191 results about "Groundwater sampling" patented technology

The present invention belongs to the technical field of groundwater sampling, and in particular to a groundwater sampling device. In view of the technical problem that, during existing manual groundwater sampling, groundwater is completely exposed to the air, and the water sample is easily polluted by the environment or wind, resulting in inaccurate water sample results, the following solution is proposed, which includes a sampling part, a sample storage part and a control part. The present invention directly samples the water sample in a tube body and directly stores the water sample to obtain a sample, which can avoid the accidental secondary contamination of the water sample during manual operation and ensure the accuracy of the sample detection parameters.

The invention relates to the technical field of water quality monitoring, in particular to a distributed raw water quality real-time monitoring system which comprises an underground water sampling module, a sample analysis module, a water quality feedback terminal and a data storage terminal. And finally, the water body quality corresponding to the underground water quality in the target raw water body area is fed back to a system interface for interface display, the water quality evaluation can guarantee the safety and sustainability of the water resource, and the water quality evaluation efficiency is improved. Health risks and economic losses caused by water quality pollution are avoided, and underground water quality evaluation has direct influence on public health. Various health problems may be caused by drinking or using the water for a long time, the drinking water safety of residents can be guaranteed, health risks can be found and treated in time, and therefore the health of the residents is protected.

The invention provides an underground water sampling device with a protective structure, and relates to the technical field of underground water sampling, the underground water sampling device comprises a sampling bottle, the bottom of the sampling bottle is sleeved with a protective sleeve; a mounting cover is arranged at the top end of the sampling bottle; a sealing plug is arranged at the position, close to the top end, in the sampling bottle, two hooks are adjusted in the opposite directions to relieve hooking of a limiting clamping block, the sealing plug is driven to slide downwards along a limiting frame through the rebound pulling effect of a first extension spring, and underground water can enter the sampling bottle through a gap between a water inlet and the limiting frame; opening can be controlled according to the underground water collection position, accurate collection of different liquid layers is achieved, the accuracy of sample detection is guaranteed, and the problems that in the process of sampling different water levels, a sampling bottle needs to be controlled to be adjusted to be opened and closed, operation is troublesome, and time and labor are wasted are solved. And unsteady opening and closing control is easy to cause mixing of groundwater at different depths, so that the accuracy of groundwater analysis and detection is influenced.

The invention discloses an underground water sampling device capable of preventing cross contamination. The underground water sampling device comprises a cable type lifting machine; the wire wheel seat is driven by a cable type lifting machine to move up and down, and a carrying table is fixed at the bottom of the wire wheel seat; the motor is fixed on the top surface of the carrying table; and the stratified sampling mechanism is fixed on the bottom surface of the carrying table, is driven by a motor, and can perform synchronous sampling operation on a plurality of sections of underground water. According to the device, through layered synchronous sampling, dynamic sealing control and modular residue prevention design, the goals of high fidelity and low pollution of underground water sampling are achieved, and the device is particularly suitable for application scenes such as deeper underground water monitoring sites and the like which have strict requirements on data precision.

The invention relates to the technical field of underground water sampling detection, in particular to a depth-keeping sampling device for NAPLs polluted underground water. The device can perform accurate stratified sampling on an upper water sample and a lower water sample of a depthkeeping aquifer, effectively reduces disturbance of the aquifer, improves the sampling precision of the water samples, and reduces the measurement error of the volume of polluted groundwater; comprising a monitoring well pipe, a sampling pipe section arranged at the monitoring well pipe and a sampling mechanism used for fixed-depth water sample sampling, and the self-closing type plugging piece comprises an annular frame, a plurality of sampling holes evenly distributed around the annular frame at equal intervals in the circumferential direction and first self-closing valves installed in the sampling holes; the sampling mechanism comprises a walking mechanism which can be installed in the monitoring well pipe in an up-down sliding mode, a guide frame which is installed at the bottom of the walking mechanism and corresponds to the sampling holes, a plurality of sampling devices and a synchronous pushing device. And the sampler comprises a sampling bottle, a valve piece mounted at a bottle opening of the sampling bottle, a sampling tube mounted on the valve piece and a second self-closing valve mounted in the sampling tube.

The invention relates to the technical field of underground water sampling devices, in particular to a water sample collecting device for underground water reconnaissance, which comprises a collecting control cylinder, and further comprises a sampling support fixedly connected with the collecting control cylinder and provided with a water sample collecting part; the movable frame is installed in the sampling support in a sliding mode and detachably connected with the water sample collecting part, and when the movable frame moves into the water sample collecting part, a sealed square collecting space is defined by the movable frame and the water sample collecting part; the sampling control mechanism comprises a telescopic driving assembly and an automatic loosening assembly; the water sample collecting device for underground water exploration can accurately sample a water body at a specified depth position, particularly when sampling operation is carried out at a plurality of depth positions, deviation of a subsequent detection result is avoided, and the water sample collecting precision and effect can be improved.

The utility model discloses an automatic monitoring and sampling device for underground water. The automatic monitoring and sampling device comprises a sampling drill pipe, a sealing cover plate and a sampling pump, a water inlet channel is arranged at the bottom of the sampling drill pipe, a containing cavity used for storing a water sample is formed in the sampling drill pipe, and the water inlet channel is communicated with the containing cavity; the sealing cover plate is detachably arranged at the top end of the sampling drill pipe and is used for sealing the end part of the sampling drill pipe; the sampling pump is detachably arranged on the side wall of the sampling drill pipe, a sampling pipe is arranged at a feeding hole of the sampling pump, and the sampling pipe penetrates through the sealing cover plate and extends to the inner bottom surface of the sampling drill pipe. According to the underground water sampling device, underground water is sucked by forming negative pressure in the sampling drill pipe, underground water can be actively collected and sampled when the content of the underground water is not high, the underground water sampling efficiency can be greatly improved, and meanwhile it is guaranteed that the underground water sampling operation is smoothly carried out.

The invention relates to the technical field of underground water sampling, and discloses an underground water sampling device which comprises a frame body and further comprises a sampling cylinder, a sampling winding drum and a cleaning winding drum, the sampling winding drum and the cleaning winding drum are rotationally connected to the frame body, a sampling cavity is formed in the sampling winding drum, a sampling hose is communicated to the sampling cavity, and a first detection sensor group is mounted on the sampling cylinder; a lower valve cylinder driven by a motor a is rotatably mounted on the inner wall of the sampling cylinder, a lower valve hole is formed in the lower valve cylinder, the sampling end of the sampling hose and the lower valve hole are both communicated with an inner cavity of the lower valve cylinder, an upper branch pipe adaptively communicated with the lower valve hole is arranged on the side surface of the sampling cylinder, and a rotary sampling head is arranged at the lower part of the sampling cylinder; and a rotary flow guide component is arranged between the rotary sampling head and the upper branch pipe. By integrating the high-pressure air pump, the cleaning pump and the sewage suction pump and combining intelligent switching control of the three-way connector and the electromagnetic valve, automatic backwashing of the sampling hose, the rotary sampling head and the flow channel is achieved.

The invention relates to the field of underground water sampling equipment, and discloses an underground water sampling device which comprises a base, a winding roller is movably mounted at the top of the base, pull ropes are wound on the outer diameters of the two sides of the winding roller, a drainage pipe is wound on the outer diameter of the middle of the winding roller, and the tail ends of the winding roller are fixedly connected to the two sides of the top end of a probe respectively. An upper cavity is formed in the upper side of the interior of the probe, a sleeve is movably installed in the middle of the interior of the upper cavity, a plurality of water storage tanks are formed in the positions, close to the outer side of the upper cavity, of the interior of the probe, a rotating shaft is movably installed on the lower side of the interior of the upper cavity, and a lower cavity is formed in the lower side of the interior of the probe. According to the underground water sampling device, on one hand, underground water can be pumped out for conventional sampling through the water absorption and drainage effects of the rubber piston, on the other hand, the water storage tank can collect underground water at different water levels to serve as sampling specimens, underground water sampling in multiple modes is achieved, and different sampling requirements are met.

The invention discloses an intelligent depth-adjustable sampling device for underground water pollution detection, and relates to the technical field of underground water sampling, the intelligent depth-adjustable sampling device comprises a sampling equipment main body and a controller, the bottom of the sampling equipment main body is provided with a driving device, and a supporting table is mounted above the sampling equipment main body; the device comprises a supporting table, a machine shell and a winding assembly are installed on the supporting table, a lifting device is installed at the output end of the supporting table, a drilling assembly and a sampling assembly are installed on the lifting device, a cooling assembly is arranged on the side face of the drilling assembly, and the winding assembly is matched with the sampling assembly. According to the invention, integrated intelligent operation of drilling, depth adjustment, sampling and preliminary detection is realized, and the efficiency and accuracy of underground water pollution detection sampling are significantly improved.

The invention belongs to the technical field of groundwater sampling equipment, and discloses an efficient groundwater stratified sampling device, comprising a frame, wherein the frame is provided with an operating table and a lifting device, wherein the lifting device is connected with a plurality of sampling devices along a height direction, wherein the sampling device comprises a sampling barrel, wherein the sampling barrel is provided with a plurality of water inlets along a circumferential direction, wherein the sampling barrel is rotatably connected with a plurality of rotating plates along a circumferential direction, wherein the rotating plates correspond to the water inlets one by one, and wherein the rotating plates are fastened with a retractable push-pull rod; wherein a driving assembly is provided at the top of the sampling barrel, wherein the driving assembly is rotatably connected with the free end of the push-pull rod, and wherein the driving assembly is used for driving the push-pull rod to rotate toward or away from the sampling barrel; wherein a sealing member is connected with a side of the rotating plate close to an outer wall of the sampling barrel; wherein a controller for controlling the operation of the driving assembly is provided at the operating table; wherein the invention solves the problems that the existing water taking device is prone to cause cross-mixing of water bodies at different depths, has low sampling efficiency, and is prone to blockage of water inlets.

A fast and convenient groundwater sampling device, which relates to a groundwater collection device. It solves the problems of the existing groundwater collection device with complex structure, inconvenient field sampling and low efficiency. The middle part of the connecting rod of the push-pull opening and closing device of the present invention is arranged inside the funnel cylinder and the shower pipe. The shower pipe is arranged at the lower end of the funnel cylinder. The rubber valve is arranged between the shower pipe directly below and the counterweight chassis. The structure of the present invention is reasonably arranged, simple in structure, convenient to carry and store, improves the flexibility and convenience of field sampling work, and the setting of the counterweight chassis, exhaust port and shower pipe water inlet hole is beneficial for the sampling device to quickly sink in groundwater, thereby improving the sampling efficiency.

The utility model discloses an underground water sampling device for engineering geological survey, which comprises a main body assembly, a control box, a positioning plate, ground nails, a support frame and a driving box, the support frame is arranged in the control box, and the driving box is fixed at the top of the support frame; the water taking assembly comprises a moving part, a winding part and a sample separating part, the moving part is arranged in the control box, the winding part is arranged in the driving box, and the sample separating part is arranged below the driving box. The underground water sampling device has the beneficial effects that through the matched use of the moving part and the winding part, a worker can conveniently operate and sample underground water at a position far away from a water source sampling point, the worker can be prevented from falling into water accidentally, the safety during water source sampling is improved, and through the arrangement of the sample separating part, the worker can conveniently place the sampler into the underground water, so that the sampling efficiency is improved. Five underground water sources with different depths are sampled at a time, and meanwhile, filter holes are formed in the top of the sample separating barrel, so that weeds or large-particle impurities can be prevented from entering the sample separating barrel.

The invention relates to an underground water sampling device for geological exploration, and belongs to the technical field of underground water sampling devices. The device comprises an unwinding mechanism and a sampling mechanism, the unwinding mechanism comprises an unwinding drum, a scale rope is wound on the unwinding drum, the sampling mechanism is connected to the free end of the scale rope and comprises a plurality of sampling barrels, partition plates are installed in the sampling barrels, inner cavities of the sampling barrels are divided into top cavities and bottom cavities by the partition plates, and water inlets communicated with the top cavities are formed in the sampling barrels; a first plugging assembly is movably installed at the water inlet, a piston plate is slidably installed in the bottom cavity and divides the bottom cavity into a gas cavity and a liquid cavity which are sequentially arranged from top to bottom, a water inlet hole communicated with the liquid cavity is formed in the sampling barrel, a gas outlet hole communicated with the gas cavity is further formed in the sampling barrel, and a one-way valve set is installed at the gas outlet hole. The water inlet is further provided with a second plugging assembly. According to the method, the sample difference can be improved, so that the obtained sample is more representative.

The present invention relates to the technical field of groundwater sampling and detection, and in particular to a fixed-depth sampling device for NAPLs-contaminated groundwater; the device can accurately sample upper and lower water samples of a fixed-depth aquifer, effectively reduce disturbance of the aquifer, improve water sampling accuracy, and reduce errors in measuring the volume of contaminated groundwater; the device comprises a monitoring well pipe, a sampling pipe section arranged at the monitoring well pipe, and a sampling mechanism for sampling water at a fixed depth; the self-closing plugging member comprises a ring frame, a plurality of sampling holes equidistantly distributed circumferentially around the ring frame, and a first self-closing valve installed in the sampling hole; the sampling mechanism comprises a traveling mechanism slidably installed in the monitoring well pipe, a guide frame installed at the bottom of the traveling mechanism and arranged corresponding to the sampling holes, a plurality of samplers, and a synchronous pusher; the sampler comprises a sampling bottle, a valve component installed at the bottle mouth of the sampling bottle, a sampling tube installed on the valve component, and a second self-closing valve installed in the sampling tube.

The present invention relates to the technical field of groundwater sampling, and specifically to a sampling device for groundwater detection, comprising a support base, a rotating shaft connected to the support base passes through the support base, a driver for driving the rotating shaft to rotate is installed on the support base, a shielding sleeve is provided on the outer sleeve of the rotating shaft, and a damping transmission structure adapted to the shielding sleeve is installed on the rotating shaft. A plurality of sampling boxes uniformly distributed in a circle are provided above the support base, the sampling box is a cavity structure with an opening at one end, and the opening directions of the plurality of sampling boxes are all toward the shielding sleeve, a mounting hole is provided on the shielding sleeve, and a filter screen adapted to the sampling box is fixedly connected in the mounting hole; workers do not need to place the sampling device in the groundwater multiple times, but only need to place the sampling device in the groundwater once to obtain groundwater at different depths, thereby improving the convenience of sampling.

This invention relates to the field of groundwater sampling devices, and more particularly to a sampling device for detecting groundwater pollutants. The technical solution includes: a rope and multiple samplers detachably mounted on the rope. Each sampler has a flow hole allowing water to pass through it. A contraction structure includes a first pull rope and a first control rope connected to the first pull rope. A sealing structure is installed inside the upper and lower ends of each sampler. The sealing structure includes a flexible, annular membrane, on which a second, annular pull rope is fitted. This invention reduces mixing of water layers at different depths, prevents disruption of the natural stratification of the water body, and allows for large-scale sampling of the water body in a single operation. This prevents the problem of small water samples affecting the accuracy, representativeness, and reliability of the analysis results, and avoids the problem of repeated water sampling exacerbating water body interference.

The present invention relates to the technical field of sampling devices, and particularly relates to a groundwater sampling device, which includes a positioning ring, a mounting ring, a support assembly, a sampling cylinder, a protection assembly and an adjustment assembly. When the positioning ring reaches the sampling water layer, the adjustment assembly adjusts the distance between the mounting ring and the positioning ring. When the mounting ring and the positioning ring approach each other, the first support rod and the second support rod of multiple adjustment assemblies simultaneously change from the first state to the second state. And, the protection assembly removes the obstruction to water entering the interior of the sampling cylinder. At the same time, the protection assembly can prevent debris in the groundwater from entering the sampling cylinder, ensuring that the water sample entering the interior of the sampling cylinder is representative. At the same time, after the sampling cylinder reaches the sampling water layer, water can pass through the protection assembly and enter the interior of the sampling cylinder, avoiding different layers of groundwater from entering the same sampling cylinder, thereby ensuring that the collected water sample has sufficient representativeness.

The utility model provides an underground water sampling device, and mainly relates to the field of underground water sampling equipment. The underground water sampling device comprises a U-shaped plate, connecting plates are installed on the two sides of the bottom face of the U-shaped plate, two rolling wheels distributed front and back are installed on the bottom face of each connecting plate, the rolling wheels have the braking function, two telescopic rods distributed left and right are installed on the top face of the U-shaped plate, and a containing plate is installed between the bottom ends of the two telescopic rods. A connecting sleeve is mounted on the top surface of the placing plate. The sampling device has the beneficial effects that the sampling device is simple in structure and convenient to use, the connecting sleeve can be driven to move up and down through extension and contraction of the telescopic rod, and then the sampling barrel is driven to move up and down, so that the sampling barrel can conveniently extend into an underground sampling port for sampling, and the sampling barrel is prevented from shaking and colliding with the sampling port; meanwhile, the vertical rod and the connecting sleeve are arranged in a separable manner, so that the sampling barrel can be conveniently mounted and can conveniently extend into the sampling opening, and further, convenience is brought to underground water sampling.

This invention relates to the field of hydrogeology, specifically to a groundwater sampling device for hydrogeology. The device comprises multiple vertically arranged splicing rods, each with a threaded hole at its top and a screw head fixedly connected to its bottom. The screw head engages with the adjacent threaded hole. A circular hole is formed on the top surface of a sleeve plate, which slidably engages with the outer wall of the splicing rod. A motor box is located on one side of the sleeve plate. In this invention, the splicing rods are sequentially spliced ​​and inserted into a well. A welded metal bracket secures the splicing rods to the wellhead. The sleeve plate is lowered to the aquifer using an automatic winch. An electric push rod moves the sampling mechanism, allowing it to drill into the aquifer through the well pipe's filter holes. The sampling mechanism then samples the water flow within the aquifer, improving the accuracy of sampling a single aquifer. After sampling, a filling mechanism can backfill the aquifer with soil, facilitating sampling operations for users.

This invention discloses a micro-well-washing groundwater sampling system and method, including a sampling point, which is a section of water inside the well pipe; it also includes pumping equipment and sensor equipment, both located at the sampling point; it further includes two groundwater detectors and a detection host, with the two groundwater detectors located above and below the sampling point, respectively. The two groundwater detectors are used to monitor the water flow between the upper and lower water bodies and the sampling point; the detection host is used to receive the real-time water flow data monitored by the groundwater detectors and adjust the pumping speed of the pumping equipment in real time according to the water flow data and the pumping strategy; the detection host is used to receive the water quality indicators collected in real time by the sensor equipment; the detection host judges whether the water at the sampling point meets the preset sampling conditions at preset time intervals, and collects water samples if the preset conditions are met.

The invention relates to the related technical field of underground water sampling, and discloses urban underground water investigation sampling equipment and a use method thereof.The urban underground water investigation sampling equipment comprises a control device, the bottom of the control device is movably connected with multiple underground water sampling devices, and each underground water sampling device comprises an electric telescopic rod; a fixing assembly is fixedly connected to the electric telescopic rod, a rack is fixedly connected to the bottom of the fixing assembly, a gear is connected to the side face of the rack in a meshed mode, a rack plate is connected to the side face of the gear in a meshed mode, a connecting ring is fixedly connected to the bottom of the rack plate, and a bottom cover plate is rotationally connected to the side face of the connecting ring. According to the device, water in the sampler is discharged through the electric telescopic rod before sampling, a sample can be preliminarily filtered during sampling, the sampler can be better sealed after sampling, and residual water is prevented from being stored in the sampler, so that the accuracy of an investigation result is improved, and the device is more convenient to use.

The utility model relates to the technical field of underground water sampling equipment, one embodiment of the utility model provides a layered water stopping device for hydrogeological drilling, the layered water stopping device for hydrogeological drilling comprises a box body, and a partition plate is fixedly connected to the middle of an inner cavity of the box body. An operator pumps underground water in a cavity in the top end of a partition plate through a connecting pipe, and when a first motor is started, a rotating shaft and a hollow block rotate, so that the inner surface of the hollow block extrudes and pushes the outer surface of a circular shaft, and then the circular shaft drives a connecting block to integrally move leftwards; according to the technical scheme, the bottom end of the moving block moves to the top end of the first water pipe, then shielding of the second water pipe is relieved, the first water pipe is shielded, and an operator can extract underground water in a cavity in the bottom end of the partition plate. The technical problem that underground water of different depths cannot be pumped at a time in the prior art is solved.

The utility model discloses an underground water sampler and a multi-depth underground water sampling system, the sampler comprises a hollow sampling container and covers sealed at the openings at the two ends of the sampling container, a plurality of axial through holes are formed on the annular wall of the sampling container, and the axial through holes extend out of the two ends of the sampling container; wherein one cover is provided with a suction pipe communicated with the inner cavity of the sampling container, and the annular wall of the sampling container is provided with a plurality of radial holes. The system comprises at least ten sampling hoses, a plurality of long pipes and a sampler, one end of each long pipe is detachably and fixedly connected with one end of the sampler, and the other end of each long pipe is detachably and fixedly connected with one end of another sampler; and each sampling hose sequentially penetrates through the axial through hole in each sampler from top to bottom and is connected with the suction pipe of the sampler with the corresponding depth. According to the utility model, more than ten sampling hoses can be connected in series, water samples in sampling containers with different depths can be extracted, the structure is simple, the assembly is convenient, and the manufacturing cost is low.

The application discloses an automatic control system for groundwater sampling and microbial sample pretreatment, and belongs to the technical field of groundwater environment monitoring. The system comprises a sample collection unit, a microbial pretreatment unit, a sample detection unit, a sample storage unit, a wastewater storage unit and an intelligent control system. The sample collection unit comprises a sampling head, a sampling tube, an air bag pump and a first flow sensor. The microbial pretreatment unit comprises a multi-stage filtration system and a filter membrane storage system. The intelligent control system is used for receiving flow signals and feeding back to adjust the opening and closing of each valve and control pump water parameters. The application provides an automatic control system for groundwater sampling and microbial sample pretreatment based on hydrogeology and monitoring well parameters, Internet of Things sensing technology, self-control valve groups and model algorithm coupling. The system can realize adaptive control and optimization of sampling and pretreatment parameters through multi-source data fusion.

The utility model relates to the technical field of underground water collection, in particular to an underground water sampling device which is internally provided with a sampling assembly, a buoyancy assembly, a trigger assembly and an alarm assembly, the buoyancy assembly and the trigger assembly are both installed in the sampling assembly, and the alarm assembly is arranged at the top end of the sampling assembly. The trigger assembly is located between the alarm assembly and the buoyancy assembly, and the trigger assembly is electrically connected with the alarm assembly; thus, an underground water sample is collected through the sampling assembly, the buoyancy assembly ascends along with rising of the liquid level of underground water in the sampling assembly, when the liquid level of the underground water reaches the preset height, the buoyancy assembly makes contact with the trigger assembly to generate a trigger signal, the alarm assembly sends out a high alarm prompt after receiving the trigger signal, and therefore workers on the ground are informed; therefore, the underground water sampling efficiency is improved.

The invention discloses a sampling device for a hydraulic environment geological environment, and belongs to the technical field of geological environment sampling. The sampling device for the hydraulic ring geological environment comprises a traction rope and a sampling barrel and further comprises a limiting assembly arranged between the traction rope and the sampling barrel, the limiting assembly comprises a supporting disc, the supporting disc is arranged between the traction rope and the sampling barrel, the sampling barrel is connected to the lower portion of the supporting disc through a supporting pipe, and a sliding rod is horizontally inserted in the peripheral side of the supporting disc in a sliding mode; the end part of the sliding rod is fixedly connected with a rolling piece, the rolling piece comprises a roller, the top of the supporting disc is provided with an inserting piece, the inserting piece comprises a horizontally arranged inserting rod, and when the sampling barrel penetrates through the sampling well and is placed in underground water to be sampled, the inserting rod is inserted into the side wall of the sampling well and is in temporary limiting connection with the side wall of the sampling well; according to the underground water sampling device, by arranging the limiting assembly, when underground water sampling is conducted, the lowered sampling barrel is limited, and shaking of the sampling barrel is prevented.

The application discloses a kind of underground water monitoring automatic sampling device, belongs to underground water sampling technical field.A kind of underground water monitoring automatic sampling device, including portable power supply, control module, submersible pump, receiving tank and monitoring device;Control module is electrically connected with submersible pump, portable power supply and monitoring device by cable respectively;Receiving tank is communicated with submersible pump by water pipe, for collecting and storing water sample, monitoring device is used to monitor the parameter of underground water sample, control module is used to control the start-stop of submersible pump and sampling time and receive the underground water sample parameter monitored by monitoring device;Submersible pump includes pump body, waterproof motor and impurity removal device;Waterproof motor is detachably connected with the lower part of pump body, and the pump body is driven by waterproof motor to run and extract water sample;Impurity removal device is arranged between waterproof motor and pump body, can filter the impurities in underground water entering pump body simultaneously during sampling process, prevent dirt adhesion, prolong the service life of device.

This invention relates to the field of sampling device technology and discloses a stratified groundwater sampling device, including a sampling tube, and further comprising: a cylindrical component, a sliding component, multiple baffle plates, and multiple sliding rods. The cylindrical component is fixedly connected to the middle of the sampling tube with their center lines coinciding. The sliding component is slidably connected inside the cylindrical component, and its upper end is pulled by a pulling component and uniformly fitted and fixed to the outside of the cylindrical component. Each baffle plate divides the cavity between the cylindrical component and the sampling tube into multiple water storage cavities of the same size. Multiple sliding holes are formed through the middle of the baffle plate along its circumference. The bottom of each sliding hole has a water filling hole communicating with the water storage cavity. Multiple sliding rods are slidably connected to each sliding hole in a corresponding manner. Sealing plugs are fitted and fixed to the portions of the sliding rods near the sampling tube and the cylindrical component. One end of each sliding rod extends into the cylindrical component, and a reset component is connected to the sliding rod within the sliding hole. This invention enables continuous underwater stratified sampling of groundwater at different depths.

The invention relates to the technical field of monitoring devices, in particular to a soil heavy metal monitoring device which comprises a positioning disc, a sampling insertion rod is fixedly mounted at the bottom of the positioning disc, a collection column groove is formed in the sampling insertion rod, and the collection column groove communicates with a collection shell. A stirring assembly is rotatably mounted at the bottom of the collecting column groove through a bearing, the stirring assembly comprises a homogenizing disc, a sealing plate capable of sliding up and down is arranged on the inner side of the collecting column groove, water drawing cotton is fixedly mounted at the top of the sealing plate, and the sealing plate and the water drawing cotton move up and down to complete sampling and cleaning work; by adopting the design of the water drawing cotton, the underground water sampling process is optimized, the underground water can be effectively transported to the ground for detection, the damage to the surrounding soil environment is remarkably reduced, the influence on the soil ecology is reduced, and the underground water sampling device is particularly suitable for sampling a small amount of underground water and enhancing the sampling efficiency.