CN114823011A - A zero-value insulator anti-lightning and anti-pollution flashover device - Google Patents

Abstract

The invention provides a zero-value insulator lightning protection antifouling flash string device, which comprises: two fixing pieces; the short connecting piece is arranged between the two fixing pieces, and two ends of the short connecting piece are connected with the two fixing pieces respectively. The fixing piece is sleeved and clamped on the zero-value insulator steel cap to fix the device, so that the device is fixed to the zero-value insulator of the insulator string and provides a supporting position for the short connecting piece; the zero-value insulator is connected in parallel to form a discharge channel by short circuit, current flows, and then the insulator string is prevented from being broken due to high current generated by lightning stroke or other reasons, the mechanical strength of the zero-value insulator can be greatly reduced and further damaged, the mechanical strength of the insulator is effectively maintained, the zero-value insulator string breakage accident is prevented in advance, the replacement period is prolonged, and the lightning-proof and anti-pollution flashover string breakage of the zero-value insulator of the high-voltage line is realized.

Description

A zero-value insulator anti-lightning and anti-pollution flashover device

technical field

The invention relates to the technical field of high-voltage transmission line devices, in particular to a zero-value insulator anti-lightning and anti-pollution flashover string breaking device.

Background technique

Disk suspension porcelain insulators are widely used in power systems. They are widely installed and applied on substations, converter station structures, and transmission line towers, and their porcelain parts will continue to be impacted by various complex working conditions during operation, such as: Strong electric field, mechanical stress, alternation of cold and heat, intrusion of moisture. As shown in Figure 1, these complex working conditions will lead to the reduction of the insulation resistance of the head of the porcelain insulator to form a zero-value insulator. Once the insulator string is struck by lightning or flashover caused by other reasons, the head resistance is extremely small and the discharge distance along the umbrella plate is relatively short. The long resistance is relatively large. When the head defect is discharged, it becomes a discharge channel and the discharge path along the umbrella disk is far away. Therefore, most of the energy is discharged from the discharge channel of the head of the porcelain insulator, and the heat generated when the arc passes through the head of the insulator. Make the insulator explode, resulting in broken strings.

SUMMARY OF THE INVENTION

In view of this, the present invention proposes a zero-value insulator anti-lightning strike and anti-pollution flashover string breaking device, which aims to solve the problem of the existing zero-value insulator string breaking accident.

The invention provides a zero-value insulator anti-lightning strike and anti-pollution flashover string disconnection device. The zero-value insulator anti-lightning strike and anti-pollution flashover string disconnection device includes: two fixing parts, which are respectively sleeved and clamped in the zero-value insulator. On the two steel feet on both sides of the insulator, or, for the two steel caps on both sides of the zero value insulator, or, for the two steel caps on both sides of the zero value insulator, or, for the two steel caps on both sides of the zero value insulator. On the steel foot and the steel cap; the shorting piece is arranged between the two fixing pieces, and the two ends of the shorting piece are respectively connected with the two fixing pieces for parallel connection to the zero-value insulator The above is to short-circuit the zero-value insulators to form a discharge channel and flow current, thereby realizing the zero-value insulators to prevent lightning strikes and anti-pollution flashovers.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover device, the fixing member is a hoop-type structure or a tie-type structure.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover device, the cable tie structure is a conductive cable tie structure.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover device, the conductive cable tie structure is a cable tie structure made of brass or red copper.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover string breaking device, the tie-type structure is provided with a ratchet-type tie-buckle or a loose buckle, which is used to realize self-locking and adjustment of the tie-tie-type structure.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover device, the fixing member includes: a first bending belt; a second bending belt, the second bending belt and the first bending belt There is an included angle between them, and the second bending belt and the first bending belt are used to fit on the two wall surfaces at the protruding position of the lower edge of the steel cap respectively, so as to realize the connection between the fixing piece and the steel cap. The positioning between the steel caps is described.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover device, the shorting piece is a solid copper wire or a braided copper wire.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover device, the short-connecting member is a braided soft copper wire made of brass or red copper.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover device, the two ends of the shorting piece are respectively connected to the two fixing pieces by welding.

Further, in the above-mentioned zero-value insulator anti-lightning and anti-pollution flashover device, both ends of the shorting piece are provided with socket rings, and the two socket rings are respectively rotatably and slidably connected to the two sockets. on the fixture.

The zero-value insulator anti-lightning and anti-pollution flashover string disconnection device provided by the present invention is used to sleeve and clamp the two steel feet on both sides of the zero-value insulator through two fixing parts, or, the two fixing parts are used for On the two steel caps that are respectively sleeved and clamped on both sides of the zero-value insulator, or two fasteners are used to be sleeved and clamped respectively on the steel feet and steel caps on both sides of the zero-value insulator, so as to realize the The fixing of the device enables the device to be fixed on the zero-value insulator of the insulator string, and provides a support position for the short-circuit piece; by connecting the zero-value insulator in parallel to short-circuit the zero-value insulator, a discharge channel is formed, and current flows, thereby preventing The insulator string is broken due to lightning strike or high current generated by other reasons, which can effectively maintain the mechanical strength of the insulator and prolong the replacement cycle. The structure is simple and reliable, and the assembly is convenient, which can reduce the operation and maintenance cost of high-voltage lines. After the device is installed on the insulator string, once the insulator string suffers a flashover caused by lightning strike or other reasons, the device will be used as an external protection device to form a discharge channel, which can greatly reduce the further damage to the mechanical strength of the zero-value insulator. The high-value insulator breakage accident is prevented in advance, the replacement cycle is extended, and the assembly is convenient and the cost is low, which can reduce the cost of line operation and maintenance, and realize the zero-value insulator for high-voltage lines.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

Figure 1 is a schematic structural diagram of the head defect of a zero-value insulator;

FIG. 2 is a schematic structural diagram of the use state of the device with zero-value insulators for preventing lightning strikes and anti-pollution flashovers according to an embodiment of the present invention;

FIG. 3 is a partial enlarged view of a fixing member provided in an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Referring to FIG. 2 , it is a schematic structural diagram of a zero-value insulator anti-lightning strike and anti-pollution flashover string disconnection device provided in an embodiment of the present invention. As shown in the figure, the device includes: two fixing parts 1 and one shorting part 2; wherein,

The shorting piece 2 is arranged between the two fixing pieces 1, and the two ends of the shorting piece 2 are respectively connected with the two fixing pieces 1, and the two fixing pieces 1 are respectively sleeved and clamped on the zero-value insulator. 3 on the two steel feet on both sides, or, the two fixing pieces 1 are used to be respectively sleeved and clamped on the two steel caps on both sides of the zero-value insulator 3, or the two fixing pieces 1 are used to be respectively sleeved And it is clamped on the steel feet and steel caps on both sides of the zero-value insulator 3; the shorting piece 2 is used to connect the zero-value insulator in parallel to short-circuit the zero-value insulator 3 to form a discharge channel and flow current, thereby preventing the insulator string The broken string occurs due to the large current generated by lightning strike or other reasons, which can effectively maintain the mechanical strength of the insulator, realize the insulator anti-lightning and anti-pollution flashover, and prolong the replacement cycle. The structure is simple and reliable, and the assembly is convenient. Line operation and maintenance costs. Specifically, in this embodiment, the two fixing parts 1 are used to be respectively sleeved and clamped on the two steel caps 4 on both sides of the zero-value insulator 3 for illustration. Of course, the fixing parts 1 can also be sleeved. It is set and fixed in other positions, for example, in a groove or on a protrusion, which is not limited in this embodiment, so as to realize the connection between the device and the insulator, and to realize the fixing of the shorting member 2 . Both ends of the shorting piece 2 can be welded to the two fixing pieces 1 respectively, so as to reduce unnecessary installation steps while ensuring the connection strength, the structure is simple and easy to install; It is slidably connected to the fixing member 1 to adjust the position; of course, both ends of the shorting member 2 can be provided with sleeve rings, which can be slidably and rotatably sleeved on the fixing member 1 to realize shorting The position and setting angle of part 2 can be adjusted according to the actual situation.

In this embodiment, the fixing member 1 can be in various forms. Preferably, the fixing member 1 can be of a hoop type, a cable tie type, etc., or a structural member whose two ends are detachably connected and surrounded to form a ring. In order to adapt to disc-shaped suspension porcelain insulators of different sizes; of course, the fixing member 1 can also be of other structures, which is not limited in this embodiment; further preferably, the fixing member 1 can be a brass or red copper wire tie The structure, of course, can also be a conductive tie structure of other materials to ensure good conductivity. In this embodiment, a ratchet-type tie is provided on the tie structure, which is easy to install and has high bundling strength, and can also be provided with a flexible buckle to form a flexible tie to realize the self-locking and adjustment of the tie-type structure. It is not limited in the embodiment.

In this embodiment, the live buckle cable tie includes: a cable tie body and a cable tie buckle; wherein, a cable tie buckle is provided at one end of the cable tie body; the cable tie body is a long strip structure, and the The two sides are serrated structures, the maximum width of the tie body is the width of the middle part of the tie body plus the height of the sawtooth, and the minimum width of the tie body is the width of the middle part of the tie body; the tie buckle is provided with a rectangular The insertion opening, the width of the rectangular insertion opening is greater than or equal to the maximum width of the cable tie body, the lower end surface of the cable tie buckle and the sides located on the opposite sides of the rectangular insertion opening are provided with locking blocks. The end surface is an inclined surface, that is, the distance between the top ends of the two locking blocks is less than the distance between the bottom ends, and the distance between the top ends of the two locking blocks is less than or equal to the width of the middle part of the tie body; The upper end surface and the side parts located on the opposite sides of the rectangular insertion opening are provided with unlocking blocks to form a live buckle cable tie; when in use, only need to insert the cable tie body from the upper end of the cable tie buckle to the direction of the lower end surface into the rectangular insert. After the strapping is positioned, the locking block will lock a set of corresponding serrations of the strap body, and the locking step is completed; The locking block opens out accordingly, and the tie body can be taken out from the tie buckle.

Referring to FIG. 3 , which is a partial enlarged view of a fixing member provided in an embodiment of the present invention. As shown in the figure, the fixing member 1 includes: a first bending belt 11 and a second bending belt 12; wherein, the second bending belt 12 and the first bending belt 11 are arranged at an angle, and the second bending belt The belt 12 and the first bending belt 11 are used to fit on the two wall surfaces at the protruding position of the lower edge of the steel cap 4 respectively, so as to realize the limit of the fixing member 1 . Specifically, the fixing member 1 can be installed on the protrusion of the lower edge of the steel cap 3 , and the first bending strap 11 and the second bending strap 12 are bent at a certain angle to prevent the fixing member 1 from slipping off. Wherein, the fixing member 1 may be a rigid cable tie structure, or may be other structures.

In the present embodiment, the shorting member 2 can constitute a discharge channel, through which current flows, so as to maintain the mechanical strength of the low-zero value disc insulator. Among them, the shorting piece 2 can take various forms, and can be shorted copper wire, such as solid copper wire, braided copper wire, etc., which can withstand the large arc test, preferably, the shorting piece 2 can be made of brass or red copper. The braided soft copper wire has good conductivity, can be bent at will, and can adapt to complex layout environments; of course, the shorting member 2 can also be of other structures, which are not limited in this embodiment. Among them, short-circuit copper wires of different diameters can be selected to meet the requirements of zero-value insulators against lightning strikes and anti-pollution flashovers at various voltage levels.

During the use of disc-shaped suspension porcelain insulators, when one or more insulators form zero-value insulators, in order to avoid flashovers caused by lightning strikes or other reasons for the insulator strings, due to the extremely small resistance at the head and the relatively short discharge distance along the umbrella disc The long resistance is relatively large, which causes most of the energy to be discharged from the discharge channel of the head of the porcelain insulator. The heat generated when the arc passes through the head of the insulator causes the insulator to explode, resulting in broken strings. The above device can be installed to zero value. On the insulator, that is, for example, the two fixing parts 1 of the above-mentioned device can be installed and fixed on the steel caps 4 on the upper and lower sides of the zero-value insulator 3 respectively. The zero-value insulator anti-lightning strike and anti-pollution flashover device constitutes a discharge channel, which can greatly reduce the further damage to the mechanical strength of the zero-value insulator, effectively maintain the mechanical strength of the insulator, and can prevent the zero-value insulator string breaking accident in advance. , prolong the replacement cycle, and the structure is simple, reliable, easy to assemble, low cost, and can reduce the cost of line operation and maintenance. Of course, when there are multiple zero-value insulators in the insulator string, a plurality of the zero-value insulators can also be installed in parallel with the zero-value insulators to prevent lightning strikes and anti-pollution flashover. The string devices are respectively short-circuited with a zero-value insulator. The specific number of zero-value insulators to be short-circuited can be determined according to the actual situation, but shall not exceed the “allowable number of zero-value insulators in a string”. In this embodiment, nothing is done to it. limited.

To sum up, the device for preventing lightning strike and anti-pollution flashover of the zero-value insulator provided in this embodiment is used to sleeve and clamp the two steel feet on both sides of the zero-value insulator 3 through two fixing parts 1 respectively, or , the two fixing parts 1 are used to be respectively sleeved and clamped on the two steel caps on both sides of the zero-value insulator 3, or the two fixing parts 1 are used to be sleeved and clamped on both sides of the zero-value insulator 3 respectively. On the steel feet and steel cap, to realize the fixation of the device, so that the device is fixed on the zero-value insulator 3 of the insulator string, and provides the support position of the short-circuit piece 2; by connecting in parallel with the zero-value insulator 3 to The insulator 3 is short-circuited to form a discharge channel and flow current, thereby preventing the insulator string from being disconnected due to lightning strike or large current generated by other reasons, which can effectively maintain the mechanical strength of the insulator and prolong the replacement cycle. It is convenient and can reduce the operation and maintenance cost of high-voltage lines. After the device is installed on the insulator string, once the insulator string suffers a flashover caused by lightning strike or other reasons, the device will be used as an external protection device to form a discharge channel, which can greatly reduce the further damage to the mechanical strength of the zero-value insulator. The high-value insulator breakage accident is prevented in advance, the replacement cycle is extended, and the assembly is convenient and the cost is low, which can reduce the cost of line operation and maintenance, and realize the zero-value insulator for high-voltage lines.

It should be noted that, in the description of the present invention, the terms “upper”, “lower”, “left”, “right”, “inner”, “outer” and other terms indicated in the direction or the positional relationship are based on the drawings. The direction or positional relationship shown is only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, it should also be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a It is a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. The utility model provides a antifouling flash string device of zero value insulator lightning protection, its characterized in that includes:

the two fixing pieces are respectively sleeved and clamped on the two steel feet on the two sides of the zero-value insulator, or respectively sleeved and clamped on the two steel caps on the two sides of the zero-value insulator, or respectively sleeved and clamped on the steel feet and the steel caps on the two sides of the zero-value insulator;

and the short connecting piece is arranged between the two fixing pieces, and two ends of the short connecting piece are respectively connected with the two fixing pieces and are used for being connected in parallel on the zero-value insulator to short-circuit the zero-value insulator to form a discharge channel and circulate current, so that the insulator is prevented from lightning and is prevented from pollution flashover and breaking.

2. The zero insulator lightning protection and fouling prevention flash string device according to claim 1, wherein the fixing member is a hoop structure or a ribbon structure.

3. The zero-value insulator lightning protection and contamination prevention flash string device according to claim 2, wherein the ribbon structure is a conductive ribbon structure.

4. The zero insulator lightning protection and pollution prevention flash string device according to claim 3, wherein the conductive ribbon structure is a ribbon structure made of brass or red copper.

5. The zero value insulator lightning protection and contamination prevention flash string device according to claim 2,

the binding belt type structure is provided with a ratchet wheel type binding buckle or a movable buckle for realizing self-locking and adjustment of the binding belt type structure.

6. The zero insulator lightning protection and fouling prevention flash string device according to any one of claims 1 to 5, wherein the fixture comprises:

a first bending strap;

the second bending belt is arranged at an included angle with the first bending belt, and the second bending belt and the first bending belt are used for being respectively attached to two walls of the protruding positions of the lower edge of the steel cap so as to realize the positioning between the fixing piece and the steel cap.

7. The zero insulator lightning protection and fouling prevention flash string device according to any one of claims 1 to 5, wherein the shorting piece is a solid copper wire or a braided copper wire.

8. The zero-value insulator lightning protection and contamination prevention flash string device according to claim 7, wherein the shorting member is a braided annealed copper wire made of brass or red copper.

9. The zero-value insulator lightning protection and pollution prevention flash string device according to any one of claims 1 to 5, wherein two ends of the short connecting piece are respectively connected to the two fixing pieces through welding.

10. The zero value insulator lightning protection and pollution prevention flash string device according to any one of claims 1 to 5,

the both ends of short connecting piece all are equipped with the cover and connect the ring, two the cover connects the ring rotatable respectively and connect in slidable on two on the mounting.

Images