Device and method for quickly identifying underground water pollution of solid waste landfill

Abstract

The invention provides a device and a method for quickly identifying underground water pollution of a solid waste landfill, and belongs to the technical field of underground water treatment. Comprising a fixed supporting module installed at the upper end of a monitoring well, a sampling module connected with the fixed supporting module, a detection installation module connected with the sampling module and a controller. A water body sampled by the sampling module is pumped into the detection mounting box, the pH value, conductivity, heavy metal and VOCs indexes of underground water are detected through the multi-parameter sensing unit, detection data are sent to an external control center in real time, and intelligent data analysis and rapid source tracing of a pollution source are performed through the external control center. The underground water pollution risk can be effectively monitored, and the underground water pollution emergency response efficiency is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of groundwater treatment, and in particular relates to a device and method for quickly identifying groundwater pollution in a solid waste landfill. Background Art

[0002] With the rapid development of urbanization and industrialization, the amount of solid waste generated has increased year by year. As one of the main disposal methods, the potential environmental risks of solid waste landfills have become increasingly prominent. Among them, groundwater pollution is one of the most serious environmental problems of solid waste landfills. Due to the aging, damage or design defects of the landfill anti-seepage system, pollutants in the leachate (such as heavy metals, organic pollutants, ammonia nitrogen, etc.) may migrate to the groundwater system, causing the surrounding groundwater quality to deteriorate, threatening the ecological environment and human health.

[0003] Currently, monitoring of groundwater pollution at solid waste landfills mainly relies on traditional sampling and laboratory analysis methods, that is, collecting water samples in monitoring wells and sending them to the laboratory for testing. However, this method has poor timeliness, and frequent sampling and laboratory testing consumes a lot of manpower, material and financial resources. The diameters, depths and geological conditions of different monitoring wells vary greatly. Existing sampling devices are difficult to adapt to monitoring wells of different specifications, resulting in poor sampling stability and affecting detection accuracy.

[0004] Therefore, there is an urgent need for a device and method that can quickly, stably and accurately identify groundwater pollution in solid waste landfills to improve monitoring efficiency and data reliability and provide a scientific basis for pollution prevention, control and governance. Summary of the Invention

[0005] In response to the above-mentioned problems, the present invention provides a device and method for quickly identifying groundwater pollution in a solid waste landfill.

[0006] The technical solution of the present invention is: a rapid identification device for groundwater pollution in a solid waste landfill, comprising a fixed support module installed at the upper end of a monitoring well, a sampling module connected to the fixed support module, a detection installation module connected to the sampling module, and a controller;

[0007] The sampling module includes a water sample temporary storage cylinder with a sampling tube at the bottom, an upper annular plate and a lower annular plate connected to the upper and lower ends of the water sample temporary storage cylinder respectively, and a filter screen sleeved on the outer wall of the sampling tube;

[0008] A trapezoidal sliding block that can slide up and down along its inner wall is provided at the center of the upper annular plate, and the side walls of the trapezoidal sliding block are evenly provided with a plurality of sliding adjustment grooves along the circumference. A plurality of through-holes are provided on the inner wall of the upper annular plate corresponding to the positions of the sliding adjustment grooves. Each through-hole is slidably connected to a horizontal grab bar, and one end of the horizontal grab bar is slidably connected to the corresponding sliding adjustment groove, and the other end extends to the outside of the through-hole. The lower annular plate has the same structure as the upper annular plate, and the corresponding trapezoidal sliding blocks in the lower annular plate are symmetrically distributed with the trapezoidal sliding blocks in the upper annular plate, and the two trapezoidal sliding blocks are connected by a second hydraulic cylinder;

[0009] The detection installation module includes an installation platform with a power chain at the bottom end, a detection installation box arranged on the installation platform, a multi-parameter sensing unit arranged in the detection installation box, a vertical sliding plate arranged on the installation platform and close to one side of the monitoring well, a horizontal installation plate that can slide up and down along the vertical sliding plate, and a vertical connecting rod for connecting the horizontal installation plate and the upper annular plate. The water sample temporary storage cylinder and the detection installation box are connected by a connecting hose and a liquid pump is provided at the connection.

[0010] Furthermore, an arc-shaped abutment plate is provided at one end of the horizontal grab bar outside the through-hole, which fits the inner wall of the monitoring well. A plurality of protrusions are evenly provided on the side wall of the arc-shaped abutment plate, and an arc-shaped scraper is provided at the bottom end of the arc-shaped abutment plate along its arc length direction.

[0011] Description: When the second hydraulic cylinder drives the two trapezoidal sliding blocks to move closer to or away from each other, each horizontal grab bar moves along the corresponding sliding adjustment groove to the side close to or away from the trapezoidal sliding block. The inclined surface of the trapezoidal sliding block cooperates with the sliding adjustment groove to convert the linear motion of the second hydraulic cylinder into radial expansion and contraction of the horizontal grab bar, so that the arc-shaped abutment plate abuts against the inner wall of monitoring wells of various inner diameters, thereby forming a rigid support for the water sample temporary storage tube, reducing the disturbance of the sampling module caused by groundwater flow or equipment vibration, and ensuring the stability of the detection data of the multi-parameter sensing unit. By setting several protrusions on the arc-shaped abutment plate, the friction between the arc-shaped abutment plate and the well wall can be increased to prevent the device from sliding or offsetting during the sampling process.

[0012] Furthermore, a plurality of sampling branches are provided on the outer wall of the sampling tube, and a filter plate is fastened at the water inlet of each sampling branch, and the mesh number of the filter plate is greater than the mesh number of the filter screen.

[0013] Note: Groundwater is simultaneously pumped into the water sample storage cylinder through each sampling branch pipe, which significantly shortens the sampling time. At the same time, the groundwater is initially filtered through the filter net, and then filtered twice through the filter plate at the water inlet of each sampling branch pipe, which can effectively remove suspended particles in the groundwater and ensure that the test data truly reflects the concentration of dissolved pollutants.

[0014] Furthermore, the fixed support module includes an annular fixed support plate arranged at the periphery of the monitoring well, a sliding guide cylinder arranged at the center of the annular fixed support plate and passing through an auxiliary horizontal support rod, and the vertical connecting rod can slide up and down along the inner wall of the sliding guide cylinder.

[0015] Note: When the fixed support module is in use, the annular fixed support plate is fixed to the periphery of the monitoring well. When the vertical connecting rod moves downward, it will slide along the inner wall of the sliding guide cylinder, providing guidance for the movement of the vertical connecting rod, which can further improve the installation stability of the sampling module.

[0016] Furthermore, a plurality of adjustment sliding grooves are provided in a divergent shape along the upper end of the annular fixed support plate, and a sliding mounting block is slidably connected to each of the adjustment sliding grooves through a horizontally placed second hydraulic cylinder, and the sliding mounting block is provided with an internal threaded opening, and a threaded plug-in column is threadedly connected to the internal threaded opening, and the upper end of the threaded plug-in column is provided with a mounting recess for accommodating an external drive drill bit.

[0017] Description: When installing the annular fixed support plate at the periphery of the monitoring well, the threaded plug-in column can be inserted into the internal threaded opening of each sliding mounting block, and the external drive drill bit can be abutted against the mounting recess. Under the action of the external drive drill bit, it is inserted downward into the soil to complete the fixed installation of the annular fixed support plate. When the position of the fixed point needs to be adjusted, the corresponding sliding mounting block can be driven by the second hydraulic cylinder to slide in the adjustment sliding groove, thereby optimizing the fixing effect of the annular fixed support plate.

[0018] Furthermore, a card block is provided on the vertical sliding plate, a card interface is provided on the side wall of the card block, one end of the horizontal mounting plate is inserted into the card interface and connected to the side wall of the card interface through an electric telescopic rod.

[0019] Note: When it is necessary to adjust the horizontal position of the vertical connecting rod to ensure that the sampling module connected to its bottom end is accurately moved into the monitoring well, at this time, the main body of the equipment is moved to the vicinity of the monitoring well through the power chain, and the horizontal mounting plate is driven by the electric telescopic rod to move toward the monitoring well in the clamping block until the sampling module is located at the upper end of the monitoring well. This can achieve precise adjustment of the horizontal position of the sampling module, thereby improving the accuracy of the sampling position. This method is more efficient and reduces the complexity and time cost of operation.

[0020] Furthermore, the card interface is provided with horizontal sliding grooves at the upper and lower ends, and the upper and lower ends of the horizontal mounting plate are slidably connected to the corresponding horizontal sliding grooves through sliding bars.

[0021] Description: When the electric telescopic rod drives the horizontal mounting plate to move in the clamping block, the sliding bar slides in the horizontal sliding groove to ensure that the horizontal mounting plate moves in the predetermined direction, avoiding the horizontal mounting plate from deflecting or shaking during the movement, thereby improving the stability of the entire structure in the horizontal direction.

[0022] Furthermore, the multi-parameter sensing unit includes a mounting bracket connected to the inner wall of the detection installation box, a pH sensor, a conductivity sensor, a heavy metal electrode array and a VOCs detection probe arranged on the mounting bracket.

[0023] Description: The pH sensor can measure the acidity and alkalinity of groundwater, the conductivity sensor can measure the conductivity of electrolytes in groundwater, the heavy metal electrode array is specifically used to detect heavy metal ions in groundwater, and the VOCs detection probe is responsible for detecting the content of volatile organic compounds in groundwater. The multi-parameter sensing unit can detect multiple parameters at the same time, and can detect different types of indicators such as pH, conductivity, heavy metals and VOCs. It can conduct a comprehensive and integrated assessment of the pollution status of groundwater, which helps to more accurately judge the source, type and severity of groundwater pollution, and provide more comprehensive data support for subsequent pollution control and prevention measures.

[0024] The present invention also discloses a method for quickly identifying groundwater pollution in a solid waste landfill, which is based on the above-mentioned device for quickly identifying groundwater pollution in a solid waste landfill and includes the following steps:

[0025] S1. Move the main body of the equipment to the vicinity of the monitoring well through the power chain, and use the power equipment to drive the horizontal mounting plate downward so that the fixed support module is located on the ground around the monitoring well, and fix the fixed support module. At this time, continue to use the power equipment to drive the horizontal mounting plate downward. When the vertical connecting rod moves downward, it will slide along the inner wall of the sliding guide cylinder to provide guidance for the movement of the vertical connecting rod. When the sampling module moves to the preset depth in the monitoring well, it is ready;

[0026] S2. When the two trapezoidal sliding blocks are driven toward or away from each other by the second hydraulic cylinder, each horizontal grab bar moves along the corresponding sliding adjustment groove toward or away from the trapezoidal sliding block. The inclined surface of the trapezoidal sliding block cooperates with the sliding adjustment groove to convert the linear motion of the second hydraulic cylinder into radial expansion and contraction of the horizontal grab bar, so that the horizontal grab bar abuts against the inner wall of monitoring wells of various inner diameters, thereby forming a rigid support for the water sample temporary storage cylinder;

[0027] S3. Use a liquid pump to pump the groundwater in the monitoring well through the sampling tube into the water sample temporary storage cylinder, and remove solid impurities in the water through a filter. Then, the groundwater is pumped into the detection installation box through a connecting hose. Then, the pH, conductivity, heavy metals and VOCs indicators in the groundwater are detected by a multi-parameter sensing unit, and the test results are sent to the controller. The controller sends the signal to the external control center through wireless communication, and the external control center evaluates the pollution status of the groundwater.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] When the solid waste landfill groundwater pollution rapid identification device of the present invention is in use, the annular fixed support plate is installed at the periphery of the monitoring well, and the sampling module is guided by the sliding guide cylinder at the center of the annular fixed support plate. When the sampling module moves to a preset depth in the monitoring well, the inclined surface of the trapezoidal sliding block cooperates with the sliding adjustment groove to convert the linear motion of the second hydraulic cylinder into radial expansion and contraction of the horizontal grab bar, so that the horizontal grab bar abuts against the inner wall of the monitoring well of various inner diameters, and can be adapted to monitoring wells of different inner diameters (from narrow diameter to wide diameter), ensuring stable fixation in various well types. At the same time, it can also form a rigid support for the water sample temporary storage cylinder, reduce the disturbance of the sampling module by groundwater flow or equipment vibration, and prevent the device from sliding or offsetting during the sampling process;

[0030] The water sampled by the sampling module is pumped into the detection installation box, and different types of indicators such as groundwater pH, conductivity, heavy metals and VOCs are tested through a multi-parameter sensing unit. The test data is sent to the external control center in real time. The external control center conducts intelligent data analysis and rapid tracing of pollution sources, which can effectively monitor the risk of groundwater pollution and greatly improve the efficiency of groundwater pollution emergency response. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 Schematic diagram of the external structure of the sampling module of the present invention;

[0033] Figure 3 is a cross-sectional view of the sampling module of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the trapezoidal sliding block of the present invention;

[0035] Figure 5 is a top view of the connection between the arc-shaped abutment plate and the upper annular plate of the present invention;

[0036] Figure 6 It is a top view of the annular fixed support plate of the present invention.

[0037] Among them, 1-fixed support module, 10-annular fixed support plate, 11-sliding guide cylinder, 110-auxiliary horizontal support rod, 12-adjusting sliding groove, 120-second hydraulic cylinder, 121-sliding mounting block, 122-internal threaded port, 123-threaded plug column, 124-installation recess, 2-sampling module, 20-sampling tube, 200-sampling branch pipe, 201-filter plate, 21-water sample temporary storage cylinder, 22-upper annular plate, 220-trapezoidal sliding block, 221-sliding adjustment groove, 222-through port, 223-horizontal grab bar, 224-arc-shaped abutment plate, 225-protrusion, 226-arc-shaped scraper, 23- Lower annular plate, 24-filter screen, 25-second hydraulic cylinder, 3-detection installation module, 30-power chain, 31-installation platform, 32-detection installation box, 320-connecting hose, 321-liquid pump, 33-multi-parameter sensing unit, 330-mounting frame, 331-pH sensor, 332-conductivity sensor, 333-heavy metal electrode array, 334-VOCs detection probe, 34-vertical sliding plate, 340-card block, 341-card interface, 342-electric telescopic rod, 343-horizontal sliding groove, 35-horizontal mounting plate, 350-sliding bar, 36-vertical connecting rod, 4-controller. DETAILED DESCRIPTION

[0038] In order to further understand the content of the present invention, the present invention is described in detail below through examples.

[0039] Example 1: Figure 1 As shown, a rapid identification device for groundwater pollution in a solid waste landfill includes a fixed support module 1 installed at the upper end of a monitoring well, a sampling module 2 connected to the fixed support module 1, a detection installation module 3 connected to the sampling module 2, and a controller. The controller adopts existing technology, for example, a PLC controller with model CP1L-EA40DR-A can be used;

[0040] The fixed support module 1 includes an annular fixed support plate 10 provided at the periphery of the monitoring well, a sliding guide cylinder 11 provided at the center of the annular fixed support plate 10 and passing through an auxiliary horizontal support rod 110, and a vertical connecting rod 36 that can slide up and down along the inner wall of the sliding guide cylinder 11. When the fixed support module 1 is in use, the annular fixed support plate 10 is fixed at the periphery of the monitoring well. When the vertical connecting rod 36 moves downward, it slides along the inner wall of the sliding guide cylinder 11, providing a guide for the movement of the vertical connecting rod 36, which can further improve the installation stability of the sampling module 2;

[0041] like Figure 6As shown, the upper end of the annular fixed support plate 10 is provided with four adjustment sliding grooves 12 in a divergent shape. A sliding mounting block 121 is slidably connected to each adjustment sliding groove 12 through a horizontally placed second hydraulic cylinder 120. The sliding mounting block 121 is provided with an internal threaded opening 122, and a threaded plug column 123 is threadedly connected to the internal threaded opening 122. The upper end of the threaded plug column 123 is provided with a mounting recess 124 for accommodating an external drive drill bit. When the annular fixed support plate 10 is installed at the periphery of the monitoring well, the internal threads on each sliding mounting block 121 can be screwed in. The threaded plug-in column 123 is inserted through the opening 122, and the external drive drill bit is abutted against the installation recess 124. Under the action of the external drive drill bit, the drill bit is inserted downward into the soil, thereby completing the fixed installation of the annular fixed support plate 10. When the position of the fixed point needs to be adjusted, the corresponding sliding mounting block 121 is driven by the second hydraulic cylinder 120 to slide in the adjustment sliding groove 12, thereby optimizing the fixing effect of the annular fixed support plate 10. Among them, the second hydraulic cylinder 120 adopts the existing technology, for example, the C25 / D25 series hydraulic cylinder can be used;

[0042] like Figure 2 、 3 4, the sampling module 2 includes a water sample temporary storage cylinder 21 with a sampling tube 20 at the bottom, an upper annular plate 22 and a lower annular plate 23 connected to the upper and lower ends of the water sample temporary storage cylinder 21, and a filter screen 24 sleeved on the outer wall of the sampling tube 20, wherein the filter screen 24 adopts existing technology, for example, GF / A glass fiber can be used;

[0043] A trapezoidal sliding block 220 that can slide up and down along its inner wall is provided at the center of the upper annular plate 22. Four sliding adjustment grooves 221 are evenly arranged on the side wall of the trapezoidal sliding block 220 along the circumferential direction. Four through-holes 222 are provided on the inner wall of the upper annular plate 22 corresponding to the positions of the sliding adjustment grooves 221. Each through-hole 222 is slidably connected to a horizontal grab bar 223. One end of the horizontal grab bar 223 is slidably connected to the corresponding sliding adjustment groove 221, and the other end extends to the outside of the through-hole 222. The structure of the lower annular plate 23 is the same as that of the upper annular plate 22, and the corresponding trapezoidal sliding blocks 220 in the lower annular plate 23 are symmetrically distributed with the trapezoidal sliding blocks 220 in the upper annular plate 22. The two trapezoidal sliding blocks 220 are connected by a second hydraulic cylinder 25.

[0044] The detection installation module 3 includes a mounting platform 31 with a power chain 30 at the bottom end, a detection installation box 32 provided on the mounting platform 31, a multi-parameter sensing unit 33 provided in the detection installation box 32, a vertical sliding plate 34 provided on the mounting platform 31 and close to one side of the monitoring well, a horizontal mounting plate 35 that can slide up and down along the vertical sliding plate 34, and a vertical connecting rod 36 for connecting the horizontal mounting plate 35 and the upper annular plate 22. The water sample temporary storage cylinder 21 and the detection installation box 32 are connected by a connecting hose 320, and a liquid pump 321 is provided at the connection. The horizontal mounting plate 35 is driven by an existing hydraulic cylinder and slides up and down on the side wall of the vertical sliding plate 34.

[0045] The multi-parameter sensing unit 33 includes a mounting frame 330 connected to the inner wall of the detection mounting box 32, a pH sensor 331, a conductivity sensor 332, a heavy metal electrode array 333 and a VOCs detection probe 334 arranged on the mounting frame 330. The pH sensor 331 can measure the pH value in the groundwater, the conductivity sensor 332 can measure the conductivity of the electrolyte in the groundwater, the heavy metal electrode array 333 is specifically used to detect heavy metal ions in the groundwater, and the VOCs detection probe 334 is responsible for detecting the content of volatile organic compounds in the groundwater. The multi-parameter sensing unit 33 can detect multiple parameters at the same time, and can detect different types of indicators such as pH value, conductivity, heavy metals and VOCs, and can detect the content of volatile organic compounds in the groundwater. A comprehensive and integrated assessment of the water pollution status helps to more accurately determine the source, type and severity of groundwater pollution, and provide more comprehensive data support for subsequent pollution control and prevention measures. Among them, the pH sensor 331, the conductivity sensor 332, the heavy metal electrode array 333 and the VOCs detection probe 334 respectively adopt existing technologies. For example, the pH sensor 331 can adopt a glass electrode pH sensor, the conductivity sensor 332 can adopt a conductivity sensor with model number BX-M504, the heavy metal electrode array 333 can adopt an ion selective electrode, a voltammetry sensor and an optical sensor, and the VOCs detection probe 334 can adopt a VOCs detection probe with model number MQ-135.

[0046] Example 2: This example discloses a method for rapidly identifying groundwater pollution in a solid waste landfill, based on a device for rapidly identifying groundwater pollution in a solid waste landfill in Example 1, comprising the following steps:

[0047] S1. Move the main body of the equipment to the vicinity of the monitoring well through the power chain 30, and drive the horizontal mounting plate 35 downward through the power equipment. When the annular fixed support plate 10 is installed at the periphery of the monitoring well, the threaded plug-in column 123 can be inserted through the internal threaded opening 122 on each sliding mounting block 121, and the external drive drill bit is abutted against the mounting recess 124. Under the action of the external drive drill bit, it is inserted downward into the soil, thereby completing the fixed installation of the annular fixed support plate 10. At this time, the horizontal mounting plate 35 is continued to be driven downward by the power equipment. When the vertical connecting rod 36 moves downward, it slides along the inner wall of the sliding guide cylinder 11, providing guidance for the movement of the vertical connecting rod 36. When the sampling module 2 moves to the preset depth in the monitoring well, it is ready;

[0048] S2. When the two trapezoidal sliding blocks 220 are driven toward or away from each other by the second hydraulic cylinder 25, each horizontal grab bar 223 moves along the corresponding sliding adjustment slot 221 toward or away from the trapezoidal sliding block 220. The inclined surface of the trapezoidal sliding block 220 cooperates with the sliding adjustment slot 221 to convert the linear motion of the second hydraulic cylinder 25 into radial expansion and contraction of the horizontal grab bar 223, so that the horizontal grab bar 223 abuts against the inner wall of the monitoring well of various inner diameters, thereby forming a rigid support for the water sample temporary storage cylinder 21.

[0049] S3. The groundwater in the monitoring well is pumped into the water sample temporary storage cylinder 21 through the sampling pipe 20 by the liquid pump 321, and the solid impurities in the water are removed by the filter screen 24. Then, the groundwater is pumped into the detection installation box 32 through the connecting hose 320. Then, the pH sensor 331 can measure the acidity and alkalinity of the groundwater. The conductivity sensor 332 can measure the conductivity of the electrolyte in the groundwater. The heavy metal electrode array 333 is specifically used to detect heavy metal ions in the groundwater. The VOCs detection probe 334 is responsible for detecting the content of volatile organic compounds in the groundwater and sending the test results to the controller 4. The controller 4 sends the signal to the external control center through wireless communication, and the external control center evaluates the pollution status of the groundwater (it should be noted that this application does not involve any improvement to the above-mentioned controller 4 and the external control center connected thereto. The structure, connection relationship and working principle of the two are all existing technologies. The evaluation method is also evaluated according to the current industry standards. This application does not involve a new evaluation method).

[0050] Example 3: This example differs from Example 1 in that:

[0051] like Figure 5As shown, an arc-shaped abutment plate 224 is provided on one end of the horizontal grab bar 223 outside the through-hole 222, which fits the inner wall of the monitoring well. Ten protrusions 225 are evenly provided on the side wall of the arc-shaped abutment plate 224. An arc-shaped scraper 226 is provided at the bottom end of the arc-shaped abutment plate 224 along its arc length direction, which converts the linear motion of the second hydraulic cylinder 25 into radial expansion and contraction of the horizontal grab bar 223, so that the arc-shaped abutment plate 224 abuts against the inner wall of the monitoring well of various inner diameters, thereby forming a rigid support for the water sample temporary storage tube 21, reducing the disturbance of the sampling module 2 caused by groundwater flow or equipment vibration, and ensuring the stability of the detection data of the multi-parameter sensing unit 33. By providing a number of protrusions 225 on the arc-shaped abutment plate 224, the friction between the arc-shaped abutment plate 224 and the well wall can be increased, thereby preventing the device from sliding or offsetting during the sampling process.

[0052] Four sampling branches 200 are provided on the outer wall of the sampling tube 20, and a filter plate 201 is buckled at the water inlet of each sampling branch 200. The mesh number of the filter plate 201 is larger than the mesh number of the filter screen 24. The groundwater is synchronously pumped into the water sample temporary storage cylinder 21 through each sampling branch 200, which significantly shortens the sampling time. At the same time, the groundwater is preliminarily filtered through the filter screen 24, and then secondary filtered through the filter plates 201 at the water inlets of each sampling branch 200, which can effectively remove suspended particles in the groundwater and ensure that the test data truly reflects the concentration of dissolved pollutants. Among them, the filter plate 201 adopts existing technology, for example, a filter plate of a plate and frame filter press can be used;

[0053] A card block 340 is provided on the vertical sliding plate 34, and a card interface 341 is provided on the side wall of the card block 340. One end of the horizontal mounting plate 35 is inserted into the card interface 341 and connected to the side wall of the card interface 341 through an electric telescopic rod 342. This can achieve precise adjustment of the horizontal position of the sampling module 2, thereby improving the accuracy of the sampling position. This method is more efficient and reduces the complexity and time cost of operation. Among them, the electric telescopic rod 342 adopts existing technology, for example, the electric telescopic rod model JVL-200L can be used;

[0054] Horizontal sliding grooves 343 are provided at the upper and lower ends of the card interface 341, and the upper and lower ends of the horizontal mounting plate 35 are slidably connected to the corresponding horizontal sliding grooves 343 through sliding bars 350. When the electric telescopic rod 342 drives the horizontal mounting plate 35 to move in the card block 340, the sliding bar 350 slides in the horizontal sliding groove 343 to ensure that the horizontal mounting plate 35 moves in a predetermined direction, thereby avoiding the horizontal mounting plate 35 from deflecting or shaking during the movement, thereby improving the stability of the entire structure in horizontal movement.

[0055] Example 4: This example differs from Example 2 in that:

[0056] In step S2, the inclined surface of the trapezoidal sliding block 220 cooperates with the sliding adjustment groove 221 to convert the linear motion of the second hydraulic cylinder 25 into radial expansion and contraction of the horizontal grab bar 223, so that the arc-shaped abutment plate 224 abuts against the inner wall of the monitoring wells of various inner diameters, thereby forming a rigid support for the water sample temporary storage cylinder 21;

[0057] In step S3, groundwater is simultaneously pumped into the water sample temporary storage cylinder 21 through each sampling branch pipe 200, and the groundwater is initially filtered through the filter screen 24. Then, the groundwater is secondary filtered through the filter plate 201 at the water inlet of each sampling branch pipe 200, which can effectively remove suspended particles in the groundwater.

[0058] In step S1, when it is necessary to adjust the horizontal position of the vertical connecting rod 36 to ensure that the sampling module 2 connected to its bottom end is accurately moved into the monitoring well, at this time, the equipment body is moved to the vicinity of the monitoring well through the power chain 30, and the horizontal mounting plate 35 is driven by the electric telescopic rod 342 to move toward the monitoring well in the clamping block 340 until the sampling module 2 is located at the upper end of the monitoring well.

Claims

1. A rapid identification device for groundwater pollution in solid waste landfills, characterized in that: It comprises a fixed support module (1) installed at the upper end of a monitoring well, a sampling module (2) connected to the fixed support module (1), a detection installation module (3) connected to the sampling module (2), and a controller (4); The sampling module (2) comprises a water sample temporary storage cylinder (21) with a sampling tube (20) provided at the bottom end, an upper annular plate (22) and a lower annular plate (23) respectively connected to the upper and lower ends of the water sample temporary storage cylinder (21), and a filter screen (24) sleeved on the outer wall of the sampling tube (20); A trapezoidal sliding block (220) is provided at the center of the upper annular plate (22) and can slide up and down along its inner wall. The side wall of the trapezoidal sliding block (220) is evenly provided with a plurality of sliding adjustment grooves (221) along the circumferential direction. The inner wall of the upper annular plate (22) is provided with a plurality of through-holes (222) corresponding to the positions of the sliding adjustment grooves (221). Each through-hole (222) is slidably connected to a horizontal grab bar (223). One end of the horizontal grab bar (223) is slidably connected to the corresponding sliding adjustment groove (221), and the other end extends to the outside of the through-hole (222). The lower annular plate (23) has the same structure as the upper annular plate (22), and the corresponding trapezoidal sliding block (220) in the lower annular plate (23) is symmetrically distributed with the trapezoidal sliding block (220) in the upper annular plate (22). The two trapezoidal sliding blocks (220) are connected via a second hydraulic cylinder (25). The detection installation module (3) comprises an installation platform (31) with a power chain (30) at the bottom end, a detection installation box (32) arranged on the installation platform (31), a multi-parameter sensing unit (33) arranged in the detection installation box (32), a vertical sliding plate (34) arranged on the installation platform (31) and close to one side of the monitoring well, a horizontal installation plate (35) that can slide up and down along the vertical sliding plate (34), and a vertical connecting rod (36) for connecting the horizontal installation plate (35) and the upper annular plate (22); the water sample temporary storage cylinder (21) and the detection installation box (32) are connected by a connecting hose (320), and a liquid pump (321) is provided at the connection point; The controller (4) is electrically connected to the second hydraulic cylinder (25), the multi-parameter sensing unit (33) and the liquid pump (321).

2. The device for rapid identification of groundwater pollution in a solid waste landfill according to claim 1, characterized in that: An arc-shaped abutment plate (224) is provided on one end of the horizontal grab bar (223) outside the through-hole (222) and is in contact with the inner wall of the monitoring well. A plurality of protrusions (225) are evenly provided on the side wall of the arc-shaped abutment plate (224). An arc-shaped scraper (226) is provided at the bottom end of the arc-shaped abutment plate (224) along its arc length direction.

3. The device for rapid identification of groundwater pollution in a solid waste landfill according to claim 1, characterized in that: A plurality of sampling branches (200) are provided on the outer wall of the sampling tube (20), and a filter plate (201) is buckled at the water inlet of each sampling branch tube (200), and the mesh number of the filter plate (201) is greater than the mesh number of the filter screen (24).

4. The device for rapid identification of groundwater pollution in a solid waste landfill according to claim 1, characterized in that: The fixed support module (1) comprises an annular fixed support plate (10) arranged at the periphery of the monitoring well, a sliding guide cylinder (11) arranged at the center of the annular fixed support plate (10) and passing through an auxiliary horizontal support rod (110), and the vertical connecting rod (36) can slide up and down along the inner wall of the sliding guide cylinder (11).

5. The device for rapid identification of groundwater pollution in a solid waste landfill according to claim 4, characterized in that: The upper end of the annular fixed support plate (10) is provided with a plurality of adjustment sliding grooves (12) in a divergent shape, and a sliding mounting block (121) is slidably connected in each of the adjustment sliding grooves (12) via a horizontally placed second hydraulic cylinder (120), and the sliding mounting block (121) is provided with an internal threaded opening (122), and a threaded plug-in column (123) is threadedly connected at the internal threaded opening (122), and a mounting recess (124) for accommodating an external drive drill bit is provided at the upper end of the threaded plug-in column (123).

6. The device for rapid identification of groundwater pollution in a solid waste landfill according to claim 1, characterized in that: A clamping block (340) is provided on the vertical sliding plate (34), a side wall of the clamping block (340) is provided with a clamping interface (341), and one end of the horizontal mounting plate (35) is inserted into the clamping interface (341) and connected to the side wall of the clamping interface (341) via an electric telescopic rod (342).

7. The device for rapid identification of groundwater pollution in a solid waste landfill according to claim 6, characterized in that: The card interface (341) is provided with horizontal sliding grooves (343) at the upper and lower ends, and the upper and lower ends of the horizontal mounting plate (35) are slidably connected to the corresponding horizontal sliding grooves (343) through sliding bars (350).

8. The device for rapid identification of groundwater pollution in a solid waste landfill according to claim 1, characterized in that: The multi-parameter sensing unit (33) comprises a mounting frame (330) connected to the inner wall of the detection installation box (32), a pH sensor (331) arranged on the mounting frame (330), a conductivity sensor (332), a heavy metal electrode array (333), and a VOCs detection probe (334).

9. A method for rapidly identifying groundwater pollution in a solid waste landfill, based on a device for rapidly identifying groundwater pollution in a solid waste landfill according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Move the main body of the device to the vicinity of the monitoring well through the power chain (30), and drive the horizontal mounting plate (35) downward through the power equipment so that the fixed support module (1) is located on the ground around the monitoring well, and fix the fixed support module (1). At this time, continue to drive the horizontal mounting plate (35) downward through the power equipment. When the vertical connecting rod (36) moves downward, it will slide along the inner wall of the sliding guide cylinder (11), providing guidance for the movement of the vertical connecting rod (36). When the sampling module (2) moves to the preset depth in the monitoring well, it is ready; S2. When the two trapezoidal sliding blocks (220) are driven to move closer to or farther from each other by the second hydraulic cylinder (25), each horizontal grab bar (223) moves along the corresponding sliding adjustment groove (221) toward or away from the trapezoidal sliding block (220). The inclined surface of the trapezoidal sliding block (220) cooperates with the sliding adjustment groove (221) to convert the linear motion of the second hydraulic cylinder (25) into radial expansion and contraction of the horizontal grab bar (223), so that the horizontal grab bar (223) abuts against the inner wall of the monitoring well with various inner diameters, thereby forming a rigid support for the water sample temporary storage cylinder (21); S3, the groundwater in the monitoring well is pumped into the water sample temporary storage cylinder (21) through the sampling pipe (20) by the liquid pump (321), and the solid impurities in the water are removed by the filter (24). Then, the groundwater is pumped into the detection installation box (32) through the connecting hose (320). Then, the pH, conductivity, heavy metals and VOCs indicators in the groundwater are detected by the multi-parameter sensing unit (33), and the detection results are sent to the controller (4). The controller (4) sends the signal to the external control center by wireless communication, and the pollution status of the groundwater is evaluated by the external control center.

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