CN217008716U - Bending-resistant cable - Google Patents
Bending-resistant cable Download PDFInfo
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- CN217008716U CN217008716U CN202220151245.4U CN202220151245U CN217008716U CN 217008716 U CN217008716 U CN 217008716U CN 202220151245 U CN202220151245 U CN 202220151245U CN 217008716 U CN217008716 U CN 217008716U
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Abstract
The utility model discloses a bending-resistant cable which comprises a wire core, an insulating layer for coating the wire core, a shielding layer for coating the insulating layer and a sheath for coating the shielding layer, wherein the wire core comprises a central conductor, a first twisted layer and a second twisted layer, the central conductor, the first twisted layer and the second twisted layer are all formed by twisting a plurality of conductors, the twisting pitch of the first twisted layer is 10-14mm, the twisting pitch of the second twisted layer is 12-16mm, the conductors are formed by twisting bare copper wires and copper foil wires, the twisting pitch of the bare copper wires and the copper foil wires is not more than 20mm, the twisting directions of two adjacent conductors are opposite, the ratio of the twisting pitch of the first twisted layer to the diameter of the first twisted layer is 14, and the ratio of the twisting pitch of the second twisted layer to the diameter of the second twisted layer is 16. The cable disclosed by the utility model has the advantages that the torsion resistance and flexibility of the conductor are improved, the overload resistance and flame retardance of insulation are improved, and the shielding efficiency of the shielding layer and the integral torsion resistance of the cable are improved.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a bending-resistant cable.
Background
A flying car is a machine that flies in the air or travels on land and can transform from a road car to an airplane.
The flying automobile wing cable is used as a power transmission line of the whole automobile, the safety and the performance of the whole flying automobile are dominant, and the safety is particularly important. The flying automobile needs to be changed between the automobile and the airplane frequently, wings of the flying automobile need to be folded when the flying automobile is changed into the automobile, and wings of the flying automobile need to be unfolded when the flying automobile is changed into the airplane, so that cables in the wings need to be vertically twisted and bent frequently, and the existing cables used for the flying automobile wings are prone to fracture after being vertically twisted and bent frequently, so that accidents are caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bending-resistant cable, which aims to solve the technical problem that the cable of the wing of the existing hovercar is easy to break so as to cause accidents.
In order to solve the above technical problems or partially solve the above technical problems, the present invention proposes the following optimized technical solutions:
a bending-resistant cable comprises a wire core, an insulating layer covering the wire core, a shielding layer covering the insulating layer, and a sheath covering the shielding layer, wherein the insulating layer comprises an inner insulating layer and an outer insulating layer which are formed by co-extrusion, the sheath comprises an inner sheath and an outer sheath, the wire core comprises a central conductor, a first twisted layer and a second twisted layer, the central conductor, the first twisted layer and the second twisted layer are formed by twisting a plurality of conductors, the twisting pitch of the first twisted layer is 10-14mm, the twisting pitch of the second twisted layer is 12-16mm, the conductors are formed by twisting bare copper wires and bare copper foil wires, the twisting pitch of the bare copper wires and the copper foil wires is not more than 20mm, the twisting directions of two adjacent conductors are opposite, and the ratio of the twisting pitch of the first twisted layer to the diameter of the first twisted layer is 14, the ratio of the twist pitch of the second twist layer to the diameter of the second twist layer is 16.
Furthermore, the conductor also comprises a plurality of bare copper wires or a plurality of copper foil wires.
Further, the area of the cross section of the wire core is 16mm2、25mm2、35mm2Or 50mm2。
Further, the thickness of the inner insulating layer and the outer insulating layer is 0.35mm, 0.4mm or 0.45mm, the inner insulating layer is wrapped by the outer insulating layer, and the wire core is wrapped by the inner insulating layer.
Furthermore, the shielding layer includes internal shield layer and external shield layer, the external shield layer cladding the internal shield layer, the internal shield layer cladding the external insulation layer, the internal shield layer is by tinned copper wire and shellproof silk cross weaving form, the external shield layer is shielded around the package by the compound area of plastic-aluminum.
Further, the weaving pitch of the tinned copper wire and the bulletproof wire is 23mm, 43mm, 36mm or 29mm, and the weaving density is 85%.
Further, the thickness of the outer shield layer is 0.04 mm.
Further, the outer sheath covers the inner sheath, the inner sheath covers the outer shielding layer, and the thickness of the inner sheath and the thickness of the outer sheath are both 0.35mm or 0.4 mm.
Further, the inner insulating layer and the inner sheath are both made of high-temperature-resistant flame-retardant silicone rubber.
Further, the outer insulation and the outer sheath are both high strength silicone rubber.
Compared with the prior art, the utility model has the following beneficial effects:
the cable is arranged in the wing of the aerocar, the conductor is formed by twisting a bare copper wire and a copper foil wire according to the stress borne by the cable when the wing of the aerocar is twisted, the strength of the conductor is increased by adding the copper foil wire, meanwhile, the twisted pitch of the bare copper wire and the copper foil wire is not more than 20mm, and the strength of the conductor formed by the pitch is higher than that of the existing cable, so that the cable on the wing of the aerocar is not easy to break when being twisted frequently, and the technical problem that the cable breaks due to frequent bending to cause accidents of the aerocar is solved;
the strength of the cable is improved, and meanwhile, the radius of the cable is not required to be too large, the cable is not convenient to assemble into a wing of a flying automobile due to too large radius, the twisting pitch of the first twisting layer is limited to 10-14mm, and the twisting pitch of the second twisting layer is limited to 12-16mm, so that the bending radius of the cable is prevented from being increased due to too large pitch, and the stress suffered by the cable during vertical twisting due to too small pitch is prevented from being too large; the twisting directions of two adjacent conductors are opposite, so that the sum of the twisting moments of each layer is zero, and the flexibility and the roundness of the conductors are ensured; the ratio of the lay pitch of the first lay layer to the diameter of the first lay layer is 14 and the ratio of the lay pitch of the second lay layer to the diameter of the second lay layer is 16, which ensures that the cable does not cause an increase in the radius of the cable when bent, while being able to withstand sufficient stress.
Drawings
Fig. 1 is a schematic structural view of the cable of the present invention.
Fig. 2 is a schematic view of the construction of the cable of the utility model without the second lay.
The cable comprises a conductor 1, a conductor 11, a central conductor 12, a first twisted layer 13, a second twisted layer, a wire core 2, an inner insulating layer 3, an outer insulating layer 4, an inner shielding layer 5, a tinned copper wire 51, a bulletproof wire 52, an outer shielding layer 6, an inner sheath 7 and an outer sheath 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1-2, a bending-resistant cable comprises a wire core 2, an insulating layer covering the wire core 2, a shielding layer covering the insulating layer, and a sheath covering the shielding layer, wherein the insulating layer comprises an inner insulating layer 3 and an outer insulating layer 4 which are formed by co-extrusion, the sheath comprises an inner sheath 7 and an outer sheath 8, the wire core 2 comprises a central conductor 11, a first twisted layer 12 and a second twisted layer 13, the central conductor 11, the first twisted layer 12 and the second twisted layer 13 are all formed by twisting a plurality of conductors 1, the twisting pitch of the first twisted layer 12 is 10-14mm, the twisting pitch of the second twisted layer 13 is 12-16mm, the problem that the increase of the bending radius of the cable is caused by the overlarge pitch, the overlarge stress suffered by the cable when the cable is vertically twisted due to undersize is solved, the conductor 1 is formed by twisting a bare copper wire and a copper foil wire, according to the stress born by the cable when the wing of an automobile in flight, a plurality of copper foil wires are added into the conductor 1 which is mainly stressed when the wings of the aerocar are twisted, so that the strength of the conductor 1 is increased, and the conductor cannot be broken when the wings of the aerocar are twisted; the twisting pitch of the bare copper wires and the copper foil wires is not more than 20mm, so that the twisted conductor has certain strength and can bear stress generated when the wings of the aerocar twist, the twisting directions of two adjacent conductors 1 are opposite, and the sum of the twisting moments of all layers is zero, so that the flexibility and the roundness of the conductor 1 are ensured. The ratio of the lay pitch of the first lay layer 12 to the diameter of the first lay layer 12 is 14 and the ratio of the lay pitch of the second lay layer 13 to the diameter of the second lay layer 13 is 16, which ensures that the cable does not cause an increase in the radius of the cable when bent, while being able to withstand the stress of bending the cable.
In the above technical solution, the second twisted layer 13 is not necessarily present, that is, the core 2 may be provided with only the central conductor 11 and the first twisted layer 12 (see fig. 2), or may be provided with the central conductor 11, the first twisted layer 12 and the second twisted layer 13 (see fig. 1).
The conductor 1 also comprises a plurality of bare copper wires which are twisted or a plurality of copper foil wires which are twisted, when the wings of the aerocar are twisted, the stress borne by each part of the wire core 2 is different, the copper foil wires have the function of increasing the strength, the number of the copper foil wires added into the conductor is determined according to the magnitude of the borne stress, the more the copper foil wires are added into the conductor at the position with larger borne stress or the copper foil wires are all adopted to be twisted into the conductor, in particular, the conductor formed by twisting the bare copper wires and the plurality of copper foil wires or the conductor formed by twisting the plurality of copper foil wires is adopted, the less the copper foil wires are added into the conductor at the position with smaller borne stress or the conductor is twisted by adopting the bare copper wires, in particular, the conductor formed by twisting the plurality of bare copper wires or the conductor formed by twisting the bare copper wires and the less copper foil wires, and the cable twisted according to the mode can bear the stress when the wings are twisted, meanwhile, the direct current resistance of the copper foil wire is far larger than that of a bare copper wire with the same specification, so that the contradiction between the tensile resistance and the direct current resistance of the conductor can be balanced.
The area of the cross section of the wire core 2 is 16mm2、25mm2、35mm2Or 50mm2. When the cross section of the wire core 2 is 16mm2Or 25mm2When the core 2 is provided with only the central conductor 11 and the first twisted layer 12, the cross section of the core 2 is 35mm2Or 50mm2The core 2 is provided with a central conductor 11, a first twisted layer 12 and a second twisted layer 13.
The thickness of the inner insulating layer 3 and the thickness of the outer insulating layer 4 are 0.35mm, 0.4mm or 0.45mm, the inner insulating layer 3 is coated by the outer insulating layer 4, the wire core 2 is coated by the inner insulating layer 3, and the cross section is 16mm2The conductor 1 of (1) is coated with an inner insulating layer 3 and an outer insulating layer 4 having a thickness of 0.35mm and a cross section of 25mm2And 35mm2The conductor of (2) is coated with an inner insulating layer and an outer insulating layer having a thickness of 0.4mm and a cross section of 50mm2The conductor of (2) is coated with an inner insulating layer and an outer insulating layer having a thickness of 0.45mm。
The shielding layer includes internal shield layer 5 and external shield layer 6, and internal shield layer 5 is being wrapped to external shield layer 6 cladding, and external insulation layer 4 is being wrapped to internal shield layer 5, and internal shield layer 5 is being alternately woven by tinned copper wire 51 and shellproof silk 52 and is formed, and external shield layer 6 is being wrapped the shielding by the compound area of plastic-aluminum. Due to the fact that the flying wings twist back and forth, the cable braided shielding layer is subjected to harsh mechanical stress, so that the braided copper wire is broken, and electromagnetic interference shielding failure is caused. Only the tinned copper wire braided shield cannot bear excessive tensile force, and in order to avoid deformation or fracture of the braided shield layer, the bulletproof wire 52 is added into the braided shield layer as a reinforcing element so as to achieve high-strength tensile property.
The weaving pitch of the tinned copper wire 51 and the bulletproof wire 52 is 23mm, 43mm, 36mm or 29mm, the weaving density is 85%, wherein the cross section is 16mm2The inner shield layer 5 of the conductor 1 comprises 7 tinned copper wires and 1 bulletproof wire, the weaving pitch is 23mm, and the cross section is 25mm2The inner shield layer 5 of the conductor 1 comprises 10 tinned copper wires and 1 bulletproof wire, the weaving pitch is 43mm, and the cross section is 35mm2The inner shield layer 5 of the conductor 1 of (1) comprises 10 tinned copper wires and 1 bulletproof wire, the weaving pitch is 36mm, and the cross section is 50mm2The inner shield layer 5 of the conductor 1 of (1) comprises 10 tinned copper wires and 1 bulletproof wire, and the weaving pitch is 29 mm.
The thickness of the outer shield layer 6 is 0.04 mm. This outer shielding layer is used for shielding electromagnetic interference, causes electromagnetic interference when preventing the internal shield layer fracture, and the thickness of outer shielding layer sets up to 0.04mm be the minimum radius under the prerequisite of guaranteeing the shielding effect.
The outer sheath 8 covers the inner sheath 7, the inner sheath 7 covers the outer shielding layer 6, the thickness of the inner sheath 7 and the thickness of the outer sheath 8 are both 0.35mm or 0.4mm, wherein the cross section is 16mm2The inner sheath 7 and the outer sheath 8 of the conductor 1 are both 0.35mm and have a cross section of 25mm2、 35mm2、50mm2The inner and outer sheaths 7, 8 of the conductor 1 of (a) are both 0.4 mm.
The inner insulating layer and the inner sheath are both made of high-temperature-resistant flame-retardant silicone rubber, and the high-temperature-resistant flame-retardant silicone rubber comprises the following components: 45-75 wt% of methyl vinyl silicone rubber, 20-45 wt% of silicon dioxide, 10-35 wt% of nano active clay, 3-10 wt% of hydroxyl siloxane, 5-10 wt% of composite efficient flame retardant, 0.5-3 wt% of hydrogen siloxane and 0.5-2 wt% of platinum vulcanizing agent. Wherein, the polymerization degree of the silica gel produced by a meteorological method is about 40 ten thousand so as to ensure the strength of a sizing material, the gel content is not less than 50wt percent so as to ensure the insulation resistance value, hydrogen-based siloxane is used as a flame retardant, silica is used as a reinforcing filling for reinforcement, the tensile and tear strength of the mixed gel is not more than 40 parts at most, the processing performance is influenced too much, after the activity treatment of the nano active argil, the dispersion and combination performance of the hydrogen-based siloxane and the silica gel can be enhanced, the strength of the mixed gel is effectively improved, hydroxyl-based siloxane is used as a processing auxiliary agent, the organic combination effect of the silica molecules and the polymethylvinylsiloxane is realized, the water resistance is improved, the material oxygen index reaches more than 38 due to the use of the composite efficient flame retardant, the good flame retardant effect is realized, the hydrogen-based siloxane is used as a cross-linking agent for promoting the cross-linking reaction degree of the silicone rubber, the good physical performance is obtained, but the amount is not more than 3wt percent, the vulcanizing degree is influenced too much, and the chemical reactant of platinum used as the vulcanizing agent in the vulcanizing process is nontoxic and tasteless. The inner insulating layer 3 and the inner sheath 7 mainly play roles of high temperature resistance and flame retardance, and the maximum temperature resistance can reach 280 ℃.
The outer insulation and the outer sheath are both high-strength silicon rubber, and the high-strength silicon rubber comprises the following components: 25-55 wt% of methyl vinyl silicone rubber, 20-30 wt% of silicon dioxide, 20-40 wt% of porcelain powder, 1-5 wt% of zinc oxide, 1-5 wt% of ferric oxide, 0.1-1 wt% of zinc stearate, 2-8 wt% of hydroxyl siloxane, 0.5-3 wt% of hydrogen siloxane and 0.3-1.5 wt% of platinum vulcanizing agent. Wherein the polymerization degree of the silica gel produced by the polymethylvinylsiloxane by a meteorological method is about 40 ten thousand, the strength of the glue stock is ensured, the glue content is not higher than 50 parts so as to ensure the porcelain forming effect, the silicon dioxide is used as reinforcing filling for reinforcement, the tensile and tear strength of the mixed glue is enhanced, the magnetized powder adopts calcium silicate and the like, the magnetized powder is added with zinc oxide and iron oxide so as to reduce the temperature required by porcelain forming, under the combined action of the silicon dioxide and the magnetized layer, the zinc stearate and the calcium stearate are used as processing lubricants to improve the processing extrudability, the hydroxyl siloxane is used as a processing aid to organically combine silicon dioxide molecules with the polymethyl vinyl siloxane so as to improve the water resistance, the hydrogen siloxane is used as a cross-linking agent to promote the cross-linking reaction degree of the silicon rubber so as to obtain good physical properties, but the amount is not more than 3 wt%, the vulcanization degree is influenced too much, and the chemical reactant adopting platinum as the vulcanizing agent in the vulcanization process is nontoxic and tasteless. The outer insulation 4 and the outer sheath 8 not only have the soft characteristics of silicone rubber, but also have good tensile strength and wear resistance.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A bending-resistant cable comprises a wire core, an insulating layer for coating the wire core, a shielding layer for coating the insulating layer and a sheath for coating the shielding layer, wherein the insulating layer comprises an inner insulating layer and an outer insulating layer which are formed by co-extrusion, the sheath comprises an inner sheath and an outer sheath, and the bending-resistant cable is characterized in that,
the sinle silk includes central conductor, first transposition layer and second transposition layer, central conductor, first transposition layer and second transposition layer are all formed by many conductor transposition, the transposition pitch of first transposition layer is 10-14mm, the transposition pitch of second transposition layer is 12-16mm, the conductor is twisted by naked copper wire and copper foil silk and forms, the pitch of naked copper wire and copper foil silk transposition is not more than 20mm, adjacent two the transposition direction of conductor is opposite, the transposition pitch of first transposition layer with the ratio of the diameter of first transposition layer is 14, the transposition pitch of second transposition layer with the ratio of the diameter of second transposition layer is 16.
2. The bend-resistant cable of claim 1, wherein the conductor further comprises a plurality of bare copper wires stranded or a plurality of copper foil wires stranded.
3. A bend-resistant cable as claimed in claim 1, wherein the core has a cross-sectional area of 16mm2、25mm2、35mm2Or 50mm2。
4. The bend-resistant cable of claim 1, wherein the thickness of the inner and outer insulating layers is 0.35mm, 0.4mm or 0.45mm, the outer insulating layer covers the inner insulating layer, and the inner insulating layer covers the core.
5. The bending-resistant cable according to claim 1, wherein the shielding layer comprises an inner shielding layer and an outer shielding layer, the inner shielding layer is covered by the outer shielding layer, the outer insulating layer is covered by the inner shielding layer, the inner shielding layer is formed by cross weaving of tinned copper wires and bulletproof wires, and the outer shielding layer is wrapped by an aluminum-plastic composite tape for shielding.
6. A bend-resistant cable according to claim 5, characterized in that the braiding pitch of the tinned copper wires and the ballistic wires is 23mm, 43mm, 36mm or 29mm and the braiding density is 85%.
7. A bend-resistant cable according to claim 5, wherein the thickness of the outer shield layer is 0.04 mm.
8. A bend-resistant cable as claimed in claim 5, wherein the outer sheath surrounds the inner sheath, the inner sheath surrounds the outer shield, and the inner and outer sheaths are both 0.35mm or 0.4mm thick.
9. The bend-resistant cable of claim 1, wherein the inner insulating layer and the inner sheath are both high-temperature-resistant flame-retardant silicone rubber.
10. A bend-resistant cable as recited in claim 1, wherein the outer insulation and the outer jacket are high-strength silicone rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220151245.4U CN217008716U (en) | 2022-01-19 | 2022-01-19 | Bending-resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220151245.4U CN217008716U (en) | 2022-01-19 | 2022-01-19 | Bending-resistant cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217008716U true CN217008716U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220151245.4U Active CN217008716U (en) | 2022-01-19 | 2022-01-19 | Bending-resistant cable |
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| CN (1) | CN217008716U (en) |
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