CN107794885B - Ecological water intake conical trash rack - Google Patents
Ecological water intake conical trash rack Download PDFInfo
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- CN107794885B CN107794885B CN201711072768.XA CN201711072768A CN107794885B CN 107794885 B CN107794885 B CN 107794885B CN 201711072768 A CN201711072768 A CN 201711072768A CN 107794885 B CN107794885 B CN 107794885B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
- E02B5/085—Arresting devices for waterborne materials, e.g. gratings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention discloses a conical trash rack for an ecological water intake, which comprises an ecological water intake pipe positioned in a dam body; a steel plate ring (4) is pre-embedded in a water intake (3) of the ecological water intake pipe, a group of double lifting lugs (5) which are uniformly distributed along the circumference are arranged on the outer side of the steel plate ring (4), and the double lifting lugs (5) are connected with a conical trash rack (7) through bolts (6). According to the invention, the structural strength and stability requirements of the trash rack body under the condition of high flow speed are met, meanwhile, the material of the trash rack is saved, and dirt is not easy to attach to the trash rack, so that trash rack is facilitated; and the water flow damping can be reduced, the hydraulics condition is improved, and the vibration of the trash rack during overflowing is effectively reduced.
Description
Technical Field
The invention relates to a conical trash rack for an ecological water intake, and belongs to the technical field of metal structures of hydraulic and hydroelectric engineering.
Background
Based on the requirement of environmental protection, the hydropower engineering needs to discharge ecological flow to the downstream during the stop of the unit and the water storage of a lower gate, a drain valve is usually arranged at the bottom of a dam body to discharge the ecological flow to the downstream, and the traditional welded reinforcing mesh trash blocking technology is adopted, so that the rigidity and the stability of the reinforcing mesh are poor, and for the hydropower engineering with more suspended load or bed load at the bottom of the dam body, the large-size dirt can damage the reinforcing mesh and enter a flow channel to cause damage of a valve body, sometimes, the drain flow channel can be even blocked to cause engineering accidents, so the prior art is still imperfect and needs to be further improved.
Disclosure of Invention
The invention aims to provide a conical trash rack for an ecological water intake, which meets the requirements of structural strength and stability of a trash rack body under the condition of high flow speed, saves materials of the trash rack, prevents dirt from being easily attached to the trash rack, is beneficial to trash rack, can reduce water flow damping, improves hydraulic conditions, effectively reduces vibration of the trash rack during overflowing and overcomes the defects of the prior art.
The technical scheme of the invention is realized as follows:
the invention relates to a conical trash rack of an ecological water intake, which comprises an ecological water intake pipe positioned in a dam body, wherein the ecological water intake pipe is a reducing pipe or an equal-diameter pipe; a steel plate ring is pre-embedded at a water intake of the ecological water intake pipe, a group of double lifting lugs which are uniformly distributed along the circumference are arranged outside the steel plate ring, and the double lifting lugs are connected with the conical trash rack through bolts; the conical trash rack comprises an annular supporting seat, and a group of straight grooves which are uniformly distributed along the circumference are formed in the annular supporting seat; the annular supporting seat is provided with a cross-shaped main grid; the cross-shaped main grid comprises a vertical grid plate; two sides of the vertical grid plate are respectively and vertically welded with the horizontal grid plate; a small arc rib plate, a middle arc rib plate and a large arc rib plate are respectively arranged between each vertical grid plate and each horizontal grid plate; a radial inner rib plate, a radial middle rib plate and a radial outer rib plate are arranged between each vertical grid plate and each horizontal grid plate; the radial inner rib plate is positioned between the small circular-arc rib plate and the middle circular-arc rib plate, the radial middle rib plate is positioned between the middle circular-arc rib plate and the large circular-arc rib plate, and the radial outer rib plate is positioned on the outer side of the large circular-arc rib plate.
In the above-mentioned ecological water intake conical trash rack, the overall shape of the conical trash rack is conical, and the conical surface of the conical trash rack faces the upstream direction.
In the ecological water intake conical trash rack, the vertical grid plate is in an equilateral triangle shape, the horizontal grid plate is in a right-angled triangle shape, and the vertical grid plate and the horizontal grid plate are the same in height; a right-angle side of the two horizontal grid plates and two sides of the vertical grid plate are symmetrically welded to form a cross-shaped main grid; the bottom surface of the cross-shaped main grid is welded with the straight groove on the annular supporting seat.
In the ecological water intake conical trash rack, the small arc rib plates, the middle arc rib plates and the large arc rib plates are all 90-degree arc plates; the heights of the small arc rib plates, the middle arc rib plates and the large arc rib plates are the same as the heights of the corresponding welding parts of the vertical grid plates.
In the ecological water intake conical trash rack, the radial inner rib plate and the radial middle rib plate are in right-angled trapezoids; the shape of the radial outer rib plate is a right triangle, and bolt holes are arranged at the joints of the vertical grid plate, the horizontal grid plate, the radial outer rib plate and the double lifting lugs; the right-angle sides of the radial inner ribbed plates and the radial middle ribbed plates and the right-angle side of the radial outer ribbed plates are welded with the straight groove on the annular supporting seat.
In the ecological water intake conical trash rack, the overflowing edge forces of the small circular-arc rib plates, the middle circular-arc rib plates, the large circular-arc rib plates, the radial inner rib plates, the radial middle rib plates, the radial outer rib plates, the vertical grid plates and the horizontal grid plates are chamfered into streamline cambered surfaces.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects: 1. the trash rack is in a lattice conical shape, the section size of the main rack is linearly changed along with the bending moment, the structural strength and stability requirements of the trash rack body under the condition of high flow speed are met, meanwhile, the material of the trash rack is saved, dirt is not easy to attach to the trash rack, and trash rack blocking is facilitated; 2. the flow surface of the grid bars is conical, and the front end surface and the rear end surface are of streamline structures, so that the water flow damping is greatly reduced, the hydraulic condition is good, and the vibration of the trash rack during the flow is effectively reduced; 3. the annular steel plate is connected with the reducing pipe with a large front end and a small rear end and the equal-diameter pipe, so that the flow velocity of the ecological water intake can be reduced by locally increasing the flow surface of the ecological water intake, the vibration of the trash rack during overflowing is reduced, and the trash blocking of the ecological water intake pipe with high flow velocity is facilitated; 4. the annular supporting seat is provided with a straight groove corresponding to the positions of the cross equilateral triangle-shaped main grid plate and the radial outer rib plate, so that the grid plate can be fixed; 5. the cross equilateral triangle-shaped main grid plate and the radial outer rib plate are embedded into the straight groove and then connected with the lifting lugs of the annular supporting seat through bolts, so that the vibration resistance of the trash rack under high-flow-speed water flow is effectively improved; 6. the conical trash rack is connected with the lifting lugs of the annular supporting seat through bolts, so that the adaptability to vibration is good, the service life of the trash rack is prolonged, and assembly and disassembly are facilitated.
Drawings
FIG. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second structural diagram of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an assembled schematic view of FIG. 2;
FIG. 5 is a schematic view of three radial ribs.
In the figure: the device comprises a 1-reducing pipe, a 2-reducing pipe, a 3-water intake, a 4-steel plate ring, a 5-double lifting lug, a 6-bolt, a 7-conical trash rack, an 8-annular supporting seat, a 9-straight groove, a 10-cross main grid, a 11-vertical grid plate, a 12-horizontal grid plate, a 13-small arc rib plate, a 14-middle arc rib plate, a 15-large arc rib plate, a 16-radial inner rib plate, a 17-radial middle rib plate, a 18-radial outer rib plate and a 19-bolt hole.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples, but without any limitation thereto.
The invention relates to a conical trash rack of an ecological water intake, which is shown in figures 1-5. The ecological water intake pipe is positioned in the dam body and is a reducing pipe 1 or an equal-diameter pipe 2; the method is characterized in that: a steel plate ring 4 is pre-embedded in a water intake 3 of the ecological water intake pipe, a group of double lifting lugs 5 which are uniformly distributed along the circumference are arranged outside the steel plate ring 4, and the double lifting lugs 5 are connected with a conical trash rack 7 through bolts 6; the conical trash rack 7 comprises an annular supporting seat 8, and a group of straight grooves 9 which are uniformly distributed along the circumference are formed in the annular supporting seat 8; a cross-shaped main grid 10 is arranged in a straight groove 9 of the annular supporting seat 8; the cross-shaped main grid 10 includes vertical grid plates 11; two sides of the vertical grid plate 11 are respectively vertically welded with the horizontal grid plate 12; a small arc rib plate 13, a middle arc rib plate 14 and a large arc rib plate 15 are respectively arranged between each vertical grid plate 11 and each horizontal grid plate 12; a radial inner rib plate 16, a radial middle rib plate 17 and a radial outer rib plate 18 are arranged between each vertical grid plate 11 and each horizontal grid plate 12; the radial inner rib 16 is positioned between the small circular-arc rib 13 and the middle circular-arc rib 14, the radial middle rib 17 is positioned between the middle circular-arc rib 14 and the large circular-arc rib 15, and the radial outer rib 18 is positioned outside the large circular-arc rib 15. The overall shape of the conical trash rack 7 is conical, and the conical surface of the conical trash rack 7 faces the upstream direction. The vertical grid plate 11 is an equilateral triangle, the horizontal grid plate 12 is a right-angled triangle, and the vertical grid plate 11 and the horizontal grid plate 12 are the same in height; one right-angle side of the two horizontal grid plates 12 is symmetrically welded with two sides of the vertical grid plate 11 to form a cross-shaped main grid 10; the bottom surface of the cross-shaped main grid 10 is welded with the straight groove 9 on the annular supporting seat 8. The small arc rib plate 13, the middle arc rib plate 14 and the large arc rib plate 15 are all 90-degree arc plates; the height of the small arc rib 13, the height of the middle arc rib 14 and the height of the large arc rib 15 are the same as the height of the corresponding welding part of the vertical grid plate 11. The radial inner rib plate 16 and the radial middle rib plate 17 are in the shape of a right-angled trapezoid; the shape of the radial outer rib plate 18 is a right triangle, and bolt holes 19 are formed at the joints of the vertical grid plate 11, the horizontal grid plate 12, the radial outer rib plate 18 and the double lifting lugs 5; the right-angle sides of the radial inner rib plate 16 and the radial middle rib plate 17 and one right-angle side of the radial outer rib plate 18 are welded with the straight groove 9 on the annular supporting seat 8. The overflowing edge forces of the small arc rib 13, the middle arc rib 14, the large arc rib 15, the radial inner rib 16, the radial middle rib 17, the radial outer rib 18, the vertical grid plate 11 and the horizontal grid plate 12 are chamfered into streamline cambered surfaces.
Examples
According to the ecological water intake conical trash rack, as shown in figures 1-5, in the embodiment, a steel plate ring 4 is embedded in a water intake 3 of an ecological water intake pipe, double lifting lugs 5 which are annularly arranged are arranged on the steel plate ring 4, and a conical trash rack 7 is arranged on the double lifting lugs 5; the conical trash rack 7 is connected with the double lifting lugs 5 through bolts 6; the conical trash rack 7 is a lattice type cone formed by welding an annular supporting seat 8, a cross-shaped main grid 10, annular uniformly arranged radial inner rib plates 16, radial middle rib plates 17, radial outer rib plates 18, annular uniformly arranged small arc rib plates 13, middle arc rib plates 14 and large arc rib plates 15; the front end face and the rear end face of the flow surface of the cross-shaped main grid 10, the radial outer rib plates 18, the radial middle rib plates 17, the radial inner rib plates 16, the small arc rib plates 13, the middle arc rib plates 14 and the large arc rib plates 15 which are uniformly arranged in an annular mode are streamline structures; the ecological water intake pipe behind the steel plate ring 4 adopts an equal-diameter pipe 2 or a reducing pipe 1 with a large front end and a small rear end; the annular supporting seat 8 is provided with a straight groove 9 which is uniformly distributed with a cross main grid 10, a radial outer rib plate 18, a radial middle rib plate 17 and a radial inner rib plate 16 in an annular manner; the double lifting lugs 5 are provided with bolt holes 19; the cross-shaped main grid 10 and the radial outer rib plate 18 are provided with bolt holes 19 corresponding to the positions of the double lifting lugs 5; the cross-shaped main grid 10, the radial outer rib plates 18, the radial middle rib plates 17 and the radial inner rib plates 16 which are uniformly arranged in a ring shape are embedded into the straight grooves 9 and then are firmly welded with the two sides of the ring-shaped supporting seat 8.
Claims (4)
1. A conical trash rack of an ecological water intake comprises an ecological water intake pipe positioned in a dam body, wherein the ecological water intake pipe is a reducing pipe (1) or an equal-diameter pipe (2); the method is characterized in that: a steel plate ring (4) is pre-embedded in a water intake (3) of the ecological water intake pipe, a group of double lifting lugs (5) which are uniformly distributed along the circumference are arranged on the outer side of the steel plate ring (4), and the double lifting lugs (5) are connected with a conical trash rack (7) through bolts (6); the conical trash rack (7) comprises an annular supporting seat (8), and a group of straight grooves (9) which are uniformly distributed along the circumference are formed in the annular supporting seat (8); the annular supporting seat (8) is provided with a cross-shaped main grid (10); the cross-shaped main grid (10) comprises a vertical grid plate (11); two surfaces of the vertical grid plate (11) are respectively vertically welded with the horizontal grid plate (12); a small arc rib plate (13), a middle arc rib plate (14) and a large arc rib plate (15) are respectively arranged between each vertical grid plate (11) and each horizontal grid plate (12); a radial inner rib plate (16), a radial middle rib plate (17) and a radial outer rib plate (18) are arranged between each vertical grid plate (11) and each horizontal grid plate (12); the radial inner rib plate (16) is positioned between the small arc rib plate (13) and the middle arc rib plate (14), the radial middle rib plate (17) is positioned between the middle arc rib plate (14) and the large arc rib plate (15), and the radial outer rib plate (18) is positioned on the outer side of the large arc rib plate (15); the vertical grid plate (11) is in an equilateral triangle shape, the horizontal grid plate (12) is in a right-angled triangle shape, and the vertical grid plate (11) and the horizontal grid plate (12) are the same in height; one right-angle side of the two horizontal grid plates (12) is symmetrically welded with the two sides of the vertical grid plate (11) to form a cross-shaped main grid (10); the bottom surface of the cross-shaped main grid (10) is welded with a straight groove (9) on the annular supporting seat (8); the radial inner rib plates (16) and the radial middle rib plates (17) are in right-angled trapezoids; the shape of the radial outer rib plate (18) is a right triangle, and bolt holes (19) are arranged at the joints of the vertical grid plate (11), the horizontal grid plate (12) and the radial outer rib plate (18) and the double lifting lugs (5); the right-angle sides of the radial inner rib plate (16) and the radial middle rib plate (17) and one right-angle side of the radial outer rib plate (18) are welded with the straight groove (9) on the annular supporting seat (8).
2. The ecological water intake conical trash rack of claim 1, wherein: the overall shape of the conical trash rack (7) is conical, and the conical surface of the conical trash rack (7) faces the upstream direction.
3. The ecological water intake conical trash rack of claim 1, wherein: the small arc rib plates (13), the middle arc rib plates (14) and the large arc rib plates (15) are all 90-degree arc plates; the heights of the small arc rib plates (13), the middle arc rib plates (14) and the large arc rib plates (15) are the same as the heights of the corresponding welding parts of the vertical grid plates (11).
4. The ecological water intake conical trash rack of claim 1, wherein: the overflowing edges of the small arc rib plates (13), the middle arc rib plates (14), the large arc rib plates (15), the radial inner rib plates (16), the radial middle rib plates (17), the radial outer rib plates (18), the vertical grid plates (11) and the horizontal grid plates (12) are chamfered into streamline arc surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711072768.XA CN107794885B (en) | 2017-11-03 | 2017-11-03 | Ecological water intake conical trash rack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711072768.XA CN107794885B (en) | 2017-11-03 | 2017-11-03 | Ecological water intake conical trash rack |
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| Publication Number | Publication Date |
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| CN107794885A CN107794885A (en) | 2018-03-13 |
| CN107794885B true CN107794885B (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711072768.XA Active CN107794885B (en) | 2017-11-03 | 2017-11-03 | Ecological water intake conical trash rack |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356120B (en) * | 2018-12-10 | 2024-02-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Hemispherical dirt blocking structure of sewer pipeline |
| CN109371930B (en) * | 2018-12-10 | 2024-01-23 | 中国电建集团贵阳勘测设计研究院有限公司 | Bulb-shaped dirt blocking structure of sewer pipeline |
| CN110374069B (en) * | 2019-07-15 | 2024-02-13 | 中国电建集团贵阳勘测设计研究院有限公司 | Cylindrical fixed trash rack for water inlet and water outlet |
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| US7441989B2 (en) * | 2005-09-09 | 2008-10-28 | Walter Fleming | Beaver control device for a culvert pipe |
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| CN204755002U (en) * | 2015-07-16 | 2015-11-11 | 中国长江电力股份有限公司 | Spiral case water intaking pipeline trash rack |
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