RU2248023C2 - Light guide - Google Patents

Abstract

FIELD: fiber-optic communications.

SUBSTANCE: device has body and elements for pressurization of light guide. In hollow of body pressurizing element is inserted, in form of resilient compactor vulcanized on optic cable with glue previously applied to vulcanization area and made with conic outer surface at one end, contacting with body, and at other end pressing nut is mounted. Between guiding elements of guide and body compacting rings are placed.

EFFECT: reliable operation under pressure up to P = 14,7106/Pa and under loads of up to 500g.

2 cl, 2 dwg

Description

The invention relates to techniques for transmitting signals, in particular to switching elements of fiber-optic communication lines.

Currently, the need has ripened for the use of fiber optic communication lines (FOCL) for outputting information from cameras inside which excessive pressure is created (pressure chambers).

The use of FOCLs in pressure chambers has until now been impossible due to the lack of fiber optic, sealed and shockproof conductors through which information can be output through the pressure chamber body to the measuring complexes.

Known hermetic insertion of a fiber light guide (z-ka Germany No. 3638549, G 02 B 6/36), based on the sealing of the light guide in the hole of a metal part. The solder outside the hole forms a body that seals the core of the optical cable without a sheath. The solder is adhered to both the outer region of the metal part and the long portion of the walls of the holes.

The disadvantage of the fiber is that at the solder point the optical cable is cleaned from the reflective sheath, which leads to a partial loss or distortion of the light signal.

Closest to the invention is a fiber connector (RF AS No. 1483420, G 02 B 6/36, publ. 05/30/89, BI No. 20), comprising a cylindrical body with an internal thread, a crimping nut, elements for clamping the fiber and an alignment an element in the form of an elastic sleeve.

The disadvantage of this fiber connector is that the design is leaky, which does not allow its use in pressure chambers.

The objective of the invention is to create a sealed fiber, its use in installations operating under high pressure up to P = 14.7 · 10 ⁶ Pa (150 kgf / cm ² ) and withstand shock overloads up to 500 g. The problem is solved in that in the fiber body having a cavity, a sealing element is introduced, which is an elastic sealant vulcanized on an optical cable with adhesive pre-applied to the vulcanization site and made with a conical outer surface at one of the ends in contact with the housing, and at its other end a compression nut is installed. O-rings are provided between the guide bushings and the housing.

Figure 1 shows the design of the fiber.

The optical fiber consists of a housing 1, in which a sealant 2 is installed with a pre-terminated optical cable 3, which is sealed with a housing 5 through the sleeve 5 and the housing 1. The optical cable 3 is fixed relative to the housing 1 by the guide bushings 6, the sealing rings 7 are installed between them. The bushings 8 are used to dock the mating parts.

Figure 2 shows the design of the seal.

On the optical cable 3, the rubber sealant is vulcanized.

Assembly is as follows.

A sealant made of a mixture of rubber is vulcanized on the optical cable 3, and glue is preliminarily applied to the place of vulcanization for better adhesion. The sealant has a tapered outer surface, which is installed in the housing 1 and sealed with a nut 4 through the sleeve 5. Then, guide sleeves 6 with sealing rings 7 and sleeves 8 are installed to couple the mating parts.

This constructive solution of the fiber has several advantages:

- the integrity of the sheath of the optical cable is not violated, which does not lead to partial loss or distortion of the light signal;

- the shape of the rubber seal allows you to simply and reliably seal it in the body of the fiber;

- when installing the rubber seal in the metal casing of the fiber, it is not necessary to take into account the temperature expansion coefficients of the materials.

Claims (2)

1. A fiber containing a housing with an optical cable installed in it, guide bushings for fixing the optical cable and a compression nut, characterized in that the fiber is equipped with a sealing element, which is an elastic sealant vulcanized on the optical cable with adhesive pre-applied to the vulcanization site and made with conical outer surface at one of the ends, sealed with the housing using a pinch nut located at the other end of the elastic seal, between the rails and bushings and the housing mounted sealing ring. 2. The fiber according to claim 1, characterized in that it is equipped with elements for docking the mating parts.

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