| 摘要 |
A detachable type power distributor of an underground cable is provided to extinguish a fire in a duct through a penetration hole by moving an upper post to a side by a first spring and exposing the penetration hole of a lower post. A power distribution terminal box for an underground includes a post(10), a power transmission/distribution unit(20), and a case(30). A penetration hole connected to a duct is formed on a central part of the post. A rail is formed on an upper plane of the lower post. A roller which is put on the rail is installed on a lower part of the upper post. The power transmission/distribution unit and the case are installed on an upper plane of the upper post. A first spring is arranged between the lower post and the upper post, and compresses the upper post to open the penetration hole. An anchor bolt is coupled between the lower post and the upper post, and fixes the upper post to close the penetration hole. A bracket(40) is installed inside the duct. A connector(50) is liftably installed on the bracket. An underground cable is connected to a lower end of the connector which is downwardly compressed by a spring. A connection terminal(60) is installed to penetrate the upper post. The connector is coupled to a lower end of the connection terminal. A connection socket connected detachably to the connection body is installed on an upper end of the connection terminal. A solenoid(70) is installed on the upper post, and is coupled to the connector. The solenoid fixes the connector not to be released from the connection terminal. A fixed releasing unit releases the fixed upper post and lower post by cutting a middle part of the anchor bolt. A control unit is coupled to the solenoid, the driving motor of the post fixing unit, and the air compressor of the air cylinder device. A fire detection sensor(100) coupled to the control unit is installed inside the duct and detects a fire inside the duct. |
