CN105322463A - Insulated outlet extending horizontal ladder for tension string on ultra-high voltage transmission line - Google Patents
Insulated outlet extending horizontal ladder for tension string on ultra-high voltage transmission line Download PDFInfo
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- CN105322463A CN105322463A CN201510802128.4A CN201510802128A CN105322463A CN 105322463 A CN105322463 A CN 105322463A CN 201510802128 A CN201510802128 A CN 201510802128A CN 105322463 A CN105322463 A CN 105322463A
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- horizontal ladder
- transmission line
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Abstract
The invention relates to an insulated outlet extending horizontal ladder for a tension string on an ultra-high voltage transmission line, in particular to the insulated outlet extending horizontal ladder for the tension string for passing in and out, which can be applied to a +/-800kV transmission line. The insulated outlet extending horizontal ladder is characterized by comprising a lower fixed horizontal ladder (2), wherein a cross arm connection end (1) is arranged at one end of the lower fixed horizontal ladder (2), so that the cross arm connection end (1) can be hinged with an iron tower cross arm; an extending pulley mechanism is arranged on the lower fixed horizontal ladder (2); a slideable upper sliding extending horizontal ladder (3) is arranged in the extending pulley mechanism; a clamping seat frame (4) is arranged at one end of the upper sliding extending horizontal ladder (3); and clamping seats (5) are arranged on the clamping seat frame (4), so that the camping seats (5) can be clamped on a tension hardware string. A frame structure and an upper and lower dual-layer sliding form are adopted by the extending horizontal ladder provided by the invention, so that the extending horizontal ladder adapts to the hardware string lengths of the lines with different lengths through the increasing or reducing length of extension of the upper horizontal ladder, and is quick to assemble and firm and reliable in connection.
Description
Technical field
The present invention relates to the flexible flat ladder of a kind of UHV transmission line strain insulator-string insulation outlet, be one can be used in ± 800kV transmission line on the insulation outlet retractable cat ladder for strain insulator-string turnover.
Background technology
Along with the continuous expansion of China's electrical network scale, improving constantly of UHV transmission, ± 800kV direct current transportation is transmission voltage the highest grade, the state-of-the-art direct current transportation mode of technology in the world.Increasing electricity conveying task is carry, so higher to the reliability requirement of circuit at China's extra-high voltage direct-current.Generally, once, other urgent defects of process circuit, can only take live line working mode to the annual interruption maintenance of extra high voltage direct current transmission line, live line working is the Main Means of power transmission and transforming equipment test, maintenance, transformation, and the fail safe of operating type is very important.In order to ensure the reliability service of UHV transmission line, improving the continuous reliability service ability of electric power system, how to ensure live-working safety, fast, becoming the important research direction of extra-high voltage electrified operation.Simultaneously, UHV transmission line turnover strain tower insulator string is a very difficult thing, one is that the prolongation gold utensil that is connected with strain insulator-string of UHV transmission line shaft tower is all in 2.5-4 rice distance, from shaft tower, operating personnel moves to that strain insulator-string carries out overhauling is a very difficult thing, personnel adopt the mode operation of climbing gold utensil turnover usually, personnel pass in and out time-consuming, effort, and coefficient of safety is low.Two be live line working during, if adopt cat ladder, cat ladder must be isolation material, could meet live line working requirement.
In sum, there is very large potential safety hazard in current turnover extra high voltage direct current transmission line strain rod tower, operating type is time-consuming, effort, so need to innovate the device that a kind of support staff passes in and out extra high voltage direct current transmission line strain insulator-string, meets the requirement of live line working simultaneously.
Summary of the invention
The object of this invention is to provide the flexible flat ladder of a kind of UHV transmission line strain insulator-string insulation outlet, a kind of cat ladder passing in and out extra high voltage direct current transmission line strain insulator-string for less important work personnel can be provided, live line working requirement can be met simultaneously, the fail safe of raising personnel operation, ensures power circuit safe and stable operation.
The flexible flat ladder of a kind of UHV transmission line strain insulator-string insulation outlet, its special feature is: comprise the fixing flat ladder of lower floor, the one end fixing flat ladder in this lower floor is provided with cross-arm connection end thus can be hinged with steel tower cross-arm, fix on flat ladder in this lower floor and flexible pulley mechanism is installed, the flat ladder of slidably upper strata sliding extension is installed in this flexible pulley mechanism, this upper strata sliding extension put down ladder one end deck frame is installed, this deck frame is provided with deck thus can clip on strain hardware fitting string.
Wherein also comprise recovery pull rope, one end of this recovery pull rope is fixed on upper strata sliding extension and puts down on ladder.
Wherein also comprise and stretch out pull rope, this one end of stretching out pull rope is fixed on upper strata sliding extension and puts down on ladder, and its other end is fixed in the fixed pulley flat ladder from lower floor and passed.
Wherein at the two ends of deck frame, a deck is installed separately, and deck adopts U-shaped metal string deck.
Wherein flexible pulley mechanism comprises at least 4 and is arranged on lower floor and fixes pulley yoke on flat ladder, and each pulley yoke is all provided with a upper strata pulley and lower floor's pulley by wheel shaft.
Of the present invention flexible flat terraced due to employing frame structure, upper and lower two-layer slip form, adapt to different length line hardware string by the flexible increase of the flat ladder in upper strata or minimizing length long, assembling is quick, firm and reliable connection.Flexible flat terraced termination and tower body adopt and are articulated and connected, easy to assembly.Do not need on the ground to assemble separately, operation installation on tower can be completed at that time, and just can complete rapidly maintenance task, eliminating hidden danger recovers normal power transmission.Composite material used all adopts anti-oxidant, corrosion-resistant treatments, steel construction piece adopts galvanizing surface treatment, enhance the resistance to corrosion of material, ensure that the advantages such as the good electric property of outlet retractable cat ladder, long working life, improve operating personnel and pass in and out the fail safe of extra high voltage direct current transmission line strain insulator-string, shorten the activity duration, indirectly improve electric network reliability.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of flexible pulley mechanism part in the present invention;
Accompanying drawing 2 is the structural representation of deck frame 4 and deck 5 part in the present invention;
Accompanying drawing 3 is structural representation of the present invention.
Embodiment
As shown in Figure 1, 2, 3, the invention provides the flexible flat ladder of a kind of UHV transmission line strain insulator-string insulation outlet, comprise the fixing flat ladder 2 of lower floor, the one end fixing flat ladder 2 in this lower floor is provided with cross-arm connection end 1 thus can be hinged with steel tower cross-arm, the fixing flat ladder 2 of this lower floor is provided with flexible pulley mechanism, the flat ladder 3 of slidably upper strata sliding extension is installed in this flexible pulley mechanism, this upper strata sliding extension put down ladder 3 one end deck frame 4 is installed, this deck frame 4 is provided with deck 5 thus can clip on strain hardware fitting string.Specifically at the two ends of deck frame 4, a deck 5 is installed separately, and deck 5 adopts U-shaped metal string deck.
Wherein flexible pulley mechanism comprises 6 and is arranged on lower floor and fixes pulley yoke 6 on flat ladder 2, each pulley yoke 6 is all provided with a upper strata pulley 9 and lower floor's pulley 10 by wheel shaft, thus between upper strata pulley 9 and lower floor's pulley 10, forms slideway to install the flat ladder 3 of slidably upper strata sliding extension.
Wherein also comprise and reclaim pull rope 8, one end of this recovery pull rope 8 is fixed on the flat ladder 3 of upper strata sliding extension.Also comprise and stretch out pull rope 7, this one end of stretching out pull rope 7 is fixed on the flat ladder 3 of upper strata sliding extension, and its other end is fixed in the fixed pulley flat ladder 2 from lower floor and passed.
Embodiment 1:
A kind of flexible flat ladder, comprise that lower floor's canned paragraph puts down terraced principal post, upper strata telescopic section puts down terraced principal post, stull cross section, other metal connecting piece materials, flat terraced termination, flexible flat terraced slide mechanism, flat terraced side of wire and hardware string clip.It is the flat plate in cross section 70 × 19 that above-mentioned lower floor's canned paragraph puts down terraced principal post, and every root length has 1.7 meters; Stull cross section
filled and process pipe; Fabric width 500.Above-mentioned upper strata telescopic section puts down the flat plate in terraced principal post cross section 70 × 19, and every root length has 1.7 meters; Stull cross section
filled and process pipe; Fabric width 430.Other metal connecting piece material is Q345.
The above-mentioned flat terraced termination being common to these two kinds of cross-arms, considers corner tower, and need there be rotatable function termination according to line alignment.Above-mentioned flexible flat terraced slide mechanism, the flat ladder of slide mechanism and lower floor is installed fixing, by (extension ladder) pulley yoke 6, axially two-layer pulley forms vertically, the principal post of ladder is just put down in gap between upper and lower layer pulley 9,10 by upper strata, have three groups of slide mechanisms and form a slideway, upper strata is put down ladder and is just utilized this slideway to realize Telescopic.Above-mentioned flat terraced side of wire and the clip of hardware string are adjustable, deck 5 is based on the flat plate of 50 × 12 by a block specifications, two ends are provided with the installing hole of U-shaped metal string deck at a distance of 650mm, 1300mm place, U-shaped metal string deck inner chamber is a bit larger tham the width of wire hardware string.
Wherein the flat ladder of insulating telescopic is two-layer up and down.Define a slideway space between the flat ladder of lower floor and pulley yoke 6, put down ladder for upper strata and realize Telescopic.Flat terraced front end deck 5 has adjustable function and can adapt to ± requirement of 800kV power line tension three string and tension resistant four-serial.Cross-arm connection end 1 and steel tower cross-arm connected mode are radial type, can follow the trend of line hardware string and rotate.
Using method of the present invention and operation principle are:
The invention provides one may be used for the ± flexible flat ladder of the strain insulator-string outlet of 800kV circuit, comprise cross-arm connection end 1, the fixing flat ladder 2 of lower floor, the flat ladder 3 of upper strata sliding extension, pulley yoke 6, stretch out pull rope 7, reclaim pull rope 8 and flat terraced stopping mechanism.The principle of stopping mechanism (retrogressing) backstop is arranged on upper strata sliding extension to put down in the stull of ladder 3, and backstop is hook, and when sliding extension flat ladder 3 in upper strata stretches out to side, backstop runs into fixing flat terraced 2 stulls of lower floor and stirs and jump over.When sliding extension flat ladder 3 in upper strata withdraws to opposite side, backstop runs into the fixing flat terraced 2 stull backstops of lower floor and hooks stull make sliding extension flat ladder 3 in upper strata can not continue to withdraw action because retreating spacing obstruction.
Be connected with hinged by the construction hanging hole that cross-arm connection end 1 is reserved with steel tower cross-arm during use, pull and stretch out pull rope 7 and upper strata sliding extension is put down ladder 3 and fix by lower floor the slideway that flat ladder 2 and pulley yoke 6 formed and stretch out to strain hardware fitting string, when extending out to appropriate location, flat for upper strata sliding extension ladder 3 is fallen, make upper strata sliding extension put down terraced 3 front end deck framves 4 and deck 5 clip on strain hardware fitting string, form a stable structure frame.Now staff walks or rides on flat ladder, moves to porcelain vase side and starts to carry out work.After the rear staff that worked is back to steel tower cross-arm by former road, pull and reclaim pull rope 8 by the withdrawal of flat for upper strata sliding extension ladder 3, take the cross-arm connection end 1 be connected with steel tower cross-arm apart, then entirety falls to ground.
Those of ordinary skill in the art will be appreciated that, it is of the present invention that above embodiment is only used to explanation, and be not used as limitation of the invention, as long as in spirit of the present invention, all will drop in Claims scope of the present invention the change of the above embodiment, modification.
Claims (5)
1. the flexible flat ladder of UHV transmission line strain insulator-string insulation outlet, it is characterized in that: comprise the fixing flat ladder (2) of lower floor, in one end of the fixing flat ladder (2) of this lower floor, cross-arm connection end (1) is installed thus can be hinged with steel tower cross-arm, the fixing flat ladder (2) of this lower floor is provided with flexible pulley mechanism, the flat ladder (3) of slidably upper strata sliding extension is installed in this flexible pulley mechanism, one end of the flat ladder (3) of this upper strata sliding extension is provided with deck frame (4), this deck frame (4) is provided with deck (5) thus can clip on strain hardware fitting string.
2. the flexible flat ladder of UHV transmission line strain insulator-string insulation outlet as claimed in claim 1, it is characterized in that: wherein also comprise and reclaim pull rope (8), one end of this recovery pull rope (8) is fixed on the flat ladder (3) of upper strata sliding extension.
3. the flexible flat ladder of UHV transmission line strain insulator-string insulation outlet as claimed in claim 1, it is characterized in that: wherein also comprise and stretch out pull rope (7), this one end of stretching out pull rope (7) is fixed on the flat ladder (3) of upper strata sliding extension, and its other end passes from the fixed pulley the fixing flat ladder (2) of lower floor.
4. the flexible flat ladder of UHV transmission line strain insulator-string insulation outlet as claimed in claim 1, it is characterized in that: wherein at the two ends of deck frame (4), a deck (5) is installed separately, and deck (5) adopts U-shaped metal string deck.
5. flat ladder as flexible in the UHV transmission line strain insulator-string insulation outlet in Claims 1-4 as described in any one, it is characterized in that: wherein flexible pulley mechanism comprises at least 4 pulley yokes (6) be arranged on the fixing flat ladder (2) of lower floor, and each pulley yoke (6) is all provided with a upper strata pulley (9) and lower floor's pulley (10) by wheel shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802128.4A CN105322463B (en) | 2015-11-19 | 2015-11-19 | UHV transmission line strain insulator-string insulation outlet stretches flat ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510802128.4A CN105322463B (en) | 2015-11-19 | 2015-11-19 | UHV transmission line strain insulator-string insulation outlet stretches flat ladder |
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| Publication Number | Publication Date |
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| CN105322463A true CN105322463A (en) | 2016-02-10 |
| CN105322463B CN105322463B (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510802128.4A Active CN105322463B (en) | 2015-11-19 | 2015-11-19 | UHV transmission line strain insulator-string insulation outlet stretches flat ladder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508191A (en) * | 2017-06-20 | 2017-12-22 | 国网福建省电力有限公司泉州供电公司 | Power line tension bar intelligence outlet method |
| CN108462100A (en) * | 2018-02-27 | 2018-08-28 | 国家电网公司 | A kind of six or three hanging point strain insulator-string operating platform of ± 800 kV UHVDC Transmission Lines |
| CN108952553A (en) * | 2018-08-01 | 2018-12-07 | 国网浙江省电力有限公司金华供电公司 | Ground electrode circuit Equipotential ladder and its application method |
| CN111668747A (en) * | 2020-05-08 | 2020-09-15 | 中国电力科学研究院有限公司 | Device and method for entering and exiting alternating-current extra-high voltage composite cross arm live working area |
| CN112523676A (en) * | 2020-11-27 | 2021-03-19 | 国网山东省电力公司烟台供电公司 | Climbing assistor for insulating rope ladder of power transmission line |
| WO2022252589A1 (en) * | 2021-05-31 | 2022-12-08 | 青海送变电工程有限公司 | Climbing ladder for power transmission line maintenance |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508191A (en) * | 2017-06-20 | 2017-12-22 | 国网福建省电力有限公司泉州供电公司 | Power line tension bar intelligence outlet method |
| CN107508191B (en) * | 2017-06-20 | 2023-02-10 | 国网福建省电力有限公司泉州供电公司 | Intelligent wire outgoing method for tension-resistant rod of power transmission line |
| CN108462100A (en) * | 2018-02-27 | 2018-08-28 | 国家电网公司 | A kind of six or three hanging point strain insulator-string operating platform of ± 800 kV UHVDC Transmission Lines |
| CN108952553A (en) * | 2018-08-01 | 2018-12-07 | 国网浙江省电力有限公司金华供电公司 | Ground electrode circuit Equipotential ladder and its application method |
| CN108952553B (en) * | 2018-08-01 | 2023-12-05 | 国网浙江省电力有限公司金华供电公司 | Grounding electrode line equipotential ladder and use method thereof |
| CN111668747A (en) * | 2020-05-08 | 2020-09-15 | 中国电力科学研究院有限公司 | Device and method for entering and exiting alternating-current extra-high voltage composite cross arm live working area |
| CN112523676A (en) * | 2020-11-27 | 2021-03-19 | 国网山东省电力公司烟台供电公司 | Climbing assistor for insulating rope ladder of power transmission line |
| CN112523676B (en) * | 2020-11-27 | 2022-08-02 | 国网山东省电力公司烟台供电公司 | Climbing assistor for insulating rope ladder of power transmission line |
| WO2022252589A1 (en) * | 2021-05-31 | 2022-12-08 | 青海送变电工程有限公司 | Climbing ladder for power transmission line maintenance |
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