JPS60215189A - 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.

This type of high-pressure fluid transport pipe generally consists of a plastic pipe, an inner and outer metal reinforcing layer provided on the plastic pipe, and a plastic jacket provided on the outer metal reinforcing layer. The fluid transport pipe has an end fitting for connecting its end to equipment or the like. A prior art terminal fitting 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 screwed onto the fitting body. , the outer metal reinforcing layer is identified by a filler in the space between the fitting body and the cap, and the inner metal reinforcing layer is exposed in the space i; and the space is filled with epoxy resin or the like. It is filled with an agent. but,
This prior art terminal fitting may be used 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, or if the terminal fitting is installed. Sometimes! When the filler cracks due to i1F and its compressive strength decreases, the end of the metal reinforcing layer may become abnormal in the space between the collar that fixes the outer metal reinforcing layer and the fitting body. It had the disadvantage of being 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. One 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 a hill of 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 with a substantially U-shaped cross section, and a metal band with a substantially inverted U-shaped cross section on top of this first layer. A second layer 16b is formed by spirally winding the metal strips of the first layer so as to straddle adjacent turns and mesh with each other, and an outer metal reinforcing layer 18.
is formed by spirally winding a metal strip or metal wire in two layers at a pitch larger than that of the inner metal reinforcement wr16.

The terminal metal J410 is a metal fitting main body 2 that is liquid-tightly fitted to the exposed end 14a of the plastic pipe 14 of the fluid transport pipe 12.
2 and a cap 24 that is fluid-tightly fitted to the end of the plastic jacket 20 and screwed onto 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 seals compressed by plugs 26, 28 placed between them and screwed onto the fitting body 22 and the cap 24. held by rings 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', 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 identify the metal strips or metal wires on the inside of the outer metal reinforcing layer 18, and the collars 34' and 36' identify the metal strips or wires on the outside by being shifted in the axial direction from the collars 34 and 36. is fixed. 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 or phi-containing/hardening 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 the collar 34 can be electrodeposited with controlled thickness.

The radius of curvature R° of the concave surface 42a of the first adjustment ring portion 42 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 further outer layer. This is the sum of the thickness t2. As can be seen from FIG. 1, the reinforcing ring 40 has a relief 40a on the side of the plug 26 in order to allow the plug 26 to be screwed. Further, as can be seen from FIG. 2, a through hole 44a that penetrates in the radial direction is provided in the second adjustment ring portion 44, and the inner metal reinforcing layer 16 is inserted between the reinforcing ring 40 and the plastic pipe 14 through this through hole. Soft metals such as plastiac or lead 4
5 is molded. Note that a backing groove 44b is provided in which the backing 46 engages with blood that engages with the plug 26. If you do it like this.

The space between the metal fitting body 22 and the collar 34 is a reinforcing ring 4.
0, the compressive strength of the filler 38 will not be reduced even if the filler 38 is insufficiently filled, cavities occur, or even if high-temperature fluid passes through it or shock is applied during installation. Since a plastic or soft metal mold is provided between the adjustment ring 40 and the plastic pipe 14 to bury the inner metal layer 16, it is relatively easy to create a gap when the outer metal reinforcing layer 18 is folded back. The corners of the space between 34 and the inner metal reinforcing layer 16 are reinforced so that internal pressure resistance does not deteriorate. Note that this terminal fitting 10 has a plug 28. Cap 24. color 36.3
6'' into the fluid transport pipe 12, peel off the end of the fluid transport pipe 12, and place the collars 34, 3 on the outer metal reinforcing layer 18.
4' and collars 34, 36, 34', 36'
fixing the outer metal reinforcing layer 18, fitting the reinforcing ring 40, fixing the metal fitting body 22, adjusting the axial length of the reinforcing ring 40, molding the space inside the reinforcing ring 40, fixing the cap 24,
The plug 28 is fixed in sequence, 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 between the metal fitting body and the collar.

In particular, since a mold is formed so as to bury the inner metal reinforcing layer inside this reinforcing ring, there is a practical benefit of significantly improving internal pressure resistance.

[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-----1 high-pressure conduit transport pipe, 14-----plastic tube, 16.18--1 inner and outer metal reinforcing layers. 20------Plastic outer cover, 22------Metal fitting body, 24------Cap, 34.36.34'
, 36°---111 color, 38---filler, 4
0--1--Reinforcement ring. 45 - Molded plastic or soft metal.

Claims (1)

[Claims] The exposed end of the plastic chink pipe of a high-pressure fluid transport pipe comprising a plastic pipe, inner and outer metal reinforcing layers provided on the plastic pipe, and a plastic jacket provided on the outer metal reinforcing layer. It consists of a metal fitting body that is liquid-tightly fitted to the metal fitting body, and a cap that is liquid-tightly fitted to the plastic jacket and screwed to the metal fitting body, and the end of the outer metal reinforcing layer is formed between the metal fitting body and the cap. In an end fitting of a high-pressure fluid transport pipe, the end of the inner metal reinforcing layer is fixed by a collar in a space between, and 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 on an end of the inner metal reinforcing layer exposed in the space between An end fitting for a high-pressure fluid transport pipe, characterized in that a plastic or soft metal mold is provided so as to bury the metal reinforcing layer, and the filler is filled so as to bury the reinforcing ring.