Control method for linting production line

Abstract

The present invention discloses a control method for a depilation production line, which defines the components acting on the hair seeds in the depilation production line as working components, and the components providing power to the working components as power machines; the rotation speed of the working components and the operating current of the power machines are monitored in real time; if the rotation speed of a certain working component is lower than the allowable rotation speed lower limit, and the corresponding power machine's operating current exceeds the allowable current upper limit for a continuous time exceeding a preset first threshold, the power machine and the power machine of the preceding process equipment are stopped, and an alarm signal is output; if a certain working component operates within the allowable rotation speed range, and the corresponding power machine's operating current is lower than the allowable current lower limit for a continuous time exceeding a preset second threshold, the power machine is frequency-reduced within a predetermined long period of time, the operating frequency of the power machine of the preceding process equipment is increased, and then the predetermined operating frequency of each power machine is automatically restored. The depilation production line control method based on the present invention is easy to obtain better processing effects.

Description

Technical Field

[0001] The invention relates to a method for controlling a depilation production line. Background Art

[0002] With the development of the times and the advancement of technology, machines are replacing manual labor, manual monitoring of machines, and the automation, digitization, and intelligence of production and processing industries are the development trends of the times. In the field of cottonseed delinting, the automation control of the production line is also imperative and has developed to a certain stage.

[0003] Relatively speaking, earlier cotton processing lines were labor-intensive, inevitably facing a number of problems, primarily low levels of equipment automation, high labor intensity, significant safety hazards, unstable production, and high energy consumption. However, the potential for improvement in various cotton processing lines is enormous. With the development of large-scale, intensive, and automated delinting lines, older production lines will inevitably be eliminated, achieving high-quality output, requiring fewer people, reducing workloads, improving production efficiency, lowering production costs, and shortening processing cycles, thereby saving social resources and creating social benefits.

[0004] The above summary points out the two main reasons why the delinting production line needs to be automated. The technical details are not mentioned. However, it should be understood that automation in the field of cotton processing machinery is mechatronic, and it is necessary to consider the four elements of mechatronics, or the basic composition of mechatronic equipment, specifically the acquisition elements, intelligent elements, conversion elements and mechanism elements. The mechanism elements and conversion elements are traditional mechanical equipment parts. The intelligent elements are usually PLCs, single-chip microcomputers, controllers and other control devices commonly used in cottonseed processing equipment. The acquisition elements mainly include various sensors to sample the industrial site, so as to control the action of the mechanism elements through the calculation of intelligent elements and the conversion elements.

[0005] Currently, cottonseed delinting equipment is constantly being improved, with automation, intelligence, and digitization being the areas of development. The traditional cottonseed delinting process includes seed feeding, seed cleaning, delinting, delinting, delinting, delinting, delinting, and delinting and packaging, with different processes requiring different equipment. The current cottonseed delinting process upgrade adds signal collection components, a data central processing unit, data output, and an actuator. This allows for unmanned operation of the cottonseed delinting production line, automatic output balancing, automatic control of product quality, automatic calculation of energy consumption ratios, and timely uploading of processing parameters. However, the current automation of delinting production lines is still at a relatively low level. The intelligent elements rely on relatively simple data collection elements, while there are relatively many factors affecting delinting efficiency and quality.

[0006] For example, Chinese patent document CN105862136A discloses an automatic control method for a cottonseed delinting machine. This method relies on the moisture content of the incoming raw seeds collected offline, as well as the torque and optimal speed of each delinting drum at each level. Since the moisture content is collected offline, and the moisture content of the raw seeds at different locations in the raw seed pile varies; the torque is relatively difficult to collect and is not very representative, because the processing state is often the resistance torque, and it is difficult to directly measure the resistance torque, while torque measurement is usually of little value. More importantly, the factors that affect the efficiency of raw seed delinting are often multifaceted, and the parameters of the raw seeds themselves often have a relatively small impact, while the conveying state and processing state of the seed cotton have a relatively large impact.

[0007] Chinese patent document CN203191861U discloses a frequency automatic adjustment system for the seed feeding mechanism of a depilator. The seed feeding mechanism is obviously a mechanism for adjusting the feeding speed of the depilator. The technical condition for adjusting its frequency is the working current of the main depilator motor. After research, it was found that since the driving voltage is a relatively stable working parameter, when there are relatively more hairy seeds, under the condition of unchanged working frequency, the working current of the motor will increase, thereby increasing the output power and increasing the torque of the depilator mechanism driven by the main motor. Without considering whether the motor will be burned due to excessive current, the current parameter based on this adjustment method is relatively representative. However, as mentioned above, the depilator production line involves many process equipment and many factors that affect the depilator effect. Adjustment of working parameters based on a single factor is often ineffective. Summary of the Invention

[0008] The object of the present invention is to provide a control method for a depilation production line which is easy to obtain better processing effects.

[0009] According to an embodiment of the present invention, a control method for a lint stripping production line is provided, wherein the components acting on the lint seeds in the lint stripping production line are defined as working components, and the components providing power to the working components are defined as power machines;

[0010] Real-time monitoring of the speed of working parts and the working current of the power machine;

[0011] If the speed of a certain working component is lower than the allowable lower speed limit, and the working current of the corresponding power machine exceeds the allowable upper current limit for a continuous time exceeding a preset first threshold, the power machine and the power machine of the preceding process equipment are stopped, and an alarm signal is output;

[0012] If a working component operates within the allowable speed range and the working current of the corresponding power machine is lower than the allowable current lower limit for a continuous time that exceeds a preset second threshold, the power machine will be frequency-reduced within a predetermined long period of time, and the operating frequency of the power machine of the preceding process equipment will be increased, and then the predetermined operating frequency of each power machine will be automatically restored.

[0013] Optionally, the depilatory machine configured in the depilatory production line is equipped with a buffer box;

[0014] The buffer box is equipped with a material level detection element;

[0015] After the depilation production line is started, the depilation machine is in a stopped state. When the material in the buffer box reaches the preset material level, the depilation machine starts;

[0016] If the material level in the buffer box of the working depilator is lower than the preset minimum material level for a predetermined long period of time, the current depilator is paused.

[0017] Optionally, the material level detection element of the buffer box is an in-place detection element, and is adapted for low, medium and high material level detection;

[0018] After the depilator is started, it enters a stable operating state. When the material in the buffer box reaches the preset middle or high position, the feeding roller configured for the depilator starts feeding the material to the depilator.

[0019] Optionally, the depilation production line is equipped with several depilation machines arranged in parallel, which are arranged in sequence in a parallel direction by means of overflow, and an overflow box is provided at the end of the parallel direction;

[0020] An overflow material level detection device is set in the overflow box. If the overflow material level is higher than the preset high material level;

[0021] Correspondingly, if there is no material in the overflow box or the material is below the preset low material level, the front-stage process equipment of the depilator feeds the material at the first speed;

[0022] If the material in the overflow box reaches the preset middle level, the front-stage process equipment of the depilator will feed the material at the second speed;

[0023] If the material in the overflow box reaches the preset high material level, the front-stage process equipment of the depilator will feed the material at the third speed;

[0024] The third feeding speed is less than the second feeding speed, the second feeding speed is less than the first feeding speed, and the second feeding speed is the working feeding speed.

[0025] Optionally, the depilation production line is equipped with a central control element and a local control element, wherein the local control element is configured at the depilation machine and the control rights of the local control element and the central control element are mutually exclusive in the same period;

[0026] Accordingly, the depilating machine has an automatic mode controlled by a central control element and a manual mode controlled by a local control element. When in manual mode, the detection element configured in the depilating machine uploads the detected data to the local control element, and when in automatic mode, the detection element configured in the depilating machine uploads the detected data to the central control element.

[0027] Optionally, provide a handheld industrial computer connected to the stripping production line;

[0028] The operator holds the handheld industrial computer to manually input control instructions for the depilation production line;

[0029] The operator needs to obtain the operating authority of the handheld industrial computer through the host computer containing the central control component.

[0030] Optionally, the handheld industrial computer is connected to the depilation production line in a wireless manner.

[0031] Optionally, the permissible initial rotation speed range of the working component is set based on offline data, historical data or empirical data of the raw seeds;

[0032] After the depilator has been working for 10 to 15 minutes, the speed range of each working component is adjusted according to the current load of the depilator, and the adjusted speed range is used as the constraint range of the working speed of the working component.

[0033] Optionally, the feeding mechanism on the feeding side of the depilatory production line is equipped with a feeding box, the feeding box is adapted to be equipped with a feeding material level detection element, and a multi-position indicator light group is provided for intuitive observation of the material level of the feeding box.

[0034] Optionally, a Mars probe and a video surveillance system are adapted, wherein the Mars probe is bound to its location, and when a Mars or flame is detected, the corresponding location information is included in the alarm information.

[0035] In embodiments of the present invention, control is also based on, for example, the operating current of the power machine, but is also linked to the rotational speed of the working components. This is because the rotational speed of the working components may correlate with the operating current in some cases, but not in others. For example, the rotational speed of the working components may be exactly the same in normal operation and in idle state, but the operating current may vary. However, if the working components are not rotating due to, for example, a disengaged transmission chain or a blockage, the operating current of the power machine may be completely different in these two situations. Therefore, combining the operating current of the power machine and the rotational speed of the working components can better control the operating state of the velvet production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 1 is a flow chart of a depilation process in one embodiment.

[0037] Figure 2 This is a network topology diagram of a lint stripping production line in one embodiment. Implementation Method

[0038] It should be noted that in the cotton processing field, which is a key concern for fires, spark (flame) and smoke monitoring, at least under unattended conditions, is a necessary feature. Monitoring of cotton processing field conditions has also gradually become a routine monitoring task. Examples include monitoring the operating conditions of various power machines and monitoring the operating conditions of output terminals, such as cleaning rollers. The embodiments of the present invention focus on monitoring results as fundamental factors, with less attention paid to how these factors are obtained. However, it should be noted that obtaining the relevant fundamental factors is straightforward, or is well known, in the art. Unless necessary, the embodiments of the present invention will not further elaborate on how to obtain the relevant fundamental factors.

[0039] Figure 1 This is a flowchart of a depilation process adapted to the intelligent control system of a depilation production line in one embodiment, which roughly shows the basic structure of the depilation production line in a material flow manner, as well as some collection components for collecting on-site working conditions.

[0040] exist Figure 1 In the example shown, the control system of the lint stripping production line mainly includes:

[0041] 1) Upper industrial computer;

[0042] The upper industrial computer uses an industrial computer or PLC as the core processing unit, and can also be equipped with an industrial computer and a PLC at the same time, in which the industrial computer serves as the host and the PLC serves as the expansion machine; in some embodiments, the industrial computer can serve as the upper computer of the PLC, and the PLC includes a PLC host and several PLC expansion machines.

[0043] The upper industrial computer is the central processing unit of the entire stripping production line and is generally located in the main control room. The start, stop and power output of all equipment in the stripping production line can be adjusted by the upper industrial computer.

[0044] It should be noted that the upper-level industrial computer, as an assembly, may include not only logic control units such as a PLC but also a control console for facilitating manual control by the operator. The control console may be equipped with several mechanical switches, which can be included in the upper-level industrial computer. For example, a start / stop button group can control the main switch and the main circuit of the power machine.

[0045] For example, an industrial computer can generate control commands through mouse clicks, or input them through keyboard input. Furthermore, a handheld controller can be configured on the industrial computer side, connected to the industrial computer via a data cable, allowing operators to enter commands and change the operating parameters of selected equipment.

[0046] In an embodiment of the present invention, the various detection elements distributed on site are collectively referred to as detection devices, and the detection signals of each detection device are transmitted to the control elements of the upper industrial computer through, for example, an industrial field bus, a signal line or other lines used for signal transmission for data processing; the data can be uploaded in real time or in a predetermined time window.

[0047] In addition, the data uploaded to the upper control machine can be the original data collected by the detection element or the processed secondary data.

[0048] The upper industrial computer processes the data collected by each detection element according to a predetermined algorithm, obtains judgment data, and determines whether to adjust the working state of the target device. If adjustment is required, a control signal is generated and output to the device execution element, and the operation state of the target device is adjusted by the execution of the execution element.

[0049] The above is consistent with the general structure of electromechanical equipment. The basic structure and function of electromechanical equipment have been mentioned in the previous article and will not be repeated here.

[0050] Some working parameters, such as current, speed, frequency, etc., in addition to being the basis for adjusting the corresponding equipment, can also be intuitively displayed on the display device equipped with the upper industrial computer for evaluation by operators. It should be noted that although the current values of certain working parameters are within the predetermined range, it does not mean that they are currently in normal working condition. Whether the equipment is working normally depends on multiple factors, and the impact of multiple factors on the working condition of the equipment is not currently in a state of precise control, or in other words, through automatic control and with a reliable basis, and what kind of accurate correlation exists between the basis and the working condition of the equipment.

[0051] Therefore, the working parameters such as current, speed, frequency detected by each device and each detection point are displayed in real time on the display of the control platform, so as to facilitate manual real-time supplement of the depilatory machine production line, the equipped equipment, etc. or the operations that cannot be achieved through preset programs, thereby realizing human-machine complementarity and improving the stability and reliability of the intelligent control system of the depilatory production line.

[0052] While setting up a fixed industrial computer (i.e., the upper industrial computer), you can also set up a handheld industrial computer that is wirelessly connected to the upper industrial computer, so that workers can start and stop the equipment on site and in real time when repairing the equipment, avoiding running back and forth or missing the best time to stop the equipment due to inadequate observation.

[0053] It should be noted that when debugging or repairing equipment, workers often need to leave the control room. At this time, they cannot control the equipment through the console in the control room. However, they can complete the corresponding control through a handheld industrial computer, which is conducive to debugging or repairing the equipment on site.

[0054] It should be known that currently industrial sites can access various bus devices through fieldbuses, etc. At the same time, with the development of technology, industrial-grade wireless networks have gradually been deployed. For example, industrial-grade wireless networks with industrial wireless access points as key nodes. The industrial wireless access points are suitable for wireless switches for industrial field wireless networking and implement the IEEE802.11 standard. Handheld industrial computers can access the industrial network through the industrial wireless access points deployed at the industrial site. If the site is small, without using industrial wireless access points, simply relying on a non-expanded wireless router can meet the communication requirements. At this time, the handheld industrial computer accesses the industrial network through the wireless router.

[0055] To ensure safe production, handheld industrial computers need to obtain operating permissions from the host industrial computer.

[0056] Regarding operating permissions, you can use pre-authorization and then password login, that is, bind one or more handheld industrial computers on the upper industrial computer side, with different IDs and passwords, and log in on the handheld industrial computer side. After logging in, the handheld industrial computer operates according to the permissions pre-set by the ID.

[0057] In some implementations, in order to avoid the relative limitations of pre-set permissions, administrator permissions can be temporarily granted. After the corresponding handheld industrial computer is connected to the industrial network, the permissions need to be granted on the control room side based on the application of the handheld industrial computer.

[0058] 2) Each velvet stripping machine is equipped with a separate controller when it leaves the factory.

[0059] Each depilatory machine is equipped with an independent control unit, which is usually an inherent configuration rather than an additional configuration during the assembly line. The corresponding control unit can be referred to as a slave computer here. The independent control unit can communicate with the upper industrial computer through an industrial switch to achieve dual control of the depilatory machine, that is, local or remote. Local control is achieved by the slave computer, and remote control is achieved by the upper computer. In some embodiments, based on the centralized-decentralized mechanism, the slave computer and the upper computer can be divided into two parts. For example, if the depilatory machine side takes real-time considerations and needs to form a closed-loop control system with its own elements, the control can be completed locally, while if it needs to integrate external factors, the control is completed by the upper computer.

[0060] Industrial switches can be wireless or wired. To ensure reliability, wired switches are preferred, such as lint stripping machines. Wireless switches can be used for devices that do not require frequent data uploads, such as the aforementioned handheld industrial computers.

[0061] In a preferred embodiment, the separate control unit of the depilator has automatic and manual shift positions to achieve different control modes.

[0062] Correspondingly, when the gear on the separate controller of the velvet stripping machine is turned to the automatic gear, the velvet stripping machine is controlled by the upper industrial computer.

[0063] When the gear on the controller equipped with the velvet stripping machine is turned to the manual gear, the upper industrial computer cannot control the velvet stripping machine. The velvet stripping machine is only controlled by the equipped controller, which is conducive to independent control of the velvet stripping machine, so that the current velvet stripping machine can be repaired or debugged.

[0064] The depilator is equipped with a temporary storage box for temporarily storing materials to buffer the raw seeds and reduce the unevenness of the raw seed conveying rate of the previous process equipment. After a certain amount of raw seeds are temporarily stored in the temporary storage box, the feeding rate of the raw seeds will be relatively uniform when feeding the working mechanism of the depilator.

[0065] Furthermore, a first detection device is provided on the box body of the temporary storage box, and the storage amount of the hair seeds in the temporary storage box is detected by the first detection device, which serves as a basis for judging whether to automatically start or stop the depilator.

[0066] The first detection device can be a photoelectric sensor, such as a through-beam photoelectric sensor, which is arranged on the empty side of the incoming material jet flow to reduce the impact of flying materials.

[0067] In some embodiments, the first detection device may be a pressure sensor, which is disposed at the bottom of the temporary storage box and determines the storage amount of the raw seeds in the temporary storage box based on the detection of the total weight of the temporary storage box.

[0068] In some embodiments, a first high-level detection switch and a first low-level detection switch are provided on the temporary storage box of the depilator. For example, in addition to the aforementioned photoelectric sensor, the first high-level detection switch can also be a limit switch. The push rod of the limit switch is located at the bottom, and the position of the material is monitored by the support of the material. Obviously, when the material accumulation reaches the position of the limit switch, the material will support the push rod upward; similarly, when the material decreases, the material pile is lowered, and the limit switch is reset.

[0069] Correspondingly, when the first low-level detection switch detects the material, the automatic start-up conditions of the depilator are met and the depilator starts to start; in other words, before the first low-level detection switch detects the material, the preceding process equipment has been started for a certain period of time, and the depilator is delayed to start, thereby reducing overall energy consumption.

[0070] If the entire production line is in normal working condition, even if the first low-level detection switch cannot detect the material, the depilator will not stop, but its working frequency or working speed can be reduced, or the feeding capacity of the preceding process equipment can be increased.

[0071] In order to alleviate the problems that may be caused by frequent starting, for example, a clutch device can be configured on the transmission chain between the rotor of the depilator and the power machine (usually an electric motor). Through clutch control, the rotor of the depilator stops working without stopping the power machine, thereby reducing the energy consumption of the power machine.

[0072] Then, when the depilator starts and enters a stable operation state and the first high-level detection switch detects the material, the feeding roller on the upper part of the depilator starts to feed the depilator;

[0073] When the depilator is started and the first low-level detection device cannot detect any material, in some embodiments the depilator can automatically stop to save energy.

[0074] As mentioned above, when the gear on the separate controller of the velvet stripping machine is turned to the manual gear, the signal of the first detection device cannot be used as a basis for the controller of the velvet stripping machine to determine whether to start or stop.

[0075] 3) A speed detection device consisting of a photoelectric switch and a counter is installed at the key equipment as the second detection device. The aforementioned counter can be a rotary encoder.

[0076] In mechanical processing and production, the vast majority of kinetic energy is transferred through shaft rotation. The rotational state of the drive shaft, or its speed, is a crucial indicator of the equipment's operating status. For example, conveying equipment (such as augers, scrapers, and elevators), velvet collectors, and velvet cleaners require speed detection devices on their main drive shafts. Rotary encoders (a type of photoelectric sensor) are preferred for speed detection, as they accurately measure the shaft's speed. The current value detected by the speed detection device determines the equipment's operating status, preventing idling due to transmission failure, and preventing serious material accumulation and blockage caused by equipment failure or internal jamming.

[0077] Therefore, further, regarding the setting position of the rotary encoder, for example, given that the transmission chain between the rotor and the power machine of some equipment is relatively long, the most representative is still the working part of the equipment, such as the shaft of the cleaning machine nail roller.

[0078] For example, the size of the cleaning machine's load will affect its power machine, such as the working current of the motor. If there is a lot of material, the working current will become larger, and if there is less material, the working current will become larger. If, for example, the nail roller stops due to material blockage, the working current may suddenly become large enough to burn the motor. Therefore, by monitoring the working current of the power machine, the working status of the working parts can be roughly reflected.

[0079] However, as mentioned above, since the transmission chain is disengaged, causing the working parts to stop rotating, simply detecting the working current of the power machine is often unable to find the problem. Therefore, in a preferred embodiment, the rotation speed of the working parts and the working current of the power machine are monitored in real time.

[0080] Accordingly, if the speed of a working component is lower than the allowable lower speed limit, and the working current of the corresponding power machine exceeds the allowable current upper limit for a continuous time exceeding the preset first threshold, the power machine and the power machine of the preceding process equipment are stopped, and an alarm signal is output.

[0081] If a working component operates within the allowable speed range and the working current of the corresponding power machine is lower than the allowable current lower limit for a continuous time that exceeds a preset second threshold, the power machine will be frequency-reduced within a predetermined long period of time, and the operating frequency of the power machine of the preceding process equipment will be increased, and then the predetermined operating frequency of each power machine will be automatically restored.

[0082] Optionally, a rotary encoder, for example, can be added to the transmission tail of key equipment such as conveying equipment and cleaning equipment as a speed detection device. This allows real-time monitoring of the equipment's operating status, effectively preventing a series of other abnormalities that may occur when the equipment experiences operational anomalies. Regarding the speed detection of working components, indirect methods can also be used, such as using a potentiometer to detect the torque of the spike roller shaft.

[0083] Correspondingly, when the speed detected by the speed detector is less than the set value, it indicates that the transmission of the equipment is in an abnormal state; when the speed detected by the speed detector is less than the set value, all the preceding equipment of the equipment stops continuing to convey the material, and at the same time, the feeding box stops or reduces the feeding speed.

[0084] When the speed detected by the speed detector is lower than the set value and the alarm device sounds a warning sound, patrol technical workers are required to immediately go and check the relevant problems of the equipment.

[0085] Accordingly, for example, the monitors in the monitoring room can be equipped with force control software to assist the staff in making judgments. In some embodiments, an alarm device can be configured to sound an alarm when the system detects a fault, prompting the staff to check the relevant equipment in a timely manner.

[0086] When the speed detected by the speed detector is less than the set value, the power supply to the equipment is cut off to prevent the power source from burning out due to excessive current. At this time, detecting the operating current of the equipment power supply, i.e., the power supply of the power machine, becomes a necessary step. Current detection can be carried out by connecting an ammeter in series with the main circuit of the power machine. Alternatively, non-contact detection can be performed without connecting to the circuit, such as using a current transformer.

[0087] 4) Add a current detection device as a third detection device to the main circuit of each power source to monitor the operation of each power source in real time. The power source is the electric motor. The third detection device is placed on the main circuit side of the motor. It can use the series ammeter / meter method described above, or a non-contact current transformer for current detection.

[0088] The increased current indicator for all power devices displays the current flowing through each power device in real time. By setting current intervals for each power device, if the current value is outside of the interval, it indicates that an unexpected situation has occurred with the power source, requiring the power source to be shut down and the material transportation of the upstream related equipment to be stopped. Given that the operating current fluctuates during operation, and short-term fluctuations are normal, a device failure is only likely to occur if the current remains high for a continuous period exceeding a predetermined time. Therefore, it is necessary to set a threshold for, for example, the continuous duration that the operating current exceeds a certain value to avoid false fault alarms or reduce the false alarm rate.

[0089] Correspondingly, when, for example, the current value detected is not within the set range and remains so for a short period of time (e.g., 5 seconds), the main circuit of the power source is disconnected and the power supply is stopped, all its preceding equipment stops working, the feeding box stops feeding or reduces the feeding speed, and an alarm is sounded at the same time so that patrol personnel can quickly go to check the cause of the abnormality;

[0090] 5) The feed box, which is the starting point of the depilation process, can be a seed feeder. Essentially, it is a storage box that continuously provides the production line with initial raw materials. Whether the initial raw materials are sufficient determines whether the depilation machines in the workshop can be fully powered and fully utilized, and the depilation production line can fully utilize its capacity.

[0091] Among them, the feeding box is provided with a fourth detection device and a corresponding indicator light, the purpose of which is to prompt the existing cotton seed storage amount in the box, so as to facilitate engineering vehicles to replenish the cotton seeds in the feeding box in time.

[0092] The fourth detection device is also a material level detection device, so it can refer to the material level detection device of the buffer box equipped with the depilator. The only difference is that the alarm device is directly installed on the side of the feeding box, which is convenient for the driver on the engineering vehicle to observe.

[0093] However, for the fourth detection device, the collected data can be uploaded to the host computer to facilitate the integration of the overall control.

[0094] Optionally, the fourth detection device includes a fourth low-position detection device, a fourth middle-position detection device and a fourth high-position detection device and corresponding fourth low-position indicator light, fourth middle-position indicator light and fourth high-position indicator light.

[0095] Correspondingly, when the fourth low-level detection device detects no material, the fourth low-level indicator light turns on;

[0096] When the fourth mid-position detection device cannot detect any material, the fourth mid-position indicator light turns on;

[0097] When the fourth high-level detection device cannot detect any material, the fourth high-level indicator light will light up.

[0098] Optionally, when all three indicator lights are off, the engineering vehicle stops replenishing the cottonseed material to the feeding box;

[0099] When an indicator light comes on, the engineering vehicle slowly replenishes the cottonseed material to the feed box;

[0100] When the two indicator lights are on, the engineering vehicle will refill the cottonseed material to the feed box at a medium speed;

[0101] When the three indicator lights are on, the engineering vehicle will quickly refill the feeding box with cottonseed material;

[0102] Optionally, the meaning of the indicator light on and off can be adjusted accordingly according to local habits and customs.

[0103] Optionally, when the feeding box needs to be emptied and cottonseed material does not need to be replenished in the feeding box, the indicator light needs to be manually controlled to be always on or always off, so as to notify the engineering vehicle to stop feeding the feeding box.

[0104] Among them, the first low-position detection device is located at one-fifth to one-third of the height of the cache box; the first mid-position detection device is located at three-sevenths to four-sevenths of the height of the cache box; and the first high-position detection device is located at seven-tenths to four-fifths of the height.

[0105] 6) In order to make the intelligent control system of the stripping production line run more stably and reduce the intensity of manual labor, a fire alarm system and a video monitoring system are added to assist manual labor and the smooth operation of the intelligent control system of the stripping production line.

[0106] The fire control system relies on spark detectors installed in multiple locations to detect whether fires are found at key points within the production line.

[0107] Optionally, a Mars probe is provided at the velvet stripping machine, the velvet collecting duct, the velvet cleaning machine, the inlet and outlet of the fan, etc.

[0108] If the Mars probe detects sparks or flames, the fire alarm host will sound an alarm and notify the location where the Mars probe is detected, so that staff can quickly rush to the fire site for secondary confirmation and take countermeasures.

[0109] The video monitoring system relies on monitoring probes installed at various key points in the workshop to provide real-time feedback on the operation status of equipment in the workshop to the control room, so that operators can set the corresponding data parameters of the stripping system in time.

Claims

1. A control method for a lint stripping production line, characterized in that: The parts that act on the hair seeds in the depilation production line are defined as working parts, and the parts that provide power to the working parts are defined as power machines; Real-time monitoring of the speed of working parts and the working current of the power machine; If the speed of a certain working component is lower than the allowable lower speed limit, and the working current of the corresponding power machine exceeds the allowable upper current limit for a continuous time exceeding a preset first threshold, the power machine and the power machine of the preceding process equipment are stopped, and an alarm signal is output; If a working component operates within the allowable speed range and the working current of the corresponding power machine is lower than the allowable current lower limit for a continuous time that exceeds a preset second threshold, the power machine will be frequency-reduced within a predetermined long period of time, and the operating frequency of the power machine of the preceding process equipment will be increased, and then the predetermined operating frequency of each power machine will be automatically restored.

2. The control method of the depilation production line according to claim 1, characterized in that: The depilatory machine configured in the depilatory production line is equipped with a buffer box; The buffer box is equipped with a material level detection element; After the depilation production line is started, the depilation machine is in a stopped state. When the material in the buffer box reaches the preset material level, the depilation machine starts; If the material level in the buffer box of the working depilator is lower than the preset minimum material level for a predetermined long period of time, the current depilator is paused.

3. The control method of the depilation production line according to claim 2, characterized in that: The material level detection element of the buffer box is an in-place detection element, and is suitable for low, medium and high material level detection; After the depilator is started, it enters a stable operating state. When the material in the buffer box reaches the preset middle or high position, the feeding roller configured for the depilator starts feeding the material to the depilator.

4. The control method of the lint stripping production line according to claim 3, characterized in that: The depilation production line is equipped with several depilation machines arranged in parallel, which are arranged in sequence in the parallel direction by overflowing, and an overflow box is set at the end of the parallel direction. An overflow material level detection device is provided in the overflow box; Correspondingly, if there is no material in the overflow box or the material is below the preset low material level, the front-stage process equipment of the depilator feeds the material at the first speed; If the material in the overflow box reaches the preset middle level, the front-stage process equipment of the depilator will feed the material at the second speed; If the material in the overflow box reaches the preset high material level, the front-stage process equipment of the depilator will feed the material at the third speed; The third feeding speed is less than the second feeding speed, the second feeding speed is less than the first feeding speed, and the second feeding speed is the working feeding speed.

5. The control method for a depilation production line according to any one of claims 2 to 4, characterized in that: The depilation production line is equipped with a central control unit and a local control unit. The local control unit is located on the depilation machine and its control rights are mutually exclusive with those of the central control unit in the same period. Accordingly, the depilating machine has an automatic mode controlled by a central control element and a manual mode controlled by a local control element. When in manual mode, the detection element configured in the depilating machine uploads the detected data to the local control element, and when in automatic mode, the detection element configured in the depilating machine uploads the detected data to the central control element.

6. The control method of the depilation production line according to claim 5, characterized in that: Provide handheld industrial computers connected to the depilation production line; The operator holds the handheld industrial computer to manually input control instructions for the depilation production line; The operator needs to obtain the operating authority of the handheld industrial computer through the host computer containing the central control component.

7. The control method of the depilation production line according to claim 6, characterized in that: The handheld industrial computer is connected to the depilatory production line in a wireless manner.

8. The control method of the lint stripping production line according to claim 1, characterized in that: Set the initial allowable speed range of the working parts based on offline data, historical data or empirical data of the raw seeds; After the depilator has been working for 10 to 15 minutes, the speed range of each working component is adjusted according to the current load of the depilator, and the adjusted speed range is used as the constraint range of the working speed of the working component.

9. The control method of the lint stripping production line according to claim 1, characterized in that: The feeding mechanism on the feeding side of the stripping production line is equipped with a feeding box. The feeding box is equipped with a feeding material level detection element and a multi-position indicator light group for intuitive observation of the material level of the feeding box.

10. The control method of the lint stripping production line according to claim 1, characterized in that: Adaptable to Mars probes and video surveillance systems, where the Mars probe is bound to its location, and when a Mars or flame is detected, the alarm information issued contains the corresponding location information.

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