CN103806740B - Insertion type erection method for electrified pole - Google Patents
Insertion type erection method for electrified pole Download PDFInfo
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- CN103806740B CN103806740B CN201310682455.1A CN201310682455A CN103806740B CN 103806740 B CN103806740 B CN 103806740B CN 201310682455 A CN201310682455 A CN 201310682455A CN 103806740 B CN103806740 B CN 103806740B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000003780 insertion Methods 0.000 title abstract description 5
- 230000037431 insertion Effects 0.000 title abstract description 5
- 238000009413 insulation Methods 0.000 claims abstract description 58
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000002955 isolation Methods 0.000 claims description 27
- 239000012212 insulator Substances 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses an insertion type erection method for an electrified pole. The insertion type erection method for the electrified pole comprises the following steps that (1) an insulation shielding portion is built; (2) live wires are separated in a supported mode by using a wire transverse insulating supporting rod; (3) erection of the electric pole is carried out, an electrician on the ground carries out earth covering after the electric pole enters a hole, and the relative position of the electric pole and the wires and the angle between the electric pole and the wire are determined, and the electric pole cannot be separated from an insulating steel wire rope of a crane until the electric pole is covered with two thirds quantity of soil needed by earth covering; (4) cross arms and accessories are installed; (5) the wire transverse insulating supporting rod is dismantled; (6) the wires are fixed; (7) the insulation shielding portion is dismantled. According to the insertion type erection method for the electrified pole, technical measures are adopted, for example, the wires are horizontally separated in a supported mode, the distance between every two adjacent wires is increased, other measures for improving the insulation shielding performance of the live wires are adopted, and a high-strength insulating lifting rope is adopted instead of a steel wire rope of a crane, safety performance erection of the pole is greatly improved, and the requirement for the environment on site and operation equipment is low.
Description
Technical field
The present invention relates to charged poling method.
Background technology
Charged poling method general at present has three kinds, and one is that two aerial lift device with insulated arm carry out simultaneously, and one is by lifting wire, a process carrying out various situation in vertical rod process.Another kind method is then that a car carries out, and it is identical with the two car operating types of the first, has been all vertical charged vertical bar, and different just lifting wires then processes with other Work tools, and the third method is plug-in type vertical rod.
Play vertical vertical rod and be similar to the vertical rod of gin pole formula, need cement pole to be positioned over wire, the same vertical plane in bar hole, a crane of reusing has been carried electric pole and has been entered hole.This mode needs two bucket arm vehicles to carry out, and a bucket arm vehicle is responsible for wire to prop up certain altitude, and bucket arm vehicle is responsible for the various operations in vertical rod process.Which advantage is, if whole vertical rod process arranges well, electric pole stands up in process, and crane, electric pole do not reach electrified body, and they ensure that charged safe main insulation is air insulation, and various shading tool is all supplementary insulation.Operation is comparatively safe, has higher coefficient of safety.But shortcoming is, this operating type needs good operation field, whole operation field must meet two bucket arm vehicles and the operable scope of crane, and vertical rod circuit is only confined to single loop circuit (double-circuit line wire cannot promote), institute's increase line line conductor point previously must estimate the load whether vertical load meets bucket arm vehicle and can bear.Which requires very high operating condition.
Plug-in type vertical rod is with equaling crane vertical rod, cement pole is placed away from live wire position, work the crane of reusing to have carried electric pole and carried to higher than live wire height, electric pole is inserted into hole from two wires or three wires gap, this mode only needs a bucket arm vehicle to carry out, and it act as various safety measure in vertical rod process and arranges and less important work.
Which advantage is, operation field demand fulfillment bucket arm vehicle and an operable scope of crane just can carry out pole operation, vertical rod circuit only need have enough gaps just can erect, not merely be confined to single back line, if circuit is horizontal double loop, three loops, four loops can operation, because wire need not promote, without the need to estimating wire vertical load, bucket arm vehicle is without the need to bearing top load risk.But shortcoming is to require that covering of live wire must be safe and reliable, crane lifting must be steadily, rock may touch the live wire covered greatlyr because electric pole rocks comparatively large or crane rope in vertical rod process, so, which ensures charged safe main insulation, and can be air insulation, also can be insulating tool, have uncertain factor, during operation, risk is relatively large.
To sum up two kinds of modes, reality live line working scene is difficult to suitable field condition for vertical charged vertical bar and carries out, that is play vertical vertical rod and carry out advantage comparatively greatly at the electric power enterprise that city circuit is more, carry out in rural line because field condition restriction cannot adopt the operation of vertical vertical rod mode substantially.Add that current most of cities circuit has started overhead transmission line and changed transformation with entering, city overhead transmission line is fewer and feweri, and charged vertical rod utilance is fewer and feweri as seen, so, play vertical pole operation mode and be not suitable for current live line working situation.And plug-in type vertical rod due to its field condition needed and line condition relatively low, progressively having started replacement erects formula vertical rod, but some shortcomings that he has need us to be improved and solve.
The maximum shortcoming of plug-in type vertical rod is exactly and insecure main insulation that plug-in type vertical rod advantage is that vertical rod utilizes the phase spacing gap had between wire and wire, and electric pole has been inserted vertical rod from this gap.Electric pole insert two wires alternate time, because phase spacing is less, the air gap had is also just less, thus air insulation distance relative deficiency.If produce electric pole to rock in crane lifting process, then very possible electric pole is touched the live wire covered and is caused operating risk.So employing which vertical rod main insulation is also unreliable.
Summary of the invention
Technical problem to be solved by this invention is just to provide the charged poling method of a kind of plug-in type, ensures the reliability of main insulation, improves the fail safe of the charged vertical rod of plug-in type.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the charged poling method of plug-in type, comprises the steps:
Step one, insulation is covered, and covers electric pole, wire, and cover to principle that is far away, that get on, get off by near when covering, each shading tool lap must not be less than 15cm;
Step 2, struts live wire with wire lateral isolation strut, and keep the spacing of more than 2.5m after strutting between two wires, the support mouth at wire lateral isolation strut two ends should clamp wire, ensures fixed;
Step 3, play pole erecting, crane uses the lifting of insulation steel wire rope, make electric pole and crane mediate state of insulation time electric potential relation can be transformed into: measure or air → electrified body are covered in earth potential → insulator → electric pole → insulation, ground electrician enters after hole, the position of electric pole and wire and angle are determined to carry out earthing at electric pole, every 30cm carries out tamping once, can throw off the insulation steel wire rope of crane after electric pole earthing 2/3;
Step 4, installs cross-arm and annex, first electric pole must be carried out shock test before installation cross-arm, and cross-arm and annex should arrange tight masked isolation measure of firmly insulating after installing;
Step 5, removes wire lateral isolation strut, during dismounting, should reduce wire and rock;
Step 6, wire is fixed, and should recover insulation measures immediately after conducting wire binding;
Step 7, removing insulation and covers, removing when covering because removing by from as far as near, first up and then down principle.
Preferably, described wire lateral isolation strut comprises shaft, and described shaft has screw, and shaft two ends are provided with strut head, and described strut head is flexible in shaft to be also fixed on different screws as required, and strut cephalic par is provided with U-shaped support mouth.
Preferably, described wire lateral isolation strut shaft diameter is 30mm, and the maximum shear stress that can bear is 1760N.
Preferably, described wire uses insulated target carry out coated and outside insulated target, be socketed with insulation pillar.
Preferably, cross-arm arranges the measure of insulation masked isolation, and the scope of covering is that the natural sag of wire adds 0.7m, and electric pole covers the buried depth+70cm that length should be pole-foundation bar hole.
The present invention, in order to insecure main insulation being become reliably, takes following several mode:
First, wire lateral isolation strut is used to strengthen wire phase spacing, the determination that wire is alternate is installed cross-arm by circuit and is determined, so carry out the prospecting before charged vertical rod this project such as should be reconnoitred one of requirement at every turn, if when cross-arm is shorter, wire insulation strut can be adopted, by alternate for wire people for strutting.Enough safe distances are had when guaranteeing that electric pole inserts.General wire lateral isolation stay length is 1 meter at present, strut rear basic energy and ensure enough safe distances, in order to improve fail safe further, wire lateral isolation strut can adopt stretching structure, make the spacing keeping more than 2.5m after strutting between two wires, the making material of wire lateral isolation strut is because the material of high insulation resistance and the insulating material of high mechanical properties.
Secondly, reinforced insulation covers.When electric pole insertion wire two is alternate, in crane operation process, probably make electric pole rock, if when rocking larger, safe distance may be shortened and cause safe distance not enough.If rock serious, electric pole may touch the electrified body covered, and now, insulation measure of covering bears main insulation completely.So, require that covering the insulation of live wire in operation process to be only one deck, because multilayer, reinforced insulation covers, as wire use insulated target carry out coated and be socketed with outside insulated target insulation pillar double-layer insulating structure, electric pole covers the buried depth+70cm that length should be pole-foundation bar hole, this is because when electric pole enters hole, electric pole is directly grounded, and this covers length and just makes up safety measure not enough in the process of hole.
Finally, live line working electric potential relation is changed.Charged vertical rod belongs to insulating gloves direct maintenance, and its electric potential relation is: earth potential → insulator → human body → insulator → electrified body is intermediate potential relation, and this relation is comparatively safe owing to being composite type protection.But according to the shortcoming that plug-in type vertical rod has, in vertical rod process, electric pole electric potential relation is in: measure or air (insulator) → electrified body are covered in earth potential (crane) → electric pole → insulation, possession electric potential relation, the comparatively single fail safe of this relation insulator is relatively poor.If change the steel wire cover of lifting into insulation steel wire rope, electric pole and the crane state of insulation electric potential relation now that mediates can be transformed into: measure or air (insulator) → electrified body (as figure below) are covered in earth potential (crane) → insulator (insulation steel wire rope) → electric pole → insulation, again arrive comparatively safe higher intermediate potential relation.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is the simple diagram that in plug-in type vertical rod process, wire struts;
Fig. 2 is wire insulation masking structure schematic diagram;
Fig. 3 is electric pole insulation masking structure schematic diagram;
Fig. 4 is crane schematic diagram when carrying out plug-in type vertical rod.
Embodiment
Below in conjunction with Fig. 1 to Fig. 4 the charged poling method of plug-in type made and illustrating.
As shown in Figure 1, for inserting the vertical rod space of electric pole 3 between circuit both sides electric pole and cross-arm 1, operating personnel operate in aerial lift device with insulated arm 7, use wire lateral isolation strut 2 that wire 4 level is strutted increase separation.
As shown in Figure 2, wire 4 uses insulated target carry out coated and outside insulated target, be socketed with insulation pillar 5.
As shown in Figure 3, electric pole covers the buried depth+70cm that length H should be pole-foundation bar hole.
As shown in Figure 4, crane 6 uses the lifting of insulation steel wire rope 60 need insert electric pole 3, and electric potential relation becomes at that time: measure or air → electrified body are covered in earth potential → insulator → electric pole → insulation.
The charged poling method of concrete plug-in type comprises the steps:
Step one, insulation is covered, and covers electric pole, wire, and cover to principle that is far away, that get on, get off by near when covering, each shading tool lap must not be less than 15cm;
Step 2, struts live wire with wire lateral isolation strut, and keep the spacing of more than 2.5m after strutting between two wires, the support mouth at wire lateral isolation strut two ends should clamp wire, ensures fixed;
Step 3, play pole erecting, crane uses the lifting of insulation steel wire rope, make electric pole and crane mediate state of insulation time electric potential relation can be transformed into: measure or air → electrified body are covered in earth potential → insulator → electric pole → insulation, ground electrician enters after hole, the position of electric pole and wire and angle are determined to carry out earthing at electric pole, every 30cm carries out tamping once, can throw off the insulation steel wire rope of crane after electric pole earthing 2/3;
Step 4, installs cross-arm and annex, first electric pole must be carried out shock test before installation cross-arm, and cross-arm and annex should arrange tight masked isolation measure of firmly insulating after installing;
Step 5, removes wire lateral isolation strut, during dismounting, should reduce wire and rock;
Step 6, wire is fixed, and should recover insulation measures immediately after conducting wire binding;
Step 7, removing insulation and covers, removing when covering because removing by from as far as near, first up and then down principle.
Described wire lateral isolation strut comprises shaft, and described shaft has screw, and shaft two ends are provided with strut head, and described strut head is flexible in shaft to be also fixed on different screws as required, and strut cephalic par is provided with U-shaped support mouth.Described wire lateral isolation strut shaft diameter is 30mm, and the maximum shear stress that can bear is 1760N.Cross-arm arranges the measure of insulation masked isolation, and the scope of covering is that the natural sag of wire adds 0.7m.
The present invention utilize wire lateral isolation strut wire level to be strutted to increase separation and other improve live wire insulation and cover measure and with after technical measures such as high-strength insulating lifting rope replacement crane rope etc., its fail safe is greatly improved, through practice test, this method is feasible, due to lower to the requirement of site environment and working equipment.
Claims (1)
1. the charged poling method of plug-in type, is characterized in that comprising the steps:
Step one, insulation is covered, and covers electric pole, wire, and cover to principle that is far away, that get on, get off by near when covering, each shading tool lap must not be less than 15cm;
Step 2, struts live wire with wire lateral isolation strut, and keep the spacing of more than 2.5m after strutting between two wires, the support mouth at wire lateral isolation strut two ends should clamp wire, ensures fixed;
Step 3, play pole erecting, crane uses the lifting of insulation steel wire rope, make electric pole and crane mediate state of insulation time electric potential relation can be transformed into: measure or air → electrified body are covered in earth potential → insulator → electric pole → insulation, ground electrician enters after hole, the position of electric pole and wire and angle are determined to carry out earthing at electric pole, every 30cm carries out tamping once, can throw off the insulation steel wire rope of crane after electric pole earthing 2/3;
Step 4, installs cross-arm and annex, first electric pole must be carried out shock test before installation cross-arm, and cross-arm and annex should arrange tight masked isolation measure of firmly insulating after installing;
Step 5, removes wire lateral isolation strut, during dismounting, should reduce wire and rock;
Step 6, wire is fixed, and should recover insulation measures immediately after conducting wire binding;
Step 7, removing insulation and covers, removing when covering because removing by from as far as near, first up and then down principle;
Described wire lateral isolation strut comprises shaft, described shaft has screw, shaft two ends are provided with strut head, described strut head is flexible in shaft to be also fixed on different screws as required, strut cephalic par is provided with U-shaped support mouth, described wire lateral isolation strut shaft diameter is 30mm, the maximum shear stress that can bear is 1760N, described wire uses insulated target carry out coated and outside insulated target, be socketed with insulation pillar, cross-arm arranges the measure of insulation masked isolation, the scope of covering is that the natural sag of wire adds 0.7m, electric pole covers the buried depth+70cm that length should be pole-foundation bar hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310682455.1A CN103806740B (en) | 2013-12-12 | 2013-12-12 | Insertion type erection method for electrified pole |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310682455.1A CN103806740B (en) | 2013-12-12 | 2013-12-12 | Insertion type erection method for electrified pole |
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| CN103806740A CN103806740A (en) | 2014-05-21 |
| CN103806740B true CN103806740B (en) | 2015-01-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106437280A (en) * | 2016-11-14 | 2017-02-22 | 国网湖北省电力公司咸宁供电公司 | Live pole erecting method for 10 kV common-tower double-circuit and vertically arranged power distribution line |
| CN109462181B (en) * | 2018-10-09 | 2020-03-24 | 国网浙江省电力有限公司衢州供电公司 | Rotary type overhead conductor strutting device |
| CN116260073B (en) * | 2023-05-16 | 2023-08-04 | 山西晋缘电力化学清洗中心有限公司 | Operation method for live replacement of 35kV linear insulator string |
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