An automatically opening and closing fishway outlet gate

Abstract

The utility model relates to an automatic fishway outlet gate, belonging to the field of hydraulic engineering. It comprises a floating gate, a gate shaft, a water seal, an inner baffle, a bottom half-barrel-shaped floating body; the bottom half-barrel-shaped floating body comprises a half-barrel and a plane sealing the barrel; a flat door is connected to the plane, and a door-closing floating box is welded to the top outer side of the flat door; the floating gate is fixed to the gate shaft and rotates around the gate shaft; the water seal is fixed to the inner baffle of the floating gate, the inner baffle is welded to the arc surface of the bottom half-barrel-shaped floating body, and an outer baffle is arranged on the outer side. The utility model has the beneficial effects of providing flow rate shielding for fish swimming out of the fishway, increasing the fish passing period, and being simple and easy to automatically schedule, thereby avoiding water leakage.

Description

TECHNICAL FIELD

[0001] The application discloses an automatically opened and closed fishway outlet gate, which is used for fish passing facilities construction of water conservancy and hydropower engineering and belongs to the field of water conservancy engineering environmental protection. BACKGROUND

[0002] The fishway is an important facility for connecting the fish migration route, and plays an irreplaceable important role in connecting the fish migration route on a low water head water conservancy hub and is one of the key contents of the ecological protection and restoration technology of water conservancy engineering. According to the Design Guidelines for Fishway of Water Conservancy and Hydropower Engineering (SL 609-2013), when the water level of the upstream varies greatly in the main fish passing season, multiple fishway outlets at different positions and elevations should be arranged. According to Fish passes-Design, dimensions and monitoring published by the Food and Agriculture Organization of the United Nations, the fishway outlet should be designed as a vertical slit type, and multiple outlets should be arranged if the water level variation is greater than 1 m. There are a large number of reservoirs in China, and the water level variation of some reservoirs affected by daily regulation of power stations reaches more than 10 meters. Such a huge water level variation brings great difficulties to the design of the fishway outlet. If the conventional design is adopted, the fishway outlet will be more than 10, which is very difficult from the aspects of design and management. How to adopt a design to meet the variation of the upstream water level has been the direction of exploration of the technical personnel in the field.

[0003] The upstream outlet of the fishway is also the inlet of the water flow in the fishway. When the upstream water level frequently changes, especially when the variation is greater than the depth of the fishway, the fishway inlet needs to be scheduled by a gate. Frequent water level variation will bring great difficulty to the scheduling of the gate. According to the water level, a water level sensor is usually installed and connected with the operating device of the gate. However, the gate of the fishway is usually scheduled separately from other gates because it does not involve flood control and power generation. The gate is usually an independent small gate. At this time, the scheduling mode of the water level sensor and the operating device of the gate is usually increased in cost and uncertainty.

[0004] The traditional flat door or arc door is gradually opened from the bottom to the top. When the gate is in a half-open state for controlling the flow, the flow rate between the door and the gate bottom plate is high, and it is difficult for the fish to swim upstream through the flow rate area. The fishway needs a new type of gate to make the water flow into the fishway not too high and to have a certain shielding effect on the fish. SUMMARY

[0005] The application discloses an automatically opened and closed fishway outlet gate, which is used for fish passing facilities construction of water conservancy and hydropower engineering and belongs to the field of water conservancy engineering environmental protection.

[0006] The specific technical scheme is:

[0007] An automatic fishway outlet gate, comprising: a floating gate, a gate shaft, a water seal, an inner baffle, and a bottom half-barrel-shaped floating body;

[0008] The bottom half-barrel-shaped floating body comprises a half-barrel and a flat surface closing the half-barrel; a flat door is connected to the flat surface, and a closing door floating box is welded to the top outer side of the flat door; the floating gate is fixed on the gate shaft and rotates around the gate shaft; and the water seal is fixed on the inner baffle of the floating gate.

[0009] The inner baffle is welded to the arc surface of the bottom half-barrel-shaped floating body, and an outer baffle is arranged on the outer side of the inner baffle; the inner baffle provides a positive pressure for the water seal to limit water leakage; and the inner baffle and the water seal jointly seal the gap at the bottom of the gate when the gate is closed.

[0010] When the water level drops to the opening water level of the floating gate, a rotating torque is formed on the floating gate under the gravity of the closing door floating box; at this time, the bottom of the floating gate is turned upward and inward, and is clamped at the position of the outer baffle of the bottom frame; and the floating gate is in a horizontal open state.

[0011] When the water level rises to the closing water level of the floating gate, a rotating torque is formed on the floating gate under the buoyancy of the closing door floating box; at this time, the bottom of the floating gate is turned outward and downward, and is clamped at the position of the inner baffle of the bottom frame; and the floating gate is in a vertical closed state.

[0012] The closing door floating box is internally provided with a bidirectional water pump and an air pipe and a water pipe.

[0013] The bottom half-barrel-shaped floating body is connected to the closing door floating box through the air pipe and the water pipe.

[0014] The water pipe is provided with a gravity hose at the end thereof; and the gravity hose is always vertically positioned at the lowest position under the action of gravity.

[0015] If the gate cannot be opened when the water level drops to the opening water level of the floating gate, the bidirectional water pump pumps water from the bottom half-barrel-shaped floating body into the closing door floating box; the water flows into the closing door floating box, thereby increasing the weight and torque of the closing door floating box and pushing the gate to open.

[0016] If the gate cannot be closed when the water level rises to the closing water level of the floating gate, the bidirectional water pump pumps the water in the closing door floating box into the bottom half-barrel-shaped floating body; the water gravity of the bottom half-barrel-shaped floating body and the buoyancy of the closing door floating box jointly make the gate vertical, and further push the gate to close.

[0017] The bottom angle of the closing door floating box close to the gate is an acute angle, and the angle range is 52°<A<90°.

[0018] When multiple gates are located at different elevations, different water levels will open different fishway water-filled float gates. This allows water at different elevations to flow into the fishway.

[0019] The beneficial effects of the present application are: 1. The design of the gate bottom half-barrel-shaped float body provides flow rate shielding for fish swimming out of the fishway;

[0020] 2. The fishway gate opening and closing control greatly reduces the difficulty of gate scheduling;

[0021] The fishway at a certain water level automatically opens the gate at the corresponding height, and the underwater gate is closed, ensuring

[0022] the stability and continuity of fishway water inflow and fish outflow;

[0023] 3. The design of the closed door floating box improves the opening and closing force of the gate, and in combination with the design of the water seal, effectively avoids water leakage causing water flow chaos in the downstream fishway when the gate is closed.

[0024]

[0025] DRAWINGS

[0026] Figure 1 The fishway self-opening and closing gate profile diagram in the present application;

[0027] Figure 2 The fishway self-opening and closing gate profile diagram in the present application;

[0028] Figure 3 The bottom angle A position diagram of the closed door floating box in the present application.

[0029] Figure 4 The opening and closing state of the gate when the fishway at high water level does not pass fish;

[0030] Figure 5 The opening and closing state of the gate when the fishway at high water level does not pass fish;

[0031] Figure 6 The opening and closing state of the gate when the fishway at high water level does not pass fish;

[0032] Figure 7 The opening and closing state of the gate when the fishway at high water level does not pass fish.

[0033] S is the inner water surface. DETAILED DESCRIPTION

[0034] The present application will be further described with reference to the accompanying drawings.

[0035] Example 1 ​

[0036] An automatic fishway outlet gate, comprising: a floating gate 51, a gate shaft 52, a water seal 53, an inner baffle 54, and a bottom half-barrel-shaped floating body 55;

[0037] The bottom half-barrel-shaped floating body 55 comprises a half-barrel and a flat surface closing the half-barrel; a flat door is connected to the flat surface, and a closing door floating box 59 is welded to the top of the flat door; the floating gate 51 is fixed on the gate shaft 52 and rotates around the gate shaft 52; and the water seal 53 is fixed on the inner baffle 54 of the floating gate 51.

[0038] The inner baffle 54 is welded to the arc surface of the bottom half-barrel-shaped floating body 55, and an outer baffle 56 is arranged outside the inner baffle 54; the inner baffle 54 provides a positive pressure for the water seal 53 to limit water leakage of the water seal 53; and the inner baffle 54 and the water seal 53 jointly seal the gap at the bottom of the gate when the gate is closed.

[0039] When the water level drops to the opening water level of the floating gate 51, the floating gate 51 forms a rotating torque under the gravity of the closing door floating box 59, at this time, the bottom of the floating gate 51 is turned inward and upward, and is clamped at the position of the outer baffle 56 of the bottom door frame, and the floating gate is in a horizontal open state;

[0040] When the water level rises to the closing water level of the floating gate 51, the floating gate forms a rotating torque under the buoyancy of the closing door floating box 59, at this time, the bottom of the floating gate is turned downward and outward, and is clamped at the position of the inner baffle 54 of the bottom door frame, and the floating gate is in a vertical closed state.

[0041] The closing door floating box 59 is internally provided with a bidirectional water pump 57 and an air pipe 592, and a water pipe 593;

[0042] The bottom half-barrel-shaped floating body 55 is connected to the closing door floating box 59 through the air pipe 592 and the water pipe 593;

[0043] The water pipe 593 is provided with a gravity hose 594 at the end thereof, and the gravity hose 594 is always vertically positioned at the lowest position under the gravity;

[0044] If the gate cannot be opened when the water level drops to the opening water level of the floating gate, the bidirectional water pump 57 pumps water from the bottom half-barrel-shaped floating body 55 into the closing door floating box 59, and the water flows into the closing door floating box 59, thereby increasing the weight and torque of the closing door floating box 59 and pushing the gate to open;

[0045] If the gate cannot be closed when the water level rises to the closing water level of the floating gate, the bidirectional water pump 57 pumps water in the closing door floating box 59 into the bottom half-barrel-shaped floating body 55, and the water gravity of the bottom half-barrel-shaped floating body 55 and the buoyancy of the closing door floating box 59 jointly make the gate vertical and further push the gate to close.

[0046] The bottom angle of the door float 59 near the gate side is an acute angle, and the angle range is 52°<A<90°.

[0047] When multiple gates are located at different elevations, different water levels will open different fishway water-filled float gates. So that the water at different elevations flows into the fishway.

Claims

1. An automatically opening and closing fishway outlet gate, characterized by: The utility model relates to a fishway outlet gate structure, which comprises a flat door, a door shaft, a water seal, an inner baffle and a bottom half-barrel-shaped floating body; the bottom half-barrel-shaped floating body comprises a half-barrel and a flat surface closing the half-barrel; the flat door is connected to the flat surface, the top outer side of the flat door is welded with a door closing floating box, the flat door is fixed on the door shaft and rotates around the door shaft; the water seal is fixed on the inner baffle. The inner baffle is welded on the arc surface of the bottom half-barrel-shaped floating body, and the outer side of the flat surface closing the half-barrel is provided with an outer baffle; the inner baffle provides positive pressure for the water seal and limits water leakage of the water seal; the inner baffle and the water seal jointly seal the gap at the bottom of the gate when the gate is closed. When the water level drops to the gate opening water level of the fishway outlet gate, the fishway outlet gate forms a rotating torque under the action of the gravity of the door closing floating box, at this time, the bottom of the fishway outlet gate is turned upward and inward and is clamped at the position of the outer baffle, and the fishway outlet gate is in a horizontal open state; when the water level rises to the gate closing water level of the fishway outlet gate, the fishway outlet gate forms a rotating torque under the action of the buoyancy of the door closing floating box, at this time, the bottom of the fishway outlet gate is turned downward and outward and is clamped at the position of the inner baffle, and the fishway outlet gate is in a vertical closed state. The door closing floating box is internally provided with a bidirectional water pump, an air pipe and a water pipe; the bottom half-barrel-shaped floating body is connected with the door closing floating box through the air pipe and the water pipe; the end of the water pipe is provided with a gravity hose which is always vertically positioned at the lowest position under the action of gravity. When the water level drops to the gate opening water level, the gate cannot be opened, then the bidirectional water pump pumps water from the bottom half-barrel-shaped floating body into the door closing floating box, the water flows into the door closing floating box, the weight and the torque of the door closing floating box are increased, and the gate is pushed to be opened; when the water level rises to the gate closing water level, the gate cannot be closed, then the bidirectional water pump pumps the water in the door closing floating box into the bottom half-barrel-shaped floating body, the water gravity of the bottom half-barrel-shaped floating body and the buoyancy of the door closing floating box jointly make the gate vertical, and further push the gate to be closed. The bottom angle of the door closing floating box close to the gate side is an acute angle A, and the angle range is 52° 2. The self-opening and closing fishway outlet gate according to claim 1, characterized in that: ​

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