CN223427272U - Optical fiber composite cable for mobile equipment - Google Patents
Optical fiber composite cable for mobile equipmentInfo
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- CN223427272U CN223427272U CN202422042535.7U CN202422042535U CN223427272U CN 223427272 U CN223427272 U CN 223427272U CN 202422042535 U CN202422042535 U CN 202422042535U CN 223427272 U CN223427272 U CN 223427272U
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Abstract
本实用新型涉及电缆技术领域，具体公开了一种移动设备用光纤复合电缆，包括由多根动力线芯和至少一根光纤线芯组成的缆心；所述缆心的多根动力线芯绞合在一起，所述缆心的光纤线芯排布在相邻两根动力线芯的外侧绞合间隙处；所述缆心的外部由内而外依次包覆有内护套层、芳纶丝编织层和外护套层；所述芳纶丝编织层的编织节径比≤3倍、编织密度≥25%。本实用新型既有利于保护光纤线芯免受绞合损伤，亦有利于所成型复合电缆的结构紧凑化，还能使所成型复合电缆可靠地实现较高整体结构强度，获得良好的弯曲、拖曳性能，有效满足于移动设备在对应工况环境的使用技术要求，服役寿命长。
The utility model relates to the field of cable technology, specifically disclosing a fiber optic composite cable for mobile devices, comprising a cable core composed of multiple power cores and at least one optical fiber core; the multiple power cores of the cable core are twisted together, and the optical fiber cores of the cable core are arranged in the outer twisting gaps between two adjacent power cores; the exterior of the cable core is sequentially coated with an inner sheath layer, an aramid braided layer, and an outer sheath layer from the inside out; the braiding pitch-to-diameter ratio of the aramid braided layer is ≤3 times, and the braiding density is ≥25%. The utility model not only helps protect the optical fiber cores from twisting damage, but also helps to make the structure of the resulting composite cable more compact. It also enables the resulting composite cable to reliably achieve high overall structural strength, obtain good bending and dragging performance, effectively meet the technical requirements for use of mobile devices in corresponding working environments, and prolong service life.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to an optical fiber composite cable for mobile equipment with rated voltage of 8.7/10kV or below.
Background
The cable with rated voltage of 8.7/10kV or below is mainly used for power transmission of mobile equipment in working conditions such as coal mines, ports, shields, lifting and the like, namely, the power wire cores of the mobile equipment are formed. With the rapid development of the intelligent technology in recent years, the mobile devices in the working condition environment generally have signal transmission functions such as data acquisition and control instruction reception, and the like, and need to rely on optical fiber cores, so that in order to simplify and compact the bus structure of the mobile devices, the optical fiber cores and the power cores applied to the same mobile device are combined together to form an optical fiber composite cable, for example, the optical fiber composite cable disclosed in the China patent literature is named as a "metal shielding type photoelectric composite rubber jacketed flexible cable of a coal mining machine", the publication number CN 211264982U, the publication date of 08, 14 days of 2020, and the like.
The mobile equipment needs to frequently carry out mobile operation in the corresponding working condition environment, so that the optical fiber composite cable applied to the mobile equipment has higher overall structural strength, bending and dragging performances.
In the technology of CN 211264982U, in order to improve the overall structural strength, a large number of fiber reinforced skeletons are filled outside the cable core covered by the sheath layer, and two layers of spiral armor layers, fiber tensile elements, and the like are formed on the fiber core with stainless steel strips. Although the optical fiber composite cable with the structure has excellent overall structural strength, the forming structure is complicated, the compact forming is not facilitated, and the unit length weight is heavy, so that the bending performance is directly reduced, namely the bending performance is sacrificed to improve the overall structural strength. Based on the frequent movement (or posture change) operation of the mobile equipment, the optical fiber composite cable with lower bending performance is obviously difficult to meet the technical requirements of the mobile equipment, especially the coal mine mobile equipment with frequent movement operation, and the service life is shorter.
Disclosure of utility model
The utility model aims to provide the optical fiber composite cable for the mobile equipment, which has compact structure, high overall structural strength and good bending performance and towing performance, aiming at the special requirements of the mobile equipment for electric power transmission and signal transmission and the technical defects of the traditional optical fiber composite cable.
The technical aim of the utility model is achieved by the following technical scheme that the optical fiber composite cable for the mobile equipment comprises a cable core composed of a plurality of power wire cores and at least one optical fiber wire core;
The plurality of power wire cores of the cable core are stranded together, and the optical fiber wire cores of the cable core are arranged at the outside stranded gaps of two adjacent power wire cores;
The outer part of the cable core is sequentially coated with an inner sheath layer, an aramid fiber woven layer and an outer sheath layer from inside to outside;
The braiding pitch diameter ratio of the aramid fiber yarn braiding layer is less than or equal to 3 times, and the braiding density is more than or equal to 25%.
Further, the cable core consists of three power wire cores and one optical fiber wire core;
the three power wire cores are stranded together, and the optical fiber wire cores are arranged at the outside stranded gaps of two adjacent power wire cores at any position.
The technical measures described above are directed to the particulars of the above-mentioned mobile device that need to be achieved for power transmission and signal transmission, forming a composite cable core integrating power transmission and signal transmission, in the forming structure of which, the optical fiber wire cores are arranged along the outer twisting gaps of the power wire cores, so that the cable core is compact in structure, the optical fiber wire cores do not need to directly participate in twisting extrusion of the power wire cores, and the protection of the optical fiber wire cores from twisting damage is facilitated. On the basis of the composite cable core, a specific braiding reinforcing layer is formed between the inner sheath layer and the outer sheath layer by an aramid fiber yarn braiding structure, the reinforcing function of the integral structural strength is borne between the inner sheath layer and the outer sheath layer by the aramid fiber yarn braiding structure, excessive filling of the composite cable core is not needed, the compactness of the formed composite cable is facilitated, the bending performance of the formed composite cable is improved, and the specific aramid fiber yarn braiding structure has the characteristics of high structural strength, high modulus, high toughness, low weight, high temperature resistance and the like, so that the formed composite cable reliably achieves higher integral structural strength, obtains good dragging performance, effectively meets the use technical requirements of mobile equipment in corresponding working condition environments, and is long in service life.
As one of the preferable technical schemes, the power wire core consists of a power conductor, and a semiconductive rubber inner shielding layer, an insulating layer, a semiconductive rubber outer shielding layer and a reinforced shielding layer which are sequentially coated outside the power conductor from inside to outside.
Further, the power conductor is formed by twisting a plurality of strands of tin-plated copper wires in a concentric circle arrangement structure;
Each tinned copper wire is formed by twisting a plurality of tinned copper wire bundles with the diameters of 0.3-0.5 mm, and the twisting direction of the tinned copper wires is opposite to the twisting direction of the power conductor.
Further, the insulating layer is of an extrusion structure of hard ethylene propylene rubber.
Further, the reinforced shielding layer is a mixed braiding structure of tinned copper wires and aramid fibers outside the semiconductive rubber outer shielding layer, and the braiding density is more than or equal to 85%.
The power wire core of the technical measure meets the power transmission technical requirement of 8.7/10kV with the highest rated voltage, has excellent electromagnetic interference resistance, stable power transmission, good structural compactness, bending property and dragging property and high structural strength.
As one of the preferable technical schemes, the optical fiber core is composed of a core body formed by twisting a plurality of optical fiber units around a central reinforcing core and an optical fiber sheath layer extruded outside the core body;
the optical fiber sheath layer is of a fluoroplastic extrusion structure.
Further, the optical fiber unit consists of a plurality of optical fiber conductors penetrating into the sleeve layer and optical fiber ointment filled in the sleeve layer;
The optical fiber conductor is a G.657 bending loss insensitive optical fiber;
the sleeve layer is of a fluoroplastic extrusion structure.
The optical fiber core of the technical measure has good protectiveness on the optical fiber conductor, is favorable for ensuring that the optical fiber conductor is prevented from being twisted and extruded to be damaged when being cabled, has stable signal transmission and has good high and low temperature resistance.
As one of the preferable technical schemes, the inner sheath layer is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber;
The outer sheath layer is of an extrusion structure of EVM low-smoke halogen-free flame retardant rubber;
the inner sheath layer and the outer sheath layer are mutually embedded through the aramid fiber yarn weaving layer.
The sheath layer of the technical measure has good environmental protection, does not generate harmful substances and has less smoke when being burnt when meeting fire, and meets the environmental protection technical requirements. In addition, the inner sheath layer and the outer sheath layer are mutually embedded through the aramid fiber weaving layer, so that the structural strength is improved.
As one of preferable technical schemes, the rated voltage of the optical fiber composite cable is 8.7/10kV at most.
The beneficial technical effects of the utility model are as follows: the technical measures described above are directed to the particulars of the above-mentioned mobile device that need to be achieved for power transmission and signal transmission, forming a composite cable core integrating power transmission and signal transmission, in the forming structure of which, the optical fiber wire cores are arranged along the outer twisting gaps of the power wire cores, so that the cable core is compact in structure, the optical fiber wire cores do not need to directly participate in twisting extrusion of the power wire cores, and the protection of the optical fiber wire cores from twisting damage is facilitated. On the basis of the composite cable core, a specific braiding reinforcing layer is formed between the inner sheath layer and the outer sheath layer by an aramid fiber yarn braiding structure, the reinforcing function of the integral structural strength is borne between the inner sheath layer and the outer sheath layer by the aramid fiber yarn braiding structure, excessive filling of the composite cable core is not needed, the compactness of the formed composite cable is facilitated, the bending performance of the formed composite cable is improved, and the specific aramid fiber yarn braiding structure has the characteristics of high structural strength, high modulus, high toughness, low weight, high temperature resistance and the like, so that the formed composite cable reliably achieves higher integral structural strength, obtains good dragging performance, effectively meets the use technical requirements of mobile equipment in corresponding working condition environments, and is long in service life.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic structural diagram of the optical fiber core in fig. 1.
The symbol in the figure means 1-power wire core, 11-power conductor, 12-semi-conductive rubber inner shielding layer, 13-insulating layer, 14-semi-conductive rubber outer shielding layer, 15-reinforced shielding layer, 2-optical fiber wire core, 21-optical fiber unit, 211-optical fiber conductor, 212-optical fiber ointment, 213-sleeve layer, 22-central reinforced core, 23-optical fiber sheath layer, 3-inner sheath layer, 4-aramid fiber woven layer and 5-outer sheath layer.
Detailed Description
The utility model relates to the technical field of cables, in particular to an optical fiber composite cable with rated voltage of 8.7/10kV or below for mobile equipment, and the technical scheme of the main body of the utility model is specifically described below by combining a plurality of embodiments. In which, the technical solution of the present utility model is clearly and specifically explained in embodiment 1 with reference to the drawings in the specification, that is, fig. 1 and fig. 2, and in other embodiments, although the drawings are not drawn separately, the main structure of the embodiment may still refer to the drawings in embodiment 1.
It is to be noted here in particular that the figures of the utility model are schematic, which for the sake of clarity have simplified unnecessary details in order to avoid obscuring the technical solutions of the utility model which contribute to the state of the art. In addition, the following expressions of "about", "substantially" and the like with respect to the number or the fitting relation mean that the existence of fitting errors, processing errors and the like which are reasonable in the industry is allowed, and the absolute number or fitting relation is not expressed literally.
Example 1
Referring to fig. 1 and 2, the utility model comprises a cable core, an inner sheath layer 3, an aramid fiber woven layer 4 and an outer sheath layer 5 which are sequentially coated outside the cable core from inside to outside.
Specifically, the cable core is provided with three power wire cores 1 and one optical fiber wire core 2. The three power wire cores 1 are stranded together, the optical fiber wire cores 2 are arranged at the outside stranded gaps of two adjacent power wire cores 1 at any position, the outer diameter of each optical fiber wire core 2 is smaller than the outer diameter of each power wire core 1, and the stranded whole circle of the three power wire cores 1 is not affected.
Each power wire core 1 consists of a power conductor 11, and a semiconductive rubber inner shielding layer 12, an insulating layer 13, a semiconductive rubber outer shielding layer 14 and a reinforced shielding layer 15 which are sequentially coated outside the power conductor 11 from inside to outside. The power conductor 11 is formed by twisting a plurality of strands of tinned copper wires in a concentric circle arrangement structure (for example, a 1+6 concentric circle arrangement structure), each strand of tinned copper wires is formed by twisting a plurality of tinned copper wire bundles with the diameter of about 0.4mm, the bundle twisting direction of the tinned copper wires is required to be opposite to the twisting direction of the power conductor 11, and the obtained power conductor 11 meets the technical requirements of a GB/T3986-2008 fifth type conductor. The insulating layer 13 is an extrusion structure of hard ethylene propylene rubber with volume resistivity of more than or equal to 10 16 Ω & m and tensile strength of more than or equal to 8MPa, has higher insulating electrical property, can effectively meet the technical requirement of 8.7/10kV voltage class, and in addition, the tensile strength can ensure that the insulating layer is not easy to deform and stable in size in the processing process, thereby reliably ensuring the stable insulating property. The reinforced shielding layer 15 is a mixed knitting structure of tinned copper wires and aramid fibers outside the semiconductive rubber outer shielding layer 14, the knitting density is about 88%, and the mixing ratio of the tinned copper wires and the aramid fibers is about 1:1.
The optical fiber core 2 is composed of a core body (for example, 1+6 concentric circle arrangement structure) formed by twisting a plurality of optical fiber units 21 around a central reinforcing core 22, and an optical fiber sheath layer 23 extruded outside the core body. The optical fiber unit 21 consists of 6 optical fiber conductors 211 penetrating through the sleeve layer 213 and optical fiber ointment 212 filled in the second sleeve layer 213 and coating each optical fiber conductor 211, wherein the optical fiber conductors 211 are G.657 bending loss insensitive optical fibers, the minimum bending radius of the optical fiber conductors can reach 5-10 mm, the technical requirements of the minimum bending radius in the processing and using processes of the optical fiber composite cable are met, the optical fiber ointment 212 adopts high-temperature resistant optical fiber ointment, so that the optical fiber ointment keeps good performance stable in the vulcanizing process, the sleeve layer 213 is of a fluoroplastic extrusion structure, and has high heat resistance due to the fact that fluorine atoms are contained in the molecular structure of fluoroplastic, and is suitable for working in a temperature environment of-80-250 ℃ for a long time and difficult to deform in the vulcanizing process. The optical fiber sheath layer 23 is of a fluoroplastic extrusion structure, and similarly, because fluorine atoms are contained in the molecular structure of the fluoroplastic, the fluoroplastic has high heat resistance, is suitable for working in a temperature environment of-80-250 ℃ for a long time, and is not easy to deform in the vulcanization processing process.
The inner sheath layer 3 is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber.
The aramid yarn braiding layer 4 is a braiding structure of aramid yarn outside the inner sheath layer 3. In the weaving structure of the aramid yarn weaving layer 4, the number of weaving is 6 in the forward direction and 6 in the reverse direction, the weaving pitch diameter ratio is about 3 times, the weaving density is about 30%, and the weaving structure can effectively cover the aramid yarn on the surface of the inner sheath layer 3 of the whole cable, so that the cable reinforcing performance is more effective and reliable.
The outer sheath layer 5 is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber outside the aramid fiber woven layer 4, the outer sheath layer 5 and the inner sheath layer 3 are mutually embedded through the woven holes of the aramid fiber woven layer 4 in the extrusion vulcanization process, the whole is formed, and the aramid fiber woven layer 4 reinforces the sheath structure and the whole structure. The aramid fiber woven layer 4 is used as a reinforcing structure, is different from the traditional metal (such as a stainless steel belt or a steel wire) for reinforcement, and particularly, the aramid fiber woven layer 4 is used as a novel high-tech synthetic fiber, has the technical characteristics of ultrahigh strength, high modulus, high temperature resistance, acid resistance, alkali resistance, light weight and the like, has the strength of about 5-6 times that of the steel wire, the modulus of the aramid fiber woven layer is about 2-3 times that of the steel wire or the glass fiber, the toughness of the aramid fiber woven layer is about 2 times that of the steel wire, and the weight of the aramid fiber woven layer is only about 1/5 of that of the steel wire, and is not decomposed or melted even in a temperature environment of 560 ℃. The aramid yarn woven layer 4 compounded between the inner sheath layer 3 and the outer sheath layer 5 according to the woven structure can cope with the external force applied to the cable from all directions, and has high structural strength.
Example 2
The utility model comprises a cable core, an inner sheath layer, an aramid fiber woven layer and an outer sheath layer which are sequentially coated outside the cable core from inside to outside.
Specifically, the cable core is provided with three power wire cores and one optical fiber wire core. The three power wire cores are stranded together, the optical fiber wire cores are arranged at the outside stranded gaps of two adjacent power wire cores at any position, the outer diameter of each optical fiber wire core is smaller than that of each power wire core, and the stranded whole circle of the three power wire cores is not affected.
Each power wire core consists of a power conductor, and a semiconductive rubber inner shielding layer, an insulating layer, a semiconductive rubber outer shielding layer and a reinforced shielding layer which are sequentially coated outside the power conductor from inside to outside. The power conductor is formed by twisting a plurality of strands of tinned copper wires in a concentric circle arrangement structure (for example, a concentric circle arrangement structure of 1+6+12), each strand of tinned copper wires is formed by twisting a plurality of tinned copper wire bundles with diameters of about 0.3mm, the bundle twisting direction of the tinned copper wires is required to be opposite to the twisting direction of the power conductor, and the obtained power conductor meets the technical requirements of a GB/T3986-2008 fifth type conductor. The insulating layer is an extrusion structure of hard ethylene propylene rubber with volume resistivity of more than or equal to 10 16 Ω & m and tensile strength of more than or equal to 8MPa, has higher insulating electrical property, can effectively meet the technical requirement of 8.7/10kV voltage class, and in addition, the tensile strength can ensure that the insulating layer is not easy to deform and stable in size in the processing process, thereby reliably ensuring the stable insulating property. The reinforced shielding layer is a mixed knitting structure of tinned copper wires and aramid fibers outside the semiconductive rubber outer shielding layer, the knitting density is about 85%, and the mixing ratio of the tinned copper wires to the aramid fibers is about 1:1.
The optical fiber core is composed of a core body (for example, 1+6 concentric circle arrangement structure) formed by twisting a plurality of optical fiber units around a central reinforcing core, and an optical fiber sheath layer extruded outside the core body. The optical fiber unit consists of 8 optical fiber conductors penetrating through a sleeve layer and optical fiber ointment filled in a second sleeve layer and coating the optical fiber conductors, wherein the optical fiber conductors are G.657 bending loss insensitive optical fibers, the minimum bending radius of the optical fiber conductors can reach 5-10 mm, the technical requirements of the minimum bending radius in the processing and using processes of the optical fiber composite cable are met, the optical fiber ointment adopts high-temperature resistant optical fiber ointment, so that the optical fiber ointment can keep good performance stable in the vulcanizing process, the sleeve layer is of a fluoroplastic extrusion structure, and the fluoroplastic has high heat resistance due to the fact that fluorine atoms are contained in the molecular structure of the fluoroplastic, and is suitable for working in a temperature environment of 80-250 ℃ for a long time, and is not easy to deform in the vulcanizing process. The optical fiber sheath layer is of a fluoroplastic extrusion structure, and similarly, because fluorine atoms are contained in the molecular structure of the fluoroplastic, the fluoroplastic has high heat resistance, is suitable for working in a temperature environment of-80-250 ℃ for a long time, and is not easy to deform in the vulcanization processing process.
The inner sheath layer is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber.
The aramid yarn braiding layer is a braiding structure of aramid yarn outside the inner sheath layer. In the weaving structure of the aramid yarn weaving layer, the number of the weaving yarns is 8 in the forward direction and 8 in the reverse direction, the weaving pitch diameter ratio is about 2.5 times, the weaving density is about 40%, and the weaving structure can effectively cover the aramid yarn on the surface of the inner sheath layer of the whole cable, so that the cable reinforcing performance is more effective and reliable.
The outer sheath layer is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber outside the aramid fiber woven layer, the outer sheath layer and the inner sheath layer are mutually embedded through the woven holes of the aramid fiber woven layer in the extrusion vulcanization process, the whole is formed, and the aramid fiber woven layer reinforces the sheath structure and the whole structure. The aramid fiber braided layer is used as a reinforcing structure, is different from the traditional metal (such as a stainless steel belt or a steel wire) for reinforcement, and particularly, the aramid fiber is used as a novel high-tech synthetic fiber, has the technical characteristics of ultrahigh strength, high modulus, high temperature resistance, acid resistance, alkali resistance, light weight and the like, has the strength of about 5-6 times that of the steel wire, the modulus of about 2-3 times that of the steel wire or the glass fiber, has the toughness of about 2 times that of the steel wire, and has the weight of only about 1/5 of the steel wire, and is not decomposed or melted even under the temperature environment of 560 ℃. The aramid fiber braided layer compounded between the inner sheath layer and the outer sheath layer according to the braided structure can cope with the external force applied to the cable from all directions, and has high structural strength.
Example 3
The utility model comprises a cable core, an inner sheath layer, an aramid fiber woven layer and an outer sheath layer which are sequentially coated outside the cable core from inside to outside.
Specifically, the cable core is provided with three power wire cores and one optical fiber wire core. The three power wire cores are stranded together, the optical fiber wire cores are arranged at the outside stranded gaps of two adjacent power wire cores at any position, the outer diameter of each optical fiber wire core is smaller than that of each power wire core, and the stranded whole circle of the three power wire cores is not affected.
Each power wire core consists of a power conductor, and a semiconductive rubber inner shielding layer, an insulating layer, a semiconductive rubber outer shielding layer and a reinforced shielding layer which are sequentially coated outside the power conductor from inside to outside. The power conductor is formed by twisting a plurality of tinned copper wires in a concentric circle arrangement structure (for example, a 1+6 concentric circle arrangement structure), each tinned copper wire is formed by twisting a plurality of tinned copper wire bundles with the diameter of about 0.5mm, the bundle twisting direction of the tinned copper wires is required to be opposite to the twisting direction of the power conductor, and the obtained power conductor meets the technical requirements of a GB/T3986-2008 fifth type conductor. The insulating layer is an extrusion structure of hard ethylene propylene rubber with volume resistivity of more than or equal to 10 16 Ω & m and tensile strength of more than or equal to 8MPa, has higher insulating electrical property, can effectively meet the technical requirement of 8.7/10kV voltage class, and in addition, the tensile strength can ensure that the insulating layer is not easy to deform and stable in size in the processing process, thereby reliably ensuring the stable insulating property. The reinforced shielding layer is a mixed knitting structure of tinned copper wires and aramid fibers outside the semiconductive rubber outer shielding layer, the knitting density is about 90%, and the mixing ratio of the tinned copper wires to the aramid fibers is 1.5:1.
The optical fiber core is composed of a core body (for example, 1+6 concentric circle arrangement structure) formed by twisting a plurality of optical fiber units around a central reinforcing core, and an optical fiber sheath layer extruded outside the core body. The optical fiber unit consists of 7 optical fiber conductors penetrating through a sleeve layer and optical fiber ointment filled in a second sleeve layer and coating the optical fiber conductors, wherein the optical fiber conductors are G.657 optical fibers insensitive to bending loss, the minimum bending radius of the optical fiber conductors can reach 5-10 mm, the technical requirements of the minimum bending radius in the processing and using processes of the optical fiber composite cable are met, the optical fiber ointment adopts high-temperature-resistant optical fiber ointment, so that the optical fiber ointment can maintain good performance stability in the vulcanizing process, the sleeve layer is of a fluoroplastic extrusion structure, and the fluoroplastic has high heat resistance due to the fact that fluorine atoms are contained in the molecular structure of the fluoroplastic, and is suitable for working in a temperature environment of 80-250 ℃ for a long time and difficult to deform in the vulcanizing process. The optical fiber sheath layer is of a fluoroplastic extrusion structure, and similarly, because fluorine atoms are contained in the molecular structure of the fluoroplastic, the fluoroplastic has high heat resistance, is suitable for working in a temperature environment of-80-250 ℃ for a long time, and is not easy to deform in the vulcanization processing process.
The inner sheath layer is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber.
The aramid yarn braiding layer is a braiding structure of aramid yarn outside the inner sheath layer. In the weaving structure of the aramid yarn weaving layer, the number of the weaving yarns is 7 in the forward direction and 7 in the reverse direction, the weaving pitch diameter ratio is about 2 times, and the weaving density is about 45 percent.
The outer sheath layer is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber outside the aramid fiber woven layer, the outer sheath layer and the inner sheath layer are mutually embedded through the woven holes of the aramid fiber woven layer in the extrusion vulcanization process, the whole is formed, and the aramid fiber woven layer reinforces the sheath structure and the whole structure. The aramid fiber braided layer is used as a reinforcing structure, is different from the traditional metal (such as a stainless steel belt or a steel wire) for reinforcement, and particularly, the aramid fiber is used as a novel high-tech synthetic fiber, has the technical characteristics of ultrahigh strength, high modulus, high temperature resistance, acid resistance, alkali resistance, light weight and the like, has the strength of about 5-6 times that of the steel wire, the modulus of about 2-3 times that of the steel wire or the glass fiber, has the toughness of about 2 times that of the steel wire, and has the weight of only about 1/5 of the steel wire, and is not decomposed or melted even under the temperature environment of 560 ℃. The aramid fiber braided layer compounded between the inner sheath layer and the outer sheath layer according to the braided structure can cope with the external force applied to the cable from all directions, and has high structural strength.
Example 4
The utility model comprises a cable core, an inner sheath layer, an aramid fiber woven layer and an outer sheath layer which are sequentially coated outside the cable core from inside to outside.
Specifically, the cable core is provided with three power wire cores and one optical fiber wire core. The three power wire cores are stranded together, the optical fiber wire cores are arranged at the outside stranded gaps of two adjacent power wire cores at any position, the outer diameter of each optical fiber wire core is smaller than that of each power wire core, and the stranded whole circle of the three power wire cores is not affected.
Each power wire core consists of a power conductor, and a semiconductive rubber inner shielding layer, an insulating layer, a semiconductive rubber outer shielding layer and a reinforced shielding layer which are sequentially coated outside the power conductor from inside to outside. The power conductor is formed by twisting a plurality of tinned copper wires in a concentric circle arrangement structure (for example, a concentric circle arrangement structure of 1+6+12), each tinned copper wire is formed by twisting a plurality of tinned copper wire bundles with the diameter of about 0.35mm, the bundle twisting direction of the tinned copper wires is required to be opposite to the twisting direction of the power conductor, and the obtained power conductor meets the technical requirements of a GB/T3986-2008 fifth type conductor. The insulating layer is an extrusion structure of hard ethylene propylene rubber with volume resistivity of more than or equal to 10 16 Ω & m and tensile strength of more than or equal to 8MPa, has higher insulating electrical property, can effectively meet the technical requirement of 8.7/10kV voltage class, and in addition, the tensile strength can ensure that the insulating layer is not easy to deform and stable in size in the processing process, thereby reliably ensuring the stable insulating property. The reinforced shielding layer is a mixed knitting structure of tinned copper wires and aramid fibers outside the semiconductive rubber outer shielding layer, the knitting density is about 85%, and the mixing ratio of the tinned copper wires to the aramid fibers is 1.2:1.
The optical fiber core is composed of a core body (for example, 1+6 concentric circle arrangement structure) formed by twisting a plurality of optical fiber units around a central reinforcing core, and an optical fiber sheath layer extruded outside the core body. The optical fiber unit consists of 8 optical fiber conductors penetrating through a sleeve layer and optical fiber ointment filled in a second sleeve layer and coating the optical fiber conductors, wherein the optical fiber conductors are G.657 bending loss insensitive optical fibers, the minimum bending radius of the optical fiber conductors can reach 5-10 mm, the technical requirements of the minimum bending radius in the processing and using processes of the optical fiber composite cable are met, the optical fiber ointment adopts high-temperature resistant optical fiber ointment, so that the optical fiber ointment can keep good performance stable in the vulcanizing process, the sleeve layer is of a fluoroplastic extrusion structure, and the fluoroplastic has high heat resistance due to the fact that fluorine atoms are contained in the molecular structure of the fluoroplastic, and is suitable for working in a temperature environment of 80-250 ℃ for a long time, and is not easy to deform in the vulcanizing process. The optical fiber sheath layer is of a fluoroplastic extrusion structure, and similarly, because fluorine atoms are contained in the molecular structure of the fluoroplastic, the fluoroplastic has high heat resistance, is suitable for working in a temperature environment of-80-250 ℃ for a long time, and is not easy to deform in the vulcanization processing process.
The inner sheath layer is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber.
The aramid yarn braiding layer is a braiding structure of aramid yarn outside the inner sheath layer. In the weaving structure of the aramid yarn weaving layer, the number of the weaving yarns is 5 in the forward direction and 5 in the reverse direction, the weaving pitch diameter ratio is about 3 times, and the weaving density is about 25%.
The outer sheath layer is an extrusion structure of EVM low-smoke halogen-free flame retardant rubber outside the aramid fiber woven layer, the outer sheath layer and the inner sheath layer are mutually embedded through the woven holes of the aramid fiber woven layer in the extrusion vulcanization process, the whole is formed, and the aramid fiber woven layer reinforces the sheath structure and the whole structure. The aramid fiber braided layer is used as a reinforcing structure, is different from the traditional metal (such as a stainless steel belt or a steel wire) for reinforcement, and particularly, the aramid fiber is used as a novel high-tech synthetic fiber, has the technical characteristics of ultrahigh strength, high modulus, high temperature resistance, acid resistance, alkali resistance, light weight and the like, has the strength of about 5-6 times that of the steel wire, the modulus of about 2-3 times that of the steel wire or the glass fiber, has the toughness of about 2 times that of the steel wire, and has the weight of only about 1/5 of the steel wire, and is not decomposed or melted even under the temperature environment of 560 ℃. The aramid fiber braided layer compounded between the inner sheath layer and the outer sheath layer according to the braided structure can cope with the external force applied to the cable from all directions, and has high structural strength.
The above examples are only intended to illustrate the present utility model, not to limit it.
Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art will understand that modifications may be made to the above embodiments or equivalents may be substituted for elements thereof without departing from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. An optical fiber composite cable for mobile equipment comprises a cable core composed of a plurality of power wire cores (1) and at least one optical fiber wire core (2);
the method is characterized in that:
the optical fiber cable comprises a plurality of power wire cores (1) of the cable core, wherein the optical fiber wire cores (2) of the cable core are arranged at the outer side twisting gaps of two adjacent power wire cores (1);
The outer part of the cable core is sequentially coated with an inner sheath layer (3), an aramid fiber woven layer (4) and an outer sheath layer (5) from inside to outside;
The braiding pitch diameter ratio of the aramid fiber yarn braiding layer (4) is less than or equal to 3 times, and the braiding density is more than or equal to 25%.
2. The optical fiber composite cable for mobile equipment according to claim 1, wherein:
the cable core consists of three power wire cores (1) and an optical fiber wire core (2);
the three power wire cores (1) are stranded together, and the optical fiber wire cores (2) are arranged at the outside stranded gaps of two adjacent power wire cores (1) at any position.
3. The optical fiber composite cable for mobile equipment according to claim 1 or 2, wherein:
The power wire core (1) is composed of a power conductor (11), and a semiconductive rubber inner shielding layer (12), an insulating layer (13), a semiconductive rubber outer shielding layer (14) and a reinforced shielding layer (15) which are sequentially coated outside the power conductor (11) from inside to outside.
4. A fiber optic composite cable for a mobile device according to claim 3, wherein:
the power conductor (11) is formed by twisting a plurality of strands of tin-plated copper wires in a concentric circle arrangement structure;
Each tinned copper wire is formed by twisting a plurality of tinned copper wire bundles with the diameters of 0.3-0.5 mm, and the twisting direction of the tinned copper wires is opposite to the twisting direction of the power conductor (11).
5. A fiber optic composite cable for a mobile device according to claim 3, wherein:
The insulating layer (13) is of an extrusion structure of hard ethylene propylene rubber.
6. A fiber optic composite cable for a mobile device according to claim 3, wherein:
The reinforced shielding layer (15) is a mixed braiding structure of tin-plated copper wires and aramid fibers outside the semiconductive rubber outer shielding layer (14), and the braiding density is more than or equal to 85%.
7. The optical fiber composite cable for mobile equipment according to claim 1 or 2, wherein:
The optical fiber core (2) is formed by twisting a plurality of optical fiber units (21) around a central reinforcing core (22), and an optical fiber sheath layer (23) extruded outside the core;
The optical fiber sheath layer (23) is of a fluoroplastic extrusion structure.
8. The fiber optic composite cable for a mobile device according to claim 7, wherein:
The optical fiber unit (21) is composed of a plurality of optical fiber conductors (211) penetrating into a sleeve layer (213) and optical fiber ointments (212) filled in the sleeve layer (213);
The optical fiber conductor (211) is a G.657 bending loss insensitive optical fiber;
the sleeve layer (213) is a fluoroplastic extruded structure.
9. The optical fiber composite cable for mobile equipment according to claim 1, wherein:
the inner sheath layer (3) is of an extrusion structure of EVM low-smoke halogen-free flame retardant rubber;
the outer sheath layer (5) is of an extrusion structure of EVM low-smoke halogen-free flame retardant rubber;
The inner sheath layer (3) and the outer sheath layer (5) are mutually embedded through the aramid fiber yarn weaving layer (4).
10. The optical fiber composite cable for mobile equipment according to claim 1, wherein:
the rated voltage of the optical fiber composite cable is 8.7/10kV at most.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202422042535.7U CN223427272U (en) | 2024-08-22 | 2024-08-22 | Optical fiber composite cable for mobile equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202422042535.7U CN223427272U (en) | 2024-08-22 | 2024-08-22 | Optical fiber composite cable for mobile equipment |
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