Inverted cylinder gate water filling device

Abstract

The utility model relates to a water filling device of inverted oil cylinder gate, including water filling mechanism, water filling mechanism includes main pipeline and the two branch pipeline of connecting in the main pipeline end, wherein the water valve is established to main pipeline, the water filling valve is established to first branch pipeline, and the sand flushing valve is established to second branch pipeline, the water outlet is equipped with in the end of first branch pipeline and goes out along the horizontal or the direction of the oblique downward direction, the nozzle is equipped with in the end of second branch pipeline and goes out along the vertical downward direction, and the water outlet of first branch pipeline is distributed in the middle part of inverted oil cylinder gate, and the nozzle of second branch pipeline end is close to the lower end of inverted oil cylinder gate arrangement, the water valve, the water filling valve and the sand flushing valve are connected through the flexible axle and drive arrangement respectively, and drive arrangement is connected with control mechanism, the utility model is not limited by the oil cylinder structure, is not affected by silt, has flow passage water filling and gate bottom flushing and water filling speed adjustment function simultaneously, satisfies different use demand.

Description

Technical Field

[0001] This utility model relates to the technical field of gates in water conservancy projects such as reservoirs, sluices, and pumping stations, and specifically to a water filling device for an inverted hydraulic cylinder gate. Background Technology

[0002] The inverted hydraulic cylinder gate is a common gate opening and closing device, characterized by its inverted arrangement of the hydraulic cylinder. This device fixes the hydraulic cylinder piston rod to the upper frame via a support shaft, while a through hole is opened along the centerline of the hydraulic cylinder in the main gate beam, allowing the cylinder body to be directly embedded inside the gate leaf. This unique integrated design achieves a rigid connection between the hydraulic cylinder and the gate through flanges or support shafts, forming a compact power transmission system. This helps maintain the neatness and aesthetics of the dam surface. The gate's compact structure and tight integration of the hydraulic cylinder and gate leaf reduce external space occupation, making it particularly suitable for water conservancy projects with high aesthetic requirements. Common gate filling and pressure methods in domestic and international water conservancy projects include bypass valve filling, gate section filling, gate opening with a small gate filling, and gate with a filling valve.

[0003] The water filling system of the inverted hydraulic cylinder gate faces multiple technical challenges: First, its structural design limits the water filling method—the layout of the cylinder body embedded in the gate leaf makes it impossible to achieve inter-gate adjustment or implement composite opening control of the large gate within a small gate. Furthermore, the small opening of the gate is constrained by water head pressure, resulting in the industry only being able to use a single water filling scheme with a bypass pipe, and lacking a backup mechanism for failures. Second, current technology cannot meet the precise water filling control requirements of the NB / T10072 pumped storage power station design specification and the DL / T1770 pumped storage power station water conveyance system filling and drainage technical specifications. These two standards clearly require that the initial water filling must be monitored with staged pressure stabilization (e.g., water level rise ≤1m / h per stage, pressure stabilization ≥2 hours), while existing systems generally lack dynamic flow regulation capabilities. More seriously, under conditions of high sediment content, the water filling valve is prone to failure due to blockage by dirt. Related cases show that such failures can lead to gate leakage or even power plant flooding. In addition, the cleaning of silt at the bottom of the gate after it blocks water has problems such as low efficiency and high cost, which further highlights the shortcomings of traditional water filling methods in complex hydrological environments. Summary of the Invention

[0004] To address the aforementioned problems, this utility model provides a novel inverted hydraulic cylinder gate water filling device, which is not limited by the hydraulic cylinder structure or affected by mud and sand. It also features water filling of the flow channel, sludge flushing at the bottom of the gate, and water filling speed adjustment functions to meet different usage requirements.

[0005] The purpose of this utility model and the technical problem it solves are achieved by the following technical solution. According to this utility model, an inverted hydraulic cylinder gate water filling device includes a water filling mechanism fixed to the inverted hydraulic cylinder gate. The water filling mechanism includes a main pipe passing through the inverted hydraulic cylinder gate and two branch pipes connected to the end of the main pipe. The main pipe is equipped with a water intake valve, the first branch pipe is equipped with a water filling valve, and the second branch pipe is equipped with a sand flushing valve. The end of the first branch pipe is equipped with a water outlet that discharges water horizontally or downwards. The end of the second branch pipe is equipped with a nozzle that discharges water vertically downwards. The water outlet of the first branch pipe is located in the middle of the inverted hydraulic cylinder gate to achieve the purpose of water filling, and the nozzle at the end of the second branch pipe is arranged near the lower end of the inverted hydraulic cylinder gate to achieve the purpose of sand flushing. The water intake valve, water filling valve, and sand flushing valve are each connected to a corresponding drive device via a flexible shaft. The drive device is fixed on a maintenance platform, and the maintenance platform is also equipped with a control mechanism for controlling the operation of the drive device.

[0006] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0007] In the aforementioned inverted hydraulic cylinder gate water filling device, the distance between the nozzle at the outlet of the second branch pipe and the bottom of the inverted hydraulic cylinder gate is located at the optimal target distance L calculated based on the water level difference range before and after the inverted hydraulic cylinder gate. opt Within the range, ,in The jet pressure is equal to the water level difference before and after the inverted hydraulic cylinder gate, and d is the nozzle diameter.

[0008] The aforementioned inverted hydraulic cylinder gate water filling device includes a main pipeline comprising a horizontal inlet pipe passing through the inverted hydraulic cylinder gate and a vertical pipe extending along the height direction of the inverted hydraulic cylinder gate, with the water intake valve located on the vertical pipe; the end of the vertical pipe is connected to the first branch pipe and the second branch pipe via a tee.

[0009] The aforementioned inverted hydraulic cylinder gate water filling device includes a first branch pipe comprising a horizontal connecting pipe connected to the main pipe, a filling valve located on the horizontal connecting pipe, the horizontal connecting pipe extending vertically to the inverted hydraulic cylinder gate and having a vertical distribution pipe connected to its end, the vertical distribution pipe being connected to at least two horizontal distribution pipes extending parallel to the inverted hydraulic cylinder gate, each horizontal distribution pipe forming multiple water outlets in its extension direction.

[0010] The aforementioned inverted hydraulic cylinder gate water filling device includes a second branch pipe comprising a vertical connecting pipe, on which a sand flushing valve is installed. The lower end of the vertical connecting pipe is connected to a vertical distribution pipe and a horizontal distribution pipe respectively via a tee. The end of the vertical distribution pipe is provided with a nozzle, and the horizontal distribution pipe has at least one vertically downward nozzle distributed in both the direction parallel to and perpendicular to the inverted hydraulic cylinder gate.

[0011] The aforementioned inverted hydraulic cylinder gate water filling device further includes a bracket for fixing each pipeline within the inverted hydraulic cylinder gate beam grid.

[0012] The aforementioned inverted hydraulic cylinder gate water filling device, the control mechanism can control the water filling time and water flow rate, thereby realizing the control of the water level in the flow channel.

[0013] The aforementioned inverted hydraulic cylinder gate water filling device opens the water intake valve and the water filling valve when the flow channel needs to be filled with water, and closes the sand flushing valve; when the flow channel needs to be flushed with sand, the water intake valve and the sand flushing valve are fully opened, and the water filling valve is closed.

[0014] In the aforementioned inverted hydraulic cylinder gate water filling device, during the water filling process, the control mechanism can control the drive device to adjust the valve opening through the flexible shaft.

[0015] In the aforementioned inverted hydraulic cylinder gate water filling device, when the gate rises to the fully open position, the connection between the flexible shaft and the water filling mechanism valve is disengaged, the flexible shaft is retracted to the maintenance platform, and the connection between the flexible shaft and the drive device is also disengaged; when the gate needs to be lowered to block water again, the flexible shaft is connected to the water filling mechanism valve before the gate is lowered, and the flexible shaft is connected to the drive device when the gate is lowered to the fully closed position.

[0016] Compared with the prior art, this utility model has significant advantages and beneficial effects. Through the above technical solution, this utility model achieves considerable technological advancement and practicality, and has broad industrial application value. It possesses at least the following advantages:

[0017] This utility model of an inverted hydraulic cylinder gate water filling device adopts flexible and rigid transmission technology, and realizes power transmission of non-collinear transmission mechanism through a high-torque flexible shaft. This utility model breaks through the space limitation of traditional water filling valve design, and can efficiently complete long-distance torque transmission (transmission distance can reach more than 50m) in complex environments of hydraulic structures (such as in the presence of relative motion or confined space conditions).

[0018] This utility model relates to an inverted hydraulic cylinder gate water filling device. It uses a purely mechanical method, transmitting torque generated by a drive device via a mechanical shaft to open, close, and adjust the water filling volume. This solves the problem of not being able to install a water filling valve structure within the gate body of an inverted hydraulic cylinder gate, completely eliminating the regulatory limitations of linked opening and closing of the water filling valve. It achieves continuous regulation of water sources before and after the gate, simplifying the gate leaf structure design and the operating conditions of the hoist. It features dynamic flow regulation, allowing for adjustment of the water filling speed and precisely matching the staged pressure-stabilized water filling requirements specified in regulations. It combines water filling with channel flushing, effectively removing silt from the bottom of the gate through controllable vertical water flow; and reduces the maintenance and repair workload of traditional inverted hydraulic cylinder gate water filling valves. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the inverted hydraulic cylinder gate water filling device of this utility model;

[0020] Figure 2 This is a layout diagram of the inverted hydraulic cylinder gate water filling device of this utility model;

[0021] Figure 3 Layout diagram of the water filling mechanism for the inverted hydraulic cylinder;

[0022] Figure 4 This is a schematic diagram of the inverted hydraulic cylinder gate water filling device of this utility model when the transmission mechanism is not connected;

[0023] Figure 5 This is a schematic diagram of the upper connection of the transmission mechanism of the inverted hydraulic cylinder gate water filling device of this utility model;

[0024] Figure 6 This is a schematic diagram of the horizontal water filling operation of the inverted hydraulic cylinder gate water filling device of this utility model;

[0025] Figure 7 This is a schematic diagram of the sand flushing operation of the inverted hydraulic cylinder gate water filling device of this utility model.

[0026] [Explanation of Key Component Symbols]

[0027] 1-Control mechanism, 2-Transmission mechanism, 3-Water filling mechanism, 4-Hinge, 5-Inverted hydraulic cylinder gate, 6-Hydraulic structure, A-Water intake valve, B-Water filling valve, 8-Drive mechanism. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model to achieve the intended invention purpose, the following detailed description of the specific implementation method, structure, features and effects of the inverted hydraulic cylinder gate water filling device proposed according to this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] Please see Figure 1-7This is a schematic diagram of the structure of each part of the inverted hydraulic cylinder gate water filling device of this utility model. The device includes a control mechanism 1, a drive mechanism 8, a transmission mechanism 2 and a water filling mechanism 3. The control mechanism 1 is located on the maintenance platform of the hydraulic structure and is used to control the operation of the drive mechanism 8. The drive mechanism 8 is used to drive the transmission mechanism 2 to transmit torque to the water filling mechanism 3, so as to control the valve operation of the water filling mechanism 3 and achieve the purpose of controlling the operation of the water filling mechanism 3.

[0030] The water filling mechanism 3 includes a main pipe 31 with a water intake valve A. The main pipe 31 includes a horizontal inlet pipe penetrating the inverted hydraulic cylinder gate 5 and a vertical pipe extending along the height of the inverted hydraulic cylinder gate 5. In this embodiment, the water intake valve A is located on the vertical pipe, but it is not limited to this. The main pipe 31 is connected to a first branch pipe 32 and a second branch pipe 33. The first branch pipe 32 is equipped with a water filling valve B, and its outlet is located in the middle of the inverted hydraulic cylinder gate 5. The second branch pipe 33 is equipped with a sand flushing valve C, and its outlet is close to the bottom of the inverted hydraulic cylinder gate 5. The second branch pipe 33 discharges water in a vertically downward direction to flush away the silt accumulated at the bottom of the flow channel. In this embodiment, the outlet of the first branch pipe 32 extends horizontally to achieve horizontal water discharge. However, in other embodiments, the first branch pipe 32 may also discharge water in a downwardly inclined direction.

[0031] In this embodiment, the first branch pipe 32 includes a horizontal connecting pipe connected to the vertical pipe of the main pipe 31. This horizontal connecting pipe is parallel to the horizontal inlet pipe of the main pipe 31 and extends along the fluid flow direction. The horizontal connecting pipe is also connected to a vertical distribution pipe, which extends downwards in the vertical direction. At least two horizontal distribution pipes are connected to the vertical distribution pipe in its extension direction. These horizontal distribution pipes are arranged parallel to the inverted hydraulic cylinder gate 5, and each horizontal distribution pipe forms an outlet at multiple locations along the width of the inverted hydraulic cylinder gate 5 via connecting pipes. The water outlet direction is parallel to the fluid flow direction or inclined downwards relative to the fluid flow direction. This invention's first branch pipe 32, through the arrangement of the horizontal connecting pipe, vertical distribution pipe, and horizontal distribution pipe, achieves the arrangement of outlets at different heights and widths of the inverted hydraulic cylinder gate 5, meeting the need for multiple decentralized water outlets. Simultaneously, the decentralized water outlets help reduce the pressure at the outlets, thereby preventing water flow from causing impact damage to nearby equipment during filling. The water filling valve B is installed on the horizontal connecting pipe of the first branch pipe 32 and is used to control the water output of each outlet.

[0032] The second branch pipe 33 includes a vertical connecting pipe 2, which is connected to the vertical pipe of the main pipe 31. The end of the vertical pipe of the main pipe 31 is connected via a tee to the horizontal connecting pipe of the first branch pipe 32 and the vertical connecting pipe of the second branch pipe 33. The vertical connecting pipe of the second branch pipe 33 extends downward to a position near the bottom of the inverted hydraulic cylinder gate 5, and forms a vertically downward water outlet near the inverted hydraulic cylinder gate 5. A sand flushing valve C is provided at the end of the vertical connecting pipe of the second branch pipe 33 near the main pipe 31. The vertical connecting pipe of the second branch pipe 33 is also connected to at least one horizontal distribution pipe in its extension direction. This horizontal distribution pipe has at least one vertically downward water outlet distributed in both the width and thickness (parallel to the water flow direction) of the inverted hydraulic cylinder gate 5, through which the purpose of flushing silt in the flow channel is achieved. To enhance the sand flushing capacity, each outlet of the second branch pipe 33 is provided with a nozzle, which increases the impact force of the water flow.

[0033] In the vertical direction, the outlet of the first branch pipe 32 of this utility model is located near the middle of the inverted hydraulic cylinder gate 5, while the outlets of the second branch pipe 33 are both located near the bottom of the inverted hydraulic cylinder gate 5. The outlet of the first branch pipe 32 is used to achieve horizontal pressure filling, while the outlet of the second branch pipe 33 is used to flush the mud and sand in the flow channel. When performing horizontal pressure filling operation, the water intake valve A and the water filling valve B are opened at the same time, and the sand flushing valve C is closed. When sand flushing is required, the water intake valve A and the sand flushing valve C are opened, and the water filling valve B is closed.

[0034] The water filling mechanism 3 also includes several supports 34 fixed to the inverted hydraulic cylinder gate 5. These supports 34 are used to fix and position each pipe on the inverted hydraulic cylinder gate 5. Preferably, each pipe of the water filling mechanism 3 is arranged within the beam grid space of the inverted hydraulic cylinder gate 5; in other embodiments of the present invention, each pipe of the water filling mechanism 3 may also be arranged behind the inverted hydraulic cylinder gate 5. The water filling ports at the same height (same layer) in the above-mentioned water filling mechanism 3 are symmetrically distributed in the width direction of the inverted hydraulic cylinder gate 5 to ensure good water flow during filling.

[0035] To ensure optimal sand flushing effect of the water filling mechanism 3, the distance between the nozzle at the outlet of the second branch pipe 33 and the bottom of the inverted hydraulic cylinder gate 5 is determined according to the optimal target distance L for vertical sand flushing. opt choose. ,in The jet pressure is equal to the water level difference before and after the inverted hydraulic cylinder gate 5. A nozzle structure with good focusing properties is selected, and d is the nozzle diameter. When calculating the nozzle position, the water level difference before and after the inverted hydraulic cylinder gate 5 is first statistically analyzed. Based on the statistical results, the range of water level differences with the longest duration within a year is selected. The optimal target distance L is then calculated based on this range and the selected nozzle diameter. opt The range, and the distance between the nozzle at the outlet of the second branch pipe 33 and the bottom of the inverted hydraulic cylinder gate 5 is within this range.

[0036] The water filling mechanism 3 is the core hydraulic control module of the water conservancy gate system. Its core function is to achieve precise water diversion and discharge from the reservoir through the pipeline network within the gate beam, efficiently transporting upstream water to the downstream area (or conversely, regulating the tailrace flow direction). In terms of material selection, stainless steel is preferred for all key components, with compact stainless steel gate valves or butterfly valves being the preferred choice. These valves not only have excellent corrosion resistance, but their miniaturized design also perfectly adapts to the space constraints of the gate beam, while facilitating later inspection and maintenance.

[0037] The transmission mechanism 2 includes a first flexible shaft 21, a second flexible shaft 22, and a third flexible shaft 23. The drive mechanism 8 includes a first drive device 81, a second drive device 82, and a third drive device 83. One end of the first flexible shaft 21 is connected to the first drive device 81 via an upper connector A1, and the other end is connected to a water intake valve A via a lower connector A2. The first drive device controls the opening and closing of the water intake valve A via the first flexible shaft 21. The second flexible shaft 22 is connected to the second drive device 82 via an upper connector B1, and the other end is connected to a water filling valve B via a lower connector B2. The second drive device controls the opening and closing of the water intake valve A via the second flexible shaft. One end of the third flexible shaft 23 is connected to the third drive device 83 via an upper connector C1, and the other end is connected to a sand flushing valve C via a lower connector C2, thereby controlling the opening and closing of the sand flushing valve C. The connection methods of the above connectors can be keys, pins, or threads.

[0038] The first drive device 81, the second drive device 82, and the third drive device 83 are all connected to the control mechanism 1 and are all located on the maintenance platform of the hydraulic structure. The control mechanism 1 of this utility model is prior art, and includes a PLC panel, a touch screen, low-voltage electrical components, and other supporting parts, which will not be described in detail here. The control mechanism 1 drives the first drive device 81 to operate, and the first flexible shaft 21 transmits the torque of the first drive device 81 to the water intake valve A to control the opening, closing, or adjustment of the opening degree of the water intake valve A. The control of the water filling valve B and the sand flushing valve C is similar to the control of the water intake valve A; both are controlled by the control mechanism driving the drive devices to operate, and the flexible shaft transmits the torque of the drive devices to the corresponding valves to control the opening, closing, or adjustment of the valves.

[0039] The driving mechanism 2 can be driven by electric, pneumatic, hydraulic, or manual methods that can transmit torque. It can also be driven by a portable method, such as the first driving device 81, the second driving device 82, and the third driving device 83, which can be motors, handwheels, etc.

[0040] The transmission mechanism 2 also includes an operating platform mounted on a maintenance platform, which has space for accommodating flexible shafts. When connecting the valve to the drive mechanism, the first flexible shaft 21, the second flexible shaft 22, and the third flexible shaft 23 need to pass through the ground (wall), and are sealed to the ground (wall) through ground (wall) seals. The transmission mechanism 2 can also be equipped with universal joints, shaft clamps, steering gears, adapters, and other components as needed to meet the installation and use requirements of long-distance and complex transmission routes. The flexible shafts can be connected above, behind, or in front of the valve, and can also be located above, behind, or in front of the gate.

[0041] The diameter of each flexible shaft of this utility model is calculated with reference to the following formula: .

[0042] In the above formula, Calculated torque transmitted by the flexible shaft; This is the torque required to be transmitted from the driven end of the flexible shaft; The maximum torque that the flexible shaft can transmit is twice the rated working torque. This refers to the rated speed of the flexible shaft. This refers to the operating speed of the flexible shaft; This is the overload factor for the flexible shaft; This refers to the steering coefficient of the flexible shaft. η is the coefficient for flexible shaft support; η is the efficiency of the flexible shaft drive.

[0043] The transmission mechanism 2 is the core power transmission device of this utility model. Its function is to efficiently transmit torque over long distances, precisely control the opening and closing and adjustment of the valves of the water filling mechanism, and realize the intake, interception or flow regulation of water sources upstream and downstream of the gate. Its core component, the flexible shaft, adopts a multi-layer reverse-wound spring steel wire structure. The outer layer of coarse steel wire and the inner layer of fine steel wire form mechanical complementarity. After special processing, it has bidirectional anti-torsion characteristics and significantly reduces the torsional hysteresis angle. Optional metal or rubber sleeves can be installed to achieve dual protection—reducing friction loss through lubrication and effectively preventing scale deposition, ensuring long-term stable operation of the transmission system under complex hydrological conditions. In addition, a sleeve can be selectively installed on the outside of the flexible shaft for lubrication and scale prevention protection. The sleeve material can be metal or rubber.

[0044] The control mechanism is the intelligent hub of this invention, integrating three core functions: remote control, power regulation, and safety protection. The system uses a PLC as its control core, paired with a touchscreen human-machine interface. It achieves precise command transmission through low-voltage electrical components and integrates modules such as a drive mechanism (selectable in electric, pneumatic, hydraulic, and manual modes) and a high-precision water level gauge, forming a closed-loop control system.

[0045] The control mechanism 1 of this utility model can set the water filling flow rate during water filling according to the following formula. and filling time .

[0046]

[0047]

[0048]

[0049] In the above formula, The flow coefficient of the pipeline system; The total flow area of ​​water-filling valve B; For the flow channel volume; It is the acceleration due to gravity; This is the head loss coefficient along the pipe, which is related to the pipe diameter and the pipe roughness. For the transmission coefficients of flexible and rigid shafts, The water level elevation of the reservoir area, This refers to the elevation of the channel water level.

[0050] When the inverted hydraulic cylinder gate water filling device of this utility model is in operation, when the inverted hydraulic cylinder gate 5 is in the water-blocking state, the flow channel is emptied, and the flow channel maintenance work is completed, water is filled into the flow channel. First, log into the PLC control system of the control mechanism and enter the water level elevation of the reservoir area. Channel water level elevation Set water filling time The PLC controls the drive mechanism to open the water intake valve A via the first flexible shaft and the water filling valve B via the second flexible shaft. The opening degrees of the water intake valve A and the water filling valve B are adjusted according to the set water filling time and flow rate. Water is then filled according to the set water filling time. When the water filling time ends and the water level in the channel reaches the set level, the PLC controls the drive mechanism to transmit torque to the water filling mechanism 3 via the transmission mechanism 2. This closes the water intake valve A and the water filling valve B at the water filling mechanism position, ending the water filling process. The water filling mechanism 3 is then in a stopped state, and the gate can be raised to the fully open position.

[0051] When the gate rises to the fully open position, the connection between the lower connector of the flexible shaft and the valve of the water filling mechanism can be disconnected, and the flexible shaft can be retracted to the maintenance platform. Simultaneously, the upper connector of the flexible shaft can also be separated from the drive mechanism 8. When the gate descends again to block water, the lower connector of the flexible shaft and the valve can be quickly connected, and the upper connector can be quickly connected to the drive mechanism 8. Specifically, with the inverted cylinder gate locked on the maintenance platform and the water intake valve A, water filling valve B, and sand flushing valve C fully closed, the lower connector of the flexible shaft is connected to the valve of the water filling mechanism, while avoiding entanglement of the flexible shaft. After the hoist operates, the gate descends, and the flexible shaft is simultaneously lowered into the gate slot. When the inverted cylinder gate descends to the fully closed position, the hoist stops, and the control mechanism is connected to the upper connector of the flexible shaft.

[0052] When the inverted hydraulic cylinder gate 5 is in the water-blocking state and the flow channel needs to be dredged, the control mechanism controls the drive mechanism to operate, and the drive mechanism fully opens both the water intake valve A and the sand flushing valve C to achieve the purpose of sand flushing.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A water-filling device for an inverted hydraulic cylinder gate, characterized in that: The system includes a water-filling mechanism fixed to an inverted hydraulic cylinder gate. This mechanism comprises a main pipe passing through the inverted hydraulic cylinder gate and two branch pipes connected to the end of the main pipe. The main pipe is equipped with a water intake valve, the first branch pipe with a water filling valve, and the second branch pipe with a sand-flushing valve. The first branch pipe has an outlet at its end that allows water to flow horizontally or downwards. The second branch pipe has a nozzle at its end that allows water to flow vertically downwards. The outlet of the first branch pipe is located in the middle of the inverted hydraulic cylinder gate to achieve water filling, while the nozzle at the end of the second branch pipe is positioned near the lower end of the inverted hydraulic cylinder gate to achieve sand flushing. The water intake valve, water filling valve, and sand-flushing valve are each connected to a corresponding drive device via a flexible shaft. The drive device is fixed to a maintenance platform, which is also equipped with a control mechanism for controlling the operation of the drive device.

2. The inverted hydraulic cylinder gate water filling device according to claim 1, characterized in that: The distance between the nozzle at the outlet of the second branch pipe and the bottom of the inverted hydraulic cylinder gate is located at the optimal target distance L calculated based on the water level difference before and after the inverted hydraulic cylinder gate. opt Within the range, , where P is the jet pressure, which is equal to the water level difference before and after the inverted hydraulic cylinder gate, and d is the nozzle diameter.

3. The inverted hydraulic cylinder gate water filling device according to claim 1 or 2, characterized in that: The main pipeline includes a horizontal inlet pipe that passes through the inverted hydraulic cylinder gate and a vertical pipe that extends along the height direction of the inverted hydraulic cylinder gate. The water intake valve is located on the vertical pipe. The end of the vertical pipe is connected to the first branch pipeline and the second branch pipeline through a tee.

4. The inverted hydraulic cylinder gate water filling device according to claim 3, characterized in that: The first branch pipe includes a horizontal connecting pipe connected to the main pipe, a filling valve located on the horizontal connecting pipe, the horizontal connecting pipe extending vertically with an inverted hydraulic cylinder gate and its end connected to a vertical distribution pipe, the vertical distribution pipe being connected to at least two horizontal distribution pipes extending parallel to the inverted hydraulic cylinder gate, each horizontal distribution pipe forming multiple outlets in its extension direction.

5. The inverted hydraulic cylinder gate water filling device according to claim 4, characterized in that: The second branch pipe includes a vertical connecting pipe, on which a sand flushing valve is installed. The lower end of the vertical connecting pipe is connected to a vertical distribution pipe and a horizontal distribution pipe respectively via a tee. The end of the vertical distribution pipe is provided with a nozzle. The horizontal distribution pipe has at least one vertically downward nozzle distributed in both the direction parallel to and perpendicular to the inverted hydraulic cylinder gate.

6. The inverted hydraulic cylinder gate water filling device according to any one of claims 1-2 and 4-5, characterized in that: The water filling mechanism also includes supports for fixing each pipe within the inverted hydraulic cylinder gate beam.

7. The inverted hydraulic cylinder gate water filling device according to claim 6, characterized in that: The control mechanism can control the water filling time and water flow rate, thereby achieving channel water level control.

8. The inverted hydraulic cylinder gate water filling device according to claim 6, characterized in that: When the flow channel needs to be filled with water, the water intake valve and the water filling valve are opened, and the sand flushing valve is closed; when the flow channel needs to be flushed with sand, the water intake valve and the sand flushing valve are fully opened, and the water filling valve is closed.

9. The inverted hydraulic cylinder gate water filling device according to claim 8, characterized in that: During the water filling process, the control mechanism can control the drive device to adjust the valve opening through the flexible shaft.

10. The inverted hydraulic cylinder gate water filling device according to claim 8, characterized in that: When the gate rises to the fully open position, the connection between the flexible shaft and the water filling mechanism valve is released, the flexible shaft is retracted to the maintenance platform, and the connection between the flexible shaft and the drive device is also released; when the gate needs to be lowered to block water again, the flexible shaft is connected to the water filling mechanism valve before the gate is lowered, and the flexible shaft is connected to the drive device when the gate is lowered to the fully closed position.

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