CN219497389U - High-temperature-resistant overcurrent early-warning type symmetrical communication cable for ship - Google Patents

Abstract

The utility model discloses a high-temperature-resistant overcurrent early warning type marine symmetrical communication cable, which comprises eight twisted wire cores, wherein the eight twisted wire cores are uniformly distributed at intervals in the circumferential direction of a meter-shaped isolation core frame, an octagonal reinforced core body is formed at the center part of the isolation core frame, the central part of the reinforced core body is sleeved with an overcurrent early warning wire core, the twisted wire core comprises two insulating wire cores, each twisted wire core comprises an inner conductor, a modified silicon rubber ceramic mica fireproof composite tape wrapping layer and an FEP insulating layer, the overcurrent early warning wire core comprises two stainless steel monofilament conductors which are arranged at intervals side by side and are jointly wrapped with a polyethylene insulating layer, and the outer part of the cable core is sequentially wrapped with an ETFE resin wrapping layer, a polyurethane elastomer inner sheath layer, a Kevlar torsion-resistant inner woven net, a double-layer steel wire armor layer, a Kevlar torsion-resistant outer woven net and a polyurethane elastomer outer sheath layer. The communication cable has excellent high temperature resistance, and can provide early warning in time when overcurrent occurs, so that the cable ignition accident is prevented.

Description

High-temperature-resistant overcurrent early-warning type symmetrical communication cable for ship

Technical Field

The application relates to the technical field of cables, in particular to a high-temperature-resistant overcurrent early-warning type symmetrical communication cable for a ship.

Background

The marine cable comprises a marine power cable, a marine control cable and a marine communication cable, the marine symmetrical communication cable is mainly applied to signal transmission and control systems in ship telecommunication, electronic computers and information processing equipment, and with the rapid development of river and ocean transportation industry and ocean engineering, the technical requirements of various marine information equipment on the communication cable are increasingly improved. Because the marine communication cable cannot be directly replaced by the common cable under the special laying environment on the ship, the marine communication cable needs to have excellent high-low temperature resistance and mechanical property, can bear a certain degree of slight impact to improve durability, and can take countermeasures in time before the cable has a fire accident if the cable has an early warning function when the current is overlarge, so that the fire accident of the cable is prevented from happening, and the safety performance of the cable is strongly ensured.

Disclosure of Invention

The utility model provides a to the not enough of prior art, the technical problem that solves is to provide a high temperature resistant overcurrent early warning type marine symmetrical communication cable, is applicable to comparatively complicated laying environment on the ship, has good high temperature resistant characteristic, when taking place the overcurrent, can in time provide the early warning, makes cable fire accident prevent in the future, provides powerful guarantee for the safe handling of cable.

The technical problems are solved by the following technical scheme.

The utility model provides a high temperature resistant overcurrent early warning marine symmetry formula communication cable, includes eight twisted wire core and keeps apart core frame circumference interval equipartition through the rice font and form the cable core, the central part that keeps apart the core frame forms the octagon and strengthens the core, it is equipped with the overcurrent early warning core to strengthen core central part cover, twisted wire core includes two insulating core pair and constitutes, insulating core includes inner conductor, modified silicone rubber pottery mica fire-resistant composite tape around covering and FEP insulating layer, the overcurrent early warning core includes two stainless steel monofilament conductor side by side interval setting and cladding polyethylene insulating layer jointly, stainless steel monofilament conductor diameter is less than inner conductor diameter, the cable core outside cladding has ETFE resin around covering, polyurethane elastomer inner sheath layer, kevlar antitorque inner mesh, double-deck steel wire armor layer, kevlar antitorque outer mesh and polyurethane elastomer outer sheath layer in proper order.

Preferably, the inner conductor is a circular conductor structure formed by concentrically twisting and compacting a plurality of tinned copper wires with the wire diameters not smaller than 0.05 mm.

Preferably, the inner conductor lay length is five to fifteen times the inner conductor diameter.

Preferably, the wrapping layer of the modified silicone rubber ceramic mica fireproof composite tape is a multilayer lapping wrapping structure of the modified silicone rubber ceramic mica fireproof composite tape, and the lapping rate is 20-30%.

Preferably, the ETFE resin wrapping layer is an ETFE resin tape multilayer lapping wrapping structure, and the ETFE resin tape thickness is 10 μm to 20 μm.

Preferably, the ETFE resin is no more than 0.1mm thick around the cladding.

Preferably, the ETFE resin is wound around the cladding in a direction opposite to the twisted pair core.

Preferably, the Kevlar torsion-resistant inner woven mesh and the Kevlar torsion-resistant outer woven mesh are formed by mutually spirally winding inner and outer double-layer Kevlar stay wires in reverse directions.

Preferably, the polyethylene insulation layer is an HDPE resin insulation layer.

Preferably, the rice-shaped isolation core frame is an LDPE resin isolation core frame.

The beneficial effects of this application:

1. the modified silicone rubber ceramic mica fireproof composite tape wrapping layer is added to the insulated wire core, and has excellent fireproof and heat-insulating properties, so that heat conduction to the FEP insulating layer is effectively slowed down, and the high-temperature resistance of the cable is improved. Through increasing the overcurrent early warning sinle silk in the cable core, because the fusing point of the polyethylene insulating layer of overcurrent early warning sinle silk is less than the fusing point of the FEP insulating layer of insulating sinle silk, when the overcurrent appears, the insulating layer of overcurrent early warning sinle silk melts earlier for two stainless steel monofilament conductors direct contact takes place the short circuit, thereby plays timely early warning function, before insulating sinle silk melts and catches fire, on-the-spot operating personnel can take measures in time, makes the cable catch fire accident prevent in the future, provides powerful guarantee for the safe handling of cable.

2. The anti-torsion inner and outer woven meshes are additionally arranged on the inner side and the outer side of the double-layer steel wire armor layer, so that the local stress concentration of the armor layer is reduced, the torque force during bending is reduced, the flexibility and the tensile resistance of the armor layer are improved, the mechanical strength of a cable is ensured, the inner and outer sheath layers of the polyurethane elastomer are effectively protected, the cracking of the sheath is restrained, and the durability and the usability are improved.

And 3, the ETFE resin has small sliding friction resistance around the cladding, improves the flexibility and bending resistance of the cable, reduces the local stress concentration of the cable core, and ensures the stability and the balance of the cable core structure.

Drawings

Fig. 1 is a schematic cross-sectional structure of an embodiment of the present application.

Reference numerals illustrate:

the cable comprises a 1-pair twisted wire core, a 2-reinforced core body, a 3-overcurrent early warning wire core, a 4-insulated wire core, a 5-inner conductor, a 6-modified silicone rubber ceramic mica fireproof composite tape wrapping layer, a 7-FEP insulating layer, an 8-stainless steel monofilament conductor, a 9-polyethylene insulating layer, a 10-ETFE resin wrapping layer, an 11-polyurethane elastomer inner sheath layer, a 12-Kevlar anti-torsion inner woven net, a 13-double-layer steel wire armor layer, a 14-Kevlar anti-torsion outer woven net and a 15-polyurethane elastomer outer sheath layer.

Description of the embodiments

The terminology used in the description of the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application, as will be described in detail with reference to the accompanying drawings.

Referring to fig. 1, the high-temperature-resistant overcurrent early warning type marine symmetrical communication cable of the embodiment of the application comprises eight twisted wire cores 1, wherein cable cores are uniformly formed at intervals in the circumferential direction of a rice-shaped isolation core frame, for example, the rice-shaped isolation core frame is an LDPE resin isolation core frame. The central part of the isolation core frame forms an octagonal reinforced core body 2, and an overcurrent early warning wire core 3 is sleeved at the central part of the reinforced core body 2. The twisted pair wire core 1 comprises two insulated wire cores 4, wherein each insulated wire core 4 comprises an inner conductor 5, a modified silicone rubber ceramic mica fireproof composite tape wrapping layer 6 and an FEP insulating layer 7, and specifically, the inner conductor 5 is formed by concentrically twisting a plurality of tinned copper wires with the wire diameters not smaller than 0.05mm and compacting the tinned copper wires to form a circular conductor structure, and further, the twisting distance of the inner conductor 5 is five to fifteen times the diameter of the inner conductor 5. In one embodiment, the wrapping layer 6 of the modified silicone rubber ceramic mica fireproof composite tape is a multilayer lapping wrapping structure of the modified silicone rubber ceramic mica fireproof composite tape, and the lapping rate is 20-30%. The overcurrent early warning wire core 3 comprises two stainless steel monofilament conductors 8 which are arranged side by side at intervals and jointly cover a polyethylene insulating layer 9, for example, the polyethylene insulating layer 9 is an HDPE resin insulating layer, and the diameter of each stainless steel monofilament conductor 8 is smaller than that of the inner conductor 5.

The cable core is sequentially coated with an ETFE resin wrapping layer 10, a polyurethane elastomer inner sheath layer 11, a Kevlar torsion-resistant inner woven net 12, a double-layer steel wire armor layer 13, a Kevlar torsion-resistant outer woven net 14 and a polyurethane elastomer outer sheath layer 15, and further, the wrapping direction of the ETFE resin wrapping layer 10 is opposite to the twisting direction of the pair-twisted wire core 1. In one embodiment, the ETFE resin clad layer 10 is an ETFE resin tape multilayer lap-clad structure, and the ETFE resin tape has a thickness of 10 μm to 20 μm. The ETFE resin is no more than 0.1mm thick around the cladding layer 10. In one embodiment, the kevlar torsion-resistant inner woven mesh 12 and the kevlar torsion-resistant outer woven mesh 14 are formed by spirally winding inner and outer double layers of kevlar wires in opposite directions.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although embodiments of the present application have been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. High temperature resistant overcurrent early warning formula marine symmetry formula communication cable, characterized by: including eight pair twisted wire core (1) through the circumference interval equipartition of meter font isolation core frame form the cable core, the central part that keeps apart the core frame forms octagon and strengthens core (2), the cover of strengthening core (2) central part is equipped with overcurrent early warning core (3), pair twisted wire core (1) include two insulating core (4) pair twisted constitution, insulating core (4) include inner conductor (5), modified silicone rubber pottery mica fire-resistant composite tape around covering (6) and FEP insulating layer (7), overcurrent early warning core (3) include two stainless steel monofilament conductor (8) interval setting side by side and cladding polyethylene insulating layer (9) jointly, stainless steel monofilament conductor (8) diameter is less than inner conductor (5) diameter, cable core outside cladding has in proper order ETFE resin around torsion resistant sheath layer (10), polyurethane elastomer inner sheath layer (11), double-deck steel wire armoured layer (13), outer braided wire (14) and polyurethane elastomer outer sheath layer (15).

2. The high temperature and overcurrent resistant early warning type marine symmetrical communication cable according to claim 1, wherein: the inner conductor (5) is a circular conductor structure formed by concentrically twisting and compacting a plurality of tinned copper wires with the wire diameters not smaller than 0.05 mm.

3. The high temperature-resistant overcurrent early warning type marine symmetrical communication cable according to claim 2, characterized in that: the inner conductor (5) has a lay length of five to fifteen times the diameter of the inner conductor (5).

4. The high temperature and overcurrent resistant early warning type marine symmetrical communication cable according to claim 1, wherein: the wrapping layer (6) of the modified silicone rubber ceramic mica fireproof composite belt is a multilayer lapping wrapping structure of the modified silicone rubber ceramic mica fireproof composite belt, and the lapping rate is 20-30%.

5. The high temperature and overcurrent resistant early warning type marine symmetrical communication cable according to claim 1, wherein: the ETFE resin wrapping layer (10) is an ETFE resin tape multi-layer lapping wrapping structure, and the thickness of the ETFE resin tape is 10-20 mu m.

6. The high temperature and overcurrent resistant early warning type marine symmetrical communication cable according to claim 1, wherein: the thickness of the ETFE resin wrapping layer (10) is not more than 0.1mm.

7. The high temperature and overcurrent resistant early warning type marine symmetrical communication cable according to claim 1, wherein: the winding direction of the ETFE resin winding layer (10) is opposite to the winding direction of the pair of twisted wire cores (1).

8. The high temperature and overcurrent resistant early warning type marine symmetrical communication cable according to claim 1, wherein: the Kevlar torsion-resistant inner woven mesh (12) and the Kevlar torsion-resistant outer woven mesh (14) are formed by mutually and reversely spirally winding and weaving inner and outer double-layer Kevlar stay wires.

9. The high temperature and overcurrent resistant early warning type marine symmetrical communication cable according to claim 1, wherein: the polyethylene insulating layer (9) is an HDPE resin insulating layer.

10. The high temperature and overcurrent resistant early warning type marine symmetrical communication cable according to claim 1, wherein: the rice-shaped isolation core frame is an LDPE resin isolation core frame.