Antifouling post insulator

Abstract

The utility model discloses an antifouling post insulator, which comprises a metal accessory, a cement adhesive, a porcelain piece and an umbrella skirt, and the two ends of the porcelain piece are glued in the metal accessory by the cement adhesive. An annular creepage extender protruding downwards is adhered to the lower portion of each umbrella skirt of the porcelain piece. According to the utility model, the creepage distance of the post insulator can be increased by using the creepage extender, and the electrical performance of the post insulator is improved; the good hydrophobicity of the silicone rubber material enables rainwater to form water drops on the creepage distance increasing surface, and as dirt dissolved in the water drops is discontinuous, the probability of leakage current formation is further reduced, and the dirt flashover voltage of the post insulator is improved. The utility model has the advantages of simple process and low cost, and improves the qualified rate of products.

Description

Technical Field

[0001] The utility model relates to an anti-pollution type post insulator, in particular to a post insulator for a transformer substation. Background Art

[0002] With the rapid development of the economy and society, my country's ultra-high voltage and UHV power systems are also developing and expanding. In recent years, higher voltage post insulators have been widely used in UHV converter stations to ensure the safe operation of the power system. However, the introduction of higher voltage post insulators also puts forward higher requirements on the electrical performance and anti-pollution ability of post insulators.

[0003] In high-voltage power transmission systems, external insulation flashover accidents have become one of the key factors affecting their safe operation. Outdoor post insulators with surface contamination are prone to flashover when exposed to severe weather conditions, such as heavy rain and fog, causing serious external insulation flashover accidents in converter stations. To solve the above problems, a deep-ribbed umbrella-shaped post insulator is currently used. It is a deep-ribbed umbrella structure. Although this deep-ribbed umbrella structure can reduce the unsafe factors of insulators in harsh environments, the deep ribs and umbrella skirts of the deep-ribbed umbrella are integrated porcelain parts, and the qualified rate of product manufacturing is not very high, which wastes materials and increases costs. Summary of the invention

[0004] In view of the above problems, the purpose of the utility model is to provide a pollution-proof post insulator, which has a creepage skirt bonded under the porcelain shed to prevent pollution such as rain splashes, thereby improving the safety of the post insulator in operation.

[0005] In order to achieve the purpose of this utility model, the following technical solutions are adopted:

[0006] A pollution-proof post insulator comprises a metal accessory, cement adhesive, a porcelain piece and a shed. The two ends of the porcelain piece are glued in the metal accessory by cement adhesive. The shed and the porcelain piece are integrated. The shed is located at the outer edge of the porcelain piece. A downwardly protruding annular climbing skirt is bonded under each shed of the porcelain piece.

[0007] The climbing skirt is made of silicone rubber material.

[0008] The climbing-enhancing skirt is bonded to the umbrella skirt by a silane coupling agent.

[0009] The number of climbing skirts is 1-4 circles.

[0010] The umbrella skirt of the porcelain piece is an equal-diameter umbrella.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] Compared with the traditional deep-edge umbrella-shaped porcelain post insulator, the creepage skirt replaces the traditional deep-edge umbrella, which reduces the processing difficulty of porcelain parts and improves the qualified rate of products. The process is simple and the cost is low. Compared with the ordinary umbrella-shaped post insulator, the creepage skirt is bonded on the lower surface of the umbrella skirt. The good hydrophobicity of the silicone rubber material with strong hydrophobicity can minimize the probability of raindrops forming on the surface of the creepage distance. Since the dirt dissolved in the water droplets is discontinuous, the leakage current is prevented from forming. The setting of the creepage skirt increases the creepage distance of the post insulator, and on the other hand, it improves the ability of the post insulator to prevent rain splash and other dirt, so that the post insulator body can reduce the accumulation of dirt such as rainwater and dust, ensuring the insulation performance of the post insulator and the normal operation of the power facilities. While increasing the creepage distance, the pollution flashover voltage of the post insulator is increased, ensuring the electrical performance of the post insulator and the safe operation of the converter station. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the anti-pollution type post insulator of the utility model.

[0014] Symbols in the figure: 1. Metal accessories; 2. Cement adhesive; 3. Porcelain parts; 4. Umbrella skirt; 5. Climbing skirt. DETAILED DESCRIPTION

[0015] The specific implementation scheme of the utility model is described in detail below with reference to the accompanying drawings:

[0016] like Figure 1 As shown, the utility model is a pollution-proof post insulator, comprising a metal accessory 1, a cement adhesive 2, a porcelain part 3 and an umbrella skirt 4. The two ends of the porcelain part 3 of the post insulator are glued in the metal accessory 1 by the cement adhesive 2, the umbrella skirt 4 and the porcelain part 3 are integrated, and the umbrella skirt 4 is located at the outer edge of the porcelain part 3. The umbrella skirt 4 of the porcelain part 3 is an equal-diameter umbrella. The above structure is the same as that of the existing insulator. In terms of design, the pollution-proof post insulator of the utility model is also the same as the prior art: first determine the size of the post insulator according to the voltage level, such as parameters such as height, main body diameter, umbrella diameter and umbrella spacing.

[0017] The innovative design of the utility model is that a downwardly protruding annular creepage-enhancing skirt 5 is bonded under each shed 4 of the porcelain part 3. The creepage-enhancing skirt 5 is made of silicone rubber material, and is bonded to the shed 4 by a silane coupling agent. The bonding is very strong and will not come apart due to rain or snow. According to the different sizes of various specifications of post insulators, the number of creepage-enhancing skirts 5 on the shed 4 is 1-4 turns.

[0018] Compared with the traditional deep-edge umbrella post insulator, the anti-pollution post insulator of the utility model retains its deep-edge umbrella shape, but solves the shortcomings of the traditional deep-edge umbrella post insulator that the umbrella skirt is difficult to process and the qualified rate of finished products is low.

Claims

1. A pollution-proof post insulator, comprising a metal accessory (1), a cement adhesive (2), a porcelain piece (3) and an shed (4), wherein both ends of the porcelain piece (3) are glued to the metal accessory (1) by the cement adhesive (2), the shed (4) and the porcelain piece (3) are integrated, and the shed (4) is located at the outer edge of the porcelain piece (3); characterized in that: A downwardly protruding annular climbing-increasing skirt (5) is bonded under each umbrella skirt (4) of the porcelain piece (3).

2. The anti-pollution post insulator according to claim 1, characterized in that: The climbing-enhancing skirt (5) is made of silicon rubber material.

3. The anti-pollution post insulator according to claim 1 or 2, characterized in that: The climbing-enhancing skirt (5) is bonded to the umbrella skirt (4) by a silane coupling agent.

4. The anti-pollution post insulator according to claim 1, characterized in that: The number of the climbing-increasing skirt (5) is 1-4 circles.

5. The anti-pollution post insulator according to claim 1, characterized in that: The umbrella skirt (4) of the porcelain piece (3) is an isodiameter umbrella.

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