A groundwater pollution concentration detection and sampling device

Abstract

This invention discloses a groundwater pollution concentration detection and sampling device, belonging to the field of sampling and detection technology. The invention includes a steel cable connected to an external cable-laying device; a pressing assembly fixed to the end of the steel cable away from the external cable-laying device; an outer cylinder detachably mounted on the lower end face of the pressing assembly; a base plate fixed to the lower end face of the outer cylinder; multiple hinge rods, one end of which is circumferentially hinged to the outer wall of the outer cylinder, and the other end is fixed to a support column; a torsion spring is provided at the hinge position between the hinge rod and the outer cylinder; a filter assembly fixed to the lower end face of the base plate; and multiple sampling assemblies mounted on the filter assembly and located inside the outer cylinder. This invention avoids the cumbersome operation of repeatedly raising and lowering the equipment or using multiple independent samplers, significantly improving sampling efficiency and reducing sampling depth errors caused by water flow or equipment shaking.

Description

Technical Field

[0001] This invention relates to the field of sampling and testing devices, specifically a groundwater pollution concentration detection and sampling device. Background Technology

[0002] Groundwater pollution mainly refers to the phenomenon of declining quality caused by changes in the chemical composition, physical properties, and biological characteristics of groundwater due to human activities. The strata below the Earth's surface are complex, and groundwater flows slowly. Therefore, groundwater pollution is characterized by its slow process, difficulty in detection, and difficulty in remediation. Once groundwater is polluted, even if the source of pollution is completely eliminated, it takes a considerable amount of time for the water quality to recover.

[0003] Existing groundwater sampling devices involve moving the device to the desired sampling depth and then activating the pump to extract the sample when sampling groundwater at different depths. However, when sampling deep groundwater, the pipeline connected to the pump is too long, affecting the pumping effect. Furthermore, at deeper depths, the distance of the sensor may be insufficient, making it difficult to control the sampling device, accurately determine the sampling depth, and affect the sampling and testing results.

[0004] To address the above problems, this invention provides a groundwater pollution concentration detection and sampling device to solve these issues. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a groundwater pollution concentration detection and sampling device, comprising: a steel cable connected to an external cable laying device; a pressing assembly fixed to the end of the steel cable away from the external cable laying device; an outer cylinder detachably mounted on the lower end face of the pressing assembly; a base plate fixed to the lower end face of the outer cylinder; multiple hinge rods configured, one end of which is circumferentially hinged to the outer wall of the outer cylinder; and the other end is fixed to a support column, and a torsion spring is provided at the hinge position between the hinge rod and the outer cylinder; a filter assembly fixed to the lower end face of the base plate; and multiple sampling assemblies configured and mounted on the filter assembly and located inside the outer cylinder.

[0006] Preferably, the pressing assembly includes: a top plate with a plurality of fixed discs fixed to its lower end face, the plurality of fixed discs corresponding one-to-one with the plurality of sampling assemblies; a guide post slidably disposed within the fixed discs, and a pressing spring sleeved on its outer wall; and a pressing chamber fixed to the lower end face of the guide post.

[0007] Preferably, the filter assembly includes: a support plate fixed to the lower end face of the base plate, and the support plate having multiple placement slots corresponding to the sampling component; a filter chamber, which is hemispherical, fixed to the lower end face of the support plate, and the filter chamber having multiple filter holes; a rotating shaft rotatably disposed at the axial center of the support plate; a connecting shaft, one end of which is fixed inside the rotating shaft, and the other end of which is rotatably disposed inside the filter chamber; multiple water flow blades, which are circumferentially fixed to the outer wall of the rotating shaft; and a cleaning rod, which is an arc-shaped rod fixed to the end of the connecting shaft near the filter chamber, and the cleaning rod has the same curvature as the filter chamber, and multiple flexible brushes are fixed on the side of the cleaning rod near the filter chamber.

[0008] Preferably, the sampling assembly includes: a sampling cylinder installed in the placement groove and pressed and fixed by the pressing assembly; at least two limiting assemblies symmetrically installed inside the sampling cylinder near the bottom; a plug corresponding to each limiting assembly and sealed inside the sampling cylinder; a pressure regulating assembly coaxially fixed inside the sampling cylinder; and a piston slidably disposed inside the sampling cylinder.

[0009] Preferably, the sampling cylinder has an internal pressure chamber, the piston is slidably disposed in the pressure chamber, and the top of the pressure chamber is pressurized by an air inlet, a valve is installed on the air inlet, and a connecting chamber is formed in the middle of the inner wall of the sampling cylinder, the top of the connecting chamber is connected to the pressure chamber, and the bottom of the connecting chamber is connected to the limiting component.

[0010] Preferably, the limiting component includes: a sliding column, which is slidably disposed in the communicating chamber; an adjusting block, which is threadedly connected in the communicating chamber and a tension spring is provided between the adjusting block and the sliding column, the adjusting block having a slot at one end away from the sliding column and an air hole at the middle position of the adjusting block; and a limiting block, which is fixed to the end of the sliding column away from the adjusting block and has a guide surface.

[0011] Preferably, the pressure regulating assembly includes: a pressure regulating chamber fixed inside the sampling cylinder; at least two limiting holes symmetrically opened on the pressure regulating chamber and corresponding one-to-one with the positions of the limiting blocks; a water inlet obliquely opened on the outer wall of the pressure regulating chamber; a second plug sealed and installed at the bottom of the pressure regulating chamber; a pressure regulating column slidably disposed inside the pressure regulating chamber; a pressure regulating plate threadedly connected inside the pressure regulating chamber and slidably connected to the pressure regulating column by a sliding block, and the pressure regulating plate has multiple through holes circumferentially opened; and a pressure regulating spring installed between the pressure regulating plate and the pressure regulating column.

[0012] Preferably, the side wall of the pressure regulating column is provided with a limiting groove, the sliding block is slidably disposed in the sliding groove, a limiting plate is fixed near the limiting hole of the pressure regulating column, the side wall of the limiting plate is provided with an annular limiting groove, a sealing head is fixed on the lower end face of the limiting plate, the sealing head is a conical structure, a cross groove is provided at its bottom, the cross groove corresponds to the second plug, and a plurality of through holes are provided on the circumference of the limiting plate.

[0013] Compared with existing technologies, this invention provides a groundwater pollution concentration detection and sampling device with the following advantages: This invention uses multiple independent sampling components in conjunction with a pressing component and a pressure regulating component. After the device is lowered to the target depth in one go, different sampling cylinders can be triggered sequentially or selectively for sampling. This avoids the cumbersome operation of repeatedly raising and lowering the equipment or using multiple independent samplers, significantly improving sampling efficiency. Furthermore, by injecting different air pressures into the sampling components before sampling and adjusting the pressure through the pressure regulating component, automatic sampling is achieved upon reaching the sampling depth, avoiding sensor triggering and the problem of sensor failure at greater depths. Additionally, by connecting external cable-laying equipment and using support columns for positioning on the well wall, the device can stably remain at the preset precise depth for sampling, reducing sampling depth errors caused by water flow or equipment shaking. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0016] Figure 3 This is a cross-sectional view of the filter component in this invention;

[0017] Figure 4 This is a cross-sectional view of the sampling component in this invention.

[0018] Figure 5 for Figure 4 A magnified structural diagram at point A;

[0019] Figure 6 This is a schematic diagram of the voltage regulating component in this invention;

[0020] Figure 7 This is a schematic diagram of the pressure regulating column in this invention;

[0021] In the diagram: 1. Steel cable; 2. Pressing assembly; 3. Outer cylinder; 4. Base plate; 5. Hinge rod; 6. Support column; 7. Filter assembly; 8. Sampling assembly; 21. Top plate; 22. Fixing plate; 23. Guide column; 24. Pressing chamber; 71. Support plate; 72. Filter chamber; 73. Placement slot; 74. Rotating shaft; 75. Connecting shaft; 76. Water flow vane; 77. Cleaning rod; 81. Sampling cylinder; 82. Pressure chamber; 83. Connecting chamber; 84. Air inlet; 85. Plug one; 86. Limiting assembly Components; 87. Pressure regulating assembly; 88. Piston; 861. Sliding column; 862. Adjusting block; 863. Limiting block; 871. Pressure regulating chamber; 872. Limiting hole; 873. Water inlet; 874. Plug two; 875. Pressure regulating column; 876. Pressure regulating plate; 877. Through hole two; 878. Sliding block; 879. Pressure regulating spring; 8751. Sliding groove; 8752. Limiting plate; 8753. Through hole one; 8754. Limiting groove; 8755. Plug head; 8756. Cross groove. Detailed Implementation

[0022] Reference Figures 1-7 This invention provides a technical solution: a groundwater pollution concentration detection and sampling device, comprising: a steel cable 1 connected to an external cable laying device; a pressing component 2 fixed to the end of the steel cable 1 away from the external cable laying device; an outer cylinder 3 detachably mounted on the lower end face of the pressing component 2; a base plate 4 fixed to the lower end face of the outer cylinder 3; multiple hinge rods 5, one end of which is circumferentially hinged to the outer wall of the outer cylinder 3, and the other end is fixed to a support column 6, and a torsion spring is provided at the hinge position between the hinge rod 5 and the outer cylinder 3; a filter component 7 fixed to the lower end face of the base plate 4; and multiple sampling components 8, mounted on the filter component 7 and located inside the outer cylinder 3.

[0023] It is important to note that before sampling, the water pressure at the sampling depth needs to be measured so that the sampling component 8 can be adjusted adaptively according to the water pressure at different depths, and finally the automatic sampling at the sampling depth can be completed.

[0024] By using multiple independent sampling components 8, after the device is lowered to the target depth once, different sampling components 8 can be triggered sequentially or selectively to perform sampling, avoiding the cumbersome operation of repeatedly raising and lowering the device or using multiple independent samplers, and significantly improving sampling efficiency.

[0025] In this embodiment, the pressing component 2 includes: a top plate 21, on which a plurality of fixed disks 22 are fixedly fixed, and the plurality of fixed disks 22 correspond one-to-one with the plurality of sampling components 8; a guide post 23, which is slidably disposed in the fixed disks 22, and whose outer wall is sleeved with a pressing spring; and a pressing chamber 24, which is fixed to the lower end surface of the guide post 23.

[0026] In other words, the sampling component 8 can be quickly disassembled by pressing component 2, and the pressing spring of pressing chamber 24 can press and clamp the sampling component 8 at different heights, improving adaptability;

[0027] In addition, when pressing and clamping the sampling component 8, first lift the pressing component 2 as a whole to separate it from the outer cylinder 3. Then, place the multiple adjusted sampling components 8 into the upper end face of the filter component 7, that is, inside the outer cylinder 3. Then, install the pressing component 2 onto the outer cylinder 3. At this time, the multiple pressing chambers 24 need to correspond one-to-one with the multiple sampling components 8 to complete the installation of the sampling components 8.

[0028] In this embodiment, the filter assembly 7 includes: a support plate 71, fixed to the lower end face of the base plate 4, and the support plate 71 has a plurality of placement slots 73 corresponding to the sampling assembly 8; a filter chamber 72, which is hemispherical, fixed to the lower end face of the support plate 71, and the filter chamber 72 has a plurality of filter holes; a rotating shaft 74, rotatably disposed at the axial center of the support plate 71; a connecting shaft 75, one end of which is fixed inside the rotating shaft 74, and the other end of which is rotatably disposed inside the filter chamber 72; multiple water flow blades 76, which are circumferentially fixed to the outer wall of the rotating shaft 74; and a cleaning rod 77, which is an arc-shaped rod, fixed to the end of the connecting shaft 75 near the filter chamber 72, and the cleaning rod 77 has the same curvature as the filter chamber 72, and a plurality of flexible brushes are fixed on the side of the cleaning rod 77 near the filter chamber 72.

[0029] When the device descends, groundwater is filtered through the filter holes of the filter chamber 72. At this time, the water flows into the filter chamber 72 through the filter holes and provides rotational power for the water flow vanes 76. The rotation of the rotating shaft 74 drives the connecting shaft 75 to rotate, thereby cleaning the filter holes with the flexible brush on the cleaning rod 77, preventing debris in the groundwater from clogging the filter holes. Furthermore, the rotation of the water flow vanes 76 can also guide the water entering the filter chamber 72, so that the water in the filter chamber 72 is in a flowing state when the sampling component 8 is not turned on, preventing shallow groundwater from being carried into deeper layers and affecting the sampling results.

[0030] In a preferred embodiment, the sampling assembly 8 includes: a sampling cylinder 81, installed in the placement groove 73 and pressed and fixed by the pressing assembly 2; at least two limiting assemblies 86, symmetrically installed inside the sampling cylinder 81 near the bottom; a plug 85, corresponding one-to-one with the limiting assembly 86, and sealed inside the sampling cylinder 81; a pressure regulating assembly 87, coaxially fixed inside the sampling cylinder 81; and a piston 88, slidably disposed inside the sampling cylinder 81.

[0031] In a preferred embodiment, the sampling cylinder 81 has an internal pressure chamber 82, and the piston 88 is slidably disposed within the pressure chamber 82. The top of the pressure chamber 82 is pressurized by an air inlet 84, and a valve is installed on the air inlet 84. A connecting chamber 83 is annularly formed in the middle of the inner wall of the sampling cylinder 81. The top of the connecting chamber 83 is connected to the pressure chamber 82, and the bottom of the connecting chamber 83 is connected to the limiting component 86.

[0032] Before using the sampling component 8, the plug 85 is disassembled to adjust the distance between the limiting component 86 and the pressure regulating component 87, thus adapting to sampling at different depths. The pressure regulating component 87 is then adjusted, and high-pressure gas is injected into the air inlet 84 via an external pressurizing device. This allows for adaptive adjustment based on the groundwater pressure at different depths (the water pressure at the sampling depth must be greater than the overall pressure of the pressure regulating component 87 and the pressure chamber 82). In other words, the deeper the sampling depth, the higher the groundwater pressure, resulting in higher pressure within the pressure chamber 82 and a greater distance between the limiting component 86 and the pressure regulating component 87. This ensures that the water pressure at the sampling depth can pass through the pressure regulating component 87 into the pressure chamber 82. Simultaneously, the incoming water pushes the piston 88 away from the pressure regulating component 87, thus completing negative pressure extraction, achieving automatic sampling at the designated location, and improving the accuracy of the sampling depth.

[0033] In a preferred embodiment, the limiting component 86 includes: a sliding post 861, which is slidably disposed within the communicating chamber 83; an adjusting block 862, which is threadedly connected within the communicating chamber 83, and a tension spring is provided between the adjusting block 862 and the sliding post 861; a slot is provided at one end of the adjusting block 862 away from the sliding post 861; and an air hole is provided at the middle position of the adjusting block 862.

[0034] The limiting block 863 is fixed at one end of the sliding column 861 away from the adjusting block 862, and the limiting block 863 is provided with a guide surface.

[0035] When piston 88 is pushed away from pressure regulating component 87 by groundwater, piston 88 pushes gas in pressure chamber 82 toward connecting chamber 83, thereby pushing sliding column 861. When piston 88 is at the top of pressure chamber 82, limit block 863 on sliding column 861 is inserted into pressure regulating component 87, thereby resetting pressure regulating component 87, closing pressure regulating component 87, and completing sampling.

[0036] In addition, when adjusting the distance of the limiting component 86, the slot of the adjusting block 862 is engaged by an external tool, so that the thread of the adjusting block 862 rotates, thereby adjusting the distance between the adjusting block 862 and the pressure regulating component 87. It should be noted that the sliding column 861 can only slide, and the closer the adjusting block 862 is to the pressure regulating component 87, the less pressure is required to push the sliding column 861 and the limiting block 863 (that is, the less force is required to stretch the tension spring), thereby completing the automatic limiting closure after sampling and improving the sampling accuracy.

[0037] In a preferred embodiment, the pressure regulating assembly 87 includes: a pressure regulating chamber 871, fixed inside the sampling cylinder 81; at least two limiting holes 872, symmetrically opened on the pressure regulating chamber 871, and corresponding one-to-one with the positions of the limiting blocks 863; a water inlet 873, obliquely opened on the outer wall of the pressure regulating chamber 871; a plug 874, sealingly installed at the bottom of the pressure regulating chamber 871; a pressure regulating column 875, slidably disposed inside the pressure regulating chamber 871; a pressure regulating plate 876, threadedly connected inside the pressure regulating chamber 871, and slidably connected to the pressure regulating column 875 by a sliding block 878, and the pressure regulating plate 876 has multiple through holes 877 on its circumference; and a pressure regulating spring 879, installed between the pressure regulating plate 876 and the pressure regulating column 875.

[0038] In a preferred embodiment, the side wall of the pressure regulating column 875 is provided with a sliding groove 8751, and the sliding block 878 is slidably disposed in the sliding groove 8751. A limiting plate 8752 is fixed at the position of the pressure regulating column 875 near the limiting hole 872. An annular limiting groove 8754 is provided on the side wall of the limiting plate 8752. A sealing head 8755 is fixed on the lower end face of the limiting plate 8752. The sealing head 8755 has a conical structure and a cross groove 8756 is provided at its bottom. The cross groove 8756 corresponds to the second sealing head 874. A plurality of through holes 8753 are provided on the circumference of the limiting plate 8752.

[0039] In other words, when adjusting the pressure regulating component 87 before sampling, the plug 874 is first removed, and then the cross groove 8756 of the plug 8755 is rotated using an external tool, thereby driving the pressure regulating plate 876 to rotate. This causes the plate to move up and down through the threaded connection with the pressure regulating chamber 871, thus adjusting the pressure regulating spring 879. This, in conjunction with the air pressure in the air pressure chamber 82, adjusts the overall pressure to adapt to sampling at various depths. Furthermore, the dual pressure regulation allows for adjustment of water pressure at deeper depths, thereby completing the automatic sampling process.

[0040] It should be noted that when the groundwater pressure pushes the sealing head 8755 to slide open, the bottom height of the limiting plate 8752 should not exceed the lowest point of the limiting hole 872 to prevent groundwater from flowing out through the limiting hole 872. When the piston 88 slides to the top of the air pressure chamber 82, the limiting block 863 contacts the limiting groove 8754 through the guide surface, thereby pushing the sealing head 8755 to slide down and reset, completing the closure. This prevents groundwater from different depths from mixing, which would affect the sampling accuracy.

[0041] Specifically, by using multiple independent sampling components 8 in conjunction with the pressing component 2 and the pressure regulating component 87, different sampling cylinders 81 can be triggered sequentially or selectively for sampling after the device is lowered to the target depth in one go. In other words, by adjusting the pressure inside the sampling components 8, it can adapt to the groundwater pressure at different depths, thereby selectively triggering the device and avoiding the cumbersome operation of repeatedly raising and lowering the equipment or using multiple independent samplers, significantly improving sampling efficiency. After sampling, the pressure regulating component 87 can be reset and closed by the limiting component 86 to prevent the mixing of groundwater at different depths. Before sampling, the internal pressure of the sampling components 8 is adjusted by injecting different air pressures into the sampling components 8 and the pressure regulating component 87, thereby achieving automatic sampling at the sampling depth and avoiding the problem of sensor failure at greater depths caused by sensor triggering. Furthermore, by connecting the external laying equipment through the steel cable 1 and combining the support column 6 for support and positioning on the well wall, it is ensured that the device can stably stay at the preset accurate depth for sampling, reducing sampling depth errors caused by water flow or equipment shaking.

[0042] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A groundwater pollution concentration detection and sampling device, characterized in that, include: Steel cable, connected to external cable laying equipment; The pressing component is fixed to the end of the steel cable away from the external cable laying equipment; The outer cylinder is detachably mounted on the lower end face of the pressing component; The base plate is fixed to the lower end face of the outer cylinder; Multiple hinge rods are configured, with one end circumferentially hinged to the outer wall of the outer cylinder; and the other end is fixed to a support column, and a torsion spring is provided at the hinge position between the hinge rod and the outer cylinder; The filter assembly is fixed to the lower end face of the base plate; Multiple sampling components are configured and mounted on the filter assembly, located inside the outer cylinder; The filtering components include: The support plate is fixed to the lower end of the base plate, and the support plate has multiple placement slots corresponding to the sampling components. The filter chamber is hemispherical and fixed to the lower end of the support plate, and has multiple filter holes. The rotating shaft is rotatably positioned at the center of the support plate. The connecting shaft has one end fixed inside the rotating shaft and the other end rotatably installed inside the filter chamber. Multiple water flow blades are configured and circumferentially fixed to the outer wall of the rotating shaft; The cleaning rod is an arc-shaped rod fixed to the end of the connecting shaft near the filter chamber, and the arc of the cleaning rod is the same as that of the filter chamber. Multiple flexible brushes are fixed on the side of the cleaning rod near the filter chamber. The sampling components include: The sampling tube is installed in the placement slot and is pressed and fixed by the pressing component; At least two limiting components are symmetrically installed inside the sampling cylinder near the bottom. The first plug corresponds to a limit component and is sealed inside the sampling cylinder; The pressure regulating component is coaxially fixed inside the sampling cylinder; The piston is slidably positioned inside the sampling cylinder; The sampling cylinder has an internal pressure chamber, and a piston seal is slidably installed inside the pressure chamber. The pressure chamber is regulated by air intake through an air inlet at the top, and a valve is installed on the air inlet. A connecting chamber is annularly formed in the middle of the inner wall of the sampling cylinder. The top of the connecting chamber is connected to the pressure chamber, and the bottom of the connecting chamber is connected to the limiting component. The limit components include: A sliding column, with a sealed sliding arrangement, is installed inside the connecting compartment; The adjusting block is threadedly connected to the connecting chamber, and a tension spring is provided between it and the sliding column. A slot is opened at the end of the adjusting block away from the sliding column, and an air hole is opened in the middle of the adjusting block. A limiting block is fixed at the end of the sliding column away from the adjusting block, and a guide surface is provided on the limiting block; The voltage regulating component includes: The pressure regulating chamber is fixed inside the sampling cylinder; There are at least two limiting holes, which are symmetrically opened on the pressure regulating chamber and correspond one-to-one with the position of the limiting block; The inlet is angled and located on the outer wall of the surge tank; The second plug is installed at the bottom of the pressure regulating chamber for sealing. The pressure regulating column is slidably installed inside the pressure regulating chamber; The pressure regulating plate is threadedly connected inside the pressure regulating chamber and is slidably connected to the pressure regulating column by a sliding block. The pressure regulating plate has multiple through holes on its circumference. The pressure adjusting spring is installed between the pressure adjusting plate and the pressure adjusting column.

2. A groundwater pollution concentration detection and sampling device according to claim 1, characterized in that, The press component includes: The top plate has multiple fixed plates fixed to its lower end face, and each fixed plate corresponds to a sampling component. The guide post is slidably mounted inside the fixed plate, and a pressing spring is sleeved on its outer wall; The pressing chamber is fixed to the lower end face of the guide column.

3. A groundwater pollution concentration detection and sampling device according to claim 1, characterized in that, The side wall of the pressure regulating column is provided with a sliding groove, and the sliding block is slidably disposed in the sliding groove. A limit plate is fixed near the limit hole of the pressure regulating column. The side wall of the limit plate is provided with an annular limit groove. A sealing head is fixed on the lower end face of the limit plate. The sealing head has a conical structure and a cross groove is provided at its bottom. The cross groove corresponds to the second plug. Multiple through holes are provided on the circumference of the limit plate.

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