2958 results about "Water discharge" patented technology

A pet water dispenser includes a water tank for storing liquid, an upper cover installed above water tank and having a sink and a water leakage opening communicating with water tank in surface, a water pump extending into or onto upper cover from lower part of water tank and having a water supply opening in surface above upper cover; water pump includes a first accommodating chamber internally having a motor which drives pump blades below first accommodating chamber to rotate through a rotating shaft, second accommodating chambers of which walls define a pump chamber with downwards-extended wall of first accommodating chamber; a centrifugal water pump formed by pump blades in pump chamber and matched motor and including a water inlet communicating with water tank, and a water discharging opening; a water supply channel formed by second accommodating chambers sequentially communicating with water discharging opening and water supply opening.

A rain shower head including a first water outlet mechanism and a second water outlet mechanism. The first water outlet mechanism includes a water storage tank, a first water inlet pipe, a water inlet valve, a water discharge valve, and a control assembly. The second water outlet mechanism includes a second water outlet cavity and a second water inlet pipe. The first through holes of the first water outlet cavity of the first water outlet mechanism each has a cross-sectional area much greater than that of the second through holes of the second water outlet cavity of the second water outlet mechanism. The rain shower head features simple structure and convenience to use, and can achieve the basic showering function of a shower head and an instant large-water-volume showering experience, meeting the pursuit of young consumers for excitement.

To provide a water discharge nozzle and a shower head capable of suppressing the loss of generated fine bubbles and injecting the fine bubbles.SOLUTION: A water discharge nozzle according to the present invention comprises a substantially cylindrical housing having a flow channel formed therein, a fine bubble generating mechanism disposed in the flow channel, and a dispersion plate provided at the outflow side end of the flow channel, wherein the above fine bubble generating mechanism consists of a first swirling flow forming plate having a plurality of inclined holes, a cylindrical bubble generating member including an aperture with a small inner diameter in the middle region in the longitudinal direction, and a second swirling flow forming plate having the plurality of inclined holes, and the fine bubble generation mechanism is arranged so that the water flow passing through the second swirling flow forming plate directly reaches the dispersion plate.SELECTED DRAWING: Figure 1

The invention relates to an anti-deposition method and system for a sequencing batch storage and drainage sewage pipe network. The method comprises the following steps: determining the highest allowable storage water level and the lowest allowable discharge water level of each sewage pump station according to an unfavorable overflow point and a leakage point in an upstream service range of each sewage pump station; according to the historical change rule of the flow of each sewage pumping station, determining a corresponding upstream discharge water quantity increase abrupt change point; according to the drainage path of each sewage pump station and the upstream drainage amount increase abrupt change point, determining the sequence of the water storage-drainage mode of each sewage pump station; according to the drainage path and the operation mode of each sewage pump station, adjusting the operation mode and the pumping and drainage flow of other sewage pump stations; and when each sewage pump station is in the water storage-drainage mode, monitoring the liquid level change in real time, and controlling the operation state of the corresponding lift pump according to the liquid level change of each sewage pump station, the corresponding highest allowable water storage level and the corresponding lowest allowable water discharge level. According to the invention, the pollutant collection and transfer efficiency can be effectively improved.

The invention aims to provide a thermal power plant water production workshop production scheduling optimization method and device, and the device comprises a rolling time domain prediction module, a multi-source data fusion module, a multi-target optimization decision module, and a closed-loop feedback control module. The problems that in existing production scheduling, multiple factors are not fully and comprehensively considered, so that the water production cost is high, production arrangement is unreasonable, night shift production scheduling cannot be effectively reduced and the like are solved, maximization of water production economic benefits is achieved, and safe production is guaranteed. The invention provides an intelligent water production and production scheduling system and method for demineralized water of a thermal power plant. Water production cost minimization and production safety collaborative optimization are achieved through data fusion, prediction optimization and dynamic closed-loop control.

A closed loop system for and method of capture, recycling, and safe disposal of microplastics, applied to residential and commercial textile washing and drying machine devices is proposed. The closed loop system allows for effective capture, processing and recycling, or safe disposal of microplastic material. The system employs an easy-to-use filter design, optimized to capture microplastics within the device or through air or water discharge lines, followed by post-processing of filter devices where the captured microplastic residue is physically or chemically processed for either recycling the captured microplastic residue into new filters or new products, or alternatively the captured microplastic residue can be locked into a safe matrix for disposal, wherein leaching from landfills into the environment is minimized or eliminated.

To properly execute control relating to discharge and stop of water.SOLUTION: A water discharge control system according to an embodiment comprises: a water discharge part; a water discharge / stop switching part to switch water discharging and stopping of the water discharge part; an image part to image a water use space; a determination part to determine a recognition target detected by an image imaged by the image part; and a control part to control the water discharge / stop switching part. The determination part determines condition of the recognition target when the recognition target is a human hand. The control part controls water discharge or stop of the water discharge part by controlling the water discharge / stop switching part based on determination result of the determination part.SELECTED DRAWING: Figure 8

The utility model discloses a sparkling water machine, which belongs to the field of household electric appliances, solves the problems of splashing of water discharged from the sparkling water machine and unstable flow of the water discharged from the sparkling water machine, and adopts the technical scheme that the sparkling water machine mainly comprises a water supply component, a gas supply component, a mixing cavity and a gas-liquid separator, the gas supply assembly is communicated with the mixing cavity and supplies gas to the mixing cavity, the gas-liquid separator is provided with a gas-liquid separation cavity, a water inlet, a water outlet and an exhaust port, the gas-liquid separation cavity is communicated with an outlet of the mixing cavity through the water inlet, bubble water in the gas-liquid separation cavity is discharged through the water outlet, gas is discharged through the exhaust port, and the exhaust port is provided with a pressure release valve. A baffle for preventing high-pressure bubble water flowing in from the water inlet from rushing open the pressure release valve is arranged in the gas-liquid separation cavity; and the baffle is blocked between an impact path of the high-pressure bubble water and the pressure release valve. The utility model is mainly used for preventing the water outlet from splashing in the process of discharging bubble water, and improving the stability of the water outlet flow.

The utility model discloses a sewage treatment tank and equipment. The sewage treatment tank comprises a tank body, and a drainage pipe assembly is arranged at the bottom of one side of the tank body; the filtering structure is arranged in the tank body and is relatively close to the drain pipe assembly, and the filtering structure comprises a filter screen which is used for filtering water discharged from the drain pipe assembly; the stirring mechanism is arranged in the pool body and comprises a first driving assembly and a stirring plate assembly, and the first driving assembly is used for driving the stirring plate assembly so that the stirring plate assembly can scrape away impurities accumulated on the outer side of the filter screen. Water needing to be discharged is filtered through the filter screen of the filter structure, impurities in the water are prevented from blocking the interior of the drainage pipe, meanwhile, the first driving assembly is started in the drainage process to drive the stirring plate assembly to rotate, and therefore the impurities on one side of the filter screen can be scraped, and the situation that the impurities are accumulated on one side of the filter screen, and water discharge is affected is prevented.

The invention discloses a drainage farmland underground water burial depth prediction method and system, and belongs to the technical field of agricultural prediction. Obtaining daily actual evapotranspiration, lateral displacement and groundwater burial depth prediction values through physical process model simulation; determining an actual absolute error of a daily groundwater burial depth predicted value output by the physical model, determining a daily moisture balance intermediate variable, taking the daily moisture balance intermediate variable and the groundwater burial depth predicted value as input variables, and performing training according to the corresponding actual absolute error to obtain an absolute error prediction network; according to the absolute error prediction network, the predicted value of the absolute error is obtained and serves as the correction amount, the groundwater burial depth predicted value obtained through physical process model simulation is corrected, the corrected groundwater burial depth predicted value is obtained, and the method can more accurately and reliably simulate GWD dynamic changes under different drainage conditions.

The utility model relates to a membrane filtration system which comprises a water collecting pipeline and a membrane filtration device installed on the water collecting pipeline, the membrane filtration device is provided with a membrane element, and the water collecting pipeline comprises a water production header pipe, a water inlet header pipe and a water drainage header pipe which are arrayed in the same plane in the horizontal direction and are provided with closed upper ends and open lower ends; the water production manifolds are symmetrically communicated with the two sides of the water production header pipe and are rigidly connected with the water inlet header pipe and the water drainage header pipe respectively; the water inlet manifolds are symmetrically communicated with the two sides of the water inlet header pipe and are rigidly connected with the water production header pipe and the water drainage header pipe respectively; the drainage manifolds are symmetrically communicated with the two sides of the drainage main pipe and are rigidly connected with the water inlet main pipe and the water production main pipe respectively; a penetrating fluid outlet communicated with the water producing manifold, a pretreatment liquid inlet communicated with the water inlet manifold and a concentrated liquid outlet communicated with the water discharging manifold are formed in the membrane element. The manifolds and the membrane elements are installed in a simplified and matched mode, the manifolds and the header pipe are supported by each other through rigid connection, and the auxiliary fixing structure is simplified.

The invention relates to the technical field of intelligent control, and discloses a drainage control method of a sanitation vehicle. The method comprises the following steps: acquiring environment data of a working area through a sensor, and inputting the data into a trained LSTM model; dynamically calculating water discharge amount and water discharge pressure according to the pollution predicted value, and adjusting a water discharge angle by using vehicle speed and road gradient information; and a Dijkstra algorithm is used to plan a cleaning path. Compared with the technical problems that in the prior art, drainage control parameters are fixed, path planning is lack of flexibility, and particularly under the conditions of complex road conditions and different pollution degrees, accurate drainage and efficient cleaning cannot be achieved, the method adapts to different operation conditions by introducing a prediction model, dynamically adjusting drainage parameters and intelligently planning the path, and the operation efficiency is improved. Intelligent cleaning control is realized, so that the problem of low cleaning efficiency is avoided, and the working efficiency of the sanitation vehicle is improved.

The invention discloses a joint manipulation control method for underwater vehicle advancing based on'heavy buoyancy + rudder 'and an underwater vehicle. The joint manipulation control method comprises the following steps: acquiring a balance attack angle and a balance rudder angle of the underwater vehicle at the current moment; using a preset self-balancing control algorithm to iteratively feed back and control the water injection / drainage amount and the head-tail water displacement amount of a bow water tank and / or a stern water tank of the underwater vehicle, so that the balance attack angle and the balance rudder angle both tend to be zero, and obtaining a control result of the underwater vehicle; according to the control method, the water injection / drainage amount and the head and tail water moving amount of the bow water tank and / or the stern water tank of the underwater vehicle are controlled in a feedback mode, the problem that the navigation quality is reduced due to the fact that the initial balance weight buoyancy is too large can be solved, and in the navigation process, the control result of the underwater vehicle is output. The water injection / drainage amount and the head-tail water moving amount of the bow water tank and / or the stern water tank of the underwater vehicle are controlled in a feedback mode, the balance attack angle and the balance rudder angle can be effectively reduced, and therefore the resistance in the navigation process is greatly reduced, energy is saved, and the operation time is prolonged.

The present invention discloses a distributed water mixing heating device, which specifically relates to the technical field of water mixing heating, including a heating pipe, a filter assembly 1 is fixedly connected to the rear end of the heating pipe, two symmetrically arranged filter assemblies 2 are fixedly connected to the rear end of the filter assembly 1, and the ends of the two filter assemblies 2 close to each other are fixedly connected to a water mixing assembly, a heating assembly is fixedly connected to the right side of the rear end of the water mixing assembly, and a storage assembly is fixedly connected to the left side of the heating assembly. A distributed water mixing heating device of the present invention can drive a toggle rod to rotate through a transmission belt when an impeller is impacted by a water flow, so that the corrosion and scale inhibitor can be added in an appropriate amount according to the water output, thereby ensuring that the corrosion and scale inhibitor reaches an optimal concentration in the circulating water, thereby avoiding the formation of metal corrosion residues and scale in the inner cavity of the heating pipe when the metal equipment is used for too long, and further extending the service life of the equipment.

The present invention provides a device for regulating the water temperature discharged from a reservoir. The device for regulating the water temperature discharged from the reservoir includes a power station intake tower, a cable-stayed tower, a support platform and a water retaining system. The cable-stayed towers are respectively arranged on both sides of the water inlet of the power station intake tower. The support platform is a horizontal circular arch, and both ends of the support platform are connected to the cable-stayed towers. The water retaining system is connected to the circular-arch-shaped support platform and extends downward to the lower part of the reservoir. The water retaining system includes columns, collar rings, a water retaining curtain and a hoist. A plurality of collar rings are sleeved on the columns. The water retaining curtain is connected to the support platform and the plurality of collar rings. The hoist is connected to the upper collar ring. By arranging the cable-stayed towers on both sides of the water inlet of the power station intake tower, the present invention realizes the technical solution of implementing the water retaining system on a single-side bank slope, without blocking the main river channel, and the flood discharge condition does not need to bear the flood load.

The invention discloses a quick self-cleaning fish bucket culture pond which comprises a fish bucket pond, the fish bucket pond comprises a cylindrical bucket body and an inverted-cone-shaped bucket bottom, a sewage discharge pipe is arranged at the bottom of the inverted-cone-shaped bucket bottom, a water discharge pipe is arranged on the lower portion of the cylindrical bucket body, and a plurality of water pushing pipes are arranged on the outer side of the fish bucket pond. The bottom of the water pushing pipe is connected with an external water inlet pipe, a sewage draining siphon device is arranged in the middle of the fish barrel pool, and an opening is formed in the center of the bottom of the inverted-cone-shaped barrel bottom. Through the design of the cylindrical-conical combined working area of the fish bucket culture pond, the water pushing pipe and the pollution discharge siphon device of the fish bucket pond, fish excrement and residual feed can be quickly sucked, discharged and separated from culture water, and conversion of solid organic pollutants into water-soluble pollutants in the water is greatly reduced; meanwhile, a culture area and a pollutant precipitation and solid-liquid separation area generated in culture are combined into a whole, so that the construction space and the construction cost are greatly saved.

To provide a compaction state control method of a filter material layer which changes an index of the end of discharge of compaction water according to the state of a filter material, and thereby forming a filter material layer in a state optimal for filtration treatment.SOLUTION: A filtration device for performing compaction treatment of discharging compaction water stored in a filtration tank before filtration treatment from below, and compacting a filter material layer by a dynamic pressure at the time of discharge includes: previously setting a foundation discharge value as a discrimination index of a compaction state; gradually setting a coefficient corresponding to a duration time of an immediately-preceding filtration treatment step; calculating a coefficient from an immediately-preceding filtration duration time; calculating a reference discharge value by multiplexing the foundation discharge value by the coefficient; discriminating that the compaction state is satisfactory, and finishing the compaction water discharge step, when at least one discharge value of the discharge speed and the discharge flow rate of the compaction water reaches a reference discharge value; and discriminating that the compaction state is not satisfactory, and shifting the step to a compaction water storage step again, and thereby improving filtration treatment efficiency, when the discharge value does not reach the reference discharge value.SELECTED DRAWING: Figure 3

The invention belongs to the technical field of water conservancy projects, and discloses a large-scale deep reservoir discharged water temperature short-term rapid prediction system, which comprises a data acquisition module used for acquiring an input data set; the data set optimization module is used for screening and reconstructing the input data set according to a screening factor determined by a principal component analysis method to obtain an optimized input data set; the data normalization processing module is used for performing normalization processing on the optimized input data set; the water temperature short-term rapid prediction model is used for obtaining a water temperature prediction result according to the input data set after normalization processing; and an LSTM-Transform network model is used in the water temperature short-term rapid prediction model. The method is short in calculation time consumption and high in prediction precision, the discharged water temperature of the reservoir can be mastered in advance, technical support is provided for water temperature management of the reservoir, ecological scheduling of the reservoir and the like, and the method has a huge application prospect.

The invention provides fire extinguishing spraying equipment which comprises a stator and a rotor arranged outside the stator, a water flow channel is designed in the stator, a connector capable of rotating around the stator is movably connected to the lower end of the stator, a nozzle is connected to the connector, and the connector or the nozzle is in transmission connection with the rotor. And the rotor can drive the nozzle to rotate in a rotating state. Spraying equipment is designed to be of a rotatable positioning water outlet structure, original fixed blasting type fire extinguishing spraying is innovated and upgraded, more accurate fire extinguishing is achieved, the spraying equipment is improved, the fire spreading risk is reduced, the fire prevention and extinguishing capacity of a defense area is greatly improved through application of the technology, and the device is simple in structure, good in durability and high in practicability. And the practicability and the chemical degree are high.

The swimming pool cleaner comprises a shell, a water pump, a power source and a switch used for controlling starting and stopping of the water pump, the water pump is arranged on the shell, and the power source is electrically connected with the water pump; a dirt suction head is arranged on the lower portion of the shell, a dirt outlet and a water inlet are formed in the shell, the dirt suction head and the dirt outlet are communicated through a Venturi tube, one end of the dirt suction head extends into the Venturi tube, a water outlet channel is arranged between the dirt suction head and the Venturi tube, a dirt suction opening is formed in the other end of the dirt suction head, and the water inlet is communicated with the water outlet channel. The water outlet channel is communicated with the Venturi tube; the water pump is used for driving liquid to flow from the water inlet to the water outlet channel. The swimming pool cleaner has the following advantages that one end of the dirt suction head extends into the Venturi tube, so that water discharged from the water outlet channel can be prevented from reversely flowing into the dirt suction head; no impeller or other parts are arranged in the whole venturi tube channel, so that large-particle articles can smoothly pass through, hair in water does not need to be wound on the water pump, and normal work of the water pump is guaranteed.

The invention provides a three-dimensional numerical simulation method and system for supercavitation projectile high-speed inclined water discharge, and the method comprises the steps: building a three-dimensional geometric model of a projectile and a flow field computational domain, and outputting projectile body attribute parameters; estimating the size of a projectile body motion area, performing grid division on the projectile body and a flow field calculation domain, importing fluid solving software, establishing an overlapping calculation domain, and setting projectile attribute parameters and fluid solver boundary conditions; the influence of compressibility of water on the high-speed projectile is considered, a user-defined function is adopted, and the nonlinear relation between the density and the pressure of the compressible liquid under the isothermal condition is established; initial motion parameters of the projectile are defined, numerical solution is carried out, and cavitation evolution, flow field distribution, stress and motion characteristics in the water outlet process of the high-speed inclined projectile are obtained. According to the invention, the high-speed inclined water outlet process of the projectile under different working conditions can be simulated, the cost can be effectively reduced, and a technical basis is provided for a submarine launching test.

The invention provides a cold region high dam reservoir discharged water temperature variation degree research method based on a factor analysis method. The method comprises the steps that a water temperature index system is constructed; selecting a research area, obtaining original data, and preprocessing the original data; performing zero-mean standardization on the original data to obtain effective data; and evaluating the variation degree of the discharged water temperature of the reservoir by using a factor analysis method. According to the method, the variation degree of the discharged water temperature of the high dam reservoir in the cold region is evaluated through a factor analysis method, related variables are summarized into several independent common factors, each variable is loaded on one factor as much as possible, the obtained common factors reflect information of original variables more accurately compared with principal components, the data analysis efficiency is improved, and the accuracy of data analysis is improved. And each index weight represents the comprehensive contribution proportion of the factor analysis evaluation score.

The invention discloses a rainstorm ground waterlogging prediction method, device, equipment and product, and relates to the technical field of urban waterlogging prediction.The rainstorm ground waterlogging prediction method comprises the steps that ephemeris and ground observation station data are obtained, the atmospheric moisture delay amount and the high-altitude water vapor conversion factor are calculated respectively, the historical water vapor content is calculated, and the future atmospheric precipitable water amount is predicted; rainfall time distribution data are obtained through rainstorm intensity decomposition; calculating the rainwater overflow amount of the catchment area in combination with the water discharge amount time distribution data of the urban drainage pipe network; and iterative calculation is carried out by using a digital elevation model grid to obtain the waterlogging depth, and waterlogging early warning information is sent out. By constraining the total rainfall amount, the rainfall amount can be effectively constrained by predicting the precipitable water amount based on the satellite ephemeris; the underground pipe network drainage is restrained, and a water flow condition in a pipe channel is simulated by adopting an SWMM model; and finally, the waterlogging accumulated water volume is calculated, constraint verification is carried out on each link of urban waterlogging, and relatively high precision and relatively long timeliness are ensured.

The invention relates to the technical field of offshore wind turbines, in particular to an installation and recovery method of a submersible mud floating type offshore wind turbine system. The method comprises the following steps: S1, mounting stage of wet-mopping auxiliary units: mounting at least two wet-mopping auxiliary units on the periphery of the submersible mud floating type offshore wind turbine; s2, the transportation stage of the wet dragging auxiliary units, wherein a tugboat is fixed to two of the wet dragging auxiliary units through a dragging cable, and the water filling and discharging amount of each buoyancy compartment is controlled through an air-water replacement valve in the transportation process; s3, a dismounting stage of the wet mopping auxiliary units: after a destination is reached, power sources and control sources of all the wet mopping auxiliary units are closed, and fixation of the submersible mud floating type offshore wind turbine and the wet mopping auxiliary units is relieved; s4, the installation stage of the submersible mud floating type offshore wind turbine; S5, the recovery stage of the submersible mud floating type offshore wind turbine; and S6, the steps S1 to S3 are executed repeatedly. According to the technical scheme, the problem that a traditional wet mopping mode is limited in operation under severe sea conditions can be solved, installation is easy and convenient, and cost is low.

The invention provides an anchor-plate-injection collaborative supporting method for active water sealing. The anchor-plate-injection collaborative supporting method is applied to various laneways penetrating through water-containing stratums, especially to construction of vertical shafts constructed through a freezing method. During freezing method construction, a freezing wall is formed firstly, a section height is excavated, an anchor rod is drilled and constructed after the section height is excavated, and if water exists after excavation, forced drainage needs to be carried out to enable the displacement to be larger than the water inflow so as to ensure that no accumulated water exists on a working face; the steel plates are fixed through anchor rods, so that grouting gaps are formed between the steel plates and the well wall; a gap between the bottom edge of the steel plate and the well side is blocked by a certain height through foam; grout is injected through a grouting pipe on the lower portion of the steel plate, and a primary supporting structure is formed after solidification; secondary and more supporting can be carried out immediately or after primary supporting of multiple section heights is formed, and a permanent supporting structure is formed. A traditional passive waterproof mode is broken through, and active water plugging can be achieved; the method adapts to various construction methods and stratums; the temporary support is essentially different from a traditional anchor-shotcrete net temporary support, and the construction efficiency is higher.

The invention relates to a fin and a heat exchanger, and the fin comprises a base plate, the base plate is provided with a pipe hole used for allowing a refrigerant pipe to penetrate through, and the base plate is provided with a windward side in the airflow flowing direction; the windward plate is connected with the base plate and located on the windward side; wherein a slit is formed in the base plate, and the slit is located between the pipe hole and the windward plate. The windward plate is in contact with airflow preferentially, and the slits between the pipe holes and the windward plate can prevent low temperature at the refrigerant pipe from being transmitted to the windward plate area to a certain extent, so that relative high temperature of the windward plate area is formed, wet airflow does not immediately frost or cannot reach the frosting condition after being condensed on the windward plate, and more condensate water is generated. After the condensed water is collected and does not frost, the condensed water can flow from top to bottom along the windward plate under the action of gravity, the condensed water on the windward plate is fast in collection and flowing speed, and the condensed water is not prone to frosting after being left. The fin has the advantages of being high in overall condensate water discharge efficiency, not prone to frosting and high in heat exchange efficiency.

The invention discloses a water index prediction method based on sewage treatment, which comprises the following steps of: stirring and standing water, dividing regions and depths, establishing a local position water supply amount model, adjusting water inlet indexes for the first time, and establishing a logarithmic function model to predict the water inlet indexes of different depths. Finally, five models are established to predict the PH value, the COD, the ammonia nitrogen content, the total phosphorus content and the total nitrogen content respectively, and predicted values are displayed after time correspondence. According to the method, firstly, water supply and layered modeling are performed after standing, then dynamic changes of water quality indexes are accurately reflected in combination with the vertical distribution characteristics of fluid after standing, and a logarithmic function is constructed based on the law that the concentration is attenuated along with time during precipitation and diffusion of pollutants to predict water inlet indexes in the depth direction to reduce the sampling frequency. By means of grid dynamic correction and weighting of the displacement proportion by means of the arithmetic mean value, sampling deviation caused by flow disturbance is reduced, prediction robustness is improved, it can be guaranteed that the quality of sewage is relatively uniform through the scheme, then the optimized water inlet index is obtained by weighting the displacement proportion by means of the mean value of the water inlet indexes of all the areas, and the prediction accuracy is improved. And calculating the optimized water inlet indexes through the constructed logarithmic function to obtain water inlet indexes of different depths, and inputting the water inlet indexes of different depths into the set five groups of models for calculation and prediction to obtain water outlet indexes.

The invention relates to a mining negative-pressure energy-consumption-free automatic water drainage device, and belongs to the technical field of gas safety devices.The water drainage device comprises a water storage tank, a gas inlet pipe, a gas outlet pipe and an automatic switch, and the automatic switch comprises a center lead screw, a ventilation switch, a water drainage switch, a negative-pressure blocker, a lifter, a floating ball and a balancing weight. When accumulated water in the water storage tank is increased, buoyancy drives the central lead screw to move upwards through the floating ball, the water discharge switch and the ventilation switch are gradually turned on, the accumulated water is discharged through the water discharge port, meanwhile, the lifter pushes the negative pressure blocker through the connecting rod to seal the air outlet pipe, and negative pressure is kept in the tank. Along with descending of the liquid level, the balancing weight drives the center lead screw to descend, the water drainage switch and the ventilation switch are gradually closed, meanwhile, the gas outlet pipe is opened, an extraction system can normally operate, the structure is simple, pure mechanical automatic water drainage is achieved, and all the switches act synchronously and are coordinated and consistent.

The floor washing machine comprises a machine body, a cleaning main body arranged at the bottom of the machine body and a clean water tank arranged on the machine body, a mounting cavity with an upward opening is formed in the front side of the cleaning main body, and a water outlet assembly and a roller brush assembly are detachably arranged in the mounting cavity; the water outlet assembly comprises a waterway plate and a water pump for connecting the waterway plate and the clear water tank, a step part matched with the outline of the waterway plate is arranged in the mounting cavity, a water supply connecting piece communicated with the water pump is arranged on the step part, the waterway plate is matched with the water supply connecting piece in an inserting manner, and a plurality of water outlets which are transversely arranged at intervals are formed in the waterway plate; a water path channel is arranged in the water path plate, the water path channel is provided with a water inlet section deviating from the center of the water outlet, a pressurizing section and a water outlet section, the pressurizing section and the water outlet section are connected with the water inlet section, the pressurizing section extends to the outer side of the water outlet in the water path direction, and the water outlet section detours to the water outlet from the outer side.

The invention belongs to the technical field of mine engineering, and particularly discloses a dynamic simulation method for water inflow attenuation in the construction process of a water cut-off curtain of a strip mine. The method comprises the following steps: acquiring meteorological data according to the position of a strip mine, acquiring a hydrogeological structure in combination with drilling data, acquiring hydrogeological parameters by using a water pumping test, and acquiring a source convergence item according to water pumping and drainage; the method comprises the following steps: constructing a hydrogeological model by adopting MODFLOW-USG, constructing a mine pit drainage mathematical model and a mine pit drainage model, setting source sink items and boundary conditions, and realizing dynamic simulation based on python; a PEST calibration model is adopted, parameters are subjected to standardization processing, a random forest substitution model is constructed, SHAP values of all the parameters are analyzed and calculated and normalized to obtain global importance indexes, and the model is optimized; and evaluating the optimized model by adopting NSE, KGE and RMSEs. The method has the advantages of being high in model precision, clear in parameter physical significance and capable of being corrected with measured data in real time.