Energized installation device for arrester

Abstract

The present invention relates to a live-installable device for a lightning arrester, belonging to the technical field of lightning arrester installation equipment. The live-installable device for a lightning arrester described in the present invention includes a plate-shaped structure installed at the bottom of the insulating column of the lightning arrester and a wire-hanging structure installed at the top of the insulating column of the lightning arrester and connected to the wire, wherein: for the plate-shaped structure, one end of the discharge plate is fixedly installed at the bottom of the insulating column, and the lower part is fixedly connected to the horizontal tail of the upper mounting plate. A middle spacer is fixedly connected below the upper mounting plate, and a lower mounting plate is rotatably connected below the middle spacer; for the wire-hanging structure, it includes a hanging frame, and a buckle is provided at the opening of the hanging frame. The hanging frame buckle is connected to the high-voltage insulating wire at the top of the insulating column. The present invention can meet the requirements for the overall live installation and disassembly of fixed-gap lightning arresters on overhead distribution lines, and has the advantages of simple disassembly and assembly, firm cooperation, safety and reliability, convenient operation and maintenance, etc., and can improve the power supply reliability of overhead distribution lines.

Description

Technical Field

[0001] The present invention relates to a live-installable device for a lightning arrester, belonging to the technical field of lightning arrester installation equipment. Background Art

[0002] In the technical field of distribution lines, lightning arresters have always been important devices for preventing lightning overvoltage, playing an important role in reducing distribution line tripping and protecting wire equipment from damage by lightning overvoltage. The gap lightning arrester for protecting the line does not bear overvoltage during normal operation, and has the characteristics of reliable performance, small size, light weight, and flexible installation. However, the gap lightning arresters currently applied in the market have the following problems: First, the gap is easily affected by factors such as wind vibration, thermal expansion and contraction of the wire, and the quality of construction workers, and the gap is prone to deviation, affecting the lightning protection effect; second, the line lightning arrester needs to be installed with power cut; third, after the lightning arrester is frequently damaged, it needs to be replaced with power cut for many times. The latter two points greatly reduce the power supply reliability of the power system.

[0003] Based on the above problems, various domestic studies have optimized the gap lightning arrester and fixed the distance of its gap part. However, the general fixed-gap lightning arrester still does not solve the problem that the line needs to be powered off during the installation and replacement of the lightning arrester. Our company has previously developed a lightning arrester that can replace the lightning arrester body with power on, and has applied for a patent and carried out trial hanging. However, it is found in a series of R & D processes that the power-off time required to replace the lightning arrester is less than that required for the first installation of the lightning arrester. Therefore, there is also a need for a fixed-gap lightning arrester that can be installed for the first time without power cut, and the structural installation method in cooperation with the cross arm should be simple; it is not easy to have installation accidents during installation; the lightning arrester is ensured to be stable after installation; and the lightning arrester should be connected to the line wire with power on during installation. This article provides a new structure for live installation of a fixed-gap lightning arrester, which can not only quickly install the overall structure and connect the line wire under live conditions, but also has a reliable structure and fixed gap, greatly increasing the power supply reliability of the power system and reducing various risks caused by improper operation of installation personnel and maintenance personnel. Summary of the Invention

[0004] In view of the above-mentioned defects existing in the prior art, the present invention proposes a live-installable device for a lightning arrester.

[0005] The live-installable device for a lightning arrester described in the present invention includes a plate-shaped structure installed at the bottom of the insulating column of the lightning arrester and a wire-hanging structure installed at the top of the insulating column of the lightning arrester, wherein:

[0006] The plate structure includes a discharge plate, an upper mounting plate, an intermediate spacer, a lower mounting plate, hex nuts and matching flat washers and long-head hex bolts. One end of the discharge plate is fixedly installed at the bottom of the insulating column, and the lower part is fixedly connected to one section of the upper mounting plate. An intermediate spacer is fixedly connected below the upper mounting plate, and the lower mounting plate is rotatably connected below the intermediate spacer. The discharge plate, the upper mounting plate, the intermediate spacer and the lower mounting plate are fixedly connected to the insulating column through hex nuts and matching flat washers, and the long-head hex bolts are used to cooperate with the installation environment to fix the overall structure.

[0007] The wire hanging structure includes a hanging rack. A buckle is provided at the opening of the hanging rack, and the buckle of the hanging rack is connected to the high-voltage insulating wire at the top of the insulating column.

[0008] Preferably, one end of the discharge plate far from the bottom of the insulating column extends downward to form a semi-circular surface, forming an air gap with a fixed distance.

[0009] Preferably, one end of the upper mounting plate far from the bottom of the insulating column extends downward to form a rectangular surface.

[0010] Preferably, a limiting groove is provided on the lower mounting plate, and rotation can be realized by using a special live installation tool.

[0011] Preferably, the limiting groove is a quarter-circular arc groove, with a small opening area and convenient for the live installation tool to drive the lower mounting plate to rotate.

[0012] Preferably, the hanging rack is in an inverted "J" shape, with a simple manufacturing process and can be mass-produced.

[0013] Preferably, the plate structure is made of stainless steel, which can improve the anti-corrosion and ablation resistance of the electrode.

[0014] The live-installable device of the lightning arrester described in the present invention has the following beneficial effects:

[0015] (1) The disassembly and assembly are simple. Only a special live installation operating rod is needed to realize the disassembly of the fixed-gap lightning arrester, the connection and disconnection from the line conductor, without the need for many complex operating equipment and tools.

[0016] (2) Safe and reliable. Since there is no need for power outage installation, personnel do not need to work at high altitudes with a live-line rod, reducing the risk of construction personnel. And this new installation structure only cooperates with the cross arm through the upper and lower mounting plates, and does not require nut tightening to prevent installation accidents such as the lightning arrester falling, further increasing the reliability of the lightning arrester installation construction.

[0017] (3) By using this new installation structure, it is possible to realize the disassembly, installation and replacement of the entire lightning arrester without power outage during operation and maintenance, reducing the risk of power outage, improving the reliability of power grid operation, and making the operation and maintenance method more convenient. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present invention.

[0019] Figure 2 is a schematic installation diagram of the present invention.

[0020] Figure 3 In (a) of, it is a schematic diagram of the vertical installation of the lower mounting plate, the discharge plate and the upper mounting plate.

[0021] Figure 3 In (b) of, it is a schematic diagram of the parallel installation of the lower mounting plate, the discharge plate and the upper mounting plate.

[0022] In the figure: 1, ball head electrode; 2, arrester body; 3, positioning cover; 4, protective cover; 5, connecting rod; 6, insulating support; 7, discharge plate; 8, hanging bracket; 9, air gap; 10, lower mounting plate; 11, hexagon nut; 12, long head hexagon bolt; 13, intermediate spacer; 14, upper mounting plate; 15, cross arm; 16, limit groove. Embodiment

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment:

[0025] As Figures 1 to 3 shown, the live-installable device of the arrester described in the present invention includes a plate-shaped structure installed at the bottom of the insulating support 6 of the arrester and a wire-hanging structure installed at the top of the insulating support 6 of the arrester, wherein:

[0026] The plate-type structure includes a discharge plate 7, an upper mounting plate 14, an intermediate pad 13 and a lower mounting plate 10. One end of the discharge plate 7 is fixedly mounted on the bottom of the insulating support 6, and the lower portion is fixedly connected to a section of the upper mounting plate 14. The lower portion of the upper mounting plate 14 is fixedly connected to the intermediate pad 13, and the lower portion of the intermediate pad 13 is rotatably connected to the lower portion of the lower mounting plate 10. The discharge plate 7, the upper mounting plate 14, the intermediate pad 13 and the lower mounting plate 10 are fixedly connected to the insulating support 6 through hexagonal nuts 11 and matching flat spring washers. Long-head hexagonal bolts 12 are used to match the installation environment and fix the overall structure. The specific connection method is: the discharge plate 7 and the upper mounting plate 14 are fixedly mounted on the bottom of the insulating support 6 by stud screws in a top-down arrangement order, the middle pad 13 is fixed to the corresponding position below the upper mounting plate 14 by welding, and the lower mounting plate 10 is fastened and loosened with the middle pad 13 by two sets of hexagonal nuts 11 and flat spring washers. After loosening, the gap between the lower mounting plate 10 and the upper mounting plate 14 is increased, which facilitates the suspension of the arrester with the cross arm 15. After fastening, the arrester can be fixed as a whole to a certain extent; During installation, slightly loosen the two hexagonal nuts 11 to increase the gap between the upper mounting plate 14 and the lower mounting plate 10, and rotate the lower mounting plate 10 to form a 90° angle with the upper mounting plate 14, insert the cross arm 15 into the gap between the upper mounting plate 14 and the lower mounting plate 10, and then rotate the lower mounting plate 10 back to the same direction as the upper mounting plate 14, so that the upper mounting plate 14 and the lower mounting plate 10 will clamp the cross arm 15, and there will be no risk of falling even if the hexagonal nuts 11 are not tightened. Finally, fix the long head hexagonal bolts 12 and the hexagonal nuts 11.

[0027] One end of the discharge plate 7 away from the bottom of the insulating support 6 extends downwardly into a semicircular surface to form an "L"-shaped bend, with the head of the "L"-shaped bend facing downward. The relative position between the head of the "L"-shaped bend of the discharge plate 7 and the ball head electrode 1 of the lightning arrester constitutes an air gap 9 of a fixed distance, ensuring that lightning discharge occurs in this air gap 9.

[0028] The upper mounting plate 14 extends downwardly out of a rectangular surface at one end away from the bottom of the insulating support 6. The rectangular surface can be tightly matched with the vertical surface of the cross arm by tightening a special live installation tool, so that it can be installed more conveniently and effectively.

[0029] The lower mounting plate 10 is provided with a quarter arc shaped limit groove 16. By using a special live installation tool to move one end of the limit groove 16, the lower mounting plate 10 is driven to rotate. The quarter arc limit groove 16 is set to reduce the opening area and facilitate the live installation tool to move and save materials.

[0030] The components of the plate-type structure are all made of stainless steel plates, which can effectively solve the anti-corrosion problem of ordinary steel metal materials and improve the anti-corrosion and ablation resistance of the electrodes. By applying the COMSOL Multiphysics simulation software, the stress analysis and electric field simulation of the plate-type structure are carried out, so that the optimal scheme is achieved in terms of weight and strength, electrical and mechanical properties. By adjusting the size of the plate-type structure, it can be applied to the live installation and disassembly of various types of crossarms 15.

[0031] The wire hanging structure includes a hanging bracket 8. A buckle is provided at the opening of the hanging bracket 8, and the buckle of the hanging bracket 8 is connected to the high-voltage insulating wire at the top of the insulating column 6. The hanging bracket 8 is in an inverted "J" shape, and the manufacturing process of the inverted "J" shaped hanging bracket 8 is simple and can be mass-produced. The upper end of the insulating column 6 is connected to the overhead line through a lead wire and the hanging bracket 8. The wire hanging structure is connected to the top end of the arrester through a wire nose and fixed to the hanging bracket 8 at the other end. By loosening and tightening the fastening screws on the hanging bracket 8, the function of live connection or disconnection from the line conductor can be realized. The main operation method is to first use a special live installation operating rod to lift the wire hanging structure, hang the wire clamp on the conductor, and then use the special live installation operating rod to tighten the screws, so that the hanging bracket 8 and the conductor can connect the arrester and the line conductor. Just operate in the reverse direction when disassembling.

[0032] By adjusting the fastening screws of the wire hanging structure, it can be applied to conductors with a model of 120 - 240 mm2.

[0033] The usage process of the present invention is as follows: For the live installation device of the arrester described in the present invention, it can be installed live when hanging the network. Use a special live installation operating rod to hang the entire arrester on the crossarm 15 and tighten it; after the network is hung and in operation, when the maintenance personnel find that the arrester fails, the arrester body 2 can be replaced live with a live replacement operating rod. When replacing, use the live operating rod to lift the arrester and rotate it counterclockwise to remove the arrester body 2 part. Then use the live operating rod to lift the new arrester body 2, insert the special structure at the upper end of the arrester into the positioning cover 3 and the protection cover 4 and rotate it clockwise, and then connect it to the insulating column 6 through the connecting rod 5 at the upper end of the protection cover 4 to install and fix the arrester.

[0034] When the device operates normally, the air gap 9 isolates the system voltage, and the arrester body 2 bears a relatively low voltage. The aging problem under long-term operating voltage does not need to be considered, which greatly improves its reliability and reduces the maintenance cost. When the power line is struck by lightning, under the action of lightning overvoltage, the air gap 9 between the mounting plate and the ball head electrode 1 is broken down, and the arrester body 2 presents a low impedance. The lightning current is discharged into the ground through the arrester body 2, the air gap 9, the mounting plate, the cross arm 15 and the tower. After the lightning impulse, the power frequency voltage is applied to the arrester, the resistance of the arrester body 2 instantaneously increases, the current passing through, that is, the arc current, is suppressed to a relatively low value, the arc voltage drop of the air gap 9 increases, the insulation of the air gap 9 is quickly restored, the arc naturally extinguishes in a very short time, the power frequency follow current is completely interrupted, and the normal working condition is restored.

[0035] The present invention can be widely applied to the occasions of arrester installation equipment.

[0036] The circuits, electronic components and modules involved are all prior arts, and those skilled in the art can fully implement them without further elaboration. The content protected by the present invention does not involve the improvement of software and methods either.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energized installation device for a lightning arrester, characterized in that, It includes a plate-shaped structure installed at the bottom of the arrester insulating post (6) and a wire hanging structure installed at the top of the arrester insulating post (6) and connected to the wire. Among them: The plate-shaped structure includes a discharge plate (7), an upper mounting plate (14), an intermediate spacer (13), a lower mounting plate (10), a hexagonal nut (11) and a matching flat spring washer, and a long-head hexagonal bolt (12); One end of the discharge plate (7) is fixedly installed at the bottom of the insulating post (6), and the lower part is fixedly connected to the horizontal tail of the upper mounting plate (14). An intermediate spacer (13) is fixedly connected below the upper mounting plate (14), and a lower mounting plate (10) is rotatably connected below the intermediate spacer (13); The discharge plate (7), the upper mounting plate (14), the intermediate spacer (13), and the lower mounting plate (10) are fixedly connected to the insulating post (6) through the hexagonal nut (11) and the matching flat spring washer. The long-head hexagonal bolt (12) is used to cooperate with the installation environment to fix the overall structure; The wire hanging structure includes a hanging bracket (8). A buckle is provided at the opening of the hanging bracket (8), and the buckle of the hanging bracket (8) is connected to the high-voltage insulating wire at the top of the insulating post (6); A limiting groove (16) is provided on the lower mounting plate (10); The limiting groove (16) is a quarter-circular arc groove. The hanging bracket (8) is in an inverted "J" shape.

2. The live-installable device of the lightning arrester according to claim 1, characterized in that, The bent end of the discharge plate (7) away from the bottom of the insulating post (6) extends downward to form a semi-circular surface.

3. The live-installable device for an arrester according to claim 1, characterized in that, The bent end of the upper mounting plate (14) away from the bottom of the insulating post (6) extends downward to form a rectangular surface.

4. The live-installable device of the lightning arrester according to claim 1, characterized in that, The plate-shaped structure is made of stainless steel.

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