A pumped storage power station water replenishment system

Abstract

The utility model belongs to water supply and drainage technical field of water conservancy and hydropower engineering provides a pumped storage power station water supply system, the system includes sand trap, pump house, concrete round pipe culvert, high pool, sand trap is connected with pump house, and pump house, concrete round pipe culvert, high pool are connected in proper order through water supply line, concrete round pipe culvert is embedded in frozen soil layer below railway line, and one end of concrete round pipe culvert is communicated with drain valve inspection shaft, the bottom in concrete round pipe culvert is equipped with concrete pedestal, and concrete pedestal is equipped with water supply steel pipe on, the contact surface of concrete pedestal and water supply steel pipe is arc type, and is compatible with the circular arc surface of water supply steel pipe, the outside of water supply steel pipe is equipped with heat preservation material, the utility model discloses through the design of concrete round pipe culvert, effectively solved the technical problem that water supply system is under the railway line, ensured the reliability of pumped storage power station water supply, simultaneously does not influence the normal construction and operation of railway.

Description

Technical Field

[0001] This utility model belongs to the field of water supply and drainage technology in water conservancy and hydropower engineering, and specifically relates to a water replenishment system for a pumped storage power station. Background Technology

[0002] Pumped storage power stations, as important energy storage facilities, play a vital role in the power system, including peak shaving, frequency regulation, phase regulation, and emergency backup. The normal operation of a pumped storage power station requires a stable and reliable water supply system to meet the needs of temporary water use during construction, initial water storage, and water replenishment during operation.

[0003] During the construction of water replenishment systems for pumped storage power stations, situations often arise where the water replenishment route needs to cross important infrastructure, such as high-speed railway lines and important cultural relic protection areas. Traditional solutions typically involve rerouting the water replenishment route to bypass these sensitive areas. However, rerouting solutions often significantly increase the length of the water replenishment route, leading to a substantial increase in project investment, and may also be unable to achieve effective rerouting due to terrain limitations.

[0004] When there are unavoidable critical facilities between the water supply source and the power station's lower reservoir, designing a water supply system that meets the crossing requirements without adversely affecting existing facilities becomes a pressing technical problem in engineering construction. Current technologies lack mature water supply system solutions for such complex engineering conditions, especially when the system needs to pass under high-speed railways or other infrastructure with extremely high safety requirements. Ensuring the reliability of the water supply system and the safety of railway operations is a significant challenge for engineering technicians. Utility Model Content

[0005] This utility model aims to address the technical problems existing in the prior art by providing a water replenishment system for pumped storage power stations that can meet the requirements of passing under high-speed railway lines and important cultural relic protection areas.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: A water replenishment system for a pumped storage power station includes a sedimentation tank, a pump house, a concrete circular culvert, and an elevated water tank. The sedimentation tank is connected to the pump house, and the pump house, the concrete culvert, and the elevated water tank are connected in sequence through a water supply line. The concrete circular culvert is embedded in the frozen soil layer below the high-speed railway line, and one end of the concrete circular culvert is connected to the drainage valve inspection well.

[0007] Optionally, a concrete base is provided at the bottom of the concrete circular culvert, and a water supply steel pipe is provided on the concrete base.

[0008] Optionally, the contact surface between the concrete base and the water supply steel pipe is arc-shaped and adapted to the arc surface of the water supply steel pipe.

[0009] Optionally, the sum of the height of the lowest point of the contact surface between the concrete base and the water supply steel pipe and the diameter of the water supply steel pipe is less than 1 / 2 of the diameter of the concrete circular culvert.

[0010] Optionally, the water supply steel pipe is externally wrapped with thermal insulation material.

[0011] Optionally, the concrete circular culvert is pre-embedded between two adjacent bridge piers of the high-speed railway line.

[0012] Optionally, the concrete circular culvert has a length of not less than 50m and a diameter of not less than 1.5m, and the horizontal distance between the surface of the concrete circular culvert and the two bridge piers is 20-30m.

[0013] Optionally, one end of the concrete circular culvert is connected to the inspection well of the drain valve. When the steel pipe is being repaired, maintenance personnel enter the concrete circular culvert through the inspection well to carry out structural repairs.

[0014] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model can achieve the purpose of replenishing water for pumped storage power stations during the construction and operation periods by designing the water replenishment line, and solves the problems of passing under high-speed railway lines and crossing important cultural relics protection areas. It has broad guiding significance and promotion significance for the design of subsequent pumped storage power station water replenishment systems. (2) This utility model connects the water supply source to the lower reservoir of the power station, which meets the temporary water demand for construction, as well as the initial water storage and water supply needs of the power station during operation. The section passing under the high-speed railway will not affect the construction and operation of the high-speed railway, and there is no need to bypass the high-speed railway line and important cultural relics protection areas, thus reducing construction costs. Attached Figure Description

[0015] Figure 1 This is a schematic plan view of the water replenishment system for a pumped storage power station according to this utility model. Figure 2 This is a schematic diagram of the water supply pipe passing under the high-speed railway. Figure 3 This is a schematic diagram of the structure of the drain valve maintenance well; In the diagram, 1. Sedimentation basin; 2. Pumping station; 3. Water supply line; 4. Elevated water tank; 5. Concrete circular culvert; 6. Drain valve inspection well; 7. Drain valve; 8. Concrete base; 9. Water supply steel pipe; 10. Insulation material; 11. Bridge pier; 12. High-speed rail line; 13. Lower reservoir. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Combination Figures 1-3 As shown, this utility model embodiment provides a water replenishment system for a pumped storage power station, including a sedimentation tank 1, a pump house 2, a concrete circular pipe culvert 5, and an elevated water tank 4; The sedimentation tank 1 is connected to the pump house 2, and the pump house 2, the concrete circular pipe culvert 5, and the elevated water tank 4 are connected in sequence through the water supply line 3. The concrete circular culvert 5 is pre-embedded in the frozen soil layer below the high-speed railway line 12, and one end of the concrete circular culvert 5 is connected to the drainage valve inspection well 6. The inspection well is connected to one end of the circular culvert, and the water supply steel pipe 9 passes through the circular culvert. The inspection well is located on the water supply line 3. The high-speed railway bridge is perpendicular to the circular culvert, and the inspection well is located 25m outside the high-speed railway line 12 to minimize the impact on the high-speed railway.

[0018] Furthermore, a concrete base 8 is provided at the bottom of the concrete circular culvert 5, and a water supply steel pipe 9 is provided on the concrete base 8.

[0019] Furthermore, the contact surface between the concrete base 8 and the water supply steel pipe 9 is arc-shaped and matches the arc surface of the water supply steel pipe 9.

[0020] Furthermore, the sum of the height of the lowest point of the contact surface between the concrete base 8 and the water supply steel pipe 9 and the diameter of the water supply steel pipe 9 is less than 1 / 2 of the diameter of the concrete circular culvert 5.

[0021] Furthermore, the water supply steel pipe 9 is externally wrapped with thermal insulation material 10.

[0022] Furthermore, the concrete circular culvert 5 is pre-embedded between two adjacent piers 11 of the high-speed railway line 12.

[0023] Furthermore, the length of the concrete circular culvert 5 is not less than 50m, and the horizontal distance between the surface of the concrete circular culvert 5 and the two side piers 11 is 20-30m.

[0024] Furthermore, one end of the concrete circular culvert 5 is connected to the drain valve inspection well 6. During steel pipe maintenance, maintenance personnel enter the concrete circular culvert 5 through the inspection well to perform structural maintenance.

[0025] The working principle of the above-mentioned utility model is as follows: The water replenishment system works as follows: raw water first enters sedimentation tank 1 for pretreatment, where gravity sedimentation removes silt and suspended solids, ensuring that the water quality entering subsequent systems meets requirements. The treated water in sedimentation tank 1 is then transported through pipelines to pump station 2. Pumps in pump station 2 pressurize and lift the water, providing power for subsequent long-distance transport.

[0026] Pressurized clean water enters the concrete circular culvert 5 through water supply line 3. The concrete circular culvert 5 is a key component of the entire system, pre-embedded in the frozen soil layer beneath high-speed railway line 12, effectively solving the technical challenge of the water supply pipeline crossing line 12. The frozen soil layer possesses excellent stability and bearing capacity, ensuring the culvert maintains structural integrity under the load of high-speed trains. The concrete circular culvert 5 employs prefabricated assembly construction, minimizing interference with high-speed railway operations, while its concrete structure exhibits excellent durability and compressive strength.

[0027] A concrete base 8 is located at the bottom of the interior of the concrete circular culvert 5, providing a stable support platform for the water supply steel pipe 9. The contact surface between the concrete base 8 and the water supply steel pipe 9 is designed as an arc shape, perfectly matching the arc surface of the water supply steel pipe 9. This design not only increases the contact area and improves the support stability, but also effectively distributes the weight of the steel pipe and the load generated by the internal water pressure, avoiding stress concentration. By precisely controlling the sum of the lowest point of the contact surface between the concrete base 8 and the water supply steel pipe 9 and the diameter of the water supply steel pipe 9 to be less than 1 / 2 of the diameter of the concrete circular culvert 5, sufficient installation and maintenance space for the steel pipe is ensured within the circular culvert.

[0028] The water supply steel pipe 9 is externally wrapped with insulation material 10, which effectively prevents the water inside the pipe from freezing in extremely cold regions and ensures the normal operation of the system in low-temperature environments. The installation of insulation material 10 is of great significance for ensuring stable water supply to the pumped storage power station throughout the year, especially during winter operation, as it can prevent the pipe from freezing and cracking.

[0029] The arrangement of the concrete circular culvert 5 fully considers its relationship with the high-speed railway infrastructure. The culvert is pre-embedded between two adjacent piers 11 of the high-speed railway line 12, avoiding any impact on the foundations of the piers 11. The culvert is designed to be 50m long, meeting the safety distance requirements for crossing the high-speed railway line 12. Its diameter is 1.5m, providing ample space for the installation and maintenance of the DN600 water supply steel pipe 9. The surface of the culvert maintains a 25m safety distance from the piers 11 on both sides, ensuring that the safety of the high-speed railway bridge structure is not affected.

[0030] A drain valve inspection well 6 is located at one end of the concrete circular culvert 5, forming a connected structure with the culvert. The location of the inspection well is carefully planned, situated 25 meters outside the high-speed rail line 12, facilitating access for maintenance personnel while minimizing disruption to high-speed rail operations. When maintenance is required on the water supply pipe 9, personnel can enter the concrete circular culvert 5 through the drain valve inspection well 6 to conduct a comprehensive inspection and maintenance of the pipe connections, insulation material 10, and supporting structure. The drain valve 7 installed inside the inspection well allows for the drainage of accumulated water from the pipe before maintenance, ensuring safe operation.

[0031] After passing through the concrete circular culvert 5, the clean water continues to be transported along the water supply line 3 to the elevated water tank 4. The elevated water tank 4 serves a regulating and storage function, and can allocate water volume according to the water demand of the pumped storage power station. The water supply pipeline leading out from the elevated water tank 4 can be divided into two routes: one route supplies the temporary water demand during the construction period of the power station, with a pipe diameter of DN300; the other route continues to transport the water to the lower reservoir 13 to meet the initial water storage and water replenishment requirements during the operation period of the power station.

[0032] The entire water replenishment system achieves the following technical benefits: First, the design of the concrete circular culvert 5 successfully solved the engineering challenge of the water replenishment pipeline passing under the high-speed rail line 12, avoiding the increased costs associated with significant rerouting. Second, the system employs a combination of gravity flow and pumping to ensure the stability and reliability of the water supply. Third, the circular culvert structure, embedded in the frozen soil layer, is stable and will not adversely affect the construction and operation of the high-speed rail. Finally, the reasonable arrangement of inspection wells and insulation measures ensure the long-term safe operation and convenient maintenance of the system.

[0033] In one implementation case, the water replenishment system can also adapt to special environmental requirements such as traversing important cultural relic protection areas. In sections within these areas, the water replenishment steel pipe 9 is also buried below the permafrost layer, employing a similar pre-buried culvert structure. This satisfies both the requirements for cultural relic protection and ensures the fulfillment of the water replenishment function. This design provides a valuable technical reference for similar engineering projects and has promising prospects for widespread application. The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of this utility model application should be included within the protection scope of this utility model.

Claims

1. A water replenishment system for a pumped storage power station, characterized in that, Includes sedimentation tanks, pump rooms, concrete culverts, and elevated water tanks; The sedimentation tank is connected to the pump house, and the pump house, the concrete culvert, and the elevated water tank are connected in sequence through a water supply line. The concrete circular culvert is embedded in the frozen soil layer below the high-speed railway line, and one end of the concrete circular culvert is connected to the drainage valve inspection well.

2. The pumped storage power station water replenishment system according to claim 1, characterized in that, The bottom of the concrete circular culvert is provided with a concrete base, and a water supply steel pipe is provided on the concrete base.

3. The pumped storage power station water replenishment system according to claim 2, characterized in that, The contact surface between the concrete base and the water supply steel pipe is arc-shaped and matches the arc surface of the water supply steel pipe.

4. The pumped storage power station water replenishment system according to claim 3, characterized in that, The sum of the height of the lowest point of the contact surface between the concrete base and the water supply steel pipe and the diameter of the water supply steel pipe is less than 1 / 2 of the diameter of the concrete circular culvert.

5. The pumped storage power station water replenishment system according to claim 2, characterized in that, The water supply steel pipe is covered with thermal insulation material.

6. The pumped storage power station water replenishment system according to claim 1, characterized in that, The concrete circular culvert is pre-embedded between two adjacent bridge piers of the high-speed railway line.

7. The pumped storage power station water replenishment system according to claim 6, characterized in that, The concrete circular culvert has a length of not less than 50m and a diameter of not less than 1.5m. The horizontal distance between the surface of the concrete circular culvert and the two bridge piers is 20-30m.

8. The water replenishment system for a pumped storage power station according to claim 1, characterized in that, One end of the concrete circular culvert is connected to the inspection well of the drain valve. When the steel pipe is being repaired, maintenance personnel enter the concrete circular culvert through the inspection well to inspect the structure.

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