CN216161507U

CN216161507U - Polyolefin medium-voltage cable for ships

Info

Publication number: CN216161507U
Application number: CN202122123275.2U
Authority: CN
Inventors: 谢强恒
Original assignee: Nanyang Hengtianyuan Technology Development Co ltd
Current assignee: Nanyang Hengtianyuan Technology Development Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-04-01
Anticipated expiration: 2031-09-03

Abstract

The utility model provides a polyolefin medium-voltage cable for ships, which belongs to the technical field of wires and cables and comprises a conductor core, wherein the outer surface of the conductor core is provided with a high-temperature electric insulating coating, the outer side of the conductor core is extruded with a polyethylene water-blocking insulating layer, the outer side of the polyethylene water-blocking insulating layer is filled with a water-blocking filling layer, and the outer side of the water-blocking filling layer is provided with a shielding layer; by arranging the double protection of the water-blocking filling layer and the polyethylene water-blocking insulating layer, the water-blocking filling layer expands after absorbing water and prevents the water from continuously diffusing, and the polyethylene water-blocking insulating layer has better waterproof performance and higher dielectric strength, so that the waterproof and moisture-proof capabilities of the cable are effectively improved; the high-temperature electric insulation coating on the outer surface of the conductor core has good high-temperature resistance and insulation performance, improves the use effect of the cable, and is suitable for ships; by adopting the water-blocking filling rope, the polyolefin outer protective layer and the like, the weight of the cable is reduced, and the adaptability of the cable is improved.

Description

Polyolefin medium-voltage cable for ships

Technical Field

The utility model relates to the technical field of wires and cables, in particular to a polyolefin medium-voltage cable for ships.

Background

The ship runs in a special environment, the adopted cable has different performance requirements from the common cable, the ship is in seawater for a long time, the environment is humid, and strong waterproof and moisture-proof capabilities are needed, the existing cable is mostly filled with water-blocking materials for water prevention, the water-blocking materials are generally divided into two categories, one is an active water-blocking material comprising a water-blocking rope, a water-blocking yarn, a water-blocking tape and the like, and the water-blocking powder is utilized to absorb water and swell to block the water from flowing into the cable, so that the water is limited in a small range; the other is a passive water-blocking material, including petroleum filling paste, hot melt adhesive, thermal expansion factice and the like, which actively blocks water outside the cable, generally speaking, because the passive water-blocking material is heavier, the ship cable generally adopts the active water-blocking material to block water, most of the existing ship cables only have a water-blocking rope to resist moisture and block water, but the adhesion of water-blocking powder is poor, and in addition, friction between the water-blocking rope and a mould in the production process can cause a part of the water-blocking powder to fall off, the water-blocking powder on the water-blocking rope is partially uneven and cannot achieve the expected effect, after a long time, the water-blocking effect of the water-blocking rope becomes poor, moisture or humidity is easy to diffuse, a conducting wire is higher than normal temperature during operation, once moisture exists, the conductor is oxidized, the conductor is damaged more rapidly, the service life of the cable is shortened, and even danger is caused.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a polyolefin medium-voltage cable for ships, which has a good waterproof effect and is light in weight.

In order to solve the technical problem, the utility model provides a polyolefin medium-voltage cable for ships, which comprises a conductor core, wherein a high-temperature electric insulation coating is arranged on the outer surface of the conductor core, a polyethylene water-blocking insulation layer is extruded and wrapped on the outer side of the conductor core, a water-blocking filling layer is filled on the outer side of the polyethylene water-blocking insulation layer, a shielding layer is arranged on the outer side of the water-blocking filling layer, a flame-retardant layer is arranged on the outer side of the shielding layer, and a polyolefin low-smoke halogen-free outer protective layer is extruded and wrapped on the outer side of the flame-retardant layer.

Further, the conductor core is a copper conductor core.

Further, the high-temperature electric insulation coating is a ceramic coating.

Furthermore, the water-blocking filling layer is a water-blocking filling rope layer.

Further, the shielding layer is a tin-plated copper wire layer.

Further, the flame-retardant layer is a ceramic flame-retardant layer.

The technical scheme of the utility model has the following beneficial effects:

1. by arranging the double protection of the water-blocking filling layer and the polyethylene water-blocking insulating layer, the water-blocking filling layer expands after absorbing water and prevents the water from continuously diffusing, and the polyethylene water-blocking insulating layer has better waterproof performance and higher dielectric strength, so that the waterproof and moisture-proof capabilities of the cable are effectively improved;

2. the high-temperature electric insulation coating on the outer surface of the conductor core has good high-temperature resistance and insulation performance, improves the use effect of the cable, and is suitable for ships;

3. by adopting the water-blocking filling rope, the polyolefin outer protective layer and the like, the weight of the cable is reduced, and the adaptability of the cable is improved.

Drawings

Fig. 1 is a schematic structural diagram of a polyolefin medium voltage cable for ships according to the present invention.

1. A conductor core; 2. a high temperature electrically insulating coating; 3. a polyethylene water-blocking insulating layer; 4. a water-blocking filling layer; 5. a shielding layer; 6. a flame retardant layer; 7. polyolefin low-smoke halogen-free outer protective layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model, are within the scope of the utility model.

As shown in fig. 1: a polyolefin medium voltage cable for ships comprises a conductor core 1, wherein the conductor core 1 is a copper conductor, the outer surface of the conductor core 1 is provided with a high-temperature electric insulation coating 2, the high-temperature electric insulation coating 2 is a ceramic insulation coating, the high-temperature electric insulation coating 2 can resist high temperature and has good insulation, a polyethylene water-blocking insulation layer 3 is extruded and wrapped on the outer side of the conductor core 1, the polyethylene water-blocking insulation layer 3 has better waterproof performance and higher dielectric strength, moisture is prevented from diffusing and then immersing into the conductor core 1, and a water-blocking filling layer 4 is filled on the outer side of the polyethylene water-blocking insulation layer 3. The flame-retardant layer 6 is arranged on the outer side of the shielding, the polyolefin low-smoke halogen-free outer protective layer 7 is extruded and wrapped on the outer side of the flame-retardant layer 6, toxic gas is generated rarely during combustion, and smoke is small.

According to one embodiment of the present invention, as shown in figure 1,

the flame-retardant layer 6 is a ceramic flame-retardant layer 6, and the ceramic flame-retardant layer 6 is ceramic after encountering high temperature or open fire, so that combustion is prevented, and the fireproof effect of the cable is ensured.

The working method (or working principle) of the utility model is as follows:

the outermost layer of the low-smoke halogen-free outer protection layer 7 is a polyolefin low-smoke halogen-free outer protection layer 7 which is small in secondary damage during combustion, the flame-retardant layer 6 is a ceramic flame-retardant layer 6 which is ceramic after high temperature or open fire, the flame-retardant effect is good, the shielding layer 5 is used for reducing external electromagnetic interference, the water-blocking filling rope expands when water is exposed, when cracks and water seepage occur in the external protection layer, the water-blocking rope absorbs water and expands to prevent water from continuously diffusing, so that the water is limited within a small range, the polyethylene water-blocking insulating layer 3 has good waterproof performance and high dielectric strength, the phenomenon that the expansion effect of the water-blocking filling rope is reduced after long-time use, the water or moisture diffuses and then enters the conductor core 1 can be avoided, and the high-temperature electric insulation coating 2 can resist high temperature and has good insulation performance.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. Polyolefin medium voltage cable for ships comprising a conductor core (1), characterized in that: conductor core (1) surface is equipped with high temperature electrical insulation coating (2), crowded package in conductor core (1) outside has polyethylene insulating layer (3) that blocks water, the packing of polyethylene insulating layer (3) outside that blocks water has filling layer (4) that blocks water, the filling layer (4) outside that blocks water is equipped with shielding layer (5), the shielding outside is equipped with fire-retardant layer (6), crowded package in fire-retardant layer (6) outside has polyolefin low smoke and zero halogen outer jacket (7).

2. The polyolefin medium voltage cable for ships according to claim 1, characterized in that: the conductor core (1) is a copper conductor core.

3. The polyolefin medium voltage cable for ships according to claim 1, characterized in that: the high-temperature electric insulation coating (2) is a ceramic coating.

4. The polyolefin medium voltage cable for ships according to claim 1, characterized in that: the water-blocking filling layer (4) is a water-blocking filling rope layer.

5. The polyolefin medium voltage cable for ships according to claim 1, characterized in that: the shielding layer (5) is a tin-plated copper wire layer.

6. The polyolefin medium voltage cable for ships according to claim 1, characterized in that: the flame-retardant layer (6) is a ceramic flame-retardant layer (6).