Sample seat positioning device with sucking disc for purging and supplementing instrument

The invention discloses a sample seat positioning device with a sucking disc for a purging and supplementing instrument. The device comprises an upper stainless steel shell, an annular edge opening rubber pad, a lower drawer positioning box and an electric sucking pump; a limiting hole is formed in the upper surface of the upper stainless steel shell; a groove is formed in the side surface of theupper stainless steel shell; the annular edge opening rubber pad is arranged around the inner side of the upper edge opening of the limiting hole in the upper surface of the upper stainless steel shell; a lower drawer positioning box is installed in the groove in the side face of the upper stainless steel shell, the sucking disc is arranged at the bottom of the lower drawer positioning box, an airvent with a switch valve is formed in the front side face of the sucking disc, an air suction hole is formed in the rear side face of the sucking disc, and the outer side of the air suction hole is connected with an air sucti