| 摘要 |
A swivel joint for the interconnection between pipes on an upper structure side and a lower structure side of a construction equipment of the upper structure revolving type. The swivel joint has formed therein a fluid passage for fuel supply oil to be supplied from a fuel oil tank on the lower structure side to an engine on the upper structure side and another fluid passage for return oil to be returned from the engine to the tank. The fluid passages are formed in an isolated condition from any other fluid passage so that fuel supply oil or return oil may not be mixed with any other fluid within the swivel joint or may not leak to the outer side of the swivel joint. Another swivel joint is also disclosed wherein a body is divided in an axial direction into two parts. One of the body parts is formed from a non-ferrous metal material having an anticorrosion property so that the body may not suffer from corrosion by fuel oil or air which contains water therein, and passages and annular grooves for fuel oil and air are formed in the anticorrosion body part.
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