240results about How to "Guaranteed water supply" patented technology

The invention provides an intermittent high-rise building external wall automatic fire extinguishing system. The intermittent high-rise building external wall automatic fire extinguishing system comprises a plurality of fire detection devices, a control device, a plurality of fire extinguishing devices and a water supply device. The fire detection devices are distributed on the external wall of a building to form a fire detection network for detecting a fire situation at the outer wall of the intermittent high-rise building and transmitting the obtained information to the control device; the control device is used for acquiring a fire locus position of the intermittent high-rise building external wall according to the fire information of the fire detection devices and automatically controlling the water storage operation of the water supply device and the fire extinguishing operation of the fire extinguishing devices according to the preset procedure; the fire extinguishing devices located on the external wall of the building; each fire extinguishing device comprises a water curtain firefighting spray nozzle and a rain firefighting spray nozzle connected with a firefighting pipe in a controlling mode; the water supply device is connected with each fire extinguishing device through the fire pipe in a controlling mode to supply the water to the fire extinguishing device; the opening and closing of the firefighting pipe are controlled through the control device. According to the intermittent high-rise building external wall automatic fire extinguishing system, the role of effective fire retardance, cooling, isolation and fire fighting is achieved under the situation that the external wall of the building is on fire caused by the fire of some areas of the high-rise building or the external wall of the building is directly on fire, the spread of fire is avoided and the losses are reduced.

The invention discloses a tobacco mulching cultivation method. The nitrogen application rate is 52.5 kg / hm<2>, the ratio of basal fertilizer and top-dressing is 7:3, N:P2O5:K2O is equal to 1:1:3, the basal application materials include 3000 kg / hm<2> of decomposed sesame cake fertilizer, 60 kg / hm<2> of ammonium nitrate, 80 kg / hm<2> of phosphatic fertilizer, 191.4 kg / hm<2> of potassium sulfate, 37.5 kg / hm<2> of zinc sulfate, and 22.5 kg / hm<2> of boric acid, the topdressing materials in the rosette stage include 37 kg / hm<2> of potassium sulfate and 84 kg / hm<2> of potassium nitrate. In the process of transplanting, 15 kg / hm<2> of potassium nitrate is applied in a nest mode, a plastic film is covered, the plastic film is uncovered in the former half period of June, and 7500 kg / hm<2> of wheat straws are covered after earth up until harvest is finished. The tobacco mulching cultivation method is capable of keeping appropriate soil moisture and heat conditions in the growth period of tobacco, enables the tobacco to form a layering and well-developed frame-shaped root system, and is favorable for coordination of water, fertilizer, air and heat of soil.

The invention provides an intelligent water mixing control device, an intelligent water mixing control device method and a water heater. The intelligent water mixing control device comprises a receiving unit, at least one hot-water water inlet, at least one cold-water water inlet, a detection unit and a controller, wherein the receiving unit is used for receiving an input set temperature; the at least one hot-water water inlet is used for providing hot water; the at least one cold-water water inlet is used for providing cold water; the detection unit is used for detecting the temperature of the hot-water water inlet, the temperature of the cold-water water inlet and the temperature of a mixed-water water outlet, and sending the multiple temperatures to the controller; the controller is used for controlling the water supply amounts of the hot-water water inlet and the cold-water water inlet according to the set temperature, the temperature of the hot-water water inlet and the temperature of the cold-water water inlet, so that the temperature of the mixed-water water outlet is equal to the set temperature; the hot-water water inlet, the cold-water water inlet and the mixed-water water outlet are connected in a three-way manner. With the adoption of the technical scheme, the intelligent adjustment of the water supply temperature can be realized; meanwhile, a water returning problem in the process of adjusting the water supply temperature is solved, and water resources and electric power resources are saved.

The invention discloses a nuclear power station conventional island desalted water distribution system full-stop overhauling method. The method comprises the steps that A, ice blockage is carried out on a main pipeline between a conventional island desalted water distribution system and a unit, and an isolating device and a connecting device are additionally arranged at the downstream part of ice blockage; B, a temporary water supply pipeline is connected to the connecting device from an SED, operation verification is carried out on the temporary water supply pipeline, and the temporary water supply pipeline is communicated with the main pipeline between the conventional island desalted water distribution system and the unit through the connecting device after the temporary water supply pipeline is qualified; C, the connecting device is opened to supply water to the unit, and then the isolating device is closed; D, the conventional island desalted water distribution system is made to stop fully, isolating and emptying are carried out, and damaged or aged devices on the main pipeline are replaced; E, a drain valve and a vent valve are opened fully, the system is filled with water, air in the system is exhausted, the system is washed, samples are taken for a laboratory test, and after the samples are qualified, the drain valve is closed, and the conventional island desalted water distribution system is put into operation; F, the connecting device is disconnected with the temporary water supply pipeline, and the connecting device is sealed. The nuclear power station conventional island desalted water distribution system full-stop overhauling method is convenient and rapid to implement, safe and low in cost.

The invention relates to a planting method for breaking a flue-cured tobacco successive cropping obstacle, and belongs to the technical field of flue-cured tobacco cultivation. The method comprises the specific steps of conducting deep ploughing on the soil for planting the flue-cured tobacco, applying a farmyard manure, and then applying a base fertilizer; adopting an integration of water and fertilizer to irrigate tobacco seedlings; applying an enzyme charcoal into a tobacco pond during transplanting time of the flue-cured tobacco; dissolving bacillus amyloliquefaciens FZB42 microbial inoculum through root setting water, and watering the microbial inoculum to the tobacco pond; utilizing PGPR phosphate-dissolving and potassium-dissolving growth-promoting bacteria to prepare a bacterial suspension and fully soaking the root parts of flue-cured tobacco plants in the bacterial suspension before transplanting the flue-cured tobacco, and then transplanting the flue-cured tobacco; conducting field management; spraying flue-cured tobacco tablets on the blades at the upper parts during the topping period of the flue-cured tobacco; spraying an organic state blade surface potash fertilizer after topping. According to the planting method for breaking the flue-cured tobacco successive cropping obstacle, the problems that the structure and the physicochemical property of the soil deteriorate after successive cropping of the tobacco, the root system of the flue-cured tobacco is hypogenetic, the growth and development and nutrient absorption and utilization of the tobacco plants are limited, and the quality of the tobacco is reduced are solved, through the application of the method, obstacle crop failure generated by the successive cropping of the flue-cured tobacco is solved at the maximum, and the purpose that the yield and the quality of the flue-cured tobacco and the fertilizer efficiency are simultaneously improved is achieved.

The invention discloses a portable simple-typed deep drop irrigation method and a portable simple-typed deep drop irrigation device, which belongs to the water-saving irrigation technique. Although the irrigation device of the prior art can resolve the underground drop irrigation problem of the crops in the drought water-shortage area, the structure is complicate and the price is expensive, thereby being difficult to popularize. The invention is to drill holes on the earth near the root of the crop or the tree firstly, and to arrange a water-supply pipe adopting a PE renewable clarinet and being connected with a water accumulation container on the ground, and to use a heated steeple head with a diameter of 2 mm to pass through the wall of the water-supply pipe corresponding to the position of the drill hole to form a connecting hole; after the steeple head is withdrawn, a connector of a medical perfusion tube is inserted into the connecting hole; the other end of the perfusion tube is arranged into the drill hole of the earth after the pin is removed; when opening the water-supply valve, the drop irrigation can be executed. The invention not only overcomes the weakness that the water content on the surface of the earth in the ground irrigation is easy to be evaporated, but also has the advantages of simple equipment, easy material-fetching, less investment, fast efficiency, practicability and easy popularization.

The invention provides a reverse osmosis device for constant pressure water supply, and relates to constant pressure water supply technology. The reverse osmosis device comprises a water supply valve, a booster pump, a reverse osmosis membrane module, pure water tanks, a water tank outlet solenoid valve, a using point, a frequency converter, a motorized valve, a pressure transmitter and a flow meter, wherein the pressure transmitter controls the working frequency of the frequency converter, displays the pressure of the water supply in real time, and controls the working frequency of the frequency converter in a set water pressure value range to keep a constant value of the water supply pressure; and the flow meter controls the openness of the motorized valve in a set flow value range to keep the flow of backflow water in a constant value range. The device has the advantages of achieving constant pressure water supply as well as constant flow of the backflow water to the pure water tank, guaranteeing normal water supply, and reducing electricity consumption.

The invention relates to an urban water-supply system based on big data, and a water-supply method. The water-supply system comprises a water-supply high-pressure tank and a main water-supply pipelineand further comprises a circulating water pipeline and a manhole; a plurality of branch water-supply pipelines are connected to the main water-supply pipeline, water in the water-supply pipes can keep flowing through the circulating water pipeline and a circulating water recycle pool to avoid long-term staying and depositing and water quality deteriorating, the water flow and the water quality are monitored in real time through the manhole, the water flow is convenient to adjust in time, sewage is convenient to treat in time, the water-supply method can deal with various emergencies, and various ways can be adopted to guarantee water supply.

The invention discloses a building rainwater recycling system used for a sponge city. The system comprises a collecting box fixedly mounted at the top of a building and a water storage well arranged on the ground. A supporting column is fixedly mounted on the top surface of the collecting box. Collecting fabric capable of collecting rainwater is fixedly mounted on collecting plates. When a collecting cavity is full of collected rainwater, a floating ball is made to move upwards and upwards drives a push rod to slide upwards, a valve element enables a collecting pipe to communicates with a communicating pipe, water is not collected into the collecting cavity any more, collected water in the collecting cavity overflows outwards through a first overflow pipe, the collecting plates can be propped open when it rains, rainwater collecting is performed, in addition, the collected rainwater is filtered primarily, resource wasting is reduced, when wind on the building is excessively strong, the collecting plates can be controlled to be closed and are prevented from being damaged by the strong wind, the collected rainwater can also be directly introduced into the water storage well, no ground waterlogging is caused, and water supply is guaranteed.

The invention relates to an intelligent drinking water integrating device and system. The device comprises a frequency conversion control cabinet, a main water feeding valve, a front purifying device and an emergency water supplying and secondary pressurizing device, wherein the main water feeding valve is connected with a water inlet of the front purifying device through a pipeline; a water outlet of the front purifying device is connected with the emergency water supplying and secondary pressurizing device through the pipeline; the frequency conversion control cabinet is connected with the front purifying device and the emergency water supplying and secondary pressurizing device; the emergency water supplying and secondary pressurizing device is of three structures. The invention further relates to an intelligent drinking water integrating system. The system comprises the intelligent drinking water integrating device, a property monitoring cabinet, a head office central monitoring cabinet, a server, a user drinking water terminal detecting instrument and a user mobile terminal. With the adoption of the device and system, the quality of municipal water entering the main water feeding valve until reaching the consumption end of the user as well as the device operation condition can be monitored on real time, so that the water quality, safety and normal water supply of the device can be ensured; the acquired water quality information can be sent to the user, and thus the user can conveniently know the state of drinking water.

The invention relates to a fire hydrant monitoring system, comprising a signal acquisition unit and a signal transmission unit, wherein the signal acquisition unit is used for acquiring information of each fire hydrant in real time; the signal transmission unit is connected with the signal acquisition unit; the signal transmission unit and a control unit exchange data; the control unit analyzes and processes signals input by the signal transmission unit and then outputs the signals to a warning unit; the warning unit reminds maintainers to maintain and protect the fire hydrants. According to the scheme, the fire hydrants can be remotely monitored in real time, a warning signal can be timely transmitted to a main monitoring unit and inspectors to maintain and protect the fire hydrant when the fire hydrant is damaged, loses efficacy or is unstable in water pressure, and the fire hydrants can normally run.

The invention discloses an explosion-proof ventilation device for underground engineering. The explosion-proof ventilation device for the underground engineering comprises a ventilation pipe and a fanmounted inside the ventilation pipe, the inner wall of the ventilation pipe is fixedly provided with an adjustment device for adjusting the rotation speed of the fan, a treatment box is fixed on theinner wall of the ventilation pipe, the side wall of the treatment box is provided with a ventilation groove in a penetrating mode, an L-shaped connecting rod is fixed on the inner wall of the ventilation groove, a rotating shaft is rotationally connected to the side wall of the connecting rod, and a plurality of rotating plates are fixed to the circumferential side wall of the rotating shaft. Theexplosion-proof ventilation device has the advantages that when the concentration of mashgas of an underground passage is relatively high, and air input by an air outlet pipe is not enough to reducethe concentration of the mashgas, a detector can emit an acousto-optic alarm, the emitted sound can be used for prompting a worker for prevention, the emitted flash can reduce the value of resistanceof a photoresistor, so that the attraction force of an electromagnet to an electricity connecting piece is increased, then the rotation speed of the fan is reduced, the air suction amount per unit time is reduced, then the concentration of the mashgas in the ventilation pipe is reduced, and explosion is avoided.

The invention belongs to the technical field of fertilizers and discloses a liquid fertilizer special for Dahlia pinnata, made from, by weight, 15-50 parts of monopotassium phosphate, 10-30 parts of potassium sulfate, 5-30 parts of calcium nitrate, 1-10 parts of citric acid, 5-45 parts of Maifan stone extract, 3-10 parts of a growth regulator, 3-10 parts of plant extract, 10-24 parts of a wetting agent, and 1000-3500 parts of water. The invention also discloses a manufacture method of the liquid fertilizer special for Dahlia pinnata, comprising the sequential steps of mixing well raw materials, and adding citric acid to adjust pH of the solution to 5.5-7. The liquid fertilizer according to the invention is prepared specially in accordance with the growth features of Dahlia pinnata, the liquid fertilizer has complete nutrition, the fertilizer utilization rate of Dahlia pinnata is increased effectively, and absorption by Dahlia pinnata, promotion of adult-plant blossoming, sterilization and disinfecting, lodging resistance and healthy growth are facilitated.

The invention discloses a high-altitude dry-farmed horsebean cultivation method, which relates to an all-film double-ridge furrow drilling technique applied to dry farming areas at the altitude of 2000m to 2500m and belongs to the technical field of horsebean cultivation. The high-altitude dry-farmed horsebean cultivation method which is a horsebean cultivation technique is characterized in that from mid-to-late October to the days before soil freezes up or in the early spring of the next year, an all-film double-ridge furrow drill is adopted to cover the whole ground with films, and after germination is accelerated, horsebean seeds are sowed into the soil under the temperature of 2 DEG C to 8 DEG C; and in the mid-to-late April of the next year, according to the planting depth of 5cm to 6cm and the plant spacing of 18cm to 23cm, seedlings are planted in the middle lower parts of the sunny sides of small and large ridges. The high-altitude dry-farmed horsebean cultivation method has the advantages that the large and small ridges are completely covered by the mulching films, so that moisture supply is guaranteed in the growth period of horsebeans; the ground temperature is increased, the effective accumulated temperature is increased, the growth period of horsebeans is prolonged, the potential of horsebean production can be exerted, and the maturity of horsebeans is guaranteed; and moreover, the economic benefit is remarkable.

The invention relates to a frequency-conversion-type automatic constant-pressure water supplying system and method, and belongs to the technical field of automatic control. The frequency-conversion-type automatic constant-pressure water supplying system comprises a PLC, a frequency converter, a liquid level sensor, an analog quantity output module, a pressure sensor, a contactor switching circuit, a water pump, a motor and a manual control module. The analog quantity output module, the frequency converter and the manual control module are connected with the PLC, output signals detected through the liquid level sensor are connected with the analog quantity output module, output signals detected through the pressure sensor are connected with the analog quantity output module and a PID module of the frequency converter, the PLC and the PID module of the frequency converter are connected to the contactor switching circuit, the contactor switching circuit is connected with the motor, and the motor drives the water pump to run to supply water. By means of the frequency-conversion-type automatic constant-pressure water supplying system and method, the problems that water pressure is insufficient in the resident water peak period, and water pressure in the trough period is overlarge are solved; constant-pressure water supplying is achieved, resources are fully used accordingly, and the energy saving aim and the environment-friendly aim are achieved.

The invention discloses an efficient ecological restoration method for a slope in South China. The efficient ecological restoration method comprises the following steps that the bare slope face is cleaned, a net is fixed to the slope face, and a planting matrix or covering soil is sprayed; thysanolaena maxima spikelets and caryopsises are selected; then white tephrosia seeds are selected and processed; bacteria-removed sawdust is soaked in water, thereby fully absorbing water, then the bacteria-removed sawdust is dredged out, the bacteria-removed sawdust, the thysanolaena maxima spikelets and caryopsises and bermuda grass seeds are mixed evenly, and standing is conducted; and the bacteria-removed sawdust and the bermuda grass seeds mixed with the thysanolaena maxima spikelets and caryopsises, the white tephrosia seeds, fertilizer and water are evenly mixed and stirred to be made into spray-seeding materials, the spray-seeding materials are sprayed through a spray-seeding machine or are sown manually onto mud of the slope face, the slope face is covered with nonwovens, and maintenance is conducted. The efficient ecological restoration method has the characteristics that vegetation of the slope can be obtained fast, ecological restoration is fast, water and soil loss can be prevented effectively, the vegetation succession process can be facilitated, and harmonious and sustainable development of road slope virescence and surroundings is achieved.

The invention discloses a method for planting seedlings and afforesting in a sand land of an arid region by using sand land shrub mulberry bare-root seedlings. The method comprises the following steps: (1) digging a motor-pumped well and determining an afforesting land; mounting and laying a trickle irrigation facility; (2) preparing nursery stocks before field planting; (3) determining field planting time; (4) preparing a water source before afforesting; (4) carrying out field planting on the nursery stocks; (6) carrying out root promotion measures after planting; (7) carrying out recovering management; and (8) carrying out conventional management. The invention provides a special nursery stock planting device for the method. According to the method for planting the seedlings and afforesting in the sand land of the arid region by using the sand land shrub mulberry bare-root seedlings and the special nursery stock planting device for the method, the time limitation of conventional afforesting is broken through and planting work of one seedling can be finished within seconds; the current-year survival rate of afforesting is up to 95% and the preserving rate of the next year is up to 85%; an afforesting procedure is optimized and an afforesting step is simplified, so that a seedling planting and afforesting process of the sand land shrub mulberry bare-root seedlings is simplified, the afforesting cost is saved; the recovering period is shortened, the survival rate and preserving rate of the nursery stocks are improved and the afforesting effect is relatively good.

The present invention discloses a double-pipe type solar water-heater. Its waterway is divided into upper and lower two water pipes, on the upper water pipe a water-supplying electromagnetic valve and a temperature-measuring probe are mounted, the electroheater in the water tank is controlled by temperature control regulation instrument, on the lower water pipe are successively mounted a pipe electroheater, booster pump and hot water valve, between upper water pipe and lower water pipe a circulation pipeline is connected so as to form a loop, the circulation electromagnetic valve is mounted on the circulation pipeline. Its electric circuit portion includes temperature-measuring probe, temperature sensor, temperature control regulation instrument, level sensor, electromagnetic valve, booster pump and automatic control instrument, etc. Besides, said invention also provides its working principle and its concrete operation method.

The invention relates to a method for secondarily recycling smoke gas waste heat of a continuous annealing furnace, belonging to the technical field of a band steel continuous annealing furnace, and being expansively applied to the smoke gas waste heat recovery in other fields. The method for secondarily recycling smoke gas waste heat of a continuous annealing furnace is characterized by the following step: performing heat exchange between the low temperature smoke gas generated after primarily recycling the smoke gas waste heat of the continuous annealing furnace and the cooling return waterafter the water cooling roller of the annealing furnace is cooled through a heat exchanger of a secondary recycling system, wherein the cooling return water passes through the heat exchanger for heatexchange and then is heated and sent to a cleaning section for use. The method not only saves heat energy but also saves a large quantity of cooling water in the cleaning section, and simultaneously reduces operation cost.

The invention discloses a coastal mud flat asparagus seedling cultivation and planting method. The method particularly comprises the steps of (a) germination acceleration, wherein from February to April that year, asparagus seeds are soaked in warm water and then taken out, germination acceleration is carried out on the seeds for 5-7 days, and the seeds can be sown when the sprouts of 10%-20% of the seeds come out; (b) seedling cultivation in a feeding block, wherein the seeds subjected to germination acceleration are sown in the feeding block mixed with salt-tolerant water-retaining agents, and after the seedlings grow to be as high as 30-40 cm and 3-4 branches grow from each seedling, the seedlings can be planted; (c) rest-balk making and planting, wherein a flat field with the salinity-alkalinity lower than 0.7% is selected and is deeply ploughed for 30 cm, organic fertilizer is applied, rest-balks are made after rotary tillage, the width of each rest-balk is 80 cm, the height of each rest-balk is 30 cm, the intervals between the rest balks are 60 cm, each rest-balk includes one row, the depth of each cave is 15 cm, the plant row spacing is 25 cm, and 0.2 g of salt-tolerant water-retaining agents are evenly scattered in each cave; and (d) regular management on the planted asparagus. The coastal mud flat asparagus seedling cultivation and planting method can reduce stress on the seedlings from salt and alkali and improve the survival rate of the asparagus, rainwater can be repeatedly stored by the water-retaining agents to be used by plants, growth needs of the asparagus are guaranteed, and the problems that the root systems of the asparagus seedlings are weak, and the survival rate of the asparagus seedlings in a coastal mud flat is low are resolved.

The invention discloses a tree planting survival device applicable to a cold floor drain structure in drought years. The tree planting survival device comprises a barrel body, a cover plate, a separating plate, a water seeping hole, pores, an osmosis membrane, a water inlet pipe, a heating system, a humidity sensor, a heating ring and a heating tube, wherein overall of the barrel body is in an inverted circular truncated cone shape or an inverted square table shape, the separating plate is transversely arranged at the middle part of the barrel body, the cover plate is arranged at the top of the barrel body, a round hole is formed in the middle of the cover plate, water seepage holes are distributed in the separating plate in an array, the osmosis membrane covers the water seepage holes, the heating ring is paved above the osmosis membrane, two pores with the same size are formed at corresponding positions of the cover plate and the separating plate respectively, and the water inlet pipe and the heating system pass through the pores to be contacted with the bottom of the barrel body. The tree planting survival device provided by the invention can provide a high-quality and stable growth environment for tree seedlings and reduce waste of water resource, can adapt to a harsher environment and has high application value.

The invention provides a hot water cleaning machine structure. The hot water cleaning machine structure comprises a high-pressure pump used for pressurizing water, and a burner used for heating the water, wherein the high-pressure pump is provided with a water inlet and a water outlet, the burner is provided with a burning chamber and a heat exchange coil pipe, and the water outlet of the high-pressure pump is communicated with the heat exchange coil pipe. According to the hot water cleaning machine structure, by a way of arranging the burning chamber, the high-pressure water can be heated so as to improve the cleaning effect. Meanwhile, by adopting the burning chamber, the requirement on long-time supply of hot water can be satisfied, the amount of the water supply is ensured, and the working efficiency is improved. The invention discloses the high-pressure hot water cleaning machine structure which is reasonable in structure and can make up for the deficiency in cleaning of a high-pressure cold water cleaning machine. Therefore, the high-pressure hot water cleaning machine structure has certain market at high latitudes, and in heavy oil contamination industry, food industry and chemical industry.

The invention relates to a vertical multi-stage centrifugal pump which comprises a pump body, a motor, a cable and a base. The pump body and the motor are arranged on the base, the centrifugal pump further comprises a pump bowl, and the interior of the pump bowl is divided into an upper cavity and a lower cavity, wherein the upper cavity and the lower cavity are arranged up and down and communicated with each other. The pump body is arranged in the upper cavity, the motor is arranged in the lower cavity in a sealed mode, a water inlet is horizontally formed in the lower end of the lower cavity in the radial direction, the water outlet is communicated with the upper cavity through a fastening bolt, and the water outlet can be located in the lower end of the upper cavity in multiple horizontal directions. The centrifugal pump can avoid leakage caused by mechanical seal abrasion, water flowing in the centrifugal pump can cool the motor, the direction of the water outlet can be adjusted, and installation is convenient and quick. The invention further relates to a constant-pressure water supply unit which comprises a frequency converter and the vertical multi-stage centrifugal pump, the frequency converter is connected with the vertical multi-stage centrifugal pump in a sealed mode, and water flowing in the centrifugal pump can also cool the frequency converter.

The invention discloses an organic fertilizer for improving the heat resistance and the lodging resistance of rice, wherein the organic fertilizer is prepared from the following raw materials by weight: 40-45 parts of active sludge, 13-16 parts of banana peel, 6-8 parts of maifanite powder, 2-3 parts of oxalic acid powder, 2-3 parts of potassium citrate, 3-4 parts of sodium hexametaphosphate, 4-6 parts of calcium phosphate, 41-43 parts of rice straws, 24-28 parts of cinnamomum camphora leaves, 13-16 parts of a 30% hydrogen peroxide solution, 0.9-1.1 parts of tetradecyl trimethyl ammonium chloride, a proper amount of a 5 mol / L sodium hydroxide solution, a proper amount of a 45% ethanol aqueous solution, and a proper amount of water. According to the present invention, the fertilizer has the scientific nutrient ratio; the nitrogen consumption is controlled, the phosphorus content and the potassium content are increased, and the addition of calcium and mineral nutrients is matched, such that the toughness of the rice stem is enhanced, and the breaking resistance of the stem base internode is improved; and with the use of the active sludge, the banana peel and other composted fermentation materials, the soil fertilizer storage space can be expanded, the expansion development of the rice root can be promoted, and the land-gripping ability of the rice is increased so as to enhance the lodging resistance of the rice.

The invention discloses a method for promoting early cultivation of multi-layer film covering of winter and spring in asparagus in greenhouse. The method comprises the following steps: (1) plot selection and base planning, (2) variety selection, (3) seedling raising, (4) field planting, (5) field management, (6) harvesting, and (7) multi-layer plastic film covering for early cultivation. The cultivation method breaks the long-term natural dormancy state of the asparagus in the winter and spring low temperature conditions, which leads to no asparagus harvesting of the cultivation of asparagus in southern China's greenhouses from the end of November to the end of February. The method for promoting early cultivation of multi-layer film covering greatly improves the planting efficiency of theasparagus. Compared with the existing open field and greenhouse cultivation, the harvesting period of asparagus is obviously early and the production and economic benefits of asparagus have been significantly improved.

The invention discloses a water supply system and a water supply scheme of a water-turbine generator set in a heavy sediment-carrying river. The water supply system achieves switch of multiple water supply schemes through a combination of a four-way valve and a three-way valve; one of the water supply schemes is selected according to external conditions, normal operation of the water-turbine generator set on any conditions is guaranteed, and purposes of safety and saving energy are achieved. Meanwhile, water supply directions can be switched by the four-way valve, the purpose of water supply in forward and reverse is achieved, silt depositing in pipelines and blocking the pipelines are avoided, and the cooling effect of the water-turbine generator set is improved. The water supply system and the water supply scheme of a water-turbine generator set in the heavy sediment-carrying river has the advantages that not only technical water supply schemes can be switched flexibly according to water quality situation of the water source, but also the water supply is safe, reliable and energy-saving and the like.

The invention discloses an intelligent pipe network pressure-superposed non-negative pressure variable frequency water supply device. The intelligent pipe network pressure-superposed non-negative pressure variable frequency water supply device is mainly composed of a flow stabilization compensator, a negative pressure eliminator, a water shortage signal transmitter, a water level sensor, an air compensation tank, a water pump and a control cabinet; two parts including a flow stabilization cavity and a high-pressure energy storage cavity are integrated to the flow stabilization compensator; the air compensation tank is arranged on the outer side of the high-pressure energy storage cavity and is installed on the flow stabilization compensator fixedly; a connecting pipe is arranged at the bottom of the air compensation tank to be communicated with a small flow pipe; and a water inlet solenoid valve is installed on the connecting pipe. The intelligent pipe network pressure-superposed non-negative pressure variable frequency water supply device has the beneficial effects that the flow stabilization compensator is of dual-cavity integration structure including the flow stabilization cavity and the high-pressure energy storage cavity, the structure is compact, and the occupied land is small; in addition, energy saving can be achieved through the pressure of a tap water inlet pipe; normal water supplying can be guaranteed during small flow pump stopping of the high-pressure energy storage cavity, so that the pump stopping energy saving effect is achieved; meanwhile, the service life is prolonged; after the high-pressure energy storage cavity deflates, automatic air compensation can be achieved; and the intelligent pipe network pressure-superposed non-negative pressure variable frequency water supply device is convenient to use.

The invention discloses an organic fertilizer capable of improving the water retention capacity of soil and the heat resistance of plants. The organic fertilizer is prepared from, by weight, 35-36 parts of peanut meal, 19-21 parts of livestock and poultry feathers, 3-5 parts of perlite powder, 2-3 parts of edta ferric sodium salt, 1-2 parts of potassium selenite, 6-8 parts of urea, 3-4 parts of carboxymethylcellulose, 42-45 parts of rice straw, 31-33 parts of cinnamomum camphora leaves, 13-16 parts of a hydrogen peroxide solution with the concentration of 30%, 1.1-1.4 parts of trimethyl tetradecyl ammonium chloride, an appropriate amount of a sodium hydroxide solution with the concentration of 5 mol / L, an appropriate amount of an ethanol water solution with the concentration of 45% and an appropriate amount of water. The fertilizer has the comprehensive nutritional ingredients; by adding organic matter, a significant effect on improvement of a soil structure and especially increasement of the porosity degree is achieved; by using the water retention materials such as the perlite powder and carboxymethylcellulose, the rain retention capacity and the water retention capacity of soil plough horizon can be improved, the water requirement of irrigation can be significantly lowered, and the additional value of fertilizer usage and the economic benefit are increased.

The invention discloses a municipal protective fence. The municipal protective fence comprises a plurality of fence units which are connected with one another and is characterized in that each fence unit comprises a transverse rack, a through pipe and standing columns with water storage cavities, the transverse rack and the through pipe are fixed between the two standing columns, the inner cavityof the through pipe is communicated with the water storage cavities, the through pipe is provided with a water collecting mechanism communicated with the inner cavity of the through pipe, a cultivation container is fixed to the transverse rack, and water guide pipes with water guide ropes inside are connected between the cultivation containers and the water storage cavities. The municipal protective fence has the advantages that protection and isolation can be achieved while greening can be achieved, and sufficient water supply can be kept automatically.

The invention relates to a solar photovoltaic thermal / electric heat tracing system for a permafrost-buried pipe. The solar photovoltaic thermal / electric heat tracing system has the characteristics as follows: (1) a heat-storing and heat-tracing resistance wire is electrified and heated by a solar photovoltaic conversion system on a permafrost-buried part of a fluid pipeline on a user side so as to achieve all-weather heat tracing fluid supply; (2) the solar photovoltaic thermal / electric heat tracing system is used for heat tracing protection on a trunk pipeline buried into a permafrost layer so as to prevent the fluid trunk pipeline from freezing (coagulating); (3) a heat-insulating layer made of a phase change heat storage material is wrapped around the permafrost-buried part of the fluid pipeline on the user side, and through electrification-caused thermal storage in the daytime and coagulation-caused heat release at night, heat storage and delayed heat release are achieved; (4) storing remaining electricity of the solar photovoltaic conversion system in a storage battery, and controlling a circuit by a temperature control system according to the real-time temperature around the pipeline so as to achieve intermittent power supply heat tracing, thereby saving energy. The solar photovoltaic thermal / electric heat tracing system has the characteristics of simple and flexible structure, energy conservation, environmental friendliness and the like; without using an additional power supply and power equipment, the investment, maintenance and operating costs can be greatly reduced.