explosion-proof electric actuator
The explosion-proof electric actuator can withstand the internal explosion of the flammable mixture that has entered the interior of the casing without damage, and will not ignite the gas formed by one or more gases or vapors through any joint surface or hole on the casing. Electrical equipment enclosures for external explosive atmospheres.
The motor adopts low inertia, high torque motor, which can quickly reach the peak torque after the motor starts, and there is almost no over-limit movement when not excited; there is a precise temperature sensor in the motor, and the over-temperature limit is set through the control system to avoid damage caused by overheating of the motor.
The independent sealed terminal cavity can ensure the sealing integrity of the electrical part of the electric actuator during on-site wiring, while meeting the product explosion-proof requirements.
Shell anti- corrosion
The outer surface of the actuator is painted with a tough, strong-adhesion aluminum alloy metal paint, which has strong UV resistance, corrosion resistance and high fullness. It can comprehensively improve the service life and self-cleaning properties of the coating and is suitable for various harsh production environments.
The actuator adopts a double-seal design structure to ensure that the actuator is waterproof and dustproof; the standard product protection level is IP67.
Human-machine interface LCD display
The communication module adopts an independent structure superimposed on the mainboard to meet the needs of different communication media and different communication protocol systems. Currently supported communication protocols include ModbusRTU, PROFIBUS-DPV0/DPV1, HART, FF, DeviceNe (optional)
The actuator uses infrared remote control technology, which allows human-machine dialogue through a sealed dialogue window without opening the actuator cover. Even in dangerous situations, the intrinsically safe remote control can safely set the parameters of the actuator.
(Optional) Electronic torque measurement: By detecting the real-time current, voltage and magnetic flux of the motor, and cooperating with the single-chip microcomputer for comprehensive calculation, accurate output torque is obtained to achieve continuous measurement; this system does not need to consider mechanical wear, which improves the reliability of the system.
Accurate valve position travel measurement and protection The actuator uses a {{0}}bit absolute encoder to measure the valve position travel, with a travel of 4096 turns and a single-turn angle resolution of 0.088 degree . The encoder is integrated with a magnetic motor. In the event of power loss, there is no need to worry about the loss of valve position when manually operating the actuator. The advanced boundary anti-jitter technology is used to ensure high-speed, stable and reliable output data, effectively improving the stability and reliability of the system.
Overload and short circuit: The circuit designed with precision voltage conversion chip meets the precision measurement of large-scale current changes: overload anti-delay characteristics and short-circuit protection meet relevant standards.
Preventing the generation of explosion must be considered from the above three necessary conditions, and limiting one of the necessary conditions limits the generation of explosion. Electrical equipment is also a potential source of ignition. When the machine is running, it will cause the surface temperature to rise, electrostatic discharge or electric sparks caused by instantaneous current. From the design point of view, flameproof electrical equipment can seal the ignited explosive mixture in a casing, which is particularly strong, can withstand the explosion pressure of the internal explosive mixture, and prevent the explosion of the explosive mixture outside the casing. Therefore, explosion-proof electrical equipment can be prevented from becoming a potential source of ignition.
The explosion-proof electric actuator produced by our company is designed to prevent internal sparks or explosion carriers from contacting the outside through the explosion-proof surface of the shell. The gap between the explosion-proof joint surface ( Less than or equal to 0.15mm) and the large enough Face width (12.5mm-25mm) to ensure this. In addition, the joint surfaces of each component, such as the number of thread turns, thread accuracy, zero point, screw, between the finger window and the shell, the gap between the motor and the output port, the component and the component, and the wire port, etc., are all in accordance with the interval Design according to the requirements of the explosion, so as to ensure that the high pressure generated by the internal explosion will not damage the actuator.
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