FIELD: measurement.
SUBSTANCE: use for inspection of low-pressure pipelines. Essence of the invention consists in the fact that in the inside-tube diagnostic tool with adjustable speed for the inspection of low-pressure pipelines is made in the form of hingedly connected to each other three separate sections – accumulator, section of measuring instruments and section of movement speed control, containing housing-base with support centring elements and a speed control system in the form of a central channel in the form of a Laval nozzle with a valve, which is located in the base housing, and including an emergency braking system, wherein said valve is shaped to streamlined drop-like body to adjust channel opening degree by displacing it along central channel axis.
EFFECT: providing the possibility of developing an easy-to-implement inspection tool with a device for linear speed control, which provides for collection of diagnostic information uniformly along the length of a gas line of low (up to 10 atm) pressure.
1 cl, 3 dwg
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