Method of creating continuous shiploader machine based on portal crane

A method for creating a continuous shiploader machine is proposed, involving the attachment of a telescopic conveyor boom to the supporting structure of a portal crane and the use of its mechanisms to control all movements of the boom. The article pays particular attention to the issue of dust emissions from bulk cargoes in existing ports of the Russian Federation, which continue to use clamshell grab cranes for transshipment. It is noted that the currently implemented comprehensive anti-dust measures do not eliminate spillage and dust loss of bulk cargo during loading and unloading operations with grab cranes at the berth. At present, the only effective solution is the introduction of costly shiploaders, which acts as a deterrent to development for many Russian ports due to the unprofitability of such investments. To improve the environmental performance and efficiency of bulk cargo transshipment at the berths of existing ports, the task was set to develop a more affordable method for transitioning from clamshell grab cranes to modern continuous-operation shiploaders. As part of the research, a special attachment for a telescopic conveyor boom to the portal crane was developed. The general view of the machine is presented, along with images of articulated and stationary fastenings to portal cranes of various designs. The principles of operation of the portal crane mechanisms are considered both in conjunction with the telescopic boom when shipping bulk cargoes and when the crane operates independently with its own hook grip for handling general cargo. A comparative analysis of the main technical characteristics and cost indicators of the developed shiploader is performed. Its main advantages and disadvantages are identified. The proposed method for creating a shiploader based on a portal crane demonstrates the possibility of constructing a new type of cargo handling equipment that combines high productivity and environmental performance, versatility of application, ease of implementation in existing ports, as well as low manufacturing and installation costs.