起重机钢丝绳长度必须保证吊钩降到最低位置
19页1、起重机钢丝绳长度必须保证吊钩降到最低位置刖言preface门座式起重机是港口装卸作业的重要设备,担负着重要的件货和 散货等装卸任务,由于门座式起重机本身具有良好的性能,所以港口 使用较为广泛。门座起重机是随着港口事业的发展而发展起来的。1890年,第一次将幅度不可变的固定式可旋转臂架型起重机装在横 跨于窄码头上方的运行式半门座上,成为早期的港用半门座起重机随 着码头宽度的加大,门座和半门座起重机并列发展,并普遍采用俯仰 臂架和水平变幅系统。本文从几个方面,谈谈门座式起重机的安全使 用问题。Portal crane is an important equipment of port loading and unloading operation, shoulders the important pieces of cargo and bulk cargo loading and unloading task, because the portal crane itself has good performance, so the port used more widely. Door c
2、rane is developed with the development of the port. In 1890, for the first time will be immutable fixed amplitude can rotate boom cranes used in across the narrow at the top of the pier operation type half door seat, as early as a port with half door crane wharf width increases, the door and half door crane joint development, and generally used luffing boom luffing system and level. In this paper, from several aspects, talk about the safe use of portal crane.2.门座式起重机门的分类2. The classification of
3、the portal crane gate门座式起重机门按用途可分为3类:Portal crane gate according to use can be divided into three categories:2.1装卸用门座起重机2.1 loading and unloading crane with door主要用于港口和露天堆料场,用抓斗或吊钩装卸。起重量一般不 限吨数,随幅度变化。工作速度较高,故生产率常是重要指标。Mainly used for outdoor stocking yard, port and grab or hook load and unload. Lifting weight, generally no tonnage, along with the amplitude changes. Working speed is higher, so the productivity is often important indicators.2.2造船用门座起重机2.2 shipbuilding crane with door主要用于船台、浮船坞和舣装现
4、场,进行船体拼接、设备舣装等 吊装工作,用吊钩作为吊具。最大起重量达300吨,幅度大时起重量 相应减小。有多档起升速度,吊重轻时可提高起升速度。有些工作机 构还备有微动装置,以满足安装要求。门座高度大者,可适应大起升 高度和大幅度作业的要求,但工作速度较低,作业生产率不高。Is mainly used in shipbuilding, dock and fitting-out scene, carries on the hull splicing, fitting-out equipment hoisting work, with hook as a spreader. Maximum weight of 300 tons, at the time of its large range corresponding decrease in weight. How much gear hoisting speed, hoisting weight lifting speed can be improved. Some work institutions also have micro de
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