An intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water

Abstract

The present invention relates to the technical field of environmental monitoring, and in particular to an intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water. By arranging a sediment interstitial water monitoring device, a power device and a control system for controlling the power device, and the sediment interstitial water monitoring device to execute preset actions, intelligent monitoring and control can be achieved. The sediment interstitial water monitoring device is provided with a connected external seepage water storage device, a circular turntable device located in the middle, a central water guide pipe unit located in the center and a total water storage unit located at the bottom for receiving interstitial water, and the external seepage water storage device is provided with multiple levels of external storage units from top to bottom, each level of the external storage unit is divided into a plurality of external storage chambers, and each external storage chamber and the corresponding circular turntable unit are provided with sensors. Not only can the in-situ interstitial water heavy metal pollution status be accurately monitored in real time, but also hierarchical monitoring can be performed, thereby greatly improving the early warning efficiency. The accuracy of the monitoring data is ensured by arranging a purified water system.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental monitoring, and in particular to an intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water. Background Art

[0002] Interstitial water (ISW) refers to the water found between sediment particles in a water body, also known as free water. It contains various chemical substances, such as nutrients, toxic heavy metals, and soluble organic matter. The concentrations of these substances are closely related to pollutants in the sediment and enter the overlying water body primarily through diffusion, thereby affecting the water quality. When studying IW, sediment samples are first collected. Subsamples are then filtered through sample cataloging. The interstitial water is then separated by centrifugation and filtration, allowing the collection of IW from the sediment. Finally, the collected IW is batch tested to obtain content data. However, this collection method is not in situ, and subjective factors are present in the subsample cataloging. During the stratification and separation process, IW inevitably mixes between layers, causing the actual collected IW sample to shift from the ideal spatial position, failing to reflect the true state of the IW. Therefore, there is an urgent need for an intelligent monitoring device that can accurately monitor the heavy metal contamination of IW in situ and provide high early warning efficiency. Summary of the Invention

[0003] The invention discloses an intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water, aiming to solve the technical problems existing in the prior art.

[0004] The present invention adopts the following technical solutions:

[0005] An intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water comprises a fixed frame unit, a sediment interstitial water monitoring device installed in the fixed frame unit and provided with a conical drill bit at the bottom, a power device installed on a flat plate of the fixed frame unit, a water purification system, and a control system for controlling the water purification system and the sediment interstitial water monitoring device to perform preset actions; wherein,

[0006] The sediment interstitial water monitoring device includes a controllably connected external seepage water storage device located on the outside, a circular turntable device located in the middle, a vertical central water pipe unit located in the center, and a total water storage unit located at the bottom for receiving interstitial water; and the total water storage unit is connected to the purified water system.

[0007] In some embodiments, the fixing frame unit includes a flat plate and a plurality of bottom mud fixing frames fixed to the bottom of the flat plate for inserting bottom mud. The flat plate is also provided with a level meter for measuring the level of the flat plate.

[0008] In some embodiments, the outer wall of the external seepage water storage device is the same as the bottom circle diameter of the conical drill bit and is fixedly connected as one; the external seepage water storage device is provided with multiple levels of external storage units from top to bottom according to a preset height, and the top of the uppermost external storage unit is provided with a top plate fixedly connected to the output shaft of the power device; the circular turntable device is provided with multiple levels of circular turntable units from top to bottom, and a horizontal circular turntable unit is provided at the bottom of each level of the external storage unit.

[0009] In some embodiments, each level of the external storage unit is divided into several external storage chambers according to preset direction requirements, and each of the external storage chambers is connected to the circular turntable unit of the corresponding level through a horizontal conveying unit; the horizontal conveying unit is provided with an electrically controlled plug, and the circular turntable unit is provided with a corresponding one-way valve, so that the plug corresponding to the preset external storage chamber can be extended / retracted under the control of the control system, and the one-way valve can be opened / closed to control the connection / disconnection between the external storage chamber and the inner cavity of the circular turntable unit.

[0010] In some embodiments, the horizontal conveying unit includes a tube body formed by a straight tube and an elastic foldable hose, and a magnetic baffle, a spring, and a plug placed in the tube body and connected in sequence. The straight tube end is fixedly connected to the outer storage chamber, the elastic foldable hose end is fixedly connected to the circular turntable unit, and the conical tip of the plug faces the circular turntable unit. The magnetic baffle is connected to a control system via a wire, so that when the control system is powered on, the spring pops out and drives the plug to push open the one-way valve. When the power is off, the spring retracts and drives the plug back to its original position, closing the one-way valve.

[0011] A heavy metal sensor connected to the control system is also provided in the straight pipe end.

[0012] In some embodiments, the central water pipe unit extends downward from the top of the top plate to the total water storage unit, and includes an inner tube, an outer tube and a middle water pipe cavity. The inner tube is fastened to the output shaft, and an upper sealing plug is also provided at the top of the water pipe cavity. The upper sealing plug is provided with holes that match the water supply pipe and the return pipe respectively.

[0013] In some embodiments, a plurality of turntable return pipes are provided between all the circular turntable units and the central water pipe unit to connect the two, and a solenoid valve for controlling the passage of gap water is provided at the connection between the circular turntable unit and the turntable return pipe. A heavy metal sensor is also provided in the inner cavity of the circular turntable unit, and the heavy metal sensor and the solenoid valve are both controlled and connected by the control system.

[0014] In some embodiments, a stirrer and a heavy metal sensor are provided in the water storage chamber of the total water storage unit, and the stirrer and the heavy metal sensor are both connected to the control system.

[0015] In some embodiments, the water purification system includes a wastewater recovery device, a filtering device and a water purifier connected in sequence from top to bottom. A water supply pipe is connected to the bottom of the water purifier, and a return pipe is connected to the bottom of the wastewater recovery device. The water supply pipe and the return pipe are inserted into the total water storage unit through the upper sealing plug and the water guide pipe cavity.

[0016] In some embodiments, the control system includes a controller and a control center wirelessly connected to the controller, the controller includes a memory, a processor, and a computer program stored in the memory and executable on the processor to control the sediment interstitial water monitoring device, the power device, and the water purification system to execute instructions. Beneficial effects

[0017] The present invention discloses an intelligent in-situ monitoring device for heavy metal pollution in bottom sediment interstitial water. It can realize intelligent monitoring and control by setting a fixed frame unit, a bottom sediment interstitial water monitoring device installed in the fixed frame unit and fixedly connected as one, a conical drill bit at the bottom, a power device installed on a flat plate of the fixed frame unit, and a control system for controlling the power device and the bottom sediment interstitial water monitoring device to perform preset actions; the bottom sediment interstitial water monitoring device is provided with a connected external seepage water storage device, a circular turntable device located in the middle, a central water conduit unit located in the center and a total water storage unit located at the bottom for receiving interstitial water; and the external seepage water storage device is provided with multiple levels of external storage units from top to bottom according to a preset height, and the circular turntable device is provided with corresponding external storage units from top to bottom. There are multiple levels of circular turntable units, and the external storage unit at each level is divided into several external storage chambers according to preset direction requirements. Each of the external storage chambers is connected to the circular turntable unit of the corresponding level through a horizontal conveying unit. An electrically controlled plug is provided in the horizontal conveying unit, so that the preset plug can be extended / retracted under the control of the control system to control the connection / disconnection between the external storage chamber and the inner cavity of the circular turntable unit. Heavy metal sensors are provided in the circular turntable unit and the horizontal conveying unit, which can not only accurately monitor the heavy metal pollution status of the interstitial water in situ in real time under the control of the control system, but also can be monitored in stages, thereby greatly improving the early warning efficiency; by setting up a purified water system, not only the wastewater can be treated and reused, but also the water storage chamber can be cleaned to ensure the accuracy of the monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0019] Figure 1A schematic diagram of the technical solution structure provided by an embodiment of the present invention;

[0020] Figure 2 for Figure 1 AA cross-sectional view;

[0021] Figure 3 for Figure 1 Magnified view of M;

[0022] Figure 4 for Figure 1 N magnified image;

[0023] Figure 5 for Figure 1 B enlarged view;

[0024] Figure 6 A schematic diagram of the technical solution structure of the upper sealing plug provided by an embodiment of the present invention;

[0025] Figure 7 yes Figure 4 TT cross-sectional view;

[0026] Figure 8 It is a schematic diagram of the technical solution structure of the plug.

[0027] In the picture:

[0028] Fixed frame unit 1; flat plate 11; central through hole 111; bottom mud fixed frame 12; level 13; bottom mud interstitial water monitoring device 2; conical drill bit 21; external seepage water storage device 22; first-stage external storage unit 221; filter membrane 2211; first-stage external storage chamber 2212; first-stage external storage chamber 1 2212-1; first-stage external storage chamber 2 2212-2; first-stage external storage chamber 3 2212-3; first-stage external storage chamber 4 2212-4; first-stage external storage chamber 5 2 212-5; first-stage external storage chamber six 2212-6; inner wall 2213; inner wall through hole 22131; top plate 2214; center through hole 2215; sealing rubber plate 2216; transverse partition wall 2217; push frame 2218; second-stage external storage unit 222; second-stage external storage chamber 2221; third-stage external storage unit 223; third-stage external storage chamber 2231; circular turntable device 23; first-stage circular turntable unit 231; first-stage circular turntable inner chamber 2311; second-stage Circular turntable unit 232; second-stage circular turntable inner chamber 2321; third-stage circular turntable unit 233; third-stage circular turntable inner chamber 2331; horizontal conveying unit 24; straight pipe 241; elastic folding hose 242; magnetic baffle 243; spring 244; plug 245; platform 2451; central water pipe unit 25; water pipe cavity 251; inner pipe 252; outer pipe 253; upper sealing plug 254; central hole 2541; water supply pipe hole 2542; return water Pipe hole 2543; main water storage unit 26; water storage chamber 261; agitator 262; turntable return pipe 27; one-way valve 28; solenoid valve 29; power unit 3; servo motor 31; transmission shaft 311; rotating shaft 312; water purification system 4; wastewater recovery device 41; filter device 42; water purifier 43; water supply pipe 44; return pipe 45; water pump 46; control system 5; controller 51; control center 52; heavy metal sensor 6; interstitial water 7; solar energy 8; wire 9. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings; in the description of the present invention, it should be noted that the "including" mentioned in the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "several" means no less than 3.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0031] Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0032] like Figures 1-8 As shown, the technical solution disclosed in the present invention is:

[0033] An intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water comprises a fixed frame unit 1, a sediment interstitial water monitoring device 2 installed in the fixed frame unit 1 and provided with a conical drill bit 21 at the bottom, a power device 3 installed on a flat plate 11 of the fixed frame unit 1, a water purification system 4, and a control system 5 for controlling the water purification system 4 and the sediment interstitial water monitoring device 2 to perform preset actions; wherein,

[0034] The sediment interstitial water monitoring device 2 includes a controllably connected external seepage water storage device 22, a circular turntable device 23 in the middle, a vertical central water pipe unit 25 in the center, and a total water storage unit 26 at the bottom for receiving interstitial water 7; and the total water storage unit 26 is connected to the purified water system 4.

[0035] like Figures 1-8 As shown, the preferred embodiment of the present invention:

[0036] An intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water comprises a fixed frame unit 1, a sediment interstitial water monitoring device 2 installed in the fixed frame unit 1 and provided with a conical drill bit 21 at the bottom, a power device 3 installed on a flat plate 11 of the fixed frame unit 1, a water purification system 4, and a control system 5 for controlling the power device 3 and the sediment interstitial water monitoring device 2 to perform preset actions; wherein,

[0037] The sediment interstitial water monitoring device 2 includes a controllably connected external seepage water storage device 22, a circular turntable device 23 in the middle, a vertical central water pipe unit 25 in the center, and a total water storage unit 26 at the bottom for receiving interstitial water 7; and the total water storage unit 26 is connected to the purified water system 4.

[0038] The fixing frame unit 1 includes a flat plate 11 and a plurality of bottom mud fixing frames 12 fixed to the bottom of the flat plate 11 for inserting into the bottom mud. In this embodiment, four bottom mud fixing frames 12 are used, and the bottom of the bottom mud fixing frames 12 is conical, which is convenient for inserting into the bottom mud. The flat plate 11 is also provided with a level 13 for measuring the level of the flat plate 11 and a solar energy 8 for providing electricity.

[0039] The outer wall of the seepage water storage device 22 has the same diameter as the bottom circle of the conical drill bit 21 and is fixedly connected to form a whole with a cylindrical upper end and a conical lower end.

[0040] The external seepage water storage device 22 is provided with multiple levels of external storage units from top to bottom according to a preset height, namely the first-level external storage unit 221, the second-level external storage unit 222, the third-level external storage unit 223,..., and the circular turntable device 23 is correspondingly provided with multiple levels of circular turntable units from top to bottom, and a horizontal circular turntable unit is correspondingly provided at the bottom of each level of the external storage unit.

[0041] This embodiment selects three-level external storage units, such as Figure 1 shown.

[0042] A top plate 2214 is provided on the top of the first-level external storage unit 221, and a central through hole 2215 is provided in the center of the top plate 2214. The transmission shaft 311 of the power device 3 matches the central through hole 2215. A sealing rubber plate 2216 is provided at the bottom of the top plate 2214 for sealing the top to ensure that the collected samples are from the external storage units at all levels; the upper end of the top plate 2214 is fixedly connected to the push frame 2218.

[0043] Each level of the external storage unit includes a filter membrane, an inner wall, a transverse partition wall, and an external storage chamber enclosed by the filter membrane, the inner wall, and the transverse partition wall. Each level of the external storage chamber is divided into a number of external storage chambers according to the preset direction requirements. In this embodiment, the external storage units at each level are divided into 6 to monitor the heavy metal pollution in 6 directions. Taking the first level external storage unit 221 as an example, see Figure 1 、 Figure 2 :

[0044] The first-stage external storage unit 221 is enclosed by a filter membrane 2211, an inner wall 2213, a transverse partition wall 2217 and a top plate 2214 to form a first-stage external storage chamber 2212. The first-stage external storage chamber 2212 can store the seepage water filtered by the filter membrane 2211. However, since the first-stage external storage chamber 2212 collects interstitial water in a 360° direction, if there is pollution, the location of the pollution source cannot be accurately located, which is convenient for the next step of treatment and repair. Therefore, the first-stage external storage chamber 2212 is 2212 is divided into the first outer storage chamber 2212-1, the second first outer storage chamber 2212-2, the third first outer storage chamber 2212-3, the fourth first outer storage chamber 2212-4, the fifth first outer storage chamber 2212-5, and the sixth first outer storage chamber 2212-6, all of which are independent spaces; each outer storage chamber collects interstitial water within a central angle of 60°, and each outer storage chamber separately monitors the pollution status of the interstitial water 7, so the location of the pollution source can be accurately determined.

[0045] Similarly, the second-level external storage chamber 2221 provided in the second-level external storage unit 222 and the third-level external storage chamber 2231 provided in the third-level external storage unit 223 are divided into 6 independent spaces in the same equal division method as the first-level external storage chamber 2212, and the interstitial water 7 in each independent space is monitored separately.

[0046] In this embodiment, a total of 18 spatial regions are monitored in real time.

[0047] The first-stage outer storage chamber 2212 , the second-stage outer storage chamber 2221 , and the third-stage outer storage chamber 2231 are all divided by a transverse partition wall 2217 , and their corresponding heights H1 , H2 , and H3 are determined according to preset detection requirements.

[0048] The filter membrane 2211 uses a double-sided PVDF filter membrane with a thickness of 0.1 mm. The small permeation holes outside the cavity use an ultra-thin filter membrane with a pore size of 5 μm and a thickness of 10 μm.

[0049] In this embodiment, the circular turntable device 23 is provided with three levels of circular turntable units from top to bottom, namely a first-level circular turntable unit 231 , a second-level circular turntable unit 232 , and a third-level circular turntable unit 233 .

[0050] Each of the external storage chambers is connected to the circular turntable unit of the corresponding level through a horizontal conveying unit; such as the first-level external storage chamber 2212: the first-level external storage chamber one 2212-1, the first-level external storage chamber two 2212-2, the first-level external storage chamber three 2212-3, the first-level external storage chamber four 2212-4, the first-level external storage chamber five 2212-5, and the first-level external storage chamber six 2212-6 are respectively connected to the first-level circular turntable unit 231 through a horizontal conveying unit 24, that is, the first-level external storage chamber 2212 connects each external storage chamber with the first-level circular turntable inner cavity 2311 provided in the first-level circular turntable unit 231 through 6 horizontal conveying units 24; the horizontal conveying unit 24 matches and fits with the inner wall through hole 22131 provided on the inner wall 2213.

[0051] Similarly, each external storage chamber of the second-level external storage unit 222 is connected to the second-level circular turntable unit 232 through the horizontal conveying unit 24, that is, the second-level external storage chamber 2221 is connected to the second-level circular turntable inner chamber 2321 provided in the second-level circular turntable unit 232 through 6 horizontal conveying units 24.

[0052] Each outer storage chamber of the third-level outer storage unit 223 is connected to the third-level circular turntable unit 233 through the horizontal conveying unit 24, that is, the third-level outer storage chamber 2231 is connected to the third-level circular turntable inner chamber 2331 provided in the third-level circular turntable unit 233 through 6 horizontal conveying units 24. Figure 1 shown.

[0053] The horizontal conveying unit 24 includes a tube body formed by a straight tube 241 and an elastic folded hose 242, and a magnetic baffle 243, a spring 244 and a plug 245 placed in the tube body and connected in sequence. One end of the straight tube 241 is fixedly connected to the external storage chamber, one end of the elastic folded hose 242 is fixedly connected to the circular turntable device 23, and the conical tip of the plug 245 faces the circular turntable device 23.

[0054] For example, one of the first-stage outer storage chambers 2212-1 is connected to the first-stage circular turntable unit 231 through the horizontal conveying unit 24, the magnetic baffle 243 is fixed in the middle of the straight pipe 241, and the side is used for the passage of the gap water 7. The magnetic baffle 243 is connected to the control system 5 through the wire 9. The plug 245 is conical in shape, with a platform 2451 at the bottom. The edge of the platform 2451 is inserted into the elastic folding hose 242, and the plug 245 is in a horizontal state, so that when the control system 5 is powered on, the spring 244 pops out and drives the plug 245 to push the one-way valve 2 correspondingly installed on the inner wall of the first-stage circular turntable unit 231. 8. The interstitial water 7 in one of the first-stage external storage chambers 2212-1 enters the first-stage circular turntable inner chamber 2311 through the inner cavity of the straight pipe 241, the inner cavity of the elastic folded hose 242, and the channel opened by the one-way valve 28, that is, it is in the connected state; when the power is off, the spring 244 retracts and drives the plug 245 to return to its position, the one-way valve 28 is closed, and the horizontal conveying unit 24 is isolated from the first-stage circular turntable inner chamber 2311, that is, it is in the disconnected state; each of the plugs 245 is individually controlled by the control system 5, and a heavy metal sensor 6 connected to the control system 5 through a wire 9 is also installed in the straight pipe 241 of each horizontal conveying unit 24, as shown in FIG. Figure 4 、 Figure 7 、 Figure 8 shown.

[0055] The central water pipe unit 25 includes an inner tube 252, an outer tube 253 and a water pipe cavity 251 in the middle. The inner tube 252 is fitted and fastened to the rotating shaft 312, and the top of the water pipe cavity 251 is also provided with an upper sealing plug 254. The upper sealing plug 254 is sleeved on the outside of the inner tube 252 through a center hole 2541. The upper sealing plug 254 is provided with a water supply pipe hole 2542 and a return pipe hole 2543 for matching the water supply pipe 44 and the return pipe 45. The top of the central water pipe unit 25 is located in the central through hole 2215 of the top plate 2214 and extends downward to the water storage chamber 261 provided in the total water storage unit 26. Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 shown.

[0056] A number of turntable return pipes 27 are provided between all the circular turntable devices 23 and the central water pipe unit 25 to connect the two, and a solenoid valve 29 is provided at the connection between the circular turntable unit and the turntable return pipe 27 to control the flow of gap water 7. A heavy metal sensor 6 is also provided in the inner cavity of the circular turntable unit. The heavy metal sensor 6 and the solenoid valve 29 are both controlled and connected by the control system 5.

[0057] A solenoid valve 29 is also installed on the inner wall of the first-stage circular turntable unit 231 at the connection with the turntable return pipe 27 , and the solenoid valve 29 is connected to the control system 5 .

[0058] The first-stage circular turntable unit 231 is connected to a plurality of evenly distributed turntable return pipes 27. In this embodiment, three turntable return pipes 27 are connected, that is, the central angle of the three turntable return pipes 27 in the horizontal plane is 120°, and the angle θ between the turntable return pipe 27 and the vertical center axis ranges from 30° to 80°. Under the control of the control system 5, the solenoid valve 29 is opened, and the interstitial water 7 in the first-stage circular turntable inner chamber 2311 enters the turntable return pipe 27 and then flows into the water storage chamber 261 through the water guide cavity 251 to complete the collection. Figure 2 、 Figure 4 、 Figure 5 shown.

[0059] The second-stage circular turntable unit 232 and the third-stage circular turntable unit 233 are respectively connected to the three evenly distributed turntable return pipes 27, and are connected to the water storage chamber 261 through the turntable return pipes 27 and the water guide cavity 251. Figure 1 shown.

[0060] The total water storage unit 26 is provided with a water storage chamber 261, an agitator 262 arranged in the water storage chamber 261 and a heavy metal sensor 6. The agitator 262 and the heavy metal sensor 6 are both connected to the control system 5. The agitator 262 can stir the interstitial water 7 in the water storage chamber 261 evenly.

[0061] The water purification system 4 includes a wastewater recovery device 41, a filtering device 42 and a water purifier 43 connected in sequence from top to bottom. A water supply pipe 44 is connected to the bottom of the water purifier 43, and a return pipe 45 is connected to the bottom of the wastewater recovery device 41. The return pipe 45 is connected to a water pump 46; the water supply pipe 44 and the return pipe 45 are inserted into the water storage chamber 261 provided in the total water storage unit 26 through the upper sealing plug 254 and the water guide pipe cavity 251.

[0062] The control system 5 is provided with a controller 51 and a remote control center 52. The controller 51 is mounted on a flat panel 11. The flat panel 11 is also equipped with a solar cell 8 for providing electrical energy to the entire device.

[0063] When the interstitial water 7 in the water storage chamber 261 becomes wastewater after detection, the controller 51 controls the water pump 46 to pump the wastewater back to the wastewater recovery device 41 along the return pipe 45. The wastewater also includes rainwater received by the wastewater recovery device 41, which enters the water purifier 43 after being filtered by the filter device 42. When the water storage chamber 261 needs to be cleaned, the controller 51 controls the water purifier 43 to work and send the clean water into the water storage chamber 261 through the water supply pipe 44 for cleaning. The wastewater is recycled, ensuring the accurate and reliable detection of heavy metals in the interstitial water 7 of the water storage chamber 261.

[0064] The control system 5 includes a controller 51 and a control center 52 wirelessly connected to the controller 51. The control center 52 can remotely control the controllers 51 at several locations. Each controller 51 controls a bottom mud interstitial water monitoring device 2 at one location for monitoring.

[0065] The controller 51 includes a memory, a processor, and a computer program stored in the memory and executable on the processor to control the sediment interstitial water monitoring device 2, the power device 3, and the water purification system 4 to execute instructions.

[0066] The power device 3 includes a servo motor 31, a transmission shaft 311 and a rotating shaft 312; the transmission shaft 311 and the rotating shaft 312 are both connected to the output end of the servo motor 31 through the central through hole 111 provided on the flat plate 11; when the power device 3 needs to send the bottom mud interstitial water monitoring device 2 into the bottom mud at a preset depth in a preset monitoring area, the output end of the servo motor 31 is connected to the transmission shaft 311, and the transmission shaft 311 pushes the pushing frame 2218 downward, so that the bottom mud interstitial water monitoring device 2 enters the preset depth.

[0067] When the rotating shaft 312 is required to drive the circular turntable device 23 to rotate, the output end of the servo motor 31 is connected to the rotating shaft 312 .

[0068] The controller 51 controls the horizontal conveying unit 24 and the circular turntable device 23 to be in a disconnected state. The rotation of the rotating shaft 312 drives the circular turntable device 23 to rotate, thereby completing the uniform mixing of the interstitial water 7 in the inner cavity of the circular turntable device 23 and ensuring the accuracy of the detection data.

[0069] The sediment interstitial water monitoring device 2 can perform three-level monitoring and early warning under the control of the controller 51. The first-level monitoring is for the interstitial water 7 in the bottom water storage chamber 261, that is, obtaining the detection data of the heavy metal sensor 6 therein. If the value does not exceed the risk control preset value, no early warning is issued. If the value exceeds the risk control preset value, an early warning is issued. In this embodiment, the first-level risk control preset value is set to (K*1 / 18). The K value is the pollution risk control value of the five heavy metal elements cadmium (Cd), mercury (Hg), arsenic (As), lead (Pb), and chromium (Cr). The K value of different heavy metal elements in the sediment needs to be selected according to different pH value ranges, as shown in Table 1:

[0070] Table 1

[0071]

[0072] If it exceeds the preset value, an alarm will be issued, proving that pollution occurs around the monitoring device. At this time, the second-level monitoring alarm will be triggered. If it does not exceed the preset value, no alarm is required. When the second-level monitoring alarm is triggered, the controller 51 will respectively obtain the test data of the heavy metal sensor 6 in the three circular disks of the first-level circular turntable unit 231, the second-level circular turntable unit 232, and the third-level circular turntable unit 233. If an alarm is issued in one of the three circular turntable units, it proves that the depth content exceeds the second-level risk control value. In this embodiment, the second-level risk control preset value is set to (K*1 / 6). If it exceeds the preset value, an alarm will be issued. At this time, the third-level monitoring alarm will be triggered. If it does not exceed the preset value, no alarm is required. When the third-level monitoring alarm is triggered, the test data of the heavy metal sensor 6 in the horizontal conveying unit 24 in 3x6 directions will be obtained through the controller 51, so that the pollution source in the specific direction can be tracked.

[0073] The three-level monitoring and early warning can save data storage space to the greatest extent. When the first-level monitoring system does not trigger an early warning, the corresponding second-level and third-level monitoring systems will not be triggered, and there will be no data records. This saves computing data and improves early warning efficiency.

[0074] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. An intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water, characterized by: It includes a fixed frame unit, a bottom mud interstitial water monitoring device installed in the fixed frame unit and provided with a conical drill bit at the bottom, a power device installed on a flat plate of the fixed frame unit, a water purification system, and a control system for controlling the water purification system and the bottom mud interstitial water monitoring device to perform preset actions; wherein, The bottom mud interstitial water monitoring device includes an external seepage water storage device that can be controlled and connected, a circular turntable device located in the middle, a central water pipe unit located in the center and a total water storage unit located at the bottom for receiving interstitial water; The outer wall of the external seepage water storage device has the same diameter as the bottom circle of the conical drill bit and is fixedly connected as one body; the external seepage water storage device is provided with multiple levels of external storage units from top to bottom according to a preset height, and the top of the uppermost external storage unit is provided with a top plate fixedly connected to the output shaft of the power device; the circular turntable device is provided with multiple levels of circular turntable units from top to bottom, and a horizontal circular turntable unit is provided at the bottom of each level of the external storage unit; each level of the external storage unit is divided into a number of external storage chambers according to preset direction requirements, and each of the external storage chambers is connected to the circular turntable unit of the corresponding level through a horizontal conveying unit; The horizontal conveying unit includes a tube body formed by a straight tube and an elastic folded hose, and a magnetic baffle, a spring, and a plug placed in the tube body and connected in sequence. The end of the straight tube is fixedly connected to the external storage chamber, and a heavy metal sensor connected to the control system is also provided in the end of the straight tube. The central water pipe unit extends downward from the top of the top plate to the main water storage unit, and includes an inner pipe, an outer pipe and a water pipe cavity in the middle; A plurality of turntable return pipes are provided between all the circular turntable units and the central water pipe unit to connect the two, and a solenoid valve for controlling the passage of gap water is provided at the connection between the circular turntable unit and the turntable return pipe. A heavy metal sensor is also provided in the inner cavity of the circular turntable unit. The heavy metal sensor and the solenoid valve are both controlled and connected by the control system; A stirrer and a heavy metal sensor are provided in the water storage chamber of the total water storage unit, and the total water storage unit is connected to the water purification system.

2. The intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water according to claim 1 is characterized by: The fixing frame unit includes a flat plate and a plurality of bottom mud fixing frames fixed to the bottom of the flat plate for inserting bottom mud. The flat plate is also provided with a level meter for measuring the level of the flat plate.

3. The intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water according to claim 1 is characterized by: The horizontal conveying unit is provided with an electrically controlled plug, and the circular turntable unit is provided with a corresponding one-way valve, so that the plug corresponding to the preset external storage chamber can be extended / retracted under the control of the control system, and the one-way valve can be opened / closed to control the connection / disconnection between the external storage chamber and the inner cavity of the circular turntable unit.

4. The intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water according to claim 3 is characterized by: The elastic foldable hose end is fixedly connected to the circular turntable unit, and the conical tip of the plug faces the circular turntable unit. The magnetic baffle is connected to the control system through a wire, so that when the control system is powered on, the spring pops out and drives the plug to push open the one-way valve. When the power is off, the spring retracts and drives the plug back to its position, and the one-way valve is closed.

5. The intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water according to claim 1 is characterized by: The inner tube is fitted and fastened on the output shaft, and an upper sealing plug is provided at the top of the water guide tube cavity. The upper sealing plug is provided with holes respectively matching the water supply pipe and the water return pipe.

6. The intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water according to claim 1 is characterized by: The stirrer and the heavy metal sensor are both connected to the control system.

7. The intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water according to claim 5 is characterized by: The water purification system includes a wastewater recovery device, a filtering device and a water purifier connected in sequence from top to bottom. The bottom of the water purifier is connected to a water supply pipe, and the bottom of the wastewater recovery device is connected to a return pipe. The water supply pipe and the return pipe are inserted into the total water storage unit through the upper sealing plug and the water guide pipe cavity.

8. The intelligent in-situ monitoring device for heavy metal pollution in sediment interstitial water according to claim 1 is characterized by: The control system includes a controller and a control center wirelessly connected to the controller. The controller includes a memory, a processor, and a computer program stored in the memory and executable on the processor to control the bottom sediment interstitial water monitoring device, the power device, and the water purification system to execute instructions.

Images