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In the shielding machine room engineering design need to grasp the following content.
1 shielding machine room design and construction should meet the standards
(1) applicable frequency range.
1)Frequency range of 14kHz ~ 10GHz.
2)Overall shielding index. Shielded machine room in all frequency bands to meet the requirements of the indicators in GJBZ20219-1994 (Class A, Class B, Class C).
(2) shielding machine room structure form, composition. Shielding machine room by shielding the main body of the machine room and the composition of the sub-systems. Shielded room body should ensure the safety of electronic information, not only to prevent the leakage of information loss of confidentiality, but also to prevent the outside world of strong electromagnetic field interference, at the same time, for the internal decoration and installation of sub-systems to provide the basis. Each sub-system ensures the functions of power supply, electricity, communication, ventilation, fire alarm and fire fighting in the shielding machine room. One end of the shielding machine room is left with 800mm installation and maintenance channel for equipment installation and maintenance.
(3) Shielding machine room body. Shielding machine room body for the steel plate all-welded hexahedron structure, from high-quality profiled steel pipe welding framework, high-quality cold rolled steel plate by welding to form a closed hexahedron. The bottom of the shielding room is 2.5mm, the sidewalls and the top are 2mm high-quality cold rolled steel plate using mature and advanced welding technology to ensure the sealing of the main body of the shielding room. And do strict anti-rust treatment, painted with two anti-corrosion paint.
(4) Electric shielding door. In order to facilitate the entry and exit of staff and equipment, an electric door with scratch card and password recognition access control system is installed on the main body of the shielding machine room. Its doorway size is 800mm × 18oomm (net opening). Electric door control system and key transmission components door, should open flexible, lightweight, beautiful and practical.
(5) insulation. The bottom of the shielding room using 80mm × 80mm dozens of insulating pads will shield the main body of the room and ground insulation.
2 sub-system
Shielding machine room for special professional equipment. Its internal various devices, equipment in the external docking must be special professional. "Filter" processing.
(1) power supply. Into the shielding machine room of electricity divided into utility power and UPS two ways. Are led through the power filter shielding machine room distribution box, and then divided for equipment, lighting, sockets, air conditioning and other electricity.
(2) signal transmission. Two optical fibers through a special fiber-optic over-wall device led to the shielding room, signal transmission should meet the requirements of shielding efficiency. Two-way telephone through the telephone filter leads to the shielded room to ensure smooth communication inside and outside the room.
(3) air conditioning and ventilation. According to the shielding room area and height, set up a special precision air-conditioning machine room. Inside and outside the room by special wave conduit connection. Ventilation, in the shielding machine room body **** set up ventilation wave guide window for air exchange inside and outside the machine room, to ensure fresh air in the machine room.
(4) lighting. The use of three-tube grille fluorescent lamps with 6 groups, the room has sufficient illumination.
(5) Fire alarm system. According to the area of the shielding room in the shielding room at the top of two smoke probes, through the fire alarm signal transmitter led to the outdoors and the building fire alarm host connected, when the smoke-sensitive joints in the room when there is smoke, the fire suppression system started.
(6) Fire fighting system. In the top of the shielded equipment room, through the fire over the wall device leads to a fire extinguishing gas pipeline, and set up the fire gas nozzle, in the fire extinguishing system starts, the nozzle in the shielded equipment room spraying fire extinguishing gas, to realize the automatic fire extinguishing.
(7) grounding system. Shielded room must have a good and reliable grounding, generally using a separate ground single point grounding, its grounding resistance ≤ 1 Ω. The grounding line must be separated from the lightning ground. Considering the actual situation of the project, the joint grounding method can be used to connect to the building ground network.
(8) Shielding machine room interior decoration. The top is made of porous aluminum alloy roof plate. Sidewalls are made of light steel skeleton, top mounted density board with aluminum composite board, and strive to be beautiful and practical. The floor is made of steel anti-static movable floor, which is strong, smooth, beautiful and without static electricity accumulation. Web Link