782results about How to "Improve drainage efficiency" patented technology

The invention relates to a tunnel ponding early warning method and device, computer equipment and a storage medium. The method comprises the steps that at least two first flow detection units are arranged at an inlet and an outlet of a tunnel, at least one second flow detection unit is arranged at a water outlet of the tunnel, local water accumulation threshold values of a plurality of water accumulation sensitive areas are determined based on historical water accumulation data, and the local water accumulation threshold values are arranged according to the threshold values to obtain a threshold value distribution sequence; dividing the threshold distribution sequence into a first sequence and a second sequence based on a preset proportion, and determining a first global threshold by a local ponding threshold at the boundary of the first sequence and the second sequence; calculating the inlet and outlet flow difference according to the first flow data and the second flow data, and further determining the water accumulation amount; and adjusting a second global threshold value according to the ponding risk index, and starting a corresponding risk early warning strategy when the ponding amount exceeds the first global threshold value or the second global threshold value. Low-cost and high-precision tunnel ponding monitoring is realized based on simplified sensing data, and the safety of tunnel passage is improved.

The invention belongs to the technical field of medical instruments, and discloses a dynamic pressure adjusting thoracic surgery anti-blocking drainage system which comprises a drainage tube, a drainage bag, a backflow tube, a positioning disc, an electric rotating disc, a blade, an electric vacuum pump and a monitoring mechanism. A drainage tube and a return tube are arranged on the special-shaped tee joint; the tail end of the return pipe is connected with the input end of the electric vacuum pump; the output end of the electric vacuum pump communicates with the drainage bag; a protective shell is arranged on the positioning disc; an electric turntable is arranged on the protective shell, a plurality of blades are arranged at the tail end of a movable rod of the multi-stage medical electric push rod, and a monitoring mechanism is arranged on the protective shell. The internal pressure of the thoracic cavity is monitored in real time, the drainage process is accurately controlled in combination with other physical sign data, and the proper pressure of the thoracic cavity is maintained to improve drainage efficiency; a real-time monitoring and abnormity identification function can timely perceive drainage abnormity; normal saline flushing and mechanical crushing are combined, so that the drainage tube is smooth; the drainage process is comprehensively evaluated in combination with various monitoring data, and potential risks are found as early as possible.

The invention discloses a hoisting type purification total heat exchanger capable of achieving rapid dehumidification, and belongs to the field of total heat exchangers, the hoisting type purification total heat exchanger comprises a box body, a first air inlet cover and a second air outlet cover are installed at the left end of the box body, a second air inlet cover and a first air outlet cover are installed at the right end of the box body, and a heat exchange core body is installed in the box body; a first draught fan is installed at the position, close to the second air inlet cover, in the box body, and a second draught fan is installed at the position, close to the second exhaust cover, in the box body. Water drops can be ensured to be rapidly and comprehensively removed through left-right movement of the water scraping strip, the water drops are guided by the first liquid guide groove to flow and finally collected in the first water receiving box and the second water receiving box, the drainage efficiency is improved, it is ensured that water in the box body can be drained in time, and the service life of the water scraping strip is prolonged. And the problem of bacterium breeding possibly caused by too high humidity is effectively avoided, so that the cleanness and sanitation of the environment in the box body are maintained, and the service life of the equipment is also prolonged.

The invention discloses a heat preservation integrated assembly type roof structure and a construction method thereof, and relates to the technical field of building roof structures, the heat preservation integrated assembly type roof structure comprises a supporting frame, a heat preservation layer, a waterproof layer and a concrete protection layer, the supporting frame is fixed to a building main body structure, and the heat preservation layer comprises a plurality of roof panels which are spliced with one another; the roof panel is made of high-strength lightweight concrete, a heat preservation plate is embedded in the roof panel, a fixing structure used for fixing the roof panel is arranged on the supporting frame, the waterproof layer is laid on the heat preservation layer and covers the whole heat preservation layer, and the concrete protection layer is laid on the waterproof layer and covers the whole heat preservation layer. And a gap between the supporting frame and the building main body structure is sealed. The method has the advantages that efficient assembly construction can be achieved, the construction period is remarkably shortened, the field operation amount is reduced, and the construction efficiency is improved.

The invention relates to the technical field of conductive corrosion-resistant coatings for metal bipolar plates of hydrogen fuel cells, and discloses a conductive corrosion-resistant silver-doped titanium nitride coating for a metal bipolar plate as well as preparation and application of the conductive corrosion-resistant silver-doped titanium nitride coating. The conductive corrosion-resistant silver-doped titanium nitride coating for the metal bipolar plate is formed by sequentially stacking a pure Ti transition layer, a silver-doped titanium nitride coating and a pure titanium nitride covering layer. According to the conductive corrosion-resistant silver-doped titanium nitride coating for the metal bipolar plate, silver can be stably and uniformly distributed in the titanium nitride coating, a conductive path is formed, the contact resistance of the coating is reduced, the titanium nitride coating forms a compact structure, the corrosion resistance and the surface hydrophobicity of the titanium nitride coating are enhanced, and the service life of the coating is prolonged. The surface contact resistance can reach 4.18 m omega.cm < 2 >, the corrosion current density can reach 0.59 mu A.cm < 2 >, the corrosion potential can reach 0.08 V, and the water contact angle can reach 106.70 degrees.

The invention discloses a drainage device for foundation pit construction site construction, and particularly relates to the field of foundation pit construction site construction, the drainage device comprises a high-pressure water pump, the input end of the high-pressure water pump is connected with a connecting pipe, one end of the connecting pipe is connected with a water pumping pipe, the top of the water pumping pipe is provided with a floating plate, and the bottom of the water pumping pipe is fixedly connected with a connecting branch pipe. According to the device, firstly, the water pumping pipe and the connecting plate can descend along with descending of the water level through the arranged floating plate, when water pumping is started, the water pumping end can suspend in water, bottom silt is prevented from being directly pumped away, the blocking time of the porous frame and the filtering cover is shortened, liquid in a foundation pit can be rapidly pumped away, and the water pumping efficiency is improved; meanwhile, in the water pumping process, the scraping frame can scrape impurities on the surfaces of the porous frame and the filtering cover while the connecting plate rotates at the bottom of the water pumping pipe through the automatic cleaning mechanism, the filtering and drainage effects are improved, the dredging frequency is reduced, the project progress is not affected, and the drainage efficiency is improved.

The invention relates to the related technical field of marine air conditioners, and discloses a marine assembled air conditioning device which comprises a ventilation output mechanism, a combined outer rack and an optimized compressor, and a middle output pump set and a condenser shell are fixedly mounted on the top wall of the combined outer rack; a butt joint supporting platform is arranged at the top of the middle output pump set, and the optimized compressor is fixedly installed on the top of the middle output pump set. The ventilation output mechanism comprises a main machine shell. According to the marine assembled air conditioner device, the convenient overhauling mechanism is arranged at the bottom of the main machine shell, and an overhauling opening in an overhauling cover plate of the convenient overhauling mechanism and an overhauling sealing plate on the lower side are arranged; the maintenance sealing plate does not need to be placed in a position finding mode after being disassembled, the reassembling efficiency after maintenance is improved, and therefore the maintenance efficiency is improved.

The invention discloses a layered drainage system for a muck slope, and relates to the field of muck slope drainage, the layered drainage system for the muck slope comprises a drainage channel, a surface drainage structure and an underground drainage structure, the drainage channel is arranged at the slope bottom, and the bottom of the drainage channel goes deep into a clay landfill layer; the surface drainage structure is arranged on the sand landfill layer and comprises an intercepting ditch, a plurality of drainage ditches and a plurality of inspection footpaths, the intercepting ditch is arranged on the slope top and communicated with the drainage ditches, the drainage ditches and the inspection footpaths are arranged on the slope surface and are in a step shape, the drainage ditches are distributed at intervals, and the inspection footpaths are communicated with the drainage ditches. An inspection footpath comprising a footpath main body and a plurality of catchment channels is arranged between any two adjacent drainage ditches, and the catchment channels are arranged on the lower side of the footpath main body and communicated with the drainage ditches; the underground drainage structure comprises a plurality of water collecting wells and a plurality of underground water pipelines which are arranged on the sand landfill layer, the water collecting wells correspond to part of the drainage ditches and are connected through the underground water pipelines, and one underground water pipeline is communicated with the drainage channel; therefore, ground surface and underground drainage can be achieved simultaneously, and drainage efficiency is improved.

The invention relates to the technical field of assembly type houses, and particularly discloses a modular assembly type steel structure house which comprises a bottom frame module, side frame modules, a top frame module and a roof module. The bottom frame module is divided into the bottom plates with the small size, transportation is convenient, the number of the bottom plates can be selected according to the size of a house during assembly, and the assembly flexibility is improved; the lower positioning columns of the side frame modules penetrate through the movable clamping positions of the bottom frame modules to movably limit the peripheries of the bottom frame modules, the assembly stability of the bottom frame modules is improved, and the heat preservation, sound insulation and decoration functions of the house are guaranteed through the layered design of the splicing wall bodies from outside to inside; the top frame module and the bottom frame module are matched to position the upper positioning columns and the lower positioning columns of the side frames to form a house frame structure, and the stability of the house frame is improved through clamping and limiting of the adjacent modules. The functional frame is matched with the upper positioning column and is in bolted connection, so that the connection stability with the positioning side frame is guaranteed.

The utility model belongs to the technical field of mine restoration, and particularly relates to an outer flood interception ditch structure for mine restoration and treatment engineering, which comprises a ditch body, the ditch body comprises a ditch bottom, a first ditch wall and a second ditch wall, the first ditch wall is arranged at one end of the ditch bottom close to a mine closure field, and the second ditch wall is arranged at one end of the ditch bottom far away from the mine closure field; the slope surface, close to the upstream side, of the ditch body is a fresh bedrock surface; the ditch bottom and the first ditch wall are both of a reinforced concrete structure, and the second ditch wall is of a water permeable brick masonry structure. The slope surface, close to the upstream side, of the ditch body is excavated to the fresh bedrock surface, and the long-term stability and safety of the ditch body are ensured by utilizing the characteristics that the fresh bedrock surface is not affected by weathering and has higher strength and stability; the ditch bottom and the first ditch wall of the ditch body are of a reinforced concrete structure, the second ditch wall is of a permeable brick masonry structure, the stability and durability of the ditch body are guaranteed, meanwhile, slope surface flowing water can be smoothly drained into the ditch body through the second ditch wall, and water accumulation is effectively prevented.

The utility model relates to the technical field of medical equipment, and discloses a chest drainage device for thoracic surgery, which comprises a drainage bottle, a drainage tube and a fixed needle. A drainage bottle, a drainage tube, a fixed needle head, a cleaning tube, a valve, a connector, a cleaning needle, a plugging device and the like are arranged and used in cooperation, when the drainage tube is blocked, the needle head of the cleaning needle is connected with the connector, then the valve is opened, the cleaning needle is used for injecting dissolving liquid into the drainage tube through the connector, the valve and the cleaning tube, blocked blood clots and pus are dissolved, and the blood clots and the pus are cleaned. Then sucking and cleaning blockages are carried out, smooth circulation of the drainage tube is guaranteed, meanwhile, the plugging device is started to plug one end close to the fixed needle head, the cleaning needle is prevented from influencing a patient when sucking the blockages in the drainage tube, then the valve is closed, the plugging device is started, and the drainage tube can continue to smoothly complete drainage work of the patient; operation is simple and convenient, and drainage efficiency is improved.

The invention relates to a water level detection method and device for a drainage pipe network, electronic equipment and a storage medium, and the method comprises the steps: obtaining the water level data of a plurality of preset detection points in the drainage pipe network of a target city; obtaining current environment data of the target city, design parameters of the drainage pipe network and current drainage operation parameters, and calculating a theoretical water level of the drainage pipe network based on the current environment data of the target city, the design parameters of the drainage pipe network and the current drainage operation parameters; and screening out at least one preset detection point meeting a preset detection condition from the plurality of preset detection points based on the theoretical water level, so as to obtain the actual water level of the drainage pipe network based on the water level data of the at least one preset detection point. Therefore, the technical problem that the urban drainage efficiency is affected due to the fact that the water level data of the urban drainage pipe network is difficult to accurately obtain due to the influence of the design structure of the liquid level meter in the related technology is solved.

The invention relates to the technical field of crissum flushing, in particular to a pressing type crissum flushing device. The device comprises a supporting frame, a buffering cushion is slidably arranged at the top of the supporting frame, a flushing frame is arranged at the bottom of the supporting frame in a communicating mode, a spray head is embedded in the flushing frame, a flushing assembly is arranged at the bottom of the flushing frame, and the flushing assembly is used for preventing cleaning liquid from flowing out when the buffering cushion slides downwards. A guiding assembly is arranged in the connecting frame and used for guiding flushing fluid in an inclined mode when the water outlet pipe and the water outlet coincide and communicate for drainage. Through the design of the flushing assembly, when a patient sits on a buffer cushion, a supporting sliding frame can automatically slide downwards, so that a water outlet pipe and a water outlet are staggered, flushing liquid is effectively prevented from flowing out, the problem that waste water overflows to wet shoes and socks of the patient is solved, the body burden of the patient is greatly relieved, and more comfortable use experience is provided for the patient.

The invention discloses an anti-settlement subgrade layered filling structure and a construction method, the anti-settlement subgrade layered filling structure comprises soft rock filler layers, a silty sand layer is filled every other soft rock filler layer with a fixed thickness, and a composite geomembrane is laid on the silty sand layer; the composite geomembrane sequentially comprises a curing layer and a drainage layer from bottom to top, the curing layer comprises a plurality of reinforcing units distributed in an array mode, each reinforcing unit comprises an upper layer and a lower layer which are filled with urease and cementing liquid respectively, the urease and the cementing liquid are sealed through the geomembrane, a trigger device is arranged in the upper layer, and the drainage layer is arranged in the lower layer. When the roadbed is settled, the trigger device moves downwards along with the roadbed to solidify the settled part; the drainage layer comprises a capillary drainage structure and is used for transversely guiding water out to the side slope. All the structural layers are matched with one another, outside water is prevented from entering a soft rock filling layer, meanwhile, the drainage capacity of the soft rock roadbed is greatly improved, the disintegration and softening effects of rainwater on soft rock are reduced, the service life of the soft rock roadbed is prolonged, the long-term stability of the roadbed is improved, and applicability is high.

The invention provides a saline-alkali soil salt elimination system and method based on straw formation, and belongs to the technical field of soil drainage and saline-alkali soil treatment. The system comprises a straw drainage body buried in the saline-alkali soil, a water collecting well buried in the saline-alkali soil and a drainage ditch formed by digging in the surface of the saline-alkali soil. The straw drainage body is communicated with the water collecting well, and a water pumping mechanism is arranged in the water collecting well and used for draining saline-alkaline water collected in the water collecting well into the drainage ditch; the method comprises the steps of S1, land leveling; s2, determining layout parameters and a scheme; s3, processing and manufacturing a straw drainage body; s4, mounting: digging a drainage ditch at a design position, laying a straw drainage body and mounting a water collecting well; s5, slope protection treatment of the drainage ditch slope; s6, crop planting; s7, soil salt leaching; s8, discharging water and salt; according to the method, the straw drainage body and the straw grass blanket slope protection are constructed by using the straw, the method is ecological and environment-friendly, the drainage and slope fixation effects are good, and favorable conditions are provided for saline-alkali soil treatment.

The embodiment of the invention provides an incentive scheme determination method and device based on causal inference, equipment and a medium, and belongs to the technical field of artificial intelligence. The method comprises the steps of obtaining customer basic information, historical incentive data and corresponding historical interactive behavior data of a target customer, and extracting multi-dimensional feature information of the target customer; performing deep clustering on the target customers according to the multi-dimensional feature information to obtain a plurality of target customer groups, and determining customer group feature vectors of the target customer groups; through a trained causal inference model, based on the customer group feature vector, determining an interaction improvement gain of each target customer group under each incentive strategy; and performing multi-target optimization according to the excitation cost of each excitation strategy and the corresponding interaction improvement gain to obtain an optimal excitation strategy of each target customer group, and determining an excitation scheme of each target customer group according to the optimal excitation strategy. According to the embodiment of the invention, the accuracy of issuing incentives to customers and the drainage efficiency of the interactive platform can be improved.

This application relates to a roof drainage device, comprising a mounting frame, a filter screen, a drain pipe, and a cutting assembly. The drain pipe is vertically arranged and penetrates the roof. The mounting frame is disposed at the inlet of the drain pipe. The filter screen is disposed on the mounting frame and has several elongated filter holes. The cutting assembly includes two cutting blades and a driving unit. The two cutting blades are respectively located on both sides of the filter screen and are slidably connected to the mounting frame. The driving unit is used to bring the two cutting blades closer together and through the filter holes. This application has the effect of improving roof drainage efficiency.

The utility model discloses an anti-frosting automobile air conditioner evaporator, and relates to the technical field of air conditioner evaporators, the anti-frosting automobile air conditioner evaporator comprises an air conditioner evaporator body, the outer side surface of an evaporator shell is uniformly provided with main drainage grooves, the outer side surface of the evaporator shell is provided with a drainage leakage-proof assembly, and the main drainage grooves are communicated with the drainage leakage-proof assembly. An acceleration anti-frosting assembly is installed on the outer side surface of the evaporator shell. The first drainage groove, the second drainage groove, the main drainage groove and the fan blades are matched with one another, so that airflow is formed on the outer side of the evaporator shell, condensate water is forced to flow faster, drainage efficiency is improved, water drops are prevented from condensing and frosting on the surface of the evaporator shell, and the airflow formed by the fan blades helps the surface of the evaporator shell to dissipate heat quickly. The surface temperature is kept lower than the dew point temperature, frosting is reduced, the service life of the air conditioner evaporator body is prolonged, flowing of condensate water is accelerated, frosting on the surface of a shell is reduced, and the heat exchange efficiency of the air conditioner evaporator body is improved.

The utility model provides a drainage device convenient to filter, and relates to the related field of municipal administration. The drainage device convenient to filter comprises a drainage tank body, a filtering assembly, a dredging assembly and a fixing plate, the dredging assembly is located in the drainage tank body, and the dredging assembly comprises an extrusion plate used for extruding and filtering water and impurities. According to the drainage device convenient to filter, through the extrusion plate, water can be extruded after entering the drainage tank body, so that impurities in the water can be separated from the water, the content of the impurities in the water in drainage treatment is greatly reduced, and the drainage efficiency is greatly improved; according to the water drainage box, water can be filtered once before entering the water drainage box body, so that most impurities in the water can be adsorbed and blocked by the filter screen, the water can be extruded and filtered more effectively by the extrusion plate, and the treatment efficiency of the extrusion assembly is improved.

The invention discloses an expressway slope structure in a high-water-level area and a construction method of the expressway slope structure. The technical problem that in the prior art, the reinforcement and drainage effects are poor is solved. The expressway slope structure in the high-water-level area comprises a concrete grid, a slope layer and a slope layer, the first flexible grid is laid on the soil matrix; the porous water guide layer is laid on the first flexible grid; the second flexible grid is laid on the porous water guide layer; the concrete grid is laid on the second flexible grid; the elastic water guide layer is laid on the second flexible grid and is filled in the cavity; the filter layer is laid on the elastic water guide layer; the water plugging layer is arranged above the filtering layer, and a water storage cavity is formed between the water plugging layer and the filtering layer; the drainage mechanism is used for draining the clear liquid filtered by the filter layer in the water storage cavity into the drainage groove; and the fixing mechanism is used for fixing the concrete grid on the soil matrix.

The present invention discloses a swirl filtration type ballast water filtration device and method, which relates to the technical field of ballast water filtration, including a support frame, a swirl cylinder fixedly mounted on the support frame, and a water inlet pipe fixedly connected to the side of the swirl cylinder; a swirl part, used to drive the water in the water inlet pipe to rotate in the swirl cylinder, so that the water in the swirl cylinder forms a swirl; a filter part, used to separate the particulate impurities in the water after the swirl, and precipitate and collect the particulate impurities. The advantages are: the present invention adopts a rotating water-carrying method to change the original overflow drainage method into a rotating drainage method, which can not only improve the drainage efficiency and reduce energy loss, but also backwash the filter screen during the drainage process and provide a certain degree of vibration, thereby improving the filtration efficiency, and in the process of rotating water-carrying, it can also perform higher speed centrifugal separation again, further improving the filtration efficiency of ballast water, so that the ballast water is filtered more thoroughly.

The invention discloses a reservoir deep foundation reservoir bottom composite membrane anti-seepage structure and a construction technology, and belongs to the technical field of reservoir construction. A reservoir deep foundation reservoir bottom composite membrane anti-seepage structure comprises an intercepting and sewering ditch, a drainage system used for drainage is arranged in the intercepting and sewering ditch, the reservoir deep foundation reservoir bottom composite membrane anti-seepage structure further comprises a blind ditch drainage system, the blind ditch drainage system is communicated with the intercepting and sewering ditch, a geomembrane is laid on the end face of the top of the blind ditch drainage system, and a geotechnical blind pipe is arranged in the blind ditch drainage system; the blind ditch drainage system communicated with the cut-off ditch is formed in the reservoir bottom, the geotechnical blind pipe is laid in the blind ditch drainage system, water or gas permeating underground can be discharged into the cut-off ditch through the geotechnical blind pipe, the drainage efficiency and the safety of the geomembrane are improved, the risk that the geomembrane is floated and broken due to gas expansion is avoided, and the safety of the geomembrane is improved. Therefore, the anti-seepage effect of the reservoir can be obviously improved.

The utility model provides movable drainage equipment with a special-shaped hinged connecting rod arm frame, which can effectively expand the operation range of a submersible pump, improve the operation stability and safety and efficiently and stably perform drainage operation in complex terrains and low environments. The special-shaped hinged connecting rod arm support comprises a swing rod, a driving rod, a support rod and a follow-up rod, the lower end of the swing rod is hinged to the vehicle body, the two ends of the follow-up rod are hinged to the front end of the driving rod and the front end of the support rod respectively, the rear end of the support rod is hinged to the upper end of the swing rod, and the middle of the swing rod is hinged to the middle of the driving rod. The rear end of the driving rod is hinged with a driving device which is arranged on the vehicle body and can move back and forth relative to the vehicle body; and the submersible pump is fixed on the bracket rod.

The utility model relates to a broken bridge aluminum window frame with a drainage structure, and belongs to the field of broken bridge aluminum doors and windows, the broken bridge aluminum window frame comprises a window frame body, the window frame body comprises aluminum profiles located on the two sides, and an isobaric cavity is formed between the two aluminum profiles; an isobaric rubber strip is arranged outside the isobaric cavity, an abutting part of the isobaric rubber strip comprises a plurality of protruding heat insulation strips, a plurality of first drainage holes are formed between every two adjacent heat insulation strips, and a plurality of second drainage holes are formed in the supporting part; an inner drainage cavity is formed in the aluminum profile close to the indoor side, and an inner drainage opening is formed in the inner drainage cavity. An outer drainage cavity is formed in the aluminum profile close to the outdoor side, and an outer drainage opening is formed in the outer drainage cavity. The first drainage hole, the second drainage hole and the inner drainage opening close to the indoor side are communicated to form an inner drainage channel; the first drainage hole, the second drainage hole and the outer drainage opening close to the outdoor side are communicated to form an outer drainage channel. The heat insulation strip has the effect that accumulated water between the adjacent heat insulation strips can be cleared away more conveniently.

The invention discloses a drainage device for the department of hepatobiliary medicine. The drainage device comprises a box body, a first infusion pump, a second infusion pump, a suction pipe, a drainage pipe, a flushing pipe, an infusion pipe, a liquid collection bottle, a liquid storage bottle and a power module. Wherein the box body is of a hollow structure, a partition plate is arranged in the box body, and the interior of the box body is divided into an upper cavity and a lower cavity by the partition plate; the first infusion pump and the second infusion pump are mounted in the upper cavity of the box body; the liquid collection bottle and the liquid storage bottle are arranged in the lower cavity of the box body, the liquid collection bottle is used for storing accumulated liquid, and the liquid storage bottle is used for storing flushing water; one end of the suction tube is connected with the liquid inlet end of the first infusion pump, and the other end of the suction tube extends out of the box body and is provided with a plug for inserting a drainage tube; one end of the drain pipe is connected with the liquid outlet end of the first infusion pump, and the other end penetrates through the partition plate to be communicated with the liquid collecting bottle; and one end of the flushing pipe is connected with the liquid outlet end of the second infusion pump. The negative pressure drainage device can replace manual negative pressure drainage, and the workload of medical staff is effectively relieved.

The invention relates to a closed hydrogen-oxygen fuel cell system and a control method thereof. The closed hydrogen-oxygen fuel cell system comprises a hydrogen-oxygen fuel cell stack, an oxygen gas path, a hydrogen gas path and a nitrogen gas path, the oxygen gas path comprises an oxygen ejector, an oxygen water segregator and an oxygen water storage tank; an oxygen circulating electromagnetic valve is arranged between the oxygen ejector and the oxygen water segregator; the oxygen water segregator is connected with the oxygen water storage tank to form a drainage pipeline; the oxygen ejector and the oxygen water knockout drum are respectively connected with an inlet and an outlet of the hydrogen-oxygen fuel cell stack, so that a circulating gas path is formed among the oxygen ejector, the oxygen water knockout drum and the hydrogen-oxygen fuel cell stack; a hydrogen gas path is similar; the nitrogen gas circuit comprises a nitrogen medium-pressure electromagnetic valve and a nitrogen medium-pressure sensor, and the nitrogen medium-pressure electromagnetic valve is connected with an inlet of the oxygen proportional valve and an inlet of the hydrogen proportional valve through nitrogen branches. Compared with the prior art, the closed operation and effective drainage of the hydrogen-oxygen fuel cell system are realized, and the damage to the fuel cell system caused by difficult drainage is avoided.

The utility model relates to a simple integrated air conditioner, which comprises a shell, an upper cavity and a lower cavity, the compressor is arranged in the lower cavity; the evaporator is arranged in the upper cavity; the heat exchanger is arranged in the upper cavity; the fan is arranged in the upper cavity; a drainage tray is arranged at the bottom of the evaporator; a first water outlet is formed in the bottom of the shell, a drainage pump is arranged between the first water outlet and the drainage tray, the water inlet end of the drainage pump is in pipeline connection with the drainage tray, and the water outlet end of the drainage pump is in pipeline connection with the first water outlet. The simple integrated air conditioner has the following advantages that due to the design of the drainage pump, accumulated water in the drainage tray can be pumped out through the pipeline and then drained through the first water outlet, the drainage efficiency is high, the influence of air pressure at the first water outlet is avoided, and the accumulated water on the drainage tray can be stably drained.

The utility model relates to the technical field of constructional engineering, in particular to a water drain pipe device which comprises a pipe body and a filter screen wrapping one end of the pipe body. The pipe cover is detachably connected to the other end of the pipe body, the side face, facing the pipe body, of the pipe cover is provided with an inverted filter layer capable of filtering small gravel, and the pipe cover is provided with a drainage hole communicated with the inverted filter layer; and when the pipe cover is connected with the pipe body, the inverted filter layer is arranged in the pipe body in a penetrating manner. According to the requirement of foundation pit geology, the drainage efficiency can be improved by disassembling the inverted filter layer, or fine gravel is filtered by installing the inverted filter layer, and gravel loss is prevented.

The utility model relates to an athletic field structure adopting an overhead structure on a roof, which belongs to the technical field of constructional engineering and comprises a building roof surface, stair passages communicated with the building roof surface are arranged on two sides of the rear end of the building roof surface, and an athletic field sports layer is arranged at the upper end of the building roof surface. A plurality of downpipe channels are arranged on the periphery of the building roof surface, and roof edge drainage ditches communicated with the downpipe channels are arranged on the periphery of the athletic field sports layer. The track and field sports layer comprises a track and field runway, a football field is arranged in the track and field runway, and a roof drainage open ditch communicated with the roof edge drainage ditch is arranged between the track and field runway and the football field. The device has the characteristics of compact structure, high structural stability and good drainage effect. The problem of rapid drainage of the track field built on the building roof is solved. The utilization rate of the roof is effectively improved, the land cost of sports field construction is reduced, meanwhile, the load is reduced, and the contradiction of standardizing the drainage slope is solved.

The utility model discloses an electronic atomization device, an atomizer and an atomization core. The atomizing core comprises: a fixed tube; the heating element is arranged in the fixed pipe; the multiple liquid guide layers are attached to the periphery of the heating piece in a surrounding mode and located between the heating piece and the fixing pipe, the multiple liquid guide layers have at least two different heat-resisting temperatures, and the heat-resisting temperature of the liquid guide layer making contact with the heating piece ranges from 180 DEG C to 450 DEG C; and the heat-resistant temperature of the liquid guide layer in contact with the fixed pipe is lower than that of the liquid guide layer in contact with the heating element. Through the mode, the atomization core provided by the utility model has higher reduction degree on the original flavor expression of the aerosol matrix.