CN216670341U

CN216670341U - Fire-resistant field optical cable

Info

Publication number: CN216670341U
Application number: CN202122897691.8U
Authority: CN
Inventors: 阚杰; 张培良; 马黎; 王梦乔
Original assignee: Anhui Optical Fiber And Optical Cable Transmission Technology Research Institute Eighth Research Institute Of China Electronics Technology Group Corp
Current assignee: Anhui Optical Fiber And Optical Cable Transmission Technology Research Institute Eighth Research Institute Of China Electronics Technology Group Corp
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-06-03
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a fire-resistant field optical cable and a manufacturing method thereof, relating to the technical field of field optical cables and comprising a cable core layer, wherein the cable core layer comprises a single or a plurality of quartz cable cores, and the outer wall of each quartz cable core is provided with a cable core coating; the outer wall of the cable core layer is coated with a stainless steel loose tube, the outer diameter of the stainless steel loose tube is 1.8 mm-2.3 mm, and the wall thickness is 0.15 mm-0.3 mm; the outer wall of the stainless steel loose sleeve is coated with a stainless steel armor layer, the stainless steel armor layer comprises a plurality of stainless steel wires which are twisted with each other, and the outer diameter of each stainless steel wire is 0.5-0.9 mm; the outer wall of the stainless steel armor layer is coated with an oxygen-isolating layer, and the thickness of the oxygen-isolating layer is 0.2 mm-0.6 mm; the outer wall of the oxygen-isolating layer is wrapped with a fire-resistant layer, and the thickness of the fire-resistant layer is 2.0 mm-5 mm. The fire-resistant field optical cable adopts double protection of the stainless steel loose tube and the stainless steel wire armor layer, can bear a combustion environment at 750 ℃, has a more stable structure, has better mechanical properties while ensuring normal communication of optical signals, and meets the requirements of mechanical properties such as mechanical impact, stretching, pressure and the like in a field scene.

Description

Fire-resistant field optical cable

Technical Field

The utility model relates to the technical field of field optical cables, in particular to a fire-resistant field optical cable.

Background

The field operation optical cable can be used for rapid networking communication in special scenes, the application environment has the characteristics of complexity, rigor and the like, and the application scenes comprise oil fields, mines, Gobi, ports, bridges, ships, communication line rush-repair and the like. The field operation optical cable can resist the mechanical destructive power that external environment caused in the use, has characteristics such as certain tensile, resistance to compression, shock resistance, however when the application of some fire-resistant scenes, traditional field operation optical cable adopts fire-retardant technology to reduce the flame of optical cable through designing fire-retardant material in the optical cable and prolongs burning length, can not guarantee the circuit integrality of optical cable under flame, and the mechanical properties of traditional field operation optical cable under flame will descend by a wide margin simultaneously, can not provide more reliable safety communication.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides the field operation optical cable with fire resistance, high temperature resistance and better mechanical property.

The utility model adopts the following technical scheme: the fire-resistant field optical cable comprises a cable core layer, wherein the cable core layer comprises a single or a plurality of quartz cable cores, and cable core coatings are arranged on the outer walls of the quartz cable cores; the outer wall of the cable core layer is coated with a stainless steel loose tube, the outer diameter of the stainless steel loose tube is 1.8 mm-2.3 mm, and the wall thickness is 0.15 mm-0.3 mm; the stainless steel loose tube is characterized in that the outer wall of the stainless steel loose tube is coated with a stainless steel armor layer, the stainless steel armor layer comprises a plurality of stainless steel wires which are twisted with each other, the outer diameter of each stainless steel wire is 0.5-0.9 mm, and the twisting pitch is 30-60 mm; an oxygen-isolating layer is coated on the outer wall of the stainless steel armor layer, and the thickness of the oxygen-isolating layer is 0.2 mm-0.6 mm; the outer wall of the oxygen isolation layer is wrapped with a fire-resistant layer, and the thickness of the fire-resistant layer is 2.0-5 mm.

As an optimized scheme, the cable core coating is any one of gold plating, copper plating or aluminum plating;

as an optimized scheme, the oxygen isolation layer adopts any one of a ceramic mica tape, a gold mica tape, a composite mica tape or a synthetic mica tape.

As an optimized scheme, the fire-resistant layer is any one of ceramic ring polyolefin and ceramic silicon rubber.

Compared with the prior art, the utility model has the advantages that:

the fire-resistant field optical cable adopts double protection of the stainless steel loose tube and the stainless steel wire armor layer, can bear a combustion environment at 750 ℃, has a more stable structure, has better mechanical properties while ensuring normal communication of optical signals, and meets the requirements of mechanical properties such as mechanical impact, stretching, pressure and the like in a field scene. The utility model adopts the oxygen isolation layer and the fire-resistant layer as fire-resistant design, avoids the problem that the traditional field operation optical cable can not survive in the flame environment, and can effectively provide the circuit integrity under the flame.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of a fire-resistant field optical cable of the present invention;

wherein, the cable comprises 1-quartz cable core, 2-cable core coating, 3-stainless steel loose tube, 4-stainless steel armor layer, 5-oxygen isolation layer and 6-fire-resistant layer.

Detailed Description

Hereinafter, in order to facilitate understanding of the technical solution of the present invention by those skilled in the art, further description will be made with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the utility model. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1, a cross-sectional view of an embodiment of the fire-resistant optical field cable according to the present invention is shown, wherein the fire-resistant optical field cable includes a cable core layer, a stainless steel loose tube 3, a stainless steel wire armor layer 4, an oxygen-insulating layer 5 and a fire-resistant layer 6, the stainless steel loose tube 3 is wrapped on the outer side of the cable core layer, the stainless steel wire armor layer 4 is disposed on the outer side of the stainless steel loose tube 3, the oxygen-insulating layer 5 is wrapped on the outer side of the stainless steel wire armor layer 4, and the fire-resistant layer 6 is wrapped on the outer side of the oxygen-insulating layer 5.

The cable core layer comprises a single or a plurality of quartz cable cores 1, the quartz cable cores 1 are quartz glass optical fibers, the quartz cable cores 1 can be coated with any one of gold plating, copper plating or aluminum plating materials to form a cable core coating 2, a stainless steel loose tube 3 is formed by drawing a stainless steel band and performing a laser welding process, the outer diameter of the stainless steel loose tube 3 is 1.8 mm-2.3 mm, the wall thickness is 0.15 mm-0.3 mm, the quartz cable cores 1 are distributed approximately in a sine shape in the stainless steel loose tube 3 to form 1 per thousand-3 per thousand of residual length, so that the quartz cable cores 1 do not pull when being subjected to tensile tension, and the quartz cable core layer has the advantage of flame ablation resistance. Stainless steel wire armor 4 adopts the external diameter to be 0.5mm ~ 0.9 mm's stainless steel wire through the formation of transposition each other, and the design of transposition pitch is 30mm ~ 60mm, and in this embodiment, stainless steel loose tube 3 and stainless steel wire armor 4 adopt metal construction, are different from the nonmetal structure that adopts in the traditional field operations optical cable, can still keep better stability under high temperature 750 ℃, have fire-resistant, high temperature resistant advantage. The oxygen isolation layer 4 is formed by wrapping a ceramic mica tape with the thickness of 0.2-0.6 mm, the wrapping pitch is 20mm, and the ceramic mica tape has the characteristics of ablation resistance and low heat conductivity coefficient, can keep integrity in a flame environment, and prevents oxygen and heat from being transferred to the inside of the optical cable. The thickness of flame retardant coating 5 is 2.0mm ~ 5mm, adopts ceramic polyolefin, ceramic silicon rubber extrusion molding to form and is located outermost oversheath structure, and under the flame environment, flame retardant coating 5 can not burn, can form hard armor casing under high temperature, and the coefficient of thermal conductivity is low, the specific heat capacity is big, can slow down the inside transmission of temperature heat, has the characteristics of not delaying burning, not drippage, not shedding, has guaranteed the circuit integrality of field operations optical cable under flame.

The manufacturing method of the fire-resistant field optical cable comprises the following steps: firstly, paying off a single or a plurality of quartz cable cores 1 coated with a cable core coating 2 by a pay-off rack and then entering a numerical control tube making machine; a layer of stainless steel loose tube 3 is manufactured outside a single or a plurality of quartz cable cores 1 through a laser welding process, the wall thickness of the loose tube is controlled to be 0.15 mm-0.3 mm, the extra length of the cable cores is controlled through drawing a stainless steel tube, the drawing force is controlled to be 5N-10N, and the extra length of optical fibers is controlled to be 1-3 per thousand; the stainless steel armor layer 4 is manufactured by twisting steel wires outside the stainless steel loose tube 3, the pitch of the twisted steel wires is controlled to be 30-60 mm, the paying-off tension of the twisted steel wires is controlled to be 10-15N, the stainless steel armor layer 4 can resist external mechanical strength impact, pressure, vibration and the like, and the mechanical strength cannot be reduced at high temperature. The steel wire stranding is carried out outside the stainless steel armor layer 4, the oxygen insulation layer 5 is manufactured by adopting SZ two-layer wrapping, the wrapping tension of the SZ two-layer wrapping is controlled to be 1.5N-2N, and the wrapping lap joint rate is controlled to be 50%. And extruding a fire-resistant layer 6 outside the oxygen-isolating layer 5, wherein the fire-resistant layer is made of ceramic polyolefin or ceramic silicon rubber, the extrusion temperature is set to be 150-220 ℃, and the cooling mode can be gradual gradient cooling. The wall thickness of the fire-resistant layer 6 is controlled to be 2.0-5 mm, the material of the fire-resistant layer 6 is subjected to ceramic treatment under the condition of fire combustion to form a firm ceramic shell, and the ceramic shell has extremely low heat conductivity coefficient and large specific heat capacity, so that the transmission of temperature to the inside of the cable core can be effectively isolated.

The fire-resistant field optical cable adopts double protection of the stainless steel loose tube 3 and the stainless steel wire armor layer 4, can bear a 750 ℃ combustion environment, has a more stable structure, has better mechanical properties while ensuring normal communication of optical signals, and meets the mechanical property requirements of mechanical impact, tension, pressure and the like in a field scene. The utility model adopts the oxygen isolation layer 5 and the fire-resistant layer 6 as fire-resistant design, thereby avoiding the problem that the traditional field operation optical cable can not survive in the flame environment and effectively providing the circuit integrity in the flame.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. The fire-resistant field optical cable is characterized by comprising a cable core layer, wherein the cable core layer comprises a single or a plurality of quartz cable cores (1), and the outer wall of each quartz cable core (1) is provided with a cable core coating (2); the outer wall of the cable core layer is coated with a stainless steel loose tube (3), the outer diameter of the stainless steel loose tube (3) is 1.8-2.3 mm, and the wall thickness is 0.15-0.3 mm; the stainless steel armor layer (4) is coated on the outer wall of the stainless steel loose tube (3), the stainless steel armor layer (4) comprises a plurality of stainless steel wires which are twisted with each other, the outer diameter of each stainless steel wire is 0.5-0.9 mm, and the twisting pitch is 30-60 mm; the outer wall of the stainless steel armor layer (4) is wrapped with an oxygen-isolating layer (5), and the thickness of the oxygen-isolating layer (5) is 0.2-0.6 mm; the outer wall of the oxygen isolation layer (5) is wrapped with a fire-resistant layer (6), and the thickness of the fire-resistant layer (6) is 2.0-5 mm.

2. Fire-resistant field optical cable according to claim 1, characterized in that the cable core coating (2) is any of gold-, copper-or aluminium-plated.

3. The fire-resistant field optical cable according to claim 2, wherein the oxygen barrier layer (5) is made of any one of a ceramic mica tape, a gold mica tape, a composite mica tape or a synthetic mica tape.

4. Fire-resistant field optical cable according to claim 3, characterized in that the fire-resistant layer (6) is any one of ceramic ring polyolefin, ceramic silicone rubber.