Super-large water level variable-amplitude layered water taking regulation and control system and method based on multi-parameter feedback

Abstract

The invention relates to the technical field of lifting irrigation pump stations, in particular to an ultra-large water level variable-amplitude layered water taking regulation and control system and method based on multi-parameter feedback. The internal water lifting pipeline system is arranged in the external sleeve system; the modularized pump body mounting unit is arranged at the bottom of the internal water lifting pipeline system; one end of the submersible pump reserved cable and one end of the maintenance cable are fixedly connected with the submersible pump; the layered floating water taking devices are arranged at different elevation positions at intervals along the length direction of the internal water lifting pipeline system; and the rapid maintenance system is arranged at the top of the internal water lifting pipeline system. According to the system, the external sleeve system is obliquely arranged along the bank slope and covers the water level change interval between the lowest water level for many years and the highest water level for many years, so that the system can be suitable for the ultra-large water level variable amplitude reservoir or river channel scene with the water level variable amplitude reaching or exceeding 60 m.

Description

Technical Field

[0001] This invention relates to the field of pumping station technology, and in particular to a stratified water intake control system and method for ultra-large water level fluctuation based on multi-parameter feedback. Background Technology

[0002] Around reservoirs, rivers, and lakes in high-altitude, mountainous, or arid and semi-arid regions, water resource development and utilization have long been constrained by complex natural conditions. These constraints are manifested in problems such as large water level fluctuations, steep bank slopes, fractured geology, and difficulties in construction and maintenance. Existing water intake methods mainly include fixed bank pumping stations, floating or floating boat water intake devices, vertical wells or large-diameter wells, radial wells, and conventional inclined well water intake structures. Among these, fixed bank pumping stations have a simple structure but a fixed intake elevation, while floating or floating boat devices have a certain degree of responsiveness. Well structures achieve water intake through groundwater or seepage recharge. These methods can meet certain water supply needs under normal water level fluctuation conditions.

[0003] To address the need for stratified water intake under conditions of large water level fluctuations, existing technologies often employ structural forms such as concrete inclined pipe wells, vertical well-type water intake towers, stratified gate-type water intakes, or combined hydraulic structures. These solutions typically rely on large-volume concrete hydraulic structures, using well towers, gate chambers, or multi-layer gate arrangements to achieve water intake at different elevations.

[0004] In water environments with water level fluctuations exceeding 60m, existing water intake methods struggle to achieve continuous water intake across the entire elevation range from the lowest to the highest water level in many years. Fixed structures are prone to failure during the dry or flood season, floating structures lack stability under conditions of strong winds, freezing, or rapid currents, and well-type structures are significantly limited by geological conditions. Overall, it is difficult for these methods to maintain continuous structural adaptability and stable operation under conditions of extremely large water level fluctuations. Summary of the Invention

[0005] To overcome the above deficiencies, this invention provides a stratified water intake control system and method with ultra-large water level fluctuation based on multi-parameter feedback, aiming to improve the problem that existing water intake methods are unable to achieve continuous water intake across the entire elevation from the lowest water level in many years to the highest water level in many years.

[0006] In a first aspect, the present invention provides the following technical solution: a multi-parameter feedback-based stratified water intake control system for ultra-large water level fluctuations, comprising: An external sleeve system is laid out at an angle along the bank slope and is fixedly connected in sections by an external sleeve connection structure. An internal water lifting pipeline system, wherein the internal water lifting pipeline system is installed inside the external casing system; A modular pump body installation unit is located at the bottom of the internal water lifting pipeline system. The modular pump body installation unit includes a submersible pump, which is connected to the internal water lifting pipeline system. A submersible pump quick sliding device is provided on the outside of the submersible pump, and the submersible pump quick sliding device is slidably connected to the inner wall of the external sleeve system. The submersible pump has a reserved cable and maintenance cable, one end of which is fixedly connected to the submersible pump. A stratified floating water intake device is provided, wherein the stratified floating water intake device is set at different elevation positions along the length of the internal water intake pipeline system and is connected to the internal water intake pipeline system respectively. The stratified floating water intake device includes an initial state and a working state. A rapid maintenance system is installed at the top of the internal water lifting pipeline system.

[0007] By adopting the above technical solution, the external casing system is laid out along the bank slope and covers the water level fluctuation range from the lowest to the highest water level in many years. This allows the internal water lifting pipeline system to be continuously laid out throughout the entire water level rise and fall range. The layered floating water intake device is set at intervals along different elevations, so that each elevation water layer is always within the selectable range during water level changes. At the same time, the modular pump body installation unit forms a sliding fit with the external casing system through the submersible pump quick sliding device, so that the water lifting system can move along the inclined direction with the rise and fall of the water level. Thus, in the environment of ultra-large water level fluctuation with a water level fluctuation of more than 60m, it can realize continuous water intake from the lowest to the highest water level in many years. This solves the problem that existing fixed, floating and well-type structures cannot maintain continuous water intake capacity under ultra-large water level fluctuation conditions. A guided sliding structure system is constructed using a double-layered metal pipe body. The outer casing system forms a fixed guiding frame, while the inner water lifting pipe system is guided and moved within it by a roller device and a rapid sliding device, thus forming a controllable sliding structure. Compared to traditional hydraulic structures that use rigid fixing methods to adapt to water level changes, this invention achieves structural self-adaptation through the sliding cooperation between metal components, realizing the replacement of complex hydraulic structures with metal prefabricated structures.

[0008] Preferably, the rapid maintenance system includes a steel blocking plate, a water supply pipeline, an expansion joint, a butterfly valve, a check valve, a main water supply pipeline, a maintenance well, a winch, a winch maintenance cable, and a slope-adhering retaining wall. The steel blocking plate is installed between the internal water lifting pipeline system and the water supply pipeline and is interconnected. The expansion joint, butterfly valve, and check valve are installed inside the water supply pipeline. The main water supply pipeline is connected to the main water supply pipeline. The maintenance well is located outside the main water supply pipeline. The winch is located above or to one side of the maintenance well. One end of the winch maintenance cable is fixedly connected to the winch, and the other end of the winch maintenance cable is fixedly connected to the submersible pump's reserved cable and maintenance cable. A winch room is located outside the winch, and the slope-adhering retaining wall is located on the bank slope.

[0009] Preferably, the device also includes a PLC controller, a water level sensor, an electromagnetic flow meter, a wireless transmission module, and a central control platform. The water level sensor and the electromagnetic flow meter are electrically connected to the PLC controller. The PLC controller is electrically connected to the stratified floating water intake device and the submersible pump. The wireless transmission module is connected to the PLC controller and is used to upload water level parameters, flow parameters, and submersible pump operating status data to the central control platform. The PLC controller controls the stratified floating water intake device to switch between the initial state and the working state of the stratified floating water intake device based on the water level parameters, water temperature parameters, and flow parameters, and adjusts the operating status of the submersible pump.

[0010] Preferably, it also includes an outer tube support structure, which is disposed on the outside of the outer sleeve system and fixedly connected to the outer sleeve system.

[0011] Preferably, the internal water lifting pipeline system is fixedly connected in sections by a flange connection structure, and an internal water lifting pipeline roller device is provided on the outside of the internal water lifting pipeline system. The internal water lifting pipeline roller device is slidably connected to the inner wall of the external sleeve system.

[0012] Secondly, the present invention provides the following technical solution: a method for regulating stratified water intake with ultra-large water level fluctuation based on multi-parameter feedback, the method comprising the following steps: S1: Under the premise that the external casing system is laid out along the bank slope and covers the water level variation range from the lowest to the highest water level in many years, obtain the current water level height, water temperature parameters and water pumping flow parameters. S2: Based on the current water level, identify the candidate stratified floating water intake devices within the current water level range from the stratified floating water intake devices deployed at different elevation intervals along the internal water intake pipeline system. S3: Select the target stratified floating water intake device from the candidate stratified floating water intake devices based on the water temperature parameters; S4: Control the target stratified floating water intake device to switch from the initial state of the stratified floating water intake device to the working state of the stratified floating water intake device, and keep the other stratified floating water intake devices in the initial state; S5: Adjust the operating status of the submersible pump according to the flow parameters.

[0013] Preferably, the step of determining candidate stratified floating intake devices based on the current water level includes: The real-time elevation value of the water surface is calculated based on the current water level height detected by the water level detection unit. Read the installation elevation data of each layer of floating water intake device laid out along the internal water intake pipeline system; Calculate the elevation difference between the real-time elevation value and the installation elevation of each layer of floating water intake device; Layered floating water intake devices with elevation differences within a preset surface distance range are selected as candidate layered floating water intake devices.

[0014] Preferably, the steps for selecting a target stratified floating water intake device include: Obtain the water temperature and flow parameters at the corresponding locations of each candidate stratified floating water intake device; The water level, water temperature, and flow rate parameters were standardized separately. The standardized parameters are weighted according to preset weighting coefficients to obtain the comprehensive evaluation value of each candidate stratified floating water intake device. The candidate stratified floating water intake device with the highest comprehensive evaluation value was selected as the target stratified floating water intake device.

[0015] Preferably, the steps for controlling the switching state of the target stratified floating water intake device include: Send a switching control signal to the target stratified floating water intake device; Monitor the status feedback signal of the target stratified floating water intake device; After confirming that the target stratified floating water intake device has entered the working state, keep the other stratified floating water intake devices in the initial state; After the status is confirmed, adjust the operating status of the submersible pump according to the current flow parameters; When an abnormal operating current of the submersible pump is detected or the continuous flow rate is lower than a preset threshold, a maintenance warning signal is sent to the central control platform via a wireless transmission module.

[0016] Preferably, when a water level change is detected to exceed a preset fluctuation threshold, the following steps are performed: Recalculate the real-time water surface elevation; Re-execute the candidate stratified floating intake device screening process; A new comprehensive evaluation value is obtained by recalculating the multi-parameter fusion. Based on the new comprehensive evaluation value, a new target stratified floating water intake device was determined and its status was switched over.

[0017] The present invention has the following beneficial effects: 1. In this invention, the external casing system is laid out along the bank slope and covers the water level fluctuation range from the lowest to the highest water level in many years. This makes the system applicable to reservoirs or rivers with water level fluctuations of 60m or more. The internal water lifting pipeline system slides with the external casing system through the internal water lifting pipeline roller device and forms a stable support system with the external pipe support structure. This allows the water lifting structure to maintain continuous operation and structural stability during large-scale lifting and lowering, and achieves continuous water intake at all elevations.

[0018] 2. In this invention, a multi-parameter fusion decision model is constructed based on water level parameters, water temperature parameters, and flow rate parameters. A comprehensive evaluation value is formed through standardized processing and weighted calculation. The target stratified floating water intake device is automatically determined, and the water intake depth is adaptively adjusted. This stratified control mechanism is not limited to water temperature requirements, but can adjust the weights to achieve intelligent decision-making under different operating targets. When the water level change exceeds the preset threshold, the reconstruction calculation process is automatically triggered, so that the stratified water intake maintains continuity and matching under ultra-large water level fluctuation conditions.

[0019] 3. In this invention, the integrated design of a layered floating water intake device, an inclined extension structure, a full elevation coverage layout, and a modular pump body installation unit, combined with a rapid maintenance system, enables the rapid lifting and replacement of submersible pumps, reducing the need for water-based operations. At the same time, the combination of PLC control and wireless transmission modules enables remote monitoring and early warning management, making the system suitable for high-altitude, difficult construction, or inconvenient transportation areas, maintaining stable operation and maintainability under complex environmental conditions.

[0020] 4. In this invention, a prefabricated metal structure system is formed by a metal casing system deployed along the riverbank slope and an internal sliding water lifting pipeline system, enabling continuous water intake across the entire elevation even when the water level fluctuation reaches or exceeds 60m. This structure eliminates the need for complex hydraulic structures such as concrete well towers or layered gate chambers; structural adaptation is achieved solely through the assembly and guided sliding of metal components. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the inclined well water intake method and structure of the ultra-large water level amplitude stratified water intake control system and method based on multi-parameter feedback proposed in this invention. Figure 2 This is a schematic diagram of the modular pump body installation unit of the ultra-large water level variation stratified water intake control system based on multi-parameter feedback proposed in this invention. Figure 3This is a schematic diagram of the roller device of the internal water lifting pipeline system of the ultra-large water level variation stratified water intake control system based on multi-parameter feedback proposed in this invention; Figure 4 This is a schematic diagram of the internal pipeline system connection method of the ultra-large water level variation stratified water intake control system based on multi-parameter feedback proposed in this invention; Figure 5 This is a schematic diagram of the outer pipe support structure and connection method of the ultra-large water level amplitude stratified water intake control system based on multi-parameter feedback proposed in this invention. Figure 6 This is a schematic diagram of the stratified floating water intake device of the ultra-large water level variation stratified water intake control system based on multi-parameter feedback proposed in this invention. Figure 7 This is a schematic diagram of the rapid maintenance platform structure of the ultra-large water level amplitude stratified water intake control system based on multi-parameter feedback proposed in this invention. Figure 8 This is a flowchart of the ultra-large water level variation stratified water intake control method based on multi-parameter feedback proposed in this invention.

[0022] In the attached diagram: 1. Modular pump body installation unit; 2. Internal water lifting pipeline system; 3. External sleeve system; 4. External pipe support structure; 5. Layered floating water intake device; 6. Quick maintenance system; 7. Submersible pump; 8. Submersible pump quick sliding device; 9. Submersible pump reserved cable and maintenance cable; 10. Internal water lifting pipeline roller device; 11. Flange connection structure; 12. External sleeve connection structure; 13. Initial state of layered floating water intake device; 14. Working state of layered floating water intake device; 15. Steel plug plate; 16. Water delivery pipeline; 17. Expansion joint; 18. Butterfly valve; 19. Check valve; 20. Main water delivery pipeline; 21. Inspection well; 22. Winch maintenance cable; 23. Winch room; 24. Winch; 25. Sloping retaining wall. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: In a first embodiment of the present invention, the present invention provides a stratified water intake control system with ultra-large water level fluctuation based on multi-parameter feedback, such as... Figures 1-7 As shown, it includes: External sleeve system 3 is laid out at an angle along the bank slope and is fixedly connected in sections by external sleeve connection structure 12. Internal water lifting pipeline system 2 is installed inside the external casing system 3; Modular pump body installation unit 1 is located at the bottom of the internal water lifting pipeline system 2. Modular pump body installation unit 1 includes a submersible pump 7, which is connected to the internal water lifting pipeline system 2. A submersible pump quick sliding device 8 is provided on the outside of the submersible pump 7, which is slidably connected to the inner wall of the external sleeve system 3. The submersible pump has a reserved cable and maintenance cable 9, one end of which is fixedly connected to the submersible pump 7. The layered floating water intake device 5 is set at different elevation positions along the length of the internal water intake pipeline system 2 and is connected to the internal water intake pipeline system 2 respectively. The layered floating water intake device 5 includes an initial state 13 and a working state 14. Rapid maintenance system 6 is installed on top of the internal water lifting pipeline system 2.

[0025] Specifically, in actual use, the external casing system 3 is laid out along the bank slope and covers the water level fluctuation range from the lowest to the highest water level in many years, forming a water intake channel that adapts to changes in water level. The internal water lifting pipeline system 2 is set inside the external casing system 3 and can slide relative to it within the external casing system 3. The modular pump body installation unit 1 is arranged at the bottom of the internal water lifting pipeline system 2. The submersible pump 7 is connected to the internal water lifting pipeline system 2 to achieve water lifting. The submersible pump quick sliding device 8 is slidably connected to the inner wall of the external casing system 3, so that the submersible pump 7 can move along the inclined direction within the external casing system 3 with the internal water lifting pipeline system 2, thereby adapting to changes in water intake position under different water level conditions. The submersible pump reserved cable and maintenance cable 9 are fixedly connected to the submersible pump 7 for traction and control during maintenance or lifting, ensuring safe and reliable operation even under conditions of extremely large water level fluctuations. When the water level is at different elevations, the stratified floating water intake devices 5, which are spaced apart along the length of the internal water intake pipeline system 2, are located at different elevations and are connected to the internal water intake pipeline system 2. By controlling the stratified floating water intake devices 5 to switch between the initial state 13 and the working state 14, selective water intake from different water layers can be achieved to meet the needs of surface water intake or water intake from specific temperature water layers. The rapid maintenance system 6 is set at the top of the internal water intake pipeline system 2. When maintenance is required on the submersible pump 7 or the internal water intake pipeline system 2, the submersible pump's reserved cable and maintenance cable 9 are used in conjunction with the rapid maintenance system 6 to carry out lifting or replacement operations. The equipment maintenance can be completed without removing the external casing system 3, thereby achieving safe, stable, and maintainable stratified water intake regulation operation under conditions of large water level changes and complex bank slopes.

[0026] Furthermore, the rapid maintenance system 6 includes a steel blocking plate 15, a water supply pipe 16, an expansion joint 17, a butterfly valve 18, a check valve 19, a main water supply pipe 20, a maintenance well 21, a winch 24, a winch maintenance cable 22, and a slope-adhering retaining wall 25. The steel blocking plate 15 is installed between the internal water lifting pipe system 2 and the water supply pipe 16 and is interconnected. The expansion joint 17, butterfly valve 18, and check valve 19 are installed inside the water supply pipe 16. The main water supply pipe 20 is connected to the water supply pipe 16. The maintenance well 21 is located outside the main water supply pipe 20. The winch 24 is located above or to one side of the maintenance well 21. One end of the winch maintenance cable 22 is fixedly connected to the winch 24, and the other end of the winch maintenance cable 22 is fixedly connected to the submersible pump reserved cable and the maintenance cable 9. A winch room 23 is installed outside the winch 24, and the slope-adhering retaining wall 25 is installed on the bank slope.

[0027] Specifically, the internal water lifting pipeline system 2 is connected to the water delivery pipeline 16 through the steel plug plate 15. After being lifted by the submersible pump 7, the water enters the water delivery pipeline 16 and is transported to the onshore water system through the main water delivery pipeline 20. The expansion joint 17 is installed on the water delivery pipeline 16 to absorb the axial displacement caused by water level changes or the internal water lifting pipeline system 2 sliding along the external sleeve system 3, so as to avoid stress concentration caused by pipeline deformation. The butterfly valve 18 is used for opening and closing control and flow regulation. The check valve 19 is used to prevent water backflow and ensure the stability of the water flow direction inside the system under pump stoppage or emergency conditions, thereby maintaining the continuity and safety of the water delivery system under ultra-large water level fluctuation conditions. When it is necessary to inspect the submersible pump 7 or the internal water lifting pipeline system 2, the user first closes the water supply channel through the butterfly valve 18 and uses the steel plug plate 15 to isolate the internal water lifting pipeline system 2 from the water supply pipeline 16. Then, the user operates the winch 24 at the inspection well 21. The winch 24 is connected to the submersible pump's reserved cable and inspection cable 9 through the winch inspection cable 22. The submersible pump 7 and its modular pump body installation unit 1 are lifted to the inspection position along the direction of the external casing system 3. The winch room 23 protects the winch 24 and facilitates centralized management and operation. Ground operation is achieved through the inspection well 21. Equipment replacement and maintenance can be completed without removing the main water supply pipeline 20 or the external casing system 3. Thus, fast, safe and repeatable maintenance operations can be achieved in complex bank slope environments and under conditions of large water level changes. The slope-mounted retaining wall 25 is set at the bank slope as part of the rapid maintenance system 6. It is used to provide a stable installation foundation and anti-slip support for the winch 24 and related maintenance equipment to ensure the stability and safety of the winch 24 during the lifting of the submersible pump 7 and the modular pump body installation unit 1.

[0028] Furthermore, it also includes a PLC controller, a water level sensor, an electromagnetic flow meter, a wireless transmission module, and a central control platform. The water level sensor and the electromagnetic flow meter are electrically connected to the PLC controller. The PLC controller is electrically connected to the stratified floating water intake device 5 and the submersible pump 7. The wireless transmission module is connected to the PLC controller and is used to upload water level parameters, flow parameters, and submersible pump operating status data to the central control platform. The PLC controller controls the stratified floating water intake device 5 to switch between the initial state 13 and the working state 14 of the stratified floating water intake device according to the water level parameters, water temperature parameters, and flow parameters, and adjusts the operating status of the submersible pump 7.

[0029] Specifically, the water level sensor collects the current water level in the reservoir in real time and transmits the water level parameters to the PLC controller. The electromagnetic flow meter detects the actual water flow in the water conveyance pipeline 16 and feeds back the flow parameters to the PLC controller. At the same time, combined with the water temperature parameters of the water layers where each layered floating water intake device 5 is located, the PLC controller performs a comprehensive analysis and judgment on the water level parameters, water temperature parameters, and flow parameters. When the water level rises or falls to a preset height range, it automatically identifies the current effective water intake elevation range, selects the target water intake layer from the layered floating water intake devices 5 arranged at different elevations along the internal water lifting pipeline system 2, and controls the target layered floating water intake device 5 to switch from the initial state 13 to the working state 14, so that the corresponding water layer participates in water intake. The other layered floating water intake devices 5 remain in the initial state, thereby realizing adaptive adjustment of the water intake depth as the water level changes. During the water intake process, the PLC controller adjusts the operating speed of the submersible pump 7 based on the real-time flow parameters fed back by the electromagnetic flowmeter, so that the water intake flow rate is maintained within the preset range to form a closed-loop control. When an abnormal operating current of the submersible pump 7 is detected or the flow rate is continuously lower than the set threshold, the PLC controller uploads the water level parameters, flow parameters and equipment operating status data to the central control platform through the wireless transmission module and triggers remote early warning information. Users can monitor and remotely manage the system operating status in real time on the central control platform. The stratified water intake operation under ultra-large water level fluctuation conditions can be grasped without on-site duty, thereby realizing automatic water level identification, adaptive water intake depth and real-time flow control.

[0030] Furthermore, it also includes an outer tube support structure 4, which is disposed on the outside of the outer sleeve system 3 and fixedly connected to the outer sleeve system 3.

[0031] Specifically, in the actual engineering layout, the external casing system 3 is laid obliquely along the bank slope and covers the water level fluctuation range from the lowest to the highest water level in many years. To ensure the overall stability of the external casing system 3 under long-distance oblique layout and ultra-large water level fluctuation conditions, an external pipe support structure 4 is set on its outer side. The external pipe support structure 4 is fixedly connected to the external casing system 3 and is used to provide lateral support and limit the external casing system 3, so as to avoid displacement or vibration caused by water level changes, sliding of the internal water lifting pipeline system 2 or water flow impact, thereby ensuring that the external casing system 3 maintains structural stability under complex bank slope environment and large water level fluctuation conditions. During long-term operation, when the internal water intake pipeline system 2 and the modular pump body installation unit 1 move along the direction of the external casing system 3 with the change of water level, the external pipe support structure 4 provides stable support for the external casing system 3, limiting its deformation or slippage. This ensures the accurate deployment and stable operation of the stratified floating water intake device 5 at different elevation positions, enabling the entire stratified water intake system to maintain structural safety and reliable operation under complex bank slope environments and large-scale water level changes.

[0032] Furthermore, the internal water lifting pipeline system 2 is fixedly connected in sections by the flange connection structure 11, and an internal water lifting pipeline roller device 10 is provided on the outside of the internal water lifting pipeline system 2. The internal water lifting pipeline roller device 10 is slidably connected to the inner wall of the external sleeve system 3.

[0033] Specifically, the internal water lifting pipeline system 2 adopts a segmented structure and is sequentially fixedly connected by flange connection structure 11 to form an integral pipeline, which facilitates segmented transportation and on-site assembly at different slope sections. At the same time, when maintenance or replacement is required, partial disassembly and assembly can be achieved by disassembling the flange connection structure 11, thereby meeting the design requirements of modularity, disassembly and easy maintenance in the briefing. The internal water lifting pipeline system 2 is installed inside the external casing system 3, and internal water lifting pipeline roller devices 10 are evenly arranged on its outer side. The internal water lifting pipeline roller devices 10 are slidably connected to the inner wall of the external casing system 3, so that the internal water lifting pipeline system 2 forms a guideable sliding structure inside the external casing system 3. When the water level changes significantly, the modular pump body installation unit 1 and the submersible pump 7 drive the internal water lifting pipeline system 2 to move along the inclined direction of the external casing system 3. The internal water lifting pipeline roller device 10 rolls or slides on the inner wall of the external casing system 3, thereby reducing frictional resistance and ensuring guiding stability during the movement, avoiding the internal water lifting pipeline system 2 from deviating or getting stuck. At the same time, the flange connection structure 11 ensures the sealing and strength between each section of the pipeline, maintains the overall rigidity under the impact of water flow and its own weight, and keeps the layered floating water intake device 5 accurately positioned at different elevations, achieving adaptive operation for ultra-large water level fluctuations.

[0034] Example 2: In high-altitude canyon reservoirs or deep river valleys, water levels are affected by seasonal inflows and operational scheduling, with annual water level fluctuations exceeding 60 meters. Furthermore, water temperature exhibits a distinct vertical stratification. In such scenarios, when water levels rise or fall rapidly or cross multiple intake elevations, relying on fixed intake layers or manual adjustments can easily lead to problems such as intake layer lag, unstable water quality, or flow fluctuations. This is especially problematic under continuous operation or unattended conditions, where it becomes difficult to dynamically adjust the intake depth based on water level changes, resulting in an inability to consistently and stably extract water from the target water layer. To address these issues, this invention provides a multi-parameter feedback-based method for regulating stratified water intake with ultra-large water level fluctuations, the structure of which is as follows: Figures 1-8 As shown. The specific implementation process of this method is as follows: S1: Under the premise that the external casing system 3 is laid out along the bank slope and covers the water level variation range from the lowest water level to the highest water level in many years, obtain the current water level height, water temperature parameters and water pumping flow parameters. S2: Based on the current water level, determine the candidate layered floating water intake devices within the current water level range from the layered floating water intake devices 5 arranged at different elevation intervals along the internal water intake pipeline system 2. S3: Select the target stratified floating water intake device from the candidate stratified floating water intake devices 5 based on the water temperature parameters; S4: Control the target stratified floating water intake device 5 to switch from the initial state 13 of the stratified floating water intake device to the working state 14 of the stratified floating water intake device, and keep the other stratified floating water intake devices in their initial state. S5: Adjust the operating status of submersible pump 7 according to the flow parameters.

[0035] Specifically, the external casing system 3 is laid out along the sloping bank and covers the water level fluctuation range from the lowest to the highest water level in many years, forming a stable water intake channel that runs through the entire water level fluctuation range. Based on this structure, the current water level is obtained by water level sensors, water temperature sensors deployed in the reservoir area, and electromagnetic flow meters installed on the water conveyance pipeline. Water temperature parameters and water lifting flow rate parameters ,in This indicates the current real-time water surface elevation, in meters. This represents the instantaneous temperature value of the target water layer, in degrees Celsius. This represents the volumetric flow rate through the electromagnetic flowmeter per unit time, expressed in cubic meters per hour. The acquired signal undergoes data filtering and noise reduction processing by the PLC controller before being used as input data for subsequent judgments. In one implementation, a moving average algorithm is used to analyze the continuous flow rate. The sampled values ​​are smoothed using the following formula: ; in For the first The instantaneous flow rate value of the next sample. The smoothed flow rate value. The number of samples is a positive integer. This processing method ensures that the input data remains stable and consistent under conditions of water level fluctuations or flow pulsations. Obtaining real-time water level height Then, the PLC controller uses the installation elevation data of each layer of floating water intake device 5 arranged along the length of the internal water intake pipeline system 2. Perform matching and judgment, where Indicates the first The installation elevation values ​​corresponding to each stratified floating water intake device 5 are shown in meters. Number the natural numbers, and calculate The elevation difference between the water surface and each water intake device is obtained, and those that meet the requirements are selected. Located within the preset surface distance range The internal water intake device is considered as a candidate stratified floating water intake device, among which and These represent the minimum and maximum allowable surface distance values, respectively. After the candidate set is constructed, the water temperature parameters corresponding to each candidate device are... Comparative analysis, among which Indicates the first The temperature of the water layer where each candidate device is located is calculated. Obtain the target set temperature The degree of temperature deviation between them To preset the target temperature value, a comprehensive evaluation calculation is performed by combining flow rate factors in one possible manner, resulting in a comprehensive evaluation function: ; in For the first The comprehensive evaluation value of the candidate stratified floating water intake devices , , The weighting coefficients are satisfied. , , and These are the dimensionless results of elevation difference, temperature deviation, and flow parameters after linear normalization. (The text then abruptly shifts to a different topic:) By comparing and selecting the stratified floating water intake device with the best evaluation value, a multi-parameter collaborative decision-making logic is realized. After identifying the target stratified floating water intake device 5, the PLC controller sends a control signal to the device, switching it from the initial state 13 to the working state 14. Simultaneously, the remaining stratified floating water intake devices remain in their initial states, ensuring that only the target water layer participates in water intake. After the state switch is complete, the system adjusts the flow rate parameters based on real-time data. With preset flow range When comparing, Deviation from target flow At that time, by adjusting the operating speed of submersible pump 7 To achieve closed-loop control, the proportional adjustment relationship can be expressed as: ; in This is the current rotational speed value. To adjust the speed value, For adjustment coefficients, With the target flow rate as the benchmark, a dynamic feedback loop is formed through continuous detection and adjustment. When the water level change exceeds the preset amplitude threshold, the candidate screening and comprehensive evaluation process is re-executed to achieve adaptive adjustment of the water intake depth. The overall operation process is reflected in the continuous control logic of data acquisition, parameter processing, hierarchical screening, state switching and flow closed-loop regulation, thereby completing the hierarchical water intake regulation task under ultra-large water level fluctuation conditions.

[0036] Furthermore, the steps for determining candidate stratified floating intake devices based on the current water level include: The real-time elevation value of the water surface is calculated based on the current water level height detected by the water level detection unit. Read the installation elevation data of each layer of floating water intake device 5 laid along the internal water intake pipeline system 2; Calculate the elevation difference between the real-time elevation value and the installation elevation of each layer of floating water intake device; Layered floating water intake devices with elevation differences within a preset surface distance range are selected as candidate layered floating water intake devices.

[0037] Specifically, the selection of candidate stratified floating water intake devices is matched with the structural form of the external casing system 3 being laid out along the bank slope and the stratified floating water intake devices 5 being laid out at different elevation intervals along the internal water intake pipeline system 2. The control unit or PLC controller receives the current water level height information output by the water level detection unit and converts the water level height into the real-time elevation value corresponding to the water surface as the reference quantity for elevation matching. The real-time elevation value can optionally be represented using an elevation reference system unified with engineering surveying, such as using the established level datum of the reservoir area as the zero point or the engineering-set reference elevation as the zero point for conversion, thereby ensuring that elevation data from different sources can directly participate in the calculation. The water level detection unit can be composed of water level sensors and transmits the sampled values ​​to the control unit through electrical connection. The control unit can optionally perform noise reduction and smoothing processing on the water level sampling sequence to reduce the instantaneous deviation caused by waves, backwater, or short-period disturbances. In one possible approach, a moving average filter is used to obtain the effective water level height value for screening. The calculation formula is as follows: ; in Indicates the first The instantaneous water level height value obtained from the second sampling. This represents the number of samples used in the averaging process and is a positive integer. This represents the effective value of the smoothed water level height, achieved through... The real-time water surface elevation value is obtained by performing elevation conversion. In one possible conversion method, it can be expressed as: ; in This indicates the reference elevation value corresponding to the selected elevation datum. This indicates the real-time elevation value corresponding to the water surface; After establishing a real-time water surface elevation benchmark, the control unit reads the installation elevation data of each layer of floating water intake device 5 laid along the internal water intake pipeline system 2. The installation elevation data can be obtained through measurement and calibration during the system installation and commissioning phase and written into the parameter table of the control unit. The parameter table can be indexed according to the number of the stratified floating water intake device 5, enabling the control unit to quickly read the installation elevation value corresponding to each device during operation. Indicates the first The installation elevation value of the stratified floating water intake device 5 The control unit uses natural numbers to calculate the difference between the real-time water surface elevation and the installed elevation to obtain the elevation difference value. The calculation formula is as follows: ; in Indicates the water surface and the first Elevation difference between the stratified floating water intake devices A positive value indicates that the stratified floating water intake device is located below the water surface. A negative value indicates that the stratified floating water intake device is located above the water surface, thus providing a quantitative basis for direct judgment in candidate screening; After calculating the elevation difference, the control unit filters each stratified floating water intake device based on a preset surface distance interval. This preset surface distance interval limits the candidate water intake depth range. Its setting is based on the operational requirements outlined in the handover document, including adaptive water intake depth with water level changes and priority surface water intake. The preset surface distance interval can be stored in the control unit as a configurable parameter, with a lower limit defined as the interval. and the upper limit of the interval This indicates that the unit can be consistent with the elevation, using meters, and the screening criteria can be expressed as: ; in This represents the minimum permissible surface distance threshold. This represents the maximum allowed surface distance threshold, when the first... When a stratified floating water intake device meets the above interval conditions, the stratified floating water intake device is included in the candidate stratified floating water intake device set. The candidate set can be represented as: ; in This represents the set of candidate stratified floating water intake devices. By constructing the candidate set, the subsequent water temperature parameter determination and target stratified floating water intake device selection process can be limited to devices that are feasible for water intake under the current water level conditions. This ensures that the control logic is consistent with the deployment elevation logic of the stratified floating water intake device 5, thereby supporting the effective switching and application of the stratified floating water intake device 5 between the initial state 13 and the working state 14, and meeting the adaptive stratified water intake regulation requirements under ultra-large water level fluctuation conditions.

[0038] Further steps in selecting a target stratified floating water intake device include: Obtain the water temperature and flow parameters at the corresponding locations of each candidate stratified floating water intake device; The water level, water temperature, and flow rate parameters were standardized separately. The standardized parameters are weighted according to the preset weighting coefficients to obtain the comprehensive evaluation value of each candidate stratified floating water intake device. The candidate stratified floating water intake device with the highest comprehensive evaluation value was selected as the target stratified floating water intake device.

[0039] Specifically, after the candidate stratified floating water intake device set is constructed, the control unit or PLC controller acquires the water temperature and flow parameters of each stratified floating water intake device in the candidate set. The water temperature parameters can be collected by water temperature sensors deployed at different elevations, and the flow parameters can be provided by electromagnetic flow meters installed on the water delivery pipeline in real time. At the same time, the elevation information corresponding to the current water level is combined to form a multi-parameter input set. In order to achieve multi-parameter collaborative decision-making, the control unit first performs unified dimension processing and standardization processing on the original parameters to eliminate the impact of the dimension difference between different physical quantities on the comprehensive evaluation. In one possible implementation, for the candidate set of the... The water temperature parameter is defined for each stratified floating water intake device. The unit is degrees Celsius, and the flow rate parameter is defined as follows. The unit is cubic meters per hour, and the corresponding elevation difference is defined as... The unit is meters. During standardization, a linear normalization algorithm can be used to perform dimensionless transformation on each parameter. This linear normalization algorithm is a type of data preprocessing algorithm; its core idea is to map the raw data to an interval. Specifically, "inner" can be represented as: ; ; ; in and These represent the minimum and maximum values ​​of the water temperature parameter in the candidate set, respectively. and These represent the minimum and maximum values ​​of the flow parameter, respectively. and These represent the minimum and maximum values ​​of the elevation difference, respectively, obtained after normalization. , as well as All are dimensionless parameters and their values ​​are within the range of Within the interval, this ensures that different physical quantities are comparable in subsequent weighted calculations; After standardization, the control unit calculates a comprehensive evaluation value by weighting each parameter according to preset weighting coefficients. These preset weighting coefficients can be configured based on the project's operational objectives. For example, increasing the weight of water temperature when emphasizing water quality control, increasing the weight of flow rate when emphasizing water supply stability, and increasing the weight of elevation difference when prioritizing surface water intake. Let the weight of water temperature be... Traffic weight is Elevation weight is ,in , , All are non-negative real numbers and satisfy , No. The comprehensive evaluation value of the candidate stratified floating water intake device can be expressed as: ; in For the first The comprehensive evaluation value of each candidate stratified floating water intake device is obtained by analyzing the candidate set. The selection process involves comparing and selecting the stratified floating water intake device with the highest comprehensive evaluation value as the target stratified floating water intake device. This selection process can be completed by the control unit through traversal calculation or by a sorting algorithm. The sorting algorithm can be a conventional comparison sorting algorithm, such as quicksort or heapsort. Its function is to sort the candidate set according to the evaluation value, thereby determining the optimal target layer. After the target stratified floating water intake device is determined, the control unit outputs a control signal to switch the target device from the initial state 13 of the stratified floating water intake device to the working state 14 of the stratified floating water intake device. The selection result is combined with the current water level change trend and flow regulation logic to realize adaptive adjustment of water intake depth. This multi-parameter weighted calculation and decision-making process makes the candidate selection result not only based on a single water temperature or a single water level condition, but also based on a comprehensive judgment of three non-electrical variables: water level, water temperature and flow rate. This forms a decision-making mechanism that meets the requirements of multi-parameter feedback and intelligent control in the briefing, thereby maintaining the consistency and continuity of the stratified water intake control logic under ultra-large water level fluctuation conditions.

[0040] Furthermore, the steps for controlling the switching state of the target stratified floating water intake device include: Send a switching control signal to the target stratified floating water intake device; Monitor the status feedback signal of the target stratified floating water intake device; After confirming that the target stratified floating water intake device has entered the working state, keep the other stratified floating water intake devices in the initial state; After the status is confirmed, the operating status of submersible pump 7 is adjusted according to the current flow parameters; When an abnormal operating current or a continuous flow rate below a preset threshold is detected in the submersible pump 7, a maintenance warning signal is sent to the central control platform via the wireless transmission module.

[0041] Specifically, after determining the target stratified floating water intake device through multi-parameter fusion calculation, the control unit or PLC controller sends a switching control signal to the corresponding numbered stratified floating water intake device. This control signal can be in the form of an electrical signal or a digital control command, and is transmitted to the drive actuator inside the stratified floating water intake device through an electrical connection line, so that it changes from the initial state 13 of the stratified floating water intake device to the working state 14 of the stratified floating water intake device. The actuator can be an electric opening and closing structure or a controllable valve structure. Its switching process is structurally consistent with the internal water lifting pipeline system 2, ensuring that the target water layer participates in water intake while other water layers remain closed. After sending the control signal, the control unit synchronously starts the status feedback monitoring process. The status feedback signal can be provided by the position sensor or switch quantity feedback module set on the stratified floating water intake device, which is used to confirm whether the drive mechanism has reached the preset working position. The control unit determines that the switching is complete only after receiving the feedback signal and verifying that it is consistent with the target state, thereby avoiding misjudgment of the state due to actuator jamming or mechanical delay. After confirming that the target stratified floating water intake device has entered the working state, the control unit keeps the other stratified floating water intake devices in the initial state to ensure that only one target water layer participates in water intake at any given time, avoiding water mixing or flow fluctuations caused by multiple layers operating simultaneously. After completing the status confirmation, the system enters the flow regulation stage, and the control unit adjusts the flow rate based on the real-time flow value fed back by the electromagnetic flowmeter. With target flow set value The deviation between them is adjusted, and the flow deviation is defined as: ; in This indicates flow rate error, with the unit consistent with flow rate. This indicates the preset target traffic value. This indicates that the flow rate is detected in real time. In one possible implementation, a proportional-integral (PI) control algorithm is used to adjust the speed of the submersible pump 7. This algorithm is a common closed-loop control algorithm, and its control output can be expressed as: ; in Indicates the control output signal. This is the proportionality coefficient. The integral coefficient is... For a moment Flow error, As the integral time variable, by adjusting the proportional coefficient and integral coefficient, the submersible pump 7 can maintain stable operation under different water level conditions and avoid frequent fluctuations. This control signal is output to the drive unit of the submersible pump 7 through the PLC controller to realize speed regulation. During system operation, the control unit simultaneously monitors the operating current value of the submersible pump 7. With flow parameters When the operating current Exceeding the preset current threshold Or below the preset current lower limit When an abnormal operating condition is detected, abnormal current can reflect mechanical jamming or abnormal load conditions. Simultaneously, when the flow rate parameter is within a consecutive number of sampling periods... Below the preset flow limit At this time, a duration threshold can be set. Make a judgment when the condition is met. When a potential fault risk is identified, the control unit uploads the current water level, water temperature, flow rate, and current parameters to the central control platform via a wireless transmission module after any abnormal condition is triggered. It also generates a maintenance warning signal. The central control platform receives the data, records and displays it, and the operation and management personnel can arrange maintenance operations based on the warning information. The entire process realizes continuous control logic from target layer switching, status confirmation, flow closed-loop adjustment to abnormal monitoring and remote early warning, ensuring that the stratified floating water intake device 5 and submersible pump 7 maintain stable operation under ultra-large water level fluctuation conditions.

[0042] Furthermore, when a water level change is detected to exceed a preset threshold, the following steps are executed: Recalculate the real-time water surface elevation; Re-execute the candidate stratified floating intake device screening process; A new comprehensive evaluation value is obtained by recalculating the multi-parameter fusion. Based on the new comprehensive evaluation value, a new target stratified floating water intake device was determined and its status was switched over.

[0043] Specifically, the control unit or PLC controller continuously receives water level height data output by the water level detection unit and forms a water level time series. The water level change amplitude is obtained by calculating the difference between the real-time elevations of adjacent sampling times. When the water level change amplitude exceeds a preset amplitude threshold, a dynamic reconstruction process is triggered. The preset amplitude threshold is used to characterize the judgment condition that the water intake level may drift significantly under ultra-large water level fluctuation conditions. Its value can be configured according to the reservoir water level scheduling rules, the elevation interval layout of the stratified floating water intake device 5, and the operation and maintenance strategy. The water level change amplitude can be represented by the absolute value of the difference between the real-time elevations of the water surface at two moments. The start time of the trigger window is defined as... The current time is The real-time water surface elevations at the two moments are respectively and The range of water level change It can be represented as: ; in The water level change range is expressed in meters, when the following conditions are met. The dynamic refactoring process is triggered at any time, where The preset amplitude threshold is in meters. After triggering, the control unit enters the recalculation process of the real-time water surface elevation. The calculation of the real-time water surface elevation can be updated based on the latest sampling value of the water level detection unit, and can optionally be combined with filtering to output an effective elevation value to ensure the consistency of input in the subsequent screening process. After the real-time elevation of the water surface is updated, the control unit re-executes the candidate stratified floating water intake device screening process. The screening process is based on the installation elevation data of the stratified floating water intake device 5 on the internal water lifting pipeline system 2 and the preset surface distance interval to form a new set of candidate devices. The reconstruction of the candidate set enables the control unit to update the available water intake layer range in a timely manner when the water level rises or falls rapidly or crosses multiple water intake levels, thereby maintaining the control strategy consistent with the actual spatial distribution of the stratified floating water intake device 5. Subsequently, the control unit re-acquires the corresponding water temperature parameters and flow parameters for the new set of candidate devices, and performs standardization processing on the water level parameters, water temperature parameters, and flow parameters. The standardization processing uses a linear normalization algorithm to map parameters of different dimensions to dimensionless parameters to meet the comparability of weighted calculation. Based on the preset weight coefficient, the standardized parameters are weighted and calculated to obtain a new comprehensive evaluation value sequence. The comprehensive evaluation value is used to reflect the water intake adaptability of each candidate device under the current water level and water quality requirements. After obtaining the comprehensive evaluation value sequence, the control unit compares and selects each candidate device to determine the candidate stratified floating water intake device with the largest comprehensive evaluation value as the new target stratified floating water intake device. After the new target stratified floating water intake device is determined, the control unit outputs a switching control signal and executes a state switching process, so that the new target device enters the working state 14 of the stratified floating water intake device from the initial state 13. At the same time, the other stratified floating water intake devices are kept in the initial state. The control unit synchronously monitors the state feedback signal to confirm the switching is completed. After the switching is completed, the operating state of the submersible pump 7 is adjusted accordingly based on the feedback of the electromagnetic flowmeter. This ensures that the system maintains the water intake level and water delivery state that matches the current water level conditions even after the water level changes beyond the threshold. This dynamic reconfiguration process forms a closed loop with the water level exceeding the threshold, candidate screening, multi-parameter fusion calculation, and state switching. It meets the operational logic requirements of automatic water level identification, adaptive water intake depth, and real-time flow control under ultra-large water level fluctuation conditions as stated in the briefing. It also provides a traceable basis for state switching and parameter updates for remote monitoring of the central control platform.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A super-large water level amplitude layered water taking regulation system based on multi-parameter feedback, characterized in that, include: The external sleeve system (3) is laid out at an angle along the bank slope and is fixedly connected in sections by the external sleeve connection structure (12). An internal water lifting pipeline system (2) is installed inside an external casing system (3); Modular pump body installation unit (1), the modular pump body installation unit (1) is set at the bottom of the internal water lifting pipeline system (2), the modular pump body installation unit (1) includes a submersible pump (7), the submersible pump (7) is connected to the internal water lifting pipeline system (2), a submersible pump quick sliding device (8) is provided on the outside of the submersible pump (7), and the submersible pump quick sliding device (8) is slidably connected to the inner wall of the external sleeve system (3); The submersible pump has a reserved cable and maintenance cable (9), one end of which is fixedly connected to the submersible pump (7). The layered floating water intake device (5) is set at different elevation positions along the length direction of the internal water intake pipeline system (2) and is connected to the internal water intake pipeline system (2) respectively. The layered floating water intake device (5) includes the initial state (13) and the working state (14). A rapid maintenance system (6) is installed on top of the internal water lifting pipeline system (2).

2. The multi-parameter feedback based ultra-high water level variable amplitude stratified water intake regulation system according to claim 1, characterized in that, The rapid maintenance system (6) includes a steel plug (15), a water supply pipeline (16), an expansion joint (17), a butterfly valve (18), a check valve (19), a main water supply pipeline (20), a maintenance well (21), a winch (24), a winch maintenance cable (22), and a slope-mounted retaining wall (25). The steel plug (15) is installed between the internal water lifting pipeline system (2) and the water supply pipeline (16) and is interconnected. The expansion joint (17), butterfly valve (18), and check valve (19) are installed inside the water supply pipeline (16). The main water supply pipeline (20) is connected to the water supply pipeline (16). The maintenance well (21) is located outside the main water supply pipeline (20). The winch (24) is located above or to one side of the maintenance well (21). One end of the winch maintenance cable (22) is fixedly connected to the winch (24). The other end of the winch maintenance cable (22) is fixedly connected to the submersible pump reserved cable and maintenance cable (9). A winch room (23) is located outside the winch (24). The slope retaining wall (25) is located on the bank slope.

3. The multi-parameter feedback based ultra-high water level variable amplitude stratified water intake regulation system according to claim 1, wherein, It also includes a PLC controller, a water level sensor, an electromagnetic flow meter, a wireless transmission module and a central control platform. The water level sensor and the electromagnetic flow meter are electrically connected to the PLC controller. The PLC controller is electrically connected to the stratified floating water intake device (5) and the submersible pump (7). The wireless transmission module is connected to the PLC controller and is used to upload water level parameters, flow parameters and submersible pump operating status data to the central control platform. The PLC controller controls the stratified floating water intake device (5) to switch between the initial state (13) and the working state (14) of the stratified floating water intake device according to the water level parameters, water temperature parameters and flow parameters, and adjusts the operating status of the submersible pump (7).

4. The ultra-large water level fluctuation stratified water intake control system based on multi-parameter feedback according to claim 1, characterized in that, It also includes an outer tube support structure (4), which is located outside the outer sleeve system (3) and is fixedly connected to the outer sleeve system (3).

5. The ultra-large water level fluctuation stratified water intake control system based on multi-parameter feedback according to claim 1, characterized in that, The internal water lifting pipeline system (2) is fixedly connected in sections by a flange connection structure (11). An internal water lifting pipeline roller device (10) is provided on the outside of the internal water lifting pipeline system (2). The internal water lifting pipeline roller device (10) is slidably connected to the inner wall of the external sleeve system (3).

6. A method for stratified water intake regulation with ultra-large water level fluctuation based on multi-parameter feedback, characterized in that, The method for the ultra-large water level fluctuation stratified water intake control system based on multi-parameter feedback as described in any one of claims 1-5 includes the following steps: S1: Under the premise that the external casing system (3) is laid out along the bank slope and covers the water level variation range between the lowest and highest water levels in many years, the current water level height, water temperature parameters and water pumping flow parameters are obtained; S2: Based on the current water level, determine the candidate layered floating water intake devices within the current water level range from the layered floating water intake devices (5) arranged at different elevation intervals along the internal water intake pipeline system (2); S3: Select the target stratified floating water intake device from the candidate stratified floating water intake devices (5) according to the water temperature parameters; S4: Control the target stratified floating water intake device (5) to switch from the initial state (13) of the stratified floating water intake device to the working state (14) of the stratified floating water intake device, and keep the other stratified floating water intake devices in the initial state; S5: Adjust the operating status of the submersible pump (7) according to the flow parameters.

7. The method for stratified water intake regulation based on multi-parameter feedback for ultra-large water level fluctuations according to claim 6, characterized in that, The steps for determining candidate stratified floating intake devices based on the current water level include: The real-time elevation value of the water surface is calculated based on the current water level height detected by the water level detection unit. Read the installation elevation data of each layer of floating water intake device (5) laid out along the internal water intake pipeline system (2); Calculate the elevation difference between the real-time elevation value and the installation elevation of each layer of floating water intake device; Layered floating water intake devices with elevation differences within a preset surface distance range are selected as candidate layered floating water intake devices.

8. The method for stratified water intake regulation based on multi-parameter feedback for ultra-large water level fluctuations according to claim 6, characterized in that, The steps for selecting a target stratified floating water intake device include: Obtain the water temperature and flow parameters at the corresponding locations of each candidate stratified floating water intake device; The water level, water temperature, and flow rate parameters were standardized separately. The standardized parameters are weighted according to preset weighting coefficients to obtain the comprehensive evaluation value of each candidate stratified floating water intake device. The candidate stratified floating water intake device with the highest comprehensive evaluation value was selected as the target stratified floating water intake device.

9. The method for stratified water intake regulation based on multi-parameter feedback for ultra-large water level fluctuations according to claim 6, characterized in that, The steps for controlling the switching state of the target stratified floating water intake device include: Send a switching control signal to the target stratified floating water intake device; Monitor the status feedback signal of the target stratified floating water intake device; After confirming that the target stratified floating water intake device has entered the working state, keep the other stratified floating water intake devices in the initial state; After the status is confirmed, the operating status of the submersible pump (7) is adjusted according to the current flow parameters; When an abnormal operating current or a continuous flow rate below a preset threshold is detected in the submersible pump (7), a maintenance warning signal is sent to the central control platform via a wireless transmission module.

10. The method for stratified water intake regulation based on multi-parameter feedback for ultra-large water level fluctuations according to claim 6, characterized in that, When a water level change exceeds a preset threshold, the following steps are executed: again Calculate the real-time elevation of the water surface; Re-execute the candidate stratified floating intake device screening process; A new comprehensive evaluation value is obtained by recalculating the multi-parameter fusion. Based on the new comprehensive evaluation value, a new target stratified floating water intake device was determined and its status was switched over.

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