CN215464964U

CN215464964U - Wear-proof device for reamer of coal mill

Info

Publication number: CN215464964U
Application number: CN202121366613.9U
Authority: CN
Inventors: 王红卫; 张海金; 钱宇; 崔炎召; 程似金; 黄占召
Original assignee: Henan Zhongfu Electric Power Co ltd
Current assignee: Henan Zhongfu Electric Power Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-01-11
Anticipated expiration: 2031-06-21

Abstract

The utility model discloses an anti-abrasion device for a reamer of a coal mill, which comprises four reamers, wherein the four reamers uniformly surround the outside of a central cylinder, and the reamers and a lining plate of the central cylinder form an included angle of 30 degrees; one end of the reamer is fixedly connected with the lining plate of the central cylinder, and the reamer is connected with the central cylinder through a chain; four rows of limiting assemblies are uniformly arranged on the outer wall of the central cylinder, and each row of limiting assemblies consists of six rows of angle irons; an anti-abrasion sheet is arranged on the bearing surface of the reamer. According to the reamer, the anti-abrasion piece is arranged on the stress surface of the reamer, so that the reamer is stressed first, and the phenomenon that the reamer is abraded is further protected; meanwhile, when the coal mill is overhauled, only the abraded abrasion-proof piece needs to be replaced or repaired, the working strength of constructors is reduced, the cost is reduced, and the coal mill is convenient to use, simple to operate and easy to popularize.

Description

Wear-proof device for reamer of coal mill

The technical field is as follows:

the utility model relates to an anti-abrasion device, in particular to an anti-abrasion device for a reamer of a coal mill.

Background art:

the reamer blade mainly has the advantages that coal coming from a coal dropping pipe is screwed into the cylinder body of the coal grinding machine through the reamer blade, a coal-fired power plant needs to burn a large amount of power coal every year, and the power coal is doped with stones and coal gangue in the process of mining and digging tailings and corner ores, and even wood for supporting a roadway, water-plugging woven bags and other sundries; the stones and the coal gangue can reduce the calorific value of coal, reduce the output of a coal mill and increase the service power; wood, woven bags and the like can block the powder pipe and the coal feeder; especially, the recent coal burning market is short, the coal quality is greatly reduced, the hard impurities in the coal quality are increased, and particularly, stones, coal gangue and the like are contained; therefore, the abrasion of the coal pulverizing system is in an aggravating trend, particularly the abrasion of the auger reamer of the coal mill seriously affects the efficiency of the coal mill and the safe operation of the coal pulverizing system, and the auger reamer of the coal mill completely falls off.

The utility model has the following contents:

the technical problem to be solved by the utility model is as follows: overcome prior art's not enough, provide a coal pulverizer reamer abrasionproof decreases device, can prevent the emergence of the reamer wearing and tearing condition to guarantee the safe operation of powder process system.

The technical scheme adopted by the utility model for solving the technical problem is as follows:

the wear-resisting device for the reamer of the coal mill comprises four reamers which uniformly surround the outside of a central cylinder; one end of the reamer is fixedly connected with the lining plate of the central cylinder, and the reamer is connected with the central cylinder through a chain; four rows of limiting assemblies are uniformly arranged on the outer wall of the central cylinder, and each row of limiting assemblies respectively consists of six rows of angle irons; and an anti-abrasion sheet is arranged on the stress surface of the reamer.

At least ten anti-abrasion plates are uniformly arranged on the stress surface of each reamer, and the anti-abrasion plates rise along the reamer direction and form an included angle of 15 degrees with the reamer; the projection length of the anti-wear sheet on the reamer is larger than the distance between the two adjacent anti-wear sheets. The right end of the reamer and the central cylinder lining plate form an included angle of 30 degrees; the right end of the reamer is fixedly connected with the base through a bolt, and the base is fixedly connected with the left end face of the central cylinder lining plate.

The number of the fixing rings is 24, the fixing rings are arranged on the reamer on the left side of each angle iron respectively, the fixing rings are connected with one end of the chain, and the other end of the chain is fixedly connected with the central cylinder through the positioning plate.

The end part of the angle iron extends out of the outer end of the reamer.

The utility model has the following positive beneficial effects:

1. according to the utility model, the anti-abrasion sheet is arranged on the bearing surface of the reamer, so that after raw coal enters the stranding cage through the coal dropping pipe, the anti-abrasion sheet is stressed preferentially to push most of coal to move forwards, and the omitted part is conveyed away by the reamer, so that the conveying efficiency is improved, the anti-reamer is protected, and the service cycle of the reamer is prolonged.

2. The angle between the anti-wear sheet and the reamer is 15 degrees, so that the angle of the reamer is increased, the stress area of the reamer is increased, the unit area stress is reduced, the wear rate of the reamer is reduced, and the coal conveying efficiency is improved.

3. When the coal mill is overhauled, only the worn wear-resistant sheet needs to be replaced or repaired, and the reamer does not need to be replaced, so that the labor intensity of workers is reduced, the construction cost is reduced, and the coal mill is convenient to use, simple to operate and easy to popularize.

Description of the drawings:

FIG. 1 is a schematic structural diagram of the present invention.

The specific implementation mode is as follows:

the utility model will be further explained and explained with reference to the drawings, in which:

example (b): referring to fig. 1, the coal mill reamer anti-wear device comprises four reamers 2, wherein the four reamers 1 uniformly surround the outside of a central cylinder 1; one end of the reamer 2 is fixedly connected with a central cylinder lining plate 8, and the reamer 2 is connected with the central cylinder through a chain 7; four rows of limiting assemblies are uniformly arranged on the outer wall of the central cylinder 1, and each row of limiting assemblies consists of six rows of angle irons 4; the bearing surface of the reamer 2 is provided with an anti-wear sheet 9.

The anti-abrasion piece 9 rises along the reamer direction, and an included angle between the anti-abrasion piece and the reamer 2 is 15 degrees; at least ten wear-proof sheets 9 are uniformly arranged on the bearing surface of each reamer 2.

The right end of the reamer 2 and the central cylinder lining plate 8 form an included angle of 30 degrees; the right end of the reamer 2 is fixedly connected with the base 3 through a bolt, and the base 3 is fixedly connected with the left end face of the central cylinder lining plate 8.

The number of the fixing rings 5 is 24, the fixing rings 5 are respectively arranged on the reamer 2 on the left side of each angle iron 4, the fixing rings 5 are connected with one end of a chain 7, and the other end of the chain 7 is fixedly connected with the center barrel 1 through a positioning plate 6.

The ends of the angle irons 4 extend beyond the outer end of the reamer 2.

In actual operation, the wear plate on each reamer is generally 40, and the size of the wear plate is: width: 9cm, length: 27cm, thickness: 2 cm; the width of the wear-proof sheet is consistent with or slightly wider than that of the reamer, and the length of the wear-proof sheet is longer according to the field situation.

In the above description: the chain is a limiting device of the reamer, and the chain not only ensures that the reamer has a certain moving range, but also ensures that the reamer cannot rub against the central cylinder and the shell.

In the above description, the angle iron and the fixing ring are used correspondingly; in use, in order to avoid direct friction between the reamer and the outer wall and the inner wall of the stranding cage, the reamer is limited by a fixing ring; the left side of the central cylinder extends into the central cylinder of the coal mill, and the right side of the central cylinder is connected with an external rotating mechanism and rotates in the stranding cage under the driving of the external rotating mechanism; the coal dust falls between the reamer on the left side of the base and the central cylinder, and is pushed to the inner side of the coal mill through the rotation of the reamer.

In the above description, the upper part of the limiting block is longer than the outer side of the reamer, and the limiting block is used for adjusting the gap, so that the reamer can not wipe the outer wall of the dragon, nor can the reamer wipe the inner wall of the dragon; once abnormal sound is found in the running process, whether the central cylinder, the reamer and the fixing ring have problems or not can be judged; in operation, the conditions of reamer abrasion, fixed ring wear, limit block short grinding and the like are often found.

During the use, through setting up the abrasionproof piece on the stress surface at every reamer, and the abrasionproof piece is 15 contained angles along reamer direction and reamer, the reamer after the improvement is under the condition that does not increase original bearing capacity, the lifting surface area has been increased, the unit area atress reduces, reduce the degree of wear, simultaneously because the abrasionproof piece is in the reamer outside, preferential atress, further play the phenomenon that the protection reamer is worn and torn, in addition, the coal pulverizer is when overhauing, only need change or repair by the abrasionproof piece that is worn and torn, the reamer need not be changed, the work load is little, the cost is low, and easy operation.

According to the reamer, the anti-abrasion piece is arranged on the stress surface of the reamer, and the included angle between the anti-abrasion piece and the reamer is 15 degrees, so that the reamer is stressed first, and the phenomenon that the reamer is abraded is further prevented; meanwhile, when the coal mill is overhauled, only the abraded abrasion-proof piece needs to be replaced or repaired, the working strength of constructors is reduced, the cost is reduced, and the coal mill is convenient to use, simple to operate and easy to popularize.

Claims

1. The utility model provides a coal pulverizer reamer abrasionproof decreases device, includes reamer (2), its characterized in that: the number of the reamers (2) is four, and the reamers are uniformly surrounded on the outer part of the central cylinder (1); one end of the reamer (2) is fixedly connected with a central cylinder lining plate (8), and the reamer (2) is connected with the central cylinder through a chain (7); the outer wall of the central cylinder (1) is uniformly provided with four rows of limiting assemblies, each row of limiting assemblies respectively comprises six rows of angle irons (4), and the stress surface of the reamer (2) is provided with an anti-abrasion sheet (9).

2. The coal mill reamer wear prevention device of claim 1, wherein: at least ten anti-abrasion sheets (9) are uniformly arranged on the stress surface of each reamer (2), and the anti-abrasion sheets (9) rise along the reamer direction and are distributed at an included angle of 15 degrees with the reamer (2); the projection length of the anti-wear sheet (9) on the reamer (2) is larger than the distance between the two adjacent anti-wear sheets (9).

3. The coal mill reamer wear prevention device of claim 1, wherein: the right end of the reamer (2) and the central cylinder lining plate (8) form an included angle of 30 degrees; the right end of the reamer (2) is fixedly connected with the base (3) through a bolt, and the base (3) is fixedly connected with the left end face of the central cylinder lining plate (8).

4. The coal mill reamer wear prevention device of claim 1, wherein: the number of the fixing rings (5) is 24, the fixing rings (5) are respectively arranged on the reamer (2) on the left side of each angle iron (4), the fixing rings (5) are connected with one end of the chain (7), and the other end of the chain (7) is fixedly connected with the central cylinder (1) through the positioning plate (6).

5. The coal mill reamer wear prevention device of claim 1, wherein: the end part of the angle iron (4) extends out of the outer end of the reamer (2).