Wind speed detection anti-blocking system of coal mill

Abstract

The invention discloses a coal mill wind speed detection anti-blocking system, and particularly relates to the technical field of coal mills, the coal mill wind speed detection anti-blocking system comprises a main ventilation pipe, and connecting pipes are symmetrically installed at the two ends of the main ventilation pipe. The supporting mechanism is arranged between the main ventilation pipe and the connecting pipe, the anti-blocking cleaning mechanism and the sealing plate are arranged on the supporting mechanism, and the anti-blocking cleaning mechanism and the sealing plate can be in butt joint with the two ports of the main ventilation pipe correspondingly; the multiple sets of scrapers outside the anti-blocking cleaning mechanism are controlled to abut against the inner wall of the main ventilation pipe, so that the material scraping gap is greatly reduced, then the supporting base is controlled to drive the multiple sets of scrapers to move forwards and rotate in the main ventilation pipe, and dust impurities attached to the pipe wall can be rapidly and thoroughly removed; meanwhile, the fan blades generate airflow along with the rotation of the scraper to blow the scraped dust impurities, so that anti-blocking cleaning operation can be efficiently and stably realized, and the air speed detection anti-blocking system can be matched with air pipes with different diameters for use, is high in applicability and greatly improves the application effect of the air speed detection anti-blocking system.

Description

Technical Field

[0001] The invention relates to the technical field of coal mills, and in particular to a wind speed detection and anti-blocking system for a coal mill. Background Art

[0002] Coal mill is a machine that breaks coal blocks and grinds them into coal powder. It is an important auxiliary equipment for pulverized coal furnace. There are vertical mills, high-pressure roller mills, medium-speed micro-powder mills, super-pressure trapezoidal mills and Raymond mills. Coal mills are key equipment for crushing materials after they are broken. Coal mills are widely used in boilers, thermal power plants, cement manufacturing, glass and ceramics and other production industries.

[0003] At present, when the coal mill is working, it is often necessary to detect the wind speed and air volume of the ventilation pipe to ensure that the set inlet wind can blow out all the coal powder produced by the coal mill. However, due to long-term operation, dust and impurities will accumulate and adhere to the inner wall of the pipe, resulting in blockage, which will affect the air volume setting of the ventilation pipe. Therefore, anti-blocking design is needed. For example, the Chinese patent with patent number "CN218675026U" discloses "an active anti-blocking device for a volumetric wind sampling device of a ball mill". The device drives the cleaning block to slide along the inner wall of the conduit by setting a cleaning telescopic rod to clean the dust and impurities, thereby preventing blockage. However, in actual use, the cleaning block has a poor cleaning effect on the inner wall of the pipe, and fine dust particles can easily pass through the sliding gap, resulting in incomplete anti-blocking cleaning. In addition, the size of the cleaning block itself is fixed, which makes the applicability of the device poor. For ventilation ducts of different diameters, the cleaning block cannot match the cleaning, and the use effect is not good. Summary of the invention

[0004] The purpose of the present invention is to provide a coal mill wind speed detection and anti-blocking system, which is provided with a support mechanism between the main ventilation pipe and the connecting pipe, and an anti-blocking cleaning mechanism and a sealing plate are provided on the support mechanism. When in use, the connecting pipe can be moved away from the port of the main ventilation pipe, and the anti-blocking cleaning mechanism and the sealing plate can be respectively connected to the two ports of the main ventilation pipe; by controlling the retaining frame distributed in the outer ring array of the anti-blocking cleaning mechanism to drive multiple groups of scrapers to retract inward or open outward, so that each group of scrapers can be pressed against the inner wall of the main ventilation pipe to greatly reduce the scraping gap, and then the support seat is controlled to drive each group of scrapers to move forward and rotate in the main ventilation pipe, which can quickly and thoroughly remove dust impurities attached to the pipe wall, and at the same time, the fan blades generate airflow to blow towards the scraped dust impurities as the scraper rotates, and as the scraper moves forward, the dust impurities can be blown into the discharge pipe and discharged, thereby not only being able to efficiently and stably realize the anti-blocking cleaning operation, but also being able to match the use of air ducts of different diameters, having strong applicability, and greatly improving the application effect of the wind speed detection and anti-blocking system to solve the above-mentioned deficiencies in the technology.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a coal mill wind speed detection and anti-blocking system, comprising:

[0006] A main ventilation pipe, with connecting pipes symmetrically installed at both ends of the main ventilation pipe, and a wind speed sensor is provided at the port of the connecting pipe close to the main ventilation pipe;

[0007] A supporting mechanism, the supporting mechanism includes a fixing frame symmetrically fixed at both ends of the main ventilation pipe, the top of the fixing frame is connected to a fixing frame, the side walls of the two fixing frames are provided with a movable connecting frame, the bottom end of the connecting frame is symmetrically connected with a clamp and a mounting plate, the connecting pipe is connected to the connecting frame through the clamp, and the mounting plate is located on one side of the connecting pipe, one of the mounting plates is provided with an anti-blocking cleaning mechanism, and the other mounting plate is provided with a sealing plate facing the main ventilation pipe.

[0008] Preferably, the anti-blocking cleaning mechanism includes an electric push rod fixedly connected to the side wall of the mounting plate, the output end of the electric push rod is connected to a shell, a second motor is provided in the shell, the output end of the second motor is connected to a support seat, the outer wall of the support seat is provided with a plurality of groups of baffles in a circular array that can be simultaneously retracted inward or opened outward, and a synchronous motion component is provided in the support seat, and a scraper is connected to the outer side of the baffle.

[0009] Preferably, the synchronous motion component includes a support column fixed in the middle of the support seat, a movable ring is rotatably installed on the outer wall of the support column, a gear ring is fixed on one side of the movable ring, and the outer wall of the support column is provided with a plurality of threaded columns facing the retaining frame through a bearing ring array, a transmission gear meshing with the gear ring is fixed to one end of the threaded column, and a threaded barrel is provided at the other end of the threaded column, one end of the threaded barrel extends outside the support seat and is fixedly connected to the retaining frame.

[0010] Preferably, a third motor is embedded in the side wall of the support column, and an output end of the third motor is connected to a driving gear meshing with a gear ring.

[0011] Preferably, a limiting column is arranged at one end of the threaded barrel close to the transmission gear, and a limiting groove matching the limiting column is opened on the inner side of the support seat.

[0012] Preferably, a plurality of sliding columns are fixed on the inner side of the movable ring, and an annular sliding groove matching the sliding columns is formed on the outer wall of the support column.

[0013] Preferably, telescopic cylinders are rotatably connected between the inner ends of the retaining frame and the support seat.

[0014] Preferably, a discharge pipe is provided at one end of the bottom of the main ventilation pipe close to the sealing plate, an end cover is provided at the bottom of the discharge pipe, and a fan blade is provided at the output end of the second motor located on one side of the scraper.

[0015] Preferably, a sliding cavity is provided inside the fixed frame, a screw is rotatably connected to the sliding cavity through a bearing, the outer wall of the screw is connected to a movable block through a thread, and one end of the screw extends outside the fixed frame and is provided with a first motor, and the top of the connecting frame is fixedly connected to the movable block.

[0016] Preferably, a plurality of ventilation holes are provided between the support column and the support seat.

[0017] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0018] By arranging a support mechanism between the main ventilation pipe and the connecting pipe, the support mechanism is provided with an anti-blocking cleaning mechanism and a sealing plate. When in use, the connecting frame on the support mechanism can drive the clamp and the mounting plate to move horizontally, so that the connecting pipe is moved away from the port of the main ventilation pipe, and the mounting plate drives the anti-blocking cleaning mechanism and the sealing plate to respectively connect to the two ports of the main ventilation pipe to switch positions, wherein the sealing plate can block one end of the main ventilation pipe, and the anti-blocking cleaning mechanism can extend into the main ventilation pipe;

[0019] By controlling the smooth movement of multiple groups of baffles distributed in a circular array outside the anti-blocking cleaning mechanism, the baffles can drive the multiple groups of scrapers to retract inward or open outward, so that each group of scrapers can be pressed against the inner wall of the main ventilation duct to greatly reduce the scraping gap. Then the support seat is controlled to drive each group of scrapers to move forward and rotate in the main ventilation duct to quickly and thoroughly remove the dust and impurities attached to the duct wall. At the same time, the fan blades generate airflow to blow towards the scraped dust and impurities as the scraper rotates, and as the scraper moves forward, the dust and impurities can be blown into the discharge pipe and discharged, thereby realizing the anti-blocking cleaning operation efficiently and stably, and can be matched with air ducts of different diameters. It has strong applicability and greatly improves the application effect of the wind speed detection and anti-blocking system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a work flow chart of the present invention;

[0022] Figure 2 It is one of the three-dimensional structural schematic diagrams of the present invention as a whole;

[0023] Figure 3 The second schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 4 A longitudinal cross-sectional view of the present invention as a whole;

[0025] Figure 5 It is a structural schematic diagram of the connection between the connecting frame and the anti-blocking cleaning mechanism of the present invention;

[0026] Figure 6 A longitudinal cross-sectional view of the support base and the housing of the present invention;

[0027] Figure 7 It is a schematic diagram of the internal structure of the support base of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the support seat of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the connection between the connecting frame and the sealing plate of the present invention.

[0030] Description of reference numerals:

[0031] 1. Main ventilation duct; 2. Connecting pipe; 3. Wind speed sensor; 4. Discharge pipe; 5. Fixed frame; 6. Fixed frame; 7. Connecting frame; 8. Clamp; 9. Mounting plate; 10. Sealing plate; 11. Screw; 12. Movable block; 13. First motor; 14. Electric push rod; 15. Shell; 16. Second motor; 17. Fan blade; 18. Support seat; 19. Baffle; 20. Scraper; 21. Support column; 22. Telescopic cylinder; 23. Third motor; 24. Driving gear; 25. Movable ring; 26. Gear ring; 27. Sliding column; 28. Annular slide groove; 29. ​​Threaded column; 30. Threaded cylinder; 31. Transmission gear; 32. Limiting column; 33. Limiting groove. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] The present invention provides Figure 1-Figure 9 A coal mill wind speed detection and anti-blocking system shown includes:

[0034] A main ventilation pipe 1, connecting pipes 2 are symmetrically installed at both ends of the main ventilation pipe 1, and a wind speed sensor 3 is provided at the end of the connecting pipe 2 close to the main ventilation pipe 1;

[0035] The supporting mechanism includes a fixing frame 5 symmetrically fixed at both ends of the main ventilation pipe 1, the top of the fixing frame 5 is connected to a fixing frame 6, the side walls of the two fixing frames 6 are provided with a movable connecting frame 7, the bottom end of the connecting frame 7 is symmetrically connected with a clamp 8 and a mounting plate 9, the connecting pipe 2 is connected to the connecting frame 7 through the clamp 8, and the mounting plate 9 is located on one side of the connecting pipe 2, one of the mounting plates 9 is provided with an anti-blocking cleaning mechanism, and the other mounting plate 9 is provided with a sealing plate 10 facing the main ventilation pipe 1.

[0036] When in use, the coal mill can be started so that the wind speed sensor 3 detects the wind speed in the main ventilation duct 1 and transmits the data to the control processor, which analyzes and calculates the air volume and determines whether it reaches the air volume standard set according to the inlet air volume. If not, there may be a blockage effect, and the anti-blockage cleaning mechanism is operated.

[0037] A sliding cavity is provided inside the fixed frame 6, and a screw rod 11 is rotatably connected to the sliding cavity through a bearing. The outer wall of the screw rod 11 is connected to a movable block 12 through a thread. One end of the screw rod 11 extends outside the fixed frame 6 and is provided with a first motor 13. The top end of the connecting frame 7 is fixedly connected to the movable block 12.

[0038] By starting the first motor 13, the first motor 13 drives the screw 11 to rotate, and then the screw 11 drives the movable block 12 to move in the fixed frame 6, so that the movable block 12 drives the clamp 8 and the mounting plate 9 to move horizontally through the connecting frame 7. The clamp 8 can remove the connecting pipe 2 from the port of the main ventilation pipe 1, and the mounting plate 9 drives the anti-blocking cleaning mechanism and the sealing plate 10 to dock at the port of the main ventilation pipe 1 to switch the position.

[0039] The anti-blocking cleaning mechanism includes an electric push rod 14 fixedly connected to the side wall of the mounting plate 9, the output end of the electric push rod 14 is connected to a shell 15, a second motor 16 is arranged in the shell 15, the output end of the second motor 16 is connected to a support seat 18, the outer wall of the support seat 18 is provided with a plurality of groups of baffles 19 in a circular array that can be simultaneously retracted inward or opened outward, and a synchronous motion component is arranged in the support seat 18, and a scraper 20 is connected to the outer side of the baffle 19.

[0040] The inner ends of the retaining frame 19 and the support seat 18 are rotatably connected with telescopic cylinders 22. The connection strength between the retaining frame 19 and the support seat 18 can be greatly strengthened by the telescopic cylinder 22.

[0041] A discharge pipe 4 is provided at one end of the bottom of the main ventilation pipe 1 close to the sealing plate 10 , and an end cover is provided at the bottom of the discharge pipe 4 . The output end of the second motor 16 is located at one side of the scraper 20 and is provided with a fan blade 17 .

[0042] The synchronous motion component includes a support column 21 fixed in the middle of the support seat 18, and a movable ring 25 is rotatably installed on the outer wall of the support column 21. A gear ring 26 is fixed on one side of the movable ring 25. The outer wall of the support column 21 is provided with a plurality of threaded columns 29 facing the retaining frame 19 through a bearing ring array, and a transmission gear 31 meshing with the gear ring 26 is fixed at one end of the threaded column 29, and a threaded barrel 30 is provided at the other end of the threaded column 29, and one end of the threaded barrel 30 extends to the outside of the support seat 18 and is fixedly connected to the retaining frame 19.

[0043] A third motor 23 is embedded in the side wall of the support column 21 , and an output end of the third motor 23 is connected to a driving gear 24 meshing with a gear ring 26 .

[0044] A plurality of ventilation holes are disposed between the support column 21 and the support base 18 .

[0045] After the replacement, the sealing plate 10 blocks one end of the main ventilation pipe 1, and the anti-blocking cleaning mechanism is aligned with the other end of the main ventilation pipe 1, and the housing 15 is driven to move by the electric push rod 14, so that the housing 15 drives the support seat 18 to extend into the main ventilation pipe 1;

[0046] The third motor 23 is started, and the third motor 23 drives the gear ring 26 to rotate through the driving gear 24, and then the gear ring 26 drives the movable ring 25 to rotate, so that the gear ring 26 can drive each transmission gear 31 to rotate synchronously, and then the transmission gear 31 drives the threaded column 29 to rotate, so that the threaded column 29 drives the threaded cylinder 30 to move, and the threaded cylinder 30 can drive the retaining frame 19 to move. Under the support and limit of the telescopic cylinder 22, the retaining frame 19 can drive the scraper 20 to move stably, so that the multiple groups of scrapers 20 can be controlled to retract inward or open outward, so that each group of scrapers 20 can be pressed against the inner wall of the main ventilation pipe 1, so as to greatly reduce the scraping gap, and can be adjusted for use according to pipes of different diameters;

[0047] Then start the second motor 16 and the electric push rod 14, the electric push rod 14 can drive each group of scrapers 20 to move forward in the main ventilation duct 1 through the support seat 18, and the second motor 16 can drive each group of scrapers 20 to rotate in the main ventilation duct 1 through the support seat 18, so as to quickly and thoroughly remove the dust impurities attached to the pipe wall, and at the same time, the fan blades 17 generate airflow to blow the scraped dust impurities as the scraper 20 rotates, and as the scraper 20 moves forward, the dust impurities can be blown into the discharge pipe 4 and discharged outward from the discharge pipe 4. Compared with the existing method, it can not only efficiently and stably realize the anti-blocking cleaning operation, but also can be matched with air ducts of different diameters, with strong applicability, which greatly improves the application effect of the wind speed detection and anti-blocking system.

[0048] A limiting column 32 is arranged at one end of the threaded barrel 30 close to the transmission gear 31, and a limiting groove 33 matching the limiting column 32 is provided on the inner side of the support seat 18. The threaded barrel 30 can drive the limiting column 32 to slide along the limiting groove 33, thereby preventing the threaded barrel 30 from deflecting, so that the threaded barrel 30 can move smoothly along a straight line.

[0049] A plurality of slide posts 27 are fixed to the inner side of the movable ring 25, and an annular slide groove 28 matching the slide posts 27 is provided on the outer wall of the support column 21. The movable ring 25 can drive the slide posts 27 to slide in the annular slide groove 28, thereby greatly ensuring the stable rotation of the movable ring 25.

[0050] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A coal mill wind speed detection and anti-blocking system, characterized in that: include: A main ventilation pipe (1), wherein connecting pipes (2) are symmetrically installed at both ends of the main ventilation pipe (1), and a wind speed sensor (3) is provided at a port of the connecting pipe (2) close to the main ventilation pipe (1); A support mechanism, the support mechanism comprising a fixing frame (5) symmetrically fixed at both ends of a main ventilation pipe (1), the top of the fixing frame (5) being connected to a fixing frame (6), the side walls of the two fixing frames (6) being provided with a movable connecting frame (7), the bottom end of the connecting frame (7) being symmetrically connected to a clamp (8) and a mounting plate (9), the connecting pipe (2) being connected to the connecting frame (7) via the clamp (8), and the mounting plate (9) being located on one side of the connecting pipe (2), one of the mounting plates (9) being provided with an anti-blocking cleaning mechanism, and the other mounting plate (9) being provided with a sealing plate (10) facing the main ventilation pipe (1).

2. A coal mill wind speed detection and anti-blocking system according to claim 1, characterized in that: The anti-blocking cleaning mechanism comprises an electric push rod (14) fixedly connected to the side wall of the mounting plate (9), the output end of the electric push rod (14) is connected to a housing (15), a second motor (16) is arranged in the housing (15), the output end of the second motor (16) is connected to a support seat (18), the outer wall of the support seat (18) is provided with a plurality of groups of baffles (19) which can be simultaneously retracted inward or opened outward, in an annular array, and a synchronous motion component is arranged in the support seat (18), and a scraper (20) is connected to the outer side of the baffle (19).

3. A coal mill wind speed detection and anti-blocking system according to claim 2, characterized in that: The synchronous motion component includes a support column (21) fixed in the middle of the support seat (18), a movable ring (25) is rotatably mounted on the outer wall of the support column (21), a gear ring (26) is fixed on one side of the movable ring (25), and the outer wall of the support column (21) is provided with a plurality of threaded columns (29) facing the retaining frame (19) through a bearing ring array, a transmission gear (31) meshing with the gear ring (26) is fixed at one end of the threaded column (29), and a threaded barrel (30) is provided at the other end of the threaded column (29), and one end of the threaded barrel (30) extends to the outside of the support seat (18) and is fixedly connected to the retaining frame (19).

4. A coal mill wind speed detection and anti-blocking system according to claim 3, characterized in that: A third motor (23) is embedded in the side wall of the support column (21), and an output end of the third motor (23) is connected to a driving gear (24) meshing with a gear ring (26).

5. A coal mill wind speed detection and anti-blocking system according to claim 3, characterized in that: A limiting column (32) is arranged at one end of the threaded cylinder (30) close to the transmission gear (31), and a limiting groove (33) matching the limiting column (32) is opened on the inner side of the support seat (18).

6. A coal mill wind speed detection and anti-blocking system according to claim 3, characterized in that: A plurality of sliding columns (27) are fixed on the inner side of the movable ring (25), and an annular sliding groove (28) matching the sliding columns (27) is formed on the outer wall of the support column (21).

7. A coal mill wind speed detection and anti-blocking system according to claim 1, characterized in that: Telescopic cylinders (22) are rotatably connected between the inner ends of the retaining frame (19) and the support seat (18).

8. A coal mill wind speed detection and anti-blocking system according to claim 2, characterized in that: A discharge pipe (4) is provided at one end of the bottom of the main ventilation pipe (1) close to the sealing plate (10), and an end cover is provided at the bottom end of the discharge pipe (4). The output end of the second motor (16) is located on one side of the scraper (20) and is provided with a fan blade (17).

9. A coal mill wind speed detection and anti-blocking system according to claim 1, characterized in that: A sliding cavity is provided inside the fixed frame (6), a screw rod (11) is rotatably connected to the sliding cavity via a bearing, an outer wall of the screw rod (11) is connected to a movable block (12) via a thread, one end of the screw rod (11) extends outside the fixed frame (6) and is provided with a first motor (13), and the top end of the connecting frame (7) is fixedly connected to the movable block (12).

10. A coal mill wind speed detection and anti-blocking system according to claim 3, characterized in that: A plurality of ventilation holes are provided between the support column (21) and the support seat (18).

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