157 results about "Safety water" patented technology

The invention discloses a safety water quality detecting and sampling device which comprises a motor, LED (light-emitting diode) lamps, a level gauge, a damping spring, a rotating shaft, a water conveying pipe, water taking heads, filtering screens, a drilling bit, an air bag, a water collection bottle, a sampling spoon and a timer. A handle is arranged at the top end of the motor, hand shanks arearranged on two sides of the motor, antiskid sleeves sleeve the hand shanks, the LED lamps are arranged on the side wall of the motor, the timer is arranged on the motor, the level gauge is arrangedon the motor, the motor is connected with the rotating shaft through a connecting part, the damping spring is arranged in the connecting part, the drilling bit is arranged at the bottom end of the rotating shaft, the water taking heads are arranged on two sides of the bottom end of the rotating shaft, through holes are formed in the water taking heads, the filtering screens are arranged in the water taking heads, the water conveying pipe is arranged in the rotating shaft, one end of the water conveying pipe is connected with the water taking heads, the other end of the water conveying pipe isconnected with the water collection bottle, the air bag is arranged on the water conveying pipe, scales are arranged on the rotating shaft, and the sampling spoon is arranged on the side wall of the bottom end of the drilling bit. The device is convenient in detection, simple in structure and convenient to use, and popularization is facilitated.

A foldable / collapsible Child-Safety Water Spill-Guard with soft magnet or suction cup grippers attaches itself to a bathtub or Jacuzzi in an inclined fashion at any preferred place with out a need of permanent attachments. This child-safety water-spill guard comprises of a water proof sheet of plastic or fabric approximately the length of a standard tub with stiff nylon or plastic ribs spaced through out the length of the sheet. Each rib is essentially a two piece configuration, the longer of these rib pieces essentially have a wedge at the bottom; whereas under side of each rib is a soft / flexible magnet or suction cup secured with fusion, glue or plastic-weld etc., so when the safety spill-guard is placed and stretched along the long side of a bathtub the bottom section of the safety spill-guard is folded and wrapped on the inside of the bathtub hanging down from the rim sticking to the inner surface securely. While the rest of the guard sits over the edge of the tub making an inclined surface protruding outward approximately a foot or so. The water spillage from the tub falls on the extended portion of the guard and is momentarily flows back to the tub. This very secured yet very flexible safety water spill-guard can prevent slip hazard for kids and also protect the bath floor. Another important feature of this child-safety water spill-guard is that kids taking bath and playing in the bathtub are visible and are under surveillance by the parent or guardian. Another advantage is that this guard can be moved and placed again with extreme ease and can be folded, collapsed and stored in a compact place.

The invention belongs to the field of chemical industry and discloses a purifying system of an exhausting gas of yellow phosphorus. The purifying system comprises a gas separator, a primary safety water seal, a secondary safety water seal, a third safety water seal, an alkaline washing tower, a water washing tower, a swirler, a primary U-shaped water seal, a secondary U-shaped water seal and a water-steam separator. The purifying system of the exhausting gas of the yellow phosphorus can be used for effectively removing a large amount of harmful substances, such as phosphorus, sulphur, fluorine, arsenic, and the like in the exhausting gas of the yellow phosphorous and obtaining the usable fuel gas of the exhausting gas of the yellow phosphorus, thereby meeting the requirements of fuel gas equipment on the harmful substances, such as phosphorus, sulphur, fluorine, arsenic, and the like. The fuel gas generated by utilizing the purifying system can be used for producing series products, such as industrial phosphoric acid, food phosphoric acid and fine phosphate; and therefore energy resources are greatly saved, and the production cost of chemical enterprises is reduced.

The present invention relates to a longitudinally divided emergency core cooling (ECC) duct in order to efficiently inject safety water to core of a pressurized light-water nuclear reactor. The ECC duct includes side supports for preventing the flow-induced vibration in the annular downcomer, and has structural stability while thermally expanding and contracting. A longitudinally divided ECC duct for emergency core cooling water injection of a nuclear reactor is provided on the periphery of a core barrel of a nuclear reactor, includes an emergency core cooling water inlet facing a direct vessel injection nozzle, and extends in a longitudinal direction of the core barrel. The longitudinally divided ECC duct is divided into a plurality of longitudinally-divided ducts in the longitudinal direction of the longitudinally divided ECC duct.

In a water-supply valve apparatus comprising a first on-off rod 4 for opening and closing a discharge outlet 22 with an intake lever 6, and a second on-off rod 5 for turning on and off the flow of the water from a supply-tube 1 by pressing a pushing means 7, regardless of the operation of the first on-off rod 4, the first on-off rod 4 comprises a stopper having a T-shaped hole arranged at the position where the first on-off rod 4 is at right angles to the second on-off rod 5, the second on-off rod 5 comprises an elastic hook 210 passing through the horizontal part 110 of the T-shaped hole and being hooked on the vertical part 120 of the T-shaped hole, and an anti-rotation wing 200 for preventing the second on-off rod 5 from rotating. The anti-rotation wing 200 is inserted into an anti-rotation hole 300 formed in a guide hole 71 of the pushing means 7. Therefore, the safety water-supply valve apparatus is able to prevent a user's hand from getting bunt accidentally and water from leaking unnecessarily due to careless handling.

The invention provides an underwater alarming method and an intelligent hand ring, wherein the method comprises the following steps of: detecting the current water pressure, determining the current water depth according to the current water pressure; judging whether the current water depth is out of a preset safety water depth range; and if yes, sending an alarming message to an associated terminal. According to the embodiment of the invention, the alarming message is intelligently sent, the probability of accidents such as drowning is reduced, and the safety of a user in water is improved.

The invention discloses a method for breaking heat dormancy of lettuce seeds. The steps of the method are as follows: 1) preparing a mixed aqueous solution of a gibberellin (GA3) and a cytokinins (6-BA), with a concentration of 1-20mg / L, according to a certain proportion; 2)fully mixing seeds ,vermiculite and the mixed aqueous solution by weight ratio of 2:4:1,and putting the mixture into an enclosed container to stay for 1-5 days at a temperature of 5 -15DEG C; 3)using a sieve to eliminate substrates from the processed seeds, re-drying the seeds to the safety water content and storing by sealing. The method provided by the invention can break the heat dormancy of the lettuce seeds, improve seed germination, field emergence rate and seedling emergence speed.

The invention discloses an emergency core cooling system for a nuclear power plant. The system specifically comprises a high-pressure safety injection pump, a low-pressure safety injection pump, a safety water injection tank, an automatic pressure relief system, a pressure stabilizer, a direct injection pipeline, a waste heat removal heat exchanger, a pressure container and a containment pressuresuppression pool, wherein the automatic pressure relief system, the containment pressure suppression pool, the pressure stabilizer, the pressure container and the direct injection pipeline are arranged in a containment, and the high-pressure safety injection pump, the low-pressure safety injection pump, the safety water injection tank and the waste heat removal heat exchanger are arranged outsidethe containment. Compared with the prior art, the system provided by the system combines the low-pressure safety injection function and the waste heat removal function, so that system configuration issimplified, and economical efficiency is improved. The pressure suppression pool is arranged in the containment, and a containment pit is removed, so that the volume of the containment and the configuration of a recirculation filter are greatly reduced. The safety water injection tank is arranged out of the containment, the problems that the containment penetration pieces is increased, and pipeline arrangement is complex and the like caused by the arrangement of a refuelling water tank in the containment are eliminated.

The invention relates to a method for lifting an inverted cone shell water tank of a reinforced concrete water tower. The method comprises the following steps of: positioning a suspension rod, setting hydraulic equipment in place, primarily lifting the water tank, assembling a suspension wire rod on a support of an upper ring beam of the water tank, and placing lifting steel wedges hanged by steel wires outside a branch cylinder wall, wherein the lifting steel wedges are evenly distributed along the branch cylinder wall at 2,000 millimeter intervals, and tips support the bottom part of the water tank and are arranged in the gap between a lower ring beam and the branch cylinder wall; and when the water tank is lifted, making the steel wedges lifted along with the water tank; hanging suspension feet-hands, fixing the water tank at a high altitude, disassembling the lifting equipment, and casting ring plate concrete. The method fundamentally solves the problem that the water tank swings and bumps the cylinder wall when lifted; when the lifting reinforced bars are broken and the water tank falls off, the lifting steel wedges can fix the water tank on the branch cylinder, so that the huge loss caused by the broken reinforced bar and the falling off of the water tank is avoided; and by the method, the water tank can be stably, safely and quickly lifted up to the designed elevation of the cylinder top. By adopting the method, two hot rolling and two cold rolling 100t safety water towers of the Wuhan Iron and Steel, two continuous casting 200t and 800t water towers of the Wuhan Iron and Steel and the like can be successfully assembled.

The invention provides an auto-control water source layering water taking method and system based on a three-dimensional algae ecology model. The method comprises the steps that 1, water quality, hydrology and meteorology data of a water intake in a water source water body are collected through a data collecting system; 2, the obtained water quality, hydrology and meteorology data are processed through a simulation forecasting system, the pollution load of rainfall runoff entering the water body is calculated in a simulating mode through a watershed hydrologic model, the algae distribution condition in the water source water body is predicted in a simulating mode through a water quality ecology model, and vertical distribution data of algae at the water intake are obtained; 3, the vertical distribution data of the algae at the water intake are analyzed by an automatic control system to determine a lowest algae concentration water layer at the water intake, and a water taking device is controlled to take water at the lowest algae concentration water layer. According to the method, it can be scientifically guaranteed that the algae concentration of the taken water is lowest within the range of the water intake, the phenomenon that water plant production even user health are threatened due to the problem of outbreak growth of the algae is effectively avoided, and the important significance on urban safety water supply is achieved.

The invention relates to a blast furnace soft water closed-recirculation cooling system and belongs to the technical field of blast furnace cooling. The system comprises a high-pressure cooling unit, a low-pressure cooling unit, a degassing tank, a heat exchanger, a pressure-stabilized expansion tank set, a water supply pump set, a high-pressure water supply pipe, a low-pressure water supply pipe, a high-pressure return water pipe, a cooling-wall water supply ring pipe, a bottom water supply ring pipe, a return water ring pipe, and a return water master pipe. The system has the advantages that the high-pressure pump set and the low-pressure pump set are integrated into a water supply pump set for the blast furnace soft water closed-recirculation cooling system; the low-pressure pump set, water supply pumps, safety water supply pumps and coolant water pipes are fewer in the integrated water supply pump set, and water supply and return pipelines are fewer and simplified; the low-pressure cooling equipment is cooled by cooling the cooling water of the high-pressure cooling equipment, so that the amount of cooling total-circulation water and lift are reduced for blast furnaces. Therefore, initial investment is reduced, and subsequent operational cost is reduced.

The invention discloses an urban water supply pipeline network booster pump station AR (augmented reality) management system comprising an intelligent mobile phone, an urban water supply pipeline network booster pump station three dimensional code, a cloud service platform and a PC end; urban water supply pipeline network booster pump station AR (augmented reality) management application software is arranged in the intelligent mobile phone, and used for setting the virtual world onto the reality world on an intelligent mobile phone screen for interactions; the urban water supply pipeline network booster pump station three dimensional code is used for storing the urban water supply pipeline network booster pump station detail contents; the cloud service platform is used for computing, storing and managing an urban water supply pipeline network booster pump station model and operation after sales manage information; PC end urban water supply pipeline network booster pump station AR management application software is arranged in the PC end; the urban water supply pipeline network booster pump station AR (augmented reality) management system is simple in structure, easy to use, low in cost, and can realize urban water supply pipeline network booster pump station safety water supply management, thus providing stable water supply and anti-water hammer advantages.

The invention relates to a safety water circulating system in a server cabinet. A water storage portion is arranged on the lower portion of a closed water tank, a cavity is reserved on the upper portion of the closed water tank. An outlet end of a cooling system is communicated with the cavity on the upper portion of the closed water tank through a second water outlet pipeline, an inlet end of the cooling system is connected with a water outlet end of a water pump through a second water inlet pipeline, a water inlet end of the water pump is connected with a second connector of a second three-way electromagnetic valve through a first water return pipeline, a first connector of the second three-way electromagnetic valve is connected with an outlet end of a surface cooler through a first water outlet pipeline, the bottom of the water storage portion of the closed water tank is connected with a first connector of a first three-way electromagnetic valve through a water drainage pipeline, the water pump is connected with a first contact of a second signal processor through a wire, the first three-way electromagnetic valve is connected with a second contact of the second signal processor through a wire, the second three-way electromagnetic valve is connected with a third contact of the second signal processor, and a vacuum unit is communicated with a cavity of the closed water tank through a vacuumizing pipeline. The safety water circulating system guarantees safety of IT (information technology) equipment in the cabinet. The safety water circulating system can reasonably effectively utilize space, and is simple and reliable in structure and convenient to mount and adjust.

The invention relates to the field of water processing equipment, and particularly relates to a filling water quality remote monitoring device and a system. The GPRS-based filling water quality remote monitoring device comprises a receiving module, a data analysis module, and an alarming module, wherein the receiving module is used for receiving in-tank water quality index data acquired by a data acquisition terminal arranged in a water tank; the data analysis module is used for comparing and analyzing the water quality index data and a set standard value to determine whether the in-tank water quality data reach the standard; and the alarming module is used for giving an alarm if the water quality data exceed the standard and not giving an alarm if the water quality data reach the standard. According to the GPRS-based filling water quality remote monitoring device and the system provided by the invention, the filling water quality data can be monitored remotely and in real time, a manager can perform water quality contorl conveniently, whether the in-tank water quality meets the standard is monitored in real time, the manager can be informed to take corresponding measures timely, and safety water drinking by residents is ensured.

The invention relates to an accident safety method and system for water supply. A circulating cooling water supply pump sucks cooling water from a circulating pump station water suction well and delivers the cooling water to an equipment flow pipe; return water returns into the circulating pump station water suction well; in the case that the circulating cooling water supply pump fails or powers off, an accident diesel engine water supply pump automatically starts up, and before the pump starts up, an accident water tank supplies water to equipment; the accident water tank and the circulating pump station water suction well form a safety water supply circulation loop through an inflow pipe and an overflow pipe; during water supply, the circulating cooling water supply pump supplements water to the accident water tank; water level of the accident water tank is observed in a control room through a level meter. Compared with the prior art, the accident safety method and system for water supply has the advantages that the accident water tank is disposed in column space of a workshop, load of the workshop is never increased, and investment is low; the safety water supply circulation loop is formed through the inflow pipe, an outflow pipe and a lower horizontal overflow pipe, the water in the accident water tank is kept flowing, water worsening is avoided at the premise of meeting safety of water supply, and the anti-freezing problem is solved.

The invention relates to an automatic temperature control cooling device for plastic granulation. The device comprises a trough engraved with a safety water line, an inflow assembly, an outflow assembly at the safety water line and a temperature control assembly. Wherein, the inflow assembly includes an inflow pipe communicated with the trough and an electromagnetic valve disposed on the inflow pipe. The outflow assembly at the safety water line includes an outflow pipe located at the safety water line and communicated with the inside of the trough by an outlet at the safety water line. And the outlet at the safety water line is abreast with the safety water line. The temperature control assembly contains a temperature control module outside the trough, an input module and a test module fixed in the trough and below the safety water line, with the temperature control module, the input module, the test module and the electromagnetic valve connected by circuits. In the plastic granulation process of the invention, plastic particles with a shrinkage hole in the center can be decreased to meet the requirements of injection molding. Besides, the amount of cooling water in the trough can be reduced, thus saving energy, protecting the environment and indirectly improving economic benefits.

The invention relates to the technical field of household appliances, in particular to a novel safety water dispenser. A safety protection door is arranged on one side of a water dispenser body, a first magnetic stripe is arranged on one inner side of the safety protection door, a second magnetic stripe corresponding to the first magnetic stripe is arranged on the other side of the water dispenser body, a water collecting switch is arranged inside the water dispenser body, a storage box is arranged below the water dispenser body, a waste water box is connected onto the side wall of the storage box through a connecting screw, a bucket is arranged above the water dispenser body, and a liquid level sensing head is arranged at the inner bottom of the bucket and connected with an alarm. The novel safety water dispenser is simple in structure, novel in design and safe and convenient to use, children can be prevented from being scalded as the safety protection door is arranged at a water outlet, waste water can be contained when a user uses the water dispenser as the special waste water containing vessel is arranged, great convenience is brought to the user, the novel safety water dispenser further has an alarm function, dry heating can be prevented, and service life of the water dispenser is prolonged.

An intelligent safety water storage barrel comprises a water barrel body, a sealing cover device and a controller. The sealing cover device comprises a barrel cover device, cover opening handles, safety buckles and spiral positioning handles. The barrel cover device comprises a barrel cover and a lock catch device. The barrel cover is provided with cover opening guide holes, positioning screw holes and spring holes. First springs are arranged in the spring holes. The lock catch device comprises guide sleeves, guide columns, a lock catches and second springs. The cover opening handles are provided with annular grooves. The safety buckles are provided with unlocking holes and safety lock holes. The controller comprises a water inlet solenoid valve, a water level sensor, a human body sensor and a drainage solenoid valve. The barrel cover is opened with hands and feet, the safety buckles are opened, the lock catches need to be locked in the opened positions through the spiral positioning handles, and all the lock catches are separated from the corresponding lock catch holes; and meanwhile, when a child opens the barrel cover and makes contact with the position within the detection range of the human body sensor, the drainage solenoid valve is controlled by the controller to be opened, and water in the water barrel is drained so as to prevent the child from drowning.

The invention discloses a novel high-purity acetylene purification production system and a technological process thereof, belonging to the technical field of acetylene production. The high-purity acetylene purification production system provided by the invention is high in purification degree and capable of saving cost. The system comprises a carbide slag settling pond, an acetylene generator, anacetylene gasometer, a safety water seal, a purifying tower, a purifying tower water tank, a neutralizing tower, a neutralizing tower water tank, a gas-water separator, a low-pressure dryer, a compressor, a high-pressure oil-water separator drying box and an acetylene filling system which are connected in sequence, wherein the height of a packing layer of the purification tower is 7-11m, the purification tower comprises a first purification tower and a second purification tower, and the second purification tower is connected with the neutralizing tower. The high-purity acetylene purification production system designed by the invention is high in acetylene purification purity which can reach 99% or above, and is reduced in the use cost of sodium hypochlorite.

The invention relates to a water dispenser and discloses a water dispenser control method and a water dispenser control system which are capable of effectively avoiding that hot water or low-temperature water received by users is mixed with normal-temperature water. The water dispenser comprises a water storage unit and a water dispensing outlet communicated with the water storage unit, and the water dispenser control method includes the steps of heating or refrigerating the water in the water storage unit according to a heating instruction or refrigerating instruction to enable the water temperature of the water storage unit to reach a preset temperature; controlling to open or close the water dispensing outlet according to the water dispensing instruction of one user after the water temperature in the water storage unit reaches the preset temperature; controlling to close the water dispensing outlet when a water quantity in the water storage unit is less than a preset safety water quantity.

The invention discloses a washing machine drainage control method and a washing machine. The washing machine comprises a washing barrel and a water pan communicated with a drainage port of the washingbarrel. In the drainage control method, the washing machine controls the drainage process according to the water amount and / or load in the washing barrel, so that water drained out of the washing barrel is always lower than the safe water level of the water pan. According to the drainage control method, the water amount and / or the load in the washing barrel are / is obtained, the opening and closing frequency, the opening time and other drainage parameters of the drainage port in the drainage process are adjusted accordingly, the drained water is prevented from overflowing from the water pan, and the method is simple in logic, easy to implement and suitable for application and popularization.

An intelligent temperature control device for mass concrete is characterized in that an upper branch pipe and a lower branch pipe are arranged on a water segregator pipe at equal intervals, a flange plate is arranged between the upper branch pipe and the lower branch pipe, electromagnetic valves are installed on the flange plate, the branch pipes are welded to the upper branch pipe, and a safety water escape valve is arranged at the tail end of the pipe wall of the water segregator pipe. A water inlet pipe opening and a water outlet pipe opening of each layer of bent circulating water pipe pre-buried in the mass concrete bearing platform are connected with the water inlet pipe and a water inlet of the water pool respectively. A temperature measuring pipe is pre-buried between every two layers of circulating water pipes in the mass concrete bearing platform, and the temperature measuring pipes are filled with liquid medium layers. Temperature sensors pasted to the inner wall of the external environment temperature measuring pipe are inserted into the liquid medium layer, and each temperature sensor is connected with the PLC through a wire.

The invention relates to an open-pit mine water gushing direction identification and treatment method. The method comprises the following steps that S1, hydrogeological survey is carried out; S2, water samples in a wet season and a dry season in the region are correspondingly collected, and clustering analysis based on hydrochemical characteristics is carried out; S3, according to the deduced water gushing source range, a pumping test is carried out; S4, if the hydrogeological parameters have no obvious difference, the water gushing source mixing ratio is calculated through a mixing model, iterative calculation is carried out through data of multiple observation wells, the water gushing direction is judged accordingly, and the treatment range is defined; and S5, water pumping and drainingtreatment is conducted, a river anti-seepage treatment method on one side of the pit gushing direction is adopted, and mining area earth surface water interception and drainage are treated. The methodhas the advantages that the local hydrogeological characteristics and the groundwater seepage field characteristics are effectively combined to timely treat the slope gushing water, the pit gushing water accident is prevented, and the pit safety level and the production efficiency are improved.

The invention discloses a control method of an urban water service pipe network water supply system under external disturbance input. The control method comprises the following steps: step S1, establishing a state space model about the water yield change of the urban water service pipe network water supply system; step S2, designing a state feedback controller about the water yield change of the urban water service pipe network water supply system; step S3, verifying the positivity of the urban water service pipe network water supply system under the state feedback controller; step S4, verifying the progressive stability of the urban water service pipe network water supply system under the state feedback controller; and step S5, computing the weighted L1 gain of the water supply pipe network water supply system. Through the matrix decomposition, the input disturbance control and the weighted L1 gain performance analysis and like technology, the effective control on the safety water supply of the urban water service pipe network water supply system is realized, and the problem that the water supply is unstable and the water supply is insufficient in the water supply process can be effectively solved.

The present invention relates to the technical field of bridge-culvert waterlogging monitoring, and discloses a method for bridge-culvert waterlogging monitoring and alarm according to a vehicle model. The method employs a technology for instantly detecting water level depth under a bridge culvert according to floating of a floating ball on the water surface and the gravity of a metal rod, and comprises the steps that: when there is no water under the bridge culvert, the mass of a small floating ball is larger than the mass of the metal rod, the small floating ball is located at the lowermostend, the metal rod is located at the uppermost end, and a circuit is in a non-electrifying state; when a L1 green light and a L4 green light are on, the water level corresponds to a safety water depth, a small vehicle X and a large vehicle D can safely pass; when a L2 yellow light and a L4 green light are on, passing of the small vehicle X is dangerous, and the passing of the large vehicle D is safe; and when a L2 yellow light and a L5 yellow light are on, passing of the small vehicle X and the large vehicle D is dangerous. The method for bridge-culvert waterlogging monitoring and alarm according to a vehicle model can detect the waterlogging depth under the bridge culvert to allow passing drivers to conveniently understand the bridge-culvert waterlogging condition through light-on of thedisplayed green light, the yellow light and the red light, can determine whether a vehicle can be safely passes or not according to the vehicle model and can timely regulate the route so as to avoid personnel and property loss.

The invention relates to a process device and a method for avoiding combustible liquid storage tank gaseous-phase burning explosion and held pressure damage. The problems that in the prior art, the nitrogen consumption is large, and pumping shrinking is easily caused are mainly solved. According to the process device for avoiding the combustible liquid storage tank gaseous-phase burning explosion and the held pressure damage, gaseous phase space of storage tanks(9) is connected with the top of a buffer tank (1) through pipes, one end of a breather valve (2) is connected with gaseous phase space of the buffer tank (1), an oxygen content detector (4) is arranged on the gaseous phase space of the buffer tank (1), a nitrogen supplementing pipe (5) is connected with the buffer tank (1), an adjusting valve (3) is arranged on the nitrogen supplementing pipe (5), and the upper portion of the buffer tank (1) is connected with a safety water seal (12) through a pipe. By means of the technical scheme, the above problems are better solved, and the process device and the method can be used for avoiding the combustible liquid storage tank gaseous-phase burning explosion.

The invention relates to a combined air vent valve with a buffer device. The combined air vent valve comprises a valve body and a valve deck which is arranged on the upper portion of the valve body and connected with the valve body in a sealing mode. The combined air vent valve is characterized in that the valve body is in an inverted gourd shape and is divided into an upper air exhausting cavity and a lower buffer cavity; a floating ball air exhausting device is arranged in the upper air exhausting cavity, and a floating ball buffer device is arranged in the lower buffer cavity; and a water outlet communicating with the upper air exhausting cavity is formed in the side wall of the valve body, a water inlet is formed in the bottom of the lower buffer cavity, the valve deck is provided with an exhaust port, and the exhaust port is provided with an exhaust hood. Compared with the prior art, the combined air vent valve has the advantages of buffer sewage discharge, safety water hammer preventing, sewage ejection preventing and the like.

The invention relates to the technical field of control, and discloses a start-stop control method and system for a jacking oil pump and an overflow electromagnetic valve. The method comprises the following steps that the instruction type of a start-stop instruction is judged when the start-stop instruction is received; when it is judged that the instruction type is a start instruction, a first delay signal is generated, and a logic and a module are triggered to generate a first pulse signal; the overflow electromagnetic valve is controlled to be powered off after being powered on for a firstpreset duration according to the first pulse signal, and the jacking oil pump is controlled to be started in a delayed mode according to the first delay signal; when it is judged that the instructiontype is a stop instruction, a second delay signal is generated, and a logic and a module are triggered to generate a second pulse signal; the overflow electromagnetic valve is controlled to be poweredoff after being powered on for a second preset duration according to the second pulse signal, and the jacking oil pump is controlled to be stopped in a delayed mode according to the second delay signal so as to ensure that the jacking oil pump and the overflow electromagnetic valve are in a no-load state during start and stop, so that the pressure value in the jacking oil pump is reduced to a safety level, and adverse effects on the system caused by sudden oil pressure rise are prevented.

The invention discloses a culvert device capable of rapidly draining water and preventing flooding. The culvert device comprises two wall faces arranged left and right and a ground shell fixedly connected between the two wall faces, wherein an upper top plate located on the upper side of the ground shell is fixedly connected between the two wall faces, and the upper top plate, the wall surfaces and the ground shell form one driving channel with front and rear openings. The device can automatically detect the water level of a culvert, when the water level reaches the highest limit water level,the device starts a drainage device through a power device, then drainage of water in the culvert is accelerated, and the driving channel is closed, so that flameout caused by the fact that vehicles enter the culvert again is avoided; meanwhile, whether the vehicles are trapped or not can be automatically detected in the driving channel, so that the vehicles are prevented from being trapped, and when the water level reaches the safety water level, the driving channel is opened again; and the device can prevent the vehicles from being trapped when the water level of the culvert is too high, drainage is accelerated, and meanwhile faults caused by re-entry of the vehicles are avoided.

The invention provides a water tank water inlet valve of a float bucket integrated structure. The water tank water inlet valve is composed of a water inlet valve body and a float bucket working device. The float bucket working device comprises an outer float bucket and an inner float bucket, wherein the inner float bucket is of an integral structure, and an inner float bucket body and a swing rod are integrally connected to form the inner float bucket. Positioning lugs are arranged on the two sides of the upper end of the swing rod and connected with a water inlet upper end and serve as supporting points so that upward and downward swinging can be achieved. A rubber mat is arranged at the tail end of the swing rod, and the rubber mat can cover or uncover an air opening through swinging of the swing rod so that the water inlet function and the water stopping function can be achieved. A clamping groove is formed in an annular sleeve of the outer float bucket and connected with a protruding block of a water inlet bucket body in a clamped mode. By means of the water tank water inlet valve, the whole water inlet valve body can be detached, and all parts are cleaned, replaced and maintained. After the water inlet valve body is assembled back, no errors or changes occur at the safety water level of the water inlet valve body, consistency of the safety water level can be ensured, and therefore the safety distance required by the siphon resistance function is ensured. The fault rate of products is lowered. The water tank water inlet valve is easy and convenient to assemble, and production cost is reduced.