CN205475130U - Fishway returns screwing in and rises section rest pond - Google Patents

Abstract

The utility model relates to a fishway structure discloses a fishway returns screwing in and rises section rest pond, can eliminate back screwing in rises at section rest pond and in the mainstream too concentrate near outside wall face on, and there is the unfavorable flow state of great recirculation region in near interior side wall wall. The low reaches pond room import dividing pier that includes outside wall, interior side wall, is located the head bay room export dividing pier of importing in the rest pond and be located rest cell -out mouth, be equipped with the pier nose baffle on the head bay room export dividing pier, outside wall turn through at fishway returns screwing in and rises section rest pond sets up the baffling mound perpendicularly to deflecting the outside side wall direction of pier nose baffle, making the rivers flow that gets into the district that turns from the head bay room receive the hindrance, so as to lets the mainstream diffusion deceleration that concentrates on near outside wall face, and near the backward flow in side wall wall in reducing makes that flow state in the fishway returns screwing in and rises section rest pond is regular, the velocity of flow reduces, is favorable to the rest of fish and traces back.

Description

A kind of fish pass convolution ascent stage rest pond

Technical field

This utility model relates to a kind of fish channel structure, especially a kind of fish pass convolution ascent stage rest pond.

Background technology

Fish pass, as a kind of important job facilities protected the fish resources, is favored by hydraulic engineering design person always, but along with increasingly The appearance in the big storehouse of many high dams, fish pass drop is increasing, in order to slow down gradient, reduces the difficulty that Fish are traced back, usually through setting Roundabout type fish pass realizes.Additionally, limited by topographic and geologic condition, fish pass engineering is set up and puts in half-turn, avoid not The arrangement condition of profit.And fish pass is turned and main flow often can be caused to concentrate on side, then there is certain backflow in opposite side, when corner is excessive Time, this phenomenon becomes apparent from, and is unfavorable for that Fish have a rest and trace back, it is therefore desirable to arrange rectification measure in turnaround section, energy dissipating and Rectification is the key point of fish pass rest pond design, if but method is improper, then and can deteriorate fluidised form, not have the effect of energy dissipating and rectification Really.

Utility model content

Technical problem to be solved in the utility model is: provide a kind of fish pass convolution ascent stage rest pond, it is possible to eliminate in convolution Rise main flow in section rest pond excessively to concentrate near the wall surface of outside, and near inner edge wall surface, there is the unfavorable stream of bigger recirculating zone State.

A kind of fish pass convolution ascent stage rest pond, bag is the technical scheme is that by solving above-mentioned technical problem this utility model Include outer abutment wall, interior abutment wall, be positioned at the head bay room outlet dividing pier of rest pond import and be positioned at the downstream bath room import of rest pond outlet Dividing pier, described head bay room outlet dividing pier is provided with pier nose guide plate；Also include that baffling pier, described baffling pier are vertically set on outside The medial surface of wall turnaround section, the pier nose of baffling pier is provided with guide plate.

Further: described pier nose guide plate outside abutment wall direction deflects 15 °～20 °.

Further: described baffling pier and interior abutment wall are positioned at the corner flush of upstream.

Further: about 1/2nd of a length of head bay room width of described baffling pier.

Further: described pier nose be shaped as quadrant shape, described guide plate outside abutment wall direction tilts.

The beneficial effects of the utility model are: by increasing baffling pier at the outer abutment wall turning in fish pass convolution ascent stage rest pond, Make the current flowing entering turning area from the import of rest pond hindered, it is possible to make the main flow diffusion concentrated near the wall surface of outside Reduction of speed, reduces the backflow near inner edge wall surface, makes that the fluidised form in fish pass convolution ascent stage rest pond is regular, flow velocity reduces, and has It is beneficial to the rest of Fish and traces back.

Accompanying drawing explanation

Fig. 1 is the flow field schematic diagram in fish pass convolution ascent stage rest pond in prior art；

Fig. 2 is structural representation of the present utility model；

Fig. 3 is flow field of the present utility model schematic diagram；

Figure is labeled as: abutment wall, the outlet of 21-head bay room dividing pier, 22-downstream bath room import dividing pier, 23-in 1-outer abutment wall, 2- Pier nose guide plate, 3-baffling pier, 31-pier nose, 32-guide plate.

Detailed description of the invention

For the ease of understanding this utility model, below in conjunction with the accompanying drawings this utility model is further detailed.

As shown in the flow field schematic diagram of Fig. 1, if fish pass convolution ascent stage rest pond does not sets energy-dissipating and rectifying flow measure, this section of fluidised form relatively Difference, main flow concentrates on outer abutment wall 1 side, and can form large-area backflow after downstream flow；The fish pass convolution ascent stage has a rest The Upstream section in pond is head bay room, and tract is downstream bath room；Head bay room and downstream bath room connect the import of rest pond respectively and stop The outlet of breath pond, in head bay room and downstream bath room, the most parallel and be spaced to be provided with multiple long dividing pier and short dividing pier, long dividing pier Being arranged on outer abutment wall 1, short dividing pier is arranged on interior abutment wall 2, and pier nose guide plate 23 angle of inclination on each short dividing pier is identical, Being positioned at the dividing pier at the turning of abutment wall 2 in head bay room is that head bay room exports dividing pier 21, is positioned at abutment wall 2 in downstream bath room The dividing pier at turning be downstream bath room import dividing pier 22；When current enter turning area from head bay room, current can be through pier nose The impact of guide plate 23 is formed at fish pass turning area and concentrates sticking wall flow, and again owing to not stopping in turning area, main flow concentrates on outside The inwall of wall 1, forms large-area recirculating zone at turning area, and the flow field making whole turning area is disorderly.

As in figure 2 it is shown, traditional fish pass convolution ascent stage rest pond is improved by this utility model, abutment wall 1 turnaround section outside Medial surface on be vertically arranged a baffling pier 3, baffling pier 3 and interior abutment wall 2 are positioned at the corner flush of upstream.Due in order to Ensure enough energy dissipating district scopes, baffling pier 3 should not too close to head bay room, if but baffling pier 3 is too close to downstream bath room, The current that upstream can be caused again form sticking wall flow in turning area, make effect of energy dissipation be deteriorated；If from turning area downstream farther out Arrange baffling pier 3, then the current of upstream are unimpeded, and necessarily form sticking wall flow, and after sticking wall flow is formed, flow velocity is relatively big, Now arranging baffling pier 3 in downstream, the disturbance to current is relatively big, is more unfavorable for stablizing of fluidised form.Therefore, by baffling pier 3 It is arranged on the position of the corner flush being positioned at upstream with interior abutment wall 2, the current come from upstream can be made with the main flow phase circled round Liquidate mutually, beneficially energy dissipating, also can reduce the backflow in downstream simultaneously.

In order to make energy dissipating, rectification effect more preferable, the shape of baffling pier 3 also must be considered that.If directly using linear type baffling pier, Then on the one hand it is unfavorable for being formed the energy dissipating district of convolution, on the other hand can form the recirculating zone in bigger orientation after water flows through.Such as figure Shown in 2, the pier nose 31 of baffling pier 3 is arranged to the quadrant shape erect by this utility model, and outside, straight flange is just for arc-shaped edges The externally medial surface of abutment wall 1, the bottom of pier nose 31 is provided with guide plate 32 simultaneously, and the direction of the outside abutment wall 1 of guide plate 32 tilts. As it is shown on figure 3, through fish pass upstream current out through the guiding of pier nose 31, fraction is along arc-shaped edges upwards swirling flow shape Become energy dissipating district, major part to flow to downstream along guide plate 32, backflow situation be improved significantly.The length of baffling pier 3 is according to flow And flow velocity concrete condition arrange, if the length of baffling pier 3 is too short, then the scope in energy dissipating district is too small so that effect of energy dissipation It is deteriorated；If the length of baffling pier 3 is long, then can cause that flow section is too small and flow velocity is bigger.Head bay room length-width ratio is compared Suitable fish pass, baffling pier 3 size is preferably taken as about 1/2nd of head bay room width.

As in figure 2 it is shown, head bay room outlet dividing pier 21 is compared to other short dividing pier, by outside for pier nose guide plate 23 abutment wall 1 direction Deflection, the flow direction so entering turning area current from head bay room can deflect down, it is to avoid forms sticking wall flow in corner.In the past The angle of inclination of pier nose guide plate 23 be 45 °, in this utility model, outside for pier nose guide plate 23 abutment wall 1 direction is deflected 15 °～ 20 °, will pier nose guide plate 23 angle of inclination reduce 15 °～20 °, the effect of energy dissipation in baffling pier 3 lower regions can be made All it is greatly improved.

Claims (5)

1. a fish pass convolution ascent stage rest pond, including outer abutment wall (1), interior abutment wall (2), is positioned at the upstream of rest pond import Room, pond exports dividing pier (21) and is positioned at downstream bath room import dividing pier (22) of rest pond outlet, described head bay room outlet dividing pier (21) It is provided with pier nose guide plate (23)；It is characterized in that: also include that baffling pier (3), described baffling pier (3) are vertically set on outside The medial surface of wall (1) turnaround section, the pier nose (31) of baffling pier (3) is provided with guide plate (32).

2. a kind of fish pass convolution ascent stage rest pond as claimed in claim 1, it is characterised in that: described pier nose guide plate (23) Outwards abutment wall (1) direction deflects 15 °～20 °.

3. fish pass convolution ascent stage rest pond as claimed in claim 1 a kind of, it is characterised in that: described baffling pier (3) with Interior abutment wall (2) is positioned at the corner flush of upstream.

4. a kind of fish pass convolution ascent stage rest pond as claimed in claim 1, it is characterised in that: described baffling pier (3) About 1/2nd of a length of head bay room width.

5. a kind of fish pass convolution ascent stage rest pond as claimed in claim 1, it is characterised in that: the shape of described pier nose (31) Shape is quadrant shape, and described guide plate (32) outwards abutment wall (1) direction tilts.