A combined cleaning and desilting system for the intake of a hydropower station

Abstract

This utility model discloses a combined cleaning system for the intake of a hydropower station, relating to the technical field of hydropower station cleaning equipment. The system includes a rotary cleaning machine, a rake-type cleaning machine, and a belt conveyor. The rotary cleaning machine is positioned in the surface area of ​​the trash rack, 0.5-3 meters below the water surface, and achieves continuous cleaning of multiple openings through a rake array and a rotary drive device. The rake-type cleaning machine is located on top of the gate pier, and its cleaning rakes can be vertically raised and lowered to cover deeper areas, controlled by a lifting drive component and a cleaning gate mechanism. The belt conveyor receives the debris cleaned by both machines and transports it to the shore. The two cleaning machines work collaboratively; under normal conditions, the rotary machine operates independently, while during deep cleaning, the rotary rake array avoids obstacles, and the rake-type machine performs deep cleaning. This system achieves layered cleaning, improving efficiency and reducing costs, and is suitable for intake scenarios with multiple openings and deep trash racks.

Description

Technical Field

[0001] This utility model relates to the field of hydropower station cleaning technology, specifically to a combined cleaning system for the water inlet of a hydropower station. Background Technology

[0002] Currently, the cleaning of the intake is crucial in the operation of hydropower stations, directly affecting the power generation efficiency and equipment safety. Traditional cleaning methods have significant shortcomings: single cleaning equipment is difficult to adapt to the cleaning needs of different depths of contaminants at the intake; for example, rotary cleaning machines mainly focus on surface contaminants and have limited ability to clean deep contaminants; toothed rake cleaning machines, if used independently for full-depth operation, are inefficient and easily affected by surface contaminants.

[0003] Meanwhile, the poor coordination between cleaning and decontamination under different operating conditions, and the lack of smooth equipment coordination when switching between normal and deep cleaning modes, lead to incomplete cleaning, prolonged cleaning time, and increased operation and maintenance costs for hydropower stations. Furthermore, the lack of efficient coordination in the waste transport process makes it difficult to transfer cleaned waste ashore in a timely and orderly manner, easily causing secondary accumulation and affecting normal flow at the intake and the continuous operation of cleaning. Therefore, there is an urgent need for a combined cleaning system that can adapt to multiple depths of cleaning, has good coordination under different operating conditions, and provides efficient transport to ensure the stable operation of hydropower stations. Utility Model Content

[0004] The purpose of this utility model is to provide a combined cleaning system for the intake of a hydropower station, which solves the problems that a single cleaning device cannot adapt to the cleaning needs of different depths of dirt at the intake, has poor coordination in switching between working conditions, and has poor connection in the transport of dirt, resulting in incomplete cleaning, low efficiency, and affecting the stable operation of the hydropower station.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A combined cleaning system for the intake of a hydropower station includes a rotary cleaning machine, a toothed rake cleaning machine, and a belt conveyor; the rotary cleaning machine is arranged in the surface area below the water surface of the trash rack and is used to clean surface debris; the toothed rake cleaning machine is arranged in the full depth area of ​​the trash rack and is used to clean deep debris; the belt conveyor is used to transport the debris cleaned by the rotary cleaning machine and the toothed rake cleaning machine to the shore.

[0006] As a preferred solution for the combined cleaning system at the intake of a hydropower station, the rotary cleaning machine is arranged in the layer of concentrated dirt 0.5-3 meters below the water surface, and the rotary cleaning machine horizontally covers multiple intake openings. The rotary cleaning machine includes a toothed rake array and a rotary drive device. The toothed rake array is distributed laterally along the grid body, and the rotary drive device is connected to the toothed rake array. The rotary drive device rotates cyclically to continuously grab and transport surface dirt.

[0007] As a preferred solution for a combined cleaning system at the intake of a hydropower station, the number of toothed rake arrays is adapted to the number of intake orifices to be covered; and the height of the rotary cleaning machine's grid is adapted to the depth of the surface area.

[0008] As a preferred solution for the combined trash rack cleaning system at the intake of a hydropower station, the toothed rake-type trash rack cleaner is independently installed on the top of the gate pier. The cleaning rakes of the toothed rake-type trash rack cleaner vertically lift and cover the deep area from below the rotary trash rack cleaner to the bottom of the screen. The length of the cleaning rakes of the toothed rake-type trash rack cleaner is adapted to the full depth of the trash rack.

[0009] As a preferred embodiment of the combined cleaning system at the intake of a hydropower station, the belt conveyor is arranged behind the rotary cleaning machine and below the toothed rake cleaning machine to receive and transport the debris cleaned up by the rotary cleaning machine and the toothed rake cleaning machine.

[0010] As a preferred solution for the combined cleaning system at the intake of a hydropower station, the rotary cleaning machine and the toothed rake cleaning machine work together: under normal operating conditions, the rotary cleaning machine operates independently, while the toothed rake cleaning machine is on standby; under deep cleaning conditions, the toothed rake array of the rotary cleaning machine rotates to a safe position behind the screen, and the cleaning teeth of the toothed rake cleaning machine perform the cleaning operation.

[0011] As a preferred embodiment of the combined cleaning system at the intake of a hydropower station, the toothed rake cleaning machine also includes a lifting drive assembly, which is connected to the cleaning rake and is used to drive the cleaning rake to move vertically up and down.

[0012] The toothed rake-type cleaning machine also includes a cleaning gate mechanism, which is located on the top of the toothed rake-type cleaning machine and is used to control the raising and lowering of the cleaning rake and the cleaning action.

[0013] As a preferred option for the combined cleaning system at the intake of a hydropower station, the rotary cleaning machine also includes a rotary cleaning rake, which is located below the rotary cleaning machine to assist in cleaning debris.

[0014] As a preferred embodiment of the combined trash rack system at the intake of a hydropower station, the trash rack includes bottom sections of rack blades, which are disposed at the bottom of the trash rack.

[0015] The beneficial effects of this utility model are as follows: First, by focusing on the concentrated area of ​​surface dirt by the rotary cleaning machine, and utilizing its multi-hole continuous cleaning characteristics, the surface dirt can be cleaned efficiently and continuously, avoiding the efficiency limitations of traditional toothed rake cleaning machines that operate hole by hole; deep dirt is treated as needed by the toothed rake cleaning machine, and the two work together to reduce the cleaning gap and improve the overall cleaning efficiency of the water inlet.

[0016] Secondly, the rotary cleaning machine only covers the key surface area and does not require a full-depth rake chain, reducing material consumption and manufacturing difficulty. The rake cleaning machine only starts when there is dirt in the deep layer, reducing ineffective operations, reducing energy consumption and maintenance costs, and solving the problem of high cost and high energy consumption caused by the "full-depth coverage" of traditional single equipment.

[0017] Third, for scenarios with a large number of orifices and a deep trash rack, the rotary trash rack covers multiple orifices laterally, while the toothed trash rack covers the entire depth. Combined with the trash rack gate and guide rails, the structure ensures that the toothed trash rack can be raised and lowered stably and accurately, adapting to the characteristics of trash distribution at different depths and improving the system's adaptability to complex working conditions.

[0018] Fourth, the belt conveyor connects two cleaning machines to promptly transport the cleaned debris to the shore, preventing secondary accumulation of debris, ensuring smooth flow at the water inlet, reducing the risk of equipment failure due to debris blockage, and improving the operational stability of the hydropower station. Attached Figure Description

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0021] Figure 1 is a first-view three-dimensional structural diagram of the combined cleaning and decontamination system for the water inlet of a hydropower station proposed in this utility model.

[0022] Figure 2 is a two-dimensional structural diagram of the combined cleaning and decontamination system for the water inlet of a hydropower station proposed in this utility model.

[0023] Figure 3 is a three-dimensional structural diagram of the combined cleaning and decontamination system for the water inlet of a hydropower station proposed in this utility model from a third-view perspective.

[0024] Figure 4 is a cross-sectional structural diagram of the combined cleaning and decontamination system for the water inlet of a hydropower station proposed in this utility model.

[0025] In the diagram, 1. Rotary cleaning machine; 2. Rake-type cleaning machine; 3. Belt conveyor; 11. Rake array; 12. Rotary drive unit; 13. Rotary cleaning rake; 21. Cleaning rake; 22. Lifting drive assembly; 23. Cleaning gate motor; 4. Bottom section grid blades. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0028] Referring to Figures 1, 2, 3, and 4, this embodiment of the utility model provides a combined cleaning system for the intake of a hydropower station, including a rotary cleaning machine 1, a toothed rake cleaning machine 2, and a belt conveyor 3. The rotary cleaning machine 1 is arranged in the surface area below the water surface of the trash rack and is used to clean surface debris. The toothed rake cleaning machine 2 is arranged in the full depth area of ​​the trash rack and is used to clean deep debris. The belt conveyor 3 is used to transport the debris cleaned by the rotary cleaning machine 1 and the toothed rake cleaning machine 2 to the shore.

[0029] Specifically, by arranging the rotary cleaning machine 1 and the toothed rake cleaning machine 2 in layers according to the characteristics of dirt distribution, the rotary cleaning machine 1 focuses on treating the surface area where dirt is concentrated, while the toothed rake cleaning machine 2 is responsible for the entire depth, especially the deep areas, forming a collaborative mode of "continuous surface cleaning + on-demand deep cleaning". The belt conveyor 3 uniformly receives the dirt cleaned by both, solving the problem that it is difficult for a single device to balance efficiency and cost, and achieving efficient connection of the cleaning process.

[0030] In this embodiment, the rotary cleaning machine 1 is arranged in a layer of concentrated dirt 0.5-3 meters below the water surface. The rotary cleaning machine 1 covers multiple water inlet openings laterally. The rotary cleaning machine 1 includes a toothed rake array 11 and a rotary drive device 12. The toothed rake array 11 is distributed laterally along the grid. The rotary drive device 12 is connected to the toothed rake array 11 and rotates cyclically to continuously grab and transport surface dirt.

[0031] Specifically, the 0.5-3 meter range is the area where surface dirt is concentrated. The rotary cleaning machine 1 can target and treat most of the dirt in this range. The horizontally covered multi-orifice design, combined with the toothed rake array 11 and the cyclic drive of the rotary drive device 12, enables the toothed rake array 11 to continuously grab and transport surface dirt from multiple orifices, avoiding the interruption of traditional hole-by-hole operation and greatly improving the surface cleaning efficiency.

[0032] In this embodiment, the number of toothed rake arrays 11 is adapted to the number of water inlet orifices to be covered; the height of the rotary cleaning machine 1 is adapted to the depth of the surface area.

[0033] Specifically, the number of rake array 11 is adapted to the number of orifices, ensuring that the surface dirt of each orifice can be covered and cleaned by the corresponding rake, avoiding omissions; the height of the grid body is adapted to the surface depth, which can ensure coverage of the concentrated dirt layer without increasing the ineffective work area and equipment cost due to excessive height, thus achieving a balance between accurate coverage and cost control.

[0034] In this embodiment, the toothed rake-type cleaning machine 2 is independently installed on the top of the gate pier. The cleaning rake 21 of the toothed rake-type cleaning machine 2 vertically lifts and lowers to cover the deep area from below the rotary cleaning machine 1 to the bottom of the screen. The length of the cleaning rake 21 of the toothed rake-type cleaning machine 2 is adapted to the full depth of the screen.

[0035] Specifically, the independent installation on the top of the gate pier facilitates the flexible scheduling of the toothed rake-type cleaning machine 2, without being disturbed by the regular operation of the rotary cleaning machine 1; the vertical lifting design of the cleaning rake 21 allows it to penetrate deep areas, and its length is adapted to the full depth of the trash rack, ensuring that deep dirt from below the rotary cleaning machine 1 to the bottom of the rack can be reached and cleaned, filling the gaps in deep cleaning.

[0036] In this embodiment, the belt conveyor 3 is arranged behind the rotary cleaning machine 1 and below the toothed rake cleaning machine 2 to receive and transport the debris cleaned up by the rotary cleaning machine 1 and the toothed rake cleaning machine 2.

[0037] Specifically, this arrangement can simultaneously receive debris from two cleaning machines, preventing debris from accumulating near the equipment; through the continuous transmission characteristics of the belt conveyor, the debris is quickly transferred to the shore, ensuring that the cleaning process is not interrupted by debris accumulation and maintaining smooth flow at the inlet.

[0038] In this embodiment, the rotary cleaning machine 1 and the toothed rake cleaning machine 2 work together: under normal operating conditions, the rotary cleaning machine 1 operates independently, while the toothed rake cleaning machine 2 is on standby; under deep cleaning conditions, the toothed rake array 11 of the rotary cleaning machine 1 rotates to a safe position behind the grid, and the cleaning rakes 21 of the toothed rake cleaning machine 2 perform the cleaning operation.

[0039] Specifically, under normal conditions, the rotary cleaning machine 1 handles the main dirt alone, reducing the energy consumption of the equipment under no-load conditions; during deep cleaning, the toothed rake array 11 of the rotary cleaning machine 1 rotates to a safe position, freeing up working space for the toothed rake cleaning machine 2, avoiding interference between the two, ensuring smooth deep cleaning, realizing orderly coordination of working condition switching, and improving the overall smoothness of system operation.

[0040] In this embodiment, the toothed rake cleaning machine 2 further includes a lifting drive assembly 22, which is connected to the cleaning rake 21 and is used to drive the cleaning rake 21 to rise and fall vertically; the toothed rake cleaning machine 2 also includes a cleaning gate mechanism 23, which is disposed on the top of the toothed rake cleaning machine 2 and is used to control the rising and falling and cleaning actions of the cleaning rake 21.

[0041] Specifically, the lifting drive assembly 22 provides power to the cleaning rake 21, enabling it to achieve stable vertical lifting and ensuring that it can accurately reach the specified depth during deep cleaning; the cleaning gate 23, as the control center, coordinates and controls the lifting, starting and stopping, and grabbing actions of the cleaning rake 21, ensuring precise and controllable operation and improving the reliability of deep cleaning.

[0042] In one possible embodiment, the rotary cleaning machine 1 further includes a rotary cleaning rake 13, which is disposed below the rotary cleaning machine 1 to assist in cleaning dirt.

[0043] Specifically, the added rotary cleaning rake 13 works below the rotary cleaning machine 1 to assist in cleaning. It can handle dirt that may be missed by the main rake array 11 in the surface area, or perform secondary cleaning for more stubborn surface dirt, thereby enhancing the thoroughness of surface cleaning.

[0044] In one possible embodiment, the trash rack includes bottom section blades 4 disposed at the bottom of the trash rack.

[0045] Specifically, the bottom section of the grid blade 4 plays a preliminary interception role at the bottom of the trash rack, which can block larger or settled trash, reduce the direct impact of deep trash on downstream equipment, and at the same time reduce the deep cleaning load of the toothed rake trash cleaner 2, thus extending the service life of the equipment.

[0046] The workflow of this utility model is as follows: First, system initialization: Start the main control switch of the combined cleaning system at the hydropower station intake to perform a power-on self-test on the rotary cleaning machine 1, the rake-type cleaning machine 2, and the belt conveyor 3, ensuring that all equipment connections are normal (e.g., smooth transmission between the rotary drive unit 12 and the rake array 11, and a secure connection between the lifting drive component 22 and the cleaning rake 21), that the guide rail of the cleaning rake 21 is free of jamming, and that the bottom section of the grid blades 4 is securely installed). Set the initial operating parameters of the rotary cleaning machine 1: confirm that its rake array 11 horizontally covers all target intake orifices, that the default speed of the rotary drive unit 12 is adapted to the surface dirt density, and that the belt conveyor 3 is started and adjusted to a conveying speed matching the cleaning machine's unloading rhythm. The rake-type cleaning machine 2 returns to its initial position at the top of the gate pier, and the cleaning rake 21 retracts to its highest position, entering standby mode.

[0047] Second, the routine cleaning phase: The rotary cleaning machine 1 starts independently: Driven by the rotary drive device 12, the toothed rake array 11 rotates laterally along the grid, penetrating into the surface dirt concentration layer 0.5-3 meters below the water surface, and continuously grabbing floating or suspended surface dirt (such as branches, weeds, plastic waste, etc.). Surface waste transport: The waste grabbed by the toothed rake array 11 is lifted to the top of the grid as it rotates, and is discharged to the belt conveyor 3 behind it through the waste discharge structure (such as the inclined guide plate). The belt conveyor 3 transports the waste horizontally to the designated accumulation point on the shore. Enhanced auxiliary cleaning: The rotary cleaning rake 13 operates synchronously, assisting in cleaning up small surface dirt missed in the gaps between the rake array 11, thereby improving the surface cleaning coverage. Real-time monitoring: The system monitors the density of surface dirt through sensors. If the deep cleaning trigger threshold is not reached (e.g., the thickness of deep dirt accumulation does not exceed the set value), it continues to maintain normal cleaning.

[0048] Third, deep cleaning switching trigger: When the monitoring device (such as an underwater camera or pressure sensor) detects that there is dirt accumulation in the deep area of ​​the trash rack (from below the rotary trash cleaner 1 to the bottom of the rack) and the preset cleaning threshold is reached, the central control system issues a deep cleaning command. After receiving the instruction, the rotary cleaning machine 1 gradually reduces the speed of the rake array 11 and finally stops at the preset safe position - the entire rake array 11 rotates to the rear of the grid (away from the side of the water inlet opening) to ensure that there is no spatial overlap between it and the working area of ​​the rake cleaning machine 2.

[0049] Fourth, deep cleaning execution stage: toothed rake cleaning machine 2 starts: the cleaning gate machine 23 receives the working signal and controls the lifting drive component 22 to operate, driving the cleaning rake 21 to descend vertically along the guide rail; Deep dirt grabbing: The cleaning rake 21 descends to the deep dirt accumulation area, opens its teeth through the mechanical linkage structure, and closes to grab the dirt after embedding it, ensuring that the deep bottom dirt (such as stones and debris wrapped in thick silt) is firmly clamped. Deep sludge lifting and unloading: The lifting drive assembly 22 rotates in reverse to vertically lift the sludge-grabbing rake 21 to the top of the screen. The sludge gate motor 23 controls the rake to flip and unload the deep sludge onto the belt conveyor 3 below, which then transports it to the shore. Hole-by-hole cleaning cycle: After completing the deep cleaning of a single inlet hole, the cleaning gate 23 drives the toothed rake cleaning machine 2 to move laterally to the next hole, repeating the process of descending, grabbing, lifting, and unloading dirt until all the deep dirt in all holes is cleaned.

[0050] Fifth, system reset: After the deep cleaning is completed, the cleaning rake 21 of the toothed rake cleaning machine 2 is reset to the initial position at the top of the gate pier under the drive of the lifting drive component 22, and the lifting drive component 22 stops operating. The toothed rake array 11 of the rotary cleaning machine 1 rotates and resets from the safe position behind the grid, re-covering the multiple water inlet orifices. The rotary drive device 12 resumes normal speed and continues to perform surface cleaning.

[0051] Sixth, system shutdown: When the debris at the hydropower station intake is cleaned up (or the preset shutdown time is reached), the main control system sequentially shuts down the power switches of belt conveyor 3, rotary cleaning machine 1, and toothed rake cleaning machine 2 to complete the entire cleaning process.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A combined trash removal system for the intake of a hydroelectric power station, characterized in that, It includes a rotary trash rack cleaner (1), a toothed rake trash rack cleaner (2), and a belt conveyor (3); the rotary trash rack cleaner (1) is arranged in the surface area below the water surface of the trash rack and is used to clean surface trash; the toothed rake trash rack cleaner (2) is arranged in the full depth area of ​​the trash rack and is used to clean deep trash; the belt conveyor (3) is used to transport the trash cleaned by the rotary trash rack cleaner (1) and the toothed rake trash rack cleaner (2) to the shore.

2. The combined trash removal system for the intake of a hydropower station according to claim 1, characterized in that, The rotary cleaning machine (1) is arranged in a layer of concentrated dirt 0.5-3 meters below the water surface. The rotary cleaning machine (1) covers multiple water inlet openings laterally. The rotary cleaning machine (1) includes a toothed rake array (11) and a rotary drive device (12). The toothed rake array (11) is distributed laterally along the grid. The rotary drive device (12) is connected to the toothed rake array (11) and rotates cyclically to continuously grab and transport surface dirt.

3. The combined trash removal system for the intake of a hydropower station according to claim 2, characterized in that, The number of the toothed rake array (11) is adapted to the number of water inlet orifices to be covered; the height of the rotary cleaning machine (1) is adapted to the depth of the surface area.

4. The combined trash removal system for the intake of a hydropower station according to claim 1, characterized in that, The toothed rake-type cleaning machine (2) is independently installed on the top of the gate pier. The cleaning rake (21) of the toothed rake-type cleaning machine (2) is vertically lifted and lowered to cover the deep area from below the rotary cleaning machine (1) to the bottom of the grid. The length of the cleaning rake (21) of the toothed rake-type cleaning machine (2) is adapted to the full depth of the trash rack.

5. The combined trash removal system for the intake of a hydropower station according to claim 1, characterized in that, The belt conveyor (3) is arranged behind the rotary cleaning machine (1) and below the toothed rake cleaning machine (2) to receive and transport the debris cleaned up by the rotary cleaning machine (1) and the toothed rake cleaning machine (2).

6. The combined trash removal system for the intake of a hydroelectric power station according to claim 1, characterized in that, The rotary cleaning machine (1) and the toothed rake cleaning machine (2) work together: Under normal operating conditions, the rotary cleaning machine (1) operates independently and the toothed rake cleaning machine (2) is on standby; under deep cleaning conditions, the toothed rake array (11) of the rotary cleaning machine (1) rotates to a safe position behind the grid, and the cleaning rake (21) of the toothed rake cleaning machine (2) performs cleaning operations.

7. The combined trash removal system for the intake of a hydroelectric power station according to claim 4, characterized in that, The toothed rake cleaning machine (2) also includes a lifting drive assembly (22), which is connected to the cleaning rake (21) and is used to drive the cleaning rake (21) to rise and fall vertically; the toothed rake cleaning machine (2) also includes a cleaning gate machine (23), which is located on the top of the toothed rake cleaning machine (2) and is used to control the rising and falling and cleaning actions of the cleaning rake (21).

8. The combined trash removal system for the intake of a hydroelectric power station according to claim 1, characterized in that, The rotary cleaning machine (1) also includes a rotary cleaning rake (13), which is located below the rotary cleaning machine (1) and is used to assist in cleaning dirt.

9. The combined trash removal system for the intake of a hydroelectric power station according to claim 1, characterized in that, The trash rack includes bottom section rack blades (4), which are disposed at the bottom of the trash rack.

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