CN216817940U

CN216817940U - Anti-interference variable frequency cable

Info

Publication number: CN216817940U
Application number: CN202220619443.9U
Authority: CN
Inventors: 肖秋雷; 陈开炫; 毛右娇; 靳文铭; 张坤皓
Original assignee: Gooda Wire And Cable Group Co ltd
Current assignee: Gooda Wire And Cable Group Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-06-24
Anticipated expiration: 2032-03-22

Abstract

The utility model discloses an anti-interference variable frequency cable, which comprises a cable core and a wrapping layer wrapped outside the cable core, wherein a total shielding layer and an outer sheath layer are arranged outside the wrapping layer; and a filling layer is filled in the wrapping layer. The frequency conversion cable provided by the utility model has the advantages that the problem of poor electromagnetic shielding effect can be effectively solved by adopting the sectional shielding mode and the total shielding mode after cabling, the purpose of one cable with multiple purposes is achieved by the arranged signal conductor, and the frequency conversion cable is simple in structure, safe, reliable, stable in performance, higher in practicability and wide in application places.

Description

Anti-interference variable frequency cable

Technical Field

The utility model relates to the technical field of power cables, in particular to an anti-interference variable frequency cable.

Background

As an important supporting industry of national economy, the power cable industry is growing rapidly in demand for electric wires and cables with the continuous expansion of the scale of industries such as the chinese power industry, the data communication industry, the urban rail transit industry, the automobile industry, and the manufacturing and processing industry. Power cables, which are electric wires for transmitting and distributing electric energy, are now widely used in various fields, and are important transmission media indispensable for industrial and civil use.

Along with the high-speed development of industries such as paper making, metallurgy, metal processing, mines, railways, food processing and the like in China, the application of the variable-frequency speed control system is more and more popular, correspondingly, the demand on a connecting power line between a variable-frequency power supply and a frequency converter is continuously increased, the common power line is easy to cause insulation breakdown under a large amount of higher harmonics generated by the frequency converter, and the higher harmonics generated by the frequency converter easily cause electromagnetic influence on surrounding electrical systems. Therefore, in order to meet the use environment and increasing demand of the cable, an anti-interference frequency conversion cable needs to be developed, so as to avoid the interference of higher harmonic current generated in operation on other power supply and control loops or the interference of external electromagnetic signals.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem in the background art, and provides a frequency conversion cable which is simple in structure, safe, reliable and stable in performance.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: an anti-interference variable frequency cable comprises a cable core and a wrapping layer wrapped outside the cable core, wherein a total shielding layer and an outer sheath layer are sequentially arranged outside the wrapping layer from inside to outside, the cable core is composed of main line conductors, ground line conductors and signal conductors, the main line conductors and the ground line conductors are of circular structures and are respectively provided with three groups, the three groups of main line conductors and the three groups of ground line conductors are arranged in a regular triangle shape, an external tangent structure is formed between the three groups of main line conductors, a group of ground line conductors tangent to the outside of the main line conductors are respectively arranged at external tangent positions of two adjacent groups of main line conductors, and the signal conductors are arranged at the central positions of the external tangency of the three groups of main line conductors; and a filling layer is filled in the wrapping layer.

Furthermore, the anti-interference variable frequency cable comprises a main conductor and a conductor insulating layer extruded outside the main conductor, wherein an inner shielding layer is arranged outside the conductor insulating layer, the main conductor is an oxygen-free copper conductor with the purity of 4N, the conductor insulating layer is extruded by cross-linked polyethylene insulating materials, and the inner shielding layer is a copper mesh structure woven by annealed copper wires with the diameter of 0.4-0.5 mm.

Furthermore, the anti-interference variable frequency cable comprises an auxiliary conductor and a ground wire insulating layer extruded outside the auxiliary conductor, wherein the auxiliary conductor is an oxygen-free copper conductor with the purity of 4N, and the ground wire insulating layer is formed by extruding crosslinked polyethylene insulating materials.

Furthermore, the anti-interference variable frequency cable comprises a signal conductor and an optical fiber insulating layer extruded outside the optical fiber core, wherein the optical fiber insulating layer is formed by extruding crosslinked polyethylene insulating materials.

Further, the anti-interference variable frequency cable is characterized in that the wrapping layer is a polyester belt wrapped positively and negatively, the polyester belt is of a three-layer wrapping structure, the wrapping overlapping rate of the polyester belt is not lower than 50%, the total shielding layer is a copper mesh structure woven by annealed copper wires with the diameter of 0.4-0.5 mm, the outer sheath layer is formed by extruding halogen-free low-smoke ceramic polyolefin materials, and the filling layer is filled in a gap between the main line conductor ground wire conductor and the signal conductor by adopting asbestos powder materials.

The anti-interference variable frequency cable provided by the utility model has the advantages that the problem of poor electromagnetic shielding effect can be effectively solved by adopting the sectional shielding mode and the total shielding mode after cabling, the purpose of one cable with multiple purposes can be achieved by the arranged signal conductor, and the anti-interference variable frequency cable has the advantages of simple structure, safety, reliability, stable performance, higher practicability and wide application places.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention.

Shown in the figure: the cable comprises a main line conductor 1, a main conductor 11, a conductor insulating layer 12, an inner shielding layer 13, a ground wire conductor 2, an auxiliary conductor 21, a ground wire insulating layer 22, a signal conductor 3, an optical fiber core 31, an optical fiber insulating layer 32, a lapping layer 4, a total shielding layer 5, an outer sheath layer 6 and a filling layer 7.

Detailed Description

As shown in fig. 1, the anti-interference frequency conversion cable according to the present invention includes a cable core and a wrapping layer 4 wrapped outside the cable core, a total shielding layer 5 and an outer sheath layer 6 are sequentially disposed outside the wrapping layer 4 from inside to outside, the cable core is composed of main line conductors 1, ground line conductors 2 and signal conductors 3, the main line conductors 1 and the ground line conductors 2 are both of a circular structure and are respectively provided with three groups, the three groups of main line conductors 1 and the three groups of ground line conductors 2 are all arranged in a regular triangle shape, wherein an external tangent structure is formed between the three groups of main line conductors 1, a group of ground line conductors 2 tangent to the main line conductors 1 are respectively disposed at external tangent positions of two adjacent groups of main line conductors 1, and the signal conductors 3 are disposed at central positions tangent to the three groups of main line conductors 1; and a filling layer 7 is filled in the wrapping layer 4.

Further, the anti-interference variable frequency cable comprises a main conductor 1 and a conductor insulation layer 12 extruded outside the main conductor 11, wherein an inner shielding layer 13 is arranged outside the conductor insulation layer 12, the main conductor 11 adopts an oxygen-free copper conductor with the purity of 4N, the conductor insulation layer 12 is extruded by a cross-linked polyethylene insulation material, and the inner shielding layer 13 adopts a copper mesh structure woven by annealed copper wires with the diameter of 0.4-0.5 mm; the ground wire conductor 2 comprises an auxiliary conductor 21 and a ground wire insulating layer 22 extruded outside the auxiliary conductor 21, wherein the auxiliary conductor 21 is an oxygen-free copper conductor with the purity of 4N, and the ground wire insulating layer 22 is formed by extruding crosslinked polyethylene insulating materials; the signal conductor 3 comprises an optical fiber core 31 and an optical fiber insulating layer 32 extruded outside the optical fiber core 31, wherein the optical fiber insulating layer 32 is formed by extruding crosslinked polyethylene insulating materials.

Further, the anti-interference variable frequency cable is characterized in that the wrapping layer 4 is a polyester tape which is wrapped positively and negatively, the polyester tape is of a three-layer wrapping structure, the wrapping overlapping rate of the polyester tape is not lower than 50%, the total shielding layer 5 is of a copper mesh structure woven by annealed copper wires with the diameter of 0.4-0.5 mm, the outer sheath layer 6 is formed by extruding and wrapping halogen-free low-smoke ceramic polyolefin materials, and the filling layer 7 is filled in gaps among the main line conductor 1, the ground line conductor 2 and the signal conductor 3 by adopting asbestos powder materials.

The conductor of the anti-interference frequency conversion cable is an oxygen-free copper conductor with the purity of 4N, the insulating layer 22 is formed by extruding and wrapping a cross-linked polyethylene insulating material, the oxygen-free copper conductor is insulated by cross-linked polyethylene, the cable core is in an insulated symmetrical cabling 3+3 structure, namely a three-group main line conductor 1 and a three-group ground wire conductor 2 structure, polyester tapes are adopted outside the cable core to be wound in the positive and negative directions to form a wrapping layer 4, the inner shielding layer 13 and the total shielding layer 5 are both woven by annealed copper wires to form a copper mesh structure, the problem of poor electromagnetic shielding effect of the anti-interference frequency converter cable can be effectively solved by utilizing the two-layer copper mesh structure, finally, the outer sheath layer 6 is formed by extruding and wrapping a halogen-free low-smoke ceramic polyolefin material, and the flame retardance and fire resistance of the anti-interference frequency converter cable can be improved.

In summary, the frequency conversion cable of the present invention adopts the sectional shielding and the general shielding after cabling, so as to effectively solve the problem of poor electromagnetic shielding effect, and the signal conductor 3 can achieve the purpose of one cable with multiple purposes, and has the advantages of simple structure, safety, reliability, stable performance, high practicability and wide application places.

The protection scope of the present invention is not limited to the technical solutions disclosed in the specific embodiments, the above description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, and any minor modifications, equivalent substitutions and improvements made according to the technical solutions of the present invention should be included in the protection scope of the technical solutions of the present invention.

Claims

1. An anti-interference variable frequency cable which is characterized in that: the cable comprises a cable core and a wrapping layer (4) wrapped outside the cable core, wherein a total shielding layer (5) and an outer sheath layer (6) are sequentially arranged outside the wrapping layer (4) from inside to outside, the cable core consists of main line conductors (1), ground line conductors (2) and signal conductors (3), the main line conductors (1) and the ground line conductors (2) are of circular structures and are respectively provided with three groups, the three groups of main line conductors (1) and the three groups of ground line conductors (2) are arranged in a regular triangle shape, an outer tangent structure is formed between the three groups of main line conductors (1), a group of ground line conductors (2) tangent to the main line conductors (1) are respectively arranged at outer tangent positions of two adjacent groups of main line conductors (1), and the signal conductors (3) are arranged at outer tangent center positions of the three groups of main line conductors (1); and a filling layer (7) is filled in the wrapping layer (4).

2. The antijam variable frequency cable of claim 1, wherein: thread conductor (1) is including leading conductor (11) and crowded package conductor insulation layer (12) outside leading conductor (11) be provided with internal shield layer (13) outside conductor insulation layer (12), leading body (11) adopt the purity to be 4N's oxygen-free copper conductor, conductor insulation layer (12) adopt the crowded package of crosslinked polyethylene insulating material to form, internal shield layer (13) adopt the diameter to weave the copper mesh structure that forms for 0.4 ~ 0.5 mm's annealing copper wire.

3. The antijam variable frequency cable of claim 1, wherein: the ground wire conductor (2) comprises an auxiliary conductor (21) and a ground wire insulating layer (22) extruded outside the auxiliary conductor (21), the auxiliary conductor (21) is an oxygen-free copper conductor with the purity of 4N, and the ground wire insulating layer (22) is formed by extruding crosslinked polyethylene insulating materials.

4. The antijam variable frequency cable of claim 1 further including: the signal conductor (3) comprises an optical fiber core (31) and an optical fiber insulating layer (32) extruded outside the optical fiber core (31), wherein the optical fiber insulating layer (32) is formed by extruding and coating cross-linked polyethylene insulating materials.

5. The antijam variable frequency cable of claim 1, wherein: be positive and negative polyester area around the package around covering (4), the polyester area is the three-layer around the package structure, and it is not less than 50% around the package overlap ratio, total shielding layer (5) adopt the diameter to weave the copper wire that forms for 0.4 ~ 0.5 mm's annealing copper wire, oversheath layer (6) adopt the crowded package of no halogen low cigarette ceramic polyolefin material to form, filling layer (7) adopt asbestos powder material to fill in the clearance department between thread conductor (1), ground wire conductor (2) and signal conductor (3).