CN-121986737-A - Migration fish carrying dam passing system

CN121986737ACN 121986737 ACN121986737 ACN 121986737ACN-121986737-A

Abstract

The invention discloses a migration fish carrying dam passing system which comprises two fish attracting slopes and two fish placing mechanisms, wherein one side of a river channel is also provided with a fish transporting mechanism, the top end of each fish attracting slope is provided with a transition section, one end of each transition section, which is far away from each fish attracting slope, is provided with a screening fish discharging assembly for screening fish sizes, each screening fish discharging assembly comprises a mounting frame, a fish discharging plate and a fixing plate, the fixing plates are fixedly arranged on the mounting frame, each fixing plate is provided with a containing notch for containing the fish discharging plate, the inner wall of each containing notch is provided with a containing groove for containing the fish discharging plate to extend in or extend out, and the fish discharging plates are arranged in the containing grooves in a sliding mode. According to the invention, the fish attracting assembly can effectively attract the migration fishes into the transport mechanism, so that the migration fishes are assisted to transport, the migration and spawning are facilitated, and the gap between the movable fish feeding plate and the mounting frame is opened, so that the local fishes with smaller volumes are screened, and the local fishes stay in the area where the local fishes are located.

Inventors

PAN YUNWEN
LI ZONGJUN
LI HUOKUN
HUANG WEI
LIU BO
ZHONG XUAN
PENG JINZHEN

Assignees

南昌大学

Dates

Publication Date: 20260508
Application Date: 20260204

Claims (10)

1. The migration fish carrying dam passing system is characterized by comprising two fish attracting slopes which are respectively arranged at the upstream and downstream of a dam and two fish placing mechanisms which are respectively arranged at the upstream and downstream of the dam, wherein one side of a river channel is also provided with a fish transporting mechanism; The fish attracting slope is positioned at one side of the river course, the fish attracting slope is obliquely arranged from top to bottom towards one side of the river course, the bottom end of the fish attracting slope stretches into the river course, the top end of the fish attracting slope is provided with a transition section, the transition section is obliquely arranged from top to bottom towards the fish attracting slope direction, the gradient of the transition section is smaller than that of the fish attracting slope, one end of the transition section, which is far away from the fish attracting slope, is provided with a screening fish separating component for screening fish, the fish separating component is positioned above the fish transporting mechanism, the transition section is provided with a fish attracting component, The screening fish subassembly includes the mounting bracket, fish plate and fixed plate down, the fixed setting of fixed plate is on the mounting bracket, be equipped with on the fixed plate and be used for holding down fish plate hold the breach, be equipped with on holding the breach inner wall and be used for holding down fish plate stretches into or stretches out the holding tank, fish plate slip down set up in the holding tank, the holding tank inner wall with be connected with the spring that the level set up down between the fish plate, fish plate down with the mounting bracket laminating, the bottom interval of mounting bracket is equipped with two fixed blocks, two periodic slip is equipped with the drive plate between the fixed block, the drive plate orientation down fish plate's one end is equipped with a plurality of drive heads, the drive head orientation fish plate's one end is equipped with the toper arch down, the arch can stretch into a plurality of fish plate down between the clearance and with fish plate butt down, fish plate orientation down the below of one end of mounting bracket is equipped with and supplies the transmission breach that the arch stretched into.
2. The system of claim 1, wherein the fish attracting assembly comprises a water pump and a water outlet pipe, wherein the transition section is provided with a plurality of water outlets, the water outlet is provided with a water outlet pipe, one end of the water outlet pipe facing the water outlet is provided with a first filter screen, the water pump is arranged in a river channel, the water pump is communicated with the water outlet pipe, the water outlet end of the water pump is connected with a water inlet pipe, and the water inlet pipe is connected with a plurality of water outlet pipes through a fork pipe and is communicated with each other.
3. The system of claim 2, further comprising a cam, a drive shaft and an output shaft, wherein the cam is rotatably disposed below the drive plate, the cam is rotatable to abut against the drive plate, the drive shaft is rotatably connected with the fixed block, the drive shaft is coaxially connected with the cam, the drive shaft is in driving connection with the output shaft, the output shaft is disposed at the bottom end of the transition section, a water wheel is disposed on the output shaft, and the water wheel is disposed in the water inlet pipe.
4. A system for transporting and passing a dam for a swimming fish according to claim 3, wherein the fixing plate is rotatably provided with a mounting shaft, the top end of the mounting shaft is provided with a fish driving fan, the bottom end of the mounting frame is rotatably provided with a fixing shaft, the fixing shaft is vertically arranged with the mounting shaft and is in transmission connection with the mounting shaft through a bevel gear set, and the fixing shaft is in transmission connection with the output shaft of the transmission shaft.
5. The system of claim 1, wherein the fish-holding assembly comprises a fish-holding slope disposed on one side of the channel, wherein the fish-holding slope is disposed parallel to the fish-attracting slope, wherein the fish-holding slope is disposed obliquely from top to bottom toward the channel, wherein the bottom end of the fish-holding slope extends into the channel, and wherein the upper end of the fish-holding slope is disposed below the fish-holding mechanism.
6. The system of claim 5, wherein the fish transport assembly comprises a track and a transport assembly, the track being disposed on one side of the channel and on a side of the fish attracting slope away from the channel, the tracks being connected end to end, the transport assembly being slidably disposed on the track, the transport assembly being movable to below the downhill slope, the transport assembly being movable to above the fish releasing slope.
7. The system of claim 6, wherein the transport assembly comprises a fish carrier, the fish carrier is slidably disposed on the track, a fish inlet is disposed above the fish carrier, a fish outlet is disposed on one side of the fish carrier facing the river channel, a chute communicated with the fish outlet is disposed at the fish outlet, a valve for sealing the fish outlet is slidably disposed at the fish outlet, the valve can move downward to abut against a bottom wall of the fish outlet to seal the fish outlet and the chute, the chute can move to be located above the fish slope, the fish outlet can move to be located above the fish slope, a water outlet is disposed on an inner wall of the fish carrier, and a second filter screen is disposed at the water outlet.
8. The system of claim 7, further comprising a motor, a first bevel gear, a second bevel gear and a screw, wherein the upper end of the fish carrier is provided with a first through hole through which the fish outlet is communicated with each other, the motor is arranged at the top end of the fish carrier and is fixedly connected with the output shaft of the motor and the first bevel gear coaxially, the second bevel gear is rotatably connected with the top end of the fish carrier, an inner thread is arranged on an inner hole of the second bevel gear, the screw is rotatably arranged at the top end of the valve, the top end of the screw penetrates through the first through hole and the inner hole of the second bevel gear, and the screw is in threaded connection with the inner thread.
9. A migration fish carrying over dam system according to claim 7, wherein a fish blocking grating is provided between said fish attracting slope and the dam downstream, said fish blocking grating having a watertight section at an end thereof facing said fish attracting slope.
10. A migration fish carrying over dam system according to claim 7, wherein said inlet is tapered from top to bottom.

Description

Migration fish carrying dam passing system Technical Field The invention relates to the technical field of hydraulic engineering, in particular to a system for transporting migration fishes through a dam. Background Migration is periodic and large-scale directional migration behavior of fish along a fixed route in a certain period due to the requirements of propagation, bait rope, overwintering and the like. Many wild fishes in China also have migration habits, such as Acipenser sinensis, salmon, hilsa herring and the like. With the development of national economy, the demand of the whole society for electric power continuously rises, and the country has to build a dam on a plurality of rivers to generate electricity. The construction of the dam blocks the migration path of the migration fish, seriously threatens the population survival of the fish, and greatly damages the river ecosystem. In order to solve the contradiction between the power generation of the dam and the migration of fishes, hydraulic engineers design various fishways to guide the fishes to pass through the dam, but the problems still exist, such as (1) when the dam height is large, the existing fishway flow path is designed to be longer in order to reduce the flow velocity, which is easy to enable the fishes with weaker physical energy to be flushed back to the downstream due to the physical weakness in the countercurrent migration process, (2) when the flow velocity is reduced, the existing fishway flow path is mostly in the form of gentle turning and bending, the accurate guiding of the fishes cannot be carried out, so that the fishes cannot find an entrance or stay in the fishway for a long time, and (3) under certain water levels, the entrance of the fishway is possibly exposed out of the water surface or submerged too much, the function of the fishes fails, and (4) the fishway is easy to be blocked by sundries, manual regular inspection and cleaning is too time-consuming and labor-consuming. Disclosure of Invention Object of the invention In order to solve the technical problems in the background art, the invention provides the migration fish carrying dam passing system, wherein the migration fish can be effectively attracted into a conveying mechanism through a fish attracting assembly, so that the migration fish is assisted to be transported, the migration fish can conveniently make eggs, and the gap between a movable fish feeding plate and a mounting frame is opened, so that the local fish with smaller volume is screened, and stays in the area where the local fish is located, and the ecological environment at the upstream and downstream of a dam is ensured not to be influenced. (II) technical scheme The invention provides a migration fish carrying dam passing system, which comprises two fish attracting slopes respectively arranged at the upstream and downstream of a dam and two fish placing mechanisms respectively arranged at the upstream and downstream of the dam, wherein one side of a river channel is also provided with a fish transporting mechanism; The fish attracting slope is arranged at one side of the river course, the fish attracting slope is obliquely arranged from top to bottom towards one side of the river course, the bottom end of the fish attracting slope stretches into the river course, the top end of the fish attracting slope is provided with a transition section, the transition section is obliquely arranged from top to bottom towards the fish attracting slope direction, the gradient of the transition section is smaller than that of the fish attracting slope, one end of the transition section, far away from the fish attracting slope, is provided with a screening fish-separating component for screening fish, the fish-separating component is arranged above the fish transporting mechanism, the transition section is provided with the fish attracting component, The screening fishing assembly comprises a mounting frame, a fishing plate and a fixing plate, wherein the fixing plate is fixedly arranged on the mounting frame, an accommodating notch for accommodating the fishing plate is formed in the fixing plate, an accommodating groove for accommodating the fishing plate to stretch into or stretch out is formed in the inner wall of the accommodating notch, the fishing plate is slidably arranged in the accommodating groove, a spring horizontally arranged is connected between the inner wall of the accommodating groove and the fishing plate, the fishing plate is attached to the mounting frame, two fixing blocks are arranged at intervals at the bottom end of the mounting frame, a transmission plate is periodically slidably arranged between the two fixing blocks, a plurality of transmission heads are arranged at one end of the transmission plate facing the fishing plate, conical protrusions are arranged at one end of the transmission heads facing the fishing plate, the protrusions can stretch into gaps of the fishing plate and a