CN201466635U - A Composite Insulation Tower Insulation Tower Head - Google Patents

Abstract

A Composite Insulation Tower Insulation Tower Head The utility model relates to a composite insulation tower insulation tower head. The specific technical scheme of the utility model is: including single-circuit or double-circuit lines on the same pole, using composite insulation rods and insulators, and overhead wires are fixed on the insulators superior. The insulating tower head includes 3 or 4 composite material insulating rods and 2 to 4 pieces of insulators, the lower 2 insulating rods are on the same horizontal plane as a group, and the upper 1 or 2 insulating rods are cable-stayed structures as a group, One end of 3 or 4 insulating rods is fixed on the pole with a hoop or a flange, and the other ends of the insulating rods are fixed together with bolts, so that the insulating rods form a truss structure. Clips for hanging wires. The utility model has the advantage that it can effectively reduce the arc building rate of the insulator, and further reduce the tripping rate of the line.

Description

A Composite Insulation Tower Insulation Tower Head

technical field

The utility model relates to the technical field of an insulating tower head capable of reducing the arc building rate and the lightning tripping rate, in particular to an insulating tower head of a composite insulating pole tower.

Background technique

At present, the lightning protection measures that have been adopted for the overhead lines of the transmission and distribution network mainly include the installation of lightning conductors, insulators and lightning arresters. The function of the lightning conductor is to receive the lightning, electromagnetically couple with the conductor and shunt the lightning current, but its effect is not obvious. The insulator uses its own electrical and mechanical properties to ensure sufficient insulation between the conductor-crossarm and the conductor-tower. However, for overhead bare conductor lines, after lightning causes the insulator to flashover, the subsequent power frequency freewheeling arc will often damage the insulator; The arc root of the current arc is hindered by the insulation layer, and continues to burn at the breakdown point on the insulated wire, so that the insulated wire will burn out soon. The lightning arrester utilizes the non-linear characteristics of metal oxide resistors to absorb lightning energy, suppress power-frequency continuous current arcing, protect insulators or insulated wires from lightning damage, and at the same time prevent lightning tripping of lines. It is an ideal lightning protection measure , but its cost is higher.

Contents of the invention

The purpose of this utility model starts from improving the insulation level of the tower head, and provides an insulating tower head made of composite materials, which can reduce the arc building rate of insulators, thereby reducing the protection measures for lightning overvoltage of overhead lines that reduce the tripping rate. Occurrence of lightning strike accidents on overhead lines of distribution network.

The specific technical scheme for realizing the utility model is: comprising single-circuit or double-circuit lines on the same pole, using composite insulating rods and insulators, and overhead wires are fixed on the insulators. The insulating tower head includes 3 or 4 composite material insulating rods and 2 to 4 pieces of insulators, the lower 2 insulating rods are on the same horizontal plane as a group, and the upper 1 or 2 insulating rods are cable-stayed structures as a group, One end of 3 or 4 insulating rods is fixed on the pole with a hoop or a flange, and the other ends of the insulating rods are fixed together with bolts, so that the insulating rods form a truss structure. Clips for hanging wires.

3 or 4 insulating rods are made of fiberglass rods, and insulating umbrella covers are arranged on the fiberglass rods.

The insulators are glass, porcelain insulators or composite insulators.

The utility model starts from the perspective of improving the insulation level of the pole tower head itself, and uses the insulating pull rod and the insulator in combination to propose a composite insulation tower head, which can improve the insulation level of the line, reduce the arc building rate and tripping rate, and can be used for lightning protection lines. It can also be used on towers without lightning protection lines.

The utility model has the advantages of:

(1) Set up an insulating cross arm on the tower and use it in combination with a few pieces of insulators to improve the line insulation level and pollution flashover voltage, which can effectively reduce the arc establishment rate of the insulators, thereby reducing the line trip rate.

(2) Utilize the truss structure of cross bars and tie bars to convert the radial force of the bars into axial force, and give full play to the advantages of good tensile properties of FRP.

(3) The structure is simple, the installation is convenient, and compared with ordinary protection measures, the cost is low, the protection effect is good, and the operation does not need maintenance.

Description of drawings

Accompanying drawing 1 is the front view of four bars of the utility model;

Accompanying drawing 2 is the plan view of four bars of the utility model;

Accompanying drawing 3 is the right side view of four rods of the present utility model.

The names of the components in the diagram are as follows:

Connecting hardware-1, tower body-2, fastening bolt/nut-3, hoop a-4, tie rod-5, hoop b-6; insulator-7, cross arm-8, wire clamp-9

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing and embodiment example

In the figure, the hoop a (4) is fastened to the tower body with fastening bolts (3), and the end of the tie rod coupling hardware (1) with a single protruding item is inserted into the clip at the protruding end of the hoop a (4). slot and fix it with fastening bolts (this connection method ensures that the angle of the pull rod in the horizontal direction can be fine-tuned). One end of the tie rod coupling hardware (1) with double extensions is connected with the pull rod (5) and fastened with fastening bolts (this connection ensures that the angle of the pull rod in the vertical direction can be fine-tuned).

Simultaneously, the two ends of the pull rod (5) protrude through long round holes, so that the pull rod can also be fine-tuned in its own axial direction. The other end of the pull rod (5) is fixed on the corresponding hole position of the special connecting hardware (1) by fastening bolts.

Hoop b (6) is fixed by fastening bolt equally with tower body, and an end car of cross arm (8) has external thread, and it is fastened on the end that hoop b (6) protrudes part car and has internal thread hole. The other end is then fixed on the corresponding hole position of the special connecting hardware (1) with fastening bolts.

The outer surfaces of the four (or three) insulating rods in total of the pull rod (5) and the cross arm (8) are covered with insulating sheds. The insulators used in the line are connected to the special connecting hardware (1), and the special connecting hardware (1) is fixed to the corresponding holes of the special connecting hardware (1) through fastening bolts. Wire clamp (9) hangs on the insulator after connecting with fastening bolt and special connection fittings (1). In this way, since the tie rod (5) can be fine-tuned horizontally, vertically and in its own axial direction, the operability of the installation is increased while the installation accuracy is guaranteed, and the impact of the load on the tower body and various components after wiring is also optimized from certain conditions. The impact of the main bearing parts ensures the safety of the tower body and improves the safety factor.

Claims (3)

1. An insulating tower head of a composite pole, used for single-circuit or double-circuit lines on the same pole, using glass or porcelain insulators, and overhead wires are suspended by insulators, characterized in that: the insulating tower head includes 3 or 4 composite material Insulating rods and 2 to 4 pieces of insulators, the lower two insulating rods are at the same level as a group, the upper one or two insulating rods are cable-stayed structures and form a group, and one end of the three or four insulating rods is clamped or clamped. The blue is fixed on the pole, and the other end of the insulating pole is fixed together with bolts, so that the insulating pole forms a truss structure, the insulator is suspended on the fixed end, and the wire is suspended under the insulator with a clamp. 2. The insulating tower head of a composite pole tower according to claim 1, characterized in that: the three or four insulating rods are made of glass fiber reinforced plastic rods, and the glass fiber reinforced plastic rods are provided with insulating umbrella covers. 3. The insulating tower head of a composite tower according to claim 1, characterized in that: said insulators are made of glass, porcelain insulators or composite insulators.

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