CN212342336U - Multilayer protection type cable - Google Patents

Abstract

The utility model discloses a multilayer protective cable, which comprises a conductor, wherein an inner insulating layer, an isolating layer, an outer insulating layer, a shielding layer and a sheath layer are sequentially arranged outside the conductor; a flame-retardant layer is arranged between the shielding layer and the sheath layer; the flame-retardant layer comprises a net rack layer arranged outside the shielding layer; a plurality of air bags are arranged between the net rack layer and the sheath layer; a connecting piece is connected between two adjacent air bags; the connecting piece is a ceramic silicon rubber piece; and the air bag is filled with inert gas. The inert gas is filled in the flame-retardant layer to play a role in preventing combustion; a ceramic shell is formed outside the grid layer to isolate heat and protect each layer of structure in the cable; in addition, the net rack layer adopts a carbon fiber net rack and is matched with ceramic silicon rubber, so that good heat insulation and flame retardant effects are formed in the cable, and the fire resistance of the cable is greatly enhanced.

Description

Multilayer protection type cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a multilayer protection type cable.

Background

With the acceleration of economic construction pace and the increase of electric power expansion and resident power consumption, household and building cables are widely applied to occasions such as electric power, communication and the like, the cables are indispensable materials for users in the power utilization process, and with the wide application of electric power, the enhancement of safety awareness of people is accompanied by the application of the cables to various working environments.

Insulating material and the sheath material that the cable used a large amount are flammable macromolecular material mostly, when using, often take place the burning because of outside conflagration, after insulating layer and fire-retardant oversheath layer are destroyed, can lead to adjacent wire core direct contact to appear the short circuit phenomenon, cause follow-up bigger calamity influence, and can cause the unable normal use of circuit behind the short circuit, cause the burnout of relevant power equipment. Based on this, how to design a multilayer protection type cable is the utility model discloses the technical problem that will solve.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide a multilayer protection type cable.

The utility model discloses a following technical means realizes solving above-mentioned technical problem:

a multilayer protective cable comprises a conductor, wherein an inner insulating layer, an isolating layer, an outer insulating layer, a shielding layer and a sheath layer are sequentially arranged outside the conductor;

a flame-retardant layer is arranged between the shielding layer and the sheath layer; the flame-retardant layer comprises a net rack layer arranged outside the shielding layer; the net rack layer is a honeycomb-shaped carbon fiber net rack; a plurality of air bags are arranged between the net rack layer and the sheath layer; the air bags are uniformly distributed along the circumferential direction of the net rack layer; a connecting piece is connected between two adjacent air bags; the connecting piece is a ceramic silicon rubber piece; and the air bag is filled with inert gas.

Preferably, in the multi-layer protective cable, the outer surface of the sheath layer protrudes outward to form a protrusion.

Preferably, in the multilayer protective cable, the inner insulating layer is a fluoroplastic ETFE insulating layer.

Preferably, the multilayer protective cable is characterized in that the isolation layer is a silane cross-linked halogen-free low-smoke flame-retardant polyolefin material layer.

Preferably, in the multilayer protection type cable, the outer insulating layer is a graphene layer.

Preferably, in the multilayer protective cable, the shielding layer is copper fiber.

Preferably, in the multilayer protective cable, the sheath layer is made of a plastic material.

The utility model has the advantages that: when the flame burns, the air bag is heated and melted, the inert gas in the air bag is released, and the inert gas is filled in the flame-retardant layer to play a role in preventing the combustion; meanwhile, when the connecting piece is burnt, a ceramic shell can be formed outside the net rack layer to isolate heat and protect each layer of structure inside the cable; in addition, the net rack layer adopts a carbon fiber net rack, is high temperature resistant and not easy to burn, and is matched with ceramic silicon rubber to form good heat insulation and flame retardant effects on the interior of the cable, so that the fire resistance of the cable is greatly enhanced.

Drawings

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

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

A multilayer protective cable comprises a conductor 1, wherein an inner insulating layer 2, an isolating layer 3, an outer insulating layer 4, a shielding layer 5 and a sheath layer 6 are sequentially arranged outside the conductor 1;

a flame-retardant layer 7 is arranged between the shielding layer 5 and the sheath layer 6; the flame-retardant layer 7 comprises a net rack layer 71 arranged outside the shielding layer 5; the net rack layer 71 is a honeycomb-shaped carbon fiber net rack; a plurality of air bags 72 are arranged between the net rack layer 71 and the sheath layer 6; the air bags 72 are uniformly distributed along the circumferential direction of the net rack layer 71; a connecting piece 73 is connected between two adjacent air bags 72; the connecting piece 73 is a ceramic silicon rubber piece; the air bag 72 is filled with inert gas;

when flame burns, the air bag 72 is heated and melted, and the inert gas in the air bag is released, and the inert gas is filled in the flame-retardant layer 7 to play a role in preventing the combustion; meanwhile, when the connecting piece 73 is burnt, a ceramic shell can be formed outside the net rack layer 71, so that heat is isolated, and each layer of structure inside the cable is protected; in addition, the net rack layer 71 adopts a carbon fiber net rack, is high temperature resistant and is not easy to burn, and is matched with ceramic silicon rubber to form good heat insulation and flame retardant effects on the interior of the cable, so that the fire resistance of the cable is greatly enhanced;

preferably, the outer surface of the sheath layer 6 protrudes outwards with a bump 61;

a plurality of convex blocks 61 are protruded on the outer surface of the sheath layer 6, the convex blocks 61 are designed to be trapezoidal, wherein the lower bottoms of the convex blocks 61 and the sheath layer 6 are integrally connected; the outer surface of the sheath layer 6 covers the convex blocks 61, and when being punctured by a puncture object, the puncture object punctures on the convex blocks 61 or punctures at gaps among the convex blocks 61; when the puncture stick 61 is punctured, the wall thickness is larger due to the convex block 61, the puncture resistance is greatly improved, and the puncture object is not easy to penetrate through; when the cable is punctured at the gap between the convex blocks 61, the convex blocks 61 are designed into a trapezoid shape, the gap between the convex blocks 61 is gradually reduced from outside to inside, and as the punctured object is punctured inwards, the adjacent convex blocks 61 are matched to clamp the punctured object, so that the punctured object is prevented from moving inwards, and the inside of the cable is protected from being damaged; in order to ensure the clamping effect, the lower bottoms of the adjacent lugs 61 are attached together;

the arrangement of the convex block 61 can improve the puncture-proof capability of the cable on one hand, and can prevent the air bag from being damaged by the sharp object to cause the leakage of inert gas on the other hand, thereby ensuring the flame-retardant capability.

Preferably, the inner insulating layer 2 is a fluoroplastic ETFE insulating layer, and has high strength and good tensile strength.

Preferably, the isolation layer 3 is a silane cross-linked halogen-free low-smoke flame-retardant polyolefin material, and the impact resistance, heat resistance, corrosion resistance, creep resistance, wear resistance, electrical insulation performance, flame resistance, thermal strength performance, environmental stress cracking resistance and bonding performance of the cross-linked polyolefin material can be greatly improved, so that the comprehensive performance of the cable is improved.

Preferably, the outer insulating layer 4 is a graphene layer, and has high strength, good thermal conductivity and aging resistance.

Preferably, the shielding layer 5 is a copper fiber; the copper fiber has the function of shielding an electric field and avoids electric field interference.

Preferably, the sheath layer 6 is a plastic material.

It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (7)

1. A multilayer protective cable comprises a conductor (1), wherein an inner insulating layer (2), an isolating layer (3), an outer insulating layer (4), a shielding layer (5) and a sheath layer (6) are sequentially arranged outside the conductor (1); the method is characterized in that:

a flame-retardant layer (7) is arranged between the shielding layer (5) and the sheath layer (6); the flame-retardant layer (7) comprises a net frame layer (71) arranged outside the shielding layer (5); the net rack layer (71) is a honeycomb-shaped carbon fiber net rack; a plurality of air bags (72) are arranged between the net rack layer (71) and the sheath layer (6); the air bags (72) are uniformly distributed along the circumferential direction of the net rack layer (71); a connecting piece (73) is connected between two adjacent air bags (72); the connecting piece (73) is a ceramic silicon rubber piece; and the air bag (72) is filled with inert gas.

2. A multi-layer protected cable according to claim 1, wherein: the outer surface of the sheath layer (6) protrudes outwards to form a convex block (61).

3. A multi-layer protected cable according to claim 1, wherein: the inner insulating layer (2) is a fluoroplastic ETFE insulating layer.

4. A multi-layer protected cable according to claim 1, wherein: the isolation layer (3) is a silane cross-linked halogen-free low-smoke flame-retardant polyolefin material layer.

5. A multi-layer protected cable according to claim 1, wherein: the outer insulating layer (4) is a graphene layer.

6. A multi-layer protected cable according to claim 1, wherein: the shielding layer (5) is copper fiber.

7. A multi-layer protected cable according to claim 1, wherein: the sheath layer (6) is made of plastic materials.

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