Dirt blocking row device in front of dam of hydropower station

Abstract

The invention relates to the technical field of water conservancy and hydropower engineering facilities, in particular to a hydropower station dam front trash holding row device which comprises a hydropower station dam body and a water passing opening in the hydropower station dam body and further comprises an overall supporting frame, a trash holding row assembly, a net body pushing assembly, a cleaning brush and a power supply assembly. The overall supporting frame is fixed to the water passing opening and provides stable supporting. The trash holding row assembly is rotationally installed in the frame, and the trash holding function is achieved. The net body pushing assembly drives the trash holding row assembly to move; the cleaning brush is located beside a rotating path of the trash holding row assembly to achieve automatic cleaning; the power supply assembly adopts photovoltaic power supply, and energy consumption is reduced. Automatic cleaning of the trash holding row is achieved, trash holding is not interrupted during cleaning, supporting is stable, impact resistance is high, the graded trash holding effect is good, energy consumption is low, applicability is wide, maintenance is convenient, and safe and stable operation of a hydropower station can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering facilities technology, specifically to a sewage interception and discharge device in front of a hydropower station dam. Background Technology

[0002] During the operation of a hydropower station, the water flow often carries floating debris such as tree branches, weeds, and domestic waste. If these floating debris enters the water passage of the hydropower station with the water flow, it can easily block the water flow channel and affect the normal power generation efficiency of the hydropower station. At the same time, floating debris may also cause impact and wear to core equipment such as turbines, shorten the service life of the equipment, and increase maintenance costs. Therefore, installing a debris interception and discharge device at the water passage of the hydropower station dam is one of the key measures to ensure the safe and stable operation of the hydropower station.

[0003] Existing wastewater interception devices in hydropower station dams are mostly fixed mesh structures. While they can achieve basic wastewater interception functions, they have the following drawbacks: Firstly, the debris screen is submerged in water for a long time, and algae, silt and tangled floating objects easily adhere to its surface. If it is not cleaned in time, it will gradually block the mesh of the debris screen, resulting in a decrease in the flow rate of water, which will further affect the power generation efficiency and even cause the safety hazard of high water level. Secondly, the existing cleaning methods are mostly manual cleaning or overall dismantling and cleaning with the help of external hoisting equipment. Manual cleaning is labor-intensive and inefficient, and there are high safety risks in operating in the dam area with rapid water flow. Overall dismantling and cleaning will cause the pollution interception function to be interrupted, affecting the normal operation of the hydropower station. Third, the existing debris interception and discharge device has insufficient support structure stability, and is prone to deformation and displacement under the impact of strong water flow, which affects the debris interception effect; Fourth, some sewage interception and discharge devices with automatic cleaning functions require external power grid supply, which increases energy consumption. Moreover, in hydropower stations in remote mountainous areas, the power grid supply stability is poor, which can easily cause the device to malfunction.

[0004] In view of the problems existing in the above-mentioned technologies, there is an urgent need to design a sewage interception device in front of the dam of a hydropower station with automatic cleaning function, stable support, low energy consumption and uninterrupted sewage interception function during the cleaning process, so as to solve the technical defects of the sewage interception device in the existing technology, such as inconvenient cleaning, unstable support, high energy consumption and interruption of sewage interception function during cleaning. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a debris interception device in front of a hydropower station dam. This device overcomes the shortcomings of existing debris interception devices in hydropower station dams, such as inconvenient cleaning, unstable support, high energy consumption, and easy interruption of debris interception function during cleaning. It achieves automatic cleaning of the debris interception device, ensures uninterrupted debris interception function during cleaning, improves the stability of the support structure, reduces energy consumption, and ensures the safe and stable operation of the hydropower station.

[0006] A debris discharge device for a hydropower station dam includes the dam body and the water passage opening on it, and further includes: The overall support frame is fixedly installed at the opening of the hydropower station dam body; The debris interception assembly is rotatably installed within the overall support frame and is used to intercept floating objects in the water flow; The net body driving component is installed on the overall support frame, and its output end is connected to the drive of the sewage barrier component to drive the sewage barrier component to rotate. A cleaning brush is fixedly installed on the overall support frame and located next to the rotation path of the sewage barrier assembly, and is used to remove the deposits on the sewage barrier assembly when it rotates; A power supply component, located on the dam of the hydropower station, is used to provide power to the grid driving component.

[0007] Preferably, the overall support frame includes two sets of support vertical plates that are fixed by bolts and symmetrically arranged on both sides of the opening, and a connecting frame that is fixedly connected to the top of the two sets of support vertical plates. Vertical moving limit rails are provided on the inner sides of the two sets of support vertical plates. Multiple sets of fixed cones are fixedly connected to the lower ends of both sets of supporting vertical plates, and a control box with an opening and closing door is fixedly connected to the upper end of the connecting frame. A controller is fixedly connected inside the control box.

[0008] Preferably, the debris interception assembly includes a main debris interception net, and guide components are provided on both sides of the main debris interception net. The guide components slide in cooperation with the movable limiting track, so that the main debris interception net can rotate along it, and the guide components are ball bearings.

[0009] Preferably, at least two layers of sewage discharge net frames distributed along the height direction are fixedly connected to the outer side of the main sewage net. The sewage discharge net frames include a large first sewage discharge net frame located below and a small second sewage discharge net frame located above, and the interiors of the first sewage discharge net frame and the second sewage discharge net frame are both arranged with inclined surfaces.

[0010] Preferably, the mesh pushing assembly includes a drive motor, a bidirectional lead screw fixed to and driving the output shaft of the drive motor to rotate, and two internal thread sleeves symmetrically threaded on two opposite threads of the bidirectional lead screw. The bidirectional lead screw and drive motor are housed in a drive box fixed to the lower end of the connecting frame, and the drive motor is fixedly connected to the drive box. One end of the bidirectional lead screw is rotatably connected to the inner wall of the drive box.

[0011] Preferably, the net pushing assembly further includes a connecting horizontal plate fixed to the rear end of the main debris net and a pushing vertical plate fixedly connected to the upper end of the connecting horizontal plate; the outer sides of the two internal threaded sleeves are respectively hinged to the top ends of the pushing vertical plate through a pushing hinge plate, thereby converting the rotational motion of the bidirectional screw into the lifting motion of the pushing vertical plate, thereby driving the main debris net to rotate; Furthermore, the lower end of the drive box is provided with a push-limiting transverse groove, and the two sets of internal threaded sleeves are slidably connected inside the push-limiting transverse groove.

[0012] Preferably, at least one lifting limit horizontal plate is fixedly connected to the pushing vertical plate, and a vertical lifting limit groove is correspondingly opened on the hydropower station dam body, and the lifting limit horizontal plate is slidably embedded in the lifting limit vertical groove.

[0013] Preferably, each of the two sets of supporting vertical plates has a dirt-blocking protection plate fixedly connected to its front end. The cleaning brush is horizontally fixed between the two sets of dirt-blocking protection plates by bolts, and the brush bristles of the cleaning brush face the rising surface of the dirt-blocking and draining assembly.

[0014] Preferably, the power supply component includes a mounting frame bolted to the top of the hydropower station dam and photovoltaic panels bolted to the mounting frame.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention uses a net-driven component to drive the debris-blocking assembly to move up and down. With the help of a fixed cleaning brush, the surface debris can be automatically cleaned during the upward movement of the debris-blocking assembly. Manual cleaning is only required from one side, reducing labor intensity and operational risks. At the same time, the main debris-blocking net is always at the water passage opening during the cleaning process, which can continuously achieve the debris-blocking function and avoid the problem of debris-blocking interruption caused by disassembly and cleaning in the prior art, thus ensuring the normal operation of the hydropower station.

[0016] 2. The overall support frame adopts a symmetrically arranged support vertical plates and a top connecting frame to form a frame structure. The lower end of the support vertical plates is embedded into the foundation through a fixed cone, which improves the stability of the overall structure. At the same time, the debris interception and discharge component cooperates with the moving limit track of the support vertical plate through ball bearings, and pushes the vertical plate through the lifting limit horizontal plate and the lifting limit vertical groove of the dam body. The multi-limit guide structure ensures the stability of the debris interception and discharge component during movement, so that the device is not easily deformed or displaced under the impact of strong water flow, and ensures the debris interception effect.

[0017] 3. A large-sized first sewage discharge frame and a small-sized second sewage discharge frame are set on the outside of the main sewage net to achieve graded interception of floating objects of different sizes, avoiding the problem of incomplete sewage interception or easy clogging caused by a single mesh size; the inside of the sewage discharge frame adopts an inclined surface design to facilitate the cleaning of impurities by staff.

[0018] 4. Powered by photovoltaic panels, it eliminates the need for external power grid connection, fully utilizes clean energy, and reduces energy consumption and operating costs. Furthermore, it is suitable for hydropower stations in remote mountainous areas where power grid supply is unstable, expanding the applicability of the device and ensuring stable operation in various environments.

[0019] 5. Most components are connected by bolts, which facilitates disassembly, installation and maintenance; key drive components such as drive motor and double lead screw are housed in drive box, and easily worn parts such as cleaning brush and sewage discharge frame have simple structure and are easy to replace, reducing maintenance costs. Attached Figure Description

[0020] Figure 1 This is an exploded view of a wastewater interception and discharge device in front of a hydropower station dam, provided in an embodiment of this application. Figure 2 This is a schematic diagram of the overall structure of a sewage interception and discharge device in front of a hydropower station dam, provided in an embodiment of this application. Figure 3 This is a rear view of a wastewater interception and discharge device in front of a hydropower station dam, provided in an embodiment of this application; Figure 4 This is a schematic diagram of the overall support frame in a debris interception and discharge device in front of a hydropower station dam, provided in an embodiment of this application. Figure 5 This is a side and rear view of the integral support frame in a sewage interception and discharge device in front of a hydropower station dam, provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a debris discharge assembly in a debris discharge device in front of a hydropower station dam, provided in an embodiment of this application; Figure 7 This is a schematic diagram of the cleaning brush structure in a debris interception and drainage device in front of a hydropower station dam, provided in an embodiment of this application. Figure 8 This is a schematic diagram of the structure of the net body pushing component in a sewage interception and discharge device in front of a hydropower station dam, provided in an embodiment of this application; Figure 9 This is a cross-sectional view of the net pushing component in a debris interception and discharge device in front of a hydropower station dam, provided in an embodiment of this application; In the picture: 1. Hydropower station dam body; 2. Overall support frame; 3. Net body pushing component; 4. Sewage interception and discharge component; 5. Cleaning brush; 6. Power supply component; 21. Supporting vertical plate; 22. Connecting frame; 23. Control box; 24. Sewage barrier protection plate; 25. Moving limit track; 26. Lifting limit vertical groove; 31. Drive box; 32. Drive motor; 33. Bidirectional lead screw; 34. Internal threaded sleeve; 35. Pushing hinge plate; 36. Pushing vertical plate; 37. Connecting horizontal plate; 38. Lifting limit horizontal plate; 41. Ball bearing; 42. Barrier net; 43. First sewage discharge net frame; 44. Second sewage discharge net frame; 61. Installation I-beam; 62. Photovoltaic panel Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0022] Example 1

[0023] Please see Figures 1-9 This embodiment provides a wastewater interception and discharge device in front of a hydropower station dam, including... It includes the hydropower station dam body 1 and the water passage opening on it, as well as the overall support frame 2, the sewage interception and discharge assembly 4, the net body pushing assembly 3, the cleaning brush 5, and the power supply assembly 6.

[0024] The specific structure of the overall support frame 2: The overall support frame 2 is fixedly installed at the water passage opening of the hydropower station dam body 1 by expansion bolts. It includes two sets of symmetrically arranged support vertical plates 21 and connecting frames 22. The two sets of support vertical plates 21 are fixed to the left and right sides of the water passage opening by bolts, and the connecting frames 22 are fixedly connected to the top of the two sets of support vertical plates 21 by welding to form a stable portal frame structure. Vertical moving limit rails 25 are provided on the inner sides of the two sets of supporting vertical plates 21. The moving limit rails 25 are circular rail structures. Four sets of fixing cones are welded to the lower ends of the two sets of supporting vertical plates 21. The fixing cones are conical structures. During installation, they are inserted into the concrete foundation below the dam body and fixed by concrete pouring, which further improves the impact resistance stability of the supporting vertical plates 21. The upper end of the connecting frame 22 is fixedly connected to the control box 23 by bolts. The front of the control box 23 is provided with an opening and closing door. A sealing strip is provided between the opening and closing door and the control box 23 to improve waterproof performance. The controller is fixed inside the control box 23 by bolts. The controller is a PLC controller, model S7-200SMART.

[0025] The specific structure of the debris barrier assembly 4: The debris barrier assembly 4 includes a main debris barrier net 42, which is made of 304 stainless steel with a mesh size of 5cm×5cm and an electrophoretic anti-corrosion treatment on the surface. The left and right sides of the main debris screen 42 are fixed with ball bearing seats by bolts. Ball bearings 41 are rotatably connected in the ball bearing seats. The ball bearings 41 are made of wear-resistant ceramic material. The ball bearings 41 are inserted into the annular groove of the moving limit track 25 and slide with the moving limit track 25, so that the main debris screen 42 can be vertically raised and lowered along the moving limit track 25. Two layers of sewage discharge frames are bolted to the outside of the main sewage net 42: a first sewage discharge frame 43 at the bottom and a second sewage discharge frame 44 at the top. The first sewage discharge frame 43 measures 2m × 1m with a mesh size of 10cm × 10cm, while the second sewage discharge frame 44 measures 1.5m × 0.8m with a mesh size of 3cm × 3cm. Inclined plates are welded to the inside of both the first and second sewage discharge frames 43 and 44. The angle between the inclined plates and the horizontal plane is 30°, which facilitates the sliding of floating objects to one side, making it easier for workers to handle them.

[0026] The specific structure of the net body pushing component 3: The net body pushing component 3 includes a drive motor 32, a two-way lead screw 33, two internal threaded sleeves 34, a pushing hinge plate 35, a pushing vertical plate 36, a connecting horizontal plate 37, and a lifting and limiting horizontal plate 38; The drive motor 32 is a stepper motor, model 57BYG250H. The drive motor 32 is bolted to one side of the inside of the drive housing 31, which is bolted to the lower end of the connecting bracket 22. The drive housing 31 is made of stainless steel with an anti-corrosion treatment. One end of the bidirectional lead screw 33 is fixedly connected to the output shaft of the drive motor 32 via a coupling, and the other end is rotatably connected to the inner wall of the drive housing 31 via a bearing. The bidirectional lead screw 33 has two sections of threads with opposite directions of rotation. Two internal threaded sleeves 34 are respectively threaded onto the two sections of the bidirectional lead screw 33. On the opposite thread, the outer side of the inner thread sleeve 34 is hinged to one end of the push hinge plate 35 via a pin, and the other end of the push hinge plate 35 is hinged to the top two ends of the push vertical plate 36 via a pin, thereby converting the rotational motion of the bidirectional screw 33 into the lifting motion of the push vertical plate 36, which in turn drives the main debris screen 42 to rotate; the lower end of the drive box 31 is provided with a push limiting transverse groove, and the inner thread sleeve 34 is slidably connected in the push limiting transverse groove; the connecting transverse plate 37 is fixed to the middle of the rear end of the main debris screen 42 by bolts, and the push vertical plate 36 is fixed to the upper end of the connecting transverse plate 37 by welding; A lifting limit horizontal plate 38 is fixed to both the left and right sides of the vertical plate 36 by bolts. A vertical lifting limit groove 26 is correspondingly opened on the dam body 1 of the hydropower station. The lifting limit horizontal plate 38 is slidably embedded in the lifting limit vertical groove 26. A rubber sealing gasket is provided between the lifting limit horizontal plate 38 and the lifting limit vertical groove 26 to ensure smooth sliding and also to play a waterproof role.

[0027] The specific structure of the cleaning brush 5: The front ends of the two sets of supporting vertical plates 21 are fixed with dirt-blocking protection plates 24 by bolts. The dirt-blocking protection plates 24 are made of stainless steel and are set perpendicular to the supporting vertical plates 21. The cleaning brush 5 is fixed horizontally between the two sets of dirt-blocking protection plates 24 by bolts. The cleaning brush 5 includes a brush base and brush bristles. The brush base is made of aluminum alloy and the brush bristles are made of nylon elastic wear-resistant material. The length of the brush bristles is 8cm. The brush bristle surface faces the rising surface of the main dirt-blocking net 42. The gap between the brush bristles and the surface of the main dirt-blocking net 42 is -1cm.

[0028] The specific structure of the power supply component 6: The power supply component 6 includes a mounting frame 61 and photovoltaic panels 62. The mounting frame 61 is fixedly installed on the platform above the dam body 1 of the hydropower station by expansion bolts. The mounting frame 61 is made of angle steel welded together. The photovoltaic panels 62 are monocrystalline silicon photovoltaic panels, model 250W. The photovoltaic panels 62 are bolted and laid on the mounting frame 61. There are 4 photovoltaic panels 62 connected in series. The photovoltaic panels 62 are electrically connected to the controller. The controller integrates a photovoltaic charging management module and a motor drive module. The photovoltaic charging management module is connected to an energy storage battery. The energy storage battery is a lithium battery, model 12V / 100Ah, used to store the electrical energy generated by the photovoltaic panels 62. The motor drive module is electrically connected to the drive motor 32 and controls the operation of the drive motor 32.

[0029] When using this invention, Contamination interception process: After the device is installed, the main contamination net 42 is in the initial position. When the water flows through the water opening, the main contamination net 42 intercepts floating objects in the water flow.

[0030] Automatic cleaning process: When a large amount of debris adheres to the surface of the debris barrier assembly 4, the controller starts the drive motor 32 through a timed cleaning program set by the controller or a manual cleaning command. The drive motor 32 drives the bidirectional screw 33 to rotate. Since the two threads on the bidirectional screw 33 rotate in opposite directions, the two internal threaded sleeves 34 move relative to each other along the pushing limit transverse groove under the drive of the bidirectional screw 33. This pushes the vertical plate 36 upward through the hinge plate 35. The vertical plate 36 drives the main debris barrier 42 to rotate through the connecting horizontal plate 37. During the rotation of the main debris barrier 42, the bristles of the cleaning brush 5 contact the surface of the main debris barrier 42. The system thoroughly contacts and scrapes away attached algae, silt, and entangled floating debris. The scraped-off floating debris and other floating debris on the water surface are intercepted by the first and second drainage net frames 43 and 44. Under the action of the inclined surface, the floating debris slides to one side. Workers use tools to clean the floating debris inside the first and second drainage net frames 43 and 44. After cleaning, the workers operate the controller to control the drive motor 32 to reverse, which drives the bidirectional lead screw 33 to rotate in the opposite direction, causing the two internal threaded sleeves 34 to move in the opposite direction. This pushes the hinge plate 35 to pull the vertical plate 36 downward, causing the main debris screen 42 to reset, completing one automatic cleaning process.

[0031] Power supply process: Under sunlight, the photovoltaic panel 62 converts solar energy into electrical energy, and charges the energy storage battery through the photovoltaic charging management module in the controller. The energy storage battery provides a stable power supply to the controller and drive motor 32, realizing the recycling of clean energy.

[0032] The detailed description of known functions and components is omitted in this disclosure. For example, the drive motor and controller are existing devices or equipment, or devices or equipment that can be implemented by existing technology. Their power supply, specific composition and principle are clear to those skilled in the art, so they will not be described in detail. In order to ensure the compatibility of the equipment, the operating methods adopted are consistent with the parameters of commercially available instruments.

[0033] In this solution, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this solution according to the specific circumstances.

[0034] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A wastewater interception and discharge device in front of a hydropower station dam, comprising the hydropower station dam body (1) and a water passage opening thereon, characterized in that, Also includes: The overall support frame (2) is fixedly installed at the opening of the hydropower station dam body (1); The debris interception assembly (4) is rotatably installed inside the overall support frame (2) for intercepting floating objects in the water flow; The net body pushing component (3) is installed on the overall support frame (2), and its output end is connected to the sewage discharge assembly (4) for driving the sewage discharge assembly (4) to rotate. A cleaning brush (5) is fixedly installed on the overall support frame (2) and located next to the rotation path of the sewage discharge assembly (4), and is used to remove the attached substances on the sewage discharge assembly (4) when it rotates; The power supply component (6) is located on the dam body (1) of the hydropower station and is used to provide power to the grid driving component (3).

2. The sewage interception and discharge device in front of a hydropower station dam according to claim 1, characterized in that, The overall support frame (2) includes two sets of support vertical plates (21) fixed by bolts and symmetrically arranged on both sides of the opening, and a connecting frame (22) fixedly connected to the top of the two sets of support vertical plates (21). Vertical moving limit rails (25) are provided on the inner sides of the two sets of support vertical plates (21). The lower ends of the two sets of supporting vertical plates (21) are fixedly connected to multiple sets of fixed cones, and the upper end of the connecting frame (22) is fixedly connected to a control box (23) with an opening and closing door. The controller is fixedly connected inside the control box (23).

3. A wastewater interception and discharge device in front of a hydropower station dam according to claim 2, characterized in that, The debris interception assembly (4) includes a main debris interception net (42), and guide components are provided on both sides of the main debris interception net (42). The guide components slide in cooperation with the moving limiting track (25) so that the main debris interception net (42) can rotate along it, and the guide components are ball bearings (41).

4. A wastewater interception and discharge device in front of a hydropower station dam according to claim 3, characterized in that, The main sewage net (42) is fixedly connected to at least two layers of sewage discharge net frames distributed along the height direction. The sewage discharge net frames include a large first sewage discharge net frame (43) located below and a small second sewage discharge net frame (44) located above. The interiors of the first sewage discharge net frame (43) and the second sewage discharge net frame (44) are both set with inclined surfaces.

5. A sewage interception and discharge device in front of a hydropower station dam according to claim 2, characterized in that, The mesh pushing assembly (3) includes a drive motor (32), a bidirectional lead screw (33) fixed to the output shaft of the drive motor (32) and driving it to rotate, and two internal thread sleeves (34) symmetrically threaded on two opposite threads of the bidirectional lead screw (33). The bidirectional lead screw (33) and drive motor (32) are housed in a drive box (31) fixed to the lower end of the connecting frame (22), and the drive motor (32) is fixedly connected to the drive box (31). One end of the bidirectional lead screw (33) is rotatably connected to the inner wall of the drive box (31).

6. A sewage interception and discharge device in front of a hydropower station dam according to claim 5, characterized in that, The net pushing assembly (3) also includes a connecting horizontal plate (37) fixed to the rear end of the main debris net (42) and a pushing vertical plate (36) fixedly connected to the upper end of the connecting horizontal plate (37); the outer sides of the two internal threaded sleeves (34) are respectively hinged to the top ends of the pushing vertical plate (36) through a pushing hinge plate (35), thereby converting the rotational motion of the bidirectional screw (33) into the lifting motion of the pushing vertical plate (36) to drive the main debris net (42) to rotate; Furthermore, the lower end of the drive box (31) is provided with a push-limiting transverse groove, and the two sets of internal threaded sleeves (34) are slidably connected inside the push-limiting transverse groove.

7. A wastewater interception and discharge device in front of a hydropower station dam according to claim 6, characterized in that, At least one lifting limit horizontal plate (38) is fixedly connected to the pushing vertical plate (36), and a vertical lifting limit vertical groove (26) is correspondingly opened on the hydropower station dam body (1), and the lifting limit horizontal plate (38) is slidably embedded in the lifting limit vertical groove (26).

8. A wastewater interception and discharge device in front of a hydropower station dam according to claim 2, characterized in that, Both sets of support vertical plates (21) are fixedly connected to a dirt-blocking protection plate (24) at their front ends. The cleaning brush (5) is horizontally fixed between the two sets of dirt-blocking protection plates (24) by bolts. The brush bristles of the cleaning brush (5) face the rising surface of the dirt-blocking and draining assembly (4).

9. A sewage interception and discharge device in front of a hydropower station dam according to claim 1, characterized in that, The power supply component (6) includes a mounting frame (61) bolted to the top of the hydropower station dam (1) and photovoltaic panels (62) bolted to the mounting frame (61).

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