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

Abstract

The utility model provides an intelligent water filling and draining system 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, a water outlet of the water filling pipeline is connected with the upstream side of a water inlet valve of the diversion lower adit, and a trash rack is arranged at the water inlet of the water filling pipeline; 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 draining of the diversion tunnel can be achieved, and meanwhile vibration to a unit water draining needle valve during water filling and draining can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to water delivery power generation technical field more specifically, it is related to a kind of application in high water head pumping storage diversion tunnel intelligent filling and draining system. BACKGROUND

[0002] With the large-scale development of pumped storage industry in China, more and more pumped storage power stations enter the construction stage, and the diversion tunnel in pumped storage faces important challenges in structural strength and construction due to high-pressure water flow. Therefore, to ensure safety, the diversion tunnel needs to be tested after construction.

[0003] Chinese patent CN202223057444.8 proposes a diversion tunnel drainage device, which includes a drainage mechanism and a telescopic support rod used with the drainage mechanism. The drainage mechanism includes a V-shaped water collecting plate with an arc edge that fits the inner wall of the diversion tunnel. A water guide pipe is arranged at the middle position of the bottom of the V-shaped water collecting plate, and a water guide hose is arranged at the end of the water guide pipe. A limiting pull rope is arranged between the drainage mechanism and the telescopic rod to drain water. The paper "Charging and draining test of No. 1 diversion tunnel of Xianyou pumped storage power station" introduces a full manual charging and draining scheme. At the same time, due to the fact that the diversion tunnel is drained through the needle valve of the unit, the needle valve is subjected to a large pressure, and severe vibration occurs at a small opening, which poses a safety hazard.

[0004] In summary, there is an urgent need for an intelligent filling and draining system and method for high water head pumping storage diversion tunnels in China. INVENTION CONTENTS

[0005] The purpose of the embodiment of the utility model is to provide an intelligent filling and draining system for high water head pumping storage diversion tunnels, which can realize intelligent filling and draining of the diversion tunnel and effectively reduce the vibration of the unit drainage needle valve during filling and draining.

[0006] The embodiment of the utility model provides an intelligent filling and draining system for high water head pumping storage diversion tunnels, which includes a water filling pipeline and a water draining pipeline connected to the diversion under-tunnel. The water inlet of the water filling pipeline is connected to the tail water pipe, and the water outlet of the water filling pipeline is connected to the upstream side of the water inlet valve of the diversion under-tunnel. A trash rack is arranged at the water inlet of the water filling pipeline. The water inlet of the water draining pipeline is connected to the upstream side of the water inlet valve of the diversion under-tunnel, and the water outlet of the water draining pipeline is connected to the tail water surge shaft. The drainage system further includes a drainage gallery connected to the diversion mid-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 diversion tunnel water 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 an embodiment, the drain pipeline is sequentially arranged with 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 along the water flow direction.

[0009] In an embodiment, the water filling tunnel water filling pump group comprises a first water filling branch and a second water filling branch arranged in parallel; the first water filling branch is sequentially arranged with 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 along the water flow direction; a water filling pressure sensor group is arranged in the water filling tunnel water filling pump group; and the second water filling branch is arranged with a water filling tunnel water filling pump bypass valve.

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

[0011] In an embodiment, the maintenance drainage pump group comprises a maintenance drainage main pipe and a first drainage branch and a second drainage branch arranged in parallel; a drainage pressure sensor group is arranged in the maintenance drainage pump group; the first drainage branch is sequentially arranged with 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 along the water flow direction; and the second drainage branch is arranged with a maintenance drainage pump bypass valve.

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

[0013] In an embodiment, a plug is arranged at the drainage gallery, a drainage pipe is connected outwardly at the plug, a water outlet of the drainage pipe is connected to a lower reservoir, and a ball valve, a flow regulating valve, and an energy dissipation piece are sequentially arranged along the water flow direction on the drainage pipe.

[0014] In an embodiment, a stilling basin is arranged at the water outlet of the drainage pipe, one side of the stilling basin is connected to a construction branch hole drainage ditch, holes are arranged at the top and the bottom of the side wall of the stilling basin connected to the construction branch hole drainage ditch, and an outlet of the construction branch hole drainage ditch is connected to the lower reservoir.

[0015] The application of the high-head pumped storage water diversion tunnel intelligent water filling and draining system has the following advantages:

[0016] 1. The application can provide a safe and reliable water filling and draining scheme for a high-head pumped storage water diversion tunnel.

[0017] 2、The present application guarantees the sectional drainage of high water head diversion tunnel by connecting the drainage pipe and the stilling basin outward at the drainage gallery of the middle tunnel of the diversion tunnel, greatly reduces the pressure borne by the needle valve in the plant, and maintains the stability of the unit.

[0018] 3、The present application can realize the automatic filling and draining of the reservoir by the linkage of the water level signal and the electric valve, and solves the instability of the manual adjustment of the valve after the filling pump in the previous project.

[0019] 4、The present application sets the sectional drainage above and below the middle tunnel of the diversion tunnel, can more effectively control the drainage rate, and guarantees that the diversion tunnel will not be dangerous due to the too fast drainage. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0021] Figure 1 is the filling and draining system of the present application.

[0022] Figure 2 is the hub layout of the diversion tunnel of the present application.

[0023] Figure 3 is the layout of the drainage gallery above the middle tunnel of the present application.

[0024] In the drawings, various reference signs are:

[0025] 1, diversion lower tunnel; 2, filling pipe; 3, drainage pipe; 4, water inlet valve; 5, tail water surge tank; 6, drainage gallery; 7, lower reservoir; 8, diversion middle tunnel; 9, emptying valve; 10, tail water pipe; 11, trash rack;

[0026] 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, diversion tunnel filling pump group;

[0027] 281, first filling branch; 282, second filling branch; 283, filling pump water inlet electric valve; 284, first centrifugal water pump; 285, filling pump outlet check valve; 286, filling pump outlet flow regulating valve; 287, filling pump water outlet electric valve; 288, diversion tunnel filling pump bypass valve;

[0028] 31, needle valve; 32, second manual ball valve; 33, maintenance drainage pump set; 34, third manual gate valve;

[0029] 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, maintenance drainage pump bypass valve;

[0030] 41, first sensor; 42, second sensor; 43, third sensor; 44, fourth sensor; 45, fifth sensor; 46, sixth sensor; 47, seventh sensor;

[0031] 61, plug; 62, drain pipe; 63, ball valve; 64, flow regulating valve; 65, energy dissipation piece; 66, stilling basin; 67, construction adit drainage ditch; 68, hole. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical schemes and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0033] 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.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0036] Please refer to Figure 1 ,Figure 2 、 Figure 3 The application provides a high-water-head pumping and storage water diversion tunnel intelligent water filling and draining system.

[0037] The application provides a high-water-head pumping and storage water diversion tunnel intelligent water filling and draining system, which comprises a water filling pipeline 2 and a water draining pipeline 3 connected with a water diversion lower tunnel 1; a water inlet of the water filling pipeline 2 is connected with a draft tube 10, and the water filling pipeline 2 takes water through the draft tube 10 when the system fills water; a water outlet of the water filling pipeline 2 is connected with an upstream side of a water inlet valve 4 of the water diversion lower tunnel 1; a water inlet of the water filling pipeline 2 is provided with a trash rack 11; a water inlet of the water draining pipeline 3 is connected with the upstream side of the water inlet valve 4 of the water diversion lower tunnel 1; and a water outlet of the water draining pipeline 3 is connected with a tailrace surge shaft 5; the water draining system further comprises a water draining gallery 6 connected with a water diversion middle tunnel 8, and a water outlet of the water draining gallery 6 is connected with a lower reservoir 7.

[0038] 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 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 along a water flow direction.

[0039] The water draining 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 draining pump group 33 and a third manual gate valve 34 along the water flow direction.

[0040] 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; the first water filling branch 281 is sequentially provided with 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 along the water flow direction; the water diversion tunnel water filling pump group 28 is provided with a water filling pressure sensor group; and the second water filling branch 282 is provided with a water diversion tunnel water filling pump bypass valve 288.

[0041] 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 water outlet electric valve 287 and a third sensor 43 arranged at a front end of the water filling pump outlet flow regulating valve 286.

[0042] The maintenance water draining pump group 33 comprises a maintenance water draining main pipe and a first water draining branch 351 and a second water draining branch 352 arranged in parallel; the first water draining branch 351 is sequentially provided with a water draining pump water inlet electric valve 353, a second centrifugal water pump 354, a water draining pump water outlet check valve 355 and a water draining pump water outlet electric gate valve 356 along the water flow direction; and the second water draining branch 352 is provided with a maintenance water draining pump bypass valve 357.

[0043] The drainage pressure sensor group comprises a fifth sensor 45 arranged at the front end of the drainage pump inlet water electric valve 353 on the first drainage branch 351, a sixth sensor 46 arranged at the end of the maintenance drainage main pipe, and a seventh sensor 47 arranged at the rear end of the drainage pump outlet water electric gate valve 356 on the first drainage branch 351. Specifically, the fifth sensor 45 and the sixth sensor 46 can monitor the front and rear pressures of the maintenance drainage pump group 33, control the opening and closing of the maintenance drainage pump bypass valve 357 and the drainage pump inlet water electric valve 353; meanwhile, the seventh sensor 47 can control the opening and closing of the drainage pump outlet water electric gate valve 356, and the fifth pressure sensor 45 can control the opening and closing of the water filling pump outlet water electric valve 287.

[0044] A plug 61 is arranged at the drainage gallery 6, and a drainage pipe 62 is connected outwardly at the plug 61, the outlet of the drainage pipe 62 is communicated with the lower reservoir 7, and a ball valve 63, a flow regulating valve 64 and an energy dissipation piece 65 are arranged on the drainage pipe 62 in sequence along the water flow direction. The flow regulating valve 64 can regulate the flow and reduce the pressure according to the water level of the diversion tunnel measured by the fifth sensor 45, so as to ensure that the outlet water pressure is less than 0.3 MPa.

[0045] The drainage pipe 62 is arranged with a stilling basin 66 at the outlet, one side of the stilling basin 66 is connected with a construction adit drainage ditch 67, holes 68 are arranged at the top and the bottom of the side wall of the stilling basin 66 connected with the construction adit drainage ditch 67, the holes 68 can ensure that the gas in the stilling basin 66 enters and the water flow discharges, and the outlet of the construction adit drainage ditch 67 is connected with the lower reservoir 7.

[0046] The utility model also provides a kind of application in high water head pumping storage diversion tunnel intelligent filling and drainage method, it is characterized in that, including the application in any described above of high water head pumping storage diversion tunnel intelligent filling and drainage system:

[0047] (1) when filling water:

[0048] S1: first, the front and rear of the diversion tunnel water filling pump group 28 are balanced, after receiving the water filling signal, the diversion tunnel water filling pump bypass valve 288 on the second water filling branch 282, the first electric ball valve 25 and the second electric ball valve 27 are opened;

[0049] The diversion tunnel water filling pump group 28 is balanced according to the following water flow path: tail water pipe 10 inlet water-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-inlet valve 4 upstream side outlet water;

[0050] Meanwhile, the first sensor 41 and the fourth sensor 44 detect the pressure of the diversion tunnel water filling pump group 28;

[0051] S2: When the first sensor 41 and the fourth sensor 44 are equal in pressure, the equalization is completed, the water diversion tunnel water filling pump bypass valve 288 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 filling pump group 28 is automatically started;

[0052] Water filling according to the following water flow path: tailrace 10 inlet water - first manual ball valve 21 - electric gate valve 22 - water filter 23 - first manual gate valve 24 - water filling pump inlet water 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 water electric valve 287 - 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;

[0053] 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 water electric valve 287. The opening of the water filling pump outlet water electric valve 287 is preferentially opened, and the opening of the water filling pump outlet flow regulating valve 286 is finely adjusted to ensure that the pressure difference before and after is within the operating range of the water pump; because the water head of the selected water diversion tunnel water filling pump is high, the water filling pump outlet flow regulating valve 286 and the water filling pump outlet water electric valve 287 need to be closed and started to ensure that the pressure difference before and after is within the operating range of the water pump.

[0054] (2) Drainage:

[0055] S1: First, the water above the diversion tunnel is drained through the drainage gallery 6. Specifically, because the water head of the high water head pumping storage water diversion tunnel is high, the water above the diversion tunnel is first drained: a plug 61 is arranged at the diversion tunnel and the middle tunnel drainage gallery 6, and a drainage pipe 62 is arranged at the plug 61, the water flows through the ball valve 63, the flow regulating valve 64 and the energy dissipation piece 65 in the drainage pipe 62 in turn, reaches the stilling basin 66 arranged at the outlet of the drainage pipe 62, and is finally drained to the lower reservoir 7.

[0056] S2: The water below the diversion tunnel is drained through the drainage pipe 3;

[0057] The maintenance drainage pump group 33 is equalized according to the following water flow path: inlet water 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 - water outlet of tailwater surge tank 5;

[0058] At the same time, the fifth sensor 45 and the sixth sensor 46 detect the pressure of the maintenance drainage pump group 33;

[0059] S3: When the fifth sensor 45 and the sixth sensor 46 are equal in pressure, the equalization is completed, and the working element on the first drainage branch 351 of the maintenance drainage pump group 33 is automatically started;

[0060] Drainage according to the following water flow path: water inlet upstream of the water inlet valve 4 - first electric ball valve 25 - second manual gate valve 26 - needle valve 31 - second manual ball valve 32 - electric valve 353 of the water inlet of the drainage pump - second centrifugal water pump 354 - check valve 355 of the water outlet of the drainage pump - electric gate valve 356 of the water outlet of the drainage pump - third manual gate valve 34 - water outlet of the tailwater surge tank 5.

[0061] S4: when the water level of the diversion tunnel is gradually emptied, the maintenance drainage pump set 33 is closed and the vent valve 9 is opened, and the rock wall seepage water that may exist in the diversion tunnel is gradually vented through the vent valve 9.

[0062] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A smart filling and drainage system for high-head pumped storage water diversion tunnels, characterized in that, include: A water filling pipeline (2) and a drainage pipeline (3) are connected to the lower horizontal tunnel (1) of the water diversion project; the inlet of the water filling pipeline (2) is connected to the tailwater pipe (10), the outlet of the water filling pipeline (2) is connected to the upstream side of the inlet valve (4) of the lower horizontal tunnel (1), and a trash rack (11) is installed at the inlet of the water 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), and the outlet of the drainage pipeline (3) is connected to the tailwater pressure regulating well (5); the drainage system also includes a drainage corridor (6) connected to the middle horizontal tunnel (8) of the water diversion project, and the outlet of the drainage corridor (6) is connected to the lower reservoir (7).

2. The intelligent filling and drainage system for high-head pumped storage water diversion tunnels according to claim 1, characterized in that, 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).

3. The intelligent filling and drainage system for high-head pumped storage water diversion tunnels according to claim 1, characterized in that, The drainage pipeline (3) is arranged in sequence along the water flow direction as follows: 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).

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

5. The intelligent filling and drainage system for high-head pumped storage water diversion tunnels according to claim 4, characterized in that, 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.

6. The intelligent filling and drainage system for high-head pumped storage water diversion tunnels according to claim 3, characterized in that, 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. A drainage pressure sensor set is installed in the maintenance drainage pump set (33). The first drainage branch (351) is arranged in sequence along the water flow direction with 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).

7. The intelligent filling and drainage system for high-head pumped storage water diversion tunnels according to claim 6, characterized in that, 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).

8. The intelligent filling and drainage system for high-head pumped storage and diversion tunnels according to claim 1, characterized in that, A plug (61) is installed at the drainage corridor (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 plate (65) are arranged sequentially along the water flow direction on the drainage pipe (62).

9. The intelligent filling and drainage system for high-head pumped storage water diversion tunnels according to claim 8, characterized in that, The drain pipe (62) has a stilling pool (66) at the outlet. One side of the stilling pool (66) is connected to the construction adit drainage ditch (67). The stilling pool (66) has holes (68) at the top and bottom of the side wall connected to the construction adit drainage ditch (67). The outlet of the construction adit drainage ditch (67) is connected to the lower reservoir (7).

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