Water environment monitoring device with depth adjusting function

Abstract

The invention provides a water environment monitoring device with depth adjustment, and belongs to the technical field of water environment monitoring equipment, and the device comprises a floating platform which is suspended on a water surface to be monitored and provides buoyancy support for water environment monitoring; the lifting platform is arranged below the floating platform, and a collector for collecting water is fixedly arranged at the lower end of the lifting platform; the shallow layer lifting drive is arranged on the floating platform and is used for driving the lifting platform to lift and move in the shallow layer water body and collecting samples of different depths of the shallow layer water body; the deep-layer lifting drive is arranged on the floating platform and used for driving the lifting platform to lift and move in the deep-layer water body and collecting samples of different depths of the deep-layer water body; the lifting platform is controlled to ascend and descend in a shallow water body and a deep water body through the shallow lifting drive and the deep lifting drive respectively, flexible switching is achieved in combination with the locking mechanism, and therefore the problems that the monitoring depth of a traditional device is fixed, and deep samples cannot be obtained are solved.

Description

Technical Field

[0001] This invention belongs to the technical field of water environment monitoring equipment, specifically a water environment monitoring device with depth adjustment. Background Technology

[0002] Water quality monitoring is a crucial step in environmental science, involving the systematic observation and assessment of the types, concentration distribution, and dynamic evolution of pollutants in water bodies. Its monitoring scope covers complex scenarios such as natural water bodies like rivers, lakes, oceans, and groundwater, as well as industrial wastewater discharge. Traditional water environment monitoring devices generally employ a fixed structural design, rigidly connecting sensor components directly to the bottom of a floating plate or buoy, relying on water buoyancy to suspend and support the device, thereby completing the real-time acquisition of water quality parameters. However, such devices have a significant drawback in practical operation: the immersion depth of the sensor components cannot be dynamically adjusted, resulting in a fixed monitoring height. Because pollutant concentrations in vertical water profiles often vary significantly with depth, and shallow and deep water quality characteristics differ considerably, current technologies can only perform fixed-point monitoring of shallow water bodies, unable to flexibly adjust sampling depth according to actual needs. When obtaining deep water samples, the lack of effective depth adjustment capabilities leads to data acquisition failures in deep water, severely limiting the comprehensiveness and representativeness of monitoring results. This limitation makes existing monitoring systems ill-suited for diverse monitoring tasks in different water depth environments, especially in water bodies with complex pollution distribution, where precise stratified sampling and analysis are impossible. Summary of the Invention

[0003] The purpose of this application is to provide a water environment monitoring device with depth adjustment to solve the problem that traditional devices have a fixed monitoring depth and cannot obtain deep samples. The technical solution adopted by this invention to solve its technical problem is: a water environment monitoring device with depth adjustment, comprising: A floating platform, which is suspended on the water surface to be monitored, provides buoyancy support for water environment monitoring. A monitoring instrument is fixedly installed on the upper end of the floating platform. The lifting platform is located below the floating platform, and a collector for collecting water is fixed at its lower end. The collected water is then injected into the monitoring instrument through a pump pipe. The shallow lifting drive is set on the floating platform and is used to drive the lifting platform to move up and down in the shallow water body to collect samples at different depths in the shallow water body. The deep-sea lifting drive is set on the floating platform and is used to drive the lifting platform to move up and down in deep water to collect samples at different depths. The locking mechanism, which is installed on the floating platform, is used to control the separation and locking of the shallow lifting drive with the lifting platform. Preferably, the upper end of the floating platform is provided with multiple support columns, the interior of the support columns is provided with through holes for installing shallow lifting drives, the top of the multiple sets of support columns is fixedly provided with photovoltaic top plates, and the lower end of the photovoltaic top plates is provided with inverters for converting solar energy into electrical energy to provide power supply for the monitoring instrument. Preferably, the lower end of the floating platform is provided with an installation groove, and a connecting boss is fixedly provided at the center of the bottom of the installation groove. The upper end of the lifting platform is provided with a connecting seat that cooperates with the connecting boss. The lifting platform is positioned after retraction by cooperating with the connecting seat and the connecting boss. Preferably, the shallow lifting drive includes: Two sets of drive plates are fixedly installed on the upper part of the floating platform. Two sets of drive shafts are rotatably installed between the two sets of drive plates. A motor for driving the drive shafts is fixedly installed on the drive plates. Two sets of lifting gears are fixedly installed on the drive shafts. The lifting rod is provided with multiple sets of through holes that are slidably connected in the support sleeve column. The outer periphery of the lifting rod is provided with lifting gear teeth that mesh with the lifting gear. The side wall of the support sleeve column is provided with a sleeve groove for the lifting gear to pass through. The lower end of the lifting rod is fixedly provided with a locking joint that is engaged with the lifting platform. The locking joint is provided with a locking bevel that facilitates rotation and engagement with the lifting platform. Preferably, two sets of transmission shafts are rotatably mounted in the middle of the drive plate. Each set of transmission shafts is fixedly connected with a transmission gear and a belt drive. The two sets of transmission gears are meshed and connected, and the two sets of belt drives are respectively connected to the drive shafts on the same side, so that one set of motors can drive the two sets of drive shafts to rotate synchronously in opposite directions. Preferably, the deep lifting drive includes two sets of cable shafts rotatably mounted between two sets of drive plates, and a second motor for driving the cable shafts to rotate is fixedly mounted on the drive plates. The two sets of cable shafts are connected by a belt drive. A cable connecting seat is fixedly provided in the middle of the cable shaft. Lifting cables are fixedly connected to both ends of the cable connecting seat. The lifting cables are tied to the cable shaft, and the end of the lifting cable away from the cable connecting seat passes through the floating platform and is connected to the lifting platform. The floating platform is provided with a cable through hole for the lifting cable to pass through, and a cable support plate connected to the lifting cable is provided at the upper end of the lifting platform. Preferably, the upper end of the lifting platform is fixedly provided with a plurality of lock head slots that cooperate with the lock connector. The bottom of the lock head slot is provided with a lock head rotating groove for the lock connector to rotate and engage. The side wall of the lock head rotating groove and the side wall of the connecting seat are both provided with drainage holes for drainage. Preferably, the bottom of the lock head rotating groove is provided with a spring groove, a compression spring is fixedly connected in the spring groove, a compression plate is connected to the upper end of the compression spring, and the compression plate is slidably connected in the lock head rotating groove. The lock head is pressed into the lock head rotating groove by the elastic action of the compression spring. Preferably, the locking mechanism includes multiple sets of rotating sleeves, the rotating sleeves are rotatably installed on the lower outer periphery of the support sleeve column that extends into the mounting groove, the inner side of the rotating sleeve is provided with a limit block, the lifting rod is slidably connected in the rotating sleeve, and the lifting rod is provided with a limit groove along the axial side wall that slides with the limit block; When it is necessary to separate the lock connector from the lock cylinder slot, rotate the rotating sleeve. The limiting block inside the rotating sleeve drives the lifting rod to rotate, so that the lock connector rotates to be aligned with the lock cylinder slot. Then, the lifting rod moves upward under the drive of the lifting gear, thus separating the lock connector from the lifting platform. When it is necessary to fix the lifting rod to the lifting platform, the lifting rod first moves downward under the drive of the lifting gear, and the locking connector is inserted into the lock head slot. Then, the rotating sleeve is rotated and the lifting rod is driven to rotate through the limiting block on the inner side of the rotating sleeve, so that the locking connector rotates and is misaligned with the lock head slot. The locking connector is used to achieve a fixed connection between the shallow lifting drive and the lifting platform. Preferably, the locking mechanism further includes a locking motor fixedly installed on the top of the floating platform and a geared shaft sleeve fixedly installed in the mounting groove. A locking gear is fixedly installed on the output shaft of the locking motor. An external geared disk that meshes with the locking gear is rotatably installed on the outer periphery of the geared shaft sleeve. Connecting geared disks that mesh with the external geared disks are fixedly provided on the outer periphery of multiple sets of rotating sleeves. Synchronous drive of the rotation of multiple sets of lifting rods is achieved through a locking motor. The beneficial effects of this invention are as follows: by controlling the lifting and lowering movement of the lifting platform in shallow and deep water bodies through shallow lifting drive and deep lifting drive respectively, and by combining the locking mechanism to achieve flexible switching, the problem of fixed monitoring depth and inability to obtain deep samples in traditional devices is solved. It has the advantages of being able to flexibly adjust the sampling depth, realize stratified sampling, and improve the comprehensiveness and representativeness of monitoring. Attached Figure Description The invention will now be further described with reference to the accompanying drawings. Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the entire invention; Figure 3 This is a schematic diagram of the bottom isometric structure of the entire invention; Figure 4 This is a top view of the overall structure of the invention; Figure 5 This is the present invention. Figure 4A schematic diagram of the cross-sectional structure along axis AA; Figure 6 This is a schematic diagram of the shallow lifting drive structure of the present invention; Figure 7 This is a three-dimensional structural diagram of the floating platform of the present invention; Figure 8 This is a three-dimensional structural diagram of the lifting platform of the present invention; Figure 9 This is the present invention. Figure 8 Schematic diagram of the cross-sectional structure in the middle BB direction; Figure 10 This is a schematic diagram of the locking mechanism of the present invention. In the diagram: 1. Floating platform; 101. Cable through hole; 102. Connecting boss; 2. Support sleeve column; 21. Sleeve column groove; 3. Photovoltaic roof panel; 4. Monitoring instrument; 5. Lifting platform; 51. Lock head slot; 52. Lock head rotating groove; 53. Cable support plate; 54. Connecting seat; 55. Drainage hole; 56. Spring groove; 57. Extrusion plate; 58. Extrusion spring; 6. Data collector; 7. Shallow lifting drive; 71. Drive plate; 72. Motor 1; 73. Drive shaft; 74. Lifting gear; 75. Transmission... 76. Drive shaft; 77. Transmission gear; 78. Belt drive one; 79. Lifting rod; 70. Lifting wheel teeth; 71. Limiting slot; 72. Locking connector; 73. Locking inclined surface; 84. Deep lifting drive; 85. Motor two; 86. Cable shaft; 97. Belt drive two; 88. Lifting cable; 99. Cable connecting seat; 90. Locking mechanism; 91. Locking motor; 92. Locking gear; 93. External gear disc; 94. Gear disc bushing; 95. Rotating sleeve; 96. Connecting gear disc; 97. Limiting block. Detailed Implementation To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Traditional water environment monitoring devices typically have their sensor components directly fixed to the bottom of a floating board or buoy. This makes it difficult to adjust the device's position within the water, thus limiting the ability to adjust the monitoring height. Different water layers at different depths exhibit varying levels of pollution, necessitating adjustments to the monitoring height based on actual conditions. However, existing monitoring devices are only capable of monitoring shallower water layers and cannot perform sampling when monitoring deeper water bodies is required. For this, please refer to Figures 1-10 As shown, this embodiment of the invention provides a water environment monitoring device with depth adjustment. The device, by setting up a floating platform 1, a lifting platform 5, a shallow lifting drive 7, a deep lifting drive 8, and a locking mechanism 9, realizes flexible adjustment of the monitoring height of the water environment monitoring device and can sample deep water, thereby overcoming the problem of limited monitoring depth in the prior art. The floating platform 1 is configured to float on the surface of the water to be monitored, providing the buoyancy support required for aquatic environment monitoring. In a preferred embodiment, the floating platform 1 can be made of a material with good buoyancy, such as a hollow structure or a shell filled with lightweight foam material. The monitoring instrument 4 is fixedly mounted on the upper end of the floating platform 1. In other optional embodiments, the floating platform 1 is equipped with a GPS+BeiDou dual-mode positioning module and an attitude sensor (not shown in the figure), which can provide real-time and accurate feedback on the device's geographical coordinates and the floating platform's tilt angle in the water. Through a built-in intelligent algorithm, the system can automatically correct the lifting trajectory of the lifting platform 5 based on the data fed back by the attitude sensor, effectively offsetting device displacement caused by wind and waves, avoiding deviations in sampling depth, and ensuring the positional accuracy of sampling points at each depth. Simultaneously, a foldable stabilizing wing structure is added to the bottom of the floating platform 1. When the stabilizing wing is deployed during monitoring operations, it significantly increases the underwater force-bearing area, enhances the device's anti-interference capability in windy and wave environments, and improves overall stability. During transportation or deployment, the stabilizing wing can be retracted, without occupying additional space, facilitating the handling and deployment of the equipment, thus balancing operational stability and ease of use. A lifting platform 5 is positioned below the floating platform 1. A water sampler 6 is fixedly mounted at its lower end. The collected water is injected into the monitoring instrument 4 via a pump pipe. In a preferred embodiment, the lifting platform 5 can be a frame structure connected to the floating platform 1 via guide rods or slide rails to ensure the stability of its vertical movement. In another alternative embodiment, the data collector 6 has undergone a core functional upgrade, integrating multi-parameter sensors such as pH, dissolved oxygen, turbidity, and heavy metal ions. This eliminates the traditional method of pumping water samples through pipes, enabling in-situ real-time detection of water parameters. This design allows the sensors to directly contact the water body, eliminating the need to extract water samples to the monitoring instrument 4 on the floating platform 1. This fundamentally avoids problems such as pipe contamination, temperature changes, or component evaporation that may occur during water sample transmission, significantly improving the authenticity and accuracy of the monitoring data. Simultaneously, it simplifies the device structure and reduces pump maintenance costs. A shallow-water lifting drive 7 is mounted on the floating platform 1 to drive the lifting platform 5 to move up and down within the shallow water body, thereby collecting samples at different depths. In a preferred embodiment, the shallow-water lifting drive 7 may include an electric winch mounted on the floating platform 1, connected to the lifting platform 5 via a wire rope or chain, and its rotation controlled by a motor to achieve vertical movement of the lifting platform 5. A deep-water lifting drive 8 is mounted on the floating platform 1 to drive the lifting platform 5 to move up and down within the deep water body, collecting samples at different depths. In a preferred embodiment, the deep-water lifting drive 8 can be a stand-alone electric winch system with a longer cable and greater torque output to accommodate the lifting requirements of deep water bodies. This winch system is also mounted on the floating platform 1 and connected to the lifting platform 5 via a cable. A locking mechanism 9 is mounted on the floating platform 1 to control the separation and locking of the shallow lifting drive 7 and the lifting platform 5. In a preferred embodiment, the locking mechanism 9 can be a manually operated pin mechanism. When the shallow lifting drive 7 needs to be separated from the lifting platform 5, the operator can manually pull out the pin to release the mechanical connection between the two; when locking is required, the pin is inserted into the corresponding hole to achieve a fixed connection. The water environment monitoring device with depth adjustment proposed in this application achieves flexible adjustment of the monitoring height through the stable support provided by the floating platform 1 and the coordinated action of the lifting platform 5, the shallow lifting drive 7, the deep lifting drive 8, and the locking mechanism 9. Therefore, this device can collect samples at different depths in shallow and deep water bodies according to actual monitoring needs, effectively solving the problems of existing monitoring devices being unable to adjust the monitoring height and collect deep water samples, thus improving the comprehensiveness and adaptability of water environment monitoring. In addition, the device is equipped with a depth preset function, allowing users to preset multiple different sampling depth points via the control terminal. Once the device is started, it automatically controls the shallow lifting drive 7 or the deep lifting drive 8 to operate in a preset sequence without manual intervention, driving the lifting platform 5 to each preset depth point to complete sampling. This completely changes the traditional manual depth adjustment operation mode. This automated layered sampling design not only reduces the intensity of manual operation but also avoids human error, significantly improving the efficiency of monitoring operations, and is particularly suitable for large-scale, multi-depth systematic water quality monitoring tasks. In other optional embodiments, the floating platform 1 is equipped with an Internet of Things (IoT) communication module (not shown in the figure). This IoT communication module establishes a remote control and data transmission system, replacing the traditional local operation mode. Users can remotely control the device's depth adjustment, sampling start / stop, and other operations via a cloud platform or mobile terminal, issuing work instructions without needing to be physically present at the monitoring site. Simultaneously, monitoring data can be transmitted back to the cloud in real time via the IoT module, allowing users to view real-time monitoring results at any time. The system also features equipment fault warning functionality; when abnormalities occur in drive components, sensors, or the power supply system, it will promptly send warning information to the user, facilitating rapid troubleshooting and maintenance. Regarding data storage and analysis, the device can locally store more than one year's worth of monitoring data. The cloud platform can integrate and analyze historical data to generate water quality depth distribution curves, visually presenting the water quality change trends at different depths, providing comprehensive and accurate data support for water environment assessment and decision-making. When multi-depth sampling of shallow water in a lake is required, the shallow lifting drive 7 comes into play. The shallow lifting drive 7 is mounted on a floating platform 1, and its core components include two sets of drive plates 71 fixedly mounted on the upper end of the platform 1. Two sets of drive shafts 73 are rotatably mounted between the two sets of drive plates 71, driven by a motor 72 fixedly mounted on the drive plates 71. The motor 72 drives the two sets of drive shafts 73 to rotate synchronously in opposite directions via a transmission shaft 75, a transmission gear 76, and a belt drive 77, ensuring the smoothness of the lifting action. Two sets of lifting gears 74 are fixedly mounted on the drive shafts 73. Multiple lifting rods 78 are slidably connected in through holes inside the support sleeve 2, and their outer circumference is provided with lifting gear teeth 781 that mesh with the lifting gears 74. The side wall of the support sleeve 2 is provided with sleeve grooves 21 for the lifting gears 74 to pass through. When the motor 72 starts, the lifting gears 74 drive the lifting rods 78 to move up and down within the support sleeve 2. A lifting platform 5 is positioned below the floating platform 1, with a water sampler 6 fixedly mounted at its lower end. To enable multi-depth monitoring of shallow water, multiple lock slots 51, which mate with the locking connector 79, are fixedly mounted at the upper end of the lifting platform 5. The bottom of each lock slot 51 has a lock groove 52 for the locking connector 79 to rotate and engage. A spring groove 56 is also provided at the bottom of the lock groove 52, with a compression spring 58 fixedly connected inside. A compression plate 57 is connected to the upper end of the compression spring 58 and slidably connected within the lock groove 52. Through the elastic action of the compression spring 58, the locking connector 79 can be pressed tightly into the lock groove 52, ensuring a stable connection. Drainage holes 55 are provided on the side walls of both the lock groove 52 and the connecting seat 54 to facilitate the drainage of accumulated water. When the lifting platform 5 needs to be connected to the shallow lifting drive 7, the lifting rod 78 moves downward under the drive of the lifting gear 74, and the locking connector 79 is inserted downward into the locking head slot 51. Subsequently, the locking mechanism 9 is activated. The locking mechanism 9 includes multiple sets of rotating sleeves 95, which are rotatably mounted on the lower outer periphery of the support sleeve column 2 that extends into the mounting groove. A limit block 97 is provided on the inner side of the rotating sleeve 95, the lifting rod 78 is slidably connected in the rotating sleeve 95, and the lifting rod 78 is provided with a limit groove 782 along the axial side wall that slides with the limit block 97. The locking mechanism 9 also includes a locking motor 91 fixedly mounted on the top of the floating platform 1, and a locking gear 92 is fixedly mounted on its output shaft. An external gear disk 93 that meshes with the locking gear 92 is rotatably mounted on the outer periphery of the gear disk bushing 94 fixedly mounted in the mounting groove. A connecting gear disk 96 that meshes with the external gear disk 93 is fixedly provided on the outer periphery of the multiple sets of rotating sleeves 95. When the locking motor 91 starts, it synchronously drives multiple sets of rotating sleeves 95 through the locking gear 92, external gear disc 93, and connecting gear disc 96. The rotating sleeves 95 rotate, causing the lifting rod 78 to rotate via the limiting block 97 on their inner side. This causes the locking connector 79 to rotate and disengage from the locking slot 51, thus achieving a fixed connection between the shallow lifting drive 7 and the lifting platform 5 through the locking connector 79. At this time, the lifting platform 5, driven by the shallow lifting drive 7, can automatically complete stratified sampling according to preset shallow water depth points, collecting water samples at different depths. This method of synchronously driving multiple sets of lifting rods through gears and gear discs, combined with the rapid response of the electromagnetic clutch, significantly improves the convenience and synchronization of operation. After shallow water monitoring is completed, if monitoring of deeper water is required, the shallow lifting drive 7 is quickly separated from the lifting platform 5 via an electromagnetic clutch, and then the deep lifting drive 8 is activated. First, the electromagnetic clutch of the locking mechanism 9 is de-energized, and the rotating sleeve 95 is rotated. The limiting block 97 on the inner side of the rotating sleeve 95 drives the lifting rod 78 to rotate, causing the locking joint 79 to rotate until it is aligned with the lock slot 51. Subsequently, the lifting rod 78 moves upward under the drive of the lifting gear 74, achieving separation between the locking joint 79 and the lifting platform 5. The deep-sea lifting drive 8 includes two sets of cable shafts 82 rotatably mounted between two sets of drive plates 71. A second motor 81 for driving the cable shafts 82 is fixedly mounted on the drive plates 71. The two sets of cable shafts 82 are connected by a belt drive 83 to ensure synchronous operation. A cable connecting seat 85 is fixedly installed in the middle of the cable shaft 82. Lifting cables 84 are fixedly connected to both ends of the cable connecting seat 85. The lifting cables 84 are tied to the cable shaft 82, and the end of the lifting cable 84 away from the cable connecting seat 85 passes through the cable through hole 101 on the floating platform 1 and connects to the cable support plate 53 at the upper end of the lifting platform 5. When the second motor 81 starts, the cable shaft 82 rotates, raising and lowering the lifting cables 84, thereby driving the lifting platform 5 to automatically rise and fall in the deep water according to a preset depth point, collecting samples at different depths in the deep water. During this process, the GPS+BeiDou dual-mode positioning module and attitude sensor provide real-time data feedback, the algorithm automatically corrects the lifting trajectory, and the foldable stabilizing wing ensures the stability of the device during deep-sea operations, ensuring accurate sampling depth. In some of the solutions described above in this application, a depth adjustment device is proposed to collect water samples at different depths. However, in this process, the device requires electricity to drive the monitoring instrument and lifting mechanism. If it relies on an external power source or battery, it may lead to unstable power supply, difficulty in replacement, or increased maintenance costs, affecting the continuous operation of the device and the long-term monitoring effect. In response, this application proposes a water environment monitoring device with depth adjustment, which has multiple support columns 2 at the upper end of the floating platform 1. The support columns 2 have through holes for installing shallow lifting drive 7. A photovoltaic top plate 3 is fixedly installed on the top of the multiple sets of support columns 2. An inverter is installed at the lower end of the photovoltaic top plate 3 to convert solar energy into electrical energy to provide power to the monitoring instrument 4. Specifically, the support sleeve 2 is a structural component installed on the upper end of the floating platform 1. Its main function is to provide a stable support point and installation space for the device. The installation of multiple support sleeves 2 can distribute the load, enhance the overall stability of the upper structure of the floating platform 1, and provide multi-point support for the subsequent installation of other components. The support sleeves 2 can be hollow cylindrical, square, or polygonal in shape, and the material can be corrosion-resistant engineering plastics or lightweight metals to adapt to long-term use in aquatic environments. They can be fixed to the upper end of the floating platform 1 by welding, bolting, or integral molding. The support sleeve 2 has a through-hole inside, which is a channel running through the interior of the support sleeve 2. Its function is to provide a protected installation and operating space for the shallow lifting drive 7. Installing the shallow lifting drive 7 inside the through-hole can effectively prevent it from being directly exposed to the water surface environment or external impacts, thereby extending its service life and improving operational reliability. The shape and size of the through-hole should match the structure of the shallow lifting drive 7. For example, if the shallow lifting drive 7 includes a lifting rod, the through-hole can be circular or square to ensure smooth sliding of the lifting rod within it. The inner wall of the through hole can be smoothed or a guide bushing can be installed to reduce friction. A photovoltaic (PV) roof panel 3 is fixedly installed on the top of multiple sets of support columns 2. The PV roof panel 3 is a device that converts solar energy into electrical energy. It is fixed to the top of the support columns 2 to maximize the reception of solar radiation. By placing the PV roof panel 3 at the highest point of the installation, it avoids being blocked by water waves or the surrounding environment, ensuring efficient power generation. The PV roof panel 3 can be composed of monocrystalline silicon, polycrystalline silicon, or thin-film solar panels, and its surface can be covered with a weather-resistant transparent protective layer. It can be fixed using bolt connections, snap-fit ​​connections, or adhesive bonding, ensuring a certain tilt angle to optimize solar energy absorption efficiency and facilitate rainwater self-cleaning. An inverter is installed at the lower end of the PV roof panel 3. The inverter is a power electronic device whose core function is to convert the direct current (DC) generated by the PV roof panel 3 into alternating current (AC), or to regulate the DC power to meet the power supply requirements of the monitoring instrument 4. The inverter ensures that the monitoring instrument 4 receives a stable and reliable power supply, enabling its continuous operation. The inverter can be grid-connected or off-grid type, depending on the specific power requirements of the monitor 4 and the system design. It can be integrated on the back of the photovoltaic roof panel 3 or installed separately in a waterproof box inside the floating platform 1. The inverter usually also has maximum power point tracking to optimize solar conversion efficiency and may include safety features such as overvoltage, overcurrent, and short circuit protection. Through the above technical solution, this application forms an integrated solar power supply system by setting multiple support columns 2 on the upper end of the floating platform 1, fixing a photovoltaic roof panel 3 on its top, and setting an inverter at the lower end of the photovoltaic roof panel 3. When the device monitors the water surface, the photovoltaic roof panel 3 can continuously receive solar radiation and convert it into direct current. Subsequently, the inverter converts the direct current into stable power required by the monitoring instrument 4. This self-sufficient power supply method effectively solves the problems of unstable power supply, high maintenance costs, and limited long-term operation caused by the reliance on external power sources or frequent battery replacements in traditional water environment monitoring devices. Combining the buoyancy support provided by the floating platform 1, the water environment monitoring by the monitoring instrument 4, and the basic functions of shallow lifting drive 7 and deep lifting drive 8 to achieve water sampling at different depths, this solution, by introducing solar power, enables the entire water environment monitoring device to have stronger autonomy and continuous operation capabilities. The support columns 2 not only provide a stable installation foundation for the photovoltaic roof panel 3, but their internal through holes also cleverly provide protective installation space for the shallow lifting drive 7, optimizing the structural layout. This design allows the device to continuously obtain power without human intervention in remote waters or long-term unattended monitoring scenarios, thus ensuring the stable operation of the monitor 4 and the lifting mechanism, greatly improving the efficiency and reliability of water environment monitoring, and reducing operating costs. In some of the embodiments described above in this application, a lifting platform is proposed for collecting water. However, in its implementation, the lifting platform lacks a reliable positioning mechanism after retraction, which may lead to positional deviation or instability, affecting the overall performance of the device. In response, this application further proposes a water environment monitoring device with depth adjustment; please refer to [link to relevant documentation]. Figures 3-9 As shown, the lower end of the floating platform 1 is provided with an installation groove, and a connecting boss 102 is fixedly provided at the center of the bottom of the installation groove. The upper center of the lifting platform 5 is provided with a connecting seat 54 that cooperates with the connecting boss 102. The lifting platform 5 is positioned after retraction by cooperating with the connecting seat 54 and the connecting boss 102. Specifically, the lower end of the floating platform 1 is provided with a mounting groove. This mounting groove refers to an indented space or structure formed at the bottom of the floating platform 1. Its main function is to accommodate part or all of the structure of the lifting platform 5 in the retracted state, and to provide a mounting base and protection for the subsequent positioning mechanism. This groove can be a structure integrally formed on the lower end of the floating platform 1, such as by injection molding or casting; it can also be an independent cavity or box-shaped structure attached to the lower end of the floating platform 1 by welding, bolting, or other methods; or it can be one or more holes or slots formed at the lower end of the floating platform 1 by machining (such as milling or drilling). A connecting boss 102 is fixedly provided at the center of the bottom of the mounting groove. The connecting boss 102 is a structure that protrudes downward from the center of the bottom of the mounting groove. It serves as the core alignment and connection point after the lifting platform 5 is retracted into place, ensuring that the center position of the lifting platform 5 is accurately fixed. The connecting boss 102 can be a cylindrical or conical protrusion, firmly fixed to the center of the groove by means of threads, welding, or riveting; it can also be a square or polygonal protrusion, integrally formed with the bottom of the groove to provide stronger torsional resistance; or it can be a boss with an elastic or self-locking mechanism, such as a structure with barbs or buckles, to enhance the stability of the connection. The upper center of the lifting platform 5 is provided with a connecting seat 54 that mates with the connecting boss 102. The connecting seat 54 is a structure located at the upper center of the lifting platform 5, capable of mechanically engaging with the connecting boss 102. Its function is to receive and fix the connecting boss 102, thereby accurately positioning the lifting platform 5 below the floating platform 1. The connecting seat 54 can be a groove or hole matching the shape of the connecting boss 102, such as a cylindrical or conical hole, achieving positioning through a tight fit; it can also be a seat with a buckle, clamping mechanism, or thread, capable of actively or passively locking the connecting boss 102 when it is inserted; or it can be designed with a guide bevel or chamfer to facilitate the smooth insertion and alignment of the connecting boss 102. The lifting platform 5 is positioned after retraction by the engagement of the connecting seat 54 and the connecting boss 102. This engagement refers to a mechanical connection between the connecting seat 54 and the connecting boss 102, used to fix the lifting platform 5 in a preset position when it is fully retracted. The engagement can be a clearance fit, where the connecting boss 102 is inserted into the connecting seat 54, and the friction or gravity between the two achieves initial positioning, supplemented by other locking mechanisms; the engagement can also be an interference fit or a tight fit, where a certain clamping force is generated between the two after the connecting boss 102 is inserted into the connecting seat 54, thereby achieving stable positioning; or the engagement can be a structure with self-locking or clamping functions, such as the connecting boss 102 being automatically locked by a spring pin, rotating buckle, or magnetic attraction after being inserted into the connecting seat 54, ensuring the reliability of positioning. Through the above technical solution, when the lifting platform 5 retracts below the floating platform 1, the connecting boss 102 can be precisely inserted into the connecting seat 54, achieving center alignment and stable fixation of the lifting platform 5. This cooperation mechanism effectively solves the problems of inaccurate positioning, positional deviation, or shaking that may occur after the lifting platform 5 retracts, ensuring the stability and reliability of the device in non-working state. At the same time, this positioning method has a simple structure and is easy to operate, effectively protecting the lifting platform 5 and its mounted collector 6 from external impacts or water flow disturbances, thereby extending the service life of the device and preparing for the next accurate water sampling. In some of the solutions described above in this application, a shallow lifting drive is proposed to drive the lifting platform to move up and down in shallow water. However, in this process, an efficient and stable driving mechanism is needed to accurately control the lifting motion of the lifting rod and ensure its reliable connection with the lifting platform, so as to avoid sampling failure or data error caused by unstable connection or disconnection during the sampling process. In response, this application further proposes a water environment monitoring device with depth adjustment; please refer to [link to relevant documentation]. Figures 3-9 As shown, the shallow lifting drive 7 includes: two sets of drive plates 71 fixedly installed on the upper end of the floating platform 1, two sets of drive shafts 73 rotatably installed between the two sets of drive plates 71, a motor 72 for driving the drive shafts 73 to rotate fixedly installed on the drive plates 71, and two sets of lifting gears 74 fixedly installed on the drive shafts 73; a lifting rod 78, which is provided with multiple sets of through holes in the support sleeve column 2, the outer periphery of the lifting rod 78 is provided with lifting gear teeth 781 that mesh with the lifting gears 74, and the side wall of the support sleeve column 2 is provided with sleeve grooves 21 for the lifting gears 74 to pass through, and the lower end of the lifting rod 78 is fixedly provided with a locking joint 79 that engages with the lifting platform 5, and the locking joint 79 is provided with a locking inclined surface 791 that facilitates rotation and locking into the lifting platform 5. A locking bevel 791 is provided on the locking connector 79 to facilitate rotational engagement with the lifting platform 5. The locking bevel 791 can be designed as a smooth bevel to guide the locking connector 79 smoothly into or out of the locking structure of the lifting platform 5 during rotation; or it can be designed as a conical surface with a specific angle to provide a tighter fit and stronger locking force during engagement. Through the above technical solution, the drive plate 71, fixedly installed on the upper end of the floating platform 1, provides a solid installation foundation for the entire shallow lifting drive 7, ensuring the stable operation of the drive components in the aquatic environment. Motor 72 drives the drive shaft 73 to rotate, and through the precise meshing of the lifting gear 74 with the lifting gear teeth 781 on the lifting rod 78, the rotational motion is efficiently converted into the linear lifting motion of the lifting rod 78. This rack and pinion transmission method enables high-precision control of the position of the lifting rod 78, thereby ensuring accurate depth adjustment of the lifting platform 5 in shallow water and avoiding sampling depth deviations caused by inaccurate drive. Simultaneously, the lifting rod 78 is slidably connected in the through hole within the support sleeve 2, and with the help of the sleeve groove 21 on the side wall of the support sleeve 2, the lifting gear 74 can smoothly pass through and mesh with the lifting gear teeth 781, effectively preventing the lifting rod 78 from shaking or jamming during the lifting process, ensuring the smoothness and reliability of the lifting motion. Furthermore, the locking connector 79 and its locking bevel 791 at the lower end of the lifting rod 78 enable a quick, secure, and separable connection between the lifting rod 78 and the lifting platform 5. This design not only simplifies the assembly and maintenance of the device, but more importantly, ensures a stable and reliable connection between the lifting platform 5 and the lifting rod 78 during sampling. This effectively avoids sampling failures or data errors caused by unstable connections or accidental disconnection, thereby significantly improving the efficiency and accuracy of shallow water monitoring. In some of the embodiments described above in this application, a shallow lifting drive is proposed to drive the lifting platform to move up and down in shallow water. However, in its implementation, using multiple independent motors or complex mechanical structures to achieve synchronous counter-rotation of two sets of drive shafts may increase the complexity, cost and failure risk of the device, resulting in asynchronous or unstable lifting operations, which affects the accuracy and efficiency of water sample collection. In response, this application further proposes a water environment monitoring device with depth adjustment; please refer to [link to relevant documentation]. Figures 3-9 As shown, two sets of transmission shafts 75 are rotatably mounted in the middle of the drive plate 71. Transmission gears 76 and belt drives 77 are fixedly connected to both sets of transmission shafts 75. The two sets of transmission gears 76 are meshed and connected, and the two sets of belt drives 77 are respectively connected to the drive shafts 73 on the same side, so that one set of motors 72 can drive the two sets of drive shafts 73 to rotate synchronously in opposite directions. Through the above technical solution, the single rotational power of motor 72 is used to achieve the opposite rotation of two sets of drive shafts 75 through the meshing of transmission gear 76, and then the reverse rotational power is transmitted to the drive shafts 73 on the same side through belt drive 77. This design allows only one set of motor 72 to drive the synchronous reverse rotation of two sets of drive shafts 73, thus effectively avoiding the increased complexity, manufacturing cost, and potential failure risks associated with using multiple independent motors or more complex mechanical structures. This transmission mechanism simplifies the overall structure of the shallow water lifting drive 7, reduces the number of moving parts, and improves the reliability and stability of the system. At the same time, the precise cooperation of gears and belt drives ensures that the two sets of drive shafts 73 maintain a high degree of synchronization and coordination during lifting, avoiding tilting or jamming of the lifting platform 5 when moving in shallow water, thereby ensuring the accuracy and efficiency of water sample collection. In some of the embodiments described above in this application, a deep-sea lifting drive is proposed to drive the lifting platform to move up and down in deep water. However, in this process, the lack of an effective synchronization mechanism may cause the lifting platform to move unstably or tilt, affecting the accuracy of water sample collection and the reliability of the device. In response, this application further proposes a water environment monitoring device with depth adjustment; please refer to [link to relevant documentation]. Figures 3-9 As shown, the deep lifting drive 8 includes two sets of cable shafts 82 rotatably mounted between two sets of drive plates 71, and a motor 81 for driving the cable shafts 82 to rotate is fixedly mounted on the drive plates 71. The two sets of cable shafts 82 are connected by a belt drive 83. A cable connecting seat 85 is fixedly provided in the middle of the cable shaft 82. Lifting cables 84 are fixedly connected to both ends of the cable connecting seat 85. The lifting cables 84 are tied to the cable shafts 82, and the end of the lifting cable 84 away from the cable connecting seat 85 passes through the floating platform 1 and is connected to the lifting platform 5. The floating platform 1 is provided with a cable through hole 101 for the lifting cable 84 to pass through, and the upper end of the lifting platform 5 is provided with a cable support plate 53 connected to the lifting cable 84. Through the above technical solution, this application effectively solves the synchronization problem that may occur during the lifting and lowering of the platform in deep water, significantly improving the accuracy of water sample collection and the reliability of the device. Specifically, motor 81 drives the two sets of cable shafts 82 to rotate, and belt drive 83 enables the two sets of cable shafts 82 to rotate synchronously in opposite directions, ensuring that the lifting cables 84 are extended and retracted at the same speed and direction. This synchronization mechanism enables the lifting platform 5 to maintain stable vertical movement in deep water, avoiding tilting or jamming caused by uneven tension on both sides. The lifting cables 84 are firmly tied to the cable shafts 82 through cable connecting seats 85, and pass through the cable through holes 101 on the floating platform 1, connecting to the cable support plate 53 on the lifting platform 5, forming a stable and reliable transmission path. The design of the cable support plate 53 further ensures that the tension of the lifting cable 84 can be evenly distributed on the lifting platform 5, so that the lifting platform 5 always maintains a horizontal posture during the entire deep water body collection process, ensuring that the collector 6 can accurately collect water samples at different depths, which greatly improves the accuracy and efficiency of deep water body monitoring. In some of the embodiments described above in this application, a locking mechanism is proposed for controlling the separation and locking of the shallow lifting drive and the lifting platform. However, during its implementation, when the locking connector is rotated and inserted into the lock head slot, water may remain in the slot or rotating groove, resulting in an unstable locking, equipment corrosion, or operational failure. In response, this application further proposes a water environment monitoring device with depth adjustment; please refer to [link to relevant documentation]. Figure 1 and Figure 9 As shown, the upper end of the lifting platform 5 is fixedly provided with a plurality of lock head slots 51 that cooperate with the lock connector 79. The bottom of the lock head slot 51 is provided with a lock head rotating groove 52 for the lock connector 79 to rotate and engage. The side wall of the lock head rotating groove 52 and the side wall of the connecting seat 54 are both provided with drainage holes 55 for drainage. To address the issue of water residue, drainage holes 55 are provided on the side walls of the lock cylinder groove 52 and the connecting seat 54. The drainage holes 55 are perforated structures on the side walls of the lock cylinder groove 52 and the connecting seat 54. Their main function is to promptly drain any water that may enter or remain in the lock cylinder slot 51 and lock cylinder groove 52 during the insertion and rotation of the lock connector 79, preventing water accumulation that could lead to corrosion, dirt buildup, or freezing, thereby ensuring the smooth operation and long-term reliability of the locking mechanism 9. The drainage holes 55 can be designed as circular holes of appropriate diameter, positioned below the lowest point of the lock cylinder groove 52 to ensure natural water flow. Alternatively, the drainage holes 55 can be designed as narrow slits, or multiple small holes can be provided on the side walls to increase drainage efficiency. Filter screens can be installed at the openings as needed to prevent debris from entering. Through the above technical solution, the multiple lock slots 51 provided on the upper end of the lifting platform 5 provide precise alignment and insertion points for the locking connector 79, ensuring that the locking connector 79 can accurately enter the lifting platform 5. The lock head rotating groove 52 at the bottom of the lock slot 51 achieves a firm fixation between the locking connector 79 and the lifting platform 5 through a rotational locking mechanism, effectively preventing accidental disengagement during lifting operations. More importantly, drainage holes 55 are provided on the side walls of the lock head rotating groove 52 and the side walls of the connecting seat 54. This design allows any water that may enter or remain in the lock slot 51 and lock head rotating groove 52 during the insertion and rotational locking of the locking connector 79 to be drained in a timely and effective manner. This fundamentally avoids problems such as corrosion of locking components, dirt accumulation, or freezing in low-temperature environments that may be caused by water accumulation, thereby significantly improving the reliability and operational stability of the locking mechanism 9, extending the service life of the device, and ensuring the durability and safety of the connection between the shallow lifting drive 7 and the lifting platform 5. In some of the embodiments described above in this application, a lock head groove is proposed for the lock head to be rotated and snapped in place. However, during its implementation, the lock head may become loose due to water flow impact or device vibration after snapping in place, resulting in unstable connection between the shallow lifting drive and the lifting platform, which affects the reliability of water collection. To address this, this application further proposes an improvement scheme aimed at enhancing the stability of the locking connection. Please refer to [link / reference needed]. Figure 1 and Figure 9 As shown, a spring groove 56 is provided at the bottom of the lock head rotating groove 52. A compression spring 58 is fixedly connected in the spring groove 56. A compression plate 57 is connected to the upper end of the compression spring 58. The compression plate 57 is slidably connected in the lock head rotating groove 52. The lock head 79 is pressed into the lock head rotating groove 52 by the elastic action of the compression spring 58. Furthermore, the compression plate 57 is slidably connected within the lock head slot 52, meaning that the compression plate 57 can move freely vertically within the lock head slot 52. This sliding connection allows the compression plate 57 to adaptively adjust according to the insertion depth of the lock head 79, ensuring that the compression spring 58 can always apply an effective clamping force to the lock head 79, while providing the necessary stroke when the lock head 79 is inserted or withdrawn. The external dimensions of the compression plate 57 can be slightly smaller than the inner wall dimensions of the lock head slot 52, achieving sliding through a clearance fit, and guide ribs or guide grooves can be provided to improve sliding stability; alternatively, the sides of the compression plate 57 can be coated with a low-friction material or fitted with sliding bearings to reduce sliding resistance and ensure smooth movement. Through the above technical solution, when the locking connector 79 is inserted and rotated into place, its bottom will press down the compression plate 57 and the compression spring 58. The compression spring 58, after being compressed, generates an upward reaction force, pushing the compression plate 57 upward, thereby pressing the locking connector 79 tightly against the top inner wall of the lock head groove 52. This elastic clamping mechanism effectively prevents the locking connector 79 from loosening or accidentally disengaging due to external factors such as water flow impact and device vibration, thus significantly improving the stability and reliability of the connection between the shallow lifting drive 7 and the lifting platform 5. This stable connection ensures the accuracy and continuity of the water body collection process, avoiding data deviations or equipment failures caused by unstable connections, thereby improving the operating efficiency and accuracy of the entire water environment monitoring device. The clamping force can be controlled by selecting compression springs 58 with different stiffnesses or adjusting the pre-compression of the springs to adapt to different application scenarios and required locking strength. In some of the embodiments described above in this application, a locking mechanism is proposed to control the separation and locking of the shallow lifting drive and the lifting platform. However, in its implementation, a reliable and efficient mechanism is needed to achieve precise connection and separation between the lifting rod and the lifting platform, so as to avoid connection failure or separation difficulties caused by inaccurate operation, and to ensure smooth execution when switching between shallow and deep monitoring. In response, this application further proposes a water environment monitoring device with depth adjustment; please refer to [link to relevant documentation]. Figure 1 and Figure 10 As shown, the locking mechanism 9 includes multiple sets of rotating sleeves 95. Each rotating sleeve 95 is rotatably mounted on the lower outer periphery of the support sleeve 2, which extends into the mounting groove. A limiting block 97 is provided on the inner side of each rotating sleeve 95. The lifting rod 78 is slidably connected within the rotating sleeve 95, and the lifting rod 78 has a limiting groove 782 along its axial sidewall that slides with the limiting block 97. When it is necessary to separate the lock connector 79 from the lock head slot 52, the rotating sleeve 95 is rotated. The limiting block 97 on the inner side of the rotating sleeve 95 drives the lifting rod 78 to rotate, causing the lock connector 79 to rotate until it is aligned with the lock head slot 51. Driven by the lifting gear 74, the lifting rod 78 moves upward, thus separating the lock connector 79 from the lifting platform 5. When it is necessary to fix the lifting rod 78 to the lifting platform 5, the lifting rod 78 first moves downward under the drive of the lifting gear 74, and the locking connector 79 is inserted downward into the lock head slot 51. Then, the rotating sleeve 95 is rotated and the lifting rod 78 is driven to rotate through the limiting block 97 on the inner side of the rotating sleeve 95, so that the locking connector 79 rotates and is displaced from the lock head slot 51. The fixed connection between the shallow lifting drive 7 and the lifting platform 5 is achieved through the locking connector 79. When it is necessary to separate the lock connector 79 from the lock head slot 52, the unlocking process is driven by an external drive (e.g., a motor-driven rotating sleeve 95). The limiting block 97 drives the lifting rod 78 to rotate, releasing the locking bevel 791 on the lock connector 79 from the lock head slot 52 and aligning it with the lock head slot 51. At this time, the lifting rod 78 can be driven upward by the lifting gear 74 of the shallow lifting drive 7 to pull the lock connector 79 out of the lock head slot 51, thereby achieving complete separation of the shallow lifting drive 7 from the lifting platform 5. When it is necessary to fix the lifting rod 78 to the lifting platform 5, the locking process first involves the lifting rod 78 moving downward under the drive of the lifting gear 74, so that the lock connector 79 is accurately inserted into the lock head slot 51 on the lifting platform 5. Subsequently, by rotating the rotating sleeve 95, the limiting block 97 drives the lifting rod 78 to rotate, causing the locking joint 79 to rotate. Its locking inclined surface 791 forms a locking engagement with the locking head groove 52, thereby firmly fixing the lifting rod 78 (and the shallow lifting drive 7) to the lifting platform 5 together. Through the above technical solution, this application provides a reliable and efficient locking mechanism 9 for achieving precise connection and separation between the shallow lifting drive 7 and the lifting platform 5. Specifically, multiple sets of rotating sleeves 95 are rotatably installed on the lower outer periphery of the support sleeve column 2, and the limiting block 97 on the inner side of the rotating sleeve 95 slides in cooperation with the limiting slot 782 on the lifting rod 78, ensuring precise guidance and stability of the lifting rod 78 during rotation and axial movement. When separation is required, rotating the rotating sleeve 95 drives the lifting rod 78 to rotate, aligning the locking connector 79 with the lock head slot 51, so that under the drive of the lifting gear 74, the locking connector 79 can be smoothly pulled out of the lock head slot 51, achieving rapid separation. When connection is required, the locking connector 79 is first accurately inserted into the lock head slot 51, and then the rotating sleeve 95 is rotated to make the locking connector 79 rotate and offset from the lock head slot 51, forming a firm locking connection, thereby achieving a reliable fixed connection between the shallow lifting drive 7 and the lifting platform 5. This design effectively avoids connection failures or separation difficulties caused by inaccurate operation, significantly improves the smoothness and reliability of operation when switching between shallow and deep monitoring modes, and ensures the stability and efficiency of the water environment monitoring device when sampling water bodies at different depths. In some of the embodiments described above in this application, a locking mechanism 9 is proposed to control the separation and locking of the shallow lifting drive 7 and the lifting platform 5. However, in its implementation, multiple rotating sleeves 95 need to be rotated separately to synchronously drive multiple lifting rods 78, which results in cumbersome operation, poor synchronization, and affects the efficiency and reliability of the device. For this, please refer to Figure 1 and Figure 10As shown, this application further proposes that the locking mechanism 9 also includes a locking motor 91 fixedly installed on the top of the floating platform 1 and a geared shaft sleeve 94 fixedly installed in the mounting groove. A locking gear 92 is fixedly installed on the output shaft of the locking motor 91. An external geared disk 93 that meshes with the locking gear 92 is rotatably installed on the outer periphery of the geared shaft sleeve 94. A connecting geared disk 96 that meshes with the external geared disk 93 is fixedly provided on the outer periphery of multiple sets of rotating sleeves 95. The synchronous drive of the rotation of multiple sets of lifting rods 78 is achieved through a locking motor 91. Through the above technical solution, this application solves the cumbersome and synchronization problems of manually operating multiple rotating sleeves 95 by introducing a centralized drive gear transmission system, thereby improving the efficiency and reliability of the device. Specifically, the locking motor 91 fixedly installed on the top of the floating platform 1 provides a single power source, facilitating centralized control and maintenance; the gear disc bushing 94 fixedly installed in the mounting groove serves as a stable support structure, ensuring the rigidity of the transmission system; the locking gear 92 is fixedly installed on the output shaft of the locking motor 91, converting the motor's rotational motion into gear meshing input; the outer circumference of the gear disc bushing 94 is rotatably mounted with an outer gear disc 93 meshing with the locking gear 92, transmitting rotational motion through meshing to achieve uniform force distribution; the outer circumference of multiple sets of rotating sleeves 95 is fixedly equipped with a connecting gear disc 96 meshing with the outer gear disc 93, synchronously transmitting motion from the outer gear disc to all rotating sleeves 95, avoiding individual operation; finally, a locking motor 91 achieves synchronous drive of the rotation of multiple sets of lifting rods 78, simplifying the operation process and ensuring coordinated action of all lifting rods 78. This centralized and synchronous driving method significantly improves the ease of operation, accuracy, and reliability of the locking mechanism 9 during the separation and locking process between the shallow lifting drive 7 and the lifting platform 5. It effectively avoids synchronization errors and mechanical jamming that may be caused by manual operation or independent driving, thereby improving the operating efficiency and stability of the entire water environment monitoring device. In another alternative embodiment, the locking mechanism 9 is replaced by an electromagnetic clutch integrated locking mechanism (not shown in the figure), replacing the traditional purely mechanical locking method. The electromagnetic clutch achieves power transmission and disengagement through the principle of electromagnetic induction, with a response speed reaching millisecond levels. This enables rapid switching between locking and disengagement between the shallow lifting drive 7 and the lifting platform 5, significantly improving the efficiency of switching between shallow and deep driving modes. Simultaneously, the electromagnetic drive reduces hard contact and friction between mechanical components, lowers mechanical wear, extends the service life of the locking mechanism, reduces equipment maintenance frequency, and ensures the continuity of long-term monitoring operations. The following example will provide a more detailed explanation of the above technical solution: In a large lake area, users need to conduct long-term, continuous environmental monitoring of water at different depths to assess water quality and track the vertical distribution of pollutants. Traditional monitoring equipment can usually only monitor at a fixed depth near the water surface, which cannot meet the needs for refined monitoring of deep water or different shallow depths. In this example, a water environment monitoring device with depth adjustment is deployed. The device's floating platform 1 is suspended on the lake surface, providing stable buoyancy support for the entire system. A monitoring instrument 4 is fixedly mounted on the upper end of the floating platform 1 to receive and analyze water sample data. To ensure the long-term autonomous operation of the monitoring device, multiple support columns 2 are installed on the upper end of the floating platform 1, with photovoltaic panels 3 fixedly mounted on their tops. The photovoltaic panels 3 integrate solar cells, converting solar energy into electrical energy, and providing a continuous power supply to the monitoring instrument 4 and other drive components via an inverter, avoiding the hassle of frequent battery replacements or external power supply. When multi-depth sampling of shallow water in a lake is required, the shallow lifting drive 7 comes into play. The shallow lifting drive 7 is mounted on a floating platform 1, and its core components include two sets of drive plates 71 fixedly mounted on the upper end of the platform 1. Two sets of drive shafts 73 are rotatably mounted between the two sets of drive plates 71, driven by a motor 72 fixedly mounted on the drive plates 71. The motor 72 drives the two sets of drive shafts 73 to rotate synchronously in opposite directions via a transmission shaft 75, a transmission gear 76, and a belt drive 77, ensuring the smoothness of the lifting action. Two sets of lifting gears 74 are fixedly mounted on the drive shafts 73. Multiple lifting rods 78 are slidably connected in through holes inside the support sleeve 2, and their outer circumference is provided with lifting gear teeth 781 that mesh with the lifting gears 74. The side wall of the support sleeve 2 is provided with sleeve grooves 21 for the lifting gears 74 to pass through. When the motor 72 starts, the lifting gears 74 drive the lifting rods 78 to move up and down within the support sleeve 2. A locking connector 79 is fixedly installed at the lower end of the lifting rod 78. The locking connector 79 is provided with a locking inclined surface 791 that facilitates rotation and engagement with the lifting platform 5. A lifting platform 5 is positioned below the floating platform 1, with a water collector 6 fixedly mounted at its lower end. The water collected by the collector 6 is injected into the monitoring instrument 4 via a pump pipe for analysis. To enable multi-depth monitoring of shallow water, multiple lock slots 51 that mate with the locking connector 79 are fixedly mounted at the upper end of the lifting platform 5. The bottom of each lock slot 51 has a lock groove 52 for the locking connector 79 to rotate and engage. A spring groove 56 is also provided at the bottom of the lock groove 52, with a compression spring 58 fixedly connected inside. A compression plate 57 is connected to the upper end of the compression spring 58 and slidably connected within the lock groove 52. Through the elastic action of the compression spring 58, the locking connector 79 can be pressed tightly into the lock groove 52, ensuring a stable connection. Drainage holes 55 are provided on the side walls of both the lock groove 52 and the connecting seat 54 to facilitate the drainage of accumulated water. When the lifting platform 5 needs to be connected to the shallow lifting drive 7, the lifting rod 78 moves downward under the drive of the lifting gear 74, and the locking connector 79 is inserted downward into the locking head slot 51. Subsequently, the locking mechanism 9 is activated. The locking mechanism 9 includes multiple sets of rotating sleeves 95, which are rotatably mounted on the lower outer periphery of the support sleeve column 2 that extends into the mounting groove. A limit block 97 is provided on the inner side of the rotating sleeve 95, the lifting rod 78 is slidably connected in the rotating sleeve 95, and the lifting rod 78 is provided with a limit groove 782 along the axial side wall that slides with the limit block 97. The locking mechanism 9 also includes a locking motor 91 fixedly mounted on the top of the floating platform 1, and a locking gear 92 is fixedly mounted on its output shaft. An external gear disk 93 that meshes with the locking gear 92 is rotatably mounted on the outer periphery of the gear disk bushing 94 fixedly mounted in the mounting groove. A connecting gear disk 96 that meshes with the external gear disk 93 is fixedly provided on the outer periphery of the multiple sets of rotating sleeves 95. When the locking motor 91 starts, it synchronously drives multiple sets of rotating sleeves 95 through the locking gear 92, external gear disc 93, and connecting gear disc 96. The rotating sleeves 95 rotate, causing the lifting rod 78 to rotate via the limiting block 97 on their inner side. This causes the locking connector 79 to rotate and disengage from the lock head slot 51, thus achieving a fixed connection between the shallow lifting drive 7 and the lifting platform 5 through the locking connector 79. At this time, the lifting platform 5 can move up and down within a preset shallow water depth range under the drive of the shallow lifting drive 7, collecting water samples at different depths. This method of synchronously driving multiple sets of lifting rods through gears and gear discs significantly improves the convenience and synchronization of operation compared to traditional manual or independently driven locking methods. After shallow water monitoring is completed, if monitoring of deeper water is required, the shallow lifting drive 7 needs to be separated from the lifting platform 5, and the deep lifting drive 8 needs to be activated. First, the locking mechanism 9 is restarted, rotating the rotating sleeve 95. The limiting block 97 on the inner side of the rotating sleeve 95 drives the lifting rod 78 to rotate, so that the locking joint 79 rotates to be aligned with the lock slot 51. Then, the lifting rod 78 moves upward under the drive of the lifting gear 74, realizing the separation between the locking joint 79 and the lifting platform 5. At this time, the mounting groove and connecting boss 102 at the lower end of the floating platform 1, and the connecting seat 54 at the center of the upper end of the lifting platform 5, after the lifting platform 5 retracts, position the lifting platform 5 through the cooperation of the connecting seat 54 and the connecting boss 102, preventing it from shaking during deep lifting. When motor 81 starts, cable shaft 82 rotates, raising and lowering cable 84, thereby driving lifting platform 5 to move up and down in deep water to collect samples at different depths. Through the coordinated operation of the shallow-level lifting drive 7 and the deep-level lifting drive 8, this device can flexibly perform precise depth adjustment and sampling in both shallow and deep water bodies. Compared with existing devices where the sensor monitoring components are directly fixed to the bottom of the floating board and the monitoring height cannot be adjusted, this device achieves a wide range and fine-grained adjustment of the water monitoring depth through two independent lifting drive systems. The shallow-level lifting drive 7 utilizes a rack and pinion structure to provide high-precision and rapid lifting in shallow waters; the deep-level lifting drive 8 utilizes a cable winding structure to lower the collector 6 into deeper waters, effectively solving the technical problem that existing devices cannot monitor and sample deep water bodies. Simultaneously, the introduction of the locking mechanism 9 automates and reliably connects and disconnects the shallow-level drive from the lifting platform 5, further improving the device's adaptability and operational efficiency. This layered and adjustable monitoring method allows users to comprehensively acquire water quality data at different depths of the lake, providing a more accurate and comprehensive basis for water environment management. The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water environment monitoring device with depth adjustment, characterized in that: include: A floating platform (1) is suspended on the water surface to be monitored, providing buoyancy support for water environment monitoring. A monitoring instrument (4) is fixedly installed on the upper end of the floating platform (1). The lifting platform (5) is located below the floating platform (1), and a collector (6) for collecting water is fixedly installed at its lower end. The collected water is injected into the monitoring instrument (4) through the pump pipe. Shallow lifting drive (7), which is set on the floating platform (1), is used to drive the lifting platform (5) to move up and down in the shallow water body and collect samples at different depths in the shallow water body. The deep-sea lifting drive (8) is set on the floating platform (1) and is used to drive the lifting platform (5) to move up and down in the deep water body to collect samples at different depths of the deep water body. The locking mechanism (9), which is set on the floating platform (1), is used to control the separation and locking of the shallow lifting drive (7) and the lifting platform (5).

2. The water environment monitoring device with depth adjustment according to claim 1, characterized in that: The upper end of the floating platform (1) is provided with multiple support columns (2). The inside of the support columns (2) is provided with through holes for installing shallow lifting drive (7). The top of the multiple sets of support columns (2) is fixedly provided with photovoltaic top plate (3). The lower end of the photovoltaic top plate (3) is provided with an inverter for converting solar energy into electrical energy to provide power supply for the monitoring instrument (4).

3. A water environment monitoring device with depth adjustment according to claim 2, characterized in that: The lower end of the floating platform (1) is provided with an installation groove, and a connecting boss (102) is fixedly provided at the center of the bottom of the installation groove. The upper center of the lifting platform (5) is provided with a connecting seat (54) that cooperates with the connecting boss (102). The lifting platform (5) is positioned after it is retracted by the cooperation between the connecting seat (54) and the connecting boss (102).

4. A water environment monitoring device with depth adjustment according to claim 3, characterized in that: The shallow lifting drive (7) includes: Two sets of drive plates (71) are fixedly installed on the upper end of the floating platform (1). Two sets of drive shafts (73) are rotatably installed between the two sets of drive plates (71). A motor (72) for driving the drive shafts (73) to rotate is fixedly installed on the drive plates (71). Two sets of lifting gears (74) are fixedly installed on the drive shafts (73). The lifting rod (78) is provided with multiple sets of through holes in the support sleeve (2). The outer periphery of the lifting rod (78) is provided with lifting gear teeth (781) that mesh with the lifting gear (74). The side wall of the support sleeve (2) is provided with sleeve groove (21) for the lifting gear (74) to pass through. The lower end of the lifting rod (78) is fixedly provided with a locking connector (79) that is engaged with the lifting platform (5). The locking connector (79) is provided with a locking inclined surface (791) that facilitates rotation and engagement with the lifting platform (5).

5. A water environment monitoring device with depth adjustment according to claim 4, characterized in that: Two sets of transmission shafts (75) are rotatably mounted in the middle of the drive plate (71). Transmission gears (76) and belt drives (77) are fixedly connected to both sets of transmission shafts (75). The two sets of transmission gears (76) are meshed and connected, and the two sets of belt drives (77) are respectively connected to the drive shafts (73) on the same side, so that a set of motors (72) can drive the two sets of drive shafts (73) to rotate synchronously in opposite directions.

6. A water environment monitoring device with depth adjustment according to claim 4, characterized in that: The deep lifting drive (8) includes two sets of cable shafts (82) rotatably installed between two sets of drive plates (71), and a motor (81) for driving the cable shafts (82) to rotate is fixedly installed on the drive plates (71). The two sets of cable shafts (82) are connected by a belt drive (83). A cable connecting seat (85) is fixedly provided in the middle of the cable shaft (82). Lifting cables (84) are fixedly connected to both ends of the cable connecting seat (85). The lifting cables (84) are tied to the cable shaft (82), and the end of the lifting cable (84) away from the cable connecting seat (85) passes through the floating platform (1) and is connected to the lifting platform (5). The floating platform (1) is provided with a cable through hole (101) for the lifting cable (84) to pass through, and the upper end of the lifting platform (5) is provided with a cable support plate (53) connected to the lifting cable (84).

7. A water environment monitoring device with depth adjustment according to claim 5, characterized in that: The upper end of the lifting platform (5) is fixedly provided with a plurality of lock head slots (51) that cooperate with the lock head connector (79). The bottom of the lock head slot (51) is provided with a lock head rotating groove (52) for the lock head connector (79) to rotate and engage. The side wall of the lock head rotating groove (52) and the side wall of the connecting seat (54) are both provided with drainage holes (55) for drainage.

8. A water environment monitoring device with depth adjustment according to claim 7, characterized in that: The bottom of the lock head rotating groove (52) is provided with a spring groove (56), and a compression spring (58) is fixedly connected in the spring groove (56). The upper end of the compression spring (58) is connected with a compression plate (57), and the compression plate (57) is slidably connected in the lock head rotating groove (52). The compression spring (58) presses the lock head (79) into the lock head rotating groove (52) through its elastic action.

9. A water environment monitoring device with depth adjustment according to claim 7, characterized in that: The locking mechanism (9) includes multiple sets of rotating sleeves (95). The rotating sleeves (95) are rotatably installed on the lower outer periphery of the support sleeve column (2) that extends into the mounting groove. The inner side of the rotating sleeve (95) is provided with a limit block (97). The lifting rod (78) is slidably connected in the rotating sleeve (95), and the lifting rod (78) is provided with a limit groove (782) that slides with the limit block (97) along the axial side wall. When it is necessary to separate the lock connector (79) from the lock head slot (52), rotate the rotating sleeve (95) and drive the lifting rod (78) to rotate through the limiting block (97) on the inner side of the rotating sleeve (95), so that the lock connector (79) rotates to be aligned with the lock head slot (51), and the lifting rod (78) moves upward under the drive of the lifting gear (74), thereby realizing the separation between the lock connector (79) and the lifting platform (5); When it is necessary to fix the connection between the lifting rod (78) and the lifting platform (5), the lifting rod (78) first moves downward under the drive of the lifting gear (74), and the locking connector (79) is inserted downward into the lock slot (51). Then, the rotating sleeve (95) is rotated and the lifting rod (78) is driven to rotate through the limiting block (97) on the inner side of the rotating sleeve (95), so that the locking connector (79) rotates and is offset from the lock slot (51). The fixed connection between the shallow lifting drive (7) and the lifting platform (5) is achieved through the locking connector (79).

10. A water environment monitoring device with depth adjustment according to claim 9, characterized in that: The locking mechanism (9) further includes a locking motor (91) fixedly installed on the top of the floating platform (1) and a gear bushing (94) fixedly installed in the mounting groove. A locking gear (92) is fixedly installed on the output shaft of the locking motor (91). An external gear (93) that meshes with the locking gear (92) is rotatably installed on the outer periphery of the gear bushing (94). A connecting gear (96) that meshes with the external gear (93) is fixedly installed on the outer periphery of multiple sets of rotating sleeves (95). The synchronous drive of the rotation of multiple sets of lifting rods (78) is realized through a locking motor (91).

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