Coal anti-blocking falling pipe device for coal storage euro bin

Abstract

The present application relates to a kind of anti-blocking coal drop pipe devices for coal storage euro bin, including sequentially connected central telescopic drop pipe, anti-blocking coal drop pipe and drop pipe mounting seat, wherein the first section of the central telescopic drop pipe pipe is the middle part of small upper and large lower cone pipe structure, the first section of pipe is connected with the upper end of anti-blocking coal drop pipe, dust return plate is arranged in anti-blocking coal drop pipe, for guiding the dust-containing gas generated by coal drop point below along pipe wall upwards to below, to avoid dust-containing gas along cylinder wall upwards to the gap between the pipe wall of central telescopic drop pipe, exhaust port is opened on anti-blocking coal drop pipe, for discharging dust-containing gas inside to the outside of anti-blocking coal drop pipe.Compared with prior art, the present application can effectively reduce the blocking and coal blocking phenomenon of central telescopic drop pipe, avoid the damage of euro bin equipment, improve the adaptability of euro bin to sticky coal, improve the stability of euro bin coal storage operation.

Description

Technical Field

[0001] This invention relates to the field of thermal power plant equipment technology, and in particular to an anti-blocking coal feeding pipe device for coal storage bins. Background Technology

[0002] Euro-type coal storage is the latest environmentally friendly coal storage method. Currently, domestic thermal power plants have introduced Euro-type coal storage technology for coal storage. However, some problems have also arisen when using Euro-type coal storage, which directly affect the safe and stable operation of Euro-type coal storage.

[0003] Inside the Euro warehouse, there is a lot of equipment. This equipment is mainly used to stack and store the coal entering the Euro warehouse from low to high and to take out the coal from high to low, as well as to output the coal from the warehouse.

[0004] like Figure 1 As shown, the existing coal storage bin mainly consists of the bin cylinder wall 1, bin inlet 2, bin roof bridge 3, rotary bridge 4, rotary bridge traveling device 5, central telescopic drop pipe 6, spiral frame lifting wire rope 7, spiral frame 8, spiral conveyor 9, guide chute 10, spiral frame A-frame 11, central hoisting platform 12, central rotary platform 13, and spiral frame central platform 14. The upper end of the central telescopic drop pipe 6 is connected to the bin inlet 2, and the lower end is connected to the guide chute 10 on the spiral frame central platform 14. The central telescopic drop pipe 6 is the feeding channel of the bin. The central telescopic drop pipe 6 extends and shortens as the spiral frame central platform 14 rises and falls. Coal enters the guide chute 10 through the central telescopic drop pipe 6 and is then fed into the bin from the coal outlet 16.

[0005] like Figure 2 As shown, the central telescopic discharge tube 6 is composed of several nested round tubes of different diameters. Taking five round tubes as an example, the central telescopic discharge tube 6 is composed of the first round tube 6-1, the first round tube foot flange 6-1-1, the guide rod hole 6-1-2, the buffer fixing bolt hole 6-1-3, the reinforcing rib 6-1-4, the limit retaining ring 6-1-5, the second round tube 6-2, the third round tube 6-3, the fourth round tube 6-4, and the fifth round tube 6-5.

[0006] like Figures 3-5As shown, the central telescopic discharge pipe 6 is connected to the guide trough 10. The structure at the connection mainly consists of the first section of round pipe foot flange 6-1-1, guide trough 10, spiral frame central platform 14, coal discharge outlet 16, grating plate 16-1, discharge pipe mounting seat 17, mounting interface 17-1, fixed support frame 17-2, rubber buffer 18, guide rod 19, buffer fixing bolt hole 17-1, etc. The first section of round pipe 6-1 foot flange 6-1 on the central telescopic discharge pipe 6 is connected to the mounting interface 17-1 on the discharge pipe mounting seat 17 through the rubber buffer 18. The rubber buffer 18 plays a buffering role. The guide rod 19 is used to ensure that there is an appropriate amount of movement between the first section of round pipe 6-1 on the central telescopic discharge pipe 6 and the discharge pipe mounting seat 17 to reduce the impact force, and to ensure that the movement is only along the axial direction of the guide rod 19 without deflection.

[0007] The lower outlet of the central telescopic discharge pipe 6 is directly opposite the coal discharge port 16, the grating plate 16-1, and the discharge area plane (coal accumulation area) 14-1 on the central platform 14 of the spiral frame. This plane is also the area where coal accumulates when the Euro warehouse is fed. The accumulated coal cannot be discharged by itself. The accumulated coal will accumulate more and more, and may even touch the lower port of the central telescopic discharge pipe. As a result, the coal will affect the normal telescopic movement of the telescopic discharge pipe.

[0008] Therefore, the equipment arranged inside the Euro warehouse mainly consists of a rotary trestle, a hoisting and lifting device, a trestle traveling mechanism, a central rotary platform, a central telescopic discharge pipe, a spiral frame, and a spiral stacking device. The Euro warehouse has a coal conveying trestle at the top, with a belt conveyor inside. Coal is transported by the conveyor to the inlet of the central telescopic discharge pipe at the top of the Euro warehouse, and then enters the Euro warehouse through the upper port of the central telescopic discharge pipe installed on the central rotary platform. The coal then reaches the spiral frame at the lower outlet via the central telescopic discharge pipe. The spiral frame is equipped with a device for stacking coal within the warehouse, namely a spiral conveyor. The spiral conveyor can rotate in both forward and reverse directions, thereby realizing the stacking and removal of coal within the warehouse.

[0009] The screw conveyor rotates forward, pushing the coal flowing from the bottom of the central telescopic discharge pipe outward along the radius of the cylindrical body of the Euro bin towards the circumference, until the coal is pushed to the bin wall. The screw frame and the rotary bridge rotate horizontally around the central axis of the Euro bin in sync, so that the screw conveyor can evenly pile the incoming coal in the bin. When the coal is being discharged from the Euro bin, the screw conveyor rotates in the opposite direction relative to the pile, gathering the coal on the surface of the pile towards the center, and the coal is output through the activated feeder.

[0010] When coal is being piled up in the silo, the spiral frame always maintains a fixed distance (30cm~50cm) from the top surface of the coal inside the silo. When unloading, the spiral conveyor must be in contact with the top surface of the coal pile inside the silo.

[0011] When coal enters the Euro warehouse from outside, it passes through the central telescopic chutes. The upper end of the central telescopic chutes connects to the coal chutes outlet on the central platform, and the lower end connects to the receiving point on the spiral frame. Therefore, coal entering the warehouse must pass through the central telescopic chutes. During coal stacking, the length of the central telescopic chutes continuously shortens as the spiral frame rises. During coal removal from the warehouse, the length of the central telescopic chutes continuously lengthens as the spiral frame descends. The function of the central telescopic chutes is to prevent the coal entering the warehouse from scattering and spilling during its descent. The falling coal always lands on the receiving point on the spiral frame, preventing the coal from directly impacting the coal pile. At the same time, it reduces coal dust and ensures the safety of coal entering and stacking in the warehouse.

[0012] The central telescopic discharge tube is composed of several concentric nested sections of circular tubes of different diameters. Each section is of the same length, and from top to bottom, the diameter of each section increases sequentially from the first to the last. This allows the previous section to be inserted into the next section, and so on, until all the sections are inserted into the last section, which is the so-called conveying state. Each section has steps of different diameters at both ends as sliding limit connectors, which allow adjacent sections to slide against each other while still being hooked together and unable to be separated. They can also slide relative to each other along the central axis of the tube. This structure connects several discharge tube sections on a central axis, and they expand or contract sequentially as the distance between the two ends lengthens or shortens. This structural feature allows the distance between the inlet and outlet of the central telescopic discharge tube to change with the distance between the rotary bridge and the spiral frame, thus ensuring that the material always passes through the telescopic discharge tube. When the spiral frame is in its highest position, the central telescopic discharge pipe retracts to its shortest distance. Since the central discharge pipe is vertical, each section of the pipe overlaps the next under gravity. As the spiral frame descends, it extends section by section, starting from the topmost section, until the penultimate section is fully extended. At this point, the spiral frame is at the bottom of the storage bin, and all coal has been emptied. When coal is added to the bin, the spiral frame gradually rises, and the fully extended central telescopic discharge pipe begins to retract. During this retraction... The second-to-last section of the bottom circular tube is inserted into the last section of the bottom circular tube. When fully inserted, the second-to-last section of the bottom circular tube is stationary relative to the last section of the bottom circular tube. As the spiral frame continues to rise, the third-to-last section of the bottom circular tube begins to insert into the second-to-last section of the bottom circular tube. In this way, as the spiral frame rises, the central telescopic discharge tube retracts into the lower section of the circular tube. When the spiral frame rises to its highest point, the central telescopic discharge tube retracts completely into the lowest section of the circular tube. The extension and retraction of the central telescopic discharge tube is always consistent with the rising and falling motion of the spiral frame.

[0013] However, in practical applications, the coal used for power generation in China is currently mainly lignite, which has a high proportion of fine particles, high volatile matter and moisture content, and high viscosity. Because of its relatively low price, this type of coal can effectively reduce power generation costs and improve economic efficiency. Therefore, its use is a trend in the power generation industry. When such coal is stored in a Euro warehouse, as the coal enters the warehouse through the central feed pipe, the falling coal will generate a large impact at the bottom landing point. Under the action of the impact force, small coal particles are ejected in all directions, while simultaneously compressing the surrounding air to form a large airflow. The airflow carrying small coal particles diffuses into areas of relatively low pressure. Upon reaching the wall of the central telescopic discharge pipe, the air rises upwards, causing it to enter the space between the overlapping sections of the discharge pipe. Due to the high moisture content of coal, these coal particles easily adhere to the pipe wall after mixing with the moisture. As more and more coal adheres to the pipe wall, it inevitably hinders the relative sliding movement of each discharge pipe section during extension and retraction, even causing jamming, i.e., complete inability to slide. In severe cases, the adhered coal causes multiple discharge pipe sections to stick together as a single unit. When the extension and retraction of the central telescopic discharge pipe cannot be synchronized with the upward and downward changes of the spiral frame, it will cause damage to the central telescopic discharge pipe. Repairing damage to the central telescopic discharge pipe is difficult and time-consuming, which will seriously affect the normal coal feeding and discharging operations of the Euro coal storage equipment, hindering the normal operation of the Euro coal storage facility.

[0014] Because the central telescopic discharge pipe of the Euro warehouse adopts a nested structure, when the spiral frame is not at the lowest position in the warehouse, several telescopic discharge pipes will always be nested and overlapped together, that is, not extended. At this time, the lower end of the discharge pipe is very close to the discharge point. During the discharge, some coal dust will inevitably spread upward along the pipe wall with the airflow. This will cause coal to accumulate between the walls of the nested and overlapping discharge pipes. When the amount of coal accumulated reaches a certain level, it will form adhesion between the telescopic discharge pipes. This situation is caused by the fact that the distance between the existing central telescopic discharge pipe of the Euro warehouse and the discharge point is too close.

[0015] The bottom of the central telescopic discharge pipe is directly opposite the discharge point at the center of the spiral frame. The central discharge pipe has a circular structure, which gives it a cylindrical shape when the coal is falling. However, the discharge point area uses a triangular discharge zone. A grid is used on the triangular discharge zone to reduce the impact of the coal. The outside of the triangle is a flat surface. This feature makes it easy for coal to accumulate outside the triangular discharge zone. When the coal accumulates to a certain height, it will touch the bottom of the telescopic discharge pipe. When the coal is highly viscous, the coal that enters the gaps between the sections of the discharge pipe will cause adhesion between the central telescopic discharge pipe sections, resulting in a jamming phenomenon.

[0016] Due to the nested structure of the central telescopic discharge pipe, it is difficult to install a coal blockage detection sensor on the existing discharge pipe. Once encountering highly viscous coal, the coal at the discharge port cannot flow out quickly, and it will accumulate at the bottom discharge point inside the discharge pipe, resulting in coal blockage. This will block the coal from entering the bin. This accumulated coal will continue to accumulate to the feed port at the top of the bin. At this point, the central telescopic discharge pipe is full of coal, causing a surge in the weight acting on the spiral frame, endangering the safe operation of the bin and easily leading to a major equipment accident.

[0017] The area at the receiving point of the central telescopic discharge pipe in the Euro warehouse has a planar feature, making it prone to coal accumulation when encountering highly viscous coal. This reduces the discharge flow rate and can even cause coal blockage, interrupting the coal conveying operation. Because the central telescopic discharge pipe uses a nested structure, it is impossible to directly access the blocked area when blockage occurs, making manual cleaning difficult.

[0018] The aforementioned problems are frequent malfunctions in existing coal storage bins when encountering highly viscous coal. These malfunctions are precisely due to the fact that the existing structure cannot adapt to highly viscous coal. Summary of the Invention

[0019] The purpose of this invention is to overcome the defects of the prior art by providing an anti-blocking coal feeding pipe device for coal storage bins. This device can effectively reduce the jamming and coal blockage of the central telescopic feeding pipe, prevent damage to the bin equipment, improve the bin's adaptability to sticky coal, and enhance the stability of the bin's coal storage operation.

[0020] The objective of this invention can be achieved through the following technical solution: A coal storage silo anti-blocking coal discharge pipe device, comprising a central telescopic discharge pipe, an anti-blocking coal discharge pipe, and a discharge pipe mounting base connected in sequence. The central telescopic discharge pipe has a tapered structure with a smaller upper section and a larger lower section in the middle. The first section of the central telescopic discharge pipe is connected to the upper end of the anti-blocking coal discharge pipe. A dust return plate is provided inside the anti-blocking coal discharge pipe to guide the dust-laden gas generated at the coal drop point below, which travels upward along the pipe wall, downward, preventing the dust-laden gas from traveling upward along the cylinder wall into the gap between the circular pipe walls of the central telescopic discharge pipe. An exhaust port is provided on the anti-blocking coal discharge pipe to discharge the internal dust-laden gas to the outside of the anti-blocking coal discharge pipe.

[0021] Furthermore, the anti-blocking coal discharge pipe includes a flange interface, a straight section of the discharge pipe, a sloped section of the discharge pipe, and a triangular straight section of the discharge pipe connected in sequence. The flange interface is connected to the lower end of the first section of the circular pipe. The dust return plate is set at the connection position between the straight section of the discharge pipe and the flange interface. The exhaust port is opened on the upper end pipe wall of the straight section of the discharge pipe.

[0022] Furthermore, a gas collection ring for collecting dust-laden gas is provided around the exhaust port. The gas collection ring is connected to a gas guide pipe, which is used to guide the collected dust-laden gas to the coal accumulation area below.

[0023] Furthermore, a dust removal device or exhaust fan is installed at the outlet of the air duct to accelerate the removal of dust-laden gas.

[0024] Furthermore, a blockage sensor mounting base is provided at the lower end of the straight section of the discharge pipe for installing and connecting a blockage sensor. The blockage sensor is used to detect the coal accumulation state inside the discharge pipe device. A sensor cover is provided on the blockage sensor mounting base to protect the blockage sensor from being damaged by falling coal impacts.

[0025] Furthermore, an inspection door that can be opened and closed is provided on the wall of the inclined section of the material discharge pipe to facilitate user inspection and maintenance.

[0026] Furthermore, the lower end of the inclined section of the material drop tube is provided with a horizontal reinforcing rib and a fixed mounting surface, and the fixed mounting surface is connected to the material drop tube mounting seat through a rubber buffer and a guide rod.

[0027] Furthermore, the upper end of the triangular straight section material pipe is provided with an arc baffle to form a triangular prism-shaped material drop pipe. The two lower sides of the triangular straight section material pipe directly connect with the two sides of the triangle on the plane of the material drop area of ​​the coal drop outlet. Two sealing plates are arranged on both sides of the material drop outlet on the plane of the material drop area. The sealing plates and the triangular straight section material pipe separate the plane of the material drop area and the coal drop outlet in the guide chute, ensuring that all the falling coal is concentrated on the triangular inlet before being output, so as to avoid the accumulation of falling coal on the plane of the material drop area.

[0028] Furthermore, the upper end of the first section of the circular pipe is a sealing ring, which is used to seal the gap between the first section of the circular pipe and the second section of the circular pipe at the upper end of the first section of the circular pipe, and to ensure that the second section of the circular pipe slides up and down relative to the first section of the circular pipe. The lower end of the first section of the circular pipe is a flange interface, which is used to connect and fix it to the flange interface of the anti-blocking coal discharge pipe.

[0029] Furthermore, the sealing ring is made of rubber or polyurethane material.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] This invention incorporates a connecting anti-blocking coal discharge pipe between the central telescopic discharge pipe and the discharge pipe mounting base. The first section of the central telescopic discharge pipe is designed as a tapered structure, wider at the bottom and narrower at the top, to increase the space between it and the second section, preventing coal from adhering to the second section. The first section is connected to the upper end of the anti-blocking coal discharge pipe. This anti-blocking coal discharge pipe contains a dust return plate and an exhaust port. The dust return plate guides the dust-laden gas generated at the coal drop point downwards, preventing it from rising along the cylinder wall and entering the gaps between the central telescopic discharge pipe's circular walls. The exhaust port discharges the internal dust-laden gas to the outside of the anti-blocking coal discharge pipe. This effectively reduces jamming and coal blockage in the central telescopic discharge pipe, preventing damage to the coal storage bin, improving the bin's adaptability to sticky coal, and significantly enhancing the stability of coal storage operations.

[0032] This invention designs an anti-blocking coal feeding pipe comprising a flange interface, a straight section of the feeding pipe, a sloped section of the feeding pipe, and a triangular straight section of the feeding pipe connected in sequence. The flange interface is connected to the lower end of the first section of the circular pipe. A blockage sensor is installed at the lower end of the straight section of the feeding pipe via a blockage sensor mounting base. An exhaust port is opened on the upper end wall of the straight section of the feeding pipe. An inspection door that can be opened and closed is also opened on the wall of the sloped section of the feeding pipe. This achieves the purpose of detecting coal blockage and venting dusty gas, preventing the large accumulation of coal inside the feeding pipe due to blockage and thus avoiding damage to the Eurosilo equipment.

[0033] This invention features an annular gas collection ring and a gas guide pipe outside the exhaust port. This ring collects the dust-laden gas discharged from the exhaust port and guides it to the coal accumulation area below through the gas guide pipe. Furthermore, a dust removal device or an exhaust fan can be installed at the outlet of the gas guide pipe to purify the dust-laden gas and accelerate its discharge. This effectively prevents the dust-laden gas from rising along the pipe wall in the central telescopic discharge pipe and entering the gaps between the pipe walls, reducing coal adhering to the pipe wall and improving the reliability of the sliding motion between the circular pipes of the central telescopic discharge pipe.

[0034] This invention employs a circular pipe wall at the upper part of the anti-blocking coal discharge pipe, i.e., a straight section of the discharge pipe, and a sloped section at the lower part. The sloped section is designed to be the same size as the triangular inlet of the coal outlet at the discharge point. The lower part uses a triangular straight section of the discharge pipe and an arc baffle to form a triangular prism-shaped discharge pipe. The two lower sides of this discharge pipe directly connect with the two sides of the triangle at the coal outlet on the plane of the discharge area. Two sealing plates are arranged on both sides of the discharge outlet on the plane of the discharge area. In this way, the sealing plates and the triangular straight section of the discharge pipe separate the plane of the discharge area and the coal outlet within the guide chute, ensuring the smooth flow of the falling coal. All coal is concentrated at the triangular inlet before being discharged, preventing it from accumulating on the surface of the discharge area. Coal entering the bottom discharge area from the central telescopic discharge pipe of the Euro bin will not accumulate on the surface but will fall directly onto the coal discharge outlet, from which it enters the Euro bin. Because the inclined section of the discharge pipe, the triangular straight section of the discharge pipe, and the arc-shaped baffle have smooth surfaces, and there is an angle between the inclined surface and the horizontal plane, highly viscous coal cannot accumulate in the bottom guide chute of the central telescopic discharge pipe of the Euro bin, thus improving the Euro bin's ability to handle viscous coal. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the Euro warehouse;

[0036] Figure 2 A schematic diagram of the existing central telescopic discharge tube structure;

[0037] Figure 3 This is a schematic diagram of the material guide trough structure;

[0038] Figure 4 A schematic diagram showing the connection between the existing central telescopic discharge pipe and the discharge point;

[0039] Figure 5 A schematic cross-sectional view of the connection between the existing central telescopic discharge pipe and the discharge point;

[0040] Figure 6 This is a schematic diagram of the installation of the present invention;

[0041] Figure 7 for Figure 6 A cross-sectional schematic diagram;

[0042] Figure 8 This is a schematic diagram of the anti-blocking coal feeding pipe in this invention;

[0043] Figure 9 This is a schematic diagram of the central telescopic discharge tube in this invention;

[0044] Figure 10 This is a schematic diagram showing the connection between the gas accumulation ring and the air guide pipe in this invention;

[0045] Figure 11 This is a schematic diagram of the assembly of the anti-blocking coal feeding pipe in this invention;

[0046] Explanation of markings in the diagram:

[0047] Figure 1 The components are: 1. Euro silo cylinder wall, 2. Euro silo feed inlet, 3. Euro silo top trestle, 4. Rotary trestle, 5. Rotary trestle traveling device, 6. Central telescopic discharge pipe, 7. Spiral frame lifting wire rope, 8. Spiral frame, 9. Spiral conveyor, 10. Guide chute, 11. Spiral frame A-frame, 12. Central winch platform, 13. Central rotary platform, 14. Spiral frame central platform.

[0048] Figure 2 In the middle section: 6-1, first section of round pipe; 6-1-1, first section of round pipe anchor flange; 6-1-2, guide rod hole; 6-1-3, buffer fixing bolt hole; 6-1-4, reinforcing rib; 6-1-5, limit retaining ring; 6-2, second section of round pipe; 6-3, third section of round pipe; 6-4, fourth section of round pipe; 6-5, fifth section of round pipe;

[0049] Figure 3 In the middle: 10, guide chute; 17, drop pipe mounting base; 17-1, mounting interface; 17-2, fixed support frame; 18, rubber buffer; 19, guide rod;

[0050] Figure 4 In the middle: 6. Central telescopic discharge pipe, 6-1. Discharge pipe, 10. Guide chute, 14. Spiral frame central platform, 16. Coal discharge outlet, 16-1. Grating plate, 17. Discharge pipe mounting seat, 17-1. Installation interface, 17-2. Fixed support frame, 18. Rubber buffer, 19. Guide rod;

[0051] Figure 5 In the middle: 6. Central telescopic discharge pipe, 6-1. Discharge pipe, 10. Guide chute, 14. Spiral frame central platform, 14-1. Discharge area plane (coal accumulation area), 15. Gap between the circular pipe walls, 16. Coal discharge outlet, 16-1. Grating plate, 16-2. Triangular feed inlet, 17. Discharge pipe mounting base, 17-1. Installation interface, 17-2. Fixed support frame, 18. Rubber buffer, 19. Guide rod;

[0052] Figure 6 , 7In the middle section: 6. Central telescopic discharge pipe, 6-111. First section of round pipe, 10. Guide chute, 14. Spiral frame central platform, 14-1 Discharge area plane (coal accumulation area), 16. Coal discharge outlet, 16-1. Grating plate, 17. Discharge pipe mounting base, 17-1. Mounting interface, 17-2. Fixed support frame, 18. Rubber buffer, 19. Guide rod, 20-1. Flange interface, 20-2. Exhaust port, 20-3. Straight section of discharge pipe, 20-4. Inclined section of discharge pipe, 20-6. Triangular straight section of discharge pipe, 20-7. Arc baffle, 20-8. Fixed mounting surface, 20-9. Fastening bolt, 20-10. Inspection door, 20-11. Blockage sensor mounting base, 20-12. Dust return plate, 21-1. Air accumulation ring, 21-2. Air guide pipe, 22. Coal blockage sensor, 23. Sealing plate;

[0053] Figure 8 In the middle section: 20-1, flange interface; 20-2, vent; 20-3, straight section of discharge pipe; 20-4, inclined section of discharge pipe; 20-5, horizontal reinforcing rib; 20-6, triangular straight section of discharge pipe; 20-7, arc baffle; 20-8, fixed mounting surface; 20-9, fastening bolts; 20-10, inspection door; 20-11, blockage sensor mounting base.

[0054] Figure 9 In the middle: 6-111, first section of round pipe, 6-111-1, flange interface of first section of round pipe, 6-111-2, sealing ring, 6-2, second section of round pipe, 6-3, third section of round pipe, 6-4, fourth section of round pipe, 6-5, fifth section of round pipe;

[0055] Figure 10 Middle: 21-1, air accumulation ring; 21-2, air duct;

[0056] Figure 11 Components: 20-1, Flange interface; 20-2, Exhaust port; 20-3, Straight section of discharge pipe; 20-4, Inclined section of discharge pipe; 20-5, Horizontal reinforcing rib plate; 20-6, Triangular straight section of discharge pipe; 20-7, Arc baffle plate; 20-8, Fixed mounting surface; 20-9, Fastening bolts; 20-10, Inspection door; 20-11, Blockage sensor mounting base; 20-11-1, Sensor cover; 20-12, Dust return plate; 21-1, Air accumulation ring; 21-2, Air guide pipe. Detailed Implementation

[0057] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0058] Example

[0059] like Figure 5As shown, the existing Euro warehouse central telescopic discharge pipe 6 consists of several sections of circular pipes of different diameters nested concentrically. Adjacent sections of circular pipes can also drag each other, forming a discharge pipe device with a telescopic circular pipe assembly. When coal adheres to the pipe wall or there is a gap 15 between the pipe walls when they are nested and overlapping, the adhered coal will hinder the normal sliding movement between the circular pipes. Since the lower end of the overlapping circular pipe assembly is close to the coal drop point, and the Euro warehouse discharge point uses a method of reducing the impact force of coal on the bearing surface by accumulating coal, the lower end of the telescopic discharge pipe is prone to direct contact with the accumulated coal, leading to various malfunctions. In addition, the existing structure of the Euro warehouse discharge point makes it difficult for personnel to enter and handle the situation. Once the central discharge pipe is blocked, it will not be able to provide timely feedback to stop. These problems result in reduced reliability of Euro warehouses when encountering highly viscous coal, difficulties for personnel to handle the situation, high maintenance costs, and long maintenance times.

[0060] Therefore, this solution improves the existing structure and installation connection of the central telescopic discharge pipe in the Euro warehouse (the first section of the central telescopic discharge pipe 6-1 is directly connected to the installation interface 17-1 of the discharge pipe mounting seat 17 on the guide chute 10) to solve various related problems and shortcomings that occur when storing highly viscous coal in the existing Euro warehouse. For example... Figure 6 and Figure 7 As shown, a coal storage bin anti-blocking coal discharge pipe device is provided. An anti-blocking coal discharge pipe 20 is added between the improved central telescopic discharge pipe 6 and the discharge pipe mounting seat 17 on the guide chute 10. The anti-blocking coal discharge pipe 20 enables coal blockage detection, dust-laden gas discharge, and coal accumulation at the discharge point, thus solving the problem of obstruction during the extension and retraction of the central telescopic discharge pipe 6 and improving the bin's adaptability to various types of coal. The upper end of the anti-blocking coal discharge pipe 20 is fixedly connected to the first section of the improved central telescopic discharge pipe 6 (circular pipe 6-111) via a flange. The lower part of the anti-blocking coal discharge pipe 20 is connected to the discharge pipe mounting seat 17 via a fixed mounting surface 20-8. The connection method of the rubber buffer 18 and the guide rod 19 is still used to ensure that the entire central telescopic discharge pipe 6, the anti-blocking coal discharge pipe 20, and the discharge point do not transmit the impact force generated when coal enters.

[0061] like Figure 8 As shown, the anti-blocking coal discharge pipe 20 is mainly composed of a flange interface 20-1, an exhaust port 20-2, a straight section of the discharge pipe 20-3, a sloped section of the discharge pipe 20-4, a horizontal reinforcing rib plate 20-5, a triangular straight section of the discharge pipe 20-6, an arc baffle 20-7, a fixed mounting surface 20-8, fastening bolts 20-9, an inspection door 20-10, and a blockage sensor mounting base 20-11.

[0062] The upper port of the anti-blocking coal discharge pipe 20 is a flange interface 20-1, which is connected to the lower port of the improved central telescopic discharge pipe 6 via a flange. The lower port of the anti-blocking coal discharge pipe is a fixed mounting surface 20-8, which can be connected to the discharge pipe mounting seat 17 on the existing guide chute 10. The connection method is the same as the connection method of the first section of the existing central telescopic discharge pipe 6, which is connected through the rubber buffer 18 and the guide rod 19.

[0063] like Figure 9 As shown, the upper end of the first section of the improved central telescopic discharge pipe 6, the circular pipe 6-111, is a sealing ring 6-111-2. The sealing ring seals the gap between the first section of the circular pipe 6-111 and the second section of the circular pipe 6-2 at the upper end of the first section of the circular pipe 6-111, and ensures that the second section of the circular pipe 6-2 slides up and down relative to the first section of the circular pipe 6-111. The sealing ring 6-111-2 can be made of rubber or polyurethane and other polymer compounds. The lower end is the flange interface 6-111-1 of the first section of the circular pipe, which can be connected and fixed to the flange interface 20-1 of the anti-blocking coal discharge pipe 20. The middle part of the first section of the circular pipe 6-111 has a tapered tube feature that is smaller at the top and larger at the bottom, so as to increase the space between it and the second section of the circular pipe 6-2 and avoid coal sticking together with the second section of the circular pipe 6-2.

[0064] Furthermore, in order to collect the dust-laden gas discharged from the exhaust port 20-2 on the anti-blocking coal feeding pipe 20, an air accumulation ring 21-1 and an air guide pipe 21-2 are also configured on the anti-blocking coal feeding pipe 20 (such as...). Figure 10 As shown), the assembly effect is as follows: Figure 11 As shown.

[0065] In practical applications, firstly, the overlapping circular pipes of the non-extended portion of the central telescopic discharge pipe 6 are raised, and an anti-blocking coal discharge pipe 20 is placed between it and the discharge pipe mounting base 17. (If this is applied to the modification of the existing Euro warehouse central discharge pipe, it is necessary to consider the screw conveyor 9 and the screw frame central platform 14 at their highest positions when the Euro warehouse is full. Before adding the anti-blocking coal discharge pipe 20, it is necessary to confirm the margin of the upper stroke of the telescopic discharge pipe 6 when it retracts or appropriately reduce the coal storage capacity of the Euro warehouse. If it is applied to a newly designed Euro warehouse, it can be directly modified and installed.) The upper end of the anti-blocking coal discharge pipe 20 is fixed to the first section of the central telescopic discharge pipe 6, circular pipe 6-111, through a flange connection. The middle fixed mounting surface 20-8 is connected to the discharge pipe mounting base 17. The anti-blocking coal discharge pipe 20 is equipped with a dust return plate 20-12 to collect the dust-laden gas generated at the coal drop point below and rise along the pipe wall. To prevent dust-laden gas from rising along the cylinder wall into the gap 15 between the circular pipe walls of the central telescopic material drop pipe, a number of exhaust ports 20-2 are opened on the circumference of the pipe wall at this location to discharge some of the dust-laden gas to the outside of the anti-clogging coal drop pipe 20. An annular gas collection ring 21-1 and a gas guide pipe 21-2 are set around the exhaust ports 20-2 to collect the dust-laden gas discharged from the exhaust ports 20-2 in the gas collection ring 21-1, and then guide it to the coal accumulation area below through the gas guide pipe 21-2. Dust removal equipment or exhaust fans can be further installed at the outlet of the gas guide pipe 21-2 to treat and purify the dust-laden gas, thereby accelerating the discharge of the dust-laden gas. This method can effectively prevent the dust-laden gas from rising along the pipe wall in the central telescopic material drop pipe and entering the gap 15 between the pipe walls, thereby reducing the coal adhering to the pipe wall and improving the reliability of the mutual sliding operation between the circular pipes of the central telescopic material drop pipe.

[0066] Inspection door 20-10 is installed on the anti-blocking coal drop pipe 20. Normally, inspection door 20-10 is closed, but it can be opened when personnel need to handle the situation. This facilitates personnel handling of abnormal situations at the coal drop point and ensures personnel safety.

[0067] A blockage sensor 22 is installed on the anti-blockage coal feeding pipe 20. This requires a blockage sensor mounting base 20-11, and a sensor cover 20-11-1 to protect the blockage sensor 22 from damage by falling coal impacts. The blockage sensor 22 detects coal accumulation within the anti-blockage coal feeding pipe 20. When the coal accumulation reaches a certain height, a signal is sent, allowing for control of reducing or stopping the coal feed. Feeding resumes once the blockage is cleared, preventing coal accumulation at the drop point from contacting the central feeding pipe wall. This reduces the risk of jamming during the telescopic feeding pipe's extension and retraction, and ensures safety in the Euro warehouse against coal accumulation at the top of the central feeding pipe.

[0068] The upper part of the anti-blocking coal discharge pipe 20 adopts a circular pipe wall, namely the straight section 20-3 of the discharge pipe, while the lower part of the anti-blocking coal discharge pipe 20 adopts a sloped section 20-4 of the discharge pipe. The sloped section is designed to be the same size as the triangular inlet 16-2 of the coal discharge outlet 16 at the discharge point. The lower part uses a triangular straight section 20-6 and an arc baffle 20-7 to form a triangular prism-shaped discharge pipe. The two lower sides of this discharge pipe directly connect with the triangle on the plane 14-1 of the coal discharge outlet 16 in the discharge area. The two sides of the material drop area are joined together. Two sealing plates 23 are arranged on both sides of the material drop port on the plane 14-1 of the material drop area. Through the sealing plates 23 and the triangular straight section material pipe 20-6 of the anti-blocking coal drop pipe 20, the material drop area plane 14-1 and the coal drop outlet 16 are separated in the guide chute 10. This ensures that all the falling coal is concentrated on the triangular inlet 16-2 before being discharged, thereby avoiding the accumulation of falling coal on the plane 14-1 of the material drop area and eliminating the coal accumulation on the plane 14-1 of the material drop area. The anti-blocking coal discharge pipe 20 designed in this scheme enters the coal discharge area at the bottom from the central telescopic discharge pipe of the Euro warehouse. It will not accumulate on the plane 14-1 of the discharge area, but will fall directly onto the coal discharge outlet 16, and then enter the Euro warehouse through the outlet. Utilizing the special structure of the anti-blocking coal discharge pipe 20—the smooth surfaces of the inclined section 20-4, the triangular straight section 20-6, and the arc baffle 20-7, with the angle between the inclined surface and the horizontal plane greater than 70°, even highly viscous coal cannot accumulate in the bottom guide chute 10 of the central telescopic discharge pipe 6 of the Euro warehouse. This effectively improves the Euro warehouse's ability to pass through viscous coal. In practical applications, the triangular straight section 20-6 and the inclined section 20-4 can also be designed to be made of wear-resistant materials, or wear-resistant support plates (which can be made of ceramic or wear-resistant steel plates) can be installed inside to further improve the service life of the anti-blocking coal discharge pipe 20.

[0069] In summary, this solution can reduce various blockages and coal malfunctions in the central telescopic discharge pipe 6 caused by wet coal, and can reduce the serious consequences caused by the inability of the Euro warehouse to operate normally. At the same time, it also has the functions of coal blockage detection, dust gas discharge, and coal anti-accumulation at the discharge point.

Claims

1. A coal feeding pipe for use in a coal storage bin to prevent blockage, characterized in that, The device includes a central telescopic discharge pipe (6), an anti-blocking coal discharge pipe (20), and a discharge pipe mounting base (17) connected in sequence. The middle part of the first section of the central telescopic discharge pipe (6) is a tapered pipe structure with a smaller top and a larger bottom. The first section of the circular pipe is connected to the upper end of the anti-blocking coal discharge pipe (20). The anti-blocking coal discharge pipe (20) is equipped with a dust return plate (20-12) to guide the dust-laden gas generated at the coal drop point below along the pipe wall downwards, so as to prevent the dust-laden gas from rising along the cylinder wall into the gap between the circular pipe walls of the central telescopic discharge pipe (6). The anti-blocking coal discharge pipe (20) is provided with an exhaust port (20-2) to discharge the internal dust-laden gas to the outside of the anti-blocking coal discharge pipe (20). The anti-blocking coal discharge pipe (20) includes a flange interface (20-1), a straight section of the discharge pipe (20-3), a sloped section of the discharge pipe (20-4), and a triangular straight section of the discharge pipe (20-6) connected in sequence. The flange interface (20-1) is connected to the lower end of the first section of the circular pipe. The dust return plate (20-12) is set at the connection position between the straight section of the discharge pipe (20-3) and the flange interface (20-1). The exhaust port (20-2) is opened on the upper end of the straight section of the discharge pipe (20-3).

2. The anti-blocking coal feeding pipe for a coal storage bin according to claim 1, characterized in that, The exhaust port (20-2) is surrounded by a gas collection ring (21-1) for collecting dust-laden gas. The gas collection ring (21-1) is connected to a gas guide pipe (21-2), which is used to guide the collected dust-laden gas to the coal accumulation area below.

3. The anti-blocking coal feeding pipe for a coal storage bin according to claim 2, characterized in that, The outlet of the air duct (21-2) is equipped with a dust removal device or an exhaust fan.

4. The anti-blocking coal feeding pipe for a coal storage bin according to claim 1, characterized in that, The lower end of the straight section (20-3) of the material discharge pipe is provided with a blockage sensor mounting base (20-11) for installing and connecting a blockage sensor. The blockage sensor is used to detect the coal accumulation state in the material discharge pipe device. The blockage sensor mounting base (20-11) is provided with a sensor cover to protect the blockage sensor from being damaged by falling coal impact.

5. The anti-blocking coal feeding pipe for a coal storage bin according to claim 1, characterized in that, An inspection door (20-10) that can be opened and closed is provided on the wall of the inclined section (20-4) of the material drop pipe to facilitate users to carry out inspection and maintenance.

6. The anti-blocking coal feeding pipe for a coal storage bin according to claim 1, characterized in that, The lower end of the inclined section (20-4) of the material drop tube is provided with a horizontal reinforcing rib and a fixed mounting surface. The fixed mounting surface is connected to the material drop tube mounting seat (17) through a rubber buffer (18) and a guide rod (19).

7. The anti-blocking coal feeding pipe for a coal storage bin according to claim 1, characterized in that, The upper end of the triangular straight section material pipe (20-6) is provided with an arc baffle (20-7) to form a triangular columnar material drop pipe. The two sides of the lower end of the triangular straight section material pipe (20-6) are directly connected to the two sides of the triangle on the plane of the material drop area of ​​the coal drop outlet. Two sealing plates (23) are arranged on both sides of the material drop outlet on the plane of the material drop area. The sealing plates (23) and the triangular straight section material pipe (20-6) separate the plane of the material drop area and the coal drop outlet in the guide chute (10) to ensure that all the falling coal is concentrated on the triangular inlet before being output, so as to avoid the falling coal from accumulating on the plane of the material drop area.

8. The anti-blocking coal feeding pipe for a coal storage bin according to claim 1, characterized in that, The upper end of the first section of the circular pipe is a sealing ring (6-111-2), which is used to seal the gap between the first section of the circular pipe and the second section of the circular pipe at the upper end of the first section of the circular pipe and to ensure that the second section of the circular pipe slides up and down relative to the first section of the circular pipe. The lower end of the first section of the circular pipe is a flange interface (20-1), which is used to connect and fix with the flange interface (20-1) of the anti-blocking coal drop pipe (20).

9. A coal feeding pipe for use in a coal storage bin according to claim 8, characterized in that, The sealing ring (6-111-2) is made of rubber or polyurethane material.

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