Anti-blocking coal drop pipe
By simulating the swallowing action of the trachea through a breathing mechanism and a drive mechanism, the problems of coal drop pipe blockage and structural instability were solved, achieving low-noise and low-mechanical-fatigue coal powder conveying and extending the service life of the coal drop pipe.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 国家能源集团泰州发电有限公司
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-23
AI Technical Summary
Existing coal chutes are prone to accumulating and agglomerating due to frictional resistance during the conveying of pulverized coal, leading to blockages. Furthermore, high-frequency vibration treatment can affect structural stability and lifespan.
Employing a breathing mechanism and a drive mechanism, the expansion or contraction of the breathing chamber and the deformation of the expansion plate simulate the swallowing action of the throat, achieving the layered compression and loose conveying of pulverized coal. Combined with electromagnetic drive, the breathing frequency and amplitude are adjusted to avoid mechanical fatigue.
It effectively prevents coal dust blockage, maintains structural stability, reduces noise, extends the life of the coal chute, and can dynamically adjust the coal dust falling rate.
Smart Images
Figure CN224393625U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an anti-clogging coal chute, belonging to the technical field of coal chute structure. Background Technology
[0002] The coal dust particles inside the coal chute are very small in diameter, so they easily accumulate due to frictional resistance along the coal layer. This accumulation can easily form clumps, affecting the normal transport of the coal dust. Current technology mainly uses vibration of the coal chute to assist the descent of the coal dust. However, high-frequency reciprocating vibration can easily affect the connection stability of the coal chute structure, leading to bolt loosening and metal fatigue. It also increases the friction intensity between the coal dust and the coal chute, reducing the lifespan of the coal chute. Utility Model Content
[0003] The purpose of this utility model is to provide an anti-clogging coal chute, which solves the problems of unstable structure and short lifespan of existing coal chutes when dealing with coal powder blockage.
[0004] To achieve the above objectives, this utility model employs the following technical solution:
[0005] This utility model provides an anti-clogging coal chute, including a coal chute body, a connecting frame, a breathing mechanism, and a driving mechanism;
[0006] The coal chute body has several staggered connection holes for fixing the breathing mechanism, and the connecting frame has multiple holes, each of which is fixed to the connection hole.
[0007] The breathing mechanism includes a pressure ring, a connecting frame, a sealing membrane, a sealing cover, and an expansion rubber plate. The connecting frame and the connecting frame are connected on the outside. The pressure ring is fixed between the connecting frame and the connecting frame. The sealing membrane is pressed between the pressure ring and the outer wall of the coal chute body. The sealing cover is fixed to the outside of the pressure ring. A breathing chamber is formed between the sealing cover and the sealing membrane. The sealing membrane is made of elastic material. The expansion rubber plate is disposed inside the coal chute body and its edge is connected to the connecting hole.
[0008] The breathing mechanism has multiple connections, each of which is connected to the connection hole.
[0009] The drive mechanism is connected to the breathing chamber and is used to drive the breathing chamber to expand or contract.
[0010] Furthermore, the connecting frame protrudes from the outer wall of the coal chute body.
[0011] Furthermore, a support mesh is embedded within the expanded rubber sheet.
[0012] Furthermore, the support mesh is made of metal fiber.
[0013] Furthermore, the edge of the expanded rubber sheet is embedded into the opening of the connecting hole.
[0014] Furthermore, it also includes a heat insulation cavity, which is disposed on the side of the expansion rubber plate facing the sealing film.
[0015] Furthermore, the heat insulation cavity is filled with a heat insulation plate.
[0016] Furthermore, the drive mechanism includes two sets of piston mechanisms, an electromagnetic drive mechanism, an intake check valve, an exhaust pressure relief valve, and a manifold. The two sets of piston mechanisms are symmetrically arranged and connected to each other through the electromagnetic drive mechanism.
[0017] The electromagnetic drive mechanism includes an iron core winding, a permanent magnet, and a push shaft. The iron core winding is arranged in a ring shape. The permanent magnet is floatingly connected to the middle of the iron core winding. The push shaft passes through and is fixed to the middle of the permanent magnet. The two ends of the push shaft are respectively fixedly connected to the piston blocks of two sets of piston mechanisms.
[0018] The piston housing of the piston mechanism is connected to the intake check valve and the exhaust pressure relief valve respectively. The intake check valve is used to transfer gas into the piston housing, and the exhaust pressure relief valve is connected to each breathing chamber through the manifold. The two sets of piston mechanisms are respectively connected to two adjacent breathing chambers.
[0019] Furthermore, a limiting ring is provided on the inner wall of the front end of the piston housing to limit the floating limit of the piston block, and a gas storage gap is provided between the limiting ring and the end of the piston housing.
[0020] Furthermore, a gas volume regulating ring with an opening is provided between the limiting ring and the end of the piston housing.
[0021] Compared with the prior art, the beneficial effects achieved by this utility model are:
[0022] This utility model provides an anti-clogging coal chuting pipe. Driven by a driving mechanism, the coal powder is propelled by the expansion or contraction of the breathing chamber and the expansion plate. Simultaneously, the surface area of the expansion plate increases during deformation, widening the gaps between the coal powder adhering to the inner wall of the coal chuting pipe. This reduces the binding force caused by static electricity, allowing the coal powder to fall off. At the same time, the adjacent breathing chambers can biomimetically simulate the swallowing action of the throat, layering and squeezing to transport the coal powder. In summary, by achieving coal chuting in a peristaltic manner, compared with the existing vibratory coal chuting technology, it is less likely to cause mechanical fatigue to the structure, maintains structural stability, has lower noise, and extends the service life of the coal chuting pipe.
[0023] Electromagnetic drive can dynamically adjust the breathing frequency and amplitude according to the falling rate of coal dust; while in existing technologies, excessively high vibration frequencies may increase the possibility of structural damage, but increasing the breathing frequency and amplitude does not have this concern or problem. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of an anti-clogging coal chute provided by this utility model;
[0025] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0026] Figure 3 This is a schematic diagram of the drive mechanism provided by this utility model.
[0027] In the diagram: 1. Coal chute body; 2. Expansion rubber sheet; 3. Support mesh; 4. Insulation chamber; 5. Connecting frame; 6. Pressure ring; 7. Sealing membrane; 8. Adapter frame; 9. Sealing cover; 10. Breathing chamber; 11. Connecting valve; 12. Electromagnetic drive mechanism; 13. Iron core winding; 14. Permanent magnet; 15. Push shaft; 16. Piston shell; 17. Adapter flange; 18. Piston block; 19. Limiting ring; 20. Gas volume regulating ring. Detailed Implementation
[0028] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the protection scope of the present invention.
[0029] In the description of the utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of the utility model, unless otherwise stated, "a plurality of" means two or more.
[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.
[0031] Example 1
[0032] like Figures 1 to 3 As shown, the present invention provides an anti-clogging coal chute, comprising a coal chute body 1, a connecting frame 5, a breathing mechanism, and a driving mechanism;
[0033] The main body 1 of the coal chute has several staggered connection holes for fixing the breathing mechanism, and the connecting frame 5 has multiple holes, each of which is fixed to the connection hole.
[0034] The breathing mechanism includes a pressure ring 6, a transition frame 8, a sealing membrane 7, a sealing cover 9, and an expansion rubber plate 2. The transition frame 8 and the connecting frame 5 are connected on the outside. The pressure ring 6 is fixed between the transition frame 8 and the connecting frame 5. The sealing membrane 7 is pressed between the pressure ring 6 and the outer wall of the coal chutes body 1. The sealing cover 9 is fixed to the outside of the pressure ring 6. A breathing chamber 10 is formed between the sealing cover 9 and the sealing membrane 7. The sealing membrane 7 is made of elastic material. The expansion rubber plate 2 is set inside the coal chutes body 1 and its edge is connected to the connecting hole.
[0035] The breathing mechanism has multiple connection holes, each of which is connected to the other.
[0036] The drive mechanism is connected to the breathing chamber 10 and is used to drive the breathing chamber 10 to expand or contract.
[0037] This utility model provides an anti-clogging coal chuting pipe. Driven by a driving mechanism, the coal powder is propelled by the expansion or contraction of the breathing chamber 10 and the expansion rubber plate 2. At the same time, the surface area of the expansion rubber plate 2 increases during deformation, and the gaps between the coal powder adhering to the inner wall of the coal chuting pipe become larger, reducing the binding force caused by static electricity and causing the coal powder to fall off. Meanwhile, the adjacent breathing chambers 10 can biomimetically simulate the swallowing action of the throat, layering and squeezing to achieve the transportation of coal powder. In summary, the coal chuting is achieved through a peristaltic-like method, which, compared with the vibration-type coal chuting in the prior art, is less likely to cause mechanical fatigue to the structure, maintains structural stability, has lower noise, and extends the service life of the coal chuting pipe.
[0038] Example 2
[0039] like Figure 1 As shown, the present invention provides an anti-clogging coal chuting pipe, which includes a breathing mechanism, a driving mechanism, a coal chuting pipe body 1, and a connecting frame 5.
[0040] like Figure 2 As shown, a number of connection holes are arranged in an array on the inner wall of the coal chute body 1, and the connection holes are staggered. The breathing mechanism is arranged on the wall of the coal chute body 1 at the position corresponding to the connection hole.
[0041] The breathing mechanism includes a breathing chamber 10 covering the outer wall of the corresponding connection hole of the coal chute body 1. A connection valve 11 is provided on the side wall of the breathing chamber 10 for connecting the driver. A sealing membrane 7 made of elastic material is provided at the bottom of the breathing chamber 10. An expansion rubber plate 2 connected to the bottom of the breathing chamber 10 is also provided at the opening of the connection hole. The expansion rubber plate 2 is in contact with the sealing membrane 7.
[0042] A connecting frame 5, protruding relative to the outer wall of the coal chute body 1, is provided on the outer side of the connecting hole on the outer side wall of the coal chute body 1. The breathing chamber 10 is fixed inside the connecting frame 5. The connecting frame 5 can improve the rigidity of the coal chute body 1 at local locations, reduce the possibility of deformation of the coal chute body 1 during expansion, and reduce the incidence of metal fatigue on the wall of the coal chute body 1.
[0043] The breathing chamber 10 is fixed to the connecting frame 5 via the adapter frame 8. The fixing of the adapter frame 8 is easier to disassemble than the welding connection.
[0044] The breathing chamber 10 includes a pressure ring 6, which is pressed against the outer wall of the coal chute body 1 at the corresponding connection hole position via a transfer frame 8. A sealing membrane 7 is pressed between the pressure ring 6 and the outer wall of the coal chute body 1. A sealing cap 9 is fixed on the upper part of the pressure ring 6, and the breathing chamber 10 is formed between the sealing cap 9 and the sealing membrane 7. The pressure ring 6 can effectively compress and seal the sealing membrane 7. The breathing chamber 10 has an overall modular structure, making it easier to disassemble and maintain.
[0045] A support mesh 3 made of woven metal fibers is embedded inside the expansion rubber sheet 2. The support mesh 3 can improve the lifespan of the expansion rubber sheet 2 and reduce the possibility of cracking.
[0046] The expansion rubber plate 2 is embedded into the opening of the connection hole. This embedding and fixing ensures that there is no height difference between the expansion rubber plate 2 and the inner wall of the coal chute, reducing the possibility of local coal dust accumulation.
[0047] To accommodate high-temperature pulverized coal, a heat insulation cavity 4 is provided on the side of the expansion plate 2 facing the sealing membrane 7, and a heat insulation board is filled inside the heat insulation cavity 4. The heat insulation board can prevent the heat of the high-temperature pulverized coal from being transferred to the sealing membrane 7, thus affecting the life of the sealing membrane 7, and at the same time prevent the air in the breathing cavity 10 from expanding due to heat, thus affecting the breathing effect. The heat insulation board is made of foamed or powdered material, and the heat insulation board can also expand and float with the breathing of the sealing membrane 7 without affecting the normal operation of the expansion plate 2.
[0048] like Figure 3As shown, the breathing mechanism is driven by a drive mechanism, which includes two symmetrically arranged piston mechanisms connected by an electromagnetic drive mechanism 12. The electromagnetic drive mechanism 12 includes an annular iron core winding 13, with a permanent magnet 14 floatingly connected in the middle of the iron core winding 13. A push shaft 15 is fixedly inserted through the middle of the permanent magnet 14, and both ends of the push shaft 15 are fixedly connected to the piston blocks 17 of the two sets of piston mechanisms. The piston housing 16 of the piston mechanism is connected to the electromagnetic drive mechanism 12 via a transition flange 17. An intake check valve for air intake and an exhaust pressure relief valve for venting gas from the piston housing 16 are connected to the ends of the piston housing 16. The exhaust pressure relief valves are connected to each breathing chamber 10 via a manifold. The two sets of piston mechanisms are respectively connected to two adjacent sets of breathing chambers 10. The end cap facilitates maintenance of the main traction cable and prevents damage caused by friction between the main traction cable and the inner wall of the front end housing.
[0049] A limiting ring 19 is provided on the inner wall of the front end of the piston housing 16 to limit the floating limit of the piston block 17. A gas storage gap is provided between the limiting ring 19 and the end of the piston housing 16. The gas storage gap can buffer the high-pressure gas and prevent damage to the valve body and pipeline caused by excessive pressure.
[0050] A gas volume regulating ring 20 with an opening is also provided between the limiting ring 19 and the end of the piston housing 16. The gas volume regulating ring 20 can easily adjust the volume of the gas storage gap, thereby changing the maximum expansion amount of the expansion plate 2. By replacing different gas volume regulating rings 20, the volume of the gas storage gap can be changed to advance or delay the arrival time of the pressure value in the gas storage gap, and the expansion rate of the expansion plate 2 can also be easily adjusted.
[0051] The electromagnetic drive mechanism 12 of the drive mechanism uses the magnetic field of the periodically reciprocating iron core winding 13 to drive the permanent magnet 14 to move back and forth, thereby driving the push shaft 15 to make the two pistons move differently. When the piston moves toward the electromagnetic drive mechanism 12, gas is drawn in from the intake one-way valve. Then the piston moves toward the end of the piston shell 16. At this time, the intake one-way valve is closed and the exhaust pressure relief valve is also closed. The gas is continuously squeezed by the piston until the critical position, when the exhaust pressure relief valve opens and the gas enters into the breathing chamber 10. The expansion of the sealing membrane 7 squeezes the expansion rubber plate 2, causing the expansion rubber plate 2 to push the coal powder. At the same time, during the deformation of the expansion rubber plate 2, the surface area increases, the gap between the coal powder adhering to the inner wall of the coal drop pipe becomes larger, the binding force caused by static electricity decreases, and the coal powder falls off. Meanwhile, the adjacent breathing chambers 10 can biomimetically simulate the swallowing action of the throat, and the coal powder is transported by layered compression and relaxation.
[0052] Compared to existing vibratory coal dropping technologies, this structure is pneumatically driven, resulting in lower noise and less likelihood of mechanical fatigue. Furthermore, the electromagnetic drive allows for convenient dynamic adjustment of the breathing frequency and amplitude based on the coal dust falling rate. In contrast, excessively high vibration frequencies in existing technologies can increase the likelihood of structural damage, but increasing the breathing frequency and amplitude does not present this concern or problem.
[0053] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A coal chute for preventing blockage, characterized in that, This includes the coal chute body, connecting frame, breathing mechanism, and drive mechanism; The coal chute body has several staggered connection holes for fixing the breathing mechanism, and the connecting frame has multiple holes, each of which is fixed to the connection hole. The breathing mechanism includes a pressure ring, a connecting frame, a sealing membrane, a sealing cover, and an expansion rubber plate. The connecting frame and the connecting frame are connected on the outside. The pressure ring is fixed between the connecting frame and the connecting frame. The sealing membrane is pressed between the pressure ring and the outer wall of the coal chute body. The sealing cover is fixed to the outside of the pressure ring. A breathing chamber is formed between the sealing cover and the sealing membrane. The sealing membrane is made of elastic material. The expansion rubber plate is disposed inside the coal chute body and its edge is connected to the connecting hole. The breathing mechanism has multiple connections, each of which is connected to the connection hole. The drive mechanism is connected to the breathing chamber and is used to drive the breathing chamber to expand or contract.
2. The anti-clogging coal chute according to claim 1, characterized in that, The connecting frame protrudes from the outer wall of the coal chute body.
3. The anti-clogging coal chute according to claim 1, characterized in that, The expansion rubber sheet is inlaid with a support mesh.
4. The anti-clogging coal chute according to claim 3, characterized in that, The support mesh is made of metal fiber.
5. The anti-clogging coal chute according to claim 1, characterized in that, The edge of the expanding rubber sheet is embedded into the opening of the connecting hole.
6. The anti-clogging coal chute according to claim 1, characterized in that, It also includes a heat insulation cavity, which is disposed on the side of the expansion rubber plate facing the sealing film.
7. The anti-clogging coal chute according to claim 6, characterized in that, The heat insulation cavity is filled with heat insulation board.
8. The anti-clogging coal chute according to claim 1, characterized in that, The drive mechanism includes two sets of piston mechanisms, an electromagnetic drive mechanism, an intake check valve, an exhaust pressure relief valve, and a manifold. The two sets of piston mechanisms are symmetrically arranged and connected to each other via the electromagnetic drive mechanism. The electromagnetic drive mechanism includes an iron core winding, a permanent magnet, and a push shaft. The iron core winding is arranged in a ring shape. The permanent magnet is floatingly connected to the middle of the iron core winding. The push shaft passes through and is fixed to the middle of the permanent magnet. The two ends of the push shaft are respectively fixedly connected to the piston blocks of two sets of piston mechanisms. The piston housing of the piston mechanism is connected to the intake check valve and the exhaust pressure relief valve respectively. The intake check valve is used to transfer gas into the piston housing, and the exhaust pressure relief valve is connected to each breathing chamber through the manifold. The two sets of piston mechanisms are respectively connected to two adjacent breathing chambers.
9. The anti-clogging coal chute according to claim 8, characterized in that, A limiting ring is provided on the inner wall of the front end of the piston housing to limit the floating limit of the piston block, and a gas storage gap is provided between the limiting ring and the end of the piston housing.
10. The anti-clogging coal chute according to claim 9, characterized in that, A gas volume regulating ring with an opening is also provided between the limiting ring and the end of the piston housing.