Hydrogeological exploration water source sampling detection device and method thereof

Abstract

This application provides a hydrogeological exploration water source sampling and testing device and method. The device includes: multiple sampling units arranged side-by-side from top to bottom within a pressure-resistant sealed housing, with their sampling ends penetrating the pressure-resistant sealed housing for simultaneous sampling of target water sources at different depths; multiple dosing units corresponding one-to-one with the multiple sampling units, each dosing unit connected to one of its corresponding sampling units via a dosing pipe, and the remaining sampling units connected to the dosing pipe via branch pipes; multiple pulse cleaning detection units corresponding one-to-one with the multiple sampling units; a lifting and traction mechanism connected to the top of the pressure-resistant sealed housing; and a control terminal for controlling the working status and operation of the sampling units, dosing units, pulse cleaning water sample detection units, and lifting mechanism. This application achieves physically isolated fixed-depth sampling, effectively ensuring the authenticity of water quality testing data for each aquifer, enabling explorers to accurately distinguish the water quality conditions of different aquifers.

Description

Technical Field

[0001] This application relates to the field of hydrological sampling technology, and in particular to a hydrogeological exploration water source sampling and testing device and method. Background Technology

[0002] Groundwater sampling and testing is a fundamental procedure in hydrogeological resource assessment, groundwater pollution investigation, and water supply hydrogeological exploration. Current standards include DZ / T 0420-2022 "Technical Specification for Groundwater Sampling," GB / T 50027-2024 "Standard for Water Supply Hydrogeological Exploration," and HJ 164-2020 "Technical Specification for Groundwater Environmental Monitoring." Currently, the mainstream sampling equipment on the market is open-pit fixed-depth water sampler and single-pipeline pump-suction water sampling equipment, accompanied by manual well washing, multiple sampling, laboratory pretreatment, and manual paper-based record keeping. The conventional equipment and operating procedures under the existing standard framework have the following problems: 1) Severe cross-contamination of multiple aquifers: Traditional equipment adopts a through-cavity structure. During the entire process of lowering, suspending and raising the equipment, the upper water body continuously flows back into the target deep aquifer, making it impossible to achieve physical isolation for fixed-depth sampling. This results in distorted aquifer water quality test data and makes it impossible to distinguish the true water quality status of each aquifer. 2) The drawbacks of the national standard fixed-multiple well washing mode are prominent: The standard mandates that water volume of 5 times the well casing volume be extracted for well washing and sampling. For deep wells, dry wells, and low-permeability aquifers, the water consumption is huge, the operation cycle is long, and the well washing qualification depends on manual visual judgment, which has large subjective error and the deviation of parallel samples exceeds the standard. 3) Water samples with multiple detection indicators cannot be stored simultaneously: The preservation agents, light-proof and heat-insulating conditions required for water samples of heavy metals, volatile organic compounds and microorganisms are completely different. Existing technology requires multiple deployments of equipment and batch sampling and dosing, which is inefficient in the field. Multiple transfers will also cause the volatilization of organic matter, the adsorption loss of target components, and the introduction of secondary pollution. 4) Lack of a tamper-proof digital traceability system: Existing regulations only require manual paper records of sampling parameters, without automatic equipment collection and encrypted data storage functions. Key data such as sampling depth, well washing time, and reagent addition can be modified manually, making it impossible to verify the authenticity of samples and failing to meet the compliance requirements of environmental protection supervision and high-precision exploration.

[0003] Based on this, this application proposes a hydrogeological exploration water source sampling and testing device and method. Summary of the Invention

[0004] This application provides a hydrogeological exploration water source sampling and testing device and method to solve the technical problems described in the background art above.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution: In a first aspect, this application provides a hydrogeological exploration water source sampling and testing device, comprising: The pressure-resistant sealed housing and multiple sampling units, multiple dosing units and multiple pulse cleaning detection units disposed within the pressure-resistant sealed housing; Multiple sampling units are arranged side by side inside the pressure-resistant sealed housing, and their sampling ends all penetrate the pressure-resistant sealed housing and are used to sample target water sources at different depths; Each of the multiple dosing units corresponds one-to-one with the multiple sampling units, and each dosing unit is connected to its corresponding sampling unit through a dosing tube for adding detection reagent into the sampling unit; Each of the multiple pulse cleaning detection units corresponds to one of the multiple sampling units, and is used to perform pulse cleaning on the sampling end of each sampling unit and detect the target parameters of the target water source during the cleaning process; A lifting and traction mechanism is connected to the pressure-resistant sealing housing and is used to lift or lower the pressure-resistant sealing housing so that the sampling end of the sampling unit is removed from the liquid surface of the target water source or reaches the target depth of the target water source. A control terminal is installed on the ground near the target water source and is used to control the operation of the sampling unit, the dosing unit, the pulse cleaning detection unit, and the lifting and traction mechanism.

[0006] Optionally, each of the sampling units includes a sample storage tank and a water pump; The sample storage tank is located inside the pressure-resistant sealed housing and is connected to an inlet pipe and a drain pipe. The inlet pipe is equipped with a solenoid valve and its two ends are respectively connected to the outlet of the water pump and pass through the outside of the pressure-resistant sealed housing. The end of the drain pipe away from the sample storage tank passes through the outside of the pressure-resistant sealed housing and is equipped with a drain valve. Both the solenoid valve and the drain valve are electrically connected to the control terminal.

[0007] Optionally, the sample storage tank is equipped with a stirring unit for mixing the water sample and the detection reagent entering it.

[0008] Optionally, both the solenoid valve and the drain valve are fitted with a protective cover to prevent mud and sand from entering.

[0009] Optionally, each of the dosing units includes a reagent storage tank and a power pump; The drug storage tank is installed inside the pressure-resistant sealed shell, and a liquid level sensor electrically connected to the control terminal is installed inside it. The power pump is installed on the pipe of the dosing pipe near the drug storage tank. The dosing tube is equipped with a flow valve that is electrically connected to the control terminal.

[0010] Optionally, each of the pulse cleaning detection units includes a ring-shaped water pipe and a detection host; The annular water pipe is arranged around the sampling end of the sampling unit, and is connected to a cleaning pipe for pulse cleaning of the sampling end of the sampling unit and a pumping pipe for providing cleaning water. The bottom end of the pumping pipe is flush with the sampling end of the sampling unit and is equipped with a pulse pump. The detection host is located at the bottom of the pressure-resistant sealing housing, and the detection probe electrically connected to it passes through the outside of the pressure-resistant sealing housing and is flush with the sampling end of the sampling unit. Both the pulse pump and the detection host are electrically connected to the control terminal.

[0011] Optionally, the lifting traction mechanism is integrated with an encoder for positioning the lifting height of the lifting traction mechanism; The encoder is electrically connected to the control terminal.

[0012] Secondly, this application provides a method for sampling and detecting water sources in hydrogeological exploration, applied to the hydrogeological exploration water source sampling and detection device described in any of the above claims, the method comprising: Select a target water source, input the water source parameter values ​​of the target water source into the control terminal, the control terminal matches the water source parameter values ​​with its historical data and provides the sampling and detection parameter values ​​of the target water source; The pressure-resistant sealing shell is lowered to the target depth in the target water source by the lifting and traction mechanism. The pulse cleaning and detection unit is activated and the sampling end of the water inlet pipe is flushed by the pulse cleaning and detection unit. During this process, the turbidity and conductivity of the water sample at the target depth of the target water source are collected in real time by the pulse cleaning and detection unit. The comprehensive water quality stability coefficient is calculated based on the turbidity and conductivity, and the pulse cleaning detection unit is turned off when the value of the comprehensive water quality stability coefficient is less than the preset threshold at every moment within the preset time period. Based on the value of the sampling and detection parameters, the sampling unit is activated and a water sample of the target volume is obtained from each storage tank. According to the sampled and tested parameter values, the dosing unit is started and a preset amount of test reagent is added to the corresponding sample storage tank. The water sample and the test reagent in the sample storage tank are mixed by the stirring unit. The comprehensive water quality stability coefficient is recorded through the control terminal, and the comprehensive water quality stability coefficient is encrypted and stored to generate a traceability QR code; The pressure-resistant sealing shell is lifted to the ground by the lifting and traction mechanism, the pressure-resistant sealing shell is opened and the multiple sample storage tanks inside are disassembled in sequence, and the traceability QR code corresponding to each sample storage tank is affixed to the sample storage tank and sent for testing.

[0013] The comprehensive water quality stability coefficient is calculated based on the turbidity and conductivity, as follows: , in, To calculate the comprehensive water quality stability coefficient, for Turbidity detection value at any time The average turbidity over a preset time period. for Conductivity measurement value at any time The average conductivity over a preset time period.

[0014] Optionally, the preset time period is 28s-32s; The preset threshold is 0.45%-0.6%.

[0015] 1) The hydrogeological exploration water source sampling and testing device provided in this application, firstly, employs a structural layout in which multiple sampling units are arranged side-by-side within the same pressure-resistant sealed housing. Each sampling unit's sampling end independently penetrates the housing and corresponds to a target water source at a different depth. This allows for simultaneous contact with multiple target aquifers during a single deployment. Each sampling end is independent and not interconnected, fundamentally avoiding the problem of continuous backflow and mixing of upper-layer water into the target deep aquifers, as is common in traditional through-cavity structures. This achieves physically isolated, fixed-depth sampling, effectively ensuring the authenticity and independence of water quality testing data for each aquifer, enabling surveyors to accurately distinguish the water quality conditions of different aquifers. Secondly, multiple dosing units are set up, each corresponding to one of the sampling units. This allows for the immediate addition of appropriate testing reagents to each sample storage tank after sampling, eliminating the need for multiple deployments and batch sampling and dosing as required by existing technologies. Water sample preservation agents required for different detection indicators such as heavy metals, volatile organic compounds, and microorganisms can be added simultaneously in the same operation process, significantly improving the efficiency of field operations. This avoids the problems of organic matter volatilization, target component adsorption loss, and secondary pollution caused by multiple water sample transfers, ensuring the timeliness and standardization of water sample preservation. Furthermore, multiple pulse cleaning and detection units, each corresponding to one of the sampling units, are set up to detect the target parameters of the target water source while performing pulse cleaning at the sampling end. This integrated cleaning and detection design provides the hardware foundation for replacing traditional manual visual determination of the well-washing endpoint. It allows the well-washing process to be judged based on real-time acquired quantitative data, overcoming the drawbacks of the national standard fixed-multiplier well-washing mode, such as huge water consumption, long operation cycle, large subjective error, and excessive deviation of parallel samples. It is particularly suitable for sampling operations in deep wells, dry wells, and low-permeability aquifers. Throughout the sampling process, the connection design between the lifting and traction mechanism and the pressure-resistant sealed shell enables the device to be precisely lowered to the target depth or raised to the ground. Combined with the coordinated operation of the aforementioned units, a complete operational chain is formed, from lowering and positioning, pulse cleaning, quantitative detection, depth sampling to simultaneous chemical dosing. This significantly improves the automation level and operational reliability of hydrogeological exploration water source sampling and testing. Simultaneously, the operation of the sampling unit, chemical dosing unit, pulse cleaning and detection unit, and lifting mechanism is controlled by a control terminal, achieving precise control of sampling, chemical dosing, pulse sampling and detection, and the lifting of the pressure-resistant sealed shell, ensuring the reliability of the sampling process.

[0016] 2) The hydrogeological exploration water source sampling and testing method provided in this application first inputs the water source parameter values ​​of the target water source into the control terminal. The control terminal then matches these values ​​with internal historical data and provides the parameter values ​​to be sampled and tested. This changes the traditional extensive mode of relying on experience-based judgment or standardized operations, allowing key parameters such as sampling volume, type and dosage of testing reagents, and target depth to be intelligently optimized based on the historical characteristics of the specific water source. This avoids resource waste and data deviation caused by blind operation, improving the accuracy and repeatability of hydrogeological exploration. Secondly, the method uses a lifting and traction mechanism to lower the pressure-resistant sealed shell to the target depth in the target water source, ensuring that the sampling ends of each sampling unit are precisely positioned at different aquifer levels. The subsequent activation of the pulse cleaning and testing unit flushes the sampling end of the inlet pipe, effectively removing foreign matter and residual water that may have adhered to the pipe wall during the lowering process. This ensures that the water sample entering the storage tank truly reflects the aquifer water quality at the target depth, achieving true fixed-depth sampling and inter-layer isolation. Furthermore, this method proposes a quantitative well-washing judgment mechanism based on a comprehensive water quality stability coefficient. Specifically, during pulse cleaning, the pulse cleaning detection unit collects the turbidity and conductivity of the water sample at the target depth in real time and calculates the comprehensive water quality stability coefficient accordingly. Only when the value of this coefficient is less than a preset threshold at every moment within a preset time period is the pulse cleaning detection unit shut down and the sampling phase begins. This judgment logic uses the continuous stability of water quality parameters as the standard for well-washing completion, completely replacing the traditional fixed-multiple extraction mode of 5 times the well casing volume. This significantly reduces the water consumption and operation cycle for well-washing in deep wells, dry wells, and low-permeability aquifers, while eliminating subjective errors from manual visual judgment, effectively controlling the deviation of parallel samples, and significantly improving well-washing efficiency and data reliability. Simultaneously, this method activates the sampling unit based on the value of the parameters to be sampled, obtaining a target volume of water sample into each sample tank. Then, the dosing unit is activated to add a preset amount of detection reagent to the corresponding sample tank, and the mixture is homogenized by the stirring unit. The entire process can be completed in a single deployment operation. Water samples with different detection indicators, such as heavy metals, volatile organic compounds, and microorganisms, can be simultaneously acquired and stored immediately, eliminating the need for multiple equipment deployments and batch operations. This not only greatly improves the efficiency of field operations but also avoids the risks of organic matter volatilization, target component adsorption loss, and secondary pollution during multiple transfers, ensuring the representativeness and preservation effectiveness of water samples for each indicator. Finally, the method automatically records the comprehensive water quality stability coefficient through a control terminal and encrypts and stores it to generate a traceability QR code. The QR code is then affixed to the corresponding sample storage tank for testing. This process achieves automatic acquisition, encryption protection, and visual traceability of key data such as sampling depth, well washing time, water quality stability coefficient, and reagent dosage. It eliminates the risk of data tampering that may exist in manual paper records, providing a rigid technical guarantee for sample authenticity and fully meeting the requirements of environmental supervision and high-precision exploration. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A top view of the internal structure of the pressure-resistant sealed housing of a hydrogeological exploration water source sampling and testing device provided in an embodiment of this application; Figure 2 A schematic diagram of a sample storage tank equipped with a stirring unit is provided in an embodiment of this application; Figure 3 A schematic diagram of a structure in which a ring-shaped water pipe is provided at the sampling end of a water inlet pipe according to an embodiment of this application; Figure 4 A schematic diagram of a structure in which a pumping pipe is connected to an annular water pipe according to an embodiment of this application; Figure 5 This is a schematic diagram showing the electrical connection between the control terminal and various mechanical components provided in an embodiment of this application.

[0019] In the diagram: 100, pressure-resistant sealed housing; 200, sampling unit; 201, sample storage tank; 2011, water inlet pipe; 2012, drain pipe; 2013, solenoid valve; 2014, drain valve; 2015, stirring unit; 2016, anti-sand protection cover; 202, water pump; 300, dosing unit; 301, chemical storage tank; 3011, level sensor; 302, power pump; 400, pulse cleaning detection unit; 401, ring water pipe; 4011, cleaning pipe; 4012, pumping pipe; 4013, pulse pump; 402, detection host; 4021, detection probe; 500, dosing pipe; 501, flow valve; 600, lifting and traction mechanism; 601, encoder; 700, control terminal. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0021] Firstly, reference Figures 1 to 5 This application provides a hydrogeological exploration water source sampling and testing device, comprising: The pressure-resistant sealed housing 100 includes multiple sampling units 200, multiple dosing units 300, and multiple pulse cleaning and detection units 400 disposed within the pressure-resistant sealed housing 100. The pressure-resistant sealed housing 100 is provided with a sealing door, which allows for the installation or removal of the sampling units 200 and the dosing units 300.

[0022] Multiple sampling units 200 are arranged in parallel inside the pressure-resistant sealed housing 100, and their sampling ends all penetrate through the pressure-resistant sealed housing 100 and are used to sample the target water source at the same depth. This enables the collection of multiple water samples from the target water source at the same depth, and the multiple water samples can be used for parallel experiments, etc.

[0023] Multiple dosing units 300 correspond one-to-one with multiple sampling units 200, and each dosing unit 300 is connected to its corresponding sampling unit 200 through a dosing tube 500 for adding detection reagents into the sampling unit 200. The detection reagents added to the multiple dosing units 300 are of different types, and can be water sample preservation reagents required for different detection indicators such as heavy metals, volatile organic compounds, and microorganisms. This enables the collection of multiple water quality parameters of the target water source at a unified depth, so as to comprehensively understand the water quality of the target water source at that depth.

[0024] Multiple pulse cleaning detection units 400 correspond one-to-one with multiple sampling units 200, and are used to perform pulse cleaning on the sampling end of each sampling unit 200 and detect the target parameters of the target water source during the cleaning process. The pulse cleaning detection units 400 perform pulse cleaning on the sampling end of the sampling unit 200 to prevent impurities from entering the water sample and affecting the water quality detection results, while the target parameters can be used as a basis for determining whether the sampling unit needs to be rinsed again.

[0025] A lifting and traction mechanism 600 is connected to a pressure-resistant sealed housing 100. This mechanism is used to lift or lower the pressure-resistant sealed housing 100 so that the sampling end of the sampling unit 200 is removed from the surface of the target water source or reaches the target depth. Throughout the sampling process, the connection between the lifting and traction mechanism 600 and the pressure-resistant sealed housing 100 allows for precise lowering to the target depth or lifting to the ground. Combined with the coordinated operation of the aforementioned units, a complete operational chain is formed, from lowering and positioning, pulse cleaning, quantitative detection, fixed-depth sampling to simultaneous chemical dosing. This significantly improves the automation level and operational reliability of water source sampling and testing in hydrogeological exploration. Furthermore, the lifting and traction mechanism 600 can be a hydraulic lifting device composed of a hydraulic pump station, hydraulic cylinders or hydraulic motors, and a chain or wire rope transmission mechanism.

[0026] The control terminal 700 is located on the ground near the target water source and is used to control the operation of the sampling unit 200, the dosing unit 300, the pulse cleaning detection unit 400, and the lifting and traction mechanism 600.

[0027] The hydrogeological exploration water source sampling and testing device provided in this application, firstly, employs a structural layout where multiple sampling units 200 are arranged side-by-side within the same pressure-resistant sealed housing 100. Each sampling unit 200's sampling end independently penetrates the pressure-resistant sealed housing 100 and corresponds to a target water source at a different depth. This allows for simultaneous contact with multiple target aquifers during a single deployment. The sampling ends are independent and not interconnected, fundamentally avoiding the problem of continuous backflow and mixing of upper-layer water into the target deep aquifers, as is common in traditional through-cavity structures. This achieves physically isolated, fixed-depth sampling, effectively ensuring the authenticity and independence of water quality testing data for each aquifer, enabling surveyors to accurately distinguish the water quality conditions of different aquifers. Secondly, multiple dosing units 300, each corresponding to one of the sampling units 200, are provided. This allows for the immediate addition of appropriate testing reagents to each sampling unit 200 after sampling, eliminating the need for multiple deployments and batch sampling and dosing as required by existing technologies. Water sample preservation agents required for different detection indicators such as heavy metals, volatile organic compounds, and microorganisms can be added simultaneously in the same operation process, significantly improving the efficiency of field operations. This avoids the problems of organic matter volatilization, target component adsorption loss, and secondary pollution caused by multiple water sample transfers, ensuring the timeliness and standardization of water sample preservation. Furthermore, multiple pulse cleaning and detection units 400, corresponding one-to-one with multiple sampling units 200, can detect target parameters of the target water source while performing pulse cleaning at the sampling end. This integrated cleaning and detection design provides the hardware foundation for replacing traditional manual visual determination of the well-washing endpoint. It allows the well-washing process to be judged based on real-time acquired quantitative data, overcoming the drawbacks of the national standard fixed-multiplier well-washing mode, such as huge water consumption, long operation cycle, large subjective error, and excessive deviation of parallel samples. It is particularly suitable for sampling operations in deep wells, dry wells, and low-permeability aquifers. Finally, the operation of the sampling unit 200, the dosing unit 300, the pulse cleaning and detection unit 400 and the lifting and traction mechanism 600 are controlled by the control terminal 700, so as to achieve precise control of the sampling, dosing, pulse sampling and detection and the lifting and lowering process of the pressure-resistant sealing shell 100, and ensure the reliability of the sampling process.

[0028] In some embodiments, reference Figure 1Each sampling unit 200 in this application includes a sample storage tank 201 and a water pump 202. Specifically, the sample storage tank 201 is disposed inside a pressure-resistant sealed housing 100 and is connected to an inlet pipe 2011 and a drain pipe 2012. The inlet pipe 2011 is equipped with a solenoid valve 2013, and its two ends are respectively connected to the outlet of the water pump 202 and penetrate the outside of the pressure-resistant sealed housing 100. The drain pipe 2012, with one end away from the sample storage tank 201, penetrates the outside of the pressure-resistant sealed housing 100 and is equipped with a drain valve 2014. The solenoid valve 2013 and the drain valve 2014 are both electrically connected to the control terminal 700.

[0029] In the above embodiments, by connecting the inlet pipe 2011 and the outlet pipe 2012 to the sample storage tank 201, and installing a water pump 202 connected to the inlet pipe 2011 inside the sample storage tank 201, the extraction and discharge of water samples can be achieved electronically without manual intervention. Specifically, when the sampling end of the inlet pipe 2011 is lowered to the target depth, the control terminal 700 can instruct the solenoid valve 2013 to open and the water pump 202 to start, accurately extracting the target water sample into the sample storage tank 201; after sampling is completed or when it is necessary to change the sampling level, the control terminal 700 can instruct the drain valve 2014 to open, discharging the residual water or previous cleaning wastewater from the sample storage tank 201. This combination of electrically controlled valve and water pump 202 not only improves the accuracy and repeatability of sampling operations, but also avoids the problems of difficult operation and poor sealing of traditional manual valves in deep water and high-pressure environments. At the same time, it enables each sampling unit 200 to operate independently without interfering with each other, further ensuring the reliability of multi-layer fixed-depth sampling.

[0030] In some embodiments, reference Figure 2 The sample storage tank 201 in this application is equipped with a stirring unit 2015 for mixing the water sample and the detection reagent entering it. The stirring unit 2015 can be a stirring shaft that penetrates and extends into the sample storage tank 201. The stirring shaft is rotatably connected to the sample storage tank and is equipped with stirring blades. The stirring shaft is driven by a drive motor. This is only one structural form of the stirring unit 2015, and its purpose is to achieve mixing of the water sample and the detection reagent entering it.

[0031] In the above embodiments, the stirring unit 2015 ensures that the water sample and the detection reagent can fully contact and mix evenly in a closed environment, avoiding problems such as the release of volatile organic compounds, the entry of external pollutants, and temperature fluctuations caused by stirring with the lid open, effectively ensuring the standardization of water sample preservation and the accuracy of detection results.

[0032] In some embodiments, reference Figure 1 In this application, both the solenoid valve 2013 and the drain valve 2014 are fitted with anti-mud and sand protective covers 2016.

[0033] In the above embodiments, during the lowering, hovering, and lifting of the pressure-resistant sealing housing 100, by installing anti-mud and sand protective covers 2016 on both the solenoid valve 2013 and the drain valve 2014, a physical barrier can be formed outside the valve to prevent large particles of mud and sand from directly impacting the valve body, while allowing water to flow normally to complete the sampling and draining functions. This improves the environmental adaptability and operational stability of this application under harsh hydrogeological conditions, reduces the frequency of operation interruptions and equipment maintenance caused by valve failure, extends the service life of key components, and ensures the reliability of continuous field operations.

[0034] In some embodiments, reference Figure 1 Each dosing unit 300 in this application includes a reagent storage tank 301 and a power pump 302. Specifically, the reagent storage tank 301 is disposed inside a pressure-resistant sealed housing 100, and a liquid level sensor 3011 electrically connected to a control terminal 700 is disposed therein. The power pump 302 is disposed on the dosing pipe near the reagent storage tank 301. A flow valve 501 electrically connected to the control terminal 700 is disposed on the dosing pipe 500 near the sampling unit 200.

[0035] In the above embodiment, the power pump 302 is turned on, allowing the detection reagent in the reagent storage tank 301 to enter the sampling unit 200 connected to it via the dosing tank 301. During this process, the flow rate and total amount of reagent are precisely controlled by the flow valve 501, achieving accurate matching of the types and amounts of reagents required for different detection indicators. In addition, the liquid level sensor 3011 monitors the remaining reagent level in the reagent storage tank 301 in real time. When the liquid level is lower than the safety threshold, an early warning is promptly issued to the control terminal 700 to prevent dosage deviations and sample preservation failures due to insufficient reagent. Therefore, the setup of the reagent storage tank 301, power pump 302, liquid level sensor 3011, and flow valve 501 achieves accurate metering and intelligent monitoring of the dosing process.

[0036] In some embodiments, reference Figure 1 , Figure 3 and Figure 4 Each pulse cleaning detection unit 400 in this application includes an annular water pipe 401 and a detection host 402. Specifically, the annular water pipe 401 is arranged around the sampling end of the sampling unit 200, and is connected to a cleaning pipe 4011 for pulse cleaning of the sampling end of the sampling unit 200 and a pumping pipe 4012 for providing cleaning water. The bottom end of the pumping pipe 4012 is flush with the sampling end of the sampling unit 200 and is equipped with a pulse pump 4013. The detection host 402 is located at the bottom of the pressure-resistant sealed housing 100, and the detection probe 402 electrically connected to it penetrates the outside of the pressure-resistant sealed housing 100 and is flush with the sampling end of the sampling unit 200. The pulse pump 4013 and the detection host 402 are both electrically connected to the control terminal 700.

[0037] In the above embodiments, the arrangement of the annular water pipe 401, cleaning pipe 4011, pumping pipe 4012, pulse pump 4013, detection host 402, and detection probe 4021 forms a highly efficient and coordinated cleaning and detection system surrounding the sampling end of the sampling unit 200. Specifically, the annular water pipe 401 is arranged around the sampling end of the sampling unit 200, allowing the cleaning water flow to uniformly cover the outer wall and surrounding area of ​​the sampling end of the sampling unit 200 in a 360° manner, thoroughly removing the mud, biofilm, and residual water adhering during the descent process, achieving a comprehensive and thorough cleaning effect. The bottom end of the pumping pipe 4012 is flush with the sampling end of the sampling unit 200 and is equipped with the pulse pump 4013, ensuring that the cleaning water source is taken from the same depth layer as the target water sample, avoiding secondary pollution caused by introducing water from different layers. Simultaneously, the pulsed water flow generated by the pulse pump 4013 has a strong scouring and stripping ability, effectively loosening and removing stubborn deposits.

[0038] In addition, the detection host 402 is located at the bottom of the pressure-resistant sealed housing 100, and its electrically connected detection probe 4021 penetrates the outside of the pressure-resistant sealed housing 100 and is flush with the sampling end of the sampling unit 200. This allows the detection probe 4021 to directly sense the actual water quality at the target depth after pulse cleaning, collect target parameters (such as turbidity, conductivity, etc.) in real time, and transmit them to the detection host 402 for analysis and processing. Both the pulse pump 4013 and the detection host 402 are electrically connected to the control terminal 700, realizing the linkage control of cleaning intensity, cleaning duration, and detection judgment. When the detection parameters reach a stable standard, the cleaning is automatically terminated and the sampling process begins. This integrated structure design of cleaning, detection, and control transforms the well cleaning process from traditional experience-driven to data-driven, significantly improving operational efficiency and judgment accuracy.

[0039] In some embodiments, the lifting traction mechanism 600 of this application is integrated with an encoder 601 for positioning the lifting height of the lifting traction mechanism 600; wherein the encoder 601 is electrically connected to the control terminal 700.

[0040] In the above embodiments, the encoder 601 continuously collects the operating displacement data of the lifting traction mechanism 600 and converts it into an electrical signal to be transmitted to the control terminal 700, so that the control terminal 700 can accurately grasp the real-time depth position of the device in the well or borehole, thereby realizing precise quantitative monitoring and real-time feedback of the lowering and lifting height of the pressure-resistant sealing shell 100.

[0041] Secondly, this application provides a method for sampling and detecting water sources in hydrogeological exploration, applied to the hydrogeological exploration water source sampling and detection device described in any of the above claims, the method comprising: S801. Select the target water source and input the water source parameter values ​​of the target water source into the control terminal 700. The control terminal 700 matches the water source parameter values ​​with its historical data and provides the sampling and testing parameter values ​​of the target water source. Among them, the water source parameters can be the water intake depth and water quality survey parameters of the target water source, the historical data includes the water quality parameters to be surveyed at different sampling depths, and the sampling and testing parameter values ​​can be parameters such as the type of reagent and the amount of reagent added.

[0042] S802. The pressure-resistant sealing housing 100 is lowered to the target depth in the target water source by the lifting and traction mechanism 600. The pulse cleaning and detection unit 400 is activated and the sampling end of the water inlet pipe is flushed by the pulse cleaning and detection unit 400. During this process, the turbidity and conductivity of the water sample at the target depth of the target water source are collected in real time by the pulse cleaning and detection unit 400. The target depth can be set according to the actual test needs. Taking a target water source with a depth of 120 meters as an example, it can be divided into: 20m shallow layer, 60m middle layer, and 100m deep layer.

[0043] S803. Calculate the comprehensive water quality stability coefficient based on turbidity and conductivity. When the value of the comprehensive water quality stability coefficient is less than the preset threshold at every moment within the preset time period, shut down the pulse cleaning detection unit 400. The preset time period is 28s-32s. The preset threshold is 0.45%-0.6%.

[0044] S804. Based on the value of the parameter to be sampled and detected, the sampling unit 200 is started and a water sample of the target volume is obtained from each sample storage tank 201; wherein, the target volume depends on the volume of the oxygen storage tank 201, and this application does not specifically limit it.

[0045] S805. Based on the parameter values ​​to be sampled and tested, start the dosing unit 300 and add a preset amount of testing reagent to the corresponding sample storage tank 201. Then, use the stirring unit 2015 to mix the water sample and testing reagent in the sample storage tank 201 to ensure the accuracy of the water quality test results.

[0046] S806. Record the comprehensive water quality stability coefficient through the control terminal 700, and encrypt and store the comprehensive water quality stability coefficient to generate a traceability QR code; wherein, the comprehensive water quality stability coefficient is calculated based on turbidity and conductivity, and the specific calculation is as follows: , in, To calculate the comprehensive water quality stability coefficient, for Turbidity detection value at any time The average turbidity over a preset time period. for The conductivity value at any given time is the average conductivity value within a preset time period.

[0047] S807. Lift the pressure-resistant sealing shell 100 to the ground using the lifting and traction mechanism 600, open the pressure-resistant sealing shell 100 and disassemble the multiple sample storage tanks 201 inside in sequence, then attach the traceability QR code corresponding to each sample storage tank 201 to the sample storage tank 201 and send it for inspection.

[0048] The hydrogeological exploration water source sampling and testing method provided in this application first inputs the water source parameter values ​​of the target water source into the control terminal 700. The control terminal 700 then matches these values ​​with internal historical data and provides the parameter values ​​to be sampled and tested. This changes the extensive mode of relying on experience-based judgment or uniform standard operation in traditional operations, allowing key parameters such as sampling volume, type and dosage of testing reagents, and target depth to be intelligently optimized according to the historical characteristics of the specific water source. This avoids resource waste and data deviation caused by blind operation and improves the accuracy and repeatability of hydrogeological exploration. Secondly, the method uses a lifting and traction mechanism 600 to lower the pressure-resistant sealing shell 100 to the target depth in the target water source, so that the sampling ends of each sampling unit 200 are accurately positioned at different aquifers. In conjunction with the subsequent activation of the pulse cleaning detection unit 400, the sampling end of the inlet pipe 2011 is flushed, effectively removing foreign matter and residual water that may have adhered to the pipe wall during the lowering process. This ensures that the water sample entering the storage tank 201 truly reflects the aquifer water quality at the target depth, achieving true fixed-depth sampling and inter-layer isolation. Furthermore, this method proposes a quantitative well-washing judgment mechanism based on a comprehensive water quality stability coefficient. Specifically, during the pulse cleaning process, the pulse cleaning detection unit 400 collects the turbidity and conductivity of the water sample at the target depth in real time and calculates the comprehensive water quality stability coefficient accordingly. The pulse cleaning detection unit 400 is shut down and sampling begins only when the value of the coefficient is less than the preset threshold at every moment within a preset time period. This judgment logic uses the continuous stability of water quality parameters as the standard for well cleaning completion, completely replacing the traditional fixed multiple mode of extracting 5 times the well casing volume. This significantly reduces the water consumption and operation cycle for cleaning deep wells, dry wells, and low-permeability aquifers, while eliminating subjective errors from manual visual judgment, effectively controlling the deviation of parallel samples, and significantly improving well cleaning efficiency and data reliability. Simultaneously, this method activates the sampling unit based on the value of the parameter to be sampled, obtaining a target volume of water sample into each sample tank 201. Then, the dosing unit 300 is activated to add a preset amount of detection reagent to the corresponding sample tank 201, and the mixture is homogenized by the stirring unit 2015. The entire process can be completed in a single deployment operation. Water samples with different detection indicators such as heavy metals, volatile organic compounds, and microorganisms can be simultaneously acquired and stored immediately, eliminating the need for multiple equipment deployments and batch operations. This not only greatly improves the efficiency of field operations, but also avoids the risks of organic matter volatilization, target component adsorption loss, and secondary pollution during multiple transfers, ensuring the representativeness and preservation effectiveness of water samples for each indicator. Finally, the method automatically records the comprehensive water quality stability coefficient through the control terminal 700, and encrypts and stores it to generate a traceability QR code. The QR code is then affixed to the corresponding sample storage tank 201 for testing.This process enables the automatic collection, encryption protection, and visual traceability of key data such as sampling depth, well washing time, water quality stability coefficient, and reagent dosage. It eliminates the risk of data tampering that may exist in manual paper records, and provides a rigid technical guarantee for the authenticity of samples, fully meeting the requirements of environmental protection supervision and high-precision exploration.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A water source sampling and testing device for hydrogeological exploration, characterized in that, include: The pressure-resistant sealed housing (100) and a plurality of sampling units (200), a plurality of dosing units (300) and a plurality of pulse cleaning detection units (400) disposed within the pressure-resistant sealed housing (100); Multiple sampling units (200) are arranged side by side inside the pressure-resistant sealed housing (100), and their sampling ends all penetrate the pressure-resistant sealed housing (100) and are used to sample the target water source at the same depth; Each of the multiple dosing units (300) corresponds one-to-one with the multiple sampling units (200), and each dosing unit (300) is connected to the corresponding sampling unit (200) through a dosing tube (500) for adding detection reagent into the sampling unit (200); The multiple pulse cleaning detection units (400) correspond one-to-one with the multiple sampling units (200), and are used to perform pulse cleaning on the sampling end of each sampling unit (200) and detect the target parameters of the target water source during the cleaning process; A lifting and traction mechanism (600) is connected to the pressure-resistant sealing housing (100) and is used to lift or lower the pressure-resistant sealing housing (100) so that the sampling end of the sampling unit is removed from the liquid surface of the target water source or reaches the target depth of the target water source. A control terminal (700) is located on the ground near the target water source and is used to control the operation of the sampling unit (200), the dosing unit (300), the pulse cleaning detection unit (400), and the lifting and traction mechanism (600).

2. The hydrogeological exploration water source sampling and testing device according to claim 1, characterized in that, Each of the sampling units (200) includes a sample storage tank (201) and a water pump (202); The sample storage tank (201) is located inside the pressure-resistant sealing shell (100) and is connected to an inlet pipe (2011) and a drain pipe (2012). The inlet pipe (2011) is equipped with a solenoid valve (2013) and its two ends are respectively connected to the outlet of the water pump (202) and pass through the outside of the pressure-resistant sealing shell (100). The drain pipe (2012) has one end away from the sample storage tank (201) that passes through the outside of the pressure-resistant sealing shell (100) and is equipped with a drain valve (2014). The solenoid valve (2013) and the drain valve (2014) are both electrically connected to the control terminal (700).

3. The hydrogeological exploration water source sampling and testing device according to claim 2, characterized in that, The sample storage tank (201) is equipped with a stirring unit (2015) for mixing the water sample and the detection reagent that enter it.

4. The hydrogeological exploration water source sampling and testing device according to claim 2, characterized in that, Both the solenoid valve (2013) and the drain valve (2014) are fitted with anti-mud and sand protective covers (2016).

5. The hydrogeological exploration water source sampling and testing device according to claim 1, characterized in that, Each of the dosing units (300) includes a chemical storage tank (301) and a power pump (302); The drug storage tank (301) is located inside the pressure-resistant sealed housing (100), and a liquid level sensor (3011) electrically connected to the control terminal (700) is installed inside it. The power pump (302) is located on the pipe of the dosing pipe (500) near the drug storage tank (301). The dosing tube (500) is equipped with a flow valve (501) that is electrically connected to the control terminal (700) on the tube body near the sampling unit (200).

6. The hydrogeological exploration water source sampling and testing device according to claim 1, characterized in that, Each of the pulse cleaning detection units (400) includes a ring water pipe (401) and a detection host (402). The annular water pipe (401) is arranged around the sampling end of the sampling unit (200), and is connected to a cleaning pipe (4011) for pulse cleaning of the sampling end of the sampling unit (200) and a pumping pipe (4012) for providing cleaning water. The bottom end of the pumping pipe (4012) is flush with the sampling end of the sampling unit (200) and is equipped with a pulse pump (4013). The detection host (402) is located at the inner bottom of the pressure-resistant sealing housing (100), and the detection probe (4021) electrically connected to it penetrates the outside of the pressure-resistant sealing housing (100) and is flush with the sampling end of the sampling unit (200). The pulse pump (4013) and the detection host (402) are both electrically connected to the control terminal (700).

7. The hydrogeological exploration water source sampling and detection device according to any one of claims 1 to 6, characterized in that, The lifting traction mechanism (600) is integrated with an encoder (601) for positioning the lifting height of the lifting traction mechanism (600). The encoder (601) is electrically connected to the control terminal (700).

8. A method for sampling and testing water sources in hydrogeological exploration, characterized in that, The method, applied to the hydrogeological exploration water source sampling and detection device according to any one of claims 1 to 7, comprises: Select a target water source, input the water source parameter values ​​of the target water source into the control terminal, the control terminal matches the water source parameter values ​​with its historical data and provides the sampling and detection parameter values ​​of the target water source; The pressure-resistant sealing shell is lowered to the target depth in the target water source by the lifting and traction mechanism. The pulse cleaning and detection unit is activated and the sampling end of the water inlet pipe is flushed by the pulse cleaning and detection unit. During this process, the turbidity and conductivity of the water sample at the target depth of the target water source are collected in real time by the pulse cleaning and detection unit. The comprehensive water quality stability coefficient is calculated based on the turbidity and conductivity, and the pulse cleaning detection unit is turned off when the value of the comprehensive water quality stability coefficient is less than the preset threshold at every moment within the preset time period. Based on the value of the sampling and detection parameters, the sampling unit is activated and a water sample of the target volume is obtained from each storage tank. According to the sampled and tested parameter values, the dosing unit is started and a preset amount of test reagent is added to the corresponding sample storage tank. The water sample and the test reagent in the sample storage tank are mixed by the stirring unit. The comprehensive water quality stability coefficient is recorded through the control terminal, and the comprehensive water quality stability coefficient is encrypted and stored to generate a traceability QR code; The pressure-resistant sealing shell is lifted to the ground by the lifting and traction mechanism, the pressure-resistant sealing shell is opened and the multiple sample storage tanks inside are disassembled in sequence, and the traceability QR code corresponding to each sample storage tank is affixed to the sample storage tank and sent for testing.

9. The method for sampling and testing water sources in hydrogeological exploration according to claim 8, characterized in that, The comprehensive water quality stability coefficient is calculated based on the turbidity and conductivity, as follows: ， in, To calculate the comprehensive water quality stability coefficient, for Turbidity detection value at any time The average turbidity over a preset time period. for Conductivity measurement value at any time The average conductivity over a preset time period.

10. The method for sampling and testing water sources in hydrogeological exploration according to claim 8, characterized in that, The preset time period is 28s-32s; The preset threshold is 0.45%-0.6%.

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