【 Weak current College 】 duct insulation construction technology---Power By 【 China power house network 】

1. preparations (1) confirm the site civil engineering structure has been completed, no significant construction water occurs.　　(2) confirm the wind tube above the piping, electrical, fire and other specialty end of construction, so as to avoid lots of basic cross-job destruction of insulation.　　(3) air duct system is installed, the post quality, inspection and supervision of qualified, through subtle engineering inspection records.　　(4) air conditioning system conditioining qualified. (5) construction required for various materials have to sound, its material quality certificate and the certificate is complete, the various indicators meet design requirements, the supervision inspection qualified, authorization to use. (6) construction of a ladder, shelves, lamps, the inspection is complete and reliable.　　2. technology of A. Engineering General in accordance with the design requirements of insulation. On clean air duct generally use nonflammable closed-cell insulation rubber sponge, exhaust duct generally use inflammable aluminium foil glass wool Panel, the process is as follows: B. insulation specifications should meet the design requirements, and have the quality certificates of conformity, etc.　　C. material to be accurate.　　Cutting of flat, in cutting the level you want to make the vertical plane lap to short side two overhead on the beam. D. uniform coating thickness to shall not be stacked, flowing.　　E. insulation adhesive coated tiles, no empty drum, close no exposed seams.　　III. construction technology 1, closed-cell insulation rubber sponge process (1) first wind pipe surface wipe clean, wipe the surface dust and water and dry.　　(2) according to the duct size cutting insulation.　　1) insulation material, it is necessary to pay attention to the two long side clamp short edge, on square duct to make it on the bottom two vertical edges clamped. 2) crop obturator rubber sponge Board can use wallpapers knife, blade length to fit and keep it sharp, cutting even when using low to moderate, section to flat.　　3) on the hallway, Hall, and other important places of extra-low wind pipe, in order to ensure smooth cross-cutting, cropping, polyethylene plate appearance may use hand-held grinding wheel cutting machine.　　(3) in the pipe, and closed-cell rubber sponge Board respectively on 401 glue evenly brush, wait a moment until slightly dry after bonding.　　(4) with a rubber hammer tap-hole rubber sponge Board, especially wind pipes at the four corners to duct unstuck.　　(5) check the insulation appearance, if not suitable of timely patching.　　2, aluminum foil glass wool Panel insulation process (1) first wind pipe surface wipe clean, wipe the surface dust and water and dry.　　(2) bonded insulation nail 1) insulation thickness 40 mm, 60 mm long aluminum heat preservation nails.　　2) 401 glue smudges in wind pipe, respectively and insulation nail bond surface, wait a moment until slightly dry after sticking.　　3) insulation nail bonded density: duct side, the following 12/© o, top 9/㎡. nails and nail spacing of not more than 450 mm from the edges of the duct is not greater than 75 mm. 4) after sticking nails 24h unseat gently, not loose insulation nail peeling can shop insultation materials.　　(3) cutting aluminum foil glass wool board. The Conference Board using steel blade, to make the long edge of the insulating material is caught in the short edge, small pieces of insulation materials to use in the wind pipe on the horizontal plane.　　(4) with cover foil glass wool Board 1) will build a good foil glass wool board stuck in the air duct, a small amount of force the in and out of glass wool insulation nail plate, after checking the accuracy, use insulation screw capping it fixed.　　Pressure lid should moderate elasticity, uniform compaction.　　2) to cover the nail bending over pressing.　　3) insulation to clad nail shop so that the longitudinal and transverse joints staggered board room slot to tight formation. 4) duct flange must be reliable insulation.　　5) on the large side is greater than 1200 mm of air duct, insulation, every 500 mm, together with packing tape. Strapping and duct corners with Office short metal angle. (5)-stick aluminum foil tape. Glass wool board slot to use aluminum foil tape sealing.　　Belt width flat tile joints is 50 mm, air duct, corner of 80 mm. the adhesive tape is well-distributed moderation, so the tape firmly paste in aluminum foil glass wool Board shall appear on, splitting and shedding.　　(6) around glasscloth 1) glass cloth width should be 300-500 mm, the wound should be one splice half so that insulation of two layers of glass-forming appearance of cloth wound.　　2) often cut out of glass sheets with one side is Flash, when you must use the Flash on the inside, to facilitate more elegant.　　3) glass cloth swing head firmly to the adhesive. 4) on some elbows, tees, reducers and other places, wound pipe when fabric formation, moderate elasticity and, if necessary, the cloth available plastic glued in insulation cotton. (7) brush fire retardant paint.　　Finally in glass fireproof paint on canvas brush twice. Brushed to Shun glasscloth winding direction brushing, coating should strictly uniform, and take the necessary protective measures, so as to avoid contamination of other sites.　　(8) insulation outsourcing galvanized.　　Air conditioning in the engine's air duct paste after no longer wrap aluminum foil tape Bose cloth, but package galvanized.　　1) air duct insulation cutting metal after dimensions, note how make allowance for the lap.　　2) Tin to install from the bottom up, lap Office using self-tapping screw fixation, self-tapping screw spacing is 120 mm. 3) elbows, tees, reducers, such as insulation and want to keep the original shape, metal installation to arc, take the seams in the same side of air duct. 4) in order to guarantee the smooth installation appearance, iron sheet on large wind pipe insulation thickness can be used and uniform thickness of the wood-party framework into nail iron sheet using self-tapping screws fixed to the wooden frame.　　IV. quality criteria 1, ensure the project (1) the insulation material, specifications and fire performance must conform to the design and fire protection requirements.　　To examine materials of the certificate.　　(2) air ducts and equipment connector service and easy to produce condensation area, must be good, tight insulation, seamless. 2. basic items (1) polyethylene sheet insulation should satisfy the following requirements: pasted firmly, slot glue insert embedded rich, dense, uniform slot neatly, flat, vertical joints staggered.　　(2) glass woolBoard insulation should be close to the wind tube surface, solid, elastic bandage.　　(3) glasscloth protective layer should moderate elasticity, uniform, the formation lap.　　(4) galvanized protection should overlap downstream direction, and the width of the appropriate interface formation, firmly fixed, lap uniform appearance.　　(5) air valve insulation to not prevent actions that opening and closing signs clear and clear.　　3. tolerance project 5, finished product protection (1) stacked in the insulation of the premises must take measures to securely placed in the Interior and aerial and terrestrial.　　(2) galvanized iron wire, glass cloth and holding screw and insulation rubber good materials to save Office Depot, ad-collar, called return on time. (3) pipeline pressure when checking, prevent a large number of water immersion insulation.　　(4) is strictly prohibited in the insulation on the after ventilation duct, move on. 6. problems (1) preservation of the process to do a check, clearance, insulation glass cloth before and wrapped around the former has to do covert examination record.　　(2) adhesive insulation to nail, taking due account of the full indoor temperature curing time.　　Heat preservation nails are not glued to avoid clash against loss. (3) glass cloth swing head must be glued to prevent loose. (4) brush fire protection paint to reliable measures to avoid contamination of the wall and ground.