A mixing device for accurate proportioning of coal into a furnace

Abstract

The utility model relates to the field of coal processing and conversion, and disclose a kind of for furnace coal precision batching mixing equipment, including mixing cavity, conducting motor, transmission motor, support ring, bunker, discharging pipeline, pneumatic arch breaker, omron photoelectric sensor, shield disc, secondary gear, main gear, stirring assembly and other structures, bunker is fixed by support ring, inside is separated into multiple groups of discharging pipeline by partition;Transmission motor drives main gear rotation, engages secondary gear and drives shield disc rotation, makes discharging port and corresponding discharging pipeline butt joint;Conducting motor controls shield block to adjust discharging port opening and closing, can component coal discharging, omron photoelectric sensor monitors discharging state, pneumatic arch breaker solves pipeline blockage problem, stirring assembly then makes coal mixture uniform, the utility model structure is compact and reasonable, batching error is small, can effectively reduce fault shutdown, improve furnace coal batching efficiency, make coal processing stable, applicable to power, steel and other need furnace coal batching field.

Description

Technical Field

[0001] This utility model relates to the field of coal processing and conversion, specifically a mixing device for precise batching of coal for furnace feeding. Background Technology

[0002] In the field of coal utilization, precise batching of coal for furnace feeding is crucial for improving coal combustion efficiency, ensuring product quality, and reducing production costs. Various industries, such as power, steel, and chemical industries, all use coal as an important raw material. However, the quality of coal varies, and a single type of coal often cannot meet the requirements of production processes. Through precise batching, multiple types of coal can be mixed in a specific ratio, so that the coal fed into the furnace has suitable indicators such as calorific value, volatile matter, and sulfur content, achieving efficient utilization of coal resources and reducing pollutant emissions, which meets environmental protection requirements. Therefore, precise batching is a key link in the efficient and clean utilization of coal.

[0003] Traditional coal batching technology has many drawbacks. The process relies heavily on manual experience and judgment, lacking precise quantitative analysis and scientific proportioning. This leads to large fluctuations in the composition of the coal, making it difficult to consistently meet the stringent coal quality requirements of production. Some small coking plants still use traditional methods, determining the batching scheme based on simple indicators such as volatile matter and caking index. When the coal source is complex or its quality fluctuates, it becomes impossible to accurately control coke quality, resulting in a higher defect rate. Furthermore, traditional batching equipment is rudimentary, resulting in uneven mixing, material agglomeration, and stratification, reducing coal combustion efficiency and increasing energy consumption and production costs. Moreover, traditional technology cannot monitor and adjust the batching process in real time, making it difficult to react promptly to sudden changes in coal quality or production conditions, severely hindering the improvement of production efficiency and product quality. Therefore, we propose a mixing device for precise coal batching in the furnace. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a mixing device for precise batching of coal for furnace operation, thus solving the aforementioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] A mixing device for precise batching of coal for furnace feeding includes a mixing chamber, a conducting motor, a drive motor, a support ring, and a hopper. The mixing chamber is a cylindrical structure with four columns, and a support beam is fixedly installed on the top of the mixing chamber. The conducting motor is fixedly installed at the center of the top of the support beam of the mixing chamber. The drive motor is fixedly installed on the side of the top of the support beam of the mixing chamber corresponding to the conducting motor. A circular support ring is fixedly installed between the four columns in the middle of the mixing chamber. The hopper is fixedly installed on the inner side wall of the support ring.

[0007] A feeding assembly is installed at the bottom of the silo. The feeding assembly includes a transmission structure, a rotation structure, and a mixing structure. The transmission structure is installed on the bottom surface of the silo. The rotation structure is installed inside the meshing structure and connected to the conducting motor. The mixing structure is installed on the bottom surface of the transmission structure and is used to stir the coal fed into the furnace.

[0008] An auxiliary feeding component is installed inside the silo, which is a hollow frustum-shaped silo with a cross-shaped partition fixedly installed inside. The partition divides the internal space of the silo into multiple sets of feeding pipes, and the auxiliary feeding component is installed on the side wall of the feeding pipes.

[0009] Preferably, the top of the crossbeam of the mixing bin has a through hole, and the two sets of through holes are equidistantly distributed laterally. The top of the hopper has a through hole, and the diameter of the through hole is equal to the diameter of the through hole. The four sets of discharge pipes are equidistantly distributed in a ring, and the top and bottom of the discharge pipes are provided with openings. The inside of the discharge pipe is funnel-shaped.

[0010] Preferably, the auxiliary feeding assembly includes a pneumatic arch breaker and an Omron photoelectric sensor. The pneumatic arch breaker is fixedly installed on the side wall of the feeding pipe, and four sets of pneumatic arch breaker are distributed in a ring at equal intervals. An Omron photoelectric sensor is fixedly installed on the side wall of the funnel-shaped outlet at the bottom of the feeding pipe, and four sets of Omron photoelectric sensors are distributed in a ring at equal intervals.

[0011] Preferably, the transmission structure includes a shielding plate, a rotating groove, and a discharge port. The shielding plate is a hollow disc, and a circular rotating groove is formed on the top surface of the shielding plate. The diameter of the rotating groove is equal to the bottom diameter of the hopper, and the rotating groove is rotatably connected to the bottom of the hopper. A through discharge port is formed on the top of the shielding plate, and the size of the discharge port is equal to the bottom outlet size of the discharge pipe.

[0012] Preferably, the mixing structure includes a secondary gear, a primary gear, and a stirring assembly. The secondary gear is fixedly installed on the side of the shielding plate. A rotating shaft is fixedly installed at the top center of the primary gear, and the end of the rotating shaft opposite to the primary gear is fixedly installed on the motor shaft of the transmission motor. The rotating shaft of the primary gear is rotatably connected to the through hole, and the primary gear is meshed with the secondary gear. The stirring assembly is fixedly installed at the bottom center of the shielding plate.

[0013] Preferably, the rotating structure includes a rotating groove, a blocking block, and a rotating rail. The inner sidewall of the blocking plate has a dovetail-shaped rotating groove, and a cylindrical limiting post is fixedly installed on the inner top surface of the blocking plate. A blind hole is opened at the center of the top of the blocking plate. The blocking block is fan-shaped and its size is equal to the size of the discharge port. A dovetail-shaped rotating rail is fixedly installed on the round side of the blocking block, and the rotating rail is rotatably connected to the rotating groove. The blocking block is rotatably connected to the internal space of the blocking plate. A bearing post is fixedly installed at the center of the top of the blocking block, and the end of the bearing post facing away from the blocking block is fixedly installed on the motor shaft of the conducting motor. The bearing post of the blocking block is rotatably connected to the through hole at the center of the top of the mixing bin beam and the blind hole at the top of the blocking plate.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] A mixing device for precise batching of coal for furnace feeding is provided, which has the following beneficial effects:

[0016] 1. This mixing equipment for precise batching of coal for furnace feeding uses a motor to control the rotation of the baffle block, adjusting the opening and closing of the feed inlet. This allows for the regulation of the feed amount of each coal component. Simultaneously, the drive motor drives the baffle plate to rotate stably, connecting the feed inlet with the feed pipe. Combined with Omron photoelectric sensors to monitor the feeding status in real time, the system immediately responds and adjusts if the feed amount deviates from the preset value, ensuring stable coal combustion or processing and laying a solid foundation for producing high-quality products. Furthermore, the pneumatic arch breaker installed on the side wall of the feed pipe can instantly release a powerful impact force to break up any arching blockages in the coal. The Omron photoelectric sensor monitors the material flow at the feed inlet in real time. If a feeding interruption or abnormal flow is detected, a signal is immediately sent back, first activating the pneumatic arch breaker to attempt unblocking. If the fault persists, the faulty feed pipe is located for quick repair by staff, reducing material jams, effectively lowering the failure rate, ensuring continuous and stable operation of the coal batching process, significantly reducing downtime due to equipment failure, and improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the shielding disc of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-section of this utility model;

[0020] Figure 4 This is a cross-sectional view of the present invention.

[0021] In the diagram: 1. Mixing chamber; 2. Conducting motor; 3. Drive motor; 4. Support ring; 5. Hopper; 6. Discharge pipe; 7. Through hole; 8. Pneumatic arch breaker; 9. Omron photoelectric sensor; 10. Baffle plate; 11. Rotary trough; 12. Discharge port; 13. Secondary gear; 14. Main gear; 15. Mixing assembly; 16. Rotating trough; 17. Baffle block; 18. Rotating rail. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 A mixing device for precise batching of coal for furnace feeding includes a mixing chamber 1, a conducting motor 2, a transmission motor 3, a support ring 4, and a hopper 5. The mixing chamber 1 is a cylindrical structure with four columns, and a support-type crossbeam is fixedly installed on the top of the mixing chamber 1. The conducting motor 2 is fixedly installed at the center of the top of the support of the mixing chamber 1. The transmission motor 3 is fixedly installed on the side of the top of the support of the mixing chamber 1 corresponding to the conducting motor 2. A circular support ring 4 is fixedly installed between the four columns in the middle of the mixing chamber 1. The hopper 5 is fixedly installed on the inner side wall of the support ring 4.

[0024] The feeding assembly is located at the bottom of the hopper 5. The feeding assembly includes a transmission structure, a rotating structure and a mixing structure. The transmission structure is located on the bottom surface of the hopper 5. The rotating structure is located inside the meshing structure and connected to the conducting motor 2. The mixing structure is located on the bottom surface of the transmission structure and is used to stir the coal fed into the furnace.

[0025] An auxiliary feeding component is installed inside the hopper 5. The hopper 5 is a hollow frustum shape, and a cross-shaped partition is fixedly installed inside the hopper 5. The partition divides the internal space of the hopper 5 into multiple sets of feeding pipes 6. The auxiliary feeding component is installed on the side wall of the feeding pipes 6.

[0026] Furthermore, the top of the crossbeam of the mixing bin 1 has a through hole 7, and the two sets of through holes 7 are distributed horizontally at equal intervals. The top of the hopper 5 has a through hole, and the diameter of the through hole is equal to the diameter of the through hole 7. The four sets of discharge pipes 6 are distributed in a ring at equal intervals, and the top and bottom of the discharge pipes 6 are provided with openings. The inside of the discharge pipes 6 is funnel-shaped.

[0027] Furthermore, the auxiliary feeding components include a pneumatic arch breaker 8 and an Omron photoelectric sensor 9. The pneumatic arch breaker 8 is fixedly installed on the side wall of the feeding pipe 6, and four sets of pneumatic arch breaker 8 are distributed in a ring at equal intervals. The Omron photoelectric sensor 9 is fixedly installed on the side wall of the funnel-shaped outlet at the bottom of the feeding pipe 6, and four sets of Omron photoelectric sensors 9 are distributed in a ring at equal intervals. The pneumatic arch breaker 8 adopts a pulse jet design, which breaks the arch bridge formed by the compression of coal in the feeding pipe 6 by the impact force generated by the instantaneous release of compressed air, thus preventing blockage. The Omron photoelectric sensor 9 is installed on the side of the bottom outlet of the feeding pipe 6, and can monitor the flow status of coal at the feeding port 12 in real time. When the sensor detects that the coal feeding is interrupted, it will immediately send a signal to the control system to trigger the pneumatic arch breaker 8 to work and clear the blockage. If an abnormal coal flow is detected, a signal is fed back to the drive motor 3 to adjust the rotation speed of the baffle plate 10.

[0028] Furthermore, the transmission structure includes a shielding plate 10, a rotating groove 11, and a discharge port 12. The shielding plate 10 is a hollow disc, and a circular rotating groove 11 is opened on the top surface of the shielding plate 10. The diameter of the rotating groove 11 is equal to the bottom diameter of the hopper 5, and the rotating groove 11 is rotatably connected to the bottom of the hopper 5. A through discharge port 12 is opened on the top of the shielding plate 10, and the size of the discharge port 12 is equal to the bottom outlet size of the discharge pipe 6. The shielding plate 10 adopts a double-layer structure. The inner layer is provided with a wear-resistant sealing ring at the joint with the rotating groove 11 at the bottom of the hopper 5 to reduce rotational friction and prevent coal dust leakage. The inner wall of the rotating groove 11 is polished to reduce the friction coefficient between coal particles and the groove wall, so that the shielding plate 10 rotates smoothly. The edge of the discharge port 12 is chamfered to prevent coal from being blocked at the outlet and causing interruption of discharge. By rotating the shielding plate 10, the different discharge pipes 6 and the discharge port 12 are alternately connected to complete the sequential discharge of multi-component coal.

[0029] Furthermore, the mixing structure includes a secondary gear 13, a primary gear 14, and a stirring assembly 15. The secondary gear 13 is fixedly mounted on the side of the baffle plate 10. A rotating shaft is fixedly mounted at the top center of the primary gear 14, and the end of the rotating shaft facing away from the primary gear 14 is fixedly mounted on the motor shaft of the drive motor 3. The rotating shaft of the primary gear 14 is rotatably connected to the through hole 7, and the primary gear 14 meshes with the secondary gear 13. The stirring assembly 15 is fixedly mounted at the bottom center of the baffle plate 10. The primary gear 14 is connected to the drive motor 3 via the rotating shaft, and the secondary gear 13 is fixed to the side of the baffle plate 10. The meshing of the two drives the drive motor 3... Rotational power is stably transmitted to the shielding plate 10, and the gear transmission has high transmission efficiency and precise transmission ratio, avoiding fluctuations in the rotational speed of the shielding plate 10 due to power transmission loss. Lubricant can be added to the gear meshing points regularly to reduce gear wear and extend service life. The stirring component 15 is fixed to the center of the bottom surface of the shielding plate 10 and rotates synchronously with the shielding plate 10, so that the coal falling from the feed port 12 is immediately stirred when it enters the bottom of the mixing chamber 1, avoiding uneven mixing caused by coal accumulation and subsequent stirring. At the same time, the stirring process can break up lumps of coal, further improving the uniformity of the coal entering the furnace and providing high-quality raw materials for subsequent combustion or processing.

[0030] Furthermore, the rotating structure includes a rotating groove 16, a blocking block 17, and a rotating rail 18. The inner sidewall of the blocking disk 10 has a dovetail-shaped rotating groove 16, and a cylindrical limiting post is fixedly installed on the top surface of the blocking disk 10. A blind hole is opened at the center of the top of the blocking disk 10. The blocking block 17 is a fan-shaped block, and its size is equal to the size of the discharge port 12. A dovetail-shaped rotating rail 18 is fixedly installed on the rounded side of the blocking block 17, and the rotating rail 18 is rotatably connected to the rotating groove 16. 17 is rotatably connected to the internal space of the shielding plate 10. A bearing column is fixedly installed at the top center of the shielding block 17, and the end of the bearing column opposite to the shielding block 17 is fixedly installed on the motor shaft of the conducting motor 2. The bearing column of the shielding block 17 is rotatably connected to the through hole 7 at the center of the top of the crossbeam of the mixing chamber 1 and the blind hole at the top of the shielding plate 10. The dovetail structure of the rotating groove 16 cooperates with the rotating rail 18 to limit the vertical position of the shielding block 17, preventing the shielding block 17 from moving up and down during rotation, so that the shielding block 17 can be shielded. Block 17 always remains on the same plane as the discharge port 12 of the shielding plate 10 to avoid incomplete or excessive shielding due to positional misalignment. The rotating groove 16 is opened on the inner side wall of the shielding plate 10 to prevent coal dust from entering the groove and affecting the rotation. At the same time, the groove wall is smoothed to reduce frictional resistance with the rotating rail 18. The fan-shaped block structure of the shielding block 17 is the same size as the discharge port 12 and can be opened by rotating to shield the discharge port 12. The bearing column at the top is fixed to the motor shaft of the conducting motor 2 and is connected to the through hole of the crossbeam of the mixing chamber 1. 7. The blind hole of the shielding plate 10 is rotated and engaged. The rotation of the shielding block 17 can be controlled by the forward rotation of the motor 2, thereby quickly switching the shielding state. The dovetail structure of the rotating rail 18 and the rotating groove 16 not only transmit rotational power, but also disperse the radial force generated when the shielding block 17 rotates, so as to avoid the shielding block 17 from deforming due to uneven force. At the same time, the length of the rotating rail 18 is adapted to the rotating groove 16, which can limit the rotation angle of the shielding block 17 and prevent excessive rotation from causing the shielding block 17 to collide with the internal structure of the shielding plate 10.

[0031] Structural Description:

[0032] Mixing Chamber 1: This is the core area for material mixing. The coal fed into the furnace is thoroughly mixed here by the stirring component 15, so that the different components are evenly mixed.

[0033] Conducting motor 2: The conducting motor 2 is installed on the top of the mixing chamber 1 and is connected to the blocking block 17 through the motor shaft. It can drive the blocking block 17 to rotate and control the opening and blocking of the discharge port 12.

[0034] Drive motor 3: Drive motor 3 is fixed on the top of the support of mixing chamber 1. Through the meshing of main gear 14 and auxiliary gear 13, it drives the shielding plate 10 to rotate, so that the discharge port 12 connects with different discharge pipes 6.

[0035] Support ring 4: The support ring 4 is fixed in the middle of the mixing bin 1 and is in the shape of a ring. It is used to support and fix the bin 5, so as to stabilize the bin 5 and provide a support structure for material storage.

[0036] Bin 5: Bin 5 is located inside the support ring 4. It is frustum-shaped and hollow inside. It is divided into multiple sets of feeding pipes 6 by partitions. It is used to store different groups of coal entering the furnace and is a component for temporary material storage.

[0037] Discharge pipe 6: Discharge pipe 6 is a material conveying channel in silo 5. Its top is connected to the space of silo 5, and its bottom is in conjunction with shielding plate 10 to guide the material to fall to discharge port 12.

[0038] Through hole 7: Through hole 7 is opened at the top of the crossbeam of mixing chamber 1. One set of bearing columns for conducting motor 2 passes through, and one set of rotating shaft for driving motor 3 passes through, ensuring the transmission of motor power.

[0039] Pneumatic arch breaker 8: The pneumatic arch breaker 8 is installed on the side wall of the discharge pipe 6. It uses pulse jet to break the arch bridge formed by the material, prevent the discharge pipe 6 from being blocked, and ensure smooth material discharge.

[0040] Omron photoelectric sensor 9: The Omron photoelectric sensor 9 is installed on the side of the bottom outlet of the feeding pipe 6 to monitor the material flow. When the feeding is interrupted or the flow is abnormal, it will send a feedback signal to regulate the operation of the equipment.

[0041] Baffle plate 10: The baffle plate 10 is located at the bottom of the hopper 5 and is disc-shaped. The rotating groove 11 on the top surface is rotatably engaged with the bottom of the hopper 5. By rotating, the discharge port 12 is connected to different discharge pipes 6 to control the material discharge.

[0042] Rotary groove 11: Rotary groove 11 is formed on the top surface of shielding plate 10, and is in the shape of a ring. Its diameter is adapted to the bottom of hopper 5 and is rotatably connected to the bottom of hopper 5 to ensure that shielding plate 10 rotates smoothly.

[0043] Discharge port 12: The discharge port 12 is located on the top of the baffle plate 10 and is the same size as the bottom outlet of the discharge pipe 6. It is the necessary passage for materials to enter the mixing chamber from the hopper 5.

[0044] Secondary gear 13: The secondary gear 13 is fixed on the side of the shielding disk 10 and meshes with the main gear 14. It receives the power transmitted by the drive motor 3 through the main gear 14 and drives the shielding disk 10 to rotate.

[0045] Main gear 14: The top shaft of the main gear 14 is connected to the transmission motor 3 and meshes with the auxiliary gear 13, transmitting the power of the transmission motor 3 to the auxiliary gear 13 to drive the shielding disk 10;

[0046] Stirring component 15: The stirring component 15 is installed at the center of the bottom surface of the baffle plate 10 and rotates with the baffle plate 10 to stir the material entering the mixing chamber and make it evenly mixed;

[0047] Rotating groove 16: The rotating groove 16 is located on the inner side wall of the shielding disk 10, and is dovetail-shaped. It cooperates with the rotating rail 18 of the shielding block 17 to guide the shielding block 17 to rotate.

[0048] Blocking block 17: Blocking block 17 is fan-shaped and rotates along rotating groove 16 under the drive of motor 2 to control the opening and closing of feeding port 12 and adjust material feeding.

[0049] Rotating rail 18: The rotating rail 18 is fixed to the side of the round end of the blocking block 17. It is dovetail shaped and cooperates with the rotating groove 16 to transmit rotational power and ensure the stable rotation of the blocking block 17.

[0050] Working principle: First, coal enters the hopper, and the drive motor 3 starts, driving the main gear 14 to rotate. The main gear 14 meshes with the auxiliary gear 13, thereby driving the baffle plate 10 to rotate. This causes the discharge port 12 on the baffle plate 10 to rotate to the discharge pipe 6 of the corresponding component material. At the same time, the conduction motor 2 starts, driving the baffle block 17 to rotate along the rotating groove 16 inside the baffle plate 10, causing the baffle block 17 to be misaligned with the discharge port 12, thus opening the discharge port 12. At this time, the component material can smoothly fall from the discharge pipe 6 through the opened discharge port 12 into the mixing chamber of the mixing bin 1. After the single component material is discharged, the conduction motor 2 reverses, and the baffle block 17 returns to its original position. Because a cylindrical limiting column is fixedly installed inside the baffle plate 10, the baffle block... When the stop block 17 blocks the discharge port 12, it cannot continue to reverse. The drive motor 3 drives the shielding plate 10 to rotate again, blocking the previously corresponding discharge pipe 6. Then it rotates to the discharge pipe 6 of another component material to discharge the next component material related to the conduction motor 2. During this process, an Omron photoelectric sensor 9 is installed in the discharge pipe 6 at the position corresponding to the shielding plate 10. If a discharge pipe 6 malfunctions, the material will block the light path of the photoelectric detection. The equipment can locate the faulty pipe based on the signal feedback from the photoelectric detection and start the pneumatic arch breaker to clear it. If it still does not work, it is convenient for the staff to carry out maintenance to ensure the continuous and stable operation of the coal feeding operation and effectively avoid the situation of adding more of a component material due to the failure of a certain feeding device.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mixing device for precise batching of coal for furnace feeding, characterized in that, include: The mixing chamber (1), the conducting motor (2), the transmission motor (3), the support ring (4), and the hopper (5) are as follows: the mixing chamber (1) is a cylindrical structure with four columns, and a crossbeam in the form of a bracket is fixedly installed on the top of the mixing chamber (1). The conducting motor (2) is fixedly installed at the center of the top of the bracket of the mixing chamber (1). The transmission motor (3) is fixedly installed on the side of the top of the bracket of the mixing chamber (1) corresponding to the conducting motor (2). A ring-shaped support ring (4) is fixedly installed between the four columns in the middle of the mixing chamber (1). The hopper (5) is fixedly installed on the inner side wall of the support ring (4). The feeding assembly is set at the bottom of the hopper (5). The feeding assembly includes a transmission structure, a rotation structure and a mixing structure. The transmission structure is set at the bottom surface of the hopper (5). The rotation structure is set inside the meshing structure and connected to the conducting motor (2). The mixing structure is set at the bottom surface of the transmission structure and is used to stir the coal fed into the furnace. An auxiliary feeding component is installed inside the hopper (5). The hopper (5) is a hollow frustum shape, and a cross-shaped partition is fixedly installed inside the hopper (5). The partition divides the internal space of the hopper (5) into multiple sets of feeding pipes (6). The auxiliary feeding component is installed on the side wall of the feeding pipes (6).

2. The mixing equipment for precise batching of coal for furnace feeding according to claim 1, characterized in that, The top of the crossbeam of the mixing bin (1) has a through hole (7) and two sets of through holes (7) are equidistant in the horizontal direction. The top of the hopper (5) has a through hole and the diameter of the through hole is equal to the diameter of the through hole (7). The four sets of discharge pipes (6) are equidistant in the ring and the top and bottom of the discharge pipes (6) are open. The inside of the discharge pipes (6) is funnel-shaped.

3. A mixing device for precise batching of coal for furnace feeding according to claim 2, characterized in that, The auxiliary feeding assembly includes a pneumatic arch breaker (8) and an Omron photoelectric sensor (9). The pneumatic arch breaker (8) is fixedly installed on the side wall of the feeding pipe (6), and the four sets of pneumatic arch breakers (8) are distributed in a ring at equal intervals. The Omron photoelectric sensor (9) is fixedly installed on the side wall of the funnel-shaped outlet at the bottom of the feeding pipe (6), and the four sets of Omron photoelectric sensors (9) are distributed in a ring at equal intervals.

4. A mixing device for precise batching of coal for furnace feeding according to claim 1, characterized in that, The transmission structure includes a shielding plate (10), a rotating groove (11), and a discharge port (12). The shielding plate (10) is a hollow disc, and a rotating groove (11) in the shape of an annular ring is opened on the top surface of the shielding plate (10). The diameter of the rotating groove (11) is equal to the bottom diameter of the hopper (5), and the rotating groove (11) is rotatably connected to the bottom of the hopper (5). A through discharge port (12) is opened on the top of the shielding plate (10), and the size of the discharge port (12) is equal to the bottom outlet size of the discharge pipe (6).

5. A mixing device for precise batching of coal for furnace feeding according to claim 4, characterized in that, The mixing structure includes a secondary gear (13), a main gear (14), and a stirring assembly (15). The secondary gear (13) is fixedly installed on the side of the shielding disk (10). A rotating shaft is fixedly installed at the top center of the main gear (14), and the end of the rotating shaft away from the main gear (14) is fixedly installed on the motor shaft of the transmission motor (3). The rotating shaft of the main gear (14) is rotatably connected to the through hole (7), and the main gear (14) is meshed with the secondary gear (13). The stirring assembly (15) is fixedly installed at the bottom center of the shielding disk (10).

6. A mixing device for precise batching of coal for furnace feeding according to claim 5, characterized in that, The rotating structure includes a rotating groove (16), a blocking block (17), and a rotating rail (18). The inner sidewall of the blocking plate (10) has a dovetail-shaped rotating groove (16), and a cylindrical limiting post is fixedly installed on the top surface of the blocking plate (10). A blind hole is opened at the center of the top of the blocking plate (10). The blocking block (17) is a fan-shaped block, and its size is equal to the size of the discharge port (12). A dovetail-shaped limiting post is fixedly installed on the rounded side of the blocking block (17). The rotating rail (18) is rotatably connected to the rotating groove (16). The shielding block (17) is rotatably connected to the internal space of the shielding disk (10). A bearing column is fixedly installed at the top center of the shielding block (17), and one end of the bearing column away from the shielding block (17) is fixedly installed on the motor shaft of the conducting motor (2). The bearing column of the shielding block (17) is rotatably connected to the through hole (7) at the center of the top of the beam of the mixing chamber (1) and the blind hole at the top of the shielding disk (10).

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