Explosion-proof positive pressure cabinet operation precautions

Explosion-proof positive pressure cabinet operation precautions

Positive pressure explosion-proof control cabinet is an explosion-proof control system used in XX hazardous locations. It is mainly composed of cabinet, automatic control system, ventilation system, alarm system and ventilation system. It is an explosion-proof device integrating industrial power distribution and control. The control operation is very strict on the requirements of the staff. The following are the precautions for the operation of the explosion-proof positive pressure cabinet.

1. The use of positive-pressure explosion-proof control cabinets must be performed by professional personnel. At the same time, warning signs shall be placed at the cabinet body. No one other than professional personnel shall open the cabinet doors to operate.

2. Even when the operator is operating, it must strictly follow the requirements of a sequence of operations, it is strictly prohibited to violate the order of operations or to facilitate the simplification of the operation steps, can not meet the requirements of the step is not allowed to enter the next step, and in After the cabinet's fault is rectified, it must be checked again from the beginning. The on-site operator must conduct an inspection every half hour or so to check whether the operation is normal.

3. In the event of a special situation, it is necessary to withdraw in the middle of the operation, so before opening the operation, it is strictly prohibited to open the front door cover of the cabinet because it will cause a power failure of the cabinet.

4. The operator should always inspect the aging condition of the seal ring and find that there are parts that need to be replaced immediately when they are aging. The explosion-proof joint surface of the cabinet needs to be rust-proofed, and each time the inspection and opening of the cabinet need to be recoated with rust-proof oil. Replace the panel element or open the cover to check the situation and reattach it. Check that the seal is in good condition. Because the explosion-proof positive pressure cabinet is equipped with adjustable components inside, it is necessary to install the corresponding safety procedures, and it is forbidden to open the door in the danger zone live operation.

The explosion-proof positive pressure cabinet and its associated explosion-proof box are responsible for the power supply of the positive pressure cabinet. When the gas pressure system of the positive pressure cabinet completes the cleaning of the XX gas, the electrical box will start when the gas pressure in the cabinet is greater than 70pa. Normally, the electrical circuit of the positive pressure cabinet is powered, and the outer wall of the explosion-proof electrical cabinet is equipped with a plurality of cable inlet and outlet devices, which are connected to the power line, output cable and explosion-proof controller cable on the electrical cabinet.

One or more threaded connector through holes are provided on the entire side of the electrical cabinet, which are compressed air or other non-combustible gas inlets and positive pressure cabinets. A number of threaded joint holes are provided on the partition of the electrical cabinet, which are in line with the entrance and exit of the side. These holes are provided for the convenience of the user in the construction of the site.