US 2026/0299246 A1Published application

Air-blowing optical cable

AssigneeJiangsu Zhongtian Technology Co., Ltd.

InventorsPengyu ZHU, Xiaoming MIAO, Weiwei MIAO, Yingying MIAO, Xu YOU, Jingtao LIN, Yanhao CHEN

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Abstract

An air-blowing optical cable, includes a cable core and an outer sheath coated on the outside of the cable core. A protruding strip is provided on an outer wall of the outer sheath, and a height direction of the protruding strip extends outward along a radial direction of the optical cable, and the protruding strip has a length direction extending along an axial direction of the air-blowing optical cable and spirally surrounds an outer surface of the outer sheath. Gas advances along a spiral direction of the protruding strip, generating a thrust component on the optical cable along the axial direction; and a propelling force Ff that is generated by the thrust component to propel each meter of optical cable to move is greater than 50N. The protruding strip is provided on the outer side of the outer sheath, reducing friction during the laying of optical cable and external conduits.

Claims10

Dependent claims

An air-blowing optical cable, comprising a cable core and an outer sheath coated on an outside of the cable core, wherein a protruding strip is provided on an outer wall of the outer sheath;

a height direction of the protruding strip extends outward along a radial direction of the optical cable;
the protruding strip has a length direction extending along an axial direction of the air-blowing optical cable and spirally surrounds an outer surface of the outer sheath, gas advances along a spiral direction of the protruding strip, generating a thrust component on the optical cable in the axial direction;
and a propelling force Ff that is generated by the thrust component to propel each meter of optical cable to move is greater than 50N, and a calculation formula for the propelling force Ff is:
F
f
=
S
·
μ
⁡
(
θ
)
·
P
P
·
h
;
wherein:
S
=
(
2
⁢
π
⁢
r
)
2
p
2
+
1
·
L
;
⁢
μ
⁡
(
θ
)
=
μ
·
sin
⁢
θ
;
⁢
θ
=
acr
⁢
tan
(
p
2
⁢
π
⁢
r
)
;
Ff is a radial propelling force exerted on the optical cable during an air-blowing process;
S is a total length of the protruding strip when a starting point of the protruding strip is unfolded along a circumference direction of the optical cable;
μ(θ) is a composite friction coefficient;
r is a radius of the optical cable sheath;
p is a pitch;
L is a total length of the optical cable;
θ is an acute angle between a spiral protruding strip and the axial direction of the optical cable;
PP is an internal pressure within conduit under a given air-blowing device and conduit;
and
h is a height of the protruding strip.

72 more elements

Dependencies are inferred from the claim text.