Structure of the Device and Experimental Research of Verifying the Functionality of Elements of Easy-Dropped Construction

Abstract

This article analyzes the current state of explosion protection in the world. As a result of the analysis, it was determined that the main modern method of explosion protection is the use of easy-dropped construction (hereinafter - EDC). There are various methods for calculating the required area of the EDC, but to confirm the reliability of the calculations, the selection of the material that performs the function of the EDC, geometrical parameters and excess pressure of operation, it is necessary to conduct experimental research. The existing experimental devices for testing EDC for excess explosion pressure are given. The designs and drawbacks of these devices are considered. The design features of the constructed unit for checking the functionality of elements of easy-dropped construction (hereinafter referred to as the unit) and the main advantages compared to other experimental units are described. A scheme of the device and its structure is given. The required amount of propane-butane was calculated to obtain an excess explosion pressure of 5 kPa. Based on the results of the tests, a graph of the change in the excess pressure of the explosion over time is plotted and the value of the excess pressure of the explosion in a closed volume depending on the concentration of the gas mixture of propane-butane with air, which is formed in the closed volume, and the change in the excess pressure of the explosion after the activation of the EDC were investigated. A graph of the influence of the concentration of the gas-air mixture on the excess pressure acting on the EDC is plotted. The design parameters of the device and its location, the limit values of the excess pressure of the explosion, the minimum amount of gas to create the required excess pressure of the explosion are substantiated. The considered device provides an experimental determination of the values of the overpressure of the operation of EDC of typical sizes and allows conducting experimental research of the operation of the EDC under the influence of various values of the overpressure of the explosion with the required accuracy.