Intelligent water filling and draining system and method applied to high-water-head pumping and storing diversion tunnel

Abstract

The invention provides an intelligent water filling and draining system and method applied to a high-water-head pumping and storing diversion tunnel. The intelligent water filling and draining system comprises a water filling pipeline and a water draining pipeline which are communicated with a diversion lower adit; a water inlet of the water filling pipeline is connected with the draft tube, and a water outlet of the water filling pipeline is connected with the upstream side of a water inlet valve of the diversion lower adit; a water inlet of the drainage pipeline is connected with the upstream side of a water inlet valve of the diversion lower adit, and a water outlet of the drainage pipeline is connected with the tail water surge shaft; the drainage system further comprises a drainage gallery communicated with the diversion middle adit, and a water outlet of the drainage gallery is connected with the lower reservoir. Intelligent water filling and discharging of the diversion tunnel can be achieved, and meanwhile vibration to a unit water discharging needle valve during water filling and discharging can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water transmission and power generation, and more specifically, to an intelligent filling and drainage system and method for high-head pumped-storage water diversion tunnels. Background Art

[0002] With the large-scale development of my country's pumped storage industry, more and more pumped storage power stations have entered the infrastructure stage. The water diversion tunnel in the pumped storage is subjected to high-pressure water flow, and the structural strength and construction are facing important challenges. Therefore, in order to ensure safety, it is necessary to conduct filling and drainage tests on the water diversion tunnel after its construction is completed.

[0003] Chinese patent CN202223057444.8 proposes a drainage device for a water diversion tunnel, including a drainage mechanism and a telescopic support rod used in conjunction with the drainage mechanism. The drainage mechanism includes a V-shaped water collecting plate, the bottom of the V-shaped water collecting plate is an arc edge that fits the inner wall of the water diversion tunnel, a water guide pipe is arranged in the middle of the bottom of the V-shaped water collecting plate, a water guide hose is arranged at the end of the water guide pipe, and a limited pull rope is arranged between the drainage mechanism and the telescopic rod to drain water. The filling and drainage scheme introduced in the paper "Filling and Drainage Test of No. 1 Water Diversion Tunnel of Xianyou Pumped Storage Power Station" is all manual filling and drainage. At the same time, since the water diversion tunnel is completely drained through the unit needle valve, the needle valve is under great pressure and will vibrate violently when the opening is small, posing a safety hazard.

[0004] In summary, the country is in urgent need of an intelligent filling and drainage system and method for high-head pumped-storage water diversion tunnels. Summary of the invention

[0005] The first purpose of the embodiment of the present invention is to provide an intelligent filling and drainage system for a high-head pumped storage water diversion tunnel, which can realize intelligent filling and drainage of the water diversion tunnel and effectively reduce the vibration of the unit's drainage needle valve during filling and drainage.

[0006] An embodiment of the present invention provides an intelligent filling and drainage system for a high-head pumped-storage water diversion tunnel, comprising: a filling pipeline and a drainage pipeline connected to a water diversion lower flat tunnel; the water inlet of the filling pipeline is connected to the tailwater pipe, and the water outlet of the filling pipeline is connected to the upstream side of the water inlet valve of the water diversion lower flat tunnel; the water inlet of the drainage pipeline is connected to the upstream side of the water inlet valve of the water diversion lower flat tunnel, and the water outlet of the drainage pipeline is connected to the tailwater pressure regulating well; the drainage system also includes a drainage gallery connected to the water diversion middle flat tunnel, and the water outlet of the drainage gallery is connected to the lower reservoir.

[0007] In one embodiment, a first manual ball valve, an electric gate valve, a water filter, a first manual gate valve, a water diversion tunnel filling pump group, a first electric ball valve, a second manual gate valve, and a second electric ball valve are arranged in sequence along the water flow direction on the water filling pipeline.

[0008] In one embodiment, a second electric ball valve, a second manual gate valve, a needle valve, a second manual ball valve, a maintenance drainage pump group, and a third manual gate valve are sequentially arranged on the drainage pipeline along the water flow direction.

[0009] In one embodiment, the water diversion tunnel filling pump group includes a first water filling branch and a second water filling branch arranged in parallel; a water filling pump water inlet electric valve, a first centrifugal water pump, a water filling pump outlet check valve, a water filling pump outlet flow regulating valve, and a water filling pump outlet electric valve are arranged in sequence along the water flow direction on the first water filling branch; a water filling pressure sensor group is arranged in the water diversion tunnel filling pump group; and a water diversion tunnel filling pump bypass valve is arranged on the second water filling branch.

[0010] In one embodiment, the water filling pressure sensor group includes a first sensor and a fourth sensor arranged at both ends of the first water filling branch; the water filling pressure sensor group also includes a second sensor located at the front end of the electric valve at the water outlet of the water filling pump and a third sensor located at the front end of the flow regulating valve at the outlet of the water filling pump.

[0011] In one embodiment, the maintenance drainage pump group includes a maintenance drainage main pipe and a first drainage branch and a second drainage branch arranged in parallel, and a drainage pressure sensor group is arranged in the maintenance drainage pump group; the drainage pump inlet electric valve, the second centrifugal water pump, the drainage pump outlet check valve, and the drainage pump outlet electric gate valve are arranged in sequence along the water flow direction on the first drainage branch; the maintenance drainage pump bypass valve is arranged on the second drainage branch.

[0012] In one embodiment, the drainage pressure sensor group includes a fifth sensor located at the front end of the drainage pump inlet electric valve on the first drainage branch, a sixth sensor at the end of the drainage main pipe for maintenance, and a seventh sensor located at the rear end of the drainage pump outlet electric gate valve on the first drainage branch.

[0013] In one embodiment, a plug is provided at the drainage corridor, and a drainage pipe is connected to the outside at the plug, the water outlet of the drainage pipe is connected to the lower reservoir, and a ball valve, a flow regulating valve and an energy dissipation plate are arranged in sequence on the drainage pipe along the water flow direction.

[0014] In one embodiment, an energy dissipation pool is arranged at the outlet of the drainage pipe, one side of the energy dissipation pool is connected to the construction branch tunnel drainage ditch, holes are opened on the top and bottom of the side wall of the energy dissipation pool connected to the construction branch tunnel drainage ditch, and the outlet of the construction branch tunnel drainage ditch is connected to the lower reservoir.

[0015] The present invention also provides an intelligent filling and drainage method for a high-head pumped-storage water diversion tunnel, using any of the above-mentioned intelligent filling and drainage systems for a high-head pumped-storage water diversion tunnel:

[0016] (1) When filling with water:

[0017] S1: Open the bypass valve of the water diversion tunnel charging pump, the first electric ball valve and the second electric ball valve;

[0018] The water pump group of the water diversion tunnel is pressurized forward and backward according to the following water flow path: water inlet of tailwater pipe - first manual ball valve - electric gate valve - water filter - first manual gate valve - bypass valve of water diversion tunnel water filling pump - first electric ball valve - second manual gate valve - second electric ball valve - water outlet on the upstream side of water inlet valve;

[0019] At the same time, the first sensor and the fourth sensor detect the pressure of the water filling pump group in the water diversion tunnel;

[0020] S2: When the pressures of the first sensor and the fourth sensor are equal, the pressure equalization is completed, the bypass valve of the water diversion tunnel filling pump on the second water filling branch is closed, and the working element on the first water filling branch of the water diversion tunnel filling pump group is automatically started;

[0021] Fill water according to the following water flow path: water inlet of tailwater pipe - first manual ball valve - electric gate valve - water filter - first manual gate valve - electric valve at water inlet of water filling pump - first centrifugal water pump - check valve at water filling pump outlet - flow regulating valve at water filling pump outlet - electric valve at water filling pump outlet - first electric ball valve - second manual gate valve - second electric ball valve - water outlet at upstream side of water inlet valve;

[0022] At the same time, the third sensor controls the opening of the flow regulating valve at the outlet of the water filling pump, and the second sensor controls the opening of the electric valve at the outlet of the water filling pump;

[0023] (2) When draining:

[0024] S1: First, drainage is carried out through the drainage gallery above the horizontal tunnel in the diversion tunnel;

[0025] S2: The water is discharged through the drainage pipe below the horizontal tunnel in the diversion tunnel;

[0026] The maintenance drainage pump group is pressure-leveled according to the following water flow path: water inlet on the upstream side of the water inlet valve - the second electric ball valve - the second manual gate valve - the needle valve - the second manual ball valve - the maintenance drainage pump bypass valve - the third manual gate valve - the tailwater pressure regulating well water outlet;

[0027] At the same time, the fifth sensor and the sixth sensor detect the pressure of the maintenance drainage pump group;

[0028] S3: When the pressures of the fifth sensor and the sixth sensor are equal, the pressure equalization is completed, and the working elements on the first drainage branch of the drainage pump group are automatically started for inspection;

[0029] Drainage is carried out according to the following water flow path: water inlet on the upstream side of the inlet valve - the second electric ball valve - the second manual gate valve - the needle valve - the second manual ball valve - the electric valve at the water inlet of the drainage pump - the second centrifugal water pump - the check valve at the water outlet of the drainage pump - the electric gate valve at the water outlet of the drainage pump - the third manual gate valve - water outlet from the tailwater pressure regulating well.

[0030] The beneficial effects of the intelligent filling and drainage system and method for high-head pumped-storage water diversion tunnel provided by the embodiments of the present invention are:

[0031] 1. The present invention can provide a safe and reliable filling and drainage solution for high-head pumped-storage water diversion tunnels.

[0032] 2. The present invention connects the drainage pipe and the energy dissipation pool outward at the drainage gallery at the middle level tunnel of the water diversion tunnel to ensure the segmented drainage of the high-head water diversion tunnel, greatly reduces the pressure on the needle valve in the plant, and maintains the stability of the unit.

[0033] 3. The present invention can realize automatic filling and drainage of the upper reservoir through linkage with the electric valve through the water level signal, thus solving the shortcoming of unstable manual adjustment of the valve after the water filling pump during water filling in previous projects.

[0034] 4. The present invention arranges segmented drainage above and below the horizontal tunnel in the water diversion tunnel, which can more effectively control the drainage rate and ensure that the water diversion tunnel will not be emptied and cause danger due to excessive drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 It is a diagram of the filling and drainage system of the present invention.

[0037] Figure 2 It is a pivotal layout diagram of the water diversion tunnel of the present invention.

[0038] Figure 3 It is a layout diagram of the drainage gallery above the flat tunnel in the present invention.

[0039] Among them, the reference numerals in the figure are:

[0040] 1. Water diversion lower horizontal tunnel; 2. Water filling pipeline; 3. Drainage pipeline; 4. Water inlet valve; 5. Tailwater surge tank; 6. Drainage gallery; 7. Lower reservoir; 8. Water diversion horizontal tunnel; 9. Drain valve; 10. Tailwater pipe; 11. Trash rack;

[0041] 21. First manual ball valve; 22. Electric gate valve; 23. Water filter; 24. First manual gate valve; 25. First electric ball valve; 26. Second manual gate valve; 27. Second electric ball valve; 28. Water diversion tunnel filling pump group;

[0042] 281, first water filling branch; 282, second water filling branch; 283, electric valve at the water inlet of the water filling pump; 284, first centrifugal water pump; 285, check valve at the outlet of the water filling pump; 286, flow regulating valve at the outlet of the water filling pump; 287, electric valve at the outlet of the water filling pump; 288, bypass valve of the water filling pump in the water diversion tunnel;

[0043] 31. Needle valve; 32. Second manual ball valve; 33. Maintenance drainage pump set; 34. Third manual gate valve;

[0044] 351, first drainage branch; 352, second drainage branch; 353, drainage pump water inlet electric valve; 354, second centrifugal water pump; 355, drainage pump water outlet check valve; 356, drainage pump water outlet electric gate valve; 357, drainage pump bypass valve for maintenance;

[0045] 41. First sensor; 42. Second sensor; 43. Third sensor; 44. Fourth sensor; 45. Fifth sensor; 46. Sixth sensor; 47. Seventh sensor;

[0046] 61. Plug; 62. Drain pipe; 63. Ball valve; 64. Flow regulating valve; 65. Energy dissipation sheet; 66. Energy dissipation pool; 67. Construction branch tunnel drainage ditch; 68. Hole. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0049] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] Please also read Figure 1 , Figure 2 , Figure 3 Now, an intelligent filling and drainage system and method for a high-head pumped-storage water diversion tunnel provided by an embodiment of the present invention is described.

[0052] An intelligent filling and drainage system for a high-head pumped-storage water diversion tunnel comprises: a filling pipeline 2 and a drainage pipeline 3 connected to a water diversion lower adit 1; the water inlet of the filling pipeline 2 is connected to a tailwater pipe 10, the filling pipeline 2 takes water through the tailwater pipe 10 when the system is filled with water, the water outlet of the filling pipeline 2 is connected to the upstream side of an inlet valve 4 of the water diversion lower adit 1, and a trash rack 11 is arranged at the water inlet of the filling pipeline 2; the water inlet of the drainage pipeline 3 is connected to the upstream side of an inlet valve 4 of the water diversion lower adit 1, and the water outlet of the drainage pipeline 3 is connected to a tailwater surge tank 5; the drainage system further comprises a drainage gallery 6 connected to a water diversion middle adit 8, and the water outlet of the drainage gallery 6 is connected to a lower reservoir 7.

[0053] The water filling pipeline 2 is arranged in sequence along the water flow direction with a first manual ball valve 21, an electric gate valve 22, a water filter 23, a first manual gate valve 24, a water diversion tunnel filling pump group 28, a first electric ball valve 25, a second manual gate valve 26, and a second electric ball valve 27.

[0054] The drainage pipeline 3 is sequentially arranged along the water flow direction with a second electric ball valve 27 , a second manual gate valve 26 , a needle valve 31 , a second manual ball valve 32 , a maintenance drainage pump set 33 , and a third manual gate valve 34 .

[0055] The water diversion tunnel filling pump group 28 includes a first filling branch 281 and a second filling branch 282 arranged in parallel; a filling pump water inlet electric valve 283, a first centrifugal water pump 284, a filling pump outlet check valve 285, a filling pump outlet flow regulating valve 286, and a filling pump water outlet electric valve 287 are arranged in sequence along the water flow direction on the first filling branch 281; a filling pressure sensor group is arranged in the water diversion tunnel filling pump group 28; and a water diversion tunnel filling pump bypass valve 288 is arranged on the second filling branch 282.

[0056] The water filling pressure sensor group includes a first sensor 41 and a fourth sensor 44 arranged at both ends of the first water filling branch 281; the water filling pressure sensor group also includes a second sensor 42 located at the front end of the electric valve 287 at the water outlet of the water filling pump and a third sensor 43 at the front end of the water filling pump outlet flow regulating valve 286.

[0057] The maintenance drainage pump group 33 includes a maintenance drainage main pipe and a first drainage branch 351 and a second drainage branch 352 arranged in parallel; the drainage pump water inlet electric valve 353, the second centrifugal water pump 354, the drainage pump water outlet check valve 355, and the drainage pump water outlet electric gate valve 356 are arranged in sequence along the water flow direction on the first drainage branch 351; the maintenance drainage pump bypass valve 357 is arranged on the second drainage branch 352.

[0058] The drainage pressure sensor group includes a fifth sensor 45 disposed at the front end of the drainage pump water inlet electric valve 353 on the first drainage branch 351, a sixth sensor 46 at the end of the maintenance drainage main pipe, and a seventh sensor 47 at the rear end of the drainage pump water outlet electric gate valve 356 on the first drainage branch 351. Specifically, the fifth sensor 45 and the sixth sensor 46 can monitor the pressure before and after the maintenance drainage pump group 33, and control the opening and closing of the maintenance drainage pump bypass valve 357 and the drainage pump water inlet electric valve 353; at the same time, the seventh sensor 47 can control the opening and closing of the drainage pump water outlet electric gate valve 356, and the fifth pressure sensor 45 can control the opening and closing of the charging pump water outlet electric valve 287.

[0059] A plug 61 is provided at the drainage gallery 6, and a drainage pipe 62 is connected to the outside at the plug 61. The outlet of the drainage pipe 62 is connected to the lower reservoir 7. A ball valve 63, a flow regulating valve 64 and an energy dissipation sheet 65 are arranged in sequence along the water flow direction on the drainage pipe 62. The flow regulating valve 64 can regulate the flow and reduce the pressure according to the water level of the water diversion tunnel measured by the fifth sensor 45 in the pipeline to ensure that the outlet water pressure is less than 0.3MPa.

[0060] The drainage pipe 62 is provided with an energy dissipation pool 66 at the outlet, and one side of the energy dissipation pool 66 is connected to a construction branch hole drainage ditch 67. The energy dissipation pool 66 has holes 68 at the top and bottom of the side wall connected to the construction branch hole drainage ditch 67. The holes 68 can ensure the entry of gas and the discharge of water from the energy dissipation pool 66. The outlet of the construction branch hole drainage ditch 67 is connected to the lower reservoir 7.

[0061] The present invention also provides an intelligent filling and drainage method for a high-head pumped-storage water diversion tunnel, characterized in that it comprises any of the above-mentioned intelligent filling and drainage systems for a high-head pumped-storage water diversion tunnel:

[0062] (1) When filling with water:

[0063] S1: First, the water diversion tunnel filling pump group 28 is pressurized forward and backward, and after receiving the water filling signal, the water diversion tunnel filling pump bypass valve 288, the first electric ball valve 25 and the second electric ball valve 27 on the second water filling branch 282 are opened;

[0064] The water diversion tunnel filling pump group 28 is pressurized forward and backward according to the following water flow path: water inlet of tailwater pipe 10 - first manual ball valve 21 - electric gate valve 22 - water filter 23 - first manual gate valve 24 - bypass valve 288 of water diversion tunnel filling pump - first electric ball valve 25 - second manual gate valve 26 - second electric ball valve 27 - water outlet on the upstream side of water inlet valve 4;

[0065] At the same time, the first sensor 41 and the fourth sensor 44 detect the pressure of the water diversion tunnel filling pump group 28;

[0066] S2: When the pressures of the first sensor 41 and the fourth sensor 44 are equal, the pressure equalization is completed, the bypass valve 288 of the water diversion tunnel filling pump on the second water filling branch 282 is closed, and the working element on the first water filling branch 281 of the water diversion tunnel filling pump group 28 is automatically started;

[0067] Fill water according to the following water flow path: water inlet of tailwater pipe 10 - first manual ball valve 21 - electric gate valve 22 - water filter 23 - first manual gate valve 24 - electric valve 283 at water inlet of water filling pump - first centrifugal water pump 284 - check valve 285 at water filling pump outlet - flow regulating valve 286 at water filling pump outlet - electric valve 287 at water filling pump outlet - first electric ball valve 25 - second manual gate valve 26 - second electric ball valve 27 - water outlet at upstream side of water inlet valve 4;

[0068] At the same time, the third sensor 43 controls the opening of the outlet regulating valve 286 of the water filling pump, and the second sensor 42 controls the opening of the outlet electric valve 287 of the water filling pump. The outlet electric valve 287 of the water filling pump is opened first, and the opening of the outlet regulating valve 286 of the water filling pump is finely adjusted to ensure that the front and rear pressure difference is within the operating range of the water pump; because the water filling pump head selected for the diversion tunnel for high-head pumped storage is high, the outlet regulating valve 286 of the water filling pump and the outlet electric valve 287 of the water filling pump need to be closed and started to ensure that the front and rear pressure difference is within the operating range of the water pump.

[0069] (2) When draining:

[0070] S1: First, the water above the middle flat tunnel of the water diversion tunnel is drained through the drainage gallery 6. Specifically, since the head of the high-head pumped-storage water diversion tunnel is relatively high, the water above the middle flat tunnel 8 of the water diversion tunnel is first drained: a plug 61 is set at the water diversion flat tunnel 8 and the drainage gallery 6 of the middle flat tunnel, and a drainage pipe 62 is set at the plug 61. The water flows in the drainage pipe 62 through the ball valve 63, the flow regulating valve 64 and the energy dissipation sheet 65 in sequence, and reaches the energy dissipation pool 66 arranged at the outlet of the drainage pipe 62, and finally drains to the lower reservoir 7.

[0071] S2: The water is discharged from the diversion tunnel below the horizontal tunnel through the drainage pipe 3;

[0072] The maintenance drainage pump group 33 is pressure-leveled according to the following water flow path: water inlet from the upstream side of the water inlet valve 4 - the second electric ball valve 27 - the second manual gate valve 26 - the needle valve 31 - the second manual ball valve 32 - the maintenance drainage pump bypass valve 357 - the third manual gate valve 34 - the water outlet from the tailwater pressure regulating well 5;

[0073] At the same time, the fifth sensor 45 and the sixth sensor 46 detect the pressure of the maintenance drainage pump group 33;

[0074] S3: When the pressures of the fifth sensor 45 and the sixth sensor 46 are equal, the pressure equalization is completed, and the working element on the first drainage branch 351 of the drainage pump group 33 is automatically started for inspection;

[0075] Drainage is carried out according to the following water flow path: water inlet from the upstream side of the water inlet valve 4 - the first electric ball valve 25 - the second manual gate valve 26 - the needle valve 31 - the second manual ball valve 32 - the electric valve 353 at the water inlet of the drainage pump - the second centrifugal water pump 354 - the check valve 355 at the water outlet of the drainage pump - the electric gate valve 356 at the water outlet of the drainage pump - the third manual gate valve 34 - water outlet from the tailwater pressure regulating well 5.

[0076] S4: When the water level in the diversion tunnel is gradually drained, the maintenance drainage pump group 33 is closed, and the drain valve 9 is opened to gradually drain the rock wall leakage water that may exist in the diversion tunnel through the drain valve 9.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent filling and drainage system for high-head pumped storage diversion tunnels, characterized in that: include: A water filling pipeline (2) and a drainage pipeline (3) are connected to the water diversion lower adit (1); the water inlet of the water filling pipeline (2) is connected to the tailwater pipe (10), and the water outlet of the water filling pipeline (2) is connected to the upstream side of the water inlet valve (4) of the water diversion lower adit (1); the water inlet of the drainage pipeline (3) is connected to the upstream side of the water inlet valve (4) of the water diversion lower adit (1), and the water outlet of the drainage pipeline (3) is connected to the tailwater pressure regulating well (5); the drainage system also includes a drainage gallery (6) connected to the water diversion middle adit (8), and the water outlet of the drainage gallery (6) is connected to the lower reservoir (7).

2. The intelligent filling and drainage system for high-head pumped storage diversion tunnel according to claim 1 is characterized in that: The water filling pipeline (2) is sequentially arranged along the water flow direction with a first manual ball valve (21), an electric gate valve (22), a water filter (23), a first manual gate valve (24), a water diversion tunnel water filling pump group (28), a first electric ball valve (25), a second manual gate valve (26), and a second electric ball valve (27).

3. The intelligent filling and drainage system for high-head pumped storage diversion tunnel according to claim 1 is characterized in that: The drainage pipeline (3) is arranged in sequence along the water flow direction with a second electric ball valve (27), a second manual gate valve (26), a needle valve (31), a second manual ball valve (32), a maintenance drainage pump group (33), and a third manual gate valve (34).

4. The intelligent filling and drainage system for high-head pumped storage diversion tunnel according to claim 2 is characterized in that: The water diversion tunnel water filling pump group (28) comprises a first water filling branch (281) and a second water filling branch (282) arranged in parallel; a water filling pump water inlet electric valve (283), a first centrifugal water pump (284), a water filling pump outlet check valve (285), a water filling pump outlet flow regulating valve (286), and a water filling pump water outlet electric valve (287) are arranged in sequence on the first water filling branch (281) along the water flow direction; a water filling pressure sensor group is arranged in the water diversion tunnel water filling pump group (28); and a water diversion tunnel water filling pump bypass valve (288) is arranged on the second water filling branch (282).

5. The intelligent filling and drainage system for high-head pumped storage diversion tunnel according to claim 4 is characterized in that: The water filling pressure sensor group comprises a first sensor (41) and a fourth sensor (44) arranged at both ends of the first water filling branch (281); the water filling pressure sensor group also comprises a second sensor (42) located at the front end of the electric valve (287) at the water outlet of the water filling pump and a third sensor (43) located at the front end of the flow regulating valve (286) at the outlet of the water filling pump.

6. The intelligent filling and drainage system for high-head pumped storage diversion tunnel according to claim 3 is characterized in that: The maintenance drainage pump group (33) comprises a maintenance drainage main pipe and a first drainage branch (351) and a second drainage branch (352) arranged in parallel. A drainage pressure sensor group is arranged in the maintenance drainage pump group (33); a drainage pump water inlet electric valve (353), a second centrifugal water pump (354), a drainage pump water outlet check valve (355), and a drainage pump water outlet electric gate valve (356) are arranged in sequence on the first drainage branch (351) along the water flow direction; and a maintenance drainage pump bypass valve (357) is arranged on the second drainage branch (352).

7. The intelligent filling and drainage system for high-head pumped storage diversion tunnel according to claim 6 is characterized in that: The drainage pressure sensor group comprises a fifth sensor (45) arranged at the front end of the drainage pump water inlet electric valve (353) on the first drainage branch (351), a sixth sensor (46) at the end of the main drainage pipe for inspection, and a seventh sensor (47) at the rear end of the drainage pump water outlet electric gate valve (356) on the first drainage branch (351).

8. The intelligent filling and drainage system for high-head pumped storage diversion tunnel according to claim 1 is characterized in that: A plug (61) is provided at the drainage gallery (6), and a drainage pipe (62) is externally connected to the plug (61). The water outlet of the drainage pipe (62) is connected to the lower reservoir (7). A ball valve (63), a flow regulating valve (64) and an energy dissipation sheet (65) are sequentially arranged on the drainage pipe (62) along the water flow direction.

9. The intelligent filling and drainage system for high-head pumped-storage water diversion tunnel according to claim 8 is characterized in that: The drainage pipe (62) is provided with an energy dissipation pool (66) at the water outlet, one side of the energy dissipation pool (66) is connected to the construction branch hole drainage ditch (67), the energy dissipation pool (66) has holes (68) at the top and bottom of the side wall connected to the construction branch hole drainage ditch (67), and the outlet of the construction branch hole drainage ditch (67) is connected to the lower reservoir (7).

10. An intelligent filling and drainage method for a high-head pumped-storage water diversion tunnel, characterized in that: The intelligent filling and drainage system for high-head pumped-storage water diversion tunnel according to any one of claims 1 to 9 is adopted: (1) When filling with water: S1: Open the bypass valve (288) of the water diversion tunnel charging pump, the first electric ball valve (25) and the second electric ball valve (27); The water diversion tunnel filling pump group (28) is pressurized forward and backward according to the following water flow path: water inlet of the tailwater pipe (10) - first manual ball valve (21) - electric gate valve (22) - water filter (23) - first manual gate valve (24) - water diversion tunnel filling pump bypass valve (288) - first electric ball valve (25) - second manual gate valve (26) - second electric ball valve (27) - water outlet on the upstream side of the water inlet valve (4); At the same time, the first sensor (41) and the fourth sensor (44) detect the pressure of the water diversion tunnel filling pump group (28); S2: When the pressures of the first sensor (41) and the fourth sensor (44) are equal, the pressure equalization is completed; the bypass valve (288) of the water diversion tunnel filling pump is closed, and the working element on the first water filling branch (281) of the water diversion tunnel filling pump group (28) is automatically started; The water is filled according to the following water flow path: water inlet of the tailwater pipe (10) - the first manual ball valve (21) - the electric gate valve (22) - the water filter (23) - the first manual gate valve (24) - the electric valve (283) at the water inlet of the water filling pump - the first centrifugal water pump (284) - the check valve (285) at the outlet of the water filling pump - the flow regulating valve (286) at the outlet of the water filling pump - the electric valve (287) at the outlet of the water filling pump - the first electric ball valve (25) - the second manual gate valve (26) - the second electric ball valve (27) - water outlet on the upstream side of the water inlet valve (4); At the same time, the third sensor (43) controls the opening of the water filling pump outlet flow regulating valve (286), and the second sensor (42) controls the opening of the water filling pump outlet electric valve (287); (2) When draining: S1: First, drainage is carried out through the drainage gallery (6) above the horizontal tunnel in the diversion tunnel; S2: The water below the horizontal tunnel in the diversion tunnel is discharged through the drainage pipeline (3); The maintenance drainage pump group (33) is pressure-leveled according to the following water flow path: water inlet on the upstream side of the water inlet valve (4) - the second electric ball valve (27) - the second manual gate valve (26) - the needle valve (31) - the second manual ball valve (32) - the maintenance drainage pump bypass valve (357) - the third manual gate valve (34) - the water outlet of the tailwater pressure regulating well (5); At the same time, the fifth sensor (45) and the sixth sensor (46) detect the pressure of the maintenance drainage pump group (33); S3: When the pressures of the fifth sensor (45) and the sixth sensor (46) are equal, the pressure equalization is completed, and the working element on the first drainage branch (351) of the drainage pump group (33) is automatically started for inspection; The water is drained according to the following water flow path: water inlet from the upstream side of the water inlet valve (4) - the second electric ball valve (27) - the second manual gate valve (26) - the needle valve (31) - the second manual ball valve (32) - the electric valve (353) at the water inlet of the drainage pump - the second centrifugal water pump (354) - the check valve (355) at the water outlet of the drainage pump - the electric gate valve (356) at the water outlet of the drainage pump - the third manual gate valve (34) - the water outlet from the tailwater pressure regulating well (5).

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