CN218100733U

CN218100733U - Portable boats and ships bank is variable frequency cable for electric system

Info

Publication number: CN218100733U
Application number: CN202222189531.2U
Authority: CN
Inventors: 朱晓春; 王稳; 陈坤; 李在军
Original assignee: Jiangsu Onite Cable Co ltd
Current assignee: Jiangsu Onite Cable Co ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-12-20
Anticipated expiration: 2032-08-19

Abstract

The utility model relates to a portable boats and ships bank is inverter cable for electric system in the cable technology field includes cable core, inner liner, total shielding layer and oversheath from the inlayer to the skin in proper order, a serial communication port, the cable core includes many central symmetric distributions and the insulation core of even transposition, and every insulation core includes the soft conductor of stranded tinned soft copper wire transposition and crowds the insulating layer of wrapping the soft conductor periphery after the transposition, and cable core after the transposition and total shielding layer are crowded package inner liner in order to fill up the inner space between the layer. The utility model discloses a cable, the frequency that can carry reaches 30-300Hz, has better withstand voltage impact, prevents electromagnetic interference and removes the performance of using, can satisfy the bank electricity power supply demand of different frequency, different distribution voltage level boats and ships.

Description

Portable boats and ships bank is variable frequency cable for electric system

Technical Field

The utility model relates to the technical field of cables, in particular to a portable for boats and ships bank frequency conversion cable for electric system for boats and ships power supply system.

Background

At present, the frequency of ship power supply systems of various countries in the world is different, the voltage is also different, in order to ensure that the power supply requirements of ships with different frequencies and ships with different distribution voltage grades are met, and simultaneously, in order to better achieve the purposes of energy conservation and emission reduction, the shore power supply frequency conversion technology gradually becomes the development trend of the shore power system. The shore power cable is used as a power transmission carrier in a frequency conversion system, and has the advantages of large transmission power, short frequency change time, strong voltage impact resistance and influence caused by higher harmonics, and capability of inhibiting electromagnetic radiation pollution caused by high-frequency electromagnetic waves to the environment and influence on peripheral equipment.

SUMMERY OF THE UTILITY MODEL

The utility model discloses it is not enough to each item that boats and ships shore connection cable exists, can not satisfy the problem that the demand was carried in the shore connection power supply, carries one kind altogether and has stronger withstand voltage impact, and anti-electromagnetic interference can remove and use in the variable frequency cable for boats and ships shore connection system.

The utility model aims at realizing like this, a portable for boats and ships bank frequency conversion cable for electric system includes cable core, inner liner, total shield layer and oversheath from the inlayer to the skin in proper order, a serial communication port, the cable core includes many central symmetric distributions and the insulation core of even transposition, and every insulation core includes the flexible conductor of stranded tinned soft copper wire transposition and crowds the insulating layer of wrapping the flexible conductor periphery after the transposition, crowded package inner liner in order to fill up the inner space between cable core after the transposition and the total shield layer.

The utility model discloses a cable that bank electricity was exclusively used in and is supplied power and carry, the cable core is through the insulation core that adopts central symmetry structure to reach homogenization electric field and each looks balance, makes the cable have stronger withstand voltage impact resistance, can stand the pulse voltage when high-speed frequent frequency conversion; the symmetrical structure has better electromagnetic compatibility due to the interchangeability of the conductors, plays a certain role in inhibiting electromagnetic interference, can offset odd-order frequency in higher harmonic waves, improves the anti-interference performance and reduces electromagnetic radiation; the total shielding layer is arranged, so that the electromagnetic radiation can be inhibited, the grounding wire can be used as a channel of short-circuit current, the grounding protection effect is realized, and the requirement of moving and using the cable can be met; the extrusion wrapping type inner liner is adopted to fill the gap of the cable core, so that the distortion of the cable core when the cable moves can be effectively prevented.

In order to meet different grounding requirements, the cable core is of a 3-core structure and comprises three main insulated wire cores which are distributed in a 120 ︒ centrosymmetric mode.

In order to further adapt to different grounding requirements, the cable core is of a 3+3 core structure and comprises three main insulated wire cores and three grounding insulated wire cores, wherein the main insulated wire cores and the grounding insulated wire cores are distributed at intervals and are symmetrically stranded in the center of 120 ︒.

In order to conveniently realize the function that the total shielding layer is used as the ground, the total shielding layer is woven by tinned copper wires.

In order to further improve the cable strength, the outer sheath comprises an inner layer and an outer layer which are extruded in sequence, and a reinforcing layer is clamped between the inner layer and the outer layer.

In order to facilitate the bending winding of the cable of the reinforced structure, the reinforced layer is woven by nylon.

The utility model discloses a be exclusively used in cable that bank electricity supplied power and carried, be equipped with the mode that two kinds of ground connection are connected, can be through the total shielding layer double as the earth connection of dedicated wiring connecting terminal connecting wire end, also can regard as the earth connection through three ground insulation sinle silks, select in a flexible way according to the connection condition of the bank electricity power supply system who uses the scene. Adopt the utility model discloses a cable of above-mentioned structure, the frequency that can carry reaches 30-300Hz, has better withstand voltage impact, prevents electromagnetic interference and removes the performance of using, can satisfy the bank electricity power supply demand of different frequency, different distribution voltage class boats and ships.

Drawings

Fig. 1 is a schematic cross-sectional view of a variable frequency cable for a movable ship shore power system according to embodiment 1 of the present invention.

Fig. 2 is a schematic cross-sectional view of a variable frequency cable for a movable ship shore power system according to embodiment 2 of the present invention.

Wherein, 1, an outer sheath; 2 a total shield layer; 3, lining layer; 4, a flexible conductor; 5 an insulating layer; 6 a reinforcing layer; 7 grounded insulated wire core.

Detailed Description

Example 1

As shown in fig. 1, the variable frequency cable for the movable ship shore power system of this embodiment sequentially includes, from an inner layer to an outer layer, a cable core, an inner liner layer 3, a total shield layer 2 and an outer sheath 1, where the cable core includes three main line insulation cores that are centrally and symmetrically distributed as 120 ︒, each main insulation core includes a soft conductor 4 formed by twisting a plurality of tinned soft copper wires and an insulation layer 5 extruded and wrapped on the periphery of the soft conductor 4, the three main insulation cores are uniformly twisted at equal pitches, the inner liner layer 3 is extruded and wrapped on the periphery of the twisted cable core, then the total shield layer 2 woven by the tinned copper wires is wrapped, and then the outer sheath 1 is extruded and wrapped on the periphery of the total shield layer 2; in order to enhance the tensile property of the whole cable, the outer sheath 1 adopts a double-layer structure of an inner layer and an outer layer, and a nylon-woven reinforcing layer is clamped between the inner layer and the outer layer so as to enhance the tensile strength of the whole cable and be suitable for being used for frequently winding and stretching mobile shore power supply.

In the cable special for shore power supply and transmission, the cable core adopts three main insulated wire cores with central symmetrical structures so as to achieve the balance of a homogenized electric field and each phase, so that the cable has stronger voltage impact resistance and can bear pulse voltage during high-speed frequent frequency conversion; the symmetrical structure has better electromagnetic compatibility due to the interchangeability of the conductors, plays a certain role in inhibiting electromagnetic interference, can offset odd-order frequency in higher harmonic waves, improves the anti-interference performance and reduces electromagnetic radiation; the total shielding layer is arranged, so that the electromagnetic radiation can be inhibited, the grounding can be connected and grounded through a special grounding terminal to serve as a channel of short-circuit current, the grounding protection effect is achieved, and the requirement of moving and using the cable can be met; the extrusion type inner liner is adopted to fill the gap of the cable core, so that the distortion of the cable core can be effectively prevented when the cable moves; the outer sheath of bilayer structure presss from both sides the enhancement layer of establishing the nylon and weaving, can further increase the holistic tensile strength of outer sheath to the sinle silk structure of better protection inlayer.

Example 2

As shown in fig. 2, in the variable frequency cable for a movable marine shore power system of this embodiment, on the basis of the main structure of embodiment 1, grounding insulated wire cores 7 are further respectively disposed between the main insulated wire cores, each grounding insulated wire core 7 is also composed of a soft conductor 4 and an ethylene propylene rubber insulating layer 5 extruded on an outer layer, and the number of the grounding insulated wire cores 7 is three, and the grounding insulated wire cores are 120 ︒ and are distributed at intervals between the main insulated wire cores. The cable structure of this embodiment further increases ground connection insulation core 7, and as ground protection, when avoiding adopting total shielding layer as the earth connection, thereby because the restriction of total shielding layer cross-section leads to the problem that can't satisfy ground current, the ground protection effect that plays that can be better more is applicable to the chooseing for use requirement of big cross-section variable frequency cable.

The utility model provides a portable boats and ships bank is inverter cable for electric system has better withstand voltage and strikes, prevents electromagnetic interference's performance, has good resistant crooked, tensile, antitorque distortion performance, and wear-resisting, resistant oily, resistant weather, fire-retardant characteristic, and operating frequency reaches 30-300Hz, can satisfy the bank electricity power supply demand of different frequency, different distribution voltage level boats and ships.

Claims

1. The utility model provides a portable for boats and ships bank frequency conversion cable for electric system, includes cable core, inner liner, total shielding layer and oversheath from the inlayer to the skin in proper order, its characterized in that, the cable core includes many central symmetric distributions and the insulation core of even transposition, and every insulation core includes the soft conductor of stranded tinned soft copper wire transposition and crowded package is at the insulating layer of the soft conductor periphery after the transposition, crowded package inner liner in order to fill up the inner space between cable core after the transposition and the total shielding layer.

2. The variable frequency cable for the movable marine shore power system of claim 1, wherein the cable core is of a 3-core structure, and comprises three main insulated wire cores of 120 ︒ which are arranged in a centrosymmetric manner.

3. The variable frequency cable for the movable marine shore power system of claim 1, wherein the cable core is of 3+3 core structure, comprising three main insulated wire cores and three ground insulated wire cores, and each main insulated wire core and each ground insulated wire core are distributed at intervals and are symmetrically stranded in the center of 120 ︒.

4. The variable frequency cable for a movable marine shore power system according to claim 2 or 3, wherein said total shielding layer is woven from tinned copper wire.

5. The movable variable frequency cable for a marine shore power system according to claim 4, wherein the outer sheath comprises an inner layer and an outer layer which are extruded one after another, and a reinforcing layer is sandwiched between the inner layer and the outer layer.

6. The movable marine shore power system conversion cable of claim 5, wherein said reinforcing layer is woven from nylon.