详情描述

Project Name and Quantity:Assembled shielding chamber

The shield room can be configured to bear both top and bottom forces based on the site conditions, thereby reducing the weight on the ground scale.

2. Technical Requirements

I. Basis:

"Method for Measuring the Shielding Effectiveness of High-Performance Shielding Rooms" GB/T 12190-2021

2. "General Technical Requirements and Testing for Shielded Rooms" GJB 20219-94

3. "Engineering and Acceptance Standard for Shielded Room Construction" SJ31470-2002

4. "Code for Design of Electronic Computer Rooms" GB50174-93

5. "Safety Requirements for Computer Room" GB9361-88

6. "Technical Requirements for Computer Rooms" GBGR 2887-2000

7. "Technical Requirements and Measurement Methods for Electromagnetic Shielding of Confidential Information Processing" BMB3-1999

8. Standard for Design and Special Technical Specifications of Automatic Fire Alarm Systems - GB50116-98

9. Relevant electromagnetic compatibility (EMC) technical principles and current regulations for national security

II. Performance Specifications:

Section 3: Structural FormSheet steel assembled shielding room

Shell: Four wallsThe panels are made of double-layered unit modules from δ=1.5mm thick galvanized steel sheets (decoration-free for indoor wall surfaces). The floor and ceiling are constructed from single-layer δ=1.5mm thick galvanized steel sheets to form shielding modules, which are assembled using M8 bolts, nuts, washers, and conductive gaskets after electrostatic powder coating.

2. Electric Shielding DoorDoor Opening Size: 1900mm x 900mm; The shielding door employs a design that simultaneously tightens and contacts the door frame copper plate with two rows of spring strips and a plug knife opening to ensure the shielding effectiveness meets the requirements.

3 .Ventilation Wave Guide WindowThe ventilation system of the shielding room employs a specialized waveguide window, whose insertion loss corresponds to the shielding room's technical specifications. It consists of a waveguide bundle made up of many small waveguides, with a hexagonal cross-sectional shape. Under the same insertion loss capacity, the hexagonal waveguide has a larger passage area than a square waveguide, thereby increasing the ventilation area and reducing the air exchange resistance.

The ventilation for the shielding room's inlet and outlet air is achieved through an exhaust fan using cutoff waveguide windows. Cutoff waveguide windows are pre-installed at designated locations on the shielding shell,焊接 to the shell, and a flanged decorative frame compatible with the exhaust fan is made. The indoor air outlet is decorated with an aluminum alloy louver.

4 Filters

The filter is composed of three sections of high-frequency filters connected in series. Each section is well-shielded, and adjacent sections are coupled with through-core capacitors to achieve good characteristics. The waveguide connector (mounted using a hollow screw) is designed according to the principle of waveguide filters, preventing the reduction of shielding effectiveness by drilling holes in the shielding room walls. It effectively suppresses electromagnetic waves below 3CM. This filter is a two-wire system filter, and in principle, each pair of wiring should be connected to a filter, i.e., one for single-phase AC circuits. Filters are generally installed at the top and side walls of the shielding room. To isolate the coupling effect between the input and output ends of the filter, the output lines should be brought into the shielding room, while the filter should be placed outside. To ensure the filter's attenuation performance, there should be a reliable electrical contact between the filter housing and the shielding room's metallic walls. The filter must be installed in a dry and well-ventilated location.

Installation sequence of the filter

Pre-drill holes at the filter installation location in the shielding room.

(b) Thread the waveguide connector through the hole into the interior, then secure the nut to the shielded wall (copper mesh or steel plate) indoors.

(c) The outdoor power input is connected to the filter's wiring, while the indoor power is derived from the waveguide connector and connected via the wiring. When wiring, the red wire corresponds to the phase wire, and the yellow wire corresponds to the neutral wire.

5. Grounding Device:A 10 square grounding wire is drawn from the shield room housing and connected to the equipotential grounding rod.

6 Indoor Electrical Equipment:Distribution boxes, LED lighting fixtures, and multi-purpose power outlets. To ensure stable operation of the shielding room and minimize malfunctions, electrical materials must be strictly selected from renowned brands that comply with national standards. The routing of cables and installation of switches and outlets are arranged according to customer requirements.

7 Interior Decoration:Ceiling: Micro-perforated aluminum panel + Floor: Color steel plate + Gypsum board + Anti-static floor + Skeleton