A timing control method for multi-layer filter screen partition cleaning

Abstract

The present application relates to the technical field of cleaning equipment control, and particularly relates to a time sequence control method for multi-layer filter screen partition cleaning, comprising the following steps: generating a basic cleaning time sequence composed of walking period, air jet period, water jet period and rest period according to the layer position sequence of each cleaning partition in the multi-layer filter screen and the walking direction of the moving cleaning platform; identifying the time sequence transfer position between adjacent cleaning partitions as an interference transfer point, and inserting a blocking time sequence at the interference transfer point to generate a partition composite cleaning time sequence; the blocking time sequence is used to make the next cleaning partition delay entering the water jet period and execute air jet isolation or rest dispersion first after the air jet or water jet of the current cleaning partition ends; and the multiple moving cleaning platforms are controlled to operate in partitions according to the partition composite cleaning time sequence. The present application avoids the problem of pollutant migration to adjacent partitions caused by the next cleaning partition immediately entering water jet operation after the air jet or water jet of the current cleaning partition ends.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment control technology, and in particular to a timing control method for multi-layer filter screen partition cleaning. Background Technology

[0002] Compressor inlet housings are typically equipped with protective mesh or filters to prevent snow, willow catkins, dust, and other foreign matter from entering the intake system. In actual operation, snow easily adheres to and compacts on the surface of the inlet housing's protective mesh in low winter temperatures. In spring, willow catkins easily adhere to the filter pores under negative pressure adsorption, humidity changes, and electrostatic effects, gradually forming localized blockages. These blockages increase the intake differential pressure, reduce compressor intake efficiency, shorten filter lifespan, and in severe cases, affect the safe and stable operation of the equipment.

[0003] Existing cleaning methods mostly employ manual rinsing, manual blowing, or simple timed automatic cleaning. Manual cleaning suffers from high labor intensity, water and time consumption, high safety risks, untimely cleaning, and easy damage to the filter screen. While simple timed automatic cleaning can reduce manual intervention, it typically only controls the movement of the mobile platform, air jets, or water jets according to a fixed sequence, lacking comprehensive temporal coordination of multi-layer filter screens, adjacent zones, corresponding areas between upper and lower layers, and the pressure recovery status of water and air supply branches. For multi-layer filter screen cleaning devices, multiple mobile cleaning platforms are usually distributed in different layers or different side areas, and are supplied with air and water to the nozzles through the same air supply branch or the same water supply branch. When multiple platforms simultaneously spray air or water at similar times, it can easily cause branch pressure fluctuations, reducing the air jet stripping capacity or water jet flushing capacity. When the current cleaning zone has just finished spraying air or water, and the next adjacent cleaning zone immediately begins spraying water, secondary adhesion or contamination of adjacent areas may occur due to water mist not being dispersed, willow catkins not being detached, or snow and mud not being settled.

[0004] Furthermore, in multi-layer filter structures, snow, willow catkins, and water mist shed during the cleaning process of the upper filter may migrate to the lower layers. If the corresponding cleaning zone in the lower layer completes cleaning before the upper layer, or if the cleaning sequence of corresponding zones in the upper and lower layers is too close, residues from the upper layer can easily fall back into the already cleaned areas of the lower layer, leading to re-contamination and reducing the overall cleaning effect. Existing control methods typically focus on the execution of actions on a single platform, lacking a unified timing design for layer sequence, travel direction, transitions between adjacent zones, and blocking / waiting processes. Summary of the Invention

[0005] This invention provides a timing control method for multi-layer filter screen partition cleaning. Based on the generation of a basic cleaning timing sequence, it identifies the interference junction positions between adjacent partitions and achieves same-branch injection avoidance, progressive cleaning between upper and lower layers, and suppression of contamination migration between adjacent partitions by inserting blocking timing sequences, generating partition composite cleaning timing sequences and platform action time schedules. This improves the stability, timeliness, and cleaning efficiency of automatic cleaning of the compressor intake shroud guard.

[0006] A timing control method for multi-layer filter screen partition cleaning includes the following steps: S1. Based on the layer order of each cleaning zone in the multi-layer filter and the walking direction of the mobile cleaning platform, a basic cleaning sequence consisting of walking period, air jet period, water spray period and rest period is generated. S2. In the basic cleaning sequence, the timing transition position between adjacent cleaning zones is identified as an interference transition point, and a blocking sequence is inserted at the interference transition point to generate a partition composite cleaning sequence; the blocking sequence is used to delay the entry of the next cleaning zone into the water spraying period after the current cleaning zone finishes its air jet or water spraying, and first perform air jet isolation or paused discharge. S3. Control the operation of multiple mobile cleaning platforms in the partitioned composite cleaning sequence, so that the mobile cleaning platforms on the same air supply branch or the same water supply branch avoid synchronous spraying, and the corresponding cleaning partitions of the upper and lower layers complete the cleaning in the order of upper layer first and lower layer last.

[0007] Optionally, the generation of the basic cleaning sequence includes determining a basic cycle period based on the total number of cleaning zones for each filter layer and the number of mobile cleaning platforms. The basic cycle period includes a walking period, an air jet period, a water spray period, and a rest period.

[0008] Optionally, the basic cycle includes a first half and a second half, corresponding to jet spraying and water spraying operations, respectively.

[0009] Optionally, based on the layer order and the walking direction, the walking period, air jet period, rest period and water spray period of each cleaning zone corresponding to the upper filter are sequentially mapped to the first half and second half of the basic cycle. The cleaning zones corresponding to each time period of the lower filter are offset relative to the upper layer by a preset offset, resulting in a basic cleaning sequence formed by the interweaving of each cleaning zone in time sequence.

[0010] Optionally, in the basic cleaning sequence, for each adjacent cleaning zone's time sequence handover position, the time interval between the end time of the current cleaning zone's air jet or water spraying period and the start time of the next cleaning zone's originally scheduled water spraying period is obtained.

[0011] Optionally, S2 further includes setting a safety interval threshold, whereby when the time interval is less than the safety interval threshold, the corresponding timing handover position is marked as an interference handover point; the safety interval threshold is set according to the pressure recovery characteristics of the gas supply branch or water supply branch.

[0012] Optionally, based on the interference junction point, starting from the end time of the jet or water spray of the current cleaning zone, a blocking sequence is inserted. This blocking sequence includes a jet isolation period executed first and / or a pause and discharge period executed later. The start time of the water spray period of the next cleaning zone is delayed until after the end of the blocking sequence, thus obtaining the composite cleaning sequence of the zones.

[0013] Optionally, S3 includes generating a corresponding action schedule for each mobile cleaning platform. The action schedule defines the walking period, air jetting period, water spraying period, and rest period of the mobile cleaning platform in each cleaning zone, and the action schedule is generated according to the composite cleaning sequence of the zones.

[0014] Optionally, the partitioned composite cleaning sequence is constructed by combining the layer sequence, the walking direction and the insertion of the blocking sequence, so that there is no time overlap between the air jet period and the water spray period of any two mobile cleaning platforms on the same air supply branch or the same water supply branch, so that synchronous spraying is automatically avoided when controlled according to the action schedule.

[0015] Optionally, in the partitioned composite cleaning sequence, the air jetting and water spraying periods of each cleaning partition of the upper filter screen are arranged before the air jetting and water spraying periods of its corresponding lower filter screen cleaning partition, so that when the operation is executed sequentially according to the action schedule, the corresponding cleaning partitions of the upper and lower layers are cleaned in the order of upper layer first and lower layer last.

[0016] The beneficial effects of this invention are: This invention transforms the cleaning process of multi-layer filters from a traditional fixed-sequence cleaning to a zoned sequential cleaning with handover identification and dynamic blocking capabilities through a progressive timing control method consisting of a basic cleaning sequence, a blocking sequence, and a zoned composite cleaning sequence. The invention first generates a basic cleaning sequence based on the layer order, travel direction, number of cleaning zones, and number of mobile cleaning platforms. Then, it determines whether there is insufficient safety interval at the time-sequence handover points between adjacent cleaning zones and inserts air jet isolation periods and / or pause dissipation periods only at points identified as interference handover points. This avoids problems such as water mist crosstalk, willow catkin condensation, snow sludge re-adhesion, and pollutant migration to adjacent zones caused by the next cleaning zone immediately entering water spraying operation after the current cleaning zone finishes air jetting or water spraying. Simultaneously, it avoids uniformly increasing the waiting time for all zones, thus ensuring cleaning stability while reducing unnecessary cleaning cycle extensions.

[0017] This invention combines a safety interval threshold with the pressure recovery characteristics of the air supply branch or water supply branch, giving the insertion of the blocking sequence a clear basis for equipment operation, rather than relying on empirical fixed delays. By comparing the time interval between the end time of the current cleaning zone's air jet or water jet period and the start time of the next cleaning zone's originally scheduled water jet period, and combining this with the pressure recovery time of the air supply branch and water supply branch, it determines whether an interference handover point has been formed. This allows the next cleaning zone to be actively delayed before the spray medium pressure has recovered and the disturbance in the previous zone has dissipated. This method can reduce instantaneous pressure fluctuations during multi-platform and multi-branch operation, avoid reduced air jet isolation effect, insufficient water jet rinsing distance, or uneven spray coverage due to insufficient recovery of the same air supply branch or water supply branch, improve the removal efficiency of catkins, snow, and dust on the filter surface, and reduce the risk of damage to nozzles, pipelines, and filters due to frequent pressure shocks.

[0018] This invention generates an action schedule for each mobile cleaning platform through a partitioned composite cleaning sequence. This ensures that the walking, air spraying, water spraying, stopping, air spray isolation, and stopping to disperse actions of each mobile cleaning platform are uniformly arranged before execution. This achieves spray avoidance within the same branch and progressive cleaning between upper and lower layers. Because the partitioned composite cleaning sequence combines the layer order, walking direction, and the result of blocking sequence insertion, any two mobile cleaning platforms on the same air supply branch or the same water supply branch can avoid synchronous spraying. The upper filter corresponding to the cleaning zone can also complete air spraying and water spraying before the lower filter corresponding to the cleaning zone. This control method can reduce the secondary adhesion of upper layer contaminants to the lower layer already cleaned areas, avoid water and air resource competition caused by multiple platforms operating simultaneously, and allow the control system to complete automatic cleaning simply by outputting control signals for the motor, air spray valve, and water spray valve according to the action schedule. This improves the operational reliability of the cleaning device, the simplicity of on-site control, and the long-term cleaning and maintenance efficiency of the compressor inlet shroud. Attached Figure Description

[0019] 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 only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the execution logic of the control method according to an embodiment of the present invention. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. For some well-known technologies, those skilled in the art may also use other alternative methods to implement the invention. Moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0022] like Figure 1 As shown, a timing control method for multi-layer filter partition cleaning includes the following steps: S1. Based on the layer order of each cleaning zone in the multi-layer filter and the walking direction of the mobile cleaning platform, a basic cleaning sequence consisting of walking period, air jet period, water spray period and rest period is generated.

[0023] In this embodiment, step S1 is used to generate a basic cleaning sequence that can be used by multiple layers of filters and multiple mobile cleaning platforms before executing the blocking timing insertion. The basic cleaning sequence does not simply make each mobile cleaning platform complete air jetting, water spraying and moving in sequence, but arranges the air jetting and water spraying operations in different half-zones of the basic cycle, and makes the cleaning zones of different layers staggered in time, thereby reducing the superposition of air and water supply loads at the same time, and the interference of upper cleaning residues on the lower cleaning process.

[0024] S11. Determine the total number of cleaning zones and the number of mobile cleaning platforms.

[0025] Obtain the total number of cleaning zones corresponding to each layer of the multi-layer filter, and obtain the number of mobile cleaning platforms participating in the same basic cleaning sequence control.

[0026] For the l-th filter layer, the total number of its cleaning zones is denoted as: ; This indicates the number of cleaning zones obtained by dividing the l-th filter layer along the direction of travel of the mobile cleaning platform; l represents the filter layer number, which is numbered sequentially from top to bottom.

[0027] The number of mobile cleaning platforms participating in the same basic cleaning sequence control is denoted as: ; This indicates the number of mobile cleaning platforms participating in the cleaning action choreography within the same control cycle.

[0028] When the total number of cleaning zones in different filter layers is inconsistent, the largest total number of cleaning zones in each filter layer is used as the basis for the zone arrangement of the basic cycle, that is: ; This represents the total number of baseline cleaning partitions used to generate the basic cycle.

[0029] With the above settings, filters with shorter layers or fewer partitions can still be embedded in the same basic cycle without having to create an independent cycle for each layer, thus avoiding cross-conflicts between multiple cleaning sequences.

[0030] S12. Determine the basic cycle period.

[0031] The basic cycle time is determined based on the total number of baseline cleaning zones N and the number of mobile cleaning platforms M. The basic cycle time covers the walking period, the air jetting period, the water spraying period, and the rest period.

[0032] The basic cycle period is expressed as: ; Indicates the basic cycle period; This indicates the number of partition batches that need to be orchestrated within a single basic cycle. This indicates the travel time required for the mobile cleaning platform to move from one cleaning zone to an adjacent cleaning zone; This indicates the jetting time required to perform a jetting operation on a cleaning zone; This indicates the break time set between air jet operations and water jet operations; This indicates the duration of water spraying required to perform a water spraying operation on a cleaning zone.

[0033] The number of batches K in each partition is determined as follows: ;⌈⌉ indicates rounding up.

[0034] When the number of mobile cleaning platforms is less than the number of cleaning zones, multiple cleaning zones are included in the basic cycle in batches; when the number of mobile cleaning platforms can cover more cleaning zones, the number of cycles is reduced by dividing the zones into batches, thereby improving the overall cleaning efficiency.

[0035] When choosing specific values, The speed is determined based on the rated travel speed of the mobile cleaning platform and the center distance between adjacent cleaning zones; The determination is based on the number of jet nozzles, the time required for the gas source pressure to stabilize, and the shortest action time required for the removal of snow or willow catkins. Determined based on the attenuation of water mist disturbance after jet injection and the switching response time of pipeline valves; The determination is based on the number of water nozzles, the time of water pressure stabilization, and the time of filter screen surface rinsing and coverage.

[0036] S13. Divide the basic cycle into the first half and the second half.

[0037] Basic cycle period The area is divided into a front half and a back half according to the type of working medium. The front half is used to schedule air jet operations, and the back half is used to schedule water jet operations.

[0038] The first half of the zone is represented as: ; This represents the first half of the basic cycle, used to schedule the walking period, the jetting period, and the resting period after jetting.

[0039] The second half of the zone is represented as: ; This indicates the second half of the basic cycle, used to schedule the water spraying time for the cleaning zones corresponding to the first half, as well as the necessary walking or resting time before and after water spraying.

[0040] By separating air jetting and water spraying operations into different halves of the basic cycle, the system avoids switching directly from air jetting to water spraying in the same cleaning zone within a short period. It also prevents multiple mobile cleaning platforms from simultaneously occupying air and water supply lines. Especially in winter snow-covered conditions, the air jetting in the first half breaks up the adhesion between the snow and the filter, while the water spraying in the second half washes away any remaining snow. In spring willow catkin conditions, the air jetting in the first half loosens the catkins, while the water spraying in the second half peels them off, reducing the probability of the catkins forming clumps upon direct contact with water.

[0041] S14. Map each cleaning zone of the upper filter to the basic cycle.

[0042] Based on the layer order and the direction of travel of the mobile cleaning platform, the travel time, air jet time, rest time and water spray time of each cleaning zone corresponding to the upper filter screen are sequentially mapped to the first half and the second half of the basic cycle.

[0043] For the i-th cleaning zone in the upper filter, the starting time of its first half is represented as: ; This indicates the starting time of the i-th cleaning zone in the upper filter screen within the first half of the screen; i represents the cleaning zone number arranged along the direction of travel of the moving cleaning platform. This indicates the partition batch to which the i-th cleaning partition belongs.

[0044] Partition Batch Determine as follows: ; This characterizes which batch of execution the i-th cleaning partition is scheduled for within the basic cycle.

[0045] The walking period, jetting period, and resting period of the i-th cleaning zone are as follows: ; This represents the walking time period corresponding to the i-th cleaning zone.

[0046] ; This represents the jetting period corresponding to the i-th cleaning zone.

[0047] ; This represents the pause period corresponding to the i-th cleaning partition.

[0048] The water spraying period of the i-th cleaning zone is mapped to the latter half of the basic cycle, and its starting time is represented as: ; This indicates the start time of water spraying in the i-th cleaning zone in the second half of the zone.

[0049] The water spraying time period for the i-th cleaning zone is: ; This indicates the water spraying time period corresponding to the i-th cleaning zone.

[0050] Therefore, the basic time period unit of the i-th cleaning zone in the upper filter can be represented as: ; This represents the basic time period unit of the i-th cleaning partition.

[0051] This mapping method ensures that the same cleaning zone first undergoes walking and positioning, then air jetting, then a pause, and finally water spraying. The air jetting and water spraying are naturally spaced apart by the first and second halves of the basic cycle, preventing water spraying before the air jetting disturbance has subsided, which could cause water mist recirculation, wet willow catkins, or snow mud splashing.

[0052] S15. Offset the lower filter from the upper filter by a preset offset for each time period.

[0053] After obtaining the basic time period units of each cleaning zone of the upper filter, the walking time period, air jet time period, rest time period and water spray time period of the corresponding cleaning zone in the lower filter are offset by a preset amount relative to the upper filter.

[0054] For the i-th cleaning zone in the l-th filter layer, its timing offset is expressed as: ; δ represents the timing offset of the l-th filter layer relative to the upper reference filter layer; δ represents the preset offset between two adjacent filter layers.

[0055] The preset offset δ is determined as follows: δ is the sum of the jetting period and the rest period, so that the cleaning zone of the lower filter screen at the same position will not start water spraying before the jetting disturbance of the upper layer has stopped.

[0056] For the i-th cleaning zone in the l-th filter layer, its walking period, air jet period, rest period, and water spray period are as follows: ; This represents the travel time period corresponding to the i-th cleaning zone in the l-th filter layer.

[0057] ; This represents the jetting time period corresponding to the i-th cleaning zone in the l-th filter layer.

[0058] ; This represents the pause period corresponding to the i-th cleaning zone in the l-th filter layer.

[0059] ; This indicates the water spraying period corresponding to the i-th cleaning zone in the l-th filter layer.

[0060] When the end time of any of the above time periods exceeds the basic cycle period If this time period is delayed, it will be carried over to the next basic cycle to maintain the continuity of the timing and avoid the truncation of the cycle tail due to the superposition of offsets in multiple timing layers.

[0061] By setting a preset offset δ, the lower filter will not spray water simultaneously with the upper filter at the same corresponding position, nor will it immediately begin spraying water when the upper filter has just completed its air jet disturbance. This reduces the interference of snow particles, willow catkins, and water mist blown off from the upper layer on the rinsing direction of the lower layer, making the cleaning process exhibit a top-down, staggered, and progressive temporal characteristic.

[0062] S16. Generate a basic cleaning sequence that is interwoven from each cleaning partition in a time sequence.

[0063] Arrange the walking period, air jet period, rest period, and water spray period corresponding to each filter layer and each cleaning zone in chronological order to obtain the basic cleaning sequence.

[0064] The basic cleaning sequence is represented as follows: ; This indicates the basic cleaning sequence, which is formed by the interweaving of cleaning zones of multiple filter layers in a specific time sequence.

[0065] Basic cleaning sequence Within the same cleaning zone, the time sequence remains the same: walking period, air jetting period, rest period, and water spraying period. Different cleaning zones are interleaved based on zone batches, the number of mobile cleaning platforms, and inter-layer offset. The control system operates according to the basic cleaning sequence. Output the corresponding mobile platform travel control signal, jet valve opening / closing signal, water spray valve opening / closing signal, and pause hold signal.

[0066] Compared to conventional timed cleaning control methods, this embodiment does not allow each mobile cleaning platform to cycle independently along a fixed route. Instead, it first constructs a unified basic cycle, then divides the basic cycle into the first half of the corresponding air jet operation and the second half of the corresponding water spray operation, and further uses a preset offset between layers to make the cleaning action of the lower filter screen staggered relative to the upper filter screen.

[0067] This embodiment separates the air jetting and water spraying operations in time, reducing valve impact and pressure fluctuations caused by simultaneous air-water switching; it allows the upper filter screen to complete disturbance and initial peeling first, while the lower filter screen performs the corresponding action later, reducing secondary adhesion caused by pollutants migrating downwards; it enables multiple mobile cleaning platforms to operate in batches and zones within the same basic cycle, improving the overall cleaning efficiency of multi-layer filters; and it provides a unified timing basis for subsequent insertion of blocking sequences at interference junctions, allowing subsequent composite cleaning sequences to be further expanded based on clearly defined walking, air jetting, water spraying, and rest periods.

[0068] S2. In the basic cleaning sequence, the timing transition position between adjacent cleaning zones is identified as an interference transition point, and a blocking sequence is inserted at the interference transition point to generate a partition composite cleaning sequence; the blocking sequence is used to delay the entry of the next cleaning zone into the water spraying period after the current cleaning zone finishes its air jet or water spraying, and first perform air jet isolation or paused discharge.

[0069] In this embodiment, step S2 is used to further identify the timing transition positions between adjacent cleaning zones that may be due to insufficient water vapor pressure recovery, water mist crosstalk, wet condensation of willow catkins, or snow re-sticking, based on the basic cleaning timing sequence obtained in step S1, and to insert a blocking timing sequence at the timing transition position to generate a zone composite cleaning timing sequence.

[0070] S21. Determine the timing handover position between adjacent cleaning zones.

[0071] In the basic cleaning sequence, the timing handover position between the current cleaning partition and the next cleaning partition is determined according to the adjacency and timing order of the cleaning partitions: ; This represents the set of temporal transition points between adjacent cleaning zones; Indicates the currently cleaned partition; Indicates the next partition to be cleaned.

[0072] For any time period Endpoint read function is used: ; Indicates time period The beginning moment; Indicates time period The end time; Indicates the start and end points of this time period; This indicates the end point of the time period.

[0073] The endpoint read function in the control system executes as follows: when the basic cleaning sequence is stored in the form of a time period table, the control system reads the start field from the corresponding time period record as... Read the end field as .

[0074] S22. Calculate the time interval between the current cleaning partition and the next cleaning partition.

[0075] For each time sequence handover position From the current air jet or water jetting period of the cleaning zone, determine the current media operation period that is adjacent to the originally scheduled water jetting period of the next cleaning zone, and record it as: ; This indicates the current media operation period corresponding to the current cleaning zone at this time sequence handover position; Indicates the jetting period of the current cleaning zone; This indicates the current water spraying time for the cleaning zone.

[0076] The end time of the current media operation period is indicated as follows: ; This indicates the end time of the current air jet or water spraying period in the cleaning zone.

[0077] The scheduled start time for the next cleaning zone's water spraying period is indicated as follows: ; This indicates the scheduled start time of the water spraying period for the next cleaning zone in the basic cleaning sequence; This indicates the scheduled water spraying time for the next cleaning zone.

[0078] The time interval between the current cleaning partition and the next cleaning partition is expressed as: ; This indicates the time interval between the end time of the current media operation in the current cleaning zone and the start time of the scheduled water spraying period in the next cleaning zone.

[0079] S23. Set the safety interval threshold.

[0080] The safety interval threshold is set based on the pressure recovery characteristics of the gas supply branch or water supply branch. For branch type λ, the pressure recovery time is expressed as: ; Indicates branch type Stress recovery time; Indicates the branch type, take The time indicates the gas supply branch, take The time indicates the water supply branch; This indicates the pressure recovery time measured during on-site commissioning; This indicates the initial preset pressure recovery time.

[0081] The pressure recovery time measured during on-site commissioning is determined as follows: ; This indicates the time after the corresponding branch valve has completed the opening / closing switch; This indicates the moment when the pressure in the corresponding branch recovers and remains stable.

[0082] The criterion for maintaining stable pressure is: ; This indicates the set working pressure of the corresponding branch; Indicates the corresponding branch at time [time]. The actual pressure.

[0083] The values ​​of 0.95 and 1.05 above correspond to a pressure fluctuation range of ±5%, which is set based on the allowable pressure fluctuation in the branch when the nozzle forms an effective air curtain or stable water jet. During on-site commissioning, if the pressure is continuously maintained within this range for no less than 3 seconds, the pressure recovery is considered complete. The 3 seconds is set based on the solenoid valve action delay, the attenuation of pipeline pressure fluctuations, and the sampling stability of the control system.

[0084] The initial preset pressure recovery time value is: ; when At that time, 5 seconds are used for the initial pressure recovery of the gas supply branch; when At that time, 8s is used for the initial pressure recovery of the water supply branch. This value is set based on the engineering characteristics that the compressed gas recovery speed of the gas supply branch is usually faster than that of the water supply branch, and the water supply branch is more affected by the water hammer caused by the opening and closing of the high-pressure hose and sprinkler head; after on-site commissioning, it is set to... and The larger of the two values ​​is taken as the actual control value.

[0085] For the timing handover position The safety interval threshold is expressed as: ; Indicates the timing handover position The corresponding safety interval threshold; Indicates the current media operation period The corresponding branch type, when Time to take ,when Time to take .

[0086] S24. Identify interference handover points.

[0087] Time interval With safety interval threshold Comparison: ; Indicates the timing handover position Interference markers; when When, the timing handover location is marked as the interference handover point; when At this time, no blocking timing sequence is inserted at the timing handover position.

[0088] S25. Insert blocking timing at the interference handover point.

[0089] when At that time, starting from the end time of the current media operation in the current cleaning partition, an interruption timing sequence is inserted: ; This indicates the blocking timing inserted at the interference junction.

[0090] The blocking sequence includes the initial jet isolation period and the subsequent pause venting period. The jet isolation duration is expressed as: ; Indicates the duration of jet isolation in the blocking sequence; This indicates the smaller of the gas supply branch pressure recovery time and the safety interval threshold.

[0091] The duration of the pause and dissipation is expressed as follows: ; This indicates the duration of pauses and dispersions within the blocking sequence.

[0092] The jet isolation period is represented as follows: ; This indicates the jet isolation period in the blocking sequence.

[0093] The pause and dissipation period is represented as follows: ; This indicates the pause and dissipation period in the blocking sequence.

[0094] when At that time, the blocking sequence only performs paused drainage; when During this time, the blocking sequence only performs jet isolation. The jet isolation period is used to form an air curtain before the next cleaning zone enters the water spraying phase, reducing the migration of water mist, willow catkins, or snow sludge generated in the previous cleaning zone to adjacent zones; The pause period is used to wait for the pressure in the gas supply branch or water supply branch to recover and to allow local disturbances to attenuate.

[0095] S26. Delay the water spraying period of the next cleaning zone and generate a composite cleaning sequence for the zone.

[0096] When the timing handover point is marked as an interference handover point, the start time of the water spraying period in the next cleaning zone is delayed until after the end of the blocking timing sequence. The delay amount is expressed as: ; This indicates the delay in the water spraying time of the next cleaning zone relative to the originally scheduled start time.

[0097] The next cleaning zone water spraying time after the delay is indicated as follows: ; This indicates the next cleaning zone water spraying time after the delay.

[0098] Following the sequence in the basic cleaning schedule, the blocking timing insertion and water spraying time delay processing are sequentially performed at all interference junctions. The original water spraying time is replaced with the delayed water spraying time, and the blocking timing is written to the corresponding junction position to obtain the partitioned composite cleaning schedule: ; Indicates the sequence of partitioned composite cleaning; This represents the set of originally scheduled water spraying periods that have been delayed or replaced. This represents the set of delayed water spraying periods; Represents the set of blocking timing sequences to be inserted; This function represents the processing function for sequential sorting based on the start time of a time period.

[0099] In the control system, the execution is as follows: first, sort the start times of each time period from smallest to largest; if the blocking sequence and the water spraying time period have the same start time, the blocking sequence is executed first, and the water spraying time period is postponed until after the blocking sequence ends; if the air jet isolation time period and the water spraying time period have the same air supply or water supply branch occupancy conflict, the blocking sequence is executed first, and the water spraying time period is executed later.

[0100] The improvement of this embodiment compared to the conventional fixed-time cleaning method is that instead of simply controlling the adjacent cleaning zones to spray water or air in a preset order, it identifies the timing handover positions between adjacent cleaning zones one by one in the basic cleaning sequence, and judges whether the handover position will cause interference based on the pressure recovery characteristics of the air supply branch or water supply branch, and then inserts the blocking timing sequence only at the position determined to be the interference handover point.

[0101] This embodiment avoids directly starting water spraying operations in the next cleaning zone before the water supply pressure has been restored, the water mist from the previous cleaning zone has been dissipated, or the airflow disturbance has subsided. This reduces problems such as insufficient water spraying pressure, wet condensation of willow catkins, sticky snow and slush, and the migration of pollutants to adjacent zones. Furthermore, since the interruption sequence is only inserted at handover points where the safety interval is insufficient, handover points without interference risk still follow the basic cleaning sequence. Therefore, it can improve cleaning stability while avoiding unnecessary overall delays.

[0102] S3. Control the operation of multiple mobile cleaning platforms in the partitioned composite cleaning sequence, so that the mobile cleaning platforms on the same air supply branch or the same water supply branch avoid synchronous spraying, and the corresponding cleaning partitions of the upper and lower layers complete the cleaning in the order of upper layer first and lower layer last.

[0103] In this embodiment, step S3 is used to convert the partitioned composite cleaning time sequence generated in step S2 into an action schedule that can be executed by each mobile cleaning platform, and to control multiple mobile cleaning platforms to perform walking, air jetting, water spraying, and stopping actions in different cleaning zones according to the action schedule. Deterministic timing allocation and execution control are performed based on the time period records in the partitioned composite cleaning time sequence.

[0104] S31. Establish the correspondence between the mobile cleaning platform and the cleaning zones.

[0105] Based on the layer order of the multi-layer filter screen, the installation location of the mobile cleaning platform, and its travel direction, determine the set of cleaning zones that each mobile cleaning platform is responsible for: ; Indicates the first A set of cleaning zones corresponding to each mobile cleaning platform; Indicates the mobile cleaning platform number; Indicates the first The first layer of filter screen Cleaning zones.

[0106] This correspondence can be written into the control box during the device commissioning phase. For horizontal cleaning devices, the mobile cleaning platform corresponds to the front filter cleaning zone covered by its horizontal track; for vertical cleaning devices, the mobile cleaning platform corresponds to the side filter cleaning zone covered by its vertical travel.

[0107] S32. Extract the platform action time period from the partitioned composite cleaning time sequence.

[0108] In the partitioned composite cleaning sequence, for the first... Each mobile cleaning platform, from its corresponding set of cleaning zones The walking period, jetting period, water spraying period, and resting period are extracted to form the platform's original set of motion periods: ; Indicates the first The original action time period set of a mobile cleaning platform; Indicating the first step in the partitioned composite cleaning sequence Layer Filter The walking time periods for each cleaning zone; Indicating the first step in the partitioned composite cleaning sequence Layer Filter The jetting time of each cleaning zone; Indicating the first step in the partitioned composite cleaning sequence Layer Filter The water spraying schedule for each cleaning zone; Indicating the first step in the partitioned composite cleaning sequence Layer Filter The cleaning zone has a break period.

[0109] If a blocking sequence is inserted between adjacent cleaning partitions in step S2, then it is related to the first... The jet isolation period and pause / dissipation period related to the mobile cleaning platform are also included in the platform's action period set: ; This represents the set of action time periods after the blocking sequence is added; Indicates the jet isolation period at the interference handover point; This indicates the period of pause and dissipation at the point of interference handover.

[0110] S33. Generate the action schedule for each mobile cleaning platform.

[0111] The action time period set after adding the blocking time sequence is sorted in ascending order of start time to generate the action time schedule of the mobile cleaning platform: ; Indicates the first Operation schedule of a mobile cleaning platform; This function represents the processing function for sequential sorting based on the start time of a time period.

[0112] Action Schedule Each record includes at least the cleaning zone number, action type, start time, end time, and execution object. Action types include walking, air jetting, water spraying, pausing, air jet isolation, and pausing venting. The control system outputs the moving platform drive signal, air jet valve opening / closing signal, water spray valve opening / closing signal, and pausing hold signal line by line according to the action schedule.

[0113] S34. Ensure that platforms on the same gas supply branch or the same water supply branch avoid synchronous injection.

[0114] In the zoned composite cleaning sequence, the jetting periods of any two mobile cleaning platforms on the same air supply branch are set to have no time overlap: ; Indicates the first gas supply branch on the same gas supply line. The corresponding jetting time period for each mobile cleaning platform; Indicates the first gas supply branch on the same gas supply line. The corresponding jetting time period for each mobile cleaning platform; and This indicates the numbers of different mobile cleaning platforms on the same gas supply branch, and .

[0115] For any two mobile cleaning platforms on the same water supply branch, their spraying periods are set to have no time overlap: ; Indicates the first on the same water supply branch The water spraying time period corresponding to each mobile cleaning platform; Indicates the first on the same water supply branch The water spraying time period corresponding to each mobile cleaning platform.

[0116] When executing the action schedule, the control system no longer needs to make additional judgments on whether to spray synchronously, but directly executes according to the action schedule. Since the zonal composite cleaning sequence has been staggered by combining the layer sequence, travel direction and blocking sequence completion time, the spraying actions on the same air supply branch or the same water supply branch naturally avoid each other in time, thereby avoiding the pressure drop in the branch caused by multiple nozzles spraying air or water at the same time.

[0117] S35. Ensure that the corresponding cleaning zones of the upper and lower layers are cleaned in the order of upper layer first and lower layer last.

[0118] In the partitioned composite cleaning sequence, for corresponding cleaning partitions in upper and lower layers, the jetting time of the upper cleaning partition is set to be earlier than the jetting time of the corresponding lower cleaning partition: ; Indicates the first Layer Filter The end time of the jetting period in each cleaning zone; Indicates the first Layer Filter The start time of the jetting period for each cleaning zone.

[0119] At the same time, the water spraying time of the upper cleaning zone is set earlier than the water spraying time of the corresponding lower cleaning zone: ; Indicates the first Layer Filter The end time of the water spraying period for each cleaning zone; Indicates the first Layer Filter The start time of the water spraying period for each cleaning zone.

[0120] Through the above-mentioned timing constraints, the snow, willow catkins, or water mist that are removed during the cleaning process of the upper filter can migrate downwards or disperse first, and then the lower filter can enter the corresponding cleaning action, thus avoiding the lower filter being contaminated by the upper residues immediately after it has been cleaned.

[0121] S36. Perform platform control according to the action schedule.

[0122] The control system follows the action schedule of each mobile cleaning platform. The control is executed sequentially. For any action record in the action schedule, the control system reads the action type of that action record and outputs the corresponding control signal.

[0123] When the action type is walking, the control system outputs a motor drive signal to move the mobile cleaning platform to the target cleaning zone; when the action type is air jetting, the control system opens the corresponding air jet valve and maintains it until the air jetting period ends; when the action type is water spraying, the control system opens the corresponding water spray valve and maintains it until the water spraying period ends; when the action type is resting, the control system keeps the mobile platform in the same position and closes the corresponding air jet valve and water spray valve.

[0124] Thus, multiple mobile cleaning platforms operate in zones according to their respective schedules, completing the automatic cleaning of multi-layer filters without synchronous spraying on the same branch.

[0125] This embodiment differs from conventional multi-platform synchronous control in that it does not operate each mobile cleaning platform independently according to a fixed cycle. Instead, it first uses a zoned composite cleaning sequence to uniformly determine the jetting, water spraying, movement, and rest periods for each platform, and then generates an action schedule for each platform. Since the zoned composite cleaning sequence has already combined the layer sequence, movement direction, and blocking sequence insertion results, the action schedule itself has control constraints for same-branch spray avoidance and progressive cleaning between upper and lower layers.

[0126] To avoid pressure fluctuations caused by multiple mobile cleaning platforms simultaneously spraying on the same air or water supply branch, the effective range of air jet isolation and water jet rinsing is ensured. Simultaneously, the upper filter's corresponding zone completes air and water spraying before the lower filter's corresponding zone, reducing secondary pollution caused by the migration of cleaning residue from top to bottom. Because the control system executes a pre-arranged action schedule, the on-site control logic is simpler, more reliable, and easier to access from local control boxes and remote control interfaces.

[0127] The control system in this invention is a local automatic control unit for managing the timing of multi-layer filter screen cleaning and for on-site execution control. It includes a control box, a programmable logic controller (PLC), a valve control module, a motor drive module, a position detection module, a pressure detection module, and a remote communication interface. The control system pre-stores basic cleaning timing, blocking timing, and zoned composite cleaning timing. Based on the action schedule corresponding to each mobile cleaning platform, it sequentially outputs platform movement control signals, jet valve opening / closing signals, water spray valve opening / closing signals, and pause / hold signals, enabling multiple mobile cleaning platforms to perform cleaning according to the set layer order, movement direction, and zone timing. Simultaneously, the control system can interlock the jetting, water spraying, and movement actions based on the pressure recovery status of the air supply and water supply branches, the platform's positioning status, and remote or local start commands. This prevents synchronous spraying on the same branch, accidental spraying before the platform is in position, and disordered cleaning sequence between upper and lower layers, ensuring the safe, stable, and automatic completion of the compressor inlet shroud cleaning process.

[0128] Below is an example of a mobile cleaning platform's action schedule. Suppose the platform is responsible for cleaning the first to third cleaning zones of the first layer filter, and a blocking sequence has been inserted according to the zone composite cleaning sequence.

[0129] Table 1 Example of an action schedule Table 1, the action schedule, is used to convert the zoned composite cleaning sequence into control commands that the mobile cleaning platform can directly execute. In the table, "Action Type" corresponds to the platform's working state at different times, including walking, air jetting, water spraying, pausing, air jet isolation, and pausing dispersion; "Start Time" and "End Time" define the execution window for each action; and "Control Signal" instructs the control system to output corresponding start and stop commands to the motor, air jet valve, and water spray valve. Items 6 and 7 are blocking sequences inserted based on interference junctions. These are used to reduce the impact of water mist, willow catkins, or snow sludge migrating to adjacent zones before the first zone finishes cleaning and begins water spraying in the second zone, through air jet isolation and pausing dispersion. Through this action schedule, the control system can drive the mobile cleaning platform to perform cleaning in chronological order, avoiding simultaneous spraying by multiple platforms on the same air or water supply branch, and ensuring that each cleaning zone completes cleaning in the set order.

[0130] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0131] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A timing control method for multi-layer filter screen partition cleaning, characterized in that, Includes the following steps: S1. Based on the layer order of each cleaning zone in the multi-layer filter and the walking direction of the mobile cleaning platform, a basic cleaning sequence consisting of walking period, air jet period, water spray period and rest period is generated. S2. In the basic cleaning sequence, the timing transition position between adjacent cleaning zones is identified as an interference transition point, and a blocking sequence is inserted at the interference transition point to generate a partition composite cleaning sequence; the blocking sequence is used to delay the entry of the next cleaning zone into the water spraying period after the current cleaning zone finishes its air jet or water spraying, and first perform air jet isolation or paused discharge. S3. Control the operation of multiple mobile cleaning platforms in the partitioned composite cleaning sequence, so that the mobile cleaning platforms on the same air supply branch or the same water supply branch avoid synchronous spraying, and the corresponding cleaning partitions of the upper and lower layers complete the cleaning in the order of upper layer first and lower layer last.

2. The timing control method for multi-layer filter screen partition cleaning according to claim 1, characterized in that, The generation of the basic cleaning sequence includes determining the basic cycle period based on the total number of cleaning zones for each filter layer and the number of mobile cleaning platforms. The basic cycle period includes a walking period, an air jet period, a water spray period, and a rest period.

3. The timing control method for multi-layer filter screen partition cleaning according to claim 2, characterized in that, The basic cycle includes a first half and a second half, corresponding to jet spraying and water spraying operations, respectively.

4. The timing control method for multi-layer filter screen partition cleaning according to claim 3, characterized in that, Based on the layer order and the walking direction, the walking period, air jet period, rest period and water spray period of each cleaning zone corresponding to the upper filter are sequentially mapped to the first half and the second half of the basic cycle. The cleaning zones corresponding to each time period of the lower filter are offset relative to the upper layer by a preset amount, so as to obtain the basic cleaning sequence formed by the interweaving of each cleaning zone in time sequence.

5. The timing control method for multi-layer filter screen partition cleaning according to claim 1, characterized in that, In the basic cleaning sequence, for each adjacent cleaning zone's timing transition position, the time interval between the end time of the current cleaning zone's air jet or water spraying period and the start time of the next cleaning zone's originally scheduled water spraying period is obtained.

6. The timing control method for multi-layer filter screen partition cleaning according to claim 5, characterized in that, The S2 further includes setting a safety interval threshold. When the time interval is less than the safety interval threshold, the corresponding timing handover position is marked as an interference handover point. The safety interval threshold is set according to the pressure recovery characteristics of the gas supply branch or water supply branch.

7. The timing control method for multi-layer filter screen partition cleaning according to claim 6, characterized in that, Based on the interference junction point, starting from the end time of the jet or water spray of the current cleaning zone, a blocking sequence is inserted. This blocking sequence includes a jet isolation period executed first and / or a pause and discharge period executed later. The start time of the water spray period of the next cleaning zone is delayed until after the end of the blocking sequence, thus obtaining the composite cleaning sequence of the zones.

8. The timing control method for multi-layer filter screen partition cleaning according to claim 1, characterized in that, S3 includes generating a corresponding action schedule for each mobile cleaning platform. The action schedule defines the walking period, air jetting period, water spraying period, and rest period of the mobile cleaning platform in each cleaning zone, and the action schedule is generated according to the composite cleaning sequence of the zones.

9. The timing control method for multi-layer filter screen partition cleaning according to claim 8, characterized in that, The partitioned composite cleaning sequence, by combining the layer sequence, the walking direction, and the insertion of the blocking sequence, is constructed such that any two mobile cleaning platforms on the same air supply branch or the same water supply branch have no time overlap between their air jetting period and water spraying period, so that synchronous spraying is automatically avoided when controlled according to the action schedule.

10. The timing control method for multi-layer filter screen partition cleaning according to claim 9, characterized in that, In the partitioned composite cleaning sequence, the air jetting and water spraying periods of each cleaning partition of the upper filter screen are arranged before the air jetting and water spraying periods of its corresponding lower filter screen cleaning partition, so that when the operation is executed sequentially according to the action schedule, the corresponding cleaning partitions of the upper and lower layers are cleaned in the order of upper layer first and lower layer last.

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