Abrégé

A copper water pipe elbow having solder, comprising an elbow section (1) and straight pipe sections (2) disposed on both ends of the elbow section (1). Each straight pipe section (2) is provided with an annular solder groove in the circumferential direction, and the solder groove is filled with solder (3) and used for soldering to an external copper water pipe (5). A thin film (4) used for sealing the solder (3) in the solder groove is connected to the opening of each solder groove. The thin film (4) is formed by melting the solder (3), injecting the molten solder into a flat mold to form a thin sheet, and then extending the thin sheet. Also disclosed are a corresponding manufacturing method and soldering method. By using the described technical solution, the external copper water pipe and the copper water pipe elbow can be soldered after being connected together by insertion, and there is no need to perform solder filling on site, no need to remove the sealingly soldered thin film on site, no need to worry about solder falling off due to thin film removal, and no need to worry about the decrease in soldering quality due to impurities formed by the thin film. Therefore, soldering efficiency is greatly increased, and soldering quality is improved.

Classes IPC  ?

• F16L 43/00 - CoudesSiphons
• F16L 13/02 - Raccords soudés à l'autogène sans apport de métal
• B23K 1/00 - Brasage ou débrasage

Abrégé

A production method for a heavy coil cupronickel alloy coil pipe comprises the following steps: (1) smelting cupronickel alloy material, and producing a cupronickel alloy hollow casting blank by a horizontal continuous casting process with composite electromagnetic stirring technology; (2) rolling the cupronickel alloy hollow casting blank which has been milled the surface thereof, and drawing the rolled pipe with a two successive drawing device to produce a cupronickel successive drawn coil pipe; (3) washing the inner wall and the outer wall of the cupronickel successive drawn coil pipe, and continuously annealing the anneal successive drawn coil pipe with a passing through type induction annealing device; (4) drawing the annealed cupronickel successive drawn coil pipe to produce a cupronickel coil drawn pipe; (5) conducting eddy current testing on the cupronickel coil drawn pipe, and simultaneously winding the cupronickel coil drawn pipe horizontally to form the heavy coil cupronickel alloy coil pipe; and (6) annealing the heavy coil cupronickel alloy coil pipe needing to be annealed. The heavy coil cupronickel alloy coil pipe with single coil weight being more than 300 kg can be produced with the method, and the yield is high.

Classes IPC  ?

• B21C 37/06 - Fabrication de tôles, barres, fils, tubes ou profilés métalliques ou de produits semi-finis similaires, non prévue ailleursFabrication de tubes de forme particulière des tubes ou tuyaux métalliquesProcédés combinés pour fabriquer des tubes, p. ex. pour fabriquer des tubes à parois multiples
• B22D 11/045 - Coulée continue des métaux, c.-à-d. en longueur indéfinie dans des moules sans fond pour la coulée horizontale