CN110660503A - Electromagnetic interference resistance's fire resistance hybrid cable - Google Patents

Abstract

The invention provides a flame-retardant hybrid cable for preventing electromagnetic interference, which includes a power cable, a communication cable and a protective sleeve. The power cable has the function of shielding electromagnetic interference, and is sequentially composed of a core wire, an insulating layer, a magnetic shielding layer, a polyimide layer, and an outer sheath from the inside to the outside. The communication cable has the function of anti-electromagnetic interference, and is composed of core wire, first insulating layer, conductivity shielding material, second insulating layer, magnetic permeability shielding material, polyimide layer, outer sheath from inside to outside. . The protective sleeve wraps the power cable and the communication cable. The insulating layer is a fire-resistant ceramic silicon rubber material. The hybrid cable has better anti-electromagnetic interference ability and fireproof ability, simple structure, convenient manufacture, and is suitable for popularization and use.

Description

A flame retardant hybrid cable for preventing electromagnetic interference

technical field

The invention relates to the field of wires and cables, in particular to a flame-retardant cable for preventing electromagnetic interference.

Background technique

With the development of social economy, the amount of wires and cables is increasing rapidly, and the cables are different under different working environments. Now in electrified equipment, working cables are mainly divided into power cables and communication cables. The function of the power cable in the circuit is mainly to transmit electrical energy. The power cable will form a magnetic field in the surrounding space due to the flow of current, which will interfere with the communication cable arranged in parallel with the power cable, causing the communication cable to transmit weak current signals to fail to work normally. . Ordinary cables have poor fire resistance and are easily short-circuited after being burned, making it difficult to ensure safety and smoothness under fire conditions.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides a flame-retardant hybrid cable for preventing electromagnetic interference. The flame-retardant hybrid cable for preventing electromagnetic interference includes ten power cables, nine communication cables and a protective cover. The protective sleeve wraps the ten power cables and the nine communication cables, one of the power cables is located in the center of the anti-electromagnetic interference flame-retardant hybrid cable, and the nine communication cables Arranged around the circumference of the one power cable, the remaining nine power cables are arranged around the periphery of the nine communication cables, and the center of the nine communication cables is to the center of the one power cable. The distances are the same, the distances from the center of the nine power cables to the center of the one power cable are the same, and the protective sleeve is located on the periphery of the nine power cables.

Preferably, the power cable is composed of a core wire, an insulating layer, a magnetic shielding layer, a polyimide layer and an outer sheath in order from inside to outside.

The power cable insulation layer is a fire-resistant ceramic silicon rubber layer.

The core wire of the power cable is a three-phase four-wire structure, and the magnetic fluxes generated in the three-phase lines cancel each other out to 0 when they pass through the permeability shielding material.

Preferably, the communication cable is composed of a core wire, a first insulating layer, a conductivity shielding material, a second insulating layer, a magnetic permeability shielding material, a polyimide layer, and an outer sheath in order from inside to outside.

The first insulating layer and the second insulating layer of the communication cable are fire-proof ceramic silicon rubber layers.

In the flame-retardant hybrid cable for preventing electromagnetic interference, when working, the core wire of the communication cable and the electrical conductivity shielding material are connected in series with one end of the load to form a signal loop.

The flame-retardant hybrid cable for preventing electromagnetic interference, when working, the inductive coupling amount of the core wire of the communication cable by the external magnetic field is zero.

Due to its own lubricity, the polyimide layer can be easily peeled off from the wire when a tool is used to cut the protective cover, which improves the convenience of cable installation.

Beneficial effects of the present invention:

The invention provides a flame-retardant hybrid cable for preventing electromagnetic interference. By integrating a power cable with electromagnetic interference shielding function and a communication cable with anti-electromagnetic interference ability, the signal of the power cable to the parallel wiring communication cable is reduced. Interference ensures the transmission of weak electric signals, and at the same time, due to the use of fireproof material ceramicized silicone rubber, the fireproof effect of the hybrid cable is enhanced. The invention has the advantages of simple structure and convenient manufacture, and is suitable for popularization and use.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments.

FIG. 1 is a schematic structural diagram of a flame-retardant hybrid cable for preventing electromagnetic interference provided by a preferred embodiment of the present invention.

FIG. 2 is a schematic structural diagram of the power cable 1 in FIG. 1 .

FIG. 3 is a schematic diagram of the structure of the communication cable 2 in FIG. 1

Detailed ways

The embodiments described below are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The structure diagram of the flame-retardant hybrid cable for preventing electromagnetic interference shown in FIG. 1 includes ten power cables 1, nine communication cables 2 and an outer sheath 3, and the protective sheath 3 wraps the ten power cables 1 and Of the nine communication cables 2, one of the power cables 1 is located in the center of the flame-retardant hybrid cable for preventing electromagnetic interference, the nine communication cables 2 are circumferentially arranged around the one power cable 1, and the remaining nine power cables 1 surround the The nine communication cables 2 are arranged on the periphery, the distances from the centers of the nine communication cables 2 to the center of the one power cable 1 are the same, and the distances from the centers of the nine power cables 1 to the center of the one power cable 1 are the same, the The protective sheath 3 is located on the periphery of the nine power cables 1 .

In the structural diagram of the power cable 1 shown in FIG. 2 , the core wire 11 , the ceramic silicon rubber insulating layer 12 , the magnetic shielding layer 13 , the polyimide layer 14 and the outer sheath 15 are sequentially arranged from inside to outside. The core wire 11 is a three-phase four-wire structure, a, b, and c are three-phase core wires, respectively, and the conductor core wires are all covered by the magnetic shielding layer. The magnetic fluxes cancel each other out to 0, and there is no magnetic flux outside the cable, which has a magnetic shielding effect.

In the structural diagram of the communication cable 2 shown in FIG. 3 , from the inside to the outside are the core wire 21 , the first insulating layer ceramized silicone rubber layer 22 , the conductivity shielding material layer 23 , and the second insulating layer The ceramized silicone rubber layer 24. Magnetic permeability shielding material layer 25, polyimide layer 26, outer sheath 27. The core wire 21 is connected in series with the conductivity shielding material 23 to form a signal loop, and the permeability shielding material 25 is wrapped around the signal loop to form a low-frequency magnetic shunt, which greatly reduces the magnetic coupling interference of the external interference magnetic field to the signal cable.

The flame-retardant hybrid cable for preventing electromagnetic interference provided by this embodiment, by integrating the power cable 1 with electromagnetic interference shielding function and the communication cable 2 with anti-electromagnetic interference ability, the power cable 1 reduces the number of communication cables wired in parallel 2 signal interference, which ensures the transmission of weak current signals, and at the same time, the use of ceramicized silicone rubber, a fireproof material, enhances the fireproof effect of the hybrid cable. The invention has the advantages of simple structure and convenient manufacture, and is suitable for popularization and use.

The above disclosure is only a preferred embodiment of the present invention, and of course, it cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope of the present invention.

Claims (7)

1. The utility model provides an electromagnetic interference resistance's fire resistance hybrid cable, a serial communication port, this electromagnetic interference resistance's fire resistance hybrid cable includes ten power cable, nine communication cable and a protective sheath, this ten power cable of this protective sheath parcel and this nine communication cable, one of them power cable is located this electromagnetic interference resistance's fire resistance hybrid cable center, these nine communication cable arranges around this a power cable circumference, all the other nine power cable arrange around this nine communication cable's periphery, the distance from this a power cable centre of a circle is unanimous to this nine communication cable centre of a circle in the centre of a circle, the distance from this a power cable centre of a circle is unanimous in this nine power cable centre of a circle in the centre of a circle, this protective sheath is located this nine power cable's periphery.

2. The flame-retardant electromagnetic interference prevention hybrid cable according to claim 1, wherein: the power cable sequentially comprises a core wire, an insulating layer, a magnetic shielding layer, a polyimide layer and an outer sheath from inside to outside.

3. The flame retardant hybrid cable for preventing emi according to claim 2, wherein the insulating layer of the power cable is a fire-proof ceramic silicone rubber layer.

4. The flame-retardant hybrid cable for preventing EMI according to claim 2, wherein the core wire of the power cable is a three-phase four-wire structure.

5. The flame-retardant electromagnetic interference prevention hybrid cable according to claim 1, wherein: the communication cable sequentially comprises a core wire, a first insulating layer, a conductivity shielding material layer, a second insulating layer, a conductivity shielding material layer, a polyimide layer and an outer sheath from inside to outside.

6. The flame retardant electromagnetic interference (EMI) resistant hybrid cable according to claim 5, wherein the first and second insulating layers of the communication cable are fire-resistant ceramic silicone rubber layers.

7. The flame-retardant electromagnetic interference prevention hybrid cable according to claim 5, wherein: and one end of the communication cable core wire and one end of the conductive shielding material layer are connected with a load in series to form a signal loop.

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