A pumped storage power station reservoir cleaning device and operation and maintenance method thereof

Abstract

The application relates to a pumped storage power station reservoir cleaning device and a running and maintaining method thereof. The device comprises a dam body, a filtering assembly arranged in the lower reservoir body and communicated with the water inlet end of a pumping unit, a plurality of groups of V-shaped baffles are arranged on the mounting base of the filtering assembly and are staggered with each other, an S-shaped flow channel is formed, quartz sand and other abrasive particles in the water flow lose kinetic energy, slide along the inner wall of the baffle to a storage chamber and are discharged by a shaftless spiral conveying blade, a reciprocating shearing blade linked with a driving shaft is further arranged in the frame to cut water grass, a cleaning assembly is arranged at the water inlet end of the generator unit, a motor driven by wind power drives a scraping plate on a conveying belt to automatically scrape off sundries at the water inlet end and send the sundries into a dam top material collecting box. The application integrates fine sand separation, water grass cutting and automatic sundry cleaning functions, avoids the entry of abrasive particles and sundries into the unit, reduces the equipment wear and tear and the risk of blockage, and guarantees the long-term stable operation of the power station.

Description

Technical Field

[0001] This invention belongs to the technical field of pumped storage units, and relates to a pumped storage power station reservoir cleaning device and its operation and maintenance method, particularly to a multi-functional cleaning device for the inlet and outlet of a pumped storage power station reservoir and its operation and maintenance method. Background Technology

[0002] As an important peak-shaving, valley-filling, and energy storage facility in the power system, the operational stability of pumped storage power stations is directly related to the safe and reliable operation of the power system. Pumped storage power stations typically divide the river channel into an upper reservoir and a lower reservoir through the dam body. They use turbine generator units and pumping units to realize the mutual conversion of electrical energy and water energy. The lower reservoir serves as the water intake area, and the cleanliness of its inlet directly affects the operational safety of the turbine generator units and pumping units.

[0003] Currently, the cleaning of the reservoir inlet of pumped storage power stations mainly relies on traditional trash racks to intercept floating debris and separate sedimentation tanks to separate silt. Some power stations use floating trash racks to assist in intercepting floating debris. However, these existing technologies all have significant defects and shortcomings, making it difficult to meet the requirements for long-term stable operation of the power station. Traditional trash racks can only intercept large floating debris and cannot effectively handle fine particles such as quartz sand in the water flow. These fine particles enter the turbine generator unit and pumping unit body with the water flow, causing severe wear on core components such as the runner blades, reducing equipment lifespan, increasing maintenance costs, and even causing equipment failure, affecting the normal operation of the unit.

[0004] Existing debris interception devices typically use filter screens to intercept sediment. If the filter screen aperture is too small, sediment will quickly clog the screen, resulting in poor water flow and reduced water pressure, which will not meet the normal water intake requirements of the unit. If the aperture is too large, it will not be able to effectively intercept fine sediment particles and aquatic plants. Summary of the Invention

[0005] In view of this, in order to solve the problems of the above-mentioned existing pumped storage power station cleaning technology, such as the failure of fine particle abrasive interception leading to equipment wear, the mutual restriction between filtration accuracy and flow capacity easily causing blockage, and the lack of an integrated collaborative cleaning mechanism, which affects the overall operating efficiency of the power station, the present invention provides a pumped storage power station reservoir cleaning device and cleaning method.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A pumped-storage power station reservoir cleaning device, wherein the dam body divides the reservoir into an upper reservoir body and a lower reservoir body, and a turbine generator set and a pumping unit body are installed in the dam body body. The water inlet I of the turbine generator set is located in the upper reservoir body body, and the water outlet I is located in the lower reservoir body body. The water inlet II of the pumping unit body is located in the lower reservoir body body, and the water outlet II is located in the upper reservoir body body. The device includes: a filter assembly, which is installed in the lower reservoir body body and communicates with the water inlet II. The filter assembly includes a frame and a mounting base fixed in the frame. Multiple sets of baffles are fixed on the top of the mounting base, and the multiple sets of baffles are staggered to form an S-shaped flow channel, so that the particulate matter in the water flow is separated under the action of gravity and falls into the storage chamber at the bottom of the frame.

[0008] The cleaning component is located on one side of the dam body and corresponds to the position of the water intake end I. The cleaning component is driven by a motor in the support frame II located on the top of the dam body. It is used to clean the debris outside the water intake end I and transport the debris upward.

[0009] The collection box, located on top of the dam body, is used to collect debris transported by the cleaning components.

[0010] As a further improvement to the above technical solution:

[0011] The baffle plate of the filter assembly is V-shaped, and its concave side forms a still water vortex zone in the S-shaped flow channel, so that the quartz sand particles in the water flow lose kinetic energy and slide down the inner wall of the baffle plate, and enter the storage chamber through the discharge through hole on the mounting base plate.

[0012] As a further improvement to the above technical solution:

[0013] The storage chamber is equipped with a conveying assembly, which includes a drive shaft rotatably installed in a bushing. One end of the drive shaft is connected to an external motor, and the other end extends into the storage chamber and is fixedly connected to shaftless spiral conveying blades to convey the particles collected in the storage chamber to one side of the lower storage body.

[0014] As a further improvement to the above technical solution:

[0015] Two guide rails are fixedly installed inside the frame, and a sliding frame is slidably installed between the two guide rails. Multiple shearing blades that cooperate with the outer baffle are fixed inside the sliding frame. One side of the sliding frame is connected to the drive shaft so that when the drive shaft rotates, the shearing blades are driven to move back and forth relative to the baffle to cut the aquatic plants in the water flow.

[0016] As a further improvement to the above technical solution:

[0017] The sliding frame is connected to the drive shaft via a sliding bracket. One end of the sliding bracket is fixedly connected to the sliding frame, and the other end extends into the drive housing fixed to one side of the frame. Two rolling wheels are rotatably provided at the bottom of the sliding bracket. A deflection roller is fixedly sleeved on the outer wall of the drive shaft. The deflection roller is obliquely sleeved on the drive shaft, located between the two rolling wheels and abutting against the two rolling wheels, so as to push the sliding bracket to reciprocate along the guide rail when the drive shaft rotates.

[0018] As a further improvement to the above technical solution:

[0019] The cleaning assembly includes two support frames I fixed to one side of the dam body. Multiple rotating rollers are rotatably arranged between the two support frames I. Conveyor belts are sleeved on the outside of the multiple rotating rollers. Scraper plates are fixed on the outside of the conveyor belts. One end of the rotating roller at the top is connected to the output end of the motor inside the support frame II.

[0020] The top of the cleaning component is tilted towards the collection box so that the debris scraped off by the scraper from the outside of the water inlet I falls into the collection box under gravity as it travels to the top with the conveyor belt.

[0021] A baffle is fixedly installed on the inner side of the support frame I, and a scraper is located between the two baffles to prevent debris from sliding off the sides of the conveyor belt.

[0022] As a further improvement to the above technical solution:

[0023] The support frame II is also equipped with a wind turbine generator and a battery. The electrical energy generated by the wind turbine generator is stored in the battery, which provides power to the motor in the support frame II, and a grid power supply interface is reserved as a backup.

[0024] An operation and maintenance method based on the above-mentioned pumped storage power station reservoir cleaning device includes the following steps:

[0025] S1. When the power load is low, the pumping unit operates. The water in the lower tank flows through the filter components. In the S-shaped flow channel formed by multiple sets of staggered baffles, the quartz sand particles in the water lose kinetic energy and slide down into the storage chamber under the action of gravity, and are discharged by the conveying components.

[0026] S2. The shearing blades are driven to reciprocate by the drive shaft, which works with the baffle plate to cut the water plants in the water flow and drop them into the storage chamber. At the same time, the drive shaft drives the shaftless spiral conveyor blades in the storage chamber to rotate synchronously, slowly pushing the mud and small debris accumulated in the storage chamber to one side of the lower tank body. The staff only need to set up a collection device to clean them uniformly to avoid the accumulation of mud and sand and blockage of the storage chamber.

[0027] S3. During peak power load periods, the hydro-generator unit operates, and the motor of the cleaning component drives the conveyor belt to move, which in turn drives the scraper to scrape off the debris attached to the outside of the water inlet I and convey it upwards, so that the debris falls into the collection box for unified collection.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. The pumped storage power station reservoir cleaning device disclosed in this invention uses multiple sets of staggered baffles in the filter assembly to change the cross-sectional area of ​​the flow channel through a V-shaped structure, forcibly destroying the sand-carrying kinetic energy of the water flow. This causes fine particles such as quartz sand in the water flow to lose kinetic energy in the still water vortex zone on the concave side of the baffles. Under the action of gravity, they slide down along the inner wall of the baffles, enter the storage chamber through the discharge through-hole, and are then pushed out by the shaftless spiral conveyor blades. This fundamentally prevents fine sand from entering the pumping unit body, reduces wear on core components such as impeller blades, lowers equipment maintenance costs, avoids equipment failures caused by mud and sand wear, and ensures stable operation of the unit.

[0030] 2. The pumped storage power station reservoir cleaning device disclosed in this invention uses a sliding frame in the filter assembly to drive the shearing blades to cooperate with the baffle plate, which can cut flexible debris such as aquatic plants in the water flow into small pieces, making it easier to discharge them later, and effectively preventing aquatic plants from entangled and clogging the filter assembly and the water inlet II.

[0031] 3. The pumped storage power station reservoir cleaning device disclosed in this invention uses a scraper driven by a conveyor belt to thoroughly remove debris, algae, and other contaminants adhering to the outside of the inlet I. The scraped debris is then transported by the conveyor belt to a collection box for centralized collection. This eliminates the need for frequent manual cleaning in the water, reducing labor intensity and improving debris removal efficiency. The baffle plate prevents debris from slipping off the sides of the conveyor belt, ensuring thorough collection and further preventing blockage at the inlet I, thus guaranteeing normal water intake for the unit.

[0032] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0034] Figure 1 This is a side view of the pumped storage power station reservoir cleaning device of the present invention;

[0035] Figure 2This is a three-dimensional structural schematic diagram of the pumped storage power station reservoir cleaning device of the present invention;

[0036] Figure 3 This is a three-dimensional structural schematic diagram of the pumped storage power station reservoir cleaning device of the present invention from another perspective;

[0037] Figure 4 This is a schematic diagram of the main structure of the hydro-generator unit and the pumping unit in this invention;

[0038] Figure 5 This is a cross-sectional view of the filtering component in this invention;

[0039] Figure 6 This is a schematic diagram of the baffle plate installation structure in this invention;

[0040] Figure 7 This is a schematic diagram of the sliding frame mounting structure in this invention;

[0041] Figure 8 This is a schematic diagram of the baffle structure in this invention;

[0042] Figure 9 This is a schematic diagram of the connection structure between the drive shaft, the shaftless spiral conveying blade, and the sliding frame in this invention.

[0043] Figure 10 This is a schematic diagram of the cleaning component structure in this invention;

[0044] Figure 11 This is a schematic diagram of the cleaning component and water inlet I in this invention.

[0045] Reference numerals: 1. Dam body; 2. Upper reservoir body; 3. Lower reservoir body; 4. Filter assembly; 41. Frame; 42. Mounting base plate; 43. Baffle plate; 44. Storage chamber; 45. Shaftless screw conveyor blade; 46. Discharge through hole; 47. Guide rail; 48. Sliding frame; 49. Shearing blade; 410. Drive housing; 411. Sliding bracket; 412. Rolling wheel; 5. Cleaning assembly; 51. Support frame I; 52. Baffle plate; 53. Rotating roller; 54. Conveyor belt; 55. Scraper; 6. Collection box; 7. Support frame II; 8. Wind turbine generator set; 9. Drive shaft; 91. Shaft sleeve; 92. Deflecting roller; 10. Hydro turbine generator set; 11. Drainage end I; 12. Inlet end I; 13. Pumping unit body; 14. Inlet end II; 15. Drainage end II. Detailed Implementation

[0046] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0047] like Figure 1 The pumped-storage power station reservoir cleaning device shown is applied at the river inlet of the pumped-storage power station to clean debris and separate fine-particle silt at the reservoir inlet, preventing debris and silt from entering the turbine generator unit and pumping unit, thus ensuring stable operation of the units. The device is installed on the river channel. The dam body 1 is constructed of reinforced concrete, with stainless steel reinforcements embedded internally during the pouring process to enhance the overall structural strength and prevent water leakage at the joints. The dam body 1 divides the river channel into the upper reservoir body 2 and the lower reservoir body 3. The upper reservoir body 2 serves as the water storage area, and the lower reservoir body 3 serves as the flood discharge area. The two are interconnected through channels inside the dam body 1. The inner walls of the channels are smoothed to reduce water flow resistance, and waterproof sealing sleeves are installed at the joints between the channels and the dam body 1 to prevent water seepage.

[0048] like Figure 4 As shown, the dam body 1 houses a turbine generator set 10 and a pumping unit body 13, arranged side-by-side with reasonable spacing to avoid mutual interference during operation. The drainage end I11 of the turbine generator set 10 extends into the lower reservoir body 3; the water inlet end I12 of the turbine generator set 10 extends into the upper reservoir body 2. A protective fence is installed at the water inlet end I12, which is made of stainless steel and welded together. This initial interception of large floating debris prevents large debris from entering the dam without affecting the water flow. The inlet end II14 of the pumping unit body 13 is located inside the lower reservoir body 3 and is symmetrically distributed with the inlet end I12 of the turbine generator set 10. The inlet end II14 is also equipped with a protective structure. The protective structure uses the same stainless steel protective grid as the inlet end I12 to prevent debris from directly entering the pumping unit body 13. The outlet end II15 of the pumping unit body 13 extends into the upper reservoir body 2. The outlet direction of outlet II15 is consistent with that of outlet I11 to ensure that the water flows smoothly into the upper reservoir body 2, forming a pumped storage power station. It uses the power energy during the off-peak period to pump water to the upper reservoir body 2 and releases water to the lower reservoir body 3 during the peak period.

[0049] like Figure 2 , 3 As shown, a filter assembly 4 is installed inside the lower reservoir body 3. The filter assembly 4 is connected to multiple water inlets II 14, ensuring that the water entering the pumping unit body 13 is first processed by the filter assembly 4, separating out fine particles of silt and some small impurities. Figure 5 As shown, the frame 41 of the filter assembly 4 is made of stainless steel. Stainless steel has good corrosion resistance and wear resistance, making it suitable for the underwater environment of the reservoir. The frame 41 has an overall frame structure and is embedded in the dam body 1 using expansion bolts made of stainless steel. Sealing gaskets are installed at the joints between the bolts and the dam body 1 to prevent water from seeping into the frame 41. The height and width of the frame 41 correspond to the multiple inlet ends II 14, ensuring that all water flows through the filter assembly 4. An installation base plate 42 is fixed inside the frame 41 by welding. The weld joints are treated with anti-corrosion to prevent rust. The installation base plate 42 is made of stainless steel with a smooth surface. Multiple sets of baffles 43 are fixed on the top. Sealing strips are installed at the connection between the installation base plate 42 and the frame 41 to prevent water from flowing through gaps and to avoid unfiltered sediment entering the inlet end II 14 directly.

[0050] The baffle plate 43 is made of wear-resistant alloy material, which effectively resists the erosion of fine particles of sediment, extending its service life. The baffle plate 43 has a V-shaped structure and is fixed to the top of the mounting base plate 42 with bolts made of stainless steel, with waterproof caps on the bolt heads to prevent corrosion. Adjacent sets of baffle plates 43 are staggered and tilted, forcing the water flow through them in an S-shape. The baffle plate 43 utilizes its V-shaped structure to change the cross-sectional area of ​​the flow channel, causing the water velocity to change continuously during flow, thereby forcibly disrupting the sediment-carrying kinetic energy of the water flow. The concave side of the V-shaped plate forms a physical still water vortex zone, where heavier abrasive particles such as quartz sand lose kinetic energy and slowly slide down the inner wall of the V-shaped plate under gravity. The inner wall of the baffle plate 43 is smoothed to reduce sediment adhesion and facilitate sediment sliding. Figure 8 As shown, the top of the mounting base plate 42 is provided with a discharge through hole 46 corresponding to the baffle plate 43. The edge of the discharge through hole 46 is chamfered to prevent mud and sand from accumulating at the opening. The mud and sand and small debris that slide down enter the storage chamber 44 at the bottom of the frame 41 through the discharge through hole 46.

[0051] like Figure 9As shown, the storage chamber 44 has a semi-circular cross-section and is welded from stainless steel. The weld joints are sealed. The storage chamber 44 is located at the bottom of the frame 41 and is sealed to the mounting base plate 42. An O-ring is provided at the connection to enhance the sealing performance. A conveying assembly is installed inside the storage chamber 44 to transport the collected impurities to one side of the lower storage body 3 for easy subsequent cleaning. The conveying assembly includes a drive housing 410, which is a sealed structure made of stainless steel and bolted to one side of the frame 41. The bolts are also made of stainless steel. The drive housing 410 has an internal waterproof sealing structure, which uses a double seal of rubber gasket and sealant to prevent water from entering and affecting the operation of the components. The dam body 1 is equipped with a bushing 91. The bushing 91 is made of seamless steel pipe with a smooth inner wall to reduce friction with the drive shaft 9. The drive shaft 9 is rotatably mounted inside the bushing 91. The drive shaft 9 is made of high-strength alloy material with an anti-corrosion coating to enhance corrosion resistance. One end extends to the outside of the dam body 1 and is fixedly connected to an external motor. The external motor is a waterproof motor with a sealed housing to prevent water from entering the motor. A bearing housing is fixed at one end of the storage chamber 44 near the drive housing 410. A waterproof bearing is embedded in the bearing housing. The other end of the drive shaft 9 extends through the waterproof bearing into the storage chamber 44 and is fixedly provided with a shaftless spiral conveying blade 45 by a key connection. A positioning pin is provided at the key connection to prevent the shaftless spiral conveying blade 45 from sliding relative to the drive shaft 9. The two-point support of the bushing tube 91 and the bearing housing avoids the drive shaft 9 from being subjected to cantilevered force, prevents it from bending and deforming, and ensures stable transmission. A wear-resistant sealing strip is provided between the shaftless spiral conveying blade 45 and the inner wall of the storage chamber 44 to prevent mud and sand from leaking out from the gap and ensure that all mud, sand and debris in the storage chamber 44 can be pushed out.

[0052] like Figure 6 As shown, two guide rails 47 are fixedly installed inside the frame 41. The two guide rails 47 are arranged parallel to each other vertically and are fixed inside the frame 41 by bolts made of stainless steel. The guide rails 47 are also made of stainless steel with a chrome-plated surface to enhance wear resistance and smoothness, and reduce sliding friction. Figure 7As shown, a sliding frame 48 is slidably provided between the two guide rails 47. The sliding frame 48 has a rectangular frame structure and is welded from stainless steel. The weld joints are treated with anti-corrosion. The sliding frame 48 slides with the guide rails 47. A sliding bearing is provided at the mating point to reduce sliding resistance. Multiple shearing blades 49 are fixed inside the sliding frame 48 by bolts. The shearing blades 49 are made of high-strength wear-resistant alloy material. The blades are hardened to enhance sharpness and wear resistance. The spacing is adapted to the spacing of the baffles 43. They are used to cooperate with the outer baffles 43 to cut flexible debris such as aquatic plants in the water flow. One side of the sliding frame 48 is connected to the drive shaft 9 to realize the reciprocating movement of the shearing blade 49. The specific transmission structure is as follows: A sliding bracket 411 is slidably provided through one side of the frame 41. The sliding bracket 411 is made of stainless steel. One end is fixedly connected to the sliding frame 48 by bolts made of stainless steel. The other end extends into the drive housing 410. A sealing sleeve is provided at the penetration point between the sliding bracket 411 and the frame 41. The sealing sleeve is made of rubber to prevent water from entering the drive housing 410. Two rolling wheels 412 are rotatably provided at the bottom of the sliding bracket 411 through bearings. The rolling wheels 412 are made of rubber with anti-slip texture on the surface. The bearings are waterproof bearings to prevent water from entering the bearing and affecting the rotation. A deflecting roller 92 is fixedly mounted on the outer wall of the drive shaft 9 via a key connection. The deflecting roller 92 is obliquely mounted on the drive shaft 9. During the rotation of the deflecting roller 92, it can drive the sliding bracket 411 to move laterally. The deflecting roller 92 is located between two rolling wheels 412. The outer wall of the deflecting roller 92 is in close contact with the outer walls of the two rolling wheels 412. The surface of the deflecting roller 92 is treated with anti-slip to enhance the friction with the rolling wheels 412. When the drive shaft 9 rotates, it drives the deflecting roller 92 to rotate synchronously. Through the squeezing force between the deflecting roller 92 and the rolling wheels 412, the sliding bracket 411 moves back and forth along the length of the guide rail 47, which in turn drives the sliding frame 48 and the shearing blade 49 to move back and forth. With the help of the outer baffle plate 43, it can effectively cut flexible debris such as aquatic plants into small pieces for easy subsequent discharge. The guide rail 47, the sliding frame 48, the shearing blade 49, and the bearings at each rotating connection are all made of wear-resistant alloy material and have a waterproof and sandproof sealing structure.

[0053] A cleaning component 5 is installed on one side of the dam body 1. The cleaning component 5 corresponds to the water inlet end I12 and is used to clean debris from the outside of the water inlet end I12, preventing debris from accumulating and clogging it. For example... Figure 10As shown, the cleaning component 5 includes two support frames I 51, both made of stainless steel, which are fixed to one side of the dam body 1 by expansion bolts. The expansion bolts are also made of stainless steel, and sealing gaskets are installed at the joints between the bolts and the dam body 1 to prevent water seepage. The two support frames I 51 are arranged in parallel, providing sufficient support strength. Multiple rotating rollers 53 are rotatably mounted between the two support frames I 51 via bearings. The bearings are waterproof to prevent water from entering. The rotating rollers 53 are made of stainless steel with an anti-corrosion treatment. Conveyor belts 54 are fitted around the outer sides of the multiple rotating rollers 53. The conveyor belts 54 are made of wear-resistant rubber with an internal fiber reinforcement layer to enhance toughness and wear resistance, and have anti-slip textures on the surface to prevent debris from slipping during transport. A scraper 55 is bolted to the outer side of the conveyor belt 54. The scraper 55 is made of wear-resistant plastic and has a certain degree of elasticity to avoid scratching the outer wall of the water inlet end I12. The spacing is adapted to the spacing of the baffle plate 43. The gap between the scraper 55 and the outer wall of the water inlet end I12 is reasonable, which can effectively scrape off the debris attached to the outer side of the water inlet end I12. One end of the rotating roller shaft 53 located at the top extends to the outside of the support frame I51 and is connected to the motor output end in the support frame II7 through a coupling. The coupling is made of stainless steel and is equipped with a sealing cover to prevent debris and water from entering the coupling. This enables the rotating roller shaft 53 to rotate, thereby driving the conveyor belt 54 and the scraper 55 to move. This effectively scrapes off debris without causing wear to the water inlet end I12.

[0054] like Figure 11 As shown, a baffle plate 52 is bolted to the inner side of the support frame Ⅰ51. The baffle plate 52 is made of stainless steel with a smooth surface to reduce the adhesion of debris. It is the same width as the conveyor belt 54. A scraper plate 55 is located between the two baffle plates 52. The baffle plates 52 prevent the scraped debris from sliding off the sides of the conveyor belt 54, ensuring that all debris is conveyed to the designated position. A collection box 6 is installed on the top of the dam body 1. The collection box 6 is made of stainless steel and has a cuboid structure. The surface of the box is treated with anti-corrosion. It is bolted to the top of the dam body 1. The bolts are made of stainless steel. A sealing gasket is installed at the connection with the dam body 1 to prevent debris from falling. The collection box 6 corresponds to the cleaning component 5, and the top of the cleaning component 5 is inclined toward the collection box 6, so that the debris on the conveyor belt 54 falls into the collection box 6 under the action of gravity. The bottom of the collection box 6 is equipped with an openable discharge door. The discharge door is made of stainless steel and a sealing strip is installed at the connection with the collection box 6 to enhance the sealing performance. The discharge door is fixed with bolts. The collected debris can be cleaned by opening the discharge door periodically. A rubber gasket is installed on the inside of the discharge door to prevent debris from getting stuck in the door gap.

[0055] like Figure 10As shown, a support frame II 7 is fixed to the top of the dam body 1. The support frame II 7 is welded from stainless steel and has a frame structure. The welded joints are treated with anti-corrosion coating. It is fixed to the top of the dam body 1 with stainless steel bolts. A sealing ring is installed at the connection point with the dam body 1 to prevent water seepage. The support frame II 7 corresponds to the cleaning component 5 and is used to install the wind turbine generator 8, motor, and battery. The wind turbine generator 8 is bolted to the top of the support frame II 7. The bolts are made of stainless steel, and shock-absorbing pads are installed at the connection points to reduce vibrations generated during operation. The outer casing of the wind turbine generator 8 has a sealed structure to prevent rainwater and dust from entering. The generated electricity is transmitted through wires to the battery inside the support frame II 7 for storage. The wires are waterproof cables to prevent leakage. The battery is a sealed waterproof battery placed in a waterproof sealed box made of stainless steel to prevent water ingress and to meet the power supply requirements of the motor inside the support frame II 7. The motor inside the support frame II7 is a waterproof motor with a sealed housing. It is connected to the battery via wires and powered by the battery to drive the cleaning component 5. It does not require additional grid connection, saving energy and is suitable for installation in remote reservoir areas.

[0056] The dam body 1 is also equipped with a controller, which is electrically connected to the external motor and the motor in the support frame II 7. The controller is used to control the start and stop and speed of each motor. When the pumping unit body 13 is running, the controller controls the external motor to start, so as to drive the conveying component and the shearing blade 49 to work. When the turbine generator unit 10 is running, the controller controls the motor in the support frame II 7 to start, so as to drive the cleaning component 5 to work. The controller can be an industrial-grade programmable logic controller or a microcontroller.

[0057] The detailed cleaning process of the pumped storage power station reservoir cleaning device is as follows:

[0058] When it is necessary to utilize electricity during off-peak hours to pump water to the upper reservoir body 2, the pumping unit body 13 is activated. Water flows from the lower reservoir body 3 into the filter assembly 4. As it flows through multiple sets of staggered baffles 43, it is guided by the baffles 43 to flow in an S-shape. The V-shaped structure of the baffles 43 continuously changes the cross-sectional area of ​​the flow channel, forcibly attenuating the kinetic energy of the sand-carrying water. Due to the reduction of kinetic energy, fine abrasive particles such as quartz sand in the water flow slide down the concave inner wall of the baffles 43 under the action of gravity. The slid-down sediment passes through the discharge channel on the mounting base plate 42. Through hole 46, the material smoothly enters the storage chamber 44, completing the initial collection of mud and sand. At this time, the external motor starts, driving the drive shaft 9 to rotate. The drive shaft 9 drives the shaftless spiral conveying blades 45 in the storage chamber 44 to rotate synchronously. The shaftless spiral conveying blades 45, through their own spiral structure, slowly push the mud, sand and small debris accumulated in the storage chamber 44 to one side of the lower storage body 3. The staff only needs to set up a collection device at this position to complete the unified cleaning of mud and sand, avoiding the accumulation of mud and sand that blocks the storage chamber 44.

[0059] While the drive shaft 9 rotates, the deflection roller 92 on its outer wall rotates synchronously. The deflection roller 92 is in close contact with the two rolling wheels 412 at the bottom of the sliding bracket 411. Through friction, the sliding bracket 411 moves back and forth along the guide rail 47. The sliding bracket 411 drives the sliding frame 48 and the shearing blade 49 to move back and forth together. The shearing blade 49 cooperates with the baffle plate 43 to cut the flexible debris such as water plants and plastic bags that flow through the filter component 4 into small pieces. Part of the cut pieces enter the storage chamber 44 through the discharge hole 46 with the water flow and are pushed out by the shaftless spiral conveying blade 45 along with the mud and sand. The other part flows to the water inlet II 14 and is intercepted by the protective grid of the water inlet II 14. The debris can be completely removed by manually cleaning the protective grid periodically.

[0060] During peak power load periods, when water is released into the lower reservoir body 3, the water flow drives the turbine generator set 10 to generate electricity. The battery in the support frame II 7 powers the motor. After the motor starts, it drives the rotating roller 53 at the top to rotate through the coupling. The rotating roller 53 drives the conveyor belt 54 to move. The conveyor belt 54 drives the scraper 55 on the outside to move synchronously. During the movement, the scraper 55 comes into close contact with the outer wall of the water inlet I 12, thoroughly scraping away debris, algae, and other debris attached to the outer wall of the water inlet I 12. The scraped debris adheres to the conveyor belt 54 and moves to the top with the conveyor belt 54. Because the top of the cleaning component 5 is inclined towards the collection box 6, the debris slides off the conveyor belt 54 under the action of gravity and enters the collection box 6 for centralized collection. When the debris in the collection box 6 accumulates to a certain amount, the staff can open the discharge door at the bottom of the collection box 6 to clean and remove the debris, completing the cleaning of debris at the water inlet I 12.

[0061] The entire cleaning process does not require manual operation in the water. It only requires periodic cleaning of the mud and sand pushed from the storage chamber 44, the debris intercepted by the protective fence, and the debris in the collection box 6. The wind turbine generator 8 continuously charges the battery to ensure the continuous and stable operation of the cleaning component 5. The mud and sand separation and aquatic weed cutting of the filter component 4 are carried out simultaneously with the pushing work of the conveying component, forming a complete cleaning closed loop. This achieves comprehensive and efficient cleaning of the water inlet of the pumped storage power station reservoir, ensuring the normal operation of the turbine generator 10 and the pumping unit 13.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A pumped-storage power station reservoir cleaning device, wherein the dam body divides the reservoir into an upper reservoir body and a lower reservoir body, and a turbine generator set and a pumping unit body are installed within the dam body body, wherein the water inlet I of the turbine generator set is located within the upper reservoir body, and the water outlet I of the turbine generator set is located within the lower reservoir body, and the water inlet II of the pumping unit body is located within the lower reservoir body, and the water outlet II of the pumping unit body is located within the upper reservoir body; characterized in that, include: The filter assembly is located in the lower tank body and connected to the water inlet II. The filter assembly includes a frame and a mounting base fixed in the frame. Multiple sets of baffles are fixed on the top of the mounting base. The multiple sets of baffles are staggered to form an S-shaped flow channel, so that the particles in the water flow are separated by gravity and fall into the storage chamber located at the bottom of the frame. The cleaning component is located on one side of the dam body and corresponds to the position of the water intake end I. The cleaning component is driven by a motor in the support frame II located on the top of the dam body. It is used to clean the debris outside the water intake end I and transport the debris upward. The collection box, located on top of the dam body, is used to collect debris transported by the cleaning components. The top of the mounting base has a discharge through-hole corresponding to the baffle plate. The baffle plate is V-shaped, and its concave side forms a still water vortex zone in the S-shaped flow channel, causing the quartz sand particles in the water flow to lose kinetic energy and slide down the inner wall of the baffle plate, entering the storage chamber through the discharge through-hole on the mounting base. Two guide rails are fixed inside the frame, and a sliding frame slides between the two guide rails. Multiple shearing blades that cooperate with the outer baffle plate are fixed inside the sliding frame. One side of the sliding frame is connected to a drive shaft, so that when the drive shaft rotates, the shearing blades reciprocate relative to the baffle plate to cut aquatic plants in the water flow. The frame is close to the drive shaft. A sliding bracket is slidably mounted on one side of the rotating shaft. The sliding bracket is connected to the driving shaft via the sliding bracket. Two rolling wheels are rotatably mounted at the bottom of the sliding bracket. A deflecting roller is fixedly mounted on the outer wall of the driving shaft. The deflecting roller is obliquely mounted on the driving shaft, located between the two rolling wheels and abutting against them, so as to push the sliding bracket to reciprocate along the guide rail when the driving shaft rotates. A bushing is embedded inside the lower silo body. A conveying assembly is provided in the storage chamber. The conveying assembly includes a driving shaft rotatably mounted in the bushing. An external motor is fixedly connected to one end of the driving shaft, and the other end extends into the storage chamber and is fixedly connected to a shaftless spiral conveying blade, so as to convey the particulate matter collected in the storage chamber to one side of the lower silo body.

2. The pumped storage power station reservoir cleaning device according to claim 1, characterized in that, The cleaning assembly includes two support frames I fixed to one side of the dam body. Multiple rotating rollers are rotatably arranged between the two support frames I. A conveyor belt is sleeved on the outside of the multiple rotating rollers. A scraper is fixed on the outside of the conveyor belt. One end of the rotating roller at the top is connected to the output end of a motor inside the support frame II.

3. The pumped storage power station reservoir cleaning device according to claim 2, characterized in that, The top of the cleaning component is inclined toward the collection box so that the debris scraped off by the scraper from the outside of the water inlet I falls into the collection box under gravity when it runs to the top with the conveyor belt.

4. The pumped storage power station reservoir cleaning device according to claim 2, characterized in that, The inner side of the support frame I is fixed with a baffle plate, and the scraper plate is located between the two baffle plates.

5. The pumped storage power station reservoir cleaning device according to claim 2, characterized in that, The support frame II is also equipped with a wind turbine generator set and a storage battery. The electrical energy generated by the wind turbine generator set is stored in the storage battery, which provides power to the motor in the support frame II.

6. A method for operation and maintenance of a pumped storage power station reservoir cleaning device according to any one of claims 2-5, characterized in that, Includes the following steps: S1. When the power load is low, the pumping unit operates. The water in the lower tank flows through the filter components. In the S-shaped flow channel formed by multiple sets of staggered baffles, the quartz sand particles in the water lose kinetic energy and slide down into the storage chamber under the action of gravity, and are discharged by the conveying components. S2. The shearing blades are driven to reciprocate by the drive shaft, which works with the baffle plate to cut the water plants in the water flow and drop them into the storage chamber. At the same time, the drive shaft drives the shaftless spiral conveyor blades in the storage chamber to rotate synchronously, slowly pushing the mud and small debris accumulated in the storage chamber to one side of the lower tank body. The staff only need to set up a collection device to clean them uniformly to avoid the accumulation of mud and sand and blockage of the storage chamber. S3. During peak power load periods, the hydro-generator unit operates, and the motor of the cleaning component drives the conveyor belt to move, which in turn drives the scraper to scrape off the debris attached to the outside of the water inlet I and convey it upwards, so that the debris falls into the collection box for unified collection.

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