A green novel basalt fiber mechanical performance cable

Abstract

The utility model belongs to cable technical field discloses a kind of green novel basalt fiber mechanical property cable, it includes core, basalt fiber tape, inner protective layer, aluminium foil layer and outer jacket, wherein, basalt fiber tape, inner protective layer, aluminium foil layer, first basalt fiber braiding layer and outer jacket concentrically set and are sequentially covered from inside to outside in the periphery of core;Basalt fiber bulk yarn is also filled between core and basalt fiber tape. The structure of the utility model can reduce cable weight, optimize conductor resistance, reduce cable cost, improve cable use and processability, more convenient when laying and installing, and green and environmental protection, drag chain test number is increased from 1000 million times to 1200 million times, improve the overall mechanical property of cable, and strong practicality.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a kind of green novel basalt fiber mechanical property cable. BACKGROUND

[0002] Cable is one of indispensable infrastructure in modern society, which is widely used in various fields, with the functions of controlling installation, connecting equipment and transmitting power. With the progress of technology and the expansion of application fields, the performance and quality of cable will continue to improve to meet higher level needs.

[0003] The mechanical properties of cable have a crucial influence on the normal operation of circuit, service life, safety and meeting the needs of specific application scenarios. In the transportation, installation and use process of cable, it will be subjected to external forces such as bending, extrusion and stretching. If the mechanical properties of cable are poor, it may cause circuit short circuit and open circuit failure, affecting the normal operation of equipment. In addition, the poor mechanical properties of cable cannot resist the damage of external force, which may cause damage and failure due to external force, thereby reducing the service life of cable. SUMMARY

[0004] The utility model aims at providing a kind of green novel basalt fiber mechanical property cable, which is simple in structure, easy to realize, green and environmentally friendly, good in mechanical properties and strong in practicality.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a kind of green novel basalt fiber mechanical property cable, which comprises a core, a basalt fiber tape, an inner protective layer, an aluminum foil layer and an outer protective jacket. The basalt fiber tape, the inner protective layer, the aluminum foil layer, the first basalt fiber braided layer and the outer protective jacket are concentrically arranged and sequentially wrapped around the periphery of the core from inside to outside. The core and the basalt fiber tape are also filled with basalt fiber bulk yarn.

[0006] Further, the core comprises a center layer basalt fiber braided wire, and further comprises a first conductor, a second basalt fiber braided layer, a second conductor, a third basalt fiber braided layer and an insulating layer, which are concentrically arranged and sequentially wrapped around the periphery of the center layer basalt fiber braided wire from inside to outside.

[0007] Further, the first conductor is a twisted aluminum alloy conductor, and the diameter of the aluminum alloy monofilament in the twisted aluminum alloy conductor is ≤0.30mm.

[0008] Further, the second conductor is a twisted copper alloy conductor, and the diameter of the copper alloy monofilament in the twisted copper alloy conductor is ≤0.12mm.

[0009] Further, the filling volume of the basalt fiber bulk yarn accounts for 10%-60% of the inner cavity volume of the basalt fiber tape.

[0010] Further, the number of wire cores is two or more, and adjacent wire cores are tangent to each other.

[0011] The basalt fiber used in the utility model has excellent mechanical properties, has excellent temperature impact resistance, can maintain stable mechanical properties under extreme temperature conditions, and in particular, has mechanical properties far higher than other inorganic fiber materials in low temperature and extremely low temperature environments. The basalt fiber used also has good mechanical property indexes such as elastic modulus and elongation at break, and these properties enable the basalt fiber to maintain good elasticity and toughness when subjected to external forces and are not prone to breaking or deforming.

[0012] In addition, the utility model uses basalt fiber as a functional material, and the main component is a natural inorganic material, which is more environmentally friendly than organic polymer materials commonly used in cables, and basalt is a product of volcanic activity, and the "greenhouse" gas that may be released during fiber processing has been discharged during magma eruption hundreds of years ago, and the waste can be naturally weathered and degraded. In addition, the product after burning or high temperature of basalt is still basalt, instead of carbon dioxide and other toxic and harmful substances produced by burning other organic matter, which has 100% inertness, no toxic reaction with air and water, and does not burn and explode.

[0013] The utility model has the advantages that the structure of the utility model can reduce the weight of the cable, optimize the conductor resistance, reduce the cost of the cable, improve the use and processing of the cable, and is more convenient to lay and install, is green and environmentally friendly, the number of times of the drag chain test is increased from 10 million times to 12 million times, the overall mechanical properties of the cable are improved, and the utility model has high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the utility model will be further described in combination with the drawings and embodiments, and the drawings in the following description are only part of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor:

[0015] Figure 1 It is a cross-sectional view of the cable of the utility model.

[0016] Figure 2 It is Figure 1 It is an enlarged view of the wire core.

[0017] In the figure: 1. wire core; 2. basalt fiber tape; 3. inner protective layer; 4. aluminum foil layer; 5. first basalt fiber braided layer; 6. outer protective sheath; 7. basalt fiber bulk yarn;

[0018] 101. Central layer basalt fiber braided wire; 102. First conductor; 103. Second basalt fiber braided layer; 104. Second conductor; 105. Third basalt fiber braided layer; 106. Insulation layer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] like Figures 1 to 2 As shown, a novel green basalt fiber cable with high mechanical strength includes a core 1, a basalt fiber wrapping tape 2, an inner sheath 3, an aluminum foil layer 4, and an outer sheath 6. The basalt fiber wrapping tape 2, the inner sheath 3, the aluminum foil layer 4, the first basalt fiber braided layer 5, and the outer sheath 6 are concentrically arranged and sequentially wrap around the core 1 from the inside out. Basalt fiber bulked yarn 7 is also filled between the core 1 and the basalt fiber wrapping tape 2.

[0021] The cable of this invention is an electrical cable, in which the core 1 primarily transmits current and electrical energy. Basalt fiber possesses strength comparable to high-strength S-type glass fiber and tensile strength equivalent to T300 carbon fiber. The basalt fiber wrapping tape 2, wrapped around the core 1, provides insulation, preventing current leakage and ensuring cable safety. It also effectively shields against electromagnetic interference, protecting the internal signal transmission from external interference and ensuring the stability and reliability of signal transmission. Furthermore, it provides fire and moisture protection, preventing physical damage and environmental corrosion to the core 1, thus effectively extending the cable's lifespan. When the cable is bent, twisted, or subjected to external pulling forces, the basalt fiber wrapping tape 2 can also disperse stress, preventing damage to the core 1. The inner sheath 3 is made of environmentally friendly, ultra-flexible polypropylene, which ensures support and fixation between the cores 1, preventing misalignment.

[0022] The outer jacket 6 in the utility model mainly protects the internal structural components of the cable from external factors, prevents the internal structure of the cable from being damaged, and thus prolongs the service life of the cable. The material of the outer jacket 6 is a material commonly used in the prior art. When selecting the material of the outer jacket 6, a material with good durability needs to be selected to ensure that the cable can still work normally under harsh conditions. In actual selection, the mechanical properties, electrical insulation properties, heat aging resistance, chemical stability, environmental protection and safety and other factors of the material should be considered according to the specific use environment and performance requirements of the cable. For example, the polyurethane (PUR) jacket has excellent mechanical properties and is suitable for occasions requiring dynamic movement and bending requirements; and the polyvinyl chloride (PVC) jacket is widely used in various cables due to its low cost, good flexibility and durability.

[0023] In an embodiment of the utility model, the outer jacket 6 is a semi-extruded coated vinyl chloride (PVC) material. PVC has good electrical insulation and flame retardant properties, high resistance to various chemicals, and high mechanical strength, which can meet the needs of various application scenarios.

[0024] In another embodiment of the utility model, the outer jacket 6 is a semi-extruded coated irradiation cross-linked polyolefin (XLPO) material. XLPO has high strength, corrosion resistance, wear resistance, aging resistance, thermal stability and chemical stability, and can flexibly adapt to different product design and manufacturing requirements.

[0025] The basalt fiber bulk yarn 7 filled between the online core 1 and the basalt fiber tape 2 in the utility model can fill the gap between the online core 1 and the basalt fiber tape 2. In actual processing, the basalt fiber bulk yarn 4 itself is triangular or multi-edge prismatic or other special-shaped filling embedded between the gap between the first basalt fiber tape 1 and the special-shaped filling embedded core, which can play a supporting role, ensure the overall roundness of the cable shape, and improve the overall aesthetics of the cable. It can also prevent the online core 1 of the cable from loosening and deforming. In addition, the basalt fiber bulk yarn 7 in the utility model has strong mechanical properties and fireproof and moistureproof properties, which can improve the overall mechanical strength and stability of the cable. In the utility model, the filling volume of the basalt fiber bulk yarn 7 accounts for 10%-60% of the internal cavity volume of the basalt fiber tape 2.

[0026] Currently, similar products commonly found on the market use flame-retardant tape with a thickness of 0.15mm. This invention processes the thickness of the basalt fiber wrapping tape 2 to 0.08-0.10mm, preferably 0.09mm. The thinner thickness effectively improves work efficiency and reduces the number of times the wrapping tape needs to be changed. The weaving density of the basalt fiber wrapping tape 2 is optimized from about 85% to 100%, which can effectively improve its flame-retardant performance from Class B to Class A. At the same time, it can enhance the mechanical performance of laying and installation, effectively avoid the phenomenon of conductor breakage during installation and reduce the friction between the tape and the sheath layer.

[0027] The basalt fiber wrapping tape 2 in this invention has a thickness of 0.01mm, while traditional similar products use at least two layers of synthetic mica tape with a thickness ≥0.14mm. Compared with traditional products, the basalt fiber wrapping tape 2 used in this invention reduces raw material costs by up to 15%.

[0028] like Figure 1 As shown, in this invention, there are two or more cores 1, with adjacent cores 1 being tangent to each other. The two or more cores 1 completely fill the inner cavity of the basalt fiber wrapping tape 2. This method ensures the overall roundness of the cable's shape and enhances its tensile strength. In a preferred embodiment of this invention, there are seven cores 1, one of which is located at the center line of the cable, and the remaining six are evenly distributed around the center core 1, with the six outer cores 1 all tangent to the inner wall of the basalt fiber wrapping tape 2. In this embodiment, the gaps between each core 1 are also filled with basalt fiber bulked yarn 7.

[0029] like Figure 2 As shown, the core 1 includes a central basalt fiber braided wire 101, and also includes a first conductor 102, a second basalt fiber braided layer 103, a second conductor 104, a third basalt fiber braided layer 105 and an insulation layer 106, which are concentrically arranged and sequentially wrapped around the central basalt fiber braided wire 101 from the inside out.

[0030] In this invention, basalt fiber is used as the center of the core 1, which makes the overall tensile strength of the core 1 higher. Although it is set in the center of the core 1, it is not used to transmit current, but mainly for the strength and durability of the core 1.

[0031] The braiding density of the central basalt fiber braided wire 101, the first basalt fiber braided layer 5, the second basalt fiber braided layer 103, and the third basalt fiber braided layer 105 is ≥98%. Basalt fiber braided layers with this density can effectively isolate flames and increase the longitudinal tensile strength of the cable, effectively preventing conductor breakage during installation and laying, and also providing better fire resistance and moisture resistance.

[0032] The first conductor 102 is a twisted aluminum alloy conductor, and is a super-soft aluminum alloy conductor, which has excellent flexibility, does not crack even after repeated stress, reduces the safety hazard generated in the installation process, and also makes the aluminum alloy cable easier to bend, reduces the space of the installation layout, and reduces the installation cost. Although the conductivity of the aluminum alloy is not as good as that of copper, the specific resistance and electrical quality per unit length are relatively superior due to the smaller density.

[0033] The second conductor 104 is a twisted copper alloy conductor, and is a copper alloy conductor. The use of the copper alloy conductor significantly improves the mechanical strength and conductivity of the entire cable, reduces resistance loss, improves power transmission efficiency, and the anti-oxidation performance of the copper alloy conductor is better than that of the aluminum alloy conductor. In a humid or high-temperature environment, the copper alloy conductor can effectively prevent oxidation reaction from occurring, and maintain the stability and reliability of the cable.

[0034] In actual processing, the diameter of the aluminum alloy conductor monofilament is optimized from the conventional 0.5-0.7 mm to ≤0.30 mm, further improving the tensile strength of the aluminum alloy conductor as a whole and enhancing the overall flexibility. The diameter of the copper alloy conductor monofilament is optimized from the conventional 0.21-0.31 mm to ≤0.12 mm, the elongation at break is increased to ≥35%, and the monofilament specific resistance is reduced to ≤0.016900 Ω·mm 2 / m. The center layer basalt fiber woven wire 101 + aluminum alloy monofilament + second basalt fiber woven layer 103 + copper monofilament are complexed and formed, and when pot annealing is performed together, the advantages of the basalt fiber monofilament in high temperature resistance are fully embodied, the troubles of secondary annealing are reduced, the weight of the cable is also reduced, and the cost is reduced. The traditional woven layer mainly uses aramid fiber, and is only added in the form of a wire outside the center layer of the twisted conductor. The weaving strength of the second basalt fiber woven layer 103 in the utility model is high, and the second basalt fiber woven layer 103 in the utility model can play a supporting and buffering role, and reduce the wear and tear between the first conductor 102 and the second conductor 104.

[0035] The insulation layer 106 in the utility model is tightly covered on the surface of the third basalt fiber woven layer 105, can effectively increase the adhesion of the insulation layer 106, make the insulation wire core 1 more round, the insulation thickness is uniform, and the concentricity between the insulation layer 106 and the center layer basalt fiber woven wire 101 is ≥85%, which can effectively reduce the outer diameter of the insulation wire core 1 to 0.01 mm.

[0036] The product of the utility model is tested for mechanical fatigue resistance according to the Chinese Robot Industry Alliance standard CRIA0003, and the test result is that the number of times of the cable drag chain test is 120 million times. The number of times of the cable drag chain test on the market is 100 million times, and the number of times of the cable drag chain test of the utility model is 120 million times, which greatly improves the overall mechanical performance of the cable and has strong practicality.

[0037] The above detailed description of the specific implementation of the present application has further detailed the purpose, technical solution and beneficial effects of the present application. It should be understood that the above description is only a specific implementation method of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement, etc. within the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A green novel basalt fiber mechanical resistant cable characterized in that, The cable comprises a core (1), a basalt fiber tape (2), an inner protective layer (3), an aluminum foil layer (4), a first basalt fiber woven layer (5), and an outer protective sheath (6), wherein the basalt fiber tape (2), the inner protective layer (3), the aluminum foil layer (4), and the outer protective sheath (6) are concentrically arranged and sequentially wrapped around the periphery of the core (1) from inside to outside; and the core (1) and the basalt fiber tape (2) are further filled with basalt fiber bulk yarn (7).

2. The green novel basalt fiber mechanical resistant cable according to claim 1, characterized in that, The core (1) comprises a center layer basalt fiber woven wire (101), and further comprises a first conductor (102), a second basalt fiber woven layer (103), a second conductor (104), a third basalt fiber woven layer (105), and an insulating layer (106) which are concentrically arranged and sequentially wrapped around the periphery of the center layer basalt fiber woven wire (101) from inside to outside.

3. The green novel basalt fiber mechanical resistant cable according to claim 2, characterized in that, The first conductor (102) is a stranded aluminum alloy conductor, and the diameter of the aluminum alloy monofilament in the stranded aluminum alloy conductor is less than or equal to 0.30 mm.

4. The green novel basalt fiber mechanical resistant cable according to claim 2 or 3, characterized in that, The second conductor (104) is a stranded copper alloy conductor, and the diameter of the copper alloy monofilament in the stranded copper alloy conductor is less than or equal to 0.12 mm.

5. The green novel basalt fiber mechanical resistant cable according to claim 1, 2 or 3, characterized in that, The filling volume of the basalt fiber bulk yarn (7) accounts for 10%-60% of the inner cavity volume of the basalt fiber tape (2).

6. The green novel basalt fiber mechanical resistant cable according to claim 4, characterized in that, The filling volume of the basalt fiber bulk yarn (7) accounts for 10%-60% of the inner cavity volume of the basalt fiber tape (2).

7. The green novel basalt fiber mechanical resistant cable according to claim 1, 2, 3 or 6, characterized in that, The number of the core (1) is two or more, and the adjacent cores (1) are tangent to each other.

8. The green novel basalt fiber mechanical resistant cable according to claim 4, characterized in that, The number of the core (1) is two or more, and the adjacent cores (1) are tangent to each other.

9. The green novel basalt fiber mechanical resistant cable according to claim 5, characterized in that, The number of the core (1) is two or more, and the adjacent cores (1) are tangent to each other.

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