| 摘要 |
PCT No. PCT/EP86/00117 Sec. 371 Date Nov. 21, 1986 Sec. 102(e) Date Nov. 21, 1986 PCT Filed Mar. 6, 1986 PCT Pub. No. WO86/06822 PCT Pub. Date Nov. 20, 1986.An apparatus (8) is provided for retrieving spherically shaped cleansing bodies circulated through the cooling system of a tubular heat exchanger. It has a cylindrical housing (11) into which feed and discharge tubes (6,9) and associated extensions (14,15) reach. To achieve simplified operation, valve plates (20,21) are mounted on a central shaft (18) to form a seal flush against the angularly inclined ends of pipe extensions (14,15) by appropriately rotating shaft (18). Further a sieve plate (24) is fixedly mounted in housing (11) perpendicular to shaft (18). Shaft (18) may be rotated through 180 DEG and has three operative settings. In a first, control setting extensions (14,15) and cutout (25) are closed, in a second, flow-through setting all three are open, and in a third, retrieval setting extensions (14,15) remain open while cutout opening (25) is closed. |
