KR20080078104A - Method of construction a helicopter transmission of electricity line use rope ultra high molecular weight poly-ethylene - Google Patents

Method of construction a helicopter transmission of electricity line use rope ultra high molecular weight poly-ethylene Download PDF

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Publication number
KR20080078104A
KR20080078104A KR1020070017682A KR20070017682A KR20080078104A KR 20080078104 A KR20080078104 A KR 20080078104A KR 1020070017682 A KR1020070017682 A KR 1020070017682A KR 20070017682 A KR20070017682 A KR 20070017682A KR 20080078104 A KR20080078104 A KR 20080078104A
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South Korea
Prior art keywords
rope
helicopter
transmission line
transmission tower
transmission
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Application number
KR1020070017682A
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Korean (ko)
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경 환 정
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경 환 정
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
    • H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G11/00—Arrangements of electric cables or lines between relatively-movable parts
    • H02G11/02—Arrangements of electric cables or lines between relatively-movable parts using take-up reel or drum
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device

Abstract

A helicopter construction method of a power transmission line using an ultra high molecular weight poly-ethylene rope is provided to reduce the number of helicopter flights by doubling the length of a stranded wire in construction of the power transmission line through a helicopter. A helicopter construction method of a power transmission line using an ultra high molecular weight poly-ethylene rope(10) includes the steps of: installing a drum space and an engine space before and behind a power transmission tower(30) according to a construction plan; installing pulleys(11) in a steel tower reinforcing unit after installing a protection foothold to install a stranded wire in the power transmission tower; installing the ultra high molecular weight poly-ethylene rope in the power transmission tower by connecting a strander(40) to a helicopter(20) after winding the rope around the strander; installing a wire rope in the power transmission line by connecting the wire rope to an end of the installed ultra high molecular weight poly-ethylene rope to strand the ultra high molecular weight poly-ethylene rope through the engine space; installing the power transmission line in the power transmission tower by connecting the power transmission line to one end of the installed wire rope to pull the wire rope through the engine space; and finally inspecting the power transmission line after fixing the power transmission line installed in the power transmission tower through a fixing unit.

Description

Method of construction a helicopter transmission of electricity line use rope Ultra High Molecular Weight Poly-ethylene}

1 is a process diagram of the overall construction for twisting the transmission line of the transmission tower according to the present invention.

Figure 2 is a work flow diagram for the twisted pair transmission tower transmission line using the helicopter of the present invention.

Figure 3 is an exemplary view showing an embodiment of a twisted pair transmission transmission line transmission line using the helicopter of the present invention.

Figure 4a is a front view of a twisted pair connected to the helicopter to twist the transmission tower transmission line of the present invention.

Figure 4b is a side view of a twisted pair connected to the helicopter to twist the transmission tower transmission line of the present invention.

Figure 4c is a plan view of a helicopter twisted pair to twist the transmission line transmission line of the present invention.

Figure 5 is an illustration of a twisted pair installed in the helicopter to twist the transmission line to the transmission tower according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: Live special fiber rope 11: stranded pulley

20: helicopter 30: transmission tower

40: twisted pair 41: frame

42: Reel Wind 43: Jijiba

44: Hook 45: Air brake module

46: hydraulic brake 47: manual clutch

48: oxygen tank 49: rope guide

 The present invention relates to a transmission line twisted-line method using a helicopter for the construction of a transmission line of a transmission tower, and more particularly, to ultra-high molecular weight PE high strength yarn (Ultra High Molecular Weight Poly) in a twister of a helicopter to install a transmission line in a constructed transmission tower. Winding an active special fiber rope made of -ethylene: UHMWPE) and twisting it on the transmission line to install the transmission line.Tensioning the transmission line through several steps sequentially according to the thickness of the stranded wire. The present invention relates to a twisted pair construction method of a transmission tower transmission line using a helicopter live rope, which can reduce the construction process for laying stranded wires and reduce air and construction costs by installing in the construction.

Conventionally, after constructing a transmission tower, a stranded wire made of primary PP rope having a diameter of 8 mm or 10 mm cannot be constructed by a high voltage transmission line made of coarse steel at a time in order to connect a transmission line. After installing the 2nd PP rope of 12mm or 14mm to one end of the installed 1st PP rope, and driving the engine field to be able to wind the 1st PP rope, the 1st PP rope is Winding in the engine station, secondary PP rope is installed in the transmission tower.

As described above, when the secondary P.P rope is installed in the transmission tower, a 16mm or 18mm wire rope is connected to one end of the secondary P.P rope, and then the wire rope is constructed on the transmission tower by winding the secondary P.P rope using an engine field.

When the wire rope is installed as described above, after connecting the transmission line to one end of the wire rope and winding the wire rope to the engine field using the engine field, the wire rope is wound and the transmission line is installed in the transmission tower.

The conventional transmission line construction method installed as described above requires only tens of thousands of steps to install a transmission line installed at several kilometers since only one 1,500m to 2,000m of cable strands can be installed. There was a problem that took time and air.

Therefore, in recent years, a helicopter is laying a twisted pair made of PP ropes, but the helicopter is also heavy, so the distance of laying the stranded wire in the transmission tower is only 1,500 to 2,000m. There was a problem that the construction cost increases by doing the work.

The specifications of P.P ropes currently used are shown in Table 1 below.

Figure 112007015514692-PAT00001

As can be seen in Table 1, the unit weight (200m) of the P.P rope, tensile strength, only one time 1500 ~ 2000m of stranded wire, there is a problem that can be wound only about 1,500m P.P rope to the twisted pair of the helicopter.

Based on Table 1, for example, look at the existing embodiment in detail as follows.

First, after constructing the transmission tower, the 10mm P.P rope is wound around the twisted pair of helicopters and then hypothesized on the transmission tower.

At this time, the 10mm PP rope wound on the twisted pair has a weight of 9.6kg per 200m, has a tensile force of 1.29 tons, and the total length of the PP rope wound on the twisted pair is 1,500m, which is the weight that the helicopter can carry. The rope cannot be wound on the twisted pair. In addition, a 10mm PP rope with a tensile strength of 1.29 ton per unit weight will not be able to pull the 18mm wire rope due to the limit of tensile strength, and the wire rope will not be able to be wound and transported on a twisted pair of helicopters. do.

Therefore, after installing 10mm PP rope in the transmission tower, after connecting the thicker 16mm PP rope with tensioner to one end of the PP rope, pull the 10mm PP rope installed by using the engine length. The guide rope is pulled by the installed roller and a 16mm PP rope is installed on the transmission tower.

After constructing the 16mm PP rope in the transmission tower as described above, connect the 18mm wire rope to one end of the 16mm PP rope, and then pull the 16mm PP rope with an engine length (winding machine). The ropes are laid so that the transmission lines can be stranded to build transmission lines in the transmission tower.

As can be seen from the above, in order to construct a transmission line in a transmission tower constructed at a certain distance, a section of 1500m to 2,000m is used for one section because of the tensile strength pulled when the transmission line is stranded and the limit of the length according to the weight that can be moved by the helicopter twister. As a result, the 10 mm PP rope was repeatedly installed in a plurality of sections, thereby limiting the cost of operating the helicopter and operating the helicopter according to weather conditions.

  In addition, in order to install 18mm wire rope on the transmission tower, constraints are generated according to the tensile strength of the stranded wire. First, 10mm PP rope is installed in the transmission tower by helicopter, and then 16mm PP rope is stranded again, followed by 16mm PP. By repeating the 18mm wire rope using a rope and repeating a plurality of sections by constructing the transmission line in the transmission tower, the air for constructing the transmission line is long and the construction cost is considerably required. There was this.

The present invention is to solve such a problem, in order to construct a transmission line to the constructed transmission tower, a special fiber rope made of ultra high molecular weight PE (Ultra High Molecular Weight Poly-ethylene: UHMWPE) in the twisted pair of helicopter Temporary process for laying out a stranded wire by installing a stranded wire in a transmission tower with one or two twisted pairs of work in order to install the stranded wire by winding and twisting the stranded wire through several steps in sequence according to the thickness. The purpose of the present invention is to provide a helicopter twisted pair construction method for transmission tower transmission lines using live special fiber ropes, which can reduce air and construction costs.

Hereinafter, an embodiment of the present invention will be described in detail.

Installing a drum yard and an engine yard (winding machine) on the front and rear of the transmission tower according to a construction plan after the construction of the transmission tower;

Installing a protective footrest to install a twisted pair in the transmission tower and installing a pulley in the steel tower reinforcement unit;

Helicopter live with a specification of 12mm in diameter, unit weight (200m), 19.00kg tensile strength of 16.5 tons, and one stranded strand length of 3,000m, which is a stranded wire made of PE High Strength Yarn (UHMWPE). Winding special fiber ropes and installing them in a transmission tower;

Helicopter active special fiber rope (10) by connecting the wire rope having a diameter of 18mm, unit weight (200m) 30.8kg, tensile strength 3.80 ton to one end of the installed helicopter live special fiber rope (winding machine) Twisting the wire rope to install the wire tower;

Connecting a transmission line to one end of the hypothesized wire rope and pulling the wire rope to an engine field to install the transmission line in the transmission tower;

The construction of the transmission tower transmission line is performed by fixing the installation of the transmission line installed in the transmission tower by using an ordinary fixed accessory and finally inspecting the transmission line.

When explaining the embodiment according to the transmission line construction step of the transmission tower of the present invention made in this way as follows.

First step: to install transmission lines in transmission towers Drum Engine  install

After constructing the transmission tower 30 for transporting electricity, supplying a twisted pair or transmission line to the transmission tower and securing a site in front of the first transmission tower where the transmission line starts to draw, the drum is installed.

The drum is installed in a state in which a wire rope or a transmission line is wound, and the site where the drum is installed is installed with other necessary equipment.

In addition, if the ground of the site is a non-declining slope, the drum is cut horizontally and then the drum and other equipment are installed.

After the drum is installed, the engine is installed at the rear of the transmission tower 30 located 3km to 4km from the drum.

The engine field is a winding machine while pulling the helicopter wire special fiber rope (10) or wire rope installed in the transmission tower so that the transmission line can be twisted.

In the present invention, other equipment such as a tensioner for connecting a wire rope with a helicopter live special fiber rope or a wire rope for twisting a wire with a wire rope may use the same as before, and thus, a detailed description thereof will be omitted.

2nd step: transmission tower block  install

When the transmission tower is constructed, the twisted pair pulleys 11 serving as the guardrail rails are installed in order to install a plurality of transmission lines on both sides of the transmission tower 30. Protective footrests and stranded pulleys are installed to ensure this safe operation. The protective footrest is a footrest that allows a person to work freely, and the stranded pulley enables the stranded wire to be connected to the stranded pulley 11 by connecting a rope (stranded boat) installed on a transmission tower.

The step of installing the protective footrest and the step of installing the stranded pulley 11 carried out in the present invention are carried out in the same manner as in the general technical configuration.

After the protective footrest and the twisted pair 11 pulley are installed as described above, the stranded pulley 11 is installed in the transmission tower 30 at the portion where the transmission line is installed.

Step 3: use a helicopter on the transmission tower Live special fiber rope  Laying

 As described above, when the preparation of the stranded roller 11 is installed in the transmission tower 30 to guide the stretched vessel, the live special fiber rope 100 of the present invention is installed in the transmission tower using the helicopter 20.

The helicopter live special fiber rope installed in the transmission tower is made of PE High Strength Yarn (Ultra High Molecular Weight Poly-ethylene: UHMWPE) The size of the helicopter live special fiber rope used in the present invention is 12 mm in diameter, unit weight (200 m) 19.00 ㎏ tensile strength of 16.5 tons, one stranded wire 3,000 m made of a winding wire to the stranded wire (40) mounted on the helicopter will be installed in the transmission tower.

Looking at the helicopter live special fiber rope used in the present invention is shown in Table 2.

Figure 112007015514692-PAT00002

As can be seen in Table 2, the live special fiber rope used in the present invention is lighter in unit weight than the conventional wire rope, while the tensile strength is high.

Therefore, even if the live special fiber rope of the present invention uses 12mm, the tensile strength is lighter than the existing 18mm wire rope, the load is lighter and the tensile strength is stronger than the wound on the twisted pair 40 mounted on the helicopter 20 The live special fiber ropes can be wound from 3,000m to 4,000m, so that ships can be wound more than the length of 1,500m to 2,000m where the existing 10mm PP ropes are wound. By doubling the one-time paired affirmation installed in the existing one, the cost of repetitive operation of the helicopter can be reduced while reducing the air.

The helicopter live special fiber rope used in the present invention is an ultra high molecular weight polyethylene fiber made of PE (High Ultra Molecular Weight Poly-ethylene: UHMWPE).

Therefore, the ultra high molecular weight polyethylene fiber is known to have the highest strength among existing fiber materials. In the present invention, it is used as a stranded wire to install a transmission line in a transmission tower by making a rope using the fiber thereof.

Step 4: Install a wire rope transmission tower using a helicopter live special fiber rope

In the third step, the live special fiber rope is installed in the transmission tower by helicopter, connected to the stretching roller 11, and then the one end of the live special fiber rope is connected with the wire rope, and then the live special fiber rope is pulled using the engine length. The wire rope connected to the stage is stretched and installed in the transmission tower (in the present invention, the drum and the engine are conventional and thus not shown).

 At this time, in the prior art, the tensile strength of the PP rope, which is a stranded wire, is weak, so that the wire rope cannot be directly pulled, and the diameter of the PP rope is gradually stranded through several steps. After stretching the wire rope of ㎜ to form a transmission line by twisting the transmission line with a wire rope again in the present invention, the live special fiber rope 10, which is a stranded wire that is first installed in the helicopter 20 to the transmission tower 30 Immediately after the wire rope is stranded with live special fiber rope, the wire rope is stranded again to install the transmission line, thereby greatly shortening the twisted wire step to form a transmission line.

Step 5: fix the transmission line to the transmission tower to form a transmission line

When the transmission line is installed in the transmission tower as described above, the transmission line is completed through the final inspection step after fixing to the transmission tower using insulators, fixed clips, and the like.

The transmission line construction step as described above is proportional to the length of the live twisted special fiber rope, which is the first stranded wire, wound around the twisted pair of the helicopter. Therefore, the live special fiber rope wound on the helicopter twisted pair 40 of the present invention can be wound up to 4,000m due to the light weight of 3,000m. Accordingly, the twisted pair affirmation performed in the present invention is 3,000 m to 4,000 m, and the twisted pair process of the present invention is repeated every 3,000 m to 4,000 m.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a process diagram of the entire construction work for twisting the transmission line of the transmission tower according to the present invention, after the construction of the transmission tower in the present invention is made by a separate transmission line construction plan already prepared.

In the construction plan, the transmission line construction plan is prepared together with the construction of the transmission tower construction plan.

Figure 1 of the present invention as a whole working process diagram for the construction of the transmission line as described briefly as follows.

Drawing up the construction plan for the construction of transmission lines → Installing the drum and engine stations in the one-time positive section to connect the transmission lines → Installation of protective feet to allow people to work on the transmission tower → Reinforce the steel tower to install the transmission lines Pulley installation → Twisted pair of special fiber ropes by helicopter to wire tower → Twisted pair of wire rope with live special fiber rope → Twisted wire line with wire furnace → Fixed transmission line insulators installed on the top, bottom, left and right side of transmission tower and other parts → As a final inspection Construction of the track is carried out.

Figure 2 is a work flow diagram for the transmission line transmission line twisted line using the helicopter of the present invention, a brief summary of the helicopter operation step for twisting the transmission line will be described.

First, after installing the steel tower reinforcement and pulley in the transmission tower in Fig. 1, in order to connect the first one wire to the transmission tower by using a helicopter, select the helipad according to the construction plan → Determine the direction of the helipad followed by special fiber rope winding → If the pulley is not installed, it consists of the step of installing the pulley for twisting the wire.The installation of the live wire special fiber rope wire wound on the stranded wire is installed in the transmission tower, followed by the wire rope wire, the main wire stranded wire and the completion of the transmission line.

Figure 3 is an exemplary view showing an embodiment of the transmission line transmission line working line transmission using the helicopter of the present invention, Figure 3 is an embodiment of the present invention, using a helicopter to install the live line special fiber rope pro which is the first twisted pair in the hand tower As, after the transmission tower is constructed, the live special fiber rope 10 is wound around the twisted pair 40 to install the transmission line. At this time, the live special fiber rope (10) wound on the stretching machine is made of a diameter 12mm, unit weight (200m) 19.00kg tensile strength 16.5 tons, once stranded 3,000m.

 Of course, if the diameter of the live special fiber rope (10) wound on the twisted pair is less than 12mm can be longer than 3,000m, but this one stranded wire can be longer than the length of the winding, but the diameter of 18mm Since the weakness of tensile strength may occur when twisting wire ropes having wire ropes, the wire ropes having a diameter of 18 mm should be stranded after the twisted wire wires smaller than 18 mm may be stranded. It is preferable to use 12 mm live special fiber rope.

In addition, if necessary, winding 12mm live special fiber ropes can be increased by 1,000m to the stranded wire to increase the stranded wire.However, it is not recommended to wind more than 4,000m at a time considering the load carried by the helicopter. .

At this time, it is possible to use a large helicopter to increase the number of twisted pairs more than 4,000m, but in Korea's reality, there are a limited number of models that can be mobilized as working helicopters when constructing transmission towers, and the number of helicopters is limited. One of the reasons for failing to extend the one-time pairing (one working length (distance) is one of the reasons for not being free in securing a working helicopter since the work must be carried out after the operation. The increase of 1500m to 3,000m provides a very innovative construction method for transmission construction.

Figure 4a is a front view of a helicopter twister for twisting the transmission tower transmission line of the present invention, Figure 4b is a side view of a helicopter twister for twisting the transmission tower transmission line of the present invention, Figure 4c is a twisted view of the transmission tower transmission line of the present invention As a top view of a helicopter twister, the twisted pair 40 which is capable of winding the live fiber special fiber rope 10 that is a twisted pair is installed to allow the reel wind 42 (winding drum) to rotate on the frame 41 and to rotate the frame. Is connected to the 41 and the reel wind (42) is formed in the support bar 43 of the "형" type that is connected to both sides and the top, and the connecting ring 44 is provided on both sides of the support bar 43 is connected to the helicopter It is configured to be.

In addition, the air brake module 45 is installed on one side of the reel wind 42 and the frame 41, and the hydraulic brake 46 and the manual clutch 47 are installed on the upper side of the desk frame on which the air brake module 45 is installed. It is possible to control the rotational speed of the wind (42), the manual clutch serves to connect and space the reel wind 42 and the hydraulic brake 46 system.

In addition, the oxygen tank 48 is installed on the front frame 41 of the twisted pair 40 to supply oxygen for the air brake operation, and the rope guide 49 installed on the rear frame is a reel of the twisted pair 40. The live special fiber rope 10 released from the wind 42 serves as a guide to be smoothly released.

Referring to the operation principle of the twisted pair 40 is connected to the helicopter 20 of the present invention configured as described above and winding the live special fiber rope 10 as follows.

The reel wind 42 is wound with a twisted wire live special fiber rope, the oxygen tank 48 is filled with oxygen.

By connecting the air brake module 45, the control tube so that the air brake module 45 and the twisted pair coordinator boarded on the helicopter 20 can be adjusted by the ride controller.

At this time, the coordinator moves the control tube up and down to supply and block air to prevent the twisted pair from being excessively loosened from the twisted pair 40, and after taking off the medallion from the helicopter, proceed with the helicopter to remove the stranded special fiber rope from the twisted pair It will be installed in the transmission tower.

Figure 5 is an exemplary view of a twisted pair installed in the helicopter to twist the transmission line to the transmission tower according to the present invention, showing that the helicopter is stranded by the twister and the helicopter is formed on the top of the twister support bar 43 Connecting a separate rope to the connecting ring 44 is mounted on the helicopter (20).

The separate rope connecting the connection ring 44 and the helicopter 20 of the twisted pair 40 in consideration of the weight of the twisted pair and the weight of the live special fiber rope (10) wound on the reel wind 42, In particular, because the helicopter is a medallion shape of the twisted pair, the rope is selected in consideration of the total weight generated by the twisted pair due to the resistance of the air and gravity during operation.

As described above, the present invention uses the special twisted wire rope to install the transmission line in the transmission tower, and when the construction of the transmission line using a helicopter doubles the length of the stranded line once, thereby reducing the number of helicopter operations. Construction that occurs when installing transmission line because it has the effect of reducing the air by simplifying multi-stage stranded work process by lowering tensile strength by directly stranding 18mm wire rope using saving special fiber rope If the cost is greatly reduced, the air is shortened, and there is an advantage that the operation can be performed efficiently due to less constraints due to weather conditions when operating the helicopter.

Claims (2)

Installing a drum yard and an engine yard (winding machine) on the front and rear of the transmission tower according to a construction plan after the construction of the transmission tower; Installing a protective footrest to install a twisted pair in the transmission tower and installing a pulley in the steel tower reinforcement unit; Winding a special fiber rope of PE high strength yarn to the twister of the helicopter, and then connecting the twister to the helicopter to install in the transmission tower; Connect the wire rope having a diameter of 18mm, a unit weight (200m), 30.8kg, and a tensile strength of 3.80 ton to one end of the installed live special fiber rope to draw a helicopter active special fiber rope to an engine field (winding machine) to wire rope. Hypothesizing the transmission tower; Connecting a transmission line to one end of the hypothesized wire rope and pulling the wire rope to an engine field to install the transmission line in the transmission tower; Helicopter twisted construction method of the transmission tower transmission line using live special fiber ropes characterized in that the final inspection of the transmission line after fixing the installation of the transmission line installed in the transmission tower using the usual fixed accessories. The method of claim 1, The live special fiber rope used as stranded wire is made of PE High Ultra-Low Molecular Weight Poly-ethylene (UHMWPE), diameter 12mm, unit weight (200m) 19.00㎏ s / Pc tensile strength 16.5 tons, one stranded wire Helicopter twisted construction method of transmission tower transmission line using live special fiber rope characterized in that the winding of the helicopter live special fiber rope having a specification of 3,000m to be installed in the transmission tower.
KR1020070017682A 2007-02-22 2007-02-22 Method of construction a helicopter transmission of electricity line use rope ultra high molecular weight poly-ethylene KR20080078104A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101882766A (en) * 2010-06-01 2010-11-10 国网通用航空有限公司 Electric power maintenance helicopter
CN104283162A (en) * 2014-10-27 2015-01-14 广西电网公司电力科学研究院 Distribution network overhead line high-altitude wiring clamp with deicing function
CN105089487A (en) * 2015-09-07 2015-11-25 国网山东省电力公司烟台供电公司 Special portable power transmission line routing inspection rope ladder capable of being operated by single person
CN105625936A (en) * 2016-03-21 2016-06-01 国网甘肃省电力公司经济技术研究院 Portable climbing device
CN105762697A (en) * 2014-02-20 2016-07-13 国家电网公司 Reverse-retreating preventing device in transmission line construction
CN106848932A (en) * 2017-04-10 2017-06-13 国网辽宁省电力有限公司辽阳供电公司 One kind insulation is across line machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101882766A (en) * 2010-06-01 2010-11-10 国网通用航空有限公司 Electric power maintenance helicopter
CN105762697A (en) * 2014-02-20 2016-07-13 国家电网公司 Reverse-retreating preventing device in transmission line construction
CN105762697B (en) * 2014-02-20 2017-09-29 国家电网公司 Anti- race mill apparatus in transmission line construction
CN104283162A (en) * 2014-10-27 2015-01-14 广西电网公司电力科学研究院 Distribution network overhead line high-altitude wiring clamp with deicing function
CN104283162B (en) * 2014-10-27 2017-01-25 广西电网公司电力科学研究院 Distribution network overhead line high-altitude wiring clamp with deicing function
CN105089487A (en) * 2015-09-07 2015-11-25 国网山东省电力公司烟台供电公司 Special portable power transmission line routing inspection rope ladder capable of being operated by single person
CN105625936A (en) * 2016-03-21 2016-06-01 国网甘肃省电力公司经济技术研究院 Portable climbing device
CN106848932A (en) * 2017-04-10 2017-06-13 国网辽宁省电力有限公司辽阳供电公司 One kind insulation is across line machine

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