Automatic slag removal system and method for trash holding row of hydraulic turbine set

Abstract

The invention belongs to the technical field of floating object cleaning, and relates to an automatic slag removal system and method for a trash holding row of a hydraulic turbine set. Through the elastic tensioning structure of the elastic cable, the position of the system can be dynamically adjusted under the impact of water flow; the kinetic energy of water flow is efficiently converted into rotating power of the slag removal scraper through the power paddle, and the problem that a traditional mechanical driving device is high in energy consumption is solved; floating garbage can be effectively captured and pushed in the water flow direction through a plurality of slag removal scraping plates until the floating garbage is collected in the centralized collection module; the angle of the elastic cable can be adjusted along with swinging of the trash holding row of the hydraulic turbine set through the flexible connecting mechanism, and then the slag removal scraper is allowed to flexibly swing in the horizontal direction and the vertical direction so as to adapt to deformation of the irregular flexible trash holding row. 24-hour full-automatic slag removal can be achieved, the slag removal efficiency is improved, external power supply is not needed, and the device is suitable for various complex water area environments.

Description

Technical Field

[0001] The present invention belongs to the technical field of floating object cleaning, and relates to an automatic slag cleaning system and method for a trash rack of a water turbine unit. Background Art

[0002] During the operation of a water turbine unit, the trash rack is one of the key facilities to ensure the normal operation of the unit. The water inlet of the water turbine unit is often located in the water flow area of a river, lake or other water sources, and these waters often contain a large amount of floating objects, such as wood, plastic garbage, plant residues and other sundries. If these garbage and sundries enter the flow channel of the unit, they may block the water inlet channel of the water turbine, resulting in poor water flow, and may even damage the mechanical equipment inside the unit, thus affecting the power generation efficiency and even causing long-term failures of the equipment. Therefore, a trash rack is usually arranged upstream of the water inlet of the water turbine unit to prevent sundries from entering the flow channel of the unit and protect the safe operation of the equipment.

[0003] At present, most water turbine units adopt the method of manual slag cleaning to remove the garbage and sundries on the trash rack. Manual slag cleaning is generally carried out by a small slag dredger or manual tools. Workers usually need to be close to the area of the water inlet of the water turbine to carry out the work of fishing and removing garbage and sundries. This slag cleaning method has multiple problems. First, the efficiency is low. Since the operation of the slag dredger takes a certain amount of time, and it is impossible to ensure that all sundries on the trash rack are completely removed during the cleaning process, multiple operations are often required to clean it up, resulting in a waste of time. Second, the manual slag cleaning method has time limitations. Since the working location is close to the water inlet of the water turbine and the water flow velocity in the water area is relatively fast, manual slag cleaning can usually only be carried out during the period of small water flow during the day, resulting in limited working hours. In addition, due to factors such as complex water area environment and changeable weather, the timeliness and safety of manual slag cleaning are difficult to guarantee.

[0004] In addition, in the prior art, a utility model patent with the publication number CN221030021U discloses a multi-functional trash rack system, which includes a self-priming water surface trash can for collecting floating garbage on the water surface. It also includes a fixed track, a number of floating boxes, a sliding track, and a trash rack filter plate arranged in parallel. The floating boxes are arranged side by side on the fixed track and are slidably connected to the fixed track. A number of telescopic devices and motors are installed inside the floating boxes. The telescopic shafts of the telescopic devices extend outside the floating boxes, and the ends of the telescopic shafts are fixedly connected to scrapers perpendicular to the telescopic shafts. The rotating shafts of the motors extend outside the floating boxes and are located at the center of the telescopic shafts. The rotating shafts are slidably connected to the scrapers, and a number of barbs are symmetrically installed at the ends of the rotating shafts. The sliding track is arranged upstream of the floating boxes. The trash rack filter plate is connected with a towing device. The self-priming water surface trash cans are respectively arranged at both ends of the sliding track. This patent breaks up floating objects by rotating the barbs on the rotating shafts and concentrates them at the floating boxes. At the same time, it can also break ice. During collection, the scraper is pushed towards the end of the rotating shaft to line up the floating objects, and then the trash rack filter plate is pulled by the towing device to push the floating objects towards the self-priming water surface trash can for centralized collection. However, the above method still has low efficiency, requires external power supply, has high energy consumption, and increases the operating cost. Secondly, the rigid design of the floating boxes and the fixed track limits their adaptability to irregular flexible trash racks.

[0005] Based on the above background, the current slag cleaning methods for the trash racks of water turbine units have problems such as low efficiency, high operation safety risks, and limited operation time. Therefore, there is an urgent need for a more efficient, convenient, and safe automatic slag cleaning technology to ensure the continuous and safe operation of water turbine units. Summary of the Invention

[0006] The purpose of the present invention is to solve the technical problems of low slag cleaning efficiency, poor safety, and inability to adapt to irregular flexible trash racks in the prior art, and to provide an automatic slag cleaning system and method for the trash racks of water turbine units, which can achieve 24-hour full-automatic slag cleaning, improve the slag cleaning efficiency, and do not require external power supply, and are applicable to various complex water environments.

[0007] To achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides an automatic slag cleaning system for the trash racks of water turbine units, including: Elastic cables, the two ends of the elastic cables are respectively fixedly installed on the concrete dams at both ends of the trash racks of the water turbine units; the elastic cables are arranged in front of the trash racks of the water turbine units; Slag cleaners, a number of slag cleaners are arranged at intervals on the elastic cables; the slag cleaners include buoyancy barrels, slag cleaning scrapers, buoyancy rods, and power paddle wheels; the buoyancy rods are connected to the buoyancy barrels; the slag cleaning scrapers are arranged on the buoyancy barrels; the power paddle wheels are arranged on the buoyancy rods; both the slag cleaning scrapers and the power paddle wheels are arc-shaped structures; Flexible connection mechanism, the elastic cable and the buoyancy bucket are connected through the flexible connection mechanism; Centralized collection module, the centralized collection module is arranged downstream of the trash rack of the water turbine unit.

[0008] Preferably, a limiting rod is arranged between the elastic cable and the trash rack of the water turbine unit.

[0009] Preferably, a water surface floating scum baffle is arranged between the slag cleaner and the trash rack of the water turbine unit.

[0010] Preferably, both ends of the elastic cable are connected to the concrete dams at both ends of the trash rack of the water turbine unit through adjustable anchoring devices.

[0011] Preferably, the adjustable anchoring device is a bidirectional threaded adjusting rod.

[0012] Preferably, the flexible connection mechanism is a universal joint.

[0013] Preferably, the centralized collection module includes a guide plate and a centralized trough; the guide plate and the centralized trough are connected; an interception net is arranged in the centralized trough.

[0014] Preferably, a vision sensor is arranged in the centralized trough.

[0015] Preferably, the guide plate is electrically connected to the control module; a flow velocity sensor is arranged in the water flow; the flow velocity sensor is electrically connected to the control module.

[0016] In a second aspect, the present invention provides an automatic slag cleaning method for a trash rack of a water turbine unit, including the following steps: The water flow generates a thrust through the power paddle blades, driving the power paddle blades to rotate, and further driving the slag cleaning scraper to rotate around the axis of the elastic cable; when the slag cleaning scraper rotates, it pushes the floating garbage to move along the water flow direction until the floating garbage is pushed to the downstream centralized trough, and the garbage is cleaned after accumulating to a predetermined amount.

[0017] Compared with the prior art, the present invention has the following beneficial effects: Through the elastic tension structure of the elastic cable, the system can dynamically adjust its position under the impact of water flow, enhancing the adaptability and stability of the system; through the power paddle, the kinetic energy of water flow is efficiently converted into the rotational power of the slag cleaning scraper, solving the problem of high energy consumption of traditional mechanical drive devices; through multiple slag cleaning scrapers, floating garbage can be effectively captured and pushed along the water flow direction until it is collected in the centralized collection module; through the flexible connection mechanism, the elastic cable can adjust its angle with the swing of the trash rack of the water turbine unit, and then allow the slag cleaning scraper to swing flexibly in the horizontal and vertical directions to adapt to the deformation of the irregular flexible trash rack, avoiding system jamming or damage caused by the deformation of the trash rack of the water turbine unit. The system of the present invention efficiently converts the kinetic energy of water flow into the rotational power of the slag cleaning scraper through the power paddle, without external power supply, saving energy and being environmentally friendly; at the same time, it can achieve 24-hour automatic slag cleaning, not only greatly reducing the manual slag cleaning workload, but also improving the safety of the trash rack, and having wide applicability and practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of an automatic slag cleaning system for the trash rack of a water turbine unit of the present invention; Figure 2 It is a top view of the slag cleaner of the present invention; Figure 3 It is a front view of the slag cleaner of the present invention.

[0020] Among them: 1. Elastic cable; 2. Slag cleaner; 21. Buoyancy bucket; 22. Slag cleaning scraper; 23. Buoyancy rod; 24. Power paddle; 3. Flexible connection mechanism; 4. Centralized collection module; 5. Surface floating slag baffle; 6. Trash rack of water turbine unit; 61. Concrete dam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0025] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0026] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings: The first object of the present invention is to provide an automatic slag cleaning system for a trash rack of a water turbine unit, as Figure 1 shown, including: An elastic cable 1, the two ends of the elastic cable 1 are respectively fixedly installed on the concrete dams 61 at both ends of the trash rack 6 of the water turbine unit; the elastic cable 1 is arranged in front of the trash rack 6 of the water turbine unit; A slag cleaner 2, several slag cleaners 2 are arranged at intervals on the elastic cable 1; as Figure 2 and Figure 3As shown, the slag cleaner 2 includes a buoyancy barrel 21, a slag cleaning scraper 22, a buoyancy rod 23 and a power paddle 24; the buoyancy rod 23 is connected to the buoyancy barrel 21; the slag cleaning scraper 22 is arranged on the buoyancy barrel 21; the power paddle 24 is arranged on the buoyancy rod 23; both the slag cleaning scraper 22 and the power paddle 24 are arc-shaped structures; A flexible connection mechanism 3, the elastic cable 1 and the buoyancy barrel 21 are connected through the flexible connection mechanism 3; A centralized collection module 4, the centralized collection module 4 is arranged downstream of the trash rack of the water turbine unit 6.

[0028] In the automatic slag cleaning system of the trash rack of the water turbine unit of the present invention, the elastic cable 1 serves as the basic support of the whole system, can withstand the impact of water flow and the movement of the slag cleaner 2, and ensures the stable operation of the system. The slag cleaner 2 provides buoyancy through the buoyancy barrel 21, so that the slag cleaner 2 can float on the water surface and adapt to the water level change. The slag cleaning scraper 22 is designed with an arc-shaped structure to enhance the rotation efficiency under the action of thrust, effectively capture and push the floating garbage, and make it move along the water flow direction. The power paddle 24 also adopts an arc-shaped structure. When the water flow passes through the power paddle 24, a directional thrust is generated. At the same time, the buoyancy rod 23 connects the buoyancy barrel 21 and the power paddle 24, ensuring that the power paddle 24 can effectively transmit power and drive the slag cleaning scraper 22 to rotate around the elastic cable 1, so as to realize the automatic slag cleaning function.

[0029] The flexible connection mechanism 3 enables the elastic cable 1 to adjust the angle with the swing of the trash rack of the water turbine unit 6, allowing the slag cleaning scraper 22 to swing flexibly in the horizontal and vertical directions to adapt to the deformation of the irregular flexible trash rack and avoid the device jamming or damage caused by the deformation of the trash rack of the water turbine unit 6. At the same time, the elastic tension structure of the elastic cable 1 allows the device to dynamically adjust the position under the impact of water flow, further enhancing the adaptability and stability of the system. In addition, the centralized collection module 4 is arranged downstream of the trash rack of the water turbine unit 6 for collecting the floating garbage pushed to the downstream by the slag cleaner 2.

[0030] A limiting rod is arranged between the elastic cable 1 and the trash rack of the water turbine unit 6, which can ensure that a stable distance is always maintained between the elastic cable 1 and the trash rack of the water turbine unit 6 after the slag cleaner 2 is installed, effectively avoiding the elastic cable 1 getting too close to or too far away from the trash rack of the water turbine unit 6 due to the impact of water flow or the movement of the slag cleaner 2, so as to ensure that the slag cleaner 2 can carry out the slag cleaning operation at the best position and angle. The setting of the limiting rod not only enhances the stability of the system, but also improves the slag cleaning efficiency, and at the same time reduces the equipment wear or failure caused by improper distance.

[0031] A water surface floating scum baffle 5 is arranged between the slag cleaner 2 and the trash rack of the water turbine unit 6, which can prevent floating garbage from bypassing the slag cleaner 2 and entering the gaps of the trash rack of the water turbine unit 6, not only improving the slag cleaning efficiency, but also reducing the workload of subsequent cleaning and maintenance.

[0032] Both ends of the elastic cable 1 are connected to the concrete dams 61 at both ends of the trash rack of the water turbine unit 6 through adjustable anchoring devices. The adjustable anchoring device is a bidirectional threaded adjusting rod. Through the adjustable anchoring device, the tension of the elastic cable 1 can be adjusted according to the water level change to ensure that the device is always in the best working position and adapts to different working conditions.

[0033] The centralized collection module 4 includes a guide plate and a centralized trough; the guide plate is connected to the centralized trough; an interception net is arranged in the centralized trough. Through the synergistic effect of the guide plate and the centralized trough, floating garbage is concentrated into the interception net to realize the automatic collection of garbage. When the garbage accumulates to a certain amount, it can be cleaned by a slag dredger automatically or semi-automatically, thus realizing efficient and continuous garbage collection and treatment.

[0034] A visual sensor is arranged in the centralized trough for real-time monitoring of the accumulation height of garbage. When the accumulation height of garbage reaches a preset threshold, the visual sensor will trigger a signal to automatically start the slag dredger for cleaning, realizing the real-time monitoring of the garbage accumulation amount, reducing manual intervention through automatic control, improving the cleaning efficiency, and ensuring that the system can timely and efficiently handle floating garbage.

[0035] The guide plate is electrically connected to the control module; a flow velocity sensor is arranged in the water flow; the flow velocity sensor is electrically connected to the control module. The flow velocity of the water flow is real-time monitored by the flow velocity sensor and transmitted to the control module, and then the angle of the guide plate is automatically adjusted through the control module, thereby optimizing the flow direction and concentration effect of the garbage.

[0036] The elastic cable 1 is made of a high-strength anti-corrosion material. The high strength ensures that it can withstand the impact of the water flow and the movement of the slag cleaner 2 for a long time. At the same time, its excellent corrosion resistance enables it to adapt to complex water environment conditions and extend its service life.

[0037] The slag cleaning scraper 22 is made of a light anti-corrosion material (such as nylon reinforced composite material), and its density is lower than that of water, which can effectively avoid affecting the slag cleaning efficiency due to self-weight sinking. The nylon reinforced composite material is not only light in weight and corrosion-resistant, but also has good strength and wear resistance, which can ensure that the slag cleaning scraper 22 maintains an efficient working state during long-term use, further improving the slag cleaning effect and reliability of the system.

[0038] The second object of the present invention is to provide a method for automatically cleaning the trash rack of a water turbine unit, including the following steps: The water flow generates thrust when passing through the power paddle blades 24, driving the power paddle blades 24 to rotate, and then driving the slag cleaning scraper 22 to rotate around the axis of the elastic cable 1; when the slag cleaning scraper 22 rotates, it uses its arc-shaped structure to capture and push the floating garbage, making it move along the water flow direction. Multiple slag cleaning scrapers 22 are arranged linearly to form a continuous transmission chain, pushing the floating garbage step by step to the centralized trough downstream. When the garbage accumulates to a predetermined amount in the centralized trough, it is automatically or semi-automatically cleaned.

[0039] In the present invention, the kinetic energy of the water flow is efficiently converted into the rotational power of the slag cleaning scraper 22 through the power paddle blades 24, without external power supply, featuring energy conservation and environmental protection; at the same time, since the water flow is continuous for 24 hours, this system can also achieve 24-hour fully automatic slag cleaning, not only greatly reducing the manual slag cleaning workload, but also enhancing the safety of the trash rack, with wide applicability and practicality.

[0040] Embodiment 1 An automatic slag cleaning system for a water turbine unit trash rack, comprising: An elastic cable 1, the two ends of the elastic cable 1 are respectively fixedly installed on the concrete dams 61 at both ends of the water turbine unit trash rack 6 through bidirectional threaded adjusting rods; the elastic cable 1 is arranged in front of the water turbine unit trash rack 6.

[0041] A slag cleaner 2, multiple slag cleaners 2 are equidistantly arranged on the elastic cable 1; the slag cleaner 2 includes 1 buoyancy bucket 21, 3 slag cleaning scrapers 22, 1 buoyancy rod 23 and 3 power paddle blades 24; both the buoyancy bucket 21 and the buoyancy rod 23 are cylindrical structures, and the cross-sectional area of the buoyancy bucket 21 is larger than that of the buoyancy rod 23; the buoyancy rod 23 is connected to the buoyancy bucket 21, and the axes of the buoyancy rod 23 and the buoyancy bucket 21 are on the same straight line; 3 slag cleaning scrapers 22 are equidistantly arranged on the outer side wall of the buoyancy bucket 21; 3 power paddle blades 24 are equidistantly arranged on the buoyancy rod 23; both the slag cleaning scraper 22 and the power paddle blade 24 are arc-shaped structures.

[0042] A universal joint, the elastic cable 1 and the buoyancy bucket 21 are connected through the universal joint.

[0043] A centralized collection module 4, the centralized collection module 4 is arranged downstream of the water turbine unit trash rack 6, and the centralized collection module 4 includes a guide plate and a centralized trough; the guide plate is connected to the centralized trough; an interception net and a vision sensor are arranged in the centralized trough; the guide plate is electrically connected to the control module; a flow velocity sensor is arranged in the water flow; the flow velocity sensor is electrically connected to the control module.

[0044] Wherein, a limiting rod is arranged between the elastic cable 1 and the water turbine unit trash rack 6; a water surface floating slag baffle 5 is arranged between the slag cleaner 2 and the water turbine unit trash rack 6.

[0045] Embodiment 2 The difference between this embodiment and Embodiment 1 is that this embodiment further includes an elastic cable 1, denoted as the second elastic cable. The two ends of the second elastic cable are respectively fixedly installed on the concrete dam 61 at both ends of the trash rack of the water turbine unit 6 through a bidirectional threaded adjusting rod. The second elastic cable is arranged in front of the trash rack of the water turbine unit 6, and the second elastic cable is connected to the buoyancy rod 23 of the slag cleaner 2 through a universal joint. The second elastic cable provides additional support for the slag cleaner 2, enhances the overall stability of the system, and can better withstand the impact of water flow and the movement of the slag cleaner 2.

[0046] Embodiment 3 The difference between this embodiment and Embodiment 1 is that this embodiment uses a fixed track to replace the elastic cable 1, which is applicable to water areas with relatively fast water flow or unstable water flow, avoiding excessive stretching or deformation of the elastic cable 1 due to too fast water flow speed.

[0047] Embodiment 4 The difference between this embodiment and Embodiment 1 is that in this embodiment, the closer to the center position of the elastic cable 1, the denser the distribution of the slag cleaners 2, that is, the smaller the distance between adjacent slag cleaners 2. This embodiment can better adapt to the characteristic that there is more garbage in the central area of the water flow. By increasing the density of the slag cleaners 2 in the central area, the capture and cleaning efficiency of floating garbage can be improved, thereby further enhancing the overall slag cleaning effect of the system.

[0048] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic slag removal system for sewage discharge of a water turbine unit, characterized in that: include: An elastic cable (1), wherein both ends of the elastic cable (1) are respectively fixedly mounted on concrete dams (61) at both ends of a water turbine unit trash can (6); the elastic cable (1) is arranged in front of the water turbine unit trash can (6); A slag cleaner (2), wherein a plurality of slag cleaners (2) are arranged at intervals on the elastic cable (1); the slag cleaner (2) comprises a buoyancy barrel (21), a slag cleaning scraper (22), a buoyancy rod (23) and a power blade (24); the buoyancy rod (23) is connected to the buoyancy barrel (21); the slag cleaning scraper (22) is arranged on the buoyancy barrel (21); the power blade (24) is arranged on the buoyancy rod (23); the slag cleaning scraper (22) and the power blade (24) are both arc-shaped structures; A flexible connection mechanism (3), wherein the elastic cable (1) and the buoyancy barrel (21) are connected via the flexible connection mechanism (3); A centralized collection module (4), wherein the centralized collection module (4) is arranged downstream of the water turbine unit sewage discharge (6).

2. The automatic slag removal system for sewage discharge of a water turbine unit according to claim 1 is characterized in that: A limit rod is provided between the elastic cable (1) and the water turbine unit trash drain (6).

3. The automatic slag removal system for sewage discharge of a water turbine unit according to claim 1 is characterized in that: A water surface scum baffle (5) is provided between the slag cleaner (2) and the turbine unit scum drain (6).

4. The automatic slag removal system for sewage discharge of a water turbine unit according to claim 1 is characterized in that: Both ends of the elastic cable (1) are connected to concrete dams (61) at both ends of the turbine unit sewage discharge (6) through adjustable anchoring devices.

5. The automatic slag removal system for sewage discharge of a water turbine unit according to claim 4 is characterized in that: The adjustable anchoring device is a bidirectional threaded adjustment rod.

6. The automatic slag removal system for sewage discharge of a water turbine unit according to claim 1 is characterized in that: The flexible connection mechanism (3) is a universal joint.

7. The automatic slag removal system for sewage discharge of a water turbine unit according to claim 1 is characterized in that: The centralized collection module (4) comprises a guide plate and a centralized trough; the guide plate and the centralized trough are connected; and an interception net is arranged in the centralized trough.

8. The automatic slag removal system for sewage discharge of a water turbine unit according to claim 7, characterized in that: A visual sensor is arranged in the concentration tank.

9. The automatic slag removal system for sewage discharge of a water turbine unit according to claim 7, characterized in that: The guide plate is electrically connected to the control module; a flow rate sensor is arranged in the water flow; and the flow rate sensor is electrically connected to the control module.

10. A method for automatically removing slag from sewage discharge of a water turbine unit, characterized in that: The automatic slag removal system for sewage discharge of a water turbine unit as claimed in any one of claims 1 to 9 comprises the following steps: The water flows through the power blades (24) to generate thrust, driving the power blades (24) to rotate, thereby driving the slag cleaning scraper (22) to rotate around the axis of the elastic cable (1); when the slag cleaning scraper (22) rotates, it pushes the floating garbage to move along the direction of the water flow until the floating garbage is pushed to the downstream concentration tank, and the garbage is cleaned after it accumulates to a predetermined amount.

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