CN210348009U - Rat-proof optical cable with novel structure - Google Patents
Rat-proof optical cable with novel structure Download PDFInfo
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- CN210348009U CN210348009U CN201921290065.9U CN201921290065U CN210348009U CN 210348009 U CN210348009 U CN 210348009U CN 201921290065 U CN201921290065 U CN 201921290065U CN 210348009 U CN210348009 U CN 210348009U
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Abstract
The utility model discloses a novel protection against rodents optical cable of structure and manufacturing method thereof mainly includes many loose tubes, the loose tube sets up many optic fibre, fill the water blocking layer in the loose tube, the loose tube evenly arranges along central reinforcement periphery circle, many loose tubes twine around the package tape bundle yarn layer with the whole outside of central reinforcement, the package tape is pricked the yarn layer outside and is still wrapped up the metal armor, metal armor outside extrusion molding outer jacket, it is protruding to set up a plurality of arcuations on the outer jacket, this protection against rodents optical cable structural design science is difficult for being gnawed by the rodent and stings, frictional force is little, and construction cloth is put convenience, the optical cable is crooked not influenced and the quality is light, production and processing is simple and easy.
Description
Technical Field
The patent of the utility model relates to a communication transmission cable field especially relates to a protection against rodents optical cable of novel structure and manufacturing method thereof.
Background
With the implementation of the strategy of 'broadband China', the broadband network is expected to cover the urban and rural areas completely in 2020, the popularity of fixed broadband families reaches 70%, and the proportion of the broadband of the village of administrative department exceeds 98%. Because of the wide range of the population in China, a large number of murine animals are often bred and survive in the areas with luxuriant vegetation and better natural conditions. Being a powerful rodent, the incisors of which are very developed and grow continuously, rodents typically have the habit of biting through an object to keep their teeth sharp and of a suitable length. When the optical cable laid in the field or in the building pipeline becomes an object bitten by rodent, the protective layer of the optical cable and even the cable core are easily damaged, thereby causing the interruption of the optical cable path and bringing serious influence to the stable operation of communication service and network maintenance.
Although the existing ordinary armored optical cable has a metal protective layer which can prevent the gnawing of rodent to a certain extent, research shows that once the metal armored layer of the optical cable is bitten, the exposed metal layer is easy to generate chemical corrosion reaction with the external environment, so that the optical cable is completely deprived of the rat-proof capability. And when the protective sleeve is added with a reagent which is aversive to rodents or has fatal effects on the rodents to achieve the purpose of rat prevention, the reagent volatilizes and loses efficacy or brings certain environmental pollution.
Although the hard pipeline is adopted for protection, when the pipeline gap is too large, the rodent is difficult to avoid, and in addition, the pipeline with proper size is additionally customized, so that the optical cable laying cost is greatly increased. And a series of problems that the laying construction difficulty of the pipeline is large and the like under the complex environment.
Chinese patent CN104503051A discloses a rat bite prevention steel tape armored optical cable, which comprises a metal hose; two optical fibers which are arranged in parallel are arranged in the metal hose; the outer surface of each optical fiber is sequentially sleeved with a first aramid fiber and an optical cable inner sheath; the outer surface of the metal hose is sequentially sleeved with a metal woven mesh, a second aramid fiber and an optical cable outer sheath; utilize metal collapsible tube, metal mesh grid, second aramid fiber and optical cable oversheath to form protection against rodents in this patent and sting the structure, the holistic bending nature of optical cable receives the influence to because coefficient of surface friction is great, consequently difficult cloth is put. And once the metal armor is damaged, the rat-proof capability is completely lost due to the chemical corrosion effect.
Therefore, how to develop an efficient and low-cost rat-proof optical cable is a difficult problem for optical cable manufacturers and communication operators.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a structural design science is difficult for being gnawed by rodent and stings, frictional force is little, and the construction is laid convenience, the crooked not influenced and quality of optical cable is light, production and processing is simple and easy protection against rodents optical cable and manufacturing method of a novel structure.
In order to realize the purpose of the utility model, the technical proposal of the utility model is that:
the utility model provides a rat-proof optical cable of novel structure, mainly includes many loose tubes, the loose intraductal many optic fibre that sets up of cover, the intussuseption of loose tube intussuseption water-blocking layer, loose tube evenly arranges along central reinforcement periphery circle, many loose tubes twine around band tape bundle yarn layer with the whole outside of central reinforcement, the metal armor is still wrapped up in the band tape bundle yarn layer outside, metal armor outside extrusion molding outer jacket, it is protruding to set up a plurality of arcuations on the outer jacket.
Furthermore, a plurality of filling ropes are arranged between the central reinforcing piece and the loose tube, and optical cable paste is filled among the central reinforcing piece, the loose tube and the filling ropes.
Furthermore, a tearing rope is further arranged on the wrapping tape yarn binding layer.
Further, the water-blocking layer is water-blocking ointment or water-blocking yarn.
Further, the outer protective layer is a polyolefin sheath layer coated with hot-melt adhesive on the surface.
Furthermore, the arc-shaped bulge is a micro glass bead which is half embedded into the outer protective layer.
Furthermore, the shape of the micro glass bead is circular, and the diameter of the micro glass bead is 0.4 mm-0.75 mm.
Further, the shape of the micro glass beads is embedded into the outer protective layer to a depth greater than or equal to the radius of the micro glass beads or the hollow nylon.
A manufacturing method of a rat-proof optical cable with a novel structure mainly comprises the following steps:
the method comprises the following steps: according to the existing production process, the loose tube, the optical fibers and the water-blocking layer are produced into the conventional layer-stranded optical cable, then the conventional layer-stranded optical cable is uniformly distributed on the periphery of the central reinforcement, and then optical cable paste, a wrapping tape binding yarn layer and a metal armor layer are filled on the outer sides of the conventional layer-stranded optical cable and the central reinforcement according to the existing production process to form the metal armor layer-stranded optical cable;
step two: extruding an outer protective layer on the outer wall of the metal armor layer stranded optical cable, and coating a hot-melt adhesive on the surface of the outer protective layer which is extruded and not cooled in the extrusion molding process of the outer protective layer;
step three: passing the outer protective layer coated with the hot melt adhesive through a hopper filled with micro glass beads; the micro glass beads are uniformly adhered to the outer protective layer through a sizing die, and then the micro glass beads are uniformly and semi-embedded into the outer protective layer through a horn-shaped extrusion die, so that the adhesion uniformity and firmness of the micro glass beads are ensured; and cooling and shaping the outer protective layer embedded with a large number of micro beads through a hot water tank and a cold water tank.
Further, the processes of extrusion molding of the outer protective layer, coating of the hot melt adhesive, adhesion of the micro glass beads and extrusion embedding are in-line continuous production.
Furthermore, the size of the die orifice of the sizing die is increased by 0.8 mm-1.5 mm on the basis of the outer diameter of the outer protective layer.
Furthermore, the size of the die orifice of the horn-shaped extrusion die is increased by 0.4 mm-0.75 mm on the basis of the outer diameter of the outer protective layer.
The utility model has the advantages that:
the utility model discloses compare with traditional protection against rodents optical cable, there are several characteristics as follows:
1. the glass beads have high hardness and smooth surfaces: by utilizing the advantage of high hardness of the glass beads, the Mohs hardness of general glass is 6.5-7.8, the hardness of the thin steel sheet is 5.5, and the glass beads are smooth in surface, so that the optical cable is not easy to be bitten by rodents;
2. the friction is little, and the construction is laid conveniently: a large number of micro glass beads are embedded in the surface of the outer protective layer, so that on one hand, the surface friction coefficient of the rat-proof optical cable is reduced by utilizing the hard and smooth surface of the micro glass beads, and meanwhile, the arc-shaped convex surface of the micro glass beads forms point contact surfaces with the ground and the pipeline, so that the contact area of the rat-proof optical cable with the ground and the pipeline is reduced, the friction force in the laying process of the rat-proof optical cable is integrally reduced, and the integral construction laying is more convenient;
3. optical cable bending is not affected and the quality is light: compared with other rat-proof optical cables, the rat-proof optical cable only has the advantages that a large number of micro glass beads are embedded in the outer protective layer, the bending performance of the optical cable is basically not influenced, and compared with other hard protective layers or optical cables with protective tubes, the rat-proof optical cable has obvious advantages in the aspect of bending performance, is easier to construct and lay, is lighter in overall mass and is convenient to construct and drag and drop;
4. the production and processing are simple: the rat-proof optical cable only needs to be additionally provided with hot melt adhesive coating equipment, a miniature glass bead hopper, a sizing die and a horn-shaped extrusion die on outer protective layer production equipment, has low additional equipment cost and simple structure, does not influence the continuity of production, and is a low-cost and high-efficiency production and processing mode.
Drawings
Figure 1 is a cross-sectional view of the present invention.
Fig. 2 is a longitudinal sectional view of the present invention.
In the figure: the cable comprises a loose tube 1, an optical fiber 2, a water-resistant layer 3, a central reinforcing member 4, a band-bound yarn layer 5, a metal armor layer 6, an outer protective layer 7, an arc-shaped bulge 8, a filling rope 9, a cable paste 10 and a tearing rope 11.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
The utility model provides a rat-proof optical cable of novel structure, mainly includes many loose tubes 1, set up many optic fibre 2 in the loose tube 1, fill the water blocking layer 3 in the loose tube 1, loose tube 1 evenly arranges along 4 periphery circles of central reinforcement, many loose tubes 1 twine around band-tie yarn layer 5 with 4 whole outsides of central reinforcement, the metal armor 6 is still wrapped up in the band-tie yarn layer 5 outside, 6 outside extrusion molding outer jacket 7 of metal armor, set up the protruding 8 of a plurality of arcuations on the outer jacket 7.
Further, a plurality of filling ropes 9 are arranged between the central reinforcing member 4 and the loose tube 1, and optical cable paste 10 is filled among the central reinforcing member 4, the loose tube 1 and the filling ropes 9.
Furthermore, a tearing rope 11 is arranged on the bundling and binding layer 5.
Further, the water-blocking layer 3 is water-blocking ointment or water-blocking yarn.
Further, the outer protective layer 7 is a polyolefin sheath layer coated with a hot-melt adhesive on the surface, and to ensure the adhesion between the hot-melt adhesive and the outer protective layer, EEA (ethylene-ethyl acrylate copolymer) with an ethyl acrylate content of about 23% is generally selected, and other ethylene and its copolymer hot-melt adhesives with high temperature resistance and strong adhesion can also be selected.
Further, the arc-shaped protrusion 8 is a micro glass bead half-embedded in the outer protective layer 7.
Furthermore, the shape of the micro glass bead is circular, and the diameter of the micro glass bead is 0.4 mm-0.75 mm.
Further, the shape of the micro glass beads is embedded in the outer sheath 7 to a depth greater than or equal to the radius of the micro glass beads.
A manufacturing method of a rat-proof optical cable with a novel structure mainly comprises the following steps:
the method comprises the following steps: according to the existing production process, the loose tube 1, the optical fibers 2 and the water-blocking layer 3 are produced into a conventional layer stranded optical cable, then the conventional layer stranded optical cable is uniformly distributed on the periphery of the central reinforcing part 4, and then optical cable paste 10, a wrapping tape binding layer 5 and a metal armor layer 6 are filled on the outer sides of the conventional layer stranded optical cable and the central reinforcing part 4 integrally according to the existing production process to form a metal armor layer stranded optical cable; the conventional layer-stranded optical cable and the metal armor layer-stranded optical cable are both the prior art, and the production process is also the prior art;
step two: extruding an outer protective layer 7 on the outer wall of the metal armor layer stranded optical cable, and coating a hot-melt adhesive on the surface of the outer protective layer 7 which is not cooled in the extrusion molding process of the outer protective layer 7;
step three: passing the outer sheath 7 coated with the hot melt adhesive through a hopper filled with micro glass beads; the micro glass beads are uniformly adhered to the outer protective layer 7 through a sizing die, and then the micro glass beads are uniformly and semi-embedded into the outer protective layer 7 through a horn-shaped extrusion die, so that the adhesion uniformity and firmness of the micro glass beads are guaranteed; then cooling and shaping the outer protective layer 7 embedded with a large amount of micro glass beads through a hot water tank and a cold water tank;
further, the extrusion molding of the outer protective layer 7, the coating of the hot melt adhesive, the adhesion of the micro glass beads and the extrusion embedding process are in online continuous production in sequence;
furthermore, the size of the die orifice of the sizing die is increased by 0.8 mm-1.5 mm on the basis of the outer diameter of the outer protective layer 7;
furthermore, the size of the die orifice of the horn-shaped extrusion die is increased by 0.4 mm-0.75 mm on the basis of the outer diameter of the outer protective layer 7.
Sizing mould and horn type extrusion die all are the conventional mould that traditional cable extrusion processing was processed, and the specific size of mould is according to this patent requirement customization. The optical cable with the outer protective layer 7 coated with the hot-melt adhesive passes through the middle part of a hopper filled with the micro glass beads, holes are formed in two sides of the middle part of the hopper, and the hole diameter of each hole can be adjusted according to the outer diameter of the optical cable. After the optical cable passes through the hopper, the optical cable outer protective layer 7 shows that a large number of miniature glass beads can be adhered, and redundant miniature glass beads adhered are scraped off when passing through the sizing die, so that the surface of the optical cable outer protective layer 7 is ensured to be only uniformly adhered with a layer of miniature glass beads, and the size of a die opening of the sizing die needs to be increased by 0.8 mm-1.5 mm on the basis of the outer diameter of the outer protective layer 7. The optical cable adhered with the layer of the micro glass beads passes through the horn-shaped extrusion die, and aims to gradually extrude the micro glass beads to be half embedded into the outer protective layer 7, so that the micro glass beads are tightly wedged with the optical cable outer protective layer 7, and in order to ensure that the part of the micro glass beads larger than or equal to half is embedded into the optical cable outer protective layer 7, the size of a die opening of the horn-shaped extrusion die needs to be increased by 0.4 mm-0.75 mm on the basis of the outer diameter of the outer protective layer 7.
The loose tube 1 of the utility model adopts the conventional polybutylene terephthalate (PBT for short) or other suitable plastics. The performance of the PBT material is in accordance with YD/T1118.1 part 1 of the secondary coating material for optical fibers: polybutylene terephthalate regulations.
The water-blocking ointment or water-blocking yarn and the optical cable ointment 10 are materials for conventional optical cables. The water-blocking ointment should conform to YD/T839.2 "third part of filling and coating compound for communication cables and cables: stipulation of fiber paste; the cable paste 10 should conform to YD/T839.3 third part of filling and coating compound for telecommunication cables: stipulation of Cable paste "; the water-blocking yarn should conform to YD/T1115.2 second part of the water-blocking material for the communication cable and the optical cable: water blocking yarn.
The steel strip armor layer 6 is a steel-plastic composite strip, and is a double-sided steel-plastic composite strip which is specified in the steel-plastic composite strip of the third part of the metal-plastic composite strip for the YD/T723.3 (for communication cable and optical cable). Wherein the nominal thickness of the steel strip is 0.15 mm and the nominal thickness of the plastic composite layer is 0.05 mm.
The outer protective layer 7 of the utility model is made of high-density polyolefin material and meets the requirements of GB/T15065-added black polyethylene plastic for electric wires and cables. The outer sheath 7 has an average thickness of not less than 1.6 mm and a minimum thickness of not less than 1.5 mm.
The micro glass beads of the utility model are spheres with an outer diameter of 0.4 mm-0.75 mm, wherein the beads which are not round or are adhered are less than 10% of the mass of the beads. The selected micro glass beads can meet the requirements of GB/T24722-2009 glass beads for road marking, and the density is as follows: 2.4 g/cm3~4.3 g/cm3。
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a rat-proof optical cable of novel structure, mainly includes many loose tubes (1), set up many optic fibre (2) in loose tube (1), pack water-blocking layer (3) in loose tube (1), loose tube (1) is evenly arranged along central reinforcement (4) periphery circle, its characterized in that: many loose tubes (1) twine around band tape binder layer (5) with the whole outside of central reinforcement (4), band tape binder layer (5) outside is still wrapped up metal armor (6), metal armor (6) outside extrusion molding outer jacket (7), set up a plurality of arcuation archs (8) on outer jacket (7).
2. The ratproof optical cable with a novel structure as claimed in claim 1, wherein: a plurality of filling ropes (9) are further arranged between the central reinforcing piece and the loose tube, and optical cable paste (10) is filled among the central reinforcing piece (4), the loose tube (1) and the filling ropes (9).
3. The ratproof optical cable with a novel structure as claimed in claim 1, wherein: the wrapping band yarn binding layer (5) is also provided with a tearing rope (11).
4. The ratproof optical cable with a novel structure as claimed in claim 1, wherein: the water-resistant layer (3) is water-resistant ointment or water-resistant yarn.
5. The ratproof optical cable with a novel structure as claimed in claim 1, wherein: the outer protective layer (7) is a polyolefin sheath layer coated with hot-melt adhesive on the surface.
6. The ratproof optical cable with a novel structure as claimed in claim 1, wherein: the arc-shaped bulge (8) is a micro glass bead which is half embedded into the outer protective layer (7).
7. The ratproof optical cable with a novel structure as claimed in claim 6, wherein: the shape of the micro glass bead is circular, and the diameter is 0.4 mm-0.75 mm.
8. The ratproof optical cable of claim 6 or 7, which is characterized in that: the depth of the shape of the micro glass beads embedded into the outer protective layer (7) is larger than or equal to the radius of the micro glass beads.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921290065.9U CN210348009U (en) | 2019-08-10 | 2019-08-10 | Rat-proof optical cable with novel structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921290065.9U CN210348009U (en) | 2019-08-10 | 2019-08-10 | Rat-proof optical cable with novel structure |
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| CN210348009U true CN210348009U (en) | 2020-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361821A (en) * | 2019-08-10 | 2019-10-22 | 江苏俊知技术有限公司 | A kind of new structural rodent-resistant cable and its manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110361821A (en) * | 2019-08-10 | 2019-10-22 | 江苏俊知技术有限公司 | A kind of new structural rodent-resistant cable and its manufacturing method |
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Assignee: JIANGSU TRIGIANT OPTOELECTRONIC TECHNOLOGY Co.,Ltd. Assignor: JIANGSU TRIGIANT TECHNOLOGY Co.,Ltd. Contract record no.: X2022980004367 Denomination of utility model: A new type of rat proof optical cable Granted publication date: 20200417 License type: Common License Record date: 20220418 |