Arc extinguishing device of circuit breaker

Abstract

The utility model belongs to the technical field of circuit breaker arc extinguishing, and discloses an arc extinguishing device of a circuit breaker, which comprises a shell, a fixed block fixedly arranged in the left side of the shell, an interface end fixedly arranged in the fixed block, a guide pipe fixedly arranged on the right side of the interface end, and an arc extinguishing assembly arranged in the guide pipe. The arc extinguishing assembly comprises a pipe body arranged in the guide pipe in a sliding mode, fixing plates are fixedly arranged on the upper side and the lower side of the right side of the pipe body, sealing blocks are arranged on the outer sides of the fixing plates in a sliding mode, and the sealing blocks and the pipe body are arranged in a sliding mode. And after being separated from the sealing blocks, the sealing blocks at the other end can be directly pushed to be close to each other and closed together through the pushing of the spring on the outer side of the telescopic shaft to form a closed state, so that the electric arc is effectively blocked and sealed, and the size of the circuit breaker can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of arc extinguishing of circuit breakers, in particular to an arc extinguishing device of a circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time. The arc extinguishing device allows the arc to contact with a solid medium to reduce the arc temperature and thus accelerate the extinction of the arc. Some arcs will still emit during the arc extinguishing operation.

[0003] At the same time, the application number CN202320330890.7 is an arc extinguishing device for a molded case circuit breaker, "including an arc extinguishing hood and an arc extinguishing sheet, the arc extinguishing hood is provided with a plurality of partitions, the partitions separate the arc extinguishing hood into a plurality of chambers, each chamber is provided with a plurality of slots, the arc extinguishing sheet is inserted into the slots and fixed, the arc extinguishing sheet is provided with a plurality of through holes, and the arc extinguishing hood is connected and fixed to the molded case circuit breaker";

[0004] During use, the existing arc extinguishing device is divided into multiple different chambers to quickly extinguish the arc of the circuit breaker. However, the use of multiple chamber structures inside the circuit breaker will occupy the space of the arc extinguishing device, the overall space of the arc extinguishing structure will be expanded, the occupied space is larger, and the arc extinguishing effect transmission range is longer, which reduces the use effect of the arc extinguishing device of the circuit breaker.

[0005] Therefore, in order to solve the above problems, an arc extinguishing device for a circuit breaker is proposed. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides an arc extinguishing device for a circuit breaker, which has the advantages of being able to quickly block the arc through an automatically closed structural design and reducing the size of the arc extinguishing device.

[0007] To achieve the above object, the utility model provides the following technical solution: an arc extinguishing device for a circuit breaker, comprising a housing, a fixed block is fixedly arranged inside the left side of the housing, an interface end is fixedly arranged inside the fixed block, a guide tube is fixedly arranged on the right side of the interface end, and an arc extinguishing assembly is also arranged inside the guide tube;

[0008] The arc extinguishing assembly includes a tube body slidably arranged inside the guide tube, and fixed plates are fixedly arranged on the upper and lower sides of the right side of the tube body. A closing block is slidably arranged on the outer side of the fixing plate, and the closing block is slidably arranged with the tube body. A connecting end is slidably arranged on the outer side of the tube body, and the connecting end is fixedly arranged with the outer shell.

[0009] Preferably, a rotating rod is rotatably provided inside the closing block, a telescopic shaft is fixedly provided on the outer side of the rotating rod, a rotating shaft is fixedly provided on the other end of the telescopic shaft, and the rotating shaft is rotatably provided with the fixing plate.

[0010] Preferably, a spring is sleeved on the outer side of the telescopic shaft, and the spring is located between the rotating rod and the rotating shaft.

[0011] Preferably, arc grooves are provided at positions where the two closing blocks face each other, and the closing blocks are arranged in a closed state when in a fitted state.

[0012] Preferably, side frames are inserted and arranged inside both the front and rear sides of the tube body, and arc-extinguishing resistor sheets are fitted and arranged on the outer sides of the side frames.

[0013] Preferably, friction plates are fixedly arranged inside the upper and lower ends of the side frame, and a pulley is rotatably arranged on the left side of the friction plate.

[0014] Preferably, an insertion shaft is fixedly provided on the outer side of the arc-extinguishing resistor sheet, a positioning hole is opened on the surface of the side frame, and the insertion shaft is located inside the positioning hole.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model cooperates with the closing block and the telescopic shaft structure in the arc extinguishing assembly. When the tube body moves away from the connecting rod at the connecting end, after the closing block is separated, the spring on the outside of the telescopic shaft can be used to directly push the closing blocks at the other end to close together to form a closed state, thereby effectively blocking and sealing the arc and effectively reducing the size of the circuit breaker.

[0017] 2. The utility model can insert the side frame into the interior of the tube body through the arc-extinguishing resistor and the side frame structure. The installed multiple arc-extinguishing resistor structures can directly increase the guidance of the arc inside, thereby accelerating the arc-extinguishing efficiency without increasing the volume of the circuit breaker arc-extinguishing device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a partial cross-sectional structural schematic diagram of the arc extinguishing assembly of the utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of the closing block of the utility model;

[0021] Figure 4 This is a schematic diagram of the installation structure of the side frame of the utility model;

[0022] Figure 5It is an enlarged structural schematic diagram of the arc-extinguishing resistor of the utility model.

[0023] In the figure: 1. housing; 2. fixing block; 3. interface end; 4. guide tube;

[0024] 5. Arc extinguishing assembly; 51. Tube body; 52. Fixed plate; 53. Closing block; 54. Rotating rod; 55. Telescopic shaft; 56. Spring; 57. Rotating shaft;

[0025] 6. Connecting end; 7. Side frame; 8. Arc-extinguishing resistor; 9. Friction plate; 10. Plug shaft; 11. Positioning hole; 12. Pulley. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figures 1 to 5 As shown, the utility model provides an arc extinguishing device for a circuit breaker, comprising a housing 1, a fixed block 2 is fixedly arranged inside the left side of the housing 1, an interface end 3 is fixedly arranged inside the fixed block 2, a guide tube 4 is fixedly arranged on the right side of the interface end 3, and a tube body 51 inside an arc extinguishing component 5 inside the guide tube 4 can be controlled to move, and the guide tube 4 also includes an arc extinguishing component 5;

[0028] The arc extinguishing assembly 5 includes a tube body 51 slidably arranged inside the guide tube 4, and fixed plates 52 are fixedly arranged on the upper and lower sides of the right side of the tube body 51. A closing block 53 is slidably arranged on the outer side of the fixed plate 52, and the closing block 53 is slidably arranged with the tube body 51. A connecting end 6 is slidably arranged on the outer side of the tube body 51, and the connecting end 6 is fixedly arranged with the outer shell 1. The internally arranged closing block 53 structure can be closed inside the interface end 3.

[0029] Specifically, a rotating rod 54 is rotatably provided inside the closing block 53, a telescopic shaft 55 is fixedly provided on the outer side of the rotating rod 54, a rotating shaft 57 is fixedly provided on the other end of the telescopic shaft 55, and the rotating shaft 57 is rotatably provided with the fixed plate 52, and the telescopic shaft 55 connects the fixed plate 52 and the closing block 53 structure for rotational guidance.

[0030] Furthermore, a spring 56 is sleeved on the outer side of the telescopic shaft 55, and the spring 56 is located between the rotating rod 54 and the rotating shaft 57. By pushing the spring 56 on the outer side of the telescopic shaft 55, the telescopic shaft 55 can be controlled to open quickly to keep the outer side of the middle connecting rod of the clamping connecting end 6 tight.

[0031] Furthermore, arc grooves are provided at the positions where the two closing blocks 53 face each other, and the closing blocks 53 are set in a closed state when in a fitted state, so as to quickly isolate the arc.

[0032] It is worth mentioning that side frames 7 are inserted into the front and rear sides of the tube body 51, and arc-extinguishing resistor sheets 8 are fitted on the outer sides of the side frames 7. The added arc-extinguishing resistor sheet 8 structure can greatly increase the resistance of the current and improve the arc-extinguishing efficiency.

[0033] It is worth noting that friction plates 9 are fixedly installed inside the upper and lower ends of the side frame 7, and a pulley 12 is rotatably installed on the left side of the friction plate 9. The side frame 7 can quickly enter the interior of the tube body 51 through the pulley 12 and cooperate with the friction plate 9 for rapid positioning.

[0034] It is worth mentioning that an insertion shaft 10 is fixedly provided on the outer side of the arc-extinguishing resistor 8, a positioning hole 11 is opened on the surface of the side frame 7, and the insertion shaft 10 is located inside the positioning hole 11. The arc-extinguishing resistor 8 is inserted into the positioning hole 11 through the insertion shaft 10 for quick assembly.

[0035] Among them, the interface terminal 3, the arc-extinguishing resistor 8 and the connection terminal 6 are existing technologies and will not be described in detail; at the same time, the utility model also includes a power supply, a controller and a switch, which are not the main technical points of this patent and will not be described in detail.

[0036] Working principle and process:

[0037] During the use of the arc extinguishing device of the circuit breaker, the internal interface end 3 of the fixed block 2 of the control housing 1 and the arc extinguishing component 5 inside the guide tube 4 work, driving the tube body 51 in the arc extinguishing component 5 to move inside the guide tube 4, and the connecting rod at the middle position of the connecting end 6 gradually opens. During the separation process, an arc is generated. When the connecting rod passes through the closing block 53, the fixed plate 52 connects the rotating rod 54 and the closing block 53 structure through the internal rotating shaft 57 and the outer telescopic shaft 55. The spring 56 can directly push the closing block 53 to close, close the tube body 51, and block the arc. The arc that partially passes through is guided by the arc extinguishing resistor 8 structure on the outside of the side frame 7 to speed up the arc extinguishing efficiency. Among them, the side frame 7 structure can be installed according to the use requirements of the circuit. If it needs to be installed, the side frame 7 can be quickly inserted into the tube body 51 through the pulley 12, and the friction plate 9 can be stably clamped in the tube body 51, which is more convenient to use.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An arc extinguishing device for a circuit breaker, comprising a housing (1), characterized in that: A fixing block (2) is fixedly arranged inside the left side of the housing (1), an interface end (3) is fixedly arranged inside the fixing block (2), a guide tube (4) is fixedly arranged on the right side of the interface end (3), and an arc extinguishing component (5) is also arranged inside the guide tube (4); The arc extinguishing assembly (5) comprises a tube body (51) slidably arranged inside the guide tube (4); fixing plates (52) are fixedly arranged on both upper and lower sides of the right side of the tube body (51); a closing block (53) is slidably arranged on the outer side of the fixing plate (52); the closing block (53) is slidably arranged on the tube body (51); a connecting end (6) is slidably arranged on the outer side of the tube body (51); and the connecting end (6) is fixedly arranged on the outer side of the tube body (51).

2. The arc extinguishing device of a circuit breaker according to claim 1, characterized in that: A rotating rod (54) is rotatably arranged inside the closing block (53), a telescopic shaft (55) is fixedly arranged outside the rotating rod (54), a rotating shaft (57) is fixedly arranged at the other end of the telescopic shaft (55), and the rotating shaft (57) is rotatably arranged with the fixing plate (52).

3. The arc extinguishing device of a circuit breaker according to claim 2, characterized in that: A spring (56) is sleeved on the outer side of the telescopic shaft (55), and the spring (56) is located between the rotating rod (54) and the rotating shaft (57).

4. The arc extinguishing device of a circuit breaker according to claim 1, characterized in that: Arc grooves are provided at positions where the two closing blocks (53) face each other, and the closing blocks (53) are arranged in a closed state when in a fitted state.

5. The arc extinguishing device of a circuit breaker according to claim 1, characterized in that: Side frames (7) are inserted and arranged inside both the front and rear sides of the tube body (51), and arc-extinguishing resistor sheets (8) are fitted and arranged on the outside of the side frames (7).

6. The arc extinguishing device of a circuit breaker according to claim 5, characterized in that: Friction plates (9) are fixedly arranged inside the upper and lower ends of the side frame (7), and a pulley (12) is rotatably arranged on the left side of the friction plate (9).

7. The arc extinguishing device of a circuit breaker according to claim 5, characterized in that: An insertion shaft (10) is fixedly arranged on the outer side of the arc-extinguishing resistor sheet (8), a positioning hole (11) is opened on the surface of the side frame (7), and the insertion shaft (10) is located inside the positioning hole (11).

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