CN208444654U - Fire-type armouring medium-pressure power cable - Google Patents

Abstract

The utility model discloses a kind of fire-type armouring medium-pressure power cable, including more cable cores, strengthening cores, the more cable cores are arranged symmetrically centered on strengthening core；The single cable core successively includes conductor, conductor shielding, conductor insulation, insulation shielding and metallic shield from the inside to the outside；Low-smoke bittern-free highly fire-proof band is surrounded with outside all cable cores；Thermal insulation layer, armor and sheath are successively coated with outside the low-smoke bittern-free highly fire-proof band；The gap location of the low-smoke bittern-free highly fire-proof band and cable core and strengthening core is equipped with glass fibre filled layer.Fire-type armouring medium-pressure power cable in the utility model, fire protection flame retarding is good, while mechanical performance with higher.

Description

Fire-type armouring medium-pressure power cable

Technical field

The utility model relates to field of cable technology, in particular to a kind of fire-type armouring medium-pressure power cable.

Background technique

It is intensive in cable layings such as skyscraper, postal and telecommunication entities, railway, ships along with the continuous development of social economy Place, cable cause fire caused by loss get worse, seriously affected the development of industrial or agricultural and the life of the people.Such as Influence when generation fire to low-voltage cable is smaller, and replacement is also easier to, and fire occurs for medium-pressure power cable and then can Cause large effect.Meanwhile frictional force when medium-pressure power cable in the prior art, more cable core discontinuity and torsion Greatly, therefore cable core is easy disconnected core.Therefore, medium-pressure power cable also proposed it higher due to the raising of voltage class Requirement, in use process, do not require nothing more than it with preferable fire protection flame retarding, also require its mechanical performance with higher, It is benefited from the service life so as to extend it, reduction frequently replaces it.

Utility model content

The technical problem to be solved by the present invention is to provide a kind of fire-type armouring medium-pressure power cable, fire protection flame retardings It is good, while mechanical performance with higher.

In order to solve the above-mentioned technical problem, the technical solution of the utility model are as follows:

A kind of fire-type armouring medium-pressure power cable, including more cable cores, strengthening cores, the more cable cores are with strengthening core Center is arranged symmetrically；The single cable core from the inside to the outside successively include conductor, conductor shielding, conductor insulation, insulation shielding and Metallic shield；Low-smoke bittern-free highly fire-proof band is surrounded with outside all cable cores；The low-smoke bittern-free highly fire-proof band it is outer according to It is secondary to be coated with thermal insulation layer, armor and sheath；The gap location of the low-smoke bittern-free highly fire-proof band and cable core and strengthening core is equipped with Glass fibre filled layer.

Further, the conductor is using meeting the of National Standard of the People's Republic of China GB/T 3956-2008 requirement 2 class tinned conductors, press for circle.

Further, the strengthening core is kevlar fiber kernmantle.

Further, the conductor insulation is that Tao Kaiization irradiates low smoke, zero halogen fire resistant polymeric.

Further, the sheath uses low-smoke non-halogen flame-retardant weathering material guards.

Further, the thermal insulation layer is made of ceramic fireproof composite band material.

The beneficial effects of the utility model are: the center of power cable uses kevlar fiber kernmantle in the utility model As strengthening core, the weight of cable is not only alleviated, but also effectively increases the mechanical performance of cable；During cable core with strengthening core is The heart is arranged symmetrically, and optimizes the structure of cable core, makes single core uniform force, and be filled using glass fibre, filling is full Full rounding, while glass fiber material good insulating, heat resistance are strong, corrosion resistance is good, high mechanical strength；Low-smoke bittern-free highly fire-proof The setting of band is greatly improved flame retardant property, and thermal insulation layer uses ceramic fireproof composite band, which at high temperature can Heat absorption is decomposed, to reduce the temperature of power cable, improves fire resistance rating.The fire-type armouring medium-pressure power cable, mechanicalness Can be good, while fireproof flame-retardant effect is good, greatly reduces the danger coefficient of fire.

Detailed description of the invention

Fig. 1 is the utility model cross-sectional structure schematic diagram.

In figure, 1- strengthening core, 2- glass fibre filled layer, 3- conductor, 4- conductor shielding, 5- conductor insulation, 6- insulation screen It covers, 7- metallic shield, 8- low-smoke bittern-free highly fire-proof band, 9- thermal insulation layer, 10- armor, 11- sheath.

Specific embodiment

Specific embodiment of the present utility model is described further with reference to the accompanying drawing.It should be noted that The explanation of these embodiments is used to help to understand the utility model, but does not constitute the restriction to the utility model.This Outside, technical characteristic involved in the various embodiments of the present invention described below is as long as they do not conflict with each other It can be combined with each other.

As shown in Figure 1, a kind of fire-type armouring medium-pressure power cable, including more cable cores and strengthening core 1, the more cables Core is arranged symmetrically centered on strengthening core 1, and wherein symmetric mode is chosen as axial symmetry either central symmetry, using symmetrical expression The layout optimization structure of cable core, make single core uniform force；The single cable core from the inside to the outside successively include conductor 3, Conductor shielding 4, conductor insulation 5, insulation shielding 6 and metallic shield 7；Low-smoke bittern-free highly fire-proof is surrounded with outside all cable cores Band 8；Thermal insulation layer 9, armor 10 and sheath 11 are successively coated with outside the low-smoke bittern-free highly fire-proof band 8；The low cigarette without The gap location of halogen high fire-retardance band 8 and cable core and strengthening core 1 is equipped with glass fibre filled layer 2.Glass fibre is as a kind of performance Excellent inorganic non-metallic material, good insulating, heat resistance are strong, corrosion resistance is good, high mechanical strength.Using low-smoke bittern-free highly Band is fired, the flame retardant property of power cable is greatly improved.Conductor shielding 4, conductor insulation 5, insulation shielding 6 and metallic shield 7 Material therefor is identical as conventional electrical power cable.

Specifically, the conductor 3, which uses, meets the 2nd of National Standard of the People's Republic of China GB/T 3956-2008 requirement Class tinned conductor, presses for circle.

Specifically, the strengthening core 1 is kevlar fiber kernmantle.Using kevlar fiber kernmantle as strengthening core 1, The weight of cable is not only alleviated, but also effectively increases the mechanical performance of power cable.

Specifically, in order to further increase conductor insulation performance, the conductor insulation 5 is that Tao Kaiization irradiation low smoke, zero halogen is resistance to Fiery polymer.

Specifically, the sheath 11 uses low-smoke non-halogen flame-retardant weathering material guards.

The embodiments of the present invention is explained in detail in conjunction with attached drawing above, but the utility model is not limited to be retouched The embodiment stated.For a person skilled in the art, right in the case where not departing from the utility model principle and spirit These embodiments carry out a variety of change, modification, replacement and modification, still fall in the protection scope of the utility model.

Claims (6)

1. a kind of fire-type armouring medium-pressure power cable, including more cable cores, it is characterised in that: it further include strengthening core (1), more The cable core is arranged symmetrically centered on strengthening core (1)；The single cable core successively includes conductor (3), conductor from the inside to the outside Shield (4), conductor insulation (5), insulation shielding (6) and metallic shield (7)；Low smoke and zero halogen height is surrounded with outside all cable cores Fire-retardant band (8)；The low-smoke bittern-free highly fire-proof band (8) is successively coated with thermal insulation layer (9), armor (10) and sheath outside (11)；The gap location of the low-smoke bittern-free highly fire-proof band (8) and cable core and strengthening core (1) is equipped with glass fibre filled layer (2).

2. fire-type armouring medium-pressure power cable according to claim 1, it is characterised in that: the conductor (3) is using symbol The 2nd class tinned conductor that National Standard of the People's Republic of China GB/T 3956-2008 is required is closed, is pressed for circle.

3. fire-type armouring medium-pressure power cable according to claim 1, it is characterised in that: the strengthening core (1) is triumphant Cottonrose hibiscus, which is towed, ties up kernmantle.

4. fire-type armouring medium-pressure power cable according to claim 1, it is characterised in that: the conductor insulation (5) is Tao Kaiization irradiates low smoke, zero halogen fire resistant polymeric.

5. fire-type armouring medium-pressure power cable according to claim 1, it is characterised in that: the sheath (11) is using low Cigarette halogen-free flameproof weathering material guards.

6. fire-type armouring medium-pressure power cable according to any one of claims 1 to 5, it is characterised in that: described heat-insulated Layer (9) is made of ceramic fireproof composite band material.