 1-external water spray pipe, 2-inner water spray pipe, 3-water spray port, 4-movable axis, 5-fixed frame.

Implementation

The present invention will be described more clearly and completely below by way of a preferred embodiment in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiment.

As shown in Figure 1, a water spray device for a raw material vertical mill disclosed by the utility model comprises an outer water spray pipe 1 and an inner water spray pipe 2 concentrically arranged inside the outer water spray pipe 1. The outer water spray pipe 1 is fixed to the vertical mill in a vertical direction by a fixing frame 5 welded to the pipe wall, and a water spray port 3 faces the side where the interior of the vertical mill is located. The inner water spray pipe 2 is movably arranged inside the outer water spray pipe 1. The outer water spray pipe 1 and the inner water spray pipe 2 are both provided with water spray ports 3. The inner water spray pipe 2 and the water spray ports 3 on the outer water spray pipe 1 correspond to each other. Preferably, the water spray ports 3 are evenly arranged along the axial direction of the outer water spray pipe 1.

The end of the inner water spray pipe 2 of the utility model is connected to a movable shaft 4. One end of the inner water spray pipe 2 connected to the movable shaft 4 adopts a closed structure, and the other end is connected to a water source. The movable shaft 4 drives the inner water spray pipe 2 to move axially forward and backward on the outer water spray pipe 1 to adjust the water spray angle.

Since the purpose of axially dislocating the two water spray outlets is to create a position difference between the inner and outer water spray outlets, when water is sprayed out through the water spray hole of the inner water spray pipe 2, the sprayed water mist will also move up and down synchronously according to the moving direction of the inner water spray pipe, so that the angle and direction of water output can be controlled, thereby controlling the moisture content of materials at different positions in the vertical mill and reducing the local temperature, especially at the hot air inlet.

In order to facilitate accurate control of the movement accuracy, the movable shaft 4 of the utility model is connected to the driving end of the stepping screw lifting motor, and the movable shaft 4 and the connected internal water spray pipe 2 are driven up and down by the stepping screw lifting motor. The movable shaft 4 can be directly connected to the lifting screw thread of the stepping screw lifting motor to drive it to move up and down.

Normally, when the grinding roller of a vertical mill is working, its contact surface with the grinding disc is on the outside. From the outside to the inside, the outer side of the grinding roller wears due to long-term friction, and the contact surface moves inward. At the same time, if the material flow remains unchanged, the outer layer of the material will be unstable due to the reduction of the contact surface, and it is easy to form a dust belt; in the later stage of the use of the whole mill, the grinding roller is seriously worn, especially the outer contact surface will be worn out due to the long-term friction with the grinding disc, resulting in a gap with the inner contact surface. When the outer side is worn to a large extent, a height difference is formed with the inner side. The traditional fixed type of water spraying device cannot be used. The water spraying range cannot be adjusted, and the water cannot be sprayed evenly on the grinding disc and cannot be evenly mixed with the abrasive particles; the utility model can adjust the direction of water spraying to spray water directly on the friction surface between the grinding roller and the grinding disc, so that the water can be evenly dispersed on the grinding disc under the action of the rotating centrifugal force generated by the relative movement of the grinding roller and the grinding disc, and finally achieve uniform mixing of water and materials, and stabilize the material disc.

The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (5)

1. The utility model provides a raw materials is water jet equipment for vertical mill, its characterized in that includes outer spray pipe (1) and concentric interior spray pipe (2) that set up in outer spray pipe (1), interior spray pipe (2) mobilizable setting is in outer spray pipe (1), all set up water jet (3) on outer spray pipe (1) and the interior spray pipe (2), interior spray pipe (2) are corresponding with water jet (3) on outer spray pipe (1).

2. The water spraying device for the raw material vertical mill according to claim 1, wherein the end part of the inner water spraying pipe (2) is connected with a movable shaft (4), one end of the inner water spraying pipe (2) connected with the movable shaft (4) adopts a closed structure, the other end of the inner water spraying pipe is communicated with a water source, and the movable shaft (4) drives the inner water spraying pipe (2) to move back and forth on the outer water spraying pipe (1) along the axial direction to adjust the water spraying angle.

3. The water spraying device for the vertical mill for raw materials according to claim 2, wherein the movable shaft (4) is connected with the driving end of a stepping screw lifting motor, and the movable shaft (4) and the connected inner water spraying pipe (2) are driven to move up and down by the stepping screw lifting motor.

4. A water spraying device for a vertical mill for raw materials according to claim 1, characterized in that the outer water spraying pipe (1) is fixed on the vertical mill in the vertical direction by a fixing frame (5) welded on the pipe wall, and the water spraying port (3) faces to the side of the vertical mill.

5. A water jet device for a raw material vertical mill according to claim 1, characterized in that the water jets (3) are evenly arranged in the axial direction of the outer water jet pipe (1).