Embedded pole for circuit breaker

The utility model discloses a solid-sealed polar pole for a circuit breaker. INSULATING HOUSING, wherein the vacuum arc-extinguishing chamber and the conductive piece cavity are arranged in the insulating shell; the vacuum arc-extinguishing chamber is positioned above the conductive part cavity; the upper end of the insulating shell is provided with an upper wire outlet seat corresponding to the upper end of the vacuum arc-extinguishing chamber; a lower wire outlet seat corresponding to the lower end of the vacuum arc-extinguishing chamber is arranged on the side wall of the insulating shell;a first heat dissipation channel communicated with the conductive part cavity is formed in the lower wire outlet seat; a second heat dissipation channel communicated with the first heat dissipation channel is formed in the insulating shell; an air outlet is formed in the upper end of the second heat dissipation channel; the insulating shell is provided with a vent hole communicated with the secondheat dissipation channel.