Metallurgical Crane Configuration Requirements
metallurgical cranes are a type of lifting equipment designed specifically for metal smelting workshops. Their core purpose is to lift molten metal, and this type of operation requires a high degree of safety, reliability and efficiency. In order to ensure that metallurgical cranes are able to perform such an important task, they need to be customized in accordance with a series of complex and delicate technical configuration requirements. The following is an exhaustive description of the configuration requirements for metallurgical cranes, designed to help users gain a deeper understanding of this specialized field:
Electric motor and braking system
Motor configuration: metallurgical crane working environment is usually very harsh, high temperature, dust, corrosion and other factors may have a serious impact on the equipment. Therefore, metallurgical cranes should use special motors designed for metallurgical environment to ensure stable operation under various harsh conditions. When the ambient temperature exceeds 40 degrees, it is more important to use H-class insulated motors, which have higher heat-resistant properties and can maintain normal working condition even under extreme high temperature environment, thus ensuring the operating efficiency and safety of metallurgical cranes.
Braking system: the braking system of metallurgical crane is an important guarantee of its safety. In order to ensure the reliability and safety of braking, the crane should be equipped with two sets of independent brakes (i.e. double brake system). This design can be in a set of brake failure, another set of brakes immediately play a role, thus effectively preventing the fall of heavy objects and other safety accidents. At the same time, the lifting mechanism should also have a positive and negative contactor failure protection function. This function can immediately cut off the power supply of the brake when the contactor fails, preventing the motor from losing power while the brake is still energized, thus avoiding accidents caused by brake failure. This design not only improves the safety of metallurgical cranes, but also provides a strong guarantee for its stable operation under various complex working conditions.
Limiting and Safety Devices
Lifting capacity limiter: In the process of crane use, in order to protect the safety of lifting operations, must be installed lifting capacity limiter. This device can effectively prevent the crane from overloading, avoiding safety accidents caused by overloading, and ensuring that lifting operations can be carried out in a smooth and orderly manner.
Limit device: In order to ensure the safe operation of the crane, should be equipped with different forms (generally for the hammer and rotary and use) of the rising limit position of the double limit device, and should be set up with different disconnecting devices. When the lifting height of the crane is greater than 20 meters, it is also necessary to install a falling limit position limiting device according to the actual need, in order to prevent the crane from toppling or falling accidents in the course of operation, and to ensure the safety of personnel and equipment.
Electricity and Protection
Electrical configuration: all electrical equipment of the crane must be configured in accordance with the provisions of the relevant standards to ensure that its level of protection meets the requirements. For lifting machinery working in high temperature environment for a long time, its electric control equipment needs to take special protective measures, such as the use of high-temperature resistant cables, electrical components, etc., in order to prevent equipment damage or safety accidents due to high-temperature environment.
Overspeed protection device: in the crane hoisting mechanism, if the use of silicon controlled stator voltage regulation, eddy current brake, energy consumption brake, silicon controlled power supply or DC unit power supply speed regulation and other devices that may lead to overspeed, then must be equipped with overspeed protection device. This device can take timely measures when the crane overspeeds to prevent safety accidents caused by overspeeding.
Material and Structure
Wire Rope: Wire rope is an indispensable and important component in the use of cranes. In order to ensure the safe operation of cranes, wire ropes suitable for high temperature occasions should be selected with sufficient safety coefficients. At the same time, the choice of wire rope also needs to comply with the requirements of GB/T9143-1988 “Wire Rope for metallurgical Cranes” to ensure that its quality and performance meet the standards.
Pulley: In the selection of crane pulley, cast iron pulley should be prohibited. Because cast iron pulley is easy to be deformed or damaged under high temperature environment, which will affect the normal operation and safety performance of the crane. In order to ensure that the crane's pulley can work normally in a high temperature environment, the pulley made of high temperature resistant and high strength materials should be selected.
Working class and load
Working class: metallurgical cranes generally have a higher working class, commonly such as A7, A8 and other classes, which are suitable for relatively busy metallurgical foundries. These cranes need to have higher working capacity and greater durability to cope with heavy and continuous operation tasks. For the original crane working level is lower than A6 (excluding A6), it should be used with reduced load, the specific decline needs to be determined according to the actual working conditions, but in any case, the lifting capacity of the crane is not allowed to exceed 80% of the original rated lifting capacity to ensure the safety and stability of the equipment.
Rated lifting capacity: In metallurgical cranes, rated lifting capacity is a crucial parameter. For the rated lifting capacity of more than 10 tons has been used to electric hoist as the lifting mechanism of the lifting machinery, due to its structural characteristics and performance limitations, is not allowed to be used for lifting molten metal. For the rated lifting capacity of less than or equal to 10 tons of electric hoist lifting mechanism, if you need to be used for lifting molten metal, it is necessary to carry out rigorous modification or replacement, in order to meet the corresponding technical requirements, to ensure that it has sufficient strength and high temperature resistance.
Other requirements
Retrofit and inspection: For metallurgical cranes that need to be retrofitted, it is necessary to select a unit with the qualification of retrofitting license to carry out. In the transformation process, must strictly fulfill the notification procedures to ensure that the relevant regulatory authorities to understand the transformation in a timely manner. After the transformation of the crane, must be qualified for supervision and inspection of the organization in accordance with the “Rules for Supervision and Inspection of Hoisting Machinery” and the requirements of this comprehensive supervision and inspection, and confirm that qualified before being put into use. This process is designed to ensure that the retrofitted crane has reliable performance and safety, in line with relevant regulations and standards.
Operation and Maintenance: Operators of metallurgical cranes should receive professional training and have a comprehensive understanding of the performance and operation of the crane to ensure that they can operate the equipment correctly and safely. At the same time, regular maintenance should be carried out on the crane, including checking the electrical system, mechanical components, safety devices, etc., to ensure that it is in good working condition. In addition, a perfect maintenance record and fault handling mechanism should be established so that potential safety hazards can be found and dealt with in a timely manner to ensure the long-term stable operation of metallurgical cranes.
In summary, customized metallurgical cranes need to meet a series of strict technical configuration requirements, which cover the motor and braking system, limit and safety devices, electrical and protection, materials and structure, working level and load and other aspects. By following these requirements, you can ensure that the metallurgical cranes play a maximum role in the metal smelting workshop, while protecting the lives of staff and the production efficiency of the enterprise.
metallurgical Crane Configuration Requirements