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New methods for detecting leaks in pipeline valves

2020-10-29View Original

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The LEAKSHOOTER acoustic imaging system enables rapid detection of leaks in any type of gas, including compressed air, steam, hazardous gases, vacuum, and natural gas. The perfect combination of infrared and ultrasonic technologies provides a wide range of detection capabilities. It can be used for detecting compressed gas leaks, infrared thermal imaging, inspection of steam traps, verification of sealing integrity, detection of vacuum or negative pressure leaks, detection of electrical partial discharges, identification of internal leaks in valves and pipelines, as well as detection of bearing wear through auditory analysis. When the LE4800plus industrial acoustic imaging device detects a leak during its mobile scanning, it displays the location of the leak as a highlighted area on the large color LCD screen. The source of leakage on the LCD screen is visible in real time as yellow (indicating low leakage and a weak signal) or red (indicating high leakage and a strong signal). At the same time, the horizontal light bars on the side of the LCD screen display different colors and specific leakage amounts, and the instrument can automatically calculate the amount of money wasted due to the leakage point. Features of the LE4800plus industrial acoustic imager: l Intuitive—visualization allows for the easy capture of images of any gas leaks from a distance of 30 meters within 0.01 seconds. l Convenience——Easy to use; can be operated with just one hand. Icon-based operation eliminates language barriers, and data transmission can be initiated with a single click. l Data-driven—Values such as the \"annual money lost\" due to leaks and the \"annual leakage volume\" are displayed directly on the instrument’s screen, making it possible to see the cost savings and improving work efficiency ; Automatically generate reports and upload them to a PC, making reporting more meaningful. Technology-driven approach – combining sound wave detection with visualization technology allows you to see the leakage points clearly while also hearing the sound of the leaks. The wireless Bluetooth feature frees you from the constraints of wired headphones. Versatility – In addition to detecting compressed air leaks, the LEAKSHOOTER industrial acoustic imaging instrument can also be used to identify leaks in vacuum systems and steam traps, as well as local discharges, internal valve leaks, bearing issues, seal integrity, and more. For specific applications: Compressed air leak detection (it can detect leaks under both positive and negative vacuum conditions, and it shows the exact amount of leakage). Compared to traditional methods such as using soapy water for leak detection or conventional leak imaging cameras, the LE4800plus-Chinese version demonstrates the advantages of modern precision measurement instruments. The LE4800plus-Chinese version is a visual inspection system that not only automatically displays the location of leaks but also shows different colors and values indicating the severity of the leaks. The system can automatically take photos of the leak sites, store them on a PC for analysis, and utilizes visual leak imaging cameras to enable effective leak detection and prompt corrective actions. This helps companies save between 150,000 and 1.5 million yuan in compressor operation costs each year, resulting in a very significant return on investment. The LE4800plus-anti-interference version can detect any gas leaks from a distance of 30 meters, thanks to its visual ultrasonic imaging technology, and is not affected by environmental interference. The French company Lacshot’s infrared thermal imaging detection modules are equipped with infrared temperature imaging functions. Infrared thermal imaging can be used in applications such as the maintenance of mechanical and electrical equipment, transformers, switch stations/nodes, cable insulation, pipeline insulation, detection of leaks, as well as in metallurgical furnaces and chemical reaction towers. Studies on leaks in pressure vessels, pipelines, and valves show that approximately 20% of valves in industrial installations have leakage problems; these leaks account for about 50% of the total economic losses incurred. Additionally, valve leaks can cause serious environmental pollution as well ; A visual leak detector can detect valve leaks from a distance, preventing production accidents. Valve leakage is divided into two types: external leakage and internal leakage. External leakage of pipeline valves (Figure 1); internal leakage of valves (Figure 2). 1. Place the instrument against the pipeline upstream of the valve (as shown at point A) to measure the ultrasonic values in the system environment. 2. Use the Lex Shut button to adjust the instrument’s sensitivity in order to measure the system’s background signal, while paying attention to the dB reading on the display screen. 3. Place the instrument against the pipeline downstream of the valve (as shown at point B) to listen for leakage signals. If the dB reading on the display is less than or equal to the reading at point A, it indicates that there is no leakage in the valve ; If the dB reading at point B increases compared to point A, it indicates a valve leak. 4. Finally, attach the detector to a point downstream of point B on the pipeline in order to identify the leak location. If the valve leaks, the dB reading at point C in the diagram should be lower than the reading at point B ; If the dB reading at point C is higher than that at point B, the leak location must be somewhere downstream in the pipeline. file:///C:\Users\MI\AppData\Local\Temp\ksohtml10400\wps12.png Detection of partial discharges in electrical systems (infrared imaging and visualized acoustic waves offer advantages).▍Fault detection in GIS switch drive cabinets to prevent failures and accidental operations of switches.▍Detection of insulator pollution-induced flashovers and internal cracks, as well as partial discharges at cable connections.▍Detection of partial discharges inside GIS/GCB units, switchgear, power supply cabinets, and communication cabinets.▍Detection of partial discharges in transformers, bus bushings, CT/PT devices, and capacitors.▍Detection of SF6 gas leaks; diagnosis of faults in steam traps. Steam is an expensive form of energy. There are currently about 3 million steam traps in use in our country, and nearly 70% of them are not operating properly. Some fail to close, resulting in steam leaks, while others experience water accumulation due to clogged steam traps that cannot open. The sonar steam trap detector we provide offers various inspection methods that are simple and easy to use! LEAKSHOOTER can easily determine whether a steam trap is leaking or blocked using sonar and internal curves. The instrument is equipped with a non-contact infrared temperature sensor built into it; together with temperature measurements of the pipes upstream and downstream of the trap, this allows for an accurate determination of any faults in the trap. Sealability/airtightness testing is primarily used for sealing inspection of automobiles, trains, airplanes, ships, and containers. The Ultratone sealing test is a non-destructive, offline testing method that does not require pressure application; as a result, it is faster, simpler, and more accurate than traditional methods that use pressure or foam. In this testing method, without applying pressure to the device under test, an ultrasonic signal generator is placed inside the device or at one of its ends; the ultrasonic signals then fill every corner of the device being tested and penetrate through any leakage points. Therefore, by using a LEAKSHOOTER detector to scan for the escaping sound waves from the outside, it is possible to identify the exact location of the leak. The sealing condition can be determined by comparing the magnitude of the displayed values with the magnitude of the indication of image defects. Mechanical stethoscopy and bearing inspection: The French-made Lecksort visual industrial ultrasonic imager also features a stethoscopy mode that allows identification of the locations where any machine is producing abnormal noises. Whether it’s abnormal noises from bearings, faults in gearboxes, loose pistons, various types of vibrations from gears and pumps, or the sounds produced by the solenoids of relays, all can be detected clearly. It can also detect the flow and blockage conditions of liquids in pipelines, as well as the operating status of various motors, internal combustion engines, diesel engines, engines, household appliances, etc., and the operation status of automated water flow systems in industrial and mining enterprises. LEAKSHOOTER also offers on-site inspection services to its customers. On-site leak detection covers a wide range of services: after-sales support for leak detection instruments, rental of leak detection equipment, provision of leak detection services in factories, and leak detection assessments. Leak detection instruments can be used to identify leaks in pipelines carrying air, gas, steam, water, as well as liquids, and in various types of equipment. Illustrations of LEAKSHOOTER’s applications in various industries. Configuration: Standard configuration includes a Chinese-language version of the leak detection camera unit, a 5-in-1 battery charger, a data transmission module, a portable instrument case, a certificate of conformity, factory certification, instructions in Chinese, an instrument protective cover, a strap to prevent the instrument from slipping from hands, and a sensor calibrator (used for calibrating sensors). Optional accessories: steam trap detection module, internal leakage detection module, extended version of external flexible sensor (3000 MM long for detecting minor leaks at great heights), external sensor (1500 mm long), infrared thermal imaging module, external probe (for diagnosing faults), 13-direction transmitter (for checking airtightness), Bluetooth headphones, Bluetooth player, mobile power supply component. Instrument parameters: Image memory – capable of storing 6,000 photos of on-site fault locations; these photos can be uploaded to a PC for analysis, with fault location indicators displayed and names allowing for free editing. Host: The imaging unit’s host is equipped with a Chinese and English operating system; it runs on an operating system version 1.4 or higher and features functions such as acoustic and visual imaging, infrared thermal imaging, device auscultation, Bluetooth transmission, built-in lighting, and flow monitoring. Sensitivity: It can detect leaks as small as 0.001 mm at a distance of 100 feet (about 30 meters) and under a pressure of 1 bar. Leakage volume: The measurement is displayed in RMB; it shows the specific leakage volume per hour, as well as the amount of money wasted, which is displayed automatically on the imaging unit’s host. Sensor parameters: The sensor’s gain can be adjusted between 40 and 106 dB ; Bandwidth ±1kHz to -2 dB ; Center frequency: 40 kHz ± 0.05 kHz ; Mixer: Adjustable frequency from 30 to 50 kHz ; Modes of fault indication: Sound + numerical values + color bar + automatic camera recording of leak points (four methods for detecting leaks). Power supply: Nickel-metal hydride batteries provide a operation time of 10 hours; there is also a battery pack that allows for fast charging in 2 hours. Units of measurement displayed: Curves, Celsius, dB, RMS, MAX, m3/h, ft3/h. Operating temperature range: -30°C to +85°C. Camera with photo function: 7 million pixels, equipped with an internal LED lighting system that enables photography in dark environments. Infrared thermal camera: 3 million pixels, capable of displaying color changes corresponding to different temperatures. Color LCD display: 5.8 inches, screen resolution of 640 x 480. Connection method: USB interface. Stethoscope module: Can be connected to the main unit via Bluetooth wireless headphones or Bluetooth speakers; the volume can be adjusted from 0 to 10. Accuracy: +/-0.3dBuV. Dimensions: 310x165x65 mm. Weight: The instrument weighs 700 g; the waterproof packaging adds another 6 kg. Warranty period: 1 year for the camera unit, 3 years for the core sensors. Complies with European certification standards: Ø CEM 2004/108, Ø CE: EN61000-6-4, Ø EN61000-6-2

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