A fast arc-starting frame circuit breaker static contact

Abstract

The utility model discloses a frame circuit breaker static contact with fast arc striking, which comprises a static connection plate, a support plate and an arc striking plate, the upper side of the static connection plate is fixedly provided with an arc striking plate, the lower side of the static connection plate is fixedly provided with a support plate, the end of the static connection plate is provided with a static arc contact and a static contact, the static arc contact and the static contact are arranged at intervals in the up and down directions, the static arc contact is elastically arranged at the end of the static connection plate, the static arc contact can be elastically moved outside or inside the end of the static connection plate, and the static contact is fixedly arranged at the end of the static connection plate. The purpose is to provide a frame circuit breaker static contact with fast arc striking and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of frame circuit breakers, in particular to a static contact for a frame circuit breaker. Background Art

[0002] A frame-type circuit breaker is a mechanical switch that can connect, carry and disconnect current under normal circuit conditions, and can also connect, carry for a certain time and disconnect current under specified abnormal circuit conditions. The frame-type circuit breaker includes a chassis, a mask, a conductive system, a contact system, and an operating mechanism for connecting the conductive system and the contact system.

[0003] The Chinese utility model patent with application number 202321499905.9, authorization announcement date November 17, 2023, and name "A static contact structure of a frame circuit breaker" includes a static connecting plate, a support plate and an arc striking plate. Static arc contacts and static contacts are provided at the end of the static connecting plate, and the static arc contacts and the static connecting plate are rigidly connected. In this way, when repeatedly closing and opening the switch, the moving contact knife frequently contacts the static arc contact. Since the static arc contact is rigidly connected to the static connecting plate, the moving contact knife and the static arc contact cannot be fully buffered during the contact process, which can easily cause damage to the components, thereby shortening the service life of the static contact. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a frame circuit breaker static contact with long service life and fast arc striking.

[0005] The utility model discloses a static contact of a frame circuit breaker with fast arc striking, comprising a static connecting plate, a supporting plate and an arc striking plate, wherein the upper side surface of the static connecting plate is fixedly provided with the arc striking plate, the lower side surface of the static connecting plate is fixedly provided with the supporting plate, the end of the static connecting plate is provided with a static arc contact and a static contact, the static arc contact and the static contact are arranged at intervals in the up and down directions, the static arc contact is elastically provided at the end of the static connecting plate, the static arc contact can be elastically moved outside or inside the end of the static connecting plate, and the static contact is fixedly provided at the end of the static connecting plate.

[0006] The utility model discloses a static contact of a frame circuit breaker with fast arc striking, wherein a slide groove is provided at the end of the static connecting plate, the slide groove extends in a direction from the outside to the inside of the end of the static connecting plate, a static arc contact with a block structure is slidably provided in the slide groove, a spring is provided between the static arc contact and a slide groove wall away from the end of the static connecting plate, and under the action of the spring, the static arc contact can slide elastically along the slide groove toward the outside or inside of the end of the static connecting plate.

[0007] The utility model discloses a static contact of a frame circuit breaker with fast arc striking, wherein an anti-dropout block is fixedly provided at the end of the sliding groove near the static connecting plate, and a stopper used in conjunction with the anti-dropout block is fixedly provided on the static arc contact. When the static arc contact slides along the sliding groove toward the end of the static connecting plate, the stopper can abut against the anti-dropout block.

[0008] The utility model discloses a static contact of a frame circuit breaker with fast arc striking, wherein two blind holes are provided on the wall of the slide groove away from the end of the static connecting plate, the two blind holes are arranged in the horizontal direction, two springs are provided, one end of the two springs are respectively inserted in the two blind holes, and the other ends of the two springs are abutted against the static arc contact.

[0009] The utility model discloses a static contact of a frame circuit breaker with fast arc striking, wherein the arc striking plate comprises a mounting plate, a first arc striking sub-plate and a second arc striking sub-plate, the mounting plate is arranged in a horizontal direction and fixedly arranged on the upper side of the static connecting plate, the first arc striking sub-plate and the second arc striking sub-plate are both arranged in a vertical direction, the lower ends of the first arc striking sub-plate and the second arc striking sub-plate are respectively fixedly connected to the two ends of the mounting plate, the mounting plate, the first arc striking sub-plate and the second arc striking sub-plate together form a U-shaped structure, the first arc striking sub-plate is arranged close to the end of the static connecting plate, and the second arc striking sub-plate is arranged away from the end of the static connecting plate.

[0010] The utility model discloses a static contact of a frame circuit breaker with fast arc striking, wherein the first arc striking plate comprises a first inclined portion, a first straight portion, a second inclined portion and a second straight portion connected in sequence from bottom to top, the first inclined portion is inclined from bottom to top toward the second arc striking plate, the first straight portion is arranged perpendicular to the mounting plate, the second inclined portion is arranged from bottom to top in a direction away from the second arc striking plate, the second straight portion is arranged perpendicular to the mounting plate, the second arc striking plate is a straight plate, the second arc striking plate is arranged perpendicular to the mounting plate, and the upper end surface of the second arc striking plate and the upper end surface of the first straight portion are located in the same horizontal plane.

[0011] The utility model discloses a static contact of a frame circuit breaker with fast arc striking, wherein the first inclined portion is provided with a first arc striking opening, the first straight portion is provided with a second arc striking opening, the first inclined portion and the first straight portion are also provided with an arc striking groove, one end of the arc striking groove is connected to the second arc striking opening, and the other end of the arc striking groove extends downward through the first arc striking opening to the lower end of the first inclined portion.

[0012] The utility model discloses a fast arc-striking frame circuit breaker static contact, wherein the first arc-striking sub-plate and the second arc-striking sub-plate are both provided with rounded corners between the mounting plate.

[0013] The difference between the static contact of the frame circuit breaker with fast arc striking of the utility model and the prior art is that the static arc contact of the static contact of the frame circuit breaker with fast arc striking of the utility model is elastically arranged at the end of the static connecting plate, so that when the frame circuit breaker is closed or opened, the moving contact knife can elastically contact the static arc contact, so that the two can be fully buffered during the contact process, thereby avoiding damage to components and extending the service life of the static contact.

[0014] The utility model will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the static contact of the frame circuit breaker with fast arc striking according to the utility model;

[0016] Figure 2 For along Figure 1 Sectional view along line AA;

[0017] Figure 3 The utility model is a three-dimensional static contact of a frame circuit breaker with rapid arc striking Figure 1 ;

[0018] Figure 4 The utility model is a three-dimensional static contact of a frame circuit breaker with rapid arc striking Figure 2 ;

[0019] Figure 5 This is an exploded view of the static contact of the frame circuit breaker with rapid arc striking according to the utility model. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, combined with Figure 2-5 As shown, the static contact of the frame circuit breaker with fast arc striking of the utility model comprises a static connecting plate 1, a support plate 12 and an arc striking plate, the upper side of the static connecting plate 1 is fixedly provided with an arc striking plate, the lower side of the static connecting plate 1 is fixedly provided with a support plate 12, the end of the static connecting plate 1 is provided with a static arc contact 9 and a static contact 10, the static arc contact 9 and the static contact 10 are arranged at intervals in the up and down directions, the static arc contact 9 is elastically arranged at the end of the static connecting plate 1, the static arc contact 9 can be elastically moved outside or inside the end of the static connecting plate 1, and the static contact 10 is fixedly provided at the end of the static connecting plate 1.

[0021] like Figure 2 , 5As shown, the utility model shows a static contact of a frame circuit breaker with fast arc striking, wherein a slide groove 17 is provided at the end of the static connecting plate 1, and the slide groove 17 extends in a direction from the outside to the inside of the end of the static connecting plate 1, and a static arc contact 9 with a block structure is slidably provided in the slide groove 17, and a spring 16 is provided between the static arc contact 9 and the slide groove wall of the slide groove 17 away from the end of the static connecting plate 1. Under the action of the spring 16, the static arc contact 9 can slide elastically along the slide groove 17 to the outside or inside of the end of the static connecting plate 1, that is, the static arc contact 9 can be elastically moved to the outside or inside of the end of the static connecting plate 1.

[0022] In the utility model, the static contact of the frame circuit breaker with fast arc striking, the anti-dropping block 15 is fixedly provided at the end of the slide groove 17 near the static connection plate 1, and the static arc contact 9 is fixedly provided with a stopper 14 used in conjunction with the anti-dropping block 15. When the static arc contact 9 slides along the slide groove 17 toward the end of the static connection plate 1, the stopper 14 can abut against the anti-dropping block 15. After the stopper 14 abuts against the anti-dropping block 15, the static arc contact 9 can be prevented from slipping from the slide groove 17.

[0023] The utility model provides a static contact of a frame circuit breaker with fast arc striking, wherein two blind holes 13 are provided on the slide groove wall of the slide groove 17 away from the end of the static connecting plate 1, and the two blind holes 13 are arranged in the horizontal direction. The spring 16 is provided in two, and one end of the two springs 16 is respectively inserted in the two blind holes 13, and the other ends of the two springs 16 are both in contact with the static arc contact 9.

[0024] When installing the spring 16 , a compressive preload is applied to the spring 16 , so that in the initial state, under the action of the spring 16 , the stopper 14 abuts against the anti-dropping block 15 , and the static arc contact 9 tends to move toward the outer side of the end of the static connecting plate 1 .

[0025] When closing the circuit breaker, the moving contact blade located below the static contact first contacts the static arc contact 9, so the static arc contact 9 slides along the slide groove 17 to the inside of the static connection plate 1 and compresses the spring 16 (the stopper 14 is separated from the anti-dropping block 15), generating an elastic buffer, and then the moving contact blade contacts the static contact 10 again. At this time, an arc is generated between the moving contact blade and the static contact 10, and the arc reaches the arc-starting plate through the static arc contact 9, and the arc-starting plate then leads the arc away to extinguish the arc. After the moving contact blade is completely in contact with the static contact 10, the moving contact blade separates from the static arc contact 9 again, so the spring 16 returns from the compressed state to the initial state. During this process, the static arc contact 9 slides along the slide groove 17 to the outside of the static connection plate 1 until the stopper 14 contacts the anti-dropping block 15 again.

[0026] When opening the switch, the moving contact blade first contacts the static arc contact 9, and then the static arc contact 9 slides along the slide groove 17 to the inner side of the static connection plate 1 and compresses the spring 16 (the stopper 14 separates from the anti-dropping block 15), generating an elastic buffer, and then the moving contact blade separates from the static contact 10. At this time, an arc is generated between the moving contact blade and the static contact 10, and the arc reaches the arc-starting plate through the static arc contact 9, and the arc-starting plate then leads the arc away to extinguish the arc. After the moving contact blade is completely separated from the static contact 10, the moving contact blade is also separated from the static arc contact 9, and then the spring 16 is restored from the compressed state to the initial state. During this process, the static arc contact 9 slides along the slide groove 17 to the outer side of the static connection plate 1 until the stopper 14 contacts the anti-dropping block 15 again.

[0027] like Figure 1 , 3 As shown in Figures 4 and 5, the utility model provides a static contact of a frame circuit breaker with fast arc striking, wherein the arc striking plate comprises a mounting plate 3, a first arc striking sub-plate 4 and a second arc striking sub-plate 2, the mounting plate 3 is arranged in the horizontal direction and fixed on the upper side of the static connecting plate 1, the first arc striking sub-plate 4 and the second arc striking sub-plate 2 are both arranged in the vertical direction, the lower ends of the first arc striking sub-plate 4 and the second arc striking sub-plate 2 are respectively fixedly connected to the two ends of the mounting plate 3, the mounting plate 3, the first arc striking sub-plate 4 and the second arc striking sub-plate 2 together form a U-shaped structure, the first arc striking sub-plate 4 is arranged close to the end of the static connecting plate 1, and the second arc striking sub-plate 2 is arranged away from the end of the static connecting plate 1.

[0028] The utility model provides a frame circuit breaker static contact with fast arc striking, wherein the first arc striking plate 4 includes a first inclined portion 8, a first straight portion 7, a second inclined portion 6 and a second straight portion 5 which are sequentially connected from bottom to top, the first inclined portion 8 is inclined from bottom to top toward the second arc striking plate 2, the first straight portion 7 is arranged perpendicular to the mounting plate 3, the second inclined portion 6 is arranged from bottom to top in a direction away from the second arc striking plate 2, the second straight portion 5 is arranged perpendicular to the mounting plate 3, the second arc striking plate 2 is a straight plate, the second arc striking plate 2 is arranged perpendicular to the mounting plate 3, and the upper end surface of the second arc striking plate 2 and the upper end surface of the first straight portion 7 are located in the same horizontal plane.

[0029] The utility model provides a frame circuit breaker static contact with fast arc striking, wherein the first inclined portion 8 is provided with a first arc striking opening 19, the first straight portion 7 is provided with a second arc striking opening 18, the first inclined portion 8 and the first straight portion 7 are also provided with an arc striking groove 20, one end of the arc striking groove 20 is connected to the second arc striking opening 18, and the other end of the arc striking groove 20 extends downward through the first arc striking opening 19 to the lower end of the first inclined portion 8.

[0030] In the utility model, the fast arc-striking frame circuit breaker static contact, the first arc-striking sub-plate 4 and the second arc-striking sub-plate 2 are all provided with rounded corners between the mounting plate 3 .

[0031] In the present invention, the length of the first arc-striking plate 4 is greater than that of the second arc-striking plate 2, so that the arc-striking effect of the arc-striking plate can be improved. The second inclined portion 6 can quickly strike an arc. In addition, the static arc contact 9 is arranged on the static connection plate 1 to effectively prevent the impact on the arc-striking plate and improve the service life of the arc-striking plate.

[0032] like Figure 1-5 As shown, the mounting plate 3 and the support plate 12 are fixed on the static connection plate 1 by bolts 11, that is, the screw rod 22 of the bolt 11 passes through the mounting plate 3, the static connection plate 1 and the support plate 12 from top to bottom in sequence and then is threadedly connected with the nut 21.

[0033] The difference between the static contact of the frame circuit breaker with fast arc striking of the utility model and the prior art is that the static arc contact 9 of the static contact of the frame circuit breaker with fast arc striking of the utility model is elastically arranged at the end of the static connecting plate 1, so that when the frame circuit breaker is closed or opened, the moving contact knife can elastically contact the static arc contact 9, so that the two can be fully buffered during the contact process, thereby avoiding damage to components and extending the service life of the static contact.

[0034] It should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "front", "back", "left", "right", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A fast arc-striking frame circuit breaker static contact, characterized in that: It includes a static connecting plate, a support plate and an arc-striking plate, wherein the arc-striking plate is fixedly provided on the upper side of the static connecting plate, the support plate is fixedly provided on the lower side of the static connecting plate, a static arc contact and a static contact are provided at the end of the static connecting plate, the static arc contact and the static contact are arranged at intervals in the up and down directions, the static arc contact is elastically provided at the end of the static connecting plate, the static arc contact can elastically move outside or inside the end of the static connecting plate, and the static contact is fixedly provided at the end of the static connecting plate.

2. The fast arc-striking frame circuit breaker static contact according to claim 1, characterized in that: A slide groove is provided at the end of the static connecting plate, and the slide groove extends in a direction from the outside to the inside of the end of the static connecting plate. A static arc contact with a block structure is slidably provided in the slide groove. A spring is provided between the static arc contact and the slide groove wall away from the end of the static connecting plate. Under the action of the spring, the static arc contact can slide elastically along the slide groove to the outside or inside of the end of the static connecting plate.

3. The fast arc-striking frame circuit breaker static contact according to claim 2, characterized in that: An anti-slip block is fixedly provided at the end of the slide groove near the static connecting plate, and a stopper used in conjunction with the anti-slip block is fixedly provided on the static arc contact. When the static arc contact slides along the slide groove toward the end of the static connecting plate, the stopper can abut against the anti-slip block.

4. The fast arc-striking frame circuit breaker static contact according to claim 3, characterized in that: Two blind holes are provided on the slide groove wall away from the end of the static connecting plate, and the two blind holes are arranged in the horizontal direction. The springs are provided in two, and one end of the two springs is respectively inserted in the two blind holes, and the other ends of the two springs are abutted against the static arc contacts.

5. The fast arc-striking frame circuit breaker static contact according to claim 4, characterized in that: The arc-striking plate includes a mounting plate, a first arc-striking sub-plate and a second arc-striking sub-plate. The mounting plate is arranged in a horizontal direction and fixed on the upper side of the static connecting plate. The first arc-striking sub-plate and the second arc-striking sub-plate are both arranged in a vertical direction. The lower ends of the first arc-striking sub-plate and the second arc-striking sub-plate are respectively fixedly connected to the two ends of the mounting plate. The mounting plate, the first arc-striking sub-plate and the second arc-striking sub-plate together form a U-shaped structure. The first arc-striking sub-plate is arranged close to the end of the static connecting plate, and the second arc-striking sub-plate is arranged away from the end of the static connecting plate.

6. The fast arc-striking frame circuit breaker static contact according to claim 5, characterized in that: The first arc-striking splitter plate includes a first inclined portion, a first straight portion, a second inclined portion and a second straight portion which are sequentially connected from bottom to top, the first inclined portion is inclined from bottom to top toward the second arc-striking splitter plate, the first straight portion is arranged perpendicular to the mounting plate, the second inclined portion is arranged from bottom to top in a direction away from the second arc-striking splitter plate, the second straight portion is arranged perpendicular to the mounting plate, the second arc-striking splitter plate is a straight plate, the second arc-striking splitter plate is arranged perpendicular to the mounting plate, and the upper end surface of the second arc-striking splitter plate and the upper end surface of the first straight portion are located in the same horizontal plane.

7. The fast arc-striking frame circuit breaker static contact according to claim 6, characterized in that: A first arc-starting opening is provided on the first inclined portion, a second arc-starting opening is provided on the first straight portion, and an arc-starting groove is also provided on the first inclined portion and the first straight portion. One end of the arc-starting groove is connected to the second arc-starting opening, and the other end of the arc-starting groove passes downward through the first arc-starting opening and extends to the lower end of the first inclined portion.

8. The fast arc-striking frame circuit breaker static contact according to claim 7, characterized in that: Rounded corners are arranged between the first arc-striking sub-plate, the second arc-striking sub-plate and the mounting plate.

Images