CN217521776U - Flame-retardant anti-icing control cable - Google Patents

Abstract

The utility model discloses a fire-retardant anti-icing control cable mainly sets up the cable band through at the conductor outsourcing, makes the cable have high fire behaviour, has solved the cable open air and has laid, and the frozen problem of cable surface is equipped with simultaneously and synthesizes ageing-resistant, the low temperature resistance that the sheath has improved the cable. The anti-icing control cable comprises a copper conductor, an insulating layer, a flame-retardant filling rope, a flame-retardant belt, a shielding layer, an inner protective layer, an armor layer, a cold-resistant flame-retardant protective layer and an anti-icing protective layer.

Description

Flame-retardant anti-icing control cable

Technical Field

The invention relates to a control cable, in particular to a flame-retardant anti-icing control cable.

Background

The traditional control cables mainly comprise PE, PVC, polyolefin and the like, but the control cables are easy to harden, have reduced mechanical properties, crack sheaths and the like at low temperature, and bring hidden troubles to the electric safety. Meanwhile, the protective layers made of the materials have the icing problem in the ice and snow environment. The thick ice layer can make the cable bear larger suspension force, and in addition, the mechanical property of the sheath material is reduced in a low-temperature environment, so that the problems of sheath separation, conductor breaking, insulation cracking, terminal loosening and the like are easily caused, and finally the cable fault is caused.

In order to overcome the technical problem, the publication No. CN206819787U discloses a utility model patent named as "an anti-icing cable", which includes a cable core, a reinforcement layer, a heating layer and an outer sheath are sequentially sleeved on the outer side of the cable core from inside to outside, the reinforcement layer includes an inner shielding layer, an outer insulating layer and a reinforcing rib located between the inner shielding layer and the outer insulating layer, the inner shielding layer directly contacts with the reinforcing rib, the outer insulating layer is bonded and fixed with the reinforcing rib, the heating layer is a self-heating material when meeting air, the outer sheath is formed by closely arranging a plurality of equally spaced connection strips integrated with the strips of flame retardant material. This scheme utilizes the gap that produces when the outer fracture of cable and the contact with the spontaneous heating material of air to produce the heat to reach the effect that prevents the cable from freezing, nevertheless lasting fracture can make the security variation of cable, slowly consume of spontaneous heating material be equivalent to passively let the crack grow, probably make rainwater or snow water infiltration, thereby bury down the potential safety hazard.

Disclosure of Invention

In order to solve the problems of hardening, mechanical property reduction, sheath cracking and icing of the control cable at low temperature, the invention provides the flame-retardant anti-icing control cable.

The technical scheme adopted by the invention for solving the technical problem comprises the following steps: the outermost layer of cable is equipped with cold-resistant layer, prevent that cable surface drop from condensing into ice and snow, cold-resistant layer inlayer is equipped with fire-retardant layer, stop the inside spontaneous combustion that takes place of cable, and keep cable inside not influenced by external cold factor, fire-retardant layer inlayer is equipped with filling layer and conductor layer, wherein the conductor layer setting is at cable innermost, fire-retardant layer contains fire-retardant filler, fire-retardant filler is filled in the gap of conductor layer, thereby prevent the conductor spontaneous combustion.

Preferably, the cold-resistant layer comprises an anti-icing protective layer, the anti-icing protective layer is a combined protective layer of a cold-resistant flame-retardant polyethylene sheath material (PE) and polyvinylidene chloride (PVDF), and the anti-icing protective layer combines the advantages of the PE and the PVDF in electrical and physical aspects, so that the mechanical strength of the protective layer is improved, and the tensile capacity of the cable is greatly improved; PVDF has the characteristics of strongest toughness, low friction coefficient, weather aging resistance and the like, so that the outer surface of the cable has extremely strong hydrophobicity, water drops are not easy to gather and condense on the surface of the cable, and the effect of preventing the surface of the cable from being iced is realized.

Preferably, the flame-retardant layer comprises a flame-retardant belt and a cold-resistant sheath layer, the cold-resistant sheath layer is a polyethylene sheath layer, the thickness of the cold-resistant sheath layer is set to be 0.2-0.5 mm, the cold-resistant sheath layer with the thickness can effectively maintain the temperature inside the cable, block the cold outside the cable, and enable the whole volume of the cable not to be too large.

Preferably, the outer layer of the flame-retardant belt is surrounded with a shielding layer, the shielding layer comprises a plurality of copper wires, the weaving density range of the copper wires is set to be 78% -82%, the diameter range of the copper wires is selected to be 0.1-0.5 mm, and the shielding layer woven by the copper wires mainly plays a role in electromagnetic shielding.

Preferably, the shielding layer is externally wrapped with an inner protection layer, the armor layer is arranged outside the inner protection layer and arranged on the inner layer of the cold-resistant sheath, the inner protection layer is a double-layer inner sheath formed by combining a halogen-free low-smoke high-flame-retardant tape and halogen-free low-smoke flame-retardant polyolefin, and the advantages of the inner protection layer and the double-layer inner sheath in electrical and physical aspects are combined, so that the inner protection layer of the cable meets the flame retardant performance; the armor layer is a steel tape armor, and the steel tape material has high hardness and toughness and is mainly used for protecting the mechanical structure of the cable.

Preferably, the flame-retardant material is a flame-retardant filling rope, the flame-retardant filling rope is filled in gaps formed by arranging the conductor units and is combined with the conductor units into a whole, the flame-retardant belt is wrapped on the outer layer of the combined whole of the filling rope and the conductor units, and the flame-retardant filling rope is fully filled in the gaps of the conductor units and is combined into a cable, so that the flame retardance is realized effectively, and the safe operation inside the cable is guaranteed.

Preferably, the conductor unit comprises a copper conductor and an insulating layer, the insulating layer is extruded outside the copper conductor, one of the conductor units is arranged at the center, the other conductor units are arranged around the conductor unit at the center, and the thickness of the insulating layer coated outside the conductor is smaller, so that the outer diameter of the cable is reduced, the volume and the weight of the whole cable are reduced, and the structure of the cable is more compact.

The control cable has the advantages that the control cable has high flame retardant performance, the problem that the cable is frozen on the surface of the cable when the cable is laid outdoors is effectively solved, the freezing problem on the surface of the cable and the operation fault of the cable line caused by the suspension force are reduced, meanwhile, the environmental aging resistance of the protective layer and the low temperature resistance of the cable are improved by the combined protective layer consisting of the PE and the PVDF, the integral operation safety of the cable is greatly improved, and the service life of the cable is greatly prolonged.

Drawings

FIG. 1 is a schematic diagram of the present invention.

In the figure: 1. copper conductor 2, insulating layer 3, flame-retardant filling rope 4, flame-retardant belt 5, shielding layer 6, inner protective layer 7, armor layer 8, cold-resistant sheath 9 and anti-icing sheath

Detailed Description

The invention is further illustrated with reference to the figures and examples.

Example 1:

in fig. 1, the structure of the flame-retardant anti-icing control cable comprises a copper conductor 1, an insulating layer 2, a flame-retardant filling rope 3, a flame-retardant tape 4, a shielding layer 5, an inner protective layer 6, an armor layer 7, a cold-resistant protective layer 8 and an anti-icing protective layer 9 in sequence from inside to outside. Wherein, a copper conductor 1 is arranged in the middle, the other copper conductors 1 are arranged in a surrounding way, the copper conductor 1 is wholly wrapped by a cabling wrapping tape, each copper conductor 1 is wrapped by an insulating layer 2, the copper conductor 1 is wholly wrapped by a cabling wrapping tape, a fire-retardant filling rope is used for filling between a cable core of the copper conductor 1 and the insulating layer 2 to be round, and the completely filled cable core is overlapped and wrapped and bundled by a halogen-free low-smoke high-fire-retardant tape, the cable core is protected from being damaged while the round of the cable is ensured, the insulating layer 2 is made of silane cross-linked polyethylene insulating material, the cross-linked polyethylene has excellent electrical property and good mechanical and physical properties, so the thickness of the insulating layer of the conductor wrapping is smaller, the outer diameter of the cabling is reduced, the cabling wrapping tape is wrapped by a shielding layer 5, the shielding layer 5 is wrapped by an inner protection layer 6, the inner protection layer 6 is wrapped by the inner protection layer 6 and is provided with an armor layer 7, the outer part of the armor layer 7 is provided with a cold-resistant flame-retardant outer protective layer 8, the outer part of the outer protective layer is extruded with an anti-icing protective layer 9, and the thickness of the anti-icing protective layer 9 is about 0.2 mm.

Among the control cable, the cross section of the copper conductor 1 who adopts is circular, compares in other shapes, and this shape does not have edges and corners, and difficult wearing and tearing, parcel insulating layer prevent the electric leakage on the copper core of copper conductor 1, for increasing power supply efficiency, closely around having a plurality of copper conductor 1 of assisting around main copper conductor 1, through the cross-sectional area of increase wire, improve power supply efficiency. Because copper conductor 1 is the metal, the heat conductivity of metal is better, and in the power supply process, the temperature rises easily, consequently, adopts low smoke and zero halogen high fire-retardant area 4 to wrap up in a plurality of copper conductor 1's periphery, and the space between fire-retardant area 4 and the copper conductor 1 is filled through fire-retardant filling rope 3 for fixed copper conductor 1 is in the relative position of control cable and prevent that the conductor from appearing the conflagration in the power supply process. The in-process of control cable power transmission can receive the influence of other signals of telecommunication, leads to the power supply unstable, so be equipped with copper wire shielding layer 5 outside fire-retardant outband for the shielding signal of telecommunication, for fixed and protection inside control cable structure, set up interior sheath 6 and armor 7 outside copper wire shielding layer 5. In order to improve the anti-icing and cold-resistant performance of the control cable, the outer protective layer is designed to be a combined protective layer of PE and PVDF.

This embodiment provides a high fire-retardant anti-icing control cable, has high fire behaviour, and the effectual cable of having solved is laid outdoors simultaneously, and in the emergence of the icing problem of cable surface, the operation trouble that the icing problem of cable surface pendulous power brought the cable run has been reduced, and the combination sheath that PE and PVDF constitute has simultaneously improved the environmental aging resistance of sheath and the low temperature resistant performance of cable, has improved the whole operation safety and the cable life of cable greatly.

The foregoing detailed description is intended to be illustrative of the present invention rather than limiting, and that other variations and modifications may be made without departing from the spirit or scope of the invention as set forth in the appended claims.

Claims (5)

1. A flame-retardant anti-icing control cable is characterized by comprising

The cold-resistant layer is arranged on the outermost layer of the cable and used for preventing water drops on the surface of the cable from condensing and accumulating snow;

the flame-retardant layer is arranged on the inner layer of the cold-resistant layer, prevents the internal spontaneous combustion of the cable and isolates the external cold of the cable, and the flame-retardant layer comprises a flame-retardant belt (4);

the filling layer is arranged on the inner layer of the flame-retardant layer and is provided with flame-retardant objects for preventing the conductor from spontaneous combustion, the flame-retardant objects are flame-retardant filling ropes (3), the flame-retardant filling ropes are filled in gaps formed by arranging the conductor units and combined with the conductor units into a whole, and the flame-retardant belt (4) is wrapped on the outer layer of the combined whole of the filling ropes (3) and the conductor units;

and the conductor layer is arranged on the innermost layer of the cable and comprises a plurality of conductor units.

2. The flame-retardant anti-icing control cable according to claim 1 wherein the flame-retardant layer further comprises a cold-resistant sheath (8), said cold-resistant sheath being a polyethylene sheath and having a thickness set in the range of 0.2 to 0.5 mm.

3. The flame-retardant anti-icing control cable according to claim 2, characterized in that the outer layer of the flame-retardant belt (4) is provided with a shielding layer (5) in a surrounding manner, the shielding layer comprises a plurality of copper wires, and the weaving density of the copper wires is set to be 78% -82%.

4. The flame-retardant anti-icing control cable according to claim 3, characterized in that the shielding layer (5) is externally wrapped with an inner sheath (6), an armor layer (7) is arranged outside the inner sheath, the armor layer is arranged on the inner layer of the cold-resistant sheath (8), the inner sheath is a double-layer inner sheath formed by combining a halogen-free low-smoke high-flame-retardant tape and halogen-free low-smoke flame-retardant polyolefin, and the armor layer is a steel tape armor.

5. The flame retardant anti-icing control cable according to claim 4 wherein said conductor units comprise a copper conductor (1) and an insulation layer (2) extruded about the exterior of the copper conductor, one of said conductor units being disposed centrally most and the remaining conductor units being disposed about the central conductor unit.

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