Generation of static electricity in computer room
The static electricity in the computer room of communication equipment is mainly formed by two objects with different charging sequences contact out by rubbing, colliding and peeling, and then gathering positive charges on one object and equal negative charges on the other. This is because when two different objects are in close contact, their outermost electrons have different work functions, and electrons escape from the object with a smaller work function to the object with a larger work function. In addition, conductor electrostatic induction, piezoelectric effect and electromagnetic radiation induction can also produce high electrostatic voltage.
Harm of static electricity in computer room
The static electricity in the computer room will not only cause random failures, misoperation or operational errors when the computer is running, but also lead to the breakdown and destruction of some components, such as CMOS, MOS circuits and two-stage circuits. In addition, static electricity also has obvious influence on the external equipment of the computer. When the display device with cathode ray tube is disturbed by static electricity, the image will be disordered and blurred. Static electricity can also lead to the failure of modems, network cards and fax machines, as well as the abnormal printing of printers.
The problems caused by static electricity are not only difficult for hardware personnel to find, but also sometimes software personnel mistakenly think that it is a software fault, resulting in confusion in work. In addition, when static electricity is discharged to computers or other equipment through human body (so-called striking fire), when the energy reaches a certain level, it will also give people the feeling of electric shock (for example, sometimes touching the computer monitor or chassis will have obvious electric shock feeling).
Basic principles of electrostatic protection in computer room
1. Restrain or reduce the generation of static charge in the computer room, and strictly control the static power supply.
2. Timely, safely and reliably eliminate the static charges generated in the computer room to avoid the accumulation of static charges. Electrostatic conductive materials and electrostatic dissipative materials leak to the ground through a certain path within a certain period of time; Neutralization method represented by ion electrostatic eliminator is used in insulating materials, so that the electrostatic charge accumulated on the object attracts the opposite charge in the air and is neutralized and eliminated.
3, regular (such as a week) for the maintenance and inspection of anti-static facilities.
Main categories of anti-static floor in computer room
Anti-static straight floor: Anti-static straight floor is generally divided into high anti-static floor, straight anti-static floor and anti-static floor.
1, high antistatic floor
Composite anti-static floor sample rack High anti-static floor is generally divided according to the difference of base material and veneer material. The base materials are steel base, aluminum base, composite base, particleboard base (wood base), calcium sulfate base, etc. Veneer materials include anti-static tiles, melamine (HPL), PVC, new PVC and so on.
Common ones are: all-steel anti-static floor, composite anti-static floor, aluminum alloy anti-static floor, carbon steel anti-static floor and its ventilation board.
Scope of application of high anti-static floor:
Anti-static raised floor is mainly used in computer room, data processing center, laboratory, microwave communication station room, program-controlled telephone exchange room, mobile communication room, satellite ground station room, radio control room, TV transmitting station control room, broadcast control room, monitoring room and central control room.
2, straight anti-static floor
Directly laid anti-static floor is generally divided into: directly laid PVC anti-static floor and directly laid anti-static floor tile.
2. 1, straight PVC antistatic floor
Using the electrostatic conduction network formed between plastic particle interfaces, it has permanent antistatic function, and the surface looks like marble, which is very flexible and uniform in structure. It is composed of colored polyvinyl chloride (PVC) sheets coated with special conductive liquid, and made into solid PVC blocks by electrostatic extrusion, thus obtaining the final antistatic floor with good decorative effect.
Scope of application of PVC antistatic floor:
A. assembly/manufacturing/research and development.
B, telecommunications industry; A laboratory/computer room.
C, the field of medical care; Operating room/emergency room/hospital intensive care unit/medicine/medicine/biotechnology industry.
D. business and industrial environment; Clean the room floor, etc.
2.2, straight anti-static ceramic tile
In the process of firing ceramic tiles, antistatic powder is added for physical modification, so the antistatic performance is very stable, and the resistance value is between the 6th power of 10 and the 9th power ohm of 10, which is convenient for construction and can be laid by ordinary Plaster workers.
Adding aluminum foil or copper foil under the floor can better enhance the conductivity.
Its advantage is stable antistatic performance. This kind of floor is a national patent product, which is green and environmentally friendly (belonging to green building materials). It has high wear resistance (0. 1g/ 1000 rpm), aging resistance, long service life (more than 30 years), A-class fire resistance and low water absorption (
Main technical indicators:
Conductivity: the sixth power of surface resistance 10? 10 9 ohm antistatic ceramic floor
The seventh power of volume resistivity 10? 10. 10 ohm/cm
Fireworks resistance: not less than 1600℃
Wear resistance: 0. 1g/ 1000 rpm.
Water absorption:
Extreme cold and heat resistance: 15℃- 105℃
After 10 rapid cooling and rapid heating cycles, no obvious cracks appeared.
Bending strength: the average value is not less than 27Mpa.
Warp:? 0.5%
Floor specification: 600? 600? 10mm
3. Anti-static floor
Features: a, excellent and lasting antistatic effect, not affected by time, temperature and humidity;
B, solvent-free high-grade epoxy resin and high-quality curing agent are selected;
C, the surface is smooth, beautiful and moisture-proof, achieving a mirror effect;
D, acid, alkali, salt, oil medium corrosion resistance, especially strong alkali resistance;
E. Wear resistance, pressure resistance, impact resistance and certain elasticity.
Construction technology of anti-static floor;
A, base surface treatment B, sealing primer C, copper wire laying, groove cutting D, and conductive intermediate paint scraping.
Floor installation and laying tools
1, marble cutting saw;
2. laser levels and network laser scanner;
3, bubble level, tape measure, chalk line;
4. Plate absorber, nut adjusting handle and cross screwdriver;
5, vacuum cleaner, broom, mop;
6. Talcum powder, foam plastic strips, wood strips, rubber strip, aluminum profiles, angle irons, aluminum angle irons and other materials should meet the requirements.
Construction steps of anti-static floor in computer room
1. Carefully check the flatness of the ground and the verticality of the wall. If major defects are found or local modifications are needed, they shall be submitted to the relevant departments of Party A;
2, pull the horizontal line, use chalk line to bounce the floor installation height to the wall, ensure that the laid floor is at the same level, measure the indoor length and width, and select the reference position, and pop up the grid of the installation bracket on the ground to ensure that the floor is laid neatly and beautifully, while minimizing the cutting of the floor;
3. Adjust the bearing to be installed to the same required height, and place the bearing at the intersection of the ground grid lines;
4. Fix the truss beam on the bracket with mounting screws, and calibrate the truss beam one by one with a spirit level and a square ruler to make them in the same plane and perpendicular to each other;
5. Place the movable floor on the assembled truss beam with a plate absorber;
6. If the remaining size near the wall is less than the length of the raised floor, it can be repaired by cutting the floor;
7. When laying the floor, level it layer by layer with a bubble level. The height of the raised floor is adjusted by the adjustable bracket. In the process of laying, handle it carefully to prevent scratching the floor and damaging the edge. At the same time, it should be cleaned when laying to avoid leaving debris and dust under the floor.
8. When installing heavy equipment in the computer room, bearings can be installed under the floor of the equipment base to prevent the floor from being deformed;
9. When the 9.HPL decorative board needs to be cut or processed, the concave corner of the opening should be made. 6~? 8 crack stop holes to prevent the processed decorative surface of the floor from cracking.
Maintenance and maintenance of anti-static floor in computer room
1, using environment:
The environmental control requirements of anti-static floor room are: 15℃ ~ 35℃ and relative humidity: 45% RH ~ 75% RH；;
2. Decorate the floor:
1) It is forbidden to directly construct sharp and sharp-edged instruments on the decorative surface of the raised floor to prevent the antistatic performance and aesthetics of the decorative surface from being damaged;
2) During use, it is forbidden to jump directly from a height to the anti-static floor, and to move things roughly to damage the floor;
3) When carrying articles on the raised floor, it is forbidden to directly push objects on the board surface, so that the objects directly rub the ground and cause scratches on the board surface;
4) When carrying articles, use a trolley with rubber tires to carry them or lay an isolation pad between the outline of the object and the floor to prevent the board from being damaged;
5) When placing heavy objects on the anti-static movable board surface, they should be placed stably to avoid damaging the anti-static floor;
6) When maintaining the equipment in the lower floor space, install a floor absorber on the floor, and be careful when disassembling and putting down the floor to avoid damaging the anti-static floor;
(7) During use, clean mops and rags can be used to keep the board clean. Be careful not to spill a lot of liquids such as water and detergent on the floor, so as not to affect the service life of the anti-static floor and the normal operation of the lines and equipment under the anti-static floor;
3. Bare floor and ventilated floor
(1) During use, the anti-static plastic spraying layer of the raised floor should be prevented from being scratched. If scratches are found, gray paint should be painted to ensure the integrity of the coating.
(2) Prevent small objects from falling into the vents of the ventilated floor (such as coins, keys, paper clips, pins, etc.). ) to avoid damage to the ventilation regulator and other equipment.