CN112578516B - Super-flexible optical cable and processing method - Google Patents
Super-flexible optical cable and processing method Download PDFInfo
- Publication number
- CN112578516B CN112578516B CN202011490020.3A CN202011490020A CN112578516B CN 112578516 B CN112578516 B CN 112578516B CN 202011490020 A CN202011490020 A CN 202011490020A CN 112578516 B CN112578516 B CN 112578516B
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- Prior art keywords
- optical cable
- crawler
- crawler belt
- grooves
- optical
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
Abstract
The invention discloses an ultra-flexible optical cable and a processing method thereof. The periodic circular grooves are distributed on the sheath structure of the optical cable, so that the bending space is effectively increased, the generation of bending stress is avoided, and 360-degree super-flexible bending under the bending radius which is 5 times of the cable diameter can be realized. The optical cable can be well suitable for laying cables in narrow and complex spaces.
Description
The technical field is as follows:
the invention relates to an ultra-flexible optical cable and a processing method thereof.
Background art:
with the development and popularization of optical communication, optical fiber communication technology is used in various signal transmission occasions. When using under narrow and small space, the complex environment, the optical cable often can bear the crooked of multi-angle, minor radius, reciprocity, to ordinary optical cable, this kind of crooked can produce great extrusion and bending stress, produces negative influence to optical fiber transmission, produces great puzzlement to the optical cable wiring.
The invention provides an ultra-flexible optical cable and a processing method thereof, which can be well suitable for laying cables in narrow and complex spaces.
The invention content is as follows:
the invention provides an ultra-flexible optical cable and a processing method thereof to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: an ultra-flexible optical cable comprises optical fibers, a tight sleeve layer, tensile yarns and an outer protective layer, wherein the optical fibers, the tight sleeve layer, the tensile yarns and the outer protective layer are arranged from inside to outside, and circular grooves are uniformly arranged on the outer protective layer at intervals.
Further, the depth of the circular groove is 0.5mm-1.0mm.
Further, the tensile yarn is aramid yarn.
Further, the outer jacket is a low-smoke halogen-free sheath or a PVC sheath.
The invention also provides a processing method of the super-flexible optical cable, which comprises the steps of simultaneously releasing the tensile yarns and the optical fibers sleeved with the tight sleeve layers from the optical fiber pay-off rack, collecting the optical fibers and the optical fibers into an extrusion molding machine, processing the outer protective layer in the extrusion molding machine through an extrusion molding process, and forming the optical cable with a smooth circumferential surface; and the optical cable is extruded in the forming crawler belt after coming out of the extruding machine, round grooves are uniformly arranged on the circumferential surface of the optical cable at intervals, the optical cable extruded and formed by the forming crawler belt sequentially passes through a hot water tank and a cold water tank for cooling and shaping, the optical cable is emited by a tractor after being cooled and shaped, and a take-up reel is wound on a take-up machine, so that an optical cable product is finally formed.
Further, the forming crawler comprises an upper crawler, a lower crawler and crawler wheels, the upper crawler and the lower crawler are respectively and correspondingly wound on the crawler wheels, and the upper crawler and the lower crawler are vertically layered and attached to each other; the outer circumferential surfaces of the upper crawler and the lower crawler are provided with crawler grooves, a plurality of semicircular bulges are arranged in the crawler grooves at intervals, and after the upper crawler and the lower crawler are mutually attached, each semicircular bulge on the upper crawler is mutually attached with the corresponding semicircular bulge on the lower crawler to form a whole circle.
Further, the bottom surface of the track groove is arc-shaped.
Further, the crawler wheels on the upper crawler and the lower crawler are linked with the tractor.
The invention has the following beneficial effects:
the periodic circular grooves are distributed on the sheath structure of the optical cable, so that the bending space is effectively increased, the generation of bending stress is avoided, and 360-degree super-flexible bending under the bending radius which is 5 times of the cable diameter can be realized. The optical cable can be well suitable for laying cables in narrow and complex spaces.
The super-flexibility characteristic of the optical cable is realized without adding specific materials through the circular grooves which are distributed at intervals in the axial direction of the protective layer structure, and the grooves enable the optical cable to have sufficient space when being bent so as to avoid the optical cable from being extruded;
for the production of the optical cable sheath, the production can be realized by additionally arranging the specific forming crawler on the existing common sheath production equipment, the cost is lower, and the realization is easy.
Description of the drawings:
fig. 1 is a structural view of an ultra-flexible optical cable according to the present invention.
Fig. 2 is a diagram of an apparatus for processing an ultra-flexible optical cable.
Fig. 3, 4 and 5 are structural views of the molding crawler of the present invention.
Figure 6 is a cross-sectional view of a profiled track in accordance with the present invention.
In the figure: 11-an optical fiber; 12-a tight-buffered layer; 13-a tensile yarn; 14-an outer sheath; 15-circular grooves; 21-a pay-off rack, 23-a plastic extruding machine, 25-a hot water tank, 26-a cold water tank and 27-a traction machine; 28-a take-up machine; 3-forming caterpillar, 31, upper caterpillar; 32. a lower crawler belt; 33. a track groove; 34. a semicircular bulge.
The specific implementation mode is as follows:
the invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, an ultra-flexible optical cable according to the present invention includes optical fibers 11, a tight-buffered layer 12, tensile yarns 13, and an outer sheath 14, in which circular grooves 15 are uniformly formed in the outer sheath 14 with a certain gap therebetween.
The tensile yarn 13 in the invention adopts aramid yarn, and the outer protective layer 14 is a low-smoke halogen-free protective layer or a PVC protective layer.
The sheath is axially spaced with circular grooves 15, the depth of the circular grooves 15 is 0.5mm-1.0mm. The circular groove 15 is used for releasing mutual extrusion of the optical cable in the axial direction in the bending process, 360-degree super-flexible bending can be achieved under the bending radius which is 5 times of the cable diameter, and the protective layer cannot be damaged completely.
Referring to fig. 2, the ultra-flexible optical cable according to the present invention is manufactured by simultaneously drawing the tensile yarns 13 and the optical fibers 11 covered with the tight-buffered layer 12 from the optical fiber pay-off reel 21, uniformly winding the tensile yarns 13 around the tight-buffered optical fibers 2, and then collecting the yarns to the front end of the extruder 23, and processing the outer sheath 14 by an extrusion process in the extruder to form the optical cable having a smooth circumferential wall. The optical cable enters the forming crawler 10 to be extruded after coming out of the extruding machine, a round groove 15 is formed in the surface of the outer sheath 14 in the optical cable, the optical cable coming out of the forming crawler 10 sequentially passes through a hot water tank 25 and a cold water tank 26 to be cooled and shaped, the optical cable is emissioned through a tractor 27 after being cooled and shaped, and a take-up reel is wound on a take-up machine 28, so that an optical cable product is finally formed.
The invention is provided with a forming crawler belt 10 for carrying out secondary processing and shaping on a circular optical cable sheath which is just extruded from an extruding machine, the shape of the circular groove on the surface of the optical cable sheath is pressed by virtue of the size of a specific groove on the forming crawler belt 10, the formed optical cable is further cooled and shaped by continuously passing through a hot water tank 25 and a cold water tank 26 after coming out of the forming crawler belt, and the formed optical cable continuously advances under the traction action of a tractor 27, and a take-up reel is wound by a take-up machine to form a final optical cable product.
The difficulty in the production process of the optical cable sheath is the forming of the spaced circular grooves, therefore, the invention develops a specific forming crawler belt and introduces the specific forming crawler belt into the production process of the optical cable, and the specific structure of the forming crawler belt 10 is as follows.
As shown in fig. 3 to 6, the forming track includes an upper side track 31 and a lower side track 32, a lower one of the upper side tracks completely attached to an upper one of the lower side tracks, and the forming track is installed at an inlet of the hot water tank. The upper and lower tracks 31 and 32 are identical in construction and size,
the outer circumferential surfaces of the upper crawler 31 and the lower crawler 32 are formed with crawler grooves 33 surrounding the crawler, and semicircular protrusions 34 are spaced apart from each other inside the crawler grooves 33. After the upper crawler belt and the lower crawler belt are jointed, the crawler belt grooves 33 of the crawler belts and the semicircular bulges 34 distributed in the crawler belt grooves 33 are completely symmetrical up and down, and a circular hole channel with spaced bulges is formed between the upper crawler belt and the lower crawler belt. The round optical cable extruded from the extruder 23 enters the round hole channel with the spacing bulges before being cooled and shaped, and the round optical cable is extruded by the spacing bulges to form spacing grooves on the surface of the optical cable. The width a of the semicircular bulges is equal to the width of the grooves on the surface of the optical cable, the intervals b of the bulges are consistent with the intervals of the grooves on the surface of the optical cable, and the radius of the crawler belt groove 33 on the surface of the crawler belt is consistent with the radius of the optical cable.
To ensure production continuity and cable surface spacing uniformity, the track wheels 30 on the upper track 31 and the lower track 32 are linked to the tractor 27. The circular hole channel with the interval bulges formed between the upper crawler belt and the lower crawler belt is a dynamic channel along with the rotation of the upper crawler belt and the lower crawler belt. Because the linear speed of the molding crawler and the main traction is synchronous, and the advancing speed of the optical cable is also consistent with the main traction speed of the production line, the dynamically-changed circular hole channel in the molding crawler is synchronously matched with the speed of the optical cable, and the continuous and stable formation of the interval grooves on the surface of the optical cable is ensured.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (1)
1. A processing method of an ultra-flexible optical cable is characterized by comprising the following steps: the optical cable comprises optical fibers (11) arranged from inside to outside, a tight sleeve layer (12), tensile yarns (13) and an outer protective layer (14), wherein circular grooves (15) are uniformly arranged on the outer protective layer (14) at intervals;
the processing method of the optical cable comprises the following steps: simultaneously releasing the tensile yarns and the optical fibers sleeved with the tight sleeve layers from an optical fiber pay-off rack, collecting the optical fibers into an extrusion molding machine, and processing an outer protective layer through an extrusion molding process in the extrusion molding machine to form an optical cable with a smooth circumferential surface; the optical cable is extruded in the forming crawler belt after coming out of the extruding machine, round grooves are uniformly and alternately arranged on the circumferential surface of the optical cable, the optical cable which is extruded and formed by the forming crawler belt sequentially passes through a hot water tank and a cold water tank for cooling and shaping, the optical cable is emited by a tractor after being cooled and shaped and is wound on a take-up machine to form an optical cable product finally;
the forming crawler (3) comprises an upper crawler (31), a lower crawler (32) and a crawler wheel (30), the upper crawler (31) and the lower crawler (32) are respectively and correspondingly wound on the crawler wheel (30), and the upper crawler (31) and the lower crawler (32) are vertically layered and attached to each other; the outer circumferential surfaces of the upper crawler belt (31) and the lower crawler belt (32) are provided with crawler belt grooves (33), a plurality of semicircular bulges (34) are arranged in the crawler belt grooves (33) at intervals, and after the upper crawler belt (31) and the lower crawler belt (32) are attached to each other, each semicircular bulge (34) on the upper crawler belt (31) and the corresponding semicircular bulge (34) on the lower crawler belt (32) are attached to each other to form a whole circle;
the bottom surface of the track groove (33) is arc-shaped;
the crawler wheels (30) on the upper crawler belt (31) and the lower crawler belt (32) are linked with the tractor (27);
the depth of the circular groove (15) is 0.5mm-1.0mm; the tensile yarns (13) are aramid yarns;
the outer jacket (14) is a low-smoke halogen-free sheath or a PVC sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011490020.3A CN112578516B (en) | 2020-12-17 | 2020-12-17 | Super-flexible optical cable and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011490020.3A CN112578516B (en) | 2020-12-17 | 2020-12-17 | Super-flexible optical cable and processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112578516A CN112578516A (en) | 2021-03-30 |
| CN112578516B true CN112578516B (en) | 2022-10-18 |
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| CN202011490020.3A Active CN112578516B (en) | 2020-12-17 | 2020-12-17 | Super-flexible optical cable and processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115390204A (en) * | 2022-08-23 | 2022-11-25 | 许二女 | Butterfly-shaped optical cable for 5G |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005128326A (en) * | 2003-10-24 | 2005-05-19 | Sumitomo Electric Ind Ltd | Optical fiber cable |
| JP2006058771A (en) * | 2004-08-23 | 2006-03-02 | Sumitomo Electric Ind Ltd | Optical fiber cable |
| CN112034571A (en) * | 2020-09-11 | 2020-12-04 | 宏安集团有限公司 | Anti-shrinkage multi-unit parallel beam tube optical cable and manufacturing method thereof |
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| CN112578516A (en) | 2021-03-30 |
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