GB2626386A - Portable intelligent low-disturbance sampling apparatus - Google Patents
Portable intelligent low-disturbance sampling apparatus Download PDFInfo
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- GB2626386A GB2626386A GB2302377.3A GB202302377A GB2626386A GB 2626386 A GB2626386 A GB 2626386A GB 202302377 A GB202302377 A GB 202302377A GB 2626386 A GB2626386 A GB 2626386A
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- 238000005070 sampling Methods 0.000 title claims abstract description 200
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 226
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000012806 monitoring device Methods 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 13
- 239000000523 sample Substances 0.000 claims description 83
- 238000012544 monitoring process Methods 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 36
- 239000003673 groundwater Substances 0.000 claims description 13
- 238000012856 packing Methods 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 3
- 244000005700 microbiome Species 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000008398 formation water Substances 0.000 abstract 1
- 238000003895 groundwater pollution Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229940101532 meted Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- Hydrology & Water Resources (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A portable intelligent low-disturbance sampling apparatus, comprising a power supply device (1), a low-disturbance water pumping device, a packer device, a downhole monitoring device, a true value determination and sampling device (2), and an automatic controller (3). The low-disturbance water pumping device comprises a sampling pump (5), a sampling pipe (6), a cable (7) and a frequency conversion controller (8), and is used for completing a low-disturbance underground water sampling task; the true value determination and sampling device (2) is used for enabling water sample circulation and determining whether a collected water sample is a real formation water sample; the downhole monitoring device is used for measuring downhole water level and water temperature data; the low-disturbance water pumping device, the downhole monitoring device, and the true value determination and sampling device (2) all need to be connected to the power supply device (1) by means of the automatic controller (3) via the cable (7) or a data line. The sampling device causes little disturbance to an underground aquifer, can satisfy the collection requirements for test samples such as inorganic components, organic components, microorganisms, and dissolved oxygen, and has a true value determination function to analyze parameters such as TDS, PH and dissolved oxygen of a water sample.
Description
PORTABLE AND INTELLIGENT LOW-DISTURBANCE SAMPLING
EQUIPMENT
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of water sampling and detection, and in particular, to portable and intelligent low-disturbance sampling equipment.
BACKGROUND ART
[0002] Sampling and monitoring equipment is a basic link in a groundwater pollution monitoring network, and is one of the key links to decide the accuracy of groundwater pollution monitoring. The traditional single mixed layer sampling way is greatly affected by seasonal variation of groundwater flow direction or precipitation fluctuation, and due to a large area of depression cone existing in the groundwater in Beijing-Tianjin-Hebei region, fluctuates significantly under an influence of precipitation, and cannot meet requirements of groundwater pollution plume and pollution degree description.
[0003] During groundwater sampling, how to obtain a representative groundwater sample from a monitoring well completely and efficiently is the focus and difficulty of sampling work. Scholars at home and abroad have devoted a lot of energy to the research of this technology. During groundwater sampling of traditional groundwater sampling apparatuses such as a Bailers tube, a grab sampler, a gas displacement sampler, an air bag pump, a peristaltic pump, an electric submersible pump, and an inertia lift pump, sampling parts repeatedly cross or strongly agitate an aquifer, which causes great disturbance, resulting in the volatilization of organic pollutants contained in water, and creating cross pollution of groundwater samples between different strata or aquifers. Thus, the obtained water sample is not enough to represent the actual pollution situation at a certain depth.
[0004] Therefore, it is urgently necessary to carry out the research and development of portable and intelligent low-disturbance sampling equipment to improve the sampling and monitoring technology level of groundwater pollution in China and provide technical support for the correct evaluation of groundwater pollution conditions.
SUMMARY
[0005] An object of the present disclosure is to provide a portable and intelligent low-disturbance sampling equipment to solve the problems in the prior art, which has low disturbance to an underground aquifer, can meet the requirements for collection of detection samples of inorganic components, organic components, microorganisms, dissolved oxygen and the like, has a truth value determination function, and can analyze the parameters of water samples including Total Dissolved Solids (TDS), Pondus Hydrogenii (PH), dissolved oxygen and the like.
[0006] To achieve the abovementioned object, the present disclosure provides the following solutions.
[0007] The present disclosure provides a portable and intelligent low-disturbance sampling equipment, which includes a power supply device, a low-disturbance water pumping device, a packing device, a downhole monitoring device, a truth value determination and sampling device and an automatic controller. Thc low-disturbance water pumping device includes a sampling pump, a sampling tube, electrical cables, and a variable frequency controller, and is used to perform a low-disturbance groundwater sampling task. The sampling pump is connected to the truth value determination and sampling device through the sampling tube. The packing device is arranged in a well and is used to pack a target water sampling layer from other non-target aquifers. The truth value determination and sampling device includes a water sample circulation tank, a low-disturbance sampling area, and a water quality detection probe, and is used for a water sample to circulate and determining whether a collected water sample is a true water sample of a stratum. The downhole monitoring device includes a water level and water temperature monitoring probe and data lines, and is used to measure the data of downhole water level and water temperature. All of the low-disturbance water pumping device, the downhole monitoring device, and the truth value determination and sampling device need to be coimected to the power supply device through the automatic controller by means of electrical cables or data lines.
[0008] Preferably, a water outlet of the sampling pump is connected to a water entry of the sampling tube. A water exit of the sampling tube is communicated with the truth value determination and sampling device through the packing device. The sampling pump is connected to the variable frequency controller through an electrical cable.
[0009] Preferably, the sampling pump is a screw submersible pump, which has an outside diameter C-50 mm.
[0010] Preferably, the sampling tube includes a polytetrafluoroethylene water tube and a steel wire rope and an electrical cable wrapped on the polytetrafluoroethylene water tube by a tetrafluoroethylene tape. The sampling tube is controlled to retract and release by a winch.
[0011] Preferably, the variable frequency controller is used to adjust the flow of a water pump, so as to realize high-flow-rate well flushing and low-flow-rate sampling, shorten a sampling assisting time, and reduce disturbance to a water sample.
[0012] Preferably, the packing device includes an inflatable packer, a high-pressure pipeline, and a gas supply source. The inflatable packer includes an upper joint, a lower joint, a rubber cylinder, and a central tube. The rubber cylinder is sleeved outside of the central tube in a sleeving mode. The rubber cylinder is connected to the gas supply source through the high-pressure pipeline. The upper joint is threaded to a top of the central tube. The lower joint is threaded to a lower end of the central tube. The lower joint and the lower end of the central tube are sealed through an 0-shaped ring. A tube body of the sampling tube penetrates through the upper joint, the lower joint, and the central tube.
[0013] Preferably, a body of the truth value determination and sampling device is a box body in a cuboid shape. The box body is provided with a water intake, a water outtake, a water overflow port, and a monitoring window which arc all circular. The water intake is formed in a central position of one side of the box body. The water outtake and the water overflow port are formed in an other side of the box body. The water overflow port is located at topside of the water outtake. The water intake is connected to a water exit of the sampling tube. The water outtake is provided with a solenoid valve to control water drainage. The water outtakc and the water overflow port arc connected with polytetrafluoroethylene drain pipes. A water quality detection probe is placed in the monitoring window, and the monitoring window is sealed by using an 0-shaped ring. [0014] Preferably, a baffle plate is arranged inside the box body. The baffle plate is arranged transversely, so that the box body is divided into a water sample circulation tank and a low-disturbance sampling area. The water sample circulation tank is arranged at a bottom of the low-disturbance sampling area. The water quality detection probe is located in the water sample circulation tank. The water quality detection probe is used to perform truth value determination on a water sample. Several sampling bottles are placed in the low-disturbance sampling area for collecting water samples with low disturbance, [0015] Preferably, indexes that the water quality detection probe can detect include a pH value, temperature, electrical conductivity, redox potential, dissolved oxygen, and turbidity.
[0016] Preferably, the automatic controller includes a water pump control switch, a frequency adjustment unit of a frequency converter, a power supply unit for a monitoring probe, a liquid crystal display, a solenoid valve control unit, a memory system, an alarm unit, and a Bluetooth module. The water pump control switch is used to control a startup and shutdown of the sampling pump. The frequency adjustment unit of the frequency converter adopts an RS485 serial port to adjust a frequency of the variable frequency controller in order to control a flow rate of the sampling pump. The power supply unit for the monitoring probe includes two power supply units for supplying power to the water level and water temperature monitoring probe and supplying power to the water quality detection probe. The watcr level and water temperature monitoring probe adopts four lines and has a voltage of 9 V. and the water quality detection probe adopts four lines and has a voltage of 12 V. both of which adopt RS485 serial ports. The solenoid valve control unit has a power supply voltage of 12V, and is used to control a startup and shutdown of the solenoid valve. The memory system is used to store water quality detection data obtained during sampling. The alarm unit is used to prompt an operator of a sampling process. The Bluctooth module can adopt an RS485/232 serial port for communication to transmit sampling and water quality detection data to a mobile phone APP for remote viewing The liquid crystal display is used to display the parameters comprising a pH value, temperature, conductivity, redox potential, dissolved oxygen, and turbidity.
[0017] The present disclosure can achieve the following beneficial tecluncal effects over the prior art.
[0018] 1). The portable and intelligent low-disturbance sampling equipment provided according to the present disclosure has low disturbance to an underground aquifer, can meet the requirements for the collection of detection samples of inorganic components, organic components, microorganisms, dissolved oxygen and the like, and can obtain representative groundwater samples of each stratum from a monitoring well completely arid efficiently.
[0019] 2). The portable and intelligent low-disturbance sampling equipment provided according to the present disclosure is not in contact with air during sampling, and can effectively reduce the disturbance of an external environment to a water sample.
[0020] 3). The portable and intelligent low-disturbance sampling equipment provided according to the present disclosure has the advantages of convenience in carrying, simple installation, easy transportation and so on, and the applicable depth is within 120 m.
[0021] 4). The portable and intelligent low-disturbance sampling equipment provided according to the present disclosure has the functions of controlling automatically and monitoring intelligently, can intelligently analyze and automatically control a sampling process according to sampling data and reduce the disturbance of human factors, and saves time and labor Meanwhile, the portable and intelligent low-disturbance sampling equipment also has a data transmission function, and can receive water sample analysis data through the mobile phone APP.
[0022] 5). The portable and intelligent low-disturbance sampling equipment provided according to the present disclosure can be corn-meted to the packer to perform stratified groundwater sampling.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] To make the technical solutions in the embodiments of the present disclosure or in the prior art more clear, the drawings for showing the embodiments will be briefly described below. Apparently, the drawings in the following description are merely some embodiments of the present disclosure, and those of ordinary skill in the art can still derive other drawings from these drawings without creative efforts.
[0024] FIG. 1 is a schematic structural diagram of a portable and intelligent low-disturbance sampling equipment in the present disclosure; and [0025] FIG. 2 is a schematic structural diagram of a truth value determination and sampling device of the present disclosure.
[0026] in the drawings: 1 power supply device; 2 truth value determination and sampling device; 3 automatic controller; 4 winch; 5 sampling pump; 6 sampling tube; 7 electrical cable; 8 variable frequency controller; 9 water level and water temperature monitoring probe; 10 data line; 11 inflatable packer; 12 high-pressure pipeline; 13 gas supply source; 14 upper joint; 15 lower joint; 16 rubber cylinder; 17 central tube; 18 box body; 19 water intake; 20 water outtake; 21 water overflow port; 22 monitoring window; 23 baffle plate; 24 water sample circulation tank; 25 low-disturbance sampling area; 26 cover plate.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] Technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely part rather than all of the embodiments of the present disclosure. On the basis of the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present disclosure.
[0028] An object of present disclosure is to provide a portable and intelligent low-disturbance sampling equipment, in order to solve the problems in the prior art.
[0029] For making thc abovementioned object, features, and advantages of the present disclosure more apparent and more comprehensible, the present disclosure is fiuther described in detail below with reference to the drawings and specific implementation modes.
[0030] As shown in FIG. 1, in accordance with the present embodiment, a portable and intelligent low-disturbance sampling equipment includes a power supply device 1, a low-disturbance water pumping device, a packing device, a downhole monitoring device, a truth value determination and sampling device 2, and an automatic controller 3. The low-disturbance water pumping device includes a sampling pump 5, a sampling tube 6, electrical cables 7, and a variable frequency controller 8, and is used to complete a low-disturbance groundwater sampling task. The sampling pump 5 is connected to the mall value determination and sampling device 2 through the sampling tube 6. Ile packing device is arranged in a well, and is used to pack a target water sampling layer from other non-target aquifers. The truth value determination and sampling device 2 includes a water sample circulation tank 24, a low-disturbance sampling area 25, and a water quality detection probe, and is used for a water sample to circulate and determining whether the collected water sample is a true water sample of a stratum or not. The downhole monitoring device includes a water level and water temperature monitoring probe 9 and data lines 10, and is used to measure data of downhole water level and water temperature. All of the low-disturbance water pumping device, the downhole monitoring device, and the truth value determination and sampling device 2 need to be connected to the power supply device 1 through the automatic controller 3 by means of electrical cables or data lines.
[0031] In the present specific embodiment, a water outlet 20 of the sampling pump 5 is connected to a water entry of the sampling tube 6. A water exit of the sampling tube 6 is communicated with the truth value determination and sampling device 2 through the packing device. The sampling pump 5 is connected to the variable frequency controller 8 through an electrical cable 7. The variable frequency controller 8 is used to adjust flow rate of the water pump, so as to realize high-flow-rate well flushing and low-flow-rate sampling, shorten sampling assisting time, and reduce the disturbance to a water sample. The sampling pump 5 is a screw submersible pump, which has an outside diameter 50 mm, and belongs to a positive displacement rotor pump, wherein liquid is sucked and discharged by means of a volume change of a sealing chamber formed by a screw and a bushing. The flow rate is stable, uniform and continuous, the outlet pressure is stable, and a vortex is not fonned when a medium is transported.
[0032] in the present specific embodiment, the sampling tube 6 includes a polytetrafluoroethylene water tube and a steel wire rope and an electrical cable wrapped on the polytetrafluoroethylene water tube by a tetrafluoroethylene tape, thus reducing an influence on water quality of a water sample. The sampling tube 6 is controlled to retract and release by a winch 4. A fixed end of the steel wire rope is connected to the winch 4. The parts of the electrical cable and the polyietrafluoroethylene water tube which are not bound together each other extend from the winch 4, and are connected to the variable frequency controller 8 and the truth determination and sampling device 2, respectively.
[0033] In the present specific embodiment, the packing device includes an inflatable packer 11, a high-pressure pipeline 12, and a gas supply source 13. The inflatable packer 11 includes an upper joint 14, a lower joint 15, a rubber cylinder 6, and a central tube 17. The rubber cylinder 6 is sleeved outside of the central tube 17. The rubber cylinder 6 is connected to the gas supply source 13 through the high-pressure pipeline 12. The upper joint 14 is threaded to a top of the central tube 17. The lower joint 15 is threaded to a lower end of the central tube 17. The lower joint 15 and the lower end of the central tube 17 are sealed through an 0-shaped ring. A tube body of the sampling tube 6 penetrates through the upper joint 14, the lower joint 15, and the central tube 17. When the inflatable packer 11 is required to pack, the gas in the gas supply source 13 is filled into the rubber cylinder 6 through an air pump, so that the rubber cylinder 6 expands to achieve an effect of packing.
[0034] As shown in FIG. 2, a body of the truth value determination and sampling device 2 is a box body 18 in a cuboid shape. The box body 18 is provided with a water intake 19, a water outtake 20, a water overflow port 21, and a monitoring window 22 which are all circular. The water intake 19 is formed in a central position of one side of the box body 18. The water outtake 20 and the water overflow port 21 are formed on the other side of the box body 18. The water overflow port 21 is located at topside of the water outtake 20. The water intake 19 is connected to the water exit of the sampling tube 6. The water outtake 20 is provided with a solenoid valve for controlling water drainage. The water outtake 20 and the water overflow port 21 are connected with the polytetrafluoroethylene drain pipes. A water quality detection probe (not shown in the drawings) is placed in the monitoring window 22, and the monitoring window 22 is sealed by using an 0-shaped ring. A baffle plate 23 is arranged inside the box body 18. The baffle plate 23 is arranged transversely, so that the box body 18 is divided into a water sample circulation tank 24 and a low-disturbance sampling area 25. The water sample circulation tank 24 is arranged at a bottom of the low-disturbance sampling area 25. The water quality detection probe is located in the water sample circulation tank 24. The water quality detection probe is used to perform truth value determination on a water sample. The baffle plate 23 can be provided with multiple placement troughs, so that multiple sampling bottles can be placed in the low-disturbance sampling area 25 for collecting water samples with low disturbance. A pH value, temperature, electrical conductivity, redox potential, dissolved oxygen, and turbidity of a water sample are detected by providing a water quality detection probe.
[0035] In the present specific embodiment, the automatic controller 3 includes a water pump control switch, a frequency adjustment unit of a frequency converter, a power supply unit for a monitoring probe, a liquid crystal display, a solenoid valve control unit, a memory system, an alarm unit, and a Bluetooth module. The water pump control switch is used to control a startup and shutdown of the sampling pump S. The frequency adjustment unit of the frequency converter adopts an RS485 serial port to adjust the frequency of the variable frequency controller 8 to control the flow rate of the sampling pump 5. The power supply unit for the monitoring probe includes two power supply units, i.e., a power supply unit for supplying power to the water level and water temperature monitoring probe 9 and a power supply unit for supplying power to the water quality detection probe. The water level and water temperature monitoring probe 9 adopts four lines and has a voltage of 9 V. and the water quality detection probe adopts four lines and has a voltage of 12 V. both of which adopt RS485 serial ports. The solenoid valve control unit has a power supply voltage of 12V, and is used to control a startup and shutdown of the solenoid valve. The memory system is used to store water quality detection data obtained during sampling. The alarm unit is used to prompt an operator of a sampling process. The Bluetooth module may adopt an RS485/232 serial port for communication to transmit sampling and water quality detection data to a mobile phone APP for remote viewing. The liquid crystal display is used to display the parameters, such as a pH value, temperature, conductivity, redox potential, dissolved oxygen, and turbidity.
[0036] A method of using the portable and intelligent low-disturbance sampling equipment in accordance with the present disclosure includes the following steps.
[0037] A). According to a sampling requirement, a water outlet of a sampling pump 5 is connected to a water entry of a sampling tube 6, a water exit of the sampling tube 6 is communicated to a water intake 19 of a truth value determination and sampling device 2, and an electrical cable 7 of the sampling pump 5 is connected to a variable frequency controller 8 in sequence. A water level and water temperature monitoring probe 9 is fixed at about 20 cm above a connection joint between the sampling tube 6 and the sampling pump 5. A data line 10 of the water level and water temperature monitoring probe 9 is fixed to a steel wire rope of the sampling tube 6. A water outtake of the truth value determination and sampling device 2 is installed with a solenoid valve and is connected to a drainage pipeline. A water overflow port 21 is directly connected to a polytctrafluorocthylenc drainage pipeline. A water quality detection probe is placed in a monitoring window 22, and the monitoring window 22 is sealed by using an 0-shaped ring. All of a low-disturbance water pumping device, a downhole monitoring device, and the truth value determination and sampling device 2 need to be connected to the power supply device 1 through an automatic controller by means of electrical cables 7 or data lines 10.
[0038] B). After the connection of the equipment is completed, the sampling pump 5 and the water level and water temperature monitoring probe 9 are lowered to a sampling position in a well, and pipelines are fixed to a wellhead through fixtures after the sampling pump 5 arid the water level and water temperature monitoring probe 9 reach predetermined positions.
[0039] C). The power supply device 1 is turned on, and by means of an automatic control device, the sampling pump 5 is started, and the variable frequency controller 8 is controlled to adjust the flow rate to the maximum to complete well flushing work before sampling. Meanwhile, a water level change is monitored through the water level and water temperature monitoring probe 9, which can not only prevent the water level from being lower than a water inlet 19 of the sampling pump 5, but also guide an operator to adjust the flow rate of the sampling pump 5 according to a drawdown of the water level, so as to ensure that the sampling pump 5 discharges water normally.
[0040] D). After the sampling pump 5 supplies water nonnally, the solenoid valve of the water outlet 20 is closed, and water is stored in the water sample circulation tank 24 until the water level in the box body 18 submerges the water quality detection probe. The water quality detection probe starts to work, and begins to perform truth value determination on the water sample according to the detection time (different time intervals of 30 min, 15 min, 10 min, 5 min, 3 min, and 1 min can be selected) setting. After the truth value determination is ended, sampling data is fed back to a memory unit of the automatic control system and is transmitted to a mobile phone APP through a Bluetooth module. After the automatic control system has finished storing and transmitting the sampling data, the solenoid valve at the water outlet 20 is controlled to open for discharging water. So far, the first sampling work is completed.
[0041] E). After the first sampling work is ended, when a set sampling time interval is reached, the automatic control system starts the second sampling work. First, the solenoid valve at the water outlet 20 is closed to store water in the water sample circulation tank 24 again. and the first sampling work is repeated. After three times of sampling work are completed in sequence, the automatic control system performs data comparison on three sampling results, until three conditions of the detection indexes (pH value, temperature, electrical conductivity, redox potential, dissolved oxygen, and turbidity) meet sampling standard, in which a pH stability standard is within +0.1, a temperature stability index is within ±0.5 °C, an electrical conductivity stability index is within +10%, a redox potential stability index is within +10 mV or within +10%, a dissolved oxygen stability index is within +0.3 mg/L or within +10%, and a turbidity stability index is CIO NTU or within +10%. if the sampling standards are not met, the automatic control system will continue to carry out the next sampling.
[0042] F). After the sampling standards are met, the automatic control system will switch on the solenoid valve of the water outlet 20 to discharge water so as to cleanse the sampling bottles at the water outlet 20. After the cleansing is ended, a cover plate 26 above the low-disturbance sampling area 25 is opened, the sampling bottles are placed on the baffle plate 23 in the low-disturbance sampling area 25, and the cover plate 26 is closed.
[0043] G). The automatic control system controls to close the solenoid valve at the water outlet 20, and the flow is reduced to 0.1-0.5 L/min through the variable frequency controller 8. As the liquid level gradually rises and exceeds the mouths of the sampling bottles, the water samples slowly sink into the sampling bottles until overflowing the mouths of the sampling bottles (it can also be determined by the outflow from the water overflow port 21), and the sampling is completed. Then, the automatic control device opens the solenoid valve at the water outlet 20, and controls to turn off the sampling pump 5 and other monitoring devices. The sampling is ended, and the equipment in the well is lifted out.
[0044] The mechanism of the portable and intelligent low-disturbance sampling equipment and method of the present disclosure is that: the sampling equipment, the monitoring equipment, and the data storage and transmission are managed intelligently through the automatic control system, which can not only perform low-disturbance sampling, obtain a representative groundwater sample from a monitoring well completely and efficiently, and meet the requirements for the collection of detection samples of inorganic components, organic components, microorganisms, dissolved oxygen, and the like, but also analyze thc sampling data intelligently, and control a sampling process. so it is of great significance for groundwater pollution monitoring.
[0045] In this specification, specific examples are used to describe the principle and implementation manners of the present disclosure. The description of the embodiments above is merely intended to help understand the method and core idea of the present disclosure. In addition, those skilled in the art may make modifications based on the idea of the present disclosure with respect to the specific implementation manners and the application scope. In conclusion, the content of the present specification shall not be construed as a limitation to the present disclosure.
Claims (10)
- WHAT IS CLAIMED IS: 1. A portable and intelligent low-disturbance sampling equipment, comprising a power supply device, a low-disturbance water pumping device, a packing device, a downhole monitoring device, a truth value determination and sampling device and an automatic controller, wherein die low-disturbance water pumping device comprises a sampling pump, a sampling tube, electrical cables, and a variable frequency controller, and is used to perform a low-disturbance groundwater sampling task; the sampling pump is connected to the truth value determination and sampling device through the sampling tube; the packing device is arranged in a well and is used to pack a target water sampling layer from other non-target aquifers; die truth value determination and sampling device comprises a water sample circulation tank, a low-disturbance sampling area, mid a water quality detection probe, and is used for a water sample to circulate and determining whether a collected water sample is a true water sample of a stratum; the downhole monitoring device comprises a water level and water temperature monitoring probe and data lines, and is used to measure data of downhole water level and water temperature; and all of the low-disturbance water pumping device, the downhole monitoring device, and the truth value determination and sampling device need to be connected to the power supply device through the automatic controller by means of electrical cables or data lines.
- 2. The portable and intelligent low-disturbance sampling equipment according to claim 1, wherein a water outlet of the sampling pump is connected to a water entry of die sampling tube; a water exit of the sampling tube is communicated with the truth value determination and sampling device through the packing device; and the sampling pump is connected to the variable frequency controller through an electrical cable.
- 3. The portable and intelligent low-disturbance sampling equipment according to claim 1, wherein the sampling pump is a screw submersible pump, which has an outside diameter -5(1) mm.
- 4. The portable and intelligent low-disturbance sampling equipment according to claim 1, wherein the sampling tube comprises a polytetrafluoroethylene water tube and a steel wire rope and an electrical cable wrapped on the polytetrafluoroethylene water tube by a tetrafluoroethylene tape; and the sampling tube is controlled to retract and release by a winch.
- 5. The portable and intelligent low-disturbance sampling equipment according to claim 1, wherein the variable frequency controller is used to adjust the flow of a water pump, so as to realize high-flow-rate well flushing and low-flow-rate sampling, shorten a sampling assisting time, and reduce disturbance to a water sample.
- 6. The portable and intelligent low-disturbance sampling equipment according to claim 1, wherein the packing device comprises an inflatable packer, a high-pressure pipeline, and a gas supply source; the inflatable packer comprises an upper joint, a lower joint, a rubber cylinder, and a central tube; the rubber cylinder is sleeved outside of the central tube; the rubber cylinder is connected to the gas supply source through the high-pressure pipeline; the upper joint is threaded to a top of the central tube; the lower joint is threaded to a lower end of the central tube; the lower joint and the lower end of the central tube are sealed through an 0-shaped ring; and a tube body of the sampling tube penetrates through the upper joint, the lower joint, and the central tube.
- 7. The portable and intelligent low-disturbance sampling equipment according to claim 1, wherein a body of the truth value determination and sampling device is a box body in a cuboid shape; the box body is provided with a water intake, a water outtake, a water overflow port, and a monitoring window which are all circular; the water intake is formed in a central position of one side of the box body; the water outtake and the water overflow port are formed in an other side of the box body; the water overflow port is located at topside of the water outtake; the water intake is connected to a water exit of the sampling tube; the water outtake is provided with a solenoid valve to control water drainage; the water outtake and the water overflow port are connected with polytetrafluoroethylene drain pipes; and a water quality detection probe is placed in the monitoring window, and the monitoring window is sealed by using an 0-shaped ring.
- 8. The portable and intelligent low-disturbance sampling equipment according to claim 7, wherein a baffle plate is arranged inside the box body; the baffle plate is arranged transversely, so that the box body is divided into a water sample circulation tank and a low-disturbance sampling area; the water sample circulation tank is arranged at a bottom of the low-disturbance sampling area; the water quality detection probe is located in the water sample circulation tank; the water quality detection probe is used to perform truth value determination on a water sample; and several sampling bottles are placed in the low-disturbance sampling area for collecting water samples with low disturbance.
- 9. The portable and intelligent low-disturbance sampling equipment according to claim 7, wherein indexes that the water quality detection probe can detect comprise a pH value, temperature, electrical conductivity, redox potential, dissolved oxygen, and turbidity.
- 10. The portable and intelligent low-disturbance sampling equipment according to claim 7, wherein the automatic controller comprises a water pump control switch, a frequency adjustment unit of a frequency converter, a power supply unit for a monitoring probe, a liquid crystal display, a solenoid valve control unit, a memory system, an alann unit, and a Bluetooth module, wherein the water pump control switch is used to control a startup and shutdown of the sampling pump; the frequency adjustment unit of the frequency converter adopts an RS485 serial port to adjust a frequency of the variable frequency controller in order to control a flow rate of the sampling pump; the power supply unit for the monitoring probe comprises two power supply units for supplying power to the water level and water temperature monitoring probe and supplying power to the water quality detection probe; the water level and water temperature monitoring probe adopts four lines and has a voltage of 9 V. and the water quality detection probe adopts four lines and has a voltage of 12 V, both of which adopt RS485 serial ports; the solenoid valve control unit has a power supply voltage of 12V, and is used to control a startup and shutdown of the solenoid valve; the memory system is used to store water quality detection data obtained during sampling; the alarm unit is used to prompt an operator of a sampling process; the Bluctooth module can adopt an RS485/232 serial port for communication to transmit sampling and water quality detection data to a mobile phone APP for remote viewing; and the liquid crystal display is used to display the parameters comprising a pH value, temperature, conductivity, redox potential, dissolved oxygen, and turbidity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210918893.2A CN115266233A (en) | 2022-08-02 | 2022-08-02 | Portable intelligent low-disturbance sampling equipment |
| PCT/CN2022/116470 WO2024026961A1 (en) | 2022-08-02 | 2022-09-01 | Portable intelligent low-disturbance sampling apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB202302377D0 GB202302377D0 (en) | 2023-04-05 |
| GB2626386A true GB2626386A (en) | 2024-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2302377.3A Pending GB2626386A (en) | 2022-08-02 | 2022-09-01 | Portable intelligent low-disturbance sampling apparatus |
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| Country | Link |
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| GB (1) | GB2626386A (en) |
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| US5189909A (en) * | 1989-08-07 | 1993-03-02 | The Tsurumi-Seiki Co., Ltd. | Device for measuring properties of underground water and method therefor |
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| CN112729953A (en) * | 2020-12-30 | 2021-04-30 | 南京万德斯环保科技股份有限公司 | Underground water on-line monitoring and automatic sampling integrated device |
| CN114061649A (en) * | 2020-08-07 | 2022-02-18 | 中国环境科学研究院 | Automatic synchronous quick on-line monitoring equipment of groundwater quality of water level |
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2022
- 2022-09-01 GB GB2302377.3A patent/GB2626386A/en active Pending
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| US5189909A (en) * | 1989-08-07 | 1993-03-02 | The Tsurumi-Seiki Co., Ltd. | Device for measuring properties of underground water and method therefor |
| CN204612984U (en) * | 2015-04-28 | 2015-09-02 | 中国地质大学（武汉） | A kind of Groundwater Flow sampling overflow mechanism |
| CN108196021A (en) * | 2017-12-22 | 2018-06-22 | 中国地质科学院水文地质环境地质研究所 | A kind of underground water on-line monitoring, representative water sampling integration self-con-tained unit and its control method |
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| CN114061649A (en) * | 2020-08-07 | 2022-02-18 | 中国环境科学研究院 | Automatic synchronous quick on-line monitoring equipment of groundwater quality of water level |
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| GB202302377D0 (en) | 2023-04-05 |
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