Talking about the problems of fire rolling shutter door in fire acceptance

1. The curtain plate coating falls off and rusts, and the curtain plate has obvious pressure pits, concave convex and penetrating holes. The rolling shutter is a complete fire protection product. If the shutter has problems, it will directly affect the fire resistance limit index of the rolling shutter.

2. The guide rail is deformed and the curtain board is stuck or falls unevenly. The fireproof rolling shutter door generally moves along the guide rail. If the guide rail is twisted or broken, the rolling shutter door will not be able to move to the specified position, which will not achieve the effect of fire separation.

3. On the roller shutter, the lower limit fails or the limit line is wrongly connected. This often happens on the fire roller shutter of the atrium. Because the fire roller shutter of the atrium is sometimes installed outside the walkway of the upper floor, there is no floor under the roller shutter to close it, and a large gap is leaked, so the fire separation of the upper and lower floors cannot be reached.

4. The operation does not act, the button contact is burned out, the circuit is blocked, or the curtain board can only go up or down, the phase is wrongly connected, and the top and bottom are reversed. Some fire rolling shutter doors are set on ordinary walkways or evacuation walkways, and people need to evacuate here, which requires a device to manually control the action of rolling shutter doors. If the device is damaged, unnecessary casualties and losses will be caused.

5. The upper or both sides of Henan fire rolling shutter door are not completely blocked or the fire resistance limit of the blocking material does not meet the requirements. This problem often occurs in the fire acceptance process. Generally, the construction unit or the roller shutter manufacturer installs the fire shutter door at the opening of the firewall and debugs it. There is no blocking above the motor of the roller shutter door or between the two sides of the roller shutter door and the guide rail, which causes hot smoke to pass over the motor that is not well separated, between the gaps on both sides of the roller shutter door and the guide rail, To the next fire compartment, resulting in a wide range of fire spread.

6. The owner installs stainless steel roller shutter and other products that have not been tested by the inspection agency. Because some units do not know about fire protection products, they think that as long as the steel rolling shutter door can achieve the effect of fire separation, but they do not know that the fire rolling shutter door has the functions of fire prevention, smoke prevention and heat insulation. When a fire occurs, the ordinary rolling shutter door either melts or cannot isolate heat and smoke.

7. The lifting speed of roller shutter does not meet the requirements. The specification requires that the average lifting speed of the fire rolling shutter door is 3 meters/minute. It is confirmed that sometimes a fire will occur during the fire acceptance process, and the fire linkage has started. However, the lowering speed of the rolling shutter door is too slow, and the whole process lasts for nearly 6 minutes or more. The hot smoke has already been sent to another fire compartment, The fire separation function of the fire rolling shutter door is completely unattainable.

8. The owner refits the rolling shutter door by himself. At present, many high-end places are blindly pursuing magnificence. They think that the fire rolling shutter door is too ugly. They have modified the fire rolling shutter door, such as adding decorations under the floor, which makes it unable to drop to the ground; Another example is that due to the lack of space, the distance between the dual track and dual curtain inorganic composite fireproof roller shutter rails is compressed, which leads to the failure to meet the original fire resistance limit requirements of the product. These seem to be minor changes, but they reduce the fire separation effect of the roller shutter door.

9. There is no dead weight falling device or the device is inconvenient to operate. Henan fire rolling shutter door has four lowering modes: fire linkage electric control lowering, manual electric control lowering, chain manual pulling lowering and dead weight dropping device. Some units cut corners during construction and do not install this device to gain benefits.

10. The dead weight closing mechanism fails, and the roller shutter cannot stop or has no constant speed performance. At present, many units that install fire rolling shutter doors only install the deadweight closing mechanism without testing. During fire acceptance, the deadweight closing mechanism often starts, but the rolling shutter door does not drop.

11. The fire shutter on the evacuation passageway and exit is not equipped with control buttons on both sides, and has no central delay function. It is only lowered by the linkage of the smoke detector. These three situations also often occur during fire acceptance, and the reason is also due to jerry building during construction.

12. The fire shutter door is only linked by a detector on one side or by a group of detectors across the fire shutter. When debugging the fire rolling shutter door, errors often occur, and the linkage logic program of the rolling shutter door is written incorrectly, which causes the rolling shutter door cannot be started according to the specification requirements.

13. Fire power supply is not used for fire rolling shutter door. Some units mistakenly connected the general lighting power supply to the rolling door power box when installing the rolling door, which caused the power supply of the rolling door to be cut off when the fire linkage started, and the rolling door could not be lowered.

14. The threading of the power control line of the fire shutter door does not meet the requirements, the wire is exposed or only covered with a yellow wax pipe, and the exposed metal pipe does not take fire protection measures as required. According to the requirements of the specification, the exposed fire pipeline shall pass through the metal pipe and be coated with fireproof paint. Some installation units often forget or omit this process.

15. The basement is poorly ventilated, and the surface of inorganic cloth of double track and double curtain inorganic composite fireproof roller shutter is seriously damaged. The current underground garage in China is not well ventilated and drained, which results in excessive moisture in the basement. Under this condition, the surface of the inorganic cloth will be corroded and then damaged, and the integrity of the rolling shutter door will be damaged, unable to achieve the effect of fire separation. To sum up, there are so many problems in the installation and commissioning process of the fireproof roller shutter that the installation and commissioning unit should pay attention to it. The commissioning is normal according to the technical standards, so that it can really play a role of fire separation.