23results about How to "Prevent flooding" patented technology

This utility model provides an age-friendly bicycle shed suitable for older residential communities, comprising a floor, a fence, and a roof. The floor has an entrance / exit ramp and a parking loop connecting the ramp. Parking areas are located on both sides of the parking loop, and entrance / exit points are formed at the locations corresponding to the ramps on both sides. The parking areas inside the parking loop enclose a waiting area in the center of the floor, which includes a pedestrian walkway. The fence has double-leaf gates corresponding to the ramps, with three states: a first state of closed ramps, a second state of open ramps and closed entrance / exit points, and a third state of open ramps and entrance / exit points. The roof is fixedly connected to the top of the fence and covers the floor. This age-friendly bicycle shed for older residential communities provides convenient parking, allows for the closure of the double-leaf gates for theft prevention, and provides a waiting area for elderly people to rest and wait, thus improving the age-friendly functionality of the bicycle shed.

The application discloses a low-voltage cable branch box with a dehumidification function, relates to the technical field of power box dehumidification, and comprises a power box, a dehumidification assembly, a cabinet door rotatably arranged on the front side of the power box, a rain and snow sensor arranged on the front side of the cabinet door, and a ventilation device arranged on the bottom of the inner wall of the power box. The dehumidification assembly comprises a separation plate, a bearing frame, an electric push rod, a connecting frame, a connecting groove, an activated carbon plate, a hollow rod, a solid rod and a separation hole. The rain and snow sensor sends signals to the ventilation device through a signal output module. After a signal input module in the ventilation device receives a rain and snow stop signal, the ventilation device is operated to quickly ventilate and dehumidify the inside of the power box. The separation plate is fixedly arranged on the left side of the power box. After rain and snow stops, the ventilation device is automatically started to quickly ventilate, so that intelligent switching of rain and snow absorption dehumidification and sunny day ventilation dehumidification can be realized, and the moisture-proof effect is improved.

The utility model relates to the technical field of drainage, in particular to a drainage system for a fan platform and a road slope of a mountain wind power plant. The road is connected with a fan platform, an excavation side slope is arranged on the side, close to a mountain, of the road, the excavation side slope is sequentially provided with a plurality of side slope structures from top to bottom in the slope direction of the excavation side slope, and the drainage system comprises a first water retaining ridge arranged on the side, away from the mountain, of the road and arranged in the extending direction of the road; the first drainage ditch is arranged on the side, close to the excavation slope, of the road and used for collecting and conveying water on the excavation slope and the road; the first intercepting ditch is arranged at a riding track between two adjacent side slope structures and is used for collecting water on the side slope structures above the first intercepting ditch; and the drainage pipeline is used for conveying water in the first intercepting ditch to the first drainage ditch. The problems of large-area scouring and water erosion of water flow to the slope surface and the road surface can be effectively solved, the stability of the slope and the roadbed is effectively improved, and a guarantee is provided for long-term stable operation of a mountain wind power plant.

The application relates to a liquid return prevention distillation system, belonging to the technical field of waste liquid treatment, which is characterized in that a phase change energy storage tank is arranged between an evaporation kettle and a condenser, the first electromagnetic valve and the third electromagnetic valve are opened, and the second electromagnetic valve is closed before the compressor is started, the phase change energy storage tank is in an evaporation section, the suction temperature is improved, and the liquid return phenomenon is avoided, the second electromagnetic valve is opened, the first electromagnetic valve and the third electromagnetic valve are closed after the evaporation kettle boils, the phase change energy storage tank is in a condensation section, the phase change energy storage tank absorbs heat, energy storage for the next start after discharge is facilitated, and quick start is realized.

This application relates to a spray humidification device and a fuel cell system. The spray humidification device includes: a main shell having an evaporation chamber and a turbulence chamber, the evaporation chamber being divided into multiple independent spray chambers, which are connected to the turbulence chamber; multiple spray nozzles disposed on the main shell, each nozzle connected to a spray chamber and spraying liquid water into the spray chamber, the liquid water being capable of vaporizing into gaseous water; multiple turbulence plates spaced apart in the turbulence chamber, the turbulence plates being used to turbulent the unvaporized liquid water and gaseous water and air; and an output pipe disposed at one end of the main shell and connected to the turbulence chamber, the output pipe also being connected to the cathode inlet of the fuel cell stack, for inputting gaseous water and air into the cathode inlet. This ensures atomization effect and prevents liquid water accumulation, thereby preventing liquid water from entering the fuel cell stack and causing flooding, thus preventing fuel cell system malfunction.

This invention relates to a method for treating and utilizing high magnesium-to-sulfur ratio chlorine-containing wastewater, belonging to the field of environmental protection. This invention utilizes inexpensive calcium alkali to treat high magnesium-to-sulfur ratio chlorine-containing wastewater. During the treatment process, dilute hydrochloric acid is used as a circulation starter. Taking advantage of the difficult-to-remove chloride ions in the wastewater, the calcium alkali is used to generate calcium chloride solution, thereby continuously recovering sulfate ions from the high magnesium-to-sulfur ratio wastewater. Magnesium is converted into magnesium hydroxide, transforming into valuable by-products such as calcium chloride and gypsum, thus achieving resource utilization of waste. This method reduces the environmental impact of wastewater discharge, while also reducing treatment costs and achieving resource recycling. It is highly feasible for existing enterprises and has significant economic, social, and environmental benefits.

The application relates to the technical field of fuel cell engine control, in particular to an anode control method and device of a fuel cell engine and a vehicle, wherein the method comprises the following steps: collecting an actual temperature of an environment currently where the fuel cell engine is located; in the case that the actual temperature is greater than or equal to a first preset temperature threshold and less than or equal to a second preset temperature threshold, acquiring a current power of the fuel cell engine; and generating a first hydrogen discharge action of exhaust anode waste gas according to the current power of the engine and / or a target humidity of a stack and a current humidity. Therefore, the problem that, in the prior art, a water distributor cannot be adjusted according to different working conditions and it is difficult to meet the humidity requirement of a stack membrane under different working conditions, thereby affecting the performance and service life of a fuel cell, is solved.

The embodiment of the invention provides a fuel cell hydrogen injection circulation system and a control method and device, and belongs to the technical field of fuel cells. The system comprises a hydrogen storage bottle, a pressure reducing valve, a regulating valve, an ejector, a steam-water separation device and a battery stack connected between the ejector and the steam-water separation device, a primary inlet and a secondary inlet of the ejector are respectively connected with the regulating valve and the steam-water separation device, and the method comprises the following steps: acquiring an inlet pressure value of a gas inlet of the battery stack; controlling the inlet pressure value to be changed into a rated pressure value for a first preset time; determining an operation condition according to the average working current in the first preset time and a preset current threshold value; and when the operation working condition is a low-current-density working condition, changing the inlet pressure value into a target pressure value according to the rated pressure value, the average working current, a preset current threshold value and a preset pressure parameter so as to discharge generated water in the battery stack. The embodiment of the invention aims to avoid the problem of galvanic pile flooding under a low-current-density working condition, and the reliability of a fuel cell system is improved.

This utility model relates to the field of water separator technology, and more particularly to a water separator suitable for high-power systems. It includes a water separator housing, within which a horizontal partition at the bottom divides the space into an upper gas circulation chamber and a lower water storage chamber. The horizontal partition has several drainage holes. The gas circulation chamber is divided into an inlet chamber and an exhaust chamber by a vertical partition. A hydrogen return inlet is located on the upper part of one side of the inlet chamber. Several downwardly inclined inlet baffles are staggered on the side wall of the inlet chamber, and several upwardly inclined exhaust baffles are staggered on the side wall of the exhaust chamber. The top of each exhaust baffle has a downwardly curved barb. Stepped structures are also provided on the side walls of the inlet and exhaust chambers. Even with a large gas flow rate in a high-power fuel cell system, this design can improve water separation efficiency, effectively separating hydrogen from water, preventing large amounts of water from entering the hydrogen circulation pump and fuel cell stack, thus ensuring the stability of the hydrogen circulation pump and fuel cell system.

This utility model discloses a water-saving seedling box based on a support medium for wheat germination detection. The box body is composed of a support frame and transparent splicing panels to ensure light penetration. The box contains multiple layers, each with seedling troughs filled with sponge. A liquid level sensor is installed on one side of each trough to monitor water volume in real time. A spray pipe with a sprinkler head is installed above the troughs, and a drain outlet is opened on one side at the bottom, connected to a water collection tank at the bottom of the box via a drain pipe to drain excess water and prevent flooding of the wheat seedlings. The water collection tank has an overflow outlet and a debris preventer to prevent impurities from entering. The water collection tank is connected to a water supply pipe via a water pump to achieve water recycling. In addition, a water collection component is installed on the top of the box to collect rainwater. This utility model, through its drainage, water recycling, and rainwater collection designs, effectively avoids water accumulation problems, achieves water conservation and efficient utilization, and provides a good seedling environment for wheat germination detection.

This application belongs to the field of battery production line technology and discloses a steam condensate recovery and utilization system and a battery production line. The steam condensate recovery and utilization system includes a first water tank, a second water tank, and a hot water supply device. The first water tank forms a first receiving cavity and has a first inlet, a second inlet, and an outlet, all connected to the first receiving cavity. The first inlet is used to connect to the steam condensate supply device in the battery production line. The second water tank forms a second receiving cavity and has a third inlet connected to the second receiving cavity. The water inlet of the hot water supply device is connected to the outlet via a circulation pump, and its water outlet is connected to both the first and third inlets. During the process of the circulation pump pumping the steam condensate from the first water tank into the hot water supply device for recycling, some of the water returning from the water outlet will enter the second water tank through the third inlet, effectively preventing the first water tank from overflowing and improving energy utilization.

This utility model discloses an outdoor power distribution room with photovoltaic power generation function, belonging to the field of power engineering technology. The utility model includes a pre-embedded foundation, a ground foundation fixed to the top of the pre-embedded foundation, a support base fixed to the top of the ground foundation, and a base plate fixed to the top of the support base; anti-fall railings are installed around the top of the base plate. This utility model, through the setting of the pre-embedded foundation, ground foundation, support base, and base plate, raises the main body of the power distribution room, preventing the main body from being located at a low-lying bottom where water could easily flood in the future. The hollow interior of the support base reduces weight and material consumption, avoiding a significant increase in the overall weight and material consumption of the foundation due to the increased height of the main body of the power distribution room. At the same time, the higher height of the support base effectively reduces the possibility of people coming into contact with the main body of the power distribution room, improving electrical safety; it also increases the waterproof effect and reduces the possibility of contact by non-professionals.

This invention provides a real-time early warning method and system for industrial production safety risks based on AI visual inspection. Addressing the shortcomings of traditional industrial safety monitoring, such as high reliance on manual labor, slow response, high false alarm and false negative rates, and failure due to network outages, it proposes an early warning scheme combining cloud-edge-device three-level collaboration and multimodal AI visual fusion. The system consists of four layers: terminal multimodal perception, edge intelligent computing, cloud management platform, and hierarchical early warning linkage. It collects on-site data through dual-light fusion of visible light and infrared thermal imaging, and achieves integrated real-time detection of personnel violations, equipment anomalies, and environmental hazards based on an improved YOLOv8 lightweight model combined with multi-algorithm fusion. Millisecond-level analysis and hierarchical early warning are achieved at the edge, with multi-sensor cross-validation for voltage drop false alarms. Offline early warning is possible even when the network is down, while network synchronization with the cloud enables model iteration and closed-loop management.

This invention discloses an auxiliary conveying mechanism for cable production and its working method. The auxiliary conveying mechanism is mounted on a cooling water tank body and includes a bridge trolley and guide rails. Two guide rails are symmetrically arranged outside the side walls of the cooling water tank body and laid along its length. The bridge trolley spans the width of the cooling water tank body, and the bottom of the trolley's upright plate is slidably connected to the two guide rails. The cable end that needs to pass through the cooling water tank body is placed on the bridge trolley and pulled from one end of the extruder to the other by a traction rope. This invention reduces the difficulty of conveying heavy cables on the cooling water tank during the cable threading process, saves manpower, and avoids water immersion of the cable end.

This invention belongs to the field of materials science, specifically disclosing an electrocatalyst, its preparation method, and its application. The electrocatalyst of this invention comprises a copper layer, a copper nanosheet array, and a quaternary ammonium salt polymer; the copper nanosheet array is disposed on the surface of the copper layer; the copper nanosheet array is composed of arranged copper nanosheets; the quaternary ammonium salt polymer is distributed on the surface of the copper nanosheets and between adjacent copper nanosheets. The electrocatalyst of this invention uses a quaternary ammonium salt polymer supported on the surface of and between the copper nanosheets, enabling the electrocatalyst to possess a robust and efficient gas-liquid-solid three-phase interface in a strongly acidic medium, effectively improving the selectivity, carbon conversion rate, and operational lifespan of the electrocatalyst for CO2 reduction.

The invention belongs to the technical field of oil exploitation, and discloses a block integral water plugging method. The method comprises the steps that a lower horizontal drainage well is arranged in a bottom water layer of an oil layer, an upper horizontal drainage well is arranged in an upper water layer of the oil layer, a plurality of production wells are arranged in the oil layer, and a plurality of drainage wells are arranged on the edge of a block and used for draining water to prevent edge water from invading; the production wells and the drainage wells form a concentric-square-shaped well network, steam injection pipe columns are tripped into the production wells respectively to preheat an oil layer, and thermal communication is formed in the production wells; the horizontal drainage well on the oil layer conducts drainage and pressure reduction, and it is ensured that the pressure between the top water and bottom water oil layers is kept stable. According to the block overall water plugging method, the heavy oil reservoir can be effectively utilized, the water content of a production well is reduced, and the efficiency is improved.

The application discloses a hydrogen fuel control system for unmanned aerial vehicles, which comprises a hydrogen bottle, a pressure reducing valve, a hydrogen inlet valve, a first pressure sensor, a fuel cell stack, a steam-water separator, a double-variable peristaltic pump, a second pressure sensor, a controller, a drain valve, a temperature sensor and a current sensor. The system constitutes a closed hydrogen circulation loop to recover unreacted hydrogen. The controller monitors the hydrogen circulation pressure, the stack temperature and the load current in real time through a sensing network composed of double pressure sensors, a temperature sensor and a current sensor, analyzes the load change and the water-heat state based on the built-in program, and cooperatively regulates the rotating speed and the extrusion degree of the double-variable peristaltic pump, dynamically optimizes the flow and the flushing intensity of the hydrogen circulation. The system solves the water-heat management problem of the fuel cell of the unmanned aerial vehicle under dynamic working conditions, improves the hydrogen utilization rate, effectively prevents water flooding and membrane dryness, and guarantees the efficient, stable and long-life operation of the system.

The application relates to the technical field of isopropanol purification, in particular to a high-purity isopropanol purification device and process; the device comprises a hydrogenation reactor, a gas-liquid separator, a preheater, a plate-type rectifying tower, a reboiler, a condenser and a dehydration tower; the plate-type rectifying tower comprises a tower body; the tower body is sequentially provided with a gas outlet, a liquid inlet, a feed inlet and a discharge outlet from top to bottom; a tower tray is arranged in the tower body; a downcomer is arranged on one side of the tower tray; the cleaning rod is arranged to drive the filter cloth to move towards the downcomer, so that the filter cloth pushes the foam on the liquid surface to move towards the downcomer, until the filter cloth contacts the downcomer, the filter cloth extrudes and breaks the foam blocked on the surface, thereby reducing the foam dispersion system, not only making the gas-liquid contact more uniform, reducing the mass transfer resistance, improving the separation efficiency of isopropanol-ketone, but also stabilizing the gas-liquid flow, avoiding the problems of liquid flooding or tower flooding, and prolonging the continuous operation time.

The present application relates to a kind of expansion valve opening degree control method in the frequency of heat pump host starting, comprising the following steps: obtaining the return water temperature and ambient temperature of heat pump system starting, and the reference opening degree of expansion valve of heat pump host starting is obtained by correcting return water temperature and ambient temperature;Every interval valve period obtains the compressor frequency value of current heat pump host, and the current compressor frequency rise value is calculated according to the compressor frequency value of last valve period;Compressor frequency rise value is corrected;The current opening degree value of expansion valve is determined according to the reference opening degree of expansion valve, the corrected compressor frequency rise value and frequency variation coefficient.The expansion valve opening degree control method of heat pump host starting of the present application can make the setting of expansion valve opening degree more comply with the variation of system refrigerant flow under different frequency in compressor starting stage, make the control of refrigerant flow more accurate, can effectively avoid the problem that expansion valve opening degree and system refrigerant flow are extremely mismatched in unit starting stage, to avoid the problem that compressor appears back liquid phenomenon.

The utility model discloses a double-layer inclined directional cultivation mold for Chinese yam, and belongs to the technical field of agricultural cultivation. The cultivation mold comprises a planting groove, a fixed plate and a movable plate, wherein the planting groove is obliquely arranged; the fixed plate is fixedly arranged in the planting groove; the movable plate is clamped in the position, corresponding to the upper part of the fixed plate, in the planting groove; the U-shaped grooves are respectively formed in the fixed plate and the movable plate, are linearly distributed and are used for planting Chinese yams; the drainage pipes are fixedly arranged at the lower inclined ends of the planting grooves and are arranged corresponding to the U-shaped grooves; an adjusting assembly used for adjusting the opening size of the drainage pipe is arranged at the end, away from the U-shaped groove, of the drainage pipe. According to the double-layer inclined directional cultivation mold for Chinese yam, a double-layer planting structure is formed through the combined design of the fixed plate, the movable plate and the U-shaped groove, more Chinese yam plants can be planted on the land in unit area, the planting density is effectively increased, the land utilization rate and agricultural production benefits are improved, and the yield is increased without enlarging the area.

This application relates to a novel structured packing mechanism for distillation, installed inside a distillation column, comprising an upper structured packing assembly and a lower tray assembly. The upper structured packing assembly includes at least one set of packing units, each packing unit comprising a cylindrical support frame with a packing layer within the support frame. The packing layer consists of multiple parallel corrugated plates, with a gas phase channel formed between adjacent corrugated plates. The lower tray assembly includes at least one tray group, each tray group comprising two tray units. Each tray unit has a gas phase channel and a downcomer, with adjacent downcomers staggered. The upper structured packing assembly and the lower tray assembly are connected by a support rod, and the top of the support rod is detachably fixed to the top of the distillation column. This invention offers advantages such as high mass transfer efficiency, stable operation, strong adaptability, and ease of installation and maintenance, and is applicable to various distillation processes.

The utility model discloses a hydraulic rotation checkgate well which comprises a checkgate well body, an H-shaped inner plate is fixedly connected to the center of the inner wall of the checkgate well body, a rotating shaft is rotatably connected to the upper half portion of the inner plate, an upper door plate is arranged on the outer side wall of the rotating shaft, and pin shafts are arranged on the two sides of an outer block. The pin shaft position of the outer block is hinged to the inner wall of the concave frame, and the pin shaft position of the pin shaft seat is fixedly connected with the end of a first hydraulic cylinder. Through hydraulic driving, the opening angle of the upper door plate can be flexibly adjusted according to actual requirements, so that the water flow is controlled, and the upper door plate is closed at ordinary times to eliminate pollution of confluence sewage to a downstream river channel; and in the flood season, the upper door plate is opened, accumulated water on the upstream road is rapidly drained into the urban drainage system through the overflow port, rapid response can be achieved, the opening degree is rapidly adjusted, the flood discharge capacity is improved, the pressure of the riverway and the urban drainage system is effectively relieved, and flooding is prevented.

The invention relates to the technical field of fuel cells, and provides a gas diffusion layer and a preparation method and application thereof. The gas diffusion layer comprises a substrate layer and a microporous layer attached to the surface of one side of the substrate layer, the substrate layer is provided with stacked carbon fibers, substrate layer pores are formed among the carbon fibers, the microporous layer comprises stacked conductive particles, at least part of the conductive particles permeate into the substrate layer, and the microporous layer comprises first pores and second pores; wherein the aperture of the first pores is R1, R1 is larger than or equal to 5 microns and smaller than or equal to 10 microns, the aperture of the second pores is R2, R2 is larger than or equal to 1 microns and smaller than 5 microns, and the pore area rate of the first pores is 25%-35%. According to the gas diffusion layer, through the synergistic effect of the multi-stage distribution pores of the pore size, the air permeability is effectively improved while the performance is improved, so that the gas diffusion layer has good drainage performance and air permeability.