FIELD: mechanical engineering. SUBSTANCE: device has at least, one flexible sealing plate located in a space between first and second structure members and provided with first and second generatrix lines for contacting with the first and second members respectively, fastening corner whose first edge bear on the sealing plate and second edge is banded as a clamp and passes through a slot. The slot is provided in the second member to provide axial position of the sealing plate and to keep it in operative position of the sealing due to plate clamping between the corner and first and second members of the construction. EFFECT: enhanced reliability of the sealing. 5 cl, 5 dwg _
