A hydrological linkage type electronic fence warning device for monitoring a tidal flat of a hydropower station

Abstract

The present application relates to the technical field of water conservancy safety protection equipment, and particularly relates to a hydrological linkage type electronic fence warning device for monitoring of a water and electricity station beach, which comprises a stand column, the stand column is fixed at the edge of the beach, a machine box is installed at the top of the stand column, L-shaped movable grooves are symmetrically formed at the two corners above the machine box, linkage telescopic fences are symmetrically and rotatably connected in the machine box, and a driving mechanism for driving the linkage telescopic fences to rotate is arranged in the machine box, and the linkage telescopic fences are driven by the driving mechanism within the range of the groove opening of the L-shaped movable groove. The linkage telescopic fences are driven by the worm and worm gear, are converted between vertical contraction and horizontal expansion along the L-shaped movable groove, and are matched with the self-weight folding of the stop lever, so that the mechanical linkage adjustment of the fence area with the water level change is realized without manual intervention; the axial movement structure formed by the square shaft and the straight groove realizes pure mechanical self-locking in the vertical state.

Description

Technical Field

[0001] This invention relates to the field of safety protection equipment for water conservancy projects, specifically to a hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations. Background Technology

[0002] Downstream of hydropower stations, river channels and reservoir drawdown zones, including tidal flats, are directly affected by water conservancy operations such as flood discharge and water storage, resulting in real-time dynamic changes in water levels. The submerged and exposed areas of the tidal flats change synchronously with the rise and fall of water levels. In such scenarios, how to implement safety management for pedestrians entering the tidal flats has long been a technical challenge in the field of water conservancy safety protection. Currently, the safety warning devices used in hydropower station tidal flat areas are mostly fixed warning signs or fixed electronic fences. These devices have significant problems in practical application: Once installed, the location and warning range of fixed warning devices cannot be adjusted. When the hydropower station opens the gate to release water and the water level rises, the warning facilities originally set on the edge of the mudflat are easily submerged by the water. Their warning signs are submerged below the water surface and completely lose their visual warning function for pedestrians. Moreover, the long-term submersion of the warning facilities underwater will also affect their lifespan. When the gate is closed and the water level drops, the visible area of ​​the mudflat expands accordingly. However, the height of the original warning barriers remains at the initial position when it was installed and cannot be extended to adapt to the dangerous area with the water level change, forming a large area of ​​blind spot for supervision. Pedestrians can easily wander into the dangerous area from the area without warning barriers.

[0003] In summary, in response to the safety warning requirements under the dynamic hydrological changes of hydropower station tidal flats, there is an urgent need for a warning device that can adapt to changes in the form of the enclosure based on water level fluctuations and does not require frequent manual intervention, in order to solve the aforementioned technical problems of existing fixed and mobile warning devices. Summary of the Invention

[0004] To address the aforementioned shortcomings and problems of dynamic water level changes in hydropower station tidal flats, the inability of fixed warning boundaries to adaptively adjust, ineffectiveness during flooding, and the expansion of the warning area during receding water, creating blind spots; and the lag and laboriousness of manual adjustments, this invention provides a hydrologically linked electronic fence warning device for monitoring tidal flats in hydropower stations. This device utilizes a worm gear-driven, L-shaped movable groove for vertical contraction and horizontal expansion of the linked telescopic fence, which, combined with the weight of the barrier, achieves mechanical linkage adjustment of the fenced area according to water level changes without manual intervention. An axial movement structure composed of a square shaft and a straight groove enables purely mechanical self-locking in the vertical state. Furthermore, the device integrates a float-driven multi-stage telescopic rod with a contact sensor into a single water level sensing barrier, avoiding the vulnerability of independent underwater probes.

[0005] The solution adopted by this invention to solve its technical problem is: a hydrological linkage electronic fence warning device for monitoring tidal flats in hydropower stations, including a column, the column being fixed to the edge of the tidal flat, a housing being installed on the top of the column, and L-shaped movable slots being symmetrically opened at the two corners above the housing, with a linkage telescopic fence symmetrically rotatably connected inside the housing, and a drive mechanism for driving the linkage telescopic fence to rotate being provided inside the housing, the linkage telescopic fence being driven by the drive mechanism within the slot opening range of the L-shaped movable slot, when rotating to a vertical state, the linkage telescopic fence retracts and locks, and when rotating to a horizontal state, the linkage telescopic fence unfolds to enclose the tidal flat area; The telescopic fence includes a main arm seat that is rotatably mounted in a housing via a pin. The main arm seat extends out of an L-shaped movable slot and a main stop arm is fixedly welded to its outer end. The main stop arm is made of U-shaped channel steel, and multiple stop bars are hinged along the length of the main stop arm. When the main stop arm is in a vertically retracted state, the stop bars retract into the main stop arm. When the main stop arm is in a horizontally extended state, the stop bars rotate under their own weight to be perpendicular to the main stop arm, thereby unfolding the telescopic fence.

[0006] Furthermore, the drive mechanism includes a drive motor, a worm gear, two worm wheels symmetrically arranged with respect to the worm gear, and a rotating shaft. The motor is installed inside the housing, the worm gear is fixedly mounted on the output end of the drive motor, the rotating shaft is rotatably mounted inside the housing via a bearing seat, the worm wheels are fixedly mounted on the rotating shaft, and both worm wheels mesh with the worm gear. The rear end of the rotating shaft is limited and mounted on the main boom seat. The drive motor drives the worm gear to rotate, the worm gear drives the two worm wheels to rotate in opposite directions, and at the same time drives the main boom to rotate and extend or retract via the rotating shaft.

[0007] Furthermore, the rear end of the rotating shaft is a square shaft, and a straight groove two is longitudinally opened on the side of the main arm seat facing the worm gear. The rear end of the square shaft is movably fitted in the straight groove two, and the front end of the rotating shaft is rotatably fitted in the bearing seat. The bearing seat is a square shaft seat, and a straight groove one is longitudinally opened on the front side of the housing. The square shaft seat is movably fitted in the straight groove one. When the drive mechanism drives the linkage telescopic fence to retract to the vertical state, the drive mechanism continues to operate. The main arm seat is limited and blocked by the slot opening of the L-shaped movable groove. At this time, the worm continues to rotate, which will drive the worm gear to make a slight axial movement, causing the square shaft section at the rear end of the rotating shaft to move upward in the straight groove two, misaligning with the axis of the hinge pin of the main arm seat. The main arm cannot rotate, realizing the locking of the linkage telescopic fence in the folded state.

[0008] Furthermore, the stop lever hinged inside the main stop arm is a multi-stage telescopic rod. The top end of the multi-stage telescopic rod is hinged inside the main stop arm, and a contact sensor is installed at the top of the inner cavity of the top end of the rod. The contact sensor is electrically connected to the drive mechanism, and a float is connected to the tail end of the multi-stage telescopic rod via a connecting rope.

[0009] Furthermore, an electromagnet ring is embedded in the bottom of the top section of the multi-stage telescopic rod, and an iron plate that magnetically engages with the electromagnet ring is fixedly connected to the bottom of the tail section of the multi-stage telescopic rod.

[0010] Furthermore, each of the multi-stage telescopic rods has a retaining rope connected to its bottom, and the retaining rope connects to adjacent multi-stage telescopic rods.

[0011] Furthermore, crossbars are symmetrically welded onto the column along its length.

[0012] Furthermore, an audible and visual alarm is installed on the front of the chassis, and a solar power supply component is installed on the back of the chassis.

[0013] The beneficial effects of this invention are: This invention utilizes two sets of interconnected telescopic fences, synchronously driven by a drive mechanism, to constrain the fence's movement trajectory within L-shaped slots at the corners of the housing. This allows the fence to switch between a vertically retracted state and a horizontally extended state under the drive mechanism. When the fence rotates to the horizontally extended state, multiple levers hinged within the main arm automatically extend to a position perpendicular to the main arm under their own weight, forming a planar enclosure. When the fence rotates to the vertically retracted state, the levers retract into the U-shaped slots of the main arm under their own weight, achieving retraction. This invention achieves the switching between the extended and retracted states of the fence simply by controlling the rotation direction of the drive mechanism, resulting in a compact structure and a simple and reliable state transition logic.

[0014] The drive mechanism of this invention employs a transmission method where a worm gear meshes with two symmetrically arranged worm wheels. A single drive motor can synchronously drive the two telescopic fences on both sides to rotate in opposite directions, achieving simultaneous deployment or retraction of the fences. Furthermore, this transmission method has a self-locking characteristic; when the worm gear does not rotate actively, the worm wheels cannot be driven in the reverse direction, effectively preventing accidental rotation of the fences due to external wind or other interference during deployment or retraction. This improves the device's ability to maintain its posture in windy outdoor environments. The locking method requires no additional independent locking components; locking and unlocking are achieved solely through the interplay of the structure itself. The structure has high integration and locking rigidity, resulting in higher reliability in high-humidity and corrosion-prone outdoor environments.

[0015] This invention designs the barrier as a multi-stage telescopic rod, with a contact sensor installed at the top of the inner cavity of the rod's uppermost section. A float is connected to the tail end of the rod via a connecting rope, enabling the barrier device to directly sense water level changes. When the water level rises to a preset height, the buoyancy of the float causes the tail end of the rod to retract upwards and touch the contact sensor. The sensor then generates a trigger signal, which is transmitted to the controller of the drive mechanism, automatically executing the corresponding barrier state switching action. This design integrates the water level sensing component inside the barrier's barrier structure, eliminating the need for separate electronic sensing probes that are constantly submerged in water and deployed outside the posts or housing. The sensing end adapts to the position of the barrier, avoiding the problems of independent probes being easily buried by silt or damaged by floating debris. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the electronic fence warning device of the present invention; Figure 2 This is a schematic diagram of the extended state of the telescopic fence of the present invention; Figure 3 This is a schematic diagram of the retracted state of the telescopic fence of the present invention; Figure 4 This is a front view schematic diagram of the drive mechanism and the linkage telescopic fence of the present invention; Figure 5 This is an exploded view of the drive mechanism and the linked telescopic fence of the present invention; Figure 6 This is a schematic diagram of the unlocked structure of the telescopic fence in the retracted state according to the present invention; Figure 7 This is a schematic diagram of the locking structure of the telescopic fence in its retracted state according to the present invention; Figure 8 This is a schematic diagram of the linkage telescopic fence structure of the present invention; Figure 9 This is a schematic diagram of the multi-stage telescopic rod structure of the present invention.

[0017] In the diagram: 1. Column; 2. Chassis; 3. L-shaped movable groove; 4. Straight groove one; 5. Drive motor; 6. Worm gear; 7. Worm wheel; 8. Rotating shaft; 9. Square shaft seat; 10. Main boom seat; 11. Straight groove two; 12. Main stop arm; 13. Multi-stage telescopic rod; 14. Float; 15. Iron sheet; 16. Contact sensor; 17. Crossbar; 18. Guard rope; 19. Audible and visual alarm; 20. Solar power supply component. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Please see Figure 1-9This invention provides a technical solution for a hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations: Example

[0020] In the downstream river channels and reservoir drawdown zones of hydropower stations, water levels exhibit dynamic and non-constant changes due to water conservancy scheduling. When the gates are opened for flood discharge, the rapid rise in water level can submerge existing fixed warning facilities, rendering them ineffective. Furthermore, these facilities, being submerged, are subject to corrosion due to prolonged water flow, affecting their lifespan. When the gates are closed for impoundment, the receding water level exposes large areas of mudflats, and the fixed warning boundaries cannot be adjusted accordingly, creating blind spots that can easily lure people into these areas, posing serious safety hazards. In addition, existing mobile warning devices often rely on complex electronic control systems and sensor networks. In the high-humidity, unreliable mudflat environments with limited mains power, their system reliability, ease of maintenance, and all-weather operation capabilities face significant challenges. Therefore, this invention aims to provide a mechanically linked warning device with high structural reliability, adaptability to dynamic water level changes, and multiple physical deterrent capabilities in emergency situations. Example

[0021] This embodiment combines Figures 1 to 7 The basic structure and working principle of the present invention will be explained.

[0022] This invention provides a hydrologically linked electronic fence warning device for monitoring tidal flats in hydropower stations, such as... Figure 2 and Figure 3 As shown, the installation includes a column 1 as the main body, which is fixedly installed at a predetermined position on the edge of the mudflat. The warning devices are arranged to completely surround the edge of the mudflat, and adjacent warning devices can be used in conjunction with barriers. A housing 2 is installed on the top of the column 1. The upper two corners of the housing 2 have symmetrically opened inverted L-shaped movable slots 3. Two sets of linked telescopic barriers are symmetrically rotatably connected inside the housing 2. A drive mechanism is set inside the housing to drive the two sets of linked telescopic barriers to rotate synchronously, and the movement trajectory of the linked telescopic barriers is restricted within the opening range of the L-shaped movable slots 3. Driven by the drive mechanism, when the linked telescopic barriers rotate to the vertical position, they retract and complete the structural locking; when the linked telescopic barriers rotate to the horizontal position, they automatically extend outward, and adjacent barriers cooperate to form a physical barrier around the mudflat area, such as... Figure 1 As shown.

[0023] A set of telescopic fences includes a main arm base 10, which is rotatably mounted inside the housing 2 via a pin. The outer end of the main arm base 10 extends through an L-shaped movable groove 3 and is connected to a main stop arm 12 by welding or other fixing methods. The main stop arm 12 adopts a U-shaped channel steel structure to serve as a base for accommodating and supporting other components. Multiple stop bars are hinged along the length of the U-shaped groove of the main stop arm 12 via hinges or pins, and these stop bars are gravity-driven components: when the main stop arm 12 is in a vertically retracted state, the stop bars naturally droop under their own weight, retracting and being accommodated inside the U-shaped groove of the main stop arm 12, minimizing space occupation; when the drive mechanism drives the main arm base 10 and the main stop arm 12 to rotate from a vertical state to a horizontal state, the stop bars swing outward around the hinge point under the action of gravity until they rotate to a posture perpendicular to the length direction of the main stop arm 12, thus transforming the entire telescopic fence from a linear retracted state to a planar enclosure state. This process eliminates the need for an additional motor to drive the lever, simplifying the structure and reducing energy consumption.

[0024] To achieve the symmetrical and opposite movements of the two sets of linked telescopic fences, the drive mechanism employs a worm gear transmission. Specifically, as follows... Figure 4 and Figure 5 As shown, the drive mechanism includes a drive motor 5, a worm gear 6, two worm wheels 7, and two rotating shafts 8. The drive motor 5 is fixed inside the housing 2. The worm gear 6 is fixedly mounted on the output shaft of the drive motor 5. The two rotating shafts 8 are rotatably supported inside the housing 2 by bearing seats. The two worm wheels 7 are fixedly mounted on their respective rotating shafts 8 and are engaged with the middle worm gear 6. The rear end of the rotating shaft 8 is limitedly connected to the corresponding side main arm seat 10. When the drive motor 5 rotates, the power is transmitted through the worm gear 6 to the worm wheels 7 on both sides, causing the two worm wheels 7 to rotate in opposite directions. This, in turn, drives the main arms 12 on both sides to rotate synchronously in opposite directions through the rotating shafts 8, completing the simultaneous opening or retraction of the two fence panels.

[0025] Furthermore, to ensure reliable locking of the fence in its vertically retracted state and prevent accidental swaying due to wind or vibration, this device also incorporates an axial movement locking structure. Specifically, as follows... Figure 6 and Figure 7As shown, the rear end of the rotating shaft 8 is machined into a square shaft. On the end face of the main boom seat 10 facing the worm gear 7, a straight groove 21 is longitudinally formed. The square shaft section of the rotating shaft 8 is movably fitted in the straight groove 211, allowing the rotating shaft 8 to both drive the main boom seat 10 to rotate and allow relative displacement between the two in the axial direction. Correspondingly, the front end of the rotating shaft 8 is rotatably fitted in a bearing seat, which is a square shaft seat 9. On the front side wall of the housing 2, a straight groove 14 corresponding to the position of the bearing seat is longitudinally formed. The square shaft seat 9 is movably fitted in the straight groove 14. The entire rotating shaft 8, together with the square shaft seats 9 and the worm gear 7 at both ends, constitutes a component that can float slightly along its own axis. Its locking principle is: when the drive mechanism drives the linkage telescopic fence to rotate to... Figure 6 In the vertical position shown, the side wall of the main boom seat 10 is physically blocked by the upper edge of the L-shaped movable groove 3, preventing it from rotating further. At this time, if the drive motor 5 continues to output a small amount of torque in the retracting direction, the rotation of the worm 6 will force the meshing worm wheel 7 to generate an axial thrust, pushing the worm wheel 7, rotating shaft 8, and square shaft seat 9 to move slightly upward along the straight groove 4. This causes the square shaft section at the rear end of the rotating shaft 8 to move upward within the straight groove 11, resulting in a misalignment between the rotation center of the rotating shaft 8 and the hinge pin axis of the main boom seat 10. Due to the change in the torque transmission axis, the drive mechanism can no longer apply effective rotational torque to the main boom seat 10, and the main boom 12 is rigidly locked in the vertical position, unable to fall freely even if the drive motor is de-energized. Only when the drive motor 5 rotates in the opposite direction, driving the worm wheel 7 to axially reset through the worm 6, and the axis of the square shaft section realigns with the pin axis, can the main boom 12 be driven to unfold outward again. To enhance the structural strength of the column 1 and facilitate climbing by maintenance personnel, multiple horizontal bars 17 are symmetrically welded to the column 1 along its length. These horizontal bars 17 not only function as ladders but also form a barrier between the column and the innermost guardrail, further enhancing the effective enclosure area of ​​the fence.

[0026] The device described in this embodiment can complete the symmetrical expansion and retraction of the fences on both sides with a single drive motor 5. The transmission chain is short and the synchronization is good. The automatic rotation and axial movement locking of the purely mechanical lever eliminates the need for a large number of sensors and auxiliary motors, making the device highly reliable in the high humidity and large temperature difference environment of the tidal flat. The switching and locking of the fence state is completely guaranteed by the kinematic constraints of the mechanical structure itself. The control logic is extremely simple, requiring only the control of the forward and reverse rotation and power on / off of the motor. Example

[0027] Based on the technical solution described in Embodiment 1, this embodiment further optimizes the barrier structure and control method. This embodiment focuses on solving the problem of how to enable the barrier device itself to directly sense water level changes and automatically trigger warnings or change its form under specific hydrological conditions.

[0028] In this embodiment, the various baffles hinged within the main baffle arm 12 are multi-stage telescopic rods 13. The number of telescopic stages and the length of the telescopic rods can be reasonably designed according to the actual enclosure area of ​​the tidal flat and the height of the columns. For example Figure 8 and Figure 9 As shown, the multi-stage telescopic pole 13 is composed of multiple nested tubular poles. The upper end of the top pole is hinged to the U-shaped groove of the main stop arm 12, and a contact sensor 16 is fixedly installed inside the top cavity of the top pole. This contact sensor 16 is electrically connected to the controller of the drive motor 5 of the drive mechanism via a signal cable, and the signal it emits can directly intervene in the working state of the drive mechanism. At the tail end of the last pole of the multi-stage telescopic pole 13, a float 14 is connected by a flexible connecting rope. The float 14 is used to sense the water accumulation or rise in water level on the tidal flat.

[0029] When the mudflat is dry with no water accumulation or extremely low water level, the multi-stage telescopic pole 13 unfolds under the drive of the main boom 12 and hangs down with gravity. Each section of the pole is in a fully or partially stretched natural state, and the float 14 rests on the ground. Once the hydropower station starts to release floodwater or the water level rises and the water flows over the mudflat, the float 14 will float up due to the buoyancy of the water. The upward movement of the float 14 will pull the tail end of the multi-stage telescopic pole 13 section by section through the connecting rope. When the water level continues to rise to the preset maximum water level, the buoyancy of the float 14 overcomes the friction and gravity between the poles, and finally retracts the pole completely. When the upper end of the second section of the pole touches the contact sensor 16 in the inner cavity of the top pole, the contact sensor 16 is triggered and generates an electrical signal. This signal is sent to the controller of the drive mechanism, which can drive the linkage telescopic fence to retract and at the same time send a high water level warning to the control center.

[0030] To ensure that the multi-stage telescopic boom 13 remains retracted when the telescopic fence is in its retracted state, and to ensure that the multi-stage telescopic boom can smoothly retract into the main arm, this embodiment also includes a magnetic positioning structure. For example... Figure 8As shown, an electromagnet ring is embedded at the bottom of the top section of the multi-stage telescopic pole 13. Correspondingly, an iron plate 15 is fixedly connected to the bottom of the tail section of the multi-stage telescopic pole 13. When the telescopic fence needs to be deployed, the electromagnet ring is de-energized, and the multi-stage telescopic pole can automatically extend by its own weight to deploy the fence. When the fence needs to be closed and retracted, the electromagnet ring is energized to generate magnetic force, which firmly attracts the iron plate 15 on the tail section, locking all telescopic sections in the retracted position so that the multi-stage telescopic pole can be smoothly retracted into the main arm.

[0031] Furthermore, in order to increase the effective enclosure area of ​​the fence, flexible retaining ropes 18 are connected between the bottom of each section of the multi-stage telescopic pole 13. The length of the retaining ropes 18 is equal to or slightly greater than the maximum safe tensile length of the adjacent pole. When the pole is extended, the retaining ropes also unfold, thus achieving effective enclosure of the fence.

[0032] This embodiment introduces a combination of multi-stage telescopic rods, floats, contact sensors, and magnetic locking to convert the mechanical energy of the water level into a trigger signal. This invention does not require setting up independent electronic sensing points on the column that are submerged in water for a long time. Instead, the sensing components are integrated into the extension components of the fence itself. The sensing source automatically adjusts with the fence boundary position, solving the problem that fixed probes may be buried by silt or damaged by floating objects. Example

[0033] This embodiment mainly addresses the issue of long-term autonomous operation of the device in outdoor environments without mains power, and further enhances its warning effectiveness in actively driving away enemies.

[0034] An audible and visual alarm 19 is integrated and installed on the front of the chassis 2. The audible and visual alarm 19 includes a high-brightness LED strobe light and a high-power speaker. Its control circuit is linked with the controller of the contact sensor 16 described in Embodiment 2. When the water level triggers the contact sensor, the controller sends a command to the drive mechanism and simultaneously activates the audible and visual alarm 19 to generate strong visual and auditory warning signals to provide warnings to people around the mudflat area.

[0035] To solve the problem of power supply in the field, a solar power supply component 20 is installed on the back of the chassis 2. The solar power supply component 20 is installed at a high position, which is not easily submerged or impacted by rising river water. Its structure includes a photovoltaic panel, a charging controller and an energy storage battery pack. The photovoltaic panel converts solar energy into electrical energy during the day and stores it in the battery pack through the charging controller. The battery pack provides unified power supply for all electrical loads such as the drive motor 5, the audible and visual alarm 19 and the electromagnetic ring described in Embodiment 2.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydrological-linked electronic fence warning device for monitoring tidal flats at a hydropower station, comprising a column (1) fixed to the edge of the tidal flat, and a housing (2) installed on the top of the column (1), characterized in that, The upper two corners of the chassis (2) are symmetrically provided with L-shaped movable slots (3). A linkage telescopic fence is symmetrically rotatably connected inside the chassis (2). A drive mechanism for driving the linkage telescopic fence to rotate is provided inside the chassis (2). The linkage telescopic fence is driven by the drive mechanism within the slot opening of the L-shaped movable slot (3). When rotated to the vertical state, the linkage telescopic fence retracts and locks. When rotated to the horizontal state, the linkage telescopic fence unfolds to enclose the tidal flat area. The telescopic fence includes a main arm seat (10) that is rotatably mounted in a housing (2) via a pin. The main arm seat (10) extends out of an L-shaped movable groove (3) and a main stop arm (12) is fixedly welded to its outer end. The main stop arm (12) is made of U-shaped channel steel. Multiple stop bars are hinged along the length direction inside the main stop arm (12). When the main stop arm (12) is in a vertically retracted state, the stop bars retract into the main stop arm (12). When the main stop arm (12) is in a horizontally extended state, the stop bars rotate by their own weight to be perpendicular to the main stop arm (12), thereby causing the telescopic fence to unfold.

2. The hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations according to claim 1, characterized in that, The drive mechanism includes a drive motor (5), a worm (6), two worm wheels (7) symmetrically arranged with respect to the worm (6), and a rotating shaft (8). The motor is installed inside the housing (2). The worm (6) is fixedly mounted on the output end of the drive motor (5). The rotating shaft (8) is rotatably mounted inside the housing (2) through a bearing seat. The worm wheels (7) are fixedly mounted on the rotating shaft (8), and both worm wheels (7) mesh with the worm (6). The rear end of the rotating shaft (8) is limited and mounted on the main arm seat (10). The drive motor (5) drives the worm (6) to rotate, and the worm (6) drives the two worm wheels (7) to rotate in opposite directions. At the same time, the rotating shaft (8) drives the main arm (12) to rotate, unfold, or retract.

3. The hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations according to claim 2, characterized in that, The rear end of the rotating shaft (8) is a square shaft. A straight groove two (11) is longitudinally opened on the side of the main arm seat (10) facing the worm gear (7). The rear end of the square shaft is movably fitted in the straight groove two (11). The front end of the rotating shaft (8) is rotatably fitted in the bearing seat. The bearing seat is a square shaft seat (9). A straight groove one (4) is longitudinally opened on the front side of the machine box (2). The square shaft seat (9) is movably fitted in the straight groove one (4). When the drive mechanism drives the linkage telescopic fence to retract to the vertical state, the drive mechanism continues to operate. The main arm seat (10) is limited and blocked by the slot opening of the L-shaped movable groove (3). At this time, the worm (6) continues to rotate and will drive the worm gear (7) to make a slight axial movement, causing the square shaft section at the rear end of the rotating shaft (8) to move upward in the straight groove two (11) and misalign with the axis of the hinge pin of the main arm seat (10). The main arm (12) cannot rotate, thus realizing the locking of the linkage telescopic fence in the folded state.

4. The hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations according to claim 1, characterized in that, The stop lever hinged inside the main stop arm (12) is a multi-stage telescopic rod (13). The top end of the multi-stage telescopic rod (13) is hinged inside the main stop arm (12), and a contact sensor (16) is installed on the top of the inner cavity of the top end of the rod. The contact sensor is electrically connected to the drive mechanism. The tail end of the multi-stage telescopic rod (13) is connected to a float (14) by a connecting rope.

5. The hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations according to claim 4, characterized in that, An electromagnet ring is embedded in the bottom of the top rod of the multi-stage telescopic rod (13), and an iron plate (15) that magnetically engages with the electromagnet ring is fixedly connected to the bottom of the tail rod of the multi-stage telescopic rod (13).

6. The hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations according to claim 4, characterized in that, Each of the multi-stage telescopic poles (13) has a retaining rope (18) connected to its bottom, and the retaining rope (18) is connected to the adjacent multi-stage telescopic poles (13).

7. The hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations according to claim 1, characterized in that, A crossbar (17) is symmetrically welded to the column (1) along its length.

8. The hydrological-linked electronic fence warning device for monitoring tidal flats in hydropower stations according to claim 1, characterized in that, The front of the chassis (2) is equipped with an audible and visual alarm (19), and the back of the chassis (2) is also equipped with a solar power supply component (20).

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