SHUT-OFF DEVICE FOR PRESSURE RESERVOIR Russian patent published in 1994 - IPC

FIELD: pressure reservoirs. SUBSTANCE: pressure reservoir has flange, cover fitted on it and devices for locking the cover in the closed position. Cover is shifted from the open position to the closed position through rotating the flange about center axis. Devices for locking the cover include sealing member and part projecting inside the flange which is provided with sealing fin and retainer members. Made on inner surface of flange are retainer recesses which are engageable with retainer members. Sealing fin adjoins the inner side of the flange at prestress. Space between flange and flange portion of sealing member is brought in communication with atmosphere. Cover is provided with recesses. Round main part of sealing member is provided with one or several retainer projections. Projections are engaged with recesses on the cover. Diameter of main part is less than that of flange of pressure reservoir. Cover is provided with peripheral groove which is engaged with retainer projections. Sizes and location of the recesses in the cover correspeond to those of retainer projections of the main part of sealing member. Flange portion of sealing member is made in form of lateral surface of cylinder whose one end is rigidly secured with main part of sealing member and its other end is provided with circular sealing fin. This end is taper in form and reduces towards free end of flange portion. Retainer member consists of many fins distributed over periphery and parallel to center axis of flange on outer surface of flange portion; retainer recesses consist of grooves running in parallel with axis and made on inner peripheral surface of flange. Width of grooves exceeds width of fins. Fins and grooves are evenly distributed over circumference. Number of grooves is equal to integral multiple of number of fins of the flange portion. In area where flange portion comes to main part there is a circular notch. Section made radially inside the flange portion on the main part is pot-shaped form. Base of this part is located approximately at height of lower edge of flange portion. EFFECT: enhanced reliability. 15 cl, 6 dwg