CN207938376U - Fire resisting lightweight flexible cable is pressed in one kind - Google Patents

Abstract

Fire resisting lightweight flexible cable is pressed in one kind, there are 3 power lines, every power line from-inner-to-outer includes soft structure copper conductor, conductor shield, insulating layer, insulation screen and metal screen layer, twining package tape wraps up 3 power lines and filler material, twining package tape are followed successively by liner layer, armouring and oversheath outward.Conductor shield is methyl vinyl silicone rubber, and insulating layer is Ceramic silicon rubber, and oversheath is halogen-free anti-flaming polyolefin, and filler material is polypropylene flame redardant reticular fibre.Fire resisting lightweight flexible cable is pressed in one kind of the utility model, the collocation of material specification is superior, simple in structure, outer diameter is small, light-weight, bending radius is small, temperature resistant grade is high, excellent fire retarding performance, is particularly suitable for ships and uses.

Description

Fire resisting lightweight flexible cable is pressed in one kind

Technical field

The utility model is related to power cable fields, especially with regard to pressure fire resisting lightweight flexible cable in one kind.

Background technology

As the biography loser of electric energy needed for ship power, middle pressure fire-resisting flexible cable is directly related to high-power Ship Equipment and exists The life support of safety and personnel under fire condition.

Currently used fire-resisting cable technique mainly has two kinds of structures of Mica tape core and mineral insulation, but both The fire-resisting cable of structure is not used to naval vessel midium voltage cable.Reason is：

(1) Mica tape.Midium voltage cable determines to adopt outside its conductor due to its electric circumstance run under high pressure With conductor shielding, insulation and the three-layer co-extruded structure of insulation shielding.Due to various reasons, inevitably there is hair in conductive surface The defects of thorn, forms cable internal stress concentration or shelf depreciation point, insulation breakdown is easy to cause in long-term load running. Conductor shielding makes to form equipotential between conductor and conductor shielding, is homogenized electric field for eliminating conductor strand defect.Therefore it manufactures Voltage cable cannot take the mode of the wrapped mica tape on conductor, otherwise can destroy the overall structure of insulated wire cores, make conductor screen The effect for losing homogenizing electric field is covered, and the dielectric strength of mica tape is relatively low, and it is strong to bear high electric field, in midium voltage cable Can be breakdown in pressure test or load running, and the fiber of mica belt edge can also form shelf depreciation point, increase cable Partial discharge quantity.

Mineral insulation.The distinguishing feature of mineral insulated cable (i.e. MI cables) coats one layer of inorganic refractory mine outside conductor Object insulating layer is to reach fire resisting purpose, excellent fire retarding performance, but it lays inefficiency, and bending property is very poor, is unable to reach sea Foreign engineer equipment small space is to the flexibility requirements of cable, and cable sealing head terminal complex manufacturing technology, cable cost are high It is expensive.As Mica tape fire-resisting cable, mineral insulation can destroy the overall structure of insulated wire cores for midium voltage cable, make to lead Body shielding loses the effect of homogenizing electric field.

Utility model content

In view of this, the utility model presses fire resisting lightweight flexible cable, material in order to solve the above technical problems, providing in one kind The collocation of matter specification is superior, simple in structure, outer diameter is small, light-weight, bending radius is small, temperature resistant grade is high, excellent fire retarding performance, especially It is suitble to ships to use.

The purpose of this utility model is achieved through the following technical solutions：

Fire resisting lightweight flexible cable is pressed in one kind, there are 3 power lines, every power line from-inner-to-outer includes soft structure copper Conductor, conductor shield, insulating layer, insulation screen and metal screen layer, twining package tape wrap up 3 power lines and filler material, around Band is followed successively by liner layer, armouring and oversheath outward.

Conductor shield is methyl vinyl silicone rubber, and insulating layer is Ceramic silicon rubber, and oversheath is poly- for halogen-free flameproof Alkene, filler material are polypropylene flame redardant reticular fibre.

Preferably, the structure of liner layer is to extrude type structure, can effectively reduce the outside diameter of cable.

Fire resisting lightweight flexible cable is pressed also to be showed on test fire resistance after meticulous material material selection, in this kind It is excellent, when 830 DEG C of test temperature, can left and right circuit for 90 minutes it is off guard destroy, breaker disconnects or conductor disconnects, and The after-applied 3.5 times of test voltages of fire test continue 15 minutes or so it is not breakdown.

The advantageous effect of the utility model compared to the prior art is：

Fire resisting lightweight flexible cable, superior, the simple in structure, outer diameter of material specification collocation are pressed in one kind of the utility model It is small, light-weight, bending radius is small, temperature resistant grade is high, excellent fire retarding performance, be particularly suitable for ships use.

Description of the drawings

Using attached drawing, the utility model is described in further detail, but the embodiment in attached drawing is not constituted to the utility model Any restrictions.

Fig. 1 is a kind of structural schematic diagram of middle pressure fire resisting lightweight flexible cable of the utility model.

Specific implementation mode

In order to facilitate the understanding of those skilled in the art, making the utility model into one below in conjunction with attached drawing and embodiment Step detailed description.

Fig. 1 is please referred to, the utility model embodiment includes：

Fire resisting lightweight flexible cable is pressed in one kind, there are 3 power lines, every power line from-inner-to-outer includes soft structure copper Conductor 11, conductor shield 12, insulating layer 13, insulation screen 14 and metal screen layer 15, twining package tape 2 wrap up 3 power lines With filler material 3, twining package tape 2 is followed successively by liner layer 4, armouring 5 and oversheath 6 outward.

Conductor shield 12 is methyl vinyl silicone rubber, and insulating layer 13 is Ceramic silicon rubber, and oversheath 6 hinders for Halogen Polyolefin is fired, filler material 3 is polypropylene flame redardant reticular fibre.

Preferably, the structure of liner layer 4 is to extrude type structure, can effectively reduce the outside diameter of cable.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this practicality is new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing in the equivalent requirements of the claims will be fallen All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation Involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (2)

1. pressing fire resisting lightweight flexible cable in one kind, which is characterized in that have 3 power lines, every power line from-inner-to-outer packet Include soft structure copper conductor（11）, conductor shield（12）, insulating layer（13）, insulation screen（14）And metal screen layer（15）, Twining package tape（2）Wrap up 3 power lines and filler material（3）, twining package tape（2）It is followed successively by liner layer outward（4）, armouring（5）With outer shield Set（6）；

Conductor shield（12）For methyl vinyl silicone rubber, insulating layer（13）For Ceramic silicon rubber, oversheath（6）For Halogen Fire retardant polyolefin, filler material（3）For polypropylene flame redardant reticular fibre.

2. pressing fire resisting lightweight flexible cable in one kind described in accordance with the claim 1, which is characterized in that liner layer（4）Structure To extrude type structure, the outside diameter of cable can be effectively reduced.