A multi-stage cooperative crushing and screening resource treatment method for construction waste

Abstract

This invention relates to the field of construction waste crushing and screening control technology, and discloses a multi-stage collaborative crushing and screening resource utilization method for construction waste. This method addresses the problem of traditional methods lacking online adaptive adjustment of constraints for entanglement risk, abnormal load, and fine material generation. Before operation, the method first collects data on pre-screening, feeding, crushing, and screening operations to create a steady-state baseline and register the version. It then solidifies the thresholds and time windows for entanglement risk, abnormal load, and fine material generation rate. During operation, feeding, speed, gap, and return material boundaries are constrained according to the proportion of soft, lightweight materials and trend warnings. Peak reduction is applied during warnings. For significant risks, pulse feeding, rapid gap opening and closing, and optional disturbances are used. For critical or impact overloads, sequential unblocking and verification recovery are performed. When fine material or screening load is overloaded, hard constraints are activated, and the process switches to screen cleaning, limited return material, and tiered recovery. This controls blockage and over-crushing, and stabilizes production capacity and particle size.

Description

Technical Field

[0001] This invention relates to the field of construction waste crushing and screening control technology, specifically a method for the resource-based treatment of construction waste through multi-stage collaborative crushing and screening. Background Technology

[0002] Construction waste recycling typically employs a multi-stage crushing and screening production line process. This involves feeding, coarse crushing, screening, iron removal, and air separation to separate and recycle recycled aggregates from impurities. For example, patent application CN112246389B discloses a system and operating method suitable for the soft and hard separation of construction waste. The system divides the material into soft and hard separation paths. The hard separation path sequentially includes primary crushing, magnetic separation, screening, air separation, eddy current separation, secondary crushing, and tertiary screening to improve separation and recycling efficiency. Another example is patent application CN112742578B, which discloses a construction waste brick-concrete separation and sorting system. This system uses modules such as uniform feeding and soil removal, brick-concrete separation and stripping, screening and intelligent sorting, and concrete crushing to achieve the separation of brick-concrete components and subsequent reuse. However, existing construction waste recycling production lines often experience significant fluctuations in the composition of incoming materials during multi-stage crushing processes. Soft, lightweight materials such as films, fibers, woven bags, foam, and wood chips are mixed with hard materials like concrete, bricks, and mortar aggregates before entering the crushing chamber, and the soft-to-hard ratio remains constant regardless of the number of batches. Furthermore, existing multi-stage crushing sections use fixed machine models, speeds, crushing gaps, and feeding rhythms, lacking online constraints and adaptive adjustment mechanisms to address issues like entanglement in the crushing chamber, abnormal main unit load, and fine material generation levels. Consequently, the high proportion of soft, lightweight materials easily entangles on the rotor or hammers, causing uneven feeding, crushing chamber blockage, and main unit overload, leading to frequent shutdowns or forced load reduction. On the one hand, simply increasing the crushing intensity or reducing the gap to solve the blockage problem can easily lead to over-crushing of hard materials, abnormally increasing the size of the fine material segment and carrying impurities. This results in increased screening load, intensified material recycling, and difficulty in stabilizing and cleaning the particle size distribution of recycled aggregate. It also causes increased energy consumption, rapid wear of vulnerable parts, and difficulty in tracing and reproducing the cause of the failure. In summary, the existing crushing section lacks online constraint and adaptive adjustment mechanisms for mixed and fluctuating incoming materials, causing entanglement and over-crushing to occur simultaneously. Therefore, a multi-stage collaborative crushing and screening method that can detect entanglement risks and abnormal loads during operation and suppress excessive fine material generation is needed to achieve technical effects such as stable production capacity, controllable particle size distribution, and low energy consumption and wear. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a multi-stage collaborative crushing and screening method for the resource utilization of construction waste, which solves the problem of traditional methods lacking online adaptive adjustment of constraints on entanglement risk, abnormal load, and fine material generation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A method for the multi-stage co-processing crushing, screening, and resource recovery of construction waste includes: S1: Collect the pre-screening, feeding, crushing and screening operation data, establish a steady-state baseline, and set the judgment thresholds and time windows for entanglement risk, abnormal load, and fine material generation rate; S2: Based on the proportion of soft and light materials in the incoming material, the material is divided into low soft, medium soft, and high soft grades, and the upper limit of feeding, the upper limit of rotation speed, the lower limit of gap, and the upper limit of return material are limited respectively, and the grade holding time is set. S3: During operation, the risk of entanglement and the load status are determined in real time. When an early warning is issued, the feed rate and speed are reduced or the gap is increased. When a significant risk is detected, the feed rate is switched to pulse feeding and the gap is quickly opened or closed or short-term disturbance is executed. S4: When a critical risk or impact overload is determined, the following steps are executed in sequence: stop feeding and empty, low cycle time recovery, low speed and large gap maintenance, and then proceed to recovery confirmation. S5: When the fine material generation or screening load exceeds the limit, it is forbidden to increase the speed or reduce the gap. Instead, switch to screen cleaning, limited return material and staged recovery.

[0005] Furthermore, the operating volumes of pre-screening, feeding, crushing, and screening are collected to establish a steady-state baseline, including: Before establishing the baseline, set the effective aperture for the pre-screening, feeding, crushing and screening measuring points, and freeze the screen hole configuration, feeding settings, speed settings and gap settings. Once the gating conditions are met, the steady-state window is opened to solidify the baseline package. The baseline package records the sampling method, sampling duration, window start and end times, and parameter version identifier.

[0006] Furthermore, thresholds and time windows are set for judging entanglement risk, abnormal load, and fine material generation rate, including: When setting the threshold, the baseline packet is used as a reference for the relative threshold, and the device's rated parameters are used as a reference for the absolute threshold. The entanglement risk, load anomaly, and fine material generation rate are set as graded trigger conditions, and corresponding time windows are configured for each level of trigger condition. At the same time, consistency confirmation conditions are set. The threshold is calibrated based on the trigger frequency and the threshold version number is registered. The threshold version number is then associated with the baseline package number and recorded.

[0007] Furthermore, based on the proportion of soft and lightweight materials in the incoming materials, they are divided into low-soft, medium-soft, and high-soft grades, including: The gear selection uses the statistical caliber of the proportion of light objects and introduces the frequency of trend warning events as a gate control criterion; When the weighing data for light items is missing, the proportion of light items can be calculated by converting the difference between adjacent weighing points, or by using alternative statistical methods. During periods of restricted operation, the count of trend warning events will not be included in the downgrade determination. The statistical period is registered in alignment with the baseline package number.

[0008] Furthermore, the upper limit of feed rate, upper limit of rotation speed, lower limit of gap, and upper limit of return material are respectively limited, and the gear holding time is set, including: Parameter boundaries are pre-generated for each gear and gear holding constraints are set, while the boundary switching sequence and single adjustment limit are fixed. The shifting between gear levels is performed using a segmented buffering method; After gear switching, the verification quantity based on the return material ratio is reviewed. If the review fails, a rollback adjustment is performed.

[0009] Furthermore, the system determines the risk of entanglement and load status in real time during operation, including: Operation monitoring is conducted within the gear range boundaries, and the host current, feed flow rate, discharge material level or differential pressure, screening current, fine material flow rate and return ratio are collected according to a uniform fluctuation caliber. Perform validity checks on the collected data, and perform boundary correction when data exceeds the limits; When the critical quantity is invalid, switch to conservative operation and record the sampling caliber and version identifier.

[0010] Furthermore, when a warning is triggered, the feed rate and rotation speed are reduced or the gap is increased. When a significant risk is detected, the system switches to pulse feeding and performs rapid gap opening and closing or short-term disturbances, including: The early warning and response measures include peak shaving and gap amplification based on the gap margin branches, while setting verification exit conditions and tiered recovery rules. Significant risk management involves pulse feeding, with verification of the pulse opening and closing segments, rapid opening and closing of the linkage gap, and optional short-term disturbances. In the handling of significant risks, rules for prohibiting adjustment, exception gating, and observation cancellation are set, and status transitions are performed according to review conditions and triggering conditions.

[0011] Furthermore, when a critical risk or impact overload is determined, the following steps are executed sequentially: stop feeding and emptying, low-cycle recovery, low-speed large-clearance maintenance, and then proceed to recovery confirmation, including: Emergency response is initiated when the risk trigger and the consistency verification gate for material output are established. The material stop operation is confirmed based on the flow rate receipt. Low-cycle recovery employs pulse feeding, and the pulse opening and closing segments are verified. Under the constraints of large clearance and low speed, the termination condition is determined. Once the condition is met, the operating parameters are restored according to the step-by-step verification rule, and the rollback rule, trigger jump rule, locking constraint and restricted identifier recording rule are set.

[0012] Furthermore, when the fine material generation or screening load exceeds the limit, it is prohibited to increase the rotation speed or reduce the gap, including: When the fine material generation rate exceeds the limit or the screening load is abnormal, the system enters the fine material hard constraint state and activates the prohibition rule, prohibiting the increase of rotation speed and the reduction of gap. The trigger threshold for fine material hard constraints is referenced to the baseline packet record value, and a relative deviation judgment caliber is adopted. The trigger channel, threshold version number, trigger frequency and receipt result are recorded. Under the condition of hard constraint of fine materials, the handling rules of cleaning the net and reducing load, limiting return material and controlling over-diameter are implemented.

[0013] Furthermore, the process will transition to network cleanup, limited material returns, and phased recovery, including: When the system is under hard constraint of fine materials, the network is cleared and the load is reduced, and the receipt is verified. If the receipt review fails, implement return material restrictions and return path redirection; Set the path adjustment and observation cancellation rules for overshoot control, and enter the step-by-step recovery after the fallback criterion is met; The phased recovery restores the screen cleaning intensity, return material limit, and feed speed in sequence, and sets jump rules and status recording rules.

[0014] Compared with existing technologies, this invention provides a multi-stage synergistic crushing, screening, and resource recovery method for construction waste, which has the following beneficial effects: 1. This invention, by adopting a baseline package and threshold version to unify the operating standards, incorporates key operating parameters of pre-screening, feeding, crushing, and screening into the gated acquisition and verification process. It solidifies the classification and uniformity of entanglement risk, abnormal load, and fine material generation rate, and classifies levels based on the proportion of soft, lightweight materials and trend events. It also links and constrains feeding, rotation speed, gap, and return material boundaries, allowing crushing and screening parameters to be converted according to rules under varying soft-hardness ratios. During operation, it reduces the risks of blockage and overload caused by soft, lightweight material entanglement and adhesion through peak shaving, pulse feeding under significant risks, rapid gap opening and closing, and optional disturbances. When the load reaches the critical point or is impacted by overload, the system handles the situation according to a fixed sequence of material stop receipts, low-cycle recovery, and low-speed, large-gap recovery, and performs step-by-step verification and recovery. This reduces repeated start-ups and shutdowns and forced production increases based on experience. When the load of fine material or screening exceeds the limit, the system uses hard constraints to intercept and adjust the speed and reduce the gap. This is converted into a screen clearing receipt, limited material return, path redirection, and step-by-step recovery. Combined with version and status records, the system supports root cause verification. Ultimately, this achieves stable production capacity and particle size distribution, controlled fine material and impurities, reduced energy consumption and wear, and reduced downtime risk. This solves the problem of traditional methods that lack online constraint adaptive adjustment for entanglement risk, abnormal load, and fine material generation.

[0015] 2. This invention transforms the adjustment of multi-stage crushing and screening from experience-based adjustments to closed-loop control with version registration, state transition, and feedback verification. Before operation, a judgment criterion is established using baseline packages and threshold versions. During operation, direction is limited by gear boundaries, prohibition rules, and exception gating. In case of anomalies, consistency confirmation, observation cancellation, and rollback are used to control the spread of erroneous actions, recording trigger channels, handling sequences, feedback hits, and parameter switching in the event log. Synchronous handling is maintained when disturbances such as entanglement, overload, and excessive fine material limits are superimposed, avoiding repeated adjustments and unplanned shutdowns due to strategy discrepancies. Ultimately, the process is locatable, traceable, and verifiable, improving the controllability and maintainability of the production line. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a multi-stage collaborative crushing, screening, and resource recovery method for construction waste according to the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: Figure 1 A method for the multi-stage synergistic crushing and screening of construction waste for resource recovery is presented, including: S1: Collect data on pre-screening, feeding, crushing, and screening operations; establish a steady-state baseline; and set thresholds and time windows for judging entanglement risk, abnormal load, and fine material generation rate. The specific implementation is as follows: Before continuous feeding begins, operational data collection and steady-state baseline establishment are completed. The judgment thresholds and time windows for entanglement risk, abnormal load, and fine material generation rate are solidified into parameters that can be directly referenced for incoming material grading and parameter boundary switching. Rated capacity, rated current, recommended speed upper and lower limits, and mechanical clearance range are parameters listed on the equipment nameplate and in the instruction manual. The parameter version is registered before starting, and the parameter version must include at least the version number, equipment model, rated parameter value, screen configuration, feeding setting, speed setting, and clearance setting. The fluctuation amplitude is uniformly measured using a 10-second short window standard deviation, and a unified noise measurement method and verification are implemented. When the machine is started, it enters the data acquisition preparation state. The production line operates at a low load adjustable range within the initial set range to reduce load fluctuations before the baseline is established. The data acquisition preparation state is entered under the following conditions: normal data acquisition link communication, consistent data acquisition time reference, and continuous effective time of key measurement points for more than 120 seconds. Key measurement points include at least the following fields: screen motor current, oversize mass flow rate, undersize mass flow rate, and screen cleaning action count for pre-screening; feeder speed or frequency, feed motor current, belt scale mass flow rate, and material level signal for feeding; host current or power, speed, crushing gap position, inlet and outlet pressure difference or discharge chute material level signal for crushing; and screen current, oversize return mass flow rate, undersize mass flow rate of each particle size, and screen cleaning status for screening. To ensure data verifiability, the validity criteria for measurement points are defined as follows: The effective range for current and power signals is 0% to 110% of the rated range; values ​​exceeding this range are considered invalid. This is used to cover short-term fluctuations exceeding the rated range and to exclude saturation or abnormal readings. The effective range for the mass flow rate of the belt scale is 5% to 110% of the rated conveying capacity; values ​​below 5% are considered intermittent feeding. This is used to avoid excessive metering errors in low flow rates. The effective range for the crusher gap position is 5% to 95% of the mechanically permissible range; values ​​at the boundary are considered under adjustment. This is used to avoid positioning errors and operational vibrations near mechanical limits. Material level signal... A consistency criterion is adopted: a change from low to high or from high to low must occur at least once within 120 seconds to be considered valid. If there is no change within 120 seconds, the belt scale mass flow rate is stable at more than 80% of the set value and the material level and pressure difference in the discharge chute are in a non-abnormal state as alternative valid conditions. The stability judgment is that the mean deviation of the 10-second short window does not exceed ±5% of the set value and the standard deviation of the short window does not exceed 3% of the set value. 80% is used to confirm the existence of continuous feeding, and ±5% and 3% are used to cover the common short window fluctuations and measurement noise levels of belt scales, thereby reducing the false judgment of material level jamming. In the data acquisition preparation state, fix the sieve size and key operating settings to ensure baseline comparability and reuse subsequent thresholds at a consistent caliber. Fixed settings should include at least the following fields: pre-screening sieve size, secondary sieve size, feed setting, crushing speed, crushing gap, and screen cleaning frequency. The pre-screening sieve size can be selected as 50 mm, with values ​​ranging from 30 mm to 80 mm. This is used to prioritize the release of fine soil and loose materials to reduce the instantaneous crushing load and mitigate the risk of adhesion and clogging. The secondary sieve size can be selected as 16 mm, with values ​​ranging from 5 mm to 25 mm. This is used to match commonly used recycled aggregate specifications and form a stable fine material statistical boundary. The initial feed setting can be selected as 80% of the rated capacity, with values ​​ranging from 60% to 95%. This is used to balance continuous operation. Operational stability while preserving peak reduction and recovery margin; crushing speed can be selected as 75% of the recommended upper limit; the value ranges from the recommended lower limit to 90% of the recommended upper limit; used to balance throughput and reduce entanglement sensitivity after soft, light materials are drawn in; the upper limit is set to 90% of the recommended upper limit to avoid entering the high energy density range during the baseline stage, which would cause fine materials and entanglement characteristics to contaminate the baseline; crushing gap is set in millimeter diameter; selectable as 60 mm; the value ranges from 40 mm to 80 mm; used to balance oversized crushing and fine material control and align with the boundary of the secondary screen openings; screen cleaning frequency can be selected as 10 times per minute; the value ranges from 6 to 15 times; used to reduce screen clogging interference without excessively introducing screening current fluctuations; The mass flow rate of recycled material and the mass flow rate of each particle size should be preferentially passed through the belt scale of the corresponding conveyor belt. If a belt scale is not available, fixed-period weighing sampling can be considered, and the mass flow rate can be converted from the conveyor belt running time. The sampling method, sampling duration, sampling start and end time, conveyor belt identification, and other fields should be recorded in the baseline package to repeatedly calculate the recycled material ratio and particle size flow rate. During the baseline establishment period, the screen size setting, feeding setting, speed setting, gap setting, and screen cleaning frequency should remain unchanged to avoid the response process caused by parameter changes affecting the representativeness of the baseline. After initial setup, the system enters steady-state observation mode to eliminate obviously unstable operating conditions and prevent baseline interference from impact overload, intermittent feeding, or screen clogging. The steady-state observation duration can be selected from 2 to 6 minutes, e.g., 3 minutes, to cover multiple feeding fluctuation cycles and avoid significant batch switching. During steady-state observation, the steady-state window should be opened when at least the monitored parameters, including crusher current, feed mass flow rate, screening machine current, and over-screen return ratio, meet the gating conditions. The gating conditions include the crusher current average being below 70% of the rated current, and the 10-second short-window current standard deviation not exceeding 3% to 8% of the rated current, e.g., 5%, to avoid amplified fluctuations in high-load sensitive areas. Feeding... The mass flow rate should not be less than 85% of the feed setting to prevent intermittent feeding from lowering the current baseline; the screening machine current should not exceed 75% of the rated current and the fluctuation range should not exceed 10% of the rated current to avoid screen surface saturation leading to blockage interference; the proportion of oversize material should not exceed 45% of the total feed to avoid excessive oversize material causing particle size distribution distortion; if the gate control is not met, maintain the initial setting and continue observation, with the cumulative observation time not exceeding 12 minutes. After exceeding this time, manual verification should be initiated, prioritizing the inspection of screen blockage, feed stability, and belt scale drift, before returning to the data collection preparation state; the 12-minute period should generally not cross the main unloading section of a batch of incoming material to reduce baseline shift caused by cross-batch mixing; After successful gating, a steady-state window is opened. The window length is 8 minutes, selectable from 3 to 15 minutes, to cover multiple feeding fluctuation cycles and avoid excessively long windows spanning incoming batches. Within the steady-state window, feeding, rotation speed, gap, and screen aperture are not adjusted; screen cleaning operates at the normal frequency. Baseline quantities are collected and solidified within the window to form a baseline package. The baseline package includes at least the average current and fluctuation amplitude of the crusher, the average feed mass flow rate, the proportion of material returned from the screen, the average mass flow rate of the fine material conveying path, the average screening current and fluctuation amplitude, the proportion of material under-screened material in the pre-screening process, the frequency of screen cleaning actions, the start and end times of the window, and the screen aperture configuration. Fields such as feed setting, speed setting, gap setting, return path status indicator, and screen cleaning frequency are used for threshold version and working condition caliber verification; the over-screen return ratio is the ratio of over-screen return mass flow rate to total feed mass flow rate, and the pre-screening under-screen ratio is the ratio of pre-screening under-screen mass flow rate to total feed mass flow rate; the fine material statistical caliber is the material entering the fine material conveying path from the secondary screen, and the fine material boundary is determined according to the secondary screen aperture; when there is a bypass mixing into the fine material path, the baseline update is paused during the bypass operation and the bypass status is marked in the baseline package to avoid the bypass changing the statistical caliber and reducing baseline comparability; The threshold is determined jointly by the equipment's rated parameters and the baseline of this operation. The relative threshold is referenced to the baseline, and the absolute threshold is referenced to the rated current. After the first commissioning or a change of crusher model, the threshold trigger frequency is statistically analyzed based on a baseline package of no less than three steady-state windows, and the threshold sensitivity is calibrated. If the trigger frequency is higher than three times per hour, the trend warning increment is reduced by 2 to 5 percentage points. If the trigger frequency is lower than once per shift, it is increased by 2 to 5 percentage points, and the updated threshold version is recorded. Among them, three times and one time are used to characterize the abnormal trigger frequency of thresholds that are too tight or too loose. The 2 to 5 percentage point range is used as a small step adjustment range to avoid excessive adjustment at once. The baseline package record should include at least the window start and end time, equipment rated parameter version, baseline index, threshold version, and number of triggers. After establishing the baseline package, the threshold and time window for determining the winding risk are solidified, and the triggering conditions are used as verifiable inputs for the determination. Winding risk is divided into three levels: trend warning, significant risk, and critical risk. The time window for trend warning is 30 seconds, but can be selected from 10 to 60 seconds. The triggering condition is a 10% increase in the main unit current relative to the baseline and a 5% decrease in the feed mass flow rate relative to the baseline, lasting for at least 10 seconds. This setting considers the common occurrence of load increase and throughput decrease during the initial stage of material loading. The time window for significant risk is 10 seconds. The triggering condition is that the main unit current reaches 85% of the rated current for 10 seconds and the feed flow rate decreases. Considering that the load may enter a highly sensitive area after the entanglement expands; the critical risk time window is set to 5 seconds, and the trigger condition is that the host current reaches 100% of the rated current and lasts for 5 seconds. The parameter range can be selected from 95% to 110% of the rated current and lasts from 2 seconds to 8 seconds. The setting is considered to be an intervention window before the motor overload protection or equipment interlock action; in order to reduce false triggering, a consistency confirmation condition is added to the critical risk. The consistency confirmation includes at least one of the following fields: the material level in the discharge chute is high for 3 consecutive seconds, and the pressure difference between the inlet and outlet rises for 10 consecutive seconds. This is used to distinguish between the current spike caused by short-term impact of hard large pieces and the blockage trend caused by poor material discharge; Load anomalies can be categorized into impact type and sustained type. The trigger condition for impact type overload is a jump of more than 30% in the host current relative to the baseline within 1 second, with a range of 20% to 40%, used to characterize peak loads caused by the entry of hard, large materials or momentary blockages. When impact type overloads occur 3 times within 5 minutes, they can be included in the risk frequency statistics of incoming material grading to reflect that the anomaly is sustained rather than sporadic. The trigger condition for sustained type overload is a host current maintained above 75% of the rated current within 60 seconds and a 10-second short-window current standard deviation reaching twice the baseline, with a range of 45 to 120 seconds, 70% to 85%, and 1.5 to 3 times, used to characterize prolonged high frictional resistance and fluctuation amplification caused by material accumulation or hanging. Relevant records should include at least the trigger time, host current peak and average values, short-window standard deviation, duration, feed mass flow rate, and discharge material level or pressure difference, to facilitate verification and cause investigation. The fine material generation rate is determined using a process proxy threshold. The trigger condition for fine material exceeding the limit is a 20% increase in the fine material conveyor belt mass flow rate relative to the baseline for 180 seconds. The parameter range can be selected as an increase of 10% to 35% and a duration of 60 seconds to 300 seconds. This value is used to match the more stable change characteristics of fine material flow rate on the minute scale caused by over-grinding and entrainment. To distinguish between over-grinding and falsely high fine material levels caused by screen blockage, a consistency confirmation condition is set. Consistency confirmation includes at least one of the following: a 15% increase in screening current relative to the baseline or a 10 percentage point increase in the proportion of material returned to the screen relative to the baseline for 120 seconds. The consistency confirmation uses a shorter time window to reflect the increase in screen load in advance, while the main criterion for fine material uses a longer time window to ensure the continuity of the change. When the fine material flow rate increases but the consistency confirmation is not established, the screen is checked and the screen cleaning action is recorded. The hard constraint for fine material is not entered to reduce misjudgment caused by belt scale drift or short-term disturbance. After the threshold is fixed, set the number and threshold version of the baseline package, register the screen configuration version and initial operating parameters. The initial operating parameters should include at least the fields of feed setting, speed setting and gap setting. Clear the trend warning, significant risk and impact overload event counters, and use the baseline package number as the statistical cycle starting point for the proportion of light items as the gear reference.

[0019] S2: Based on the proportion of soft and lightweight materials in the incoming material, the material is divided into low-soft, medium-soft, and high-soft grades. The upper limit for feeding, the upper limit for rotational speed, the lower limit for gap, and the upper limit for return material are each set. A grade holding time is also set. The specific implementation is as follows: After locking the baseline package number and threshold version, the rules for classifying the proportion of soft and lightweight materials in the output are given, and the boundaries of the class parameters are generated. The boundaries of the class parameters include at least the upper limit of feeding, the upper limit of rotation speed, the lower limit of gap, the upper limit of return material, and the class holding time. The boundary switching and anti-shaking control of the soft and hard ratio fluctuations are also provided. The classification judgment adopts dual input gating of the proportion of lightweight materials and the frequency of trend warning events. The statistics and event records have timestamps and statistical period numbers, and are registered in alignment with the baseline package number for easy use in subsequent risk suppression processes. The classification threshold and time window are used to smooth vehicle batch fluctuations, identify persistent risks, and constrain subsequent adjustments to prevent them from going over the limits. The proportion of light materials is determined by on-site, continuously obtainable weighing or mass flow statistics. The proportion of light materials is defined as the ratio of the collected light material mass to the total feed mass within the statistical period. The total feed mass is accumulated by the total feed belt scale, while the collected light material mass can be obtained by weighing at the light material collection bin, metering by the baler, or accumulating using the light material conveyor belt scale. The statistical period is 5 to 20 minutes, for example, 10 minutes, to match vehicle unloading batches and smooth out peaks in the proportion caused by instantaneous cluster entry. Each statistical period record includes at least the period start and end times, total cumulative feed mass, cumulative light material mass, and light material collection... Fields such as the operation status of the collection section; when the light object collection quality is missing within a cycle, the difference between adjacent weighing points is used for conversion, and the conversion method and sampling duration are recorded; when the light object collection section is out of service or the weighing link is missing, resulting in the inability to form a difference, the proportion of that cycle is judged as unusable and switched to an alternative method; the alternative method can be the light object packaging weight statistics, with a statistical period of 20 minutes to 60 minutes to cover one packaging cycle, and the packaging weight is allocated to the corresponding cycle according to time; when the packaging weight cannot be obtained, the light object flow rate level formed by the light object conveyor belt current and speed can be selected as an auxiliary reference, and no separate upgrade or downgrade is triggered; The frequency of trend warning events is used as the second criterion. The event frequency is the number of times a trend warning is triggered within the statistical window, and the triggering criteria are consistent with the threshold version. The event frequency statistical window ranges from 15 minutes to 60 minutes, with a default of 30 minutes. The 30-minute window is used to cover at least three 10-minute light material proportion statistical cycles to distinguish between occasional warnings and persistent risks. The event frequency is recorded using an event counter, and the recorded content includes at least the trigger time and the corresponding light material proportion statistical cycle number. The downgrade statistics do not include the number of warnings during the restricted state. The restricted state is set by emergency unblocking or fine material hard constraints and is cleared after exit recovery confirmation and continuous stable operation for 10 minutes. The 10-minute window is used to cover multiple light material proportion statistical updates and equipment response lags to avoid misjudging the decline in incoming material risk due to a decrease in the number of warnings when parameters have been tightened. The grading rules are divided into low-soft, medium-soft, and high-soft grades. These grades represent low-soft, medium-soft, and high-soft material conditions, respectively. The grade determination is based on the proportion of light materials and the frequency of trend warnings. The entry condition for the low-soft grade is that the proportion of light materials is lower than the low-soft threshold and there are no more than one trend warning within the event statistics window. The low-soft threshold is 5% to 10%, for example, 8%, and is used to cover the common low-soft material conditions where soft materials are difficult to form a continuous hanging chain. The entry condition for the medium-soft grade is that the proportion of light materials is between the low-soft and medium-soft thresholds or there are two trend warnings within the event statistics window. The medium-soft threshold is 12% to 18%, for example, 15%, and is used to correspond to typical conditions where the proportion of light materials increases and warnings increase. The entry condition for the high-soft grade is that the proportion of light materials is higher than the medium-soft threshold or there are more than three trend warnings within the event statistics window, and is used to correspond to conditions where the risk of entanglement increases significantly under high-soft material conditions. Upgrading employs continuous gating. When the proportion of light materials triggers an upgrade, the judgment condition must be met continuously for 2 to 5 minutes, such as 3 minutes. The 3-minute period is used to filter out single cluster impacts and span a feeding fluctuation cycle. When the frequency of trend warnings triggers a medium-soft upgrade, at least two trend warnings must have been triggered within the last 15 minutes, and the proportion of light materials must be no less than 75% to 90% of the low-soft threshold, such as 6%. This lower limit is used to ensure that the warning and the existence of light materials are met simultaneously, avoiding false triggering of upgrades due to the frequency of warnings caused by pure hard impacts. The gear determination record must include at least the light material proportion value, event statistics window length, number of trend warnings, and judgment time, for verification purposes. Downshifting employs a delayed switching mechanism and sets a gear holding time, ranging from 10 to 30 minutes, for example, 20 minutes. The 20-minute timeframe is used to cover fluctuations before and after unloading the same vehicle's material and to suppress back-and-forth gear switching. The downshifting condition is that the entry condition for the next lower gear is met continuously to reach the gear holding time. When downshifting from high soft to medium soft, the proportion of light materials is continuously lower than the medium soft threshold and the trend warning does not exceed once within this time. When downshifting from medium soft to low soft, the proportion of light materials is continuously lower than the low soft threshold and the trend warning does not exceed once within this time. When the tiered threshold is first put into operation, it is enabled by default value. After reviewing the number of tier increases and decreases by shift, it is fine-tuned and the version is registered. If the number of tier increases in a single shift exceeds 6, the tier increase duration threshold can be increased by 1 to 2 minutes, or the light item proportion threshold can be increased by 1 to 3 percentage points. If there are no tier increases for two consecutive shifts and the number of trend warnings increases, the light item proportion threshold can be decreased by 1 to 3 percentage points. The 6 times threshold is used to identify the risk of rhythm jitter caused by frequent tier increases within a single shift. The 1 to 2 minutes and 1 to 3 percentage points are used as small step adjustment intervals to gradually calibrate the sensitivity without changing the tiered structure and to avoid excessive adjustment at one time. After fine-tuning, the tiered threshold version number is recorded and associated with the baseline package number. The associated information includes at least the version number, activation time, threshold value, and adjustment reason, which facilitates the review of the threshold caliber used in the shift. Once the gear is determined, gear parameter boundaries are generated, serving as the allowable range for subsequent adjustments. Subsequent settings must not exceed these boundaries. Gear parameter boundaries must include at least the following fields: upper limit for feed, upper limit for rotational speed, lower limit for clearance, and upper limit for return material. The upper limit for feed is 85% to 100% of the rated capacity; for low-soft gears, it's 95%; for medium-soft gears, it's 70% to 90% (e.g., 85%); and for high-soft gears, it's 50% to 80% (e.g., 70%). This is to reserve space for peak shaving and recovery from low cycle times. The upper limit for rotational speed is 70% to 100% of the recommended upper limit; for low-soft gears, it's 95%; for medium-soft gears, it's 90%; and for high-soft gears, it's 80%. This is to limit the upper limit of crushing strength. The lower limit for clearance uses a millimeter diameter and is set to 5. The clearance ranges from 0 mm to 70 mm, with low soft setting (e.g., 50 mm), medium soft setting (e.g., 55 mm), and high soft setting (e.g., 60 mm) as the interval, and the difference between intervals can be selected from 3 mm to 10 mm. When the equipment's recommended minimum clearance is greater than the above values, the lower limit of the clearance is set to the equipment's recommended minimum clearance, while maintaining the interval difference range unchanged. This clearance range is selected under the constraint of the equipment's recommended minimum clearance and in conjunction with the secondary sieve aperture grading boundary to match common target particle size control. The upper limit of the return material is set to 15% to 50% of the total feed, with low soft setting (e.g., 45%), medium soft setting (e.g., 35%), and high soft setting (e.g., 25%), to limit the number of cyclic crushing cycles. The above boundaries are allowable boundaries, and the actual set values ​​within the boundaries are determined by the subsequent adjustment process. To facilitate gear shifting and reduce sudden impacts, a fixed adjustment sequence and single adjustment limit are established. The adjustment sequence can be selected as follows: first adjust the upper limit of feeding, then adjust the upper limit of rotational speed and the lower limit of clearance, and finally adjust the upper limit of return material. The single adjustment limit should include indicators such as feeding adjustment not exceeding 10%, rotational speed adjustment not exceeding 8%, clearance adjustment not exceeding 6 mm, and return material upper limit adjustment not exceeding 10 percentage points. The limit values ​​should be determined with reference to the equipment response speed, mechanical inertia, and conveying cycle time. When switching directly from low soft gear to high soft gear, it can be done in two stages: first switch to medium soft gear and complete one limit adjustment, then wait 30 to 120 seconds, for example, 60 seconds, to switch to high soft gear and complete the second limit adjustment. The 60 seconds are used to cover the inertial response of the feeding and screening chains and to observe the initial drop in current and return material, thereby providing a buffer time for subsequent tightening and reducing material interruption or return material accumulation. After gear switching, a confirmation state is entered, which lasts from 60 to 180 seconds (default is 120 seconds). This state verifies that the main unit current does not exceed 80% of the rated current and the fluctuation range does not exceed twice the baseline; the actual feed mass flow rate reaches at least 85% of the newly set value; and the proportion of material returned to the screen does not exceed the upper limit for that gear. The fluctuation range is determined using a 10-second short window standard deviation. The proportion of material returned to the screen is preferentially calculated from the return conveyor belt scale and the total feed belt scale. If a belt scale is not available, it can be obtained by fixed-duration weighing sampling conversion. The 120-second period is used for coverage. Multiple monitoring and update cycles are used to observe the stability of current drop. 80% of the time is used to avoid high-load sensitive areas, and 85% is used to eliminate false stability caused by intermittent feeding. After verification, the gear position and parameter boundaries are registered and output. The parameter boundaries include at least the upper limit of feeding, the upper limit of speed, the lower limit of gap, and the upper limit of return material. Event count information is recorded at the same time. If the verification fails, the current gear position is maintained, the feeding is reduced by 5% to 10% or the gap is increased by 2 mm to 5 mm and then verified again. The number of repetitions shall not exceed 2. If it exceeds 2, it is marked as restricted operation and switched to conservative operation.

[0020] S3: During operation, the risk of entanglement and the load status are determined in real time. When a warning is triggered, the feed rate and speed are reduced or the gap is increased. When a significant risk is detected, the feed rate is switched to pulse feeding and the gap is rapidly opened or closed or short-term disturbance is executed. The specific implementation is as follows: After the gear position identification and parameter boundaries are determined, real-time judgment and risk suppression are implemented. The judgment inputs are mainly based on entanglement risk and abnormal load, and the constraints are mainly based on fine material generation rate and screening load. Feeding, speed and gap are adjusted in conjunction within the gear position boundaries. When a significant risk is reached, pulse feeding, rapid opening and closing of the gap and short-term disturbance are superimposed to suppress blockage, overload and over-grinding caused by entanglement and hanging material. The judgment parameters include at least the threshold version, baseline package number and other fields. The fluctuation range is calculated according to the standard deviation of a 10-second short window. The relevant parameters are from the previous registration records. The conditions for entering the operation monitoring state are that the gear position identifier is valid, and the feeding setting, speed setting, gap setting, and return ratio are within the upper limit of feeding, upper limit of speed, lower limit of gap, and upper limit of return ratio for that gear position, respectively. When a boundary violation occurs, the system enters the boundary correction state, restoring the out-of-bounds item to the boundary value and maintaining it for 30 to 120 seconds (default is 60 seconds). The 60-second interval is used to cover the inertial response time of feeding and material flow, allowing the current and return material to return to a definite stable range before returning to the operation monitoring state. In the operation monitoring state, the system collects fields such as host current, feeding mass flow rate, discharge material level or differential pressure, gap position, screening current, fine material belt flow rate, and over-screen return ratio at an update cycle of 1 to 5 seconds (default is 2 seconds). The 2-second interval is used to capture current and flow trend changes at the second level and avoid overly dense sampling amplifying noise. The collected results are verified according to validity criteria, which include at least current and power. Conditions include: 0% to 110% of the rated capacity, 5% to 110% of the belt scale's mass flow rate of the rated conveying capacity, and 5% to 95% of the gap position within the mechanically permissible range; the ratio of oversize return material and the return material ratio are preferentially calculated by the return conveyor belt scale and the total feed belt scale. If a belt scale is not available, a fixed-duration weighing sampling conversion can be selected; if any key quantity is invalid for more than 10 consecutive seconds, it enters a conservative operation state. The 10 seconds are used to eliminate instantaneous communication jitter or single-point short-term glitch; in the conservative operation state, the feeding setting is reduced to 70% of the current setting. 70% is used to quickly reduce the filling rate without interrupting the material flow, and a light pulse feeding is enabled. The light pulse cycle is 6 to 10 seconds, with a default of 8 seconds. The opening and closing ratio is 2:1 to 3:1, with a default of 3:1, used to form a significant intermittent discharge gap within the response range of most feeding mechanisms, until the data collection is restored and the operation is exited. The system enters an early warning state when the operation monitoring determines that a trend warning or an early signal of a persistent load anomaly is met. Trend warnings use registered thresholds, such as a 10% increase in the host current relative to the baseline and a 5% decrease in the feed mass flow rate relative to the baseline within a 30-second window, lasting for at least 10 seconds. An early signal of a persistent load anomaly can be selected as a 60-second window where the host current is consistently higher than 75% of the rated current and the fluctuation amplitude exceeds twice the baseline. Upon entering the early warning state, peak shaving adjustments are performed, including at least reducing the feed rate and speed. The feed rate reduction ranges from 5% to 15%, and the speed reduction ranges from 3%. Up to 10%, used to reduce the crushing chamber filling rate and instantaneous impact intensity; the warning holding time is 30 seconds to 180 seconds, with a default of 90 seconds. The 90-second setting is used to cover the lag process of material release and current drop and to facilitate verification of whether the risk has been eliminated; during the warning period, it is forbidden to increase the feed rate and speed, and it is forbidden to reduce the gap; when the gap margin is met, it is possible to increase the gap once. The gap margin is 2 mm to 8 mm, and the increase is 2 mm to 8 mm and maintained until the warning ends. The 2 mm is used to ensure that the action can be distinguished, and the 8 mm is used to avoid significant drift in particle size control and to maintain consistency with the lower limit of the gear gap. Exiting the warning status is determined by verification conditions. Verification conditions include at least the main unit current recovering to within 5% of the baseline and remaining there for more than 30 seconds, and the feed mass flow rate recovering to more than 90% of the newly set value after peak reduction and remaining there for more than 30 seconds. After the verification is passed, the system enters the recovery confirmation phase, and the feed rate and rotation speed are increased in a step manner, with a single increase not exceeding 5% and a step interval of 60 seconds. If the verification fails and the main unit current continues to rise or approaches the significant risk threshold, the system enters the significant risk handling phase. If the verification fails but the significant risk threshold is not reached, the warning status can be extended once. The extension duration is 30 to 90 seconds, with a default of 60 seconds. The number of extensions cannot exceed one. The 60-second extension is used to cover one additional discharge delay. The number of extensions is limited to avoid long-term dwell time affecting the production line cycle time. Significant risks are triggered when the main unit current reaches the significant risk threshold, or when a trend warning persists for more than the warning duration. The significant risk threshold follows the registered definition, for example, when the main unit current reaches 85% of the rated current for 10 seconds and the feed flow rate decreases. After triggering, a significant risk handling combination is executed, which includes at least pulse feeding and rapid gap opening and closing. If the equipment has reverse disturbance or low-speed oscillation functions, short-term disturbance can be superimposed. Parameters such as pulse period, opening / closing ratio, gap opening / closing amplitude, and holding time are taken within the allowable range of the equipment and determined in combination with the equipment response time, material throughput time, gear boundary, and fine material constraints. The relevant values ​​and threshold versions are registered together for verification. During periods of significant risk, pulse feeding is employed while maintaining constant parameters. Pulse parameters must include at least the pulse period and the opening / closing ratio. The pulse period ranges from 3 to 12 seconds, with a default of 6 seconds. The opening / closing ratio ranges from 2:1 to 5:1, with a default of 3:1. The 6-second and 3:1 ratios are used to match the common crushing chamber passage time range and form a stable discharge interval, while maintaining an acceptable average feed intensity. Pulse effectiveness is verified based on the flow rate of the opening and closing sections. The mass flow rate of the open section feed should reach more than 85% of the set value, and the mass flow rate of the closed section feed should be less than 10% of the target value. If there is still significant feeding in the closed section, the pulse period can be increased to 8 to 12 seconds or the open section feed setting can be decreased by 10% to enhance the intermittent discharge effect and stabilize the pulse rhythm. The parameters for rapid opening and closing of the gap should include at least the instantaneous amplification amplitude, holding time, recovery value, and execution frequency. The instantaneous amplification amplitude is 5 mm to 15 mm, with a default of 10 mm. The holding time is 5 seconds to 20 seconds, with a default of 10 seconds. The recovery value is the original setting or the original setting plus 2 mm, and should not be less than the lower limit of the gap. The execution frequency is once every 60 seconds to 180 seconds, with a default of once every 120 seconds. 10 mm and 10 seconds are used to significantly increase the cross-section and cover one discharge lag process, while 120 seconds is used to limit wear caused by frequent mechanism movements. When the main unit current continues to rise and approaches the critical risk, the execution frequency can be increased to once every 60 seconds, and the pulse opening feed setting can be reduced by 5% to 10%. When the equipment has the necessary conditions, short-term disturbance should be enabled. The disturbance parameters should include at least the fields of insertion period and duration. The insertion period should be once every 120 to 180 seconds of operation, with a default of 120 seconds. The duration should be 0.5 to 2 seconds, with a default of 1 second. The 120-second interval is used to limit the disturbance frequency to reduce the risk of backflow, and the 1-second interval is used to break up the adhering material and prevent significant reverse accumulation. If the equipment does not have short-term disturbance, you can choose to add a quick opening and closing of the gap within the same cycle, or set the instantaneous amplification value to 15 mm and the holding time to 5 to 8 seconds to reduce the impact of long-term large gaps on particle size control. During periods of significant risk, a prohibition on adjustment rules is activated, prohibiting increases in rotational speed, reduction in clearance, increases in feed settings, and increases in return material ratio. Only one minor compensation is permitted when exceptional gating conditions are met. These exceptional gating conditions include: fine material belt flow not exceeding the baseline plus 10% for 300 consecutive seconds; screening current not exceeding the baseline plus 10% for 300 consecutive seconds; main unit current below 75% of rated current for 300 consecutive seconds; and the gear being in a low soft setting with no more than one trend warning in the past 30 minutes. After the exceptional gating conditions are met, minor compensation can be selected as increasing rotational speed by no more than 5% or reducing clearance by no more than 3 mm, and the system will enter observation mode for 120 seconds. This 120-second period is used to cover multiple monitoring update cycles and observe the lag effect of the compensation action on fine material, screening, and current. If any monitoring indicator exceeds the corresponding threshold during the observation mode, compensation will be revoked and the significant risk handling combination will be restored. The exit criteria for significant risks are determined using parallel review conditions. These conditions include at least the following: the main unit current is continuously below 70% of the rated current for 60 seconds with fluctuations falling back to within 1.5 times the baseline; the feed mass flow rate continuously reaches above 90% of the pulse average setting for 60 seconds; and the discharge level or differential pressure is not in a high-level state. After successful review, the process proceeds to recovery confirmation. Recovery confirmation uses a stepped approach to deactivate the treatment combination and restore the operating settings. The recovery includes at least the rapid opening and closing of the stop gap, restoring the gap to the original setting plus 2 mm, deactivating pulse feeding, and gradually restoring the feeding and speed parameters. Each step lasts from 60 to 120 seconds, with a default of 60 seconds. This 60-second duration covers multiple monitoring update cycles and allows observation of a stable decline in current and flow rate. The stepped recovery limits are: feed rate increases by no more than 10% per step, speed increases by no more than 5% per step, and gap reductions by no more than 4 mm per step. The connection relationship adopts a trigger jump method: when a critical risk or impact overload occurs during operation and the joint confirmation conditions are met, the emergency unblocking process is switched to. The joint confirmation conditions can be either the material level in the discharge chute being high for 3 consecutive seconds or the inlet and outlet pressure difference increasing for 10 consecutive seconds. When the fine material generation rate exceeds the limit or the screening load is abnormal, the fine material hard constraint process is switched to. If the trend warning occurs twice within 5 minutes after the significant risk is resolved, the current gear is maintained and included in the trend event frequency statistics for gear adjustment judgment. The 5-minute value is used to cover the short-term unstable period after the significant risk is resolved, and the two values ​​are used to distinguish between occasional fluctuations and recurring trends. The relevant records include at least the trigger time, trigger type, gear identifier, threshold version number, and other fields. The default parameters are selected within the range of the device's rated parameters and the registered threshold version, and include at least the following fields: boundary correction holding time of 60 seconds, monitoring update cycle of 2 seconds, mild pulse cycle of 8 seconds and opening / closing ratio of 3:1, early warning peak shaving feed reduction of 10% and speed reduction of 5%, early warning holding time of 90 seconds, significant risk pulse cycle of 6 seconds and opening / closing ratio of 3:1, gap rapid opening and closing amplification of 10 mm and holding for 10 seconds and frequency of 120 seconds, short disturbance insertion cycle of 120 seconds and lasting for 1 second, significant exit review duration of 60 seconds, and recovery confirmation single-stage duration of 60 seconds.

[0021] S4: When a critical risk or impact overload is determined, the following steps are executed sequentially: stop feeding and empty, low cycle time recovery, low speed and large clearance maintenance, and then proceed to recovery confirmation. The specific implementation is as follows: When the operation is determined to be at critical risk or impact overload, emergency unblocking is initiated. Emergency unblocking proceeds in the following order: stopping feeding and emptying, low cycle time recovery, maintaining low speed and large clearance, and recovery confirmation after the operation ends. The critical risk threshold, impact peak threshold, and joint confirmation threshold are recorded as threshold versions, and the rated current and baseline value are recorded as baseline package values. At the same time, the operating parameter version is also registered. The operating parameter version includes at least the equipment rated parameters, baseline package number, and threshold version number for traceability. The triggering conditions adopt a two-level triggering mechanism. The first level of triggering includes critical risk triggering and impact overload triggering. The threshold for critical risk triggering is that the crusher current reaches 100% of the rated current and lasts for 5 seconds, with an allowable range of 95% to 110% and a duration of 2 to 8 seconds. The threshold for impact overload triggering is that the main unit current jumps 30% relative to the baseline within 1 second, with an allowable range of 20% to 40%. The second level of triggering is a joint confirmation condition, used to exclude false triggering due to instantaneous impact and smooth discharge. The joint confirmation condition can be selected as a high level signal in the discharge chute for 3 consecutive seconds or a continuous increase in the inlet and outlet pressure difference for 10 seconds, with the durations selectable as 2 to 6 seconds and 8 to 20 seconds, respectively. The judgment criterion for continuous increase in pressure difference is that the average value of the 10-second short window increases continuously and the cumulative increase exceeds 5% to 15% of the baseline pressure difference, with a default value of 10%. The sampling period is consistent with the operation monitoring period. After entering the emergency unblocking state, stop feeding and empty the system. Reduce the feed setting to 0 and maintain it for 2 to 8 seconds, with a default of 5 seconds. The 5 seconds are used to cover the inertia of the feeding mechanism and the time it takes for residual material to pass through the belt, allowing the feed flow rate to stabilize below the confirmation threshold. The confirmation condition for stopping feeding is that the mass flow rate of the belt scale drops to less than 10% of the feed setting value before stopping feeding and remains below this value for 2 seconds. The 10% threshold is used to distinguish between almost no feeding and low-speed residual material, and the 2 seconds are used to filter out single-point burrs and confirm that the feeding stop state is stable. During the emptying process, the crusher continues to run and switches to a low speed. The low speed is set to the equipment's recommended lower limit or 5% above the recommended lower limit. The recommended lower limit is derived from the parameters on the equipment nameplate or the value registered in the instruction manual and is recorded in the operating parameter version. The operating parameter version should include at least the recommended lower limit, the current set speed, and the gap setting. The 5% above the lower limit is used to ensure discharge capacity while avoiding excessively low speeds that could cause poor discharge and secondary accumulation. When the equipment has an adjustable gap, the gap should be increased by 8 mm to 15 mm from the current setting, and the gap increase, maintenance, and recovery should not be less than the lower limit of the current gear gap. The venting can be terminated if either of the following conditions is met: the main unit current drops and stabilizes below 85% of the rated current for more than 3 seconds, or the discharge level changes from high to non-high. 85% is used to determine if the load has left the high-load sensitive area, and 3 seconds is used to eliminate false judgments of instantaneous drop. If the termination condition is not met and the discharge level is still high or the main unit current is still higher than 85% of the rated current, extended venting is allowed, with a single extension not exceeding 10 seconds and a total venting time not exceeding 40 seconds. 40 seconds is used to provide an effective venting window and limit the risk of ineffective wear and temperature rise caused by prolonged idling. If the total venting reaches the upper limit and is still not relieved, the system is placed in a restricted operation state and enters a low-cycle recovery mode. The low-cycle recovery mode is a more conservative value based on the normal range to reduce the risk of re-impact. After stopping feeding and emptying, the system enters a low-cycle recovery phase. The feeding level is 20% to 50% of the rated capacity, with a default of 35%. When in a restricted operating state, the feeding level can be selected from 20% to 35%, with a default of 25%. The 25% level is used to further reduce the probability of impact and re-blockage under restricted conditions, while maintaining a minimum throughput to avoid uncontrolled upstream accumulation. Low-cycle recovery uses short-cycle pulse feeding. The pulse parameters include at least the pulse period and the on / off ratio. The pulse period is 3 to 8 seconds, with a default of 4 seconds, and the on / off ratio is 2:1. The ratio is set to 4:1, with a default of 2:1. The 4-second and 2:1 ratios are used to create a stable intermittent discharge gap and maintain an acceptable average feed intensity, which is convenient for most feeding mechanisms. The pulse effectiveness is verified by the flow rate of the open and closed sections. The mass flow rate of the open section feed reaches more than 85% of the set value of the open section, and the mass flow rate of the closed section feed is less than 15% of the target value of the closed section. If there is still significant feeding in the closed section, the pulse period can be increased to 6 to 8 seconds or the open section setting can be decreased by 5% to 10% to enhance the stability and reproducibility of the intermittent effect. During the low-cycle recovery period, a large gap is maintained simultaneously. The gap is increased by 5 mm to 15 mm from the current setting, with a default increase of 10 mm. The maintenance time is 20 to 120 seconds, with a default of 60 seconds. The 10 mm increase is used to significantly increase the cross-section without causing particle size control imbalance. The 60-second maintenance is used to cover multiple pulse cycles to complete emptying and stabilize observation. During the maintenance period, the rotation speed is maintained in the low-speed range and controlled at no more than 90% of the gear speed limit to reduce the probability of residual soft light materials being re-entered. When the site has bypass stacking capability, the bypass can be opened to introduce some of the upstream material into the buffer stack. The buffer time is 2 to 10 minutes, with a default of 5 minutes. The 5 minutes is used to cover a period of upstream unloading fluctuation and reduce the pressure in the crushing chamber. During the bypass operation, the statistics and updates of the proportion of light materials and the frequency of trend events are paused. After the bypass ends, the statistics window is restarted with the bypass end time as the starting point of the statistics window. At the same time, the bypass start and end times, buffer duration, bypass status and other information are recorded. The recorded information includes at least the timestamp and the corresponding baseline package number for alignment and verification. After completing the low-cycle recovery, it enters a low-speed, large-clearance holding state to confirm that the blockage has been cleared and a stable observation window has been formed. During the holding period, the main unit current, feed flow rate, discharge level or differential pressure, screening current, and fine material belt flow rate are continuously monitored. The current fluctuation amplitude is determined according to the standard deviation of the 10-second short window. The holding end condition requires at least three conditions to be met continuously for a period of time. The end conditions include at least the main unit current being lower than 70% of the rated current for 20 to 60 seconds, the main unit current fluctuation amplitude not exceeding twice the baseline, the discharge level signal being released or the differential pressure falling back to near the baseline before triggering, and the feed flow rate reaching more than 90% of the average low-cycle setting. The differential pressure falling back can be selected to fall back to within ±10% of the differential pressure before triggering. The default setting is the main unit current. The current is kept below 70% of the rated current for 30 seconds to filter out short-term fluctuations and confirm that the load has returned to a stable non-sensitive area. After the termination condition is met, the system enters the recovery confirmation phase. If the termination condition is not met during the holding period and the critical threshold or peak overload is triggered again, the system returns to the stop feeding and emptying phase and enters the next unblocking cycle. When the cumulative number of cycles exceeds 3, the system enters the restricted operation state and triggers manual inspection. The 3 cycles are used to identify the structural blockage risk that has not been resolved despite repeated unblocking. Under the restricted operation state, the gear boundary and the hard constraint of fine material are still observed. It is not allowed to increase the speed or reduce the gap to forcibly increase production. The restricted operation state can be lifted after 10 consecutive minutes without triggering the critical risk and after the above termination conditions are stably met. The 10 minutes are used to cover multiple monitoring and statistical cycles and confirm that the trigger will not be repeated. After entering the recovery confirmation, a step-by-step recovery is adopted, gradually restoring the operating parameters under the constraints of the review conditions to reduce the risk of secondary criticality caused by the residue of soft and light materials. The increment of the step-by-step recovery can be selected as increasing the feed rate by 5% to 15% per step, increasing the rotation speed by 3% to 8% per step, and reducing the gap by 2 mm to 6 mm per step. The duration of a single step is 30 seconds to 180 seconds, with 60 seconds as the default. The 60 seconds are used to cover the lag in the response of the equipment and the material flow and to complete the review of this step, avoiding recurrence caused by rapid increases. A review is performed at the end of each step. The review conditions include at least the following fields: the main machine current does not exceed 80% of the rated current and the fluctuation range does not exceed twice the baseline, the fine material belt flow rate is not higher than the baseline plus 15%, and the screening current is not higher than the baseline plus 15%. After the review is passed, the next step is entered. If it fails, the current step is maintained or the step is reversed by one step. The reversal can be selected as the feed rate reversal by 10%, the rotation speed reversal by 5%, the gap increase by 4 mm and maintained for 60 seconds before reviewing again. The 60 seconds are used to cover a round of response lag and to observe the current and fine material decline. Recovery confirmation and adjacent processes are connected by trigger jumps. When a trend warning is triggered, it switches to warning peak shaving. When the fine material production rate exceeds the limit or the screening load is abnormal, it switches to the fine material hard constraint process and stops further reducing the gap or increasing the speed. When an impact peak occurs and the joint confirmation conditions are met, it switches to stop feeding and emptying to avoid interlocking shutdown. To reduce the probability of recurrence after the critical release, an emergency window lock and sequence constraints are set. The emergency window lock lasts for 120 seconds. The 120 seconds are used to cover the short period of instability after the emergency is released and to restrict production increase commands before the current and material level have completed the fall back verification. During the lock, the increase of feeding, the increase of speed and the reduction of gap are restricted. The lock is released after the first step verification condition is met. The sequence constraints require that the stop feeding and emptying, low cycle recovery and low speed and large gap be executed in a fixed order. Each stage is allowed to switch after the corresponding end conditions are met. The relevant records include at least the start and end time of the emergency window, the lock duration, the time when the release condition is met and the time of sequence switching, and are registered in the operation parameter version. Default parameters are selected and registered within the range of equipment rated parameters, baseline package diameter, and registered threshold version. At least the following fields are included: critical risk trigger: rated current 100% for 5 seconds; impact spike trigger: current jump of 30% within 1 second; joint confirmation conditions can be selected as: high discharge level for 3 consecutive seconds or inlet / outlet pressure difference for 10 consecutive seconds; stop feeding for 5 seconds; total evacuation time upper limit of 40 seconds; low cycle feeding: 35% and restricted low cycle feeding: 25%; low cycle pulse period: 4 seconds and opening / closing ratio: 2:1; large gap amplification: 10 mm and held for 60 seconds; bypass buffer: 5 minutes; holding stage current below 70% of rated current for 30 seconds; maximum number of cycles: 3; single-stage step recovery for 60 seconds; emergency window lock for 120 seconds.

[0022] S5: When the fine material generation or screening load exceeds the limit, it is forbidden to increase the speed or reduce the gap. Instead, switch to screen cleaning, limited material return, and staged recovery. The specific implementation is as follows: When the fine material generation rate exceeds the limit or the screening load is abnormal, a hard constraint on fine material is activated. Using the fine material generation and screening capacity as constraints, increasing the rotation speed or narrowing the gap to prevent blockage or production increases is prohibited. This involves implementing screen cleaning and load reduction, limiting return material, controlling oversized material, and phased recovery, and coordinating with gear boundaries, entanglement risk suppression, and emergency unblocking. The relative threshold is referenced to the baseline package record value. The time window is suitable for filtering short-term fluctuations to determine trend stability. The percentage threshold represents the continuous deviation from the baseline. The threshold value is taken within the registered threshold version range, and the recorded fields must include at least the threshold version number, baseline package number, trigger frequency, and receipt result. Entry conditions are triggered by dual channels; entry is possible if either channel is active. For excessive fine material generation rate, the fine material conveying path mass flow rate can be increased by 10% to 35% relative to the baseline for 60 to 300 seconds; the default is an increase of 20% for 180 seconds, designed to match minute-level fluctuations in fine material and filter short-term volatility. For abnormal screening load, the screening machine current can be increased by 10% to 25% relative to the baseline for 60 to 180 seconds; the default is an increase of 15% for 120 seconds, or the oversize return ratio can be increased by 5% relative to the baseline. The percentage increases to 15 percentage points and last for 120 to 300 seconds, with a default increase of 10 percentage points and lasting for 180 seconds, are used to reflect the continuous performance of screen surface load increase and classification efficiency decrease. The screening current baseline and the return material ratio baseline are taken from the baseline package records and bound to the threshold version. The sources of relevant statistics include at least the fine material mass flow rate, the return material ratio on the screen, and the oversize ratio on the screen. They are preferentially calculated by the corresponding conveyor belt scale and the total feed belt scale. When belt scales are not available, fixed-duration weighing sampling is used for conversion. To reduce false triggering, a consistency confirmation rule is adopted. When the fine material channel is triggered but the screening load is not, a screen cleaning is performed first and observed for 60 seconds. If the fine material is still higher than the baseline plus 10% to 25% of the threshold, the default value is the baseline plus 15%, and a hard constraint is entered. The 60-second period is mainly used to cover the lag between the screen cleaning action and the recovery of screen permeability. When the screening load channel is triggered but the fine material is not, a screen cleaning and load reduction is performed first and the fine material change is observed for 120 to 300 seconds, with a default value of 180 seconds. If the fine material rises above the baseline plus 5% to 20% of the threshold within the observation window, the default value is the baseline plus 10%, and a hard constraint is entered. The 180-second period is mainly used to cover the minute-level stabilization process of the fine material flow rate and filter short-term fluctuations. The above baselines are taken from the baseline package record values ​​and bound to the threshold version. The relevant records include at least the trigger channel, the start and end times of the observation window, the baseline value, the judgment threshold, and the judgment result. After entering a hard constraint, a hard constraint holding period begins, lasting 120 to 300 seconds (default 180 seconds). During this period, the current gear indicator is frozen and the gear parameter boundaries are used. Simultaneously, prohibition rules and instruction interception / replacement rules are enabled. The holding period is primarily used to cover the response lag of screen cleaning intensity adjustment and return material step switching, preventing repeated entry and exit from hard constraints due to short-term drops. Prohibition rules include at least the following constraints: not allowing increasing crushing speed, not allowing narrowing crushing gap, not allowing increasing feed setting, not allowing increasing return material upper limit, and not allowing decreasing screen cleaning intensity. Subsequent steps... The same applies to the segment; the command interception and replacement rule is that when a command to increase the speed or decrease the gap is received, it is replaced with a small action in the opposite direction. The small action can be a speed reduction of 3% to 8% or a gap increase of 2 mm to 6 mm. This range is used to form an observable load reduction change without causing a sudden drop in production capacity or particle size runaway; the replacement action does not break through the current gear boundary and the interception information is recorded; the operation record adopts a unified standard and includes at least the following fields: timestamp, trigger channel, threshold version source, gear identifier, key measurement value, executed action and receipt result, etc., for review and cause investigation; The screen cleaning and load reduction function prioritizes restoring screening permeability and reducing material return and excessive fine material levels caused by screen clogging. When the screen has amplitude adjustment, the amplitude can be increased by 5% to 20%, with a default of 10%, and maintained for 1 to 10 minutes, with a default of 3 minutes. This is used to increase the throwing intensity and cover multiple screening cycles without exceeding the equipment's allowable range. When a screen cleaning device is configured, the cleaning frequency can be increased from 10 times per minute to 20 times per minute, with an allowable increase of 1 to 3 times, to improve the cleaning intensity in a smoother manner. When both functions are available, the cleaning frequency should be increased first, and the amplitude increase should be added only when the screen current is still 15% higher than the baseline. During screen cleaning, the feed rate should be reduced simultaneously. The adjustment range can be selected from 5% to 20%, with a default of 10%, to reduce screen buildup and allow space for screen cleaning; the feed adjustment is performed within the upper limit of the feed setting, without increasing the feed to flush the screen surface; the screen cleaning and return verification conditions can be selected as the screen current falling back to within 10% of the baseline for 60 seconds, or the proportion of material returning to the screen falling back to within 5 percentage points of the baseline for 180 seconds, to filter short-term current fluctuations and confirm stable return material; if the verification fails, the screen cleaning can be extended once, with the extension time selectable from 1 minute to 5 minutes, with a default of 3 minutes, and the feed is further reduced by 5% to 10%; the extension number is set to 1 time, to avoid prolonged screen cleaning masking the root cause of over-crushing; After the screen clearing process, the system switches to limited return material control. Limited return material aims to reduce the number of cyclic crushing cycles to prevent further accumulation of fine material. The return material limit can be set to 70% of the current limit, or reduced by 5 to 20 percentage points. The default value is a 10 percentage point reduction, for example, from 35% to 25%. This default value is based on a balance between the reduction in cyclic crushing frequency and the risk of material accumulation on the screen. The return material reduction uses a stepped approach, with each reduction not exceeding 10 percentage points and an interval of 60 seconds, primarily considering the return material... There is a response lag between the circuit and the material flow to avoid sudden interruption that could cause impact from material buildup on the screen. When there are multiple return paths, the return material can be preferentially directed to the low-energy crushing channel or the temporary storage channel. The low-energy crushing channel can be selected as a low-speed or shear-type crushing condition. The temporary storage time is 10 to 60 minutes, with a default of 20 minutes, to wait for the incoming material to transition from the high-soft batch and reduce the circulation burden of the high-fine material stage. The temporary storage record should include at least the temporary storage start and end times, the return batch number, and the corresponding baseline package number to maintain consistent statistical standards and facilitate verification. When the fine material exceeds the limit or the screening load is abnormally high and continues to be established, the hard constraint execution state is entered. The speed can only be maintained or reduced, and the gap can only be maintained or increased. Allowed actions include at least reducing the feed, reducing the speed, increasing the gap, enabling pulse feeding, performing short-term disturbance, limiting backflow, and strengthening screen cleaning. The pulse feeding parameters are within the range of the registered threshold version. The cycle can be 6 to 10 seconds, with a default of 8 seconds. The opening-closing ratio can be 2:1 to 4:1, with a default of 3:1. It is used to form intermittent discharge to suppress continuous shearing and maintain the average feed intensity. Short-term disturbance is enabled when the equipment supports it. The disturbance insertion cycle can be 120 to 180 seconds, with a default of 120 seconds. The disturbance duration can be 0.5 to 2 seconds, with a default of 1 second. It is used to loosen the attached material and avoid backflow caused by excessive disturbance. To avoid persistently coarse particle size during hard constraints, an oversize control condition is set. The oversize ratio is defined as the proportion of material mass flow rate above the target particle size upper limit to the total feed mass flow rate, using the sieve aperture or classification boundary as the aperture. The oversize control condition can be set to an oversize ratio exceeding 25% to 45% for 180 to 600 seconds, with the default being exceeding 35% for 300 seconds. This is mainly used to balance the different production lines' reliance on recycled materials and to filter short-term particle size clusters. When the oversize control condition is met, path adjustments and screening efficiency improvements are allowed. However, the rules of prohibiting increasing the rotation speed and reducing the gap still apply. The path adjustment should include at least the following: diverting the oversized material to the low-energy crushing channel or temporary storage channel, temporarily increasing the screen cleaning frequency, and increasing the amplitude. After adjustment, an observation period is entered, which lasts from 180 to 300 seconds, with a default of 240 seconds, to observe the stable response of fine material and screening load. If the fine material flow rate further increases beyond the threshold range of 20% to 35% above the baseline during the observation period, with a default of 25% above the baseline, the adjustment is canceled and the temporary storage ratio is increased to ensure timely convergence when the fine material deteriorates significantly. When the fine material and screening load drop to a manageable level, a phased recovery process begins. The criteria for this recovery are: fine material flow rate not exceeding the baseline plus 10% for 300 consecutive seconds, and screening machine current not exceeding the baseline plus 10% for 300 consecutive seconds. Simultaneously, the return material ratio must return to within the current gear's return upper limit. The 300-second period is used to confirm stable recovery. Both the baseline and gear upper limit use the registered caliber. Each phase of the phased recovery lasts from 30 to 180 seconds, with a default of 60 seconds. The recovery sequence is: first, restore the screen cleaning intensity to normal; then, gradually restore the return upper limit; and finally, gradually restore the feed and rotation speed. The interval between phases occurs after the fine material stabilizes. Only then is reduction allowed, used to first restore the screening load and then gradually restore the cyclic crushing and feeding intensity; the recovery range includes at least the following constraints: the return material is increased by no more than 5 to 10 percentage points per stage, the feed material is increased by no more than 10% per stage, the rotation speed is increased by no more than 5% per stage, and the gap is reduced by no more than 3 mm at a time. Among them, 3 mm is used to limit the sudden increase of fine material caused by the rapid tightening of the gap; a verification condition is set at the end of each stage. The verification condition is that the fine material flow rate is not higher than the baseline plus 12% and the screening current is not higher than the baseline plus 12% for 60 seconds. If the condition is not met, the current stage is stopped or the stage is reversed by one stage. During the phased recovery period, jump rules are set to maintain process continuity: when fine material exceeds the limit again or screening load is abnormal, return to the hard constraint maintenance period and enter the screen cleaning, load reduction and material return restriction; when a trend warning occurs, switch to warning peak shaving; when a critical risk or impact overload occurs and the joint confirmation conditions are met, switch to emergency unblocking. The hard constraint state is set to effective upon entry and is released after 10 minutes of continuous and stable operation following the completion of the phased recovery. The 10-minute value is used to cover multiple monitoring update cycles and confirm that it will not be triggered repeatedly. During the hard constraint period, action consistency information is recorded. The action consistency information includes at least the number of times the prohibited action was intercepted, the return material limit switching value, the network clearing intensity change value, the verification condition hit time, the trigger channel, the threshold version number, and the sampling caliber source, etc., which are used to verify the cause and prove the execution process of the hard constraint rules.

[0023] The technical solution of this embodiment involves a construction waste recycling production line that processes mixed incoming materials, including soft lightweight materials such as films, fibers, woven bags, foam, and wood chips, as well as hard bulk materials such as concrete, bricks, and mortar agglomerates, which vary with each trip. Before operation, the line collects data on pre-screening, feeding, crushing, and screening operations, freezes the screen aperture configuration, and sets initial parameters. Once the gate conditions are met, the steady-state window is closed to solidify the baseline package, and version information is registered. The baseline package solidification entanglement risk, abnormal load, and fine material generation rate are assessed using grading thresholds and time windows, along with consistency confirmation conditions. During operation, the line determines the gear level based on the proportion of lightweight materials and the frequency of trend warnings. When the proportion of soft materials increases, the line is upgraded, and feeding, speed, gap, and return material boundaries are tightened. When the proportion of soft materials decreases, the line is downgraded while maintaining constraints. After gear switching, verification is performed using quantities such as the return material ratio. Materials not verified are reverted and marked with a restricted indicator. The control cycle continuously collects the host current, feed flow rate, discharge level or differential pressure, screening current, fine material flow rate and return ratio, and performs validity verification. When entering the warning state, peak reduction is performed, and the gap is enlarged when the gap margin is met. The verification exit is followed by recovery according to the step rule. When it escalates to a significant risk, the pulse feeding verifies the opening and closing section, the linkage gap opens and closes quickly, and short-term disturbances can be selected. Prohibition rules, exception gate control, and observation cancellation are implemented. If the critical or impact overload is reached and the joint confirmation is established, the blockage is unblocked according to the fixed sequence of material stop receipt, low-frequency pulse, low speed and large gap, and recovery is performed according to the step verification rule. If the fine material or screening load is too large, hard constraint is entered, the speed is increased or the gap is reduced, and the screen clearing receipt, limited return material and path redirection, and over-diameter observation cancellation are implemented. After meeting the fallback criterion, recovery is performed in stages and the flow is connected to the previous flow according to the jump rule.

[0024] It should be noted that this invention can be deployed on the device itself to realize embedded applications, or it can run on a PC or other terminal with a user interface, thereby meeting various hardware environments and usage requirements.

[0025] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above embodiments can be implemented in whole or in part by a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions of the embodiments of this application are implemented in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted wirelessly or wiredly from one website, computer, server, or data center to another website, computer, server, or data center. Wired methods include optical fiber, twisted pair, coaxial cable, etc. Wireless methods include infrared, microwave, etc. Available media include any available media that can be accessed by a computer or data storage devices such as servers and data centers that contain one or more sets of available media. Available media can be magnetic media (floppy disks, hard disks, magnetic tapes), optical media (DVDs), or semiconductor media. Semiconductor media can be solid-state drives.

[0026] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0027] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage synergistic crushing and screening resourceful treatment method for construction waste, characterized in that, include: S1: Collect the operation volume of pre-screening, feeding, crushing and screening, establish a steady-state baseline, and set the judgment thresholds and time windows for entanglement risk, abnormal load and fine material generation rate; S2: Based on the proportion of soft and light materials in the incoming material, the material is divided into low soft, medium soft, and high soft grades, and the upper limit of feeding, the upper limit of rotation speed, the lower limit of gap, and the upper limit of return material are limited respectively, and the grade holding time is set. S3: During operation, the risk of entanglement and the load status are determined in real time. When an early warning is issued, the feed rate and speed are reduced or the gap is increased. When a significant risk is detected, the feed rate is switched to pulse feeding and the gap is quickly opened or closed or short-term disturbance is executed. S4: When a critical risk or impact overload is determined, the following steps are executed in sequence: stop feeding and empty, low cycle time recovery, low speed and large gap maintenance, and then proceed to recovery confirmation. S5: When the fine material generation or screening load exceeds the limit, it is forbidden to increase the speed or reduce the gap. Instead, switch to screen cleaning, limited return material and staged recovery.

2. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, Collect data on pre-screening, feeding, crushing, and screening operations to establish a steady-state baseline, including: Before establishing the baseline, set the effective aperture for the pre-screening, feeding, crushing and screening measuring points, and freeze the screen hole configuration, feeding settings, speed settings and gap settings. Once the gating conditions are met, the steady-state window is opened to solidify the baseline package. The baseline package records the sampling method, sampling duration, window start and end times, and parameter version identifier.

3. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, Set thresholds and time windows for judging entanglement risk, abnormal load, and fine material generation rate, including: When setting the threshold, the baseline packet is used as a reference for the relative threshold, and the device's rated parameters are used as a reference for the absolute threshold. The entanglement risk, load anomaly, and fine material generation rate are set as graded trigger conditions, and corresponding time windows are configured for each level of trigger condition. At the same time, consistency confirmation conditions are set. The threshold is calibrated based on the trigger frequency and the threshold version number is registered. The threshold version number is then associated with the baseline package number and recorded.

4. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, Based on the proportion of soft and lightweight materials in the incoming materials, they are divided into low-soft, medium-soft, and high-soft grades, including: The gear selection uses the statistical caliber of the proportion of light objects and introduces the frequency of trend warning events as a gate control criterion; When the weighing data for light objects is missing, the proportion of light objects is calculated by converting the difference between adjacent weighing points, or by using alternative statistical methods. During periods of restricted operation, the count of trend warning events will not be included in the downgrade determination. The statistical period is registered in alignment with the baseline package number.

5. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, Each setting defines the upper limit for feeding, the upper limit for rotational speed, the lower limit for gap, and the upper limit for return material, and sets the holding time for each gear position, including: Parameter boundaries are pre-generated for each gear and gear holding constraints are set, while the boundary switching sequence and single adjustment limit are fixed. The shifting between gear levels is performed using a segmented buffering method; After gear switching, the verification quantity based on the return material ratio is reviewed. If the review fails, a rollback adjustment is performed.

6. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, During operation, real-time assessment of entanglement risk and load status is performed, including: Operation monitoring is conducted within the gear range boundaries, and the host current, feed flow rate, discharge material level or differential pressure, screening current, fine material flow rate and return ratio are collected according to a uniform fluctuation caliber. Perform validity checks on the collected data, and perform boundary correction when data exceeds the limits; When the critical quantity is invalid, switch to conservative operation and record the sampling caliber and version identifier.

7. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, When a warning is triggered, the feed rate and rotation speed are reduced or the gap is increased. When a significant risk is detected, the system switches to pulse feeding and performs rapid gap opening and closing or short-term disturbances, including: The early warning and response measures include peak shaving and gap amplification based on the gap margin branches, while setting verification exit conditions and tiered recovery rules. Significant risk management involves pulse feeding, with verification of pulse opening and closing segments, rapid opening and closing of linkage gaps, and optional short-term disturbances. In the handling of significant risks, rules prohibiting adjustment, exception gating, and observation cancellation are set, and status transitions are performed according to review conditions and triggering conditions.

8. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, When a critical risk or impact overload is determined, the following steps are executed sequentially: stop feeding and empty the system, resume at a low cycle time, maintain a low speed and large clearance, and then proceed to the recovery confirmation stage, including: Emergency response is initiated when the risk trigger and the consistency verification gate for material output are established. The material stop operation is confirmed based on the flow rate receipt. Low-cycle recovery employs pulse feeding, and the pulse opening and closing segments are verified. Under the constraints of large clearance and low speed, the termination condition is determined. Once the condition is met, the operating parameters are restored according to the step-by-step verification rule, and the rollback rule, trigger jump rule, locking constraint and restricted identifier recording rule are set.

9. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, When the fine material generation or screening load exceeds the limit, it is forbidden to increase the speed or reduce the gap, including: When the fine material generation rate exceeds the limit or the screening load is abnormal, the system enters the fine material hard constraint state and activates the prohibition rule, prohibiting the increase of rotation speed and the reduction of gap. The trigger threshold for fine material hard constraints is referenced to the baseline packet record value, and a relative deviation judgment caliber is adopted. The trigger channel, threshold version number, trigger frequency and receipt result are recorded. Under the condition of hard constraint of fine materials, the handling rules of cleaning the net and reducing load, limiting return material and controlling over-diameter are implemented.

10. The multi-stage synergistic crushing and screening resourceful treatment method of construction waste according to claim 1, characterized in that, The process involves switching to network cleanup, limiting material returns, and phased recovery, including: When the system is under hard constraint of fine materials, the network is cleared and the load is reduced, and the receipt is verified. If the receipt review fails, implement return material restrictions and return path redirection; Set the path adjustment and observation cancellation rules for overshoot control, and enter the step-by-step recovery after the fallback criterion is met; The phased recovery restores the screen cleaning intensity, return material limit, and feed speed in sequence, and sets jump rules and status recording rules.

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