{"id":6936,"date":"2020-05-25T15:06:33","date_gmt":"2020-05-25T15:06:33","guid":{"rendered":"http:\/\/www.condra.co.za\/?p=6936"},"modified":"2020-05-25T15:10:44","modified_gmt":"2020-05-25T15:10:44","slug":"explosion-proof-hoists-for-kusile-coal-conveyors","status":"publish","type":"post","link":"https:\/\/condra.co.za\/en\/explosion-proof-hoists-for-kusile-coal-conveyors\/","title":{"rendered":"EXPLOSION-PROOF HOISTS FOR KUSILE COAL CONVEYORS"},"content":{"rendered":"Condra has completed manufacture of eight explosion-proof, high-lift hoists \u2013 four of them articulated \u2013 for Tenova Bateman.\r\n\r\n\r\nAll are custom-built, two-speed machines that utilise the modularity of Condra\u2019s K\u2011Series to deliver performance capabilities precisely tailored to the individual requirements of each application.\r\n\r\n\r\n\r\nAfter commissioning at Kusile Power Station, the eight machines will carry out installation and maintenance work on coal conveyors. They will further boost Condra\u2019s already substantial presence at Kusile, where the majority of overhead cranes and hoists have been supplied by this company.\r\n\r\n\r\n\r\nLifting capacities, lifting speeds and lift heights vary greatly among the eight hoists.\r\n\r\n\r\n\r\nLoads of between one and seven tons will be managed by fixed lifting speeds ranging from 1,25 to 12 metres per minute, and by lift heights of between 10 metres and 41 metres.\r\n\r\n\r\n\r\nNoteworthy among the machine features is the articulation on four of them, allowing travel around curves away from the line of conveyor movement. Also unusual are the higher than normal lift heights on six of the units: 17 metres (two machines), 18.5, 21, 32, and 41 metres.\r\n\r\n\r\n\r\nA Condra spokesman explained that even the 10 and 11,5-metre lift heights of the remaining two hoists can be looked upon as high-lift.\r\n\r\n\r\n\r\n\u201cHoists with this sort of lift height are not off-the-shelf deliveries for most crane companies, but we can offer and deliver a high-lift capability quite quickly because of the modularity of the K-Series,\u201d he said.\r\n\r\n\r\n\r\n\u201cWe can adapt the K-Series to an extremely wide range of requirements.\u201d\r\n\r\n\r\n\r\nCondra is generally acknowledged as sub-Saharan Africa\u2019s leader in high-lift cranes and hoists, a reputation which probably worked in favour of securing the Tenova Bateman order. Local manufacture would also have been a factor; there is increasing awareness that local sourcing will be one of the anchors upon which economic recovery in South Africa will rely.\r\n\r\n\r\n\r\nThe company\u2019s solid reputation in high-lift applications rests largely on the durability and reliability of its K-Series hoist range.\r\n\r\n\r\n\r\nManufactured since 1972 and installed worldwide under a wide variety of operating conditions, the K-Series has proved particularly dependable under the conditions of increased mechanical strain associated with high lift.\r\n\r\n\r\n\r\nThe installed base includes lift heights as high as 150 metres.\r\n\r\n\r\n\r\nThe K-Series is produced in three configurations: foot-mounted, monorail and double-rail crab. Lifting and reeving arrangements include centre-lift.\r\n\r\n\r\nFully covered hoists provide lifting capacities to 32 tons, while open-drum units have capacities in excess of 250 tons.\r\n\r\n\r\n\r\nFeatures on all models include electromagnetic DC disc brakes, standard frame-size motors with parallel rotors, double-acting limit switches, solid bronze rope guides and totally enclosed splash-lubricated gearboxes.\r\n\r\n\r\n\r\nCondra uses silumin rotor cores to enhance K-Series motor-starting torque in the high-lift role, and offers optional variable speed control on the drives to enable precise load positioning even on lifts of 100 metres and more.\r\n\r\n\r\n\r\nThe modular design of the K-Series allows rapid modification to specific high-lift application requirements (including lift speeds as quick as 1 metre per second \u2013 fifteen times faster than the 4 metres per minute found in many standard applications), resulting in delivery times that are usually the shortest available.\r\n\r\n\r\n\r\nStandard hoist speeds go up to 18 metres per minute.\r\n\r\n\r\n\r\nAfter delivery, the hoists for Tenova Bateman will be installed in the coal silos and at various maintenance stations along Kusile\u2019s conveyor route, where they will help with the installation, removal and maintenance of motors, gearboxes, rollers, pulleys and the conveyors themselves.\r\n\r\n\r\n\r\nAll have been flame-proofed to IP65 standard, and explosion-proofed to Class II Zone 21 specification, countering the combustible nature of coal dust which can explode if sparked. Among other things, the proofing involved fitting special gland seals between the motors and the hoists themselves, and sealing all covers and panels.\r\n\r\n\r\n\r\nArticulated crawls have been fitted with modified cross-heads and assemblies that allow them to negotiate bends in the supporting I\u2011beams, which follow curved routes to take the hoists and their loads away from the conveyor line. Brass bushes on the articulation prevent any possibility of sparking.\r\n\r\n\r\n\r\nDuring manufacture, all welds were inspected at every stage, and all eight machines were completed with a special anti-corrosive paint specification.\r\n
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Typical Condra K-Series articulated hoist under test<\/p><\/div>","protected":false},"excerpt":{"rendered":"Condra has completed manufacture of eight explosion-proof, high-lift hoists \u2013 four of them articulated \u2013 for Tenova Bateman. All are custom-built, two-speed machines that utilise the modularity of Condra\u2019s K\u2011Series to deliver performance capabilities precisely tailored to the individual requirements…","protected":false},"author":4,"featured_media":6945,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-6936","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","entry","has-media"],"_links":{"self":[{"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/posts\/6936","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/comments?post=6936"}],"version-history":[{"count":3,"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/posts\/6936\/revisions"}],"predecessor-version":[{"id":6944,"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/posts\/6936\/revisions\/6944"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/media\/6945"}],"wp:attachment":[{"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/media?parent=6936"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/categories?post=6936"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/condra.co.za\/en\/wp-json\/wp\/v2\/tags?post=6936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}