Green novel basalt fiber fireproof cable

Abstract

The utility model belongs to the technical field of cables, and discloses a novel green basalt fiber fire-resistant cable, which comprises a cable core, a first basalt fiber wrapping tape and an outer sheath, and is characterized in that the first basalt fiber wrapping tape and the outer sheath are concentrically arranged and sequentially wrap the periphery of the cable core from inside to outside; and basalt fiber bulked yarns are also filled between the wire cores and the first basalt fiber wrapping tape. By adopting the structure of the utility model, the overall weight of the cable can be reduced, the conductor resistance can be optimized, the cost of the cable can be reduced, the use and processing performance of the cable can be improved, the cable is lighter and more environment-friendly during laying and installation, the fire-resistant and flame-retardant performance of the cable can be greatly improved, and the practicability is strong.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a green novel basalt fiber fire-resistant cable. Background Technology

[0002] With the rapid development of technology, life has become more and more convenient, but fires are becoming more and more frequent. The main reasons for the frequent fires include aging wires, unauthorized wiring, electrical equipment failure, overloading of electrical appliances, improper use of gas, children playing with fire, and poor management of flammable and explosive materials.

[0003] Cables are widely used in power, communications, transportation, and construction, playing an indispensable role in daily life. Therefore, cable safety is crucial for all sectors. If cables are burned in a fire, it can lead to a series of adverse consequences. For example, it may cause a fire, especially if the cable contains flammable materials or its insulation is damaged; burned cables may expose live parts, increasing the risk of electric shock, particularly in humid or conductive environments; burning cables are often accompanied by short circuits or overloads, which can damage or malfunction connected equipment; and during combustion, cables may release toxic gases, posing a threat to the environment and human health.

[0004] As can be seen from the above analysis, if the cable is burned, it will cause serious safety problems, as well as equipment damage, communication interruption and economic losses. Utility Model Content

[0005] The purpose of this utility model is to provide a new type of green basalt fiber fire-resistant cable, which has a simple structure, is easy to implement, is environmentally friendly, has good fire resistance and flame retardant properties, and is highly practical.

[0006] To achieve the above objectives, this utility model provides a novel green basalt fiber fire-resistant cable, comprising a core, a first basalt fiber wrapping tape, and an outer sheath, wherein the first basalt fiber wrapping tape and the outer sheath are concentrically arranged and sequentially wrap around the core from the inside out; basalt fiber bulked yarn is also filled between the core and the first basalt fiber wrapping tape.

[0007] Furthermore, the wire core includes a first conductor, a second conductor arranged concentrically and sequentially wrapped around the periphery of the first conductor from the inside out, and an insulation layer.

[0008] Furthermore, the conductor also includes a second basalt fiber wrapping, which covers the outer periphery of the insulation layer.

[0009] Further, the wire core further comprises a first basalt fiber woven layer, a second basalt fiber tape and a second basalt fiber woven layer; the first basalt fiber woven layer is arranged between the first conductor and the second conductor, the second basalt fiber tape is arranged between the second conductor and the insulating layer, and the second basalt fiber woven layer is arranged between the second basalt fiber tape and the insulating layer.

[0010] Further, the thickness of the first basalt fiber tape and the second basalt fiber tape is 0.08-0.10mm.

[0011] Further, the filling volume of the basalt fiber bulk yarn accounts for 10%-60% of the cavity volume of the first basalt fiber tape.

[0012] Further, a third basalt fiber woven layer is arranged between the first basalt fiber tape and the outer sheath.

[0013] The basalt fiber is used as a functional material, and the main component is a natural inorganic material, which is more environmentally friendly than the organic polymer material commonly used in cables, and the basalt is a product of volcanic activity, and the "greenhouse" gas that may be released in the fiber processing process has been discharged in the magma eruption process hundreds of years ago, and the waste can be naturally weathered and degraded. In addition, the product of basalt combustion or high temperature is still basalt, instead of carbon dioxide and other toxic and harmful substances produced by combustion of other organic matter, which has 100% inertness, no toxic reaction with air and water, and does not burn and explode.

[0014] The cable structure of the utility model has the advantages of reducing the overall weight of the cable, optimizing the conductor resistance, reducing the cost of the cable, improving the use and processing performance of the cable, being more convenient to lay and install, being green and environmentally friendly, greatly improving the fire resistance and flame resistance of the cable, and being practical. BRIEF DESCRIPTION OF DRAWINGS

[0015] 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. The drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor:

[0016] Figure 1 Fig. 1 is a cross-sectional view of a cable in the embodiment 1 of the utility model.

[0017] Figure 2 Fig. 2 is a cross-sectional view of a cable in the embodiment 2 of the utility model.

[0018] Figure 3 Fig. 3 is a cross-sectional view of a cable in the embodiment 3 of the utility model. Figure 2An enlarged schematic view of the central core.

[0019] In the figure: 1. first basalt fiber tape; 2. second basalt fiber tape; 3. outer sheath; 4. basalt fiber bulk yarn; 5. first conductor; 6. second conductor; 7. insulation layer; 8. first basalt fiber woven layer; 9. second basalt fiber woven layer; 10. third basalt fiber woven layer. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the following will combine the technical scheme in the embodiments of the utility model for clear and complete description, obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0021] Embodiment 1

[0022] As Figure 1 shown, a kind of green novel basalt fiber fire-resistant cable, including core, first basalt fiber tape 1 and outer sheath 3, wherein, first basalt fiber tape 1 and outer sheath 3 concentrically are set and are covered in order from inside to outside on the periphery of core;Core and first basalt fiber tape 1 between it is also filled with basalt fiber bulk yarn 4.

[0023] The cable of the embodiment is cable, wherein the main role of core is to transmit current and electric energy.Basalt fiber has comparable strength with high-strength S-shaped glass fiber, and tensile strength comparable to T300 carbon fiber, first basalt fiber tape 1 in the embodiment is wrapped outside core, which can play the role of insulation, prevent current leakage and ensure the safety of cable;It can also effectively shield electromagnetic interference, protect the signal transmission inside cable from external interference, ensure the stability and reliability of signal transmission;It can also play the role of fireproof and moistureproof, avoid physical damage and environmental erosion of core, thereby effectively prolonging the service life of cable.When electric wire and cable are bent, twisted or subjected to external force pulling, first basalt fiber tape 1 can also disperse stress, thereby preventing core from being damaged.

[0024] The outer sheath 3 in the embodiment 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 sheath 3 is a material commonly used in the prior art. When selecting the material of the outer sheath 3, 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 fully considered according to the specific use environment and performance requirements of the cable. For example, polyurethane (PUR) sheath has excellent mechanical properties and is suitable for occasions requiring dynamic movement and bending requirements; and polyvinyl chloride (PVC) sheath is widely used in various cables due to its low cost, good flexibility and durability.

[0025] In one embodiment of the embodiment, the outer sheath 3 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.

[0026] In another embodiment of the embodiment, the outer sheath 3 is a semi-extruded coated irradiation cross-linked polyolefin (XLPO) material. XLPO has excellent properties such as high strength, corrosion resistance, wear resistance, aging resistance, thermal stability and chemical stability, and can flexibly adapt to different product design and manufacturing requirements.

[0027] The basalt fiber bulk yarn 4 filled between the core and the first basalt fiber tape 1 in the embodiment can fill the gap between the core and the first basalt fiber tape 1. In actual processing, the basalt fiber bulk yarn 4 itself is triangular or multi-edge prismatic and is inserted into the gap between the embedded core and the first basalt fiber tape 1, which can play a supporting role, ensure the overall roundness of the cable shape, and improve the overall aesthetics of the cable. In addition, the basalt fiber bulk yarn 4 in the embodiment has strong mechanical properties and fireproof and moistureproof properties, which can improve the overall mechanical strength and stability of the cable. In the embodiment, the filling volume of the basalt fiber bulk yarn 4 accounts for 10%-60% of the inner cavity volume of the first basalt fiber tape 1.

[0028] In the embodiment, the number of cores is more than one, which needs to be selected according to actual conditions. In one embodiment of the embodiment, the number of cores is three, and the three cores are tangent to each other.

[0029] The wire core comprises the first conductor 5, further comprises the second conductor 6 and the insulation layer 7 which are concentrically arranged and sequentially cover the periphery of the first conductor 5 from inside to outside, and further comprises the second basalt fiber tape 2 which covers the periphery of the insulation layer 7.

[0030] The second conductor 6 in the embodiment is stranded on the first conductor 5, wherein the single-wire diameter of the first conductor 5 is ≤0.45 mm, the single-wire diameter of the second conductor 6 is ≤0.18 mm, the first conductor 5 is an aluminum alloy, and the second conductor 6 is copper. The center conductor adopts the mode of aluminum-coated copper, which can improve its conductivity, and copper as the outer layer can effectively transmit current, while the aluminum core provides lower cost and lighter weight. In addition, aluminum is more susceptible to corrosion than copper, and the design of the copper-coated aluminum wire in the embodiment can protect the aluminum core from environmental erosion. The copper layer acts as a barrier to reduce the direct contact of the aluminum core with the environment, thereby improving the corrosion resistance of the cable; and the copper layer can also provide additional mechanical strength, enabling the cable to withstand greater tension and pressure.

[0031] In actual processing, the diameter of the aluminum alloy conductor single wire is optimized from the conventional 0.5-0.7 mm to ≤0.40 mm, further improving the overall tensile strength of the aluminum alloy conductor and enhancing the overall flexibility. The diameter of the copper alloy conductor single wire is optimized from the conventional 0.21-0.31 mm to ≤0.18 mm, the elongation at break is increased to ≥35%, and the single-wire resistivity is reduced to ≤0.016900 Ω·mm 2 / m. The center conductor is directly formed by once stranding aluminum alloy single wire + copper single wire, and tank annealing is performed together, reducing the trouble of secondary stranding and secondary annealing.

[0032] The insulation layer 7 in the embodiment tightly covers the surface of the center conductor, effectively increasing the adhesion of the insulation layer 7, making the insulation wire core more round, the insulation thickness uniform, and the concentricity between the insulation layer 7 and the first conductor 5 ≥85%, which can effectively reduce the outer diameter of the insulation wire core to 0.01 mm; the outer covering of the insulation layer 7 with the second basalt fiber tape 2 can effectively improve the flame retardant performance. The thickness of the flame-retardant tape of the commonly used similar products on the market is 0.15 mm, and the thickness of the basalt fiber tape in the embodiment is processed to 0.08-0.10 mm, and preferably 0.09 mm. After the thickness is thinned, the working efficiency is effectively improved, and the number of rewinding tape is reduced; the weaving density of the basalt fiber tape is optimized from ≥85% to 100%, which can effectively improve the flame retardant performance from B class to A class.

[0033] The structure of the embodiment can reduce the overall weight of the cable, optimize the conductor resistance, reduce the cost of the cable, improve the use and processing performance of the cable, and make the laying and installation more convenient, meeting the A class in GB / T19666-2019 Flame Retardant and Fire Resistant Wire and Cable or Optical Cable General.

[0034] Embodiment 2

[0035] As shown in Figure 2 and Figure 3 A green new basalt fiber fire-resistant cable includes a core, a first basalt fiber tape 1 and an outer sheath 3, wherein the first basalt fiber tape 1 and the outer sheath 3 are concentrically arranged and sequentially wrapped outside the core from inside to outside; and a basalt fiber bulk yarn 4 is filled between the core and the first basalt fiber tape 1.

[0036] The core includes a first conductor 5, and further includes a second conductor 6 and an insulating layer 7 which are concentrically arranged and sequentially wrapped outside the first conductor 5 from inside to outside.

[0037] The core further includes a first basalt fiber woven layer 8, a second basalt fiber tape 2 and a second basalt fiber woven layer 9; wherein the first basalt fiber woven layer 8 is arranged between the first conductor 5 and the second conductor 6, the second basalt fiber tape 2 is arranged between the second conductor 6 and the insulating layer 7, and the second basalt fiber woven layer 9 is arranged between the second basalt fiber tape 2 and the insulating layer 7.

[0038] The cable of the embodiment is an electric cable, wherein the core mainly functions to transmit current and electric energy. The basalt fiber has a strength comparable to that of high-strength S-type glass fiber and a tensile strength comparable to that of T300-type carbon fiber. The first basalt fiber tape 1 and the third basalt fiber woven layer 10 in the embodiment wrapped outside the core can function as insulation to prevent current leakage and ensure the safety of the cable. They can also effectively shield electromagnetic interference, protect the signal transmission inside the cable from external interference, and ensure the stability and reliability of signal transmission. They can also function as fireproof and moistureproof, avoiding physical damage and environmental erosion to the core, thereby effectively prolonging the service life of the cable. When the electric wire or cable is bent, twisted or subjected to external force, the first basalt fiber tape 1 can disperse stress, thereby preventing damage to the core. The first basalt fiber woven layer can provide excellent mechanical protection for the cable, enhance the tensile strength of the cable, make the cable more robust and durable, and prevent it from being damaged during use.

[0039] The outer sheath 3 in the embodiment 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 sheath 3 is a material commonly used in the prior art. When selecting the material of the outer sheath 3, a material with good durability should be selected to ensure that the cable can still work normally under harsh conditions. In actual selection, the specific use environment and performance requirements of the cable should be considered, and factors such as mechanical properties, electrical insulation properties, heat aging resistance, chemical stability, environmental protection and safety should be fully considered. For example, polyurethane (PUR) sheath has excellent mechanical properties and is suitable for occasions requiring dynamic movement and bending requirements; and polyvinyl chloride (PVC) sheath is widely used in various cables due to its low cost, good flexibility and durability.

[0040] In one embodiment of the embodiment, the outer sheath 3 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.

[0041] In another embodiment of the embodiment, the outer sheath 3 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.

[0042] The basalt fiber bulk yarn 4 filled between the core and the first basalt fiber tape 1 in the embodiment can fill the gap between the core and the first basalt fiber tape 1, ensure the overall roundness of the cable shape, and improve the overall aesthetics of the cable. In addition, the basalt fiber bulk yarn 4 in the embodiment has strong mechanical properties and fireproof and moistureproof properties, which can improve the overall mechanical strength and stability of the cable. In the embodiment, the filling volume of the basalt fiber bulk yarn 4 accounts for 10%-60% of the inner cavity volume of the first basalt fiber tape 1.

[0043] In the embodiment, the number of cores is more than one, which should be selected according to actual conditions. In one embodiment of the embodiment, the number of cores is three, and the three cores are tangent to each other.

[0044] The first conductor 5 in the embodiment is a stranded conductor, and the monofilament diameter of the first conductor 5 is ≤0.45 mm. The material of the first conductor 5 is a super-soft aluminum alloy conductor, which has excellent flexibility and will not crack even after repeated stress, thereby reducing the safety hazards in the installation process, making the aluminum alloy cable easier to bend, reducing the space of the installation layout, and reducing 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.

[0045] The second conductor 6 in the embodiment is stranded outside the first basalt fiber braid layer 8, and the diameter of the monofilament of the second conductor 6 is ≤0.2 mm. The second conductor 6 is a copper alloy conductor, and the use of the copper alloy conductor in the embodiment 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 superior to that of the aluminum alloy conductor. In harsh environments such as humidity or high temperature, the copper alloy conductor can effectively prevent oxidation reactions from occurring, maintaining the stability and reliability of the cable.

[0046] The weaving density of the third basalt fiber braid layer 10, the first basalt fiber braid layer 8, and the third basalt fiber layer in the embodiment is all ≥98%. The basalt fiber braid layer with the above density can effectively isolate flames and increase the longitudinal tensile strength of the cable, effectively avoiding the phenomenon of conductor breakage during installation and laying, and better fire resistance.

[0047] In actual processing, the diameter of the aluminum alloy conductor monofilament is optimized from 0.5-0.7 mm to ≤0.45 mm, further improving the overall tensile strength of the aluminum alloy conductor and enhancing the overall flexibility. The copper alloy conductor monofilament diameter is optimized from the original 0.21-0.31 mm to ≤0.2 mm, the elongation at break is increased to ≥35%, and the monofilament specific resistance is reduced to ≤0.016900 Ω·mm 2 / m. The aluminum alloy monofilament, the first basalt fiber braid layer 8, and the copper alloy monofilament are formed by complex twisting, and can fully utilize the high-temperature resistance of the basalt fiber during tank annealing together, reducing the trouble of secondary annealing.

[0048] The traditional braid layer mainly uses aramid fiber, and is only added in the form of a filament outside the stranded conductor center layer. The first basalt fiber braid layer 8 in the embodiment has high weaving strength and can play a supporting and buffering role, reducing the wear and tear between the first conductor 5 and the second conductor 6.

[0049] The first basalt fiber tape 1 and the second basalt fiber tape 2 in the embodiment have a thickness of 0.01 mm, and a conventional similar product adopts at least two layers of synthetic mica tape with a thickness of greater than or equal to 0.14 mm. Compared with the conventional product, the first basalt fiber tape 1 used in the embodiment reduces the raw material cost to 15%.

[0050] The structure of the embodiment can reduce the overall weight of the cable, optimize the conductor resistance, reduce the cost of the cable, improve the use and processing performance of the cable, and make the laying and installation more convenient. The fire supply temperature is increased from 750-800 DEG C to 850-900 DEG C, and the 90+15 min test is passed.

[0051] The above specific embodiments further illustrate the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above description is only a specific implementation method of the utility model, and is not used to limit the utility model. Any modification, equivalent replacement and improvement within the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A novel green basalt fiber fire-resistant cable, characterized in that, It includes a core, a first basalt fiber wrapping tape (1) and an outer sheath (3), wherein the first basalt fiber wrapping tape (1) and the outer sheath (3) are concentrically arranged and wrap around the core from the inside to the outside; the core and the first basalt fiber wrapping tape (1) are also filled with basalt fiber bulk yarn (4).

2. The green novel basalt fiber fire-resistant cable according to claim 1, characterized in that, The wire core includes a first conductor (5), a second conductor (6) arranged concentrically and sequentially wrapped around the first conductor (5) from the inside out, and an insulation layer (7).

3. The green novel basalt fiber fire-resistant cable according to claim 2, characterized in that, The conductor also includes a second basalt fiber wrapping (2), and the second basalt fiber wrapping (2) covers the outer periphery of the insulation layer (7).

4. The green novel basalt fiber fire-resistant cable according to claim 2, characterized in that, The wire core also includes a first basalt fiber braided layer (8), a second basalt fiber wrapping tape (2), and a second basalt fiber braided layer (9); wherein, the first basalt fiber braided layer (8) is disposed between the first conductor (5) and the second conductor (6), the second basalt fiber wrapping tape (2) is disposed between the second conductor (6) and the insulation layer (7), and the second basalt fiber braided layer (9) is disposed between the second basalt fiber wrapping tape (2) and the insulation layer (7).

5. The green novel basalt fiber fire-resistant cable according to claim 3 or 4, characterized in that, The thickness of the first basalt fiber wrapping tape (1) and the second basalt fiber wrapping tape (2) is 0.08-0.10 mm.

6. The green novel basalt fiber fire-resistant cable according to claim 1, 2, 3 or 4, characterized in that, The filling volume of the basalt fiber bulk yarn (4) accounts for 10%-60% of the inner cavity volume of the first basalt fiber wrapping tape (1).

7. The green novel basalt fiber fire-resistant cable according to claim 5, characterized in that, The filling volume of the basalt fiber bulk yarn (4) accounts for 10%-60% of the inner cavity volume of the first basalt fiber wrapping tape (1).

8. The green novel basalt fiber fire-resistant cable according to claim 1, 2, 3, 4 or 7, characterized in that, A third basalt fiber braided layer (10) is provided between the first basalt fiber wrapping tape (1) and the outer sheath (3).

9. The green novel basalt fiber fire-resistant cable according to claim 5, characterized in that, A third basalt fiber braided layer (10) is provided between the first basalt fiber wrapping tape (1) and the outer sheath (3).

10. The green novel basalt fiber fire-resistant cable according to claim 6, characterized in that, A third basalt fiber braided layer (10) is provided between the first basalt fiber wrapping tape (1) and the outer sheath (3).

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