"JB/T 10281-2001" fire smoke exhaust fan technical conditions

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  JB/T 10281 - 2001 Fire Fume Ventilation Fan Technical Conditions

Foreword

This standard is based on GB 50045 - 1995 "High-rise Civil Building Design Fire Protection Code" and GB 50067 - 1997 "car garage, garage repair, parking lot Design Fire Code" in the preparation of the mechanical exhaust smoke requirements.

This standard is proposed and managed by the National Fan Standardization Technical Committee.

This standard was first published.

 

1 range

This standard specifies the definition, technical requirements, test methods, inspection rules, markings, packaging and transportation of fire smoke exhaust fans.

This standard applies to mechanical smoke exhaust systems installed in various types of buildings. In the event of a fire, axial and centrifugal exhaust fumes

Fan.

2 reference standards

The provisions contained in the following standards are incorporated into this standard and constitute the provisions of this standard. When this standard is published, the versions shown are

For effective. All standards will be revised and all parties using this standard should explore the possibility of using the latest version of the following standards.

GA 211 — 1999 High-Temperature Test Method for Fire Exhaust Fans

GB / T 1236 - 2000 Industrial fans performance test (idt ISO 5801: 1997) with standardized airways

GB/T 2888 — 1991 Fan and Roots Blower Noise Measurement Methods

GB/T 3235 - 1999 Ventilator basic type, size parameters and performance curve

GB/T 13274 - 1991 General purpose axial flow fan technology

GB/T 13275 — 1991 General Purpose Centrifugal Fan Technical Conditions

GB/T 13306 — 1991 Signage

JB/T 6445 — 1992 Ventilator Overspeed Test

JB/T 6886 - 1993 Ventilator Coating Technology Conditions

JB/T 8689 - 1998 Ventilator Vibration Detection and Limits

JB/T 8690 - 1998 Industrial Fan Noise Limit

JB/T 9101 - 1999 Fan Rotor Balance

JB / T 10213 - 2000 Fan welding quality inspection technical conditions

JB/T 10214 - 2000 Ventilation Equipment Braided Seating Technical Conditions

3 Definitions

This standard uses the following definition.

3. 1 fire smoke exhaust fan

It is installed in the mechanical smoke exhaust system of a building and is used to remove fumes when the building is in a fire.

Can be used for ventilation.)

3.2 2 motor air cooling system

When the motor is operating at a higher ambient temperature, a forced ventilation system is provided to protect the motor.

4 Technical requirements

4. 1 design requirements

4. 1. 1 Fire smoke ventilators shall comply with the provisions of this standard, and shall be in accordance with the drawings and technical documents approved by the stipulated procedures or by the agreement between supply and demand.

The proposal requires design and manufacturing.

4. 1. 2 The type, size parameters and performance curve of the fire smoke exhaust fan shall meet the requirements of GB/T 3235 .

4. 1. 3 The fan shall be designed for at least 10 years at a medium temperature not higher than 85 °C . The safe operation before the first overhaul

The time should not be less than 18,000 hours (including inactive hours).

4. 1. 4 The material used to manufacture the impeller for the fire smoke exhaust fan shall ensure that: when the temperature of the conveying medium is 280 °C and continuous operation for 30 minutes , the leaves

The wheel has sufficient mechanical properties.

4.2 Product performance of fire smoke exhaust fan

4. 2. 1 The fire smoke exhaust fan should be capable of long-term normal operation under the condition that the medium temperature is not higher than 85 °C .

4. 2. 2 Fire smoke exhaust fan should ensure that: when the transmission medium temperature is 280 °C can work continuously for 30min , and cooled to the medium temperature

The ambient temperature can continue to operate normally.

4. 2. 3 At rated speed, in the working area, the measured pressure curve of the fan and the curve given in the specification shall meet the following requirements:

a) For axial flow fire smoke exhaust fans, the corresponding pressure deviation is ± 5% at the specified flow rate .

b) The deviation of the corresponding pressure value of the centrifugal fire smoke exhaust fan at the specified flow rate is ± 5% .

4. 2. 4 The noise level limit noise ratio A of the fire smoke exhaust fan given in the specification shall comply with JB/T 8690 .

4.3 Fire smoke exhaust fan impeller should be static and dynamic balance correction. The balance quality level is not lower than G5.6 . Impeller balance counterweight

The quality should be the same as that of the impeller and it should be welded or riveted to the impeller.

4.4 Fire exhaust fan wheel should be required JB / T 6445 test of the overspeed, overspeed speed of 110% of the maximum operating speed, ultra

Speed ​​time is not less than 2min .

4. The vibration limit of the operation of the fire smoke exhaust fan shall comply with the relevant provisions of JB/T 8689 .

4. 6 structural requirements

a) Axial flow fire smoke exhaust fan shall be equipped with motor thermal protection and air cooling system in fan ( H class insulation class

Motive ventilators may not have a forced air cooling system. The motor insulation rating should not be lower than class F.

b) Axial flow fire exhaust fan motor power outlets, should be inclusive of temperature-resistant heat-insulated casing or high-temperature cables.

c) Centrifugal fire smoke ventilators shall be equipped with a thermal insulation structure between the casing and the motor when using A -type transmission.

4. 7 Manufacturing Requirements

4. 7. 1 The position tolerance of the flange of the fire exhaust ventilator inlet and outlet flange should be less than or equal to φ 1.5mm .

4. 7. 2 Axial flow fire smoke exhaust fan impeller runout tolerance does not exceed the provisions of Table 1 .

4. 7. 3 Axial flow fire smoke exhaust fan impeller Arbitrary three adjacent blades Unequal pitch impeller According to the corresponding blade, two corresponding ends in the outer circle

The difference in pitch (chord length) does not exceed the specifications in Table 2 .

4. 7. 4 Axial flow fire smoke exhaust fan case size deviation, form and position tolerance does not exceed the provisions of Table 3 .

4. 7. 5 Axial flow fire smoke exhaust fan blade shape is wing type or twisted plate type, blade profile line line profile tolerance should be consistent

The provisions of JB/T 10214 .

4. 7. 6 The round run-out tolerance of the inner diameter of the impeller cover of the centrifugal fire smoke exhaust fan should be less than 1/2 of the minimum radial clearance between the impeller and the air inlet ;

The round runout tolerance of the wheel end surface does not exceed the requirements of Table 4 ; the flatness tolerance of the impeller wheel does not exceed the requirements of Table 5 ;

The disk verticality tolerance should be less than or equal to 1% of the blade outlet width ; the deviation of the blade outlet mounting angle is ο

0

+1 .

4. 7. 7 Centrifugal fan wheel fire smoke chord length of any two blades adjacent to the outlet end of the three difference k is as defined in Table 6.

4. 7. 8 Centrifugal fire smoke exhaust fan inlet should be smooth, smooth profile, the shape of the chassis side plate tolerance should not exceed the provisions of Table 7 .

4. 7. 9 Fire exhaust fan welding parts shall comply with the technical conditions JB / T 10214, the welding quality should comply JB / T 10213's.

4. 7. 10 The gap between the rivets should not exceed 0.1mm in the double rivet diameter range , and the rest should not exceed 0.3mm . The rivet head should be

Smooth and flat, no loosening of rivets, skewing, cracking, and riveting of rivet heads are allowed.

4. 8 assembly requirements

4. 8. 1 The radial clearance value of the axial flow fire smoke exhaust fan casing and the impeller should be uniform, and the minimum value of the radial single side minimum clearance: when the aircraft number is ≤ No.10

When the gap ≥ 3.5mm ; machine number > No. 10 , clearance ≥ 4.5mm .

4. 8. 2 The radial single-side clearance between the inlet of the centrifugal fire smoke exhaust fan and the inlet of the impeller wheel cover shall be uniform, and the radial single-side clearance value shall be in the leaf.

In the range of 0.15% to 0.4% of the wheel diameter, the axial overlap length of the air inlet and the impeller wheel cover should be 0.8% to 1.2% of the impeller diameter .

4. The technical requirements for the painting of the interior and exterior surfaces of fire smoke ventilators are in accordance with JB/T 6886 . The paint selected for the fan is ventilated

After sending 280 °C medium, the paint does not change color.

4. 10 The rotating parts of the fire smoke exhaust fan and all parts that may be loosened must be firm and reliable, and have anti-loosening measures.

4. 11 Drive assemblies, pulleys, couplings and other rotating transmission should be equipped with protective cover.

5 test methods

5. 1 impeller dynamic balance correction according to the provisions of JB/T 9101 on the dynamic balancing machine.

5.2 the impeller predetermined overspeed test was carried out JB / T 6445's.

5. 3 mechanical operation test of fire smoke exhaust fan

Continuous operation at the operating speed, after the bearing temperature stabilized for 20 minutes , measured the temperature rise and vibration of the bearing. Temperature rise must not exceed ambient temperature

Degree 40 °C , vibration detection and its limits shall comply with the relevant provisions of JB/T 8689 .

5.4 Aerodynamic Performance Test

The aerodynamic performance test of the fire smoke exhaust fan shall be conducted in accordance with GB/T 1236 .

5. 5 noise test

Noise measurement method according to the provisions of GB/T 2888 . The noise limit shall comply with the provisions of JB/T 8690 .

5. 6 high temperature test

According to GA211 regulations. High temperature performance requirements up to 4.4.2 Provisions.

6 inspection rules

6. 1 test classification

Fire smoke exhaust fan factory inspection and type inspection.

6. 2 factory inspection

Mass production of fire smoke ventilators shall be subject to factory inspection at the time of delivery. Axial flow fire smoke exhaust fans shall be in accordance with the provisions of GB/T 13274

Execution; centrifugal fire smoke exhaust fan according to the provisions of GB/T 13275 's.

6. Type 3 inspection

6. 3. 1 When one of the following situations occurs, a type test should be conducted:

a) The first products of all types of fans;

b) Transferred to production of the first product;

c) When the design structure, materials, and processes have major changes that may affect product performance;

d) When the production is stopped again after 3 years of production.

6. 3. 2 Axial flow fire smoke exhaust fan type inspection items according to GB/T 13274 ; centrifugal fire smoke exhaust fan type inspection project

According to GB/T 13275 implementation. The two ventilators shall also be tested for high temperature according to GA 211 .

6. 4 rules

6. 4. 1 Each ventilator must be inspected by the manufacturer's quality inspection department and issued with a certificate of approval before leaving the factory.

6. 4. 2 Sampling of the fan if it is poor, it should double the test, in line with the provisions of the still qualified, if still worse than the batch of products is not qualified,

Should be returned to the factory after the inspection and inspection after passing the repair.

6. 5 user requirements

When the user submits a special inspection request, it shall be stipulated in the contract between the supplier and the buyer.

6. Guarantee period

When the user complies with the rules for installation and use of the fan, within 18 months after delivery (from the date of shipment), due to manufacturing quality

In the event of damage or malfunction, the manufacturer shall repair or replace parts for free for the user.

7 signs, packaging, transportation

7. 1 mark

7. 1. 1 In the obvious position of the ventilator casing, turn arrows and product signage shall be installed. The contents of the signage shall at least include:

a) Model and name;

b) Main technical parameters: total pressure (or static pressure), flow rate, motor power, rotation speed and maximum medium temperature of the ventilator;

c) product number;

d) manufacturing date;

e) Manufacturer's name and trademark.

7. 1. 2 The size and technical requirements of the product label shall comply with the provisions of GB/T 13306 .

7. 2 Packaging and Transportation

7. 2. 1 Ventilators should be packed in boxes as much as possible. For the inconvenience of the overall packaging can be used in separate packaging, but there are measures to ensure the safety of the scene

After installation, the installation clearance and coaxiality of the product mee

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