US 2012/0256416 A1 · HOUSING-TYPE PIPE JOINT

Abstract

Provided is a housing type pipe joint to enable the confirmation of an appropriate fastening degree of a joint and reduce a load of a fastening work. The housing-type pipe joint includes a pair of joint segments, an elastic seal ring, and a fastening means fastening the pair of joint segments, in which the joint segments each have an arc portion, flange portions extending from both ends of the arc portion, a concave groove formed in an inner peripheral surface of the arc portion to have the elastic seal ring fit therein, and in which the fastening means makes the flanges of the both joint segments approach each other to make the arc portions bend so that radii of curvature of the arc portions become smaller, and when, as a result of the bending, peripheral edges of the arc portions match outer surfaces of the pipes that are to be coupled, the coupling of the pipes is completed, the housing-type pipe joint including marks on the peripheral edge regions of the arc portions, wherein, when the peripheral edges of the arc portions corresponding to the marks come into contact with the outer surfaces of the pipes, the coupling of the pipes is completed.

Claims18

Dependent claims

A housing-type pipe joint that couples pipes facing each other,

which includes a pair of joint segments, an elastic seal ring, and a fastening means fastening the pair of joint segments, and
in which the joint segments each have an arc portion, flange portions extending from both ends of the arc portion, and a concave groove formed in an inner peripheral surface of the arc portion to have the elastic seal ring fit therein, and
in which the fastening means makes the flanges of the both joint segments approach each other to make the arc portions bend so that radii of curvature of the arc portions become smaller, and when, as a result of the bending, peripheral edges of the arc portions match outer surfaces of the pipes that are to be coupled, the coupling of the pipes is completed,
the housing-type pipe joint comprising marks on peripheral edge regions of the arc portions,
wherein, when positions of the peripheral edges of the arc portions corresponding to the marks come into contact with the outer surfaces of the pipes, the coupling of the pipes is completed.

2 more elements

A housing-type pipe joint which includes a pair of joint segments, an elastic seal ring, and a fastening means fastening flanges of the pair of joint segments and couples and fixes pipes each having a circumferential groove in a pipe end portion,

wherein the fastening means makes the flanges of the joint segments approach each other,
wherein the joint segments each have:
an arc portion;
flange portions extending from both ends of the arc portion;
a concave groove which is formed in an inner peripheral surface of the arc portion and in which the elastic seal ring is fit;
convex strip portions formed on both sides of the concave groove on the inner peripheral surface of the arc portion and rising in a radius direction of the arc portion;
and a mark provided on a peripheral edge region of the arc portion,
wherein, when the flanges of the joint segments are made to approach each other by the fastening means from a state where the convex strip portions are positioned in the circumferential grooves of the facing pipes, the joint segments bend in a direction so that radii of curvature of the arc portions of the joint segments become smaller and peripheral edges of the arc portions match outer surfaces of the pipes that are to be coupled, and the joint segments rotate in directions so that axes of the arc portions become parallel to a pipe axis and in opposite directions, and
wherein, when the arc portions bend until positions of the peripheral edges of the arc portions corresponding to the marks come into contact with the outer surfaces of the pipes, the convex strip portions are brought into pressure contact with far end-side walls and near end-side walls of the circumferential grooves and the coupling of the pipes is completed.

6 more elements

Dependencies are inferred from the claim text.

Housing-type pipe joint

Life of this patent

Housing-type pipe joint

Life of this patent

Abstract

Claims18