Sectional type high-density steel wire reinforcing rib communication optical cable and manufacturing method thereof

Abstract

The sectional type high-density steel wire reinforcing rib communication optical cable comprises a reinforcing layer, a cable core layer, a waterproof layer and a protective layer, the reinforcing layer is arranged in the center of the communication optical cable; the cable core layer wraps the reinforcing layer and comprises a plurality of cable core units, and each cable core unit comprises a loose tube and a communication optical fiber arranged in the loose tube; the cable core units are distributed on the outer side face of the reinforcing layer in a surrounding mode, and the lengths of the cable core units are different. The waterproof layer wraps the cable core layer. The protective layer wraps the waterproof layer. According to the communication optical cable, the communication optical fibers in the communication optical cable are arranged in a sectional mode, the communication optical fibers are manufactured into different length specifications for cabling according to the distribution positions of the optical fiber sensors in engineering, and the communication optical cable has the advantages of being accurate in opening, easy to weld, convenient and fast to seal and good in sealing performance; waste of communication optical fibers can be effectively avoided, and the protection capability of communication optical cables and the stability of communication signals in environments with complex natural conditions such as islands and reefs are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of communication optical cables, and in particular to a segmented high-density steel wire reinforced rib communication optical cable and a manufacturing method thereof. Background Art

[0002] Communication optical cables have been widely used in the communication industry, especially in complex environments such as the seabed and islands and reefs. With their advantages of large-capacity transmission, low loss, and strong anti-interference capabilities, communication optical cables have become the mainstream product for current submarine and island communications.

[0003] In the fiber optic monitoring of geotechnical engineering, the communication optical cable is selected as the connecting line to connect the fiber optic sensor with the demodulator. When the existing conventional communication optical cable is used for welding with the fiber optic sensor, since the length of the communication optical fiber inside the communication optical cable is the same, but each fiber optic sensor needs to be welded with each optical fiber of the communication optical cable separately, it is easy to cause the welding length of each optical fiber in the optical cable to be different, which increases the difficulty of sealing the communication optical cable, causing the sealing effect to be substandard, and increasing the risk of interruption of the connection between the fiber optic sensor and the communication optical cable. When welding the communication optical cable and the optical fiber sensor, it is necessary to peel off a long section of the outer sheath of the communication optical cable, and cut off the complete communication optical fiber inside and then extract it, resulting in slow welding speed and low efficiency of conventional communication optical cables. Especially in the field of geotechnical engineering where the use environment is relatively complex, the disadvantages of conventional communication optical cables are obvious. Therefore, it is of great significance to propose and manufacture a communication optical cable that has a quick opening, is easy to weld, is convenient to seal and has good sealing performance to improve the efficiency, reliability and safety of the optical fiber communication system. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a segmented high-density steel wire reinforced rib communication optical cable and a manufacturing method thereof, including the following technical solutions: A segmented high-density steel wire reinforced rib communication optical cable comprises a reinforcement layer, a cable core layer, a water blocking layer and a protective layer; the reinforcement layer is arranged at the center of the communication optical cable; the cable core layer covers the reinforcement layer, the cable core layer comprises a plurality of cable core units, the cable core units comprise a loose tube and a communication optical fiber arranged inside the loose tube; the cable core units are distributed around the outer side of the reinforcement layer, and the length of each of the cable core units is different; the water blocking layer covers the cable core layer; the protective layer covers the water blocking layer.

[0005] Furthermore, the cable core unit is used to connect the information collection equipment, and the length of the cable core unit is determined according to the actual layout position of the corresponding information collection equipment at the engineering site.

[0006] Furthermore, the error between the actual length of the cable core unit and the set length is ≦10 mm.

[0007] Furthermore, the cable core units are arranged in a straight line along the reinforcement layer.

[0008] Furthermore, the reinforcement layer includes steel wire reinforcement ribs and arcuate grooves arranged on the outer side surfaces of the steel wire reinforcement ribs. The arcuate grooves are arranged along the length direction of the steel wire reinforcement ribs and are continuously arranged without intervals in the circumferential direction of the outer side surfaces of the steel wire reinforcement ribs.

[0009] Furthermore, the cable core layer is embedded in the arc groove of the steel wire reinforcement.

[0010] Furthermore, the water-blocking layer comprises a water-blocking yarn, which is wrapped around the cable core layer to form a dense wrapping layer, and the wrapping layer expands into a gel wrapping layer after coming into contact with water; the material of the water-blocking yarn comprises polyester industrial filament and cross-linked polyacrylic acid expansion material, and an adhesive is coated between the water-blocking yarn and the cable core layer.

[0011] Furthermore, the protective layer includes an outer sheath, a fiber layer and a steel strand layer from the outside to the inside, and the steel strand layer covers the water-blocking layer; the outer sheath is made of Teflon material; the fiber layer is made of ceramic fiber material; and the communication optical fiber is anti-micro-bend optical fiber.

[0012] Furthermore, the protective layer is provided with a mark on the outermost surface thereof, and the mark is made corresponding to the length of the different cable core units, and is used to indicate the length of each corresponding cable core unit.

[0013] A method for manufacturing a segmented high-density steel wire reinforced rib communication optical cable, used to manufacture the above communication optical cable, comprising the following steps: S1, according to the actual distribution position of the optical fiber sensor at the production site, a plurality of loose tubes of different lengths corresponding to the position and communication optical fibers of the same length as the loose tubes are manufactured; A set number of communication optical fibers are placed together to form a bundle, and the corresponding loose tubes are coated on the communication optical fibers by a loose tube coating machine to form a cable core unit; When making cable core units, the length error of a single cable core unit is ≤10mm; S2, the cable core units of different lengths are stretched and fixed along a straight line without any bending, and are embedded and arranged on the steel wire reinforcement ribs through the arc grooves in sequence according to the setting to form a cable core layer; S3, wrapping the water-blocking yarn around the outer surface of the cable core layer by a water-blocking yarn covering machine to form a water-blocking layer; S4, using a steel strand twisting device to twist the steel strands of the water-blocking layer to form a steel strand layer; S5, coating the steel strand layer with a fiber layer by a fiber layer coating device to form a fiber layer; S6, after the fiber layer is coated, the outer sheath is coated by a cabling machine.

[0014] Based on the above technical solution, the present invention has the following beneficial effects: 1. The communication optical fiber of the communication optical cable recorded in the present invention is set as a segmented type. According to the distribution position of the optical fiber sensor in the project, the communication optical fiber is made into different length specifications for cable making. When welding with the optical fiber sensor, according to the location of the optical fiber sensor, it is only necessary to open the corresponding position of the communication optical cable, and the communication optical fiber that needs to be welded inside can be pulled out and welded with the optical fiber sensor. The communication optical cable can be opened accurately and welded easily, avoiding the waste of communication optical fiber.

[0015] 2. Set the communication optical fiber inside the communication optical cable to be segmented. When the communication optical cable is fused with the optical fiber sensor, the location of the communication optical fiber can be quickly found according to the mark set on the outer layer of the optical cable. In addition, the communication optical fiber is embedded in the arc groove on the outer periphery of the steel wire reinforcement. The position of the communication optical fiber is fixed during the operation, and the operation process of cutting the outer layer of the optical cable will not affect other optical fibers inside the optical cable.

[0016] 3. The communication optical fiber is segmented and cabled. During the fusion splicing operation with the optical fiber sensor, there is no need to completely cut the communication optical cable to extract the communication optical fiber to be fused. The cut gap on the optical cable is small. After fusion connection with the optical fiber sensor, the cable sealing operation is easy to operate, takes a short time, and has high fusion efficiency and success rate.

[0017] 4. The communication optical cable recorded in the present invention has a ceramic fiber layer as a protective layer between the outer sheath and the steel strand layer. The thermal expansion coefficient of the ceramic fiber is much lower than that of Teflon and metal materials, and it is less affected by temperature. At the same time, it has a high hardness and can resist a certain external deformation. In an island and reef environment with a large temperature difference between day and night, the fiber layer can buffer the expansion / contraction of the outer sheath caused by the temperature difference, avoid compressing the internal optical fiber, reduce optical fiber loss, and improve the reliability of optical fiber communication signals in environments with complex natural conditions.

[0018] 5. Compared with the existing filling materials, the water-blocking layer recorded in the present invention is made of water-blocking yarn. The existing filling materials of communication optical cables are usually grease, which will contaminate the end of the communication optical cable and increase the difficulty of ring cutting the optical cable. The water-blocking gauze recorded in the present invention is made of polyester industrial filament and cross-linked polyacrylic acid expansion material. Polyester industrial filament is used as the base material and has good tensile strength and elongation; while the cross-linked polyacrylic acid expansion material can expand rapidly after contacting water to form a stable gel layer with strong water retention capacity. While effectively avoiding longitudinal water seepage of the optical cable, it can also ensure that the inside of the communication optical cable is clean and tidy. Adhesive is coated between the water-blocking yarn and the loose sleeve of the cable core layer to ensure that the water-blocking yarn fits tightly with the loose sleeve and is not easy to fall off.

[0019] 6. The communication optical cable described in the present invention uses micro-bend-resistant optical fiber as the internal communication optical fiber, which can avoid bending of the communication optical cable during the laying process and affect the optical fiber loss, thereby increasing the transmission efficiency of the optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : Schematic diagram of the structure of a communication optical cable in an exemplary embodiment; Figure 2 : Schematic diagram of the cable core layer layout structure in an exemplary embodiment. DETAILED DESCRIPTION

[0021] It should be noted that: 1. Certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different terms to refer to the same component. This specification and claims do not use the difference in terms as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction.

[0022] 2. Unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] 3. Unless otherwise defined, technical or scientific terms used in the present disclosure should have the common meanings understood by persons having ordinary skills in the field to which the present disclosure belongs.

[0024] The following is combined with Figure 1 and attached Figure 2 , the present invention is described in detail by way of embodiments.

[0025] This embodiment describes a segmented high-density steel wire reinforced rib communication optical cable, comprising Reinforcement layer, cable core layer, water-blocking layer and protective layer.

[0026] The reinforcement layer is a steel wire reinforcement rib 7, which is used to increase the tensile and compressive properties of the communication optical cable. The steel wire reinforcement rib 7 is arranged at the center of the communication optical cable, that is, located on the central axis of the communication optical cable.

[0027] An arc groove 701 is provided on the outer side surface of the steel wire reinforcement rib 7 .

[0028] The arc groove 701 is arranged along the length direction of the steel wire reinforcement rib 7 and is integrally provided with the steel wire reinforcement rib 7. A plurality of arc grooves 701 are provided and are continuously provided without intervals along the outer side surface of the steel wire reinforcement rib 7 in the circumferential direction.

[0029] The cable core layer includes a plurality of cable core units, each of which is composed of a loose tube 5 and a plurality of communication optical fibers 6 sleeved inside the loose tube.

[0030] The cable core layer is embedded in the arc groove 701 of the steel wire reinforcement rib 7. Under the limiting effect of the arc groove 701, the cable core layer can be arranged according to the set position.

[0031] Arrange the arc groove 701, and arrange the cable core layer embedded in the arc groove 701, can guide and limit the relative position of the cable core layer and the steel wire reinforcement 7, can keep the loose tube 5 in a straight line during the cabling process, avoid the loose tube 5 from being entangled, and can accurately locate the position of the segmented loose tube 5 after cabling.

[0032] In the actual use of communication optical cables, the arc groove 701 can be provided to avoid squeezing and misalignment between cable cores, and each cable core can be isolated from each other, so that a faulty communication optical fiber can be quickly identified, and a designated cable core unit can be quickly and individually stripped.

[0033] At the end of the communication optical cable, the cable core units of the cable core layer are respectively set to different lengths, that is, the distance between the end face of each cable core unit and the end face of the communication optical cable is different.

[0034] By setting the cable core units to different lengths, the following technical effects can be achieved: When the communication optical cable and the optical fiber sensor are fused, a smaller gap is opened at the specified position of the communication optical cable as needed, so that the communication optical fiber inside the optical cable can be pulled out; After the fusion with the optical fiber sensor is completed, the subsequent sealing of the communication cable gap is more convenient and efficient, and because the gap is small, the sealing operation is safer and more reliable, which can improve the efficiency of fusion sealing operations in complex environments; The length of the cable core unit can be set according to actual operational requirements, which can effectively reduce the cost of optical fiber materials while ensuring information transmission of the communication optical cable.

[0035] In order to obtain better welding and sealing effects, 1. Set the length of the cable core unit as follows: Determine the length of the cable core unit based on the actual location of the optical fiber sensor at the project site; The cable core unit is manufactured by the packaging process timed cutting process, that is, during the production process, the production is stopped regularly according to the set cable core length, and the cable core length error is controlled to be ≦10mm to ensure a high pass rate of the cable core unit production.

[0036] 2. Set the arrangement of cable core units of different lengths as follows: All cable core units are evenly arranged inside the optical cable along the steel wire reinforcement. In the production process, the traditional cable cores are arranged and produced in a mutually entangled manner. In order to ensure the accuracy of the length of each cable core, the communication optical cable recorded in the present invention requires all cable cores to be placed along a straight line without any bends. Therefore, in the production process, the cable cores need to be straightened and fixed, and then the production of protective structures such as loose tubes is carried out. In addition, workers are required to stop production at any time according to the length during the production process to accurately cut the cable cores.

[0037] The water-blocking layer is provided to cover the cable core layer.

[0038] Different from the prior art in which the water-blocking layer is generally composed of a filling material, the water-blocking layer described in the present invention is provided as a water-blocking yarn 4 .

[0039] The water-blocking yarn 4 can be manually or mechanically wrapped around the outer periphery of the cable core layer to form a dense wrapping layer, which is convenient for mass production in the cabling process.

[0040] Furthermore, the use of the water-blocking yarn 4 as the water-blocking layer can avoid the problems of uneven filling and difficulty in filling caused by commonly used filling materials.

[0041] The water-blocking yarn 4 is woven from superabsorbent polymer, and its main materials include polyester industrial filament and cross-linked polyacrylic acid expansion material. Polyester industrial filament as the base material has good tensile strength and elongation; while the cross-linked polyacrylic acid expansion material can expand rapidly after contacting water to form a stable gel layer, which has a strong water retention capacity and can effectively prevent moisture from penetrating and diffusing into the cable core layer, protecting the communication optical fiber inside the cable core layer.

[0042] In order to obtain a better water-blocking effect, an adhesive is coated between the water-blocking yarn 4 and the loose tube 5 of the cable core layer to ensure that the water-blocking yarn 4 and the loose tube 5 are tightly fitted and not easy to fall off.

[0043] The protective layer comprises at least an outer sheath 1, a fiber layer 2 and a steel strand layer 3 from the outside to the inside, and the steel strand layer 3 covers the water-blocking layer.

[0044] The outer sheath 1 is made of Teflon material. The outer sheath 1 can form a closed space to prevent moisture condensation and / or electromagnetic interference inside the communication optical cable in humid air; Teflon material has excellent corrosion resistance and wide temperature resistance, can effectively cope with complex island and reef environments, and extend the service life of the communication optical cable.

[0045] The fiber layer 2 is made of ceramic fiber material. The thermal expansion coefficient of ceramic fiber is much lower than that of Teflon and metal materials. It is less affected by temperature. At the same time, it has high hardness and can resist certain external deformation. Therefore, when the outer sheath 1 expands / extrudes in a wide temperature environment of islands and reefs, the fiber layer 2 can play a buffering role to prevent the outer sheath from compressing the internal communication optical fiber due to large expansion / contraction deformation, resulting in light loss.

[0046] The steel strand layer 3 is made of 304 stainless steel twisted together to increase the tensile strength and corrosion resistance of the communication optical cable.

[0047] In this embodiment: 1. The communication optical fiber adopts anti-microbend optical fiber, which can greatly reduce the optical loss of the communication optical cable after bending; 2. At the end of the communication optical cable, a mark is set on the outer sheath, and the mark is made corresponding to the length of the cable core unit, which is used to mark the length of each corresponding cable core unit. The mark can be set as a color, a convex point or a number.

[0048] Based on the above-mentioned segmented high-density steel wire reinforced rib communication optical cable, the present invention also records a segmented high-density steel wire reinforced rib communication optical cable manufacturing method, comprising the following steps: S1, according to the actual distribution position of the optical fiber sensor at the production site, a plurality of loose tubes of different lengths corresponding to the position and communication optical fibers of the same length as the loose tubes are manufactured; A set number of communication optical fibers are placed together to form a bundle, and the corresponding loose tubes are coated on the communication optical fibers by a loose tube coating machine to form a cable core unit.

[0049] When making cable core units, the length error of a single cable core unit should be ensured to be ≤10mm.

[0050] S2, the cable core units of different lengths are stretched and fixed along a straight line without any bending, and are embedded and arranged on the steel wire reinforcement ribs through the arc grooves in sequence according to the settings to form a cable core layer.

[0051] S3, wrapping the water-blocking yarn around the outer surface of the cable core layer by a water-blocking yarn covering machine to form a water-blocking layer.

[0052] S4, using a steel strand twisting device to twist the steel strands of the water-blocking layer to form a steel strand layer; S5, coating the steel strand layer with a fiber layer by a fiber layer coating device to form a fiber layer; S6, after the fiber layer is coated, the outer sheath is coated by a cabling machine.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A segmented high-density steel wire reinforced rib communication optical cable, characterized in that: include Reinforcement layer, cable core layer, water blocking layer, protective layer; The reinforcement layer is arranged at the center of the communication optical cable; The cable core layer covers the reinforcement layer, the cable core layer includes a plurality of cable core units, and the cable core unit includes a loose tube and a communication optical fiber arranged inside the loose tube; The cable core units are distributed around the outer side of the reinforcement layer, and the lengths of each of the cable core units are different; The water blocking layer covers the cable core layer; The protective layer covers the water-blocking layer.

2. A segmented high-density steel wire reinforced rib communication optical cable according to claim 1, characterized in that: The cable core unit is used to connect the information collection equipment, and the length of the cable core unit is determined according to the actual layout position of the corresponding information collection equipment at the engineering site.

3. A segmented high-density steel wire reinforced rib communication optical cable according to claim 1, characterized in that: The error between the actual length of the cable core unit and the set length is ≤10 mm.

4. The segmented high-density steel wire reinforced rib communication optical cable according to claim 1, characterized in that: The cable core units are arranged in a straight line along the reinforcement layer.

5. The segmented high-density steel wire reinforced rib communication optical cable according to claim 1, characterized in that: The reinforcement layer includes steel wire reinforcement ribs and arcuate grooves arranged on the outer side surfaces of the steel wire reinforcement ribs. The arcuate grooves are arranged along the length direction of the steel wire reinforcement ribs and are continuously arranged without intervals in the circumferential direction of the outer side surfaces of the steel wire reinforcement ribs.

6. A segmented high-density steel wire reinforced rib communication optical cable according to claim 5, characterized in that: The cable core layer is embedded in the arc groove of the steel wire reinforcement.

7. The segmented high-density steel wire reinforced rib communication optical cable according to claim 1, characterized in that: The water-blocking layer comprises a water-blocking yarn, which is wound around and covers the cable core layer to form a dense wrapping layer, and the wrapping layer expands into a gel wrapping layer after contacting water; The material of the water-blocking yarn tape includes polyester industrial filaments and cross-linked polyacrylic acid expansion materials, and an adhesive is coated between the water-blocking yarn tape and the cable core layer.

8. The segmented high-density steel wire reinforced rib communication optical cable according to claim 1, characterized in that: The protective layer includes an outer sheath, a fiber layer and a steel strand layer from the outside to the inside, and the steel strand layer covers the water-blocking layer; the outer sheath is made of Teflon material; the fiber layer is made of ceramic fiber material; and the communication optical fiber is anti-microbend optical fiber.

9. The segmented high-density steel wire reinforced rib communication optical cable according to claim 1, characterized in that: The protective layer is provided with a mark on the outermost surface thereof, and the mark is made corresponding to the length of the different cable core units and is used to indicate the length of each corresponding cable core unit.

10. A method for manufacturing a segmented high-density steel wire reinforced rib communication optical cable, comprising the following steps: S1, according to the actual distribution position of the optical fiber sensor at the production site, a plurality of loose tubes of different lengths corresponding to the position and communication optical fibers of the same length as the loose tubes are manufactured; A set number of communication optical fibers are placed together to form a bundle, and the corresponding loose tubes are coated on the communication optical fibers by a loose tube coating machine to form a cable core unit; When making cable core units, the length error of a single cable core unit is ≤10mm; S2, the cable core units of different lengths are stretched and fixed along a straight line without any bending, and are embedded and arranged on the steel wire reinforcement ribs through the arc grooves in sequence according to the setting to form a cable core layer; S3, wrapping the water-blocking yarn around the outer surface of the cable core layer by a water-blocking yarn covering machine to form a water-blocking layer; S4, using a steel strand twisting device to twist the steel strands of the water-blocking layer to form a steel strand layer; S5, coating the steel strand layer with a fiber layer by a fiber layer coating device to form a fiber layer; S6, after the fiber layer is coated, the outer sheath is coated by a cabling machine.

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