Closing force of 3C fire damper blades
The closing force of the 3C fire damper valve also has an effect on the air leakage at its ambient temperature. The closing force of the blade is too small, which results in the lack of tight adhesion between the blades after the valve is closed. The excessive closing force of the blade may result in the phenomenon of springback in the valve closing process, and the two closure will leave gaps between the blades.
The closing force of the 3C fireproof valve is mainly related to the spring. The quality of the spring, the quantity of usage and the angle of installation will affect the closing force of the blade. The spring is usually installed on the side of the valve body. During the type test, the air leakage quantity of the fire valve under ambient temperature is tested after closing the reliability test and the corrosion resistance test. The valve used in Luzhou should also have certain corrosion resistance. If the quality of the spring itself is poor, it will pass the reliability test and corrosion resistance test. After testing, the elastic force of the spring will decrease, and the closing force of the blade will be reduced, which will cause the volume of the leakage of the valve to be too large or even exceed the standard.
What kind of environment is the fire damper normally used?
What kind of environment is the fire damper normally used?
Air supply, including ventilation, such as fresh air and exhaust, has a wide range, such as factory workshop, production site air, due to the production of harmful gases need to be discharged from the outside, and the need for outdoor air to the room. At this time, we need to use large and low pressure air conveying pipes. The spiral fire damper is very suitable. In general, galvanized iron pipes are used, corrosive stainless steel pipes are used in special damp places.
Send a cold wind. The most common is the central air conditioning pipeline, this piping needs to add the heat preservation material. The spiral fireproof valve can be attached with thermal insulation material and looks beautiful.
The smoke exhaust fire damper is mainly used for ventilation pipes and air conditioning systems, and is usually in a "normally open" state. When the air temperature reaches 70 degrees centigrade, the fuses are automatically closed by the fuses in the valves.
The smoke outlets and exhaust valves are mainly installed on the pipes of the exhaust system or installed at the suction outlets of the fire smoke exhaust fans, and are usually closed.
1. Location of 3C fire damper
1, 3C fire damper can usually be installed on the main air duct of air conditioning equipment, such as fresh air units, air conditioning units, etc.
2. It can be installed in the air passage through the fire compartment.
3. It is installed in the wind tunnel crossing the expansion joint of the building structure.
4, when the air duct is unable to prevent, passing through the workshop or room where Yi 1 burns.
Two, 3C fire damper operation and installation principle
The top of the fuse core usually clamped the fork on the valve shaft (vane shaft) to keep the valve in a normal open state. When a fire occurs, the airflow temperature in the pipe rises to the fusing fuse piece, that is, the spring propelling core rod, the fork plate is removed, and the valve shaft is rotated by the torsion spring to close the valve.
The device works in the central air conditioning duct system. The working principle is the temperature control of the extremely fusible alloy, and the valve is closed by gravity action and the spring mechanism. When the fire breaks out, the professional CCC fire damper is complete in specifications, the flame enters the 1 invasion air duct, and a large number of wholesale automatic fire damper specifications are complete. The high temperature melts the fusible alloy on the valve, or causes the memory alloy to deform, and automatically closes the valve. Normally, if the air volume is large enough to be adjusted, the valve opening can be adjusted by the handle connected with the valve shaft (vane shaft). When the request is arrived, the butterfly mother will fix its position. A ring tooth is arranged at the contact between the handle and the fork plate, so as to avoid sliding engagement and keep the valve open after adjusting.
Fire damper is an important component of ventilation, air conditioning and smoke control system. What are the important functions of the fire control system? Here is a brief introduction to the important role of smoke exhaust 3C fire damper.
3C fire-fighting valve is used to block smoke and flame passing through the fire area. It is specialized in supplying circular fireproof valves with fair price, and can meet the requirements of fire resistance and fire resistance requirements within a certain time. In order to reduce the loss caused by fire to a minimum level, effective fire prevention and smoke control measures must be taken to control the spread of fire, and the reasonable setting of fire damper in ventilation, air conditioning and smoke control system plays an important role.
On the air duct of the air conditioning system, the purpose of installing the fire damper is to cut off the airflow quickly when the fire breaks out and avoid the fire spreading. When the fire is present, the air channel is affected by the surrounding temperature and the temperature rises. When the fire reaches a certain temperature in the wind channel, the fusible piece is fused, and the valve plate which is joined by the fusible sheet is then disconnected from the fusible sheet and closed to prevent the air flow from passing through. In order to stop the air supply to the system and the electrical signal and chain installation on the fire damper, the valve plate will be sent off when it is closed, so that the fan will stop running.
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