A modular arc quenching system and circuit breaker

Abstract

The application provides a modular arc-extinguishing system and a circuit breaker, and belongs to the technical field of low-voltage electrical apparatuses. The modular arc-extinguishing system comprises an arc-extinguishing seat, which is sequentially integrated with an exhaust channel forming structure, an arc-extinguishing chamber and an arc-igniting assembly. The arc-extinguishing chamber and the exhaust channel forming structure are communicated. The arc-igniting assembly is used for introducing an electric arc into the arc-extinguishing chamber for arc-extinguishing and discharging the generated gas through the exhaust channel forming structure. The exhaust channel forming structure, the arc-extinguishing chamber and the arc-igniting assembly are integrated on the arc-extinguishing seat to form a modular arc-extinguishing system. The modular arc-extinguishing system is installed in the housing base of the circuit breaker through the arc-extinguishing seat to realize the modular installation of the arc-extinguishing system. When the circuit breaker is installed, the modular arc-extinguishing system as a whole facilitates the turnover of the assembly process, and can effectively improve the flexibility and production efficiency of the manufacturing and assembly of the circuit breaker.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and more specifically, to a modular arc-extinguishing system and circuit breaker. Background Technology

[0002] Circuit breakers generally consist of a contact system, an arc-extinguishing system, an operating mechanism, a trip unit, and a housing. The arc-extinguishing system's function is to reduce arc damage to the contacts and limit arc spread when the power supply voltage exceeds tens of volts and the breaking current exceeds tens of amperes. Measures to enhance arc-extinguishing capability are typically required, and the arc-extinguishing device, or arc-extinguishing system, is used for this purpose. An arc-extinguishing system generally includes an arc-extinguishing chamber, magnetic conductive sheet, arc-isolation plate, arc angle, adjusting screw assembly, and arc-extinguishing exhaust duct forming structure. However, in existing circuit breakers, these parts or components are all mounted on the circuit breaker's housing base. This places high demands on the product assembly process, and the individual assembly of each component results in poor turnover. Summary of the Invention

[0003] The purpose of this application is to provide a modular arc extinguishing system and circuit breaker, which enables modular installation of the arc extinguishing system, facilitates the turnover of assembly processes, and improves manufacturing flexibility.

[0004] The embodiments of this application are implemented as follows:

[0005] One aspect of this application provides a modular arc extinguishing system, which includes an arc extinguishing base. The arc extinguishing base is sequentially integrated with an exhaust duct forming structure, an arc extinguishing chamber, and an arc ignition assembly. The arc extinguishing chamber and the exhaust duct forming structure are connected. The arc ignition assembly introduces an electric arc into the arc extinguishing chamber for arc extinguishing, and the generated gas is discharged through the exhaust duct forming structure.

[0006] Optionally, an arc-extinguishing cavity is formed at the end of the arc-extinguishing seat away from the exhaust duct forming structure, the arc-extinguishing cavity having a first cavity opening, and the arc-extinguishing chamber being disposed within the arc-extinguishing cavity through the first cavity opening.

[0007] Optionally, the arc-starting assembly includes two arc-blocking plates disposed opposite to each other on the arc-extinguishing seat. Each arc-blocking plate has a cavity, and a magnetic plate is disposed within the cavity.

[0008] Optionally, the arc-extinguishing cavity further has a second cavity opening in the opposite direction to the first cavity opening, the cavity body is connected to the second cavity opening, and the arc-initiating assembly is disposed in the arc-extinguishing cavity through the second cavity opening.

[0009] Optionally, the exhaust duct forming structure is formed on the side wall of the arc extinguishing seat. A plurality of guide plates are provided on the side wall. One end of the plurality of guide plates is disposed on the side wall, and the other end extends toward the center of the side wall. The exhaust duct forming structure is formed between the end of the plurality of guide plates extending toward the center of the side wall and the guide plates.

[0010] Optionally, the plurality of guide plates include a plurality of first guide plates arranged perpendicular to the exhaust direction and at least one second guide plate arranged parallel to the exhaust direction. The plurality of first guide plates are arranged opposite to and staggered on both sides of the side wall of the arc extinguishing seat, and at least one second guide plate is arranged close to the arc extinguishing chamber. The gas generated in the arc extinguishing chamber is discharged sequentially through the exhaust channel forming structure formed by at least one second guide plate and the plurality of first guide plates.

[0011] Optionally, the arc-starting assembly further includes an arc-shaped plate disposed above the arc-extinguishing chamber along the direction of the second cavity opening, and a slot is formed on the arc-extinguishing seat, with one end of the arc-shaped plate disposed in the slot.

[0012] Optionally, the arc-shaped plate includes a first plate, a second plate, and a connecting plate connecting the first plate and the second plate. The first plate and the second plate extend in opposite directions and have a height difference. The second plate is disposed in the slot, and the first plate extends away from the arc-extinguishing chamber.

[0013] Optionally, the arc-extinguishing seat is provided with a boss, the boss having a U-shaped groove, and an adjusting screw for adjusting the position between the double metal plate and the operating mechanism is provided in the U-shaped groove. The end of the adjusting screw corresponds to a hole provided on the first plate. A rib is also formed on the opposite side of the slot on the arc-extinguishing seat. The first plate is located above the rib. The rib is used to support the first plate of the arc-angle plate when the adjusting screw is activated.

[0014] Another aspect of this application provides a circuit breaker, which includes a housing base, a contact system disposed within the housing base, and the aforementioned modular arc extinguishing system, wherein the arc ignition component of the modular arc extinguishing system corresponds to the moving contact system.

[0015] Optionally, the housing base is provided with a plurality of modular arc extinguishing systems, which are arranged side by side perpendicular to the exhaust direction.

[0016] The beneficial effects of the embodiments of this application include:

[0017] The modular arc-extinguishing system and circuit breaker provided in this application integrate an exhaust duct forming structure, an arc-extinguishing chamber, and an arc-ignition assembly on the arc-extinguishing base. The arc-extinguishing chamber and the exhaust duct forming structure are connected. The arc-ignition assembly introduces the electric arc generated between the moving and stationary contacts into the arc-extinguishing chamber. The electric arc is extinguished in the arc-extinguishing chamber, generating gas, which is then discharged through the arc-extinguishing chamber into the exhaust duct forming structure. By integrating the exhaust duct forming structure, the arc-extinguishing chamber, and the arc-ignition assembly onto the arc-extinguishing base, a modular arc-extinguishing system is formed. This modular arc-extinguishing system is then installed within the circuit breaker's housing base via the arc-extinguishing base, achieving modular installation of the arc-extinguishing system. During circuit breaker installation, the integrated modular arc-extinguishing system facilitates installation and assembly process turnover, effectively improving the flexibility and production efficiency of circuit breaker manufacturing and assembly.

[0018] The circuit breaker includes a housing base, a contact system housed within the housing base, and the aforementioned modular arc-extinguishing system. The arc-ignition assembly of the modular arc-extinguishing system corresponds to the moving contact system. The modular arc-extinguishing system is housed within the housing base, along with other circuit breaker components, such as the contact system, which includes moving and stationary contacts. The positions of the contact system and the arc-ignition assembly correspond. The electric arc generated by the moving and stationary contacts is introduced into the arc-extinguishing chamber via the arc-ignition assembly for arc extinguishing. The gas generated during arc extinguishing is discharged through the exhaust duct structure of the modular arc-extinguishing system. The modular arc-extinguishing system enables modular installation, facilitating the turnover of circuit breaker assembly processes and improving the flexibility and production efficiency of circuit breaker assembly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is one of the schematic diagrams of a modular arc extinguishing system provided in the embodiments of this application;

[0021] Figure 2 This is the second schematic diagram of the modular arc extinguishing system structure provided in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the arc corner plate structure of the modular arc extinguishing system provided in the embodiments of this application;

[0023] Figure 4 This is a partial structural diagram of the modular arc extinguishing system provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the circuit breaker structure provided in an embodiment of this application.

[0025] Icons: 100-Modular arc extinguishing system; 101-Arc extinguishing seat; 102-Exhaust duct forming structure; 1021-Guide plate; 1021a-First guide plate; 1021b-Second guide plate; 1022-Sloping wall; 103-Arc extinguishing chamber; 1031-First cavity opening; 1032-Second cavity opening; 1033-Third cavity opening; 104-Arc isolation plate; 105-Magnetic guide plate; 106-Curved corner plate; 1061-First flat plate; 1062-Second flat plate; 1063-Connecting plate; 1064-Hole; 107-Slot; 108-Adjusting screw; 109-Boss; 1091-U-shaped groove; 110-Rib; 200-Outer shell base; 201-Cavity; F-Exhaust direction. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the arc extinguishing system of a circuit breaker, the arc extinguishing chamber, magnetic sheet, arc isolation plate, arc angle, adjusting screw assembly, and arc extinguishing exhaust channel forming structure are generally installed on the circuit breaker housing base. This places high demands on the product's assembly process and results in poor component turnover.

[0030] To address the aforementioned issues, this application provides a modular arc extinguishing system 100, which enables modular installation of the arc extinguishing system, facilitating assembly process turnover and improving manufacturability flexibility.

[0031] Specifically, please refer to Figure 1This application provides a modular arc extinguishing system 100, including an arc extinguishing base 101. An exhaust duct forming structure 102, an arc extinguishing chamber 103, and an arc ignition assembly are sequentially integrated on the arc extinguishing base 101. The arc extinguishing chamber 103 and the exhaust duct forming structure 102 are connected. The arc ignition assembly introduces the electric arc into the arc extinguishing chamber 103 and discharges the generated gas through the exhaust duct forming structure 102.

[0032] This application integrates the exhaust duct forming structure 102, the arc extinguishing chamber 103, and the arc ignition assembly on the arc extinguishing base 101 to form a modular arc extinguishing system 100. The modular arc extinguishing system 100 is then installed as a whole into the circuit breaker housing base 200 through the arc extinguishing base 101, thereby realizing the modular installation of the arc extinguishing system.

[0033] For example, the arc-extinguishing seat 101, serving as the carrier for the integrated arc-extinguishing system, is an irregularly shaped structural component in this application. The arc-extinguishing seat 101 has one sidewall and two ends; the arc-extinguishing chamber 103 and the arc-igniting assembly are disposed at one end, and the exhaust duct forming structure 102 is disposed on the sidewall and extends to the other end; along the exhaust direction F of the exhaust duct forming structure 102, the end where the arc-extinguishing chamber 103 and the arc-igniting assembly are disposed is located before the front end of the exhaust duct forming structure 102, and the front end of the arc-extinguishing chamber 103 and the exhaust duct forming structure 102... The extended end of the exhaust duct forming structure 102 can be understood as the rear end of the exhaust duct forming structure 102. The electric arc generated between the moving contact and the stationary contact is introduced into the arc extinguishing chamber 103 through the arc ignition assembly located at the end of the arc extinguishing seat 101. The arc is extinguished in the arc extinguishing chamber 103, and the generated gas is discharged from the other end of the arc extinguishing seat 101 through the exhaust duct forming structure 102 which is connected to the arc extinguishing chamber 103. In other words, the gas enters the exhaust duct forming structure 102 from the front end of the exhaust duct forming structure 102 and is discharged from the rear end of the exhaust duct forming structure 102.

[0034] In summary, the modular arc-extinguishing system 100 provided in this application integrates an exhaust duct forming structure 102, an arc-extinguishing chamber 103, and an arc-ignition assembly on an arc-extinguishing base 101. The arc-extinguishing chamber 103 and the exhaust duct forming structure 102 are connected. The arc-ignition assembly introduces the electric arc generated between the moving and stationary contacts into the arc-extinguishing chamber 103. The arc is extinguished within the arc-extinguishing chamber 103, generating gas, which is then discharged through the arc-extinguishing chamber 103 into the exhaust duct forming structure 102. By integrating the exhaust duct forming structure 102, the arc-extinguishing chamber 103, and the arc-ignition assembly onto the arc-extinguishing base 101, a modular arc-extinguishing system 100 is formed. The modular arc-extinguishing system 100 is then installed within the circuit breaker's housing base 200 via the arc-extinguishing base 101, achieving modular installation of the arc-extinguishing system. This allows the modular arc-extinguishing system 100, as a whole, to facilitate assembly process turnover during circuit breaker installation, effectively improving the flexibility and production efficiency of circuit breaker manufacturing and assembly.

[0035] Furthermore, such as Figure 2 As shown, an arc-extinguishing cavity is formed at the end of the arc-extinguishing seat 101 away from the exhaust duct forming structure 102. The arc-extinguishing cavity has a first cavity opening 1031, and the arc-extinguishing chamber 103 is disposed in the arc-extinguishing cavity through the first cavity opening 1031.

[0036] In one possible implementation of this application, the exhaust duct forming structure 102 is located on the side wall of the arc extinguishing seat 101. The side wall is located between and connects the two ends of the arc extinguishing seat 101. The exhaust duct forming structure 102 extends to one end, and the other end is away from the exhaust duct forming structure 102. The end away from the exhaust duct forming structure 102 forms an arc extinguishing cavity. The arc extinguishing cavity is a semi-closed chamber with multiple openings that can communicate with the outside, including a first opening 1031. The arc extinguishing chamber 103 enters the arc extinguishing cavity through the first opening 1031 and is installed inside the arc extinguishing cavity.

[0037] For example, the first cavity 1031 is located at the bottom of the arc-extinguishing seat 101. The arc-extinguishing chamber 103 is embedded from the bottom of the arc-extinguishing cavity at the front end of the exhaust duct forming structure 102. The sidewall of the exhaust duct forming structure 102 is bent at the front end of the exhaust duct forming structure 102 to form an inclined wall 1022. This inclined wall 1022 is an inner wall of the arc-extinguishing cavity. The arc-extinguishing chamber 103 is located at the inclined wall 1022, forming a gap between it and the inclined wall 1022. This gap is the air vent, which connects the arc-extinguishing chamber 103 and the exhaust duct forming structure 102. Gas enters the front end of the exhaust duct forming structure 102 through the air vent and is then discharged through the exhaust duct forming structure 102. The inclined wall 1022 increases the space connecting the arc-extinguishing chamber 103 and the exhaust duct forming structure 102, allowing the generated gas to be discharged from the exhaust duct forming structure 102 in a timely manner, avoiding accumulation in the arc-extinguishing cavity.

[0038] The arc-starting assembly includes two arc-blocking plates 104 disposed opposite to each other on the arc-extinguishing seat 101. Each arc-blocking plate 104 has a cavity, and a magnetic plate 105 is disposed inside the cavity.

[0039] Two arc-blocking plates 104 are arranged opposite to each other, and a magnetic plate 105 is provided in the cavity of each arc-blocking plate 104. The magnetic field generated by the arc-blocking plate 104 and the magnetic plate 105 can introduce the electric arc generated by the moving contact and the stationary contact into the arc-extinguishing chamber 103.

[0040] The arc-extinguishing chamber has multiple openings connecting to the outside. Besides the first opening 1031 used for embedding into the arc-extinguishing chamber 103, it also includes a second opening 1032 and a third opening 1033. For example, the first opening 1031 is located at the bottom of the arc-extinguishing chamber, and the directions of the first opening 1031 and the third opening 1033 are perpendicular. Perpendicular direction means that the entry direction of the openings is perpendicular. For example... Figure 2The arc-extinguishing chamber 103 is inserted into the arc-extinguishing chamber from bottom to top through the first cavity 1031 at the bottom of the arc-extinguishing chamber. The third cavity 1033 is located on the right side of the arc-extinguishing chamber. The arc-blocking plate 104 and the magnetic plate 105 are located at the third cavity 1033. The front end of the arc-extinguishing chamber 103 faces the third cavity 1033. The electric arc generated by the moving contact and the stationary contact can be introduced into the arc-extinguishing chamber from the third cavity 1033 on the right side of the arc-extinguishing chamber to the left, and then enter the arc-extinguishing chamber 103 to extinguish the arc.

[0041] Furthermore, the arc-extinguishing cavity also has a second cavity 1032 in the opposite direction to the first cavity 1031. The cavity body is connected to the second cavity 1032, and the arc-extinguishing plate assembly formed by the arc-blocking plate 104 and the magnetic plate 105 is disposed in the arc-extinguishing cavity through the second cavity 1032.

[0042] The direction of the second cavity 1032 is opposite to the direction of the first cavity 1031. Figure 2 The intermediate arc-extinguishing chamber 103 is inserted into the arc-extinguishing chamber from bottom to top through the first cavity opening 1031 at the bottom of the arc-extinguishing chamber. Figure 1 The second cavity 1032 is located at the top of the arc-extinguishing cavity. After the arc-blocking plate 104 and the magnetic plate 105 are assembled, they are inserted into the arc-extinguishing cavity from top to bottom through the second cavity 1032 at the top of the arc-extinguishing cavity.

[0043] For the exhaust duct forming structure 102, the exhaust duct forming structure 102 is formed on the side wall of the arc extinguishing seat 101. A plurality of guide plates 1021 are provided on the side wall. One end of the plurality of guide plates 1021 is provided on the side wall and the other end extends toward the center of the side wall. The ends of the plurality of guide plates 1021 extending toward the center of the side wall are connected to form the exhaust duct forming structure 102.

[0044] Multiple guide plates 1021 on the sidewall form an exhaust duct forming structure 102. For example, one end of the guide plate 1021 is flush with the edge of the sidewall, and the other end of the guide plate 1021 extends toward the center of the sidewall. In this way, the end of the multiple guide plates 1021 extending toward the center of the sidewall forms an exhaust duct forming structure 102, and the gas generated by the arc extinguishing chamber 103 is discharged through the exhaust duct forming structure 102.

[0045] In one possible implementation of this application, the plurality of guide plates 1021 include a plurality of first guide plates 1021a arranged perpendicular to the exhaust direction F, and at least one second guide plate 1021b arranged parallel to the exhaust direction F. The plurality of first guide plates 1021a are arranged opposite to and staggered on both sides of the side wall of the arc extinguishing seat 101, and at least one second guide plate 1021b is arranged close to the arc extinguishing chamber 103. The gas generated in the arc extinguishing chamber 103 is discharged sequentially through the exhaust channel forming structure 102 formed by at least one second guide plate 1021b and the plurality of first guide plates 1021a.

[0046] Depending on their orientation, guide plates 1021 can be divided into first guide plates 1021a and second guide plates 1021b. First guide plates 1021a are positioned perpendicular to the exhaust direction F, while second guide plates 1021b are positioned parallel to the exhaust direction F. For example, there are four first guide plates 1021a and one second guide plate 1021b. The second guide plate 1021b is positioned at the front end of the exhaust duct forming structure 102 to guide the gas generated by the arc-extinguishing chamber 103 into the exhaust duct forming structure 102. The four first guide plates 1021a are positioned opposite each other and staggered on both sides of the sidewall. The ends of the first guide plates 1021a and second guide plates 1021b extend towards the center of the sidewall, forming the exhaust duct forming structure 1 between the end of the guide plate 1021 extending towards the center of the sidewall and the guide plate 1021. 02; The end of the guide plate 1021 extending towards the center of the side wall may or may not reach the center of the side wall, thus creating a meandering shape for the exhaust duct forming structure 102. This results in a curved path for the gas as it flows along the exhaust duct forming structure 102. Compared to a straight path, the pressure varies at different points along the curved exhaust path, accelerating the gas flow. Furthermore, the front end of the exhaust duct forming structure 102 is larger than the rear end, creating a structure with a large inlet and a small outlet. This allows a large amount of gas to rush in from the front end of the exhaust duct forming structure 102, compressing the gas within the exhaust duct forming structure 102 towards the rear end, causing the gas to be rapidly expelled from the exhaust duct forming structure 102, further increasing the exhaust velocity. The gas entering through the second guide plate 1021b at the front end of the exhaust duct forming structure 102 flows sequentially along the ends of the four first guide plates 1021a extending towards the center of the side wall, and is discharged from the rear end of the exhaust duct forming structure 102.

[0047] Figure 1 The diagram shows one path for the exhaust gas, which enters the exhaust duct forming structure 102 from above the second guide plate 1021b and flows along... Figure 1 The exhaust is directed in the direction indicated by the dotted arrow; the gas can also enter the exhaust channel forming structure 102 from below the second guide plate 1021b and be exhausted along the exhaust direction F.

[0048] Of course, the number of the first guide plate 1021a and the second guide plate 1021b is not limited to the above, and can be set according to specific requirements. This application does not make specific limitations in this regard.

[0049] On the other hand, the arc ignition assembly also includes an arc corner plate 106 disposed above the arc extinguishing chamber 103 along the direction of the second cavity 1032, and a slot 107 is formed on the arc extinguishing seat 101, with one end of the arc corner plate 106 disposed in the slot 107.

[0050] The arc-angle plate 106, as an arc-initiating component in addition to the arc-isolating plate 104 and the magnetic plate 105, also serves to initiate the arc. The arc-angle plate 106 is located above the arc-extinguishing chamber 103. The arc-extinguishing seat 101 has a slot 107, and one end of the arc-angle plate 106 is set in the slot 107. The arc-angle plate 106 generates a magnetic field, which enhances the magnetic field effect of the arc-extinguishing chamber. Together with the arc-isolating plate 104 and the magnetic plate 105, they work together to introduce the arc generated by the moving contact and the stationary contact into the arc-extinguishing chamber 103.

[0051] In addition, the arc-angle plate 106 also serves to support the double metal plate (not shown in the figure). The arc-angle plate 106 is used to weld the double metal plate, which serves as a support point for the double metal plate. A mounting block is provided on the arc-extinguishing seat 101 near the arc-angle plate 106. An adjusting screw 108 is provided on the mounting block. The adjusting screw 108 faces the arc-angle plate 106. When the adjusting screw 108 is turned, the adjusting screw 108 acts on the arc-angle plate 106, thereby driving the double metal plate to move, thereby changing the distance between the free end of the double metal plate and the operating mechanism, thereby achieving the function of adjusting the thermal tripping time. The specific principle of adjusting the thermal tripping time is the same as that of the prior art, and will not be described in detail here.

[0052] Further, please refer to Figure 3 The arc-angle plate 106 includes a first plate 1061, a second plate 1062, and a connecting plate 1063 connecting the first plate 1061 and the second plate 1062. The first plate 1061 and the second plate 1062 extend in opposite directions and have a height difference. The second plate 1062 is disposed in the slot 107. The first plate 1061 extends away from the arc-extinguishing chamber 103 and is connected to the double metal plate. An adjusting screw 108 is correspondingly disposed on the first plate 1061. By adjusting the screw 108, the first plate 1061 is acted upon, thereby driving the double metal plate to adjust the distance between the free end of the double metal plate and the operating mechanism to achieve the purpose of thermal tripping.

[0053] The second flat plate 1062 of the arc corner plate 106 is located above the arc extinguishing chamber 103, inside the slot 107, and has a gap with the arc extinguishing chamber 103. The arc corner plate 106 and the two arc-blocking plates 104 (with a magnetic plate 105 installed inside the cavity of the arc-blocking plate 104) form a triangular spatial structure to increase the arc-initiating effect.

[0054] The double metal plate 1061 is connected to the first plate 1061. The first plate 1061 of the arc-angle plate 106 extends upward to interact with the adjusting screw 108 above it for adjusting the thermal tripping time. For details, please refer to... Figure 4A boss 109 is provided on the first plate 1061 of the arc extinguishing seat 101. The boss 109 has a U-shaped groove 1091. The opening direction of the U-shaped groove 1091 is not limited and can be up, down, left, or right. For example, in this application, the opening of the U-shaped groove 1091 faces the direction of the exhaust channel forming structure 102. An adjusting screw 108 for adjusting the position between the double metal and the operating mechanism is provided in the U-shaped groove 1091. The end of the adjusting screw 108 is a spherical head, which corresponds to the hole 1064 provided on the first plate 1061. The movement direction of the adjusting screw 108 is towards the first plate 1061 of the arc corner plate 106. The spherical head of the adjusting screw 108 acts on the first plate 1061 through the hole 1064, driving the double metal to move and adjusting the position between the double metal and the operating mechanism.

[0055] In addition, a rib 110 is formed on the opposite side of the slot 107 on the arc extinguishing seat 101. The first plate 1061 is located above the rib 110. The rib 110 is used to support the first plate 1061 of the arc corner plate 106 when the adjusting screw 108 is activated.

[0056] Please refer to Figure 4 A raised rib 110 is formed on the arc extinguishing seat 101. One end of the raised rib 110 extends to the slot 107 and the other end extends toward the first plate 1061. The raised rib 110 protrudes in the middle. The first plate 1061 is located at the protrusion of the raised rib 110. When the adjusting screw 108 acts downward on the first plate 1061, the raised rib below the first plate 1061 can play a supporting role.

[0057] During installation of the modular arc-extinguishing system 100 provided in this application embodiment, the magnetic plate 105 is inserted from one end of the arc-extinguishing plate 104 into the internal cavity of the arc-extinguishing plate 104 to form an arc-extinguishing plate assembly. The assembled arc-extinguishing plate assembly is then inserted from the second cavity opening 1032 at the top of the arc-extinguishing chamber into the side walls of the arc-extinguishing chamber. The side walls of the arc-extinguishing chamber are provided with corresponding slots to engage the arc-extinguishing plate assembly. The arc-extinguishing chamber 103 is inserted from the first cavity opening 1031 at the bottom of the arc-extinguishing chamber. The front end of the arc-extinguishing chamber 103 corresponds to the arc-extinguishing plate assembly, and the rear end connects to the exhaust duct forming structure 1. The air duct of 02 (formed by inclined wall 1022) is formed by inserting the arc corner plate 106 into the slot 107 at the upper end of the arc-extinguishing chamber 103 from the right side, and the adjusting screw 108 into the boss 109 at the upper end of the arc-extinguishing chamber 103. In this way, the arc-extinguishing chamber 103, the arc corner plate 106, the adjusting screw 108, and the arc isolation plate assembly are integrated and installed on the arc-extinguishing seat 101 (the arc-extinguishing seat 101 forms the exhaust duct forming structure 102). Then, the modular arc-extinguishing system 100 is installed into the corresponding position of the circuit breaker housing base 200 to achieve modular installation.

[0058] On the other hand, this application also provides a circuit breaker, please refer to... Figure 5It includes a housing base 200, a contact system disposed within the housing base 200, and the aforementioned modular arc extinguishing system 100, wherein the arc ignition component of the modular arc extinguishing system 100 corresponds to the moving contact system.

[0059] A modular arc-extinguishing system 100 is installed within the housing base 200, along with other circuit breaker components, such as a contact system. The contact system includes moving and stationary contacts, and its position corresponds to that of the arc-ignition assembly. The electric arc generated by the moving and stationary contacts is introduced into the arc-extinguishing chamber 103 for extinguishing via the arc-ignition assembly. The gas generated during arc extinguishing is discharged through the exhaust duct forming structure 102 of the modular arc-extinguishing system 100. The modular arc-extinguishing system 100 enables modular installation, facilitating the turnover of circuit breaker assembly processes and improving the flexibility and production efficiency of circuit breaker assembly.

[0060] Furthermore, the outer casing base 200 is provided with multiple modular arc extinguishing systems 100, which are arranged side by side perpendicular to the exhaust direction F.

[0061] The circuit breaker may include multiple modular arc extinguishing systems 100, which are arranged side by side to extinguish arcs generated by the contact system.

[0062] For example, the circuit breaker provided in this application embodiment includes four modular arc extinguishing systems 100 arranged side by side. The housing base 200 forms four corresponding chambers 201. Each chamber 201 is equipped with one modular arc extinguishing system 100. Through the arrangement of the modular arc extinguishing systems 100, modular installation can be achieved. Multiple modular arc extinguishing systems 100 can be installed on the same housing base 200 to improve the overall assembly efficiency of the circuit breaker.

[0063] This circuit breaker has the same structure and beneficial effects as the modular arc extinguishing system 100 in the foregoing embodiments. The structure and beneficial effects of the modular arc extinguishing system 100 have been described in detail in the foregoing embodiments and will not be repeated here.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A modular arc extinguishing system (100), characterized in that, The system includes an arc-extinguishing base (101), on which an exhaust duct forming structure (102), an arc-extinguishing chamber (103), and an arc-igniting assembly are sequentially integrated. The arc-extinguishing chamber (103) and the exhaust duct forming structure (102) are connected. The arc is introduced into the arc-extinguishing chamber (103) to extinguish the arc through the arc-igniting assembly, and the generated gas is discharged through the exhaust duct forming structure (102). The exhaust duct forming structure (102) is formed on the side wall of the arc extinguishing seat (101). The side wall of the exhaust duct forming structure (102) is bent at the front end of the exhaust duct forming structure (102) to form an inclined wall (1022). The arc extinguishing chamber (103) is located at the inclined wall (1022) to form a gap with the inclined wall (1022). The gap is an air vent. The air vent connects the arc extinguishing chamber (103) and the exhaust duct forming structure (102). Gas enters the front end of the exhaust duct forming structure (102) through the air vent and is then discharged through the exhaust duct forming structure (102). The sidewall is provided with a plurality of guide plates (1021), one end of the plurality of guide plates (1021) is disposed on the sidewall and the other end extends toward the center of the sidewall, and the plurality of guide plates (1021) are between the end of the plurality of guide plates (1021) extending toward the center of the sidewall and the guide plates (1021) to form the exhaust duct forming structure (102). The arc-starting assembly also includes an arc-shaped plate (106) disposed above the arc-extinguishing chamber (103), and a slot (107) is formed on the arc-extinguishing seat (101), with one end of the arc-shaped plate (106) disposed in the slot (107); The arc-extinguishing seat (101) is provided with a boss (109), the boss (109) has a U-shaped groove (1091), and an adjusting screw (108) for adjusting the position between the double metal and the operating mechanism is provided in the U-shaped groove (1091).

2. The modular arc extinguishing system (100) according to claim 1, characterized in that, An arc-extinguishing cavity is formed at the end of the arc-extinguishing seat (101) away from the exhaust duct forming structure (102). The arc-extinguishing cavity has a first cavity opening (1031), and the arc-extinguishing chamber (103) is disposed in the arc-extinguishing cavity through the first cavity opening (1031).

3. The modular arc extinguishing system (100) according to claim 2, characterized in that, The arc-starting assembly includes two arc-blocking plates (104) disposed opposite to each other on the arc-extinguishing seat (101). The arc-blocking plate (104) has a cavity, and a magnetic plate (105) is disposed in the cavity.

4. The modular arc extinguishing system (100) according to claim 3, characterized in that, The arc-extinguishing cavity also has a second cavity (1032) in the opposite direction to the first cavity (1031). The cavity is connected to the second cavity (1032), and the arc-initiating assembly is disposed in the arc-extinguishing cavity through the second cavity (1032).

5. The modular arc extinguishing system (100) according to claim 1, characterized in that, The plurality of guide plates (1021) include a plurality of first guide plates (1021a) arranged perpendicular to the exhaust direction, and at least one second guide plate (1021b) arranged parallel to the exhaust direction. The plurality of first guide plates (1021a) are arranged opposite to each other and alternately on both sides of the side wall of the arc extinguishing seat (101). At least one second guide plate (1021b) is arranged close to the arc extinguishing chamber (103). The gas generated by the arc extinguishing chamber (103) is discharged sequentially through the exhaust channel forming structure (102) formed by at least one second guide plate (1021b) and the plurality of first guide plates (1021a).

6. The modular arc extinguishing system (100) according to claim 4, characterized in that, The arc-shaped plate (106) is arranged along the direction of the second cavity opening (1032).

7. The modular arc extinguishing system (100) according to claim 6, characterized in that, The arc-shaped plate (106) includes a first plate (1061), a second plate (1062), and a connecting plate (1063) connecting the first plate (1061) and the second plate (1062). The first plate (1061) and the second plate (1062) extend in opposite directions, and there is a height difference between the first plate (1061) and the second plate (1062). The second plate (1062) is disposed in the slot (107), and the first plate (1061) extends away from the arc-extinguishing chamber (103).

8. The modular arc extinguishing system (100) according to claim 7, characterized in that, The end of the adjusting screw (108) corresponds to the hole (1064) provided on the first plate (1061); A rib (110) is also formed on the opposite side of the slot (107) on the arc-extinguishing seat (101). The first plate (1061) is located above the rib (110). The rib (110) is used to support the first plate (1061) of the arc-angle plate (106) when the adjusting screw (108) is activated.

9. A circuit breaker, characterized in that, It includes a housing base (200), a contact system disposed within the housing base (200), and a modular arc extinguishing system (100) as described in any one of claims 1-8, wherein the arc ignition assembly of the modular arc extinguishing system (100) corresponds to the contact system.

10. The circuit breaker according to claim 9, characterized in that, The outer casing base (200) is provided with a plurality of modular arc extinguishing systems (100), which are arranged side by side perpendicular to the exhaust direction (F).

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