Intelligent layered water taking device for high dam and deep reservoir and water temperature control method

Abstract

The invention discloses an intelligent layered water taking device for a high dam and a deep reservoir and a water temperature control method, and relates to the technical field of hydraulic engineering and water environment ecological protection. The device comprises a water taking tower, and a winch is arranged at the tower top and connected with a lifting type water taking head through a traction cable; a depth sensor is arranged at the end part of the water taking head, a filter screen is arranged at the lower part, and a valve and a water temperature sensor are arranged inside; a vertical water temperature monitoring chain is arranged on the side face of the water intake tower and used for collecting a reservoir vertical water temperature profile. The water taking head is fixedly connected with a water outlet pipe through a flexible water conveying hose. According to the control method, the water temperature data is processed based on the central controller, the target water taking depth is calculated, the winch is driven to adjust the position of the water taking head, and the water taking temperature is stabilized within the preset target range through valve opening and closing and depth fine adjustment. Automatic layered water taking and accurate water temperature control are achieved, and the water resource utilization efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering and water environment ecological protection technology, specifically to an intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs. Background Technology

[0002] In high-dam reservoirs with considerable depth, temperature stratification is common due to factors such as solar radiation and water density differences. This means that different water layers (typically surface, thermocline, and deep isothermal layer) form from top to bottom. This natural phenomenon has a significant impact on the ecological environment of downstream rivers. Traditional water intake methods, such as fixed-elevation intakes, can only draw water from a single water layer. If water is consistently drawn from the lower-temperature bottom layer, the resulting downstream water temperature will be excessively low, altering the natural temperature regime of the downstream river channel. This severely and adversely affects aquatic life (especially fish spawning, hatching, and growth), a problem known as "low-temperature water."

[0003] To address this problem, stratified water intake technology has emerged. Various stratified water intake facilities already exist, such as multi-layered fixed intakes and stacked beam gates. However, these methods still have significant limitations: 1. Fixed water intake layer: Although multi-layer fixed water intake provides multiple optional water layers, once it is built, the water intake elevation is fixed. It cannot be flexibly and continuously adjusted according to the dynamic changes in reservoir water level fluctuations and vertical water temperature distribution, resulting in poor water intake accuracy and adaptability.

[0004] Complex operation and slow response: Facilities such as stacked beam gates require manual opening and closing, which is cumbersome and time-consuming, making it difficult to achieve rapid and frequent adjustments and failing to meet the need for real-time and precise control of the discharge water temperature.

[0005] Lack of intelligent water temperature sensing and control capabilities: Traditional methods mainly rely on manual experience or periodic water temperature measurements to determine the water intake layer, lacking the ability to monitor the vertical water temperature of the reservoir in real time and continuously, and even more unable to achieve automatic optimization and dynamic tracking control based on the target water temperature.

[0006] Therefore, there is an urgent need in this field for an intelligent stratified water intake technology and equipment that can overcome the above-mentioned shortcomings, and achieve precise, automatic and intelligent control of the downstream water temperature, so as to minimize the negative impact of high dams and deep reservoirs on the downstream ecological environment. Summary of the Invention

[0007] The purpose of this invention is to provide an intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs. By integrating vertical water temperature monitoring, intelligent control and remote communication functions, it realizes automatic and precise vertical positioning of the water intake head and real-time water temperature regulation, thereby ensuring that the downstream water temperature meets the requirements of ecological or industrial and agricultural water use, and improving the automation and intelligence level of water intake operations.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs, comprising a water intake tower, a winch installed at the upper end of the tower, a traction cable connected to the lower end of the winch, and a lifting water intake head suspended from the lower end of the traction cable. A depth sensor is installed on the end face of the lifting water intake head to monitor its current depth in the water in real time. A filter screen is also provided at the lower end of the lifting water intake head to filter out any impurities that may be present in the water, ensuring water quality.

[0009] Furthermore, valves and water temperature sensors are installed inside the lift-type water intake head. The valves control the flow of water, while the water temperature sensors directly measure the water temperature at the intake point. A vertical water temperature monitoring chain is installed on the end face of the water intake tower. This chain consists of multiple water temperature sensors spaced apart vertically, enabling real-time monitoring of water temperature changes at different depths in the reservoir, thus forming complete vertical water temperature profile data. A flexible water delivery hose is connected to the side end of the lift-type water intake head, and the lower end of the flexible water delivery hose is connected to a fixed outlet pipe to realize water delivery.

[0010] Furthermore, the main function of the vertical water temperature monitoring chain is to continuously collect water temperature information of each layer of the reservoir vertically through the collaborative work of multiple water temperature sensors, providing basic data support for water temperature control.

[0011] Furthermore, the winch is controlled by a central controller that can receive real-time data from the vertical water temperature monitoring chain and water temperature sensors, and automatically calculate the target depth that the lifting water intake head needs to reach based on the preset target water temperature value, thereby guiding the lifting and lowering movement of the water intake head.

[0012] Furthermore, the central controller dynamically adjusts the operation of the winch by comparing the deviation between the actual water temperature fed back by the water temperature sensor and the preset target water temperature, so that the lifting water intake head can make fine depth adjustments to reduce the water temperature deviation and ensure that the water temperature is stable within the target range.

[0013] Furthermore, a guide mechanism is provided on the lifting path of the lifting water head. This guide mechanism is firmly connected to the tower wall of the water intake tower and can guide the water head to move smoothly in the vertical direction, preventing the water head from shaking or deviating during the lifting process and ensuring the accuracy of operation.

[0014] Furthermore, the opening and closing of the valves are managed by a central controller. The controller triggers the opening or closing of the valves based on the signal indicating whether the lifting water head has reached the target water intake depth, ensuring that the water intake process and depth control are synchronized.

[0015] Furthermore, the central controller has data recording and storage functions, which can continuously record data such as the reservoir's water temperature profile, the real-time depth of the water intake head, the water intake temperature, and the valve opening and closing status, providing a basis for subsequent analysis and optimization.

[0016] Furthermore, the central controller is also configured to have an early warning capability. When the actual water temperature fed back by the water temperature sensor continues to deviate from the preset target water temperature and cannot be effectively corrected through deep fine-tuning, the controller will automatically trigger an early warning signal and notify the management personnel to intervene manually to prevent the abnormal situation from worsening.

[0017] Furthermore, the central controller has data communication capabilities, enabling it to transmit recorded water temperature profiles, water intake depth, and equipment status data to the monitoring center remotely, thereby achieving remote real-time monitoring and control of the entire system and improving management efficiency.

[0018] This invention provides an intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs, which has the following beneficial effects: 1. This device acquires complete vertical water temperature profile data of the reservoir in real time through a vertical water temperature monitoring chain. The central controller accurately calculates the target depth of the water intake head based on a preset target water temperature (such as a suitable temperature for the survival and reproduction of specific fish species) and drives the winch to position the water intake head to that water layer. This active, closed-loop control method based on real-time water temperature data can continuously output water that meets ecological requirements, minimizing the adverse effects of low-temperature water released from high dams or high-temperature surface water during specific periods on the downstream aquatic ecosystem, and providing a stable and reliable technical means for watershed water environment protection and ecological restoration.

[0019] Traditional stratified water intake systems rely heavily on manual experience or fixed elevation intake, making it difficult to cope with dynamic changes in reservoir water temperature. This device utilizes a dual feedback mechanism—a water temperature sensor integrated into the intake head and a vertical monitoring chain—to create a system where a central controller compares the actual intake water temperature with the target temperature, automatically driving the winch for fine-tuning. This dynamic adjustment mechanism effectively compensates for temperature fluctuations caused by sunlight, inflow, and seasonal changes, ensuring the intake water temperature remains consistently stable within a preset range. This frees management personnel from tedious monitoring and operation, and avoids the lag and inaccuracies that can result from human judgment.

[0020] To address the challenges of high water pressure and complex flow conditions in deep reservoirs, this device incorporates a guiding mechanism along the path of the lifting water intake head. This ensures stable vertical movement along the tower wall during lifting, preventing swaying or collisions with structures. Simultaneously, a flexible water delivery hose connects the movable intake head to the fixed outlet pipe, effectively absorbing displacement and stress generated during the intake head's lifting and lowering, thus avoiding fatigue damage and leakage risks common with rigid connections. This structural design significantly enhances the mechanical reliability and durability of the entire system under harsh operating conditions, reduces maintenance frequency, and ensures the feasibility of long-term continuous operation.

[0021] The central controller not only controls the water flow but also continuously records and stores full-cycle operational data, including water temperature profile, intake head depth, intake water temperature, and valve status. When the system detects that the intake water temperature continuously deviates from the target and automatic fine-tuning is ineffective, it can proactively trigger an early warning signal to notify management personnel to intervene and inspect, preventing prolonged unplanned water intake due to sensor malfunction or drastic changes in the external environment. The accumulated historical data provides valuable scientific basis for analyzing reservoir water temperature evolution patterns, assessing the ecological benefits of the project, and optimizing scheduling schemes, enabling the reservoir operation and management to shift from experience-based to data-driven.

[0022] Leveraging data communication capabilities, this device can remotely transmit all critical operating parameters and equipment status to the monitoring center. Management personnel can then monitor the water intake device around the clock, set target water temperature parameters, and remotely control it without needing to be physically present on-site. This feature is particularly advantageous for high-dam reservoirs located in mountainous areas with poor transportation access, or for scenarios requiring coordinated scheduling of water intakes from multiple cascade hydropower stations. It significantly reduces the safety risks and costs of on-site operation and maintenance, and improves the level of integration and response speed in the unified scheduling and management of water resources in the basin. Attached Figure Description

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the internal structure of the lifting water intake head of the present invention.

[0025] Part Name: 1. Water intake tower; 2. Winch; 3. Traction cable; 4. Lifting water intake head; 5. Depth sensor; 6. Filter screen; 7. Valve; 8. Water temperature sensor; 9. Vertical water temperature monitoring chain; 10. Flexible water delivery hose; 11. Fixed water outlet pipe. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] Example 1: This embodiment details the specific structure and initial operation process of an intelligent stratified water intake device for high dams and deep reservoirs. The core structure of the device is the water intake tower 1 built in the reservoir. This tower is typically a reinforced concrete structure, with its base extending deep into the bedrock or solid foundation of the reservoir bottom, and its body vertically penetrating the depth of the reservoir. To achieve vertical movement of the water intake, a heavy-duty winch 2 is fixedly installed on the top platform of the water intake tower 1. The winch 2 has sufficient lifting capacity and precise braking performance, and it is connected to the lower lifting water intake head 4 via a high-strength, corrosion-resistant traction cable 3 (such as galvanized steel wire rope or synthetic fiber cable).

[0029] The lifting water intake head 4 is a key moving component of this device. Its shape is typically streamlined to reduce water resistance, and its internal cavity structure forms a water flow channel. A high-precision depth sensor 5 is integrated into the top or side wall of the water intake head 4. This sensor continuously measures and provides feedback on the real-time depth of the water intake head relative to the water surface. A large filter screen 6 is installed at the water inlet end of the water intake head 4. Its mesh size is precisely calculated to effectively intercept large floating objects, fish, and other impurities that may clog the pipes, while ensuring sufficient water flow area and minimizing head loss. The initial descent of the water intake head 4 is as follows: The central controller first sends a descent signal to the winch 2 according to a preset program or operator instructions. The winch 2 smoothly releases the traction cable 3, and the lifting water intake head 4 begins to slowly descend along the inner wall of the water intake tower 1 or a specific guide rail under the influence of gravity. The depth sensor 5 continuously transmits position information to the controller. When the water intake head 4 is detected to have reached a preset initial safe depth (this depth is usually set above the possible water temperature change layer), the winch 2 stops lowering, and the water intake head 4 is temporarily suspended at this position, awaiting further water temperature monitoring instructions. This structural design and initial operation ensure that the water intake device can be initially positioned and lay the foundation for subsequent precise stratified water intake based on water temperature.

[0030] Example 2: This embodiment focuses on describing the control logic for water temperature monitoring and water intake head positioning in an intelligent stratified water intake device. A vertical water temperature monitoring chain 9 is installed on the outer or inner side of the water intake tower 1. This monitoring chain consists of multiple high-precision water temperature sensor units connected in series at fixed intervals (e.g., one every 5 or 10 meters), extending from near the water surface to the deepest possible water intake location near the tower foundation. These sensors transmit data to the central controller in real time via wired or wireless means, thereby constructing a continuous water temperature distribution map of the reservoir's vertical profile, clearly showing the stratified water temperature structure (e.g., surface warm water layer, intermediate variable temperature layer, and bottom low-temperature constant temperature layer).

[0031] The central controller (typically an industrial-grade programmable logic controller (PLC) or a distributed control system (DCS)) is the core of the intelligent control system. It has built-in control algorithms and receives and processes all data from the vertical water temperature monitoring chain 9. Operators or the upstream scheduling system set a target water intake temperature (e.g., to meet downstream ecological needs, the water intake temperature must be no lower than 15°C). Based on real-time water temperature profile data, the central controller automatically analyzes and calculates the water layer depth that best matches the target temperature under the current water temperature stratification, and determines this depth as the target depth. Subsequently, the controller sends an action command to the winch 2. The winch 2, according to the command, winds up and unwinds the traction cable 3, driving the lifting water intake head 4 to move to the calculated target depth. The water temperature sensor 8, installed inside the water intake head 4, monitors the actual water temperature at the intake in real time and feeds this data back to the central controller. The controller compares the actual water intake temperature (from sensor 8) with the preset target water temperature. If a slight deviation exists, the controller will initiate a fine-tuning program, instructing winch 2 to raise or lower it within a small range, allowing water intake head 4 to perform a precise search near the target depth until the actual water temperature stabilizes within the target allowable error range. This closed-loop control method ensures the accuracy and stability of the water intake temperature.

[0032] Example 3: This embodiment details the data recording, remote communication, and valve linkage functions of the intelligent stratified water intake device. The central controller not only handles real-time control but is also equipped with a large-capacity data storage unit. This unit continuously records multiple key operational data points at set time intervals (e.g., every minute or every five minutes), including but not limited to: complete vertical water temperature profile data acquired by the vertical water temperature monitoring chain 9, the real-time depth of the lifting water intake head 4 (from depth sensor 5), the actual water temperature at the intake head (from water temperature sensor 8), and the open / closed status of valve 7. This historical data is extremely valuable for analyzing the interannual and intra-annual variations in reservoir water temperature, evaluating water intake effectiveness, and optimizing scheduling schemes.

[0033] Furthermore, the central controller integrates a data communication module, supporting wired (e.g., industrial Ethernet, fiber optic) or wireless (e.g., 4G / 5G, microwave) communication protocols. Through this module, the controller can remotely transmit real-time operating data, historical data, and equipment status information (such as winch motor current, valve open / close signals, etc.) to a central monitoring center located far from the dam. Staff at the monitoring center can monitor all information in real-time on a computer interface, including reservoir water temperature stratification, intake head location, intake water temperature, and equipment operating status. Simultaneously, the monitoring center can also send commands to the on-site central controller, such as modifying target water temperature setpoints, forcibly moving the intake head to a specified depth, or remotely starting or stopping equipment, achieving true remote monitoring and control capabilities.

[0034] The control of valve 7 is usually linked to the positioning of the water intake head. When the lifting water intake head 4 moves to the target water intake depth under the command of the central controller and completes water temperature fine-tuning, the controller receives a confirmation signal that the depth is in place and the water temperature is within acceptable limits. Subsequently, the controller sends an opening command to the actuator of valve 7 (such as an electric or hydraulic drive device). Valve 7 opens slowly, and the reservoir water, under hydrostatic pressure, after initial filtration by filter screen 6, enters the internal cavity of water intake head 4 through the opened valve 7. A high-strength, pressure-resistant, and corrosion-resistant flexible water delivery hose 10 is connected to the side of water intake head 4. This hose can bend and extend as the water intake head rises and falls. After passing through the flexible water delivery hose 10, the water flows into a fixed outlet pipe 11 fixed at the bottom or lower part of the water intake tower, and is finally delivered to downstream water users. When it is necessary to stop water intake or change the water intake layer, the controller first closes valve 7, and then commands winch 2 to move water intake head 4 to prevent movement under load.

[0035] Example 4: This embodiment focuses on the safety warning and handling mechanism of the intelligent stratified water intake device in response to abnormal operating conditions. The central controller's algorithm integrates advanced fault diagnosis and warning logic. During normal operation, the controller continuously monitors the consistency between the actual water intake temperature fed back by the water temperature sensor 8 and the preset target water temperature. Under specific circumstances, such as drastic but temporary changes in the reservoir's water temperature stratification structure (e.g., water mixing caused by strong winds), or partial blockage of the intake head filter 6 leading to localized flow changes affecting temperature measurement accuracy, the actual water intake temperature may continuously deviate from the target value.

[0036] At this point, the controller's fine-tuning function will activate first, attempting to track a suitable water temperature by slightly adjusting the depth of the water intake head 4. However, if, after a preset time (e.g., 30 minutes) or multiple depth fine-tuning attempts, the actual water temperature still cannot stabilize within the target's allowable error range, the control system will determine it as an "adjustment failure" abnormal state. Once this state is triggered, the central controller will automatically generate a warning signal. This warning signal, through its communication module, will notify remote or on-site management personnel in various forms (such as a pop-up alarm box on the monitoring center screen, sending SMS or emails to a preset list of management personnel, triggering an audible and visual alarm, etc.). The warning information will include key data such as the type of abnormality (continuous water temperature deviation), the time of occurrence, the current water intake head depth, and the difference between the target and actual water temperature, so that management personnel can quickly understand the situation.

[0037] Upon receiving an early warning, management personnel can remotely log into the system or go to the site to intervene. Intervention measures may include: checking the reliability of data from water temperature sensor 8 and the vertical water temperature monitoring chain 9 to determine if the sensor is faulty; remotely controlling the water intake head 4 to conduct trial water intake at a known safe water temperature layer; or, if necessary, pausing the automatic control mode and switching to manual mode for detailed equipment inspection and maintenance. This early warning mechanism greatly enhances the system's reliability and ability to handle complex operating conditions, preventing prolonged use of water that does not meet temperature requirements under abnormal circumstances, and ensuring the safety of downstream ecological or engineering water use.

[0038] Example 5: This embodiment, taking into account the water temperature stratification characteristics of high dams and deep reservoirs, illustrates the specific application method of this intelligent stratified water intake device in ecological scheduling. Large reservoirs typically form stable water temperature stratification in summer, with higher water temperatures in the upper layer and lower water temperatures in the lower layer. For rivers downstream with ecological flow water temperature requirements such as fish spawning, it is necessary to release "fish-attracting" water flows at a certain temperature during specific periods (such as spring), or to ensure irrigation water temperature during critical crop growth periods.

[0039] When using this device, the water conservancy project dispatch center will first determine the target temperature range of the water to be released within a certain period (such as one day or one week) based on downstream ecological needs or water usage requirements. The on-site central controller receives this target instruction. Based on the water temperature profile data transmitted in real time by the vertical water temperature monitoring chain 9, the controller accurately identifies the depth of the water layer in the current vertical water temperature distribution of the reservoir that matches the target temperature. For example, if the required released water temperature is 12℃, and the monitoring shows that the water temperature at a depth of 50 meters is exactly 12℃, the controller will instruct the winch 2 to lower the lifting water intake head 4 to a depth of approximately 50 meters.

[0040] Subsequently, fine-tuning is performed based on feedback from water temperature sensor 8 to ensure the water intake is precisely positioned on the 12℃ isotherm. Once valve 7 is opened, water from this temperature layer can be continuously drawn. Because the reservoir's water temperature stratification is dynamic—for example, the thermocline depth slowly shifts with seasonal changes and variations in inflow—the intelligence of this device lies in its central controller's ability to periodically (e.g., hourly) rescan the water temperature profile, automatically tracking changes in the target isotherm's depth and directing the intake head 4 to adjust its hovering depth accordingly. This achieves "active tracking" water intake for this temperature layer. This dynamic adjustment ensures that the temperature of the outflowing water consistently meets the preset ecological or agricultural targets throughout the entire water intake process, effectively mitigating the thermal impact of reservoir construction on the downstream river's ecological environment and demonstrating significant ecological compensation benefits. Simultaneously, the system's recorded data provides detailed scientific evidence for evaluating the effectiveness of ecological regulation.

[0041] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The detailed description of known functions and components is omitted in the specific implementation of this disclosure. To ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart stratified water intake device and water temperature control method for high dams and deep reservoirs, including a water intake tower (1), characterized in that: a winch (2) is provided at the upper end of the water intake tower (1), a traction cable (3) is provided at the lower end of the winch (2), a lifting water intake head (4) is provided at the lower end of the traction cable (3), a depth sensor (5) is provided at the end face of the lifting water intake head (4), and a filter screen (6) is provided at the lower end of the lifting water intake head (4).

2. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 1, characterized in that: The inner end of the lifting water head (4) is provided with a valve (7), the inner end of the lifting water head (4) is provided with a water temperature sensor (8), the end face of the water tower (1) is provided with a vertical water temperature monitoring chain (9), the side end of the lifting water head (4) is provided with a flexible water delivery hose (10), and the lower end of the flexible water delivery hose (10) is provided with a fixed water outlet pipe (11).

3. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 1, characterized in that: The vertical water temperature monitoring chain (9) consists of multiple water temperature sensors arranged at intervals along the vertical direction, used to monitor and generate vertical water temperature profile data of the reservoir in real time.

4. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 1, characterized in that: The winch (2) is controlled by a central controller, which is configured to receive data from the vertical water temperature monitoring chain (9) and the water temperature sensor (8), and calculate the target depth of the lifting water intake head (4) based on the preset target water temperature.

5. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 4, characterized in that: The central controller dynamically adjusts the operation of the winch (2) by comparing the deviation between the actual water temperature fed back by the water temperature sensor (8) and the preset target water temperature, so that the lifting water head (4) can be finely adjusted in depth.

6. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 1, characterized in that: The lifting head (4) is equipped with a guide mechanism on its lifting path. The guide mechanism is connected to the tower wall of the water intake tower (1) to ensure the stability of the vertical movement of the water intake head.

7. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 2, characterized in that: The opening and closing of the valve (7) is controlled by the central controller, and the opening or closing operation is performed according to the signal of whether the lifting water head (4) has reached the target water intake depth.

8. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 4, characterized in that: The central controller has data recording and storage functions, which are used to continuously record water temperature profile, water intake head depth, water intake temperature and valve status data.

9. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 4, characterized in that: The central controller is configured to automatically trigger an early warning signal and notify management personnel to intervene when the actual water temperature fed back by the water temperature sensor (8) continuously deviates from the preset target water temperature and cannot be effectively corrected by depth fine-tuning.

10. The intelligent stratified water intake device and water temperature control method for high dams and deep reservoirs according to claim 8, characterized in that: The central controller has data communication capabilities, enabling it to remotely transmit recorded water temperature profiles, water intake depth, and equipment status data to the monitoring center, thereby achieving remote monitoring and control.

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