CN220873386U - Nylon insulating aluminum core square-pressed winding wire for dry type air reactor - Google Patents

Abstract

The utility model provides a nylon insulated aluminum core square winding wire for a dry type air-core reactor, which belongs to the technical field of dry type reactors and comprises a conductive wire core, wherein the conductive wire core comprises an aluminum conductor and a thin nylon insulating layer, the aluminum conductor adopts round aluminum wires for electrician conforming to GB/T3955, the nylon insulating layer is made of a modified nylon insulating material with the nominal thickness of 0.10-0.20mm by one-step extrusion, the nylon insulating layers and the aluminum conductor are in a tube extrusion mode, a square winding wire core with the length-width ratio of 1:0.9-1:0.7 is obtained by a stranding and profiling procedure, and an outer insulating layer and a protective layer are arranged outside the square winding wire core.

Description

Nylon insulating aluminum core square-pressed winding wire for dry type air reactor

Technical Field

The utility model mainly relates to the technical field of dry-type reactors, in particular to a nylon insulation aluminum core square-pressed winding wire for a dry-type air-core reactor.

Background

The reactor is also called an inductor, and is used as a high-voltage electric appliance for limiting short-circuit current, stabilizing voltage, reactive compensation, phase shifting and the like by an electric power system by using the inductance of the reactor, and the reactor can be divided into a hollow type, an iron core type, a dry type, an oil immersed type and the like according to structures and cooling mediums, and can also be divided into an inductive reactor and a capacitive reactor, when one conductor is electrified, a magnetic field is generated in a certain space occupied by the conductor, so that all current-carrying electric conductors have common inductances, however, the inductance of an electrified long straight conductor is smaller, the generated magnetic field is not strong, and therefore, the actual reactor is in a form of a solenoid wound by a wire, and is called an air core reactor.

The ultra-high voltage transmission technology is a world leading technical system of China after high-speed rail and nuclear power, and the reactor is used as one of core equipment of an ultra-high voltage transmission system, mainly plays roles of improving reactive compensation of a power grid, reducing power grid loss and improving transmission quality, and the ultra-high voltage line is required to be provided with a special dry reactor, wherein a key part of the special dry reactor is a winding wire, and a traditional material is a flat round aluminum wire.

The traditional reactor is formed by winding single-strand multiple wires in parallel, the coil diameter of the dry reactor is large, the required wire length reaches kilometers, in the winding after winding in parallel, the diameter difference of each adjacent inner side and outer side wire winding can reach the width of 2 wires, after winding a plurality of layers, the length and the resistance of each wire can be greatly different, eddy current can be generated in the wires in the operation process, and the large electric energy loss is caused, so that the energy is not beneficial to saving, and moreover, due to the limitation of impurities and defects existing in the wires, the common wire winding and the reactor can only be used on a 66kV power grid and are not suitable for the fields of ultra-high voltage and ultra-high voltage.

Disclosure of utility model

The technical scheme of the utility model aims at the technical problem that the prior art is too single, provides a solution which is obviously different from the prior art, and particularly mainly provides a nylon insulation aluminum core square winding wire for a dry type air-core reactor, which is used for solving the technical problems that the length and the resistance of each wire are greatly different after wrapping, vortex is generated in the wire in the operation process, and large electric energy loss is caused, so that the energy is not beneficial to saving.

The technical scheme adopted for solving the technical problems is as follows:

The utility model provides a nylon insulation aluminum core presses square winding wire for dry-type air-core, includes the conductive core, the conductive core includes aluminium conductor and one deck slim nylon insulating layer, the aluminium conductor adopts the electrician that accords with GB/T3955 to use round aluminium wire, nylon insulating layer is once only extrudees the modified nylon insulating material that one deck nominal thickness is between 0.10-0.20mm, and is extrusion tube formula, and a plurality of nylon insulating layer and aluminium conductor obtain the square winding core that the length-width ratio is listed as between 1:0.9-1:0.7 by the stranding die mould process, square winding core is provided with outer insulating layer and protective layer outward.

Furthermore, the resistivity of the aluminum conductor is less than or equal to 0.02806, the conductor adopts a round aluminum monofilament with high strength and lower resistivity, and the diameter and the number of the monofilament can be designed according to the resistance requirement required by a reactor winding and the size requirement after profiling.

Further, the material stretch ratio of the nylon insulating layer is 6-8, the thinnest point is more than or equal to 0.08mm, the extruded nylon insulating layer can be detected through power frequency 3kV spark after being cooled by water, and the modified nylon material meets the requirements of stranding and deformation in the subsequent working procedures, and the elongation coefficient is equal to that of an aluminum conductor.

Further, the outer insulating layer is an insulating strip reverse overlapping wrapping with the nominal thickness of 0.025-0.030mm and the density of 1.4g/cm, the overlapping covering rate of each layer of wrapping is not lower than 50%, the tearing elongation of the insulating strip in the outer insulating layer is between 130% and 180%, and the outer insulating layer is made of a light, environment-friendly and high-strength insulating material, so that the processing technological performance is ensured.

Furthermore, the protective layer is a composite protective strip with the nominal thickness of 0.10-0.18mm, and the strip of the protective layer is a halogen-free strip with environmental protection and excellent adhesion with epoxy resin.

Compared with the prior art, the utility model has the beneficial effects that:

The nylon insulating layer is formed by one-time extrusion of the modified nylon material, so that the mechanical property, the electrical insulating property and the tensile property of the nylon wire are improved, the bonding capability with epoxy resin is more outstanding, compared with a traditional winding wire structure, the flat (square) winding wire has the advantages that the winding size is reduced while the electrical property is ensured, the structure is more stable, the resistance difference is small, the eddy current loss is small, the energy is saved, and the like, and the nylon wire is suitable for a large-current dry type air-core reactor, and indirectly reduces the structural size of the reactor and reduces the cost.

The utility model will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic overall cross-sectional view of the present utility model;

Fig. 2 is a schematic cross-sectional view of a conductive core of the present utility model.

In the figure: 1. a conductive wire core; 11. an aluminum conductor; 12. a nylon insulating layer; 2. square winding wire core; 3. an outer insulating layer; 4. and (3) a protective layer.

Detailed Description

In order that the utility model may be more fully understood, a more particular description of the utility model will be rendered by reference to the appended drawings, in which several embodiments of the utility model are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this utility model belongs, and the knowledge of terms used in the description of this utility model herein for the purpose of describing particular embodiments is not intended to limit the utility model, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-2, a nylon insulation aluminum core square winding wire for a dry air-core reactor comprises a conductive wire core 1, wherein the conductive wire core 1 comprises an aluminum conductor 11 and a thin nylon insulation layer 12, the aluminum conductor 11 is an electrical round aluminum wire conforming to GB/T3955, the nylon insulation layer 12 is made of a modified nylon insulation material with a nominal thickness of 0.10-0.20mm, the nylon insulation layer 12 and the aluminum conductor 11 are extruded in a tube extrusion manner, square winding wire cores 2 with length-width ratio columns of 1:0.9-1:0.7 are obtained by a stranding and profiling procedure, the resistivity of the aluminum conductor 11 is less than or equal to 0.02806, the material stretch ratio of the nylon insulation layer 12 is 6-8, and an outer insulation layer 3 and a protection layer 4 are arranged outside the square winding wire cores 2.

The extrusion type insulating material with the special modification d1 is adopted through the structure, compared with the traditional wrapping type insulating material, the production efficiency can be improved while the electric insulating performance is ensured, the outer diameter of the whole core wire is not increased, the energy saving and consumption reduction effects are achieved, in addition, the shaped flat aluminum winding wire is provided with the wrapping insulating layer, the AC6kV/1min withstand voltage test is performed, meanwhile, a high-strength composite strip is used as a protective layer, and the internal structure of the winding wire can be protected while the winding wire and the epoxy resin used by the reactor are tightly adhered.

Referring to fig. 2, the outer insulating layer 3 is an insulating tape with a nominal thickness of 0.025-0.030mm and a density of 1.4g/cm, the overlapping lap ratio of each layer is not lower than 50%, and the tearing elongation of the insulating tape in the outer insulating layer 3 is between 130% and 180%, so that the structural size of the square winding wire can be reduced while the electrical performance is ensured, the purpose of saving materials is achieved, and the protective layer 4 is a composite protective tape with a nominal thickness of 0.10-0.18mm, has excellent adhesion with epoxy resin used by a reactor, and reduces the structural size of the winding wire while protecting the inside of the square winding wire.

While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the embodiments described above, but is intended to be within the scope of the utility model, as long as such insubstantial modifications are made by the method concepts and technical solutions of the utility model, or the concepts and technical solutions of the utility model are applied directly to other occasions without any modifications.

Claims (5)

1. The utility model provides a nylon insulation aluminum core square winding wire that presses for dry-type air-core, includes conductive core (1), its characterized in that, conductive core (1) include aluminium conductor (11) and one deck slim nylon insulating layer (12), aluminium conductor (11) adopt to accord with GB/T3955's electrician and use round aluminium wire, nylon insulating layer (12) are once only extrude the modified nylon insulating material that one deck nominal thickness is between 0.10-0.20mm, and be extrusion tubular extrusion mode, a plurality of nylon insulating layer (12) and aluminium conductor (11) obtain square winding core (2) that the length-width ratio is listed as between 1:0.9-1:0.7 by the stranding die mould process, square winding core (2) are provided with outer insulating layer (3) and protective layer (4) outward.

2. The nylon insulated aluminum core square winding wire for a dry type air reactor according to claim 1, wherein the resistivity of the aluminum conductor (11) is not more than 0.02806.

3. Nylon insulated aluminum core square winding wire for dry air reactor according to claim 1, characterized in that the material stretch ratio of the nylon insulation layer (12) is 6-8.

4. Nylon insulated aluminum core square winding wire for dry air reactor according to claim 1, characterized in that the outer insulation layer (3) is an insulation strip with nominal thickness of 0.025-0.030mm and density of 1.4g/cm, the overlapping lap ratio of each layer is not lower than 50%, and the tearing elongation of the insulation strip in the outer insulation layer (3) is between 130% and 180%.

5. Nylon insulated aluminum core square winding wire for dry air reactor according to claim 1, characterized in that the protective layer (4) is a composite protective strip with nominal thickness of 0.10-0.18 mm.