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the crane work level

How to distinguish between the crane work level?

Hydropower Station Overhead Crane

The crane is intermittent work machine, has the characteristics of short and repeated work. At work, crane agencies sometimes stop and sometimes forward, from time to time reversal. Some crane worked day and night, some works only one day, some even work only a few times a day. This kind of work conditions show that the crane and its mechanism of busy degree is different.

At the same time, the effect on the crane load is also changing, some cranes are often full, some often only light load, the load is quite different. In addition, due to the speed of different agencies, have different degree of dynamic shock loading. The working characteristics of the crane, must consider the design of crane,  metal structure parts, and determine the crane power.

Today, the crane work level is one of the main technical parameters, it replaced the old unreasonable system of work.

Overhead Crane is the overall level of work:

The working level of crane is a crane work hard degree of parameters, That parameters of crane work in terms of time and degree of the degree of heavy load, the hook type is divided into: A1-A3 (light); A4-A5 (intermediate); A6-A7 (heavy) three levels of seven. Light level (A1 to A3) : few hoisting load rating, general lifting slightly load, used in power plant or other workplaces in installation and maintenance equipment, Work is not commonly used workshop and warehouse.

Intermediate (A4, A5) : sometimes hoisting load rating, general lifting medium load, workshop and garage for heavy work, like general mechanical processing and assembly workshop.

Heavy level (A6 – A7) : lifting load rating as usual, general hoisting heavy load, heavy work workshop and warehouse for work, Such as long time lift frequent carrying heavy frontal heavy goods and using metallurgical plant.

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