Intelligent control method for hydraulic support backwashing filter and electronic equipment

Abstract

The invention relates to the technical field of intelligent control of hydraulic supports of fully mechanized coal mining faces of coal mines, in particular to an intelligent control method and electronic equipment for a backwashing filter of a hydraulic support, and the method comprises the following steps: acquiring position information of a coal mining machine on a working face, and judging whether the coal mining machine is in a safe operation period allowing backwashing or not based on the position information; receiving at least one backwashing trigger instruction from a timing mode, a differential pressure mode or a manual mode in the safe operation period; safety verification is executed on any received backwashing trigger instruction, and the safety verification comprises the steps that whether personnel exist in the target hydraulic support and a preset adjacent area of the target hydraulic support or not is detected, and whether the target hydraulic support is in an active operation state or not is detected; if the safety verification is passed, dynamically determining the backwashing duration according to the type of the backwashing trigger instruction, and controlling a backwashing filter of the target hydraulic support to execute backwashing operation; and if the safety verification is not passed, suspending the backwashing trigger instruction and waiting until the safety condition is met.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology for hydraulic supports in fully mechanized coal mining faces, and particularly to an intelligent control method and electronic device for a hydraulic support backwash filter. Background Technology

[0002] In the hydraulic support system of fully mechanized coal mining faces, emulsion serves as a key working medium for power transmission and lubrication, and its cleanliness directly affects the reliability and service life of hydraulic components. To ensure the cleanliness of the emulsion, backwash filters are widely used in the fluid supply circuit of hydraulic supports. These filters typically include a valve body, filter element assembly, pilot control valve (such as a solenoid pilot valve), and flow channels such as inlet, outlet, and drain ports. Their core function is to intercept impurities through the filter element and, when the filter element becomes clogged, use reverse fluid flow to flush away and discharge the attached impurities, thereby achieving automatic regeneration of the filter element.

[0003] Currently, the start-up control of backflushing filters largely relies on preset rules or single sensor signals, such as timed start-up based on fixed time periods, automatic response based on inlet and outlet pressure difference thresholds, or commands initiated directly by manual operation. However, these control methods generally suffer from insufficient perception of the actual operating conditions of the system, lack of safety verification mechanisms, and are prone to ineffective flushing or delayed response. Especially in complex and variable downhole operating environments, performing backflushing operations when the equipment is in a critical operation phase or when personnel are near the area may cause instantaneous depressurization of the hydraulic system, posing a safety hazard. Therefore, existing technologies struggle to simultaneously ensure the timeliness, effectiveness, and operational safety of backflushing. Summary of the Invention

[0004] This invention provides an intelligent control method and electronic device for a hydraulic support backwash filter, which solves the defects in the prior art where the backwash operation lacks working condition perception and safety verification mechanism, and is prone to blind execution in unsafe periods or dangerous working conditions, leading to system depressurization, equipment malfunction or personnel safety risks. It achieves safe, timely and intelligent collaborative control of the backwash process.

[0005] This invention provides an intelligent control method for a hydraulic support backwash filter, comprising: acquiring the position information of a coal mining machine on the working face, and determining whether the current operation is within a safe period for backwashing based on the position information; receiving at least one backwash trigger command from a timed mode, a differential pressure mode, or a manual mode during the safe operation period; performing a safety check on any of the received backwash trigger commands, the safety check including: detecting whether there are personnel in the target hydraulic support and its preset adjacent area, and detecting whether the target hydraulic support is in an active state; if the safety check passes, dynamically determining the backwash duration according to the type of the backwash trigger command, and controlling the backwash filter of the target hydraulic support to perform a backwash operation; if the safety check fails, suspending the backwash trigger command and waiting until the safety conditions are met.

[0006] According to one embodiment of the present invention, in the timed mode, the generation of the backwash trigger command includes: monitoring whether a preset reference cycle has been reached based on the system clock; when the reference cycle is reached, detecting the current differential pressure value of the backwash filter of the target hydraulic support; if the current differential pressure value is less than a preset differential pressure threshold, canceling the current timed backwash and extending the next reference cycle; if the current differential pressure value is greater than or equal to the differential pressure threshold, generating the backwash trigger command, and dynamically calculating the duration of the current backwash based on the difference between the current differential pressure value and the differential pressure threshold.

[0007] According to one embodiment of the present invention, in the differential pressure mode, the generation of the backwash trigger command includes: real-time monitoring of the differential pressure value of the backwash filter of the target hydraulic support; when the differential pressure value is continuously greater than a preset differential pressure threshold, generating the backwash trigger command, and dynamically calculating the duration of this backwash according to the degree to which the differential pressure value exceeds the differential pressure threshold.

[0008] According to one embodiment of the present invention, in the manual mode, the generation of the backwash trigger command includes: receiving a manual backwash request from the operator for a hydraulic support of an adjacent frame; and disabling the receipt of a manual backwash request for the hydraulic support of the frame where the operator is located.

[0009] According to one embodiment of the present invention, the safe operating period is the period during which the coal mining machine operates in the starting or ending triangular coal working area of ​​the working face.

[0010] According to one embodiment of the present invention, when multiple backwash trigger commands of different modes are received simultaneously, the method further includes arbitrating the multiple backwash trigger commands and determining a backwash trigger command to be executed according to a preset priority rule.

[0011] According to one embodiment of the present invention, the preset priority rule is: the priority of the differential pressure mode trigger instruction is higher than that of the manual mode trigger instruction, and the priority of the manual mode trigger instruction is higher than that of the timed mode trigger instruction.

[0012] According to one embodiment of the present invention, before controlling the backwashing filter of the target hydraulic support to perform backwashing operation, a backwashing operation prompt message is sent to the monitoring center.

[0013] According to one embodiment of the present invention, the active operating state includes at least one of raising the column, lowering the column, and moving the frame.

[0014] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program to implement the intelligent control method for the hydraulic support backwash filter of the above embodiments.

[0015] The intelligent control method and electronic device for hydraulic support backwashing filters provided by this invention obtains the real-time position information of the coal mining machine on the working face to determine whether the current period is within a safe operating time for backwashing. It only receives backwashing trigger commands from timed, differential pressure, or manual modes during the safe operating time and performs dual safety checks on each command. Specifically, this includes detecting whether there are personnel in the target support and its adjacent area, and whether the target support is in an active operation state such as raising, lowering, or moving the support. Only when the safety check passes is the backwashing duration dynamically determined according to the trigger command type and the backwashing operation executed; otherwise, the command is suspended until the safety conditions are met, thereby effectively avoiding backwashing under dangerous conditions and ensuring stable system operation and underground work safety. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating the intelligent control method for the hydraulic support backwash filter provided by the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0019] This invention proposes an intelligent control method for backwashing filters on hydraulic supports. This method operates within the electro-hydraulic control system of the hydraulic support or a dedicated intelligent backwashing actuator. Its core lies in constructing a central collaborative decision-making and dynamic optimization controller. This controller, within a unified decision-making framework, receives and integrates five categories of signals in real time: system clock signal, filter element differential pressure (ΔP) signal, personnel positioning signal, current operating status signal of the support (from the support controller), and operator command signal. This enables a comprehensive upgrade to the three traditional control modes—timed, differential pressure, and manual—in terms of intelligence and safety, achieving efficient and safe backwashing control driven by multi-source information collaboration.

[0020] Figure 1 This is a flowchart illustrating the intelligent control method for the hydraulic support backwash filter provided by the present invention, as shown below. Figure 1 As shown, the method includes the following: Step 110: Obtain the position information of the coal mining machine on the working face and determine whether the current operation is within a safe period for backwashing. The operating coordinates of the coal mining machine on the scraper conveyor are obtained in real time through the longwall face control system or a coal mining machine positioning device (such as infrared, UWB, or encoder positioning). Combined with a preset working face zoning model (e.g., dividing the working face into a central main coal cutting area and two triangular coal cutting areas at both ends), the system determines whether the coal mining machine is currently located in the initial or final triangular coal cutting area. For example, the system only recognizes a "safe operating period" when the coal mining machine is in a triangular coal cutting area, far from the target hydraulic support, and the support group is not in a high-intensity coordinated action phase, allowing subsequent backwashing operations to be performed. This avoids affecting the stability of the supports due to the instantaneous interruption of the emulsion caused by backwashing in the main coal cutting area or under high-dynamic conditions.

[0021] Step 120: During safe operating periods, receive at least one backwash trigger command from either timed mode, differential pressure mode, or manual mode. After confirming that a safe operating period has begun, the system can open three trigger channels. In timed mode, commands are generated according to a preset cycle based on the system clock; in differential pressure mode, commands are automatically generated based on real-time data from the filter element inlet and outlet differential pressure sensors when ΔP continuously exceeds a threshold; in manual mode, requests from the operator via the adjacent rack controller are responded to (initiations to this rack are prohibited). These three modes do not operate in isolation but are connected in parallel to the central decision module as multi-source input signals, forming the trigger basis for "multi-mode conditional coupling."

[0022] Step 130: Perform a safety verification on any received backwash trigger command. Verify through a unified safety access mechanism to ensure that the backwash action will not be performed when personnel are near or during the critical period of the support operation, thus realizing a closed-loop safety logic of "triggering verification and blocking if verification fails".

[0023] The security verification specifically includes: Step 131: Detect whether there are personnel in the target hydraulic support and its preset adjacent area, and whether the target hydraulic support is in an active operating state. Use a downhole personnel precise positioning system (such as RFID or UWB tags) to determine whether there are personnel in the target support and within 1-2 supports to its left and right; simultaneously read the action status words output by the support's electro-hydraulic control system to identify whether the target support is performing active actions such as raising, lowering, or moving the support column. If any condition is met (personnel present or active operation in progress), the state is determined to be unsafe.

[0024] Step 132: If the safety check passes, the backwash duration is dynamically determined based on the type of backwash trigger command, and the backwash filter of the target hydraulic support is controlled to perform the backwash operation. Specifically, in timed mode, if the current differential pressure is low, the backwash is shortened or canceled; in differential pressure mode, the backwash duration increases linearly or in segments as ΔP exceeds the threshold; in manual mode, the default safe duration is used. After determining the duration, the central controller sends a pulse signal to the electromagnetic pilot valve of the target support to switch the flow path to complete the backwash, and simultaneously reports the operation status to the monitoring center.

[0025] Step 133: If the safety check fails, the backwash trigger command is suspended and the system waits until the safety conditions are met. The suspended command is temporarily stored in a priority queue. The system continuously polls for safety conditions (such as personnel evacuation, action completion, coal mining machine position update, etc.). Once all safety constraints are lifted, the original command is immediately resumed to ensure that the flushing requirement is not lost, while eliminating the risks of forced execution.

[0026] In practical applications, the aforementioned intelligent control method for hydraulic support backwash filters can be deployed in the main controller or dedicated edge intelligent terminal of the electro-hydraulic control system of the support in a fully mechanized mining face. For example, in an 8.8-meter ultra-high mining face, when the coal mining machine is cutting coal at high speed in the middle, even if the differential pressure of a support filter element exceeds the limit, the system will temporarily suspend backwashing because it is in an unsafe period. After the coal mining machine enters the triangular coal area at the end, the system automatically activates the safety window. If the differential pressure is still high at this time, after confirming that no personnel are approaching and the support is stationary, a backwashing operation with optimized duration is precisely executed. This method, through multi-mode condition coupling and dynamic decision-making mechanisms, deeply couples the three triggering modes of timing, differential pressure, and manual operation with "differential pressure status verification," "personnel-action safety interlock," and "adjacent support operation mandatory rules," respectively. The central controller performs dynamic arbitration and safety decisions based on real-time multi-source information, effectively solving the problems of high blindness, weak safety, and rigid response of traditional control, and improving the reliability and intelligent operation and maintenance level of the hydraulic system.

[0027] According to a hydraulic support backwash filter intelligent control method of the present invention, in timed mode, the generation of backwash trigger command includes: Step 121: Monitor the system clock to see if the preset baseline cycle has been reached. The central controller can have a built-in high-precision real-time clock module to establish a basic backwash check cycle according to user configuration or system default settings (such as every 2 hours). This cycle does not force backwashing, but serves as a "health assessment window" to determine whether it is necessary to start the backwashing process, thereby avoiding the blindness of "always flushing at the appointed time" in traditional timed control.

[0028] Step 122: Upon reaching the baseline cycle, detect the current differential pressure value of the backwash filter of the target hydraulic support. At the moment the baseline cycle arrives, the controller actively reads the pressure sensor data installed at the inlet and outlet of the backwash filter of the target support, and calculates the differential pressure ΔP across the filter element in real time. This serves as the core basis for judging the actual degree of filter element contamination, realizing a fusion judgment mechanism of "timed triggering and differential pressure verification".

[0029] Step 123: If the current differential pressure value is less than the preset differential pressure threshold, cancel this timed backwash and extend the next baseline cycle. When ΔP is lower than the threshold indicating that the filter element is still unobstructed (e.g., 0.5 MPa), it means that cleaning is not required at this time. The system not only skips this backwash operation to save emulsion and energy, but also dynamically adjusts the next inspection cycle (e.g., extend it by 20%~50%), so that the control strategy adapts to the actual cleanliness of the working conditions and improves the system operating efficiency.

[0030] Step 124: If the current differential pressure value is greater than or equal to the differential pressure threshold, a backwash trigger command is generated, and the backwash duration is dynamically calculated based on the difference between the current differential pressure value and the differential pressure threshold. The system maps the degree of exceedance (e.g., ΔP - threshold = 0.2MPa, 0.5MPa, 1.0MPa) to a preset flushing duration table or uses a linear / piecewise function model to automatically determine the optimal flushing time (e.g., 5 seconds, 8 seconds, 12 seconds), ensuring short flushing for minor blockages and thorough cleaning for severe blockages, avoiding insufficient or excessive flushing.

[0031] According to the intelligent control method for backwashing filters of hydraulic supports of the present invention, in differential pressure mode, the generation of backwashing trigger commands includes: Step 125: Monitor the differential pressure value of the backwash filter of the target hydraulic support in real time. The controller preferably uses high-frequency sampling (e.g., 1-10 times per second) to continuously collect the pressure signals at the inlet and outlet of the filter element. The stability and reliability of the differential pressure data can be ensured by digital filtering and outlier removal algorithms, providing a basis for timely response to changes in blockage.

[0032] Step 126: When the differential pressure value continuously exceeds the preset differential pressure threshold, a backflushing trigger command is generated, and the backflushing duration is dynamically calculated based on the degree to which the differential pressure value exceeds the threshold. To prevent false triggering due to instantaneous pressure fluctuations, the system requires ΔP to continuously exceed the threshold for a preset time (e.g., 3-10 seconds) before it is confirmed as a true blockage; once confirmed, a high-priority backflushing command is generated, and the flushing duration is dynamically matched according to the extent of the exceedance, achieving "on-demand flushing and precise control".

[0033] According to the intelligent control method for a hydraulic support backwash filter of the present invention, in manual mode, the generation of the backwash trigger command includes: Step 127: Receive a manual backwashing request from the operator for the adjacent hydraulic support. The operator can select the adjacent support on the left or right (i.e., "adjacent support") through the human-machine interface of this frame controller and click the "Manual Backwashing" button to initiate the request; the request is encapsulated as an instruction packet with the target address and submitted to the central collaborative decision-making module for unified safety verification.

[0034] Step 128: Manual backflushing requests for the hydraulic support where the operator is located are prohibited. Specifically, the system forcibly blocks the manual backflushing operation entry for this support at the software logic level. Even if the operator accidentally touches the relevant button, the controller will not respond. This design stems from the space-constrained manual control rules for downhole operation safety: because backflushing causes a momentary interruption of the fluid supply to this support and loss of pressure in the actuators, if triggered during the operation of this support, it can easily lead to unexpected descent of the support or loss of control, endangering the safety of the operators. Therefore, the system mandates that the target of manual backflushing must be an "adjacent support," and the request must still pass dual safety verification of personnel positioning and equipment operating conditions before it can be executed, fundamentally eliminating the safety risks caused by human error during the operation of this support.

[0035] According to the intelligent control method for hydraulic support backwashing filters of the present invention, in the above embodiments, the preferred safe operating period is when the coal mining machine is operating in the initial or final triangular coal working area of ​​the working face. Specifically, a fully mechanized mining face is usually divided into a central main coal cutting area and two triangular coal cutting areas at both ends. The main coal cutting area is the core operating section where the coal mining machine operates at high speed and the hydraulic supports frequently perform automated actions (such as lowering the support column, moving the support column, and raising the support column). The system has high requirements for the continuity and stability of the emulsion supply. When the coal mining machine moves to the two ends of the working face to perform oblique cutting and clearing the triangular coal, its travel speed is significantly reduced, and the hydraulic supports in the adjacent area are mostly in a relatively static or low-frequency operation state. At this time, the sensitivity to the interruption of the fluid supply is greatly reduced. Therefore, limiting the safe operating period to the window period when the coal mining machine is in the initial or final triangular coal cutting area can effectively avoid the high-dynamic and high-risk main coal cutting stage, and can also take advantage of the lower system load and less personnel activity during this period to provide sufficient safety redundancy for backwashing operations. Meanwhile, this strategy aligns with the automated collaborative control logic of the working face, eliminating the need for additional shutdowns or interventions in the production process. It enables intelligent maintenance without affecting normal coal cutting, significantly improving the inherent safety level and operational efficiency of the system.

[0036] According to the intelligent control method for a hydraulic support backwash filter of the present invention, when multiple backwash trigger commands of different modes are received simultaneously, the method further includes arbitrating the multiple backwash trigger commands and determining a backwash trigger command to be executed according to a preset priority rule. In actual operation, due to the possible overlap of timing cycles, filter element differential pressure exceeding limits, and operator manual requests, the system may receive multiple valid backwash trigger commands from different control modes at the same time or within a very short period. To avoid command conflicts, resource competition, or duplicate execution, the central collaborative decision controller preferably activates the command arbitration mechanism: first, all pending commands are included in a unified queue; then, they are sorted and filtered according to preset priority rules, retaining only the command with the highest priority for subsequent safety verification and execution processes; the remaining commands are automatically discarded or merged (multiple requests for the same target support can be considered as one), thereby ensuring clear control logic, unique actions, and system stability.

[0037] Furthermore, according to the intelligent control method for a hydraulic support backwash filter of the present invention, the preset priority rule is preferably: the priority of differential pressure mode triggering command is higher than that of manual mode triggering command, and the priority of manual mode triggering command is higher than that of timed mode triggering command. This priority setting is based on a comprehensive balance between fault risk and operational intent. Among them, differential pressure mode directly reflects the physical blockage state of the filter element and belongs to the objective needs of system self-sensing. If it does not respond in time, it may lead to filter failure, valve assembly jamming, or even the spread of emulsion contamination. Therefore, it is given the highest priority. Manual mode reflects the subjective intervention of operators based on on-site experience. Although it has flexibility, it relies on human judgment, so it is second. Timed mode is only a periodic routine check and lacks the ability to respond to real-time operating conditions. It is the least important of the three. Through this hierarchical strategy, the system can prioritize the safety and functional integrity of equipment in multi-source concurrent scenarios, while taking into account the rationality of manual intervention and the efficiency of automated scheduling, so as to achieve the goal of safe and orderly intelligent control.

[0038] According to the intelligent control method for the backwash filter of the hydraulic support of the present invention, before controlling the backwash filter of the target hydraulic support to perform the backwash operation, it is preferable to further include sending a backwash operation prompt message to the monitoring center. Specifically, after the central controller completes the safety verification and confirms that the backwash action is about to be performed, it can actively push a structured prompt message to the upper-level monitoring system at the ground or the roadway control center through the working face communication network (such as CAN bus, industrial Ethernet or 5G private network). The content may include: target support number, trigger mode (timed / differential pressure / manual), current differential pressure value, planned backwash duration, safety verification result and expected execution time window, etc. This prompt message is used to display the "backwashing in progress" status in real time on the monitoring interface, so that the dispatcher can keep track of the equipment maintenance dynamics; on the other hand, it can be archived as an event log to provide data support for subsequent fault tracing, energy efficiency analysis and predictive maintenance.

[0039] Furthermore, according to the intelligent control method for backwashing filters of hydraulic supports of the present invention, the aforementioned active operating states preferably include at least one of column raising, column lowering, and support shifting. Column raising, column lowering, and support shifting are the three most critical and frequent active hydraulic actions of hydraulic supports during automated or manual intervention processes, corresponding to column extension / retraction to support / release the top plate, and the overall movement of the base along the scraper conveyor direction, respectively. These actions all rely on a stable and continuous emulsion supply to drive the column or push the jacks. However, the backwashing operation briefly cuts off the main fluid supply path (by switching the flow path via a pilot valve), causing instantaneous pressure loss in the actuators. If backwashing is initiated during such actions, it can easily lead to support operation interruption, attitude instability, or even top plate support failure. Therefore, this embodiment of the present invention defines these three high-risk actions as "active operating states" and treats them as critical prohibition conditions in the safety verification process. If the target support is detected to be in any of these states, it is deemed unsafe, thereby effectively avoiding safety accidents caused by the superposition of fluid supply interruption and action conflict.

[0040] The intelligent control method for hydraulic support backwashing filters according to a preferred embodiment of the present invention achieves refined, intelligent, and inherently safe management of the backwashing process by constructing a central collaborative control architecture. Specifically, the system integrates real-time information such as system clock, filter element differential pressure (ΔP), personnel positioning, support operation status, and operator commands under a unified decision-making framework, and deeply couples and enhances the safety of three triggering modes: timing, differential pressure, and manual, forming the following control logic: Adaptive timing control logic: Although the system presets a baseline backwashing cycle, it does not execute it blindly. The controller first determines whether the current operation is within a safe period when the coal mining machine is located in the triangular coal zone at the beginning or end of the working face, and confirms that the emulsion system pressure is stable; only within this macroscopic safety window is the timing trigger allowed to enter the next stage. Subsequently, the system reads the current filter element pressure difference ΔPx: if ΔPx is lower than the preset threshold ΔPth, the filter element is determined to be clean, the current flushing is automatically canceled, and the next cycle is appropriately extended; if ΔPx ≥ ΔPth, the optimal backwashing duration t1 is dynamically calculated based on the degree of exceeding the limit (ΔPx - ΔPth) using a preset function f, such as t1 = f(ΔP - ΔPth), to achieve on-demand flushing and avoid ineffective operations and resource waste.

[0041] Enhanced safety differential pressure control logic: When the differential pressure sensor continuously detects that ΔPx exceeds the threshold and remains so for a preset time, the system generates a high-priority differential pressure trigger command, but immediately enters a mandatory safety verification process: It simultaneously determines whether there are personnel in the target support and its adjacent area (e.g., within ±2 supports), and whether the support is in an active operation state such as raising, lowering, or moving the support. If any safety condition is not met, the command is suspended and a "rinsing delay" alarm is reported, continuously polling until the condition is restored; after verification, the rinsing duration t2 is dynamically determined based on the ΔPx exceedance, ensuring both cleaning effect and efficiency.

[0042] Controlled adjacent rack manual operation logic: For scenarios requiring manual intervention, the system's underlying logic forcibly prohibits operators from initiating manual backwashing requests to their own rack, eliminating the risk of operational loss of control due to rack depressurization. Operators can only submit manual requests to adjacent racks on their left or right, and these requests must still be verified before execution, achieving dual safety guarantees of spatial isolation and system verification.

[0043] All backwash trigger commands from all sources (adaptive timing, differential pressure, and authorized manual) are aggregated into the central controller for unified arbitration, with priority set as follows: differential pressure mode > manual mode > timing mode. The winning command undergoes a comprehensive safety and environmental status check before final issuance. During execution, the electromagnetic pilot valve precisely controls the backwash valve opening time based on the dynamic duration parameter (t1 or t2) carried by the command, and pushes a prompt message to the monitoring center before the action begins, including the bracket number, trigger mode, differential pressure data, and estimated duration, achieving full-process observability, controllability, and traceability.

[0044] This invention also provides an electronic device, which is described below. The electronic device described below can be referred to in conjunction with the intelligent control method for the hydraulic support backwash filter described above. Specifically, the electronic device can be a main controller of the hydraulic support electro-hydraulic control system, a centralized control terminal for the fully mechanized mining face, a dedicated intelligent backwash drive module, or an edge computing gateway, etc.

[0045] The electronic device may include a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the intelligent control method for the hydraulic support backwash filter described in the above embodiments. Specifically, the processor collects multi-source data in real time from the coal mining machine positioning system, pressure sensors, personnel positioning base stations, and support controllers, loads and runs control programs containing the control methods mentioned above in the memory, thereby supporting the complete closed-loop execution of the aforementioned intelligent control methods at the hardware level. For example, when a differential pressure exceeding the limit is detected and the coal mining machine is in a triangular coal zone, the processor autonomously decides whether to start backwashing based on preset priorities and safety rules, and accurately outputs a solenoid valve drive signal of the corresponding duration. At the same time, it reports the operation status to the monitoring center through the communication interface, realizing coordinated linkage between control and monitoring.

[0046] Furthermore, the logical instructions in the aforementioned memory can be implemented as software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for intelligent control of a hydraulic support backwash filter, characterized in that, include: Obtain the position information of the coal mining machine on the working face, and determine whether the current operation is within a safe period for backwashing based on the position information; During the safe operating period, receive at least one backwash trigger command from timed mode, differential pressure mode or manual mode; A safety check is performed on any of the received backwash trigger commands. The safety check includes: detecting whether there are personnel in the target hydraulic support and its preset adjacent area, and detecting whether the target hydraulic support is in an active state. If the safety check passes, the backwash duration is dynamically determined according to the type of the backwash trigger command, and the backwash filter of the target hydraulic support is controlled to perform a backwash operation; if the safety check fails, the backwash trigger command is suspended and the system waits until the safety conditions are met.

2. The intelligent control method for hydraulic support backwashing filter according to claim 1, characterized in that, In the timed mode, the generation of the backwash trigger command includes: Based on whether the preset baseline period has been reached by monitoring the system clock; When the reference cycle is reached, the current differential pressure value of the backwash filter of the target hydraulic support is detected; If the current differential pressure value is less than the preset differential pressure threshold, the current timed backflushing is cancelled and the next reference cycle is extended. If the current differential pressure value is greater than or equal to the differential pressure threshold, the backwash trigger command is generated, and the duration of this backwash is dynamically calculated based on the difference between the current differential pressure value and the differential pressure threshold.

3. The intelligent control method for hydraulic support backwashing filter according to claim 1, characterized in that, In the differential pressure mode, the generation of the backwash trigger command includes: Real-time monitoring of the differential pressure value of the backwash filter of the target hydraulic support; When the differential pressure value continuously exceeds the preset differential pressure threshold, the backwash trigger command is generated, and the duration of this backwash is dynamically calculated based on the degree to which the differential pressure value exceeds the differential pressure threshold.

4. The intelligent control method for hydraulic support backwashing filter according to claim 1, characterized in that, In the manual mode, the generation of the backwash trigger command includes: Receive manual backwashing requests from operators for adjacent hydraulic supports; Manual backflushing requests for the hydraulic support of the unit where the operator is located are prohibited from being received.

5. The intelligent control method for hydraulic support backwashing filter according to claim 1, characterized in that, The safe operating period refers to the time during which the coal mining machine operates in the initial or final triangular coal working area of ​​the working face.

6. The intelligent control method for hydraulic support backwashing filter according to claim 1, characterized in that, When multiple backwash trigger commands of different modes are received simultaneously, the method also includes arbitrating the multiple backwash trigger commands and determining a backwash trigger command to be executed according to a preset priority rule.

7. The intelligent control method for the hydraulic support backwash filter according to claim 6, characterized in that, The preset priority rule is as follows: the priority of differential pressure mode trigger command is higher than that of manual mode trigger command, and the priority of manual mode trigger command is higher than that of timed mode trigger command.

8. The intelligent control method for hydraulic support backwashing filter according to any one of claims 1 to 7, characterized in that, Before controlling the backwash filter of the target hydraulic support to perform backwashing operation, the system also includes sending backwashing operation prompt information to the monitoring center.

9. The intelligent control method for hydraulic support backwashing filter according to any one of claims 1 to 7, characterized in that, The active operating states include at least one of raising the column, lowering the column, and moving the frame.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that, When the processor executes the computer program, it implements the intelligent control method for the hydraulic support backwash filter as described in any one of claims 1 to 9.

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