CN214455206U

CN214455206U - Coal feeder

Info

Publication number: CN214455206U
Application number: CN202120135389.6U
Authority: CN
Inventors: 张志民; 康立强; 刘成水; 吕素钊; 杨翔宇; 孙玉涛; 范祚恒; 刘锦辉
Original assignee: Guoneng Xingyang Thermal Power Co ltd
Current assignee: Guoneng Xingyang Thermal Power Co ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-10-22
Anticipated expiration: 2031-01-18

Abstract

The utility model discloses a coal feeder. The coal feeder comprises a shell, wherein a feed port and a discharge port are formed in the shell, a coal feeding conveyer belt is arranged in the shell, the coal feeding conveyer belt is positioned between the feed port and the discharge port, two ends of the coal feeding conveyer belt at least extend to the feed port and the discharge port, a cleaning conveyer belt is also arranged in the shell, the cleaning conveyer belt is positioned below the coal feeding conveyer belt, the cleaning conveyer belt is positioned between the feed port and the discharge port, two ends of the cleaning conveyer belt at least extend to the feed port and the discharge port, and the cleaning conveyer belt is close to the bottom in the shell; the sweeping conveyer belt is provided with bulges, shoveling knives or scraping plates which are continuously arranged along the conveying direction. The utility model discloses during the feeder operation, can carry out effectual clearance to bottom coal breakage, guarantee the condition that the chute blockage can not appear in the feeder, improve the stability of powder process system greatly.

Description

Coal feeder

Technical Field

The utility model relates to a coal feeder, concretely relates to seals coal feeder with prevent stifled coal structure.

Background

The common coal feeder structure mainly comprises a shell, a conveying belt and a motor. Furthermore, the shell of the coal feeder is connected with the bottom of the raw coal bunker, raw coal in the raw coal bunker falls onto a coal feeding belt of the coal feeder, and a motor of the coal feeder rotates to drive the belt to operate so as to convey the raw coal into the coal mill. In the conveying process, raw coal can scatter below the belt in the process of falling to the coal feeding belt, is accumulated at the bottom of the shell of the coal feeding machine, and is excessively accumulated to cause blockage of the coal feeding machine and unsmooth operation of the coal feeding belt, so that the output of the coal grinding machine is reduced, pulverized coal is reduced, the boiler is unstable in combustion, and a series of influences such as unit safety are influenced.

Disclosure of Invention

To the not enough of prior art existence, the utility model provides a coal feeder.

Therefore, the utility model provides a coal feeder includes the casing, is equipped with feed inlet and discharge gate on this casing, and is equipped with the coal feeding conveyer belt in the casing, and the coal feeding conveyer belt lies in between feed inlet and the discharge gate and both ends extend to feed inlet and discharge gate department at least simultaneously, still is equipped with in the casing and cleans the conveyer belt, clean the conveyer belt and lie in the below of coal feeding conveyer belt, and clean the conveyer belt and lie in between feed inlet and the discharge gate and both ends extend to feed inlet and discharge gate department at least, clean the conveyer belt and be close to the bottom in the casing simultaneously; the sweeping conveyer belt is provided with bulges, shoveling knives or scraping plates which are continuously arranged along the conveying direction.

Alternatively, the projections, blades or scrapers arranged in series in the conveying direction may have different heights.

Further, the protrusion is a wedge-shaped protrusion.

Further, the bottom surface in the shell is arc-shaped or plane, and the cleaning conveyer belt is close to and covers the bottom surface in the shell.

Furthermore, one end of the coal feeding conveyer belt is positioned below the feed port, and the other end of the coal feeding conveyer belt is positioned above the discharge port; the cleaning conveyer belt is positioned below the coal feeding belt and above the discharge hole.

Furthermore, the coal feeding conveyer belt is tensioned and fixed in the shell through a first driving shaft and a first driven shaft, and the cleaning conveyer belt is tensioned and fixed in the shell through a second driving shaft and a second driven shaft.

Further, a coal feeding conveyer belt driving motor and a cleaning conveyer belt driving motor are installed in the shell.

Furthermore, an ultrasonic level meter is arranged in the shell and positioned at one end part of the cleaning conveying belt.

And the PLC is used for acquiring signals of the ultrasonic level meter and controlling the work of cleaning the conveying belt.

Further, the feed inlet department of casing is provided with the raw coal storehouse, and is provided with pneumatic picture peg between raw coal storehouse and the feed inlet, discharge gate department is equipped with the coal breakage pipe.

Compared with the prior art, the utility model, following technological effect has:

the utility model discloses during the feeder operation, can carry out effectual clearance to bottom coal breakage, guarantee the condition that the chute blockage can not appear in the feeder, improve the stability of powder process system greatly. Furthermore, a corresponding sensor is arranged in the coal feeder, so that automatic identification and automatic control of cleaning of the fallen coal can be realized.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic cross-sectional view of the middle part of the present invention.

The following detailed description of the present invention will be made with reference to the accompanying drawings.

Detailed Description

Unless otherwise specified, the terminology herein is to be understood in light of the knowledge of one of ordinary skill in the relevant art.

The terms of direction or orientation such as up, down, inner, end, horizontal, etc. are consistent with the corresponding directions or orientations in the drawings, and it should be noted that these directions or orientations are used to explain the spatial relative position relationship of each component or feature of the present invention, and do not have the only limiting effect on the spatial relative position relationship of the related component or feature, and the spatial or/and direction/orientation replacement made by those skilled in the art on the basis of the technical concept of the present invention is within the protection scope of the present invention.

The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.

Example (b):

a concrete implementation scheme of a coal feeder is shown in figure 1 and comprises a horizontally arranged shell 1, the cross section of the shell of the embodiment is circular, one end of the shell is provided with a feeding hole, the other end of the shell is provided with a discharging hole, and the feeding hole and the discharging hole are respectively upward and downward;

the width of the coal feeding conveyer belt 5 in the embodiment is about 80cm, and the coal feeding conveyer belt is tightly fixed in the shell 1 through the driving wheel 3 and the driven wheel 4, is positioned between the feeding hole and the discharging hole, and is positioned below the feeding hole and above the discharging hole; the driving motor 2 is arranged in the shell 1 and close to the driving wheel 3 for driving the driving wheel 3;

the width of the cleaning conveyer belt 9 is about 15cm, a wedge-shaped bulge is arranged on the cleaning conveyer belt 9 along the conveying direction or the rotating direction, the cleaning conveyer belt 9 is tightly fixed in the fixed shell 1 through a driving bearing 7 and a driven bearing 8, is positioned below the coal feeding conveyer belt 5 and close to the bottom in the shell, and is positioned above the discharge hole; a sweeping motor 6 is mounted within the housing for driving a drive bearing 7.

When in work: raw coal falls onto a coal feeding conveyer belt 5 through a feeding hole, and a driving motor 2 rotates to drive a driving wheel 3 to drive the coal feeding conveyer belt 5 to operate so as to convey the raw coal to a discharging hole to supply the raw coal for the next link; if coal blockage occurs, or the cleaning motor can be started in a fixed time period to drive the cleaning conveying belt 9 to rotate, and the wedge-shaped protrusions arranged on the cleaning conveying belt can shovel loose raw coal piled at the bottom and scrape the raw coal to the discharge hole. In some schemes, the cleaning conveyer belt can be provided with scrapers or scraper knives which are arranged in sequence or in series along the conveying direction, and the scrapers or the scraper knives can also be used for conveying the piled coal at the bottom in the shell and scraping the piled coal to the discharge hole. In a further scheme, the distance between the continuously arranged bulges, scrapers or scrapers and the bottom of the shell, namely the height of the continuously arranged bulges, scrapers or scrapers, is different from the bottom of the shell, so that piled coal with different heights can be scraped.

In a further scheme, in order to realize automatic control, the ultrasonic level meter 10 is installed in the shell and is specifically installed at one end in the shell 1, the specific installation height is determined according to the coal falling height which can occur in the shell, and the distance between the ultrasonic level meter 10 in the embodiment and the bottom in the shell is about 5 cm; the ultrasonic level gauge may be a commercially available related device, such as the ultrasonic level gauge model FPPR600 in this embodiment. In the process, the ultrasonic level meter 10 calculates a value by the time length of ultrasonic wave transmission and reception and the speed of the ultrasonic wave, and the value controls the cleaning motor 6 to start and stop after being processed and judged by a controller, such as a PLC logic controller.

When no scattered coal is accumulated normally, the ultrasonic level meter 10 horizontally transmits ultrasonic waves, the ultrasonic level meter receives the ultrasonic waves after the ultrasonic waves are reflected by the inner wall of the shell 1, the transmitting and receiving time of the ultrasonic waves is a fixed value, the fixed value is calculated by the ultrasonic level meter and then is transmitted to a controller, such as a PLC (programmable logic controller) logic controller, to be processed and judged to send a 'not' signal, and the cleaning motor 6 is kept in a stop state;

when the scattered coal accumulation exceeds the installation height of the ultrasonic level meter in the shell, which is 5cm in the embodiment, the ultrasonic transmitting and receiving time values are changed, the controller processes and judges to send a 'yes' signal, the cleaning motor 6 is started, and the cleaning conveying belt 9 starts to work; when the scattered coal is cleaned, the ultrasonic transmitting and receiving time is recovered to a fixed value, the controller processes and judges to send a 'not' signal, the cleaning motor 6 stops, and the cleaning conveyer belt 9 stops working.

In a further aspect, the ultrasonic level gauge and the PLC logic controller may be integrated into a single box mounted at one end of the housing.

In a further scheme, a raw coal bin is connected to the feeding port, a coal dropping pipe is connected to the discharging port, a pneumatic inserting plate door is installed at the joint of the shell 1 and the raw coal bin, and whether raw coal in the raw coal bin drops or not is controlled through the pneumatic inserting plate door.

In other schemes, the bottom of the shell is a plane, for example, the cross section of the shell is a square such as a rectangle, in the structure, the width of the cleaning conveyer belt is the same as that of the bottom in the shell.

Claims

1. A coal feeder comprises a shell, wherein a feed port and a discharge port are formed in the shell, a coal feeding conveyer belt is arranged in the shell, the coal feeding conveyer belt is positioned between the feed port and the discharge port, two ends of the coal feeding conveyer belt at least extend to the feed port and the discharge port, the coal feeder is characterized in that a cleaning conveyer belt is further arranged in the shell, the cleaning conveyer belt is positioned below the coal feeding conveyer belt, the cleaning conveyer belt is positioned between the feed port and the discharge port, two ends of the cleaning conveyer belt at least extend to the feed port and the discharge port, and the cleaning conveyer belt is close to the bottom in the shell; the cleaning conveyer belt is provided with a bulge, a scraper or a scraper blade which are continuously arranged along the conveying direction, the feed inlet of the shell is provided with a raw coal bin, a pneumatic inserting plate is arranged between the raw coal bin and the feed inlet, and the discharge outlet is provided with a coal dropping pipe.

2. The coal feeder of claim 1, wherein the projections, blades or flights arranged in series in the conveying direction vary in height.

3. The coal feeder of claim 1 or 2, wherein the projection is a wedge-shaped projection.

4. The coal feeder of claim 1, wherein the inner bottom surface of the housing is curved or planar, and the sweeping belt is adjacent to and covers the inner bottom surface of the housing.

5. The coal feeder of claim 1, wherein the coal feed conveyor belt is positioned below the feed inlet at one end and above the discharge outlet at the other end; the cleaning conveyer belt is positioned below the coal feeding belt and above the discharge hole.

6. The coal feeder of claim 1, wherein the coal feed conveyor belt is secured in the housing by tensioning through a first drive shaft and a first driven shaft, and the clean conveyor belt is secured in the housing by tensioning through a second drive shaft and a second driven shaft.

7. The coal feeder of claim 1, wherein a coal feed belt drive motor and a sweeping belt drive motor are mounted within the housing.

8. The coal feeder of claim 1, wherein an ultrasonic level gauge is mounted in the housing at an end of the sweeping belt.

9. The coal feeder of claim 1, further comprising a PLC logic controller for collecting signals from the ultrasonic level meter to control operation of the conveyor belt cleaning.