A flange oil and gas leak detection device

Abstract

This application relates to the field of flange oil and gas leak detection technology, and in particular to a flange oil and gas leak detection device, which includes a detection body, an air inlet hood, a detection element, a handheld assembly, and an exhaust fan. The detection body is connected to a positioning rod via a bending rod, which is telescopic and hinged, facilitating angle adjustment and adaptation to flanges of different sizes. The air inlet hood is flared and has a built-in filter, which, together with the exhaust fan, creates a negative pressure environment to ensure full contact between the detection element and the air surrounding the flange, improving detection accuracy. Furthermore, a laser emitter assists in calibration, and the handheld assembly features anti-slip textures to optimize the user experience. This application achieves the technical effects of comprehensive flange circumferential detection, improved detection accuracy, strong adaptability, and convenient operation.

Description

Technical Field

[0001] This application relates to the field of flange oil and gas leakage detection technology, and in particular to a flange oil and gas leakage detection device. Background Technology

[0002] Flange connections are widely used in the petrochemical industry for detachable connections in pipeline systems, and their sealing performance directly affects production safety. Statistics show that approximately 60% of pipeline leaks originate from flange seal failure. Currently, flange leak detection has become a crucial aspect of ensuring industrial safety. With the development of industrial technology, various detection methods have emerged, providing important support for improving detection efficiency and safety. To address flange leaks, existing technologies typically employ handheld detection devices for localized detection or fixed gas detectors for targeted monitoring. Handheld detection devices mainly consist of probes equipped with sensors, which operators must manually bring close to the flange surface for inspection; fixed gas detectors monitor the gas concentration in the surrounding environment through sensors installed at specific locations. Furthermore, some technologies attempt to combine IoT technology to monitor flanges using distributed sensor networks, but these methods still have limitations. However, the aforementioned conventional methods have revealed significant shortcomings in practical applications: handheld detection devices struggle to achieve full circumferential detection of the flange sealing surface, easily missing potential leak points; while fixed detectors are limited by installation location, unable to cover all flange nodes, and are costly. Therefore, a technical solution capable of efficiently and comprehensively detecting flange sealing surfaces is urgently needed to solve this problem. Utility Model Content

[0003] The purpose of this application is to overcome the above-mentioned technical problems and provide a detection device for flange oil and gas leakage.

[0004] A flange oil and gas leak detection device includes a detection body with an air inlet hood on one side. The detection body has a cavity and a detection element. A handheld assembly is connected to the detection body, including a positioning rod with a bent rod hinged to it. The detection body is hinged to the end of the bent rod away from the positioning rod. By adopting this technical solution, the user can extend the detection body to the flange position by holding the positioning rod. The bent rod rotates around the hinge point, facilitating the extension of the detection body to the side of the flange away from the operator. The detection body can also rotate around the hinge point with the bent rod, allowing for small-amplitude angle adjustments, thus enabling the detection body to move circumferentially along the flange for more comprehensive detection of its outer perimeter. Preferably, an exhaust fan is installed inside the cavity of the detection body, and an air outlet is provided on the side wall of the detection body perpendicular to the air inlet hood. By adopting this technical solution, the exhaust fan operates during user operation, creating a negative pressure state inside the cavity, allowing air from around the flange to enter the cavity and fully contact the detection element, improving detection accuracy. Preferably, the air inlet hood is trumpet-shaped. By adopting the above technical solution, the trumpet-shaped air inlet hood increases the area of ​​the air inlet during use, ensuring that air around the flange can enter the detection body in a timely manner. Preferably, a filter screen is provided inside the air inlet hood. By adopting the above technical solution, the filter screen can filter the air entering the detection body during use, reducing impurities from entering the detection body. When the detection body moves to the lowest position of the flange, it prevents fallen objects from entering the detection body. Preferably, a laser emitter head is located at the center of the filter screen on the flange. By adopting the above technical solution, the laser emitter head can be easily calibrated by the operator during use, ensuring that the laser emitted by the laser emitter moves along the gap of the flange joint, ensuring that the exhaust hood is aligned with the flange gap, making the detection more accurate. Preferably, the bending rod is telescopic. By adopting the above technical solution, the bending rod is telescopic during use, thus adapting to flanges of different radii. Preferably, the bending rod includes a fixed rod and a sliding rod sleeved outside the fixed rod. The sliding rod is slidably connected to the fixed rod, and a bolt is threaded onto the sliding rod to fix the sliding rod and the fixed rod. By adopting the above technical solution, the user can loosen the bolt to slide the position of the sliding rod, thereby adjusting the length of the bending rod. The bolt fixation facilitates the securing of the sliding rod. Preferably, a handgrip is provided at the end of the positioning rod away from the frame, and the handgrip has anti-slip texture. By adopting the above technical solution, the anti-slip texture increases the friction between the operator's hand and the handgrip, facilitating better operation of the testing device. Attached Figure Description

[0005] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2This is a cross-sectional view of this application; Figure 3 It is an exploded view of the inspection body and the bent rod.

[0006] Reference numerals: 1. Detection body; 11. Cavity; 12. Detection element; 13. Air inlet hood; 14. Filter screen; 15. Laser emitter head; 16. Exhaust fan; 17. Air outlet; 2. Handheld assembly; 21. Positioning rod; 211. Handheld part; 22. Bending rod; 221. Fixing rod; 222. Sliding rod; 23. Self-locking motor; 231. Drive shaft. Detailed Implementation

[0007] The inventors of this application have discovered that flange connections are widely used in the petrochemical industry for detachable connections in pipeline systems, and their sealing performance is directly related to production safety. Statistics show that 60% of pipeline leaks originate from flange seal failure. Existing technologies use handheld detection devices for localized inspection or fixed gas detectors for point monitoring, but these methods are difficult to achieve full circumferential inspection of the flange sealing surface, easily overlooking potential leak points. Therefore, this application mainly adopts the following scheme, achieving a technical effect of efficient and comprehensive inspection of the flange sealing surface. The following is a further detailed description of this application. Example 1 This application provides a flange oil and gas leakage detection device, including a detection body 1. An air inlet hood 13 is provided on one side of the detection body 1. A cavity 11 is formed inside the detection body 1, and a detection element 12 is disposed within the cavity 11. A handheld assembly 2 is connected to the detection body 1. The handheld assembly 2 includes a positioning rod 21, and a bent rod 22 is hinged to the positioning rod 21. The bent rod 22 is telescopic, and the detection body 1 is hinged to the end of the bent rod 22 away from the positioning rod 21. The cooperation relationship between the above structures is as follows: the detection body 1 is hinged to the positioning rod 21 via the bent rod 22, allowing the detection body 1 to rotate around the hinge point, facilitating the adjustment of the angle of the detection body 1; simultaneously, the telescopic nature of the bent rod 22 allows the detection body 1 to extend a greater distance, adapting to flanges of different radii. With this structure, when using the device, the user can extend the detection body 1 to the flange position by holding the positioning rod 21, thereby achieving full circumferential detection of the flange sealing surface.

[0008] Specifically, the detection body 1 includes an outer shell and an internal cavity 11. A detection element 12 is disposed within the cavity 11. The detection element 12 can be an electrochemical sensor or an infrared sensor, used to detect the gas composition around the flange. The installation position of the detection element 12 can be adjusted according to actual needs to ensure that the detection range covers the entire sealing surface of the flange. For example, the detection element 12 can be installed in the center of the cavity 11 using a fixed bracket to ensure its detection sensitivity and accuracy.

[0009] As an important component of the detection body 1, the air inlet shroud 13's structural features determine the manner in which air enters the detection body 1. The air inlet shroud 13 is trumpet-shaped, which increases the area of ​​the air inlet, ensuring that air around the flange can enter the detection body 1 in a timely manner. The trumpet-shaped air inlet shroud 13 can also be fixed to one side of the detection body 1 by welding or threaded connection, facilitating installation and disassembly. Furthermore, a filter screen 14 is installed inside the air inlet shroud 13. The filter screen 14 can be made of stainless steel, which has high strength and durability. The function of the filter screen 14 is to filter impurities in the air entering the detection body 1, preventing dust and other particles from damaging the detection element 12.

[0010] A laser emitter 15 is positioned at the center of the air inlet shroud 13. The laser emitter 15 can be installed using an embedded design, meaning it is fixed within the central recess of the air inlet shroud 13. The laser emitter 15 operates at 5V and can be powered by a battery or an external power source. The laser emitted by the laser emitter 15 moves along the flange's mating seam, assisting operators in precise calibration and ensuring that the air inlet shroud 13 is aligned with the flange seam.

[0011] An exhaust fan 16 is added inside the cavity 11 of the detection body 1. The exhaust fan 16 is installed at the rear of the detection body 1 and is fixed to the side wall of the cavity 11 with bolts. When the exhaust fan 16 is working, it can create a negative pressure state inside the cavity 11, thereby drawing air from around the flange into the detection body 1. The motor of the exhaust fan 16 can be a small DC motor, which features low power consumption and high efficiency. At the same time, an air outlet 17 is opened on the side wall of the detection body 1 perpendicular to the air inlet shroud 13. The size of the air outlet 17 can be adjusted according to actual needs to ensure that the airflow inside the cavity 11 can be smoothly discharged.

[0012] The design of the handheld component 2 fully considers the ease of use for operators. The positioning rod 21 can be a solid steel pipe, possessing good rigidity and stability. A handheld part 211 is provided at the end of the positioning rod 21 furthest from the frame. The handheld part 211 has anti-slip textures, which can be made of rubber, increasing friction and providing a comfortable grip. The bending rod 22 includes a fixed rod 221 and a sliding rod 222 sleeved outside the fixed rod 221. The sliding rod 222 is slidably connected to the outside of the fixed rod 221. The sliding rod 222 has a threaded hole through which a bolt passes and contacts the fixed rod 221. Tightening the bolt fixes the sliding rod 222 to any position on the fixed rod 221, thereby adjusting the length of the bending rod 22 to allow the inspection body 1 to adapt to flanges of different radii. After adjustment, tightening the bolt fixes the position of the sliding rod 222, ensuring stability during the inspection process. The hinge structure between the inspection body 1 and the bending rod 22 is key to achieving full-circumferential inspection. The hinge point allows the detection body 1 to rotate around the bent rod 22, facilitating adjustment of the detection angle. The hinge point can employ a connection structure between a self-locking motor 23 and a drive shaft 231. The self-locking motor 23 is fixedly connected to the bent rod 22, and the drive shaft 231 is fixedly connected to the output shaft of the self-locking motor 23. The detection body 1 is rotatably connected to the drive shaft 231, thus achieving smooth rotation. Simultaneously, to prevent excessive rotation of the detection body 1 during detection, a limiting device, such as a limit pin or spring plate, can be installed at the hinge point to restrict the rotation range of the detection body 1.

[0013] The implementation principle of this embodiment is as follows: When using the device, the user first adjusts the length of the bending rod 22 according to the flange size, allowing the detection body 1 to smoothly reach the flange position. Then, by holding the positioning rod 21, the user extends the detection body 1 to one side of the flange, and by adjusting the angle of the hinge point, the detection body 1 can cover the entire sealing surface of the flange. The flared design of the air inlet shroud 13 and the protective function of the filter 14 ensure that the air around the flange can smoothly enter the detection body 1 and fully contact the detection element 12, improving the accuracy and reliability of the detection. The overall structure is simple and practical, easy to operate, and can effectively solve the problem of full-circumferential detection of the flange sealing surface, significantly improving detection efficiency and safety.

[0014] Under the action of the exhaust fan 16, a negative pressure environment is formed inside the cavity 11. The air around the flange enters the detection body 1 through the air inlet hood 13 and comes into full contact with the detection element 12. This active suction method can significantly improve the sensitivity and accuracy of detection, especially in the case of minor leaks at the flange sealing surface, enabling earlier detection of potential problems. In addition, the introduction of the exhaust fan 16 can also accelerate the gas renewal rate inside the cavity 11, preventing the detection element 12 from being exposed to a high concentration of gas for a long time.

[0015] The introduction of the laser emitter 15 provides operators with an intuitive positioning reference, making the inspection process more precise. By observing the position of the laser beam, operators can quickly adjust the angle and position of the inspection body 1 to ensure that the inspection area covers the entire sealing surface of the flange. This design not only improves inspection efficiency but also reduces human error, further enhancing the reliability of the inspection. The above are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A detection device for flange oil and gas leakage, characterized in that: The device includes a detection body (1), an air inlet hood (13) on one side of the detection body (1), a cavity (11) inside the detection body (1), a detection element (12) inside the detection body (1), and a handheld assembly (2) connected to the detection body (1). The handheld assembly (2) includes a positioning rod (21), a bent rod (22) is hinged to the positioning rod (21), and the detection body (1) is hinged to the end of the bent rod (22) away from the positioning rod (21).

2. The flange oil and gas leakage detection device according to claim 1, characterized in that: An exhaust fan (16) is installed inside the cavity (11) of the detection body (1), and an air outlet (17) is opened on the side wall of the detection body (1) perpendicular to the air inlet hood (13).

3. The flange oil and gas leak detection device of claim 1, wherein: The air intake shroud (13) is horn-shaped.

4. The flange oil and gas leakage detection device according to claim 1, characterized in that: A filter screen (14) is installed inside the air inlet hood (13).

5. The flange oil and gas leak detection apparatus of claim 4, wherein: A laser emitter (15) is provided at the center of the filter screen (14) of the flange.

6. The flange oil and gas leak detection apparatus of claim 1, wherein: The bending rod (22) is telescopic.

7. The flange oil and gas leak detection apparatus of claim 6, wherein: The bending rod (22) includes a fixed rod (221) and a sliding rod (222) sleeved outside the fixed rod (221). The sliding rod (222) is slidably connected to the outside of the fixed rod (221), and the sliding rod (222) is threaded with bolts that fix the sliding rod (222) and the fixed rod (221).

8. The flange oil and gas leak detection apparatus of claim 1, wherein: The positioning rod (21) has a hand-held part (211) at the end away from the frame, and the hand-held part (211) has anti-slip texture.

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