Novel green basalt fiber cable with mechanical property resistance

Abstract

The invention belongs to the technical field of cables, and discloses a novel environment-friendly basalt fiber cable with mechanical performance resistance, which comprises a cable core, a basalt fiber wrapping tape, an inner protective layer, an aluminum foil layer and an outer sheath, the basalt fiber wrapping tape, the inner protection layer, the aluminum foil layer, the first basalt fiber braid layer and the outer sheath are concentrically arranged and sequentially wrap the periphery of the wire core from inside to outside; basalt fiber bulked yarns are further filled between the wire cores and the basalt fiber wrapping tape. By adopting the structure, the weight of the cable can be reduced, the conductor resistance can be optimized, the cost of the cable can be reduced, the use and processability of the cable can be improved, the cable is lighter and more convenient to lay and install, the cable is green and environment-friendly, the drag chain test times are increased to 12 million times from 10 million times, the overall mechanical performance of the cable is improved, and the practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a new green basalt fiber cable with mechanical resistance. Background Art

[0002] Cables are one of the indispensable infrastructures in modern society. They are widely used in various fields and have the functions of controlling installation, connecting equipment and transmitting electricity. With the advancement of technology and the expansion of application fields, the performance and quality of cables will continue to improve to meet higher-level needs.

[0003] The mechanical properties of cables have a vital impact on the normal operation, service life, safety and meeting the requirements of specific application scenarios of the circuit. During the transportation, installation and use of cables, they will be subjected to external forces such as bending, squeezing and stretching. If the mechanical properties of the cables are poor, it may cause circuit short circuits and open circuits, affecting the normal operation of the equipment. In addition, poor mechanical properties of cables cannot resist the damage of external forces, and may cause damage and failures due to external forces, thereby reducing the service life of the cables. Summary of the invention

[0004] The purpose of the present invention is to provide a new type of green basalt fiber mechanical resistance cable, which has a simple structure, is easy to implement, is green and environmentally friendly, has good mechanical properties and is highly practical.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a green new type basalt fiber mechanical resistant cable, comprising a wire core, a basalt fiber tape, an inner protective layer, an aluminum foil layer and an outer sheath, wherein the basalt fiber tape, the inner protective layer, the aluminum foil layer, the first basalt fiber braided layer and the outer sheath are concentrically arranged and sequentially coated on the outer periphery of the wire core from the inside to the outside; basalt fiber bulked yarn is also filled between the wire core and the basalt fiber tape.

[0006] Furthermore, the wire core includes a central layer of basalt fiber braided wire, and also includes 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 central layer of basalt fiber braided wire from the inside to the outside.

[0007] Furthermore, the first conductor is a stranded aluminum alloy conductor, and the diameter of the aluminum alloy single wire in the stranded aluminum alloy conductor is ≤0.30 mm.

[0008] Furthermore, the second conductor is a stranded copper alloy conductor, and the diameter of the copper alloy single wire in the stranded copper alloy conductor is ≤0.12 mm.

[0009] Furthermore, the filling volume of the basalt fiber bulked yarn accounts for 10%-60% of the volume of the inner cavity of the basalt fiber package.

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

[0011] The basalt fiber used in the present invention has excellent mechanical properties, has excellent resistance to temperature shock, and can maintain stable mechanical properties under extreme temperature conditions, especially in low and extremely low temperature environments, its mechanical properties are much higher than other inorganic fiber materials. The basalt fiber used also has good mechanical performance indicators such as elastic modulus and elongation at break, which enable the basalt fiber to maintain good elasticity and toughness when subjected to external forces, and is not prone to breakage or deformation.

[0012] In addition, the present invention uses basalt fiber as a functional material, the main component of which is a natural inorganic material, which is more environmentally friendly than the organic polymer materials commonly used in cables. Basalt is a product of volcanic activity, and the "greenhouse" gases that may be released during fiber processing have been emitted during magma eruptions hundreds of years ago, and its waste can be naturally weathered and degraded. In addition, the product of basalt combustion or high temperature is still basalt, instead of producing carbon dioxide and other toxic and harmful substances like other organic combustion. It is 100% inert, has no toxic reaction with air and water, and does not burn and is explosion-proof.

[0013] The beneficial effects of the present invention are: the structure of the present invention can reduce the weight of the cable, optimize the conductor resistance, reduce the cable cost, improve the use and processability of the cable, make it lighter during laying and installation, and be green and environmentally friendly. The number of drag chain tests is increased from 10 million times to 12 million times, which improves the overall mechanical properties of the cable and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0015] Figure 1 Schematic diagram of a cross section of the cable of the present invention.

[0016] Figure 2 yes Figure 1 An enlarged schematic diagram of the center line core.

[0017] In the figure: 1. Wire core; 2. Basalt fiber wrapping tape; 3. Inner sheath; 4. Aluminum foil layer; 5. First basalt fiber braided layer; 6. Outer sheath; 7. Basalt fiber bulked 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 DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0020] like Figure 1 to Figure 2 As shown, a green new type of basalt fiber mechanical resistant cable includes a core 1, a basalt fiber tape 2, an inner protective layer 3, an aluminum foil layer 4 and an outer sheath 6, wherein the basalt fiber tape 2, the inner protective layer 3, the aluminum foil layer 4, the first basalt fiber braided layer 5 and the outer sheath 6 are concentrically arranged and sequentially wrapped around the outer periphery of the core 1 from the inside to the outside; the core 1 and the basalt fiber tape 2 are also filled with basalt fiber bulked yarn 7.

[0021] The cable of the present invention is an electric cable, wherein the main function of the core 1 is to transmit current and electric energy. 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 basalt fiber tape 2 of the present invention wrapped around the outside of the core 1 can play an insulating role, prevent current leakage, and ensure the safety of the cable; it 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; it can also play a role in fire prevention and moisture resistance, and avoid physical damage and environmental erosion of the core 1, thereby effectively extending the service life of the cable. When the wire and cable are bent, twisted, or pulled by external force, the basalt fiber tape 2 can also disperse stress, thereby preventing the core 1 from being damaged. The material of the inner sheath 3 is an environmentally friendly ultra-soft polypropylene material, which can ensure support and fixation between the cores 1 and prevent the cores from being dislocated.

[0022] The outer sheath 6 in the present invention is mainly used to protect the internal structural components of the cable from external factors and prevent the internal structure of the cable from being damaged, thereby extending the service life of the cable. The material of the outer sheath 6 is a commonly used material in the prior art. When selecting the material of the outer sheath 6, it is necessary to select a material with good durability to ensure that the cable can still work normally under harsh conditions. When actually selecting, a reasonable selection should be made based on the specific use environment and performance requirements of the cable, and full consideration should be given to factors such as the material's mechanical properties, electrical insulation properties, heat aging resistance, chemical stability, environmental protection, and safety. For example, a polyurethane (PUR) sheath has excellent mechanical properties and is suitable for occasions that require dynamic movement and bending requirements; while a polyvinyl chloride (PVC) sheath is widely used in various cables due to its low cost, good flexibility, and durability.

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

[0024] In another embodiment of the present invention, the outer sheath 6 is a semi-extruded coated radiation 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.

[0025] The basalt fiber bulked yarn 7 filled between the wire core 1 and the basalt fiber tape 2 of the present invention can fill the gap between the wire core 1 and the basalt fiber tape 2. During actual processing, the basalt fiber bulked yarn 4 itself fills the gap between the embedded wire core and the first basalt fiber tape 1 in a triangular or polygonal shape, which can play a supporting role, ensure the overall roundness of the cable shape, and enhance the overall beauty of the cable; it can also prevent the wire core 1 of the cable from loosening and deforming. In addition, the basalt fiber bulked yarn 7 in the present invention has strong mechanical properties and fire and moisture resistance, which can improve the overall mechanical strength and stability of the cable. In the present invention, the filling volume of the basalt fiber bulked yarn 7 accounts for 10%-60% of the inner cavity volume of the basalt fiber tape 2.

[0026] At present, similar products commonly found on the market use flame retardant tapes with a thickness of 0.15 mm. The thickness of the basalt fiber tape 2 is processed to 0.08-0.10 mm, and preferably 0.09 mm. After the thickness is thinned, the work efficiency is effectively improved and the number of times the tape is replaced is reduced; the weaving density of the basalt fiber tape 2 is optimized from about 85% to a weaving density of 100%, which can effectively improve its flame retardant performance from Class B to Class A, and at the same time can enhance the mechanical properties of laying and installation, effectively avoid the phenomenon of pulling off the conductor during the installation and laying process, and reduce the friction between the sheath layer.

[0027] The thickness of the basalt fiber tape 2 in the present invention is 0.01 mm, while conventional similar products use at least two layers of synthetic mica tape with a thickness of ≥ 0.14 mm. Compared with conventional products, the basalt fiber tape 2 used in the present invention reduces the cost of raw materials by 15%.

[0028] like Figure 1 As shown, in the present invention, the number of wire cores 1 is more than two, and adjacent wire cores 1 are tangent to each other. More than two wire cores 1 fill the inner cavity of the basalt fiber tape 2. This method can ensure the overall roundness of the cable shape and enhance the tensile strength of the cable. In a preferred embodiment of the present invention, the number of wire cores 1 is seven, one of which is set on the center line of the cable, and the remaining six are evenly distributed on the periphery of the center wire core 1, and the six outer wire cores 1 are tangent to the inner cavity wall of the basalt fiber tape 2. In this embodiment, the gap between each wire core 1 is also filled with basalt fiber bulked yarn 7.

[0029] like Figure 2 As shown, the wire core 1 includes a central layer 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 insulating layer 106 which are concentrically arranged and sequentially wrapped around the outer periphery of the central layer basalt fiber braided wire 101 from the inside to the outside.

[0030] In the present invention, basalt fiber is used as the center of the core 1 so that the overall tensile strength of the core 1 is higher. Although it is arranged at the center of the core 1, it is not used to transmit current, but is mainly used for the strength and durability of the core 1 part.

[0031] The braiding density of the central layer 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%. The basalt fiber braided layer with the above density can effectively isolate the flame and increase the longitudinal tensile strength of the cable, effectively avoiding the phenomenon of breaking the conductor during the installation and laying process, and has better fire resistance and moisture resistance.

[0032] The first conductor 102 is a stranded aluminum alloy conductor, and is an ultra-soft aluminum alloy conductor. The ultra-soft aluminum alloy conductor has excellent flexibility and will not crack even if subjected to repeated forces, reducing the potential safety hazards during installation, and making it easier for aluminum alloy cables to bend, reducing the installation layout space and reducing installation costs. Although the conductivity of aluminum alloy is not as good as copper, due to its low density, its resistivity and electrical quality per unit length are relatively superior.

[0033] The second conductor 104 is a stranded copper alloy conductor. The present invention uses a copper alloy conductor to significantly improve the mechanical strength and electrical conductivity of the entire cable, reduce resistance loss, and improve power transmission efficiency. The copper alloy conductor has better oxidation resistance than an aluminum alloy conductor. In harsh environments such as humidity or high temperature, the copper alloy conductor can effectively prevent the occurrence of oxidation reactions and maintain the stability and reliability of the cable.

[0034] In actual processing, the present invention optimizes the diameter of the aluminum alloy conductor monofilament from the conventional 0.5-0.7mm to ≤0.30mm, further improving the overall tensile strength of the aluminum alloy conductor and enhancing the overall flexibility. The diameter of the copper alloy conductor monofilament is optimized from the conventional 0.21-0.31mm to ≤0.12mm, the elongation at break is increased to ≥35%, and the monofilament resistivity is reduced to ≤0.016900Ω·mm 2 / m. The central layer basalt fiber braided wire 101 + aluminum alloy monofilament + second basalt fiber braided layer 103 + copper monofilament are twisted together to fully demonstrate the high temperature resistance of the basalt fiber when they are annealed in a tank, reducing the trouble of secondary annealing, and reducing the weight of the cable and the cost. The traditional braided layer mainly uses aramid wire, and is only added to the periphery of the central layer of the twisted conductor in the form of wire. It does not have the high braiding strength of the second basalt fiber braided layer 103 in the present invention. The second basalt fiber braided layer 103 in the present invention can play a supporting and buffering role, reducing the wear between the first conductor 102 and the second conductor 104.

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

[0036] The product of the present invention was tested for mechanical fatigue resistance according to the China Robot Industry Alliance standard CRIA0003, and the test result showed that the drag chain test times were 12 million times. The common cable drag chain test times on the market is 10 million times, and the new drag chain of the present invention has a test times of 12 million times, which greatly improves the overall mechanical properties of the cable and has strong practicality.

[0037] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of green basalt fiber mechanical resistance cable, characterized in that: The invention comprises a wire core (1), a basalt fiber tape (2), an inner protective layer (3), an aluminum foil layer (4), a first basalt fiber braided layer (5) and an outer sheath (6), wherein the basalt fiber tape (2), the inner protective layer (3), the aluminum foil layer (4) and the outer sheath (6) are arranged concentrically and sequentially wrapped around the outer periphery of the wire core (1) from the inside to the outside; and a basalt fiber bulked yarn (7) is also filled between the wire core (1) and the basalt fiber tape (2).

2. The green new basalt fiber mechanical resistance cable according to claim 1 is characterized in that: The wire core (1) comprises a central layer basalt fiber braided wire (101), and further comprises a first conductor (102), a second basalt fiber braided layer (103), a second conductor (104), a third basalt fiber braided layer (105), and an insulating layer (106) which are arranged concentrically and sequentially coated on the periphery of the central layer basalt fiber braided wire (101) from the inside to the outside.

3. The green new basalt fiber mechanical resistance cable according to claim 2 is characterized in that: The first conductor (102) is a stranded aluminum alloy conductor, and the diameter of the aluminum alloy single wire in the stranded aluminum alloy conductor is ≤0.30 mm.

4. The green new basalt fiber mechanical resistance 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 single wire in the stranded copper alloy conductor is ≤0.12 mm.

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

6. The green new basalt fiber mechanical resistance cable according to claim 4 is characterized in that: The filling volume of the basalt fiber bulked yarn (7) accounts for 10%-60% of the inner cavity volume of the basalt fiber wrapping tape (2).

7. The green new basalt fiber flame retardant cable according to claim 1, 2, 3 or 6, characterized in that: The number of wire cores (1) is more than two, and adjacent wire cores (1) are tangent to each other.

8. The green new basalt fiber flame retardant cable according to claim 4 is characterized in that: The number of wire cores (1) is more than two, and adjacent wire cores (1) are tangent to each other.

9. The green new basalt fiber flame retardant cable according to claim 5, characterized in that: The number of wire cores (1) is more than two, and adjacent wire cores (1) are tangent to each other.

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