CN103741650B - Flood control multipurpose suspension dam - Google Patents

Flood control multipurpose suspension dam Download PDF

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Publication number
CN103741650B
CN103741650B CN201410048207.6A CN201410048207A CN103741650B CN 103741650 B CN103741650 B CN 103741650B CN 201410048207 A CN201410048207 A CN 201410048207A CN 103741650 B CN103741650 B CN 103741650B
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China
Prior art keywords
dam body
dam
slide carriage
inner chamber
guard tube
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Expired - Fee Related
Application number
CN201410048207.6A
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Chinese (zh)
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CN103741650A (en
Inventor
李遵栋
苑斌
贾海
王伟建
王宁
李长海
孙丽娟
王德利
郝彩萍
苏琳琳
徐玉堂
刘海泉
陈彬
韩文峰
孟祥文
曹洪海
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Shandong Huanghe River Afairs Bureau Huanghe River Committee Of Water Conservanc
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Shandong Huanghe River Afairs Bureau Huanghe River Committee Of Water Conservanc
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Application filed by Shandong Huanghe River Afairs Bureau Huanghe River Committee Of Water Conservanc filed Critical Shandong Huanghe River Afairs Bureau Huanghe River Committee Of Water Conservanc
Priority to CN201410048207.6A priority Critical patent/CN103741650B/en
Publication of CN103741650A publication Critical patent/CN103741650A/en
Application granted granted Critical
Publication of CN103741650B publication Critical patent/CN103741650B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The present invention opens and discloses a kind of flood control multipurpose suspension dam, comprises dam body, dam body installs generating set, inner chamber is provided with in dam body, the bottom of inner chamber is vertically provided with guard tube, and the lower end of guard tube is connected with dam body and communicates with the external world, and the upper end of guard tube communicates with inner chamber; The side of dam body is installed and is chosen slide carriage, and upper edge and the dam body of choosing slide carriage are hinged, and movable pulley is installed in the lower edge of choosing slide carriage.It utilizes adjustment great river, portable suspension dam to slip gesture, alleviates pressure of flood, improves engineering anti-flood capacity, guarantee engineering and beach district people life property safety.It can be installed arbitrarily in discovery dangerous situation section, and simple and easy to do, cost is lower, and finishes using and can reclaim, and can reuse.Experimental results demonstrate, application suspension dam technology, cost of can speedily carrying out rescue work under square one can reduce by 50%, and greatly minimizing is speedily carried out rescue work the time, ensures the Yellow River safe flood further.The present invention also has structure advantage simple, cheap for manufacturing cost and easy to use.

Description

Flood control multipurpose suspension dam
Technical field
The present invention relates to a kind of flood control multipurpose suspension dam.
Background technology
Volt autumn large flood is main flood period of Lower Reaches of The Yellow River, and the feature of Yellow River Floods is that the oncoming force is violent, and leading time is short, threatens large to downstream, often causes the strong Scour and Accretion in riverbed and current to slip the sharply change of gesture, washes away dyke, dangerous section or occur new dangerous situation.Sometimes there is dangerous situation in many places dangerous section or dyke, hard to guard against, causes the nervous situation of defending and speedily carrying out rescue work, need a large amount of manpower and materials to rescue and protect.Water course structure, such as dangerous section, river control works, be mostly positioned at main flow and be close to or push up and rush part, and large to current interference, the water impact of bearing, circulation scour strongly, cause root stone to wander away, and then cause smooth stone to glide, dam shore pier is bitten, and occurs dangerous situation.The current emergency control method conventional for flood hazard and means are all for relying on based on embankment, the mode extended to Ha Noi, such as dyke, by slipping, is built dangerous section and is kept out, chooses and slip, dangerous section's river control works be in danger then jackstone, galvanized wire cage or Liu Shi pillow reinforce, take face-to-face, firmly to hard trial of strength with flood, the manpower and materials of dangerous situation of rescuing and protecting meeting at substantial, and danger is higher, effect of speedily carrying out rescue work is poor.
Summary of the invention
Object of the present invention, be to provide a kind of flood control multipurpose suspension dam, it changes traditional flood control is rely on embankment, the mode extended to Ha Noi, adopt directly on Jian Zuo dam, korneforos, change great river part and slip gesture, reduce and slip greatly the intensity of directly washing away dangerous section, lose to reduce root rock glacier, slow down dangerous situation or avoid the generation of dangerous situation.Its advantage is that the speed of speedily carrying out rescue work is fast, and cost is low, can not run off because of current scour, and can recycle and reuse.Thus, prior art Problems existing can be solved.In addition, can be used as harmony height water level before gates, improve low water stage and draw yellow water supply conditions etc.
The object of the invention is to be achieved through the following technical solutions: flood control multipurpose suspension dam, comprise dam body, dam body installs generating set, inner chamber is provided with in dam body, the bottom of inner chamber is vertically provided with guard tube, the lower end of guard tube is connected with dam body and communicates with the external world, and the upper end of guard tube communicates with inner chamber; The side of dam body is installed and is chosen slide carriage, and upper edge and the dam body of choosing slide carriage are hinged, and movable pulley is installed in the lower edge of choosing slide carriage; Hoist engine is installed in one end of inner chamber, and two fixed pulleys are installed in the top of guard tube, and the steel cable of hoist engine is connected with dam body successively after a fixed pulley, movable pulley, another fixed pulley, and the part of steel cable between fixed pulley and movable pulley is positioned at guard tube; The upper surface of dam body is positioned at end positions and is respectively provided with second tension winch, between two the second tension winch, two the first tension winch are installed, the hawser of each first tension winch and the second tension winch is provided with anchor, the rotor shaft direction of the first tension winch or conllinear parallel with the long axis direction of dam body, two hangers are respectively installed in the front and back of dam body, and on hanger, left and right is each installs an on-hook.
For realizing object of the present invention further, can also realize by the following technical solutions: described dam body installs suction pump, so as to water filling in inner chamber or by inner chamber to extracardiac pumping.Be horizontally disposed with dividing plate in described inner chamber, inner chamber is divided into epicoele and cavity of resorption by dividing plate; The upper end of guard tube communicates with epicoele.Described slide carriage of choosing is arc, to match with the sidewall of dam body.Pulley is provided with, to prevent transition friction between steel cable and guard tube in described guard tube.Installation shaft on the sidewall of described guard tube, one end of axle is positioned at inner chamber and installs long connecting rod, long connecting rod installs ball float, the other end of axle is positioned at guard tube and installs short connecting rod, and short connecting rod installs live-rollers, and the free end choosing slide carriage is provided with hook, hook coordinates with live-rollers, the opening part of hook is respectively equipped with crankle portion and inclined-plane, and crankle portion tilts to opening direction, and the inner on inclined-plane is higher than its outer end.Described choosing on slide carriage offers outfall, and choose inside slide carriage and install baffle plate, baffle plate blocks outfall completely, and baffle plate upper end is with to choose slide carriage hinged.Described dam body is installed two to the second directive wheel, and the second directive wheel is positioned at the side of dam body, the hawser one_to_one corresponding on the second directive wheel and the first tension winch.
Good effect of the present invention is: it utilizes adjustment great river, portable suspension dam to slip gesture, alleviates pressure of flood, improves engineering anti-flood capacity, guarantee engineering and beach district people life property safety.It can be installed arbitrarily in discovery dangerous situation section, and simple and easy to do, cost is lower, and finishes using and can reclaim, and can reuse.Experimental results demonstrate, application suspension dam technology, cost of can speedily carrying out rescue work under square one can reduce by 50%, and greatly minimizing is speedily carried out rescue work the time, ensures the Yellow River safe flood further.The present invention also has structure advantage simple, cheap for manufacturing cost and easy to use.
Accompanying drawing illustrates:
Fig. 1 is the structural representation on flood control multipurpose suspension dam of the present invention; Fig. 2 is the sectional view of Fig. 1 along A-A, and Fig. 3 is the sectional view along A-A after Fig. 1 launches, and Fig. 4 is the cutaway view Amplified image of Fig. 2 along B-B, and Fig. 5 is the cutaway view Amplified image of Fig. 3 along C-C; Fig. 6 is that the A of Fig. 5 is to structure for amplifying schematic diagram; Fig. 7 is the I partial enlargement structural representation of Fig. 4; Fig. 8 is that the B of Fig. 7 is to structure for amplifying schematic diagram; Fig. 9 is that the C of Fig. 7 is to structure for amplifying schematic diagram; Figure 10 is the schematic diagram correcting suitable dike flood passage with suspension dam; Figure 11 is the schematic diagram correcting oblique river Yokogawa with suspension dam; Figure 12 is the schematic diagram of speedily carrying out rescue work with suspension dam.
Reference numeral: 1 hanger 2 on-hook 3 first directive wheel 4 dam body 5 first tension winch 6 generating set 7 suction pump 8 hawser 9 guard tube 10 fixed pulley 11 movable pulley 12 steel cable 13 is chosen river course 17 dangerous section 18 that slide carriage 14 second directive wheel 15 second tension winch 16 meets wire processed dam 19 levee crown 20 control that suspends and led 21 and link up with 30 live-rollers 32 axle 33 inclined-plane 34, crankle portion 31 short connecting rod 35 long connecting rod 36 ball float 37 baffle plate 38 outfall 39 slip greatly 40 pulleys along river course, oblique river 24, river flood passage 22 beach district 23 25 region 26 inner chamber 27 hoist engine 28 dividing plate 29 of speedily carrying out rescue work.
Detailed description of the invention
Flood control multipurpose suspension dam of the present invention, as shown in Figure 2, it comprises dam body 4, dam body 4 is installed generating set 6.Inner chamber 26 is provided with in dam body 4.The bottom of inner chamber 26 is vertically provided with guard tube 9.The lower end of guard tube 9 is connected with dam body 4 and communicates with the external world, and the upper end of guard tube 9 communicates with inner chamber 26.Side with regard to guard tube 9 dam body 4 is installed and is chosen slide carriage 13.Upper edge and the dam body 4 of choosing slide carriage 13 are hinged, and movable pulley 11 is installed in the lower edge of choosing slide carriage 13.Choose slide carriage 13 can relatively launch as shown in Figure 5 or close as shown in Figure 4 by dam body 4.Hoist engine 27 is installed in one end of inner chamber 26.Two fixed pulleys 10 are installed in the top of guard tube 9.The steel cable 12 of hoist engine 27 is connected with dam body 4 successively after a fixed pulley 10, movable pulley 11, another fixed pulley 10, and the part of steel cable 12 between fixed pulley 10 and movable pulley 11 is positioned at guard tube 9.Guard tube 9 one aspect provides a passage stretched out outside dam body 4 for steel cable 12, hoist engine 27 can be controlled flexibly to choosing slide carriage 13, on the other hand, as long as guard tube 9 can guarantee the upper port of river water level lower than guard tube 9, river just cannot inject in inner chamber 26 by guard tube 9, thus, significantly improve the security performance on suspension dam.Fixed pulley 10, movable pulley 11 and steel cable 12 form movable pulley mechanism, can reduce the load of steel cable 12 and hoist engine 27.When choosing the relative dam body 4 of slide carriage 13 and launching, the part of steel cable 12 can be stretched out downwards outside guard tube 9 by follower pulley 11.Hoist engine 27 controls to choose the opening and closing of slide carriage 13 by steel cable 12: hoist engine 27 by release steel cable 12 make to choose slide carriage 13 relatively dam body 4 launch, to increase suspension dam, make to choose slide carriage 13 again to reset the side of withdrawal dam body 4 by tightening up steel cable 12.As shown in Figure 1, the upper surface of dam body 4 is positioned at end positions and is respectively provided with second tension winch 15, between two the second tension winch 15, two the first tension winch 5 are installed, the hawser of each first tension winch 5 and the second tension winch 15 is provided with anchor, to be fixedly secured in dam body 4 and riverbed.The rotor shaft direction of the first tension winch 5 or conllinear parallel with the long axis direction of dam body 4, so that the hawser 8 on two the first tension winch 5 can stretch to the side of dam body 4 as shown in Figure 1.When suspension dam uses, the hawser of two the first tension winch 5 and second tension winch 15 is fixed by respective anchor and riverbed, wherein the hawser 8 of two the first tension winch 5 to slip the angle of gesture for controlling dam body 4 relative to great river, so that accurately the angle of slipping is chosen in adjustment, dam body 4 is for choosing the hawser of second tension winch 15 of the one end slipped for keeping the flood in check to the dominating impact of dam body 4, suspension dam can be remained substantially stationary in flood, thus, play and effectively choose the effect of slipping.Front and back are each installs two hangers 1, each installation in a left and right on-hook 2 on hanger 1.Four on-hooks 2 drive dam body 4 advance or retreat jointly, can guarantee that dam body 4 navigates by water in flood more stable, in addition, four on-hooks 2 dam body 4 can be made to realize original place is arbitrarily angled turns to, be adapted at dexterous actions in a varied topography, narrow and small river course, slip position to adjust best choosing at any time.The first tension winch 5, second tension winch 15, hoist engine 27 and suction pump 7 that generating set 6 can be on dam body 4 provide electric energy.
The predominant use on described suspension dam is: one, between flood period, if when there is oblique river, Yokogawa as shown in figure 11, utilizes adjustment river, portable suspension dam to slip gesture, makes it be adjusted in normal riverbed; Two, as shown in Figure 10, when the Yellow River flood peak period occurs along dike flood passage, in Ha Noi slips greatly, install portable suspension dam with two ships, gesture of slipping is chosen, and to alleviate flood washing away dyke, can alleviate pressure of flood, to provide safeguard with Seawall safety for speedily carrying out rescue work; Three, as shown in figure 12, when dangerous section's dangerous situation occurs the Yellow River flood peak period, in Ha Noi slips greatly, install suspension dam with two ships, gesture of slipping is chosen, and to alleviate flood washing away dangerous section, alleviates difficulty of speedily carrying out rescue work.
As shown in Figure 1, on described dam body 4, installation two is positioned at the side of dam body 4 to the second directive wheel 14, second directive wheel 14.Hawser 8 one_to_one corresponding on second directive wheel 14 and the first tension winch 5, guarantees that two hawsers 8 are positioned at the certain distance of partial separation on dam body 4, thus, guarantee that two hawsers 8 can not cross winding mutually.The two ends of dam body 4 also can install two to the first directive wheel 3, first directive wheel 3 and the second tension winch 15 one_to_one corresponding.First directive wheel 3 guarantees hawser and hawser 8 cross winding of the second tension winch 15.
As shown in Figure 1, described dam body 4 installs suction pump 7.Suction pump 7 can, to water filling in inner chamber 26, make dam body 4 absorb water darker, thus, make to choose slide carriage 13 and can play more effective guiding function to upper strata current.After choosing and having sneaked away during work hours, suction pump 7 can, to extracardiac pumping in inner chamber 26, facilitate dam body 4 to navigate by water so that dam body 4 floats.
As shown in Figure 4 and Figure 5, dividing plate 28 is horizontally disposed with in described inner chamber 26.Inner chamber 26 is divided into epicoele and cavity of resorption by dividing plate 28.The upper end of guard tube 9 communicates with epicoele, even if to guarantee that river injects inner chamber 26 by guard tube 9, also possess certain water proof space, prevent dam body 4 from sinking in inner chamber 26.Suction pump 7 can communicate with the cavity of resorption of inner chamber 26, so as to realize in inner chamber 26 water filling or by inner chamber 26 to extracardiac pumping, thus, adjust the draft of dam body 4 as required at any time.
As shown in Figure 4 and Figure 5, described in choose slide carriage 13 and can be arc, to match with the sidewall of dam body 4, when guaranteeing that dam body 4 navigates by water in Ha Noi, resistance is minimum.
As shown in Figure 7, be provided with pulley 40 in described guard tube 9, during to prevent relative sliding between steel cable 12 and guard tube 9, transition rubs, and effectively can extend the application life of steel cable 12, meanwhile, alleviate the load of hoist engine 27.
Because the closure state choosing the relative dam body 4 of slide carriage 13 is normality, therefore, for making hoist engine 27 be in zero load under normal conditions, thus, extend the application life of hoist engine 27.The following locking mechanism choosing slide carriage 13 of design: as shown in Figure 7 and Figure 8, installation shaft 32 on the sidewall of described guard tube 9.One end of axle 32 is positioned at inner chamber 26 and installs long connecting rod 35.Long connecting rod 35 is installed ball float 36.The other end of axle 32 is positioned at guard tube 9 and installs short connecting rod 34.Short connecting rod 34 is installed live-rollers 31.The length of long connecting rod 35 is the twice of short connecting rod 34 length, so that ball float 36 effectively can control the position of live-rollers 31 under gravity and buoyancy.As shown in Figure 8, the free end choosing slide carriage 13 is provided with hook 29, and hook 29 coordinates with live-rollers 31, and the opening part of hook 29 is respectively equipped with crankle portion 30 and inclined-plane 33.Choose slide carriage 13 when being hung by live-rollers 31, live-rollers 31 and crankle portion 30 closely cooperate, and keep at a certain distance away between live-rollers 31 and inclined-plane 33.Crankle portion 30 tilts to opening direction, and the inner on inclined-plane 33 is higher than its outer end.Under usual state, long connecting rod 35 is horizontal level, and ball float 36 contacts with bottom dam body 4, and now, short connecting rod 34 is 45 degree with the folder α of vertical direction as shown in Figure 8.Due to choose slide carriage 13 apply power straight down by hook 29 pairs of live-rollers 31 time, as shown in Figure 8, crankle portion 30 meeting applies component left to live-rollers 31, live-rollers 31 is to then swing to the right to lower swing, therefore, live-rollers 31 cannot to lower swing under the pulling force of hook 29, thus, live-rollers 31 can hang locking by choosing slide carriage 13, to remove the burden of hoist engine 27.When launching choosing slide carriage 13, by suction pump 7 to water filling in inner chamber 26.Ball float 36 can drive long connecting rod 35 upwards to rotate under buoyancy of water effect, thus, long connecting rod 35 drives short connecting rod 34 to rotate as shown in Figure 8 by axle 32, because live-rollers 31 can rotate relative to crankle portion 30, and, crankle portion 30 and inclined-plane 33 shape are all coincide with the track of live-rollers 31 to lower swing, and therefore, live-rollers 31 can shift out by hook 29 easily under the drive of short connecting rod 34.In addition, during for guaranteeing that choosing slide carriage 13 launches, live-rollers 31 can shift out by hook 29, remove the locking of choosing slide carriage 13, also can start hoist engine 27, tighten up steel cable 12 by hoist engine 27, steel cable 12 will be chosen slide carriage 13 by movable pulley 11 and upwards mention, make live-rollers 31 be separated with crankle portion 30 and contact with inclined-plane 33, now, live-rollers 31 just can unresistedly in the least shift out by hook 29 by short connecting rod 34.
If choose between slide carriage 13 and dam body 4 and hang with the foreign material such as weeds, then the closed of slide carriage 13 is chosen in impact, for this reason, after choosing at every turn and having slipped, usually upwards can overturn choosing slide carriage 13 and leaves the water.But have a sizable part to be positioned under water owing to choosing slide carriage 13, therefore, mention when choosing slide carriage 13, the resistance of water can be very large.For solving the problem, as shown in Figure 5 and Figure 6, described in choose on slide carriage 13 and offer outfall 38, choose inside slide carriage 13 and install baffle plate 37, baffle plate 37 blocks outfall 38 completely, and baffle plate 37 upper end is with to choose slide carriage 13 hinged.When upwards mention choose slide carriage 13 time, baffle plate 37 can be opened under the flow action flowing through outfall 38, thus, significantly reduce choose the resistance that slide carriage 13 is carried.And choosing under the state of slipping, install baffle plate 37 owing to choosing inside slide carriage 13, baffle plate 37 blocks outfall 38 completely, and therefore, baffle plate 37 can prevent outfall 38 from crossing water, thus, guarantee to choose choosing of slide carriage 13 and slip effect.
Technical solutions according to the invention are not restricted in the scope of embodiment of the present invention.The technology contents of the not detailed description of the present invention is known technology.

Claims (8)

1. flood control multipurpose suspension dam, it is characterized in that: comprise dam body (4), dam body (4) is installed generating set (6), inner chamber (26) is provided with in dam body (4), the bottom of inner chamber (26) is vertically provided with guard tube (9), the lower end of guard tube (9) is connected with dam body (4) and communicates with the external world, and the upper end of guard tube (9) communicates with inner chamber (26); The side of dam body (4) is installed and is chosen slide carriage (13), and upper edge and the dam body (4) of choosing slide carriage (13) are hinged, and movable pulley (11) is installed in the lower edge of choosing slide carriage (13); Hoist engine (27) is installed in one end of inner chamber (26), two fixed pulleys (10) are installed in the top of guard tube (9), the steel cable (12) of hoist engine (27) is connected with dam body (4) afterwards around a fixed pulley (10), movable pulley (11), another fixed pulley (10) successively, and steel cable (12) part be positioned between fixed pulley (10) and movable pulley (11) is positioned at guard tube (9); The upper surface of dam body (4) is positioned at end positions and is respectively provided with second tension winch (15), be positioned between two the second tension winch (15) and two the first tension winch (5) are installed, the hawser of each first tension winch (5) and the second tension winch (15) is provided with anchor, the rotor shaft direction of the first tension winch (5) or conllinear parallel with the long axis direction of dam body (4), two hangers (1) are respectively installed in the front and back of dam body (4), and the upper left and right of hanger (1) is each installs an on-hook (2).
2. flood control multipurpose suspension dam according to claim 1, is characterized in that: described dam body (4) is installed suction pump (7), to inner chamber (26) interior water filling or interior to extracardiac pumping by inner chamber (26).
3. flood control multipurpose suspension dam according to claim 1, it is characterized in that: be horizontally disposed with dividing plate (28) in described inner chamber (26), inner chamber (26) is divided into epicoele and cavity of resorption by dividing plate (28); The upper end of guard tube (9) communicates with epicoele.
4. flood control multipurpose suspension dam according to claim 1, is characterized in that: described in choose slide carriage (13) be arc, to match with the sidewall of dam body (4).
5. flood control multipurpose suspension dam according to claim 1, is characterized in that: be provided with pulley (40) in described guard tube (9), rubs to prevent transition between steel cable (12) and guard tube (9).
6. flood control multipurpose suspension dam according to claim 1, it is characterized in that: installation shaft (32) on the sidewall of described guard tube (9), one end of axle (32) is positioned at inner chamber (26) and installs long connecting rod (35), long connecting rod (35) is installed ball float (36), the other end of axle (32) is positioned at guard tube (9) and installs short connecting rod (34), short connecting rod (34) is installed live-rollers (31), the free end choosing slide carriage (13) is provided with hook (29), hook (29) coordinates with live-rollers (31), the opening part of hook (29) is respectively equipped with crankle portion (30) and inclined-plane (33), crankle portion (30) tilts to opening direction, the inner on inclined-plane (33) is higher than its outer end.
7. flood control multipurpose suspension dam according to claim 1, it is characterized in that: described in choose on slide carriage (13) and offer outfall (38), choose slide carriage (13) inner side and baffle plate (37) is installed, baffle plate (37) blocks outfall (38) completely, and baffle plate (37) upper end is with to choose slide carriage (13) hinged.
8. flood control multipurpose suspension dam according to claim 1, it is characterized in that: the upper installation two of described dam body (4) is to the second directive wheel (14), second directive wheel (14) is positioned at the side of dam body (4), the second directive wheel (14) and hawser (8) one_to_one corresponding on the first tension winch (5).
CN201410048207.6A 2014-02-12 2014-02-12 Flood control multipurpose suspension dam Expired - Fee Related CN103741650B (en)

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Application Number Priority Date Filing Date Title
CN201410048207.6A CN103741650B (en) 2014-02-12 2014-02-12 Flood control multipurpose suspension dam

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CN103741650B true CN103741650B (en) 2015-09-02

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Publication number Priority date Publication date Assignee Title
FR3082534B1 (en) * 2018-06-15 2020-07-17 Hydroplus FLOOD CONTROL FACILITY

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243416A1 (en) * 1992-12-17 1994-06-23 Gerhard Ludwig Combined float and sheet metal deflector for flowing water power generation system
CN2425850Y (en) * 2000-05-01 2001-04-04 梁兆轩 Flating ship for blocking breach in fighting flood
CN203768879U (en) * 2014-02-12 2014-08-13 黄河水利委员会山东黄河河务局 Multipurpose suspension dam for flood prevention emergency

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Inventor after: Li Zundong

Inventor after: Su Linlin

Inventor after: Xu Yutang

Inventor after: Liu Haiquan

Inventor after: Chen Bin

Inventor after: Han Wenfeng

Inventor after: Meng Xiangwen

Inventor after: Cao Honghai

Inventor after: Yuan Bin

Inventor after: Jia Hai

Inventor after: Wang Weijian

Inventor after: Wang Ning

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