Smoke fire damper and smoke fire damper only one word difference, but also this word difference led to their differences, below, let's look at the differences between the two in detail.
Smoke fire damper is mainly used in mechanical smoke exhaust system. It is a 280 ℃ fire damper, which is usually closed. In case of fire, it is actively opened by fire active alarm linkage signal. It has manual actuator together, which can be manually opened or remotely opened in the fire control center (I .e. linkage control, manual control and active control). It is generally installed at the smoke exhaust port and the air duct passes through fire prevention, the partition of the smoke prevention zone and the air duct of the smoke exhaust machine room shall be closed when the temperature of the smoke in the air duct reaches 280 ℃.
Smoke fire dampers are mainly used in ventilation and air conditioning systems. Smoke fire dampers are generally installed at the fire separation of ventilation system and air conditioning system room. They are 70 ℃ fire dampers. They are usually open. When the smoke temperature in the air duct reaches 70 degrees, they are actively closed. The control method is active.
The smoke exhaust fire damper is normally closed on the pipeline, and the smoke in the house will not open until it reaches a certain concentration, and then close it when it is 280 degrees Celsius.
Smoke and fire dampers are normally open on the pipeline for ventilation. Fire dampers are installed in the center of the air duct. At 70 ℃, if a fire occurs, the air duct can be blocked, which has two effects. One is not to transport air to the fire site to prevent combustion. The other is to prevent the fire source from dispersing from the air duct to other places and to actively close when a fire occurs.
The concept of fire damper and smoke exhaust fire damper refers to a valve installed on the air supply and return pipes of ventilation and air conditioning systems, which is usually open. When the gas temperature in the pipe reaches 70oC during fire, it is actively closed, and can meet the requirements of fire stability and fire integrity at a certain time, and has the effect of smoke isolation and fire prevention.
Smoke fire damper refers to the valve installed on the smoke exhaust system pipeline, which is usually open. When the gas temperature in the pipeline reaches 280oC, it is actively closed when the gas temperature in the pipeline reaches 280oC, and can satisfy the requirements of fire stability and fire integrity at a certain time, and has the effect of smoke isolation and fire prevention.
The effect of fire damper is a messy air supply and smoke exhaust system with complicated pipelines. In the air supply system, the air sent by the blower must be distributed to each branch pipe through the main pipe. In the exhaust or smoke exhaust system, the air or smoke is collected from each branch pipe into the main pipe and then enters the exhaust fan for discharge. Then, if there is no obstruction in the air supply system or the smoke exhaust system, the fire damper, the air supply volume and smoke exhaust volume cannot be controlled. Parts that do not require air supply or smoke exhaust present a large amount of air supply and smoke exhaust, while parts that require air supply or smoke exhaust do not supply air, smoke exhaust or only a small amount of air supply and smoke exhaust. In order to block pipelines that do not require air supply and smoke exhaust, valve equipment is required.
In addition, although the air volume of each part of the air supply and exhaust system has been accounted for by the pipeline and the corresponding pipeline planning, on the one hand, there is a certain error between the theoretical accounting and the actual situation, on the other hand, the operating conditions of the system are constantly changing, so it is necessary to adjust the air volume of each part of the system, which requires valve equipment.
In addition, some ventilation equipment, such as centrifugal fans, is best started with no load. Because the starting current of the motor is the smallest and is beneficial to safety, it is necessary to block the system pipeline before starting. When the inlet and outlet of the fan are equipped with switches, the inlet or outlet is generally closed. If the inlet and outlet are not equipped with switches, it is necessary to control through valve equipment.
Fire dampers and smoke exhaust fire dampers are set up on the pipes of ventilation and air conditioning systems, and smoke exhaust fire dampers are set up on the pipes of smoke exhaust systems to prevent the transmission of high-temperature toxic smoke during fire, which will cause the spread of fire and the aggravation of toxicity.
1. In one of the following conditions, the air duct of the air conditioning system shall be equipped with fire dampers:(1) the pipe passes through the partition wall of the fire compartment,(2) the pipe passes through the ventilation, air conditioning room and the partition wall and floor of the important or high fire risk room,(3) the horizontal pipe section at the junction of the straight air duct and each layer of horizontal air duct (4) the pipe passes through both sides of the deformation joint.
The above parts of the fire valve, when the temperature of the gas in the pipeline in the fire reaches 70oC, the active closure.
2. Separation of smoke exhaust system:(1) In the population of the smoke exhaust room, a smoke exhaust fire damper that can be actively closed when the smoke temperature exceeds 280oC shall be set up. The smoke exhaust machine shall ensure that it can operate continuously for 30min at 280oC; (2) A smoke exhaust fire damper that can be self-closed when the smoke temperature exceeds 280C shall be set up on the smoke exhaust branch pipe.
Expand the significance of this study fire damper, smoke fire damper as building fire prevention, smoke control system is an important part of its quality is directly related to the success or failure of the system set, the relationship between building fire safety and personnel dispersed security.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures