A detection system for gas leaks

Abstract

The utility model relates to a gas delivery equipment technical field, concretely relates to a kind of detection system for gas leakage, including gas pipeline and control room, detection module is arranged between the gas pipeline and control room, the detection module includes intercepting device and alarm device, the intercepting device includes the capture zone located above gas pipeline, leakage detector is set on the capture zone, gas pipeline can be monitored in real time, all-weather monitoring is carried out to pipeline by capture zone, to minimize artificial patrol error and miss, timely discover leakage risk and hidden danger point, avoid serious accident after gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of gas transmission equipment technology, and specifically to a gas leak detection system. Background Technology

[0002] Natural gas, as a clean and efficient energy source, is widely used in industrial production, commercial operations, and daily life, becoming a crucial energy carrier supporting socio-economic development and ensuring people's livelihoods. However, natural gas is inherently flammable and explosive, and its transportation relies heavily on a vast and complex gas pipeline network. This network covers a wide area and is laid in diverse environments, including deeply buried pipelines beneath main urban roads, exposed pipelines in industrial parks, and branch pipelines in residential areas. Over long-term use, gas pipelines are susceptible to various factors such as geological subsidence, pipeline corrosion, construction disturbance, and aging wear, leading to decreased pipeline sealing and ultimately, gas leaks.

[0003] Gas leaks not only cause significant energy waste but also pose serious safety hazards. When leaked gas mixes with air, it easily forms an explosive mixture. If it encounters an ignition source such as a flame or electrical spark, it can trigger explosions, fires, and other catastrophic accidents, causing casualties and enormous property damage. Furthermore, some components of the gas are toxic, potentially causing lasting harm to the surrounding environment and human health after a leak. In recent years, safety accidents caused by gas pipeline leaks have occurred frequently both domestically and internationally. These accidents not only severely impact the affected families but also pose a serious threat to public safety. Therefore, achieving accurate and timely detection of gas pipeline leaks has become a core issue that urgently needs to be addressed in the field of gas safety management.

[0004] Currently, gas pipeline leak detection mainly relies on the traditional manual inspection method. This method typically involves inspectors carrying portable detection equipment and periodically checking pipelines along a pre-set route. However, this method has several insurmountable drawbacks: First, manual inspection is inefficient, limited by the inspectors' physical strength, walking speed, and inspection range. For long-distance, large-scale pipeline networks, it is difficult to achieve comprehensive, blind-spot-free coverage, easily leading to detection blind spots. Second, the detection results are greatly affected by human factors. The inspectors' sense of responsibility, professional competence, operational proficiency, and fatigue level all directly affect the accuracy of the detection. This not only easily leads to errors due to operational mistakes but may also cause potential leak risks to be overlooked, making it impossible to guarantee the stability of detection quality. Third, manual inspection is a periodic inspection with fixed time intervals, making it impossible to continuously monitor the pipeline's operating status. During the interval between two inspections, leaks may occur at any time, and these leaks often go undetected, missing the optimal time for intervention, leading to the expansion of the leak and potentially causing serious accidents.

[0005] To compensate for the shortcomings of manual inspections, some fields have begun to try automated detection technologies, such as sensor-based fixed-point detection devices and drone inspections. However, these technologies also have limitations: fixed-point detection devices can only monitor specific locations and cannot achieve continuous coverage of the entire pipeline, making it difficult to effectively detect pipeline leaks between two detection points; while drone inspections can improve inspection efficiency, they are greatly affected by weather conditions, terrain, signal interference, and other factors. In severe weather, complex terrain, or areas with signal shielding, their detection stability and accuracy will drop significantly, and they also cannot achieve all-weather real-time monitoring. Utility Model Content

[0006] To address the aforementioned issues, this utility model provides a gas leak detection system capable of real-time monitoring of gas pipelines. The system utilizes a capture belt for 24 / 7 monitoring, minimizing errors and missed detections during manual inspections, promptly identifying leak risks and potential hazards, and preventing serious accidents caused by gas leaks.

[0007] To achieve the above objectives, this utility model embodiment adopts the following technical solution: a gas leak detection system, comprising a gas pipeline and a control room, wherein a detection module is provided between the gas pipeline and the control room, the detection module comprising an interception device and an alarm device, the interception device comprising a trapping belt located above the gas pipeline, a leak detector being provided on the trapping belt, and the alarm device comprising a power supply pile, a signal transmission module and an alarm, wherein the signal transmission module is connected to the alarm and the control room respectively.

[0008] As a further improvement to the above technical solution: The trapping band is arc-shaped and extends to the outside of the gas pipeline at both ends, with the leak detector located at the apex of the arc of the trapping band.

[0009] The number of leak detectors is multiple, and they are evenly distributed along the length of the trapping zone.

[0010] The power supply piles are cathodic protection piles, and there are multiple power supply piles that are evenly distributed along the length of the gas pipeline.

[0011] The distance between two adjacent power supply piles is 1-3 kilometers.

[0012] A first filling layer is provided between the trapping strip and the gas pipeline, and a second filling layer is provided above the trapping strip.

[0013] The thickness of the first filling layer is 40-60 cm, and the thickness of the second filling layer is 20-40 cm.

[0014] The trapping strip includes a substrate, and extension plates located within a filling layer are provided at both ends of the substrate. One end of the extension plate is connected to the substrate, and the other end extends to the outside of the gas pipeline.

[0015] The extension plate is inclined and forms an angle of 5-10 degrees with the horizontal plane.

[0016] The lower surface of the extension plate is provided with a gas guide groove, and the lower surface of the substrate is provided with a collection groove, which is radially distributed with the leak detector as the center.

[0017] The beneficial effects of this utility model embodiment are as follows: The gas leak detection system includes a gas pipeline and a control room. A detection module is provided between the gas pipeline and the control room. The detection module includes an interception device and an alarm device. The interception device includes a collection belt located above the gas pipeline. A leak monitor is installed on the collection belt, which can monitor the gas pipeline in real time. The collection belt monitors the pipeline around the clock to minimize errors and missed detections during manual inspections, promptly detect leak risks and hidden dangers, and avoid serious accidents caused by gas leaks. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 This is a schematic diagram of the installation structure of the trapping belt in Example 1; Figure 3 This is a schematic diagram of the trapping belt structure in Example 2; Figure 4 This is a schematic diagram of the air guide groove in Example 2.

[0019] In the diagram: 1. Gas pipeline; 2. Control room; 3. Capture belt; 4. Leak detector; 5. Power supply pile; 6. Alarm; 7. Filling layer one; 8. Filling layer two; 9. Substrate; 10. Extension plate; 11. Gas guide channel; 12. Capture tank. Detailed Implementation

[0020] Example 1 Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0021] See Figure 1-2 The gas leak detection system of this embodiment includes a gas pipeline 1 and a control room 2. A detection module is provided between the gas pipeline 1 and the control room 2. The detection module includes an interception device and an alarm device. The interception device includes a trapping belt 3 located above the gas pipeline 1. A leak detector 4 is provided on the trapping belt 3. The alarm device includes a power supply pile 5, a signal transmission module and an alarm 6. The signal transmission module is connected to the alarm 6 and the control room 2 respectively.

[0022] The trapping zone 3 is arc-shaped and extends to the outside of the gas pipeline 1 at both ends. The leak detector 4 is located at the top of the arc of the trapping zone 3.

[0023] Leak detector 4 employs multiple QM-N5 gas-sensitive elements, evenly distributed along the length of the collection zone 3. Utilizing chemical and physical effects, it converts information about the gas (e.g., carbon monoxide, coal gas, liquefied petroleum gas) and its concentration into electrical signals. These signals are then processed by the circuit for monitoring, surveillance, and alarm functions. In a typical gas control alarm circuit using QM-N5 elements, when the gas concentration exceeds a certain value, the QM-N5 gas sensor comes into contact with the gas, causing its resistance to decrease. This results in a signal similar to a falling edge being generated at the port. The circuit automatically issues audible and visual alarm signals and displays different leakage levels on a digital display.

[0024] The power supply pile 5 adopts a cathodic protection column. There are multiple power supply piles 5, which are evenly distributed along the length of the gas pipeline 1. Their main function is to provide power to the leak detector 4, the alarm 6, and the signal transmission module. The signal transmission module can transmit the leak signal to the control room 2 or the mobile terminal while activating the alarm 6.

[0025] The distance between two adjacent power supply piles 5 is 1-3 kilometers, and no more than 1 kilometer in urban areas. The specific laying distance should be determined according to the requirements. In areas affected by stray current interference, the distance should be increased.

[0026] A filling layer 7 is provided between the trapping belt 3 and the gas pipeline 1, and a filling layer 8 is provided above the trapping belt 3. The thickness of the filling layer 7 is 50 cm, and the thickness of the filling layer 8 is 30 cm.

[0027] During construction, the gas pipeline 1 is first pre-buried, then a 50 cm thick filling layer 7 is laid on top of the gas pipeline 1, then the trapping tape 3 is laid on the filling layer 7, and then a 30 cm thick filling layer 8 is laid on the trapping tape 3, thus completing the deep burial of the pipeline.

[0028] Example 2 The similarities with Example 1 will not be repeated here; the differences are as follows: Figure 3-4 As shown, the trapping belt 3 includes a base 9, which is arc-shaped or triangular in shape and has a shape that is narrow at the top and wide at the bottom, so that the gas can be collected at the top after a gas leak. The leak detector 4 is located at the center of the top. Both ends of the base 9 are provided with extension plates 10 located in the filling layer 7. One end of the extension plate 10 is connected to the base 9, and the other end extends to the outside of the gas pipeline 1.

[0029] The extension plate 10 is inclined and forms an angle of 8 degrees with the horizontal plane. Its length is 2 / 3 of the diameter of the gas pipeline 1. The lowermost end of the extension plate 10 is located at the bottom of the gas pipeline 1, and the uppermost end is flush with the center line of the gas pipeline 1. This design can not only support the base 9 and prevent it from deforming, but also the extension plates on both sides will be squeezed inward and downward (i.e., towards the oblique lower part of the pipeline) by the filling layer 2 8. After being subjected to pressure, the further contraction will improve the covering effect of the gas pipeline 1 and more efficiently detect the leak source.

[0030] The lower surface of the extension plate 10 is provided with a gas guiding groove 11, and the lower surface of the base 9 is provided with a collection groove 12. The collection groove 12 is radially distributed with the leak detector 4 as the center. The width of the gas guiding groove 11 and the collection groove 12 are both 0.5 mm, and the depth is 1 / 2 of the thickness of the extension plate 10 and the base 9, respectively. Without affecting the structural strength, the leaked gas can be better collected in the event of a leak, and then the gas guiding groove 11 and the collection groove 12 can be used to transmit the gas to the leak detector 4 more quickly, so as to determine the leak source more quickly and further reduce the occurrence and expansion of safety hazards.

[0031] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0034] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A gas leak detection system, comprising a gas pipeline (1) and a control room (2), characterized in that, A detection module is provided between the gas pipeline (1) and the control room (2), and the detection module includes an interception device and an alarm device; The interception device includes a trapping strip (3) located above the gas pipeline (1), and a leak detector (4) is installed on the trapping strip (3). The alarm device includes a power supply pile (5), a signal transmission module and an alarm (6), and the signal transmission module is connected to the alarm (6) and the control room (2) respectively.

2. The gas leak detection system according to claim 1, characterized in that, The trapping band (3) is arc-shaped and extends to the outside of the gas pipeline (1) at both ends. The leak detector (4) is located at the top of the arc of the trapping band (3).

3. The gas leak detection system according to claim 2, characterized in that, The number of leakage detectors (4) is multiple, and they are evenly distributed along the length of the trapping belt (3).

4. The gas leak detection system according to claim 1, characterized in that, The power supply pile (5) adopts a cathodic protection column, and the number of power supply piles (5) is multiple and they are evenly distributed along the length direction of the gas pipeline (1).

5. The gas leak detection system according to claim 4, characterized in that, The distance between two adjacent power supply piles (5) is 1-3 kilometers.

6. The gas leak detection system according to any one of claims 1-5, characterized in that, A filling layer 1 (7) is provided between the trapping strip (3) and the gas pipeline (1), and a filling layer 2 (8) is provided above the trapping strip (3).

7. The gas leak detection system according to claim 6, characterized in that, The thickness of the first filling layer (7) is 40-60 cm, and the thickness of the second filling layer (8) is 20-40 cm.

8. The gas leak detection system according to claim 6, characterized in that, The trapping strip (3) includes a substrate (9), and extension plates (10) located in the filling layer (7) are provided at both ends of the substrate (9). One end of the extension plate (10) is connected to the substrate (9), and the other end extends to the outside of the gas pipeline (1).

9. The gas leak detection system according to claim 8, characterized in that, The extension plate (10) is inclined and forms an angle of 5-10 degrees with the horizontal plane.

10. The gas leak detection system according to claim 9, characterized in that, The lower surface of the extension plate (10) is provided with a gas guide groove (11), and the lower surface of the substrate (9) is provided with a collection groove (12). The collection groove (12) is radially distributed with the leak detector (4) as the center.

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