Underground water level monitoring device and underground water level monitoring method

Abstract

The invention discloses an underground water level monitoring device and an underground water level monitoring method, and belongs to the technical field of geological prospecting, the underground water level monitoring device comprises a pay-off device, a rope and a water level measuring instrument, the rope is provided with scales, the rope is connected with a guiding device, the guiding device comprises a fixing plate, a guiding block and an adjusting assembly, the fixing plate sleeves the rope, and the guiding block is connected with the adjusting assembly; the guide block sleeves the fixing plate and is in sliding connection with the fixing plate, the guide block is matched with the observation well wall, and the adjusting assembly is connected with the guide 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 guide block is connected with a reinforcing device for fixing the positions of the guide block and the observation well, and the fixing plate is connected with the adjusting assembly so that the relative position of the fixing plate and the guide block can be adjusted. The rope below the fixing plate generates pulling force, and the effect of improving the accuracy of underground water level monitoring is achieved.

Description

Technical Field

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

[0002] Hydrogeological exploration aims to master the genesis, distribution and movement laws of groundwater and surface water, including two aspects of underground and above-ground hydrogeological surveys. And underground water level monitoring is an important part of hydrogeological exploration. Underground water level monitoring mainly investigates 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 calibrated 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 pause 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 the brain reacts, 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: An 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 reinforcement device. The reinforcement 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.

[0006] 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 the wire releasing stops. When more rope is released, the guiding device has a counterweight function, 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 small. Start the reinforcement device to fix the position of the guiding block. Start the adjusting component. The adjusting component adjusts the relative position between 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 straight, and read the scale of the rope. The accuracy of underground water level monitoring is improved.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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 of the sliders.

[0011] Preferably, the reinforcement device includes a top block, a push rod and a driving component. A placement groove is formed in 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. 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] By adopting the above technical solution, the asymmetric design is beneficial to generating a large thrust with a small 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.

[0019] Preferably, the wire reel is connected to a bracket, and the bracket is connected to a limiting component. The limiting component includes a first rod, a first wheel, a second rod, and a second wheel. Both the first rod and the second rod are connected to the bracket, and the first rod and the second rod are symmetrically arranged. The first wheel is connected to the first rod, and the second wheel is connected to 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, and a second annular groove is formed in the second wheel. 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 for keeping the rope released by the wire reel at the center of the observation well.

[0020] 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 swinging of the rope with the water flow.

[0021] Preferably, a benchmark is provided on the top surface of the observation well. The benchmark is located below the first rod and is used to observe the scale of the rope.

[0022] By adopting the above technical solution, it is convenient to directly read the scale information on the rope, improving the convenience of observation.

[0023] The present invention also provides a water level monitoring method for the underground water level monitoring device, including the following steps: 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 constant speed; S2. The floating plate drives the water level measuring instrument to float on the water surface of the underground water, and the water level measuring instrument gives a warning to stop releasing the rope; S3. Start the reinforcement device to fix the position of the guiding block; S4. Start the adjusting component. The adjusting component adjusts the relative position between 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 to keep the reading of the tension sensor at the critical value. At this time, the rope below the fixing plate is in a straight state; 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.

[0024] In summary, the present invention has the following beneficial effects: 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. When the water level measuring instrument gives a warning, stop releasing the rope. Start the reinforcement device to fix the position of the guiding block. Start the adjustment component, and 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 taut state. Reverse the wire reel to retract the rope until the rope above the fixed plate is taut, and read the scale of the rope. This improves the accuracy of underground water level monitoring. Brief Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall structure of the underground water level monitoring device.

[0026] Figure 2 It is intended to show the usage state of the underground water level monitoring device in the observation well.

[0027] Figure 3 It is a schematic diagram of the structure of the limiting component.

[0028] Figure 4 It is an exploded view of the guiding block and the fixed plate.

[0029] Figure 5 It is an internal structure diagram of the guiding block.

[0030] Figure 6 It is a schematic diagram of the structure of the reinforcement device.

[0031] Figure 7 It is a flowchart of the water level monitoring method.

[0032] Description of the Reference Numerals: 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 chute; 512. Linkage cavity; 513. Second chute; 514. Placing groove; 515. Activity 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; 6331. Card slot; 634. Gear; 635. Rack; 7. First magnet; 8. Second magnet. Detailed Embodiments

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Underground water level monitoring device and underground water level monitoring method, refer to Figure 1 and Figure 2 , including a wire reel 1, a rope 2 and a water level measuring instrument 22, with scales provided on the rope 2. 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 component 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, and the adjusting component 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 float plate 221. The rope 2 is fixedly connected with a tension sensor 21, and 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, and 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 component 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.

[0035] First, place the wire reel 1 on top of 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 evenly release the rope 2. The float 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 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 effect of the float 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 small. Start the reinforcement device 6 to fix the position of the guiding block 51. Start the adjusting component 53, and the adjusting component 53 adjusts the relative position between 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 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.

[0036] Refer to Figure 1 and Figure 2 , the wire reel 1 is installed on the bracket 11, and the bracket 11 is composed of two vertical plates. When the wire reel 1 is arranged on top of the observation well, the two vertical plates are arranged on both sides of the observation well.

[0037] Refer to Figure 2 and Figure 3, the bracket 11 is connected with 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 horizontally arranged, symmetrically arranged, and located above the observation well. Both the first rod 41 and the second rod 43 are fixedly connected with 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.

[0038] A first annular groove is formed in the first wheel 42, and a second annular groove is formed in 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 circumference of the rope 2. The oppositely arranged first annular groove and second annular groove enclose a limiting space, and the limiting space is sleeved on the outer circumference of a part of the rope 2.

[0039] 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.

[0040] 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 limiting component 4. So as to directly read the scale information on the rope 2 and improve the observation convenience.

[0041] 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.

[0042] Refer to Figure 4 , a first chute 511 is formed in 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 one of the screw rods 532.

[0043] Refer to Figure 4 and Figure 5, a linkage cavity 512 is formed in the guiding 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 the four sprockets.

[0044] When it is necessary to adjust the fixing plate 52, 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 fixing plate 52 to move in the vertical direction, so as to tighten the rope 2 below the fixing plate 52.

[0045] Refer to Figure 4 , multiple groups of reinforcing devices 6 are provided. In this embodiment, four groups are provided. The four groups of reinforcing devices 6 and the four groups of moving groups are arranged in a staggered manner.

[0046] Refer to Figure 4 , a second sliding groove 513 is formed in the inner wall of the guiding block 51. The guiding 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 sliding groove 513 and is slidably connected with the guiding block 51. A placing groove 514 is arranged on the outer wall of the guiding block 51, and an activity cavity 515 is formed in the guiding block 51. The activity cavity 515 is communicated with the second sliding groove 513.

[0047] Refer to Figure 4 and Figure 6 , the reinforcing device 6 includes a top block 61, a push rod 62 and a driving assembly 63. The top block 61 and the push rod 62 are both arranged in the placing groove 514. The push rod 62 is slidably connected with the guiding block 51, and the top block 61 is fixedly connected with the push rod 62. The driving assembly 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 guiding block 51 and extends into the placing groove 514. The rotating shaft 631 is rotatably connected with the guiding block 51.

[0048] 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 sliding groove 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.

[0049] 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 disengages 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.

[0050] 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 provided 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 card slot 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 card slot 6331.

[0051] When the first magnet 7 contacts the second magnet 8, a part of the lever 632 is inserted into the card slot 6331. At the same time, the top block 61 contacts the observation well wall, increasing the stability of the reinforcement device 6.

[0052] 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.

[0053] The rotating shaft 631 drives the gear 634 to rotate, the gear 634 drives the rack 635 to move, the rack 635 drives the push rod 62 to move, and thus the top block 61 is pushed.

[0054] This embodiment also provides a water level monitoring method for the underground water level monitoring device. Refer to Figure 7 , including the following steps: 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; 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; S3. Start the reinforcement device 6 to fix the position of the guide block 51; 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 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 straightened state; S5. Reverse the wire 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.

[0055] The usage 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. Rotate the wire reel 1 to evenly release the rope 2. Until 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 stop releasing the wire.

[0056] 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 effect 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.

[0057] Start the motor 531, the motor 531 drives the screw 532 to rotate, the screw 532 drives four sprockets to move synchronously through the chain, and then drives four sliders 533 to move in the vertical direction. The sliders 533 drive the fixing plate 52 to move in the vertical direction.

[0058] The convex block 521 moves together with the fixing plate 52. At the moment when the fixing plate 52 moves, the convex block 521 disengages from the first end of the lever 632, and then the counterweight 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, the rack 635 drives the push rod 62 to move, and then pushes 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 relatively small, and only by pushing out the top block 61 can the guiding blocks 51 be limited. After the guiding blocks 51 are fixed, moving the fixing plate 52 drives the rope 2 more stably.

[0059] When adjusting the fixing 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 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 groundwater level monitoring is improved.

[0060] 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. A groundwater level monitoring device, comprising a line release device (1), a rope (2) and a water level measuring instrument (22), wherein the rope (2) is provided with a scale, and is characterized in that: The rope (2) is connected with a guide device (5), and the guide device (5) is used to move the rope (2) in the observation well. The guide device (5) comprises a fixed plate (52), a guide block (51) and an adjustment component (53). The fixed plate (52) is sleeved on the rope (2) and fixedly connected to the rope (2). The guide block (51) is sleeved on the fixed plate (52) and slidably connected to the fixed plate (52). The guide block (51) matches the wall of the observation well, and the adjustment component (53) is connected to the guide block (51). The water level measuring instrument (22) is connected to a floating plate (221), the rope (2) is connected to a tension sensor (21), the tension sensor (21) is arranged between the water level measuring instrument (22) and the fixed plate (52), the guide block (51) is connected to a reinforcement device (6), and the reinforcement device (6) can selectively abut or separate from the inner wall of the observation well; the fixed plate (52) is connected to the adjustment component (53), and the relative position of the fixed plate (52) and the guide block (51) can be adjusted to generate tension on the rope (2) below the fixed plate (52).

2. The underground water level monitoring device according to claim 1, characterized in that: The adjusting component (53) comprises a motor (531), a screw rod (532) and a slider (533); a first slide groove (511) is provided on the inner wall of the guide block (51); the motor (531) is connected to the guide block (51); the screw rod (532) is vertically arranged in the first slide groove (511); one end of the screw rod (532) is rotatably connected to the guide block (51); the other end passes through the guide block (51) and is connected to the motor (531); the slider (533) matches the first slide 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 to the slider (533).

3. The underground water level monitoring device according to claim 2, characterized in that: A linkage cavity (512) is provided in the guide block (51), and a plurality of the sliders (533) and the screw rods (532) are provided. The plurality of screw rods (532) pass through the linkage cavity (512), and a sprocket is sleeved on the screw rod (532). The sprocket is arranged in the linkage cavity (512), and a chain is sleeved on the plurality of sprockets and meshes with the chain, so as to realize synchronous rotation of the plurality of sprockets.

4. The underground water level monitoring device according to claim 1, characterized in that: The reinforcement device (6) comprises a top block (61), a push rod (62) and a driving assembly (63); a placement groove (514) is provided on the outer wall of the guide 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 to the top block (61); the other end of the push rod (62) is connected to the driving assembly (63); the driving assembly (63) is used to enable the push rod (62) to push the top block (61) to abut against the observation well; the driving assembly (63) is connected to the guide block (51).

5. The underground water level monitoring device according to claim 4, characterized in that: The inner wall of the guide block (51) is provided with a second slide groove (513), a movable cavity (515) is provided in the guide block (51), the movable cavity (515) is communicated with the second slide groove (513), the fixed plate (52) is connected with a protrusion (521), the protrusion (521) is arranged in the second slide groove (513) and is slidably connected with the guide block (51); The driving assembly (63) comprises 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 movable cavity (515); the second end of the rotating shaft (631) passes through the guide block (51) and extends into the placement groove (514); the rotating shaft (631) is rotatably connected to the guide block (51); the lever (632) and the counterweight (633) are connected to the gear (634) and the rack (635); The counterweight block (633) is arranged in the movable 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 protrusion (521), the counterweight block (633) is slidably connected to the guide block (51), and the counterweight block (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 placement groove (514), the gear (634) is sleeved on the rotating shaft (631), the rack (635) is slidably connected to the guide block (51), the rack (635) is meshed with the gear (634), and the push rod (62) is connected to the rack (635) to push the top block (61) to move towards the observation well.

6. The underground water level monitoring device according to claim 5, characterized in that: The bottom of the counterweight block (633) is connected to a first magnet (7), and a second magnet (8) connected to the guide block (51) is provided in the movable 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. The counterweight block (633) is provided with a slot (6331). When the first magnet (7) and the second magnet (8) are in contact, the lever (632) extends into the slot (6331), and the top block (61) is in contact with the observation well.

7. The underground water level monitoring device according to claim 5, characterized in that: The length from the end surface 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).

8. The underground water level monitoring device according to claim 1, characterized in that: The wire release device (1) is connected to a bracket (11), the bracket (11) is connected to a limiting assembly (4), the limiting assembly (4) comprises 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 provided on the first wheel (42), a second annular groove is provided on the second wheel (44), the first annular groove and the second annular groove arranged opposite to each other enclose a limiting space, the limiting space is sleeved on the outer periphery of the rope (2), and is used to keep the rope (2) released by the wire release device (1) at the center of the observation well.

9. The underground water level monitoring device according to claim 8, characterized in that: A benchmark (3) is provided on the top surface of the observation well. The benchmark (3) is located below the first rod (41). The benchmark (3) is used to observe the scale of the rope (2).

10. A water level monitoring method for a groundwater level monitoring device, applied to the groundwater level monitoring device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, placing the water level measuring instrument (22) and the guide device (5) in the observation well, and rotating the wire release device (1) to release the rope (2) at a constant speed; S2, the floating plate (221) drives the water level measuring instrument (22) to float on the surface of the groundwater, the water level measuring instrument (22) issues a warning, and the line release is stopped; S3, starting the reinforcement device (6) to fix the position of the guide block (51); S4, starting the adjustment component (53), adjusting the relative position of the fixed plate (52) and the guide block (51), observing the reading of the tension sensor (21), finding the critical value of the sudden increase of the tension sensor (21), adjusting the fixed plate (52) so that the reading of the tension sensor (21) is maintained at the critical value, and at this time, the rope (2) below the fixed plate (52) is in a straight state; S5. Reverse the pay-off device (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).

Images