A lightning arrester

Abstract

This utility model provides a surge arrester, which includes a main housing, a cap, a surge arrester core, and an adapter. The main housing has an inner cavity and an opening. The cap is detachably connected to the opening of the main housing and has a clearance hole corresponding to the opening. The surge arrester core is fixed in the inner cavity of the main housing. The first end of the surge arrester core is located at the opening and is provided with a connecting screw hole, and the second end is used for grounding. The adapter includes a first connecting body and a stud connected to each other. The first connecting body is provided with a receiving hole, and the stud and the connecting screw hole are threaded together. One end of the cable is connected to the electrical component to be protected by lightning, and the other end passes through the clearance hole and extends into the receiving hole of the adapter. Obviously, the connection between the cable and the surge arrester is located inside the surge arrester, without occupying the installation environment outside the surge arrester. This allows for more redundant space in the installation environment to facilitate installation and operation. Therefore, the surge arrester provided in this application is suitable for installation environments with limited space.

Description

Technical Field

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

[0002] A surge arrester (also known as an overvoltage protector) is an electrical device used to protect electrical equipment from high transient overvoltage hazards and to limit the duration and value of follow current.

[0003] The protected equipment can be electrically connected via transition flanges and surge arresters to ensure the safety and stability of the power system. However, installing flanges is difficult in environments with limited space.

[0004] To address this issue, existing technologies use cables to achieve the electrical connection between the protected equipment and the surge arrester. However, the connection structure between the cable and the surge arrester is complex, affecting connection efficiency. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a surge arrester suitable for installation environments with limited space.

[0006] This application provides a surge arrester, the surge arrester comprising:

[0007] An insulating housing, comprising a main shell and a cap, the main shell having an inner cavity and an opening, the cap being detachably connected to the opening of the main shell, the cap having a clearance hole that communicates with the opening;

[0008] A lightning protection core is fixed in the inner cavity of the main shell. The lightning protection core includes a first end and a second end opposite to each other. The first end is located at the opening and is provided with a connecting screw hole. The connecting screw hole is exposed through the opening. The second end is used for grounding.

[0009] The adapter is a conductor and is located between the lightning arrester core and the cap. The adapter includes a first connecting body and a stud that are connected to each other. The stud and the connecting screw hole are threaded together. The end of the first connecting body facing the cap is provided with a receiving hole. The receiving hole and the clearance hole are correspondingly connected.

[0010] The rail transit vehicle includes a power distribution box and electrical components for power circuits. The electrical components are fixed in the power distribution box. The housing of the surge arrester is fixedly connected to the box wall of the power distribution box. One end of the cable is connected to the electrical component, and the other end passes through the clearance hole and extends into the receiving hole of the adapter, so that the electrical component is connected to the surge arrester core through the cable and the adapter.

[0011] When the rail transit vehicle is struck by lightning, causing the voltage between the two ends of the lightning arrester core to exceed the threshold, the lightning arrester core becomes conductive, and the insulating shell is used to provide high-voltage insulation protection for the lightning arrester core, the adapter, the cable, and the connection part of the adapter.

[0012] In one alternative embodiment, the cap is conical in shape, and its cross-section gradually decreases along the direction from the main shell toward the cap.

[0013] In one optional embodiment, the axial direction of the stud and the extension direction of the receiving hole are the same, and the axis of the clearance hole and the axis of the receiving hole are collinear.

[0014] In one optional embodiment, the receiving hole includes a first hole segment and a second hole segment distributed along its own axial direction, the second hole segment being located between the first hole segment and the stud, and the inner diameter of the first hole segment gradually decreasing in the direction toward the second hole segment.

[0015] In an optional embodiment, the adapter further includes a spring plate disposed within a receiving hole of the first connector. The spring plate includes two connecting ends distributed axially along the receiving hole, and both connecting ends are connected to the inner wall surface of the receiving hole.

[0016] In one optional embodiment, the adapter further includes a second connector, the second connector having a first surface and a second surface, the first surface being connected to the first connector and the second surface being connected to the stud; the second connector having a radial dimension along the stud greater than the radial dimension of the stud and greater than the radial dimension of the first connector along the stud.

[0017] In one alternative embodiment, at least two force-applying holes are provided on the first surface of the second connector.

[0018] In one alternative embodiment, the two force application holes are symmetrically distributed about the axis of the stud.

[0019] In one alternative embodiment, the second connector is a polygonal disc.

[0020] In one alternative embodiment, the second connector includes a side surface connected between the first surface and the second surface, and the second connector includes a plurality of grooves disposed on the side surface, the plurality of grooves being spaced apart around the first connector.

[0021] When using the above-mentioned technical solution provided in this application, the surge arrester provided in this application has several advantages. First, since the adapter can be separated from the surge arrester core, and the other end of the cable is accommodated in the receiving hole of the adapter, it can be connected by crimping. Therefore, not only is there no need for other connecting parts between the cable and the adapter, but the connection only occupies the internal space of the adapter and does not occupy other space. Therefore, there is no need to set up connecting parts for connecting cables outside the insulating shell, thus reducing the overall size of the surge arrester. Second, since the adapter can be separated from the surge arrester core, the crimping operation between the cable and the adapter can be performed outside the power distribution box, which requires less space from the power distribution box. Third, since the connector is located in the insulating shell, the cable only needs to pass through the clearance hole on the cap to connect with the adapter. The connection between the cable and the surge arrester is located inside the surge arrester and does not occupy the environmental space outside the surge arrester. Therefore, when the size of the installation environment remains unchanged, the surge arrester provided in this application can provide more redundant space in the installation environment to facilitate the installation operation. Therefore, the surge arrester provided in this application has the beneficial effect of being suitable for installation environments with limited space. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a surge arrester provided in an embodiment of this application.

[0023] Figure 2 This application is based on Figure 1 An exploded view of a surge arrester is provided.

[0024] Figure 3 This application is based on Figure 1 A three-dimensional view of an adapter in a surge arrester is provided.

[0025] Figure 4 Based on Figure 3 A cross-sectional view of the provided adapter.

[0026] Figure 5 Based on Figure 1 The provided surge arrester includes a schematic diagram showing the connection between the cable and the surge arrester.

[0027] Figure 6 Based on Figure 5 This shows a partial cross-sectional view of the cable and surge arrester connection and the surrounding structure.

[0028] List of reference numerals in the attached diagram:

[0029] 10-Adapter, 11-First connector, 110-Receiving hole, 12-Stud, 13-Second connector, 130-Force application hole, 14-Spring plate;

[0030] 21-Main shell, 22-Cap, 221-Allowing hole; 30-Surge protection core, 31-Connecting screw hole; 50-Cable. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0032] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] refer to Figures 1 to 3 This application provides a surge arrester, which includes an insulating shell, a surge arrester core 30, and an adapter 10. The insulating shell includes a main shell 21 and a cap 22. The main shell 21 has an inner cavity and an opening. The cap 22 is detachably connected to the opening of the main shell 21 and has a clearance hole 221 that communicates with the opening. The surge arrester core 30 is fixed in the inner cavity of the main shell 21 and includes a first end and a second end. The first end is located at the opening and has a connecting screw hole 31, which is exposed through the opening. The second end is used for grounding. The adapter 10 is a conductor and is located between the surge arrester core and the cap 22. The adapter includes a first connecting body 11 and a stud 12 that are connected to each other. The stud 12 is threadedly connected to the connecting screw hole 31. A receiving hole 110 is provided at one end facing the cap 22, and the receiving hole 110 and the clearance hole 221 are correspondingly connected. The rail transit vehicle includes a power distribution box and multiple electrical components for power circuits. The multiple electrical components are fixed in the power distribution box. The housing of the surge arrester is fixedly connected to the box wall of the power distribution box. One end of the cable 50 is connected to the electrical component, and the other end passes through the clearance hole 221 and extends into the receiving hole 110 of the adapter 10, so that the electrical component is connected to the surge arrester core 30 through the cable 50 and the adapter 10. When the rail transit vehicle is struck by lightning and the voltage between the two ends of the surge arrester core 30 exceeds the threshold, the surge arrester core 30 conducts. The insulating housing is used to provide high-voltage insulation protection for the surge arrester core 30, the adapter 10, the cable 50 and the connection part of the adapter 10. The structure of the other end of the surge arrester core 30 being grounded is not shown in the figures of this application, nor are the power distribution box and electrical components of the rail transit vehicle shown.

[0034] Those skilled in the art should understand that the surge protector core 30 is in a high-resistance state when the voltage is below the threshold. When it is struck by lightning and the voltage between its two ends exceeds the threshold, the resistance of the surge protector core 30 drops sharply and it becomes a low-resistance conducting state, thereby dissipating the excess voltage energy to the ground and protecting the surge protection equipment.

[0035] Those skilled in the art should understand that, since the surge arrester core and adapter need to withstand high voltage when struck by lightning, the insulating shell needs to have high voltage insulation properties to prevent the insulating shell from being broken down and the voltage of the surge arrester core and adapter from leaking out when struck by lightning.

[0036] As can be seen from the above technical solution, when electrical components in a power distribution box need to be connected to a surge arrester to avoid damage from lightning strikes, a cable 50 can be used to connect the electrical components and the surge arrester. The cable 50 has good flexibility and can adapt to complex installation environments through deformation. In the surge arrester provided in this application, since the adapter 10 is housed in an insulating shell, the stud 12 of the adapter 10 can be inserted into the connecting screw hole 31 of the surge arrester core 30, and the receiving hole 110 of the adapter 10 can accommodate the other end of the cable 50. Therefore, after the other end of the cable 50 is inserted into the receiving hole 110 of the adapter 10, the cable 50 and the first connecting body 11 of the adapter 10 can be firmly connected together by crimping.

[0037] Therefore, by using the surge arrester provided in this application, on the one hand, since the adapter 10 can be separated from the surge arrester core 30, and the other end of the cable 50 is accommodated in the receiving hole of the adapter 10, and can then be connected by crimping, not only is there no need for other connecting parts between the cable 50 and the adapter 10, but the connection only occupies the internal space of the adapter and does not occupy other space. Therefore, there is no need to provide connecting parts for connecting cables outside the insulating housing, thus reducing the overall size of the surge arrester; on the other hand, since the adapter 10 can be separated from the surge arrester core 30, the cable 50 and the adapter... The crimping operation between the heads 10 can be performed outside the power distribution box, which requires less space in the power distribution box; thirdly, since the connector is located in the insulating housing, the cable 50 only needs to pass through the clearance hole on the cap 22 to connect with the adapter. The connection between the cable 50 and the surge arrester is located inside the surge arrester, without occupying the environmental space outside the surge arrester; therefore, when the size of the installation environment remains unchanged, using the surge arrester provided by this application can provide more redundant space in the installation environment to facilitate the installation operation. Therefore, the surge arrester provided by this application has the beneficial effect of being suitable for installation environments with limited space.

[0038] The specific connection sequence between cable 50 and the surge arrester can be as follows:

[0039] First, separate the cap 22 from the main body 21, and remove the adapter 10 from the surge arrester core 30;

[0040] Then, pass the other end of the cable 50 through the clearance hole 221 of the cap 22 and insert it into the receiving hole 110 of the adapter 10;

[0041] Then, the other end of the cable 50 and the first connector 11 of the adapter 10 are crimped together;

[0042] Then, connect the stud 12 of the adapter 10 and the connecting screw hole 31 of the lightning arrester core 30 together;

[0043] Then, the cap 22 is connected to the main body 21, thereby covering the adapter 10 and the surge arrester core 30 exposed from the opening of the main body 21.

[0044] Obviously, when the other end of the cable 50 is crimped to the first connector 11 of the adapter 10, it is not limited to the power distribution box. The adapter 10 and the surge arrester core 30 are threaded, so no additional connection space is required. Only the connection operation space between the main shell 21 and the cap 22 needs to be considered. Therefore, only a small amount of space is needed in the installation environment for rotating the adapter 10 and installing the cap 22. Thus, the surge arrester provided in this application has low space requirements for installation environment and is suitable for installation environments with limited space.

[0045] Specifically, the cable 50 includes an insulating outer sheath and an internal conductor. A portion of the insulating outer sheath can be removed to expose a section of the internal conductor. The exposed section of the internal conductor of the cable 50 can be inserted into the receiving hole 110 of the first connector 11. Then, the first connector 11 is compressed radially along the receiving hole 110. After the first connector 11 is compressed and deformed, it can clamp the cable 50, thereby connecting the cable 50 and the first connector 11.

[0046] In one example, both the stud 12 and the first connector 11 can be metallic conductors to facilitate conductive connection.

[0047] In one example, the stud 12 and the first connector 11 may be integrally formed.

[0048] The electrical components in the power distribution box can be at least one of disconnecting switches, circuit breakers, voltage transformers, and current transformers. In one example, when multiple electrical components in the high-voltage distribution box need to be connected to a surge arrester, a connecting conductor can be provided, allowing multiple electrical components to be connected in parallel to the connecting conductor. One end of the cable is connected to the connecting conductor, and the other end is connected to the surge arrester. In this way, multiple electrical components are connected to the surge arrester.

[0049] The power distribution box on a rail transit vehicle is mainly used to install electrical components suitable for the power circuit, which refers to the circuit that provides driving force to the vehicle. Rail transit vehicles may also include lighting distribution boxes and air conditioning distribution boxes, which may also be equipped with surge arresters as needed.

[0050] In one possible implementation, refer to Figure 1 and Figure 2 The cap 22 is cone-shaped, and its cross-section gradually decreases along the direction from the main shell 21 toward the cap 22. Based on this technical solution, the end of the cap 22 closer to the main shell 21 is larger, facilitating connection to the main shell 21 to cover the adapter 10 and the surge arrester core 30 and provide insulation protection. The end of the cap 22 furthest from the main shell 21 is smaller, providing insulation protection for the cable and reducing the overall size of the surge arrester, making it suitable for installation environments with limited space.

[0051] In addition, in practical applications, after the cable 50 and the surge arrester are connected together, a seal can be installed in the gap between the cable 50 and the inner wall of the clearance hole 221. The seal can fill the gap between the cable 50 and the inner wall of the clearance hole 221, effectively preventing moisture, dust and other impurities from entering the surge arrester and ensuring the working performance and service life of the surge arrester.

[0052] In one possible implementation, the axial direction of the stud 12 is the same as the extending direction of the receiving hole 110. This design allows the extending direction of the cable 50 to be the same as the axial direction of the stud 12. Thus, the adapter can be suitable for applications requiring the extending direction of the cable 50 to be the same as the extending direction of the connecting screw hole 31 on the surge arrester.

[0053] In another possible implementation, the axial direction of the stud 12 and the extending direction of the receiving hole 110 form an angle greater than 0° and less than 90°. That is, the angle between the axial direction of the stud 12 and the extending direction of the receiving hole 110 can be an acute angle or a right angle. This design allows for an acute or right angle between the extending direction of the cable 50 and the axial direction of the stud 12. Thus, the adapter can be suitable for applications requiring an angle between the extending direction of the cable 50 and the extending direction of the connecting screw hole 31 on the surge arrester.

[0054] Furthermore, the axis of the clearance hole 221 and the axis of the receiving hole 110 can be collinear. This avoids situations where the cable 50 needs to be bent in the clearance hole 221 and the receiving hole 110.

[0055] In one possible implementation, refer to Figure 3 and Figure 4The receiving hole 110 includes a first hole segment and a second hole segment distributed along its own axial direction. The second hole segment is located between the first hole segment and the stud 12. The inner diameter of the first hole segment gradually decreases in the direction towards the second hole segment. With this design, when the cable 50 is inserted into the receiving hole 110, it first passes through the first hole segment. Since the inner diameter of the first hole segment gradually decreases in the direction towards the second hole segment, the first hole segment is flared in shape during the insertion of the cable 50 into the receiving hole 110, which can play a guiding role and facilitate the rapid insertion of the cable 50 into the receiving hole 110. The second hole segment is a straight hole segment, that is, the inner diameter of the second hole segment is the same everywhere. The minimum inner diameter of the first hole segment is the same as the inner diameter of the second hole segment, which facilitates the connection of the cable 50 and the first connector 11 together by crimping.

[0056] Furthermore, in practical applications, after connecting cable 50 to the surge arrester via an adapter, a seal can be installed in the first hole section, taking advantage of its gradually increasing inner diameter. The seal is located between the first connector 11 and cable 50. The seal fills the gap between cable 50 and the first connector 11, effectively preventing moisture, dust, and other impurities from entering the adapter, thus ensuring its performance and lifespan. Simultaneously, the seal also acts as a buffer, reducing friction and damage to cable 50 during connection.

[0057] In one possible implementation, refer to Figure 4 The adapter also includes a spring plate 14, which is disposed within the receiving hole 110 of the first connector 11. The spring plate 14 includes two connecting ends distributed axially along the receiving hole 110, and both connecting ends are connected to the inner wall surface of the receiving hole 110. With this design, when no external force is applied, the spring plate 14 is in a free state, occupying part of the space in the receiving hole 110. The space between the spring plate 14 and the inner wall surface of the receiving hole 110 has a small radial direction. When the cable 50 is inserted into the receiving hole 110, the spring plate 14 can be deformed by the cable 50 and extend between the spring plate 14 and the inner wall surface of the receiving hole 110, thus clamping the cable 50 between the spring plate 14 and the inner wall surface of the receiving hole 110. Therefore, the spring plate 14 can adapt to cables 50 of different diameters, ensuring a tight connection between the cable 50 and the first connector 11. Simultaneously, the spring plate 14 can also alleviate the tensile force on the cable 50 to a certain extent, protecting the cable 50 from damage. The number of spring pieces 14 can be one or two, and the two spring pieces 14 can be symmetrically distributed about the axis of the receiving hole 110.

[0058] In one possible implementation, refer to Figure 3 and Figure 4The adapter also includes a second connector 13, which has a first surface and a second surface. The first surface is connected to the first connector 11, and the second surface is connected to the stud 12. The radial dimension of the second connector 13 along the stud 12 is larger than the radial dimension of the stud 12, and also larger than the radial dimension of the first connector 11 along the stud 12. With this technical solution, the adapter 10 has a shape that is thicker in the middle and thinner at both ends. During the process of rotating the stud 12 of the adapter towards the connecting screw hole 31, the second connector 13 can be used to limit the screwing depth of the stud 12 in the connecting screw hole 31. When the second connector 13 touches the port of the connecting screw hole 31 on the surge arrester, the stud 12 can no longer be rotated. At this point, the operator can know that the stud 12 has been rotated into place, and the connection between the adapter and the connecting screw hole 31 of the surge arrester is complete.

[0059] In one possible implementation, refer to Figure 3 The first surface of the second connector 13 is provided with at least two force-applying holes 130. With this design, during the process of rotating the stud 12 into the connecting screw hole 31 of the surge arrester, a corresponding operating tool can be inserted into the force-applying hole 130, and then a rotational force can be applied to the second connector 13 through the operating tool, thereby rotating the adapter and gradually screwing the stud 12 into the connecting screw hole 31. The force-applying hole 130 can be a blind hole or a through hole.

[0060] In one example, refer to Figure 3 There are two force application holes 130, which are symmetrically distributed about the axis of the stud 12. Thus, by inserting a suitable operating tool into the force application hole 130 and applying rotational force to the second connector 13 through the operating tool, the rotational force can be more evenly distributed on the second connector 13 during the rotation of the adapter, facilitating the quick and easy rotation of the stud 12 of the adapter into the connection screw hole 31 of the surge arrester.

[0061] In one example, refer to Figure 3 The second connector 13 can be constructed as a disk. Understandably, the axis of the stud 12 and the preset projection plane, and the orthographic projection of the second connector 13 onto the preset projection plane are polygons.

[0062] In another possible implementation, the second connector 13 is a polygonal disc. It is understood that the axial direction of the stud 12 and the orthographic projection of the second connector 13 onto the preset projection plane are polygonal. With this design, during the process of rotating the stud 12 into the connecting screw hole 31 of the surge arrester, the operator can easily hold the second connector 13 while applying rotational force to rotate the adapter, gradually screwing the stud 12 into the connecting screw hole 31; or, an operating tool can be used to apply rotational force to the second connector 13 to rotate the adapter. For example, the second connector 13 can be hexagonal, and the operating tool can have an internal hexagonal hole; after being fitted onto the second connector 13, the adapter can be rotated.

[0063] In one possible implementation, the second connector 13 includes a side surface connecting the first surface and the second surface. The second connector 13 includes a plurality of grooves disposed on the side surface, the grooves being spaced apart around the first connector 11. Thus, those skilled in the art will understand that the side surface of the second connector 13 is a closed annular surface. The side surface of the second connector 13 can be a closed circular annular surface or a closed polygonal annular surface, etc. With this design, during the process of rotating the stud 12 into the connecting screw hole 31 of the surge arrester, it is convenient for the operator's fingers or tools to be inserted into the grooves. The grooves can provide an anti-slip effect, thereby reliably applying rotational force to the second connector 13 to rotate the adapter, so that the stud 12 is gradually screwed together with the connecting screw hole 31.

[0064] It should be noted that, depending on the implementation needs, the various components / steps described in the embodiments of the present invention can be broken down into more components / steps, or two or more components / steps or parts of the operation of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of the present invention.

[0065] The above embodiments are only used to illustrate the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of the present invention, and the patent protection scope of the embodiments of the present invention should be defined by the claims.

Claims

1. A surge arrester, characterized by, The surge arrester includes: An insulating housing, comprising a main shell (21) and a cap (22), wherein the main shell (21) has an inner cavity and an opening, and the cap (22) is detachably connected to the opening of the main shell (21), and the cap (22) has a clearance hole (221), wherein the clearance hole (221) and the opening are correspondingly connected; The lightning protection core (30) is fixed in the inner cavity of the main shell (21). The lightning protection core (30) includes a first end and a second end opposite to each other. The first end is located at the opening and is provided with a connecting screw hole (31). The connecting screw hole (31) is exposed through the opening. The second end is used for grounding. The adapter (10) is a conductor and is located between the lightning arrester core and the cap (22). The adapter includes a first connecting body (11) and a stud (12) that are connected to each other. The stud (12) is threadedly connected to the connecting screw hole (31). The first connecting body (11) has a receiving hole (110) at one end facing the cap (22). The receiving hole (110) and the clearance hole (221) are correspondingly connected. The rail transit vehicle includes a power distribution box and electrical components for power circuits. The electrical components are fixed in the power distribution box. The housing of the surge arrester is fixedly connected to the box wall of the power distribution box. One end of the cable (50) is connected to the electrical component, and the other end passes through the clearance hole (221) and extends into the receiving hole (110) of the adapter (10), so that the electrical component is connected to the surge arrester core (30) through the cable (50) and the adapter (10). When the rail transit vehicle is struck by lightning, causing the voltage between the two ends of the lightning protection core (30) to exceed the threshold, the lightning protection core (30) becomes conductive, and the insulating shell is used to provide high-voltage insulation protection for the lightning protection core (30), the adapter (10), the cable (50), and the connection part of the adapter (10).

2. The surge arrester of claim 1, wherein The cap (22) is cone-shaped, and its cross-section gradually decreases along the direction from the main shell (21) toward the cap (22).

3. The surge arrester of claim 1, wherein The axial direction of the stud (12) is the same as the extension direction of the receiving hole (110), and the axis of the clearance hole (221) is collinear with the axis of the receiving hole.

4. The surge arrester of claim 1, wherein The receiving hole (110) includes a first hole segment and a second hole segment distributed along its own axial direction. The second hole segment is located between the first hole segment and the stud (12). The inner diameter of the first hole segment gradually decreases in the direction toward the second hole segment.

5. The surge arrester of claim 1, wherein The adapter also includes a spring plate (14), which is disposed in the receiving hole (110) of the first connector (11). The spring plate (14) includes two connecting ends distributed along the axial direction of the receiving hole (110), and both connecting ends are connected to the inner wall surface of the receiving hole (110).

6. The surge arrester of any one of claims 1-5, wherein, The adapter also includes a second connector (13), which includes a first surface and a second surface. The first surface is connected to the first connector (11), and the second surface is connected to the stud (12). The second connector (13) has a radial dimension greater than that of the stud (12) and greater than that of the first connector (11) along the radial dimension of the stud (12).

7. The surge arrester of claim 6, wherein At least two force-applying holes (130) are provided on the first surface of the second connector (13).

8. The surge arrester of claim 7, wherein, The two force-applying holes (130) are symmetrically distributed about the axis of the stud (12).

9. The surge arrester of claim 6, wherein, The second connector (13) is a polygonal disk shape.

10. The surge arrester of claim 6, wherein, The second connector (13) includes a side surface connected between the first surface and the second surface, and the second connector (13) includes a plurality of grooves disposed on the side surface, the plurality of grooves being spaced apart around the first connector (11).

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