CN224052899U - High-flame-retardant variable-frequency cable - Google Patents

Abstract

This utility model relates to the field of wires and cables, specifically to a high flame-retardant frequency converter cable, comprising multiple conductors and multiple insulation layers. The insulation layers are disposed on the outside of the conductors. A copper wire braided phase-separation shielding layer is disposed outside the insulation layers. A silicone rubber filling layer is disposed outside the copper wire braided phase-separation shielding layer. A flame-retardant wrapping layer is disposed outside the silicone rubber filling layer. A corrugated copper sheath is disposed outside the flame-retardant wrapping layer. An outer sheath layer is disposed outside the corrugated copper sheath. Through the insulation layers, silicone rubber filling layer, flame-retardant wrapping layer, corrugated copper sheath, and outer sheath layer, the flame-retardant, moisture-proof, and anti-interference properties of the cable are effectively improved. This structure is suitable for frequency converter cable applications in complex scenarios.

Description

High-flame-retardant variable-frequency cable

Technical Field

The utility model relates to the field of wires and cables, in particular to a high-flame-retardant variable-frequency cable.

Background

The variable frequency cable is mainly used for directly connecting a variable frequency power supply and a variable frequency motor, and is used for conveying electric energy in power transmission and distribution lines with rated voltage of 1000V or below, and is particularly suitable for industries such as radio communication, papermaking, metallurgy, metal processing, mines, railways, food processing and the like. For special fields of railways, radio communication and the like, the variable frequency cable is required to have higher anti-interference performance and high flame retardant performance, and the common variable frequency cable cannot meet the requirement. Therefore, a high-flame-retardant variable frequency cable is provided, and the problems are solved.

Disclosure of utility model

The utility model aims to provide a high-flame-retardant variable-frequency cable, which adopts a low-smoke halogen-free flame-retardant polyolefin insulating layer, a copper wire braided split-phase shielding layer, a silicon rubber filling layer, a flame-retardant wrapping tape layer, a corrugated copper sheath and a low-smoke halogen-free flame-retardant polyolefin sheath structure. The flame retardant property and the shielding property of the cable are improved.

In order to achieve the above purpose, the utility model provides a high-flame-retardant variable frequency cable, which comprises a plurality of conductors, and further comprises a plurality of insulating layers, wherein the insulating layers are arranged on the outer sides of the conductors, copper wire braided split-phase shielding layers are arranged on the outer sides of the insulating layers, silicon rubber filling layers are arranged on the outer sides of the copper wire braided split-phase shielding layers, flame-retardant wrapping tape layers are arranged on the outer sides of the silicon rubber filling layers, corrugated copper sheaths are arranged on the outer sides of the flame-retardant wrapping tape layers, and outer sheath layers are arranged on the outer sides of the corrugated copper sheaths.

The conductor is formed by layering and twisting a plurality of annealed metal wires.

The insulating layer is formed by extruding a low-smoke halogen-free flame-retardant polyolefin insulating material outside the conductor.

The copper wire braided split-phase shielding layer is formed by braiding copper wires, and the braiding density rho is 80% mm and less than rho.

The silicon rubber filling layer is formed by extruding and packing silicon rubber materials.

Wherein the flame-retardant tape layer consists of glass fiber tape and inorganic mineral refractory tape from inside to outside.

The thickness h ₂ of the silicon rubber filling layer is smaller than or equal to 1mm and smaller than or equal to ₂ and smaller than or equal to 2mm, and the silicon rubber filling layer is uniformly filled between the insulating layer and the flame-retardant wrapping tape layer.

Wherein the number of layers T ₁ of the glass fiber wrapping tape is less than or equal to 1 layer and less than or equal to T ₁, and the number of layers T ₂ of the inorganic mineral refractory wrapping tape is less than or equal to 2 layers and less than or equal to T ₂.

Wherein, the wrinkled copper sheath adopts inert gas to protect and welds the wrinkled copper sheath, wrinkled copper sheath thickness h ₃ satisfies 0.2mm and is less than or equal to h ₃.

Wherein the outer sheath layer is formed by extruding a low-smoke halogen-free flame-retardant polyolefin material, and the thickness h ₃ of the outer sheath layer is less than or equal to 1.4mm and less than or equal to h ₃.

Compared with the prior art, the utility model has the following advantages:

The high-flame-retardance variable-frequency cable sequentially comprises a conductor, an insulating layer, a copper wire braided split-phase shielding layer, a silicon rubber filling layer, a flame-retardance wrapping tape layer, a corrugated copper sheath and an outer sheath layer from inside to outside.

The insulating layer is made of insulating low-smoke halogen-free flame-retardant polyolefin materials, on one hand, insulation electrical performance is guaranteed, on the other hand, intrinsic flame-retardant performance of the insulating materials is improved, the copper wire braided split-phase shielding layer is arranged outside the insulating layer, anti-interference performance of a cable is improved, the silicon rubber filling layer and the flame-retardant wrapping layer are arranged outside the copper wire braided split-phase shielding layer, the silicon rubber filling layer is formed by extruding and wrapping silicon rubber, the flame-retardant wrapping layer is formed by wrapping glass fiber wrapping tape and inorganic mineral fire-resistant wrapping tape from inside to outside, the structure is made of intrinsic flame-retardant materials, the flame-retardant level of a cable core is improved, the overall flame-retardant level of the cable is improved to a higher level, the problem that the cable core is not flame-retardant or even inflammable after a flame-retardant variable-frequency cable sheath on the market fails is solved, and secondly, due to good mechanical performance of the silicon rubber, the overall flexibility of the cable is improved, the corrugated copper sheath is arranged outside the flame-retardant wrapping layer, the structure can effectively isolate flame from spreading to the cable core, flame-retardant performance of the cable is improved, the flame-retardant performance of the cable is enhanced, the flame-retardant performance of the cable is improved, the whole flame-retardant level is improved, the cable is improved, the performance, the cable is improved, the flame-resistant performance, the cable is improved, and the flame-resistant performance is improved, and the whole flame-resistant performance and the cable is improved, and the flame resistant, and the cable is improved, and the flame resistant.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a cross-sectional view of a high flame retardant performance variable frequency cable of the present utility model.

FIG. 2 is a schematic structural view of the fiberglass tape and inorganic mineral refractory tape of the present utility model.

In the figure, a 1-conductor, a 2-insulating layer, a 3-copper wire woven split-phase shielding layer, a 4-silicon rubber filling layer, a 5-flame-retardant wrapping tape layer, a 6-corrugated copper sheath, a 7-outer sheath layer, an 8-glass fiber wrapping tape and a 9-inorganic mineral fire-resistant wrapping tape are adopted.

Detailed Description

The following detailed description of embodiments of the utility model, examples of which are illustrated in the accompanying drawings and, by way of example, are intended to be illustrative, and not to be construed as limiting, of the utility model.

Referring to fig. 1 and 2, fig. 1 is a cross-sectional view of a high-flame-retardant variable frequency cable, and fig. 2 is a schematic structural view of a glass fiber tape and an inorganic mineral refractory tape.

The utility model provides a high-flame-retardant variable-frequency cable, which comprises a conductor 1, an insulating layer 2, a copper wire braided split-phase shielding layer 3, a silicon rubber filling layer 4, a flame-retardant wrapping layer 5, a corrugated copper sheath 6 and an outer sheath layer 7, wherein the performances of flame retardance, moisture resistance, interference resistance and the like of the cable are effectively improved through the structure, and the structure is suitable for application of the variable-frequency cable in complex scenes.

The embodiment of the utility model provides a high-flame-retardant variable frequency cable which sequentially comprises a conductor 1, an insulating layer 2, a copper wire woven split-phase shielding layer 3, a silicon rubber filling layer 4, a flame-retardant wrapping tape layer 5, a corrugated copper sheath 6 and an outer sheath layer 7 from inside to outside.

Wherein, the conductor 1 is formed by layering and twisting a plurality of annealed metal wires.

Preferably, the insulating layer 2 is formed by extruding a low smoke halogen-free flame retardant polyolefin insulating material outside the conductor 1.

Further, the copper wire braided split-phase shielding layer 3 is formed by braiding copper wires, and the braiding density ρ is 80% mm less than or equal to ρ.

Preferably, the thickness h ₁ of the silicone rubber filling layer 4 meets the requirement that h ₁ is less than or equal to 1mm and less than or equal to 2mm, and the cable core outer layer and the insulation stranding gaps thereof are uniformly filled, so that the flame retardance and the fire resistance of the cable core can be enhanced, and the flexibility of the cable core is enhanced.

Preferably, the fire-retardant tape layer 5 is wrapped with the glass fiber tape 8 and the inorganic mineral fire-resistant tape 9 from inside to outside. The glass fiber wrapping tape 8 plays a role of wrapping silicone rubber and binding a cable core, and meanwhile the silicone rubber is not easy to deform in the vulcanization process of the silicone rubber, and the wrapping inorganic mineral fire-resistant wrapping tape 9 is an intrinsic flame-retardant fire-resistant material, so that flame is not easy to spread to the cable core, and the flame-retardant fire-resistant performance of the cable core is enhanced. The number of layers T ₁ of the glass fiber wrapping tape 8 is less than or equal to 1 layer and less than or equal to T ₁, and the number of layers T ₂ of the inorganic mineral refractory wrapping tape 9 material is less than or equal to 2 layers and less than or equal to T ₂.

Preferably, the corrugated copper sheath 6 is an inert gas shielded welding corrugated copper sheath, the thickness h ₃ of the corrugated copper sheath 6 meets the requirement of 0.2mm & ltoreq.h ₃, the structure can effectively isolate flame from spreading to a cable core, the flame retardant and fire-resistant performance of the cable is improved, the dampproof and anti-interference performance of the cable is enhanced, and the integral operation capability of the cable under complex use conditions is enhanced.

Furthermore, the outer sheath layer 7 adopts low-smoke halogen-free flame retardant polyolefin sheath material, which is suitable for the current multi-occasion requirement of low-smoke halogen-free flame retardant property.

Compared with the prior art, the variable frequency cable provided by the utility model has the advantages that the insulation layer 2 is a low-smoke halogen-free flame-retardant polyolefin insulation layer, the insulation intrinsic flame retardant performance is increased on the premise of ensuring the electrical performance of the cable, the intrinsic flame retardant performance of the cable core is improved by adding the silicon rubber filling layer 4 to the cable core, meanwhile, the flexibility of the cable is improved well due to the good mechanical performance of a silicon rubber material, the cable can be more suitable for complex laying environment, the glass fiber wrapping belt 8 is used for enabling the extrusion and vulcanization processing performance of the silicon rubber to be better, the cable core is better fastened and fixed, the cable structure is ensured to be excellent, the inorganic mineral flame-retardant wrapping belt 9 is an intrinsic flame-retardant material, the effect of isolating flame from spreading to the cable core and enhancing the flame retardant performance of the cable is achieved, the corrugated copper sheath 6 can effectively isolate flame from spreading to the cable core and enhancing the flame retardant performance of the cable, the structure enhances the dampproof and anti-interference performance of the cable, the overall operation capability of the cable under complex laying environment is enhanced, and the outer sheath 7 is used for the situation that the low-smoke halogen-free flame-retardant cable has low-retardant requirements and low-halogen-free flame-retardant requirements.

The foregoing disclosure is only illustrative of one or more preferred embodiments of the present application, and it is not intended to limit the scope of the claims hereof, as persons of ordinary skill in the art will understand that all or part of the processes for practicing the embodiments described herein may be practiced with equivalent variations in the claims, which are within the scope of the application.

Claims (8)

1. A high flame-retardant frequency conversion cable, comprising multiple conductors, characterized in that, It also includes multiple insulating layers, which are disposed on the outside of multiple conductors. A copper wire braided phase-separating shielding layer is disposed on the outside of the insulating layer. A silicone rubber filling layer is disposed on the outside of the copper wire braided phase-separating shielding layer. A flame-retardant wrapping tape layer is disposed on the outside of the silicone rubber filling layer. A corrugated copper sheath is disposed on the outside of the flame-retardant wrapping tape layer. An outer sheath layer is disposed on the outside of the corrugated copper sheath. 2. The high flame-retardant frequency converter cable as described in claim 1, characterized in that, The insulation layer is extruded from low-smoke, halogen-free, flame-retardant polyolefin insulating material. 3. The high flame-retardant frequency converter cable as described in claim 1, characterized in that, The silicone rubber filler layer is formed by extruding silicone rubber material. 4. The high flame-retardant frequency converter cable as described in claim 1, characterized in that, The flame-retardant wrapping layer consists of glass fiber wrapping and inorganic mineral refractory wrapping from the inside out. 5. The high flame-retardant frequency converter cable as described in claim 3, characterized in that, The thickness _h2 of the silicone rubber filler layer satisfies _{1mm≤h2≤2mm} , and is uniformly filled between the insulating layer and the flame-retardant wrapping tape layer. 6. The high flame-retardant frequency converter cable as described in claim 4, characterized in that, The number of glass fiber wrapping layers _T1 satisfies 1 layer ≤ _T1 , and the number of inorganic mineral refractory wrapping layers _T2 satisfies 2 layers ≤ _T2 . 7. The high flame-retardant frequency converter cable as described in claim 1, characterized in that, The thickness _h3 of the wrinkled copper sheath satisfies _0.2mm≤h3 . 8. The high flame-retardant frequency converter cable as described in claim 1, characterized in that, The outer sheath is made of low-smoke, halogen-free, flame-retardant polyolefin material, and its thickness _h3 satisfies _1.4mm≤h3 .