| Innovative Design |
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| Design of suspended hydraulic transmission rotary detection platform for large spherical tank |
| LIU Zhao1, YOU Hong-xin1, SUN Liang2,3, YANG Yu-ling1, LIU Hua-qing4 |
1.School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian 116024, China
2.China Special Equipment Inspection and Research Institute, Beijing 100029,China
3.Key Laboratory of Special Equipment Safety and Energy-saving, State Administration for Market Regulation (SAMR), Beijing 100029, China
4.School of Naval Architecture, Dalian University of Technology, Dalian 116024, China |
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Abstract As an important pressure vessel, spherical tank is widely used in industrial production. However, its weld seam vicinity is prone to produce structural damage, which seriously jeopardizes the safe use of spherical tanks. Therefore, it needs to be inspected regularly. Aiming at the problems of scaffolding in spherical tank inspection, such as long inspection period, poor detection environment and high labor intensity, a suspended hydraulic transmission rotary detection platform was designed and developed. The platform was mainly made up of the vertical hydraulic telescopic arm, the swing hydraulic telescopic arm, the hydraulic rotary device, the slewing drive device, the hydraulic lifting mechanism, the upper connecting frame, the manned frame and so on. The platform was convenient and quick to install and could perform no dead angle detection for the whole tank. Through the theoretical analysis of the detection platform, the allowable stress values of each part of the detection platform were obtained. Through force analysis, the force law of two hydraulic telescopic arms with an angle of 5°-150° was obtained. The finite element analysis for detection platform was carried out by using ANSYS Workbench, and the safety performance of the detection platform was checked. The results showed that the detection platform was safe and feasible for processing and assembling. The use of the detection platform can effectively reduce the workload of internal detection, improve the detection environment, shorten the detection period, improve the detection efficiency and save a lot of cost for enterprises and inspection agencies.
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Received: 08 January 2019
Published: 28 June 2019
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大型球罐悬吊式液压传动回转检测平台设计
球罐作为重要的压力容器，在工业生产中有着广泛的应用，但其焊缝附近极易产生结构性损伤，严重危害球罐的安全使用，因此需对球罐进行定期检测。针对目前球罐的检测需搭设脚手架，存在检测周期长、检测环境恶劣、劳动强度大等问题，设计开发了一种悬吊式液压传动回转检测平台，它主要由竖直液压伸缩臂、摆动液压伸缩臂、液压回转装置、回转驱动装置、液压升降机构、上连接架及载人框等构成。该检测平台安装方便、快捷，可对球罐进行无死角检测。通过对检测平台安全性能进行理论分析，得出了检测平台各部分的许用应力值；通过受力分析得出了两液压伸缩臂在其夹角为5°~150°时的受力规律；采用ANSYS Workbench软件对检测平台进行了有限元分析，对检测平台的安全性能进行了校核。结果表明设计的检测平台安全且具有加工与装配的可行性。该检测平台的使用可有效减少球罐内部检测的工作量，改善检测环境，缩短检测周期，提高检测效率，可为企业和检测机构节约大量成本。
关键词：
球罐检测,
载人检测平台,
液压,
有限元分析
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