Patent ID: 11931797
Assignee: ZHEJIANG HAILIANG CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  F | IPC B

Claim 4:
5. The double-acting switch valve according to claim 3, wherein
the carbon rod comprises a carbon rod body and a large-diameter segment at an upper end of the carbon rod body;
the discharge port comprises a first discharge port and a second discharge port, a size of the first discharge port being smaller than a size of the large-diameter segment, a size of the second discharge port being greater than a size of the large-diameter segment; when the carbon rod falls off via the first discharge port, the large-diameter segment abuts against the housing around the first discharge port;
a through groove mutually communicating with the first discharge port and the second discharge port is disposed therebetween; and
the carbon rod clamping device is operable to bring the clamped carbon rod to the second discharge port so as to be detached from the housing.