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CN-121976905-A - Diversion type tidal power generation system

CN121976905ACN 121976905 ACN121976905 ACN 121976905ACN-121976905-A

Abstract

The invention discloses a diversion type tidal power generation system, which relates to the technical field of tidal power generation and comprises a water delivery assembly, a kinetic energy conversion assembly, an energy storage power generation device and a monitoring assembly, wherein the water delivery assembly comprises a main pipe and a branch pipe section, the main pipe is fixed on a bank dike, the axis of the main pipe is parallel to the axis of the bank dike, the branch pipe section comprises a first branch pipe, a second branch pipe and a third branch pipe, the first branch pipe, the second branch pipe and the third branch pipe are respectively provided with a guide wall section, an inlet gradual change section and a bent pipe section, the kinetic energy conversion assembly is used for converting the flow potential energy in the main pipe into kinetic energy, and the water delivery assembly comprises three parallel branch pipes, and the branch pipe sections are provided with asymmetric arc-shaped guide wall sections and inlet gradual change sections which are lengthened gradually, so that the flow impact route of water flow is met, the flow is captured and guided to a great extent while the energy loss is reduced, the flow rate and diversion efficiency of the flow is improved, the energy gathering is realized, and the power generation efficiency is further improved.

Inventors

  • ZHANG LINYU
  • ZHOU XING
  • CHENG LI
  • HUANG QUANSHUI

Assignees

  • 扬州大学

Dates

Publication Date
20260505
Application Date
20260319

Claims (9)

  1. 1. The diversion type tidal power generation system is characterized by comprising a water delivery assembly (1), a kinetic energy conversion assembly (2), an energy storage power generation device (3) and a monitoring assembly (4); the water delivery assembly (1) comprises a main pipe (11) and a branch pipe section (12), wherein the main pipe (11) is fixed on a bank dyke, the axis of the main pipe (11) is parallel to the axis of the bank dyke, the branch pipe section (12) comprises a first branch pipe (121), a second branch pipe (122) and a third branch pipe (123), and the first branch pipe (121), the second branch pipe (122) and the third branch pipe (123) are respectively provided with a guide wall section (13), an inlet gradual change section (14) and a bent pipe section (15); The kinetic energy conversion assembly (2) is used for converting water flow potential energy in the main pipe (11) into kinetic energy, the kinetic energy conversion assembly (2) comprises guide vanes (21) and a rotating wheel (22), the guide vanes (21) are arranged on the inner wall of the main pipe (11), one end, far away from the branch pipe section (12), of the main pipe (11) is connected with a bent drain pipe (111), a guide bearing (25) is arranged at the joint of the main pipe (11) and the bent drain pipe (111), a first main shaft (24) is connected with the guide bearing (25) in a sealing penetrating and rotating mode, and one end of the first main shaft (24) located in the main pipe (11) is coaxially connected with the rotating wheel (22) through a first main shaft flange (23). The energy storage power generation device (3) is connected with the outer end of the first main shaft (24) and is used for converting kinetic energy into electric energy; The monitoring assembly (4) comprises a flowmeter (41), a pressure sensor (42), a dynamic torque sensor (43), a rotating speed sensor (44), an exhaust port (45) and a terminal control system (46), wherein the terminal control system (46) is used for receiving data signals of the sensors, performing big data monitoring and analysis, sending out an alarm under abnormal conditions and starting an emergency mode.
  2. 2. The water diversion type tidal power generation system according to claim 1, wherein the guide wall section (13) comprises a first guide wall (131) and a second guide wall (132), the first guide wall (131) and the second guide wall (132) are all arc-shaped concrete guide walls, and the curvature of the first guide wall (131) is larger than that of the second guide wall (132); The lengths of the second guide walls (132) of the first branch pipe (121), the second branch pipe (122) and the third branch pipe (123) are in equal difference increment, the first guide wall (131) of the second branch pipe (122) is connected with the starting point of the second guide wall (132) of the first branch pipe (121), and the first guide wall (131) of the third branch pipe (123) is connected with the starting point of the second guide wall (132) of the second branch pipe (122).
  3. 3. The water diversion type tidal power generation system according to claim 2, wherein the inlet gradual change section (14) comprises a concrete horn section (141) with a wide front part and a narrow rear part and a square rounding section (142), the upper part of the horn section (141) and side walls at two sides are horizontally arranged by adopting a contracted elliptic curve shape, a bottom plate is horizontally arranged, the characteristics of a city gate opening are shown, the outlet of the horn section (141) is connected with the inlet of the square rounding section (142), the inlet of the square rounding section (142) is a rectangular section, the outlet of the square rounding section (142) is a circular section, and the outlet of the square rounding section (142) is connected with the inlet of the curved pipe section (15).
  4. 4. The water diversion type tidal power generation system according to claim 3, wherein the bent pipe section (15) is an S-shaped columnar bent pipe, the outlets of the bent pipe sections (15) of the first branch pipe (121), the second branch pipe (122) and the third branch pipe (123) are connected with the main pipe (11) through steel branch pipes and are in a shape of Bu, and the angle range of Bu-shaped branch pipe clamps of the bent pipe section (15) and the main pipe (11) is 15-45 degrees; The utility model discloses a water heater, including curved drain pipe (111), bend pipe section (15), main pipe (11) are connected the position and are provided with the check valve for rivers only can follow branch pipe section (12) flow direction and be responsible for (11), the lower extreme outlet of crooked drain pipe (111) is provided with flap valve (112), flap valve (112) can rotate around the top rotation axis, and realizes that rivers can only outwards discharge from main pipe (11).
  5. 5. The water diversion type tidal power generation system according to claim 1, wherein the guide vane (21) comprises a guide vane outer ring (211) and a guide vane inner ring (214), the guide vane outer ring (211) is welded on the pipe wall of the main pipe (11) and is positioned between the third branch pipe (123) and the bent drain pipe (111), a plurality of first guide vanes (212) are connected between the guide vane outer ring (211) and the guide vane inner ring (214) in an annular array mode, the first guide vanes (212) are flush with the main pipe axis, a guide cone (215) is welded at one end of the guide vane inner ring (214) close to the third branch pipe (123), each first guide vane (212) is connected with a second guide vane (213) in a rotating mode away from the guide cone (215) through a rotating shaft (216), a torsion spring is arranged at the rotating connection position of the second guide vane (213) and the rotating shaft (216), the second guide vane (213) can rotate around the rotating shaft (216), under the elastic balance effect of the impact force of the water flow and the torsion spring, the self-adaptive deflection angle adjustment according to the tide intensity is realized, and the deflection angle is 0-15 degrees.
  6. 6. The water diversion type tidal power generation system according to claim 1, wherein the rotating wheel (22) comprises a hub (221), wing-shaped blades (223) and a water drainage cone (224), the first main shaft (24) is coaxially connected with the hub (221) through a first main shaft flange (23), the other end of the hub (221) is connected with the water drainage cone (224) through threads, and the wing-shaped blades (223) are installed on two sides of the hub (221) through the blade flanges (222).
  7. 7. The water diversion type tidal power generation system according to claim 1, wherein the energy storage power generation device (3) comprises a flywheel (31), a generator (34) and a thrust bearing (36), the flywheel (31) comprises a cylindrical rotor (311) formed by winding high-strength fibers, the rotor (311) is coaxially connected with a second main shaft (32) through a rotor flange (312), one end of the second main shaft (32) is coaxially connected with the outer end of the first main shaft (24), the generator (34) is arranged on a concrete platform expanding at the lower end of a dam, an input shaft of the generator (34) is coaxially connected with a third main shaft (35), one end of the second main shaft (32) far away from the first main shaft (24) is coaxially connected with the third main shaft (35) through a second main shaft flange, the thrust bearing (36) is arranged at the tail end of the third main shaft (35), and the flywheel (31) rotates together with the generator (34) through the second main shaft flange (32), the second main shaft flange (33) and the third main shaft (35).
  8. 8. The water diversion type tidal power generation system according to claim 1, wherein the flowmeter (41) is installed on the bent pipe section (15), monitors the flow rate of the incoming water flow in real time and transmits a flow rate signal to the terminal control system (46); the pressure sensor (42) is arranged on a one-way valve at the connection part of the bent pipe section (15) and the main pipe (11), when the pressure sensor (42) senses the pressure from the bent pipe section (15) to the main pipe (11), the valve is opened, and otherwise, the valve is closed; the dynamic torque sensor (43) is used for monitoring the torque of the rotating wheel (22) and transmitting real-time data to the terminal control system (46); the rotating speed sensor (44) is arranged on the flywheel (31), monitors the rotating speed of the flywheel (31) in real time and transmits data to the terminal control system (46).
  9. 9. The water diversion type tidal power generation system according to claim 1, wherein the exhaust port (45) is a capped cylindrical pipe connected with a water flow sensor and is arranged at the upper part of the bent pipe section (15).

Description

Diversion type tidal power generation system Technical Field The invention relates to the technical field of tidal power generation, in particular to a diversion type tidal power generation system. Background The tidal energy is taken as a renewable clean energy source, has the advantages of strong regularity, high energy density and good predictability, and has wide application prospect in energy structure adjustment and carbon neutralization target background. At present, tidal power generation mainly utilizes the water level difference formed by tidal fluctuation to drive a hydroelectric generating set to work by constructing a tidal power station. However, the existing tidal power generation system still has the following technical problems in practical application that 1, the water diversion efficiency is low, the water diversion structure of the traditional tidal power generation system usually adopts a single water diversion channel or symmetrically arranged water diversion branch pipes, and the guiding capability of the traditional tidal power generation system on tidal water flow is limited. Because tidal water flow has directivity and volatility, a single water diversion channel is difficult to efficiently capture water flow under different tide level conditions, and symmetrically arranged water diversion branch pipes do not fully consider the distribution rule of water flow impact paths, so that partial branch pipes are insufficient in water inflow and uneven in water diversion flow distribution, the energy loss is large, the water flow entering a main pipe is limited, and the overall power generation efficiency is influenced. 2. The adaptive capacity to variable-working-condition water flow is insufficient, the water flow intensity of the tidal power generation system is changed regularly along with the period of tidal fluctuation, the water flow is smaller in the period of small tides, the guide vanes of the traditional fixed structure cannot effectively guide low-flow-rate water flow to form effective impact on the rotating wheel, so that the starting of a unit is difficult or the power generation efficiency is low, and when the water flow is larger in the period of large tides, the fixed guide vanes can cause water flow congestion again to form additional energy loss, so that the potential energy of high-head water flow cannot be fully utilized. For this reason, a water diversion type tidal power generation system is proposed. Disclosure of Invention The invention aims to solve the problems in the prior art, and provides a diversion type tidal power generation system. A diversion type tidal power generation system comprises a water delivery assembly, a kinetic energy conversion assembly, an energy storage power generation device and a monitoring assembly; The water delivery assembly comprises a main pipe and a branch pipe section, the main pipe is fixed on the bank dyke, the axis of the main pipe is parallel to the axis of the bank dyke, the branch pipe section comprises a first branch pipe, a second branch pipe and a third branch pipe, and the first branch pipe, the second branch pipe and the third branch pipe are respectively provided with a guide wall section, an inlet gradual change section and a bent pipe section; The kinetic energy conversion assembly is used for converting the water flow potential energy in the main pipe into kinetic energy, and comprises guide vanes and a rotating wheel, wherein the guide vanes are arranged on the inner wall of the main pipe, one end of the main pipe far away from the branch pipe section is connected with a bent drain pipe, a guide bearing is arranged at the joint of the main pipe and the bent drain pipe, a first main shaft is connected with the guide bearing in a sealing penetrating and rotating manner, and one end of the first main shaft positioned in the main pipe is coaxially connected with the rotating wheel through a first main shaft flange; The energy storage power generation device is connected with the outer end of the first main shaft and used for converting kinetic energy into electric energy; The monitoring assembly comprises a flowmeter, a pressure sensor, a dynamic torque sensor, a rotating speed sensor, an exhaust port and a terminal control system, wherein the terminal control system is used for receiving data signals of the sensors, monitoring and analyzing big data, sending out an alarm under abnormal conditions and starting an emergency mode. Preferably, the guide wall section comprises a first guide wall and a second guide wall, the first guide wall and the second guide wall are arc-shaped concrete guide walls, and the curvature of the first guide wall is larger than that of the second guide wall; the lengths of the second guide walls of the first branch pipe, the second branch pipe and the third branch pipe are increased in an equal difference mode, the first guide wall of the second branch pipe is connected with the second guide