CN202196623U - Puncture type lightning protection composite insulator - Google Patents

Abstract

The utility model relates to equipment for high-voltage transmission lines, in particular to a puncture-type lightning protection composite insulator, which includes a matching puncture electrode, a pressure plate, and a lower end fitting. There are tooth-shaped piercing teeth for piercing the insulating layer of the wires to form electrical connections. The entire live part is wrapped by an insulating shield. From the lower end of the piercing electrode to the upper end of the lower fitting, there are discharge gap devices, aluminum Gaskets and metal oxide resistors, the lower end of the piercing electrode is in close contact with the upper end of the discharge gap device, the lower end of the metal oxide resistor is in close contact with the upper end of the lower fitting, and the gap between the lower part of the piercing electrode and the upper part of the lower fitting Part of the whole is wrapped with a weft-free tape layer, and an insulating umbrella cover is wrapped outside the weft-free tape layer. The puncture type lightning protection composite insulator has excellent lightning protection function, electrical contact performance and high mechanical strength, wide application range and long service life.

Description

Piercing type lightning protection composite insulator

technical field

The utility model relates to equipment used for high-voltage transmission lines, in particular to a puncture type lightning protection composite insulator. the

Background technique

Insulators are used in (high-type) high-voltage wire connecting poles (towers), and play two basic functions in overhead transmission lines-fixing wires and preventing current from returning to the ground. These two functions must be guaranteed, and insulators should not be caused by the environment and Otherwise, the insulator will lose its function, which will damage the safe use and operating life of the transmission line. With the insulation transformation of overhead transmission lines, traditionally designed insulator lines are difficult to withstand the effects of direct or induced lightning. Therefore, it is necessary to design insulators with better lightning protection functions. the

Utility model content

The technical problem to be solved by the utility model is to provide a fully insulated puncture type with excellent lightning protection function, good electrical contact performance, hydrophobic performance, anti-aging performance, electric corrosion resistance and high mechanical strength. Lightning protection composite insulator. the

The technical scheme adopted by the utility model to solve the technical problem is: a puncture type lightning protection composite insulator, including a puncture electrode and a pressure plate that are tightened and matched by bolts and nuts, and a lower end fitting, which is installed in the wire slot of the puncture electrode. There are tooth-shaped piercing teeth used to pierce the insulating layer of the wire to form an electrical connection. The entire live part is wrapped by an insulating shield. From the lower end of the piercing electrode to the upper end of the lower fitting, there are discharge gap devices, aluminum Gaskets and metal oxide resistors, the lower end of the piercing electrode is in close contact with the upper end of the discharge gap device, the lower end of the metal oxide resistor is in close contact with the upper end of the lower fitting, and the gap between the lower part of the piercing electrode and the upper part of the lower fitting Part of the whole is wrapped with a weft-free tape layer, and an insulating umbrella cover is wrapped outside the weft-free tape layer. After the puncture-type lightning protection composite insulator is installed and put into use, under normal conditions, the gap of the discharge gap device in the insulator isolates the metal oxide resistor sheet from the system and is in a lower electric field, and does not participate in the lightning protection operation, thereby The service life of the metal oxide resistor is extended; when the voltage exceeds the specified value, the discharge gap flashover discharges, and the metal oxide resistor participates in the work to release the overvoltage. the

The metal oxide resistor is a zinc oxide resistor with excellent nonlinear volt-ampere characteristics. the

The insulating umbrella cover is a high-temperature vulcanized silicone rubber umbrella cover with good water-repellent performance, aging resistance and electric corrosion resistance. the

The insulating umbrella cover is designed in an overlapping structure of large and small sheds, so as to improve the ability of the umbrella cover to prevent pollution flashover of the transmission line. the

The beneficial effects of the utility model are: the puncture type lightning protection composite insulator has excellent lightning protection function, and has excellent electrical contact performance, hydrophobic performance, anti-aging performance, electric corrosion resistance and high mechanical strength, the product Full insulation, easy installation, wide application range and long service life. the

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described. the

Fig. 1 is a structural representation (partial section) of the utility model. the

In the figure: 1. Puncture electrode 1-1. Tooth-shaped puncture teeth 2. Pressing plate 3. Lower end fittings 4. Insulation shield 5. Discharge gap device 6. Aluminum gasket 7. Metal oxide resistor 8. No weft Belt layer 9. Insulated umbrella cover

Detailed ways

A puncture type lightning protection composite insulator, as shown in Figure 1, it includes a puncture electrode 1 and a pressure plate 2 that are tightened and fitted by bolts and nuts, and a lower end fitting 3. The tooth-shaped piercing tooth 1-1 pierces the insulating layer of the wire to form an electrical connection. The entire live part is wrapped by an insulating shield 4, and a discharge gap is arranged in sequence from the lower end of the piercing electrode 1 to the upper end of the lower fitting 3 The device 5, the aluminum gasket 6 and the metal oxide resistor 7, the lower end of the puncture electrode 1 is in close contact with the upper end of the discharge gap device 5, the lower end of the metal oxide resistor 7 is in close contact with the upper end of the lower fitting 3, and the puncture electrode The part between the lower part of 1 and the upper part of the lower fitting 3 is entirely wrapped with a latitude-free tape layer 8, and an insulating umbrella sheath 9 is wrapped outside the latitude-free tape layer 8. After the puncture-type lightning protection composite insulator is installed and put into use, under normal conditions, the gap of the discharge gap device in the insulator isolates the metal oxide resistor sheet from the system and is in a lower electric field, and does not participate in the lightning protection operation, thereby The service life of the metal oxide resistor is extended; when the voltage exceeds the specified value, the discharge gap flashover discharges, and the metal oxide resistor participates in the work to release the overvoltage. the

The metal oxide resistor 7 is a zinc oxide resistor with excellent nonlinear volt-ampere characteristics. The insulating umbrella cover 9 is made of high-temperature vulcanized silicone rubber material with good water repellency, anti-aging performance and electrical corrosion resistance, and is designed into an overlapping structure of large and small sheds to improve the anti-pollution of the insulating umbrella cover on the transmission line flash ability. the

The puncture type lightning protection composite insulator product is especially suitable for power distribution 6kV, 10kV, 15kV, 17kV, 20kV insulated wires. the

Claims (4)

1. A puncture-type lightning protection composite insulator, characterized in that: it includes a puncture electrode (1) and a clamping plate (2) that are tightened and matched by bolts and nuts, and a lower end fitting (3), where the puncture electrode (1) There are tooth-shaped piercing teeth (1-1) for piercing the insulation layer of the wires to form electrical connections in the wire slot, and the entire live part is wrapped by an insulating shield (4), from the lower end of the piercing electrode (1) to the lower end A discharge gap device (5), an aluminum gasket (6) and a metal oxide resistance sheet (7) are arranged successively between the upper ends of the fittings (3), and the lower end of the piercing electrode (1) and the discharge gap device (5) The upper end of the metal oxide resistance sheet (7) is in close contact with the upper end of the lower end fitting (3), and the part from the lower part of the piercing electrode (1) to the upper part of the lower end fitting (3) is completely wrapped with or without The weft tape layer (8) is covered with an insulating umbrella cover (9) outside the weft tape layer (8). 2. The puncture type lightning protection composite insulator according to claim 1, characterized in that: the metal oxide resistor (7) is a zinc oxide resistor. 3. The puncture type lightning protection composite insulator according to claim 1, characterized in that: the insulating shed (9) is a high-temperature vulcanized silicone rubber shed. 4. The puncture-type lightning protection composite insulator according to claim 1, characterized in that: the insulating shed (9) has a structure of overlapping sheds of large and small sheds. the