CN215450994U

CN215450994U - Frequency conversion cable with stable electrical performance

Info

Publication number: CN215450994U
Application number: CN202121868723.5U
Authority: CN
Inventors: 徐法安
Original assignee: Anhui Kangsheng Electric Group Co ltd
Current assignee: Anhui Kangsheng Electric Group Co ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-01-07
Anticipated expiration: 2031-08-11

Abstract

The utility model discloses a frequency conversion cable with stable electrical performance, which comprises a frequency conversion cable body, wherein three fiber cores A and three fiber cores B are uniformly and symmetrically twisted into a cable core at intervals in the frequency conversion cable body, the outer surface of the fiber core A is provided with an insulating layer A, the outer surface of the fiber core B is provided with an insulating layer B, the outer sides of the fiber core A and the fiber core B are filled with filling layers, the outer surfaces of the filling layers are provided with insulating layers C, the outer surface of the insulating layer C is provided with a fire-retardant layer A, the outer surface of the fire-retardant layer A is provided with a flame-retardant layer, the outer surface of the flame retardant layer is provided with a steel tape armoring layer, the outer surface of the steel tape armoring layer is provided with a copper tape layer, the outer surface of the copper strip layer is provided with a fireproof layer B, the outer surface of the fireproof layer B is provided with a tensile layer, and the outer surface of the tensile layer is provided with a protective layer. The utility model has good anti-interference performance, good shielding effect and better fire-resistant effect.

Description

Frequency conversion cable with stable electrical performance

Technical Field

The utility model relates to the technical field of variable frequency cables, in particular to a variable frequency cable with stable electrical performance.

Background

With the rapid development of social economy, the development of modern power electronic technology has entered the era of frequency conversion technology, and the modern frequency conversion technology is an alternating current electric transmission technology integrating high frequency, high voltage and large current. The frequency converter has the characteristics of high efficiency, energy conservation and intellectualization. The frequency conversion cable is generally used for a frequency conversion system, the structure of the frequency conversion cable comprises three main line insulated wires and three zero line insulated wires, an inner wrapping layer, a copper tape layer, an outer wrapping layer and an outer sheath layer are sequentially arranged outside the main line insulated wires and the zero line insulated wires, a 3+3 wire core structure is formed, the cable has stronger voltage impact resistance, can bear pulse voltage during high-speed frequent frequency conversion, and plays a good role in protecting a frequency conversion electric appliance.

However, the existing variable frequency cable has poor anti-interference performance, poor shielding effect and poor fire-resistant effect, and is difficult to achieve ideal fire-resistant effect, so that the conductor is directly burnt to cause circuit breaking under the condition that the variable frequency cable catches fire; therefore, the existing requirements are not met, and a frequency conversion cable with stable electrical performance is provided for the frequency conversion cable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a frequency conversion cable with stable electrical performance, and aims to solve the problems that the existing frequency conversion cable provided by the background technology is poor in anti-interference performance, poor in shielding effect and poor in fire-resistant effect, an ideal fire-proof effect is difficult to achieve, and a circuit is broken due to the fact that conductors are directly burnt under the condition that the frequency conversion cable catches fire.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a frequency conversion cable that electric property is stable, includes the frequency conversion cable body, the inside of frequency conversion cable body is twisted into the cable core by three fibre core A and the even interval symmetry of three fibre core B, fibre core A's surface is provided with insulating layer A, fibre core B's surface is provided with insulating layer B, fibre core A with the outside packing of fibre core B has the filling layer, the surface of filling layer is provided with insulating layer C, insulating layer C's surface is provided with flame retardant coating A, flame retardant coating A's surface is provided with fire-retardant layer, flame retardant coating's surface is provided with the steel band armor, the surface of steel band armor is provided with the copper tape layer, the surface of copper tape layer is provided with flame retardant coating B, flame retardant coating B's surface is provided with the tensile layer, the surface of tensile layer is provided with the protective layer.

Preferably, the filling layer consists of glass fibers.

Preferably, the flame retardant layer is internally filled with a mixture of aluminum hydroxide, magnesium hydroxide and glass fiber ropes.

Preferably, the insulating layer A, the insulating layer B and the insulating layer C are formed by wrapping ceramic silicon rubber belts.

Preferably, the tensile layer is composed of polyester fibers.

Preferably, the material of the protective layer is nitrile rubber.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the three fiber cores A and the three fiber cores B are symmetrically cabled, the symmetrical cable structure has better electromagnetic compatibility due to the interchangeability of the conducting wires, plays a certain role in inhibiting electromagnetic interference, can offset odd-order frequency in higher harmonics, improves the anti-interference performance of the special cable for the variable frequency motor, reduces electromagnetic radiation in the whole system, improves the stability, and improves the fireproof and flame-retardant performances of the variable frequency cable body by arranging a steel belt armor layer and a copper belt layer for shielding together and adopting two different shielding materials for playing a certain complementary role in electromagnetic wave shielding, so that the shielding effect is better.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a front cross-sectional view of the present invention in its entirety;

fig. 3 is a partial structural schematic diagram of the variable frequency cable body according to the utility model.

In the figure: 1. a variable frequency cable body; 2. a fiber core A; 3. a fiber core B; 4. a filling layer; 5. an insulating layer A; 6. an insulating layer B; 7. an insulating layer C; 8. a fire-proof layer A; 9. a protective layer; 10. a tensile layer; 11. a fire-proof layer B; 12. a copper tape layer; 13. a steel tape armor layer; 14. a flame retardant layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 3, an embodiment of the present invention includes: the utility model provides a frequency conversion cable that electric property is stable, including frequency conversion cable body 1, frequency conversion cable body 1's inside is twisted into the cable core by three fibre core A2 and the even interval symmetry of three fibre core B3, fibre core A2's surface is provided with insulating layer A5, fibre core B3's surface is provided with insulating layer B6, fibre core A2 and fibre core B3's outside packing has filling layer 4, filling layer 4's surface is provided with insulating layer C7, insulating layer C7's surface is provided with flame retardant coating A8, flame retardant coating A8's surface is provided with flame retardant coating 14, flame retardant coating 14's surface is provided with steel band armor 13, steel band armor 13's surface is provided with copper tape layer 12, copper tape layer 12's surface is provided with flame retardant coating B11, flame retardant coating B11's surface is provided with tensile layer 10, tensile layer 10's surface is provided with protective layer 9.

Further, the filling layer 4 is composed of glass fibers.

Furthermore, the flame-retardant layer 14 is filled with a mixture of aluminum hydroxide, magnesium hydroxide and glass fiber ropes, so that the flame-retardant effect is good.

Furthermore, the insulating layer A5, the insulating layer B6 and the insulating layer C7 are all formed by wrapping ceramic silicon rubber belts, and the insulating effect is good.

Further, the tensile layer 10 is made of polyester fiber, and has good tensile property.

Further, the protective layer 9 is made of nitrile rubber, which has excellent oil resistance, high wear resistance, good heat resistance and strong adhesion.

The working principle is as follows: during the use, through the symmetrical stranding of three fibre core A2 and three fibre core B3, symmetrical cable structure is because the interchangeability of wire, there is better electromagnetic compatibility, play certain effect to inhibiting electromagnetic interference, can offset the odd-order frequency in the higher harmonic, improve inverter motor private cable's interference immunity, electromagnetic radiation in the entire system has been reduced, stability is improved, through being provided with steel band armor 13, copper strips layer 12 shields together, two kinds of different shielding materials have been adopted, play certain complementary action on electromagnetic wave shielding, shielding effect will be better, through being provided with flame retardant coating A8, flame retardant coating 14, flame retardant coating B11, the fire prevention fire behavior of inverter cable body 1 has been improved, the utility model discloses interference immunity is good, shielding effect is good, and fire-resistant effect is better.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a frequency conversion cable that electric property is stable, includes frequency conversion cable body (1), its characterized in that: the variable frequency cable is characterized in that a cable core is formed by symmetrically twisting three fiber cores A (2) and three fiber cores B (3) into the variable frequency cable body (1) at uniform intervals, an insulating layer A (5) is arranged on the outer surface of the fiber cores A (2), an insulating layer B (6) is arranged on the outer surface of the fiber cores B (3), a filling layer (4) is filled outside the fiber cores A (2) and the fiber cores B (3), an insulating layer C (7) is arranged on the outer surface of the filling layer (4), a fireproof layer A (8) is arranged on the outer surface of the insulating layer C (7), a flame retardant layer (14) is arranged on the outer surface of the fireproof layer A (8), a steel strip armor layer (13) is arranged on the outer surface of the flame retardant layer (14), a copper strip layer (12) is arranged on the outer surface of the steel strip armor layer (13), and a fireproof layer B (11) is arranged on the outer surface of the copper strip layer (12), the surface of flame retardant coating B (11) is provided with tensile layer (10), the surface of tensile layer (10) is provided with protective layer (9).

2. An electrically stable variable frequency cable according to claim 1, wherein: the filling layer (4) is composed of glass fibers.

3. An electrically stable variable frequency cable according to claim 1, wherein: the flame-retardant layer (14) is filled with a mixture of aluminum hydroxide, magnesium hydroxide and glass fiber ropes.

4. An electrically stable variable frequency cable according to claim 1, wherein: the insulating layer A (5), the insulating layer B (6) and the insulating layer C (7) are all formed by wrapping ceramic silicon rubber belts.

5. An electrically stable variable frequency cable according to claim 1, wherein: the tensile layer (10) is composed of polyester fibers.

6. An electrically stable variable frequency cable according to claim 1, wherein: the protective layer (9) is made of nitrile rubber.