CN102360645B - Indirectly inserted ice flashover resistant insulator - Google Patents

Abstract

The invention introduces an intercalated anti-icing flash insulator, which consists of a second fitting (6), a panel (1), a first composite insulator (21), a first glass insulator (31), a second composite insulator (22 ), the second glass insulator (32), the third composite insulator (23), the third glass insulator (33), the fourth composite insulator (24), the equalizing ring (4), the first fitting (5) coaxial line sequentially connected in series. Wherein the cross-sectional diameter of the panel (1) is greater than the cross-sectional diameter of the pressure equalizing ring (4). When in use, the insulator is installed on the tower to suspend the wire. It can block rain, ice and snow, bird droppings and water curtains, reduce pollution, delay icing time, improve anti-icing effect, improve the electric field distribution at the ground potential end of insulators, increase flashover voltage and protect against lightning strikes. It can also reduce the size of the tower window and the line corridor, saving construction investment.

Description

Interleaved anti-ice flash insulator

technical field

The invention belongs to the technical field of electrical engineering, and in particular relates to an intercalated anti-icing flashover insulator used for delaying the bridging time of ice-coated icicles and improving the ice-coated power frequency flashover voltage.

Background technique

In recent years, severe accidents of insulator flashover and tripping of transmission lines caused by icing have occurred frequently, which not only caused huge economic losses, but also seriously affected the safe operation of the power grid and the normal life of the people. Therefore, it is necessary to delay the bridging time of icing and ice slug and increase the flashover voltage of ice-covered power frequency when the transmission line forms icing, which is very necessary to ensure the safe operation of the transmission line. However, the existing technology currently used is to lengthen the length of the insulator string to increase the flashover voltage. This method requires the original tower to be abolished and then re-erected, and even requires the size of the tower window to be increased to increase the area occupied by the line corridor. In this way, the cost of transformation will be high, making it very complicated and difficult to operate, and it cannot be fully and effectively carried out on the power grid, so it cannot be used to protect the operation safety of the power grid.

Contents of the invention

The technical problem to be solved by the present invention is to provide an interleaved anti-icing flashover insulator that delays the ice-covered bridging time and improves the ice-covered power frequency flashover voltage in view of the defects of the known technology. Using the insulator with this structure, The existing lines can be modified to reduce the number of icing flashovers, thereby improving the reliability of power supply; for new lines, the size of the tower window can be reduced, the line corridor can be shortened, and investment can be saved.

The technical solution of the present invention is, referring to accompanying drawing 1, described interleaved anti-icing flash insulator is shown in Figure 1, is made up of second hardware 6, panel 1, first composite insulator 21, first glass insulator 31, second The second composite insulator 22 , the second glass insulator 32 , the third composite insulator 23 , the third glass insulator 33 , the fourth composite insulator 24 , the voltage equalizing ring 4 and the first fitting 5 are sequentially connected in series with the coaxial line. The cross-sectional diameter of the first composite insulator 21 is equal to that of the second composite insulator 22 , the third composite insulator 23 , and the fourth composite insulator 24 . The cross-sectional diameter of the first glass insulator 31 is equal to the cross-sectional diameter of the second glass insulator 32 and the third glass insulator 33 . The cross-sectional diameter of the first glass insulator 31 is larger than the cross-sectional diameter of the first composite insulator 21 . The cross-sectional diameter of the equalizing ring 4 is larger than the cross-sectional diameter of the adjacent third glass insulator 33 . And the cross-sectional diameter of the panel 1 is larger than that of the equalizing ring 4 , so that the overall cross-section of the intercalated anti-icing flash insulator of the present invention is in an inverted "I" shape.

The interleaved anti-icing flashover insulator of the present invention constituted by the above is installed on a pole tower for suspending transmission lines. Its main panel can block the sewage flow formed by rain, snow, bird droppings and pollution on the surface of the pole tower or the water curtain formed when the ice melts, which can reduce the pollution degree of the insulator, delay the ice coating time, improve the anti-icing effect, and improve the ground quality of the insulator. Electric field distribution at the potential end, increase flashover voltage and protect against lightning strikes. The panel can be installed on site, which is convenient for transportation and loading and unloading; and its composite insulator can realize a rich umbrella structure, which can be composed of a variety of umbrella skirts with different diameters according to the set requirements, combined with glass insulators with large diameters to increase the creepage distance , Reduce pollution, extend arc distance, increase arc channel impedance, increase pollution flashover voltage and ice flashover voltage, prolong the time of being bridged and wrapped by ice when ice is covered, and avoid melting ice water bridging umbrella skirts to form water curtains and blocking The arcs are connected in series to form a flashover; the large-diameter glass insulator is hydrophilic and will not deform, which can make the icing uniform, the number of icicles is large and the length of the icicles is short, the icing time is delayed, and the anti-icing effect is improved.

The beneficial effects of the present invention are:

1. Comparing with ordinary insulators with the same structural height in d-level heavily polluted areas and e-level heavily polluted areas, it can delay the ice-covered bridging time by more than 8 to 11 times and increase the ice-covered flashover voltage by 16 times under severe ice-covered conditions ~22%;

2. It can avoid the occurrence of rain flash caused by the rain curtain formed by the pollution on the top of the tower;

3. It can avoid the formation of bird droppings flashover;

4. It can increase the lightning flashover voltage;

5. It can make the ice coating uniform, shorten the length of the ice slush, and improve the anti-icing effect;

6. The window size of the tower and the line corridor can be reduced to save construction investment.

Description of drawings

Fig. 1 is a structural schematic diagram of a specific embodiment of the intercalated anti-icing flash insulator of the present invention, marked as:

1-panel,

21 - first composite insulator,

22 - Second composite insulator,

23-Third composite insulator,

24 - Fourth composite insulator,

31 - first glass insulator,

32 - second glass insulator,

33-Third glass insulator,

4-Equalizing ring,

5- the first fittings,

6-Second fittings.

Detailed ways

Referring to accompanying drawing 1, Fig. 1 shows a specific embodiment of the intercalated anti-ice flash insulator of the present invention. The panel 1, pressure equalizing ring 4, first fitting 5, and second fitting 6 in this embodiment are the anti-icing type pressure equalizing panel, high pressure equalizing ring, and high pressure end produced by China Wenzhou Gulifa Group Co., Ltd. respectively. Fittings, ground potential terminal fittings. The first composite insulator 21 , the second composite insulator 22 , the third composite insulator 23 , and the fourth composite insulator 24 are all composite shed insulators or short composite insulators produced by China Xiangfan State Grid Composite Insulator Co., Ltd. The first glass insulator 31 , the second glass insulator 32 , and the third glass insulator 33 are large diameter aerodynamic glass insulators produced by China Zigong Saidiweier Tempered Glass Insulator Co., Ltd. The size and specifications of this kind of glass insulator are larger than those of the above-mentioned composite shed insulators or short composite insulators produced by China Xiangfan State Grid Composite Insulator Co., Ltd. The cross-sectional diameters of the voltage equalizing ring 4 are larger than the cross-sectional diameters of the first glass insulator 31 , the second glass insulator 32 , and the third glass insulator 33 . The cross-sectional diameter of the panel 1 is larger than the cross-sectional diameter of the pressure equalizing ring 4 . The above panel 1, the first composite insulator 21, the second composite insulator 22, the third composite insulator 23, the fourth composite insulator 24, the first glass insulator 31, the second glass insulator 32, the third glass insulator 33, and the grading ring 4 1. The first fitting 5 and the second fitting 6 are assembled in series according to the above-mentioned technical solutions with reference to the structure shown in accompanying drawing 1, that is, the second fitting 6, the panel 1, the first composite insulator 21, the first glass insulator 31, The second composite insulator 22 , the second glass insulator 32 , the third composite insulator 23 , the third glass insulator 33 , the fourth composite insulator 24 , the equalizing ring 4 and the first fitting 5 are sequentially connected in series with the coaxial line.

The intercalated anti-icing flashover insulator of the present invention with the above-mentioned structure has been proved to have good anti-icing flashing effect, convenient use, safety and reliability, and fully meets the design requirements through tests in the artificial climate laboratory and on-site hanging net operation.

Claims (1)

1. one kind interleaves the anti-icing flash insulator of formula; It is characterized in that; It is connected in series successively and is formed by second gold utensil (6), panel (1), first composite insulator (21), first glass insulator (31), second composite insulator (22), second glass insulator (32), the 3rd composite insulator (23), the 3rd glass insulator (33), the 4th composite insulator (24), grading ring (4), first gold utensil (5) coaxial line; The circle footpath, cross section of wherein said first composite insulator (21) equates with the circle footpath, cross section of the circle footpath, cross section of second composite insulator (22), the 3rd composite insulator (23), the circle footpath, cross section of the 4th composite insulator (24); The circle footpath, cross section of said first glass insulator (31) equates with the circle footpath, cross section of the circle footpath, cross section of second glass insulator (32), the 3rd glass insulator (33); The circle footpath, cross section of said first glass insulator (31) is greater than the circle footpath, cross section of said first composite insulator (21); The circle footpath, cross section of said grading ring (4) is greater than the circle footpath, cross section of said the 3rd glass insulator (33) of vicinity, and circle footpath, the cross section of said panel (1) is greater than the circle footpath, cross section of said grading ring (4).

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