Optimized curve type anti-blocking and unblocking mechanism for eccentric raw coal bunker

Abstract

The invention discloses an optimized curve type anti-blocking and unblocking mechanism for an eccentric raw coal bunker, which is characterized in that an optimized curve type coal hopper is smoothly communicated with a bunker outlet of the eccentric raw coal bunker, and a two-way pneumatic slide plate gate for circulating and stopping coal particles is arranged between the optimized curve type coal hopper and the eccentric raw coal bunker; a coal feeder is arranged at an outlet in the lower end of the optimized curve type coal hopper, the center of an outlet of the optimized curve type coal hopper is concentric with the center line of an inlet of the coal feeder, a blockage clearing structure is arranged in the optimized curve type coal hopper and comprises an arc-shaped supporting pipe, and a high-pressure spray head is installed on the arc-shaped supporting pipe. By optimizing the design of the curve type coal hopper, the discharging smoothness of the raw coal bunker is improved, and the phenomenon of material blockage is effectively prevented; secondly, the bidirectional pneumatic slide plate gate controls circulation of coal particles, adapts to different particle flowing speeds, and prevents accumulation; in addition, the coal feeder is arranged to ensure that coal particles completely enter the conveying system, and scattering leakage is reduced; in addition, the high-pressure nozzles prevent arching and blocking, and the operation stability of the boiler is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal industry, in particular to an optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker. Background Art

[0002] At present, in the coal transportation system of the boiler of coal-fired power plants, the raw coal hopper is an important component for coal storage and transportation, and its efficient operation is crucial. However, the raw coal hopper is easily affected by moisture or mixed with coal slime, which causes coal powder to stick to the wall, form arches, and block, seriously affecting the stable operation of the boiler.

[0003] The existing methods to solve the problem of coal hopper blockage mainly include manual knocking and dredging, installing air cannons and installing high-frequency vibrators. However, while these methods can alleviate the coal blockage phenomenon to a certain extent, they also have disadvantages: manual knocking is relatively time-consuming and labor-intensive, and lacks precise control over the determination and dredging of blockages; although air cannons can produce strong airflow impact, they are easy to cause coal powder to fly, affecting the working environment and coal quality; although high-frequency vibrators can effectively vibrate and loosen coal, the effect is difficult to achieve the expected effect for sticky coal or large blockages.

[0004] The existing technology is not targeted enough in solving the problem of coal blockage in the raw coal hopper, and cannot directly clean the coal particles adhered to the inside of the raw coal hopper and has the problem of low efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide an optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker, so as to solve the problem that the prior art proposed in the above background technology is insufficiently targeted and inefficient in solving the problem of coal blockage in the raw coal hopper.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] An optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker comprises an optimized curved coal hopper and an eccentric raw coal bunker, the optimized curved coal hopper is smoothly connected with the bunker outlet of the eccentric raw coal bunker, a two-way pneumatic gate for the circulation and interception of coal particles is installed between the optimized curved coal hopper and the eccentric raw coal bunker, a coal feeder is arranged at the lower end outlet of the optimized curved coal hopper, the outlet center of the optimized curved coal hopper is concentric with the inlet center line of the coal feeder, a clearing structure is arranged inside the optimized curved coal hopper, and the clearing structure comprises an arc-shaped support pipe, on which a high-pressure nozzle is installed.

[0008] Furthermore, the optimized curved coal hopper is an eccentric cylinder similar to a bull's horn, with a wide top opening fixedly connected to the bottom of the raw coal bin; the bottom of the optimized curved coal hopper is narrow for docking with the inlet of the coal feeder, and the center line of the internal cavity of the optimized curved coal hopper is offset from its geometric center.

[0009] Furthermore, the arc-shaped support tube is designed to extend along the center of the inner cavity of the optimized curved coal hopper, and has the same curvature as the central curve of the inner cavity of the optimized curved coal hopper. Both ends of the arc-shaped support tube extend to the outside of both ends of the optimized curved coal hopper, and the upper end of the arc-shaped support tube passes through the eccentric raw coal bin and extends to the outside thereof. Both ends of the arc-shaped support tube are fixedly connected to the outside with brackets.

[0010] Furthermore, the two plates of the bidirectional pneumatic plate door are symmetrically arranged on both sides of the arc-shaped support tube, and a groove adapted to the outer wall of the arc-shaped support tube is provided at one end close to the arc-shaped support tube.

[0011] Furthermore, the arc-shaped support tube is sealed at one end close to the coal feeder, and is provided with an air inlet away from the coal feeder. The air inlet of the arc-shaped support tube is connected to a high-pressure air pump through a pipeline, and high-pressure gas is transported to the inside of the arc-shaped support tube by the high-pressure air pump. A high-pressure nozzle is installed on the side wall of the arc-shaped support tube, tilted downward toward the inner wall of the optimized curved coal hopper, the air inlet end of the high-pressure nozzle is connected to the inside of the arc-shaped support tube, and an electromagnetic valve is installed inside the high-pressure nozzle.

[0012] Furthermore, the outside of the high-pressure air pump is connected to an air heater, and the air heater heats the air through a resistance wire or directly heats the air with infrared rays. A plurality of high-pressure nozzles are provided and are evenly distributed along the outside of the arc-shaped support tube.

[0013] Furthermore, a rotation drive assembly is installed between the high-pressure nozzle and the arc-shaped support tube, and the rotation drive assembly drives the high-pressure nozzle to rotate outside the arc-shaped support tube.

[0014] Furthermore, the rotary drive assembly includes an annular seat, which is fixedly connected to the outside of the arc-shaped support tube, one end of the annular seat is fixedly connected to a pneumatic chamber, a pneumatic slip ring is rotatably connected inside the pneumatic chamber, a rotating groove is provided at one end of the pneumatic chamber, one end of the pneumatic slip ring passes through the rotating groove and extends to the outside of the pneumatic chamber, slip ring sealing rings are installed between the two sides of the pneumatic slip ring and the rotating groove, a driving groove is provided at one end of the pneumatic slip ring located inside the pneumatic chamber, the driving groove is an annular groove, a plurality of pneumatic blades are fixedly connected inside the annular groove, and the plurality of pneumatic blades are distributed in a circular array inside the annular groove.

[0015] Furthermore, a high-pressure air duct is sleeved inside the arc-shaped support tube, one end of the air duct is sealed, and the other end thereof is fixedly connected to the high-pressure air pump, a high-pressure hose is fixedly connected between the pneumatic chamber and the high-pressure air duct, the air inlet end of the high-pressure hose is fixedly connected to the high-pressure air duct, and the air outlet end of the high-pressure hose enters the pneumatic chamber tangentially, the pneumatic slip ring is located on the outside of one end of the pneumatic chamber and a high-pressure nozzle is installed on the outside, a ring airway and a straight airway are provided inside the pneumatic slip ring, the ring airway is annular and coaxial with the pneumatic slip ring, the straight airway is perpendicular to the ring airway and connects the driving groove with the ring airway, the pneumatic slip ring is located on the outside of the pneumatic chamber and is fixedly connected to the whip rope, the surface of the whip rope is provided with evenly distributed granular protrusions, and a high-strength umbrella-shaped protective cover is provided on the upper part of each group of rotating drive components, and the umbrella-shaped protective cover is fixedly connected to the outside of the arc-shaped support tube.

[0016] Furthermore, the coal feeder includes a coal conveyor belt, a coal flow shaping device, a coal outage signal collection device and a PLC intelligent control box. The coal particles flowing out of the optimized curved coal hopper are transported to the boiler of the coal-fired power plant through the coal conveyor belt, the coal flow shaping device is used to sort the coal particles transported on the coal conveyor belt, and the coal outage signal collection device is used to monitor the coal particles transported on the coal conveyor belt. When the coal is out of coal on the coal conveyor belt, the monitored signal is transmitted to the PLC intelligent control box, and the clearing structure is controlled by the PLC intelligent control box to quickly clear the blockage.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] The optimized curved anti-blocking and clearing mechanism for the eccentric raw coal bunker of the present invention firstly improves the discharge smoothness of the raw coal bunker and effectively prevents the occurrence of blockage by optimizing the curved coal hopper design; secondly, the two-way pneumatic gate controls the flow of coal particles and adapts to different particle flow rates to prevent accumulation; furthermore, a coal feeder is provided to ensure that the coal particles completely enter the conveying system to reduce leakage; in addition, clearing structures such as arc-shaped support pipes and high-pressure nozzles use high-pressure gas to remove adhered coal powder, prevent arch blockage, and improve boiler operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall cross-sectional structure of this embodiment;

[0020] Figure 2 For this embodiment Figure 1 A schematic diagram of the structure at A;

[0021] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the arc-shaped support tube of this embodiment;

[0022] Figure 4 For this embodiment Figure 3 A schematic diagram of the enlarged structure at B;

[0023] Figure 5 This is a schematic diagram of the external structure of the blockage clearing structure of this embodiment;

[0024] Figure 6 This is a schematic diagram of the expanded structure of the rotary drive assembly of this embodiment. DETAILED DESCRIPTION

[0025] 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.

[0026] Embodiment 1:

[0027] See also Figure 1-6 , this embodiment provides a technical solution:

[0028] An optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker comprises an optimized curved coal hopper 1 and an eccentric raw coal bunker 2. The optimized curved coal hopper 1 is smoothly connected with an outlet 3 of the eccentric raw coal bunker 2, which is beneficial to the smooth discharge of the eccentric raw coal bunker 2 and prevents blockage.

[0029] A two-way pneumatic gate 4 is installed between the optimized curved coal hopper 1 and the eccentric raw coal bin 2. The two-way pneumatic gate 4 is used to control the circulation and interception of coal particles between the eccentric raw coal bin 2 and the optimized curved coal hopper 1. The flow rate of the coal particles is controlled by opening the two-way pneumatic gate 4, thereby adapting the flow rate of the coal particles inside the optimized curved coal hopper 1 to prevent the coal particles from accumulating inside the optimized curved coal hopper 1 and causing blockage.

[0030] A coal feeder 5 is provided at the lower end outlet of the optimized curved coal hopper 1. The outlet center of the optimized curved coal hopper 1 should be concentric with the inlet center line of the coal feeder 5, which is conducive to the coal particles in the eccentric raw coal bin 2 to completely enter the coal feeder 5 through the optimized curved coal hopper 1 for transportation and prevent leakage.

[0031] Further added clearing structure 12: A clearing structure 12 is arranged inside the optimized curved coal hopper 1, and the clearing structure 12 includes an arc-shaped support pipe 13, on which a high-pressure nozzle 19 is installed. The high-pressure nozzle removes adhered coal powder by high-pressure gas to prevent arch blockage and improve the operation stability of the boiler; the arc-shaped support pipe 13 is designed to extend along the center of the inner cavity of the optimized curved coal hopper 1, and has the same curvature as the central curve of the inner cavity of the optimized curved coal hopper 1. Both ends of the arc-shaped support pipe 13 extend to the outside of both ends of the optimized curved coal hopper 1, and for the installation of the arc-shaped support pipe 13, the upper end of the arc-shaped support pipe 13 passes through the eccentric raw coal bin 2 and extends to the outside thereof. Both ends of the arc-shaped support pipe 13 are fixedly connected to the outside with brackets, and the arc-shaped support pipe 13 is fixed by the brackets to ensure its stable shape. The arc-shaped support pipe 13 itself is made of rigid steel, and a corrosion-resistant and wear-resistant coating is provided on the surface to protect the arc-shaped support pipe 13 and effectively extend its service life.

[0032] In a specific example, the optimized curved coal hopper 1 is an eccentric cylinder similar to a bull's horn, and its top opening is wide, which is convenient for coal particles at the bottom of the eccentric raw coal bin 2 to enter and speed up the conveying speed; the bottom of the optimized curved coal hopper 1 is narrow, which is conducive to docking with the coal feeder 5, and the center line of the internal cavity of the optimized curved coal hopper 1 is offset from its geometric center. This design helps to optimize space utilization and material flow, and its cross-sectional shrinkage rate changes into a curve with a downward trend; the optimized curve technology of the optimized curved coal hopper 1 utilizes the principle of fluid particle discreteness and the steepest descent curve, based on the study of the flow state, elasticity, plasticity, viscosity, deformation level, sliding, expansion and fluidity changes of complex raw coal particles, and based on the analysis of the influence of moisture, viscosity and pressure on the fluidity of raw coal particles, through the verification of the corresponding relationship between the dynamic repose angle of coal flow and the external structure of the coal bin, and combined with the relevant parameters of the coal feeder 5, a computer is used to simulate the stress on the raw coal bin wall and the decomposition of flow dynamics, and the coal flow blockage is transformed into a predictable process, solving the problems of pressure dispersion at the stress point of the raw coal bin, effective power transmission and vibration force guidance.

[0033] In a specific example, the two plates of the two-way pneumatic gate 4 are symmetrically arranged on both sides of the arc-shaped support tube 13, and a slot adapted to the outer wall of the arc-shaped support tube 13 is provided at one end close to the arc-shaped support tube 13, thereby ensuring the closure of the two-way pneumatic gate 4, and the closure is tight to prevent leakage.

[0034] One end of the arc support pipe 13 close to the coal feeder 5 is sealed, and an air inlet is provided at the end away from the coal feeder 5. The air inlet of the arc support pipe 13 is connected to a high-pressure air pump through a pipeline, and high-pressure gas is transported to the inside of the arc support pipe 13 through the high-pressure air pump. A high-pressure nozzle 19 is installed on the side wall of the arc support pipe 13, which is inclined downward and faces the inner wall of the optimized curved coal hopper 1. The air inlet end of the high-pressure nozzle 19 is connected to the inside of the arc support pipe 13, and a solenoid valve 20 is installed inside the high-pressure nozzle 19, and the switch of the high-pressure nozzle 19 is controlled by the solenoid valve 20;

[0035] In a specific example, the outside of the high-pressure air pump is connected to an air heater, which can heat the air through a resistance wire or directly heat the air with infrared rays. It has high heating efficiency and is suitable for rapid heating occasions.

[0036] The air heater is pressurized by a high-pressure air pump and then transported to the arc support pipe 13. It is electrically connected to the solenoid valve 20 inside the high-pressure nozzle 19 through a control module, and is used to centrally control the opening and closing of the solenoid valve 20. By opening the solenoid valve 20, the high-temperature and high-pressure gas inside the arc support pipe 13 is sprayed toward the inner wall of the optimized curved coal hopper 1 through the high-pressure nozzle 19, thereby removing the coal particles adhering to the inner wall of the optimized curved coal hopper 1 under high pressure; the high-pressure gas has a strong impact force and directly acts on the wet and sticky coal powder, and has a better cleaning effect than manual knocking and vibrating air hammers acting from the outside, and the high-pressure nozzle 19 is tilted downward to blow the cleaned coal particles directly to the coal feeder 5, thereby accelerating the circulation speed of the coal particles and reducing the possibility of blockage.

[0037] There are several high-pressure nozzles 19, which are evenly distributed along the outside of the arc-shaped support tube 13, so that

[0038] Optimize the cleaning of various positions on the inner wall of the curved coal hopper 1 to prevent the problem of loose coal and coal blockage. Since the electromagnetic valve 20 inside the high-pressure nozzle 19 is controlled by the control module, all high-pressure nozzles 19 can be opened, and the coal adhesion and blockage positions can also be cleaned. It is flexible and targeted to use, improve work efficiency, and save energy.

[0039] In a specific example, since the above-mentioned cleaning structure is located at the center of the optimized curved coal hopper 1 and occupies a small space, and the coal particles flow along the inner wall of the optimized curved coal hopper 1, it will not affect the transportation of the coal particles, and the cleaning structure and coal transportation are carried out simultaneously. The high-temperature gas sprayed by the high-pressure nozzle 19 can pre-dry the flowing coal, which is beneficial to the dispersion of the coal particles, making the inner wall of the optimized curved coal hopper 1 dry and smooth, reducing the viscosity of the coal or coal powder and the inner wall of the optimized curved coal hopper 1, accelerating the flow, and avoiding accumulation and arching; thereby effectively preventing the coal particles from sticking to each other during the falling process, and preventing the influence of moisture or mixed coal slime on the transportation and circulation of coal. This is a cleaning effect that cannot be achieved by equipment such as manual knocking and air cannons.

[0040] The cleaning structure can work while coal is being transported, solving the problem that wet coal particles or coal slime mixed coal particles are prone to coal powder sticking to the wall, arching, and clogging, which seriously affects the stable operation of the boiler.

[0041] In a specific example, a rotating drive assembly 25 is installed between the high-pressure nozzle 19 and the arc-shaped support tube 13. The rotating drive assembly 25 drives the high-pressure nozzle 19 to rotate outside the arc-shaped support tube 13. The high-pressure nozzle 19 rotates around the circumference of the arc-shaped support tube 13 to rotate 360 ​​degrees to spray high-pressure gas on the inner wall of the optimized curved coal hopper 1, and applies high-pressure gas force at multiple angles to the coal powder and coal slime adhering to the inner wall of the optimized curved coal hopper 1, so that the coal powder and coal slime are easier to fall off, and the inner wall of the optimized curved coal hopper 1 is effectively cleaned.

[0042] The rotary drive assembly 25 includes an annular seat 26, which is fixedly connected to the outside of the arc-shaped support tube 13. One end of the annular seat 26 is fixedly connected to a pneumatic chamber 27, and a pneumatic slip ring 28 is rotatably connected inside the pneumatic chamber 27. A rotating groove is provided at one end of the pneumatic chamber 27, and one end of the pneumatic slip ring 28 passes through the rotating groove and extends to the outside of the pneumatic chamber 27. Slip ring sealing rings 29 are installed between the two sides of the pneumatic slip ring 28 and the rotating groove. The pneumatic slip ring 28 and the rotating groove are dynamically sealed by the slip ring sealing ring 29 to prevent the gas inside the pneumatic chamber 27 from leaking to the outside.

[0043] A driving groove is provided at one end of the pneumatic slip ring 28 located inside the pneumatic chamber 27. The driving groove is an annular groove. A plurality of pneumatic blades 30 are fixedly connected inside the annular groove. The plurality of pneumatic blades 30 are distributed in a circular array inside the annular groove.

[0044] A high-pressure air pipe 31 is sleeved inside the arc-shaped support tube 13. One end of the air pipe is sealed, and the other end is fixedly connected to the high-pressure air pump. A high-pressure hose 32 is fixedly connected between the pneumatic chamber 27 and the high-pressure air pipe 31. The air inlet end of the high-pressure hose 32 is fixedly connected to the high-pressure air pipe 31, and the air outlet end of the high-pressure hose 32 enters the pneumatic chamber 27 tangentially. The high-pressure gas delivered by the high-pressure air pump passes through the high-pressure air pipe 31 and the high-pressure hose 32 and enters the pneumatic chamber 27 tangentially, thereby blowing the pneumatic blades 30 distributed in a circumferential array, and the pneumatic slip ring 28 is driven to rotate around the annular seat 26 through the pneumatic blades 30.

[0045] The pneumatic slip ring 28 is located at one end outside the pneumatic chamber 27 and a high-pressure nozzle 19 is installed on the outside. An annular airway and a straight airway are provided inside the pneumatic slip ring 28. The annular airway is annular and coaxial with the pneumatic slip ring 28. The straight airway is perpendicular to the annular airway and connects the drive groove with the annular airway. The number of straight airways is the same as that of pneumatic blades 30. The high-temperature and high-pressure gas that enters the pneumatic chamber 27 and blows the pneumatic blades 30 to rotate enters the annular airway from the straight airway, and then enters the high-pressure nozzle 19 through the annular airway, and is sprayed at high speed toward the inner wall of the optimized curved coal hopper 1 through the high-pressure nozzle 19, thereby realizing that the rotary drive assembly 25 drives the high-pressure nozzle 19 to rotate and spray high-temperature and high-pressure gas to clean the inner wall of the optimized curved coal hopper 1.

[0046] In a specific example, a plurality of rotary drive components 25 are provided according to the length of the optimized curved coal hopper 1, so as to clean different height positions inside the optimized curved coal hopper 1, so that the cleaning area is larger and the effect is stronger.

[0047] In a specific example, in order to ensure effective cleaning of coal powder adhered to the inner wall of the optimized curved coal hopper 1, a pneumatic slip ring 28 is located at one end outside the pneumatic chamber 27 and is fixedly connected to a whip rope 33. The surface of the whip rope 33 is provided with evenly distributed particle protrusions. The pneumatic slip ring 28 drives the whip rope 33 to rotate. When the whip rope 33 rotates, it rotates and contacts with the inner wall of the optimized curved coal hopper 1 under the action of centrifugal force. The whip rope 33 is evenly distributed with particle protrusions, which increase the friction between the whip rope 33 and the adhered coal powder, thereby scraping it off. The advantage of the whip rope 33 using centrifugal force to rotate and contact with the inner wall of the optimized curved coal hopper 1 is that it can directly contact the adhered coal powder or coal particles, which is equivalent to cleaning with a brush, and the rotation of the whip rope 33 is not limited by the diameter of the inner wall of the optimized curved coal hopper 1, so it can be suitable for the curved surface with changing diameter inside the optimized curved coal hopper 1.

[0048] In order to avoid the influence of coal particles on the rotating drive assembly 25 and the high-pressure nozzle 19, a high-strength umbrella-shaped protective cover 35 is arranged on the upper part of each group of rotating drive assemblies 25. The umbrella-shaped protective cover 35 prevents the coal particles from colliding with the rotating drive assembly 25 and the high-pressure nozzle 19, thereby ensuring the stable operation of the rotating drive assembly 25 and the high-pressure nozzle 19, and is beneficial to the high-temperature and high-pressure gas sprayed by the high-pressure nozzle 19 to remove moisture from the coal particles and prevent adhesion; and the umbrella-shaped protective cover 35 is umbrella-shaped and has a smooth outer surface, which is beneficial to the coal particles falling on the umbrella-shaped protective cover 35 to slide down and disperse them.

[0049] The coal feeder 5 includes a coal conveyor belt 36, a coal flow shaping device 37, a coal shortage signal collection device 38, and a PLC intelligent control box 39. The coal particles flowing out of the optimized curved coal hopper 1 are transported to the boiler of the coal-fired power plant through the coal conveyor belt 36. The coal particles transported on the coal conveyor belt 36 are sorted by the coal flow shaping device 37, which is conducive to uniform transportation and prevents local accumulation. The coal shortage signal collection device 38 monitors the coal particles transported on the coal conveyor belt 36. When the coal is shortage on the coal conveyor belt 36, the monitored signal is transmitted to the PLC intelligent control box 39, and the clearing structure 12 is controlled by the PLC intelligent control box 39 to quickly clear the blockage. At the same time, an early warning signal is issued to call the staff to check and handle it.

[0050] In summary, the optimized curved anti-blocking and clearing mechanism for the eccentric raw coal bunker of this embodiment first improves the discharge smoothness of the raw coal bunker and effectively prevents the occurrence of blockage by optimizing the design of the curved coal hopper; secondly, the two-way pneumatic gate controls the flow of coal particles, adapts to the flow speed of different particles, and prevents accumulation; thirdly, a coal feeder is provided to ensure that the coal particles completely enter the conveying system to reduce leakage; in addition, clearing structures such as arc-shaped support pipes and high-pressure nozzles use high-pressure gas to remove adhered coal powder, prevent arch blockage, and improve boiler operation stability; finally, the rotary drive assembly enables the high-pressure nozzle to rotate and spray, and the cleaning effect is better. At the same time, the PLC intelligent control box realizes automatic monitoring and rapid clearing, which improves work efficiency and safety. Specifically, the clearing structure is arranged inside the optimized curved coal hopper, including an arc-shaped support pipe and a high-pressure nozzle. The high-pressure nozzle is controlled by a solenoid valve. Under the action of a high-pressure air pump, high-temperature and high-pressure gas is ejected, which directly acts on the coal particles on the inner wall of the optimized curved coal hopper, effectively removing the coal adhering to the wall, preventing the accumulation and blockage of coal particles, and the high-pressure nozzles are evenly distributed outside the arc-shaped support tube, which can clean various positions of the inner wall of the optimized curved coal hopper and improve the cleaning efficiency. In addition, the high-pressure nozzle sprays downward at an angle, blowing the cleaned coal particles directly to the coal feeder, accelerating the circulation speed of the coal particles and reducing the possibility of blockage. Furthermore, the rotary drive assembly causes the high-pressure nozzle to rotate around the circumference of the arc-shaped support tube, rotating and spraying the inner wall of the optimized curved coal hopper 360 degrees, applying high-pressure air force at multiple angles, making it easier for the coal powder and coal slime adhering to the inner wall of the optimized curved coal hopper to fall off, thereby improving the cleaning effect. In addition, the rotary drive assembly sets multiple groups according to the length of the optimized curved coal hopper, cleaning different height positions inside the optimized curved coal hopper, expanding the cleaning area, and enhancing the cleaning effect. At the same time, the particle protrusions on the whip rope increase the friction with the bonded coal powder and scrape it off. Finally, the clearing mechanism is combined with the PLC intelligent control box to achieve automatic monitoring and cleaning. When coal is broken on the coal conveyor belt, the system automatically sends out an early warning signal and controls the clearing mechanism to quickly clean up, ensuring the continuity and stability of coal transportation.

[0051] The working principle of this embodiment;

[0052] First, the optimized curved coal hopper 1 is designed to be an eccentric cylinder similar to a bull's horn, with a wide top opening and a narrow bottom. The center line of the bottom is offset from the geometric center to form a downward-trending curved cross section. The material flow path is optimized by using the principle of fluid particle dispersion and the steepest descent curve to reduce the possibility of accumulation and blockage. The interior of the optimized curved coal hopper 1 is concentric with the inlet of the coal feeder 5 to ensure that coal particles enter the coal feeder 5 smoothly and reduce leakage.

[0053] Secondly, the bidirectional pneumatic gate 4 controls the flow and stop of coal particles, and controls the flow rate of coal particles by adjusting the opening and closing of the gate, adapting to the flow rate of coal particles in the optimized curved coal hopper 1 to prevent accumulation. At the same time, the coal feeder 5 at the lower end outlet of the optimized curved coal hopper 1 is concentric with the outlet center of the optimized curved coal hopper 1, ensuring that the coal particles are fully transported by the coal feeder 5, further reducing leakage.

[0054] Finally, the clearing structure 12 works in coordination with the arc support tube 13 and the high-pressure nozzle 19. The arc support tube 13 is fixed to the inner cavity of the optimized curved coal hopper 1 to provide support and guide the flow of coal. The high-pressure nozzle 19 sprays high-temperature and high-pressure gas on the side wall of the arc support tube 13 to remove coal particles adhered to the inner wall of the optimized curved coal hopper 1 to prevent coal blockage. In addition, the rotary drive assembly 25 causes the high-pressure nozzle 19 to rotate and spray, cleaning the inner wall of the optimized curved coal hopper 1 at multiple angles to improve the cleaning effect. The entire system is monitored and adjusted by the PLC intelligent control box 39 to ensure smooth coal transportation and prevent boiler operation from being affected.

[0055] Although specific embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the specific embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker, characterized in that: The invention comprises an optimized curved coal hopper (1) and an eccentric raw coal bin (2); the optimized curved coal hopper (1) is smoothly connected to the bin outlet (3) of the eccentric raw coal bin (2); a two-way pneumatic gate (4) for the circulation and interception of coal particles is installed between the optimized curved coal hopper (1) and the eccentric raw coal bin (2); a coal feeder (5) is arranged at the lower outlet of the optimized curved coal hopper (1); the outlet center of the optimized curved coal hopper (1) is concentric with the inlet center line of the coal feeder (5); a clearing structure (12) is arranged inside the optimized curved coal hopper (1); the clearing structure (12) comprises an arc-shaped support pipe (13); and a high-pressure nozzle (19) is installed on the arc-shaped support pipe (13).

2. The optimized curved anti-blocking and clearing mechanism for the eccentric raw coal bunker according to claim 1 is characterized by: The optimized curved coal hopper (1) is eccentrically cylindrical and similar to a bull's horn, with a wide opening at the top, which is fixedly connected to the bottom of the raw coal bin; the bottom of the optimized curved coal hopper (1) is narrow and is used to connect with the inlet of the coal feeder (5), and the center line of the internal cavity of the optimized curved coal hopper (1) is offset from its geometric center.

3. The optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker according to claim 1 is characterized by: The arc-shaped support tube (13) is designed to extend along the center of the inner cavity of the optimized curved coal hopper (1) and has the same curvature as the central curve of the inner cavity of the optimized curved coal hopper (1). Both ends of the arc-shaped support tube (13) extend to the outside of both ends of the optimized curved coal hopper (1). The upper end of the arc-shaped support tube (13) passes through the eccentric raw coal bin (2) and extends to the outside thereof. Both ends of the arc-shaped support tube (13) are fixedly connected to the outside with brackets.

4. The optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker according to claim 3 is characterized by: The two flaps of the bidirectional pneumatic flap door (4) are symmetrically arranged on both sides of the arc-shaped support tube (13), and a slot matching the outer wall of the arc-shaped support tube (13) is provided at one end close to the arc-shaped support tube (13).

5. The optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker according to claim 4 is characterized in that: The arc-shaped support pipe (13) is sealed at one end close to the coal feeder (5), and is provided with an air inlet at the end away from the coal feeder (5). The air inlet of the arc-shaped support pipe (13) is connected to a high-pressure air pump through a pipeline, and high-pressure gas is transported to the inside of the arc-shaped support pipe (13) through the high-pressure air pump. A high-pressure nozzle (19) is installed on the side wall of the arc-shaped support pipe (13) and is inclined downward toward the inner wall of the optimized curved coal hopper (1). The air inlet end of the high-pressure nozzle (19) is connected to the inside of the arc-shaped support pipe (13), and a solenoid valve (20) is installed inside the high-pressure nozzle (19).

6. The optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker according to claim 5, characterized in that: The outside of the high-pressure air pump is connected to an air heater, and the air heater heats the air through a resistance wire or directly heats the air through infrared rays. A plurality of high-pressure nozzles (19) are provided and are evenly distributed along the outside of the arc-shaped support tube (13).

7. The optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker according to claim 6 is characterized by: A rotation drive assembly (25) is installed between the high-pressure spray head (19) and the arc-shaped support tube (13), and the rotation drive assembly (25) drives the high-pressure spray head (19) to rotate outside the arc-shaped support tube (13).

8. The optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker according to claim 7, characterized in that: The rotary drive assembly (25) comprises an annular seat (26), the annular seat (26) is fixedly connected to the outside of the arc-shaped support tube (13), one end of the annular seat (26) is fixedly connected to a pneumatic chamber (27), a pneumatic slip ring (28) is rotatably connected inside the pneumatic chamber (27), one end of the pneumatic chamber (27) is provided with a rotary groove, one end of the pneumatic slip ring (28) passes through the rotary groove and extends to the outside of the pneumatic chamber (27), slip ring sealing rings (29) are installed between the two sides of the pneumatic slip ring (28) and the rotary groove, and a driving groove is opened at one end of the pneumatic slip ring (28) located inside the pneumatic chamber (27), the driving groove is an annular groove, a plurality of pneumatic blades (30) are fixedly connected inside the annular groove, and the plurality of pneumatic blades (30) are distributed in a circular array inside the annular groove.

9. The optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker according to claim 8, characterized in that: The arc-shaped support tube (13) is sleeved with a high-pressure air guide tube (31) at one end, the air guide tube is sealed, and the other end is fixedly connected to a high-pressure air pump. A high-pressure hose (32) is fixedly connected between the pneumatic chamber (27) and the high-pressure air guide tube (31). The air inlet end of the high-pressure hose (32) is fixedly connected to the high-pressure air guide tube (31), and the air outlet end of the high-pressure hose (32) enters the pneumatic chamber (27) tangentially. A high-pressure nozzle (19) is installed on the outside of one end of the pneumatic slip ring (28) located outside the pneumatic chamber (27). The pneumatic slip ring (28) is provided with a high-pressure nozzle (19) at one end thereof. 8) A ring airway and a straight airway are provided inside. The ring airway is ring-shaped and coaxial with the pneumatic slip ring (28). The straight airway is perpendicular to the ring airway and connects the drive groove with the ring airway. The pneumatic slip ring (28) is located outside the pneumatic chamber (27) and is fixedly connected to the whip rope (33) at one end. The surface of the whip rope (33) is provided with evenly distributed particle protrusions. A high-strength umbrella-shaped protective cover (35) is provided on the upper part of each group of rotating drive components (25). The umbrella-shaped protective cover (35) is fixedly connected to the outside of the arc-shaped support tube (13).

10. The optimized curved anti-blocking and clearing mechanism for an eccentric raw coal bunker according to claim 1, characterized in that: The coal feeder (5) comprises a coal conveyor belt (36), a coal flow shaping device (37), a coal outage signal collection device (38) and a PLC intelligent control box (39). The coal conveyor belt (36) is used to convey coal particles flowing out of the optimized curved coal hopper (1) to the boiler of the coal-fired power plant. The coal flow shaping device (37) is used to sort the coal particles conveyed on the coal conveyor belt (36). The coal outage signal collection device (38) is used to monitor the coal particles conveyed on the coal conveyor belt (36). When the coal is out of the coal conveyor belt (36), the monitored signal is transmitted to the PLC intelligent control box (39), and the PLC intelligent control box (39) is used to control the clearing structure (12) to quickly clear the blockage.

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