Void fraction sensor, flowmeter using the same, and cryogenic liquid transfer pipe
AssigneeKYOCERA Corporation
InventorKatsumi Nakamura
Life of this patent
Estimating the term…
Abstract
A void fraction sensor according to the present disclosure includes an insulating inner pipe having a through hole through which a low-temperature liquid flows, at least a pair of electrodes mounted on an outer peripheral surface of the insulating inner pipe, and a heat insulating layer covering an outer peripheral side of the insulating inner pipe. A flowmeter according to the present disclosure measures a flow rate of a cryogenic liquid flowing through the through hole of the insulating inner pipe, and includes the void fraction sensor described above, and a flow velocity meter that measures a flow velocity of the cryogenic liquid flowing through the through hole.
Claims16
A void fraction sensor, comprising:
- an insulating inner pipe having a through hole through which a cryogenic liquid flows;
- at least one pair of electrodes mounted on an outer surface of the insulating inner pipe;
- and
- a heat insulating layer covering an outer peripheral side of the insulating inner pipe, wherein
- the void fraction sensor further comprises:
- an annular portion provided at both ends of the insulating inner pipe;
- an outer pipe bonded to an outer peripheral portion of the annular portion and having a first insertion hole;
- and
- a first hermetic terminal provided in the first insertion hole and in which a conductive pin is fixed, the conductive pin connected to a corresponding electrode of the at least one pair of electrodes, in the first insertion hole, wherein
- the heat insulating layer is a vacuum space located between the insulating inner pipe and the outer pipe, wherein
- the first hermetic terminal comprises
- the conductive pin,
- a ceramic substrate having a disk shape and a first pin hole in a thickness direction in which the conductive pin is inserted, and
- an annular body surrounding an outer peripheral surface of the ceramic substrate, and
- the annular body is made of a Fernico alloy, an Fe—Ni alloy, an Fe—Ni—Cr—Ti—Al alloy, an Fe—Cr—Al alloy, an Fe—Co—Cr alloy, an Fe—Co alloy, an Fe—Co—C alloy, or an austenitic stainless steel having a nickel content of at least 10.4 mass %.
A void fraction sensor, comprising:
- an insulating inner pipe having a through hole through which a cryogenic liquid flows;
- at least one pair of electrodes mounted on an outer surface of the insulating inner pipe;
- and
- a heat insulating layer covering an outer peripheral side of the insulating inner pipe, wherein
- the insulating inner pipe is composed of an even number of dividable ceramic members arranged in a circumferential direction, and
- the void fraction sensor further comprises:
- a housing surrounding the insulating inner pipe and having a second insertion hole and a connection hole communicating with the through hole of the insulating inner pipe;
- an annular portion located outside of the housing and having an axial hole coaxial with the insulating inner pipe;
- an outer pipe bonded to an outer peripheral portion of the annular portion and having a first insertion hole;
- a first hermetic terminal fixing a conductive pin in the first insertion hole, the conduct pin connected to a corresponding electrode of the at least one pair of electrodes;
- and
- a second hermetic terminal fixing the conductive pin in the second insertion hole, and
- a vacuum space is located at least between the outer pipe and the housing.
Dependencies are inferred from the claim text.