CN201348887Y - Heat shrinkable polyester fiber grid coated transposed conductor - Google Patents

Abstract

The utility model relates to a heat shrinkable polyester fiber grid coated transposed conductor, in particular to a novel winding wire structure of a power transformer, and belongs to the technical field of coil winding wires. The transposed conductor is characterized that an acetal paint layer and an epoxy self-adhesive paint layer are sequentially coated on an oxygen-free copper sheet wire conductor, after solidification of the paint layers, the oxygen-free copper sheet wire conductor forms individual sheet wires, odd numbers of individual sheet wires are arranged into two rows, a whole bunch of core wires is formed after the transposition of individual sheet wires in turns, a polyester fiber mesh belt layer is enwound on the exterior of the whole bunch of core wires, a glass fiber rope belt is positioned on the side surface of the polyester fiber mesh belt layer, and a high-density paper layer is wrapped on the glass fiber rope belt. The utility model has a compact and reasonable structure, reduces the volume which occupies the volume of the transformer, and solves the defects that the transposed conductor can not meet the requirements of heat exchange and structural strength at the same time; experiments prove that, after using the heat shrinkable polyester fiber grid coated transposed conductor, the average temperature gradient is reduced by 1/4, the bending resistance is improved by more than 3 times, and the deformation degree is reduced when the transposed conductor bears short-circuit rush, by comparing with an ordinary winding wire of the power transformer.

Description

Thermal polycondensation ester fiber grid cladded type transposed conductor

Technical field

The utility model relates to a kind of thermal polycondensation ester fiber grid cladded type transposed conductor, and specifically a kind of novel power transformer winding wire structure belongs to coil windings line technology field.

Background technology

In prior art, transposed conductor generally adopts dual mode, a kind of insulating paper winding transposed conductor core that is to use, this structure is trapped in transformer oil between the winding wire easily, and insulating paper is wrapped to be heated yieldingly, hinders oil duct, causes heat exchanger effectiveness to reduce; Two are to use epoxy resin glass fiber rope band binding transposition core, though this structure has reasonable radiating efficiency, but because epoxy resin glass fiber rope band does not have heat-shrinkable, so there is the transposed conductor disadvantage that the regelate process is difficult to hold tightly behind coil molding, and because the binding area is limited, the mechanical strength of transposed conductor structure is not high.The transposed conductor of these two kinds of structures will be because of the high temperature that produced by short-circuit current rush and electromagnetic force in the transformer use and reduce useful life greatly.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned weak point, thereby a kind of thermal polycondensation ester fiber grid cladded type transposed conductor is provided, and can reduce the volume that takies transformer, mechanical strength can significantly promote, directly contact with transformer oil in transformer, oil duct is unimpeded, heat radiation stabilization efficiency height.

The technical scheme that provides according to the utility model, thermal polycondensation ester fiber grid cladded type transposed conductor comprises: oxygen-free copper lenticular wire conductor, feature is to apply acetal enamelled coating, the single lenticular wire of epoxy self-bonding enamelled coating curing back formation at oxygen-free copper lenticular wire conductor, be arranged in two row by the single lenticular wire of odd number root, all single lenticular wires are formed whole bunch core after replacing successively, polyester fiber guipure layer is wrapped in outside the whole bunch core, and the glass rope band is placed on polyester fiber guipure layer side, wrapped again high density ply of paper.

Compared with the prior art the utility model has the following advantages:

The utility model project organization compactness, reasonable has reduced the volume that takies transformer; The heat exchange of transposed conductor and the defective that structural strength can not satisfy have simultaneously been solved, through test, compare with the common winding of transformer, use the average temperature gradient of thermal polycondensation ester fiber grid cladded type transposed conductor to reduce by 1/4, bending strength improves more than 3 times, when bearing short-circuit impact, distortion greatly reduces.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:

Shown in Figure 1, comprising: oxygen-free copper lenticular wire conductor 1, acetal enamelled coating 2, epoxy self-bonding enamelled coating 3, polyester fiber guipure layer 4, glass rope band 5, high density ply of paper 6.

The utility model oxygen-free copper lenticular wire conductor 1 applies acetal enamelled coating 2 through enamel-cover equipment and apply epoxy self-bonding enamelled coating 3 again after solidifying, the single lenticular wire that forms after solidifying, be arranged in two row by the single lenticular wire of odd number root, to put in order the moulding of bunch core after in preset pitch, replacing once successively through transposer many single lenticular wires, use wrapped equipment that polyester fiber guipure layer 4 is twined, glass rope band 5 is placed on polyester fiber guipure layer 4 side, wrapped again high density ply of paper 6, through coil on after the pulling equipment compacting around thermal polycondensation ester fiber grid cladded type transposed conductor.

The utility model can be according to the transposition specification, the radical demand, adjust wrapping angle, use pyrocondensation polyester guipure closely to wrap up the transposition core, after 100 ℃～120 ℃ heating, the epoxy self-bonding enamelled coating hot melt of transposition line wicking surface penetrates into the polyester fiber grid, the polyester fiber guipure is radial contraction significantly, fill up the space of epoxy self-bonding paint hot melt infiltration, tightly twine solid transposition core, two combine, and the mechanical strength of transposed conductor significantly promotes, again because the obstruct of the insulating paper strip of no sealing, transposed conductor directly contacts with transformer oil in transformer, and oil duct is unimpeded, heat radiation stabilization efficiency height.Move, in the transportation when preventing to pollute, damage the glass rope band 5 that adds, high density ply of paper 6 in Transformer Winding, only need in the unwrapping wire process, tear an end glass rope band 5, high density ply of paper 6 removals that can protection usefulness.

Claims (1)

1, a kind of thermal polycondensation ester fiber grid cladded type transposed conductor, comprise oxygen-free copper lenticular wire conductor (1), it is characterized in that: on oxygen-free copper lenticular wire conductor (1), apply acetal enamelled coating (2), the single lenticular wire of epoxy self-bonding enamelled coating (3) curing back formation successively, be arranged in two row by the single lenticular wire of odd number root, through forming whole bunch core after the transposition successively, polyester fiber guipure layer (4) is wrapped in outside the whole bunch core, glass rope band (5) is placed on polyester fiber guipure layer (4) side, wrapped again high density ply of paper (6).