Step-by-step paired and up-down reciprocating combined fishway and fish passage method

A step-by-step paired and up-down reciprocating combined fishway, comprising several fishway units, a mechanical transmission system, a fish repelling system, a control system, and a recovery cableway,

• wherein the fishway units comprise bottom plates, wing walls, gear belts, sliding slots, sliders, grooves, curved followers, partition plates, and roller rows;
• each bottom plate is horizontally fixed above a corresponding one of the curved followers, the wing walls are vertically fixed to left and right sides of the bottom plates of the fishway, inner sides of the wing walls are provided with the gear belts, front ends of the wing walls are provided with the sliding slots, and rear ends of the wing walls are provided with the sliders;
• the wing walls of adjacent fishway units are in an embedment connection and in sliding engagement with each other through the sliding slots and the sliders;
• the curved followers are fixed on lower surfaces of the bottom plates, and the grooves are transversely formed in bottoms of the curved followers;
• the partition plates are vertically arranged at front and rear ends of the bottom plates of even-numbered fishway units, and are fixedly connected to the wing walls on the left and right sides thereof;
• the roller rows are horizontally fixed to inlets and outlets of odd-numbered fishway units, respectively, and bottoms of the roller rows are tangent to the bottom plates;
• the mechanical transmission system comprises eccentric wheels, a motor, and a transmission shaft;
• the eccentric wheels are of a cylindrical structure, are located directly under the curved followers and are in sliding contact with the grooves of the curved followers, and an outer surface of each eccentric wheel is provided with a curved slideway in which several balls are installed, and each eccentric wheel is provided with a shaft hole;
• and a rotating shaft of the motor is connected to the transmission shaft through a reduction gear set, the transmission shaft penetrates through the shaft holes of all eccentric wheels and is fixedly connected to the shaft holes;
• the fish repelling system comprises a driving device, a reel, a fish repelling net, a net pocket and a control system;
• the driving device comprises a driving motor, and a driving shaft and gears connected to the driving motor, and the gears are meshed with the gear belts;
• an upper end of the fish repelling net is fixed to the reel, and a lower end of the fish repelling net is fixed to the net pocket;
• a periphery frame of the net pocket is made of solid stainless steel, and the net pocket is in a shape of a dustpan full of small holes, the net pocket unfolds the fish repelling net by gravity of the net pocket, an open end of the net pocket is rectangular in shape, and a bottom of the open end of the net pocket is raised upwards;
• the control system is used to control operating states of the motor, the driving device, the reel, a driving wheel, a telescopic rod and a grapple;
• the recovery cableway comprises the driving wheel, a cable, a cable clamp, the telescopic rod, and the grapple;
• the driving wheel is a stainless steel cylinder with trenches on a surface of the cylinder, the cable is bound in the trenches of the driving wheel;
• the cable clamp is secured to the cable;
• the telescopic rod is able to extend and retract up and down, an upper end of the telescopic rod is connected to the cable clamp, and a lower end of the telescopic rod is connected to the grapple;
• and the grapple is able to be contracted and expanded freely.