CN113005983A - Sand discharging device for normal curved surface funnel reservoir - Google Patents
Sand discharging device for normal curved surface funnel reservoir Download PDFInfo
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- CN113005983A CN113005983A CN202110138650.2A CN202110138650A CN113005983A CN 113005983 A CN113005983 A CN 113005983A CN 202110138650 A CN202110138650 A CN 202110138650A CN 113005983 A CN113005983 A CN 113005983A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
- E02B3/023—Removing sediments
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Abstract
The invention discloses a reservoir sediment ejection device based on a normal curved surface type funnel, belonging to the technical field of hydraulic engineering, and the device comprises a sediment inlet funnel and a sediment conveying pipeline; the sand inlet funnel is positioned in a sediment deposition area in the reservoir, the sand conveying pipeline is laid on a river bed of the reservoir, the bottom of the sand inlet funnel is connected with one end of the sand conveying pipeline, and the other end of the sand conveying pipeline penetrates out of the bottom of the dam; the shape of the sand inlet funnel is a bivariate normal curved surface shape, the shape of the sand conveying pipeline is an inverse hyperbolic tangent curved surface shape, and a valve is arranged on the sand conveying pipeline. When the device is operated, the valve on the sand conveying pipeline is opened, and under the action of the water pressure in the reservoir, the water flow carries the sand and sand to be discharged into the downstream of the reservoir through the sand discharge pipeline. The normal curved surface form of the sand inlet funnel and the hyperbolic tangent form of the sand conveying pipeline can effectively solve the problem that a sand inlet and the content of the pipeline are easy to block, and the sand discharging efficiency is obviously improved.
Description
Technical Field
The invention belongs to the technical field of operation management of hydraulic engineering, and particularly relates to a normal curved surface funnel reservoir sediment outflow device.
Background
After a reservoir dam is built on a riverway, silt deposition occurs in a reservoir area along with reservoir water storage. After the reservoir deposits, the storage capacity of the reservoir is reduced, and shipping of a reservoir area is influenced, so that the comprehensive benefit of the reservoir is reduced. Therefore, the problem of reservoir silt deposition is a major problem to be solved urgently in hydraulic engineering.
The reservoir sediment ejection is an important part in solving the reservoir sediment problem, and has great practical significance. At present, the prior engineering is mostly applied to discharge the sludge before the dam by adopting a sand discharge bottom hole. The sediment outflow bottom hole is generally arranged at the lower part of a dam water inlet, and after a bottom hole gate is opened, water in front of the dam is collected to an orifice, so that the partial scouring of a riverbed is easily caused to form a funnel-shaped scouring pit.
Disclosure of Invention
The invention aims to provide a normal curved surface funnel reservoir sediment outflow device aiming at the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a normal curved surface funnel reservoir sediment outflow device comprises a sediment inlet funnel and a sediment conveying pipeline; the sand inlet funnel is positioned in a sediment deposition area in the reservoir, the sand conveying pipeline is laid on a river bed of the reservoir, the bottom of the sand inlet funnel is connected with one end of the sand conveying pipeline, and the other end of the sand conveying pipeline penetrates out of the bottom of the dam; the shape of the sand inlet funnel is a bivariate normal curved surface shape, the shape of the sand conveying pipeline is an inverse hyperbolic tangent curved surface shape, and a valve is arranged on the sand conveying pipeline.
Further, the sand inlet funnel is characterized in that the upward direction along the depth of water is a z-axis positive direction, the direction along the water flow is an x-axis positive direction, and the offshore direction is a y-axis positive direction, and the appearance of the sand inlet funnel meets the following requirements:
wherein σxIs the standard deviation, σ, of the x-directionyAnd k is a correction coefficient, and is a standard deviation in the y direction.
Further, the sand conveying pipeline is in a forward direction of a y axis along the water depth direction and in a forward direction of an x axis along the water flow direction, and the shape of the sand conveying pipeline meets the following requirements:
compared with the prior art, the invention has the following beneficial effects: the bivariate normal curved surface is adopted as the curved surface of the sand inlet funnel, the surface of the sand inlet funnel is smooth, silt is not easy to deposit during sand discharge, and the silt blockage of a sand inlet can be effectively prevented; the sand conveying pipeline with the hyperbolic tangent curve shape is adopted, the surface of the sand conveying pipeline is smooth, the inlet and the outlet are consistent with the gravity direction to strengthen the siphon effect, the sand-carrying water flow can transversely pass through the dam body to be discharged smoothly, the sand discharging efficiency can be obviously improved by combining the sand conveying pipeline and the dam body, and the problem of reservoir sediment deposition is solved.
Drawings
FIG. 1 is a schematic overall longitudinal section of a normal curved surface funnel reservoir sediment ejection device according to the invention;
fig. 2 is a bivariate normal surface diagram.
Detailed Description
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic sectional view of a normal curved surface funnel-type reservoir sediment ejection device according to the present invention, which comprises a sediment inlet funnel and a sediment transport pipeline; the sand inlet funnel is positioned in a sediment deposition area in the reservoir, the sand conveying pipeline is laid on a river bed of the reservoir, the bottom of the sand inlet funnel is connected with one end of the sand conveying pipeline, and the other end of the sand conveying pipeline penetrates out of the bottom of the dam. The shape of the sand conveying pipeline is in an inverse hyperbolic tangent curve shape, the sand conveying pipeline is in a y-axis forward direction along the water depth direction and in an x-axis forward direction along the water flow direction, and the sand conveying pipeline meets the following appearance requirements:
the sand conveying pipeline is arranged in a hyperbolic tangent curve shape, the surface of the sand conveying pipeline is smooth, the inlet and the outlet of the sand conveying pipeline are consistent with the gravity direction, the middle of the sand conveying pipeline is inclined transversely, the sand conveying pipeline is beneficial to smooth downward discharge of sand-carrying water flow passing through a dam body, and the sand discharging efficiency is improved.
The shape of the sand inlet funnel is a bivariate normal curved surface shape, as shown in fig. 2, the shape of the sand inlet funnel is sufficient for a bivariate normal curved surface equation which is established along the water depth direction, the upward direction is the positive direction of a z axis, along the water flow direction, the positive direction of an x axis, and along the offshore direction, the positive direction of a y axis.
Wherein σxIs the standard deviation, σ, of the x-directionyAnd k is a correction coefficient, and is a standard deviation in the y direction. Because the bivariate normal curved surface has the characteristic that the surface is smooth everywhere, the sand inlet funnel in the shape is not easy to silt when the sand is discharged, and the silting of a sand inlet can be effectively prevented.
When the normal curved surface funnel reservoir sediment outflow device operates, the valve on the sediment conveying pipeline is opened, and under the action of water pressure in the reservoir, water flow carrying sediment is discharged into the downstream of the reservoir through the sediment inlet funnel and the sediment outflow pipeline.
Claims (3)
1. A normal curved surface funnel reservoir sediment outflow device is characterized by comprising a sediment inlet funnel and a sediment conveying pipeline; the sand inlet funnel is positioned in a sediment deposition area in the reservoir, the sand conveying pipeline is laid on a river bed of the reservoir, the bottom of the sand inlet funnel is connected with one end of the sand conveying pipeline, and the other end of the sand conveying pipeline penetrates out of the bottom of the dam; the shape of the sand inlet funnel is a bivariate normal curved surface shape, the shape of the sand conveying pipeline is an inverse hyperbolic tangent curved surface shape, and a valve is arranged on the sand conveying pipeline.
2. The normal curved surface hopper reservoir sediment outflow device of claim 1, wherein the shape of the sand inlet hopper is such that the upward direction along the depth of water is the z-axis positive direction, the direction along the flow of water is the x-axis positive direction, and the direction off-shore is the y-axis positive direction, and the sand inlet hopper has the following appearance:
wherein σxIs the standard deviation, σ, of the x-directionyAnd k is a correction coefficient, and is a standard deviation in the y direction.
3. The normal curved surface funnel-reservoir sediment outflow device of claim 1, wherein the shape of the sand transporting pipe is such that the y-axis direction is upward along the depth of water and the x-axis direction is forward along the direction of water flow, and the sand transporting pipe satisfies the following conditions:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138650.2A CN113005983B (en) | 2021-02-01 | 2021-02-01 | Sand discharging device for normal curved surface funnel reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138650.2A CN113005983B (en) | 2021-02-01 | 2021-02-01 | Sand discharging device for normal curved surface funnel reservoir |
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| Publication Number | Publication Date |
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| CN113005983A true CN113005983A (en) | 2021-06-22 |
| CN113005983B CN113005983B (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110138650.2A Active CN113005983B (en) | 2021-02-01 | 2021-02-01 | Sand discharging device for normal curved surface funnel reservoir |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116084353A (en) * | 2023-02-14 | 2023-05-09 | 浙江大学 | Smooth automatic reservoir sand discharging device and method |
Citations (10)
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|---|---|---|---|---|
| CH376859A (en) * | 1962-05-22 | 1964-04-15 | Pista Sa | Sand removal installation |
| JPS61137908A (en) * | 1984-12-08 | 1986-06-25 | Asahi:Kk | Discharging structure for deposits on lake bottom |
| CN1157358A (en) * | 1996-11-23 | 1997-08-20 | 新疆农业大学水利水电设计研究所 | Sand discharge funnel |
| CN1438388A (en) * | 2003-01-16 | 2003-08-27 | 高中明 | Water-pressure pipe sand-discharging apparatus |
| CN201155102Y (en) * | 2008-01-31 | 2008-11-26 | 张金良 | Hydraulic arranged sediment ejection structure |
| CN103938578A (en) * | 2014-02-27 | 2014-07-23 | 黄河水利委员会河南黄河河务局 | Silting reduction system for heavily silt-carrying river reservoir |
| CN103987901A (en) * | 2011-12-14 | 2014-08-13 | 格布瑞特国际股份公司 | Water closet |
| CN104250960A (en) * | 2014-09-11 | 2014-12-31 | 河海大学 | Reservoir silt-preventing laying method |
| CN205296100U (en) * | 2015-11-13 | 2016-06-08 | 单郑洲 | Husky equipment is arranged in reservoir segmentation |
| CN109878915A (en) * | 2019-04-23 | 2019-06-14 | 河南工业大学 | It is a kind of with change stream device hyperbola funnel |
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2021
- 2021-02-01 CN CN202110138650.2A patent/CN113005983B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH376859A (en) * | 1962-05-22 | 1964-04-15 | Pista Sa | Sand removal installation |
| JPS61137908A (en) * | 1984-12-08 | 1986-06-25 | Asahi:Kk | Discharging structure for deposits on lake bottom |
| CN1157358A (en) * | 1996-11-23 | 1997-08-20 | 新疆农业大学水利水电设计研究所 | Sand discharge funnel |
| CN1438388A (en) * | 2003-01-16 | 2003-08-27 | 高中明 | Water-pressure pipe sand-discharging apparatus |
| CN201155102Y (en) * | 2008-01-31 | 2008-11-26 | 张金良 | Hydraulic arranged sediment ejection structure |
| CN103987901A (en) * | 2011-12-14 | 2014-08-13 | 格布瑞特国际股份公司 | Water closet |
| CN103938578A (en) * | 2014-02-27 | 2014-07-23 | 黄河水利委员会河南黄河河务局 | Silting reduction system for heavily silt-carrying river reservoir |
| CN104250960A (en) * | 2014-09-11 | 2014-12-31 | 河海大学 | Reservoir silt-preventing laying method |
| CN205296100U (en) * | 2015-11-13 | 2016-06-08 | 单郑洲 | Husky equipment is arranged in reservoir segmentation |
| CN109878915A (en) * | 2019-04-23 | 2019-06-14 | 河南工业大学 | It is a kind of with change stream device hyperbola funnel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116084353A (en) * | 2023-02-14 | 2023-05-09 | 浙江大学 | Smooth automatic reservoir sand discharging device and method |
| CN116084353B (en) * | 2023-02-14 | 2023-08-08 | 浙江大学 | Smooth automatic reservoir sand discharging device and method |
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| CN113005983B (en) | 2022-01-04 |
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