CN201440584U - The device for replacing the insulator and accessories of the tension tower of the transmission line by the ground potential - Google Patents

Abstract

The utility model relates to a ground potential replacement device for tension tower insulators and accessories in the power transmission line, which comprises a fixed device and an insulating bar, wherein the fixed device is arranged on a tension tower, and the insulating bar is connected with the fixed device; and one end of the insulating bar is fixed on the tension tower, and the other end thereof is used for clamping and supporting a current lead so as to limit the position of the current lead. The clear space between cross arms can be up to more than 3 meters, thereby ensuring the safety distance of live working.

Description

The device for replacing the insulator and accessories of the tension tower of the transmission line by the ground potential

technical field

The utility model relates to a device for replacing an insulator and an accessory of a tension tower insulator of a transmission line by a ground potential.

Background technique

In recent years, the power grid has developed rapidly, substation outlets are crowded, and line corridors are narrow. More and more small-pitch multi-circuit towers will be used in line design. A large number of multi-circuit small-pitch tower designs will be used in 110kV transmission lines. For example, in a certain area Among the 110kV transmission lines under its jurisdiction, small-pitch multi-circuit towers have accounted for 5.23% of the total number of base towers; due to structural reasons, the distance between the two-story cross-arms is 3.5 meters due to the vertical arrangement of small-pitch multi-circuit towers on the 110kV line , resulting in live conductors located between the two layers of cross-arms, the electrician who performs live work cannot meet the safety distance requirements, and the combined gap is not enough when the personnel enter the potential with the help of tools such as insulating flat ladders and insulating soft ladders. Values, overheating of wire clips, and equipment defects and hidden dangers found during inspections cannot be resolved in a timely manner, and only by power outage maintenance can the work of eliminating defects be completed. Such economic loss and social benefit loss are quite huge. For example, in 2005, the 83# terminal tower (tower type 110DSn) of Yukuan Second Circuit 110kV Line 83# terminal tower (tower type is 110DSn) had severe heat generation in the parallel ditch wire clips of the A-phase drain line. The safe operation of the line must be dealt with quickly. If this work is handled as a power outage maintenance operation, the time converted into the power outage maintenance operation procedure (contact power outage, switching time, arranging safety measures and actual construction time) will take at least 6 hours, and the average The load is 24,000 kW, and 144,000 kWh is lost in 6 hours. This work is in accordance with the task of eliminating shortfalls in equipotential live work, and this alone can reduce the company's power loss by 144,000 kWh.

Therefore, there is a need for a method for conveniently and safely carrying out electrified operation.

Utility model content

In order to solve the above problems, the utility model provides a device for replacing the insulator and accessories of the tension tower of the transmission line with the ground potential, including: a fixing device, fixed on the tension tower, an insulating rod, connected with the fixing device, insulated One end of the rod is fixed on the strain tower, and the other end is used for clamping and supporting the drain wire, so as to limit the position of the drain wire.

Wherein, the fixing device is fixed on the strain tower by binding, splicing or using fasteners.

Wherein, the fixing device is a clamp including a first clamping portion and a second clamping portion.

Wherein, one end of the insulating rod is rotatably connected with respect to the fixing device.

Wherein, the other end of the insulating rod has a fixing portion extending in the transverse direction, and the fixing portion is provided with a locking portion matched with the drain wire.

Wherein, the device also includes a binding rope, which is used to further bind the insulating rod to the strain tower.

Wherein, the fixed part of the insulating rod limits the position of the drain wire to the outside of the corresponding cross-arm end of the strain tower.

Among them, the power transmission line is a 110kV power transmission line, and the relative vertical position of the insulating rod raises the drainage line to the outside by more than 70°.

The technical solution of the utility model has the following beneficial effects:

The device is made of fully insulating material, light in weight and easy to carry, convenient for field use of power transmission lines. 110kV small-pitch multi-circuit tension insulator strings, anti-vibration hammer and other related accessories can be replaced live. It has completely solved the problem that the 110kV small-pitch multiple vertically arranged towers cannot enter the hanging points of the cross-arm insulators of the strain towers, and carry out live work at the ground potential. It will effectively promote the progress of the current professional management level of power transmission, transform the work that originally required power outage maintenance into live maintenance, and take a key step towards condition-based maintenance. It also has the function of emergency repair, which improves the reliability of line operation and achieves the purpose of condition-based maintenance.

It should be noted that both the above description and the following detailed description are exemplary and are intended to provide further explanation of the claimed invention.

In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. Other purposes, features and effects of the present utility model will be further described in detail with reference to the drawings.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Figure 1 shows a schematic diagram of a device for arranging strain tower insulator strings and accessories for ground potential replacement of 110kV lines;

Figure 2 shows a plan view of an insulating rod;

Fig. 3 shows the view of the device for ground potential replacement of 110kV line vertically arranged tension tower insulator strings and accessories using the rotational displacement method.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Since the drain line of the strain tower conductor is located between the upper and lower cross-arms, the safety distance cannot meet the ground potential live work of the staff at the cross-arm, so it is necessary to try to change the position of the charged body here to facilitate live work.

The utility model provides a device for ground potential replacement of a phase (or lower phase) insulator string and accessories in a 110kV line tension tower. Fig. 1 shows a schematic diagram of a device for replacing a 110kV line with vertically arranged tension tower insulator strings and accessories by ground potential. As shown in the figure, the device according to the utility model includes: a fixing device 1, fixedly arranged on the tension tower, and an insulating rod 2, connected with the fixing device 1, one end of the insulating rod 2 is fixed on the tension tower, and the other end Used to clamp and support the drain wire to define the position of the drain wire. And one end of the insulating rod is rotatably connected with respect to the fixing device.

Wherein, the fixing device 1 can be bound or spliced on the strain tower, and can also be fixed on the strain tower by means of fasteners. Preferably, the fixing device 1 may be a clamp including a first clamping portion and a second clamping portion.

Figure 2 shows a plan view of an insulating rod. As shown in the figure, the insulating rod 2 includes a rod portion and a fixing portion 21 extending laterally, and the fixing portion 21 is provided with a locking portion 211 matching with the drain wire. Preferably, the locking part 211 can be implemented as two hooks arranged at both ends of the fixing part 21 .

Referring to Figure 1 again, to replace the middle phase (or lower phase) insulator of the strain tower, the staff needs to install the fixing device 1 at the broken end of the upper phase (or middle phase) cross-arm, and use the insulating rod 2 to clamp the drainage wire so that The insulating rod 2 is connected with the fixing device 1, and the worker uses the insulating rod 2 to push out the drain wire at the safe position of the cross arm, and rotates the insulating rod 2 to lift the drain wire to the outside by about 70°, as shown in Figure 3, so that the two The clear space between the cross-arms can reach more than 3m, which ensures the safe distance of live working. Then lock the insulating support rod 2 and the fixing device 1. Preferably, the insulating rod 2 can be bound to the strain tower, and then a safety shield is added. Workers enter the middle phase (or lower phase) cross-arm position to replace insulators, and the replacement method is the same as the conventional operation method.

The replacement of the tension insulation string on the uppermost cross-arm can be carried out according to the conventional operation method.

Using this method, when the insulator is a single string, there is one fixing device and the insulating rod; when the insulator is a double string, there are two fixing devices and the insulating rod.

The above are only the embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the scope of the claims of the present utility model.

Claims (8)

1. A device for replacing the strain tower insulator and accessories of the transmission line by the ground potential, characterized in that it comprises: The fixing device (1) is fixedly arranged on the tension tower, An insulating rod (2), connected to the fixing device (1), one end of the insulating rod is fixed on the strain tower, and the other end is used to clamp and support the drain wire, so as to limit the position of the drain wire . 2. The device according to claim 1, characterized in that, the fixing device (1) is fixed on the strain tower by binding, splicing or using fasteners. 3. The device according to claim 1, characterized in that the fixing device (1) is a clamp comprising a first clamping part and a second clamping part. 4. The device according to claim 1, characterized in that the one end of the insulating rod (2) is rotatably connected relative to the fixing device. 5. The device according to claim 4, characterized in that, the other end of the insulating rod (2) has a fixing portion (21) extending laterally, and the fixing portion is provided with a Matching snap parts (211). 6. The device according to claim 5, characterized in that the device further comprises a binding rope (3) for further binding the insulating rod (2) to the strain tower. 7. The device according to claim 5, characterized in that, the fixed part of the insulating rod (2) limits the position of the drain wire to the outside of the corresponding cross-arm end of the tension tower. 8 . The device according to claim 7 , wherein the power transmission line is a 110kV power transmission line, and the insulating rod raises the drain wire outward by more than 70° relative to the vertical position.

Images