CN105155489A - Retractable vertical-seam inlet flush gallery - Google Patents
Retractable vertical-seam inlet flush gallery Download PDFInfo
- Publication number
- CN105155489A CN105155489A CN201510340324.4A CN201510340324A CN105155489A CN 105155489 A CN105155489 A CN 105155489A CN 201510340324 A CN201510340324 A CN 201510340324A CN 105155489 A CN105155489 A CN 105155489A
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- China
- Prior art keywords
- inlet
- import
- port
- water
- water inlet
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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
Abstract
The invention discloses a retractable vertical-seam inlet flush gallery, and relates to the field of water resources and hydropower engineering, and provides a flush gallery whose water inlets are not easy to block, and sediment in front of each water inlet can flow away. The retractable vertical-seam inlet flush gallery comprises a main gallery and a plurality of water inlets arranged along a water flow direction. The water inlets are communicated with the main gallery. The water inlet comprises a rectangular inlet front port and a rectangular inlet rear port. Shapes and sizes of the inlet front ports are the same, and height of the inlet front port is larger than width. Width of the inlet rear port is consistent with the width of the inlet front port. The height of the inlet rear port is smaller than the height of the inlet front port. Height of the inlet rear port on flow downstream is smaller than the height of the inlet rear port on flow upstream. Contraction ratios of the water inlets are different, so flow velocity differences of the water inlets are obviously reduced, and the water inlet on the upstream end of the gallery can satisfy desilting requirement. Height of the water inlets is relatively large, and conditions of complete sediment blocking are not easy to occur.
Description
Technical field
The present invention relates to Hydraulic and Hydro-Power Engineering field, particularly relate to a kind of contraction type perps import flush gallery.
Background technology
For the water channeling type power station of heavily silt-carrying river, the water diversion and sand control problem of head pivot is very outstanding, directly affects the safe operation of unit.In order to avoid rough sand crosses machine, need to arrange sand prevention desilting works, most silt can be tackled side by side to downstream in the defence line be made up of sediment trapping bank, bundle waterwall and scouring sluice, but fraction silt climbs over sediment trapping bank to be difficult to avoid, if unconditional sand discharge after intake, then need to arrange desilting works before intake.
Due to intake and the riverbed discrepancy in elevation less, conventional sand duct is difficult to play a role, desilting works many employings flush gallery before intake, it is arranged in below intake, adopt dispersion import, concentrate the pattern of outlet, arrange multiple import along water (flow) direction, the sand surfing funnel that each import is formed is connected with each other, although the sand surfing of single import is limited in scope, the sand surfing problem before multiple import connects together and can solve intake.
In the engineering that built water intaking width is less, the water inlet that flush gallery many employings the ratio of width to height is suitable or vertical seam type water inlet, there is following problem in these two kinds of import patterns: water inlet easy silt, blocking when flood season, sand content was larger that 1 the ratio of width to height is suitable; Though 2 conventional vertical seam type water inlets not easily silt up, along with the increase of water inlet quantity, each water inlet inbound traffics distributional difference increases, and the flow velocity of gallery upstream extremity reduces, and the silt before part water inlet can not be drained.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of water inlet not easily to block, the flush gallery that before each water inlet, silt all can be drained.
In order to solve the problem, the technical scheme adopted is: multiple water inlets that contraction type perps import flush gallery comprises Main Corridor road and arranges along water (flow) direction, and water inlet is communicated with Main Corridor road; Water inlet comprises the import front port of rectangle and the import rear port of rectangle; Each import front port shape is identical with size, and import front port height is greater than width; Import rear port width is consistent with import front port width, and import rear port height is less than import front port height, and the import rear port height being positioned at current downstream is less than the import rear port height being positioned at current upstream.
Further: the upper wall surface of water inlet is plane or arcwall face.
Further: the lower wall surface of water inlet is plane or arcwall face.
The invention has the beneficial effects as follows: 1 in a fairly large number of situation of water inlet, because water inlet adopts different shrinkage ratios, the flow velocity difference of each water inlet is obviously reduced, and the water inlet of gallery upstream extremity also can meet sand discharge requirement, can drain the silt before whole intake; 2 due to highly comparatively large, and the situation of the complete shutoff of silt not easily appears in water inlet.
Accompanying drawing explanation
Fig. 1 is contraction type perps import flush gallery top view;
Fig. 2 is contraction type perps import flush gallery sectional view;
Be labeled as in figure: intake 1, water inlet 2, import front port 2-1, upper wall surface 2-2, import rear port 2-3, lower wall surface 2-4, Main Corridor road 3, gate 4.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
As depicted in figs. 1 and 2, multiple water inlets 2 that contraction type perps import flush gallery comprises Main Corridor road 3 and arranges along water (flow) direction, water inlet 2 is communicated with Main Corridor road 3; Water inlet 2 comprises the import front port 2-1 of rectangle and the import rear port 2-3 of rectangle; Each import front port 2-1 shape is identical with size, and import front port 2-1 is highly greater than width; Import rear port 2-3 width is consistent with import front port 2-1 width, and import rear port 2-3 is highly less than import front port 2-1 height, and the import rear port 2-3 being positioned at current downstream is highly less than the import rear port 2-3 height being positioned at current upstream.Main Corridor road 3 and water inlet 2 are arranged to be got below water inlet 1, and gate 4 is for controlling the break-make in Main Corridor road 3.
When the gate 4 of Main Corridor road 3 afterbody is opened, before each water inlet 2, flow rate of water flow all exceedes the initial velocity of shoal materials, silt imports Main Corridor road 3 with current by different water inlets 2, and water sand helically flows advance in Main Corridor road 3, and is exported discharged to downstream by Main Corridor road 3.
Import front port 2-1 refers to the current inlet port of water inlet 2, and import rear port 2-3 refers to the river conjunction in water inlet 2 and Main Corridor road 3.
" import front port 2-1 is highly greater than width " refers to that water inlet 2 is for perps structure, and namely water inlet 2 of the present invention increases relative to prior art height, and the situation of the complete shutoff of silt not easily appears in gallery import.
" import rear port 2-3 is highly less than import front port 2-1 height; the import rear port 2-3 being positioned at current downstream is highly less than the import rear port 2-3 height being positioned at current upstream " refers to that water inlet 2 is the structure of shrinking to direction, Main Corridor road 3, and it is different along water (flow) direction shrinkage ratio, upstream water inlet 2 shrinkage ratio is large, and downstream water inlet 2 shrinkage ratio is little.Because Main Corridor road 3 length is larger, each water inlet 2 is according to same shape, the inbound traffics of downstream water inlet 2 can obviously be greater than upstream extremity water inlet 2, cause upstream extremity water inlet 2 flow velocity less than normal, and adopt the contraction type shape that import rear port 2-1 highly successively decreases, the inbound traffics of upstream extremity water inlet 2 can be increased and reduce the inbound traffics of downstream water inlet 2, reach the object of water inlet 2 flow velocity homogenising, the flow velocity difference of each water inlet 2 is obviously reduced, the water inlet 2 of upstream extremity also can meet sand discharge requirement, can drain the silt before whole intake 1
Water inlet 2 can adopt straight line shrink form usually, but also can adopt curve shrinkage form.Namely the upper wall surface 2-2 of water inlet 2 and lower wall surface 2-4 can be plane or arcwall face.
Claims (3)
1. contraction type perps import flush gallery, the multiple water inlets (2) comprising Main Corridor road (3) and arrange along water (flow) direction, water inlet (2) is communicated with Main Corridor road (3); It is characterized in that: water inlet (2) comprises the import front port (2-1) of rectangle and the import rear port (2-3) of rectangle; Each import front port (2-1) shape is identical with size, and import front port (2-1) is highly greater than width; Import rear port (2-3) width is consistent with import front port (2-1) width, import rear port (2-3) is highly less than import front port (2-1) highly, the import rear port (2-3) being positioned at current downstream be highly less than be positioned at current upstream import rear port (2-3) highly.
2. contraction type perps import flush gallery according to claim 1, is characterized in that: the upper wall surface (2-2) of water inlet (2) is plane or arcwall face.
3. contraction type perps import flush gallery according to claim 1, is characterized in that: the lower wall surface (2-4) of water inlet (2) is plane or arcwall face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510340324.4A CN105155489A (en) | 2015-06-18 | 2015-06-18 | Retractable vertical-seam inlet flush gallery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510340324.4A CN105155489A (en) | 2015-06-18 | 2015-06-18 | Retractable vertical-seam inlet flush gallery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105155489A true CN105155489A (en) | 2015-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510340324.4A Pending CN105155489A (en) | 2015-06-18 | 2015-06-18 | Retractable vertical-seam inlet flush gallery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105155489A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013005A (en) * | 2016-07-13 | 2016-10-12 | 长江水利委员会长江科学院 | Variable cross section desilting gallery system suitable for high-water-depth reservoir |
-
2015
- 2015-06-18 CN CN201510340324.4A patent/CN105155489A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013005A (en) * | 2016-07-13 | 2016-10-12 | 长江水利委员会长江科学院 | Variable cross section desilting gallery system suitable for high-water-depth reservoir |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151216 |