CN2554228Y

CN2554228Y - Channel for fish swiming counter-flow through dam

Info

Publication number: CN2554228Y
Application number: CN01274779U
Authority: CN
Inventors: 张金生
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-28
Filing date: 2001-12-28
Publication date: 2003-06-04
Anticipated expiration: 2011-12-28

Abstract

The utility model relates to a special passage which can lead the river fish to pass through a dam in a counter flow. The utility model is a migratory fish ecological environmental protection facility in the water conservancy project. The river dam blocks the fish migration path and high water flow speed which is formed by a high fall can not lead the fish not to pass through a common culvert gate in the counter flow, so the dam project damages the ecological environment of fish breeding migration. The utility model makes use of the special passage which is constituted by a serially connected volute form, and then the high water flow speed which is formed by the high fall can generate a continuous reflux along a cavity wall when passing the passage, so as to form a huge flow resistance and fully reduce the water flow speed. The more gentle water flow speed can lead some rare fish to pass through the dam in the counter flow by the passage, so as to complete the migration and breeding. The appropriate position in the passage can be provided with a bright, a water outlet can be provided with a bait casting device and so on to guide the fish to pass through the passage, so as to lead the fish as much as possible to find the migration path.

Description

River Fish migration adverse current is crossed the dam passage

Affiliated technical field

The utility model relates to a kind of River Fish migration adverse current and crosses the dam passage, belongs to River Fish migration breeding ecology environmental protection and hydraulic engineering technical field.

Background technology

Constructing of hydraulic engineerings such as rivers dam blocked relying on migration to breed offspring's fish and the migration path of some other species (as white fine jade globefish).Though the passage between culverts such as the sluice upper and lower head that is dam, huge water level official post water velocity is too fast, and migratory fishes can't be sailed against the current.For making some treasure the unlikely extinction of fish, can only adopt the method for artificial breeding to protect these species at present.This mode by artificial breeding protection species is done something against one's will really.

Summary of the invention

Make in the culvert water velocity too fast in order to overcome high hydraulic pressure that drop huge between the upper and lower head of dam forms, migratory fishes can't upstream difficulty, the utility model has designed a kind of special water channel of the spiral case form of connecting especially, it can make the High-Pressure Water of high drop formation through this passage the time, produce the whirlpool that refluxes one by one along conduit wall, form huge flow resistance, thereby water velocity is fully reduced, fish can by this passage adverse current upwards be realized migrating.

The beneficial effects of the utility model are fully to reduce to connect the water velocity of conducting culvert between head up and down, make some rare fish thus the passage adverse current cross the dam, finish migration, breed the offspring.

Description of drawings

Fig. 1 is a longitudinal plan, and it has shown that building the interior River Fish migration adverse current of dam body in for one crosses the dam passage.

Fig. 2 is a water (flow) direction schematic diagram in the spiral case unit.

The most preferred embodiment explanation:

As shown in Figure 1, this is one build between rivers dam upstream and downstream, constructs the specific channel 2 of suitable passage section and suitable length series connection spiral case form by dam body 1.Generally, the formed huge hydraulic pressure of water-head can make the interior water velocity of water stream channel of common form be exceedingly fast fish 6 unable sailing against the current.And the special water channel of series connection volute form, it can make high speed that high drop forms, High-Pressure Water through this passage the time, produce the whirlpool that refluxes one by one along conduit wall, form huge flow resistance, enough passage lengths can fully reduce water velocity effectively, fish can by this passage adverse current upwards be realized migrating.

In order to make fish as much as possible be convenient to find this migration path, illumination system 3 (open channel does not need) and automatic bait thrower 4 can be set in the inside and outside appropriate location of passage, guide fish to pass through this passage with this.In addition, for the needs that overhaul, also should gate 5 be set at the passage water inlet.

This passage also can be constructed in massif, and when the height of water hour, this channels designs can also be become open channel.For back two kinds of forms, because its principle is identical, the expression of herein drawing no longer in addition.

Adopt the utility model can protect the River Fish ecological environment, rare fish migration path is not blocked, thereby avoids rare pisicicide.The offspring that fish breed in the upstream then both can pass through this passage, also can arrive the downstream by sluice or ship lock etc.

Claims

One kind construct hydraulic engineering up and down the River Fish migration adverse current between head cross the dam passage; It is characterized in that: with the vias inner walls of series connection worm frame form formation.
2. a River Fish migration adverse current according to claim 1 is crossed the dam passage; It is characterized in that: in the inside and outside fish migration inducible systems such as illumination, bait throwing in that are provided with of passage.
3. a River Fish migration adverse current according to claim 1 is crossed the dam passage; It is characterized in that: it promptly can be constructed in dam body, also can construct near the massif dam body; It promptly can be a culvert, hour also can be open channel at drop.