The invention discloses a sampling device of
smoke and dust with automatically positioning detecting point, comprising a sampling mouth, a fixing unit, a Teflon axle sleeve, a sampling
pipe of
smoke and dust, a connecting piece of the sampling
pipe, a stepping motor, a main engine of the sampling device of
smoke and dust, a screw rod, and a rigid bearing unit, wherein, the fixing unit is connected with a sampling hole through a
flange, the Teflon axle sleeve comprising two half circle cylinders are embedded in the center of the fixing unit, the sampling
pipe of smoke and dust is slidingly arranged in the Teflon axle sleeve, one end of the sampling pipe of smoke and dust is provided with the sampling mouth, the connecting piece of the sampling pipe is fixed on the other end of the samplingpipe of smoke and dust, one end of the screw rod is arranged in a screw rod
retainer, the other end of the screw rod is connected with the stepping motor through the rigid bearing unit arranged on the fixing unit, and the stepping motor is connected with the main engine of the sampling device of smoke and dust through
signal lines and power lines. According to the invention, the whole process of sampling smoke and dust is accomplished automatically, so that the damage probability of operating personnel in operation process is reduced. The sampling mouth does not shake or incline when being used for positioning, the positioning is accurate and rapid, and the installation and dismounting of the sampling pipe are convenient.