A ventilation and blanking device for coal storage bin

Abstract

The present invention relates to a ventilation and blanking device for a coal storage Euro warehouse, comprising a top blanking pipe, an axial flow blower and a baffle door, wherein the top blanking pipe comprises a first pipe and a second pipe, wherein the inlet end of the second pipe is connected to the outlet end of the first pipe, and the side wall of the second pipe is connected to an air supply pipe, the axial flow blower is arranged at the inlet end of the air supply pipe, and the outlet end of the second pipe is connected to the central telescopic blanking pipe of the Euro warehouse, and the baffle door is movably arranged in the second pipe and is connected to a driving mechanism; when feeding, the driving mechanism drives the baffle door so that the baffle door closes the air supply pipe and the axial flow blower is turned off; when ventilating, the driving mechanism drives the baffle door so that the baffle door closes the first pipe and the axial flow blower is turned on. Compared with the prior art, the present invention has the advantages of high ventilation efficiency, good ventilation effect, simple structure, easy layout and low cost.

Description

Technical Field

[0001] The invention relates to a coal storage technology, in particular to a ventilation and blanking device for a coal storage bin. Background Art

[0002] like Figure 6 Euro warehouse coal is the latest environmentally friendly coal storage method in China. Since the types of coal used in Euro warehouse coal storage abroad are quite different from those in China, the moisture content of foreign coal is lower, and less water vapor is volatilized during coal storage. In the actual coal storage process, the water vapor concentration in the Euro warehouse is low, which will not affect the environment in the Euro warehouse. However, the coal used in China is mainly lignite, which has a high proportion of coal powder particles, volatile matter and moisture content, and is easy to self-ignite. Therefore, a higher water vapor concentration will be generated in the warehouse body 16 of the Euro warehouse. When the higher concentration of water vapor encounters the warehouse body 1 6 and the metal structure of the silo 16 will condense into water droplets, and the water droplets will combine with the gases released by various coals in the silo 16 to produce various acidic corrosive substances. The acidic corrosive substances will adhere to the surface of the metal equipment, which is not conducive to the rust prevention of the metal equipment. In addition, the coal commonly used by domestic power generation enterprises has a high volatile content and a large amount of volatility. When the coal is stored, more methane and carbon monoxide are volatilized. When these flammable gases gather in the silo, it is very easy to cause various fires or endanger the personal safety of maintenance and operation personnel entering the silo.

[0003] Domestic power generation companies generally use coal, which is prone to spontaneous combustion. In order to ensure the safety of coal storage, nitrogen is needed to prevent the oxidation reaction of coal. A large amount of nitrogen is released from the bottom of the warehouse body 16 of the Euro warehouse so that the nitrogen can fill the gaps between the coal particles, thereby isolating the oxygen around the coal and reducing the possibility of oxidation reaction of the coal. However, when this method is used, it is inevitable that some nitrogen will penetrate from the coal piled in the warehouse and spread to the space in the warehouse body 16 where no coal is piled. This will also reduce the oxygen content in the space in the warehouse body 16 where no coal is piled. When personnel need to enter the warehouse body 16 for equipment maintenance or operation, there will be a risk of suffocation due to the low oxygen concentration. Except for conventional positive pressure respirators, most other types of masks and face shields cannot effectively ensure the normal breathing of operators. However, after wearing positive pressure respirators, operators are inconvenient to move and cannot meet normal operating requirements.

[0004] like Figure 8Although the roof 26 of the Euro warehouse is equipped with a top fan 10, the Euro warehouse is not a sealed container. There are many gaps in many structural joints of the Euro warehouse, such as between the roof 26 and the warehouse body 16. Since the flow of gas occurs from the place with the least resistance, the gas outside the warehouse body 16 will enter the warehouse body 16 through the gaps, and then flow to the top fan 10 and be discharged by the top fan 10. Therefore, the top fan 10 mainly discharges the gas in the vicinity thereof, while the flow speed of the gas near the coal pile in the warehouse body 16 is relatively slow. The water vapor and various gases in the warehouse body 16 of the Euro warehouse are mainly gathered in the vicinity of the upper surface of the coal pile at the bottom of the warehouse body 16, and the top fan 10 is used to discharge the gas. The actual exhaust effect of the lower fan 10 is not good, especially when the height of the coal pile in the Euro warehouse is low, that is, when the amount of stored coal is small, the distance between the surface of the coal pile and the warehouse roof 26 is far, and it takes at least 10 hours to replace the gas in the warehouse. In addition, if the exhaust volume of the top fan 10 is greater than the amount of air entering the warehouse body 16 from the gap, a negative pressure will be formed in the warehouse, causing a load on the warehouse roof 26, posing a hidden danger to the safety of coal storage in the Euro warehouse. At the same time, the gas near the coal pile cannot be effectively flowed to a position close to the warehouse roof 26, and the ventilation cannot be effectively carried out, which will seriously restrict the timeliness of personnel entering the warehouse. This situation seriously affects the normal coal storage production operation of the Euro warehouse. Summary of the invention

[0005] The purpose of the present invention is to provide a ventilation and blanking device for a coal storage bin in order to overcome the defects of the above-mentioned prior art. The device utilizes a telescopic blanking pipe extending from the upper part of the bin to the center of the coal accumulation surface in the bin as an air delivery channel, which can quickly and effectively discharge the gas near the coal pile inside the bin, and effectively solve the ventilation problem that occurs when the bin is storing coal. The device has high ventilation efficiency, good ventilation effect, simple structure, easy layout and low cost.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A revolving trestle, a winch lifting mechanism, a trestle walking mechanism, a central bearing, a central telescopic drop pipe and a spiral frame are arranged in the warehouse body of the Euro warehouse, and a spiral machine is arranged on the spiral frame. A coal conveying trestle is arranged on the warehouse roof of the Euro warehouse, and a feeding conveyor is arranged in the coal conveying trestle. The coal is conveyed to the top drop pipe by the feeding conveyor, and the coal falls from the outlet of the top drop pipe to the feeding port located on the upper part of the central telescopic drop pipe on the warehouse roof. The coal passes through the central telescopic drop pipe, the guide cover and the guide groove in turn, and then the coal is pushed out and paved by the spiral frame. The revolving trestle moves in a circle on the circular track on the warehouse body under the drive of the trestle walking mechanism. The spiral frame is suspended on the revolving trestle by a lifting wire rope. The spiral frame rotates with the rotation of the revolving trestle. At the same time, the suspended lifting wire rope makes the spiral frame do lifting and lowering motion through the winch mechanism, so that the position of the spiral frame changes with the change of the stacking height;

[0008] The central telescopic drop pipe is formed by concentrically connecting several sections of circular tubes with different diameters. Steps with different diameters are provided at both ends of each section of circular tube, so that two adjacent sections of circular tubes are hooked together and can slide relatively along the axial direction of the circular tube. Several sections of circular tubes are connected on an axis. As the distance between the two ends of the central telescopic drop pipe is extended or shortened, the tubes are expanded or contracted section by section. In this way, the distance between the two ends of the central telescopic drop pipe can change with the distance between the revolving trestle and the spiral frame, ensuring that the coal always passes through the central telescopic drop pipe. The inner diameter of the central telescopic drop pipe is 1.1 meters to 1.4 meters.

[0009] A ventilation and blanking device for a coal storage bin comprises a top blanking pipe, an axial flow blower and a baffle door, wherein the top blanking pipe comprises a first pipe and a second pipe, one end of the second pipe is connected to the outlet end of the first pipe, and the other end is connected to the central telescopic blanking pipe, the side wall of the second pipe is connected to an air supply pipe, the axial flow blower is arranged at the inlet end of the air supply pipe, and the baffle door is movably arranged in the second pipe and connected to a driving mechanism;

[0010] During feeding, the driving mechanism drives the damper door to close the air supply pipe, and the axial flow blower is turned off. At this time, the passage from the inlet end of the first pipe to the outlet end of the second pipe is open, and the coal passes through the first pipe, the second pipe and the central telescopic drop pipe in sequence and falls into the bin body;

[0011] During ventilation, the driving mechanism drives the baffle door to close the first pipe. At this time, the passage from the inlet end of the air supply pipe to the outlet end of the second pipe is in an open state, the axial flow blower is turned on, and the outlet end of the central telescopic blanking pipe is extended to the vicinity of the coal pile. At this time, the air outside the silo passes through the axial flow blower, the air supply pipe, the second pipe, the central telescopic blanking pipe and the guide groove in sequence and then enters the silo body. Since the outlet end of the central telescopic blanking pipe is close to the coal pile, the air flow speed near the coal pile in the silo body is increased, the original air can be quickly replaced, the time required for air replacement in the silo body is greatly shortened, and the air replacement effect is improved. At the same time, since the guide groove located at the outlet end of the central telescopic blanking pipe rotates with the rotation of the revolving trestle, the air outside the silo body that goes out of the guide groove will also diffuse in the circumferential direction, further improving the air flow speed and replacement effect.

[0012] Further, the baffle door is movably arranged in the second pipe through the baffle door shaft, the driving mechanism includes an electric push rod, the electric push rod is arranged on the outer side wall of the second pipe through a support, the telescopic push rod of the electric push rod is connected to a rocker arm, the end of the baffle door shaft passes through the side wall of the second pipe and is connected to the rocker arm, the second pipe is provided with two proximity sensors for detecting the position of the rocker arm, and the proximity sensor, the axial flow blower and the electric push rod are all connected to the controller;

[0013] When feeding, the telescopic push rod of the electric push rod is reset, and the baffle door shaft is driven to rotate through the rocker arm. At this time, the baffle door rotates downward with the baffle door shaft as the axis, and the baffle door shaft closes the air supply pipe. At this time, one of the proximity sensors detects the first position signal of the rocker arm and sends it to the controller, indicating that the feeding conveyor has the conditions for starting feeding. At this time, the controller can control the feeding conveyor to start;

[0014] During ventilation, the telescopic push rod of the electric push rod extends out and drives the baffle door shaft to rotate through the rocker arm. At this time, the baffle door rotates upward with the baffle door shaft as the axis, and the baffle door shaft closes the first pipe. At this time, another proximity sensor detects the second position signal of the rocker arm and sends it to the controller, indicating that the axial flow fan has the conditions to start air supply. At this time, the controller can control the axial flow fan to start.

[0015] Furthermore, conical bosses are provided on both sides of the baffle door, and the bosses match the outlet end of the first pipe and the outlet end of the air supply pipe. The outlet end of the first pipe is provided with a first flexible sealing ring, and the outlet end of the air supply pipe is provided with a second flexible sealing ring. When the baffle door seals the first pipe or the air supply pipe, the boss is inserted into the outlet end of the first pipe or the air supply pipe, and at the same time, the inclined surface of the boss correspondingly opens the first flexible sealing ring or the second flexible sealing ring. The first flexible sealing ring or the second flexible sealing ring is tightly combined with the inclined surface of the boss, with good sealing performance to prevent leakage of materials or gas. At the same time, due to the flexible contact, if the proximity sensor detects a signal delay, resulting in the electric push rod failing to stop in time, it will not cause damage to the equipment structure, with good safety and long service life.

[0016] Furthermore, the first pipe is in a truncated cone shape, which is beneficial to expanding the area of ​​the inlet end of the first pipe and facilitating material dropping.

[0017] Furthermore, a flange is provided at the outlet end of the second pipeline to facilitate the connection between the second pipeline and the central telescopic drop pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The top drop pipe of the present invention comprises a first pipe and a second pipe, the two ends of the second pipe are respectively connected to the first pipe and the central telescopic drop pipe, the second pipe is connected to an air supply pipe, an axial flow blower is provided at the end of the air supply pipe, a baffle door is movably arranged in the second pipe, and is connected to a driving mechanism, the baffle door is used to control the first pipe and the air supply pipe to be respectively connected, and the axial flow blower is turned on during ventilation, the outlet end of the central telescopic drop pipe is extended to the vicinity of the coal pile, and the air outside the silo passes through the axial flow blower, the air supply pipe, the second pipe, the central telescopic drop pipe and the guide groove in sequence, and then enters the silo body. Since the outlet end of the central telescopic drop pipe is close to the coal pile, the air flow speed near the coal pile in the silo body is increased, forcing the gas near the coal pile to flow out of the silo. The air is discharged from various structural gaps of the silo or the top fan of the silo roof, which can quickly replace the original air, greatly shorten the time required for air replacement in the silo, improve the effect of air replacement, and effectively solve the ventilation problem of the euro silo when storing lignite, improve the adaptability of the euro silo to different types of coal, and effectively reduce the corrosion of the silo structure and equipment by various acidic corrosive materials formed by the combination of gas and water in the silo, thereby increasing the service life of the equipment and silo structure, ensuring the safety of coal storage and the normal work of personnel entering the silo. At the same time, the present invention combines the structural characteristics of the euro silo itself, does not need to change the load-bearing load of the original equipment of the euro silo, has a simple structure, is easy to deploy, and has low cost;

[0020] (2) The guide groove at the outlet end of the central telescopic drop pipe of the present invention rotates with the rotation of the rotary trestle, and the air outside the bin body that flows out of the guide groove will also diffuse in the circumferential direction along the direction of the material feeding of the guide slide, thereby further improving the air flow speed and replacement effect, and at the same time preventing the air overflowing from the outlet end of the central telescopic drop pipe from directly rushing to the coal pile and generating dust;

[0021] (3) The ventilation blanking device of the present invention drives the baffle door through a driving mechanism to control the conduction between the first pipeline and the air supply pipe, and detects the position of the rocker arm through a proximity sensor to achieve indirect detection of the position of the baffle door. It has a high degree of automation, a simple structure, a low cost, and is easy to be arranged on site;

[0022] (4) Conical bosses are provided on both sides of the baffle door of the present invention, and the bosses match the outlet end of the first pipe and the outlet end of the air supply pipe. The outlet end of the first pipe is provided with a first flexible sealing ring, and the outlet end of the air supply pipe is provided with a second flexible sealing ring. The materials of the first flexible sealing ring and the second flexible sealing ring are rubber or polyurethane materials. When the baffle door seals the first pipe or the air supply pipe, the boss is inserted into the outlet end of the first pipe or the air supply pipe, and at the same time, the inclined surface of the boss correspondingly opens the first flexible sealing ring or the second flexible sealing ring. The first flexible sealing ring or the second flexible sealing ring is tightly combined with the inclined surface of the boss, and the sealing performance is good to prevent leakage of materials or gas. At the same time, due to the flexible contact, if the proximity sensor detects a signal delay, resulting in the electric push rod failing to stop in time, it will not cause damage to the equipment structure, and the safety is good and the service life is long;

[0023] (5) The first pipe of the present invention is in a truncated cone shape, which is beneficial to expand the area of ​​the inlet end of the first pipe and facilitate the blanking;

[0024] (6) The outlet end of the second pipe of the present invention is provided with a flange to facilitate the connection between the second pipe and the central telescopic drop pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 is a schematic diagram of the internal structure of the second pipeline;

[0027] Figure 3 This is a schematic diagram of the structure when the first pipeline of the present invention is closed;

[0028] Figure 4 This is a schematic diagram of the structure of the present invention when the air supply pipe is closed;

[0029] Figure 5 is a schematic structural diagram of a first flexible sealing ring;

[0030] Figure 6 This is a schematic diagram of the internal structure of the Euro warehouse;

[0031] Figure 7 This is a schematic diagram of the position of the present invention on the Euro warehouse;

[0032] Figure 8 This is a schematic diagram of the top structure of the Euro warehouse;

[0033] Fig. 9 It is a structural schematic diagram of the material guide slide plate;

[0034] Fig.10 It is a structural schematic diagram of the baffle door;

[0035] Description of the numbers in the figure:

[0036] 1. First pipeline, 2. Second pipeline, 3. Baffle door shaft, 4. Proximity sensor, 5. Axial flow fan, 6. Electric push rod, 7. Flange, 8. Support, 9. Rocker arm, 10. Top fan, 11. First flexible sealing ring, 12. Boss, 13. Baffle door, 14. Air supply pipe, 15. Second flexible sealing ring, 16. Bin, 17. Rotating trestle, 18. Lifting wire rope, 19. Center telescopic drop pipe, 20. Guide trough, 21. Feed conveyor, 22. Top drop pipe, 23. Feed port, 24. Coal transport trestle, 25. Screw machine, 26. Bin roof, 27. Spiral frame, 28. Annular track, 29. Guide slide plate. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0038] like Figure 6 and Fig. 9The warehouse body 16 of the Euro warehouse is provided with a revolving trestle 17, a hoisting lifting mechanism, a trestle walking mechanism, a central bearing, a central telescopic drop pipe 19 and a spiral frame 27, on which a screw machine 25 is provided, and the warehouse roof 26 of the Euro warehouse is provided with a coal conveying trestle 24, in which a feeding conveyor 21 is provided, and the coal is conveyed to the top drop pipe 22 by the feeding conveyor 21, and the coal falls from the outlet of the top drop pipe 22 to the feeding port 23 located on the top of the central telescopic drop pipe 19, and the coal passes through the central telescopic drop pipe 19 in sequence. The coal is pushed out and laid flat through the spiral frame 27. The revolving trestle 17 moves in a circle on the circular track 28 on the bin body 16 under the drive of the trestle walking mechanism. The spiral frame 27 is suspended on the revolving trestle 17 through the lifting wire rope 18. The spiral frame 27 rotates with the rotation of the revolving trestle 17. At the same time, the suspended lifting wire rope 18 makes the spiral frame 27 move up and down through the winch mechanism, so that the position of the spiral frame 27 changes with the change of the stockpile height.

[0039] The central telescopic drop tube 19 is formed by concentrically connecting several sections of circular tubes of different diameters. Steps of different diameters are provided at both ends of each section of circular tube, so that two adjacent sections of circular tubes are hooked together and can slide relative to each other along the axial direction of the circular tube. Several sections of circular tubes are connected on an axis, and expand or contract section by section as the distance between the two ends of the central telescopic drop tube 19 is extended or shortened. In this way, the distance between the two ends of the central telescopic drop tube 19 can change with the distance between the revolving trestle 17 and the spiral frame 27, ensuring that the coal always passes through the central telescopic drop tube 19.

[0040] A ventilation and blanking device for coal storage bin, such as Figure 1 , Figure 3 and Figure 7 , including a top blanking pipe 22, an axial flow blower 5 and a baffle door 13, the top blanking pipe 22 includes a first pipe 1 and a second pipe 2, one end of the second pipe 2 is connected to the outlet end of the first pipe 1, and the other end is connected to the central telescopic blanking pipe 19, the side wall of the second pipe 2 is connected to the air supply pipe 14, the axial flow blower 5 is arranged at the inlet end of the air supply pipe 14, the baffle door 13 is movably arranged in the second pipe 2 through the baffle door shaft 3, and is connected to a driving mechanism, the driving mechanism includes an electric push rod 6, the electric push rod 6 is arranged on the outer side wall of the second pipe 2 through a support 8, the output end of the electric push rod 6 is connected to a rocker arm 9, the end of the baffle door shaft 3 passes through the side wall of the second pipe 2 and is connected to the rocker arm 9, two proximity sensors 4 for detecting the position of the rocker arm 9 are provided on the second pipe 2, and the proximity sensor 4, the axial flow blower 5 and the electric push rod 6 are all connected to the controller;

[0041] The first pipe 1 is in a truncated cone shape, which is beneficial to expanding the area of ​​the inlet end of the first pipe 1 and facilitating material dropping.

[0042] A flange 7 is provided at the outlet end of the second pipeline 2 to facilitate the connection between the second pipeline 2 and the central telescopic blanking pipe 19 .

[0043] The hysteresis, response time, detection frequency and repeatability of the proximity limit of the proximity sensor 4 can match the external dimensions of the rocker arm 9. The type of proximity limit selected should match the material and surface color of the rocker arm 9. The minimum distance between the proximity limit and the rocker arm 9 should meet the distance requirement for the output of the proximity limit trigger electrical signal.

[0044] like Figure 4 During feeding, the output end of the electric push rod 6 is reset, and the damper door shaft 3 is driven to rotate through the rocker arm 9. At this time, the damper door 13 rotates downward with the damper door shaft 3 as the axis, and the damper door shaft 3 closes the air supply pipe 14, and the axial flow blower 5 is turned off. At this time, the passage from the inlet end of the first pipeline 1 to the outlet end of the second pipeline 2 is in an open state. One of the proximity sensors 4 detects the first position signal of the rocker arm 9 and sends it to the controller, indicating that the feeding conveyor 21 has the conditions for starting feeding. At this time, the controller controls the feeding conveyor 21 to start, and the coal passes through the first pipeline 1, the second pipeline 2 and the central telescopic drop pipe 19 in sequence, and falls into the bin body 16;

[0045] like Figure 3 During ventilation, the output end of the electric push rod 6 extends out and drives the damper door shaft 3 to rotate through the rocker arm 9. At this time, the damper door 13 rotates upward with the damper door shaft 3 as the axis, and the damper door shaft 3 closes the first pipeline 1. At this time, the channel from the inlet end of the air supply pipe 14 to the outlet end of the second pipeline 2 is in an open state. At this time, another proximity sensor 4 detects the second position signal of the rocker arm 9 and sends it to the controller, indicating that the axial flow fan 5 has the conditions for starting air supply. The controller controls the axial flow fan 5 to start, and the outlet end of the central telescopic blanking pipe 19 extends to the vicinity of the coal pile. At this time, the air outside the warehouse body 16 passes through the axial flow fan 5, the air supply pipe 14, the second pipeline 2, the central telescopic blanking pipe 19, and the guide slide plate in sequence. After passing through the guide groove 29 and the guide groove 20, it enters the silo 16. Since the outlet end of the central telescopic drop pipe 19 is close to the coal pile, the air flow speed near the coal pile in the silo 16 is improved, and the original air can be quickly replaced, which greatly shortens the time required for air replacement in the silo 16 and improves the air replacement effect. At the same time, since the guide groove 20 located at the outlet end of the central telescopic drop pipe 19 rotates with the rotation of the revolving trestle 17, the external air of the silo 16 that goes out of the guide groove 20 will also diffuse in the circumferential direction along the direction of the material feeding of the guide slide plate, which further improves the air flow speed and replacement effect. At the same time, it can prevent the air overflowing from the outlet end of the central telescopic drop pipe 19 from directly rushing to the coal pile and generating dust.

[0046] like Figure 5 and Fig.10, conical bosses 12 are provided on both sides of the baffle door 13, and the bosses 12 match the outlet ends of the first pipe 1 and the air supply pipe 14. A first flexible sealing ring 11 is provided at the outlet end of the first pipe 1, and a second flexible sealing ring 15 is provided at the outlet end of the air supply pipe 14. The materials of the first flexible sealing ring 11 and the second flexible sealing ring 15 are rubber or polyurethane materials. When the baffle door 13 seals the first pipe 1 or the air supply pipe 14, the boss 12 is inserted into the outlet end of the first pipe 1 or the air supply pipe 14, and at the same time, the inclined surface of the boss 12 correspondingly opens the first flexible sealing ring 11 or the second flexible sealing ring 15. The first flexible sealing ring 11 or the second flexible sealing ring 15 is tightly combined with the inclined surface of the boss 12, with good sealing performance to prevent leakage of materials or gas. At the same time, due to the flexible contact, if the proximity sensor 4 detects a signal delay, resulting in the electric push rod 6 failing to stop in time, it will not cause damage to the equipment structure, with good safety and long service life.

[0047] The present invention provides a ventilation and dropping device for a coal storage euro warehouse, which combines the characteristics of the euro warehouse and the feeding conveyor 21, and uses the telescopic coal dropping pipe 19 arranged on the axis of the warehouse body 16 of the euro warehouse for ventilation, without changing the load-bearing load of the original equipment of the euro warehouse. The axial flow blower 5 has low energy consumption and can send more than 20000Nm3 / h of fresh air outside the warehouse into the area near the coal pile in the warehouse, and can disperse the water vapor near the coal pile and the volatile gases volatilized from various coals or the nitrogen used for inerting the coal, forcing these gases to be discharged from various structures of the warehouse body 16. The air is discharged from the top fan 10 of the silo structure gap or the silo roof 26, which plays a role in quickly replacing the gas in the silo body 16. Since the air is directly supplied to the upper surface of the coal pile in the silo, the ventilation effect is obvious, which can effectively solve the ventilation problem of the Euro silo when storing lignite, improve the adaptability of the Euro silo to different types of coal, and effectively reduce the corrosion of various acidic corrosive materials formed by the combination of gas and water in the silo body 16 on the silo structure and equipment, thereby increasing the service life of the equipment and silo structure, ensuring the safety of coal storage and the normal work of personnel entering the silo;

[0048] When the axial flow blower 5 is working, a small amount of air in the transported air may overflow from the joints between the segments of the central telescopic drop pipe 19, but the overflowed air is still dispersed into the Euro bin, and more than 80% of the air will be transported to the bottom of the central telescopic drop pipe 19, and then diffused in the area above the surface of the coal pile in the bin after coming out from the outlet of the central telescopic drop pipe 19. Since the temperature of the transported air outside the bin is lower than that of the gas inside the bin, it is easier to lift the gas inside the bin, thereby improving the efficiency of air replacement in the bin;

[0049] At the same time, the ventilation blanking device drives the baffle door 13 through the driving mechanism, controls the conduction of the first pipeline 1 and the air supply pipe 14, detects the position of the rocker arm 9 through the proximity sensor 4, and realizes indirect detection of the position of the baffle door 13. It has a high degree of automation, a simple structure, low cost, and is easy to arrange on site.

[0050] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A ventilation and blanking device for a coal storage bin, comprising a top blanking pipe (22), characterized in that: It also includes an axial flow blower (5) and a baffle door (13), the top drop pipe (22) includes a first pipe (1) and a second pipe (2), the inlet end of the second pipe (2) is connected to the outlet end of the first pipe (1), the side wall of the second pipe (2) is connected to an air supply pipe (14), the axial flow blower (5) is arranged at the inlet end of the air supply pipe (14), the outlet end of the second pipe (2) is connected to the central telescopic drop pipe (19) of the Euro bin, and the baffle door (13) is movably arranged in the second pipe (2) and is connected to a driving mechanism; During feeding, the driving mechanism drives the baffle door (13), so that the baffle door (13) closes the air supply pipe (14), and the axial flow blower (5) is turned off; During ventilation, the driving mechanism drives the baffle door (13) so that the baffle door (13) closes the first pipeline (1), and the axial flow blower (5) is turned on.

2. A ventilation and blanking device for coal storage bin according to claim 1, characterized in that: The baffle door (13) is movably arranged in the second pipeline (2) via the baffle door shaft (3).

3. A ventilation and blanking device for coal storage bin according to claim 2, characterized in that: The driving mechanism comprises an electric push rod (6), which is arranged on the outer wall of the second pipe (2) through a support (8), the output end of the electric push rod (6) is connected to a rocker arm (9), and the end of the baffle door shaft (3) passes through the side wall of the second pipe (2) and is connected to the rocker arm (9).

4. A ventilation and blanking device for coal storage bin according to claim 3, characterized in that: The second pipeline (2) is provided with two proximity sensors (4) for detecting the position of the rocker arm (9).

5. The ventilation and blanking device for coal storage bin according to claim 1, characterized in that: Bosses (12) are provided on both sides of the baffle door (13), and the bosses (12) match the outlet end of the first pipeline (1) and the outlet end of the air supply pipe (14).

6. A ventilation and blanking device for coal storage bin according to claim 5, characterized in that: The boss (12) is conical.

7. The ventilation and blanking device for coal storage bin according to claim 1, characterized in that: The outlet end of the first pipe (1) is provided with a first flexible sealing ring (11).

8. The ventilation and blanking device for coal storage bin according to claim 1, characterized in that: The outlet end of the air supply pipe (14) is provided with a second flexible sealing ring (15).

9. The ventilation and blanking device for coal storage bin according to claim 1, characterized in that: The first pipe (1) is in the shape of a truncated cone.

10. The ventilation and blanking device for coal storage bin according to claim 1, characterized in that: The outlet end of the second pipeline (2) is provided with a flange (7).

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