IN-SITU ULTRASONIC MEASUREMENT SYSTEM FOR SEEPAGE FLOW OF SEAFLOOR COLD SPRING NATURAL GAS

摘要

An in-situ ultrasonic measurement system for seepage flow of seafloor cold spring natural gas. The system comprises a seepage tent cover (2) and a flow measurement channel (1). The flow measurement channel (1) comprises a lower bubble breaking channel (11), an ultrasonic sensor measurement channel (12) and an upper bubble breaking channel (13) that are arranged from bottom to top in sequence and are communicated with each other. The lower bubble breaking channel (11) is communicated with the seepage tent cover (2) provided with bubble breaking grids (3). A lower bubble breaking device (4) and an upper bubble breaking device (5) that are arranged in the bubble rising direction are respectively mounted in the lower bubble breaking channel (11) and the upper bubble breaking channel (13). One side of the ultrasonic sensor measurement channel (12) is fixedly connected to an acoustic wave branching unit (7), and the other side is fixedly connected to a flat receiving transducer (8) used for receiving transmitting acoustic waves generated by the acoustic wave branching unit (7). An acoustic wave probe (9) also used for receiving the transmitting acoustic waves generated by the acoustic wave branching unit (7) is arranged in the ultrasonic sensor measurement channel (12). The ultrasonic measurement system can be used for performing long-term on-line measurement on in-situ seepage flow of seafloor cold spring natural gas in the environments of different water depths.