IMPROVED TRANSIT FOR CABLES AND PIPES

摘要

The invention concerns a lead-through transit for cables 3 or pipes of the kind having a frame 1 of the opening 2 is filled by a series of modular resilient lead-through blocks 4 and blank blocks 5 arranged in rows separated by stayplates 6 with a compression and packer assembly 7 clamping and holding the blocks 4,5 and cables 3 in sealed engagement. The lead-through blocks 4 comprise two complementary half-blocks 40 that provide, when assembled together around a cable, a passageway 41 for the cable. Each half-block 40 has a series of axially spaced semi-annular lands 42 separated by recesses 43. The lands 42 provide axially spaced sealing faces for engagement with the cable while the recesses 43 enable resilient deformation of the block to accommodate variations in cable size. To assist in such resilient conformation of the half-blocks 40, it is preferred that the half-block has recesses 44 formed on the outer faces that are aligned with the lands 42. Various arrangements of the lands 42 and recesses 43 or 44 in the resilient conformable lead-through blocks are described to provide the advantage of reducing the numbers of blocks required for service and installation requirements.