Water body-sediment pesticide in-situ synchronous monitoring device

Abstract

The invention discloses a water body-sediment pesticide in-situ synchronous monitoring device, and relates to the technical field of monitoring devices.The water body-sediment pesticide in-situ synchronous monitoring device comprises a floating body platform with a through hole formed in the middle, a sediment sampling assembly is arranged at the position of the through hole in the floating body platform, and a supporting frame is fixedly connected to the upper portion of the floating body platform; a water sampling component is mounted on the right side of the upper surface of the floating platform; the water body sampling assembly comprises at least three groups of second water pumps, the input ends of the three groups of second water pumps are fixedly connected with third connecting pipes, the lengths of the three third connecting pipes are different, a bracket is fixedly connected to the right front side of the upper surface of the supporting frame, and three groups of fourth connecting pipes are clamped in the bracket; the lower ends of the three fourth connecting pipes are fixedly connected with the output ends of the three second water pumps through flanges correspondingly. The device has the advantages that surface, middle and bottom water bodies are respectively collected through three groups of third connecting pipes with different lengths, and multi-dimensional data in the vertical direction are covered, so that one-sidedness of a single depth is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of monitoring devices, in particular to a water-sediment pesticide in-situ synchronous monitoring device. BACKGROUND

[0002] Due to the modernization of industrial production, a large amount of fertilizers and pesticides are needed in the process of agricultural production. The widespread use of pesticides in agricultural production leads to their entry into the water environment through runoff, infiltration and other ways, and accumulation in water and sediments, which poses a potential threat to the ecological system and human health.

[0003] In the existing monitoring technology, water sampling is mostly single-point instantaneous sampling, and sediment sampling needs to use a core sampler separately. The two operations are independent, it is difficult to ensure that the samples are collected from the same spatial position, leading to poor data correlation. Moreover, water sampling is mostly single-depth, and sediment coring needs to be processed in sections, which makes it difficult to reflect the migration and transformation rules of pesticides at the "water-sediment interface". Therefore, the present application provides a water-sediment pesticide in-situ synchronous monitoring device. SUMMARY

[0004] The present application aims to provide a water-sediment pesticide in-situ synchronous monitoring device to solve the problem of poor data correlation caused by the independent operation of water sampling and sediment sampling in the existing monitoring technology.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A water-sediment pesticide in-situ synchronous monitoring device, comprising a floating platform with a through hole in the middle, a sediment sampling assembly is arranged inside the floating platform at the position of the through hole, a support frame is fixedly connected above the floating platform, a water sampling assembly is installed on the right side of the upper surface of the floating platform, at least four mounting seats are fixedly connected to the front side of the support frame, an extraction column is detachably connected inside each mounting seat, a sediment extraction assembly is installed inside the support frame on the upper side of the floating platform, and a detection assembly is installed on the front side of the bottom of the support frame.

[0007] The water body sampling assembly comprises at least three groups of second water pumps, the input ends of the three groups of second water pumps are fixedly connected with third connecting pipes, the lengths of the three third connecting pipes are different from each other, a support is fixedly connected to the upper surface of the support frame at the front right side, three fourth connecting pipes are clamped in the support, the lower ends of the three fourth connecting pipes are fixedly connected with the output ends of the three groups of second water pumps through flanges, and the ends of the three fourth connecting pipes away from the second water pumps extend into the interiors of the three extraction columns respectively.

[0008] The support frame is fixedly connected above the floating body platform, penetrating shaft type linear stepping motors are fixedly connected to the bottom of the support frame at the left and right sides, lifting lead screws are threadedly connected in the interiors of the two penetrating shaft type linear stepping motors, the bottom ends of the two lifting lead screws are connected with the sediment sampling assembly, a guide rod is slidingly connected to the rear middle part of the support frame, and the bottom end of the guide rod is fixedly connected with the sediment sampling assembly.

[0009] A liquid tank for synchronously storing purified water and eluent is fixedly connected to the middle part of the upper surface of the support frame, a main liquid inlet pipe is fixedly connected to the front side of the liquid tank, fifth connecting pipes same in number with the extraction columns are fixedly connected above the main liquid inlet pipe, and the ends of the four fifth connecting pipes extend into the interiors of the four extraction columns respectively.

[0010] A jacking rod is fixedly connected to the middle part of the bottom surface of the support frame, a microswitch is fixedly connected to the middle part of the bottom surface of the jacking rod, and a control box is fixedly connected to the right side of the upper surface of the support frame.

[0011] The sediment extraction assembly comprises two moving guide rails and a first electric telescopic rod, the two moving guide rails are fixedly connected to the left and right sides of the upper surface of the floating body platform, an extraction frame is slidingly connected above the two moving guide rails through sliding blocks, two ultrasonic oscillators are fixedly installed in the interior of the extraction frame, the first electric telescopic rod is fixedly connected to the upper surface of the floating body platform and located at the left side of the extraction frame, and the output end of the first electric telescopic rod is fixedly connected with the left side of the extraction frame through a connecting piece.

[0012] The sediment extraction assembly further comprises a first water pump and a wastewater frame, the first water pump is fixedly connected to the left side of the upper surface of the support frame, a first connecting pipe is fixedly connected to the output end of the first water pump, the end of the first connecting pipe extends into the interior of the leftmost extraction column, a second connecting pipe is fixedly connected to the input end of the first water pump, the end of the second connecting pipe is fixedly connected with the left side of the extraction frame, and the wastewater frame is fixedly connected to the upper surface of the floating body platform and located directly below the extraction column.

[0013] The deposition sampling assembly comprises a mounting plate with a hollow middle part, the upper surface of the mounting plate is fixedly connected with the bottom end of the lifting lead screw and the bottom end of the guide rod through welding, the bottom of the mounting plate is fixedly connected with a second electric telescopic rod at each corner position, the output end of the four second electric telescopic rods is fixedly connected with a connecting plate, and the connecting plate is rotatably connected with a sampling cylinder at the middle position of the bottom of the connecting plate.

[0014] The connecting plate is fixedly connected with four spring telescopic pieces above, the upper surface of the four spring telescopic pieces is fixedly connected with a fixed plate, the upper surface of the fixed plate is fixedly connected with a servo motor, the upper surface of the fixed plate is fixedly connected with a waterproof cover outside the servo motor, the output end of the servo motor is fixedly connected with a transmission rod provided with a limiting strip on two sides through a shaft coupling, the bottom end of the transmission rod penetrates through the top wall of the sampling cylinder and is fixedly connected with a pushing plate, and the pushing plate is slidably connected in the sampling cylinder.

[0015] The detection assembly comprises two limiting sliding sleeves, the two limiting sliding sleeves are fixedly connected to the left and right sides of the bottom surface of the support frame, the two limiting sliding sleeves are slidably connected with a sliding plate inside, the two sliding plates are fixedly connected with a support plate between the two sliding plates, and the support plate is detachably connected with a plurality of transparent detection cups which are the same in number as the extraction columns.

[0016] The detection assembly further comprises two third electric telescopic rods, the two third electric telescopic rods are fixedly connected to the bottom surface of the support frame and located between the two limiting sliding sleeves, the output end of the two third electric telescopic rods is fixedly connected with a connecting strip, the bottom of the connecting strip is fixedly connected with the upper surface of the support plate, and the upper surface of the support plate is fixedly installed with a spectrometer on the rear side of the transparent detection cup.

[0017] The beneficial effects of the present application are:

[0018] 1、The present application realizes synchronous sampling of the two through the floating platform: the floating platform is fixed in the target monitoring water area, the middle through hole is opposite to the "water-sediment interface", so that all sampling assemblies focus on the same monitoring point, when working, three groups of second water pumps of the water body sampling assembly synchronously extract water bodies at different depths of the monitoring point through third connecting pipes with different lengths; at the same time, the deposition sampling assembly is driven by the second electric telescopic rod to insert the sampling cylinder into the sediment of the monitoring point for sampling, the sampling processes of the two are synchronous and the spatial positions are completely consistent, the spatial deviation of traditional independent sampling is avoided, the pesticide data of the water body and the sediment can be directly correlated and analyzed, the pesticide distribution relationship of the "water-sediment" system in the same region is effectively reflected, and the data correlation is improved.

[0019] 2、The third connecting pipe with three groups of different lengths is used for collecting surface water, middle layer water and bottom layer water respectively in the application, so that multi-dimensional data in the vertical direction is covered, and one-sidedness of single depth is avoided; in the aspect of sediment treatment, after the sampling cylinder is cored, the sediment is directly pushed into the extraction frame, and pesticides are extracted in situ by the ultrasonic oscillator, so that the sample does not need to be taken back to the laboratory for segmented treatment, sample loss or pollution is reduced, the sample after extraction is eluted by the extraction column, and the spectrometer of the detection assembly directly analyzes, the whole process is completed in situ, the dynamic migration of pesticides at the "water-sediment interface" can be captured in real time, the interface law is more accurately reflected than the traditional method, the processing efficiency is improved, and reliable data support is provided for research on the pesticide migration mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0021] Figure 1 It is a structural schematic diagram of the present application;

[0022] Figure 2 It is a structural schematic diagram of the water body sampling assembly and the sediment sampling assembly of the present application;

[0023] Figure 3 It is a structural schematic diagram of the support frame bottom of the present application;

[0024] Figure 4 It is a structural schematic diagram of the sediment extraction assembly of the present application;

[0025] Figure 5 It is a structural schematic diagram of the water body sampling assembly of the present application;

[0026] Figure 6 It is a structural schematic diagram of the top surface of the support frame of the present application;

[0027] Figure 7 It is a structural schematic diagram of the sediment sampling assembly of the present application;

[0028] Figure 8 It is a sectional view of the sediment sampling assembly of the present application;

[0029] Figure 9 It is a connection schematic diagram of the servo motor, the transmission rod and the sampling cylinder of the present application;

[0030] Figure 10 It is a structural schematic diagram of the detection assembly of the present application;

[0031] Figure 11 It is Figure 1A local enlarged schematic view at the middle A;

[0032] Figure 12 For Figure 3 A local enlarged schematic view at the middle B.

[0033] Reference numerals in the figure are:

[0034] 1. A floating platform;

[0035] 2. A deposition extraction assembly; 201, a moving guide rail; 202, an extraction frame; 203, an ultrasonic oscillator; 204, a first electric telescopic rod; 205, a waste water frame; 206, a first water pump; 207, a first connecting pipe; 208, a second connecting pipe;

[0036] 3. A support frame;

[0037] 4. A water body sampling assembly; 401, a second water pump; 402, a third connecting pipe; 403, a support; 404, a fourth connecting pipe;

[0038] 5. A mounting seat; 6, an extraction column; 7, a liquid tank; 8, a main liquid inlet pipe; 9, a fifth connecting pipe; 10, a control box; 11, a through-shaft type linear stepping motor; 12, a lifting screw; 13, a guide rod;

[0039] 14. A deposition sampling assembly; 1401, a mounting plate; 1402, a second electric telescopic rod; 1403, a connecting plate; 1404, a sampling cylinder; 1405, a spring telescopic piece; 1406, a fixing plate; 1407, a servo motor; 1408, a waterproof cover; 1409, a transmission rod; 1410, a pushing plate;

[0040] 15. A jacking rod; 16, a microswitch;

[0041] 17. A detection assembly; 1701, a limiting sliding sleeve; 1702, a sliding plate; 1703, a support plate; 1704, a transparent detection cup; 1705, a spectrometer; 1706, a third electric telescopic rod; 1707, a connecting strip. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0043] As shown in the accompanying drawings Figure 1 to the accompanying drawings Figure 12As shown, the present application provides a water-sediment pesticide in-situ synchronous monitoring device, which comprises a floating platform 1 with a through hole in the middle, a sediment sampling assembly 14 is arranged inside the floating platform 1 at the position of the through hole, a support frame 3 is fixedly connected above the floating platform 1, a water sampling assembly 4 is installed on the upper surface of the floating platform 1 on the right side, at least four mounting seats 5 are fixedly connected to the front side of the support frame 3, four extractors 6 are detachably connected inside the front side of the four mounting seats 5, a sediment extraction assembly 2 is installed inside the support frame 3 on the upper side of the floating platform 1, and a detection assembly 17 is installed on the bottom front side of the support frame 3.

[0044] The water sampling assembly 4 comprises at least three groups of second water pumps 401, the input ends of the three groups of second water pumps 401 are fixedly connected with third connecting pipes 402, the lengths of the three third connecting pipes 402 are different, a support 403 is fixedly connected to the right front side of the upper surface of the support frame 3, three groups of fourth connecting pipes 404 are clamped inside the support 403, the lower ends of the three groups of fourth connecting pipes 404 are fixedly connected with the output ends of the three groups of second water pumps 401 through flanges, the ends of the three groups of fourth connecting pipes 404 away from the second water pumps 401 extend into the interiors of three extractors 6 respectively, the sediment sampling assembly 14 can collect sediment samples, the water sampling assembly 4 can sample water, the extractors 6 are used for sample enrichment, the sediment extraction assembly 2 processes sediment samples, and the detection assembly 17 can complete pesticide concentration detection.

[0045] In an embodiment of the present application, the floating platform 1 is fixedly connected with the support frame 3, through shaft type linear stepping motors 11 are fixedly connected to the left and right sides of the bottom of the support frame 3, lifting lead screws 12 are threadedly connected inside the two groups of through shaft type linear stepping motors 11, the bottom ends of the two lifting lead screws 12 are connected with the sediment sampling assembly 14, a guide rod 13 is slidingly connected to the middle of the rear side of the support frame 3, the bottom end of the guide rod 13 is fixedly connected with the sediment sampling assembly 14, the bottom ends of the lifting lead screws 12 threadedly connected inside the through shaft type linear stepping motors 11 are connected with the sediment sampling assembly 14, which can realize automatic discharge of sediment samples in the sampling cylinder 1404, the bottom end of the guide rod 13 is fixedly connected with the sediment sampling assembly 14, which provides guidance for the lifting of the sediment sampling assembly 14, avoids deviation during lifting, and improves the stability and position accuracy of sediment sampling.

[0046] In one embodiment of the present application, the upper surface of the support frame 3 is fixedly connected with a liquid tank 7 for synchronously storing pure water and eluent, (further, the inside of the liquid tank 7 is also provided with two metering pumps for extracting pure water and eluent, the input ends of the two metering pumps are connected with the inlet of the main liquid inlet pipe 8 through electromagnetic valves, and the opening and closing of the two metering pumps are controlled by the control box 10, the control of different fluids here is prior art, and will not be described in detail here) the front side of the liquid tank 7 is fixedly connected with the main liquid inlet pipe 8, the upper side of the main liquid inlet pipe 8 is fixedly connected with the same number of fifth connecting pipes 9 as the extraction columns 6, the ends of the four fifth connecting pipes 9 respectively extend into the four extraction columns 6, the liquid tank 7 synchronously stores pure water and eluent, the inside metering pumps can accurately deliver pure water (activated filler) or eluent (eluted pesticide) to the four extraction columns 6 through the main liquid inlet pipe 8 and the fifth connecting pipes 9 above, realizing automatic control of fluid delivery, reducing manual intervention, ensuring the accuracy of the activation and elution process, and improving the sample processing efficiency.

[0047] In one embodiment of the present application, the bottom surface of the support frame 3 is fixedly connected with a top driving rod 15, the middle of the bottom surface of the top driving rod 15 is fixedly connected with a micro switch 16, the upper surface of the support frame 3 is fixedly connected with a control box 10 on the right side, the micro switch 16 can trigger a signal by contacting the waterproof cover 1408 of the deposition sampling assembly 14, and accurately control the action cooperation of the deposition sampling assembly 14 and the deposition extraction assembly 2; the control box 10 centrally controls the operation of each component, realizes the automatic coordination of each step of the device, ensures the orderly progress of the monitoring process, and improves the intelligent degree of the device.

[0048] As shown in the accompanying drawings Figure 4 As shown in the accompanying drawings In one embodiment of the present application, the deposition extraction assembly 2 includes two moving guide rails 201 and a first electric telescopic rod 204, the two moving guide rails 201 are fixedly connected to the upper surface of the floating body platform 1 on the left and right sides, the upper side of the two moving guide rails 201 is slidably connected with an extraction frame 202 through a sliding block, two ultrasonic oscillators 203 are fixedly installed in the inside of the extraction frame 202, the first electric telescopic rod 204 is fixedly connected to the upper surface of the floating body platform 1 and located on the left side of the extraction frame 202, the output end of the first electric telescopic rod 204 is fixedly connected with the left side of the extraction frame 202 through a connecting piece, acetonitrile extraction liquid is pre-stored in the inside of the extraction frame 202, the moving guide rails 201 provide stable sliding guide for the extraction frame 202, the two ultrasonic oscillators 203 can make the sediment sample and the pre-stored acetonitrile extraction liquid fully mix through high-frequency vibration, improving the pesticide extraction efficiency; the first electric telescopic rod 204 can drive the extraction frame 202 to accurately move along the moving guide rails 201 to the lower side of the sampling cylinder 1404, adapt to the sediment sample transfer demand, and ensure the efficient docking of the extraction process.

[0049] In an embodiment of the present application, the sediment extraction assembly 2 further comprises a first water pump 206 and a waste water frame 205, the first water pump 206 is fixedly connected to the left side above the support frame 3, the output end of the first water pump 206 is fixedly connected with a first connecting pipe 207, the distal end of the first connecting pipe 207 extends to the inside of the leftmost extraction column 6, the input end of the first water pump 206 is fixedly connected with a second connecting pipe 208, the distal end of the second connecting pipe 208 is fixedly connected with the left side of the extraction frame 202, and the waste water frame 205 is fixedly connected to the upper surface of the floating platform 1 and located directly below the extraction column 6. The input end of the sediment extraction assembly 2 is connected with the left side of the extraction frame 202 through the second connecting pipe 208, and the output end extends to the leftmost extraction column 6 through the first connecting pipe 207. The supernatant after extraction can be pumped into the extraction column 6 to complete the enrichment of sediments and pesticides, and the automatic connection of extraction and enrichment is realized. The waste water frame 205 directly below the extraction column 6 can collect waste liquid generated by activation or elution, avoid pollution of the monitoring water area, and improve the environmental protection of the device.

[0050] As shown in the accompanying drawings Figure 7 to the accompanying Figure 9 In an embodiment of the present application, the sediment sampling assembly 14 comprises a hollow installation plate 1401, the upper surface of the installation plate 1401 is fixedly connected with the bottom end of the lifting lead screw 12 and the bottom end of the guide rod 13 through welding, the bottom of the installation plate 1401 is fixedly connected with a second electric telescopic rod 1402 at each of the four corners, the output end of the four second electric telescopic rods 1402 is fixedly connected with a connecting plate 1403, the bottom middle position of the connecting plate 1403 is rotatably connected with a sampling cylinder 1404, the upper surface of the hollow installation plate 1401 is fixedly connected with the bottom end of the lifting lead screw 12 and the guide rod 13 through welding, so as to ensure the stability of the structure; the connecting plate 1403 connected with the output end of the second electric telescopic rod 1402 can push the bottom middle rotatably connected sampling cylinder 1404 to insert into the sediment, so as to realize the depth sampling of the sediment, and the telescopic adjustment of the second electric telescopic rod 1402 can adapt to different sediment depths, so as to improve the flexibility and reliability of sampling.

[0051] In one embodiment of the application, the connecting plate 1403 is fixedly connected with four spring telescopic pieces 1405, the upper end of the four spring telescopic pieces 1405 is fixedly connected with a fixed plate 1406, the upper end of the fixed plate 1406 is fixedly connected with a servo motor 1407, the upper surface of the fixed plate 1406 is fixedly connected with a waterproof cover 1408 outside the servo motor 1407, the output end of the servo motor 1407 is fixedly connected with a transmission rod 1409 provided with a limiting strip on both sides through a shaft coupling, the bottom end of the transmission rod 1409 penetrates through the top wall of the sampling cylinder 1404 and is fixedly connected with a push plate 1410, the push plate 1410 is slidingly connected in the sampling cylinder 1404, and the servo motor 1407 above the fixed plate 1406 can drive the sampling cylinder 1404 to rotate through the transmission rod 1409 provided with a limiting strip, so that the sampling cylinder 1404 is conveniently inserted into hard sediments; the waterproof cover 1408 outside the servo motor 1407 can prevent water from invading the motor, so that the safety of the equipment is ensured; the push plate 1410 connected with the bottom end of the transmission rod 1409 is slidingly connected in the sampling cylinder 1404, and the compression force of the spring telescopic piece 1405 can push the sediments out of the sampling cylinder 1404, so that the rapid transfer of samples is realized, and the continuity of sampling and sample processing is improved.

[0052] As shown in the accompanying drawings, Figure 10 In one embodiment of the application, the detection assembly 17 includes two limiting sleeves 1701, the two limiting sleeves 1701 are fixedly connected to the left and right sides of the bottom surface of the support frame 3, the two limiting sleeves 1701 are slidingly connected with sliding plates 1702, the two sliding plates 1702 are fixedly connected with a support plate 1703, the support plate 1703 is detachably connected with transparent detection cups 1704 which are the same in number as the extraction columns 6, the sliding plates 1702 slidingly connected in the limiting sleeves 1701, the support plate 1703 fixedly connected between the two sliding plates 1702, and the transparent detection cups 1704 detachably connected above the support plate 1703 can accurately receive the to-be-tested liquid flowing out of the extraction columns 6; the cooperation of the limiting sleeve 1701 and the sliding plate 1702 ensures the stable movement of the support plate 1703, improves the accuracy of the detection cup in docking the outlet of the extraction column 6, and provides a stable sample container for subsequent detection.

[0053] In one embodiment of the present application, the detection assembly 17 further comprises two third electric telescopic rods 1706, which are fixedly connected to the bottom surface of the support frame 3 and located between the two groups of limiting sleeves 1701, and the output ends of the two third electric telescopic rods 1706 are fixedly connected with connecting strips 1707, the bottom of the connecting strip 1707 is fixedly connected with the upper surface of the supporting plate 1703, and the spectrometer 1705 is fixedly installed on the upper surface of the middle part of the supporting plate 1703 at the rear side of the transparent detection cup 1704. The third electric telescopic rod 1706 can drive the supporting plate 1703 to move accurately along the limiting sleeve 1701, so that the transparent detection cup 1704 is accurately aligned with the outlet of the extraction column 6; the spectrometer 1705 on the upper surface of the middle part of the supporting plate 1703 can emit specific wavelength light through the detection cup, and the pesticide concentration can be calculated according to the absorbance, so as to realize detection automation, improve the efficiency and accuracy of concentration determination.

[0054] In this embodiment, the working principle and working process of the device are as follows:

[0055] S1: The floating platform 1 is put into the target monitoring water area, the position is fixed by the external anchor chain, the platform is ensured to float stably, the central through hole is opposite to the "water-sediment interface" area to be monitored, the control box 10 is started, and the states of various components are checked: whether the through shaft type linear stepper motor 11, the first electric telescopic rod 204, the second electric telescopic rod 1402 and the third electric telescopic rod 1706 move smoothly; whether the second water pump 401 and the first water pump 206 can normally pump water; the spectrometer 1705 is calibrated to the working state, and at the same time, the water pump in the liquid tank 7 responsible for pumping clean water pumps the clean water into the extraction column 6 to activate the filler, and the waste liquid falls into the wastewater frame 205 below;

[0056] S2: Start the water sampling assembly 4, three groups of second water pumps 401 work at the same time, three third connecting pipes 402 with different lengths are used to pump water bodies at different depths, the short pipe is used to pump the surface layer, the medium-length pipe is used to pump the middle layer, and the longest pipe is used to pump the bottom layer, the pumped water samples flow into three extraction columns 6 filled with C18 solid-phase extraction filler through the fourth connecting pipe 404, preliminary enrichment is completed, and subsequent elution is waited, the second electric telescopic rod 1402 is elongated, the connecting plate 1403 and the sampling cylinder 1404 are pushed into the sediment, and at the same time, the output end of the servo motor 1407 drives the transmission rod 1409 to rotate, synchronously driving the sampling cylinder 1404 to rotate to sample the sediment;

[0057] S3: After sampling is completed, the second electric telescopic rod 1402 is retracted to drive the sampling cylinder 1404 after sampling to return to the original position, the control box 10 drives the through-shaft type linear stepping motor 11 to drive the lifting lead screw 12 to rise, the mounting plate 1401 vertically rises along the guide rod 13, and the sampling cylinder 1404 gradually separates from the water body. When the top of the waterproof cover 1408 contacts the micro switch 16, the lowest point of the sampling cylinder 1404 is higher than the highest point of the extraction frame 202. Since the waterproof cover 1408 extrudes the micro switch 16, the first electric telescopic rod 204 is elongated to push the extraction frame 202 into the sampling cylinder 1404 below along the moving rail 201. With the through-shaft type linear stepping motor 11 continuing to work to drive the mounting plate 1401 to rise, the top-up rod 15 limits the position of the waterproof cover 1408, so that the spring telescopic part 1405 is compressed and the transmission rod 1409 is extruded downward to push the plate 1410, so as to push the sediments in the sampling cylinder 1404 into the extraction frame 202;

[0058] S4: The two ultrasonic oscillators 203 are started to mix the sediment sample in the extraction frame 202 with the extractant through high-frequency vibration to extract the pesticide therein. The first water pump 206 works to pump the supernatant in the extraction frame 202 into the leftmost extraction column 6 through the second connecting pipe 208 and the first connecting pipe 207, and completes the enrichment of the sediments pesticide.

[0059] S5: Then the third electric telescopic rod 1706 is elongated to drive the support plate 1703 to slide forward along the limiting sleeve 1701 through the connecting strip 1707, so that the four transparent detection cups 1704 are respectively aligned with the outlets of the four extraction columns 6. The metering pump responsible for extracting the eluent in the liquid tank 7 is started to inject the eluent into the four extraction columns 6 through the main liquid inlet pipe 8 and the fifth connecting pipe 9, three water body sampling columns + one sediment sampling column, to elute the adsorbed pesticide. The eluted test liquid flows into the corresponding transparent detection cup 1704. The spectrometer 1705 emits light of a specific wavelength through the detection cup. According to the change of absorbance, the concentration of the pesticide in the test liquid is calculated. The control box 10 automatically records the pesticide concentrations of the water body and the sediment samples at different depths to generate a "water body-sediment" pesticide distribution curve, which directly reflects the migration rule of the pesticide at the interface.

[0060] The above only describes some exemplary embodiments of the present application in a descriptive manner. It is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above figures and description are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A water-sediment pesticide in-situ synchronous monitoring device, characterized in that: The utility model provides a water body sampling device, including the floating platform (1) that the middle part is provided with through -hole, the inside of floating platform (1) is provided with deposition sampling assembly (14) at through -hole position, the upper surface right side of floating platform (1) is installed with water body sampling assembly (4), the upper side fixed connection of floating platform (1) is connected with support frame (3), the front side fixed connection of support frame (3) is connected with at least four mounting seat (5), four the front side inside of mounting seat (5) can detachably connected with extraction column (6), the upper side of floating platform (1) is installed with deposition extraction assembly (2) in support frame (3) inboard, the bottom front side of support frame (3) is installed with detection assembly (17), Wherein, the water body sampling assembly (4) includes at least three groups of second water pump (401), the input of three groups of second water pump (401) is fixedly connected with third connecting pipe (402), the length of three third connecting pipes (402) is set to be different from each other, the right front side of the upper surface of support frame (3) is fixedly connected with support (403), the inside of support (403) is clamped with three groups of fourth connecting pipe (404), the lower end of three groups of fourth connecting pipe (404) is fixedly connected with the output of three groups of second water pump (401) through flange respectively, the end away from second water pump (401) of three groups of fourth connecting pipe (404) respectively extends to the inside of three extraction columns (6).

2. The device for in-situ synchronous monitoring of water-sediment pesticides according to claim 1, characterized in that: The upper side of floating platform (1) is fixedly connected with support frame (3), the bottom left and right sides of support frame (3) are fixedly connected with through shaft type linear stepping motor (11), the inside of two groups of through shaft type linear stepping motor (11) is threadedly connected with lifting lead screw (12), the bottom end of two lifting lead screws (12) is connected with deposition sampling assembly (14), the middle part of rear side of support frame (3) is slidably connected with guide rod (13), the bottom end of guide rod (13) is fixedly connected with deposition sampling assembly (14).

3. The device for in-situ synchronous monitoring of water-sediment pesticides according to claim 1, characterized in that: The upper surface middle part of support frame (3) is fixedly connected with liquid tank (7) that synchronously stores water and eluent, the front side of liquid tank (7) is fixedly connected with main liquid inlet pipe (8), the upper side of main liquid inlet pipe (8) is fixedly connected with fifth connecting pipe (9) same as the number of extraction column (6), the end of four fifth connecting pipes (9) is respectively along to four extraction columns (6) inside.

4. The device for in-situ synchronous monitoring of water-sediment pesticides according to claim 1, characterized in that: The middle part of bottom surface of support frame (3) is fixedly connected with jacking rod (15), the middle part of bottom surface of jacking rod (15) is fixedly connected with microswitch (16), the right side of upper surface of support frame (3) is fixedly connected with control box (10).

5. The device for in-situ synchronous monitoring of water-sediment pesticides according to any one of claims 1-4, characterized in that: The deposition extraction assembly (2) comprises two moving guide rails (201) and a first electric telescopic rod (204), the two moving guide rails (201) are fixedly connected to the left and right sides of the upper surface of the floating body platform (1), two ultrasonic oscillators (203) are fixedly installed inside the extraction frame (202) which is slidably connected to the moving guide rails (201) through a sliding block, the first electric telescopic rod (204) is fixedly connected to the upper surface of the floating body platform (1) and located at the left side of the extraction frame (202), and the output end of the first electric telescopic rod (204) is fixedly connected with the left side of the extraction frame (202) through a connecting piece.

6. The device for in-situ synchronous monitoring of water-sediment pesticides according to claim 5, characterized in that: The deposition extraction assembly (2) further comprises a first water pump (206) and a wastewater frame (205), the first water pump (206) is fixedly connected to the left side of the upper surface of the support frame (3), a first connecting pipe (207) is fixedly connected to the output end of the first water pump (206), the first connecting pipe (207) extends to the inside of the leftmost extraction column (6), a second connecting pipe (208) is fixedly connected to the input end of the first water pump (206), the end of the second connecting pipe (208) is fixedly connected with the left side of the extraction frame (202), and the wastewater frame (205) is fixedly connected to the upper surface of the floating body platform (1) and located directly below the extraction column (6).

7. The device for in-situ synchronous monitoring of water-sediment pesticides according to any one of claims 1-4, characterized in that: The deposition sampling assembly (14) comprises a hollow mounting plate (1401), the bottom end of the lifting lead screw (12) and the bottom end of the guide rod (13) are fixedly connected to the upper surface of the mounting plate (1401) by welding, second electric telescopic rods (1402) are fixedly connected to the four corner positions of the bottom of the mounting plate (1401), and connecting plates (1403) are fixedly connected to the output ends of the four second electric telescopic rods (1402).

8. The device for in-situ synchronous monitoring of water-sediment pesticides according to claim 7, characterized in that: Four spring telescopic pieces (1405) are fixedly connected above the connecting plates (1403), fixed plates (1406) are fixedly connected above the four spring telescopic pieces (1405), a servo motor (1407) is fixedly connected above the fixed plates (1406), a waterproof cover (1408) is fixedly connected to the outer side of the servo motor (1407) on the upper surface of the fixed plate (1406), two transmission rods (1409) provided with limiting strips are fixedly connected to the output end of the servo motor (1407) through a shaft coupling, the bottom end of the transmission rod (1409) penetrates through the top wall of the sampling cylinder (1404) and is fixedly connected with a pushing plate (1410), and the pushing plate (1410) is slidably connected inside the sampling cylinder (1404).

9. The device for in-situ synchronous monitoring of water-sediment pesticides according to any one of claims 1-4, characterized in that: The detection assembly (17) comprises two limiting sliding sleeves (1701), both of which are fixedly connected to the left and right sides of the bottom surface of the support frame (3), both of which are slidingly connected with sliding plates (1702) inside, and the two groups of sliding plates (1702) are fixedly connected with a support plate (1703), and the same number of transparent detection cups (1704) as the extraction column (6) are detachably connected above the support plate (1703).

10. The device for in-situ synchronous monitoring of water-sediment pesticides according to claim 9, characterized in that: The detection assembly (17) further comprises two third electric telescopic rods (1706), both of which are fixedly connected to the bottom surface of the support frame (3) and located between the two groups of limiting sliding sleeves (1701), and the output ends of both of the third electric telescopic rods (1706) are fixedly connected with a connecting strip (1707), and the bottom of the connecting strip (1707) is fixedly connected with the upper surface of the support plate (1703), and a spectrometer (1705) is fixedly installed on the upper surface of the support plate (1703) behind the transparent detection cup (1704).

Images