CN202187326U

CN202187326U - Sinking-mode top inflow sand-scouring gallery structure

Info

Publication number: CN202187326U
Application number: CN201120267025XU
Authority: CN
Inventors: 黄东军; 余雪松; 陈振文
Original assignee: Hydrochina East China Engineering Corp
Current assignee: Hydrochina East China Engineering Corp
Priority date: 2011-07-21
Filing date: 2011-07-21
Publication date: 2012-04-11
Anticipated expiration: 2021-07-21

Abstract

The utility model relates to a sinking-mode top inflow sand-scouring galley structure. The technical problem to be solved by the utility model is to provide a sinking-mode top inflow sand-scouring galley structure with a simple structure and convenience in construction, wherein the sinking-mode top inflow sand-scouring galley structure can remove silt along the sand-scouring galley, can simultaneously keep the front of a gate of an electric generating water inlet to be clean, can eliminate air intake eddy appeared above the sand-scouring galley under a flood discharge working condition and can ensure the security of a sand sand-scorning hole structure. The technical scheme for solving the problem is that the sinking-mode top inflow sand-scouring galley structure comprises a galley body, top part of which is provided with a group of inflow holes; the sinking-mode top inflow sand-scouring galley structure is characterized in that a group of eddy-eliminating beams is uniformly distributed above the galley body. The sinking-mode top inflow sand-scouring galley structure is mainly applicable to a hydropower project, in particular to a hydropower station for a sediment-laden river.

Description

Sunk type top influent stream scour gallery structure

Technical field

The utility model relates to a kind of scour gallery structure, and particularly a kind of sunk type top influent stream scour gallery structure mainly is applicable in the Hydropower Project, is specially adapted to the power station of fully-loaded stream.

Background technology

For the power station of building on fully-loaded stream,, arrange the sand surfing hole before the water inlet of being everlasting for keeping generating water inlet " clear in front of the door ".When water channeling type power station, bank has many diversion tunnels, water inlet horizontal spreading broad, can adopt and arrange many sand surfing holes, enlarge the mode of sand surfing scope; Also can only arrange a sand surfing hole, and in the sand surfing hole the anterior scour gallery of arranging, make the sand surfing effect extend to a plurality of generating water inlets before.Latter's flexible arrangement is invested lower.When flood discharge need be participated in the sand surfing hole, because flow velocity is higher in the flood discharge operation condition hole, the scour gallery top was prone to produce air-breathing whirlpool, jeopardizes the safety of sand surfing hole structure.Therefore, the sand surfing hole water inlet structure that has sand surfing and flood discharge function simultaneously concurrently is arranged, should satisfy the hydraulics requirement of sand surfing operation, and hydraulics requirement when satisfying the flood discharge operation again has special requirement to the layout of scour gallery.

Summary of the invention

The technical problem that the utility model will solve is: the sunk type top influent stream scour gallery structure that a kind of simple in structure, easy construction is provided; Can get rid of scour gallery silt along the line; Keep generating water inlet " clear in front of the door " simultaneously; And when the flood discharge operating mode, can eliminate the air-breathing whirlpool that the scour gallery top occurs, guarantee the safety of sand surfing hole structure.

The technical scheme that the utility model adopted is: sunk type top influent stream scour gallery structure, comprise the gallery main body, and one group of drainage hole is offered at its top, it is characterized in that: one group of whirlpool beam that disappears is evenly arranged in said gallery main body top.

Said drainage hole is rectangular, and the width of each drainage hole diminishes along water (flow) direction gradually.

The center line of said drainage hole and the angle of horizontal plane are 45 degree, and its incline direction is downward-sloping along water (flow) direction.

Said gallery body cross-section is the shape of falling the gateway opening of square top and round bottom.

Said gallery main body entire arrangement is in the rock mass of sand trap bottom.

The whirlpool beam that respectively disappears is positioned on the same horizontal plane, and arranges perpendicular to gallery main center line.

The beneficial effect of the utility model is: the utility model is evenly arranged one group of whirlpool beam that disappears above the scour gallery main body; Air-breathing whirlpool appears in the scour gallery top in the time of can effectively preventing the flood discharge of sand surfing hole; Thereby prevent that the sand surfing hole from cavitation erosion taking place, and has guaranteed the safety of sand surfing hole structure; In addition, the utility model adopts the arrangement form in scour gallery combination wall scroll sand surfing hole, can solve the problem of a plurality of generating diversion water inlets " clear in front of the door " simultaneously, has reduced construction investment.

Description of drawings

Fig. 1 is the outline inboard profile of the utility model.

Fig. 2 is that the 1-1 of Fig. 1 is to sectional drawing.

Fig. 3 is the disappear structural layout plan of whirlpool beam of the utility model.

Fig. 4 is the layout plan of the utility model.

The specific embodiment

For the power station of building on fully-loaded stream, get into the power station hydraulic turbine for avoiding bulky grain silt, before water inlet, build sand trap usually.Like Fig. 1-shown in Figure 4; Present embodiment comprises and is positioned at the anterior and entire arrangement in sand surfing hole in the gallery main body 1 (adopting the concreting of C50 impact-resisting wear-resisting to form) of sand trap bottom rock mass; It is 70～90 ° that its center line generally is controlled at generating diversion water (flow) direction angle, and (be simplified structure, scour gallery is as far as possible away from water inlet to keep certain distance with the water inlet leading edge; But guarantee that water inlet is in the scope of sand surfing funnel), its current delivery outlet is communicated with the import of sand surfing hole.Said gallery main body 1 cross section is the shape of falling the gateway opening of square top and round bottom; Offer one group of not wide rectangle drainage hole 2 (width of each drainage hole diminishes along water (flow) direction gradually in this example) at this gallery main body 1 top; The center line of this drainage hole and the angle of horizontal plane are 45 degree; Its incline direction is downward-sloping along water (flow) direction, helps taking in the balanced entering gallery main body 1 of husky current.

When the sand surfing hole was used for flood discharge, for eliminating the air-breathing whirlpool that the scour gallery top occurs, bilateral symmetry was arranged some vertical posts 4 above gallery main body 1; Each capital end is positioned on the same horizontal plane, between two also adjacent posts 4 of the same side, adopts the beam 5 of horizontal arrangement to connect, and forms two long beams that are parallel to each other; Simultaneously, the two ends of two long beams are connected respectively, form the rectangular beam framework of a horizontal arrangement; In this beam framework, evenly arrange one group of whirlpool beam 3 that disappears; The whirlpool beam 3 that respectively disappears is positioned at same plane with said beam framework, and directly arranges the harmful whirlpool when being used to eliminate influent stream in gallery main body 1 center line.

The hydraulic model test checking of the utility model technical scheme, confirmation is feasible, can get a desired effect.

Claims

1. a sunk type top influent stream scour gallery structure comprises gallery main body (1), and one group of drainage hole (2) is offered at its top, it is characterized in that: one group of whirlpool beam (3) that disappears is evenly arranged in said gallery main body (1) top.

2. sunk type according to claim 1 top influent stream scour gallery structure is characterized in that: said drainage hole (2) is rectangular, and the width of each drainage hole (2) diminishes along water (flow) direction gradually.

3. sunk type according to claim 1 and 2 top influent stream scour gallery structure is characterized in that: the center line of said drainage hole (2) and the angle of horizontal plane are 45 degree, and its incline direction is downward-sloping along water (flow) direction.

4. sunk type according to claim 1 top influent stream scour gallery structure is characterized in that: said gallery main body (1) cross section is the shape of falling the gateway opening of square top and round bottom.

5. according to claim 1 or 4 described sunk type top influent stream scour gallery structures, it is characterized in that: said gallery main body (1) entire arrangement is in the rock mass of sand trap bottom.

6. sunk type according to claim 1 top influent stream scour gallery structure is characterized in that: the whirlpool beam (3) that respectively disappears is positioned on the same horizontal plane, and arranges perpendicular to gallery main body (1) center line.