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Lifting Hook Maintenance Jun 09, 2017


Lifting hooks as a lifting machinery and equipment is more common a spreader, the importance of its daily maintenance is not to be underestimated today, small Victoria with you to understand the maintenance of the hook on the knowledge.

Hook, hook, hook, hook, hook, hook, hook, hook, hook, hook, hook, hook, hook, hook, hook , Eye-shaped slip hook, with insurance card ring screws, chain shackles, etc., Hoist Hook now mainly introduce the following three:

Sheet hooks

Table hook is divided into single hook and double hook two, generally with C3 and 16Mn steel plate multi-chip riveting overlap. This hook hook structure is simple, reliable, and easy maintenance. Single hook is used for casting cranes, Hoist Hook double hooks are used for more than 100 tons of general-purpose cranes.

Forged hooks

Forged hooks are divided into two types: single hook and double hook. Generally used 20,20MnSi steel as a whole forging. Because single hook eccentricity, force less than double hook symmetrical force advantage, so 75 tons of small and medium tonnage crane more than a single hook, more than 75 tons of large tonnage crane double hook. This hook is widely used, has formed a series. For the use of wire rope when there is a risk of decoupling due to safety hooks.

The lifting ring is advantageous over the force of the hook, Hoist Hook and when the weight is the same, it is lighter in weight, but it is not easy to use because it is not hooked. Therefore, the use of the rings is much better than the hooks. It is mainly used for heavy work, from the weight of the crane. Its structure is divided into two kinds of integral and articulated, the latter use more.

The daily maintenance of the hook

Lifting hooks to eliminate the hidden dangers, maintenance is the most unnecessary. Hoist Hook Routine inspection and maintenance includes the following:

1, the main hook to wipe clean;

2, lubrication pulleys, rotating parts and other parts of the mouth;

3, check all the bolts, screws, make sure that all the cotter is complete and open the opening;

4, check the pulley groove and rim wear is uniform, whether the rope and wheel groove match, pulley is loose or shaking phenomenon;

5, to ensure that the hook rotation part of the rotation free, the gap can not be too large. If the rotation is difficult or the feeling of stuck need to check whether the bearing, Hoist Hook sleeve damage or lack of lubrication;

6, check the main hook overload damage;

7, check the side plate elongation, aperture elongation, bolt bending or elongation, cracks and so on;

8, check the anti-off hook device.

To carry out the daily maintenance of the hook, some of the hidden dangers are in the bud to eliminate, this is not only responsible for the progress of the project, but also responsible for the life and property of the construction staff.