Boiler combustion anti-blocking device
By installing lining plates and vibration mechanisms on the outside of the coal chute, the problems of coal chute blockage and low safety are solved, achieving efficient anti-blockage and convenient maintenance, and improving the durability and safety of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA BAOFENG ENERGY GROUP CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-24
AI Technical Summary
In existing technologies, the unblocking structure inside the coal chute is easily damaged, hindering coal conveying, and requires personnel to enter the coal chute for maintenance, resulting in low safety.
A coal feeding anti-blocking device for boiler combustion is designed, which adopts an external liner and a vibration mechanism. The liner is driven to slide back and forth by the vibration mechanism, and the scraper scrapes off the coal slag by sticking to the surface of the liner. The vibration mechanism can be disassembled and the liner can be replaced from the outside, avoiding personnel from entering the coal feeding pipe to operate.
It effectively prevents coal chute blockage, improves equipment durability and safety, reduces maintenance workload, and ensures the safety of operators.
Smart Images
Figure CN224551574U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of coal conveying technology, and more specifically, to a boiler combustion coal feeding anti-blocking device. Background Technology
[0002] In the coal transportation process, the coal chute is a key piece of equipment for coal transfer, integrating functions such as material receiving, flow guiding, and buffering. The coal chute is prone to coal blockage, requiring manual entry into the inside of the chute for cleaning, which is a very large workload and poses risks of falling from heights and coal accumulation collapse, resulting in a low safety factor.
[0003] In response, Chinese patent application number CN201922115542.4 discloses a chute anti-blocking device. The solution mainly involves setting up a retractable actuator arm with a scraper plate inside the coal chute to scrape the inner wall of the coal chute, thereby achieving the anti-blocking effect.
[0004] However, in the process of implementing the technical solutions in the embodiments of this application, the inventors of this utility model discovered that the above-mentioned technology has at least the following technical problems:
[0005] 1. The actuator arm and shovel plate are both located inside the coal drop pipe. When they collide with the coal, they are prone to structural damage and also hinder coal conveying.
[0006] 2. When the telescopic actuator arm comes into contact with coal, coal dust can easily enter the spring gaps or other gaps, causing telescopic failure.
[0007] 3. The unblocking structure is located inside the coal chute, requiring personnel to enter the chute for maintenance, resulting in a low safety factor. Utility Model Content
[0008] To overcome the above deficiencies, this application provides a boiler combustion coal feeding anti-blockage device, which aims to improve the problems mentioned in the background art.
[0009] This application provides a boiler combustion coal feeding anti-blocking device, including a coal chuting pipe, a liner plate slidably connected at the corner of the coal chuting pipe, the upper end of the liner plate penetrating through the coal chuting pipe, a vibration mechanism detachably provided on the outer wall of the coal chuting pipe to drive the liner plate to slide back and forth, and a scraper plate movably connected to the inner wall of the coal chuting pipe, the lower end of the scraper plate abutting against the upper surface of the liner plate.
[0010] In one specific implementation, the coal chute includes a vertical pipe, a transfer pipe, and an inclined pipe, wherein the vertical pipe and the inclined pipe are fixedly connected through the transfer pipe.
[0011] In the above implementation process, the transfer pipe has high strength to facilitate the installation of the vibration mechanism and the penetration of the liner.
[0012] In one specific implementation, the liner is slidably connected to the bottom wall of the inclined tube, the upper end of the liner is movably inserted through the transition pipe, and limit strips are provided on both sides of the inclined tube to restrict the liner from sliding on the bottom wall of the inclined tube.
[0013] During the above process, the falling coal generates significant friction and impact at the liner plate. The liner plate protects the inclined tube, thereby improving durability and reducing maintenance. The vertical tube installation angle is controlled between 70° and 90°, which can effectively reduce coal blockage.
[0014] In one specific implementation, a support beam is fixedly connected to the transfer pipe, and the support beam is fixedly connected to an external frame.
[0015] In the above implementation process, the support is used to fix the coal drop pipe to the external frame to improve stability and also to provide support for the vibration mechanism.
[0016] In one specific implementation, the inclined tube is provided with a self-lubricating plate that slides and rubs against the back of the liner.
[0017] In the above implementation process, the self-lubricating plate adopts a conventional structure of copper plate inlaid with graphite dots to provide support for the liner and reduce friction.
[0018] In one specific implementation, a detachable back plate is provided on the inclined tube at a position on the back of the liner, and the self-lubricating plate is detachably embedded in the back plate.
[0019] In the above process, the self-lubricating plate can be removed and replaced by disassembling the back plate, without the need for personnel to enter the coal chute, thus improving safety. The back plate has grooves for embedding the self-lubricating plate.
[0020] In one specific implementation, the upper end of the back plate is bolted to the adapter pipe and the support beam, the inclined pipe is provided with a slot, and the lower end of the back plate is inserted into the slot.
[0021] In the above process, the lower end of the back plate is first inserted into the slot, then closed, and then fixed to the adapter pipe and support beam with bolts, thereby realizing the external disassembly of the back plate so as to replace the self-lubricating plate from the outside. It should be noted that when replacing the self-lubricating plate, since the liner is sealed at the position of the back plate, the dust leakage inside the coal chute can be reduced, thereby improving safety.
[0022] In one specific implementation, a screw is provided on the back of the scraper, and a vertical groove is provided through the side wall of the adapter pipe. The screw passes through the groove and secures the scraper to the adapter pipe.
[0023] In the above process, the scraper is tightly attached to the inner wall of the transfer pipe by screws. Under its own weight and the pressure of the falling coal on the upper surface of the scraper, the scraper is tightly attached to the surface of the liner. When the liner vibrates up and down, it can scrape off the coal slag on the surface of the liner, thereby effectively improving the sealing effect. Even if the scraper is worn, it can still stick tightly to the surface of the liner. It should be noted that due to the possible vibration of the scraper, the screws need to adopt an anti-loosening structure, such as the pin and the locking adhesive on the thread.
[0024] In one specific implementation, the vibration mechanism includes a support and a turntable. The support is fixedly connected to the transfer tube, and the turntable is rotatably connected to the support. A transverse groove is provided on the liner, and a lever is eccentrically provided on the turntable and inserted into the transverse groove.
[0025] In one specific implementation, the vibration mechanism further includes a motor mounted on the bracket, the output end of which is fixedly connected to the turntable.
[0026] In the above implementation process, the motor drives the turntable to rotate after being reduced in speed by the gearbox. The eccentrically set lever drives the liner to slide up and down, thereby shaking off the blocked coal dust. It should be noted that the motor is controlled by the controller. During normal coal feeding, the motor rotates slowly to drive the liner to vibrate. When the controller detects that the power supply current of the DC servo motor is too high for a long time, it indicates that the motor is overloaded, indicating that too much coal has accumulated and blockage may occur. In this case, the controller drives the motor to rotate faster to shake off the blocked coal. On the other hand, the bolt fixing position of the bracket on the flange of the transfer pipe is strip-shaped. When it is necessary to remove the liner, the bracket bolts can be loosened, the bracket and its vibration mechanism can be moved backward, and the liner can be pulled out by hand to check the wear of the liner or replace the liner. Similarly, no personnel need to enter the coal feeding pipe. In this embodiment, for the sake of clear illustration, there are two vibration mechanisms. The two motors are synchronized through servo control. Due to issues such as force, synchronization is difficult. In another embodiment or in actual implementation, it is better to use a single vibration mechanism.
[0027] Compared with the prior art, the beneficial effects of this application are: the upper surface of the liner is located outside the coal chute and will not be impacted by coal, which is conducive to the vibration mechanism driving the liner to vibrate up and down, thereby achieving the anti-blocking effect; the liner itself can also protect the inner wall of the coal chute; the vibration mechanism can loosen the liner, so the liner can be directly pulled out from the outside for replacement, making the operation more convenient and ensuring personal safety. Attached Figure Description
[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the boiler combustion coal feeding anti-blocking device provided in the embodiments of this application;
[0030] Figure 2 A first-view schematic diagram of the cross-sectional structure of the anti-clogging device provided in the embodiments of this application;
[0031] Figure 3 A second-view schematic diagram of the cross-sectional structure of the anti-clogging device provided in the embodiments of this application;
[0032] Figure 4 Provided for the implementation of this application Figure 3 Enlarged view of a portion of point A in the middle;
[0033] Figure 5 This is a schematic diagram illustrating the connection relationship between the self-lubricating plate and the back plate, provided for an embodiment of this application.
[0034] In the diagram: 10-coal chute; 11-vertical pipe; 12-transfer pipe; 13-inclined pipe; 14-limiting strip; 15-slot; 16-self-lubricating plate; 17-back plate; 20-liner; 30-vibration mechanism; 31-support; 32-turntable; 33-motor; 40-scraper; 41-screw; 50-support beam. Detailed Implementation
[0035] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.
[0036] Please see Figures 1-5 This application provides a coal feeding anti-blocking device for boiler combustion, including a coal chute 10. A liner 20 is slidably connected at the corner of the coal chute 10, with the upper end of the liner 20 penetrating through the coal chute 10. A vibration mechanism 30 is detachably installed on the outer wall of the coal chute 10 to drive the liner 20 to slide back and forth. A scraper 40 is also movably connected to the inner wall of the coal chute 10, with the lower end of the scraper 40 abutting against the upper surface of the liner 20. The upper surface of the liner 20 is located outside the coal chute 10, preventing it from being impacted by coal, which facilitates the vibration mechanism 30 driving the liner 20 to vibrate up and down, thus achieving an anti-blocking effect. The liner 20 itself also protects the inner wall of the coal chute 10. The vibration mechanism 30 can loosen the liner 20, allowing it to be directly pulled out and replaced from the outside, making operation more convenient and ensuring personal safety.
[0037] Please see Figures 1-5 The coal chute 10 includes a vertical pipe 11, a transfer pipe 12, and an inclined pipe 13. The vertical pipe 11 and the inclined pipe 13 are fixedly connected through the transfer pipe 12. The transfer pipe 12 has high strength to facilitate the installation of the vibration mechanism 30 and the penetration of the liner plate 20.
[0038] Please see Figures 1-5 The liner 20 is slidably connected to the bottom wall of the inclined tube 13, and the upper end of the liner 20 extends through the transition pipe 12. Limiting strips 14 are provided on both sides of the inclined tube 13, which restrict the liner 20 to slide against the bottom wall of the inclined tube 13. The falling coal generates significant friction and impact at the liner 20. The liner 20 protects the inclined tube 13, thereby improving durability and reducing maintenance. The installation angle of the vertical pipe 11 is controlled between 70° and 90°, which can effectively reduce coal blockage.
[0039] Please see Figures 1-5 A support beam 50 is fixedly connected to the transfer pipe 12, and the support beam 50 is fixedly connected to the external frame. The bracket 31 is used to fix the coal drop pipe 10 to the external frame to improve stability and also to provide support for the vibration mechanism 30.
[0040] Please see Figures 1-5 A self-lubricating plate 16 is provided on the inclined tube 13, which slides and rubs against the back of the liner 20. The self-lubricating plate 16 adopts a conventional structure of copper plate inlaid with graphite dots, which provides support for the liner 20 and reduces friction.
[0041] Please see Figures 1-5 A detachable back plate 17 is provided on the inclined tube 13 at the back of the liner 20, and a self-lubricating plate 16 is detachably embedded in the back plate 17. The self-lubricating plate 16 can be removed and replaced by disassembling the back plate 17, without personnel entering the coal drop pipe 10 for operation, which improves safety. The back plate 17 has a groove for embedding the self-lubricating plate 16.
[0042] Please see Figures 1-5 The upper end of the back plate 17 is bolted to the transfer pipe 12 and the support beam 50. The inclined pipe 13 is provided with a slot 15, and the lower end of the back plate 17 is inserted into the slot 15. The lower end of the back plate 17 is first inserted into the slot 15, then closed, and then fixed to the transfer pipe 12 and the support beam 50 by bolts, thereby realizing the external disassembly of the back plate 17, so as to facilitate the replacement of the self-lubricating plate 16 from the outside. It should be noted that when replacing the self-lubricating plate 16, since the liner 20 is sealed at the position of the back plate 17, the dust leakage inside the coal chute 10 can be reduced, thereby improving safety.
[0043] Please see Figures 1-5A screw 41 is provided on the back of the scraper 40. A vertical groove is provided through the side wall of the transfer pipe 12, and the screw 41 passes through the groove, thus securing the scraper 40 to the transfer pipe 12. The scraper 40 is tightly attached to the inner wall of the transfer pipe 12 by the screw 41. Under its own weight and the pressure of falling coal on the upper surface of the scraper 40, the scraper 40 is tightly attached to the surface of the liner 20. When the liner 20 vibrates up and down, it can scrape off the coal slag on the surface of the liner 20, thereby effectively improving the sealing effect. Even if the scraper 40 is worn, it can still be tightly attached to the surface of the liner 20. It should be noted that due to the possible vibration of the scraper 40, the screw 41 needs to adopt an anti-loosening structure, such as a pin and locking adhesive on the thread.
[0044] Please see Figures 1-5 The vibration mechanism 30 includes a support 31 and a turntable 32. The support 31 is fixedly connected to the transfer pipe 12, and the turntable 32 is rotatably connected to the support 31. A transverse groove is provided on the liner 20, and a lever is eccentrically positioned on the turntable 32 and inserted into the transverse groove. The vibration mechanism 30 also includes a motor 33, which is mounted on the support 31, and the output end of the motor 33 is fixedly connected to the turntable 32. The motor 33 drives the turntable 32 to rotate after being reduced in speed by a gearbox. The eccentrically positioned lever drives the liner 20 to slide up and down, thereby shaking off the blocked coal dust. It should be noted that the motor 33 is controlled by a controller. During normal coal feeding, the motor 33 rotates slowly to drive the liner 20 to vibrate. When the controller detects that the power supply current of the DC servo motor 33 is too high for a long time, it indicates that the motor 33 is overloaded, indicating that too much coal has accumulated and blockage may occur. In this case, the controller drives the motor 33 to accelerate its rotation to shake off the blocked coal. On the other hand, the support 31 is fixed to the flange of the transfer pipe 12. The bolt fixing position is strip-shaped. When it is necessary to remove the liner 20, the bolts of the bracket 31 can be loosened, the bracket 31 and its vibration mechanism 30 can be moved backward, and the liner 20 can be removed by hand to check the wear of the liner 20 or replace the liner 20. Similarly, no personnel need to enter the coal drop pipe 10. In this embodiment, for the sake of clear illustration, there are two vibration mechanisms 30. The two motors 33 are synchronized through servo control. Due to issues such as force, synchronization is difficult. In another embodiment or in actual implementation, it is better to use one vibration mechanism 30.
[0045] The working principle of the coal feeding anti-blocking device in this boiler is as follows: During normal coal feeding, the motor 33 slowly rotates to drive the liner 20 to vibrate. The scraper 40 is tightly attached to the inner wall of the transfer pipe 12 by screws 41. Under its own weight and the pressure of the falling coal on the upper surface of the scraper 40, the scraper 40 is tightly attached to the surface of the liner 20. When the liner 20 vibrates up and down, it can scrape off the coal slag on the surface of the liner 20, thereby effectively improving the sealing effect. Even if the scraper 40 is worn, it can still stick tightly to the surface of the liner 20. When the controller detects that the power supply current of the DC servo motor 33 is too high for a long time, it indicates that the motor 33 is overloaded, indicating that too much coal has accumulated and blockage may occur. Then the motor 33 is driven to accelerate rotation to shake off the blocked coal. During boiler equipment maintenance or other necessary times, the back plate 17 can be removed to replace the self-lubricating plate 16, or the vibration mechanism 30 can be loosened and the liner 20 can be pulled out upwards for maintenance.
[0046] In summary, the upper surface of the liner 20 is located outside the coal chute 10 and will not be impacted by coal, which is conducive to the vibration mechanism 30 driving the liner 20 to vibrate up and down, thereby achieving the effect of preventing blockage. The liner 20 itself can also protect the inner wall of the coal chute 10. The vibration mechanism 30 can loosen the liner 20, so that the liner 20 can be directly pulled out from the outside for replacement, making the operation more convenient and ensuring personal safety.
[0047] The motor 33 and ammeter, among other execution and detection devices involved in this application, are automatically controlled using a Siemens S7-1200 series PLC. The patent specification fully discloses its control logic; those skilled in the art can implement the corresponding control program using ladder diagrams or structured text programming languages based on the logical relationships. The related equipment is connected according to the IEC 61131-2 electrical standard, which is a common connection technology in the field of automation; therefore, redundant descriptions are not provided.
[0048] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, improvements, or equivalent substitutions made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
Claims
1. A boiler combustion coal feeding anti-blocking device, characterized in that, The device includes a coal chute (10), a liner (20) is slidably connected at the corner of the coal chute (10), the upper end of the liner (20) passes through the coal chute (10), a vibration mechanism (30) is detachably provided on the outer wall of the coal chute (10) to drive the liner (20) to slide back and forth, and a scraper (40) is movably connected to the inner wall of the coal chute (10), the lower end of the scraper (40) abuts against the upper surface of the liner (20).
2. The boiler combustion coal feeding anti-blocking device according to claim 1, characterized in that, The coal chute (10) includes a vertical pipe (11), a transfer pipe (12), and an inclined pipe (13), and the vertical pipe (11) and the inclined pipe (13) are fixedly connected through the transfer pipe (12).
3. The boiler combustion coal feeding anti-blocking device according to claim 2, characterized in that, The liner (20) is slidably connected to the bottom wall of the inclined tube (13). The upper end of the liner (20) is movably inserted through the adapter tube (12). Limiting strips (14) are provided on both sides of the inclined tube (13). The limiting strips (14) restrict the liner (20) to slide on the bottom wall of the inclined tube (13).
4. The boiler combustion coal feeding anti-blocking device according to claim 3, characterized in that, A support beam (50) is fixedly connected to the transfer pipe (12), and the support beam (50) is fixedly connected to the external frame.
5. A boiler combustion coal feeding anti-blocking device according to claim 4, characterized in that, The inclined tube (13) is provided with a self-lubricating plate (16) that slides and rubs against the back of the liner (20).
6. A boiler combustion coal feeding anti-blocking device according to claim 5, characterized in that, A detachable back plate (17) is provided on the inclined tube (13) at the position on the back of the liner (20), and the self-lubricating plate (16) is detachably embedded in the back plate (17).
7. A boiler combustion coal feeding anti-blocking device according to claim 6, characterized in that, The upper end of the back plate (17) is bolted to the adapter pipe (12) and the support beam (50), and the inclined pipe (13) is provided with a slot (15), and the lower end of the back plate (17) is inserted into the slot (15).
8. A boiler combustion coal feeding anti-blocking device according to claim 7, characterized in that, The scraper (40) has a screw (41) on its back side. The adapter pipe (12) has a vertical groove through which a sliding groove is opened. The screw (41) passes through the sliding groove and the screw (41) tightens the scraper (40) onto the adapter pipe (12).
9. A boiler combustion coal feeding anti-blocking device according to claim 8, characterized in that, The vibration mechanism (30) includes a bracket (31) and a turntable (32). The bracket (31) is fixedly connected to the adapter pipe (12), and the turntable (32) is rotatably connected to the bracket (31). A horizontal groove is provided on the liner (20), and a lever is eccentrically provided on the turntable (32) and inserted into the horizontal groove.
10. A boiler combustion coal feeding anti-blocking device according to claim 9, characterized in that, The vibration mechanism (30) also includes a motor (33), which is mounted on the bracket (31) and the output end of the motor (33) is fixedly connected to the turntable (32).