CN201298408Y - A birds droppings proofing insulator - Google Patents

Abstract

The utility model discloses an insulator for preventing bird droppings, which comprises a mandrel, an umbrella group outside the mandrel, an upper metal accessory arranged on the upper part of the mandrel, a lower metal accessory at the lower part of the mandrel, and a compound equalizing ring for preventing bird droppings , the anti-bird droppings composite equalizing ring includes an upper equalizing ring and a lower equalizing ring; the lower equalizing ring is located above the lower metal attachment on the lower part of the mandrel; the upper equalizing ring is located below the upper metal attachment on the upper part of the mandrel, and The inner surface of the upper equalizing ring is bowl-shaped, on which polytetrafluoroethylene material is attached, and the diameter of the outer edge of the bowl-shaped upper equalizing ring is larger than that of the umbrella group and the lower equalizing ring. The inner surface of the upper pressure equalizing ring of the utility model is bowl-shaped, and its inner surface is coated with polytetrafluoroethylene non-stick material. Dry bird droppings can be blown away. When it falls into the rain, the guano is diluted by the rain and flows out of the conduit, which can not only prevent the flashover caused by polluting the insulator, but also prevent the flashover caused by the guano.

Description

An insulator against bird droppings

technical field

The utility model relates to a rod-shaped insulator, in particular to an insulator capable of preventing bird droppings.

Background technique

The rod-shaped suspension composite insulator has many advantages such as light weight, high strength, good hydrophobicity on the surface of silicone rubber, and good hydrophobic mobility, so that the pollution layer on the surface of the insulator also has good hydrophobicity and high pollution flashover voltage. , has been widely recognized by my country's electric power sector and has begun to be used in large quantities, but it is worth noting that this composite insulator cannot overcome the guano flashover caused by birds staying on the composite insulator to defecate. Under the action of the earth's attraction, it is stretched into a very thin "guano wire", which directly short-circuits the upper and lower equalizing rings. The reason for guano flashover is that the structure of the existing pressure equalizing ring is not reasonable enough. The upper ring is a circular ring bent from an iron pipe of about Φ12--20mm, which provides a good standing condition for the birds, often with their heads facing Standing on the equalizing ring outside, the "bird droppings wire" passes through the equalizing ring and close to the edge of the insulator umbrella during defecation, which seriously distorts the electric field distribution of the insulator, so flashover is more likely to occur; If the pressure ring is installed in reverse, the electric field distribution of the insulator is worse than that without the voltage equalizing ring, and guano flashover is more likely to occur; the flashover distance of the upper and lower voltage equalizing rings is smaller.

The patent number of the Chinese utility model open butt joint pressure equalizing ring is 99249547.4, and the name is the butt joint pressure equalizing ring. It overcomes the shortcomings of the existing pressure equalizing rings and reduces the various accident rates. Many times of "bird droppings flashover", after investigation and analysis and experimental research, this is mainly because the "bird droppings wire" formed when standing on the cross arm above the insulator defecates and distorts the electric field of the insulator when it passes through the outer edge of the voltage equalizing ring distribution, resulting in a direct discharge between the upper and lower equalizing rings.

Contents of the invention

The purpose of the utility model is to provide an insulator which can effectively prevent bird droppings without causing flashover of bird droppings.

In order to achieve the above object, the utility model adopts the following technical solutions:

The utility model comprises a mandrel, an umbrella group outside the mandrel, an upper metal attachment arranged on the upper part of the mandrel, a lower metal attachment on the lower part of the mandrel and an anti-bird droppings composite pressure equalizing ring. The above-mentioned anti-bird droppings composite pressure equalizing ring includes The upper equalizing ring and the lower equalizing ring; the lower equalizing ring is located above the lower metal attachment on the lower part of the mandrel; the upper equalizing ring is located below the upper metal attachment on the upper part of the mandrel, and the inner surface of the upper equalizing ring is bowl-shaped shape, with polytetrafluoroethylene material attached to its inner surface, the outer edge diameter of the bowl-shaped upper pressure equalizing ring is greater than the outer edge diameter of the umbrella group and the lower equalizing pressure ring.

A through hole is arranged at the bowl bottom of the bowl-shaped upper pressure equalizing ring, and the through hole is connected with a conduit whose length is greater than the outer edge radius of the umbrella group and the lower pressure equalizing ring.

There are two left and right symmetrical through holes on the bowl bottom of the bowl-shaped upper pressure equalizing ring, and the two through holes are connected with a conduit respectively, and the length of the conduit is greater than the outer edge radius of the umbrella group and the lower pressure equalizing ring.

The diameter of the upper pressure equalizing ring is at least 100 mm larger than the outer diameter of the umbrella group and the lower pressure equalizing ring, forming a distribution of pressure equalizing rings with a large upper part and a smaller one at the lower part.

In the utility model adopting the above-mentioned technical solution, the upper end of the insulator is provided with a large-diameter upper voltage equalizing ring, which not only makes the electric field of the insulator more uniform along the axial direction of the insulator, but also has a good shielding effect on the metal accessories at the end of the insulator, improving The initial corona voltage and power frequency discharge voltage of the insulator can protect the insulator from being burned out when the insulator flashover is caused by irresistible external factors such as lightning strikes. At the same time, it is also an anti-bird droppings pollution insulator and an anti-icing bridging insulator shed protective cover. In addition, since the inner surface of the upper equalizing ring of the utility model is bowl-shaped, and its inner surface is coated with polytetrafluoroethylene non-stick material, when thicker bird droppings fall on it for a period of time after the bird droppings dry , the wind can blow away the dried bird droppings. When it rains, the guano is diluted by the rain and flows out of the conduit, which can prevent the guano from directly dripping on the shed of the insulator, pollute the insulator and cause flashover, and prevent the guano from leaking from the outer edge of the grading ring of the adjacent insulator. The flashover caused by dripping makes the power transmission more reliable.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

As shown in Figure 1, the utility model includes a mandrel 1, an umbrella group 2 outside the mandrel 1, an upper metal attachment 3 arranged on the upper part of the mandrel, a lower metal attachment 4 at the lower part of the mandrel and an anti-bird droppings composite pressure equalizing ring .

In the present utility model, the anti-bird droppings composite pressure equalizing ring includes an upper pressure equalizing ring 5 and a lower pressure equalizing ring 6 . The lower equalizing ring 6 is located above the lower metal attachment 4 at the bottom of the mandrel 1 . The upper equalizing ring 5 is located below the upper metal attachment 3 on the upper part of the mandrel 1, and the inner surface of the upper equalizing ring 5 is in a bowl shape, which is formed by docking two skeletons with the same structural size to form a bowl shape. The inner surface of the bowl-shaped upper pressure equalizing ring 5 is attached with polytetrafluoroethylene non-stick material, so the bird droppings falling on it can not stick on the upper equal pressure ring 5 . When the guano falls on it for a period of time and the guano dries, the wind can blow away the dried guano.

And in the utility model, the diameter of the outer edge of the bowl-shaped upper equalizing ring 5 is greater than the outer edge diameter of the umbrella group 2 and the lower equalizing ring 6, that is, the diameter of the upper equalizing ring 5 is at least smaller than that of the umbrella group 2 and the lower equalizing ring. The diameter of the outer edge of the pressure ring 6 is 100mm larger, forming a distribution of pressure equalizing rings with a large top and a small bottom. In addition, the diameter of the upper equalizing ring 5 should be larger than 300mm, and can be 400mm, 600mm or even larger. This will not only make the electric field of the insulator more uniform along the axis of the insulator, but also have a good shielding effect on the metal attachments at the end of the insulator, and increase the initial corona voltage and power frequency discharge voltage of the insulator. It can protect the insulator from being burned out when flashover is caused by external factors. At the same time, it is also a protective cover for preventing bird droppings from polluting insulators and preventing ice bridging insulators.

Can also have a through hole at the bowl bottom of pressure equalizing ring 5 on the bowl shape in addition, through hole is connected with conduit 7, and the length of conduit 7 is greater than the outer edge radius of umbrella group 2 and lower equalizing pressure ring 6. In addition, two symmetrical through holes on the left and right can also be opened on the two symmetrical structures of the bowl-shaped upper pressure equalizing ring 5, and the two through holes are respectively connected with a conduit, and the length of the conduit is greater than that of the umbrella group 2 and the lower average. The outer edge radius of the pressure ring 6. When it rains, the thick bird droppings are diluted by the rainwater, and then flow out from the conduit 7 through the through hole, which can prevent the bird droppings from directly dripping on the shed of the insulator, pollute the insulator and cause flashover, and prevent the bird droppings from approaching The flashover caused by the dripping of the outer edge of the grading ring of the insulator makes the power transmission more reliable.

Claims (4)

1. An insulator for preventing bird droppings, which includes a mandrel (1), an umbrella group (2) outside the mandrel (1), an upper metal attachment (3) arranged on the upper part of the mandrel, and a lower metal attachment at the lower part of the mandrel The attachment (4) and the anti-bird droppings composite pressure equalizing ring are characterized in that: the anti-bird droppings composite pressure equalizing ring includes an upper pressure equalizing ring (5) and a lower pressure equalizing ring (6); The ring (6) is located above the lower metal attachment (4) on the lower part of the mandrel (1); the upper equalizing ring (5) is located below the upper metal attachment (3) on the upper part of the mandrel (1), and the upper The inner surface of the pressure equalizing ring (5) is bowl-shaped, and polytetrafluoroethylene material is adhered to its inner surface, and the diameter of the outer edge of the pressure equalizing ring (5) on the bowl is greater than that of the umbrella group (2) and the lower equalizing pressure ring ( 6) The diameter of the outer edge. 2. An insulator for preventing bird droppings according to claim 1, characterized in that: a through hole is opened at the bottom of the bowl of the bowl-shaped upper equalizing ring (5), and the through hole is connected to the conduit (7). connected, the length of the conduit (7) is greater than the outer edge radius of the umbrella group (2) and the lower equalizing ring (6). 3. The bird droppings-proof insulator according to claim 1, characterized in that two symmetrical through-holes are opened on the bottom of the bowl-shaped upper pressure equalizing ring (5), and the two through-holes are respectively It is connected with a conduit, and the length of the conduit is greater than the outer edge radius of the umbrella group (2) and the lower equalizing ring (6). 4. The bird droppings-proof insulator according to claim 1, characterized in that: the diameter of the upper equalizing ring (5) is at least smaller than the outer diameter of the umbrella group (2) and the lower equalizing ring (6). The diameter of the edge is 100mm larger, forming a distribution of pressure equalizing rings with a large top and a small bottom.

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