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You are here: ⎝⎛天天电玩城⎞⎠ » Yunfan Rigging Information Center » Industry Information » Types of hooks and scrap standards

Types of hooks and scrap standards

责任编辑: 人气: - 发表时间:2018-03-16 14:19【 Article source: Editor-in-chief: Popularity : -Published time: 2018-03-16 14:19


The hook is the main load-bearing part of the electric hoist, mainly in two forms: single hook and double hook.

Single hook: It is a commonly used hook with simple structure and convenient use. The material is generally forged with 20 # high quality carbon steel or 20Mn, and the maximum lifting weight is not more than 80 tons.

Double hooks: Double hooks are used when the lifting weight is large, and the force is even and symmetrical. The material is generally forged with 20 # high quality carbon steel or 20Mn. Generally, double hooks are used for lifting equipment larger than 80 tons.

Laminated hooks are formed by cutting and forming multiple pieces of steel plates. Since the hook plates will not break at the same time, the work reliability is better than the forged hooks as a whole. The disadvantages are their own weight and large size.


Scrap standards for hooks:

The hook is cracked; the dangerous section wear is 10% of the original size; the opening degree is increased by 15% compared with the original size; the torsional deformation is more than 10 degrees, the disadvantage is that the weight and size are large.


The hook should be scrapped when one of the following occurs:

Crack

2. Dangerous section wear is 10% of the original size;

3. The opening degree is increased by 10% than the original size;

4. The torsional deformation of the hook body exceeds 10 °;

5. Dangerous section of hook or plastic deformation of hook neck;

6. The hook thread is corroded;

7. When the bushing bushing wear reaches 50% of the original size, the bushing should be replaced;

8. When the abrasion of the hook mandrel reaches 5% of the original size, the mandrel should be replaced.



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