929results about "Stream regulation" patented technology

The invention provides a control node locating protecting method of undercutting channel segment water level lowering amplitude. The method comprises the steps that a lateral erosion zone and a deep erosion zone are divided; a target channel section is subjected to meshing, a plane two-dimension water flow mathematic model is established, parameter calibration and verification are carried out; a protection project is generalized to the plane two-dimension water flow mathematic model, the arranging zone and the width of the protecting project are determined; local gradient amplification and upstream water level amplification corresponding to each working condition are obtained, mesh sequences are analyzed respectively; key nodes or other nodes which have obvious influence are selected, for lateral erosion nodes, a hidden closure dam and a beach protection part are arranged on a river branch or a bottomland, and for deep erosion nodes, a bottom protecting band or a hidden closure dam are placed in a main groove. According to the method, nodes are divided into the lateral erosion nodes and the deep erosion nodes, protection part difference of the nodes in different types is provided, by comparing the efficiency of a local channel segment arranging protecting project, the positions of the nodes are accurately located, and the optimum efficiency of the protecting project is guaranteed powerfully.

The invention relates to the technical field of underwater leveling machines, in particular to a transverse and longitudinal walking mechanism, a multi-degree-of-freedom adjusting underwater leveling machine and a construction method. The transverse and longitudinal walking mechanism comprises an end part structure, and a first hole is formed in the end part structure in a penetrating manner; a first hole is formed in the end structure in a penetrating manner; at least part of the transverse moving frame is located in the first hole, and the transverse moving frame is in sliding fit with the end structure in the radial direction of the first hole; the walking longitudinal beam penetrates through the transverse moving frame in the length direction of the first hole and is in sliding fit with the transverse moving frame. The first vertical lifting supporting leg is connected with the end part structure; and the second vertical lifting support leg is connected with the walking longitudinal beam. According to the transverse and longitudinal walking-pedrail walking mechanism, the mode that the walking-pedrail longitudinal beam is sleeved with the transverse moving frame, the transverse moving frame is sleeved with the end structure, the transverse moving frame is used for replacing a transition frame of an existing walking-pedrail type leveling machine, and therefore the overall weight of the transverse and longitudinal walking-pedrail walking mechanism is effectively reduced.

The utility model discloses a bridge pile foundation protection device which comprises a protection pile foundation clamping plate, a buffering protection plate, a flow guide plate, a flow guide plate driving structure, an anti-collision buffering assembly and an anti-collision buffering balance assembly. The protective pile foundation clamping plate is detachably arranged on the side wall of a pile foundation and fixed to the pile foundation through a fastening assembly. Buffering protection plates are circumferentially distributed on the outer sides of the protection pile foundation clamping plates and used for bearing impact force of foreign objects. An anti-collision buffering assembly is arranged between the buffering protection plate and the protection pile foundation clamping plate and used for buffering and absorbing force generated when foreign matters collide with the buffering protection plate. An anti-collision buffering balance assembly is arranged on the periphery of the anti-collision buffering assembly and used for balancing the buffering protection plate; and a flow guide plate is movably arranged on the buffer protection plate, is unfolded under the action of a flow guide plate driving structure and is used for guiding and dividing flood flow. The river-crossing bridge pile foundation structure solves the problem that a river-crossing bridge pile foundation can be damaged under the impact effect of flood flow.

A method for reducing the danger of a dammed lake formed by a debris flow blocking a river, comprising: first predicting the accumulation range of a river-blocking debris dam during occurrence of a debris flow, dividing a river boundary into multiple areas on the basis of the elevation, and then performing roughness reduction treatment on the areas of the river boundary during a dry season. The present method reduces the roughness of a river boundary within the accumulation range of a river-blocking debris dam, so as to reduce the opposite bank dam height of the river-blocking debris dam and the storage capacity of the dammed lake, thereby achieving the purpose of reducing the danger of dammed lakes formed by debris flows and reducing the impact of debris flow disasters.

An erosion coast ecological protection system comprises: ecological submerged dikes, tidal flat habitats, vegetation habitats and ecological breeding areas arranged in sequence from sea to land on the erosion coast; the ecological submerged dikes are arranged in the subtidal zone parallel to the coast, the overall structure is composed of multiple sections of submerged dikes and gates, and the length of a single section of submerged dikes is not less than 8 times the wavelength; the tidal flat habitat is connected with the ecological submerged dike and is properly decorated according to the tidal flat terrain to form a multiple habitat consisting of shallow water areas and deep water areas; the vegetation habitat area is located in the intertidal zone, and its outer edge is arranged with riprap to avoid tidal channels, the slope is about 1:2-1:3, and a vegetation belt of not less than 50m wide is planted on the land side; the ecological breeding area is provided with a plurality of breeding ponds with field-shaped channels, the top width of the channel is about 4-6m, and several rows of tamarisks are planted to form a wind-resistant buffer zone.

The invention provides a nuclear power station flow channel joint dredging robot applying an image recognition algorithm. The robot comprises an image recognition sensing system, a robot moving navigation system, a dredging operation system and a safety monitoring system. The image recognition sensing system is used for collecting an image in the flow channel through a high-resolution camera and analyzing and recognizing sludge and sundries in the flow channel according to the image; the robot mobile navigation system is used for realizing positioning, path planning and autonomous movement of the robot; the desilting operation system is used for removing and collecting sludge and sundries in the flow channel; the safety monitoring system is used for monitoring the running state and the working environment of the robot in real time and ensuring the safety and the reliability of the dredging process of the robot; by integrating image recognition, automatic navigation and a safety monitoring system, efficient, accurate and safe flow channel dredging operation is achieved.

The invention relates to the technical field of seabed sand excavation pit repair, and discloses a seabed sand excavation pit repair control method and system based on marine dredged mud. The method comprises the steps that surveying and mapping and environment analysis are conducted on a seabed sand excavation pit, three-dimensional topographic data are obtained, and dredged mud is improved; formulating a filling scheme based on data analysis, and establishing a barge and pipeline combined transportation system; filling materials layer by layer, and tamping and grouting; a three-layer protection structure is constructed, and a gabion mesh cage and an energy dissipation device are additionally arranged in a high-risk area; and the restoration effect is evaluated by monitoring the network to form an evaluation database. According to the method, marine dredged mud is used as a main material, and efficient and stable repairing of the seabed sand excavation pit is achieved through scientific improvement treatment and layered filling technologies in combination with multi-layer protection measures and a perfect monitoring and evaluating system.

The invention belongs to the field of lake ecological desilting, and discloses a shallow lake bottom mud ecological desilting and residual water treatment combined treatment method which comprises lake bottom mud ecological desilting, solidification dehydration treatment and residual water treatment. Ecological dredging of the lake bottom mud is implemented by adopting an environment-friendly cutter suction dredger and a sealed pipeline to convey mud, and the bottom mud is conveyed to a mud discharge field to be solidified and dehydrated. A vacuum preloading technology is adopted for solidification and dehydration of the bottom mud, pore water of the bottom mud is effectively discharged by increasing the pressure difference between soil bodies of a drainage plate, and the overall solidification effect is improved. The residual water treatment comprises the treatment of desilting and solidifying residual water, the technologies of multi-stage precipitation, mechanical aeration, aquatic plant remediation and the like are adopted, and the residual water is discharged nearby after being treated to reach the standard. The combined treatment method aims at effectively reducing endogenous pollution of lakes, promoting lake water quality improvement and guaranteeing water safety of regional lakes and reservoirs, and is particularly suitable for ecological dredging engineering of shallow lakes, short construction period and fine-particle bottom mud.

An intelligent dredging system for a high-piled wharf and a control method thereof are provided, and the system includes an intelligent monitoring-decision control subsystem and a decentralized high-pressure water disturbance subsystem. The intelligent monitoring-decision control subsystem is composed of a high-precision pile-foundation sediment siltation warning device, a tidal monitoring device and a control terminal. The decentralized high-pressure water disturbance subsystem is composed of a water spraying device, a cable and a multi-loop power distribution device.

A method and system for determining a limit scouring state of riverbed in downstream river channel of a reservoir group are provided. The method includes: collecting discharge data and cross-sectional prototype observation data of the downstream river channel of the reservoir group; establishing a correlation between discharge and a sediment carrying capacity indicator of a cross-section of a controlled hydrological station; calculating variation of the sediment carrying capacity indicator corresponding to dominant discharge; and determining and verifying the limit scouring state of the riverbed in the downstream river channel of the reservoir group. The method determines the limit scouring state of the riverbed in the river channel, and verifies the preliminary screening results based on the cross-section changes with the above determination, so as to provide technical support for mastering the development process of riverbed scouring and scouring trend prediction in the dam downstream river channel of the reservoir group.

The invention relates to the technical field of underwater dredging construction. The underwater dredging construction method comprises the steps that environment information of a to-be-constructed area is obtained, the environment information is input into a sludge physical property model, sludge physical property information is obtained, the sludge physical property information is compared with a preset sludge standard value, a comparison result is obtained, and the sludge type is determined based on the comparison result. And selecting a sludge construction mode corresponding to the sludge category based on the sludge category, adjusting working parameters of the construction equipment according to the sludge construction mode, and after the working parameters are adjusted, executing dredging construction until the dredging task of the to-be-constructed area is completed. The method has the effects of improving the construction efficiency and reducing equipment damage.

The invention discloses a riverway dredging method which comprises the following steps: dynamically scanning a riverway along a spiral propulsion path, and obtaining riverbed topographic data and sediment thickness in real time; a three-dimensional riverbed model is established based on the riverbed topographic data, and a core dredging area, a transition maintenance area and an ecological reserve area are divided in the three-dimensional riverbed model according to the sediment thickness; the core dredging area is divided into a surface layer, a middle layer and a bottom layer in the vertical direction, and a differentiated dredging process is executed; carrying out mud-water separation treatment on the dredged material, purifying the separated water, and reinjecting the purified water into the river channel; prefabricated ecological concrete modules are laid on the surface of a dredged riverbed, diversion trenches and biological nests are formed, and the biological nests are filled with polylactic acid / straw composite fiber felts containing local submerged plant seeds. Through spiral scanning, three-dimensional modeling and intelligent partitioning, integration of monitoring, planning, construction and repairing is achieved, accurate dredging is implemented, and the dredging efficiency is improved.

The invention relates to the technical field of coastal zone renovation and repair, in particular to a siltation promotion device for coastal zone renovation and repair, which comprises a siltation promotion assembly and a caisson which are sequentially arranged from top to bottom, the siltation promotion assembly comprises a plurality of siltation promotion modules which are connected through side edges, and the top side of the siltation promotion assembly is used for being fixedly connected with a coast; each siltation promotion module comprises a frame and a plurality of anti-flow plates, the multiple anti-flow plates are sequentially arranged in the frame from top to bottom, the two ends of each anti-flow plate are rotationally connected with the two opposite sides of the frame correspondingly, and every two adjacent siltation promotion modules are rotationally connected through one side edge of the frame; a sedimentation cavity is formed in the top of the caisson, a permeable material is arranged in the sedimentation cavity, flow guide holes penetrating through the two sides are formed in the upstream face and the downstream face of the caisson correspondingly, and the bottom side of the siltation promotion module is connected with the caisson and located above the sedimentation cavity; the siltation promotion device is formed in a splicing mode, the siltation promotion device can be well suitable for complex terrains, and the anti-flow plate is arranged to effectively resist water flow impact.

The invention discloses an anti-scouring device for an offshore wind power foundation, and belongs to the technical field of fan foundation auxiliary structures. Comprising a generator, a supporting rod is fixedly connected to the bottom of the generator, a flow guide plate is arranged on the surface of the supporting rod, curved plates are fixedly connected to the top and the bottom of the flow guide plate correspondingly, sealing rings are fixedly arranged at the joints of the curved plates and the supporting rod, and the sealing rings are slidably connected with the supporting rod; a rotating mechanism is arranged on the inner side of the flow guide plate, a supporting mechanism and a sliding mechanism are arranged on the surface of the supporting rod, a floating body mechanism is arranged at the hollow position of the inner side of the flow guide plate, and a wave detection mechanism is arranged on the wave impact face of the flow guide plate. Compared with an existing method, the device can rotate efficiently, seawater can be decomposed conveniently, and the impact resistance is improved.

The utility model relates to the technical field of milling and digging heads, and discloses a stemless milling and digging head for a milling and digging machine, which comprises a milling and digging machine body, the right side of the milling and digging machine body is fixedly connected with a connecting assembly, the inside of the connecting assembly is in threaded connection with a screw rod, one end of the screw rod is fixedly connected with a rotating block, and the other end of the screw rod is fixedly connected with a nut. A fixed block is fixedly connected to the other end of the screw rod, a movable plate is fixedly connected to the side, close to each other, of the fixed block, limiting blocks are fixedly connected to the two sides of the movable plate, an inserting rod is fixedly connected to the side, close to each other, of the movable plate, and the inserting rod is slidably connected to the interior of the connecting block and the interior of the connecting frame; and the right side of the connecting frame is fixedly connected with a connecting plate. According to the utility model, the milling and digging head can be conveniently disassembled, the convenience during maintenance can be improved, the digging head can be adjusted according to requirements, the development requirements of different sizes are met, and the flexibility and adaptability of construction are improved.

The invention provides a hydraulic automatic fishway device, and relates to the technical field of hydraulic engineering, the hydraulic automatic fishway device comprises an arc fishway track, a multifunctional structure is rotatably mounted on the outer side of the arc fishway track, the multifunctional structure comprises a synchronous belt, a plurality of fish collecting plates are arranged on the surface of the synchronous belt, and each fish collecting plate is clamped with the synchronous belt; a fish collecting groove is formed in each fish collecting plate, a fish luring warm-color lamp strip is arranged in each fish collecting groove, through a multifunctional structure, when water flow impacts the water turbine from bottom to top, the water turbine rotates under the radial force of the water flow, so that radial force is generated on the fixing rod to rotate in the fixing frame, and meanwhile, the water flow impacts the water turbine through the water flow; the rotation of the fixing rod enables the driving bevel gear to rotate and to be engaged with the driven bevel gear, so that the driven bevel gear rotates, and then the rotating cross rod is controlled to drive the first gear to rotate and to be engaged with the inner tooth set, so that the synchronous belt can drive the fish collecting plate and the fish collecting groove to rotate, fish at the fishway inlet is brought to the upstream, and migration of the fish is helped.

The present invention provides a device for regulating the water temperature discharged from a reservoir. The device for regulating the water temperature discharged from the reservoir includes a power station intake tower, a cable-stayed tower, a support platform and a water retaining system. The cable-stayed towers are respectively arranged on both sides of the water inlet of the power station intake tower. The support platform is a horizontal circular arch, and both ends of the support platform are connected to the cable-stayed towers. The water retaining system is connected to the circular-arch-shaped support platform and extends downward to the lower part of the reservoir. The water retaining system includes columns, collar rings, a water retaining curtain and a hoist. A plurality of collar rings are sleeved on the columns. The water retaining curtain is connected to the support platform and the plurality of collar rings. The hoist is connected to the upper collar ring. By arranging the cable-stayed towers on both sides of the water inlet of the power station intake tower, the present invention realizes the technical solution of implementing the water retaining system on a single-side bank slope, without blocking the main river channel, and the flood discharge condition does not need to bear the flood load.

The invention discloses a reservoir desilting method and device using fixed jet flow, and relates to the technical field of water conservancy and hydropower engineering desilting. According to the method, the flow speed, pressure, mud layer thickness and gradient parameters of water around a nozzle are collected in real time; calculating a jet flow angle compensation coefficient, and identifying a nozzle direction stable state; on the basis of a nozzle set with stable direction, a nozzle group is constructed and a time sequence differential control table is established by combining a topological relation between nodes and disturbance propagation characteristics, so that ordered migration of turbulent flow disturbance is realized; sediment concentration, flow velocity and flow data are collected in a flow guide plate and a sediment discharge port area, and a desilting efficiency index is calculated and used for evaluating sediment transportation continuity and flow guide performance; and a comprehensive operation optimization coefficient is generated through a multivariable adaptive weighted fusion algorithm, and the system automatically executes adaptive regulation or sends out a manual intervention prompt. According to the method, self-monitoring, self-correction and global optimization of the fixed jet system can be achieved, and the reservoir dredging efficiency and the operation stability are remarkably improved.

The invention discloses an integrated water dredging device and a dredging method, and belongs to the technical field of water treatment. Comprising an environment-friendly cutter suction dredger, the silt discharging end of the environment-friendly cutter suction dredger is provided with a first pumping system, the first pumping system is communicated with an impurity removal adjusting platform, and the impurity removal adjusting platform comprises a double-layer rotary screen and a first adjusting pool; the impurity removal adjusting platform is further communicated with a dewatering and volume reduction platform through a second pumping system, and a water outlet of the dewatering and volume reduction platform is communicated with a tail water treatment platform; the environment-friendly cutter suction dredger comprises a dredger body and a dredging device arranged on the dredger body. Sludge is preliminarily filtered through the dredging device, and later sludge treatment is better facilitated.

The invention provides a hydropower station ecological flow discharge control method and device, and the method comprises the steps: determining a to-be-analyzed riverway corresponding to a target hydropower station, and determining the riverway elevation and target riverway creatures corresponding to the to-be-analyzed riverway; a hydrodynamic model corresponding to the to-be-analyzed river channel is established according to the river channel elevation, biological environment elements corresponding to the target river channel organisms are obtained, and the biological environment elements comprise the flow velocity, the water depth, the water temperature and dissolved oxygen; according to the hydrodynamic model, the at least one reference discharge control parameter and the biological environment elements, calculating a biological inhabitation river area value corresponding to each reference discharge control parameter; and determining a target discharge control parameter according to the biological inhabitation river area value corresponding to each reference discharge control parameter, and controlling the ecological flow discharge of the target hydropower station based on the target discharge control parameter. By means of the method, water resources can be fully utilized, the ecological environment in the riverway can be protected, and aquatic organisms in the riverway can be effectively protected.

The invention discloses a reservoir desilting body layout scheme evaluation method based on siltation risk characteristics, belongs to the technical field of reservoir desilting, and can solve the problem that an existing method is low in evaluation precision and accuracy. The method comprises the following steps: S1, determining a plurality of subareas of a reservoir according to historical operation data of the reservoir, and determining sedimentation risk characteristics and sediment distribution characteristics of each subarea in each of a plurality of continuous time periods; s2, according to the siltation risk characteristics and the sediment distribution characteristics, constructing a sediment distribution prediction model of the reservoir; and S3, utilizing the sediment distribution prediction model to predict the sediment distribution situation after the reservoir implements the desilting body layout scheme, and evaluating the desilting body layout scheme according to the sediment distribution situation. The method is used for evaluating the reservoir desilting body layout scheme.

The invention relates to the field of riverway ecological protection, in particular to vegetation restoration equipment for riverway ecological protection and a restoration method. A drainage shell is movably arranged on the side, away from the river bank, of the fixing plate in the vertical direction and located at the front end of the floating plate, a first opening is formed in the end, in the length direction, of the drainage shell, water flow of the river flows into the drainage shell from the first opening, and an adsorption groove is formed in the side wall, away from the fixing plate, of the drainage shell in a penetrating mode. A net cage is arranged in the drainage shell, is located in the drainage shell and is located on one side of the adsorption tank, the drainage shell is divided into a first drainage channel and a second drainage channel by the net cage, water flowing into the drainage shell from a first opening of the drainage shell enters the first drainage channel, and water flowing into the drainage shell from the adsorption tank enters the second drainage channel; a lifting box is arranged in the net cage in the vertical direction in a reciprocating mode, and a second opening is formed in the upper portion of the lifting box. The garbage intercepting device improves the garbage intercepting effect.

The invention relates to the technical field of water conservancy projects, in particular to a large pump station system which comprises a gate area, a sedimentation tank, a filter station, a transition area and a pump station runner area which are sequentially arranged in the water flow direction, an anti-floating bottom plate extends outwards from the edge of a wall of the large pump station system, and the gate area is provided with at least two main gates and at least one auxiliary gate; a plurality of first energy dissipation piers are arranged in the sedimentation tank; coarse screens and fine screens are arranged between the adjacent filter station guide walls in the filter station and between the filter station guide walls and the outer wall of the filter station; the transition area is in a horn mouth shape in the water inflow direction, and a plurality of second energy dissipation piers are arranged in the transition area. Water suction heads of water taking pumps are arranged between the adjacent water distribution walls in the pump station flow channel area and between the water distribution walls and the outer wall of the pump station flow channel area. According to the large pump station system, the anti-floating stability is improved through the anti-floating bottom plate, the water flow energy is gradually reduced through the partition design, and the problem that the pump station system is prone to being unstable due to the fact that a large amount of seawater flows into the pump station is effectively solved.

The utility model discloses an unmanned intelligent environmental protection monitoring device, which relates to the technical field of monitoring devices, and particularly comprises a water blocking gate, a water storage tank and a water storage tank, the gathering plate is mounted at the front end of the water blocking gate and used for gathering garbage floating on the water surface; the salvage part is mounted on the water blocking gate and used for salvaging garbage floating on the water surface, and one end of the salvage part extends to the position below the gathering plate; the collecting frame is installed on the back face of the water blocking gate and used for collecting the floating garbage fished by the fishing component; and the driving component is used for driving the fishing component to circularly move along the fishing path. The unmanned intelligent environmental protection monitoring device can drive a water quality monitor to ascend and descend along with ascending and descending of the water surface height so as to adapt to monitoring of different water surface environments, a first gear of a driving motor working belt rotates to drive a second gear to work through a chain, and therefore a fishing net is driven to move; and the salvage net is matched with the salvage plate to convey the horizontally floating garbage into the collection frame for collection.

An intelligent dredging system for a high-piled wharf and a control method thereof are provided, and the system includes an intelligent monitoring-decision control subsystem and a decentralized high-pressure water disturbance subsystem. The intelligent monitoring-decision control subsystem is composed of a high-precision pile-foundation sediment siltation warning device, a tidal monitoring device and a control terminal. The decentralized high-pressure water disturbance subsystem is composed of a water spraying device, a cable and a multi-loop power distribution device.

The invention discloses a plane and vertical combination-based Tesla valve tidal river network hydrodynamic reconstruction method, which comprises the following steps of: 1, designing a main seawater upstream channel in a tidal river network into a Tesla valve structural form on the form of a river plane; secondly, in the vertical direction of the river channel, a Tesla valve-like structure is adopted, and a directional flow guide structure is arranged at the position close to a riverbed, so that when the water flow flows towards the ocean, the flow line is smooth, and when the water flow traces upwards from the ocean to the river channel, the water flow resistance is increased; structures similar to Tesla valves are installed at the inflow and upstream positions between the ocean and the river channel, movable assemblies such as gates are not used, salty tide upstream is effectively inhibited, meanwhile, water connectivity is not blocked, the influence on fish migration and ecosystem connectivity is small, and the method is suitable for large-scale popularization and application. High-concentration salt-containing water at the bottom is more effectively blocked, and one-way flow of water and pollutant discharge in a riverway of a tidal river network area are promoted.

The invention discloses a combined cofferdam in the technical field of hydraulic engineering construction. The combined cofferdam comprises an upstream steel film end sealing cofferdam located on the upstream of a river channel and a downstream steel film end sealing cofferdam located on the downstream of the river channel. The diversion channel comprises a base formed by compaction treatment of original soil and local stones, double-row piles located on the side portion of the base, bamboo plywood laid on the surface layer of the double-row piles and the surface layer of the base and impermeable membrane cloth. A stilling pool is arranged in a downstream outlet area of the diversion channel; the ton bags are arranged at the bottom folding points and lap joints of the bamboo plywood and the impermeable membrane cloth and the downstream sides of the upstream steel membrane end sealing cofferdam and the downstream steel membrane end sealing cofferdam; through a brand new structural design, a combined cofferdam structural form is constructed, so that the safety and stability of the combined cofferdam under the conditions of large flow velocity and flow, large upstream and downstream height difference, special ground conditions and unfavorable geological conditions are remarkably improved.

The invention discloses a device and method capable of achieving equivalent negative water depth and broadband water wave isolation. The device comprises a plurality of gear structural parts which are arranged at equal intervals in a matrix mode. The gear structural part is a cylinder and comprises a first end and a second end, and two fan-shaped arc grooves which are in axial symmetry along the symmetric line of the bottom face are formed in the first bottom face of the first end. When the device is arranged on the water surface, the central axis of the cylinder of the gear structural part is perpendicular to the horizontal plane, the first end is exposed on the water surface, the fan-shaped arc groove is immersed in the water to a preset depth value, the second end is immersed in the water, and the equivalent water depth he and the equivalent propagation wave number ke of the device are both negative. The device has the advantages of being small in occupied area, simple in structure, low in cost, large in working range, capable of being suitable for complex water area environments, capable of blocking water waves and not blocking water flow and the like. Therefore, it is very necessary to invent the device to help people to better utilize resources on the sea.

The utility model relates to the technical field of water conservancy project closure, in particular to a blocking device for water conservancy project closure. Comprising a frame body, a plurality of hanging rings are symmetrically arranged on the upper surface of the frame body, the top end of the frame body is open, drainage parts used for controlling water flow are symmetrically arranged in the frame body, and an inner blocking area is formed between the drainage parts on the two sides; the intercepting parts are used for forming an outer blocking area on the outer sides of the drainage parts and extruding stones in the inner blocking area, and the intercepting parts arranged on the inner sides of the drainage parts on the two sides communicate with water flow in the outer blocking area. The flow speed of water flow is controlled through the drainage plate, resistance borne by the drainage plate during closure can be reduced, the phenomenon that the frame inclines when the frame is placed is avoided, the frame is matched with the dam bodies on the two sides of the closure position, the water flow flows away from the interior of the frame, and therefore the two sides of the dam bodies are prevented from being washed away by the water flow, and the dam bodies are protected.