Overhead line cord
1 scope
This technology standard applied to 10 kv and below cord installation of overhead distribution lines.
2 construction preparation
2.1 material requirements:
2.1.1 adopted by the equipment and materials should comply with the regulations on technical standards for existing state, and shall have the product certification.
2.1.2 steel strand:
2.1.2.1 there should be no loose strands, cross, folding, fracture and damage defects.
2.1.2.2 galvanized is good, no corrosion phenomenon.
2.1.2.3 minimum cross section should be less than 25 was.
2.1.2.4 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.3 galvanized iron wire:
2.1.3.1 should not have dead turn, fracture and damage defects.
2.1.3.2 galvanized is good, should not be rust.
2.1.3.3 guy lines with wire should not be less than 4.0 mm in diameter, intertwined with the wire diameter should not less than 3.2 mm.
2.1.4 anchor rod:
2.1.4.1 shall not have died bent, broken, sand holes, such as bubble defects.
2.1.4.2 galvanized is good, should not be rust.
2.1.4 3 minimum diameter should not less than 16 mm.
2.1.4.4 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.5 concrete anchor plate
2.1.5.1 precast concrete anchor plate of honeycomb, surface should not have, cracks and other defects, strength should meet the design requirements.
2.1.5.2 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.6 stay insulator
2.1.6.1 porcelain glaze is smooth, no cracks, lack of glaze, spots, burn mark and defects such as bubble or enamel burn out.
2.1.6.2 ac withstand voltage test of high voltage insulator results must comply with the rules and regulations of construction.
2.1.6.3 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.7 anchor hoop, UT type clamp, wedge clamp, flower basket bolt, double wire plate, parallel hangs Taiwan, u-shaped hangs Taiwan, heart-shaped ring, steel wire, steel casing, etc.
2.1.7.1 surface should be smooth, no crack, burr, flash, such as mortar, bubble eye defects.
2.1.7.2 should be hot dip galvanized, and galvanized is good, no galvanized layer spalling corrosion phenomenon.
2.1.8 bolts:
2.1.8.1 bolt surface should not have crack, sand holes, the phenomenon such as zinc layer spalling and corrosion.
With the 2.1.8.2 screw and nut should be good. Increase the size of the internal thread with a coating of the external thread, the tolerance should be consistent with existing national standards "common thread 1 ~ 300 mm diameter tolerance of coarse thread level 3 standards.
2.1.8.3 bolt should have a locking device, locking device elastic should be appropriate, thickness should comply with the rules.
2.1.9 other materials: bamboo, asphalt, oil casing, paint, glass cloth, etc.
2.2 the main machine
2.2.1 iron milling, ram, tightener, wire cutters.
2.2.2 chain, adjustable wrench, climbers, seat belts, and so on.
2.3 operation conditions
2.3.1 various material prepare, the pole group set to complete.
2.3.2 ac withstand voltage test of high voltage insulator has been completed, and in accordance with the rules and regulations of construction.
3 operation process
3.1 process:
Thread cutting - stay combined production and installation
3.2 wire cutting:
3.2.1 according to the specifications and design requirements, stay on determination of farrowing combination, middle and bottom of the length and number of shares. Each combined the lead wire of the number of shares shall be not less than three, at the end of the number of shares shall be, the more than two stocks.
3.2.2 when using galvanized iron wire, should first pull out in; When using the steel strand, should be on both sides of the need to break in with lead wire winding. Then.
3.3 wire combinations:
3.3.1 use galvanized iron wire, galvanized iron wire should be ground into a partnership. Hank timeliness, should make a lead wire stress is consistent, even twisted.
3.3.2 rainfall distribution on 10-12, middle and bottom on the joint simmer button nose ring, stay insulator installation, winding.
General concrete pole guy don't furnish stay insulator, but through the wire thread and horizontal stay should furnish the insulator. In the case of disconnection, stay insulator should not be less than 2.5 m off the ground.
Thread connection coil, fixed shall meet the following requirements:
3.3.2.1 lead wire cord can be wrapped around a fixed itself, and in the end of the joint can be another apply lead wire winding, winding should be neat, tight, winding order, number of turns and length are shown in table 3-72.
Winding order, number of turns and the length of the table 3-73
The number of shares in connection with the bottom coil length minimum value (mm)
Its winding order, turns the end spend around the end
3
5
7 and 9, 8, 7
9, 9, 8, 8, 7
9, 9, 8, 8, 7, 7, 6, 150
150
200, 250,
250
300, 100,
100
100
3.3.2.2 steel strand wire can use rope card or lead wire winding is fixed.
Using a steel wire card fixed, each end connection shall not be less than two steel line card. The bottom should not be used alone in the steel wire fixed card, also lead wire winding is fixed.
B use lead wire winding, winding neat, tight, winding length are shown in table 3-74.
Winding length minimum value in table 3-74
Winding length (mm)
The ends of the top of the steel strand of section insulator in the connection with the bottom
The end spend around the end
25
35
50, 200
250
300, 200,
250
300, 150,
200
250, 250,
300
250, 80,
80
80
3.3.2.3 use UT type clamp, wedge clamp, clamp the tongue plate should be closely contact with anchor force after no sliding phenomenon. Arrows at the broken ends and pull the main line should be reliable fixed (can use lead wire coil).
3.3.2.4 UT type clamp or basket bolt screw should be dew clasp, and should not be less than l / 2 length of screw thread to tighten. Clamp (wedge type) double nut should be adjusted UT and tight, should cementing basket bolt (can use lead wire coil).
3.3.2.5 pull rod connected to the panel, the lead wire winding ring opening application or welding; When the anchor bar and anchor plate using a screw connection, should pad square washer, and double nut is fixed. Connection rod outcrop length is 500 ~ 700 mm.
3.3.2.6 button nose ring at the ends of the thread should be good mat heart-shaped ring.
3.4 wire installation:
3.4.1 track will have been installed at the bottom of the anchor plate into a pit, alignment, layered fill compaction. Use arrows to embrace hoop will pull the upper end fixed on the pole.
Anchor installation shall meet the following requirements:
3.4.1.1 stay with pole Angle should not be less than 45 °, when restricted by environment, should not be less than 30 °. Pendant line horizontal stay of pile and anchor rod should be not less than 30 ° Angle.
3.4.1.2 terminal screw and rod bearing should stay with the line direction of freeze-thaw resistance is; Points Angle cord should be with line horn line direction for; Vertical wind should stay with line direction.
3.4.1.3 buried depth of anchor plate minimum should not be less than 1.3 m, and should meet the design requirements.
3.4.1.4 levels stay buried depth of anchor rod should not be less than 1/6 long, pull the vertical distance from the center of the road should not be less than 6 m, pull pendant line of piles and pile pole should be not less than 30 ° Angle, anchor rod should be tilted the opposite direction to the tension 10 ° ~ 20 °, the top drop line from the peak should be 250 mm; Horizontal stay to open to traffic on the edge of the road surface vertical distance should not be less than 5 m..
3.4.1.5 when a guy is located in the traffic arteries or accessible place, must be equipped with bamboo casing protection. Bamboo tube from the upper vertical ground should not be less than 1.8 m, and should be coated with clear sign (e.g., red, white and white paint).
3.4.2 the installation of the poles, embedded depth of poles should not be less than 0.5 m, with heavy prevention measures. Between the poles and the main pole Angle should be 30 °, allowable deviation of plus or minus 5 °.
Rule 3.4.3, bottom of the thread connection. Can use tightener taut wire, and makes the terminal bar and Angle pole asked pull side tilt, should guarantee the tight line after the end of rod and to pull side Angle pole tilt is not more than one pole diameter; Horizontal stay of anchor rod tension in the opposite direction to the tilt 15 ° ~ 20 °.
4 quality standards
4.1 ensure projects:
4.4.1 hardware specifications, models, quality must meet the design requirements. Ac withstand voltage test of high voltage insulator results must comply with the rules and regulations of construction.
Methods: to observe the inspection, pressure test record check factory certification and insulator.
High voltage insulator surface is strictly forbidden to 4.1.2 defects such as cracks, defects, enamel burn out.
Inspection method: to observe the examination.
4.2 the basic items:
2 black metal anti-corrosion protection complete hardware parts.
Inspection method: to observe the examination.
4.2.2 anchor position and pole of right Angle, hardware is complete, the connection is firm, with every pull rod are stress is normal, no loose, shares and cramp.
Test method: observation, the lever to check.
Holdings anti-settling TuTai correct size, wire pole tip after tight line no significant deviation.
Inspection method: to observe the examination.
4.3 allowable deviation project (table 3-75)
Bearing bar verticality deviation table allowed 3-75
Will project allowable deviation checking method
1 after the pull force rod or Angle pole terminal verticality
(that is, to pull rod tip side slope displacement) 1 d theodolite or stay, feet quantity check
Note: D for pole tip diameter.
5 finished product protection
5.1 stay after making should be properly kept, prevent car pressure deformation, etc.
5.2 the transportation, pay attention to prevent damage of twisted wire and stay insulator.
5.3 straighten the lead wire, should not damage trees, etc.
6 should pay attention to quality problems
6.1 pull wire twisted uneven or have a cramp. Wire bent after not straighten or straighten, ground knowing each wire should be consistent force.
6.2 wire winding circle number, do not close enough, button nose ring is too big. The length of the winding wire should have enough; Wound carefully, and forcibly even, make the wire does not rebound; Make button nose ring to the right way, had enough, exert oneself to do STH.
6.3 wire after erection, the terminal bar, Angle bar verticality is beyond the rules. Anchor installation, drawing to moderate elastic adjustment.
7 quality records
7.1 steel wire, galvanized iron wire, concrete anchor plate shall be manufactured products quality certificate.
7.2 stay insulator, high voltage wiring insulator due and the factory quality certificate, and have a test report.
7.3 pull installation engineering, self-inspection record.
7.4 design changes regarding the record, record drawings.
7.5 engineering should fill in overhead line and rod breakdown electric equipment installation engineering quality inspection records.
1 scope
This technology standard applied to 10 kv and below cord installation of overhead distribution lines.
2 construction preparation
2.1 material requirements:
2.1.1 adopted by the equipment and materials should comply with the regulations on technical standards for existing state, and shall have the product certification.
2.1.2 steel strand:
2.1.2.1 there should be no loose strands, cross, folding, fracture and damage defects.
2.1.2.2 galvanized is good, no corrosion phenomenon.
2.1.2.3 minimum cross section should be less than 25 was.
2.1.2.4 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.3 galvanized iron wire:
2.1.3.1 should not have dead turn, fracture and damage defects.
2.1.3.2 galvanized is good, should not be rust.
2.1.3.3 guy lines with wire should not be less than 4.0 mm in diameter, intertwined with the wire diameter should not less than 3.2 mm.
2.1.4 anchor rod:
2.1.4.1 shall not have died bent, broken, sand holes, such as bubble defects.
2.1.4.2 galvanized is good, should not be rust.
2.1.4 3 minimum diameter should not less than 16 mm.
2.1.4.4 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.5 concrete anchor plate
2.1.5.1 precast concrete anchor plate of honeycomb, surface should not have, cracks and other defects, strength should meet the design requirements.
2.1.5.2 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.6 stay insulator
2.1.6.1 porcelain glaze is smooth, no cracks, lack of glaze, spots, burn mark and defects such as bubble or enamel burn out.
2.1.6.2 ac withstand voltage test of high voltage insulator results must comply with the rules and regulations of construction.
2.1.6.3 should accord with a country or enterprise in the present technical standard, and have qualified certificates.
2.1.7 anchor hoop, UT type clamp, wedge clamp, flower basket bolt, double wire plate, parallel hangs Taiwan, u-shaped hangs Taiwan, heart-shaped ring, steel wire, steel casing, etc.
2.1.7.1 surface should be smooth, no crack, burr, flash, such as mortar, bubble eye defects.
2.1.7.2 should be hot dip galvanized, and galvanized is good, no galvanized layer spalling corrosion phenomenon.
2.1.8 bolts:
2.1.8.1 bolt surface should not have crack, sand holes, the phenomenon such as zinc layer spalling and corrosion.
With the 2.1.8.2 screw and nut should be good. Increase the size of the internal thread with a coating of the external thread, the tolerance should be consistent with existing national standards "common thread 1 ~ 300 mm diameter tolerance of coarse thread level 3 standards.
2.1.8.3 bolt should have a locking device, locking device elastic should be appropriate, thickness should comply with the rules.
2.1.9 other materials: bamboo, asphalt, oil casing, paint, glass cloth, etc.
2.2 the main machine
2.2.1 iron milling, ram, tightener, wire cutters.
2.2.2 chain, adjustable wrench, climbers, seat belts, and so on.
2.3 operation conditions
2.3.1 various material prepare, the pole group set to complete.
2.3.2 ac withstand voltage test of high voltage insulator has been completed, and in accordance with the rules and regulations of construction.
3 operation process
3.1 process:
Thread cutting - stay combined production and installation
3.2 wire cutting:
3.2.1 according to the specifications and design requirements, stay on determination of farrowing combination, middle and bottom of the length and number of shares. Each combined the lead wire of the number of shares shall be not less than three, at the end of the number of shares shall be, the more than two stocks.
3.2.2 when using galvanized iron wire, should first pull out in; When using the steel strand, should be on both sides of the need to break in with lead wire winding. Then.
3.3 wire combinations:
3.3.1 use galvanized iron wire, galvanized iron wire should be ground into a partnership. Hank timeliness, should make a lead wire stress is consistent, even twisted.
3.3.2 rainfall distribution on 10-12, middle and bottom on the joint simmer button nose ring, stay insulator installation, winding.
General concrete pole guy don't furnish stay insulator, but through the wire thread and horizontal stay should furnish the insulator. In the case of disconnection, stay insulator should not be less than 2.5 m off the ground.
Thread connection coil, fixed shall meet the following requirements:
3.3.2.1 lead wire cord can be wrapped around a fixed itself, and in the end of the joint can be another apply lead wire winding, winding should be neat, tight, winding order, number of turns and length are shown in table 3-72.
Winding order, number of turns and the length of the table 3-73
The number of shares in connection with the bottom coil length minimum value (mm)
Its winding order, turns the end spend around the end
3
5
7 and 9, 8, 7
9, 9, 8, 8, 7
9, 9, 8, 8, 7, 7, 6, 150
150
200, 250,
250
300, 100,
100
100
3.3.2.2 steel strand wire can use rope card or lead wire winding is fixed.
Using a steel wire card fixed, each end connection shall not be less than two steel line card. The bottom should not be used alone in the steel wire fixed card, also lead wire winding is fixed.
B use lead wire winding, winding neat, tight, winding length are shown in table 3-74.
Winding length minimum value in table 3-74
Winding length (mm)
The ends of the top of the steel strand of section insulator in the connection with the bottom
The end spend around the end
25
35
50, 200
250
300, 200,
250
300, 150,
200
250, 250,
300
250, 80,
80
80
3.3.2.3 use UT type clamp, wedge clamp, clamp the tongue plate should be closely contact with anchor force after no sliding phenomenon. Arrows at the broken ends and pull the main line should be reliable fixed (can use lead wire coil).
3.3.2.4 UT type clamp or basket bolt screw should be dew clasp, and should not be less than l / 2 length of screw thread to tighten. Clamp (wedge type) double nut should be adjusted UT and tight, should cementing basket bolt (can use lead wire coil).
3.3.2.5 pull rod connected to the panel, the lead wire winding ring opening application or welding; When the anchor bar and anchor plate using a screw connection, should pad square washer, and double nut is fixed. Connection rod outcrop length is 500 ~ 700 mm.
3.3.2.6 button nose ring at the ends of the thread should be good mat heart-shaped ring.
3.4 wire installation:
3.4.1 track will have been installed at the bottom of the anchor plate into a pit, alignment, layered fill compaction. Use arrows to embrace hoop will pull the upper end fixed on the pole.
Anchor installation shall meet the following requirements:
3.4.1.1 stay with pole Angle should not be less than 45 °, when restricted by environment, should not be less than 30 °. Pendant line horizontal stay of pile and anchor rod should be not less than 30 ° Angle.
3.4.1.2 terminal screw and rod bearing should stay with the line direction of freeze-thaw resistance is; Points Angle cord should be with line horn line direction for; Vertical wind should stay with line direction.
3.4.1.3 buried depth of anchor plate minimum should not be less than 1.3 m, and should meet the design requirements.
3.4.1.4 levels stay buried depth of anchor rod should not be less than 1/6 long, pull the vertical distance from the center of the road should not be less than 6 m, pull pendant line of piles and pile pole should be not less than 30 ° Angle, anchor rod should be tilted the opposite direction to the tension 10 ° ~ 20 °, the top drop line from the peak should be 250 mm; Horizontal stay to open to traffic on the edge of the road surface vertical distance should not be less than 5 m..
3.4.1.5 when a guy is located in the traffic arteries or accessible place, must be equipped with bamboo casing protection. Bamboo tube from the upper vertical ground should not be less than 1.8 m, and should be coated with clear sign (e.g., red, white and white paint).
3.4.2 the installation of the poles, embedded depth of poles should not be less than 0.5 m, with heavy prevention measures. Between the poles and the main pole Angle should be 30 °, allowable deviation of plus or minus 5 °.
Rule 3.4.3, bottom of the thread connection. Can use tightener taut wire, and makes the terminal bar and Angle pole asked pull side tilt, should guarantee the tight line after the end of rod and to pull side Angle pole tilt is not more than one pole diameter; Horizontal stay of anchor rod tension in the opposite direction to the tilt 15 ° ~ 20 °.
4 quality standards
4.1 ensure projects:
4.4.1 hardware specifications, models, quality must meet the design requirements. Ac withstand voltage test of high voltage insulator results must comply with the rules and regulations of construction.
Methods: to observe the inspection, pressure test record check factory certification and insulator.
High voltage insulator surface is strictly forbidden to 4.1.2 defects such as cracks, defects, enamel burn out.
Inspection method: to observe the examination.
4.2 the basic items:
2 black metal anti-corrosion protection complete hardware parts.
Inspection method: to observe the examination.
4.2.2 anchor position and pole of right Angle, hardware is complete, the connection is firm, with every pull rod are stress is normal, no loose, shares and cramp.
Test method: observation, the lever to check.
Holdings anti-settling TuTai correct size, wire pole tip after tight line no significant deviation.
Inspection method: to observe the examination.
4.3 allowable deviation project (table 3-75)
Bearing bar verticality deviation table allowed 3-75
Will project allowable deviation checking method
1 after the pull force rod or Angle pole terminal verticality
(that is, to pull rod tip side slope displacement) 1 d theodolite or stay, feet quantity check
Note: D for pole tip diameter.
5 finished product protection
5.1 stay after making should be properly kept, prevent car pressure deformation, etc.
5.2 the transportation, pay attention to prevent damage of twisted wire and stay insulator.
5.3 straighten the lead wire, should not damage trees, etc.
6 should pay attention to quality problems
6.1 pull wire twisted uneven or have a cramp. Wire bent after not straighten or straighten, ground knowing each wire should be consistent force.
6.2 wire winding circle number, do not close enough, button nose ring is too big. The length of the winding wire should have enough; Wound carefully, and forcibly even, make the wire does not rebound; Make button nose ring to the right way, had enough, exert oneself to do STH.
6.3 wire after erection, the terminal bar, Angle bar verticality is beyond the rules. Anchor installation, drawing to moderate elastic adjustment.
7 quality records
7.1 steel wire, galvanized iron wire, concrete anchor plate shall be manufactured products quality certificate.
7.2 stay insulator, high voltage wiring insulator due and the factory quality certificate, and have a test report.
7.3 pull installation engineering, self-inspection record.
7.4 design changes regarding the record, record drawings.
7.5 engineering should fill in overhead line and rod breakdown electric equipment installation engineering quality inspection records.
No comments:
Post a Comment