Petroleum detection device for multi-range sealed sampling

The invention discloses a petroleum detection device for multi-range sealed sampling, and relates to the field of petroleum detection, the petroleum detection device is characterized in that the lower end of a base body is provided with a nesting butt joint piece in a nesting manner, the lower end of the nesting butt joint piece is in butt joint with an external butt joint piece, and the inner sides of the base body, the nesting butt joint piece and the external butt joint piece are provided with built-in butt joint hoses in a penetrating manner. According to the petroleum detection device for multi-range sealed sampling, after equipment goes deep into sampling liquid, sampling treatment in different ranges is conducted in a self-adaptive mode, a user only needs to stir torsion springs at the corresponding positions with fingers to be in butt joint with movable blocks, and the movable blocks are in butt joint through the rotating state; a first traction rope is matched to drive a spherical nested butt joint p