RU46385U1 - DISCONNECTOR - Google Patents

Abstract

The invention relates to a high-voltage overhead line disconnector comprising a fixed support insulator and a movable support insulator, main contact with a knife and a fork and auxiliary contact with a damping spring and a hook, and a lower stop is attached to the support insulator carrying the damping spring to limit the extreme position of the lower part upward mustache spring. Above the lower stop there is an upper stop to limit the extreme position of the middle and / or upper part of the spring upward pointing whisker, while the distance between the upper stop and the spring upward mustache in the resting position is equal to or greater than the distance between the last and lower stops.

Description

The technical field to which the utility model relates.

The technical solution relates to a high voltage overhead power line disconnector comprising a main contact and an auxiliary contact, which consists of a damping spring and a hook.

State of the art

Disconnectors of this type consist of a fixed support insulator and a movable support insulator, while, as a rule, the movable support insulator is equipped with a knife, and the fixed insulator is equipped with a fork, and these two parts form the main contact. At the same time, the movable support insulator is equipped with a hook, and the stationary one is equipped with a damping spring, which, when the main contact is turned on, is caught by the hook.

The extinguishing spring and the hook form the so-called auxiliary contact, the purpose of which is to prevent the formation of an electric arc when the main contact opens. When disconnected, the main contact opens, the knife comes out of the fork, and these parts are removed from each other. At this moment, the current transfer briefly assumes the auxiliary contact, that is, the hook and the damping spring. Due to the movement of the hook, the spring is bent and tensioned. With a sufficient distance between the parts of the main contact, the quenching spring exits the hook, and an electric arc is created, which lengthens with the further (reverse) movement of the spring due to its voltage. The electric arc goes out either when a sufficient distance is reached, or due to temperature scattering. The extinguishing spring is provided with a lower stop, which defines the extreme position of the lower part of the spring upward pointing.

The advantages of such a system include the high speed of removal of the upward whisker of the spring from the hook, independent of the speed of the entire device (that is, the speed of mutual removal of the supporting insulators).

The disadvantages of this system are that the damping ability is largely dependent on the speed of movement, the shape and length of the damping spring or its upward mustache. At higher speeds, there is a danger of excessive swing, which is only braked by the stop at the bottom. The middle and upper parts of the upward mustache can continue to swing after

reaching extreme position. As a result of the shock and energy of this excessive swing, the upward mustache can return to the ionized region, which can cause repeated ignition of the electric arc.

Utility Model Essence

The problem to which this technical solution is directed is to create a disconnector with a damping spring mechanism that improves the characteristics of the spring system and eliminates the risk of back swinging even at an increased opening speed.

The solution to this problem is achieved by creating a disconnector of the air high-voltage line in accordance with this technical solution. The disconnector in a known manner comprises a fixed support insulator and a movable support insulator, as well as a main contact formed by a knife and a fork, and an auxiliary contact formed by a damping spring and a hook. A lower stop is attached to the supporting insulator carrying the damping spring to limit the extreme position of the lower part of the spring upward pointing.

The essence of the technical solution consists in the fact that the upper stop is located above the lower stop to limit the extreme position of the middle and / or upper part of the spring upward mustache, while the distance between the upper stop and the spring upward mustache in the horizontal plane is equal to or greater than the distance between the last and bottom stop. The advantage of this disconnector is that the risk of excessive swinging and reverse movement of the middle or upper part of the spring upward mustache is eliminated by the upper stop, which absorbs the residual energy of the spring part when the end position is reached.

In a preferred embodiment of the disconnector, the upper stop is attached to the lower stop. Due to this, simpler manufacturing and material savings are achieved, since the upper stop can be smaller than if it is mounted directly on the insulator.

In another preferred embodiment, the upper stop is made U-shaped, and its sides form an acute angle with the spring mustache pointing upward. In this exemplary embodiment, the sidewalls form a lateral guide for the upward-directed spring mustache and prevent possible lateral deviations.

In a further preferred embodiment, the upper and lower stops and sidewalls are made of a steel bar, the lower ends of the sidewalls

attached to the bottom stop. Upon impact of the upward mustache of the spring, the steel bar springs slightly and also extinguishes the energy of excessive rocking.

And finally, it is preferable when the thrust part of the upper stop is equipped with a damping element or is directly made of a material that extinguishes the kinetic energy of the spring mustache directed upward when it hits the upper part of the stop. This solution is especially advantageous with a long spring length or with increased opening speeds.

The technical solution of the disconnector makes it possible to use a damping spring with a significantly longer upward mustache than in known devices. Since the length of the upward mustache is much greater with equal deviation angles, the distance between the contacts in the open state is much greater, which improves the conditions for extinction of the electric arc. The large prestressing of the spring and the high speed of movement ensure the reliability of the fact that when the contacts open, the electric arc does not propagate over the entire travel path, and the arc burning time is minimized. The risk of excessive swaying and reverse movement of the upward mustache is eliminated by the upper stop and its damping function.

List of Drawings

Next, with reference to the accompanying drawings will be described in detail an example implementation of a utility model. In the drawings:

figure 1 depicts a side view of the disconnector in the on position, while its off position is shown by dashed lines,

figure 2 depicts the disconnector in the on position in front view.

Information confirming the feasibility of the utility model. The disconnector according to FIGS. 1 and 2 consists of a fixed support insulator 1 and a movable support insulator 2. In this embodiment, a knife 3 and a hook 6 are attached to the movable insulator, and a plug 4 and a dampener are attached to the fixed insulator 1 spring 5. A pair of knife 3 — fork 4 forms the main contact, and a pair of hook 6 — the damping spring 5 (or its upward-facing mustache 5 ′) forms an auxiliary contact for extinguishing the electric arc when knife 3 and fork 4 are disconnected.

Support insulators can be made in the reverse order.

A lower leaf stop 7 is attached to the supporting insulator 1 carrying the quenching spring 5, which serves to limit the extreme position of the lower part of the spring directed upward whisker 5 '. Attached to the lower stop 7 is the upper stop 8,

which has a U-shape, with the sidewalls 9 of the upper stop 8 attached with their lower ends to the lower stop 7 and form an acute angle with the upward mustache 5 'of the spring 5. The upper stop 8 with the sidewalls 9 is made of a steel bar and has such a height that its persistent transverse part limits the extreme position of the upper part of the upward mustache 5 ′ of the spring 5 at a height of about 2/3 of the length of the mustache. In the horizontal direction, the upper stop 8 is located at a distance L from the upward whisker 5 'of the spring 5 in the resting position. In this case, the distance L is several times greater than the distance l between the lower stop 7 and the upward mustache 5 'of the spring 5 in the resting position. In some exemplary embodiments, a damping element 10 of soft material with damping properties may be mounted on the thrust portion of the upper stop 8.

The disconnector in accordance with this technical solution can be used to disconnect the transmission of power in high-voltage air lines.

Claims (6)

1. A high-voltage overhead line disconnector comprising a fixed support insulator and a movable support insulator, main contact with a knife (3) and a fork (4) and auxiliary contact with a damping spring (5) and a hook (6), and to a support insulator (1, 2), bearing the quenching spring (5), a lower stop (7) is attached to limit the extreme position of the lower part of the upward whisker (5 ') of the spring (5), characterized in that the upper stop (8) is located above the lower stop (7) to limit the extreme position of the middle and / or upper part of the directional top whisker (5 ') of the spring (5), wherein the distance (L) between the upper stop and upward whisker (5') of the spring (5) in the rest position is equal to or greater than the distance (l) between the latter and the lower stop (7). 2. The disconnector according to claim 1, characterized in that the upper stop (8) is attached to the lower stop (7). 3. The disconnector according to claim 1 or 2, characterized in that the upper stop is made U-shaped, and its sides (9) form an acute angle with the upward mustache (5 ’) of the spring (5). 4. The disconnector according to claim 3, characterized in that the upper stop (8) and sidewalls (9) are made of a steel bar, and the lower ends of the sidewalls (9) are attached to the lower stop (7). 5. The disconnector according to claim 4, characterized in that the upper part of the stop (8) is equipped with a damping element (10) of soft material to absorb the kinetic energy of the upward whisker (5 ’) of the spring (5). 6. The disconnector according to claim 4, characterized in that the thrust surface of the upper part of the stop (8) is made of soft material to absorb the kinetic energy of the upward whisker (5 ’) of the spring (5) after abrupt contact.