Dynamic underground water level measuring device

Abstract

The utility model relates to an underground water level dynamic measuring device, which comprises a monitoring pipe fixed in a monitoring well, and a gland fixed at the upper end of the monitoring pipe, and is technically characterized in that an ultrasonic water level gauge is suspended in the center of the top surface of the gland, and a reducing cylinder corresponding to the ultrasonic water level gauge is arranged on the inner wall of the monitoring pipe; the detection end of the ultrasonic water level gauge penetrates through the lower end of the reducing cylinder, a connecting ring is arranged on the outer wall of the ultrasonic water level gauge, a damp-proof protective membrane with stretching allowance is connected between the connecting ring and the lower end of the reducing cylinder, a protective cover is fixed to the top of the gland, and a processor connected with the output end of the ultrasonic water level gauge is fixed to the top face of the gland. A tilt angle sensor is additionally arranged in the protective cover and connected with a processor, and the processor is provided with a wireless transmission module. Compared with the prior art, the device adopts the ultrasonic water level gauge, does not depend on a floating unit, and is simple in structure, good in protection performance and long in service life.

Description

Technical Field

[0001] This utility model relates to the technical field of groundwater level monitoring equipment, specifically to a dynamic groundwater level measurement device. Background Technology

[0002] Dynamic groundwater level measurement is beneficial for ensuring water resource security. By monitoring changes in groundwater levels, we can understand the reserves, distribution, and development and utilization status of groundwater resources, providing a scientific basis for formulating reasonable water resource management policies. It also helps prevent geological disasters, as excessive groundwater extraction can lead to land subsidence, ground fissures, and other geological hazards. Dynamic measurement can help detect anomalies in a timely manner and take corresponding measures to prevent disasters. Real-time monitoring of groundwater level changes helps to achieve the rational development and utilization of water resources, meeting the needs of human socio-economic development while protecting the ecological environment and achieving sustainable development. In conclusion, dynamic groundwater level measurement plays a vital role in water resource management, geological disaster prevention, ecological protection, and sustainable development.

[0003] CN 219935062 U discloses a groundwater level dynamic monitoring device, which includes a monitoring component installed inside an excavated groundwater measurement well. The monitoring component includes a monitoring pipe sleeved inside the well casing and a monitoring unit installed inside the monitoring pipe. By employing an infrared ranging probe to measure the groundwater level, the set counterweight base rod can lower the center of gravity of the floating unit. The infrared ranging probe is powered by a battery, ensuring that the reflector is always horizontal, allowing the infrared ranging probe to work continuously and monitor real-time dynamic changes in the groundwater level. However, the following problems still exist: the infrared ranging probe needs to cooperate with the floating unit to achieve the function of measuring the water level, and is limited by whether the floating unit is working properly. Utility Model Content

[0004] The purpose of this invention is to provide a groundwater level dynamic measurement device with a reasonable structure and reliable use that solves the above-mentioned problems. It adopts an ultrasonic water level gauge, and compared with the prior art, it does not rely on a floating unit, has a simple structure, good protection performance, and long service life.

[0005] The technical solution of this utility model is:

[0006] A groundwater level dynamic measurement device includes a monitoring pipe fixed in a monitoring well, with a pressure cap fixed at the upper end of the monitoring pipe. The key technical features are: an ultrasonic level gauge is suspended at the center of the top surface of the pressure cap; a reduced-diameter cylinder corresponding to the ultrasonic level gauge is provided on the inner wall of the monitoring pipe; the detection end of the ultrasonic level gauge passes through the lower end of the reduced-diameter cylinder; a connecting ring is provided on the outer wall of the ultrasonic level gauge; a moisture-proof protective diaphragm with tensile allowance is connected between the connecting ring and the lower end of the reduced-diameter cylinder; a protective cover is fixed to the top of the pressure cap; a processor connected to the output end of the ultrasonic level gauge is fixed to the top surface of the pressure cap; an tilt sensor is also provided in the protective cover; the tilt sensor is connected to the processor; and the processor is equipped with a wireless transmission module.

[0007] The aforementioned groundwater level dynamic measurement device has a built-in filter plate at the bottom of the monitoring tube, and the filter plate is provided with a group of filter holes.

[0008] In the aforementioned groundwater level dynamic measurement device, the moisture-proof protective diaphragm is a circular diaphragm with a radius of R, and the distance between the ultrasonic water level gauge and the inner wall of the reduced-diameter cylinder is r, where R is greater than or equal to 3r.

[0009] In the aforementioned groundwater level dynamic measurement device, a clamping base is fixed on the top surface of the pressure cover, the output cable of the ultrasonic water level meter is positioned by the clamping base, and the end of the output cable is led out from the top of the clamping base and connected to the processor.

[0010] The beneficial effects of this utility model are:

[0011] 1. The ultrasonic water level gauge is used to detect the liquid level in the monitoring tube. Compared with the existing technology, it does not rely on a floating unit and has a simple structure.

[0012] 2. By connecting a moisture-proof protective diaphragm with tensile allowance between the outer wall of the ultrasonic level gauge and the reduced-diameter cylinder, the moisture-proof protective diaphragm does not interfere with the displacement of the ultrasonic level gauge when the monitoring tube is tilted. On the other hand, it prevents water vapor from rising and causing moisture to get on the output cable of the suspended ultrasonic level gauge. It has good protection performance and extends service life.

[0013] 3. The tilt sensor is used to monitor the vertical status of the monitoring tube in real time to detect whether it is tilted, so as to facilitate remote monitoring and timely correction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a diagram showing the working state of this utility model in an inclined state.

[0016] In the diagram: 1. Protective cover, 2. Pressure cap, 3. Reduced diameter cylinder, 4. Monitoring tube, 5. Filter plate, 6. Ultrasonic water level gauge, 7. Moisture-proof protective diaphragm, 8. Output cable, 9. Clamping base, 10. Tilt sensor, 11. Processor, 12. Liquid level. Detailed Implementation

[0017] The present invention will be described in detail with reference to the accompanying drawings.

[0018] like Figure 1 , Figure 2 As shown, the groundwater level dynamic measurement device includes a monitoring pipe 4 fixed in a monitoring well, and a pressure cap 2 is fixed to the upper end of the monitoring pipe 4.

[0019] An ultrasonic level gauge 6 is suspended from the center of the top surface of the pressure cap 2. A corresponding reduced-diameter cylinder 3 is provided on the inner wall of the monitoring tube 4. The detection end of the ultrasonic level gauge 6 passes through the lower end of the reduced-diameter cylinder 3. A connecting ring is provided on the outer wall of the ultrasonic level gauge 6. A moisture-proof protective diaphragm 7 with tensile allowance is connected between the connecting ring and the lower end of the reduced-diaphragm cylinder 3. In this embodiment, the moisture-proof protective diaphragm 7 is a circular diaphragm with a radius of R. The distance between the ultrasonic level gauge 6 and the inner wall of the reduced-diaphragm cylinder 3 is r, where R is greater than or equal to 3r.

[0020] A protective cover 1 is fixed to the top of the pressure cover 2. A processor 11 connected to the output end of the ultrasonic level gauge 6 is fixed to the top surface of the pressure cover 2. An tilt sensor 10 is also provided in the protective cover 1. The tilt sensor 10 is connected to the processor 11. The processor 11 is equipped with a wireless transmission module. In this embodiment, a clamping base 9 is fixed to the top surface of the pressure cover 2. The output cable 8 of the ultrasonic level gauge 6 is positioned by the clamping base 9. The end of the output cable 8 extends out of the top of the clamping base 9 and is connected to the processor 11.

[0021] The monitoring tube 4 has a built-in filter plate 5 at the bottom, and the filter plate 5 is provided with a group of filter holes.

[0022] Working principle:

[0023] In operation, the ultrasonic level gauge 6 emits ultrasonic waves into the liquid below. These waves are reflected by the liquid surface 12, and the echo is received by the probe and converted into an electrical signal, which is then transmitted to the processor 11. The processor 11 transmits the signal to a remote monitoring terminal via a wireless transmission module. Due to changes in the geological strata, the monitoring pipe 4 tilts, but the detection end of the suspended ultrasonic level gauge 6 remains downward, without affecting the measurement. Simultaneously, the tilt sensor 10 also sends a tilt signal to the processor 11, which transmits it to the remote monitoring terminal via the wireless transmission module for timely intervention by personnel.

[0024] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A groundwater level dynamic measurement device, comprising a monitoring pipe fixed in a monitoring well, wherein a pressure cap is fixed to the upper end of the monitoring pipe, characterized in that: An ultrasonic level gauge is suspended at the center of the top surface of the pressure cap. The inner wall of the monitoring tube is provided with a reduced-diameter cylinder corresponding to the ultrasonic level gauge. The detection end of the ultrasonic level gauge passes through the lower end of the reduced-diameter cylinder. A connecting ring is provided on the outer wall of the ultrasonic level gauge. A moisture-proof protective film with tensile allowance is connected between the connecting ring and the lower end of the reduced-diameter cylinder. A protective cover is fixed on the top of the pressure cap. A processor connected to the output end of the ultrasonic level gauge is fixed on the top surface of the pressure cap. An tilt sensor is also provided in the protective cover. The tilt sensor is connected to the processor. The processor is provided with a wireless transmission module.

2. The groundwater level dynamic measurement device according to claim 1, characterized in that: The monitoring tube has a built-in filter plate at the bottom, and the filter plate is provided with a group of filter holes.

3. The groundwater level dynamic measurement device according to claim 1, characterized in that: The moisture-proof protective film is a circular film with a radius of R. The distance between the ultrasonic water level gauge and the inner wall of the reduced-diameter cylinder is r, where R is greater than or equal to 3r.

4. The groundwater level dynamic measurement device according to claim 1, characterized in that: A clamping seat is fixed to the top surface of the pressure cap. The output cable of the ultrasonic level gauge is positioned by the clamping seat, and the end of the output cable is led out from the top of the clamping seat and connected to the processor.

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