A drainage system and drainage method for a hydropower station

Abstract

This invention relates to the field of water conservancy engineering technology, specifically to a drainage system and method for a hydropower station. The drainage system includes a drainage pool, an upper partition, a lower partition, a lifting mechanism, a mounting frame, a rotating mechanism, multiple oil suction mechanisms, and an oil squeezing mechanism. The drainage pool is divided into a first chamber, a second chamber, and a third chamber by the upper and lower partitions. Clean water is injected into the first chamber until the liquid levels in the first and second chambers are level with the top of the lower partition. Oily wastewater is continuously injected into the first chamber, where floating oil is trapped, and oil-free water is discharged normally from the third chamber. After a period of time, the lifting mechanism moves multiple oil suction mechanisms down to the water surface to absorb oil, and then the rotating mechanism moves the multiple oil suction mechanisms to the upper oil squeezing mechanism to squeeze out the oil absorbed by the multiple oil suction mechanisms and collect it for discharge. This allows for the treatment of oily wastewater, separation of oil, and prevention of pollution to the downstream water environment.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, and in particular to a drainage system and drainage method for a hydropower station. Background Technology

[0002] The drainage system of a hydropower station is a crucial component of the station's key engineering work, playing a vital role in ensuring the safe and stable operation of the station. The drainage system includes: a seepage drainage system, primarily responsible for removing seepage water above the tailrace level within the powerhouse and water leaking during maintenance; a maintenance drainage system, mainly used to remove water accumulated in the tailrace pipe during unit maintenance; and a cooling drainage system, used to drain cooling water from equipment such as turbine guide bearings and generator air coolers.

[0003] Oil leaks are inevitable during the operation and maintenance of hydropower stations, such as oil spills from oil tanks, valve leaks, and oil spills due to maintenance errors. Oil leaking into the sump will flow into the seepage collection well through the unpressurized drainage pipes such as the unit's seat ring drain pipe and the spiral casing nose drain pipe. Oil leaking on the ground outside the sump will flow into the drainage ditch and then into the seepage collection well through the floor drain system. This is oily wastewater. Direct discharge of oily wastewater will pollute the downstream water environment. Summary of the Invention

[0004] The purpose of this invention is to provide a drainage system and method for hydropower stations, which can treat oily wastewater, separate the oil, and avoid pollution of downstream water bodies.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a drainage system for a hydropower station, comprising a drainage pool, an upper partition, a lower partition, a lifting mechanism, a mounting frame, a rotating mechanism, multiple oil suction mechanisms, and an oil squeezing mechanism;

[0006] The upper partition is fixedly installed inside the drainage pool; the lower partition is fixedly installed inside the drainage pool; the drainage pool is divided into a first chamber, a second chamber, and a third chamber by the upper partition and the lower partition; the lifting mechanism is installed at the top of the drainage pool; the mounting frame is installed at the bottom of the lifting mechanism; the rotating mechanism is installed on the mounting frame; multiple oil suction mechanisms are respectively installed on the rotating mechanism for adsorbing oil stains on the water surface; the oil squeezing mechanism is installed on the mounting frame for squeezing out the oil stains adsorbed by the multiple oil suction mechanisms and collecting and discharging them.

[0007] The lifting mechanism includes a top plate, a first hydraulic cylinder, and two limit guide rods.

[0008] The top plate is fixedly installed on the top of the drainage pool; the first hydraulic cylinder is fixedly installed on the top of the top plate, and the output end of the first hydraulic cylinder is fixedly connected to the mounting frame; the two limiting guide rods are respectively fixedly connected to the mounting frame and slidably connected to the top plate, and respectively pass through the top plate.

[0009] The rotating mechanism includes a driving shaft, a driving sprocket, a driven shaft, a driven sprocket, a chain, and a first motor.

[0010] The active shaft is rotatably mounted on the mounting frame; the active sprocket is fixedly mounted on the active shaft; the driven shaft is rotatably mounted on the mounting frame; the driven sprocket is fixedly mounted on the driven shaft; the chain is mounted on the active sprocket and the driven sprocket, and multiple oil suction mechanisms are respectively mounted on the chain.

[0011] The oil-absorbing mechanism includes a support rod, a mounting plate, and two oil-absorbing sponges.

[0012] The support rod is fixedly mounted on the chain; the mounting plate is fixedly mounted on the support rod; and the two oil-absorbing sponges are respectively fixedly mounted on one side of the mounting plate.

[0013] The oil squeezing mechanism includes two transverse guide rods, two protective covers, two squeezing components, and two pushing components;

[0014] The two transverse guide rods are respectively fixedly mounted on the mounting frame; the two protective covers are respectively slidably connected to the two transverse guide rods and are respectively located inside the mounting frame; the two pressing members are respectively mounted on the two protective covers; and the two pushing members are respectively mounted on the mounting frame.

[0015] The protective cover includes a cover body and two mounting ears;

[0016] The cover has a flow-guiding slope and multiple arc-shaped notches; the two mounting ears are fixedly connected to the cover and slidably connected to the two transverse guide rods, and are penetrated by the two transverse guide rods respectively.

[0017] The protective cover also includes a drainage hose;

[0018] One end of the drainage hose is fixedly connected to and communicates with the cover, while the other end passes through the drainage pool.

[0019] The extrusion component includes a bracket, a lead screw, a second motor, two push rods, an extrusion plate, and a drive plate.

[0020] The bracket is fixedly mounted on one side of the cover; the lead screw is rotatably connected to the cover and the bracket, and is located inside the bracket; the second motor is fixedly mounted on one side of the bracket, and the output end of the second motor is fixedly connected to the lead screw; the two push rods are slidably connected to the cover and pass through the cover respectively; the extrusion plate is fixedly mounted on one side of the two push rods and is located inside the cover; the drive plate is fixedly mounted on the side of the two push rods away from the extrusion plate and is threadedly connected to the lead screw.

[0021] The pushing component includes two support plates and two second hydraulic cylinders;

[0022] The two support plates are respectively fixedly mounted on the mounting frame; the two second hydraulic cylinders are respectively fixedly mounted on the two support plates, and the output ends of the two second hydraulic cylinders are fixedly connected to the cover.

[0023] Secondly, the present invention also provides a drainage method for a hydropower station, comprising:

[0024] Fill the first chamber with clean water until the liquid levels in the first and second chambers are level with the top of the lower partition;

[0025] Oily wastewater is continuously injected into the first chamber, where floating oil is trapped. The oil-free water enters the second chamber, then overflows from the top of the lower partition into the third chamber, and is then discharged normally from the third chamber.

[0026] After draining for a period of time, the lifting mechanism drives multiple oil suction mechanisms to move down until they come into contact with the oil on the water surface and begin to absorb the oil.

[0027] The rotating mechanism moves multiple oil suction mechanisms into the upper oil squeezing mechanism, which then squeezes out the oil sludge absorbed by the multiple oil suction mechanisms and collects it for discharge.

[0028] This invention discloses a drainage system and method for a hydroelectric power station. A first chamber and a second chamber are separated by an upper partition, and their bottoms are connected. A second chamber and a third chamber are separated by a lower partition, and their tops are connected. An oil-absorbing mechanism is used to absorb oil from the water surface. A rotating mechanism is used to change the position of multiple oil-absorbing mechanisms. When absorbing oil, the rotating mechanism moves multiple oil-absorbing mechanisms below it, and a lifting mechanism adjusts the height of the multiple oil-absorbing mechanisms to ensure they contact the oil on the water surface. After a period of absorption, the rotating mechanism moves multiple oil-absorbing mechanisms to an oil-squeezing mechanism above it. The oil-squeezing mechanism then squeezes out the oil absorbed by the multiple oil-absorbing mechanisms and collects and discharges the squeezed-out oil. After the oil absorbed by the multiple oil-absorbing mechanisms is squeezed out, they can move downwards again to absorb oil from the water surface.

[0029] In practical use, clean water is injected into the first chamber until the liquid levels in the first and second chambers are level with the top of the lower partition. Oily wastewater is continuously injected into the first chamber, where floating oil is trapped. The oil-free water enters the second chamber, then overflows from the top of the lower partition into the third chamber, and is then discharged normally from the third chamber. After draining for a period of time, the lifting mechanism moves multiple oil-absorbing mechanisms down until they come into contact with the oil on the water surface and begin to absorb the oil. After absorbing for a period of time, the rotating mechanism moves the multiple oil-absorbing mechanisms into the upper oil-squeezing mechanism, which squeezes out the oil absorbed by the multiple oil-absorbing mechanisms and collects it for discharge. This process can treat oily wastewater, separate the oil, and prevent pollution of downstream water bodies. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention.

[0031] Figure 2 This is a structural schematic diagram of the lifting mechanism, mounting frame, rotating mechanism, multiple oil suction mechanisms and oil squeezing mechanism of the first embodiment of the present invention.

[0032] Figure 3 This is a structural schematic diagram of the lifting mechanism, mounting frame, rotating mechanism, multiple oil suction mechanisms and oil squeezing mechanism from another angle, which is a first embodiment of the present invention.

[0033] Figure 4 This is a structural schematic diagram of the lifting mechanism, mounting frame, rotating mechanism, multiple oil suction mechanisms and oil squeezing mechanism from another angle, which is a first embodiment of the present invention.

[0034] Figure 5This is a schematic diagram of the protective cover and extrusion component according to the first embodiment of the present invention.

[0035] Figure 6 This is a structural schematic diagram of the protective cover and the extruder of the first embodiment of the present invention from another angle.

[0036] Figure 7 This is a flowchart illustrating the second embodiment of the present invention.

[0037] In the diagram, 1-drainage pool, 2-upper partition, 3-lower partition, 4-lifting mechanism, 5-mounting frame, 6-rotating mechanism, 7-oil suction mechanism, 8-oil squeezing mechanism, 11-first chamber, 12-second chamber, 13-third chamber, 41-top plate, 42-first hydraulic cylinder, 43-limiting guide rod, 61-drive shaft, 62-drive sprocket, 63-driven shaft, 64-driven sprocket, 65-chain, 66-first motor, 71-support rod. 72-Mounting plate, 73-Oil-absorbing sponge, 81-Horizontal guide rod, 82-Protective cover, 83-Extrusion component, 84-Push component, 821-Cover body, 822-Mounting ear, 823-Drainage hose, 8211-Drainage slope, 8212-Arc-shaped notch, 831-Bracket, 832-Screw rod, 833-Second motor, 834-Push rod, 835-Extrusion plate, 836-Drive plate, 841-Support plate, 842-Second hydraulic cylinder. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "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 this 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 this invention.

[0040] Furthermore, the terms “first”, “second”, etc., 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.

[0041] Therefore, features specified with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The electrical devices, controllers, etc., described in this invention are all conventional setups, and the electrical connections are also conventional connections.

[0044] like Figure 1-6 As shown, the first embodiment of the present invention is as follows:

[0045] This invention provides a drainage system for a hydropower station, comprising a drainage pool 1, an upper partition 2, a lower partition 3, a lifting mechanism 4, a mounting frame 5, a rotating mechanism 6, multiple oil suction mechanisms 7, and an oil squeezing mechanism 8; the drainage pool 1 is divided into a first chamber 11, a second chamber 12, and a third chamber 13 by the upper partition 2 and the lower partition 3; the lifting mechanism 4 includes a top plate 41, a first hydraulic cylinder 42, and two limiting guide rods 43; the rotating mechanism 6 includes a driving shaft 61, a driving sprocket 62, a driven shaft 63, a driven sprocket 64, a chain 65, and a first motor 66; the oil suction mechanism 7 includes a support rod 71, a mounting plate 72, and two oil-absorbing sponges 73; the oil squeezing mechanism 8 includes... The system comprises two transverse guide rods 81, two protective covers 82, two extrusion components 83, and two pusher components 84. Each protective cover 82 includes a cover body 821 and two mounting ears 822. The cover body 821 has a guide slope 8211 and multiple arc-shaped notches 8212. The protective cover 82 also includes a drainage hose 823. Each extrusion component 83 includes a bracket 831, a lead screw 832, a second motor 833, two push rods 834, an extrusion plate 835, and a drive plate 836. Each pusher component 84 includes two support plates 841 and two second hydraulic cylinders 842. This system can treat oily wastewater, separating the oil and preventing pollution of downstream water bodies.

[0046] Furthermore, the upper partition 2 is fixedly installed inside the drainage pool 1; the lower partition 3 is fixedly installed inside the drainage pool 1; the drainage pool 1 is divided into a first chamber 11, a second chamber 12, and a third chamber 13 by the upper partition 2 and the lower partition 3; the lifting mechanism 4 is installed at the top of the drainage pool 1; the mounting frame 5 is installed at the bottom of the lifting mechanism 4; the rotating mechanism 6 is installed on the mounting frame 5; multiple oil suction mechanisms 7 are respectively installed on the rotating mechanism 6 for adsorbing oil stains on the water surface; the oil squeezing mechanism 8 is installed on the mounting frame 5 for squeezing out the oil stains adsorbed by the multiple oil suction mechanisms 7 and collecting and draining them away.

[0047] In this embodiment, the first cavity 11 and the second cavity 12 are separated by the upper partition 2, and their bottoms are connected; the second cavity 12 and the third cavity 13 are separated by the lower partition 3, and their tops are connected; the oil-absorbing mechanism 7 is used to absorb oil stains on the water surface; the rotating mechanism 6 is used to change the position of the plurality of oil-absorbing mechanisms 7; when absorbing oil stains, the rotating mechanism 6 moves the plurality of oil-absorbing mechanisms 7 below the rotating mechanism 6, and the lifting mechanism 4 adjusts the height of the plurality of oil-absorbing mechanisms 7 so that they come into contact with the oil stains on the water surface. After absorbing for a period of time, the rotating mechanism 6 moves the plurality of oil-absorbing mechanisms 7 into the oil-squeezing mechanism 8 above the rotating mechanism 6, and the oil-squeezing mechanism 8 squeezes out the oil stains absorbed by the plurality of oil-absorbing mechanisms 7 and collects and discharges the squeezed-out oil stains; after the oil stains absorbed by the plurality of oil-absorbing mechanisms 7 are squeezed out, they can move down to absorb oil stains on the water surface again;

[0048] In practical use, clean water is injected into the first chamber 11 until the liquid levels in the first chamber 11 and the second chamber 12 are level with the top of the lower partition 3. Oily wastewater is continuously injected into the first chamber 11, where floating oil is intercepted. The oil-free water enters the second chamber 12 and then overflows from the top of the lower partition 3 into the third chamber 13, from which it is discharged normally. After draining for a period of time, the lifting mechanism 4 moves multiple oil-absorbing mechanisms 7 down until they come into contact with the oil on the water surface and begin to absorb the oil. After absorbing for a period of time, the rotating mechanism 6 moves multiple oil-absorbing mechanisms 7 into the upper oil-squeezing mechanism 8, which squeezes out the oil absorbed by the multiple oil-absorbing mechanisms 7 and collects it for discharge. This allows for the treatment of oily wastewater, separating the oil and preventing pollution of downstream water bodies.

[0049] Furthermore, the lifting mechanism 4 includes a top plate 41, a first hydraulic cylinder 42, and two limiting guide rods 43;

[0050] The top plate 41 is fixedly installed on the top of the drainage pool 1; the first hydraulic cylinder 42 is fixedly installed on the top of the top plate 41, and the output end of the first hydraulic cylinder 42 is fixedly connected to the mounting frame 5; the two limiting guide rods 43 are respectively fixedly connected to the mounting frame 5, and respectively slidably connected to the top plate 41, and respectively pass through the top plate 41.

[0051] In this embodiment, the top plate 41 is installed on the top of the drainage pool 1 to support the first hydraulic cylinder 42; the first hydraulic cylinder 42 is used to drive the mounting frame 5 to rise and fall; the two limiting guide rods 43 guide the rise and fall of the mounting frame 5 while also limiting it, and the top of the two limiting guide rods 43 has a limiting plate to prevent the limiting guide rods 43 from detaching from the top plate 41, thereby preventing the mounting frame 5 from falling.

[0052] Furthermore, the rotating mechanism 6 includes a driving shaft 61, a driving sprocket 62, a driven shaft 63, a driven sprocket 64, a chain 65, and a first motor 66;

[0053] The active shaft 61 is rotatably mounted on the mounting frame 5; the active sprocket 62 is fixedly mounted on the active shaft 61; the driven shaft 63 is rotatably mounted on the mounting frame 5; the driven sprocket 64 is fixedly mounted on the driven shaft 63; the chain 65 is mounted on the active sprocket 62 and the driven sprocket 64, and a plurality of oil suction mechanisms 7 are respectively mounted on the chain 65.

[0054] In this embodiment, the first motor 66 drives the active rotating shaft 61, which in turn drives the active sprocket 62 to rotate. The active sprocket 62 drives the driven sprocket 64 to rotate via the chain 65. A plurality of oil suction mechanisms 7 are arranged on the chain 65, which can drive the plurality of oil suction mechanisms 7 to move.

[0055] Furthermore, the oil-absorbing mechanism 7 includes a support rod 71, a mounting plate 72, and two oil-absorbing sponges 73;

[0056] The support rod 71 is fixedly mounted on the chain 65; the mounting plate 72 is fixedly mounted on the support rod 71; and the two oil-absorbing sponges 73 are respectively fixedly mounted on one side of the mounting plate 72.

[0057] In this embodiment, the support rod 71 is used to support the mounting plate 72. The oil-absorbing sponge 73 is installed on the front and rear sides of the mounting plate 72. The oil-absorbing sponge 73 is a graphene-based sponge with good oil absorption and water repellency. After the oil-absorbing sponge 73 comes into contact with oil, it absorbs the oil. By squeezing the oil-absorbing sponge 73, the oil can be squeezed out.

[0058] Furthermore, the oil squeezing mechanism 8 includes two transverse guide rods 81, two protective covers 82, two squeezing members 83, and two pushing members 84;

[0059] Two transverse guide rods 81 are fixedly mounted on the mounting frame 5; two protective covers 82 are slidably connected to the two transverse guide rods 81 and are located inside the mounting frame 5; two pressing members 83 are respectively mounted on the two protective covers 82; and two pushing members 84 are respectively mounted on the mounting frame 5.

[0060] In this embodiment, the two transverse guide rods 81 are used to slide and install the two protective covers 82, and guide the two protective covers 82 so that the two protective covers 82 can be accurately aligned and closed. Driven by the chain 65, after the multiple oil-absorbing sponges 73 filled with oil sludge move between the two upper protective covers 82, the two pushers 84 push the two protective covers 82 to close first, covering the upper ends of the multiple oil-absorbing sponges 73, the multiple mounting plates 72 and the multiple support rods 71. Then the two squeezing members 83 close, squeezing the multiple oil-absorbing sponges 73 in the middle, squeezing out the oil sludge absorbed by the oil-absorbing sponges 73, which flows into the two closed protective covers 82. After the oil sludge is collected and discharged, the two pushers 84 drive the two protective covers 82 to move away from each other and separate. Driven by the chain 65, the multiple oil-absorbing sponges 73 filled with oil sludge can move to the lower part.

[0061] Furthermore, the protective cover 82 includes a cover body 821 and two mounting ears 822;

[0062] The cover 821 has a flow guide slope 8211 and multiple arc-shaped notches 8212; the two mounting ears 822 are fixedly connected to the cover 821 and slidably connected to the two transverse guide rods 81, and are penetrated by the two transverse guide rods 81 respectively.

[0063] In this embodiment, the cover 821 is slidably mounted on the two transverse guide rods 81 via two mounting ears 822. The multiple arc-shaped notches 8212 of the cover 821 are used to fit the support rod 71. After the two covers 821 are closed, the corresponding two arc-shaped notches 8212 close together to form a circular hole for the support rod 71 to pass through. A sealing gasket is provided inside the arc-shaped notch 8212 to ensure that there is no oil leakage. After the two covers 821 are closed, the oil is squeezed out from the oil-absorbing sponge 73 and flows along the guide slope 8211 until it accumulates on one side.

[0064] Furthermore, the protective cover 82 also includes a drainage hose 823;

[0065] One end of the drainage hose 823 is fixedly connected to and communicates with the cover 821, while the other end passes through the drainage pool 1.

[0066] In this embodiment, the drain hose 823 is installed on the side where the oil accumulates, and the oil is drained away from the drain hose 823.

[0067] Furthermore, the extrusion component 83 includes a bracket 831, a lead screw 832, a second motor 833, two push rods 834, an extrusion plate 835, and a drive plate 836;

[0068] The bracket 831 is fixedly disposed on one side of the cover 821; the lead screw 832 is rotatably connected to the cover 821 and the bracket 831, and is located inside the bracket 831; the second motor 833 is fixedly disposed on one side of the bracket 831, and the output end of the second motor 833 is fixedly connected to the lead screw 832; the two push rods 834 are slidably connected to the cover 821 respectively, and pass through the cover 821 respectively; the extrusion plate 835 is fixedly disposed on one side of the two push rods 834, and is located inside the cover 821; the drive plate 836 is fixedly disposed on the side of the two push rods 834 away from the extrusion plate 835, and is threadedly connected to the lead screw 832.

[0069] In this embodiment, the bracket 831 is used to rotatably mount the lead screw 832 and to fixably mount the second motor 833. The second motor 833 drives the lead screw 832 to rotate, and the lead screw 832 drives the drive plate 836. The drive plate 836 drives the extrusion plate 835 to move through the two push rods 834. When the two extrusion plates 835 on both sides are closed, the oil-absorbing sponge 73 can be extruded.

[0070] Furthermore, the pusher 84 includes two support plates 841 and two second hydraulic cylinders 842;

[0071] The two support plates 841 are respectively fixedly mounted on the mounting frame 5; the two second hydraulic cylinders 842 are respectively fixedly mounted on the two support plates 841, and the output ends of the two second hydraulic cylinders 842 are fixedly connected to the cover 821.

[0072] In this embodiment, the two support plates 841 are used to install the two second hydraulic cylinders 842, and the two second hydraulic cylinders 842 synchronously drive the cover 821 to move.

[0073] In this embodiment, a drainage system for a hydropower station is used such that, in practice, clean water is injected into the first chamber 11 until the liquid levels in the first chamber 11 and the second chamber 12 are level with the top of the lower partition 3; oily wastewater is continuously injected into the first chamber 11, where floating oil is intercepted, and oil-free water enters the second chamber 12, then overflows from the top of the lower partition 3 into the third chamber 13, and is then discharged normally from the third chamber 13; after a period of drainage, the lifting mechanism 4 moves multiple oil-absorbing mechanisms 7 downwards until they come into contact with the oil on the water surface, and begin to absorb the oil; after a period of absorption, the rotating mechanism 6 moves the multiple oil-absorbing mechanisms 7 to the upper oil-squeezing mechanism 8, where the oil-squeezing mechanism 8 squeezes out the oil absorbed by the multiple oil-absorbing mechanisms 7 and collects it for discharge; thus, the oily wastewater can be treated, the oil can be separated, and pollution of the downstream water environment can be avoided.

[0074] The second embodiment of this application is as follows:

[0075] Based on the first embodiment, please refer to Figure 7 ,in, Figure 7 This is a flowchart illustrating the second embodiment of the present invention.

[0076] This invention provides a drainage method for a hydropower station, comprising:

[0077] S1 injects clean water into the first chamber 11 until the liquid levels in the first chamber 11 and the second chamber 12 are level with the top of the lower partition 3;

[0078] S2 continuously injects oily wastewater into the first chamber 11. The floating oil is intercepted in the first chamber 11, and the oil-free water enters the second chamber 12, then overflows from the top of the lower partition 3 into the third chamber 13, and is then discharged normally from the third chamber 13.

[0079] After S3 drains water for a period of time, the lifting mechanism 4 drives multiple oil suction mechanisms 7 to move down until they come into contact with the oil on the water surface and begin to absorb the oil.

[0080] The S4 rotating mechanism 6 moves multiple oil suction mechanisms 7 into the upper oil squeezing mechanism 8. The oil squeezing mechanism 8 squeezes out the oil sludge absorbed by the multiple oil suction mechanisms 7 and collects it for discharge.

[0081] The above description is merely 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. A drainage system for a hydropower station, characterized in that, The system includes a drainage pool, an upper partition, a lower partition, a lifting mechanism, a mounting frame, a rotating mechanism, multiple oil suction mechanisms, and an oil squeezing mechanism. The upper partition is fixedly installed inside the drainage pool. The lower partition is also fixedly installed inside the drainage pool. The drainage pool is divided into a first chamber, a second chamber, and a third chamber by the upper and lower partitions. The lifting mechanism is located at the top of the drainage pool. The mounting frame is located at the bottom of the lifting mechanism. The rotating mechanism is mounted on the mounting frame. Multiple oil suction mechanisms are respectively mounted on the rotating mechanism to absorb oil from the water surface. The oil squeezing mechanism is mounted on the mounting frame to squeeze out and collect the oil absorbed by the multiple oil suction mechanisms. The oil squeezing mechanism includes two transverse guide rods, two protective covers, two extrusion components, and two pushing components. The two transverse guide rods are respectively fixedly installed on the mounting frame. The two protective covers are slidably connected to the two transverse guide rods and are located inside the mounting frame. The two extrusion components are respectively mounted on the two protective covers, and the two pushing components are respectively mounted on the mounting frame.

2. The drainage system of the hydropower station according to claim 1, characterized in that, The lifting mechanism includes a top plate, a first hydraulic cylinder, and two limiting guide rods. The top plate is fixedly installed on the top of the drainage pool, the first hydraulic cylinder is fixedly installed on the top of the top plate, the output end of the first hydraulic cylinder is fixedly connected to the mounting frame, and the two limiting guide rods are respectively fixedly connected to the mounting frame and slidably connected to the top plate, and respectively pass through the top plate.

3. The drainage system of the hydropower station according to claim 1, characterized in that, The rotating mechanism includes a drive shaft, a drive sprocket, a driven shaft, a driven sprocket, a chain, and a first motor. The drive shaft is rotatably mounted on the mounting frame, the drive sprocket is fixedly mounted on the drive shaft, the driven shaft is rotatably mounted on the mounting frame, the driven sprocket is fixedly mounted on the driven shaft, the chain is mounted on the drive sprocket and the driven sprocket, and multiple oil suction mechanisms are respectively mounted on the chain.

4. The drainage system of the hydropower station according to claim 1, characterized in that, The oil absorption mechanism includes a support rod, a mounting plate, and two oil-absorbing sponges. The support rod is fixedly mounted on the chain, the mounting plate is fixedly mounted on the support rod, and the two oil-absorbing sponges are respectively fixedly mounted on one side of the mounting plate.

5. The drainage system of the hydropower station according to claim 1, characterized in that, The protective cover includes a cover body and two mounting ears. The cover body has a flow guiding slope and multiple arc-shaped notches. The two mounting ears are fixedly connected to the cover body and slidably connected to two transverse guide rods, and are penetrated by the two transverse guide rods respectively.

6. The drainage system of the hydropower station according to claim 5, characterized in that, The protective cover also includes a drainage hose, one end of which is fixedly connected to and communicates with the cover body, while the other end passes through the drainage pool.

7. The drainage system of the hydropower station according to claim 6, characterized in that, The extrusion component includes a bracket, a lead screw, a second motor, two push rods, an extrusion plate, and a drive plate. The bracket is fixedly mounted on one side of the cover. The lead screw is rotatably connected to the cover and the bracket, and is located inside the bracket. The second motor is fixedly mounted on one side of the bracket, and its output end is fixedly connected to the lead screw. The two push rods are slidably connected to the cover and pass through the cover. The extrusion plate is fixedly mounted on one side of the two push rods and is located inside the cover. The drive plate is fixedly mounted on the side of the two push rods away from the extrusion plate and is threadedly connected to the lead screw.

8. The drainage system of the hydropower station according to claim 7, characterized in that, The pusher includes two support plates and two second hydraulic cylinders. The two support plates are fixedly mounted on the mounting frame, and the two second hydraulic cylinders are fixedly mounted on the two support plates. The output ends of the two second hydraulic cylinders are fixedly connected to the cover.

9. A drainage method for a hydropower station, employing the drainage system of the hydropower station as described in any one of claims 1 to 8, characterized in that, include: Fill the first chamber with clean water until the liquid levels in the first and second chambers are level with the top of the lower partition; Oily wastewater is continuously injected into the first chamber, where floating oil is trapped. The oil-free water enters the second chamber, then overflows from the top of the lower partition into the third chamber, and is then discharged normally from the third chamber. After draining for a period of time, the lifting mechanism drives multiple oil suction mechanisms to move down until they come into contact with the oil on the water surface and begin to absorb the oil. The rotating mechanism moves multiple oil suction mechanisms into the upper oil squeezing mechanism, which then squeezes out the oil sludge absorbed by the multiple oil suction mechanisms and collects it for discharge.

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