Insulated fireproof bus duct

Abstract

The invention discloses an insulated fireproof bus duct, which comprises a shell and a conductor, wherein the shell consists of a side plate and a cover plate which are connected with each other through a fastener to clamp the conductor; the inner wall of the shell is sprayed and coated with fireproof materials; the conductor is coated by a high temperature resistant reinforced mica tape and externally coated by an insulator heat shrinkage sleeve; an interphase and a terminal are provided with spacer blocks made of inorganic glass fiber reinforcing materials; and the side plate and the conductor are riveted and fixed on a joint through a butterfly spring. The insulated fireproof bus duct can be fireproof for a long time, and the conductor is coated by the high temperature resistance reinforced mica tape and externally coated by the insulator heat shrinkage sleeve; the spacer blocks are made by pressing the inorganic glass fiber reinforcing materials, so that the spacer blocks are noncombustible and inexplosive and have good mechanical property; the inner wall of the shell is sprayed and coated with the fireproof materials, so that the back-fire temperature is reduced or the fireproof time is prolonged; and the butterfly spring has the function of automatic regulation to make the pressure uniformly applied to the contact surface, so that the contact resistance and the temperature rise are reduced. Moreover, the insulated fireproof bus duct has large capacity, low line loss, high short-circuit strength and good heat dispersion.

Description

technical field [0001] The invention relates to a bus duct, in particular to a fire-resistant insulating bus duct. Background technique [0002] In modern enterprises, power transmission and distribution equipment used in high-rise buildings and other places requiring large currents generally use cables for power supply, which requires a large number of cables. like figure 1 As shown, for example, in a 20-story building, each floor needs to be laid out separately, and 20 cables need to be laid on the first floor, and the laying of a large number of cables is very troublesome. [0003] Recently, the busway system has replaced the power supply of cables. As long as a single busway is used, the power branch can be easily drawn out through the distribution box, and each floor can be supplied with power. The change and expansion of user lines are more convenient and flexible. . However, since the busway has no fire-resistant function, when the line is short-circuited or encoun...

AI Technical Summary

Problems solved by technology

However, since the busway has no fire-resistant function, when the line is short-circuited or encounters a fire, the fire resistance of the busway is very important because of the singleness of the busbar, which has a very important impact on the safe and stable use of electricity.

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