51results about How to "Reduce flood risk" patented technology

The present invention discloses a gate adjusting and controlling method suitable for a series channel downstream emergency water interruption condition, and relates to the adjusting and controlling field. The method comprises the steps of constructing a water power simulation model of a to-be-monitored channel engineering; adopting a three-point water level control method to real-timely adjust a most downstream check gate where an emergency event occurs and the gate closing rate of all last-level check gates of the most downstream check gate until the inlet flow rate and the outlet flow rate of a channel pool to which any one check gate belongs are balanced, and stopping closing the check gate of the channel pool; calculating the real-time water storage quantity of the channel pool to which the check valve belongs according to the real-time flow rate of the check gate, utilizing the real-time water storage quantity at the current moment to adjust the flow rate of the check gate at thenext moment until the real-time water storage quantity of the channel pool is equal to the target water storage amount of the channel pool, thereby adjusting and controlling the gate of the channel where the emergency event occurs. The gate adjusting and controlling method of the present invention reduces the maximum damming height in front of the gate, reduces an overflowing risk, at the same time, can adjust the water level after the emergency event is ended, and prevents the water level after the stabilization from being too high.

The invention discloses a green roof structure with the rainwater retaining ability. The green roof structure comprises a plant layer, a soil layer, a filtering layer, a water storage and drainage layer, a moisture preservation layer and a waterproof layer from top to bottom; the plant layer is composed of perennial herbs, namely sedum lineare, the planting row spacing is 4-6 cm, and the line spacing is 8-10 cm; the soil layer is composed of mixtures of light sandy soil, humus and vermiculite, and the thickness of the soil layer is 15-20 cm; the filtering layer is composed of polyester fiber non-woven fabrics and extends towards the side wall surface of a building to the part below surface soil by 5 cm, and the effective width of lap seams is 10-20 cm in the laying process; the water storage and drainage layer is composed of polyethylene concave-convex drainage boards with the thickness ranging from 30 mm to 60 mm; the moisture preservation layer is composed of moisture preservation blankets with the thickness ranging from 20 cm to 30 cm, and the moisture preservation blankets are arranged adjacently and closely; the waterproof layer is composed of polymer modified asphalt root-resisting waterproofing membranes. The green roof structure has the advantages that the land resources are saved, the green area is increased, the environment is beautified, the heat island effect is reduced, the storm runoff is lowered, and the air pollution is reduced.

The invention discloses a high-ridge cultivation method of high-yield and high-quality kiwifruit orchard establishment and relates to the field of kiwifruit orchard establishment and soil amelioration. The high-ridge cultivation method comprises the steps of (1) clearing away ground foreign matters and leveling the land parcel, (2) spreading a soil amelioration to the ground, (3) deeply turning up the soil by 50cm, (4) marking lime lines according to one half of a line spacing, starting from the edge, (5) ridging, (6) planting seedlings and (7) performing later maintenance and management. The high-ridge cultivation method of high-yield and high-quality kiwifruit orchard establishment has the following advantages: the soil layer is raised to reduce the risk that the root system suffers from water logging; the mellow soil of the original surface layer is gathered and piled up to facilitate rapid growth of the root system; coarse organic matters and organic fertilizers are added in the soil amelioration process to increase the organic substances and the permeability of the soil; the high-ridge cultivation method is suitable for a plurality of types of soil, in particular heavy soil of a high underground water level, and for sandy soil, the vertical height from the ridge top to the ridge bottom can be reduced appropriately.

The present invention discloses a reservoir group flood control capacity distribution method based on a maximal variable-weight remaining flood control capacity. According to the technical scheme of the invention, serial cascade reservoirs are adopted as equivalent reservoirs and the parameters of the equivalent reservoirs are determined. The weight of the remaining flood control capacity of each reservoir in a serial cascade reservoir group is calculated. According to the weight of the remaining flood control capacity of the serial cascade reservoirs, the weight of the remaining flood control capacity of each reservoir of all equivalent reservoirs is calculated. After that, a reservoir group flood control capacity optimization distribution model based on a maximal variable-weight remaining flood control capacity is established. The model is solved and a flood control capacity optimization distribution scheme is obtained. According to the technical scheme of the invention, the influence of flood characteristics on the reservoir group flood control capacity optimization distribution is fully considered. According to the reservoir inflow, the flood control capacity and the flood routing process, the weight of the remaining flood control capacity of each reservoir is determined, wherein the weight is varying along with different scheduling periods. The influence of subjective factors during the weight setting process of the conventional method can be avoided. The distribution scheme of the reservoir group flood control capacity is optimized and the overall effect of improving the flood control effect in a reservoir drainage basin is realized. The flood control risk of the reservoir is effectively reduced.

The invention provides a movable folding type multifunctional garage, comprising a shelter ceiling, a garage base and a support hydraulic cylinder; the movable folding type multifunctional garage comprises a shelter ceiling and a support hydraulic cylinder. The upper side of the garage base is covered with a shielding ceiling; A support cushion plate is arrange on one side side wall of that garagebase; The other side of the garage base is provided with an oil pump device and a power control box; Six moving wheels are symmetrically arranged on the bottom side of the garage base; Four supporting hydraulic cylinders are symmetrically arranged on both sides of the garage base, and the supporting hydraulic cylinders are communicated with the oil circuit of the oil pump device; Four ceiling opening and closing motors are symmetrically arranged on both sides of the garage base. The multi-function garage of the movable folding type is provided with an aperture slot structure at the middle position of the garage base, and the aperture slot structure design is similar to the ditch structure design of the garage, and the design of the structure is conducive to the maintenance and inspectionof the vehicle bottom parked on the inner side of the garage through the aperture slot structure, thereby effectively increasing the use function of the movable garage.

The invention provides a medium-and-long-term reservoir scheduling method considering a remote correlation factor and an automatic control system. The scheduling method comprises the following steps:step 1, establishing a reservoir optimal scheduling model, and determining an objective function and a constraint condition; step 2, using deterministic incoming water data, and using a dynamic programming algorithm to solve a deterministic optimal scheduling trajectory; step 3, determining a remote correlation factor possibly influencing the research area, and collecting data information in the same time period as the storage runoff; step 4, calculating a correlation coefficient between the scheduling decision and the factors, and determining the factors with relatively strong correlation andtime; step 5, determining a scheduling function of a dependent variable scheduling decision and independent variable reservoir system factors and remote correlation factors by adopting a stepwise regression method; and step 6, calculating a value of the scheduling decision, and determining a reservoir capacity value which should be reached by the reservoir at the end of the time period for scheduling of the reservoir at the time period. According to the method, the influence of reservoir system external factors on scheduling can be fully considered, and the scheduling result is optimized.

The invention discloses easy to disassemble and easy to assemble double water seal floor drain. The drain comprises a floor drain pre-embedded shell, a second seal positioning sleeve, a spiral cover plate and a sintered net, and the inner side of the floor drain pre-embedded shell is sleeved with a first a sealing positioning sleeve; the upper end of a second sealing positioning sleeve is connected to the inner side of the first sealing positioning sleeve, the top of the second sealing positioning sleeve is covered with a water screen net plate, the spiral cover plate is located above the second sealing positioning sleeve, a first blocking bowl is disposed between the second sealing positioning sleeve and the first sealing positioning sleeve, the sintering net is fixedly mounted on the inner wall of a fixing ring, and a second blocking bowl is connected to the floor drain pre-embedded shell through the fixing ring. The drain is convenient to disassemble and assemble, and is composed ofa plurality of separate assemblies, which facilitates the production and processing of the floor drain, two S-connected double water seal bypass waterway designs are formed after assembly, water sealbackflow resistance is increased, and the risk of backflow is reduced.

The invention discloses a multifunctional hydrological on-line monitoring platform. The multifunctional hydrological on-line monitoring platform comprises a reinforced concrete platform body arrangedat the middle part of a river channel, the reinforced concrete platform body is formed by a foundation body at the lower part, a stand column body at the upper part, a local bearing platform body which is connected between the foundation body and the stand column body and plays a role in stabilizing, and a stand column platform arranged at the top of the stand column body; the upstream face of thestand column body is a semi-arc face, the downstream side of the stand column body is of a boss body structure arranged along the vertical center line, the width of a boss body is smaller than that of the upstream face of the stand column body, and an isotope online sand meter, a water quality online monitor, an electronic water temperature recorder and an acoustic Doppler flow velocity profilerare arranged on the vertical face of the downstream side of the boss body; and a cantilever stretching towards the center of the river channel is arranged on the stand column platform, and a radar type self-recording water level gauge is arranged on the cantilever. The multifunctional hydrological on-line monitoring platform is high in automation degree, the problems of insufficient low water level observation guarantee rate and floating object impact of a traditional water level observation platform are solved, and therefore automatic online monitoring is achieved.

The invention provides a dynamic water storage capacity-based flood forecasting method. The method comprises the following steps: 1) TOPMODEL model parameters in a natural period are calibrated; 2) the water storage capacity of unsaturated layer soil with influences of a water conservancy project considered is determined; 3) on the basis of the model parameters in the natural state, TOPMODEL model parameters A1, A2 and B for the water storage capacity of the unsaturated layer soil with influences of the water conservancy project considered are calibrated according to actually-measured session flood; and 4) the well-calibrated parameters are adopted for carrying out flood forecasting on the watershed. According to the flood forecasting method of the invention, influences of water storage and water drainage of the water conservancy project are considered through changing the water storage capacity of the unsaturated layer soil, and the TOPMODEL model for flood forecasting is improved. When the method of the invention is adopted for flood forecasting, the flood under the influences of the water conservancy project can be better simulated, the timeliness and the accuracy of flood forecasting are improved, a basis is provided for decision making by flood prevention and control departments at all levels, the flood risks are reduced, and flood loss is reduced.

The invention relates to a launching floating transportation and underwater assembly process of a fabricated comprehensive pipe gallery. The process comprises the steps that each pipe gallery pipe joint is horizontally transported between a prefabricated yard and a field through a transporting girder vehicle; the pipe gallery pipe joints flatly fall at the top of a rail car; the rail car is drawnto a launching tackle; the launching tackle achieves slow launching along a tackle rail; water floating force is fully utilized; after the pipe gallery pipe joints are subjected to floating transportation to mounting positions, the pipe gallery pipe joints slowly sink; and after two pipe gallery gates are aligned to meet the requirement, pipe segment gravity completely acts on a substrate. According to the process, large-section and long-segment overall mounting under the water environment is achieved, the water floating force is fully utilized, and the pavement and foundation treatment construction steps of the shore side are reduced; compared with a traditional process, the construction cost is greatly reduced, and the risk of water burst after soft soil collapsing is effectively reduced; and the process of reinforcing a foundation through cement stirring and carrying out replacement is adopted, a composite foundation is formed, and the defect that a pipe jacking process cannot carryout foundation treatment is overcome.

The invention provides a sponge city system and a construction method thereof. The system comprises an ecological barrier area arranged close to a river, a leisure industry area arranged close to theecological barrier area and an urban living area arranged close to the leisure industry area. A first ecological footpath is arranged on a river levee of the river, and the ecological barrier area isarranged on the outer side of the first ecological footpath. A footpath is arranged in the ecological barrier area for people to walk through, and an ecological three-dimensional sewage interception system and an intelligent service station are arranged in the ecological barrier area. A second ecological footpath is arranged on the outer side of the ecological barrier area, the leisure industry area is arranged on the outer side of the second ecological footpath, and a tourism service module, an urban agriculture module, a rural living module and a sewage treatment plant are arranged in the leisure industry area. A regional road is planned on the outer side of the leisure industry area, the urban living area is planned on the outer side of the regional road, and an ecological corridor communicating with a sewage treatment plant is arranged in the urban living area. The system can fundamentally solve the problems of water environment, urban inland inundation and unreasonable urban functions.

The invention relates to a hydrogen circulation system of a fuel cell system, which comprises a hydrogen source, a valve group, a vortex tube, a first ejector, a second ejector and a gas-water separator, the output end of the hydrogen source is connected to the input end of the vortex tube through the valve group, and the cold end outlet of the vortex tube is connected to the jet inlet of the first ejector. The hot end outlet is connected to the jet flow inlet of the second ejector, the drainage inlet of the first ejector is connected to the hydrogen outlet of the fuel cell, the outlet of the first ejector is connected to the inlet of the gas-water separator, the gas outlet of the gas-water separator is connected to the drainage inlet of the second ejector, and the outlet of the second ejector is connected to the hydrogen inlet of the fuel cell. Compared with the prior art, the water environment of the anode side of the fuel cell can be improved, the performance of the fuel cell is improved, the service life of the fuel cell is prolonged, the control of a hydrogen circulation system is simplified, the operation reliability is improved, the size is reduced, and the power density of the fuel cell system is improved.

A curb opening drainage device for intercepting initial rainwater is disclosed and relates to ecological environment engineering. The curb opening drainage device at least comprises a rainwater inlet,a drainage groove, a curb opening and a rainwater storage and detention facility, wherein the rainwater inlet is constructed at a low-lying area of a transverse slope of a road according to design specifications and communicates with a municipal drainage system; the drainage groove is arranged around the rainwater inlet; the drainage groove extends downward along a longitudinal slope of the roadand is connected to the curb opening; and the curb opening leads to the rainwater storage and detention facility. The curb opening drainage device for intercepting the initial rainwater is capable ofnot only improving the initial rainwater interception rate of the road and effectively controlling road surface source pollution, but also ensuring smooth draining of the rainwater on the road when rainfall is large and reducing the risk of waterlogging on the road. The curb opening drainage device is suitable for new projects, reconstruction projects and extension projects of sponge city buildings, residential districts and municipal roads.

The invention relates to a kind of parallel body-connected series centrifugal pump. It belongs to a water pump. It includes pump shell, pump supporting frame, pump shaft cover-mounted on the pump supporting frame and connected with power device and bearing cover-mounted on the pump shaft and matched with pump supporting frame. Besides, it also includes the components of water inlet, water intake section, water intake cavity, water outlet, water discharge section, water discharge cavity and blade wheel, etc. Said invention also provides the concrete structure of the above-mentioned every component and their connection method.

The invention discloses electronic equipment and a method for preventing current from flowing backwards. The electronic equipment comprises a first module, a second module, a first power supply and a second power supply, the first power supply is used for supplying power to the first module; the second power supply is used for supplying power to the second module; and the first module is used for controlling the voltage of the communication path to be a second level signal when the voltage of the communication path between the first module and the second module is determined to be a first level signal after the second module is determined to be powered off. The first module can control the voltage of the communication path to be the second level signal after determining that the second module is powered off, so that the current can be prevented from flowing into the second module and the second power supply from the first module, the risk of current backflow can be reduced, the risk of device damage is further reduced, and the service life of the electronic equipment is prolonged.

The invention relates to a freezing-method stoping method for a large-water mine chamber, and belongs to the technical field of underground mine water prevention and control. According to the technical scheme, the method includes the steps that freezing holes are constructed in a roadway with a certain safety distance above the mine chamber; small freezing stations are built around adjacent chambers; positive freezing is started after freezing facility erection is completed; after a stable freezing wall is formed through observation, maintenance freezing is carried out; meanwhile, ore stoping is started to be carried out on the mine chamber; and after ore stoping is completed, chamber filling operation is conducted in time. The freezing-method stoping method for the large-water mine chamber has the beneficial effects that a freezing technology is introduced in the stoping process of the chamber to form the freezing wall with certain thickness, water on an upper plate of the chamber can be prevented from flowing into the chamber, the water gushing risk of chamber stoping is reduced, the water damage threat is reduced, and the purpose of safe stoping is achieved.

The invention discloses a fuel cell hydrogen supply and return system and a fuel cell. The fuel cell hydrogen supply and return system comprises a cell stack hydrogen outlet pipe, a cell stack hydrogen inlet pipe, a water-steam separator, a purge valve, a hydrogen supply module and a hydrogen return pump; hydrogen-containing mixed gas is converged into the water-steam separator through the cell stack hydrogen outlet pipe so as to be subjected to primary water-steam separation; hydrogen separated by the water-vapor separator is connected to a hydrogen inlet of the hydrogen return pump through a manifold; a main pipe is provided with a climbing section, an outlet of the main pipe is connected to the hydrogen inlet of the hydrogen return pump; a branch pipe is branched from the bottom of the climbing section, and the outlet end of the branch pipe is connected with the purging valve. The hydrogen separated by the water-vapor separator undergoes secondary water-vapor separation when passing through the climbing section, and separated water drops converge to the branch pipe along the climbing section and are discharged from the purge valve. The system is compact in structure and small in size, effectively realizes water-vapor separation, reduces the risk of system stack flooding, discharges waste water and waste gas separately, and improves hydrogen economical efficiency and reliability.

The invention provides a dishwasher capable of being used safely. The dishwasher comprises a dishwasher body, a water inlet pipe and a draining pipe, wherein the inlet pipe and the draining pipe are arranged on the dishwasher body; the dishwasher body comprises a washing cavity, the washing cavity is provided with a first water inlet, and a first solenoid valve for unidirectionally communicating water from the water inlet pipe towards the washing cavity is arranged between the water inlet pipe and the first water inlet; and a flow meter for detecting the amount of water entering the washing cavity is disposed between the first water inlet and the first solenoid valve, and a washing pump and a control unit are arranged in the dishwasher body; the first solenoid valve, the flow meter and thewashing pump are electrically connected with the control unit, and a draining pump connected to the draining pipe is further disposed in the dishwasher body; and the draining pump is electrically connected with the control unit, the water containing capacity of the washing cavity is V1, the amount of the water entering the washing cavity detected by the flow meter is V2, when V2/V1 is 0.55-0.9, the control unit controls the first solenoid valve to close and it is detected that the flow meter still works, and at this time, the control unit controls the draining pump to open for drainage. The dishwasher can avoid water overflow of the washing cavity, and the safety of the dishwasher is improved when the dishwasher is used.