屏蔽室屏蔽房技术方案（Techn...

屏蔽室屏蔽房技术方案（Technical scheme of shielding room
shielding room）
Technical scheme of shielding room shielding room
1. Structure: single - layer steel - mounted electromagnetic shielding chamber
Ii. Performance indicators
14 KHZ 70 db or higher magnetic field
200 KHZ or 100 db
The plane wave 1 MHZ to 300 MHZ or 100 db
300 MHZ ~ 1 GHZ 100 db or higher
Microwave 1 GHZ - 10 GHZ 80 db or higher
The test method is standard gb12190-90.
The relevant national and industry standards for the design of this project:
1. National standard gb50174-93 "design specification for electronic computer room"
2. National standard gb30003-93 "specification for construction and acceptance of electronic computer room"
3. National standard gbt16-87 "fire prevention code for interior decoration design"
4. National standard gb6650-86 computer room activity floor technical requirements
5. National standard gbj32-82 "safety engineering construction and acceptance specification of electrical installations"
6. National standard gbj19-87 "design specification for heating ventilation and air conditioning"
7. YD/t754-95. Electrostatic protection of communication machine room
8. Gb872-88 "electromagnetic radiation protection rules"
GGB - 12190 "measurement methods for shielding effectiveness of high-performance shielding rooms"
10. Regulations on the protection of computer information system of the People's Republic of China
Introduction to electromagnetic shielding room
Computer, communication machine and electronic equipment in normal work will produce a certain intensity of electromagnetic wave, the electromagnetic wave may produce interference to other equipment or received by special equipment, in order to steal its work content. At the same time, these electronic devices also need to ensure their normal work under a certain
intensity of electromagnetic environment.
Shielding is to make a hexahedron with a sheet metal (metal mesh) to limit the electromagnetic wave to a certain space and the energy from one side to the other is greatly attenuated.
Shielded enclosure is to use the principle of the block is made of metal material is a hexahedron room, because the metal plate (network) of the incident electromagnetic wave absorption loss, interface reflection loss and plate internal reflection loss, make its electromagnetic energy greatly abate, shielding effect and make the shielding room.
Shielding performance of shielding chamber is considered for shielding effectiveness.
S = E0 / E1 or S = H0 / H1
S -- shielding effectiveness
E0 (H0) -- the electric field intensity of a point in space without a shield (magnetic field intensity)
E1 (H1) - the electric field intensity (magnetic field intensity) of the shielded space at that point when there is a shield.
In the calculation of shielding effectiveness and tests, often will encounter field strength value difference signal (up to thousands of one million times), in order to facilitate calculation and expression, usually in logarithmic units -
decibels (dB) measurement. Is defined as
SE = 20 lg E0 / E1
SH = 20 lg H0 / H1
Because of the shielding room usually with personnel and equipment work inside, thus shielding room six sides sealed at the same time, the necessary of personnel and equipment in and out of the door, good ventilation, indoor the required power supply, signal in and out, essential interior decoration, to ensure that the shielding chamber can work normally.
Therefore, the main factors influencing the shielding effectiveness of the shielding chamber are:
Material used for shielding Chambers
The seam of the shielding material is treated
Platform screen door
Ventilation window
Shielding window
Filter processing of power line
Shielding of signal lines
(1) shield: the contents of the shielding shell consist mainly
of the six surface shielding materials, the links between the materials, and the support keel.
Shielding material: when the shielding material adopts metal plate, its shielding effect:
The At t = 8.68 / delta + 20 lg {(Z0 + Z3) by 2/4 z0zs} decibels
It can be seen from the above formula that when the material and thickness of the metal plate are known, the shielding effect can be calculated at different distances, different frequencies and different fields.
Composition of content
1. Shell: the insulation between the six panel body and the shell and the ground;
The plate body is made into a unit mould by a single mold pressure of 500T oil press by a cold-rolled steel plate with a thickness of 1.5mm thick
Block, galvanized static plastic after the assembly; The spray surface is light grey; All joints of the shield plate module are connected
A 2 - layer stainless steel wire lining (increased conductivity) is used for sealing. At the same time, the joints are specially designed for 60 x 25
Zinc - plated single - eye gasket, copper mesh soft gasket and
standard fastener M8 x 25 mm galvanized hexagonal screw
Tighten the hex nut to ensure the performance of the shell.
This assembly and disassembly process is very good for the user's removal and expansion.
Outer dimensions of the shell: 2.7 m x 2.7 m by 2.3 m Indoor net size: 2.4 m * 2.4 m * 2.0 m
Actual installation diagram of the wall panel of the shielding chamber shell:
"Screen inside and outside" (for reference only)
"Screen outdoor photos" :
"Shield section profile sketch"
2. Shield door: manually lock the shield door one
Door hole size: 1.9 x 0.85 (m)
(1) using hinged interlocking closed shielding door;
(2) single - knife insertion type electromagnetic sealing technology, composite blade, detachable quality beryllium bronze reed, good maintenance;
(3) the elastic spring material is beryllium bronze, (Qbe2) and
the thickness is 0.15mm, which must undergo vacuum heat treatment to increase its conductivity, elasticity and fatigue resistance.
(4) door panels are made of stainless steel drawing board.
3. Filter:
The power supply filter should be configured for every power cord in the entrance screening room. Currently, the power filter with low leakage current is widely used. The insertion attenuation value is consistent with the shielding chamber.
All power filters should be installed, and the front end of the filter shall not have a flow protection device but can set up an overload protection device.
The data signal filter can be used to enter the shielding chamber.
Power filter 220V 50Hz 16A
(shielding indoor branch wiring - equipment power and socket, lighting, fan)
4. Cellular ventilation waveguide window 300 x 300mm: 2
Ventilation waveguide window inlet and outlet are equipped with ventilation fans;
(1) the insertion attenuation should be consistent with the
shielding chamber index, the waveguide is composed of many small waveguides, and the waveguide section is of a hexagonal shape.
(2) the waveguide is composed of vacuum brazing new process.
Indoor electrical
One of the main distribution boxes
(including total circuit control and socket, lighting control)
Four incandescent bulbs
Lighting switch two groups
Cable routing and tube design requirements
Wall outlets are required by the user
The design and installation of indoor electrical appliances can meet the following requirements:
(1) a 1500VC withstand pressure test was conducted between the shielding chamber power supply system and the shielding chamber wall.
(2) the power supply into line with shielding room wall insulation resistance and insulation resistance between wire and wire is greater than 2 m Ω
Interior decoration: (interior decoration material meets environmental requirements)
Top: ceiling keel and microporous aluminum plate
Wall: light steel-keel + bo-magnesite board + double-faced plastic aluminum plate
Ground: active bracket + all steel anti-static activity floor
(1) the ceiling
1. The lifting top light steel keel and accessories adopt the national standard products, and the ceiling is made of silver and white microporous aluminum plates (300 x 300mm).
2. Installation of fixed lighting fixtures, tuyere and various pipe lines on the ceiling, each system will not interfere with each other.
3. The top of the ceiling can be removable to facilitate maintenance.
4. The ceiling keel, the spacing of the lifting rod and the proper arrangement, the keel is straight, the lifting point is arranged reasonably, the top surface is good. The ceiling is coordinated with the design of the elevated floor and the separation module.
(2) the metope
Using 30? 4mm silver and white double-sided aluminum plastic sheet layer (lucky aluminum plastic sheet); Fireproofing, wipes and durability.
(3) the ground
1. The panel adopts 600 * 600mm all-steel anti-static activity floor, and the insulation resistance of floor floor is usually wet under normal temperature. 100 k? Uniform load? 1000 kg/m
2.
2. The floor rack is 150mm high.
3. The floor fire resistance, sealing, heat insulation and other conform to iso 834 and related standards,
Iv. Production cycle
The contract will take effect in 20 days and the installation period will be 5 days.
V. responsibilities and cooperation of both parties
(I) the project that the buyer is responsible for:
1. The configuration of the outdoor strong and weak current system and the corresponding position of the shielding chamber.
2. Provision of temporary electricity and necessary construction convenience shall be provided when installing the shielded room.
3, provide shielding room ground and location to shield room regulations, grounding resistance less than or equal to 1 Ω;
(ii) projects in charge of the supplier:
1. Guarantee of the design, manufacture, installation and shielding chamber of the shielding chamber.
2. The supplier's installation personnel shall comply with the relevant regulations and regulations of the buyer, and do a good job of fire safety.
Vi. Delivery and acceptance
1. After the completion of the project, we shall carry out the debugging and delivery of the shielding room to party a;
2. The official inspection of the shielding room shall be conducted by us in charge of arranging the statutory test units, and shall be responsible for the inspection and acceptance within 15 days. The expenses shall be borne by the buyer.
3. After acceptance, the project shall be confirmed to meet the contract requirements and can be delivered.
7. Engineering warranty and service
1, engineering activities parts warranty for one year, other warranty five years (in) from the date of acceptance, the warranty period engineering failure is responsible by the supplier free maintenance (including the required spare parts
fee, transportation, accommodation).
2. After the warranty period, the supplier shall be responsible for the maintenance service.
Other instructions:
1. The front of the shielded room power filter can not connect the leakage protection switch, but can connect the overload fuse, automatic circuit breaker.
2. The supplier shall strictly observe the relevant working system of the buyer.。