A groundwater pressure monitoring device

Abstract

The utility model provides a kind of underground water pressure monitoring device, including pressure pipe, the lower end of pressure pipe is open, is equipped with osmometer at the bottom of pressure pipe, is equipped with clamping device for fixing osmometer on the lateral wall of pressure pipe, the clamping device includes multiple pressure rods for being screwed with pressure pipe, multiple pressure rods hold osmometer from multiple directions, and the outgoing line of osmometer is from the upper end of pressure pipe and goes out.The utility model is fixed by multiple directions setting pressure rod with rubber head and holds osmometer, avoid its because lower portion has pressure water change or upper portion pressure relief water flow swing leads to inaccurate measurement;Pressure pipe is designed as upper and lower two sections and is connected by flange, facilitate installation and later overhaul;Pressure gauge is set on the upper end of upper pressure pipe to realize on-site pressure reading and osmometer data calibration, set pressure relief water tap to guarantee safety during overhaul;Sealing plug is installed simultaneously at the place where osmometer signal line goes out, prevent underground water leakage in pipe and fix signal line position, overall solve the problem that traditional device is not fixed osmometer, improve the accuracy, convenience and stability of underground water pressure monitoring.

Description

Technical Field

[0001] This utility model relates to the field of water pressure monitoring technology, and in particular to a groundwater pressure monitoring device. Background Technology

[0002] Groundwater pressure monitoring is a crucial aspect of water conservancy projects, geological exploration, foundation pit support, and underground engineering construction. The accuracy of the monitoring data directly impacts project safety assessments, ground stability evaluations, and the rationality of anti-seepage and anti-buoyancy designs. For example, in water conservancy projects, monitoring groundwater pressure around the dam body is essential to prevent potential hazards such as leakage and piping. During foundation pit excavation, accurately understanding changes in groundwater pressure can prevent risks such as foundation pit collapse and surrounding ground subsidence. Therefore, reliable groundwater pressure monitoring devices are vital for the safe progress of various projects.

[0003] Currently, most existing groundwater pressure monitoring devices on the market consist of a pressure tube and a piezometer, which can basically realize the functions of groundwater pressure transmission and data acquisition. However, they generally have design flaws: First, existing devices do not have a dedicated fixed structure for the piezometer. The piezometer is usually placed directly inside the pressure tube. When the groundwater pressure fluctuates, the piezometer is prone to displacement or shaking with the water flow, resulting in unstable pressure signals collected by the sensor and failing to accurately reflect the actual groundwater pressure value. Second, when the pressure relief device (such as a drain tap) on the top of the device is opened to release pressure, the impact of the water flow will cause the outlet wire of the piezometer to change position, further interfering with the stable working state of the piezometer and aggravating the deviation of the measurement data. Third, some traditional pressure tubes adopt an integrated structure. When the piezometer malfunctions and needs to be repaired or replaced, the entire pressure tube must be completely removed from the monitoring hole. The operation process is cumbersome, which not only increases the workload and difficulty of construction personnel, but also causes the monitoring process to be interrupted, destroying the continuity of data acquisition and making it difficult to meet the long-term and stable monitoring needs.

[0004] The shortcomings of these existing technologies have led to frequent problems such as distorted monitoring data and inconvenient maintenance in the practical application of traditional groundwater pressure monitoring devices, which cannot provide reliable data support for engineering decisions. There is an urgent need for a groundwater pressure monitoring device that can effectively fix the piezometer, improve monitoring accuracy, and is easy to install and maintain, so as to make up for the deficiencies of existing technologies. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a groundwater pressure monitoring device that can accurately detect changes in groundwater pressure.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a groundwater pressure monitoring device, including a pressure pipe with an opening at the lower end, a piezometer at the bottom of the pressure pipe, and a clamping device for fixing the piezometer on the side wall of the pressure pipe. The clamping device includes multiple clamping rods threadedly connected to the pressure pipe, which clamp the piezometer from multiple directions. The piezometer's output wire passes through the upper end of the pressure pipe.

[0007] Preferably, the clamping rod is an internal hex bolt, and a bolt sleeve is provided inside the pressure tube. The clamping rod passes through the bolt sleeve and is threadedly connected to the bolt sleeve.

[0008] Preferably, the inner end of the clamping rod is provided with a rubber head.

[0009] Preferably, the clamping rods hold the piezometer from four directions.

[0010] Preferably, two clamping rods are provided in each direction.

[0011] Preferably, the pressure pipe includes an upper pressure pipe and a lower pressure pipe connected together.

[0012] Preferably, the upper pressure pipe and the lower pressure pipe are connected by a flange.

[0013] Preferably, a pressure gauge is provided at the upper end of the pressure tube.

[0014] Preferably, the upper end of the pressure pipe is provided with a pressure relief tap.

[0015] Preferably, the signal wire of the piezometer passes through the side wall at the upper end of the upper pressure tube, and a sealing plug is provided at the exit point. The sealing plug is a rubber plug, and a deformable through hole is provided in the middle of the rubber plug for the signal wire to pass through. The deformable through hole is closed when no force is applied.

[0016] This utility model provides a groundwater pressure monitoring device, which has the following beneficial effects: 1. Ensure measurement accuracy: The clamping device, consisting of multiple clamping rods, fixes the piezometer from multiple directions, preventing it from shaking due to pressure changes in the lower part of the water and avoiding inaccurate measurements caused by shaking. At the same time, a sealing plug is provided at the outlet of the piezometer, which prevents the piezometer from changing its outlet position with the water flow even when the pressure relief tap above drains water, further ensuring the accuracy of the measurement results.

[0017] 2. Improved Installation and Maintenance Convenience: The pressure pipe consists of an upper pressure pipe and a lower pressure pipe, connected by a flange. Compared to an integrated pressure pipe, this design facilitates on-site installation and sealing. When the piezometer or maintenance device needs to be inspected or repaired later, the flange can be directly disassembled to separate the pipe, eliminating the need for complete removal and making operation more convenient. Furthermore, the pressure relief faucet at the upper end of the upper pressure pipe can release high water pressure in the piezometer's hole during inspection or replacement, ensuring worker safety.

[0018] 3. Enhanced monitoring reliability and adaptability: The pressure gauge at the top of the pressure tube allows staff to view the pressure value inside the borehole in real time on-site, and can also be used to calibrate the piezometer values, avoiding misjudgments caused by the failure of a single monitoring element; the piezometer can be connected to an automated acquisition system to realize remote real-time viewing of pressure values, forming a dual mode of "on-site reading + remote monitoring" and "value calibration + real-time acquisition", adapting to the needs of different monitoring scenarios.

[0019] 4. Extend the service life of the device: The clamping rod is connected to the inner side of the pressure tube by a bolt sleeve thread, instead of tapping directly on the side wall of the pressure tube. This not only enhances the stability of the clamping rod, but also avoids damage to the side wall of the pressure tube due to direct force. At the same time, the rubber head on the inner end of the clamping rod can prevent scratching the piezometer when fixing it, protect the equipment, and extend the service life of the entire device. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the clamping device of this utility model; Figure 3 This is an exploded view of the clamping device of this utility model. Detailed Implementation

[0021] like Figure 1-3 As shown, a groundwater pressure monitoring device includes a pressure pipe with an opening at its lower end. A piezometer 1 is installed at the bottom of the pressure pipe, and a clamping device for fixing the piezometer 1 is provided on the side wall of the pressure pipe. The clamping device includes multiple clamping rods 2 threadedly connected to the pressure pipe. The multiple clamping rods 2 clamp the piezometer 1 from multiple directions, and the outlet wire of the piezometer 1 passes through the upper end of the pressure pipe. The multiple clamping rods fixing the piezometer from multiple directions prevent the piezometer from shaking due to pressure changes at the lower part or external interference, thus avoiding measurement deviations. Simultaneously, it ensures that the piezometer outlet wire passes through the upper end of the pressure pipe, ensuring a stable outlet position and further guaranteeing monitoring accuracy. This solves the problem of inaccurate measurements caused by the lack of a fixed piezometer in traditional devices.

[0022] Preferably, the clamping rod 2 is an internal hex bolt, and a bolt sleeve 3 is provided on the inner side of the pressure tube. The clamping rod 2 passes through the bolt sleeve 3 and is threadedly connected to the bolt sleeve 3. The internal hex bolt allows for precise adjustment of the clamping force with the aid of tools, making operation convenient. The bolt sleeve can replace direct tapping of the side wall of the pressure tube, which not only enhances the stability of the clamping rod connection but also avoids damage to the side wall of the pressure tube due to thread stress, extending the service life of the pressure tube, while ensuring the integrity of the external structure of the pressure tube.

[0023] Preferably, the inner end of the clamping rod 2 is provided with a rubber head 4. The rubber material has a cushioning effect, which can prevent the metal clamping rod from directly contacting the piezometer and causing scratches, thus protecting the piezometer from damage. At the same time, the friction of rubber is greater than that of metal, which can improve the fit between the clamping rod and the piezometer, making the clamping more secure and reducing the slight displacement of the piezometer in the clamped state.

[0024] Preferably, the clamping rod 2 clamps the piezometer from four directions. The four directions are symmetrically distributed, which can make the piezometer bear force evenly, avoid the tilting or displacement of the piezometer caused by clamping in one or a few directions, further improve the fixed stability of the piezometer, ensure that it is always in the optimal measurement posture, and reduce the measurement error caused by uneven force.

[0025] Preferably, two clamping rods 2 are provided in each direction. By using two rods to hold the piezometer in a single direction, the clamping force can be distributed, avoiding excessive pressure on the piezometer from a single rod; at the same time, the cooperation of the two rods can improve the fixing strength in that direction, prevent the piezometer from shifting along that direction, and enhance the overall fixing effect.

[0026] Preferably, the pressure pipe includes an upper pressure pipe 5 and a lower pressure pipe 6 connected together.

[0027] Preferably, the upper pressure pipe 5 and the lower pressure pipe 6 are connected by a flange 9. The disassembled structure facilitates on-site installation, especially in complex construction environments, allowing for separate transportation and assembly of the upper and lower pressure pipes, reducing the overall installation difficulty. Furthermore, during later maintenance, it is not necessary to remove the entire pressure pipe; only the upper or lower pressure pipe needs to be addressed, improving maintenance convenience. The flange connection also provides strong sealing.

[0028] Preferably, a pressure gauge 7 is provided at the upper end of the upper pressure pipe 5. The pressure gauge can display the pressure value inside the pipe in real time, which makes it convenient for staff to read the data intuitively on site without relying on the remote data of the piezometer; at the same time, the accuracy of the piezometer can be calibrated by comparing the pressure gauge value with the piezometer measurement value, avoiding misjudgment caused by the failure of a single monitoring element and improving the reliability of monitoring.

[0029] Preferably, the upper end of the pressure pipe 5 is provided with a pressure relief tap 8. When it is necessary to repair the device or replace the piezometer, opening the pressure relief tap can quickly release the high water pressure in the pipe, avoiding the safety risks to the staff caused by the high pressure environment; at the same time, it prevents high pressure water from impacting the equipment components and protects the piezometer, pressure pipe and other components from high pressure damage.

[0030] Preferably, the signal wire of the piezometer 1 exits through the side wall at the upper end of the upper pressure tube 5, and a sealing plug 10 is provided at the exit point. The sealing plug 10 is a rubber plug with a deformable through hole in the middle for the signal wire to pass through. The deformable through hole is closed when not under force. The sealing plug can effectively seal the gap where the signal wire exits, prevent groundwater leakage in the tube, ensure stable pressure in the tube, and not interfere with the measurement; at the same time, the sealing plug can fix the position of the signal wire, avoid the signal wire displacement caused by water flow impact, and thus prevent the piezometer from changing its state due to the pulling of the signal wire, ensuring stable monitoring.

[0031] The steps for using it are as follows: Connect the upper and lower pressure pipes with flanges, ensuring the interface is sealed, to form the main body of the pressure pipe.

[0032] Place the piezometer at the bottom of the lower pressure tube and secure it with two clamping rods from each of the four directions using the internal hex bolts (with rubber heads) on the side wall of the pressure tube. Pass the piezometer signal line through the upper side wall of the upper pressure tube and install a sealing plug at the exit point.

[0033] Install a pressure gauge and a pressure relief tap at the upper end of the pressure pipe to ensure that the pressure gauge is connected to the inside of the pipe and that the tap can be opened and closed flexibly.

[0034] The assembled pressure pipe is placed vertically into the groundwater area to be monitored (such as a monitoring borehole), so that the lower end of the pressure pipe contacts the groundwater, allowing the groundwater to enter the pipe and transmit pressure.

[0035] Staff can directly read the pressure value from the pressure gauge; the piezometer signal line can be connected to the automation system to remotely acquire monitoring data. The pressure gauge readings and piezometer data are compared periodically to calibrate the piezometer accuracy. When the piezometer needs repair or replacement, first open the pressure relief tap to release the high pressure in the pipe; remove the flange to separate the upper and lower pressure pipes; after repairing or replacing the piezometer, reassemble it and close the tap to resume monitoring.

[0036] This invention uses multi-directional clamping rods with rubber heads to fix the piezometer, preventing inaccurate measurements due to pressure changes at the bottom or sloshing of water during pressure relief at the top. The pressure pipe is designed as two sections connected by flanges for easy installation and maintenance. A pressure gauge is installed at the upper end of the upper pressure pipe to calibrate the on-site pressure reading with the piezometer data, and a pressure relief tap ensures safety during maintenance. A sealing plug is installed at the point where the piezometer signal line exits to prevent groundwater leakage and to fix the signal line position. Overall, this invention solves the problem of traditional devices not fixing the piezometer, improving the accuracy, convenience, and stability of groundwater pressure monitoring.

[0037] This device transmits groundwater pressure to a pressure measuring instrument, using a piezometer and a pressure gauge to monitor the groundwater pressure. The piezometer is integrated into an automated data acquisition system, allowing real-time monitoring of pressure values ​​in the software system. The pressure gauge is used for both on-site readings and calibration of the piezometer values.

[0038] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A groundwater pressure monitoring device, characterized in that: It includes a pressure tube with an opening at the lower end. A piezometer (1) is provided at the bottom of the pressure tube. A clamping device for fixing the piezometer (1) is provided on the side wall of the pressure tube. The clamping device includes multiple clamping rods (2) that are threaded to the pressure tube. The multiple clamping rods (2) clamp the piezometer (1) from multiple directions. The outlet wire of the piezometer (1) passes through the upper end of the pressure tube.

2. The groundwater pressure monitoring device according to claim 1, characterized in that: The clamping rod (2) is an internal hex bolt, and a bolt sleeve (3) is provided on the inner side of the pressure tube. The clamping rod (2) passes through the bolt sleeve (3) and is threadedly connected to the bolt sleeve (3).

3. The groundwater pressure monitoring device according to claim 1 or 2, characterized in that: The inner end of the clamping rod (2) is provided with a rubber head (4).

4. The groundwater pressure monitoring device according to claim 3, characterized in that: The clamping rod (2) clamps the piezometer from four directions.

5. The groundwater pressure monitoring device according to claim 4, characterized in that: Each direction is set with two clamping rods (2).

6. The groundwater pressure monitoring device according to claim 1, characterized in that: The pressure pipe includes an upper pressure pipe (5) and a lower pressure pipe (6) connected together.

7. The groundwater pressure monitoring device according to claim 6, characterized in that: The upper pressure pipe (5) and the lower pressure pipe (6) are connected by a flange (9).

8. The groundwater pressure monitoring device according to claim 5, characterized in that: A pressure gauge (7) is installed at the upper end of the upper pressure tube (5).

9. The groundwater pressure monitoring device according to claim 8, characterized in that: The upper end of the pressure pipe (5) is equipped with a pressure relief tap (8).

10. The groundwater pressure monitoring device according to claim 5, characterized in that: The signal line of the piezometer (1) passes through the side wall at the upper end of the upper pressure tube (5), and a sealing plug (10) is provided at the point of exit.

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