Pipes and tubular conduits – Combined – With indicating means
Patent
1994-07-08
1995-05-09
Bryant, III, James E.
Pipes and tubular conduits
Combined
With indicating means
138103, 138109, 138125, 138137, 116264, F16L 5500
Patent
active
054131464
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a hose for transporting a fluid such as oil or the like in the sea or in the water, and more particularly relates to a hose in which damage to a pressure cord layer can be easily found even when it is used in the sea or in the water.
BACKGROUND ART
Conventionally, a hose line composed of a plurality of hoses connected end-to-end is used for loading a tanker with oil or the like, or unloading the tanker, because the tanker is generally moored offshore.
In the case where a hose used for the hose line is damaged in an emergency, oil leaks out from the hose line, and serious environmental pollution results. Therefore, the hose used for the hose line has a double construction in which an auxiliary pressure cord layer is provided outside the main pressure cord layer which provides a chamber into which fluid that has leaked through the main pressure layer flows. In the case where the main pressure cord layer is damaged, the fluid that leaks out from the main pressure cord layer is retained in the chamber enclosed by the auxiliary pressure cord layer. Accordingly, in the prior art, if the outer appearance of the hose is visually inspected to be changed, the damage in the hose is determined.
In this connection, when the hose is used in the sea, it is impossible to determine the occurrence of damage visually. Therefore, a detector is provided in the hose, by which a change in pressure of the fluid that has leaked out from the main pressure cord layer into the chamber is detected, and a signal sent from the detector is received by a receiver installed on the sea or ground, so that the occurrence of damage of the main pressure cord layer is determined.
When the hose is used in the sea as described above, it is necessary to provide auxiliary apparatus such as a detector and receiver. Therefore, the installation of the hose is complicated, and the cost of the hose is greatly increased.
Furthermore, the detector tends to be damaged and malfunctions tend to occur, so that the aforementioned detection system lacks reliability when it is used over a long period of time.
DISCLOSURE OF THE INVENTION
The present invention has been made in view of the foregoing problems of the prior art. It is therefore an object of the present invention to provide a hose characterized in that: installation of the hose is very easy; the cost is low; the reliability is high even if it is used over a long period of time; and damage in the hose can be easily detected.
In order to accomplish the above objects, the present invention provides a hose comprising: a main pressure cord layer for retaining and circulating a fluid; an auxiliary pressure cord layer sheathing the main pressure cord layer; and a chamber for retaining the fluid leaking from the main pressure cord layer, said chamber being formed between the main pressure cord layer and the auxiliary pressure cord layer, wherein the auxiliary pressure cord layer is capable of being deformed by the pressure of the fluid retained in the chamber, the hose further comprising a float moored on the hose, the float being connected to the hose through a connection member, wherein the connection member is fractured and the float is released from the hose when an amount of deformation of the auxiliary pressure cord layer has increased to a predetermined value.
The present invention is constructed in the manner described above when the main pressure cord layer is damaged and the transported fluid flows into the chamber, the auxiliary pressure cord layer is deformed by the fluid pressure. When an amount of deformation of the auxiliary pressure cord layer is increased to a predetermined value, the connecting member is fractured, so that the float is released from the hose and floats in the sea, Since the float is moored at the hose, it does not flow away but floats around the hose, the main pressure cord of which has been damaged. Consequently, when the floating float is discovered, it is possible to find the hose, the main pressure cord layer of which
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Kuroda Masuo
Ohoka Naoyuki
Wakabayashi Masashi
Yazaki Fumihiko
Bryant III James E.
The Yokohama Rubber Co. Ltd.
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