Coal conveying system for thermal power generation

Abstract

The thermal power generation coal conveying system comprises a coal feeding pipe, a coal feeding mechanism and a dredging mechanism, a coal feeding hopper is arranged at the upper end of the coal feeding pipe, a vertical coal falling pipe is arranged on the side, away from the coal feeding hopper, of the coal feeding pipe, a coal feeding shell is arranged at the lower end of the coal falling pipe, and a falling opening is formed in the front side of the bottom wall of the coal feeding shell; the coal feeding mechanism is arranged in the coal feeding shell, the dredging mechanism comprises a dredging assembly, the dredging assembly comprises a dredging steel chisel, a drill bit and a dredging iron chain, the thermal power generation coal conveying system is provided with an automatic dredging device, the dredging steel chisel moves up and down to drive the drill bit to crush and dredge blocked coal briquettes, and the dredging steel chisel moves up and down to drive the drill bit to dredge the blocked coal briquettes. The dredging iron chain vibrates up and down and rubs with the inner wall of the coal falling pipe, coal attached to the inner wall of the coal falling pipe is cleaned, the coal feeding device is further arranged, coal briquettes can be rapidly and quantitatively conveyed, meanwhile, coal briquette chippings can be rapidly cleaned, and the chippings are effectively prevented from entering equipment to damage the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power generation, and in particular to a coal conveying system for thermal power generation. Background Art

[0002] Thermal power generation (such as coal, natural gas or oil, etc.) is an important part of the power supply, accounting for about 60% of the total power generation in the country. Compared with other fuels (such as natural gas and oil), the price of coal is usually relatively low, especially in areas with rich coal resources. Therefore, coal combustion has certain economic advantages in power production. Up to now, coal combustion has always occupied an important position in thermal power generation. The coal transportation system of a thermal power plant is an important part of the thermal power plant, responsible for transporting coal from the coal storage yard to the boiler room for power generation. The existing coal transportation system of a thermal power plant consists of a conveying device and a coal feeding device. The coal blocks after crushing by a crusher, impurity removal by a magnetic separator and screening by a screening machine are sent to the coal hopper and then passed through the The coal is sent into the coal conveying pipe through a conveyor belt and then to the inside of the coal feeder. The conveyor belt inside the coal feeder evenly sends the coal blocks into the boiler through the drop port. When the traditional coal conveying system of a thermal power plant is working, the coal conveying pipe is prone to blockage when the coal conveying volume is too large. It is necessary to stop the machine and manually use a steel chisel to clear the coal conveying pipe. Manual clearing has a large labor burden and affects the coal conveying efficiency. When a conveyor belt coal feeder is used to transport coal blocks, at the same time, the coal blocks in front have entered the boiler, while the coal blocks in the back are still on the conveyor belt. The coal blocks cannot be transported quickly and quantitatively, affecting the combustion efficiency of the boiler. The friction between the coal blocks will also produce a large amount of debris, which is easy to damage the equipment if not cleaned in time. For this reason, we propose a coal conveying system for thermal power generation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a thermal power generation coal conveying system, which is equipped with an automatic dredging device. The dredging steel drill is driven by the up and down movement of the drill head to crush and dredge the blocked coal blocks. The dredging iron chain is oscillated up and down and rubbed against the inner wall of the coal drop pipe to clean the coal adhering to the inner wall of the coal drop pipe. A coal feeding device is also provided, which can quickly and quantitatively convey coal blocks and quickly clean coal block debris, effectively preventing debris from entering the equipment and damaging the equipment, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A coal conveying system for thermal power generation, comprising a coal feeding pipe, a coal feeding mechanism and a dredging mechanism;

[0005] Coal feeding pipe: a coal feeding hopper is arranged at the upper end thereof, a vertical coal dropping pipe is arranged at the side of the coal feeding pipe away from the coal feeding hopper, a coal feeding shell is arranged at the lower end of the coal dropping pipe, and a dropping opening is arranged at the front side of the bottom wall of the coal feeding shell;

[0006] Coal feeding mechanism: it is arranged inside the coal feeding shell;

[0007] Dredging mechanism: It includes a dredging component, which includes a dredging steel bar, a bar head and a dredging iron chain. The dredging steel bar is arranged inside the coal drop pipe, the bar head is arranged at the lower end of the dredging steel bar, and the dredging iron chain is arranged at the lower end of the coal drop pipe. The dredging iron chain is distributed in a ring shape around the axis of the dredging steel bar, providing a basis for dredging and crushing coal blocks. An automatic dredging device is provided, which drives the bar head to crush and dredge the blocked coal blocks through the up and down movement of the dredging steel bar, and cleans the coal material adhered to the inner wall of the coal drop pipe by the up and down vibration of the dredging iron chain and the friction with the inner wall of the coal drop pipe. A coal feeding device is also provided, which can quickly and quantitatively transport coal blocks and quickly clean coal block debris, effectively preventing debris from entering the equipment and damaging the equipment.

[0008] Furthermore, the coal feeding mechanism includes a guide rail, a limit block, a scraper, a baffle and a torsion spring, the guide rails are respectively arranged at the upper and lower ends of the right side wall of the coal feeding shell, the limit blocks are slidably connected to the inside of the guide rails, the scrapers are arranged on the left side of the limit blocks through the connecting shafts, the baffles are rotatably connected to the outer surface of the laterally adjacent connecting shafts, and the scrapers and baffles form an integral coal feeding device, and the side of the scraper in contact with the baffle is provided with an installation groove, and the inside of the installation groove is provided with a torsion spring, which is sleeved on the outer surface of the connecting shaft to provide a basis and limit for the transportation of coal blocks.

[0009] Furthermore, the coal feeding mechanism also includes a transmission belt, which is respectively arranged in the middle of the left and right side walls of the coal feeding shell, and the input end of the transmission belt is electrically connected to the output end of the external control room. The side of the baffle close to the middle of the coal feeding shell is fixedly connected to the outer surface of the belt body of the transmission belt, providing stable drive for the transportation of coal blocks.

[0010] Furthermore, the coal feeding mechanism also includes a cleaning component, which includes a roller brush and a roller. The roller brushes are rotatably connected to the side of the baffle away from the scraper. The outer surface of the roller brush is provided with evenly distributed bristles. The roller is arranged at the right end of the roller brush. The outer edge of the roller is installed in cooperation with the bottom wall of the coal feeding shell, providing a basis for cleaning coal debris.

[0011] Furthermore, the coal feeding mechanism also includes an air blowing assembly, which includes an air intake pipe and an air blowing pipe. The air intake pipe is arranged on the inner front side of the right transmission belt, and the air blowing pipe is arranged between the two transmission belts. The air intake pipe is connected to the air blowing pipe, and the rear side of the air blowing pipe is provided with evenly distributed nozzles to further reduce the falling of coal fragments.

[0012] Furthermore, the dredging mechanism also includes a guide assembly, which includes a first square rod, a second square tube, a first round tube and a sliding groove. A dredging cover is provided on the right side of the upper end of the coal feeding pipe. The first square rod is arranged on the right side of the upper end of the dredging cover, the second square tube is arranged in the middle of the upper end of the dredging cover, the first round tube is arranged inside the second square tube, the dredging steel chisel is arranged inside the first round tube, and the sliding groove is opened inside the first round tube to provide a guide for the movement of the dredging steel chisel.

[0013] Furthermore, the unclogging component also includes a keyway, an oblong key and a threaded hole. The keyway is opened at the upper end of the outer surface of the unclogging steel bar, the oblong key passes through the sliding groove and is adapted to the keyway, and the threaded hole is opened inside the unclogging steel bar to provide a limiting effect for the movement of the unclogging steel bar.

[0014] Furthermore, the dredging mechanism also includes a driving assembly, which includes a driving motor, a driving screw and a lifting ring. The driving motor is arranged at the upper end of the dredging steel drill, the input end of the driving motor is electrically connected to the output end of the external control room, the driving screw is arranged at the lower end of the output shaft of the driving motor, the outer surface of the driving screw is threadedly connected to the threaded hole, and the lifting ring is arranged at the upper end of the driving motor to provide stable drive for the dredging work.

[0015] Furthermore, the dredging mechanism also includes a lifting assembly, which includes an electric hoist, a lifting hook and a sliding sleeve. A connecting frame is provided at the upper end of the first square rod, the electric hoist is provided at the lower end of the connecting frame, the input end of the electric hoist is electrically connected to the output end of the external control room, the lifting hook is provided at the lower end of the electric hoist through a steel cable, the lifting ring is adapted to the lifting hook, the sliding sleeve is provided at the lower end of the driving motor, and the sleeve mouth of the sliding sleeve is adapted to the first square rod, so as to provide a stable drive for the movement of the dredging steel drill.

[0016] Furthermore, it also includes a feeding belt rack, a feeding belt rack and a screw conveyor, wherein the feeding belt rack is arranged inside the coal feeding pipe, the input end of the feeding belt rack is electrically connected to the output end of the external control room, the feeding plate is arranged on the right side of the feeding belt rack, the upper left side of the feeding plate is in contact with the belt conveying surface of the lower end of the feeding belt rack, the screw conveyor is arranged in the middle of the right side of the coal feeding shell, the input end of the screw conveyor is electrically connected to the output end of the external control room, the feed port of the screw conveyor is fixedly connected to the lower end of the coal drop pipe, and the discharge port of the screw conveyor is located in the middle of the interior of the coal feeding shell, providing a basis for the transportation of coal blocks.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the coal conveying system for thermal power generation has the following advantages:

[0018] 1. The driving motor drives the driving screw to rotate. The driving screw interacts with the threaded rod and the threaded hole. Under the connection of the long round key, the sliding groove and the keyway, the dredging steel drill moves up and down to drive the drill head to crush and dredge the blocked coal blocks, and dredge the blocked coal drop pipe to avoid the coal blocks from clogging in the coal drop pipe.

[0019] 2. The dredging iron chain at the end oscillates up and down to rub against the inner wall of the coal drop pipe to clean the coal adhering to the inner wall of the coal drop pipe.

[0020] 3. The coal delivery device is composed of a scraper and a baffle. The guide rail limits the scraper through the limit block. The transmission belt works with the coal delivery device to shovel the coal blocks. When it reaches the top of the drop port, the limit block leaves the inside of the guide rail and loses the restriction. The scraper is deflected downward by the gravity of the coal blocks above, and all the coal blocks fall into the boiler, so the coal blocks can be transported quickly and quantitatively.

[0021] 4. Compressed air is used to blow the debris in the coal blocks flowing out of the discharge port of the screw feeder into the coal feeding device. When the previous coal feeding device moves, the roller contacts the bottom wall of the coal feeding shell and rotates, driving the roller brush to rotate, and the debris on the bottom wall of the coal feeding shell is swept into the next coal feeding device. Blowing through the air pipe and cleaning with the roller brush can quickly clean the coal block debris to prevent the accumulation of coal block debris from damaging the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the dredging mechanism of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the dredging mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the partial enlarged structure of B of the present invention;

[0026] Figure 5 This is a schematic diagram of the partially enlarged structure of location A of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the guide assembly of the present invention;

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the coal feeding mechanism of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the coal feeding mechanism of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the cleaning component of the present invention.

[0031] In the figure: 1 coal feeding pipe, 2 coal feeding hopper, 3 coal dropping pipe, 4 dredging cover, 5 coal feeding shell, 6 coal feeding mechanism, 61 guide rail, 62 limit block, 63 scraper, 64 baffle, 65 torsion spring, 66 transmission belt, 67 cleaning component, 671 roller brush, 672 roller, 68 blowing component, 681 air intake pipe, 68 blowing pipe, 7 dredging mechanism, 71 dredging component, 711 dredging steel drill, 712 drill head, 713 dredging Iron chain, 714 keyway, 715 long round key, 716 threaded hole, 72 guide assembly, 721 first square rod, 722 second square tube, 723 first round tube, 724 sliding groove, 73 drive assembly, 731 drive motor, 732 drive screw, 733 lifting ring, 74 lifting assembly, 741 electric hoist, 742 lifting hook, 743 sliding sleeve, 8 feeding belt rack, 9 feeding plate, 10 screw conveyor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-9 , this embodiment provides a technical solution: a coal conveying system for thermal power generation, comprising a coal feeding pipe 1, a coal feeding mechanism 6 and a dredging mechanism 7;

[0034] Coal feeding pipe 1: a coal feeding hopper 2 is arranged at the upper end thereof, the coal feeding pipe 1 is a horizontal round pipe, a vertical coal dropping pipe 3 is arranged at the side of the coal feeding pipe 1 away from the coal feeding hopper 2, a coal feeding shell 5 is arranged at the lower end of the coal dropping pipe 3, and a material dropping opening is opened at the front side of the bottom wall of the coal feeding shell 5;

[0035] Coal feeding mechanism 6: It is arranged inside the coal feeding shell 5. The coal feeding mechanism 6 includes a guide rail 61, a limit block 62, a scraper 63, a baffle 64 and a torsion spring 65. The guide rail 61 is respectively arranged at the upper and lower ends of the right side wall of the coal feeding shell 5. The limit blocks 62 are slidably connected to the inside of the guide rail 61. The limit blocks 62 are square blocks. The scrapers 63 are arranged on the left side of the limit blocks 62 through the connecting shaft. The baffles 64 are rotatably connected to the outer surface of the laterally adjacent connecting shafts. The scrapers 63 and the baffles 64 are both The coal feeding device is formed as a whole. The scraper 63 and the baffle 64 are provided with mounting grooves on the sides in contact with each other. Torsion springs 65 are provided inside the mounting grooves. The torsion springs 65 are sleeved on the outer surface of the connecting shaft to provide a basis and limit for the transportation of coal blocks. The coal feeding mechanism 6 also includes a transmission belt 66. The transmission belt 66 is respectively arranged in the middle of the left and right side walls of the coal feeding shell 5. The input end of the transmission belt 66 is electrically connected to the output end of the external control room. The baffle 64 is close to the middle of the coal feeding shell 5 on one side and connected to the transmission belt 66. The outer surface of the belt body 66 is fixedly connected to provide a stable drive for the transportation of coal blocks. The coal feeding mechanism 6 also includes a cleaning component 67, which includes a roller brush 671 and a roller 672. The roller brush 671 is rotatably connected to the side of the baffle 64 away from the scraper 63. The outer surface of the roller brush 671 is provided with evenly distributed bristles. The roller 672 is arranged at the right end of the roller brush 671. The roller 672 is a rubber wheel. The outer edge of the roller 672 is installed in cooperation with the bottom wall of the coal feeding shell 5 to provide a stable drive for the transportation of coal blocks. To provide a basis for cleaning the debris, the coal feeding mechanism 6 also includes a blowing assembly 68, which includes an air intake pipe 681 and an air intake pipe 68. The air intake pipe 681 is arranged at the inner front side of the right transmission belt 66, and the air intake pipe 681 is connected to an external air compressor. The air intake pipe 68 is arranged between the two transmission belts 66, and the air intake pipe 681 is connected to the air intake pipe 68. The rear side of the air intake pipe 68 is provided with uniformly distributed nozzles, and the nozzles are all tilted downward to further reduce the falling of coal debris.

[0036] The dredging mechanism 7 includes a dredging assembly 71, which includes a dredging steel drill 711, a drill head 712 and a dredging iron chain 713. The dredging steel drill 711 is arranged inside the coal drop pipe 3, and the drill head 712 is arranged at the lower end of the dredging steel drill 711. The lower end of the drill head 712 is pointed. When the coal drop pipe 3 is blocked, the pointed drill head 712 can easily push open the part blocked by coal blocks, and crush larger coal blocks at the same time. The dredging iron chain 713 is arranged at the lower end of the coal drop pipe 3. The dredging iron chain 713 is distributed in a ring shape around the axis of the dredging steel drill 711. There are three dredging iron chains 713. The dredging steel drill 711 moves up and down under the action of the lifting assembly, driving the drill head 712 to crush and dredge the blocked coal blocks. At the same time, the dredging iron chain 713 at the end The up and down vibrations rub against the inner wall of the coal drop pipe 3 to clean the coal material adhered to the inner wall of the coal drop pipe 3, providing a basis for the dredging and crushing of coal blocks. The dredging mechanism 7 also includes a guide assembly 72, which includes a first square rod 721, a second square tube 722, a first round tube 723 and a sliding groove 724. A dredging cover 4 is provided on the right side of the upper end of the coal feeding pipe 1. The first square rod 721 is arranged on the right side of the upper end of the dredging cover 4, the second square tube 722 is arranged in the middle of the upper end of the dredging cover 4, the first round tube 723 is arranged inside the second square tube 722, the dredging steel chisel 711 is arranged inside the first round tube 723, and the sliding groove 724 is opened inside the first round tube 723 to provide a guiding effect for the movement of the dredging steel chisel 711. The dredging assembly 71 also includes a keyway 714, an elongated round Key 715 and threaded hole 716, keyway 714 is arranged at the upper end of the outer surface of the dredging steel drill 711, the long round key 715 passes through the sliding groove 724 and is adapted to the keyway 714, the threaded hole 716 is arranged inside the dredging steel drill 711, and provides a limiting effect for the movement of the dredging steel drill 711, the dredging mechanism 7 also includes a driving assembly 73, the driving assembly 73 includes a driving motor 731, a driving screw 732 and a lifting ring 733, the driving motor 731 is arranged at the upper end of the dredging steel drill 711, the input end of the driving motor 731 is electrically connected to the output end of the external control room, the driving screw 732 is arranged at the lower end of the output shaft of the driving motor 731, the outer surface of the driving screw 732 is threadedly connected to the threaded hole 716, and the lifting ring 733 is arranged at the At the upper end, the driving motor 731 drives the driving screw 732 to rotate, and the driving screw 732 interacts with the threaded rod and the threaded hole 716. Under the connection of the long round key 715, the sliding groove 724 and the key groove 714, the dredging steel chisel 711 moves up and down without rotating, dredging the coal drop pipe 3, and providing stable drive for the dredging work. The dredging mechanism 7 also includes a lifting component 74, and the lifting component 74 includes an electric hoist 741, a lifting hook 742 and a sliding sleeve 743. A connecting frame is provided at the upper end of the first square rod 721, and the electric hoist 741 is provided at the lower end of the connecting frame. The input end of the electric hoist 741 is electrically connected to the output end of the external control room. The lifting hook 742 is provided at the lower end of the electric hoist 741 through a steel cable, and the lifting ring 733 is adapted to the lifting hook 742.The sliding sleeve 743 is arranged at the lower end of the driving motor 731, and the sleeve opening of the sliding sleeve 743 is adapted to the first square rod 721. When cleaning the lower end of the coal drop pipe 3, the electric hoist 741 drives the lifting hook 742 to adjust the driving motor 731 to descend, and the driving motor 731 drives the second square pipe 722 to descend a certain distance, so that the lower end of the dredging steel drill 711 completely passes through the coal drop pipe 3 and drives the dredging iron chain 713 to pass through the lower end outlet of the coal drop pipe 3, so that the dredging iron chain 713 vibrates to clean the lower end outlet of the coal drop pipe 3, so as to prevent the coal block from sticking to the lower end outlet of the coal drop pipe 3 and affecting the In order to prevent the coal from falling, the sliding sleeve 743 is used to prevent the second square tube 722 from deflecting during the up and down sliding process of the driving motor 731, so as to stably drive the movement of the steel drill 711. It also includes a feeding belt frame 8, a feeding belt frame 9 and a screw conveyor 10. The feeding belt frame 8 is arranged inside the coal feeding pipe 1, and the input end of the feeding belt frame 8 is electrically connected to the output end of the external control room. The left side of the feeding belt frame 8 is located at the left side below the coal feeding hopper 2, so that the coal in the coal feeding hopper 2 falls on the belt conveyor on the feeding belt frame 8. The right end of the feeding belt frame 8 is located at the coal dropping pipe 3. The feeding plate 9 is arranged on the right side of the feeding belt frame 8, and the upper left part of the feeding plate 9 is in contact with the belt conveying surface of the lower end of the feeding belt frame 8. An inclined feeding plate 9 is arranged on the right side of the feeding belt frame 8, and the upper left part of the feeding plate 9 is in contact with the belt conveying surface of the lower end of the feeding belt frame 8, and the coal material adhered to the feeding belt frame 8 is further scraped off, so as to ensure the surface cleanness of the feeding belt frame 8 after transportation. The screw conveyor 10 is arranged in the middle of the right side of the coal feeding shell 5, and the input end of the screw conveyor 10 is electrically connected to the output end of the external control room. The feed port of the screw feeder 10 is fixedly connected to the lower end of the coal drop pipe 3. The discharge port of the screw feeder 10 is located in the middle of the coal feeding shell 5, providing a basis for the transportation of coal blocks. An automatic dredging device is provided. The dredging steel drill 711 moves up and down to drive the drill head 712 to crush and dredge the blocked coal blocks. The dredging iron chain 713 oscillates up and down and rubs against the inner wall of the coal drop pipe to clean the coal material adhering to the inner wall of the coal drop pipe. A coal feeding device is also provided, which can quickly and quantitatively transport coal blocks and quickly clean coal block debris, effectively preventing debris from entering the equipment and damaging the equipment.

[0037] The working principle of a thermal power generation coal conveying system provided by the present invention is as follows: when conveying coal, the coal blocks that have been crushed by a crusher, removed impurities by a magnetic separator and screened by a screener are fed into a coal feed hopper 2, and the funnel-shaped coal feed hopper 2 allows the coal blocks to quickly fall onto a feeding belt frame 8, and an external control room controls the operation of the feeding belt frame 8, and the feeding belt frame 8 feeds the coal blocks into a coal drop pipe 3, and a feeding plate 9 scrapes off the coal attached to the belt conveying surface at the lower end of the belt frame 8, thereby ensuring that the surface of the feeding belt frame 8 after conveying is clean, and the coal blocks pass through the coal drop pipe 3 and enter the interior of a screw conveyor 10, and then are conveyed by the screw conveyor 10 into a coal feeding shell 5, and when the coal blocks flow out from the discharge port of the screw conveyor 10, the external air compressor works, and compressed air is pumped into the feeder 10. The air enters the blowing pipe 68 from the air inlet pipe 681, and then is ejected from the nozzle, blowing most of the debris generated by the friction of the coal blocks into the coal delivery device composed of the scraper 63 and the baffle 64. At the same time, the external control room controls the operation of the transmission belt 66, and the two transmission belts 66 rotate backward synchronously to drive the coal delivery device to move. The scraper 63 scoops up the coal blocks. As the transmission belt 66 rotates, the coal delivery device moves forward, and the limit block 62 also moves forward inside the guide rail 61. The square limit block 62 can effectively prevent the scraper 63 from deflecting downward. When the coal delivery device moves to above the drop port, the limit block 62 just leaves the inside of the guide rail 61, and the limit block 62 loses its restriction. The scraper 63 is deflected downward by the gravity of the coal blocks above, and the torsion spring 65 is deformed under the force. The coal blocks of the square enter the boiler through the drop opening at the same time. When all the coal blocks above the scraper 63 fall down, the gravity above the scraper 63 disappears, and the torsion spring 65 drives the scraper 63 back to its original position. With the rotation of the transmission belt 66, the coal delivery device moves to the top of the transmission belt 66, and the limit block 62 also enters the upper guide rail 61. The rear coal delivery device continues this step, and so on. At the same time, with the movement of the coal delivery device, the roller brush 671 and the roller 672 also move accordingly. With the movement of the roller brush 671, the roller 672 contacts the bottom wall of the coal feeding shell 5. The friction force causes the roller 672 to rotate, and the roller brush 671 also rotates accordingly, sweeping the coal block debris on the bottom wall of the coal feeding shell 5 into the rear coal delivery device, and the air blowing pipe 68 blows air and the roller brush 671 cleans The sweep can quickly clean up the coal debris to prevent the accumulation of coal debris and damage to the equipment. After a period of time, as the amount of coal transported increases, the coal will accumulate and block the inside of the coal drop pipe 3, and it needs to be dredged. The electric hoist 741 drives the lifting hook 742 to adjust the driving motor 731 to descend, and the driving motor 731 drives the second square pipe 722 to descend a certain distance, so that the lower end of the dredging steel drill 711 completely passes through the coal drop pipe 3 and drives the dredging iron chain 713 to pass through the lower end outlet of the coal drop pipe 3, so that the dredging iron chain 713 vibrates to clean the lower end outlet of the coal drop pipe 3, so as to prevent the coal from sticking to the lower end outlet of the coal drop pipe 3 and affecting the falling of coal. The sliding sleeve 743 is used to prevent the second square pipe 722 from deviating during the up and down sliding of the driving motor 731. In this process,The driving motor 731 drives the driving screw 732 to rotate. The driving screw 732 interacts with the threaded rod and the threaded hole 716. Under the connection of the long round key 715, the sliding groove 724 and the key groove 714, the dredging steel drill 711 moves up and down to drive the drill head 712 to crush and dredge the blocked coal blocks, and dredge the blocked coal drop pipe 3 to prevent the coal blocks from clogging the coal drop pipe 3. The dredging iron chain 713 at the end oscillates up and down to rub against the inner wall of the coal drop pipe 3 to clean the coal materials adhering to the inner wall of the coal drop pipe 3.

[0038] It is worth noting that the transmission belt 66 disclosed in the above embodiment is a PD-800 transmission belt, the drive motor 731 is an SF-90 motor, the electric hoist 741 is a GM electric hoist, the feed belt frame 8 is an RB-20 feed belt frame, and the screw conveyor 10 is a GX200 screw conveyor. The external control room controls the operation of the transmission belt 66, the drive motor 731, the electric hoist 741, the feed belt frame 8 and the screw conveyor 10 using methods commonly used in the prior art. The control switch group in the external control room is provided with switch buttons corresponding to the transmission belt 66, the drive motor 731, the electric hoist 741, the feed belt frame 8 and the screw conveyor 10 for controlling their switch operations.

[0039] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A coal transportation system for thermal power generation, characterized by: It comprises a coal feeding pipe (1), a coal feeding mechanism (6) and a dredging mechanism (7); A coal feeding pipe (1): a coal feeding hopper (2) is arranged at the upper end thereof, a vertical coal dropping pipe (3) is arranged at the side of the coal feeding pipe (1) away from the coal feeding hopper (2), a coal feeding shell (5) is arranged at the lower end of the coal dropping pipe (3), and a coal dropping opening is arranged at the front side of the bottom wall of the coal feeding shell (5); Coal feeding mechanism (6): arranged inside the coal feeding housing (5); The dredging mechanism (7) comprises a dredging assembly (71), wherein the dredging assembly (71) comprises a dredging steel drill (711), a drill head (712) and a dredging iron chain (713), wherein the dredging steel drill (711) is arranged inside the coal drop pipe (3), the drill head (712) is arranged at the lower end of the dredging steel drill (711), the dredging iron chain (713) is arranged at the lower end inside the coal drop pipe (3), and the dredging iron chain (713) is distributed in a ring shape around the axis of the dredging steel drill (711).

2. A coal conveying system for thermal power generation according to claim 1, characterized in that: The coal feeding mechanism (6) comprises a guide rail (61), a limit block (62), a scraper (63), a baffle (64) and a torsion spring (65). The guide rail (61) is respectively arranged at the upper and lower ends of the right side wall of the coal feeding shell (5). The limit blocks (62) are slidably connected to the inside of the guide rail (61). The scrapers (63) are arranged on the left side of the limit blocks (62) through a connecting shaft. The baffles (64) are rotatably connected to the outer surface of the laterally adjacent connecting shaft. The scrapers (63) and the baffles (64) form an integral coal feeding device. The scrapers (63) and the baffles (64) are each provided with an installation groove on the side in contact with the baffle (64). The installation groove is provided with a torsion spring (65). The torsion spring (65) is sleeved on the outer surface of the connecting shaft.

3. A coal conveying system for thermal power generation according to claim 2, characterized in that: The coal feeding mechanism (6) further comprises a transmission belt (66), wherein the transmission belt (66) is respectively arranged at the middle of the left and right side walls of the coal feeding shell (5), the input end of the transmission belt (66) is electrically connected to the output end of the external control room, and the side of the baffle (64) close to the middle of the coal feeding shell (5) is fixedly connected to the outer surface of the belt body of the transmission belt (66).

4. A coal conveying system for thermal power generation according to claim 3, characterized in that: The coal feeding mechanism (6) further comprises a cleaning assembly (67), wherein the cleaning assembly (67) comprises a roller brush (671) and a roller (672), wherein the roller brush (671) is rotatably connected to a side of the baffle (64) away from the scraper (63), and the outer surface of the roller brush (671) is provided with evenly distributed bristles, and the roller (672) is arranged at the right end of the roller brush (671), and the outer edge of the roller (672) is mounted in cooperation with the bottom wall of the coal feeding shell (5).

5. A coal conveying system for thermal power generation according to claim 2, characterized in that: The coal feeding mechanism (6) further comprises an air blowing assembly (68), the air blowing assembly (68) comprising an air inlet pipe (681) and an air blowing pipe (68), the air inlet pipe (681) being arranged at the inner front side of the right transmission belt (66), the air blowing pipe (68) being arranged between the two transmission belts (66), the air inlet pipe (681) being connected to the air blowing pipe (68), and the rear side of the air blowing pipe (68) being provided with uniformly distributed nozzles.

6. A coal conveying system for thermal power generation according to claim 1, characterized in that: The dredging mechanism (7) further comprises a guide assembly (72), the guide assembly (72) comprising a first square rod (721), a second square tube (722), a first round tube (723) and a sliding groove (724); a dredging cover (4) is provided on the right side of the upper end of the coal feeding pipe (1); the first square rod (721) is arranged on the right side of the upper end of the dredging cover (4); the second square tube (722) is arranged at the middle part of the upper end of the dredging cover (4); the first round tube (723) is arranged inside the second square tube (722); the dredging steel chisel (711) is arranged inside the first round tube (723); and the sliding groove (724) is opened inside the first round tube (723).

7. A coal conveying system for thermal power generation according to claim 6, characterized in that: The dredging assembly (71) further comprises a keyway (714), an oblong key (715) and a threaded hole (716); the keyway (714) is provided at the upper end of the outer surface of the dredging steel bar (711); the oblong key (715) passes through the sliding groove (724) and is adapted to the keyway (714); and the threaded hole (716) is provided inside the dredging steel bar (711).

8. A coal conveying system for thermal power generation according to claim 7, characterized in that: The dredging mechanism (7) also includes a driving assembly (73), which includes a driving motor (731), a driving screw (732) and a lifting ring (733). The driving motor (731) is arranged at the upper end of the dredging steel drill (711), the input end of the driving motor (731) is electrically connected to the output end of the external control room, the driving screw (732) is arranged at the lower end of the output shaft of the driving motor (731), the outer surface of the driving screw (732) is threadedly connected to the threaded hole (716), and the lifting ring (733) is arranged at the upper end of the driving motor (731).

9. A coal conveying system for thermal power generation according to claim 8, characterized in that: The dredging mechanism (7) further comprises a lifting assembly (74), the lifting assembly (74) comprising an electric hoist (741), a lifting hook (742) and a sliding sleeve (743); a connecting frame is arranged at the upper end of the first square rod (721); the electric hoist (741) is arranged at the lower end of the connecting frame; the input end of the electric hoist (741) is electrically connected to the output end of the external control room; the lifting hook (742) is arranged at the lower end of the electric hoist (741) through a steel cable; the lifting ring (733) is matched with the lifting hook (742); the sliding sleeve (743) is arranged at the lower end of the driving motor (731); and the sleeve opening of the sliding sleeve (743) is matched with the first square rod (721).

10. A coal conveying system for thermal power generation according to claim 1, characterized in that: The invention also comprises a feeding belt frame (8), a feeding belt frame (9) and a screw conveyor (10), wherein the feeding belt frame (8) is arranged inside the coal feeding pipe (1), the input end of the feeding belt frame (8) is electrically connected to the output end of the external control room, the feeding plate (9) is arranged on the right side of the feeding belt frame (8), the upper left side of the feeding plate (9) is in contact with the belt conveying surface of the lower end of the feeding belt frame (8), the screw conveyor (10) is arranged in the middle of the right side of the coal feeding shell (5), the input end of the screw conveyor (10) is electrically connected to the output end of the external control room, the feeding port of the screw conveyor (10) is fixedly connected to the lower end of the coal dropping pipe (3), and the discharge port of the screw conveyor (10) is located in the middle of the inside of the coal feeding shell (5).

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