CN215996920U

CN215996920U - Coal mill for thermal power plant

Info

Publication number: CN215996920U
Application number: CN202023101908.1U
Authority: CN
Inventors: 陈穗君
Original assignee: Langxin Ecological Environment Technology Co ltd
Current assignee: Langxin Ecological Environment Technology Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2022-03-11
Anticipated expiration: 2030-12-22

Abstract

The utility model provides a coal mill for a thermal power plant, which comprises a coal screening device and a coal pulverizing device, wherein the coal pulverizing device comprises: the device comprises a shell, a horizontal plate and an electric telescopic rod; the outer wall of one side of the shell is connected with the outer wall of one side of the feed inlet through a hinge; the outer wall of the shell is provided with a discharge port, the lower side of the discharge port is fixedly provided with a discharge chute matched with the discharge port, the upper side of the discharge port is fixedly provided with a fixed block, and the sealing plate penetrates through the fixed block and is used for fixing the discharge port; the fixed first mounting panel that is provided with of opposite side outer wall of feed inlet is gone up the level, and the fixed electric telescopic handle that is provided with on the first mounting panel, the bottom surface of horizontal plate passes through hinged joint son at electric telescopic handle's tip, the welding of horizontal plate is on the opposite side outer wall of shell. The two second mounting plates are horizontally fixed on the inner walls of the two sides of the shell respectively, so that the bolts pass through the through holes of the second mounting plates, the springs and the through holes of the sieve plate from bottom to top in sequence, and the sieve plate is fixed on the second mounting plates by nuts; a vibrator is fixedly arranged on the bottom surface of the sieve plate; the sieve plate is provided with a leak hole.

Description

Coal mill for thermal power plant

Technical Field

The utility model relates to the technical field of grinding machines, in particular to a coal grinding machine for a thermal power plant.

Background

The coal water slurry is a slurry fuel formed by mixing coal, water and chemical additives, is formed by mixing 65% of coal and 35% of water, has the same fluidity as oil, can be pumped, atomized and ignited for combustion, has a heat value which is half of that of the oil, can replace oil (gas) to be combusted on an industrial boiler, a power station boiler and an industrial kiln, and can also be used as gasification fuel for producing synthetic ammonia, methanol, ether, coal-to-oil, coal-to-olefin and the like.

Utility model patent application No. 201720512330.8 discloses a coal pulverizer. The coal mill comprises a grinding material shell, wherein a feeding port is arranged above the grinding material shell and used for receiving materials to be processed, and a discharging port is arranged below the grinding material shell; and the abrasive ball is rotatably arranged in the inner cavity of the abrasive shell, and the material processed by the abrasive ball is discharged from the discharge hole. The technical scheme effectively solves the problem of low transmission efficiency in the prior art.

However, in the above design, after the coal blocks are not seen to enter the grinding material shell, the coal blocks are not uniform in size, and after some coal blocks which are not broken sufficiently are ground as soon as possible, the coal blocks are large in size, so that the coal blocks cannot effectively enter the space between the grinding material shell and the grinding material balls, excessive abrasion of the grinding material balls is easily caused, and even the coal blocks are stuck, so that the power of the driving device is overloaded, and the motor is burnt.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coal mill for a thermal power plant, and aims to solve the problems in the technical background. In order to achieve the purpose, the utility model adopts the following technical scheme:

a coal mill for a thermal power plant comprises a feed inlet, a rotating shaft, a grinding ball and a feed outlet; the coal screening device is arranged at the top end of the feed port; the coal screening device comprises: the device comprises a shell, a horizontal plate, an electric telescopic rod, a first mounting plate, a sieve plate, a vibrator, a sealing plate, a fixed block, a discharge chute, a second mounting plate and a spring; the bottom opening of the shell is matched with the upper opening of the feed inlet in size and is a square opening; the outer wall of one side of the shell is connected with the outer wall of one side of the feed inlet through a hinge; the outer wall of the shell is provided with a discharge port, the lower side of the discharge port is fixedly provided with a discharge chute matched with the discharge port, the upper side of the discharge port is fixedly provided with a fixed block, and the sealing plate penetrates through the fixed block and is used for fixing the discharge port; the fixed first mounting panel that is provided with of opposite side outer wall of feed inlet is gone up the level, and the fixed electric telescopic handle that is provided with on the first mounting panel, the bottom surface of horizontal plate passes through hinged joint son at electric telescopic handle's tip, the welding of horizontal plate is on the opposite side outer wall of shell.

The two second mounting plates are horizontally fixed on the inner walls of the two sides of the shell respectively, the second mounting plates are positioned below the discharge port, through holes with the same size are formed in the same positions of the second mounting plates and the sieve plate, so that the bolts sequentially pass through the through holes of the second mounting plates, the springs and the through holes of the sieve plate from bottom to top, and the sieve plate is fixed on the second mounting plates by nuts; a vibrator is fixedly arranged on the bottom surface of the sieve plate; the sieve plate is provided with a leak hole.

Further, the electric telescopic rod further comprises an on-off key, and the on-off key is used for controlling the start and stop of the electric telescopic rod and the vibrator.

Further, a conveyor belt is arranged below the discharge chute and used for conveying the large coal.

Furthermore, the number of the leak holes is multiple, and the diameter of the leak holes is the same as the distance from the abrasive ball to the inner wall of the abrasive ball shell.

Compared with the prior art, the utility model has the following advantages;

the utility model provides a coal mill for a thermal power plant, which is provided with a coal screening device, wherein the coal screening device is arranged at the top of a feed inlet, mixed coal enters a sieve plate, a vibrator is used for screening small coal downwards, a sealing plate is opened, and large coal is supported by an electric telescopic rod and poured from a discharge port onto a conveyor belt to be conveyed away. Through the coal screening device, large coal blocks do not enter the feed inlet, excessive abrasion of the grinding balls and even blocking caused by the large coal blocks are avoided, and therefore the driving device cannot be burnt.

In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems that the present invention can solve, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic structural diagram of a coal mill for a thermal power plant according to an embodiment of the present invention;

FIG. 2 is a partial schematic view of A of FIG. 1;

fig. 3 is a partial schematic view of B in fig. 1.

Reference numerals:

1. a housing; 2. a horizontal plate; 3. an electric telescopic rod; 4. a first mounting plate; 5. a feed inlet; 6. a rotating shaft; 7. grinding balls; 8. a feeding port; 9. a sieve plate; 10. a vibrator; 11. a sealing plate; 12. a fixed block; 13. a discharge chute; 14. a second mounting plate; 15. a spring.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to fig. 3, an embodiment of the present invention provides a coal mill for a thermal power plant, including a feed port 5, a rotating shaft 6, a grinding ball 7, and a feed port 8; the coal screening device is arranged at the top end of the feed port 5; the coal screening device comprises: the device comprises a shell 1, a horizontal plate 2, an electric telescopic rod 3, a first mounting plate 4, a sieve plate 9, a vibrator 10, a sealing plate 11, a fixed block 12, a discharge chute 13, a second mounting plate 14 and a spring 15;

the shell 1, the horizontal plate 2, the first mounting plate 4, the sealing plate 11, the fixed block 12, the discharge chute 13 and the second mounting plate 14 can be made of stainless steel. The opening on the bottom surface of the shell 1 is matched with the opening on the upper end of the feed port 5 in size and is a square opening; the outer wall of one side of the shell 1 is connected with the outer wall of one side of the feed port 5 through a hinge; a discharge hole is formed in the outer wall of the shell 1, a discharge chute 13 matched with the discharge hole is welded below the discharge hole, a fixed block 12 is welded above the discharge hole, and a sealing plate 11 is movably arranged in the fixed block 12 in a penetrating mode and used for sealing the discharge hole; the horizontal welding has first mounting panel 4 on the opposite side outer wall of feed inlet 5, and bolted connection has electric telescopic handle 3 on first mounting panel 4, and the welding of horizontal plate 2 is on the opposite side outer wall of shell 1 at the tip of electric telescopic handle 3, horizontal plate 2's bottom surface through hinged joint.

The two second mounting plates 14 are respectively horizontally fixed on the inner walls of the two sides of the shell 1, the second mounting plates 14 are positioned below the discharge port, through holes with the same size are formed in the same positions of the second mounting plates 14 and the sieve plate 9, so that bolts pass through the through holes of the second mounting plates 14, the springs 15 and the through holes of the sieve plate 9 from bottom to top in sequence, and the sieve plate 9 is fixed on the second mounting plates 14 by nuts; a vibrator 10 is fixedly arranged on the bottom surface of the sieve plate 9; the sieve plate 9 is provided with a leak hole.

Specifically, the vibration exciter further comprises an on-off key, and the on-off key is used for controlling starting and stopping of the electric telescopic rod 3 and the vibrator 10.

Specifically, a conveyor belt is arranged below the discharge chute and used for conveying the large coal.

Specifically, the number of the leak holes is multiple, and the diameter of the leak hole is the same as the distance from the abrasive ball 7 to the inner wall of the shell 1 of the abrasive ball 7.

It should be noted that the feed inlet 5, the rotating shaft 6, the grinding material ball 7 and the feed opening 8 can be applied to the devices of the background patents, and the coal sieving device is arranged above the feed inlet 5 to filter out large coal blocks and enable small coal blocks to enter the feed opening 8. The electric telescopic rod 3 and the vibrator 10 are techniques which can be directly found and used by the technicians in the field. The diameter of the orifice is smaller than the diameter of the coal in the lump coal mentioned in the background art, which would cause the coal of the grinding ball 7 not to fall into the feed opening 5.

Start the device, start electromagnetic shaker 10 earlier through the on & off switch, through vibrations sieve 9, let the mixed coal pour into sieve 9 in, go into from feed inlet 5 the granule coal through electromagnetic shaker 10, then open the apron, start electric telescopic handle 3 and lead to the jack-up with the coal screening device, make the bold coal pour into the conveyer belt from blown down tank 13 and convey away. Through the coal screening device, large coal blocks do not enter the feed inlet 5, excessive abrasion of the grinding material balls 7 and even blocking caused by the large coal blocks are avoided, and therefore the driving device cannot be burnt.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mill for a thermal power plant comprises a feed inlet, a rotating shaft, a grinding ball and a feed outlet; the coal screening device is characterized by also comprising a coal screening device arranged at the top end of the feed port; the coal screening device comprises: the device comprises a shell, a horizontal plate, an electric telescopic rod, a first mounting plate, a sieve plate, a vibrator, a sealing plate, a fixed block, a discharge chute, a second mounting plate and a spring;

the bottom opening of the shell is matched with the upper end opening of the feed inlet in size and is a square opening; the outer wall of one side of the shell is connected with the outer wall of one side of the feed port through a hinge; a discharge hole is formed in the outer wall of the shell, a discharge groove matched with the discharge hole is fixedly arranged below the discharge hole, a fixed block is fixedly arranged above the discharge hole, and the sealing plate penetrates through the fixed block and is used for fixing the discharge hole; a first mounting plate is horizontally and fixedly arranged on the outer wall of the other side of the feeding hole, an electric telescopic rod is fixedly arranged on the first mounting plate, the bottom surface of the horizontal plate is connected to the end part of the electric telescopic rod through a hinge, and the horizontal plate is welded on the outer wall of the other side of the shell;

the two second mounting plates are horizontally fixed on the inner walls of the two sides of the shell respectively, the second mounting plates are positioned below the discharge port, through holes with the same size are formed in the same positions of the second mounting plates and the sieve plate, so that bolts sequentially pass through the through holes of the second mounting plates, the springs and the through holes of the sieve plate from bottom to top, and the sieve plate is fixed on the second mounting plates by nuts; a vibrator is fixedly arranged on the bottom surface of the sieve plate; and the sieve plate is provided with a leak hole.

2. The coal mill for the thermal power plant as claimed in claim 1, further comprising an on-off key for controlling the start and stop of the electric telescopic rod and the vibrator.

3. The coal mill for thermal power plants as claimed in claim 1, wherein a conveyor belt is arranged below the discharge chute and is used for conveying the large coal.

4. The coal pulverizer for thermal power plants of claim 1, wherein the number of the leakage holes is plural, and the diameter of the leakage hole is the same as the distance from the grinding ball to the inner wall of the grinding ball housing.