Pressurized explosion-proof control cabinet refers to the principle that the pressure of protective gas in the pressurized closed space is higher than the external atmospheric pressure, which can effectively prevent the external explosive gas from entering the closed space or dilute the explosive gas concentration released in the closed space to below the explosion index to complete its application.

1.Explosion-Proof Control Cabinet Air Supply Part

Its main function is not only to ensure rapid ventilation, but also to ensure that it is maintained at a normal positive pressure value during operation. In the rapid ventilation link, it can effectively ensure the minimum ventilation flow and ventilation time. In normal operation, the positive pressure is maintained with a low flow. When a fault occurs, it must be exhausted as soon as possible to keep the working pressure within the normal range.

2.Electrical Control Part Of Explosion-Proof Control Cabinet

2.1 The function of the ventilation control system is to reasonably ensure that the positive pressure control explosion-proof cabinet can be ventilated before use, and the next actual operation can be carried out after ventilation is completed. This process is called the delay system, which is a necessary process to ensure the explosion-proof characteristics.

2.2 Pressure monitoring system: Use pressure sensors to monitor the pressure of the positive pressure shell, and analyze and process the pressure data. The pressure sensor can reflect the system pressure and transmit it to the sub-control center of the DCS distributed control system.

2.3 Alarm device: The output control signal is processed by the automatic continuous tracking detection system and the pressure monitoring structure analysis to form an execution system, including the function of automatic power off or alarm display when the positive pressure value in the positive pressure shell is less than 50Pa or the shell is under high pressure.

2.4. Automatic continuous tracking monitoring system: The DCS distributed control system is used to manage, operate, monitor and decentralized pressure collection, monitoring, ventilation, alarm, monitoring and abnormal pressure.