Header drainage system for pumped storage power station

Abstract

The utility model discloses a diversion channel drainage system for a pumped storage power station, and belongs to the technical field of drainage systems. Comprising a drainage pipe body and diversion pipes, multiple groups of diversion pipes are arranged on the outer wall of the drainage pipe body at equal intervals, the diversion pipes are communicated with the drainage pipe body, electromagnetic valves are arranged in the diversion pipes, a limiting ring is arranged at a port of the drainage pipe body, and a driving seat is arranged on the side wall, on one side of the limiting ring, of the drainage pipe body; a first waterproof motor is arranged on the side wall of the driving base, a worm is installed at the output end of the first waterproof motor, and the worm is movably connected with the driving base. According to the utility model, not only are multi-pipeline split-flow drainage realized and the pressure on the main pipeline reduced, sundries on the surface of the filter plate can be conveniently scraped, swept and cleaned, and the filter plate can be quickly disassembled, assembled and replaced, but also the convenience of replacing the filter plate and the safety of the main pipeline in use are improved.

Description

Technical Field

[0001] This utility model relates to the field of drainage system technology, specifically a drainage system for a pumped storage power station. Background Technology

[0002] Pumped storage power stations are hydroelectric power stations that utilize electricity generated during periods of low electricity load to pump water to an upper reservoir and release it to a lower reservoir during periods of high electricity load to generate electricity. They have functions such as peak shaving, frequency regulation, phase regulation, and emergency backup. Power stations all have drainage systems such as gravity drainage tunnels and sump pits. Traditional methods of emptying the water intake channel involve using the drain pipes of the unit's ball valves to discharge water into the gravity drainage tunnel and then allowing it to flow out of the powerhouse by gravity, or first draining the water into the sump pit and then pumping it out of the powerhouse. However, if the instantaneous flow rate in the drainage channel is large, it can easily put pressure on the inner wall of the pipe. If the pressure is too high, it can easily lead to pipe rupture. To improve this situation, a drainage system for the water intake channel of pumped storage power stations is proposed.

[0003] As disclosed in the authorization announcement number CN212129076U, a water intake drainage system for a pumped storage power station includes a water intake channel, a construction adit plug connected to the middle tunnel of the water intake channel, and a unit ball valve connected to the lower tunnel of the water intake channel; a drainage pipe communicating with the middle tunnel is provided inside the construction adit plug, and a drainage valve is provided on the drainage pipe.

[0004] Although it achieves a drainage system that forms a water intake channel through the unit ball valve at the lower level tunnel and the drainage pipe at the middle level tunnel, with the drainage pipe used to discharge water above the middle level tunnel and the unit ball valve used to discharge water below the middle level tunnel; through the layered drainage at these two locations, the water intake channel can be emptied relatively quickly, while reducing the pressure of the water intake channel below the middle level tunnel.

[0005] However, it did not solve the problems that the existing drainage system is not conducive to multi-pipe drainage and reducing the pressure on the main pipe, nor to scraping and cleaning debris on the surface of the filter plate and quickly disassembling and replacing the filter plate, which affected the convenience of filter plate replacement and the safety of the main pipe during use. Utility Model Content

[0006] The purpose of this utility model is to provide a drainage system for a pumped storage power station, in order to solve the problems mentioned in the background art, such as the inconvenience of multiple pipes for drainage and the reduction of pressure on the main pipe, the difficulty in scraping and cleaning debris on the surface of the filter plate and the quick disassembly and replacement of the filter plate, which affect the convenience of filter plate replacement and the safety of the main pipe during use.

[0007] To address the technical problems mentioned in the background section, some embodiments of this application provide a drainage system for a pumped storage power station, comprising a drainage pipe body and branch pipes. The outer wall of the drainage pipe body is provided with multiple branch pipes spaced at equal intervals, and the branch pipes are connected to the drainage pipe body. Each branch pipe is equipped with a solenoid valve. A limit ring is provided at the port of the drainage pipe body. A drive seat is provided on the side wall of the drainage pipe body on one side of the limit ring. A first waterproof motor is provided on the side wall of the drive seat. A worm gear is installed at the output end of the first waterproof motor and is movably connected to the drive seat. A valve plate is slidably disposed inside the drainage pipe body on one side of the drive seat, and movable shafts are symmetrically arranged on the side wall of the valve plate.

[0008] Furthermore, the valve plate is movably connected to the drain pipe body via a movable shaft, and a set of movable shafts extends into the interior of the drive seat and is movably connected to the drive seat.

[0009] Furthermore, a worm gear is fitted onto the surface of the movable shaft inside the drive seat, and the worm and the worm gear mesh with each other.

[0010] Furthermore, a grid filter plate is provided inside the limiting ring, and four sets of limiting blocks with equal spacing are provided on the outer wall of the limiting ring.

[0011] Furthermore, the inner wall of the limiting ring is provided with four sets of L-shaped grooves at equal intervals, and the limiting block is slidably connected to the L-shaped grooves.

[0012] Furthermore, an integrated frame is provided on the outer wall of one side of the limiting ring, and a sliding rod is provided on the outer wall of the other side of the limiting ring.

[0013] Furthermore, a lead screw is provided inside the integrated frame, and the lead screw is movably connected to the integrated frame.

[0014] Furthermore, a second waterproof motor is provided at the bottom of the integrated frame, and the output end of the second waterproof motor is connected to the lead screw.

[0015] Furthermore, the surface of the lead screw is provided with a threaded sleeve, and the threaded sleeve is threadedly connected to the lead screw.

[0016] Furthermore, a scraper is provided on the side wall of the threaded sleeve, and the scraper is slidably connected to the grid filter plate and to the slide rod.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the drainage system not only realizes multi-pipe diversion drainage and reduces the pressure on the main pipe, but also facilitates the scraping and cleaning of debris on the surface of the filter plate and the quick disassembly and replacement of the filter plate, and improves the convenience of filter plate replacement and the safety of the main pipe during use.

[0018] Pumped-storage hydroelectric power stations require water to be drawn into turbines via a water intake channel to generate electricity. After power generation, this water needs to be discharged through a drainage pipe. A first waterproof motor drives a worm gear, which in turn drives a set of movable shafts via a worm wheel. The worm wheel, in turn, drives a valve plate via the movable shafts, opening the internal channel of the drainage pipe. The water flows into the drainage pipe after being filtered by a grid filter plate. If this water flow rushes into the drainage pipe at the same time, it will cause an excessive instantaneous flow rate and water pressure, which will put pressure on the drainage pipe from the inside. To prevent damage to the drainage pipe due to excessive pressure, a solenoid valve is opened to open the internal channel of the diversion pipe. The water flows out through multiple diversion pipes, reducing the instantaneous flow rate inside the drainage pipe and thus reducing the pressure. This provides indirect protection for the drainage pipe and achieves multi-pipe diversion drainage, reducing the pressure on the main pipeline.

[0019] When water flows through the bar screen into the drain pipe, external debris is blocked by the bar screen. However, after prolonged use, debris accumulates, affecting the filtration efficiency of the bar screen. A second waterproof motor drives a lead screw to rotate, which in turn moves a threaded sleeve, which in turn moves a scraper. The scraper cleans the bar screen, removing debris from its surface and into the water, thus preventing clogging. When the bar screen needs replacement, it should be done during a period of drainage cessation by rotating the bar screen. The bar screen filter plate drives the limiting block to rotate inside the L-shaped groove. Because the limiting block and the L-shaped groove are interference-fitted, and under the action of water flow pressure, the bar screen filter plate will not fall off inside the limiting ring during normal use. When the limiting block rotates to the turning point of the L-shaped groove, the bar screen filter plate can be pulled out to remove it from inside the limiting ring. Then, a new bar screen filter plate can be installed back inside the limiting ring. This facilitates the scraping and cleaning of debris on the surface of the filter plate, prevents debris from clogging the filter plate, and facilitates quick disassembly and replacement of the filter plate, improving the convenience of filter plate replacement. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0021] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0022] In the attached diagram:

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional perspective structural diagram of the drainage pipe body of this utility model;

[0025] Figure 3 This is a frontal cross-sectional view of the present invention.

[0026] Figure 4 This is a three-dimensional structural diagram of the limiting ring and the grid filter plate of this utility model;

[0027] Figure 5 This is a side view sectional structural diagram of the integrated frame of this utility model.

[0028] Figure label:

[0029] 1. Drainage pipe body; 2. Drive seat; 3. Limiting ring; 4. Integrated frame; 5. Diverter pipe; 6. Valve plate; 7. Worm gear; 8. First waterproof motor; 9. Movable shaft; 10. Worm wheel; 11. L-shaped groove; 12. Limiting block; 13. Grille filter plate; 14. Second waterproof motor; 15. Threaded sleeve; 16. Lead screw; 17. Scraper; 18. Solenoid valve; 19. Slide rod. Detailed Implementation

[0030] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0031] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0032] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0033] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0034] Please see Figure 1-5This utility model provides an embodiment of a drainage system for a pumped storage power station, comprising a drainage pipe body 1 and branch pipes 5. Multiple branch pipes 5 are arranged at equal intervals on the outer wall of the drainage pipe body 1, and the branch pipes 5 are connected to the drainage pipe body 1. Each branch pipe 5 is equipped with a solenoid valve 18. A limit ring 3 is provided at the port of the drainage pipe body 1. A drive seat 2 is provided on the side wall of the drainage pipe body 1 on one side of the limit ring 3. A first waterproof motor 8 is provided on the side wall of the drive seat 2. 8 serves as the power drive. The output end of the first waterproof motor 8 is equipped with a worm gear 7, which is movably connected to the drive seat 2. A valve plate 6 is slidably arranged inside the drain pipe body 1 on one side of the drive seat 2. A movable shaft 9 is symmetrically arranged on the side wall of the valve plate 6, and the valve plate 6 is movably connected to the drain pipe body 1 through the movable shaft 9. A set of movable shafts 9 extends into the interior of the drive seat 2 and is movably connected to the drive seat 2. A worm wheel 10 is fitted on the surface of the movable shaft 9 inside the drive seat 2, and the worm gear 7 and the worm wheel 10 mesh with each other.

[0035] In a pumped-storage power station, water needs to be drawn into a turbine through a water intake channel to drive the turbine and generate electricity. After power generation, this water needs to be discharged through the drain pipe 1. At this time, the first waterproof motor 8 is turned on, which drives the worm 7 to rotate. Under the mutual meshing of the worm 7 and the worm wheel 10, the worm 7 drives a set of movable shafts 9 to rotate through the worm wheel 10. Under the movable cooperation between the movable shafts 9 and the drain pipe 1, the worm wheel 10 drives the valve plate 6 to rotate through the movable shafts 9, thereby opening the internal channel of the drain pipe 1. The water flows through the grid filter plate 13. After filtration, the water enters the interior of drain pipe 1. If this portion of the water flows into drain pipe 1 simultaneously, it will cause an excessive instantaneous flow rate and excessive water pressure. This will put pressure on drain pipe 1 from the inside. To prevent excessive pressure from damaging drain pipe 1, solenoid valve 18 is opened to open the channel inside diversion pipe 5. The water flows out through multiple diversion pipes 5 to reduce the instantaneous flow rate inside drain pipe 1, thereby reducing the pressure and providing indirect protection for drain pipe 1. This achieves multi-pipe diversion drainage and reduces the pressure on the main pipe.

[0036] The limiting ring 3 has a grid filter plate 13 inside, four sets of equally spaced limiting blocks 12 are provided on the outer wall of the limiting ring 3, and four sets of equally spaced L-shaped grooves 11 are provided on the inner wall of the limiting ring 3, and the limiting blocks 12 are slidably connected to the L-shaped grooves 11.

[0037] An integrated frame 4 is provided on one side of the outer wall of the limiting ring 3, and a slide bar 19 is provided on the other side of the outer wall of the limiting ring 3.

[0038] The integrated frame 4 has a lead screw 16 inside, and the lead screw 16 is movably connected to the integrated frame 4. The bottom end of the integrated frame 4 is provided with a second waterproof motor 14, which plays the role of power drive, and the output end of the second waterproof motor 14 is connected to the lead screw 16.

[0039] The lead screw 16 is provided with a threaded sleeve 15, and the threaded sleeve 15 is threadedly connected to the lead screw 16. A scraper 17 is provided on the side wall of the threaded sleeve 15, and the scraper 17 is slidably connected to the grid filter plate 13 and the scraper 17 is slidably connected to the slide rod 19.

[0040] When water flows through the bar screen 13 into the drain pipe 1, external debris is blocked by the bar screen 13. However, after prolonged use, the debris accumulates, affecting the filtration effect of the bar screen 13. At this point, the second waterproof motor 14 is activated, driving the lead screw 16 to rotate. With the lead screw 16 threadedly connected to the threaded sleeve 15, the lead screw 16 moves the threaded sleeve 15. Through the sliding engagement of the scraper 17 and the slide rod 19, the threaded sleeve 15 moves the scraper 17, which scrapes the bar screen 13, removing debris from its surface into the water to prevent clogging. When it is necessary to further clean the bar screen 13... When replacing the filter plate, the replacement time should be selected during the period when drainage is stopped. Rotate the bar screen filter plate 13, which will drive the limiting block 12 to rotate inside the L-shaped groove 11. Since the limiting block 12 and the L-shaped groove 11 are interference fit, and under the action of water flow pressure, the bar screen filter plate 13 will not fall off inside the limiting ring 3 during normal use. When the limiting block 12 rotates to the turning point of the L-shaped groove 11, pull the bar screen filter plate 13 to remove it from inside the limiting ring 3. Then replace it with a new bar screen filter plate 13 and install it back into the limiting ring 3. This makes it convenient to scrape and clean the debris on the surface of the filter plate, prevent debris from clogging the filter plate, facilitate quick disassembly and replacement of the filter plate, and improve the convenience of filter plate replacement.

[0041] Pumped storage power stations require water to be drawn into a turbine via a water intake channel to generate electricity. After power generation, this water needs to be discharged through the drain pipe 1. The first waterproof motor 8 drives the worm gear 7 to rotate, which in turn drives a set of movable shafts 9 via a worm wheel 10. Through the movable shafts 9 and the drain pipe 1, the worm wheel 10 drives the valve plate 6 to rotate, opening the internal passage of the drain pipe 1. The water then flows into the drain pipe 1 after being filtered by the grid filter plate 13. If this portion of the water flows simultaneously... If water flows into the drain pipe 1, it will cause an excessive instantaneous flow rate and excessive water pressure. This will create pressure on the drain pipe 1 from within. To prevent damage to the drain pipe 1 due to excessive pressure, the solenoid valve 18 is opened to open the channel inside the diversion pipe 5. The water flows out through the multi-group diversion pipe 5, reducing the instantaneous flow rate inside the drain pipe 1 and thus reducing the pressure. This provides indirect protection for the drain pipe 1. When the water flows through the bar screen 13 into the drain pipe 1, external debris will be blocked by the bar screen 13. However, after prolonged use, debris will accumulate, affecting the filtration effect of the bar filter plate 13. The second waterproof motor 14 drives the lead screw 16 to rotate, which in turn moves the threaded sleeve 15, which in turn moves the scraper 17. The scraper 17 scrapes the bar filter plate 13, removing debris from its surface into the water to prevent clogging. When the bar filter plate 13 needs replacement, it should be done during a period of drainage cessation. The bar filter plate 13 is rotated... The bar screen 13 drives the limiting block 12 to rotate inside the L-shaped groove 11. Because the limiting block 12 and the L-shaped groove 11 are interference fit, and under the action of water flow pressure, the bar screen 13 will not fall off inside the limiting ring 3 during normal use. When the limiting block 12 rotates to the turning point of the L-shaped groove 11, the bar screen 13 is pulled out to remove it from inside the limiting ring 3. Then, a new bar screen 13 is installed back into the limiting ring 3. The above is the complete usage of the water intake drainage system for pumped storage power stations.

[0042] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A drainage system for a pumped storage power station, comprising a drainage pipe body (1) and a branch pipe (5), characterized in that: The outer wall of the drain pipe body (1) is provided with multiple diversion pipes (5) at equal intervals, and the diversion pipes (5) are connected to the drain pipe body (1). The interior of each diversion pipe (5) is provided with a solenoid valve (18). A limit ring (3) is provided at the port of the drain pipe body (1). A drive seat (2) is provided on the side wall of the drain pipe body (1) on one side of the limit ring (3). A first waterproof motor (8) is provided on the side wall of the drive seat (2). A worm gear (7) is installed at the output end of the first waterproof motor (8), and the worm gear (7) is movably connected to the drive seat (2). A valve plate (6) is slidably provided inside the drain pipe body (1) on one side of the drive seat (2). A movable shaft (9) is symmetrically provided on the side wall of the valve plate (6).

2. The drainage system for a pumped storage power station according to claim 1, characterized in that: The valve plate (6) is movably connected to the drain pipe body (1) via a movable shaft (9), and a set of movable shafts (9) extends into the interior of the drive seat (2) and is movably connected to the drive seat (2).

3. The drainage system for a pumped storage power station according to claim 2, characterized in that: The surface of the movable shaft (9) inside the drive seat (2) is fitted with a worm gear (10), and the worm (7) and the worm gear (10) mesh with each other.

4. The water intake drainage system for a pumped storage power station according to claim 3, characterized in that: The limiting ring (3) is provided with a grid filter plate (13) inside, and four sets of limiting blocks (12) with equal spacing are provided on the outer wall of the limiting ring (3).

5. The water intake drainage system for a pumped storage power station according to claim 4, characterized in that: The inner wall of the limiting ring (3) is provided with four sets of L-shaped grooves (11) with equal spacing, and the limiting block (12) is slidably connected to the L-shaped grooves (11).

6. The drainage system for a pumped storage power station according to claim 5, characterized in that: An integrated frame (4) is provided on one side of the outer wall of the limiting ring (3), and a slide rod (19) is provided on the other side of the outer wall of the limiting ring (3).

7. The drainage system for a pumped storage power station according to claim 6, characterized in that: The integrated frame (4) is provided with a lead screw (16) inside, and the lead screw (16) is movably connected to the integrated frame (4).

8. The drainage system for a pumped storage power station according to claim 7, characterized in that: The bottom end of the integrated frame (4) is provided with a second waterproof motor (14), and the output end of the second waterproof motor (14) is connected to the lead screw (16).

9. The water intake drainage system for a pumped storage power station according to claim 8, characterized in that: The surface of the lead screw (16) is provided with a threaded sleeve (15), and the threaded sleeve (15) is threadedly connected to the lead screw (16).

10. The water intake drainage system for a pumped storage power station according to claim 9, characterized in that: A scraper (17) is provided on the side wall of the threaded sleeve (15), and the scraper (17) is slidably connected to the grid filter plate (13), and the scraper (17) is slidably connected to the slide rod (19).

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