CN-116986342-B - Abrupt angle band anti-cutoff method and device

CN116986342BCN 116986342 BCN116986342 BCN 116986342BCN-116986342-B

Abstract

The invention discloses a method and a device for preventing cutoff of a steep angle belt. The method comprises the steps of judging whether feeding of a bin bottom belt is continuous or not according to material images on a steep angle belt, outputting an alarm prompt when the feeding is discontinuous, judging whether the calculated linear speed of a driving roller is consistent with the actual running speed of a belt or not, sending a corresponding control signal to a driving roller frequency converter of the bin bottom belt if the feeding is judged to be consistent, enabling the frequency of the driving roller frequency converter to be improved so as to improve the speed of the bin bottom belt, sending a corresponding control signal to a direct current electric cylinder if the feeding is inconsistent, enabling a screw rod at the upper part of the direct current electric cylinder to extend continuously, driving a roller motor and a roller to increase when the screw rod extends, judging whether the pressure signal of the roller reaches a preset pressure signal threshold value, enabling the screw rod of the direct current electric cylinder to stop extending if the feeding is inconsistent, and enabling a servo controller to drive the roller motor to drive the roller to rotate. The invention can eliminate the cutoff fault in the sprouting state and improve the intelligent level of single-machine equipment.

Inventors

JIN LIJIE
ZHANG JIANGTAO
XU XU
LI HONG
LI YINGYING
ZHANG HAIHUA
WANG XIANGJUAN

Assignees

河北白沙烟草有限责任公司保定卷烟厂

Dates

Publication Date: 20260512
Application Date: 20230821

Claims (10)

1.A method for preventing cutoff of a steep angle belt, comprising: S1, acquiring a material image on a steep angle belt acquired by an image recognition sensor in real time, and judging whether feeding of a bin bottom belt is continuous or not according to the material image; S2, when the discontinuous feeding of the bin bottom belt is judged, outputting an alarm prompt, acquiring an output signal of a first encoder, and calculating the linear speed of a driving roller of the bin bottom belt according to the output signal of the first encoder, wherein the first encoder is connected with the driving roller of the bin bottom belt; S3, if the linear speed of the driving roller is consistent with the actual running speed of the belt, a corresponding control signal is sent to a driving roller frequency converter of the bin bottom belt, so that the frequency of the driving roller frequency converter is increased, and the speed of the bin bottom belt is increased; S4, if the linear speed of the driving roller is inconsistent with the actual running speed of the belt, a corresponding control signal is sent to a direct current electric cylinder to enable a screw rod at the upper part of the direct current electric cylinder to extend continuously, the direct current electric cylinder is arranged at the lower part of the belt, a roller motor and a roller are arranged on the screw rod of the direct current electric cylinder, the roller motor is connected with a servo controller, and when the screw rod extends, the roller motor and the roller are driven to rise; And S5, acquiring a pressure signal of the roller, which is acquired by a pressure sensor, and judging whether the pressure signal reaches a preset pressure signal threshold, if so, sending a corresponding control signal to the direct current electric cylinder to stop the extension of a screw rod of the direct current electric cylinder, and simultaneously sending a corresponding control signal to the servo controller to drive the roller motor to drive the roller to rotate, wherein the linear speed of the roller is consistent with that of the driving roller, and the rotating direction of the roller is opposite to that of the driving roller.
2. The method of preventing cutoff of a steep angle belt according to claim 1, wherein determining whether the feed of the bottom belt of the bin is continuous based on the material image comprises: Comparing the similarity of the material image with a pre-stored standard steep angle belt material image, and judging the uniformity of the material on the steep angle belt; If the materials on the steep angle belt are judged to be uneven, the discontinuous feeding of the bottom belt of the storage bin is judged, and if the materials on the steep angle belt are judged to be even, the continuous feeding of the bottom belt of the storage bin is judged.
3. The abrupt angle band anti-shutoff method of claim 1, wherein the preset pressure signal threshold is 10mA.
4. The steep angle belt cut-out prevention method according to claim 1, wherein step S5 further comprises: Continuously acquiring an output signal of a first encoder, calculating the linear speed of a driving roller of a bin bottom belt according to the output signal of the first encoder, continuously acquiring the actual running speed of a belt of the bin bottom belt detected by a belt velometer, and comparing the linear speed of the driving roller with the actual running speed of the belt; If the linear speed of the driving roller is consistent with the actual running speed of the belt, a corresponding control signal is sent to the servo controller, so that the servo controller stops driving the roller motor to drive the roller to rotate; and after a preset time interval, comparing the linear speed of the driving roller with the actual running speed of the belt, if the linear speed of the driving roller is still consistent with the actual running speed of the belt, sending a corresponding control signal to the direct current electric cylinder to retract a screw rod of the direct current electric cylinder, and driving the roller motor and the roller to descend when the screw rod is retracted.
5. The method of preventing interruption of a steep angle belt according to claim 4, wherein the preset time interval is 10 seconds.
6. A steep angle belt cut-out prevention device, comprising: the image recognition sensor is arranged on the steep angle belt and is used for acquiring a material image on the steep angle belt; the first encoder is connected with the driving roller of the bin bottom belt and used for detecting the rotating speed of the driving roller; The belt velometer is contacted with the belt of the bin bottom belt and is used for detecting the actual running speed of the belt of the bin bottom belt; the driving roll frequency converter is connected with a bottom belt motor of the bottom belt of the storage bin and used for controlling the speed of the bottom belt of the storage bin; The direct-current electric cylinder is arranged at the lower part of a belt of the bin bottom belt, a screw rod is arranged at the upper part of the direct-current electric cylinder, and a roller motor and a roller are arranged on the screw rod; the servo controller is connected with the roller motor; The pressure sensor is arranged on the roller and used for collecting pressure signals of the roller; The system comprises a PLC controller, wherein the data output ends of an image recognition sensor, a first encoder, a belt velocimeter and a pressure sensor are electrically connected with one path of data input end of the PLC controller, the control signal input ends of a driving roll frequency converter, a direct current electric cylinder and a servo controller are electrically connected with one path of control signal output end of the PLC controller, the PLC controller comprises a memory and a processor, the memory stores a computer program, and the processor realizes the steps of the method in claim 1 when executing the computer program.
7. The apparatus of claim 6, further comprising a second encoder coupled to the drum motor for detecting a rotational speed of the drum motor, wherein a data output of the second encoder is electrically coupled to a data input of the PLC controller.
8. The cutoff device for steep belt as defined in claim 6, further comprising a constant pressure support mechanism disposed on a lower portion of a belt of the bottom belt of the bin, the belt velocimeter being disposed on the constant pressure support mechanism.
9. The heavy angle belt shut-off prevention device of claim 6, wherein the drum is spaced from the drive roll 7 times the thickness of the belt.
10. The heavy angle belt cut-off prevention device of claim 6, further comprising an operation control screen in bi-directional communication with the PLC controller.

Description

Abrupt angle band anti-cutoff method and device Technical Field The application relates to the technical field of cigarette production, in particular to a method and a device for preventing cut-out of a steep angle belt. Background The constant flow control is one of the key links of the control of the silk production process, and the constant flow control device mainly comprises a bin type feeding machine, a metering tube 1 and a control type electronic scale 2. The bin type feeding machine mainly comprises a bin 3, a bin bottom belt 4, a bin bottom belt motor, a material needing photoelectric tube 5, a steep angle belt 6, a steep angle belt motor, a material buffer area 7 and the like, wherein a high material level photoelectric tube 8, a medium material level photoelectric tube 9 and a low material level photoelectric tube 10 are arranged on a metering tube 1, and an electronic scale belt 11 is arranged on a control type electronic scale 2. The materials in the bin type feeding machine are conveyed to the steep angle belt 6 under the drive of the bin bottom belt 4, and the steep angle belt 6 controls the low speed, the medium speed and the high speed of the steep angle belt 6 according to the detection conditions of the high photoelectric tube, the medium photoelectric tube and the low photoelectric tube of the metering tube 1 so as to fill the materials into the metering tube 1. The material with a certain height in the metering tube 1 passes through the control type electronic scale 2 under the drive of the electronic scale belt 11. The control type electronic scale 2 can adjust the belt speed of the electronic scale belt 11 in real time according to the set flow, so as to ensure that the material passing through the electronic scale instantaneously reaches the set rated flow. In the production process, the rotation speed of the steep angle belt 6 is controlled through the on-off of the three opposite-emitting type photoelectric tubes of the metering tube 1, so that the materials in the metering tube 1 are kept at a certain height, and meanwhile, the detection signal of the material-needing photoelectric tube 5 of the bin type feeder controls the operation of a motor of a bottom belt of a bin to drive the bottom belt 4 of the bin to continuously convey the materials from the feeding belt conveyor 12 to the steep angle belt 6. The width of the bin bottom belt 4 is approximately equal to that of the steep angle belt 6, but the height of the material stored in the bin 3 is 4 times that of the material on the steep angle belt 6, so that in the production process, the bin bottom belt is fed in a stepping mode under the control of the material-needing photoelectric tube 5. According to statistics, even under the condition of parameter optimization, the number of times of starting and stopping of the bin bottom belt 4 per hour is about 80, and each time of starting the bin bottom belt 4 is a loaded starting. After the belt is used for a long time, the tension of the belt can be reduced, so that the friction between the belt and the driving roller is reduced, and the bottom belt 4 of the storage bin can slide relatively at the starting moment, which is commonly called slipping. Under the condition, the material can not be driven by the bin bottom belt 4 to move forward and fall onto the steep angle belt 6, so that the material of the steep angle belt 6 is cut off, and the material flow on the control type electronic scale 2 is reduced and cannot reach a set value. At this time, the material level in the metering tube 1 is lower than the low-level photocell 10 of the metering tube 1, and the low-level photocell 10 controls the steep angle belt 6 to run at a high speed, but the material cannot be conveyed to the steep angle belt 6 by the bin bottom belt 4, so that the control type electronic scale 2 finally stops. The reason for the flow break is that on one hand, the belt is a PVC product, the service time is long, the tension of the belt is reduced, the friction force between the contact surface of the driving roller and the belt is reduced, so that the belt conveyor slips or loses rotation, and on the most important, when the slip trend occurs, no prediction and alarm are carried out, so that the fault is further expanded. On the other hand, less material is in the grain bin, which causes insufficient feeding of the steep angle belt 6 and also can cause cutoff of the steep angle belt 6. According to actual statistics of production, a material buffer area 7 is arranged between the bin bottom belt 4 and the steep angle belt 6, and the material buffer area 7 can store part of materials. By arranging the material buffer area 7, the time for allowing the bin bottom belt 4 to be incapable of feeding is 30 seconds, when the time for slipping the bin bottom belt 4 exceeds 30 seconds, production flow interruption can be caused, the stability of the product quality is seriously affected, and the energy consumption is i