Vacuum smelting furnace sampling device

A sampling device of a vacuum melting furnace comprises a sampler assembly and a support assembly. The sampler assembly comprises a sampling pipe, a gas inlet pipe, a connecting rod and a connecting sleeve; the sampling pipe is provided with a sampling cavity and a sample inlet/outlet; the gas inlet pipe is provided with a gas inlet channel; the sampling pipe is fixedly arranged at the lower end of the air inlet pipe, and the connecting rod is arranged at the upper end of the air inlet pipe and fixedly connected with the air inlet pipe through the connecting sleeve; a rack sleeve is movably arranged on the bracket combination and is driven by a gear to move up and down; the sampler combination is arranged at the lower part of the rack sleeve of the bracket combination through threads; thegear drives the rack sleeve to move up and down, and the sampler combination is driven by the rack sleeve to move up and down; when the sampler assembly moves to the lower end, the sampling pipe is immersed into a copper allo