1, the scope of application
This workmanship is applicable to medicine, electronics and other industries purification ventilation pipe, purification equipment and purification air conditioning accessories installation.
2, construction process
2.1 purification ventilation duct production and installation construction process
2.1.1 production: construction preparation (including machinery, apparatus inspection; team construction technology, safety briefing; familiarize with the construction drawings, etc.) → plate inspection, acceptance → material cleaning, removal of oil stains → sample, material → production of nibble (folding) cleaning nibble oil stains → making Duct semi-finished products → remove surface oil debris → riveted molding and then clean the internal and external surfaces of the duct → inspection and acceptance → closed mouth → storage for loading.
2.1.2Installation: construction preparation → lifting and production (including material, straightening, molding, descaling and brushing oil, etc.) → on-site lifting point arrangement → semi-finished products are transported to on-site assembly room → duct assembly (including cleaning of qualified valve components) → closed port measurement piping (and then produce piping according to the production process) → transported to the site to be assembled into a closed system.
2.2 purification air-conditioning equipment installation construction process construction preparation (including familiarization with drawings, team technical briefing, preparation of machinery and materials, etc.) → foundation acceptance, re-measurement, correction, processing → equipment unpacking, inventory, inspection, acceptance → cleaning equipment → equipment lifting, positioning, leveling, squaring → equipment piping production, installation (according to the production of purified air ducts, installation process) → equipment test run →Debugging of equipment with load operation → completion and acceptance.
3, construction technology and technical measures
3.1 ventilation duct production construction technology and technical measures
3.1.1 Acceptance of the plate
3.1.1.1 The material must be delivered with a warranty.
3.1.1.2 Material appearance check must be flat, smooth, no corrosion, no scratches, such as galvanized steel requires no zinc layer sharp fall phenomenon.
3.1.1.3 Material requirements for high quality standards.
3.1.2 remove material oil: in the release of the material must be removed before the plate surface oil, must be done: a touch, two rubbing, three view, to ensure that the complete removal of oil on the surface of the plate.
3.1.3 put sample under the material: in order to avoid in the put sample under the material in the sheet surface scratches and abrasions, damage to the galvanized layer, stained with dust, special provisions shall not be in the cement or soil bad floor under the material, but should be in the flat cement floor with δ = 3mm cloth rubber sheet under the material.
3.1.4 system bite: galvanized steel in the cut into pieces of material, handling shall not touch the ground dragging, in order to prevent abrasion scars or stained with dust, should be used in homemade storage racks or four-wheeled trolleys for transit, the production of bite.
3.1.5 Remove the bite of oil: due to the bite of mechanical contamination, in the production of bite often contain oil debris in the bite. In combination molding must again clean the inner and outer surfaces of the plate sheet and the nibbles.
3.1.6 made of semi-finished products: bite mouth oil pollution removal, can be combined with the plate sheet molding, made of semi-finished products of air duct.
3.1.7 Cleaning the surface of the oil debris: after the combination of sheet material molding, the surface of the air duct semi-finished products must be cleaned again oil debris.
3.1.8 riveted forming: after the combination of air duct sheet material molding, must be riveted with the duct flange molding, riveting should be in strict accordance with national specifications riveted, and rivets must be galvanized, riveted after the use of adhesive coating or tin soldering method to fill the gaps or holes, need to be reinforced duct, reinforcing reinforcement can only be located in the outer surface of the air duct, and shall not be used in the fluting method of reinforcing.
3.1.9 Cleaning of internal and external surfaces: riveted molding of the duct shall be the final cleaning, the order is as follows:
3.1.9.1 Mechanical vacuum cleaner to remove dust inside and outside the wind.
3.1.9.2 Scrub inside and outside with diluted cleaning agent (focusing on the inner surface), and then scrub the inner surface with cleaning agent to the extent that the dirt is completely dissolved.
3.1.9.3 Continue to scrub the duct with water until it is brushed clean.
3.1.9.4 Dry the inner and outer surfaces of the duct with a fresh bleached cloth, requiring no water stains or dew.
3.1.9.5 Finally, use silk to scrub the inner wall twice.
3.1.10 Acceptance, sealing, storage: prefabricated air ducts along with the completed inspection form to the inspector to check, after passing the inspection before entering the warehouse, the specific operating procedures are as follows:
3.1.10.1 Inspection of a person responsible for, carefully and comprehensively check the air ducts, the method is to use a white silk cloth to the negative pipe on the suspicious places for localized rubbing in order to achieve Indeed no dirt as qualified.
3.1.10.2 is responsible for the authentication of acceptance before sealing, sealing material selection of high-quality vegetative film, each side of the flange beyond the edge of about 100mm.
3.1.10.3 In order to solve the plastic film is easy to break and cause pollution, in the plastic film covered with a layer of plastic coated textile cloth for protection.
3.1.10.4 The last part of the seal is tightly tied with adhesive tape, and then stored in the warehouse.
3.2 Construction process and technical measures of duct flange production 3.2.1 The profile of the flange must meet the high quality standards, and there shall be no serious corrosion, crusting or pockmarking.
3.2.2 short flange inner edge (or circular flange inner diameter) size allowable deviation of ± 2mm.
3.2.3 flange group welding seam unevenness is not greater than 0.5mm, rivet hole spacing should not be greater than 100mm, the bolt hole spacing should not be greater than 120mm, the hole spacing requirements are accurate, and have interchangeability.
3.2.4 Remove welding slag, wipe clean floating rust.
3.2.5 Brush the strong adhesion of antirust paint two degrees, screw holes and corners shall not have paint dripping phenomenon.
3.2.6 flange finished storage must be sorted and leveled, not twisted, and pay attention to protect the paint surface from wear and tear.
3.3 Ventilation duct installation of construction technology and technical measures 3.3.1 duct installation shall be installed from the root of the main forward installation, to avoid the air duct to the mouth, by the dust pollution beam, so before installation must be done:
3.3.1.1 to the installation of air ducts to be installed towards the measurement of the location of the sampling, to be installed in advance of the need to add the hanging, bracket, bracket, do not allow the installation of the side to play the hanging, to avoid opening the seal when the dust invades the beam. Avoid opening the seal when the dust invades the tube.
3.3.1.2 The clean air duct opening and sealing installation process shall not cross work with other types of work.
3.3.1.3 clean area of the outer wall must be all built, doors and windows are installed, and installed glass, all holes closed tightly to achieve no outside dirt intrusion.
3.3.1.4 purification area of the internal partition wall must wait for the clean air duct installation is completed, the port is closed and then construction, in order to prevent the compartment of the brick seam of the dust is vibration fly out of the air duct to invade.
3.3.1.5 The floor and wall shall be fully cleaned and vacuum cleaner to carefully remove floating dust, the ground with water to flush clean, often maintain a good environment, the installation workers must first change clothes and shoes in the locker room outside the door before entering the indoor operation.
3.3.2 The air duct is connected to the flange as soon as it is opened to avoid the air duct being opened for too long and the dust invading into the duct, and the side that is not connected for the time being shall not be opened to keep the duct clean.
3.3.3 flange connection gasket using 8501 anionic sealing tape, gasket shall not be convex into the pipe, and on the inside wall flush with the pipe.
3.3.4 to be installed in the finished pieces of homemade or purchased, should be cleaned up, after inspection to meet the cleanliness requirements for sealing, the operation of the same method of production with the purification of air ducts.
3.3.5 Valve components in the clean system, its production and installation of the processing method in addition to the technical requirements of the drawings, are the same as the production of purified air duct.
3.4 Construction process and technical measures for air-conditioning equipment installation.
Clean system in the ventilation and air conditioning equipment in addition to must be in accordance with the national construction acceptance specification in the equipment installation part of the technical measures, but also must do:
3.4.1 air conditioning unit, fresh air unit in the pre-installation need to be inspected and acceptance of the cleaning process, the requirements of the oil-free, no floating dust, and all the holes, the mouth for closure.
3.4.2 Equipment and system air ducts connected, should be made in advance with accurate size of the piping, and in accordance with the production method of purification duct, make a good seal, transported to the site. Installation of open sealing time shall not be too long to ensure that dust, dirt shall not invade the air duct and air-conditioning equipment, and equipment connected to the production and installation of soft joints shall comply with the design requirements of the drawings and national acceptance criteria, and its clean processing with reference to the air duct processing.
3.4.3 The installation of high-efficiency filters must be:
3.4.3.1 The high-efficiency filters should be handled and stored vertically according to the factory mark.
3.4.3.2 The high-efficiency filter must be checked one by one before installation, and the paper of the filter should be free of cracks and pinholes and their damages (available for inspection by light), and its external dimensions should not be allowed to exceed ±1.5mm. The outer frame of the filter should not be modified.
3.4.3.3 The high-efficiency filter must be installed in the clean system after all the works are completed, and a comprehensive broom blowing test run to meet the clean requirements before opening the box for inspection (there should be no deformation, breakage and leakage of glue, etc.) Immediately after the installation of qualified in place.
3.4.3.4 The sealing gasket between the filter and the frame should be positioned to stick on the filter frame, and the dirt on the filter frame should be removed before pasting, and the 8501 flame-retardant sealing adhesive tape should be used with 7m-5mm-mm.
3.4.3.5 During the installation of the high-efficiency filter, attention should be paid to the arrows on the frame should be in the same direction of the airflow, and it should not be mounted in reverse and should not be used with the head, The filter paper should not be touched by hands or tools to prevent damage, and the corrugated paper of the filter combined with corrugated board must be vertically installed when installed vertically, and should not be reversed.
3.5 purification and air conditioning system production and installation of notes
3.5.1 air duct and valve components production bite form day using a single flat bite, corner bite and joint corner bite, such as the use of button bite must be coated with full seam sealant, prohibit the use of mortise and tenon type connection, air duct corners and the four corners of the hole need to be coated with 8601 sealant.
3.5.2 Duct production should minimize the splicing, rectangular duct bottom width in 900mm, there should be no splicing, in 900mm or more should minimize the longitudinal splicing, but there shall be no transverse splicing, 1000mm down to a splicing, 2400mm down to two splicing, splicing bite using a single flat-type nibble, pay attention to the production of nibble when the splicing of the flat side on the tube, not the phenomenon of counterproduction. The inner wall of the splicing, there shall be no countermeasure phenomenon.
3.5.3 Flexible flexible rectangular duct production using high-quality glossy artificial leather (or plastic-coated cloth), the production of the inner wall smooth, longitudinal seam gluing requirements for smooth, no holes or leakage of glue gap.
3.5.4 set up in the clean system air ducts on the inspection door, the production should be easy to open and close, good sealing, shall not be processed with black steel plate.
3.5.5 board and a half to remove oil, storage in order to facilitate the cleaning and to avoid contamination of dirt, shall be set up 300mm above the ground platform, paved with δ = 3mm of the sandwich cloth rubber sheet.
3.5.6 Processing three movable flatbed trucks used to transfer sheet, semi-finished products, the size did not count for 1300,000,00 (unit mm). Use steel as the skeleton, using high-quality rubber wheels, covered with galvanized steel, and is required to keep clean.
3.5.7 In order to avoid the dust between the duct pre-production should be often rinsed with water, must do a standard cement floor, and 150mm from the wall around the drainage ditch, in order to rinse the site of the drainage.
3.5.8 in the cleaning room, the finished product stacked in the warehouse should be set up door and window curtains to prevent dust.
3.5.9 operators in the construction should wear clean, smooth, soft and non-dusty nurse hygiene clothing, into the clean room operation should change shoes, work gloves with white cloth gloves are appropriate.
4, machinery and equipment
4.1 scissor machine (Qcl2y-6-500) 1
4.2 electric welding machine (BX2-300-2) 2
4.3 wheel cutting machine 2
4.4 section steel cutting machine (CY30-6) 1
4.5 bending machine (WY67- 100/3200) 1 set
4.6 Press button nibbling machine (δ=1mm) 2 sets
4.7 Combined nibbling machine (δ=1.2mm) 2 sets
4.8 Single flat nibbling machine (δ=1.2mm) 1 set
5, the labor combination
According to the size of the project and the requirements of the construction progress, the general setup of ventilators 20 to 30 people, 2 to 4 welders, commissioning workers 6 to 8 people.
6, quality requirements
6.1 leakage inspection of air ducts, every 10m seams, leakage should not be more than 2, and the average of 100m seams should not be more than 16, leakage point sealing treatment.
6.2 Wipe with white silk cloth to check no oil and floating dust.
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