| 摘要 |
FIELD: blasting.SUBSTANCE: bench for selection of thickness of a fence designed for protection against fragments of explosive nature comprises an explosive chamber, in the upper base of which there is a hole covered with an element, the area of the hole may vary by screwing replaceable rings, the element closes the hole in the ring, above which the fence is fixed. The second hole is closed with a valve, which is pressed to the hole with the help of the electromagnet and is opened by a spring as contacts open. The force of pressing the valve and compression of the spring is set so that the total force is equal to the permissible pressure multiplied by the area of the valve opening. The closing element is made as imitating a fragment of an explosive nature, above which a model protective fence is installed. The surface of the closing element facing the model protective fence comprises a surface that models irregularities inherent to fragments of the explosive nature.EFFECT: increased efficiency of fence protection.1 dwg |
