Heat insulation pipe
AssigneeHonda Motor Co., Ltd.
InventorRyosuke Hayashi
Life of this patent
Estimating the term…
Abstract
A heat insulation pipe includes an inner pipe and an outer pipe. The inner pipe includes a pair of inner pipe members spaced apart from each other in an axial direction of the inner pipe, a first bellows disposed between the pair of inner pipe members, and a restriction mechanism for restricting expansion and contraction of the inner pipe in the axial direction to a predetermined range. The restriction mechanism is slidable with respect to at least one of a pair of bulging portions. The outer pipe includes a pair of outer pipe members each including a second bellows, and a second cylindrical portion housing the first bellows and the restriction mechanism.
Claims13
A heat insulation pipe comprising an inner pipe and an outer pipe containing thereinside the inner pipe, wherein both ends of the outer pipe are joined to the inner pipe to thereby seal an inside of the outer pipe, wherein
- the inner pipe includes:
- a pair of inner pipe members each including a first cylindrical portion and a bulging portion that protrudes radially outward from an outer circumferential surface of the first cylindrical portion, the pair of inner pipe members being spaced apart from each other in an axial direction of the inner pipe;
- a first bellows disposed between the pair of inner pipe members and configured to absorb thermal expansion or thermal contraction of a pipe caused by a temperature of a fluid flowing through an inside of the pipe;
- and
- a restriction mechanism that is coupled to the bulging portion of one of the pair of inner pipe members and to the bulging portion of another of the pair of inner pipe members, and configured to restrict expansion and contraction of the inner pipe in the axial direction to a predetermined range,
- the restriction mechanism is slidable with respect to at least one of a pair of the bulging portions, and
- the outer pipe includes:
- a pair of outer pipe members each including a second bellows expandable and contractible along the axial direction of the inner pipe, the pair of outer pipe members being joined respectively to the pair of inner pipe members;
- and
- a second cylindrical portion disposed between the pair of outer pipe members and configured to accommodate the first bellows and the restriction mechanism.
A heat insulation pipe comprising an inner pipe and an outer pipe containing thereinside the inner pipe, wherein both ends of the outer pipe are joined to the inner pipe to thereby seal an inside of the outer pipe, and a space between the inner pipe and the outer pipe is depressurized to a predetermined pressure, wherein
- the inner pipe includes:
- a pair of inner pipe members spaced apart from each other in an axial direction of the inner pipe;
- a first bellows disposed between the pair of inner pipe members and configured to absorb thermal expansion or thermal contraction of a pipe caused by a temperature of a fluid flowing through an inside of the pipe;
- and
- a restriction mechanism configured to restrict, to a predetermined range, an amount of deformation of the inner pipe in the axial direction caused by the temperature of the fluid when the fluid flows through the inner pipe,
- the outer pipe includes:
- a pair of outer pipe members each including a second bellows expandable and contractible along the axial direction of the inner pipe, the pair of outer pipe members being joined respectively to the pair of inner pipe members;
- and
- a second cylindrical portion disposed between the pair of outer pipe members and configured to accommodate the first bellows and the restriction mechanism,
- a cross section of the first bellows along an axial direction of the first bellows is a first corrugated cross section having crest portions each curved in a C-shape or a U-shape and root portions each curved in a C-shape or a U-shape, and
- a cross section of the second bellows along an axial direction of the second bellows is a second corrugated cross section having crest portions each bent in a V-shape and root portions each bent in a V-shape,
- the restriction mechanism includes a connection rod extending along the axial direction of the inner pipe, and
- the connection rod is placed across the pair of inner pipe members.
A heat insulation pipe comprising an inner pipe and an outer pipe containing thereinside the inner pipe, wherein both ends of the outer pipe are joined to the inner pipe to thereby seal an inside of the outer pipe, and a space between the inner pipe and the outer pipe is depressurized to a predetermined pressure, wherein
- the inner pipe includes:
- a pair of inner pipe members spaced apart from each other in an axial direction of the inner pipe;
- a first bellows disposed between the pair of inner pipe members and configured to absorb thermal expansion or thermal contraction of a pipe caused by a temperature of a fluid flowing through an inside of the pipe;
- and
- a restriction mechanism configured to restrict, to a predetermined range, an amount of deformation of the inner pipe in the axial direction caused by the temperature of the fluid when the fluid flows through the inner pipe,
- the outer pipe includes:
- a pair of outer pipe members each including a second bellows expandable and contractible along the axial direction of the inner pipe, the pair of outer pipe members being joined respectively to the pair of inner pipe members;
- and
- a second cylindrical portion disposed between the pair of outer pipe members in the axial direction of the inner pipe at a position where the second cylindrical portion does not accommodate the second bellows, and configured to accommodate the first bellows and the restriction mechanism,
- a cross section of the first bellows along an axial direction of the first bellows is a first corrugated cross section having crest portions each curved in a C-shape or a U-shape and root portions each curved in a C-shape or a U-shape, and
- a cross section of the second bellows along an axial direction of the second bellows is a second corrugated cross section having crest portions each bent in a V-shape and root portions each bent in a V-shape.
Dependencies are inferred from the claim text.