Research And Design On Unmanned System Of Crane Used In Nuclear Waster Solidification Bucket Transport

In recent years, with the pace of global nuclear power construction accelerating, the safe disposal of nuclear wastes has become an urgent problem to be solved. Nowadays, it is usually reserved nearby and transformed to be kept in permanent processing plant in most countries for the problem of nuclear waste treatment. In this method, the temporary transfer of nuclear waste solidification barrel is operated mainly by special crane, and the transport efficiency and quality is mainly decided by the special crane. However, due to technical reasons, the development of Chinese transport crane is still in the artificial transfer stage, and the curing barrel mostly is transported closely by operators’manual operation wearing protective clothing. For the strong radiation of waste solidification bucket, long-term close contact would cause great damage to the operators’body, so with the development of nuclear technology in China as well as the government increasing importance to the safety of production, China urgently need a set of unmanned, remote operative and high-accuracy nuclear barrel transfer crane to ensure safety of the transfer of the nuclear barrel.In view of the above background, according to the actual situation of China’s current nuclear curing transfer barrel and with the goal of unattended operation of nuclear waste Solidification barrel transfer ladle crane, the redundant design of the crane system and special-purpose hoist, crane fault diagnosis and restoration designs were studied. Main work is as follows:1. In order to ensure security and reliability of the unattended operative crane, combined with the specific work process of solidification drum transportation, the crane system redundancy design is finished.2. For curing bucket crane system implementation of the core module of the unattended: sling system, combined with solidification drum’s structure characteristics and clamping and loosening clamping and loosening requirements, a set of redundant power driven, automatic aligning, three claw and synchronous telescoping automatic lifting device is designed to complete reliable clamping and loosening of solidification barrel.3. To maximize to reduce the manual intervention of the system, aiming at the key potential points of failure, a fault self-diagnosis and treatment system is designed to ensure the system can master the operation state of the system at any time; when the fault occurs, the system quickly gets fault diagnosis results to find the fault point. And according to the fault reason of corresponding fault processing, ensures the crane system without manual intervention and reliable operation; Based on the software engineering technology, The PC end program of crane fault diagnosis and treatment is built to display the running state of the system, fault diagnosis and treatment, so that the operator can control the operation of the whole system in any one time.4. Based on working principle of the system hardware and software, a system fault tree with the barrels handling failure probability as the top event is built, and focuses on reliable quantitative analysis of the operation process of the crane system,further to ensure reliability of safe operation of the system.Eventually, through the prototype test and field test of the project of the system, the entire crane system achieves the unattended solidification drum transportation safely and reliably.