| 摘要 |
<p>PURPOSE:To execute a dew condensation preventive work easily by providing a fire-preventive work tube main body in which a fireproof rock wool plastic member is inserted and fixed in an iron pipe remaining a hollow tube part, and an L-shape circular soft piece body of a soft material in which the L-shape bendings of coolant tubes and warmth keeping tubes are inserted through cuttings. CONSTITUTION:In an iron pipe 1 of a specific size, a fireproof rock wool plastic material 3 shorter than the iron pipe 1, in which small round holes 2 and 2' responding to the penetrating coolant pipes R and R' of an air-conditioning device penetrate, is fitted and fixed providing a hollow tube part 4 at one pipe entrance of the iron pipe 1 to form a fire-preventive work pipe main body (a). To the hollow tube part 4, an L-shape circular soft piece body (b) is fitted. In the circular soft piece body (b), cuttings are formed to open and close in forked directions, and the L-shape bendings of the coolant tubes R and R', and warmth keeping tubes 8 and 8' are fitted through the cuttings. As a result, a secure, safe, simple, and rapid work can be executed in a narrow space.</p> |
