CALORIMETRIC INSTALLATION FOR INTEGRATED DETERMINATION OF FIRE HAZARD AND FIRE RESISTANCE OF BUILDING MATERIALS AND SELF-SUPPORTING AND NON-BEARING STRUCTURES BY LOSS OF INTEGRITY AND HEAT-INSULATING CAPACITY Russian patent published in 2025 - IPC G01N25/50 G01N25/22 

FIELD: fire-fighting equipment.

SUBSTANCE: invention relates to the field of fire safety, namely to creation of a calorimetric installation for complex determination of fire hazard and fire resistance of building materials and self-supporting and non-bearing structures. Proposed is a flow-through calorimetric installation operating on a thermocouple principle for the integrated determination of fire hazard from the dynamics of heat release, hazardous factors of fire and fire resistance from the integrity and heat-insulating capacity of building materials and self-supporting and non-bearing structures. Calorimetric installation consists of a thermal vacuum chamber and a cooling chamber, each with a lower and an upper part of a pyramidal shape, which are connected respectively to the air supply and exhaust ventilation systems. It contains a heat-insulating chamber for a vertically installed sample, which is moved into a thermal vacuum chamber along guides with the help of an adjustment mechanism. Calorimetric installation is equipped with a radiation panel, which enables to test samples under the effect of a heat flow of constant density in range of 0-110 kW/m², dynamic heating according to a given law of change in heat flow density, a standard fire temperature mode or alternative fire temperature modes; equipped with a system for determining the dynamics of heat release by thermocouple sensors; electronic scales; system for selection and analysis of decomposition and combustion products, oxygen concentration; photometric smoke detection system. Installation has a door for input and output from thermal vacuum chamber of heat-insulating chamber with sample; video surveillance window. Calorimetric installation is characterized by fixation of thermocouples in the centre of heated and non-heated surfaces during testing to determine the fire resistance limit upon reaching the limit state of loss of integrity and heat-insulating capacity due to achieving the critical temperature of the sample and component layers; comprises a unit for programming, collection of test results, a monitor.

EFFECT: improving efficiency, accuracy and reliability of determining a complex of indicators of fire hazard and fire resistance of building materials and self-supporting and non-bearing structures.

4 cl, 1 dwg