| 摘要 |
<p>PURPOSE:To simplify operation, and to improve work environment by inclining and changing a guiding body in the correct direction by a device, in which a push ring is installed into the guiding body of a buried pipe and an expansion member composed of a shape memory alloy is mounted into the push ring. CONSTITUTION:An annular push ring 2 is set up so as to be inscribed with the shell of a guiding body 1 fitted at the front end of a buried pipe 6, and expansion members 3-1 are installed at four positions at every two set so as to be oppositely faced up and down and left and right in the push ring 2. Electric heating bodies 7 are mounted to each expansion member 3-1, and connected up to the starting shaft side by connecting wires 10, and both ends of the expansion members 3-1 are coupled by clamps 6 on the push ring 2 side and the fixtures 9 of a succeeding pipe 4, thus prevent1,ng movement at a movable time. When the guiding body 1 is slipped off upward, electricity is conducted through a pair of the lower expansion members 3-1 through the connecting wires 10. The expansion members 3-1 are heated and erected by the electric heating bodies 7, a lower push ring 2 is pushed out and the guiding body 1 is deflected downward, and the attitude of the guiding body 1 is returned together with propulsion.</p> |
