CN204703141U - Contraction type import flush gallery - Google Patents

Contraction type import flush gallery Download PDF

Info

Publication number
CN204703141U
CN204703141U CN201520423784.9U CN201520423784U CN204703141U CN 204703141 U CN204703141 U CN 204703141U CN 201520423784 U CN201520423784 U CN 201520423784U CN 204703141 U CN204703141 U CN 204703141U
Authority
CN
China
Prior art keywords
import
water inlet
port
height
rear port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201520423784.9U
Other languages
Chinese (zh)
Inventor
黄跃
叶茂
吕海燕
王川
蒲云娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PowerChina Chengdu Engineering Co Ltd
Original Assignee
PowerChina Chengdu Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PowerChina Chengdu Engineering Co Ltd filed Critical PowerChina Chengdu Engineering Co Ltd
Priority to CN201520423784.9U priority Critical patent/CN204703141U/en
Application granted granted Critical
Publication of CN204703141U publication Critical patent/CN204703141U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Abstract

The utility model discloses a kind of contraction type import flush gallery, relate to Hydraulic and Hydro-Power Engineering field, provide a kind of water inlet not easily to block, the flush gallery that before each water inlet, silt all can be drained.Multiple water inlets that contraction type import flush gallery comprises Main Corridor road and arranges along water (flow) direction, 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.Water inlet shrinkage ratio is different, and 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; Water inlet height is comparatively large, not easily occurs the situation of the complete shutoff of silt.

Description

Contraction type import flush gallery
Technical field
The utility model relates to Hydraulic and Hydro-Power Engineering field, particularly relates to a kind of contraction type 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.
Utility model content
The technical problems to be solved in the utility model 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 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 beneficial effects of the utility model are: 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 import flush gallery top view;
Fig. 2 is contraction type 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 utility model is further illustrated.
As depicted in figs. 1 and 2, multiple water inlets 2 that contraction type 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 utility model 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 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 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 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.
CN201520423784.9U 2015-06-18 2015-06-18 Contraction type import flush gallery Active CN204703141U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520423784.9U CN204703141U (en) 2015-06-18 2015-06-18 Contraction type import flush gallery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520423784.9U CN204703141U (en) 2015-06-18 2015-06-18 Contraction type import flush gallery

Publications (1)

Publication Number Publication Date
CN204703141U true CN204703141U (en) 2015-10-14

Family

ID=54282767

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520423784.9U Active CN204703141U (en) 2015-06-18 2015-06-18 Contraction type import flush gallery

Country Status (1)

Country Link
CN (1) CN204703141U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110144861A (en) * 2019-06-05 2019-08-20 黄河勘测规划设计研究院有限公司 A kind of the sand discharge structure and method of heavily silt-carrying river natural flow station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110144861A (en) * 2019-06-05 2019-08-20 黄河勘测规划设计研究院有限公司 A kind of the sand discharge structure and method of heavily silt-carrying river natural flow station

Similar Documents

Publication Publication Date Title
CN103882838B (en) A kind of sand discharge method of low water head river channel hinge powerplant intakes
CN102747716B (en) Vertical seam type fishway structure
CN207003391U (en) A kind of water gate energy-dissipating installation
CN101713178B (en) Method for creating three-stage flow passage of meandering riverway in lower Yellow River
CN103498452B (en) The slit structure of high steep Narrow Valleys outlet structure escape works
CN103266583A (en) Bent slope underflow energy dissipation structure of water conservancy and hydropower engineering
CN204703141U (en) Contraction type import flush gallery
CN103882839B (en) A kind of sand flushing system of low water head river channel hinge powerplant intakes
CN201635061U (en) Rectifying structure for lateral drainage
CN103966985A (en) Stilling pool with laterally-effluent revolution and rolling energy dissipation function
CN105155489A (en) Retractable vertical-seam inlet flush gallery
CN203701055U (en) Variable width seam type sand conveying device
CN203977376U (en) Contraction type transverse joint import flush gallery
CN204825802U (en) Compound line type overflow weir
CN108149769B (en) A method of improving Urban Waterlogging pumping plant side unit Inlet flow pattern
CN203821344U (en) Forward water inlet and sand sluicing flush gallery structure of hydropower station
CN112281770B (en) Flood discharge structure adopting bottom hole and surface hole combined flood discharge and energy dissipation
CN203021973U (en) Sand intercepting groove
CN203904944U (en) Desilting system at water inlets of power station
CN109235626B (en) Box-type bidirectional runner with built-in special-shaped thin plate type backflow eliminating device
CN208151985U (en) Sluice " L " type trash rack pier and its " zigzag " arragement construction
CN204849678U (en) Novel butyl dam structure
CN201933471U (en) Double-layer separation flood discharge structure of side spillway
CN204753541U (en) A compound lock chamber structure that is used for narrow intake of mountain area water electrical engineering
CN101705669A (en) Duckbilled thin-plate weir device

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant