Wire rope piping, wiring
1 scope
The technology standard is applicable to indoor lighting wire rope piping, wiring project.
2 construction preparation
2.1 material requirements:
2.1.1 insulated wires: specification, type of the wire must comply with the design requirements, and product certification.
2.1.2 wire: the steel hinge line as a wire, its cross-sectional area should choose according to actual span, load and mechanical strength, minimum cross section is not less than 10 was. And can not have back clasp, pine, shares, the phenomenon such as cramping. If use galvanized round steel as a wire, its diameter should not less than 10 mm.
2.1.3 galvanized round steel hook: the diameter of the round steel should not be less than 5 mm.
2.1.4 galvanized round steel earrings: round steel should not be less than 10 mm in diameter. Earring hole diameter should not less than 30 mm, joints shall be welded to death, the end should be bent into a dovetail.
2.1.5 galvanized iron wire: no back button should be straight, twist to wait for a phenomenon, and has stipulated mechanical strain.
2.1.6 flat steel hanger: should use galvanized flat steel, the thickness should be not less than 1.5 mm, width should be not less than 20 mm, the galvanized layer falls off phenomenon.
2.1.7 tie line: should be used with conductor wire core material of plastic insulation cable tie.
2.1.8 plastic sheath line: specification, type of the wire must comply with the design requirements, and product certification.
2.1.9 screw connection button: should choose according to wire section and the root of the wire number corresponding models of spiral wire reinforced insulation steel shell button.
2.1.10 LC secure cap pressure for requirement, please see section 3, 8, 3.5 the relevant content.
2.1.11: casing pipe with copper, aluminum casing pipe and copper aluminum casing three transition, when choose, should adopt corresponding casing with conductor material specifications.
2.1.12 terminal (wiring nose) : when choose, should choose according to conductor is the root of the number and the total cross section corresponding specifications of the terminal.
2.1.13 iron box: screw holes installation is complete, the threading is clear, fastening screws should be 5 mm in diameter. Box should not be split, deformation, damage, galvanized layer and anticorrosive paint complete don't fall off.
2.1.14 plastic box packing: suitable for plastic tube Ming fu wiring project, the material should be evenly split, box no damage such as deformation, discoloration phenomenon.
2.1.15 galvanized material: flower basket bolt, wire rope clip, heart-shaped ring, flat steel, round steel, Angle steel, machine screw, nut, spring washer, gasket, iron hoop, square pad.
2.1.16 auxiliary materials; Rubber insulating tape, glue plastic insulation tape, black tape, welding electrode, solder, flux, aluminum clamp, oxygen, acetylene, antirust paint, mixed paint, emery cloth, etc. Material should not be affected with damp be affected with damp, the phenomenon such as metamorphic date.
2.2 the main equipment:
2.2.1 pencil line, tape measure, spirit level, fall, chalk line bag, barrel, brush.
2.2.2 hammer and chisel, hacksaw, saw blade, flat file, round file, half round file, sets of wire board, bit.
2.2.3 sawing grinding wheel, grinding wheel, saw blade, set machine, cutter, electric welding machine, heat pipe, hydraulic stewed pig, welding tools, pressure case.
2.2.4 soldering iron, electric furnace, tin tin pot, spoon, rope, pulley, chain, tube teeth, megohmmeter, tool bag, toolbox, high stool, etc.
2.3 operation conditions:
2.3.1 while cooperate with civil engineering structure construction, iron and reserved holes will be well kept.
Cooperate with construction decoration in 2.3.2 rope hoisting and piping, wiring.
3 operation process
3.2 wire wiring regulations and requirements:
3.2.1 wire insulation on the wires to the distance of the ground, indoors is 2.5 m.
3.2.2 indoor cable wiring insulation wire Ming fu, porcelain (plastic) should be adopted or knob insulator, pin insulator fixed; Using sheathed wire, metal or hard plastic tube wiring, can be directly fixed on the wire.
3.2.3 cable wiring of the wire and steel strand used in cross section, should choose according to span, load and mechanical strength, minimum cross section should not be less than 10 was. The wire rope fixed should brush anti-rust paint or use galvanized parts. The ends of the wire rope should be taut, when large span should increase support point in the middle, intermediate support point spacing should be not more than 12 m.
3.2.4 on the wire rope hoisting metal or plastic tube wiring, shall meet the following requirements:
3.2.4.1 rope hoisting metal or plastic pipe support points on the largest spacing are shown in table 3-29.
The largest spacing between support points table 3-29
Cabling supporting point distance (mm) support point away from the lamp holder box (mm)
Metal tube
Plastic material tube 1500
1000, 200,
150
3.2.4.2 of flat steel hoisting box and pipeline clamp should not be less than 20 mm, the width of hoisting box the number of the clamp should not be less than 2.
3.2.5 rope hoisting sheathed on the line, shall meet the following requirements:
3.2.5.1 with aluminum clamp straight when apply on the wire, the support point spacing should be not greater than 50 mm; Clamp the distance from the junction box should not be greater than 100 mm.
3.2.5.2 with rubber or plastic sheath, junction box should be used in plastic products.
3.2.6 rope hoisting porcelain, shall meet the following requirements:
3.2.6.1 support point spacing should not be more than 1.5 m, the distance between the inside line should not be less than 50 mm, outside of the distance between the line should not be less than 100 mm.
3.2.6.2 flat steel bars of the terminal should be gallas line, its diameter should not less than 3 mm.
3.3 precast processing artifacts:
3.3.1 processing embedded iron: its size should not be less than 120 * 60 * 6 mm; Welding on the iron anchor reinforced its diameter should not less than 8 mm, its tail to bend into dovetail shape.
3.3.2 rainfall distribution on 10-12 dimension processing according to the requirement of the design framework of reserved holes; Processing good hoop, bracket, hanger, hanger, earrings, such as fixed clamp galvanized iron pieces. Non galvanized iron parts should be cleaning brush again on the antirust paint.
3.3.3 steel pipe or conduit for straightening. Cut off, set of wire, heat bending, prepare for pipe connection.
3.3.4 plastic tube for heat pipe, tube, to be prepared for the pipeline connection.
3.3.5 are made of galvanized steel strand button round steel as a wire, according to the actual length of cut required, wipe the surface of oil, to straighten it in advance, in order to reduce the elongation.
3.4 embedded iron and reserved holes:
Should be based on the size of the drawings marked position, in the civil engineering structure construction to fasten on embedded parts; And comply with civil accurately will leave good holes.
3.5 play line positioning:
According to plans determine the position of the fixed point, pop-up chalk line, even separated span, and make clearly marked colour paint.
3.6 the brackets:
Will have been processed to embrace hoop bracket on the structure, wear the heart-shaped ring set on the earrings and basket bolt used in hoisting rope. Fixed good bracket can be as the beginning of the line, middle and end.
3.7 wire assembly:
3.7.1 will pull out good wire rope end through the earrings in advance, and back to wear the ring into the heart, with two wire card 2 again. In order to prevent the loose end of a wire, iron wire available to tighten it.
3.7.2 will flower basket at the ends of the bolt screw nut of precession, keep its maximum range, and be ready to continue to adjust the wire rope looseness.
3.7.3 dismantle the wire will be tied to the end of a rope, the rope through the basket bolt and earrings, embedded in a heart-shaped ring after back, again with two wire card two way.
3.7.4 wire and turn buckle pull up at the same time, and earrings, on the other end of the hook and rope with big tightening, started from the middle, the wire rope is fixed on the hook, regulating screw make wire basket bolt looseness in conformity with the requirements.
3.7.5 within 50 m when the length of the wire rope, allowing only installed in the end turn buckle; Length of more than 50 m, shall be installed on both ends turn buckle; Every increase 50 m, length should be equipped with a flower basket bolt in the middle.
3.8 installation ground protection
After wire in place, at one end of the wire must be equipped with the apparent protection of ground wire, each flower basket bolts shall be well across the ground wire.
3.9 wire rope hoisting metal tube
3.9.1 choose metal pipe according to the design requirements, three links and five special bright with junction box, the corresponding specifications of the elevator.
3.9.2 when hoisting line, should be carried out in accordance with the mains before the order of the feeder, the processed pipes from beginning to end connected in sequence, connected to the junction box thread should twist and firm, into the box thread must not exceed 2 buckle. The elevator pitch should conform to the requirements for construction and acceptance standard. Each lamp box are used two elevator is fixed on the wire.
3.9.3 double-tube parallel segments, two elevator can be butt up lifting in the form of pipe and wire should be in the same plane.
3.9.4 hoisting overall earthing protection, should be done after finished the ends of the junction box across the ground wire.
3.10 wire rope hoisting plastic pipe
3.10.1 choose according to design requirements for plastic pipe, special match junction box and lamp box, pipe joint and the elevator.
3.10.2 pipe assembly method used for metal pipe assembly, tube into the box and lamp box, can use the connection pipe joint; Two pipe butt coupling available bonding method.
3.10.3 elevator should be fixed flat, elevator spacing should be uniform.
3.11 wire rope sling porcelain column (bead)
3.11.1 according to drawings, accurately measure lamp on the wire, the position of the hanger, and the amount of space between the fixed clamp, to make clearly marked colour paint.
3.11.2 response to processing the second line of homemade flat steel pylon and four wire type flat steel hanger for leveling, alignment, punch, then porcelain column (pearl) vertical flat, firmly fixed on the hanger.
3.11.3 will good porcelain column (pearl) hanger, in accordance with the identified the location of the screwed on the wire. On the wire hanger should not have skewed and loose phenomenon.
3.11.4 terminal hanger and fixed clamp connection must use galvanized stay strong.
3.11.5 porcelain column (pearl) and the installation of the scaffold provisions:
3.11.5.1 porcelain column (pearl) installation, with a hanger or support should be used in general not be less than 30 mm x 30 mm * 3 mm Angle or use should not less than 40 mm x 4 mm flat steel.
3.11.5.2 porcelain column (pearl) fixed to the roof boarding, sheathing thickness should not less than 20 mm.
3.11.5.3 porcelain column (pearl) wiring its support point spacing and allow the distance of the wire shall comply with the terms of table 3 to 30.
3.11.5.4 porcelain column (pearl) wiring conductor to the structure of the minimum distance should comply with the provisions of the table 3-31.
3.11.5.5 porcelain column (pearl) when its wiring insulation minimum distance from ground wires should comply with the provisions of the table 3-32.
3.12 wire rope sling sheathed wire:
3.12.1 according to drawings, measure the lamp on the wire and fixed point position. Will sheath line according to the period of cutting, straightening after on steel frame.
3.12.2 when installation should be started, at the end of the wire pay-off should be wire straighten out first, mark the location of the fixed point at the same time with aluminum clamp in general sheathed wire on the wire, until the end.
3.12.3 at 100 ~ 150 mm on both ends of the junction box should add fixed clamp, box conductor appropriate allowance shall be maintained.
3.12.4 lamps and lanterns for the light chain hoist, from wire junction box to the lamp holder should, in turn, fork in the chain hoist, wire should not be force. Chain hoist, melon seeds chain available plastic wire tie wire vertical on the chain hoist.
3.13 wire rope hoisting metal tube (plastic)
3.13.1 pipe threading: through mains lead can be directly by box, branch wire connector is located in the junction box or apparatus, lead may not appear.
3.13.2 wire connection: see section 3, 8, 3.8 the relevant content.
3.13.3 line inspection and insulating shake: see section 3, 8, 3.11 the relevant content.
4 quality standards
4.1 ensure projects:
4.4.1 wire terminal TAB must be strong, tension, adjusting device is complete; Wire rope with the end with a special card, the amount shall not be less than two, and use wire binding is firm.
4.1.2 wire and metal pipe, hanger must be reliable grounding protection, in the middle of the flower basket at both ends of the bolt and metal box across the ground wire should do.
Between 4.1.3 wires and wire to ground insulation resistance value must be greater than 0.5 M Ω.
Inspection method: to observe the examination.
4.2 the basic items:
The middle of the 2 wire fixed shall meet the following requirements: fixed point between the spacing is not more than 12 m; Hook the rope fixed firmly, derrick or other support point normal stress; Derrick is not skewed, paint is complete. Lifting point even, wire surface is clean, no rust, galvanized wire fixed point spacing is the same, the wire sag.
4.2.2 wire should be horizontal laying flat vertical, there should be no twisting, bending and insulation damage defects such as death. Across the building deformation joint, wire compensation allowance shall be maintained, sheathed wire and the wire through the place such as beam, wall, floor slab should be added when wear protection tube.
Holdings porcelain column (pearl) should be clean, no crack, the phenomenon such as breakage, complete installation cannot be reversed.
Inspection method: to observe the examination.
4.3 allowable deviation projects:
Wire rope piping layout and the allowable deviation inspection methods shall comply with the terms of table 3-33.
Wire rope piping layout of allowable deviation table 3-33
Will project allowable deviation (mm) test method
1 steel pipe wiring 30
2
A variety of piping, hard plastic tube wiring 20
3 support the distance between the plastic sheath line wiring 5
4 porcelain column wiring 30
5 finished product protection
5.1 in the process of electrical equipment installation, don't touch bad other equipment should be paid attention to and the structure of the doors and Windows, metope, ground, etc, and prevent will have apply good loose wires touch and broke.
5.2 after completion of piping, wiring, should not be allowed to spray, brush oil again, in order to avoid pollution wires and electrical appliances.
6 should pay attention to quality problems
6.1 wire hanging through large:
6.1.1 before hoisting rope is to pull out, after lifting the vertical drop generated through big. Should adjust turn buckle, make the wire sag is in line with installation requirements.
6.1.2 earrings interface not welding die, bearing graphite open after, spend big cause rope hanging. The earring outlet should be repair welding is firm.
Also 6.1.3 middle span is too large, resulting in vertical to spend. Should be adding lifting point as required.
6.2 wire do not protect the earth wire or protect the cross section of the ground wire is too small, should be in accordance with the ground claim do clear and reliable protection.
6.3 flat steel hanger not vertical, flat, fixed point is loose. Find is should be repaired in time.
6.4 the interval of flat steel hanger uneven, the difference is too big. Should be adjusted according to the specified requirements.
6.5 wire uneven, twisted and relaxation phenomena appear. Should be required to wire straighten out again after straightening binding firmly.
6.6 wire line core damage. Using electric knife cutting easy to damage when insulation wire core. You should use wire stripping pliers stripped wire insulation layer.
6.7 wire connection solder is not full, a virtual welding, the phenomenon such as slag. The temperature of the solder to appropriate, soldering to uniform. Rinse after tin should use cloth to wipe the excess solder in time, maintain the cleanness of joint part.
6.8 wire connector part of the guide layer is not close. Insulation bandaging, should use rubber insulation tape or sticky plastic insulation tape half range overlap closely after dressing, half range overlap bandage tightly with black tape again.
6.9 wire through the wall, the place such as beam, floor slab without wear protection tube. Should take effective remedial measures.
6.10 steel pipe or steel wire tube nozzle is not smooth; Simmer bending ratio is not enough, concave flat to spend. Nozzle of burr should be file up to simmer bending. Replace the concave flat through the large pipe.
6.11 plastic pipe eccentricity have discoloration, socket and concave phenomenon such as flat to spend. Should be replaced to find socket, concave flat and quality don't meet requirement of the pipe.
6.12 sheathed wire wiring poor flatness, aluminum wire clamp not firm, make the relaxation degree of inconsistency of wire or wires local bending. Should straighten wires after fixed.
6.13 through the wall sheathed wire was put on the wall. Should do for protecting tube before wiring.
6.14 piping, box material does not accord with pipes. Metal pipe should choose metal box, plastic pipe should choose plastic box.
7 quality records
7.1 insulation wire, plastic sheath line products certification.
7.2 wire rope piping, wiring project engineering, self-inspection, mutual inspection records.
7.3 design changes regarding the record, record drawings.
7.4 wiring in wire component project quality inspection records.
7.5 electrical insulation resistance test records.
1 scope
The technology standard is applicable to indoor lighting wire rope piping, wiring project.
2 construction preparation
2.1 material requirements:
2.1.1 insulated wires: specification, type of the wire must comply with the design requirements, and product certification.
2.1.2 wire: the steel hinge line as a wire, its cross-sectional area should choose according to actual span, load and mechanical strength, minimum cross section is not less than 10 was. And can not have back clasp, pine, shares, the phenomenon such as cramping. If use galvanized round steel as a wire, its diameter should not less than 10 mm.
2.1.3 galvanized round steel hook: the diameter of the round steel should not be less than 5 mm.
2.1.4 galvanized round steel earrings: round steel should not be less than 10 mm in diameter. Earring hole diameter should not less than 30 mm, joints shall be welded to death, the end should be bent into a dovetail.
2.1.5 galvanized iron wire: no back button should be straight, twist to wait for a phenomenon, and has stipulated mechanical strain.
2.1.6 flat steel hanger: should use galvanized flat steel, the thickness should be not less than 1.5 mm, width should be not less than 20 mm, the galvanized layer falls off phenomenon.
2.1.7 tie line: should be used with conductor wire core material of plastic insulation cable tie.
2.1.8 plastic sheath line: specification, type of the wire must comply with the design requirements, and product certification.
2.1.9 screw connection button: should choose according to wire section and the root of the wire number corresponding models of spiral wire reinforced insulation steel shell button.
2.1.10 LC secure cap pressure for requirement, please see section 3, 8, 3.5 the relevant content.
2.1.11: casing pipe with copper, aluminum casing pipe and copper aluminum casing three transition, when choose, should adopt corresponding casing with conductor material specifications.
2.1.12 terminal (wiring nose) : when choose, should choose according to conductor is the root of the number and the total cross section corresponding specifications of the terminal.
2.1.13 iron box: screw holes installation is complete, the threading is clear, fastening screws should be 5 mm in diameter. Box should not be split, deformation, damage, galvanized layer and anticorrosive paint complete don't fall off.
2.1.14 plastic box packing: suitable for plastic tube Ming fu wiring project, the material should be evenly split, box no damage such as deformation, discoloration phenomenon.
2.1.15 galvanized material: flower basket bolt, wire rope clip, heart-shaped ring, flat steel, round steel, Angle steel, machine screw, nut, spring washer, gasket, iron hoop, square pad.
2.1.16 auxiliary materials; Rubber insulating tape, glue plastic insulation tape, black tape, welding electrode, solder, flux, aluminum clamp, oxygen, acetylene, antirust paint, mixed paint, emery cloth, etc. Material should not be affected with damp be affected with damp, the phenomenon such as metamorphic date.
2.2 the main equipment:
2.2.1 pencil line, tape measure, spirit level, fall, chalk line bag, barrel, brush.
2.2.2 hammer and chisel, hacksaw, saw blade, flat file, round file, half round file, sets of wire board, bit.
2.2.3 sawing grinding wheel, grinding wheel, saw blade, set machine, cutter, electric welding machine, heat pipe, hydraulic stewed pig, welding tools, pressure case.
2.2.4 soldering iron, electric furnace, tin tin pot, spoon, rope, pulley, chain, tube teeth, megohmmeter, tool bag, toolbox, high stool, etc.
2.3 operation conditions:
2.3.1 while cooperate with civil engineering structure construction, iron and reserved holes will be well kept.
Cooperate with construction decoration in 2.3.2 rope hoisting and piping, wiring.
3 operation process
3.2 wire wiring regulations and requirements:
3.2.1 wire insulation on the wires to the distance of the ground, indoors is 2.5 m.
3.2.2 indoor cable wiring insulation wire Ming fu, porcelain (plastic) should be adopted or knob insulator, pin insulator fixed; Using sheathed wire, metal or hard plastic tube wiring, can be directly fixed on the wire.
3.2.3 cable wiring of the wire and steel strand used in cross section, should choose according to span, load and mechanical strength, minimum cross section should not be less than 10 was. The wire rope fixed should brush anti-rust paint or use galvanized parts. The ends of the wire rope should be taut, when large span should increase support point in the middle, intermediate support point spacing should be not more than 12 m.
3.2.4 on the wire rope hoisting metal or plastic tube wiring, shall meet the following requirements:
3.2.4.1 rope hoisting metal or plastic pipe support points on the largest spacing are shown in table 3-29.
The largest spacing between support points table 3-29
Cabling supporting point distance (mm) support point away from the lamp holder box (mm)
Metal tube
Plastic material tube 1500
1000, 200,
150
3.2.4.2 of flat steel hoisting box and pipeline clamp should not be less than 20 mm, the width of hoisting box the number of the clamp should not be less than 2.
3.2.5 rope hoisting sheathed on the line, shall meet the following requirements:
3.2.5.1 with aluminum clamp straight when apply on the wire, the support point spacing should be not greater than 50 mm; Clamp the distance from the junction box should not be greater than 100 mm.
3.2.5.2 with rubber or plastic sheath, junction box should be used in plastic products.
3.2.6 rope hoisting porcelain, shall meet the following requirements:
3.2.6.1 support point spacing should not be more than 1.5 m, the distance between the inside line should not be less than 50 mm, outside of the distance between the line should not be less than 100 mm.
3.2.6.2 flat steel bars of the terminal should be gallas line, its diameter should not less than 3 mm.
3.3 precast processing artifacts:
3.3.1 processing embedded iron: its size should not be less than 120 * 60 * 6 mm; Welding on the iron anchor reinforced its diameter should not less than 8 mm, its tail to bend into dovetail shape.
3.3.2 rainfall distribution on 10-12 dimension processing according to the requirement of the design framework of reserved holes; Processing good hoop, bracket, hanger, hanger, earrings, such as fixed clamp galvanized iron pieces. Non galvanized iron parts should be cleaning brush again on the antirust paint.
3.3.3 steel pipe or conduit for straightening. Cut off, set of wire, heat bending, prepare for pipe connection.
3.3.4 plastic tube for heat pipe, tube, to be prepared for the pipeline connection.
3.3.5 are made of galvanized steel strand button round steel as a wire, according to the actual length of cut required, wipe the surface of oil, to straighten it in advance, in order to reduce the elongation.
3.4 embedded iron and reserved holes:
Should be based on the size of the drawings marked position, in the civil engineering structure construction to fasten on embedded parts; And comply with civil accurately will leave good holes.
3.5 play line positioning:
According to plans determine the position of the fixed point, pop-up chalk line, even separated span, and make clearly marked colour paint.
3.6 the brackets:
Will have been processed to embrace hoop bracket on the structure, wear the heart-shaped ring set on the earrings and basket bolt used in hoisting rope. Fixed good bracket can be as the beginning of the line, middle and end.
3.7 wire assembly:
3.7.1 will pull out good wire rope end through the earrings in advance, and back to wear the ring into the heart, with two wire card 2 again. In order to prevent the loose end of a wire, iron wire available to tighten it.
3.7.2 will flower basket at the ends of the bolt screw nut of precession, keep its maximum range, and be ready to continue to adjust the wire rope looseness.
3.7.3 dismantle the wire will be tied to the end of a rope, the rope through the basket bolt and earrings, embedded in a heart-shaped ring after back, again with two wire card two way.
3.7.4 wire and turn buckle pull up at the same time, and earrings, on the other end of the hook and rope with big tightening, started from the middle, the wire rope is fixed on the hook, regulating screw make wire basket bolt looseness in conformity with the requirements.
3.7.5 within 50 m when the length of the wire rope, allowing only installed in the end turn buckle; Length of more than 50 m, shall be installed on both ends turn buckle; Every increase 50 m, length should be equipped with a flower basket bolt in the middle.
3.8 installation ground protection
After wire in place, at one end of the wire must be equipped with the apparent protection of ground wire, each flower basket bolts shall be well across the ground wire.
3.9 wire rope hoisting metal tube
3.9.1 choose metal pipe according to the design requirements, three links and five special bright with junction box, the corresponding specifications of the elevator.
3.9.2 when hoisting line, should be carried out in accordance with the mains before the order of the feeder, the processed pipes from beginning to end connected in sequence, connected to the junction box thread should twist and firm, into the box thread must not exceed 2 buckle. The elevator pitch should conform to the requirements for construction and acceptance standard. Each lamp box are used two elevator is fixed on the wire.
3.9.3 double-tube parallel segments, two elevator can be butt up lifting in the form of pipe and wire should be in the same plane.
3.9.4 hoisting overall earthing protection, should be done after finished the ends of the junction box across the ground wire.
3.10 wire rope hoisting plastic pipe
3.10.1 choose according to design requirements for plastic pipe, special match junction box and lamp box, pipe joint and the elevator.
3.10.2 pipe assembly method used for metal pipe assembly, tube into the box and lamp box, can use the connection pipe joint; Two pipe butt coupling available bonding method.
3.10.3 elevator should be fixed flat, elevator spacing should be uniform.
3.11 wire rope sling porcelain column (bead)
3.11.1 according to drawings, accurately measure lamp on the wire, the position of the hanger, and the amount of space between the fixed clamp, to make clearly marked colour paint.
3.11.2 response to processing the second line of homemade flat steel pylon and four wire type flat steel hanger for leveling, alignment, punch, then porcelain column (pearl) vertical flat, firmly fixed on the hanger.
3.11.3 will good porcelain column (pearl) hanger, in accordance with the identified the location of the screwed on the wire. On the wire hanger should not have skewed and loose phenomenon.
3.11.4 terminal hanger and fixed clamp connection must use galvanized stay strong.
3.11.5 porcelain column (pearl) and the installation of the scaffold provisions:
3.11.5.1 porcelain column (pearl) installation, with a hanger or support should be used in general not be less than 30 mm x 30 mm * 3 mm Angle or use should not less than 40 mm x 4 mm flat steel.
3.11.5.2 porcelain column (pearl) fixed to the roof boarding, sheathing thickness should not less than 20 mm.
3.11.5.3 porcelain column (pearl) wiring its support point spacing and allow the distance of the wire shall comply with the terms of table 3 to 30.
3.11.5.4 porcelain column (pearl) wiring conductor to the structure of the minimum distance should comply with the provisions of the table 3-31.
3.11.5.5 porcelain column (pearl) when its wiring insulation minimum distance from ground wires should comply with the provisions of the table 3-32.
3.12 wire rope sling sheathed wire:
3.12.1 according to drawings, measure the lamp on the wire and fixed point position. Will sheath line according to the period of cutting, straightening after on steel frame.
3.12.2 when installation should be started, at the end of the wire pay-off should be wire straighten out first, mark the location of the fixed point at the same time with aluminum clamp in general sheathed wire on the wire, until the end.
3.12.3 at 100 ~ 150 mm on both ends of the junction box should add fixed clamp, box conductor appropriate allowance shall be maintained.
3.12.4 lamps and lanterns for the light chain hoist, from wire junction box to the lamp holder should, in turn, fork in the chain hoist, wire should not be force. Chain hoist, melon seeds chain available plastic wire tie wire vertical on the chain hoist.
3.13 wire rope hoisting metal tube (plastic)
3.13.1 pipe threading: through mains lead can be directly by box, branch wire connector is located in the junction box or apparatus, lead may not appear.
3.13.2 wire connection: see section 3, 8, 3.8 the relevant content.
3.13.3 line inspection and insulating shake: see section 3, 8, 3.11 the relevant content.
4 quality standards
4.1 ensure projects:
4.4.1 wire terminal TAB must be strong, tension, adjusting device is complete; Wire rope with the end with a special card, the amount shall not be less than two, and use wire binding is firm.
4.1.2 wire and metal pipe, hanger must be reliable grounding protection, in the middle of the flower basket at both ends of the bolt and metal box across the ground wire should do.
Between 4.1.3 wires and wire to ground insulation resistance value must be greater than 0.5 M Ω.
Inspection method: to observe the examination.
4.2 the basic items:
The middle of the 2 wire fixed shall meet the following requirements: fixed point between the spacing is not more than 12 m; Hook the rope fixed firmly, derrick or other support point normal stress; Derrick is not skewed, paint is complete. Lifting point even, wire surface is clean, no rust, galvanized wire fixed point spacing is the same, the wire sag.
4.2.2 wire should be horizontal laying flat vertical, there should be no twisting, bending and insulation damage defects such as death. Across the building deformation joint, wire compensation allowance shall be maintained, sheathed wire and the wire through the place such as beam, wall, floor slab should be added when wear protection tube.
Holdings porcelain column (pearl) should be clean, no crack, the phenomenon such as breakage, complete installation cannot be reversed.
Inspection method: to observe the examination.
4.3 allowable deviation projects:
Wire rope piping layout and the allowable deviation inspection methods shall comply with the terms of table 3-33.
Wire rope piping layout of allowable deviation table 3-33
Will project allowable deviation (mm) test method
1 steel pipe wiring 30
2
A variety of piping, hard plastic tube wiring 20
3 support the distance between the plastic sheath line wiring 5
4 porcelain column wiring 30
5 finished product protection
5.1 in the process of electrical equipment installation, don't touch bad other equipment should be paid attention to and the structure of the doors and Windows, metope, ground, etc, and prevent will have apply good loose wires touch and broke.
5.2 after completion of piping, wiring, should not be allowed to spray, brush oil again, in order to avoid pollution wires and electrical appliances.
6 should pay attention to quality problems
6.1 wire hanging through large:
6.1.1 before hoisting rope is to pull out, after lifting the vertical drop generated through big. Should adjust turn buckle, make the wire sag is in line with installation requirements.
6.1.2 earrings interface not welding die, bearing graphite open after, spend big cause rope hanging. The earring outlet should be repair welding is firm.
Also 6.1.3 middle span is too large, resulting in vertical to spend. Should be adding lifting point as required.
6.2 wire do not protect the earth wire or protect the cross section of the ground wire is too small, should be in accordance with the ground claim do clear and reliable protection.
6.3 flat steel hanger not vertical, flat, fixed point is loose. Find is should be repaired in time.
6.4 the interval of flat steel hanger uneven, the difference is too big. Should be adjusted according to the specified requirements.
6.5 wire uneven, twisted and relaxation phenomena appear. Should be required to wire straighten out again after straightening binding firmly.
6.6 wire line core damage. Using electric knife cutting easy to damage when insulation wire core. You should use wire stripping pliers stripped wire insulation layer.
6.7 wire connection solder is not full, a virtual welding, the phenomenon such as slag. The temperature of the solder to appropriate, soldering to uniform. Rinse after tin should use cloth to wipe the excess solder in time, maintain the cleanness of joint part.
6.8 wire connector part of the guide layer is not close. Insulation bandaging, should use rubber insulation tape or sticky plastic insulation tape half range overlap closely after dressing, half range overlap bandage tightly with black tape again.
6.9 wire through the wall, the place such as beam, floor slab without wear protection tube. Should take effective remedial measures.
6.10 steel pipe or steel wire tube nozzle is not smooth; Simmer bending ratio is not enough, concave flat to spend. Nozzle of burr should be file up to simmer bending. Replace the concave flat through the large pipe.
6.11 plastic pipe eccentricity have discoloration, socket and concave phenomenon such as flat to spend. Should be replaced to find socket, concave flat and quality don't meet requirement of the pipe.
6.12 sheathed wire wiring poor flatness, aluminum wire clamp not firm, make the relaxation degree of inconsistency of wire or wires local bending. Should straighten wires after fixed.
6.13 through the wall sheathed wire was put on the wall. Should do for protecting tube before wiring.
6.14 piping, box material does not accord with pipes. Metal pipe should choose metal box, plastic pipe should choose plastic box.
7 quality records
7.1 insulation wire, plastic sheath line products certification.
7.2 wire rope piping, wiring project engineering, self-inspection, mutual inspection records.
7.3 design changes regarding the record, record drawings.
7.4 wiring in wire component project quality inspection records.
7.5 electrical insulation resistance test records.
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