2013年8月15日星期四

Separators Precautions

8.1 electromagnet should be measured before the cold insulation resistance at room temperature, its value is not less than 10MΩ.
8.2 electromagnet is not poised on the matter being sucked Do not energized before work. Forbidden to use electromagnets to make trips hammer.
8.3 Materials must be selected relatively flat parts of the suction lift.
8.4 requires high temperature materials electromagnet suction lift, lifting electromagnets normal temperature normal temperature materials is prohibited lifting electromagnet normal temperature hot object.
8.4.1 forbidden to stay in the high-temperature objects electromagnet waiting to be sucked surface temperature drops below 600 ℃ before the magnet close to the work.
8.4.2 When not in use, is strictly magnetic hooks prohibited electromagnet stay at high temperatures, hovering, storage.
8.4.3 minimize contact time electromagnets and hot objects.
8.4.4 If in the course of the electromagnet suction decreased or poles appear overheated, should be allowed to rest for some time electromagnet.
8.5 electromagnet load's center of gravity should be as symmetrical placement.
8.5.1 Note eccentric longitudinal direction, the center of gravity of the material to be sucked lifting.
8.5.2 electromagnet payload = suction weight capacity × (1 + eccentricity / space), so the spacing between the lifting electromagnet is better to be slightly larger. When the spacing between the two electromagnets small eccentricity is large, both with a deadweight electromagnet electromagnet is almost the same, the work would be extremely unsafe. The pitch can not expand the occasion, the operation should minimize the amount of eccentricity to make work safe and reliable.
8.5.3 For longer difficult to produce around the degree of steel solenoid load larger, generally using multiple combined. In this way, the suction surface level is very important, should adopt the balance-type two-beam ceiling. Except for special reasons, the use of four electromagnets, so that the hanging chain the accuracy requirements of the class is much smaller, easy to practice, commissioning and use.
8.5.4 When using more than four units when lifting electromagnets, electromagnetic adsorption surface should be carefully adjusted to suit the actual working conditions, there would be not only ineffective individual electromagnet, but will also add weight to increase the other electromagnet burden.
8.5.5 when used in combination of two materials whose spacing is half the length.
8.6 With the crane lifting electromagnet, to avoid smashed pull off the power cable.
8.7 in the operation to regularly observe the solenoid control screen voltage and current indicated value.
8.7.1 solenoid excitation current should be in the cold between the current and the thermal state current.
8.7.2 voltage allows the error does not exceed ± 10%.
8.8 electromagnet should be kept dry, non-water-cooled. After use, should be stored in dry, ventilated place no harmful substances.
8.9 Always check the chain, pin wear. Less than 90% of the original diameter, replace genuine.

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