沟井电缆升降装置的研制
2019-10-24陈彬
陈彬
摘 要:近年来,随着城市的建设和发展,电力电缆线路相较于架空线路占用城市空间少、安全、稳定等特性得到体现。但多数电缆线路在沟井内堆叠在一起,堵住电缆管道造成检修困难,井内空间狭小,现场吊车无法驶入或吊臂安全距离不满足要求,检修只能投入大量人力拽拉电缆,消耗较多时间和体力,工作效率较低,作业存在较大安全隐患。如何有效缩短电缆检修时间,快速恢复供电,提升作业安全性与高效性,具有极大现实需求。
关键词:沟井电缆;升降装置;研制
中图分类号:TM726 文献标志码:A 文章编号:2095-2945(2019)24-0042-02
Abstract: In recent years, with the construction and development of cities, compared with overhead lines, power cable lines occupy less urban space, hence safety, stability and other characteristics. However, most of the cable lines are stacked together in the trench wells, blocking the cable pipes and causing difficulties in maintenance. Since the space in the well is narrow, the site crane is unable to drive in, the safety distance of the crane arm does not meet the requirements, and a lot of manpower can only be put into the maintenance to pull the cable. It consumes more time and physical strength, the work efficiency is low, and there is a great hidden danger of safety in the operation. As regards how to effectively shorten the cable maintenance time, quickly restore power supply, and improve the safety and efficiency of operation, there is a great practical demand.
Keywords: trench cable; lifting device; development
前言
为了有效缩短电缆检修、抢修时间,快速恢复供电,提升作业安全性与高效性,本文对沟井电缆升降装置进行有效研制,意在为电力维修提供一定的实际参考。
1 设定目标
1.1 确定目标
研制出的沟井电缆升降装置,应满足以下方面的要求:
(1)升降装置应保证安全可靠,考虑10千伏配网最大电缆型号YJV22-3*300电缆的重量,装置各部件的安全强度应满足吊装300kg(2人*50kg=100kg)重物强度要求,设计安全裕度为3。
(2)升降装置使用应不受地形限制,便于携带安装。
(3)降低作业难度,减少人员占用、减少作业时间。
1.2 目标值量化
现有电缆检修作业,需要投入6人工作:其中4人负责移动电缆,2人负责检修工作。通过统计公司近年来电缆检修时间,约4.5小时。电缆检修所需工时为6人*4.5工时=27工时。通过设计电缆升降装置进行电缆升降移动整个过程减少2人操作,由于装置的协助,使得检修过程效率提升,故障电缆检修时间可以降低1小时。……
