CN201270164Y - Electric cable for wind power generation - Google Patents

Abstract

The utility model discloses a wind power generation cable, which is composed of a cable core, a filling layer, a wrapping tape, an inner sheath, armor and an outer sheath; Conductor and insulation layer extruded outside the conductor, the gap between the insulated wire cores is filled by the filling layer; the outer surface of the insulated wire core and the filling layer is covered with a halogen-free flame-retardant tape; the tape A layer of inner sheath is extruded on the outer surface, the inner sheath is covered with a layer of armor, and an outer sheath is extruded on the outer surface of the armor. The utility model has the advantages of reasonable and simple structure, easy manufacture, low cost and no pollution. The cable has strong flexibility, elasticity, recoverability, tensile resistance, and can effectively inhibit ultraviolet rays.

Description

wind power cable

Technical field:

The utility model relates to a cable technology, in particular to a cable structure used in the field of wind power generation.

Background technique:

As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. Its reserves are huge. The global wind energy is about 2.74×109MW, of which the usable wind energy is 2×107MW, which is 10 times larger than the total amount of water energy that can be developed and utilized on the earth. China's wind energy reserves are large and widely distributed, and the wind energy reserves on land alone are about 253 million kilowatts. With the development of the global economy, the wind energy market has also developed rapidly. In the past five years, the world wind energy market has been growing at a rate of 40% every year. It is estimated that in the next 20-25 years, the world wind energy market will increase by 25% every year. Now, the cost of wind power generation has dropped to 1/5 of what it was in 1980. With the advancement of technology and the development of environmental protection, wind power generation will be fully competitive with coal-fired power generation commercially.

The domestic wind power industry is developing relatively rapidly, but there is still a big gap with the development level of the international wind power industry. Domestic wind power equipment mainly relies on imports and is highly dependent on foreign countries. Although the cost of wind power has dropped a lot, the advantage over thermal power costs is in the short term There are still many obstacles to the development of the wind power industry. Among them, the high manufacturing cost of wind power cables is also one of the important factors hindering the development of wind power generation in my country.

Utility model content:

The utility model aims at the problems existing in the above-mentioned existing cables for wind power generation, and provides a cable with low manufacturing cost, anti-ultraviolet radiation and strong environmental resistance.

In order to achieve the above object, the technical scheme adopted by the utility model:

The wind power generation cable is composed of a cable core, a filling layer, a tape, an inner sheath, armor and an outer sheath; The insulating layer outside the conductor, the gap between the insulated wire cores is filled by the filling layer; the outer surface of the insulating wire core and the filling layer is covered with a halogen-free flame-retardant tape; the outer surface of the tape is extruded One layer of inner sheath, the inner sheath is covered with a layer of armor, and the outer surface of the armor is extruded with a layer of outer sheath.

The conductor adopts copper wire or tinned copper wire, and adopts the fifth type structure stipulated in GB3956 standard, so that the cable has good flexibility.

The insulating layer is made of cross-linked polyethylene insulating material, and the improved formula can effectively suppress the concentration of space charge and prolong the service life of the cable.

The filling layer is a halogen-free flame retardant oxygen barrier layer.

The armor is braided by metal wire, which has high strength and good flexibility, which ensures the tensile performance and flexibility of the cable.

The sheath is made of high-strength polymer, and a wide-screening agent is added to effectively inhibit the damage of ultraviolet rays to the cable sheath, so that the cable has the characteristics of wear resistance and environmental stress cracking resistance.

The utility model obtained according to the above technical proposal has a reasonable and simple structure, easy manufacture, low cost and no pollution. The cable has strong flexibility, elasticity, recoverability, tensile resistance, and can effectively inhibit ultraviolet rays; the cable structure is compact, round, safe to use, and can fully meet the performance requirements of today's wind energy cables. This product is dedicated to domestic and foreign wind power It has good environmental and economic benefits.

Description of drawings:

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the structural representation of the utility model.

Detailed ways:

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

For cables used in wind power generation, due to the special environment, the cables generally need to meet the following technical requirements:

(1) In order to reduce the investment brought by power transformation, 20kV DC generators are usually used for wind power generation, which requires 20kV DC cables for the generator winding wires.

(2) The cables used for transmission lines are also high-voltage DC cables.

(3) Considering the place where the wind power generation cable is used, the cable should have the characteristics of UV resistance, good flexibility, and superior environmental resistance.

In order to achieve the above-mentioned technical requirements, the utility model has adopted the structure as shown in Figure 1:

The cable is composed of a cable core, a filling layer, a tape, an inner sheath, armor and an outer sheath; The outer insulating layer 2 is composed of the outer insulating layer 2. The conductor 1 is made of copper wire or tinned copper wire, and adopts the fifth type structure stipulated in the GB3956 standard, so that the cable has good flexibility. The insulating layer 2 is made of cross-linked polyethylene insulating material. The improved formula effectively suppresses the concentration of space charge and prolongs the service life of the cable.

The gaps between the insulated wire cores are filled by the halogen-free flame-retardant oxygen barrier layer 5 .

The outer surface of the insulated wire core and the halogen-free flame-retardant oxygen barrier layer 5 is covered with a halogen-free flame-retardant tape 3, and a layer of inner sheath 4 is extruded on the outer surface of the tape 3, and the outer surface of the inner sheath A layer of armor 6 is covered, and a layer of outer sheath 7 is extruded on the outer surface of the armor; in this structure, the armor is braided by steel wire, which has high strength and good flexibility, ensuring the tensile performance of the cable and soft performance; the inner and outer sheaths are made of high-strength polymers, and a wide shielding agent is added to effectively inhibit the damage of ultraviolet rays to the cable sheath, so that the cable has the characteristics of wear resistance and environmental stress cracking resistance.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (6)

1. The wind power generation cable is composed of a cable core, a filling layer, a tape, an inner sheath, armor and an outer sheath; it is characterized in that the cable core is twisted by two insulated wire cores, and the insulated wire core It is composed of a conductor and an insulating layer extruded outside the conductor. The gap between the insulated wire cores is filled by the filling layer; the outer surface of the insulating wire core and the filling layer is covered with a halogen-free flame-retardant tape; A layer of inner sheath is extruded on the outer surface of the belt, and a layer of armor is covered outside the inner sheath, and an outer sheath is extruded on the outer surface of the armor. 2. The wind power generation cable according to claim 1, wherein the conductor is copper wire or tinned copper wire, and adopts the fifth type structure specified in GB3956 standard. 3. The wind power generation cable according to claim 1, wherein the insulating layer is made of cross-linked polyethylene insulating material capable of effectively suppressing space charge concentration. 4. The wind power generation cable according to claim 1, characterized in that the filling layer is a halogen-free flame retardant oxygen barrier layer. 5. The wind power generation cable according to claim 1, wherein the armor is braided by metal wires. 6. The wind power generation cable according to claim 1, wherein the sheath is made of high-strength polymer added with a wide shielding agent.