公开(公告)号：US20200011454A1

公开(公告)日：2020-01-09

申请号：US16489078

申请日：2018-02-23

Applicant: SANDVIK INTELLECTUAL PROPERTY AB

Inventor： Erika HEDBLOM ,  Daniel EDMARKER

IPC: F16L9/02 ,  F16L9/14

Abstract: A tube structure (1) comprising an inner tube (3) of metal and an outer tube (2) of metal, wherein the inner tube (3) extends in the outer tube (2), wherein a spacer tube (4) is located between the inner tube (3) and the outer tube (2), wherein the spacer tube (4) comprises at least one slit (5), wherein the at least one slit (5) extends in a longitudinal direction of the spacer tube (4) and over an entire longitudinal extension of the spacer tube (4), and wherein the at least one slit (5) forms a space in a radial direction of the tube structure (1) extending from an outer surface (7) of the inner tube (3) to an inner surface (8) of the outer tube (2), wherein the tube structure (1) further comprises at least one signal line (9) located in the at least one slit (5) of the spacer tube (4), wherein the at least one signal line (9) extends in the longitudinal direction of the spacer tube (4).