CN215878162U

CN215878162U - Compression ring for liner plate of grinding disc of coal mill

Info

Publication number: CN215878162U
Application number: CN202120559614.9U
Authority: CN
Inventors: 吕利平; 刘磊
Original assignee: Baotou Iron and Steel Group Co Ltd
Current assignee: Baotou Iron and Steel Group Co Ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2022-02-22
Anticipated expiration: 2031-03-18

Abstract

The utility model discloses a coal mill millstone liner plate pressure ring which comprises a pressure ring, wherein bolt holes are evenly distributed in the pressure ring; the utility model provides a coal mill millstone liner plate pressure ring which is mainly used for solving mill accidents caused by fracture of millstone liner plate bolts of a coal mill. This novel clamping ring simple structure, simple to operate, easy operation, low in manufacturing cost, but cracked risk of greatly reduced bolt.

Description

Compression ring for liner plate of grinding disc of coal mill

Technical Field

The utility model belongs to the technical field of machinery, and particularly relates to a liner plate pressure ring of a grinding disc of a coal mill.

Background

At present, the grinding disc lining plate of the coal mill has 12 blocks, the lining plate is tightly pressed on a grinding disc through 24 blocks to work, when the mill works, the lining plate is under the action of impact force and circulating rolling force of the grinding roller, one side of the lining plate tends to tip, the blocks are in wedge-shaped contact with the side surface of the lining plate, and the friction force between contact surfaces provides impedance moment, namely, the 12 blocks of lining plate tightly press the lining plate on the grinding disc through the friction force formed by 24 concentrated force and 24 contact surfaces. Because the cyclic unstable load acts on 12 lining plates alternately, 24 bolts are stressed unevenly, the amount of the coal powder on the grinding disc is gradually reduced in the initial production stage and when the machine is about to stop, the change range of the impact load between the grinding roller and the lining plates is more severe, and the bolts are broken, so that the accident of the grinding machine is caused.

Accordingly, those skilled in the art have endeavored to develop a coal mill millstone liner ring that aims to reduce the risk of mill accidents caused by broken liner bolts by increasing the friction between the liner and the briquette.

SUMMERY OF THE UTILITY MODEL

In view of the problem that mill accidents are caused by breakage of bolts of the grinding disc lining plate of the existing coal mill due to unstable impact force, the utility model provides the grinding disc lining plate pressure ring of the coal mill for safe operation of a machine, which is used for increasing the friction force between the lining plate and the pressure ring and reducing the risk of breakage of the lining plate bolts, thereby solving the mill accidents caused by breakage of the bolts of the grinding disc lining plate of the coal mill. The device has the advantages of simple structure, convenience in installation, simplicity in operation and low manufacturing cost, and the risk of bolt fracture can be greatly reduced.

In order to achieve the purpose, the utility model provides a millstone liner pressure ring of a coal mill, which consists of a pressure ring.

Bolt holes are uniformly distributed on the compression ring;

furthermore, the pressing ring is in a ring shape, and the material is flat;

furthermore, the side surface of the pressure ring is an inclined surface, and the inclination of the inclined surface is matched with the inclined surface of the lining plate for use;

furthermore, the number of the bolt holes is 24, and the bolt holes are uniformly distributed on the circular ring;

furthermore, the circle center angle between each bolt hole of the bolt holes is 15 degrees, and the circle centers of all the bolt holes are on the same circle;

further, the bolt hole is matched with a lining plate bolt in size;

by adopting the scheme, the coal mill millstone liner plate pressure ring disclosed by the utility model has the following technical effects:

1. the coal mill millstone liner pressure ring has simple structure, easy operation and low cost, can widely replace a coal mill millstone pressing block and is convenient to disassemble and assemble;

2. the coal mill millstone liner pressure ring increases the contact area and the friction force between the pressure ring and the liner, the friction force provides the moment under the condition that the liner is subjected to the same tipping moment, and as the contact area is increased by two times, the stress of the bolt (also 24 bolts) is reduced, the risk of breakage of the liner bolt is reduced, thereby reducing the risk of occurrence of mill accidents;

in conclusion, the coal mill millstone liner plate pressure ring has the advantages of simple structure, simplicity and convenience in operation and low manufacturing cost, and can effectively increase the friction force between the pressure ring and the liner plate, so that the analysis of bolt fracture is reduced, and the safer production of the coal mill is guaranteed.

The conception, specific structure, and technical effects of the present invention will be further described in conjunction with the accompanying drawings and specific embodiments, so that the objects, features, and effects of the present invention can be fully understood.

Drawings

FIG. 1 is a schematic view of a millstone liner ring configuration of the coal pulverizer of the present invention;

FIG. 2 is a schematic cross-sectional view of a millstone liner ring of the coal pulverizer of the present invention;

in the figure, 1, a pressure ring; 2. bolt holes;

Detailed Description

The embodiments of the present invention will be described below with reference to the accompanying drawings for making the technical contents thereof clearer and easier to understand. The present invention may be embodied in many different forms of embodiments and the scope of the utility model is not limited to the embodiments set forth herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in figures 1 and 2, the millstone liner pressure ring of the coal machine comprises a pressure ring 1 and bolt holes 2;

the pressure ring 1 is uniformly distributed with the bolt holes 2;

in the present embodiment, it is preferred that,

the pressing ring 1 is circular, and the inclined plane of the pressing ring 1 is matched with the inclined plane of the lining plate;

the number of the bolt holes 2 is 24, the bolt holes are uniformly distributed on the compression ring 1, and the size of the bolt holes is matched with that of the lining plate bolts;

according to the operation like this at the scene, at first demolish original briquetting, install the clamping ring again, notice the installation in the time need let the clamping ring fully contact with the contact surface of welt, the inclined plane of clamping ring fully contacts with the inclined plane of welt, according to the clearance condition, can be appropriate increase the gasket in order to guarantee the fully contact of clamping ring inclined plane and welt inclined plane. The bolt is then tightened and the nut and washer are locked using electric welding. Thus, the installation is completed, and the coal mill can be normally used.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A compression ring for a grinding disc lining plate of a coal mill is characterized by comprising a compression ring (1) and bolt holes (2);

the compression ring (1) is in a circular ring shape and is flat in material; bolt holes (2) are uniformly distributed on the compression ring (1);

the side surface of the compression ring (1) is an inclined surface, and the inclination of the inclined surface is matched with the inclined surface of the lining plate;

the number of the bolt holes (2) is 24, and the bolt holes are uniformly distributed on the circular ring;

the circle center angle between each bolt hole (2) of the bolt holes (2) is 15 degrees, and the circle centers of all the bolt holes (2) are on the same circle.

2. The coal pulverizer millstone liner ring of claim 1,

the size of the bolt hole (2) is matched with that of the lining plate bolt.