Patent ID: 11911941
Assignee: THE JAPAN STEEL WORKS, LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A shut-off nozzle comprising:
an injection nozzle in which a flow path is formed;
a needle valve provided in the flow path coaxially with the injection nozzle, the needle valve being movable forward and backward in an axial direction; and
a guide ring provided in the flow path,, wherein the needle valve comprises a columnar shaft portion, and the guide ring is configured to guide the forward and backward movement of the needle valve at the shaft portion, and
wherein the guide ring is fixed to the shaft portion of the needle valve and is configured to move forward and backward integrally with the needle valve when the needle valve moves forward and backward, with an outer peripheral portion of the guide ring sliding with respect to a bore of the flow path.