CN115986626A

CN115986626A - Overhead line crossing gear lead spreading, bearing and protecting device and application method thereof

Info

Publication number: CN115986626A
Application number: CN202310156069.2A
Authority: CN
Inventors: 邓明亮; 刘晶; 汪盛; 祝勇; 魏巍; 杨凯; 罗顺辉
Original assignee: Hunan Power Transmission And Transformation Engineering Co ltd; State Grid Corp of China SGCC; State Grid Hunan Electric Power Co Ltd
Current assignee: Hunan Power Transmission And Transformation Engineering Co ltd; State Grid Corp of China SGCC; State Grid Hunan Electric Power Co Ltd
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-04-18

Abstract

The invention discloses an overhead line crossing gear wire spreading, bearing and protecting device and an application method thereof. During crossing construction, two sides of the upper end of a plurality of bearing protection devices are respectively hung between two sides of the upper end and the lower end of a carrier cable through wire clamps and are connected into a protection string which is completely covered above a crossed object through a positioning rope, and the protection string simultaneously forms a rectangular channel which is used as a spreading channel of a guide rope, a lead traction rope and a lead. Firstly, the bearing protection device is simple in structure and convenient to install. In the process of unfolding and placing, all ropes and wires are always positioned in the unfolding and placing channels of the protection strings, and if the ropes and the wires are broken or run, the falling ropes and the falling wires can be supported by the lower crosspiece of the unfolding and placing channels, so that the normal operation of the spanned objects cannot be influenced.

Description

Overhead line crossing gear lead spreading, bearing and protecting device and application method thereof

Technical Field

The invention belongs to the field of crossing construction of power transmission lines, and particularly relates to an overhead line crossing gear lead spreading, supporting and protecting device and an application method thereof.

Background

When objects to be spanned, such as power lines, roads, railways, navigation rivers and the like, exist below the overhead lines, in order to avoid the influence on the safe operation of the objects to be spanned caused by the falling of the conducting wires and the traction ropes thereof in the process of spreading and releasing the conducting wires, protective measures need to be taken for the conducting wires and the traction ropes thereof.

At present, the common protection measures include erecting scaffold type crossing frames, metal lattice type crossing frames, suspension cable type crossing frames and the like, the erecting of the crossing frames is high in cost and high in risk, and meanwhile, when an object to be spanned and the periphery of the object have power lines or other obstacles which cannot be powered off, the crossing frames cannot be erected. In addition, when the wire running or breaking occurs, the crossing frame is subjected to large impact force, and more resources are required to be invested to build a firmer crossing frame if the crossing frame is subjected to the impact.

Disclosure of Invention

The invention aims to provide a bearing protection device with low cost, simple and convenient operation and good protection effect and an application method thereof, which have the function of fully protecting a crossed object in the process of crossing construction of a lead of an overhead transmission line.

The invention provides a wire spreading, bearing and protecting device for an overhead line crossing gear, which comprises a plurality of rectangular frames which are vertically arranged in parallel, wherein two sides of the upper end of each rectangular frame are respectively suspended on a carrier cable through a wire clamp, the lower ends of two adjacent rectangular frames are fixedly connected through a positioning rope, and an upper crosspiece and a lower crosspiece of each rectangular frame can rotate.

In one embodiment of the above apparatus, the rectangular frame comprises an upper roller, a lower roller and a strap removably connected therebetween.

In one embodiment of the above device, the cylinder bodies of the upper roller and the lower roller are non-metal wear-resistant bodies, the upper connecting seats are symmetrically installed at two ends of the rotating shaft of the upper roller, and the lower connecting seats are symmetrically installed at two ends of the rotating shaft of the lower roller.

In one embodiment of the above apparatus, the upper roller has a diameter smaller than that of the lower roller.

In one embodiment of the device, the upper connecting base comprises a U-shaped base with an opening on the side and an upper connecting plate in the opening of the U-shaped base, the upper end of the upper connecting plate extends out of the upper end of the U-shaped base, a bolt is connected between the bottoms of two side plates of the U-shaped base, the bolt is matched with a locking nut, and the extending section of the upper connecting plate is provided with an upper connecting hole for installing the wire clamp.

In an implementation mode of the device, the lower connecting seat comprises a U-shaped seat with an opening at the side and a lower connecting plate welded to the lower end of the U-shaped seat, two ends of the lower connecting plate symmetrically extend out of two side plates of the U-shaped seat, the extending section is provided with a connecting hole for connecting the positioning rope, a connecting bolt is arranged between the tops of the two side plates of the U-shaped seat, and the bolt is matched with a locking nut.

In an embodiment of the above apparatus, two ends of the rotating shaft of the lower roller respectively penetrate through the U-shaped seat end plates of the lower connecting seat and are locked by nuts.

In one embodiment of the above-described apparatus, and two ends of the rotating shaft of the upper roller respectively penetrate through the U-shaped seat end plate of the upper connecting seat and the upper connecting plate and are locked through nuts.

In an embodiment of the above device, the sling is a flat rubber belt with an inner side provided with wear resistance, and two ends of the flat rubber belt are respectively hung on bolts connected with the upper connecting seat and the lower connecting seat.

The invention provides a method for spreading an overhead line crossing-gear lead by using the bearing protection device, which comprises the following steps:

(1) An operator hangs a five-wheel paying-off tackle on towers at two sides of a spanned object, and symmetrically hangs two-wheel tackles at two sides above the five-wheel paying-off tackle;

(2) Operating personnel on the towers at two sides and on the ground cooperate with the unmanned aerial vehicle to unfold, connect, pull and replace a first-level guide rope pulled by the unmanned aerial vehicle into a higher-strength-level guide rope in sequence, and finally replace the guide rope into a combined rope, so that the inner wheel groove and the outer wheel groove of the double-wheel pulley at the same side of the towers at two sides respectively penetrate through the combined rope;

the two combined cables in the two outer side wheel grooves comprise a traction side catenary, a traction side connector, a fixed-length catenary reinforcing section, a tension side connector and a tension side catenary which are connected in sequence, and the combined cables in the two inner side wheel grooves comprise a traction side adjusting rope, a traction side connector, a fixed-length adjusting rope, a tension side connector and a tension side adjusting rope which are connected in sequence;

in the process of replacing the composite cable, two sides of the upper end of each bearing protection device are suspended and fixed on two carrier cable reinforcing sections through wire clamps respectively in sequence, the lower ends of two adjacent bearing protection devices are connected through a fixed-length positioning rope, and the lower ends of the two bearing protection devices are connected and fixed with a connector through a connecting rope, so that a rectangular protection channel which is completely covered above a spanned object and used as a guide rope, a lead traction rope and a lead unfolding is formed;

(3) Carrying a primary guide rope by an unmanned aerial vehicle to fly over the five-wheel tackle, placing the primary guide rope in a middle wheel groove of the five-wheel paying-off tackle by operating personnel on a tower and on the ground, and gradually replacing the primary guide rope with a secondary Dyneema rope, a tertiary Dyneema rope and a speed 8230, and a wire traction rope;

(4) Adjusting the tension of the carrier cable and the adjusting rope to the allowable minimum tension, and semi-permanently fixing the ground falling ends at the two sides of the spanning rail;

(5) The tension of the carrier cable and the adjusting rope is adjusted to ensure that various ropes can pass through smoothly, the bearing protection device is paid attention to cover the spanned object, and the tension of the carrier cable and the adjusting rope is adjusted in the process of spreading and releasing the lead to ensure that the walking board can pass through the protection device smoothly;

(6) In the process of adjusting the conductor sag after the conductor is laid in place, the tension of the carrier cable and the tension of the adjusting rope are synchronously adjusted to be high or low, and the conductor is preferably not pressed down or supported by a supporting and protecting device.

(7) After the wire is subjected to secondary protection or wire hanging by pressure welding, the bearing protection device is detached according to the inverse operation during installation of the bearing protection device.

Each of the support guards of the present invention has a rectangular frame with upper and lower rails that are rotatable. During crossing construction, the two sides of the upper ends of the plurality of bearing protection devices are respectively hung on the carrier cables through the wire clamps and connected through the fixed-length positioning ropes between the lower ends of the two adjacent bearing protection devices, and the lower ends of the two bearing protection devices are connected and fixed with the connector through the connecting ropes, so that a rectangular protection channel which is completely covered above a crossed object and used as a guide rope, a wire traction rope and a wire unfolding is formed. Firstly, the bearing protection device has simple structure and convenient installation. In the process of unfolding and placing, all ropes and wires are always positioned in the rectangular protection channel in the process of unfolding and placing, and even if the ropes and the wires are broken or run, the fallen ropes and the fallen wires can still be supported by the lower crosspiece of the rectangular protection channel, so that the normal operation of a spanned object cannot be influenced. Because the carrier cable for hanging the bearing protection device has basically the same tension as the newly-unfolded lead, the impact force on the protection device is very small even if the wire is broken or broken, and the safe use of the protection device can be ensured. In addition, the invention adopts the rectangular protection channel made of the protection device to carry out the spreading and spanning construction, is not limited by field conditions, and has strong environmental adaptability. In short, the invention can fully play a role in protection in the process of crossing the conducting wire of the power transmission line, and the operation in the whole process is simple.

Drawings

Fig. 1 is a schematic structural view of a support and protection device according to an embodiment of the present invention.

Fig. 2 is a side view of fig. 1 with the clip installed.

Fig. 3 is a schematic view of the construction state of the present embodiment.

Fig. 4 to 6 are diagrams illustrating a replacement process of the guide rope in the construction process of the embodiment.

Numbers in fig. 1 and 2:

1-lower roller, 2-upper roller, 3-hanging belt, 4-lower connecting seat, 5-upper connecting seat, 6-wire clamp and 7-wear-resistant rubber flat belt.

Number in fig. 3:

11 is a spanned object, 12 is a traction side five-wheel paying-off tackle, 13 is a tension side five-wheel paying-off tackle,

14. 15 is a traction side double pulley, 16 and 17 are tension side double pulleys, 18 is a traction side carrier cable,

19 is a traction side connector, 20 is a fixed-length carrier cable reinforcing section, 21 is a tension side connector,

22 is a tension side carrier cable, 23 is a traction side carrier cable, 24 is a fixed-length carrier cable reinforcing section,

25 is a tension side carrier cable, 26 is a lead hauling rope, 27 is a hauling side adjusting rope,

28 is a fixed length adjusting rope, 29 is a tension side adjusting rope, 30 is a traction side adjusting rope,

31 is a fixed length adjusting rope, 32 is a tension side adjusting rope, 35 is a positioning rope between the supporting and protecting devices,

36 denotes a board and a lead before passing through the support guard, and 37 denotes a board and a lead after passing through the support guard.

Detailed Description

As shown in fig. 1 and fig. 2, the overhead line crossing wire spreading, supporting and protecting device disclosed in this embodiment mainly includes a lower roller 1, an upper roller 2 and a hanging strip 3.

The upper and lower parallel arrangement of lower cylinder 1 and upper cylinder 2 is as upper crosspiece and lower crosspiece respectively, and connecting seat 4 is down connected to the both ends symmetry of lower cylinder 1, and connecting seat 5 is connected to the both ends symmetry of upper cylinder 2.

The two hanging straps 3 are respectively connected between the lower connecting seat 4 and the upper connecting seat 5 at two sides and form a rectangular frame with the upper roller and the lower roller.

The diameter of the lower roller 1 is larger than that of the upper roller 2, and the wheel bodies of the two rollers are made of nonmetal wear-resistant materials.

The lower connecting seat 4 comprises a lower U-shaped seat 41 with an opening at the side and a lower connecting plate 42 welded to the lower end of the lower U-shaped seat, two ends of the lower connecting plate 42 symmetrically extend out of two side plates of the lower U-shaped seat 41, the extending sections are provided with connecting holes, bolts are connected between the tops of the two side plates of the lower U-shaped seat, and locking nuts are matched with the bolts.

The upper connecting seat 5 comprises an upper U-shaped seat 51 with a side opening and an upper connecting plate 52 welded in the opening of the upper U-shaped seat, and the upper end of the upper connecting plate 52 extends out of the upper end of the upper U-shaped seat 51. And a bolt is connected between the bottoms of the two side plates of the upper U-shaped seat 51, and the bolt is matched with a locking nut.

The extended section of the upper connecting plate 52 is provided with an upper connecting hole for mounting the wire clip 6.

Two ends of the rotating shaft of the lower roller 1 respectively penetrate through the end plates of the lower U-shaped seats 41 and then are locked through nuts, two ends of the rotating shaft of the upper roller 2 respectively penetrate through the end plates of the upper U-shaped seats 51 and the upper connecting plates 52 and then are locked through nuts, and meanwhile, elastic stop pins are arranged on the rotating shaft corresponding to the outer sides of the nuts to prevent the nuts from falling off after loosening.

The hanging strip 3 is a plate strip, two ends of the hanging strip are respectively hung on bolts connected with the lower connecting seat 4 and the upper connecting seat 5, and a wear-resistant rubber flat belt 7 is arranged on the inner side of the hanging strip.

The following describes in detail a specific process of simultaneously spreading a plurality of wires across a span of an overhead line with reference to fig. 3 to 6:

(1) Five-wheel paying-off

pulleys

12 and 13 and two-

wheel pulleys

14, 15, 16 and 17 are hung on towers on two sides of a spanned object 11.

(2) Adopt unmanned aerial vehicle to carry two one-level denyma ropes and fly over to

double round coaster

14 and 16 and 15 and 17 respectively, the operation personnel on by the shaft tower passes the outside race of

double round coaster

14 and 16 and 15 and 17 respectively with one-level denyma rope, cable A, cable B position promptly. The higher the grade of the enlightening nima rope is, the higher the strength is, the second grade is larger than the first grade, and the rest is analogized.

(3) The replacement process of the guide rope is as follows:

the first-level Dyneema ropes at the position of the cable A are respectively connected, pulled and replaced by a second-level Dyneema rope, then the two second-level Dyneema ropes are connected and pulled by the unfolded second-level Dyneema rope, one of the second-level Dyneema ropes is respectively arranged in the inner side wheel grooves of the double-wheel pulleys 15 and 17, namely the cable C is positioned, and the second-level Dyneema ropes are arranged in the inner side wheel grooves of the double-wheel pulleys 15 and 17. And connecting, drawing and replacing the two secondary Dyneema ropes into two tertiary Dyneema ropes, namely two tertiary Dyneema ropes after replacement is finished, and finally replacing the two tertiary Dyneema ropes into a rope A and a rope C respectively. As shown in fig. 4.

Referring to the above process, the first-level Dyneema rope at the position of the cable B is replaced by two third-level Dyneema ropes step by step, and finally replaced by the cable B and the cable D. As shown in fig. 5.

As shown in fig. 6, the unmanned aerial vehicle is adopted to carry one primary Dyneema rope to fly over the five-

wheel tackle

12 and 13, and operators on the tower place the Dyneema rope in the middle wheel grooves of the five-wheel pay-

off tackle

12 and 13 and gradually replace the Dyneema rope into a secondary Dyneema rope, a tertiary Dyneema rope, ...and a lead traction rope 26.

(4) The combined structure of the cable A, the cable B, the cable C and the cable D is as follows:

a cable A: the traction side catenary 18+ the traction side connector 19+ the fixed-length catenary reinforcement section 20+ the tension side connector 21+ the tension side catenary 22.

And (3) a cable B: the fixed-length catenary reinforcing section 24+ the tension-side connector 21+ the tension-side catenary 25 + the traction-side catenary 23+ the traction-side connector 19+ the catenary reinforcing section 25.

And C, a cable C: the traction side adjusting rope 27+ the traction side connector 19+ the fixed length adjusting rope 28+ the tension side connector + the tension side adjusting rope 29.

A cable D: the pulling-side adjusting rope 30+ the pulling-side connector 19+ the fixed-length adjusting rope 31+ the tension-side connector 21+ the tension-side adjusting rope 32.

The connectors may be conventional countersunk connector rings or shackles.

(5) In the process of replacing the rope A, the rope B, the rope C and the rope D, the upper ends of the bearing protection devices are suspended and fixed on the carrier

rope reinforcing sections

20 and 24 through the wire clamps 6 in sequence, and the lower ends of the bearing protection devices are connected in series through the middle positioning ropes 35 with fixed length and are connected with the

end connector connections

19 and 21 of the fixed

length adjusting ropes

28 and 31. When the bearing protection device is hung, the lead traction rope 26 is firstly placed in the first-level Dyneema rope of the five-wheel paying-

off tackle

12 and 13 and is placed in the bearing protection device. The hanging number of the protection device is determined according to the width of the spanned object 11, so that the spanned object 11 is within the protection range of the whole protection device.

(6) And adjusting the tension of the carrier cable and the adjusting rope to the allowable minimum tension, and performing semi-permanent fixation on the ground falling ends on the two sides of the crossing stop (the tension is not reduced in the construction process until the crossing construction is finished).

(7) The carrier cable and the tension of the adjusting rope are adjusted to ensure that various ropes can pass through smoothly, and the bearing and protecting device is noticed not to deviate from the spanned object. During the process of spreading the lead, attention is paid to adjusting the carrier cable and the tension of the adjusting rope, and the walking board can smoothly pass through the protection device.

(8) In the process of adjusting the conductor sag after the conductor is laid in place, the tension of the carrier cable and the tension of the adjusting rope are synchronously adjusted to be high or low, and the conductor is preferably not pressed down or supported by a supporting and protecting device.

(9) After the wire is subjected to secondary protection or wire hanging by pressure welding, the wire is removed according to the inverse procedure of the bearing protection device during installation.

Each of the support guards of the present invention has a rectangular frame with upper and lower rails that are rotatable. During crossing construction, the two sides of the upper ends of the plurality of bearing protection devices are respectively hung on the carrier cables through the wire clamps and connected through the fixed-length positioning ropes between the lower ends of the two adjacent bearing protection devices, and the lower ends of the two bearing protection devices are connected and fixed with the connector through the connecting ropes, so that a rectangular protection channel which is completely covered above a crossed object and used as a guide rope, a wire traction rope and a wire unfolding is formed. Firstly, the bearing protection device is simple in structure and convenient to install. In the process of unfolding and placing, all ropes and wires are always positioned in the rectangular protection channel in the process of unfolding and placing, and even if the ropes and the wires are broken or run, the fallen ropes and the fallen wires can still be supported by the lower crosspiece of the rectangular protection channel, so that the normal operation of a spanned object cannot be influenced. Because the carrier cable for hanging the bearing protection device has basically the same tension as the newly-unfolded lead, the impact force on the protection device is very small even if the wire is broken or broken, and the safe use of the protection device can be ensured. In addition, the invention adopts the rectangular protection channel made of the protection device to carry out the spreading and spanning construction, is not limited by field conditions, and has strong environmental adaptability. In short, the invention can fully play a role in protection in the process of crossing the conducting wire of the power transmission line, and the operation in the whole process is simple.

Claims

1. The utility model provides a bearing protection device is put in exhibition of grade wire is strideed across to overhead line which characterized in that: the device comprises a plurality of vertical rectangular frames which are arranged in parallel, wherein two sides of the upper end of each rectangular frame are respectively suspended on a carrier cable through wire clamps, the lower ends of two adjacent rectangular frames are fixedly connected through positioning ropes, and the upper crosspiece and the lower crosspiece of each rectangular frame can rotate.

2. The overhead line cross-over conductor spread, bolster and protector of claim 1 further characterized by: the rectangular frame comprises an upper roller, a lower roller and a hanging strip detachably connected between the upper roller and the lower roller.

3. The overhead line cross-over conductor spread, bolster and protector of claim 2 further characterized by: the cylinder body of upper roll and lower cylinder is nonmetal wear-resisting body, and the connecting seat is installed to the pivot both ends symmetry of upper roll, and the connecting seat is down installed to the pivot both ends symmetry of lower cylinder.

4. The overhead line span conductor spread bearer protection device of claim 3, wherein: the diameter of the upper roller is smaller than that of the lower roller.

5. The overhead line cross-over conductor exhibition bearing protection device of claim 3, characterized in that: the upper connecting seat comprises a U-shaped seat with an opening side and an upper connecting plate in the opening of the U-shaped seat, the upper end of the upper connecting plate extends out of the upper end of the U-shaped seat, a bolt is connected between the bottoms of two side plates of the U-shaped seat, the bolt is matched with a locking nut, and an extending section of the upper connecting plate is provided with an upper connecting hole for installing the wire clamp.

6. The overhead line cross-over conductor exhibition bearing protection device of claim 5, characterized in that: the lower connecting seat comprises a U-shaped seat with an opening at the side and a lower connecting plate welded to the lower end of the U-shaped seat, the two ends of the lower connecting plate symmetrically extend out of the two side plates of the U-shaped seat, the extending sections are provided with connecting holes for connecting the positioning ropes, connecting bolts are connected between the tops of the two side plates of the U-shaped seat, and locking nuts are matched with the bolts.

7. The overhead line cross-over conductor exhibition bearing protection device of claim 5, characterized in that: and two ends of a rotating shaft of the lower roller respectively penetrate through the U-shaped seat end plates of the lower connecting seat and are locked through nuts.

8. The overhead line span conductor spread bearer protection device of claim 6, wherein: and two ends of a rotating shaft of the upper roller respectively penetrate through the U-shaped seat end plate of the upper connecting seat and the upper connecting plate and are locked through nuts.

9. The overhead line span conductor spread bearer protection device of claim 6, wherein: the sling is a rubber flat belt with the inner side provided with wear resistance, and two ends of the sling are respectively hung on the bolt connected with the upper connecting seat and the lower connecting seat.

10. A method for spreading a wire of an overhead line crossing rail, wherein the protection device of any one of claims 1-9 is used in the construction process, and the method comprises the following steps:

(2) Operating personnel on the towers at two sides and on the ground cooperate with the unmanned aerial vehicle to unfold, sequentially connect, pull and replace a first-level guide rope pulled by the unmanned aerial vehicle into a higher-strength-level guide rope, and finally replace the guide rope into a combined rope, and respectively pass through a combined rope in inner and outer wheel grooves of the double-wheel tackle at the same side of the towers at two sides;

in the process of replacing the composite cables, two sides of the upper end of each bearing protection device are suspended and fixed on two carrier cable reinforcing sections through wire clamps respectively in sequence, the lower ends of two adjacent bearing protection devices are connected through a fixed-length positioning rope, and the lower ends of the two bearing protection devices are connected and fixed with a connector through a connecting rope, so that a rectangular protection channel which is completely covered above a spanned object and used as a guide rope, a lead traction rope and a lead unfolding is formed;

(6) In the process of adjusting the conductor relaxation after the conductor is laid in place, the tension of the carrier cable and the tension of the adjusting rope are synchronously increased or decreased, so that the conductor is not pressed down or a supporting and protecting device is supported.