Ray transceiving system of underwater flowmeter and deduction metering method

A ray transceiving system of an underwater flowmeter,

• comprising a flowmeter body, wherein a fluid metering channel extends through the flowmeter body, a transmitting window and a probing window positioned on both sides of the fluid metering channel are arranged on the flowmeter body, an inner end of the transmitting window and an inner end of the probing window are arranged opposite to each other and are respectively in communication with the fluid metering channel, a ray transmitting module is arranged in the transmitting window, a ray probing module is arranged in the probing window, the ray transmitting module transmits rays to pass through the fluid metering channel, and the ray probing module probes and receives the rays passing through the fluid metering channel;
• the ray transmitting module comprises a radioactive source assembly, a collimator, and a first isolation seat arranged in sequence, wherein the first isolation seat is located at the inner end of the transmitting window, the first isolation seat separates and seals the fluid metering channel and the transmitting window, and an inner end face of the first isolation seat is flush with and adapted to an inner wall of the fluid metering channel;
• and
• the ray probing module comprises a probe component, a pressing ring, and a second isolation seat arranged in sequence, wherein the second isolation seat is located at the inner end of the probing window, the second isolation seat separates and seals the fluid metering channel and the probing window, and an inner end face of the second isolation seat is flush with and adapted to the inner wall of the fluid metering channel;
• wherein
• a first beryllium pad is arranged between the collimator and the first isolation seat, and the first isolation seat is made of titanium alloy;
• and
• a second beryllium pad is arranged between the pressing ring and the second isolation seat, and the second isolation seat is made of titanium alloy.