Combined gap type lightning arrester system

Abstract

The utility model 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 interphase 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 utility model, the phase-to-ground voltage of a 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 utility model relates to a lightning arrester technical field, concretely is a combined gap type lightning arrester system. BACKGROUND

[0002] Metal oxide lightning arrester is mainly used for preventing the overvoltage of transmission line from damaging electrical equipment, but the lightning arrester in the prior art only provides single-phase protection, if the system line produces interphase overvoltage, then it cannot limit interphase voltage, this will lead to interphase short circuit or interphase voltage rise, damages power equipment.In addition, the existing lightning arrester has no gap, and each phase lightning arrester is installed in parallel on the transmission line, the high-voltage end is connected with the transmission line, and the low-voltage end is grounded, so each phase lightning arrester needs to bear the power frequency voltage at all times, which easily leads to the aging of the resistor sheet, reduces the service life of the product, and the lightning arrester cover is easily deteriorated under the influence of voltage, thereby causing flashover.For example, the patent CN201066763Y discloses a combined lightning arrester with composite resistance and capacitance, since the lightning arrester has no gap, the device includes three discharge gap units in addition to four lightning arrester units, one end of the three lightning arrester units is respectively connected with A, B and C phase lines of the protected equipment, the other end is respectively connected with 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 lightning arrester is connected with the common point, and the other end is grounded, in addition, the device also includes three resistance and capacitance units, the three resistance and capacitance units are respectively connected in parallel at both ends of the corresponding discharge gap unit. SUMMARY

[0003] The utility model discloses a combined gap type lightning arrester system, which can limit line-to-ground voltage and interphase voltage, avoid interphase short circuit or interphase voltage rise, protect power equipment from damage, and greatly reduce the aging speed of the lightning arrester resistor sheet and the deterioration speed of the cover, improve the service life and safety of the lightning arrester.

[0004] The utility model discloses a combined gap type lightning arrester system, which can limit line-to-ground voltage and interphase voltage, avoid interphase short circuit or interphase voltage rise, protect power equipment from damage, and greatly reduce the aging speed of the lightning arrester resistor sheet and the deterioration speed of the cover, improve the service life and safety of the lightning arrester.

[0005] The utility model provides a combined gap type lightning arrester system, including A phase lightning arrester group, B phase lightning arrester group and C phase lightning arrester group, A phase lightning arrester group, B phase lightning arrester group and C phase lightning arrester group are same in structure and all include the upper lightning arrester that is connected in turn by upper to lower, upper insulating pillar, lower insulating pillar and lower lightning arrester, wherein the upper insulating pillar and lower insulating pillar of corresponding are all equipped with phase-to-phase connecting plate, and the upper side and the lower side of every phase-to-phase connecting plate are equipped with upper discharge gap stick and lower discharge gap stick, and the upper discharge gap stick and lower discharge gap stick form discharge gap between, the phase-to-phase connecting plate of A phase lightning arrester group is connected with the upper terminal of B phase lightning arrester group through first phase-to-phase wire harness, the phase-to-phase connecting plate of B phase lightning arrester group is connected with the upper terminal of C phase lightning arrester group through second phase-to-phase wire harness, the phase-to-phase connecting plate of C phase lightning arrester group is connected with the upper terminal of A phase lightning arrester group upper end through third phase-to-phase wire harness, and the lower end of A phase lightning arrester group, the lower end of B phase lightning arrester group and the lower end of C phase lightning arrester group are all grounded.

[0006] The upper end of the upper insulating pillar is provided with a first upper flange, and the lower end is provided with a first lower flange, wherein the first upper flange is fixedly connected with a first lightning arrester flange at the lower end of the upper lightning arrester, the first lower flange is fixedly connected with the upper side of the corresponding phase-to-phase connecting plate, and the lower side of the first upper flange is provided with a first upper discharge gap stick, and the upper side of the first lower flange is provided with a first lower discharge gap stick.

[0007] The first lightning arrester flange and the first upper flange are fixedly connected through a first bolt-nut assembly, and the tail end of the first upper discharge gap stick is fixed on any one of the first bolt-nut assemblies.

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

[0009] The second lower flange and the second lightning arrester flange are fixedly connected through a third bolt-nut assembly, and the tail end of the second lower discharge gap stick is fixed on any one of the third bolt-nut assemblies.

[0010] The lower end of the upper insulating pillar is provided with a first lower flange, the upper end of the lower insulating pillar is provided with a second upper flange, the first lower flange, the phase-to-phase connecting plate and the second upper flange are fixedly connected through a second bolt-nut assembly, and the tail end of the first lower discharge gap stick and the tail end of the second upper discharge gap stick are fixed on any one of the second bolt-nut assemblies.

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

[0012] The upper discharge gap rod and the lower discharge gap rod are different in length.

[0013] The upper discharge gap rod and the lower discharge gap rod are both in the form of a round rod, and the discharge electrode at the end of the round rod is in the form of a ball.

[0014] The lower end of the lower lightning arrester is mounted on a base, the base comprises a lightning arrester fixing plate and a bottom plate, the upper side of the lightning arrester fixing plate is provided with an upper insulating pad, and the lightning arrester fixing plate and the bottom plate are provided with a lower insulating pad.

[0015] The utility model has the advantages and positive effects that:

[0016] 1. The utility model adopts three-column six-section lightning arrester combination, which can not only limit the line-to-ground voltage, but also limit the phase-to-phase voltage, avoid phase-to-phase short circuit or phase-to-phase voltage rise, and protect the power equipment from being damaged, wherein 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 lightning arrester group of the utility model is provided with a double-gap structure, i.e. a phase-to-phase gap and a phase-to-ground gap, which can isolate the power frequency voltage when the lightning arrester operates, neither the upper lightning arrester nor the lower lightning arrester bears the power frequency voltage, which greatly reduces the aging speed of the lightning arrester resistor sheet and the degradation speed of the outer sleeve, and improves the service life and safety of the lightning arrester.

[0018] 3. The connection of 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 utility model is not only simple and compact in structure, but also does not increase the size of the equipment, after the nut in the corresponding bolt nut assembly is loosened, each upper discharge gap rod and lower discharge gap rod can be rotated around the bolt to realize gap adjustment according to the needs, which also improves the use flexibility of the utility model.

[0019] 4. The upper discharge gap rod and the lower discharge gap rod of the utility model are both made of round rod type stainless steel material, and the end of the round rod is provided with a stainless steel ball as a discharge electrode, the discharge voltage is stable, and the upper discharge gap rod and the lower discharge gap rod are different in length, which can effectively avoid the formation of a rain curtain and prevent misdischarge. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model,

[0021] Figure 2 It is Figure 1 The enlarged view at K in the figure,

[0022] Figure 3 It is Figure 1 The connection sectional view of the upper lightning arrester and the upper insulating pillar in the figure,

[0023] Figure 4 It is Figure 1 The connection sectional view of the upper insulating pillar and the lower insulating pillar in the figure,

[0024] Figure 5 It is a connection principle schematic view of the utility model.

[0025] Wherein, 1 is A-phase lightning arrester group, 101 is upper lightning arrester, 1011 is first lightning arrester flange, 102 is upper insulating pillar, 1021 is first upper flange, 1022 is first upper discharge gap rod, 1023 is first lower flange, 1024 is first lower discharge gap rod, 103 is lower insulating pillar, 1031 is second upper flange, 1032 is second upper discharge gap rod, 1033 is second lower flange, 1034 is second lower discharge gap rod, 104 is lower lightning arrester, 1041 is second lightning arrester flange, 1042 is grounding bolt, 105 is first bolt nut assembly, 106 is base, 1061 is upper insulating pad, 1062 is lightning arrester fixing plate, 1063 is lower insulating pad, 1064 is bottom plate, 2 is B-phase lightning arrester group, 3 is C-phase lightning arrester group, 4 is first phase-to-phase wire row, 5 is second phase-to-phase wire row, 6 is third phase-to-phase wire row, 7 is first phase-to-phase connecting plate, 8 is second phase-to-phase connecting plate, 9 is third phase-to-phase connecting plate, 10 is high-voltage transmission wire, 11 is upper connecting terminal, 12 is upper electrode, 13 is lightning arrester outer sleeve, 14 is insulating layer, 15 is resistance sheet, 16 is core body adjusting aluminum rod, 17 is lower electrode, 18 is insulating pillar outer sleeve, 19 is conductive part, 20 is second stud. DETAILED DESCRIPTION

[0026] The utility model will be further described in connection with the drawings.

[0027] For example, Figures 1-5As shown, this utility model includes an A-phase surge arrester group 1, a B-phase surge arrester group 2, and a C-phase surge arrester group 3. The A-phase surge arrester group 1, B-phase surge arrester group 2, and C-phase surge arrester group 3 have identical structures and each includes an upper surge arrester 101, an upper insulating support 102, a lower insulating support 103, and a lower surge arrester 104 connected sequentially from top to bottom. A phase-to-phase connecting plate is provided between the corresponding upper insulating support 102 and lower insulating support 103. Each phase-to-phase connecting plate has an upper discharge gap rod and a lower discharge gap rod on its upper and lower sides, forming a discharge gap between the upper and lower discharge gap rods. Figure 1 and Figure 5 As shown, the first phase-to-phase connecting plate 7 (point D) in the middle of the A-phase surge arrester group 1 is connected to the upper terminal (point B) of the B-phase surge arrester group 2 through the first phase-to-phase connecting line 4. The second phase-to-phase connecting plate 8 (point E) in the middle of the B-phase surge arrester group 2 is connected to the upper terminal (point C) of the C-phase surge arrester group 3 through the second phase-to-phase connecting line 5. The third phase-to-phase connecting plate 9 (point F) in the middle of the C-phase surge arrester group 3 is connected to the upper terminal (point A) at the top of the A-phase surge arrester group 1 through the third phase-to-phase connecting line 6. The lower ends of each phase surge arrester group are grounded (points G, H, and I).

[0028] This utility model uses a three-column, six-section surge arrester assembly, which can limit both phase-to-ground voltage and phase-to-phase voltage, preventing phase-to-phase short circuits or voltage spikes and protecting power equipment from damage. The upper surge arrester 101 is a phase-to-phase arrester, and the lower surge arrester 104 is a phase-to-ground arrester. Each phase arrester assembly is equipped with a double-gap structure: a phase-to-phase gap (between the first upper discharge gap bar 1022 and the first lower discharge gap bar 1024 on the upper side of the phase-to-phase connecting plate) and a phase-to-ground gap (between the second upper discharge gap bar 1032 and the second lower discharge gap bar 1034 on the lower side of the phase-to-phase connecting plate). This allows the arresters to isolate power frequency voltage during operation. Neither the phase-to-phase arrester (upper surge arrester 101) nor the phase-to-ground arrester (lower surge arrester 104) withstands power frequency voltage. This significantly reduces the aging rate of the arrester's resistor elements and the deterioration rate of its outer casing, improving the arrester's service life and safety.

[0029] like Figures 1-2 As shown, in this embodiment, the upper insulating support 102 is provided with a first upper flange 1021 at its upper end and a first lower flange 1023 at its lower end. The first upper flange 1021 is fixedly connected to the first surge arrester flange 1011 at the lower end of the upper surge arrester 101, and the first lower flange 1023 is fixedly connected to the upper side of the corresponding phase-to-phase connecting plate. The lower side of the first upper flange 1021 is provided with a first upper discharge gap bar 1022, and the upper side of the first lower flange 1023 is provided with a first lower discharge gap bar 1024 that cooperates with the first upper discharge gap bar 1022.

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

[0031] As Figures 1-2 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, so as to effectively avoid the formation of rain curtain and avoid mis-discharge.

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

[0033] As Figures 1-2 shown, in this embodiment, the first lower flange 1023, the inter-phase connecting plate and the second upper flange 1031 are fixedly connected by a second bolt-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 on any one of the second bolt-nut assemblies, and by rotating the nut in the second bolt-nut assembly, the rotation adjustment of the first lower discharge gap rod 1024 and the second upper discharge gap rod 1032 can be realized.

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

[0035] As Figures 3-4As shown, in the embodiment, the upper lightning arrester 101 and the lower lightning arrester 104 in each phase lightning arrester group are the same in structure, and each includes a lightning arrester outer sleeve 13 and a lightning arrester core in the lightning arrester outer sleeve 13, wherein the lightning arrester core includes an upper electrode 12, a resistance sheet 15, a core adjusting aluminum rod 16 and a lower electrode 17 arranged in sequence from top to bottom, the lightning arrester outer sleeve 13 is made of silica gel, and an insulating layer 14 is arranged between the lightning arrester core and the lightning arrester outer sleeve 13, and in addition, as shown in the figure, Figures 3-4 As shown, in the embodiment, the upper insulating pillar 102 and the lower insulating pillar 103 are also the same in structure, and each includes a silica gel insulating pillar outer sleeve 18 and a conductive part 19 arranged in the insulating pillar outer sleeve 18. Figure 3 As shown, in the embodiment, the first upper electrode at the upper end of the upper lightning arrester 101 is connected with the corresponding wiring terminal 11, and the first lower electrode at the lower end is connected with the upper end of the first conductive part in the upper insulating pillar 102 through a first stud, and as shown in the figure, Figure 4 As shown, the lower end of the first conductive part in the upper insulating pillar 102 is connected with the upper end of the second conductive part in the lower insulating pillar 103 through a second stud 20, the lower end of the second conductive part is connected with the second upper electrode at the upper end of the lower lightning arrester 104 through a third stud, and as shown in the figure, Figure 1 As shown, the second lower electrode at the lower end of the lower lightning arrester 104 is connected with a grounding bolt 1042.

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

[0037] The working principle of the utility model is as follows:

[0038] As shown in the figure, Figure 1 and Figure 5As shown, the utility model discloses three column six section lightning arrester combination, wherein the first phase-to-phase connecting plate 7 of A phase lightning arrester group 1 is connected with the upper connection terminal of B phase lightning arrester group 2 through the first phase-to-phase wire harness 4, the second phase-to-phase connecting plate 8 of B phase lightning arrester group 2 is connected with the upper connection terminal of C phase lightning arrester group 3 through the second phase-to-phase wire harness 5, the third phase-to-phase connecting plate 9 of C phase lightning arrester group 3 is connected with the upper connection terminal of A phase lightning arrester group 1 upper end, and the upper connection terminal of each phase lightning arrester group upper end is connected with corresponding high-voltage transmission conductor 10, so that the utility model not only can limit line phase ground voltage, but also can limit phase-to-phase voltage, avoid phase-to-phase short circuit or phase-to-phase voltage rise, and protect power equipment from being damaged.

[0039] In addition, each phase lightning arrester group of the utility model is provided with double-gap structure, that is, the phase-to-phase 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 the 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 power frequency voltage when the lightning arrester is running, and neither the phase-to-phase lightning arrester (upper lightning arrester 101) nor the phase-to-ground lightning arrester (lower lightning arrester 104) bears the power frequency voltage, which greatly reduces the aging speed of the lightning arrester resistor sheet and the deterioration speed of the outer sleeve, and improves the service life and safety of the lightning arrester.

[0040] The first lightning arrester flange 1011 of the upper lightning arrester 101 lower end and the first upper flange 1021 of the upper insulating support 102 upper end are fixedly connected through the first bolt and nut assembly 105, and the tail end of the first upper discharge gap rod 1022 is fixed on any one group of the first bolt and nut assembly 105, the first lower flange 1023 of the lower end of the upper insulating support 102, the phase-to-phase connecting plate and the second upper flange 1031 of the upper end of the lower insulating support 103 are fixedly connected through the 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 on any one group of the second bolt and nut assembly, the second lower flange 1033 of the lower end of the lower insulating support 103 and the second lightning arrester flange 1041 of the upper end of the lower lightning arrester 104 are fixedly connected through the third bolt and nut assembly, and the tail end of the second lower discharge gap rod 1034 is fixed on any one group of the third bolt and nut assembly. The above-mentioned connecting structure is simple and compact on the one hand, and will not increase the volume of the equipment, and on the other hand, after loosening the nut in the corresponding bolt and nut assembly, each upper discharge gap rod and lower discharge gap rod can be rotated around the bolt to realize gap adjustment according to the needs, which improves the use flexibility of the utility model.

[0041] The upper discharge gap rod and the lower discharge gap rod are different in length, which can effectively avoid forming a rain curtain and avoiding mis-discharge, in the embodiment, the upper discharge gap rod and the lower discharge gap rod are both made of round bar type stainless steel material, and the round bar end part adopts a stainless steel ball as a discharge electrode, and the discharge voltage is stable.

Claims

1. A combined gap type surge arrester system, characterized by: The application relates to a three-phase lightning arrester, which 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) are identical in structure and each comprises, from top to bottom, an upper lightning arrester (101), an upper insulating support (102), a lower insulating support (103) and a lower lightning arrester (104), wherein an inter-phase connecting plate is arranged 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 arranged on the upper side and the lower side of each inter-phase connecting plate, a discharge gap is formed between the upper discharge gap rod and the lower discharge gap rod, the inter-phase connecting plate of the A-phase lightning arrester group (1) is connected with the upper connecting terminal of the B-phase lightning arrester group (2) through a first inter-phase connecting terminal row (4), the inter-phase connecting plate of the B-phase lightning arrester group (2) is connected with the upper connecting terminal of the C-phase lightning arrester group (3) through a second inter-phase connecting terminal row (5), the inter-phase connecting plate of the C-phase lightning arrester group (3) is connected with the upper connecting terminal of the A-phase lightning arrester group (1) through a third inter-phase connecting terminal row (6), and the lower end of the A-phase lightning arrester group (1), the lower end of the B-phase lightning arrester group (2) and the lower end of the C-phase lightning arrester group (3) are grounded.

2. The combined gap type surge arrester system according to claim 1, characterized by: 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 with a first lightning arrester flange (1011) at the lower end of the upper lightning arrester (101), the first lower flange (1023) is fixedly connected with the upper side of the corresponding inter-phase connecting plate, 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 surge arrester system according to claim 2, characterized by: The first lightning arrester flange (1011) and the first upper flange (1021) are fixedly connected through a first bolt-nut assembly (105), and the tail end of the first upper discharge gap rod (1022) is fixed on any one of the first bolt-nut assemblies (105).

4. The combined gap type surge arrester system according to claim 2, characterized by: 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 with the lower side of the corresponding inter-phase connecting plate, the second lower flange (1033) is fixedly connected with a second lightning arrester flange (1041) at the upper end of the lower lightning arrester (104), 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 surge arrester system according to claim 4, characterized by: The second lower flange (1033) and the second lightning arrester flange (1041) are fixedly connected through a third bolt-nut assembly, and the tail end of the second lower discharge gap rod (1034) is fixed on any one of the third bolt-nut assemblies.

6. The combined gap type surge arrester system according to claim 4, characterized by: The upper end of the upper insulating pillar (102) is provided with a first lower flange (1023), the upper end of the lower insulating pillar (103) is provided with a second upper flange (1031), the first lower flange (1023), the interphase connecting plate and the second upper flange (1031) are fixedly connected through a second bolt-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 on any one of the second bolt-nut assemblies.

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

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

9. The combined gap type surge arrester system according to claim 8, characterized by: The upper discharge gap rod and the lower discharge gap rod are both in the form of a round rod, and the discharge electrode at the end of the round rod is in the form of a sphere.

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

Images