CN210737484U

CN210737484U - Water intaking system of hydraulic engineering

Info

Publication number: CN210737484U
Application number: CN201921290854.2U
Authority: CN
Inventors: 田雷; 刘政; 张建军
Original assignee: Sinohydro Bureau 7 Co Ltd
Current assignee: Sinohydro Bureau 7 Co Ltd
Priority date: 2019-08-10
Filing date: 2019-08-10
Publication date: 2020-06-12
Anticipated expiration: 2029-08-10

Abstract

The utility model discloses a water intake system for hydraulic engineering, which is built on a river channel and comprises an overflow weir, a water intake device and a sand settling device which are sequentially and continuously arranged from one side of the river channel to the other side; the water taking device is a dam body structure transversely arranged along a river channel and comprises a water blocking dam body on the front end surface, a water inlet on the top surface and a dam body at the rear end; the water inlet is arranged obliquely downwards along the water flow direction, and a water inlet grid which is arranged obliquely downwards along the water flow direction is arranged on the upper opening plane of the water inlet; the dam body of the water taking device is a hollow water channel, and the outlet of the water channel is connected with the inlet of the sand setting device. The technical proposal of the utility model adopts the water inlet to direct water vertically, and the water inlet grid is inclined to the downstream to facilitate the gravel discharge, thus realizing the functions of water diversion and gravel discharge; the utility model discloses the small-size hydroelectric power generation diversion flow of make full use of is little this characteristic, adopts neotype diversion grit discharge mode, makes the prelude pivot become more simple and practical, reduces engineering cost.

Description

Water intaking system of hydraulic engineering

Technical Field

The utility model belongs to the technical field of hydraulic engineering design, especially, belong to diversion engineering design technical field among the hydraulic engineering, in particular to small-size diversion electricity generation or diversion engineering's water intaking system design.

Background

In the small-size hydroelectric engineering in mountain area, gate dam mode is usually taken to the prelude pivot, or low dam water intaking mode, and the primary structure thing is the retaining dam, the sand washing floodgate, intake and grit chamber, and wherein the intake all almost adopts forward water intaking, and intake import direction is along with rivers, and the sand washing floodgate adopts forward sand washing such as bottom outlet to arrange the grit mode, and its structure is very complicated, and the engineering volume is great, and engineering cost is higher, and simultaneously, the sand discharging structure can not satisfy the getting rid of a large amount of dross in mountain area, grit.

Disclosure of Invention

The utility model discloses a water conservancy project water intaking system according to prior art's not enough. The to-be-solved problem of the utility model is to adopt a new water inlet structure, carry out the structure to sand washing floodgate and water intake structure and fuse, carried out new design to row's sediment and row gravel, water intaking mode, satisfied small-size hydraulic engineering water intaking, arrange the requirement of sediment, row's sand.

The utility model discloses a following technical scheme realizes:

the utility model provides a hydraulic engineering water intaking system, the water intaking system is built on the river course, its characterized in that: the water taking system comprises an overflow weir, a water taking device and a sand settling device which are sequentially and continuously arranged from one side of the river channel to the other side;

the overflow weir is used for retaining water and overflowing and discharging flood, and a river channel at the downstream of the overflow weir is provided with a bottom protection;

the water taking device is a dam body structure arranged transversely along a river channel and comprises a water blocking dam body on the front end face, a water inlet on the top face and a rear end dam body; the water inlet is obliquely and downwards arranged along the water flow direction, and a water inlet grid which is obliquely and downwards arranged along the water flow direction is arranged on the upper opening plane of the water inlet; the dam body of the water taking device is a hollow water channel, and the outlet of the water channel is connected with the inlet of the sand setting device.

Further the grit device includes grit chamber import and grit chamber, and grit chamber import introduction mouth of a river rivers, and the grit chamber import is 90 circular bends, becomes along the river course direction rivers from perpendicular river course direction, and the grit chamber utilizes great section reduction velocity of flow that overflows to reduce rivers and take sand ability, silt deposit final discharge grit chamber, reduce rivers silt content, guarantee through grit chamber rivers silt content meet the demands.

The front end face of the overflow weir is a water retaining dam, the top of the dam is a drainage overflow surface, and the downstream dam body is a paraboloid with drainage energy dissipation function.

And a stop log gate drainage gate for flood discharge is arranged on the side of the overflow weir at the joint of the overflow weir and the water taking device.

The dam body elevation of the water taking device is lower than that of the structural overflow weir.

The utility model discloses a water taking system hub comprises an overflow weir, a water taking device and a sand setting device, wherein the overflow weir is provided with a light stoplog door, the top of a water inlet of the water taking device is provided with a water inlet grid, the head part of a sand setting tank of the sand setting device is provided with a sand setting tank inlet bent to drainage, the overflow weir is connected with the water inlet, and the water inlet is connected with the sand setting tank inlet; the water inlet has a water inlet opening positioned at the top, water flows through the water inlet grid at the top of the water inlet, and the water vertically enters the water inlet from the top by means of self weight and then flows into the inlet of the grit chamber to enter the grit chamber; the utility model discloses the water inlet grid at water inlet top sets up to having the arrangement structure of certain slope to downstream slope, can draw water perpendicularly to do benefit to in row gravel to low reaches back cover.

The utility model discloses technical scheme adopts the perpendicular diversion of water inlet, and the slope of water inlet grid does benefit to row gravel downstream, realizes diversion and row gravel functional action. The utility model discloses the small-size hydroelectric power generation diversion flow of make full use of is little this characteristic, adopts neotype diversion grit discharge mode, makes the prelude pivot become more simple and practical, reduces engineering cost.

Drawings

Fig. 1 is a schematic view of the top plan structure arrangement of the water intake system of the present invention;

FIG. 2 is a schematic view of the arrangement of the water intake system in a downstream elevation view;

FIG. 3 is a schematic cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view B-B of FIG. 2;

fig. 5 is a schematic top plan view of an exemplary structure of the present invention.

The labels in the figures are: 1-overflow weir, 2-water inlet, 3-grit chamber, 4-stoplog gate, 5-grit chamber inlet, 6-water inlet grid, 7-bottom protection.

Detailed Description

The present invention will be further described with reference to the following embodiments, which are intended to illustrate the principles of the present invention without limiting the present invention in any way, and the present invention is not beyond the scope of the present invention.

With reference to the attached drawings.

The water taking system of the hydraulic engineering is built on a river channel and comprises an overflow weir 1, a water taking device and a sand settling device which are sequentially and continuously arranged from one side to the other side of the river channel;

the overflow weir 1 is used for retaining water and overflowing and discharging flood, and a river channel at the downstream of the overflow weir 1 is provided with a bottom protection 7;

the water taking device is a dam body structure arranged transversely along a river channel and comprises a water blocking dam body on the front end face, a water inlet 2 on the top face and a rear end dam body; the water inlet 2 is arranged obliquely downwards along the water flow direction, and a water inlet grid 6 which is arranged obliquely downwards along the water flow direction is arranged on the upper opening plane of the water inlet 2; the dam body of the water taking device is a hollow water channel, and the outlet of the water channel is connected with the inlet of the sand setting device.

The sand setting device includes grit chamber import 5 and grit chamber 3, and grit chamber import 5 cites 2 rivers of water inlet, and grit chamber import 5 is 90 circular bends, follows perpendicular river course direction to rivers, becomes along the river course direction, and grit chamber 3 utilizes great cross section area reduction velocity of flow that overflows to reduce rivers and take sand ability, silt deposits final discharge grit chamber 3, reduces rivers silt content, guarantees to satisfy the requirement through 3 rivers silt contents of grit chamber.

The front end face of the overflow weir 1 is a retaining dam, the top of the dam is a drainage overflow surface, and the downstream dam body is a paraboloid with drainage energy dissipation function. The top and two sides of the upstream and downstream profile of the overflow weir are connected by three sections of tangent arc lines, so that water flow is easy to drain and the drainage quantity is increased.

And a stop log gate 4 drainage gate for flood discharge is arranged on the side of the overflow weir at the joint of the overflow weir 1 and the water taking device. This drainage floodgate bottom elevation is less than water intaking device top elevation, and when rivers were less, can artifical mention the simple and easy drainage floodgate of stoplog formula and overflow, and the water intaking device does not overflow, overhauls the water intaking device structure.

The dam body elevation of the water taking device is lower than the elevation of the structural overflow weir 1. Thus, when the flow rate is normal or small, the whole water flow enters the water taking device, and when the flood occurs, the excessive water amount is abandoned through the overflow weir.

As shown in the figure: the utility model discloses water intaking system comprises overflow weir 1, water intaking device, sand setting device, and overflow weir 1 top elevation is higher than water inlet 2 of water intaking device, and water inlet 2 is narrow, and there is water inlet grid 6 at water inlet 2 top, and water inlet grid 6 is slope downstream setting, draws water under the conventional flow condition and gets into water inlet internal cavity through water inlet grid 6 of water inlet 5 perpendicularly, and the water inlet is connected with sand setting tank import 5 of sand setting device, and sand setting tank 3 desilts and discharges; under the flood condition, water flows over the top of the overflow weir, the bed load is clamped in the water, the larger bed load is blocked by the water inlet grille 6 to slide to the downstream protective bottom 7, the water diversion amount of the water inlet is controlled by the gate of the grit chamber, the excess water amount is discharged through the water inlet 2 and the overflow weir 1, the water flow which enters the water inlet grille 6 and contains the suspension load and the bed load enters the cavity inside the water inlet 2 through vertical diversion, the water inlet 2 is connected with the inlet 5 of the grit chamber, and the grit chamber 3 sinks sand and discharges.

The utility model discloses set up water inlet 2 into perpendicular diversion, 6 oblique slant low reaches of water inlet grid do benefit to row gravel, ingenious realization diversion and row gravel function effect.

Claims

1. The utility model provides a hydraulic engineering water intaking system, the water intaking system is built on the river course, its characterized in that: the water taking system comprises an overflow weir, a water taking device and a sand settling device which are sequentially and continuously arranged from one side of the river channel to the other side;

2. The hydraulic engineering water intaking system of claim 1, wherein: the sand setting device comprises a sand setting tank inlet and a sand setting tank, the flow cross-sectional area of the sand setting tank is larger than the cross-sectional area of the sand setting tank inlet, and the sand setting tank inlet is of a 90-degree circular bend structure.

3. The hydraulic engineering water intaking system of claim 2, wherein: the front end face of the overflow weir is a water retaining dam, the top of the dam is a drainage overflow surface, and the downstream dam body is a paraboloid with drainage energy dissipation function.

4. The hydraulic engineering water intaking system of claim 3, wherein: and a stop log gate drainage gate for flood discharge is arranged on the side of the overflow weir at the joint of the overflow weir and the water taking device.

5. The hydraulic engineering water intaking system according to any one of claims 1 to 4, wherein: the dam body elevation of the water taking device is lower than that of the structural overflow weir.