Groundwater level monitoring device and groundwater level monitoring method

Abstract

The present application discloses a groundwater level monitoring device and a groundwater level monitoring method, belonging to the technical field of geological exploration. The key technical points of its technical solution include a wire reel, a rope, and a water level measuring instrument. A scale is provided on the rope, and a guiding device is connected to the rope. The guiding device includes a fixing plate, a guiding block, and an adjusting component. The fixing plate is sleeved on the rope, the guiding block is sleeved on the fixing plate and is slidably connected to the fixing plate. The guiding block matches the observation well wall, and the adjusting component is connected to the guiding block; the water level measuring instrument is connected with a floating plate, the rope is connected with a tension sensor, the tension sensor is arranged between the water level measuring instrument and the fixing plate, the guiding block is connected with a reinforcement device for fixing the position of the guiding block and the observation well, the fixing plate is connected with the adjusting component, and the relative position of the fixing plate and the guiding block can be adjusted to generate tension on the rope below the fixing plate, achieving the effect of improving the accuracy of groundwater level monitoring.

Description

Technical Field

[0001] This application relates to the technical field of geological exploration, and particularly to an underground water level monitoring device and an underground water level monitoring method. Background Art

[0002] Hydrogeological exploration aims to master the origin, distribution and movement laws of groundwater and surface water, including two aspects of underground and above-ground hydrogeological surveys. Underground water level monitoring is an important part of hydrogeological exploration. Underground water level monitoring mainly investigates and studies the water level changes of perched water, phreatic aquifer and confined aquifer in different seasons throughout the year, and can provide factual basis for the management of underground water resources, thus facilitating the management of underground water resources.

[0003] Currently, when monitoring the underground water level, a wire reel, a graduated rope and a water level measuring instrument are generally used. The water level measuring instrument is lowered along the edge of the observation well through the rope. When the water level measuring instrument contacts the groundwater, a warning is issued, and the operator stops lowering the rope. By observing the scale used to lower the water level measuring instrument, the distance between the underground water level and the ground is determined. Since the release of the rope or the suspension is manually operated, after the water level measuring instrument has issued a warning, the operator hears the warning and then stops lowering the water level measuring instrument after a reaction in the brain, resulting in deviation in the measurement results of this measurement method. Summary of the Invention

[0004] In order to improve the accuracy of underground water level monitoring, the present invention provides an underground water level monitoring device and an underground water level monitoring method.

[0005] The underground water level monitoring device provided by the present invention adopts the following technical solutions:

[0006] The underground water level monitoring device includes a wire reel, a rope and a water level measuring instrument. A scale is provided on the rope. A guiding device is connected to the rope. The guiding device is used to move the rope in the observation well. The guiding device includes a fixing plate, a guiding block and an adjusting component. The fixing plate is sleeved on the rope and fixedly connected to the rope. The guiding block is sleeved on the fixing plate and slidably connected to the fixing plate. The guiding block matches the inner wall of the observation well. The adjusting component is connected to the guiding block. The water level measuring instrument is connected with a floating plate. The rope is connected with a tension sensor. The tension sensor is arranged between the water level measuring instrument and the fixing plate. The guiding block is connected with a reinforcing device. The reinforcing device can selectively abut against or separate from the inner wall of the observation well. The fixing plate is connected with the adjusting component and can adjust the relative position between the fixing plate and the guiding block to generate tension on the rope below the fixing plate.

[0007] By adopting the above technical solution, first place the wire reel on the observation well, then place the water level measuring instrument and the guiding device in the observation well, and rotate the wire reel to evenly release the rope. The floating plate drives the water level measuring instrument to float on the water surface of the groundwater. The water level measuring instrument gives a warning and stops releasing the rope. When more rope is released, the guiding device functions as a counterweight, so the rope above the fixing plate is in a straight state. Due to the effect of the floating plate, the extra released rope is located between the fixing plate and the water level measuring instrument. At this time, the reading of the tension sensor is zero or relatively small. Start the reinforcement device to fix the position of the guiding block. Start the adjusting component. The adjusting component adjusts the relative position of the fixing plate and the guiding block, observes the reading of the tension sensor, finds the critical value at which the reading of the tension sensor suddenly increases, and adjusts the fixing plate so that the reading of the tension sensor remains at the critical value. At this time, the rope below the fixing plate is in a straight state. Reverse the wire reel to retract the rope until the rope above the fixing plate is straightened, and read the scale of the rope. The accuracy of underground water level monitoring is improved.

[0008] Preferably, the adjusting component includes a motor, a screw rod, and a slider. A first sliding groove is formed in the inner wall of the guiding block. The motor is connected to the guiding block. The screw rod is vertically arranged in the first sliding groove. One end of the screw rod is rotatably connected to the guiding block, and the other end passes through the guiding block and is connected to the motor. The slider matches the first sliding groove. The slider is sleeved on the screw rod and is threadedly connected to the screw rod. The fixing plate is fixedly connected to the slider.

[0009] By adopting the above technical solution, when it is necessary to adjust the fixing plate, start the motor. The motor drives the screw rod to rotate. The screw rod drives the slider to move in the vertical direction. The slider drives the fixing plate to move in the vertical direction to realize the tensioning of the rope below the fixing plate.

[0010] Preferably, a linkage cavity is formed in the guiding block. There are multiple sliders and screw rods. Multiple screw rods all pass through the linkage cavity. A sprocket is sleeved on the screw rod. The sprocket is arranged in the linkage cavity, and a chain is sleeved on multiple sprockets and meshes with the chain to realize the synchronous rotation of multiple sprockets.

[0011] By adopting the above technical solution, multiple screw rods can drive multiple sliders to move synchronously. Multiple sliders drive the fixing plate to move in the vertical direction, thereby reducing the stress on the sliders.

[0012] Preferably, the reinforcement device includes a top block, a push rod, and a driving component. A placement groove is formed on the outer wall of the guiding block. The top block and the push rod are arranged in the placement groove. One end of the push rod is connected to the top block, and the other end of the push rod is connected to the driving component. The driving component is used to make the push rod push the top block to abut against the observation well. The driving component is connected to the guiding block.

[0013] By adopting the above technical solution, the working of the driving component can make the push rod push the top block against the observation well wall, achieving the purpose of fixing the guiding block and facilitating the adjustment of the fixing plate.

[0014] Preferably, a second sliding groove is formed in the inner wall of the guiding block, an activity cavity is formed in the guiding block, the activity cavity is communicated with the second sliding groove, the fixing plate is connected with a convex block, the convex block is arranged in the second sliding groove and is slidably connected with the guiding block; the driving component includes a rotating shaft, a lever, a counterweight, a gear and a rack, the first end of the rotating shaft is arranged in the activity cavity, the second end of the rotating shaft passes through the guiding block and extends into the second sliding groove, the rotating shaft is rotatably connected with the guiding block, the lever and the counterweight are arranged in the activity cavity, the lever is sleeved on the rotating shaft, the first end of the lever extends into the second sliding groove, the top surface of the lever abuts against the convex block, the counterweight is slidably connected with the guiding block, and the counterweight abuts against the top surface of the second end of the lever; the gear and the rack are both arranged in the placing groove, the gear is sleeved on the rotating shaft, the rack is slidably connected with the guiding block, the rack is meshed with the gear, and the push rod is connected with the rack and is used for pushing the top block to move towards the observation well.

[0015] By adopting the above technical solution, while the fixing plate moves in the vertical direction, the convex block moves together with the fixing plate. After the convex block disengages from the first end of the lever, the counterweight presses down the second end of the lever, thereby causing the lever to rotate, the lever drives the rotating shaft to rotate, the rotating shaft drives the gear to rotate, the gear drives the rack to move, and the rack drives the push rod to move, thereby pushing the top block.

[0016] Preferably, a first magnet is connected to the bottom of the counterweight, a second magnet connected to the guiding block is arranged in the activity cavity, the second magnet is located below the first magnet, the first magnet and the second magnet attract each other, a clamping groove is formed in the counterweight, when the first magnet abuts against the second magnet, the lever extends into the clamping groove, and the top block abuts against the observation well.

[0017] By adopting the above technical solution, when the first magnet contacts the second magnet, part of the lever is inserted into the clamping groove, and at the same time the top block contacts the observation well wall, increasing the stability of the reinforcement device.

[0018] Preferably, the length from the end face of the lever close to the counterweight to the rotating shaft is greater than the length from the other end to the rotating shaft.

[0019] By adopting the above technical solution, the asymmetric design is beneficial to generating a larger thrust with a smaller force, increasing the stability of the end of the lever close to the counterweight, and effectively utilizing the lever principle to improve the working efficiency.

[0020] Preferably, the wire reel is connected with a bracket, the bracket is connected with a limiting component, the limiting component includes a first rod, a first wheel, a second rod and a second wheel. The first rod and the second rod are both connected with the bracket, the first rod and the second rod are symmetrically arranged, the first wheel is connected with the first rod, the second wheel is connected with the second rod, the circumferential surfaces of the first wheel and the second wheel are both concave surfaces, a first annular groove is formed in the first wheel, a second annular groove is formed in the second wheel, and the relatively arranged first annular groove and the second annular groove enclose a limiting space. The limiting space is sleeved on the outer periphery of the rope, and is used for keeping the rope released by the wire reel at the center of the observation well.

[0021] By adopting the above technical solution, the rope is clamped between the first wheel and the second wheel to keep the rope always at the center of the observation well, thereby effectively reducing the possibility of errors caused by the swing of the rope with the water flow.

[0022] Preferably, a benchmark is arranged on the top surface of the observation well, the benchmark is located below the first rod, and the benchmark is used for observing the scale of the rope.

[0023] By adopting the above technical solution, it is convenient to directly read the scale information on the rope, and the observation convenience is improved.

[0024] The present invention also provides a water level monitoring method for the underground water level monitoring device, including the following steps:

[0025] S1. Place the water level measuring instrument and the guiding device in the observation well, and rotate the wire reel to release the rope at a uniform speed;

[0026] S2. The floating plate drives the water level measuring instrument to float on the water surface of the groundwater, the water level measuring instrument gives a warning, and stop releasing the rope;

[0027] S3. Start the reinforcement device to fix the position of the guiding block;

[0028] S4. Start the adjusting component, the adjusting component adjusts the relative position of the fixing plate and the guiding block, observe the reading of the tension sensor, find the critical value at which the reading of the tension sensor suddenly increases, and adjust the fixing plate to keep the reading of the tension sensor at the critical value. At this time, the rope below the fixing plate is in a straightened state;

[0029] S5. Reverse the wire reel to retract the rope until the rope above the fixing plate is straightened, and read the scale of the rope.

[0030] In summary, the present invention has the following beneficial effects:

[0031] First, place the wire reel on the observation well, then place the water level measuring instrument and the guiding device in the observation well, and rotate the wire reel to release the rope at a constant speed. The floating plate drives the water level measuring instrument to float on the water surface of the groundwater. The water level measuring instrument gives an alarm and the wire reel stops releasing the rope. Start the reinforcement device to fix the position of the guiding block. Start the adjustment component. The adjustment component adjusts the relative position of the fixed plate and the guiding block. Observe the reading of the tension sensor, find the critical value at which the reading of the tension sensor suddenly increases, and adjust the fixed plate so that the reading of the tension sensor remains at the critical value. At this time, the rope below the fixed plate is in a straightened state. Reverse the wire reel to retract the rope until the rope above the fixed plate is straightened, and read the scale of the rope. The accuracy of groundwater level monitoring is improved. Description of the Drawings

[0032] Figure 1 It is a schematic diagram of the overall structure of the groundwater level monitoring device.

[0033] Figure 2 It aims to show the usage state of the groundwater level monitoring device in the observation well.

[0034] Figure 3 It is a schematic diagram of the structure of the limiting component.

[0035] Figure 4 It is an exploded view of the guiding block and the fixed plate.

[0036] Figure 5 It is an internal structure diagram of the guiding block.

[0037] Figure 6 It is a schematic diagram of the structure of the reinforcement device.

[0038] Figure 7 It is a flowchart of the water level monitoring method.

[0039] Description of the Reference Numerals:

[0040] 1. Wire reel; 11. Bracket; 2. Rope; 21. Tension sensor; 22. Water level measuring instrument; 221. Floating plate; 3. Benchmark; 4. Limiting component; 41. First rod; 42. First wheel; 43. Second rod; 44. Second wheel; 5. Guiding device; 51. Guiding block; 511. First sliding groove; 512. Linkage cavity; 513. Second sliding groove; 514. Placing groove; 515. Moving cavity; 52. Fixed plate; 521. Convex block; 53. Adjustment component; 531. Motor; 532. Screw rod; 533. Slide block; 6. Reinforcement device; 61. Top block; 62. Push rod; 63. Driving component; 631. Rotating shaft; 632. Lever; 633. Counterweight block; 6331. Card slot; 634. Gear; 635. Rack; 7. First magnet; 8. Second magnet. Detailed Embodiment

[0041] The present invention will be further described in detail below with reference to the accompanying drawings.

[0042] An underground water level monitoring device and an underground water level monitoring method, referring to Figure 1 and Figure 2 , include a wire reel 1, a rope 2 and a water level measuring instrument 22. The rope 2 is provided with scales. A guiding device 5 is connected to the rope 2. The guiding device 5 includes a fixing plate 52, a guiding block 51 and an adjusting assembly 53. The fixing plate 52 is sleeved on the rope 2. The guiding block 51 is sleeved on the fixing plate 52 and is slidably connected to the fixing plate 52. The guiding block 51 matches the observation well. The adjusting assembly 53 is connected to the guiding block 51. The guiding device 5 can move the rope 2 in the observation well. The water level measuring instrument 22 is fixedly connected with a floating plate 221. The rope 2 is fixedly connected with a tension sensor 21. The tension sensor 21 is arranged between the water level measuring instrument 22 and the fixing plate 52. The guiding block 51 is connected with a reinforcing device 6. The reinforcing device 6 can selectively abut against or separate from the inner wall of the observation well. The fixing plate 52 is connected with the adjusting assembly 53 and can adjust the relative position of the fixing plate 52 and the guiding block 51 to generate a tension on the rope 2 below the fixing plate 52.

[0043] First, place the wire reel 1 on the observation well, and then place the water level measuring instrument 22 and the guiding device 5 into the observation well. Rotate the wire reel 1 to evenly release the rope 2. The floating plate 221 drives the water level measuring instrument 22 to float on the water surface of the groundwater. The water level measuring instrument 22 gives a warning and stops releasing the rope. When more rope 2 is released, the guiding device 5 has a counterweight function, so the rope 2 above the fixing plate 52 is in a taut state. Due to the function of the floating plate 221, the extra released rope 2 is located between the fixing plate 52 and the water level measuring instrument 22. At this time, the reading of the tension sensor 21 is zero or relatively small. Start the reinforcing device 6 to fix the position of the guiding block 51. Start the adjusting assembly 53. The adjusting assembly 53 adjusts the relative position of the fixing plate 52 and the guiding block 51, observes the reading of the tension sensor 21, finds the critical value at which the reading of the tension sensor 21 suddenly increases, and adjusts the fixing plate 52 so that the reading of the tension sensor 21 remains at the critical value. At this time, the rope 2 below the fixing plate 52 is in a taut state. Reverse the wire reel 1 to retract the rope 2 until the rope 2 above the fixing plate 52 is taut, and read the scale of the rope 2. The accuracy of underground water level monitoring is improved.

[0044] Referring to Figure 1 and Figure 2 , the wire reel 1 is installed on a bracket 11. The bracket 11 is composed of two vertical plates. When the wire reel 1 is arranged at the top of the observation well, the two vertical plates are arranged on both sides of the observation well.

[0045] Referring to Figure 2 and Figure 3, the bracket 11 is connected with a limit component 4. The limit component 4 includes a first rod 41, a first wheel 42, a second rod 43 and a second wheel 44. The first rod 41 and the second rod 43 are both horizontally arranged, symmetrically arranged, and located above the observation well. Both the first rod 41 and the second rod 43 are fixedly connected to the bracket 11. The first wheel 42 is rotatably connected to one end of the first rod 41 close to the second rod 43. The second wheel 44 is rotatably connected to one end of the second rod 43 close to the first rod 41.

[0046] A first annular groove is formed on the first wheel 42, and a second annular groove is formed on the second wheel 44. The cross-sectional shape of the first annular groove and the second annular groove can be one of a square, an inverted trapezoid, a triangle or other common figures. Preferably, the cross-sectional shape of the first annular groove and the second annular groove is arc-shaped. The arc-shaped groove can better fit the outer periphery of the rope 2. The relatively arranged first annular groove and the second annular groove enclose a limit space, and the limit space is sleeved on the outer periphery of a part of the rope 2.

[0047] The rope 2 is clamped between the first wheel 42 and the second wheel 44 to keep the rope 2 always at the center of the observation well, thereby effectively reducing the possibility of errors caused by the swing of the rope 2 with the water flow.

[0048] Refer to Figure 1 and Figure 2 , a benchmark 3 is horizontally placed on the top surface of the observation well. The benchmark 3 is sleeved on the rope 2 and there is a gap between the benchmark 3 and the rope 2. The benchmark 3 is located below the limit component 4. So as to directly read the scale information on the rope 2 and improve the observation convenience.

[0049] Refer to Figure 4 , the adjusting component 53 includes a motor 531, a screw rod 532 and a slider 533.The motor 531 is fixedly connected to the top of the guide block 51, and the driving shaft of the motor 531 extends into the guide block 51. The screw rod 532 and the slider 533 form a moving group, and multiple groups of moving groups are arranged at equal intervals along the axial direction of the guide block 51. In this embodiment, four groups of moving groups are arranged.

[0050] Refer to Figure 4 , a first chute 511 is formed on the inner wall of the guide block 51, and four first chutes 511 are formed. The four first chutes 511 correspond to the four moving groups one by one. The screw rod 532 is vertically arranged in the corresponding first chute 511. The sliders 533 in the same group are sleeved on the screw rod 532 and are threadedly connected to the screw rod 532. The slider 533 matches with the first chute 511, and the slider 533 is slidably connected to the guide block 51. The driving shaft of the motor 531 is fixed to any screw rod 532.

[0051] Refer to Figure 4 and Figure 5, a linkage cavity 512 is formed in the guide block 51, and the screw rod 532 passes through the linkage cavity 512. A sprocket is sleeved on the screw rod 532, and the sprocket is arranged in the linkage cavity 512. A chain is sleeved outside the four sprockets, and the chain is meshed with all four sprockets.

[0052] When the fixed plate 52 needs to be adjusted, the motor 531 is started. The motor 531 drives the screw rod 532 to rotate. The screw rod 532 drives the four sprockets to move synchronously through the chain, and then drives the four sliders 533 to move in the vertical direction. The sliders 533 drive the fixed plate 52 to move in the vertical direction, so as to realize the tensioning of the rope 2 below the fixed plate 52.

[0053] Refer to Figure 4 , multiple groups of reinforcement devices 6 are provided. In this embodiment, four groups are provided. The four groups of reinforcement devices 6 and the four groups of moving groups are arranged in a staggered manner.

[0054] Refer to Figure 4 , a second chute 513 is formed in the inner wall of the guide block 51. The guide block 51 is fixedly connected with a convex block 521. There are four convex blocks 521, and the four convex blocks 521 correspond to the four second sliders 533 one by one. The convex block 521 is arranged in the second chute 513 and is slidably connected with the guide block 51. A placement groove 514 is arranged on the outer wall of the guide block 51, and an activity cavity 515 is formed in the guide block 51. The activity cavity 515 is communicated with the second chute 513.

[0055] Refer to Figure 4 and Figure 6 , the reinforcement device 6 includes a top block 61, a push rod 62 and a driving component 63. Both the top block 61 and the push rod 62 are arranged in the placement groove 514. The push rod 62 is slidably connected with the guide block 51, and the top block 61 is fixedly connected with the push rod 62. The driving component 63 includes a rotating shaft 631, a lever 632, a counterweight 633, a gear 634 and a rack 635. The first end of the rotating shaft 631 is arranged in the activity cavity 515, and the second end passes through the guide block 51 and extends into the placement groove 514. The rotating shaft 631 is rotatably connected with the guide block 51.

[0056] Refer to Figure 4 and Figure 6 , the lever 632 and the counterweight 633 are arranged in the activity cavity 515. The lever 632 is sleeved on the rotating shaft 631 and is fixedly connected with the rotating shaft 631. The first end of the lever 632 extends into the second chute 513, and the top surface of the second end of the lever 632 abuts against the bottom of the convex block 521. The bottom of the counterweight 633 abuts against the top surface of the second end of the lever 632. And the length from the end surface of the second end of the lever 632 to the rotating shaft 631 is greater than the length from the end surface of the first end to the rotating shaft 631.

[0057] While the fixing plate 52 moves in the vertical direction, the convex block 521 moves together with the fixing plate 52. After the convex block 521 detaches from the first end of the lever 632, the counterweight 633 presses down the second end of the lever 632, thereby causing the lever 632 to rotate, and the lever 632 drives the rotating shaft 631 to rotate.

[0058] Refer to Figure 4 and Figure 6 , a first magnet 7 is fixedly connected to the bottom of the counterweight 633, a second magnet 8 is arranged in the movable cavity 515, and the second magnet 8 is fixedly connected to the guide block 51. The second magnet 8 is located below the first magnet 7, and the first magnet 7 and the second magnet 8 attract each other. A clamping groove 6331 is formed in the counterweight 633. When the first magnet 7 abuts against the second magnet 8, the second end of the lever 632 extends into the clamping groove 6331.

[0059] When the first magnet 7 contacts the second magnet 8, a part of the lever 632 is inserted into the clamping groove 6331. At the same time, the top block 61 contacts the observation well wall, increasing the stability of the reinforcement device 6.

[0060] Refer to Figure 4 and Figure 6 , the gear 634 and the rack 635 are arranged in the placement groove 514. The gear 634 is sleeved on the rotating shaft 631, the gear 634 meshes with the rack 635, the rack 635 is slidably connected to the guide block 51, and one end of the rack 635 is fixedly connected to the push rod 62.

[0061] The rotating shaft 631 drives the gear 634 to rotate, the gear 634 drives the rack 635 to move, and the rack 635 drives the push rod 62 to move, thereby pushing the top block 61.

[0062] This embodiment also provides a water level monitoring method for the underground water level monitoring device. Refer to Figure 7 , including the following steps:

[0063] S1. Place the water level measuring instrument 22 and the guiding device 5 in the observation well, and rotate the wire reel 1 to evenly release the rope 2;

[0064] S2. The floating plate 221 drives the water level measuring instrument 22 to float on the water surface of the groundwater, and the water level measuring instrument 22 gives a warning to stop releasing the wire;

[0065] S3. Start the reinforcement device 6 to fix the position of the guide block 51;

[0066] S4. Start the adjusting assembly 53. The adjusting assembly 53 adjusts the relative position between the fixing plate 52 and the guide block 51, observes the reading of the tension sensor 21, finds the critical value at which the reading of the tension sensor 21 suddenly increases, and adjusts the fixing plate 52 to keep the reading of the tension sensor 21 at the critical value. At this time, the rope 2 below the fixing plate 52 is in a taut state;

[0067] S5. The reverse wire reel 1 retracts the rope 2 until the rope 2 above the fixed plate 52 is straightened, and reads the scale of the rope 2.

[0068] The working principle of this application is as follows: First, place the wire reel 1 on the observation well, then place the water level measuring instrument 22 and the guiding device 5 into the observation well, and rotate the wire reel 1 to release the rope 2 at a constant speed until the floating plate 221 drives the water level measuring instrument 22 to float on the water surface of the groundwater. When the water level measuring instrument 22 gives a warning, stop releasing the rope.

[0069] When more rope 2 is released, the guiding device 5 has a counterweight function, so the rope 2 above the fixed plate 52 is in a straightened state. Due to the function of the floating plate 221, the extra released rope 2 is located between the fixed plate 52 and the water level measuring instrument 22. At this time, the reading of the tension sensor 21 is zero or relatively small.

[0070] Start the motor 531. The motor 531 drives the screw rod 532 to rotate. The screw rod 532 drives four sprockets to move synchronously through the chain, and then drives the four sliders 533 to move in the vertical direction. The sliders 533 drive the fixed plate 52 to move in the vertical direction.

[0071] The convex block 521 moves together with the fixed plate 52. At the moment when the fixed plate 52 moves, the convex block 521 disengages from the first end of the lever 632, and then the counterweight block 633 presses down the second end of the lever 632, thereby causing the lever 632 to rotate. The lever 632 drives the rotating shaft 631 to rotate, the rotating shaft 631 drives the gear 634 to rotate, the gear 634 drives the rack 635 to move, and the rack 635 drives the push rod 62 to move, thereby pushing the top block 61 closer to the observation well. Since the guiding blocks 51 all have a guiding effect in the observation well, the gap between the guiding blocks 51 and the observation well is small. Only by pushing out the top block 61 can the guiding blocks 51 be limited. After the guiding blocks 51 are fixed, the rope 2 is driven more stably when the fixed plate 52 is moved.

[0072] When adjusting the fixed plate 52, observe the reading of the tension sensor 21 in real time, find the critical value at which the reading of the tension sensor 21 suddenly increases, and adjust the fixed plate 52 so that the reading of the tension sensor 21 remains at the critical value. At this time, the rope 2 below the fixed plate 52 is in a straightened state. Reverse the wire reel 1 to retract the rope 2 until the rope 2 above the fixed plate 52 is straightened, and read the scale of the rope 2. The accuracy of underground water level monitoring is improved.

[0073] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. Groundwater level monitoring device, comprising a wire reel (1), a rope (2) and a water level measuring instrument (22), wherein the rope (2) is provided with graduations, and is characterized in that: A guiding device (5) is connected to the rope (2). The guiding device (5) is used to move the rope (2) in the observation well. The guiding device (5) includes a fixing plate (52), a guiding block (51) and an adjusting assembly (53). The fixing plate (52) is sleeved on the rope (2) and fixedly connected to the rope (2). The guiding block (51) is sleeved on the fixing plate (52) and slidably connected to the fixing plate (52). The guiding block (51) matches the inner wall of the observation well. The adjusting assembly (53) is connected to the guiding block (51); The water level measuring instrument (22) is connected with a floating plate (221). The rope (2) is connected with a tension sensor (21). The tension sensor (21) is arranged between the water level measuring instrument (22) and the fixing plate (52). The guiding block (51) is connected with a reinforcement device (6). The reinforcement device (6) can selectively abut against or separate from the inner wall of the observation well; The fixing plate (52) is connected with the adjusting assembly (53), and can adjust the relative position between the fixing plate (52) and the guiding block (51) to generate tension on the rope (2) below the fixing plate (52); The adjusting assembly (53) includes a motor (531), a screw rod (532) and a slider (533). A first sliding groove (511) is formed in the inner wall of the guiding block (51). The motor (531) is connected with the guiding block (51). The screw rod (532) is vertically arranged in the first sliding groove (511). One end of the screw rod (532) is rotatably connected to the guiding block (51), and the other end passes through the guiding block (51) and is connected with the motor (531). The slider (533) matches the first sliding groove (511). The slider (533) is sleeved on the screw rod (532) and is threadedly connected to the screw rod (532). The fixing plate (52) is fixedly connected with the slider (533); The reinforcement device (6) includes a top block (61), a push rod (62) and a driving assembly (63). A placement groove (514) is formed in the outer wall of the guiding block (51). The top block (61) and the push rod (62) are arranged in the placement groove (514). One end of the push rod (62) is connected with the top block (61), and the other end of the push rod (62) is connected with the driving assembly (63). The driving assembly (63) is used to push the top block (61) to abut against the observation well. The driving assembly (63) is connected with the guiding block (51); A second sliding groove (513) is formed in the inner wall of the guiding block (51). An activity cavity (515) is formed in the guiding block (51). The activity cavity (515) is communicated with the second sliding groove (513). The fixing plate (52) is connected with a convex block (521). The convex block (521) is arranged in the second sliding groove (513) and is slidably connected to the guiding block (51); The driving component (63) includes a rotating shaft (631), a lever (632), a counterweight (633), a gear (634) and a rack (635). The first end of the rotating shaft (631) is arranged in the moving cavity (515), the second end of the rotating shaft (631) passes through the guiding block (51) and extends into the placing groove (514), the rotating shaft (631) is rotatably connected to the guiding block (51), the lever (632) and the counterweight (633) are arranged in the moving cavity (515), the lever (632) is sleeved on the rotating shaft (631), the first end of the lever (632) extends into the second sliding groove (513), the top surface of the lever (632) abuts against the convex block (521), the counterweight (633) is slidably connected to the guiding block (51), and the counterweight (633) abuts against the top surface of the second end of the lever (632); The gear (634) and the rack (635) are both arranged in the placing groove (514), the gear (634) is sleeved on the rotating shaft (631), the rack (635) is slidably connected to the guiding block (51), the rack (635) meshes with the gear (634), and the push rod (62) is connected to the rack (635) and is used for pushing the top block (61) to move towards the observation well.

2. The groundwater level monitoring device according to claim 1, wherein: A linkage cavity (512) is formed in the guiding block (51), a plurality of sliders (533) and a plurality of screws (532) are provided, the plurality of screws (532) all pass through the linkage cavity (512), a sprocket is sleeved on each screw (532), the sprockets are arranged in the linkage cavity (512), and a chain is sleeved on the plurality of sprockets and meshes with the chain to realize synchronous rotation of the plurality of sprockets.

3. The groundwater level monitoring device according to claim 1, characterized in that: A first magnet (7) is connected to the bottom of the counterweight (633), a second magnet (8) connected to the guiding block (51) is arranged in the moving cavity (515), the second magnet (⑧) is located below the first magnet (7), the first magnet (7) and the second magnet (8) attract each other, a clamping groove (6331) is formed in the counterweight (633), when the first magnet (7) abuts against the second magnet (8), the lever (632) extends into the clamping groove (6331), and the top block (61) abuts against the observation well.

4. The groundwater level monitoring device according to claim 3, wherein: The length from the end face of the lever (632) close to the counterweight (633) to the rotating shaft (631) is greater than the length from the other end to the rotating shaft (631).

5. The groundwater level monitoring device according to claim 1, wherein: The pay-off reel (1) is connected to a bracket (11), the bracket (11) is connected to a limiting component (4), the limiting component (4) includes a first rod (41), a first wheel (42), a second rod (43) and a second wheel (44), the first rod (41) and the second rod (43) are both connected to the bracket (11), the first rod (41) and the second rod (43) are symmetrically arranged, the first wheel (42) is connected to the first rod (41), the second wheel (44) is connected to the second rod (43), a first annular groove is formed in the first wheel (42), a second annular groove is formed in the second wheel (44), the oppositely arranged first annular groove and second annular groove enclose a limiting space, and the limiting space is sleeved on the outer periphery of the rope (2) for keeping the rope (2) released by the pay-off reel (1) at the center of the observation well.

6. The groundwater level monitoring device according to claim 5, wherein: A benchmark (3) is provided on the top surface of the observation well, and the benchmark (3) is located below the first rod (41) for observing the scale of the rope (2).

7. The water level monitoring method of the groundwater level monitoring device is applied to the groundwater level monitoring device according to any one of claims 1-6, characterized in that, It includes the following steps: S1. Place the water level measuring instrument (22) and the guiding device (5) in the observation well, and rotate the pay-off reel (1) to evenly release the rope (2); S2. The floating plate (221) drives the water level measuring instrument (22) to float on the water surface of the groundwater, the water level measuring instrument (22) gives an alarm, and the release of the rope is stopped; S3. Start the reinforcement device (6) to fix the position of the guiding block (51); S4. Start the adjusting component (53), the adjusting component (53) adjusts the relative position of the fixing plate (52) and the guiding block (51), observe the reading of the tension sensor (21), find the critical value at which the reading of the tension sensor (21) suddenly increases, and adjust the fixing plate (52) to keep the reading of the tension sensor (21) at the critical value. At this time, the rope (2) below the fixing plate (52) is in a straightened state; S5. Reverse the pay-off reel (1) to retract the rope (2) until the rope (2) above the fixing plate (52) is straightened, and read the scale of the rope (2).

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