Underground water flow velocity monitoring device based on fluorescence tracing principle

Abstract

The utility model relates to an underground water flow velocity monitoring device based on a fluorescence tracing principle, which comprises an underground detection assembly and a ground signal acquisition control assembly, the underground detection assembly is electrically connected with the ground signal acquisition control assembly through a cable, and the underground detection assembly comprises an upper shell and a lower shell. The upper shell is connected with the upper end of the lower shell through a plurality of vertical connecting rods, a scale tray is fixed among the plurality of vertical connecting rods, a plurality of fluorescent tracing balls are contained in the scale tray, and a monitoring assembly for shooting and collecting the motion trail of the fluorescent tracing balls in the scale tray below is arranged in the upper shell. The device has the advantages that the device calculates the flow direction and the flow velocity of underground water by directly capturing the position imaging change of the fluorescent tracer ball in the underground water in the test well, so that accurate and efficient monitoring is realized; the device is simple and convenient to operate, only needs to monitor the test well, does not need to additionally arrange a monitoring well, is low in engineering cost, and basically has no pollution to underground water because only the surface of the fluorescent tracer ball is coated with trace fluorescent substances.

Description

Technical Field

[0001] This utility model belongs to the field of groundwater flow velocity monitoring, specifically relating to a groundwater flow velocity monitoring device based on the principle of fluorescence tracing. Background Technology

[0002] Groundwater, which resides in the pores of rocks below the surface, is more complex to monitor than surface water resources. However, changes in the quality and quantity of groundwater, and the resulting alterations in its environment and transport patterns, can have a significant impact on the ecological environment. Measuring the flow velocity and direction of groundwater can provide accurate reference data for geological exploration and engineering construction, and can also enable the monitoring of the transport patterns of polluted water bodies, thereby achieving macroscopic prediction and management of water resources.

[0003] Currently, the main methods for monitoring groundwater flow velocity and direction include pumping tests, potentiometric methods, and tracer methods. Pumping tests require setting up three pumping wells at equal intervals around the original groundwater well. The flow direction is calculated by measuring the water level in each well, and then the flow velocity is calculated using Darcy's law. This method involves a large construction area, high engineering costs, a long testing cycle, and the final results often deviate significantly from actual conditions. The potentiometric method uses a network of equidistant electrodes to inversely determine groundwater flow velocity and direction characteristics by measuring changes in resistivity. This method requires high geological homogeneity, involves a large construction area, has complex electrode setup, and is difficult to control and analyze sudden changes in resistivity. The tracer method involves adding a tracer substance to the groundwater well and monitoring changes in the tracer substance's content in surrounding monitoring wells to determine groundwater migration. This method requires additional monitoring wells, has high engineering costs, and the results often have significant deviations. The safety and environmental friendliness of the tracer substance are also questionable. Utility Model Content

[0004] This invention provides a groundwater flow velocity monitoring device based on the principle of fluorescence tracing, aiming to overcome, to some extent, the aforementioned deficiencies in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A groundwater flow velocity monitoring device based on the principle of fluorescence tracer, which includes a downhole detection component and a surface signal acquisition and control component. The downhole detection component and the surface signal acquisition and control component are electrically connected by a cable. The downhole detection component includes an upper shell and a lower shell. The upper shell is connected to the upper end of the lower shell through multiple vertical connecting rods spaced apart in the lower circumferential direction. A scale tray is fixed between the multiple vertical connecting rods. Multiple fluorescent tracer balls are contained in the scale tray. A monitoring component is provided in the upper shell to capture the movement trajectory of the fluorescent tracer balls in the scale tray below. A liftable protective sleeve is provided between the upper shell and the lower shell. When the protective sleeve is lowered to the lowest point, a closed space is formed between the upper shell and the lower shell, covering the scale tray and the fluorescent tracer balls.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the wellhead signal acquisition and control component includes an image information acquisition and processing module, a communication module, a controller, and a power supply.

[0008] Furthermore, the wellhead signal acquisition and control component also includes a cable reel for winding up and unwinding the cable.

[0009] Furthermore, the monitoring component includes a signal transceiver circuit board, a pinhole camera, a microscope lens, an LED light, an electronic compass, and a transparent glass arranged sequentially from top to bottom inside the upper housing, with the transparent glass fixedly disposed in the lower opening of the upper housing.

[0010] Furthermore, the lower housing is equipped with a water pressure sensor, a temperature sensor, and a counterweight.

[0011] Furthermore, the protective sleeve is raised and lowered by a lifting drive assembly, which is electrically connected to the controller via the cable.

[0012] Furthermore, the lifting drive assembly includes a pull rope, a coiling wheel, and a drive motor. One end of the pull rope is fixed to the coiling wheel, and the other end is fixedly connected to the upper end face of the protective sleeve. The drive motor drives the coiling wheel to rotate. An annular groove is provided inside the shell wall of the upper housing, and the protective sleeve moves up and down in the annular groove.

[0013] Furthermore, the lifting drive assembly includes a drive motor, a gear, and a rack. The rack is arranged axially along the upper housing and fixedly connected to the outer wall of the protective sleeve. The gear meshes with the rack, and the drive motor drives the gear to rotate.

[0014] Furthermore, the fluorescent tracer ball is a foam ball or a hollow plastic ball with a surface coated with a fluorescent agent.

[0015] Furthermore, both the upper and lower shells are made of stainless steel.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The groundwater flow velocity monitoring device based on the principle of fluorescence tracing provided by this utility model calculates the groundwater flow direction and velocity by directly capturing the positional changes of the fluorescent tracer ball in the groundwater within the test well, thus achieving accurate and efficient monitoring. The device is easy to operate, requiring only monitoring of the test well, without the need to set up additional monitoring wells, resulting in low engineering costs. The fluorescent tracer ball is only coated with a small amount of fluorescent material on its surface, causing virtually no pollution to the groundwater. Attached Figure Description

[0018] Figure 1 A schematic diagram illustrating the usage status of a groundwater flow velocity monitoring device based on the principle of fluorescence tracing provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows a downhole detection component in a groundwater flow velocity monitoring device based on the principle of fluorescence tracing.

[0020] Figure 3 This is a schematic diagram of the lifting drive assembly of the protective sleeve of a groundwater flow velocity monitoring device based on the principle of fluorescence tracing.

[0021] Figure 4 This is a schematic diagram of another lifting drive component for the protective sleeve of a groundwater flow velocity monitoring device based on the principle of fluorescence tracing. The lifting drive component includes a drive motor, gears, and racks.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Cable; 2. Upper housing; 3. Lower housing; 4. Vertical connecting rod; 5. Scale tray; 6. Fluorescent tracer ball; 7. Protective sleeve; 8. Image information acquisition and processing module; 9. Communication module; 10. Controller; 11. Power supply; 12. Cable reel; 13. Signal transceiver circuit board; 14. Pinhole camera; 15. Microscope lens; 16. LED light; 17. Electronic compass; 18. Transparent glass; 19. Water pressure sensor; 20. Temperature sensor; 21. Counterweight; 22. Pull rope; 23. Drive motor; 24. Coil wheel; 25. Gear; 26. Rack. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0025] In the description of this utility model, if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" are used to indicate the orientation or positional relationship, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] like Figures 1 to 4 As shown, this utility model provides a groundwater flow velocity monitoring device based on the principle of fluorescence tracing, which includes a downhole detection component and a surface signal acquisition and control component. The downhole detection component and the surface signal acquisition and control component are electrically connected by a cable 1. The downhole detection component includes an upper housing 2 and a lower housing 3. The upper housing 2 is connected to the upper end of the lower housing 3 by multiple vertical connecting rods 4 spaced apart on the lower circumference. A scale tray 5 is fixed between the multiple vertical connecting rods 4. Multiple fluorescent tracer balls 6 are contained in the scale tray 5. A monitoring component is provided in the upper housing 2 to capture the movement trajectory of the fluorescent tracer balls 6 in the scale tray 5 below. A liftable protective sleeve 7 is provided between the upper housing 2 and the lower housing 3. When the protective sleeve 7 is lowered to the lowest point, a closed space is formed between the upper housing 2 and the lower housing 3, covering the scale tray 5 and the fluorescent tracer balls 6.

[0027] It should be noted that the number of fluorescent tracer balls in the scale tray should not be too small, and the initial lifting speed of the protective sleeve should be controlled to prevent all the fluorescent tracer balls from being washed away by the initial water flow when the protective sleeve is lifted underwater. When there are many fluorescent tracer balls, although the initial water flow into the enclosed space will have some impact on the fluorescent tracer balls and carry away some, the impact on the fluorescent tracer balls will quickly stabilize because the flow velocity of groundwater is generally not high. At this time, the fluorescent tracer balls that are still within the shooting range of the monitoring component can be photographed and recorded, thereby obtaining the flow velocity and direction of the groundwater. The protective sleeve can prevent the water flow from washing away all the fluorescent tracer balls on the scale tray during the underwater placement process, ensuring that the fluorescent tracer balls only come into contact with the water flow after reaching the designated depth.

[0028] In one embodiment of this utility model, such as Figure 1 As shown, the wellhead signal acquisition and control component includes an image information acquisition and processing module 8, a communication module 9, a controller 10, and a power supply 11. The controller can be a touchscreen.

[0029] In one embodiment of the present invention, the well surface signal acquisition and control component further includes a reel 12 for winding and unwinding the cable 1.

[0030] In one embodiment of the present invention, the monitoring component includes a signal transceiver circuit board 13, a pinhole camera 14, a microscope lens 15, an LED light 16, an electronic compass 17, and a transparent glass 18 arranged sequentially from top to bottom inside the upper housing 2. The transparent glass 18 is fixedly disposed in the lower opening of the upper housing 2.

[0031] It should be noted that the illumination from the LED light excites the fluorescent material on the fluorescent tracer sphere, ensuring clearer and more accurate monitoring of the sphere's movement trajectory when photographing in the dark environment of an underground well. Based on the positional changes of the fluorescent microspheres, the flow velocity and direction of the groundwater can be calculated. To ensure that the scale lines on the scale tray can be identified and photographed, a transparent glass can be installed on the top of the lower housing, and an LED light specifically designed to illuminate the bottom of the scale tray can be installed inside the lower housing. The scale tray is a light-transmitting tray with scale lines. Alternatively, the scale tray can also be configured as a tray with electrically illuminated scale lines.

[0032] In one embodiment of this utility model, the lower housing 3 is provided with a water pressure sensor 19, a temperature sensor 20 and a counterweight 21.

[0033] It should be noted that the counterweight ensures that the center of gravity of the entire downhole detection assembly is located at a lower position, thereby ensuring a better vertical position and better monitoring results.

[0034] In one embodiment of the present invention, the protective sleeve 7 is driven to rise and fall by a lifting drive assembly, and the lifting drive assembly is electrically connected to the controller 10 through the cable 1.

[0035] Understandably, the lifting drive assembly can be remotely controlled from the ground via a controller to raise or lower the protective sleeve.

[0036] In one embodiment of this utility model, such as Figure 3 As shown, the lifting drive assembly includes a pull rope 22, a coiling wheel 24, and a drive motor 23. One end of the pull rope 22 is coiled and fixed on the coiling wheel 24, and the other end is fixedly connected to the upper end face of the protective sleeve 7. The drive motor 23 drives the coiling wheel 24 to rotate. An annular groove is provided in the shell wall of the upper housing 2, and the protective sleeve 7 moves up and down in the annular groove.

[0037] In one embodiment of the present invention, the lifting drive assembly includes a drive motor 23, a gear 25 and a rack 26. The rack 26 is arranged along the axial direction of the upper housing 2 and is fixedly connected to the outer wall of the protective sleeve 7. The gear 25 meshes with the rack 26, and the drive motor 23 drives the gear 25 to rotate.

[0038] It should be noted that the aforementioned drive motor can be fixed to the outside or inside of the upper housing, depending on the specific circumstances. In order to better drive the protective sleeve to rise and fall, at least two lifting drive components can be set and arranged opposite each other, so that the protective sleeve will not tilt or fall when subjected to force.

[0039] In one embodiment of this utility model, the fluorescent tracer ball 6 is a foam ball or a hollow plastic ball with a surface coated with a fluorescent agent.

[0040] In one embodiment of this utility model, both the upper shell 2 and the lower shell 3 are made of stainless steel.

[0041] The method of using the groundwater flow velocity monitoring device based on the fluorescence tracing principle provided by this utility model is briefly described as follows:

[0042] The downhole monitoring component is brought to the specified depth of the test well by releasing the cable through the cable reel. The pressure sensor and temperature sensor on the lower housing transmit the groundwater pressure and temperature to the image information acquisition and processing module through the cable.

[0043] Then, the controller sends a start signal to the lifting component, which slowly moves the protective sleeve upward. The scale tray holding the fluorescent tracer ball diffuses under the action of the groundwater dynamic flow. After stabilization, the monitoring component in the lower shell is activated to collect images of the fluorescent tracer ball migrating with the changes in the groundwater flow field.

[0044] By using a pinhole camera in the monitoring component to continuously capture the trajectory of a fluorescent tracer ball under a microscope, the flow direction characteristics of groundwater can be preliminarily determined. By comparing the position and orientation of the fluorescent tracer ball in different images (combined with information from an electronic compass and a scale tray), the mathematical formula for particle movement is converted into the formula to calculate the groundwater flow velocity.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A groundwater flow velocity monitoring device based on the principle of fluorescence tracing, characterized in that, The device includes a downhole detection component and a surface signal acquisition and control component. The downhole detection component and the surface signal acquisition and control component are electrically connected by a cable (1). The downhole detection component includes an upper housing (2) and a lower housing (3). The upper housing (2) is connected to the upper end of the lower housing (3) by multiple vertical connecting rods (4) spaced apart in the lower circumference. A scale tray (5) is fixed between the multiple vertical connecting rods (4). Multiple fluorescent tracer balls (6) are contained in the scale tray (5). A monitoring component is provided in the upper housing (2) to capture the movement trajectory of the fluorescent tracer balls (6) in the scale tray (5) below. A liftable protective sleeve (7) is provided between the upper housing (2) and the lower housing (3). When the protective sleeve (7) is lowered to the lowest point, a closed space is formed between the upper housing (2) and the lower housing (3) that covers the scale tray (5) and the fluorescent tracer balls (6).

2. The groundwater flow velocity monitoring device based on the fluorescence tracing principle according to claim 1, characterized in that, The wellhead signal acquisition and control component includes an image information acquisition and processing module (8), a communication module (9), a controller (10), and a power supply (11).

3. The groundwater flow velocity monitoring device based on the principle of fluorescence tracing according to claim 2, characterized in that, The wellhead signal acquisition and control assembly also includes a reel (12) for winding up and unwinding the cable (1).

4. The groundwater flow velocity monitoring device based on the fluorescence tracing principle according to claim 2, characterized in that, The monitoring components include a signal transceiver circuit board (13), a pinhole camera (14), a microscope lens (15), an LED light (16), an electronic compass (17), and a transparent glass (18) arranged sequentially from top to bottom inside the upper housing (2). The transparent glass (18) is fixedly installed in the lower opening of the upper housing (2).

5. The groundwater flow velocity monitoring device based on the fluorescence tracing principle according to claim 1, characterized in that, The lower housing (3) is equipped with a water pressure sensor (19), a temperature sensor (20), and a counterweight (21).

6. The groundwater flow velocity monitoring device based on the fluorescence tracing principle according to claim 2, characterized in that, The protective sleeve (7) is driven to rise and fall by a lifting drive assembly, which is electrically connected to the controller (10) via the cable (1).

7. A groundwater flow velocity monitoring device based on the principle of fluorescence tracing according to claim 6, characterized in that, The lifting drive assembly includes a pull rope (22), a coiling wheel (24), and a drive motor (23). One end of the pull rope (22) is coiled and fixed on the coiling wheel (24), and the other end is fixedly connected to the upper end face of the protective sleeve (7). The drive motor (23) drives the coiling wheel (24) to rotate. The upper housing (2) has an annular groove in its shell wall, and the protective sleeve (7) moves up and down in the annular groove.

8. A groundwater flow velocity monitoring device based on the principle of fluorescence tracing according to claim 6, characterized in that, The lifting drive assembly includes a drive motor (23), a gear (25) and a rack (26). The rack (26) is arranged along the axial direction of the upper housing (2) and is fixedly connected to the outer wall of the protective sleeve (7). The gear (25) meshes with the rack (26), and the drive motor (23) drives the gear (25) to rotate.

9. A groundwater flow velocity monitoring device based on the principle of fluorescence tracing according to any one of claims 1 to 8, characterized in that, The fluorescent tracer ball (6) is a foam ball or a hollow plastic ball with a fluorescent agent coated on its surface.

10. A groundwater flow velocity monitoring device based on the principle of fluorescence tracing according to any one of claims 1 to 8, characterized in that, Both the upper shell (2) and the lower shell (3) are made of stainless steel.

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