Portable well water level depth measurer

Abstract

The utility model provides a portable well water level depth measurer, which comprises a retractable unit and a measuring unit, one end of the measuring rope is wound and connected to the winding and unwinding unit, and the other end of the measuring rope is connected with a counter weight; the floating plate is arranged on the measuring rope in a sleeving manner; one end of the elastic limiting piece is fixedly connected to the lower surface of the floating plate, and the other end of the elastic limiting piece abuts against the surface of the measuring rope to generate friction force; the floating force borne by the floating plate on the water surface of the water well is larger than the friction force between the elastic limiting piece and the measuring rope, and the weight of the counter weight is larger than the friction force between the elastic limiting piece and the measuring rope, so that the floating plate floats on the water surface when the measuring rope is lowered. The counter weight can sink in water until the counter weight makes contact with the well bottom, and the length of the measuring rope between the floating plate and the counter weight is kept unchanged. The measuring device provided by the utility model is simple and convenient to operate, the accuracy of measuring the water level in the water well can be improved, the quantity of disinfection powder needing to be put is further accurately calculated, and the disinfection effect on a water source in the water well is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water level depth measurement, in particular to a portable water well water level depth measuring device. Background Art

[0002] After a typhoon and flood disaster, health professionals need to disinfect the wells. In order to achieve the expected disinfection effect, the amount of disinfectant powder to be added needs to be determined based on the volume of water in the well. The volume of water needs to be calculated by measuring the circumference of the well, the depth of the well, and the height of the water level in the well.

[0003] In order to conveniently measure the depth of the water level in a well, the prior art has made many improvements to the water level depth measuring device. The patent with the publication number CN217403550U discloses a portable and simple device for measuring groundwater level, including a disc box, a tape measure and a measuring clock; the tape measure is wound on the reel of the disc box, and the bottom end is fixed to the reel, and the other end has an upper clamp ring; the measuring clock is a cylindrical structure with a closed top and an open bottom, and the closed end of the measuring clock is also fixedly connected to a lower clamp ring, and the lower clamp ring and the upper clamp ring are buckled and connected, so that the disc box and the tape measure are connected to the measuring clock, and the measuring clock is placed in the borehole or well mouth where the water level needs to be measured by retracting and releasing the length of the tape measure, and the water level is measured; by retracting and releasing the tape measure multiple times, the measuring clock is constantly changed up and down near the water surface, and the depth of the water level can be more accurately judged. The measuring device proposed by the utility model has a simple structure, convenient operation, and is easy to carry, and is suitable for measuring groundwater level.

[0004] However, the above prior art still has the following shortcomings in actual operation:

[0005] The measuring clock is placed into the groundwater through a tape measure, and the scale value on the tape measure is read to achieve the effect of measuring the depth of the groundwater level. However, if the water level in the well is low and the depth of the well is deep, the position of the tape measure immersed in the water cannot be confirmed by visual inspection, resulting in inaccurate measurement of the water level depth in the well, and then inaccurate calculation of the volume of water in the well. As a result, the calculation result of the amount of disinfectant powder to be added will be inaccurate, so the expected disinfection effect cannot be achieved for the water source in the well. Therefore, in this field, there is an urgent need to improve the portable well water level depth measuring device to solve the defects of the existing technology. Summary of the invention

[0006] In view of the deficiencies in the prior art, the main purpose of the utility model is to provide a portable water well water level depth measuring device, which is easy to operate, can improve the accuracy of water level measurement in the well, and then accurately calculate the amount of disinfectant powder required to be added, thereby improving the disinfection effect of the water source inside the well.

[0007] The technical solution of the utility model is as follows:

[0008] A portable well water level depth measuring device comprises: a retractable unit; a measuring rope, one end of which is wound and connected to the retractable unit, and the other end is connected to a counterweight, and the counterweight can sink into the water; a floating board, a through hole is provided at the center of the floating board, and the floating board is sleeved on the measuring rope through the through hole; at least one elastic limiting plate, one end of which is fixedly connected to the lower surface of the floating board, and the other end abuts against the surface of the measuring rope to generate friction; and the buoyancy of the floating board on the water surface of the well is greater than the friction between the elastic limiting plate and the measuring rope, and the weight of the counterweight is greater than the friction between the elastic limiting plate and the measuring rope, so that when the measuring rope is lowered, the floating board floats on the water surface, the counterweight can sink in the water until it contacts the bottom of the well, and the length of the measuring rope between the floating board and the counterweight is kept unchanged; and the friction between the elastic limiting plate and the measuring rope is greater than the sum of the weights of the floating board and at least one elastic limiting plate, so that when the measuring rope is lifted, the floating board rises synchronously without sliding down.

[0009] In some embodiments, the reel unit includes: a reel; a reel shaft, the reel shaft is rotatably arranged on the reel, and the measuring rope is wound on the reel shaft; a handle, the handle is fixedly connected to the reel shaft and is used to rotate the reel shaft during measurement; a reel frame, one end of the reel frame is rotatably connected to the reel; a limit bar, the limit bar is arranged on both sides of the reel, and when the reel frame is unfolded, the limit bar can fix and support the position of the reel frame; a guide wheel, the guide wheel is arranged at one end of the reel frame away from the reel, and the guide wheel is equipped with a rotating shaft, which can guide the reeling and releasing of the measuring rope.

[0010] In some embodiments, the retractable unit further includes a hand-held handle, which is fixedly disposed on the reel and is used for holding the hand-held handle during measurement or for carrying the device when not measuring.

[0011] In some embodiments, the retracting unit further includes magnet one and magnet two, wherein magnet one is fixedly mounted on the outer side of the reel, and magnet two is fixedly mounted on the inner side of the reel. When the reel is retracted, the positions of magnet one and magnet two correspond to each other, and the reel is fixed by adsorption.

[0012] In some embodiments, the winding frame includes support rod one and support rod two, one end of support rod one and support rod two are respectively rotatably connected to the two side surfaces of the winding disk, the guide wheel is installed on the other end of support rod one and support rod two, and the rotating shaft of the guide wheel is rotatably connected to support rod one and support rod two.

[0013] In some embodiments, the elastic limiting piece is L-shaped and its bending angle is greater than 90 degrees.

[0014] In some embodiments, the end of the L-shaped elastic limiting piece that abuts against the measuring rope presents an inwardly concave arc surface, and the inwardly concave arc surface integrally matches the surface of the measuring rope.

[0015] In some embodiments, the at least one elastic limiting piece includes 3 to 4 groups of elastic limiting pieces, which are evenly distributed around the through holes of the floating board.

[0016] In some embodiments, the floating board is a circular plastic board or foam board with a diameter of 15 cm and a thickness of 4 cm.

[0017] In some embodiments, a threaded column is provided at one end of the measuring rope for connecting to a counterweight, a threaded hole is provided at the center of the counterweight, and the measuring rope is threadedly connected to the threaded hole of the counterweight via the threaded column.

[0018] The utility model provides a portable water well water level depth measuring device, which overcomes the shortcomings of the prior art and can accurately measure the water level in the well. The beneficial effects of the utility model are:

[0019] (1) The portable well water level depth measuring device provided by the utility model is provided with a floating plate and an elastic limiting plate. When the water level depth in the well needs to be measured, a counterweight and part of the measuring rope are placed in the well through a retracting unit. Since the buoyancy of the floating plate is greater than the friction between the elastic limiting plate and the measuring rope, the floating plate floats on the liquid surface. Since the weight of the counterweight is greater than the friction between the elastic limiting plate and the measuring rope, the counterweight will continue to sink. When the counterweight reaches the bottom of the well, the measuring rope will not continue to move downward due to the limitation of the measuring rope by the elastic limiting plate, and the length of the measuring rope between the counterweight and the floating plate remains unchanged. The retracting unit is rotated in the opposite direction to reel in the measuring rope. Since the limitation of the elastic limiting plate, the friction between the elastic limiting plate and the measuring rope is greater than the total weight of the floating plate and the elastic limiting plate, the floating plate rises at the same time without sliding down. The distance between the floating plate and the counterweight is measured to be the water level depth in the well, thereby improving the accuracy of the water level measurement in the well, and then accurately calculating the amount of disinfectant powder required, thereby improving the disinfection effect of the water source inside the well.

[0020] (2) The portable water well water level depth measuring device provided by the utility model is provided with a winding frame and a guide wire wheel. The winding frame can extend the release position of the measuring rope, and the measuring rope is released and wound along the middle of the water well to prevent the floating plate and the counterweight from hitting the side wall of the water well. The guide wire wheel guides the measuring rope to prevent the measuring rope from getting tangled.

[0021] (3) The portable well water level depth measuring device provided by the utility model is provided with a limit bar, magnet one and magnet two. When the measuring rope is released, the limit bar limits the position of the winding frame. When measurement is not needed, the winding frame is rotated for storage, which makes it easy to carry the entire measuring device. After the winding frame is wound up, magnet one and magnet two are attracted to each other. At this time, the guide wheel can serve as a handle, thereby improving the portability of the entire device.

[0022] It should be understood that the implementation of any embodiment of the present utility model does not mean that multiple or all of the above-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0024] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0026] Figure 2 This is a schematic structural diagram of a floating plate and an elastic limiting plate according to an embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of a retractable unit according to an embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the reel-in unit after the reel-in rack is stored in one embodiment of the utility model;

[0029] Figure 5 The figure is a schematic structural diagram of a counterweight according to an embodiment of the utility model.

[0030] Markings in the figure:

[0031] 1. Measuring rope; 2. Retracting and releasing unit; 3. Counterweight; 4. Floating plate; 5. Elastic limit plate; 6. Reel; 7. Reel; 8. Handle; 9. Reel frame; 10. Guide wheel; 11. Limit strip; 12. Magnet 1; 13. Magnet 2; 14. Handle; 15. Threaded column; 91 support rod 1; 92 support rod 2.

[0032] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in combination with the embodiment and the drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0036] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific direction, be constructed or operate in a specific direction, and cannot be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] The implementation of the present invention is described in detail below in conjunction with preferred implementation modes.

[0039] like Figure 1 , Figure 2 As shown, the utility model provides a portable well water level depth measuring device, which mainly includes a measuring rope 1, a retracting unit 2, a counterweight 3, a floating plate 4 and a plurality of elastic limiting plates 5.

[0040] The measuring rope 1 is wound and connected to the retracting unit 2, and the retracting unit 2 can retract and control the release length of the measuring rope 1 to achieve the measurement of different water depths. The counterweight 3 is connected to the end of the measuring rope 1 away from the retracting unit 2. The floating plate 4 is provided with a through hole, and is sleeved on the measuring rope 1 through the through hole. One end of a plurality of elastic limit plates 5 is fixedly connected to the lower surface of the floating plate 4, and the other end abuts against the surface of the measuring rope 1.

[0041] It should be noted that the multiple elastic limit plates 5 are in contact with the measuring rope 1, the friction between the elastic limit plates 5 and the measuring rope 1 is less than the buoyancy of the floating plate 4, the friction between the multiple elastic limit plates 5 and the measuring rope 1 is greater than the sum of the weights of the floating plate 4 and the multiple elastic limit plates 5, and the friction between the multiple elastic limit plates 5 and the measuring rope 1 is less than the weight of the counterweight 3. It is easy to understand that the tightness of the contact between the multiple elastic limit plates 5 and the measuring rope 1 can be flexibly adjusted as needed to meet the above force relationship. The elastic limit plates 5 can be made of shape memory alloy. The floating plate 4 can be made of a round plastic plate or foam plate with a diameter of 15-20cm and a thickness of 3-5cm. It is preferably made of a diameter of 15cm and a thickness of 4cm. It only needs to ensure that it can gradually float to the water surface and remain still after entering the water.

[0042] When it is necessary to measure the water level depth in the well, the floating board 4 is mounted on the measuring rope 1. One end of the measuring rope 1 is connected to the counterweight 3, which can be an iron plumb bob or other materials, as long as it can sink to the bottom of the water after entering the water. The floating board 4 is located above the counterweight 3, and the elastic limit plate 5 is in contact with the measuring rope 1. The measuring rope 1 is released through the retracting unit 2, and the counterweight 3 is placed in the well. When the floating board 4 contacts the liquid surface, the floating board 4 will be affected by the buoyancy of the liquid surface. Since this buoyancy is greater than the friction between the multiple elastic limit plates 5 and the measuring rope 1, the floating board 4 will not continue to sink as the measuring rope 1 is lowered, but will just float on the water surface. Since the friction between the multiple elastic limiting pieces 5 and the measuring rope 1 is less than the weight of the counterweight 3, and the buoyancy of the counterweight 3 in the water can be ignored, when the retracting unit 2 continues to release the measuring rope 1, the counterweight 3 drives the measuring rope 1 to continue to move downward, but the floating plate 4 will not move downward, and the floating plate 4 will float on the water surface. When the counterweight 3 reaches the bottom of the well, the retracting unit 2 stops releasing the measuring rope 1. Even if the measuring rope 1 is continued to be released at this time, due to the limit of the measuring rope 1 by the elastic limiting piece 5, there is friction between the elastic limiting piece 5 and the measuring rope 1, and the measuring rope 1 will not continue to move downward. That is to say, when the counterweight 3 reaches the bottom of the well, the length of the measuring rope 1 between the counterweight 3 and the floating plate 4 will remain unchanged. When it is necessary to lift the measuring rope 1 and the counterweight 3, the measuring rope 1 is reeled in by rotating the retracting unit 2 in the opposite direction. Since the friction between the multiple elastic limiting pieces 5 and the measuring rope 1 is greater than the sum of the weights of the floating plate 4 and the multiple elastic limiting pieces 5, when the measuring rope 1 is lifted, the floating plate 4 rises at the same time, and due to the limitation of the elastic limiting pieces 5, the position of the floating plate 4 on the measuring rope 1 will not change at this time. When the measuring rope 1 is completely taken out of the well, the distance between the floating plate 4 and the counterweight 3 (that is, the length of the measuring rope 1 between the two) is the water level depth in the well. It can be seen that this measurement method can improve the accuracy of the water level measurement in the well, and then accurately calculate the amount of disinfectant powder required, improve the disinfection effect of the water source inside the well, and the whole process is easy to operate.

[0043] It should be noted that if Figure 2 As shown, the elastic stopper 5 is L-shaped and its bending angle is greater than 90 degrees. One end of the L-shape is fixed to the lower surface of the floating board 4, and the other end of the L-shape abuts against the surface of the measuring rope 1. By designing a bending angle greater than 90 degrees, the measuring rope 1 is relatively easy to lower when the counterweight 3 is lowered, and it is helpful to prevent the floating board 4 from sliding down when the counterweight 3 is lifted.

[0044] Continue to see Figure 2 The end of the L-shaped elastic limiting piece 5 that abuts against the surface of the measuring rope 1 is designed to be a concave arc surface, and the concave arc surface as a whole matches the surface of the measuring rope 1, so that it is convenient to fully contact with the surface of the measuring rope 1 and achieve close abutment.

[0045] See also Figure 3 The reeling unit 2 includes a reel 6 , a reel shaft 7 , a reel frame 9 , a limit strip 11 and a guide wheel 10 .

[0046] The reel 7 is rotatably arranged in the middle of the reel 6, and the measuring rope 1 is wound on the reel 7. One end of the reel 9 is rotatably connected to the reel 6, such as being hinged to the reel 6. During measurement, the reel 9 is unfolded forward to extend the release position of the measuring rope 1, so that the measuring rope 1 is released and reeled along the middle of the well, preventing the floating plate 4 and the counterweight 3 from hitting the side wall of the well and being damaged. When the measurement is completed, the reel 9 is retracted to reduce the volume of the entire retracting unit 2 and improve the portability of the overall device. The limit strips 11 are arranged on both sides of the reel 6. When the reel 9 is unfolded, the limit strips 11 can fix the position of the reel 9 and play a role in supporting the reel 9. The guide wheel 10 is arranged at one end of the reel 9 away from the reel 6, and the guide wheel 10 is equipped with a rotating shaft. The measuring rope 1 is released after passing through the rotating shaft of the guide wheel 10, and the measuring rope 1 can be guided and retracted to prevent knotting.

[0047] See also Figure 3 The retracting unit 2 also includes a handle 8, which is fixedly connected to one side of the reel. When measuring, the reel is rotated by rotating the handle 8 to make it rotate synchronously, which is convenient for operation and realizes the retracting and releasing of the measuring rope.

[0048] See also Figure 4 The retracting unit 2 also includes a handheld handle 14, which is fixedly arranged on the other side of the reel 6 away from the handle 8. When measuring, the handheld handle 14 is held by hand and the handle 8 is turned to release and reel the measuring rope 1.

[0049] Continue to see Figure 3 The retracting unit 2 further includes a magnet 12 and a magnet 13. The magnet 12 is fixedly arranged on the outer side of the reel 6, and the magnet 13 is fixedly arranged on the inner side of the reel 9 away from the reel 6. When the measurement is completed, the reel 9 is retracted, and the positions of the magnet 12 and the magnet 13 correspond to each other and are adapted to be adsorbed. At this time, the wire wheel 10 can act as a handle to improve the portability of the overall device.

[0050] Continue to see Figure 3 , Figure 4 The winding frame 9 includes a support rod 1 91 and a support rod 2 92. One ends of the support rod 1 91 and the support rod 2 92 are rotatably connected to the two side surfaces of the winding disk 6 respectively. The guide wheel 10 is installed on the other ends of the support rod 1 91 and the support rod 2 92. The rotating shaft of the guide wheel 10 is rotatably connected to the support rod 1 91 and the support rod 2 92. The measuring rope 1 is released after passing through the rotating shaft of the guide wheel 10, which can guide the measuring rope 1 to be retracted and released, making the retraction and release smoother and preventing knotting.

[0051] See also Figure 2 The multiple elastic limiting plates 5 are preferably designed to be 3 or 4 groups, which are evenly distributed around the through holes of the floating board 5 and fixed to the lower surface of the floating board 4. The other ends of the multiple elastic limiting plates 5 are tightly abutted against the measuring rope 1. The friction force between the multiple elastic limiting plates 5 and the measuring rope 1 can control the stability of the floating board 4 and limit and fix the length of the measuring rope 1 underwater.

[0052] See also Figure 5 The measuring rope 1 is provided with a threaded column 15 at one end for connecting the counterweight 3, and a threaded hole is provided in the middle of the counterweight 3, and the two are threadedly connected, which is convenient for disassembly and replacement of the counterweight 3. The counterweight 3 is gyro-shaped, and the bottom is pointed, which is convenient for stable sinking after entering the water.

[0053] The specific operation method in this embodiment is as follows: when the surveyor uses the measuring device, he first installs the floating plate 4 and the counterweight 3. After the installation is completed, he comes to the side of the water well, unfolds the winding frame 9 and uses the limit strip 11 to fix and support the position, holds the hand-held handle 14 with one hand, and releases and reels the measuring rope 1 by turning the handle 8 with the other hand. After reaching a stable state, the measuring device is completely taken out of the water well, and the distance between the floating plate 4 and the counterweight 3 (that is, the length of the measuring rope 1 between the two) is measured as the water level depth in the water well. After the measurement is completed, the floating plate 4 and the counterweight 3 can be disassembled for easy carrying. The surveyor can also replace the counterweight 3 according to the actual situation to improve the applicability of the overall device. It can be seen that the measuring device of the utility model can improve the accuracy of the water level measurement in the water well, and then accurately calculate the amount of disinfectant powder required to be put in, thereby improving the disinfection effect of the water source inside the water well.

[0054] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

[0055] Although several specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present invention. Certain features described in the context of a separate embodiment may also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation may also be implemented in multiple implementations individually or in any suitable sub-combination.

Claims

1. A portable well water level depth measuring device, characterized in that: include: Retractable unit; A measuring rope, one end of which is wound around the retractable unit and connected to a counterweight at the other end, and the counterweight can be submerged in water; A floating plate, wherein a through hole is provided at the center of the floating plate, and during measurement, the floating plate is sleeved on the measuring rope through the through hole; at least one elastic limiting piece, one end of which is fixedly connected to the lower surface of the floating plate, and the other end of which abuts against the surface of the measuring rope to generate friction; and The buoyancy of the floating board on the water surface of the well is greater than the friction between the elastic limiting plate and the measuring rope, and the weight of the counterweight is greater than the friction between the elastic limiting plate and the measuring rope, so that when the measuring rope is lowered, the floating board floats on the water surface, and the counterweight can sink in the water until it touches the bottom of the well, and the length of the measuring rope between the floating board and the counterweight remains unchanged; and The friction force between the elastic limiting plate and the measuring rope is greater than the total weight of the floating plate and at least one elastic limiting plate, so that when the measuring rope is lifted, the floating plate rises synchronously without sliding down.

2. The portable well water level depth measuring device according to claim 1, characterized in that: The retractable unit comprises: Reel; A reel, the reel is rotatably disposed through the reel, and the measuring rope is wound around the reel; A handle, the handle is fixedly connected to the winding shaft and is used to rotate the winding shaft during measurement; A winding frame, one end of which is rotatably connected to the winding disc; Limiting bars, which are arranged on two sides of the winding disc, and when the winding frame is unfolded, the limiting bars can fix and support the position of the winding frame; The guide wheel is arranged at one end of the winding frame away from the winding disk, and the guide wheel is installed with a rotating shaft, which can guide and retract the measuring rope.

3. The portable well water level depth measuring device according to claim 2, characterized in that: The retracting unit further comprises a hand-held handle, which is fixedly arranged on the reel and is used for holding the hand-held handle during measurement or for carrying the hand-held handle during non-measurement.

4. The portable well water level depth measuring device according to claim 2, characterized in that: The retracting unit also includes magnet 1 and magnet 2, wherein magnet 1 is fixedly arranged on the outer side of the reel, and magnet 2 is fixedly arranged on the inner side of the reel. When the reel is retracted, the positions of magnet 1 and magnet 2 correspond to each other, and the reel is fixed by adsorption.

5. The portable well water level depth measuring device according to claim 2, characterized in that: The winding frame includes support rod 1 and support rod 2, one end of the support rod 1 and support rod 2 are respectively rotatably connected to the two side surfaces of the winding disk, the wire wheel is installed at the other end of the support rod 1 and support rod 2, and the rotating shaft of the wire wheel is rotatably connected to the support rod 1 and support rod 2.

6. The portable well water level depth measuring device according to claim 1, characterized in that: The elastic limiting piece is L-shaped and its bending angle is greater than 90 degrees.

7. The portable well water level depth measuring device according to claim 6, characterized in that: One end of the L-shaped elastic limiting piece that abuts against the measuring rope is in the form of an inwardly concave arc surface, and the inwardly concave arc surface is integrally matched with the surface of the measuring rope.

8. The portable well water level depth measuring device according to claim 1, characterized in that: The at least one elastic limiting piece includes 3 to 4 groups of elastic limiting pieces, which are evenly distributed around the through holes of the floating plate.

9. The portable well water level depth measuring device according to claim 1, characterized in that: The floating board is a circular plastic board or a foam board with a diameter of 15 cm and a thickness of 4 cm.

10. The portable well water level depth measuring device according to claim 1, characterized in that: A threaded column is arranged at one end of the measuring rope used for connecting to a counterweight, a threaded hole is arranged at the center of the counterweight, and the measuring rope is threadedly connected to the threaded hole of the counterweight through the threaded column.

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