Buried water supply pipeline leakage acoustic-electric combined detection device and test method

Abstract

The invention belongs to the technical field of experimental devices, and discloses an acoustic-electric combined detection device for leakage of a buried water supply pipeline and a test method. Comprising a filling box, a water supply pipeline is fixed to the lower end of the filling box, and a leakage hole is formed in the middle of the water supply pipeline; the sound signal sensor is arranged above the soil and is used for acquiring a vibration sound signal in the leakage process in real time; the pressure-sensitive sensor is arranged in the soil and is used for acquiring the internal pressure change at the key time point of soil structure damage; the temperature and humidity sensor is fixedly connected to the inner wall of the top end of the soil filling box and used for obtaining temperature and humidity changes in the soil filling box; the electrical detection sensor comprises two electrode patches, the two electrode patches are fixedly connected to the inner walls of the two sides of the soil filling box and used for measuring the soil structure and property, various parameters during leakage of the water supply pipeline are collected and monitored in real time through the sensor, and then the leakage sound wave propagation rule of the water supply pipeline in the composite soil body is explored.

Description

Technical Field

[0001] The invention belongs to the technical field of experimental devices, and in particular relates to a buried water supply pipeline leakage combined acoustic and electrical detection device and a testing method. Background Art

[0002] Water supply pipes are all pressurized pipes. If a leak occurs, a continuous vibration acoustic wave signal is generated at the leak site. This acoustic wave signal is generated by the outward flow of water from the leak point, which then interacts with the pipe, radiating energy from the sound source to form acoustic waves. These acoustic waves primarily include friction between the water and the leak, impact sound, and collision sound with the medium. Only by correctly understanding the characteristics of leak acoustic signals and their propagation within pipes, and adopting appropriate signal processing methods, can the accuracy of leak detection and location be fundamentally addressed and improved. Common water supply pipes include cast iron and plastic pipes. When a leak occurs, the pressurized fluid within the pipe ejects a multiphase turbulent jet, disrupting the normal flow of the fluid and causing collisions with the pipe. This propagates within the pipe, generating vibration waves with a wide frequency spectrum. However, due to the damping effect of the pipe wall, only certain frequencies can propagate over long distances. In practical engineering, the complex structure and diverse forms of liquid-filled pipe systems present significant challenges for researchers. Using reasonable assumptions to simplify the model facilitates research. Therefore, simulating the actual composite soil environment and leakage source in the laboratory to explore the propagation patterns of sound waves from water supply pipe leaks within composite soils is undoubtedly a feasible approach. Simulation experiments also suffer from the inability to display some experimental data in real time, requiring extensive data analysis after the experiment. The experimental process cannot be visualized in 3D, and the integration of sensor data and experimental equipment status cannot present changes in the experimental environment in real time.

[0003] In view of this, the present invention provides a combined acoustic and electrical detection device and testing method for underground water supply pipeline leakage, aiming to solve the technical problems in the above-mentioned related technologies. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a device and method for detecting leakage of buried water supply pipelines using combined acoustic and electrical methods, which solve the problems in the background art.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A combined acoustic and electrical detection device for underground water supply pipeline leakage, comprising:

[0007] A soil filling box, wherein the lower end of the soil filling box is fixedly connected to a water supply pipe, both ends of the water supply pipe pass through the side walls on both sides of the soil filling box and extend outward, and a leakage hole is opened in the middle of the water supply pipe;

[0008] Four acoustic signal sensors, each of which is fixedly connected to a fixing rod at equal intervals, and the fixing rod is fixedly connected to the upper end of the soil filling box. The acoustic signal sensors are placed above the soil and are used to obtain vibration and acoustic signals of the leakage process in real time;

[0009] A pressure-sensitive sensor is placed inside the soil to detect changes in internal pressure at key points in time when the soil structure is damaged;

[0010] A temperature and humidity sensor is fixedly connected to the inner wall of the top of the soil filling box and is used to obtain temperature and humidity changes inside the soil filling box;

[0011] The electrical detection sensor includes two electrode patches, which are fixedly connected to the inner walls on both sides of the soil filling box and are used to measure the soil structure and properties.

[0012] Furthermore, a cover plate is hingedly connected to the top of the soil filling box, and an open plate is hingedly connected to the bottom of the soil filling box.

[0013] Furthermore, the upper end of the cover plate is fixedly connected to a bracket, and a dehumidification drying tube and a vacuum pump are fixedly connected to the bracket. One end of the dehumidification drying tube is fixedly connected to a first air pipe, and the other end of the first air pipe is connected to the interior of the soil filling box. The other end of the dehumidification drying tube is fixedly connected to a second air pipe, and the other end of the second air pipe is fixedly connected to the air inlet end of the vacuum pump. The air outlet end of the vacuum pump is fixedly connected to a third air pipe, and the other end of the third air pipe is connected to the interior of the soil filling box.

[0014] Furthermore, a heating plate is fixedly connected to the inner wall of the soil filling box.

[0015] Furthermore, a fan is fixedly connected to the outer wall of the soil filling box.

[0016] Furthermore, a temperature and humidity detection display is fixedly connected to the outer wall of the soil filling box, and the temperature and humidity detection display is electrically connected to the temperature and humidity sensor.

[0017] Furthermore, it includes a frame, the filling box is fixedly connected to the upper end of the frame, the lower end of the frame is fixedly connected to a water tower and a water pump, the water pump and the water tower are connected through a pipe, and the water pump and one end of the water supply pipe are connected through a pipe.

[0018] Furthermore, a conveying frame is provided on one side of the frame, and both ends of the upper end of the conveying frame are rotatably connected to conveying rollers, a conveyor belt is sleeved between the two conveyor rollers, one end of the conveyor belt is provided directly below the filling box, and a drying box is provided at the other end of the conveyor belt.

[0019] Furthermore, one end of one of the conveying rollers is fixedly connected to the output end of the motor, and the motor is fixedly connected to the conveying frame.

[0020] A method for testing a buried water supply pipeline leakage combined acoustic and electrical detection device, the buried water supply pipeline leakage combined acoustic and electrical detection device comprising the following steps:

[0021] First, fill the soil box with soil and the water tower with water;

[0022] Secondly, the water pump is started to transport the water in the water tower to the water supply pipe through the pipe; the resistivity of the soil is measured by four acoustic signal sensors, the pressure of the water supply pipe exerted by the soil is measured by a pressure-sensitive sensor, the temperature and humidity of the soil are measured by a temperature and humidity sensor, and the soil structure and properties are measured by an electrical detection sensor. At the same time, the vacuum pump is started, allowing the moist air in the soil filling box to enter the dehumidification drying pipe through the first air pipe. The dehumidification drying pipe is equipped with a dehumidifying desiccant, which absorbs moisture in the air and enters the soil filling box through the second and third air pipes to absorb moisture inside the box. At the same time, the heating plate is connected to the power supply, and the heating effect of the heating plate is used to dry and reuse the soil.

[0023] Finally, start the motor to drive the conveyor roller connected to it to rotate, and the conveyor roller drives the conveyor belt to drive, open the open plate at the bottom of the filling box, and the soil inside the filling box falls onto the conveyor belt. The conveyor belt drives the moist soil to the drying box for drying.

[0024] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0025] A fixed connection is a connection in which parts or components are fixed without any relative movement. There are two types of connections: detachable and non-detachable.

[0026] (1) A removable connection is a method of fastening components together using screws, splines, wedge pins, etc. This type of connection allows for disassembly during maintenance without damaging the components. However, the connectors used must be of the correct specifications (e.g., length of bolts, keys, wedge pins) and properly tightened.

[0027] (2) Non-detachable connections mainly refer to welding, riveting, and tenoning. Since they require forging, sawing, or oxygen cutting to disassemble during repair or replacement, spare parts generally cannot be reused. At the same time, when making connections, attention should be paid to workmanship quality, technical inspection, and remedial measures (such as calibration, polishing, etc.).

[0028] A threaded connection refers to a detachable connection in which the connected parts are connected together using a threaded part (or the threaded part of the connected parts).

[0029] A sliding connection is when two objects are in contact but not fixed and can slide relative to each other.

[0030] A rotational connection is a connection between parts that allows the parts to rotate relative to each other.

[0031] Beneficial effects of the present invention:

[0032] 1. This invention simulates the actual composite soil environment and leakage source in the laboratory and installs acoustic signal sensors, pressure sensors, temperature and humidity sensors, and electrical detection sensors to collect and monitor various parameters of water supply pipeline leakage in real time. It then explores the propagation law of sound waves when water supply pipeline leakage occurs in composite soil, and promotes the development of water supply pipeline leakage detection technology.

[0033] 2. The present invention sets a wet drying tube and a vacuum pump, starts the vacuum pump, and allows the moist air in the filling box to enter the dehumidification drying tube through the first air pipe. The dehumidification drying tube is provided with a dehumidifying desiccant to absorb moisture in the air and enter the filling box through the second air pipe and the third air pipe, so that the air in the filling box is continuously circulated, absorbing the moisture in the box, achieving the effect of dehumidification and dewatering, and ensuring the dryness of the experimental environment.

[0034] 3. The present invention fixes a heating plate on the inner wall of the soil filling box. When the heating plate is connected to a power source, the soil can be dried and reused through the heating effect of the heating plate, reducing the tedious work caused by constantly changing the soil and greatly improving the work efficiency of this experiment.

[0035] The present invention sets a conveyor belt below the soil filling box and sets a drying box at the other end of the conveyor belt. When the opening plate at the bottom of the soil filling box is opened, the soil inside the soil filling box falls onto the conveyor belt. The conveyor belt drives the wet soil to the drying box for drying, which is convenient for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 This is a front view schematic diagram of the overall structure of an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the overall structure of the embodiment of the present invention from the back;

[0039] Figure 3 Schematic diagram of the distribution of sensors inside the soil filling box according to an embodiment of the present invention;

[0040] Figure 4 FIG. 4 is a schematic diagram of the distribution of sensors relative to the soil according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] Example 1

[0044] like Figure 1-4 As shown, a combined acoustic and electrical detection device for underground water supply pipeline leakage includes:

[0045] Filling box 1, the lower end of the filling box 1 is fixedly connected to a water supply pipe 2, both ends of the water supply pipe 2 pass through the side walls on both sides of the filling box 1 and extend outward, and a leakage hole is opened in the middle of the water supply pipe 2;

[0046] Four acoustic signal sensors 3 are fixedly connected to a fixing rod 4 at equal intervals. The fixing rod 4 is fixedly connected to the upper end of the soil filling box 1. The acoustic signal sensors 3 are placed above the soil and are used to obtain vibration and acoustic signals of the leakage process in real time;

[0047] The pressure-sensitive sensor 5 is placed inside the soil and is used to obtain the internal pressure changes at the key time point of soil structure destruction;

[0048] The temperature and humidity sensor 6 is fixedly connected to the inner wall of the top of the soil filling box 1 and is used to obtain the temperature and humidity changes inside the soil filling box 1 to ensure the uniformity of the soil properties in each experiment;

[0049] The electrical detection sensor 7 includes two electrode patches, which are fixedly connected to the inner walls on both sides of the soil filling box 1 and are used to measure the soil structure and properties.

[0050] The present invention simulates the actual composite soil environment and leakage source in the laboratory, and installs acoustic signal sensors, pressure sensors, temperature and humidity sensors, and electrical detection sensors to collect and monitor various parameters of water supply pipeline leakage in real time. It then explores the propagation law of sound waves when water supply pipeline leakage in composite soil, and promotes the development of water supply pipeline leakage detection technology.

[0051] In one embodiment of the present invention, a cover plate 8 is hingedly connected to the top of the soil filling box 1, and an open plate is hingedly connected to the bottom of the soil filling box 1. When the experiment is completed, the soil inside the soil filling box 1 is mixed with water, making it impossible to continue the experiment. Therefore, the soil inside the soil filling box 1 needs to be replaced. At this time, the open plate is opened and the soil inside the soil filling box 1 can be removed.

[0052] In one embodiment of the present invention, a bracket 10 is fixedly connected to the upper end of the cover plate 8, to which a dehumidifying drying tube 11 and a vacuum pump 12 are fixedly connected. One end of the dehumidifying drying tube 11 is fixedly connected to a first air pipe 13, the other end of which is connected to the interior of the soil filling box 1. The other end of the dehumidifying drying tube 11 is fixedly connected to a second air pipe 14, the other end of which is fixedly connected to the air inlet of the vacuum pump 12. The air outlet of the vacuum pump 12 is fixedly connected to a third air pipe 15, the other end of which is connected to the interior of the soil filling box 1. When in use, the vacuum pump 12 is started, allowing the humidified air in the soil filling box 1 to enter the dehumidifying drying tube 11 through the first air pipe 13. The dehumidifying drying tube 11 is provided with a dehumidifying desiccant, which absorbs moisture from the air and then enters the soil filling box 1 through the second air pipe 14 and the third air pipe 15. This application achieves the effect of dehumidification and water removal by allowing the air in the soil filling box 1 to circulate continuously and absorb moisture from the box, thereby ensuring a dry experimental environment.

[0053] In one embodiment of the present invention, a heating plate 16 is fixedly connected to the inner wall of the soil filling box 1. When in use, the heating plate 16 is connected to a power source. Through the heating effect of the heating plate 16, the soil is dried and reused, reducing the tedious work caused by constantly changing the soil and greatly improving the work efficiency of this experiment.

[0054] In one embodiment of the present invention, a fan 17 is fixedly connected to the outer wall of the soil filling box 1. The fan 17 channel is connected to the interior of the soil filling box 1 to accelerate the air flow inside the soil filling box 1 to ensure the dryness of the soil in each experiment.

[0055] In one embodiment of the present invention, a temperature and humidity detection display is fixedly connected to the outer wall of the soil filling box 1 , and the temperature and humidity detection display is electrically connected to the temperature and humidity sensor 6 , so as to display the temperature and humidity of the soil in the soil filling box 1 .

[0056] One embodiment of the present invention includes a frame 19, with a soil filling box 1 fixedly connected to the upper end of the frame 19. A water tower 20 and a water pump 21 are fixedly connected to the lower end of the frame 19. The water pump 21 is connected to the water tower 20 via a pipe, and the water pump 21 is connected to one end of the water supply pipe 2 via a pipe. When in use, the water pump 21 is started to transfer water from the water tower 20 to the water supply pipe 2 through the pipe.

[0057] The water pump 21 in this application is a constant pressure variable frequency water pump 21. A display screen is provided on the water pump 21 to directly display the water pressure in the pipeline. The experiment uses a STM32F103C8T6 single-chip microcomputer, an LCD1602 liquid crystal display, and a 4-point Hall flowmeter as the sensor. The low-level pulse signal sensed by the Hall sensor is obtained through the IO port with external interrupt of the STM32F103C8T6, and the flow rate, flow rate, and cumulative flow rate are realized by conversion.

[0058] In one embodiment of the present invention, a conveyor frame 22 is provided on one side of the frame 19. Conveyor rollers 23 are rotatably connected to both ends of the upper end of the conveyor frame 22. A conveyor belt 24 is interposed between the two conveyor rollers 23. One end of the conveyor belt 24 is positioned directly below the soil filling box 1, and the other end of the conveyor belt 24 is provided with a drying box 26. During use, the opening panel at the bottom of the soil filling box 1 is opened, and the soil inside the soil filling box 1 falls onto the conveyor belt 24. The conveyor belt 24 then drives the moist soil to the drying box 26 for drying, facilitating its recycling.

[0059] In one embodiment of the present invention, one end of a conveying roller 23 is fixedly connected to the output end of a motor 25, and the motor 25 is fixedly connected to the conveying frame 22. When in use, the conveying roller 23 connected thereto is driven to rotate by the motor 25, and the conveying roller 23 drives the conveyor belt 24 to transmit, thereby conveying soil.

[0060] Example 2

[0061] A method for testing a buried water supply pipeline leakage combined acoustic and electrical detection device comprises the following steps:

[0062] First, fill the soil box 1 with soil and fill the water tower 20 with water;

[0063] Next, the water pump 21 is started to transport the water in the water tower 20 to the water supply pipe 2 through the pipe. The resistivity of the soil is measured by four acoustic signal sensors, the pressure of the soil on the water supply pipe 2 is measured by a pressure-sensitive sensor, the temperature and humidity of the soil are measured by a temperature and humidity sensor, and the soil structure and properties are measured by an electrical detection sensor. At the same time, the vacuum pump 12 is started, allowing the moist air in the soil filling box 1 to enter the dehumidification drying pipe 11 through the first air pipe 13. The dehumidification drying pipe 11 is provided with a dehumidifying desiccant, which absorbs moisture in the air. The dehumidification desiccant then enters the soil filling box 1 through the second air pipe 14 and the third air pipe 15 to absorb moisture inside the box. At the same time, the heating plate 16 is powered on, and the heating effect of the heating plate 16 is used to dry and reuse the soil.

[0064] Finally, the motor 25 is started to drive the conveyor roller 23 connected thereto to rotate, and the conveyor roller 23 drives the conveyor belt 24 to transmit, opening the open plate at the bottom of the soil filling box 1, and the soil inside the soil filling box 1 falls onto the conveyor belt 24. The wet soil is transported to the drying box 26 for drying through the transmission of the conveyor belt 24.

[0065] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0066] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A combined acoustic and electrical detection device for underground water supply pipeline leakage, characterized in that: include: A soil filling box (1), wherein the lower end of the soil filling box (1) is fixedly connected to a water supply pipe (2), both ends of the water supply pipe (2) penetrate the side walls on both sides of the soil filling box (1) and extend outward, and a leakage hole is opened in the middle of the water supply pipe (2); Four acoustic signal sensors (3), the four acoustic signal sensors (3) being fixedly connected to a fixing rod (4) at equal intervals, the fixing rod (4) being fixedly connected to the upper end of the soil filling box (1), the acoustic signal sensors (3) being placed above the soil and used for obtaining vibration acoustic signals of the leakage process in real time; A pressure-sensitive sensor (5), the pressure-sensitive sensor (5) being placed inside the soil and used to obtain internal pressure changes at key time points of soil structure destruction; A temperature and humidity sensor (6), the temperature and humidity sensor (6) being fixedly connected to the inner wall of the top of the soil filling box (1) and used for acquiring temperature and humidity changes inside the soil filling box (1); The electrical detection sensor (7) comprises two electrode patches, which are fixedly connected to the inner walls on both sides of the soil filling box (1) and are used to measure the soil structure and properties.

2. The buried water supply pipeline leakage combined acoustic and electrical detection device according to claim 1 is characterized in that: The top of the soil filling box (1) is hinged with a cover plate (8), and the bottom of the soil filling box (1) is hinged with an open plate.

3. The buried water supply pipeline leakage combined acoustic and electrical detection device according to claim 2, characterized in that: The upper end of the cover plate (8) is fixedly connected to a bracket (10), and a dehumidifying drying pipe (11) and a vacuum pump (12) are fixedly connected to the bracket (10). One end of the dehumidifying drying pipe (11) is fixedly connected to a first air pipe (13), and the other end of the first air pipe (13) is connected to the interior of the earth filling box (1). The other end of the dehumidifying drying pipe (11) is fixedly connected to a second air pipe (14), and the other end of the second air pipe (14) is fixedly connected to the air inlet end of the vacuum pump (12). The air outlet end of the vacuum pump (12) is fixedly connected to a third air pipe (15), and the other end of the third air pipe (15) is connected to the interior of the earth filling box (1).

4. The buried water supply pipeline leakage combined acoustic and electrical detection device according to claim 3 is characterized in that: A heating plate (16) is fixedly connected to the inner wall of the soil filling box (1).

5. The buried water supply pipeline leakage combined acoustic and electrical detection device according to claim 4 is characterized in that: The outer wall of the soil filling box (1) is fixedly connected with a fan (17).

6. The buried water supply pipeline leakage combined acoustic and electrical detection device according to claim 5, characterized in that: A temperature and humidity detection display is fixedly connected to the outer wall of the soil filling box (1), and the temperature and humidity detection display is electrically connected to the temperature and humidity sensor (6).

7. The buried water supply pipeline leakage combined acoustic and electrical detection device according to claim 6, characterized in that: The invention comprises a frame (19), wherein the soil filling box (1) is fixedly connected to the upper end of the frame (19), and the lower end of the frame (19) is fixedly connected to a water tower (20) and a water pump (21), wherein the water pump (21) is connected to the water tower (20) through a pipeline, and the water pump (21) is connected to one end of a water supply pipeline (2) through a pipeline.

8. The device for combined acoustic and electrical detection of buried water supply pipeline leakage according to claim 7, characterized in that: A conveying frame (22) is provided on one side of the frame (19), and both ends of the upper end of the conveying frame (22) are rotatably connected to conveying rollers (23), a conveying belt (24) is sleeved between the two conveying rollers (23), one end of the conveying belt (24) is provided just below the filling box (1), and the other end of the conveying belt (24) is provided with a drying box (26).

9. The device for combined acoustic and electrical detection of buried water supply pipeline leakage according to claim 8, characterized in that: One end of one of the conveying rollers (23) is fixedly connected to the output end of the motor (25), and the motor (25) is fixedly connected to the conveying frame (22).

10. A method for testing a buried water supply pipeline leakage combined acoustic and electrical detection device, using the buried water supply pipeline leakage combined acoustic and electrical detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: First, fill the soil box (1) with soil and fill the water tower (20) with water; Secondly, the water pump (21) is started to transport the water in the water tower (20) to the water supply pipe (2) through the pipeline; the resistivity of the soil is measured by four acoustic signal sensors, the pressure of the water supply pipe (2) on the soil is measured by a pressure-sensitive sensor, the temperature and humidity of the soil are measured by a temperature and humidity sensor, and the soil structure and properties are measured by an electrical detection sensor. At the same time, the vacuum pump (12) is started to allow the moist air in the soil filling box (1) to enter the dehumidification drying pipe (11) through the first air pipe (13). The dehumidification drying pipe (11) is provided with a dehumidification desiccant to absorb moisture in the air and enter the soil filling box (1) through the second air pipe (14) and the third air pipe (15) to absorb moisture in the box; at the same time, the heating plate (16) is connected to the power supply, and the heating plate (16) is used to increase the temperature, so that the soil is dried and reused; Finally, the motor (25) is started to drive the conveying roller (23) connected thereto to rotate, and the conveying roller (23) drives the conveyor belt (24) to drive, and the open plate (9) at the bottom of the filling box (1) is opened, and the soil inside the filling box (1) falls onto the conveyor belt (24). The wet soil is transported to the drying box (26) for drying through the transmission of the conveyor belt (24).

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