Pipeline formula medium suspends alarm device

The utility model provides a pipeline formula medium suspends alarm device, including inner tube and outer tube, the outer tube is coaxial cup joint including the outside of tubes, the inlet department of inner tube is equipped with mobilizable piston, and installs the tongue tube that is used for responding to piston position on piston relative position's the outer tube pipe wall, advances the direction along feed liquid stream, the tail end of inner tube is equipped with at least two in proper order, and the outside fixed mounting of piston has the annular that is used for limiting piston displacement to separate the frame around the xia quan hole of inner tube pipe wall round and last ring hole, and the feed liquid is carried and is broken off, and the piston lies in the inlet department of inner tube, sends alarm signal when the piston is sensed to the tongue tube. The utility model discloses simple structure, reasonable in design sends alarm signal through the position of tongue tube electromagnetic indu