JPS5930246B2 - Optical fiber submarine cable connection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connection between a waterproof tube for protecting an optical fiber core and an optical fiber connector housing casing in an optical fiber submarine cable.

When laying and hoisting submarine optical fiber cables, complex fluctuating loads are applied to the cables due to waves, the movement of the laying ship, and other factors. When the water pressure tube provided on the outer periphery of the nine-fiber core assembly to protect the optical fiber core from seawater pressure is fixed and connected to the water pressure resistant housing for protecting the fiber connection part, the water pressure tube Repeated impact force and expansion/contraction stress are concentrated on the pipe, causing fatigue rupture of the water pressure pipe, which is dangerous.
In order to solve the above-mentioned drawbacks, this invention provides a water pressure resistant casing for housing a plurality of optical fiber core connection parts of an optical fiber submarine cable to a water pressure resistant pipe for protecting the optical fibers of the optical fiber submarine cable. This is a connecting device for optical fiber submarine cables that can be connected in a watertight and slidable manner and that can reduce impact on the connecting portion. Hereinafter, the optical fiber submarine cable connection device of the present invention will be explained with reference to the attached drawings. Fig. 1 is a sectional view of an optical fiber submarine cable implementing the connection device of the present invention, in which 1 is a central expansion force body; 2 is an optical fiber core assembly wound or bundled around it, 3 is a holding layer, 4 is a coating layer thereon, 5 is a waterproof pressure tube for protecting the core wire, and 6 is a coating thereon. Layer, T, 8 is the external expansion field line.

FIG. 2 is a partially cutaway view of a connecting device showing an embodiment of the optical fiber submarine cable of the present invention, in which the same reference numerals as in FIG. 1
0 is a metal sleeve that can be fitted over the water pressure pipe 5; 11;
is a through hole provided around the metal sleeve 10,
This is filled with silver solder or adhesive to fix the metal sleeve 10 to the water pressure pipe 5. Reference numeral 12 denotes a water pressure resistant housing for protecting the optical fiber core wire connection portion, and 13 indicates a narrow neck at the end of the water pressure resistant housing 12, which slides onto the metal sleeve 10 through an O-ring 14 in a watertight manner. .

15 is a stopper formed by bending one end of the metal sleeve 10; 16 is a stopper fixed near the other end of the metal sleeve 10; Spring retainer, 19,2
0 is the spring receiver 17, 18 and the stopper 15,
The metal sleeve 10, which is a buffer spring interposed between the metal sleeve 16 and fixed to the water pressure pipe 5, and the water pressure casing 12 slide relative to each other, so that the water pressure casing 12 closes to the stopper 15,1.
This is to reduce the impact when colliding with 6.

Although the external expansion force lines 7 and 8 are not shown, they are fixed outside the water pressure casing 12, as is the case with ordinary submarine cables.

The optical fiber submarine cable connection device of the present invention includes a water pressure resistant housing housing several optical fiber core wire connection parts as described above, which is fixed to a water pressure resistant pipe for protecting the optical fibers of the optical fiber submarine cable. Since it is connected to the sleeve in a watertight and slidable manner, and a buffer spring is interposed at the connection part, fluctuating loads act on the optical fiber submarine cable, preventing it from becoming a pressure-resistant pipe for protecting the optical fiber core. Even if the water pressure resistant housing housing the cable core connection section moves relative to each other, the two can slide relative to each other and absorb the fluctuating load. Since there is a buffer spring that is restrained at both ends of the sleeve, there is no collision between the water pressure resistant housing and the metal sleeve, and no breakage occurs at the connection between the two no matter how much fluctuating load is applied. This has the advantage of not being scratched.

Furthermore, since the optical fiber submarine cable and the neck of the water pressure resistant housing are made slidable through the metal sleeve, the watertight structure is simplified and the watertightness thereof is improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an optical fiber submarine cable, and FIG. 2 is a partially cutaway sectional view of the optical fiber submarine cable connecting device of the present invention. In the figure, 1 is a central expansion force body, 2 is an optical fiber core assembly,
5 is a water pressure pipe for protecting the core wire, 7 and 8 are external expansion force lines, 9
10 is an optical fiber connection part, 10 is a metal sleeve, 12 is a water pressure resistant casing for protecting the optical fiber connection part, 13 is a narrow neck at the end of the water pressure resistant casing, 14 is an O-ring, 15 and 16 are Stoppers 1 and 19 represent buffer springs.

Claims (1)

[Claims] 1. A metal sleeve that is fixed to the neck of a water pressure resistant casing that houses a plurality of optical fiber core connection parts of an optical fiber submarine cable and a water pressure resistant pipe for protecting optical fibers of the optical fiber submarine cable is attached to the metal sleeve. and a connecting device for an optical fiber submarine cable, characterized in that the connecting portion is made to be slidable by interposing a buffer spring whose both ends are restrained by the water pressure resistant housing, and the connecting portion has a watertight structure.