Groundwater level monitoring device

Abstract

This application provides a groundwater level monitoring device, including a connecting pipe, a water-proof pipe, and an inlet pipe. The connecting pipe has multiple connecting segments detachably connected along its length. The water-proof pipe includes a pipe body, a medium injection pipe, and a bladder disposed on the outer peripheral wall of the pipe body. The medium injection pipe is at least partially disposed within the pipe body, passes through the pipe body, and communicates with the bladder. The pipe body is detachably connected to the connecting pipe. The inlet pipe is connected to the end of the pipe body away from the connecting pipe. The inlet pipe has a through hole. The water-proof pipe can separate the target aquifer from other aquifers, reducing the interference of other aquifers on the target aquifer. The connecting pipe includes multiple connecting segments detachably connected along its length. An appropriate number of connecting segments can be selected according to the depth of the target aquifer, thereby adapting to the detection of aquifers in different areas.

Description

Technical Field

[0001] This application relates to the field of groundwater observation technology, and in particular to a groundwater level observation device. Background Technology

[0002] In geotechnical engineering investigations, it is necessary to determine the groundwater level of the aquifers in the site. When there is only one aquifer, the groundwater level can be measured directly in the borehole. When there are multiple aquifers, there are three commonly used methods for groundwater level measurement. The first method involves using a hammer to drive a casing into the strata during drilling. The casing is tightly fitted against the aquitard to prevent the flow of groundwater between different aquifers. After the groundwater level stabilizes, it is measured inside the casing. The second method involves lowering a water level observation tube into the borehole. Clay balls are filled between the observation tube and the borehole wall to prevent the flow of groundwater between different aquifers. After the groundwater level stabilizes, it is measured inside the observation tube. The third method involves burying a pore water pressure gauge in the borehole. Clay balls are filled at the top of the target aquifer to prevent the flow of groundwater between different aquifers. After the groundwater level stabilizes, readings are taken and the groundwater level is calculated.

[0003] Because the target aquifer depth varies in different regions, and the groundwater monitoring devices in related technologies are difficult to detect aquifers in different regions, their flexibility is relatively low. Utility Model Content

[0004] This application provides a groundwater level observation device that can solve the technical problem that groundwater observation devices in related technologies have relatively low flexibility and are difficult to detect aquifers in different areas.

[0005] In a first aspect, embodiments of this application provide a groundwater level monitoring device, comprising: A connecting pipe, comprising a plurality of connecting segments detachably connected along the length of the connecting pipe; A water-proof pipe includes a pipe body, a medium injection pipe, and a bladder disposed on the outer peripheral wall of the pipe body. The medium injection pipe is at least partially disposed in the pipe body, passes through the pipe body, and communicates with the bladder. The pipe body and the connecting pipe are detachably connected. A water inlet pipe is connected to the end of the pipe body away from the connecting pipe, and a through hole is provided on the water inlet pipe.

[0006] In some embodiments, the tube body includes two first tube segments and a second tube segment connected between the two first tube segments. The outer diameter of the first tube segment is larger than the outer diameter of the second tube segment, and the two first tube segments and the second tube segment form a limiting interval on the outer periphery of the second tube segment. The bladder is installed in the limiting interval and abuts against the first tube segment.

[0007] In some embodiments, at least one of the first pipe segments is provided with an internal thread, and the connecting pipe is provided with an external thread that mates with the internal thread, wherein the internal thread does not extend to the second pipe segment.

[0008] In some embodiments, one of the first pipe segments is threadedly connected to the inlet pipe.

[0009] In some embodiments, the medium injection tube includes a first tube segment and a second tube segment that are perpendicular to each other, the second tube segment passing through the tube body and communicating with the capsule, and the first tube segment extending along the length direction of the tube body.

[0010] In some embodiments, the first tube segment has two opposite ends along its length, both of which are located outside the tube.

[0011] In some embodiments, the through hole includes a first through hole and a plurality of second through holes disposed on the side wall of the water inlet pipe, wherein the first through hole is disposed at the end of the water inlet pipe away from the pipe body.

[0012] In some embodiments, the surface of the through-hole is provided with a filter screen.

[0013] In some embodiments, a water level measuring mechanism is also included, which includes a water level sensor, a control box, and an electrical connection wire. The water level sensor is located inside the water inlet pipe. The plurality of connecting sections include a first connecting section at the end away from the water separator pipe. The control box is connected to the outer wall of the first connecting section. The electrical connection wire is electrically connected to the control box and the water level sensor.

[0014] In some embodiments, the plurality of connecting segments include a first connecting segment at the end away from the riser pipe, the first connecting segment being connected to a support frame for installation on the ground.

[0015] The groundwater level observation device based on the embodiments of this application includes a connecting pipe, a water-proof pipe, and a water inlet pipe. The water-proof pipe can separate the target aquifer from other aquifers, reducing the interference of other aquifers on the target aquifer. The connecting pipe includes multiple connecting segments that can be detachably connected along the length of the connecting pipe. An appropriate number of connecting segments can be selected according to the depth of the target aquifer, thereby adapting to the detection of aquifers in different areas. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the groundwater level monitoring device provided in the embodiments of this application; Figure 2 yes Figure 1 An enlarged schematic diagram of the structure at point A in the shown structure; Figure 3 This is a schematic diagram of the structure of the connection segment provided in an embodiment of this application; Figure 4 This is a schematic diagram of the tube structure provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the riser provided in the embodiments of this application; Figure 6 This is a cross-sectional structural diagram of the water-proof pipe provided in the embodiments of this application; Figure 7 This is a schematic diagram of the structure of the water inlet pipe provided in the embodiment of this application.

[0017] Explanation of reference numerals in the attached figures: 10. Connecting pipe; 11. Connecting section; 20. Waterproof pipe; 21. Pipe body; 21a. Limiting zone; 211. First pipe section; 212. Second pipe section; 212a. Connecting hole; 22. Medium injection pipe; 221. First pipe body section; 2211. End; 222. Second pipe body section; 23. Bladder body; 23a. Bladder cavity; 30. Water inlet pipe; 31. Through hole; 31a. First through hole; 31b. Second through hole; 40. Water level measuring mechanism; 41. Control box; 42. Electrical connection cable; 50. Support frame; 100. Medium connecting pipe; Detailed Implementation The technical solutions in this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more than two.

[0018] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0019] In geotechnical engineering investigations, it is necessary to determine the groundwater level of the aquifers in the site. When there is only one aquifer, the groundwater level can be measured directly in the borehole. When there are multiple aquifers, there are three commonly used methods for groundwater level measurement. The first method involves using a hammer to drive a casing into the strata during drilling. The casing is tightly fitted against the aquitard to prevent the flow of groundwater between different aquifers. After the groundwater level stabilizes, it is measured inside the casing. The second method involves lowering a water level observation tube into the borehole. Clay balls are filled between the observation tube and the borehole wall to prevent the flow of groundwater between different aquifers. After the groundwater level stabilizes, it is measured inside the observation tube. The third method involves burying a pore water pressure gauge in the borehole. Clay balls are filled at the top of the target aquifer to prevent the flow of groundwater between different aquifers. After the groundwater level stabilizes, readings are taken and the groundwater level is calculated.

[0020] Because the target aquifer depth varies in different regions, and the groundwater monitoring devices in related technologies are difficult to detect aquifers in different regions, their flexibility is relatively low.

[0021] To resolve the above technical issues, please refer to [link / reference]. Figure 1 and Figure 2 This application provides a groundwater level monitoring device, including a connecting pipe 10, a water-proof pipe 20, and a water inlet pipe 30.

[0022] Specifically, the connecting pipe 10 includes a plurality of connecting segments 11 that are detachably connected along the length of the connecting pipe 10. The water-proof pipe 20 includes a pipe body 21, a medium injection pipe 22, and a bladder 23 disposed on the outer peripheral wall of the pipe body 21. The medium injection pipe 22 is at least partially disposed inside the pipe body 21, passes through the pipe body 21, and communicates with the bladder 23. The pipe body 21 is detachably connected to the connecting pipe 10. The water inlet pipe 30 is connected to the end of the pipe body 21 away from the connecting pipe 10. A through hole 31 is provided on the water inlet pipe 30.

[0023] In this embodiment of the application, the groundwater level monitoring device follows these steps: Drill a hole to the predetermined depth, depending on the exploration depth and the location of the target aquifer. Based on the depth of the target aquifer, assemble an appropriate number of connecting sections 11, connect the bottom to the inlet pipe 30, and lower them into the borehole. Ensure that the inlet pipe 30 is directly facing the target aquifer, while the riser pipe 20 is located above the target aquifer to achieve physical isolation between the target aquifer and other aquifers above it.

[0024] More specifically, in this embodiment of the application, the water inlet pipe 30 is the part that is in direct contact with the target aquifer, and a through hole 31 is provided on it to allow groundwater to flow freely into the device.

[0025] After the riser 20 injects a high-pressure medium (such as water or gas) into the bladder 23 through the medium injection pipe 22, the bladder 23 expands radially like a balloon and eventually presses tightly against the borehole wall to form a permanent or semi-permanent and very reliable sealing ring.

[0026] The sealing ring completely isolates the target aquifer located below from other aquifers or non-target sections above, eliminating hydraulic communication (crosstalk) between different water layers, thus ensuring that the monitored water level data comes from the target aquifer and guaranteeing the accuracy of the data.

[0027] Among them, the bladder 23 is an expandable sealed bag installed on the outer wall of the tube 21, and its material is generally supported by flexible materials such as high-strength rubber.

[0028] like Figure 3 As shown, the multiple connecting sections 11 in the connecting pipe 10 adopt a modular design, which can be easily connected or disassembled section by section. This allows the groundwater level monitoring device in this embodiment to flexibly adapt to different monitoring depths by increasing or decreasing the number of connecting sections 11. It eliminates the need to customize complete sets of equipment of different lengths, greatly enhancing the flexibility and versatility of the equipment.

[0029] It should be understood that, in this embodiment of the application, a water level measuring mechanism 40 is used to measure the water level of the target aquifer. Please refer to... Figure 2 Specifically, the water level measuring mechanism 40 includes a water level sensor, a control box 41, and an electrical connection line 42. The water level sensor is located inside the water inlet pipe 30. The multiple connecting sections 11 include a first connecting section at the end away from the water separator pipe 20. The control box 41 is connected to the outer wall of the first connecting section. The electrical connection line 42 is electrically connected to the control box 41 and the water level sensor.

[0030] In practical use, the first connection section is located outside the borehole. In this way, the data detected by the water level sensor can be transmitted to the control box 41. The control box 41 can integrate a main unit, a battery, and a display screen. The main unit and the display screen are both electrically connected to the battery, and the main unit can also be electrically connected to the display screen, so that the data can be directly displayed on the display screen so that the user can directly read the water level data. The above electrical connection relationships are all mature connection relationships, and will not be described in detail here.

[0031] As described above, the connecting pipe 10, the water-proof pipe 20, and the water-inlet pipe 30 are suspended in the borehole. To ensure that the connecting pipe 10 remains vertical at all times, please refer to the following embodiment in this application. Figure 2 The plurality of connecting sections 11 include a first connecting section at the end away from the riser pipe 20, on which a support frame 50 for ground installation is connected.

[0032] The support frame 50 can provide an installation foundation for the connecting pipe 10, the water-proof pipe 20, and the water inlet pipe 30, ensuring stability. In addition, since the water level sensor is generally required to detect the water level after the water inlet pipe 30 enters the target aquifer and remains stationary for a period of time during the observation process, the support frame 50 can ensure the stability of the water inlet pipe 30 in the target aquifer without the need for other large equipment such as hoisting equipment.

[0033] The support frame 50 provides a stable suspension point for the connecting pipe 10, preventing it from tilting, bending or sinking, and ensuring that it is always in a vertical state. This avoids friction or jamming between the water level sensor and the pipe wall, and ensures the continuity and accuracy of the monitoring data.

[0034] In one embodiment of this application, please refer to Figure 4 and Figure 5 The tube body 21 includes a first tube segment 211 and a second tube segment 212 connected between the two first tube segments 211. The outer diameter of the first tube segment 211 is larger than the outer diameter of the second tube segment 212, and the two first tube segments 211 and the second tube segment 212 form a limiting interval 21a on the outer periphery of the second tube segment 212. The bladder body 23 is installed in the limiting interval 21a and abuts against the first tube segment 211.

[0035] The limiting range 21a formed by the tube 21 prevents the bladder 23 from shifting axially (up and down) or slipping under high pressure, firmly confining the bladder 23 within the designed range and ensuring that its expansion direction is as radially outward as possible, thereby accurately sealing the target position.

[0036] Furthermore, by setting the limiting interval 21a, the installation position of the bladder 23 is determined, which can greatly improve the installation efficiency when installing the water-proof pipe 20.

[0037] In the first embodiment, the capsule 23 itself can form a capsule cavity 23a, and the capsule 23 has a hole so that the medium injection tube 22 can communicate with the capsule cavity 23a. In this embodiment, the medium injection tube 22 passes through the communication hole 212a on the second tube segment 212 and then communicates with the hole on the capsule 23. In the second embodiment, the capsule 23 and the side wall of the second tube segment 212 can form a capsule cavity 23a, and the medium injection tube 22 can directly communicate with the capsule cavity 23a by passing through the communication hole 212a on the second tube segment 212. The second embodiment is preferred in this application.

[0038] It should be understood that, in the embodiments of this application, the installation of the bladder 23 and the tube 21 can be as follows: the two ends of the bladder 23 usually have extended flanges or pressure edges. During factory assembly, the bladder 23 is fitted, and then the flanges at both ends are folded over and pressed tightly onto the end faces of the two first tube segments 211. Alternatively, a special high-strength adhesive can be applied to the end face of the first tube segment 211, and then the flanges of the bladder 23 can be pasted onto it. Finally, pressure rings or straps may be used for mechanical reinforcement. Of course, the connection between the bladder 23 and the tube 21 can also adopt other fixing methods in the prior art, which will not be explained in detail here.

[0039] In some embodiments, please refer to Figure 6 The medium injection tube 22 includes a first tube section 221 and a second tube section 222 that are perpendicular to each other. The second tube section 222 passes through the tube 21 and communicates with the capsule 23. The first tube section 221 extends along the length of the tube 21.

[0040] The first pipe section 221 and the second pipe section 222 can be connected by a tee pipe, or the first pipe section 221 and the second pipe section 222 can be welded together. The first pipe section 221 extends along the length of the pipe body 21, which facilitates the connection of the external medium connecting pipe 100 to the first pipe section 221. The specific connection method can be a flange connection, a grooved connection, a threaded plug, or other detachable connection methods, which will not be explained here.

[0041] Following the above, the first tube segment 221 has two opposite ends 2211 along its length direction, and both ends 2211 are located outside the tube 21.

[0042] When the first pipe section 221 has two opposing ends 2211, the connection between the connecting pipe 10 and the water-proof pipe 20 will not affect the connection between the water-proof pipe 20 and the connecting pipe 10, regardless of which end of the first pipe section 221 is connected to the external medium communication pipe 100, thereby improving the installation efficiency. In addition, if the first pipe section 221 is blocked, it can be cleared from the other end.

[0043] It should be understood that when assembling the connecting pipe 10 and the water-proof pipe 20, the external medium connecting pipe 100 needs to pass through both ends of the connecting pipe 10 first, so that the medium connecting pipe 100 and the medium injection pipe 22 are connected. Then the connecting pipe 10 and the water-proof pipe 20 are assembled together. In order to facilitate the connection between the medium connecting pipe 100 and the medium injection pipe 22, in this embodiment of the application, the end 2211 of the first pipe body segment 221 is located outside the pipe body 21. Thus, the medium injection pipe 22 and the medium connecting pipe 100 are implemented outside the water-proof pipe 20, thereby improving the convenience of connecting the medium injection pipe 22 and the medium connecting pipe 100.

[0044] It should also be understood that, since the medium connecting pipe 100 is only connected to one end 2211 of the first pipe section 221 when the groundwater level monitoring device is in use, the other end 2211 can be sealed with a plug when in use.

[0045] Considering that the medium injection pipe 22 is connected to the external medium communication pipe 100, in order to facilitate the connection between the medium injection pipe 22 and the medium communication pipe 100, the pipe body 21 of the water-proof pipe 20 and the connecting pipe 10 are detachably connected. Specifically, at least one first pipe section 211 is provided with an internal thread, and the connecting pipe 10 is provided with an external thread that mates with the internal thread.

[0046] In some embodiments, both first pipe sections 211 may be provided with internal threads, so that when connecting the water-proof pipe 20 and the connecting pipe 10, it is not necessary to adjust the orientation of the two ends of the water-proof pipe 20, thereby realizing the quick connection between the connecting pipe 10 and the water-proof pipe 20.

[0047] Furthermore, since the first pipe section 211 has a larger wall thickness than the second pipe section 212, when the internal thread does not extend to the second pipe section 212, the high-strength connecting thread is only set on the first pipe section 211 with a larger wall thickness. This avoids the strength reduction caused by machining threads on the thin-walled second pipe section 212, thereby ensuring the connection strength between the connecting pipe 10 and the water-proof pipe 20.

[0048] Similarly, in order to make the water inlet pipe 30 a standard module that can be quickly replaced, one of the first pipe sections 211 is threadedly connected to the water inlet pipe 30. The first pipe section 211 can be provided with external or internal threads. When both first pipe sections 211 are provided with internal threads, the water inlet pipe 30 is provided with external threads.

[0049] That is, depending on the characteristics of different aquifers (such as particle size), the length of the inlet pipe 30 can be selected or the diameter of the through hole 31 can be different.

[0050] It is also important to understand that, considering the water from the target aquifer will flow into the inlet pipe 30, in order to prevent sand and gravel from entering the inlet pipe 30 (i.e., to prevent sand inrush and blockage), to protect the sensor, and to prevent the density of the water containing a large amount of suspended sediment from changing and causing distortion of the pressure measurement value, thus leading to an incorrect water level calculation, a filter screen (not shown in the figure) is provided on the surface of the through hole 31. The filter screen can be made of stainless steel.

[0051] In some possible embodiments, the filter screen may include a main filter screen and a protective screen. A main filter screen (typically stainless steel wire mesh, nylon mesh, or polyester mesh) is tightly wound around the outside of the inlet pipe 30 with through holes 31. This screen primarily serves a filtering function.

[0052] Outside the main filter screen, an additional protective mesh is wrapped (usually a thicker stainless steel wire mesh with larger openings). This layer does not primarily serve a filtering function, but rather protects the internal main filter screen from direct impact and abrasion by ground sand and gravel, and also helps to distribute water pressure.

[0053] Finally, secure both ends of the wound filter assembly with metal clamps (or "clamps" or "rings") to keep them relatively fixed.

[0054] In the embodiments of this application, such as Figure 7 As shown, the through hole 31 includes a first through hole 31a and a plurality of second through holes 31b provided on the side wall of the water inlet pipe 30. The presence of a large number of second through holes 31b on the side wall can greatly increase the surface area for water to enter. This means that under the same water level conditions, more water can flow in more quickly, improving the response speed of the equipment.

[0055] Multiple second through holes 31b located on the side allow water to flow evenly from all directions, avoiding the suction vortex that may be formed by a single inlet, thereby reducing the possibility of sediment entering the inlet pipe 30.

[0056] The first through hole 31a at the bottom helps to expel air from the pipe 21 during the device lowering process, preventing air blockage and allowing water to enter smoothly. When the groundwater level drops very low, even below the second through hole 31b on the side wall, the first through hole 31a at the bottom ensures that the device can still contact the water body and will not lose its monitoring capability, thus expanding the effective monitoring range of the equipment.

[0057] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A groundwater level monitoring device, characterized in that, include: A connecting pipe, comprising a plurality of connecting segments detachably connected along the length of the connecting pipe; A water-proof pipe includes a pipe body, a medium injection pipe, and a bladder disposed on the outer peripheral wall of the pipe body. The medium injection pipe is at least partially disposed in the pipe body, passes through the pipe body, and communicates with the bladder. The pipe body and the connecting pipe are detachably connected. A water inlet pipe is connected to the end of the pipe body away from the connecting pipe, and a through hole is provided on the water inlet pipe.

2. The groundwater level monitoring device according to claim 1, characterized in that, The tube body includes two first tube segments and a second tube segment connected between the two first tube segments. The outer diameter of the first tube segment is larger than the outer diameter of the second tube segment, and the two first tube segments and the second tube segment form a limiting interval on the outer periphery of the second tube segment. The bladder is installed in the limiting interval and abuts against the first tube segment.

3. The groundwater level monitoring device according to claim 2, characterized in that, At least one of the first pipe sections is provided with an internal thread, and the connecting pipe is provided with an external thread that mates with the internal thread, wherein the internal thread does not extend to the second pipe section.

4. The groundwater level monitoring device according to claim 2, characterized in that, One of the first pipe sections is threadedly connected to the water inlet pipe.

5. The groundwater level monitoring device according to claim 1, characterized in that, The medium injection tube includes a first tube segment and a second tube segment that are perpendicular to each other. The second tube segment passes through the tube and communicates with the capsule. The first tube segment extends along the length of the tube.

6. The groundwater level monitoring device according to claim 5, characterized in that, The first tube segment has two opposite ends along its length, both of which are located outside the tube.

7. The groundwater level monitoring device according to claim 1, characterized in that, The through hole includes a first through hole and a plurality of second through holes provided on the side wall of the water inlet pipe, wherein the first through hole is provided at the end of the water inlet pipe away from the pipe body.

8. The groundwater level monitoring device according to claim 1, characterized in that, The surface of the through hole is provided with a filter screen.

9. The groundwater level monitoring device according to claim 1, characterized in that, It also includes a water level measuring mechanism, which includes a water level sensor, a control box, and an electrical connection wire. The water level sensor is located inside the water inlet pipe. The plurality of connecting sections include a first connecting section at the end away from the water separator pipe. The control box is connected to the outer wall of the first connecting section. The electrical connection wire is electrically connected to the control box and the water level sensor.

10. The groundwater level monitoring device according to claim 1, characterized in that, The plurality of connecting sections include a first connecting section at the end away from the water-proof pipe, on which a support frame for installation on the ground is connected.

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