Insulation supporting section for lightning arrester

Abstract

The utility model relates to the technical field of lightning arresters, and discloses an insulating support section for a lightning arrester, which comprises an insulating rod, a first fitting is arranged at the lower part of the insulating rod, a first discharge arm is fixedly connected to the left side of the first fitting, and a first discharge ball is arranged at one end, far away from the first fitting, of the first discharge arm. A second fitting is arranged on the upper portion of the insulating rod, a second discharging arm is fixedly connected to the left side of the second fitting, and a second discharging ball is arranged at the end, away from the second fitting, of the second discharging arm. According to the utility model, the air gap between the second discharge ball and the first discharge ball ensures that the lightning arrester discharges among the discharge balls, and the shortest support insulation distance between the first fitting and the second fitting ensures that the discharge firstly occurs between the second discharge ball and the first discharge ball when voltage is applied to the two ends of the insulation support section of the lightning arrester. And the stability of the discharge path of the insulation support section for the lightning arrester is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lightning arrester technical field especially relates to a lightning arrester is with insulating support section. BACKGROUND

[0002] Lightning arrester is a kind of protection equipment widely used in power system, mainly for protecting electrical equipment from lightning or overvoltage, and the core part of lightning arrester is usually zinc oxide core rod, and zinc oxide has nonlinear resistance characteristics, which can effectively absorb lightning overvoltage and lead it into ground, in order to ensure the stability and reliability of lightning arrester when working, lightning arrester needs to have good insulating support structure in design, to ensure its insulating performance when working, in the design of traditional lightning arrester, especially the insulating support section part, ordinary insulating material is often used, such as glass fiber or polymer insulating material, although it can meet some basic requirements, but under extreme working conditions such as high voltage and strong electric field, partial discharge, insulation breakdown and other problems are likely to occur, which affects the service life of lightning arrester and the stability of system, especially under the action of high-voltage electric field for a long time, traditional insulating material may cause local breakdown due to electric field concentration, thereby affecting the normal work of lightning arrester, and even may cause system failure. SUMMARY

[0003] In order to make up for the above shortcomings, the utility model provides an insulating support section for lightning arrester, which aims to improve the stability of the discharge path of the insulating support section for lightning arrester in the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: an insulating support section for lightning arrester, comprising an insulating rod, a first fitting is arranged at the lower part of the insulating rod, a first discharge arm is fixedly connected to the left side of the first fitting, a first discharge ball is arranged at the end of the first discharge arm away from the first fitting, a second fitting is arranged at the upper part of the insulating rod, a second discharge arm is fixedly connected to the left side of the second fitting, and a second discharge ball is arranged at the end of the second discharge arm away from the second fitting.

[0005] As a further description of the above technical scheme:

[0006] A blind hole is formed at one end of the first fitting and the second fitting, and a threaded hole is formed at the other end of the first fitting and the second fitting.

[0007] As a further description of the above technical scheme:

[0008] The lower part and the upper part of the insulating rod are respectively embedded in the first fitting and the second fitting, and the first fitting and the second fitting are fixedly connected with the insulating rod by crimping.

[0009] As a further description of the above technical scheme:

[0010] The first discharge arm is connected with the first fitting by welding or is integrally formed with the first fitting, and the second discharge arm is fixedly connected with the second fitting by welding or is integrally formed with the second fitting.

[0011] As a further description of the above technical solution:

[0012] The first discharge sphere is fixed with the first discharge arm by screw connection or is integrally formed with the first discharge arm, and the second discharge sphere is fixed with the second discharge arm by screw connection or is integrally formed with the second discharge arm.

[0013] As a further description of the above technical solution:

[0014] The insulating rod is made of epoxy resin glass fiber material.

[0015] As a further description of the above technical solution:

[0016] The shortest distance between the second discharge sphere and the first discharge sphere is a gap distance, and the vertical distance between the first fitting and the second fitting is a shortest support insulation distance.

[0017] The utility model has the advantages of the following beneficial effects:

[0018] 1. In the utility model, the air gap between the second discharge sphere and the first discharge sphere ensures that the lightning arrester discharges between the discharge spheres, and the shortest support insulation distance between the first fitting and the second fitting ensures that, when voltage is applied to both ends of the insulating support section of the lightning arrester, the discharge first occurs between the second discharge sphere and the first discharge sphere, thereby ensuring the stability of the discharge path of the insulating support section of the lightning arrester.

[0019] 2. In the utility model, the zinc oxide core rod is connected with the threaded hole by a bolt to form a lightning arrester core, and then the silicone rubber is attached to the surface of the lightning arrester core by a hot vulcanization bonding process. Since the molecular chain of the silicone rubber is relatively flexible, it is not prone to premature breakdown caused by local electric field concentration, effectively reducing the partial discharge level of the lightning arrester, and not causing internal partial discharge under system power frequency voltage, thereby avoiding the problem of system short circuit fault caused by partial discharge of the insulating support section of the lightning arrester, and improving the stability of the power system.

[0020] 3. In the utility model, the epoxy resin glass fiber material is used to improve the insulation strength of the insulating rod, and the first fitting and the second fitting are fixedly connected with the insulating rod by pressure connection, thereby improving the tensile strength of the insulating support section, and the insulating support section of the lightning arrester can be combined with zinc oxide core rods of different specifications to form a lightning arrester core, thereby having a wide range of applications. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1The utility model provides an overall structure schematic diagram of insulating support section for lightning arrester.

[0022] Legend:

[0023] 1, insulating rod; 2, first fitting; 3, first discharge arm; 4, first discharge ball; 5, second fitting; 6, second discharge arm; 7, second discharge ball. DETAILED DESCRIPTION

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

[0025] Reference Figure 1 An embodiment provided by the utility model: an insulating support section for lightning arrester, comprising an insulating rod 1, the lower part of the insulating rod 1 is provided with a first fitting 2, the left side of the first fitting 2 is fixedly connected with a first discharge arm 3, the end of the first discharge arm 3 away from the first fitting 2 is provided with a first discharge ball 4, the upper part of the insulating rod 1 is provided with a second fitting 5, the left side of the second fitting 5 is fixedly connected with a second discharge arm 6, the end of the second discharge arm 6 away from the second fitting 5 is provided with a second discharge ball 7, the lower part and the upper part of the insulating rod 1 are embedded in the first fitting 2 and the second fitting 5 respectively, the first fitting 2 and the second fitting 5 are fixedly connected with the insulating rod 1 in a crimping mode, the first discharge arm 3 is connected with the first fitting 2 in a welding mode or is integrally formed with the first fitting 2, the second discharge arm 6 is fixedly connected with the second fitting 5 in a welding mode or is integrally formed with the second fitting 5, the first discharge ball 4 is fixed with the first discharge arm 3 in a threaded connection mode or is integrally formed with the first discharge arm 3, the second discharge ball 7 is fixed with the second discharge arm 6 in a threaded connection mode or is integrally formed with the second discharge arm 6, the insulating rod 1 adopts epoxy resin glass fiber material, the shortest distance between the second discharge ball 7 and the first discharge ball 4 is a gap distance, and the vertical distance between the first fitting 2 and the second fitting 5 is the shortest support insulation distance.

[0026] The air gap design between the second discharge sphere 7 and the first discharge sphere 4 ensures that the lightning arrester can effectively discharge between the discharge spheres, avoiding accidental discharge when the voltage is too high. At the same time, by precisely controlling the shortest support insulation distance between the first fitting 2 and the second fitting 5, it is ensured that when the voltage is applied at both ends of the insulation support section of the lightning arrester, the discharge first occurs between the second discharge sphere 7 and the first discharge sphere 4, thereby effectively ensuring the stability and reliability of the discharge path, providing strong protection for the normal operation of the lightning arrester. In addition, by selecting epoxy glass fiber material, the insulation strength of the insulating rod 1 is significantly improved. This high-strength material can effectively withstand the pressure caused by voltage changes, and the first fitting 2 and the second fitting 5 are fixedly connected with the insulating rod 1 through crimping, enhancing the tensile strength of the insulation support section and further improving the stability and durability of the overall structure. In addition, the insulation support section of the lightning arrester and zinc oxide cores of different specifications can be combined to form the core part of the lightning arrester, making it have a wider range of applications, thereby effectively improving the adaptability and working performance of the lightning arrester in various environments and application scenarios.

[0027] With reference to Figure 1 , the first fitting 2 and the second fitting 5 are provided with blind holes at one end, and threaded holes at the other end.

[0028] The zinc oxide core is firmly combined with the threaded hole by bolt connection to form the lightning arrester core, and the silicon rubber is uniformly attached to the surface of the lightning arrester core by using hot vulcanization bonding process. The silicon rubber has a relatively flexible molecular chain structure, which makes it not easy to concentrate local electric field under the action of electric field, thereby avoiding the premature breakdown phenomenon caused by excessive electric field strength, reducing the local discharge level of the lightning arrester. When facing the system power frequency voltage, no local discharge occurs inside the lightning arrester, thereby effectively avoiding the system short circuit fault problem caused by local discharge of the insulation support section, further improving the stability and safety of the power system, effectively prolonging the service life of the equipment, and reducing the risk and downtime caused by equipment failure, ensuring the smooth operation of the power system.

[0029] Working principle: by using bolt connection zinc oxide core rod and threaded hole forms the arrester core, then through the hot vulcanization bonding process makes the silicone rubber adhere to the surface of the arrester core, because the molecular chain of silicone rubber is more flexible, it is not easy to appear local electric field concentration causes premature breakdown, effectively reduces the partial discharge level of arrester, and does not occur internal partial discharge problem under the system power frequency voltage, avoid the arrester because of the local discharge of insulating support section causes system short circuit fault problem, improves the stability of power system, through the air gap between the second discharge ball 7 and the first discharge ball 4, ensure that the arrester discharges between the discharge balls, through the shortest support insulation distance between the first fitting 2 and the second fitting 5, ensure that when the voltage is applied at both ends of the insulating support section of the arrester, the discharge first occurs between the second discharge ball 7 and the first discharge ball 4, ensure the stability of the discharge path.

[0030] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. An insulating support section for a surge arrester, comprising an insulating rod (1), characterized in that: The insulating rod (1) is provided with a first fitting (2) at the lower part, and a first discharge arm (3) is fixedly connected to the left side of the first fitting (2). A first discharge ball (4) is provided at the end of the first discharge arm (3) away from the first fitting (2). The insulating rod (1) is provided with a second fitting (5) at the upper part, and a second discharge arm (6) is fixedly connected to the left side of the second fitting (5). A second discharge ball (7) is provided at the end of the second discharge arm (6) away from the second fitting (5).

2. The insulating support section for a surge arrester according to claim 1, characterized in that: The first fitting (2) and the second fitting (5) have blind holes at one end and threaded holes at the other end.

3. The insulating support section for a surge arrester according to claim 1, characterized in that: The lower and upper parts of the insulating rod (1) are respectively embedded in the first fitting (2) and the second fitting (5), and the first fitting (2) and the second fitting (5) are fixedly connected to the insulating rod (1) by crimping.

4. The insulating support section for a surge arrester according to claim 1, characterized in that: The first discharge arm (3) is connected to the first fitting (2) by welding or is integrally formed with the first fitting (2). The second discharge arm (6) is fixedly connected to the second fitting (5) by welding or is integrally formed with the second fitting (5).

5. An insulating support section for a surge arrester according to claim 1, characterized in that: The first discharge ball (4) is fixed to the first discharge arm (3) by a threaded connection or is integrally formed with the first discharge arm (3). The second discharge ball (7) is fixed to the second discharge arm (6) by a threaded connection or is integrally formed with the second discharge arm (6).

6. An insulating support section for a surge arrester according to claim 1, characterized in that: The insulating rod (1) is made of epoxy resin glass fiber material.

7. An insulating support section for a surge arrester according to claim 1, characterized in that: The shortest distance between the second discharge ball (7) and the first discharge ball (4) is the gap distance, and the vertical distance between the first fitting (2) and the second fitting (5) is the shortest support insulation distance.

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