Automatic feeding device for raw coal bunker of power plant

Abstract

The utility model provides an automatic feeding device for a raw coal bunker of a power plant, and belongs to the technical field of feeding equipment. The automatic feeding device of the raw coal bunker of the power plant comprises a cantilever and a bucket wheel, the bucket wheel is rotationally connected with the cantilever, buckets are arranged on the bucket wheel in a circular array mode, base plates are movably arranged on the bottom walls of the buckets in a limited mode, door plates are arranged at discharging openings of the buckets, and the door plates movably abut against the base plates. In the application, a bucket wheel extends onto a raw coal pile by utilizing a cantilever arranged on an external base, a bucket rotates to shovel up coal briquettes and convey the coal briquettes out through the cantilever, when the bucket rotates to a discharging position, a door plate is opened, the coal briquettes and a base plate in the bucket fall under the action of gravity, and after the base plate is limited and stopped, the coal briquettes continue to fall due to inertia, and the coal briquettes are discharged. Coal briquettes can be separated from the bucket easily, residues are reduced, and then the feeding efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of feeding equipment, and in particular to an automatic feeding device for raw coal bunkers in power plants. Background Art

[0002] Thermal power plants use coal as fuel. The coal feeder can adjust the amount of coal needed for boiler combustion according to load requirements. A conveying and loading device is required to transport coal from the raw coal bin to the coal feeder.

[0003] In this regard, China's patent application number CN202321215247.6 discloses a coal feeder rapid feeding device. The scheme mainly arranges a bucket wheel, a belt and a baffle plate. The bucket wheel rotates, and the bucket of the outer ring takes materials alternately. The continuously rotating bucket wheel can continuously transfer coal to the belt, and then the belt transmits it to the coal feeder for use in the boiler. The feeding speed is greatly improved compared with the bucket elevator or the screw conveyor. During the feeding operation, the coal blocks loaded in the bucket at the lowest point of the bucket wheel rise upward, and the baffle plate effectively prevents part of the material in the bucket from falling back into the coal pile through the discharge port, which greatly reduces the reduction in feeding speed caused by spreading materials and improves the feeding efficiency.

[0004] However, in the process of implementing the technical solution in the embodiments of the present application, the inventor of the present application found that the above technology has at least the following technical problems:

[0005] When the bucket is rotating, coal blocks are easily blocked at the bucket's discharge port, resulting in the coal blocks not being completely discharged. The remaining coal blocks occupy the space in the bucket, thereby affecting the feeding efficiency. Utility Model Content

[0006] In order to make up for the above shortcomings, the present application provides an automatic feeding device for raw coal bunker in a power plant, aiming to improve the problems mentioned in the above background technology.

[0007] An embodiment of the present application provides an automatic loading device for a raw coal bunker in a power plant, comprising a cantilever and a bucket wheel, wherein the bucket wheel is rotatably connected to the cantilever, a circular array of buckets is arranged on the bucket wheel, a pad is provided on the bottom wall of the bucket for limited movement, a door panel is provided at the discharge port of the bucket, and the door panel is movably pressed against the pad.

[0008] In a specific embodiment, the cantilever includes a suspension and a rotating frame, the cantilever is connected to an external base, the rotating frame is fixedly connected to the outer end of the cantilever, and the bucket wheel is rotatably connected to the rotating frame.

[0009] In a specific embodiment, a guide hopper is fixedly connected to the rotating frame, and a conveyor belt is arranged on one side of the rotating frame.

[0010] In the above implementation process, the bucket wheel rotates on the rotating frame, and when the bucket moves above the guide hopper, the door panel opens under the action of gravity, dumping the coal. The coal is poured along the guide hopper onto the conveyor belt and transmitted backward along the cantilever.

[0011] In a specific embodiment, the rotating frame is movably pressed against the door panel, and the door panel is elastically hinged to the rotating frame.

[0012] In the above implementation process, the door panel is held in a closed state by the rotating frame, so that the bucket can store the coal ore. Then when the bucket is turned to the top of the guide hopper, the door panel is separated from the support of the rotating frame and opens under the action of gravity. As the bucket wheel rotates, the door panel is closed under the obstruction of the guide hopper and the rotating frame. In this embodiment, the door panel is elastically hinged and can be opened quickly with the help of gravity.

[0013] In a specific embodiment, a driving member is provided on the rotating frame to drive the bucket wheel to rotate.

[0014] In the above implementation process, the driving part includes a motor, a gear and a gear ring. The gear ring is fixed to the inner wall of the bucket wheel, the motor is installed on the wheel frame, and a gear is arranged on the output end of the motor to mesh with the gear ring to realize the driving of the bucket wheel.

[0015] In a specific embodiment, the backing plate is in the shape of a grid plate and is embedded in the bottom wall of the bucket.

[0016] In the above implementation process, the grid-shaped pad is embedded with the bottom wall of the bucket to form a whole. When the pad is movable, the pad protrudes from the bottom wall of the bucket, thereby reducing the adhesion of the bottom wall to the coal blocks, which is conducive to clean dumping.

[0017] In a specific embodiment, one end of the pad is hinged to the bucket, and the other end of the pad is fixedly connected to a C-shaped limit frame for limiting the range of movement of the pad.

[0018] In the above implementation process, after the coal block is shoveled, the bucket wheel rotates until the bucket rotates above the guide bucket. At this time, the bottom wall of the bucket faces downward, the door panel breaks away from the support of the rotating frame and quickly bounces open, and the limit frame loses the support of the door panel, causing the coal block and the pad to fall under the action of gravity until the limit plate is placed on the bucket and is limited. The coal block continues to fall under the inertia force, making it easy to separate from the bucket. The principle is similar to that when there is foreign matter attached to a container, it will knock against the table or the ground in turn.

[0019] In a specific embodiment, a skin is provided between the bottom end of the bucket and the bucket wheel, and the skin is covered on the limiting frame.

[0020] In the above implementation process, since the limit frame has a movable range, a movable cavity is opened on the bucket wheel. In order to prevent coal blocks from entering the limit frame and causing interference, an elastic skin is arranged between the bucket and the bucket wheel. Since this skin is located at the root of the rear side of the bucket, it is not affected by coal digging, and elastic steel skin can be used to improve durability.

[0021] Compared with the prior art, the beneficial effects of the present application are: the bucket wheel is extended to the raw coal pile by utilizing the cantilever arranged on the external base, the bucket rotates to scoop up the coal blocks and transport them out through the cantilever, and when the bucket rotates to the unloading position, the door panel opens, and the coal blocks and pads in the bucket fall under the action of gravity. After the pads are restricted and stopped, the coal blocks continue to fall due to inertia, which is conducive to the coal blocks to leave the bucket, reduce residues, and thus improve the feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of an automatic feeding device for raw coal bunker in a power plant provided by an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the connection relationship between the wheel frame and the bucket wheel provided in the embodiment of the present application;

[0025] Figure 3 A schematic diagram of a state in which a pad provided in an embodiment of the present application is embedded in a bottom wall of a bucket;

[0026] Figure 4 This is a schematic diagram of the state in which the pad provided in the embodiment of the present application protrudes from the bottom wall of the bucket.

[0027] In the figure: 10-cantilever; 11-suspension; 12-turntable; 13-guide hopper; 14-conveyor belt; 20-bucket wheel; 30-bucket; 40-pad; 50-door panel; 60-limiting frame; 70-skin. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0029] See also Figure 1-Figure 4The present application provides an automatic feeding device for raw coal bunker in a power plant, including a cantilever 10 and a bucket wheel 20, wherein the bucket wheel 20 is rotatably connected to the cantilever 10, and a circular array of buckets 30 is arranged on the bucket wheel 20, and a pad 40 is provided on the bottom wall of the bucket 30 in a limited manner, and a door plate 50 is provided at the discharge port of the bucket 30, and the door plate 50 is movably pressed against the pad 40. The cantilever 10 arranged on the external base is used to extend the bucket wheel 20 to the raw coal pile, and the bucket 30 rotates to scoop up the coal blocks and transport them out through the cantilever 10. When the bucket 30 rotates to the discharge position, the door plate 50 opens, and the coal blocks and the pad 40 in the bucket 30 fall under the action of gravity. After the pad 40 is restricted and stopped, the coal blocks continue to fall due to inertia, which is conducive to the coal blocks to separate from the bucket 30, reduce the residue, and thus improve the feeding efficiency.

[0030] See also Figure 1-Figure 4 The cantilever 10 includes a suspension frame 11 and a rotating frame 12. The cantilever 10 is connected to an external base, the rotating frame 12 is fixedly connected to the outer end of the cantilever 10, and the bucket wheel 20 is rotatably connected to the rotating frame 12. A guide hopper 13 is fixedly connected to the rotating frame 12, and a conveyor belt 14 is arranged on one side of the rotating frame 12. The bucket wheel 20 rotates on the rotating frame 12. When the bucket 30 moves above the guide hopper 13, the door panel 50 opens under the action of gravity, and the coal is dumped out. The coal is poured along the guide hopper 13 onto the conveyor belt 14 and is transmitted backward along the cantilever 10.

[0031] See also Figure 1-Figure 4 , the rotating frame 12 is movably pressed against the door panel 50, and the door panel 50 is elastically hinged to the rotating frame 12. The door panel 50 is pressed against by the rotating frame 12 to keep it closed, so that the bucket 30 can store the coal. Then, when the bucket 30 rotates to the top of the guide hopper 13, the door panel 50 is separated from the support of the rotating frame 12 and opens under the action of gravity. As the bucket wheel 20 rotates, the door panel 50 is closed under the obstruction of the guide hopper 13 and the rotating frame 12. In this embodiment, the door panel 50 is elastically hinged and can be quickly opened in cooperation with gravity.

[0032] See also Figure 1-Figure 4 The rotating frame 12 is provided with a driving member to drive the bucket wheel 20 to rotate. The driving member includes a motor, a gear and a gear ring. The gear ring is fixed to the inner wall of the bucket wheel 20, the motor is installed on the wheel frame, and a gear is provided on the output end of the motor to mesh with the gear ring to realize the driving of the bucket wheel 20.

[0033] See also Figure 1-Figure 4 The backing plate 40 is a grid plate-shaped plate that fits into the bottom wall of the bucket 30. The grid plate-shaped backing plate 40 is integrated with the bottom wall of the bucket 30 to form a whole. When the backing plate 40 moves, the backing plate 40 protrudes from the bottom wall of the bucket 30, thereby reducing the adhesion of the bottom wall to the coal blocks, which is conducive to dumping cleanly.

[0034] See also Figure 1-Figure 4, one end of the pad 40 is hinged to the bucket 30, and the other end of the pad 40 is fixedly connected to a C-shaped limit frame 60 for limiting the range of motion of the pad 40. After shoveling the coal, as the bucket wheel 20 rotates, until the bucket 30 rotates to the top of the guide bucket 13, at this time, the bottom wall of the bucket 30 faces downward, the door panel 50 breaks away from the support of the rotating frame 12 and quickly pops open, and the limit frame 60 loses the support of the door panel 50, so that the coal and the pad 40 fall under the action of gravity until the limit plate is placed on the bucket 30 and is limited, and the coal continues to fall under the inertia force, which is convenient for separation from the bucket 30. The principle is similar to that when there is foreign matter attached to the container, it knocks against the table or the ground in turn.

[0035] See also Figure 1-Figure 4 A cover 70 is provided between the bottom end of the bucket 30 and the bucket wheel 20, and the cover 70 covers the limit frame 60. Since the limit frame 60 has a range of motion, a movable cavity is provided on the bucket wheel 20. In order to prevent coal blocks from entering the limit frame 60 and causing interference, an elastic cover 70 is provided between the bucket 30 and the bucket wheel 20. Since the cover 70 is located at the rear root of the bucket 30, it is not affected by coal digging, and an elastic steel cover can be used to improve durability.

[0036] The working principle of the automatic feeding device of the raw coal bunker of the power plant is as follows: the driving member drives the bucket wheel 20 to rotate. When the bucket 30 shovels coal, the pad 40 is embedded in the bottom wall of the bucket 30 due to the gravity and the pressure of the coal block. At this time, the door panel 50 is pressed against and kept closed by the rotating frame 12, so that the bucket 30 can store the coal. As the bucket wheel 20 rotates, when the bucket 30 rotates to the top of the guide bucket 13, the bottom wall of the bucket 30 faces downward, the door panel 50 breaks away from the support of the rotating frame 12 and quickly pops open, and the limiting frame 60 loses the support of the door panel 50, so that the coal block and the pad 40 fall under the action of gravity until the limiting plate is placed on the bucket 30 and is limited, and the coal block and the pad 40 fall downward. The coal blocks continue to fall under the inertia force, which is convenient for separation from the bucket 30, and the coal blocks in the bucket 30 are knocked off, which effectively reduces the situation of coal blocks adhering to the bucket 30 and improves the feeding efficiency. In summary, the bucket wheel 20 is extended to the raw coal pile by using the cantilever 10 set on the external base, and the bucket 30 rotates to scoop up the coal blocks and transport them out through the cantilever 10. When the bucket 30 rotates to the unloading position, the door panel 50 opens, and the coal blocks and the pad 40 in the bucket 30 fall under the action of gravity. After the pad 40 is restricted and stopped, the coal blocks continue to fall due to inertia, which is conducive to the coal blocks to separate from the bucket 30, reduce residues, and thus improve the feeding efficiency.

[0037] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, improvement or equivalent replacement made within the spirit and principle of the present application shall be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. An automatic feeding device for raw coal bunker of a power plant, comprising a cantilever (10) and a bucket wheel (20), wherein the bucket wheel (20) is rotatably connected to the cantilever (10), and a circular array of buckets (30) is arranged on the bucket wheel (20), characterized in that: The bottom wall of the bucket (30) is provided with a cushion plate (40) in a limited manner, and the discharge port of the bucket (30) is provided with a door plate (50), and the door plate (50) is movably pressed against the cushion plate (40).

2. The automatic feeding device for raw coal bunker in a power plant according to claim 1 is characterized in that: The cantilever (10) comprises a suspension frame (11) and a rotating frame (12); the cantilever (10) is connected to an external base; the rotating frame (12) is fixedly connected to the outer end of the cantilever (10); and the bucket wheel (20) is rotatably connected to the rotating frame (12).

3. The automatic feeding device for raw coal bunker in a power plant according to claim 2 is characterized in that: A guide hopper (13) is fixedly connected to the rotating frame (12), and a conveyor belt (14) is arranged on one side of the rotating frame (12).

4. The automatic feeding device for raw coal bunker in a power plant according to claim 3 is characterized in that: The rotating frame (12) is movably pressed against the door panel (50), and the door panel (50) is elastically hinged to the rotating frame (12).

5. The automatic feeding device for raw coal bunker in a power plant according to claim 4 is characterized in that: The rotating frame (12) is provided with a driving member for driving the bucket wheel (20) to rotate.

6. The automatic feeding device for raw coal bunker in a power plant according to claim 5, characterized in that: The pad (40) is in the shape of a grid plate and is engaged with the bottom wall of the bucket (30).

7. The automatic feeding device for raw coal bunker in a power plant according to claim 6, characterized in that: One end of the pad (40) is hinged to the bucket (30), and the other end of the pad (40) is fixedly connected to a C-shaped limiting frame (60) for limiting the range of motion of the pad (40).

8. The automatic feeding device for raw coal bunker in a power plant according to claim 7, characterized in that: A cover (70) is provided between the bottom end of the bucket (30) and the bucket wheel (20), and the cover (70) covers the limiting frame (60).

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