CN217506938U - Frequency conversion cable - Google Patents
Frequency conversion cable Download PDFInfo
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- CN217506938U CN217506938U CN202221210379.5U CN202221210379U CN217506938U CN 217506938 U CN217506938 U CN 217506938U CN 202221210379 U CN202221210379 U CN 202221210379U CN 217506938 U CN217506938 U CN 217506938U
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Abstract
The utility model relates to the technical field of cables, and discloses a variable frequency cable, which comprises a cable core, a fireproof layer, a total shielding layer, a fireproof layer, an armor layer and an outer protective layer which are arranged in sequence from inside to outside; the cable core comprises three first wire cores and one second wire core; the second wire core comprises three control wire cores, isolating sleeves and a first sub-shielding layer, wherein the three control wire cores are sequentially arranged from inside to outside; each control wire core comprises a control wire core conductor, a mica tape fire-resistant layer, an insulating layer and a second sub-shielding layer, wherein the control wire core conductor, the mica tape fire-resistant layer, the insulating layer and the second sub-shielding layer are sequentially arranged from inside to outside; the outer layer of the control core conductor is provided with three layers of shields, so that the cross influence of an electric field inside a cable core, the interference of electromagnetic wave signals and the interference of external electromagnetic waves can be effectively shielded, and the anti-interference performance of the cable is greatly improved.
Description
Technical Field
The utility model relates to the technical field of cables, especially, relate to a variable frequency cable.
Background
In China, no uniform standard exists for design and manufacture of the variable frequency cable for a long time, and various manufacturers design enterprise standards or enterprise specifications aiming at the variable frequency cable according to GB/T12706 and manufacture the variable frequency cable according to the enterprise standards or the enterprise specifications, so that the manufactured variable frequency cables are various in types and the quality of finished products is uneven.
The variable frequency cable is mainly used for cables for connecting a variable frequency power supply and a variable frequency motor and for transmitting electric energy in a power transmission and distribution line with rated voltage of 1kV or below. The method is particularly widely applied to industries such as papermaking, metallurgy, metal processing, mines, railways, food processing and the like. When signals or electric power are transmitted, the signals or electric power transmitted by the cable are easily affected due to interference of external electromagnetic waves or signals, so that the electric power is weakened, the signals are degenerated and the like. Therefore, the common performance is that the power output is unstable, the signal fluctuates and the like, so that the variable frequency motor cannot normally and continuously work, and along with the issuance and implementation of the civil building electrical design standard GB 51348 and 2019, the cable and optical cable combustion performance grading GB 31247 and 2014 standard starts to be comprehensively adopted and the safety consciousness of people is enhanced, the anti-interference performance, the safety performance and the fire resistance of the cable are emphasized by more and more people, and therefore, the development of the variable frequency cable which is strong in anti-interference capability, fire-proof and fire-resistant is urgent.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a variable frequency cable, it has good anti-interference, fire prevention, fire resistance.
In order to achieve the purpose, the utility model provides a frequency conversion cable, which comprises a cable core, a fireproof layer, a total shielding layer, a fireproof layer, an armor layer and an outer protective layer which are arranged in sequence from inside to outside; the cable core comprises three first wire cores and one second wire core;
the second wire core comprises three control wire cores, isolating sleeves and a first sub-shielding layer, wherein the three control wire cores are sequentially arranged from inside to outside; each control wire core comprises a control wire core conductor, a mica tape fire-resistant layer, an insulating layer and a second sub-shielding layer, wherein the control wire core conductor, the mica tape fire-resistant layer, the insulating layer and the second sub-shielding layer are sequentially arranged from inside to outside.
Preferably, the diameters of the three first wire cores and the diameter of the one second wire core are equal, and the three first wire cores and the one second wire core are arranged in a tangent mode.
Preferably, filling cores are arranged between three first wire cores and one second wire core and between the cable core and the fire-proof layer;
the filling cores are arranged among the three control wire cores and between the control wire cores and the isolation sleeve.
Preferably, the filler core is a flame retardant PP rope.
Preferably, each first core comprises a power core conductor, a mica tape fire-resistant layer wrapping the outer surface of the power core conductor, an insulating layer and a second shielding layer which are sequentially arranged from inside to outside.
Preferably, the isolation sleeve is made of flame-retardant PVC insulating material;
the first sub shielding layer and the second sub shielding layer are woven by copper wires;
the insulating layer is a crosslinked polyethylene insulating layer.
Preferably, the fireproof layer is formed by lapping and wrapping a ceramic silicon rubber belt; the total shielding layer is formed by lapping a copper strip or sparsely winding the copper strip and reversely binding and weaving the copper strip; the fire-resistant layer is extruded by a ceramic polyolefin material; the armor layer is formed by wrapping double-layer galvanized steel strips in a clearance manner; the outer protective layer is formed by extruding halogen-free low-smoke flame-retardant polyolefin sheath materials.
Preferably, the thickness of the double-layer galvanized steel strip is 0.2-0.8 mm, and the gap between the double-layer galvanized steel strips does not exceed the thickness of the galvanized steel strip.
Preferably, the control wire core conductor and the power wire core conductor are conductors of 5 th or 6 th type.
The utility model provides a variable frequency cable, compared with the prior art, its beneficial effect lies in:
firstly, the outer layer of each control wire core conductor is provided with a second sub-shielding layer which can effectively reduce the cross influence among the control wire core conductors and the interference of electromagnetic wave signals; simultaneously, first branch shielding layer wraps up three control core, can not only improve the structural performance of cable, forms double-deck shielding outside control core moreover, and double-deck shielding can further reduce the signal interference between control core and the first core for the cable has good interference killing feature, low radiation ability and the strong advantage of electromagnetic compatibility, avoids causing the influence to the transmission of cable electric power, the transmission of signal. Furthermore, the outer layer of the control core conductor is also provided with a total shielding layer, and the three layers of shielding are formed by the first sub-shielding layer, the second sub-shielding layer and the total shielding layer, so that the interference of external electromagnetic waves can be effectively shielded, and the anti-interference performance of the cable is greatly improved.
In addition, the cable core is externally provided with a fireproof layer, a total shielding layer, a fireproof layer, an armor layer and an outer protective layer, has excellent flame-retardant, fireproof and anti-interference effects, is suitable for complex places with special requirements on fire prevention, fire resistance, flame retardance and softness, and is an anti-interference flame-retardant B1-grade fire-resistant flexible variable frequency cable.
Drawings
Fig. 1 is the utility model discloses the overall structure sketch map of frequency conversion cable that the embodiment provided.
In the figure: 100. a variable frequency cable;
11. a first wire core; 111. a power core conductor; 12. a second wire core; 121. a control wire core; 1211. a control wire core conductor; 13. a mica tape refractory layer; 14. an insulating layer; 15. a first sub-shield layer; 16. an isolation sleeve; 17. a second partial shielding layer;
2. filling the core; 3. a fire barrier layer; 4. a total shielding layer; 5. a refractory layer; 6. an armor layer; 7. an outer jacket.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It is to be understood that in the description of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e. the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. Further, unless otherwise specified, "a plurality" means two or more.
As shown in fig. 1, an embodiment of the present invention provides a variable frequency cable 100, which includes a cable core, a fire-proof layer 3, a total shielding layer 4, a fire-proof layer 5, an armor layer 6, and an outer protective layer 7, which are sequentially arranged from inside to outside, wherein the cable core includes three first cable cores 11 and one second cable core 12; the second wire core 12 comprises three control wire cores 121, isolating sleeves 16 and a first sub-shielding layer 15, wherein the three control wire cores 121 are sequentially arranged from inside to outside, and the isolating sleeves 16 and the first sub-shielding layer 15 are wrapped on the outer surfaces of the three control wire cores 121; each control wire core 121 comprises a control wire core conductor 1211, a mica tape fire-resistant layer 13 wrapping the outer surface of the control wire core conductor 1211, an insulating layer 14 and a second sub-shielding layer 17 which are sequentially arranged from inside to outside.
Based on the above structure, the outer layer of the control wire core conductor 1211 is provided with the first sub-shielding layer 15 and the second sub-shielding layer 17, preferably, the first sub-shielding layer 15 and the second sub-shielding layer 17 are both woven by copper wires, and the weaving density is not less than 80%; the double-layer shielding design can not only improve the structural performance of the cable, so that the cable has the advantages of good anti-interference capability, low radiation capability and strong electromagnetic compatibility, but also can effectively reduce the cross influence of an electric field in a cable core and the interference of electromagnetic wave signals, and avoid the influence on the transmission of the electric power of the cable and the transmission of the signals.
Meanwhile, the outer layer of the control core conductor 1211 is further provided with a total shielding layer 4, and the first sub-shielding layer 15, the second sub-shielding layer 17 and the total shielding layer 4 form three-layer shielding, so that the interference of external electromagnetic waves can be effectively shielded, and the anti-interference performance of the cable is greatly improved.
Preferably, the diameters of the three first wire cores 11 and the diameter of the one second wire core 12 are equal, and the three first wire cores 11 and the one second wire core 12 are arranged in a tangent manner, a diamond-shaped filling area with an arc edge is formed between the three first wire cores 11 and the one second wire core 12, and four special-shaped filling areas are formed between the cable core and the fireproof layer 3; three form arc limit triangle filling area between the control sinle silk 121, form three heterotypic filling area between control sinle silk 121 and the spacer sleeve 16, set up filling core 2 in each filling area, make the cable core form a whole body through setting up filling core 2, effectively improve cable core's roundness, each filling position density is even, tight, reducible air content in the cable core under the flame combustion condition from this, reduces corresponding combustion temperature. Further preferably, the filling core 2 is a flame retardant PP rope, which plays a flame retardant role, so that the safety performance of the cable can be further improved. It should be noted that if the roundness of the cable core is poor, no-standard product can be caused when the connector is selected, construction difficulty is brought to customers, construction cost is additionally increased, product competitiveness is insufficient, and even a product disqualification phenomenon can occur.
In this embodiment, the cable core includes three first cores 11 and one second core 12, where the first core 11 includes a power core conductor 111, a mica tape fire-resistant layer 13 wrapped on an outer surface of the power core conductor 111, an insulating layer 14, and a first sub-shielding layer 15, which are sequentially disposed from inside to outside; the second wire core 12 comprises three control wire cores 121, each control wire core 121 comprises a control wire core conductor 1211, a mica tape fire-resistant layer 13, an insulating layer 14 and a second sub-shielding layer 17, wherein the control wire core conductors 1211 are sequentially arranged from inside to outside, the mica tape fire-resistant layer 13, the insulating layer 14 and the second sub-shielding layer 17 are wrapped outside the control wire core conductors 1211, meanwhile, the three control wire cores 121 are tangent to each other in a pairwise mode, and the three control wire cores 121 are wrapped into a round whole through the isolating sleeve 16 and the first sub-shielding layer 15. Preferably, the isolation sleeve 16 is made of flame-retardant PVC insulation material, and the thickness of the isolation sleeve is 0.5 mm-1.0 mm.
Preferably, the power core conductor 111 and the control core conductor 1211 are both type 5 or type 6 conductors, and the type 5 and type 6 conductors are both flexible conductors, so that the flexibility of the cable can be greatly increased, the bending radius of the cable can be reduced, the adaptability of the cable in a complex terrain can be greatly improved, and the cable is convenient to lay and install.
All parcel has mica tape flame retardant coating 13 outside power core conductor 111, the control core conductor 1211, and mica tape flame retardant coating 13 adopts the coiling of two-sided synthetic mica tape to form, and mica tape flame retardant coating 13 lets the cable possess fire resistance, the utility model discloses the two-sided synthetic mica tape that uses in has unique elongation, and difficult fracture is difficult for the layering, and high temperature resistant grade is high, utilizes high performance temperature resistant glue to be the binder, and this binder burning back can form the slim crust of one deck, temperature resistant more than 1000 degrees on the mica tape surface. Preferably, the insulating layer 14 is arranged outside the mica tape fire-resistant layer 13, the insulating layer 14 is a cross-linked polyethylene insulating layer, and the linear molecular structure of polyethylene is converted into a three-dimensional reticular molecular structure through cross-linking special treatment, so that the electrical property, the physical property, the mechanical property and the chemical laying resistance of the cable are greatly improved.
In this embodiment, the cable core is sequentially provided with a fireproof layer 3, a total shielding layer 4, a fireproof layer 5, an armor layer 6 and an outer protective layer 7; preferably, the fireproof layer 3 is formed by wrapping ceramic silicon rubber belts, the fireproof layer can be wrapped in a thickness of 0.2-0.4 mm according to the size of the cabling cable core, and a compact ceramic hard layer can be formed after the ceramic silicon rubber belts are ablated, so that flame spread can be effectively prevented; the total shielding layer 4 is formed by lapping or sparsely lapping and reversely binding a copper strip, specifically, when the sparsely lapped copper strip of the copper strip is adopted for reversely binding and shielding, the gap between the copper strips is not more than 4mm, the gap between the copper strips is lapped and reversely bound, and the gap rate is set to be not more than 50% of the width of the copper strips; the flame-retardant layer 5 is extruded by ceramic halogen-free flame-retardant polyolefin oxygen-barrier material, the oxygen index is more than or equal to 45 percent, a small amount of smoke is produced after combustion, the flame-retardant polyolefin oxygen-barrier layer is non-toxic and meets the characteristic of environmental protection, and a compact ceramic hard layer is formed after ablation, so that the flame can be effectively prevented from spreading, and the cable is ensured to have good flame-retardant effect; the armor layer 6 is formed by double-layer galvanized steel strips through gap lapping, the thickness of the armor layer is 0.2 mm-0.8 mm, the flexibility of the cable can be better due to the gap lapping, and meanwhile, the arrangement of the armor layer ensures the vibration resistance, creep resistance, tensile resistance, pressure resistance and biological resistance of the cable; outer jacket 7 is extruded by the fire-retardant polyolefin sheath material of steamed low cigarette to form, and the fire-retardant polyolefin sheath material of steamed low cigarette has fire behaviour fine, no halogen and the nontoxic advantage of low cigarette to make the cable when meeting fire burning, outer jacket 7 guarantees that the cable does not drip, guarantees the integrality of cable after the burning.
To sum up, the embodiment of the utility model provides a frequency conversion cable 100 has good fire-retardant, fire-resistant, anti-interference effect, is applicable to the complicated place that has special requirement to fire prevention, fire-resistant, fire-retardant, compliance, is the fire-resistant flexible frequency conversion cable of the fire-retardant B1 level of anti-interference type.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (9)
1. A variable frequency cable, comprising: the cable comprises a cable core, a fireproof layer, a total shielding layer, a fireproof layer, an armor layer and an outer protective layer which are arranged from inside to outside in sequence; the cable core comprises three first wire cores and one second wire core;
the second wire core comprises three control wire cores, isolating sleeves and a first sub-shielding layer, wherein the three control wire cores are sequentially arranged from inside to outside; each control wire core comprises a control wire core conductor, a mica tape fire-resistant layer, an insulating layer and a second shielding layer, wherein the control wire core conductor, the mica tape fire-resistant layer, the insulating layer and the second shielding layer are sequentially arranged from inside to outside.
2. The variable frequency cable according to claim 1, wherein: the diameters of the three first wire cores and the diameter of the one second wire core are equal, and every two first wire cores and every two second wire cores are arranged in a tangent mode.
3. The variable frequency cable according to claim 1 or 2, wherein: filling cores are arranged between the three first wire cores and one second wire core and between the cable core and the fireproof layer;
the filling cores are arranged among the three control wire cores and between the control wire cores and the isolation sleeve.
4. The variable frequency cable according to claim 3, wherein: the filling core is a flame-retardant PP rope.
5. The variable frequency cable according to claim 1, wherein: each first line core includes power core conductor, parcel that from inside to outside sets gradually the power core conductor surface the mica tape flame retardant coating, insulating layer, the second branch shielding layer.
6. The variable frequency cable according to claim 1, wherein: the isolation sleeve is made of flame-retardant PVC insulating material;
the first sub shielding layer and the second sub shielding layer are woven by copper wires;
the insulating layer is a crosslinked polyethylene insulating layer.
7. The variable frequency cable according to claim 1, wherein: the fireproof layer is formed by lapping and wrapping ceramic silicon rubber belts in an overlapping manner; the total shielding layer is formed by lapping a copper strip or sparsely winding the copper strip and reversely binding and weaving the copper strip; the fire-resistant layer is extruded by a ceramic polyolefin material; the armor layer is formed by wrapping double-layer galvanized steel strips in a clearance manner; the outer protective layer is formed by extruding halogen-free low-smoke flame-retardant polyolefin sheath materials.
8. The variable frequency cable according to claim 7, wherein: the thickness of the double-layer galvanized steel strip is 0.2-0.8 mm, and the gap between the double-layer galvanized steel strips is not more than the thickness of the galvanized steel strip.
9. The variable frequency cable according to claim 5, wherein: the control wire core conductor and the power wire core conductor are 5 th or 6 th conductors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221210379.5U CN217506938U (en) | 2022-05-19 | 2022-05-19 | Frequency conversion cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221210379.5U CN217506938U (en) | 2022-05-19 | 2022-05-19 | Frequency conversion cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217506938U true CN217506938U (en) | 2022-09-27 |
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ID=83353768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221210379.5U Active CN217506938U (en) | 2022-05-19 | 2022-05-19 | Frequency conversion cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217506938U (en) |
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2022
- 2022-05-19 CN CN202221210379.5U patent/CN217506938U/en active Active
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