Double-layer box body structure requirements: box body using double, sealed, anti-corrosion, temperature isolation structure, double-layer box body must be made of cold-rolled steel plate of more than 2mm thickness, double-layer must be allowed between the Ministry of Construction of fire insulation materials. The bottom frame parts of the box are welded by channel steel, the frame and door are made of cold-rolled steel plate, the thickness of the frame steel plate must not be less than 2.5mm, the thickness of the door and top cover steel plate must not be less than 2mm. the door plate is made of two layers of steel plate butt welding structure type, to ensure that the door plate is not deformed, the thickness of the bottom plate of the box is not less than 1.5mm cold-rolled steel plate. The door shaft of the box is required to be made of stainless steel, and all the lock boxes of the box are made of outdoor aluminium alloy lock boxes, with stainless steel padlocks in the lock boxes.

The metal components of the box can be anti-corrosion treatment within 20 years, and the surface covering layer of the metal material should be firmly adhered and evenly consistent after anti-corrosion treatment. All metal parts of any equipment, except non-ferrous metal and electroplated steel parts, are treated for surface corrosion protection and rust prevention, and the surface paint is guaranteed not to fall off or rust for 10 years.

The surface paint of the box is made of anti-UV, anti-ageing and long-life polyurethane type *** top paint, which guarantees no fading, no oxidation and no chalking for 10 years. The outer surface may not be sprayed with plastic technology. To ensure the sealing treatment of the box, where the door can be opened to add a seal, the seal used must be long-life (more than 10 years), highly elastic rubber products, after the door is closed, to ensure that the protection level of the box to IP33, to ensure that the box dust, moisture, condensation. The inlet and outlet cable holes use knock-down holes which are convenient for sealing.

The skeleton of the box is welded, and the skeleton should have sufficient mechanical strength and rigidity so that it will not be deformed or damaged during lifting, transportation and installation. Design of the shell shape should not be easy to accumulate dust, water; as little as possible with exposed fasteners, so as to avoid screws through the shell so that water into the shell; through the shell of the hole, should take the corresponding sealing measures; shell should be waterproof, shockproof, anti-corrosion, anti-electric combustion. Box base using channel steel structure, to ensure that the lifting transport is not deformed, the box and cable trench between the installation of the bottom plate to prevent small animals from entering.

The box is equipped with sufficient natural ventilation openings and necessary heat insulation measures to ensure that the temperature rise of all electrical components does not exceed the permissible temperature rise under normal ambient temperature; if the reactor cannot be guaranteed to operate under rated capacity by natural ventilation under ambient temperature, forced ventilation cooling is used in the room. The reactor chamber is equipped with a temperature controller, which automatically starts the fan when the temperature reaches the set value for forced cooling. Generally no less than 2 fans of comparable capacity are installed in the reactor room. And can automatically start and remove with the change of the reactor's operating temperature to control the room temperature of the reactor, to ensure the normal operation of the box change in high temperature and high humidity environment.