Underground water real-time monitoring well

Abstract

The utility model relates to the technical field of hydrological monitoring, and discloses an underground water real-time monitoring well which comprises a monitoring well. The monitoring analysis module comprises a processor, and an electronic dynamometer, a range finder and a pressure sensor which are electrically connected with the processor; the movable pulley is connected with the electronic dynamometer, the electronic dynamometer is used for measuring the stress of the movable pulley, a connecting rope is wound around the movable pulley, and one end of the connecting rope is located in the monitoring well and connected with a density ball; the hoisting mechanism is arranged on the ground surface, is electrically connected with the processor and is used for winding the other end of the connecting rope; the supporting frame is fixedly connected to the inner wall of the monitoring well, the supporting frame is located above the NAPL layer, a range finder is installed on the supporting frame and used for measuring the distance between the supporting frame and the upper surface of the NAPL layer, a telescopic rod is arranged on the supporting frame in a penetrating mode, and the lower end of the telescopic rod is connected with a pressure sensor. According to the utility model, the underground water density and the NAPL phase density can be monitored in real time by utilizing a drainage method, so that the calculation precision of the NAPL layer thickness is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrological monitoring, in particular to a groundwater real-time monitoring well. Background Art

[0002] In areas severely contaminated by petroleum hydrocarbons, they migrate downward through cracks in the soil. Because petroleum hydrocarbons are immiscible with water, they accumulate above the groundwater, forming a non-aqueous liquid (NAPL) layer that floats on the surface. As the groundwater flows, portions of the NAPL layer migrate with it, contaminating a wider area of ​​soil and groundwater. Currently, the most effective treatment is to extract the NAPL layer. However, during the extraction process, the NAPL in the monitoring wells is quickly depleted. Because the petroleum hydrocarbons around the monitoring wells migrate slowly, they are unable to reach the wells in time, causing the extraction equipment to extract groundwater. Excessive groundwater extraction not only increases wastewater treatment capacity but also lowers the water level, further contaminating the soil. Therefore, during the extraction process, it is necessary to monitor the thickness of the NAPL layer in the groundwater monitoring wells in real time to inform extraction strategies.

[0003] Patent Publication No. CN221666894U discloses a device for measuring the thickness of the NAPL layer in a groundwater monitoring well. The bottom end of a distance rod extends through the NAPL layer into a position in the groundwater. A pressure sensor measures the pressure at that position, and a distance meter measures the length of the distance rod above the NAPL layer. The total length of the distance rod extending into the NAPL layer and the groundwater is obtained based on the length of the distance rod and the length of the distance rod above the NAPL layer. The thickness of the NAPL layer is then obtained based on the density of the groundwater, the density of the NAPL phase, the pressure, the length of the distance rod, and the total length of the distance rod extending into the NAPL layer and the groundwater. This device can monitor the thickness of the NAPL layer in real time, providing data support for starting or shutting down the extraction equipment.

[0004] Under normal circumstances, groundwater is in a state of flux, and the density of groundwater in monitoring wells fluctuates. However, the above measurement process ignores this change in groundwater density, leading to deviations in the calculated data. Furthermore, precisely because groundwater is in a state of flux, the density of the NAPL phase also fluctuates, leading to calculation errors in the NAPL density. These factors lead to errors in the NAPL layer thickness measured by existing techniques.

[0005] In view of this, how to monitor groundwater density and NAPL phase density in real time, thereby improving the calculation accuracy of NAPL layer thickness, has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] The utility model aims to provide a groundwater real-time monitoring well to overcome the above-mentioned shortcomings.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is:

[0008] A groundwater real-time monitoring well, comprising:

[0009] monitoring wells;

[0010] a monitoring and analysis module, comprising a processor, and an electronic dynamometer, a distance meter, and a pressure sensor electrically connected to the processor;

[0011] A movable pulley connected to the electronic dynamometer, the electronic dynamometer being used to measure the force applied to the movable pulley, a connecting rope being wound around the movable pulley, one end of the connecting rope being located in the monitoring well and connected to a density ball;

[0012] a hoisting mechanism disposed on the ground and electrically connected to the processor, the hoisting mechanism being used to reel in the other end of the connecting rope; and

[0013] A support frame is fixedly connected to the inner wall of the monitoring well, and the support frame is located above the NAPL layer. The rangefinder is installed on the support frame, and the rangefinder is used to measure the distance between the support frame and the upper surface of the NAPL layer. A telescopic rod is provided through the support frame, and the lower end of the telescopic rod is connected to the pressure sensor, and the pressure sensor is located below the lowest annual groundwater level.

[0014] Furthermore, it also includes a support platform installed on the ground, the processor, electronic dynamometer and winch mechanism are all installed on the support platform, the movable pulley is located above the monitoring well, and the support platform is also rotatably connected to a fixed pulley, which is located below the movable pulley. The middle part of the connecting rope is sequentially wound around the movable pulley and the fixed pulley, and the intersection point of the middle part of the connecting rope and the movable pulley is located on the horizontal radial extension line of the movable pulley. The electronic dynamometer is used to measure the downward force applied to the movable pulley.

[0015] Furthermore, the support frame includes:

[0016] The outer ring plate is fixedly connected to the inner wall of the monitoring well;

[0017] An inner ring plate is located on the inner side of the outer ring plate and is coaxially arranged. The telescopic rod is penetrated by the inner ring plate. A connecting plate is provided between the inner ring plate and the outer ring plate. The inner ring plate, the connecting plate and the outer ring plate are integrally formed. The rangefinder is installed on the connecting plate.

[0018] Furthermore, the outer ring plate is provided with a mounting hole running through it in a horizontal direction, and an expansion bolt is provided in the mounting hole. The outer ring plate is fixedly connected to the inner wall of the monitoring well through the expansion bolt.

[0019] Furthermore, the telescopic rod includes multiple connecting rods, and the multiple connecting rods are detachably connected in sequence along the vertical direction.

[0020] Furthermore, the lower end of the lowermost connecting rod is detachably connected to the pressure sensor, and the outer side wall of the uppermost connecting rod is provided with an external thread section, which passes through the inner ring plate, and the external thread section is threadedly connected to two nuts, which are respectively located on the upper and lower sides of the inner ring plate.

[0021] Furthermore, the monitoring and analysis module further includes a communication module electrically connected to the processor, and the communication module is mounted on the support platform;

[0022] The hoisting mechanism includes a reduction motor installed on the support platform and a hoisting disc transmission-connected to the reduction motor. The reduction motor is electrically connected to the processor, and the hoisting disc is wound with the other end of the connecting rope.

[0023] Furthermore, the rangefinder is a laser rangefinder.

[0024] Compared with the prior art, the present invention has at least the following advantages:

[0025] The utility model suspends a density ball by connecting a rope so that the density ball is located in the water layer and the NAPL layer. The buoyancy of the density ball can be calculated by an electronic dynamometer and its own gravity, and then the density of the surrounding liquid when the density ball is in the water layer and the NAPL layer can be converted respectively.

[0026] The utility model can monitor the groundwater density and the NAPL phase density in real time by using the drainage method, thereby improving the calculation accuracy of the NAPL layer thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of the utility model groundwater real-time monitoring well;

[0029] Figure 2 This is a schematic diagram of the assembly of the support frame, rangefinder, telescopic rod and pressure sensor of the utility model;

[0030] Figure 3 This is an exploded view of the support frame, rangefinder, telescopic rod and pressure sensor of the utility model.

[0031] Figure numerals: 1. Monitoring well; 2. Processor; 3. Electronic dynamometer; 4. Distance meter; 5. Pressure sensor; 6. Movable pulley; 7. Fixed pulley; 8. Connecting rope; 9. Reducer motor; 10. Winch; 11. Support frame; 12. Telescopic rod; 13. Support platform; 14. Nut; 15. Communication module; 1101. Outer ring plate; 1102. Connecting plate; 1103. Inner ring plate; 1104. Expansion bolt. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0034] Reference Figure 1-3 The present invention provides a real-time groundwater monitoring well, comprising a monitoring well 1, a monitoring and analysis module, a movable pulley 6, a connecting rope 8, a hoisting mechanism, a support frame 11, and a telescopic rod 12. The monitoring and analysis module includes a processor 2, an electronic dynamometer 3, a rangefinder 4, and a pressure sensor 5 electrically connected to the processor 2. The movable pulley 6 is connected to the electronic dynamometer 3, which is used to measure the force applied to the movable pulley 6. A connecting rope 8 is wound around the movable pulley 6. One end of the connecting rope 8 is located within the monitoring well 1 and is connected to a density ball having a density greater than that of water. A hoisting mechanism is located on the ground surface and electrically connected to the processor 2. The hoisting mechanism is connected to the other end of the connecting rope 8 and is used to reel it in. The support frame 11 is fixedly connected to the inner wall of the monitoring well 1, positioned above the NAPL layer. A rangefinder 4, a laser rangefinder, is mounted on the support frame 11 and is used to measure the distance between the support frame 11 and the upper surface of the NAPL layer. A telescopic rod 12 is provided through the support frame 11 , and a pressure sensor 5 is connected to the lower end of the telescopic rod 12 . The pressure sensor 5 is located below the lowest water level of the groundwater throughout the year.

[0035] In addition, the present invention is further provided with a support platform 13 , which is installed on the ground surface. The processor 2 , the electronic dynamometer 3 and the hoisting mechanism are all installed on the support platform 13 .

[0036] The movable pulley 6 is located above the monitoring well 1. The support platform 13 is also rotatably connected to the fixed pulley 7, which is located below the movable pulley 6. The middle part of the connecting rope 8 is sequentially wound around the movable pulley 6 and the fixed pulley 7, and the tangent point between the middle part of the connecting rope 8 and the movable pulley 6 is located on the horizontal radial extension line of the movable pulley 6. The electronic dynamometer 3 is used to measure the downward force applied to the movable pulley 6.

[0037] The middle part of the connecting rope 8 is in a vertical state before and after it passes around the fixed pulley 7. The electronic dynamometer 3 applies a vertical upward force to the movable pulley 6 to measure the downward force on the movable pulley 6.

[0038] The support frame 11 includes an outer ring plate 1101 fixedly connected to the inner wall of the monitoring well 1, an inner ring plate 1103 located on the inner side of the outer ring plate 1101 and coaxially arranged therewith, and a connecting plate 1102 for connecting the outer ring plate 1101 and the inner ring plate 1103. The inner ring plate 1103 is penetrated by a telescopic rod 12, and the connecting plate 1102 is arranged between the inner ring plate 1103 and the outer ring plate 1101. The inner ring plate 1103, the connecting plate 1102 and the outer ring plate 1101 are integrally formed, and a rangefinder 4 is installed on the connecting plate 1102.

[0039] The outer ring plate 1101 is provided with a mounting hole in the horizontal direction. An expansion bolt 1104 is provided in the mounting hole. The outer ring plate 1101 is fixedly connected to the inner wall of the monitoring well 1 through the expansion bolt 1104 .

[0040] The telescopic rod 12 includes a plurality of connecting rods, which are detachably connected in sequence along the vertical direction.

[0041] The lower end of the lowermost connecting rod is detachably connected to the pressure sensor 5. The outer wall of the uppermost connecting rod is provided with an externally threaded section that extends through the inner ring plate 1103 and is threadedly connected to two nuts 14, one on the upper and lower sides of the inner ring plate 1103. This secures the outer ring plate 1101.

[0042] The monitoring and analysis module further includes a communication module 15 electrically connected to the processor 2 . The communication module 15 is installed on the support platform 13 . The measured data can be transmitted to the background processor 2 through the communication module 15 .

[0043] The hoisting mechanism includes a reduction motor 9 mounted on a support platform 13 and a hoisting disc 10 connected to the reduction motor 9 in a transmission manner. The reduction motor 9 is electrically connected to the processor 2 , and the hoisting disc 10 is wound with the other end of the connecting rope 8 .

[0044] The working principle of this utility model:

[0045] The length of the telescopic rod 12 is adjusted to ensure that it can penetrate the NAPL layer and extend into a certain position in the groundwater. This position is the monitoring point, and the length L of the telescopic rod 12 below the support frame 11 and the distance L1 between the rangefinder 4 and the support frame 11 and the upper surface of the NAPL layer are recorded. The pressure sensor 52 monitors the pressure P at this monitoring point.

[0046] By rotating the winch mechanism, the length of the connecting rope 8 below the support frame 11 is L. At this time, the density ball and the pressure sensor 5 are at the same height. The volume of the density ball is known to be V and the mass is m. The reading of the electronic dynamometer 3 at this time is recorded as F1. By rotating the winch mechanism, one end of the connecting rope 8 is slowly lifted up. When the reading of the electronic dynamometer 3 stabilizes after changing, it should be ensured that the length of the connecting rope 8 below the support frame 11 is greater than L1, indicating that the density ball is in the NAPL layer. The reading of the electronic dynamometer 3 at this time is recorded as F2.

[0047] The calculation process of NAPL layer thickness is as follows:

[0048] P = g × (L oil × ρ oil + L water × ρ water)

[0049] L-L1=L oil + L water

[0050] F1 / 2+ρwater×g×V=m×g

[0051] F2 / 2+ρoil×g×V=m×g

[0052] Where P is the pressure at the monitoring point, g = 9.8 N / kg, ρwater is the density of groundwater, ρoil is the density of the NAPL phase, L is the length of the distance rod, and Loil is the thickness of the NAPL layer. The above equations are combined to obtain:

[0053] L oil = [2PV + (F1 - 2mg)(L - L1)] / (F2 - F1).

[0054] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0055] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A groundwater real-time monitoring well, characterized in that: include: Monitoring well (1); A monitoring and analysis module comprises a processor (2), and an electronic dynamometer (3), a distance meter (4), and a pressure sensor (5) electrically connected to the processor (2); a movable pulley (6) connected to the electronic dynamometer (3), the electronic dynamometer (3) being used to measure the force applied to the movable pulley (6); a connecting rope (8) being wound around the movable pulley (6); one end of the connecting rope (8) being located in the monitoring well (1) and connected to a density ball; a hoisting mechanism disposed on the ground and electrically connected to the processor (2), the hoisting mechanism being used to reel in the other end of the connecting rope (8); as well as A support frame (11) is fixedly connected to the inner wall of the monitoring well (1), the support frame (11) is located above the NAPL layer, the rangefinder (4) is installed on the support frame (11), the rangefinder (4) is used to measure the distance between the support frame (11) and the upper surface of the NAPL layer, the support frame (11) is provided with a telescopic rod (12) running through it, the lower end of the telescopic rod (12) is connected to the pressure sensor (5), and the pressure sensor (5) is located below the lowest perennial groundwater level.

2. The groundwater real-time monitoring well according to claim 1, characterized in that: The invention also includes a support platform (13) installed on the ground, the processor (2), the electronic dynamometer (3) and the hoisting mechanism are all installed on the support platform (13), the movable pulley (6) is located above the monitoring well (1), and the support platform (13) is also rotatably connected to a fixed pulley (7), and the fixed pulley (7) is located below the movable pulley (6). The middle part of the connecting rope (8) is sequentially wound around the movable pulley (6) and the fixed pulley (7), and the tangent point between the middle part of the connecting rope (8) and the movable pulley (6) is located on the horizontal radial extension line of the movable pulley (6). The electronic dynamometer (3) is used to measure the downward force on the movable pulley (6).

3. The groundwater real-time monitoring well according to claim 1, characterized in that: The support frame (11) comprises: An outer ring plate (1101) fixedly connected to the inner wall of the monitoring well (1); An inner ring plate (1103) is located on the inner side of the outer ring plate (1101) and is coaxially arranged. The telescopic rod (12) is provided through the inner ring plate (1103). A connecting plate (1102) is provided between the inner ring plate (1103) and the outer ring plate (1101). The inner ring plate (1103), the connecting plate (1102) and the outer ring plate (1101) are integrally formed. The distance meter (4) is mounted on the connecting plate (1102).

4. The groundwater real-time monitoring well according to claim 3, characterized in that: The outer ring plate (1101) is provided with a mounting hole extending through it in the horizontal direction, and an expansion bolt (1104) is provided in the mounting hole. The outer ring plate (1101) is fixedly connected to the inner wall of the monitoring well (1) via the expansion bolt (1104).

5. The groundwater real-time monitoring well according to claim 4, characterized in that: The telescopic rod (12) comprises a plurality of connecting rod sections, and the plurality of connecting rod sections are detachably connected in sequence along a vertical direction.

6. The groundwater real-time monitoring well according to claim 5, characterized in that: The lower end of the lowermost connecting rod is detachably connected to the pressure sensor (5), and the outer side wall of the uppermost connecting rod is provided with an external thread section, which passes through the inner ring plate (1103). The external thread section is threadedly connected to two nuts (14), and the two nuts (14) are respectively located on the upper and lower sides of the inner ring plate (1103).

7. The groundwater real-time monitoring well according to claim 2, characterized in that: The monitoring and analysis module further includes a communication module (15) electrically connected to the processor (2), and the communication module is installed on the support platform (13); The hoisting mechanism comprises a reduction motor (9) mounted on the support platform (13) and a hoisting disc (10) connected to the reduction motor (9) in a transmission manner. The reduction motor (9) is electrically connected to the processor (2), and the hoisting disc (10) is wound with the other end of the connecting rope (8).

8. The groundwater real-time monitoring well according to claim 1, characterized in that: The rangefinder (4) is a laser rangefinder (4).

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