Arc extinguish chamber of universal circuit breaker

Abstract

The invention discloses an arc extinguish chamber of a universal circuit breaker, and the arc extinguish chamber comprises an arc chute assembly which is arranged at the lower part of the arc extinguish chamber; the deionization assembly is arranged at the upper part of the arc extinguish chamber; wherein the arc chute assembly and the deionization assembly are connected in a clamping manner to form a complete arc extinguish chamber. The arc extinguishing device has the beneficial effects that the arc extinguishing gate assembly and the deionization assembly are separately designed and are connected in a clamping manner, and the gas outlet channel is in an inverted horn shape, so that high-temperature and high-pressure gas entering the gate plate can be further compressed, an arc can quickly enter the gate plate, the arc is cut by the gate plate, and the arc extinguishing effect is improved. And the insulating part at the upper part of the arc extinguish chamber is additionally provided with a gas production material and a plurality of layers of springs in the cavity, so that the metal steam rushing out of the grid plate is further cooled and eliminated, the pressure of the arc extinguish chamber is released, and meanwhile, a relatively good filtering effect is formed on the gas sprayed out of the arc extinguish chamber, and the external insulation of the circuit breaker is prevented from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of universal circuit breakers, in particular to an arc extinguishing chamber of a universal circuit breaker. Background Art

[0002] Small current frame universal circuit breakers are widely used in low voltage power distribution systems in factories, residential areas and commercial centers. They have large current carrying capacity and comprehensive protection, and can be used directly as main switches in distribution circuits.

[0003] When a fault current appears in the system, the controller triggers the operating mechanism to drive the contacts to open quickly, generating an arc between the contacts. The moving contact, static contact and arc extinguishing chamber constitute a contact arc extinguishing system, which uses arc-starting plates, arc extinguishing grids and other components to transfer, split, cool and eliminate the arc, ultimately achieving the purpose of extinguishing the arc.

[0004] At present, the arc extinguishing chamber of the small current frame universal circuit breaker generally adopts a multi-grid riveted structure, which is riveted into a whole through the red steel paperboard or other insulating materials on both sides. The grids are relatively insulated but maintain a certain electrical gap. In order to make it easier for the arc to enter the grid, an asymmetric V-shaped structure is often used, and the positive and negative arrangements are performed. Finally, the overall structure after the grid is riveted is connected to the insulating parts of the outlet through screws; on the other hand, the free gas after the grid is cooled contains a large amount of metal vapor, and directly releasing it from the arc extinguishing chamber may have a serious impact on the external insulation of the circuit breaker. Therefore, it is necessary to further eliminate the metal free gas at the outlet of the arc extinguishing chamber. In the industry, engineers will use multi-layer perforated metal mesh plates at the outlet of the arc extinguishing chamber to further eliminate the metal vapor; in addition, in order to prevent the pressure in the arc extinguishing chamber from falling rapidly during disconnection, multi-layer metal rods are also stacked to form a certain damping when the outlet channel is eliminated. However, it is difficult for the above structure to obtain an optimal balance between smooth gas outlet, good metal vapor adsorption and channel damping, which often leads to breaking failure. Either the external insulation of the circuit breaker is broken down, or the arc extinguishing chamber cannot withstand the breaking impact and the arc extinguishing chamber collapses. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0007] Therefore, an object of the present invention is to provide an arc extinguishing chamber of a universal circuit breaker, which can quickly extinguish the arc and more effectively absorb the free metal gas rushing out of the grid.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: an arc extinguishing chamber of a universal circuit breaker, which includes an arc extinguishing grid assembly, which is arranged at the lower part of the arc extinguishing chamber; and an extinguishing assembly, which is arranged at the upper part of the arc extinguishing chamber; wherein the arc extinguishing grid assembly and the extinguishing assembly are connected by a snap-fit ​​manner to form a complete arc extinguishing chamber.

[0009] As a preferred solution of the arc extinguishing chamber of the universal circuit breaker of the present invention, the arc extinguishing grid assembly includes a plurality of groups of arc extinguishing grids, a left arc isolation wall and a right arc isolation wall arranged in parallel or at a certain angle, the arc extinguishing grids, the left arc isolation wall and the right arc isolation wall are arranged on both sides of the plurality of groups of arc extinguishing grids, and the left triangular insulating member and the right triangular insulating member are respectively arranged on the inner bottom of the left arc isolation wall and the right arc isolation wall.

[0010] As a preferred solution of the arc extinguishing chamber of the universal circuit breaker of the present invention, bosses are arranged on both sides of the arc extinguishing grid, a first hole matching with the boss is arranged on the left arc isolation wall, and a second hole matching with the boss is arranged on the right arc isolation wall. The arc extinguishing grid, the left arc isolation wall and the right arc isolation wall are fixed into a whole by matching the boss, the first hole and the second hole and riveting.

[0011] As a preferred solution of the arc extinguishing chamber of the universal circuit breaker of the present invention, the left triangular insulating member and the right triangular insulating member are respectively fixed to the left arc isolation wall and the right arc isolation wall by screw connection.

[0012] As a preferred solution of the arc extinguishing chamber of the universal circuit breaker of the present invention, the air flow channel of the arc extinguishing grid assembly presents an inverted trumpet-shaped structure from bottom to top, which is large at the bottom and small at the top, and the left triangular insulating part and the right triangular insulating part constitute the bottom of the inverted trumpet-shaped structure.

[0013] As a preferred solution of the arc extinguishing chamber of the universal circuit breaker of the present invention, the ion extinguishing assembly includes an insulating member, as the outermost structure, a metal mesh plate, a metal mesh plate arranged at the top of the inner part of the insulating member, a multi-layer stacked spring arranged below the metal mesh plate, and a gas production plate covering the multi-layer stacked spring and fixedly connected to the insulating member.

[0014] As a preferred solution of the arc extinguishing chamber of the universal circuit breaker of the present invention, a plurality of evenly distributed air outlet holes are arranged on the gas production plate, and the diameter of the air outlet holes is smaller than the wire diameter of the multi-layer stacked spring.

[0015] As a preferred solution of the arc extinguishing chamber of the universal circuit breaker of the present invention, the gas-generating plate is made of a gas-generating material, which can release gas that is beneficial to cooling the metal vapor when it contacts high-temperature and high-pressure metal vapor, and the gas-generating material is a thermally decomposable polymer material.

[0016] As a preferred solution of the arc extinguishing chamber of the universal circuit breaker of the present invention, a first snap hole is provided on the left arc isolation wall, a second snap hole is provided on the right arc isolation wall, a snap boss matching with the first snap hole and the second snap hole is provided on the insulating part, and the first snap hole and the second snap hole form a snap connection with the snap boss.

[0017] As a preferred solution for the arc extinguishing chamber of the universal circuit breaker of the present invention, a sealed connection is formed between the left arc isolation wall and the right arc isolation wall and the insulating part, an electrical gap is maintained between the arc extinguishing grids and they are arranged in an asymmetric V-shaped structure, a multi-layer stacked spring is formed by winding multiple metal wires in a spiral manner, and a gas-generating plate is fixedly connected to the insulating part by screws.

[0018] Beneficial effects of the present invention: The present invention adopts a structure in which the arc extinguishing grid component and the deionizing component are separately designed and connected by a snap-fitting manner. The upper and lower parts can be assembled separately and then snap-fitted together, with high assembly efficiency. The gas outlet channel structure is in an inverted trumpet shape, which is conducive to one-step compression of the high-temperature and high-pressure gas entering the grid, so that the arc quickly enters the grid and cuts the arc through the grid to achieve the effect of quickly extinguishing the arc. The insulating part on the upper part of the arc extinguishing chamber further cools and deionizes the metal vapor that rushes out of the grid by adding gas-producing materials and multi-layer springs in the cavity. While releasing the pressure in the arc extinguishing chamber, it also forms a better filtering effect on the gas ejected from the arc extinguishing chamber to prevent the insulation outside the circuit breaker from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 It is a schematic diagram of the overall structure of the arc extinguishing chamber of the universal circuit breaker.

[0021] Figure 2 The figure is a schematic diagram of the structure of the ion-extinguishing component of the arc extinguishing chamber of a universal circuit breaker.

[0022] Figure 3 The figure is a schematic diagram of the structure of the arc extinguishing grid assembly of the arc extinguishing chamber of the universal circuit breaker.

[0023] Figure 4This is a schematic diagram of the internal structure of the arc extinguishing component of the arc extinguishing chamber of a universal circuit breaker. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Example 1

[0028] Reference Figure 1 , which is the first embodiment of the present invention, and this embodiment provides an arc extinguishing chamber of a universal circuit breaker, which includes an arc extinguishing grid assembly 100 and an ion elimination assembly 200. The arc extinguishing grid pieces in the arc extinguishing grid assembly 100 can effectively cut and disperse the arc, increase the arc length, improve the resistance, and accelerate the arc extinction. The arc extinguishing grid pieces absorb part of the arc heat, reduce the arc temperature, and help to quickly extinguish the arc. The special structure of the arc extinguishing grid assembly 100 can guide the high-temperature ionized gas to flow upward and enter the ion elimination assembly 200. The structural design in the ion elimination assembly 200 can quickly cool the high-temperature gas rising from the arc extinguishing grid assembly 100. Through special materials and structural design, the ion elimination assembly 200 can effectively absorb the metal vapor generated by the arc to prevent it from leaking. The ion elimination assembly 200 controls the gas discharge speed and direction, and safely releases the cooled gas while maintaining an appropriate internal pressure. Through an effective ion elimination process, the potential damage of the exhaust gas to the external insulation of the circuit breaker is reduced.

[0029] Specifically, the arc extinguishing grid assembly 100 is disposed at the lower part of the arc extinguishing chamber;

[0030] The ion elimination component 200 is arranged at the upper part of the arc extinguishing chamber;

[0031] The arc extinguishing grid assembly 100 and the deionization extinguishing assembly 200 are connected by snap-fitting to form a complete arc extinguishing chamber.

[0032] In summary, by adopting a structure in which the arc extinguishing grid component and the deionizing component are separately designed and connected by a snap-on method, the upper and lower parts can be assembled separately and then snap-fitted together, with high assembly efficiency. The gas outlet channel structure is in an inverted trumpet shape, which is conducive to one-step compression of the high-temperature and high-pressure gas entering the grid, so that the arc quickly enters the grid, and the arc is cut by the grid to achieve the effect of quickly extinguishing the arc. The insulating part on the upper part of the arc extinguishing chamber further cools and deionizes the metal vapor rushing out of the grid by adding gas-producing materials and multi-layer springs in the cavity, while releasing the pressure in the arc extinguishing chamber, it also forms a good filtering effect on the gas ejected from the arc extinguishing chamber, thereby preventing the insulation outside the circuit breaker from being damaged.

[0033] Example 2

[0034] Reference Figures 1 to 4 , which is the second embodiment of the present invention, and this embodiment provides an arc extinguishing chamber of a universal circuit breaker, which includes an arc extinguishing grid assembly 100 and an ion elimination assembly 200. The arc extinguishing grid pieces in the arc extinguishing grid assembly 100 can effectively cut and disperse the arc, increase the arc length, improve the resistance, and accelerate the arc extinction. The arc extinguishing grid pieces absorb part of the arc heat, reduce the arc temperature, and help to quickly extinguish the arc. The special structure of the arc extinguishing grid assembly 100 can guide the high-temperature ionized gas to flow upward and enter the ion elimination assembly 200. The structural design in the ion elimination assembly 200 can quickly cool the high-temperature gas rising from the arc extinguishing grid assembly 100. Through special materials and structural design, the ion elimination assembly 200 can effectively absorb the metal vapor generated by the arc to prevent it from leaking. The ion elimination assembly 200 controls the gas discharge speed and direction, and safely releases the cooled gas while maintaining an appropriate internal pressure. Through an effective ion elimination process, the potential damage of the exhaust gas to the external insulation of the circuit breaker is reduced.

[0035] Specifically, the arc extinguishing grid assembly 100 is disposed at the lower part of the arc extinguishing chamber;

[0036] The ion elimination component 200 is arranged at the upper part of the arc extinguishing chamber;

[0037] The arc extinguishing grid assembly 100 and the deionization extinguishing assembly 200 are connected by snap-fitting to form a complete arc extinguishing chamber.

[0038] Furthermore, the arc extinguishing grid assembly 100 includes a plurality of groups of arc extinguishing grids 101, a left arc isolation wall 102 and a right arc isolation wall 103 arranged in parallel or at a certain angle, the arc extinguishing grids 101, the left arc isolation wall 102 and the right arc isolation wall 103 are arranged on both sides of the plurality of groups of arc extinguishing grids 101, and the left triangular insulating member 104 and the right triangular insulating member 105 are respectively arranged on the inner bottom of the left arc isolation wall 102 and the right arc isolation wall 103.

[0039] Furthermore, bosses are provided on both sides of the arc extinguishing grid 101, the left arc isolation wall 102 is provided with a first hole matching with the boss, and the right arc isolation wall 103 is provided with a second hole matching with the boss. The arc extinguishing grid 101, the left arc isolation wall 102 and the right arc isolation wall 103 are fixed into a whole by the boss, the first hole and the second hole and riveting.

[0040] Furthermore, the left triangular insulating member 104 and the right triangular insulating member 105 are respectively fixed to the left arc-isolating wall 102 and the right arc-isolating wall 103 by means of screw connections.

[0041] Furthermore, the airflow channel of the arc extinguishing grid assembly 100 presents an inverted trumpet-shaped structure from bottom to top, which is larger at the bottom and smaller at the top. The left triangular insulating member 104 and the right triangular insulating member 105 constitute the bottom of the inverted trumpet-shaped structure.

[0042] Furthermore, the deionization component 200 includes an insulating member 201 as the outermost structure, a metal mesh plate 202, a metal mesh plate 202 arranged at the top end inside the insulating member 201, a multi-layer stacked spring 203 arranged below the metal mesh plate 202, and a gas production plate 204 covering the multi-layer stacked spring 203 and fixedly connected to the insulating member 201.

[0043] Furthermore, the gas production plate 204 is provided with a plurality of evenly distributed gas outlet holes 204 a , and the diameter of the gas outlet holes 204 a is smaller than the wire diameter of the multi-layer stacked spring 203 .

[0044] Preferably, the arc extinguishing grid assembly 100 and the deionization assembly 200 can be assembled separately and then connected together by snap-fitting to form a complete arc extinguishing chamber, thereby improving assembly efficiency. The inverted trumpet-shaped airflow channel design of the arc extinguishing grid assembly 100 is conducive to compressing the high-temperature and high-pressure gas entering the grid, so that the arc quickly enters the grid and achieves the effect of quickly extinguishing the arc. The combined design of the multi-layer stacked spring 203 and the gas production plate 204 in the deionization assembly 200 can effectively cool and deionize the metal vapor rushing out of the grid, while ensuring the smooth passage of the gas.

[0045] Furthermore, the gas generating plate 204 is made of a gas generating material, which can release gas that is beneficial to cooling the metal vapor when it contacts the high-temperature and high-pressure metal vapor, and the gas generating material is a thermal decomposition type polymer material.

[0046] Furthermore, a first snap hole 102b is provided on the left arc isolation wall 102, a second snap hole 103b is provided on the right arc isolation wall 103, and a snap boss 201a that cooperates with both the first snap hole 102b and the second snap hole 103b is provided on the insulating member 201, and the first snap hole 102b and the second snap hole 103b form a snap connection with the snap boss 201a.

[0047] Furthermore, a sealed connection is formed between the left arc isolation wall 102 and the right arc isolation wall 103 and the insulating part 201, an electrical gap is maintained between the arc extinguishing grids 101 and they are arranged in an asymmetric V-shaped structure, the multi-layer stacked spring 203 is formed by multiple metal wires wound in a spiral manner, and the gas production plate 204 is fixedly connected to the insulating part 201 by screws.

[0048] It should be noted that appropriate electrical gaps should be maintained between the arc extinguishing grids 101, and they should be arranged in an asymmetric V-shaped structure to facilitate cutting and extinguishing of the arc. The diameter of the air outlet 204a on the gas production plate 204 should be smaller than the wire diameter of the multi-layer stacked spring 203 to ensure that the metal vapor can fully contact the gas production material. The gas production plate 204 is made of thermal decomposition type polymer material, which can release gas that is beneficial to cooling the metal vapor when it contacts high temperature and high pressure metal vapor. During the installation process, it should be ensured that a sealed connection is formed between the left arc isolation wall 102 and the right arc isolation wall 103 and the insulating part 201 of the ion elimination assembly 200 to prevent metal vapor leakage.

[0049] When in use, the arc extinguishing grid assembly 100 is assembled, and the arc extinguishing grid pieces 101 are arranged in an asymmetric V-shaped structure, and the bosses on both sides correspond to the first hole on the left arc isolation wall 102 and the second hole on the right arc isolation wall 103. The arc extinguishing grid pieces 101, the left arc isolation wall 102 and the right arc isolation wall (103) are fixed into a whole by riveting. The left triangular insulating piece 104 and the right triangular insulating piece 105 are fixed to the inner bottom of the left arc isolation wall 102 and the right arc isolation wall 103 respectively by screws.

[0050] To assemble the deionization assembly 200, place the metal mesh plate 202 on the top of the insulating member (201), and place the multi-layer stacked springs 203 below the metal mesh plate 202. Cover the multi-layer stacked springs 203 with the gas production plate 204, and fix it to the insulating member 201 with screws.

[0051] To assemble the arc extinguishing chamber, align the first snap hole 102b on the left arc-isolating wall 102 and the second snap hole 103b on the right arc-isolating wall 103 of the arc-extinguishing grid assembly 100 with the snap boss 201a on the insulating member 201 of the quenching assembly 200. Press the two assemblies together so that the snap holes and snap bosses are fully engaged to form a firm connection. Ensure that a sealed connection is formed between the left arc-isolating wall 102 and the right arc-isolating wall 103 and the insulating member 201 to prevent metal vapor leakage.

[0052] Install the assembled arc extinguishing chamber at the designated position of the circuit breaker. When the circuit breaker is working normally, the arc extinguishing chamber is in standby state. When a short circuit or overload occurs, the contacts of the circuit breaker separate and an arc is generated. The arc enters the arc extinguishing grid assembly 100 and is cut and cooled by the arc extinguishing grid 101. The high-temperature and high-pressure metal vapor passes through the electrical gap of the arc extinguishing grid 101, the outlet holes 204a of the gas production plate 204, the winding gap of the multi-layer stacked spring 203 and the mesh of the metal mesh plate 202 in sequence. In this process, the metal vapor is gradually cooled, filtered and deionized. The gas production plate 204 releases gas that is conducive to cooling the metal vapor, further promoting the deionization process. Finally, the harmless gas is discharged from the top of the arc extinguishing chamber, completing the arc extinguishing process.

[0053] Check the appearance of the arc extinguishing chamber regularly to ensure that there is no obvious damage or deformation. Check whether the snap-in connection is firm and re-secure it if necessary. If the arc extinguishing grid 101 is found to be severely ablated or deformed, the entire arc extinguishing chamber should be replaced in time.

[0054] In summary, by adopting a structure in which the arc extinguishing grid component and the deionizing component are separately designed and connected by a snap-on method, the upper and lower parts can be assembled separately and then snap-fitted together, with high assembly efficiency. The gas outlet channel structure is in an inverted trumpet shape, which is conducive to one-step compression of the high-temperature and high-pressure gas entering the grid, so that the arc quickly enters the grid, and the arc is cut by the grid to achieve the effect of quickly extinguishing the arc. The insulating part on the upper part of the arc extinguishing chamber further cools and deionizes the metal vapor rushing out of the grid by adding gas-producing materials and multi-layer springs in the cavity, while releasing the pressure in the arc extinguishing chamber, it also forms a good filtering effect on the gas ejected from the arc extinguishing chamber, thereby preventing the insulation outside the circuit breaker from being damaged.

[0055] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0056] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0057] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An arc extinguishing chamber of a universal circuit breaker, characterized in that: include, An arc extinguishing grid assembly (100) is arranged at the lower part of the arc extinguishing chamber; An ion elimination component (200) is arranged at the upper part of the arc extinguishing chamber; The arc extinguishing grid assembly (100) and the deionization assembly (200) are connected by snap-fitting to form a complete arc extinguishing chamber.

2. The arc extinguishing chamber of the universal circuit breaker according to claim 1, characterized in that: The arc extinguishing grid assembly (100) comprises a plurality of groups of arc extinguishing grid pieces (101), a left arc isolation wall (102) and a right arc isolation wall (103) arranged in parallel or at a certain angle; the arc extinguishing grid pieces (101), the left arc isolation wall (102) and the right arc isolation wall (103) are arranged on both sides of the plurality of groups of arc extinguishing grid pieces (101); and a left triangular insulating member (104) and a right triangular insulating member (105) are respectively arranged on the inner bottom of the left arc isolation wall (102) and the right arc isolation wall (103).

3. The arc extinguishing chamber of the universal circuit breaker according to claim 2, characterized in that: Bosses are arranged on both sides of the arc extinguishing grid (101), the left arc isolation wall (102) is provided with a first hole matched with the boss, and the right arc isolation wall (103) is provided with a second hole matched with the boss; the arc extinguishing grid (101), the left arc isolation wall (102) and the right arc isolation wall (103) are fixed into a whole by the matching of the boss, the first hole and the second hole and riveting.

4. The arc extinguishing chamber of the universal circuit breaker according to claim 3, characterized in that: The left triangular insulating member (104) and the right triangular insulating member (105) are respectively fixed to the left arc-isolating wall (102) and the right arc-isolating wall (103) by means of screw connection.

5. The arc extinguishing chamber of the universal circuit breaker according to claim 4, characterized in that: The airflow channel of the arc extinguishing grid assembly (100) presents an inverted trumpet-shaped structure from bottom to top, which is larger at the bottom and smaller at the top. The left triangular insulating member (104) and the right triangular insulating member (105) form the bottom of the inverted trumpet-shaped structure.

6. The arc extinguishing chamber of the universal circuit breaker according to claim 5, characterized in that: The deionization component (200) includes an insulating member (201) as the outermost structure, a metal mesh plate (202), the metal mesh plate (202) arranged at the top end inside the insulating member (201), a multi-layer stacked spring (203) arranged below the metal mesh plate (202), and a gas production plate (204) covering the multi-layer stacked spring (203) and fixedly connected to the insulating member (201).

7. The arc extinguishing chamber of the universal circuit breaker according to claim 6, characterized in that: The gas production plate (204) is provided with a plurality of evenly distributed gas outlet holes (204a), and the diameter of the gas outlet holes (204a) is smaller than the wire diameter of the multi-layer stacked spring (203).

8. The arc extinguishing chamber of the universal circuit breaker according to claim 7, characterized in that: The gas generating plate (204) is made of a gas generating material and can release gas that is beneficial to cooling the metal vapor when in contact with high-temperature and high-pressure metal vapor. The gas generating material is a thermal decomposition type polymer material.

9. The arc extinguishing chamber of the universal circuit breaker according to claim 8, characterized in that: The left arc isolation wall (102) is provided with a first snap hole (102b), the right arc isolation wall (103) is provided with a second snap hole (103b), the insulating component (201) is provided with a snap boss (201a) that cooperates with both the first snap hole (102b) and the second snap hole (103b), and the first snap hole (102b) and the second snap hole (103b) form a snap connection with the snap boss (201a).

10. The arc extinguishing chamber of the universal circuit breaker according to claim 9, characterized in that: A sealed connection is formed between the left arc isolation wall (102) and the right arc isolation wall (103) and the insulating member (201); an electrical gap is maintained between the arc extinguishing grids (101) and they are arranged in an asymmetric V-shaped structure; the multi-layer stacked spring (203) is formed by a plurality of metal wires wound in a spiral manner; and the gas production plate (204) is fixedly connected to the insulating member (201) by means of screws.

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