Sometimes accidents in the workplace can occur, damaging machinery, infrastructure, products, or even people. However, most accidents are caused by a failure in the execution of safety protocols, either by lack of maintenance of lifting devices, by making those devices work beyond their capacities, or because there is a wrong calculation of external variables that affect the working capacity of the machinery.
The lifting electromagnets are one of the most versatile and functional devices in any environment and company that works with metallic elements or subproducts. Therefore it is a device in which we have a lot of experience adapting it to different environments.
In Crosby Airpes, we work under the most advanced controls and methods of calculating efforts in the design of all our lifting electromagnets. This article will describe some guidelines so that a lifting magnet always works at maximum performance without being a risk for anyone.
Active and passive safety in lifting magnets
As in the case of vehicles, there are two types of safety measures for electromagnets, lifting magnets and any lifting device:
- Active safety
- Passive safety.
To avoid accidents and damage in Crosby Airpes, we pay attention to these two types of safety levels that must be considered when designing every one of our electromagnets and lifting magnets.
But what is the difference between active safety and passive safety?
Active safety in lifting magnets
The rules and elements of active safety are all those devices, sensors, and standards of use of the lifting magnet that prevent an accident with a lifting electromagnet. Some examples of active safety regulations are the following.
The operator of the electromagnet must always be an authorized and qualified worker to operate this type of machinery. Never authorize anyone without the necessary knowledge to use a lifting electromagnet.
Never use the lifting electromagnet without inspecting it visually and ensuring that all elements of the device are in good condition.
Respect load limits
The loads to be lifted must be within the ratio limits marked by the rule of theoretical maximum load/actual load. Usually, this limit is quite conservative. The most common ratio we mark for most electromagnets is 3:1, although we can change it from one electromagnet to another. For example, if the theoretical limit of the electromagnet is 6 tons, never attempt to lift more than 2 tons of material.
Pay attention to the temperature under which you operate the lifting magnet. The most common safety limit is 70ºC or 150ºF. This limit is because ferric materials lose electromagnetic capacities when the temperature increases. If you work at high temperatures, Crosby Airpes will incorporate these data in calculating stress efforts during the design or look for other lifting systems that do not work with magnetization.
Avoid vibrations during operations.
It would be best if you balanced the load before lifting it.
The lifting magnet will incorporate sound to warn that it is operating and, in some cases (plants with an intense noise), also lights.
All our electromagnets incorporate batteries to prevent the load from being released if there is a power loss or failure.
Make sure that the surfaces of the elements to be lifted are clean and have no coatings (paint, varnish, etc.) thicker than what is recommended by Crosby Airpes.
We can fit Crosby Airpes electromagnets with support sensors, i.e., they can detect if the load is already on the ground before releasing it.
The movements of the crane must be smooth. The crane holding the electromagnet should not be accelerated or decelerated abruptly.
Make sure the equipment is serviced according to the Crosby Airpes inspection schedule.
Passive safety in lifting magnets
Passive safety standards and elements are all those devices, sensors, and rules that prevent serious personal injury or material damage to workers or the company in the event of an accident. Some examples of passive safety rules that minimize damage in an accident are the following.
- The electromagnet should not travel above areas where elements or goods of the company are susceptible to damage, such as other machinery, vehicles, etc.
- No one should be in the operating area when the electromagnet is working, under no circumstances.
- People with metal body implants and/or heart pacemakers should not get close to the electromagnet and its working area at any time and under any circumstance.
You may be interested in: 5 safety tips while using electromagnets
The actual operation of an electromagnet
- In this video, you can see an electromagnet working in a real environment.
- An operator inside the crane’s cabin is controlling this electromagnet.
- There are two types of electromagnets in this video. One is on a fixed beam, and the other is on an extensible beam.
Two types of lifting magnets to fulfill your needs
At Crosby Airpes, we design lifting electromagnets, and permanent electromagnets adapted to your projects.