Anti-icing device for reservoir panel on pumped storage power station

Abstract

The utility model relates to an anti-icing device for a reservoir panel on a pumped storage power station, and belongs to the technical field of reservoir concrete panel protection in hydropower engineering. A first polyurea waterproof coating layer is at least arranged in an ice pulling prevention area on the outer surface of a reservoir concrete panel, a protective cover plate is flatly laid on the upper surface of the first polyurea waterproof coating layer, and the protective cover plate comprises a covering ice block internally provided with a plurality of steel bar gabions. Composite geotechnical cloth is fixedly laid on the bottom surface of the covering ice block, the composite geotechnical cloth and the covering ice block are frozen into a whole, a second polyurea waterproof coating layer is arranged on the bottom surface of the composite geotechnical cloth, and the second polyurea waterproof coating layer is attached to the first polyurea waterproof coating layer; a connecting piece extending out of the upper end of the ice block is fixedly arranged on the reinforced gabion, and the protective cover plate is fixedly arranged on the reservoir concrete panel through the matching of the connecting piece and the fixing piece. The device is simple and convenient to implement, and low in labor cost and energy consumption cost.

Description

Technical Field

[0001] The utility model relates to an anti-icing device for a reservoir panel on a pumped storage power station, belonging to the technical field of reservoir concrete panel protection in hydropower and water conservancy projects. Background Art

[0002] Pumped-storage power stations have become a hot spot for the development of clean energy in my country in recent years due to their mature technology, excellent economic efficiency, and large-scale energy storage development. Pumped-storage power stations use water as a medium for energy storage. During the low-peak period of the power grid load, the excess electricity pumps the water from the lower reservoir to the upper reservoir, converting the electricity into the potential energy of water; during the peak period of the power grid load, the water from the upper reservoir flows into the plant to generate electricity, alleviating the pressure of peak electricity consumption. Due to its own characteristics, pumped-storage power stations have a large height difference between the upper and lower reservoirs. The upper reservoir is often located in high-altitude and cold areas. In winter, the upper reservoir is prone to freezing, and an "ice cover" is easily formed in the reservoir. The concrete panel structure is easily damaged by freezing, and ice pull damage and frost heave damage occur. Among them, the de-icing measures for the "ice cover" in the reservoir are relatively complete, such as ice balls and icebreakers; but there are fewer anti-icing measures for the "concrete panel structure". The representative schemes currently available are as follows:

[0003] The patent document with the announcement number CN209292988U discloses an anti-icing device for the slope of a reservoir in an energy-storage power station. The anti-icing device for the slope of a reservoir in an energy-storage power station is a vehicle-mounted device, including a vehicle body, a generator and a winch are arranged on the vehicle body, the winch is connected to a moving vehicle plate, the moving vehicle plate is provided with rollers, a running mechanism is arranged above the moving vehicle plate, and the running mechanism is connected to a scraper. The anti-icing device for the slope of a reservoir in an energy-storage power station is connected to the moving vehicle plate through a winch, and the moving vehicle plate moves downward along the slope of the reservoir area of ​​the energy-storage power station under the action of its own gravity and the running mechanism, and at the same time, the scraper scrapes back and forth on the slope of the reservoir area to prevent ice from tearing the surface of the reservoir area.

[0004] Patent document with publication number CN116657566A discloses a deicing device for dam slope of pumped storage power station and deicing method thereof, the deicing device comprises a traveling mechanism, a telescopic mechanism is provided on one side of the traveling mechanism, one end of the telescopic mechanism is connected to the traveling mechanism through a connecting mechanism, and the other end is connected to the deicing mechanism, the deicing mechanism comprises a mounting seat, a motor is provided on the mounting seat, the output end of the motor is connected to a deicing blade disc, and a plurality of deicing blades are provided on the deicing blade disc. The deicing device deiced by the deicing blade disc prevented the slope from being damaged by freezing.

[0005] The patent document with the announcement number CN212248146U discloses a deicing device for the dam slope protection of a pumped storage power station, comprising a plane moving plate with a first universal wheel at the bottom arranged on the pedestrian walkway at the top of the slope protection, one side of the plane moving plate is connected to a slope moving plate with a second universal wheel at the bottom located on the upstream slope protection of the dam through a hinge, a control handle for controlling the plane moving plate to move along the pedestrian walkway is arranged on the plane moving plate, a rectangular slot is arranged through the middle of the slope moving plate, side slides are installed on both sides of the rectangular slot, a movable plug plate is inserted in the side slides, an electric telescopic rod is arranged on the slope moving plate, the electric telescopic rod pushes and pulls the movable plug plate to slide up and down along the upstream slope protection surface of the dam in the rectangular slot, a two-stage hydraulic rod is arranged on the bottom of the movable plug plate, a top pressure plate is arranged at the bottom of the two-stage hydraulic rod, and deicing cones are evenly arranged at the bottom of the top pressure plate. The deicing device deices by deicing cones.

[0006] Patent document with announcement number CN204356744U discloses a reservoir anti-icing device for a pumped-storage power station in a high-cold area, which is used to generate disturbed water flow to prevent ice from forming within a certain range of the reservoir, and includes: a slide rail, a submersible pump, a winch, and a water level monitoring device; wherein the slide rail is fixedly arranged on the surface of the reservoir basin; the submersible pump moves longitudinally along the slide groove on the slide rail, and a water pipe is arranged on the upper part of the submersible pump for generating disturbed water flow; the winch is connected to the submersible pump through a steel wire rope; the water level monitoring device is connected to the winch, which is used to monitor and control the winch according to the water level of the reservoir to drive the submersible pump to rise and fall with the water level.

[0007] It can be seen from the above patent documents that there are two main anti-icing design ideas at present: the first is to use de-icing equipment to remove ice in time to prevent the ice layer from continuing to thicken and causing greater ice damage; the second is to disturb the water flow and increase the flow of the water body to prevent it from freezing. The first method is "treating the symptoms but not the root cause" and requires more manpower and resources. Continuous de-icing in winter is very expensive. The second method also requires continuous operation of the equipment and uninterrupted disturbance of the water flow, which consumes extremely high energy. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide an anti-icing device for a reservoir panel of a pumped storage power station, which is easier to implement and can save energy consumption and labor costs.

[0009] In order to solve the above technical problems, the technical solution adopted by the utility model is: an anti-icing device for a reservoir panel on a pumped storage power station, comprising a reservoir concrete panel, the outer surface of the reservoir concrete panel has a power station operating water level amplitude variation zone, the outer surface of the reservoir concrete panel is provided with an anti-icing pull area, the upper end position of the anti-icing pull area is higher than the upper limit position of the power station operating water level amplitude variation zone, the lower end position of the anti-icing pull area is lower than the lower limit position of the power station operating water level amplitude variation zone, the outer surface of the reservoir concrete panel is provided with a first polyurea waterproof coating layer at least in the anti-icing pull area, and the first polyurea waterproof coating layer is provided in the first polyurea waterproof coating layer. A protective cover plate is laid flat on the upper surface of the coating layer, and the covering area of ​​the protective cover plate corresponds to the anti-ice pull-out area. The protective cover plate includes a covering ice block with a plurality of reinforced gabions inside, and a composite geotextile is laid flat and fixed on the bottom surface of the covering ice block. The composite geotextile and the covering ice block are frozen into a whole, and a second polyurea waterproof coating layer is provided on the bottom surface of the composite geotextile, and the second polyurea waterproof coating layer is bonded to the first polyurea waterproof coating layer; a connector extending to the outside of the upper end of the covering ice block is fixedly provided on the reinforced gabion, and the protective cover plate is fixedly provided on the concrete panel of the reservoir through the connector and the fixing member.

[0010] A further preferred solution is that an oil film layer is provided between the second polyurea waterproof coating layer and the first polyurea waterproof coating layer.

[0011] A further preferred solution is that the fixing member includes a cable and a fixing bracket, the fixing bracket is pre-embedded and fixed on the concrete panel of the reservoir, the lower end of the cable is connected to the lifting ring on the connecting member, and the upper end of the cable is connected to the fixing bracket.

[0012] A further preferred solution is that a dense mesh covering all sides of the steel gabion is fixedly provided on the inner or outer side of the steel gabion.

[0013] A further preferred solution is that a plurality of protective cover plates are continuously arranged along the length direction of the reservoir concrete panel, and two adjacent protective cover plates are frozen into a whole by an ice structure.

[0014] A further preferred solution is that positioning holes are respectively provided at the butt end faces between two adjacent protective cover plates, the axial direction of the positioning holes is arranged along the length direction of the reservoir concrete panel, and the two adjacent protective cover plates are positioned and connected by the positioning holes and positioning rods.

[0015] The beneficial effects of the utility model are as follows: by coating the first polyurea waterproof coating layer on the concrete panel of the reservoir, the frost heave damage of the water-stopping structure system can be avoided as much as possible; by making a protective cover plate, the reservoir water and the reservoir concrete panel of the frozen layer are basically isolated, and the protective cover plate is attached to the concrete panel of the reservoir by its own weight to drain the reservoir water, which can avoid the icing of the panel surface and the ice pull damage caused by the gradual thickening of the ice layer as much as possible. After the construction of the utility model is completed, there is no need for the operation of energy-consuming equipment such as motors, and no manpower is required to operate the de-icing, so the manpower cost and energy consumption cost are both low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the elevation arrangement of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure of the middle anti-icing area.

[0018] Marked in the figure are: reservoir concrete panel 1, power station operating water level fluctuation area 2, first polyurea waterproof coating layer 3, protective cover plate 4, covering ice 41, composite geotextile 42, second polyurea waterproof coating layer 43, positioning hole 44, cable 5, and fixing bracket 6. DETAILED DESCRIPTION

[0019] The utility model will be further described below in conjunction with the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, the utility model includes a reservoir concrete panel 1, the outer surface of the reservoir concrete panel 1 has a power station operating water level amplitude variation zone 2, the outer surface of the reservoir concrete panel 1 is provided with an anti-icing and pulling area, the upper end position of the anti-icing and pulling area is higher than the upper limit position of the power station operating water level amplitude variation zone 2, and the lower end position of the anti-icing and pulling area is lower than the lower limit position of the power station operating water level amplitude variation zone 2, the outer surface of the reservoir concrete panel 1 is provided with a first polyurea waterproof coating layer 3 at least in the anti-icing and pulling area, and a protective cover plate 4 is laid flat on the upper surface of the first polyurea waterproof coating layer 3, and the covering area of ​​the protective cover plate 4 is opposite to the anti-icing and pulling area Correspondingly, the protective cover plate 4 includes a covering ice block 41 with a plurality of reinforced gabions inside (the plurality of reinforced gabions refers to one or more reinforced gabions), the bottom surface of the covering ice block 41 is flatly paved with a composite geotextile 42, the composite geotextile 42 and the covering ice block 41 are frozen into a whole, the bottom surface of the composite geotextile 42 is provided with a second polyurea waterproof coating layer 43, the second polyurea waterproof coating layer 43 is in contact with the first polyurea waterproof coating layer 3; a connecting piece extending to the outside of the upper end of the covering ice block 41 is fixedly provided on the reinforced gabion, and the protective cover plate 4 is fixedly provided on the reservoir concrete panel 1 through the connecting piece and the fixing piece.

[0021] During specific implementation, the parameter values ​​of the upper and lower positions of the anti-ice pulling area can be determined according to the actual working conditions, mainly considering the height of the surge in the reservoir and the maximum freezing depth in the area. The vertical spacing between the upper position of the anti-ice pulling area and the upper limit position of the power station operating water level amplitude variation zone 2 can generally be determined according to the height of the surge in the reservoir, generally not exceeding 1.5m. The vertical spacing between the lower end position of the anti-ice pulling area and the lower limit position of the power station operating water level amplitude variation zone 2 can generally be determined according to the maximum freezing depth in the area, generally about 1m. During specific construction, water can be discharged from the upper reservoir to the lower reservoir so that the water level is lower than the lower end position of the anti-ice pulling area, thereby meeting the dry land conditions required for construction. In some embodiments, the upper end position of the protective cover plate 4 and the upper end position of the first polyurea waterproof coating layer 3 can be designed at the same elevation position as the upper end position of the anti-ice pulling area, and the lower end position of the protective cover plate 4 and the lower end position of the first polyurea waterproof coating layer 3 can be designed at the same elevation position as the lower end position of the anti-ice pulling area. However, in order to facilitate the installation of the protective cover plate 4, in the preferred embodiment, the first polyurea waterproof coating layer 3 can usually cover a larger area. The first polyurea waterproof coating layer 3 is usually formed by spraying polyurea waterproof coating on the outer surface of the reservoir concrete panel 1. The polyurea waterproof coating is an existing material with good waterproof performance. After the construction is completed, a waterproof layer is formed to prevent water from flowing into the water-stopping structure system of the panel joint as much as possible, resulting in frost heave damage.

[0022] The composite geotextile 42 is located at the bottom of the covered ice block 41. The composite geotextile 42 has strong tear resistance and is waterproof. After freezing, it can fit tightly with the covered ice block 41. The bottom of the composite geotextile 42 is sprayed with polyurea waterproof coating to form a second polyurea waterproof coating layer 43, which plays a role of wear resistance and waterproofness. At the same time, it is used to increase the flatness of the bottom of the covered ice block 41, so that the protective cover plate 4 as a whole can fit tightly with the first polyurea waterproof coating layer 3. The protective cover plate 4 can basically isolate the reservoir water and the reservoir concrete panel 1 in the frozen layer. The protective cover plate 4 relies on its own weight to fit on the reservoir concrete panel 1, drain the reservoir water, and try to avoid ice formation on the panel surface and ice pull damage caused by the gradual thickening of the ice layer.

[0023] Preferably, an oil film layer is provided between the second polyurea waterproof coating layer 43 and the first polyurea waterproof coating layer 3. The oil film layer can reduce the disturbance of the protective cover plate 4 to the reservoir concrete panel 1. The oil film layer can be formed by pre-coating the lubricating oil on the bottom surface of the second polyurea waterproof coating layer 43 or the lubricating oil on the upper surface of the first polyurea waterproof coating layer 3 during the installation of the protective cover plate 4.

[0024] To facilitate construction, the fixing parts include a cable 5 and a fixing bracket 6. The fixing bracket 6 is pre-buried and fixed on the reservoir concrete panel 1. The lower end of the cable 5 is connected to the lifting ring on the connecting part, and the upper end of the cable 5 is connected to the fixing bracket 6.

[0025] In order to facilitate construction and reduce the requirements for the particle size of the block stones, a dense mesh covering all sides of the reinforced gabion is fixedly set on the inner or outer side of the reinforced gabion. The reinforced gabion is generally rectangular, and its six sides are all provided with a dense mesh. After the dense mesh is set, the inner filler of the reinforced gabion can be ordinary pebbles and gravels, so that local materials can be used. When making the protective cover plate 4, the reinforced gabion, pebbles and gravels, reservoir water, and composite geotextile 42 are generally frozen into an overall structure of a rectangular parallelepiped, and then a polyurea waterproof coating is sprayed on the bottom of the composite geotextile 42 to form a second polyurea waterproof coating layer 43. The reinforced gabion mainly acts as a counterweight to prevent the protective cover plate 4 from floating on the water.

[0026] In specific implementation, multiple protective cover plates 4 are continuously arranged along the length direction of the reservoir concrete panel 1. To maintain its integrity, preferably, the space between two adjacent protective cover plates 4 is frozen into a whole by an ice structure. In specific construction, after multiple protective cover plates 4 are positioned and placed, reservoir water can be dripped into the joints between two protective cover plates 4 in small amounts for multiple times to freeze and seal.

[0027] In order to further improve the integrity of the structure, positioning holes 44 are respectively provided at the butt end faces between two adjacent protective cover plates 4. The axial direction of the positioning holes 44 is arranged along the length direction of the reservoir concrete panel 1. The two adjacent protective cover plates 4 are positioned and connected by the positioning holes 44 in cooperation with the positioning rods. The positioning holes can be obtained by the embedded core in the ice-making mold, or the connecting sleeve can be directly preset in the protective cover plate 4. One or more positioning holes can be provided at each end face. The positioning holes can be blind hole structures or through hole structures that penetrate the two side end faces of the protective cover plate 4. When the through hole structure is adopted, a group of positioning rods can also be used to simultaneously connect multiple protective cover plates 4 in series. The positioning rods can generally be reinforced concrete prefabricated columns.

[0028] The utility model is applied to the upper reservoir of a pumped storage power station in high altitude and cold regions, where the surrounding environment temperature is below 0°C for a long time. The specific implementation generally includes the following steps:

[0029] A. First, fill the template box with reinforced gabions, reservoir water, and composite geotextiles according to the designed structure to produce covered ice blocks with composite geotextiles on the bottom. Among them, the inner side of the steel bars of the reinforced gabions is a dense mesh to prevent pebbles and gravels from sliding through the gaps of the gabions and reducing the quality of the gabions; the composite geotextiles are arranged at the bottom of the reinforced gabions; the top of the covered ice blocks is equipped with a connector with a lifting ring, which is welded to the reinforced gabions.

[0030] B. After the covering ice is formed, spray a layer of polyurea waterproof coating on the bottom of the composite geotextile, level it, and after curing, brush a layer of lubricating oil on the bottom of the coating.

[0031] C. Repeat steps A and B above to make multiple covered ice cubes.

[0032] D. After the reservoir of the pumped storage power station is released to generate electricity, the water level is lower than the maximum freezing depth in the area. A layer of polyurea waterproof coating is sprayed on the concrete panel of the reservoir with a coating thickness of 3mm to 5mm. The lower limit of the coating spraying area is 0.5m below the maximum freezing depth in the area, and the upper limit is the maximum height of the surge.

[0033] E. Lay slide rails along the slope on the concrete panel of the reservoir.

[0034] F. Use a cable, one end of which is connected to the lifting ring in the ice, and the other end is tied to the fixed bracket preset on the concrete panel of the reservoir. Use a winch to lock the cable near the fixed bracket to control the length of the cable.

[0035] G. Use a crane to place the covering ice on the slide.

[0036] H. Use a winch to slowly release the cable. Under the action of gravity, the covering ice will slowly slide along the concrete panel to the assembly position.

[0037] I. Use reinforced concrete prefabricated columns to penetrate the positioning holes covered with ice.

[0038] J. Repeat steps F to I to form multiple covered ice blocks that are positioned and connected, and cover the assembling gaps between the ice blocks. They are connected by repeatedly dripping small amounts of reservoir water to condense into ice to form an "ice blanket".

[0039] K. Finally, when the temperature rises and is higher than 0°C, the "ice blanket" melts and the utility model needs to be dismantled, the reinforced concrete prefabricated columns are pulled out and the reinforced gabion is slowly lifted out with a winch.

Claims

1. An anti-icing device for a reservoir panel on a pumped storage power station, comprising a reservoir concrete panel (1), the outer surface of the reservoir concrete panel (1) having a power station operating water level amplitude area (2), characterized in that: The outer surface of the reservoir concrete panel (1) is provided with an anti-ice pull area, the upper end position of the anti-ice pull area is higher than the upper limit position of the power station operating water level fluctuation area (2), and the lower end position of the anti-ice pull area is lower than the lower limit position of the power station operating water level fluctuation area (2). The outer surface of the reservoir concrete panel (1) is provided with a first polyurea waterproof coating layer (3) at least in the anti-ice pull area, and a protective cover plate (4) is laid flat on the upper surface of the first polyurea waterproof coating layer (3), the covering area of ​​the protective cover plate (4) corresponds to the anti-ice pull area, and the protective cover plate (4) includes a plurality of The covered ice blocks (41) of the dry reinforced gabion are flatly laid and fixedly provided with a composite geotextile (42) on the bottom surface of the covered ice blocks (41), the composite geotextile (42) and the covered ice blocks (41) are frozen into a whole, the bottom surface of the composite geotextile (42) is provided with a second polyurea waterproof coating layer (43), and the second polyurea waterproof coating layer (43) is in contact with the first polyurea waterproof coating layer (3); a connecting piece extending to the outside of the upper end of the covered ice blocks (41) is fixedly provided on the reinforced gabion, and the protective cover plate (4) is fixedly provided on the reservoir concrete panel (1) through the connecting piece and the fixing piece.

2. The anti-icing device for the upper reservoir panel of a pumped storage power station according to claim 1, characterized in that: An oil film layer is provided between the second polyurea waterproof coating layer (43) and the first polyurea waterproof coating layer (3).

3. The anti-icing device for the upper reservoir panel of a pumped storage power station according to claim 1, characterized in that: The fixing part comprises a cable (5) and a fixing bracket (6); the fixing bracket (6) is pre-buried and fixed on the reservoir concrete panel (1); the lower end of the cable (5) is connected to a lifting ring on the connecting part; and the upper end of the cable (5) is connected to the fixing bracket (6).

4. The anti-icing device for the upper reservoir panel of a pumped storage power station according to claim 1, characterized in that: A dense mesh covering all sides of the reinforced gabion is fixedly installed on the inner or outer side of the reinforced gabion.

5. The anti-icing device for the upper reservoir panel of a pumped storage power station according to any one of claims 1 to 4, characterized in that: A plurality of protective cover plates (4) are continuously arranged along the length direction of the reservoir concrete panel (1), and two adjacent protective cover plates (4) are frozen into a whole by an ice structure.

6. The anti-icing device for the upper reservoir panel of a pumped storage power station according to claim 5, characterized in that: Positioning holes (44) are respectively provided at the butt end surfaces between two adjacent protective cover plates (4), and the axial direction of the positioning holes (44) is arranged along the length direction of the reservoir concrete panel (1). The two adjacent protective cover plates (4) are positioned and connected via the positioning holes (44) and the positioning rods.

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