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卡环又称卸甲或卸扣,是起重工作中最常用的吊索附件之一,多与开式吊索端部的钢丝绳套相连,用于捆绑物件时固定吊索,有时也用来连接吊钩。卡环的构造简单,装卸方便,使用安全可靠。卡环的型号以号码表示,号码用来查找书上表格数据。但是,在进行起重工作时,常需在现场立即判断出卡环的容许起重量。这可用下述经验公式进行估算:Q=4d_1~2式中 Q——卡环的容许起重量,以公斤为单位;d_1——卡环的横销直径,以毫米为单位。例:有一卡环横销直径为18毫米,估算此卡环的容许起重量。解 Q=4d_1~2=4×18×18
The snap ring, also known as relieving or shackle, is one of the most commonly used hanger attachments in lifting work. It is mostly connected with the wire rope sleeve at the end of the open sling, and is used to fix the sling when binding items. Sometimes it is also used to Connect the hook. The snap ring has a simple structure, is easy to load and unload, and is safe and reliable to use. The type of snap ring is represented by a number, which is used to find the form data on the book. However, when carrying out lifting work, it is often necessary to immediately judge the allowable lifting weight of the snap ring on site. This can be estimated using the following empirical formula: Q=4d_1~2 where Q is the allowable lifting weight of the snap ring in kilograms and d_1 is the diameter of the snap ring’s horizontal pin in millimeters. Example: There is a ring with a diameter of 18 mm for the cross pin, and the allowable lifting weight of this ring is estimated. Solution Q=4d_1~2=4×18×18