Foundation pit dewatering well water level measuring device

Abstract

The invention relates to the technical field of water level measurement, and discloses a foundation pit dewatering well water level measuring device which comprises a supporting table, a gradienter and a supporting frame are arranged on the upper surface of the supporting table, a supporting mechanism is arranged on the outer wall of the supporting table, a U-shaped frame is fixedly connected to the outer wall of the supporting frame, and a motor is fixedly connected to the interior of the U-shaped frame in a penetrating mode. A first connecting shaft is arranged at the output end of the motor, a first bevel gear is fixedly connected to the outer wall of the first connecting shaft, a second bevel gear is connected to the tooth end of the first bevel gear in a meshed mode, and a measuring cable is arranged on the outer wall of the take-up rod. When the measuring cable is taken back, stains on the surface of the measuring cable can be cleaned through the cleaning mechanism, the neatness of the measuring cable is ensured, and the measuring cable can be neatly wound on the take-up rod through the reciprocating mechanism; and the cleaning mechanism and the reciprocating mechanism can rotate no matter when the measuring cables are taken up or paid off, so that the tidy arrangement of the measuring cables and the tidiness of the outer walls are ensured.

Description

Technical Field

[0001] This invention relates to the field of water level measurement technology, specifically to a water level measuring device for a foundation pit dewatering well. Background Technology

[0002] In deep foundation pit construction, groundwater level control is a crucial aspect. Inaccurate or delayed water level monitoring can lead to insufficient dewatering causing well flooding accidents, or excessive pumping causing ground subsidence. Foundation pit dewatering well water level measuring devices are specialized equipment used in construction projects to monitor the groundwater level inside the foundation pit. Their main function is to measure the water level depth in the dewatering well in real time and accurately, providing key data support for foundation pit dewatering projects. By dynamically monitoring changes in groundwater level, the construction team can adjust the dewatering plan in a timely manner, effectively preventing risks such as foundation pit water inrush, piping, or slope instability, and ensuring construction safety and the stability of surrounding buildings.

[0003] Traditional manual measurement methods require operators to frequently descend into the well or use simple tools such as rulers and floats. Manual visual readings are easily affected by light and angle, and it is difficult to capture accurate scales when the water level fluctuates. Each well needs to be measured individually, which is time-consuming and labor-intensive. There is a risk of falling or inhaling harmful gases when operating close to the wellhead. Furthermore, the cables become contaminated with dirt after prolonged contact with mud and water, obscuring the scale markings. Frequent shutdowns and manual wiping are required, affecting the continuity of monitoring. Uneven accumulation of cables on the reel during winding not only reduces cable life but also increases release resistance due to disordered cable routing, affecting the free fall of the counterweight and causing measurement errors. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a water level measuring device for foundation pit dewatering wells, which solves the problems of poor accuracy of manual readings, blurred scale due to cable contamination, easy tangling and knotting during the deployment and retraction process, cumbersome installation height adjustment, and lack of self-maintenance functions in traditional measurement methods.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A water level measuring device for a foundation pit dewatering well includes a support platform. A level and a support frame are mounted on the upper surface of the support platform. A support mechanism is mounted on the outer wall of the support platform. A U-shaped frame is fixedly connected to the outer wall of the support frame. A motor is fixedly connected through the interior of the U-shaped frame. A first connecting shaft is mounted on the output end of the motor. A first bevel gear is fixedly connected to the outer wall of the first connecting shaft. A second bevel gear is meshed with the tooth end of the first bevel gear. A second connecting shaft is fixedly connected to the bottom end of the second bevel gear. A cleaning mechanism is mounted on the outer wall of the second connecting shaft. A take-up rod is fixedly connected to the outer wall of the first connecting shaft. A measuring cable is mounted on the outer wall of the take-up rod. A water level detection probe and a counterweight are fixedly connected to the outer wall of the measuring cable. The counterweight is located below the water level detection probe. A reciprocating mechanism is mounted on the outer wall of the measuring cable.

[0006] By adopting the above technical solution: The motor drives the first connecting shaft to rotate, which in turn drives the take-up rod to rotate, thus enabling the release and retraction of the measuring cable. Under the gravity of the counterweight, the measuring cable remains taut. When the water level probe touches the water surface, the probe floats up and emits an audible and visual alert, indicating to the operator that the cable has touched water, facilitating the reading of the scale on the measuring cable and completing the water level measurement. When the measuring cable is retracted, a cleaning mechanism cleans the surface of the cable, ensuring its cleanliness. This avoids the hassle of manual cleaning, improves the service life and measurement accuracy of the measuring cable, and the reciprocating mechanism neatly winds the cable onto the take-up rod. Both the cleaning and reciprocating mechanisms rotate during cable release and retraction, ensuring the cable is neatly arranged and its outer surface is clean. This improves the management efficiency of the measuring cable, avoids the problem of tangled cables, and extends the service life of the measuring cable.

[0007] Preferably, the cleaning mechanism includes a first gear, the interior of which is fixedly connected to the outer wall of the second connecting shaft, the tooth ends of the first gear meshing with the second gear, and a brush cylinder being fixedly connected through the interior of the second gear.

[0008] Preferably, the outer wall of the brush cylinder is rotatably connected to the inside of the support frame, and the inner wall of the brush cylinder is rotatably connected to the outer wall of the measuring cable.

[0009] Preferably, the outer wall of the first connecting shaft is rotatably connected to the inside of the support frame, the outer wall of the second connecting shaft is rotatably connected to the inside of the support frame, the outer wall of the take-up rod is rotatably connected to the inside of the support frame, and the measuring cable is slidably connected through the inside of the cleaning mechanism.

[0010] Preferably, the reciprocating mechanism includes a reciprocating lead screw, the outer wall of which is fixedly connected to the outer wall of the support frame, and a pulley is rotatably connected to the outer wall of the reciprocating lead screw, the outer wall of which is rotatably connected to the outer wall of the measuring cable.

[0011] Preferably, a limiting block is fixedly connected to the inner wall of the pulley, and the outer wall of the limiting block is slidably connected to the inside of the reciprocating lead screw.

[0012] Preferably, the support mechanism includes a bracket base, the outer wall of which is disposed on the outer wall of the support platform, and a plurality of support rods are movably connected to the lower surface of the bracket base via connecting seats.

[0013] Preferably, the outer wall of the support rod is slidably connected to a support leg, the support leg has a groove inside, and the support rod is fixedly connected to a limit cylinder inside.

[0014] Preferably, the inner wall of the limiting cylinder is slidably connected to a locking block, and the outer wall of the locking block is slidably connected to the inner wall of the support leg and the locking groove.

[0015] Preferably, a spring is provided inside the limiting cylinder, one end of which is fixed to the locking block, and the other end abuts against the inner wall of the limiting cylinder.

[0016] Working principle: Place the device at the pit opening, and adjust its height by pulling the support legs so they slide on the support rods; during movement, the support legs compress the locking blocks and springs, and when released, the springs rebound and lock the locking blocks into the slots of the support legs, thus fixing the position of the support legs. Subsequently, adjust and tighten the screws to fix the support platform using a level as a reference, ensuring the device is level; Start the motor to drive the first connecting shaft to rotate the take-up rod and release the measuring cable; under the action of the counterweight, the cable remains vertical; when the water level detection probe touches the water surface and floats up, it emits an audible and visual alert; at this time, the water level depth can be measured by reading the cable scale. The measuring cable can be retracted by reversing the motor. The motor drives the first connecting shaft to rotate, which in turn drives the first bevel gear to rotate. The first bevel gear drives the second connecting shaft to rotate, which in turn drives the first gear to rotate. The first gear drives the brush cylinder to rotate in the take-up rod through the second gear. The rotation of the brush cylinder can clean the dirt on the surface of the measuring cable. Simultaneously, as the measuring cable is retracted, the pulley rotates, causing the limit block to slide on the reciprocating screw. The limit block, in turn, causes the pulley to slide on the reciprocating screw. Driven by the pulley, the measuring cable is neatly wound onto the take-up bar. Whether retrieving or releasing the measuring cable, the brush and pulley rotate, ensuring the cleanliness of the outer wall of the measuring cable and the neatness of the cable arrangement.

[0017] This invention provides a device for measuring the water level in a foundation pit dewatering well. It has the following beneficial effects: 1. In this invention, when the measuring cable is retracted, the motor drives the brush cylinder to rotate via a first bevel gear, a second bevel gear, a second connecting shaft, a first gear, and a second gear. The rotation of the brush cylinder cleans the dirt on the surface of the measuring cable, ensuring its cleanliness. This avoids the inconvenience of manual cleaning, improves the service life and measurement accuracy of the measuring cable, and simultaneously drives the pulley to rotate. The pulley slides on the reciprocating screw via a limit block, thus neatly winding the measuring cable onto the take-up rod. Whether retracting or releasing the measuring cable, the pulley and brush cylinder rotate, ensuring the measuring cable is neatly arranged and its outer surface is clean. This improves the management efficiency of the measuring cable, avoids the problem of messy tangling, and extends the service life of the measuring cable.

[0018] 2. In this invention, by starting the motor, the motor drives the first connecting shaft to rotate, which in turn drives the take-up rod to rotate, thereby realizing the release and retraction of the measuring cable; under the gravity of the counterweight, the measuring cable remains taut; when the water level detection probe touches the water surface, the probe floats up and emits an audible and visual prompt, indicating to the operator that it has touched the water, thus facilitating the reading of the scale on the measuring cable and completing the water level measurement.

[0019] 3. In this invention, the horizontal position of the support platform is adjusted using a level as a reference to ensure that the entire device is level. After adjustment, the position of the support platform can be fixed by tightening the screws between the support platform and the bracket. This design ensures the accuracy of the measurement, avoids measurement errors caused by device tilting, and provides a reliable basis for subsequent water level measurement.

[0020] 4. In this invention, by pulling the support leg, it slides on the support rod, and then the support leg squeezes the locking block, causing the locking block to slide in the limiting cylinder and compress the spring; when the support leg is released, the spring rebounds, locking the locking block into the slot in the support leg, thereby fixing the position of the support leg on the support rod; this design allows the device to quickly and conveniently adjust the height according to actual needs, and ensures that the adjusted height is stable and reliable, making it suitable for foundation pit measurement environments of different depths. Attached Figure Description

[0021] Figure 1 This is a perspective view of a water level measuring device for a foundation pit dewatering well according to the present invention; Figure 2 This is a schematic diagram of the counterweight block of a foundation pit dewatering well water level measuring device according to the present invention; Figure 3 This is a schematic diagram of the take-up rod of a foundation pit dewatering well water level measuring device according to the present invention; Figure 4This is a schematic diagram of the reciprocating lead screw of a foundation pit dewatering well water level measuring device according to the present invention; Figure 5 This is a schematic diagram of the brush cylinder of a foundation pit dewatering well water level measuring device according to the present invention; Figure 6 This is a schematic diagram of the measuring cable for a foundation pit dewatering well water level measuring device according to the present invention; Figure 7 This is a schematic diagram of a limiting block for a foundation pit dewatering well water level measuring device according to the present invention; Figure 8 This is a schematic diagram of the card block of a foundation pit dewatering well water level measuring device according to the present invention; Figure 9 This is a schematic diagram of a spring in a foundation pit dewatering well water level measuring device according to the present invention.

[0022] The components are as follows: 1. Support platform; 2. Level; 3. Support frame; 4. U-shaped frame; 5. Motor; 6. First connecting shaft; 7. First bevel gear; 8. Second bevel gear; 9. Second connecting shaft; 10. First gear; 11. Second gear; 12. Brush tube; 13. Take-up rod; 14. Measuring cable; 15. Water level detection probe; 16. Counterweight; 17. Reciprocating screw; 18. Pulley; 19. Limiting block; 20. Bracket base; 21. Support rod; 22. Support leg; 23. Slot; 24. Limiting cylinder; 25. Locking block; 26. Spring. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see the appendix Figure 1 -Appendix Figure 6This invention provides a water level measuring device for a foundation pit dewatering well, including a support platform 1. A level 2 and a support frame 3 are provided on the upper surface of the support platform 1. A support mechanism is provided on the outer wall of the support platform 1. A U-shaped frame 4 is fixedly connected to the outer wall of the support frame 3. A motor 5 is fixedly connected through the interior of the U-shaped frame 4. A first connecting shaft 6 is provided at the output end of the motor 5. A first bevel gear 7 is fixedly connected to the outer wall of the first connecting shaft 6. A second bevel gear 8 is meshed with the tooth end of the first bevel gear 7. A second connecting shaft 9 is fixedly connected to the bottom end of the second bevel gear 8. A cleaning mechanism is provided on the outer wall of the second connecting shaft 9. A take-up rod 13 is fixedly connected to the outer wall of the first connecting shaft 6. A measuring cable 14 is provided on the outer wall of the take-up rod 13. A water level detection probe 15 and a counterweight 16 are fixedly connected to the outer wall of the measuring cable 14. The counterweight 16 is located below the water level detection probe 15. A reciprocating mechanism is provided on the outer wall of the measuring cable 14.

[0025] Specifically, the support platform 1 is leveled using the level 2 as a reference to ensure the overall level of the device, thereby improving measurement accuracy. After the support platform 1 is leveled, the screws between the support platform 1 and the bracket 20 are tightened to fix the position of the support platform 1, thus maintaining the stability of the device during measurement. The motor 5 is started, which drives the first connecting shaft 6 to rotate in the support frame 3. The first connecting shaft 6 drives the take-up rod 13 to rotate, thus releasing the measuring cable 14. Under the gravity of the counterweight 16, the measuring cable 14 is straightened, thereby reducing measurement errors and improving measurement accuracy. When the water level detection probe 15 touches the water, it floats up and emits a buzzer and flashes a light to indicate that it has touched the water, thus facilitating the operator to identify the measurement point. At this time, the motor 5 stops rotating and automatically locks to prevent accidental movement and ensure measurement accuracy. Then, the scale on the measuring cable 14 is read to measure the water level, thus achieving accurate acquisition of water level data.

[0026] Please see the appendix Figure 3 -Appendix Figure 6 The cleaning mechanism includes a first gear 10, the inside of which is fixedly connected to the outer wall of the second connecting shaft 9. The teeth of the first gear 10 are meshed with a second gear 11, and a brush cylinder 12 is fixedly connected through the inside of the second gear 11. The outer wall of the brush cylinder 12 is rotatably connected to the inside of the support frame 3, and the inner wall of the brush cylinder 12 is rotatably connected to the outer wall of the measuring cable 14.

[0027] Specifically, reversing the motor 5 retracts the measuring cable 14, achieving automated cable retraction. The motor 5 drives the first connecting shaft 6 to rotate, transmitting power to the motor 5 and controlling the rotation of subsequent gear sets. This, in turn, drives the first bevel gear 7, which in turn drives the second connecting shaft 9 via the second bevel gear 8. The second connecting shaft 9 then drives the first gear 10, which in turn drives the brush cylinder 12 via the second gear 11, causing it to rotate on the take-up rod 13. The support frame 3 serves to support and limit the brush cylinder 12, thereby ensuring the stability of the brush cylinder 12 during rotation and preventing it from shifting. The inner wall of the brush cylinder 12 is equipped with brushes, which effectively remove dirt from the surface of the measuring cable 14 when the brush cylinder 12 rotates, thus optimizing the cleaning effect and enriching the cleaning function. The brushes not only improve cleaning efficiency but also reduce wear on the cable surface and extend the cable's service life. The rotation of the brush cylinder 12 cleans the dirt on the surface of the measuring cable 14, thereby keeping the measuring cable 14 clean and extending its service life.

[0028] Please see the appendix Figure 1 -Appendix Figure 6 The outer wall of the first connecting shaft 6 is rotatably connected to the inside of the support frame 3, the outer wall of the second connecting shaft 9 is rotatably connected to the inside of the support frame 3, the outer wall of the take-up rod 13 is rotatably connected to the inside of the support frame 3, and the measuring cable 14 is slidably connected through the inside of the cleaning mechanism.

[0029] Specifically, the support frame 3 serves to support and limit the first connecting shaft 6, the second connecting shaft 9, and the take-up rod 13, thereby ensuring the stability of the first connecting shaft 6, the second connecting shaft 9, and the take-up rod 13 during rotation. The rotation of the first connecting shaft 6, the second connecting shaft 9, and the take-up rod 13 is all carried out synchronously, thereby ensuring the stability of the overall device measurement. When the second connecting shaft 9 rotates, it will drive the cleaning mechanism to rotate, which can clean the measuring cable 14, thereby ensuring the clarity of the scale on the measuring cable 14 and making it easy to read.

[0030] Please see the appendix Figure 3 Appendix Figure 4 and attached Figure 7 The reciprocating mechanism includes a reciprocating lead screw 17, the outer wall of which is fixedly connected to the outer wall of the support frame 3, and a pulley 18 is rotatably connected to the outer wall of the reciprocating lead screw 17. The outer wall of the pulley 18 is rotatably connected to the outer wall of the measuring cable 14. A limit block 19 is fixedly connected to the inner wall of the pulley 18, and the outer wall of the limit block 19 is slidably connected to the inside of the reciprocating lead screw 17.

[0031] Specifically, when the measuring cable 14 is retracted, the pulley 18 rotates, causing the limiting block 19 to slide on the reciprocating screw 17. The support frame 3 supports and fixes the reciprocating screw 17, ensuring its stability. The limiting block 19 then drives the pulley 18 to slide on the reciprocating screw 17. This reciprocating movement of the pulley 18 neatly winds the measuring cable 14 onto the take-up rod 13. The reciprocating movement of the pulley 18 makes the winding process smoother, reducing the sluggishness and delays that may occur during manual winding, significantly improving the efficiency of the winding operation. The neat winding method reduces friction and pressure on the cable during winding, thereby reducing cable wear and extending its service life. Furthermore, the sliding control of the pulley 18 reduces the risk of excessive bending or twisting of the measuring cable 14 during winding, minimizing the risk of cable structural damage.

[0032] Please see the appendix Figure 1 Appendix Figure 2 Appendix Figure 8 and attached Figure 9 The support mechanism includes a bracket 20, the outer wall of which is set on the outer wall of the support platform 1. Multiple support rods 21 are movably connected to the lower surface of the bracket 20 through a connecting seat. Support legs 22 are slidably connected to the outer wall of the support rods 21. The support legs 22 have slots 23 inside. A limiting cylinder 24 is fixedly connected inside the support rods 21. A locking block 25 is slidably connected to the inner wall of the limiting cylinder 24. The outer wall of the locking block 25 is slidably connected to the inner wall of the support legs 22 and the slots 23. A spring 26 is provided inside the limiting cylinder 24. One end of the spring 26 is fixed to the locking block 25, and the other end abuts against the inner wall of the limiting cylinder 24.

[0033] Specifically, when the height needs to be adjusted, simply pull the support leg 22. Pulling the support leg 22 allows it to slide on the support rod 21. The support leg 22 also compresses the locking block 25, causing it to slide within the limiting cylinder 24, and compresses the spring 26, causing it to contract. The spring 26 then rebounds, locking the locking block 25 into the slot 23 within the support leg 22. This fixes the position of the support leg 22 on the support rod 21, thus adapting to different pit depths. The bracket base 20 supports the entire device via the support platform 1. The slot 23 limits the locking block 25, fixing its position. The limiting cylinder 24 limits the locking block 25, restricting its direction and range of motion. This ensures the locking block 25 can only slide back and forth along a preset axis within the cavity of the limiting cylinder 24, preventing it from laterally or axially dislodging from the limiting cylinder 24.

[0034] In this embodiment, when in use, the entire device is first placed at the pit opening where the water level needs to be measured. Then, the height of the entire device is adjusted as needed. When adjusting the height, simply pull the support leg 22. By pulling the support leg 22, it slides on the support rod 21. Then, the support leg 22 squeezes the locking block 25, causing it to slide in the limiting cylinder 24 and squeeze the spring 26 to retract. Under the rebound of the spring 26, the locking block 25 can be locked in the slot 23 in the support leg 22, thereby fixing the position of the support leg 22 on the support rod 21. Then, using the level 2 as a reference, adjust the level of the support platform 1 to ensure that the entire device is level, thereby making the measurement accurate. After adjusting the support platform 1 to be level, tighten the screws between the support platform 1 and the bracket 20 to fix the position of the support platform 1. Then start the motor 5, which drives the first connecting shaft 6 to rotate in the support frame 3. The first connecting shaft 6 drives the take-up rod 13 to rotate, which releases the measuring cable 14. Under the gravity of the counterweight 16, the measuring cable 14 can be straightened. When the water level detection probe 15 touches the water, it floats up and emits a beeping sound and flashing light to indicate that it has touched the water. Read the scale on the measuring cable 14 to measure the water level. The measuring cable 14 can be retracted by reversing the motor 5. The motor 5 drives the first connecting shaft 6 to rotate, which in turn drives the first bevel gear 7 to rotate. The first bevel gear 7 drives the second connecting shaft 9 to rotate through the second bevel gear 8. The second connecting shaft 9 drives the first gear 10 to rotate through the second gear 11. The first gear 10 drives the brush cylinder 12 to rotate in the take-up rod 13 through the second gear 11. The rotation of the brush cylinder 12 can clean the dirt on the surface of the measuring cable 14. Simultaneously, as the measuring cable 14 is retracted, the pulley 18 rotates, causing the limiting block 19 to slide on the reciprocating screw 17. The limiting block 19 then drives the pulley 18 to slide on the reciprocating screw 17. Driven by the pulley 18, the measuring cable 14 can be neatly wound onto the take-up rod 13. Whether the measuring cable 14 is being taken in or released, the brush cylinder 12 and the pulley 18 will rotate, thus ensuring the cleanliness of the outer wall of the measuring cable 14 and the neatness of its arrangement.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the water level of a foundation pit dewatering well, comprising a support platform (1), characterized in that, A level (2) and a support frame (3) are provided on the upper surface of the support platform (1). A support mechanism is provided on the outer wall of the support platform (1). A U-shaped frame (4) is fixedly connected to the outer wall of the support frame (3). A motor (5) is fixedly connected through the interior of the U-shaped frame (4). A first connecting shaft (6) is provided at the output end of the motor (5). A first bevel gear (7) is fixedly connected to the outer wall of the first connecting shaft (6). A second bevel gear (8) is meshed with the tooth end of the first bevel gear (7). The bottom end of the bevel gear (8) is fixedly connected to a second connecting shaft (9). A cleaning mechanism is provided on the outer wall of the second connecting shaft (9). A take-up rod (13) is fixedly connected to the outer wall of the first connecting shaft (6). A measuring cable (14) is provided on the outer wall of the take-up rod (13). A water level detection probe (15) and a counterweight (16) are fixedly connected to the outer wall of the measuring cable (14). The counterweight (16) is located below the water level detection probe (15). A reciprocating mechanism is provided on the outer wall of the measuring cable (14).

2. The water level measuring device for foundation pit dewatering wells according to claim 1, characterized in that, The cleaning mechanism includes a first gear (10), the inside of which is fixedly connected to the outer wall of the second connecting shaft (9), the tooth end of the first gear (10) is meshed with a second gear (11), and the inside of the second gear (11) is fixedly connected to a brush cylinder (12).

3. The water level measuring device for foundation pit dewatering wells according to claim 2, characterized in that, The outer wall of the brush tube (12) is rotatably connected to the inside of the support frame (3), and the inner wall of the brush tube (12) is rotatably connected to the outer wall of the measuring cable (14).

4. The water level measuring device for foundation pit dewatering wells according to claim 1, characterized in that, The outer wall of the first connecting shaft (6) is rotatably connected to the inside of the support frame (3), the outer wall of the second connecting shaft (9) is rotatably connected to the inside of the support frame (3), the outer wall of the take-up rod (13) is rotatably connected to the inside of the support frame (3), and the measuring cable (14) is slidably connected through the inside of the cleaning mechanism.

5. The water level measuring device for a foundation pit dewatering well according to claim 1, characterized in that, The reciprocating mechanism includes a reciprocating lead screw (17), the outer wall of which is fixedly connected to the outer wall of the support frame (3), and a pulley (18) is rotatably connected to the outer wall of the reciprocating lead screw (17), the outer wall of which is rotatably connected to the outer wall of the measuring cable (14).

6. The water level measuring device for a foundation pit dewatering well according to claim 5, characterized in that, The inner wall of the pulley (18) is fixedly connected to a limiting block (19), and the outer wall of the limiting block (19) is slidably connected to the inside of the reciprocating screw (17).

7. The water level measuring device for foundation pit dewatering wells according to claim 1, characterized in that, The support mechanism includes a bracket (20), the outer wall of which is disposed on the outer wall of the support platform (1), and a plurality of support rods (21) are movably connected to the lower surface of the bracket (20) through a connecting seat.

8. The water level measuring device for a foundation pit dewatering well according to claim 7, characterized in that, The outer wall of the support rod (21) is slidably connected to a support leg (22), and the inside of the support leg (22) is provided with a slot (23). The inside of the support rod (21) is fixedly connected to a limit cylinder (24).

9. The water level measuring device for a foundation pit dewatering well according to claim 8, characterized in that, The inner wall of the limiting cylinder (24) is slidably connected to a locking block (25), and the outer wall of the locking block (25) is slidably connected to the inner wall of the support leg (22) and the slot (23).

10. The water level measuring device for a foundation pit dewatering well according to claim 9, characterized in that, The limiting cylinder (24) is provided with a spring (26) inside. One end of the spring (26) is fixed to the locking block (25), and the other end abuts against the inner wall of the limiting cylinder (24).

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