JPS60215187A - 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 Misaki J relates to the improvement of terminal fittings for high-pressure fluid transport pipes such as oil pipes and water pipes installed on the seabed.

This type of high-pressure fluid transport pipe generally consists of a plastic pipe, inner and outer metal reinforcing layers provided on the plastic pipe, and a plastic jacket provided on one of the outer metal reinforcing layers. The fluid transport pipe has an end fitting for connecting its end to equipment or the like. The terminal fitting of the prior art consists of a fitting body that is liquid-tightly fitted to the exposed end of a plastic pipe of a fluid transport pipe, and a cap that is liquid-tightly fitted to a plastic jacket and enclosed in the fitting body. , the outer metal reinforcing layer is fixed by a collar in the space between the fitting body and the cap, the inner metal reinforcing layer is exposed in the space, and the space is filled with a filler such as epoxy resin. It is formed by 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.

The fourteenth objective of the present invention is to prevent the destruction caused by such internal pressure by μ)i
An object of the present invention is to provide an end fitting for a high-pressure fluid transport pipe that can be used for a high-pressure fluid transport pipe.

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, a high pressure fluid transport pipe 12 is connected to a plastic vibrator 14 and one part of the plastic pipe 14. It consists of an inner and outer metal reinforcing layer 16,18 provided at - and a plastic jacket 20 provided at the top of the outer metal reinforcing layer 18. In the illustrated example, the inner metal reinforcement Jg'16 is 1! Ml' layer 1 formed by spirally winding a substantially U-shaped metal band on the Ii plane
6a and on this first layer, a first metal strip having an approximately inverted U-shaped cross section is placed on top of the first layer.
The second layer 16b is formed by spirally winding the metal strips of the layer so as to straddle adjacent turns and mesh with each other. It is formed by spirally winding in two layers with a pitch larger than the one shown in the figure.

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 gear pump 24 that is fluid-tightly fitted to the end of the plastic jacket 20 and screwed to the metal fitting body 22. Liquid-tightness between the fitting body 22 and the plastic pipe 14 and between the cap 24 and the plastic jacket 20 is achieved by a system compressed by a plug 26, 28 placed between them and screwed onto the fitting body 22 and the cap 24. It is maintained by the i ring 30.32. In the space 23 between the metal fitting body 22 and the cap 24, the outer metal reinforcing layer 18
are fixed by inner and outer collars 34, 36, 34', 3B', and the ends of the inner metal reinforcing layer 16 are exposed in stages. While 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 18, and the collars 34' and 36° The outer metal strip or metal wire is fixed at a position shifted in the axial direction from the collars 34 and 36. Of course, the metal strips or wires inside and outside the outer metal reinforcing layer 18 may be fixed together by collars 34, 36.

The terminal fitting 10 of the present invention has an end surface of the fitting main body 22 and a collar 3 on the inner metal reinforcing layer 16 exposed in the space 23.
A reinforcing ring 40 is disposed between the reinforcing ring 40 and the reinforcing ring 40, and the filler 38 is filled so as to bury this reinforcing ring 40. Reinforcement ring 40
In addition to metal, it can be made of a material with high mechanical strength such as plastic, phi-containing resin, or hardened resin. As shown in FIG. 2, the reinforcing ring 40 includes a first adjustment ring portion 42 that has a concave surface 42a along the end surface of the collar 34 and engages with the collar 34, and is screwed into this adjustment ring portion 42. and a second adjustment ring portion 44 that engages with the end face of the plug 26 attached to the metal fitting body 22. Therefore, the axial length can be adjusted by adjusting the threaded engagement of the first and second adjustment ring portions 42 and 44. The plug 26 and collar 34 can be brought into close contact by adjusting the thickness.

In particular, as can be seen from FIG. 2, the first adjustment ring portion 42 on the side that is in close contact with the collar 34 is provided with an annular protrusion 42b that cuts into the space between the collar 34 and the inner metal reinforcing layer 16. . Radius of curvature R of the concave surface 42a of the first adjustment ring portion 42
' is the radius of curvature R of the lower surface of the collar 34 and the outer metal reinforcing layer 1
8 and the thickness tl of the inner layer or R,l! 1-tl
and the thickness L2 of the outer layer. As can be seen from FIG. 1, the reinforcing ring 40 has a recess 1f40a on the plug 26 side in order to allow the plaque 26 to be screwed. Further, as can be seen from FIG. 2, a radially penetrating through hole 44a is provided in the second adjustment ring portion 44 to allow the filler 38 to penetrate into the inside of the reinforcing ring 40. A backing groove 44b into which the backing 46 engages is provided on the surface that engages with the plug 26.

In this way, the space between the metal fitting body 22 and the collar 34 is reinforced by the reinforcing ring 40, so the filler 3
Even if the filler 38 is insufficiently filled or cavities occur, or even if high-temperature fluid passes through it or shock is applied during installation, the compressive strength of the filler 38 will not be reduced, and the Since an annular protrusion 42b is provided between the collar 34 and the inner metal reinforcing layer 16, corners where gaps are relatively likely to be formed are reinforced by folding the outer metal reinforcing layer 18, reducing internal pressure resistance. There's nothing to do.

Note that this terminal fitting 10 has a plug 28. Cap 24.
Fit the collar 36, 36' onto the fluid transport tube 12 and peel off the end of the fluid transport tube 12.

A collar 34. is applied over the outer metal reinforcing layer 18. Fitting '34' and fixing outer metal reinforcing layer 18 with collar 34, 36, 34', 3B', -fitting of reinforcing ring 40, fitting main body 2
2, adjustment of the axial length of the reinforcing ring 40, and cap 24.
and the plug 28 are sequentially fixed, and finally, the filler 38 is filled and assembled.

According to the present invention, as described above, the reinforcing ring reliably prevents breakage due to internal pressure in the space within the cap 7 between the metal fitting body and the collar.

In particular, since the reinforcing ring is provided with an annular protrusion that bites between the collar and the inner metal reinforcing layer, the internal pressure resistance can be significantly improved, which is a practical benefit.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of the upper half of the end fitting of a high-pressure fluid transport pipe according to the present invention, and FIG. 2 is a vertical cross-sectional view of the upper half of the metal reinforcing ring used in the present invention. --One terminal fitting,
12-----High pressure fluid transport pipe, 14-----Plastic pipe, 16', I 8-----Metal reinforcing layer inside and outside. 20---Plastic jacket, 22---11 Metal fitting body, 24---Cap, 34, 36, 34
', 36'----collar, 38----filler, 40----one reinforcing ring. 42b---Annular projection. special j1 applicant

Claims (1)

[Claims] Plastic pipe and the plastic pipe 1-
17. A high-pressure fluid transport pipe comprising an inner and outer metal reinforcing layer provided on the outer metal reinforcing layer and a plastic jacket provided on the outer metal reinforcing layer. 1) The end of the metal reinforcing layer on the metal fitting side is connected to the metal fitting body and the cap, which is liquid-tightly fitted to the plastic jacket and screwed to the metal body. In the terminal fitting of a high-pressure fluid transport pipe, the end fitting of a high-pressure fluid transport pipe is fixed by a collar in a space between the fitting body, the end of the inner metal reinforcing layer is exposed in the space, and the space is filled with a filler; A reinforcing ring is disposed between the metal fitting body and the collar at the end of the inner metal reinforcing layer described in 11j exposed in the space between An end fitting for a high-pressure wave body transport pipe, characterized in that an annular protrusion that bites between the collar and the inner metal reinforcing layer is provided, and the filler is filled so as to embed the reinforcing ring.