CN104377052A - Three-station switch used for 220kV composite apparatus - Google Patents

Abstract

The invention discloses a three-position switch for 220kV combined electrical appliances, which comprises a switch main body, a three-position operating mechanism, a grounding movable contact, a grounding static contact, an isolation movable contact and an isolation static contact; The moving contacts are connected; the three-position operating mechanism is installed on the switch main body, and the three-position operating mechanism drives the grounding moving contact and the isolation moving contact to move synchronously on the switch main body, and drives the grounding moving contact to close the grounding static contact. and the isolation moving contact is opened with the isolation static contact, or the isolation moving contact is driven to close with the isolation static contact, and the grounding moving contact is opened with the grounding static contact, or the grounding moving contact is driven to ground The static contact is opened, and the isolated moving contact is opened with the isolated static contact. The invention has a simple structure, the isolation and the grounding switch form a mechanical natural interlock, effectively prevent misoperation, and the overall height is low.

Description

A Three-Position Switch for 220kV Combined Electric Appliance

technical field

The invention relates to the technical field of high-voltage switchgear, in particular to a three-position switch for 220kV combined electrical appliances.

Background technique

In the prior art, the high-voltage equipment needs to be connected to the circuit when it is working, and the high-voltage equipment needs to be grounded when the high-voltage equipment needs to be opened in the case of maintenance. Therefore, the high-voltage equipment needs to be connected to a three-position isolating switch.

As shown in Figures 1 to 3, a three-position switch disclosed in the prior art includes an isolating switch operating mechanism 10, an isolating movable contact 20, an isolating static contact 30, an earthing switch operating mechanism 40, and a grounding movable contact 50 and ground static contact 60. The isolating switch operating mechanism 10 drives the displacement of the isolating movable contact 20, so that the isolating movable contact 20 and the isolating static contact 30 are closed or opened, so that the circuit is connected or disconnected; and the grounding switch operating mechanism 40 drives the grounding movable contact 50 displacement, so that the grounding movable contact 50 and the grounding static contact 60 are closed or opened, so that the high-voltage equipment is grounded or not grounded. The isolating movable contact 20 and the grounding movable contact 50 are respectively driven by two sets of mechanisms, the isolating switch operating mechanism 10 and the earthing switch operating mechanism 40, so they have the following defects:

First, the operating mechanism of the isolating switch is usually located on the upper part of the three-position switch, while the operating mechanism of the grounding switch is located on the lower part of the three-position switch, which makes the height of the entire three-position switch higher, which does not comply with the transportation management regulations, making transportation more troublesome. Each component needs to be disassembled and transported, and then assembled and used after transported to the destination.

Two, the two sets of mechanisms drive the isolation movable contact and the grounding movable contact respectively, making the mechanism more complicated and prone to misoperation.

Contents of the invention

The object of the present invention is to provide a three-position switch for 220kV combined electrical appliances, which has a simple structure, can effectively prevent misoperation, and has a low overall height.

To achieve the above object, the solution of the present invention is:

A three-position switch for 220kV combined electrical appliances, including a switch main body, a three-position operating mechanism, a grounding movable contact, a grounding static contact, an isolated movable contact, and an isolated static contact; the grounded movable contact and the isolated movable contact The three-position operating mechanism is installed on the switch main body, and the three-position operating mechanism drives the grounding moving contact and the isolation moving contact to move synchronously on the switch main body, drives the grounding moving contact and the grounding static contact to close, and The isolation moving contact and the isolation static contact are opened, or the isolation moving contact is driven to close the isolation static contact, and the grounding moving contact is opened from the grounding static contact, or the grounding moving contact is driven to the grounding static contact Open, and the isolated moving contact is opened with the isolated static contact.

Furthermore, the three-position operating mechanism drives the grounding movable contact and the isolation movable contact to move synchronously on the switch main body through the cooperation of the gear and the rack.

Further, a contact seat is arranged in the main body of the switch, and the rack is arranged in the contact seat. One end is installed with a grounding moving contact, and the other end is installed with an isolation moving contact; the gear is connected to the three-station operating mechanism and meshed with the rack. The bit operating mechanism drives the gear to rotate, thereby driving the grounding moving contact and the isolation moving contact to move synchronously.

Further, the three-station operating mechanism is connected with an insulating rod, and a gear is installed on the insulating rod, and the three-station operating mechanism drives the insulating rod to drive the gear to rotate.

Further, the grounding static contact is arranged coaxially with the isolation static contact.

After adopting the above scheme, the grounding moving contact and the isolation moving contact of the present invention are operated by a set of three-position operating mechanism, so as to drive the grounding moving contact and the grounding static contact to close, and the isolation moving contact and the isolation static contact or drive the isolation moving contact and the isolation static contact to close, and the grounding moving contact and the grounding static contact to open, or drive the grounding moving contact and the grounding static contact to open, and the isolation moving contact Separated from the isolated static contact and operated in three positions, it has the following advantages:

1. A set of mechanism drives and operates the isolation moving contact and the grounding moving contact, so that the height of the whole three-position switch is lower, which meets the traffic and transportation management regulations, and the transportation is more convenient. The three-position switch can be transported to the purpose of use as a whole without disassembly and assembly.

Second, a set of mechanism drives and operates the grounding movable contact and the isolating movable contact, which makes the whole three-position switch relatively simple and effectively prevents misoperation.

Description of drawings

Fig. 1 is a schematic diagram of the opening of a three-position switch isolating switch and a grounding switch in the prior art;

Fig. 2 is a schematic diagram showing the closing of the isolating switch of the three-position switch and the opening of the grounding switch in the prior art;

Fig. 3 is a schematic diagram showing the opening of the isolating switch and the closing of the grounding switch of the three-position switch in the prior art;

Fig. 4 is a schematic diagram of the opening of the three-position switch isolating switch and the grounding switch of the present invention;

Fig. 5 is a schematic diagram of the three-position switch isolating switch closing and the grounding switch opening in the present invention;

Fig. 6 is a schematic diagram of the three-position switch isolating switch opening and the grounding switch closing in the present invention.

Label description

Isolation switch operating mechanism 10 Isolation moving contact 20

Isolation static contact 30 Grounding switch operating mechanism 40

Grounding moving contact 50 Grounding static contact 60

Switch body 1 Contact seat 11

Three-position operating mechanism 2 gear 21

Rack 22 insulation rod 23

Grounding moving contact 31 Grounding static contact 32

Isolate the moving contact 41 and isolate the static contact 42.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 4 to Fig. 6, a three-position switch for a 220kV combined electric appliance disclosed by the present invention includes a switch main body 1, a three-position operating mechanism 2, a grounding movable contact 31, a grounding static contact 32, an isolation dynamic Contact 41 and isolated static contact 42 .

The grounding movable contact 31 is connected with the isolated movable contact 41 , that is, the grounded movable contact 31 and the isolated movable contact 41 are displaced synchronously. The three-position operating mechanism 2 is installed on the switch main body 1, and the three-position operating mechanism 2 drives the grounding movable contact 31 and the isolation movable contact 41 to move synchronously on the switch main body 1, and drives the grounding movable contact 31 and the grounding static contact 32 is closed, and the isolated movable contact 41 and the isolated static contact 42 are opened, or the isolated movable contact 41 and the isolated static contact 42 are closed, and the grounded movable contact 31 and the grounded static contact 32 are opened, Alternatively, the grounding movable contact 31 and the grounding static contact 32 are opened, and the isolation movable contact 41 and the isolation static contact 42 are opened.

In this embodiment, the three-position operating mechanism 2 drives the grounding movable contact 31 and the isolating movable contact 41 to move synchronously on the switch main body 1 through the transmission cooperation of the gear 21 and the rack 22 .

The switch main body 1 is provided with a contact seat 11, the rack 22 is arranged in the contact seat 11, one end is installed with a grounding movable contact 31, and the other end is installed with an isolated movable contact 41; the gear 21 is connected with the three-position operating mechanism 2 and is connected with the The rack 22 is engaged, and the three-position operating mechanism 2 drives the gear 21 to rotate, thereby driving the grounding movable contact 31 and the isolating movable contact 41 to displace synchronously.

The three-station operating mechanism 2 is connected with an insulating rod 23, and a gear 21 is installed on the insulating rod 23. The three-station operating mechanism 2 drives the insulating rod 23 to drive the gear 21 to rotate.

The grounding movable contact 31 and the isolating movable contact 41 of the present invention are operated by a set of three-position operating mechanism 2, so that the height of the whole three-position switch is relatively low, which meets the traffic and transportation management regulations, and is more convenient for transportation. The station switch is transported to the destination as a whole without disassembly and assembly; at the same time, a set of mechanism drives and operates the grounding movable contact 31 and the isolation movable contact 41, which makes the whole three-position switch relatively simple and effectively prevents misoperation.

At the same time, the grounding static contact 32 is arranged coaxially with the isolation static contact 42, further reducing the height of the three-position switch.

The above descriptions are only preferred embodiments of the present invention, and are not limitations on the design of this case. All equivalent changes made according to the key points of the design of this case fall within the scope of protection of this case.

Claims (5)

1. A three-position switch for 220kV combined electrical appliances, characterized in that it includes a switch main body, a three-position operating mechanism, a grounding movable contact, a grounding static contact, an isolated movable contact and an isolated static contact; The three-position operating mechanism is installed on the main body of the switch, and the three-position operating mechanism drives the grounding moving contact and the isolation moving contact to move synchronously on the switch main body, driving the grounding moving contact and the grounding static The contact is closed, and the isolation moving contact is opened with the isolation static contact, or the isolation moving contact is driven to close with the isolation static contact, and the grounding moving contact is opened with the grounding static contact, or the grounding moving contact is driven The breaker is opened from the grounding static contact, and the isolation moving contact is opened from the isolation static contact. 2. A three-position switch for 220kV combined electrical appliances as claimed in claim 1, characterized in that: the three-position operating mechanism drives the grounding movable contact and the isolation movable contact on the switch main body through the cooperation of gear and rack transmission Synchronous displacement. 3. A three-position switch for 220kV combined electrical appliances as claimed in claim 2, characterized in that: a contact seat is arranged in the main body of the switch, the rack is arranged in the contact seat, a grounding movable contact is installed at one end, and a grounding movable contact is installed at the other end The isolated moving contact is installed; the gear is connected to the three-position operating mechanism and meshed with the rack, and the three-position operating mechanism drives the gear to rotate, thereby driving the grounding moving contact and the isolating moving contact to move synchronously. 4. A three-position switch for 220kV combined electrical appliances as claimed in claim 2 or 3, characterized in that: the three-position operating mechanism is connected to an insulating rod, and a gear is installed on the insulating rod, and the three-position operating mechanism drives the insulating rod Drive the gear to rotate. 5. A three-position switch for 220kV combined electrical appliances as claimed in claim 1, characterized in that: the grounding static contact and the isolation static contact are arranged coaxially.