CN105761966A - Stepping three-station switch - Google Patents

Abstract

The invention provides a stepping three-position switch, including an operating mechanism, the operating mechanism is connected to a propulsion device through a dynamic seal, the propulsion device is connected to a moving contact, and the static contact and the moving contact are arranged coaxially; the static contact has three , arranged word by word according to the front, middle and back positions. The operating mechanism is a gear transmission structure, which is composed of a master gear and a driven gear meshing with each other. The propulsion device is an insulating screw rod. The dynamic seal converts the operating work generated by the operating mechanism into the kinetic energy of the propulsion device, drives the moving contact to achieve linear motion in the front and rear directions, and connects with the corresponding static contact to realize the functions of "closing", "isolation" or "grounding". The stepping three-position switch provided by the invention has the advantages of simple structure, few parts, convenient manufacture and use, small material requirement, low processing cost, convenient assembly, easy control and reliable performance.

Description

A stepping three-position switch

technical field

The invention relates to a stepping three-position switch, which belongs to the technical field of power transmission and distribution.

Background technique

The three-position switch of gas insulated switchgear has three functions and positions of "closing", "isolation" and "grounding". The stepping operating mechanism pushes the screw to move forward and backward in a straight line to realize the functions of each position.

Specifically, three positions refer to three working positions: 1. The closing position where the main breakout of the isolation switch is connected, 2. the isolation position where the main breakout is separated, and 3. the grounding position on the grounding side. The three-position switch actually integrates the functions of the isolating switch and the grounding switch. It is completed through a moving contact directly connected to the static contact end of the closed isolation fracture or grounding fracture, so that mechanical locking can be realized to prevent the main circuit from being charged. Ground knife, because the moving contact can only be in one position, unlike the traditional isolating switch, the main knife is the main knife, and the ground knife is the ground knife, and misoperation may occur between the two knives. The three-position isolating switch uses a moving contact, and the working position of the moving contact is unique at a certain moment, either in the closing position, or in the isolation position or grounding position, avoiding the possibility of misoperation.

The existing three-position switch based on the knife switch has the following disadvantages: the structure of the switch contact is complicated, the consumption of pure copper is large, the cost of materials and processing is high, and the assembly is troublesome.

Contents of the invention

The technical problem to be solved by the invention is how to simplify the structure of the three-position switch, optimize the design technology of the uniform electric field, reduce the cost of consumables, and improve the convenience of processing and installation.

In order to solve the above technical problems, the technical solution of the present invention is to provide a stepping three-position switch, which is characterized in that it includes an operating mechanism, the operating mechanism is connected to the propulsion device through a dynamic seal, the propulsion device is connected to the moving contact, and the static contact The head and the moving contact are coaxially arranged;

There are three static contacts, arranged in a line according to the front, middle and rear positions.

Preferably, the operating mechanism is a gear transmission structure consisting of a master gear and a driven gear that mesh with each other.

Preferably, the transmission ratio of the main gear and the driven gear is 1:1.

Preferably, the propulsion device is an insulating screw.

Preferably, the operating mechanism and the dynamic seal, and the dynamic seal and the propulsion device are linked by a square hole shaft.

Preferably, the static contact is fixed on the base.

Preferably, among the static contacts, the front and rear position contacts are in the "one" shape, the middle position contact is in the "T" shape, and a fixed distance is maintained between the static contacts.

Preferably, the static contact is a ring contact with built-in contact fingers, and the moving contact is a ring contact.

Preferably, the dynamic seal converts the operating work generated by the operating mechanism into the kinetic energy of the propulsion device, drives the moving contact to achieve linear motion in the forward and backward direction, and connects with the corresponding static contact.

Preferably, through the forward and reverse rotation of the main gear, the driven gear is linked to drive, and then the moving contact is driven forward or backward, and connected with the corresponding static contact to realize "closing", "isolation" or "grounding" Features.

Compared with the prior art, the stepping three-position switch provided by the present invention has the following beneficial effects:

1. The structure is simple, the number of parts is small, and the manufacture and use are convenient;

2. The required materials are small and the processing cost is low;

3. Easy assembly and maintenance;

4. The switch is stepping, easy to control and reliable in performance.

Description of drawings

Fig. 1 is a schematic structural diagram of a stepping three-position switch provided in this embodiment.

detailed description

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Figure 1 is a schematic structural diagram of the stepping three-position switch provided in this embodiment, the stepping three-position switch is composed of an operating mechanism 1, a dynamic seal 2, a propulsion device 3, a static contact 4, a moving contact 5, The base consists of 6 components.

The operating mechanism 1 is a gear transmission structure, including a main gear and a driven gear. The transmission ratio of the main gear and the driven gear is 1:1, and the main gear is linked with the three-phase driven gear for uniform speed transmission.

The propulsion device 3 is driven by an insulating screw rod, and one end of the insulating screw rod is built into the moving contact 5 to drive the moving contact 5 to move in a straight line in the front and rear directions to avoid conducting with the main circuit.

The dynamic seal 2 is assembled on the mechanism operation plate, and the connection between the operating mechanism 1 and the propulsion device 3 is realized through the dynamic seal 2 . The operating mechanism 1 and the dynamic seal 2, and the dynamic seal 2 and the propulsion device 3 are linked by a square hole shaft.

The static contact 4 is an annular contact with built-in contact fingers. There are three static contacts 4, which are arranged in a line according to the front, middle and rear positions, and are fixed on the base 6 by bolts; the front and rear position contacts are "one" type, and the middle position contact is "T" type, each Keep a fixed distance between the contacts. It has three functions of "closing", "isolation" and "grounding" respectively.

The moving contact 5 is an annular contact, and the moving contact 5 has the propulsion device 3 built in its annular contact, and the propulsion device 3 moves linearly in the front and rear directions in the static contact 4 to realize the switch on or grounding.

The stepping three-position switch provided in this embodiment is stepping, the operating mechanism 1 is a 1:1 gear transmission, and the dynamic seal 2 realizes the connection between the operating mechanism 1 and the propulsion device 3, and the operating mechanism 1 generates The operating work is converted into the kinetic energy of the propulsion device 3, and the propulsion device 3 is built in the movable contact 5 to realize linear motion in the forward and backward direction. The main gear is linked with the three-phase driven gear to drive at a constant speed. Through the forward and reverse rotation of the main gear, the driven gear and then drives the moving contact 5 to step forward or backward, and the switch is turned on or grounded. It is operated manually or electrically to realize the stepping action of the switch.

Claims (10)

1. a stepping three-station, it is characterized in that: include operating mechanism (1), operating mechanism (1) connects propulsion plant (3) by movable sealing (2), propulsion plant (3) connects moving contact (5), and propulsion plant (3), static contact (4), moving contact (5) are coaxially disposed；

Static contact (4) has three, according to before, during and after position word order.

2. a kind of stepping three-station as claimed in claim 1, it is characterised in that: described operating mechanism (1) is gear transmission structure, is made up of intermeshing master gear and driven gear.

3. a kind of stepping three-station as claimed in claim 2, it is characterised in that: described master gear and driven gear gear ratio are 1: 1.

4. a kind of stepping three-station as claimed in claim 1, it is characterised in that: described propulsion plant (3) is insulation screw mandrel.

5. a kind of stepping three-station as claimed in claim 1, it is characterised in that: described operating mechanism (1) adopts four square hole shaft linkages with movable sealing (2), movable sealing (2) with propulsion plant (3).

6. a kind of stepping three-station as claimed in claim 1, it is characterised in that: described static contact (4) is fixed on pedestal (6).

7. a kind of stepping three-station as claimed in claim 1, it is characterised in that: in described static contact (4), forward and backward position contact is " one " type, and middle position contact is T-shape, keeps fixed range between each static contact.

8. a kind of stepping three-station as claimed in claim 1, it is characterised in that: described static contact (4) is for being with built-in fingertip ring contact, and described moving contact (5) is ring contact.

9. a kind of stepping three-station as claimed in claim 1, it is characterized in that: the operating work that operating mechanism (1) produces is converted into the kinetic energy of propulsion plant (3) by described movable sealing (2), drive moving contact (5) to realize fore-and-aft direction rectilinear motion, connect with corresponding static contact (4).

10. a kind of stepping three-station as claimed in claim 2 or claim 3, it is characterized in that: by described master gear rotating, linkage driven gear transmission, and then drive moving contact (5) stepping to advance or retreat, connect with corresponding static contact (4), it is achieved " combined floodgate ", " isolation " or " ground connection " function.