CN207392122U - It is a kind of that there is the key water control project of desilting - Google Patents

Abstract

The utility model relates to a water conservancy project, in particular to a water conservancy project with the function of sinking sand. The water conservancy complex is composed of an upstream channel (1), a downstream channel (2) and an aqueduct (3). Wherein, the water diversion canal (3) is arranged on the side of the upstream channel (1) of the utility model, and the grit chamber (7) is arranged inside the water diversion canal (3).

Description

A water conservancy project with the function of sinking sand

technical field

The invention relates to a water conservancy project, in particular to a water conservancy project with the function of sinking sand.

Background technique

Existing water conservancy projects cannot control sediment well while diverting water, and often bring a large amount of sediment downstream, which not only damages the environment, but also affects the growth of vegetation.

After a lot of investigation and in-depth analysis of existing water conservancy projects, we have designed a water conservancy project that can effectively slow down and settle sand.

Contents of the invention

The purpose of the present invention is to provide a water conservancy project capable of effectively reducing the speed and settling sand.

The water conservancy project of the present invention is composed of an upstream channel (1), a downstream channel (2) and an aqueduct (3).

Wherein, the water diversion canal (3) is arranged on the side of the upstream channel (1) of the present invention, and the grit chamber (7) is arranged inside the water diversion canal (3).

Wherein, the grit chamber (7) is in the shape of a funnel with a wide top and a narrow bottom. A sand discharge gate (13) is arranged at the bottom of the grit chamber (7). A sand discharge pump (14) of a three-way shape is set below the sand discharge gate (13).

Wherein, a sand discharge pipe (15) is installed at the interface of the sand discharge pump (14), and the other end of the sand discharge pipe (15) is connected to the downstream river course (2). Sediment flows into the downstream channel through the sand discharge pipeline.

Wherein, a diversion gate (16) and a stilling basin (17) are arranged at the top of the diversion canal (3).

Wherein, the outlet gate (18) is set at the bottom of the diversion channel (3).

Wherein, the quantity of the grit chamber (12) can be set according to the size of the water flow and the content of the sand. Can be 1-5, preferably 3.

Wherein, a trash rack (19) is arranged at the junction of the upstream river course (1) and the diversion channel (3).

In the present invention, the function of above-mentioned each part is as follows:

Grit chamber, which uses its width to slow down the flow of water, so that the ability of the flowing water to carry sediment is greatly reduced, and the sediment will be deposited at the bottom of the chamber. The bottom of the grit chamber is set in a funnel shape to facilitate the formation of a vortex for sand discharge.

When the amount of sand settling reaches a certain set value, the sand discharge gate and the sand pump are opened, a vortex appears in the sand settling tank, and the settling sand is discharged.

The function of the diversion sluice: to introduce natural water into the water conservancy facility according to the diversion flow requirements.

The function of the stilling pool: eliminate the kinetic energy of natural water, reduce its flow rate, and facilitate the subsequent sand discharge process.

The role of the trash rack: to prevent floating objects (twigs, dead wood, production and domestic waste, etc.) on the surface of natural water flow from entering the water conservancy facilities.

Sand discharge pumps, in the present invention, each sand discharge pump is connected with two sand discharge pipelines, and only one of them is used at ordinary times, and the other is used as a spare. This can greatly save control costs. The sand discharge pumps and sand discharge gates for sand discharge are placed in the underground corridor to facilitate the maintenance of the staff.

The pipeline finally discharges the sediment to the downstream channel, and the pipeline is exposed on the channel wall. This is to prevent a large amount of sediment from accumulating on the side banks of the channel and hindering the normal operation of the channel.

The present invention can't make overall plans for the existing water control projects, that is, it can't ensure the downstream ecological demand while water diversion; it can't effectively control the dry and fresh water seasons to meet the water diversion requirements and ensure the safety of buildings. Provides a better solution.

Compared with the existing water conservancy projects, the present invention has the following characteristics:

In the past, the grit chamber was generally a first-level stilling force and a first-level grit chamber. When encountering a river system with relatively large sediment content. Its irrigation in mountainous areas will greatly damage its farmland. However, the water conservancy project of the present invention adopts a secondary sand settling and sand discharge system, so-called secondary sand settling, which introduces river water into the grit settling tank through the diversion sluice. At this time, the river water flows through the stilling tank and the water velocity decreases, and then passes through the first-level grit chamber. The sediment in the slow water flow begins to sink, and the upper clear flow overflows the overflow sill set by the grit chamber and falls into the secondary grit chamber. In the same way, the finer sediment remaining in the primary grit chamber in the water flow begins to sink and accumulate, and then the water flows through the secondary grit chamber and begins to pass through the filter wall. At this time, the size of sediment particles in the water flow is reduced to less than 0.1mm and the entire sedimentation system is completed, and the river water at this time meets the requirements for farmland irrigation.

The invention greatly improves the sand settling and sand discharge capacity of the river course, and guarantees the safety and reserve of the water supply of the farmland.

The water conservancy project of the present invention enables the flowing water with high sand content in the upstream to slow down and settle sand, reducing the sand content. The upper clear water enters the water diversion channel. In order to prevent the moving sediment from entering the water diversion channel, the baseline of the water diversion channel is higher than the river foundation to a certain extent, and a trash rack is set to prevent debris from entering the water diversion channel.

An overflow dam is installed in the downstream section, which can ensure the diversion flow in the dry season and at the same time prevent floods and reduce disasters in the flood season. The drop accumulated in the horizontal river channel increases the amount of water diversion, and when the gate is opened, it can use the sand-carrying force of the water to wash away the upstream silt.

At the same time, the invention can effectively reduce the sediment content entering the water diversion canal, and does not use manual dredging to treat the upstream sediment.

The water conservancy project of the present invention is mainly designed for mountainous areas, and the curve design of the water conservancy project: the degree of curvature of the channel is designed according to the flow rate of upstream water. Diversion canal location: choose the best position to open and set the diversion canal at the upstream river channel. Accumulated drop: According to the longitudinal slope of the terrain, the length of the channel is designed to ensure that the accumulated water head can wash away the sediment accumulated in the upstream, and the sediment in the artificial channel can be discharged to the downstream of the river through the sediment discharge pipe. Channel cofferdam: the vertical mode is adopted to solve the problem of difficult excavation in mountainous terrain and reduce the amount of construction. To ensure stability, rivets are added to it. Material selection: Use local materials as much as possible to reduce costs, but the materials must be calculated according to relevant specifications and actual needs of water conservancy projects.

The water conservancy project of the present invention can not only realize a water diversion flow rate of 100m ³ /s, but also meet the function of preventing sediment above 0.1mm from entering the diversion channel. We used a series of combined buildings, and used trash racks, electrochemical anti-corrosion methods, etc. in consideration of mountainous buildings. We are well aware of the importance of safe operation of engineering buildings. Therefore, in order to ensure the long-term water conservancy function of the irrigation diversion canal hub project in mountainous areas and ensure its smooth operation, we have set up a relatively reliable structure for it to facilitate subsequent use, and create the greatest possible convenience for possible repairs.

Description of drawings

Figure 1. The structure diagram of the result of the water conservancy project

Figure 2. Grit chamber

Marked in the figure:

Upstream channel (1), downstream channel (2), diversion channel (3), overflow dam (4), concave bank (5) and convex bank (6), grit chamber (7), filter wall (8) , sand discharge gate (9), stilling basin (10), anchor rod (11), river channel wall (12), sand discharge gate (13), sand discharge pump (14), sand discharge pipe (15), diversion gate (16), stilling basin (17), outlet gate (18), trash rack (19),

Detailed ways

The present invention will be further illustrated by the following specific examples, but not as a limitation of the present invention.

Embodiment 1, water conservancy project

The water conservancy project of the present invention is composed of an upstream channel (1), a downstream channel (2) and an aqueduct (3).

Wherein, the water diversion canal (3) is arranged on the side of the upstream channel (1) of the present invention, and the grit chamber (7) is arranged inside the water diversion canal (3).

Wherein, the diversion canal (3) is arranged on the side of the upstream channel (1), and the grit chamber (7) is arranged inside the diversion canal (3).

Embodiment 2, water conservancy project

The water conservancy project of the present invention is composed of an upstream channel (1), a downstream channel (2) and an aqueduct (3).

Wherein, the water diversion canal (3) is arranged on the side of the upstream channel (1) of the present invention, and the grit chamber (7) is arranged inside the water diversion canal (3).

Wherein, the diversion canal (3) is arranged on the side of the upstream channel (1), and the grit chamber (7) is arranged inside the diversion canal (3).

Wherein, the grit chamber (7) is in the shape of a funnel with a wide top and a narrow bottom. A sand discharge gate (13) is arranged at the bottom of the grit chamber (7). A sand discharge pump (14) of a three-way shape is set below the sand discharge gate (13).

Wherein, a sand discharge pipe (15) is installed at the interface of the sand discharge pump (14), and the other end of the sand discharge pipe (15) is connected to the downstream river course (2). Sediment flows into the downstream channel through the sand discharge pipeline.

Embodiment 3, water conservancy project

The water conservancy project of the present invention is composed of an upstream channel (1), a downstream channel (2) and an aqueduct (3).

Wherein, the water diversion canal (3) is arranged on the side of the upstream channel (1) of the present invention, and the grit chamber (7) is arranged inside the water diversion canal (3).

Wherein, the diversion canal (3) is arranged on the side of the upstream channel (1), and the grit chamber (7) is arranged inside the diversion canal (3).

Wherein, the grit chamber (7) is in the shape of a funnel with a wide top and a narrow bottom. A sand discharge gate (13) is arranged at the bottom of the grit chamber (7). A sand discharge pump (14) of a three-way shape is set below the sand discharge gate (13).

Wherein, a sand discharge pipe (15) is installed at the interface of the sand discharge pump (14), and the other end of the sand discharge pipe (15) is connected to the downstream river course (2). Sediment flows into the downstream channel through the sand discharge pipeline.

Wherein, a diversion gate (16) and a stilling basin (17) are arranged at the top of the diversion canal (3).

Wherein, the outlet gate (18) is set at the bottom of the diversion channel (3).

Wherein, the quantity of the grit chamber (12) can be set according to the size of the water flow and the content of the sand. Can be 1-5, preferably 3.

Wherein, a trash rack (19) is arranged at the junction of the upstream river course (1) and the diversion channel (3).

Claims (1)

1. A water conservancy project with a sedimentation function, characterized in that it consists of an upstream channel (1), a downstream channel (2) and a diversion channel (3), wherein the diversion channel (3) is arranged on the upstream channel (1) side, the grit chamber (7) is set inside the diversion channel (3), Wherein, diversion gate (16) and stilling basin (17) are set at the top of diversion canal (3), Among them, an anti-filter wall (8) is set at the end of the diversion canal (3), the grit chamber (7) is in the shape of a funnel with a wide top and a narrow bottom, and a sand discharge gate (13) is set at the bottom of the grit chamber (7). , a tee-shaped sand discharge pump (14) is set below the sand discharge gate (13), a sand discharge pipe (15) is installed at the interface of the sand discharge pump (14), and a sand discharge pipe (15) The other end is connected to the downstream channel (2).