290 results about "Environment water" patented technology

The invention relates to the technical field of error correction, in particular to a water conservancy facility environment interference error correction method and device based on multi-dimensional data. The method comprises the following steps: collecting historical monitoring logs of water conservancy facilities, carrying out environmental disturbance event identification and multi-scale disturbance relevance mining, and constructing an environmental disturbance space-time relevance map; monitoring surrounding environment water monitoring parameters of the water conservancy facility, performing sequential response trend change analysis and dynamic response characteristic modeling, and constructing a facility environment personalized change response portrait; identifying a plurality of water body position monitoring data according to the surrounding environment water body monitoring parameters, and constructing a hydrodynamic full-field sensing graph; and performing nonlinear correlation analysis based on the hydrodynamic full-field perception graph and the personalized change response portrait of the facility environment, and constructing a digital twinborn model of the water conservancy facility under the water flowing condition. According to the invention, through dynamic error trend analysis and correction, the monitoring precision and monitoring stability of the water conservancy facility are improved.

The invention belongs to the technical field of environmental water quality pollution monitoring, and particularly relates to a drainage basin water environment monitoring and emergency pollution rapid tracing method and system based on water quality pollution detection, and the method comprises the following steps: constructing a multi-parameter cooperative monitoring model, and carrying out the training and deployment; through distributed sampling points and sampling stations, real-time data with verification marks and time-sharing data of watershed water environment water quality pollution detection are collected; mLP and LSTM / GRU models are adopted, EEM spectrum data and environment characteristics are fused, and multi-source heterogeneous data are fused and analyzed; whether an emergency pollution event occurs or not is automatically identified according to a preset condition, the pollution types and traceability results of water environment monitoring and emergency pollution are automatically output, manual further checking is carried out, and environmental law enforcement checking is carried out. According to the invention, drainage basin water environment pollution condition monitoring and emergency pollution rapid tracking and tracing can be completed in a large-range, low-cost and high-efficiency manner so as to support environment law enforcement.

The invention discloses a method and system for detecting trace organic pollutants in a water body, and relates to the field of environmental water body detection.The method comprises the steps that environmental parameters of a target water body sample to be detected are collected, and baseline spectral data of the target water body sample are obtained; determining disturbance operation parameters matched with the target water body sample, and applying micro-disturbance to the target water body sample according to the disturbance operation parameters to obtain disturbance response spectral data; performing time sequence differential analysis on the disturbance response spectral data and the baseline spectral data to obtain a disturbance response residual error spectrum, and identifying an optimal response characteristic wavelength from a characteristic response wavelength interval of the target trace organic pollutants based on the disturbance response residual error spectrum; and solving the concentration correction model according to the optimal response characteristic wavelength, the disturbance operation parameters and the environmental parameters to obtain the concentration of the target trace organic pollutants. Therefore, the detection sensitivity and the anti-interference capability of trace organic pollutants in the water body sample are improved.

The utility model relates to the technical field of water conservancy and hydropower construction, and discloses a multi-environment water quality detection device for water conservancy and hydropower construction, which comprises a tank body, a fixing ring is sleeved on the surface of the tank body, supporting plates are fixedly connected with two sides of the fixing ring in an axial symmetry manner, and a supporting block is fixedly connected with the top of one end of each supporting plate. The top of the supporting block is fixedly connected with a filtering assembly used for filtering sand and stones in water. According to the multi-environment water quality detection device for water conservancy and hydropower construction, through the arrangement of the stirring assembly, a water source enters the tank body after being filtered, and when a worker needs to detect the water source, a driving motor can be connected to an external power source in advance, so that the driving motor drives an annular blade to stir in the tank body through a rotating rod; pollutants in water can be uniformly distributed by stirring the sample water, so that the condition of water quality is reflected more accurately, the condition that the concentration of local pollutants is too high or too low is avoided, and the accuracy of water quality detection data is further improved.

The invention relates to the technical field of nano-materials, in particular to a CeO2 nano-enzyme with controllable surface performance as well as a preparation method and application of the CeO2 nano-enzyme. The preparation method comprises the following steps: preparing a CeMOFs precursor by using a solvent-free method; the CeMOFs precursor is subjected to thermal activation treatment, and the CeO2 nano-enzyme with the controllable surface performance is obtained; the invention also provides an application of the CeO2 nano enzyme in the detection of organophosphorus ester compounds. CeMOFs are synthesized through a direct pyrolysis solvent-free method, then CeO2 with high phosphatase sample activity is prepared, and a sensitive colorimetric method is provided for evaluating the degree of organic phosphorus pollution to food and environmental water samples.

The invention relates to the field of water quality monitoring, in particular to a water area environment water quality on-line intelligent monitoring device and method, and the water area environment water quality on-line intelligent monitoring device comprises a shell, a defoaming mechanism and a monitoring mechanism; a water inlet and a water outlet are formed in the shell, and a water flow channel is formed in the shell; a water inlet valve is mounted at the water inlet; the defoaming mechanism comprises a negative pressure cylinder arranged in the shell and a piston assembly arranged in the negative pressure cylinder; the piston assembly moves upwards to suck the water flow channel to negative pressure, bubbles in water flow are promoted to be separated out, the pressure difference between the two sides of the water inlet valve is increased, and the water flow is promoted to enter the water flow channel through the water inlet valve. The opening threshold value of the water inlet valve is adjusted according to the gas amount in the water flow, so that new water flow enters from the water inlet valve when the piston assembly sucks the water flow channel till the absolute value of the negative pressure is large enough, and the separation effect of bubbles in the original water flow and the new water flow in the water flow channel is guaranteed. And the water quality monitoring accuracy of the monitoring mechanism is improved.

The invention discloses a functional material based on red mud waste loaded Fe-MOF as well as a preparation method and application of the functional material. At present, when a bayer process is adopted to smelt bauxite to obtain a metal material aluminum in industry, a solid waste named red mud can be generated. The accumulation of a large amount of red mud can cause serious pollution to the environment. Therefore, the invention provides a method for preparing a catalytic material based on acidified aluminum industrial waste red mud composite Fe-MOF and a treatment process of pollutants in a water environment. The composite material RM-MIL is prepared through an in-situ compounding method, and the composite material can remove 97.6% of organic pollutants in environmental water in an adsorption-degradation process. The composite material and the treatment process thereof developed by the invention have wide application value in the field of sewage treatment, and a feasible method is provided for resource development of the waste red mud by the Bayer process.

The invention belongs to the technical field of surveying and mapping, and provides a power transmission and transformation line environment water conservation information surveying and mapping system based on resolution optimization, and the system comprises a basic information obtaining module which is used for obtaining a remote sensing image of power transmission and transformation line environment water conservation through shooting by using a high-resolution satellite and combining with an unmanned aerial vehicle, and obtaining basic information; the information optimization module is used for performing partial content optimization on the basic information by using ground measurement equipment to obtain optimized basic information; and the surveying and mapping implementation module is used for drawing the ring water conservation information of the power transmission and transformation line based on the optimized basic information. According to the method, the remote sensing image of the power transmission and transformation line environment water conservation is shot by using the high-resolution satellite in combination with the unmanned aerial vehicle and the ground measurement equipment, and the power transmission and transformation line environment water conservation information is drawn based on the remote sensing image, so that the drawing quality of the power transmission and transformation line environment water conservation information can be improved; and data support is provided for whole-process management and control of power transmission and transformation project environment water conservation.

The invention provides a method for detecting PFAS based on a three-dimensional Ag / NiFe-LDHs surface enhanced Raman scattering substrate and ion pair extraction, and belongs to the technical field of PFAS detection.The method comprises the steps that firstly, the three-dimensional Ag / NiFe-LDHs SERS substrate is prepared, then ion pair extraction-dissociation treatment is conducted on a water sample to be detected, a detection solution is obtained, finally, the substrate is immersed in the detection solution for adsorption, and finally the detection solution is obtained. A spectrum is collected through a Raman spectrometer, and semi-quantitative detection of PFAS in a water sample is achieved according to the linear relation between the characteristic peak intensity and the PFAS molar concentration logarithm. According to the method, collaborative application of the three-dimensional Ag / NiFe-LDHs SERS substrate and an ion pair extraction technology and indirect detection of PFAS are realized, the detection difficulty that PFAS Raman signals are weak and are difficult to enrich is improved, the detection sensitivity and adaptability of PFAS in a water sample are improved, and an application foundation is laid for rapid monitoring of PFAS pollution of an environmental water body.

The invention relates to a preparation method and application of a 2D / 2D heterostructure wave-absorbing material based on solvent regulation and control growth, and belongs to the technical field of preparation of wave-absorbing materials. The preparation method comprises the following steps: constructing 2D tabular Bi4NbO8Cl which mainly exposes {001} and {110} high-activity crystal faces through a crystal face engineering technology, and further performing in-situ growth of a 2D ZnIn2S4 nanosheet on the surface of Bi4NbO8Cl, thereby obtaining the ZnIn2S4 / Bi4NbO8Cl composite wave-absorbing material. Under MW driving, the material shows ultrahigh catalytic degradation activity on OTC, and has potential application prospects in the aspect of purification of environmental water bodies polluted by antibiotics.

The invention relates to the technical field of water conservancy control, and discloses a water conservancy gate cooperative control method and system, and the method comprises the steps: fusing the real-time operation parameters and environmental hydrological parameters of a water conservancy gate, and obtaining a dynamic feature data set; identifying the interaction relationship between the water level and the flow velocity parameter, and constructing a hydraulic association network; determining a leading gate and an auxiliary gate based on the network edge weight, and generating an initial control instruction sequence; a control effect data set is formed by monitoring actual data and an operation state of opening degree adjustment; analyzing a control deviation between the control effect data set and an expected control target to correct an action time sequence and an opening parameter in the gate coordination rule to obtain an optimal control strategy; a gate cooperation rule in the optimization control strategy is fed back to the construction process of the hydraulic association network, and the judgment standards of the main gate and the auxiliary gate are updated; the cooperative control efficiency of the water conservancy gate can be improved.

The invention relates to the technical field of environmental water sample detection, and provides pretreatment equipment for measuring and analyzing C-14 in an environmental water sample, the pretreatment equipment comprises a reaction container, a condensing device, a drying device and a collecting device, the reaction container comprises a reaction cavity, a liquid outlet and a gas outlet, and the liquid outlet and the gas outlet are both communicated with the reaction cavity; the condensing device comprises a condensing cavity, a condensing inlet, a condensing outlet and a cooling cavity, the condensing inlet and the condensing outlet are both communicated with the condensing cavity, the condensing inlet is communicated with the air outlet, the cooling cavity is used for circulating cooling fluid and isolated from the condensing cavity, and the condensing cavity is located in the cooling cavity; the drying device is communicated with the condensation outlet and is used for absorbing water vapor; the collecting device is communicated with the drying device, and absorption liquid is contained in the collecting device and used for absorbing carbon dioxide from the reaction cavity. The pretreatment equipment can be used for pretreating a carbon-containing compound in an environmental water sample, and the requirement for measuring C-14 in the environmental water sample, especially in a surrounding environmental water body of a nuclear power station, is met.

The invention, which relates to the technical field of water resource management, discloses a block chain-based watershed environment water volume allocation system comprising a data acquisition module for acquiring real-time data; the risk assessment module is used for calculating a decoupling risk index; the self-adaptive regulation and control module is used for generating an initial regulation and control vector in combination with multiple factors; the safety verification layer is used for determining an optimal regulation and control vector; and the intelligent contract execution module executes corresponding regulation and control according to the risk level to form an automatic closed loop from sensing to execution. According to the method, multi-source heterogeneous data are integrated through a block chain technology, and a credible shared drainage basin database is constructed; a decoupling risk index is dynamically calculated, and conflicts between market transactions and ecological safety are accurately quantified; prospective regulation and control are realized by combining deep reinforcement learning with meteorological prediction; a differential strategy is executed based on a hierarchical intelligent contract, a closed loop from sensing, decision making to execution is formed, dynamic and accurate management of drainage basin water resources is achieved, and market and ecological requirements are balanced.

The utility model provides an environmental water quality sampling device, which belongs to the technical field of environmental detection and is provided with a top plate, a driving disc and a driven disc are rotatably connected onto the top plate, and a mounting disc positioned below the driven disc is fixedly mounted in the middle of the driven disc through a connecting rod; a plurality of mounting grooves are formed in the mounting disc at equal intervals along the circumference of the mounting disc, a plurality of strip-shaped grooves corresponding to the mounting grooves are formed in the driven disc, and a driving column is fixedly mounted on the driving disc and is in sliding connection with the strip-shaped grooves; sampling devices are mounted on the mounting grooves, water taking cavities are formed in the sampling devices, water inlet pipelines are fixedly mounted at the upper ends of the outer walls of the sampling devices, water outlet pipelines are fixedly mounted at the lower ends of the outer walls of the sampling devices, and the water inlet pipelines and the water outlet pipelines are communicated with the water taking cavities. The utility model solves the technical problems that the detection sample obtained at the same position is single, and if the sampled water is polluted by mistake after sampling, the detection result is inaccurate.

The invention provides an underwater high-pressure dry type welding cabin test verification method, and relates to the technical field of sunken ship salvage, and the method comprises the following steps: testing the sealing performance and effectiveness of a magnetic adsorption mechanism and a rubber seal on a welding cabin under the 300-meter environmental water pressure under the action of the designed magnetic adsorption force and the 5-meter internal and external pressure difference; testing the sealing performance of the watertight door on the welding cabin under the environment water pressure of 300 meters, including testing the effectiveness of opening and closing of the sealing door and the effectiveness of sealing of the sealing door; according to the invention, subsystem process tests such as a high-pressure adsorption sealing test, a watertight door high-pressure functional test, an air pressure control system high-pressure test, a propulsion ballast system shallow water test, a robot high-pressure action test, a welding process laboratory inspection and the like, a pool test of an integrated system, a shallow water functional test and a final sea test are carried out; a scientific, rigorous and complete test verification system is formed, and the feasibility of the underwater high-pressure dry-type welding cabin is fully proved.

The invention discloses an environment disturbance plume experiment device and method for deep-sea mining vehicle movement. The device mainly comprises the following three parts: a layered environment water body generation device, a mining vehicle motion simulation system and an environment disturbance plume observation system. The mining vehicle motion simulation system is composed of a mining vehicle model, an electric sliding rail with adjustable motion modes and a double-shaft controller, the double-shaft controller jointly controls the mining vehicle motion simulation sliding rail and the double sliding rails of the environment disturbance plume observation system to move synchronously, and different motion modes are set through motor programs. The mining vehicle is driven to move so as to simulate a disturbance plume development process generated by environment disturbance, and a disturbance plume diffusion process and intensity are recorded by a particle image velocity measurement system, a turbidimeter, a Doppler velocity meter and the like. According to the invention, the environmental disturbance process of the mining vehicle in an actual deep sea environment can be simulated, and a target object and post-processing method under a moving condition observed by using a particle image velocity measurement system is optimized.

The invention provides an underwater plankton sampling method and device, and relates to the technical field of underwater biological sampling, and the technical scheme is characterized in that the method comprises the steps: obtaining the current position information of sampling equipment, the distance information of a next sampling point, and the current water environment parameters; controlling a plurality of adjustable nozzles on the surface of the sampling equipment to carry out washing operation, wherein filtered environmental water is used as a washing medium in the washing operation; according to the distance information, the movement speed of the sampling equipment and the current time, dynamically adjusting the intensity and mode of the scouring operation, so that the intensity of the scouring operation is gradually reduced along with approaching the next sampling point; the scouring effect is monitored in real time, and the scouring strength and mode are adaptively adjusted according to the monitoring result; and the flushing operation is stopped before the sampling equipment reaches the sampling point by a preset distance. The underwater plankton sampling method and device have the advantages that water disturbance is reduced, cross contamination of samples is prevented, and sampling precision and efficiency are improved.

The invention discloses a separation type in-situ observation device capable of continuous penetration and a laying method thereof.The separation type in-situ observation device comprises a supporting system, a penetration system, a separator and a measuring unit, a double-layer penetration module is designed according to the forward and reverse tooth two-way ball screw transmission principle, and continuous laying of a probe rod can be achieved while high-precision penetration laying of the observation probe rod is completed; based on the transmission penetration principle of a ball screw, the requirement for the environment is extremely high, matching between a ball and a screw thread is extremely prone to being interfered by suspended sediment particles in seawater, a telescopic pipe is nested on the periphery of the forward and reverse thread bidirectional ball screw, the sediment particles in an environmental water body can be prevented from being attached to the ball screw, and penetration smoothness of the probe rod is guaranteed; the observation device is designed into an upper frame and a lower frame which are connected by an automatic separator, and the upper frame is separated after the device sits on the bottom and the probe rod penetrates and is arranged, so that the reliability of data and the safety of the device are greatly guaranteed.

The invention relates to the technical field of geological disaster monitoring, in particular to a geological disaster real-time monitoring platform and method based on intelligent AI. The method comprises the following steps: acquiring multi-source monitoring data; analyzing the multi-source monitoring data, and determining the stability of the soil body; determining soil body characteristic parameters based on soil body stability; obtaining environmental hydrological data, and determining a geologic structure dynamic response mode according to the environmental hydrological data; and determining a geological disaster risk level according to the soil body characteristic parameters and the geological structure dynamic response mode. Soil body characteristic parameters are determined, quantitative indexes of building specificity are provided, and customized risk assessment is supported. The method comprises the following steps: acquiring environmental hydrological data, determining a dynamic response mode of a geologic structure according to the environmental hydrological data, capturing real-time behavior characteristics of the geologic structure under environmental change, and identifying a weak area of the geologic structure. And according to the soil body characteristic parameters and the geological structure dynamic response mode, determining the geological disaster risk level, realizing building level early warning, and quantifying the risk evolution rate.

The invention relates to the technical field of water quality detection equipment, and particularly discloses a detection device and method for environmental water quality detection, and the detection device comprises a main body unit, a detection unit, a cleaning unit, a regulation and control unit and a water supply unit; the detection unit is fixedly arranged in the middle of the inner lower wall of the right end of the main body unit, and the cleaning unit is fixedly arranged on the upper wall of the inner left end of the main body unit and is connected with the detection unit in a sealed and inserted mode. Such as extraction, discharge, cleaning and the like, the utilization rate and the flexibility of the equipment are improved; the whole process can be automatically controlled, so that the requirement of manual operation is reduced, and the convenience and efficiency of operation are improved; and a brush on the piston can brush the inner wall of the right end of the liquid pumping cylinder in the moving process, so that the interior of the liquid pumping cylinder is kept clean, pollution is reduced, and the accuracy of water quality detection is improved.

Methods and kits are provided for detecting and quantifying a PFAS compound or a mixture of PFAS compounds in a sample. The method includes the steps of providing a complex of a cyclodextrin and an indicator molecule, contacting the complex with the sample and measuring a parameter of the indicator molecule. The parameter is correlated with an extent of displacement of the reporter molecule from the cyclodextrin and binding of the PFAS compound to the cyclodextrin. This indicates the presence and quantity of the PFAS compound in the sample. The method is useful for monitoring samples such as environmental water samples. The kits include assay solutions for performing the methods and may also include solid-phase extraction matrices for pre-treatment of samples.

The invention discloses a confocal laser microscope detection method for micro-plastic surface biofilm components and biomass, and belongs to the field of micro-plastic pollution monitoring. The method comprises the following steps: carrying out stratified sampling and polymer component identification on micro-plastic in an environmental water body; the method comprises the following steps: marking algae, blue-green algae, bacteria and extracellular polymeric substances in a biological membrane through specific fluorescent staining, carrying out high-resolution three-dimensional imaging by utilizing a confocal laser microscope, and realizing batch quantitative analysis of each component of the biological membrane by adopting ImageJ software. The technical problems that an existing detection method is insufficient in parameter dimension, evaluation result deviation is caused only based on partial component quantification, and the influence of the overall structure of the biological membrane on the micro-plastic migration behavior cannot be truly reflected are solved. According to the method, the biomass and spatial distribution of each component of the biological membrane can be comprehensively and accurately quantified, the accuracy of analyzing the vertical migration mechanism of the micro-plastic is improved, and multi-dimensional data support is provided for ecological risk assessment.

The present invention belongs to the technical field of analysis and detection, and specifically relates to a method and system for rapid detection of iron ions in environmental water. The method of the present invention comprises the following steps: step 1, treating a water sample to be detected with a chemical color development system, causing the chemical color development system to change color, and taking a picture of the chemical color development system; step 2, segmenting a region of interest from the picture; step 3, calculating the change value of each component in the RGB color space and the HSI color space in the region of interest; step 4, using the change value of at least two components obtained in step 3 as a feature, analyzing the content of iron ions in the water sample to be detected by a multivariate regression equation model. The present invention has significant advantages such as low cost, simple operation, high detection efficiency, and strong anti-interference ability, and is suitable for detecting Fe ions in natural water bodies. 3+ The rapid detection of concentration has a good application prospect.

The invention discloses a method for enriching and extracting free glutamic acid from an environmental water body and / or sediment. The method combines freeze drying, mechanical grinding, chemical extraction, cation exchange resin purification and low-temperature concentration. According to the method, the extraction efficiency, the yield and the purity of the free glutamic acid can be remarkably improved, sample background interference and glutamic acid degradation are avoided, and glutamic acid can be separated from other amino acids possibly existing in a sample, so that the purpose of enrichment extraction is achieved. Meanwhile, the method is easy and convenient to operate, efficient in extraction, capable of being used for on-site rapid treatment, wide in raw material source, low in cost and wide in application prospect in the field of environment analysis and ecological monitoring.

The utility model relates to an enhanced denitrification device for a microbial electrolysis constructed wetland. The enhanced denitrification device comprises a constructed wetland system, an electrolysis system and an intelligent control system, the constructed wetland system comprises a water distribution area and a constructed wetland reaction area; a water inlet device is arranged in the water distribution area, and the water distribution area is communicated with the constructed wetland reaction area through the water inlet device; wherein an electrolysis system and an intelligent control system are also arranged in the constructed wetland reaction zone. The device has the advantages that the removal of pollutants, mainly nitrogen, of the constructed wetland is enhanced by mainly utilizing external voltage in the electrolysis system 2, and the water inlet flow, the external voltage and the distance between the electrodes can be adjusted according to the intelligent control system 3, so that the surface hydraulic load of the constructed wetland and the current intensity in the wetland are controlled; and the two systems cooperate to enhance the removal of pollutants, especially nitrogen, of the constructed wetland, so that the pollutants in water are efficiently removed, the water quality of discharged wastewater is improved, and the environmental water quality is improved.

The invention discloses a magnetic limited phosphorus-doped photocatalyst as well as a preparation method and application thereof, and belongs to the field of functional materials for pretreatment of environmental chemical pollutants. The preparation method comprises the following steps: preparing magnetic Fe3O4.TiO2 by adopting a microwave method, and introducing a C18 modified carbon framework material and phosphate ions by taking the magnetic Fe3O4.TiO2 as a matrix to prepare the magnetic limited-access phosphorus-doped photocatalyst. The magnetic limited phosphorus-doped photocatalyst disclosed by the invention has the ultrahigh saturated adsorption capacity of a C18 modified carbon framework material, the instantaneous solid-liquid separation capacity and the efficient photocatalytic degradation capacity of nano titanium dioxide modified magnetic ferroferric oxide and the synergistic photocatalytic performance of phosphate; the problem that a traditional photocatalyst is poor in adsorption capacity is fundamentally solved, and the photocatalyst has more advantages in the aspects of adsorption removal and photocatalytic degradation of bisphenol organic pollutants in an environmental water sample.

The application discloses a complex environment water level monitoring system and method based on heterogeneous light field cooperation, which is characterized in that: a water gauge image is segmented from a water gauge point cloud and a joint external parameter; the water gauge image is further segmented after image enhancement, and the tilted water gauge is corrected; the intensity of the water gauge point cloud is accumulated, and the water level line is obtained through the maximum gradient method; the corrected water gauge image is detected by using a target detection algorithm to detect digital characters, the character recognition algorithm is used to perform OCR recognition on the detected digital characters, and the water level value is calculated according to the digital characters, the water level line and the water gauge image. Through the combination of laser radar and visible light field, the reflection characteristics of different materials are utilized, so that the water level in the complex environment of a river channel, a reservoir and a coast can be monitored in real time. The interference of floating objects and weather factors on water level detection is effectively avoided, and the accuracy and robustness of water level monitoring are significantly improved.

The utility model discloses a water supply selectable water inlet valve structure and a fire fighting truck thereof, and belongs to the technical field of fire fighting equipment. Comprising a valve body, and a group of valve body water inlet connectors and a valve body water outlet connector are formed in the side portion of the valve body. The valve cover is hermetically fixed with the upper opening of the valve body; the valve mechanism is arranged in the valve body cavity, the bottom of the valve mechanism is pivotally supported on the bottom wall of the valve body cavity, the middle part is matched with one side, facing the valve body cavity, of the valve body water inlet interface, and the top is matched with the valve cover; the valve position pivoting switching mechanism is matched with the top of the valve mechanism and is characterized in that the group of valve body water inlet interfaces comprises a water tank left connecting pipe interface formed on the left side of the valve body, a water tank right connecting pipe interface formed on the right side of the valve body, an external environment water source hose left connecting port formed at the left end of the front side of the valve body and an external environment water source hose right connecting port formed at the right end of the front side of the valve body; the valve body water outlet connector is formed in the middle of the rear side of the valve body. The system has the advantages that water in the water tank and external environment such as pond and lake water are shared, and water in the water tank is saved; and the requirement for sufficient water supply on a fire-extinguishing site is met.

This invention belongs to the field of analytical detection technology and relates to a method for detecting estradiol using a combination of organometallic framework enrichment and enzyme-linked immunosorbent assay (ELISA). A magnetic organometallic framework solid-phase extractant is used to enrich estradiol in the sample, followed by detection of the enriched estradiol using ELISA. The magnetic organometallic framework solid-phase extractant is prepared by subjecting mercaptoacetic acid-modified Fe3O4 particles, zirconium salt, and 2-amino-terephthalic acid to a solvothermal reaction at 110–130°C for 22–26 hours. The detection method provided by this invention has advantages such as short detection time, high sensitivity, good specificity, and high accuracy, thereby enabling the detection of trace amounts of estradiol in environmental water samples.