A front-plug lightning protection assembly

Abstract

The utility model discloses a front insertion lightning arrester assembly for installing on the conductive terminal, including T type casing, be provided with the cylindrical lightning arrester on T type casing, T type casing is provided with first cavity, second cavity and third cavity, the cylindrical lightning arrester sets up in second cavity, be provided with end cap in third cavity, first cavity is compatible with the conductive terminal, the conductive terminal sets up in first cavity, makes T type casing sleeve set on the conductive terminal, connects the conductive terminal with the cylindrical lightning arrester, the utility model has the beneficial effect that: through with the cylindrical lightning arrester preloading in the second cavity of T type casing, again with the first cavity of T type casing direct with the conductive terminal alignment and displacement sleeve set, realized the quick, simple and convenient insertion type installation of lightning arrester assembly and the conductive terminal, this process does not need the complex tool or operation, has simplified the field installation process significantly, has improved the construction efficiency.

Description

Technical Field

[0001] This utility model relates to a front-mounted lightning protection component. Background Technology

[0002] In power transmission and transformation equipment, communication base stations, and other applications, lightning protection of conductive terminals is crucial. Traditional protection methods typically involve installing end caps on the conductive terminals for physical shielding. While this prevents dust and moisture from entering the terminal surface, the end caps only provide environmental sealing and cannot cope with abnormal voltages, such as lightning overvoltage. When lightning current enters, the conductive terminals may still be damaged by high-voltage flashover, leading to equipment failure. Therefore, this invention proposes a front-inserted lightning protection assembly to solve the aforementioned problems. Utility Model Content

[0003] The purpose of this invention is to provide a front-mounted lightning protection component to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A front-mounted surge arrester assembly for mounting on a conductive terminal includes a T-shaped housing, on which a columnar surge arrester is disposed; The T-shaped housing is provided with a first cavity, a second cavity, and a third cavity. The columnar surge arrester is disposed in the second cavity, and an end cap is disposed in the third cavity. The first cavity is adapted to the conductive terminal, and the conductive terminal is disposed in the first cavity, so that the T-shaped housing is sleeved on the conductive terminal, connecting the conductive terminal to the columnar surge arrester.

[0005] As an improvement to the above technical solution, the conductive terminal is provided with a conductive connector, the conductive connector is frustum-shaped, and the conductive connector is adapted to the first cavity; The conductive connector is interference-fitted and disposed in the first cavity.

[0006] As an improvement to the above technical solution, the columnar surge arrester is provided with a surge arrester metal terminal; The columnar surge arrester is interference-fitted in the second cavity, so that the surge arrester metal terminal is located between the first cavity and the third cavity.

[0007] As an improvement to the above technical solution, the lightning protection metal terminal is provided with mounting holes; A conductive bolt is provided inside the T-shaped housing. The conductive bolt is installed in the mounting hole. A clamping nut is threaded on the outer wall of the conductive bolt. The clamping nut contacts the lightning protection metal terminal, so that the conductive bolt is fixed inside the T-shaped housing.

[0008] As an improvement to the above technical solution, the conductive bolt is provided with a contact head; The conductive connector has a contact hole inside, and the T-shaped housing is sleeved on the conductive terminal so that the contact head extends into the contact hole to complete the conductive process.

[0009] As an improvement to the above technical solution, the end cap is provided with a connecting connector, which is adapted to the third cavity, and the connecting connector is provided with a connecting hole; The connecting joint is interference-fitted in the third cavity, so that the connecting hole is fitted onto the outer wall of the conductive bolt.

[0010] As an improvement to the above technical solution, a positioning groove is provided on the connecting joint, and the positioning groove matches the position of the connecting hole; The connecting hole is sleeved on the outer wall of the conductive bolt, so that the bottom of the positioning groove is pressed against the clamping nut.

[0011] As an improvement to the above technical solution, the outer wall of the columnar surge arrester is coated with a shielding layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are: By pre-installing the columnar surge arrester in the second cavity of the T-shaped housing, and then directly aligning and displacing the first cavity of the T-shaped housing with the conductive terminal, a quick and easy plug-in installation of the surge arrester assembly and the conductive terminal is achieved. This process does not require complicated tools or operations, significantly simplifies the on-site installation process, and improves construction efficiency. When the conductive terminal is housed in the first cavity that is adapted to it, the structural design directly facilitates an effective contact connection between the conductive terminal and the columnar surge arrester. This robust mechanical connection ensures that abnormal current can be reliably discharged to the ground through a predetermined path, thereby realizing the core surge protection function. The T-shaped housing integrates specific chamber structures that respectively house conductive terminals, columnar surge arresters, and end caps. This integrated and compact design not only simplifies the component composition and reduces the number of parts, but also makes the overall structure more regular, facilitating its arrangement in limited spaces and improving space utilization. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the T-shaped housing of this utility model; Figure 3 This is a schematic diagram of the columnar surge arrester of this utility model; Figure 4 This is a schematic diagram of the end cap structure of this utility model; Figure 5 This is a schematic diagram of the structure of the conductive terminal of this utility model; Figure 6 This utility model Figure 1 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram of the conductive bolt of this utility model.

[0014] In the diagram: 10. T-shaped housing; 11. First cavity; 12. Second cavity; 13. Third cavity; 20. End cap; 21. Connecting joint; 22. Connecting hole; 23. Positioning groove; 30. Conductive terminal; 31. Conductive connector; 32. Contact hole; 40. Columnar surge arrester; 41. Surge arrester metal terminal; 42. Mounting hole; 50. Conductive bolt; 51. Contact head; 52. Compression nut. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: like Figure 1-7 As shown, this embodiment proposes a front-mounted surge arrester assembly for installation on a conductive terminal 30, including a T-shaped housing 10, on which a columnar surge arrester 40 is provided; The T-shaped housing 10 is provided with a first cavity 11, a second cavity 12 and a third cavity 13. The columnar surge arrester 40 is disposed in the second cavity 12, and an end cap 20 is disposed in the third cavity 13. The first cavity 11 is adapted to the conductive terminal 30, and the conductive terminal 30 is disposed in the first cavity 11, so that the T-shaped housing 10 is sleeved on the conductive terminal 30, connecting the conductive terminal 30 to the columnar surge arrester 40.

[0017] In this embodiment, when the lightning protection assembly is used, the columnar lightning arrester 40 is first assembled in the second cavity 12. Then, the first cavity 11 on the T-shaped housing 10 is aligned with the conductive terminal 30, and the T-shaped housing 10 is moved so that the conductive terminal 30 is placed in the first cavity 11, thereby making the conductive terminal 30 contact and connect with the columnar lightning arrester 40 to complete the lightning protection process. Then, the end cap 20 is connected to the third cavity 13. By pre-installing the columnar surge arrester 40 in the second cavity 12 of the T-shaped housing 10, and then directly aligning and displacing the first cavity 11 of the T-shaped housing 10 with the conductive terminal 30, a quick and easy plug-in installation of the surge arrester assembly and the conductive terminal 30 is achieved. This process does not require complicated tools or operations, significantly simplifies the on-site installation process, and improves construction efficiency. When the conductive terminal 30 is housed in the first cavity 11 that is adapted to it, the structural design directly facilitates an effective contact connection between the conductive terminal 30 and the columnar surge arrester 40. This robust mechanical connection ensures that abnormal current can be reliably discharged to the ground through a predetermined path, thereby realizing the core surge protection function. The T-shaped housing 10 integrates specific chamber structures that respectively accommodate the conductive terminal 30, the columnar surge arrester 40, and the end cap 20. This integrated and compact design not only simplifies the component composition and reduces the number of parts, but also makes the overall structure more regular, which is convenient for arrangement in a limited space and improves space utilization.

[0018] Specifically, the conductive terminal 30 is provided with a conductive connector 31, which is frustoconical in shape and is adapted to the first cavity 11. The conductive connector 31 is interference-fitted into the first cavity 11.

[0019] In this embodiment, the conductive connector 31 adopts a frustum-shaped geometric configuration and forms a specific conical mating relationship with the first cavity 11. During the T-shaped housing 10 fitting process, the conical structure can automatically guide the conductive terminal 30 to be accurately aligned and smoothly slide into the first cavity 11, effectively eliminating assembly deviations and significantly improving the convenience and accuracy of installation operations. Furthermore, the conductive connector 31 and the first cavity 11 are fitted with an interference fit. When the conductive terminal 30 is inserted into the cavity, the outer conical surface of the frustum-shaped connector generates a continuous radial clamping force with the inner wall of the cavity. This design ensures that the conductive terminal 30 and the T-shaped housing 10 form a tight connection without gaps, effectively resisting the influence of external forces such as vibration and impact, preventing loosening during use, and ensuring the mechanical stability of the overall structure.

[0020] Specifically, the columnar surge arrester 40 is provided with a surge arrester metal terminal 41; The columnar surge arrester 40 is interference-fitted in the second cavity 12, such that the surge arrester metal terminal 41 is located between the first cavity 11 and the third cavity 13.

[0021] In this embodiment, the columnar surge arrester 40 and the second cavity 12 are configured with an interference fit. This fit generates a continuous radial clamping force during assembly, which makes the columnar surge arrester 40 firmly embedded in the second cavity 12, effectively resisting the effects of vibration, impact and thermal stress, significantly improving the mechanical fixation reliability of the columnar surge arrester 40 in the T-shaped housing 10, and preventing displacement or loosening during operation. Of course, the interference fit structure constraint forces the lightning protection metal terminal 41 to be positioned in a preset position between the first cavity 11 and the third cavity 13. This design eliminates the positional deviation caused by the installation tolerance and ensures that the lightning protection metal terminal 41 is always in the optimal spatial position for electrical connection with the first cavity 11 and the third cavity 13, laying the foundation for subsequent reliable electrical contact.

[0022] Specifically, the lightning protection metal terminal 41 is provided with a mounting hole 42; A conductive bolt 50 is provided inside the T-shaped housing 10. The conductive bolt 50 is disposed in the mounting hole 42. A clamping nut 52 is threaded on the outer wall of the conductive bolt 50. The clamping nut 52 contacts the lightning protection metal terminal 41, so that the conductive bolt 50 is fixed inside the T-shaped housing 10.

[0023] In this embodiment, the conductive bolt 50 passes through the mounting hole 42 of the lightning protection metal terminal 41 and is tightened to the terminal surface by threaded engagement of the clamping nut 52, forming a bolt and nut locking structure. This structure provides a high-strength, adjustable axial clamping force to ensure a stable and repeatedly disassembled mechanical connection between the conductive bolt 50 and the lightning protection metal terminal 41, effectively resisting loosening failure caused by vibration, impact and thermal stress. Of course, the conductive bolt 50, as a conductive carrier, penetrates the mounting hole 42, and its outer wall and the inner wall of the mounting hole 42 form a direct electrical contact interface with a large contact area. The clamping nut 52 clamps the lightning protection metal terminal 41 to further enhance the contact pressure of this interface, promotes the plastic deformation of the micro surface to increase the effective contact area, significantly reduces the contact resistance, and ensures that the current is transmitted efficiently and with low loss between the lightning protection metal terminal 41, the conductive bolt 50 and the subsequent path.

[0024] Specifically, the conductive bolt 50 is provided with a contact head 51; The conductive connector 31 is provided with a contact hole 32, and the T-shaped housing 10 is sleeved on the conductive terminal 30, so that the contact head 51 extends into the contact hole 32 to complete the conductive process.

[0025] In this embodiment, the contact head 51 of the conductive bolt 50 and the contact hole 32 in the conductive connector 31 form a shaft-hole plug-in mating structure. When the T-shaped housing 10 is fitted onto the conductive terminal 30, the contact head 51 is automatically guided into the contact hole 32, forming a self-centering guiding effect, which effectively overcomes assembly deviation. This design significantly simplifies the installation operation process and can achieve fast and reliable electrical connection without precise adjustment.

[0026] Specifically, the end cap 20 is provided with a connecting connector 21, which is adapted to the third cavity 13, and the connecting connector 21 is provided with a connecting hole 22; The connecting joint 21 is interference-fitted in the third cavity 13, so that the connecting hole 22 is fitted onto the outer wall of the conductive bolt 50.

[0027] In this embodiment, the connecting joint 21 and the third cavity 13 are assembled by an interference fit, generating a continuous radial clamping force at the contact interface. This design enables the end cap 20 and the T-shaped housing 10 to form a gapless physical bond, effectively resisting vibration, thermal expansion and contraction and external impact, eliminating the risk of the end cap 20 loosening, and ensuring the overall sealing and mechanical integrity of the internal structure of the T-shaped housing 10.

[0028] Specifically, the connecting joint 21 is provided with a positioning groove 23, which is matched with the position of the connecting hole 22; The connecting hole 22 is sleeved on the outer wall of the conductive bolt 50, so that the bottom of the positioning groove 23 is pressed against the clamping nut 52.

[0029] In this embodiment, the annular geometry of the positioning groove 23 is precisely matched with the outer contour of the clamping nut 52, forming a circumferential limiting mechanism during the clamping process of the clamping nut 52. This design eliminates the radial offset and rotational degree of freedom of the clamping nut 52, ensuring that the center of the clamping nut 52 always coincides with the axis of the conductive bolt 50, ensuring uniform distribution of clamping force, and preventing loosening of the connection or uneven contact due to off-center load.

[0030] Specifically, the outer wall of the columnar surge arrester 40 is coated with a shielding layer.

[0031] In this embodiment, the shielding layer acts as a physical barrier layer, blocking direct contact between external moisture and dirt and the outer wall of the surge arrester, significantly reducing surface leakage current. In harsh environments such as humidity and salt spray, this structure significantly improves the surface flashover voltage threshold, preventing insulation flashover accidents caused by dirt accumulation.

[0032] The shielding layer is made of silicone rubber / epoxy resin doped with silicon carbide or zinc oxide.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A front-mounted lightning protection assembly, characterized in that: For mounting on conductive terminals (30), including a T-shaped housing (10) on which a columnar surge arrester (40) is provided; The T-shaped housing (10) is provided with a first cavity (11), a second cavity (12) and a third cavity (13). The columnar surge arrester (40) is disposed in the second cavity (12), and an end cap (20) is disposed in the third cavity (13). The first cavity (11) is adapted to the conductive terminal (30), and the conductive terminal (30) is disposed in the first cavity (11), so that the T-shaped housing (10) is sleeved on the conductive terminal (30) to connect the conductive terminal (30) to the columnar surge arrester (40).

2. The front-mounted lightning protection assembly according to claim 1, characterized in that: The conductive terminal (30) is provided with a conductive connector (31), the conductive connector (31) is frustoconical, and the conductive connector (31) is adapted to the first cavity (11); The conductive connector (31) is interference-fitted into the first cavity (11).

3. A front-mounted lightning protection assembly according to claim 2, characterized in that: The columnar surge arrester (40) is provided with a surge arrester metal terminal (41). The columnar surge arrester (40) is interference-fitted in the second cavity (12), so that the surge arrester metal terminal (41) is located between the first cavity (11) and the third cavity (13).

4. A front-mounted lightning protection assembly according to claim 3, characterized in that: The lightning protection metal terminal (41) is provided with a mounting hole (42); The T-shaped housing (10) is provided with a conductive bolt (50), which is installed in the mounting hole (42). The outer wall of the conductive bolt (50) is threaded with a clamping nut (52), which contacts the lightning protection metal terminal (41), so that the conductive bolt (50) is fixed inside the T-shaped housing (10).

5. A front-mounted lightning protection assembly according to claim 4, characterized in that: The conductive bolt (50) is provided with a contact head (51); The conductive connector (31) is provided with a contact hole (32), and the T-shaped housing (10) is sleeved on the conductive terminal (30), so that the contact head (51) extends into the contact hole (32) to complete the conductive process.

6. A front-mounted lightning protection assembly according to claim 5, characterized in that: The end cap (20) is provided with a connecting joint (21), which is adapted to the third cavity (13), and the connecting joint (21) is provided with a connecting hole (22). The connecting joint (21) is interference-fitted in the third cavity (13), so that the connecting hole (22) is fitted on the outer wall of the conductive bolt (50).

7. A front-mounted lightning protection assembly according to claim 6, characterized in that: The connecting joint (21) is provided with a positioning groove (23), and the positioning groove (23) matches the position of the connecting hole (22); The connecting hole (22) is fitted onto the outer wall of the conductive bolt (50), so that the bottom of the positioning groove (23) is pressed against the clamping nut (52).

8. A front-mounted lightning protection assembly according to claim 1, characterized in that: The outer wall of the columnar surge arrester (40) is coated with a shielding layer.

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