CN201796646U - XLPE insulated power cables for coal mines - Google Patents

Abstract

The utility model provides a cross-linked polyethylene insulated power cable for coal mines, which consists of a cable core and a jacket, wherein the cable core comprises three strands of conductor line cores, and the conductor line core of each strand is provided with a conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer and a copper strip shielding layer in turn from inside to outside; and the jacket is wrapped outside the cable core and provided with a filling material, a non-woven fabric belt, an inner jacket, a steel wire armor and an outer jacket in turn from inside to outside. The cross-linked polyethylene insulated power cable for the coal mines has the main characteristics of good mechanical strength, safety and reliability, and is suitable to be used as a cable for a coal mine shaft.

Description

XLPE insulated power cables for coal mines

technical field

The utility model belongs to the technical field of cable manufacture, in particular to a cross-linked polyethylene insulated power cable.

Background technique

Coal mine power cables are mainly used to transmit power from the central power distribution room to substations in mining areas, mobile substations, fully mechanized mining faces and high-voltage switches. Because the cable moves very frequently, it not only has to withstand mechanical external forces such as bending, twisting, rolling, handling, dragging or coal bumping, but also has to withstand the corrosion of moisture in the mine and the combustion of flammable gas (gas) in the mine. Therefore, in the structural design and material selection of cables for coal mines, in addition to the high electrical insulation and mechanical properties of the cables, a high degree of flexibility, stretchability, impact resistance, resistance to multiple bending and It is resistant to crushing and non-flammable. It is difficult for the existing power cables for coal mines to meet the above requirements.

Utility model content

The purpose of the utility model is to provide a cross-linked polyethylene insulated power cable for coal mines with good mechanical strength, good flexibility and good impact resistance against the deficiencies of the prior art.

The utility model is realized through the following technical solutions:

XLPE insulated power cables for coal mines are composed of a cable core and a sheath, wherein: the cable core includes three conductor cores, and each conductor core is a conductor, a conductor shield, an insulation layer, and an insulation shield from the inside to the outside. layer and copper tape shielding layer; the sheath is wrapped outside the cable core, and from the inside to the outside are filler material, non-woven fabric tape, inner sheath, steel wire armor, and outer sheath.

Preferably, the conductors are twisted by circular compression, and the compression coefficient is greater than 90%.

Preferably, the insulating material is XLPE cross-linked polyethylene material.

Preferably, the metal shielding layer is wrapped with a copper tape, and the overlapping rate is greater than 5%.

Preferably, the steel wire armor is made of galvanized low-carbon steel wires and bound with reverse steel strips.

Preferably, the sheath layer is made of flame-retardant ZRH-90°C PVC material.

The utility model has the advantages of:

The main features of XLPE insulated power cables for coal mines are good mechanical strength, good flexibility, excellent impact resistance, safety and reliability, and are suitable for use as cables for coal mine shafts.

Description of drawings

Figure 1: Schematic diagram of the cross-sectional structure of the utility model

1. Conductor; 2. Conductor shielding layer; 3. Insulation layer; 4. Insulation shielding layer; 5. Copper tape shielding layer; 6. Filling material; 7. Non-woven fabric tape; 8. Inner sheath; 9. Steel wire armor 10. Outer sheath.

Detailed ways

The following are preferred embodiments of the present utility model, and the present utility model can be implemented in any mode according to the content described in the description.

Describe in detail below in conjunction with accompanying drawing:

With reference to accompanying drawing 1, the utility model cross-linked polyethylene insulated power cable structure for coal mine is as follows: it is made up of cable core and sheath, wherein: cable core includes three strands of conductor cores, and each strand of conductor cores is sequentially from inside to outside: Conductor (1), conductor shielding layer (2), insulating layer (3), insulating shielding layer (4) and copper tape shielding layer (5). Among them: the conductor (1) adopts circular compression twisting, and the compression coefficient is greater than 90%; the insulating layer (3) adopts XLPE cross-linked polyethylene material; the copper tape shielding layer (5) adopts the form of wrapping with copper tape, Overlap rate greater than 5%;

The sheath is wrapped on the outside of the cable core, and the filling material (6), the non-woven fabric tape (7), the inner sheath (8), the steel wire armor (9) and the outer sheath (10) are sequentially arranged from the inside to the outside. Among them: the steel wire armor (9) is made of galvanized low-carbon steel wire and bound with reverse steel strips; the outer sheath (10) is made of flame-retardant grade ZRH-90°C PVC material.

The above specific implementation methods are only preferred embodiments of this creation, and are not used to limit this creation. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this creation should be included in this creation. within the scope of protection.

Claims (6)

1. The cross-linked polyethylene insulated power cable for coal mines is composed of a cable core and a sheath. It is characterized in that the cable core includes three conductor cores, and each conductor core is a conductor and a conductor shielding layer from the inside to the outside. , insulation layer, insulation shielding layer and copper tape shielding layer; the sheath is wrapped outside the cable core, and from the inside to the outside are filling material, non-woven fabric tape, inner sheath, steel wire armor, and outer sheath. 2. The cross-linked polyethylene insulated power cable for coal mines according to claim 1, characterized in that the conductors are stranded in a circular compression, and the compression coefficient is greater than 90%. 3. The cross-linked polyethylene insulated power cable for coal mines according to claim 1, wherein the insulating material is XLPE cross-linked polyethylene material. 4. The cross-linked polyethylene insulated power cable for coal mines according to claim 1, wherein the metal shielding layer is covered and wrapped with copper tape, and the covering rate is greater than 5%. 5. The cross-linked polyethylene insulated power cable for coal mines according to claim 1, characterized in that the steel wire armor is made of galvanized low-carbon steel wire and bound with reversed steel strips. 6. The cross-linked polyethylene insulated power cable for coal mines according to claim 1, wherein the sheath layer is made of flame-retardant ZRH-90°C PVC material.