Underground water level monitoring device and method

Abstract

The invention discloses an underground water level monitoring device and method, and belongs to the technical field of underground water monitoring. The device comprises a shaft, a supporting frame fixed to an opening in the upper end of the shaft, a middle pipe coaxially installed in the center of the shaft, a liquid level sensor installed on the inner side of the middle pipe, and a filtering assembly in sliding fit with the inner wall of the shaft; the middle pipe is matched with the supporting frame and extends downwards in the axial direction of the shaft, an open groove is formed in the pipe wall of the middle pipe in the axial direction, an inner cavity of the middle pipe can be communicated with the shaft through the open groove, the upper end of the liquid level sensor is connected with the supporting frame, and a through hole allowing the middle pipe to penetrate through is formed in the center of the filtering assembly; the filtering assembly is connected with a lifting device at the same time, the lifting device is installed at the upper end of the supporting frame, and the lifting device can drive the filtering assembly to move in the axial direction of the shaft. According to the device, underwater impurities or garbage can be filtered and cleaned, floating objects are prevented from interfering with monitoring of the liquid level, and the monitoring precision of the device is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of groundwater monitoring, and particularly relates to a groundwater level monitoring device and method. Background Art

[0002] Groundwater level monitoring is an important link in water resource management and environmental protection, and is widely used in fields such as agricultural irrigation, urban water supply, and geological disaster warning. At present, the commonly used groundwater level monitoring methods mainly include the pressure sensor method, the float type water level gauge, the ultrasonic water level gauge, etc. These methods determine the water level height by measuring the water pressure, the position of the float, or the acoustic reflection time, and have high accuracy and reliability. However, the existing monitoring devices still face some challenges in practical applications, especially in complex underground environments. For example, when there are garbage, sundries or other obstacles underwater, it may interfere with the monitoring results. For example, the float type water level gauge is easily stuck by sundries, resulting in measurement errors or equipment damage; the pressure sensor may not be able to accurately sense the change of water pressure due to blockage by sundries; when the ultrasonic water level gauge encounters suspended solids or floating objects on the water surface, the acoustic reflection signal may be interfered, affecting the measurement accuracy. These problems not only reduce the accuracy of the monitoring data, but also may increase the equipment maintenance cost, and even shorten the service life of the equipment. Therefore, there is an urgent need to provide a groundwater level monitoring device and method that can clean the underwater garbage in time and facilitate the monitoring of the groundwater level. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a groundwater level monitoring device and method, which can solve the above technical problems.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A groundwater level monitoring device disclosed by the present invention includes a wellbore, a support frame fixed at the upper opening of the wellbore, an intermediate pipe coaxially installed in the center of the wellbore, a liquid level sensor installed inside the intermediate pipe, and a filtering component slidably matched with the inner wall of the wellbore. The intermediate pipe is matched with the support frame and extends downward along the axial direction of the wellbore. An opening groove is axially formed on the pipe wall of the intermediate pipe, and the opening groove can communicate the inner cavity of the intermediate pipe with the wellbore. The upper end of the liquid level sensor is connected to the support frame, and a through hole for the intermediate pipe to pass through is formed in the center of the filtering component; the filtering component is simultaneously connected with a lifting device, the lifting device is installed at the upper end of the support frame, and the lifting device can drive the filtering component to displace along the axial direction of the wellbore.

[0005] Further, an upper limit member, a middle limit member and a lower limit member are simultaneously arranged on the outer side of the intermediate pipe. The filtering component is installed between the middle limit member and the lower limit member, the support frame is located between the upper limit member and the middle limit member, and the intermediate pipe is slidably matched with the support frame.

[0006] Further, the filtering component includes an outer moving disk and an inner rotating disk. First filtering holes and second filtering holes are respectively formed in the outer moving disk and the inner rotating disk. The first filtering holes and the second filtering holes correspond to each other. The outer moving disk is slidably matched with the inner side of the wellbore. A limiting groove is formed on the lower side of the outer moving disk. The inner rotating disk is rotatably installed in the limiting groove. A through hole is formed in the center of the outer moving disk. External threads are formed on the outer side of the intermediate pipe, and the external threads are arranged between the middle limiting member and the lower limiting member. The inner rotating disk is matched with the external threads, and the output end of the lifting component is connected to the outer moving disk.

[0007] Further, a lower magnetic block is arranged at the center of the lower side of the support frame, and an upper magnetic block corresponding to the lower magnetic block is arranged on the upper side of the middle limiting member.

[0008] Further, the lower limiting member includes a sleeve. The sleeve is sleeved on the lower end of the intermediate pipe and is matched with the external threads. By rotating the sleeve, the length of the external threads covered can be changed.

[0009] Further, a central hole is formed in the center of the support frame, and a rubber ring is fixedly installed on the inner side of the central hole. The intermediate pipe is installed in the rubber ring.

[0010] Further, a guiding block is fixed on the support frame, and the guiding block is slidably matched with one of the opening grooves.

[0011] Further, the lifting device includes a motor and a screw rod. The motor is fixed at the upper end of the wellbore, the output end of the motor is connected to the screw rod, and the screw rod is in threaded connection with the filtering component.

[0012] A groundwater level monitoring method uses the water level monitoring device as described in any one of the above, and includes the following steps: Step 1: In the use state, the central pipe is placed on the upper support frame under the action of gravity. The filtering component is located below the water surface. The filtering component is positioned at the lowermost end of the intermediate pipe through the bottom support ring. At this time, the first filtering holes and the second filtering holes are aligned, forming a through hole with a larger aperture, which can facilitate the bottom garbage to float to the upper side of the filtering component through the aligned holes; Step 2: Start the lifting device. The filtering component moves upward under the action of the lifting device. When the filtering component passes through the threaded section of the intermediate pipe, the inner rotating disk rotates relative to the outer moving disk, and the first filtering holes and the second filtering holes are staggered, forming a filtering hole with a smaller aperture, which can intercept the bottom garbage. Until the filtering component contacts the middle support ring, the filtering component drives the central pipe to move upward together. When the filtering component reaches the position of the support frame, the filter residue on the upper side of the filtering component is manually cleaned; Step 3: After the cleaning is completed, the lifting device drives the filter assembly to move downward. After the filter assembly passes through the threaded section, the holes of the first filter plate and the second filter plate are aligned again, which can prevent the filter assembly from pressing garbage and sundries into the water. When the filter assembly contacts the bottom support ring, it breaks free from the magnetic restraint and drives the middle pipe to move downward together until the middle pipe and the filter assembly return to their initial positions; Step 4: Repeat Steps 1 to 3 to achieve garbage cleaning.

[0013] The beneficial effects of the present invention are as follows: A groundwater level monitoring device disclosed by the present invention, by providing a filter assembly, the filter assembly can move from underwater to the opening of the wellbore, so as to filter and clean impurities or garbage underwater, prevent the interference caused by floating objects to the liquid level monitoring, and effectively improve the monitoring accuracy of the device.

[0014] In the device disclosed by the present invention, the middle pipe can effectively protect the liquid level sensor and can further reduce the influence of floating objects on the middle pipe.

[0015] Other advantages, objectives and features of the present invention will be described in the subsequent specification, and to some extent will be obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved through the following specification. Brief Description of the Drawings

[0016] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for description: Figure 1 It is a schematic structural diagram of the device of the present invention; Figure 2 It is a schematic structural diagram of the middle pipe of the present invention; Figure 3 It is Figure 2 The enlarged view in A; Figure 4 It is a schematic structural diagram of the outer moving disk and the inner rotating disk.

[0017] The reference signs in the drawings are as follows: wellbore 1, support frame 2, middle pipe 3, liquid level sensor 4, filter assembly 5, opening groove 6, through hole 7, lifting device 8, upper limit member 9, middle limit member 10, lower limit member 11, outer moving disk 12, inner rotating disk 13, first filter hole 14, second filter hole 15, limit groove 16, external thread 17, lower magnetic block 18, upper magnetic block 19, sleeve 20, rubber ring 21, guide block 22, motor 23, screw 24. Detailed Description of the Embodiment

[0018] As Figures 1 - 4As shown in the figure, a groundwater level monitoring device disclosed by the present invention includes a wellbore 1, a support frame 2 fixed at the upper opening of the wellbore 1, an intermediate pipe 3 coaxially installed in the center of the wellbore 1, a liquid level sensor 4 installed inside the intermediate pipe 3, and a filtering component 5 slidably engaged with the inner wall of the wellbore 1. The intermediate pipe 3 is engaged with the support frame 2 and extends downward along the axial direction of the wellbore 1. An opening groove 6 is axially formed on the pipe wall of the intermediate pipe 3, and the opening groove 6 can communicate the inner cavity of the intermediate pipe 3 with the wellbore 1. The upper end of the liquid level sensor 4 is connected to the support frame 2, and a through hole 7 for the intermediate pipe 3 to pass through is formed in the center of the filtering component 5; the filtering component 5 is simultaneously connected to a lifting device 8, and the lifting device 8 is installed at the upper end of the support frame 2, and the lifting device 8 can drive the filtering component 5 to displace along the axial direction of the wellbore 1.

[0019] In the present invention, by installing the liquid level sensor 4 in the intermediate pipe 3 and communicating the intermediate pipe 3 with the wellbore 1 through the opening groove 6, accurate monitoring of the groundwater level is achieved. The filtering component 5 is slidably engaged with the inner wall of the wellbore 1 and axially displaced through the lifting device 8, so that the garbage in the wellbore 1 can be discharged in time, thereby effectively preventing impurities in the wellbore 1 from blocking the liquid level sensor 4 and ensuring the accuracy and stability of the monitoring data. In addition, the cooperative design of the intermediate pipe 3 and the support frame 2 simplifies the installation process and improves the reliability and service life of the device.

[0020] In this embodiment, an upper limit member 9, a middle limit member 10 and a lower limit member 11 are simultaneously arranged on the outer side of the intermediate pipe 3. The filtering component 5 is installed between the middle limit member 10 and the lower limit member 11, and the support frame 2 is located between the upper limit member 9 and the middle limit member 10. The intermediate pipe 3 is slidably engaged with the support frame 2. By arranging the upper limit member 9, the middle limit member 10 and the lower limit member 11 on the outer side of the intermediate pipe 3, the moving range of the filtering component 5 is limited, preventing it from moving excessively or deviating from the predetermined position in the wellbore 1. This design not only improves the stability of the filtering component 5, but also ensures that the working environment of the liquid level sensor 4 is always in the best state, reducing the monitoring error caused by the improper position of the filtering component 5 and improving the monitoring accuracy of the device. By arranging the support frame 2 between the upper limit member 9 and the middle limit member 10, the moving range of the intermediate pipe 3 can also be restricted, facilitating the cooperation with the filtering component 5.

[0021] In this embodiment, the filter assembly 5 includes an outer movable disk 12 and an inner rotating disk 13, and the outer movable disk 12 and the inner rotating disk 13 are respectively provided with a first filter hole 14 and a second filter hole 15, and the first filter hole 14 and the second filter hole 15 correspond to each other. The outer movable disk 12 is slidably matched with the inner side of the wellbore 1, and a limiting groove 16 is formed on the lower side of the outer movable disk 12. The inner rotating disk 13 is rotatably installed in the limiting groove 16. The through hole 7 is formed in the center of the outer movable disk 12, and an external thread 17 is provided on the outer side of the intermediate tube 3. The external thread 17 is arranged between the middle limiting member 10 and the lower limiting member 11. The inner rotating disk 13 cooperates with the external thread 17, and the output end of the lifting assembly is connected to the outer movable disk 12.

[0022] The filter assembly 5 of the present invention adopts a double-layer structure of an outer movable disk 12 and an inner rotating disk 13. The outer movable disk 12 is slidably matched with the inner wall of the wellbore 1, and the inner rotating disk 13 is matched with the external thread 17 through the limit groove 16, so that the matching aperture between the first filter hole 14 and the second filter hole 15 can be changed to meet the needs of two filtering conditions. At the same time, the corresponding design of the first filter hole 14 and the second filter hole 15 further improves the filtering efficiency, can effectively intercept impurities in the wellbore 1, and can also avoid the impurities from stirring back and forth, thereby improving the cleaning efficiency. This design extends the service life of the device and reduces the maintenance frequency.

[0023] In this embodiment, a lower magnetic block 18 is arranged at the center of the lower side of the support frame 2, and an upper magnetic block 19 corresponding to the lower magnetic block 18 is arranged on the upper side of the middle limit member 10, so that the intermediate tube 3 can be attracted to the support frame 2 when it rises, so as to facilitate the cooperation between the threaded section and the filter assembly 5 in the descending stage.

[0024] In this embodiment, the lower stopper 11 includes a sleeve 20, which is sleeved on the lower end of the intermediate tube 3 and cooperates with the external thread 17. By rotating the sleeve 20, the length of the external thread 17 covered can be changed. The working length of the external thread 17 can be adjusted as needed, so that the overlap area of ​​the first filter hole 14 and the second filter hole 15 can be adjusted to meet different needs. For example, when the first filter hole 14 and the second filter hole 15 are basically staggered, the filter hole formed by the overlap of the first filter hole 14 and the second filter hole 15 is the smallest, which can achieve a better filtering effect. When the inner rotating disk 13 rotates a thread segment, the first filter hole 14 and the second filter hole 15 can be completely aligned, which can reduce the obstruction of the lower impurities and facilitate the impurities to float to the water surface. When the thread segment is reduced, the first filter hole 14 and the second filter hole 15 cannot be completely aligned, but the aperture can also be changed to prevent most impurities from entering the water surface.

[0025] In this embodiment, a center hole is opened in the center of the support frame 2, a rubber ring 21 is fixedly installed inside the center hole, and the intermediate tube 3 is installed in the rubber ring 21. The rubber ring 21 installed in the center hole of the support frame 2 not only plays a sealing role, but also avoids the wear of the intermediate tube 3 in contact with the support frame 2 during axial movement. This design prolongs the service life of the intermediate tube 3, while improving the sealing performance of the device, preventing external impurities from entering the intermediate tube 3 and affecting the operation of the liquid level sensor 4. By providing the rubber ring 21, a certain friction force is provided through the elastic squeezing effect of the rubber ring 21, which helps the intermediate tube 3 to move stably.

[0026] In this embodiment, a guide block 22 is fixed on the support frame 2, and the guide block 22 slides with one of the opening grooves 6. The guide block 22 fixed on the support frame 2 slides with the opening groove 6 on the intermediate pipe 3, ensuring the stability of the intermediate pipe 3 during axial movement and preventing it from deflecting or rotating. This design improves the operating accuracy of the device, reduces the monitoring error caused by the improper position of the intermediate pipe 3, and ensures the accuracy of groundwater level monitoring.

[0027] In this embodiment, the lifting device 8 includes a motor 23 and a screw 24. The motor 23 is fixed at the upper end of the wellbore 1. The output end of the motor 23 is connected to the screw 24. The screw 24 is threadedly connected to the filter assembly 5. The lifting device 8 adopts a combination of the motor 23 and the screw 24. The motor 23 drives the filter assembly 5 to perform axial displacement through the screw 24, thereby realizing the automatic lifting of the filter assembly 5. This design not only improves the degree of automation of the device, but also reduces the frequency of manual operation and reduces maintenance costs. At the same time, the threaded connection between the screw 24 and the filter assembly 5 ensures the stability of the lifting process and avoids damage to the device due to sudden movement.

[0028] A method for monitoring groundwater level, using any of the above-mentioned water level monitoring devices, comprises the following steps: Step 1: When in use, the central tube is placed on the upper support frame 2 under the action of gravity, and the filter assembly 5 is located below the water surface. The filter assembly 5 is positioned at the lower end of the intermediate tube 3 through the bottom support ring. At this time, the first filter hole 14 and the second filter hole 15 are aligned to form a through hole with a larger aperture, which can facilitate the bottom garbage to float to the upper side of the filter assembly 5 through the aligned holes; Step 2, start the lifting device 8, the filter assembly 5 moves up under the action of the lifting device 8, when the filter assembly 5 passes through the threaded section of the middle tube 3, the inner rotating disk 13 rotates relative to the outer moving disk 12, the first filter hole 14 and the second filter hole 15 are staggered, forming a filter hole with a smaller aperture, which can intercept the garbage at the bottom, until the filter assembly 5 contacts the middle support ring, the filter assembly 5 drives the center tube to move up together, when the filter assembly 5 reaches the support frame 2 position, the filter residue on the upper side of the filter assembly 5 is manually cleaned; Step 3: After the cleaning is completed, the lifting device 8 drives the filter assembly 5 to move downward. After the filter assembly 5 passes through the threaded section, the holes of the first filter plate and the second filter plate are aligned again, which can prevent the filter assembly 5 from pressing garbage and sundries into the water. When the filter assembly 5 contacts the bottom support ring and breaks free from the magnetic restraint, it drives the intermediate pipe 3 to move downward together until the intermediate pipe 3 and the filter assembly 5 return to their initial positions; Step 4: Repeat Steps 1 to 3 to achieve the cleaning of garbage.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in terms of form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A groundwater level monitoring device, characterized in that: It includes a wellbore, a support frame fixed at the opening at the upper end of the wellbore, an intermediate tube coaxially installed at the center of the wellbore, a liquid level sensor installed on the inner side of the intermediate tube, and a filter assembly slidably matched with the inner wall of the wellbore, the intermediate tube cooperates with the support frame and extends downward along the axial direction of the wellbore, an open groove is axially provided on the tube wall of the intermediate tube, and the open groove can connect the inner cavity of the intermediate tube with the wellbore, the upper end of the liquid level sensor is connected to the support frame, and a through hole is provided in the center of the filter assembly for the intermediate tube to pass through; the filter assembly is also connected to a lifting device, which is installed at the upper end of the support frame and can drive the filter assembly to move axially along the wellbore.

2. A groundwater level monitoring device according to claim 1, characterized in that: The outer side of the intermediate tube is provided with an upper limit piece, a middle limit piece and a lower limit piece, the filter assembly is installed between the middle limit piece and the lower limit piece, the support frame is located between the upper limit piece and the middle limit piece, and the intermediate tube is slidably matched with the support frame.

3. A groundwater level monitoring device according to claim 2, characterized in that: The filter assembly includes an outer movable disk and an inner rotating disk, and the outer movable disk and the inner rotating disk are respectively provided with a first filter hole and a second filter hole, the first filter hole and the second filter hole correspond to each other, the outer movable disk is slidably matched with the inner side of the wellbore, a limiting groove is formed on the lower side of the outer movable disk, the inner rotating disk is rotatably installed in the limiting groove, the through hole is formed in the center of the outer movable disk, the outer side of the intermediate tube is provided with an external thread, the external thread is arranged between the middle limiting piece and the lower limiting piece, the inner rotating disk cooperates with the external thread, and the output end of the lifting assembly is connected to the outer movable disk.

4. A groundwater level monitoring device according to claim 3, characterized in that: A lower magnetic block is arranged at the center of the lower side of the support frame, and an upper magnetic block corresponding to the lower magnetic block is arranged on the upper side of the middle limiter.

5. A groundwater level monitoring device according to claim 4, characterized in that: The lower limit member comprises a sleeve, which is sleeved on the lower end of the intermediate tube and cooperates with the external thread. The covered length of the external thread can be changed by rotating the sleeve.

6. A groundwater level monitoring device according to any one of claims 2 to 5, characterized in that: A central hole is opened at the center of the support frame, a rubber ring is fixedly installed on the inner side of the central hole, and the intermediate tube is installed in the rubber ring.

7. A groundwater level monitoring device according to claim 6, characterized in that: A guide block is fixed on the support frame, and the guide block is slidably matched with one of the opening grooves.

8. A groundwater level monitoring device according to claim 7, characterized in that: The lifting device comprises a motor and a screw rod, wherein the motor is fixed at the upper end of the wellbore, the output end of the motor is connected to the screw rod, and the screw rod is threadedly connected to the filter assembly.

9. A method for monitoring groundwater level, characterized in that: The water level monitoring device according to any one of claims 6 to 8 comprises the following steps: Step 1: When in use, the central tube is placed on the upper support frame under the action of gravity, the filter assembly is located below the water surface, and the filter assembly is positioned at the lowest end of the intermediate tube through the bottom support ring. At this time, the first filter hole and the second filter hole are aligned to form a through hole with a larger aperture, which can facilitate the bottom garbage to float to the upper side of the filter assembly through the aligned holes; Step 2: Start the lifting device. The filter assembly moves upward under the action of the lifting device. When the filter assembly passes through the threaded section of the middle tube, the inner rotating disk rotates relative to the outer moving disk. The first filter hole and the second filter hole are staggered to form a filter hole with a smaller aperture, which can intercept the garbage at the bottom. After the filter assembly contacts the middle support ring, the filter assembly drives the center tube to move upward together. When the filter assembly reaches the support frame position, the filter residue on the upper side of the filter assembly is manually cleaned; Step 3: After cleaning, the lifting device drives the filter assembly to move downward. After the filter assembly passes through the threaded section, the holes of the first filter plate and the second filter plate are aligned again, which can prevent the filter assembly from pressing garbage and debris into the water. When the filter assembly contacts the bottom support ring, it breaks free from the magnetic restraint and drives the middle tube to move downward together until the middle tube and the filter assembly return to the initial position. Step 4: Repeat steps 1 to 3 to clean up the garbage.

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