Multifunctional hydroelectric generation device

Abstract

The invention discloses a multifunctional hydroelectric generation device, which belongs to the technical field of hydroelectric generation and comprises a power generation mechanism for generating power, and a sediment mechanism for isolating and metering sediment and a flow mechanism for adjusting water flow are arranged on the power generation mechanism; the power generation mechanism can generate power under the action of water flow, and meanwhile, heat energy generated in the power generation process can be utilized; the silt mechanism can isolate silt and measure the content of the silt in water, so that the water quality is convenient to analyze; the flow mechanism can adjust the water flow of the water inlet pipe according to the water flow, and when the water flow is too large, the water inlet pipe is closed to protect the power generation mechanism and discharge flow.

Description

Technical Field

[0001] The invention relates to the technical field of hydropower generation, and in particular to a multifunctional hydropower generation device. Background Art

[0002] Hydropower engineering is a project to prevent floods and rationally allocate and utilize water resources. It includes important functions such as flood control, irrigation, water control, power generation and shipping. Power generation is one of the most important functions of hydropower engineering. The world's largest hydropower station is my country's Three Gorges Hydropower Station, which provides electricity to many cities in central my country and southern China. In addition to the basic power generation function, the extended value of hydropower engineering is constantly expanding with the innovation of technology, including water resource allocation, kinetic energy recovery, and agricultural and fishery co-production. Hydropower generation devices in the existing technology usually only use the rotation of the rotor to generate electricity, but cannot achieve other functions, nor can they discharge water when the water flow is too large. Excessive water flow may cause damage to the device. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: a multifunctional hydroelectric power generation device, comprising a power generation mechanism for generating electricity, the power generation mechanism comprising a dam, the power generation mechanism being provided with a sediment mechanism for isolating and measuring sediment, and a flow mechanism for regulating water flow; The power generation mechanism comprises four water inlet pipes fixedly mounted on the dam, and power generation fan blades are rotatably mounted in the water inlet pipes.

[0004] Furthermore, the power generation mechanism also includes a power generation shell fixedly mounted on the water inlet pipe, a stator fixedly mounted in the power generation shell, a magnetic pole fixedly mounted on the stator, a rotor fixedly mounted on the power generation blades, and a coil fixedly mounted on the rotor.

[0005] Furthermore, a heating pipe is rotatably installed inside the rotor, and the heating pipe is used to conduct away the heat generated by the rotation of the rotor.

[0006] Water flows in from the upper end of the water inlet pipe, and then flows through the generator blades, driving the generator blades, rotor and coil to rotate, thereby generating electricity through the relative movement of the coil and the magnetic pole. At the same time, the heat energy generated by the rotation of the rotor is transmitted through the heating tube.

[0007] Furthermore, the sediment mechanism includes an upper filter plate and a lower filter plate fixedly installed at the lower end of the water inlet pipe, a downward pressure slope block is slidably installed in the water inlet pipe, a downward pressure spring is arranged between the downward pressure slope block and the water inlet pipe, a sand collecting pool is arranged below the water inlet pipe, and a slope surface is arranged on the downward pressure slope block.

[0008] Furthermore, a rotating impeller is rotatably installed in the water inlet pipe, an impeller gear is fixedly installed on the rotating impeller, an upper gear is rotatably installed on the water inlet pipe, a toothless gear is fixedly installed on the upper gear, and a transmission belt is wrapped around the upper gear and the impeller gear.

[0009] Further, four metering modules are provided on the water inlet pipe. The metering module includes a counting wheel rotatably installed on the water inlet pipe. An internally toothed gear and an internal gear ring are fixedly installed on the counting wheel. Three outer gears are rotatably installed on the water inlet pipe. An inner gear is fixedly installed on the outer gear. The inner gear meshes with the internal gear ring. A scale is provided on the counting wheel.

[0010] Further, the outer gear of the metering module beside the toothed gear meshes with the toothed gear, and the outer gears of the remaining three metering modules mesh with the internally toothed gears of the adjacent metering modules.

[0011] When water flows into the water inlet pipe, the water flow drives the rotating impeller and the impeller gear to rotate, drives the upper gear and the toothed gear to rotate through the transmission belt. The toothed gear drives the outer gear meshing with it to rotate intermittently, thereby driving the inner gear to rotate intermittently, and then driving the internal gear ring and the counting wheel of the metering module close to the toothed gear to rotate intermittently. Through the internally toothed gear, it drives the outer gear and the inner gear of the next metering module to rotate intermittently, thereby driving the internal gear ring and the counting wheel of the next metering module to rotate intermittently, and finally driving the four counting wheels to rotate. The farther the counting wheel is from the upper gear, the lower the rotation frequency, and the closer the counting wheel is to the upper gear, the higher the rotation frequency. The water flow rate is recorded through the rotation of the four counting wheels.

[0012] The upper filter plate and the lower filter plate can allow water flow through and block the sediment. The blocked sediment will remain and accumulate on the downward slope block. As the sediment accumulates, the downward slope block gradually descends along the water inlet pipe, the downward pressure spring is compressed, and finally the sediment is discharged into the sediment collection pool. The sediment content can be calculated according to the scale of the counting wheel and the sediment amount in the sediment collection pool.

[0013] Further, the flow mechanism includes a runner fixedly installed on the power generation fan blade. A number of centrifugal rods are slidably installed on the runner. An inner spring is provided between the centrifugal rod and the runner. A jacking rod is slidably installed on the dam. An upper rack is fixedly installed on the jacking rod. A gate plate is slidably installed on the dam. A lower rack is fixedly installed on the gate plate. When the upper rack rises, it drives the lower rack to rise through gear transmission.

[0014] Further, a drainage channel is provided inside the dam. A water discharge port is provided on the dam. The drainage channel is communicated with the water discharge port. The water discharge port is connected to an external drainage pipe. An inlet is provided on the dam. The inlet is communicated with the drainage channel. A number of ejector plates are rotatably installed on the dam. A torsion spring is provided between the ejector plate and the dam. When the gate plate is not raised, the gate plate is located outside the ejector plate, the torsion spring is in a twisted state, and the inlet is blocked by the gate plate.

[0015] When the power generation fan blade rotates, it drives the runner to rotate. As a result, under the action of centrifugal force, the centrifugal rod moves outward relative to the runner, stretching the inner spring. The centrifugal rod jacks up the jacking rod and the upper rack. The faster the power generation fan blade rotates, the more the jacking rod and the upper rack rise. The upper rack drives the lower rack and the gate to rise through multi-stage gear transmission. The rising of the gate blocks the water inlet pipe, thereby adjusting the water flow rate into the water inlet pipe according to the rotation speed of the power generation fan blade. When the gate rises to the highest point, it completely closes the upper end of the water inlet pipe. At this time, the gate leaves the outside of the ejection plate, and the torsion spring rebounds, causing the ejection plate to pop out to reach the lower end of the gate and support the gate. Since the ejection plate cannot rotate relative to the dam anymore, the gate cannot descend. At this time, the power generation fan blade stops rotating, and the gate will not descend either. Manual reset of the gate is required to ensure the safety of the equipment. At this time, water flows from the water inlet into the drainage channel and finally discharges from the water discharge port for flood discharge.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: (1) The power generation mechanism provided by the present invention can generate electricity under the action of water flow and can utilize the heat energy generated during the power generation process; (2) The sediment mechanism provided by the present invention can isolate sediment and measure the sediment content in water, facilitating water quality analysis; (3) The flow rate mechanism provided by the present invention can adjust the water flow rate of the water inlet pipe according to the size of the water flow, and when the water flow rate is too large, it closes the water inlet pipe to protect the power generation mechanism and conduct flood discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention (first perspective).

[0018] Figure 2 It is a schematic diagram of the structure of the power generation mechanism of the present invention Figure 1 .

[0019] Figure 3 It is a schematic diagram of the structure of the power generation mechanism of the present invention Figure 2 .

[0020] Figure 4 It is a schematic diagram of the structure of the power generation mechanism of the present invention Figure 3 .

[0021] Figure 5 It is a schematic diagram of the structure of the power generation mechanism of the present invention Figure 4 .

[0022] Figure 6 It is a schematic diagram of the structure of the sediment mechanism of the present invention Figure 1 .

[0023] Figure 7 It is a schematic diagram of the structure of the sediment mechanism of the present invention Figure 2 .

[0024] Figure 8Structural Schematic of the Sediment Mechanism of the Present Invention Figure 3 。

[0025] Figure 9 Structural Schematic of the Sediment Mechanism of the Present Invention Figure 4 。

[0026] Figure 10 Structural Schematic of the Sediment Mechanism of the Present Invention Figure 5 。

[0027] Figure 11 Structural Schematic of the Flow Rate Mechanism of the Present Invention Figure 1 。

[0028] Figure 12 Structural Schematic of the Flow Rate Mechanism of the Present Invention Figure 2 。

[0029] Figure 13 Structural Schematic of the Flow Rate Mechanism of the Present Invention Figure 3 。

[0030] Figure 14 Structural Schematic of the Flow Rate Mechanism of the Present Invention Figure 4 。

[0031] Figure 15 is Figure 14 the partial enlarged schematic diagram at position A in

[0032] Figure 16 Structural Schematic of the Flow Rate Mechanism of the Present Invention Figure 5 。

[0033] Reference Numerals in the Drawings: 101 - Dam; 102 - Inlet Pipe; 103 - Power Generation Shell; 104 - Power Generation Fan Blade; 105 - Stator; 106 - Magnetic Pole; 107 - Rotor; 108 - Coil; 109 - Heating Tube; 201 - Upper Filter Plate; 202 - Lower Filter Plate; 203 - Lower Pressing Slope Block; 204 - Lower Pressing Spring; 205 - Sand Collection Pond; 206 - Rotating Impeller; 207 - Impeller Gear; 208 - Transmission Belt; 209 - Counting Wheel; 210 - Upper Gear; 211 - Tooth - Missing Gear; 212 - Internal Gear Ring; 213 - Internal Tooth - Missing Gear; 214 - Outer Gear; 215 - Inner Gear; 301 - Gate Plate; 302 - Drainage Outlet; 303 - Runner; 304 - Centrifugal Rod; 305 - Inner Spring; 306 - Jacking Rod; 307 - Upper Rack; 308 - Lower Rack; 309 - Water Inlet; 310 - Ejector Plate; 311 - Torsion Spring; 312 - Drainage Channel. Detailed Embodiment

[0034] The following further describes the detailed embodiment of the present invention with reference to the accompanying drawings.

[0035] Embodiment: Refer to Figures 1 - 16, a multifunctional hydroelectric power generation device, including a power generation mechanism for power generation. The power generation mechanism includes a dam 101, and a sediment mechanism for isolating and measuring sediment and a flow mechanism for adjusting the water flow are provided on the power generation mechanism; The power generation mechanism includes four water inlet pipes 102 fixedly installed on the dam 101, and a power generation fan blade 104 is rotatably installed in the water inlet pipe 102.

[0036] As Figures 2 - 5 shown, the power generation mechanism further includes a power generation shell 103 fixedly installed on the water inlet pipe 102. A stator 105 is fixedly installed in the power generation shell 103, a magnetic pole 106 is fixedly installed on the stator 105, a rotor 107 is fixedly installed on the power generation fan blade 104, and a coil 108 is fixedly installed on the rotor 107.

[0037] As Figures 2 - 5 shown, a heating pipe 109 is rotatably installed in the rotor 107, and the heating pipe 109 is used to export the heat generated by the rotation of the rotor 107.

[0038] Water flows into the upper end of the water inlet pipe 102, and then the water passes through the power generation fan blade 104, driving the power generation fan blade 104, the rotor 107 and the coil 108 to rotate, so as to generate electricity through the relative movement of the coil 108 and the magnetic pole 106. At the same time, the heat energy generated by the rotation of the rotor 107 is transmitted through the heating pipe 109.

[0039] As Figures 6 - 10 shown, the sediment mechanism includes an upper filter plate 201 and a lower filter plate 202 fixedly installed at the lower end of the water inlet pipe 102. A downward pressing slope block 203 is slidably installed in the water inlet pipe 102. A downward pressing spring 204 is arranged between the downward pressing slope block 203 and the water inlet pipe 102. A sand collecting pool 205 is arranged below the water inlet pipe 102, and a slope is arranged on the downward pressing slope block 203.

[0040] As Figures 6 - 10 shown, a rotating impeller 206 is rotatably installed in the water inlet pipe 102. An impeller gear 207 is fixedly installed on the rotating impeller 206. An upper gear 210 is rotatably installed on the water inlet pipe 102. A toothless gear 211 is fixedly installed on the upper gear 210. A transmission belt 208 is wound around the upper gear 210 and the impeller gear 207.

[0041] As Figures 6 - 10 shown, four measuring modules are arranged on the water inlet pipe 102. The measuring module includes a counting wheel 209 rotatably installed on the water inlet pipe 102. An inner toothless gear 213 and an inner gear ring 212 are fixedly installed on the counting wheel 209. Three outer gears 214 are rotatably installed on the water inlet pipe 102. An inner gear 215 is fixedly installed on the outer gear 214. The inner gear 215 meshes with the inner gear ring 212, and a scale is arranged on the counting wheel 209.

[0042] As Figures 6 - 10 shown, the outer gear 214 of the metering module located beside the toothless gear 211 meshes with the toothless gear 211, and the outer gears 214 of the remaining three metering modules mesh with the inner toothless gears 213 of the adjacent metering modules.

[0043] When water flows into the water inlet pipe 102, the water flow drives the rotating impeller 206 and the impeller gear 207 to rotate, drives the upper gear 210 and the toothless gear 211 to rotate through the transmission belt 208. The toothless gear 211 drives the outer gear 214 meshing with it to rotate intermittently, thereby driving the inner gear 215 to rotate intermittently, thereby driving the inner gear ring 212 and the counting wheel 209 of the metering module close to the toothless gear 211 to rotate intermittently. Through the inner toothless gear 213, it drives the outer gear 214 and the inner gear 215 of the next metering module to rotate intermittently, thereby driving the inner gear ring 212 and the counting wheel 209 of the next metering module to rotate intermittently, and finally drives the four counting wheels 209 to rotate. The closer the counting wheel 209 is to the upper gear 210, the higher its rotation frequency, and the farther the counting wheel 209 is from the upper gear 210, the lower its rotation frequency. The water flow rate is recorded through the rotation of the four counting wheels 209.

[0044] The upper filter plate 201 and the lower filter plate 202 can allow water flow through and block the sediment. The blocked sediment will remain and accumulate on the downward slope block 203. As the sediment accumulates, the downward slope block 203 gradually descends along the water inlet pipe 102, and the downward pressure spring 204 is compressed. Finally, the sediment is discharged into the sediment collection pool 205. The sediment content can be calculated according to the scale of the counting wheel 209 and the sediment volume in the sediment collection pool 205.

[0045] As Figures 11 - 16 shown, the flow mechanism includes a runner 303 fixedly installed on the power generation fan blade 104. A number of centrifugal rods 304 are slidably installed on the runner 303. An inner spring 305 is arranged between the centrifugal rod 304 and the runner 303. A jacking rod 306 is slidably installed on the dam 101. An upper rack 307 is fixedly installed on the jacking rod 306. A gate plate 301 is slidably installed on the dam 101. A lower rack 308 is fixedly installed on the gate plate 301. When the upper rack 307 rises, it drives the lower rack 308 to rise through gear transmission.

[0046] As Figures 11 - 16As shown in the figure, a drainage channel 312 is provided inside the dam 101, a water discharge opening 302 is provided on the dam 101, the drainage channel 312 is communicated with the water discharge opening 302, the water discharge opening 302 is connected to an external drainage pipe, a water inlet 309 is provided on the dam 101, the water inlet 309 is communicated with the drainage channel 312, a plurality of pop-up plates 310 are rotatably installed on the dam 101, a torsion spring 311 is provided between the pop-up plate 310 and the dam 101. When the gate plate 301 is not raised, the gate plate 301 is located outside the pop-up plate 310, the torsion spring 311 is in a twisted state, and the water inlet 309 is blocked by the gate plate 301.

[0047] When the power generation fan blade 104 rotates, it will drive the runner 303 to rotate, so that under the action of centrifugal force, the centrifugal rod 304 moves outward relative to the runner 303, the inner spring 305 is stretched, and the jacking rod 306 and the upper rack 307 are jacked up through the centrifugal rod 304. The faster the power generation fan blade 104 rotates, the more the jacking rod 306 and the upper rack 307 rise. The upper rack 307 drives the lower rack 308 and the gate plate 301 to rise through multi-stage gear transmission. When the gate plate 301 rises, it will block the water inlet pipe 102, so as to adjust the flow rate of the water entering the water inlet pipe 102 according to the rotation speed of the power generation fan blade 104. When the gate plate 301 rises to the highest point, it will completely close the upper end of the water inlet pipe 102. At this time, the gate plate 301 leaves the outside of the pop-up plate 310, and the torsion spring 311 rebounds, so that the pop-up plate 310 pops out to reach the lower end of the gate plate 301 and holds the gate plate 301. Since the pop-up plate 310 cannot rotate relative to the dam 101 any more, the gate plate 301 cannot descend. At this time, the power generation fan blade 104 stops rotating, and the gate plate 301 will not descend either. It is necessary to manually reset the gate plate 301 to ensure the safety of the equipment. At this time, the water flows from the water inlet 309 into the drainage channel 312 and finally discharges from the water discharge opening 302 for flood discharge.

[0048] The working principle of a multifunctional hydroelectric power generation device disclosed in the present invention is as follows: Water flows into the upper end of the water inlet pipe 102, and then the water passes through the power generation fan blades 104, driving the power generation fan blades 104, the rotor 107 and the coil 108 to rotate. Thus, electricity is generated through the relative movement between the coil 108 and the magnetic pole 106. At the same time, the heat energy generated by the rotation of the rotor 107 is transmitted through the heating pipe 109. When water enters the water inlet pipe 102, the water drives the rotating impeller 206 and the impeller gear 207 to rotate, drives the upper gear 210 and the toothless gear 211 to rotate through the transmission belt 208. The toothless gear 211 drives the outer gear 214 engaged with the toothless gear 211 to rotate intermittently, thereby driving the inner gear 215 to rotate intermittently, and then driving the inner tooth ring 212 and the counting wheel 209 of the metering module near the toothless gear 211 to rotate intermittently. The outer gear 214 and the inner gear 215 of the next metering module are driven to rotate intermittently through the inner toothless gear 213, thereby driving the inner tooth ring 212 and the counting wheel 209 of the next metering module to rotate intermittently. Finally, the four counting wheels 209 are driven to rotate. The farther the counting wheel 209 is from the upper gear 210, the lower the rotation frequency, and the closer the counting wheel 209 is to the upper gear 210, the higher the rotation frequency. The water flow rate is recorded through the rotation of the four counting wheels 209. The upper filter plate 201 and the lower filter plate 202 can allow water to pass through and block the sediment. The blocked sediment will remain and accumulate on the downward slope block 203. As the sediment accumulates, the downward slope block 203 gradually descends along the water inlet pipe 102, and the downward compression spring 204 is compressed. Finally, the sediment is discharged into the sediment collection pool 205. The sediment content can be calculated according to the scale of the counting wheel 209 and the sediment volume in the sediment collection pool 205. When the power generation fan blades 104 rotate, they will drive the runner 303 to rotate. Thus, under the action of centrifugal force, the centrifugal rod 304 moves outward relative to the runner 303, and the inner spring 305 is stretched. The jacking rod 306 and the upper rack 307 are jacked up through the centrifugal rod 304. The faster the power generation fan blades 104 rotate, the more the jacking rod 306 and the upper rack 307 rise. The upper rack 307 drives the lower rack 308 and the gate plate 301 to rise through multi-stage gear transmission. The rising of the gate plate 301 will block the water inlet pipe 102. Thus, the water flow rate entering the water inlet pipe 102 is adjusted according to the rotation speed of the power generation fan blades 104. When the gate plate 301 rises to the highest point, the upper end of the water inlet pipe 102 will be completely closed. At this time, the gate plate 301 leaves the outside of the ejector plate 310, and the torsion spring 311 rebounds, causing the ejector plate 310 to eject to reach the lower end of the gate plate 301 and support the gate plate 301. Since the ejector plate 310 cannot rotate relative to the dam 101 any further, the gate plate 301 cannot descend. At this time, the power generation fan blades 104 stop rotating, and the gate plate 301 will not descend either. Manual reset of the gate plate 301 is required to ensure the safety of the equipment. At this time, water flows into the drainage channel 312 from the water inlet 309 and finally discharges from the water discharge port 302 for flood discharge.

[0049] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope of the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A multifunctional hydroelectric power generation device, comprising a power generation mechanism for generating power, characterized in that: The power generation mechanism comprises a dam (101), and a sediment mechanism for isolating and measuring sediment, and a flow mechanism for regulating water flow are arranged on the power generation mechanism; The power generation mechanism comprises four water inlet pipes (102) fixedly mounted on the dam (101), and power generation blades (104) are rotatably mounted in the water inlet pipes (102).

2. A multifunctional hydroelectric power generation device according to claim 1, characterized in that: The power generation mechanism further comprises a power generation shell (103) fixedly mounted on the water inlet pipe (102), a stator (105) fixedly mounted in the power generation shell (103), a magnetic pole (106) fixedly mounted on the stator (105), a rotor (107) fixedly mounted on the power generation blades (104), and a coil (108) fixedly mounted on the rotor (107).

3. A multifunctional hydroelectric power generation device according to claim 2, characterized in that: A heating pipe (109) is rotatably mounted inside the rotor (107), and the heating pipe (109) is used to remove heat generated by the rotation of the rotor (107).

4. A multifunctional hydroelectric power generation device according to claim 1, characterized in that: The sediment mechanism comprises an upper filter plate (201) and a lower filter plate (202) fixedly mounted at the lower end of a water inlet pipe (102); a downward pressure slope block (203) is slidably mounted in the water inlet pipe (102); a downward pressure spring (204) is arranged between the downward pressure slope block (203) and the water inlet pipe (102); a sand collecting pool (205) is arranged below the water inlet pipe (102); and a slope is arranged on the downward pressure slope block (203).

5. A multifunctional hydroelectric power generation device according to claim 4, characterized in that: A rotating impeller (206) is rotatably mounted in the water inlet pipe (102), an impeller gear (207) is fixedly mounted on the rotating impeller (206), an upper gear (210) is rotatably mounted on the water inlet pipe (102), a toothless gear (211) is fixedly mounted on the upper gear (210), and a transmission belt (208) is wound around the upper gear (210) and the impeller gear (207).

6. A multifunctional hydroelectric power generation device according to claim 5, characterized in that: Four metering modules are arranged on the water inlet pipe (102), and the metering modules include a counting wheel (209) rotatably mounted on the water inlet pipe (102), an inner toothed gear (213) and an inner gear ring (212) being fixedly mounted on the counting wheel (209), three outer gears (214) rotatably mounted on the water inlet pipe (102), inner gears (215) being fixedly mounted on the outer gears (214), the inner gears (215) meshing with the inner gear ring (212), and a scale being arranged on the counting wheel (209).

7. A multifunctional hydroelectric power generation device according to claim 6, characterized in that: The outer gear (214) of the metering module located next to the toothless gear (211) meshes with the toothless gear (211), and the outer gears (214) of the remaining three metering modules mesh with the inner toothless gears (213) of adjacent metering modules.

8. The multifunctional hydroelectric power generation device according to claim 1, characterized in that: The flow mechanism comprises a rotor (303) fixedly mounted on a power generation fan blade (104); a plurality of centrifugal rods (304) are slidably mounted on the rotor (303); an inner spring (305) is arranged between the centrifugal rods (304) and the rotor (303); a jacking rod (306) is slidably mounted on the dam (101); an upper rack (307) is fixedly mounted on the jacking rod (306); a gate plate (301) is slidably mounted on the dam (101); a lower rack (308) is fixedly mounted on the gate plate (301); when the upper rack (307) rises, the lower rack (308) is driven to rise through gear transmission.

9. A multifunctional hydroelectric power generation device according to claim 8, characterized in that: A drainage channel (312) is provided in the dam (101), a water discharge port (302) is provided on the dam (101), the drainage channel (312) is communicated with the water discharge port (302), the water discharge port (302) is connected to an external drainage pipe, a water inlet (309) is provided on the dam (101), the water inlet (309) is communicated with the drainage channel (312), a plurality of pop-up plates (310) are rotatably mounted on the dam (101), a torsion spring (311) is provided between the pop-up plate (310) and the dam (101), and when the gate plate (301) is not raised, the gate plate (301) is located outside the pop-up plate (310), the torsion spring (311) is in a twisted state, and the water inlet (309) is blocked by the gate plate (301).

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