Leak detection apparatus for natural gas pipeline operational maintenance

Abstract

The utility model relates to natural gas pipeline maintenance technical field discloses the leakage detection device for natural gas pipeline operation maintenance, including arc magnetic attraction base, arc magnetic attraction base inboard is equipped with the magnetic piece for adsorbing pipeline, still includes arc guide rail, detection slider, double sensor module, data processing module, arc magnetic attraction base inboard middle part is equipped with arc mounting groove, and the magnetic piece symmetrical distribution is at the both sides of arc mounting groove, and arc guide rail is fixed in arc mounting groove. Compared with prior art, the advantage lies in: through the combination of arc magnetic attraction quick -mounting structure and double sensor cooperative detection structure's design, the quick installation positioning of different pipe diameter pipeline, the high accuracy quick detection of pipeline outer wall methane leakage are realized to the cooperation of two, the cooperation of micro -step motor and gear, tooth slot can drive detection slider accurate movement along arc guide rail, realizes the comprehensive coverage detection of pipeline circumferential direction.

Description

Technical Field

[0001] This utility model relates to the field of natural gas pipeline maintenance technology, specifically to a leak detection device used for the operation and maintenance of natural gas pipelines. Background Technology

[0002] Leak detection devices used for the operation and maintenance of natural gas pipelines are key equipment for ensuring pipeline safety in natural gas transmission systems. They mainly detect methane leaks on the outer wall of the pipeline through sensors, and, in conjunction with a moving structure, achieve comprehensive detection in the circumferential direction of the pipeline. They are widely used in the daily maintenance and leak investigation of urban gas pipelines, long-distance natural gas pipelines, and other places.

[0003] Existing natural gas pipeline leak detection devices, to meet basic detection needs, typically employ a combination of fixed bracket installation and single-sensor detection. However, significant problems arise in practical use: most devices use rigid, fixed brackets, requiring replacement with brackets of corresponding specifications or repeated adjustments of fixing components when adapting to pipelines of different diameters. This is cumbersome and time-consuming, resulting in low installation efficiency. Furthermore, some devices use only a single type of methane sensor. While infrared methane sensors offer high detection accuracy, their response speed is slow; semiconductor methane sensors, although fast-responding, are susceptible to environmental interference, leading to insufficient detection stability. A single sensor cannot simultaneously achieve both detection accuracy and response speed. In addition, some devices lack limit protection for the movement of detection components, making them prone to displacement or detachment during movement, affecting detection coverage and safety. Therefore, those skilled in the art provide a leak detection device for natural gas pipeline operation and maintenance to address the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to provide a leak detection device for the operation and maintenance of natural gas pipelines, thereby solving the problems in the prior art.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: a leak detection device for the operation and maintenance of natural gas pipelines, including an arc-shaped magnetic base, a magnetic component for adsorbing the pipeline is provided on the inner side of the arc-shaped magnetic base, and also includes an arc-shaped guide rail, a detection slider, a dual sensor module, and a data processing module.

[0006] The arc-shaped magnetic base has an arc-shaped mounting groove in the middle of its inner side. Magnetic components are symmetrically distributed on both sides of the arc-shaped mounting groove. The arc-shaped guide rail is fixed in the arc-shaped mounting groove. The inner wall of the arc-shaped guide rail has a toothed groove. The detection slider is slidably set in the arc-shaped mounting groove. The bottom of the detection slider has a gear that meshes with the toothed groove.

[0007] The dual-sensor module and the data processing module are installed inside the detection slider. The dual-sensor module includes an infrared methane sensor and a semiconductor methane sensor, and the data processing module is electrically connected to the infrared methane sensor and the semiconductor methane sensor, respectively.

[0008] As a preferred embodiment of the above technical solution, a micro stepper motor is installed inside the detection slider. The output end of the micro stepper motor is connected to a gear, and the micro stepper motor is electrically connected to a data processing module to drive the detection slider to reciprocate along the arc-shaped guide rail.

[0009] As a preferred embodiment of the above technical solution, the inner side of the arc-shaped magnetic base is also provided with a buffer pad, which is attached to the side of the arc-shaped magnetic base that contacts the pipe.

[0010] As a preferred embodiment of the above technical solution, the two ends of the arc-shaped magnetic base are provided with docking buckles and slots, and the two symmetrical arc-shaped magnetic bases are quickly positioned and docked through the docking buckles and slots.

[0011] As a preferred embodiment of the above technical solution, the infrared methane sensor and the semiconductor methane sensor are arranged side by side, and the detection probes of both are facing the outer wall of the pipe, with the distance between the detection probes not exceeding the diameter range of the detection point on the outer wall of the pipe.

[0012] As a preferred embodiment of the above technical solution, the end of the detection slider near the side wall of the arc-shaped mounting groove is provided with a limiting slider, and the arc-shaped mounting groove is provided with a limiting groove that is slidably connected to the limiting slider. When the arc-shaped magnetic bases on both sides are joined together, the limiting grooves are joined to form a complete annular groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention overcomes the limitations of existing devices with fixed bracket installation and single sensor detection by combining an arc-shaped magnetic quick-installation structure with a dual-sensor collaborative detection structure. The two work together to achieve rapid installation and positioning on pipelines of different diameters and high-precision rapid detection of methane leaks on the pipeline's outer wall. This effectively avoids the problems of cumbersome installation and adjustment, and the difficulty in balancing detection accuracy and response speed, significantly improving the stability and efficiency of natural gas pipeline leak detection and ensuring detection quality. The combination of the arc-shaped magnetic base with docking clips and slots, along with the magnetic attraction, allows for rapid installation and removal of the device on the pipeline without additional tools. The arc-shaped structure design adapts to different pipe diameters, reducing bracket replacement steps, significantly shortening installation time, and improving operational efficiency.

[0015] The dual-sensor module, with its side-by-side infrared and semiconductor methane sensors, leverages the high precision of the infrared sensor and the rapid response of the semiconductor sensor. The data processing module's comprehensive analysis of the two detection data streams further enhances the accuracy and reliability of leak detection. A micro stepper motor, combined with gears and grooves, drives the detection slider to move precisely along the arc-shaped guide rail, achieving comprehensive circumferential coverage of the pipeline and eliminating blind spots. A buffer pad protects the pipeline's outer wall during installation, preventing scratches or wear from direct contact between the arc-shaped magnetic base and the pipeline. The combination of a limiting slider and a limiting groove ensures stable movement of the detection slider on the arc-shaped guide rail, preventing deviation or detachment during movement and improving the safety of the detection process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall assembly of this utility model.

[0017] Figure 2 This is an exploded schematic diagram of this utility model.

[0018] Figure 3 This is a cross-sectional view of the present invention. Figure 1 .

[0019] Figure 4 This is a utility model Figure 3 An enlarged schematic diagram of the structure at point A.

[0020] Figure 5 This is an exploded view of the detection slider of this utility model.

[0021] Figure 6 This is a schematic diagram of the assembly structure of the detection slider of this utility model.

[0022] As shown in the figure: 1. Arc-shaped magnetic base; 11. Magnetic component; 12. Arc-shaped mounting groove; 121. Limiting slide groove; 13. Buffer pad; 14. Connecting buckle; 15. Slot; 2. Arc-shaped guide rail; 21. Gear groove; 3. Detection slider; 31. Gear; 32. Limiting slider; 4. Infrared methane sensor; 41. Semiconductor methane sensor; 5. Data processing module; 6. Miniature stepper motor. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0024] Please see the appendix Figure 1 To be continued Figure 5 As shown, a leak detection device for the operation and maintenance of natural gas pipelines includes an arc-shaped magnetic base 1, with a magnetic component 11 for adsorbing the pipeline on the inner side of the arc-shaped magnetic base 1. It also includes an arc-shaped guide rail 2, a detection slider 3, a dual-sensor module, and a data processing module 5. The arc-shaped magnetic base 1 is used to achieve rapid adsorption and installation of the device on the pipeline. The dual-sensor module is used to detect methane leaks on the outer wall of the pipeline. The data processing module 5 is used to receive and analyze the sensor detection data. The detection slider 3 is used to drive the dual-sensor module to move along the circumference of the pipeline for detection.

[0025] An arc-shaped mounting groove 12 is provided in the middle of the inner side of the arc-shaped magnetic base 1. Magnetic components 11 are symmetrically distributed on both sides of the arc-shaped mounting groove 12. An arc-shaped guide rail 2 is fixed in the arc-shaped mounting groove 12. The inner wall of the arc-shaped guide rail 2 is provided with toothed grooves 21. The detection slider 3 is slidably disposed in the arc-shaped mounting groove 12. The bottom of the detection slider 3 is provided with a gear 31 that meshes with the toothed grooves 21. A dual-sensor module and a data processing module 5 are installed in the detection slider 3. The dual-sensor module includes an infrared methane sensor 4 and a semiconductor methane sensor 41. The data processing module 5 is electrically connected to the infrared methane sensor 4 and the semiconductor methane sensor 41, respectively.

[0026] The arc-shaped magnetic base 1 adapts to the curvature of the outer wall of the pipe. The magnetic component 11 provides adsorption force to fix the device on the pipe. The arc-shaped guide rail 2 provides guidance for the movement of the detection slider 3. The meshing of the gear 31 and the tooth groove 21 ensures that the detection slider 3 moves smoothly and accurately. The two detection data from the dual sensor module are comprehensively analyzed by the data processing module 5 to improve the accuracy of leak detection. The movement of the detection slider 3 realizes comprehensive detection in the circumferential direction of the pipe and avoids blind spots.

[0027] For an implementation method described in this embodiment, please refer to the appendix. Figure 3 Appendix Figure 4 As shown, a micro stepper motor 6 is installed inside the detection slider 3. The output end of the micro stepper motor 6 is connected to the gear 31, and the micro stepper motor 6 is electrically connected to the data processing module 5 to drive the detection slider 3 to reciprocate along the arc-shaped guide rail 2.

[0028] The micro stepper motor 6 receives the control signal from the data processing module 5 and drives the gear 31 to rotate. The gear 31 meshes with the tooth groove 21 to drive the detection slider 3 to move along the arc-shaped guide rail 2. The precise speed control characteristics of the stepper motor ensure that the movement speed of the detection slider 3 is stable. The movement speed can be adjusted by the data processing module 5 according to the detection requirements to achieve different detection accuracy requirements. The number of micro stepper motors 6 can be set according to the size of the detection slider 3, usually one, to ensure that the output torque meets the movement requirements, while avoiding occupying too much internal space of the detection slider 3.

[0029] For an implementation method described in this embodiment, please refer to the appendix. Figure 2 Appendix Figure 3 As shown, the inner side of the arc-shaped magnetic base 1 is also provided with a buffer pad 13, which is attached to the side of the arc-shaped magnetic base 1 that contacts the pipe.

[0030] The buffer pad 13 is made of elastic rubber, which can buffer the contact force between the device and the pipe when the arc-shaped magnetic base 1 is attached, preventing the outer wall of the pipe from being scratched or worn. The thickness of the buffer pad 13 should be designed according to the protection requirements of the outer wall of the pipe to ensure that it does not affect the attraction force of the magnetic component 11, while also playing an effective buffering role. The buffer pad 13 is connected to the arc-shaped magnetic base 1 by adhesive bonding to ensure a tight fit and prevent it from falling off during use.

[0031] For an implementation method described in this embodiment, please refer to [link / reference]. Figure 2 As shown, the two ends of the arc-shaped magnetic base 1 are provided with docking buckles 14 and slots 15. The two symmetrical arc-shaped magnetic bases 1 are quickly positioned and docked through the docking buckles 14 and slots 15.

[0032] The engagement of the locking buckle 14 and the slot 15 enables the rapid splicing of the two arc-shaped magnetic bases 1, allowing the device to adapt to pipes of different diameters. After splicing, a complete ring structure is formed, ensuring that the detection slider 3 can move completely along the circumference of the pipe. The number of locking buckles 14 should be set according to the length of the arc-shaped magnetic base 1, usually 2-3 at each end, to ensure the stability of the structure after splicing. The gap between the locking buckle 14 and the slot 15 must be strictly controlled to avoid loosening after splicing.

[0033] For an implementation method described in this embodiment, please refer to [link / reference]. Figure 5 Appendix Figure 6 As shown, the infrared methane sensor 4 and the semiconductor methane sensor 41 are arranged side by side, and the detection probes of both are facing the outer wall of the pipe. The distance between the detection probes is no greater than the diameter range of the detection point on the outer wall of the pipe.

[0034] The high precision of the infrared methane sensor 4 complements the fast response of the semiconductor methane sensor 41. They are arranged side by side so that they can detect the methane concentration in the same area. The distance between the detection probes is no greater than the diameter of the detection point to ensure that the detection areas overlap and avoid detection omissions. The distance between the detection probe and the outer wall of the pipe should be designed according to the detection range of the sensor, usually 5-10mm, to ensure stable detection signal and avoid interference from debris on the outer wall of the pipe.

[0035] For an implementation method described in this embodiment, please refer to [link / reference]. Figure 3 Appendix Figure 4As shown, the end of the detection slider 3 near the side wall of the arc-shaped mounting groove 12 is provided with a limiting slider 32. The arc-shaped mounting groove 12 is provided with a limiting groove 121 that is slidably connected to the limiting slider 32. When the arc-shaped magnetic bases 1 on both sides are joined together, the limiting grooves 121 are joined together to form a complete annular groove.

[0036] The cooperation between the limiting slider 32 and the limiting groove 121 restricts the movement direction of the detection slider 3, preventing the detection slider 3 from shifting left or right or falling off during movement, thus improving movement stability. The limiting sliders 32 are located at both ends of the detection slider 3 to ensure a balanced limiting effect. The length of the limiting groove 121 should be consistent with the length of the arc guide rail 2 to ensure that the detection slider 3 can move completely along the arc guide rail 2. At the same time, the annular groove after docking ensures that the detection slider 3 can achieve circumferential reciprocating movement.

[0037] In the specific implementation of this utility model: before use, check the connection status of the arc-shaped magnetic base 1, magnetic component 11, arc-shaped guide rail 2, detection slider 3, infrared methane sensor 4, semiconductor methane sensor 41, data processing module 5, and micro stepper motor 6 to ensure that all components are not loose and that the sensor detection function is normal.

[0038] Installation device: According to the diameter of the natural gas pipeline to be tested, take two arc-shaped magnetic bases 1, align the docking buckle 14 of one arc-shaped magnetic base 1 with the slot 15 of the other arc-shaped magnetic base 1, press to splice and fix the two to form a complete ring structure; attach the spliced ​​arc-shaped magnetic base 1 to the outer wall of the pipeline, ensuring that the buffer pad 13 is in contact with the outer wall of the pipeline, and the magnetic component 11 adsorbs the pipeline, so that the device is stably fixed on the pipeline.

[0039] Start the detection equipment: The data processing module 5 sends a control signal, the micro stepper motor 6 starts, drives the gear 31 to rotate, the gear 31 meshes with the tooth groove 21 to drive the detection slider 3 to move along the arc-shaped guide rail 2; during the movement of the detection slider 3, the detection probes of the infrared methane sensor 4 and the semiconductor methane sensor 41 detect the methane concentration on the outer wall of the pipeline in real time, and the detection data is transmitted to the data processing module 5 in real time; the data processing module 5 performs comprehensive analysis on the two detection data, and when the detected methane concentration exceeds the set threshold, it issues a leak alarm signal.

[0040] During the detection process, the limiting slider 32 slides along the limiting groove 121 to prevent the detection slider 3 from shifting or falling off; after the detection slider 3 moves to the end of the arc-shaped guide rail 2, the data processing module 5 controls the micro stepper motor 6 to reverse, driving the detection slider 3 to move in the opposite direction along the arc-shaped guide rail 2, realizing reciprocating detection in the circumferential direction of the pipeline to ensure comprehensive coverage.

[0041] After the test is completed, turn off the data processing module 5 and the micro stepper motor 6, separate the two arc-shaped magnetic bases 1 along the splice of the docking buckle 14 and the slot 15, and remove the device; if you need to continue testing other pipelines, repeat the above installation and testing steps; regularly check the status of each component, clean the detection probes of the infrared methane sensor 4 and the semiconductor methane sensor 41 to ensure detection accuracy, check whether the buffer pad 13 is worn, and replace it in time if necessary.

[0042] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A leak detection device for the operation and maintenance of natural gas pipelines, comprising a pair of arc-shaped magnetic bases (1), wherein the inner side of the arc-shaped magnetic bases (1) is provided with magnetic components (11) for adsorbing the pipeline, characterized in that: The arc-shaped magnetic base (1) has an arc-shaped mounting groove (12) in the middle of its inner side. The magnetic components (11) are symmetrically distributed on both sides of the arc-shaped mounting groove (12). An arc-shaped guide rail (2) is fixed in the arc-shaped mounting groove (12). The inner wall of the arc-shaped guide rail (2) is provided with a toothed groove (21). A detection slider (3) is slidably provided in the arc-shaped mounting groove (12). The bottom of the detection slider (3) is provided with a gear (31) that meshes with the toothed groove (21). The detection slider (3) is equipped with a dual sensor module and a data processing module (5). The dual sensor module includes an infrared methane sensor (4) and a semiconductor methane sensor (41). The data processing module (5) is electrically connected to the infrared methane sensor (4) and the semiconductor methane sensor (41), respectively.

2. The leak detection device for natural gas pipeline operation and maintenance according to claim 1, characterized in that: The detection slider (3) is equipped with a micro stepper motor (6). The output end of the micro stepper motor (6) is connected to the gear (31), and the micro stepper motor (6) is electrically connected to the data processing module (5) to drive the detection slider (3) to move back and forth along the arc-shaped guide rail (2).

3. The leak detection device for natural gas pipeline operation and maintenance according to claim 1, characterized in that: The inner side of the arc-shaped magnetic base (1) is also provided with a buffer pad (13), which is attached to the side of the arc-shaped magnetic base (1) that contacts the pipe.

4. The leak detection device for natural gas pipeline operation and maintenance according to claim 1, characterized in that: The two ends of the arc-shaped magnetic base (1) are provided with docking buckles (14) and slots (15). The two symmetrical arc-shaped magnetic bases (1) are quickly positioned and docked through the docking buckles (14) and slots (15).

5. The leak detection device for natural gas pipeline operation and maintenance according to claim 1, characterized in that: The infrared methane sensor (4) and the semiconductor methane sensor (41) are arranged side by side, and the detection probes of both are facing the outer wall of the pipe. The distance between the detection probes is no greater than the diameter range of the detection point on the outer wall of the pipe.

6. The leak detection device for natural gas pipeline operation and maintenance according to claim 1, characterized in that: The detection slider (3) is provided with a limiting slider (32) at the end near the side wall of the arc-shaped mounting groove (12). The arc-shaped mounting groove (12) is provided with a limiting groove (121) that is slidably connected to the limiting slider (32). When the arc-shaped magnetic bases (1) on both sides are joined together, the limiting grooves (121) are joined together to form a complete annular groove.

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