CN212294839U

CN212294839U - Water taking structure for river water electric engineering with multiple silt

Info

Publication number: CN212294839U
Application number: CN202021721516.2U
Authority: CN
Inventors: 唐志丹; 王平; 冉从彦; 杨怀德; 罗贞华; 彭文明
Original assignee: PowerChina Chengdu Engineering Co Ltd
Current assignee: PowerChina Chengdu Engineering Co Ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-01-05
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a water intaking structure especially discloses a water intaking structure for having more silt river water conservancy project, belongs to hydraulic and hydroelectric engineering building design and construction technical field. The water taking structure for the river water electric engineering of the sediment-rich river with small influence on water taking is provided. The water intaking structure include the retaining dam, the water intaking structure still include the ditch and edulcoration mechanism, the ditch set up on the retaining dam of downstream side along retaining dam length direction, the rivers that spill over from the retaining dam crest pass through the edulcoration mechanism clear away silt impurity wherein, the rivers that clear away silt impurity are through the ditch output.

Description

Water taking structure for river water electric engineering with multiple silt

Technical Field

The utility model relates to a water intaking structure especially relates to a water intaking structure for having more silt river water flow electrical engineering, belongs to hydraulic and hydroelectric engineering building design and construction technical field.

Background

The construction of hydroelectric engineering in a river with much silt and how to effectively prevent the silt and take water are always an important problem which troubles the engineering. To solve this problem, special technical studies are usually performed. The grid dam is an engineering measure that can solve the above problems, but the conventional grid dam has the following problems:

1. the grating is easily blocked by impurities such as gravels with larger particle diameters or branches and weeds, and the water taking is influenced;

2. the large-particle-size sand stones which can pass through the grating are more, so that the water guide channel at the downstream of the grating is easy to block, and the difficulty in operation and maintenance is caused.

Therefore, a more practical and reliable grid dam structure needs to be researched to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the water taking structure for the river water electric engineering of the sediment-rich river with small influence on water taking is provided.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a water intaking structure for many silt river flowing water electrical engineering, includes the retaining dam, the water intaking structure still include inverted canal and edulcoration mechanism, inverted canal set up on the retaining dam of downstream side along retaining dam length direction, the rivers that overflow from the retaining dam crest pass through edulcoration mechanism clear away silt impurity wherein, the rivers that clear away silt impurity are through inverted canal output.

Furthermore, the impurity removing mechanism comprises a steel grid baffle, and the water flow overflowing from the top of the retaining dam passes through the steel grid baffle to remove silt impurities in the water flow.

The preferable mode of the scheme is that the steel grid block is arranged on the top of the retaining dam.

Further, the inclination angle of the steel grating blocks is 45-60 degrees and is arranged on the open upper opening of the inverted channel.

The preferable mode of the scheme is that the water taking structure further comprises at least two stages of energy dissipation steps, the energy dissipation steps at each stage are arranged on the open upper opening of the water pouring channel in a manner of gradually extending towards the downstream, and the steel grid baffles are obliquely arranged between the two adjacent stages of energy dissipation steps.

Furthermore, at least one group of gate piers is arranged along the length direction of the retaining dam, each stage of energy dissipation steps are respectively arranged on the open upper opening of the water pouring channel through the corresponding gate piers and/or retaining dam end piers, and the water pouring channel penetrates through the gate piers at the corresponding positions.

The preferable mode of the scheme is that the retaining dam is arranged on the river channel through a dam bottom foundation member.

Furthermore, the dam bottom foundation component is a concrete foundation integrally formed with the retaining dam.

The utility model has the advantages that: this application is through increasing the ditch and steel grating fender on current dam structure's of getting basis, and will the ditch set up on the manger plate dam of downstream side along manger plate dam length direction, manger plate dam low reaches overflow face set up hierarchical energy dissipation step, hierarchical energy dissipation step inboard set up steel grating. Then the water flow overflowing from the top of the dam of the retaining dam is reduced in flow velocity through the arranged grading energy dissipation steps, the water flow with the reduced flow velocity can more easily enter the water pouring channel through the steel grating gaps, and coarse-particle sand stones and impurities carried in the water flow are more easily discharged to a downstream river channel through the steeper steel grating. Like this, owing to add hierarchical energy dissipation step and comparatively precipitous steel grating to can effectual assurance water intaking efficiency and reduce the silt and the impurity content of the water of using.

Drawings

FIG. 1 is a plan view of a water intake structure of the present invention for a river water electric engineering with much sediment;

3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3

Fig. 3 is a sectional view B-B of fig. 1.

Labeled as: the device comprises a retaining dam 1, a water pouring channel 2, an impurity removing mechanism 3, an energy dissipation step 4, a gate pier 5, a retaining dam end pier 6 and a dam bottom foundation component 7.

Detailed Description

As shown in fig. 1, fig. 2 and fig. 3, the present invention provides a water intake structure for a silt-laden river water power engineering, which has less influence on water intake. The water intaking structure include retaining dam 1, the water intaking structure still include inverted canal 2 and edulcoration mechanism 3, inverted canal 2 set up on retaining dam 1 of downstream side along retaining dam 1 length direction, the rivers that overflow from the retaining dam crest pass through edulcoration mechanism 3 clear away silt impurity wherein, the rivers that clear away silt impurity are through inverted canal 2 output. This application is through increasing the ditch and steel grid keep off on current basis of getting the dam structure, and will the ditch set up on the manger plate dam of downstream side along manger plate dam length direction, then make the rivers that overflow from the manger plate dam crest pass through edulcoration mechanism clear away silt impurity wherein, the rivers that clear away silt impurity are through the ditch output. Like this, owing to increased the ditch to with the ditch set up on the manger plate dam of downstream side along manger plate dam length direction, thereby can effectually reduce the ditch that sand and stone blockked up the manger plate dam downstream side, and then reduce the influence of silt to the water intaking as far as.

The impurity removing mechanism 3 in the above embodiment may have various structures, for example, at least two stages of grids with gradually decreasing gaps are provided to remove silt and floating materials with different sizes through different gaps, respectively. The impurity removing mechanism with the structure is limited by the structure of the water retaining dam in arrangement mode. For this reason, the edulcoration mechanism 3 of this application still adopts steel grid to keep off. Because the inverted channel 2 is arranged on the downstream side of the retaining dam 1 along the length direction of the retaining dam 1, at the moment, the arrangement position of the steel grid barrier can be arranged on the dam top of the retaining dam 1, or can be arranged on the open upper opening of the inverted channel 2 with an inclination angle of 45-60 degrees. When adopting inclination to be 45 ~ 60 arrange on the open upper shed of ditch 2, the effect is best, both can effectually clear away silt, floater etc. in the rivers, because the angle of arranging of steel grating fender is steeper 45 ~ 60 again, can also effectually avoid silt, floater to pile up or the joint between the grid of steel grating fender, solved the grid and mend the problem of jam.

Further, in order to reduce the flow velocity of the water flow at the top of the steel grating and simultaneously meet the energy dissipation of the downward-discharging water flow, the water taking structure further comprises at least two stages of energy dissipation steps 4, each stage of the energy dissipation steps 4 are arranged on the open upper opening of the water pouring channel 2 in a manner of gradually extending towards the downstream, and the steel grating baffles are obliquely arranged between the two adjacent stages of energy dissipation steps 4. According to the length of retaining dam, this application still can be provided with a set of or multiunit gate pier 5 along retaining dam 1 length direction, energy dissipation step 4 at different levels arranges on dam foundation member 7 through corresponding gate pier 5 and/or retaining dam end mound 6 respectively, the ditch 2 that fall pass the gate pier 5 of relevant position department.

Of course, the retaining dam 1 described in this application is also arranged on the river channel through the dam foundation member 7. At this time, the dam bottom foundation member 7 is a concrete foundation integrally formed with the retaining dam.

In conclusion, the water taking structure provided by the application has the following advantages,

1) the multi-layer grading grating is adopted, the grating surface can be arranged steeply, sand and gravel impurities are easier to discharge to the downstream, and the grating is not easy to be blocked by sand and gravel or impurities.

2) The step of grading can play the energy dissipation effect, through the size structure who sets up the step, can control the velocity of flow of the water that flows through each layer grid, guarantees the water intaking efficiency of low elevation grid.

3) The grading energy dissipation step can also increase the energy dissipation efficiency and reduce the scouring of the downstream riverbed by the dam-passing water flow.

Example one

The technical problem that this application will solve is: the utility model provides a simple structure, can effectual grid water intaking structure of getting water and putting husky.

The downstream sides of the retaining dam and the retaining dam of the low retaining dam are provided with graded steel grids, the gradient of the steel grids is steep, the steel grids are arranged in grid clamping grooves in the energy dissipation steps, and the steel grids can be detached.

When river water carrying silt flows through the top of the retaining dam, water flows into the water pouring channel below the grating through the grating, sand and stones are discharged to a downstream river channel from the surface of the grating dam, and therefore the purposes of taking water and discharging the sand are achieved.

The technical scheme provided by the application has the following advantages:

Claims

1. The utility model provides a water intaking structure for having more silt river water-flow electrical engineering, includes retaining dam (1), its characterized in that: the water intaking structure still including water pouring channel (2) and edulcoration mechanism (3), water pouring channel (2) set up on water retaining dam (1) of downstream side along water retaining dam (1) length direction, the rivers that overflow from the water retaining dam crest pass through edulcoration mechanism (3) clear away silt impurity wherein, the rivers that clear away silt impurity are through water pouring channel (2) output.

2. The water intake structure for the river water electric engineering with silt according to claim 1, characterized in that: the impurity removing mechanism (3) comprises a steel grid block, and the water flow overflowing from the top of the retaining dam passes through the steel grid block to remove silt impurities in the water flow.

3. The water intake structure for the river water electric engineering with silt according to claim 2, characterized in that: the steel grid blocks are arranged on the top of the water retaining dam (1).

4. The water intake structure for the river water electric engineering with silt according to claim 2, characterized in that: the inclination angle of the steel grid blocks is 45-60 degrees, and the steel grid blocks are arranged on the open upper opening of the water pouring channel (2).

5. The water intake structure for the river water electric engineering with silt according to claim 4, wherein: the water taking structure further comprises at least two stages of energy dissipation steps (4), the energy dissipation steps (4) at each stage are arranged on the open upper opening of the water pouring channel (2) in a manner of gradually extending towards the downstream, and the steel grid baffles are obliquely arranged between every two adjacent stages of energy dissipation steps (4).

6. The water intake structure for the river water electric engineering with silt according to claim 5, wherein: still be provided with a set of gate pier (5) along retaining dam (1) length direction at least, energy dissipation step (4) at different levels arrange on the open upper mouth of ditch (2) through corresponding gate pier (5) and/or retaining dam end mound (6) respectively, ditch (2) pass gate pier (5) of relevant position department.

7. The water taking structure for the river water power engineering with sediment according to any one of claims 1 to 6, which is characterized in that: the water retaining dam (1) is arranged on a river channel through a dam bottom foundation component (7).

8. The water intake structure for the river water electric engineering with silt according to claim 7, wherein: the dam bottom foundation component (7) is a concrete foundation integrally formed with the retaining dam.