Buried pipeline leakage detection device

Abstract

The utility model discloses a buried pipeline leak detection device, which comprises a sound acquisition device and a sound generating device, the sound generating device is led in from an upper branch of a buried pipeline, floats into the buried pipeline and can flow along with water flow in the pipeline, the sound generating device is provided with generating equipment, and the generating equipment is connected with the sound acquisition device. Low and medium frequency sound can be emitted; the sound collection device is located on the ground and can detect the frequency emitted by the sound generation device. When pipeline leakage exists, the sound generating device can flow to the leakage position along with water flow, low and medium frequency sounds with different frequencies are detected through the sound collecting device, good penetrability is achieved, attenuation of the sounds in soil is weakened, and the detection accuracy can be improved by detecting the sound with the specific frequency; and meanwhile, interference of environmental noise on detection can be effectively reduced, accurate and rapid positioning of the pipeline leakage point is achieved, and the construction amount is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline leakage detection, in particular to a buried pipeline leakage detection device. Background Art

[0002] Pipelines are important carriers for fluid transmission. Water, steam, natural gas, oil, etc. can all be transported through pipelines. Compared with other modes of transportation, such as roads and railways, pipeline transportation has the advantages of large transportation volume, continuity, stability, low energy consumption, and low operating costs.

[0003] Due to ground space limitations and aesthetic reasons, a large number of pipelines are laid underground. However, due to corrosion, pipeline aging, construction quality, ground subsidence and other reasons, underground pipelines may leak, resulting in waste of resources and financial losses. At present, the leak detection technology for underground pipelines mainly measures the vibration signal of the pipeline at both ends of the pipeline at the same time, and determines the distance between the leak point and the two measuring points based on the time difference of the vibration signal. This method can effectively monitor leaks, but it has many noise and leaks, poor anti-interference ability when there are few leaks, and poor effect when the pipeline has multiple branches.

[0004] The prior art with patent announcement number CN209672074U discloses a pressure pipeline leak locating device, which specifically discloses that "one end of the first pipeline is an inlet end, and the other end is used to communicate with the pipeline to be tested, and a pressure controller and a first pump are provided on the first pipeline; one end of the second pipeline is an inlet end, and the other end is used to communicate with the pipeline to be tested, and a pressure detector and a second pump are provided on the second pipeline; the locator includes a spherical body and a positioning component, the positioning component is used to transmit a position signal and includes a plurality of positioning chips; the detector is used to determine the leak position of the pipeline to be tested according to the detected position signal outside the pipeline to be tested", wherein the above technology adopts a locator, and the locator is driven to move by an external pump, and the diameter of the locator is larger than the pipe diameter, such a setting results in the need for manual control of the detection, the accuracy of moving to the leak position is not high, and the effect is poor when the pipeline is connected to multiple branches, and the detection is achieved by detecting the chip in the locator, but the external environmental noise will interfere with it, thereby affecting the accuracy of the detection position.

[0005] The prior art with patent announcement number CN209165049U discloses a device for detecting and locating pipeline leaks, which specifically discloses that "a first connecting water pipe is connected to one end of the pipeline to be detected, and a main switch, a pressure detection device and a water pump are arranged on the first connecting water pipe in sequence from the water inlet end to the end connected to the pipeline to be detected; a second connecting water pipe is connected to the other end of the pipeline to be detected, and a pressure gauge and a drain valve are arranged on the second connecting water pipe; a positioning chip is encapsulated therein, and the cross-sectional diameter of the rubber plug is slightly larger than the inner diameter of the pipeline to be detected, and the rubber plug is used to block the leak on the pipeline to be detected; the detector is used to detect the position of the positioning chip, and then locate the position of the leak on the pipeline to be detected", wherein the technology uses a rubber plug, and the rubber plug is driven to move by an external pump, and the diameter of the rubber plug is larger than the pipe diameter. Such a setting requires manual control for detection, and the accuracy of moving to the leak position is not high, and the effect is poor when the pipeline is connected to multiple branches. The detection is achieved by detecting the chip in the detector, but the external environmental noise will interfere with it, thereby affecting the accuracy of the detection position. Utility Model Content

[0006] The technical problem to be solved by the utility model is: how to realize the effective detection of the leakage point of the buried pipeline and avoid the problems of external interference and poor detection effect of the branch pipe.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A buried pipeline leak detection device includes a sound collection device and a sound generating device. The sound generating device is introduced from a branch on the buried pipeline and suspended inside the buried pipeline and can flow with the water flow inside the pipeline. The sound generating device is provided with a generating device and can emit medium and low frequency sounds simultaneously.

[0009] The sound collecting device is located on the ground and can detect the sound frequency emitted by the sound generating device.

[0010] The present application places a sound generating device into a pipeline. When there is a pipeline leak, the sound generating device will flow to the leak with the water flow. Then, the sound collecting device will detect the medium and low frequency sounds of different frequencies emitted by the sound generating device. The sound generating device can emit medium and low frequency sounds of different frequencies, has good penetration, and reduces the attenuation of sound in the soil. By detecting sounds of specific frequencies, the accuracy of detection can be improved. At the same time, the present application can also effectively reduce the interference of environmental noise on detection, thereby achieving accurate and rapid positioning of pipeline leaks and reducing the amount of construction. The present utility model has a simple structure, is easy to operate, and is easy to promote.

[0011] As a further solution of the utility model: the buried pipeline includes a main line and branch lines 1 and 2 connected to the main line, branch valves 1 and 2 are respectively provided on branch lines 1 and 2, and a main line valve is provided on the main line and between branch lines 1 and 2.

[0012] As a further solution of the utility model: the sound collection device includes a soundproof cover and a microphone arranged inside the soundproof cover, the upper part of the soundproof cover is connected to the signal processor through a bracket, and the microphone is connected to the signal processor through a signal transmission line inside the bracket.

[0013] As a further solution of the utility model: the sound insulation cover adopts an inner and outer double-layer arc-shaped cover structure, and the middle is filled with sound insulation material.

[0014] As a further solution of the utility model: the inner wall of the sound insulation enclosure is smooth and has a parabolic structure.

[0015] As a further solution of the utility model: the microphone is installed at the focus of the sound insulation enclosure.

[0016] As a further solution of the utility model: the sound generating device includes a shell and a power supply device, a sound generating device 1 and a sound generating device 2 arranged inside the shell, wherein the power supply device, the sound generating device 1 and the sound generating device 2 are installed in series through a wire.

[0017] As a further solution of the utility model: the shell is spherical and made of waterproof material.

[0018] As a further solution of the utility model: the sound-generating device 1 and the sound-generating device 2 can respectively emit medium and low frequency sounds of different frequencies.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] First, the present application sets a sample adding port in the sample adding pipeline between two branches, and puts a sound generating device into the pipeline through the sample adding port. When there is a pipeline leak, the sound generating device will flow to the leaking place with the water flow, and then the sound collecting device will detect the medium and low frequency sounds of different frequencies emitted by the sound generating device. The sound generating device can emit medium and low frequency sounds of different frequencies, has good penetration, and reduces the attenuation of sound in the soil. By detecting the sound of a specific frequency, the accuracy of the detection can be improved. At the same time, the present application can also effectively reduce the interference of environmental noise on the detection, realize the accurate and rapid positioning of the pipeline leak point, and reduce the construction amount. The utility model has a simple structure, is easy to operate, and is easy to promote.

[0021] Secondly, the soundproof enclosure of the present application has a double-layer structure, with sound insulation material filled in the middle and a smooth parabolic inner wall. The microphone is placed at the focus of the soundproof enclosure. This design makes it easy for the microphone to receive signals from the sound generating device and resist interference from external noise, making it easier to collect sound, thereby improving the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a buried pipeline leak detection device according to an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the sound generating device of an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the sound collection device according to an embodiment of the utility model;

[0025] Description of reference numerals:

[0026] 1. Pipeline regulating unit; 11. Water pump; 12. Main pipeline valve; 13. Branch valve 1; 14. Branch valve 2; 15. Sample adding port; 16. Pressure gauge; 17. User end valve;

[0027] 2. Sound collection device; 21. Sound insulation cover; 22. Microphone; 23. Bracket; 24. Signal transmission line; 25. Signal processor;

[0028] 3. Sound generating device; 31. Housing; 32. Power supply device; 33. Sound generating device 1; 34. Sound generating device 2. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Reference Figure 1 A buried pipeline leak detection device includes a pipeline adjustment unit 1, a sound collection device 2 and a sound generating device 3. The sound generating device 3 is introduced into the buried pipeline to determine the pipeline leakage point. The sound collection device 2 is placed on the ground, and the sound collection device 2 performs frequency detection on the sound generating device 3 to determine the location of the leakage point.

[0031] Reference Figure 1The pipeline regulating unit 1 includes a water pump 11, a main pipeline valve 12, a branch valve 13, a branch valve 2 14, a sample addition port 15, a pressure gauge 16, and a user-end valve 17, wherein the pressure gauge 16 is installed on the main pipeline behind the water pump 11, and the main pipeline valve 12 is installed on the main pipeline. The branch 1 and the branch 2 are connected on the main pipeline, and the branch valve 13 and the branch valve 2 14 are respectively arranged on the branch 1 and the branch 2. The sample addition pipeline is connected between the branch 1 and the branch 2, and the sample addition port 15 is arranged on the sample addition pipeline; the branch valve 13, the branch valve 2 14 and the sample addition port 15 are all installed on the branch pipeline, and the sample addition port 15 is sealed with a flange and can be disassembled at any time when used; the main pipeline also includes a user-end mother pipe connected to the user, and the user-end mother pipe is provided with a user-end valve 17 to realize the cutting off and opening of the water flow to the user end.

[0032] Reference Figure 1 and Figure 2 The sound collection device 2 includes a soundproof cover 21, a microphone 22, a bracket 23, a signal transmission line 24, and a signal processor 25. The upper part of the soundproof cover 21 is connected to the signal processor 25 through the bracket 23, and the microphone 22 is connected to the signal processor 25 through the signal transmission line 24 inside the bracket 23.

[0033] Furthermore, the soundproof cover 21 adopts an inner and outer double-layer arc-shaped cover structure, in which the soundproof material is filled. Since the soundproof cover 21 adopts a parabolic arc-shaped cover and has built-in soundproof material, it can play an anti-interference effect on external environmental noise;

[0034] Furthermore, the upper part of the soundproof enclosure 21 is connected to the bracket 23. The inner wall of the soundproof enclosure 21 is smooth and has a parabolic structure. The microphone 22 is fixed in the middle of the soundproof enclosure 21, and one end of the microphone 22 is located at the focus of the parabolic soundproof enclosure 21, which is convenient for receiving, anti-interference, and convenient for sound collection, and the microphone 22 is connected to the signal processor 25 through a signal transmission line 24.

[0035] Reference Figure 1 and Figure 3 The sound generating device 3 includes a housing 31, a power supply device 32, a sound generating device 1 33 and a sound generating device 2 34. The overall density of the sound generating device 3 is close to that of water, and the density can be adjusted by fine-tuning to be suspended in water. The housing 31 is spherical and made of a light and waterproof material.

[0036] Furthermore, the power supply device 32, the sound device 1 33 and the sound device 2 34 are fixed in the housing 31, and the three are installed in series through wires. The power supply device 32 is a detachable structure and can be disassembled at any time as needed, and the gap between the power supply device 32 and the housing 31 is waterproof.

[0037] It should be noted that the sound-emitting device 1 33 and the sound-emitting device 2 34 can respectively emit medium and low frequency sounds of different frequencies and have good penetration, which can make the detection accuracy of the sound collection device 2 high, reduce the attenuation of sound in the soil, and locate the leakage point by collecting sounds of two different frequencies, thereby better reducing signal interference.

[0038] The specific operating principles of this application are as follows:

[0039] After confirming that there is a water leak in the pipeline, keep the water pump 11 and the main pipeline valve 12 open, close the branch valve 13, the branch valve 2 14 and the sampling port 15 to ensure that there is water in the pipeline; then slowly open the sampling port 15, release the pressure and collect the outflowing water, put the sound generating device 3 into the collected water, and adjust its density by continuously adjusting the mass of the sound generating device 3 until the sound generating device 3 can be suspended in the water.

[0040] Then put the adjusted sound generating device 3 into the sample adding port 15, and then close the sample adding port 15. Close the user end valve 17, open the branch valve 2 14 and the branch valve 1 13, close the main pipeline valve 12, and then the sound generating device 3 is brought into the pipeline with the water flow generated by the pipeline leakage, and moves to the leakage point with the water flow. During this period, the water pump 11 is guaranteed to operate normally and the pipeline pressure is maintained stable.

[0041] After running for a period of time, start the sound collection device 2, lay it above the ground along the position of the pipeline, and place the sound insulation cover 21 close to the ground. When the signal processor 25 detects the sounds of corresponding frequencies emitted by the sound device 1 33 and the sound device 2 34 at the same time, the leakage point can be determined.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A buried pipeline leak detection device, characterized in that: The invention comprises a sound collecting device (2) and a sound generating device (3), wherein the sound generating device (3) is introduced from a branch on the underground pipeline and suspended inside the underground pipeline and can flow along with the water flow inside the pipeline, and the sound generating device (3) is provided with a generating device and can generate medium and low frequency sounds simultaneously; The sound collecting device (2) is located on the ground and is capable of detecting the sound frequency emitted by the sound generating device (3).

2. The underground pipeline leak detection device according to claim 1, characterized in that: The underground pipeline comprises a main pipeline and a branch line 1 and a branch line 2 connected to the main pipeline, a branch line valve 1 (13) and a branch line valve 2 (14) are respectively arranged on the branch line 1 and the branch line 2, and a main pipeline valve (12) is arranged on the main pipeline and between the branch line 1 and the branch line 2.

3. The underground pipeline leak detection device according to claim 1, characterized in that: The sound collecting device (2) comprises a soundproof enclosure (21) and a microphone (22) arranged inside the soundproof enclosure (21); the upper portion of the soundproof enclosure (21) is connected to a signal processor (25) via a bracket (23); and the microphone (22) is connected to the signal processor (25) via a signal transmission line (24) inside the bracket (23).

4. The underground pipeline leak detection device according to claim 3, characterized in that: The sound insulation cover (21) adopts an inner and outer double-layer arc-shaped cover structure, with the middle part filled with sound insulation material.

5. The underground pipeline leak detection device according to claim 4, characterized in that: The inner wall of the sound insulation cover (21) is smooth and has a parabolic structure.

6. The underground pipeline leak detection device according to claim 4, characterized in that: The microphone (22) is installed at the focus of the sound insulation enclosure (21).

7. The underground pipeline leak detection device according to claim 1, characterized in that: The sound generating device (3) comprises a housing (31), and a power supply device (32), a first sound generating device (33) and a second sound generating device (34) arranged inside the housing (31), wherein the power supply device (32), the first sound generating device (33) and the second sound generating device (34) are installed in series via a wire.

8. The underground pipeline leak detection device according to claim 7, characterized in that: The shell (31) is spherical and made of waterproof material.

9. The underground pipeline leak detection device according to claim 7, characterized in that: The sound-generating device 1 (33) and the sound-generating device 2 (34) can respectively emit medium and low frequency sounds of different frequencies.

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