CN101325104B - Lightning protection post insulator - Google Patents

Abstract

The invention discloses a lightning protection support insulator, which comprises an insulating hood and a wire clipping hardware fitting which is arranged inside the insulating hood and is composed of an upper pressing block and a lower pressing block. The lightning protection support insulator is characterized in that the lightning protection support insulator also comprises a starting rod connected with the side end of the wire clipping hardware fitting, a insulator with both ends being respectively connected with the lower end of the wire clipping hardware fitting and a cross arm, and a lower steel pin arranged inside the insulator and close to one end of the cross arm. The lightning protection support insulator achieves the combination of the support insulator and an arc protection hardware fitting, and has the characteristics of insulation, conducting wire supporting, arc protection, simplified circuit, low fabricating cost and reusability.

Description

Lightning protection post insulator

technical field

The invention relates to an overhead power distribution line of a power system, in particular to a lightning protection post insulator for preventing electric power overhead insulated wires from being broken by lightning.

Background technique

At present, the measures taken at home and abroad to prevent lightning breakage of 1-35KV overhead insulated conductors mainly include installing oxide arresters on overhead insulated conductors, and installing arc-resistant hardware on the load side of post insulators. The former uses a lightning arrester, although the protection effect is good, but the construction and installation are complicated and the investment is large; the latter is an arc-resistant puncture fitting for preventing lightning breakage of overhead insulated wires disclosed in Chinese invention patent 03120004.4, which mainly includes puncture wire clips , arc-resistant electrode, grounded arc-starting electrode and insulating shield, etc. This method has the disadvantage of being easily affected by changes in the load side of the ring network power supply, and can only play the role of arc protection.

In addition, as disclosed in Chinese Utility Model No. 03203469.5 and Chinese Invention Patent No. 200410017514.4, a lightning protection post insulator for overhead insulated cables has the disadvantage that it can prevent the wire from being struck by lightning, but the shed of the insulator will be easily damaged, thereby The lightning protection post insulator cannot be reused.

Contents of the invention

The purpose of the present invention is to provide a lightning protection pillar insulator which not only plays the role of insulating and supporting wires in the power line, but also has the function of arc protection and can be used repeatedly.

The purpose of the present invention is achieved through the following technical solutions:

A lightning protection post insulator, comprising an insulating shield and a wire clamping fitting composed of an upper pressing block and a lower pressing block arranged inside the insulating shielding, and also includes an arc striker connected to the side end of the wire clamping fitting Rod; an insulator whose two ends are respectively connected to the lower end of the clamping fitting and the lower steel leg, the insulator is installed on the cross arm through the lower steel leg; the arc striking rod is bent, and the other end is close to the lower steel leg .

Wherein, the lower surface of the upper pressing block and the upper surface of the lower pressing block are provided with several grooves, and the upper pressing block and the lower pressing block are connected by two bolt inserts and two compression nuts.

Wherein, the groove is provided with piercing teeth.

Wherein, a backup nut is arranged on the compression nut.

Wherein, the arc striking rod is covered with an insulating sleeve.

Wherein, the end of the arc striking rod close to the lower steel foot is a spherical protrusion.

Wherein, a protruding end is provided on the side of the lower steel foot close to the arc striking rod.

The positive progress effect of the present invention is:

A lightning protection post insulator realizes the combination of the post insulator and the arc-proof fitting, and has the characteristics of insulating and supporting wires, preventing arcing, simplifying lines, reducing cost and being reusable; moreover, the insulator is made of composite material, which has good insulation performance and is The electrical distance is large, which improves the anti-pollution level; at the same time, the insulating shield is made of silicon rubber material, which has good insulation performance, anti-aging, and good flame retardant performance.

Description of drawings

Fig. 1 is the sectional view of a preferred embodiment of the present invention;

Fig. 2 is a partial sectional view of the use state of a preferred embodiment of the present invention;

Fig. 3 is a sectional view of another preferred embodiment of the present invention;

Fig. 4 is the three-dimensional schematic view of the lower pressing block in a preferred embodiment of the present invention;

Fig. 5 is the three-dimensional schematic view of upper pressing block in a preferred embodiment of the present invention;

Figure 6 is a sectional view of the piercing teeth in a preferred embodiment of the present invention;

Fig. 7 is a sectional view of an arc striker in a preferred embodiment of the present invention;

Fig. 8 is a perspective view of an insulating shield in a preferred embodiment of the present invention.

Detailed ways

The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

As shown in Figures 1, 2, 4, 5, 6, 7 and 8, a lightning protection post insulator includes an insulating shield 1, an upper pressing block 21 and a lower A clamping fitting 2 composed of a pressing block 22, an arc striker 3 connected to the side end of the clamping fitting 2, an insulator 4 whose two ends are respectively connected to the lower end of the clamping fitting 2 and the lower steel foot 5, the insulator 4 passes through Lower steel foot 5 is installed on the cross arm 6. Equal to the traditional method, the arc striker 3 is preferably facing the outside of the cross arm 6 . When a lightning strike occurs, a flashover discharge is caused between the arc striker 3 and the lower steel foot 5 to form a short circuit channel, and the continuous power frequency arc moves to burn between the arc striker 3 and the steel foot 5 to protect the wire from being burned . Simultaneously the insulator 4 wherein plays the pillar of supporting wire 9, insulation and antifouling effect.

Wherein, the lower surface of the upper pressing block 21 and the upper surface of the lower pressing block 22 are provided with several grooves 27, 28, on which the piercing teeth 26 can be provided as required; when the piercing teeth 26 are provided, there is no need to peel off The insulating layer of the wire 9 can be punctured and energized to avoid water ingress and corrosion of the wire core, which is convenient for installation and construction;

Further, the above-mentioned spikes 26 are made of copper, and the surface is electroplated or permeated to prevent oxidation when copper and aluminum are combined.

Wherein, the upper pressing block 21 and the lower pressing block 22 are connected by two stainless steel bolt inserts 23 and two compression nuts 24 . A backup nut 25 is arranged on the compression nut 24 . The above-mentioned stainless steel bolt is about 10 millimeters in diameter, and the compression nut and the backup nut are about 10 millimeters in diameter. Set the torque value of the torque wrench according to the cross section of the wire and the weather temperature: 20-40Nm, alternately and symmetrically tighten the two compression nuts 24 with the torque wrench. Then tighten the backup nut 25 to prevent the compression nut 24 from loosening.

Wherein, the insulating shield 1 is installed on the outside of the clamping fitting 2, and is made of silicon rubber material, which has good insulating properties, anti-aging properties and flame retardant properties.

Among them, one end of the insulator 4 is installed on the clamping fitting 2, and the other end is installed on the cross arm. It is made of composite material, which has better insulation performance than electric porcelain insulators, and has a large creepage distance, which improves the pollution resistance of the insulator.

In addition, the arc striker 3 is bent, and its other end is close to the lower steel leg 5, and this end is a spherical protrusion 31, which is easier to discharge with the lower steel leg 5 when lightning strikes. An insulating sleeve 32 is sheathed on the outside of the arc striker 3 .

In addition, a protruding end 51 is provided on the side of the lower steel leg 5 close to the arc rod 3 , also for the purpose of making it easier to discharge with the arc rod 3 when lightning strikes.

After adopting the above structure, when the present invention is in use, if a lightning strike occurs, it can not only protect the wire, but also avoid burning the shed 41 on the insulator 4, making it reusable.

Certainly, as shown in FIG. 3 , the arc striker 3 in another embodiment of the present invention is arranged on the other side of the wire clamping fitting 2 , parallel to the wire. The rest of the structure is unchanged.

Claims (7)

1. A lightning protection post insulator, comprising an insulating shield and a wire clamping fitting composed of an upper pressing block and a lower pressing block arranged inside the insulating shielding, characterized in that it also includes a wire clamping fitting An arc striking rod connected to the side end; an insulator connected to the lower end of the clamping hardware and the lower steel leg at both ends, and the insulator is installed on the cross arm through the lower steel leg; the arc striking rod is bent, and the other One end is near the lower steel foot. 2. The lightning protection post insulator according to claim 1, characterized in that the lower surface of the upper pressing block and the upper surface of the lower pressing block are provided with several grooves, and the upper pressing block and the lower pressing block are connected by two bolts The insert is connected with two compression nuts. 3. The lightning protection post insulator according to claim 2, characterized in that the groove is provided with piercing teeth. 4. The lightning protection post insulator according to claim 3, characterized in that a backup nut is provided on the compression nut. 5. The lightning protection post insulator according to claim 1, characterized in that the arc striking rod is covered with an insulating sleeve. 6. The lightning protection post insulator according to claim 1 or 5, characterized in that the end of the arc striking rod close to the lower steel leg is a spherical protrusion. 7. The lightning protection post insulator according to claim 1, characterized in that a protruding end is provided on the side of the lower steel leg close to the arc striker.

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