Device for monitoring the tightness of sealing components

A device (4) for checking the tightness of a sealing component, such as a membrane (1) or a multilayer, for a fluid storage tank, wherein the checking device (4) comprises a box (5) comprising:

• a peripheral partition (7),
• a cover (6) made of a transparent material, the cover (6) being connected to the peripheral partition (7) such that the cover (6) and the peripheral partition (7) are able to define, with the sealing component (1), an inner chamber (13),
• the peripheral partition (7) comprising:
• an inner peripheral wall (9) having a bottom end equipped with an inner peripheral seal (11) intended to be positioned against the sealing component (1) all around the inner chamber (13);
• and
• an outer peripheral wall (10) positioned outside the inner peripheral wall (9) so as to define, between the outer peripheral wall (10) and the inner peripheral wall (9), an intermediate chamber (14) extending exclusively in the peripheral partition (7) all around the inner chamber (13), the outer peripheral wall having a bottom end equipped with an outer peripheral seal (12) intended to be positioned against the sealing component (1) all around the inner peripheral seal (11);
• a depressurizing device (17) which is connected to the inner chamber (13) and to the intermediate chamber (14) and is configured to depressurize said inner chamber (13) and said intermediate chamber (14),
• wherein the checking device (4) comprises an air evacuation pipe (15) which is connected, on one side, to a depressurizing member (18) of the depressurizing device (17) and, on the other side, to the intermediate chamber (14) so as to set the intermediate chamber (14) at a pressure P1 lower than atmospheric pressure,
• the inner peripheral wall (9) comprising a communication channel (20) fluidically connecting the inner chamber (13) and the intermediate chamber (14).