Polyolefin uv aging resistant master batch precision metering feeding system

Abstract

The application discloses a polyolefin anti-UV aging master batch precision metering feeding system applied to the field of feeding systems, which is composed of a device end and a system end, the device end comprises a storage tank, a material conveying unit, a bidirectional material conveying screw, a feeding channel, a weight metering unit and a compensation unit, a cleaning ring and a blowing nozzle are arranged in the feeding channel, and the feeding channel can automatically clean the residual on the pipe wall; the system end realizes real-time monitoring and intelligent regulation and control of the feeding process through data acquisition, metering, early warning analysis and control modules, the system adopts a hierarchical early warning mechanism, and compensation strategies or equipment correction strategies are respectively executed according to different deviation degrees, the problem of low metering precision of the traditional feeding mode is effectively solved, the precision of master batch addition and the stability of the production process are significantly improved, and the anti-UV aging performance of polyolefin products is ensured.

Description

Technical Field

[0001] This invention relates to the field of feeding systems, and in particular to a precise metering feeding system for polyolefin UV-resistant aging masterbatch. Background Technology

[0002] In the field of plastic waste recycling, polyolefin materials, even after recycling and regeneration, still face the challenge of aging caused by ultraviolet radiation when used outdoors. The mechanical properties and service life of these recycled materials will significantly decrease due to the photo-oxidative degradation process. Therefore, it is necessary to add specialized anti-UV aging masterbatch to effectively improve the weather resistance of recycled plastics and ensure their stability and reliability in long-term outdoor use. In traditional recycling granulation processes, the addition of masterbatch (such as color masterbatch, functional masterbatch, etc.) used to improve or enhance performance usually relies on two basic operating methods: one is to use volumetric feeding equipment to control the amount added by measuring the volume of material; the other is to rely entirely on manual addition.

[0003] Chinese invention CN118811428B discloses a sealed loss-in-weight color masterbatch feeder. This invention can stir and vibrate the color masterbatch through the feeding component, thereby avoiding accumulation in the feeding component and affecting continuous conveying operation. The feeding component can convey and feed the color masterbatch in two states, thereby improving the feeding accuracy.

[0004] Chinese invention CN117088128B discloses an adjustable feeding device for polyamide particles and masterbatches. It can convert the magnetism of an adjustable electromagnet into a weight parameter to achieve accurate metering and avoid the influence of particle diameter. By designing a second motor with adjustable height, it can move masterbatches of different diameters.

[0005] The existing technology for feeding polyolefin anti-UV aging masterbatch has the problem of low metering accuracy: during the conveying process, the actual amount of masterbatch added may deviate from the set value due to blockage or dust emission, which in turn affects the consistency of anti-UV performance. Summary of the Invention

[0006] The core of this invention lies in solving the problem of low metering accuracy in the feeding of polyolefin anti-UV aging masterbatch in existing technologies through high-precision loss-in-weight metering and an intelligent closed-loop control system. Simultaneously, it integrates graded early warning and automated operation and maintenance functions to achieve real-time monitoring, anomaly warning, and automatic correction of the feeding process.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A precision metering and feeding system for polyolefin anti-UV aging masterbatch includes: an equipment end and a system end. The system end includes a data acquisition module, a metering module, a data analysis module, and a control module. The equipment end includes a storage tank. The output end of the storage tank is connected to a conveying unit. The output end of the conveying unit is connected to a bidirectional conveying screw. The output end of the bidirectional conveying screw is connected to a feeding channel. The output end of the feeding channel is connected to a weighing unit. The output end of the weighing unit is connected to a mixing device. The feeding channel includes a main pipe. The outer end of the main pipe is equipped with a dust discharge pipe for discharging dust. A cleaning ring for cleaning the inner wall is movably installed inside the main pipe. Multiple blowing nozzles are installed at the top of the feeding channel. The weighing unit is equipped with a weighing sensor; a compensation unit is connected between the input end of the weighing unit and the bidirectional feeding screw. The compensation unit includes a storage tank, and a quantitative feeding valve is connected between the storage tank and the weighing unit. The metering module compares the weighing unit with the target weight or historical data each time it is fed; the data analysis module analyzes the comparison data calculated by the metering module to determine the equipment status; and the control module executes preset strategies based on the analysis results of the analysis module. The preset strategies include compensation strategies for the weighing unit and equipment correction strategies.

[0009] Furthermore, the feeding channel is inclined, and the input end of the main body is connected to a feeding protrusion ring. When the cleaning ring is in the initial position, it is sleeved on the outside of the feeding protrusion ring. The main body is rotatably connected to a lead screw driven by a servo motor, and the cleaning ring is threadedly connected to the lead screw. When the cleaning ring moves along the inner wall of the main body, it does not contact the blowing nozzle.

[0010] Furthermore, the main body has multiple dust discharge holes that communicate with the dust discharge pipe, a dust sensor is installed inside the dust discharge pipe, and the output end of the dust discharge pipe is connected to the induced draft fan.

[0011] Furthermore, a sealing plate that is displaced by an electric push rod is provided on the top of the inner wall of the main body. The blowing nozzle is embedded in the top of the main body. When the sealing plate is in the initial position, the sealing plate blocks the output ends of multiple blowing nozzles, and the powder discharge holes are exposed. After the sealing plate is displaced by a set distance, the sealing plate blocks multiple powder discharge holes, and multiple blowing nozzles are exposed.

[0012] Furthermore, the input end of the weighing unit is equipped with a buffer guide plate, and an impact sensor is installed on the buffer guide plate.

[0013] Furthermore, the specific operations of the metering module for data comparison include: first, comparing the material weight measured at the weighing unit with the required target weight and calculating the difference between the two to obtain the current difference; then, retrieving the historical average weight measured in the weighing unit during the same target weight feeding process, calculating the difference between the actual material weight measured at the weighing unit and the historical average weight to obtain the historical deviation.

[0014] Furthermore, the specific operations performed by the data analysis module include: comparing the current difference with a set threshold, comparing the current difference with the current difference obtained in the previous feeding process, and comparing historical differences with preset thresholds.

[0015] Furthermore, after performing data analysis, the data analysis module also conducts graded early warnings. Specific operations include: comprehensive threshold comparison analysis, trend analysis, and correlation analysis to determine the early warning level of the feeding status. The early warning level is divided into three levels: mild early warning, moderate early warning, and severe early warning. A compensation strategy is executed for mild early warning; an equipment correction strategy is executed for moderate early warning; and an immediate shutdown and alarm is triggered for severe early warning.

[0016] Furthermore, when the control module executes the compensation strategy: firstly, based on the current difference calculated by the metering module, it precisely controls the quantitative feeding valve of the compensation unit to supplement the weighing unit with the corresponding weight of material to ensure that the total feeding amount meets the target requirements; after the compensation is completed, the system immediately detects the remaining amount of material in the storage box. If the remaining amount is lower than the preset standard value, it automatically triggers the bidirectional conveying screw to supplement the compensation unit with material until the storage box reaches the standard storage capacity.

[0017] Furthermore, when the control module executes the equipment correction strategy: first, it controls the powder discharge pipe to move along the inner wall of the main pipe to scrape and clean the masterbatch residue adhering to the pipe wall; then, it opens the blow nozzle to spray compressed air into the main pipe to blow the cleaned pipe wall. After blowing is completed, it draws air into the main pipe through the powder discharge pipe to remove suspended dust and residual particles. After the entire correction process is completed, the system automatically resumes feeding operations.

[0018] Compared with the prior art, the advantages of this invention are: (1) This solution uses high-precision weighing sensors to collect data in real time, and combines the metering module, target weight and historical data comparison analysis to judge the equipment status. When the equipment is abnormal, appropriate processing strategies can be adopted to control the equipment end for processing. During processing, the compensation unit can realize dynamic correction of feeding error or self-cleaning of the control feeding channel, effectively solving the problem of low metering accuracy of traditional feeding methods.

[0019] (2) This solution integrates automatic cleaning devices such as cleaning rings and spray nozzles to remove residues from the inner wall of the feeding channel in a timely manner; at the same time, it constructs a graded early warning mechanism to intelligently execute compensation or equipment correction strategies for different degrees of deviation, which significantly reduces the risk of blockage and ensures continuous and stable production process. Attached Figure Description

[0020] Figure 1 This is a perspective view of the device side of the present invention; Figure 2 This is a cross-sectional view of the device end of the present invention; Figure 3 for Figure 2 Schematic diagram of the structure at point A; Figure 4 This is a schematic cross-sectional view of the feeding channel of the present invention; Figure 5 This is a schematic diagram of the masterbatch conveying path during the operation of the equipment of the present invention; Figure 6 This is a system connection block diagram of the present invention; Figure 7 This is a system workflow diagram of the present invention; Figure 8 This is a schematic diagram of the hierarchical early warning working logic of the present invention.

[0021] Explanation of the labels in the diagram: 1. Storage tank, 2. Conveying unit, 3. Bidirectional conveying screw, 4. Feeding channel, 41. Main body, 411. Feeding ring, 412. Screw, 42. Powder discharge pipe, 43. Cleaning ring, 44. Spray nozzle, 5. Weighing unit, 6. Compensation unit, 61. Storage box, 62. Quantitative feeding valve, 7. Sealing plate. Detailed Implementation

[0022] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Example 1:

[0023] Please see Figures 1-7 A precise metering and feeding system for polyolefin anti-UV aging masterbatch includes an equipment end and a system end. The equipment end includes a storage tank 1, and the output end of the storage tank 1 is connected to a conveying unit 2. The conveying unit 2 is used to control the quantitative output of the storage tank 1. The system is installed using appropriate existing technology selected by those skilled in the art, such as a rotary feeder valve. The output end of the conveying unit 2 is connected to a bidirectional conveying screw 3, and the output end of the bidirectional conveying screw 3 is connected to a feeding channel 4. The output end of the feeding channel 4 is connected to a weighing unit 5, and the input end of the weighing unit 5 is connected to the bidirectional conveying screw 3. A compensation unit 6 is connected between the screws 3. The bidirectional screw 3 can convey the material output from the storage tank 1 in two directions, so that the bidirectional screw 3 can choose to convey the material to the feeding channel 4 or the compensation unit 6. The bidirectional screw 3 adopts existing technology, such as: GX type screw feeder; the weighing unit 5 adopts existing technology, and is installed by those skilled in the art using a suitable device to weigh the actual weight of the masterbatch before outputting it, such as: BP-S30S loss-in-weight feeder. The output end of the weighing unit 5 is connected to the mixing device. The feeding channel 4 includes a main body 41, with a dust discharge pipe 42 installed at the outer end of the main body 41 for discharging dust, a cleaning ring 43 for cleaning the inner wall is movably arranged inside the main body 41, and multiple blowing nozzles 44 are arranged at the top of the feeding channel 4. The weighing unit 5 is equipped with a weighing sensor; the input end of the weighing unit 5 is equipped with a buffer guide plate, and the buffer guide plate is equipped with an impact sensor.

[0024] The compensation unit 6 includes a storage tank 61, and a quantitative feeding valve 62 is connected between the storage tank 61 and the weighing unit 5.

[0025] See Figures 2-4 The feeding channel 4 is inclined. The input end of the main body 41 is connected to a feeding protrusion ring 411. When the cleaning ring 43 is in the initial position, it is sleeved on the outside of the feeding protrusion ring 411. The main body 41 is rotatably connected to a lead screw 412 driven by a servo motor. The servo motor is installed on the outer wall of the feeding channel 4. A transmission belt is connected between the power output shaft of the servo motor and the lead screw 412. The cleaning ring 43 is threadedly connected to the lead screw 412. A pair of guide rods that are slidably connected to the cleaning ring 43 are installed inside the main body 41. By driving the lead screw to rotate, the cleaning ring 43 moves along the inner wall of the main body 41, and the cleaning ring 43 does not contact the spray nozzle 44 when it moves. See Figure 4 The main body 41 has multiple dust discharge holes communicating with the dust discharge pipe 42. The dust discharge pipe 42 has a dust discharge channel communicating with the multiple dust discharge holes. A dust sensor is installed in the dust discharge pipe 42. The output end of the dust discharge pipe 42 is connected to the induced draft fan. The blower nozzle 44 is embedded in the top of the main body 41 and communicates with the dust discharge pipe 42. The dust discharge pipe 42 has an air supply channel communicating with the multiple blower nozzles 44. The dust discharge pipe 42 is connected to an air supply pipe for supplying air to the air supply channel and an air extraction pipe communicating with the dust discharge channel.

[0026] The top of the inner wall of the main body 41 is provided with a sealing plate 7 that is displaced by an electric push rod. When the sealing plate 7 is in the initial position, the sealing plate 7 blocks the output ends of multiple spray nozzles 44, and the powder discharge holes are exposed. After the sealing plate 7 is displaced by a set distance, the sealing plate 7 blocks multiple powder discharge holes, and the multiple spray nozzles 44 are exposed.

[0027] See Figure 5-7 The system includes a data acquisition module, a metering module, a data analysis module, and a control module. The metering module is used to compare the weighing unit 5 with the target weight or historical data each time it is fed; the data analysis module is used to analyze the comparison data calculated by the metering module and make a judgment on the equipment condition.

[0028] The specific operations of the metering module for data comparison include: first, comparing the material weight measured at weighing unit 5 with the required target weight and calculating the difference between the two to obtain the current difference (hereinafter, the difference between the actual weight and the target weight will be referred to as the current difference); then, retrieving the historical average weight measured in weighing unit 5 during the same target weight feeding process, calculating the difference between the actual material weight measured at weighing unit 5 and the historical average weight to obtain the historical deviation.

[0029] The specific operations performed by the data analysis module include: analyzing comparative data such as current differences and historical deviations transmitted by the metering module, cleaning the data, and removing obvious outliers; The current difference is compared with a set threshold. Specifically, the current difference after cleaning is compared with a preset threshold range. If the current difference is less than the set threshold, it is determined to be a normal feeding state, and feeding continues. If the current difference is within the set threshold range, it is marked as an abnormal state that needs attention, and a compensation strategy can be executed. If the current difference exceeds the set threshold, it is determined to be a serious abnormal state, and an equipment correction strategy is executed.

[0030] Historical Deviation vs. Preset Threshold Comparison: Compare the historical deviation with the preset historical threshold to analyze whether the historical deviation is within a reasonable fluctuation range. If the historical deviation exceeds the preset threshold, it indicates that there may be a potential problem with the feeding process at the target weight. In this case, a correction strategy can be implemented. Current Difference Trend Analysis: Collect current difference data from multiple consecutive feeds and plot a trend graph of the difference change. By analyzing the trend graph, determine whether the difference shows a stable, rising, falling, or fluctuating trend. For example, if the current difference continues to rise, it may indicate an equipment malfunction, requiring proactive measures, in which case a correction strategy can be selected.

[0031] Historical Deviation Trend Analysis: Retrieve historical deviation data for the same target weight feeding process and analyze the long-term trend of historical deviation. If the historical deviation shows a gradually increasing trend, it may mean that the equipment performance is gradually declining, requiring equipment shutdown and maintenance.

[0032] The control module is used to execute preset strategies based on the analysis results of the data analysis module. The preset strategies include a compensation strategy for the weighing unit 5 and an equipment correction strategy. When the control module executes the compensation strategy: First, based on the current difference calculated by the metering module, it precisely controls the quantitative feeding valve 62 of the compensation unit to supplement the weighing unit 5 with the corresponding weight of material, ensuring that the total feeding amount meets the target requirements; after the compensation is completed, the system immediately detects the remaining amount of material in the storage tank 61. If the remaining amount is lower than the preset standard value, it automatically triggers the bidirectional conveying screw 3 to supplement the compensation unit 6 with material until the storage tank 61 reaches the standard storage amount; the function of the compensation strategy is to precisely control the feeding speed of the compensation unit based on the difference between the current actual feeding amount calculated by the metering module and the set target feeding amount, correct the metering deviation in real time, and ensure the accuracy of the masterbatch addition ratio.

[0033] When the control module executes the equipment correction strategy: first, it controls the cleaning ring 43 to move along the inner wall of the main pipe 41 to scrape and clean the masterbatch residue adhering to the pipe wall; at the same time, the electric push rod pushes the sealing plate 7 to move, blocking the powder discharge hole and exposing the blow nozzle 44, and opens the blow nozzle 44 to spray compressed air into the main pipe 41 to blow the cleaned pipe wall and enhance the cleaning effect; after the blowing is completed, the sealing plate 7 is reset, the powder discharge hole is exposed again, and the blower draws air into the main pipe through the powder discharge pipe to extract the suspended dust and residual particles. The purpose of the correction strategy is to scrape off the masterbatch residue adhering to the wall of the main pipe 41, preventing the residual material from affecting the accuracy of subsequent feeding. After cleaning, the pipe wall is purged to further remove fine dust and particles, ensuring the cleanliness of the inner wall of the feeding channel. After purging, air is drawn into the main pipe through the powder discharge pipe to remove suspended dust and residual particles, preventing their accumulation in the pipeline. By implementing the equipment correction strategy in a timely manner, the metering error caused by masterbatch residue is prevented from increasing continuously, effectively improving the stability and accuracy of feeding polyolefin anti-UV aging masterbatch.

[0034] The operating steps of the system in this embodiment are as follows: The first step is to set the initial parameters, input the target weight for this feeding, preset the corresponding comparison threshold and historical deviation threshold according to the target weight, and at the same time confirm the initial material storage in the storage box 61. If the storage is insufficient, the material will be replenished in advance through the bidirectional feeding screw.

[0035] The second step is to start the regular feeding process. The feeding unit 2 conveys the polyolefin anti-UV aging masterbatch in the storage tank to the bidirectional feeding screw 3. The bidirectional feeding screw 3 feeds the masterbatch into the inclined feeding channel 4. The masterbatch slides down the feeding channel and enters the weighing unit 5. The buffer guide plate buffers the falling masterbatch and reduces the impact of the impact on the weighing result. Third, the weighing unit 5 completes the weight detection of this feeding through the built-in weighing sensor. The metering module compares the detected actual weight with the target weight to obtain the current difference. At the same time, it compares the difference between the actual material weight measured at the weighing unit 5 and the historical average weight to obtain the historical deviation, and transmits the data to the data analysis module.

[0036] The fourth step involves the data analysis module cleaning, threshold comparison, and trend analysis of the received data to determine the current feeding status of the equipment, and then outputting the analysis results to the control module.

[0037] Fifth, the control module executes the corresponding strategy based on the analysis results: If it is a normal feeding state, the masterbatch in the weighing unit 5 is directly sent to the mixing device to complete the feeding; if it is an abnormal state that needs attention, a compensation strategy is executed, and the quantitative feeding valve 62 is controlled to supplement the corresponding weight of masterbatch to complete the compensation based on the current difference. After compensation, it is sent to the mixing device, and the material storage in the storage box 61 is replenished at the same time; if it is determined to be a serious abnormality, the equipment correction strategy is executed to complete the cleaning operation of the feeding channel, remove the residual masterbatch and dust adhering to the pipe wall, and restart the feeding process after correcting the equipment status.

[0038] This implementation method can achieve accurate weight measurement and error compensation. By introducing data comparison and trend analysis into the feeding process, potential problems in equipment operation can be detected in a timely manner. This ensures that the weight accuracy of each feeding meets production requirements, and also prevents masterbatch residue from adhering to the inner wall of the feeding channel 4 through automatic cleaning and correction, thus avoiding a continuous increase in measurement error. This effectively improves the stability and accuracy of feeding polyolefin anti-UV aging masterbatch.

[0039] Second implementation method: Please see Figure 8 The difference between this embodiment and the first embodiment is that: After performing data analysis, the data analysis module also performs graded early warning. The specific operations include: comprehensive threshold comparison analysis, trend analysis, and correlation analysis to determine the early warning level of the feeding status. The early warning level is divided into three levels: mild early warning, moderate early warning, and severe early warning. A compensation strategy is executed for mild early warning; an equipment correction strategy is executed for moderate early warning; and an immediate shutdown and alarm is triggered for severe early warning. The specific steps for determining the warning level are as follows: A single anomaly exists: If only the difference between the actual weight and the target weight slightly exceeds the normal range, but is within the preset threshold, and the historical deviation is within a reasonable range with no obvious trend change, it is judged as a mild warning. If the current difference exceeds the preset threshold, but does not reach the level of serious exceedance, and the historical deviation has not continued to deviate, it is judged as a moderate warning; If the current difference significantly exceeds the threshold, or if both the current difference and the historical deviation exceed the limit at the same time, and the trend continues to worsen, it will be directly judged as a severe warning, and the system will be shut down and an alarm will be triggered. Multiple anomalies superimposed: If the current difference falls within the warning range and the historical deviation exceeds the threshold at the same time, but the trend does not deteriorate significantly, it is judged as a moderate warning; if both types of data exceed the standard and the trend continues to be abnormal, it is directly judged as a severe warning.

[0040] For mild warnings, the control module can select to execute a compensation strategy; for moderate warnings, the control module can execute an equipment correction strategy; for severe warnings, the system will immediately shut down and issue an alarm.

[0041] After the correction strategy in the first implementation is completed, the system automatically resumes feeding. If feeding again triggers a moderate or higher warning, the system will immediately stop and activate an alarm to prompt the operator to check and maintain the equipment.

[0042] This implementation method can accurately classify feeding anomalies, allowing the system to match corresponding handling solutions according to the severity of the anomaly. This avoids blindly shutting down the machine for minor anomalies, which would affect production efficiency, and also prevents production quality problems caused by untimely handling of severe anomalies, thereby further improving the stability of accurate metering and feeding and the continuity of production.

[0043] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A precise metering and feeding system for polyolefin UV-resistant aging masterbatch, comprising: The system comprises a data acquisition module, a metering module, a data analysis module, and a control module. The equipment comprises a storage tank (1), the output of which is connected to a conveying unit (2). The output of the conveying unit (2) is connected to a bidirectional conveying screw (3). The output of the bidirectional conveying screw (3) is connected to a feeding channel (4). The output of the feeding channel (4) is connected to a weighing unit (5). The output of the weighing unit (5) is connected to a mixing device. The feeding channel (4) comprises a main pipe (41), which has multiple discharge holes communicating with the discharge pipe (42). The outer end of the main body (41) is equipped with a dust discharge pipe (42) for discharging dust. A cleaning ring (43) for cleaning the inner wall is movably arranged inside the main body (41). Multiple blowing nozzles (44) are arranged at the top of the feeding channel (4). A sealing plate (7) that is displaced by an electric push rod is arranged at the top of the inner wall of the main body (41). The blowing nozzles (44) are embedded in the top of the main body (41). When the sealing plate (7) is in the initial position, the sealing plate (7) blocks the output end of multiple blowing nozzles (44), and the dust discharge hole is exposed. After the sealing plate (7) is displaced by a set distance, the sealing plate (7) blocks multiple dust discharge holes, and multiple blowing nozzles (44) are exposed. The weighing unit (5) is equipped with a weighing sensor; a compensation unit (6) is connected between the input end of the weighing unit (5) and the bidirectional feeding screw (3), the compensation unit (6) includes a storage box (61), and a quantitative feeding valve (62) is connected between the storage box (61) and the weighing unit (5). The metering module is used to compare the weight of the material measured at the weighing unit (5) with the target weight or historical data each time it is fed; the data analysis module is used to analyze the comparison data calculated by the metering module and make a judgment on the equipment status; the control module is used to execute a preset strategy according to the analysis results of the analysis module, the preset strategy includes a compensation strategy for the weighing unit (5) and an equipment correction strategy. When the control module executes the equipment correction strategy: first, it controls the cleaning ring (43) to move along the inner wall of the main pipe (41) to scrape and clean the masterbatch residue adhering to the pipe wall; then, it opens the blow nozzle (44) to spray compressed air into the main pipe to blow the cleaned pipe wall. After the blowing is completed, it draws air into the main pipe through the powder discharge pipe to remove the suspended dust and residual particles. After the entire correction process is completed, the system automatically resumes the feeding operation.

2. The precise metering and feeding system for polyolefin anti-UV aging masterbatch according to claim 1, characterized in that, The feeding channel (4) is inclined. The input end of the main body (41) is connected to a feeding protrusion ring (411). When the cleaning ring (43) is in the initial position, it is sleeved on the outside of the feeding protrusion ring (411). The main body (41) is rotatably connected to a lead screw (412) driven by a servo motor. The cleaning ring (43) is threadedly connected to the lead screw (412). When the cleaning ring (43) moves along the inner wall of the main body (41), it does not contact the spray nozzle (44).

3. The precise metering and feeding system for polyolefin anti-UV aging masterbatch according to claim 1, characterized in that: A dust sensor is installed inside the dust discharge pipe (42), and the output end of the dust discharge pipe (42) is connected to the induced draft fan.

4. The precise metering and feeding system for polyolefin anti-UV aging masterbatch according to claim 1, characterized in that: The input end of the weighing unit (5) is provided with a buffer guide plate, and an impact sensor is provided on the buffer guide plate.

5. The precise metering and feeding system for polyolefin anti-UV aging masterbatch according to claim 1, characterized in that: The specific operations of the metering module for data comparison include: first, comparing the material weight measured at the weighing unit (5) with the required target weight to calculate the difference between the two and obtain the current difference; then, retrieving the historical average weight measured in the weighing unit (5) during the feeding process with the same target weight, calculating the difference between the actual material weight measured at the weighing unit (5) and the historical average weight to obtain the historical deviation.

6. The precise metering and feeding system for polyolefin anti-UV aging masterbatch according to claim 5, characterized in that: The specific operations performed by the data analysis module include: comparing the current difference with a set threshold, comparing the current difference with the current difference obtained in the previous feeding process, and comparing historical differences with a preset threshold.

7. The precise metering and feeding system for polyolefin anti-UV aging masterbatch according to claim 1, characterized in that: After performing data analysis, the data analysis module also performs graded early warning. The specific operations include: comprehensive threshold comparison analysis, trend analysis, and correlation analysis to determine the early warning level of the feeding status. The early warning level is divided into three levels: mild early warning, moderate early warning, and severe early warning. A compensation strategy is executed when there is a mild early warning; an equipment correction strategy is executed when there is a moderate early warning; and an immediate shutdown and alarm is triggered when there is a severe early warning.

8. The precise metering and feeding system for polyolefin anti-UV aging masterbatch according to claim 1, characterized in that: When the control module executes the compensation strategy: First, based on the current difference calculated by the metering module, it precisely controls the quantitative feeding valve (62) of the compensation unit to supplement the weighing unit (5) with the corresponding weight of material to ensure that the total feeding amount meets the target requirements; after the compensation is completed, the system immediately detects the remaining amount of material in the storage box (61). If the remaining amount is lower than the preset standard value, it automatically triggers the bidirectional conveying screw (3) to supplement the compensation unit (6) with material until the storage box (61) reaches the standard storage amount.

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