Separation preventive pipe joint and pipeline constituent member

Patent metadata

Field	Value
Publication number	US-2016334035-A1
Application number	US-201415111307-A
Country	US
Kind code	A1
Filing date	Dec 2, 2014
Priority date	Jan 27, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

A separation preventive pipe joint that can obtain an improved separation preventing function, can be assembled with reduced time and work on site, and has an adjustable angle of deflection. A lock ring storage groove accommodates a metallic lock ring that can be engaged with a spigot protrusion and a cushioning material that comes into contact with a bottom of the lock ring storage groove and a side wall on a socket opening side. The cushioning material is made of a material softer than the lock ring. With this configuration, even if a drawing force generated by a water pressure is applied to a pipe, separation between a socket and a spigot can be reliably prevented, achieving a reliable separation preventing function.

First claim

1 . A separation preventive pipe joint comprising:
a socket formed on an end of a first pipe; and a spigot formed on an end of a second pipe, the spigot being inserted into the socket, wherein the socket has a lock ring storage groove on an inner periphery of the socket, the lock ring storage groove accommodating (i) a metallic lock ring engageable with a protrusion formed on an outer surface of the spigot, and (ii) a cushioning material that comes into contact with a bottom of the lock ring storage groove and a side wall of a socket opening, the cushioning material being made of a material softer than the lock ring.

2 . The separation preventive pipe joint according to claim 1 , wherein the cushioning material is configured such that if a pipe having the socket and a pipe having the spigot are connected in a deflected state, a contact area of the cushioning material with the lock ring is deformed to expand in a circumferential direction according to an increase in force in a direction that separates the spigot from the socket.

3 . The separation preventive pipe joint according to claim 1 , wherein the cushioning material is made of resin.

4 . The separation preventive pipe joint according to claim 1 , wherein the lock ring has a socket opening side where a surface inclines outward, and the cushioning material has a socket rear side where a surface inclines inward so as to come into contact with the inclined surface of the lock ring.

5 . A pipeline constituent member comprising:
a separation preventive pipe joint, said separation preventive pipe joint including:
a socket formed on an end of a first pipe; and
a spigot formed on an end of a second pipe, the spigot being inserted into the socket,
wherein the socket has a lock ring storage groove on an inner periphery of the socket, the lock ring storage groove accommodating (i) a metallic lock ring engageable with a protrusion formed on an outer surface of the spigot, and (ii) a cushioning material that comes into contact with a bottom of the lock ring storage groove and a side wall of a socket opening, the cushioning material being made of a material softer than the lock ring.

Assignees

• Kubota Kk

Inventors

• Ochi Takatoshi
• Nishimaki Nobumitsu

Classifications

• F16L21/03

  placed in the socket before connection ({F16L21/022,} F16L21/025 take precedence) · CPC title

• F16L21/007 Primary

  clamped by a wedging action (F16L27/00, F16L37/092, F16L37/122, F16L37/123, F16L37/15, F16L37/16 take precedence) · CPC title

• F16L23/0286

  the shoulder not being formed from the pipe · CPC title

• F16L27/1017

  Joints with sleeve or socket · CPC title

• F16L27/1012

  Flanged joints · CPC title