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CN109113033A - Prevent silt from entering the built-in draining pump submerged floating sediment trapping bank of intake - Google Patents

Prevent silt from entering the built-in draining pump submerged floating sediment trapping bank of intake Download PDF

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Publication number
CN109113033A
CN109113033A CN201810973033.2A CN201810973033A CN109113033A CN 109113033 A CN109113033 A CN 109113033A CN 201810973033 A CN201810973033 A CN 201810973033A CN 109113033 A CN109113033 A CN 109113033A
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CN
China
Prior art keywords
sediment trapping
snorkeling
case
trapping bank
fixed
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Application number
CN201810973033.2A
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Chinese (zh)
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CN109113033B (en
Inventor
马旭东
钟益华
聂锐华
刘兴年
黄尔
杨克君
张斌
王协康
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Sichuan University
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Sichuan University
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Priority to CN201810973033.2A priority Critical patent/CN109113033B/en
Publication of CN109113033A publication Critical patent/CN109113033A/en
Application granted granted Critical
Publication of CN109113033B publication Critical patent/CN109113033B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B8/00Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/02Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
    • E02B8/023Arresting devices for waterborne materials

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Barrages (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a kind of built-in draining pump submerged floating sediment trapping banks for preventing excess silt from entering intake, the fixed sediment trapping bank of the enclosure cavity formula including fixed setting, the snorkeling case in fixed sediment trapping bank enclosure cavity, the draining pump being arranged in snorkeling case, the elevation sensor and middle control unit for monitoring sedimentation height;The physique structure of snorkeling case and the physique structure of fixed sediment trapping bank enclosure cavity match, and are provided with guide frame part between snorkeling case and fixed sediment trapping bank enclosure cavity and limit the position limiting structure part of snorkeling case floating distance, the snorkeling case is provided with snorkel (1).Submerged floating sediment trapping bank of the present invention, sediment siltation is higher than limitation elevation before sediment trapping bank, and snorkeling case, which floats, increases the elevation of sediment trapping bank, after the completion of interim sand prevention task, in snorkeling case dive to fixed sediment trapping bank enclosure cavity, restores sediment trapping normality.The present invention makes snorkeling case float and sink by changing the water level in snorkeling case, realizes increasing and reducing for sediment trapping bank elevation, easy to operate, feasibility is strong.

Description

Prevent silt from entering the built-in draining pump submerged floating sediment trapping bank of intake
Technical field
The present invention relates to before hydraulic engineering, disaster prevention and mitigation engineering and agricultural water conservancy project etc. more particularly to a kind of intake Sediment siltation is larger, need to temporarily improve the sediment trapping bank of the mountain stream intake of sediment trapping bank height.
Background technique
The mode fetched water from mountain stream, in addition to other than the water intaking of the mid-deep strata of high dam reservoir, more water-supply methods are low Lock water intaking or dam-free water intaking, and based on intake lateral arrangement.Silt enters intake in river in order to prevent, is rationally arranged The position of intake and figure are extremely important, position appropriate setting sediment trapping and sand discharge need to additionally build before intake import Object, wherein sediment trapping building is based on sediment trapping bank.
For mountain stream intake, the silt flux in flood season before intake may be more than engineering design discreet value, Cause excess silt to fall silt before intake sediment trapping bank, could possibly be higher than sediment siltation limitation elevation.For part river channel water power It stands intake, in the diversion and power phase, silt can largely deposit before sediment trapping bank and in reservoir area, drop operation in desilting at low level when flood season When, which, which will largely start or rise, hangs, and part silt may cross sediment trapping bank and enter intake.It is above-mentioned The occurrence of will affect the safe operation of intake, current counter-measure mainly based on manually dredging, there is no effective Engineering measure.
Excess silt enters intake in order to prevent, and in view of the convenience of operation, the present invention is developed built in one kind Draining pump submerged floating sediment trapping bank, until the present invention completes, inventor is not had found also using sediment trapping bank proposed by the invention Correlative study and case history.
Summary of the invention
For the needs of mountain stream intake sediment trapping, prevent silt from entering built in intake the invention proposes a kind of Draining pump submerged floating sediment trapping bank blocks before intake sediment trapping bank for flood season and excess siltation or plays outstanding silt and enter intake, Realizing safe sand, reducing maintenance cost and improving the purpose of engineering operation safety.
The basic idea of the invention is that sediment trapping bank to be designed to the sediment trapping bank of changeable elevation, flood season makes the elevation of sediment trapping bank Increase, the elevation of water intaking phase sediment trapping bank is restored to design altitude again, to solve excess siltation or outstanding mud before flood season sediment trapping bank Sand enters intake.
Basic Design of the invention is that sediment trapping bank is designed to the fixation sediment trapping bank by fixed elevation and can be hidden in water Snorkeling case constitute, by the into or out snorkeling case of water make the dive of snorkeling case or float change sediment trapping bank elevation, solve flood Excess siltation or outstanding silt enter intake before phase sediment trapping bank.
The built-in draining pump submerged floating sediment trapping bank provided by the invention for preventing silt from entering intake, composition include: solid Fixation sediment trapping bank in front of intake on bottom plate in enclosure cavity formula is set calmly, the snorkeling case in fixed sediment trapping bank enclosure cavity, is set Set in snorkeling case draining pump, be arranged in monitored in front of fixed sediment trapping bank sedimentation height elevation sensor and with height The middle control unit that journey sensor and draining pump electricly connect, the physique structure of the physique structure of snorkeling case and fixed sediment trapping bank enclosure cavity Match, and there are gap between snorkeling case and fixed sediment trapping bank enclosure cavity, so as to water enters gap can be by the snorkeling case of emptied of water Float, restricted snorkeling case is set between snorkeling case and fixed sediment trapping bank enclosure cavity in the guide frame of process swing that floats up and down The position limiting structure part of part and limitation snorkeling case floating distance, the snorkeling case are provided with the ventilation that the upper end section design has overflow port Pipe, the position of snorkel overflow port are in flood season and to be located above the water surface when snorkeling case floats up to restraining position and be communicated with the atmosphere.
In order to achieve better technical results, the present invention can also further take following technical measures, the following terms technology Measure can individually be implemented, and can also combine implementation, or even implement together.
In above-mentioned technical proposal of the invention, pays the utmost attention to the fixed setting on fixed sediment trapping bank enclosure cavity bottom plate and be used for branch Support the support pier of snorkeling case;Further, the support pier preferentially takes the support pier of the strip structure of two parallel arrangements.
In above-mentioned technical proposal of the invention, pay the utmost attention to support fixed sediment trapping bank in fixed sediment trapping bank lee side design branch Branch support pier;Further, branch is supported into pier and fixed sediment trapping bank is designed as overall structure, and prop up support pier preferentially take it is up-narrow and down-wide The branch of slope structure supports pier.
In above-mentioned technical proposal of the invention, pay the utmost attention to the enclosure cavity for fixing sediment trapping bank being designed as rectangle structure Enclosure cavity is provided with limitation snorkeling case in the guide frame part and limit knot for the process swing that floats up and down in the four direction of enclosure cavity Component;Further, two secondary guide frame parts are provided in the four direction of enclosure cavity, the longitudinal direction of enclosure cavity is provided with two Secondary position limiting structure part is provided with a secondary position limiting structure part in the short side direction of enclosure cavity;Limitation snorkeling case is put during floating up and down Dynamic guide frame part preferentially takes the I-steel for being fixed at fixed sediment trapping bank enclosure cavity inner wall, and I-steel, which is partially submerged into, to be blocked In husky bank enclosure cavity inner wall.
In above-mentioned technical proposal of the invention, position limiting structure part can be taken by being fixed in fixed sediment trapping bank enclosure cavity First limiting card on wall surface top and the second limiting card for being fixed at snorkeling box outer wall face lower part are constituted.Position limiting structure part There are also other multiple structural forms for form, such as will limit and be oriented to combined guide and limit bar assembly.When limit is tied Component is taken to be made of first limiting card and second limiting card, and the first limit is stuck in fixed sediment trapping bank enclosure cavity inner wall The position on top is the amplitude that snorkeling case is no more than design in the limitation lower swing of guide frame component.
In above-mentioned technical proposal of the invention, the high-priority of snorkeling case is designed to, is stayed under water in snorkeling case and is blocked in fixation In husky bank enclosure cavity, the case top of snorkeling case is flushed with the Kan Ding of fixed sediment trapping bank.
The built-in draining pump submerged floating sediment trapping bank provided by the invention for preventing silt from entering intake, the original substantially of operation Reason is poured water to change the relative value of the gravity of snorkeling cabinet and buoyancy using draining pump drainage or by blow vent, realizes snorkeling case Emersion or slip into fixed sediment trapping bank enclosure cavity, wherein snorkeling case, which floats, realizes the interim purpose for increasing sediment trapping bank elevation. Submerged floating sediment trapping bank actual motion of the invention is formed by floating with two processes of staying under water.
The original state of submerged floating sediment trapping bank, snorkel and water-filled snorkeling case are completely disposed under water, and snorkeling case is heavy It dives in fixed sediment trapping bank enclosure cavity, is supported on the support pier of enclosure cavity bottom;When running in flood season or sand discharge, Shamian Island elevation sensing If device monitors that the sediment siltation elevation before sediment trapping bank is higher than design limitation elevation, after drop operation in desilting at low level, block Silt still persistently deposits or occurs partially crossing before husky bank, then starts the elevation that the present invention increases sediment trapping bank.
Submerged floating sediment trapping bank, which floats, to be run.Water level is reduced to snorkel blow vent and big gas phase before intake need to be met first Then logical prerequisite gradually excludes the water in snorkeling case using control unit control draining pump, the buoyancy suffered by the snorkeling case After the gravity summation of water body in cabinet and case (i.e. F > G), snorkeling case can under the guiding of guided way component gradually on It is floating, until the limiting card on snorkeling cabinet contacts fixed limiting card.The maximum height of floating is the height difference of two limiting cards.Above-mentioned row Buoyancy during water and Gravity calculation can the formula as shown in formula (1)~formula (8) calculated, the control condition of floating-upward process is F > G.Furthermore, it is necessary to which, it is emphasized that in order to embody the timeliness of snorkeling case floating, the present invention is complete by water body in snorkeling cabinet The time of exclusion is as one of control condition, it is proposed that the time is 10~15min, preferably 10min, using formula (9)~formula (11) it is calculated, then it can be concluded that the draining pump number of units for needing to be arranged in snorkeling cabinet.Draining pump is suggested symmetrically Distribution.
Submerged floating sediment trapping bank dive process.The original state of submerged floating sediment trapping bank is submerged floating sediment trapping bank floating-upward process Final state.After flood season low water level sand surfing end of run or reservoir draw husky end of run, water level can be gradually risen and extensive before intake It is multiple to normal pool level, after water level is higher than the overflow aperture being preset on snorkel, water flow from overflow hole opening's edge snorkel into Enter snorkeling case and increase snorkeling case gravity, and then make the gradually dive of snorkeling case, after water level floods snorkel completely, water is flowed into The speed for entering snorkeling cabinet opposite can be accelerated, and the speed of snorkeling caisson sinking is also accelerated therewith, finally stays under water and is supported on enclosure cavity bottom Support pier on, restore to float before original state.Buoyancy and Gravity calculation during dive can be by formula (1)~formulas (8) shown in, Basic Controlling Conditions are F < G.It should be noted that the time of dive process and being not required to determine accurate, only need true Water energy enters buoyancy tank inside from overflow aperture after water conservation position increases.
The present invention mainly has the advantage that
(1) the sand elevation of the invention that sediment trapping bank before achievable increase intake is increased by control snorkeling case, Ke Yiqi To the effect of interim sand.
(2) present invention only passes through the operation such as water level adjustment, the draining of draining pump and the water inlet in overflow aperture before intake The floating and sinking that can realize snorkeling case then solve the problems, such as flood season interim sediment trapping, have easy to operate, feasibility it is strong, The advantages that applied widely.
The calculation formula that engineering design of the present invention is related to has:
F=ρ gVap (1)
GaagVa (2)
Va=Sa*da (3)
GbbSb*db (4)
Gc=mc*g (5)
Gd=ρ * g*Vd (6)
GeegVe (7)
G=Ge+Gb+Gc+Gd (8)
Q1=P1η/ρgh (9)
Q=n*Q1 (10)
T=Q/ (vc*60) (11)
The meaning of each parameter is as follows in above-mentioned formula:
The buoyancy that F- snorkeling case is subject to, N;
ρ-water density, kg/m3
G- acceleration of gravity, 9.8m/s2
VapSnorkeling case displacement of volume, m3
GaThe quality of inner bin, kg;
ρaSteel plate density, kg/m3
VaThe volume of-snorkeling tank shell, m3
SaThe external surface area of-snorkeling tank shell, m2
daThe thickness of-snorkeling tank shell, m;
Gb- snorkel gravity, N;
ρb- snorkel density, kg/m3
Sb- snorkel external surface area, m2
dbThe thickness of-snorkel, m;
Gc- water pump gravity, N;
mc- water pump quality, kg;
GdRemaining water gravity, N in-snorkeling case;
VdThe volume of remaining water, kg/m in snorkeling case3
GeLower limit component gravity, N;
Ve- lower limit component volume, m3;
G-snorkeling case total force, N;
Q1- single pump capacity, m3/s;
The single pump efficiency of η-, nothing;
P1- single pump power, w;
The single pump head of h-, m;
N-water pump sum, it is a;
The total flow that draws water of Q-n water pump, m3/s;
T-n pumping for water pump time, min;
Vc- sediment trapping the bank that can float draws water volume, m3
Detailed description of the invention
Fig. 1 is the overall schematic for being provided with layout for water intake mode of the invention.
Fig. 2-1 is structural schematic diagram of the snorkeling case in state of avaling in sediment trapping bank of the present invention.
Fig. 2-2 is the structural schematic diagram that the snorkeling case in sediment trapping bank of the present invention is in floating undulating state.
Fig. 3 is in Fig. 2-1 I-I to the schematic diagram of the section structure.
Fig. 4 is in Fig. 3 II-II to the schematic diagram of the section structure.
Fig. 5 is part B enlarged structure schematic diagram in Fig. 1.
Fig. 6 is Local C enlarged structure schematic diagram in Fig. 2-1.
In above-mentioned attached drawing, the mark object of each shown by reference numeral is: 1- snorkel;2- blow vent;3- snorkeling case;4- is fixed Sediment trapping bank;5- elevation sensor;Unit is controlled in 6-;7- draining pump;8- intake upstream face barricade;9- headstock gear;10- water intaking Mouthful;11- water intaking regulating gate;12- I-steel;The first limiting card of 13-;The second limiting card of 14-;15- branch supports pier;16- support pier.
Specific embodiment
A specific embodiment of the invention is provided with reference to the accompanying drawing, and by specific embodiment to provided by the invention The built-in draining pump submerged floating sediment trapping bank for preventing silt from entering intake is further described.It is important to note that this The specific embodiment of invention is not limited to form described in embodiment.
In the specific embodiment below, the direction term being previously mentioned, such as: upper and lower, left and right, front or rear etc., It is only the direction with reference to attached drawing.Therefore, use direction term is of the invention for ease of description, is not intended to limit the invention.
The present embodiment prevents silt from entering the built-in draining pump submerged floating sediment trapping bank of intake, and structure such as attached drawing 1- is attached Shown in Fig. 6, by being fixed at the fixation sediment trapping bank 4 of enclosure cavity formula on 10 front bottom plate of intake, being located at fixed sediment trapping bank enclosure cavity The draining pump 7 being arranged in snorkeling case, the height that sedimentation height is monitored in front of fixed sediment trapping bank is arranged in interior snorkeling case 3 Journey sensor 5 and the middle control unit 6 electricly connected with elevation sensor and draining pump fix bottom in sediment trapping bank rectangle enclosure cavity The bar shaped support pier 16 for being used to support snorkeling case of two parallel arrangements is fixedly installed on plate;The physique structure of snorkeling case and solid The physique structure for determining sediment trapping bank enclosure cavity matches, and there are sufficiently large gap between snorkeling case and fixed sediment trapping bank enclosure cavity, with Just water enters gap and can float the snorkeling case after draining, and between snorkeling case and fixed sediment trapping bank enclosure cavity, each party sets vertically Two I-steel 12 as guide rail are set, in the secondary position limiting structure part of one side of long side, that is, sediment trapping bank width direction setting two, in short side The secondary position limiting structure part of one side, that is, sediment trapping bank thickness direction setting one, the position limiting structure part are enclosed by being fixed at fixed sediment trapping bank First limiting card 13 on intracavitary wall surface top and the second limiting card 14 for being fixed at snorkeling box outer wall face lower part are constituted;It is described Snorkel 1 is provided on snorkeling case, the upper end section design of snorkel has blow vent 2, and the position of blow vent 2 is on flood season snorkeling case It is located above the water surface when floating to restraining position.Blow vent 2 is also the water inlet that water enters snorkeling caisson sinking simultaneously;In fixed sediment trapping The branch that bank lee side design branch supports fixed sediment trapping bank supports pier 15, and it is overall structure that the branch, which supports pier and fixed sediment trapping bank, and branch supports pier Structure be up-narrow and down-wide slope structure branch support pier.

Claims (10)

1. a kind of built-in draining pump submerged floating sediment trapping bank for preventing silt from entering intake, it is characterised in that: including fixed setting Enclosure cavity formula fixed sediment trapping bank (4), the snorkeling case (3) in fixed sediment trapping bank enclosure cavity, setting exist on bottom plate in front of the intake Draining pump (7) in snorkeling case, be arranged in the elevation sensor (5) that sedimentation height is monitored in front of fixed sediment trapping bank and with The middle control unit (6) that elevation sensor and draining pump electricly connect, the shape of the physique structure of snorkeling case and fixed sediment trapping bank enclosure cavity Body structure matches, and there are gap between snorkeling case and fixed sediment trapping bank enclosure cavity, so as to water enters gap can will be after draining Snorkeling case floats, and restricted snorkeling case leading in the process swing that floats up and down is arranged between snorkeling case and fixed sediment trapping bank enclosure cavity To the position limiting structure part of structural member and limitation snorkeling case floating distance, the snorkeling case, which is provided with the upper end section design, overflow port (2) snorkel (1), the position of overflow port (2) be located above the water surface in flood season and when snorkeling case floats up to restraining position with it is big Gas connection.
2. the built-in draining pump submerged floating sediment trapping bank according to claim 1 for preventing silt from entering intake, feature exist In: the support pier (16) of support snorkeling case is fixedly installed on fixed sediment trapping bank enclosure cavity bottom plate.
3. the built-in draining pump submerged floating sediment trapping bank according to claim 2 for preventing silt from entering intake, feature exist In: the support pier is the support pier of the strip structure of two parallel arrangements.
4. the built-in draining pump submerged floating sediment trapping bank according to claim 1 for preventing silt from entering intake, feature exist In: pier (15) are supported in the branch that fixed sediment trapping bank lee side design branch supports fixed sediment trapping bank.
5. the built-in draining pump submerged floating sediment trapping bank according to claim 4 for preventing silt from entering intake, feature exist In: branch supports pier and fixed sediment trapping bank is overall structure, and branch supports the branch that pier is up-narrow and down-wide slope structure and supports pier.
6. the built-in draining pump submerged floating sediment trapping bank according to one of claims 1 to 5 for preventing silt from entering intake, Be characterized in that: the enclosure cavity of fixed sediment trapping bank is the enclosure cavity of rectangle structure, is provided with limitation snorkeling in the four direction of enclosure cavity The guide rail structure part and position limiting structure part that the process that floats up and down in case is swung.
7. the built-in draining pump submerged floating sediment trapping bank according to claim 6 for preventing silt from entering intake, feature exist In: two secondary guide frame parts are provided in the four direction of enclosure cavity, the longitudinal direction of enclosure cavity is provided with two secondary position limiting structures Part is provided with a secondary position limiting structure part in the short side direction of enclosure cavity.
8. the built-in draining pump submerged floating sediment trapping bank according to claim 7 for preventing silt from entering intake, feature exist In: limitation snorkeling case is to be fixed at fixed sediment trapping bank enclosure cavity inner wall in the guide frame part for the process swing that floats up and down I-steel (12).
9. the built-in draining pump submerged floating sediment trapping bank according to claim 6 for preventing silt from entering intake, feature exist In: the position limiting structure part is set by the first limiting card (13) and fixation for being fixed at fixed sediment trapping bank enclosure cavity inner wall top Set the second limiting card (14) composition in snorkeling box outer wall face lower part.
10. the built-in draining pump submerged floating sediment trapping bank according to claim 9 for preventing silt from entering intake, feature exist In: the first limit is stuck in the position on fixed sediment trapping bank enclosure cavity inner wall top and is no more than for snorkeling case in the limitation lower swing of guide rail The amplitude of design.
CN201810973033.2A 2018-08-24 2018-08-24 Submerged floating type sediment trapping bank with built-in drainage pump for preventing sediment from entering water intake Expired - Fee Related CN109113033B (en)

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CN109113033B CN109113033B (en) 2020-04-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113389178A (en) * 2021-06-16 2021-09-14 清华大学 Intelligent lifting stoplog silt control device and silt control method applying same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1060871A (en) * 1996-08-21 1998-03-03 Koken Boring Mach Co Ltd Method of dam renewal
CN104631396A (en) * 2015-03-03 2015-05-20 山东农业大学 Superposed water taking gate
CN104863097A (en) * 2014-02-20 2015-08-26 天津大学 Flexible sand stop curtain structure
CN106087899A (en) * 2016-08-10 2016-11-09 河南省水利勘测设计研究有限公司 Aperture width scalable float type maintenance steel-slag sand

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1060871A (en) * 1996-08-21 1998-03-03 Koken Boring Mach Co Ltd Method of dam renewal
CN104863097A (en) * 2014-02-20 2015-08-26 天津大学 Flexible sand stop curtain structure
CN104631396A (en) * 2015-03-03 2015-05-20 山东农业大学 Superposed water taking gate
CN106087899A (en) * 2016-08-10 2016-11-09 河南省水利勘测设计研究有限公司 Aperture width scalable float type maintenance steel-slag sand

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113389178A (en) * 2021-06-16 2021-09-14 清华大学 Intelligent lifting stoplog silt control device and silt control method applying same
CN113389178B (en) * 2021-06-16 2023-12-05 清华大学 Intelligent lifting stop log silt control device and silt control method using same

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Inventor after: Ma Xudong

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