Arc extinguishing structure of circuit breaker

Abstract

The utility model relates to the technical field of circuit breaker arc extinguishing, in particular to a circuit breaker arc extinguishing structure, which comprises a base, a plurality of second arc extinguishing sheets are inserted in the base, two outer side walls of the second arc extinguishing sheets are respectively and movably connected with a first arc extinguishing sheet and a third arc extinguishing sheet, two outer side walls of the second arc extinguishing sheets are respectively provided with two long grooves, and the first arc extinguishing sheet and the third arc extinguishing sheet are arranged in the long grooves. According to the utility model, not only can the plurality of arc extinguishing sheets I, the plurality of arc extinguishing sheets II and the plurality of arc extinguishing sheets III be integrally disassembled and assembled, but also a group of arc extinguishing sheets I, arc extinguishing sheets II and arc extinguishing sheets III can be independently disassembled and assembled, so that the disassembly and assembly of the arc extinguishing sheets I, arc extinguishing sheets II and arc extinguishing sheets III can be realized, and the disassembly and assembly of the arc extinguishing sheets I, arc extinguishing sheets II and arc extinguishing sheets III can be realized. And the arc extinguishing sheet I and the arc extinguishing sheet III are made of ceramic materials, so that the two side walls of the arc extinguishing sheet II can be protected, the wear resistance and the heat resistance can be improved, and the arc extinguishing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of arc extinguishing technology for circuit breakers, specifically to the arc extinguishing structure of circuit breakers. Background Technology

[0002] In circuit breakers, the process of connecting and disconnecting current is often accompanied by the generation and extinguishing of an electric arc. An electric arc is a gas discharge phenomenon that can be harmful to electrical appliances. This paper introduces the phenomenon of electric arc, analyzes the causes of its generation and extinguishing, and introduces commonly used arc extinguishing methods and devices in electrical appliances to address the impact of electric arcs on electrical appliances.

[0003] In the prior art, such as the arc extinguishing structure of a circuit breaker proposed in patent application number "CN202222303388.5", this utility model realizes the fixed snap-fit ​​of the first mounting plate and the second mounting plate through the first snap-fit ​​part and the second snap-fit ​​part. In addition, the snap-fit ​​block and the fixing hole further realize the fixed riveting, which improves the stability of installation and makes the assembly more convenient.

[0004] However, in the aforementioned patent application, when assembling the arc plates, multiple arc plates need to be snapped together sequentially. Furthermore, when disassembly and maintenance are required later, it is not possible to disassemble the multiple arc plates as a whole; they must be disassembled sequentially, which is inconvenient and affects the efficiency of assembly and subsequent maintenance work. Utility Model Content

[0005] The purpose of this invention is to provide an arc-extinguishing structure for circuit breakers to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] The arc-extinguishing structure of the circuit breaker includes a base, inside which are inserted a plurality of arc-extinguishing plates 2. Arc-extinguishing plates 1 and 3 are movably connected to the two outer side walls of the plurality of arc-extinguishing plates 2. Each of the two outer side walls of the arc-extinguishing plates 2 has two long slots. Inserts are inserted into the four long slots. Two of the inserts are fixedly connected to arc-extinguishing plates 1, and the other two inserts are fixedly connected to arc-extinguishing plates 3. A connecting mechanism is provided between the two outer side walls of the arc-extinguishing plates 2 and the inner wall of the base. A connecting block is fixedly connected to the inner wall of the plurality of arc-extinguishing plates 2. A limit mechanism is provided between the two outer side walls of the connecting block and arc-extinguishing plates 2 and 3.

[0008] The connecting mechanism includes a slot that extends through the outer wall of the base. A plate is inserted into the slot, and a stop bar is rotatably connected to one end of the inner wall of the slot via a shaft.

[0009] Preferably, a limiting groove is formed on the other inner side wall of the slot near one end, a slide rod is fixedly connected to the upper surface of the base, and a toggle plate is sleeved on the outside of the slide rod.

[0010] Preferably, a limiting spring is sleeved on the outside of the slide bar, a fixed plug is fixedly connected to one end of the actuating plate, and the fixed plug is inserted into the outer wall of the base. A groove is opened at one end of the plug, and the groove fits with the stop bar. A fixing hole is opened on the upper surface of the stop bar and located directly below the fixed plug, and the fixing hole fits with the fixed plug.

[0011] Preferably, the inner wall of the insert plate has a plurality of fixing slots, and a connecting block is inserted into each of the fixing slots. The two outer side walls of the connecting block have movable slots, and a locking block is inserted into each of the two movable slots. A return spring is installed between one end of the locking block and the inner wall of the movable slot. The two inner side walls of the fixing slot have locking grooves, and the locking grooves fit into the locking blocks.

[0012] Preferably, the limiting mechanism includes a connecting block and a bolt. The connecting block is fixedly connected to the outer wall of the arc extinguishing plate, and the bolt is fixedly connected to the outer wall of the connecting block. The outer wall of the connecting block has a square groove.

[0013] Preferably, a stop block is fitted on the outside of the bolt, and a circular hole is opened through the outer wall of the stop block, and a thread that matches the bolt is opened on the inner wall of the circular hole.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model, through the combination of a stop bar, a insert plate, and a slot, allows multiple arc-extinguishing plates (I, II, and III) to be installed as a whole within the base, or to be removed as a whole. The arc-extinguishing plate II to be disassembled must be able to be pulled outwards from the base, causing the two locking blocks to move outwards along the fixing grooves, releasing the fixation between the connecting block and the insert plate. Subsequently, the connecting blocks installed on both sides of the arc-extinguishing plate II only need to be re-engaged into the fixing grooves, allowing the locking blocks to engage with the return springs and re-engage into the slots. This fixes the position of the connecting blocks on the insert plate, completing the installation and fixation of the set of arc-extinguishing plates I, II, and III. Through the above operations, not only can multiple arc-extinguishing plates I, II, and III be disassembled and assembled as a whole, but also a single set of arc-extinguishing plates I, II, and III can be disassembled and assembled, making assembly and subsequent maintenance more convenient.

[0016] 2. In this utility model, both the first and third arc-extinguishing plates are made of ceramic material, which can protect the two side walls of the second arc-extinguishing plate while also improving wear resistance and heat resistance. The heights of the first and third arc-extinguishing plates are both smaller than the height of the second arc-extinguishing plate, while the height of the third arc-extinguishing plate is greater than the height of the first arc-extinguishing plate. This makes the arc more tortuous as it passes through the arc-extinguishing plates, extending the path of the arc through the first, second, and third arc-extinguishing plates, thereby improving the arc-extinguishing effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a partial structural schematic diagram of the present invention;

[0021] Figure 4 This is a partial right view of the middle support strip and the base of this utility model;

[0022] Figure 5 These are diagrams of arc extinguishing plate one, arc extinguishing plate two, and arc extinguishing plate three in this utility model;

[0023] Figure 6 This utility model Figure 5 Enlarged view of point B in the middle;

[0024] Figure 7 This is a partial cross-sectional view of the insert plate in this utility model.

[0025] The attached figures are labeled as follows:

[0026] 1. Base; 2. Insert plate; 3. Slot; 4. Arc extinguishing plate one; 5. Arc extinguishing plate two; 6. Connecting block; 7. Stop bar; 8. Fixed insert rod; 9. Slide rod; 10. Bolt; 11. Stop block; 12. Connecting block; 13. Actuating plate; 14. Locking block; 15. Locking groove; 16. Limiting groove; 17. Movable groove; 18. Insert bar; 19. Arc extinguishing plate three; 21. Long groove; 22. Groove; 23. Fixed groove; 24. Square groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] Circuit breaker arc extinguishing structure, such as Figures 1-7 As shown, the system includes a base 1, inside which are inserted several arc-extinguishing plates 2 5. Arc-extinguishing plates 1 4 and 3 19 are movably connected to the two outer walls of each arc-extinguishing plate 2 5. Each outer wall of the arc-extinguishing plate 2 5 has two long slots 21. Inserts 18 are inserted into each of the four long slots 21, with two inserts 18 fixedly connected to arc-extinguishing plates 1 4 and the other two inserts 18 fixedly connected to arc-extinguishing plates 3 19. A connecting mechanism is provided between the two outer walls of the arc-extinguishing plates 2 5 and the inner wall of the base 1. Connecting blocks 6 are fixedly connected to the inner walls of each arc-extinguishing plate 2 5. Limiting mechanisms are provided between the two outer walls of the connecting blocks 6 and the arc-extinguishing plates 2 5 and 3 19. The connecting mechanism includes a slot 3, which is formed through the outer wall of the base 1. An insert plate 2 is inserted inside the slot 3. A stop bar 7 is rotatably connected to one end of the inner wall of the slot 3 via a shaft.

[0029] A limiting groove 16 is provided on the other inner side wall of slot 3 near one end. A slide rod 9 is fixedly connected to the upper surface of base 1. A toggle plate 13 is sleeved on the outside of slide rod 9. A limiting spring is sleeved on the outside of slide rod 9. A fixed insertion rod 8 is fixedly connected to one end of toggle plate 13 and is inserted into the outer side wall of base 1. A groove 22 is provided on one end of insertion plate 2 and the groove 22 fits with the stop bar 7. A fixing hole is provided on the upper surface of stop bar 7 and located directly below the fixed insertion rod 8, and the fixing hole fits with the fixed insertion rod 8.

[0030] The inner wall of the insert plate 2 has several fixing slots 23, and a connecting block 6 is inserted into each of the fixing slots 23. The two outer side walls of the connecting block 6 have movable slots 17, and a locking block 14 is inserted into each of the two movable slots 17. A return spring is installed between one end of the locking block 14 and the inner wall of the movable slot 17. The two inner side walls of the fixing slot 23 have locking grooves 15, and the locking grooves 15 fit into the locking block 14.

[0031] In use, the arc-extinguishing structure is located inside the circuit breaker cavity. When assembling the arc-extinguishing structure, the actuating plate 13 is moved away from the base 1 along the slide bar 9, the limiting spring is compressed, and the fixed insert 8 is moved out of the fixing hole, releasing the fixation of the stop bar 7. Then the stop bar 7 is rotated out of the limiting groove 16, releasing the obstruction on one side of the slot 3. Then the two insert plates 2 are inserted into the two slots 3 respectively. Then the stop bar 7 is rotated so that one end of the stop bar 7 is inserted into the limiting groove 16 and the middle part of the stop bar 7 is inserted into the groove 22. The actuating plate 13 is released. Under the action of the limiting spring, the actuating plate 13 can be moved along the slide bar 9 towards the base 1, thereby driving the fixed insert 8 to be re-inserted into the fixing hole, fixing the position of the stop bar 7, thereby effectively limiting the position of the insert plate 2 inside the slot 3, thus conveniently installing each arc-extinguishing piece 1 4, arc-extinguishing piece 2 5 and arc-extinguishing piece 3 19 inside the base 1.

[0032] When it is necessary to disassemble all the arc-extinguishing plates 1-4, 2-5, and 3-19 as a whole, the fixing of the stop bar 7 should be removed, and then the insert plate 2 should be removed from the slot 3 to remove all the arc-extinguishing plates 1-4, 2-5, and 3-19 from the base 1 as a whole. When it is necessary to disassemble one set of arc-extinguishing plates 1-4, 2-5, and 3-19 individually, simply pull the arc-extinguishing plate 2-5 to be disassembled outward from the base 1, so that the two locking blocks 14 move outward along the fixing groove 23, driving the locking blocks 14 to move along the inside of the locking groove 15. The inclined surface of the locking block 14 moves along the inner wall of the locking groove 15 and can gradually retract into the movable groove. Within 17, the fixing between the connecting block 6 and the insert plate 2 is released, and the return spring is compressed, so that the connecting block 6 can be moved out of the fixing groove 23. Then, the set of arc extinguishing plate 1 4, arc extinguishing plate 2 5 and arc extinguishing plate 3 19 can be moved out of the base 1. Similarly, when installation is required, simply re-insert the connecting blocks 6 installed on both sides of the arc extinguishing plate 2 5 into the fixing groove 23, so that the two locking blocks 14 move to the position close to the locking groove 15, and under the action of the return spring, re-insert them into the locking groove 15, fixing the position of the connecting block 6 on the insert plate 2, thus completing the installation and fixing of the set of arc extinguishing plate 1 4, arc extinguishing plate 2 5 and arc extinguishing plate 3 19.

[0033] The limiting mechanism includes a connecting block 12 and a bolt 10. The connecting block 12 is fixedly connected to the outer wall of the arc extinguishing plate 4, and the bolt 10 is fixedly connected to the outer wall of the connecting block 6. The outer wall of the connecting block 12 has a square groove 24. A stop block 11 is sleeved on the outside of the bolt 10. A circular hole is opened through the outer wall of the stop block 11. The inner wall of the circular hole has a thread that matches the bolt 10. Through the engagement of the thread, the stop block 11 can be rotated along the bolt 10 and fastened to one side of the connecting block 12, thereby fixing the position between the connecting block 12 and the connecting block 6.

[0034] Specifically, both arc extinguishing disc 1 (4) and arc extinguishing disc 3 (19) are made of ceramic, which not only protects the two side walls of arc extinguishing disc 2 (5) but also improves wear resistance and heat resistance. The heights of arc extinguishing discs 1 (4) and 3 (19) are smaller than the height of arc extinguishing disc 2 (5), while the height of arc extinguishing disc 3 (19) is greater than the height of arc extinguishing disc 1 (4). This makes the arc's subsequent path more tortuous, extending the arc's path through arc extinguishing discs 1 (4), 2 (5), and 3 (19), thus improving the arc extinguishing effect. When a short circuit or overload occurs in the circuit connected to the circuit breaker, the arc generated when the power is cut off can flow and diffuse through arc extinguishing discs 1 (4), 2 (5), and 3 (19), eventually disappearing, thereby reducing discharge energy and preventing arc explosion. Furthermore, by using the baffle... After block 11 rotates 90° along bolt 10, connecting block 12 can be moved away from connecting block 6, so that stop block 11 passes through square groove 24, and arc extinguishing plate 14 can be moved out from one side of arc extinguishing plate 25. Similarly, insert strip 18 on another arc extinguishing plate 14 can be inserted into long groove 21, so that connecting block 12 passes through square groove 24, passes through stop block 11 and is placed close to connecting block 6. Then, stop block 11 is rotated to the initial position, so that the position of connecting block 12 can be well fixed on the outer wall of connecting block 6, thereby fixing the position of arc extinguishing plate 14 on the outer wall of arc extinguishing plate 25, which is convenient for timely replacement of arc extinguishing plate 25. Similarly, arc extinguishing plate 3 19 can be replaced in time, thereby ensuring the protective effect of arc extinguishing plate 25.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A circuit breaker arc-extinguishing structure, comprising a base (1), characterized in that, The base (1) is equipped with several arc-extinguishing plates (5) inserted inside. Arc-extinguishing plates (4) and arc-extinguishing plates (19) are movably connected to the two outer walls of the arc-extinguishing plates (5). Two long slots (21) are opened on the two outer walls of the arc-extinguishing plates (5). Inserts (18) are inserted into the four long slots (21). Two inserts (18) are fixedly connected to the arc-extinguishing plates (4), and the other two inserts (18) are fixedly connected to the arc-extinguishing plates (19). A connecting mechanism is provided between the two outer walls of the arc-extinguishing plates (5) and the inner wall of the base (1). Connecting blocks (6) are fixedly connected to the inner walls of the arc-extinguishing plates (5). Limiting mechanisms are provided between the two outer walls of the connecting blocks (6) and the arc-extinguishing plates (5) and (19). The connecting mechanism includes a slot (3), which is opened through the outer wall of the base (1). A plate (2) is inserted inside the slot (3), and a stop bar (7) is rotatably connected to the inner wall of the slot (3) near one end via a shaft.

2. The circuit breaker arc-extinguishing structure according to claim 1, characterized in that, A limiting groove (16) is provided on the other inner side wall of the slot (3) near one end. A slide rod (9) is fixedly connected to the upper surface of the base (1). A toggle plate (13) is sleeved on the outside of the slide rod (9).

3. The circuit breaker arc-extinguishing structure according to claim 2, characterized in that, The slide bar (9) is fitted with a limiting spring. One end of the actuating plate (13) is fixedly connected to a fixing rod (8), and the fixing rod (8) is inserted into the outer wall of the base (1). One end of the insert plate (2) is provided with a groove (22), and the groove (22) fits with the stop bar (7). The upper surface of the stop bar (7) is provided with a fixing hole located directly below the fixing rod (8), and the fixing hole fits with the fixing rod (8).

4. The circuit breaker arc-extinguishing structure according to claim 1, characterized in that, The inner wall of the insert plate (2) is provided with a plurality of fixing slots (23), and a connecting block (6) is inserted into each of the fixing slots (23). The two outer side walls of the connecting block (6) are provided with movable slots (17), and two movable slots (17) are provided with locking blocks (14). A return spring is installed between one end of the locking block (14) and the inner wall of the movable slot (17). The two inner side walls of the fixing slot (23) are provided with locking grooves (15), and the locking grooves (15) fit into the locking blocks (14).

5. The circuit breaker arc-extinguishing structure according to claim 1, characterized in that, The limiting mechanism includes a connecting block (12) and a bolt (10). The connecting block (12) is fixedly connected to the outer wall of the arc extinguishing plate (4), and the bolt (10) is fixedly connected to the outer wall of the connecting block (6). The outer wall of the connecting block (12) is provided with a square groove (24).

6. The circuit breaker arc-extinguishing structure according to claim 5, characterized in that, The bolt (10) is fitted with a stop (11) on the outside. The outer wall of the stop (11) has a through hole, and the inner wall of the hole has a thread that matches the bolt (10).

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