CN219267370U

CN219267370U - Symmetrical shielding special cable for alternating-frequency motor

Info

Publication number: CN219267370U
Application number: CN202221781206.9U
Authority: CN
Inventors: 黄美华
Original assignee: CHONGQING KEBAO CABLE CO LTD
Current assignee: CHONGQING KEBAO CABLE CO LTD
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2023-06-27
Anticipated expiration: 2032-07-11

Abstract

The utility model discloses a symmetrical shielding special cable for an alternating-frequency motor, which relates to the field of cables, and the technical scheme of the utility model comprises a main wire core, a neutral wire core and a wire rope; the three main line cores are stranded on the periphery of the cotton rope, the three central line cores are stranded on the periphery of the three main line cores, and the central line cores are positioned at outer corner clamping seams between adjacent main line cores; the cotton rope comprises a tensile wire core and a heat dissipation wrapping, and the heat dissipation wrapping is made of graphite fiber; the outside of main sinle silk with neutral sinle silk has set gradually inner liner, outer shielding layer and sheath. The graphite fiber material can improve the heat dissipation effect, locally generate high temperature, can diffuse and transfer heat to the periphery, local temperature concentration is avoided, flame retardant effect is improved, and the anti-flaming material has very good tensile effect.

Description

Symmetrical shielding special cable for alternating-frequency motor

Technical Field

The utility model relates to a symmetrical shielding special cable for an alternating-frequency motor, and mainly relates to the field of cables.

Background

Electrophoresis for variable frequency motors used in variable frequency speed regulation technology is usually to fill filler between main line cores and center line cores, and then to squeeze a sheath, such as a variable frequency cable disclosed in publication number CN 202268204U. The cable has a tensile strength angle in actual use in the use process, and has poorer temperature rising hysteresis tensile effect due to poorer flame retardant effect when the outside is subjected to high temperature.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the special cable for the symmetrical shielding of the alternating-frequency motor, which adopts the graphite fiber material to improve the heat dissipation effect, locally has high temperature, can diffuse and transfer heat to the periphery, avoids local temperature concentration, improves the flame retardant effect and has very good tensile effect.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: a symmetrical shielding special cable for an alternating frequency motor comprises a main wire core, a central wire core and a rope;

the three main line cores are stranded on the periphery of the cotton rope, the three central line cores are stranded on the periphery of the three main line cores, and the central line cores are positioned at outer corner clamping seams between adjacent main line cores;

the cotton rope comprises a tensile wire core and a heat dissipation wrapping, and the heat dissipation wrapping is made of graphite fiber;

the outside of main sinle silk with the center sinle silk has set gradually inner liner, outer shielding layer and sheath.

The technical principle and the beneficial effects of the utility model are as follows:

this scheme adopts the structure of three central sinle silk of three main line cores, compare with ordinary power cable and have the interchange effect, but partial suppression interference, set up three central sinle silk simultaneously in the outer corner joint in the three main line core outsides, can more efficient utilization space, make whole outline round more, inner liner, outer shielding layer and sheath isotructure materials are fewer, utilize the space at three main line core middle parts to set up the cotton rope, improve the holistic intensity of cable, adopt graphite fiber material to improve its radiating effect simultaneously, the high temperature appears in the part, can transfer heat to the diffusion around, avoid local temperature to concentrate, improve flame retardant efficiency.

Preferably, the tensile wire core adopts a polyethylene fiber rope. Polyethylene fiber ropes have very good tensile strength.

Preferably, an inner shielding layer is arranged outside each central line core. The inner shielding layer is adopted, so that mutual electromagnetic interference between the wire cores can be avoided.

Preferably, the inner shielding layer is woven by copper wires. And electromagnetic radiation between the wire cores is well suppressed.

Preferably, the outer shielding layer is formed by wrapping copper strips. The outer shielding layer can avoid interference of external electromagnetic radiation to the inner wire core.

Preferably, a filler is arranged between the seams between the main wire core and the central wire core. The filling material can improve the fullness of the inside of the cable, and the service life of the outer protective layer is prevented from being shortened due to the special-shaped inner wire core.

Preferably, the filler is a polypropylene mesh tear tape. Has very good flame retardant effect and is very soft.

Preferably, the conductors of the main wire core and the central wire core are respectively formed by stranding fine copper wires. The flexibility of the conductor can be improved.

Preferably, an insulating layer is arranged outside the conductor of the main wire core. Ensuring the insulation effect between the conductors.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the description of the embodiments will be briefly described, and it is obvious that the drawings in the following description are only one of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

The cable comprises a conductor 1, an insulating layer 2, a tensile wire core 3, a heat dissipation sheath 4, a filler 5, an inner liner 6, an outer shielding layer 7 and a sheath 8.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only preferred embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

As shown in fig. 1, the embodiment of the utility model comprises a symmetrical shielding special cable for an alternating frequency motor, which comprises a main wire core, a central wire core and a wire rope.

the wire rope comprises a tensile wire core 3 and a heat dissipation sheath 4, and the heat dissipation sheath 4 is made of graphite fiber;

the outside of main sinle silk with the center sinle silk has set gradually inner liner 6, outer shielding layer 7 and sheath 8.

this scheme adopts the structure of three central sinle silk of three main line cores, compare with ordinary power cable and have the interchange effect, but partial suppression interference, set up three central sinle silk simultaneously in the outer corner joint in the three main line core outsides, can more efficient utilization space, make whole outline round more, inner liner 6, outer shielding layer 7 and structure materials such as sheath 8 are fewer, utilize the space at three main line core middle parts to set up the cotton rope, improve the holistic intensity of cable, adopt graphite fiber material to improve its radiating effect simultaneously, the high temperature appears in the part, can transfer heat to the diffusion around, avoid local temperature to concentrate, improve flame retardant efficiency.

The tensile wire core 3 adopts a polyethylene fiber rope. Polyethylene fiber ropes have very good tensile strength.

And an inner shielding layer is arranged outside each central wire core. The inner shielding layer is adopted, so that mutual electromagnetic interference between the wire cores can be avoided.

The inner shielding layer is formed by braiding copper wires. And electromagnetic radiation between the wire cores is well suppressed.

The outer shielding layer 7 is formed by wrapping copper strips. The outer shielding 7 prevents the interference of external electromagnetic radiation with the inner wire core.

And a filler 5 is arranged between the seams between the main wire cores and the central wire core. The filling degree of the inside of the cable can be improved through the filler 5, and the shortening of the service life of the outer protective layer due to the special-shaped inner wire core is avoided.

The filler 5 is a polypropylene net-shaped tearing belt. Has very good flame retardant effect and is very soft.

The conductors 1 of the main wire core and the central wire core are respectively formed by stranding fine copper wires. The flexibility of the conductor 1 can be improved.

An insulating layer 2 is arranged outside the conductor 1 of the main wire core. Ensuring the insulating effect between the conductors 1.

In the scheme, the lining layer 6 is made of polytetrafluoroethylene material, the sheath 8 is made of thermoplastic resin material, and the insulating layer 2 is made of polyvinyl chloride material.

In the scheme, the diameter of the main wire core is not less than 5mm, the diameter of the central wire core is not less than 3mm, the diameter of the tensile wire core 3 is not less than 0.5mm, the thickness of the insulating layer 2 is not less than 1.5mm, the thickness of the inner liner 6 is not less than 1mm, the thickness of the outer shielding layer 7 is not less than 1mm, and the thickness of the sheath 8 is not less than 1.5mm.

Wherein both the inner shielding layer and the outer shielding layer 7 are tin plated.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The special cable for the symmetrical shielding of the cross-frequency motor is characterized by comprising a main wire core, a central wire core and a wire rope;

2. The symmetrical shielded dedicated cable for an ac motor of claim 1, wherein: the tensile wire core adopts a polyethylene fiber rope.

3. The symmetrical shielded dedicated cable for an ac motor of claim 1, wherein: and an inner shielding layer is arranged outside each central wire core.

4. A symmetrical shielded dedicated cable for an ac motor according to claim 3, wherein: the inner shielding layer is formed by braiding copper wires.

5. The symmetrical shielded dedicated cable for an ac motor of claim 1, wherein: the outer shielding layer is formed by wrapping copper strips.

6. The symmetrical shielded dedicated cable for an ac motor of claim 1, wherein: and a filler is arranged between the gaps between the main wire cores and the central wire core.

7. The symmetrical shielded dedicated cable for an ac motor of claim 6, wherein: the filler adopts a polypropylene net-shaped tearing belt.

8. The symmetrical shielded dedicated cable for an ac motor of claim 1, wherein: the conductors of the main wire core and the central wire core are respectively formed by stranding fine copper wires.

9. The symmetrical shielded dedicated cable for an ac motor of claim 1, wherein: an insulating layer is arranged outside the conductor of the main wire core.