CN-122018087-A - Sensing optical fiber splicing process suitable for optical fiber winding structure

CN122018087ACN 122018087 ACN122018087 ACN 122018087ACN-122018087-A

Abstract

The invention discloses a sensing optical fiber splicing process suitable for an optical fiber winding structure, which comprises the following steps of changing winding pitch, slotting, welding and fixing, gradually increasing pitch to form a loose transition section of a sensing optical fiber when the central position of a planned splicing area is about to be reached in the process of winding the sensing optical fiber on the surface of a sensitization layer of a cable core, slotting the surface of the sensitization layer on the planned splicing area of the cable core to form a splicing slot, sleeving a heat shrinkage tube on the end part of the sensing optical fiber, and then carrying out end fusion with another sensing optical fiber needing to be spliced, wherein the sensing optical fiber is respectively fixed in a punctiform manner at the starting end and the terminating end of the splicing slot through an adhesive, so that the splicing of the sensing optical fiber is realized, the reliability of a splicing point is improved, the welding loss is reduced, and the continuous manufacturing of an ultra-long communication perception integrated submarine cable is satisfied.

Inventors

SHEN WEIWEI
WANG LIQIU
YU WENHUI
WANG YUE
HE LULIANG
YUE ZHIJIE
XU RENDONG
MA SHAOBO
XU PING
XU ZONGXIAN
Ma Tingwang
YING ZIXIANG

Assignees

江苏亨通华海科技股份有限公司
中国船舶集团有限公司第七一五研究所
浙江智强东海发展研究院有限公司
浙江亨通智声科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260211

Claims (10)

1. The sensing optical fiber splicing process suitable for the optical fiber winding structure is characterized by comprising the following steps of: S01, changing winding pitch: Setting the working pitch of winding as P1 in the process of winding the sensing optical fiber (2) on the surface of the sensitization layer of the cable core (1), gradually increasing the pitch when the central position of a planned splicing region is about to be reached, and setting the pitch of the wound splicing region as P2, wherein P2 is larger than P1; s02, grooving: Grooving the surface of the sensitization layer on a planned splicing region of the cable core (1) to form a splicing groove (4), chamfering the starting end and the ending end of the splicing groove (4) to manufacture a gentle slope region; s03, welding: Taking out the sensing optical fiber (2) from the winding path, sleeving a heat shrinkage tube (3) on the end part, and then carrying out end fusion connection with another sensing optical fiber needing to be connected; pushing the heat shrinkage tube (3) to a welding area for heat shrinkage treatment; s04, fixing: The heat shrinkage tube (3) is arranged in the connecting groove (4), and the sensing optical fibers (2) at the two ends of the heat shrinkage tube (3) are distributed in a sine wave manner in the connecting groove (4); The sensing optical fiber (2) is fixed in a punctiform manner at the starting end and the ending end of the connecting groove (4) through an adhesive.
2. The sensing optical fiber splicing process suitable for the optical fiber winding structure according to claim 1, wherein the working pitch P1 is 20 mm-60 mm in value range, and the splicing region pitch P2 is 150 mm-250 mm in value range.
3. The sensing fiber splicing process for optical fiber winding structure according to claim 1, wherein in step S01, the monitoring of the winding length of the sensing fiber (2) is performed by a meter.
4. The sensing optical fiber splicing process suitable for the optical fiber winding structure according to claim 1, wherein in the step S02, a numerical control thermal cutting machine is adopted for slotting, and the temperature of a cutting tool bit of the numerical control thermal cutting machine is controlled to be 200-300 ℃.
5. The process for splicing sensing optical fibers suitable for optical fiber winding structures according to claim 1, characterized in that said splicing groove (4) adopts a fusiform structure.
6. The sensing optical fiber splicing process suitable for the optical fiber winding structure according to claim 1, wherein the length of the heat shrinkage tube (3) is 40mm, and the sensing optical fiber (2) and the heat shrinkage tube (3) are preliminarily bonded by using shadowless glue before heat shrinkage.
7. The process for splicing sensing optical fibers suitable for use in an optical fiber winding structure according to claim 1, wherein said adhesive is a hot melt adhesive.
8. The sensing fiber splicing process for fiber optic winding structures of claim 1, further comprising step S05, restoring the working pitch: After the connection is completed, the winding of the sensing optical fiber is continued, the pitch is gradually reduced until the pitch is restored to the working pitch P1, and normal winding is performed.
9. The process of claim 1, wherein the length of the splicing region is 1.0 to 2.0m.
10. The sensing fiber splicing process for fiber optic winding structures of claim 1, further comprising step S06, wrapping: after the sensing optical fiber (2) is wound on the surface of the sensitization layer, the outside of the sensing optical fiber (2) is wrapped by using a water blocking tape.

Description

Sensing optical fiber splicing process suitable for optical fiber winding structure Technical Field The invention relates to the field of optical cable manufacturing, in particular to a sensing optical fiber splicing process suitable for an optical fiber winding structure. Background Along with the large-scale application of the communication perception integrated submarine cable, higher requirements are put on the length of a single communication perception integrated submarine cable, and continuous manufacturing of the communication perception integrated submarine cable with the ultra-long section of tens of kilometers is required. In the continuous industrial production link of the communication sensing integrated submarine cable, the sensor optical fiber is required to be connected due to process limitation or accidental interruption. In the prior art, the patent application with publication number of CN115774303A discloses a downhole optical cable splicing method, which is used for splicing and coating communication optical fibers of inner-layer steel pipes. In the communication sensing integrated submarine cable, besides the communication optical fibers in the cable core, the sensing optical fibers are wound on the surface of the sensitization layer of the cable core, so that the difficulty of online connection is increased, and improvement is needed. Disclosure of Invention The invention mainly solves the technical problem of providing a sensing optical fiber splicing process suitable for an optical fiber winding structure, which realizes the splicing of sensing optical fibers, improves the splicing reliability and meets the continuous manufacturing of ultra-long section communication perception integrated submarine cables. In order to solve the technical problems, the invention adopts a technical scheme that a sensing optical fiber splicing process suitable for an optical fiber winding structure is provided, and comprises the following steps: S01, changing winding pitch: Setting the working pitch of winding as P1 in the process of winding the sensing optical fiber (2) on the surface of the sensitization layer of the cable core (1), gradually increasing the pitch when the central position of a planned splicing region is about to be reached, setting the pitch of the wound splicing region as P2, wherein P2 is larger than P1, and forming a relaxation transition section of the sensing optical fiber (2); s02, grooving: grooving the surface of the sensitization layer on a planned splicing area of the cable core (1) to form a splicing groove (4), chamfering the starting end and the terminating end of the splicing groove (4), and manufacturing a gentle slope area to buffer the sensing optical fiber (2) entering and exiting the splicing groove (4) so as to avoid the problem of overlarge strain; s03, welding: taking out the sensing optical fiber (2) from the winding path, sleeving a heat shrinkage tube (3) on the end part, and then carrying out end welding with another sensing optical fiber to be connected, wherein the welding loss is less than 0.1dB; pushing the heat shrinkage tube (3) to a welding area for heat shrinkage treatment; s04, fixing: The heat shrinkage tube (3) is arranged in the connecting groove (4), and the sensing optical fibers (2) at the two ends of the heat shrinkage tube (3) are distributed in a sine wave in the connecting groove (4), and the waveform design ensures that the sensing optical fibers (2) have sufficient allowance in the connecting groove (4); The sensing optical fiber (2) is fixed in a punctiform manner at the starting end and the ending end of the connecting groove (4) through an adhesive. In a preferred embodiment of the present invention, the working pitch P1 ranges from 20mm to 60mm, and the connecting region pitch P2 ranges from 150mm to 250mm. In a preferred embodiment of the present invention, in step S01, the monitoring of the wound length of the sensing fiber (2) is performed by a meter. In a preferred embodiment of the present invention, in step S02, a numerical control thermal cutting machine is used for slotting, the temperature of the cutting head of the numerical control thermal cutting machine is controlled to be 200 ℃ to 300 ℃, and the high-temperature cutting head is used for melting and removing the material on the sensitization layer to form a continuous slot (4). In a preferred embodiment of the invention, the splice tray (4) is of a shuttle-like configuration. In a preferred embodiment of the invention, the length of the heat-shrinkable tube (3) is 40mm, and the sensor optical fiber (2) and the heat-shrinkable tube (3) are preliminarily bonded by using shadowless glue before heat shrinkage. In a preferred embodiment of the invention, the adhesive is a hot melt adhesive. In a preferred embodiment of the present invention, the method further includes step S05, recovering the working pitch: After the connection is completed, the winding of the sensing optica