Experiment system for simulating cable burning under fire environment and method thereof

Abstract

The invention discloses an experiment system for simulating cable burning under the fire environment and a method thereof. The experiment system for simulating cable burning under the fire environment comprises a weighing device which is provided with a sample frame used for fixing cable samples; a heating device which comprises a radiation heating shell and an igniter, wherein the radiation heating shell covers the weighing device, and the igniter is arranged in the cavity of the radiation heating shell and used for igniting the cable samples fixed on the sample frame; multiple thermocouples and heat flow meters; and a smoke collection device which comprises a smoke collection hood and a smoke composition analyzer, wherein the smoke collection hood is connected with the radiation heating shell of the heating device, and smoke emitted by burning of the cable samples is guided to the smoke composition analyzer through the smoke collection hood. According to the experiment system for simulating cable burning under fire environment and the method thereof, more accurate nature determination and classification of the burning characteristics of the cables are facilitated so that deeper research and analysis can be performed in the aspect of cable fire dynamics.

Description

technical field [0001] The invention relates to the technical field of cable sample detection, in particular to an experimental system and method for simulating cable burning in a fire environment. Background technique [0002] Cables are widely used in all walks of life in our country and in many fields of national life, providing an important guarantee for the country's industrial and economic development. The cable is usually composed of a sheath layer, a filling layer, an insulating layer, a wire core, etc., and the filling layer and the insulating layer are generally processed from high-molecular polymer materials, which have certain flammability and strong toxicity. Some of the insulating layers are thermoplastic materials. When it is heated or burnt, it will appear the coupled fire spread behavior of molten dripping and flowing burning, which not only increases the risk of fire, but also causes more serious damage to the safety of people's lives and properties. Dange...

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Problems solved by technology

However, this method also has certain limitations. For example, it is only suitable for carrying out the fire spread experiment in the form of flowing upward, and it cannot simulate the real fire environment, that is, it cannot simulate the process of the cable burning and spreading under the action of external radiant heat. Therefore, The qualitative and classification of cable combustion characteristics is not accurate enough, and the research and analysis of cable fire dynamics is not deep enough.

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