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螺杆式启闭机具有结构简单、安装方便、价格低廉的优点

网址:www.qibijixinghao.com  2020-12-03  作者:admin    阅读:

螺杆式启闭机具有结构简单、安装方便、价格低廉的优点,广泛用于灌区各级渠道上的涵闸和重点引水工程的闸门启闭,但是,当前使用的一些螺杆启闭机没有针对顶闸事故的有效保护措施,即便在手电两用启闭机上安装了限位开关,它也只能起限位作用。在启闭机运行过程中稍有不慎将会发生压弯螺杆、顶碎启闭机端盖,顶断启用机梁使钢筋混凝土梁上缘开裂破坏,以及启闭机台(梁)位移、旋转、倾复,甚至造成职员伤亡,电动启闭机还会引起电动机过载而烧毁电机,严重影响工程的安全运用,威胁着操纵职员的人身安全。
Screw hoist has the advantages of simple structure, convenient installation and low price. It is widely used in culvert gate of irrigation area at all levels and the gate of key water diversion project. However, some screw hoists currently used do not have effective protection measures against the top gate accident, that is, the limit switch is installed on the manual and electric dual-purpose hoist, which can only play a limiting role. Slight carelessness in the operation of the hoist will result in bending the screw, breaking the end cover of the hoist, breaking the upper edge of the reinforced concrete beam by breaking the machine beam, as well as the displacement, rotation and overturning of the hoist platform (beam), even causing casualties. The electric hoist will also lead to overload of the motor and burn the motor, which will seriously affect the safe use of the project and threaten the operation of the staff Personal safety.
1、人为因素引发的螺杆启闭机事故
1. Accident of screw hoist caused by human factors
操纵职员工作马虎,不按闸门启闭程序先检查。后操纵或原操纵职员因事请假,代班职员在不熟悉启闭程序和方法时,盲目操纵。
The operator was careless and did not check according to the gate opening and closing procedures. The post operator or the original operator asked for leave due to business, and the substitute operator operated blindly when he was not familiar with the opening and closing procedures and methods.
2、非人为因素引起的事故
2、 Accidents caused by non human factors
闸门在运行过程中,树木等漂浮物或石块等障碍物被高速水流带到闸底或冲到闸槽中卡住,若此时封闭闸门,当闸门下缘在未接触到闸底之前已被障碍物阻挡产生反力。但螺杆上的限位标志或限位开关还没有到位,不起限位停机或提醒操纵职员停机的作用,故操纵职员不会停机,启闭机将带动闸门继续下压,当反力超过启闭机或启闭台的承受耐力时,也必将发生顶闸事故。
During the operation of the gate, floating objects such as trees or stones are carried to the bottom of the gate by high-speed water flow or blocked in the gate slot. If the gate is closed at this time, the lower edge of the gate will be blocked by obstacles before it touches the bottom of the gate. However, the limit mark or limit switch on the screw is not in place, which can not stop the machine or remind the operator to stop the machine. Therefore, the operator will not stop the machine. The hoist will drive the gate to continue to depress. When the reaction force exceeds the endurance of the hoist or the hoist platform, the top gate accident will also occur.

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