1 scope
This technology is applicable to General
electrical conduit wiring of lighting engineering in the civil, not at high
temperature places, places vulnerable to mechanical damage and laying of the
roof.
2 construction preparation
2.1 materials requirements:
2.1.1 semi-rigid plastic pipe and fittings
must be made of fire-retardant treated materials. Plastic wall should be spaced
not more than 1M the continuous flame marks and factory standards and product
certification. Pipe wall thickness uniformity, no cracks, holes, bubbles and
deformation of tube and so on. Semi-rigid plastic pipe shall not be stored at
high temperatures and open spaces stacker.
2.1.2 distribution box: for the two
certified manufacturers, product certification of products.
2.1.3 switch box, outlet boxes, lamp boxes,
junction boxes, plastic boxes should look neat, complete knockouts, no
cleavage, and so on.
2.1.4 galvanized material: flat steel,
round steel, wood screws, machine screws, wire, etc.
2.1.5 supplementary materials: paints,
adhesives, cement, sand, and so on.
2.2 the main tools:
2.2.1 line pencil, tape measure, level,
barrels, buckets, ash, ash shovel.
2.2.2 hammer, cut son, hacksaw, saw blades,
knives, rasps, etc.
2.2.3 bench drill, drill, drill bits, wood
drill tool bag, tool box, high stools.
2.3 operating conditions:
2.3.1 closely integrated civil
construction, according to the wall of the building structure (such as a brick
wall, brick wall of aerated) better horizontal and wall thickness of lines,
installing boxes, cartons and pipe.
When construction of civil structures
2.3.2, templates, sliding formwork of concrete wall, be embedded in the process
of reinforcement set and pipe card at the hidden after inspection, and concrete
construction.
2.3.3 aerated concrete floor slab, plate
with a circular hole, good lifting floor boards shall be adjusted in time to
meet the construction joints for piping.
3 operational processes
3.1 process:
Line box fixed positioning → → → sweep for pipe
laying pipe Threading line
3.2 line positioning: according to
determine the horizontal and the thickness of the wall line map, determine the
location boxes, cartons and embedded parts; rows into columns of boxes, cartons
should be telephoned or cross lines to determine exactly where the boxes,
cartons.
3.3 box, fine is fixed:
3.3.1 block wall stable box, box. According
to tick the box, bin location line hole, hole size slightly larger than box,
box is appropriate. Clean up the hole, water will wet hole, and then use the
strength grade of cement mortar not less than M10 stable box, box.
After picking holes in hollow block wall
and broken blocks of cement mortar hole plugging, unstable box, box.
Fixed in 3.3.2 reinforced walls, floor
boxes, cartons:
3.3.2.1 wear reinforced box fixed directly
on the bars.
3.3.2.2 with machine screws on the box, the
box is fixed on flat steel, flat steel will be fixed on the steel.
3.3.2.3 precast floor slab stability buried
conduit Circular box: prefabricated plates with a circular hole, aerated
concrete floor lamp box hole, picking holes in the floor below the bottom up,
above the hole in the floor above the hole. Installed the card in the box rail
or car, pallet installed in the floor below, water will wet hole, and then use
the strength grade of cement mortar not less than M10 steady buried the box.
3.3.2.4 stability of the sliding formwork
for concrete wall box, box: reserved box, box sets, and then remove the box,
box sets, stability at the reserve holes buried boxes, cartons.
3.4 tube:
3.4.1 tube requirements:
3.4.1.1 semi-rigid plastic pipe casing
bonding connection can be used, sleeve length shall be not less than three
times the tube diameter; the interface should be located in the center of the
casing pipe, connection joints applying adhesives firm bonding.
3.4.1.2 when laying pipes, should try to
reduce bending when lines line segments longer than 15m or right-angled bend
when more than three should be added indirect box.
3.4.1.3 pipeline after deformation joints,
due compensation devices can move freely.
3.4.1.4 tick Groove with tube, not allowed
to mark cross-slot and tick off steel; aerated concrete panel only allowed
rejection of Groove-along the seams.
3.4.1.5 sliding vertical pipe sections
should not have joints within the template.
3.4.1.6 tube boxes, box, tube should flush
pipe Show box, boxes should be less than 5mm, and a tube of a hole, hole size
should coincide with the outer diameter of the tube.
3.4.2 block wall tube:
3.4.2.1 walls should be combined with civil
engineering, semi-rigid plastic pipe laid on the wall upward tube nozzle should
be well plugging and temporary support rod (steel or wood) along the direction
of laying the tubes started. For making boxes, cartons smooth, accurate
elevation, to laying pipe to dump box, 100mm box location, wall built after the
then pipe steady box, box.
3.4.2.2 tick Groove with tube should be on
each side of tank line, cold chisel tick. Wall of aerated concrete used saws
saw blades on both sides and then, Groove width and groove depth is larger than
the outer diameter of the pipe 5mm is appropriate. Apply pipe every 0.5M with
an iron nail, fine wire pipes fixed well. Then use strength grade of cement
mortar not less than M10 protection thickness should not be less than 15mm.
3.4.3 prefabricated pipeline laying on the
floor:
3.4.3.1 prefabricated laying pipe on a
plate with a circular hole, every 0.5M, away from the lamp holder cartridge
0.15m fine wire and plate hole fastening firmly fixed, and conduit Circular box
buried solid stabilization with cement mortar.
3.4.3.2 to partition reserved tubes should
not be too long, should block well pipe.
3.4.3.3 the pipe cement mortar to protect
against mechanical damage.
3.4.4 pipeline laying in concrete walls or
floor:
3.4.4.1 pipelines should be laid in the
midst of two layers of steel, it tube into the box should be blocking good
pipe, blocking good boxes. Line about every 0.5M from within 0.15m of the box
with a fine wire and rebar tie firmly.
3.4.4.2 pipe not too long into the wall
with reserved and well pipe plugging up tube steel stir up down tube can be
reserved and excluded hole in the wall is vertical (approximately 100mmx50mm),
or embedded casing after removal, under the tube.
3.4.4.3 when sliding the template construction,
by the switch box or junction box to the light pipe can be placed within the
bracket wall section, after sliding mode, remove the pipe, and when the roof to
light.
3.5 and tube lines:
3.5.1 after the tube, after the
construction of walls, floor (concrete works after the removed template),
should be carried out promptly and so Kwun Wat. Gordon in the process pipeline
and construction plans must be checked, handle the fault in the pipeline.
3.5.2 so Kwun Wat method should be used,
namely cloth fixed to the one end of the line, from pulling on the other end of
the pipeline, and clear the debris, water pipe. Gordon after the nozzle should
be blocking well closed boxes.
4 quality criteria
4.1 project:
Semi-rigid plastic pipe must be made of
fire-retardant treated materials, oxygen indices should be above 27%, the
material and the applicable provisions must comply with the design requirements
and specifications.
Test method: observation of concealed works
of checks or check the record.
4.2 Basic project:
4.2.1 connection close tube smooth, cover
more than 15mm.
Inspection method: Visual check, check
concealed work records.
4.2.2 box, box is set up correctly,
reliable and pipes into the box, the box straight, box, box showing length
should be less than 5mm.
Inspection method: observation, standard
checks.
4.2.3 piping a building deformation joints
should set compensation, compensation device of movement.
Inspection method: observation on concealed
works of checking and inspection records.
4.3 allowable deviation:
Pipeline laying and installation of boxes,
cartons tolerances shown in table 3-4.
5 finished product protection
5.1 when you pick your slot holes, do not
push too hard, so as to avoid breaking around the walls. Portal is not easy to
tick too large, too broad and do not cause structural defects.
5.2 protect tube ends immediately after,
when other types of operations, care should be taken not to pipe smashed and
trampled.
5.3 in the concrete, aerated when picking
holes in the plate, be careful not to tick off bar, picking holes should be
drilled first hole, then spread
Hole, hit with a sledgehammer by the above
hole is strictly prohibited.
When civil engineering concrete 5.4 should
be sent for care, to prevent the pipe displacement or against mechanical
damage.
6 quality problems to be noticed
6.1 piping exposed phenomenon, or a lack of
protective 15mm, pick your slot to ensure depth and pipes will be fixed in a
timely manner, and then protected with cement mortar.
6.2 hold and the embedded box, box has
skewed, coordinates are not allowed, the mortar is not full, and so on. Find
location when holding boxes, cartons, to inject the right amount of cement
mortar, then the fall line alignment, then around the box, box with cement
mortar filling the gap.
6.3 concave flat tube simmering bending
over and bend RADIUS must be greater than or equal to 6D. Simmering bending
operations and fixed and protected in a timely manner as required.
6.4 line doesn't make sense. The tube is
easy to fall into junk on and, therefore, shall promptly nozzle blocked well.
Other types of work, should be careful not to touch the loss finished laying
the pipeline to avoid pipe blocked.
7 quality records
7.1 semi-hard flame retardant plastic pipes
and accessories, quality certificates and oxygen index test report form.
7.2 distribution box factory quality
certification, other provinces and cities to Beijing should be
"two-part" approved production of acceptable proof.
7.3 technology to give the low-down, hidden
inspection, inspection, checking and cross-checking records.
7.4 semi-hard flame retardant plastic fill
pipe and pipe thread engineering quality inspection and assessment of tables
concerning the distribution of relevant content.
7.5 design changes, record of negotiation
and completion chart.
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