FIRE- AND EXPLOSION-PROOF DOOR Russian patent published in 2018 - IPC E06B5/16 E06B5/12 E06B5/14 

FIELD: fire safety.

SUBSTANCE: fire and explosion protection door relates to protective structures that passively protect openings in building structures from the effects of open flames and explosion factors. Door includes a door leaf comprising outer and inner metal walls, a bearing member, stiffeners and a layer of fireproof material, and a door frame. Outer and inner metal walls of the door leaf are parts of a metal shell, consisting of a trough-shaped part made of a seamless metal plate and forming an inner wall and a metal sheet rigidly bound around the circumference with a trough-shaped portion and forming an outer wall. Bearing member is made in the form of a honeycomb panel, edged along the circumference by stiffeners and placed inside the metal shell. Cells are in the form of hexahedrons, their inner cavities are filled with fire-resistant thermocompensating material. Between the inner surfaces of the metal shell and the outer surfaces of the bearing member there is a layer of fire-resistant thermocompensating material. Door frame consists of an entrance part and a support part joined together. Entrance part is made of a metal closed profile with a section in the form of a rectangular trapezium, with an acute angle turned to the outside of the doorway. Support part is made of a rectangular metal tube. Inner cavities of both parts are filled with fire-resistant thermocompensating material.

EFFECT: fire and explosion-proof door made according to the present invention has higher fire resistance in combination with high explosion resistance, relatively low weight and price, high performance characteristics, while being reliable and high-tech.

7 cl, 6 dwg