CN203055503U

CN203055503U - Bending-resistant floating single-shielding coaxial cable

Info

Publication number: CN203055503U
Application number: CN 201320003015
Authority: CN
Inventors: 王吉斌; 宋守清; 王大明
Original assignee: LIAONING JINHUAN CABLE CO Ltd
Current assignee: LIAONING JINHUAN CABLE CO Ltd
Priority date: 2013-01-05
Filing date: 2013-01-05
Publication date: 2013-07-10
Anticipated expiration: 2023-01-05

Abstract

The utility model discloses a bending-resistant floating single-shielding coaxial cable, aiming to solve the problem of small bending-resistant fatigue limit of offshore floating cables. An inner conductor is arranged in the center of the cable, an insulating layer is arranged outside the inner conductor, an outer conductor is arranged outside the insulating layer, an outer sheath is arranged outside the outer conductor, a strength member is arranged outside the outer sheath, an outer skinning is arranged outside the strength member, and a foam skin is arranged outside the outer skinning; and the strength member is made of aramid fiber. The bending-resistant floating single-shielding coaxial cable improves the bending strength of the foam skin and improves the bending strength of the by utilizing the strength member made of aramid fiber.

Description

The floating single screened coaxial cable of a kind of bending resistance

Technical field

The utility model belongs to field of cables, is specially a kind of marine with the floating single screened coaxial cable of bending resistance.

Background technology

For floating screened coaxial cable, along with the fluctuation up and down of seawater, the bending strength that cable bears and fatigue limit should be higher than common shielded type cable far away.Present floating shielded type cable generally comprises inner wire, insulating barrier, outer conductor and plays the foaming body of floating effect, and the character of foaming body itself has brought bending resistance bad, can not adapt to the frequent bending that seawater fluctuates and brings, thereby cause fractureing of cable conductor.

The utility model content

It is a kind of marine with the floating single screened coaxial cable of bending resistance that the purpose of this utility model is to provide, the bending resistance that the existing floating shielded type cable of solution at sea uses is bad, can not adapt to the frequent bending that seawater fluctuates and brings, thereby cause problems such as fractureing of cable conductor.

The technical solution of the utility model is:

The floating single screened coaxial cable of a kind of bending resistance is inner wire at the center of cable, and described inner wire is outward insulating barrier, described insulating barrier is outward outer conductor, and described outer conductor is outward oversheath, and described oversheath is outward strength member, described strength member is outer skinning outward, and described outer skinning is the foaming skin outward.

Described strength member material is aramid fiber.

The beneficial effects of the utility model are:

The utility model has increased strength member, and described strength member material adopts aramid fiber (PPTA Aramid fiber).Utilize strength member to improve the overall bending strength of foaming skin and cable, improved bending fatigue limit.According to test, cable performance of the present utility model is as follows:

1. cable intensity

1.1 stretch breaking strength 〉=9kN

1.2 shear strength: oversheath, aramid fiber strength member, outer skinning, foaming layer between any two＞1000N/m; Between other object 〉=150N/30cm.

2. bending property: bending radius is not more than 165mm.

3. density: 800 ± 50kg/m3, after the watertight test, density is no more than 850kg/m3.

4 watertightnesses: kept 2 hours under 4.4MPa hydraulic pressure, cable is laterally water-tight, and aramid layers is vertically water-tight with interior (not containing aramid layers).

5. cable properties impedance 50 ± 2.5 Ω (f=10MHz).

6. attenuation constant＜0.06dB/m(f=30MHz).

7. outer conductor D.C. resistance≤23.0 Ω/km.

Core and the shielding between insulation resistance＞10000M Ω km.

9. proof voltage intensity: should satisfy exchanging 50Hz between conductor and the shielding, 1kV, 1min does not puncture.

10. environmental suitability: working temperature :-35 ℃ ^-+ 65 ℃; Storage temperature :-50 ℃ ^-+ 70 ℃.

Description of drawings

Figure l is the utility model structure chart;

Among the figure, 1-inner wire, 2-insulating barrier, 3-outer conductor, 4-oversheath, 5-aramid fiber strength member,

6-outer skinning, 7-foaming skin.

Embodiment

As shown in Figure 1, the floating single screened coaxial cable of the utility model bending resistance, be inner wire 1 at the center of cable, be insulating barrier 2 outside the described inner wire 1, being outer conductor 3 outside the described insulating barrier 2, is oversheath 4 outside the described outer conductor 3, is strength member 5 outside the described oversheath 4, be outer skinning 6 outside the described aramid fiber strength member 5, be foaming skin 7 outside the described outer skinning 6.

Described strength member 5 materials are aramid fiber.

Claims

1. floating single screened coaxial cable of bending resistance, it is characterized in that: be inner wire at the center of cable, described inner wire is outward insulating barrier, described insulating barrier is outward outer conductor, described outer conductor is outward oversheath, described oversheath is outward strength member, and described strength member is outer skinning outward, and described outer skinning is the foaming skin outward.

2. cable according to claim 1, it is characterized in that: described strength member material is aramid fiber.