A smart filling and drainage system and method for high-head pumped storage water diversion tunnels

Abstract

This invention provides an intelligent filling and drainage system and method for high-head pumped storage water diversion tunnels, comprising: a filling pipeline and a drainage pipeline connecting the lower horizontal tunnel of the water diversion tunnel; the inlet of the filling pipeline is connected to the tailrace pipe, and the outlet of the filling pipeline is connected to the upstream side of the inlet valve of the lower horizontal tunnel; the inlet of the drainage pipeline is connected to the upstream side of the inlet valve of the lower horizontal tunnel, and the outlet of the drainage pipeline is connected to the tailrace surge tank; the drainage system further includes a drainage gallery connecting the middle horizontal tunnel of the water diversion tunnel, and the outlet of the drainage gallery is connected to the lower reservoir. This invention can realize intelligent filling and drainage of water diversion tunnels, and can effectively reduce the vibration of the unit's drainage needle valve during filling and drainage.

Description

Technical Field

[0001] This invention relates to the field of water conveyance and power generation technology, and more specifically, to an intelligent water filling and drainage system and method for high-head pumped storage water diversion tunnels. Background Technology

[0002] With the large-scale development of my country's pumped storage industry, more and more pumped storage power stations are entering the infrastructure construction phase. However, the water diversion tunnels in pumped storage systems face significant challenges in terms of structural strength and construction due to the high-pressure water flow they withstand. Therefore, to ensure safety, a filling and draining test must be conducted on the water diversion tunnels after 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 collection plate, the bottom of which has an arc edge that fits into the inner wall of the water diversion tunnel. A water guide pipe is installed in the middle of the bottom of the V-shaped water collection plate, and a water guide hose is installed at the end of the water guide pipe. A limit rope is installed between the drainage mechanism and the telescopic rod to perform drainage. The paper "Filling and Draining Test of No. 1 Water Diversion Tunnel of Xianyou Pumped Storage Power Station" introduces a filling and drainage scheme that is entirely manual. Furthermore, since the water diversion tunnel drains entirely through the unit's needle valve, the needle valve experiences high pressure, and severe vibration occurs at small openings, posing a safety hazard.

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

[0005] The first objective of this invention is to provide an intelligent filling and drainage system for high-head pumped storage water diversion tunnels, which can realize intelligent filling and drainage of water diversion tunnels, and at the same time effectively reduce the vibration of the unit's drainage needle valve during filling and drainage.

[0006] This invention provides an intelligent filling and drainage system for high-head pumped storage water diversion tunnels, comprising: a filling pipeline and a drainage pipeline connecting to the lower horizontal tunnel of the water diversion tunnel; the inlet of the filling pipeline is connected to the tailrace pipe, and the outlet of the filling pipeline is connected to the upstream side of the inlet valve of the lower horizontal tunnel; the inlet of the drainage pipeline is connected to the upstream side of the inlet valve of the lower horizontal tunnel, and the outlet of the drainage pipeline is connected to the tailrace surge tank; the drainage system further includes a drainage gallery connecting to the middle horizontal tunnel of the water diversion tunnel, and the outlet of the drainage gallery is connected to the lower reservoir.

[0007] In one embodiment, the water filling pipeline is arranged in sequence along the water flow direction, including 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.

[0008] In one embodiment, the drainage pipeline is arranged in sequence along the water flow direction, including a second electric ball valve, a second manual gate valve, a needle valve, a second manual ball valve, a maintenance drainage pump set, and a third manual gate valve.

[0009] In one embodiment, the water diversion tunnel water filling pump group includes a first water filling branch and a second water filling branch arranged in parallel; the first water filling branch is arranged in sequence along the water flow direction, including a water filling pump 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; a water filling pressure sensor group is installed inside the water diversion tunnel water filling pump group; and a water diversion tunnel water 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 located 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 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 set includes a maintenance drainage main pipe and a first drainage branch and a second drainage branch arranged in parallel. A drainage pressure sensor set is installed in the maintenance drainage pump set. A drainage pump inlet electric valve, a second centrifugal water pump, a drainage pump outlet check valve, and a drainage pump outlet electric gate valve are arranged sequentially along the water flow direction on the first drainage branch. A 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 electric valve at the inlet of the drainage pump on the first drainage branch, a sixth sensor located at the end of the main drainage pipe under maintenance, and a seventh sensor located at the rear end of the electric gate valve at the outlet of the drainage pump 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 plug. The outlet of the drainage pipe is connected to the lower reservoir. A ball valve, a flow regulating valve, and an energy dissipation plate are arranged sequentially along the water flow direction on the drainage pipe.

[0014] In one embodiment, a stilling basin is arranged at the outlet of the drain pipe. One side of the stilling basin is connected to the drainage ditch of the construction adit. The stilling basin has openings at the top and bottom of the side wall connected to the drainage ditch of the construction adit. The outlet of the drainage ditch of the construction adit is connected to the lower reservoir.

[0015] This invention also provides an intelligent filling and drainage method for high-head pumped storage tunnels, employing any of the aforementioned intelligent filling and drainage systems for high-head pumped storage tunnels:

[0016] (1) When filling with water:

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

[0018] The water flow path for the water pump set in the water diversion tunnel is as follows: tailrace pipe inlet - first manual ball valve - electric gate valve - water filter - first manual gate valve - water diversion tunnel water pump bypass valve - first electric ball valve - second manual gate valve - second electric ball valve - water outlet on the upstream side of the inlet valve.

[0019] At the same time, the first and fourth sensors detect the pressure of the water pumping unit in the water diversion tunnel;

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

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

[0022] Meanwhile, 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 water:

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

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

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

[0027] Meanwhile, the fifth and sixth sensors detect the pressure of the maintenance drainage pump unit;

[0028] S3: When the pressure of the fifth and sixth sensors is equal, the pressure equalization is completed, and the working element on the first drainage branch of the maintenance drainage pump group is automatically started.

[0029] Drainage follows the following flow path: Water inlet upstream of inlet valve - second electric ball valve - second manual gate valve - needle valve - second manual ball valve - electric valve at drain pump inlet - second centrifugal pump - check valve at drain pump outlet - electric gate valve at drain pump outlet - third manual gate valve - water outlet from tailwater pressure regulating well.

[0030] The beneficial effects of the intelligent filling and drainage system and method for high-head pumped storage water diversion tunnels provided in this invention are as follows:

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

[0032] 2. This invention connects drainage pipes and stilling basins to the drainage gallery at the middle level of the water diversion tunnel, ensuring segmented drainage of the high-head water diversion tunnel, greatly reducing the pressure on the needle valves in the plant, and maintaining the stability of the unit.

[0033] 3. This invention uses a water level signal to link with an electric valve, enabling automatic filling and drainage of the upper reservoir, thus solving the problem of unstable manual adjustment of the valve after the filling pump during previous projects.

[0034] 4. The present invention sets up 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 due to excessive drainage and thus avoid danger. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0037] Figure 2 This is a schematic diagram of the hub layout of the water diversion tunnel of this invention.

[0038] Figure 3 This is a layout diagram of the drainage corridor above the flat tunnel in this invention.

[0039] The following are the labeling elements in the figure:

[0040] 1. Water intake tunnel; 2. Water filling pipeline; 3. Drainage pipeline; 4. Inlet valve; 5. Tailwater surge tank; 6. Drainage gallery; 7. Lower reservoir; 8. Water intake tunnel; 9. Vent 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 set;

[0042] 281. First water filling branch; 282. Second water filling branch; 283. Electric valve at the 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 for the water filling pump in the water diversion tunnel;

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

[0044] 351. First drainage branch; 352. Second drainage branch; 353. Electric valve at the inlet of the drainage pump; 354. Second centrifugal water pump; 355. Check valve at the outlet of the drainage pump; 356. Electric gate valve at the outlet of the drainage pump; 357. Bypass valve for maintenance drainage pump.

[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 plate; 66. Stilling basin; 67. Drainage ditch for construction adit; 68. Hole. Detailed Implementation

[0047] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

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

[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] Please refer to the following: Figure 1 , Figure 2 , Figure 3 The present invention will now describe an intelligent filling and drainage system and method for high-head pumped storage water diversion tunnels.

[0052] A smart filling and drainage system for high-head pumped storage water diversion tunnels includes: a filling pipeline 2 and a drainage pipeline 3 connecting the lower horizontal tunnel 1 of the water diversion tunnel; the inlet of the filling pipeline 2 is connected to the tailrace pipe 10, and the filling pipeline 2 draws water through the tailrace pipe 10 when the system is filled; the outlet of the filling pipeline 2 is connected to the upstream side of the inlet valve 4 of the lower horizontal tunnel 1 of the water diversion tunnel; a trash rack 11 is installed at the inlet of the filling pipeline 2; the inlet of the drainage pipeline 3 is connected to the upstream side of the inlet valve 4 of the lower horizontal tunnel 1 of the water diversion tunnel; the outlet of the drainage pipeline 3 is connected to the tailrace pressure regulating well 5; the drainage system also includes a drainage corridor 6 connecting the middle horizontal tunnel 8 of the water diversion tunnel; the outlet of the drainage corridor 6 is connected to the lower reservoir 7.

[0053] The water filling pipeline 2 is arranged in sequence along the water flow direction, including 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.

[0054] The drainage pipeline 3 is arranged in sequence along the water flow direction, including 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 water filling pump group 28 includes a first water filling branch 281 and a second water filling branch 282 arranged in parallel. The first water filling branch 281 is arranged in sequence along the water flow direction, including a water filling pump 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 outlet electric valve 287. A water filling pressure sensor group is installed inside the water diversion tunnel water filling pump group 28. The second water filling branch 282 is arranged with a water diversion tunnel water filling pump bypass valve 288.

[0056] The water filling pressure sensor group includes a first sensor 41 and a fourth sensor 44 located 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 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.

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

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

[0059] The drainage corridor is equipped with plugs 61 at 6 locations, and drainage pipes 62 are connected to the plugs 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 plate 65 are arranged sequentially along the water flow direction on the drainage pipe 62. The flow regulating valve 64 can adjust the flow and reduce the pressure according to the water level in the water diversion tunnel measured by the fifth sensor 45 in the pipeline, ensuring that the outlet pressure is less than 0.3 MPa.

[0060] The drain pipe 62 has a stilling basin 66 at the outlet. One side of the stilling basin 66 is connected to the construction adit drainage ditch 67. The stilling basin 66 has holes 68 at the top and bottom of the side wall connected to the construction adit drainage ditch 67. The holes 68 can ensure that gas enters the stilling basin 66 and water flows out. The outlet of the construction adit drainage ditch 67 is connected to the lower reservoir 7.

[0061] This invention also provides an intelligent filling and drainage method for high-head pumped storage tunnels, characterized in that it includes any of the above-described intelligent filling and drainage systems for high-head pumped storage tunnels:

[0062] (1) When filling with water:

[0063] S1: First, the water pump set 28 of the water diversion tunnel is pressure balanced before and after. After receiving the water filling signal, the bypass valve 288, the first electric ball valve 25 and the second electric ball valve 27 of the water diversion tunnel water filling pump on the second water filling branch 282 are opened.

[0064] The water flow path for the water diversion tunnel filling pump set 28 is as follows: water inlet of tailpipe 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 inlet valve 4;

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

[0066] S2: When the pressure 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 water 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 water pump group 28 is automatically started.

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

[0068] Simultaneously, 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 pressure difference before and after the pump is within the pump's operating range. Because the water filling pump used in the high-head pumping system has a high head, the outlet regulating valve 286 and the outlet electric valve 287 of the water filling pump need to be closed and activated to ensure that the pressure difference before and after the pump is within the pump's operating range.

[0069] (2) When draining water:

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

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

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

[0073] Meanwhile, the fifth sensor 45 and the sixth sensor 46 detect the pressure of the maintenance drainage pump set 33;

[0074] S3: When the pressure 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 maintenance drainage pump group 33 is automatically started.

[0075] Drainage follows the following flow path: Water inlet on the upstream side of inlet valve 4 - First electric ball valve 25 - Second manual gate valve 26 - Needle valve 31 - Second manual ball valve 32 - Electric valve at the inlet of drainage pump 353 - Second centrifugal water pump 354 - Check valve at the outlet of drainage pump 355 - Electric gate valve at the outlet of drainage pump 356 - Third manual gate valve 34 - Water outlet from tailwater pressure regulating well 5.

[0076] S4: After the water level in the water diversion tunnel is gradually emptied, shut down the maintenance and drainage pump group 33, open the venting valve 9, and gradually release any rock wall seepage water that may exist in the water diversion tunnel through the venting 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 within the protection scope of the present invention.

Claims

1. An intelligent water filling and draining system applied to a high water head pumped storage diversion tunnel, characterized in that, The application relates to a water filling and discharging system for a diversion tunnel. The water filling pipeline (2) is connected with a tail water pipe (10) at an inlet, and connected with a water inlet valve (4) of the diversion tunnel at an outlet; the water discharging pipeline (3) is connected with the water inlet valve (4) of the diversion tunnel at an inlet, and connected with a tail water surge shaft (5) at an outlet; the water discharging system further comprises a water discharging gallery (6) connected with a diversion tunnel (8), and the water discharging gallery (6) is connected with a lower reservoir (7) at an outlet; The water filling pipeline (2) is sequentially provided with a first manual ball valve (21), an electric gate valve (22), a water filter (23), a first manual gate valve (24), a 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) along a water flow direction. The diversion tunnel water filling pump group (28) comprises a first water filling branch (281) and a second water filling branch (282) arranged in parallel; the first water filling branch (281) is sequentially provided with a water filling pump 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), a water filling pump outlet electric valve (287) along a water flow direction; the diversion tunnel water filling pump group (28) is provided with a water filling pressure sensor group; the second water filling branch (282) is provided with a diversion tunnel water filling pump bypass valve (288). The water filling pressure sensor group comprises a first sensor (41) and a fourth sensor (44) arranged at two ends of the first water filling branch (281); the water filling pressure sensor group further comprises a second sensor (42) arranged at a front end of the water filling pump outlet electric valve (287) and a third sensor (43) arranged at a front end of the water filling pump outlet flow regulating valve (286).

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

3. The intelligent water filling and draining system for high water head pumped storage diversion tunnel according to claim 2, characterized in that, The maintenance water discharging pump group (33) comprises a maintenance water discharging main pipe and a first water discharging branch (351) and a second water discharging branch (352) arranged in parallel; the maintenance water discharging pump group (33) is provided with a water discharging pressure sensor group; the first water discharging branch (351) is sequentially provided with a water discharging pump inlet electric valve (353), a second centrifugal water pump (354), a water discharging pump outlet check valve (355) and a water discharging pump outlet electric gate valve (356) along a water flow direction; the second water discharging branch (352) is provided with a maintenance water discharging pump bypass valve (357).

4. The intelligent water filling and draining system for high water head pumped storage diversion tunnel according to claim 3, characterized in that, The water discharging pressure sensor group comprises a fifth sensor (45) arranged at a front end of the water discharging pump inlet electric valve (353) on the first water discharging branch (351), a sixth sensor (46) arranged at a tail end of the maintenance water discharging main pipe and a seventh sensor (47) arranged at a rear end of the water discharging pump outlet electric gate valve (356) on the first water discharging branch (351).

5. The intelligent water filling and draining system for high water head pumped storage diversion tunnel according to claim 4, characterized in that, The drain gallery (6) is provided with a plug (61), and a drain pipe (62) is connected outward at the plug (61), a water outlet of the drain pipe (62) is communicated with the lower reservoir (7), and the drain pipe (62) is sequentially provided with a ball valve (63), a flow regulating valve (64) and an energy dissipation sheet (65) in the water flow direction.

6. The intelligent water filling and draining system for high water head pumped storage diversion tunnel according to claim 5, characterized in that, The drain pipe (62) is provided with a stilling basin (66) at the water outlet, one side of the stilling basin (66) is connected with a construction adit drain ditch (67), and the stilling basin (66) is provided with holes (68) at the top and the bottom of the side wall connected with the construction adit drain ditch (67); and the outlet of the construction adit drain ditch (67) is connected with the lower reservoir (7).

7. An intelligent water filling and draining method applied to a high water head pumped storage diversion tunnel, characterized in that, The intelligent water filling and draining system for high water head pumped storage diversion tunnel of claim 6: (1) When filling water: S1: open the diversion tunnel water filling pump bypass valve (288), the first electric ball valve (25) and the second electric ball valve (27); The diversion tunnel water filling pump group (28) is subjected to front and back pressure balancing according to the following water flow path: tail water pipe (10) inlet - first manual ball valve (21) - electric gate valve (22) - water filter (23) - first manual gate valve (24) - diversion tunnel water 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 inlet valve (4); Meanwhile, the first sensor (41) and the fourth sensor (44) detect the pressure of the diversion tunnel water filling pump group (28); S2: when the first sensor (41) and the fourth sensor (44) are equal in pressure, the pressure balancing is completed; the diversion tunnel water filling pump bypass valve (288) is closed, and the working element on the first water filling branch (281) of the diversion tunnel water filling pump group (28) is automatically started; The water filling is performed according to the following water flow path: tail water pipe (10) inlet - first manual ball valve (21) - electric gate valve (22) - water filter (23) - first manual gate valve (24) - water inlet electric valve (283) of the water filling pump - first centrifugal water pump (284) - water filling pump outlet check valve (285) - water filling pump outlet flow regulating valve (286) - water outlet electric valve (287) of the water filling pump - first electric ball valve (25) - second manual gate valve (26) - second electric ball valve (27) - water outlet on the upstream side of the inlet valve (4); Meanwhile, the third sensor (43) controls the opening degree of the water filling pump outlet flow regulating valve (286), and the second sensor (42) controls the opening degree of the water outlet electric valve (287) of the water filling pump; (2) When draining water: S1: first, the tunnel above the horizontal hole is drained through the drain gallery (6); S2: the tunnel below the horizontal hole is drained through the drain pipe (3); The maintenance drainage pump group (33) is subjected to pressure balancing according to the following water flow path: inlet on the upstream side of the inlet valve (4) - second electric ball valve (27) - second manual gate valve (26) - needle valve (31) - second manual ball valve (32) - maintenance drainage pump bypass valve (357) - third manual gate valve (34) - tail water surge tank (5) outlet; Meanwhile, the fifth sensor (45) and the sixth sensor (46) detect the pressure of the maintenance drainage pump group (33); S3: When the fifth sensor (45) and the sixth sensor (46) pressure is equal, the flat pressure is completed, and the automatic starting maintenance drainage pump group (33) first drainage branch (351) on the working element; Drainage according to the following water flow path: inlet valve (4) upstream side water inlet-second electric ball valve (27)-second manual gate valve (26)-needle valve (31)-second manual ball valve (32)-drainage pump water inlet electric valve (353)-second centrifugal water pump (354)-drainage pump water outlet check valve (355)-drainage pump water outlet electric gate valve (356)-third manual gate valve (34)-tail water surge tank (5) outlet.

Images