JP2009121618A - Fluid conveying hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid conveying hose which facilitates mounting work of a float even in the deep sea. <P>SOLUTION: A buffer layer 9 in an area corresponding to at least a float collar 3 is constituted by winding a strip of foamed material 12 and a ribbon non-foaming material 13 having a thickness of 0.9-1.0 times of that of the foamed material 12 so as to be in parallel spirally with respect to the axial direction of the hose. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fluid transfer hose, and more particularly, in a large-diameter hose for fluid handling used underwater such as a marine hose so that a float can be easily attached even when used in a deep water place. The present invention relates to a fluid transport hose.

  Large diameter hoses for fluid handling, represented by marine hoses, may be used in a state where they are submerged in the sea, so they have internal pressure resistance against fluids sent at high pressure and external pressure resistance against water pressure in the sea. It is necessary to strictly prevent the fluid from leaking outside the hose. Therefore, in this type of fluid transport hose, a plurality of carcass layers made of organic fiber cords are arranged as reinforcing layers on the outside of the inner rubber layer having erosion resistance to the fluid to improve the pressure resistance. . In addition, these carcass layers have a structure in which a buffer layer made of a foam material is provided between the carcass layers in order to alleviate the pressure exerted on the inner carcass layer when the outer carcass layer breaks. (For example, refer to Patent Document 1). Further, as shown in FIG. 4, a plurality of float collars 3 are formed on the outer peripheral surface of the hose body 1 of the fluid conveyance hose so as to project annularly at a predetermined interval in the hose axial direction. In addition, the float 4 is attached as shown in FIG. 5 so that the buoyancy of each part of the hose can be adjusted.

  However, when such a fluid conveyance hose is used in a place where the water depth is deep, the buffer layer made of the foam material is compressed and deformed by a high water pressure, and thus wrinkles extending in the hose axial direction are generated on the surface of the hose body 1. Since this wrinkle deforms the float collar 3, there is a problem that the work of attaching the float 4 to the float collar 3 in the sea becomes extremely difficult.

As a countermeasure, for example, it is conceivable to increase the compressive strength by lowering the foam density of the foam material of the buffer layer. However, since the rigidity of the foam material is increased, there is a problem that the workability of the buffer layer is deteriorated at the time of manufacturing the hose.
JP 2004-125125 A

  An object of the present invention is to provide a fluid transfer hose that can easily perform a float mounting operation even in deep sea.

  In order to achieve the above object, the fluid carrying hose according to the present invention includes a plurality of carcass layers disposed between the inner rubber layer and the cover rubber layer, and is made of a foam material between at least two carcass layers. In the fluid transfer hose in which a buffer layer is arranged and an annular float collar is intermittently formed in the hose axial direction on the outer peripheral surface of the cover rubber layer, at least the buffer layer in a region corresponding to the float collar is formed in a band-like shape. The foam material and a ribbon-shaped non-foam material having a thickness 0.9 to 1.0 times the thickness of the foam material are configured to be wound in a spiral with respect to the hose axial direction in parallel. It is a feature.

  It is desirable to use a natural rubber sponge as the foam material.

  The width of the ribbon-like non-foaming material is preferably 0.04 to 0.25 times the width of the belt-like foaming material.

  The fluid conveyance hose of the present invention is particularly preferably used for a marine hose for petroleum conveyance.

  According to the fluid conveyance hose of the present invention, at least the buffer layer in the region corresponding to the float collar formed on the outer peripheral surface is formed into a strip-shaped foam material and 0.9 to 1.0 times the thickness of the foam material. The ribbon-shaped non-foaming material with a thickness of 5 mm is wound in parallel with the hose axial direction, so that the ribbon-shaped non-foaming material can be used against high water pressure in deep water. In order to support the band-shaped foam material so as to suppress the compression deformation, the float collar is prevented from being deformed without generating wrinkles on the outer peripheral surface of the hose body. Can do.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an example of a fluid transfer hose according to an embodiment of the present invention.

  In this fluid carrying hose, the connection fittings 2 are attached to both ends of the hose body 1 in a liquid-tight manner, and a plurality of float collars 3 are provided on the outer peripheral surface intermittently in the axial direction. The float collar 3 is formed so that a part of the outer peripheral surface of the hose body 1 protrudes in an annular shape, and the float 4 is selectively attached to the float collar 3 so that the buoyancy of each part of the hose can be adjusted. Yes.

  FIG. 2 shows an example of a partially enlarged cross section of the hose body 1.

  The hose body 1 includes a first inner carcass layer 6, a spiral wire reinforcing layer 7, a second inner carcass layer 8, a buffer layer 9, an outer carcass layer 10 and a cover rubber layer 11 in order on the outer periphery of the cylindrical inner rubber layer 5. It has a laminated structure.

  The inner rubber layer 5 is made of a material having excellent resistance to erosion to the fluid flowing in the hose. The first inner carcass layer 6 is formed by laminating a plurality of layers made of organic fiber cords arranged in a bias in the hose axial direction so that the cords cross each other, and part of these layers Is turned back at the end of the hose body 1 to form the second inner carcass layer 8. These inner carcass layers 6 and 8 mainly provide the hose body 1 with axial strength and moderate flexibility.

  The spiral wire reinforcing layer 7 is formed by winding a metal wire in a spiral shape around the outer periphery of the first carcass layer 6 at a predetermined pitch, and mainly gives the hose body 1 strength in the circumferential direction. This prevents kink from being generated when 1 is bent, and further prevents the hose body 1 from being crushed by external pressure.

  Similar to the inner carcass layers 6 and 8, the outer carcass layer 10 is configured by laminating a plurality of layers made of organic fiber cords arranged in a bias in the hose axial direction so that the cords cross each other. Yes.

  As will be described later, the buffer layer 9 is composed of the foam 12 as a main component, and is disposed between the inner carcass layers 6 and 8 and the outer carcass layer 10 so that the inner carcass layers 6 and 8 are damaged. Even in this case, the foam material 12 absorbs and relaxes the pressure so that the damage does not propagate to the outer carcass layer 10.

  In the configuration of such a fluid conveying hose, the hose of the present invention has at least a buffer layer 9 in a region corresponding to the float collar 3 as shown in FIG. The ribbon-shaped non-foamed material 13 having a thickness of 0.9 to 1.0 times the thickness is arranged in parallel, and the parallel strip-shaped foamed material 12 and the ribbon-shaped non-foamed material 13 are arranged in the hose axial direction. On the other hand, it is configured by winding in a spiral. Preferably, a spiral structure of a strip-like foam material 12 and a ribbon-like non-foam material 13 is formed over the entire length of the hose body 1. If the thickness of the non-foaming material 13 is less than 0.9 times the thickness of the foaming material 12, it becomes difficult to support the compressive deformation of the foaming material 12, so that wrinkles are generated on the outer peripheral surface of the hose body 1. The float collar 3 is deformed. If the thickness of the non-foaming material 13 exceeds 1.0 times, the outer peripheral surface of the hose body 1 locally protrudes and wrinkles are generated, so that the float collar 3 is similarly deformed.

  The material of the foam material 12 is not particularly limited as long as it is a flexible material containing bubbles, but preferably a natural rubber sponge is used. The material of the non-foaming material 13 is not particularly limited as long as it is a flexible non-foaming material. However, it is preferable to use vulcanized rubber, flexible resin, or the like.

  In this manner, the buffer layer 9 in the region corresponding to at least the float collar 3 of the fluid conveyance hose has a band-shaped foam material 12 and a thickness of 0.9 to 1.0 times the thickness of the foam material 12. By configuring the ribbon-like non-foaming material 13 to be spirally wound in the hose axial direction in parallel, the ribbon-like non-foaming material 13 is strip-shaped against high water pressure at a deep water depth. To prevent the foam 12 from being compressed and deformed, the outer periphery of the hose body 1 is not wrinkled and the float collar 3 is prevented from being deformed. Can do.

  The width X of the ribbon-like non-foaming material 13 may be anything that prevents extreme compressive deformation within a range that does not impair the buffer function of the foaming agent 12, and is 0.04-0 of the width Y of the belt-like foaming material 12. .25 times is desirable. If it is less than 0.04 times, the central part in the width direction of the foamed material 12 may be locally compressed and deformed or the non-foamed material 13 may buckle. If it exceeds 0.25 times, the amount of the foamed material 12 In some cases, the function of the buffer layer 9 may be hindered.

  The fluid conveyance hose of the present invention is not limited in use, but is preferably applied as a large-diameter hose for fluid cargo handling, and in particular to a marine hose that conveys oil sent from an offshore tanker in the sea. It can be used suitably.

It is a side view which shows the example of the hose for fluid conveyance which consists of embodiment of this invention. It is a partial cross section figure of the hose for fluid conveyance which consists of an embodiment of the present invention. It is explanatory drawing explaining the structure of a buffer layer. It is a side view which shows the example of a marine hose. It is a perspective view which shows the attachment method of the float to a float collar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hose main body 2 Connection metal fitting 3 Float collar 4 Float 5 Inner surface rubber layer 6 First inner carcass layer 7 Spiral wire reinforcement layer 8 Second inner carcass layer 9 Buffer layer 10 Outer carcass layer 11 Cover rubber layer 12 Band-shaped foam material 13 Ribbon Non-foamed material

Claims (4)

A plurality of carcass layers are disposed between the inner rubber layer and the cover rubber layer, a buffer layer made of a foam material is disposed between at least two carcass layers, and the hose axial direction is disposed on the outer peripheral surface of the cover rubber layer. In a fluid transfer hose that intermittently forms an annular float collar,
At least the buffer layer in the region corresponding to the float collar, a hose in parallel with a strip-like foam material and a ribbon-like non-foam material having a thickness of 0.9 to 1.0 times the thickness of the foam material A fluid transfer hose configured to be spirally wound in the axial direction.   The fluid transfer hose according to claim 1, wherein the foamed material is a natural rubber sponge.   The fluid conveyance hose according to claim 1 or 2, wherein a width of the ribbon-like non-foaming material is 0.04 to 0.25 times a width of the belt-like foaming material.   It is a marine hose for oil conveyance, The hose for fluid conveyance in any one of Claims 1-3.