Coal mill inlet primary air duct adjusting device

Abstract

The invention relates to the technical field of coal mills, and discloses a coal mill inlet primary air duct adjusting device which comprises a shell, a connecting air duct is fixedly connected to one side of the shell, a connecting edge is integrally formed on one side of the connecting air duct, mounting holes are formed in the two sides of the shell, and side air ducts are fixedly connected into the mounting holes; a plurality of first air inlets which are evenly distributed are formed in the outer side of the side air channel, a filter screen cylinder which is attached to the side air channel is arranged in the side air channel, the filter screen cylinder is detachably connected with the side air channel through bolts, and an adjusting air cylinder which is attached to the filter screen cylinder is arranged in the filter screen cylinder. According to the air duct adjusting device, impurities can be prevented from adhering to the filter screen cylinder and blocking the filter screen cylinder, the using effect of the air duct adjusting device is improved, the adjusting air duct can be prevented from rotating after air volume adjustment is completed, the using stability of the air duct adjusting device is improved, the impurities can be conveniently cleaned out of the adjusting air duct, and the practicability is high. And the use effect of the air duct adjusting device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of coal mills, and in particular to a primary air duct regulating device at an inlet of a coal mill. Background Art

[0002] Coal mill is a machine that breaks up coal and grinds it into coal powder. It is an important auxiliary equipment for coal powder furnace. The coal grinding process is mainly carried out in three ways: crushing, breaking and grinding. In thermal power plants, coal mill is an important auxiliary equipment. Its function is to grind raw coal into coal powder to meet the needs of boiler combustion.

[0003] At present, air volume regulation of the primary air duct at the inlet of the coal mill is crucial to ensure the normal operation of the coal mill and the stable combustion of the boiler. However, dust blockage and other problems are prone to occur at the location of the primary air duct at the inlet of the traditional coal mill, which in turn affects the effect of air volume regulation. Summary of the invention

[0004] Technical issues solved

[0005] In view of the deficiencies in the prior art, the present invention provides a primary air duct regulating device at the inlet of a coal mill, which is mainly used to solve the problem that dust blockage and the like are prone to occur at the primary air duct at the inlet of a traditional coal mill, thereby affecting the air volume regulating effect.

[0006] Technical Solution

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A primary air duct regulating device for an inlet of a coal mill comprises a shell, one side of the shell is fixedly connected with a connecting air duct, one side of the connecting air duct is integrally formed with a connecting edge, both sides of the shell are provided with mounting holes, a side air duct is fixedly connected in the mounting holes, a plurality of evenly distributed air inlets are provided on the outside of the side air duct, a filter cylinder fitted with the side air duct is provided in the side air duct, the filter cylinder is detachably connected to the side air duct by bolts, an adjusting air cylinder fitted with the filter cylinder is provided in the filter cylinder, and the outside of the adjusting air cylinder is evenly distributed A plurality of air inlet 2 with the same specifications as the air inlet 1 are provided, and frames are fixedly connected to both sides of the shell, one side of one of the frames is provided with a power component for driving the adjusting air cylinder to rotate, a scraper ring that fits the adjusting air cylinder is provided in the adjusting air cylinder, a rubber strip is fixedly connected to one side of the scraper ring, a driving component for driving the scraper ring to move is provided in the adjusting air cylinder, a guide component for making the scraper ring move horizontally is provided in the adjusting air cylinder, and a locking component for fixing the adjusting air cylinder is provided on the other side of the frame.

[0009] Furthermore, the locking assembly includes an electric lock, which is fixedly connected to one side of another frame, and the other end of the rotating shaft is fixedly connected to a positioning plate, and a plurality of evenly distributed slots are provided on the outer side of the positioning plate, and the telescopic part of the electric lock is plugged into the slot.

[0010] On the basis of the above scheme, the power assembly includes an electric push rod, which is fixedly connected to one side of one of the frames, one end of the telescopic part of the electric push rod is fixedly connected to a rack, and vertical bearing seats are fixedly connected in both of the frames. A rotating shaft is provided between the two vertical bearing seats, and the rotating shaft passes through the adjusting air cylinder, a connecting frame is fixedly connected to the outer side of the rotating shaft, and the connecting frame is fixed to the adjusting air cylinder, one end of the rotating shaft is keyed to a gear, and the gear is meshed with the rack, and a support assembly for enabling the rack to move horizontally is provided on one side of one of the frames.

[0011] As a further solution of the present invention, the support assembly includes two mounting blocks, the two mounting blocks are fixedly connected to one side of one of the frames, two guide rods 1 are fixedly connected between the two mounting blocks, two sliding sleeves 1 are slidably connected to the outer sides of the two guide rods 1, and the sliding sleeve 1 is fixed to the rack.

[0012] Furthermore, the drive assembly includes a motor mounting plate, which is fixedly connected to the top of one of the frames, and a servo motor is fixedly connected to one side of the motor mounting plate. One end of the servo motor output shaft passes through the motor mounting plate and is connected to a threaded rod via a coupling. The outer side of the threaded rod is threadedly connected to a threaded sleeve, and the threaded sleeve is fixed to the scraper ring.

[0013] On the basis of the above scheme, the guide assembly includes two guide rods 2, both of which are arranged in the adjusting air duct, the two ends of the two guide rods 2 are respectively fixed to the two frames, the outer sides of the two guide rods 2 are slidably connected with sliding sleeves 2, and the sliding sleeves 2 are fixed to the scraper ring.

[0014] As a further solution of the present invention, both sides of the two frames are provided with adjustment legs, one side of the plurality of adjustment legs is provided with a plurality of adjustment holes, and the adjustment legs are fixed to the frames by bolts passing through the adjustment holes.

[0015] Beneficial Effects

[0016] Compared with the prior art, the present invention provides a primary air duct regulating device at the inlet of a coal mill, which has the following beneficial effects:

[0017] 1. By adjusting the wind tube, the power assembly is used to rotate the adjusting wind tube, which will scrape and clean the impurities on the filter cylinder, so that the impurities on the filter cylinder enter the adjusting wind tube, avoiding impurities adhering to the filter cylinder and causing the filter cylinder to be blocked, thereby improving the use effect of the air duct adjustment device.

[0018] 2. Through the setting of the locking component, after the adjustment of the air volume is completed by rotating the adjustment duct, the adjustment duct can be fixed by the locking component, thereby preventing the adjustment duct from rotating after the air volume is adjusted, thereby improving the stability of the use of the air duct adjustment device.

[0019] 3. Through the setting of the scraper ring, after the adjusting air cylinder cleans the impurities on the filter cylinder into the filter cylinder, the scraper ring can be moved by the driving component, so that the scraper ring can scrape and clean the impurities inside the adjusting air cylinder, thereby facilitating the cleaning of the impurities out of the adjusting air cylinder and improving the use effect of the air duct regulating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front three-dimensional structure of a coal mill inlet primary air duct regulating device proposed by the present invention;

[0021] Figure 2 A schematic diagram of the rear three-dimensional structure of a coal mill inlet primary air duct regulating device proposed by the present invention;

[0022] Figure 3 A schematic diagram of the partial exploded structure of a primary air duct regulating device for a coal mill inlet proposed by the present invention;

[0023] Figure 4 This is a partially enlarged structural schematic diagram of a primary air duct regulating device for a coal mill inlet proposed by the present invention;

[0024] Figure 5 This is a schematic diagram of the enlarged structure of part A of a primary air duct regulating device for a coal mill inlet proposed by the present invention;

[0025] Figure 6 A partial cross-sectional structural schematic diagram of a coal mill inlet primary air duct regulating device proposed by the present invention;

[0026] Figure 7 This is a schematic diagram of the scraper ring structure of a coal mill inlet primary air duct adjustment device proposed by the present invention.

[0027] In the figure: 1. connecting air duct; 2. connecting edge; 3. adjusting leg; 4. adjusting hole; 5. frame; 6. adjusting air cylinder; 7. shell; 8. air inlet 1; 9. filter cylinder; 10. air inlet 2; 11. side air duct; 12. electric push rod; 13. mounting block; 14. sliding sleeve 1; 15. rack; 16. guide rod 1; 17. gear; 18. vertical bearing seat; 19. rotating shaft; 20. connecting frame; 21. slot; 22. electric control lock; 23. positioning plate; 24. servo motor; 25. motor mounting plate; 26. threaded rod; 27. threaded sleeve; 28. scraper ring; 29. ​​sliding sleeve 2; 30. guide rod 2; 31. rubber strip. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Reference Figure 1-Figure 7 A primary air duct regulating device at the inlet of a coal mill comprises a shell 7, a connecting air duct 1 is fixed to one side of the shell 7 by bolts, a connecting edge 2 is integrally formed on one side of the connecting air duct 1, mounting holes are provided on both sides of the shell 7, a side air duct 11 is fixed in the mounting hole by bolts, a plurality of evenly distributed air inlets 8 are provided on the outer side of the side air duct 11, a filter cylinder 9 fitted with the side air duct 11 is provided in the side air duct 11, the filter cylinder 9 is detachably connected to the side air duct 11 by bolts, and an adjusting air cylinder 6 fitted with the filter cylinder 9 is provided in the filter cylinder 9, The outside of the regulating air cylinder 6 is evenly provided with a plurality of air inlets 10 of the same specification as the air inlet 1 8. When in use, the connecting air duct 1 is connected and installed with the coal mill inlet through the connecting edge 2. At this time, the external wind will enter the side air duct 11. At this time, since the air inlet 1 8 and the air inlet 2 10 are aligned and connected, the wind will enter the connecting air duct 1 through the air inlet 1 8 on the side air duct 11 and the air inlet 2 10 on the regulating air cylinder 6, so that the wind enters the coal mill through the connecting air duct 1, and at the same time, the filter cylinder 9 will filter the impurities carried in the wind.

[0030] The housing 7 is fixed with a frame 5 on both sides by bolts, one side of one of the frames 5 is provided with a power assembly for driving the adjusting wind tube 6 to rotate, the adjusting wind tube 6 is provided with a scraper ring 28 that fits the adjusting wind tube 6, one side of the scraper ring 28 is bonded with a rubber strip 31, the adjusting wind tube 6 is provided with a driving assembly for driving the scraper ring 28 to move, the adjusting wind tube 6 is provided with a guide assembly for making the scraper ring 28 move horizontally, and the other side of the frame 5 is provided with a locking assembly for fixing the adjusting wind tube 6. When the air intake volume needs to be adjusted, the locking assembly is no longer fixed to the adjusting wind tube 6, and then the power assembly is used to adjust the air intake volume. The regulating wind tube 6 is driven to rotate, so that the air inlet 2 10 on the regulating wind tube 6 is misaligned with the air inlet 1 8 on the side air duct 11, and the gap between the air inlet 1 8 and the air inlet 2 10 is changed, thereby changing the air intake volume. In the process of rotating the regulating wind tube 6, since the regulating wind tube 6 is in contact with the filter cylinder 9, the regulating wind tube 6 will scrape and clean the impurities on the filter cylinder 9 through the air inlet 2 10, so that the impurities on the filter cylinder 9 enter the regulating wind tube 6 through the air inlet 2 10, avoiding the impurities adhering to the filter cylinder 9 and causing the filter cylinder 9 to be blocked, thereby improving the use effect of the air duct regulating device.

[0031] In the present invention, the power assembly includes an electric push rod 12, which is fixed to one side of one of the frames 5 by bolts, a rack 15 is fixed to one end of the telescopic portion of the electric push rod 12 by bolts, vertical bearing seats 18 are fixed to the two frames 5 by bolts, a rotating shaft 19 is provided between the two vertical bearing seats 18, and the rotating shaft 19 passes through the adjusting wind tube 6, a connecting frame 20 is welded to the outer side of the rotating shaft 19, and the connecting frame 20 is fixed to the adjusting wind tube 6, one end of the rotating shaft 19 is key-connected with a gear 17, and the gear 17 is meshed with the rack 15, and the locking assembly includes an electric control lock 22, which is fixed to one side of the other frame 5 by bolts, and a positioning plate 23 is fixed to the other end of the rotating shaft 19 by bolts, and a plurality of evenly distributed card slots 21 are provided on the outer side of the positioning plate 23, and the telescopic portion of the electric control lock 22 is plugged into the card slot 21. When When the air intake volume needs to be adjusted, the electric control lock 22 is started to retract, so that the electric control lock 22 is disengaged from the card slot 21 on the positioning plate 23, so that the adjusting air cylinder 6 is no longer fixed. When the adjusting air cylinder 6 needs to be rotated, the electric push rod 12 is started to extend, and the electric push rod 12 will push the rack 15 to move. The rack 15 will drive the gear 17 to rotate through the meshing between the rack 15 and the gear 17, and the gear 17 will drive the rotating shaft 19 to rotate. The rotating shaft 19 will drive the connecting frame 20 to rotate, and the connecting frame 20 will drive the adjusting air cylinder 6 to rotate. When the air intake volume is adjusted, the electric push rod 12 is closed, and the electric control lock 22 is started to extend, so that the electric control lock 22 is inserted into the card slot 21 on the positioning plate 23, so as to fix the adjusting air cylinder 6, and avoid the adjusting air cylinder 6 from rotating after the air volume adjustment is completed, thereby improving the stability of the air duct adjustment device.

[0032] In particular, a support assembly for horizontally moving the rack 15 is provided on one side of one of the frames 5, and the support assembly includes two mounting blocks 13, and the two mounting blocks 13 are fixed to one side of one of the frames 5 by bolts, and two guide rods 16 are fixed between the two mounting blocks 13 by bolts, and the outer sides of the two guide rods 16 are slidably connected with two sliding sleeves 14, and the sliding sleeves 14 are fixed to the rack 15, and the rack 15 will drive the sliding sleeves 14 to move along the guide rods 16 during the movement, thereby ensuring that the rack 15 The rack 15 is supported by the sliding sleeve 14 to ensure the stability of the rack 15. The driving assembly includes a motor mounting plate 25, which is fixed to the top of one of the frames 5 by bolts. A servo motor 24 is fixed to one side of the motor mounting plate 25 by bolts. One end of the output shaft of the servo motor 24 passes through the motor mounting plate 25 and is connected to a threaded rod 26 through a coupling. The outer side of the threaded rod 26 is threadedly connected to a threaded sleeve 27, and the threaded sleeve 27 is fixed to a scraper ring 28. The guide assembly includes Two guide rods 230 are arranged in the regulating air cylinder 6. The two ends of the two guide rods 230 are respectively fixed to the two frames 5. The outer sides of the two guide rods 230 are slidably connected with the sliding sleeves 29, and the sliding sleeves 29 are fixed to the scraper ring 28. When it is necessary to clean the impurities in the regulating air cylinder 6, the servo motor 24 is started, and the servo motor 24 drives the threaded rod 26 to rotate. The threaded rod 26 drives the threaded sleeve 27 to move through the threaded engagement between the threaded rod 26 and the threaded sleeve 27, and the threaded sleeve 27 drives the scraper The ring 28 moves horizontally along the guide rod 2 30 through the sliding sleeve 29, so that the scraper ring 28 scrapes and cleans the impurities in the adjusting air duct 6, which is convenient for cleaning the impurities out of the adjusting air duct 6 and improves the use effect of the air duct adjusting device. Adjustment legs 3 are provided on both sides of the two frames 5, and multiple adjustment holes 4 are opened on one side of the multiple adjustment legs 3. The adjustment legs 3 are fixed to the frame 5 by bolts passing through the adjustment holes 4. The height of the shell 7 can be changed by adjusting the legs 3, so that the shell 7 can be adapted to coal mills of different heights.

[0033] Working principle of this embodiment: When in use, the connecting air duct 1 is connected and installed with the coal mill inlet through the connecting edge 2. At this time, the external wind will enter the side air duct 11. At this time, since the air inlet 1 8 and the air inlet 2 10 are aligned and connected, the wind will enter the connecting air duct 1 through the air inlet 1 8 on the side air duct 11 and the air inlet 2 10 on the regulating air cylinder 6, so that the wind enters the coal mill through the connecting air duct 1. At the same time, the filter cylinder 9 will filter the impurities carried in the wind. When it is necessary to adjust the air intake, the electric control lock 22 is started to contract, so that the electric control lock 2 2 is disengaged from the card slot 21 on the positioning plate 23, and then the electric push rod 12 is started to extend, the electric push rod 12 will push the rack 15 to move, the rack 15 will drive the gear 17 to rotate through the meshing between the gear 17, the gear 17 will drive the rotating shaft 19 to rotate, the rotating shaft 19 will drive the connecting frame 20 to rotate, and the connecting frame 20 will drive the adjusting air cylinder 6 to rotate, so that the air inlet 2 10 on the adjusting air cylinder 6 and the air inlet 1 8 on the side air duct 11 are misaligned, changing the gap between the air inlet 1 8 and the air inlet 2 10, thereby changing the air inlet When the air volume is adjusted, the electric push rod 12 is closed, and the electric control lock 22 is started to extend, so that the electric control lock 22 is inserted into the slot 21 on the positioning plate 23, thereby fixing the adjusting air cylinder 6 to prevent the adjusting air cylinder 6 from rotating after the air volume adjustment is completed, thereby improving the stability of the air duct adjustment device. During the rotation of the adjusting air cylinder 6, since the adjusting air cylinder 6 is in contact with the filter cylinder 9, the adjusting air cylinder 6 will scrape and clean the impurities on the filter cylinder 9 through the air inlet 10, so that the impurities on the filter cylinder 9 enter the adjusting air cylinder 6 through the air inlet 10. The servo motor 24 is then started, which drives the threaded rod 26 to rotate, and the threaded rod 26 drives the threaded sleeve 27 to move through the threaded engagement with the threaded sleeve 27, and the threaded sleeve 27 drives the scraper ring 28 to move horizontally along the guide rod 2 30 through the sliding sleeve 29, so that the scraper ring 28 scrapes and cleans the impurities in the regulating air tube 6, which is convenient for cleaning the impurities out of the regulating air tube 6, thereby improving the use effect of the air duct regulating device.

[0034] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0035] In the description of this article, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A primary air duct regulating device at the inlet of a coal mill, comprising a housing (7), characterized in that: A connecting air duct (1) is fixedly connected to one side of the shell (7), and a connecting edge (2) is integrally formed on one side of the connecting air duct (1). Both sides of the shell (7) are provided with mounting holes, and a side air duct (11) is fixedly connected in the mounting holes. A plurality of evenly distributed air inlets (8) are provided on the outside of the side air duct (11). A filter cylinder (9) that fits the side air duct (11) is provided in the side air duct (11), and the filter cylinder (9) is detachably connected to the side air duct (11) by bolts. An adjusting air cylinder (6) that fits the filter cylinder (9) is provided in the filter cylinder (9), and a plurality of evenly distributed air inlets (8) that fit the side air duct (11) are provided on the outside of the adjusting air cylinder (6). 8) two air inlets (10) of equal specifications, the shell (7) is fixedly connected to a frame (5) on both sides, one side of the frame (5) is provided with a power component for driving the adjustable wind tube (6) to rotate, the adjustable wind tube (6) is provided with a scraper ring (28) that fits the adjustable wind tube (6), one side of the scraper ring (28) is fixedly connected with a rubber strip (31), the adjustable wind tube (6) is provided with a driving component for driving the scraper ring (28) to move, the adjustable wind tube (6) is provided with a guide component for making the scraper ring (28) move horizontally, and the other side of the frame (5) is provided with a locking component for fixing the adjustable wind tube (6).

2. The coal mill inlet primary air duct regulating device according to claim 1, characterized in that: The power assembly comprises an electric push rod (12), the electric push rod (12) is fixedly connected to one side of one of the frames (5), one end of the telescopic part of the electric push rod (12) is fixedly connected to a rack (15), both of the frames (5) are fixedly connected to a vertical bearing seat (18), a rotating shaft (19) is provided between the two vertical bearing seats (18), and the rotating shaft (19) passes through the adjusting wind tube (6), the outer side of the rotating shaft (19) is fixedly connected to a connecting frame (20), and the connecting frame (20) is fixed to the adjusting wind tube (6), one end of the rotating shaft (19) is key-connected to a gear (17), and the gear (17) is meshed with the rack (15), and one side of one of the frames (5) is provided with a support assembly for enabling the rack (15) to move horizontally.

3. The primary air duct regulating device at the coal mill inlet according to claim 2, characterized in that: The locking assembly comprises an electric lock (22), the electric lock (22) being fixedly connected to one side of another frame (5), the other end of the rotating shaft (19) being fixedly connected to a positioning plate (23), the outer side of the positioning plate (23) being provided with a plurality of evenly distributed card slots (21), and the telescopic portion of the electric lock (22) being plugged into the card slots (21).

4. The coal mill inlet primary air duct regulating device according to claim 3, characterized in that: The support assembly comprises two mounting blocks (13), the two mounting blocks (13) are fixedly connected to one side of one of the frames (5), two guide rods (16) are fixedly connected between the two mounting blocks (13), the outer sides of the two guide rods (16) are slidably connected to two sliding sleeves (14), and the sliding sleeves (14) are fixed to the rack (15).

5. The primary air duct regulating device at the coal mill inlet according to claim 1, characterized in that: The driving assembly comprises a motor mounting plate (25), wherein the motor mounting plate (25) is fixedly connected to the top of one of the frames (5), a servo motor (24) is fixedly connected to one side of the motor mounting plate (25), one end of the output shaft of the servo motor (24) passes through the motor mounting plate (25) and is connected to a threaded rod (26) via a coupling, the outer side of the threaded rod (26) is threadedly connected to a threaded sleeve (27), and the threaded sleeve (27) is fixed to a scraper ring (28).

6. The coal mill inlet primary air duct regulating device according to claim 5, characterized in that: The guide assembly comprises two guide rods (30), both of which are arranged in the adjusting wind tube (6), and the two ends of the two guide rods (30) are respectively fixed to the two frames (5), and the outer sides of the two guide rods (30) are slidably connected with a sliding sleeve (29), and the sliding sleeve (29) is fixed to the scraper ring (28).

7. The coal mill inlet primary air duct regulating device according to claim 1, characterized in that: Adjustment legs (3) are provided on both sides of the two frames (5), and a plurality of adjustment holes (4) are provided on one side of the plurality of adjustment legs (3). The adjustment legs (3) are fixed to the frames (5) by bolts passing through the adjustment holes (4).

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