An alternating current arrester with a discharge gap

Abstract

The utility model discloses a kind of with discharge gap ac lightning arrester, including lightning arrester body, support, current lead ring and insulator, current lead ring is fixedly installed in the top of lightning arrester body, support and current lead ring between fixedly installed have the support rod of inclined support state, support rod integrally formed with a pair of and current lead ring inlaying support section, realize stable support to current lead ring by support section and current lead ring inlaying.This utility model is set up support rod on with discharge gap ac lightning arrester, can form stable and reliable support to current lead ring, effectively avoid current lead ring to occur sway or displacement under complex environment such as strong wind, ensure the stability and consistency of discharge gap, to guarantee the protection performance of lightning arrester.Installing process only needs to be completed by inlaying and bolt fixing, convenient and efficient operation, with higher practicality and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage electrical appliances, specifically an AC surge arrester with a discharge gap. Background Technology

[0002] AC surge arresters with discharge gaps are key devices for power systems to protect against overvoltage disasters, and their core function relies on the current-guiding ring. The current-guiding ring concentrates electric field energy, guiding the overvoltage to a preset discharge gap, and ultimately releasing it to the ground through the arrester body, thereby protecting transmission lines and substation equipment. The installation stability of the current-guiding ring directly determines the dimensional accuracy of the discharge gap, and the consistency of the discharge gap is a core prerequisite for ensuring the protective performance of the surge arrester. Currently, surge arrester current-carrying rings are commonly installed using a single bolt. This involves directly locking the current-carrying ring to the top support of the surge arrester body through a single bolt that passes through the mounting hole. While simple in structure, this method lacks stability and is susceptible to displacement due to external forces. The single bolt only provides a point constraint on the current-carrying ring at the fixed point, failing to effectively limit the overall movement of the ring. Under common conditions such as strong winds and line vibrations, the current-carrying ring is prone to rotation around the bolt axis or axial movement along the bolt, causing the actual size of the discharge gap to deviate from the design value. Once the gap distance deviates, it can lead to increased discharge voltage dispersion, or even delayed overvoltage response, and in severe cases, insulation breakdown of equipment or power grid tripping. Therefore, improvements are needed. Utility Model Content

[0003] The purpose of this invention is to provide an AC surge arrester with a discharge gap to solve the problem of poor installation stability of the current-carrying ring in conventional AC surge arresters with discharge gaps mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an AC surge arrester with a discharge gap, comprising an arrester body, a bracket, a current-carrying ring, and an insulator. The current-carrying ring is fixedly installed on the top of the arrester body. A support rod in an inclined support state is fixedly installed between the bracket and the current-carrying ring. The support rod is integrally formed with a pair of supporting sections that fit into the current-carrying ring. Stable support for the current-carrying ring is achieved by the fitting of the supporting sections into the current-carrying ring.

[0005] Preferably, the support rod is fixedly installed above the bracket by bolts, and both ends of the support rod are integrally formed with arc-shaped segments for the bolts to pass through.

[0006] Preferably, the top of the bracket is provided with a socket for receiving the bolt.

[0007] Preferably, the supporting sections are symmetrically distributed along the central axis at the top of the support rod.

[0008] Preferably, the supporting section is a U-shaped structure, and the inner diameter of the U-shaped structure is adapted to the drainage ring.

[0009] Preferably, the bends of the support rod are all rounded for a smooth transition.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention, by installing a support rod on an AC surge arrester with a discharge gap, provides stable and reliable support for the current-carrying ring, effectively preventing the ring from swaying or shifting in complex environments such as strong winds. This ensures the stability and consistency of the discharge gap, thereby guaranteeing the protective performance of the surge arrester. Installation is simple, requiring only fitting and bolt fixing, making it convenient and efficient, and possessing high practicality and promotional value. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall side view of the present invention. Figure 3 This is an enlarged three-dimensional structural diagram of the support rod of this utility model.

[0012] In the diagram: 1. Surge arrester body; 2. Bracket; 3. Current-draining ring; 4. Insulator; 5. Support rod; 6. Support section; 7. Socket; 8. Arc section. Detailed Implementation

[0013] 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.

[0014] Please see Figures 1-3 This utility model provides a technical solution: an AC surge arrester with a discharge gap, comprising an arrester body 1, a support 2, a current-guiding ring 3, and an insulator 4. The current-guiding ring 3 is fixedly installed on the top of the arrester body 1. When an overvoltage occurs in the power system, the current-guiding ring 3 quickly gathers an electric field through its annular structure, guiding the overvoltage energy to a preset discharge gap. A support rod 5, which is inclined, is fixedly installed between the support 2 and the current-guiding ring 3. The support rod 5 adopts an inclined support design and forms a stable triangular structure with the support 2, which greatly improves the support strength of the current-guiding ring 3 and can effectively resist the influence of external environmental factors such as strong winds, avoiding instability of the discharge gap caused by the current-guiding ring 3 shaking under force.

[0015] The support rod 5 is fixedly installed on the top of the bracket 2 by bolts. Both ends of the support rod 5 are integrally formed with arc-shaped sections 8 for bolts to pass through. The top of the bracket 2 is provided with insertion holes 7 for accommodating bolts. The support rod 5 is integrally formed with a pair of support sections 6 that fit into the flow guide ring 3. The bends of the support rod 5 are all rounded and smooth transitions. The rounded corner treatment at the bends not only eliminates the stress concentration problem caused by the sharp corners of the structure and enhances the fatigue resistance of the support rod 5, but also reduces the turbulent noise generated by the airflow impact during operation and reduces the impact of wind-induced vibration on the overall structure. The support section 6 is symmetrically distributed along the central axis of the top of the support rod 5. The support section 6 has a U-shaped structure, and the inner diameter of the U-shaped structure is adapted to the drainage ring 3. The support section 6 and the drainage ring 3 are fitted together to achieve stable support for the drainage ring 3. The support section 6 adopts a U-shaped structure and the inner diameter is adapted to the drainage ring 3. Combined with the design of symmetrical distribution along the central axis, it can form a ring-like limit for the drainage ring 3, ensuring the stability of the position of the drainage ring 3 during long-term operation and avoiding the deviation of discharge parameters caused by displacement.

[0016] During assembly, first align the U-shaped support section 6 of the support rod 5 with the contraction end of the current-carrying ring 3, and insert the current-carrying ring 3 into the U-shaped groove of the support section 6, so that the current-carrying ring 3 and the support section 6 are fitted together, completing the pre-installation positioning of both. Place the pre-installed current-carrying ring 3 of the support rod 5 at the top installation position of the surge arrester body 1, and fix the two together by bolt tightening, ensuring that the current-carrying ring 3 is installed flat and without looseness. Adjust the tilt angle of the support rod 5 so that the arc-shaped section 8 at its bottom is aligned with the insertion hole 7 at the top of the bracket 2, and pass the bolt through the through hole of the arc-shaped section 8 and the insertion hole 7 of the bracket 2. After confirming that there is no error, tighten the bolt completely to complete the fixing of the support rod 5 and the bracket 2. After the assembly is completed, check the tightness of each connection part to ensure that the tilt angle of the support rod 5 meets the design requirements and that the current-carrying ring 3 does not wobble significantly, completing the overall installation.

[0017] By installing a support rod 5 on the AC surge arrester with a discharge gap, a stable and reliable support can be formed for the current-carrying ring 3, effectively preventing the current-carrying ring 3 from swaying or displacing in complex environments such as strong winds, ensuring the stability and consistency of the discharge gap, and thus guaranteeing the protective performance of the surge arrester. The installation process can be completed simply by fitting and fixing with bolts, making the operation convenient and efficient, and possessing high practicality and promotional value.

[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0019] 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. An AC surge arrester with a discharge gap, comprising an arrester body (1), a bracket (2), a current-guiding ring (3), and an insulator (4), wherein the current-guiding ring (3) is fixedly installed on the top of the arrester body (1), characterized in that: A support rod (5) in an inclined support state is fixedly installed between the bracket (2) and the drainage ring (3). The support rod (5) is integrally formed with a pair of supporting sections (6) that fit into the drainage ring (3). The drainage ring (3) is stably supported by the supporting sections (6) fitting into the drainage ring (3).

2. An AC arrester with discharge gap according to claim 1, characterized in that The support rod (5) is fixedly installed above the bracket (2) by bolts, and the two ends of the support rod (5) are integrally formed with arc-shaped segments (8) for the bolts to pass through.

3. An AC arrester with discharge gap according to claim 2, characterized in that: The top of the bracket (2) is provided with a socket (7) for receiving the bolt.

4. An AC arrester with discharge gap according to claim 1, characterized in that: The supporting section (6) is symmetrically distributed along the central axis at the top of the support rod (5).

5. An AC arrester with discharge gap according to claim 1, characterized in that: The supporting section (6) is a U-shaped structure, and the inner diameter of the U-shaped structure is adapted to the drainage ring (3).

6. An AC arrester with discharge gap according to claim 1, characterized in that: All bends in the support rod (5) are rounded for a smooth transition.

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