CN102510029A - Ground potential electrified bar cutter device changing method - Google Patents

Abstract

The invention relates to a method for exchanging a rod knife device with electrified ground potential, which belongs to the field of overhead installation of electric wires or cables. It adopts the ground potential operation method, with the help of the rotating steering pole and the insulated lifting arm that can rotate 360 degrees, on the premise of ensuring the minimum safe distance for live work, it realizes the live exchange pole upper knife device, so as to reduce power failure time and improve maintenance. Work efficiency, improve the effective transmission time and online power supply rate of power supply lines, and improve the safety and reliability of power grid operation. It does not need insulated arm trucks or platforms during the operation, and is suitable for lines and work places that cannot be reached by live working vehicles. It adds live work items, expands the scope of work, effectively improves the planning of maintenance work, and reduces The operating workload has played a positive role in promoting and promoting the live work in the vast suburbs and rural areas. It can be widely used in the field of live overhaul and maintenance of power overhead lines.

Description

A method for exchanging rod knife device with ground potential electrification

technical field

The invention belongs to the field of overhead installation of electric wires or cables, and in particular relates to a live replacement/installation method for a rod knife device.

Background technique

On the power distribution line, the rod knife device is an electrical device that changes the operation mode of the power grid and controls the power flow of the system.

After a certain number of years of use, the rod knife device needs to be replaced to ensure the stable and reliable operation of the line.

In order to avoid power outages on the line, usually the power supply company uses live work as much as possible to replace the rod knife device.

At present, the operation method of exchanging the rod knife with electricity must rely on the insulated arm truck and use the intermediate potential operation method.

The aforementioned "intermediate potential operation method" refers to the method in which the human body is in the potential state between the grounded body and the charged body, and the insulated tool is used to indirectly contact the live equipment to achieve its maintenance purpose.

Intermediate potential work is the work that operators use insulating tools (ladders, platforms, cars) to insulate the earth and then use insulating tools to perform live work at close range. It is difficult to complete the operation with ground potential when the equipment is complex, and it is dangerous to use equipotential operation.

However, when the construction site for exchanging pole knives is located beside rivers and lakes, beside high-speed railways, next to elevated rail transit, near farmland and farms, and on the side of crowded and narrow roads, the insulated arm truck cannot stop, that is, the existing live working method cannot be used Carrying out work, exchanging rod knife will have to cut off the power to circuit.

Assuming that the pole-knife device is replaced during a power outage, at least two lines must be out of service each time. The average power outage for pole-knife replacement is at least 4 hours, which seriously affects the normal power consumption of power users and causes economic losses for both users and power companies.

When exchanging the above-mentioned rod knife device with construction environment restrictions, it is urgent to change the existing operation method and develop a new live replacement operation method.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for exchanging the rod knife device with ground potential charging, which can use the ground potential operation method in the environment where the insulating bucket truck and the crane cannot be used, and the line is not powered off. Realize the device of exchanging the pole knife with electricity, which makes up for the shortcoming that the overhead insulated bucket truck cannot reach the operation point to exchange the pole knife, adds a new live work item, expands the scope of work, effectively improves the planning of maintenance work, and reduces the number of operations. At the same time, it also improves the safety and reliability of the power grid operation, and plays a positive role in promoting and promoting the live work in the vast suburbs and rural areas.

The technical solution of the present invention is to provide a method for exchanging the rod knife device with electricity on the ground potential, including the cooperation between the operator on the pole and the operator on the ground to replace the rod knife device arranged on the pole, wherein the pole knife The device is located on the top of the pole, and the three-phase overhead line connected to it and its supporting crossarm are located on the pole below the pole knife device. Its characteristics are:

A. The pole operator uses the insulating operating rod to deactivate the arrester of the three-phase overhead line;

B. On the electric pole under the support cross-arm position, the climbing pole operator sets the first horizontal support cantilever in the direction of an angle of 90 degrees with the direction of the three-phase overhead line, and the first horizontal support cantilever is far away from the electric pole. One end of the end is provided with a fixed steering base;

C. The climbing pole operator sets the second horizontal support cantilever in the same direction above the horizontal cantilever support, and the second horizontal support cantilever is on the side near the pole and the first horizontal support cantilever is at the far end of the pole. Between the sides, a diagonal brace for strengthening the cantilever of the first lateral support is arranged;

D. The pole operator installs the insulation cover of the wire tension insulator and takes insulation and shielding measures;

E. Using the first horizontal support cantilever as a platform, the climbing pole operators use insulated tools to remove the pile head leads on both sides of the inner phase switch knife of the three-phase overhead line, and lower the pile head leads to the temporary fixing place of the same phase wire. fixed;

F. Using the first and second lateral support cantilever as a platform, the climbing pole operators use insulating tools to remove the pile head leads on both sides of the middle phase and the outer phase switch knife of the three-phase overhead line, and lower the pile head leads to the same phase. Fix the temporary fixing place of the wire;

G. The climbing pole operator installs a longitudinal support rod on the first and second lateral support cantilevers, and installs a steering pole and its insulating boom assembly on the upper part of the longitudinal support rod;

H. Ground operators install ground hoisting equipment;

I. The climbing rod operator and the ground operator cooperate to install the sling between the insulating boom assembly, the steering pole and the ground hoisting equipment;

J. The climbing pole operator boards the second lateral support cantilever, turns the insulating boom of the steering type pole to a suitable position above the pole knife device, and fixes and connects the sling to the pole knife device to be replaced;

K. The ground operators use the ground hoisting equipment to slightly tighten the sling that has been connected to the rod knife device to a state of tension;

L. The pole-climbing operator removes the fixing screws between the pole-knife device and the pole-knife bracket,

M. The ground operator and the climbing pole operator cooperate to lift the rod knife device to be replaced through the ground hoisting equipment, and the pole climbing operator turns the insulating boom of the steering pole to move the pole knife device to be replaced to outside the space area where the three-phase overhead line is located, and then lower it to the ground;

N. The ground operator removes the pole knife device to be replaced fixed at the end of the suspension rope, and fixes the new pole knife device at the end of the suspension rope;

O. Cooperate with ground operators and pole climbers, lift the new pole knife device to the plane where the position to be installed on the pole is located through the ground hoisting equipment;

P. The pole-climbing operator turns the insulating boom of the steering-type pole, and translates the new pole knife device to the position on the pole to be installed;

Q. The pole-climbing operator and the ground operator cooperate to slowly move the new pole-knife device to the pole-knife fixing bracket by loosening the sling;

R. The pole-climbing operator tightens the fixing screws between the pole-knife device and the pole-knife bracket, installs and fixes the new pole-knife device, pulls and closes the new pole-knife device in place for debugging, and checks that the switch knife contact is in compliance. requirements, and then place the lever knife device in the pull-off position;

S. The pole-climbing operator retreats to the first and second lateral support cantilevers, and starts to restore the connection between the pile head lead wires and the pole knife device on the outer phase, middle phase, and inner phase of the three-phase overhead line in sequence;

T. The pole-climbing workers cooperate to remove the components of the steering pole and the insulation cover of the relevant wire tension insulator, and remove the insulation and shielding measures on each phase line;

U. The pole operator uses the insulating operating rod to put the arrester of the three-phase overhead line into operation;

V. After the climbing pole operator lifts the insulating operator equipment to the ground, remove the steering pole and its insulating boom assembly, the second lateral support cantilever and the first lateral support cantilever in sequence, and return to the ground;

W. Ground operators dismantle the ground hoisting equipment;

X. Operators tidy up the ground work site, count the work tools, report to the on-duty dispatcher that the work is over, and evacuate the work site.

Wherein, the insulating boom assembly is located at the upper end of the steering-type grilling rod, and the longitudinal height of the insulating boom assembly is higher than the plane position where the rod knife device to be replaced is located.

The inner phase refers to one phase of the three-phase overhead lines that is close to the pole climbers, and the outer phase refers to the one phase of the three-phase overhead lines that is far away from the pole climbers.

The method described in the technical solution of this application adopts the ground potential operation method, and realizes the pole knife device on the live exchange pole under the premise of ensuring the minimum safe distance for live work with the help of the rotating steering pole and the insulating lifting arm that can rotate 360 degrees , to reduce power outage time, improve maintenance work efficiency, improve the effective transmission time and online power supply rate of power supply lines, and improve the safety and reliability of power grid operation.

Compared with prior art, the advantages of the present invention are:

1. When the line is not powered off, the ground potential operation method is used to realize the live exchange rod knife device, which can reduce the power outage time, effectively improve the efficiency of maintenance work, and improve the effective transmission time and online power supply rate of the power supply line;

2. The requirements for the workplace are small, and there is no need to use insulated bucket trucks or platforms during the operation, which is suitable for lines and workplaces that cannot be reached by live working vehicles;

3. Fewer operating tools and devices are required, and all of them can be disassembled/disassembled and manually carried/carried, which greatly reduces the workload of operation.

Description of drawings

Fig. 1 is a schematic block diagram of operation steps of the present invention;

Fig. 2 is a schematic structural view of the steering pole and its insulating boom assembly of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

In Fig. 1, the operation steps of the technical solution of the present application are provided, which at least include:

A. The pole operator uses the insulating operating rod to deactivate the arrester of the three-phase overhead line;

B. On the electric pole under the support cross-arm position, the climbing pole operator sets the first horizontal support cantilever in the direction of an angle of 90 degrees with the direction of the three-phase overhead line, and the first horizontal support cantilever is far away from the electric pole. One end of the end is provided with a fixed steering base;

C. The climbing pole operator sets the second horizontal support cantilever in the same direction above the horizontal cantilever support, and the second horizontal support cantilever is on the side near the pole and the first horizontal support cantilever is at the far end of the pole. Between the sides, a diagonal brace for strengthening the cantilever of the first lateral support is arranged;

D. The pole operator installs the insulation cover of the wire tension insulator and takes insulation and shielding measures;

E. Using the first horizontal support cantilever as a platform, the climbing pole operators use insulated tools to remove the pile head leads on both sides of the inner phase switch knife of the three-phase overhead line, and lower the pile head leads to the temporary fixing place of the same phase wire. fixed;

F. Using the first and second lateral support cantilever as a platform, the climbing pole operators use insulating tools to remove the pile head leads on both sides of the middle phase and the outer phase switch knife of the three-phase overhead line, and lower the pile head leads to the same phase. Fix the temporary fixing place of the wire;

G. The climbing pole operator installs a longitudinal support rod on the first and second lateral support cantilevers, and installs a steering pole and its insulating boom assembly on the upper part of the longitudinal support rod;

H. Ground operators install ground hoisting equipment;

I. The climbing rod operator and the ground operator cooperate to install the sling between the insulating boom assembly, the steering pole and the ground hoisting equipment;

J. The climbing pole operator boards the second lateral support cantilever, turns the insulating boom of the steering type pole to a suitable position above the pole knife device, and fixes and connects the sling to the pole knife device to be replaced;

K. The ground operators use the ground hoisting equipment to slightly tighten the sling that has been connected to the rod knife device to a state of tension;

L. The pole-climbing operator removes the fixing screws between the pole-knife device and the pole-knife bracket,

M. The ground operator and the climbing pole operator cooperate to lift the rod knife device to be replaced through the ground hoisting equipment, and the pole climbing operator turns the insulating boom of the steering pole to move the pole knife device to be replaced to outside the space area where the three-phase overhead line is located, and then lower it to the ground;

N. The ground operator removes the pole knife device to be replaced fixed at the end of the suspension rope, and fixes the new pole knife device at the end of the suspension rope;

O. Cooperate with ground operators and pole climbers, lift the new pole knife device to the plane where the position to be installed on the pole is located through the ground hoisting equipment;

P. The pole-climbing operator turns the insulating boom of the steering-type pole, and translates the new pole knife device to the position on the pole to be installed;

Q. The pole-climbing operator and the ground operator cooperate to slowly move the new pole-knife device to the pole-knife fixing bracket by loosening the sling;

R. The pole-climbing operator tightens the fixing screws between the pole-knife device and the pole-knife bracket, installs and fixes the new pole-knife device, pulls and closes the new pole-knife device in place for debugging, and checks that the switch knife contact is in compliance. requirements, and then place the lever knife device in the pull-off position;

S. The pole-climbing operator retreats to the first and second lateral support cantilevers, and starts to restore the connection between the pile head lead wires and the pole knife device on the outer phase, middle phase, and inner phase of the three-phase overhead line in sequence;

T. The pole-climbing workers cooperate to remove the components of the steering pole and the insulation cover of the relevant wire tension insulator, and remove the insulation and shielding measures on each phase line;

U. The pole operator uses the insulating operating rod to put the arrester of the three-phase overhead line into operation;

V. After the climbing pole operator lifts the insulating operator equipment to the ground, remove the steering pole and its insulating boom assembly, the second lateral support cantilever and the first lateral support cantilever in sequence, and return to the ground;

W. Ground operators dismantle the ground hoisting equipment;

X. Operators tidy up the ground work site, count the work tools, report to the on-duty dispatcher that the work is over, and evacuate the work site.

The inner phase refers to one phase of the three-phase overhead lines that is close to the pole climbers, and the outer phase refers to the one phase of the three-phase overhead lines that is far away from the pole climbers.

The insulating boom assembly is located at the upper end of the steering-type grilling rod, and the longitudinal height position of the insulating boom assembly is higher than the plane position where the rod knife device to be replaced is located.

The method of this technical solution includes the cooperation of the pole-climbing operator and the ground operator to replace the pole knife device arranged on the pole, wherein the pole knife device is located on the top of the pole, and the three-phase overhead line connected to it and its The supporting cross arm is located on the electric pole below the pole knife device.

The ground potential operation method refers to the method of using insulated tools to indirectly contact live equipment to achieve the purpose of maintenance when the human body is in the state of ground (zero) potential.

Its characteristic is that when the human body is at the ground potential, it does not occupy the space size of the live equipment to the ground.

Ground potential work method is a kind of indirect work method.

The development of this project can reduce power outage time, effectively improve the planning of maintenance work, and greatly reduce the workload of the operation team. A live operation can save a large number of operation steps of power supply operation equipment, and reduce the adjustment of operation mode, so that the loss of equipment is also reduced. It has been greatly reduced, and a successful operation of "replacing the pole knife with live electricity on both sides of the ground potential" can recover the power loss of about 4 hours. The promotion and application of this project will greatly expand the adaptability of live work, and bring great benefits to future maintenance and emergency repairs. Great benefit, improve the competitive advantage of the enterprise.

Economic benefits: If a successful operation of "replacing the rod knife with electricity on the ground potential" can recover the power loss of about 4 hours, the increased electricity sales for each operation is:

＝1.732×voltage×current×power factor×time×2

=1.732×10kV×200A×0.78×4×2

≈21615.36kW·H

If it is calculated at 0.6 yuan per kWh, it will increase the electricity fee income by at least 12969.22 yuan.

In addition, since this operation method does not need to use auxiliary vehicles during operation, the entire operation process has no energy consumption, reduced emissions, and no pollution. It has achieved a real green operation.

In Fig. 2, the structural diagram of the steering type grill bar and its insulating boom assembly involved in the method is given, wherein the device includes a rotating bracket, a boom 4, a first fixed pulley 1, a hook 3, and a rope 6 , the second fixed pulley 12, movable pulley 2.

Its rotating bracket is connected with high-voltage line tower or electric pole.

The boom 4 includes a free end and a fixed end. The fixed end of the boom 4 is connected with the bracket, and the fixed end is provided with a first fixed pulley 1; the fixed end of the boom 4 is provided with a second fixed pulley 12.

The rope 6 is sheathed in the first fixed pulley 1, the second fixed pulley 12, and the movable pulley 2 in sequence, and is fixed at the second fixed pulley 12.

The movable pulley 2 is provided with a suspension hook 3 .

The rotating bracket includes a second transverse support arm 8 , a first transverse support arm 9 , and a longitudinal support bar 11 .

One end of the second transverse support cantilever 8 is connected with a high-voltage line tower or an electric pole. The other end of the second transverse support arm 8 is connected to the longitudinal support rod 11 .

One end of the first transverse support cantilever 9 is connected to a high voltage line tower or pole; the other end of the first transverse support cantilever 9 is connected to a longitudinal support bar 11 .

The rotating bracket also includes a diagonal brace 10 .

One end of the diagonal brace 10 is connected with the second transverse support cantilever 8 , and the other end of the diagonal brace 10 is connected with the first transverse support cantilever rod 9 .

A step ladder 7 is provided on the rotating bracket.

The device is also provided with a boom fixed diagonal brace 5.

The boom 4 is fixed on the longitudinal support rod 11 through the boom fixing diagonal brace 5 .

After adopting the device with the above structure, because the boom can rotate 360 degrees on the longitudinal support rod (also commonly known as the pulling rod in the industry), and the boom, insulated ropes for live work and related accessories are all in line with the safety regulations for live work. Insulation requirements, with high insulation, to ensure the safety of live workers, and provide a guarantee for live work and safe operation.

In addition, the structure of the device ensures easy removal of parts, which facilitates easy installation at ground potential.

At the same time, the size of the 360-degree rotating insulating lifting arm ensures the minimum safe distance during live working.

The material and structural design of the 360-degree rotating insulated lifting arm ensure sufficient mechanical strength, allowing the operator to stand up and carry out the "turning over" operation and lift the boom knife device.

The rotation of the 360-degree rotating insulating lifting arm is operated by the person on the lower floor of the 360-degree rotating insulating lifting arm.

The lifting of the rod-knife device to be replaced or new is operated and controlled by the ground operator to ensure safe lifting at a uniform speed.

Since the present invention adopts the ground potential operation method to realize the live exchange rod knife device, it can reduce the power outage time, effectively improve the efficiency of maintenance work, improve the effective power transmission time and online power supply rate of the power supply line, and do not need to use the insulating arm truck during the operation process Or platform, suitable for lines and workplaces that live-line work vehicles cannot reach. New live-line work items have been added to expand the scope of work, effectively improve the planning of maintenance work, reduce the workload of operations, and also improve the reliability of power grid operation. The safety and reliability have played a positive role in promoting and promoting the live-line work in the vast suburbs and rural areas.

The invention can be widely used in the field of live overhaul and maintenance of electric power overhead lines.

Claims (4)

1. A method for exchanging a pole knife device with electrification at ground potential, comprising the cooperation of the pole operator and the ground operator to replace the pole knife device arranged on the pole, wherein the pole knife device is located at the top of the pole, The three-phase overhead line connected to it and its supporting cross-arm are located on the pole under the pole-cutter device, and its characteristics are: A. The pole operator uses the insulating operating rod to deactivate the arrester of the three-phase overhead line; B. On the electric pole under the support cross-arm position, the climbing pole operator sets the first horizontal support cantilever in the direction of an angle of 90 degrees with the direction of the three-phase overhead line, and the first horizontal support cantilever is far away from the electric pole. One end of the end is provided with a fixed steering base; C. The climbing pole operator sets the second horizontal support cantilever in the same direction above the horizontal cantilever support, and the second horizontal support cantilever is on the side near the pole and the first horizontal support cantilever is at the far end of the pole. Between the sides, a diagonal brace for strengthening the cantilever of the first lateral support is arranged; D. The pole operator installs the insulation cover of the wire tension insulator and takes insulation and shielding measures; E. Using the first horizontal support cantilever as a platform, the climbing pole operators use insulated tools to remove the pile head leads on both sides of the inner phase switch knife of the three-phase overhead line, and lower the pile head leads to the temporary fixing place of the same phase wire. fixed; F. Using the first and second lateral support cantilever as a platform, the climbing pole operators use insulating tools to remove the pile head leads on both sides of the middle phase and the outer phase switch knife of the three-phase overhead line, and lower the pile head leads to the same phase. Fix the temporary fixing place of the wire; G. The climbing pole operator installs a longitudinal support rod on the first and second lateral support cantilevers, and installs a steering pole and its insulating boom assembly on the upper part of the longitudinal support rod; H. Ground operators install ground hoisting equipment; I. The climbing rod operator and the ground operator cooperate to install the sling between the insulating boom assembly, the steering pole and the ground hoisting equipment; J. The climbing pole operator boards the second lateral support cantilever, turns the insulating boom of the steering type pole to a suitable position above the pole knife device, and fixes and connects the sling to the pole knife device to be replaced; K. The ground operators use the ground hoisting equipment to slightly tighten the sling that has been connected to the rod knife device to a state of tension; L. The pole-climbing operator removes the fixing screws between the pole-knife device and the pole-knife bracket, M. The ground operator and the climbing pole operator cooperate to lift the rod knife device to be replaced through the ground hoisting equipment, and the pole climbing operator turns the insulating boom of the steering pole to move the pole knife device to be replaced to outside the space area where the three-phase overhead line is located, and then lower it to the ground; N. The ground operator removes the pole knife device to be replaced fixed at the end of the suspension rope, and fixes the new pole knife device at the end of the suspension rope; O. Cooperate with ground operators and pole climbers, lift the new pole knife device to the plane where the position to be installed on the pole is located through the ground hoisting equipment; P. The pole-climbing operator turns the insulating boom of the steering-type pole, and translates the new pole knife device to the position on the pole to be installed; Q. The pole-climbing operator and the ground operator cooperate to slowly move the new pole-knife device to the pole-knife fixing bracket by loosening the sling; R. The pole-climbing operator tightens the fixing screws between the pole knife device and the pole knife bracket, installs and fixes the new pole knife device, pulls and closes the new pole knife device in place for debugging, and checks the contact of the gate knife Meet the requirements, then put the rod knife device in the pull-off position; S. The pole-climbing operator retreats to the first and second lateral support cantilevers, and starts to restore the connection between the pile head lead wires and the pole knife device on the outer phase, middle phase, and inner phase of the three-phase overhead line in sequence; T. The pole-climbing workers cooperate to remove the components of the steering pole and the insulation cover of the relevant wire tension insulator, and remove the insulation and shielding measures on each phase line; U. The pole operator uses the insulating operating rod to put the arrester of the three-phase overhead line into operation; V. After the climbing pole operator lifts the insulating operator equipment to the ground, remove the steering pole and its insulating boom assembly, the second lateral support cantilever and the first lateral support cantilever in sequence, and return to the ground; W. Ground operators dismantle the ground hoisting equipment; X. Operators tidy up the ground work site, count the work tools, report to the on-duty dispatcher that the work is over, and evacuate the work site. 2. The method according to claim 1, wherein the method for exchanging the rod-knife device with electricity on the ground potential is characterized in that the insulating boom assembly is located at the upper end of the steering-type pickling rod, and the longitudinal height position of the insulating boom assembly is high. At the plane position where the rod knife device to be replaced is located. 3. According to the method for exchanging the rod knife device with ground potential electrification according to claim 1, it is characterized in that said inner phase refers to a phase overhead line close to the pole operator in the three-phase overhead line, and said outer phase It refers to the one-phase overhead line that is far away from the climbing pole operators among the three-phase overhead lines. 4. According to the method for exchanging the rod knife device with ground potential charging according to claim 1, it is characterized in that the described method adopts the ground potential operation method, with the help of the rotary steering type pole and the insulating lifting arm that can rotate 360 degrees, in the Under the premise of ensuring the minimum safe distance for live-line work, realize the pole-upper knife device for live-line replacement, so as to reduce power outage time, improve maintenance work efficiency, improve the effective transmission time of power supply lines and online power supply rate, and improve the safety and reliability of power grid operation .

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