CN214252675U

CN214252675U - Four-corner symmetrical full-dry type leading-in optical cable

Info

Publication number: CN214252675U
Application number: CN202120406748.7U
Authority: CN
Inventors: 张剑锋; 袁福; 艾阳春
Original assignee: Zhejiang Wanma Tianyi Communication Wire & Cable Co ltd
Current assignee: Zhejiang Wanma Tianyi Communication Wire & Cable Co ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-09-21
Anticipated expiration: 2031-02-24

Abstract

The utility model relates to an optical cable field of making. The purpose is to provide a four-corner symmetrical full-dry type leading-in optical cable, which has the characteristics of difficult damage and long service life in the construction wiring process. The technical scheme is as follows: a four-corner symmetrical full-dry type leading-in optical cable comprises a main cable; the method is characterized in that: the leading-in optical cable also comprises four suspension wires which are distributed at four corners of the main cable and are respectively connected with the main cable through suspension belts; the main cable comprises a PBT loose tube, an outer sheath which is coated outside the PBT loose tube and is integrally formed with the hanging strip, and a plurality of optical fibers and a plurality of water-blocking yarns which are arranged in the PBT loose tube; the suspension wire comprises a steel strand and a sheath which is coated outside the steel strand and is integrally formed with the suspension belt. Four suspension wires are adopted, the main cable which needs to be protected most is arranged in the geometric center of the optical cable, and the main cable can be prevented from being damaged easily in construction.

Description

Four-corner symmetrical full-dry type leading-in optical cable

Technical Field

The utility model relates to an optical cable field of making, concretely relates to full dry-type optical cable of introducing of four corners symmetry type.

Background

In recent years, optical fiber users have begun to increase greatly with the widespread use of optical cables in the internet, cable television networks, and the like. However, in the fiber-to-the-home construction line, the overhead lead-in section is in an open space, and the surrounding environment is complex and variable, so that the requirement on the environment resistance of the optical cable is high. A conventional leading-in section mostly adopts a self-supporting butterfly leading-in optical cable, and the communication function is lost due to the fact that a main cable is easily broken and separated from a dropped line, the optical cable is bent and the like caused by the corrosion of a complex environment all year round.

Under the circumstances, a self-supporting lead-in optical cable which is convenient to construct, excellent in environmental resistance and firm in structure is urgently needed in the market so as to meet various using requirements of the market and users.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of above-mentioned background art, provide a full dry-type optical cable of introducing of four corners symmetry type, this optical cable should have not fragile, long service life's characteristics among the construction wiring process.

The utility model provides a technical scheme is: a four-corner symmetrical full-dry type leading-in optical cable comprises a main cable; the method is characterized in that: the leading-in optical cable also comprises four suspension wires which are distributed at four corners of the main cable and are respectively connected with the main cable through suspension belts; the main cable comprises a PBT loose tube, an outer sheath which is coated outside the PBT loose tube and is integrally formed with the hanging strip, and a plurality of optical fibers and a plurality of water-blocking yarns which are arranged in the PBT loose tube; the suspension wire comprises a steel strand and a sheath which is coated outside the steel strand and is integrally formed with the suspension belt. Four suspension wires are adopted, the main cable which needs to be protected most is arranged in the geometric center of the optical cable, and the main cable can be prevented from being damaged easily in construction.

The four suspension wires are galvanized steel strands with the outer diameter phi of 1.0mm, and the outer diameter of the sheath is phi 2.0 mm.

Further, the external diameter of the PBT loose tube is 1.8 mm, and the external diameter of the outer sheath is 3.0 mm.

The utility model has the advantages that: the optical cable is more environment-friendly compared with the conventional optical cable because the optical cable adopts the water-blocking yarn to block water; the loose-sleeve structure is adopted, so that the G652D optical fiber can be adopted, the performance of the optical fiber is ensured to be more excellent, and the cost is reduced. In addition, due to the adoption of the structure with symmetrical four corners, one suspension wire plays a role in bearing and lifting in the use process, and the other three suspension wires play a role in supporting, so that the stress of the optical cable at the suspension strap can be effectively reduced, the problem of optical cable damage caused by corrosion of the environment after the optical cable is laid is thoroughly solved, and the service life is obviously prolonged.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments shown in the drawings.

Fig. 1 shows a four-corner symmetric all-dry type drop cable, wherein a main cable includes a PBT (polybutylene terephthalate) loose tube, an outer sheath is wrapped outside the PBT loose tube, and a plurality of optical fibers and a plurality of water-blocking yarns are arranged in the PBT loose tube; the optical fibers and the water-blocking yarns extend in the PBT loose tube along the length direction of the main cable.

The PBT loose tube is positioned at the center, four suspension wires are symmetrically arranged at four corners of the PBT loose tube, and therefore a main cable which needs to be protected most is placed at the geometric center of the optical cable; each suspension wire comprises a steel strand and a sheath coated outside the steel strand, and the sheath is also connected with the outer sheath through a suspension belt; and the sheaths, the hanging strips and the outer sheaths of the four hanging wires are integrally formed by injection molding.

Preferably, the four suspension wires are galvanized steel strands with the outer diameter phi of 1.0mm, and the outer diameter of the sheath is phi 2.0 mm.

More preferably, the PBT loose tube has an outer diameter of 1.8 mm, and the outer diameter of the outer sheath at the center is 3.0 mm.

Obviously, the above description is only a few embodiments of the present invention; for those skilled in the art, variations can be made in the specific embodiments and applications without departing from the spirit and scope of the embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Claims

1. A four-corner symmetrical full-dry type leading-in optical cable comprises a main cable; the method is characterized in that: the leading-in optical cable also comprises four suspension wires which are distributed at four corners of the main cable and are respectively connected with the main cable through suspension belts; the main cable comprises a PBT loose tube, an outer sheath which is coated outside the PBT loose tube and is integrally formed with the hanging strip, and a plurality of optical fibers and a plurality of water-blocking yarns which are arranged in the PBT loose tube; the suspension wire comprises a steel strand and a sheath which is coated outside the steel strand and is integrally formed with the suspension belt.

2. The quad-symmetric all-dry drop cable of claim 1, wherein: the four suspension wires are galvanized steel strands with the outer diameter phi of 1.0mm, and the outer diameter of the sheath is phi 2.0 mm.

3. The quad-symmetric all-dry drop cable of claim 2, wherein: the external diameter of the PBT loose tube is 1.8 mm, and the external diameter of the outer sheath is 3.0 mm.