Blockage removing device for coal dropping pipe of coal feeder of thermal power plant

Abstract

The utility model discloses a blockage removing device for a coal drop pipe of a coal feeder of a thermal power plant, which belongs to the technical field of coal drop pipes and comprises a coal drop pipe main body, an auger outer conveying pipe fixedly connected to the outer circumferential surface of the coal drop pipe main body, and a coal discharge pipe fixedly connected to the outer circumferential surface of the auger outer conveying pipe. The lower end of the coal discharging pipe is fixedly connected with a valve, the lower end of the valve is fixedly connected with a coal feeder side system coal falling pipe, the lower end of the coal feeder side system coal falling pipe is fixedly connected with a coal feeder main body, the upper end of the coal feeder main body is fixedly connected with a main feeding pipe, and the main feeding pipe is connected with a coal falling pipe main body; according to the coal drop pipe, blockage removal treatment can be automatically conducted on coal blocked in the coal drop pipe body, the labor burden of maintenance personnel is greatly reduced, the working efficiency is improved, blockage removal can be conducted in time, power generation is prevented from being affected, and then blockage removal equipment is stopped after the coal drop amount is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of coal dropping pipes, and more specifically to a device for removing blockage from a coal dropping pipe of a coal feeder in a thermal power plant. Background Art

[0002] A thermal power plant, also known as a thermal power plant, is a factory that uses coal as fuel to produce electricity. Its basic production process is: when the fuel burns, it heats water to generate steam, converting the chemical energy of the fuel into thermal energy. The steam pressure drives the turbine to rotate, converting the thermal energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy.

[0003] The traditional coal drop pipe from the raw coal bin to the coal feeder has an inverted cone-shaped structure as a whole. Since the shrinkage rate of the cross-section of the inverted cone-shaped coal bin becomes smaller as it goes downward, the coal flow resistance increases. If the coal becomes moist due to external factors, it will lead to untimely circulation at the lower end of the coal drop pipe. Once the circulation is untimely, the coal will squeeze the wall of the coal drop pipe due to pressure, and coal blockage will easily occur. As a result, coal blockage in the coal transportation system from the raw coal bin to the coal feeder drop pipe of a thermal power plant is a common problem for maintenance personnel. Relying solely on maintenance personnel to clear the coal blockage not only results in a large workload, but also low work efficiency. If the blockage is not cleared in time, the coal supply will decrease, so that the boiler load will be reduced, affecting power generation. Therefore, the utility model provides a device for clearing blockage in the coal drop pipe of a coal feeder in a thermal power plant. Utility Model Content

[0004] To solve the above problems, the utility model adopts the following technical solutions.

[0005] A device for clearing the blockage of a coal drop pipe of a coal feeder in a thermal power plant, comprising a coal drop pipe body, an outer circumferential surface of the coal drop pipe body is fixedly connected to an auger outer conveying pipe, an outer circumferential surface of the auger outer conveying pipe is fixedly connected to a coal discharge pipe, a valve is fixedly connected to the lower end of the coal discharge pipe, a coal feeder side system coal drop pipe is fixedly connected to the lower end of the valve, a coal feeder body is fixedly connected to the lower end of the coal feeder side system coal drop pipe, and the coal feeder body is connected to the coal drop pipe body;

[0006] A connecting piece is fixedly connected to the outer circumference of one end of the auger outer conveying pipe, one end of the connecting piece is fixedly connected to a moving platform, a servo motor is fixedly connected to the power input end of the moving platform, a fixed frame is fixedly connected to one side of the fixed frame, a coupling 2 is fixedly connected to the output end of the motor, one end of the coupling 2 is fixedly connected to a spiral auger, and one end of the spiral auger passes through the auger outer conveying pipe and extends into the main body of the coal drop pipe.

[0007] Furthermore, the mobile platform includes a mounting plate, a guide rail, a threaded screw and a slider, a pair of guide rails are fixedly connected to the surface of the mounting plate, a slider is slidably connected to the guide rail, a threaded screw penetrates and is threadedly connected to the center of the slider, the servo motor is fixedly connected to one end of the mounting plate, a coupling 1 is fixedly connected to the output end of the servo motor, one end of the coupling 1 is connected to the threaded screw, and the fixed frame is fixedly connected to one side of the slider.

[0008] Furthermore, one end of the auger outer delivery pipe is fixedly connected to a cover body, and one end of the cover body is fixedly connected to an air valve.

[0009] Furthermore, a reinforcement rod is fixedly connected to the outer circumferential surface of the coal drop pipe body, and one end of the reinforcement rod is fixed to the outer circumferential surface of the auger outer conveying pipe.

[0010] Furthermore, a pair of bearings are fixedly connected to the fixing frame, and inner walls of the pair of bearings are fixed to the outer circumferential surface of the spiral auger.

[0011] Furthermore, the outer delivery pipe of the auger includes a delivery pipe I and a delivery pipe II, and the delivery pipe I and the delivery pipe II are flange-connected.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] This solution solves the problem of coal blockage in the coal transportation system from the raw coal bin to the coal drop pipe of the coal feeder in the thermal power plant in the prior art. It can automatically clear the coal blocked in the main body of the coal drop pipe, greatly reducing the labor burden of maintenance personnel and improving work efficiency. It can clear the blockage in time to avoid affecting power generation, and then exit the operation of the clearing equipment according to the increase in the amount of coal dropped. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model blockage removal device;

[0016] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0017] Figure 4 It is a schematic structural diagram of a hood body cross-section of the utility model.

[0018] Description of the numbers in the figure:

[0019] 1. Coal drop pipe body; 11. Reinforcement rod; 2. Auger outer conveying pipe; 21. Cover body; 22. Air valve; 23. Conveying pipe I; 24. Conveying pipe II; 3. Coal discharge pipe; 31. Valve; 32. Coal drop pipe beside coal feeder; 33. Coal feeder body; 4. Connectors; 5. Mobile platform; 51. Mounting plate; 52. Guide rail; 53. Threaded screw; 54. Slider; 6. Servo motor; 61. Coupling 1; 7. Fixed bracket; 71. Bearing; 8. Motor; 81. Coupling 2; 9. Auger. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] like Figure 1-4 As shown, a device for unblocking a coal drop pipe of a coal feeder in a thermal power plant comprises a coal drop pipe body 1, an outer circumferential surface of the coal drop pipe body 1 is fixedly connected to an auger outer conveying pipe 2, an outer circumferential surface of the auger outer conveying pipe 2 is fixedly connected to a coal discharge pipe 3, a lower end of the coal discharge pipe 3 is fixedly connected to a valve 31, a lower end of the valve 31 is fixedly connected to a coal feeder side system coal drop pipe 32, a lower end of the coal feeder side system coal drop pipe 32 is fixedly connected to a coal feeder body 33, and the coal feeder body 33 is connected to the coal drop pipe body 1.

[0022] A connecting piece 4 is fixedly connected to the outer circumference of one end of the auger outer conveying pipe 2, one end of the connecting piece 4 is fixedly connected to a mobile platform 5, a servo motor 6 is fixedly connected to the power input end of the mobile platform 5, a fixed frame 7 is fixedly connected to a motor 8 on one side of the fixed frame 7, a coupling 2 81 is fixedly connected to the output end of the motor 8, one end of the coupling 2 81 is fixedly connected to a spiral auger 9, one end of the spiral auger 9 passes through the auger outer conveying pipe 2 and extends into the coal drop pipe body 1.

[0023] During use, when the coal dropping pipe body 1 drops coal normally, the spiral auger 9 is stored in the outer conveying pipe 2 of the auger, and does not interfere with the coal dropping pipe body 1 to avoid affecting the normal coal dropping of the coal dropping pipe body 1. When the lower end of the coal dropping pipe body 1 is blocked, the servo motor 6 and the motor 8 are started at the same time. The servo motor 6 cooperates with the moving platform 5 to drive the motor 8 to move to one side of the coal dropping pipe body 1. At the same time, the motor 8 drives the spiral auger 9 to rotate into the coal in the coal dropping pipe body 1, and then the servo motor 6 is turned off, and the motor 8 continues to run. The rotating spiral auger 9 can transport the blocked coal in the coal dropping pipe body 1 to the outer conveying pipe 2 of the auger, and finally discharge it from the coal discharge pipe 3, and can automatically remove the blocked coal in the coal dropping pipe body 1, which greatly reduces the labor burden of maintenance personnel, improves work efficiency, and can remove the blockage in time to avoid affecting power generation. Then, according to the increase in the amount of coal dropped, the blockage removal equipment is exited from operation;

[0024] The coal dropped from the coal drop pipe body 1 and the coal discharge pipe 3 will fall into the coal feeder body 33 and finally enter the ball mill. When the boiler is shut down and the remaining coal in the coal bunker needs to be used up, the valve 31 is closed to prevent the coal powder from leaking out through the bypass. The valve 31 is usually in the open state.

[0025] The coal feeder body 33 is only for a better understanding of the path through which the coal enters the coal feeder body 33 from the coal drop pipe body 1 and the coal discharge pipe 3. The coal feeder body 33 belongs to the existing known technology, and its internal structure and working principle will not be described in detail.

[0026] like Figure 1-2 As shown, the mobile platform 5 includes a mounting plate 51, a guide rail 52, a threaded screw 53 and a slider 54. A pair of guide rails 52 are fixedly connected to the surface of the mounting plate 51, and a slider 54 is slidably connected to the guide rail 52. The center of the slider 54 is penetrated by and threadedly connected with the threaded screw 53. The servo motor 6 is fixedly connected to one end of the mounting plate 51, and the output end of the servo motor 6 is fixedly connected to a coupling 61, one end of the coupling 61 is connected to the threaded screw 53, and the fixing frame 7 is fixedly connected to one side of the slider 54.

[0027] When in use, after starting the servo motor 6, the servo motor 6 can drive the threaded screw 53 on the mobile platform 5 to rotate, and the rotating threaded screw 53 can drive the slider 54 to move. The moving slider 54 cooperates with the fixed frame 7 to drive the motor 8 to approach or move away from the coal drop pipe body 1.

[0028] like Figure 2-4 As shown, one end of the auger outer delivery pipe 2 is fixedly connected to a cover body 21 , and one end of the cover body 21 is fixedly connected to an air valve 22 .

[0029] When in use, the air valve 22 can be connected to an air compressor, thereby forming an airtight seal at the cover body 21 to prevent carbon powder and dust from passing through one end of the auger outer delivery pipe 2 to the outside and causing pollution.

[0030] like Figure 1 As shown, a reinforcing rod 11 is fixedly connected to the outer circumference of the coal drop pipe body 1 , and one end of the reinforcing rod 11 is fixed to the outer circumference of the auger outer conveying pipe 2 .

[0031] When in use, the reinforcement rod 11 is used to improve the stability of the installation of the blockage removal device.

[0032] like Figure 2 As shown, a pair of bearings 71 are fixedly connected to the fixing frame 7 , and the inner walls of the pair of bearings 71 are fixed to the outer circumferential surface of the spiral auger 9 .

[0033] When in use, the outer circumferential surface of the spiral auger 9 is connected to the fixing frame 7 through a pair of bearings 71, so that the spiral auger 9 can maintain normal rotation, thereby ensuring the stability of the spiral auger 9 during the rotation process.

[0034] like Figure 1 As shown, the auger outer delivery pipe 2 includes a delivery pipe I 23 and a delivery pipe II 24, and the delivery pipe I 23 and the delivery pipe II 24 are flange-connected.

[0035] In summary, the specific working process of this program is as follows:

[0036] When the coal dropping pipe body 1 drops coal normally, the spiral auger 9 is stored in the outer conveying pipe 2 of the auger and does not interfere with the coal dropping pipe body 1 to avoid affecting the normal coal dropping of the coal dropping pipe body 1. When the lower end of the coal dropping pipe body 1 is blocked, the servo motor 6 and the motor 8 are started at the same time. The servo motor 6 cooperates with the moving platform 5 to drive the motor 8 to move to one side of the coal dropping pipe body 1. At the same time, the motor 8 drives the spiral auger 9 to rotate into the coal in the coal dropping pipe body 1. Then the servo motor 6 is turned off, and the motor 8 continues to run. The rotating spiral auger 9 can transport the blocked coal in the coal dropping pipe body 1 to the outer conveying pipe 2 of the auger, and finally discharge it from the coal discharge pipe 3. The coal blocked in the coal dropping pipe body 1 can be automatically unblocked, which greatly reduces the labor burden of maintenance personnel, improves work efficiency, and can be unblocked in time to avoid affecting power generation. Then, according to the increase in the amount of coal dropped, the unblocking equipment is exited from operation.

[0037] Among them, after starting the servo motor 6, the servo motor 6 can drive the threaded screw 53 on the mobile platform 5 to rotate, and the rotating threaded screw 53 can drive the slider 54 to move, and the moving slider 54 cooperates with the fixed frame 7 to drive the motor 8 to approach or move away from the coal drop pipe body 1.

[0038] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A device for clearing the blockage of a coal chute of a coal feeder in a thermal power plant, comprising a coal chute body (1), characterized in that: The outer circumferential surface of the coal drop pipe body (1) is fixedly connected to an auger outer conveying pipe (2), the outer circumferential surface of the auger outer conveying pipe (2) is fixedly connected to a coal discharge pipe (3), the lower end of the coal discharge pipe (3) is fixedly connected to a valve (31), the lower end of the valve (31) is fixedly connected to a coal feeder side system coal drop pipe (32), the lower end of the coal feeder side system coal drop pipe (32) is fixedly connected to a coal feeder body (33), and the coal feeder body (33) is connected to the coal drop pipe body (1); A connecting piece (4) is fixedly connected to the outer circumferential surface of one end of the auger outer conveying pipe (2), one end of the connecting piece (4) is fixedly connected to a mobile platform (5), a power input end of the mobile platform (5) is fixedly connected to a servo motor (6), a power output end of the mobile platform (5) is fixedly connected to a fixed frame (7), one side of the fixed frame (7) is fixedly connected to a motor (8), an output end of the motor (8) is fixedly connected to a second coupling (81), one end of the second coupling (81) is fixedly connected to a spiral auger (9), one end of the spiral auger (9) passes through the auger outer conveying pipe (2) and extends into the coal drop pipe body (1).

2. The device for clearing the blockage of the coal drop pipe of the coal feeder in a thermal power plant according to claim 1, characterized in that: The mobile platform (5) comprises a mounting plate (51), a guide rail (52), a threaded screw (53) and a slider (54); a pair of guide rails (52) are fixedly connected to the surface of the mounting plate (51); a slider (54) is slidably connected to the guide rail (52); a threaded screw (53) passes through the center of the slider (54) and is threadedly connected; the servo motor (6) is fixedly connected to one end of the mounting plate (51); a coupling (61) is fixedly connected to the output end of the servo motor (6); one end of the coupling (61) is connected to the threaded screw (53); and the fixing frame (7) is fixedly connected to one side of the slider (54).

3. The device for clearing the blockage of the coal drop pipe of the coal feeder in a thermal power plant according to claim 1, characterized in that: One end of the auger outer delivery pipe (2) is fixedly connected to a cover body (21), and one end of the cover body (21) is fixedly connected to an air valve (22).

4. The device for clearing the blockage of the coal drop pipe of a coal feeder in a thermal power plant according to claim 1, characterized in that: A reinforcing rod (11) is fixedly connected to the outer circumferential surface of the coal drop pipe body (1), and one end of the reinforcing rod (11) is fixed to the outer circumferential surface of the auger outer conveying pipe (2).

5. The device for clearing the blockage of the coal drop pipe of the coal feeder in a thermal power plant according to claim 1, characterized in that: A pair of bearings (71) are fixedly connected to the fixing frame (7), and the inner walls of the pair of bearings (71) are fixed to the outer circumferential surface of the spiral auger (9).

6. The device for clearing the blockage of the coal drop pipe of a coal feeder in a thermal power plant according to claim 1, characterized in that: The auger outer delivery pipe (2) comprises a delivery pipe I (23) and a delivery pipe II (24), and the delivery pipe I (23) and the delivery pipe II (24) are flange-connected.

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