CN200965579Y

CN200965579Y - Directly buried all dielectric optical cable

Info

Publication number: CN200965579Y
Application number: CN 200620104651
Authority: CN
Inventors: 张万春; 祝冬军; 薄崇飞; 方伟栋
Original assignee: ZHEJIANG FUCHUNJIANG COMMUNICATION GROUP CO Ltd
Current assignee: ZHEJIANG FUCHUNJIANG COMMUNICATION GROUP CO Ltd
Priority date: 2006-06-14
Filing date: 2006-06-14
Publication date: 2007-10-24
Anticipated expiration: 2016-06-14

Abstract

The utility model relates to a full medium optical cable used for straight burying, a non metal fiberglass enhancing plastic round rod is intensively adopted in the optical cable center, and the optical cable in the beam tube is longer than the beam tube with the exceeding length of 0.6 to 1.0 thousandth; the beam tube in the optical cable core is intertwisted by the adoption of SZ, the intertwisting pitch span or the intertwisting angle is 60 to70mm/10 Pi ; a polyethylene inner jacket with the thickness of 1.0 to 1.2mm is coated on the outside of the cable core; and then a nonmetal extending resistance component fiberglass yarn is packed on the outside of the cable core, and then a polyethylene outer jacket with the thickness of 2.0mm is closely packed. The control of the exceeding length of the fiber, the cable core pitch span, the packing design, the pitch span of the packing fiberglass yarn and the jacket squeezing out technique is reasonable, thus making the optical cable run stably when the circuitry is under the high electromagnetism disturbing, the big flank press, the big stretching intensity, the high temperature and the low temperature, and making the each performance meet the requirement related to the straight burying optical cable of the standard YD/T901-2001 in the field of the communication.

Description

Buried full medium optical cable

Technical field:

The utility model relates to a kind of communications optical cable, especially relates to the invention of employed optical fiber cable for direct burials such as being applicable to highfield, anti-strong electromagnetic, national defense communication circuit.

Background technology

Be used for highfield, signal shielding requirement height, the employed optical cable direct-burying of national defense communication circuit and be laid in undergroundly, so optical cable itself should have high-tensile, lateral pressure resistant, not be subjected to characteristics such as electromagnetic interference (EMI).To being used for the employed ordinary optical cable of direct-burried line traffic, requiring has multinomial performances such as advantages of higher tensile strength, lateral pressure resistant, but is not suitable for the environment that requires direct-burried of highfield.The non-metallic optical fiber cables of prior art is deposited stretch-proof, lateral pressure resistant poor performance (not reaching the requirement of optical fiber cable for direct burial), is difficult to satisfy the mechanical property requirement of direct-burried.

Summary of the invention

The utility model provides a kind of anti-interference, the big tensile strength of direct-burried use, non-metallic optical fiber cables of lateral pressure resistant of being used for.

The utility model is achieved by the following technical solution: nonmetallic glass fiber reinforced plastics round bar is strengthened adopting in the optical cable center, and the optical fiber in the beam tube is longer than beam tube, and surplus length is 0.6-1.0 ‰; It is stranded that beam tube adopts SZ in the cable core, and twisting pitch/stranding angle is 60-70mm/10 π; It is 1.0-1.2mm tygon inner sheath that cable core coats thickness outward; The wrapped more nonmetal anti-element glass fiber yarn of opening, extruding thickness then is the tygon oversheath of 2.0mm.

As preferably, the vertical outward bag nonwoven fabrics of cable core, its thickness is 0.1-0.15mm, is preferably 0.15mm; Inner sheath thickness 1.0-1.2mm is preferably 1.2mm; Glass fiber yarn has twisting and does not twist, and is preferably the twisting glass fiber yarn; The glass fiber yarn lay of lapping is 600-800mm, is preferably 800mm.

Because optical fiber excess length, cable core pitch and band design, glass fiber yarn lay of lapping and the control of sheath expressing technique are rationally, make optical cable stable when the high electromagnetic interference (EMI) of circuit, large lateral pressure power, big pulling strengrth, high temperature and low temperature, every performance satisfies communication industry standard YD/T901-2001 about the requirement of direct-burried with optical cable.

Description of drawings:

Fig. 1 is the schematic cross-section of buried full medium optical cable.

Embodiment:

Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is further described in detail.

This figure sequence number: 1-optical fiber, 2-PBT beam tube, the fine cream of 3-, 4-cable cream, 5-nonwoven fabrics band, 6-tygon inner sheath, 7-gasket for packing, 8-central reinforce member (FRP), 9-glass fiber yarn, 10-tygon oversheath.

Embodiment: as shown in Figure 1, cable core adopts 1+6 structure 30 cores, promptly by 5 beam tubes 2 (6 core/pipe)+1 gasket for packing 7 and central reinforce member 8, the present embodiment central reinforce member is FRP (a glass fiber reinforced plastics round bar), the elastic modulus 50GPa of FRP, diameter 2.1mm, hold 6 optical fiber 1 in the every beam tube, the surplus length of beam tube inner fiber is 0.6-1.0 ‰, beam tube takes SZ stranded in the cable core, twisting pitch/stranding angle is 60-70mm/10 π, and glass fiber yarn 9 is as the outer wrapped anti-element of opening of cable core.The utility model adopts little twisting pitch simultaneously because excess fiber length is reasonable, and optical cable is required and during high cold operation, every performance is normal in harsh mechanical propertys such as the big tensile strength of direct-burried environment; The vertical outward bag thickness of cable core is 0.15mm nonwoven fabrics band, 1.2mm thick inner sheath, and wrapped nonmetal reinforcing element twisting glass fiber yarn and oversheath are extruded simultaneously and are finished, per share glass fiber yarn is emitted tension force and is consistent, wrapping angle is reasonable, even along the inner sheath surface distributed, and extruding thickness then is the tygon oversheath of 2.0mm.Guaranteed optical cable under certain external force, the cable core of optical cable is not subjected to uneven wall pressure and tensile force, and nonmetal anti-element, the rational structure of opening of high-quality makes optical cable satisfy the needs of standard to tensile resistence, lateral pressure resistant power.Simultaneously, the optical cable manufacturing cost is lower; Remedy ordinary straight buried fiber optic cable anti-electromagnetic interference force ability, be not suitable for the defective of highfield environment.Invented the novel optical cable that can resist electromagnetic interference (EMI) to be applicable to direct-burried again.

Claims

1. a buried full medium optical cable has nonmetal central reinforce member, cable core, optical fiber bundle tubes, wrapped nonmetal reinforcing element and oversheath, it is characterized in that:

A. the optical fiber in the beam tube is longer than beam tube, and surplus length is 0.6-1.0 ‰;

B. it is stranded that beam tube forms SZ, and twisting pitch/stranding angle is 60-70mm/10 π;

C. thickness is the 1.0mm-1.2mm inner sheath.

2, a kind of buried full medium optical cable as claimed in claim 1 is characterized in that:

A. between cable core and the wrapped nonmetal reinforcing element thickness 1.0mm-1.2mm inner sheath is arranged;

B. wrapped nonmetal reinforcing element twisting, lay of lapping is 600-800mm.