Line lightning arrester

Abstract

The line lightning arrester comprises a core body assembly and a composite jacket, the core body assembly is installed in the composite jacket so that the core body assembly can be sealed and protected through the composite jacket, the core body assembly comprises a resistor core and at least three insulating rods, the axial direction of the resistor core is parallel to the axial directions of the insulating rods, and the insulating rods are arranged in the resistor core. According to the technical scheme, the at least three insulating rods are sequentially attached to the periphery of the resistor core and are fixedly connected with the resistor core, so that the resistor core is supported and fixed through the at least three insulating rods to form a core body assembly with higher strength, the vibration resistance of the line lightning arrester is improved, and stable operation of the line lightning arrester is ensured.

Description

Technical Field

[0001] This application relates to the field of surge arrester technology, and more specifically, to a line surge arrester. Background Technology

[0002] Line surge arresters are used to limit lightning overvoltages on power lines and protect lines and other electrical equipment from damage caused by lightning or other overvoltages. Existing line surge arresters typically use materials such as ceramics and glass as core components (core assemblies). Since line surge arresters are usually installed on transmission towers, these ceramic and glass core components are prone to cracking or damage under vibration, leading to arrester failure.

[0003] In summary, how to improve the vibration resistance of line surge arresters to ensure their stable operation is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a line surge arrester that improves the vibration resistance of the line surge arrester to ensure its stable operation.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A line surge arrester includes: a core assembly and a composite jacket; wherein the core assembly is installed inside the composite jacket, the core assembly includes a resistive core and an insulating rod; the axial direction of the resistive core is parallel to the axial direction of the insulating rod, there are at least three insulating rods, the at least three insulating rods are sequentially attached to the outer periphery of the resistive core, and the at least three insulating rods are fixedly connected to the resistive core.

[0007] In some embodiments, a first unit and a second unit are included; the core assembly includes a first core assembly and a second core assembly; the composite jacket includes a first composite jacket and a second composite jacket; the first unit includes a first core assembly and a first composite jacket, and the second unit includes a second core assembly and a second composite jacket; the first unit and the second unit are fixedly connected, and the first unit and the second unit are distributed sequentially along the axial direction of the core assembly.

[0008] In some embodiments, the structure of the first core assembly is consistent with the structure of the second core assembly; the first core assembly includes a first resistive core and at least three first insulating rods, the first end of the first resistive core and the first ends of the at least three first insulating rods are fixedly connected by a first fastener, and the second end of the first resistive core and the second ends of the at least three first insulating rods are fixedly connected by a second fastener.

[0009] In some embodiments, the first composite jacket includes a first insulating cylinder, a first flange, and a second flange; the first flange is fixedly connected to a port at a first end of the first insulating cylinder, and the second flange is fixedly connected to a port at a second end of the first insulating cylinder, wherein the first insulating cylinder is a cylinder of equal diameter; the second composite jacket includes a second insulating cylinder, a third flange, and a fourth flange; the third flange is fixedly connected to a port at a first end of the second insulating cylinder, and the fourth flange is fixedly connected to a port at a second end of the second insulating cylinder, wherein the second insulating cylinder includes a narrow section and a wide section, the diameter of the narrow section being smaller than the diameter of the wide section, and the narrow section and the wide section being distributed sequentially from the first end of the second insulating cylinder to the second end of the second insulating cylinder.

[0010] In some embodiments, both the first flange and the second flange are bonded to the first insulating cylinder; and / or, both the third flange and the fourth flange are bonded to the second insulating cylinder.

[0011] In some embodiments, a connecting plate is provided between the second flange and the third flange, and the second flange, the connecting plate and the third flange are fixedly connected by threaded fasteners; the fourth flange is used to fix the transmission tower.

[0012] In some embodiments, the system further includes suspension insulators, of which at least two are provided. One end of each suspension insulator is fixedly connected to the connecting plate, and the other end is fixedly connected to the transmission tower. The axial direction of the suspension insulator is at an angle to the axial direction of the core assembly.

[0013] In some embodiments, the first unit further includes a first sealing plate and a second sealing plate; the first sealing plate is fixedly connected to and seals a first end of the first insulating cylinder, and the second sealing plate is fixedly connected to and seals a second end of the first insulating cylinder; the second unit further includes a third sealing plate and a fourth sealing plate; the third sealing plate is fixedly connected to and seals a first end of the second insulating cylinder, and the fourth sealing plate is fixedly connected to and seals a second end of the second insulating cylinder.

[0014] In some embodiments, one of the second sealing plate and the first core assembly has a groove and the other has a boss, so that the first core assembly and the second sealing plate are positioned and engaged; the fourth sealing plate and one of the second core assembly have a groove and the other has a boss, so that the second core assembly and the fourth sealing plate are positioned and engaged.

[0015] In some embodiments, the insulating rod is made of epoxy glass fiber.

[0016] The line surge arrester provided in this application includes a core assembly and a composite jacket. The core assembly is installed inside the composite jacket to provide sealed protection for the core assembly. The core assembly includes a resistive core and at least three insulating rods. The axial direction of the resistive core is parallel to the axial direction of the insulating rods, so that the at least three insulating rods are sequentially attached to the outer periphery of the resistive core and fixedly connected to the resistive core. In this way, the resistive core is supported and fixed by at least three insulating rods to form a core assembly with higher strength, which improves the vibration resistance of the line surge arrester and ensures the stable operation of the line surge arrester. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the line surge arrester provided in an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 11-First core assembly, 111-First resistor core, 112-First insulating rod, 113-First fixing component, 114-Second fixing component, 12-First composite outer jacket, 121-First insulating cylinder, 122-First flange, 123-Second flange, 13-First sealing plate, 131-First spring, 14-Second sealing plate;

[0021] 21-Second core assembly, 211-Second resistor core, 212-Second insulating rod, 213-Third fixing component, 214-Fourth fixing component, 22-Second composite outer jacket, 221-Second insulating cylinder, 222-Third flange, 223-Fourth flange, 23-Third sealing plate, 231-Second spring, 24-Fourth sealing plate;

[0022] 30-Connecting plate;

[0023] 40 - Suspension insulator. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0027] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0028] The terms "parallel" and "perpendicular" used in this application refer to "basically parallel" and "basically perpendicular" in practical operation. "Basically parallel" can be understood as parallelism with a certain degree of error, and similarly, "basically perpendicular" can be understood as perpendicularity with a certain degree of error.

[0029] like Figure 1As shown in the embodiment of this application, the line surge arrester includes a core assembly and a composite outer casing. The core assembly is installed inside the composite outer casing to provide sealed protection for the core assembly. The core assembly includes a resistive core and insulating rods, with the axial direction of the resistive core parallel to the axial direction of the insulating rods. There are at least three insulating rods, which are sequentially attached to the outer periphery of the resistive core and fixedly connected to it. In this way, the resistive core is supported and fixed by at least three insulating rods to form a core assembly with higher strength, improving the vibration resistance of the line surge arrester and ensuring its stable operation.

[0030] To facilitate the installation of line surge arresters, the line surge arrester provided in this application embodiment includes a first unit and a second unit. The first unit and the second unit are separate structures, and both the first unit and the second unit include a core assembly and a composite outer casing.

[0031] like Figure 1 As shown, the first unit includes a first core assembly 11 and a first composite jacket 12, and the second unit includes a second core assembly 21 and a second composite jacket 22. The first unit and the second unit are fixedly connected, so that the first unit and the second unit are distributed sequentially along the axial direction of the core assembly to form a complete line surge arrester.

[0032] The first core assembly 11 includes a first resistive core 111 and at least three first insulating rods 112. The at least three first insulating rods 112 are sequentially attached to the first resistive core 111, and the first end of the first resistive core 111 and the first end of the at least three first insulating rods 112 are fixedly connected by a first fixing member 113. The second end of the first resistive core 111 and the second end of the at least three first insulating rods 112 are fixedly connected by a second fixing member 114, so that the first resistive core 111 and the at least three first insulating rods 112 are fixed to form the first core assembly 11. The at least three first insulating rods 112 provide support and fixation for the first resistive core 111, thereby improving the strength of the first core assembly 11.

[0033] In some embodiments, the first insulating rod 112 can be three, four, five, etc., which can be selected according to actual needs. This application embodiment does not limit this.

[0034] In some embodiments, the first fixing member 113 can be a fixing plate, with through holes provided on the fixing plate for the first resistance core 111 and the first insulating rod 112 to pass through, so that the fixing plate can fix the first resistance core 111 and the first insulating rod 112. The second fixing member 114 can also be a fixing plate, which will not be described in detail here.

[0035] The structure of the second core assembly 21 is consistent with that of the first core assembly 11. The second core assembly 21 includes a second resistive core 211 and at least three second insulating rods 212. The at least three second insulating rods 212 are sequentially attached to the second resistive core 211, and the first end of the second resistive core 211 and the first end of the at least three second insulating rods 212 are fixedly connected by a third fixing member 213. The second end of the second resistive core 211 and the second end of the at least three second insulating rods 212 are fixedly connected by a fourth fixing member 214, so that the second resistive core 211 and the at least three second insulating rods 212 are fixedly formed to form the second core assembly 21. The at least three second insulating rods 212 provide support and fixation for the second resistive core 211, thereby improving the strength of the second core assembly 21.

[0036] In some embodiments, the second insulating rod 212 can be three, four, five, etc., which can be selected according to actual needs. This application embodiment does not limit this.

[0037] In some embodiments, the third fixing member 213 can be a fixing plate, with through holes provided on the fixing plate for the second resistor core 211 and the second insulating rod 212 to pass through, so that the fixing plate can fix the first resistor core 111 and the second insulating rod 212. The fourth fixing member 214 can also be a fixing plate, which will not be described in detail here.

[0038] In some embodiments, the first insulating rod 112 and the second insulating rod 212 are both made of epoxy glass fiber, which improves the strength of the first insulating rod 112 and the second insulating rod 212, and further improves the strength of the first core assembly 11 and the second core assembly 21, so as to further improve the vibration resistance of the line surge arrester.

[0039] After the first core component 11 and the second core component 21 are assembled and fixed, they need to be installed into the interior of the first composite jacket 12 and the second composite jacket 22, respectively.

[0040] like Figure 1 As shown, the first composite outer sleeve 12 includes a first insulating cylinder 121, a first flange 122, and a second flange 123; the first flange 122 is fixedly connected to the port of the first end of the first insulating cylinder 121, and the second flange 123 is fixedly connected to the port of the second end of the first insulating cylinder 121, and the first insulating cylinder 121 is a cylinder of equal diameter.

[0041] In practice, the diameter of the first insulating cylinder 121 is just enough to allow the first core assembly 11 to enter the first insulating cylinder 121 along its axial direction. This allows the first core assembly 11 to minimize the gap between itself and the inner wall of the first insulating cylinder 121 after it is installed inside. This reduces the overall volume of the first unit, improves the convenience of the line surge arrester installation process, and thus improves installation efficiency.

[0042] In some embodiments, the first flange 122 and the second flange 123 are both bonded to the first insulating cylinder 121. This makes the first composite jacket 12 a pre-fixed whole, reducing the connection process between the first flange 122, the second flange 123 and the first insulating cylinder 121 during installation, improving the convenience of the line arrester installation process and further improving the installation efficiency. In addition, the bonding method improves the strength of the first composite jacket 12 and further improves the vibration resistance of the line arrester.

[0043] It should be noted that, as Figure 1 As shown, in the first insulating cylinder 121, the end away from the connecting plate 30 is the first end, and the end close to the connecting plate 30 is the second end; in the second insulating cylinder 221, the end close to the connecting plate 30 is the first end, and the first end away from the connecting plate 30 is the second end.

[0044] like Figure 1 As shown, the second composite jacket 22 includes a second insulating cylinder 221, a third flange 222, and a fourth flange 223; the third flange 222 is fixedly connected to the port at the first end of the second insulating cylinder 221, and the fourth flange 223 is fixedly connected to the port at the second end of the second insulating cylinder 221; since the second unit is located at the bottom of the first unit, in order to ensure the overall stability of the line surge arrester, the second insulating cylinder 221 includes a narrow section and a wide section. The diameter of the narrow section is smaller than the diameter of the wide section, and the narrow section and the wide section are distributed sequentially from the first end of the second insulating cylinder 221 to the second end of the second insulating cylinder 221, so that the second insulating cylinder 221 is in the shape of a tower, which improves the overall stability of the line surge arrester.

[0045] In practice, in order to reduce the overall size of the line surge arrester, the diameter of the port at the first end of the second insulating cylinder 221 is the same as the diameter of the first insulating cylinder 121, so that the second core assembly 21 can just enter the interior of the second insulating cylinder 221 from the first end of the second insulating cylinder 221. This reduces the overall size of the second unit, improves the convenience of the line surge arrester installation process, and thus improves the installation efficiency.

[0046] In some embodiments, both the third flange 222 and the fourth flange 223 are bonded to the second insulating cylinder 221. This makes the second composite jacket 22 a pre-fixed whole, reducing the connection process between the third flange 222, the fourth flange 223 and the second insulating cylinder 221 during installation, improving the convenience of the line arrester installation process, and further improving the installation efficiency. In addition, the bonding method improves the strength of the second composite jacket 22, further improving the vibration resistance of the line arrester.

[0047] In some embodiments, the first insulating cylinder 121 and the second insulating cylinder 221 are both made of epoxy resin and glass fiber composite material, which further improves the strength of the first insulating cylinder 121 and the second insulating cylinder 221, thereby improving the vibration resistance of the line surge arrester.

[0048] In some other embodiments, the first flange 122, the second flange 123, the third flange 222, and the fourth flange 223 are all made of hot-dip galvanized steel, which can improve wear resistance and corrosion resistance, and extend the service life of the first composite jacket 12 and the second composite jacket 22.

[0049] In order to seal and protect the first core assembly 11, such as Figure 1 As shown, the first composite jacket 12 is also connected to a first sealing plate 13 and a second sealing plate 14; the first sealing plate 13 is fixedly connected to and can seal the first end of the first insulating cylinder 121, and the second sealing plate 14 is fixedly connected to and can seal the second end of the first insulating cylinder 121, so as to seal and protect the first core assembly 11 and ensure the stable operation of the line surge arrester.

[0050] During installation, in order to position and fix the first core assembly 11, the second sealing plate 14 and the first core assembly 11 have a groove and a boss respectively. Through the cooperation of the groove and the boss, the first core assembly 11 is positioned and fixed inside the first insulating cylinder 121 to improve the stability of the line surge arrester during operation.

[0051] In some embodiments, in order to further secure the first core assembly 11, the first sealing plate 13 is fixedly connected to a first spring 131, so that the first spring 131 can abut against the first core assembly 11, further securing the first core assembly 11 and further improving the stability of the line surge arrester during operation.

[0052] Similarly, in order to seal and protect the second core assembly 21, such as Figure 1 As shown, the second composite jacket 22 is also connected to a third sealing plate 23 and a fourth sealing plate 24. The third sealing plate 23 is fixedly connected to and can seal the first end of the second insulating cylinder 221, and the fourth sealing plate 24 is fixedly connected to and can seal the second end of the second insulating cylinder 221, so as to seal and protect the second core assembly 21 and ensure the stable operation of the line surge arrester.

[0053] During installation, in order to position and fix the second core assembly 21, one of the fourth sealing plate 24 and the second core assembly 21 has a groove, and the other has a boss. Through the cooperation of the groove and the boss, the second core assembly 21 is positioned and fixed inside the second insulating cylinder 221, so as to improve the stability of the line surge arrester during operation.

[0054] In some embodiments, in order to further secure the second core assembly 21, a second spring 231 is fixedly connected to the third sealing plate 23, so that the second spring 231 can abut against the second core assembly 21, further securing the second core assembly 21 and further improving the stability of the line surge arrester during operation.

[0055] During installation, after assembling the first unit and the second unit, the second unit is fixedly connected to the transmission tower via the fourth flange 223. A connecting plate 30 is placed on the top of the third flange 222. Then, the first unit is placed on the connecting plate 30 and corresponds to the second unit. The second flange 123, the connecting plate 30 and the third flange 222 are fixedly connected by threaded fasteners, so that the first unit and the second unit are fixedly connected.

[0056] To further improve the vibration resistance of line surge arresters, such as Figure 1 As shown in the embodiment of this application, the line surge arrester also includes suspension insulators 40. There are at least two suspension insulators 40. One end of the suspension insulator 40 is fixedly connected to the connecting plate 30, and the other end of the suspension insulator 40 is fixedly connected to the transmission tower. The axial direction of each suspension insulator 40 is at an angle to the axial direction of the core assembly. In this way, the diagonal tension of at least two suspension insulators 40 further improves the overall stability of the line surge arrester and enhances its vibration resistance.

[0057] In some embodiments, there may be two, three, four, etc., suspension insulators 40, but this application does not limit this.

[0058] In some embodiments, the suspension insulator 40 is made of epoxy resin and glass fiber composite material, which can improve the strength of the suspension insulator 40 and further improve the stability of the line surge arrester.

[0059] In the installation process of the line surge arrester provided in this application embodiment, the first core assembly 11 and the second core assembly 21 are first assembled and fixed respectively. Then, the fourth sealing plate 24 is fixedly connected to the second end of the second insulating cylinder 221, and the second composite outer sleeve 22 is fixed to the transmission tower through the fourth flange 223. Then, the second core assembly 21 is installed into the interior of the second insulating cylinder 221 along the first end of the second insulating cylinder 221, and the second core assembly 21 is positioned and fixed by the groove and boss cooperation between the fourth sealing plate 24. Then, the third sealing plate 23 is fixedly connected to the first end of the second insulating cylinder 221 to seal the second core assembly 21. Then, the connecting plate 30 is placed on the top of the third flange 222. Then, the first insulating cylinder 11 with the second sealing plate 14 installed is installed... 21 is placed on the connecting plate 30 and corresponds to the second unit. The second flange 123, the connecting plate 30 and the third flange 222 are fixedly connected by threaded fasteners, so that the first insulating cylinder 121 and the second unit are fixedly connected. Then, the first core assembly 11 is installed into the inside of the first insulating cylinder 121, and the first core assembly 11 is positioned and fixed by the groove and boss between the second sealing plate 14. Then, the first sealing plate 13 is fixedly connected to the first end of the first insulating cylinder 121 to seal the first core assembly 11. Then, the suspension insulator 40 is fixedly connected to the connecting plate 30 and the transmission tower to complete the installation of the line surge arrester, which enhances the overall strength of the line surge arrester, improves the vibration resistance of the line surge arrester and improves the stability of the line surge arrester operation.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A line surge arrester, characterized by comprising: The application relates to a core assembly and a composite sheath. The core assembly is arranged in the composite sheath, and the core assembly comprises a resistance core and an insulating rod. The axial direction of the resistance core is parallel to the axial direction of the insulating rod, the insulating rod is at least three, the at least three insulating rods are sequentially attached to the outer periphery of the resistance core, and the at least three insulating rods are fixedly connected with the resistance core. The application relates to a first unit and a second unit.

2. The line surge arrester according to claim 1, characterized in that The core assembly comprises a first core assembly (11) and a second core assembly (21), and the composite sheath comprises a first composite sheath (12) and a second composite sheath (22). The first unit comprises the first core assembly (11) and the first composite sheath (12), and the second unit comprises the second core assembly (21) and the second composite sheath (22). The first unit and the second unit are fixedly connected, and the first unit and the second unit are sequentially arranged along the axial direction of the core assembly. The structure of the first core assembly (11) is consistent with the structure of the second core assembly (21).

3. The line surge arrester of claim 2, wherein The first core assembly (11) comprises a first resistance core (111) and at least three first insulating rods (112), the first end of the first resistance core (111) and the first ends of the at least three first insulating rods (112) are fixedly connected through a first fixing member (113), and the second end of the first resistance core (111) and the second ends of the at least three first insulating rods (112) are fixedly connected through a second fixing member (114). The first composite sheath (12) comprises a first insulating cylinder (121), a first flange (122) and a second flange (123).

4. The line surge arrester of claim 2, wherein The first flange (122) is fixedly connected to the port of the first end of the first insulating cylinder (121), the second flange (123) is fixedly connected to the port of the second end of the first insulating cylinder (121), and the first insulating cylinder (121) is a constant-diameter cylinder. The second composite sheath (22) comprises a second insulating cylinder (221), a third flange (222) and a fourth flange (223). The third flange (222) is fixedly connected to the port of the first end of the second insulating cylinder (221), the fourth flange (223) is fixedly connected to the port of the second end of the second insulating cylinder (221), the second insulating cylinder (221) comprises a narrow section and a wide section, the diameter of the narrow section is smaller than the diameter of the wide section, and the narrow section and the wide section are sequentially arranged from the first end of the second insulating cylinder (221) to the second end of the second insulating cylinder (221). The first flange (122) and the second flange (123) are bonded to the first insulating cylinder (121).

5. The line surge arrester of claim 4, wherein, And / or, the third flange (222) and the fourth flange (223) are bonded to the second insulating cylinder (221). A connecting plate (30) is arranged between the second flange (123) and the third flange (222), and the second flange (123), the connecting plate (30) and the third flange (222) are fixedly connected through a threaded fastener.

6. The line surge arrester of claim 4, wherein, ​ The fourth flange (223) is used for fixedly connecting the power transmission tower.

7. The line surge arrester of claim 6, wherein The suspension insulator (40) is at least two, one end of the suspension insulator (40) is fixedly connected to the connecting plate (30), and the other end of the suspension insulator (40) is fixedly connected to the power transmission tower. The suspension insulator (40) has an included angle between an axial direction and an axial direction of the core assembly.

8. The line surge arrester of claim 4, wherein, The first unit further comprises a first sealing plate (13) and a second sealing plate (14). The first sealing plate (13) is fixedly connected to and seals a first end of the first insulating barrel (121), and the second sealing plate (14) is fixedly connected to and seals a second end of the first insulating barrel (121). The second unit further comprises a third sealing plate (23) and a fourth sealing plate (24). The third sealing plate (23) is fixedly connected to and seals a first end of the second insulating barrel (221), and the fourth sealing plate (24) is fixedly connected to and seals a second end of the second insulating barrel (221).

9. The line surge arrester of claim 8, wherein, The second sealing plate (14) has a groove on one of the first core assemblies (11) and a boss on the other, so that the first core assemblies (11) and the second sealing plate (14) are positioned and matched. The fourth sealing plate (24) has a groove on one of the second core assemblies (21) and a boss on the other, so that the second core assemblies (21) and the fourth sealing plate (24) are positioned and matched.

10. The line surge arrester according to any of claims 1 to 9, characterized in that The material of the insulating rod is epoxy glass silk.

Images