Abstract Details
| Name: Tarun Bangia Affiliation: ARIES, Nainital Conference ID: ASI2015_712 Title : Material Handling Systems for 3.6m Telescope Enclosure at Devasthal, Nainital. Authors and Co-Authors : Arun Ghanti *PPS,Pune Abstract Type : Poster Abstract Category : Instrumentation and Techniques Abstract : Aryabhatta Research Institute of Observational Sciences (ARIES), an autonomous institute under Department of Science and Technology (DST), is setting up a 3.6m optical telescope at Devasthal (29o21’ N, 79o41’ E, 2450 amsl), Nainital. AMOS, Belgium has designed, manufactured and supplied the 3.6m telescope components to ARIES. One of the challenges for ARIES was to build an enclosure consisting of 29m high steel building, with rotating cylindrical steel dome of 16.5m diameter to house the 3.6m telescope, at remote hilly site of Devasthal. Another challenging task was to provide material handling systems for installation of 3.6m telescope in its enclosure. Transporting of tower crane or mobile crane with 15 to 20 ton capacity of required boom length was not feasible due to constraints in the bridges in route and also space constraints at Devasthal site. Hence specific material handling systems were designed and manufactured to meet the requirements of 3.6m telescope installation from inside the enclosure. The three customized material handling systems installed in the 3.6m enclosure consisted of one 20 ton capacity motorized transfer trolley moving over rails, two 10 ton capacity single girder cranes in extension building with a span of 11.15m and two under-slung 10 ton capacity cranes in dome with a span of 4.9m. Manufactured four 10 ton capacity cranes were tested as per IS3177 to ensure safe handling of telescope components and its delicate mirrors. Cranes were provided with crane duty motors, VVVFD compatibility, digital load display, pendant control, provision for tandem operation and radio remote control. Apart from the vital role of material handling systems in installation of 3.6m telescope, they will also be very useful for carrying out maintenance activities in future. Cranes when parked will not interfere with the telescope movement during observations and are provided with low hook height and lesser carriage width. Single girder, extension building cranes are being used for loading of telescope components on motorized transfer trolley which transfers the components below the hatch opening of 5.5m x 5.5m size in observation floor of dome building. Further under-slung dome cranes are used to lift telescope components from hatch up to observational floor and thereafter cranes and dome movement facilitate placing of components at required location. Presently installation of 3.6m telescope is in progress by the AMOS team of Belgium at Devasthal site with the help of material handling systems provided by ARIES in the 3.6m enclosure. |