CN206461292U - The adapter of charged for replacement ± 800kV DC power transmission line L insulator strings - Google Patents

Abstract

The utility model discloses an adapter card for replacing L-string insulators of ±800kV direct current transmission lines with electricity, which is used for connecting back-to-back angle steel and tightening wire rods on transmission towers. Both the lower hanging plate and the lower hanging plate are integral parts, including an angle steel connecting section, a U-shaped section and a tightening screw rod connecting section arranged in sequence, and the upper and lower hanging plates are detachably connected as a whole through the angle steel connecting section. When in use, arrange the upper hanging plate and the lower hanging plate so that the U-shaped section is stuck on one side of the back-to-back angle steel, and the angle steel connecting section fits the other side of the angle steel, and then replace the existing ones such as the tightening wire rod The tools of the insulator are connected to the connecting section of the tight-wire screw rod of the upper and lower hanging plates. After the connection is fixed, the existing tools such as insulating pull rods and big knife cards can be used to realize the live replacement of the L-string insulators in this direction without other The new device realizes the universality of existing tools for live replacement of insulators.

Description

Adapter card for live replacement of L-string insulators of ±800kV DC transmission line

technical field

The utility model relates to a jig used for live replacement of insulators, in particular to an adapter card for live replacement of L-series insulators of ±800kV DC transmission lines.

Background technique

With the development of UHV lines, L-string insulators are widely used in small corner towers. The operating insulator not only bears the effect of working voltage for a long time, but also is affected by overvoltage such as operation and lightning, and the weight of the wire, wind, ice and snow, and the insulator is affected by attached dirt and external force damage. The insulators will be damaged, affecting the safe operation of the line. Once the UHV power grid is put into operation, it will be difficult to stop running. In order to improve the reliability of power supply, insulators that do not meet the operating requirements need to be replaced in time.

At present, only the live replacement of L-string insulators on EHV transmission lines has been studied in China, and corresponding tools have been developed. However, due to the greater load on the wires of the ±800kV UHV DC transmission line, the requirements for the mechanical strength of the tools are higher, and the structure of the side hanging point of the L series insulator on the UHV transmission line is different from that of the EHV transmission line. Live replacement tools for transmission lines are not suitable for live replacement of L-string insulators on ±800kV DC transmission lines. At present, there is no device on the market that can make the EHV transmission line insulator replacement tool common to the ±800kV UHV DC transmission line L-string composite insulator replacement tool.

Utility model content

The purpose of the utility model is to provide an adapter card for live replacement of L-string insulators of ±800kV direct current transmission line, which can be used universally by tools.

The adapter card provided by the utility model for replacing the L-string insulators of the ±800kV direct current transmission line is used to connect the upper back-to-back angle steel and the tightening wire rod of the transmission tower. The upper and lower hanging plates are all integral parts, including angle steel connecting section, U-shaped section and tightening screw connecting section arranged in sequence. The upper and lower hanging plates are detachably connected as a whole through the angle steel connecting section, so that the U-shaped section covers On one side of the back-to-back angle steel, the angle steel connection section of the upper and lower hanging plates is attached to the other side of the back-to-back angle steel.

In order to ensure the reliability of fastening with the angle steel, the angle steel connection section is perpendicular to the U-shaped section, and the outer ends of the angle steel connection section are provided with connection holes, and the upper and lower hanging plates are connected as a whole through corresponding bolts and nuts.

In order to improve the connection reliability of the tightening screw rod, the connecting section of the tightening screw rod is obliquely connected to the U-shaped section, and the outer ends of the connecting section of the tightening screw rod are provided with connections for connecting the tightening screw rod. hole.

In order to further ensure reliable connection with the tightening screw rod, the connecting sections of the tightening screw rod of the upper hanging plate and the lower hanging plate are parallel to each other.

Preferably, the heights of the two side walls of the U-shaped section of the lower hanging plate are different, and the height of the side close to the connecting section of the tightening screw rod is relatively low.

When the utility model is in use, the upper hanging plate and the lower hanging plate are relatively arranged, and its U-shaped section is stuck on one side of the back-to-back angle steel, and the angle steel connecting section is connected with the other side of the angle steel as a whole, and then the tight The existing tools for replacing insulators such as wire rods are connected to the connecting section of the tightening wire rods of the upper and lower hanging plates. After the connection is fixed, the existing tools such as insulating pull rods and large knife cards can be used to realize the L string in this direction. The live replacement of insulators does not require new devices, so that the existing tools for live replacement of insulators can be applied to the live replacement of L-string insulators of ±800kV DC transmission lines.

Description of drawings

Fig. 1 is a schematic layout diagram of a preferred embodiment of the present invention.

Graphic serial number:

1—upper hanging plate, 2—lower hanging plate, 3—upper angle steel, 4—lower angle steel, 5—bolt, 6—nut,

11—angle steel connecting section Ⅰ, 12—U-shaped section Ⅰ, 13—tightening screw connecting section Ⅰ, 21—angle steel connecting section Ⅱ, 22—U-shaped section Ⅱ, 23—tightening screw connecting section Ⅱ,

detailed description

As shown in Figure 1, the adapter card for live replacement of the L-string insulators of the ±800kV DC transmission line provided by this embodiment includes an upper hanging plate 1 and a lower hanging plate 2 arranged oppositely, and the upper hanging plate is an integral part, including The angle steel connecting section Ⅰ11, U-shaped section Ⅰ12 and tightening screw connecting section Ⅰ13 are arranged in sequence. The opening width of the U-shaped section matches the side thickness of one side of the upper angle steel 3. The heights of the two side walls of the U-shaped section Ⅰ are basically the same, and the angle steel The connecting section Ⅰ is perpendicular to the U-shaped section Ⅰ, and the outer end of the angle steel connecting section Ⅰ is provided with a connecting hole. It is used to connect the connecting hole of the tightening screw rod. The lower hanging plate is also an integral part, including angle steel connecting section II21, U-shaped section II22 and tightening screw connecting section II23 arranged in sequence. The height of the two side walls of II is different, and the height of the side close to the tightening screw rod connecting section II is lower. The angle steel connecting section II is perpendicular to the U-shaped section II, and the outer end of the angle steel connecting section II is provided with a connecting hole. The tightening screw rod The connecting section II is obliquely connected to the U-shaped section II, and the outer end of the connecting section II of the tightening screw rod is provided with a connecting hole for connecting the tightening screw rod. The connecting section II of the tightening screw rod is parallel to the connecting section I of the tightening screw rod. The upper and lower hanging plates are integrated with the upper angle steel and the lower angle steel arranged back to back through corresponding bolts 5 and nuts 6 to ensure the reliability of the connection and fastening.

The method for live replacement of L-string composite insulators using this embodiment is as follows: first, the operators on the tower climb to the appropriate position of the cross arm, and the ground operators pass the upper and lower hanging plates to the tower; Place the upper hanging plate and the lower hanging plate under the lower angle steel on the upper angle steel of the back-to-back arrangement of the side hanging points of the L string cross arm, and connect and fasten them through bolts and nuts; then connect the upper hanging plate and the lower hanging plate with the tight wire The rods are connected and fixed by bolts; finally, the existing tools such as insulating pull rods and big knife cards can be used together to realize live replacement of L string insulators in one direction. It can be seen that the application of this implementation does not require new tools, and the existing tools for live replacement of insulators can be applied to the live replacement of L-series insulators of ±800kV DC transmission lines, and are not limited by the direction and size of L-series composite insulators, and have good versatility .

Claims (5)

1. An adapter card for replacing L-string insulators of ±800kV direct current transmission line with electricity, which is used to connect back-to-back angle steel and tight wire rods on the transmission tower, and is characterized in that it includes an upper hanging plate and a lower hanging plate arranged oppositely, The upper and lower hanging plates are integral parts, including angle steel connecting section, U-shaped section and tightening screw connecting section arranged in sequence. The upper and lower hanging plates are detachably connected as a whole through the angle steel connecting section, so that the U-shaped section includes One side of the back-to-back angle steel is covered, and the angle steel connecting section of the upper and lower hanging plates is attached to the other side of the back-to-back angle steel. 2. The adapter card for live replacement of L-string insulators of ±800kV DC transmission line according to claim 1, characterized in that: the angle steel connecting section is perpendicular to the U-shaped section, and the outer ends of the angle steel connecting section are provided with connecting holes , the upper and lower hanging plates are connected as a whole through corresponding bolts and nuts. 3. The adapter card for live replacement of L-string insulators of ±800kV DC transmission line according to claim 1, characterized in that: the connecting section of the tightening screw rod is obliquely connected to the U-shaped section, and the tightening screw rod The outer ends of the connecting sections are all provided with connecting holes for connecting the tightening screw rods. 4. The adapter card for live replacement of L-string insulators of ±800kV DC transmission line according to claim 3, characterized in that: the connection sections of the tightening screw rods of the upper hanging plate and the lower hanging plate are parallel to each other. 5. The adapter card for live replacement of L-string insulators of ±800kV DC transmission line according to claim 4, characterized in that: the two side walls of the U-shaped section of the lower hanging plate have different heights and are connected close to the tightening wire rod The height on one side of the segment is lower.