CN201118145Y

CN201118145Y - Powerline aerial spanning device

Info

Publication number: CN201118145Y
Application number: CNU200720044608XU
Authority: CN
Inventors: 周大清; 宫衍平; 杨贵友; 温生
Original assignee: Nanjing Power Supply Co of Jiangsu Electric Power Co
Current assignee: Nanjing Power Supply Co of Jiangsu Electric Power Co
Priority date: 2007-11-07
Filing date: 2007-11-07
Publication date: 2008-09-17
Anticipated expiration: 2017-11-07

Abstract

The utility model relates to an overhead crossing device of a power transmission line, and belongs to the technological field of electricity supply facilities. The overhead crossing device comprises a shell that is fundamentally shaped like the letter C; one end of the shell is provided with an extended connecting arm, and the middle part of the other end is provided with a locking handle through screw pairs; the shell is provided in the direction of the circle with at least one circle of rollers that adopt the outer diameter of a supporting wire as an inscribed circle. When in use, the connecting arms of a pair of overhead crossing devices are connected through a cable and are respectively clamped on the supporting wire on two sides of the overhead crossing bottom line that needs replacing and the locking handle is screwed for fixing; thus the overhead crossing structure that is required for bearing the falling bottom line can be formed. The overhead crossing device has the advantages of simple structure, convenient construction and strong adaptability, and can ensure the reliability of power supply.

Description

Transmission line is crossed over device in the air

Technical field

The utility model relates to a kind of transmission line and crosses over device in the air, belongs to the power supply facilities technical field.

Background technology

Along with the transmission line increase in operation age, the corrosion of overhead ground wire is serious day by day, safe operation in order to ensure circuit, the overhead ground wire broken string that is unlikely to take place because of corrosion causes line accident, usually need the combined circuit overhaul to change overhead ground wire, to eliminate the hidden danger that the broken string accident takes place because of the overhead ground wire of corrosion.In changing the process of overhead ground wire, often run into the problem such as stride of handing over again.There are railway, navigation channel, highway and friendship to stride power circuit or the like as the circuit below.This a series of friendship is striden to changing overhead ground wire and is brought many obstacles.

Understand according to the applicant, the leap scheme has following several when changing overhead ground wire at present:

1, set up crossing frame--as shown in Figure 1, mainly by crossed near the crossing frame 1 ' that makes up the thing 2 ' and be pulled in earth anchor 3 ' and crossing frame 1 ' between pull line 4 ', connecting rope 6 ' constitutes.Though set up simple to operately, the influence of being crossed over landform, crossing frame height when scaffolding height is difficult to more than 30 meters the time adopting, and also needs to have a power failure when setting up in the upper end and carries out, and the expense that whole leap took place is big.

2, chargedly set up the tipping cucurbit--as shown in Figure 2, wherein 1 " be lead, 2 " be insulation ropes, 3 " be the insulation arm-tie, 4 " be the overhead ground wire in changing, 5 " be cucurbit, 6 " crossed over thing.Usually thoroughly do away with the insulation arm-tie composition that edge nylon rope and has cucurbit with two, when setting up, hanging on the lead with the snatch block that connects the insulated nylon rope on the shaft tower, slide to crossover point, thoroughly do away with the edge nylon ropes with two and link the insulation arm-tie that has cucurbit and rise to lead and flush, firmly tighten up and get final product.Its advantage is not need to have a power failure, but work progress is comparatively loaded down with trivial details, wastes time and energy, and the bearing capacity of insulated nylon rope is limited, and certain risk is arranged during construction.In addition, to carry out multidisciplinary coordination during by highway, railway, strengthen difficulty of construction.

Also have the single-point crane to set up crossing frame and tensioner scheme in addition, the former shortcoming is to be subjected to landform and lead effect of altitude bigger temporarily, and the latter's shortcoming is the bad control of tension force.

The utility model content

The purpose of this utility model is: at the shortcoming that above prior art exists, propose a kind of be not subjected to the influence of topography, easy construction, can hot line job transmission line cross over device in the air.

In order to reach above purpose, transmission line of the present utility model is crossed over device in the air and is contained c-shaped substantially shell, described shell one end has the extension linking arm, set lever is equipped with by screw thread pair in other end middle part, and along the winding direction at least one circle being housed in the described shell is the roller bearing of inscribed circle to rely on wire diameter.

During use, the linking arm of a pair of aerial leap device is connected with cable, on the support lead that it is stuck in overhead ground wire to be replaced both sides, screwing set lever fixes, can form the required aerial construction that ground wire falls of bearing, it is simple in structure, easy construction, adaptability is strong, can guarantee power supply reliability.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the existing structural representation of setting up crossing frame.

Fig. 2 is the existing charged structural representation that sets up the tipping cucurbit.

Fig. 3 is the structural representation of an embodiment of the utility model.

Fig. 4 is the end view of Fig. 3.

Structural representation when Fig. 5 is Fig. 3 embodiment practical application.

Embodiment

Embodiment one

The transmission line of present embodiment is crossed over device in the air as shown in Figure 3 and Figure 4, substantially c-shaped shell 1-3 one end has the extension linking arm, set lever 1-1 is equipped with by screw thread pair in other end middle part, be supported with two circle roller bearing 1-2 side by side by the support of bearing 1-4 at two ends separately respectively along the winding direction in this shell, every circle roller bearing has five, and its inscribe diameter of a circle equals to rely on wire diameter substantially.Be welded with suspension ring 5 outside opening one side relatively on the shell.

During use, this aerial device of crossing over is enclosed within on the support lead, roller bearing is screwed the handle fixed position again along relying on lead to slide to the appropriate location that need cross over.The effect of suspension ring is, and is long when the width of being crossed over thing, need use severally to aerial leap device, can link together with the insulation rope by certain distance by suspension ring, with increase leap degree.

The practical application of present embodiment is as shown in Figure 5: utilize original two leads 1 for relying on, length equals two GJ-50 steel strand wire 5 two ends that rely on separations substantially, is connected by the linking arm of rotary connector 2 with a pair of aerial leap device 4 respectively.During construction, the staff takes advantage of driving lower wire (general every staff's weight is less than 1000N, and lead can bear this weight fully) respectively.Can be fixed under near the overhead ground wire to be replaced 3 of being crossed over thing 6 tops crossing over device 4 in the air by screwing set lever, compared broad if cross over the width of thing, can be according to field condition, use severally to aerial leap device more, link together with the insulation rope by certain distance.Like this, when the overhead ground wire 3 that is replaced falls, just in time ride on the aerial in pairs steel strand wire of crossing between the device 4, hand over the safety of striding thing below having guaranteed.

Facts have proved that present embodiment has the following advantages:

1, be not subjected to landform, the influence of building, structures can be constructed flexibly;

But 2, light combination in any, bearing capacity is strong, has significantly increased safety of construction;

3, required manpower is few, and is consuming time few, reduced the engineering spending, and improved power supply reliability;

4, practical, can be applied in the middle of the engineering of various replacing overhead ground wires and transmission line.

In addition to the implementation, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.

Claims

1, a kind of transmission line is crossed over device in the air, it is characterized in that: contain c-shaped substantially shell, described shell one end has the extension linking arm, set lever is equipped with by screw thread pair in other end middle part, and along the winding direction at least one circle being housed in the described shell is the roller bearing of inscribed circle to rely on wire diameter.

2, cross over device in the air according to the described transmission line of claim 1, it is characterized in that: pass through the support of bearing support roller at two ends separately respectively along the winding direction in the described shell.

3, cross over device in the air according to the described transmission line of claim 2, it is characterized in that: roller two figure in the described shell side by side, every circle roller bearing has five, its inscribe diameter of a circle equals to rely on wire diameter substantially.

4, cross over device in the air according to the described transmission line of claim 3, it is characterized in that: be welded with suspension ring outside opening one side relatively on the described shell.

5, cross over device in the air according to the described transmission line of claim 4, it is characterized in that: the linking arm of described shell is connected with an end of cable by rotary connector.