Pipe joint structure, seal member, assembled condition management method for pipe joint, and assembled condition management device for pipe joint

Patent metadata

Field	Value
Publication number	US-10443772-B2
Application number	US-201415028539-A
Country	US
Kind code	B2
Filing date	Sep 29, 2014
Priority date	Oct 9, 2013
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A pipe joint structure provided with: a heel section configured so that a spigot formed on the end section of a pipe is inserted via a seal member into a socket formed in the end section of another pipe and seal member is fitted to a recessed section formed on the inner circumferential section of the socket; and a valve section compressed between the inner circumferential surface of the socket and the outer circumferential surface of the spigot. Additionally, a marker member is provided to the heel section that is accommodated in the recessed section. The socket circumference section of the pipe joint structure is subjected to non-contact inspection by a marker detection device from the spigot-side pipe along the axial direction of the pipe and the quality of the joining state of the pipe joint structure is determined on the basis of whether the marker member is detected.

First claim

The invention claimed is:

1. An assembled condition management method for a pipe joint in which a spigot that is formed in an end section of one of pipes to be joined is inserted into a socket that is formed in an end section of another one of the pipes, and a seal member is provided between the socket and the spigot, the seal member including: a heel section that is fitted to a recessed section formed in an inner circumferential section of the socket; and a bulb section that is compressed between an inner circumferential surface of the socket and an outer circumferential surface of the spigot, the heel section that is accommodated in the recessed section being provided with a marker member, the method comprising:
checking the marker member in a non-contact manner from a side of the spigot along a pipe axial direction in a state where the pipe joint is assembled.

2. An assembled condition management device in combination with a pipe joint in which a spigot that is formed at an end of one pipe to be joined is inserted into a socket that is formed at an end of another pipe, and a seal member is provided between the socket and the spigot, the seal member including: a heel section that is fitted to a recessed section formed in an inner circumferential section of the socket; and a bulb section that is compressed between an inner circumferential surface of the socket and an outer circumferential surface of the spigot, the heel section accommodated in the recessed section being provided with a marker member,
for the seal member, the assembled condition management device comprising:
a marker detection device configured to be joined with the pipe joint such that when joined, the marker detection device is configured to detect the marker member from the spigot-side pipe along an axial direction of the pipe in a non-contact manner.

3. The assembled condition management device according to claim 2 , wherein
the marker member is a colored member having a color different from a color of the seal member, and
the marker detection device includes an image capturing device with which whether there is the colored member is able to be determined with an image.

4. The assembled condition management device according to claim 3 , wherein a spigot-side contact piece that comes into contact with a spigot side pipe, and the image capturing device is attached to the spigot-side contact piece, and wherein the image capturing device is attached to the spigot-side contact piece via a movement mechanism that moves along the spigot-side outer circumferential surface.

Assignees

• Kubota Kk

Inventors

• Kishi Shozo
• Kagawa Takaaki
• Oda Keita
• Komaru Yuito

Classifications

• F16L1/10

  for aligning · CPC title

• F16L2201/10

  Indicators for correct coupling · CPC title

• E03F3/06

  Methods of, or installations for, laying sewer pipes (making pipes in situ F16L1/038 {; laying conduits in association with the digging of a trench E02F5/10; laying pipes in general F16L1/00}) · CPC title

• F16L1/09

  for bringing two tubular members closer to each other · CPC title

• F16L2201/60

  Identification or marking · CPC title