A rotary nozzle for a coal mill

Abstract

The utility model relates to coal mill component technical field, specifically is a kind of coal mill rotary nozzle, including static ring, baffle ring, fixed disc and moving ring, the inside of static ring is close to the bottom and is provided with moving ring, the bottom of moving ring is provided with vane, annular groove is set up in the top of moving ring close to center edge, the inside bottom of moving ring is through and is provided with air inlet hole;The top of moving ring is close to the edge and is connected with annular boss, the top of annular boss is provided with inclined surface, the inner wall of static ring is close to the upper end of moving ring and is fixed with baffle ring by second bolt, the bottom of baffle ring is attached to the top of inclined surface;Greatly reduce the possibility that coal material is easy to enter the gap between moving ring and static ring, and the baffle ring is disassembled, it is easy to clean and maintain the position between moving ring and static ring and easily blocked.

Description

Technical Field

[0001] This utility model relates to the technical field of coal mill components, specifically to a rotary nozzle for a coal mill. Background Technology

[0002] A rotary nozzle for coal mills is a special nozzle design typically used in medium-speed coal mills in thermal power plants. This type of nozzle consists of a stationary ring and a rotating ring. Multiple blades are installed on the rotating ring. When the rotating ring rotates, the rotational force generated by the blades causes the gas or liquid ejected from the nozzle to rotate, thereby increasing the momentum and range of the gas and enabling it to grind coal powder more effectively.

[0003] In the past, coal could easily get into the gap between the rotating and stationary rings of rotary nozzles, causing blockages, and there was no structure that could easily clean the blockages when they occurred. Summary of the Invention

[0004] To address the problems in the existing technology, this utility model provides a rotary nozzle for a coal mill, which prevents coal from entering the gap between the moving ring and the stationary ring and causing blockage, and has a structure that allows for easy cleaning of the blockage when it occurs.

[0005] The technical solution adopted by this utility model to solve its technical problem is a rotary nozzle for a coal mill, including a stationary ring, a retaining ring, a fixed disc and a moving ring. The moving ring is provided on the inner side of the stationary ring near the bottom. The bottom of the moving ring is provided with blades. The top of the moving ring is provided with an annular groove near the center edge. An air inlet hole is provided through the bottom of the moving ring.

[0006] The top of the moving ring is connected to an annular protrusion near the edge, and the top of the annular protrusion is provided with an inclined surface. The inner wall of the stationary ring is fixed with a retaining ring near the upper end of the moving ring by a second bolt, and the bottom of the retaining ring is attached to the top of the inclined surface.

[0007] By adopting the above technical solution, since the top of the annular protrusion is provided with an inclined surface, the retaining ring is installed on the inner wall of the stationary ring, and the bottom end of the retaining ring is attached to the top of the inclined surface. Since the inclined surface is set to be inclined, the possibility of coal material easily entering the gap between the moving ring and the stationary ring is greatly reduced. Furthermore, by loosening the second bolt, the retaining ring can be easily disassembled, thereby facilitating the cleaning and maintenance of the easily blocked position between the moving ring and the stationary ring.

[0008] Specifically, a first bolt is provided near the top of the inner wall of the stationary ring through a threaded hole.

[0009] Specifically, a sealing ring is provided on the outer wall of the stationary ring near the bottom end via a slot.

[0010] Specifically, a connecting plate is fixed to the top of the moving ring near the center by a third bolt, a connecting shaft is connected to the top of the connecting plate near the center, and a driven bevel gear is provided around the connecting shaft.

[0011] By adopting the above technical solution, a motor is also installed inside the coal mill. The output end of the motor is connected to a driving bevel gear corresponding to the driven bevel gear. When the motor is working, it can drive the driving bevel gear to rotate, thereby causing the driven bevel gear and the connecting shaft to rotate, which in turn drives the rotating ring and blades to rotate.

[0012] Specifically, a sleeve block is provided at the bottom of the fixed plate, and a bearing is installed at the bottom of the sleeve block through a reserved groove, with the top of the connecting shaft located inside the bearing.

[0013] Specifically, a fourth bolt is provided at the bottom of the fixed plate near the edge via a threaded groove.

[0014] The beneficial effects of this utility model are:

[0015] The rotary nozzle for a coal mill described in this utility model has an inclined surface, which greatly reduces the possibility of coal easily entering the gap between the moving ring and the stationary ring. Furthermore, by loosening the second bolt, the retaining ring can be easily disassembled, thereby facilitating the cleaning and maintenance of the easily clogged area between the moving ring and the stationary ring. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

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

[0018] Figure 2 This is a schematic diagram of the overall structure of the stationary ring, retaining ring, and moving ring of this utility model after cross-section.

[0019] Figure 3 This is a bottom view of the structure of this utility model.

[0020] In the diagram: 1. Stationary ring; 2. First bolt; 3. Second bolt; 4. Retaining ring; 5. Sealing ring; 6. Annular groove; 7. Air inlet; 8. Third bolt; 9. Connecting plate; 10. Connecting shaft; 11. Driven bevel gear; 12. Fixed plate; 13. Fourth bolt; 14. Blade; 15. Moving ring; 16. Annular protrusion; 17. Sleeve block; 18. Bearing; 19. Inclined surface. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] To prevent coal from entering and clogging the gap between the moving and stationary rings, and to facilitate cleaning of the clogged area when it occurs, such as... Figure 1-3 As shown, the rotary nozzle of a coal mill according to this utility model includes a stationary ring 1, a retaining ring 4, a fixed disk 12 and a rotating ring 15. The rotating ring 15 is provided on the inner side of the stationary ring 1 near the bottom. The rotating ring 15 is provided with blades 14 at the bottom. The rotating ring 15 has an annular groove 6 at the top near the center edge. The rotating ring 15 has an air inlet hole 7 through the bottom of the inner side.

[0023] The top of the moving ring 15 is connected to an annular protrusion 16 near the edge. The top of the annular protrusion 16 is provided with an inclined surface 19. The inner wall of the stationary ring 1 is fixed with a retaining ring 4 near the upper end of the moving ring 15 by a second bolt 3. The bottom of the retaining ring 4 is attached to the top of the inclined surface 19.

[0024] During use, since the top of the annular protrusion 16 is provided with an inclined surface 19, the retaining ring 4 is installed on the inner wall of the stationary ring 1, and the bottom end of the retaining ring 4 is attached to the top of the inclined surface 19. Since the inclined surface 19 is set to be inclined, the possibility of coal material easily entering the gap between the moving ring 15 and the stationary ring 1 is greatly reduced. Furthermore, by loosening the second bolt 3, the retaining ring 4 can be easily disassembled, thereby facilitating the cleaning and maintenance of the easily blocked position between the moving ring 15 and the stationary ring 1.

[0025] For example, such as Figure 1-3 As shown, the present invention also includes a first bolt 2 provided through a threaded hole on the inner wall of the stationary ring 1 near the top end.

[0026] During use, the stationary ring 1 can be easily fixed inside the coal mill using the first bolt 2.

[0027] For example, such as Figure 1-3 As shown, the present invention also includes a sealing ring 5 provided in a slot on the outer wall of the stationary ring 1 near the bottom.

[0028] During use, the sealing ring 5 can effectively improve the sealing effect between the outer wall of the stationary ring 1 and the inner wall of the coal mill.

[0029] For example, such as Figure 1-3 As shown, the present invention also includes a connecting disc 9 fixed to the top of the moving ring 15 near the center by a third bolt 8, a connecting shaft 10 connected to the top of the connecting disc 9 near the center, and a driven bevel gear 11 arranged around the connecting shaft 10.

[0030] During use, a motor is also installed inside the coal mill. The output end of the motor is connected to the driving bevel gear corresponding to the driven bevel gear 11. When the motor is working, it can drive the driving bevel gear to rotate, thereby causing the driven bevel gear 11 and the connecting shaft 10 to rotate, which in turn drives the moving ring 15 and the blade 14 to rotate.

[0031] For example, such as Figure 1-3 As shown, the present invention also includes a sleeve block 17 at the bottom of the fixed plate 12, a bearing 18 being installed at the bottom of the sleeve block 17 through a reserved groove, and the top end of the connecting shaft 10 being located inside the bearing 18.

[0032] During use, the bearing 18 limits and guides the connecting shaft 10, which can effectively improve the stability of the connecting shaft 10 during rotation.

[0033] For example, such as Figure 1-3 As shown, the present invention also includes a fourth bolt 13 provided at the bottom edge of the fixed plate 12 via a threaded groove.

[0034] During use, the fourth bolt 13 facilitates the fixing and installation of the fixed plate 12.

[0035] In use, the fourth bolt 13 facilitates the fixing of the fixed plate 12, thereby making it easy to install the fixed plate 12 on the top of the coal mill. The first bolt 2 facilitates the fixing of the stationary ring 1 inside the coal mill. The coal mill is also equipped with a motor, and the output end of the motor is connected to the driving bevel gear corresponding to the driven bevel gear 11. When the motor is working, it can drive the driving bevel gear to rotate, thereby causing the driven bevel gear 11 and the connecting shaft 10 to rotate, which in turn drives the moving ring 15 and the blades 14 to rotate. When the blades 14 rotate, they facilitate the introduction of airflow into the coal mill's grinding chamber through the moving ring 15, which is beneficial to the coal grinding operation.

[0036] Since the top of the annular protrusion 16 is provided with an inclined surface 19, the retaining ring 4 is installed on the inner wall of the stationary ring 1, and the bottom end of the retaining ring 4 is attached to the top of the inclined surface 19. Since the inclined surface 19 is set to be inclined, the possibility of coal material easily entering the gap between the moving ring 15 and the stationary ring 1 is greatly reduced. Furthermore, by loosening the second bolt 3, the retaining ring 4 can be easily disassembled, thereby facilitating the cleaning and maintenance of the easily blocked position between the moving ring 15 and the stationary ring 1.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rotary nozzle for a coal mill, characterized in that, It includes a stationary ring (1), a retaining ring (4), a fixed plate (12) and a moving ring (15). The stationary ring (1) is provided with a moving ring (15) near the bottom. The bottom of the moving ring (15) is provided with a blade (14). The top of the moving ring (15) is provided with an annular groove (6) near the center edge. The bottom of the moving ring (15) is provided with an air inlet hole (7). The top of the moving ring (15) is connected to an annular protrusion (16) near the edge. The top of the annular protrusion (16) is provided with an inclined surface (19). The inner wall of the stationary ring (1) is fixed with a retaining ring (4) near the upper end of the moving ring (15) by a second bolt (3). The bottom of the retaining ring (4) is attached to the top of the inclined surface (19).

2. A rotary nozzle for a coal mill according to claim 1, characterized in that, The inner wall of the stationary ring (1) near the top is provided with a first bolt (2) through a threaded hole.

3. A rotary nozzle for a coal mill according to claim 1, characterized in that, The outer wall of the stationary ring (1) is provided with a sealing ring (5) through a slot near the bottom.

4. A rotary nozzle for a coal mill according to claim 1, characterized in that, The top of the moving ring (15) is fixed with a connecting plate (9) near the center by a third bolt (8). The top of the connecting plate (9) is connected with a connecting shaft (10) near the center. A driven bevel gear (11) is provided around the connecting shaft (10). The bottom of the fixed plate (12) is provided with a sleeve (17), and the bottom of the sleeve (17) is equipped with a bearing (18) through a reserved groove. The top of the connecting shaft (10) is located inside the bearing (18).

5. A rotary nozzle for a coal mill according to claim 1, characterized in that, The bottom of the fixed plate (12) near the edge is provided with a fourth bolt (13) through a threaded groove.

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