CN219218844U

CN219218844U - Automatic underwater separation device for riverbed sand and stones

Info

Publication number: CN219218844U
Application number: CN202223483501.9U
Authority: CN
Inventors: 黄泽普; 蔡文斌; 宋龙宝; 肖英才; 简江华; 王秋炎
Original assignee: Jiangxi Space Ecological Construction Co ltd
Current assignee: Jiangxi Space Ecological Construction Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-06-20
Anticipated expiration: 2032-12-27

Abstract

An automatic underwater separation device for riverbed sand stones is characterized in that a sand blocking dam with the height lower than that of riverbed sand beach is constructed at a river channel opening or corner, a vertical gravel fence is arranged on the sand blocking dam, and a coarse sand separation sieve groove consisting of a horizontal fine sand sieve and a vertical coarse sand fence is arranged behind the vertical gravel fence; a gravel pool, a coarse sand pool, a fine sand pool and a silt pool are dug out at the bottom of a river bed at the downstream of the sand blocking dam, the fine sand pool is positioned in the middle of a river channel, the coarse sand pool and the gravel pool are sequentially arranged at two ends of the fine sand pool, and a water diversion channel and a gate are arranged at the tail end of the sand blocking dam; a water retaining wall and a gate are arranged below the silt pool. The utility model relates to a silt-preventing water-friendly project for intercepting sand and stones wrapped by flood above river, reservoir, wetland and other river areas, which has the advantages of simple operation, safe use and low project cost, can effectively intercept and recycle the sand and stones wrapped in flood, reduces silt accumulation of downstream river channels and water bodies, and can provide a large amount of high-quality and low-cost sand and stone resources for local infrastructure construction.

Description

Automatic underwater separation device for riverbed sand and stones

Technical Field

The utility model relates to an underwater automatic separation device for riverbed sand stones.

Background

Under the action of natural physical and chemical conditions such as lifting of the crust, weathering and ablation of rock, water flow flushing and the like, rock sand is wrapped and transported by flood. When the kinetic energy of flood is weakened, the flood is precipitated in the river reservoir, and the sediment is accumulated in the river bed and the reservoir, so that the sediment accumulation is serious, even an overground suspended river is formed, the frequent occurrence of flood disasters in the river reservoir is caused, and the ecological safety is seriously threatened. Therefore, the sediment accumulation problem of the river bed and the reservoir is a great challenge for ecological management of the river reservoir. The existing river dredging means, such as sand picking operations of a sand dredger, a sand pumping ship and the like, have the defects of river muddy water pollution, stone-related dangerous beaches, open sores, shoveling out bank bases, pier protection layers and the like, which damage the ecological environment of the river, and are also the root cause of the disorder of the sand and stone market. And dredging operations of riverways such as dredging vessels and sand pumping vessels are banned, sediment in riverbeds and storage basins is accumulated and thickened, the heights of the riverbeds and the storage basins are raised, and larger ecological problems are caused.

The ecological environment destruction actions such as river channel sand collection, step sand digging, mountain-frying broken stone sand making and the like are forbidden, so that the sand and stone resources in the building industry are short, the cost of various foundation projects is indirectly increased, and the normal operation of national economy is also influenced to a certain extent.

At present, besides emphasis on forestation, ecological protection and soil erosion prevention measures on upstream of rivers and reservoirs, a mature technical scheme for solving the contradiction between natural ecology and social economic development is not available.

Disclosure of Invention

The utility model aims to provide the river bed sand and stone underwater automatic sorting device which is simple and convenient to operate, safe to use and low in engineering cost, can effectively intercept and recycle sand and stones wrapped in flood, and reduces sediment accumulation in downstream river channels and water bodies.

The utility model relates to an underwater automatic separation device for riverbed sand stones, which is characterized in that a sand blocking dam with the height lower than that of riverbed sand beach is constructed at a river channel opening or corner, a vertical gravel fence consisting of coarse sand screen modules is arranged on the sand blocking dam, the length of the vertical gravel fence is smaller than that of the sand blocking dam, a coarse sand separation sieve groove consisting of a horizontal fine sand screen and a vertical coarse sand fence is arranged behind the vertical gravel fence, and the coarse sand separation sieve groove is supported by a sieve groove bracket; digging a gravel pool, a coarse sand pool, a fine sand pool and a silt pool at the bottom of a river bed at the downstream of the sand blocking dam, wherein the fine sand pool is positioned in the middle of a river channel, the coarse sand pool and the gravel pool are sequentially arranged at two ends of the river channel, the fine sand pool and the coarse sand pool are separated by a silt baffle, and the coarse sand pool and the gravel pool are separated by the fine sand baffle; the silt pool is positioned below the fine sand pool; a water diversion channel and a gate are arranged at the tail end of the sand blocking dam; a water retaining wall and a gate are arranged below the silt pool.

The utility model relates to a river bed gravel underwater automatic sorting device, which is characterized in that a gate of a diversion channel is opened in a water leveling period and a water withering period, so that river water flows downstream through the diversion channel, and a channel is provided for various fishes and ships. When flood comes, the gates of the diversion channel and the water retaining wall are closed, so that the whole sand sedimentation tank is fully reserved by river water in advance, and the flood is waited for. When flood reaches the sand blocking dam, the sand and stones are separated by the vertical gravel fence, the gravel above the coarse sand is blocked by the fence and moves downwards along the side direction of the sand blocking dam, the dam without the fence is turned over to fall into the gravel sedimentation tank, and the mixed sand below the coarse sand passes through the fence to fall into the coarse sand separation sieve tank. The first time underwater automatic separation of the gravel and the coarse sand of the device is realized; the mixed sand and stones falling into the coarse sand separation sieve groove are separated by a horizontal fine sand sieve and a vertical coarse sand fence, and coarse sand and fine sand respectively fall into respective sand settling tanks, so that the secondary underwater automatic separation of coarse sand and fine sand of the device is realized; the sand and stone wrapped by flood is automatically separated under water for the second time, and the fine silt with small particles is remained in the silt pool below the silt pool, so that the third time underwater automatic separation of fine silt and silt by the device is realized. After flood, the gates of the diversion channel and the water retaining wall are opened to separate river water from the sand sedimentation tank, so that the downstream river channel is not polluted in the sand and stone recovery process.

The river bed sand and stone underwater automatic sorting device is a siltation-preventing and water-benefiting project for intercepting the sand and stone wrapped by flood above river, reservoir, wetland and other river areas, is simple and convenient to operate, safe to use and low in project cost, can effectively intercept and recycle the sand and stone wrapped in flood, reduces sediment accumulation of downstream river channels and water bodies, plays an important role in the aspect of ecological environment management of large and small water systems and water bodies, and can also provide a large amount of sand and stone resources with high quality and low cost for local infrastructure construction.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the B-B structure of FIG. 1;

FIG. 3 is a schematic view of the structure A-A in FIG. 1;

1. river course, 2, vertical gravel fence, 3, coarse sand separation sieve groove, 4, sand blocking dam, 5, gate, 6, sieve groove support, 7, diversion canal, 8, vertical coarse sand fence, 9, fine sand baffle, 10, silt baffle, 11, retaining wall, C, gravel pond, D, coarse sand pond, E, fine sand pond, F, silt pond.

Detailed Description

The river bed sand and stone underwater automatic sorting device is characterized in that a sand blocking dam 4 with the height lower than that of a river bed sand beach is constructed at a gap or corner of a river channel 1, a vertical gravel fence 2 with the height of 20-30 cm and composed of coarse sand screen modules is arranged on the sand blocking dam 4, the length of the vertical gravel fence 2 is smaller than that of the sand blocking dam 4, a coarse sand sorting screen groove 3 composed of a horizontal fine sand screen and a vertical coarse sand fence 8 is arranged at the rear of the vertical gravel fence 2, the coarse sand sorting screen groove 3 is supported by a screen groove support 6, and the included angles between the sand blocking dam 4, the vertical gravel fence 2, the vertical coarse sand fence 8 and the water flow direction are smaller than 45 degrees; a gravel pool C, a coarse sand pool D, a fine sand pool E and a silt pool F are dug out at the bottom of a river bed at the downstream of the sand blocking dam 4, the fine sand pool E is positioned in the middle of the river channel 1, the coarse sand pool D and the gravel pool C are sequentially arranged at two ends of the fine sand pool E, the fine sand pool E and the coarse sand pool D are separated by a silt baffle 10, and the coarse sand pool D and the gravel pool C are separated by a fine sand baffle 9; the silt pool F is positioned below the fine sand pool E; a water diversion channel 7 and a gate 5 are arranged at the tail end of the sand blocking dam 4; the lower part of the silt pool F is provided with a water retaining wall 11 and a gate 5, and the height of the water retaining wall 11 is the same as the bottom of the screen groove bracket 6.

Claims

1. An automatic separation device under water of riverbed gravel and sand, its characterized in that: constructing a sand blocking dam (4) with the height lower than that of a riverbed beach at a gap or a corner of a riverway (1), installing a vertical gravel fence (2) consisting of coarse sand screen modules on the sand blocking dam (4), wherein the length of the vertical gravel fence (2) is smaller than that of the sand blocking dam (4), arranging a coarse sand separation sieve groove (3) consisting of a horizontal fine sand screen and a vertical coarse sand fence (8) behind the vertical gravel fence (2), and supporting the coarse sand separation sieve groove (3) by a sieve groove bracket (6); a gravel pool (C), a coarse sand pool (D), a fine sand pool (E) and a silt pool (F) are dug at the bottom of a river bed at the downstream of the sand blocking dam (4), the fine sand pool (E) is positioned in the middle of a river channel (1), the coarse sand pool (D) and the gravel pool (C) are sequentially arranged at two ends, the fine sand pool (E) and the coarse sand pool (D) are separated by a silt baffle (10), and the coarse sand pool (D) and the gravel pool (C) are separated by a fine sand baffle (9); the silt pool (F) is positioned below the fine sand pool (E); a water diversion channel (7) and a gate (5) are arranged at the tail end of the sand blocking dam (4); a water retaining wall (11) and a gate (5) are arranged below the silt pool (F).

2. The automatic separation device under water for riverbed sand stones according to claim 1, wherein: the included angle between the sand blocking dam (4), the vertical gravel fence (2) and the vertical coarse sand fence (8) and the water flow direction is smaller than 45 degrees.

3. The automatic separation device under water for riverbed sand stones according to claim 1, wherein: the height of the vertical gravel fence (2) on the sand blocking dam (4) is 20-30 cm.