Evaluating platform and evaluating method for fire smoke parameter of cable in multiple scenes

Abstract

The invention relates to an evaluating platform and an evaluating method for a fire smoke parameter of cable in multiple scenes. The evaluating platform comprises a cable duct well simulation chamber, a radiation heating device, a refractory ceramic plate, an analytical balance, an overload over-current simulating device, a temperature measuring device, a gas analyzing device, an optical smoke density measuring device, a data collecting system, an integrated control console, a frequency conversion fan and a smoke collecting pipeline, wherein a measuring end of the optical smoke density measuring device comprises a red light direct emitting, blue light direct emitting and scattering light source; a to-be-detected cable is arranged on the refractory ceramic plate and a power source is switched on, two thermocouples are arranged on the surface and interior of the to-be-detected cable, the balance, the optical smoke density measuring device and the gas analyzing device are debugged and analyzed, the air speed of the frequency conversion fan is selected, the overload, over-current and / or external heat source radiation firing scene is selected and the simulation test is started. According to the invention, various firing scenes can be simulated on a same platform and the compound research on the fire cable quality loss, temperature change, smoke component and smoke shading property of the cable can be performed.

Description

technical field [0001] The invention relates to a scientific research platform for cable fire smoke properties and detection technology, in particular to a multi-scenario cable fire smoke parameter evaluation platform and evaluation method. Background technique [0002] As the main medium of power transmission and information transmission, cables are widely used in various places. In order to facilitate management and maintenance, the centralized arrangement of cables has become a trend. A large number of ground power lines are "underground" and turned into cable trenches, and the volume and scale of cable shafts in buildings are also increasing. The number of fires in cable trenches (or cable wells) caused by various fire causes has increased sharply. Once a cable fire occurs, the fire will spread quickly and fiercely, and at the same time it will release a large amount of toxic gases such as smoke, hydrogen chloride, carbon monoxide and nitrogen oxides, which will not onl...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a multi-scenario cable fire smoke parameter evaluation platform and evaluation method to solve the problem that the three main fire scenarios of overload, overcurrent and external heat source radiation cannot be used in the existing cable smoke parameter evaluation. Simulation on the same platform and the impact of different flue gases on the accuracy of light source measurement, as well as the technical problem of not being able to evaluate the characteristic gas hydrogen chloride

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