Fabric thermal protection performance evaluation device

Abstract

The invention relates to an evaluating device for thermal protective property of fabrics. The evaluating device comprises a steam generator, a steam conveying pipe, a thermal exposing simulating box, a sample conveying device and a data collecting system, wherein the front end of the steam conveying pipe is connected with the steam generator while the rear end is connected with a steam nozzle; a steam outlet end of the steam nozzle is arranged in the thermal exposing simulating box; a heater, a temperature sensor and a humidity sensor are mounted in the thermal exposing simulating box; an opening is formed in the rear side of the thermal exposing simulating box; the sample conveying device is connected with the rear side of the thermal exposing simulating box; a thermal insulating plate, a fabric clamping device, a static air layer device and a sensor base are backwards arranged in the sample conveying device in turn; an outer fabric, a waterproof breathable fabric and a thermal insulating fabric are arranged in the opening in the fabric clamping device; a simulated skin sensor is arranged in the sensor base; the simulated skin sensor, the temperature sensor and the humidity sensor are connected with the data collecting system. The evaluating device provided by the invention can be used for accurately evaluating the thermal protective property of fabrics under the conditions of high-temperature radiation and high-temperature steam.

Description

technical field [0001] The invention belongs to the technical field of occupational safety and health, in particular to a fabric thermal protection performance evaluation device. Background technique [0002] A research institution investigated the burn treatment records of firefighters from 2005 to 2009, and found that: high-temperature steam and high-temperature liquid water are the main factors (65%) that cause firefighters' burns, and burns caused by flames account for only 20%. As a protective clothing used in a fire environment, firefighting clothing can reduce or prevent skin burns and improve the efficiency of firefighting operations. However, in the past, most of the thermal protection tests of firefighting clothing focused on flame and radiation exposure, such as the TPP test under NFPA 1971 flash fire conditions, the RPP test under NFPA 1977 strong radiation conditions, and the SET test under ASTM F2731 low radiation conditions. The evaluation of thermal protecti...

AI Technical Summary

Problems solved by technology

However, the current fabric thermal protection performance evaluation device cannot evaluate the impact of external high-temperature steam on the thermal protection performance evaluation of the fabric system, and only using the method of fabric pre-wetting to simulate the distribution of moisture in the fabric system before heat exposure cannot be used to investigate high temperature. Effects of steam temperature, pressure, exposure time and other factors on the thermal protection performance of firefighting clothing

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