CN201417642Y - Flame-retardant insulating shielding tube-shaped bus - Google Patents

Abstract

The utility model provides a flame-retardant insulating shielding tube-shaped bus. The bus is characterized in that the bus body adopts a metal pipe; an insulating layer made of radiation crosslinkingsilicon rubber, a semi-conductive shielding layer, a metal shielding layer and a pyrocondensation sheathing layer are wrapped outside the bus body to form a composite layer-shaped structure. The radiation crosslinking silicon rubber self-adhesive tape is adopted to manufacture the insulating layer, thereby greatly reducing construction layers and workload, ensuring that no gap exists in the insulating layer, better solving the problem of partial discharge, and guaranteeing the long-term working at a temperature of subzero 60 DEG C to 250 DEG C; and the semi-conductive shielding layer is additionally arranged, which can be in better contact with the insulating layer to guarantee the shielding effect, thereby realizing normal use of the tube-shaped bus.

Description

A kind of fire retardant insulating shielding tubular bus

Technical field:

The utility model is that existing tubular bus insulating barrier and shielding construction are improved, and discloses a kind of fire retardant insulating shielding tubular bus, belongs to the cable processing technique field.

Background technology:

Quick, steady-state growth along with national economy, the develop rapidly of urban construction, enterprise, electricity consumption of resident linearly rise, cause continuing to increase of transforming plant main transformer capacity thus, the rated current of transformer low voltage outlet side also increases thereupon, and characteristics such as the insulation shielding tubular bus is big with ampacity, coefficient of safety height replace original rectangular bus bar.The insulating barrier of existing insulation shielding shape pipe bus mainly is manually to twine teflin tape, the multilayer polytetrafluoroethylarticles band produces the slit in the overlap joint winding process, the partial discharge performance of product is undesirable, for guaranteeing dielectric strength, increases teflin tape and twines thickness, can reach ten layers at most, volume is very big, owing to be therefore copper strips directly is wrapped on the pyrocondensation insulating sleeve as metal screen layer,, the shield effectiveness of product is bad, has influenced the normal use of tubular bus.

Summary of the invention:

Shortcomings such as the utility model provides a kind of fire retardant insulating shielding tubular bus, and it is big to have solved existing tubular bus volume, and shielding properties is bad.

Technical solution of the present utility model is as follows: be bus bulk with the metal tube, be coated with crosslinking with radiation silicone rubber insulation layer, semiconductive shielding layer, metal screen layer, pyrocondensation restrictive coating formation straticulate structure tubulose in proper order at its superficies.

Good effect of the present utility model is: because silicon rubber self-adhesive tape is four times of the polytetrafluoroethylene tape thickness, and silicon rubber self-adhesive tape twines could realize self bonding formation integral body within 24 hours, so the utility model adopts the crosslinking with radiation silicon rubber self-adhesive tape to do insulating barrier, the construction number of plies and workload have been significantly reduced, make and do not have the space in the insulating barrier, can fine solution partial discharge problem, simultaneously because silicon rubber is high temperature resistant, can be-60～250 ℃ of following long-term works; Having increased semiconductive shielding layer can guarantee shield effectiveness with fine contact of insulating barrier, has satisfied the normal use of tubular bus.

Description of drawings:

Fig. 1 is the utility model structure principle chart.

Embodiment

According to shown in Figure 1, bus bulk 1 of the present utility model is to be made by copper pipe or aluminum pipe or its alloying metal pipe, is coated with crosslinking with radiation silicon rubber self-adhesive tape insulating barrier 2, semiconductive shielding layer 3, copper strips metal screen layer 4, pyrocondensation restrictive coating 5 in proper order at its superficies and constitutes the straticulate structure tubuloses.

Claims (1)

1, a kind of fire retardant insulating shielding tubular bus, it is characterized in that: bus bulk (1) is a metal tube, is coated with insulating barrier (2), semiconductive shielding layer (3), metal screen layer (4), pyrocondensation restrictive coating (5) the formation straticulate structure tubulose that crosslinking with radiation silicon rubber is made in proper order at its superficies.

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