Application of Ultrasonic Flow Meter in Pipeline Leakage

Abstract: The application information of ultrasonic flow meter in pipeline leakage is provided by excellent flow meter and flow meter manufacturers. Application of ultrasonic flowmeter in pipeline leakage Pipeline transportation is widely used in the transportation of oil, natural gas and other liquids, gases and slurries due to its unique advantages of economy, portability and safety. Water transport. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the application of ultrasonic flowmeters in pipeline leakage. Application of ultrasonic flowmeter in pipeline leakage Pipeline transportation is widely used in the transportation of oil, natural gas and other liquids, gases and slurries due to its unique advantages of economy, portability and safety. It is one of the top five transportation industries in parallel with water transportation. However, with the growth of pipelines and the inevitable natural or man-made reasons such as corrosion and wear, pipeline accidents frequently occur. The leakage of the pipeline not only affects normal production, causing energy waste and economic loss, but also due to the danger and pollution of the transported medium, once an accident occurs, it will also cause environmental pollution and huge loss of life and property. An important pipeline fault monitoring technology. In order to reduce losses, it is necessary to detect leaks as soon as they occur, and to be able to pinpoint the location of the leak. Some existing pipeline leakage monitoring methods or instruments can not meet the requirements of accurate monitoring of oil pipelines. Therefore, this paper combines the actual situation of pipeline transportation in my country, and studies the leakage monitoring technology and operation monitoring system of crude oil pipelines. An ultrasonic flowmeter oil pipeline leakage monitoring method is proposed, which improves the positioning accuracy and reduces the monitoring cost. The system adopts the master-slave design of front-end and back-end machine structure, and has the functions of high-speed data acquisition, data communication, database archiving and analysis, etc. The measurement process is automatically controlled by the computer, and the measurement results are printed and equipped with a standard communication interface, which can be directly connected to the upper-level control system, which is convenient for information processing. The chaos theory is applied to information processing, and the advantages of computer network are fully utilized to establish a pipeline leakage monitoring system, so as to achieve the purpose of timely detection of leakage and accurate positioning. 2 Requirements for pipeline leakage monitoring system The purpose of leakage monitoring is to reduce the loss of leaked materials and to prevent further harm to people's lives, property and the environment caused by the leakage as much as possible. For this reason, an ideal monitoring system should meet the following requirements. After the leakage occurs, the leakage can be accurately detected and reported, and false alarms will not be issued due to factors such as operation errors and equipment failures. A leak detection system with ideal sensitivity should be able to detect leaks in the full range from leaks to pipeline ruptures, and issue correct alarms. The ideal real-time leak detection system can monitor the leak in real time after the leak occurs. So that operators can take immediate action to reduce losses. Long-distance pipelines with high positioning accuracy and long distances, the leak detection system needs to be able to provide the operator with the exact location of the leak point, so that the maintenance personnel can reach the oil leak point as soon as possible and carry out the repairing operation. Ease of maintenance The leak detection system is easy to maintain and adjust. 3. The circuit diagram of the pipeline leakage monitor system. The pipeline running state monitor uses a digital processing chip as the CPU, including a signal conversion circuit, an A/D acquisition circuit, a data display circuit, a real-time clock circuit, a long-distance communication circuit, and a communication circuit with the main computer. Interface circuit, sound and light alarm circuit and power circuit, etc. Figure 1 is the circuit block diagram of the monitor. In order to eliminate the interference introduced by the long-distance transmission of the signal output by the sensor, the signal conversion circuit first filters and amplifies the signal. In order to eliminate the unstable factors brought by the common ground of the system to the system operation, the high-performance isolation amplifier AD202 is used in the system to isolate the measured signal from the monitor. AD202 uses a signal coupling transformer to make the amplifier input and output have no circuit, and can complete the amplification function. AD202 has low power consumption and high precision (maximum nonlinearity±0.025%). The signal collector group collects the signal of the ultrasonic flowmeter and transmits it to the pipeline condition monitor through the signal transmission cable. The pipeline condition monitor takes the PC as the core, monitors the running status of the pipeline in real time, uses the flow time difference method to pre-alarm the pipeline leakage, controls the remote data communication link to obtain the data of the monitor at the other end of the pipeline, and sends it to the system computer station. The long-distance data communication link carries on the data transmission through the communication network cable. The main station regularly asks all sub-stations, collects various state parameters related to the speed of sound from each sub-station, and after collecting all sub-station data, the main station consults its internal topology program for describing the pipeline configuration, and then calculates the last The standard volume in and out of the measuring pipe section in minutes, if the imbalance exceeds the preset alarm setting value, a leak alarm will be issued

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