A groundwater level measurement and early warning device

Abstract

This invention discloses a groundwater level measurement and early warning device. The invention relates to the field of groundwater level measurement technology and includes a placement frame. A fixed plate is fixedly attached to the side wall of the placement frame. A rotating roller is rotatably sleeved on the central axis of the fixed plate. A handle is fixedly attached to the end face of the rotating roller. One end of a fixed frame is fixedly attached to the end face of the fixed plate. The advantages of this invention are: the measuring rope, guided by the traction roller, is restricted from bending, preventing it from bending inside the well pipe. Even under the influence of groundwater flow, the measuring rope will not bend, ensuring it remains vertical and allowing the reading to accurately reflect the actual depth. Simultaneously, the returning measuring rope can be bent, allowing it to be rewound onto the rotating roller, enabling arbitrary control of the rope length. Even if the rope is too long, it is easy to store and carry. Furthermore, the connecting block can be simultaneously fixed as the probe descends, eliminating the need for manual fixing of the connecting block, making it simpler to use and shortening the measurement time.

Description

Technical Field

[0001] This invention relates to the field of groundwater level measurement technology, specifically to a groundwater level measurement and early warning device. Background Technology

[0002] Groundwater is a vital water resource, crucial for water supply, agriculture, and industrial production in many regions. Monitoring and early warning of groundwater level changes allows for timely adjustments to water resource utilization strategies, ensuring the rational use and supply of water resources. Furthermore, insufficient groundwater levels can easily lead to ground collapse, necessitating groundwater level gauges to measure groundwater depth. The existing steel tape level gauge operation involves: fixing the well wall support to the well pipe, turning on the steel tape level gauge, placing the probe of the steel tape level gauge inside the well pipe, and then... Located on the well wall support, open the locking switch and loosen the steel ruler by hand, allowing the probe to gradually descend until it contacts the water surface. At this point, the steel ruler water level gauge emits a beeping alarm sound. Read the scale on the steel ruler at this time, then retrieve the steel ruler and descend it again, taking the reading. Repeat this process three times and take the average value to obtain the height of the groundwater from the ground surface. Continue to descend, during which time the steel ruler water level gauge will continuously emit a beeping alarm sound until the beeping alarm sound turns into a long beeping alarm sound. At this point, read the steel ruler reading again, which is the height of the well bottom from the ground surface.

[0003] A search revealed that Chinese patent CN221425766U discloses a groundwater level measurement and early warning device. While it is applicable to various complex terrains and areas with restricted groundwater flow, improving the accuracy and reliability of measurements, its measurement relies on a lightweight scale rod. However, the length of this lightweight scale rod is limited, making it unsuitable for measuring water levels at greater depths. Using a multi-section splicing method would increase costs and complicate portability. Furthermore, it can only measure the height from the water surface to the ground, failing to estimate the amount of groundwater. Ordinary steel tape level gauges are prone to bending inside the well pipe, and the influence of groundwater flow would further cause the steel tape to bend, making the readings inaccurate to reflect the actual depth. Moreover, both this device and steel tape level gauges require either fixing to the well wall support or pre-adjusting the angle before fixing, making them cumbersome to use. They also cannot be synchronized with the descent of the probe, wasting measurement time and complicating operation. Summary of the Invention

[0004] The purpose of this invention is to provide a groundwater level measurement and early warning device to solve the problems mentioned in the background art, which rely on lightweight graduated rods for measurement. However, the length of lightweight graduated rods is limited and cannot be adapted to water level measurements at greater depths. If multi-section splicing is used, it will lead to increased costs and inconvenience in carrying. At the same time, it can only measure the height from the water surface to the ground and cannot estimate the amount of groundwater. When using ordinary steel tape level gauges, the steel tape is easily bent inside the well pipe, and the steel tape will be further bent due to the influence of groundwater flow, making the reading of the steel tape unable to reflect the actual depth. Moreover, when using this device and steel tape level gauge, either a well wall support needs to be fixed or the angle needs to be adjusted in advance before fixing, making it cumbersome to use. It cannot be synchronized with the descent of the probe, which not only wastes measurement time but also makes the operation complicated.

[0005] To address the problems mentioned in the background section, the present invention provides the following technical solution: a groundwater level measurement and early warning device, comprising a placement frame, a fixed plate fixedly connected to the side wall of the placement frame, a rotating roller rotatably sleeved on the central axis of the fixed plate, a handle fixedly connected to the end face of the rotating roller, one end of a fixed frame fixedly connected to the end face of the fixed plate, and a fastening bolt engaged at the other end of the fixed frame, a measuring rope wound around the outer surface of the rotating roller, a probe installed at the end of the measuring rope, and a groove formed on the side wall of the measuring rope, a limiting block fixedly connected to the side wall of the groove, a first bracket fixedly connected to the top surface of the limiting block, and a second bracket fixedly connected to the bottom surface of the limiting block, the second bracket and the first bracket being staggered, and the second bracket and the first bracket being... A connecting block is provided between the two, and a groove is provided on the side wall of the connecting block. A sliding groove is provided on the side wall of the limiting block. A first channel and a second channel are connected on the end face of the sliding groove. A sealed cavity is provided at the end of the first channel and the second channel. A first piston is slidably sleeved in the sealed cavity. A rod is fixedly connected to the end face of the first piston. A fixing ring is fixedly sleeved on the inner surface of the sliding groove. A positioning groove is provided on the end face of the fixing ring. A guide groove is provided on the outer surface of the fixing ring. A pressure rod is sleeved inside the fixing ring. A top block is fixedly connected to the outer surface of the pressure rod. A toothed rod is slidably sleeved at the end of the pressure rod. A slanted groove is provided at one end of the toothed rod. A second piston is fixedly connected to the other end of the toothed rod. A guide rod is fixedly connected to the end face of the second piston.

[0006] A locking block is fitted into the side wall of the placement rack, a sleeve is fixed to the side wall of the locking block, a connecting block is fixed to the bottom surface of the sleeve, and a through groove is formed through the sleeve and the connecting block. A cavity is formed inside the connecting block, and a traction roller is rotatably connected between the side walls of the cavity. A motor is installed on the side wall of the connecting block, and a drive shaft is fixed to the output end of the motor. The drive shaft is fixed to the end face of the traction roller.

[0007] As a further embodiment of the present invention: the probe is sleeved with the sleeve, the length of the channel is the same as the length of the ruler rope, multiple limiting blocks are provided, and the multiple limiting blocks are evenly distributed about the channel, the connecting block is rotatably connected to the first bracket, and the connecting block is rotatably connected to the second bracket.

[0008] As a further embodiment of the present invention: the insert rod is fitted into the groove, the first channel extends into the first bracket, the second channel extends into the second bracket, the sealed cavity is located in the first bracket and the second bracket, and the insert rod is fitted into the end face of the sealed cavity.

[0009] As a further embodiment of the present invention: the pressure rod extends outside the channel, the top block and the guide rod are both slidably sleeved with the guide groove, and the contact surfaces of the top block and the guide rod are both inclined surfaces. The inclination direction of the positioning groove is the same as the inclination direction of the inclined surface of the guide rod. The lowest point of the top block is higher than the highest point of the toothed rod. A return spring is fixedly connected between the pressure rod and the toothed rod.

[0010] As a further aspect of the present invention: the spacing of the through grooves is equal to the thickness of the ruler rope, and the spacing of the traction rollers is equal to the spacing of the through grooves.

[0011] As a further embodiment of the present invention: a reflux cavity is provided on the side wall of the connecting block, a fan blade is fixedly connected to the outer surface of the transmission shaft, an airtight sleeve is fixedly connected to the bottom surface of the connecting block, a through hole is connected between the airtight sleeve and the reflux cavity, an air outlet is provided on the end face of the reflux cavity, a third piston is slidably sleeved at both ends of the airtight sleeve, one end of a pull rod is fixedly connected to the end face of the third piston, a clamping block is fixedly connected to the other end of the pull rod, a first one-way valve is installed on the outer surface of the airtight sleeve, and a second one-way valve is installed at the bottom end of the through hole.

[0012] As a further embodiment of the present invention: the vent extends outside the connecting block, and the second one-way valve prevents the gas in the return cavity from flowing back into the airtight sleeve.

[0013] As a further aspect of the present invention: the fan blades are provided in multiple ways, and the multiple fan blades are evenly distributed about the central axis of the transmission shaft, and the fan blades are rotatably sleeved with the return cavity.

[0014] Compared with the prior art, the beneficial effects of the present invention, using the above technical solution, are as follows:

[0015] This invention uses a traction roller to compress the pressure bar on the measuring rope, causing the top block on the pressure bar to push the guide rod along the guide groove until the guide rod moves to the positioning groove. At this point, the guide groove releases the constraint on the guide rod, allowing it to rotate under further compression from the top block. This causes the guide rod to slide into the positioning groove, which then blocks the guide rod's return stroke. During the guide rod's movement, it pushes the second piston, which in turn pushes the air in the chute. This air then enters the sealed cavity through the first and second channels, causing the first piston in the sealed cavity to translate. Consequently, the insert rod on the first piston extends out of the sealed cavity and engages with the groove on the connecting block, fixing the first support, the second support, and the connecting block. This, in turn, fixes the adjacent limiting blocks, forming a fixed whole with the limiting blocks via the traction roller. This restricts the measuring rope passing through the traction roller, preventing it from bending inside the well pipe. Even under the influence of groundwater flow, the measuring rope will not bend, ensuring it remains vertical and that the readings accurately reflect the actual depth.

[0016] This invention involves reversing the handle to rotate the roller, causing it to rewind the ruler rope and raise it within the groove. During this upward movement, the traction roller presses the pressure bar a second time, causing the top block on the pressure bar to press against the inclined groove on the toothed rod. This causes the toothed rod to translate and rotate under the pressure of the top block, which in turn drives the guide rod to translate and rotate via the second piston. This causes the guide rod to disengage from the positioning groove and slide back into the adjacent guide groove, thereby releasing the fixation of the guide rod and the second piston. The second piston and the guide rod then reset under the pressure of air within the groove, indirectly resetting the first piston and the insert rod. This releases the fixation of the adjacent limiting block, allowing the returning ruler rope to bend and rewind onto the roller. The length of the ruler rope can be arbitrarily controlled, making it easy to store and carry even if the rope is too long.

[0017] This invention uses fan blades to draw air from the return chamber and discharge it through the air outlet. At this time, the air pressure in the return chamber is lower than the air pressure in the airtight sleeve, causing the air in the airtight sleeve to flow into the return chamber through the second one-way valve. This causes the air pressure in the airtight sleeve to continuously decrease, causing the outside air to push the third piston to contract into the airtight sleeve. In turn, the pull rod on the third piston drives the clamping block to clamp the outer wall of the well pipe, thereby fixing the connecting block and the sleeve. This allows the connecting block to be fixed simultaneously as the probe head descends, eliminating the need for manual fixing of the connecting block, making it simpler to use and shortening the measurement time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a groundwater level measurement and early warning device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the fixing frame structure in an embodiment of the present invention;

[0020] Figure 3 for Figure 1 Enlarged view of the structure of section A in the middle;

[0021] Figure 4 This is a cross-sectional view of the limiting block structure in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the first channel structure in an embodiment of the present invention;

[0023] Figure 6 This is a half-sectional view of the fixing ring structure in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the airtight sleeve structure in an embodiment of the present invention;

[0025] Figure 8 This is a half-sectional schematic diagram of the reflux cavity in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the fixing ring structure in an embodiment of the present invention.

[0027] In the diagram: 1. Placement frame; 2. Fixing plate; 3. Rotating roller; 4. Handle; 5. Fixing frame; 6. Fastening bolt; 7. Ruler rope; 8. Probe head; 9. Channel; 10. Limiting block; 11. First support; 12. Second support; 13. Connecting block; 14. Groove; 15. Slide groove; 16. First channel; 17. Second channel; 18. Sealed cavity; 19. First piston; 20. Insert rod; 21. Fixing ring; 22. Positioning groove; 23. Guide. 24. Slot; 25. Pressure rod; 26. Top block; 27. Toothed rod; 28. Inclined slot; 29. ​​Second piston; 30. Guide rod; 31. Clamping block; 32. Sleeve; 33. Connecting block; 34. Through slot; 35. Cavity; 36. Return chamber; 37. Motor; 38. Drive shaft; 39. Traction roller; 40. Fan blade; 41. Airtight sleeve; 42. Through hole; 43. Air outlet; 44. Third piston; 45. Pull rod; 46. Clamping block; 47. First one-way valve. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0029] Please see Figures 1-6 and Figure 9A groundwater level measurement and early warning device includes a placement frame 1, a fixed plate 2 fixedly connected to the side wall of the placement frame 1, a rotating roller 3 rotatably sleeved on the central axis of the fixed plate 2, a handle 4 fixedly connected to the end face of the rotating roller 3, one end of a fixed frame 5 fixedly connected to the end face of the fixed plate 2, and a fastening bolt 6 engaged at the other end of the fixed frame 5. A measuring rope 7 is wound around the outer surface of the rotating roller 3, a probe 8 is installed at the end of the measuring rope 7, and a groove 9 is formed on the side wall of the measuring rope 7. A limiting block 10 is fixedly connected to the side wall of the groove 9, a first support 11 is fixedly connected to the top surface of the limiting block 10, and a second support 12 is fixedly connected to the bottom surface of the limiting block 10. The second support 12 and the first support 11 are staggered, and a connecting block 13 is provided between the second support 12 and the first support 11. A groove 1 is formed on the side wall of the connecting block 13. 4. A sliding groove 15 is provided on the side wall of the limiting block 10. A first channel 16 and a second channel 17 are connected to the end face of the sliding groove 15. A sealed cavity 18 is provided at the end of both the first channel 16 and the second channel 17. A first piston 19 is slidably sleeved in the sealed cavity 18. An insert rod 20 is fixedly connected to the end face of the first piston 19. A fixing ring 21 is fixedly sleeved on the inner surface of the sliding groove 15. A positioning groove 22 is provided on the end face of the fixing ring 21. A guide groove 23 is provided on the outer surface of the fixing ring 21. A pressure rod 24 is sleeved inside the fixing ring 21. A top block 25 is fixedly connected to the outer surface of the pressure rod 24. A toothed rod 26 is slidably sleeved at the end of the pressure rod 24. A slanted groove 27 is provided at one end of the toothed rod 26. A second piston 28 is fixedly connected to the other end of the toothed rod 26. A guide rod 29 is fixedly connected to the end face of the second piston 28.

[0030] Please see Figure 1 , Figure 3 and Figure 4 The probe head 8 is sleeved with the sleeve 31. The length of the channel 9 is the same as the length of the ruler rope 7. Multiple limiting blocks 10 are provided, and the multiple limiting blocks 10 are evenly distributed about the channel 9. The connecting block 13 is rotatably connected to the first bracket 11 and the connecting block 13 is rotatably connected to the second bracket 12.

[0031] Please see Figure 4 The insert rod 20 is fitted into the groove 14, the first channel 16 extends into the first bracket 11, the second channel 17 extends into the second bracket 12, the sealed cavity 18 is located in the first bracket 11 and the second bracket 12, and the insert rod 20 is fitted into the end face of the sealed cavity 18.

[0032] Please see Figure 3 and Figure 6 The pressure rod 24 extends outside the channel 9. The top block 25 and the guide rod 29 are slidably sleeved with the guide groove 23. The contact surfaces of the top block 25 and the guide rod 29 are both inclined slopes. The inclination direction of the positioning groove 22 is the same as the inclination direction of the inclined slope of the guide rod 29. The lowest point of the top block 25 is higher than the highest point of the toothed rod 26. A return spring is fixed between the pressure rod 24 and the toothed rod 26.

[0033] Specifically, during the process of restricting the bending of the ruler rope 7, while the traction roller 38 pulls the ruler rope 7 down, the traction roller 38 will squeeze the pressure rod 24 on the ruler rope 7, causing the top block 25 on the pressure rod 24 to push the guide rod 29 to move along the guide groove 23 until the guide rod 29 moves to the positioning groove 22. At this time, the constraint of the guide groove 23 on the guide rod 29 is released, causing the guide rod 29 to rotate under the further compression of the top block 25, thereby causing the guide rod 29 to slide into the positioning groove 22, so that the positioning groove 22 blocks the return of the guide rod 29. During the movement of the guide rod 29, the guide rod 29 will push the second piston 28 to move, causing the second piston 28 to push the air in the slide groove 15, thereby allowing the air to pass through. The first channel 16 and the second channel 17 enter the sealed cavity 18, causing the first piston 19 in the sealed cavity 18 to translate. This causes the insert rod 20 on the first piston 19 to extend out of the sealed cavity 18 and engage with the groove 14 on the connecting block 13, thus fixing the first support 11, the second support 12, and the connecting block 13. This fixes the adjacent limiting block 10, making the limiting block 10 through the traction roller 38 form a fixed whole. This restricts the ruler 7 through the traction roller 38 from bending, preventing the ruler 7 from bending inside the well pipe. Even if affected by groundwater flow, the ruler 7 will not bend, keeping it always vertical and ensuring that the reading of the ruler 7 accurately reflects the actual depth. Example 2

[0034] Please see Figure 1 , Figure 7 and Figure 8 A groundwater level measurement and early warning device includes a locking block 30 fitted into the side wall of a mounting frame 1, a sleeve 31 fixedly connected to the side wall of the locking block 30, a connecting block 32 fixedly connected to the bottom surface of the sleeve 31, and a through groove 33 extending through the sleeve 31 and the connecting block 32. A cavity 34 is formed inside the connecting block 32, and a traction roller 38 is rotatably connected between the side walls of the cavity 34. A motor 36 is installed on the side wall of the connecting block 32, and a drive shaft 37 is fixedly connected to the output end of the motor 36. The drive shaft 37 is fixedly connected to the end face of the traction roller 38.

[0035] Please see Figure 7 and Figure 8 The spacing of the through grooves 33 is equal to the thickness of the ruler rope 7, and the spacing of the traction rollers 38 is equal to the spacing of the through grooves 33.

[0036] Specifically, during the recovery of the measuring rope 7 and the probe head 8, the handle 4 is rotated in the opposite direction to reverse the rotation roller 3, causing the roller 3 to rewind the measuring rope 7 and raise the measuring rope 7 in the through groove 33. During the rise of the measuring rope 7, the traction roller 38 will squeeze the pressure rod 24 a second time, causing the top block 25 on the pressure rod 24 to squeeze the inclined groove 27 on the toothed rod 26. This causes the toothed rod 26 to translate and further rotate under the pressure of the top block 25, thereby causing the toothed rod 26 to drive the guide rod 29 to translate and rotate through the second piston 28. The guide rod 29 disengages from the positioning groove 22 and slides back into the adjacent guide groove 23, thereby releasing the fixation of the guide rod 29 and the second piston 28. This allows the second piston 28 and the guide rod 29 to reset under the compression of air in the slide groove 15, indirectly resetting the first piston 19 and the insert rod 20. This releases the fixation of the adjacent limiting block 10, allowing the return ruler rope 7 to be bent, thus allowing the ruler rope 7 to be rewound onto the rotating roller 3. This allows the length of the ruler rope 7 to be arbitrarily controlled, making it easy to store and carry even if the ruler rope 7 is too long. Example

[0037] Please see Figure 7 and Figure 8 A groundwater level measurement and early warning device includes a return cavity 35 on the side wall of a connecting block 32, a fan blade 39 fixedly connected to the outer surface of a drive shaft 37, an airtight sleeve 40 fixedly connected to the bottom surface of the connecting block 32, a through hole 41 connecting the airtight sleeve 40 and the return cavity 35, an air outlet 42 on the end face of the return cavity 35, a third piston 43 slidably sleeved at both ends of the airtight sleeve 40, a pull rod 44 fixedly connected to one end of the end face of the third piston 43, a clamping block 45 fixedly connected to the other end of the pull rod 44, a first one-way valve 46 installed on the outer surface of the airtight sleeve 40, and a second one-way valve installed at the bottom end of the through hole 41.

[0038] Please see Figure 8 The vent 42 extends to the outside of the connecting block 32, and the second one-way valve prevents the gas in the return chamber 35 from flowing back into the airtight sleeve 40.

[0039] Please see Figure 8 Multiple fan blades 39 are provided, and the multiple fan blades 39 are evenly distributed about the central axis of the drive shaft 37. The fan blades 39 are rotatably sleeved with the return cavity 35.

[0040] Specifically, during the descent of the probe head 8, the motor 36 on the connecting block 32 is activated, causing the motor 36 to drive the traction roller 38 to rotate via the drive shaft 37. This causes the traction roller 38 to pull the measuring rope 7 down, resulting in the probe head 8 at the end of the measuring rope 7 descending along the well casing. During the rotation of the drive shaft 37, the fan blades 39 on the drive shaft 37 rotate synchronously with the drive shaft 37, causing the fan blades 39 to draw air from the return chamber 35 and discharge it from the air outlet 42. At this time, the air pressure in the return chamber 35 is lower than the air pressure in the airtight sleeve 40. This causes the air in the airtight sleeve 40 to flow into the return chamber 35 through the second one-way valve, thereby causing the air pressure in the airtight sleeve 40 to continuously decrease. This causes the outside air to push the third piston 43 to contract inward into the airtight sleeve 40, which in turn causes the pull rod 44 on the third piston 43 to drive the clamping block 45 to clamp the outer wall of the well pipe, thereby achieving the purpose of fixing the connecting block 32 and the sleeve 31. This allows the connecting block 32 to be fixed simultaneously as the probe head 8 descends, eliminating the need for manual fixing of the connecting block 32, making it easier to use and shortening the measurement time.

[0041] The working principle and usage process of this invention are as follows: When it is necessary to measure the groundwater level, place the placement frame 1 in the designated position, and then pull up the sleeve 31 so that the locking block 30 on the sleeve 31 is disengaged from the placement frame 1. At this time, separate the probe head 8 and the sleeve 31, and insert the ruler rope 7 on the probe head 8 into the through groove 33 so that the ruler rope 7 is located between the traction rollers 38. Then rotate the fastening bolt 6 on the fixing frame 5 so that the fastening bolt 6 is disengaged from the rotating roller 3, thereby releasing the fixation of the rotating roller 3. Then move the sleeve 31 and the connecting block 32 so that the pull rod 44 and the clamping block 45 on the connecting block 32 are located on both sides of the well pipe.

[0042] After the above operations are completed, the motor 36 on the connecting block 32 is started, causing the motor 36 to drive the traction roller 38 to rotate via the drive shaft 37. This causes the traction roller 38 to pull the measuring rope 7 down, causing the probe head 8 at the end of the measuring rope 7 to descend along the well casing. During the rotation of the drive shaft 37, the fan blades 39 on the drive shaft 37 rotate synchronously with the drive shaft 37, causing the fan blades 39 to draw air from the return chamber 35 and discharge it from the air outlet 42. At this time, the air pressure in the return chamber 35 is lower than the air pressure in the airtight sleeve 40, causing the air... Air in the airtight sleeve 40 flows into the return chamber 35 through the second one-way valve, causing the air pressure in the airtight sleeve 40 to continuously decrease. This causes the outside air to push the third piston 43 to contract into the airtight sleeve 40, which in turn causes the pull rod 44 on the third piston 43 to drive the clamping block 45 to clamp the outer wall of the well pipe, thereby achieving the purpose of fixing the connecting block 32 and the sleeve 31. This allows the connecting block 32 to be fixed simultaneously as the probe head 8 descends, eliminating the need for manual fixing of the connecting block 32, making it easier to use and shortening the measurement time.

[0043] During the above process, while the traction roller 38 pulls the ruler rope 7 down, the traction roller 38 also squeezes the pressure rod 24 on the ruler rope 7, causing the top block 25 on the pressure rod 24 to push the guide rod 29 along the guide groove 23 until the guide rod 29 moves to the positioning groove 22. At this time, the guide groove 23 releases the constraint on the guide rod 29, causing the guide rod 29 to rotate under the further pressure of the top block 25, thus causing the guide rod 29 to slide into the positioning groove 22, making the positioning groove 22 block the return of the guide rod 29. During the movement of the guide rod 29, the guide rod 29 pushes the second piston 28 to move, causing the second piston 28 to push the air in the slide groove 15, thus allowing the air to pass through the first channel 16. The first piston 19 in the sealed cavity 18 is moved into the second channel 17, causing the first piston 19 in the sealed cavity 18 to translate. This causes the insert rod 20 on the first piston 19 to extend out of the sealed cavity 18 and engage with the groove 14 on the connecting block 13, thus fixing the first support 11, the second support 12, and the connecting block 13. This fixes the adjacent limiting block 10, making the limiting block 10 through the traction roller 38 a fixed whole. This restricts the ruler 7 through the traction roller 38 from bending, preventing the ruler 7 from bending inside the well pipe. Even if affected by groundwater flow, the ruler 7 will not bend, keeping it always vertical, so that the reading of the ruler 7 can accurately reflect the actual depth.

[0044] When it is necessary to retrieve the measuring rope 7 and the probe head 8, the handle 4 is used to reverse the rotation of the roller 3, causing the roller 3 to rewind the measuring rope 7 and raise the measuring rope 7 in the through groove 33. During the rise of the measuring rope 7, the traction roller 38 will squeeze the pressure rod 24 a second time, causing the top block 25 on the pressure rod 24 to squeeze the inclined groove 27 on the toothed rod 26. This causes the toothed rod 26 to translate and rotate further under the pressure of the top block 25. As a result, the toothed rod 26 drives the guide rod 29 to translate and rotate through the second piston 28, so that the guide rod 29 and the guide rod 29... The positioning groove 22 disengages and slides back into the adjacent guide groove 23, thereby releasing the fixation of the guide rod 29 and the second piston 28. This allows the second piston 28 and the guide rod 29 to reset under the compression of air in the slide groove 15, indirectly resetting the first piston 19 and the insert rod 20. This releases the fixation of the adjacent limiting block 10, allowing the return ruler rope 7 to be bent. This allows the ruler rope 7 to be rewound onto the rotating roller 3, making the length of the ruler rope 7 arbitrarily controllable. Even if the ruler rope 7 is too long, it is easy to store and carry, thus completing the operation.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A groundwater level measurement and early warning device, characterized in that, The device includes a placement rack (1), a fixed plate (2) fixed to the side wall of the placement rack (1), a rotating roller (3) rotatably sleeved on the central axis of the fixed plate (2), a handle (4) fixed to the end face of the rotating roller (3), one end of a fixed frame (5) fixed to the end face of the fixed plate (2), and a fastening bolt (6) meshing with the other end of the fixed frame (5). A ruler rope (7) is wound around the outer surface of the rotating roller (3), a probe (8) is installed at the end of the ruler rope (7), and a groove (9) is opened on the side wall of the ruler rope (7). A limiting block (10) is fixed to the side wall of the groove (9). A first bracket (11) is fixedly connected to the top surface of the limiting block (10), and a second bracket (12) is fixedly connected to the bottom surface of the limiting block (10). The second bracket (12) and the first bracket (11) are staggered, and a connecting block (13) is provided between the second bracket (12) and the first bracket (11). A groove (14) is provided on the side wall of the connecting block (13). A sliding groove (15) is provided on the side wall of the limiting block (10). A first channel (16) and a second channel (17) are connected on the end face of the sliding groove (15). A dense groove is provided at the end of both the first channel (16) and the second channel (17). A closed cavity (18) is provided, in which a first piston (19) is slidably sleeved. A rod (20) is fixedly connected to the end face of the first piston (19). A fixing ring (21) is fixedly sleeved on the inner surface of the sliding groove (15). A positioning groove (22) is provided on the end face of the fixing ring (21). A guide groove (23) is provided on the outer surface of the fixing ring (21). A pressure rod (24) is sleeved inside the fixing ring (21). A top block (25) is fixedly connected to the outer surface of the pressure rod (24). A toothed rod (26) is slidably sleeved at the end of the pressure rod (24). A slanted groove is provided at one end of the toothed rod (26). (27) The other end of the rack (26) is fixedly connected to a second piston (28), and a guide rod (29) is fixedly connected to the end face of the second piston (28); the pressure rod (24) extends to the outside of the channel (9), the top block (25) and the guide rod (29) are both slidably connected to the guide groove (23), and the contact surfaces of the top block (25) and the guide rod (29) are both inclined slopes. The inclination direction of the positioning groove (22) is the same as the inclination direction of the inclined slope of the guide rod (29). The lowest point of the top block (25) is higher than the highest point of the rack (26). A return spring is fixedly connected between the pressure rod (24) and the rack (26). A locking block (30) is fitted into the side wall of the placement frame (1). A sleeve (31) is fixed to the side wall of the locking block (30). A connecting block (32) is fixed to the bottom surface of the sleeve (31). A through groove (33) is opened through the sleeve (31) and the connecting block (32). A cavity (34) is opened inside the connecting block (32). A traction roller (38) is rotatably connected between the side walls of the cavity (34). A motor (36) is installed on the side wall of the connecting block (32). A drive shaft (37) is fixed to the output end of the motor (36). The drive shaft (37) is fixed to the end face of the traction roller (38). A return cavity (35) is provided on the side wall of the connecting block (32). A fan blade (39) is fixed to the outer surface of the drive shaft (37). An airtight sleeve (40) is fixed to the bottom surface of the connecting block (32). A through hole (41) is connected between the airtight sleeve (40) and the return cavity (35). An air outlet (42) is provided on the end face of the return cavity (35). A third piston (43) is slidably sleeved at both ends of the airtight sleeve (40). One end of a pull rod (44) is fixed to the end face of the third piston (43). A clamping block (45) is fixed to the other end of the pull rod (44). A first one-way valve (46) is installed on the outer surface of the airtight sleeve (40). A second one-way valve is installed at the bottom end of the through hole (41). The vent (42) extends to the outside of the connecting block (32), and the second one-way valve prevents the gas in the return chamber (35) from flowing back into the airtight sleeve (40); The fan blades (39) are provided in multiple ways, and the multiple fan blades (39) are evenly distributed about the central axis of the transmission shaft (37). The fan blades (39) are rotatably sleeved with the return cavity (35).

2. The groundwater level measurement and early warning device according to claim 1, characterized in that: The probe (8) is sleeved with the sleeve (31), the length of the channel (9) is the same as the length of the ruler rope (7), multiple limiting blocks (10) are provided, and the multiple limiting blocks (10) are evenly distributed about the channel (9), the connecting block (13) is rotatably connected to the first bracket (11), and the connecting block (13) is rotatably connected to the second bracket (12).

3. The groundwater level measurement and early warning device according to claim 1, characterized in that: The insert rod (20) is fitted into the groove (14), the first channel (16) extends into the first bracket (11), the second channel (17) extends into the second bracket (12), the sealed cavity (18) is located in the first bracket (11) and the second bracket (12), and the insert rod (20) is fitted into the end face of the sealed cavity (18).

4. The groundwater level measurement and early warning device according to claim 1, characterized in that: The spacing of the through grooves (33) is equal to the thickness of the ruler rope (7), and the spacing of the traction rollers (38) is equal to the spacing of the through grooves (33).

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