CN215988568U

CN215988568U - Isolating switch

Info

Publication number: CN215988568U
Application number: CN202122384101.1U
Authority: CN
Inventors: 王阅
Original assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Current assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-03-08
Anticipated expiration: 2031-09-28

Abstract

The utility model discloses an isolating switch, which comprises a switch base, a movable contact component and a fixed contact, wherein the movable contact component and the fixed contact are arranged on the switch base, the movable contact component is provided with a movable contact rotating frame and a movable contact piece, the end part of the movable contact piece forms a movable contact, the movable contact rotating frame is arranged on the switch base, the movable contact piece is arranged on the movable contact rotating frame so as to form contact conduction and separation disconnection between the movable contact and the fixed contact through the rotation of the movable contact rotating frame, and at least two magnets are arranged in the area below the fixed contact in the switch base, on the movable contact rotating frame and outside a moving track in which the movable contact in the switch base is separated from the fixed contact to be completely disconnected. The utility model arranges the magnets at a plurality of positions, and can form stronger arc striking action in the switching-off process to improve the arc extinguishing effect.

Description

Isolating switch

Technical Field

The utility model relates to the technical field of electrical equipment, in particular to an isolating switch.

Background

The photovoltaic inverter is generally required to be provided with a rotary isolating switch, which is provided with a contact pole and a mechanism pole, wherein the contact pole is composed of a plurality of coaxial moving contacts and fixed contacts, the moving contacts and the fixed contacts are correspondingly connected to a wiring terminal, and the mechanism pole is clutched with the fixed contacts by driving the contacts to rotate, so that the switching-on and switching-off of a circuit system are realized. At present, the requirements on aspects of arc extinguishing capability, arc extinguishing speed, contact pole durability and the like of an isolating switch product in the market are higher and higher, arc extinguishing grids and magnets are mainly added for arc extinguishing in the prior art, particularly, the magnets are arranged below static contacts or on movable contact turntables in a switch cavity formed by a laminated structure, but the arrangement of the magnets is not reasonable enough, the distribution of the magnetic field intensity is not ideal, the voltage between the contacts cannot be effectively reduced, and the arc extinguishing performance is greatly reduced, so that the requirements are needed to be improved.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide a disconnecting switch structure capable of effectively improving arc extinguishing capacity.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model provides an isolating switch, which comprises a switch base, a movable contact component and a fixed contact, wherein the movable contact component and the fixed contact are arranged on the switch base, the movable contact component is provided with a movable contact rotating frame and a movable contact piece, a movable contact is formed at the end part of the movable contact piece, the movable contact rotating frame is arranged on the switch base, the movable contact piece is arranged on the movable contact rotating frame so as to form contact conduction and separation disconnection between the movable contact and the fixed contact through the rotation of the movable contact rotating frame, and the isolating switch comprises a switch base body, a movable contact assembly and a fixed contact, wherein the movable contact assembly is arranged on the switch base body, the movable contact assembly is provided with a movable contact rotating frame and a movable contact piece, and the movable contact rotating frame is provided with a movable contact rotating frame and a movable contact rotating frame, the movable contact rotating frame is provided with a movable contact, the movable contact rotating frame is arranged on the movable contact rotating frame, the movable contact rotating frame is provided with the movable contact rotating frame, the movable contact rotating frame is provided with the movable contact, the movable contact assembly is provided with the movable contact, the movable contact assembly, the movable contact assembly is provided with the movable contact, the:

a first magnet is arranged in the area right below the static contact in the switch seat body, a second magnet is arranged in the area of the upper edge of the moving contact rotating frame, and a third magnet is arranged in the area outside a moving track between the complete disconnection positions of the moving contact and the static contact in the switch seat body;

or a first magnet is arranged in the area right below the static contact in the switch seat body, a second magnet is arranged in the edge area on the moving contact rotating frame, and the included angle between the center of the second magnet and the connecting line of the axis of the moving contact rotating frame and the connecting line of the center of the moving contact and the axis of the moving contact rotating frame is less than 40 degrees;

or a first magnet is arranged in a region right below a fixed contact in the switch seat body, and a third magnet is arranged in a region outside a moving track between a moving contact and the fixed contact in the switch seat body from a starting separation position to a complete disconnection position, wherein the third magnet and the first magnet are uniformly distributed on the switch seat body;

or the upper edge area of the moving contact rotating frame is provided with a second magnet, and the area outside the moving track between the moving contact and the static contact in the switch seat body from the starting separation position to the complete disconnection position is provided with a third magnet, wherein the third magnet is positioned near the area where the head of the moving contact is positioned when the moving contact and the static contact are completely disconnected.

Compared with the prior art, the utility model arranges the magnets at least two positions in the moving track area between the lower part of the fixed contact in the isolating switch seat body, the upper part of the moving contact rotating frame and the moving contact and the fixed contact in the switch seat body from the starting separation to the complete disconnection position, thereby forming a dynamic magnetic field which changes from the moment of opening the switch to the end of opening the switch along with the fixed contact, and forming stronger arc striking action in the opening process all the time. Therefore, when the moving contact is quickly disconnected, the electric arc is quickly pulled away and the electric field intensity between the contacts is reduced, so that the electric arc voltage is not enough to maintain the combustion of the electric arc, the electric arc is extinguished, and finally, the arc extinguishing performance of a product is effectively improved.

Drawings

FIG. 1 is a schematic diagram of the closing position of the disconnecting switch according to the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic diagram of the opening position of the isolating switch according to the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is an exploded view of a single layer switch cell in the isolator switch of the present invention;

FIG. 6 is a top plan view of the moving contact assembly of the isolating switch of the present invention;

FIG. 7 is a bottom view of the moving contact assembly of the disconnect switch of the present invention;

FIG. 8 is an exploded view of the moving contact assembly of the disconnector of the present invention;

fig. 9 is a front view of an arc chute of the isolator switch of the present invention;

fig. 10 is a rear view of an arc chute in the isolator switch of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but it should not be construed that the scope of the present invention is limited to the embodiments described below.

Referring to fig. 1-10, the isolating switch 100 of the present invention is formed by one or more layers of rotary switch units 101 that are stacked in a clamping manner, wherein each switch unit 101 includes a switch base 1, a moving contact assembly 2, a fixed contact 3, an arc extinguishing grid 4 and a plurality of magnets (preferably permanent magnets such as magnetic steel), wherein the moving contact assembly 2, the fixed contact 3 and the arc extinguishing grid 4 are installed on the switch base 1, the moving contact assembly 2 is composed of a moving contact rotating frame 21 and a moving contact 22, a moving contact 221 is formed at an end portion of the moving contact 22, the moving contact rotating frame 21 is installed on the switch base 1, and the moving contact 22 is installed on the moving contact rotating frame 21, such that contact conduction and separation disconnection between a contact of the moving contact 221 and a contact of the fixed contact 3 can be formed by rotation of the moving contact rotating frame 21. Further, a plurality of magnets are installed at corresponding positions of the switch base 1 or the movable contact rotating frame 21 to improve the arc extinguishing effect of the isolating switch 100.

As shown in fig. 1 to 8, the arrangement of the magnets in the present invention is: magnets are arranged at least at two positions in the switch base body 1 below the static contact 3, on the movable contact rotating frame 21 and in the switch base body 1 outside the area of the moving track from the beginning separation of the static contact 3 to the complete disconnection of the movable contact 221. The preferred mode is that a first magnet 6 is arranged in the area right below the static contact 3 in the switch base 1, a second magnet 7 is arranged in the edge area of the movable contact rotating frame 21, and a third magnet 5 is arranged at the position where the movable contact 221 and the static contact are completely disconnected in the switch base 1. Thus, on the basis of the arrangement of the arc-extinguishing grid 4, the switch base body 1 of the unit switch 101 is also provided with the first magnet 6 which is static relative to the static contact 3, the second magnet 7 which is static relative to the moving contact 221 and the third magnet 5 which is static relative to the static contact 3, the first magnet 6, the third magnet 5 and the second magnet 7 are mutually matched to form a dynamic magnetic field which changes from the moment of opening the static contact 3 to the end of opening the static contact, a strong arc striking effect is always formed in the opening process, and when the moving contact 221 is quickly disconnected, the electric arc is quickly pulled open and the electric field intensity between the contacts is reduced, so that the electric arc voltage is not enough to maintain the combustion of the electric arc, and the electric arc is extinguished.

In the present invention, the first magnet 6, the second magnet 7 and the third magnet 5 can be selected from one of the following combinations: (1) a first magnet 6, a second magnet 7, a third magnet 5; (2) a first magnet 6, a second magnet 7; (3) a first magnet 6, a third magnet 5; (4) a second magnet 7, a third magnet 5. Obviously, when the first magnet 6, the second magnet 7 and the third magnet 5 are selected at the same time, the arc extinguishing effect of the disconnector 100 is more prominent, and the following description focuses on the case (1).

In the present invention, the installation manner and spatial layout of the first magnet 6, the second magnet 7, and the third magnet 5 may be further optimized, as described below.

As shown in fig. 1 to 8, the first magnet 6 is located below the static contact 3 and is uniformly distributed with the third magnet 7, and preferably, an included angle between a connecting line of the center of the third magnet 7 and the axis of the movable contact rotating frame 21 and an included angle between a connecting line of the center of the first magnet 6 and the axis of the movable contact rotating frame 21 are 90 °; an included angle alpha between a connecting line of the center of the second magnet 7 and the axis of the movable contact rotating frame 21 and a connecting line of the center of the movable contact 3 and the axis of the movable contact rotating frame 21 is less than 60 degrees, namely the second magnet 7 is positioned in a sector range of +/-60 degrees on the left and right sides of the connecting line of the center of the movable contact 3 and the axis of the movable contact rotating frame 21, and is preferably alpha less than 40 degrees (not a boundary); by adopting the magnet layout, the arc extinguishing effect is better.

As shown in fig. 6-8, the movable contact rotating frame 21 is composed of an upper buckle 211 and a lower buckle 212, wherein the upper buckle 211 and the lower buckle 212 are tightly connected through a bayonet, the lower buckle 212 is provided with a slot 2122, and the movable contact 22 is provided with a slot 2122; the lower clip 212 is provided with a second magnet mounting groove 2121, and the second magnet 7 is disposed in the second magnet mounting groove 2121. In particular, the side surface of the upper buckle 211 is provided with dentate convex parts 2111 in the motion region from closing to opening, and the dentate convex parts 2111 can elongate the arc when the moving contact and the static contact are opened rapidly, so as to facilitate the rapid breaking of the arc.

As shown in fig. 1-5, the present invention retains the arc extinguishing device of the prior art, and specifically, provides an arc chute 4, which is installed in the switch housing 1 to form an arc extinguishing chamber. Meanwhile, as shown in fig. 9-10, the structure of the arc chute 4 is optimized by the utility model, and the arc chute comprises a bracket 41 and a chute 41 (5 pieces are shown in the figures), the bracket 41 is provided with a notch 411 for clamping the chute 42, and the back of the notch 411 is provided with a convex connecting support part 412, so that the back reignition can be eliminated.

The above embodiments of the present invention can effectively improve the arc extinguishing effect, specifically including but not limited to the following aspects:

(1) magnets are arranged below the static contact 3, on the moving contact rotating frame 21 and at the disconnection position, so that the arc area of the contact track line is completely covered, the magnetic field intensity of the arc-drawing area is enhanced, and the electric arc in the area can be blown away more effectively.

(2) In the single-layer switch base 1, the magnets are all surrounded by the upper and lower switch bases 1, the static contact 3 and the clamping groove 2122 arranged on the lower buckle 212, so as to prevent the magnets from being burnt by electric arc to cause demagnetization, thereby influencing the service life and breaking current.

(3) The upper buckle 211 of the movable contact assembly 2 is provided with a middle dentate convex part 2111 which is beneficial to lengthening the electric arc and breaking the electric arc;

(4) the connection support 412 is designed on the back of the bracket 41 of the arc chute 4, which helps to eliminate the back reignition.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that the scope of the present invention is not limited to the embodiments described above, and that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. An isolating switch comprises a switch base, a moving contact component and a fixed contact, wherein the moving contact component and the fixed contact are arranged on the switch base, the moving contact component is provided with a moving contact rotating frame and a moving contact piece, a moving contact is formed at the end part of the moving contact piece, the moving contact rotating frame is arranged on the switch base, the moving contact piece is arranged on the moving contact rotating frame, so that the moving contact and the fixed contact are in contact conduction and separation disconnection through the rotation of the moving contact rotating frame.

2. An isolating switch comprises a switch base, a moving contact component and a fixed contact, wherein the moving contact component and the fixed contact are arranged on the switch base, the moving contact component is provided with a moving contact rotating frame and a moving contact piece, a moving contact is formed at the end part of the moving contact piece, the moving contact rotating frame is arranged on the switch base, the moving contact piece is arranged on the moving contact rotating frame, so that the moving contact and the fixed contact are in contact conduction and separation disconnection through the rotation of the moving contact rotating frame, and the isolating switch is characterized in that a first magnet is arranged in a region right below the fixed contact in the switch base, a second magnet is arranged in a marginal region on the moving contact rotating frame, and an included angle formed by a connecting line of the center of the second magnet and the axis of the moving contact rotating frame and a connecting line of the center of the moving contact and the axis of the moving contact rotating frame is smaller than 40 degrees.

3. An isolating switch comprises a switch base, a moving contact component and a fixed contact, wherein the moving contact component and the fixed contact are arranged on the switch base, the moving contact component is provided with a moving contact rotating frame and a moving contact piece, a moving contact is formed at the end part of the moving contact piece, the moving contact rotating frame is arranged on the switch base, and the moving contact piece is arranged on the moving contact rotating frame so as to form contact conduction and separation disconnection between the moving contact and the fixed contact through the rotation of the moving contact rotating frame.

4. An isolating switch comprises a switch base, a moving contact component and a fixed contact, wherein the moving contact component and the fixed contact are arranged on the switch base, the moving contact component is provided with a moving contact rotating frame and a moving contact piece, a moving contact is formed at the end part of the moving contact piece, the moving contact rotating frame is arranged on the switch base, and the moving contact piece is arranged on the moving contact rotating frame so as to form contact conduction and separation disconnection between the moving contact and the fixed contact through the rotation of the moving contact rotating frame.

5. The isolating switch of claim 1 or 4, wherein the angle between the connecting line of the center of the second magnet and the axis of the movable contact rotating frame and the connecting line of the center of the movable contact and the axis of the movable contact rotating frame is less than 60 °.

6. The isolating switch of claim 1 or 3, wherein the angle between the line connecting the center of the third magnet and the axis of the movable contact rotating frame and the line connecting the center of the first magnet and the axis of the movable contact rotating frame is 90 °.

7. The isolating switch of claim 1, 2 or 4, wherein the movable contact rotating frame is provided with a second magnet mounting groove, and the second magnet is disposed in the second magnet mounting groove.

8. The disconnector according to claim 1, 2, 3 or 4, characterized in that the tripping flank is provided with a tooth-like projection in the area of movement from closing to opening.

9. The isolating switch as claimed in claim 1, 2, 3 or 4, wherein the moving contact rotating frame comprises an upper buckle and a lower buckle, the upper buckle and the lower buckle are tightly connected through a bayonet, the lower buckle is provided with a clamping groove, and the moving contact is arranged in the clamping groove.

10. A disconnector according to claim 1, 2, 3 or 4, characterized in that the switch housing is provided with an arc chute, wherein the arc chute comprises a bracket and a grid, the bracket is provided with a notch for clamping the grid, and the back of the notch is provided with a connection support.