488 results about "Water diversion" patented technology

The invention discloses a multi-source heterogeneous anomaly detection method based on time correlation, and belongs to the technical field of water diversion engineering, and the method comprises the steps: S1, obtaining multi-source sensor time sequence data in multi-source heterogeneous data, carrying out the preprocessing of the multi-source sensor time sequence data, and dividing a training set and a test set; s2, constructing a double-branch depth feature extraction network model, training by adopting the training set, and testing through the test set to obtain a trained double-branch depth feature extraction network model; the double-branch depth feature extraction network model comprises a double-branch unit, an attention feature fusion unit, a classifier unit and an output layer unit which are connected in sequence; and S3, inputting to-be-detected data into the trained double-branch depth feature extraction network model, and finally outputting an anomaly diagnosis result. A double-branch depth feature extraction network is constructed, adaptive fusion is realized through an attention mechanism, and the problem of poor modal adaptability of heterogeneous data is solved.

The invention belongs to the technical field of ship management, and provides a combined intelligent ship water diversion system integrating differential positioning, a laser radar and a camera. In the shore end RTK-inertial navigation depth fusion positioning module, extended Kalman filtering fusion is carried out on data acquired by shipborne equipment, so that continuity of accurate positioning is realized; the construction of a color high-precision map is realized through a laser radar-monocular vision color high-precision modeling module, details such as wharf fender materials and signboard characters can be better distinguished, and the problem of shoreline modeling defects is solved; visualization of obstacles is achieved through the multi-scene dynamic obstacle detection and fusion module, meanwhile, through cooperation of multi-source data, the precision and stability of ship positioning are greatly improved, higher precision and reliability are achieved, and the precision of a guide instruction is improved; through cooperation of the 5G private network and the visualization module, the data transmission efficiency is improved, the timeliness is improved, and transmission delay can be avoided.

The invention provides an irrigation district water diversion quantity multistage distribution method under total quantity index constraint, comprising the following steps: dividing an irrigation district into a plurality of calculation units based on an administrative division boundary and a canal system network; respectively calculating the initial water demand of each calculation unit under the living water demand, the industrial water demand, the agricultural water demand and the ecological water demand; based on the initial water demand and according to multiple water resource rigid constraint indexes, performing at least one round of checking and pressure reduction on the initial water demand of each calculation unit to obtain an initial distribution water amount of each calculation unit; and carrying out secondary distribution on surplus water generated after checking and pressure reduction, and compensating the calculation units of which the water demand is not met to obtain the final distribution water of each calculation unit. According to the method, fair, reasonable and efficient distribution of water resources in a complex system with cross coupling of administrative division and canal system networks is realized, and the problems of conflict between a scheme and actual management requirements, water consumption contradiction and the like caused by a traditional single-dimension distribution method are avoided.

The invention relates to the technical field of pumped storage power station water diversion systems, and discloses a method and device for determining a pressure pipeline reinforcement ultra-high performance concrete lining structure. The method comprises the steps that internal pressure information, radius information and lining thickness information of a target water channel, the design tensile strength of a tensile steel bar, the tensile stress borne by ultra-high performance concrete and the lining section area per unit length are obtained; calculating circumferential stress information of the target water channel based on the internal pressure information and the radius information; based on the circumferential stress information and the lining thickness information, the tensile force resultant force of the lining section in unit length is determined; determining the total sectional area of the tensile steel bars based on the tensile resultant force of the section of the lining in unit length, the designed tensile strength of the tensile steel bars, the tensile stress of the ultra-high performance concrete and the section area of the lining in unit length; determining the number of to-be-assembled reinforcements based on the total sectional area of the tensile reinforcements; and the pressure pipeline reinforcement ultra-high performance concrete lining structure is determined based on the number of the to-be-assembled steel bars and a preset steel bar arrangement rule.

The invention discloses a tunnel high-pressure gushing water comprehensive treatment method integrating probing, guiding, blocking, discharging and fixing, and belongs to the technical field of tunnel construction. The method comprises the following steps: exploring and dividing geological subsections; drainage: drilling a water diversion hole in the concentrated water gushing channel, and pre-burying a multi-stage drainage pipe for graded pressure reduction; blocking is conducted, specifically, the channel is closed through a layered pressure backfill grouting technology; a permanent drainage system is laid, and a deep drainage pipe is connected; reinforcement is carried out, and radial consolidation grouting and groove jumping type inverted arch dismounting and replacing are carried out; and the whole process is monitored in real time, and construction is dynamically optimized. According to the method, exploration, drainage, plugging, drainage, reinforcement and dynamic regulation and control are organically combined, the problems that water plugging, pressure reduction and cooperation are difficult in high-pressure water-rich karst stratum tunnel gushing water treatment are solved, and the method has the advantages of being prominent in systematicness, thorough in treatment, remarkable in pertinence, safe, controllable, novel in process, reliable in quality, dynamic in regulation and control, high in adaptability, obvious in comprehensive benefit and the like.

A gate linkage control method and device and a series water supply and power generation system are provided. The method comprises the following steps of: acquiring a water demand and current water level information of the series water supply and power generation system, the current water level information at least comprising current riverway water level information and current water diversion trunk canal water level information; determining a gate opening degree control strategy of a first water diversion gate and a second water diversion gate according to the water demand and the current water level information of the series water supply and power generation system; and carrying out linkage control on the first water diversion gate and the second water diversion gate according to the gate opening degree control strategy.

The invention provides a water receiving lake water quality analysis method and system in a water diversion project combined with multi-source data fusion, and relates to the technical field of water resource management and analys.The method comprises the steps that firstly, field domain basic data are collected, and a water quality association field is constructed; performing interaction relationship modeling operation on the field domain units to obtain a field domain unit interaction model; performing dynamic coupling fusion processing on the field domain basic data based on the field domain unit interaction model to generate coupling water quality data; combining the water quality associated field domain change trend data with the coupled water quality data to deduce a water receiving lake water quality trend evolution path; and finally, identifying the core interaction unit and generating a water diversion project water quality dynamic regulation and control scheme in combination with the trend evolution path. The system can comprehensively analyze the water quality of the water-receiving lake, realizes accurate dynamic regulation and control, and ensures the stability of the water quality.

The invention relates to an intelligent ship water diversion method and system based on RTK and inertial navigation fusion, and the method comprises the steps: firstly, deploying and calibrating an RTK base station at a wharf commanding height, generating a differential correction in real time, and broadcasting the differential correction to a shipborne end; utilizing RTK surveying and mapping equipment to collect shoreline feature points, adopting a cubic spline interpolation algorithm to construct a continuous and smooth three-dimensional shoreline curve model, and fusing wharf geographic information to generate a shoreline visual map with geographic coordinates; establishing a ship coordinate system, converting inertial navigation attitude data into the coordinate system through a rotation matrix and a translation vector, fusing the inertial navigation attitude data with RTK position data, and outputting a high-precision ship pose; fusion data are transmitted through a 5G network, a shore end converts the fusion data into a local plane coordinate system and generates a real-time dynamic visual interface, the real-time dynamic visual interface is pushed to a tug terminal through an RTSP protocol, water diversion operation is assisted, high-precision perception, visual guidance and shore ship cooperation of the ship berthing process are achieved, and the water diversion safety and the intelligent level are improved.

The invention discloses a water diversion structure for water conservancy and hydropower engineering, and relates to the technical field of water conservancy and hydropower water diversion devices. The filtering device comprises a filtering net cylinder; the filtering device is connected with a scraping assembly; the scraping assembly is rotationally connected with a cleaning assembly; the bottom of the water diversion box is fixedly connected with a sealing assembly; the scraping assembly is in transmission connection with the discharging assembly through the transmission assembly. The filter screen cylinder is driven to rotate through the filter device, and the filter device synchronously drives the scraping assembly to scrape impurities; the scraping assembly drives the cleaning assembly to clean the filter screen cylinder; the scraped impurities are sealed and collected by the sealing assembly, and then the transmission assembly drives the discharging assembly to be discharged in a centralized mode. The problems that in the operation process of an existing water diversion device, when impurities are discharged, water leakage is likely to be caused, and conveying efficiency is lowered are solved.

The utility model provides a water diversion type cascade series hydropower station group. Each stage of hydropower station comprises a water inlet, a water diversion tunnel, a surge chamber, a branch pipe, a plant, a flow balance discharge hole, an energy dissipation facility, a tail water tunnel and a regulating reservoir. Wherein the water inlet of the first-stage hydropower station is communicated with a reservoir, and the last-stage hydropower station is connected with a downstream river channel; a flow balance discharge hole is arranged below a plant of each stage of hydropower station, the flow balance discharge hole is connected with the plant in parallel, the upstream of the flow balance discharge hole is separated from a diversion tunnel through a branch pipe, the downstream of the flow balance discharge hole is communicated with a regulating reservoir, the flow balance discharge hole is provided with a valve chamber, a discharge ball valve and a flow regulating valve are mounted in the valve chamber, and an energy dissipation facility is arranged at the downstream of the valve chamber. The water flow stably enters the adjusting tank. On the premise that work of other hydropower station units in the cascade is not affected, the flow can still be normally lowered into a downstream reservoir, and therefore it is guaranteed that power generation of upstream and downstream hydropower stations is not affected.

The invention provides a vertical shaft type water inlet and outlet gate system of a pumped storage power station, and belongs to the technical field of water conservancy safety control. Comprising a cylindrical gate, a closed shaft, a trash rack section, a diffusion section, a straight pipe section, a bent pipe section and a tunnel section which are sequentially arranged on the cylindrical gate vertical shaft type water inlet and outlet in the power generation water flow direction. One end of the trash rack section is a horn mouth section, the trash rack section is provided with a cover plate, a diversion pier and a trash rack, and the lower portion of the cover plate of the trash rack section is connected with the diversion pier; digging a hole in the center of the cover plate; the trash rack is provided with an orifice serving as a water inlet / outlet orifice; a diversion tunnel is connected behind the bent pipe section; the gate is a cylindrical gate and arranged above the water inlet and outlet, the gate is vertically communicated, the bottom of the gate is fixed to the inner surface of the horn mouth section concrete, the top of the gate is fixed to a cover plate of the trash rack section, and the periphery of the gate is fixedly connected with a closed shaft through a diversion pier wall. The construction difficulty can be reduced, and the maintenance convenience degree can be improved.

1. The name of the design product: water distribution handle (JY-8816). 2. The use of the design product: handle for installing on faucet, for controlling faucet. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model relates to the technical field of channel desilting, in particular to an automatic desilting device for a channel water diversion opening. The device comprises a steel frame, the steel frame is transversely arranged on a channel, a first conveying pipe is fixedly installed in the steel frame, a second conveying pipe is fixedly connected to the middle of the first conveying pipe, the second conveying pipe communicates with the interior of the first conveying pipe, the second conveying pipe is located at the bottom of the steel frame, and a desilting assembly is arranged at the position, close to the bottom end, of the outer side of the second conveying pipe; the dredging assembly comprises a rotating assembly and a driving assembly. When water in a channel impacts a plurality of driving plates or floaters impact the driving plates, the driving assembly drives the rotating assembly to rotate, the driving assembly enables the surrounding floaters to move in the water flow direction, and the problem that a large number of floaters are accumulated near the second conveying pipe, so that the floaters cannot be separated from the second conveying pipe is solved. And the second conveying pipe can smoothly guide water, so that the water taking efficiency can be improved.

This invention discloses an immersion-type cavern data center based on a water diversion tunnel, and its construction and operation methods, belonging to the technical field of cavern data centers. The data center includes a surface water system and a water diversion tunnel. A dam is installed on the surface water system. The water diversion tunnel is located within a mountain (A) on one side of the surface water system, downstream of the dam. The inlet of the water diversion tunnel is connected to the outlet of the dam via a surface ditch. Several sunken data troughs are spaced longitudinally along the bottom surface of the water diversion tunnel. Sealed data chambers are placed within these troughs. A track is installed longitudinally along the arch of the water diversion tunnel, and a movable suspension device is mounted on the track. The actuator of the movable suspension device is equipped with a data chamber grasping device. The sealed data chambers undergo immersion cooling within the sunken data troughs in the water diversion tunnel, significantly improving the cooling effect and greatly reducing the energy consumption of the data center.

The invention discloses a water diversion structure and a dish-washing machine. The water distribution structure comprises a shell with an opening in the top, and a water distribution cover detachably installed on the opening and provided with a plurality of water outlet holes. The water diversion shifting piece reciprocates up and down relative to the water diversion cover in the shell, and a water through hole is formed in the water diversion shifting piece; the guide structure is used for guiding the water distribution shifting piece to rotate in the left-right direction in the up-down reciprocating movement process of the water distribution shifting piece, so that the water through hole is selectively communicated with one of the water outlet holes; through the arrangement, on the basis of realizing water path switching, a motor can be prevented from being used for driving the water distribution shifting piece to rotate, so that the cost of an electric appliance can be reduced, and the fault that the water path switching cannot be realized due to the damage of the motor is avoided.

The invention discloses a drainage system for a large-span arc-shaped metal roof of a coal shed and a construction method.The drainage system comprises a buttress, a top plate is arranged at the top of the buttress through a main purline, the main purline is obliquely arranged, the bottom end of the main purline is close to the buttress, and a triangular supporting frame is fixed to the outer side of the buttress; the surface of the triangular supporting frame is provided with a water diversion ditch, and the water diversion ditch is provided with a communicating groove corresponding to the top plate. The inner bottom surface of the gutter is inclined, the lower end of the inclined surface is far away from the buttress, and one end of the gutter is provided with an inclined panel extending downwards. The large-span roof drainage device has the advantages that rainwater is guided to the diversion ditches on the triangular supporting frame through the slope of the roof, the main diversion pipe and the secondary diversion pipe are connected with the main diversion holes and the secondary diversion holes in the diversion ditches respectively, graded collection and efficient diversion of the rainwater are achieved, smooth drainage of a large-span roof is guaranteed, and accumulated water is reduced.

The utility model provides a quick water stop shower head which comprises a top cover with a water inlet, a surface cover with a water outlet, a water distribution structure arranged in a cavity formed by combining the top cover and the surface cover, and an elastic component. The water diversion structure is provided with at least one water passing hole, the water passing hole is communicated with the water outlet, the water diversion structure is provided with a water retaining part, and the water retaining part is communicated with the water passing hole; the elastic component is arranged between the water diversion structure and the surface cover, the elastic component is provided with a blocking part, the blocking part has deformation force and blocks the water retaining part, and in the water conduction state, the water flow acting force overcomes the deformation force of the blocking part, and the deformation force of the blocking part opens the water retaining part; in the water cut-off state, the water flow acting force is insufficient to overcome the deformation force of the blocking part, and the blocking part blocks the water retaining part. The water retaining part is arranged on the water diversion structure, and the blocking part for blocking the water retaining part is arranged on the elastic component, so that the problem that water in the water passing cavity drips after a water source is closed is solved.

The present application relates to the technical fields of water conservancy and hydropower engineering, and discloses a multi-sediment bed load river channel water intake structure, which comprises a stable bed structure, a flow guide structure and a water intake structure, the stable bed structure is arranged perpendicularly to the water flow direction of the river channel, and one end of the stable bed structure is connected with one side of the river channel; one side of the flow guide structure is connected with the other end of the stable bed structure, and the other side is connected with one end of a flood discharge gate; the water intake structure comprises a water intake weir, a pre-sedimentation tank and a sand blocking ridge, the pre-sedimentation tank is arranged on the other side of the river channel, the outer wall of the pre-sedimentation tank is connected with the flood discharge gate, the water intake weir is arranged on the side of the pre-sedimentation tank close to the flood discharge gate, and the sand blocking ridge is arranged downstream of the pre-sedimentation tank, the present application stabilizes the river regime through the stable bed structure, narrows the river bed below the flow guide structure to discharge the bed load, and the water intake structure is used for water intake and sand setting, so that the problem of water diversion and sand prevention of the river channel water intake is solved, and the operation efficiency of the water intake system is improved.

The utility model discloses high sealing water conservancy project is with splicing type water conduit, including water conduit one and water conduit two, water conduit one one end outer wall fixedly connected with the sleeve, water conduit two one end outer wall fixedly connected with the connecting sleeve. The utility model in the actual use's process, the sleeve of water conduit one and the connecting sleeve of water conduit two butt joint, and the connecting block on the connecting sleeve inserts the sliding slot of sleeve, along with push in, and the spring one in connecting block is pressed, when the plug and the inner hole of sleeve are aligned, and spring one releases the spring force and pushes the plug and inserts the inner hole, realizes water conduit one and water conduit two's firm connection, and this structure has solved the problem that traditional water conduit splicing is troublesome, and the connection is not firm and is easy to fall off, realizes fast accurate assembly, and the installation time is greatly shortened, and the plug inserts the inner hole and forms mechanical locking, prevents water conduit and separates in the water delivery process because of the water flow impact, and the water conduit installation efficiency and connection reliability are improved significantly, and the construction cost and maintenance frequency are reduced.

The application discloses a roof concrete floor anti-seepage structure and a use method thereof, and relates to the technical field of floor anti-seepage. The roof concrete floor anti-seepage structure comprises a main floor, a waterproof layer for preventing the floor from seeping, and a water collection channel penetrating through the waterproof layer at the lateral middle position of the waterproof layer. The inner bottom of the water collection channel is fixedly connected with a concentrated water guide plate, and the two side ends of the concentrated water guide plate are fixedly connected with first side water stop plates. The longitudinal direction of the waterproof layer is provided with a plurality of groups of first water guide channels and a plurality of groups of second water guide channels, and the inner bottom of each of the plurality of groups of first water guide channels is fixedly connected with a first water guide plate. The roof concrete floor anti-seepage structure has the advantages that the accumulated rainwater on the roof can be prevented from penetrating through the floor and seeping into the indoor room, the anti-seepage and water diversion effects are good, the service life of the concrete floor is prolonged, the waterproof layer is prevented from deforming and causing the anti-seepage structure to change, and the use stability of the anti-seepage structure is ensured.

The embodiment of the invention discloses a water resource quality detection method and device applied to a water diversion project and electronic equipment. A specific implementation mode of the method comprises the following steps: performing water quality detection on a water area where a water diversion project is located to obtain an earth surface water quality data set and an underground water quality data set; constructing an earth surface data structure network according to a pre-constructed water area simulation model and an earth surface water quality data set; constructing an underground data structure network; performing water pollution detection on the water area to generate an earth surface water quality detection result set and an underground water quality detection result set; performing correlation analysis on the surface water resources and the underground water resources of the water area to generate water pollution correlation characteristics; determining a surface water pollution area and an underground water pollution area of the water area; and determining the surface water quality detection result set, the underground water quality detection result set, the surface water pollution area, the underground water pollution area and the water pollution correlation characteristics as water resource quality detection results. According to the embodiment, the accuracy of the water area overall quality detection result can be improved.

The utility model relates to the technical field of building construction, and discloses a building construction rainfall drainage mechanism which comprises a water diversion plate, a filter box is fixedly connected to the front end of the water diversion plate, a plurality of drainage grooves are formed in the top end of the water diversion plate, a drainage assembly is arranged on the inner wall of the filter box, and a supporting frame is fixedly connected to the top end of the filter box. A waterproof cover is fixedly connected to the top side of the left end of the supporting frame, the left end of the supporting frame is connected with a push plate through a cleaning assembly, a connecting box is fixedly connected to the right end of the filter box, the bottom end of the connecting box is connected with a handle through a collecting assembly, and the drainage assembly comprises a filter screen located on the inner wall of the filter box and fixedly connected with the inner wall of the filter box. The bottom end of the filter box is fixedly connected with a water outlet pipe. According to the utility model, the motor is started to drive the push plate on the slide block to move rightwards and drive sundries on the filter screen to fall into the collecting box, so that the sundries on the filter screen can be cleaned, and the sundries are prevented from blocking the filter screen and influencing the filtering effect of the filter screen.

The utility model discloses a surface decontamination device for a water inlet of a hydropower station, which belongs to the technical field of decontamination of the water inlet of the hydropower station and comprises a retaining dam, a river channel is arranged on the inner side of the retaining dam, a water diversion channel is arranged at the end of the river channel, and a shielding mechanism is arranged at the top of the retaining dam. And two cantilever bracket frames are arranged on the top surface of the retaining dam. According to the rotary trash remover, when the rotary trash remover is used for salvaging sundries and trash in water, the rotary mechanism in the rotary trash remover is used for driving the rake teeth to lift the sundries and trash, when the sundries and trash move to the top end of the rotary trash remover, the first motor is used for driving the brush to rotate, the brush sweeps the rake teeth, and therefore the sundries and trash in the water can be salvaged. Therefore, sundries and garbage on the rake teeth can be completely swept, and the problem that the lifted garbage does not completely fall off and is moved into water again is solved.

The invention discloses a flood discharge, sand flushing, emptying and flow guide integrated hydraulic tunnel for a barrier lake and an application method, and relates to the technical field of flow discharge of barrier lakes, the hydraulic tunnel comprises an existing diversion tunnel, an existing tunnel transformation section, a dragon head inclined section, an upper flat section, an emergency flood discharge tunnel, an inlet accident maintenance lock chamber, an outlet working lock chamber section and an outlet flip bucket section; an existing diversion tunnel is transformed, a dragon-head-raising inclined section, an upper flat section, an inlet accident overhaul lock chamber, an emergency flood discharge tunnel and an outlet working lock chamber section are built on the upstream and downstream of the existing diversion tunnel correspondingly, an original water passing building and the emergency flood discharge tunnel are used as main diversion buildings, and the flood season overflowing requirement is combined. And the scale of surface hole flood discharge buildings such as a flood spillway and the elevation of a bottom plate are determined to meet the requirement for safe overflow flood control in the weir plug body construction period, no extra new tunnel needs to be built, and the multifunctional hydraulic tunnel integrating flood discharge, sand flushing and emptying is transformed.

The invention relates to a construction method for a long inclined shaft of a pumped storage power station. The method is suitable for the technical field of pumped storage power station construction. According to the technical scheme, the construction method for the long inclined shaft of the pumped storage power station comprises the steps that a small-diameter TBM is adopted to conduct excavation from bottom to top along the axis of the long inclined shaft to be excavated, and a pilot tunnel arranged along the axis of the long inclined shaft is formed; and after excavation of the pilot tunnel is completed, the inclined shaft reaming TBM is adopted for excavation from top to bottom along the axis of the long inclined shaft to be excavated, and the long inclined shaft is formed. In order to solve the problems that the water diversion inclined shaft of the pumped storage power station is long in construction length, large in gradient, small in construction working face, long in construction period, various in working procedure, changeable and complex in geological condition and the like, the method that a pilot tunnel is excavated through a small-diameter TBM firstly, and then one-time forming is achieved through inclined shaft reaming TBM expanding excavation is adopted; the method solves the potential safety hazard that the geological condition in front cannot be detected in manual drilling and blasting in the inclined shaft construction process and in the inclined shaft TBM construction process, the hole forming quality is improved, disturbance to surrounding rock is reduced, and the construction safety of personnel is guaranteed.

The application relates to a water guide wall with controllable permeability, and belongs to the technical field of water guide walls.The water guide wall is composed of a rubber ring, a guide pipe, a double-layer porous steel plate, a rubber bag and a controller for controlling water pressure in the rubber bag, a plurality of holes are formed in the double-layer porous steel plate, the inner walls of the holes are provided with the rubber rings, one rubber bag is arranged in each hole, the two rubber bags are connected by the guide pipe, the rubber bags in the double-layer porous steel plate are connected in series by the guide pipe to form a dragon, and the controller for controlling water pressure in the rubber bag is connected to the head and tail of the dragon.The holes in the steel plate are filled and the holes have gaps by controlling the expansion and contraction of the rubber bags, so that the switching of water blocking and water permeation of the wall body is realized.The water guide wall can be used as a permeable reaction wall supporting structure to replace the existing steel sheet pile technology, and can be switched between water permeation and water blocking after use, so that the application scenarios are more abundant.

The invention discloses a method for transporting a large steel lining to an over-small circular-arch-shaped area in a tunnel. The method comprises the steps that a water blocking ring steel lining is transported to a guide rail area on the upstream side of a small circular-arch-shaped section area of a diversion tunnel through a heavy forklift and unloaded; a binding device of the steel lining and the heavy forklift is dismantled, and the steel lining makes contact with the side guide rail in an inclined mode; pulling the steel lining to slide on the guide rail through a traction assembly to pass through the small arch-shaped section area; and after the traction assembly is removed, the heavy forklift is adopted to load the steel lining again and transport the steel lining to a mounting station. The main function is to adapt to the diversion tunnel which has been supported and is inconvenient to modify and adjust to the greatest extent, the steel lining can be smoothly transported and passed, the transportation safety of the steel lining is ensured, and the controllability of the construction period is also ensured; the method is light and easy to understand, high in practicability, convenient to construct, high in safety coefficient, novel in creativity, reusable and high in generalization performance.

The application discloses a control method for primary frequency modulation in a power dead zone range of a hydroelectric generating set, and belongs to the technical field of hydroelectric generating set regulation. The method comprises the following steps: S1, calculating H1 and H2 of a water diversion system according to the water flow inertia time constant of the water diversion system and the mechanical inertia time constant of the generating set; S2, calculating a dynamic analytical expression of the generating set power when a frequency unit step disturbance occurs; S3, calculating a first-order differential link coefficient decomposed by a second-order correction link based on the dynamic analytical expression of the generating set power; and S4, calculating the output of a PID speed regulator in a current sampling period. The scheme calculates the oscillation link transfer function parameters in a dynamic process, and a second-order system correction transfer function of a frequency given value is designed on the basis, so that the oscillation phenomenon of the generating set power does not occur when the frequency given value of the generating set changes, the problem that the power exceeds the power dead zone in the dynamic process is prevented, and a limiting link is arranged at the frequency deviation value to ensure that the power steady-state value exceeds the power dead zone range.

The application discloses a gas-water diversion anti-siphon device, which comprises a water storage tank body, a water inlet pipe joint, a water outlet pressure-limiting backflow valve assembly, a pressure-loss air inlet valve assembly and a pressure-loss water outlet valve assembly. The water inlet pipe joint is arranged at the upper half of the water storage tank body and is connected with a water supply pipe network. The water outlet pressure-limiting backflow valve assembly is arranged at the lower half of the water storage tank body and is connected with downstream water using appliances. The pressure-loss air inlet valve assembly and the pressure-loss water outlet valve assembly are arranged at the top end and the bottom end of the water storage tank body, respectively. When the water supply pipe network is shut down and negative pressure is generated, the pressure-loss air inlet valve assembly is opened to enable air to enter the water storage tank body and flow into the water supply pipe network through the water inlet pipe joint. Meanwhile, the pressure-loss water outlet valve assembly is opened to discharge the accumulated water in the water storage tank body. Meanwhile, the water outlet pressure-limiting backflow valve assembly is closed to prevent downstream water from flowing back into the water storage tank body.

The application discloses a kind of long-distance water transfer project water demand probability prediction method, comprising: collecting basic information, calculating the historical water demand sequence of water transfer project water receiving area, generating node level dynamic water demand characteristic vector;Based on dynamic water demand characteristic vector, through multiple directed dependence measure, identify the time-space dependence structure between nodes changing with time, dynamically divide high correlation, weak correlation and independent community, and track the evolution event of community;Based on community structure, fuse the geographical distance between community and water supply relationship, impose cross-domain cost factor, construct hierarchical water transfer area;Based on time-space dependence structure and hierarchical water transfer area, adopt differentiated probability prediction model and cascade time propagation mechanism, construct system level joint probability distribution.The application can accurately depict the dynamic dependence and hierarchical structure of system, improve the accuracy and reliability of prediction.