CN204257255U - Crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel - Google Patents

Abstract

The utility model provides a kind of crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel, conductor is pressed by layering that vertical bag semiconductor waterstop (ZDBS) is stranded to be formed, described conductor and successively a wrapped ZDS waterstop outside conductor and insulating barrier form cable core, the outer wrapped 2nd ZDS waterstop of described cable core, the fill gaps between described cable core and the 2nd ZDS waterstop has waterproofing rope; Extrude inner sheath outside described 2nd ZDS waterstop, the outer knit wire armouring of described inner sheath, the outer wrapped 3rd ZDS waterstop of described wire armouring, extrudes oversheath outside described 3rd ZDS waterstop.The utility model crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel is rational in infrastructure, compact, and multilayer stop water effectively ensure that this cable has the overall block-water performance of good conductor, cable core and sheath.

Description

Marine cross-linked polyethylene insulated overall water-blocking power cable

technical field

The utility model relates to the cable technology, in particular to a marine cross-linked polyethylene insulated integral water-blocking power cable.

Background technique

During the long-term use of the cable, the normal use of the cable is affected by the erosion of moisture and water, especially on board, because of the humidity, the water resistance of the cable is particularly important. At present, the water-tight, waterproof and water-blocking cables on the market are all radial water-blocking of the cable section, which is realized by the cable core and sheath water-blocking tape, but this water-blocking method is to block water outside the conductor and the cable core. , once water flows into the conductor, the water blocking effect is not good, and it is easy to break down the insulation sheath, resulting in cable accidents.

Utility model content

The purpose of this utility model is to propose a marine cross-linked polyethylene insulated overall water-blocking power cable for the problem that the above-mentioned existing marine cables are radially water-blocking, resulting in easy breakdown of the insulation sheath. The water structure effectively ensures the water resistance of the cable.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a marine cross-linked polyethylene insulated integral water-blocking power cable, the conductor is made of copper conductors layered and twisted, and each layer of copper conductors is tightly pressed and longitudinally wrapped halfway. Conductive resistance water tape (ZDBS), the conductor and the first ZDS water resistance tape and insulating layer wrapped around the conductor in turn constitute the cable core, the second ZDS water resistance tape is wrapped around the cable core, and the cable core The gap between the second ZDS water-blocking tape and the second ZDS water-blocking tape is filled with water-blocking rope; the second ZDS water-blocking tape is extruded with an inner sheath, the inner sheath is braided with metal wire armor, and the metal wire armor is outer The third ZDS water-blocking tape is wrapped around, and the third ZDS water-blocking tape is extruded and wrapped with an outer sheath.

Further, the insulating layer is a cross-linked polyethylene (XLPE) insulating layer.

Further, both the inner sheath and the outer sheath are flame-retardant polyolefin sheaths.

Further, the number of the cable cores is 1-3, preferably 3.

Further, the wire armor is tinned copper wire or galvanized steel wire braided armor.

Further, the compression coefficient is not less than 0.9.

The utility model marine cross-linked polyethylene insulated overall water-blocking power cable has a simple, reasonable and compact structure, and has the following advantages compared with the prior art:

(1) The conductor of the cable of the present invention is formed by layered twisting of copper conductors, and each layer of copper conductors is tightly pressed with longitudinally wrapped semi-conductive resistance water tape, and the semi-conductive resistance water tape can form longitudinal water-blocking in the conductor gap;

(2) The gap between the cable core and the second ZDS water blocking belt is filled with water blocking ropes to achieve the purpose of radial water blocking;

(3) The water blocking of the cable of the utility model is composed of the following composites: the semiconducting resistance water belt (ZDBS) layered and pressed tightly in the conductor layer, the first water blocking belt wrapped around the conductor, and the outer wrapped wrap of the cable core The second ZDS water-blocking zone and the third ZDS water-blocking zone; the multi-layer water-blocking structure effectively ensures that the cable has good conductor, cable core and sheath overall water-blocking performance, reducing or eliminating the occurrence of cable water ingress .

Description of drawings

Fig. 1 is a structural schematic diagram of a marine cross-linked polyethylene insulated integral water-blocking power cable of the present invention.

Among them: 1-conductor; 2-first ZDS water blocking tape; 3-insulation layer; 4-second ZDS water blocking tape; 5-water blocking rope; 6-inner sheath; 7-wire armor; 8- The third ZDS water blocking belt; 9-outer sheath.

Detailed ways

The utility model is further described below in conjunction with embodiment:

This embodiment discloses a marine cross-linked polyethylene insulated overall water-blocking power cable with excellent water-blocking performance. Its structure is shown in Figure 1, including a conductor 1, which is an annealed tinned copper conductor conforming to the provisions of IEC60228 or bare copper conductors. The conductor 1 is made of copper conductors layered and twisted, and each layer of copper conductors is tightly pressed with a longitudinally wrapped semiconducting resistance water belt (ZDBS), that is, each layer of copper conductors is longitudinally wrapped with a semiconducting resistance water belt from the inside to the outside. Tape, semi-conductive resistance water tape is to form a water resistance for the copper conductor gap. When the cable conductor is twisted, it is layered and pressed tightly with the semi-conductive resistance water belt (ZDBS), which ensures the tightness of the conductor and the performance of the water-blocking structure. The compression coefficient is not less than 0.9, the conductor surface is smooth, free of oil, free of burrs and sharp edges that damage shielding and insulation, and free of raised or broken single wires. The composition and performance of the conductor comply with the regulations of IEC60092-350.

The conductor, the first ZDS water-blocking tape 2 and the insulating layer 3 wrapped around the conductor in turn constitute a cable core, and the number of cable cores in this embodiment is three. The purpose of wrapping the first ZDS water-blocking tape outside the conductor without leaving gaps is to effectively prevent water from penetrating into the cable conductor. It plays a good role in the complete water blocking of the conductor. The insulating layer 3 is a cross-linked polyethylene (XLPE) insulating layer, and the insulation adopts a fully enclosed chemical cross-linking process. ZDS water resistance tape is non-conductive resistance water tape.

The second ZDS water-blocking tape 4 is wrapped around the cable core, and the gap between the cable core and the second ZDS water-blocking tape 4 is filled with a filler. In this embodiment, the filler is a water-blocking rope 5 to achieve longitudinal The purpose of water blocking: the number of the water blocking ropes is 3, which are evenly distributed between the cable core and the 4 second ZDS water blocking belts. It can be understood that the filler swells tightly with water and has no voids. The filler shall be compatible with the operating temperature of the cable and shall not have a harmful effect on the insulating material.

The second ZDS water blocking tape 4 is extruded and covered with an inner sheath 6, and the inner sheath 6 is braided with wire armor. In this embodiment, the wire armor 7 is tinned copper wire or galvanized steel wire braided armor. Pack. The nominal diameter of the wire used in the wire armor 7 shall comply with the requirements of IEC60092-350.

The wire armor is wrapped with a third ZDS water-blocking tape 8 , and the third ZDS water-blocking tape 8 is wrapped with an outer sheath 9 . Both the inner sheath and the outer sheath in this embodiment are flame-retardant polyolefin sheaths. The thickness of the sheath complies with the requirements of IEC60092-353. The average thickness of the outer sheath should not be less than the nominal value, and the minimum thickness at any point should not be less than 85% of the nominal value. The appearance of the outer sheath should be round, smooth and free of damage.

The marine cross-linked polyethylene insulated overall water-blocking power cable described in this embodiment is suitable for ships and humid areas, and has good overall radial, longitudinal, and conductor water-blocking properties to prevent water from infiltrating and penetrating in all directions. It is safe, reliable, and has a long service life. .

The utility model is not limited to the marine cross-linked polyethylene insulated overall water-blocking power cable described in the above embodiments, wherein the change of the conductor material, the change of the number of cable cores, the change of the material of the inner sheath and the outer sheath, the wire armor The change of dress, the change of water-blocking rope shape and quantity are all within the protection scope of the present utility model.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (6)

1. a crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel, it is characterized in that, conductor is formed by copper conductor layer-stranding, vertical bag semiconductor waterstop is pressed between every layer of copper conductor, described conductor and successively a wrapped ZDS waterstop outside conductor and insulating barrier form cable core, the outer wrapped 2nd ZDS waterstop of described cable core, the fill gaps between described cable core and the 2nd ZDS waterstop has waterproofing rope; Extrude inner sheath outside described 2nd ZDS waterstop, the outer knit wire armouring of described inner sheath, the outer wrapped 3rd ZDS waterstop of described wire armouring, extrudes oversheath outside described 3rd ZDS waterstop.

2. crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel according to claim 1, it is characterized in that, described insulating barrier is crosslinked polyetylene insulated layer.

3. crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel according to claim 1, it is characterized in that, described inner sheath, oversheath are flame-retardant polyolefin sheathed.

4. crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel according to claim 1, it is characterized in that, the number of described cable core is 1-3 root.

5. crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel according to claim 1, is characterized in that, described wire armouring is tinned copper wire or zinc-coated wire braiding armouring.

6. crosslinked polyetylene insulated overall water-resistant power cable peculiar to vessel according to claim 1, is characterized in that, described in press coefficient and be not less than 0.9.