What are the requirements for selecting explosion-proof stepping electric cylinders in the chemical production industry?

During the operation of chemical production equipment, explosion-proof stepping electric cylinders need to push or pull various components, and the load conditions are complex and diverse. Before selection, it is necessary to accurately calculate the maximum load during equipment operation, including static load and dynamic load.

For example, in the stirring system of chemical reaction kettles, explosion-proof stepping electric cylinders must not only bear the gravity of the stirring paddle (static load) but also overcome the resistance generated during material stirring (dynamic load).

If the load calculation is inaccurate and the selected explosion-proof stepping electric cylinder has insufficient load capacity, it will cause the explosion-proof stepping electric cylinder to operate unsmoothly, or even cause the motor to burn out due to overload; on the other hand, if the load capacity is too large, it will result in cost waste and unreasonable occupation of equipment space.

Generally speaking, the rated load of an explosion-proof stepping electric cylinder should be 1.2 - 1.5 times greater than the actual maximum load to ensure an adequate safety factor.

The chemical production environment is special, so explosion-proof stepping electric cylinders must have good environmental adaptability.

In environments with corrosive gases or liquids, such as workshops producing acid-base solutions, components such as the cylinder body and piston rod of explosion-proof stepping electric cylinders need to be made of corrosion-resistant materials, such as stainless steel, metal materials treated with special anti-corrosion coatings, etc.

In high-temperature environments, high-temperature resistant sealing materials and motor insulation materials should be selected to ensure that explosion-proof stepping electric cylinders can operate normally under high-temperature working conditions; in low-temperature environments, it is necessary to consider the performance of lubricating oil and seals of explosion-proof stepping electric cylinders at low temperatures to avoid affecting equipment operation due to lubricating oil solidification and seal hardening.

In addition, in flammable and explosive environments, explosion-proof stepping electric cylinders should be selected, and their electrical components must comply with corresponding explosion-proof standards to prevent electric sparks from causing explosion accidents.

The chemical production process has strict requirements on the control precision and operating speed of equipment. For some operations that require precise measurement and positioning, such as the accurate addition of chemical raw materials and the precise control of valves, the positioning accuracy of explosion-proof stepping electric cylinders is crucial.

At this time, high-precision explosion-proof stepping electric cylinders should be selected, whose repeat positioning accuracy can reach ±0.01mm or even higher. At the same time, the operating speed of explosion-proof stepping electric cylinders should be reasonably selected according to the production process requirements.

For example, in continuous production lines, explosion-proof stepping electric cylinders need to respond quickly to meet the production rhythm; while in some fine chemical operations, the speed needs to be stable and controllable to avoid affecting product quality due to excessive speed.