CN103227431B - 220kV long span super high town suspension insulator charged for replacement method - Google Patents
220kV long span super high town suspension insulator charged for replacement method Download PDFInfo
- Publication number
- CN103227431B CN103227431B CN201310086976.0A CN201310086976A CN103227431B CN 103227431 B CN103227431 B CN 103227431B CN 201310086976 A CN201310086976 A CN 201310086976A CN 103227431 B CN103227431 B CN 103227431B
- Authority
- CN
- China
- Prior art keywords
- wire
- insulator string
- equipotential electrician
- jig
- yoke plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012212 insulator Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000725 suspension Substances 0.000 title claims abstract description 22
- 230000005684 electric field Effects 0.000 claims abstract description 24
- 238000009413 insulation Methods 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000005570 vertical transmission Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 239000012211 strain insulator Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Landscapes
- Electric Cable Installation (AREA)
Abstract
The present invention relates to a kind of power tool of hot-line insulator string replacement, particularly 220kV long span super high town suspension insulator charged for replacement method, its main points are: overcome technology prejudice, arcing horn on the cross-arm of 220kV long span super high town on the interim yoke plate removing connecting insulator string and grading ring, to vacate the screw that can connect jig on yoke plate; Adopt mode that upper and lower double card tool and yoke plate carry out being connected to promote insulator string, the half that stressed need of kit are original, realize the carrying to large load insulator string and operation; Adopt ski-lift carrying equipotential electrician to pass in and out electric field by cross-arm, fail safe and controllability religion strong, operational method is simple, power tool can directly adopt existing instrument, time saving and energy saving and economical, and steel pipe pole high tower hot-line insulator string replacement is become a reality.
Description
Technical field
The present invention relates to a kind of power tool of hot-line insulator string replacement, particularly 220kV long span super high town suspension insulator charged for replacement method.
Background technology
Along with technical development, on ultra-high-tension power transmission line, on the high tower of particularly some long-span electric transmission line, the equipment adopted is all the implement of large load, because high tower Type of equipment is special, load large, is difficult to adopt routine work instrument to change.
The long span super high town design of such as 220kV high standing grain I, II road adopts steel pipe pole, in the leap mode of strain insulator-straight line-straight line-straight line-straight line-strain insulator, large crossing span distance is 795m, 1279m, 1237m, 1278m, 460m, maximum perpendicular span is 2157m, tower overall height is respectively 118m, 145m, 181m, 162m, and engineering wire adopts two division extra-heavy shaped steel core aluminium alloy wire (in anticorrosion), sectional area S=729.0mm2, outside diameter d=35.1mm, calculated mass G=3297 ㎏/㎞; The every phase suspension string of high tower adopts the two string composition of 22 FC400/205, and monolithic glass insulator structure height is 205mm, and insulator string is long is 4510mm, insulator string assembled height 5685mm, and insulator string gross mass is 308 ㎏.Equipment due to these large loads is the several times of common line, and common live line working wire grip is stressed too large, and operating difficulties, cannot carry out valid function to this equipment, considerably increase the labour intensity of operating personnel, and operating efficiency be extremely low; And due to high tower height high, its tower formed needs to consider the factor such as environment, wind lotus, therefore cross-arm complex structure, the particularly installation of insulator string, the every phase suspension insulator of high tower is all provided with one group of arcing horn and one group of grading ring, effective space cannot be found for installation exercise instrument, and therefore this long span super high town suspension insulator there is no method and carries out live line working.
Summary of the invention
The object of the invention is to provide according to the deficiencies in the prior art part a kind of easy to operate, 220kV long span super high town suspension insulator charged for replacement method of reducing labour intensity, increasing work efficiency.
The object of the invention is to be realized by following approach:
220kV long span super high town suspension insulator charged for replacement method, its main points are, comprise the steps:
A set of hot-line insulator string replacement power tool is provided, this instrument includes jig, lower jig, wire grip and insulated tension pole, the upper end of wire grip is connected with insulated tension pole, upper jig and lower jig are a kind of bent plate jig, include left card and right card, left card is a kind of opening fork-shaped, and fork pockets thickness is greater than the yoke plate thickness that insulator string to be replaced connects, and left card laterally runs through has two bolts can inserting screw wherein; The right card of lower jig is connected with the bottom of wire grip, and the right card of upper jig is connected with the end of insulated tension pole;
There is provided a set of tackle pulley, lifting rope, pull rope, connection cord and insulation chair lift, tackle pulley includes top sheave group and lower sheave, and two pulleys that top sheave group is located along the same line by two centers of circle form; One end of lifting rope is fixedly connected with the pulley being positioned at top in top sheave group;
There is provided plural name high tower operating personnel and an equipotential electrician, described personnel carry above-mentioned hot-line insulator string replacement power tool, tackle pulley, lifting rope, pull rope, connection cord and insulation chair lift and all enter on the cross-arm that insulator string to be replaced connects;
High tower operating personnel is by the pull bar of the other end lashing of lifting rope above operation cross-arm, pull rope one end is fixed on lower sheave, the other end along same around to the pulley sequentially walking around in top sheave group the pulley, lower sheave and the top sheave group that are arranged in below and be positioned at top, and last by the hand-held manipulation of high tower operating personnel; In addition, then by the two ends of connection cord be fixedly connected with the pulley and chair lift that are positioned at below in top sheave group respectively;
High tower operating personnel removes grading ring on cross-arm side yoke plate that insulator string connects and arcing horn on cross-arm, make this cross-arm side yoke plate vacates an installing hole, by the left card of jig upper in hot-line insulator string replacement power tool to declivity inserting on this cross-arm side yoke plate, and by corresponding with installing hole for one of them screw, another screw is positioned at the lower surface of cross-arm side yoke plate, then runs through on two screws and installs set bolt;
After equipotential electrician carries out safety measure, be sitting in chair lift, high tower operating personnel controls pull rope well, under the cooperation of tackle pulley, slowly transfers equipotential electrician to side of wire;
Equipotential electrician, when arriving side of wire, catches rapidly wire to enter electric field, and is straddled on two root wires by transfer in chair lift, and accomplish fluently safety belt, and move to insulator string side, chair lift is pulled away from side of wire by high tower operating personnel;
A kind of insulation is provided to transmit rope, one end of insulation transmission rope is transferred and is passed to equipotential electrician by high tower operating personnel, insulation is transmitted rope and is tied up on the grading ring of side of wire yoke plate by equipotential electrician, and remove grading ring bolt, grading ring is disassembled from side of wire yoke plate, and be delivered to cross-arm by insulation transmission rope under the cooperation of high tower operating personnel; Now side of wire yoke plate is vacated two installing holes;
Lower jig in hot-line insulator string replacement power tool is transmitted rope by insulation and sends equipotential electrician to by high tower operating personnel, the upward cover of left card of lower jig is inserted on side of wire yoke plate by equipotential electrician, and two installing holes screw of two on left card aimed on side of wire yoke plate, then inserting bolt is fastenedly connected;
Wire grip in hot-line insulator string replacement power tool is connected with insulated tension pole by high tower operating personnel, and send one end of wire grip to equipotential electrician by insulation transmission rope, now high tower operating personnel and equipotential electrician coordinate, by high tower operating personnel, insulated tension pole is connected to the right card of upper jig, equipotential electrician is then by wire grip and lower jig connection;
It is stressed to hot-line insulator string replacement power tool that equipotential electrician operates wire grip, then it is lax to insulator string to operate lifting lead wire further; Check, change insulator string,
Equipotential electrician again operates wire grip until insulator string recovers stress, then oppositely removes wire grip and lower jig, and installs grading ring; High tower operating personnel removes insulated tension pole and upper jig, then grading ring is transmitted rope by insulation and sends equipotential electrician to, finally again chair lift is passed to equipotential electrician, operation pull rope, moves cross-arm place to by carrying the chair lift of holding equipotential electrician.
The main points one of the method for the invention are: the arcing horn on the cross-arm of 220kV long span super high town on the interim yoke plate removing connecting insulator string and grading ring, to vacate the screw that can connect jig on yoke plate.This is a kind of off the beaten track method, in conventional hot-line insulator string replacement operation, the way of those skilled in the art is that the yoke plate that is connected on cross-arm or with insulator string is found can the place of installation exercise instrument, because the installation of any gold utensil and structure all perform according to electric operating standard, therefore those skilled in the art define technology prejudice under " industry standard " this inertial thinking, namely the structure changing fitting can not be expected, the overhead line structures that particularly electric pressure is higher, its safety standard is higher, and those skilled in the art overcome this technology prejudice, have modified the part structure of gold utensil in safe range temporarily, for hot-line insulator string replacement provides installing space.
Two of main points of the present invention are, adopt mode that upper and lower double card tool and yoke plate carry out being connected to promote insulator string, can become like this and promote whole shelves wire into promoting the power suffered by the yoke plate of side, the half that stressed need of such kit are original, realizes the carrying to large load insulator string and operation.During operation, respectively the left cutting ferrule of upper jig and lower jig is inserted on the yoke plate at connecting insulator string two ends, screw now on yoke plate is communicates corresponding with the screw on bent plate jig, and is fastenedly connected by bolt, the firm clamping of jig, lower jig and yoke plate in realization.
Three of main points of the present invention are, adopt ski-lift carrying equipotential electrician to pass in and out electric field by cross-arm.Because the complex structure at cross-arm place, the steel pipe pole covering sight line, gold utensil etc. are more, and position is little, insulator string for large load carries out operating and need to teach many operating personnels to coordinate together, therefore through in many ways investigating, after computation and analysis, the present invention adopts and configures an equipotential electrician at side of wire, but in steel pipe pole high tower, because operating position is high, therefore need to adopt the reliable and effective method entering electric field especially.Carry equipotential electrician from cross-arm by chair lift mode to enter electric field and solve the problems referred to above, first, shorter to side of wire operating distance from cross-arm, fail safe and controllability religion are by force, next is unsettled and vertically enters electric field, can have more selectable home, and last operational method is simple, power tool can directly adopt existing instrument, time saving and energy saving and economical, steel pipe pole high tower hot-line insulator string replacement is become a reality.
The present invention can be specially further:
The person of high tower operating personnel and equipotential electrician and the safe distance of entrained nonisulated instrument and electrified body are greater than 1.8 meters; The combinational gap that equipotential electrician passes in and out electric field is greater than 2.1 meters.
Equipotential electrician is the operating personnel entering electric field, and therefore its security needs have enough guarantees, comprises the standby security personnel rope of a complete set of screening clothing and firm connection.
The position that equipotential electrician arrives side of wire to flush with wire with its waist and is as the criterion.
The safety of operating personnel is guaranteed in described position first, be secondly with can effectively, reliably operating distance be as the criterion.In the process of test of many times, flush with wire the benchmark arriving side of wire as it using the waist of equipotential electrician and can realize best technique effect.
When equipotential electrician transmit or receive grading ring time, grading ring colligation with the state of horizontal traverse away from insulator string transmission.
Because the transmission of grading ring is transmitted in the electric field, consider the characteristic of grading ring, prevent it from moving in the electric field and making it there is unsafe factor, the horizontal traverse of needs transmits, and forbids vertical transmission.
Hot-line insulator string replacement power tool of the present invention can also be specially further:
The right card of upper jig and lower jig is a kind of solid component, and itself and wire grip or insulated tension pole intersect and tight joint;
Or: right card is also in a kind of opening fork-shaped, and fork pockets thickness is greater than the thickness of wire grip feed screw nut or insulated tension pole, the fork wing laterally runs through and has a kind of connecting pin can be plugged on hole wherein;
Or: right card is also in a kind of opening fork-shaped, and fork pockets thickness is greater than the thickness of wire grip feed screw nut, on the fork wing end face laterally run through the connecting pin having a kind of wire grip feed screw nut two ends can twisted branch groove wherein.
Realize right card by connecting pin to be connected with wire grip feed screw nut or insulated tension pole twisted branch, thus can ensure that wire grip can swing by relative bent plate card with insulated tension pole, make operation process convenient.
Mutual alignment structural relation between left card and right card can be specially:
The relatively right card of left card tilts, and the junction of the two is near left card fork pockets root place, and jig entirety becomes a kind of bent.
Because the both sides of yoke plate are inclined-plane, therefore, the also formation corresponding to the left card shape of yoke plate clamping tilts to extend shape, so not only light and handy but also easy to use.
Also because the both sides of yoke plate are inclined-plane, the inclined-plane tilted in a kind of relative fork pockets depth direction that the groove bottom of the left card fork pockets directly touched to this inclined-plane is like this also corresponding.
Left card fork pockets bottom land inclined-plane and right card length direction form included angle A, the included angle B complementary angle each other that this included angle A yoke plate bottom surface relative to inclined-plane, yoke plate both sides is formed.
Like this, the length direction of right card can be made substantially vertical with the length direction of wire grip.
Wire grip of the present invention can be the conventional wire grip used, and can also be structure new as follows:
Wire grip includes outer loop bar, nut sleeve, screw rod, operating grip, adjustment means, fixed mount and gear train; Outer loop bar comprises upper boom and lower beam, and nut sleeve is positioned at the inner chamber of outer loop bar, through whole outer loop bar, and screw rod is arranged in nut sleeve inner chamber, and two ends expose to outside nut sleeve, and is respectively arranged with the first connecting portion and the second connecting portion; Adjustment means includes the cross bar that is connected with operating grip and is positioned at the connecting rod of crossbar end perpendicular to cross bar, connecting rod and the T-shaped structure of cross bar, connecting rod is a kind of ratchet mechanism, and corresponding crossbar end is a kind of detent mechanism, and the two connects to form click component; The two ends of connecting rod are respectively fixedly connected with lower beam with upper boom respectively by one group of fixed mount; Gear train includes intermeshing driving wheel and driven pulley, and wherein driving wheel is diameter comparatively pinion, and driven pulley is larger diameter gear, driving wheel is arranged on the side of connecting rod, between cross bar and fixed mount, driven pulley, between upper boom and lower beam, is fixedly connected with nut sleeve.
During use, rotate adjustment means by operating grip, and drive the driving wheel be positioned on connecting rod to rotate, driving wheel drives driven pulley to rotate further, driven pulley drives nut sleeve to rotate, thus the screw rod being positioned at nut sleeve inner chamber is moved up and down, and operates to coordinate other insulating tools; Wherein said click component can make adjustment means drive connecting rod to be one-directional rotation.Because wire grip of the present invention is for promoting or length between change equipment and distance, especially outer loop bar is separated, nut sleeve is exposed to install gear wheel in centre, then pinion is adopted to drive the mode of gear wheel, the speed ratio of adjustment gear wheel and pinion can save operation firmly greatly, make operation more convenient, laborsaving, greatly reduce the labour intensity of operating personnel, improve operating efficiency.
The position that the upper boom of nut sleeve loop bar is outside relative with lower rod end surface is provided with spacing preiection.
Like this, this spacing preiection for limiting upper boom and the relative position of lower beam in nut sleeve, meanwhile, for driven pulley provides enough and reliable safe space.
Screw rod comprises screw rod and lower screw rod, upper screw rod is positioned at a side of nut sleeve inner chamber, the one end exposing to nut sleeve connects the first connecting portion, lower screw rod is positioned at another side of nut sleeve inner chamber, the other end exposing to nut sleeve connects the second connecting portion, and upper screw rod is rightabout screw thread with the internal thread of the nut sleeve that the corresponding spiral of lower screw rod connects.
Like this, about two counterscrew be screwed with nut sleeve can under the drive of nut sleeve, simultaneously to outside two of nut sleeve or medial movement, thus produce the flexible change of axis, the power tightened up or loosen can be provided when replacing insulator under electrified, be convenient to the insulator string promoting large load.Screw rod is divided into two sections, singe screw compared to existing technology, can when nut sleeve provides same rotating distance, obtain the stroke of double screw rod, thus obtain double stroke distances, like this, under the prerequisite needing same stroke distances, only need the stroke operating rotating nut cover half, make further to operate more laborsaving convenience.
Further, the one end being positioned at nut sleeve inner chamber at upper screw rod and lower screw rod is provided with retaining pin, corresponding is provided with spacing hole slot inside the both ends of nut sleeve, spacing hole slot and retaining pin suitable.
Because screw rod is divided into two, therefore its total travel is also shorter, for preventing screw rod from use deviating from nut sleeve, preferably installs retaining pin, and the processing safety of instrument is protected.
The present invention can also be specially further:
In adjustment means, be provided with a cuphead pilotage in cross bar, the ratchet in detent mechanism is withstood in this cuphead pilotage one end, and the other end is connected to by a spring and the hold-down screw that is connected with spring the end that cross bar is connected with operating grip.
Cuphead pilotage is used for ratchet to engage with ratchet reliably, ensures the reliability of operation.
In sum, the invention provides a kind of 220kV long span super high town suspension insulator charged with the method for changing, its main points are: overcome technology prejudice, arcing horn on the cross-arm of 220kV long span super high town on the interim yoke plate removing connecting insulator string and grading ring, to vacate the screw that can connect jig on yoke plate; Adopt mode that upper and lower double card tool and yoke plate carry out being connected to promote insulator string, the half that stressed need of kit are original, realize the carrying to large load insulator string and operation; Adopt ski-lift carrying equipotential electrician to pass in and out electric field by cross-arm, fail safe and controllability religion strong, operational method is simple, power tool can directly adopt existing instrument, time saving and energy saving and economical, and steel pipe pole high tower hot-line insulator string replacement is become a reality.
Accompanying drawing explanation
Figure 1 shows that the charged structural representation with changing device of long span super high town suspension insulator of the present invention;
Figure 2 shows that the structural representation of upper jig/lower jig in live replacing device of the present invention;
Figure 3 shows that the plan structure figure of Fig. 2;
Figure 4 shows that the structural representation of wire grip in invention live replacing device;
Figure 5 shows that the structural representation passing in and out electric field set of tools described in the specific embodiment of the invention.
Below in conjunction with embodiment, the present invention is described further.
Embodiment
Most preferred embodiment:
First required various instruments are specifically introduced:
Hot-line insulator string replacement power tool: with reference to accompanying drawing 1, include jig 1, lower jig 2, wire grip 3 and insulated tension pole 4, wire grip 3 bottom is connected with insulated tension pole 4.
With reference to accompanying drawing 2 and accompanying drawing 3, and by reference to the accompanying drawings 1, upper jig 1 and lower jig 2 are a kind of bent plate jig, include left card 5 and right card 6, left card 5 is in a kind of opening fork-shaped, and fork pockets 7 thickness is greater than the yoke plate thickness that insulator string to be replaced connects, and the relatively right card 6 of left card 5 tilts, and the junction of the two is near left card 5 fork pockets 7 root place, jig entirety becomes a kind of bent.Left card 5 laterally runs through and has two screws 8 that bolt sleeve can be inserted in wherein; Two screws 8 are respectively at the end position of the bending place of jig and left card.Consider that the yoke plate that insulator string is upper and lower connected is different, two screw spacing on the left card of upper jig 1 are greater than two screw spacing on the left card of lower jig; Because the screw left card of upper jig 1 being positioned at bending place is corresponding with the handle hole on yoke plate, bolt after overlapping, is adopted to be fastenedly connected; The screw being positioned at left card end is then positioned at the side, lower surface of yoke plate, forms a shearing strong point by bolt or latch through this screw, is connected with solid and reliable between yoke plate to realize upper jig.Upper two screws of left card of lower jig 2 are then all corresponding with the screw on the yoke plate be positioned at below insulator string, and are all fastenedly connected by bolt.
Because the both sides of yoke plate are inclined-plane, the inclined-plane tilted in a kind of relative fork pockets depth direction that the groove bottom of left card 5 fork pockets 7 directly touched to this inclined-plane is like this also corresponding.Left card fork pockets 7 bottom land inclined-plane and right card length direction form included angle A, the included angle B complementary angle each other that this included angle A yoke plate bottom surface relative to inclined-plane, yoke plate both sides is formed.
The right card of upper jig 1 is connected with the upper end of wire grip 3, and the right card of lower jig 2 is connected with the bottom of insulated tension pole 4.Be specially: right card 6 is a kind of solid component, its end is provided with connecting hole 9, for realizing being fastenedly connected by fastening bolt with wire grip or insulated tension pole.
With reference to accompanying drawing 4, the wire grip in above-mentioned live replacing device, includes outer loop bar, nut sleeve 10, screw rod, operating grip 11, adjustment means, fixed mount and gear train; Outer loop bar comprises upper boom 12 and lower beam 13, nut sleeve 10 is positioned at the inner chamber of outer loop bar, through whole outer loop bar (comprising upper boom 12 and lower beam 13), upper boom 12 and lower beam 13 are separately, lay respectively at the right and left of nut sleeve 10, the position that the upper boom 12 of nut sleeve 10 loop bar is outside relative with lower beam 13 end face is provided with spacing preiection 24.
Screw rod is arranged in nut sleeve 10 inner chamber, comprise the inner chamber that screw rod 15 under screw rod 14 and lower screw rod 15(is arranged in lower beam 13, not shown in FIG.), upper screw rod 14 is positioned at the limit, left side of nut sleeve 10 inner chamber, and the end exposing to nut sleeve 10 is connected with the first connecting portion 16; Lower screw rod 6 is positioned at the right edge of nut sleeve 10 inner chamber, the end exposing to nut sleeve 10 is connected with the second connecting portion 17, upper screw rod 14 is rightabout screw thread with the internal thread of the nut sleeve that the corresponding spiral of lower screw rod 15 connects, the internal thread of its place nut sleeve of the threaded adapter on two screw rods is also rightabout screw thread each other.Simultaneously on one end that upper screw rod 14 and lower screw rod 15 are positioned at nut sleeve 10 inner chamber, be provided with retaining pin 25, corresponding is provided with spacing hole slot inside the both ends of nut sleeve 10, spacing hole slot and retaining pin 25 suitable.
Adjustment means includes the cross bar 18 that is connected with operating grip 11 and is positioned at connecting rod 19, connecting rod 19 and the T-shaped structure of cross bar 18 of cross bar 18 end perpendicular to cross bar 18.Described fixed mount is two groups, often organize the small slide 20 and ratchet bearing 21 that all there are Construction integration, connecting rod 19 is a kind of ratchet mechanism, centre is ratchet, two ends are ratchet shaft and are connected respectively on the ratchet bearing 21 of one group of fixed mount, and then are fixedly connected with lower beam 13 with upper boom 12 respectively by the small slide of corresponding group fixed mount.
One end of corresponding cross bar 18 is a kind of detent mechanism, include ratchet 22 and cuphead pilotage 23, the ratchet 22 in detent mechanism is withstood in cuphead pilotage 23 one end, and the other end is connected to by a spring 26 and the hold-down screw 27 that is connected with spring 26 end that cross bar 18 is connected with manual manipulation handle 11.Ratchet on connecting rod 19 and the ratchet on cross bar 22 are connected with a joggle and form click component.
Gear train includes intermeshing driving wheel 28 and driven pulley 29, wherein driving wheel 28 is diameter comparatively pinion, driven pulley 29 is larger diameter gear, driving wheel 28 is arranged on the side of connecting rod 19, be positioned between cross bar 18 and fixed mount (and lower beam be fixedly connected with small slide), driven pulley 29, between upper boom and lower beam, is fixedly connected with nut sleeve 10.
First connecting portion 16 and the right card end portions cross of upper jig 1 of wire grip, make the connecting hole correspondence of the two through, re-use the securing members such as bolt and connect.Second connecting portion 17 of same wire grip also adopts bolt to be fixed with the upper end of insulated tension pole to be connected.
Turnover electric field set of tools, with reference to accompanying drawing 5, comprise coaster, lifting rope, pull rope 30, connection cord and insulation chair lift 31, tackle pulley includes top sheave group 32 and lower sheave 33, and two pulleys that top sheave group 32 is located along the same line by two centers of circle form; One end of lifting rope is fixedly connected with the pulley being positioned at top in top sheave group; By on the pull bar of the other end lashing of lifting rope above operation cross-arm; Pull rope 30 one end is fixed on lower sheave 33, the other end along same around to the pulley sequentially walking around in top sheave group the pulley, lower sheave and the top sheave group that are arranged in below and be positioned at top, and last by the hand-held manipulation of high tower operating personnel; In addition, insulation chair lift 31 is a kind of scholar's font hanging ladder, and its upper end has connecting portion, is fastenedly connected, also can be fixedly connected with lower sheave and scholar's font hanging ladder respectively by the two ends of connection cord by the lower end connecting hole of bolt by itself and lower sheave 33.
Concrete, as follows to 220kV high standing grain I, II road long span super high town out tape charged renewal suspension insulator operational method:
Personnel arrangement:
Work director 1 people, specific responsibility guardian 1 people, electrician (high tower operating personnel) 5 people on tower, equipotential electrician 1 people.
Main tool:
Hot-line insulator string replacement power tool 1 overlaps; Screening clothing 1 overlaps; Insulation chair lift 1 pair, insulated operating rod 2, walk 1 to walk that 2 tackle pulley 1 are overlapped, 1, rope is ensured public security in insulation ropes 2 (rope and pull rope are transmitted in insulation), insulation rope sling 4 (lifting rope, connection cord), insulation 3, coaster, standby.
Operational method:
1, operation is 220kV high standing grain I road #11 tower C phase mutually.The approach that equipotential electrician passes in and out electric field is: be responsible for tow out one by electrician on tower and walk two tackle pulley and pass in and out electric field up and down in the vertical direction.
2, on tower, electrician removes grading ring, the arcing horn on C phase cross-arm side yoke plate, is arranged on yoke plate by upper jig.
3, on tower, electrician accomplishes fluently chair lift hanging point rope sling above the cross-arm platform of C phase small size side, and hangs up properly away that one walks two tackle pulley and chair lift, rope is transmitted in insulation, standby security personnel rope.
4, tower powers on industry control chair lift, and height that equipotential personnel take (because the position that high tower is stood for operating personnel is narrow, therefore operating personnel should work good, and can not block the sight line between stay cord people and equipotential people) should be convenient in chair lift position.
5, equipotential electrician wears a complete set of qualified shielding, and each several part connects reliable, equipotential electrician has checked tackle pulley, standby security personnel rope etc., carry out suitable load to impact, under the license of work director, chair lift (now, be responsible for pull rope and rope should be kept a firm hand on electrician on the tower of security personnel's rope) is taken after without exception.
6, isopotential electrical work area should adjust sitting posture after chair, be advisable with comfortable, work director and the cooperation personnel each connecting portion of checking tool again, equipotential electrician slowly transfers to side of wire by the personnel being responsible for extension pulley group after without exception under the agreement of work director.
7, equipotential electrician is when arriving side of wire (maintaining an equal level with the waist of equipotential electrician and wire), and under the license of work director, left hand catches rapidly wire to enter electric field.
8, equipotential electrician is shifted by chair lift and straddles on two root wires, and on tower, chair lift is departed from wire by electrician.
9, equipotential electrician accomplishes fluently safety belt on wire.Equipotential electrician moves near insulator string, and can remove grading ring, erecting tools is advisable (isopotential electrical foreman portion can not surmount second insulator).
10, on tower, transmission rope is passed to equipotential electrician by electrician, and insulation is transmitted rope and tied up on grading ring by equipotential electrician.
11, equipotential electrician removes grading ring bolt, is disassembled by grading ring from right-angled intersection yoke plate, on tower electrician cooperation under grading ring is passed to cross-arm place.
12, on tower, lower jig is passed to equipotential electrician by electrician, and lower jig is arranged on yoke plate by equipotential electrician.
13, wire grip and insulated tension pole be connected with two kinds, one be as shown in Figure 1 wire grip upper, jig in connection, and insulated tension pole under, connect lower jig, the operation of such wire grip is just completed by the high tower operating personnel be positioned near upper jig position.Another kind is then that insulated tension pole is upper, jig in connection, and wire grip under, connect lower jig, the operation of such wire grip is just completed by the equipotential electrician be positioned near lower jig position, be specially: on tower, electrician transmits after rope ties insulated tension pole (assembling with leading screw) with insulation and insulating bar (one end with leading screw) is passed to equipotential electrician, on tower, electrician and equipotential electrician work in coordination, in advance insulating bar is connected to upper jig by electrician on tower, after by equipotential electrician by leading screw and lower jig connection.
14, equipotential electrician tightens up wire grip and suspends to instrument stress, electrician and each junction of equipotential electrician checking tool on tower, continues operation wire grip lifting lead wire relax to insulator string after without exception by equipotential electrician.
15, electrician and the equipotential electrician each junction of checking tool again on tower, rear equipotential electrician without exception takes out socket-clevis eye bolt, throws off the connection of insulator and socket-clevis eye.
16, insulator and socket-clevis eye reconnect by equipotential electrician, and operation wire grip recovers insulator running status.
17, on tower, electrician and equipotential electrician work in coordination removal tool.
18, on tower, electrician and equipotential electrician work in coordination and install grading ring, arcing horn resumes operation state.
19, on tower, chair lift is passed to equipotential electrician by electrician.Equipotential electrician is transferred to chair lift by wire, check good each link and standby security personnel rope, the safety belt on wire is untied after without exception, electric field (now tower is responsible for the electrician of tricing line and should controls rope well, prevent equipotential electrician from again entering electric field) is exited under the license of work director.
14, on tower, equipotential electrician is slowly promoted to cross-arm place by electrician.
15, removal tool, end-of-job.
Safety notice:
1, this subjob must establish special messenger to guard.
2, the safe distance of operating personnel's person and entrained nonisulated instrument and electrified body is forbidden to be less than 1.8 meters.
3, effective insulated lengths of insulation ropes and insulating bar should be forbidden to be less than 1.8 meters and 2.1 meters respectively.
4, the combinational gap that equipotential electrician passes in and out electric field is forbidden to be less than 2.1 meters.
5, equipotential electrician should wear a complete set of qualified shielding, and each several part connects reliable.
6, should check before equipotential electrician passes in and out electric field drafting tool, standby security personnel rope connect firm.
7, during work high above the ground, instrument, article should be placed firmly.
8, on tower, operating personnel should accept the commander of work director, and energy is concentrated, and notes the sight line of not blocking impact operation.
9, equipotential electrician should maintain an equal level suitable with waist and wire at arrival side of wire, and informs personnel on tower by clear for information during in-position in time, and tower personnel should note the information listening to equipotential electrician reflection.
10, electrician when equipotential electrician exits electric field, tower being responsible for tricing line should control rope well, prevents equipotential electrician from again entering electric field.
11, grading ring colligation with the state transfer of horizontal traverse, and away from insulator string, should should forbid vertical transmission.
12, should with insulating cord colligation when insulated tension pole transmits.
13, leading screw, lower jig pass to isopotential electrical and should contact with equipotential electrician after first contact wire man-hour.
14, allly bring that object on tower all needs fixation, tool materials transmission all needs colligation firm.
It is same as the prior art that the present invention does not state part.
Claims (10)
1.220kV long span super high town suspension insulator charged for replacement method, is characterized in that, comprise the steps:
A set of hot-line insulator string replacement power tool is provided, this instrument includes jig, lower jig, wire grip and insulated tension pole, the upper end of wire grip is connected with insulated tension pole, upper jig and lower jig are a kind of bent plate jig, include left card and right card, left card is a kind of opening fork-shaped, and fork pockets thickness is greater than the yoke plate thickness that insulator string to be replaced connects, and left card laterally runs through has two bolts can inserting screw wherein; The right card of lower jig is connected with the bottom of wire grip, and the right card of upper jig is connected with the end of insulated tension pole;
There is provided a set of tackle pulley, lifting rope, pull rope, connection cord and insulation chair lift, tackle pulley includes top sheave group and lower sheave, and two pulleys that top sheave group is located along the same line by two centers of circle form; One end of lifting rope is fixedly connected with the pulley being positioned at top in top sheave group;
There is provided plural name high tower operating personnel and an equipotential electrician, described personnel carry above-mentioned hot-line insulator string replacement power tool, tackle pulley, lifting rope, pull rope, connection cord and insulation chair lift and all enter on the cross-arm that insulator string to be replaced connects;
High tower operating personnel is by the pull bar of the other end lashing of lifting rope above operation cross-arm, pull rope one end is fixed on lower sheave, the other end along same around to the pulley sequentially walking around in top sheave group the pulley, lower sheave and the top sheave group that are arranged in below and be positioned at top, and last by the hand-held manipulation of high tower operating personnel; In addition, then by the two ends of connection cord be fixedly connected with the pulley and chair lift that are positioned at below in top sheave group respectively;
High tower operating personnel removes grading ring on cross-arm side yoke plate that insulator string connects and arcing horn on cross-arm, make this cross-arm side yoke plate vacates an installing hole, by the left card of jig upper in hot-line insulator string replacement power tool to declivity inserting on this cross-arm side yoke plate, and by corresponding with installing hole for one of them screw, another screw is positioned at the lower surface of cross-arm side yoke plate, then runs through on two screws and installs set bolt;
After equipotential electrician carries out safety measure, be sitting in chair lift, high tower operating personnel controls pull rope well, under the cooperation of tackle pulley, slowly transfers equipotential electrician to side of wire;
Equipotential electrician, when arriving side of wire, catches rapidly wire to enter electric field, and is straddled on two root wires by transfer in chair lift, and accomplish fluently safety belt, and move to insulator string side, chair lift is pulled away from side of wire by high tower operating personnel;
A kind of insulation is provided to transmit rope, one end of insulation transmission rope is transferred and is passed to equipotential electrician by high tower operating personnel, insulation is transmitted rope and is tied up on the grading ring of side of wire yoke plate by equipotential electrician, and remove grading ring bolt, grading ring is disassembled from side of wire yoke plate, and be delivered to cross-arm by insulation transmission rope under the cooperation of high tower operating personnel; Now side of wire yoke plate is vacated two installing holes;
Lower jig in hot-line insulator string replacement power tool is transmitted rope by insulation and sends equipotential electrician to by high tower operating personnel, the upward cover of left card of lower jig is inserted on side of wire yoke plate by equipotential electrician, and two installing holes screw of two on left card aimed on side of wire yoke plate, then inserting bolt is fastenedly connected;
Wire grip in hot-line insulator string replacement power tool is connected with insulated tension pole by high tower operating personnel, and send one end of wire grip to equipotential electrician by insulation transmission rope, now high tower operating personnel and equipotential electrician coordinate, by high tower operating personnel, insulated tension pole is connected to the right card of upper jig, equipotential electrician is then by wire grip and lower jig connection;
It is stressed to hot-line insulator string replacement power tool that equipotential electrician operates wire grip, then it is lax to insulator string to operate lifting lead wire further; Check, change insulator string,
Equipotential electrician again operates wire grip until insulator string recovers stress, then oppositely removes wire grip and lower jig; High tower operating personnel removes insulated tension pole and upper jig, then the grading ring of side of wire yoke plate is transmitted rope by insulation and send equipotential electrician to, the grading ring of this side of wire yoke plate is installed by equipotential electrician, chair lift is passed to equipotential electrician by last high tower operating personnel again, operation pull rope, moves cross-arm place to by carrying the chair lift of holding equipotential electrician.
2. 220kV long span super high town suspension insulator charged for replacement method according to claim 1, is characterized in that, the person of high tower operating personnel and equipotential electrician and the safe distance of entrained nonisulated instrument and electrified body are greater than 1.8 meters; The combinational gap that equipotential electrician passes in and out electric field is greater than 2.1 meters.
3. 220kV long span super high town suspension insulator charged for replacement method according to claim 1, is characterized in that, the position that equipotential electrician arrives side of wire to flush with wire with its waist and is as the criterion.
4. 220kV long span super high town suspension insulator charged for replacement method according to claim 1, is characterized in that, when equipotential electrician transmit or receive grading ring time, grading ring colligation with the state of horizontal traverse away from insulator string transmission.
5. 220kV long span super high town suspension insulator charged for replacement method according to claim 1, it is characterized in that, in described hot-line insulator string replacement power tool, the right card of upper jig and lower jig is a kind of solid component, and itself and wire grip or insulated tension pole intersect and tight joint.
6. 220kV long span super high town suspension insulator charged for replacement method according to claim 1, is characterized in that, the relatively right card of left card tilts, and the junction of the two is near left card fork pockets root place, and jig entirety becomes a kind of bent.
7. 220kV long span super high town suspension insulator charged for replacement method according to claim 1, it is characterized in that, described wire grip includes outer loop bar, nut sleeve, screw rod, operating grip, adjustment means, fixed mount and gear train; Outer loop bar comprises upper boom and lower beam, and nut sleeve is positioned at the inner chamber of outer loop bar, through whole outer loop bar, and screw rod is arranged in nut sleeve inner chamber, and two ends expose to outside nut sleeve, and is respectively arranged with the first connecting portion and the second connecting portion; Adjustment means includes the cross bar that is connected with operating grip and is positioned at the connecting rod of crossbar end perpendicular to cross bar, connecting rod and the T-shaped structure of cross bar, connecting rod is a kind of ratchet mechanism, and corresponding crossbar end is a kind of detent mechanism, and the two connects to form click component; The two ends of connecting rod are respectively fixedly connected with lower beam with upper boom respectively by one group of fixed mount; Gear train includes intermeshing driving wheel and driven pulley, and wherein driving wheel is diameter comparatively pinion, and driven pulley is larger diameter gear, driving wheel is arranged on the side of connecting rod, between cross bar and fixed mount, driven pulley, between upper boom and lower beam, is fixedly connected with nut sleeve.
8. 220kV long span super high town suspension insulator charged for replacement method according to claim 7, it is characterized in that, screw rod comprises screw rod and lower screw rod, upper screw rod is positioned at a side of nut sleeve inner chamber, the one end exposing to nut sleeve connects the first connecting portion, lower screw rod is positioned at another side of nut sleeve inner chamber, and the other end exposing to nut sleeve connects the second connecting portion, and upper screw rod is rightabout screw thread with the internal thread of the nut sleeve that the corresponding spiral of lower screw rod connects.
9. 220kV long span super high town suspension insulator charged for replacement method according to claim 8, it is characterized in that, the one end being positioned at nut sleeve inner chamber at upper screw rod and lower screw rod is provided with retaining pin, corresponding is provided with spacing hole slot inside the both ends of nut sleeve, spacing hole slot and retaining pin suitable.
10. 220kV long span super high town suspension insulator charged for replacement method according to claim 7, it is characterized in that, in adjustment means, a cuphead pilotage is provided with in cross bar, the ratchet in detent mechanism is withstood in this cuphead pilotage one end, and the other end is connected to by a spring and the hold-down screw that is connected with spring the end that cross bar is connected with operating grip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310086976.0A CN103227431B (en) | 2013-03-19 | 2013-03-19 | 220kV long span super high town suspension insulator charged for replacement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310086976.0A CN103227431B (en) | 2013-03-19 | 2013-03-19 | 220kV long span super high town suspension insulator charged for replacement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103227431A CN103227431A (en) | 2013-07-31 |
| CN103227431B true CN103227431B (en) | 2015-12-23 |
Family
ID=48837760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310086976.0A Active CN103227431B (en) | 2013-03-19 | 2013-03-19 | 220kV long span super high town suspension insulator charged for replacement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103227431B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683110B (en) * | 2013-12-26 | 2016-10-19 | 国家电网公司 | L-LF pattern insulator chain ground potential electrification replacing operational method |
| CN103715633B (en) * | 2014-01-20 | 2016-03-30 | 国家电网公司 | Strain insulator single hole yoke plate replacing insulator string method |
| CN103825222B (en) * | 2014-03-25 | 2016-09-14 | 国家电网公司 | A kind of charged for replacement 220kV narrow base tower strain insulator string instrument |
| CN103825223B (en) * | 2014-03-25 | 2016-09-14 | 国家电网公司 | Charged for replacement 220KV narrow base tower strain insulator string tool and operational method |
| CN104218493B (en) * | 2014-08-13 | 2017-03-01 | 国家电网公司 | ± 800kV UHVDC Transmission Lines live-line replacing strain hard tube mother's wire jumper insulator technique |
| CN104538891B (en) * | 2014-12-15 | 2017-09-26 | 国家电网公司 | A kind of composite insulator outlet method |
| CN104505768B (en) * | 2014-12-15 | 2017-08-25 | 国家电网公司 | Composite insulator outlet bridge |
| CN105429052A (en) * | 2015-12-22 | 2016-03-23 | 国网福建省电力有限公司泉州供电公司 | Replacing clamp, replacing apparatus and method for tension insulator |
| CN105406401A (en) * | 2015-12-22 | 2016-03-16 | 国网福建省电力有限公司泉州供电公司 | Triangular yokeplate clamping apparatus, double-string strain insulator replacing device and double-string strain insulator replacing method |
| CN107342553B (en) * | 2017-04-14 | 2022-12-02 | 国家电网公司 | Replacing fixture and replacing method for linear duplex V-string insulator |
| CN107275978A (en) * | 2017-06-26 | 2017-10-20 | 国网辽宁省电力有限公司铁岭供电公司 | A kind of tower face operation guard method |
| CN108206482B (en) * | 2018-01-23 | 2024-01-05 | 国网福建省电力有限公司 | Live replacement operation method for LF type yoke plate insulator without operation hole |
| CN109616945A (en) * | 2018-12-17 | 2019-04-12 | 广东电网有限责任公司 | A kind of power line hot line robot electric-control system and electric-control method |
| CN109830913A (en) * | 2019-02-11 | 2019-05-31 | 国家电网有限公司 | The combination tool and method of vertical rotary method replacement direct current grounding pole line tension string |
| CN110112678A (en) * | 2019-06-20 | 2019-08-09 | 中国南方电网有限责任公司超高压输电公司柳州局 | A kind of complete Work tool of charged for replacement duplex V-type pendency composite insulator |
| CN114273901B (en) * | 2022-01-25 | 2024-03-26 | 国网安徽省电力有限公司电力科学研究院 | Integrated dismounting device for needle insulator |
| CN114552482A (en) * | 2022-03-18 | 2022-05-27 | 广东电网有限责任公司 | Insulator replacement tool |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202127198U (en) * | 2011-06-16 | 2012-01-25 | 山东电力集团公司济南供电公司 | 220 KV tension-string double-splitting insulation replacement device for leads |
| KR101149831B1 (en) * | 2010-10-19 | 2012-05-24 | 한전케이피에스 주식회사 | Power Line Supporting Device for replacing Insulator in Transmission Towers |
| CN202550396U (en) * | 2012-02-28 | 2012-11-21 | 云南电网公司带电作业分公司 | Broadsword-shaped fixture for replacing V-shaped double-string insulator of compact 500kV power transmission line |
| CN202696053U (en) * | 2012-07-09 | 2013-01-23 | 辽宁省电力有限公司铁岭供电公司 | Hydraulic broadsword clip |
| JP2013046535A (en) * | 2011-08-26 | 2013-03-04 | Tokyo Electric Power Co Inc:The | Replacing unit for insulator or the like of insulator device for power transmission |
-
2013
- 2013-03-19 CN CN201310086976.0A patent/CN103227431B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101149831B1 (en) * | 2010-10-19 | 2012-05-24 | 한전케이피에스 주식회사 | Power Line Supporting Device for replacing Insulator in Transmission Towers |
| CN202127198U (en) * | 2011-06-16 | 2012-01-25 | 山东电力集团公司济南供电公司 | 220 KV tension-string double-splitting insulation replacement device for leads |
| JP2013046535A (en) * | 2011-08-26 | 2013-03-04 | Tokyo Electric Power Co Inc:The | Replacing unit for insulator or the like of insulator device for power transmission |
| CN202550396U (en) * | 2012-02-28 | 2012-11-21 | 云南电网公司带电作业分公司 | Broadsword-shaped fixture for replacing V-shaped double-string insulator of compact 500kV power transmission line |
| CN202696053U (en) * | 2012-07-09 | 2013-01-23 | 辽宁省电力有限公司铁岭供电公司 | Hydraulic broadsword clip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103227431A (en) | 2013-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103227431B (en) | 220kV long span super high town suspension insulator charged for replacement method | |
| CN102545100B (en) | Live installation tool for space bar of twin-bundled conductor | |
| CN205141520U (en) | Split pin remounting specialized tool | |
| CN202187601U (en) | Single-twisting-grinder double-pole iron tower erecting device of high-voltage power transmission line | |
| CN103618251A (en) | Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line | |
| CN202495706U (en) | Electrified installation tool for double split conductor spacer | |
| CN201466574U (en) | Device for isoelectrically replacing insulator and accessory of iron tower of transmission line | |
| CN204609436U (en) | A kind of pole centralizing device | |
| CN202405695U (en) | Lifting tool for overhead ground wire of steel pipe pole | |
| CN203218785U (en) | Device for live-line replacement of suspended insulator chain of 220kV long-span high towers | |
| CN206640204U (en) | Portable dismantled and assembled insulation operation platform | |
| CN203536865U (en) | Combined wire-tightening tool for tightening line wire | |
| CN206422494U (en) | A kind of novel cable sets up hook | |
| CN205882560U (en) | Special circulation cord rack device of distribution live working earth potential | |
| CN201758253U (en) | Overhaul frame | |
| CN103683132B (en) | The damaged insulating barrier restorative procedure of transmission pressure | |
| CN208308334U (en) | A kind of lifting auxiliary threader | |
| CN202872257U (en) | Opening type slide cable hook | |
| CN208535085U (en) | A kind of steel rope splicing device | |
| CN207377483U (en) | Steel tube tower in electric transmission line aids in climbing tool | |
| CN202678840U (en) | Self-help hand-operated hanging basket for high-voltage wire suspended working | |
| CN206375502U (en) | The crossover device of distribution line unwrapping wire | |
| CN208284910U (en) | The round-the-clock unfolding device of guide rope is crossed over above overhead transmission line | |
| CN202153620U (en) | Equipotential working insulating platform | |
| CN209571769U (en) | A kind of cable high-altitude gap bridge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |