Anti-blocking device and anti-blocking method for quantitative feeder

Abstract

The present invention discloses an anti-clogging device for a quantitative feeder. The device comprises a hollow connecting rod arranged in a vertical direction, a load-bearing tapered plate provided at the lower end of the connecting rod, the connecting rod extending into the quantitative feeder housing, the upper end of the connecting rod connected to a drive assembly, a tension sensor mounted on the outer wall of the connecting rod, and an air pipe mounted at the center of the connecting rod. One end of the air pipe extends into the interior of the connecting rod, and the other end of the air pipe is connected to an air compressor. The present invention also discloses an anti-clogging method for a quantitative feeder, which solves the clogging problem existing in existing quantitative feeders, improves system automation control, and reduces manual operation.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-blocking control of coal conveying equipment, relates to an anti-blocking device for a quantitative feeder, and further relates to an anti-blocking method for a quantitative feeder. Background Art

[0002] The quantitative feeder is a coal feeding device in front of the rod mill inlet. It can continuously and quantitatively transport raw coal to the rod mill, and plays a very important role in the entire pulping process production link. In actual operation, the coal flowing from above the quantitative feeder has a fluctuating coal flow rate due to the presence of coal particles. This often causes the quantitative feeder to be blocked, thus affecting the normal operation of the entire pulping equipment system. When the quantitative feeder is in operation, on-site staff need to spend a long time checking whether there is a blockage in the coal flow, which restricts manpower. Moreover, when a coal blockage occurs, the entire production line needs to be stopped, which greatly affects production efficiency. At the same time, the blocked part at the bottom of the silo cannot be cleared outside the silo and needs to be manually cleaned inside the silo, making the clearing process more difficult. Summary of the Invention

[0003] The purpose of the present invention is to provide an anti-blocking device for a quantitative feeder, which solves the blocking problem of existing quantitative feeders, improves system automation control, and reduces manual operation.

[0004] Another object of the present invention is to provide a method for preventing blocking of a quantitative feeder.

[0005] The first technical solution adopted by the present invention is an anti-blocking device for a quantitative feeder, comprising a hollow connecting rod arranged in a vertical direction, a load-bearing conical plate being provided at the lower end of the connecting rod, the connecting rod extending into the quantitative feeder bin, the upper end of the connecting rod being connected to a drive assembly, a tension sensor being installed on the outer wall of the connecting rod, an air pipe being installed at the center of the connecting rod, one end of the air pipe extending into the interior of the connecting rod, and the other end of the air pipe being connected to an air compressor.

[0006] The first technical solution of the present invention is also characterized in that:

[0007] The drive assembly includes a gearbox, a connecting rod passing through the gearbox, and a spur rack provided in the gearbox. The spur rack is fixed to the outer wall of the connecting rod, and a limit block is connected to the spur rack. The limit block is arranged perpendicular to the spur rack; the spur rack is meshed with a spur gear, and the spur gear is connected to the motor through the motor shaft.

[0008] A limiting groove is provided in the gear box, and the limiting block slides in the limiting groove.

[0009] A bin wall vibrator is provided on the outer side wall of the bin body of the quantitative feeder.

[0010] A plurality of pressure air nozzles are arranged on opposite sides of one end of the air pipe extending into the connecting rod from top to bottom, and a solenoid valve is arranged at the outlet of each pressure air nozzle.

[0011] There are three groups of pressure air nozzles, and each group of pressure air nozzles has two pressure air nozzles, namely: two pressure air nozzles a, two pressure air nozzles b, and two pressure air nozzles c. A solenoid valve a is installed at the outlet of the pressure air nozzle a, a solenoid valve b is installed at the outlet of the pressure air nozzle b, and a solenoid valve c is installed at the outlet of the pressure air nozzle c.

[0012] The motor is connected to the motor controller, solenoid valves a, b and c are all connected to the air controller, the tension sensor is connected to the tension feedback controller, the silo wall vibrator is connected to the silo wall vibrator controller, and the motor controller, air controller, tension feedback controller and silo wall vibrator controller are all connected to the main controller.

[0013] The second technical solution adopted by the present invention is a method for preventing blockage of a quantitative feeder, which specifically includes the following steps:

[0014] Step 1: When the quantitative feeder is operating normally, the coal flow impacts the load-bearing conical plate during its falling process. The impact force is transmitted to the tension sensor through the connecting rod and then fed back to the tension feedback controller, and then proceeds to step 2;

[0015] Step 2: The tension feedback controller determines whether a blockage occurs. If so, the process proceeds to step 3.

[0016] Step 3: The main controller sends a command to the silo wall vibrator controller, which turns on the silo wall vibrator. After a second, the process proceeds to step 4.

[0017] Step 4: The tension feedback controller determines whether the blockage still exists. If so, the process proceeds to step 5; if not, the process proceeds to step 9.

[0018] Step 5: The main controller sends a command to the air-injection controller, which opens the solenoid valve a of the pressure air nozzle a, using air to blow away the blocked coal flow. The blowing time is b seconds.

[0019] Step 6: The tension feedback controller determines whether the blockage still exists. If so, the process proceeds to step 7; if not, the process proceeds to step 9.

[0020] Step 7: The main controller sends a command to the air charging controller, which opens the solenoid valve b of the middle pressure air nozzle b. The air blowing time is b seconds, and then the process goes to step 8.

[0021] Step 8: If the blockage still exists, the main controller sends a command to the air controller, which opens the solenoid valve of the top pressure air nozzle c to clear the blockage and proceed to step 9.

[0022] Step 9: The main controller sends an instruction to the warehouse wall vibrator controller, and the warehouse wall vibrator controller turns off the warehouse wall vibrator.

[0023] The second technical solution of the present invention is also characterized in that:

[0024] The specific method of the tension feedback controller to judge the blockage is: set the normal tension value to P 正 , set the blocking factor , according to the size of coal flow The value is between 10% and 20%. The tension sensor collects the tension value P every m seconds, and collects n groups of tension data P1, P2, ..., P n A total of m × n seconds is a detection cycle. Calculate the average tension value P within a detection cycle. 平 , the formula is as follows:

[0025]

[0026] When coal flow is blocked in the quantitative feeder bin, the coal flow accumulated at the bottom of the bin gradually submerges the load-bearing conical plate. When the upper coal flow continues to fall, the impact force on the load-bearing conical plate is reduced, and the tension value P fed back to the tension sensor is less than the normal tension value P monitored by the tension sensor. 正 , introduce the judgment value , to calculate the blocking factor and setting the blocking factor The difference is calculated as follows:

[0027]

[0028]

[0029] In each monitoring cycle, when the main controller determines the value The size of the coal flow at the bottom of the judgment bin is blocked, and the judgment value is When the coal flow is blocked, it is determined that the coal flow is blocked.

[0030] The present invention provides a beneficial effect: the anti-blocking device for a quantitative feeder can monitor coal flow blockages within the quantitative feeder bin in real time. When a blockage occurs, the control system automatically activates the bin wall vibrator and the air flushing system to resolve the blockage, ensuring the normal operation of the entire pulping equipment system. The device has a high degree of automation and can automatically clear blockages without manual labor, effectively reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the anti-blocking device for the quantitative feeder of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure inside the gear box of the anti-blocking device of the quantitative feeder of the present invention;

[0033] Figure 3 This is a schematic structural diagram of the connection between the air pipe inside the connecting rod, the compressed air nozzle, and the solenoid valve of the anti-clogging device of the quantitative feeder of the present invention;

[0034] Figure 4 The figure is a flow chart of the anti-blocking method for a quantitative feeder of the present invention.

[0035] In the figure, 1. belt conveyor, 2. load-bearing cone plate, 3. quantitative feeder silo, 4. connecting rod, 5. connecting head, 6. spur rack, 7. gearbox, 8. spur gear, 9. motor shaft, 10. motor, 11. tension sensor, 13. motor controller, 14. air charging controller, 15. tension feedback controller, 16. silo wall vibrator controller, 17. air compressor, 18. silo wall vibrator, 19. limit block, 20. limit slot, 21. air pipe, 22-1. pressure air nozzle a, 22-2. pressure air nozzle b, 22-3. pressure air nozzle b, 23-1. solenoid valve a, 23-2. solenoid valve b, 23-3. solenoid valve c. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The anti-blocking device of the quantitative feeder of the present invention is as follows: Figure 1 As shown, it includes a load-bearing conical plate 2 set in the quantitative feeder bin 3, the load-bearing conical plate 2 is connected to the lower end of the hollow connecting rod 4, the upper end of the connecting rod 4 is threadedly connected to the spur rack 6 through the connector 5, and the spur rack 6 is meshed with the spur gear 8, as shown in FIG. Figure 2 As shown, a spur rack 6 and a spur gear 8 are mounted within a gearbox 7, which has a limit slot 20 provided therein. A limit block 19 is connected to the spur rack 6 and is disposed perpendicularly to the spur rack 6. The limit block 19 can slide within the limit slot 20. The spur gear 8 is connected to the motor 10 via the motor shaft 9. A tension sensor 11 is provided on the upper sidewall of the connecting rod 4.

[0038] A silo wall vibrator 18 is provided on the outer side wall of the quantitative feeder silo body 3 , and a belt conveyor 1 is provided below the feeder silo body 3 .

[0039] like Figure 3As shown, an air pipe 21 is arranged inside the connecting rod 4, one end of the air pipe 21 extends into the connecting rod 4, and the other end of the air pipe 21 is connected to the air compressor 17. Three groups of pressure air nozzles (two pressure air nozzles in each group) are provided on both sides of the end of the air pipe 21 extending into the connecting rod 4 from top to bottom, namely: two pressure air nozzles a22-1, two pressure air nozzles b22-2, and two pressure air nozzles c22-3. A solenoid valve a23-1 is installed at the outlet of the pressure air nozzle a22-1, a solenoid valve b23-2 is installed at the outlet of the pressure air nozzle b22-2, and a solenoid valve c23-3 is installed at the outlet of the pressure air nozzle c22-3.

[0040] The motor controller 13 is electrically connected to the motor 10 to control the action of the motor 10 , the air charging controller 14 controls three groups of solenoid valves (solenoid valve a23 - 1 , solenoid valve b23 - 2 , and solenoid valve c23 - 3 ), the tension feedback controller 15 collects data from the tension sensor 11 and transmits it to the main controller 12 , and the silo wall vibrator controller 16 is electrically connected to control the action of the silo wall vibrator 18 .

[0041] The motor controller 13, the air charging controller 14, the tension feedback controller 15 and the warehouse wall vibrator controller 16 are all connected to the main controller.

[0042] The motor controller 13 instructs the motor 10 to operate, and then the height adjustment of the load-bearing conical plate 2 is achieved through the meshing cooperation of the spur rack 6 and the spur gear 8.

[0043] The load-bearing conical plate 2 is in the shape of an inverted funnel and is installed at the bottom end of the connecting rod 4, with the angle between the inclined surface and the horizontal plane being 45 degrees.

[0044] The anti-blocking method of the quantitative feeder of the present invention is as follows Figure 4 As shown, the specific control method steps are as follows:

[0045] Step 1: When the quantitative feeder is operating normally, the coal flow continuously impacts the load-bearing conical plate 2 during its falling process. The impact force is transmitted to the tension sensor 11 through the connecting rod 4 and then fed back to the tension feedback controller 15, and then proceeds to step 2;

[0046] Step 2: The tension feedback controller 15 determines whether a blockage occurs. If so, the process proceeds to step 3.

[0047] Step 3: The main controller sends a command to the silo wall vibrator controller 16, which turns on the silo wall vibrator 18. After a second, the process proceeds to step 4.

[0048] Step 4: The tension feedback controller 15 determines whether the blockage still exists. If so, the process proceeds to step 5; if not, the process proceeds to step 9.

[0049] Step 5: The main controller sends a command to the air controller 14, which opens the electromagnetic valve a23-1 of the pressure air nozzle a22-1 and uses high-pressure air to blow away the blocked coal flow. The blowing time is b seconds.

[0050] Step 6: The tension feedback controller 15 determines whether the blockage still exists. If so, the process proceeds to step 7; if not, the process proceeds to step 9.

[0051] Step 7: The main controller sends a command to the air charging controller 14, which opens the electromagnetic valve b23-2 of the middle pressure air nozzle b22-2. The air blowing time is b seconds, and the process goes to step 8.

[0052] Step 8: If the blockage still exists, the main controller sends a command to the air controller 14, and the air controller 14 opens the solenoid valve of the top pressure air nozzle c22-3 to complete the blockage and enter step 9;

[0053] Step 9: The main controller sends an instruction to the warehouse wall vibrator controller 16 , and the warehouse wall vibrator controller 16 turns off the warehouse wall vibrator 18 .

[0054] The specific method of the tension feedback controller 15 to determine the blockage is: set the normal tension value to be P 正 , set the blocking factor , according to the size of coal flow The value is between 10% and 20%. The tension sensor 11 collects the tension value P every millisecond, and collects n groups of tension data P1, P2, ..., P n A total of m × n seconds is a test cycle. Calculate the average tensile force P within a test cycle 平 , the formula is as follows:

[0055]

[0056] When coal flow is blocked in the quantitative feeder bin 3, the coal flow accumulated at the bottom of the bin gradually submerges the load-bearing conical plate 2. When the upper coal flow continues to fall, the impact force on the load-bearing conical plate 2 is greatly reduced. The tension value P fed back to the tension sensor 11 is less than the normal tension value P monitored by the tension sensor 11. 正 . Introducing the calculation of the blocking factor , introduce the judgment value , to calculate the blocking factor and setting the blocking factor The difference is calculated as follows:

[0057]

[0058]

[0059] In each monitoring cycle, when the main controller determines the value The size of the coal flow at the bottom of the judgment bin is blocked. When the coal flow is blocked, it is determined that the coal flow is blocked.

[0060] The present invention allows for different safe coal flow accumulation heights (the height of the load-bearing conical plate 2) to be set for different coal flow rates. The specific method for adjusting the safe coal flow accumulation height is as follows: the main controller instructs the motor controller 13 to turn on the motor 10. The motor 10 rotates the spur gear 8 via the motor shaft 9. The spur rack 6 converts the rotational motion into vertical linear motion. The spur rack 6 then drives the connecting rod 4 and the load-bearing conical plate 2 to adjust within the limit slot 20, thereby adjusting the height of the load-bearing conical plate 2.

[0061] Example

[0062] The production capacity of the quantitative feeder is 100m 3 / h, 200 m 3 / h as an example, when the production volume is 200m 3 / h, the coal flow is large, and a small amount of coal flow accumulates at the bottom of the bin, which will cause a blockage risk. At this time, the main controller instructs the motor controller 13 to start the motor 10 to adjust the height of the load-bearing cone plate 2 to 20 cm from the bottom of the bin; when the production volume is reduced to 100m 3 / h, the safe coal flow allowed to be accumulated at the bottom of the silo becomes larger, and the safe accumulation height of the coal flow at the bottom of the silo becomes higher. At this time, the main controller instructs the motor controller 13 to start the motor 10 to adjust the height of the load-bearing conical plate 2 to 30 cm from the bottom of the silo.

Claims

1. Anti-blocking device for quantitative feeder, characterized by: The invention comprises a hollow connecting rod (4) arranged in a vertical direction, a load-bearing conical plate (2) being provided at the lower end of the connecting rod (4), the connecting rod (4) extending into the quantitative feeder bin (3), the upper end of the connecting rod (4) being connected to a driving assembly, a tension sensor (11) being installed on the outer wall of the connecting rod (4), an air pipe (21) being installed at the center of the connecting rod (4), one end of the air pipe (21) extending into the interior of the connecting rod (4), and the other end of the air pipe (21) being connected to an air compressor (17); The driving assembly includes a gear box (7), a connecting rod (4) passing through the gear box (7), a spur rack (6) provided in the gear box (7), the spur rack (6) being fixed to the outer wall of the connecting rod (4), a limit block (19) being connected to the spur rack (6), the limit block (19) being arranged perpendicular to the spur rack (6); the spur rack (6) being meshed with a spur gear (8), and the spur gear (8) being connected to the motor (10) via a motor shaft (9); The gear box (7) is provided with a limiting groove (20), and the limiting block (19) slides in the limiting groove (20); A bin wall vibrator (18) is provided on the outer side wall of the quantitative feeder bin body (3); The air pipe (21) extends into one end of the connecting rod (4) and is provided with a plurality of pressure air nozzles on both sides thereof from top to bottom, and a solenoid valve is provided at the outlet of each pressure air nozzle; The number of the pressure air nozzles is three groups, and the number of pressure air nozzles in each group is two, namely: two pressure air nozzles a (22-1), two pressure air nozzles b (22-2), and two pressure air nozzles c (22-3). The outlet of the pressure air nozzle a (22-1) is equipped with a solenoid valve a (23-1), the outlet of the pressure air nozzle b (22-2) is equipped with a solenoid valve b (23-2), and the outlet of the pressure air nozzle c (22-3) is equipped with a solenoid valve c (23-3). The motor (10) is connected to the motor controller (13), the solenoid valve a (23-1), the solenoid valve b (23-2), and the solenoid valve c (23-3) are all connected to the air charging controller (14), the tension sensor (11) is connected to the tension feedback controller (15), the warehouse wall vibrator (18) is connected to the warehouse wall vibrator controller (16), and the motor controller (13), the air charging controller (14), the tension feedback controller (15), and the warehouse wall vibrator controller (16) are all connected to the main controller.

2. The anti-clogging method of the anti-clogging device of the quantitative feeder according to claim 1, characterized in that: The specific steps include: Step 1: When the quantitative feeder is operating normally, the coal flow impacts the load-bearing conical plate (2) during its falling process. The impact force is transmitted to the tension sensor (11) through the connecting rod (4), and then fed back to the tension feedback controller (15), and then enters step 2; Step 2, the tension feedback controller (15) determines whether a blockage occurs, and if so, proceeds to step 3; Step 3: The main controller sends a command to the warehouse wall vibrator controller (16), and the warehouse wall vibrator controller (16) turns on the warehouse wall vibrator (18). After a second, the process proceeds to step 4. Step 4, the tension feedback controller (15) determines whether the blockage still exists, if yes, proceeds to step 5; if no, proceeds to step 9; Step 5: The main controller sends a command to the air injection controller (14). The air injection controller (14) opens the electromagnetic valve a (23-1) of the pressure air nozzle a (22-1) to blow away the blocked coal flow with air. The blowing time is b seconds. Step 6, the tension feedback controller (15) determines whether the blockage still exists, if yes, proceeds to step 7, if no, proceeds to step 9; The specific method of the tension feedback controller (15) to judge the blockage is: set the normal tension value to be P 正 , set the blocking factor , according to the size of coal flow The value is between 10% and 20%. The tension sensor (11) collects the tension value P every m seconds, and collects n groups of tension data P1, P2, ..., P n A total of m × n seconds is a detection cycle. Calculate the average tension value P within a detection cycle. 平 , the formula is as follows: When coal flow is blocked in the quantitative feeder bin (3), the coal flow accumulated at the bottom of the bin gradually submerges the load-bearing conical plate (2). When the upper coal flow continues to fall, the impact force on the load-bearing conical plate (2) is reduced, and the tension value P fed back to the tension sensor (11) is less than the normal tension value P monitored by the tension sensor (11). 正 , introduce the calculation of congestion factor , introduce the judgment value , to calculate the blocking factor and setting the blocking factor The difference is calculated as follows: In each monitoring cycle, when the main controller determines the value The size of the coal flow at the bottom of the judgment bin is blocked, and the judgment value is When , it is determined that coal flow is blocked; Step 7: The main controller sends a command to the air injection controller (14). The air injection controller (14) opens the electromagnetic valve b (23-2) of the middle pressure air nozzle b (22-2). The air blowing time is b seconds, and then the process goes to step 8. Step 8: If the blockage still exists, the main controller sends a command to the air charging controller (14), and the air charging controller (14) opens the solenoid valve of the top pressure air nozzle c (22-3), completing the blockage removal and proceeding to step 9; Step 9: The main controller sends an instruction to the silo wall vibrator controller (16), and the silo wall vibrator controller (16) turns off the silo wall vibrator (18).

Images