Toxic gas detector for petrochemical plants

The utility model discloses a toxic gas detector for a petrochemical plant area. The device structurally comprises a shell, a display screen, a switch button, an external power line, a gas inlet pipe,a gas outlet pipe, a powerful sucker and a toxic gas detection module, the powerful suction cup is arranged at the bottom of the shell of the toxic gas detector; when the toxic gas detector needs tobe fixed, the detector can be fixed; firstly, the powerful suction cup is attached to a position needing to be fixed; fixing shell by pressing, rotating the housing, the sucker body is pushed to pressdownwards through the rotation of the screw rod; gas in the sucker body is exhausted; different air pressures are formed inside and outside the sucker body; due to the fact that the sucker body is pushed through rotation of the screw rod, the sucker body is forcibly pressed down through rotation, the outer side of the sucker body is supported through the fixing shell, the sucker body can be effectively prevented from shrin