| 摘要 |
<p>PURPOSE:To improve the connection workability of pipes and stabilize the flow of a heat medium in the pipe by connecting a large-diameter pipe provided with a lower hole for inserting a small-diameter pipe and the small-diameter pipe formed with a hem to be brought into contact with the large-diameter pipe on the periphery near the tip. CONSTITUTION:In a large-diameter pipe 2 provided with a lower hole 2a for inserting a small-diameter pipe 1 and the small-diameter pipe 1 formed with a hem 1a to be brought into contact with the outer face of the large-diameter pipe 2 on the periphery near the tip and provided with curvature machining at the tip section protruded in the large-diameter pipe 2, the tip section of the small-diameter 1 is inserted into the lower hole 2a of the large-diameter 2, and they are connected while the hem 1a is kept in contact. The connection workability of pipes is improved, and the flow of a heat medium in the pipe is stabilized. The airtightness and strength at the connected portion of pipes are stabilized, and quality can be secured.</p> |
