CN112578513A - Novel field emergency optical cable and preparation method thereof - Google Patents
Novel field emergency optical cable and preparation method thereof Download PDFInfo
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- CN112578513A CN112578513A CN201910929855.5A CN201910929855A CN112578513A CN 112578513 A CN112578513 A CN 112578513A CN 201910929855 A CN201910929855 A CN 201910929855A CN 112578513 A CN112578513 A CN 112578513A
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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
- G02B6/4432—Protective covering with fibre reinforcements
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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
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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
- G02B6/4436—Heat resistant
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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
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
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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
- G02B6/4479—Manufacturing methods of optical cables
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Abstract
The invention belongs to the technical field of communication optical cables, and relates to a novel field emergency optical cable and a preparation method thereof. The optical cable is mainly characterized in that the cable core is a combined cable core with a plurality of optical fiber units, the optical fiber units are uniformly arranged around the central reinforcement unit and are molded at one time; a nonmetal central reinforcement unit is adopted in the cable core; the optical fiber sheath of the optical fiber unit is provided with the V-shaped fiber stripping groove, so that optical fiber connection during construction is facilitated. The invention relates to a multi-core armored optical cable with multiple optical fiber cores, good flexibility, compression resistance and impact resistance, which can be used in emergency and severe environments such as rapid wiring of individual soldiers in an army, vehicle-mounted wiring, broadcast and television relay, emergency repair, temporary communication systems, local area network wiring, machine room allocation and the like, is an emergency optical cable with safety, long service life and strong compression and impact resistance, and is particularly suitable for serving as an emergency substitute optical cable for a communication line damaged by emergency rescue in wartime of the army.
Description
Technical Field
The invention belongs to the technical field of communication optical cables, and particularly relates to a novel field emergency optical cable and a preparation method thereof.
Background
Compared with copper cable communication, the optical fiber communication has the advantages of large transmission capacity, low transmission loss, small size, light weight, electromagnetic interference resistance, small channel crosstalk and good confidentiality; therefore, the application of the optical fiber communication to army field communication and disaster relief emergency communication has great advantages in the future. In the environments such as battlefields, disaster sites, sudden public safety sites and the like, factors such as vehicle or mountain falling stones and the like, such as damage caused by smashing and pressing, severe climate change, damage of wild animals and the like exist, and the requirement on the density of an optical fiber core is higher and higher, so that the conventional common optical cable is difficult to meet the application requirement of the special environment. In order to solve the problems, a field emergency optical cable with a novel structure needs to be designed, a tight-buffered optical fiber and a combined cable core structure is adopted, and an optical cable armored by a stainless steel hose is adopted, so that the field emergency optical cable becomes an important development trend of future emergency communication optical cables.
Disclosure of Invention
According to the requirements of the background art, the technical problem to be solved by the invention is to provide a novel field emergency optical cable and a preparation method thereof, and the technical scheme of the invention is as follows:
1-2 or 3-4 mutually parallel tightly sleeved optical fibers are coated by an optical fiber sheath 3 with an oval cross section to form an optical fiber unit with an oval cross section, and 6-8 optical fiber units are uniformly distributed around the central reinforcing member unit by taking the central reinforcing member unit as the center to form an internal structure of the multi-optical fiber unit combined cable core with the optical fiber units uniformly distributed around the central reinforcing member unit;
the tight-buffered optical fiber is an optical fiber with the outer surface of a colored optical fiber 1 coated with a tight-buffered layer 2, the central reinforcing part unit is a central reinforcing part unit with a circular cross section, which is formed by extruding a non-metal reinforcing part extrusion cushion layer 6 on the surface of a non-metal central reinforcing part 5 with a circular cross section, and the reinforcing part extrusion cushion layer 6 is a buffer layer of the central reinforcing part;
the outer surface of an optical fiber sheath 3 with an oval cross section of each optical fiber unit is provided with a longitudinal fiber stripping groove 4, and a cable core water-blocking tensile layer 7, a cable core coating layer 8 and an inner sheath 9 are sequentially coated on the outer surface of the inner structure of the multi-optical fiber unit combined cable core from inside to outside to form a multi-optical fiber unit combined cable core; the armor layer 10 is coated on the inner sheath 9, and the outer sheath 11 is coated on the armor layer 10 to form a novel field emergency optical cable;
the colored optical fiber 1 is a bending-resistant optical fiber which is colored, and the optical fiber is marked by a chromatogram;
the tight sleeve layer 2 is a layer of acrylic resin coated on the colored optical fiber 1 in an ultraviolet curing mode, or a layer of nylon material, low-smoke halogen-free material (LSZH), polyvinyl chloride (PVC) or thermoplastic polyurethane elastomer rubber (TPU) extruded on the colored optical fiber 1 by an extruding machine;
the optical fiber sheath 3 with the oval cross section is an extruded tight-sleeved optical fiber inner protective layer, the optical fiber sheaths 3 of 6-8 optical fiber units are simultaneously extruded and formed in the same die, and when the optical fiber sheaths 3 are extruded, longitudinal V-shaped fiber stripping grooves 4 are formed on the outer side surfaces of the optical fiber sheaths 3;
the central reinforcement 5 is made of Fiber Reinforced Plastic (FRP) or Kevlar Fiber Reinforced Plastic (KFRP) and has the characteristics of softness and light weight, the reinforcement extrusion cushion layer 6 is used as a buffer layer of the central reinforcement 5 and extruded on the outer surface of the central reinforcement 5, and the reinforcement extrusion cushion layer 6 is made of nylon material, low-smoke halogen-free material (LSZH), polyvinyl chloride (PVC) or thermoplastic polyurethane elastomer rubber (TPU);
the cable core water-blocking tensile layer 7 is made of water-blocking aramid yarns, and the structure of the cable core water-blocking tensile layer 7 is that the water-blocking aramid yarns are parallelly arranged on the outer surface of the inner structure of a multi-optical fiber unit combined cable core consisting of 6-8 optical fiber units and a central reinforcement unit, or a layer of water-blocking aramid yarns are twisted on the outer surface of the inner structure of the multi-optical fiber unit combined cable core in a spiral twisting mode;
the cable core coating layer 8 is an extruded layer of low-smoke halogen-free material;
the inner sheath 9 is made of thermoplastic polyurethane elastomer (TPU) sheath material, and the inner sheath 9 is a TPU layer extruded on the cable core coating layer 8;
the armor layer 10 is a metal hose armor layer, the material of the armor layer 10 is a metal stainless steel spiral pipe, the armor layer 10 performs mechanical protection on the cable core, and strengthens and protects optical fiber units in the inner cable core, so that the optical cable has high pressure resistance, and the influence of external rolling on optical signal transmission of the optical fibers is avoided;
the outer sheath 11 is made of thermoplastic polyurethane elastomer (TPU) sheath materials, the outer sheath 11 is a TPU layer extruded on the armor layer 10 and covering the armor layer 10, and the extruded TPU improves the oil resistance, the wear resistance, the cutting resistance, the corrosion resistance, the ultraviolet ray aging resistance, the high and low temperature resistance and the flame retardant property of the optical cable.
The preparation method of the novel field emergency optical cable comprises the following steps:
the preparation method of the novel field emergency optical cable with 6 optical fiber units and 2 optical fibers contained in each optical fiber unit and with the optical fiber core number of 12 cores is the same as that of the novel field emergency optical cable with other optical fiber units or optical fibers with other core numbers within the range of 1-4 contained in each optical fiber unit;
the first, main process equipment:
the device comprises a high-speed optical fiber coloring machine, a 30 plastic extruding machine, a 90 plastic extruding machine, a wrapping machine, a steel wire flattening machine and a long-scale automatic pipe making machine;
secondly, the preparation process comprises the following steps:
step one, manufacturing a colored optical fiber 1:
coloring the selected bending-resistant optical fiber in a high-speed optical fiber coloring machine to prepare a colored optical fiber 1, wherein the optical fiber is marked by a chromatogram;
step two, coating a tight-buffered layer 2 on the colored optical fiber 1 to manufacture the tight-buffered optical fiber:
coating a layer of acrylic resin on the colored optical fiber 1 in an ultraviolet curing mode to form a tight-buffered optical fiber as a tight-buffered layer 2; or extruding a layer of nylon material, low-smoke halogen-free material (LSZH), polyvinyl chloride (PVC) or thermoplastic polyurethane elastomer rubber (TPU) as a tight-buffered layer 2 on the colored optical fiber 1 by a 30-plastic extruding machine to prepare a tight-buffered optical fiber;
the technological parameters of the tight-buffered optical fiber are as follows: the outer diameter of the colored optical fiber coated with the tight-buffered layer 2, namely the outer diameter of the tight-buffered optical fiber, is 0.5 +/-0.05 mm;
step three, manufacturing a central reinforcement unit:
extruding a layer of nylon material, low-smoke halogen-free material (LSZH), polyvinyl chloride (PVC) or thermoplastic polyurethane elastomer rubber (TPU) as a non-metal reinforcing piece extrusion cushion layer 6 on the surface of a non-metal central reinforcing piece 5 with a circular cross section and made of Fiber Reinforced Plastic (FRP) or Kevlar Fiber Reinforced Plastic (KFRP) by using a 90-degree extruding machine, and compounding the reinforcing piece extrusion cushion layer 6 and the central reinforcing piece 5 to form a central reinforcing piece unit with a circular cross section;
central stiffener unit process parameters of circular cross section: the diameter of the core layer, namely the diameter of the central reinforcing member 5, is 1.0mm, the thickness of the extruded cushion layer, namely the thickness of the extruded cushion layer 6 of the reinforcing member is 0.5mm, and the outer diameter of the central reinforcing member unit is 2.0 mm;
step four, manufacturing an optical fiber unit containing 2 optical fibers and manufacturing 6 optical fiber units and a central reinforcement unit into an internal structure of the multi-optical fiber unit combined cable core:
manufacturing two-core-number optical fiber units of an optical fiber sheath 3 with an oval cross section by using 2 tightly-sleeved optical fibers, simultaneously forming a V-shaped fiber stripping groove 4 on the outer side of the optical fiber sheath 3, uniformly arranging 6 oval optical fiber units around a central reinforcing part unit, and manufacturing an internal structure of a multi-optical fiber unit combined cable core; the process adopts a one-step forming die, and is formed by a 30 plastic extruding machine in one step, 6 optical fiber units are formed in one step, and an internal structure of the multi-optical fiber unit combined cable core with the 6 optical fiber units uniformly distributed around the central reinforcement unit is manufactured;
the technological parameters of the two-core optical fiber unit with the oval cross section are as follows: ellipse minor axis: 1.5mm, major axis of ellipse: 1.8 mm;
step five, coating a cable core water-blocking tensile layer 7, a cable core coating layer 8 and an inner sheath 9 to manufacture a multi-optical fiber unit combined cable core;
1. and 7, coating a cable core water-blocking tensile layer:
the waterproof aramid yarn is coated outside the combined cable core structure, and two methods are adopted for manufacturing the waterproof tensile layer of the cable core: the waterproof aramid yarn is fully placed on the outer surface of the multi-optical-fiber-unit combined cable core structure in parallel through an active pay-off device, or the waterproof aramid yarn is wrapped on the inner structure of the multi-optical-fiber-unit combined cable core through a wrapping machine in a spiral twisting mode;
2. and (3) coating a cable core coating layer 8:
a layer of low-smoke halogen-free material extruded by a 90-degree plastic extruding machine is used as a cable core coating layer 8, and a cable core water-blocking tensile layer 7 and the internal structure of the combined cable core are coated together;
3. coating the inner sheath 9:
extruding a layer of thermoplastic polyurethane elastomer rubber (TPU) sheath material outside the cable core cladding layer by a 90-degree extruding machine to serve as an inner sheath 9, and manufacturing the multi-optical fiber unit combined cable core;
the process parameters of the inner sheath and the multi-fiber unit combined cable core are as follows: the thickness of the inner sheath is 0.5mm, the outer diameter of the inner sheath is 6.2mm, and the outer diameter of the multi-fiber unit combined cable core is 6.2 mm;
step six, cladding the armor layer 10:
1. pressing the stainless steel wire into a metal band with uniform thickness and width by using a steel wire flattening mill;
2. the metal belt is prepared into a spiral stainless steel metal hose coated on an inner sheath of the combined cable core through a long-length automatic pipe making machine, the prepared stainless steel metal hose is used as an armor layer 10 to perform armor protection on optical fiber units of the multi-optical fiber unit combined cable core, and a gap of 0.3-0.4 mm is formed between the inner wall of the armor layer 10 and the inner sheath;
the technological parameters of the armor layer are as follows: the outer diameter of the spiral stainless steel metal hose for armor is 7.6mm, the inner diameter is 6.9mm, and the spiral gap is 0.1-0.5 mm;
step seven, extruding the outer sheath 11:
a layer of thermoplastic polyurethane elastomer rubber (TPU) sheath material is extruded outside the armor layer 10 by a 90-degree extruding machine to be used as an outer sheath 11, so that the preparation of the novel field emergency optical cable with 6 optical fiber units, each optical fiber unit comprises 2 optical fibers, and the number of the optical fiber cores is 12;
outer sheath and optical cable process parameters: the thickness of the outer sheath: 1.5mm, outer diameter of optical cable: 10.6 mm.
The optical fiber unit combined type optical cable is characterized in that the optical cable core is made into a multi-optical fiber unit combined type cable core, the optical fiber units are uniformly arranged around the central reinforcement unit and are formed in one step, and the number of optical fiber cores in the cable core is large; in the multi-optical fiber unit combined cable core, the nonmetal central reinforcement unit is adopted, so that the multi-optical fiber unit combined cable core has the characteristics of high tensile force resistance, light weight and excellent bending performance; the optical fiber sheath 3 of the optical fiber unit is provided with the V-shaped fiber stripping groove 4, so that the stripping efficiency of the optical fiber is improved, and the optical fiber splicing is convenient during construction.
By adopting the technical scheme, the invention has the following technical effects:
1. the invention adopts the bending-resistant optical fiber, has small bending radius, and is suitable for complex severe environments such as field operations, emergency disaster relief and the like;
2. the tight-buffered optical fiber is coated and manufactured by acrylic resin, or a layer of nylon material, low-smoke halogen-free material, polyvinyl chloride or thermoplastic polyurethane elastomer rubber is extruded to the colored optical fiber 1 by a 30-plastic extruding machine to be used as the tight-buffered layer 2, so that the production efficiency is high, and the protection effect on the optical fiber is excellent;
3. the nonmetal central reinforcement unit is adopted, so that the nonmetal central reinforcement unit has the characteristics of high tensile force resistance, light weight and excellent bending performance;
4. the multi-optical fiber unit combined cable core is adopted, the optical fiber units surround the central reinforcement unit and are formed in one step, the number of optical fiber cores in the cable core is large, and the production efficiency is high;
5. the optical fiber jacket 3 of the optical fiber unit in the multi-optical fiber unit combined cable core is provided with the fiber stripping groove 4, so that the stripping efficiency of the optical fiber is improved, and the splicing is convenient;
6. the multi-optical fiber unit combined type cable core outer reinforcement, namely the cable core water-blocking tensile layer, adopts water-blocking aramid yarns, so that the tensile and water-blocking performance of the optical cable is improved;
7. the armor layer adopts the metal spiral pipe, the protection of the cable core is enhanced, the side pressure resistance of the optical cable is improved, and the optical cable has excellent bending resistance;
8. the outer sheath of the optical cable is made of thermoplastic polyurethane elastomer rubber (TPU) material, and has the capabilities of low smoke, zero halogen, flame retardance, low toxicity, oil resistance, wear resistance, cutting resistance, corrosion resistance, ultraviolet aging resistance, salt mist resistance and humidity resistance;
9. the optical cable adopts a full-dry structure, can be vertically laid, is clean and sanitary in connection and has high efficiency.
The invention has the beneficial effects that: the invention discloses a multi-optical fiber unit combined cable core, wherein a plurality of optical fiber units are uniformly arranged around a central reinforcement unit in the cable core and are extruded and molded by a plastic extruding machine and a die at one time, and a novel field emergency optical cable made of the multi-optical fiber unit combined cable core is a severe environment resistant multi-core armored optical cable with multiple optical fiber cores, good flexibility, compression resistance and impact resistance, can be used for emergency severe environments such as rapid wiring of single soldiers in troops, vehicle-mounted wiring, broadcast television relay, emergency repair, temporary communication systems, local area network wiring, machine room allocation and the like, is a safe emergency optical cable with long service life and strong compression resistance and impact resistance, and is particularly suitable for emergency rescue damaged communication lines in troops during wartime as an emergency substitute optical cable.
Drawings
Fig. 1 is a schematic cross-sectional structure view of a novel field emergency optical cable.
In the figure, 1 is a colored optical fiber, 2 is a tight sleeve layer, 3 is an optical fiber sheath, 4 is a fiber stripping groove, 5 is a central reinforcing piece, 6 is a reinforcing piece extrusion cushion layer, 7 is a cable core water-blocking tensile layer, 8 is a cable core coating layer, 9 is a sheath, 10 is an armor layer, and 11 is an outer sheath.
Detailed Description
The technical solution of the present invention is described in detail and fully with reference to the following embodiments and accompanying drawings. The embodiment is the novel field emergency optical cable shown in fig. 1 and provided with 6 optical fiber units, each optical fiber unit comprises 2 optical fibers, the number of the optical fibers is 12, 2 tightly sleeved optical fibers which are parallel to each other are coated by an optical fiber sheath 3 with an oval cross section to form an optical fiber unit with an oval cross section, the 6 optical fiber units are uniformly distributed around the central reinforcing member unit by taking the central reinforcing member unit as the center, and the internal structure of the multi-optical fiber unit combined cable core with the optical fiber units uniformly distributed around the central reinforcing member unit is formed.
The tight-buffered optical fiber is an optical fiber with the outer surface of the colored optical fiber 1 coated with the tight-buffered layer 2, the central reinforcing part unit is a central reinforcing part unit with a circular cross section formed by extruding a non-metal reinforcing part extrusion cushion layer 6 on the surface of a non-metal central reinforcing part 5 with a circular cross section, and the reinforcing part extrusion cushion layer 6 serves as a central reinforcing part buffer layer.
The outer surface of an optical fiber sheath 3 with an oval cross section of each optical fiber unit is provided with a longitudinal fiber stripping groove 4, and a cable core water-blocking tensile layer 7, a cable core coating layer 8 and an inner sheath 9 are sequentially coated on the outer surface of the inner structure of the combined cable core of the plurality of optical fiber units from inside to outside to form a multi-optical fiber unit combined cable core; armor 10 cladding is on inner sheath 9, and the cladding of oversheath 11 constitutes a novel emergent optical cable of field operations on armor 10.
The colored optical fiber 1 is a bending-resistant optical fiber which is colored, the optical fiber is marked by a color spectrum, and the tight-buffered layer 2 is a layer of acrylic resin which is coated on the colored optical fiber 1 in an ultraviolet curing mode.
The optical fiber sheath 3 with the oval cross section is an extruded tight-sleeved optical fiber inner protective layer, the optical fiber sheaths 3 of 6 optical fiber units are simultaneously extruded and formed in the same die, and when the optical fiber sheath 3 is extruded, a longitudinal V-shaped fiber stripping groove 4 is formed on the outer side surface of the optical fiber sheath 3;
the material of central reinforcement 5 is Fibre Reinforced Plastic (FRP), has soft and light in weight's characteristics, and the crowded bed course of reinforcement 6 extrudes at the surface of central reinforcement 5 as central reinforcement buffer layer, and the material of the crowded bed course of reinforcement 6 is non-metallic low smoke and no halogen material.
The cable core water-blocking tensile layer 7 is made of water-blocking aramid yarns, and the structure of the cable core water-blocking tensile layer 7 is that the water-blocking aramid yarns are parallelly arranged on the outer surface of the internal structure of the combined cable core of the multi-optical fiber unit consisting of the 6 optical fiber units and the central reinforcement unit. The cable core coating layer 8 is a layer of extruded low-smoke halogen-free material. The inner sheath 9 is made of thermoplastic polyurethane elastomer (TPU) sheath material, and the inner sheath 9 is a TPU layer extruded on the cable core coating layer 8.
The outer sheath 11 is made of thermoplastic polyurethane elastomer (TPU) sheath materials, the outer sheath 11 is a TPU layer which is extruded on the armor layer 10 and wraps the armor layer 10, and the extruded TPU improves the oil resistance, the wear resistance, the cutting resistance, the corrosion resistance, the ultraviolet ray aging resistance, the high and low temperature resistance and the flame retardant property of the optical cable.
The preparation method of the novel field emergency optical cable with 6 optical fiber units and 2 optical fibers contained in each optical fiber unit and the optical fiber core number of 12 cores comprises the following steps:
the first, main process equipment:
the device comprises a high-speed optical fiber coloring machine, a 30 plastic extruding machine, a 90 plastic extruding machine, a wrapping machine, a steel wire flattening machine and a long-scale automatic pipe making machine;
secondly, the preparation process comprises the following steps:
step one, manufacturing a colored optical fiber 1:
coloring the selected bending-resistant optical fiber in a high-speed optical fiber coloring machine to prepare a colored optical fiber 1, wherein the optical fiber is marked by a chromatogram;
step two, coating a tight-buffered layer 2 on the colored optical fiber 1 to manufacture the tight-buffered optical fiber:
coating a layer of acrylic resin on the colored optical fiber 1 in an ultraviolet curing mode to form a tight-buffered optical fiber as a tight-buffered layer 2;
the technological parameters of the tight-buffered optical fiber are as follows: the outer diameter of the colored optical fiber coated with the tight-buffered layer 2, namely the outer diameter of the tight-buffered optical fiber, is 0.5 +/-0.05 mm;
step three, manufacturing a central reinforcement unit:
extruding a nylon material layer as a nonmetallic reinforcing member extrusion cushion layer 6 on the surface of a nonmetallic central reinforcing member 5 with a circular cross section and made of Fiber Reinforced Plastic (FRP) by a 90-degree extruding machine, and compounding the reinforcing member extrusion cushion layer 6 and the central reinforcing member 5 to form a central reinforcing member unit with a circular cross section;
central stiffener unit process parameters of circular cross section: the diameter of the core layer, namely the diameter of the central reinforcing member 5, is 1.0mm, the thickness of the extruded cushion layer, namely the thickness of the extruded cushion layer 6 of the reinforcing member is 0.5mm, and the outer diameter of the central reinforcing member unit is 2.0 mm;
step four, manufacturing an optical fiber unit containing 2 optical fibers and manufacturing 6 optical fiber units and a central reinforcement unit into a combined cable core internal structure of a multi-optical fiber unit:
manufacturing two-core-number optical fiber units of an optical fiber sheath 3 with an oval cross section by using 2 tightly-sleeved optical fibers, simultaneously forming a V-shaped fiber stripping groove 4 on the outer side of the optical fiber sheath 3, and uniformly arranging 6 oval optical fiber units around a central reinforcement unit to manufacture the internal structure of the combined cable core; the process adopts a one-step forming die, and is formed by a 30 plastic extruding machine in one step, 6 optical fiber units are formed in one step, and a combined cable core internal structure with the 6 optical fiber units uniformly distributed around the central reinforcement unit is manufactured; (ii) a
The technological parameters of the two-core optical fiber unit with the oval cross section are as follows: ellipse minor axis: 1.5mm, major axis of ellipse: 1.8 mm;
step five, coating a cable core water-blocking tensile layer 7, a cable core coating layer 8 and an inner sheath 9 to manufacture a combined cable core;
1. and 7, coating a cable core water-blocking tensile layer:
adopt outside the aramid yarn that blocks water, make the tensile layer 7 that blocks water of cable core: the waterproof aramid fiber is parallelly arranged on the outer surface of the combined cable core structure through the active pay-off device and is coated on the inner structure of the combined cable core to form a cable core waterproof tensile layer 7;
2. and (3) coating a cable core coating layer 8:
a layer of low-smoke halogen-free material extruded by a 90-degree plastic extruding machine is used as a cable core coating layer 8, and a cable core water-blocking tensile layer 7 and the internal structure of the combined cable core are coated together;
3. coating the inner sheath 9:
extruding a layer of thermoplastic polyurethane elastomer rubber (TPU) sheath material outside the cable core cladding layer by a 90-degree extruding machine to be used as an inner sheath 9, and manufacturing the combined cable core with multiple optical fiber units;
technological parameters of the inner sheath and the combined cable core are as follows: the thickness of the inner sheath is 0.5mm, the outer diameter of the inner sheath is 6.2mm, and the outer diameter of the combined cable core is 6.2 mm;
step six, cladding the armor layer 10:
1. pressing the stainless steel wire into a metal band with uniform thickness and width by using a steel wire flattening mill;
2. the metal belt is prepared into a spiral stainless steel metal hose coated on an inner sheath of the combined cable core through a long-length automatic pipe making machine, the prepared stainless steel metal hose is used as an armor layer 10 to perform armor protection on an optical fiber unit of the combined cable core, and a gap of 0.3-0.4 mm is formed between the inner wall of the armor layer and the inner sheath;
the technological parameters of the armor layer are as follows: the outer diameter of the spiral stainless steel metal hose for armor is 7.6mm, the inner diameter is 6.9mm, and the spiral gap is 0.1-0.5 mm;
step seven, extruding the outer sheath 11:
a layer of thermoplastic polyurethane elastomer rubber (TPU) sheath material is extruded outside the armor layer by a 90-degree extruding machine to serve as an outer sheath 11, and the preparation of the novel field emergency optical cable with 6 optical fiber units, wherein each optical fiber unit contains 2 optical fibers and the number of optical fiber cores is 12;
outer sheath and optical cable process parameters: the thickness of the outer sheath: 1.5mm, outer diameter of optical cable: 10.6 mm.
The novel field operation emergency optical cable with 6 optical fiber units and 2 optical fibers contained in each optical fiber unit and 12 optical fiber cores is a field operation emergency optical cable with a typical structure of phi 10.6mm, wherein the optical fibers adopt a mode of bending-resistant single-mode optical fibers or bending-resistant multi-mode optical fibers or a mode of mixing the single-mode optical fibers and the multi-mode optical fibers, the outer diameter of the tight-buffered optical fibers is 0.5 +/-0.05 mm, and the number of the tight-buffered optical fibers is 12, wherein two optical fibers are one optical fiber unit, and the optical fiber units are of an oval structure with a short axis of 1.5mm and a long axis of 1.8 mm; the central reinforcement 5 is FRP of phi 1.0mm, the crowded bed course thickness of FRP is 0.5mm, the parallel aramid yarn that blocks water of filling up of combined cable core structure surface is as cable core tensile layer that blocks water, the inner sheath thickness of cable core is 0.5mm, the inner sheath external diameter is phi 6.2mm, the stainless steel metal armor hose internal diameter of metal armor is phi 6.9mm, external diameter phi 7.6mm, oversheath thickness is 1.5 mm.
The invention is suitable for the requirements of provincial and municipal communication special offices, armies, radio and television and other places, is also suitable for rapid wiring or repeated winding and unwinding of military field communication systems, and is also suitable for emergency situations such as rapid wiring of individual soldiers of the armies, vehicle-mounted wiring, broadcast television relay emergency repair, temporary communication systems, local area network wiring, machine room debugging, emergency wiring of lines in disaster relief areas and the like.
Claims (10)
1. A novel field emergency optical cable is characterized in that 1-2 or 3-4 mutually parallel tight-sleeved optical fibers are coated by an optical fiber sheath (3) with an oval cross section to form an optical fiber unit with the oval cross section, 6-8 optical fiber units are uniformly distributed around the central reinforcement unit by taking the central reinforcement unit as the center, and an internal structure of a multi-optical fiber unit combined cable core with the optical fiber units uniformly distributed around the central reinforcement unit is formed;
the tight-buffered optical fiber is an optical fiber of which the outer surface of a colored optical fiber (1) is coated with a tight-buffered layer (2), the central reinforcing part unit is a central reinforcing part unit with a circular cross section, which is formed by extruding a non-metal reinforcing part extrusion cushion layer (6) on the surface of a non-metal central reinforcing part (5) with a circular cross section, and the reinforcing part extrusion cushion layer (6) is a buffer layer of the central reinforcing part;
a longitudinal fiber stripping groove (4) is formed in the outer surface of an optical fiber sheath (3) with an oval cross section of each optical fiber unit, and a cable core water-blocking tensile layer (7), a cable core coating layer (8) and an inner sheath (9) are sequentially coated on the outer surface of the inner structure of the multi-optical fiber unit combined cable core from inside to outside to form the multi-optical fiber unit combined cable core; armor (10) cladding is on inner sheath (9), and oversheath (11) cladding constitutes a novel emergent optical cable of field operations on armor (10).
2. The novel field emergency optical cable according to claim 1, wherein the colored optical fiber (1) is a bend-resistant optical fiber which is colored, and the optical fiber is identified by a color spectrum.
3. A novel field emergency optical cable according to claim 1, wherein the tight-buffered layer (2) is a layer of acrylic resin coated on the colored optical fiber (1) by means of uv curing, or a layer of nylon, low smoke halogen-free, polyvinyl chloride or thermoplastic polyurethane elastomer rubber extruded on the colored optical fiber (1) by means of an extruder.
4. The novel field emergency optical cable according to claim 1, wherein the optical fiber sheath (3) with the oval cross section is an extruded tight-buffered optical fiber inner sheath, the optical fiber sheaths (3) of 6-8 optical fiber units are simultaneously extruded and formed in the same die, and when the optical fiber sheath (3) is extruded, the outer side surface of the optical fiber sheath (3) forms a longitudinal V-shaped fiber stripping groove (4).
5. A novel field emergency optical cable according to claim 1, wherein the material of the central reinforcement member (5) is a fiber reinforced composite material or kevlar fiber reinforced plastic, and the material of the reinforcement extrusion cushion layer (6) is nylon material, low smoke halogen-free material, polyvinyl chloride or thermoplastic polyurethane elastomer rubber.
6. The novel field emergency optical cable according to claim 1, wherein the cable core water-blocking tensile layer (7) is made of water-blocking aramid yarns, and the cable core water-blocking tensile layer (7) is structured such that the water-blocking aramid yarns are parallelly placed on the outer surface of the inner structure of the multi-fiber unit combined cable core formed by 6-8 fiber units and a central reinforcement unit, or one layer of water-blocking aramid yarns is stranded on the outer surface of the inner structure of the multi-fiber unit combined cable core in a spiral stranding manner.
7. A novel field emergency optical cable according to claim 1, wherein the cable core cladding (8) is an extruded low smoke zero halogen layer.
8. A novel field emergency optical cable according to claim 1, wherein the inner sheath (9) and the outer sheath (11) are made of thermoplastic polyurethane elastomer rubber sheath material, the inner sheath (9) is made of thermoplastic polyurethane elastomer rubber layer extruded on the cable core cladding (8), and the outer sheath (11) is made of thermoplastic polyurethane elastomer rubber layer extruded on the armor layer (10) and cladding the armor layer (10).
9. The novel field emergency optical cable according to claim 1, wherein the armor layer (10) is a metal hose armor layer, and the material of the armor layer (10) is a metal stainless steel spiral pipe.
10. A method for preparing a novel field emergency optical cable, which is characterized in that the method for preparing the novel field emergency optical cable according to claim 9 comprises the following steps:
the following is a preparation method of a novel field emergency optical cable with 6 optical fiber units and 2 optical fibers contained in each optical fiber unit, wherein the number of the optical fibers is 12, and the preparation method of the novel field emergency optical cable with other optical fiber units or optical fiber units containing other optical fiber cores in the range of 1-4 is the same as the method described in the claims and is also within the protection range of the claims;
the first, main process equipment:
the device comprises a high-speed optical fiber coloring machine, a 30 plastic extruding machine, a 90 plastic extruding machine, a wrapping machine, a steel wire flattening machine and a long-scale automatic pipe making machine;
secondly, the preparation process comprises the following steps:
step one, manufacturing a colored optical fiber (1):
coloring the selected bending-resistant optical fiber in a high-speed optical fiber coloring machine to prepare a colored optical fiber (1), wherein the optical fiber is marked by a chromatogram;
step two, coating a tight-buffered layer (2) on the colored optical fiber (1) to manufacture the tight-buffered optical fiber:
coating a layer of acrylic resin on the colored optical fiber (1) in an ultraviolet curing mode to form a tight-buffered optical fiber as a tight-buffered layer (2); or extruding a layer of nylon material, low-smoke halogen-free material, polyvinyl chloride or thermoplastic polyurethane elastomer rubber as a tight-buffered layer (2) on the colored optical fiber (1) by a 30-plastic extruding machine to prepare the tight-buffered optical fiber;
the technological parameters of the tight-buffered optical fiber are as follows: the outer diameter of the colored optical fiber coated with the tight-buffered layer (2), namely the outer diameter of the tight-buffered optical fiber, is 0.5 +/-0.05 mm;
step three, manufacturing a central reinforcement unit:
extruding a layer of nylon material, low-smoke halogen-free material, polyvinyl chloride or thermoplastic polyurethane elastomer rubber as a nonmetallic reinforcing member extrusion cushion layer (6) on the surface of a nonmetallic central reinforcing member (5) with a circular cross section and made of fiber reinforced composite material or Kevlar fiber reinforced plastic by using a 90-degree extruding machine, and compounding the reinforcing member extrusion cushion layer (6) and the central reinforcing member (5) to form a central reinforcing member unit with a circular cross section;
central stiffener unit process parameters of circular cross section: the diameter of the core layer, namely the diameter of the central reinforcing piece (5), is 1.0mm, the thickness of the cushion extrusion layer, namely the thickness of the cushion extrusion layer (6) of the reinforcing piece is 0.5mm, and the outer diameter of the central reinforcing piece unit is 2.0 mm;
step four, manufacturing an optical fiber unit containing 2 optical fibers and manufacturing 6 optical fiber units and a central reinforcement unit into an internal structure of the multi-optical fiber unit combined cable core:
manufacturing two-core-number optical fiber units of an optical fiber sheath (3) with an oval cross section by using 2 tightly-sleeved optical fibers, simultaneously forming a V-shaped fiber stripping groove (4) on the outer side of the optical fiber sheath (3), and uniformly arranging 6 oval optical fiber units around a central reinforcement unit to manufacture the internal structure of the multi-optical fiber unit combined cable core; the process adopts a one-step forming die, and is formed by a 30 plastic extruding machine in one step, 6 optical fiber units are formed in one step, and an internal structure of the multi-optical fiber unit combined cable core with the 6 optical fiber units uniformly distributed around the central reinforcement unit is manufactured;
the technological parameters of the two-core optical fiber unit with the oval cross section are as follows: ellipse minor axis: 1.5mm, major axis of ellipse: 1.8 mm;
fifthly, coating a cable core water-blocking tensile layer (7), a cable core coating layer (8) and an inner sheath to manufacture a multi-optical fiber unit combined cable core;
1) and (3) coating a cable core water-blocking tensile layer (7):
the waterproof aramid yarn is coated outside the combined cable core structure, and two methods are adopted for manufacturing the cable core waterproof tensile layer (7): the waterproof aramid yarn is fully placed on the outer surface of the multi-optical-fiber-unit combined cable core structure in parallel through an active pay-off device, or the waterproof aramid yarn is wrapped on the inner structure of the multi-optical-fiber-unit combined cable core through a wrapping machine in a spiral twisting mode;
2) coating a cable core coating layer (8):
a layer of low-smoke halogen-free material extruded by a 90-degree plastic extruding machine is used as a cable core coating layer (8), and a cable core water-blocking tensile layer (7) and the internal structure of the multi-optical-fiber unit combined cable core are coated together;
3) coating the inner sheath (9):
extruding a layer of thermoplastic polyurethane elastomer rubber sheath material outside the cable core coating layer (8) by a 90-degree extruding machine to be used as an inner sheath (9) to manufacture the multi-optical-fiber unit combined cable core;
the process parameters of the inner sheath and the multi-fiber unit combined cable core are as follows: the thickness of the inner sheath is 0.5mm, the outer diameter of the inner sheath is 6.2mm, and the outer diameter of the multi-fiber unit combined cable core is 6.2 mm;
step six, cladding the armor layer (10):
1) pressing the stainless steel wire into a metal band with uniform thickness and width by using a steel wire flattening mill;
2) the metal belt is prepared into a spiral stainless steel metal hose coated on an inner sheath of the combined cable core through a long-length automatic pipe making machine, the prepared stainless steel metal hose is used as an armor layer (10) to perform armor protection on optical fiber units of the multi-optical-fiber-unit combined cable core, and a gap of 0.3-0.4 mm is formed between the inner wall of the armor layer (10) and the inner sheath;
the process parameters of the armor layer (10) are as follows: the outer diameter of the stainless steel metal hose for armor is 7.6mm, the inner diameter is 6.9mm, and the spiral gap is 0.1-0.5 mm;
seventhly, extruding the outer sheath (11):
a layer of thermoplastic polyurethane elastomer rubber sheath material is extruded outside the armor layer by a 90-degree extruding machine to be used as an outer sheath (11), so that the preparation of the novel field emergency optical cable with 6 optical fiber units, each optical fiber unit contains 2 optical fibers, and the number of the optical fiber cores is 12;
outer sheath and optical cable process parameters: the thickness of the outer sheath: 1.5mm, outer diameter of optical cable: 10.6 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114002795A (en) * | 2021-12-03 | 2022-02-01 | 安徽光纤光缆传输技术研究所(中国电子科技集团公司第八研究所) | Flexible metal armored field operation optical cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114002795A (en) * | 2021-12-03 | 2022-02-01 | 安徽光纤光缆传输技术研究所(中国电子科技集团公司第八研究所) | Flexible metal armored field operation optical cable |
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Application publication date: 20210330 |