CN-224232396-U - Symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable

CN224232396UCN 224232396 UCN224232396 UCN 224232396UCN-224232396-U

Abstract

The utility model provides a compound early warning cable of symmetrical distributed neutral core temperature sensing optic fibre, relates to compound cable technical field, and it includes the casing to be located three looks sinle silk and three neutral core in the casing, and three looks sinle silk is around the axis of the compound early warning cable of symmetrical distributed neutral core temperature sensing optic fibre setting, surrounds into central region, is provided with temperature sensing optic fibre in the central region. The electric field distribution of the cable is optimized by uniformly dividing the central wire core into three parts and utilizing the layout of 3+3, so that the electric field is more uniform, and the internal electromagnetic interference is reduced. Meanwhile, the symmetrical distributed neutral wire core temperature sensing optical fiber composite early warning cable can realize full-line continuous monitoring by embedding the temperature sensing optical fiber in the cable, and the real-time performance and accuracy of monitoring are improved.

Inventors

YU XIAOFU
WANG FEI
NING GONGKUO
LU XINGHUA
WANG SHANSHAN
HUANG SIZHENG

Assignees

昆明电缆集团昆电工电缆有限公司

Dates

Publication Date: 20260512
Application Date: 20250430

Claims (9)

1. The symmetrical distributed neutral wire core temperature sensing optical fiber composite early warning cable is characterized by comprising a shell, three phase wire cores and three neutral wire cores, wherein the three phase wire cores and the three neutral wire cores are positioned in the shell, the three phase wire cores are arranged around the axis of the symmetrical distributed neutral wire core temperature sensing optical fiber composite early warning cable and surround to form a central area, temperature sensing optical fibers are arranged in the central area, three edge areas are formed between the three phase wire cores and the shell, and the three neutral wire cores are respectively positioned in the three edge areas.
2. The symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable according to claim 1, wherein the temperature sensing optical fiber is sleeved with a stainless steel micro tube, the outer diameter of the stainless steel micro tube is 1.5-2 mm, and the wall thickness is 0.2-0.5 mm.
3. The symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable according to claim 2, wherein a water blocking material is filled between the temperature sensing optical fiber and the phase wire core.
4. The symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable according to claim 3, wherein the temperature sensing optical fiber is provided with a redundant length of 0.1% -0.3% of the total length of the symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable.
5. The symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable according to claim 4, wherein the bending radius of the temperature sensing optical fiber in the stainless steel microtube is not less than 40mm.
6. The symmetrical distributed type neutral wire core temperature sensing optical fiber composite early warning cable according to claim 5 is characterized in that the phase wire core comprises a phase wire conductor and a first insulating layer sleeved outside the phase wire conductor, the cross section area of the phase wire conductor is 70-300 mm 2 , and the thickness of the first insulating layer is 3-5 mm.
7. The symmetrical distributed type neutral wire core temperature sensing optical fiber composite early warning cable according to claim 6 is characterized in that the neutral wire core comprises a neutral wire conductor and a second insulating layer sleeved outside the neutral wire conductor, the sectional area of the neutral wire conductor is 1/3 of that of the phase wire conductor, and the thickness of the second insulating layer is 1.5-3 mm.
8. The symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable according to claim 7, wherein the phase conductor and the neutral conductor are formed by stranding copper monofilaments with diameters of 1.25-1.35 mm, and the stranding pitch ratio is 12-16D.
9. The symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable of claim 8, wherein the housing comprises an inner liner layer, an armor layer and an outer jacket layer from inside to outside, and the edge area is filled with filler.

Description

Symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable Technical Field The utility model relates to the technical field of composite cables, in particular to a symmetrical distributed neutral wire core temperature sensing optical fiber composite early warning cable. Background In the use process of the cable, as the temperature of the cable is increased due to the fact that current passes through the conductor, the temperature of the cable is in a controllable range under normal conditions, if a line abnormality occurs, the temperature is increased rapidly, equipment is destroyed if the line abnormality occurs, and safety accidents are caused if the line abnormality occurs, so that the monitoring and early warning of the temperature of the cable are very important. In the prior art, the measurement is usually performed by adopting a sensor, a thermal imager and other modes, and the measurement modes belong to point distributed measurement, can be effectively measured in a device installation area, and cannot be monitored in real time when the device installation area is outside. Meanwhile, the measurement modes belong to external measurement, and besides being influenced by the temperature of a cable, the measurement modes are also interfered by the temperature of the environment, so that the accuracy is reduced. Disclosure of utility model The utility model aims to provide a symmetrical distributed neutral wire core temperature sensing optical fiber composite early warning cable which is novel in structure, can realize full-line continuous monitoring and improves the real-time performance and accuracy of monitoring. Embodiments of the present utility model are implemented as follows: The symmetrical distributed neutral wire core temperature sensing optical fiber composite early warning cable comprises a shell, three phase wire cores and three neutral wire cores, wherein the three phase wire cores and the three neutral wire cores are positioned in the shell, the three phase wire cores are arranged around the axis of the symmetrical distributed neutral wire core temperature sensing optical fiber composite early warning cable to form a central area in a surrounding mode, temperature sensing optical fibers are arranged in the central area, three edge areas are formed between the three phase wire cores and the shell, and the three neutral wire cores are respectively positioned in the three edge areas. Further, in other preferred embodiments of the present utility model, the temperature sensing optical fiber is sleeved with a stainless steel micro-tube, the outer diameter of the stainless steel micro-tube is 1.5-2 mm, and the wall thickness is 0.2-0.5 mm. Further, in other preferred embodiments of the present utility model, a water blocking material is filled between the temperature sensing optical fiber and the phase core. Further, in other preferred embodiments of the present utility model, the temperature sensing optical fiber is provided with a redundant length of 0.1% -0.3% of the total length of the symmetrical distributed neutral core temperature sensing optical fiber composite early warning cable. Further, in other preferred embodiments of the present utility model, the bend radius of the temperature sensing optical fiber in the stainless steel micro-tube is not less than 40 mm. Further, in other preferred embodiments of the present utility model, the phase conductor includes a phase conductor and a first insulating layer sleeved outside the phase conductor, the cross-sectional area of the phase conductor is 70-300 mm 2, and the thickness of the first insulating layer is 3-5 mm. Further, in other preferred embodiments of the present utility model, the neutral wire core includes a neutral conductor and a second insulation layer sleeved outside the neutral conductor, the cross-sectional area of the neutral conductor is 1/3 of that of the phase conductor, and the thickness of the second insulation layer is 1.5-3 mm. Further, in other preferred embodiments of the present utility model, the phase conductor and the neutral conductor are formed by twisting copper monofilaments having a diameter of 1.25-1.35 mm, and the twisting pitch ratio is 12-16 d. Further, in other preferred embodiments of the present utility model, the housing includes an inner liner, an armor layer, and an outer jacket layer from inside to outside, and the edge region is filled with a filler. The embodiment of the utility model has the beneficial effects that: The embodiment of the utility model provides a symmetrical distributed neutral wire core temperature sensing optical fiber composite early warning cable which comprises a shell, three phase wire cores and three neutral wire cores, wherein the three phase wire cores are positioned in the shell, the three phase wire cores are arranged around the axis of the symmetrical distributed neutral wire core temperature sensing optical fiber composi