CN105590769B - A kind of disconnecting switch - Google Patents

Abstract

The invention relates to an isolating switch, comprising a contact, a contact-side arc-leading rod, a contact finger, and a contact-side arc-leading rod. A protective cover is arranged between the arc rods, and the protective cover connects the contact, the contact finger, the contact-side arc rod and the finger-side arc rod separated. In the present invention, a protective cover is provided between the contact and the arc-leading rod on the contact side or between the contact finger and the arc-leading rod on the contact finger side. The arc strike rod on the head side is separated from the arc strike rod on the contact finger side. When the arc strike rod on the contact side is in conductive contact with the arc strike rod on the finger side, the sparks splashed by the arc are blocked by the protective cover and will not splash on the contacts. And on the contact finger, and then protect the contact and the contact finger.

Description

an isolating switch

technical field

The invention relates to an isolating switch.

Background technique

The isolating switch is an electrical device used to divide and close the circuit in the power system. The isolating switch mainly includes contacts, contact fingers and arc striking devices. The arc striking device includes two arc striking rods. The arc rod and the contact finger side arc rod are connected with the contact, and the contact finger side arc rod is connected with the contact finger. During the closing process of the isolating switch, the two arcing rods are in conductive contact before the contact and the contact finger, and an arc is generated on the two arcing rods, and then the contact and the contact finger are in contact again, that is, the closing action is completed. During the opening process, before the contact is separated from the contact finger, the two arc-leading rods are in conductive contact, and when the contact and the contact finger are separated, the two arc-leading rods are separated. The arc striking device plays the role of protecting the contact fingers and contacts of the isolating switch during the opening and closing process of the isolating switch. In the near future, the sparks generated on the arc striker will splash on the contacts and fingers, causing damage to the contacts and contacts, and affecting the functions of the contacts and fingers.

Contents of the invention

The purpose of the present invention is to provide an isolating switch to solve the technical problem in the prior art that the sparks generated when the arc striker contacts are easily splashed onto the contacts and fingers, causing damage to the contacts and fingers.

To achieve the above object, the present invention adopts the following technical solutions:

An isolating switch, comprising a contact, a contact-side arc-leading rod, a contact finger, and a contact-side arc-leading rod, between the contact and the contact-side arc-leading rod or between the contact finger and the finger-side arc-leading rod A protective cover is arranged between them, and the protective cover separates the contact, the contact finger from the contact-side arc rod and the contact finger-side arc rod when the contact-side arc rod is in conductive contact with the contact finger-side arc rod.

The protective cover is located between the contact and the arc-leading rod on the contact side and is fixedly connected with the arc-leading rod on the contact side.

The protective cover is connected with the arc striker on the contact side through bolts.

The radially opposite sides of the contact are provided with pressure equalizing rings.

Pressure equalizing rings are provided on opposite sides of the contact finger.

The beneficial technical effects of the present invention are: a protective cover is provided between the contact and the arc striker on the contact side or between the contact finger and the arc striker on the contact finger side, and when the isolating switch is closed or opened, the protective cover will touch The head and contact fingers are separated from the arc strike rod on the contact side and the arc strike rod on the contact finger side. When the arc strike rod on the contact side is in conductive contact with the arc strike rod on the contact finger side, the sparks splashed by the arc are blocked by the protective cover. It will not splash on the contacts and fingers, thereby protecting the contacts and fingers.

Description of drawings

Fig. 1 is a schematic diagram of the working principle of opening and closing of the isolating switch embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of the left conductive arm in Embodiment 1 of the isolating switch of the present invention;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is a schematic structural view of the right conductive arm in Embodiment 1 of the isolating switch of the present invention;

Figure 5 is a top view of Figure 4;

Fig. 6 is a schematic structural view of the protective cover in Embodiment 1 of the isolating switch of the present invention.

Detailed ways

Embodiment 1 of the isolating switch of the present invention, as shown in Figures 1 to 6, the isolating switch includes a left conductive arm and a right conductive arm, the left conductive arm is provided with a contact finger 2 and a contact finger side arc striker 3, the contact finger The side arcing rod 3 is located on the radial side of the conductive arm; the right conductive arm is provided with a contact 5 and a contact side arcing rod 6, and the contact side arcing rod 6 is located on one side of the contact 5 and one end is connected to the contactor The head 5 is fixedly connected, and a protective cover 7 is installed between the contact 5 and the arc-leading rod 6 on the contact side. On the side of the contact side arc striker 6 close to the contact, the left conductive arm is fixed with contact finger side pressure equalizing rings 1 on the opposite sides of the contact finger 2, and the right conductive arm is fixed on the opposite sides of the contact 5 in the radial direction. The side is fixed with a pressure equalizing ring on the contact side.

During the closing process of the isolating switch, the left conductive arm and the right conductive arm swing downward, the contact and the contact finger gradually approach, and the arc striking lever on the contact finger side and the arc striking lever on the contact side are in contact with each other before the contact and the contact point guide To achieve conductive contact, due to the action of the arc, a spark discharge phenomenon occurs at the position where the contact arc rod and the finger side arc rod contact. When the contact side arc rod and the contact finger side arc rod conduct conductive contact, the protective cover 7. Separate the contact and finger from the contact side arc rod and the contact finger side arc rod; when sparks are sprayed on the contact side arc rod and the contact finger side arc rod, the protective cover can block the spark It will not splash on the contacts and fingers, thereby protecting the contacts and fingers. During the opening process of the isolating switch, the left conductive arm and the right conductive arm swing upwards, and the contacts and fingers are gradually separated. Before the arc-leading rod on the contact side and the arc-leading rod on the contact finger side are separated, the protective cover is blocked between the contact, the contact finger, the arc-leading rod on the contact side, and the arc-leading rod on the contact finger side, and the contact and finger are protected. Protect.

In the present invention, a protective cover is installed on the arc-leading rod on the contact side, which can effectively avoid damage to the contact fingers and contacts by electric sparks. In other embodiments, the protective cover can be arranged between the contact fingers and the arc-leading rod on the contact finger side. The protective cover can separate the contact and the contact finger from the contact side arc rod and the contact finger side arc rod to realize the protection of the contact and the contact finger.

Claims (4)

1. A disconnector, comprising a contact, a contact side arc striker, a contact finger and a contact finger side arc striker, characterized in that: the disconnector also includes a left conductive arm and a right conductive arm that can swing up and down, so The contact finger and the arc striker on the contact finger side are arranged on the left conductive arm, the arc striker on the contact finger side is located on the radial side of the conductive arm, and the contact and the arc striker on the contact side are arranged on the right conductive arm The arc striker on the contact side is located on the radial side of the contact and one end is fixedly connected to the contact. The left conductive arm and the right conductive arm swing down during the closing process of the disconnector to make the contact and contact fingers gradually approach. During the opening process of the isolating switch, it swings upward to gradually separate the contact and the contact finger. A protective cover is arranged between the contact and the arc strike rod on the contact side. When the finger-side arc-leading rod is in conductive contact, the contact and the contact finger are separated from the contact-side arc-leading rod and the contact-side arc-leading rod. The arc striker on the head side is fixedly connected. 2. The isolating switch according to claim 1, wherein the protective cover is connected to the arc striker on the contact side through bolts. 3. The isolating switch according to claim 1 or 2, wherein pressure equalizing rings are provided on radially opposite sides of the contact. 4. The isolating switch according to claim 1 or 2, characterized in that: pressure equalizing rings are provided on opposite sides of the contact finger.