Explosion-proof positive pressure cabinet structural features and main functions in the environment

The main function of explosion-proof pressurized cabinets is to prevent the occurrence of explosions and fires, protect equipment from external environmental hazards, ensure personnel safety, and maintain the stability of equipment operation. By utilizing special structures and materials, explosion-proof pressurized cabinets effectively prevent the generation and propagation of electrical sparks or high temperatures, thereby reducing the risk of explosions and fires. At the same time, these cabinets employ positive pressure technology to maintain a safe internal environment. This technology works by maintaining a higher pressure inside the cabinet than the external environment, preventing hazardous external gases from entering. By continuously introducing clean, dry air or inert gas into the cabinet, the explosion-proof pressurized cabinet ensures that the internal gas environment remains safe.
1. Equipped with an independent Class IIC explosion-proof positive pressure automatic control system, it features functions such as automatic air exchange, air replenishment, automatic pressure relief in case of overpressure, low-pressure alarm, and low-pressure interlock power cutoff, making it extremely convenient to use. 2. The interlock alarm device responds promptly in the event of a malfunction, notifying staff to troubleshoot and address the issue in a timely manner, thereby reducing safety risks. 3. The positive pressure cabinet system includes a purging function, which can dissipate heat generated by instruments and meters through air intake circulation, ensuring excellent heat dissipation performance. The explosion-proof pressurized cabinet's functionality and structural characteristics: Its explosion-proof principle primarily relies on isolating ignition sources with a medium to achieve electrical explosion protection. Structurally, it can be customized into box-type, console-type, or cabinet-type designs based on user requirements, with cabinet types further divided into upper-lower and left-right structures. Box-type cabinets are typically made of welded steel plates with a surface spray coating and front-door operation. Console-type and cabinet-type designs use standard welded profiles with a surface spray coating, and all joints undergo special sealing treatment; they feature front-door operation and rear-door maintenance. Steel plate materials are generally selected from GB710-88 cold-rolled steel plates, but GB3280-84 stainless steel can also be used based on user requirements. The main cabinet serves as the positive pressure chamber with a protection rating of IP54, while the auxiliary cabinet houses the positive pressure control system with a protection rating of IP31. Based on the air intake method, they are classified into ventilation type and compensation type. The ventilation type provides uninterrupted continuous air supply, allowing heat generated by components in the positive pressure chamber to be carried away by the airflow, offering excellent heat dissipation. The compensation type provides intermittent air supply, with the positive pressure chamber having good sealing properties and low air consumption.
Comprehensive protection devices are included: The control cabinet is equipped with an air exchange and power supply interlock device, which automatically supplies power only after the specified air exchange time is reached. It also features automatic high and low-pressure audio-visual alarms, pressure lower limit protection, automatic power cutoff upon door opening, and emergency manual power cutoff for safety interlock protection. The sealing performance is reliable, with the housing employing multiple sealing protections, ensuring long pressure maintenance times and reducing operating costs. This cabinet adopts a cable trench base installation format, and users need to provide a protective gas source. The product interior can accommodate detection instruments, analytical instruments, display instruments, low-voltage electrical appliances, frequency converters, soft starters, or computer control systems, making it suitable for signal processing and control systems. For customization, users must provide a complete electrical system diagram and a list of materials for the internal control system.