DEVICE FOR DRAINAGE OF OIL PRODUCT RESIDUE FROM STORAGE TANKS Russian patent published in 2003 - IPC

FIELD: devices for drainage of oil product residue from vertical and horizontal storage tanks; applicable at fuel depots. SUBSTANCE: device additionally has rigid frame 1, circular filtering insert 4 and disc 3 rigidly connected with float 2 and located above float 2 in a spaced relation to it. Circular filtering insert 4 is secured to disc perimeter. Disc 3 is connected with frame 1 for vertical motion inside it, and made with suction branch pipe 5 which is connected to small length of flexible hose 6. Located on disc 3 are plates 7 for regulation of buoyancy of float 2. EFFECT: higher operating reliability of device due to excluded contamination of suction branch pipe 5 with mechanical impurities, excluded influence of entire height of flexible hose 6 on depth of immersion of float 2 and mixing of oil product with water in the course of oil product drainage. 2 cl, 3 dwg