JPS60215186A - Terminal fitting for high-pressure fluid transport pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the terminal fitting of high-pressure fluid transport pipes such as oil pipes and water pipes installed on the seabed.

High-pressure fluid transport pipes of this type generally consist of a plastic pipe, an inner and outer metal reinforcing layer provided on the plastic pipe, and a plastic jacket placed on the outer metal reinforcing layer. The fluid transport pipe has an end fitting for connecting its end to equipment or the like. The prior art terminal fitting consists of a fitting body that is liquid-tightly fitted to the exposed end of the plastic pipe of the fluid transport pipe, and a camp that is liquid-tightly fitted to the plastic jacket and screwed to the fitting body. The outer metal reinforcing layer is fixed by a collar in the space between the fitting body and the cabinet, the inner metal reinforcing layer of the case is exposed in the space, and a filler such as epoxy resin is placed in the space. is filled and formed. However, the end fittings of this prior art may be damaged if the filler is insufficiently filled or there are cavities in the filler, or if the transport fluid is at a very high temperature and the compressive strength of the filler is reduced. If the compressive strength of the filler is reduced due to shock during installation, the edge of the metal reinforcement layer may become abnormal in the space between the collar that fixes the outer metal reinforcement layer and the fitting body. This had the disadvantage that it was easily destroyed by internal pressure.

An object of the present invention is to provide an end fitting for a high-pressure fluid transport pipe that can prevent destruction due to such internal pressure.

Embodiments of the present invention will be described in detail with reference to the drawings. 1 drawing shows an end fitting 10 of a high pressure fluid transport pipe according to the present invention, and a high pressure fluid transport pipe 12 is connected to a plastic pipe 14 and on the plastic pipe 14. It consists of an inner and outer metal reinforcing layer 16,18 provided and a plastic jacket 20 provided on the outer metal reinforcing layer 18. In the illustrated embodiment, the inner metal reinforcing layer 16 includes a first layer 16a formed by spirally winding a metal band having a substantially U-shaped cross section, and a section (2) having a substantially inverted U-shaped cross section on top of this first layer 16a. A second layer 16b is formed by spirally winding a metal strip so as to straddle adjacent turns of the first layer metal strip, and the outer metal reinforcing layer 18 is formed by wrapping a metal strip or metal wire inside. It is formed by spirally winding two layers at a pitch larger than that of the metal reinforcing layer 16.

The terminal fitting 10 includes a fitting main body 22 that is liquid-tightly fitted to the exposed end 14a of the plastic pipe 14 of the fluid transport pipe 12.
and a camp 24 that is fluid-tightly fitted to the end of the plastic jacket 20 and screwed to the metal fitting body 22.

The liquid tightness between the fitting body 22 and the silastic pipe 14 and between the cap 24 and the plastic jacket 20 is compressed by plugs 26, 28 arranged therebetween and screwed to the fitting body 22 and the cap 24. Retained by sealing rings 30.32. In the space 23 between the fitting body 22 and the cap 24, the outer metal reinforcement N18
are fixed by inner and outer collars 34.3'6.34", 36", and the ends of the inner metal reinforcing layer 16 are exposed in stages. The space 23 is filled with a filler 38 such as epoxy resin.The collars 34 and 36 fix the metal strips or wires inside the outer metal reinforcing layer 8, and the collars 34' and 36' The outer metal strip or metal wire is fixed by shifting it in the axial direction from the collar 34.36.
are doing. Of course, the inner and outer metal strips or metal wires of the outer metal reinforcing layer 8 may be fixed simultaneously using the collars 34 and 36.

The terminal fitting 10 of the present invention has an inner metal reinforcing layer 16 exposed in the space 23. A reinforcing ring 40 is disposed between the end surface of the metal fitting main body 22 and the collar 34, and the filler 38 is filled so as to embed the reinforcing ring 4o. In addition to metal, the reinforcing ring 40 can be made of a material with high mechanical strength such as plastic or fiber-containing hardened resin. The reinforcing ring 40 is attached to the collar 34 as shown in FIG.
A first adjustment ring part 42 that has a concave surface 42a along the end face of the plug 26 and engages with the collar 34; and the control ring portion 44 of the frozen confectionery 2 to be combined, so that the first
The axial length can be adjusted by adjusting the screw engagement of the first and second adjustment ring portions 42, 44 to bring the plug 26 and the collar 34 into close contact.

The radius of curvature R' of the four surfaces 42a is the sum of the radius of curvature R of the lower surface of the collar 34 and the thickness tl of the inner layer of the outer metal reinforcing layer 18, or the sum of R, tl, and the thickness t2 of the outer layer. As can be seen from FIG. 1, the reinforcing ring 40 has an escape 40a on the side of the plug 26 in order to make it possible to secure the plug 26.
has. As can also be seen in FIG. 2, there are also through holes 44 extending radially through the second adjustment ring portion 44 to allow the filler 38 to penetrate inside the reinforcing ring 40.
A is provided, and a banking groove 44b into which the backing 46 engages is further provided on the surface that engages with the plug 26.

In this way, the space 1 between the fitting main body 22 and the collar 34 is reinforced by the reinforcing ring 40, so even if there is insufficient filling of the filler 38 or the formation of cavities, the space 1 between the metal fitting main body 22 and the collar 34 will be reinforced, and even if there is insufficient filling of the filler 38 or the occurrence of cavities, or when high temperature fluid passes through or during installation. Even if an impact is applied, the compression resistance of the filler 38 will not be reduced, and the internal pressure resistance will not be reduced. Gear pump 24. fitting the collar 36, 36' to the fluid transport tube 12;
Peel off the end of the fluid transport tube 12.

Fit the collar 34.34” into the hill of the outer metal reinforcement layer 18
7. Fixing the outer metal reinforcing layer 18 at 34, 36, 34°, and 36°, fitting the reinforcing ring 40, fixing the metal fitting body 22, adjusting the shaft length of the reinforcing ring 40, and gear pump 24. and the plug 28, and finally the filler 38 is fixed.
can be filled and assembled.

According to the present invention, as described above, the reinforcing ring reliably prevents destruction due to internal pressure in the space between the metal fitting body and the collar in the cap internal air space, thereby improving internal pressure resistance. Since the reinforcing ring can be closely attached to the fitting body and the collar by adjusting its axial length, there is a practical advantage that assembly is easy.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the upper half of the terminal fitting of a high-pressure fluid transport pipe according to the present invention, and FIG. 2 is a longitudinal cross-sectional view of the upper half of the metal reinforcing ring used in the present invention. - one terminal fitting;
12-----1 high-pressure fluid transport pipe, 14-----Plastic pipe, 16.18-----1 internal and external metal reinforcing layer. 20---Plastic jacket, 22---11 Metal fitting body, 24---Cap, 34.36, 34°
, 36'----one color, 38----filler, 4
0'---One reinforcing ring. 42.44 - - One regulatory ring moiety.

Claims (1)

[Claims] 7. MA of the high pressure fluid transport pipe consisting of a plastic pipe, inner and outer metal reinforcing layers provided on the plastic pipe, and a plastic jacket provided on the entire outer reinforcing layer.7. The metal fitting body is liquid-tightly fitted to the exposed end of the pipe, and the cap is liquid-tightly fitted to the plastic jacket and screwed onto the metal fitting body. The plateau fluid transport pipe is fixed by a collar in the space between the main body and the cap, and the end of the metal reinforcing layer on the side facing 11 is exposed in the space, and the space is filled with a filler. In the terminal fitting, a reinforcing ring is disposed between the fitting body and the collar on an end of the inner metal reinforcing layer exposed in the space between the fitting body and the cap, and the reinforcing ring is arranged between the fitting body and the collar. It consists of two adjustable ring parts that are joined in a phase π whose axial length can be adjusted so as to be in close contact with the metal fitting body and the collar, and the filler is filled so as to embed the reinforcing ring. An end fitting for a high-pressure fluid transport pipe characterized by k.