TONGUED-AND-GROOVED PLUG WITH BUILT-IN PRESSURE EQUALIZING DEVICE Russian patent published in 2019 - IPC B65D39/08 B65D51/16 F16K17/19 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to tongued-and-grooved plug (10) with a built-in pressure equalization device for installation in a liquid reservoir cover, containing under recess (12) of a plug valve body (15) equipped with air passage holes (39, 40), with seat journal (16) located in the middle of the body of the valve to accommodate membrane bushing (18) of membrane valve (17) on it, which radially external annular edge (19) adjoins annular flange (20) of the valve body, wherein the membrane bushing is located between bottom (14) of the plug recess and bushing (22) of compensating cover (21) located on the landing trunk and provided with air passage holes (36), wherein compensatory disc (32) is provided between compensatory cover and valve membrane, wherein compensator disc is connected to compensator cover, wherein the compensating cover for attachment in the valve body comprises fastening disc (26), which is located in the axial direction at a distance a from the compensator disc and has an external attachment edge to form a gripping connection with the attachment slot located on inner side (29) of wall (30) of the valve body.

EFFECT: disclosed is a tongued-and-grooved plug with a built-in pressure equalizing device.

6 cl, 3 dwg