A groundwater level measuring device

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By employing a fixed frame, reel, graduated rope, and float in the design of the groundwater level measuring device, the problems of easy probe collision and false triggering by water film on the borehole wall were solved, achieving higher accuracy in water level measurement.

CN224382575UActive Publication Date: 2026-06-19CHONGQING JIQIAN GEOTECHNICAL ENGINEERING CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CHONGQING JIQIAN GEOTECHNICAL ENGINEERING CO LTD
Filing Date: 2025-07-28
Publication Date: 2026-06-19

AI Technical Summary

Technical Problem

Existing groundwater level measuring devices are prone to collision or friction with the borehole wall during the lowering process, which can cause damage to the probe structure, sensor displacement, and the residual water film on the borehole wall can falsely trigger the water level signal, affecting the measurement accuracy, especially in highly permeable strata where the error is significant.

Method used

A device was designed that includes a fixing frame, a reel, a graduated rope, a float, and a detection probe. The graduated rope and float protect the probe from collision with the borehole wall, and the float prevents water film from entering the detection chamber, ensuring that the probe accurately triggers the water level signal.

Benefits of technology

This improved measurement accuracy, avoided damage to the probe structure and false triggering by the water film on the orifice wall, and ensured the accuracy and stability of water level measurement.

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Figure CN224382575U_ABST

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Abstract

This utility model relates to the technical field of water level measurement devices, specifically a groundwater level measurement device, including a fixed frame, a rotatable reel on the fixed frame, a graduated rope connected to the reel, a fixed rod connected to the other end of the graduated rope, an installation cylinder fixedly mounted at the bottom of the fixed rod, a detection chamber inside the installation cylinder, a detection probe fixedly mounted inside the detection chamber, a float mounted on the fixed rod, a sleeve fixedly mounted at the bottom of the float, the sleeve being fitted onto the installation cylinder with a height equal to the height of the installation cylinder, a locking block fixedly mounted above the float on the fixed rod, and the installation cylinder being lowered along the detection hole. The sleeve and installation cylinder protect the detection probe, preventing collision between the hole wall and the detection probe, and also preventing residual water from the hole wall from seeping into the detection chamber and contacting the detection probe, thus improving measurement accuracy.

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Description

Technical Field

[0001] This application relates to the technical field of water level measuring devices, specifically a groundwater level measuring device. Background Technology

[0002] In the current field of groundwater level monitoring, mechanical contact measuring devices are widely used. These devices typically employ a probe equipped with a water level sensor, which is manually lowered into an underground detection borehole (well) via a cable or ruler. The operator lowers the probe into the borehole step by step according to the physical scale lines attached to the cable. When the probe contacts the water surface, the water level depth is determined by methods such as circuit continuity, audible and visual cues, or changes in resistance. Finally, the measurement result is obtained by reading the scale value corresponding to the probe's hovering position.

[0003] However, during the aforementioned testing process, the probe is prone to rigid collisions or friction with the borehole wall during lowering. This can not only cause structural damage to the probe, sensor misalignment, or calibration errors, but also result in residual water films adhering to some borehole walls due to permeation, or the formation of localized water accumulation areas. When the probe touches such areas, it is easy to falsely trigger water level signals (e.g., conductive probes become conductive due to the water film on the borehole wall), causing the water level readings to systematically deviate from the true value. This error is particularly significant in areas with high formation permeability, affecting measurement accuracy. Utility Model Content

[0004] In view of the problem that the probe is easily affected by residual water on the borehole wall during measurement in the prior art, this utility model provides a groundwater level measuring device.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] This utility model provides a groundwater level measuring device, characterized in that it includes:

[0007] The base has a fixed frame, a rotatable reel on the fixed frame, a graduated rope connected to the reel, a fixed rod connected to the other end of the graduated rope, and an installation cylinder fixed to the bottom of the fixed rod.

[0008] The mounting cylinder has a detection chamber inside, and a detection probe is fixedly installed inside the detection chamber. A float is sleeved on the fixing rod, and a sleeve is fixedly installed at the bottom of the float. The sleeve is sleeved on the mounting cylinder and the height of the sleeve is equal to the height of the mounting cylinder. A locking block is fixedly installed on the fixing rod above the float. The bottom of the mounting cylinder has a filter hole that communicates with the detection chamber.

[0009] Preferably, a limiting ring is fixedly provided on the base, and the limiting ring is provided with a limiting hole. The float and the sleeve pass through the limiting hole. After the mounting cylinder and the float are removed, the limiting hole on the limiting ring can limit the sleeve and the mounting cylinder, preventing the moving mounting cylinder and the sleeve from swinging and ensuring the safety of the equipment.

[0010] Preferably, a guide rod is fixedly provided at the bottom of the fixing frame. The guide rod has a guide hole aligned with the limiting hole. The scale rope is passed through the guide hole. The scale rope is passed through the guide hole when lowering and retracting to guide and limit the scale rope, so as to prevent the scale rope in the detection hole from swinging during the rotation of the thread wheel and to prevent the sleeve and mounting cylinder from colliding with the hole wall.

[0011] Preferably, a motor is fixedly installed on one side of the fixing frame, and the output shaft of the motor is connected to one end of the reel. When the reel is rotated, the operator starts the motor, and the output shaft of the motor drives the reel to rotate, thereby retracting and lowering the graduated rope on the reel, which is convenient to operate.

[0012] Preferably, a level is provided on the base, and fixed plates are vertically slidably installed on both sides of the fixing frame. An electric push rod is installed at the top height of the fixing frame, and the output shaft of the electric push rod is fixedly connected to the top of the fixed plate. Two sets of adjusting rods are spaced apart on the fixed plate. The bottom of the adjusting rod passes through the base and is fixedly installed with an abutment seat. When the base is moved to the location to be measured, the operator activates the electric push rod on the fixing frame. The output shaft of the electric push rod drives the fixed plate to descend, and the fixed plate drives the adjusting rod to descend synchronously. Finally, the abutment seat at the bottom of the adjusting rod abuts the ground, improving the stability of the base and preventing the base from moving during measurement. Furthermore, the horizontal state of the base can be judged by reading the level on the base, and then the horizontal state of the base can be adjusted by the electric push rod to ensure that the installation cylinder can be lowered vertically along the detection hole.

[0013] Preferably, the upper end of the adjusting rod is provided with a threaded section. The adjusting rod is inserted into the fixed plate. When the operator rotates the adjusting rod, the bottom abutment seat will rise and fall. By adjusting the position of the abutment seat at the bottom of each set of adjusting rods individually, the base can be kept level on sloping or uneven ground.

[0014] Preferably, the fixing frame is provided with a sliding groove in the vertical direction, and a slider that matches the sliding groove is fixedly installed on the fixing plate. When the fixing plate slides in the vertical direction, the slider and the sliding groove limit the fixing plate and ensure the stability of the sliding of the fixing plate.

[0015] The advantages of adopting the above technical solution are:

[0016] This utility model includes a fixed frame with a rotating reel connected to it. A graduated rope is connected to the reel, and a fixed rod is connected to the other end of the rope. A mounting cylinder is fixedly mounted at the bottom of the fixed rod, and a detection chamber is provided inside the mounting cylinder. A detection probe is fixedly mounted inside the detection chamber. A float is sleeved on the fixed rod, and a sleeve is fixedly mounted at the bottom of the float. The sleeve is fitted onto the mounting cylinder, and the height of the sleeve is equal to the height of the mounting cylinder. A locking block is fixedly mounted above the float on the fixed rod. The mounting cylinder is lowered along the detection hole. The sleeve and mounting cylinder protect the detection probe, preventing the hole wall from colliding with the detection probe. At the same time, it prevents residual water from the hole wall from seeping into the detection chamber and contacting the detection probe, thus improving measurement accuracy. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of this utility model is shown;

[0019] Figure 2 A partial sectional view of the mounting cylinder of this utility model is shown;

[0020] Figure 3 A partial cross-sectional view of the float of this invention in a floating state is shown;

[0021] Figure 4 A partial cross-sectional view of the base of this utility model is shown;

[0022] Figure 5 A partially enlarged view of part A of this utility model is shown.

[0023] The components include: 1. Base; 101. Limiting ring; 102. Slide groove; 2. Fixing frame; 201. Guide rod; 202. Guide hole; 3. Thread wheel; 301. Scale rope; 302. Motor; 4. Fixing rod; 401. Locking block; 5. Detection probe; 6. Mounting cylinder; 601. Detection chamber; 602. Filter hole; 7. Float; 701. Sleeve; 8. Fixing plate; 801. Electric push rod; 9. Adjusting rod; 901. Abutment seat. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] like Figure 1-5 As shown, this utility model embodiment discloses a groundwater level measuring device, including a base 1, a fixed frame 2 fixedly mounted on the base 1, a rotatable reel 3 mounted on the fixed frame 2, a scale rope 301 connected to the reel 3, a fixed rod 4 connected to the other end of the scale rope 301, and an installation cylinder 6 fixedly mounted at the bottom of the fixed rod 4.

[0026] The mounting cylinder 6 is provided with a detection chamber 601, and a detection probe 5 is fixedly installed in the detection chamber 601. A float 7 is sleeved on the fixing rod 4, and a sleeve 701 is fixedly installed at the bottom of the float 7. The sleeve 701 is sleeved on the mounting cylinder 6 and the height of the sleeve 701 is equal to the height of the mounting cylinder 6. A locking block 401 is fixedly installed on the fixing rod 4 above the float 7. The bottom of the mounting cylinder 6 is provided with a filter hole 602 that communicates with the detection chamber 601.

[0027] In at least one embodiment, a limiting ring 101 is fixedly provided on the base 1. The limiting ring 101 is provided with a limiting hole. The float 7 and the sleeve 701 pass through the limiting hole. After the mounting cylinder 6 and the float 7 are removed, the limiting hole on the limiting ring 101 can limit the sleeve 701 and the mounting cylinder 6, so as to prevent the movable mounting cylinder 6 and the sleeve 701 of the base 1 from swinging and ensure the safety of the equipment.

[0028] In at least one embodiment, a guide rod 201 is fixedly provided at the bottom of the fixing frame 2. The guide rod 201 is provided with a guide hole 202 aligned with the limiting hole. The scale rope 301 is passed through the guide hole 202. The scale rope 301 is passed through the guide hole 202 during lowering and retraction to guide and limit the scale rope 301, so as to prevent the scale rope 301 in the detection hole from swinging during the rotation of the thread wheel 3, and to prevent the sleeve 701 and the mounting cylinder 6 from colliding with the hole wall.

[0029] In at least one embodiment, a motor 302 is fixedly installed on one side of the fixing frame 2. The output shaft of the motor 302 is connected to one end of the reel 3 for transmission. When the reel 3 is rotated, the operator starts the motor 302. The output shaft of the motor 302 drives the reel 3 to rotate, thereby retracting and lowering the graduated rope 301 on the reel 3. The operation is convenient.

[0030] In at least one embodiment, a level is provided on the base 1, and fixed plates 8 are vertically slidably provided on both sides of the fixed frame 2. An electric push rod 801 is provided at the top height of the fixed frame 2. The output shaft of the electric push rod 801 is fixedly connected to the top of the fixed plate 8. Two sets of adjusting rods 9 are provided at intervals on the fixed plate 8. The bottom of the adjusting rod 9 passes through the base 1 and is fixedly provided with an abutment seat 901. When the base 1 is moved to the location to be measured, the operator starts the electric push rod 801 on the fixed frame 2. The output shaft of the electric push rod 801 drives the fixed plate 8 to descend, and the fixed plate 8 drives the adjusting rod 9 to descend synchronously. Finally, the abutment seat 901 at the bottom of the adjusting rod 9 abuts against the ground, improving the stability of the base 1 and preventing the base 1 from moving during measurement. Furthermore, the horizontal state of the base 1 can be judged by reading the level on the base 1, and then the horizontal state of the base 1 can be adjusted by the electric push rod 801 to ensure that the mounting cylinder 6 can be lowered vertically along the detection hole.

[0031] In at least one embodiment, the upper end of the adjusting rod 9 is provided with a threaded section. The adjusting rod 9 is inserted into the fixed plate 8. When the operator rotates the adjusting rod 9, the bottom abutment seat 901 will rise and fall. By adjusting the position of the abutment seat 901 at the bottom of each set of adjusting rods 9 individually, the base 1 can be kept level on sloping or uneven ground.

[0032] In at least one embodiment, the fixing frame 2 is provided with a sliding groove 102 in the vertical direction, and a slider that matches the sliding groove 102 is fixedly provided on the fixing plate 8. When the fixing plate 8 slides in the vertical direction, the slider and the sliding groove 102 limit the fixing plate 8 to ensure the stability of the sliding of the fixing plate 8.

[0033] In at least one embodiment, a battery and a switch module are provided on the base 1. The electric push rod 801 and the motor 302 are electrically connected to the battery and the switch module through wires. The operator can adjust the working status of the motor 302 and the electric push rod 801 through the switch module.

[0034] When measuring the groundwater level, the operator moves the base 1 to the detection hole to be measured, then aligns the mounting cylinder 6 on the fixing rod 4 with the detection hole. The mounting cylinder 6 is then lowered by rotating the reel 3. As the mounting cylinder 6 descends along the detection hole, the sleeve 701 at the bottom of the float 7 covers it, preventing direct collision between the mounting cylinder 6 and the hole wall during descent. Furthermore, the detection probe 5 is located within the detection cavity 601 inside the mounting cylinder 6, further preventing collision between the probe 5 and the hole wall. Moreover, thanks to the protection of the sleeve 701 and the mounting cylinder 6, residual water on the hole wall will not seep into the detection cavity 601 and contact the probe 5, preventing the probe 5 from erroneously triggering the water level signal. When the mounting cylinder 6 descends to the water surface, the float 7 causes the sleeve 701 to float on the water surface. The fixed rod 4 and the mounting cylinder 6 continue to descend. When the locking block 401 at the top of the fixed rod 4 comes into contact with the float 7, the mounting cylinder 6 stops descending. As the mounting cylinder 6 descends to the water surface, water flows into the detection chamber 601 along the filter hole 602 at the bottom of the mounting cylinder 6, thus contacting the detection probe 5 inside the detection chamber 601. The detection probe 5 then sends out a water level signal, and the operator can read and record the water level by reading the scale on the scale rope 301. The operation is convenient. Furthermore, the support of the mounting cylinder 6 and the fixed rod 4 after the float 7 contacts the water surface can be combined with the detection of the probe to improve the measurement accuracy.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A groundwater level measuring device, characterized in that: include The base has a fixed frame, a rotatable reel on the fixed frame, a graduated rope connected to the reel, a fixed rod connected to the other end of the graduated rope, and an installation cylinder fixed to the bottom of the fixed rod. The mounting cylinder has a detection chamber inside, and a detection probe is fixedly installed inside the detection chamber. A float is sleeved on the fixing rod, and a sleeve is fixedly installed at the bottom of the float. The sleeve is sleeved on the mounting cylinder and the height of the sleeve is equal to the height of the mounting cylinder. A locking block is fixedly installed on the fixing rod above the float. The bottom of the mounting cylinder has a filter hole that communicates with the detection chamber.

2. The groundwater level measuring device according to claim 1, characterized in that: A limiting ring is fixedly installed on the base, and a limiting hole is provided on the limiting ring. The float and the sleeve pass through the limiting hole.

3. The groundwater level measuring device according to claim 2, characterized in that: A guide rod is fixedly installed at the bottom of the fixed frame. The guide rod has a guide hole aligned with the limiting hole, and the scale rope passes through the guide hole.

4. The groundwater level measuring device according to claim 1, characterized in that: A motor is fixedly installed on one side of the fixing frame, and the output shaft of the motor is connected to one end of the reel for transmission.

5. The groundwater level measuring device according to claim 1, characterized in that: A level is installed on the base, and fixed plates are vertically slidably installed on both sides of the fixed frame. An electric push rod is installed at the top of the fixed frame. The output shaft of the electric push rod is fixedly connected to the top of the fixed plate. Two sets of adjusting rods are spaced apart on the fixed plate. The bottom of the adjusting rod passes through the base and is fixedly installed with an abutment seat.

6. The groundwater level measuring device according to claim 5, characterized in that: The upper end of the adjusting rod is provided with a threaded section, and the adjusting rod is inserted into the fixed plate.

7. A groundwater level measuring device according to claim 6, characterized in that: The fixing frame is provided with a sliding groove in the vertical direction, and a slider that matches the sliding groove is fixedly installed on the fixing plate.