The following precautions must be strictly followed during the installation, commissioning, use, and maintenance of the variable-frequency speed-regulating bridge crane, otherwise personal injury and equipment damage will occur.After the control system is connected to the power supply, the commissioning and maintenance personnel must be particularly careful when working. After the power supply is disconnected, the inverter's charging indicator must be off before touching the components inside the cabinet to perform necessary operations.It is absolutely forbidden to connect the input power ...
Single beam crane is a special equipment commonly used in factories, the maintenance cost during use is a large cost that is difficult to avoid, so, how can we reduce the maintenance cost?1. Try to choose a higher configuration (such as a frequency conversion single beam crane) when purchasing, the price will be higher, but the higher performance will indeed avoid a lot of trouble.2. If use a traditional single beam crane, it is especially important to do daily maintenance. Special maintenance should be carried out for maintenance, daily inspection, weekly inspection, and monthly inspection sh ...
What are the requirements that a single beam crane should meet during no-load trial operation?1. The operation direction and the running direction of the single beam crane mechanism should meet the design requirements;2. Start the motors of each mechanism separately, and the operation should be normal, and measure the no-load current;3. The actions of safety protection devices and brakes shall be accurate and reliable;4. Electrical equipment such as power distribution screens, cabinets, motors, and controllers should work normally;5. Each operation and lifting mechanism should go back and fort ...
The common major accidents in running cranes are "overturning", "falling arm" and "folding arm".To avoid “overturning” accidents, the running crane is strictly prohibited from overloading and lifting. If the weight is unclear, can lift the weight slightly off the ground first, and then kick the heavy arm reverse support (outrigger) with your feet, if the arm moves, must not lift the objects. During lifting operation, it is strictly forbidden to extend the boom after lifting to prevent the over-torque from losing stability; in addition, oblique lifting should be av ...
In order to obtain ultra-fine-grained steel, a variety of process methods have been developed: repeat heat treatment under the same rapid heating condition, mechanical grinding of metal powder, controlled rolling, controlled cooling, TMCP, composite TMCP method, etc. The ultrafine grains is the determinant of the excellent strength and toughness of ultrafine grain steels. Therefore, the difference between ultrafine grain steels and traditional steels is that their chemical composition cannot be used to predict strength of steel.Compared with traditional steels of the same strength, the main fe ...
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