1 scope
This technology is applicable to all types
of metal air outlet, air valve, cover, hood and flexible tubes and other parts
work.
2 construction preparation
Requirements 2.1 materials and equipment:
2.1.1 material should have a factory
certificate or qualification documents.
2.1.2 in addition to the above documents,
Visual inspection should be carried out, all kinds of sheet metal surfaces
should be smooth, uniform thickness, no apparent injuries and no cracks,
corrosion and other defects, profile, evenly, without cracks and severe
corrosion conditions.
2.1.3 other defects in material cannot by
itself affect or reduce the quality or performance of the product.
2.1.4 cut Board machine, and folding party
machine, and bite mouth machine, and punch, and welding machine, and spot
machine, and Asia welder, and lathe, and bench drill, and profile cutting
machine, and empty pressure machine and the painting equipment, and manual, and
electric hydraulic rivet clamp, and electric pulled riveting gun and ruler, and
feet, and designated rules, and designated needle, and hammer, and wood hammer,
and ocean rushed, and wrench, and screwdriver, and wire clamp, and steel tape
and the dedicated stamping mold, and tooling,.
2.2 operating conditions;
2.2.1 should have large, bright, ground
smooth and clean facility.
2.2.2 work sites to meet the processing
requirements of machinery and equipment, the appropriate power supply, safety
protection devices and fire control equipment.
2.2.3 air duct parts shall be according to
the relevant State standard design drawings and construction of written
technology, deliver the quality, safety and construction budgets.
3 operational processes
3.1 air flow:
Frame cutting → (die)
Picking blade cutting → (die)
forming the Assembly surface treatment welding → → →
Machine parts and other parts processing
Factory → products → test →
3.2 picking:
Air inlet is made according to its type,
specification, use different materials.
3.3 cutting, molding:
3.3.1 outlet under the part of material and
form should be completed using a special die.
3.3.2 aluminum Tuyere materials required
for profiles, metal forming, with the exception of special mould should be
used, should also be equipped with a special aluminum cutting machines.
3.4 Assembly:
3.4.1 when forming air inlet parts
Assembly, there should be special tooling to ensure product quality. After
product Assembly, inspection should be carried out.
3.4.2 wind pipes surfaces should be smooth,
with design dimension of tolerance should not be greater than 2mm, rectangular
vent two diagonal difference should not be greater than 3mm round vent any two
orthogonal tolerance should not be greater than the diameter of 2mm.
Turning Regulation section 3.4.3 inlet
should be flexible and leaves should be straight, with borders not collisions.
3.4.4 grate plate air type and activity,
gate, grate plate should be flat, smooth edge, pull the flexible. Activities
bi-plate outlet should be able to reach safety after Assembly called that open
and close.
3.4.500 leaves the air blade spacing should
be uniform, at both ends should be in a straight line from the center of the
shaft. Manual air vane and rivet of the border get elastic is appropriate.
3.4.6 diffuser the diffuser ring and loop
with axis, the axial spacing should be evenly distributed.
3.4.7 orifice air inlet, orifice without
burrs, Aperture and the distance, the design requirements.
3.4.8 rotary air outlet, the activity
should be light and flexible.
3.4.9 spherical air between the inner and
outer sphere needs to be elastic moderate, turning freely, adjusting should be
able to effectively adjust the air flow.
3.4.10 outlet activities, such as
integration with other shafts, bushings, tight fit, and should add oil after
Assembly is complete.
3.5 welding:
3.5.1 steel outlet after completion of
welding according to different materials, select the welding gas welding or
electric welding. Aluminum Tuyere argon arc welding should be used.
3.5.2 by the decorative surface of the weld
shall not, and shall not have an adverse impact on the decorative surface
appearance.
3.5.3 after the welding is completed, the
outlet should be adjusted.
3.6 surface treatment:
3.6.1 outlet surface treatment, design and
operating requirements should be met, depending on choice of materials such as
paint, spray, oxidation and other means.
3.6.2 If outlet bigger, should be taken in
the appropriate part of the leaf and frame reinforcement measures.
3.7 air valve process:
Outer box material forming
Picking blade metal forming, welding
Assembly testing → adjustments → spray →
Machine parts and other parts processing
→ Assembly actuator → products → test → factory
3.8 picking:
Air valve required for the production of
different types of materials should be based on strict selection.
3.9 cutting, molding:
Frame and blade cutting machines should be
used to complete, should be used in a special die.
3.10 parts processing:
Valve moving parts should be used in
non-ferrous metal production, to prevent corrosion.
3.11 welding Assembly:
3.11.1 box welded using welding or gas
welding methods, and to ensure that the limits of its welding deformation to a
minimum.
3.11.2 air valve Assembly should be carried
out in accordance with the procedures provided for, valve production workshop,
regulating and braking device shall be accurate, flexible and reliable, and
indicate the direction of valve opening and closing.
3.11. more than 3 blade damper blade should
fit tightly, evenly spaced, lap.
3.11.4 Check shaft must be flexible, disc
shut tightly, the material of the shaft are not prone to corrosion.
3.11.5 fire damper required for the
production of steel thickness shall not be less than 2mm, rotating parts should
be flexible at all times. Fuse for the approval and inspection of regular
products, tolerances of its melting point temperature is-2 degrees Celsius.
3.12 air valve should be adjusted and
tested after Assembly is complete, and embalmed according to requirements.
3.13 if the air valve size is too large,
can be cut into several small valves production.
3.14 fire valves in the valve body
production is completed and tested one by one to be packaged with implementing
agencies.
3.15 cover such processes:
Picking → → forming → assembled
under factory → products → test →
3.16 picking:
Cover parts according to the different
requirements can choose common steel, galvanized steel, stainless steel and PVC
plate and other materials.
3.17:
According to the different cover types
after setting out the material, and machining.
3.18 forming, Assembly:
3.18.1 cover parts of Assembly depending on
the materials used and the application requirements, scuffing, welding and
other means can be used, its methods and requirements described in the wind
pipe making section.
3.18.2 used steam or other moist air canopy
hood should be excluded in the appetite of condensed liquid measures.
3.18.3 exhaust hood should not be greater
than 60 ° spread angle.
3.18.4 if required, should also be in the
cover with a regulating valve, automatic alarm, automatic fire suppression,
filtration, oil installations and equipment.
3.19 finished product testing:
Cover making size should be accurate,
connection should be solid, with a shell there should be no sharp edges.
Hood 3.20 process:
Picking → → forming → assembled under
factory → products → test →
3.21 hood of the production shall be
carried out in strict accordance with the national standard.
3.22 the hood making use of galvanized
steel, ordinary steel plate or other suitable material.
3.23 hood hood shape should be structured,
rotate the center of gravity should be balanced.
3.24 hood cutting, forming and Assembly
processes can see the wind pipe making section.
3.25 flexible pipe flow:
Picking material sewn → → → → flange Assembly
3.26 flexible tubes can use leather, canvas
resin glass fabric, soft rubber, reinforced asbestos cloth and other materials.
3.27 flexible tube length for 150~250mm,
not as a variable diameter tube.
3.28 after cutting sewing mechanical or
manual mode can be used, but must ensure that the firm closely.
3.29 to moisture-proof, flexible tube
brushes canvas painting the canvas, not brushing paint, prevent the loss of
flexibility and scalability.
3.30, flexible pipe and flange assembled
plates layering mode can be used, through a riveting combination, rivet spacing
of 60~80mm.
3.31, flexible tubes should not appear
distortion, flange on both sides should be parallel.
4 quality criteria
4.1 project:
4.1.1 size of various parts of the
specification, must comply with the design requirements.
Inspection method: standard and Visual
check.
4.1.2 damper must be shut tightly, rotating
components must be of corrosion-resistant material, shell, valve plate material
thickness is less than 2mm is strictly prohibited.
Inspection method: standard, observations
and operational checks.
4.1.3 of various types of valve assembly
must be dimensionally correct, leaves and shells without friction.
Inspection method: check.
4.1.4 clean system, such as the moving
parts of the valve and lever, such as carbon steel plate production, must be
galvanized, shaft is connected with the valve gap must be closed.
Inspection method: Visual check.
Clean 4.1.5 system flexible pipe materials
used must not produce dust, airtight, smooth inner wall. Flexible pipes and
ducting connections must be tight no leakage.
Inspection method: lighting and Visual
check.
4.2 Basic project:
4.2.1 Assembly connections tight and solid,
moving parts, flexible and reliable, elastic moderate.
Inspection method: lever and observe the
examination.
4.2.2 air quality should be qualified,
holes, slices, spread uniformly spaced, borders and blade straight and neat,
smooth and beautiful.
Inspection method: observation and standard
checks.
4.2.3 various dampers make opening and
closing tags, leafy valve blade attached, lap, wheelbase deviation is less than
1mm, valve plate and the handle in the same direction.
Inspection method: observation and standard
checks.
4.2.4 cover production. Hood size deviation
should be less than 2mm per meter, connect firmly, without sharp edges.
Inspection method: observation and standard
checks.
4.2.5 hood production size deviation of not
more than 2mm per meter, regular shape, rotate hood balance.
Inspection method: observation and standard
checks.
4.2.6 tight moderately flexible tube length
comply with design requirements and specifications provided, no cracking, no
distortion.
Test method standard and Visual check.
4.3 allowable deviation:
Air making size tolerances and the test
method should meet the requirements of table 4-19.
Air making size tolerances and inspection
methods table 4-19
Project tolerance (mm) test method
1
2
3 dimensions
Round difference between maximum and
minimum diameter
Difference between the two diagonals of the
rectangle 2
2
3 foot check
The diameter of the standard 90 ° to each
other
Standard check
5 finished product protection
5.1 product should be stored in a rain,
snow level area on the measures, and neatly.
5.2 draught product protection measures
should be taken to protect decorative surfaces from damage.
5.3 fire damper actuators should be
retro-cover, to prevent injury to the body or the loss.
Over more than 5.4 protection of control
valve to adjust the connecting rod, keep nuts in a tightened State.
5.5 in the process of loading and
unloading, transport, installation, commissioning, should pay attention to
protection of the finished product.
6 quality problems to be noticed
6.1 air inlet is the decorative surface
scratches easily, in the process of assembling on the operating table mats with
rubber plates and other soft materials.
6.2 good should be calculated according to
the specifications of the valve air valve blade blade number and width
dimensions.
6.3 fabrication of air valve, ventilation,
regular, flat, all kinds of size deviation control within the allowed range.
6.4 parts the moving parts of the product,
after the painting will produce poor maneuverability, should pay attention to
each other with the size in the process.
6.5 products in the production process of
sheet metal connections must be firm and reliable, particularly fire valves
products.
6.6 fire products pay attention to blade
and body clearance in order to ensure air tightness requirements.
6.7 in the install process, Flex tube as a
leveling will not find connection tube or reducer to use.
7 quality records
7.1 inspection projects and inspection
record form.
7.2 making section for quality inspection
and assessment of the Department table.
7.3 the metal duct fabrication section,
quality inspection and evaluation form.
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