CN204991232U - Waterproof corrosion -resistant type cable suitable for mud flat - Google Patents

Abstract

The utility model relates to a waterproof and corrosion-resistant cable suitable for tidal flats. The voltage level of the cable is 8.7/15kV. The interior of the cable is provided with a water-blocking conductor, and the outside of the water-blocking conductor is sequentially covered with a conductor shielding layer and a cross-linked polyethylene material. Insulation layer, insulation shielding layer, semiconducting resistance water tape a, copper tape shielding layer, semiconducting resistance water tape b, aluminum-plastic composite sheath radial water blocking layer, and the composite sheath of the cable are arranged in sequence from inside to outside Reinforced tape wrap, anti-corrosion bituminous polypropylene fiber lining, metal armor and high density polyethylene outer sheath. Among them, there are 3 water-blocking conductors, which are twisted with each other, and the gap between the cable and the composite sheath is filled with non-moisture-absorbing cable-forming materials. The beneficial effect is that it can be effectively waterproof and anti-corrosion no matter in the radial direction or in the longitudinal direction, and by adopting the galvanized steel wire armor layer structure, it can fully bear its own weight and external tensile force.

Description

A waterproof and corrosion-resistant cable suitable for tidal flats

technical field

The utility model discloses a waterproof and corrosion-resistant cable suitable for tidal flats, in particular to a cable which is applied to coastal tidal flats, has high waterproof requirements and has multiple corrosion-resistant properties.

Background technique

Wire and cable are a type of electrical wire products used to transmit power, transmit information and realize electromagnetic energy conversion. One of them, medium-voltage cables, is generally a cable for transmitting electric energy.

The structure of medium voltage cables is generally: conductor, conductor shield, insulation, insulation shield, metal shield and outer sheath, etc. However, due to the limitation of mechanical strength, this kind of medium voltage cable is generally only suitable for laying horizontally in the ground or in pipelines or in the air.

Cables required to be used in the harsh and complex environment of coastal beaches must have waterproof properties. First, the conductors must have longitudinal water resistance; second, the cables must have radial water resistance. Cables have been used in saline environments such as coastal seawater for a long time, and are subjected to intertidal surges, low tide seawater, and sand and gravel erosion, requiring cables to have multiple functions of corrosion resistance and mechanical tension resistance.

When the cable is in contact with water for a long time, the water resistance performance is an important index to consider the medium voltage cable. Because moisture is extremely harmful to cables, if there is no waterproof seal in its structure, it is easy for moisture to penetrate into the cable core. Long-term operation of the conductor in contact with water will lead to oxidation and corrosion, and the resistance of the conductor will be too high; the insulation layer will be eroded by water, and "water branches" will be produced under the action of the electric field, resulting in accelerated aging of the insulation layer and cable failure. For cables used in coastal beaches, if the structure is improved, once water enters, the performance of the cable will decline rapidly and the life will be shortened. Therefore, whether the waterproof performance of the cable meets the requirements of use is very important.

At the same time, when laying with high drop along the beach, the cable is subject to its own gravity and external mechanical tension, so the requirements for the strength and tensile capacity of the cable are relatively high. The metal armor layer is made of ordinary metal materials, and the mechanical strength will be reduced after being corroded by moisture, which cannot achieve the effect of protecting the cable.

Utility model content

In view of the above-mentioned shortcomings, the utility model provides a waterproof and corrosion-resistant cable suitable for tidal flats. The cable has excellent anti-corrosion, high-strength tensile properties and water-blocking effect.

The utility model is achieved through the following technical solutions:

A waterproof and corrosion-resistant cable suitable for tidal flats. The cable body includes an external composite sheath and an internal conductor. The cross-section of the cable is a circular structure. The water-blocking conductor is sequentially covered with a conductor shielding layer, an insulating layer, an insulating shielding layer, a semiconducting resistance water tape a, a copper tape shielding layer, a semiconducting resistance water tape b, and a radial water blocking layer of an aluminum-plastic composite sheath; The composite sheath is sequentially provided with a reinforced tape wrapping layer, an anti-corrosion asphalt polypropylene fiber lining layer, a metal armor layer and an outer sheath from the inside to the outside.

As a further improvement, the utility model has three conductors in total, which are mutually twisted, and the gap between the cable and the composite sheath is filled with non-moisture-absorbing cable-forming materials.

As a further improvement, the water-blocking conductor of the present invention is made of a plurality of copper wires twisted and filled with water-absorbing swelling material.

As a further improvement, the insulating layer of the present invention is made of cross-linked polyethylene.

As a further improvement, the outer sheath of the utility model is made of high-density polyethylene.

As a further improvement, the metal armor layer of the present invention is made of galvanized steel.

As a further improvement, the voltage level of the cables of the present invention is 8.7/15kV.

The benefits of this utility model are:

1. The utility model achieves effective waterproof and anti-corrosion effects by adopting the radial water-blocking layer of the reinforced aluminum-plastic comprehensive sheath, the insulating layer made of cross-linked polyethylene, and the outer sheath made of high-density polyethylene.

2. One side of the aluminum-plastic metal in the radial water blocking layer of the reinforced aluminum-plastic composite sheath is in contact with the insulation shield through the semiconducting resistance water belt to meet the needs of a balanced electric field; the polymer material side is combined with polyethylene through the production process The bonding of the layers can seal the radial water resistance.

3. By adopting the structure of galvanized steel wire armor layer, it is ensured that the cable can fully bear its own weight and external pulling force when it is laid with a high drop, and it plays a very good role in protecting the cable itself.

Description of drawings

Fig. 1 is a schematic diagram of the cross-sectional structure of the utility model.

In the figure, 1. Water blocking conductor, 2. Conductor shielding layer, 3. Insulation layer, 4. Insulation shielding layer, 5. Semiconducting resistance water belt a, 6. Copper tape shielding layer, 7. Semiconducting resistance water belt b , 8. Radial water-blocking layer of aluminum-plastic integrated sheath, 9. Non-moisture-absorbing cable material, 10. Reinforced tape wrapping layer, 11. Anti-corrosion asphalt polypropylene fiber lining layer, 12. Metal armor Layer, 13, outer sheath.

detailed description

As shown in Figure 1, a waterproof and corrosion-resistant cable suitable for tidal flats, with a voltage level of 8.7/15kV, is equipped with a water-blocking conductor 1 inside, and the water-blocking conductor 1 is covered with a conductor shielding layer 2 and cross-linked polymer in turn. Vinyl insulating layer 3, insulating shielding layer 4, semi-conductive resistance water tape a, copper tape shielding layer 6, semi-conductive resistance water tape b7, aluminum-plastic integrated sheath radial water blocking layer 8, composite sheath of the cable The sleeve is sequentially provided with a reinforced tape wrapping layer 10, an anti-corrosion asphalt polypropylene fiber inner lining layer 11, a metal armor layer 12 and an outer sheath 13 made of high-density polyethylene from the inside to the outside. Among them, there are three water-blocking conductors 1, which are twisted with each other, and the gap between the cable and the composite sheath is filled with non-moisture-absorbing cable-forming materials 9 . The water-blocking conductor 1 is a copper conductor, and a plurality of copper wires are filled with water-absorbing swelling materials during stranding.

The utility model adopts the high-density polyethylene material with excellent anti-corrosion performance as the first barrier of radial water resistance and anti-corrosion, and the metal armor layer 11 is made of galvanized steel material, which has excellent waterproof and anti-corrosion properties. , high strength and other characteristics, realize the performance of waterproof, anti-corrosion, and delay seawater corrosion. In addition, the radial water-blocking layer 8 of the aluminum-plastic composite sheath is used as the core radial water-blocking layer, and the copper tape shielding layer 6 is in contact with the insulating shielding layer 4 through the semi-conductive resistance water tape a5 to meet the requirement of a balanced electric field.

Claims (7)

1. A waterproof and corrosion-resistant cable suitable for tidal flats. The cable body includes an external composite sheath and an internal conductor. The cross-section of the cable is a circular structure. It is characterized in that: the conductor is a water-blocking conductor (1) , the water-blocking conductor (1) is coated with: conductor shielding layer (2), insulating layer (3), insulating shielding layer (4), semi-conductive resistance water tape a (5), copper tape shielding layer ( 6), semi-conductive resistance hose b (7), radial water-blocking layer of aluminum-plastic composite sheath (8); said composite sheath is arranged in sequence from inside to outside: reinforced tape wrapping layer (10) , anti-corrosion asphalt polypropylene fiber lining (11), metal armor (12) and outer sheath (13). 2. A waterproof and corrosion-resistant cable suitable for tidal flats according to claim 1, characterized in that: there are 3 water-blocking conductors (1) twisted with each other, and they are in the cable and between the composite sheath. The interstices are filled with non-hygroscopic cabling material (9). 3. A waterproof and corrosion-resistant cable suitable for tidal flats according to claim 1, characterized in that: the water-blocking conductor (1) is made of multiple copper wires twisted and filled with water-absorbing and swelling materials. 4. A waterproof and corrosion-resistant cable suitable for tidal flats according to claim 1, characterized in that: the insulating layer (3) is made of cross-linked polyethylene. 5. A waterproof and corrosion-resistant cable suitable for tidal flats according to claim 1, characterized in that: the outer sheath (13) is made of high-density polyethylene. 6. A waterproof and corrosion-resistant cable suitable for tidal flats according to claim 1, characterized in that: the metal armor layer (12) is made of galvanized steel. 7. A waterproof and corrosion-resistant cable suitable for tidal flats according to claim 1, characterized in that: the voltage level of the cable is 8.7/15kV.