A groundwater level monitoring device

Abstract

The groundwater level monitoring device comprises a crossbeam fixed in a well, two groups of winding assemblies arranged side by side on the crossbeam, a winding roller, a steel rope wound on the winding roller, a driven gear fixed on the winding roller, an underwater laser range finder and a float connected to free ends of the steel ropes of the two groups of winding assemblies, a clutch driving assembly arranged on the crossbeam, a long tube fixed on an inner wall of the well, the axis of the long tube arranged vertically, the float arranged in the long tube, a common laser range finder fixed on the crossbeam for measuring the position of the float, two flip covers symmetrically arranged at the upper end of the well, and an opening and closing cover assembly arranged in the well for opening and closing the flip covers. The device can be opened by the opening and closing cover assembly, facilitating maintenance, and the float can be wrapped by the long tube, avoiding disturbance of the float by underground water flow.

Description

Technical Field

[0001] This invention belongs to the technical field of water level monitoring equipment, and specifically relates to a groundwater level monitoring device. Background Technology

[0002] Real-time monitoring of groundwater level characteristics is a crucial hydrological monitoring activity, which is of great significance for water resource management, agricultural irrigation, environmental protection, disaster early warning, and construction and infrastructure.

[0003] Patent CN218937498U discloses a patent entitled "Groundwater Level Monitoring Device", which uses a pressure sensor to detect the depth of groundwater. The probe is lowered into the water by a rope winding mechanism to obtain pressure feedback values ​​at different water depths. The pressure feedback values ​​can be used to determine the changes in groundwater depth.

[0004] However, the flow of groundwater disturbs the probe, seriously affecting the accuracy of the measurement; in addition, the rope winding mechanism is completely placed inside the box, and the box needs to be opened for maintenance. The box of this patent is fixed by bolts or rivets, so it is not conducive to frequent disassembly, maintenance and inspection. Summary of the Invention

[0005] The present invention provides a groundwater level monitoring device, which addresses the technical problem of how to facilitate maintenance and avoid disturbance to the probe caused by groundwater flow.

[0006] This invention discloses a groundwater level monitoring device, comprising a crossbeam fixed in a well, two sets of winding assemblies arranged side-by-side on the crossbeam; each winding assembly includes a winding roller rotatably connected to the crossbeam; a steel rope is wound on the winding roller; a driven gear is fixed on the winding roller, the axis of the driven gear coinciding with the axis of the winding roller; the free ends of the steel ropes of the two winding assemblies are respectively connected to an underwater laser rangefinder and a float; a clutch drive assembly is provided on the crossbeam for driving the two winding assemblies to operate respectively; a long pipe is fixed on the inner wall of the well, the axis of the long pipe is vertically arranged, the float is located in the long pipe, and the lower end of the long pipe extends into the groundwater; a conventional laser rangefinder for measuring the position of the float is fixed on the crossbeam, the conventional laser rangefinder being directly above the float; two flip covers are symmetrically arranged at the upper end of the well, and the monitoring device also includes an opening and closing cover assembly for opening and closing the flip covers, the opening and closing cover assembly being disposed in the well.

[0007] Furthermore, a support frame is provided in the well, and the support frame is fixed to the inner wall of the well; a motor is fixed on the support frame, and the motor shaft is connected to a drive sprocket through a reducer; a fixed crossbar is fixed in the well, and a driven sprocket is rotatably connected to the fixed crossbar; a chain is sleeved on the drive sprocket and the driven sprocket, and the chain meshes with the drive sprocket and the driven sprocket; the chain is arranged vertically; a connecting block is fixed on the chain; two sets of opening and closing cover assemblies are symmetrically arranged, and the opening and closing cover assembly includes a support rod, one end of which is rotatably connected to the connecting block through a shaft one, and the other end of which is rotatably connected to a hinge seat through a shaft two; a slider is fixedly connected to the hinge seat, and the slider is movably locked onto the flip cover; the monitoring device also includes an outer frame support frame, which is fixed to the outer wall of the well edge, and the flip cover is rotatably connected to the well edge through a hinge; the shafts of shaft one, shaft two and the hinge are parallel.

[0008] When equipment maintenance is required, the motor causes the chain to rotate vertically, moving the connecting block upwards. This causes the upper ends of the two support rods to open, shafts one and two to rotate, and the slider moves relative to the guide rail. Simultaneously, the cover rotates via the hinges, causing the opposite sides of the two covers to open, thus completing the opening process. Conversely, when maintenance is not required, the motor reverses, moving the connecting block downwards, causing the opposite sides of the covers to close, ultimately resulting in a fully closed cover when it is horizontal. Therefore, compared to the patent CN218937498U, which discloses a groundwater level monitoring device, this application's solution provides greater access to the internal components of the monitoring device, facilitating maintenance of the well's internal parts. It also makes it easier to remove the underwater laser rangefinder from the well.

[0009] Furthermore, the long pipe includes several casings and several mounting brackets, each mounting bracket being fixed to the inner wall of the well; the mounting brackets are arranged in a one-to-one correspondence with the casings, and the mounting brackets are fixed to the outer wall of the corresponding casings, with each casing being spliced ​​together.

[0010] Because the long pipe is composed of interconnected sleeves, the purpose of this design is to protect the float within it. This ensures that the radial flow of groundwater only scours the outer wall of the long pipe, preventing it from eroding the float inside and thus preventing it from swaying unnecessarily. However, by designing the long pipe as interconnected sleeves, when the lower end of the long pipe is insufficient to reach below the groundwater level, the distance between the lower end of the long pipe and the groundwater can be extended by appropriately connecting the sleeves, ensuring that the lower end of the long pipe definitely extends below the groundwater level.

[0011] Furthermore, the lower end of the float is connected to a counterweight via a steel rope.

[0012] The counterweight is connected to the lower end of the float. This not only increases the overall weight of the float and the counterweight, increasing the system inertia of the entire float and counterweight, making the float less likely to sway on the water surface, but also lowers the center of gravity of the float and the counterweight, making the float more stable on the water surface.

[0013] Furthermore, the clutch drive assembly includes a lever positioned between two sets of winding assemblies. The lever is vertically oriented, with its lower end rotatably connected to a crossbeam. A drive gear is rotatably connected to the lever, and a coupling is rotatably connected to the lever. The coupling is fixedly connected to the drive gear, and the axis of the coupling coincides with the axis of the drive gear. A hand drill is located at the end of the coupling away from the drive gear, and the shaft of the hand drill is fixedly connected to the coupling. By rotating the lever, the drive gear meshes with one of the driven gears.

[0014] By moving the lever in two directions, the driving gear on the lever can be manually engaged with one of the driven gears, thus manually driving one of the winding components. This demonstrates the flexibility to control the descent of the float or the underwater laser rangefinder. When reeling in the underwater laser rangefinder alone, the float will not interfere with the rangefinder.

[0015] Beneficial effects:

[0016] 1. It is equipped with an opening and closing cover assembly, which allows the cover to be opened, so that operators can inspect and maintain the equipment in the well. The opening and closing cover assembly makes maintenance convenient. 2. By using an underwater laser rangefinder to replace the pressure sensor in the existing technology, the underwater laser rangefinder is more accurate than the pressure sensor, thus improving the accuracy of the measurement.

[0017] 3. A long pipe is installed to enclose the float, so that the water flow in the groundwater cannot disturb the float. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the device; Figure 2 This is a structural diagram of the opening and closing cover assembly and other components; Figure 3 This is to show a structural diagram of the motor and chain; Figure 4 This is a structural diagram of the support rod and the cover body in the opening and closing cover assembly; Figure 5 This is to show a structural diagram of a common laser rangefinder, float, and sleeve; Figure 6 This is to highlight the positional relationship between the lever and the winding roller.

[0019] Figure 7This is a schematic diagram of the connection structure of the buoy, underwater laser rangefinder, and steel cable.

[0020] 1. Bracket; 2. Motor; 3. Drive sprocket; 4. Fixed crossbar; 5. Well; 6. Driven sprocket; 7. Chain; 8. Connecting block; 9. Outer frame support frame; 10. Flip cover; 101. Cover body; 102. Connecting body; 11. Support rod; 12. Hinge seat; 13. Slider; 14. Guide rail; 15. Hinge; 16. Crossbeam; 17. Winding roller; 18. Driven gear; 19. Steel rope; 20. Lever; 21. Drive gear; 22. Coupling; 23. Hand drill; 24. Underwater laser rangefinder; 25. Buoy; 26. Casing; 27. Mounting bracket; 28. Ordinary laser rangefinder; 29. ​​Counterweight. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] See Figure 1 and Figure 3 A groundwater level monitoring device includes a support 1. In this embodiment, the support 1 is an H-shaped support. The support 1 is fixed on the inner wall of the well 5, and its lower end is connected to the groundwater. The end face of the well 5 is circular.

[0023] See Figure 2 A motor 2 is mounted on a bracket 1. The non-rotating shaft end of the motor 2 is fixed to the bracket 1. The rotating shaft end of the motor 2 is connected to the input end of a reducer. A drive sprocket 3 is fixedly connected to the output end of the reducer. In this embodiment, combined with... Figure 3 The axis of the drive sprocket 3 is set horizontally, that is, the axis of the drive sprocket 3 is along... Figure 2 It is positioned in the left-right direction. A fixed horizontal bar 4 is also fixed to the inner wall of well 5. The fixed horizontal bar 4 is horizontally positioned to... Figure 2 See, the left and right ends of the fixed crossbar 4 are fixed to the inner wall of the well 5. A driven sprocket 6 (see...) is rotatably connected to the fixed crossbar 4. Figure 5 The driven sprocket 6's axis of rotation coincides with the axis of the fixed crossbar 4. The driven sprocket 6 is positioned above the driving sprocket 3, and the axis of the driven sprocket 6 is parallel to the axis of the driving sprocket 3, lying in the same vertical plane. Figure 2 In the left-right direction. A chain 7 is mounted on both the driving sprocket 3 and the driven sprocket 6, and the chain 7 meshes with both the driving sprocket 3 and the driven sprocket 6.

[0024] See Figure 2Chain 7 is vertically positioned. Under the action of motor 2, chain 7 rotates vertically. A connecting block 8 is fixedly connected to chain 7. The vertical portion of chain 7 consists of two sections, each running vertically... Figure 2 The connecting blocks are arranged in parallel perpendicular to the plane of the paper. In this embodiment, the connecting block 8 is fixed on the rear chain 7. The connecting block 8 can move vertically under the action of the motor 2. The connecting block 8 does not affect the engagement of the chain 7 with the driving sprocket 3 or the driven sprocket 6.

[0025] See Figure 2 The monitoring device also includes an outer frame support frame 9. The upper end of the well 5 protrudes from the ground, forming a circular well rim on the ground. The axis of the well rim is vertically oriented. The outer frame support frame 9 is a rectangular frame; in this embodiment, it is a square frame. The outer frame support frame 9 is fitted onto the well rim, and its axis coincides with the axis of the well rim. The outer frame support frame 9 is fixedly connected to the outer edge of the well rim by expansion bolts. Spatially, the fixed crossbar 4 is positioned above the outer frame support frame 9.

[0026] See Figure 2 Two flip covers 10 are rotatably connected to the outer frame support 9. The flip covers 10 are located at the upper end of the well edge, and the two flip covers 10 are along... Figure 2 The flip cover 10 is symmetrically arranged in the left-right direction. It includes an integrally formed cover body 101 and a connecting body 102. The connecting body 102 is connected to the outer frame support frame 9 via a hinge 15. The rotation axis of the hinge 15 is perpendicular to... Figure 2 Paper orientation.

[0027] Two opening and closing cover assemblies are provided between the connecting block 8 and the flip cover 10 for opening or closing the flip cover 10. The two opening and closing cover assemblies are along... Figure 2 The two opening and closing cover components are symmetrically arranged in the left and right directions, and the axis of symmetry of the two opening and closing cover components coincides with the axis of symmetry of the two flip covers 10.

[0028] See Figure 2 and Figure 4 The opening and closing cover assembly includes a support rod 11, the lower end of which is rotatably connected to the connecting block 8 via a shaft 1. The axis of the shaft 1 is perpendicular to the axis of the connecting block 8. Figure 2 Paper orientation. The upper end of support rod 11 is rotatably connected to hinge seat 12 via shaft two, and the axis of rotation of shaft two is perpendicular to... Figure 2 Paper orientation. A slider 13 is fixedly connected to the hinge seat 12; a guide rail 14 is provided on the lower surface wall of the cover 101, and the slider 13 is movably engaged on the guide rail 14. The slider 13 can move along the guide rail 14, and the sliding direction is always parallel to the paper orientation. Figure 2 Paper.

[0029] Motor 2 causes chain 7 to rotate vertically and connecting block 8 to move upward. This causes the upper ends of the two support rods 11 to open, shafts 1 and 2 to rotate, and slider 13 to move relative to guide rail 14. Simultaneously, cover 101 rotates via hinge 15, causing opposite sides of the two covers 101 to open, thus completing the opening process. Conversely, when motor 2 reverses direction, causing connecting block 8 to move downward, opposite sides of cover 101 close, ultimately completing the closing process when cover 101 is in a horizontal position. After closing, the projection of cover 101 on the horizontal plane completely covers the edge of well 5. The forward and reverse rotation of motor 2 is manually controlled by the operator.

[0030] The monitoring device also includes a crossbeam 16, to Figure 2 See, the left and right ends of the crossbeam 16 are fixed to the inner wall of the well 5, and the crossbeam 16 is located below the outer frame support 9. A slot is provided in the middle of the crossbeam 16. Figure 2 (Not shown in the image), the slot extends vertically through the crossbeam 16. Two sets of winding assemblies are installed in the slot, and the two sets of winding assemblies extend vertically through the crossbeam 16. Figure 2 The two winding assemblies are arranged side by side perpendicular to the paper surface. The two sets of winding assemblies are designated as the first winding assembly and the second winding assembly, respectively, and are identical.

[0031] See Figure 6 The winding assembly includes a winding roller 17, the left end of which is rotatably connected to the inner wall of the slot, and the axis of the winding roller 17 is along... Figure 2 In the left-right direction. A driven gear 18 is fixed to the right end of the winding roller 17, and the axis of the driven gear 18 coincides with the axis of the winding roller 17. A steel rope 19 is wound on the winding roller 17, and the free end of the steel rope 19 extends downward through the slot.

[0032] See Figure 6 A clutch drive assembly is provided between the front and rear winding assemblies. The clutch drive assembly includes a lever 20, which is vertically positioned. The lower end of the lever 20 is rotatably connected to the inner wall of the slot by a shaft three. The axis of rotation of the shaft three is along... Figure 2 The lever 20 has a hole in its middle, which extends through the lever 20 in the front-to-back direction. A drive gear 21 is rotatably connected to the lever 20, and the drive gear 21 is located in the hole on the lever 20. The axis of the drive gear 21 is along the left-to-right direction. Figure 2 The lever 20 can rotate around the shaft three under human force, and can be moved forward or backward. The driving gear 21 on the lever 20 can mesh with one of the driven gears 18. Without human force, the lever 20 cannot rotate freely due to the large friction at the shaft three.

[0033] See Figure 6 A coupling 22 is rotatably connected to the lever 20, and the axis of the coupling 22 is along... Figure 2In the left-right direction, the axis of coupling 22 coincides with the axis of drive gear 21. The left end of coupling 22 is fixedly connected to drive gear 21, and the right end of coupling 22 is equipped with a hand drill 23. The non-rotating end of hand drill 23 is suspended, and the rotating shaft of hand drill 23 is fixedly connected to the right end of coupling 22. Only when the operator holds hand drill 23 and starts hand drill 23 can drive gear 21 rotate under the power of the rotating shaft of hand drill 23. The operator holds the upper end of lever 20, causing lever 20 to rotate around shaft 3, so that drive gear 21 meshes with one of driven gears 18; during this process, since hand drill 23 is not connected to other parts, but only to drive gear 21 through coupling 22, hand drill 23 rotates with the rotation of lever 20.

[0034] See Figure 7 First winding assembly ( Figure 2 The free end of the steel rope 19 of the winding assembly (front side) is fixedly connected to (attached to) an underwater laser rangefinder 24. Due to the high friction of the winding roller 17, the weight of the underwater laser rangefinder 24 will not drive the winding roller 17 to rotate. It is necessary for the drive gear 21 and the driven gear 18 to mesh, and for the hand drill 23 to drive the winding roller 17 to rotate, thereby causing the underwater laser rangefinder 24 to wind up and down. The second winding assembly ( Figure 2 The free end of the steel rope 19 of the winding assembly on the middle and rear sides is fixedly connected to a float 25. Similarly, under the weight of the float 25, the winding roller 17 cannot rotate at will. It must be driven by the hand drill gun 23 to rotate the winding roller 17 after the drive gear 21 meshes with the driven gear 18, and the float 25 is wound up and down.

[0035] See Figure 5 To avoid disturbing the float 25 due to groundwater flow, multiple mounting brackets 27 are fixed on the inner wall of well 5. Each mounting bracket 27 has several sections of sleeve 26. The axis of each sleeve 26 is set vertically. The sleeves 26 are spliced ​​together to form a complete long pipe. Each mounting bracket 27 is set one-to-one with each sleeve 26. Each mounting bracket 27 is fitted onto each sleeve 26. The end of the mounting bracket 27 facing the sleeve 26 is annular, and its inner diameter is slightly smaller than the diameter of the sleeve 26. Therefore, the end of the mounting bracket 27 facing the sleeve 26 is fixedly connected to the sleeve 26 by interference fit. The lower end of the spliced ​​long pipe extends below the groundwater surface.

[0036] The steel rope 19 connected to the aforementioned float 25 extends in a direction parallel to the axis of the long pipe. The float 25 is located inside the long pipe, and the groundwater flows radially along the long pipe but is blocked by the long pipe. Therefore, the water flow cannot disturb the float 25 inside the long pipe, thus preventing the float 25 from swaying due to the water flow.

[0037] See Figure 5A conventional laser rangefinder 28 is fixedly connected to the crossbeam 16. The conventional laser rangefinder 28 is located directly above the float 25. The laser emitted by the conventional laser rangefinder 28 shines downwards onto the float 25 and is reflected, so the distance S1 between the conventional laser rangefinder 28 and the float 25 can be calculated.

[0038] See Figure 7 In order to reduce the swaying of the float 25 on the groundwater surface, a counterweight 29 is fixed to the lower end of the float 25 by a steel rope 19, which increases the inertia of the float 25. The scouring of the groundwater on the float 25 makes the floating displacement (vertical displacement) of the float 25 not too large.

[0039] The operation process is as follows: The operator moves the lever forward, engaging the drive gear with the driven gear on the front. The hand drill moves with the lever, activating the drill in the forward direction. Since the operator holds the drill, it is stationary. The coupling rotates relative to the crossbeam under the power of the drill's shaft. Because the coupling is fixedly connected to the drive gear, it drives the drive gear to rotate. The drive gear, engaged with the driven gear, rotates relative to the crossbeam. The driven gear, fixedly connected to the winding roller, rotates relative to the crossbeam, unwinding the steel rope and lowering its free end. The underwater laser rangefinder, located at the free end of the rope, descends. When the lower end of the rangefinder just touches the water surface, the drill stops. The lower end of the underwater laser rangefinder emits a laser beam underwater, which is reflected back to the rangefinder from the bottom, allowing the measurement of the groundwater depth S1.

[0040] Then the operator reverses the direction of the drill gun, moving in the same direction as described above, to raise the underwater laser rangefinder. Once it reaches a suitable height, the underwater laser rangefinder is removed from the steel cable and retrieved. Because underwater laser rangefinders are relatively expensive, timely retrieval is necessary to avoid damage.

[0041] Move the lever to engage the drive gear with the driven gear on the rear. Through the aforementioned action, the hand drill gun lowers the float. The float continues to descend in the long tube until it has a low density and floats on the surface of the groundwater, while the counterweight is below the surface of the groundwater.

[0042] A standard laser rangefinder emits a laser beam downwards onto a buoy. The beam is reflected back to the rangefinder, which measures the distance S2 between itself and the buoy. Subsequently, the rangefinder is used periodically to monitor this distance S2. Assuming S2 is 15 meters and the depth S1 is 5 meters, after the first cycle, if S2 is measured again as 16 meters, then the groundwater depth S1 after the first cycle should be 5 meters - (16 meters - 15 meters) = 4 meters. This process continues, by measuring the groundwater depth S1 once with an underwater laser rangefinder and then using multiple measurements of S2 with the standard laser rangefinder, the change in groundwater depth can be calculated.

[0043] When equipment maintenance is required, motor 2 causes chain 7 to rotate vertically, and connecting block 8 to move upward. This causes the upper ends of the two support rods 11 to open, shafts one and two to rotate, and slider 13 to move relative to each other along guide rail 14. Simultaneously, cover 101 rotates via hinge 15, and the opposite sides of the two covers 101 begin to open, thus completing the opening process. Conversely, when equipment maintenance is not required, motor 2 reverses, causing connecting block 8 to move downward. The opposite sides of the covers 101 then close, and finally, when the covers 101 are in a horizontal position, the entire closing process is complete.

[0044] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A groundwater level monitoring device, characterized in that, Includes a crossbeam fixed in the well, on which two sets of winding assemblies are provided, with the two sets of winding assemblies arranged side by side; The winding assembly includes a winding roller, which is rotatably connected to a crossbeam; a steel rope is wound on the winding roller; a driven gear is fixed on the winding roller, and the axis of the driven gear coincides with the axis of the winding roller; the free ends of the steel ropes of the two winding assemblies are respectively connected to an underwater laser rangefinder and a float. The crossbeam is equipped with a clutch drive assembly for driving the two winding assemblies respectively. A long pipe is fixed to the inner wall of the well, with its axis vertically aligned. The float is located inside the long pipe, and the lower end of the long pipe extends into the groundwater. A conventional laser rangefinder for measuring the position of the float is fixed to the crossbeam, positioned directly above the float. Two flip covers are symmetrically arranged at the upper end of the well. The monitoring device also includes an opening and closing cover assembly for opening and closing the flip covers, which is located inside the well. A support is installed inside the well, fixed to the inner wall. A motor is fixed to the support, and the motor's shaft is connected to a drive sprocket via a reducer. A fixed crossbar is fixed inside the well. A driven sprocket is rotatably connected to a fixed crossbar. A chain is fitted onto the driving sprocket and the driven sprocket, and the chain meshes with the driving sprocket and the driven sprocket. The chain is arranged vertically. A connecting block is fixed on the chain. Two sets of opening and closing cover assemblies are symmetrically arranged. The opening and closing cover assembly includes a support rod. One end of the support rod is rotatably connected to the connecting block through a shaft one. The other end of the support rod is rotatably connected to a hinge seat through a shaft two. A slider is fixedly connected to the hinge seat. The slider is movably locked onto the flip cover. The monitoring device also includes an outer frame support frame, which is fixed to the outer wall of the well edge. The flip cover is rotatably connected to the well edge through a hinge. The rotation axes of shaft one, shaft two and the hinge are parallel.

2. The groundwater level monitoring device according to claim 1, characterized in that, The long pipe includes several casings and several mounting brackets, each mounting bracket being fixed to the inner wall of the well; the mounting brackets are set one-to-one with the casings, and the mounting brackets are fixed to the outer wall of the corresponding casings, with each casing being spliced ​​together.

3. The groundwater level monitoring device according to claim 1, characterized in that, The lower end of the float is connected to a counterweight via a steel cable.

4. The groundwater level monitoring device according to claim 1, characterized in that, The clutch drive assembly includes a lever positioned between two sets of winding assemblies. The lever is vertically oriented, with its lower end rotatably connected to a crossbeam. A drive gear is rotatably connected to the lever, and a coupling is rotatably connected to the lever. The coupling is fixedly connected to the drive gear, and the axis of the coupling coincides with the axis of the drive gear. A hand drill is located at the end of the coupling away from the drive gear, and the shaft of the hand drill is fixedly connected to the coupling. By rotating the lever, the drive gear meshes with one of the driven gears.

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