What information do you need to know about the product when purchasing a fire smoke exhaust fan?

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Fire smoke exhaust fan, the importance of smoke exhaust fire damper Fire doors are already very familiar to everyone, so what is the function of fire dampers? In fact, there are still many people who don't know about this. It can be automatically closed when the gas temperature in the pipeline reaches 70 degrees Celsius in the event of a fire, and the valve that plays the role of smoke isolation and fire resistance within a certain period of time prevents the fire from spreading to other places through the ventilation pipeline, which can effectively prevent the spread of the fire.

However, because the fire damper is installed in the middle of the ventilation duct and is usually invisible, many people ignore its role. The smoke exhaust fire damper is installed on the smoke exhaust system pipeline, which is usually open, and automatically closes when the gas temperature in the pipeline reaches 280oC during the fire, which can meet the requirements of fire resistance stability and fire integrity within a certain period of time. It is a valve that plays the role of smoke and fire resistance.

Separation of smoke exhaust system: (1) At the population of the smoke exhaust machine room, a smoke exhaust fire damper that can be automatically closed when the flue gas temperature exceeds 280oC is installed. The smoke exhaust machine should ensure that it can work continuously for 30min at 280oC; (2) Set up a smoke exhaust fire damper that can close by itself when the flue gas temperature exceeds 280C on the smoke exhaust branch.

In addition, the correct installation of the fire damper will also affect the normal use of the fire damper. It is reported that the current production and installation of fire damper manufacturers are different, the installation of the engineering team technology is uneven, and a considerable part of the installation engineering team units do not have professional skills, they often use some compulsory means when installing, which will lead to product deformation, so that the function of the product is lost or weakened. Such a facility is very important for personal safety, and no matter who you are, you should pay more attention to its awareness.

The air volume of the smoke exhaust fan shall comply with the following provisions:

1) When undertaking a smoke-proof partition or a room with a clearance height greater than the smoke-proof partition, it should be calculated according to the area of not less than 60m3 h per square meter (the minimum smoke exhaust volume of a single fan should not be less than 7200m3 h.

2) When undertaking smoke exhaust in two or more smoke-proof zones, it should be calculated according to the maximum smoke-proof zone area of not less than 120m3 h per square meter.

3) When the volume of the atrium is less than 17000, the smoke exhaust volume is calculated according to the 6 hours of ventilation of the volume; When the volume of the atrium is greater than 17000, its smoke exhaust volume is calculated according to 4 hours of ventilation of its volume; However, the minimum smoke exhaust volume should not be less than 102000m3 h.

4) For smoke-proof stairwells and their front rooms of high-rise buildings with podiums, front rooms of fire elevator rooms or shared front rooms, when the upper parts of the podium use openable external windows for natural smoke exhaust, and the podium part does not have natural smoke exhaust conditions, local mechanical smoke exhaust facilities shall be set up in the front room or the shared front room, and the smoke exhaust volume shall be calculated according to the front room of not less than 60m3 h per square meter.

1. The bus module control can be controlled manually and automatically.

2. According to the specification, each fan must also use multi-line control: multi-line control panel is usually used for remote control, and multi-line control is a pair of control of fire linkage facilities.

1. Point-to-point control loop, multi-line control is used for manual control by the host control room, and the multi-line control of some manufacturers can also participate in the linkage.

There are three control methods for fire smoke exhaust fans:

1) Fire linkage control starts;

2) On-site manual operation control start;

3) 485 remote network operation control start;

The control mode of fire smoke exhaust fan equipment is realized by the smoke prevention fan controller, which is divided into single speed (GYXF2000-1DF) and double speed (GYXF2000-1SF).

GYXF2000-1DF single-speed fan controller is a product designed to meet the requirements of smoke prevention fan control equipment and GB16806-2006 standard, which is used for logic operation, automatic remote signal processing, contactor drive, voltage and current display and load overload protection in smoke prevention and exhaust fan control equipment, and is suitable for logic control in the single-speed fan control cabinet.

gyxf2000-1df

GYXF2000-1SF two-speed fan controller is a product designed to meet the requirements of smoke prevention fan control equipment and GB16806-2006 standard, which is used for logic operation, automatic remote signal processing, contactor drive, voltage and current display and load overload protection in smoke prevention and exhaust fan control equipment, and is suitable for logic control in the two-speed fan control cabinet.

gyxf2000-1sf

The principle of this commonly used smoke exhaust fan control box is in the 10D303-3 atlas.

Generally, the remote control is start and stop, multi-line linkage start and stop, and fire linkage start.

1. Manual: the fire control room is controlled by the straight cable to start and stop;

2. Automatic control: triggered by the alarm signal, the fire linkage controller controls the start of the smoke exhaust fan;

3. Local control: 280 smoke exhaust fire damper should be directly linked to control the stop of the fan and the control box of the on-site smoke exhaust machine to control the start and stop after closing.

Manual on-site control, fire control room remote control, damper interlocking control.

There are three design schemes for ventilation and HTF fire high temperature smoke exhaust fans, the first smoke exhaust ventilation is provided with a system, the second smoke exhaust ventilation is used with a system, and the third uses the induction fan exhaust plus the smoke exhaust system. After the three options are selected, the air volume is calculated. Six air changes are used for smoke exhaust, and the air volume required for ventilation is required to remove the concentration of harmful substances.

The specific calculation method is standardized. After these two air volumes are calculated, the maximum value of them is taken as the calculated air volume. Then there is the selection of the smoke exhaust vent.

Generally speaking, the plate smoke exhaust port HTF sail canceler is used to prevent high temperature smoke exhaust fan. and square diffuser exhaust. After the specific model is selected, there are some data such as wind speed and diameter.

Calculate the air volume of a single tuyere. Divide the total air volume by the air volume of a single tuyere to calculate the number of smoke exhaust and exhaust outlets. Well, the basic system is established.

Sketch out. Perform hydraulic calculations and calculate the diameter of the duct. Identify the most unfavorable loop.

Determine the resistance of the pipeline and calculate the resistance loss. The total drag loss plus the terminal velocity is the dust provided by the fan.

Well, now that the pipe, tuyere, smoke outlet, total pressure head, and total air volume are available, you can choose the fan according to the total pressure head and air volume.

1. Monthly maintenance of smoke exhaust valves, smoke exhaust fire dampers and air supply valves

1) Whether there is deformation or damage to the smoke exhaust outlet and air supply outlet, and whether there are obstacles around it that affect the use;

2) Whether the flange of the connection between the air duct and the smoke exhaust port is damaged, and whether the bolt is loose;

3) Whether the valve is complete, whether the fusible piece falls off, and whether the action is normal;

4) Whether the rotating mechanism is flexible, and add an appropriate amount of lubricant to the mechanical conveying mechanism every year;

5) Whether the braking mechanism and limiter meet the requirements;

6) Carry out manual and remote opening and closing operations to check whether it can be fully opened.

2. Weekly maintenance of air supply and smoke exhaust fans

1) There are no combustible materials around the fan room; whether the installation bolts are loose or damaged;

2) Whether the transmission mechanism is deformed or damaged; whether the impeller is in contact with the housing;

3) Whether the wiring of the motor is loose; Whether there is corrosion in the shell of the motor;

4) Whether the power supply is normal (check the voltmeter or power indicator).

5) Check whether the lubricating oil of the bearing part is abnormal (dirty, mixed with sediment, dust, etc.);

6) Check whether the lubricating oil level of the bearing part of the motor is normal;

7) Check whether the transmission belt is loose and whether the coupling is firm;

8) Start the motor, whether there is abnormal vibration and noise when rotating.

9) Operate the manual or automatic start device, and carry out the action test and inspection of each smoke-proof zone (or positive pressure air supply).

The following matters: a. Whether the manual or automatic can be started normally;

b. Whether the operating current is normal;

c. Whether there is irregular noise and abnormal vibration during operation;

d. Whether the area of the action equipment corresponds to the original design.

3. Maintenance of fan cabinets

1) Whether the control cabinet is set in a position that is easy to operate, inspect and maintain.

2) Whether the control cabinet is deformed, damaged or corroded.

3) Whether the circuit diagram and operation instructions are complete.

4) Whether the pointer of the voltage and current meter is within the specified range.

5) Whether the switch is deformed, damaged, the sign falls off, and is in a normal state.

6) Operate the switch, check the performance of the switch, and check whether the indicator display status is normal.

7) Whether the relay falls off or is loose, whether the contact is burned, and whether the transfer switch can be switched normally.

4. The air volume of the smoke exhaust fan should be measured every year.

5. Monthly positive pressure air valve: check whether the air supply valve is in good condition and whether the air supply function can be completed.

6. Whether the daily power supply is turned on, and whether there is an emergency power supply that can be automatically switched;

1. First calculate the number of fans in the drawings and calculate the engineering quantity of the equipment support.

2. Calculate the engineering quantity of ventilation ducts according to the calculation rules, (if it is a galvanized iron air duct, there is no need to calculate the engineering quantity of the bracket, which is included in the quota) Kai dismantling.

3. Calculate the engineering quantity of smoke exhaust tuyere, fire valve, smoke exhaust valve and positive pressure air outlet.

4. Calculate the amount of support engineering for fire damper and smoke exhaust valve.

5. Pay attention to the positive pressure air outlet in the corridor and the smoke exhaust fan on the roof can not be omitted.

6. Calculate the amount of fireproof canvas for hoses connected with various air ducts and fans and fire dampers.

7. Calculation of engineering quantity of "system commissioning", such as positive pressure air supply outlet, smoke exhaust fire damper, etc. Former Zheng.

8. Finally, summarize the above items.