A multi-chamber arc-extinguishing arrester

Abstract

The present invention relates to a multi-chamber arc-extinguishing lightning arrester, comprising a first fixed ring and a second fixed ring arranged up and down, the first fixed ring and the second fixed ring are both conductors, the first fixed ring is provided with three evenly arranged discharge interfaces downward, the second fixed ring is connected with three vertically arranged multi-chamber arc-extinguishing fixed gap devices upward, the three discharge interfaces correspond to the upper end positions of the three multi-chamber arc-extinguishing fixed gap devices, the upper ends of the three multi-chamber arc-extinguishing fixed gap devices are close to the three discharge interfaces, and a vertically arranged lightning arrester insulator is provided on one side of each multi-chamber arc-extinguishing fixed gap device, and the upper and lower ends of each lightning arrester insulator are respectively connected to the first fixed ring and the second fixed ring. The arc nozzles of the multiple multi-chamber arc-extinguishing fixed gap devices of the multi-chamber arc-extinguishing lightning arrester are arranged toward the inner sides of the second fixed ring and the first fixed ring, so that the advantages of easy installation and good lightning protection effect can be achieved in some environments with narrow space.

Description

Technical Field

[0001] The invention relates to a multi-chamber arc-extinguishing arrester. Background Art

[0002] With the development of social economy, AC overhead lines in power systems are covering a wider area, and lightning has a great impact on the reliability of AC overhead lines. Accidents such as lightning tripping and insulator flashover frequently occur in AC overhead lines at home and abroad, causing huge economic losses and seriously threatening the safe operation of overhead lines.

[0003] The effective lightning protection measure for high-voltage AC overhead lines is to install line arresters. At present, the line arresters used on overhead lines mainly include line-type zinc oxide arresters and protective gap arresters. The self-extinguishing arc multi-gap arresters that have emerged in recent years have attracted widespread attention in the industry for their high cost performance. Line-type zinc oxide arresters are mature in technology and can extinguish power frequency continuous current. They have been widely used in overhead lines; however, their performance is easily deteriorated during operation, resulting in high operating and maintenance costs.

[0004] The protective gap arrester has a large current capacity and is simple and practical; however, it has the disadvantage of causing line tripping due to power frequency continuous current when struck by lightning. The self-extinguishing arc multi-gap arrester has the advantages of large current capacity, simplicity and practicality of the protective gap arrester, and can extinguish the power frequency continuous current to avoid tripping. Since the installation method and position of line insulators and arresters are universal, in order to ensure the safety and feasibility of the line without significantly increasing the difficulty and cost of line installation and maintenance, the development of multi-gap arresters with insulator functions has become a direction.

[0005] Since the pole tower is a high-frequency area where lightning strikes, the lightning protection measures at the pole tower are more stringent. For the pole tower area with limited installation space, especially for the 35kv overhead line pole tower in some environments with narrow space, it is particularly important to realize a pole tower lightning protection system that is easy to install and has good lightning protection effect. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a multi-chamber arc-extinguishing lightning arrester that can be easily installed and has good lightning protection effect in some environments with narrow space, and can meet the lightning protection requirements at the tower when used.

[0007] The object of the present invention is achieved in that:

[0008] A multi-chamber arc-extinguishing lightning arrester comprises a first fixing ring and a second fixing ring which are arranged up and down, the first fixing ring and the second fixing ring are both conductors, the first fixing ring is provided with three evenly arranged discharge interfaces downward, the second fixing ring is connected with three vertically arranged multi-chamber arc-extinguishing fixed gap devices upward, the three discharge interfaces correspond to the upper ends of the three multi-chamber arc-extinguishing fixed gap devices, the upper ends of the three multi-chamber arc-extinguishing fixed gap devices are close to the three discharge interfaces, a vertically arranged lightning arrester insulator is provided on one side of each multi-chamber arc-extinguishing fixed gap device, and the upper and lower ends of each lightning arrester insulator are respectively connected to the first fixing ring and the second fixing ring.

[0009] As a preferred embodiment, the multi-chamber arc extinguishing fixed gap device includes a fixed base, a silicone insulating sleeve, an insulating core rod, a top conductive joint, a bottom conductive joint and a plurality of conductive beads arranged vertically at intervals. The upper end surface of the fixed base is provided with an insulating core rod plug interface and a bottom conductive joint plug interface. The insulating core rod and the bottom conductive joint are respectively plugged upward into the insulating core rod plug interface and the bottom conductive joint plug interface. A silicone insulating sleeve is provided outside the insulating core rod and the bottom conductive joint. The silicone insulating sleeve is a columnar structure as a whole. The top of the silicone insulating sleeve is provided with a connection to the top conductive joint. One side of the silicone insulating sleeve is provided with a plurality of arc nozzles along the height direction. The arc nozzle is directed in the direction of the discharge port, a plurality of arc nozzles are arranged in a row from top to bottom, the direction of the arc nozzle is arranged horizontally and toward the inner side of the first fixing ring and the second fixing ring, the plurality of conductive beads are also arranged in a row from top to bottom, each conductive bead is arranged close to the outer edge of the silicone insulating sleeve, and the height position of each conductive bead is just located at the elevated position between the upper and lower adjacent arc nozzles, the top conductive joint, the plurality of conductive beads and the bottom conductive joint are discontinuously isolated by silicone in the entire silicone insulating sleeve, the fixed base of the multi-chamber arc extinguishing fixed gapper is installed on the second fixing ring, the upper end of the top conductive joint corresponds to the position of the discharge interface and a gap is left between the two.

[0010] As a preferred embodiment, the number of the discharge interface, multi-chamber arc extinguishing fixed gap device and lightning arrester insulator is more than three, the discharge port of the multi-chamber arc extinguishing fixed gap device faces inward and the arcs are misaligned with each other during discharge and will not hit any solid components.

[0011] As a preferred embodiment, the discharge interface, the multi-chamber arc-extinguishing fixed gap device and the arrester insulator are equally arranged on the first fixed ring and the second fixed ring.

[0012] Preferably, a first connecting bracket is connected to the first fixing ring, and the first connecting bracket includes a first connecting ball. Three first connecting rods are equally connected to the first connecting ball obliquely downward, and the outer ends of the three first connecting rods are connected to the inner ring of the first fixing ring. The outer end positions of the three first connecting rods correspond to the upper end positions of the multi-chamber arc extinguishing fixed gap device. The first connecting ball is upwardly connected to a first connecting seat, and the first connecting seat is connected to the outer end of the lightning arrester crossarm.

[0013] Preferably, a second connecting bracket is connected to the second fixing ring, and the second connecting bracket includes a second connecting ball. Three second connecting rods are equally connected to the second connecting ball obliquely upward, and the outer ends of the three second connecting rods are connected to the inner ring of the second fixing ring. The outer end positions of the three second connecting rods correspond to the lower end positions of the multi-chamber arc extinguishing fixed gap device. The second connecting ball is downwardly connected to a second connecting seat, and the second connecting seat is connected to the wire.

[0014] A multi-chamber arc-extinguishing lightning arrester has the following working method: after lightning strikes a cable, the current flows to the fixed base of the multi-chamber arc-extinguishing lightning arrester through the wire clamp and the wire, and then reaches the second fixed ring. Since a plurality of multi-chamber arc-extinguishing fixed gap devices are arranged in parallel between the second fixed ring and the first fixed ring, the current is divided, and the current on each multi-chamber arc-extinguishing fixed gap device gradually decreases. The current passes through a plurality of conductive beads on the multi-chamber arc-extinguishing fixed gap device and releases the arc to the outside of the arc nozzle, thereby gradually reducing the current directed to the first fixed ring. If part of the current still exists when it finally reaches the first fixed ring, it is grounded and released through the internal wire.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] After lightning strikes a cable line, the current of the multi-chamber arc-extinguishing lightning arrester of the present invention flows to the fixed base of the multi-chamber arc-extinguishing lightning arrester through the wire clamp and the wire, and then reaches the second fixed ring. Since a plurality of multi-chamber arc-extinguishing fixed gap devices are arranged in parallel between the second fixed ring and the first fixed ring, the current is shunted, and the current on each multi-chamber arc-extinguishing fixed gap device gradually decreases, and the current passes through a plurality of conductive beads on the multi-chamber arc-extinguishing fixed gap device and releases the arc to the outside of the arc nozzle, so that the current directed to the first fixed ring gradually decreases. If there is still some current on the first fixed ring, it is grounded and released through the internal wire. Since the arc nozzles of the plurality of multi-chamber arc-extinguishing fixed gap devices are arranged toward the inner sides of the second fixed ring and the first fixed ring, the advantages of easy installation and good lightning protection effect can be achieved in some environments with narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of a tower lightning protection system of the present invention.

[0018] Figure 2 It is a schematic diagram of the multi-chamber arc-extinguishing arrester in the present invention.

[0019] Figure 3 It is a schematic diagram of the external structure of the multi-chamber arc-extinguishing fixed gap device in the present invention.

[0020] Figure 4 It is a schematic diagram of the internal structure of the multi-chamber arc extinguishing fixed gap device in the present invention.

[0021] Figure 5 for Figure 3 Schematic diagram of the first view of the fixed base.

[0022] Figure 6 for Figure 3 Schematic diagram of the second view of the fixed base.

[0023] in:

[0024] Tower 100

[0025] Cross arm connection seat 200

[0026] Insulator string connecting crossbar 300

[0027] Arrester cross arm 400

[0028] Insulator string 500

[0029] Cable 600

[0030] Multi-chamber arc arrester 700

[0031] First fixing ring 701, discharge interface 701.1

[0032] The second fixing ring 702,

[0033] Multi-chamber arc extinguishing fixed gapper 703, fixed base 703.1, bolt connection hole 703.1.1, insulating core rod plug interface 703.1.2, bottom conductive joint plug interface 703.1.3, silicone insulating sleeve 703.2, arc nozzle 703.2.1, insulating core rod 703.3, top conductive joint 703.4, bottom conductive joint 703.5, conductive bead 703.6

[0034] Lightning arrester insulator 704,

[0035] First connecting bracket 705, first connecting ball 705.1, first connecting rod 705.2, first connecting seat 705.3

[0036] Second connecting bracket 706, second connecting ball 706.1, second connecting rod 706.2, second connecting seat 706.3

[0037] Cable clamp 800

[0038] Wire 900. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 6 The present invention relates to a tower lightning protection system, which includes a tower 100, on which a cross arm connection seat 200 is installed at different heights according to height requirements, and the cross arm connection seat 200 is connected to an insulator string connecting cross bar 300 and an arrester cross arm 400 on the same horizontal plane, and the outer end of the insulator string connecting cross bar 300 is connected to an insulator string 500, and the insulator string 500 is connected to a cable 600 outwardly, and the outer end of the arrester cross arm 400 is downwardly connected to a multi-chamber arc-extinguishing lightning arrester 700, and the arrester cross arm 400 is a hollow insulating cross arm, and the insulating cross arm is provided with an internal wire, one end of the internal wire is connected to the top of the multi-chamber arc-extinguishing lightning arrester 700, and the other end of the internal wire passes through the insulating cross arm for grounding. The cable 600 is provided with a wire clamp 800 near the insulator string 500, and the lead wire 900 on the wire clamp 800 is connected to the bottom of the multi-chamber arc-extinguishing lightning arrester 700.

[0041] The multi-chamber arc-extinguishing lightning arrester 700 includes a first fixing ring 701 and a second fixing ring 702 arranged up and down, the first fixing ring 701 and the second fixing ring 702 are both hollow metal tubes, the first fixing ring 701 is provided with three evenly arranged discharge interfaces 701.1 downwardly, the discharge interfaces 701.1 are tubular structures with the tube mouths facing downwards, the second fixing ring 702 is connected upwardly with three vertically arranged multi-chamber arc-extinguishing fixed gap devices 703, the three discharge interfaces 701.1 and the three multi-chamber arc-extinguishing fixed gap devices 703 are connected to each other. Corresponding to the upper end position, the upper ends of the three multi-chamber arc-extinguishing fixed gap devices 703 are close to the three discharge interfaces 701.1, and the three multi-chamber arc-extinguishing fixed gap devices 703 are arranged in an equilateral triangle with equal intervals. A vertically arranged lightning arrester insulator 704 is provided on one side of each multi-chamber arc-extinguishing fixed gap device 703. There are three lightning arrester insulators 704 in total, and the three lightning arrester insulators 704 are also arranged in an equilateral triangle with equal intervals. The upper and lower ends of each lightning arrester insulator 704 are respectively connected to the first fixing ring 701 and the second fixing ring 702.

[0042] The multi-chamber arc extinguishing fixed gap device 703 includes a fixed base 703.1, a silicone insulating sleeve 703.2, an insulating core rod 703.3, a top conductive joint 703.4, a bottom conductive joint 703.5 and a plurality of conductive beads 703.6 arranged vertically at intervals. The lower end surface of the fixed base 703.1 is provided with two bolt connection holes 703.1.1, and the upper end surface of the fixed base 703.1 is provided with an insulating core rod plug interface 703.1.2 and a bottom conductive joint plug interface 703.1.3, the insulating core rod plug-in port 703.1.2 and the bottom conductive joint plug-in port 703.1.3 are respectively inserted upward into the insulating core rod 703.3 and the bottom conductive joint 703.5, and the insulating core rod 703.3 and the bottom conductive joint 703.5 are connected to the outside of the silicone insulating sleeve 703.2, the silicone insulating sleeve 703.2 is a cylindrical structure as a whole, and the top of the silicone insulating sleeve 703.2 is connected to the top conductive joint 703.4, and the silicone insulating sleeve 703.2 is connected to the top conductive joint 703.4. A plurality of arc nozzles 703.2.1 are arranged along the height direction on one side of the silicone insulating sleeve 703.2, and the arc nozzles 703.2.1 point in the direction of the discharge port. The plurality of arc nozzles 703.2.1 are arranged in a row from top to bottom, and the arc nozzles 703.2.1 are arranged in a horizontal direction and face the inner sides of the first fixing ring 701 and the second fixing ring 702. The plurality of conductive beads 703.6 are also arranged in a row from top to bottom, and each conductive bead 703.6 is arranged close to the outer edge of the silicone insulating sleeve 703.2, and each conductive bead 703.6 is arranged close to the outer edge of the silicone insulating sleeve 703.2. The height position of 03.6 is just located at the elevated position between the two adjacent arc nozzles 703.2.1 above and below. The top conductive joint 703.4, the plurality of conductive beads 703.6 and the bottom conductive joint 703.5 are isolated by silicone discontinuities in the entire silicone insulating sleeve 703.2. When the bottom conductive joint 703.5 receives an instantaneous high voltage, the current is conducted upward along the plurality of conductive beads 703.6 from bottom to top, and the arc is released outward at the arc nozzle 703.2.1 at the corresponding height for discharge. The fixed base 703.1 of the multi-chamber arc extinguishing fixed gapper 703 is screwed into the bolt connection hole 703.1.1 by bolts to install the multi-chamber arc extinguishing fixed gapper 703 on the second fixing ring 702.

[0043] The discharge port of the multi-chamber arc extinguishing fixed gap device 703 is arranged toward the inner circle of the first fixed ring 701 and the second fixed ring 702, and the discharge ports of the three multi-chamber arc extinguishing fixed gap devices 703 are misaligned and cannot face other multi-chamber arc extinguishing fixed gap devices 703 or the lightning arrester insulator 704.

[0044] The first fixing ring 701 is connected with a first connecting bracket 705, the first connecting bracket 705 includes a first connecting ball 705.1, and three first connecting rods 705.2 are equally connected to the first connecting ball 705.1 obliquely downward, and the outer ends of the three first connecting rods 705.2 are connected to the inner ring of the first fixing ring 701, and the outer ends of the three first connecting rods 705.2 correspond to the upper end of the multi-chamber arc extinguishing fixed gap device 703. The first connecting ball 705.1 is upwardly connected with a first connecting seat 705.3, and the first connecting seat 705.3 is provided with a first mounting hole. The first connecting seat 705.3 is hinged to the outer end of the arrester cross arm 400 by screwing a rotating rod into the first mounting hole.

[0045] The second fixing ring 702 is connected to a second connecting bracket 706, and the second connecting bracket 706 includes a second connecting ball 706.1. Three second connecting rods 706.2 are equally connected to the second connecting ball 706.1 obliquely upward, and the outer ends of the three second connecting rods 706.2 are connected to the inner ring of the second fixing ring 702. The outer end positions of the three second connecting rods 706.2 correspond to the lower end positions of the multi-chamber arc extinguishing fixed gap device 703. The second connecting ball 706.1 is downwardly connected to a second connecting seat 706.3, and a second mounting hole is provided on the second connecting seat 706.3.

[0046] The number of the above-mentioned discharge interface 701.1, multi-chamber arc-extinguishing fixed gap device 703 and lightning arrester insulator 704 can be three or more, as long as the discharge port of the multi-chamber arc-extinguishing fixed gap device 703 faces inward after installation and is displaced during discharge. The discharge port of the multi-chamber arc-extinguishing fixed gap device 703 faces inward and the arcs are displaced from each other during discharge and will not hit any physical component. Physical components refer to any of the above-mentioned components. Discharging toward the inside can release a larger arc in a relatively small installation area, so as not to cause interference between two adjacent multi-chamber arc-extinguishing lightning arresters 700 or affect other nearby components.

[0047] Working principle:

[0048] After lightning strikes the cable, the current flows to the fixed base of the multi-chamber arc-extinguishing arrester through the wire clamp and the wire, and then reaches the second fixed ring. Since three or more multi-chamber arc-extinguishing fixed gap devices are arranged in parallel between the second fixed ring and the first fixed ring, the current is divided, and the current on each multi-chamber arc-extinguishing fixed gap device gradually decreases. The current passes through multiple conductive beads on the multi-chamber arc-extinguishing fixed gap device and releases the arc to the outside of the arc nozzle, thereby gradually reducing the current directed to the first fixed ring. If there is still some current on the first fixed ring, it is grounded and released through the internal wire. When the multi-chamber arc-extinguishing arrester is working, since the direction of arc release occupies most of the space in the first and second fixed ring areas of the multi-chamber arc-extinguishing arrester, the multi-chamber arc-extinguishing arrester is suitable for installation in a narrow space.

[0049] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A multi-chamber arc-extinguishing lightning arrester, comprising a first fixing ring (701) and a second fixing ring (702) arranged in an upper and lower manner, the first fixing ring (701) and the second fixing ring (702) are both conductors, the first fixing ring (701) is provided with three evenly arranged discharge interfaces (701.1) downwardly, the second fixing ring (702) is connected with three vertically arranged multi-chamber arc-extinguishing fixed gap devices (703) upwardly, the three discharge interfaces (701.1) and the upper ends of the three multi-chamber arc-extinguishing fixed gap devices (703) are located in corresponding positions, the upper ends of the three multi-chamber arc-extinguishing fixed gap devices (703) are close to the three discharge interfaces (701.1), one side of each multi-chamber arc-extinguishing fixed gap device (703) is provided with a vertically arranged lightning arrester insulator (704), and the upper end and the lower end of each lightning arrester insulator (704) are respectively connected to the first fixing ring (701) and the second fixing ring (702); The multi-chamber arc-extinguishing fixed gap device (703) comprises a fixed base (703.1), a silicone insulating sleeve (703.2), an insulating core rod (703.3), a top conductive joint (703.4), a bottom conductive joint (703.5), and a plurality of conductive beads (703.6) arranged vertically at intervals. The upper end surface of the fixed base (703.1) is provided with an insulating core rod plug interface (703.1.2) and a bottom conductive joint plug interface (703.1.3). The insulating core rod plug interface (703.1.2) ) and a bottom conductive joint plug interface (703.1.3), the insulating core rod (703.3) and the bottom conductive joint (703.5) are respectively plugged upward, the insulating core rod (703.3) and the bottom conductive joint (703.5) are connected to each other with a silicone insulating sleeve (703.2) outside, the silicone insulating sleeve (703.2) is a columnar structure as a whole, the top of the silicone insulating sleeve (703.2) is provided with a connection to the top conductive joint (703.4), and one side of the silicone insulating sleeve (703.2) is provided with a plurality of arcs along the height direction The arc nozzle (703.2.1) is directed in the direction of the discharge port, the arc nozzles (703.2.1) are arranged in a row from top to bottom, the arc nozzles (703.2.1) are arranged in a horizontal direction and face the inner sides of the first fixing ring (701) and the second fixing ring (702), the conductive beads (703.6) are also arranged in a row from top to bottom, each conductive bead (703.6) is arranged close to the outer edge of the silicone insulating sleeve (703.2), and the height of each conductive bead (703.6) is The device is located at a raised position just between two upper and lower adjacent arc nozzles (703.2.1); the top conductive joint (703.4), a plurality of conductive beads (703.6) and the bottom conductive joint (703.5) are isolated by silicone discontinuities in the entire silicone insulating sleeve (703.2); the fixed base (703.1) of the multi-chamber arc extinguishing fixed gap device (703) is installed on the second fixed ring (702); the upper end of the top conductive joint (703.4) corresponds to the position of the discharge interface (701.1) and a gap is left between the two; The number of the discharge interface (701.1), the multi-chamber arc-extinguishing fixed gap device (703) and the arrester insulator (704) is more than three, the discharge port of the multi-chamber arc-extinguishing fixed gap device (703) faces inwards and the arcs are mutually dislocated during discharge and will not hit any physical component; The discharge interface (701.1), the multi-chamber arc-extinguishing fixed gap device (703) and the lightning arrester insulator (704) are equally arranged on the first fixing ring (701) and the second fixing ring (702); The first fixing ring (701) is connected to a first connecting bracket (705), the first connecting bracket (705) comprises a first connecting ball (705.1), three first connecting rods (705.2) are equally connected to the first connecting ball (705.1) obliquely downward, the outer ends of the three first connecting rods (705.2) are connected to the inner ring of the first fixing ring (701), the outer end positions of the three first connecting rods (705.2) correspond to the upper end positions of the multi-chamber arc-extinguishing fixed gap device (703), the first connecting ball (705.1) is upwardly connected to a first connecting seat (705.3), and the first connecting seat (705.3) is connected to the outer end of the arrester cross arm (400); The number of the discharge interface (701.1), the multi-chamber arc-extinguishing fixed gap device (703), the lightning arrester insulator (704) and the first connecting rod (705.2) is more than three and they are arranged in equal parts; The second fixing ring (702) is connected to a second connecting bracket (706), the second connecting bracket (706) comprises a second connecting ball (706.1), three second connecting rods (706.2) are equally connected to the second connecting ball (706.1) obliquely upward, the outer ends of the three second connecting rods (706.2) are connected to the inner ring of the second fixing ring (702), the outer end positions of the three second connecting rods (706.2) correspond to the lower end positions of the multi-chamber arc extinguishing fixed gap device (703), the second connecting ball (706.1) is downwardly connected to a second connecting seat (706.3), and the second connecting seat (706.3) is connected to a wire.

2. A multi-chamber arc-extinguishing arrester according to claim 1, characterized in that The number of the discharge interface (701.1), the multi-chamber arc-extinguishing fixed gap device (703), the lightning arrester insulator (704) and the second connecting rod (706.2) is more than three and they are equally spaced.

3. A method for operating a multi-chamber arc-extinguishing arrester according to claim 1 or 2, characterized in that After lightning strikes the cable, the current flows through the wire clamp and the wire to the fixed base of the multi-chamber arc extinguishing arrester, and then reaches the second fixed ring. Since a plurality of multi-chamber arc extinguishing fixed gap devices are arranged in parallel between the second fixed ring and the first fixed ring, the current is divided, and the current on each multi-chamber arc extinguishing fixed gap device gradually decreases. The current passes through a plurality of conductive beads on the multi-chamber arc extinguishing fixed gap device and releases the arc to the outside of the arc nozzle, thereby gradually reducing the current directed to the first fixed ring. If some current still exists when it finally reaches the first fixed ring, it is released to the ground through the internal wire.

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