CN204423990U - A kind of aluminium alloy core lock armo novel photoelectric composite medium-pressure power cable - Google Patents

Abstract

The utility model discloses a novel photoelectric composite medium-voltage power cable with an aluminum alloy core interlocking armor. The metal shielding layers of the insulated cables are in contact with each other, and the conductive core includes multiple groups of aluminum alloy conductors twisted by multiple aluminum alloy wires; the optical unit includes a central reinforcement and multiple loose tubes, and each loose tube is equipped with There is an optical fiber, a sheath is placed outside the loose tube, a non-metallic reinforcement layer is set between the sheath and the loose tube, and the gap in the loose tube is filled with a thixotropic filler; the outer cladding includes Cable tape, inner sheath, steel tape armor and outer sheath with polypropylene filler in the voids inside the cable tape. The utility model has the advantages of light weight, convenient laying, low cost, stable price, etc., and overcomes the defects of high cost of copper, fluctuations in price, low mechanical properties of aluminum, and unstable connection.

Description

A new type of photoelectric composite medium voltage power cable with aluminum alloy core interlocking armor

technical field

The utility model relates to the technical field of power cables, in particular to a novel photoelectric composite medium-voltage power cable with an aluminum alloy core interlocking armor.

Background technique

In foreign developed countries, aluminum alloy conductors have been researched and applied in the wire and cable industry for more than 90 years, and major technological progress and wide application have been achieved, but it was after the 1960s and 1970s. Since the 1960s, power cables with aluminum alloy conductors (represented by AA8030 and AA8176) have been used in North America, mainly for low-voltage power distribution systems in buildings. Prove that the product is safe and reliable. In my country, aluminum alloy cables have been developed in recent years.

my country's electrical industry has entered the mid-1990s, and the promotion of copper core cables has the potential to monopolize the market. However, the supply of copper concentrates in my country is less than 30%, and more than 70% of them need to rely on imports. In addition, the global resource status of poor copper and rich aluminum , The copper price is currently more than three times the aluminum price, resulting in high construction electrical costs. However, at present, my country's proven reserves of bauxite are 3.7 billion tons. Under such advantages of aluminum mineral resources, with the development of science and technology, high-quality, high-tech aluminum materials have been developed. Copper" is bound to be a natural choice.

Contents of the invention

The technical problem to be solved by the utility model is to provide a new type photoelectric composite medium voltage power cable with aluminum alloy core interlocking armor and simple structure and low cost.

In order to solve the above technical problems, the utility model includes an outer cladding, an optical unit and a plurality of insulated cables wrapped in the outer cladding, wherein:

The outer cladding includes a cable tape, an inner sheath, an aluminum alloy tape interlocking armor layer and an outer sheath from the inside to the outside, and polypropylene fillers are filled in the voids in the cable tape;

The optical unit is a layer-stranded optical fiber, including a central strength member and a plurality of loose tubes twisted around the center strength member, each loose tube is provided with at least one optical fiber, and the outer tube of the loose tube is There is also a sheath, a non-metallic strengthening layer is provided between the sheath and the loose tube, the optical fiber is a coated silica optical fiber, and the loose tube is made of thermoplastic material , and the gap in the loose tube is also filled with a thixotropic filler, the Young's modulus of the non-metallic reinforcing layer is not lower than 90Gpa, and the sheath is made of vinyl chloride;

The insulated cable includes a conductive core and a conductor shielding layer, a cross-linked polyethylene insulating layer, an insulating shielding layer and a metal shielding layer wrapped on the conductive core from the inside to the outside in sequence, and the metal shielding layers of adjacent insulated cables are connected to each other. contact, the conductive wire core includes multiple groups of aluminum alloy conductors, and each group of aluminum alloy conductors is formed by twisting multiple aluminum alloy wires.

The loose tube is made of polybutylene terephthalate.

The non-metal reinforcing layer is made of aramid fiber.

The aluminum alloy conductor is made of AA8030 aluminum alloy material.

The beneficial effects of the utility model are: the utility model aluminum alloy core interlocking armored new optical fiber composite medium-voltage power cable uses aluminum alloy as the conductive wire core, which has the advantages of light weight, convenient laying, low cost, stable price, etc. It eliminates the defects of high cost of copper, fluctuating prices, low mechanical properties of aluminum, and unstable connection; secondly, the use of aluminum alloy belt interlocking armor makes the cable have certain sealing, flame retardant, and water-resistant properties, and also improves the cable's performance. Mechanical pressure resistance and tensile performance; finally, the use of optical fiber composite can completely solve the problem of power grid informatization, and can fully meet the access needs of all information services in the whole society. It is an effective support for the country to realize the strategic deployment of "multi-network integration"; Repeated construction of various lines solves problems such as safety distance, preempting passages, crossing and crossing, etc., improves resource utilization and reduces production costs.

Description of drawings

Fig. 1 is a structural schematic diagram of a novel photoelectric composite medium-voltage power cable with an aluminum alloy core interlocking armor of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail:

Referring to Fig. 1, the aluminum alloy core interlocking armored novel photoelectric composite medium-voltage power cable of the present invention includes an outer cladding 1, an optical unit 2 and a plurality of insulated cables 3 wrapped in the outer cladding 1, wherein:

The outer cladding 1 includes a cable tape 11, an inner sheath 12, an aluminum alloy tape interlocking armor layer 13 and an outer sheath 14 from the inside to the outside, and the voids in the cable tape 11 are filled with polypropylene filler object 15;

The optical unit 2 is a layer-stranded optical fiber, including a central strength member and a plurality of loose tubes 22 layered around the center strength member. Each loose tube 22 is provided with at least one optical fiber 21, so The loose tube 22 is also covered with a sheath 24, a non-metallic reinforcement layer 23 is provided between the sheath 24 and the loose tube 22, and the optical fiber 21 is a coated silica optical fiber. , the loose tube 22 is made of thermoplastic material, and the gap in the loose tube 22 is also filled with a thixotropic filler, and the Young's modulus of the non-metallic reinforcing layer 23 is not lower than 90Gpa, The sheath 24 is made of vinyl chloride;

The insulated cable 3 includes a conductive core 31 and a conductor shielding layer 32, a cross-linked polyethylene insulating layer 33, an insulating shielding layer 34 and a metal shielding layer 35 wrapped on the conductive core 31 from the inside to the outside in sequence, adjacent to each other. The metal shielding layers 35 of the insulated cable 3 are in contact with each other. The conductive core 31 includes multiple groups of aluminum alloy conductors, and each group of aluminum alloy conductors is formed by twisting multiple aluminum alloy wires.

The loose tube 22 is made of polybutylene terephthalate.

The non-metal reinforcing layer 23 is made of aramid fiber.

The aluminum alloy conductor is made of AA8030 aluminum alloy material, which has the advantages of light weight, low cost, stable price, and good sealing performance, and overcomes the defects of high copper cost, fluctuating prices, low mechanical properties of aluminum, and unstable connection.

Wherein, the central reinforcement member in the light unit 2 is not shown in the figure, and the part of the light unit 2 shown in FIG. 1 is a schematic diagram of the part involved in a loose tube 22; 4 in FIG. 1 is a tearing rope.

The manufacturing process of the utility model includes a conductor process, an insulation process, an optical unit process, a cable forming process, an interlocking armoring process, and an external protection process. Specifically:

1. Conductor process: Arrange a plurality of aluminum alloy wires of the same diameter in a regular twisting manner, and use a circular compression mold to form a compact circular aluminum alloy conductor.

2. Insulation process: The insulation process adopts Nokia-Maillefer three-layer co-extrusion cross-linking extrusion equipment, the shielding layer adopts non-peelable semi-conductive shielding material, and the insulation is cross-linked polyethylene insulating material to ensure that each layer is tightly combined. , the thickness refers to the provisions of the GB/T12706-2008 standard. Make sure that the surface of each layer is smooth and free from obvious ridges, sharp corners, grains and scorch marks.

3. Optical unit process:

3.1 Optical fiber

The optical fibers preferably consist of similar coated silica optical fibers. The same batch of products should use optical fibers manufactured with the same design, the same material and the same process;

The number of fiber cores in the optical unit should be 6, 12, 18 or 24 cores, or other core numbers required by the user;

3.2 Loose tube

The coated optical fiber in the optical unit should be placed in the loose tube 22 made of thermoplastic material, and the excess length of the optical fiber in the loose tube 22 should be uniform and stable. The material of the loose tube 22 can be polybutylene terephthalate (abbreviated as PBT) plastic or other suitable plastics;

The gap in the loose tube 22 should be continuously filled with a thixotropic compound, and the filler should not damage the transmission characteristics and service life of the optical fiber;

The optical cable should contain enough non-metallic strengthening layer 23 to increase the tensile performance of the optical cable. The cable stipulates that the non-metallic reinforcing layer is aramid fiber, and its Young's modulus should not be lower than 90Gpa;

3.3 twist layer

The stranded layer shall be made of loose-buffered optical fibers with the same outer diameter and stranded around the central strength member at an appropriate pitch. Layer stranding can be helical stranding or SZ stranding;

3.4 Optical unit outer sheath

The outer sheath of the optical unit is made of polyethylene or polyvinyl chloride sheath material to ensure the stability of optical fiber performance during processing;

4. Cabling process: It is formed by twisting three shielded cores and optical units. The optical unit should be located on the side of the three shielded cores (not in the center). The metal layers of each insulated core should be in contact with each other and filled to ensure Cable core roundness. The filling rope is used to fill the gap in the non-metal layer stranded optical unit structure, and its outer diameter should make the cable core round; the filling rope should be a round plastic rope, and its surface should be round and smooth. Water-blocking yarn can also be used as filling rope.

5. Armoring process: use a layer of aluminum alloy tape with a thickness of 0.6mm to cover the outer surface of the cable core with interlocking processing technology, and the armoring direction is right.

6. Outer protection process: the outer sheath 14 is made of thermoplastic polyvinyl chloride, and the sheath material should meet the requirements of ST2 type in GB/T12706.3; the eccentricity of the outer sheath is controlled within 25%.

In summary, the content of the present utility model is not limited to the above-mentioned embodiments, and those skilled in the art can propose other embodiments within the technical guidance of the present utility model, but these embodiments are all included in this disclosure. within the scope of utility models.

Claims (4)

1. an aluminium alloy core lock armo novel photoelectric composite medium-pressure power cable, it is characterized in that: comprise surrounding layer (1) and the light unit (2) that is wrapped in described surrounding layer (1) and many insulated cables (3), wherein:

Described surrounding layer (1) comprises tape for cables (11), inner sheath (12), aluminum alloy strip lock armo layer (13) and oversheath (14) from inside to outside, is filled with polypropylene filler (15) in the space in described tape for cables (11);

Described smooth unit (2) is stranded optical fiber, comprise central reinforce member and layer strand at the many Loose tube (22) of described central reinforce member surrounding, at least one optical fiber (21) is equipped with in every root Loose tube (22), described Loose tube (22) is also arranged with sheath (24) outward, non-metal reinforced layer (23) is provided with between described sheath (24) and described Loose tube (22), described optical fiber (21) is for there being the silica optical fiber of coat, described Loose tube (22) is made up of thermoplastic, and the gap in described Loose tube (22) is also filled with thixotropic filler, the Young's modulus of described non-metal reinforced layer (23) is not less than 90Gpa, described sheath (24) is made up of ethlyene dichloride,

Described insulated cable (3) comprises conductor wire core (31) and is wrapped in the conductor shield (32) on described conductor wire core (31), crosslinked polyetylene insulated layer (33), insulation screen (34) and metal screen layer (35) from inside to outside successively, the metal screen layer (35) of adjacent insulated cable (3) contacts with each other, described conductor wire core (31) comprises many group aluminum alloys conductor, and every group aluminum alloy conductor forms by many aluminum-alloy wires are stranded.

2., according to aluminium alloy core lock armo novel photoelectric composite medium-pressure power cable according to claim 1, it is characterized in that: described Loose tube (22) is made up of polybutylene terephthalate (PBT).

3., according to aluminium alloy core lock armo novel photoelectric composite medium-pressure power cable according to claim 1, it is characterized in that: described non-metal reinforced layer (23) is made up of aramid fiber yarn.

4. according to aluminium alloy core lock armo novel photoelectric composite medium-pressure power cable according to claim 1, it is characterized in that: described aluminium alloy conductor adopts AA8030 type aluminum alloy materials to make.