RU29612U1 - High Voltage Pin Insulator - Google Patents

Description

High Voltage Pin Insulator

The utility model relates to the field of electrical engineering and is intended for fastening wires in high voltage lines.

Known pin insulator made in the form of a part of an insulating material consisting of a hollow conical base with a central hole for mounting the pin, the head in the form of a buckwheat sphere with an open groove for fastening the wire and ring conical ribs located between the head and base (RU 16883 U1, cl H01B 17 / 20,2001).

The closest in technical essence is a high-voltage pin linear insulator, containing a rod of insulating material with an internal cavity and with an upper terminator, provided with a groove on the end surface for the current lead and an annular groove on the side surface for the current-carrying reinforcement, and a part with ring ribs covering the outer surface of the rod made of tracking resistant material. (RU 2170465, IPC 7 NOSH 17/20, 07/10/2001).

In the known device, the conductive coating is located on the outer surface of the external terminal. However, the inner surface of the rod is destroyed by erosion arising from the action of leakage currents.

The disadvantages of the known insulators are the low service life and lack of reliability caused by low mechanical strength and erosion of the inner surface of the rod.

The objective of the utility model is to increase the life of the insulator and its reliability by increasing mechanical strength, reducing leakage currents and protecting the inner cavity of the rod from erosion and moisture.

The problem is achieved due to the fact that the high-voltage pin linear insulator containing a rod of insulating material with an internal cavity and with an upper terminal, and a part with ring ribs covering the outer surface of the rod, made of a tracking-resistant material, is equipped with a protective shield mounted on the inner surface of the rod a cylinder of conductive material.

Private significant features is that the length of the glass may be related to the length of the rod from 1: 2 to 1: 5.

The upper end of the protective cylinder can be made in the form of a skirt, providing galvanic contact with the grounding pin, placed in the cavity of the rod.

The insulator can be equipped with a lower terminal installed on the lower ends of the rod and parts with annular ribs in contact with the lower edge of the glass.

The upper terminal can be made in the form of a separate part and mounted on the upper ends of the rod and the part with annular ribs.

The essence of the utility model is illustrated in the drawing, which shows a General view of the insulator.

The insulator contains a rod 2 with an internal cavity, through a standard adapter cap 4 mounted on the pin 6. The outer surface of the rod covers part 5 with annular ribs, providing the necessary path length of the leakage currents.

At the ends of the rod 2 and part 5, the upper 1 and lower 3 terminators are installed. On the end surface of the terminal 1, a groove 7 is made to accommodate the current-carrying wire. On the side surface of the upper terminal 1, an annular groove 8 is made for the current-carrying reinforcement, for example, in the form of a wire knit securing the current-carrying wire to the insulator. Rod 2 is made of mechanically strong

. material especially for bending and impact loads. To such

materials include oriented fiberglass, fiber-filled thermoplastics, for example fiber-filled polybutylene terephthalate. A protective cylinder is made in the inner cavity of the rod 2 in its lower part without a gap, made of conductive material in the form of a glass 9 turned upside down with a central hole made in the form of a skirt 10. The glass 9 is pressed with its bottom against the base of cap 4 without a gap, and it the lower edge is located at the same level with the lower end of the rod and is in contact with the lower terminal 3. The glass 9 can be pressed, welded or glued to the rod 2. In the lower terminal 3 there is a central hole for the installation of the pin 6. Skirt 10, the sleeve 9 provides galvanic contact with a pin 6.

Part 5 is made of leakage-resistant current, i.e. tracking resistant material (polymer).

Such materials include silicone rubber, materials of the class of polyolefins and their copolymers containing powdered mineral fillers.

The insulator works as follows.

The current-carrying wire is connected to metal fittings that fasten it to the insulator. The outer surface of the rod 2 is protected from erosion by leakage currents with part 5 with annular ribs providing the necessary path length of the leakage currents, and the inner surface of the rod 2 is protected from erosion by leakage currents and moisture by a glass 9 through which leakage currents flowing from the lower terminal to the grounding pin 6.

This ensures an increase in the life of the insulator and its reliability. The length of the glass is determined by the length of the rod.

3

For better galvanic contact of the lower terminal with the pin 6 can be installed screw 11.

Thus, the insulator allows you to withstand as much as possible any effect on bending, improves impact strength, eliminates erosion of the inner surface by reducing leakage currents.

IWU ff formula

Claims (5)

1. A high-voltage pin linear insulator comprising a rod of insulating material with an internal cavity and with an upper terminal, and a part with ring ribs covering the outer surface of the rod, made of tracking-resistant material, characterized in that a protective cylinder is made of a conductive material on the inner surface of the rod without a gap material. 2. The insulator according to claim 1, characterized in that the upper end of the protective cylinder is made in the form of a skirt designed for galvanic contact with the grounding pin. 3. The high voltage pin linear insulator according to claim 1, characterized in that the length of the protective cylinder refers to the length of the rod from 1: 2 to 1: 5. 4. The high-voltage pin linear insulator according to claim 1, characterized in that it is equipped with a lower terminal installed on the lower ends of the rod and parts with annular ribs, the lower end of the protective cylinder in contact with the lower terminal. 5. The high-voltage pin linear insulator according to claim 1, characterized in that the upper terminal is installed on the upper ends of the rod and parts with annular ribs.