Working level of electric single beam suspension crane

The electric single-beam suspension crane is a commonly used single-beam lifting equipment, which can be directly installed on the I-beam of the existing factory roof structure. Therefore, it is not necessary to install the supporting rail beam and the crane rail. This way customers can reduce costs. And use the entire plant area for production. And by using the side cantilever. The trolley can travel beyond the crane gauge. So that customers can more effectively use the plant area.

Many customers don’t know much about the working level of single-beam suspension cranes. The editor of our factory will give you a brief explanation here:

The working level of a crane is a parameter indicating the degree of heavy lifting of the crane, that is, a parameter indicating the degree of heavy lifting and full load of the crane in terms of time. It can be divided into A1-A3 (light level); A4-A5 (intermediate level); A6-A7 (heavy level) 7 items. As shown in the following table:

負荷の状態

公称負荷係数はスペクトル(K P )

Utilization level

U0

U1

U2

U3

U4

U5

U6

U7

U8

U9

Q 1 -light

0.125

A1

A2

A3

A4

A5

A6

A7

A8

Q 2 —medium

0.25

A1

A2

A3

A4

A5

A6

A7

A8

Q 3 -heavy

0.5

A1

A2

A3

A4

A5

A6

A7

A8

Q 4 —Extra heavy

1.0

A2

A3

A4

A5

A6

A7

A8

The working level of electric single-beam suspension cranes is generally A3-A5, and the working level of explosion-proof single-beam suspension cranes is the same.

The working level of a single beam suspension crane is related to its own frequency of use and the load status of the crane. As shown in the above table, the frequency is represented by the total number of working cycles N. According to the total number of cycles N, the crane utilization level is divided into U0 ~ U910 level.

Utilization level	Total number of working cycles N	注意
U 0 U 1 U 2 U 3	1.6×10 4 3.2×10 4 6.3×10 4 1.25×10 5	いないことが多いのですが）などに使用
U 4	2.5×10 5	Use often and leisurely
U 5	5×10 5	よく使われると緩やかに
U 6	1×10 6	なにぎわいを
U 7 U 8 U 9	2×10 6 4×10 6 >4×10 6	忙しい使用

The purpose of dividing work levels is to provide a reasonable and unified technical foundation and reference standards for design, manufacturing and user selection, so as to achieve better safety and economic effects, and to accurately reflect the working status of the crane. It can also improve the generalization level of クレーン部品, and realize that parts of cranes with different lifting weights can be used on cranes of the same working level. The working level of the crane is an important basis for the design of the components, parts and components of the crane, as well as the basis for safety inspection, accident analysis and calculation, and the determination of scrap standards. Generally speaking, the safety factor is different for different work levels, and the scrap standard is also different.