Multi-arc circuit breaker

Abstract

The invention discloses a multi-arc circuit breaker. The circuit breaker mainly solves the problems that an arc running channel of a conventional circuit breaker uniformly enters an arc extinguish chamber, the overall arc energy is large, and the extinguishing speed is not high. The circuit breaker is characterized by further comprising a partition plate (5) which is arranged in the arc running channel and divides the arc running channel into at least two flow channels (51) arranged in the thickness direction of the shell, and each flow channel is communicated with the arc extinguishing chamber. According to the multi-arc-channel circuit breaker provided by the invention, the arc is divided into small sub-arcs to form a plurality of arc channels for the arc to pass through, and then the sub-arcs enter the arc extinguish chamber to be extinguished, so that the arc extinguish efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of circuit breakers, and in particular to a multi-arc circuit breaker. Background Art

[0002] Miniature circuit breakers, also known as miniature circuit breakers, are suitable for overload and short-circuit protection of power lines. They can also be used for switching power lines during infrequent operation under normal circumstances. Miniature circuit breakers are primarily used in various locations, including industrial, commercial, high-rise, and residential buildings.

[0003] When the circuit breaker is disconnected, arcs and gas will be generated. These arcs will enter the arc extinguishing chamber through the arc running channel along with the gas and be divided and extinguished. The arc running channels of conventional circuit breakers enter the arc extinguishing chamber uniformly. The overall arc energy is large and the extinguishing speed is slow. Summary of the Invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides a multi-arc path circuit breaker, which mainly solves the problem that the arc running channels of conventional circuit breakers uniformly enter the arc extinguishing chamber, the overall arc energy is large, and the extinguishing speed is slow.

[0005] The technical solution of the present invention is: A multi-arc circuit breaker includes a housing, wherein a static contact, a moving contact and an arc extinguishing chamber are arranged in the housing, wherein the moving contact is arranged opposite to the static contact, and an arc running channel is formed between the moving contact and the arc extinguishing chamber; A partition is provided in the arc running channel and divides the arc running channel into at least two flow channels provided along the thickness direction of the shell, and each of the flow channels is communicated with the arc extinguishing chamber.

[0006] A second partition is provided in the arc extinguishing chamber, and the second partition divides the arc extinguishing chamber into at least two second flow channels, and the second flow channels are provided in a one-to-one correspondence with the first flow channels.

[0007] There are at least two partitions, and the partitions are made of gas-generating material.

[0008] A magnetizing plate is provided in the partition.

[0009] An arc striking plate is further provided in the shell, a first mounting portion is provided on the static contact, a second mounting portion is provided on the arc striking plate, one end of the partition is detachably connected to the first mounting portion, and the other end is detachably connected to the second mounting portion.

[0010] The first mounting portion is a mounting groove that penetrates the static contact.

[0011] The second baffles include multiple groups arranged front to back along the air intake direction, and fusion areas are provided between horizontally adjacent second baffles.

[0012] An air outlet is provided on the outer wall of the arc extinguishing chamber, a screw mounting hole and a lower exhaust hole are provided on the shell, and a diverter is installed on the back of the arc extinguishing chamber. The diverter diverts the airflow discharged from the air outlet into at least two airflows and discharges them out of the shell through the screw mounting hole or the lower exhaust hole.

[0013] The diverter includes a middle plate, and guide plates with curved surfaces are provided on both sides of the middle plate. A through groove is provided on the middle plate. The air outlet includes an upper air outlet, a middle air outlet and a lower air outlet. The middle air outlet is arranged opposite to the through groove, the upper air outlet is arranged opposite to the guide plate on one side, and the lower air outlet is arranged opposite to the guide plate on the other side.

[0014] A first air outlet duct and a second air outlet duct are provided in the shell. One end of the first air outlet duct is connected to the screw mounting hole, and the other end is connected to the lower air outlet hole. One end of the second air outlet duct is connected to the lower exhaust hole, and the other end is connected to the middle air outlet hole and the lower air outlet hole.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a multi-arc path circuit breaker, which divides the arc into smaller sub-arcs to form multiple arc paths for the arcs to pass through, and then enter the arc extinguishing chamber to extinguish respectively, thereby increasing the arc extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the internal structure of an embodiment of the present invention.

[0017] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the present invention.

[0018] Figure 3 It is a partial three-dimensional schematic diagram of an embodiment of the present invention.

[0019] Figure 4 It is a partial three-dimensional schematic diagram of an embodiment of the present invention.

[0020] Figure 5 It is a partial three-dimensional schematic diagram of an embodiment of the present invention.

[0021] Figure 6 Schematic diagram of a diverter according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings. A multi-arc-path circuit breaker includes a shell 1, in which a static contact 2, a moving contact 3 and an arc extinguishing chamber 4 are provided. The moving contact is arranged opposite to the static contact, and an arc running channel 11 is formed between the moving contact and the arc extinguishing chamber; it also includes a partition 5, which is arranged in the arc running channel and divides the arc running channel into at least two flow channels 51 arranged along the thickness direction of the shell, and each of the flow channels is connected to the arc extinguishing chamber. The gas and arc generated during disconnection are diverted into at least two flow channels by the partition, and then enter the arc extinguishing chamber for arc extinguishing, which is equivalent to dividing the high-energy arc into sub-arcs of smaller energy before entering the arc extinguishing chamber for division, thereby increasing the arc extinguishing efficiency. The thickness mentioned here can refer to Figure 2 In the figure, the arrow points to the flow direction, and multiple parallel arrows represent multiple flow channels.

[0023] In this embodiment, as shown in the figure, a second partition 41 is provided in the arc extinguishing chamber, and the second partition divides the arc extinguishing chamber into at least two second flow channels 42, and the second flow channels are arranged in a one-to-one correspondence with the flow channels. Figure 2 A plurality of second flow channels corresponding to the flow channels are provided to separate the arcs entering the arc extinguishing chamber.

[0024] In this embodiment, as shown in the figure, at least two partitions are provided, and the partitions are made of gas-generating materials, which facilitates the arc to enter the arc extinguishing chamber.

[0025] In this embodiment, as shown in the figure, a magnetizing plate 52 is provided inside the partition to increase the arc extinguishing capability.

[0026] In this embodiment, as shown in the figure, an arc-striking plate 6 is further provided within the housing. The static contact is provided with a first mounting portion 21, and the arc-striking plate is provided with a second mounting portion 61. One end of the partition is detachably connected to the first mounting portion, and the other end is detachably connected to the second mounting portion. Mounting the partition between the arc-striking plate and the static contact (the static contact comprises a static contact piece and a contact, with the first mounting portion located on the static contact piece) minimizes obstruction to the flow path, eliminates the need for additional mounting components, and facilitates assembly and disassembly.

[0027] In this embodiment, as shown in the figure, the first mounting portion is a mounting groove provided through the static contact.

[0028] In this embodiment, as shown in the figure, the second baffles include multiple groups arranged in a front-to-rear manner along the air inlet direction, and a fusion zone 43 is provided between adjacent horizontal second baffles. If the air pressure in each channel is different, the fusion zone can be used to adjust the pressure to ensure that the pressure in each channel is basically consistent.

[0029] In this embodiment, as shown in the figure, an air outlet 44 is provided on the outer wall of the arc extinguishing chamber, a screw mounting hole 12 and a lower exhaust hole 13 are provided on the housing, and a diverter 7 is mounted on the back of the arc extinguishing chamber. The diverter splits the airflow discharged from the air outlet into at least two streams, which are discharged out of the housing through the screw mounting hole or the lower exhaust hole. The extinguished arc in the arc extinguishing chamber is divided into two streams by the diverter and discharged out of the housing.

[0030] In this embodiment, as shown in the figure, the diverter includes a middle plate 71, with curved guide plates 72 provided on both sides of the middle plate. The middle plate is provided with a through-groove 711. The air outlets include an upper air outlet 441, a middle air outlet 442, and a lower air outlet 443. The middle air outlet is arranged opposite the through-groove, the upper air outlet is arranged opposite the guide plate on one side, and the lower air outlet is arranged opposite the guide plate on the other side. The guide plate contacts the back of the arc extinguishing chamber. When the air flows out, it flows out from the three air outlets and is diverted by contacting different parts of the diverter. Specifically, the middle air outlet is connected to the through-groove on the middle plate, the upper air outlet contacts the guide plate on one side, and the lower air outlet contacts the guide plate on the other side.

[0031] In this embodiment, as shown in the figure, the housing is provided with a first outlet flow channel 15 and a second outlet flow channel 16. One end of the first outlet flow channel is connected to the screw mounting hole and the other end is connected to the lower air outlet. One end of the second outlet flow channel is connected to the lower exhaust hole and the other end is connected to the middle air outlet and the lower air outlet. The first flow channel is arranged opposite the guide plate on one side, and the air flowing out of the guide plate enters the first flow channel. The second flow channel is arranged opposite the guide plate on the other side and is connected to the gas discharged from the middle air outlet. The upper end surface of the guide plate is covered by a terminal block 47 to prevent the gas from the middle air outlet from escaping to the first flow channel.

[0032] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0034] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be construed as limiting the present invention, but any improvements based on the spirit of the present invention should fall within the scope of protection of the present invention.

Claims

1. A multi-arc circuit breaker, comprising a housing, wherein a static contact, a moving contact, and an arc extinguishing chamber are disposed within the housing, wherein the moving contact and the static contact are disposed opposite each other, and an arc running channel is formed between the moving contact and the arc extinguishing chamber; characterized in that: Also includes A partition is provided in the arc running channel and divides the arc running channel into at least two flow channels provided along the thickness direction of the shell, and each of the flow channels is communicated with the arc extinguishing chamber.

2. The multi-arc circuit breaker according to claim 1, characterized in that: A second partition is provided in the arc extinguishing chamber, and the second partition divides the arc extinguishing chamber into at least two second flow channels, and the second flow channels are provided in a one-to-one correspondence with the first flow channels.

3. The multi-arc circuit breaker according to claim 1, characterized in that: There are at least two partitions, and the partitions are made of gas-generating material.

4. The multi-arc circuit breaker according to claim 1, characterized in that: A magnetizing plate is provided in the partition.

5. The multi-arc circuit breaker according to claim 1, characterized in that: An arc striking plate is further provided in the shell, a first mounting portion is provided on the static contact, a second mounting portion is provided on the arc striking plate, one end of the partition is detachably connected to the first mounting portion, and the other end is detachably connected to the second mounting portion.

6. The multi-arc circuit breaker according to claim 5, characterized in that: The first mounting portion is a mounting groove that penetrates the static contact.

7. The multi-arc circuit breaker according to claim 2, characterized in that: The second baffles include multiple groups arranged front to back along the air intake direction, and fusion areas are provided between horizontally adjacent second baffles.

8. A multi-arc circuit breaker according to any one of claims 1 to 7, characterized in that: An air outlet is provided on the outer wall of the arc extinguishing chamber, a screw mounting hole and a lower exhaust hole are provided on the shell, and a diverter is installed on the back of the arc extinguishing chamber. The diverter diverts the airflow discharged from the air outlet into at least two airflows and discharges them out of the shell through the screw mounting hole or the lower exhaust hole.

9. The multi-arc circuit breaker according to claim 8, characterized in that: The diverter includes a middle plate, and guide plates with curved surfaces are provided on both sides of the middle plate. A through groove is provided on the middle plate. The air outlet includes an upper air outlet, a middle air outlet and a lower air outlet. The middle air outlet is arranged opposite to the through groove, the upper air outlet is arranged opposite to the guide plate on one side, and the lower air outlet is arranged opposite to the guide plate on the other side.

10. The multi-arc circuit breaker according to claim 9, characterized in that: A first air outlet duct and a second air outlet duct are provided in the shell. One end of the first air outlet duct is connected to the screw mounting hole, and the other end is connected to the lower air outlet hole. One end of the second air outlet duct is connected to the lower exhaust hole, and the other end is connected to the middle air outlet hole and the lower air outlet hole.

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