A pumped storage unit for natural water sources

Abstract

The present application discloses a pumped storage unit for natural water sources, including a generator motor, a pump turbine, a downpipe, a first outlet pipe, a second outlet pipe and a sediment removal unit, the rotating shaft of the generator motor and the rotating shaft of the pump turbine are connected by a connecting shaft, the pump turbine includes a pump casing, a runner, a guide vane, an inlet pipe connected to the pump casing and a tailwater pipe connected to the pump casing, the downpipe is connected to the inlet pipe, the tailwater pipe is connected to the first outlet pipe, the first outlet pipe is connected to the sediment removal unit, and the sediment removal unit is connected to the second outlet pipe. The pumped storage unit of the present application, when releasing water to the downstream reservoir for power generation, the sediment in the water source is discharged through the downpipe by the sediment removal unit, thereby avoiding the impact and scratching of the sediment on the pipeline, effectively reducing the damage of the sediment to the pipeline, and at the same time, the iron filings and broken iron blocks in the water source can be adsorbed to the bottom by the electromagnet unit below and discharged together with the sediment.

Description

Technical Field

[0001] The present invention relates to the technical field of pumped storage units, and more specifically, to a pumped storage unit for natural water sources. Background Art

[0002] Pumped storage is a type of energy storage technology that uses water as an energy storage medium. It uses electricity during low load periods to pump water from downstream reservoirs to upstream reservoirs. During peak load periods, water from upstream reservoirs is released to downstream reservoirs for power generation. Through the mutual conversion of electrical energy and potential energy, electrical energy storage and management are achieved, and excess electrical energy during low load periods of the power grid can be converted into high-value electrical energy during peak load periods of the power grid. Therefore, accelerating the development of pumped storage is an important guarantee for the development of renewable energy.

[0003] In existing pumped-storage power stations, grilles are usually installed at the water inlet and outlet of the upstream and downstream reservoirs to block larger garbage or debris in the water source. Since the pumped-storage power station uses natural water sources, there is a lot of sediment in the natural water source. However, the grilles are difficult to block the sediment in the water source, and the implementation of pumping and releasing projects is relatively frequent, especially when photovoltaic power generation is used for pumping, and a water release and pumping project is carried out every day. If the sediment in the water source is not treated for a long time, the frequent pumping and releasing projects will cause the sediment to collide and scratch the internal water pipes, which will cause great damage to the pipes in the long run, affecting their service life and increasing maintenance costs. In addition, the sediment in the water source will cause great wear on important parts of the turbine. Long-term wear will increase the number of turbine maintenance, greatly reduce the working efficiency of the turbine, and directly affect the power generation effect of the pumped-storage power station. At the same time, the large amount of sediment in the water source will also be prone to siltation. The siltation causes a significant reduction in the capacity of the reservoir, greatly reducing the power generation effect of the pumped-storage power station. Summary of the invention

[0004] The present invention aims to overcome the defects of the prior art and provide a pumped storage unit for natural water sources.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pumped storage unit, comprising a generator motor, a pump-turbine, a downpipe, a first water outlet pipe, a second water outlet pipe and a silt removal unit, the rotating shaft of the generator motor and the rotating shaft of the pump-turbine are connected by a connecting shaft, the pump-turbine comprises a pump casing, a runner, a guide vane, an inlet pipe connected to the pump casing and a tailwater pipe connected to the pump casing, the downpipe is connected to the inlet pipe, the tailwater pipe is connected to the first water outlet pipe, the first water outlet pipe is connected to the silt removal unit, and the silt removal unit is connected to the second water outlet pipe.

[0006] Furthermore, the mud and sand removal unit includes a cylindrical tube portion, a rotating tube located inside the cylindrical tube portion, a surrounding tube surrounding the cylindrical tube portion, a lower sand tube connected to the surrounding tube, and two mounting tubes fixedly connected to the surrounding tube; two annular fixing rings are fixed in the cylindrical tube portion, the fixing rings have annular limiting grooves, the two ends of the rotating tube are respectively inserted into the limiting grooves of the two fixing rings, and a rotating bearing is connected between each end of the rotating tube and the corresponding fixing ring; the cylindrical tube portion has a first opening and two arc-shaped through grooves connected to the first opening, and a slide plate unit is fixedly installed at each arc-shaped through groove, and the slide plate unit has an arc-shaped slide groove; the rotating tube There is a second opening at the place, and two arc-shaped iron blocks are fixed at the rotating tube, and the two arc-shaped iron blocks correspond to the two slide plate units one by one, respectively, and each arc-shaped iron block is embedded in the corresponding slide plate unit; the surrounding tube includes two frustum-shaped end tubes connected to the cylindrical tube part and a cylindrical middle tube connecting the two end tubes; the lower sand pipe includes a lower material pipe, a lower material hopper connected to the lower material pipe, and a lower material pipe valve installed at the lower material pipe, and the lower material hopper is connected to the middle pipe; two mounting pipes are connected to the middle pipe, and an upper mounting platform and a lower mounting platform are fixedly installed at each mounting pipe, and an upper electromagnet unit is installed at the upper mounting platform, and a lower electromagnet unit is installed at the lower mounting platform.

[0007] Through the adsorption effect of the electromagnet unit, the arc-shaped iron block can slide in the slide plate unit, thereby the rotating tube realizes rotation.

[0008] Furthermore, a sand receiving plate is installed at the surrounding pipe, and the sand receiving plate has a plurality of sand discharge holes.

[0009] As a result, the mud and sand are deposited on the sand receiving plate and flow into the discharge pipe through the sand discharge hole.

[0010] Furthermore, multiple sand discharge holes are distributed in a rectangular array, and each column of sand discharge holes corresponds to an anti-backflow plate. The anti-backflow plate is hinged to the lower surface of the sand receiving plate through an elastic reset hinge component. When there is no external force, the anti-backflow plate blocks the corresponding column of sand discharge holes; the distribution direction of each column of sand discharge holes is perpendicular to the axial direction of the cylindrical tube portion.

[0011] Therefore, the anti-backflow plate can effectively prevent the sediment from flowing back into the surrounding pipe.

[0012] Furthermore, the chute plate unit includes two end arc plates and an arc surface connecting plate connecting the two end arc plates.

[0013] Furthermore, the outer diameter of the arc-shaped iron block is equal to the inner diameter of the arc-surface connecting plate; and the two end surfaces of the arc-shaped iron block respectively abut against the two end arc-shaped plates of the corresponding chute plate unit.

[0014] Thereby the arc-shaped iron block can slide in the slide plate unit.

[0015] Furthermore, one end of the mounting tube is welded and fixed to the middle tube, and the other end has a mounting flange.

[0016] This facilitates installation of the fixed sediment removal unit.

[0017] Furthermore, both ends of the cylindrical tube portion have connecting flanges.

[0018] This facilitates fixed connection of the sediment removal unit to the first water outlet pipe and the second water outlet pipe.

[0019] Furthermore, the ends of the two fixing rings away from the first opening both have chamfers.

[0020] Furthermore, when the two upper electromagnet units are turned on and the two lower electromagnet units are turned off, the rotating tube can completely cover the first opening; when the two upper electromagnet units are turned off and the two lower electromagnet units are turned on, the first opening faces the second opening, and the first opening faces the sand receiving plate.

[0021] When the second opening faces the first opening, the water flow velocity decreases, thereby facilitating sediment deposition; when the rotating tube completely blocks the first opening, the water flow velocity remains unchanged, thereby facilitating water pumping.

[0022] Furthermore, the two mounting tubes are connected by a plurality of connecting rods, and the plurality of connecting rods are distributed in a ring shape with equal intervals.

[0023] Thus, the two mounting pipes can be stably connected through a plurality of connecting rods.

[0024] Furthermore, a guide vane angle adjustment unit is also included.

[0025] Furthermore, the middle pipe has a discharge hole facing the discharge hopper.

[0026] Thereby, the mud and sand flow down into the discharge pipe through the discharge hole.

[0027] Beneficial effects:

[0028] 1. When the pumped storage unit of the present application releases water to the downstream reservoir for power generation, the sediment in the water source is discharged through the lower sediment pipe by the sediment removal unit, thereby avoiding the impact and scratch of the pipeline by the sediment, and effectively reducing the damage of the sediment to the pipeline.

[0029] 2. When only the lower electromagnet unit is turned on, the arc-shaped iron block of the rotating tube is adsorbed by the lower electromagnet unit so that the second opening of the rotating tube faces the first opening of the cylindrical tube portion, and the mud and sand in the water source are deposited on the sand receiving plate. At the same time, the iron filings and broken iron blocks in the water source can be adsorbed to the bottom through the lower electromagnet unit and discharged together with the mud and sand.

[0030] 3. When pumping water to the upstream reservoir, only the upper electromagnet unit is turned on, so that the rotating tube completely covers the first opening of the cylindrical tube part. When the water source passes through the sediment removal unit, the flow rate of the water flow remains unchanged, thereby achieving a good water supply effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of pumped storage unit;

[0032] Figure 2 Schematic diagram of sediment removal unit;

[0033] Figure 3 Schematic diagram of the separation of the rotating tube from the sediment removal unit;

[0034] Figure 4 Schematic diagram of two lower electromagnet units being turned on and two upper electromagnet units being turned off;

[0035] Figure 5 Schematic diagram of two upper electromagnet units being turned on and two lower electromagnet units being turned off;

[0036] Figure 6 It is a schematic diagram of the separation of the rotating tube and the cylindrical tube part;

[0037] For the sake of clarity, Figure 4-6 In the embodiment, the cylindrical tube part, the surrounding tube and the two mounting plates are cut in half.

[0038] Description of reference numerals:

[0039] 1 generator motor; 2 pump turbine; 2.1 water inlet pipe; 2.2 tail water pipe; 3 down pipe; 4 first water outlet pipe; 5 second water outlet pipe;

[0040] 6 cylindrical tube; 6.1 fixing ring; 6.1.1 limiting groove; 6.2 first opening; 6.3 slide plate unit; 6.3.1 end arc plate; 6.3.2 arc surface connecting plate; 6.4 connecting flange;

[0041] 7 rotating tube; 7.1 second opening; 7.2 arc-shaped iron block; 7.3 rotating bearing;

[0042] 8 surrounding pipe; 8.1 end pipe; 8.2 middle pipe; 8.3 sand connecting plate; 8.3.1 sand lowering hole; 8.4 anti-return plate;

[0043] 9 sand discharge pipe; 9.1 material discharge pipe; 9.2 material discharge hopper; 9.3 material discharge pipe valve;

[0044] 10 Mounting pipe; 10.1 Upper mounting platform; 10.1.1 Upper electromagnet unit; 10.2 Lower mounting platform; 10.2.1 Lower electromagnet unit; 10.3 Mounting flange; 10.4 Connecting rod. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The present invention provides Figure 1-6 A pumped storage unit for natural water sources shown in the figure comprises a generator motor 1, a pump turbine 2, a downpipe 3, a first water outlet pipe 4, a second water outlet pipe 5 and a sediment removal unit, wherein the rotating shaft of the generator motor 1 and the rotating shaft of the pump turbine 2 are connected by a connecting shaft, the pump turbine 2 comprises a pump casing, a runner, a guide vane, an inlet pipe 2.1 connected to the pump casing and a tailwater pipe 2.2 connected to the pump casing, the downpipe 3 is connected to the inlet pipe 2.1, the tailwater pipe 2.2 is connected to the first water outlet pipe 4, the first water outlet pipe 4 is connected to the sediment removal unit, and the sediment removal unit is connected to the second water outlet pipe 5.

[0047] The silt removal unit comprises a cylindrical tube portion 6, a rotating tube 7 located inside the cylindrical tube portion 6, a surrounding tube 8 surrounding the cylindrical tube portion 6, a lower sand tube 9 connected to the surrounding tube 8, and two mounting tubes 10 fixedly connected to the surrounding tube 8; two annular fixing rings 6.1 are fixed in the cylindrical tube portion 6, and the fixing rings 6.1 have annular limiting grooves 6.1.1, and the two ends of the rotating tube 7 are respectively inserted into the limiting grooves 6.1.1 of the two fixing rings, and a rotating bearing 7.3 is connected between each end of the rotating tube 7 and the corresponding fixing ring 6.1; the cylindrical tube portion 6 has a first opening 6.2 and two arc-shaped through grooves connected to the first opening 6.2, and a slide plate unit 6.3 is fixedly installed at each arc-shaped through groove, and the slide plate unit 6.3 has an arc-shaped slide groove; the rotating tube 7 has a second opening 7.1, and two The arc-shaped iron blocks 7.2 correspond to the two chute plate units 6.3 respectively, and each arc-shaped iron block 7.2 is embedded in the corresponding chute plate unit 6.3; the surrounding pipe 8 includes two frustum-shaped end pipes 8.1 connected to the cylindrical pipe part 6 and a cylindrical middle pipe 8.2 connecting the two end pipes 8.1; the lower sand pipe 9 includes a lower material pipe 9.1, a lower material hopper 9.2 connected to the lower material pipe 9.1, and a lower material pipe valve 9.3 installed at the lower material pipe 9.1, and the lower material hopper 9.2 is connected to the middle pipe 8.2; two mounting pipes 10 are connected to the middle pipe 8.2, and each mounting pipe 10 is fixedly installed with an upper mounting platform 10.1 and a lower mounting platform 10.2, the upper mounting platform 10.1 is installed with an upper electromagnet unit 10.1.1, and the lower mounting platform 10.2 is installed with a lower electromagnet unit 10.2.1.

[0048] A sand receiving plate 8.3 is installed at the surrounding pipe 8, and the sand receiving plate 8.3 has a plurality of sand discharge holes 8.3.1; the plurality of sand discharge holes 8.3.1 are distributed in a rectangular array, and each column of sand discharge holes 8.3.1 corresponds to an anti-return plate 8.4, and the anti-return plate 8.4 is hinged to the lower surface of the sand receiving plate 8.3 by an elastic reset hinge component. When there is no external force, the anti-return plate 8.4 blocks the corresponding column of sand discharge holes 8.3.1; the distribution direction of each column of sand discharge holes 8.3.1 is perpendicular to the axial direction of the cylindrical tube part 6; the chute plate unit 6.3 includes two end arc plates 6.3.1 and an arc surface connecting plate 6.3.2 connecting the two end arc plates 6.3.1; the outer diameter of the arc iron block 7.2 is equal to the inner diameter of the arc surface connecting plate 6.3.2; the two end faces of the arc iron block 7.2 respectively abut against the two end arc plates 6.3.1 of the corresponding chute plate unit 6.3.

[0049] One end of the mounting tube 10 is welded and fixed to the middle tube 8.2, and the other end has a mounting flange 10.3; both ends of the cylindrical tube portion 6 have connecting flanges 6.4; the two ends of the two fixing rings 6.1 away from the first opening 6.2 are both chamfered; when the two upper electromagnet units 10.1.1 are turned on and the two lower electromagnet units 10.2.1 are turned off, the rotating tube 7 can completely cover the first opening 6.2; when the two upper electromagnet units 10.1.1 are turned off and the two lower electromagnet units 10.2.1 are turned on, the first opening 6.2 faces the second opening 7.1, and the first opening 6.2 faces the sand receiving plate 8.3; the two mounting tubes 10 are connected by a plurality of connecting rods 10.4, and the plurality of connecting rods 10.4 are distributed in a ring-shaped manner with equal spacing.

[0050] Working principle: The pumped storage unit of the present application, when releasing water to the downstream reservoir for power generation, discharges the silt in the water source out of the entire system through the silt removal unit, thereby avoiding the collision and scratching of the pipeline by the silt, and effectively reducing the damage of the pipeline to the silt. When only the lower electromagnet unit is turned on, the arc-shaped iron block of the rotating tube is adsorbed by the lower electromagnet unit so that the second opening of the rotating tube faces the first opening of the cylindrical pipe part, and the silt in the water source is deposited on the sand receiving plate. At the same time, the iron filings and broken iron blocks in the water source can also be adsorbed to the bottom through the lower electromagnet unit and discharged together with the silt. When pumping water to the upstream reservoir, only the upper electromagnet unit is turned on, so that the rotating tube completely blocks the first opening of the cylindrical pipe part. When the water source passes through the silt removal unit, the flow rate of the water flow remains unchanged, thereby achieving a good water supply effect.

[0051] Specifically, when water is released from the upstream reservoir to the downstream reservoir for power generation, the two upper electromagnet units are closed and the two lower electromagnet units are opened. Since the two arc-shaped iron blocks at the rotating tube are respectively adsorbed by the two lower electromagnet units, the second opening of the rotating tube faces the first opening of the cylindrical tube portion, and the first opening faces the sand receiving plate. At this time, after the water source flows into the sediment removal unit, the water flow velocity becomes smaller, which is conducive to the descent and deposition of sediment. The sediment in the water source is deposited on the sand receiving plate. Due to the weight of the sediment and the effect of the water flow, the anti-backflow plate rotates open, and the sediment flows downward into the lower sand pipe, and the anti-backflow plate can prevent The invention can prevent silt from flowing back into the pipeline. When the silt reaches a certain amount, it will be discharged through the discharge pipe. In addition to silt, iron filings or broken iron blocks in the water source will also be adsorbed by the lower electromagnet unit to the bottom and then discharged from the discharge pipe. When the water source is pumping water from the downstream reservoir to the upstream reservoir, the two upper electromagnet units are turned on and the two lower electromagnet units are closed. Since the two arc-shaped iron blocks at the rotating tube are respectively adsorbed by the two upper electromagnet units, the rotating tube completely blocks the first opening of the cylindrical tube part, and the diameter of the entire waterway remains unchanged. When the water source passes through the silt removal unit, the flow rate of the water flow remains unchanged, thereby achieving a good water supply effect.

[0052] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be appreciated by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A pumped storage unit for natural water sources, characterized in that: The invention comprises a generator motor, a water pump turbine, a downpipe, a first water outlet pipe, a second water outlet pipe and a sediment removal unit, wherein the rotating shaft of the generator motor and the rotating shaft of the water pump turbine are connected by a connecting shaft, the water pump turbine comprises a pump casing, a runner, a guide vane, an inlet pipe connected to the pump casing and a tailwater pipe connected to the pump casing, the downpipe is connected to the inlet pipe, the tailwater pipe is connected to the first water outlet pipe, the first water outlet pipe is connected to the sediment removal unit, and the sediment removal unit is connected to the second water outlet pipe; the sediment removal unit comprises a cylindrical pipe portion, a cylindrical pipe portion located in the cylindrical pipe portion, a guide vane, a water inlet pipe connected to the water pump casing, a tailwater pipe connected to the first water outlet pipe, a first water outlet pipe connected to the sediment removal unit, and a second water outlet pipe connected to the sediment removal unit; the sediment removal unit comprises a cylindrical pipe portion, a cylindrical pipe portion located in the cylindrical pipe portion, a guide vane, a guide vane, a water inlet pipe connected to the ... The inner rotating tube, the surrounding tube surrounding the cylindrical tube part, the lower sand tube connected to the surrounding tube and two mounting tubes fixedly connected to the surrounding tube; two annular fixing rings are fixed in the cylindrical tube part, the fixing rings have annular limiting grooves, the two ends of the rotating tube are respectively inserted into the limiting grooves of the two fixing rings, and a rotating bearing is connected between each end of the rotating tube and the corresponding fixing ring; the cylindrical tube part has a first opening and two arc-shaped through grooves connected to the first opening, each arc-shaped through groove has a slide plate unit fixedly installed, and the slide The plate unit has an arc-shaped slide groove; the rotating tube has a second opening, and two arc-shaped iron blocks are fixed to the rotating tube, and the two arc-shaped iron blocks correspond to the two slide groove plate units one by one, and each arc-shaped iron block is embedded in the corresponding slide groove plate unit; the surrounding tube includes two frustum-shaped end tubes connected to the cylindrical tube part and a cylindrical middle tube connecting the two end tubes; the lower sand pipe includes a lower material pipe, a lower material hopper connected to the lower material pipe, and a lower material pipe valve installed at the lower material pipe, and the lower material hopper is connected to the middle pipe; two installation pipes are connected to the middle pipe, and each installation pipe is connected to the middle pipe. An upper mounting platform and a lower mounting platform are fixedly installed at the pipe installation location, an upper electromagnet unit is installed at the upper mounting platform, and a lower electromagnet unit is installed at the lower mounting platform; a sand receiving plate is installed at the surrounding pipe, and the sand receiving plate has a plurality of sand discharge holes; the plurality of sand discharge holes are distributed in a rectangular array, and each column of sand discharge holes corresponds to an anti-backflow plate, and the anti-backflow plate is hinged to the lower surface of the sand receiving plate through an elastic reset hinge component, and when there is no external force, the anti-backflow plate blocks the corresponding column of sand discharge holes; the distribution direction of each column of sand discharge holes is perpendicular to the axial direction of the cylindrical pipe portion.

2. The pumped storage unit for natural water sources according to claim 1, characterized in that: The slide plate unit comprises two end arc plates and an arc surface connecting plate connecting the two end arc plates.

3. The pumped storage unit for natural water sources according to claim 2, characterized in that: The outer diameter of the arc-shaped iron block is equal to the inner diameter of the arc-surface connecting plate; and the two end surfaces of the arc-shaped iron block respectively abut against the two end arc-shaped plates of the corresponding chute plate unit.

4. The pumped storage unit for natural water sources according to claim 1, characterized in that: One end of the mounting pipe is welded and fixed to the middle pipe, and the other end is provided with a mounting flange.

5. The pumped storage unit for natural water sources according to claim 1, characterized in that: Both ends of the cylindrical tube portion are provided with connecting flanges.

6. The pumped storage unit for natural water sources according to claim 1, characterized in that: The ends of the two fixing rings away from the first opening both have chamfers.

7. The pumped storage unit for natural water sources according to claim 1, characterized in that: When the two upper electromagnet units are turned on and the two lower electromagnet units are turned off, the rotating tube can completely cover the first opening; when the two upper electromagnet units are turned off and the two lower electromagnet units are turned on, the first opening faces the second opening, and the first opening faces the sand receiving plate.

8. The pumped storage unit for natural water sources according to claim 1, characterized in that: The two installation pipes are connected by a plurality of connecting rods, and the plurality of connecting rods are distributed in a ring shape with equal intervals.

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