Ceramic silicone rubber fireproof bus duct

Abstract

The invention discloses a ceramic silicone rubber fireproof bus duct. The bus duct comprises conductors arranged side by side, each conductor is wrapped in an insulating film coating and a ceramic silicone rubber coating successively, all the conductors are installed in an inner casing in a sealed manner, an outer casing is arranged outside the inner casing, and alumina silicate fibrofelt is filled between the inner casing and the outer casing. The bus duct can satisfy routine performance requirements for power transmission and distribution safety, insulation and heat insulation performance and fireproof performance are very high, structural design is ingenious and reasonable, it is ensured that the whole bus duct has sufficient insulation and machinery performance, the structure is compact, the size is small, the weight is low, the bus duct is suitable for onsite installation on different space occasions, manufacture and installation are very convenient, and the installation quality is ensured.

Description

technical field [0001] The invention relates to a fire-resistant bus duct, in particular to a ceramic silicon rubber fire-resistant bus duct. Background technique [0002] There are generally two types of refractory busway on the market: one of the structural forms, including multi-phase conductors and shells, uses muscovite tape as an insulating material to wrap each phase conductor, and then wraps the mica tape on the periphery of the multi-phase conductor. Mineral wool board is used for heat insulation, and then the outer shell is wrapped with steel plates to form an inner shell, and a thick fireproof cotton (aluminum silicate wool) is filled between the inner shell and the outer shell; another structural form is cast with epoxy resin The method is to cast the multi-phase conductor into a whole with a square cross-section, and then use iron nails to cover the fireproof board with a thickness of about 20mm on the periphery of the epoxy resin castable to achieve the purpose...

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Problems solved by technology

[0003] The fire-resistant busbar with the first structural form can indeed achieve better fire-resistant performance (generally 950°C-60-90min), but the overall shape is huge and heavy, and the on-site installation space is difficult to meet, often facing the dilemma of being unable to install, and During on-site installation, each joint must be temporarily filled with fireproof cotton, which not only makes it difficult to ensure the quality of the installation, but also seriously pollutes the on-site environment

[0004] The fire-resistant bus bar with the second structure is relatively small in shape, but because the inner epoxy resin material has a low melting point (about 140°C), it basically has no fire-resistant ability, and the internal temperature can still reach 200 °C due to the external 20mm thick fire-proof board. -300°C, the epoxy resin material will soften and lose its mechanical strength and insulation capacity. Generally, it cannot be powered on and run in less than half an hour in the flame, and it is difficult to meet the fire protection requirements; The joints must be poured on site, and the fireproof board must be temporarily wrapped, which is inconvenient to install

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