CN210467419U - 20P double-layer sheath monitoring communication cable - Google Patents

Abstract

The utility model provides a 20P double-deck sheath monitoring communication cable, includes a plurality of pair twist units, has the PET area in the outside cladding of a plurality of pair twist units, is equipped with the inner sheath in the outside in PET area, and the outside of inner sheath is equipped with metallic shield, is equipped with waterproof armor in metallic shield's outside, is equipped with double-deck oversheath in waterproof armor's outside, double-deck oversheath includes the fire-retardant restrictive coating of inboard low smoke and zero halogen and the semiconduction restrictive coating in the outside. The utility model provides a 20P double-deck sheath monitoring communication cable adopts double-deck material sheath, satisfies the user to the requirement of monitoring communication cable use in the building.

Description

20P double-layer sheath monitoring communication cable

Technical Field

The utility model relates to the technical field of cables, especially a 20P double-deck sheath monitoring communication cable.

Background

The monitoring communication cable is one of special products, is laid in parallel with a high-voltage power cable, and is used for longitudinal differential protection, transmission of various signals of electric appliances, instruments and the like in a power distribution device, telephone communication, carrier communication, high-frequency signal protection and the like; the power supply system is suitable for occasions such as a high-voltage transmission and transformation line system, power supplied by an urban power supply station, a power plant close to the power supply station and the like. The monitoring communication cable is generally laid outdoors, has no requirement on the low-voltage halogen-free flame retardant property of the cable, adopts graphite coating to realize the semi-conductive property of the sheath, but cannot meet the requirement of a user on the laying use of the cable in a building.

Disclosure of Invention

The utility model aims to solve the technical problem that a 20P double-deck sheath monitoring communication cable is provided, adopt double-deck material sheath, satisfy the user to the requirement of keeping watch on communication cable and using in the building.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a 20P double-deck sheath monitoring communication cable, includes a plurality of pair twist units, has the PET area in the outside cladding of a plurality of pair twist units, is equipped with the inner sheath in the outside in PET area, and the outside of inner sheath is equipped with metallic shield, is equipped with waterproof armor in metallic shield's outside, is equipped with double-deck oversheath in waterproof armor's outside, double-deck oversheath includes the fire-retardant restrictive coating of inboard low smoke and zero halogen and the semiconduction restrictive coating in the outside.

Preferably, the pair twist units comprise conductors and XLPE insulation outside the conductors, and filling paste is filled among the plurality of pair twist units.

Preferably, the inner sheath is an MDPE inner sheath, the metal shielding layer comprises a copper strip and a lead sheath, the copper strip is wrapped outside the MDPE inner sheath, and the lead sheath is arranged outside the copper strip.

Preferably, the waterproof armor layer comprises an aluminum wire armor layer and an asphalt waterproof layer, the asphalt waterproof layer is arranged outside the metal shielding layer, and the aluminum wire armor layer is arranged outside the asphalt waterproof layer.

Preferably, a non-woven fabric is arranged between the waterproof armor layer and the double-layer outer sheath.

Preferably, the low-smoke halogen-free flame-retardant sheath layer is made of polyolefin materials, and the semiconductive sheath layer is made of polyolefin materials.

Preferably, the number of the pair twisting units is 20.

The utility model provides a 20P double-deck sheath monitoring communication cable has following beneficial effect:

1. the outer sheath is made of special low-smoke halogen-free flame retardant, and meets the requirements of users on minimum tensile strength, elongation at break and termite resistance after the sheath is aged.

2. The outer sheath is made of special low-smoke halogen-free flame retardant, so that the low-smoke halogen-free flame retardant performance of the cable is improved, and the requirements of class C bundled combustion and smoke density tests of GB/T18380.35 and GB/T17651 are met.

3. The semi-conductive layer outer sheath is adopted to replace a graphite layer, so that the cable is convenient to produce and manufacture, environment-friendly and convenient to construct.

4. The outer sheath adopts double layers and can adopt a co-extrusion process, so that the problem of bonding of the double layers of the outer sheath is solved, and the production efficiency is improved.

Drawings

The invention will be further explained with reference to the following figures and examples:

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

Detailed Description

As shown in fig. 1, a 20P double-layer sheath monitoring communication cable comprises a plurality of twisted units, a PET tape 4 is wrapped outside the twisted units, an inner sheath is arranged outside the PET tape 4, a metal shielding layer is arranged outside the inner sheath, a waterproof armor layer is arranged outside the metal shielding layer, a double-layer outer sheath is arranged outside the waterproof armor layer, and the double-layer outer sheath comprises an inner low-smoke halogen-free flame-retardant sheath layer 11 and an outer semiconductive sheath layer 12.

Preferably, the pair twist units comprise a conductor 1 and XLPE insulation 2 outside the conductor 1, and filling paste 3 is filled among the plurality of pair twist units. The conductor 1 realizes the transmission of electric energy and signals, the XLPE insulation 2 ensures the safety of electric energy and signal transmission, and the filling ointment 3 with higher dropping point suitable for the XLPE insulation 2 is adopted, so that the requirements of mechanical performance test and compatibility test before and after the XLPE insulation 2 is aged are met.

Preferably, the inner sheath has guaranteed for MDPE inner sheath 5 that copper strips 6 can not harm XLPE is insulating 2, has improved the security of cable, the metal shield layer includes copper strips 6 and lead sheath 7, and copper strips 6 is around wrapping outside MDPE inner sheath 5, and copper strips 6's outside is located to lead sheath 7, and copper strips 6 and lead sheath 7 once only have realized the electrostatic shield and the magnetostatic shielding of cable, shield the electromagnetic field on every side effectively, ensure signal steady transmission.

Preferably, the waterproof armor layer comprises an aluminum wire armor layer 9 and an asphalt waterproof layer 8, the asphalt waterproof layer 8 is arranged outside the metal shielding layer, moisture can be effectively prevented from entering the metal shielding layer, and the waterproof performance of the cable is improved; the aluminum wire armor layer 9 is arranged outside the asphalt waterproof layer, can bear large mechanical external force and can effectively protect the internal structures of the lead sleeve and the cable core from being damaged.

Preferably, a non-woven fabric 10 is arranged between the waterproof armor layer and the double-layer outer sheath, so that the aluminum wire armor layer 9 is tightly and circularly wound on the cable core, and the asphalt waterproof layer 8 can be separated in the aluminum wire armor layer 9 to prevent outward seepage.

Preferably, the low-smoke halogen-free flame-retardant sheath layer 11 is made of polyolefin materials, the minimum tensile strength before and after aging is higher than that of ST8 type low-smoke halogen-free flame-retardant polyolefin materials, the shore hardness D method is used for realizing the termite-proof function of the sheath, and the halogen-free low-smoke flame-retardant performance meets the indoor laying requirement; the semiconductive sheath layer 12 is made of polyolefin materials, and meets the requirements of double-layer co-extrusion process of the outer sheath and the semiconductive requirements.

Preferably, the number of the pair twisting units is 20.

The utility model provides a 20P double-deck sheath monitoring communication cable can satisfy the user to the steamed low fire-retardant requirement of cigarette and the experimental requirement of nothing of cable simultaneously.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (7)

1. The utility model provides a communication cable is monitored to double-deck sheath of 20P, includes a plurality of pair twist units, has PET area (4) in the outside cladding of a plurality of pair twist units, is equipped with the inner sheath in the outside of PET area (4), and the outside of inner sheath is equipped with metallic shield, is equipped with waterproof armor, its characterized in that in metallic shield's outside: the double-layer outer sheath is arranged outside the waterproof armor layer and comprises a low-smoke halogen-free flame-retardant sheath layer (11) on the inner side and a semi-conductive sheath layer (12) on the outer side.

2. The 20P double-jacketed monitoring communication cable of claim 1, wherein: the pair twist unit comprises a conductor (1) and XLPE insulation (2) outside the conductor (1), and filling paste (3) is filled among the pair twist units.

3. The 20P double-jacketed monitoring communication cable of claim 1, wherein: the inner sheath is MDPE inner sheath (5), the metal shielding layer comprises a copper strip (6) and a lead sheath (7), the copper strip (6) wraps the MDPE inner sheath (5), and the lead sheath (7) is arranged outside the copper strip (6).

4. The 20P double-jacketed monitoring communication cable of claim 1, wherein: the waterproof armor layer comprises an aluminum wire armor layer (9) and an asphalt waterproof layer (8), the asphalt waterproof layer (8) is arranged outside the metal shielding layer, and the aluminum wire armor layer (9) is arranged outside the asphalt waterproof layer.

5. The 20P double-jacketed monitoring communication cable of claim 1, wherein: and a non-woven fabric (10) is arranged between the waterproof armor layer and the double-layer outer sheath.

6. The 20P double-jacketed monitoring communication cable of claim 1, wherein: the low-smoke halogen-free flame-retardant sheath layer (11) is made of polyolefin materials, and the semi-conductive sheath layer (12) is made of polyolefin materials.

7. The 20P double-jacketed monitoring communication cable of claim 1, wherein: the number of the pair twisting units is 20.

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