CN113884474B - Portable underground water well flushing, sampling and heavy metal detection integrated device - Google Patents
Portable underground water well flushing, sampling and heavy metal detection integrated device Download PDFInfo
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- CN113884474B CN113884474B CN202111140751.XA CN202111140751A CN113884474B CN 113884474 B CN113884474 B CN 113884474B CN 202111140751 A CN202111140751 A CN 202111140751A CN 113884474 B CN113884474 B CN 113884474B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 183
- 238000001514 detection method Methods 0.000 title claims abstract description 124
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 60
- 238000005070 sampling Methods 0.000 title claims abstract description 51
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 41
- 238000003809 water extraction Methods 0.000 claims abstract description 33
- 238000011065 in-situ storage Methods 0.000 claims abstract description 21
- 238000004458 analytical method Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 239000003673 groundwater Substances 0.000 claims description 58
- 239000000463 material Substances 0.000 claims description 49
- 230000005284 excitation Effects 0.000 claims description 34
- 239000000523 sample Substances 0.000 claims description 34
- 239000013049 sediment Substances 0.000 claims description 20
- 238000004806 packaging method and process Methods 0.000 claims description 17
- 238000005273 aeration Methods 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 239000012528 membrane Substances 0.000 claims description 10
- 238000001506 fluorescence spectroscopy Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 238000000605 extraction Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000003895 groundwater pollution Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 5
- 239000002352 surface water Substances 0.000 description 4
- JJWSNOOGIUMOEE-UHFFFAOYSA-N Monomethylmercury Chemical compound [Hg]C JJWSNOOGIUMOEE-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 3
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 230000004048 modification Effects 0.000 description 3
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- 230000002452 interceptive effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 238000003968 anodic stripping voltammetry Methods 0.000 description 1
- QFSKIUZTIHBWFR-UHFFFAOYSA-N chromium;hydrate Chemical compound O.[Cr] QFSKIUZTIHBWFR-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
-
- 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
Abstract
The invention relates to a portable underground water well flushing, sampling and heavy metal detection integrated device which comprises a detection sensor, an underground water extraction device, an integrated pipeline and a control terminal, wherein the underground water extraction device is used for realizing well flushing, sampling and analysis, the detection sensor is used for detecting the total amount and the form of underground water heavy metal, the detection sensor is embedded into a reserved vacancy of the underground water extraction device, the upper end of the underground water extraction device is connected with the integrated cable, the integrated cable comprises an external cable pipe gallery, a water pipe and an air pipe, the cable and the air pipe in the external cable pipe gallery are connected with the control terminal, and the tail end of the water pipe is a water outlet. The invention can realize rapid and full underground water monitoring well flushing work and continuous and undisturbed underground water sampling work, and can further realize in-situ rapid detection of different forms of heavy metals in the underground water in parallel by multiple channels, thereby providing powerful data support for pollution prevention and control of the field and underground water monitoring.
Description
Technical Field
The invention relates to the technical field of underground water flushing, sampling and heavy metal detection, in particular to a portable underground water flushing, sampling and heavy metal detection integrated device.
Background
The ground water pollution form of the field is more serious, wherein the heavy metal pollution is more important. In order to effectively control further aggravation of ground groundwater pollution, building a nationwide groundwater environment monitoring system is one of urgent tasks for preventing and controlling the ground groundwater pollution.
At present, the monitoring of the groundwater environment mainly depends on the mode of site sampling and laboratory analysis to identify the content of pollutants. The existing groundwater sample collection mostly depends on Bei Leguan and other tools, samples are taken out through manual operation, the groundwater environment is disturbed greatly, the samples are easy to pollute, the physical labor is large, the problems that flushing is difficult to be sufficient, sediment cannot be discharged and the like exist, sampling errors are enlarged, the functions of in-situ detection of groundwater are not achieved, the groundwater pollution condition cannot be accurately identified, and scientific decision making is affected. The collected underground water sample detection is mostly analyzed by adopting large-scale equipment in an ectopic laboratory at present, and the defects of difficult sample transportation, long period, high cost and the like exist. Most portable heavy metal detection equipment is based on an anodic stripping voltammetry, an underground water sample needs to be collected to the ground, and the electrode is subjected to mercury film modification and other steps to detect through adding electrolyte and standard substances, so that only one heavy metal can be detected at a time, the operation is complex, the detection precision is poor, and in-situ detection and morphological analysis of the heavy metal cannot be realized. The heavy metal toxicity of the underground water sample mainly depends on the form of the heavy metal, but the device for detecting the total amount and the form of the in-situ integrated multichannel parallel heavy metal in the portable underground water is not reported yet, and a laser-induced molecular Fluorescence Spectroscopy (LIFs) is expected to realize the function.
Therefore, in the fields of ecology, environmental protection, pollution site restoration and the like, practitioners are urgent to need technical equipment integrating convenient, rapid, low-disturbance, continuous groundwater sampling and portable in-situ detection of high-precision groundwater heavy metals (particularly in different forms) so as to reasonably and scientifically guide and evaluate related works of groundwater pollution control in China.
Patent CN103245531a discloses a micro-disturbance passive groundwater sampler for water environment monitoring. The sampler comprises an upper water inlet flow stopping unit, a caliber conversion coupling head, a sample storage tube and a lower water inlet flow stopping unit; the top of the upper water inlet stop unit is provided with a lifting rope connecting hole, and then a top water outlet, an upper water storage pipe and an upper water inlet stop valve which are communicated are sequentially arranged downwards; the upper end interface of the caliber conversion coupling head is connected with the upper water inlet check valve, and the lower end interface is connected with the upper end interface of the sample storage tube; the lower water inlet stop unit is sequentially provided with a lower water storage pipe and a lower water inlet check valve which are communicated from top to bottom, and the lower water storage pipe is connected with the lower end of the sample storage pipe. Although the sampler can achieve micro-disturbance sampling, the sampler has no well washing function and still needs to rely on other tools for well washing. The sample is collected for a single time, the sample quantity is insufficient, and the device has no in-situ detection function of heavy metals (particularly forms), and has single function.
The invention patent with the application number of CN202011086456.6 discloses a measuring device for monitoring the heavy metal content of groundwater environment, which comprises a first mounting plate, a second mounting plate, a xenon lamp, an excitation monochromator grating and an emission monochromator grating, wherein the first mounting plate is positioned on the left side of the inner rear surface of a main body shell and is fixedly connected with the main body shell, and the second mounting plate is positioned on the right side of the inner rear surface of the main body shell and is close to the right side of the first mounting plate; the xenon lamp is arranged to generate excitation light to excite metal molecules in underground water in the sample cell, the measuring step is reduced, the conduction light path is optimized, the subsequent measurement is convenient, the excited emission light is led out to the second optical gate from the sample cell, passes through other optical gates, and is finally led into the photomultiplier for subsequent measurement. Although the device is a portable device, in-situ underground water in-situ detection cannot be realized, well flushing and sampling to the ground are needed by other tools, wherein an underground water sample is inevitably contacted with air and is easy to pollute. In addition, the device can not realize the detection of heavy metal forms, and has single function.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a portable underground water flushing, sampling and heavy metal detection integrated device.
The integrated device can effectively and rapidly wash the well, has the capability of discharging sediment in the well, can enable the well to be washed more fully, and enables the groundwater to rapidly meet the sampling requirement; the device can realize continuous undisturbed rapid sampling of the groundwater sample, the collected sample is not contacted with air and is not easy to be polluted, so that the sample has authenticity, and the device can be matched with the analysis of an ectopic laboratory to accurately identify the groundwater pollution condition; in addition, the invention aims to provide an in-situ detection function of heavy metals (particularly forms) in groundwater, which is beneficial to carrying out real-time in-situ detection on groundwater or surface water samples in polluted sites and other situations, and rapidly and accurately acquiring the contents of the heavy metals and the forms thereof in the water sample.
The aim of the invention can be achieved by the following technical scheme:
the invention provides a portable underground water well flushing, sampling and heavy metal detection integrated device which comprises a detection sensor, an underground water extraction device, an integrated pipeline and a control terminal, wherein the detection sensor is connected with the underground water extraction device;
the underground water extraction device is used for realizing well flushing, sampling and analysis, and the detection sensor is used for detecting the total heavy metal amount and the form of underground water;
the detection sensor is embedded in a reserved vacancy of the underground water extraction device,
the underground water extraction device is characterized in that an integrated cable is connected to the upper end of the underground water extraction device, an external cable pipe gallery, a water pipe and an air pipe are contained in the integrated cable, the cable and the air pipe in the external cable pipe gallery are connected with a control terminal, and the tail end of the water pipe is a water outlet.
In one embodiment of the invention, the groundwater extraction device comprises a pump body, an integrated packaging device and a water inlet chamber,
the top end of the pump body is connected with an integrated packaging module, a wire hole, a water hole and an air hole are arranged in the integrated packaging module, the water hole is communicated with a water pipe in an integrated cable, the air hole is communicated with an air pipe in the integrated cable, the wire hole is communicated with an external cable pipe gallery in the integrated cable,
the lower end of the pump body is connected with a water inlet chamber, a detachable air bag and an air chamber are arranged in the pump body, the air chamber wraps the air bag to form a main structure of the pump body,
the lower end of the air bag is communicated with the water inlet chamber, the upper end of the air bag is communicated with the water hole,
the upper and lower ends of the air bag are provided with water stopping devices,
the air holes are connected with the air cavity chamber and the air pipe gallery in an aligned mode, and the wire holes are connected with the inner cable pipe gallery in an aligned mode.
In one embodiment of the invention, the water inlet chamber is inverted L-shaped, and the water inlet chamber reserves an insertable detection sensor vacancy.
In one embodiment of the invention, the part connected with the pump body is a complete cylindrical water inlet chamber, and a semicircular water stop valve which is opened left and right is arranged below the complete cylindrical water inlet chamber. The semicircular water stop valves which are opened at the left and right are controlled by a miniature motor, and water stop glue is arranged at the boundaries of the semicircular water stop valves which are opened at the left and right. The semicircular water stop valve can be turned over by 180 degrees, the miniature motor is powered by a cable, and the cable is connected with a control terminal after passing through an internal cable pipe gallery, a wire hole and an external cable pipe gallery of the underground water extraction device.
In one embodiment of the invention, a reserved space for installing a detection sensor and a vertical water inlet chamber for flushing and sampling are arranged in parallel below the complete cylindrical water inlet chamber. The vertical water inlet chamber is inclined cylindrical, the bottom of the vertical water inlet chamber is provided with a rotational flow blade of the underground water extraction device, the side wall of the vertical water inlet chamber is provided with aeration holes, the aeration holes are connected with the inside of the gas pipe gallery, the gas pipe gallery is formed by the inner wall and the outer wall of the vertical water inlet chamber, and the gas pipe gallery is connected with the air holes in the packaging integrated module.
In one embodiment of the invention, the pump body is cylindrical, preferably made of polytetrafluoroethylene, and is threaded up and down for connection between the integrated modules.
In one embodiment of the invention, the pump body top end is connected with the integrated packaging module through a thread buckle, and the integrated packaging module is of a detachable packaging type. The lower end of the pump body is connected with the water inlet chamber through threads. Washers are arranged at the upper and lower interfaces of the pump body to prevent water from entering and exiting.
In one embodiment of the invention, the water stopping devices arranged at the upper end and the lower end of the air bag are water stopping ball valves.
In one embodiment of the invention, the detection sensor is LIFs sensor, and comprises a shell, a round table, a sediment particle filter screen, a detection sensor cyclone blade, a sensitive film material, a laser diode, an optical lens group, an excitation light path, a detection system, a fluorescence detector and a cable;
the lower end of the shell is connected with a circular truncated cone, a sediment particle filter screen is arranged at the bottom of the circular truncated cone and can filter residual sediment, particles and the like in groundwater, and a detachable detection sensor swirl vane is arranged in the middle of the circular truncated cone;
the excitation light path and the detection system are positioned in the shell, a waterway for groundwater flow is arranged between the shell and the excitation light path and the detection system,
the excitation light path and the detection system are an inner cylindrical sleeve and an outer cylindrical sleeve, the excitation diode is fixed on the inner cylindrical sleeve, the optical lens group and the fluorescence detector are positioned in the inner cylindrical sleeve,
the sensitive film material is arranged at the bottom of the excitation light path and the detection system, the sensitive film material can be combined with heavy metal, fluorescence with specific wavelength is generated by excitation of the laser diode, and the fluorescence detector is positioned at the terminal of the optical lens group and used for detecting molecular fluorescence;
the cables connected with the laser diode pass through the gaps of the inner cylindrical sleeve and the outer cylindrical sleeve, and the cables connected with the fluorescence detector are connected with the control terminal after passing through the inner cable gallery, the wire hole and the outer cable gallery of the underground water extraction device. The cable connected with the fluorescence detector is an optical fiber and is mainly used for transmitting fluorescence signals. The fluorescence data and the excitation light source obtained by the detector are connected with the control terminal through cables.
In one embodiment of the invention, the sensitive film material is fastened to the excitation light path and the detection system by means of a sensitive film material fastener.
In one embodiment of the invention, the sensitive membrane material is arranged that a plurality of sensitive materials are distributed on the membrane material in a fan-shaped form, so that the detection of the total amount and the form of different heavy metals is realized, the lower part of the sensitive membrane material can be contacted with flowing groundwater, and the upper part of the sensitive membrane material is provided with a glass sheet, so that the groundwater can be prevented from entering a detection system.
In one embodiment of the invention, the sensitive material can be a plurality of sensitive materials which can be specifically combined with metal ions, methylmercury, hexavalent chromium, trivalent arsenic and other substances to generate molecular fluorescence, such as a macromolecule sensitive fluorescent material modified based on a small molecule fluorescent probe and the like.
In one embodiment of the present invention, the laser diode may select laser diodes of different excitation wavelengths according to the number of channels and the sensitive material to be excited and the heavy metal species to be detected. The multi-channel detection can be realized by arranging a plurality of laser diodes, and the laser diodes accurately excite the corresponding sensitive film materials through the angle adjustment of the laser diodes.
In one embodiment of the invention, the excitation light path and the detection system are integrated sensors, and the excitation light path and the detection system are in threaded connection with the shell and are in a detachable structure.
In one embodiment of the invention, the housing is a cylindrical housing.
In one embodiment of the invention, the bottom end of the shell is provided with an internal thread, the top end of the round table is provided with an external thread matched with the internal thread, the round table is connected with the shell through threads, and a detachable structure is arranged between the round table and the shell.
In one embodiment of the invention, the upper end of the shell is provided with threads which can be matched with the reserved space of the groundwater extraction device and are assembled into the device through the threads.
In one embodiment of the invention, a water stop valve is arranged below the sediment particle filter screen.
In the invention, the detection sensor can be embedded into a clamping groove reserved by the groundwater extraction device through threads. The detection sensor and the groundwater extraction device together form a probe which is placed into the groundwater monitoring well. The probe is connected with the control terminal through an integrated pipeline.
In one embodiment of the invention, the integrated line is wound on a spool.
In one embodiment of the invention, the wire spool comprises two wire spool plates which are opposite to each other, the two wire spool plates are connected through a bearing, the integrated pipeline is wound on the bearing of the wire spool, and the two wire spool plates are connected through a wire spool handle.
In one embodiment of the invention, two holes are further formed in two ends of the wire spool plate, the water pipe extends out through one hole, and the air pipe and the external cable gallery are connected with the control terminal through the other hole.
In one embodiment of the present invention, a spool switch is further provided on the spool plate.
In one embodiment of the invention, the integrated pipeline is provided with scales, so that the probe lowering distance can be monitored.
In the invention, the water outlet arranged at the tail end of the water pipe can be connected with a sampling bottle and the like for undisturbed collection of the groundwater sample. The gas pipe gallery is mainly used for conveying gas, compressing and expanding an air bag and aerating in a well flushing process, and the cable mainly comprises optical fibers and electric wires for transmitting fluorescence spectrum signals and supplying energy. The gas piping lane and the cable are connected with a control analysis terminal.
In one embodiment of the invention, a spectrometer, a power supply, an air compressor, a workstation and a man-machine intelligent interaction interface structure are arranged in the control terminal. The spectrometer is used for collecting fluorescent signals, the air compressor is used for generating and exhausting air cavity gas and aeration gas, and the workstation is used for operation of the whole system, automatic control and data analysis. The interactive interface is used for displaying data and inputting control commands.
The invention can control the whole system by controlling the analysis terminal, and comprises the processes of well flushing, sampling, detection and the like. The water intake is carried out through extraction device in a disturbance-free manner, in the well flushing process, the water inlet end aeration device is matched with the cyclone blade in an aeration manner, so that water and sediment can be effectively mixed, sediment in the well is discharged, the sediment is prevented from disturbing groundwater samples and detection, the well flushing is finished, and the device is used for disturbance-free sampling after backwater. The detection data of the form of the total heavy metal can be obtained by detecting the underground water in parallel and in situ through the detection sensor probe.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention can collect groundwater samples continuously, non-perturbed, pollution-free and fast.
(2) The invention adopts the aeration device, can fully wash the well, effectively discharge sediment and particulate matters generated in the well construction and well monitoring retention processes, and enable the groundwater quality to more rapidly meet the sampling requirement.
(3) The invention is internally provided with the detection sensing probe of which the total heavy metal content in the groundwater comprises a form, so that the multichannel parallel in-situ detection of heavy metals in the groundwater can be realized, the heavy metal content in the water quality such as ground water or surface water can be accurately identified, the heavy metal pollution condition of the groundwater or surface water can be rapidly identified, and scientific real-time data support can be provided for restoration and pollution control of the groundwater.
(4) The invention can realize rapid and full underground water monitoring well flushing work and continuous and undisturbed underground water sampling work, and can further realize the multi-channel parallel in-situ rapid detection of heavy metals in different forms such as total heavy metals in underground water and hexavalent chromium, trivalent arsenic, methyl mercury and the like, thereby providing powerful data support for pollution prevention and control of sites and underground water monitoring.
(5) The invention has simple structure, high integration, portability and effective control of manufacturing cost, and compared with a laboratory large-scale analysis instrument and the existing portable detection device, the invention can realize the on-site multichannel parallel in-situ rapid detection and has simpler operation.
In conclusion, the device can effectively and rapidly wash the well, realize continuous undisturbed rapid sampling, further provide an in-situ detection function of heavy metals (particularly forms) in the groundwater, and be favorable for carrying out real-time in-situ detection on groundwater or surface water samples in situations such as polluted sites, and rapidly and accurately obtain the contents of the heavy metals and the forms thereof in the water sample.
Drawings
FIG. 1 is a schematic diagram of a portable multi-channel parallel in-situ detection device for underground water flushing, sampling, heavy metal amount and morphology in embodiment 1;
FIG. 2 is a schematic diagram of the detection sensor shown at A in FIG. 1;
FIG. 3 is a schematic view of the groundwater extraction device shown at B in FIG. 1;
reference numerals in the drawings: 101-water stop valve and 102-water stop valve; a-detecting sensor; b-an underground water extraction device; 2-an integrated pipeline; 201-external cable porch; 202-a water pipe; 203-trachea; 3-a wire reel handle; 4-a wire spool switch; 5-wire reels; 6-a water outlet; 7-control terminal. 8-a sediment particle filter screen; 9-checking the sensor swirl vanes; 10-a sensitive film material buckle; 11-a sensitive film material; 12-a laser diode; 13-an optical lens group; 14-excitation light path and detection system; 15-fluorescence detector; 16-cable; 17-a housing; 18-waterway. 19-a water stop ball valve; 20-an air chamber; 21-an internal cable gallery; 22-gas piping lane; 23-an air bag; 24-a water inlet chamber; 25-a pump body; 26-aeration holes; 27-a rotational flow blade of an underground water extraction device; 28-integrated packaging means; 2801-pores; 2802-water holes; 2803-wire holes.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
In the following embodiments, unless otherwise specified, functional components are shown as conventional component structures in the art for achieving the corresponding functions.
Example 1
Referring to fig. 1, 2 and 3, the present embodiment provides a portable integrated device for underground water flushing, sampling and heavy metal detection, which comprises a detection sensor a, an underground water extraction device B, an integrated pipeline 2 and a control terminal 7; the underground water extraction device B is used for realizing well flushing, sampling and analysis, and the detection sensor A is used for detecting the total amount and the form of underground water heavy metals; the detection sensor A is embedded into a reserved vacancy of the underground water extraction device B, the upper end of the underground water extraction device B is connected with an integrated cable 2, the integrated cable 2 comprises an external cable duct 201, a water pipe 202 and an air pipe 203, the cable and the air pipe 203 in the external cable duct 201 are connected with the control terminal 7, and the tail end of the water pipe 202 is a water outlet 6.
Specifically, referring to fig. 3, in this embodiment, the underground water extraction device B includes a pump body 25, an integrated packaging device 28, and a water inlet chamber 24, the top end of the pump body 25 is connected with the integrated packaging module 28, a wire hole 2803 and a water hole 2802 are arranged in the integrated packaging module 28 and are communicated with a gas hole 2801, the water hole 2802 is communicated with a water pipe 202 in the integrated cable 2, the gas hole 2801 is communicated with a gas pipe 203 in the integrated cable 2, the wire hole 2803 is communicated with an external cable gallery 201 in the integrated cable 2, the lower end of the pump body 25 is connected with the water inlet chamber 24, a detachable air bag 23 and a gas chamber 20 are arranged in the pump body 25, the air chamber 20 wraps the air bag 23, a main structure of the pump body is formed, the lower end of the air bag 23 is communicated with the water inlet chamber 24, the upper end and the water hole 2802 are respectively, the gas hole 2801 is connected with the air chamber 20 and the gas pipe gallery 22 in alignment, and the wire hole 2803 is connected with the internal cable 21 in alignment.
Specifically, referring to fig. 3, in this embodiment, the water inlet chamber 24 is inverted "L", and the water inlet chamber 24 reserves a space for the insertable detection sensor a.
The pump body 25 is connected with a complete cylindrical water inlet chamber, and a semicircular water stop valve 102 which is opened left and right is arranged below the complete cylindrical water inlet chamber. The semicircular water stop valves 102 which are opened at the left and right are controlled to be opened and closed by a micro motor, and water stop glue is arranged at the boundary of the semicircular water stop valves 102 which are opened at the left and right. The semicircular water stop valve 102 can be turned over by 180 degrees, the miniature motor is powered by a cable, and the cable is connected with the control terminal 7 after passing through the inner cable gallery 21, the wire hole 2803 and the outer cable gallery 201 of the underground water extraction device B. The reserved space for installing the detection sensor A and the vertical water inlet chamber for well flushing and sampling are arranged in parallel below the complete cylindrical water inlet chamber. The vertical water inlet chamber is inclined cylindrical, the bottom of the vertical water inlet chamber is provided with a rotational flow blade 27 of the underground water extraction device, the side wall of the vertical water inlet chamber is provided with aeration holes 26, the aeration holes 26 are connected with the inner part of the gas pipe gallery 22, the gas pipe gallery 22 is formed by the inner wall and the outer wall of the vertical water inlet chamber, and the gas pipe gallery 22 is connected with an air hole 2801 in the packaging integrated module.
In this embodiment, the pump body 25 is cylindrical, preferably made of polytetrafluoroethylene, and is threaded up and down for connection between the integrated modules.
In this embodiment, the top end of the pump body 25 is connected to the integrated package module 28 through a threaded fastener, and is a detachable package. The lower end of the pump body 25 is connected with the water inlet chamber 24 through threads. Washers are arranged at the upper and lower interfaces of the pump body 25 to prevent water from entering and exiting.
In this embodiment, the water stop devices provided at the upper and lower ends of the air bag 23 are water stop ball valves 19.
Referring to fig. 2, in this embodiment, the detection sensor a is a LIFs sensor, and the detection sensor a includes a housing 17, a circular truncated cone, a silt particle filter screen 8, a detection sensor swirl vane 9, a sensitive film material 11, a laser diode 12, an optical lens group 13, an excitation light path and detection system 14, a fluorescence detector 15, and a cable 16; the lower end of the shell 17 is connected with a circular truncated cone, a sediment particle filter screen 8 is arranged at the bottom of the circular truncated cone and can filter residual sediment, particles and the like in groundwater, and a detachable detection sensor swirl vane 9 is arranged in the middle of the circular truncated cone; the excitation light path and the detection system 14 are positioned in the shell 17, a waterway 18 for flowing groundwater is arranged between the shell 17 and the excitation light path and the detection system 14, the excitation light path and the detection system 14 are inner and outer cylindrical sleeves, the excitation diode 12 is fixed on the inner cylindrical sleeve, the optical lens group 13 and the fluorescence detector 15 are positioned in the inner cylindrical sleeve, the sensitive film material 11 is arranged at the bottom of the excitation light path and the detection system 14, the sensitive film material 11 can be combined with heavy metals, fluorescence with specific wavelength is generated by excitation of the laser diode 12, and the fluorescence detector 15 is positioned at the terminal end of the optical lens group 13 for detection of molecular fluorescence;
the cables connected with the laser diode 12 pass through the gap between the inner cylindrical sleeve and the outer cylindrical sleeve, and the cables 16 connected with the fluorescence detector 15 are connected with the control terminal 7 after passing through the inner cable gallery 21, the wire hole 2803 and the outer cable gallery 201 of the underground water extraction device B. The cable 16 connected to the fluorescence detector 15 is an optical fiber, and is mainly used for signal transmission. The fluorescence data and excitation light obtained by the detector are connected with the control terminal through cables.
Referring to fig. 2, in this embodiment, the sensitive film material 11 is fixed on the excitation light path and the detection system 14 by the sensitive film material buckle 10.
Referring to fig. 2, in this embodiment, the sensitive film material 11 is configured such that a plurality of sensitive materials are distributed on the film material in a fan-shaped manner, so as to realize detection of total amounts and forms of different heavy metals, and the sensitive film material 11 can contact with flowing groundwater below and has a glass sheet above, so that groundwater can be prevented from entering the detection system.
In this embodiment, the sensitive material may be a plurality of sensitive materials capable of specifically binding with metal ions, methylmercury, hexavalent chromium, trivalent arsenic and other substances to generate molecular fluorescence, for example, a high molecular sensitive fluorescent material modified based on a small molecular fluorescent probe, and the like.
Referring to fig. 2, in this embodiment, the laser diode 12 may select laser diodes with different excitation wavelengths according to the number of channels and the sensitive materials to be excited and the heavy metal species to be detected. The multi-channel detection can be realized by arranging a plurality of laser diodes, and the laser diodes 12 can accurately excite the corresponding sensitive film materials through the angle adjustment of the laser diodes 12. Only two are shown in the schematic diagram 2, and the number is not limited to 2.
In this embodiment, the excitation light path and the detection system 14 are integrated sensors, and the excitation light path and the detection system 14 are in threaded connection with the housing 17, so that they are in a detachable structure.
In this embodiment, the housing 17 is a cylindrical housing.
In this embodiment, the bottom of the housing 17 is provided with an internal thread, the top of the round table is provided with an external thread matched with the internal thread, the round table is connected with the housing 17 through threads, and a detachable structure is arranged between the round table and the housing 17.
In this embodiment, the upper end of the housing 17 is provided with a thread, which can be matched with the reserved space of the groundwater extraction device B, and is assembled into the device through the thread.
In this embodiment, a water stop valve 101 is disposed below the silt particle filter screen 8.
In this embodiment, the detection sensor a may be screwed into a slot reserved in the groundwater extraction device B. The detection sensor A and the groundwater extraction device B jointly form a probe placed in a groundwater monitoring well. The probe is connected to a control terminal 7 via an integrated line 2.
In this embodiment, the integrated circuit 2 is wound around the spool 5.
In this embodiment, the wire spool 5 includes two wire spool boards opposite to each other, the two wire spool boards are connected through bearings, the integrated pipeline 2 is wound on the bearings of the wire spool 5, and the two wire spool boards are connected through the wire spool handle 3.
In this embodiment, two holes are further formed at two ends of the wire spool plate, the water pipe 202 extends out through one hole, and the air pipe 203 and the external cable gallery 201 are connected to the control terminal 7 through another hole.
In this embodiment, the spool plate is further provided with a spool switch 4.
In this embodiment, the integrated pipeline 2 is provided with scales, so that the lowering distance of the probe can be monitored.
In this embodiment, the water outlet 6 at the end of the water pipe 202 may be connected to a sampling bottle or the like, for undisturbed collection of the groundwater sample. The gas pipe gallery is mainly used for conveying gas, compressing and expanding an air bag and aerating in a well flushing process, and the cable mainly comprises optical fibers and electric wires for transmitting fluorescence spectrum signals and supplying energy. The gas piping lane and the cable are connected with a control analysis terminal.
In this embodiment, the control terminal 7 is internally provided with a spectrometer, a power supply, an air compressor, a workstation and a man-machine intelligent interaction interface structure. The spectrometer is used for collecting fluorescent signals, the air compressor is used for generating and exhausting air cavity gas and aeration gas, and the workstation is used for operation of the whole system, automatic control and data analysis. The interactive interface is used for displaying data and inputting control commands.
In this embodiment, the whole system can be controlled by controlling the analysis terminal, including the processes of flushing, sampling, detecting, and the like. The water intake is carried out through extraction device in a disturbance-free manner, in the well flushing process, the water inlet end aeration device is matched with the cyclone blade in an aeration manner, so that water and sediment can be effectively mixed, sediment in the well is discharged, the sediment is prevented from disturbing groundwater samples and detection, the well flushing is finished, and the device is used for disturbance-free sampling after backwater. The detection data of heavy metal weight including morphology can also be obtained through the parallel in-situ detection of the underground water by the detection sensor probe.
Example 2
The present embodiment provides a method for using the detection device of embodiment 1.
The portable underground water flushing, sampling, heavy metal total amount and form multichannel parallel in-situ detection device is as described in example 1 and with reference to fig. 1, 2 and 3.
The using method specifically comprises the following steps:
(1) And taking out the components on site, opening the truncated cone-shaped part at the bottom end of the detection sensor A, opening the buckle, aligning and putting the sensitive film material according to the reserved position, and packaging the truncated cone-shaped part, as shown in figure 2.
(2) After the components are assembled on site, the probe part of the device is vertically placed into a groundwater monitoring well.
(3) And a command is issued through the control terminal, and the miniature motor is controlled to close the water stop valve, so that the part A of the detection sensor is completely closed.
(4) According to the monitoring needs, can carry out the well flushing operation in advance, through control analysis terminal, the corresponding well flushing command is issued, the air compressor machine carries out the control of gas, carry out gaseous transport and discharge through the gas piping lane, when gas is discharged from the air cavity room, the air cavity room forms negative pressure environment, the gasbag inflation, groundwater gets into through falling "L" water inlet chamber entering gasbag, aeration hole operation is to the groundwater that rotates behind the swirl vane simultaneously, make silt form the air supporting, can not deposit in the well, but get into the gasbag inside along with groundwater altogether, at this moment, the stagnant water ball valve of gasbag below is opened by groundwater, the upper side stagnant water ball valve closes under the effect of gravity, afterwards, charge gas in the air cavity room, form high-pressure environment, under the pressure effect of air cavity, the gasbag begins to shrink, store with the groundwater in the gasbag under the effect of pressure, because the shutoff of below stagnant water ball valve, only can top stagnant water ball valve, thereby discharge along the water pipe. At this time, due to the combination of the aeration device at the water inlet and the cyclone blades, sediment can be discharged sufficiently, the quality of well washing is improved, and the requirement of underground water sampling is met.
(5) After well flushing is finished, after groundwater backwater, analysis and sampling work can be carried out according to the need, wherein the sampling work steps are the same as those of the step (4), the method can carry out undisturbed, rapid and continuous sampling, and a sampling bottle with a pre-added protective agent is connected with a sampling port for collecting samples.
(6) Before groundwater sampling, in-situ detection of heavy metal total amount and form in groundwater can also be carried out, the specific steps are that a control terminal is used for controlling a micro motor to be opened, a water stop valve at the bottom of a detection sensor is closed rightwards (a water inlet cavity is formed to be closed), groundwater is extracted through a sampling and sampling device above, the groundwater enters the detection sensor under the action of an air bag, is filtered under the action of a sediment particle filter screen, is fully rotated under the action of a cyclone blade, is fully and uniformly contacted with a sensitive film material in an LIFs sensor, and is discharged through a water outlet, the sensitive film material is fully contacted with the groundwater, heavy metal components in the groundwater are enriched and captured, the heavy metal components are specifically combined with the sensitive film material, then laser diodes with different wavelengths are controlled to sequentially excite the sensitive film material through glass, and the sensitive material after specific combination with the heavy metal emits characteristic molecular fluorescence under the excitation of the laser diode with corresponding wavelength. Molecular fluorescence is captured by a detector after passing through an optical lens group, data are transmitted into a control terminal through optical fibers, a spectrometer and a workstation in the control terminal process and analyze the collected data, qualitative identification is carried out through wavelength, fluorescence is converted into content through a quantitative algorithm, and multichannel parallel detection of the total amount and the form of heavy metals in underground water is realized.
(7) After the single analysis is finished, the probe can be taken out, all the parts are disassembled for cleaning, wherein the sensitive membrane material can be opened to be buckled, and a new membrane material is replaced after being taken down, so that the detection of a new underground water monitoring well and the detection of other heavy metal components are realized.
(8) After well flushing, sampling, analysis and detection are completed, all the components are disassembled and are contained in a special containing box, so that portability can be realized.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (7)
1. The portable underground water well flushing, sampling and heavy metal detection integrated device is characterized by comprising a detection sensor (A), an underground water extraction device (B), an integrated cable (2) and a control terminal (7);
the underground water extraction device (B) is used for realizing well flushing, sampling and analysis, and the detection sensor (A) is used for detecting the total amount and the form of the heavy metals in the underground water;
the detection sensor (A) is embedded in a reserved vacancy of the underground water extraction device (B),
the underground water extraction device is characterized in that an integrated cable (2) is connected to the upper end of the underground water extraction device (B), an external cable pipe gallery (201), a water pipe (202) and an air pipe (203) are arranged in the integrated cable (2), the cable and the air pipe (203) in the external cable pipe gallery (201) are connected with a control terminal (7), and a water outlet (6) is arranged at the tail end of the water pipe (202);
the detection sensor (A) is a laser-induced molecular fluorescence spectroscopy sensor,
the detection sensor (A) comprises a shell (17), a round table, a sediment particle filter screen (8), a detection sensor cyclone blade (9), a sensitive film material (11), a laser diode (12), an optical lens group (13), an excitation light path, a detection system (14), a fluorescence detector (15) and a cable (16);
the lower end of the shell (17) is connected with a circular truncated cone, a sediment particle filter screen (8) is arranged at the bottom of the circular truncated cone, and a detachable detection sensor swirl vane (9) is arranged in the middle of the circular truncated cone;
the excitation light path and the detection system (14) are positioned in a shell (17), a waterway (18) for groundwater to flow is arranged between the shell (17) and the excitation light path and the detection system (14),
the excitation light path and the detection system (14) are inner and outer cylindrical sleeves, the laser diode (12) is fixed on the inner cylindrical sleeve, the optical lens group (13) and the fluorescence detector (15) are positioned in the inner cylindrical sleeve,
the sensitive film material (11) is arranged at the bottom of the excitation light path and the detection system (14), the sensitive film material (11) can be combined with heavy metal, fluorescence with specific wavelength is generated by excitation of the laser diode (12), and the fluorescence detector (15) is positioned at the terminal end of the optical lens group (13) and used for detecting molecular fluorescence;
the cables connected with the laser diode (12) pass through the gap between the inner cylindrical sleeve and the outer cylindrical sleeve, and the cables (16) connected with the fluorescence detector (15) are connected with the control terminal (7) after passing through the inner cable gallery (21), the wire hole (2803) and the outer cable gallery (201) of the underground water extraction device (B);
the sensitive membrane material (11) is formed by distributing a plurality of sensitive materials on the membrane material in a fan-shaped mode, so that the detection of the total amount and the form of different heavy metals is realized, the lower part of the sensitive membrane material (11) is contacted with flowing underground water, and a glass sheet is arranged above the sensitive membrane material;
the detection sensor (A) and the underground water extraction device (B) jointly form a probe which is placed into the underground water monitoring well, and the probe is connected with the control terminal (7) through the integrated cable (2); the integrated cable (2) is provided with scales for monitoring the lowering distance of the probe;
the underground water extraction device (B) comprises a pump body (25) and a water inlet chamber (24), the part, connected with the pump body (25), of the water inlet chamber (24) is a complete cylindrical water inlet chamber, a semicircular water stop valve (102) is arranged below the complete cylindrical water inlet chamber, the semicircular water stop valve (102) is controlled to be switched on and off by a miniature motor, and the semicircular water stop valve (102) can be turned over by 180 degrees;
when the device is used, the miniature motor is controlled to close the water stop valve, so that the detection sensor (A) is completely closed, and well flushing operation is performed; and controlling the water stop valve at the bottom of the detection sensor to be opened, and closing the water stop valve above the water stop valve rightwards to form a closed state of the water inlet chamber so as to perform in-situ detection on the total amount and the form of heavy metals in underground water.
2. The portable integrated device for underground water flushing, sampling and heavy metal detection according to claim 1, wherein the underground water extraction device (B) further comprises an integrated packaging module (28),
the top end of the pump body (25) is connected with an integrated packaging module (28), a wire hole (2803), a water hole (2802) and an air hole (2801) are arranged in the integrated packaging module (28), the water hole (2802) is communicated with a water pipe (202) in the integrated cable (2), the air hole (2801) is communicated with an air pipe (203) in the integrated cable (2), the wire hole (2803) is communicated with an external cable gallery (201) in the integrated cable (2),
the lower end of the pump body (25) is connected with a water inlet chamber (24), a detachable air bag (23) and an air chamber (20) are arranged in the pump body (25), the air chamber (20) wraps the air bag (23),
the lower end of the air bag (23) is communicated with the water inlet chamber (24), the upper end of the air bag (23) is communicated with the water hole (2802),
the upper end and the lower end of the air bag (23) are respectively provided with a water stopping device,
the air hole (2801) is connected with the air cavity chamber (20) and the air pipe gallery (22) in an aligned mode, and the wire hole (2803) is connected with the inner cable pipe gallery (21) in an aligned mode.
3. The portable integrated device for underground water flushing, sampling and heavy metal detection according to claim 2, wherein the water inlet chamber (24) is of an inverted L shape, and the water inlet chamber (24) is reserved with a vacant position of an insertable detection sensor (A).
4. The portable underground water flushing, sampling and heavy metal detection integrated device according to claim 1, wherein a reserved space for installing a detection sensor and a vertical water inlet chamber for flushing and sampling are arranged in parallel below the complete cylindrical water inlet chamber; the vertical water inlet chamber is inclined cylindrical, a swirl vane (27) of the underground water extraction device is arranged at the bottom of the vertical water inlet chamber, an aeration hole (26) is formed in the side wall of the vertical water inlet chamber, the aeration hole (26) is connected with the inside of the gas pipe gallery, the gas pipe gallery is formed by the inner wall and the outer wall of the vertical water inlet chamber, and the gas pipe gallery is connected with the air holes in the packaging integrated module.
5. The portable integrated device for underground water flushing, sampling and heavy metal detection according to claim 1, wherein the sensitive film material (11) is fixed on the excitation light path and the detection system (14) through a sensitive film material buckle (10).
6. The portable underground water flushing, sampling and heavy metal detection integrated device according to claim 1, wherein a spectrometer, a power supply, an air compressor, a workstation and a man-machine intelligent interaction interface structure are arranged inside the control terminal (7).
7. The portable underground water flushing, sampling and heavy metal detection integrated device according to claim 1, wherein the integrated cable (2) is wound on a wire spool (5).
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