Combined gap type lightning arrester system

Abstract

The invention relates to a combined gap type lightning arrester system, which is characterized in that an A-phase lightning arrester group, a B-phase lightning arrester group and a C-phase lightning arrester group respectively comprise an upper lightning arrester, an upper insulating support column, a lower insulating support column and a lower lightning arrester, and an inter-phase connecting plate is arranged between the upper insulating support column and the lower insulating support column; the upper side and the lower side of each interphase connecting plate are respectively provided with an upper discharge gap rod and a lower discharge gap rod, the interphase connecting plate of the A-phase lightning arrester group is connected with the upper wiring terminal of the B-phase lightning arrester group through a first interphase line bank, and the interphase connecting plate of the B-phase lightning arrester group is connected with the upper wiring terminal of the C-phase lightning arrester group through a second interphase line bank; and the inter-phase connecting plate of the C-phase lightning arrester group is connected with an upper wiring terminal at the upper end of the A-phase lightning arrester group through a third inter-phase line bank. According to the invention, the phase-to-ground voltage of the line can be limited, the inter-phase voltage can also be limited, and in addition, each phase of lightning arrester group is provided with a double-gap structure, so that the service life of the lightning arrester is prolonged, and the safety of the lightning arrester is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lightning arresters, in particular to a combined gap-type lightning arrester system. Background Art

[0002] Metal oxide arresters are mainly used to prevent overvoltages in power transmission lines from damaging electrical equipment. However, the arresters in the prior art only provide single-phase protection. If the system line generates an interphase overvoltage, the interphase voltage cannot be limited, which will cause an interphase short circuit or an increase in the interphase voltage, damaging the power equipment. In addition, the existing arresters themselves have no gaps, and the arresters of each phase are installed in parallel with the power transmission line, with the high-voltage end connected to the transmission line and the low-voltage end grounded. Therefore, the arresters of each phase need to withstand the power frequency voltage at all times, which can easily lead to aging of the resistor and reduce the service life of the product. In addition, the arrester jacket is easily degraded by the voltage, resulting in flashover. For example, the CN201066763Y patent discloses a composite RC combined arrester. Since the arrester itself has no gap, the device includes three discharge gap units in addition to four arrester units. One end of the three arrester units is respectively connected to the A, B, and C phase lines of the protected equipment, and the other end is respectively connected to the corresponding discharge gap unit. The other end of each discharge gap unit is connected to a common point, and one end of the fourth arrester is connected to the common point, and the other end is grounded. In addition, the device also includes three RC units, which are respectively connected in parallel at both ends of the corresponding discharge gap units. Summary of the invention

[0003] The purpose of the present invention is to provide a combined gap-type lightning arrester system, which can limit the line phase-to-ground voltage and the phase-to-phase voltage at the same time, avoid phase-to-phase short circuit or phase-to-phase voltage increase, and protect power equipment from damage. In addition, each phase lightning arrester group is provided with a double gap structure, which greatly reduces the aging rate of the lightning arrester resistor and the deterioration rate of the outer jacket, thereby improving the service life and safety of the lightning arrester.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A combined gap type lightning arrester system, comprising an A-phase lightning arrester group, a B-phase lightning arrester group and a C-phase lightning arrester group, wherein the A-phase lightning arrester group, the B-phase lightning arrester group and the C-phase lightning arrester group have the same structure and each comprises an upper lightning arrester, an upper insulating support, a lower insulating support and a lower lightning arrester connected in sequence from top to bottom, wherein an interphase connecting plate is provided between the corresponding upper insulating support and the lower insulating support, and an upper discharge gap rod and a lower discharge gap rod are provided on the upper side and the lower side of each interphase connecting plate, wherein the upper discharge gap rod and the lower discharge gap rod are provided on the upper side and the lower side of each interphase connecting plate, and the upper discharge gap rod and the lower discharge gap rod are provided on the upper side and the lower side of each interphase connecting plate. A discharge gap is formed between the lower discharge gap rods, the interphase connecting plate of the A-phase lightning arrester group is connected to the upper terminal of the B-phase lightning arrester group through the first interphase wiring bar, the interphase connecting plate of the B-phase lightning arrester group is connected to the upper terminal of the C-phase lightning arrester group through the second interphase wiring bar, the interphase connecting plate of the C-phase lightning arrester group is connected to the upper terminal of the upper end of the A-phase lightning arrester group through the third interphase wiring bar, and the lower end of the A-phase lightning arrester group, the lower end of the B-phase lightning arrester group and the lower end of the C-phase lightning arrester group are all grounded.

[0006] A first upper flange is provided at the upper end of the upper insulating support, and a first lower flange is provided at the lower end, wherein the first upper flange is fixedly connected to the first lightning arrester flange at the lower end of the upper lightning arrester, the first lower flange is fixedly connected to the upper side of the corresponding phase connecting plate, and a first upper discharge gap rod is provided on the lower side of the first upper flange, and a first lower discharge gap rod is provided on the upper side of the first lower flange.

[0007] The first arrester flange and the first upper flange are fixedly connected by a first bolt and nut assembly, and the tail end of the first upper discharge gap rod is fixed to the first bolt and nut assembly of any group.

[0008] A second upper flange is provided at the upper end of the lower insulating support, and a second lower flange is provided at the lower end, wherein the second upper flange is fixedly connected to the lower side of the corresponding phase-to-phase connecting plate, the second lower flange is fixedly connected to the second lightning arrester flange at the upper end of the lower lightning arrester, a second upper discharge gap rod is provided on the lower side of the second upper flange, and a second lower discharge gap rod is provided on the upper side of the second lower flange.

[0009] The second lower flange and the second arrester flange are fixedly connected by a third bolt and nut assembly, and the tail end of the second lower discharge gap rod is fixed on any group of the third bolt and nut assembly.

[0010] A first lower flange is provided at the lower end of the upper insulating support, and a second upper flange is provided at the upper end of the lower insulating support. The first lower flange, the phase connecting plate and the second upper flange are fixedly connected by a second bolt and nut assembly, and the tail end of the first lower discharge gap rod and the tail end of the second upper discharge gap rod are fixed on any one group of the second bolt and nut assemblies.

[0011] The upper end of the upper lightning arrester is provided with a first upper electrode connected to the corresponding wiring terminal, and the lower end is provided with a first lower electrode connected to the upper end of the first conductive part arranged in the upper insulating support through a first stud, the lower end of the first conductive part is connected to the upper end of the second conductive part arranged in the lower insulating support through a second stud, the lower end of the second conductive part is connected to the second upper electrode arranged at the upper end of the lower lightning arrester through a third stud, and the lower end of the lower lightning arrester is provided with a second lower electrode connected to the grounding bolt.

[0012] The length of the upper discharge gap rod is different from the length of the lower discharge gap rod.

[0013] The upper discharge gap rod and the lower discharge gap rod are both round rod-shaped, and the discharge poles at the ends of the round rods are spherical.

[0014] The lower end of the lower lightning arrester is installed on a base, and the base includes a lightning arrester fixing plate and a bottom plate, wherein an upper insulating pad is provided on the upper side of the lightning arrester fixing plate, and a lower insulating pad is provided between the lightning arrester fixing plate and the bottom plate.

[0015] The advantages and positive effects of the present invention are:

[0016] 1. The present invention adopts a combination of three-column and six-section lightning arresters, which can not only limit the line phase-to-ground voltage, but also limit the phase-to-phase voltage, avoid phase-to-phase short circuit or phase-to-phase voltage increase, and protect power equipment from damage. The upper lightning arrester in each lightning arrester group is a phase-to-phase lightning arrester, and the lower lightning arrester is a phase-to-ground lightning arrester.

[0017] 2. Each phase arrester group of the present invention is provided with a double gap structure, namely, a phase-to-phase gap and a phase-to-ground gap, which can isolate the arrester from the power frequency voltage during operation. Neither the upper arrester nor the lower arrester is subjected to the power frequency voltage, which greatly reduces the aging rate of the arrester resistor and the deterioration rate of the outer jacket, and improves the service life and safety of the arrester.

[0018] 3. The connection between the upper lightning arrester, the upper insulating support, the lower insulating support, the lower lightning arrester and each discharge gap rod in each phase lightning arrester group of the present invention is not only simple and compact in structure, but also does not increase the volume of the equipment. After loosening the nuts in the corresponding bolt and nut assemblies, each upper discharge gap rod and lower discharge gap rod can be rotated around the bolts as needed to achieve gap adjustment, which also improves the flexibility of use of the present invention.

[0019] 4. The upper discharge gap rod and the lower discharge gap rod of the present invention are both made of round rod-shaped stainless steel material, and the end of the round rod adopts a stainless steel sphere as a discharge electrode. The discharge voltage is stable, and the upper discharge gap rod and the lower discharge gap rod have different lengths, which can effectively avoid the formation of a rain curtain and avoid false discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention,

[0021] Figure 2 for Figure 1 The enlarged view of K in the figure,

[0022] Figure 3 for Figure 1 Cross-sectional view of the connection between the middle and upper arrester and the upper insulating support.

[0023] Figure 4 for Figure 1 The cross-sectional view of the connection between the upper insulating support and the lower insulating support.

[0024] Figure 5 It is a schematic diagram of the connection principle of the present invention.

[0025] Among them, 1 is the A phase lightning arrester group, 101 is the upper lightning arrester, 1011 is the first lightning arrester flange, 102 is the upper insulating support, 1021 is the first upper flange, 1022 is the first upper discharge gap rod, 1023 is the first lower flange, 1024 is the first lower discharge gap rod, 103 is the lower insulating support, 1031 is the second upper flange, 1032 is the second upper discharge gap rod, 1033 is the second lower flange, 1034 is the second lower discharge gap rod, 104 is the lower lightning arrester, 1041 is the second lightning arrester flange, 1042 is the grounding bolt, 105 is the first bolt and nut assembly, 106 is the base, 1 061 is the upper insulating pad, 1062 is the arrester fixing plate, 1063 is the lower insulating pad, 1064 is the bottom plate, 2 is the B phase arrester group, 3 is the C phase arrester group, 4 is the first phase inter-wire bar, 5 is the second phase inter-wire bar, 6 is the third phase inter-wire bar, 7 is the first phase connecting plate, 8 is the second phase connecting plate, 9 is the third phase connecting plate, 10 is the high-voltage transmission wire, 11 is the upper terminal, 12 is the upper electrode, 13 is the arrester jacket, 14 is the insulating layer, 15 is the resistor, 16 is the core adjustment aluminum rod, 17 is the lower electrode, 18 is the insulating support jacket, 19 is the conductive part, and 20 is the second stud. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 5As shown, the present invention includes an A-phase lightning arrester group 1, a B-phase lightning arrester group 2 and a C-phase lightning arrester group 3, wherein the A-phase lightning arrester group 1, the B-phase lightning arrester group 2 and the C-phase lightning arrester group 3 have the same structure and all include an upper lightning arrester 101, an upper insulating support 102, a lower insulating support 103 and a lower lightning arrester 104 connected in sequence from top to bottom, wherein an interphase connecting plate is provided between the corresponding upper insulating support 102 and the lower insulating support 103, and an upper discharge gap rod and a lower discharge gap rod are provided on the upper side and the lower side of each interphase connecting plate, a discharge gap is formed between the upper discharge gap rod and the lower discharge gap rod, and as shown Figure 1 and Figure 5 As shown, the first interphase connecting plate 7 (point D) in the middle of the A-phase lightning arrester group 1 is connected to the upper terminal (point B) of the B-phase lightning arrester group 2 through the first interphase wiring row 4, the second interphase connecting plate 8 (point E) in the middle of the B-phase lightning arrester group 2 is connected to the upper terminal (point C) of the C-phase lightning arrester group 3 through the second interphase wiring row 5, and the third interphase connecting plate 9 (point F) in the middle of the C-phase lightning arrester group 3 is connected to the upper terminal (point A) at the upper end of the A-phase lightning arrester group 1 through the third interphase wiring row 6, and the lower ends of each phase lightning arrester group are grounded (points G, H, and I).

[0028] The present invention is composed of three-column six-section lightning arresters, which can not only limit the line phase-to-ground voltage, but also limit the phase-to-phase voltage, avoid phase-to-phase short circuit or phase-to-phase voltage increase, and protect power equipment from damage, wherein the upper lightning arrester 101 is a phase-to-phase lightning arrester, and the lower lightning arrester 104 is a phase-to-ground lightning arrester. In addition, each phase lightning arrester group is provided with a double gap structure, i.e., a phase-to-phase gap (between the first upper discharge gap rod 1022 and the first lower discharge gap rod 1024 on the upper side of the phase connecting plate) and a phase-to-ground gap (between the second upper discharge gap rod 1032 and the second lower discharge gap rod 1034 on the lower side of the phase connecting plate), which can isolate the lightning arrester from the power frequency voltage during operation, and neither the phase-to-phase lightning arrester (upper lightning arrester 101) nor the phase-to-ground lightning arrester (lower lightning arrester 104) is subjected to the power frequency voltage, which greatly reduces the aging speed of the lightning arrester resistor and the deterioration speed of the outer jacket, and improves the service life and safety of the lightning arrester.

[0029] like Figures 1-2 As shown, in this embodiment, the upper end of the upper insulating pillar 102 is provided with a first upper flange 1021, and the lower end is provided with a first lower flange 1023, wherein the first upper flange 1021 is fixedly connected to the first lightning arrester flange 1011 at the lower end of the upper lightning arrester 101, and the first lower flange 1023 is fixedly connected to the upper side of the corresponding phase connecting plate, and the first upper discharge gap rod 1022 is provided on the lower side of the first upper flange 1021, and the first lower discharge gap rod 1024 cooperating with the first upper discharge gap rod 1022 is provided on the upper side of the first lower flange 1023.

[0030] like Figures 1-2 As shown, in this embodiment, the upper end of the lower insulating support 103 is provided with a second upper flange 1031, and the lower end is provided with a second lower flange 1033, wherein the second upper flange 1031 is fixedly connected to the lower side of the corresponding phase-to-phase connecting plate, and the second lower flange 1033 is fixedly connected to the second lightning arrester flange 1041 at the upper end of the lower lightning arrester 104, and a second upper discharge gap rod 1032 is provided on the lower side of the second upper flange 1031, and a second lower discharge gap rod 1034 cooperating with the second upper discharge gap rod 1032 is provided on the upper side of the second lower flange 1033.

[0031] like Figures 1-2 As shown, in this embodiment, the length of the first upper discharge gap rod 1022 is less than the length of the first lower discharge gap rod 1024, and the length of the second lower discharge gap rod 1034 is less than the length of the second upper discharge gap rod 1032, which can effectively avoid the formation of a rain curtain and avoid mis-discharge.

[0032] like Figures 1-2 As shown, in this embodiment, the first arrester flange 1011 and the first upper flange 1021 are fixedly connected by the first bolt and nut assembly 105, and the tail end of the first upper discharge gap rod 1022 is fixed to the first bolt and nut assembly 105 of any group. By loosening the nut in the first bolt and nut assembly 105, the first upper discharge gap rod 1022 can rotate around the bolt to adjust the gap distance.

[0033] like Figures 1-2 As shown, in this embodiment, the first lower flange 1023, the phase connecting plate and the second upper flange 1031 are fixedly connected by a second bolt and nut assembly, and the tail end of the first lower discharge gap rod 1024 and the tail end of the second upper discharge gap rod 1032 are fixed to any group of the second bolt and nut assembly, and the first lower discharge gap rod 1024 and the second upper discharge gap rod 1032 can be rotated and adjusted by screwing the nuts in the second bolt and nut assembly.

[0034] like Figures 1-2 As shown, in this embodiment, the second lower flange 1033 and the second arrester flange 1041 are fixedly connected by a third bolt and nut assembly, and the tail end of the second lower discharge gap rod 1034 is fixed on any group of the third bolt and nut assembly.

[0035] like Figures 3-4As shown, in this embodiment, the upper arrester 101 and the lower arrester 104 in each phase arrester group have the same structure, which includes an arrester jacket 13 and an arrester core disposed in the arrester jacket 13, wherein the arrester core includes an upper electrode 12, a resistor 15, a core adjustment aluminum rod 16 and a lower electrode 17 arranged in sequence from top to bottom, the arrester jacket 13 is made of silicone, and an insulating layer 14 is provided between the arrester core and the arrester jacket 13, and in addition, Figures 3-4 As shown, in this embodiment, the upper insulating pillar 102 and the lower insulating pillar 103 have the same structure, and both include an insulating pillar jacket 18 made of silicone material and a conductive portion 19 disposed in the insulating pillar jacket 18. Figure 3 As shown, in this embodiment, the first upper electrode at the upper end of the upper arrester 101 is connected to the corresponding terminal 11, and the first lower electrode at the lower end is connected to the upper end of the first conductive part in the upper insulating support 102 through the first stud. Figure 4 As shown, the lower end of the first conductive part in the upper insulating support 102 is connected to the upper end of the second conductive part in the lower insulating support 103 through the second stud 20, and the lower end of the second conductive part is connected to the second upper electrode at the upper end of the lower lightning arrester 104 through the third stud. Figure 1 As shown, the second lower electrode at the lower end of the lower lightning arrester 104 is connected to the grounding bolt 1042 .

[0036] In addition, Figure 1 As shown, the lower end of the lower arrester 104 is mounted on a base 106, and the base 106 includes an arrester fixing plate 1062 and a bottom plate 1064, wherein an upper insulating pad 1061 is provided on the upper side of the arrester fixing plate 1062, and a lower insulating pad 1063 is provided between the arrester fixing plate 1062 and the bottom plate 1064. The base 106 can adopt the structure in the CN218849176U patent.

[0037] The working principle of the present invention is:

[0038] like Figure 1 and Figure 5 As shown, the present invention is composed of a three-column six-section lightning arrester combination, wherein the first interphase connecting plate 7 in the middle of the A-phase lightning arrester group 1 is connected to the upper terminal of the B-phase lightning arrester group 2 through the first phase inter-wire row 4, the second interphase connecting plate 8 in the middle of the B-phase lightning arrester group 2 is connected to the upper terminal of the C-phase lightning arrester group 3 through the second phase inter-wire row 5, the third interphase connecting plate 9 in the middle of the C-phase lightning arrester group 3 is connected to the upper terminal of the A-phase lightning arrester group 1, and the upper terminals of the upper ends of the lightning arrester groups of each phase are respectively connected to the corresponding high-voltage transmission wires 10, so that the present invention can not only limit the line phase-to-ground voltage, but also limit the phase-to-phase voltage, avoid phase-to-phase short circuit or phase-to-phase voltage increase, and protect power equipment from damage.

[0039] In addition, each phase arrester group of the present invention is provided with a double gap structure, i.e., an interphase gap formed between the first upper discharge gap rod 1022 and the first lower discharge gap rod 1024 on the upper side of the phase-to-phase connecting plate, and a phase-to-ground gap formed between the second upper discharge gap rod 1032 and the second lower discharge gap rod 1034 on the lower side of the phase-to-phase connecting plate, which can isolate the arrester from the power frequency voltage during operation, and neither the phase-to-phase arrester (upper arrester 101) nor the phase-to-ground arrester (lower arrester 104) is subjected to the power frequency voltage, which greatly reduces the aging rate of the arrester resistor and the deterioration rate of the outer jacket, thereby improving the service life and safety of the arrester.

[0040] In the present invention, the first lightning arrester flange 1011 at the lower end of the upper lightning arrester 101 and the first upper flange 1021 at the upper end of the upper insulating support 102 are fixedly connected by a first bolt and nut assembly 105, and the tail end of the first upper discharge gap rod 1022 is fixed to the first bolt and nut assembly 105 of any group, and the first lower flange 1023 at the lower end of the upper insulating support 102, the phase connecting plate and the second upper flange 1031 at the upper end of the lower insulating support 103 are fixedly connected by a second bolt and nut assembly, and the tail end of the first lower discharge gap rod 1024 and the tail end of the second upper discharge gap rod 1032 are fixed to the second bolt and nut assembly of any group, the second lower flange 1033 at the lower end of the lower insulating support 103 and the second lightning arrester flange 1041 at the upper end of the lower lightning arrester 104 are fixedly connected by a third bolt and nut assembly, and the tail end of the second lower discharge gap rod 1034 is fixed to the third bolt and nut assembly of any group. On the one hand, the above connection structure is simple and compact and will not increase the volume of the equipment. On the other hand, after loosening the nuts in the corresponding bolt and nut assemblies, each upper discharge gap rod and lower discharge gap rod can be rotated around the bolts as needed to adjust the gap, which improves the flexibility of use of the present invention.

[0041] The upper discharge gap rod and the lower discharge gap rod of the present invention have different lengths, which can effectively avoid the formation of a rain curtain and avoid erroneous discharge. In this embodiment, the upper discharge gap rod and the lower discharge gap rod are both made of round rod-shaped stainless steel material, and a stainless steel sphere is used as a discharge electrode at the end of the round rod, so that the discharge voltage is stable.

Claims

1. A combined gap type arrester system, characterized in that: The invention comprises an A-phase lightning arrester group (1), a B-phase lightning arrester group (2) and a C-phase lightning arrester group (3), wherein the A-phase lightning arrester group (1), the B-phase lightning arrester group (2) and the C-phase lightning arrester group (3) have the same structure and each comprises an upper lightning arrester (101), an upper insulating support (102), a lower insulating support (103) and a lower lightning arrester (104) connected in sequence from top to bottom, wherein an interphase connecting plate is provided between the corresponding upper insulating support (102) and the lower insulating support (103), and an upper discharge gap rod and a lower discharge gap rod are provided on the upper side and the lower side of each interphase connecting plate, and the upper discharge gap rod and the lower discharge gap rod are provided on the upper side and the lower side of each interphase connecting plate. A discharge gap is formed between the discharge gap rods; the interphase connection plate of the A-phase arrester group (1) is connected to the upper terminal of the B-phase arrester group (2) via a first interphase wiring bar (4); the interphase connection plate of the B-phase arrester group (2) is connected to the upper terminal of the C-phase arrester group (3) via a second interphase wiring bar (5); the interphase connection plate of the C-phase arrester group (3) is connected to the upper terminal of the upper end of the A-phase arrester group (1) via a third interphase wiring bar (6); and the lower end of the A-phase arrester group (1), the lower end of the B-phase arrester group (2) and the lower end of the C-phase arrester group (3) are all grounded.

2. The combined gap type lightning arrester system according to claim 1, characterized in that: The upper end of the upper insulating support (102) is provided with a first upper flange (1021), and the lower end is provided with a first lower flange (1023), wherein the first upper flange (1021) is fixedly connected to the first lightning arrester flange (1011) at the lower end of the upper lightning arrester (101), and the first lower flange (1023) is fixedly connected to the upper side of the corresponding phase connecting plate, and the lower side of the first upper flange (1021) is provided with a first upper discharge gap rod (1022), and the upper side of the first lower flange (1023) is provided with a first lower discharge gap rod (1024).

3. The combined gap type lightning arrester system according to claim 2, characterized in that: The first arrester flange (1011) and the first upper flange (1021) are fixedly connected via a first bolt and nut assembly (105), and the tail end of the first upper discharge gap rod (1022) is fixed to any group of the first bolt and nut assembly (105).

4. The combined gap type lightning arrester system according to claim 1, characterized in that: The upper end of the lower insulating support (103) is provided with a second upper flange (1031), and the lower end is provided with a second lower flange (1033), wherein the second upper flange (1031) is fixedly connected to the lower side of the corresponding phase-to-phase connecting plate, and the second lower flange (1033) is fixedly connected to the second lightning arrester flange (1041) at the upper end of the lower lightning arrester (104), and the lower side of the second upper flange (1031) is provided with a second upper discharge gap rod (1032), and the upper side of the second lower flange (1033) is provided with a second lower discharge gap rod (1034).

5. The combined gap type lightning arrester system according to claim 4, characterized in that: The second lower flange (1033) and the second arrester flange (1041) are fixedly connected by a third bolt and nut assembly, and the tail end of the second lower discharge gap rod (1034) is fixed on any group of the third bolt and nut assembly.

6. The combined gap type lightning arrester system according to claim 1, characterized in that: A first lower flange (1023) is provided at the lower end of the upper insulating support (102), and a second upper flange (1031) is provided at the upper end of the lower insulating support (103); the first lower flange (1023), the phase connection plate and the second upper flange (1031) are fixedly connected by a second bolt and nut assembly, and the tail end of the first lower discharge gap rod (1024) and the tail end of the second upper discharge gap rod (1032) are fixed to any one group of the second bolt and nut assemblies.

7. The combined gap type lightning arrester system according to claim 1, characterized in that: The upper end of the upper lightning arrester (101) is provided with a first upper electrode connected to the corresponding wiring terminal, and the lower end is provided with a first lower electrode connected to the upper end of a first conductive part arranged in the upper insulating support (102) through a first stud, the lower end of the first conductive part is connected to the upper end of a second conductive part arranged in the lower insulating support (103) through a second stud (20), the lower end of the second conductive part is connected to the second upper electrode arranged at the upper end of the lower lightning arrester (104) through a third stud, and the lower end of the lower lightning arrester (104) is provided with a second lower electrode connected to a grounding bolt (1042).

8. The combined gap type lightning arrester system according to claim 1, characterized in that: The length of the upper discharge gap rod is different from the length of the lower discharge gap rod.

9. The combined gap type lightning arrester system according to claim 8, characterized in that: The upper discharge gap rod and the lower discharge gap rod are both round rod-shaped, and the discharge poles at the ends of the round rods are spherical.

10. The combined gap type lightning arrester system according to claim 1, characterized in that: The lower end of the lower lightning arrester (104) is mounted on a base (106), and the base (106) comprises a lightning arrester fixing plate (1062) and a bottom plate (1064), wherein an upper insulating pad (1061) is provided on the upper side of the lightning arrester fixing plate (1062), and a lower insulating pad (1063) is provided between the lightning arrester fixing plate (1062) and the bottom plate (1064).

Images