CN215527513U

CN215527513U - Static contact of dual-power transfer switch

Info

Publication number: CN215527513U
Application number: CN202122242967.9U
Authority: CN
Inventors: 管瑞良; 徐晓阳; 顾怡文
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-01-14
Anticipated expiration: 2031-09-16

Abstract

A static contact of a dual-power transfer switch belongs to the technical field of low-voltage appliances. Comprises a first connecting plate, a second connecting plate and an arc striking sheet, and is characterized in that: the first connecting plate is provided with a mounting seat; the arc striking piece comprises an arc striking plate and a pair of mounting feet, the mounting feet are formed by bending the end parts of the arc striking plate and extending towards the mounting base and are fixed with the mounting base, and openings are formed between the mounting feet at intervals; the second connecting plate is perpendicular to the mounting seat, one end of the second connecting plate is fixedly connected with the mounting seat, the other end of the second connecting plate extends to form a contact, the contact is located on one side of the pair of mounting feet and corresponds to the arc striking plate, and the portion, extending to the other side of the pair of mounting feet after the second connecting plate penetrates through the opening, is located between the arc striking plate and the mounting seat. The advantages are that: the conductive sectional area of the connecting plate for fixing the stationary contact is ensured to the maximum extent, so that the temperature rise is reduced, the structure is compact, and the arc striking effect is ensured.

Description

Static contact of dual-power transfer switch

Technical Field

The utility model belongs to the technical field of low-voltage electrical appliances, and particularly relates to a static contact of a dual-power transfer switch.

Background

In the technical field of electric appliances, an automatic transfer switching equipment (ATSE for short) is used for providing an uninterruptible power supply for a load, and can be switched among different power supplies to ensure the continuity of power supply. Modularization and miniaturization become development directions in the technical field of electric appliances, and the automatic transfer switching device is used as an important device of a low-voltage electric appliance, and higher design requirements are also provided in the aspects of modularization and miniaturization.

The clamping type static contact component of the existing automatic change-over switch generally has an integrated structure and a split structure, and the integrated structure is formed by locally bending the same connecting plate and is limited by space, so that the conductive section of the connecting plate at the bending part is suddenly reduced; the split structure also limits the conductive cross section of the split linking plate because the arc angle is closer to the split linking plate. The locally smaller conductive cross-section of the connection plate leads to a higher temperature, which is detrimental to the temperature rise of the entire conductive loop.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the static contact structure of the dual power transfer switch. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a static contact of a dual-power transfer switch, which can ensure the conductive sectional area of a connecting plate for fixing the static contact to the greatest extent, thereby reducing the temperature rise, having compact structure and ensuring the arc striking effect.

The task of the utility model is accomplished by the following steps that the static contact of the dual-power transfer switch comprises a first connecting plate, a second connecting plate and an arc striking sheet, wherein the first connecting plate is provided with a mounting seat; the arc striking piece comprises an arc striking plate and a pair of mounting feet, the mounting feet are formed by bending the end parts of the arc striking plate and extending towards the mounting base and are fixed with the mounting base, and openings are formed between the mounting feet at intervals; the second connecting plate is perpendicular to the mounting seat, one end of the second connecting plate is fixedly connected with the mounting seat, the other end of the second connecting plate extends to form a contact, the contact is located on one side of the pair of mounting feet and corresponds to the arc striking plate, and the portion, extending to the other side of the pair of mounting feet after the second connecting plate penetrates through the opening, is located between the arc striking plate and the mounting seat.

In a specific embodiment of the present invention, a positioning boss is convexly disposed at an end portion of the second coupling plate facing the mounting seat, the mounting seat is formed with a positioning hole, and the positioning boss and the positioning hole are mutually fitted.

In another specific embodiment of the present invention, an end of the second linking plate facing an end of the mounting seat is welded to the mounting seat.

In another specific embodiment of the present invention, the contact points are fixed to both side surfaces of the contact of the second link plate.

In a further specific embodiment of the utility model, the contacts are provided with recesses so that after soldering of the contacts, the outermost contours of the contacts are flush with the front and rear faces of the second joint plate.

In a further specific embodiment of the present invention, the contact surface is provided with a guiding inclined plane and a contact plane along a moving direction of a moving contact and a stationary contact of the dual power transfer switch, a distance between a pair of contacts in a guiding inclined plane region is from narrow to wide along the moving direction of the moving contact and the stationary contact, and a distance between the pair of contacts in a contact plane region is equal.

In a further specific embodiment of the present invention, a gap is provided between a plane on which the pair of mounting legs is located and the end of the contact.

In a more specific embodiment of the present invention, the end portions of the pair of mounting legs extending to the mounting seat are bent to form mounting ends, and the mounting ends are fixed to the mounting seat.

In yet another specific embodiment of the present invention, the mounting holes on the mounting ends of the pair of mounting legs and the circular holes on the mounting seat are riveted by rivets.

In a further embodiment of the present invention, a pair of holes or slots are formed at positions corresponding to a pair of mounting legs of the mounting base, and the mounting legs are riveted after being matched with the holes or slots.

Due to the adoption of the structure, the utility model has the beneficial effects that: in the static contact of the dual-power transfer switch, the second connecting plate is arranged perpendicular to the mounting seat of the first connecting plate, one end of the second connecting plate is fixedly connected with the mounting seat, the other end of the second connecting plate is provided with a contact in an extending manner, the contact is positioned on one side of a pair of mounting pins of the arc striking piece and corresponds to the arc striking plate of the arc striking piece, the part of the second connecting plate, which passes through an opening between the pair of mounting pins and extends to the other side of the pair of mounting pins, is positioned between the arc striking plate and the mounting seat, the size of the second connecting plate cannot be limited by the arrangement of the opening, the conductive sectional area of a conductive plate for fixing a contact, namely the conductive sectional area of the second connecting plate, the first connecting plate and the electric connection between the second connecting plate and the first connecting plate is ensured to the greatest extent while the corresponding matching of the contact and the arc striking plate is ensured, and the temperature rise is reduced; secondly, the arc striking plate, the contact and the connecting plate are reasonably arranged by utilizing the limited space, so that the structure is compact; and thirdly, a gap is kept between the arc striking plate and the end part of the contact while the arc striking plate corresponds to the position of the contact, so that on one hand, the arc is favorable for moving from the contact to the arc striking plate to enter an arc extinguishing chamber, the arc striking effect is ensured, and on the other hand, metal particles generated by burning the contact by the arc are deposited in the gap.

Drawings

Fig. 1 is an exploded view of a stationary contact of a dual power transfer switch according to the present invention.

Fig. 2 is a schematic diagram of a contact arc extinguishing module of the dual power transfer switch of the utility model.

Fig. 3a is a schematic diagram of the interior of the contact quenching module when the second power is in the second power-on position according to the present invention.

Fig. 3b is a schematic diagram of the interior of the contact quenching module when the first power source and the second power source are both off according to the present invention.

Fig. 3c is a schematic diagram of the interior of the contact quenching module when the first power is turned on according to the present invention.

In the figure: 1. the device comprises a first connecting plate, 11, a mounting seat, 12, a positioning hole and 13 circular holes; 2. a second connecting plate, 21, a contact, 22, a positioning boss, 23, a contact, 231, a guide inclined plane, 232, a contact plane and 24, an end; 3. the arc striking plate 31, the arc striking plate 32, the mounting foot 33, the opening 34, the mounting end 341 and the mounting hole; 4. a wiring terminal; 5. riveting; 10. a gap; 100. a base; 200. the moving contact, 201, a first contact end, 202, a second contact end and 203 are in flexible connection; 300. a first power supply fixed contact 301, a first power supply wiring terminal; 400. a second power source static contact 401, a second power source wiring terminal; 500. an arc extinguishing chamber; 600. load terminals.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments by the applicant is not intended to limit the technical solutions, and any changes made in the form of the present invention rather than the essential changes should be regarded as the protection scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the positions shown in the corresponding drawings, and thus, should not be construed as particularly limiting the technical solution provided by the present invention.

Referring to fig. 2 to 3c, the utility model relates to a fixed contact of a dual power transfer switch, the dual power transfer switch includes a contact arc extinguishing module, the contact arc extinguishing module includes a base 100, a movable contact 200, a first power fixed contact 300, a second power fixed contact 400, an arc extinguishing chamber 500, and a load connection terminal 600, the first power fixed contact 300 and the second power fixed contact 400 are both fixed on the base 100, the movable contact 200 is rotatably pivoted on the base 100, the first power fixed contact 300 forms a first power connection terminal 301 at an end portion extending out of the base 100, the second power fixed contact 400 forms a second power connection terminal 401 at an end portion extending out of the base 100, the load connection terminal 600 is fixed on the base 100, and the movable contact 200 is connected with the load connection terminal 600 through a flexible connection 203.

As shown in fig. 3a to 3c, the first power static contact 300 and the second power static contact 400 have substantially the same structure, except that the first connecting plate of the second power static contact 400 is longer than the first connecting plate of the first power static contact 300.

The first power static contact 300 and the second power static contact 400 are collectively referred to as static contacts, as shown in fig. 1, the static contacts include a first connection plate 1, a second connection plate 2, and an arc striking plate 3, the first connection plate 1 has a mounting seat 11; the arc striking sheet 3 comprises an arc striking plate 31 and a pair of mounting feet 32, the pair of mounting feet 32 are formed by bending the end part of the arc striking plate 31 and extending towards the mounting seat 11, and are fixed with the mounting seat 11, and an opening 33 is formed between the pair of mounting feet 32 at an interval; the second connecting plate 2 is arranged perpendicular to the mounting seat 11, one end of the second connecting plate is fixedly connected with the mounting seat 11, the other end of the second connecting plate extends to form a contact 21, the contact 21 is located on one side of the pair of mounting feet 32 and corresponds to the arc striking plate 31, and the part of the second connecting plate 2, which passes through the opening 33 and then extends to the other side of the pair of mounting feet 32, is located between the arc striking plate 31 and the mounting seat 11. The arc striking plate 31 corresponds to the contact 21, so that the arc root on the static contact can move to the arc striking plate 31 quickly, and the arc is prevented from burning on the contact 23.

As shown in fig. 1, a positioning boss 22 is convexly disposed at an end portion of the second coupling plate 2 facing the mounting seat 11, a positioning hole 12 is disposed on the mounting seat 11, and the positioning boss 22 and the positioning hole 12 are mutually fitted. The positioning boss 22 may be square as shown in this embodiment, and the positioning hole 12 is also a square hole, and the positioning boss 22 is inserted into the square hole to realize the relative positioning of the second connection plate 2 and the mounting seat 11. An end 24 of the second gusset 2 facing the end of the mounting seat 11 is welded to the mounting seat 11.

As shown in fig. 1 and 3a, a gap 10 is provided between the plane of the pair of mounting feet 32 and the end of the contact 21, and after an electric arc is generated between the moving contact and the stationary contact, metal particles generated by burning the contact by the electric arc are deposited in the gap 10. The ends of the pair of mounting legs 32 extending to the mounting base 11 are bent to form mounting ends 34, and the mounting ends 34 are fixed to the mounting base 11. The mounting holes 341 on the mounting ends 34 of the pair of mounting legs 32 and the round holes 13 on the mounting seat 11 are riveted by the rivets 5.

As shown in fig. 1, contacts 23 are fixed to the front side and the rear side of the contact 21, respectively, and the contacts 23 are silver alloy contacts. Two of said silver alloy contacts 23 are welded on the two sides of the contact 21, respectively, the contact 21 may be provided with a recess (as seen in fig. 1, the surface of the contact 21 is recessed compared to the surface of the second connection plate 2 to form a recess), and the contact 23 is fixed in the recess so that the outermost contour of the contact 23 is flush with the front and back of the second connection plate 2 after the contact 23 is welded. Preferably, the surface of the contact 23 is provided with a guiding inclined plane 231 and a contact plane 232 along the moving direction of the contact closing of the moving contact and the fixed contact of the dual power transfer switch, on the area of the guiding inclined plane 231, the distance between the pair of contacts 23 is from narrow to wide along the moving direction of the contact closing of the moving contact and the fixed contact, and on the area of the contact plane 232, the distance between the pair of contacts 23 is equidistant. In the process of the closing motion of the moving contact and the fixed contact of the dual power transfer switch, the guiding inclined plane 231 is used for guiding the contact of the moving contact and the fixed contact, and when the moving contact and the fixed contact are in place, the moving contact stays on the contact plane 232 to realize the reliable contact with the contact 21.

As shown in fig. 1, the stationary contact further comprises a sampling terminal 4 riveted to the first connection plate 1.

In this embodiment, the fixing manner of the arc striking plate 3 and the mounting seat 11 is as follows: the rivet 5 is bent through the end portions of the pair of mounting legs 32 extending to the mounting seat 11 to form a mounting end 34, and the mounting end 34 is fixed to the mounting seat 11. The fixing of the arc striking piece 3 and the mounting seat 11 is not limited to the above embodiment, and may be: the ends of the pair of mounting legs 32 extending to the mounting base 11 are not provided with the mounting ends 34 formed by bending, but a pair of holes or grooves are formed at positions of the mounting base 11 corresponding to the two mounting legs 32, and the mounting legs 32 are riveted after being engaged with the holes or grooves.

As shown in fig. 3a to 3c, the action process of the dual power transfer switch switching from the second power switch-on position to the first power switch-on position is as follows:

as shown in fig. 3a, the dual power transfer switch is located at a second power switching-on position, the silver alloy contact of the second contact end 202 of the clamping-type moving guide rod assembly of the moving contact 200 contacts with the contact 23 of the second power static contact 400, the second power loop is on, and the first power loop is off;

as shown in fig. 3b, under the driving of the operating mechanism, the movable contact 200 rotates clockwise to the middle disconnection position, and at this time, the movable contact 200 is disconnected from both the first power source static contact 300 and the second power source static contact 400;

as shown in fig. 3c, under the driving of the operating mechanism, the movable contact 200 continues to rotate clockwise to the first power supply switching-on position, the silver alloy contact of the first contact end 201 of the movable contact 200 contacts with the contact 23 of the first power supply static contact 300, the first power supply loop is turned on, and the second power supply loop is turned off.

The action process of the dual power supply changeover switch for switching from the first power supply switching-on position to the second power supply switching-on position is opposite to the process, and the description is not repeated.

Claims

1. The utility model provides a static contact of dual supply change over switch, includes first hitch plate (1), second hitch plate (2), striking piece (3), its characterized in that: the first connecting plate (1) is provided with a mounting seat (11); the arc striking piece (3) comprises an arc striking plate (31) and a pair of mounting feet (32), the pair of mounting feet (32) is formed by bending the end part of the arc striking plate (31) and extending towards the mounting seat (11), the arc striking piece is fixed with the mounting seat (11), and openings (33) are formed between the pair of mounting feet (32) at intervals; the second connecting plate (2) is perpendicular to the mounting seat (11), one end of the second connecting plate is fixedly connected with the mounting seat (11), the other end of the second connecting plate is provided with a contact (21) in an extending mode, the contact (21) is located on one side of the pair of mounting feet (32) and corresponds to the arc striking plate (31), and the portion, extending to the other side of the pair of mounting feet (32) after the second connecting plate (2) penetrates through the opening (33), is located between the arc striking plate (31) and the mounting seat (11).

2. The stationary contact of the dual power transfer switch of claim 1, wherein: the end part, facing the mounting seat (11), of the end part of the second connecting plate (2) is convexly provided with a positioning boss (22), the mounting seat (11) is provided with a positioning hole (12), and the positioning boss (22) and the positioning hole (12) are mutually embedded and matched.

3. The stationary contact of the dual power transfer switch of claim 1, wherein: the end (24) of one end of the second connecting plate (2) facing the mounting seat (11) is welded with the mounting seat (11).

4. The stationary contact of the dual power transfer switch of claim 1, wherein: and two sides of the contact (21) of the second connecting plate (2) are respectively fixed with a contact (23).

5. The stationary contact of the dual power transfer switch of claim 4, wherein: grooves are arranged on the contact (21) so that after the contact (23) is welded, the outermost contour of the contact (23) is flush with the front surface and the rear surface of the second connecting plate (2).

6. The stationary contact of the dual power transfer switch of claim 4, wherein: a guide inclined plane (231) and a contact plane (232) are arranged on the surface of the contact (23) along the moving direction of the contact closing of the moving contact and the fixed contact of the dual-power transfer switch, on the area of the guide inclined plane (231), the distance between the pair of contacts (23) is from narrow to wide along the moving direction of the contact closing of the moving contact and the fixed contact, and on the area of the contact plane (232), the pair of contacts (23) are equidistant.

7. The stationary contact of the dual power transfer switch of claim 1, wherein: a gap (10) is arranged between the plane of the pair of mounting feet (32) and the end part of the contact (21).

8. The stationary contact of the dual power transfer switch of claim 1, wherein: the end parts of the pair of mounting feet (32) extending to the mounting seat (11) are bent to form mounting ends (34), and the mounting ends (34) are fixed with the mounting seat (11).

9. The stationary contact of the dual power transfer switch of claim 8, wherein: the riveting between the mounting holes (341) on the mounting ends (34) of the pair of mounting feet (32) and the round holes (13) on the mounting seat (11) is realized through rivets (5).

10. The stationary contact of the dual power transfer switch of claim 1, wherein: a pair of holes or grooves are formed in the positions, corresponding to the pair of mounting feet (32), of the mounting base (11), and the mounting feet (32) are riveted after being matched with the holes or grooves.