CN105932602B - The method that three-phase conducting wire charges lifter and replaces insulator using the lifter - Google Patents

Abstract

The invention relates to the technical field of electric power construction, in particular to a live lifter for three-phase conductors in the straight section of a 10kV distribution network line, which includes a lifting plate, a supporting plate and two insulating plates, and the first ends of the two insulating plates are cross each other and the ends are separated respectively, the two ends of the supporting pull plate are respectively connected with the ends of the two insulating pull plates, the lifting pull plate and the two insulating pull plates are connected at the intersection of the two insulating pull plates, the Both the lower end of the lifting pull plate and the ends of the two insulating pull plates are provided with hanging wire hooks. The invention also provides a method for replacing an insulator by using the lifter. The lifter of the present invention has the characteristics of compact structure, convenient disassembly and assembly, can withstand large mechanical tension, and has a high safety factor. The lifter of the present invention is used to assist in the replacement of 10kV three-phase linear pole insulators or the operation of tower heightening and damaged linear poles. , easy to operate, conducive to improving work efficiency.

Description

Live lifter for three-phase conductors and method for replacing insulators using the lifter

technical field

The invention relates to the technical field of electric power construction, in particular to a live lifter for three-phase conductors in a straight section of a 10kV distribution network line and a method for replacing an insulator by using the lifter.

Background technique

Replacing three-phase pin insulators is a common operation in the technical field of electric power construction. Especially in areas with severe pollution, the distribution network line operation department needs to replace the three-phase pin insulators on the straight poles of the 10kV distribution network line to prevent the occurrence of line pollution flashover accidents. However, the existing replacement of three-phase pin insulators has the disadvantages of lengthy operation and low efficiency. The reason is that the replacement of three-phase pin insulators is generally carried out by using the traditional live working method, that is, replacing phase by phase , the specific operation method is: insulate and shield one phase, replace one phase, insulate and shield again, replace again, and so on. The time of repeated shielding accounts for 60%-70% of the entire operation time, which increases the labor intensity of the operators. Seriously affected the efficiency of live work.

In cities, especially in some old urban areas, due to problems left over from history, 10kV distribution network lines often have defects such as line aging, unreasonable erection, and low line insulation rate. In the urban-suburban junction, the power grid structure is relatively weak, and residents build houses illegally, resulting in insufficient distance between the line and the ground. It is necessary to raise the line tower with insufficient clearance distance to the house. In this case, the towers next to the traffic road are often hit by vehicles, causing damage to the towers. Serious damage to the towers will threaten the lives and property of the people around the line. Therefore, the damaged towers should be replaced in time. However, in the past, when the distance between the wire and the ground was not enough, the line tower with insufficient clearance distance to the house could only be raised when the line was powered off. In case of power outage, these traditional power construction methods need to interrupt the normal power supply to customers, and the operation is restricted, which greatly reduces the reliability of power supply.

In view of the defects of the existing working methods, it is necessary to develop a special tool, so as to perform relevant operations on the three-phase wires without interrupting the power supply.

Contents of the invention

In order to overcome the limitation in the prior art that the work needs to be powered off, and the defect of low work efficiency under live work, the present invention provides a live lifter for three-phase conductors in the straight section of a 10kV distribution network line, which can be used to assist live replacement The operation of 10kV three-phase straight pole pin insulators or tower heightened and damaged straight poles is easy to operate and conducive to improving work efficiency.

The present invention provides a 10kV distribution network line straight section three-phase wire live lifter, which includes a lifting pull plate, a supporting pull plate and two insulating pull plates. The first ends of the two insulating pull plates cross each other, and the ends are separated. The two ends of the supporting pull plate are respectively connected to the ends of the two insulating pull plates, the lifting pull plate is connected to the two insulating pull plates at the intersection of the two insulating pull plates, and the lower end of the lifting pull plate is connected to the two insulating pull plates. Each end of the insulation pull plate described in the block is provided with a hanging wire hook.

Further, there is a certain distance between the lower end of the lifting pull plate and the supporting pull plate, and the suspension hook arranged at the lower end of the lifting pull plate and the hanging wire hook arranged at the end of the insulating pull plate form a triangle.

Specifically, the head end of the insulating pull plate is provided with a through hole I, the end of the insulating pull plate is provided with a through hole II, and the lifting pull plate is provided with a connection hole I matching the through hole I, the A connection hole II matching the through hole II is opened on the support pull plate.

Specifically, the connection between the lifting pull plate and the two insulating pull plates is a bolt connection, and the connection between the supporting pull plate and the ends of the two insulating pull plates is a bolt connection; Bolts are used between the hanging wire hook, the insulating pull plate and the lifting pull plate.

Further, there are multiple connecting holes I on the lifting pull plate, and the relationship between the hanging wire hook on the lifting pulling plate and the hanging wire hook on the insulating pulling plate is adjusted by adjusting the matching relationship between the connecting hole I and the through hole I. distance between.

Further, there are multiple connection holes II on the supporting pull plate; there are multiple through holes II on the end of the insulating pull plate; by adjusting the matching relationship between the connection hole II and the through hole II, the two insulation The distance between the hanging wire hooks on the pull plate.

Preferably, the two insulating pull plates have the same structure.

Preferably, the lifting pull plate, the supporting pull plate and the insulating pull plate are all epoxy resin insulating plates.

Specifically, the upper end of the lifting pull plate is used to connect with the lifting device.

Correspondingly, the present invention also provides a method for replacing a 10kV three-phase linear rod pin insulator, comprising the following steps:

S1. Workers working with live distribution network wear insulating protective equipment, take the lifting device to reach the working position, cover the three-phase conductors of the 10kV distribution network line and the grounding part of the tower with electricity, and remove the pin insulator binding wire;

S2. Workers lively install the live lifter for the three-phase conductors of the straight section of the 10kV distribution network line described in claims 1-6, use the hanging wire hook at the lower end of the lifting plate to fix the middle conductor L2 of the three-phase conductors, and use the end of the insulating pull plate Fix the wires L1 and L3 on both sides of the wire L2 with the hanging wire hook, spread the wires L1 and L3 to both sides, and fix the upper end of the lifting pull plate on the lifting device;

S3. Operate the lifting device, lift the live lifter of the three-phase wires, and lift the three-phase wires of the 10kV distribution network line to a suitable height;

S4. The staff replaces the 10kV three-phase straight rod pin insulators, and removes the relevant shielding appliances after the work is completed.

The present invention has the following beneficial effects:

The live riser for the three-phase conductors in the straight section of the 10kV distribution network line provided by the present invention has the characteristics of compact structure, stable structure, high mechanical tension and high safety factor. The bolts are used to fix each part, which is convenient for the disassembly and installation of the lifter. Assembled, it has the advantages of convenient storage and small space occupation. The lifter of the present invention can be used for assisting live replacement of 10kV three-phase linear pole pin insulators or operation of tower heightening and damaged straight pole towers, and is easy to operate and conducive to improving work efficiency. It avoids the loss of power supply caused by power outages, improves the reliability of power supply, eliminates the shortage of distribution network lines, and becomes flexible in pole and line relocation and optimization and renovation projects.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained based on these drawings without creative work.

Fig. 1 is a schematic structural view of a live lifter for three-phase conductors in a straight line section of a 10kV distribution network according to the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to Fig. 1, the 10kV distribution network line straight section three-phase conductor electrified lifter provided by the present invention includes a lifting pull plate 4, a support pull plate 3 and two insulating pull plates 1 and 2, an insulating pull plate 1 and an insulating pull plate 2 The first ends of the two cross each other, and the ends are separately separated. The two ends of the supporting pull plate 3 are respectively connected to the ends of the two insulating pull plates 1 and 2, and the lifting pull plate 4 is connected to the two insulating pull plates 1 and 2. Specifically, it is connected at the intersection of two insulating pull plates. The upper end of the lifting pull plate 4 is used to connect with the lifting device. , The end of the insulating pull plate 2 is provided with a hanging wire hook 52 . There is a certain distance between the lower end of the lifting pull plate 4 and the supporting pull plate 3 , and the suspension wire hook 51 , the suspension wire hook 52 and the suspension wire hook 53 form a triangle. The lifting pull plate 4, the support pull plate 3 and the insulating pull plates 1 and 2 are all 3240 epoxy resin insulating pull plates.

The structure and size of the insulation pull plate 1 and the insulation pull plate 2 are the same, and the insulation pull plate 1 will be described below; the head end of the insulation pull plate 1 is provided with a through hole I, and the end is provided with a through hole II, and the through hole I and the through hole The number of holes II is plural. The lifting pull plate 4 is provided with a connecting hole I matching the through hole I, and the supporting pull plate 3 is provided with a connecting hole II matching the through hole II, and the connecting hole I and the connecting hole II The quantity is multiple.

The connection mode between the lifting pull plate 4 and the insulating pull plate 1 and the insulating pull plate 2, and the connection mode between the supporting pull plate 3 and the ends of the insulating pull plate 1 and the insulating pull plate 2 are all bolts connect. Taking the connection mode between the lifting pull plate 4 and the insulating pull plate 1 and the insulating pull plate 2 as an example, put the insulating pull plate 1, the insulating pull plate 2 and the lifting pull plate 4 together, so that the insulating pull plate The through hole I on the 1, the through hole I on the insulating pull plate 2 and the connecting hole I on the lifting pull plate 4 overlap, and then the bolt is passed through the overlapped hole, then the washer is put on, and the nut is tightened. The present invention uses a common Bolt connection mode, so the ends of the insulating pull plate 1 and the insulating pull plate 2 can move freely. Further, the support stay 3 is used to fix the distance between the end of the insulation stay 1 and the end of the insulation stay 2, and enhance the mechanical strength. Align and coincide with the through hole II of the insulated pull plate 1, and pass the bolt through the overlapped hole, then put the washer on, and tighten the nut; Pass the coincident hole, then place the washer and tighten the nut.

Since there are multiple through holes I provided on the insulating pull plate 1 and the insulating pull plate 2, there are also multiple connecting holes I on the lifting pull plate 4, so, by adjusting the alignment and overlapping relationship of the through hole I and the connecting hole I, Then the distance between the hanging wire hook 53 on the lifting pull plate and the hanging wire hook 51, 52 on the insulating pull plate can be changed. Similarly, since there are multiple connection holes II on the support pull plate 3; there are multiple through holes II provided at the ends of the insulation pull plate 1 and the insulation pull plate 2, then by adjusting the matching relationship between the connection hole II and the through hole II The distance between the hanging wire hook 53 on the lifting pull plate and the hanging wire hooks 51, 52 on the insulating pull plate, and the distance between the hanging wire hook 51 and the hanging wire hook 52 can also be changed.

Further, the connection between the suspension hooks 51 and 52 and the insulating pull plates 1 and 2 is also bolted, and the connection between the suspension hook 53 and the lifting pull plate 4 is also connected by bolts, so as to facilitate the storage and replacement of the suspension hooks.

The lifter of the present invention uses 3240 epoxy resin insulating pull plate as the main insulating material, and is processed and assembled into a triangular frame according to the actual size of the arrangement of the three-phase conductors of the straight rods of the 10kV distribution network line. connection; the three hanging wire hooks 51, 52, 53 are also connected with M12 bolts; the upper end of the lifting pull plate 4 is connected with the hook of the insulated bucket arm truck or the hook of the crane, and the three hanging wire hooks fix the three-phase wires. The hook of the insulated bucket arm truck or the hook of the crane generates traction, which can lift the three-phase wire lifter to achieve the purpose of lifting the three-phase wire.

The lifter provided by the present invention considers the largest wire JKLYJ-240 insulated wire that may be encountered from the straight section of the 10kV distribution network line, the vertical span is designed according to 200m, the vertical load is 7.2kN, the safety factor is 2.5, and the maximum lifting load is 18kN , 10kV distribution network line straight section three-phase conductor live riser chooses 3240 epoxy resin insulation pull plate as the main material, fully applies the characteristics of 3240 epoxy resin excellent insulation performance and high mechanical strength, 3240 epoxy resin plate 10×50 ×1300mm can withstand a maximum mechanical tension of 30kN, M12 connecting bolts can withstand a maximum mechanical tension of 30kN, the three suspension hooks used to fix the wires are selected with a rated mechanical load of 30kN, and the opening of the suspension hooks is C≦240, which fully guarantees the safety of live work .

The method for replacing a 10kV three-phase linear rod pin insulator by using the lifter of the present invention will be described below. The method includes the following steps:

S1. Workers working on live distribution network wear insulating protective equipment, take an insulated bucket arm truck to reach the working position, use wire shielding cover, insulating blanket and pole shielding cover to shield the three-phase conductors of the 10kV distribution network line and the grounding part of the pole tower, and dismantle them. Pin insulator binding wire;

S2. The staff install the lifter with electricity, use the hanging wire hook at the lower end of the lifting plate to fix the wire L2 in the middle of the three-phase wire, use the hanging wire hook at the end of the insulating pull plate to fix the wires L1 and L3 on both sides of the wire L2, and put the wire L1 and L3 are stretched to both sides, and the upper end of the lifting pull plate is fixed on the hook of the insulated bucket arm truck or the hook of the crane;

S3. Operate the insulated bucket arm truck or crane, lift the three-phase conductor live lifter, and lift the live three-phase conductor of the 10kV distribution network line to a suitable height;

S4. The staff replaces the 10kV three-phase straight rod pin insulators, and removes the relevant shielding appliances after the work is completed.

Certainly, the operation steps of the pole tower heightening operation or the linear pole tower replacement operation are consistent with the above steps S1-S3.

In the past, when increasing the height of a 10kV line straight pole tower or replacing a damaged straight pole tower, it was necessary to perform switching operations first, and the 10kV line was powered off, tested, and connected to the ground wire before the operation could be carried out. This would inevitably interrupt the normal power supply to customers and greatly reduce power supply reliability. When using the live riser of the three-phase wires in the straight section of the 10kV distribution network line of the present invention to increase the height of the straight pole tower of the 10kV line and replace the damaged straight pole tower, the charged body and the grounding body are firstly insulated and shielded, and then the charged three-phase wires are lifted as a whole After arriving at a suitable position, use the Dyneema rope instead of the steel wire rope to erect the tower. Under the condition of normal power supply of the 10kV line, the operation of tower heightening and damaged straight tower is carried out, which avoids the loss of power supply caused by power failure, improves the reliability of power supply, and improves level of equipment safety.

What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot limit the scope of rights of the present invention. Equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (6)

1. a 10kV distribution network line straight section three-phase lead electrified lifter, it is characterized in that, comprise lifting pull-plate (4), support pull-plate (3) and two insulation pull-plates, two described insulation pull-plates The head ends cross each other and the ends are separated respectively. The two ends of the supporting pull plate (3) are respectively connected to the ends of the two insulating pull plates, and the lifting pull plate (4) and the two insulating pull plates The intersection of the boards is connected, and the lower end of the lifting pull plate (4) and the ends of the two insulating pull plates are all provided with hanging wire hooks; the lower end of the lifting pull plate (4) and the supporting pull plate (3) There is a certain distance between them, and the hanging wire hook arranged at the lower end of the lifting pull plate (4) and the hanging wire hook arranged at the end of the insulating pull plate form a triangle; The head end of the insulating pull plate is provided with a through hole I, the end of the insulating pull plate is provided with a through hole II, and the lifting pull plate (4) is provided with a connection hole I matching the through hole I, the The supporting pull plate (3) is provided with a connection hole II matching the through hole II; There are multiple connecting holes I provided on the lifting pull plate (4), and the connection between the hanging wire hook on the lifting pulling plate and the hanging wire hook on the insulating pulling plate is adjusted by adjusting the matching relationship between the connecting hole I and the through hole I. the distance between There are multiple connection holes II on the supporting pull plate (3); there are multiple through holes II set at the end of the insulating pull plate; the two insulation holes are adjusted by adjusting the matching relationship between the connection hole II and the through hole II. The distance between the hanging wire hooks on the pull plate. 2. The 10kV distribution network line straight section three-phase live wire lifter according to claim 1, characterized in that, the connection mode between the lifting pull plate (4) and the two insulating pull plates is a bolt connection , The connection mode between the support pull plate (3) and the ends of the two insulating pull plates is bolt connection; the connection between the hanging wire hook, the insulation pull plate and the lifting pull plate is bolt connection. 3. The electrified riser for three-phase conductors in the straight section of a 10kV distribution network line according to claim 1 or 2, characterized in that the two insulating pull plates have the same structure. 4. The 10kV distribution network line straight section three-phase conductor electrified lifter according to claim 3, characterized in that, the lifting plate (4), the supporting plate (3) and the insulating plate are all epoxy resin Insulation board. 5. The electrified lifter for three-phase conductors in the straight section of 10kV distribution network line according to claim 3, characterized in that, the upper end of the lifting plate (4) is used to connect with the lifting device. 6. A method for replacing a 10kV three-phase linear rod pin insulator, characterized in that it comprises the following steps: S1. Workers working with live distribution network wear insulating protective equipment, take the lifting device to reach the working position, cover the three-phase conductors of the 10kV distribution network line and the grounding part of the tower with electricity, and remove the pin insulator binding wire; S2. Workers install the three-phase wire electrified riser for the straight section of the 10kV distribution network line described in any one of claims 1-5, and adjust the lifting puller by adjusting the matching relationship between the connection hole I and the through hole I The distance between the hanging wire hook on the top and the hanging wire hook on the insulating pull plate is adjusted by adjusting the matching relationship between the connection hole II and the through hole II to adjust the distance between the hanging wire hooks on the two insulating pull plates; use the lower end of the lifting pull plate Fix the wire L2 in the middle of the three-phase wires with the hanging wire hook, fix the wires L1 and L3 on both sides of the wire L2 with the wire hook at the end of the insulating pull plate, spread the wires L1 and L3 to both sides, and lift the The upper end is fixed on the lifting device; S3. Operate the lifting device, lift the live lifter of the three-phase wires, and lift the three-phase wires of the 10kV distribution network line to a suitable height; S4. The staff replaces the 10kV three-phase straight rod pin insulators, and removes the relevant shielding appliances after the work is completed.