Replaceable graphite thimble for assembled anode voltage drop automatic measuring equipment for aluminum electrolysis

The invention discloses a replaceable graphite ejector pin for assembled anode voltage drop automatic measuring equipment for aluminum electrolysis, which comprises a graphite ejector pin head, the graphite ejector pin head is movably arranged in a copper sleeve, the head end of the graphite ejector pin head extends out of the copper sleeve, the head end of a main ejector pin head extends into the copper sleeve and is fixedly connected with the copper sleeve, and the surface of the tail part of the graphite ejector pin head is attached to the surface of the head part of a main ejector pin. And the main ejector pin penetrates through the main sleeve and is fixedly connected with the main sleeve. The main sleeve is fixed, so that shaking of the main ejector pin as well as the copper sleeve and the graphite ejector pin head which are connected with the main ejector pin can be avoided; the main ejector pin is tightly attached to the tail part of the graphite ejector pin head after being screwed into the sleeve, s