| 摘要 |
PURPOSE: A structure to connect a drainpipe in which expansion joint is controlled according to a condition of a construction site is provided to improve the efficiency to prevent water leak by fastening a water leak blocking ring in both sides of a connecting unit. CONSTITUTION: A structure to connect a drainpipe in which expansion joint is controlled according to a condition of a construction site comprises ring shaped grooves (111a,121a), water leak blocking rings (21,22), a connecting socket (31), and a cylindrical packing (40). The ring shaped groove is formed to have constant width (W1) on outer circumferential surface of a connecting unit in a drainpipe (12) of the other side and outer circumferential surface of a connecting unit in a drainpipe (11) of one side. The water leak blocking ring is formed to have a gap to move in the specific distance to the shaft direction. The water leak blocking ring has smaller width (W2) than the width of the ring shaped groove. The connecting socket is connected to a semicircular structure. The connecting socket is adhered to the outer circumferential surface of the water leak blocking ring. The cylindrical packing has the diameter such as internal diameter of a pair of connecting sockets in a connecting section of one side drainpipe and the other side drainpipe.
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