CN113897008B - Water-laid armored optical cable, optical cable laying method, water-soluble resin and application - Google Patents
Water-laid armored optical cable, optical cable laying method, water-soluble resin and application Download PDFInfo
- Publication number
- CN113897008B CN113897008B CN202111246302.3A CN202111246302A CN113897008B CN 113897008 B CN113897008 B CN 113897008B CN 202111246302 A CN202111246302 A CN 202111246302A CN 113897008 B CN113897008 B CN 113897008B
- Authority
- CN
- China
- Prior art keywords
- water
- soluble
- optical cable
- layer
- sheath
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- 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
-
- 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
- G02B6/4438—Means specially adapted for strengthening or protecting the cables for facilitating insertion by fluid drag in ducts or capillaries
-
- 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
- G02B6/4486—Protective covering
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Abstract
The invention discloses a water-laid armored optical cable, an optical cable laying method, water-soluble resin and application. The armored optical cable is provided with a water-soluble layer on the surface of the waterproof outer sheath of the armored optical cable; the water-soluble layer is made of water-soluble resin, and the kinematic viscosity of the saturated water solution is 60-110 mm 2 And s. Adopting water flow to lay the water laid armored optical cable in a pipeline; the water flow speed is controlled between 40 and 50m/min and between 40 and 55L/min. The dissolving time of the water-soluble resin is 3-10min at normal temperature, and the kinematic viscosity of the saturated aqueous solution is 60-110 mm 2 And the oil balance value is 17-22, and the water-soluble layer is applied to forming a water-laid armored optical cable water-soluble layer. The invention reduces the friction force between the sheath layer of the optical cable and the inner wall of the pipeline and improves the laying distance of the optical cable in the water laying pipeline. The sheath layer is prevented from being scratched and punctured in the process of installing the optical cable, the surface quality of the optical cable installation sheath is improved, and the integrity of the inside of the cable core is guaranteed.
Description
Technical Field
The invention belongs to the field of communication optical fiber cables, and particularly relates to a water-laid armored optical cable, water-soluble resin and application.
Background
In the pipeline water laying process, the airflow in the air blowing process is replaced by high-speed water flow, and the water flow has buoyancy effect on the optical cable, so that the friction force between the optical cable and the inner wall of the pipeline can be reduced, and the laying distance of the optical cable is increased by about 100 percent compared with the air blowing optical cable, but for long-distance pipeline laying, for example: 6km or 10km, the distance for laying the optical cable in water is difficult to achieve.
In order to allow longer runs of optical cable, some methods have been used to further reduce the friction between the cable and the inner wall of the duct by adjusting the density of the cable. However, the method has great limitations on the type selection and structure of the optical cable, and cannot effectively expand the types and applications of the water-laid optical cable.
The armored optical cable has the characteristics of tensile strength, lateral pressure resistance and strong impact resistance, and has important application in telecommunication optical fiber long-distance lines and primary and secondary trunk line transmission.
Disclosure of Invention
The invention provides a water-laid armored optical cable, water-soluble resin and application thereof, aiming at solving the technical problems that the friction between an optical cable and the inner wall of a pipeline in the water laying process is large, the laying distance is short and the surface of an optical cable sheath is damaged when the armored optical cable is laid in the prior art, by adding the water-soluble resin on the surface of the outer sheath of the armored optical cable, the friction between the optical cable and the inner wall of the pipeline is reduced.
To achieve the above object, according to one aspect of the present invention, there is provided a water-laid armored optical cable having a water-soluble layer on a surface of a water-proof outer sheath of the armored optical cable; the water-soluble layer is made of water-soluble resin, and the kinematic viscosity of the saturated water solution is 60-110 mm 2 /s。
Preferably, the solubility of the water-soluble resin in the water-laid armored optical cable is 85-95%, the dissolution time at room temperature is 3-10min, and the oil balance value is 17-22.
Preferably, the water-laid armored optical cable has the following water-soluble resin in parts by mass: 10 to 20 percent of polyethylene glycol, 50 to 75 percent of polyvinyl alcohol, 5 to 20 percent of cellulose acetate, 1 to 5 percent of sodium polyacrylate and 1 to 5 percent of potassium polyacrylate.
Preferably, the water-laid armored optical cable has a thickness of the water-soluble layer along the radial direction of the sheath layer of 10-30% of the maximum radial thickness of the sheath layer, and a cross-sectional area of the water-soluble layer is 5-20% of the whole area of the sheath.
Preferably, the water-laid armored optical cable is characterized in that the water-soluble layers are continuously arranged or alternately and symmetrically arranged in the longitudinal direction of the optical cable.
Preferably, the water-soluble layer of the water-laid armored optical cable is continuously arranged or alternately and symmetrically arranged in the longitudinal direction of the optical cable, the outer edge of the cross-sectional structure of the water-soluble layer is flush with the outer edge of the optical cable sheath, and a groove is left on the surface of the sheath after the water-soluble layer is dissolved.
Preferably, the water-laid armored optical cable is provided with 8, 16 and 32 layers; the central included angle between the layers can be 45 degrees, 22.5 degrees and 11.25 degrees; the cross section of the material is preferably of a special-shaped structure and can be in an inverted cone shape, a long strip shape, an inverted trapezoid shape, a semicircular shape, a semi-elliptical shape and a semi-rhombic shape.
According to another aspect of the present invention, there is provided an optical cable laying method of laying a water-laid armored optical cable provided by the present invention in a pipeline using a water current; controlling the water flow speed between 40 and 50m/min and the water flow speed between 40 and 55L/min.
According to another aspect of the present invention, there is provided a water-soluble resin having a dissolution time of 3 to 10min (23 ℃) at normal temperature and a kinematic viscosity of a saturated aqueous solution of 60 to 110mm 2 (ii)/s, oil balance (HLB) of 17 to 22; preferably contains in parts by mass: 10 to 20 percent of polyethylene glycol, 50 to 75 percent of polyvinyl alcohol, 5 to 20 percent of cellulose acetate, 1 to 5 percent of sodium polyacrylate and 1 to 5 percent of potassium polyacrylate.
According to another aspect of the invention, the application of the water-soluble resin is provided, which is applied to forming a water-soluble layer of a water-laid armored cable.
Preferably, the water-soluble resin is prepared by extruding the water-soluble resin from an extrusion head, wherein the extrusion melting temperature is 160-200 ℃; preferably, the water-soluble resin and the armored cable outer sheath are simultaneously extruded and prepared by a co-extrusion machine head.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
the armored optical cable with the water-soluble layer adopts the water-soluble resin mixture, the resin mixture is directionally released between the optical cable sheath and the inner wall of the pipeline in the water laying process, slowly released in the optical cable laying process and dissolved and reacted with high-speed water flow in the pipeline to form a water mixed solution, and meanwhile, the water mixed solution in the pipeline has a certain kinematic viscosity value, so that the lubricity of the water mixed solution can be improved, the friction force between the sheath layer of the optical cable sheath and the inner wall of the pipeline is reduced, and the laying distance of the optical cable in the water laying pipeline is increased.
During the water laying process, the density of the water mixed solution in the pipeline is increased to 1.0g/cm 3 Above, the concentration is 1.03-1.15 g/cm 3 Can match the density of armored optical cables and provide larger buoyancy, thereby improving the suspension filling of the optical cables and meeting the laying requirements of long-distance pipelines, such as: 6km, 10km, etc.
According to the invention, the water-soluble resin in the water lubricating layer is directionally released into the pipeline, so that the contact probability of the optical cable sheath layer and the inner wall of the pipeline is reduced, the scratching, puncturing and the like of the sheath layer in the optical cable installation process can be avoided, the surface quality of the optical cable installation sheath is improved, and the integrity of the inside of the cable core is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of a continuously disposed water-soluble layer of the present invention;
FIG. 2 is a schematic diagram of the structure of water-soluble layers of the present invention arranged in an alternating symmetrical arrangement;
fig. 3 is a schematic view of a structure of a water-laid armored optical cable provided in embodiment 1 of the present invention;
fig. 4 is a schematic view of a water-laid armored optical cable structure provided in embodiment 2 of the present invention;
fig. 5 is a schematic structural view of a water-laid armored optical cable provided in embodiment 3 of the present invention;
fig. 6 is a schematic view of a water-laid armored optical cable structure provided in embodiment 4 of the present invention;
fig. 7 is a schematic view of a structure of a water-laid armored optical cable provided in embodiment 5 of the present invention;
fig. 8 is a schematic structural view of a water-laid armored optical cable provided in embodiment 6 of the present invention.
The same reference numbers will be used throughout the drawings to refer to the same elements or structures, wherein: i is a water-soluble layer, II is a sheath layer, III is a water-blocking tape, IV is a sleeve, V is a water-blocking filler, VI is an optical fiber, VII is a reinforcing piece, and VIII is a metal belt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The armored optical cable is formed by wrapping a protective armor layer outside an optical fiber, and is mainly used for meeting the requirements of a client on rat bite prevention, moisture prevention and the like. In the tunnel, when the laying length of the pipeline is 10km and 12km, in order to improve the installation and conveying length of the optical cable, the optical cable needs to bear larger propelling force in a propeller so as to overcome the resistance of the front end of the optical cable. However, such a pushing force acts on the optical fiber cable, and when the pushing force is greater than the tensile strength (tensile resistance) of the optical fiber cable, the optical fiber cable is overstretched, so that the optical fiber in the optical fiber cable is subjected to partial extrusion force, the attenuation of the optical fiber exceeds the standard, and even the optical fiber is broken. Therefore, in long-distance transmission, armored optical cables with higher optical cable density, higher rigidity and better mechanical property are preferred.
The cable density values of armored cables are large and are generally as follows: 1.2-1.5 g/cm 3 In the process of laying in water, the optical cable cannot be always in a suspended state, and the friction force between the optical cable sheath and the inner wall of the pipeline is still large.
The invention provides a water-laid armored optical cable, as shown in figures 1 and 2, a water-soluble layer is arranged on the surface of a waterproof outer sheath of the armored optical cable;
the water-soluble layer is made of water-soluble resin, the dissolving time of the water-soluble layer is 3-10min (23 ℃) at room temperature, the solubility is 85-95%, and the water-soluble layer is usually made of water-soluble resinThe kinematic viscosity of the saturated aqueous solution is 60-110 mm under the warm condition (23℃) 2 (ii)/s, oil balance (HLB) of 17 to 22; the purpose of the water-soluble layer is to play a role in lubricating in cooperation with the water laying process of the optical cable, reduce the friction force between the armored optical cable and the inner wall of the pipeline, and provide larger buoyancy force at the same time, so that the laying distance is prolonged as far as possible. Therefore, through experimental calculation, the kinematic viscosity of the aqueous solution is between 60 and 110mm 2 When the cable sheath is used between the first and the second, the friction force between the armored cable and the inner wall of the pipeline can be obviously reduced, the laying distance is prolonged, and the sheath surface defects such as scratch and puncture of the cable sheath layer caused by friction with the inner wall of the pipeline are reduced.
During the experiment test, when the laying distance of armor optical cable reaches kilometer magnitude, the comparatively obvious influence of the dissolving time of water-soluble layer has laid the distance, analyze its reason lie in adopting the water that has water-soluble layer to lay the armor optical cable and lay the process at water, on the one hand need in time dissolve in order to provide bigger buoyancy and littleer frictional force, on the other hand need maintain lubricated effect until being close to and lay the distance, so synthesize above factor, guarantee that water lays whole slow release, control its dissolving time and in 3~10min, can effectively improve the optical cable and carry out the limit distance that lays that water laid. The water laying distance of the armored optical cable can be increased to 9.0km (with a water-soluble layer) from 6.0km (without the water-soluble layer).
In addition, the water-soluble layer is in direct contact with the surface of the optical cable outer sheath in a long time from the production to the laying of the water-laid armored optical cable, the oil balance value of the water-soluble layer is an important factor influencing the stability of the optical cable, the water-soluble layer and the optical cable outer sheath are required to be made of different materials, the optical cable outer sheath is made of a water-insoluble material, the HLB is in a proper range, and the water-soluble layer and the sheath layer are easy to separate in the processing process and easy to peel off in the storage process due to over-high HLB so that the water-soluble layer fails; HLB is too low, leads to the interpenetration between water-soluble layer and the restrictive coating, and water lays the back of accomplishing, and the optical cable oversheath is ageing deformation easily, influences life. The HLB is selected to be between 17 and 22, so that the adverse effects can be reduced, and the requirements of various aspects such as manufacture, storage, service life and the like of the water laying optical cable can be met.
Preferred water-soluble resins contain, in parts by mass: 10 to 20 percent of polyethylene glycol, 50 to 75 percent of polyvinyl alcohol, 5 to 20 percent of cellulose acetate, 1 to 5 percent of sodium polyacrylate and 1 to 5 percent of potassium polyacrylate. The polyethylene glycol, the polyvinyl alcohol and the cellulose acetate are respectively in a liquid state, a solid state and a liquid state at normal temperature, the three are main factors determining the dissolution time and the dissolution efficiency, the slow release requirements are met through proper proportioning, the water-soluble layer is ensured to be slowly dissolved in the water laying process, and simultaneously the physical shape plasticity and the fluidity of the resin are ensured, so that the resin is suitable for the manufacturing process of coating or extrusion molding on one hand, particularly, the resin is matched with the extrusion melting temperature of an optical cable outer sheath material when being co-extruded and molded with the optical cable outer sheath, and on the other hand, the resin is not easy to deform and peel off in the storage and transportation processes. Since the main components of the water-soluble resin, such as polyethylene glycol, polyvinyl alcohol and cellulose acetate, mainly determine the oil balance value, the dissolution rate, the moldability and the oil balance value of the water-soluble resin should be considered to determine the proportions of the three. The sodium polyacrylate and the potassium polyacrylate mainly determine the kinematic viscosity of a saturated aqueous solution of the water-soluble resin, the parameter and the water laying condition determine the kinematic viscosity of the aqueous solution in the water laying process, and the effect of obviously reducing the friction between the optical cable sheath and the pipeline is difficult to achieve by the overlarge kinematic viscosity or the undersize kinematic viscosity of the aqueous solution in the water laying process. Under the actual water laying condition, when the kinematic viscosity of the saturated aqueous solution of the water-soluble resin is in the more proper range, the water-soluble resin is gradually dissolved in the pipeline, and the kinematic viscosity of the aqueous solution is maintained in the range for providing effective lubrication in the whole water laying process, so that the friction force between the sheath and the pipeline is reduced, the laying distance is prolonged, and the sheath is prevented from being damaged.
The water-soluble layers are longitudinally and continuously arranged or alternately and symmetrically arranged on the surface of the optical cable. The thickness of the water-soluble layer along the radial direction of the sheath layer is 10-30% of the maximum radial thickness of the sheath layer, and the cross-sectional area of the water-soluble layer is 5-20% of the whole area of the sheath.
The water-soluble layer arranged continuously can be manufactured at the same time of manufacturing the sheath layer as shown in figure 1, for example, a co-extrusion process can be adopted, and the processes of preparing the water-soluble layer and the sheath layer are simple; the sheath layer can be added after the sheath layer is manufactured, for example, a water-soluble layer can be formed outside the sheath layer by adopting a coating process so as to be compatible with the existing armored optical cable, more suitable for water laying and improve the laying distance.
When the water-soluble layers are alternately and symmetrically arranged on the surface of the optical cable, the structure is shown in fig. 2, the outer edge of the cross-sectional structure of the water-soluble layer is flush with the outer edge of the optical cable sheath, and a groove is reserved on the surface of the sheath after the water-soluble layers are dissolved, so that better propelling force is provided for the water laying process. The number of layers can be 8, 16 and 32; the central included angle between the layers can be 45 degrees, 22.5 degrees and 11.25 degrees; the cross section of the material is preferably of a special-shaped structure and can be in an inverted cone shape, a long strip shape, an inverted trapezoid shape, a semicircular shape, a semi-elliptical shape and a semi-rhombic shape.
The longitudinally continuous and symmetrical water soluble layers are preferably prepared by a coextrusion process.
The water-soluble resin of the water-soluble layer is directionally released to the space between the sheath layer and the inner wall of the pipeline and reacts with the high-speed water flow in the pipeline to form a water mixed solution.
When the armored optical cable for water laying is used for water laying, the water flow speed is between 40 and 50m/min, and the water flow is between 40 and 55L/min. The water flow speed and the water flow influence the dissolving process of the water-soluble layer and the kinematic viscosity of the water solution during water laying, so that the water flow speed and the water flow are controlled to ensure that the water solution provides good lubrication in the water laying process.
The invention provides a water-soluble resin, the dissolving time of which is 3-10min (23 ℃) at normal temperature, the solubility of which is 85-95 percent, and the kinematic viscosity of a saturated aqueous solution is 60-110 mm 2 (ii)/s, oil balance (HLB) of 17 to 22; preferably contains the following components in parts by mass: 10 to 20 percent of polyethylene glycol, 50 to 75 percent of polyvinyl alcohol, 5 to 20 percent of cellulose acetate, 1 to 5 percent of sodium polyacrylate and 1 to 5 percent of potassium polyacrylate.
The water-soluble resin provided by the invention is applied to forming a water-soluble layer of a water-laid armored optical cable, and is prepared by extruding from an extrusion head, wherein the extrusion melting temperature is 160-200 ℃; preferably, the water-soluble resin and the armored cable outer sheath are simultaneously extruded and prepared by a co-extrusion machine head.
The following are examples:
example 1
The water-laid armored optical cable structure provided by this embodiment is shown in fig. 3, the number of optical cable cores is 30, the number of twisted optical fibers is 5, the number of optical fiber cores in a sleeve is 6, the water-soluble layer i is a water-soluble resin mixture, the sheath layer ii is MDPE, the water blocking tape iii is a sodium polyacrylate coating tape, the sleeve iv is a PBT loose sleeve, the water blocking filler v is factice, the optical fiber vi is a colored optical fiber, the optical fiber is g654.e, the central reinforcing member vii is GRP, and the metal tape viii is a double-sided coated chrome-plated steel tape.
The water-soluble layers are longitudinally, continuously, alternately and symmetrically arranged with the sheath layer as shown in figure 2, the number of the water-soluble layers is 8, and the central angle between the layers is 45 degrees; the cross section structure of the water-soluble layer is in an inverted trapezoid shape; the outer edge of the cross-sectional structure of the water-soluble layer is flush with the outer edge of the sheath layer, the distance between the inner edge of the cross-sectional structure and the inner wall of the sheath layer is 80% of the thickness of the sheath, namely the radial thickness of the sheath layer is 20% of the maximum radial thickness of the sheath layer, and the cross-sectional area of the water-soluble layer is 10% of the whole area of the sheath.
Wherein the water-soluble layer resin is a water-soluble resin mixture, the resin material is polyethylene glycol, polyvinyl alcohol, cellulose acetate, sodium polyacrylate and potassium polyacrylate, and the hydrophilic-lipophilic balance (HLB) of the resin mixture is 18; the water-soluble layer resin mixture comprises the following components in percentage by weight: 10% of polyethylene glycol, 70% of polyvinyl alcohol, 15% of cellulose acetate, 3% of sodium polyacrylate and 2% of potassium polyacrylate; the water-soluble layer mixture is prepared by extruding the mixture by a co-extrusion machine head, wherein the melting temperature of a screw is 160 ℃, and the extrusion temperature of the machine head is 190 ℃.
Wherein, the water-soluble resin in the water-soluble layer is directionally released to the space between the sheath layer and the inner wall of the pipeline in the water laying process, and the water-soluble resin in the water-soluble layer and the high-speed water flow in the pipeline occurThe dissolution reaction formed an aqueous solution, the dissolution time of the resin was 5min (23 ℃) at room temperature, and the kinematic viscosity of the saturated aqueous solution of the water-soluble resin was 83mm 2 /s。
The laying distance of the water laying optical cable in the long-distance pipeline is 6.5km, the long-distance pipeline has 4 turning corners, the turning angle of each turning corner is 135 degrees, the water laying pressure is 14bar, the water flow speed is 40m/min, the water flow is 45L/min, the water laying pipeline is a silicon core pipe, and the pipe diameter is 40/33mm.
Example 2
The water-laid armored optical cable structure provided by this embodiment is as shown in fig. 4, the number of optical cable cores is 72, the number of twisted pieces is 6, the number of optical fiber cores in a sleeve is 12, the water-soluble layer i is a water-soluble resin mixture, the sheath layer ii is HDPE, the water blocking tape iii is a sodium polyacrylate coating tape, the sleeve iv is a PBT loose sleeve, the water blocking filler v is water blocking ointment, the optical fiber vi is a colored optical fiber, the optical fiber is g654.e, the central reinforcement vii is GRP, and the metal tape viii is a double-sided coated chrome-plated steel tape.
The water-soluble layers are longitudinally, continuously, alternately and symmetrically arranged with the sheath layer as shown in figure 2, the number of the water-soluble layers is 16, and the central angle between the layers is 22.5 degrees; the cross section structure of the water-soluble layer is an inverted semicircle; the outer edge of the cross-sectional structure of the water-soluble layer is flush with the outer edge of the sheath layer, the distance between the inner edge of the cross-sectional structure and the inner wall of the sheath layer is 85% of the thickness of the sheath, namely the water-soluble layer is arranged along the radial thickness of the sheath layer which is 15% of the maximum radial thickness of the sheath layer, and the cross-sectional area of the water-soluble layer is 15% of the whole area of the sheath.
Wherein the water-soluble layer resin is a water-soluble resin mixture, the resin material is polyethylene glycol, polyvinyl alcohol, cellulose acetate, sodium polyacrylate and potassium polyacrylate, and the hydrophilic-lipophilic balance (HLB) of the resin mixture is 20; the water-soluble layer resin mixture comprises the following components in percentage by weight: 15% of polyethylene glycol, 72% of polyvinyl alcohol, 10% of cellulose acetate, 1% of sodium polyacrylate and 2% of potassium polyacrylate; the water-soluble layer mixture is prepared by extruding the mixture by a co-extrusion machine head, wherein the melting temperature of a screw is 170 ℃, and the extrusion temperature of the machine head is 190 ℃.
Wherein, the water-soluble resin in the water-soluble layer is directionally released to the space between the sheath layer and the inner wall of the pipeline in the water laying process, the water-soluble resin in the water-soluble layer and high-speed water flow in the pipeline are subjected to dissolution reaction to form aqueous solution, the dissolution time of the resin at room temperature is 5min (23 ℃), and the kinematic viscosity of the saturated aqueous solution of the water-soluble resin is 70mm 2 /s。
The laying distance of the water laying optical cable in the long-distance pipeline is 6.5km, the long-distance pipeline has 6 turns, the turning angle of each turn is 135 degrees, the water laying pressure is 13bar, the water flow speed is 43m/min, the water flow is 44L/min, the water laying pipeline is a silicon core pipe, and the pipe diameter is 40/33mm.
Example 3
The water-laid armored optical cable structure provided by the embodiment is shown in fig. 5, the number of optical cable cores is 12, the water-soluble layer i is a water-soluble resin mixture, the sheath layer ii is HDPE, the water blocking tape III is a sodium polyacrylate coated tape, the reinforcement iv is GRP, the water blocking filler v is filled ointment, the optical fiber vi is a colored optical fiber, the optical fiber is g654.e, the sleeve vii is a PBT sleeve, and the metal tape viii is a double-sided coated aluminum tape.
The water-soluble layers are as shown in fig. 2 and are alternately and symmetrically arranged with the sheath layer, the number of the water-soluble layers is 16, and the central angle between the layers is 22.5 degrees; the cross section structure of the water-soluble layer is in an inverted semicircle shape; the outer edge of the cross-sectional structure of the water-soluble layer is flush with the outer edge of the sheath layer, the distance between the inner edge of the cross-sectional structure and the inner wall of the sheath layer is 87% of the thickness of the sheath, and the cross-sectional area of the water-soluble layer is 19% of the whole area of the sheath.
Wherein, the water-soluble layer resin is a water-soluble resin mixture, the resin materials are polyethylene glycol, polyvinyl alcohol, cellulose acetate, sodium polyacrylate and potassium polyacrylate, the hydrophilic-lipophilic balance (HLB) of the resin mixture is 21, and the water-soluble layer resin mixture comprises the following components in percentage by weight: 17% of polyethylene glycol, 72% of polyvinyl alcohol, 8% of cellulose acetate, 2% of sodium polyacrylate and 1% of potassium polyacrylate; the water-soluble layer mixture is prepared by extruding the mixture by a co-extrusion machine head, wherein the melting temperature of a screw is 160 ℃, and the extrusion temperature of the machine head is 190 ℃.
Wherein, water-soluble resin in the water-soluble layer directionally release to between restrictive coating and pipeline inner wall at water laying in-process, water-soluble resin in the water-soluble layer take place the dissolution reaction with the high-speed rivers in the pipeline and form aqueous solution, its resin dissolution time at room temperature is 6min (23 ℃), the kinematic viscosity of water-soluble resin saturated aqueous solution is 77mm 2 /s。
The laying distance of the water laying optical cable in the long-distance pipeline is 7.1km, the long-distance pipeline has 6 turns, the turning angle of each turn is 135 degrees, the water laying pressure is 15bar, the water flow speed is 41m/min, the water flow is 47L/min, the water laying pipeline is a silicon core pipe, and the pipe diameter is 40/33mm.
Example 4
The water-laid armored optical cable structure provided by the embodiment is shown in fig. 6, the number of optical cable cores is 72, the water-soluble layer i is a water-soluble resin mixture, the sheath layer ii is HDPE, the water blocking tape iii is a sodium polyacrylate coating tape, the sleeve iv is a PBT sleeve, the water blocking filler v is water blocking powder, the optical fiber vi is a colored optical fiber, the optical fiber is g654.E, the reinforcement vii is GRP, and the metal tape viii is a double-sided chromium-plated steel tape.
The water-soluble layer is as shown in fig. 1, and is continuously arranged with the sheath layer, and the water-soluble layer is a single layer and is coated on the outer side of the sheath layer; the distance between the inner edge of the water-soluble layer cross-sectional structure and the inner wall of the sheath layer is 89% of the thickness of the sheath, and the cross-sectional area of the water-soluble layer is 13% of the whole area of the sheath.
Wherein, the water-soluble layer resin is a water-soluble resin mixture, the resin materials are polyethylene glycol, polyvinyl alcohol, cellulose acetate, sodium polyacrylate and potassium polyacrylate, the hydrophilic-lipophilic balance (HLB) value of the resin mixture is 21, and the water-soluble layer resin mixture comprises the following components in percentage by weight: 13% of polyethylene glycol, 73% of polyvinyl alcohol, 10% of cellulose acetate, 2% of sodium polyacrylate and 2% of potassium polyacrylate; the water-soluble layer mixture is prepared by extruding the mixture by a co-extrusion machine head, wherein the melting temperature of a screw is 170 ℃, and the extrusion temperature of the machine head is 185 ℃.
Wherein, water-soluble resin in the water-soluble layer directionally releases to the space between sheath layer and pipeline inner wall in the water laying process, the water-soluble resin in the water-soluble layer and the high-speed water flow in the pipeline generate dissolution reaction to form aqueous solution, the dissolution time of the resin at room temperature is 5min (23 ℃), the kinematic viscosity of the saturated aqueous solution of the water-soluble resin is 93mm 2 /s。
The laying distance of the water laying optical cable in the long-distance pipeline is 8.5km, the long-distance pipeline has 6 turning corners, the turning angle of each turning corner is 135 degrees, the water laying pressure is 16bar, the water flow speed is 47m/min, the water flow is 51L/min, the water laying pipeline is a silicon core pipe, and the pipe diameter is 40/33mm.
Example 5
The water-laid armored optical cable structure provided by this embodiment is shown in fig. 7, the number of optical cable cores is 288 cores, the number of stranded pieces is 6, the number of optical fiber ribbons in a sleeve is 4, the number of optical fiber cores in the optical fiber ribbons is 12, the water-soluble layer i is a water-soluble resin mixture, the jacket layer ii is HDPE, the water blocking tape iii is a sodium polyacrylate coated tape, the sleeve iv is a PBT sleeve, the water blocking filler v is water blocking ointment, the optical fiber vi is an optical fiber ribbon, the optical fiber is g654.e, the reinforcing member vii is GRP, and the metal tape viii is a double-sided chromium-plated coated steel tape.
The water-soluble layer is as shown in fig. 1, and is continuously arranged with the sheath layer, and the water-soluble layer is a single layer and is coated on the outer side of the sheath layer; the distance between the inner edge of the water-soluble layer cross-sectional structure and the inner wall of the sheath layer is 83% of the thickness of the sheath, and the cross-sectional area of the water-soluble layer is 12% of the whole area of the sheath.
Wherein, the water-soluble layer resin is a water-soluble resin mixture, the resin materials are polyethylene glycol, polyvinyl alcohol, cellulose acetate, sodium polyacrylate and potassium polyacrylate, the hydrophilic-lipophilic balance (HLB) of the resin mixture is 20, and the water-soluble layer resin mixture comprises the following components in percentage by weight: 11% of polyethylene glycol, 74% of polyvinyl alcohol, 11% of cellulose acetate, 1% of sodium polyacrylate and 3% of potassium polyacrylate; the water-soluble layer mixture is prepared by extruding the mixture by a co-extrusion machine head, wherein the melting temperature of a screw is 180 ℃, and the extrusion temperature of the machine head is 190 ℃.
Wherein, the water-soluble resin in the water-soluble layer is directionally released to the space between the sheath layer and the inner wall of the pipeline in the water laying process, the water-soluble resin in the water-soluble layer and high-speed water flow in the pipeline are subjected to dissolution reaction to form aqueous solution, the dissolution time of the resin at room temperature is 6min (23 ℃), and the kinematic viscosity of the saturated aqueous solution of the water-soluble resin is 103mm 2 /s。
The laying distance of the water laying optical cable in the long-distance pipeline is 8.9km, the long-distance pipeline has 6 turns, the turning angle of each turn is 135 degrees, the water laying pressure is 16bar, the water flow speed is 47m/min, the water flow is 49L/min, the water laying pipeline is a silicon core pipe, and the pipe diameter is 40/33mm.
Example 6
The water-laid armored optical cable structure provided by this embodiment is shown in fig. 8, the number of optical cable cores is 120, the number of stranded pieces is 5, the number of optical fiber ribbons in a sleeve is 2, the number of optical fiber cores in the optical fiber ribbons is 12, the water-soluble layer i is a water-soluble resin mixture, the jacket layer ii is HDPE, the water blocking tape iii is a sodium polyacrylate coated tape, the sleeve iv is a PBT loose sleeve, the water blocking filler v is a filled ointment, the optical fiber vi is an optical fiber ribbon, the optical fiber is g654.e, the central reinforcement member vii is GRP, and the metal tape viii is a double-sided chromium-coated steel tape.
The water-soluble layers are as shown in figure 2 and are alternately and symmetrically arranged with the sheath layer, the number of the water-soluble layers is 8, and the central angle between the layers is 45 degrees; the cross section structure of the water-soluble layer is in an inverted trapezoid shape; the outer edge of the cross-sectional structure of the water-soluble layer is flush with the outer edge of the sheath layer, the distance between the inner edge of the cross-sectional structure and the inner wall of the sheath layer is 77% of the thickness of the sheath, and the cross-sectional area of the water-soluble layer is 13% of the whole area of the sheath.
Wherein the water-soluble layer resin is a water-soluble resin mixture, the resin material is polyethylene glycol, polyvinyl alcohol, cellulose acetate, sodium polyacrylate and potassium polyacrylate, and the hydrophilic-lipophilic balance (HLB) of the resin mixture is 19; the water-soluble layer resin mixture comprises the following components in percentage by weight: 13% of polyethylene glycol, 65% of polyvinyl alcohol, 17% of cellulose acetate, 2% of sodium polyacrylate and 3% of potassium polyacrylate; the water-soluble layer mixture is prepared by extruding the mixture by a co-extrusion machine head, wherein the melting temperature of a screw is 170 ℃, and the extrusion temperature of the machine head is 180 ℃.
Wherein, the water-soluble resin in the water-soluble layer is directionally released to the space between the sheath layer and the inner wall of the pipeline in the water laying process, the water-soluble resin in the water-soluble layer and high-speed water flow in the pipeline are subjected to dissolution reaction to form aqueous solution, the dissolution time of the resin at room temperature is 7min (23 ℃), and the kinematic viscosity of the saturated aqueous solution of the water-soluble resin is 105mm 2 /s。
The laying distance of the water laying optical cable in the long-distance pipeline is 8.2km, the long-distance pipeline has 4 turns, the turning angle of each turn is 135 degrees, the water laying pressure is 14bar, the water flow speed is 41m/min, the water flow is 43L/min, the water laying pipeline is a silicon core pipe, and the pipe diameter is 40/33mm.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A water-laid armored optical cable is characterized in that a water-soluble layer is arranged on the surface of a waterproof sheath layer of the armored optical cable; the water-soluble layer is made of water-soluble resin, and the kinematic viscosity of a saturated water solution of the water-soluble layer is 60 to 110mm 2 /s；
The water-soluble resin comprises the following components in parts by mass: 10 to 20 percent of polyethylene glycol, 50 to 75 percent of polyvinyl alcohol, 5 to 20 percent of cellulose acetate, 1 to 5 percent of sodium polyacrylate and 1 to 5 percent of potassium polyacrylate.
2. The water-laid armored optical cable of claim 1, wherein the solubility of the water-soluble resin is 85 to 95%, the dissolution time at room temperature is 3 to 10min, and the oil balance value is 17 to 22.
3. The water-laid armored optical cable of claim 1 or 2, wherein the thickness of the water-soluble layer in the radial direction of the sheath layer is 10 to 30% of the maximum radial thickness of the sheath layer, and the cross-sectional area of the water-soluble layer is 5 to 20% of the whole area of the sheath.
4. The water-laid armored cable of claim 1 or 2, wherein the water-soluble layers are disposed continuously or alternately symmetrically in the longitudinal direction of the cable.
5. The water-laid armored cable of claim 1 or 2, wherein the water-soluble layers are arranged continuously or symmetrically in the longitudinal direction of the cable, and the outer edges of the cross-sectional structures of the water-soluble layers are flush with the outer edge of the cable sheath when the water-soluble layers are arranged symmetrically in the alternating direction, so that a groove is left on the surface of the sheath after the water-soluble layers are dissolved.
6. A cable laying method, wherein the water-laid armored cable according to any one of claims 1 to 5 is laid in a pipeline using a water current; controlling the water flow speed to be between 40 and 50m/min and controlling the water flow to be between 40 and 55L/min.
7. The application of the water-soluble resin is characterized in that the water-soluble resin is applied to forming a water-soluble layer of a water-laid armored optical cable;
the dissolving time of the water-soluble resin is 3 to 10min at normal temperature, and the kinematic viscosity of a saturated aqueous solution is 60 to 110mm 2 The oil balance value is 17 to 22; the water-soluble resin comprises the following components in parts by mass: 10 to 20 percent of polyethylene glycol and 50 to 75 percent of polyethylene glycolPolyvinyl alcohol, 5 to 20 percent of cellulose acetate, 1 to 5 percent of sodium polyacrylate and 1 to 5 percent of potassium polyacrylate.
8. The use of the water-soluble resin according to claim 7, wherein the water-soluble resin is prepared by extrusion from an extrusion head, and the extrusion melting temperature is 160 to 200 ℃.
9. The use of the water-soluble resin according to claim 8, wherein the water-soluble resin is prepared by extrusion from a co-extrusion head simultaneously with a sheath layer of an armored fiber optic cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111246302.3A CN113897008B (en) | 2021-10-26 | 2021-10-26 | Water-laid armored optical cable, optical cable laying method, water-soluble resin and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111246302.3A CN113897008B (en) | 2021-10-26 | 2021-10-26 | Water-laid armored optical cable, optical cable laying method, water-soluble resin and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113897008A CN113897008A (en) | 2022-01-07 |
| CN113897008B true CN113897008B (en) | 2022-11-29 |
Family
ID=79026227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111246302.3A Active CN113897008B (en) | 2021-10-26 | 2021-10-26 | Water-laid armored optical cable, optical cable laying method, water-soluble resin and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113897008B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115542489B (en) * | 2022-10-17 | 2023-11-10 | 长飞光纤光缆股份有限公司 | Lateral pressure resistant Yi Wanqu optical unit, preparation method thereof and optical cable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB521801A (en) * | 1938-11-24 | 1940-05-31 | Standard Telephones Cables Ltd | Improvements in or relating to electric communication cables |
| WO2000021098A1 (en) * | 1998-10-07 | 2000-04-13 | Pirelli Cavi E Sistemi S.P.A. | Water-resistant cable |
| CN105980901A (en) * | 2013-12-30 | 2016-09-28 | 康宁光电通信有限责任公司 | Fibre optic cable with thin composite film |
| CN110103557A (en) * | 2019-05-21 | 2019-08-09 | 远程电缆股份有限公司 | A kind of resistance seawater, acid-base solution, industrial wastewater and sanitary sewage cable are blocked water composite band material and preparation method thereof with fire resisting |
| CN111172760A (en) * | 2018-11-09 | 2020-05-19 | 中蓝晨光化工研究设计院有限公司 | High-expansion-rate water-blocking yarn and production process thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6801696B2 (en) * | 2002-06-07 | 2004-10-05 | Fitel Usa Corp. | Fiber optic cable structure and method |
| WO2016160316A1 (en) * | 2015-03-31 | 2016-10-06 | Dow Global Technologies Llc | Flooding compounds for telecommunication cables |
-
2021
- 2021-10-26 CN CN202111246302.3A patent/CN113897008B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB521801A (en) * | 1938-11-24 | 1940-05-31 | Standard Telephones Cables Ltd | Improvements in or relating to electric communication cables |
| WO2000021098A1 (en) * | 1998-10-07 | 2000-04-13 | Pirelli Cavi E Sistemi S.P.A. | Water-resistant cable |
| CN105980901A (en) * | 2013-12-30 | 2016-09-28 | 康宁光电通信有限责任公司 | Fibre optic cable with thin composite film |
| CN111172760A (en) * | 2018-11-09 | 2020-05-19 | 中蓝晨光化工研究设计院有限公司 | High-expansion-rate water-blocking yarn and production process thereof |
| CN110103557A (en) * | 2019-05-21 | 2019-08-09 | 远程电缆股份有限公司 | A kind of resistance seawater, acid-base solution, industrial wastewater and sanitary sewage cable are blocked water composite band material and preparation method thereof with fire resisting |
Non-Patent Citations (2)
| Title |
|---|
| 光缆敷设方法介绍;长飞光纤光缆（上海）有限公司;《智能建筑与城市信息》;20080225(第02期);第55-58页 * |
| 阻水粉(高分子吸水性树脂粉或SAP/WBP)在光缆中的应用前景及性能测试;姚美芹等;《现代传输》;20171215(第06期);第56-58页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113897008A (en) | 2022-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113897008B (en) | Water-laid armored optical cable, optical cable laying method, water-soluble resin and application | |
| US9778434B2 (en) | Buffered fibers with access features | |
| CN202563138U (en) | Semi-dry stranded loose tube type optical fiber ribbon optical cable | |
| WO2021003805A1 (en) | Large-capacity low-resistance transoceanic relaying submarine optical fiber cable | |
| CN101866720A (en) | Buoyancy controllable optoelectrical composite cable | |
| EP3657226A1 (en) | Ultra-fine anti-ant air-blowing optical cable and manufacturing method therefor | |
| CN201820024U (en) | Novel optical cable for rail transportation | |
| CN210270296U (en) | Large-capacity low-resistance ocean-crossing trunked submarine optical cable | |
| CN113917637B (en) | All-dielectric optical cable and laying method thereof | |
| CN208654378U (en) | A kind of extrusion moulding mold of fire-retardant 8 word optical cable, half squash type | |
| CN103217763B (en) | Spring cable | |
| CN107561660B (en) | Layer-stranded optical cable with filling rope and manufacturing method | |
| CN211786265U (en) | Layer stranded optical cable | |
| CN201796648U (en) | Buoyancy-controllable photoelectric comprehensive cable | |
| CN104818634A (en) | Steel-rubber composite rope and manufacturing method thereof | |
| CN206096569U (en) | Two sheath self -supporting butterfly -shaped optical cable | |
| CN202057847U (en) | Covered-wire optical cable | |
| CN212989723U (en) | From area guide cable formula air-blowing type 288 core OPGW optical cable | |
| CN210666133U (en) | Pipeline optical cable | |
| CN202649557U (en) | Central beam-tube optical fiber having irregular-shaped reinforcing piece | |
| CN206096566U (en) | Submarine fiber cable resistance to wears | |
| CN102707399B (en) | Central bundle tubular optical cable with special-shaped reinforcement pieces | |
| CN105445877A (en) | Crescent-shaped groove optical cable | |
| CN113900205B (en) | Water laying optical cable with spiral grooves in surface | |
| CN201765875U (en) | Filling strip of power cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |