DECEMBER 2022 | NEWS
CRANE REFURBISHMENT ADDS ENERGY-SAVING TECH
by Helmut Kempkes GmbH, which manufactures cranes and electric wire rope hoists under the Kuli brand. Two new hoists were installed in each
T
crane system, the lifting speeds of which have increased from up to 12.5m/min at nominal load to – thanks to the addition of frequency inverters – up to 22m/min, although that is when operating with
wo cranes at German reinforced steel manufacturer Breuer Stahlhandel have been given a state-of-the-art refurbishment
partial loads. All speeds are stepless due to the frequency control, whereas before the upgrade only pole-changing two- step lifting and travelling was possible. In addition, components such as the
wheel bogies with crane travel drives, trolley travel drives, conductor line, radio control system with transmitter and master control, back-up cable control system and the crane control system have been upgraded. They are also equipped with a Kuli remote maintenance solution, which
establishes an internet connection with the crane’s control system to, for example, change the settings of the inverters to adjust speeds or to reduce load oscillation. It is also possible to detect various causes of malfunctions, such as motor overloads, or defects such as ground insulation on power lines. Further technology includes the
cranes’ ability to reduce energy consumption by recovering energy from the braking system and feeding it back into the power grid. Speaking at the time of the launch
of the technology, Oliver Riese, export manager at Kuli, said: “We are using the nascent energy during the brake application… and leading it back to the grid instead of wasting it as heat. Kuli claims the system can cut energy consumption by up to 60%. The cranes date back to 1995. Each has a span of some 18m and two cantilevered trolleys, each with a capacity of 3.2t and total load capacity of 6.3t. ●
UK CEMENT FACILITY ACQUIRES NEW ELECTRIC-POWERED WIRE-ROPE UNIT
wire-rope unit at a cement production facility in the UK. Hoist & Winch cut down the existing
H
unit, which weighed 3t and had a 60m lifting height, in sections using gas- burning equipment because many of the hoist parts had seized up and were not easy to dismantle in the conventional way. The company removed the sections to a specially constructed scaffold work platform located below the hoist installation area. Each piece was then lowered to the nearest adjacent floor level 16m below using manual chain blocks, for transportation to the goods lift access located at that level. To carry out the task of installing the
new 10t SWL electric-powered wire-rope hoist, which weighs 2.2t, the company installed a temporary 3t SWL motor
20 | December 2022 |
www.hoistmagazine.com
oist & Winch has replaced an obsolete, 10t safe working load (SWL), electric-powered wire-rope hoist with a new
trolley-mounted, air-powered chain hoist unit on the monorail beam, raising the new hoist unit the required 60m from the outdoor ground-floor work area, and transporting it into the building over the temporary scaffold work platform. To facilitate lifting the new wire-rope hoist unit into its final position, Hoist & Winch deployed four 1t SWL manual chain blocks suspended from each end of two specially fabricated lifting frames clipped into position on the top flange of the monorail beam. The final tasks included electrical commissioning, assembling the hoist on to the monorail beam and the removal of all temporary lifting equipment. Hoist & Winch then performed dynamic load testing of the new wire-rope hoist unit and the monorail beam using a skid-mounted, certified 10t test load prior to issue with a LOLER Thorough Examination report. As part of the dynamic load testing procedure,
the outdoor cantilever section of the monorail beam was deflection-tested in accordance with BS2853 using a special, long-range, outdoor-operation Leica laser mounted to an adjustable tripod. The installation of the new hoist
was required ahead of the cement production facility carrying out extensive modification work to its pre-heater tower. The tower is 100m high and the old hoist unit was located at the 60m level on a monorail beam that cantilevers out of the building for approximately 8m. ●
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81
