Arc extinguish chamber for circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to an arc extinguish chamber for a circuit breaker. Comprising a left base, a right base, an arc extinguishing grid sheet group, a first arc extinguishing pressing sheet, a second arc extinguishing pressing sheet, an arc extinguishing plate, a gas generating sheet, a cover plate and an arc striking sheet, the left base and the right base are symmetrically distributed and fixedly connected through threads; the arc-extinguishing grid sheet group is provided with a plurality of arc-extinguishing grid sheets which are arranged in parallel, the right base is provided with square through holes, and the arc-extinguishing grid sheets are inserted into the left base through the square through holes; the cover plate is fixed to the right base through threaded connection. Symmetrical grooves are formed in two sides of the left base and the right base; the first arc extinguishing pressing sheet, the second arc extinguishing pressing sheet and the arc extinguishing plate are inserted into the symmetrical grooves; and the gas production sheets are symmetrically distributed and clamped on the inner sides of the left base and the right base, so that the arc extinguish chamber can be quickly assembled and is convenient to maintain, repair and adjust, the production cost is lower, and the arc extinguish capability is more excellent.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circuit breaker especially relates to a circuit breaker is with arc extinguishing chamber. BACKGROUND

[0002] The circuit breaker is the automatic switch with bigger make and break capacity, and generally comprises a circuit breaker shell, a plurality of matched contact mechanisms and arc extinguishing chamber modules arranged in the circuit breaker shell, that is, one contact mechanism matches one arc extinguishing chamber module, and the arc extinguishing chamber module is used for leading and extinguishing the arc generated by the opening and closing of the contact mechanism. The plurality of arc extinguishing chamber modules are generally inserted side by side into the arc extinguishing chamber installation opening of the circuit breaker shell.

[0003] During the action process of the circuit breaker with load breaking, the voltage between the contacts causes air medium discharge to form arc. Therefore, the arc extinguishing chamber is generally arranged in the switch such as the circuit breaker and the contactor to extinguish the arc, so as to ensure the safe operation of the electrical equipment.

[0004] The traditional arc extinguishing chamber not only has a complex structure, but also has a tedious and time-consuming assembly process, which is laborious. The production cost is high, the arc extinguishing capacity is limited due to the space limitation of the arc extinguishing chamber, and the assembly gap between the components also affects the arc extinguishing effect. UTILITY MODEL CONTENTS

[0005] The utility model aims at the defects in the prior art to provide a circuit breaker arc extinguishing chamber, which can be quickly assembled, is convenient to maintain, repair and adjust, has lower production cost and excellent arc extinguishing capacity.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme of a circuit breaker arc extinguishing chamber, which comprises a left base, a right base, an arc extinguishing grid piece group, a first arc extinguishing pressing piece, a second arc extinguishing pressing piece, an arc extinguishing plate, a gas generating piece, a cover plate and an arc leading piece. The left base and the right base are symmetrically arranged and fixed by screw connection. The arc extinguishing grid piece group is provided with a plurality of arc extinguishing grid pieces arranged side by side. The right base is provided with a square through hole, and the arc extinguishing grid piece is inserted into the left base through the square through hole. The cover plate is fixed on the right base by screw connection. The left base and the right base are provided with symmetric grooves on both sides, and the first arc extinguishing pressing piece, the second arc extinguishing pressing piece and the arc extinguishing plate are inserted into the symmetric grooves. The gas generating piece is symmetrically clamped on the inner side of the left base and the right base.

[0007] Further, the left base is provided with a first groove, a second groove and a third groove. The first groove is matched with the first arc extinguishing pressing piece and clamped in the groove, the second groove is matched with the second arc extinguishing pressing piece and clamped in the groove, and the third groove is matched with the arc extinguishing plate and clamped in the groove.

[0008] Further, a row of fourth grooves is arranged on the left base for placing the arc extinguishing fin group, and the arc extinguishing fins of the arc extinguishing fin group are closely arranged and inserted into the fourth grooves.

[0009] Further, a through hole and a clamping groove are arranged on the left base, the clamping groove is used for clamping the gas production fin, the through hole is used for matching the left base and the right base for threaded fixing, a boss is further arranged for limiting installation with the right base, and an arc leading fin placing groove is further arranged for placing the arc leading fin.

[0010] Further, the right base is arranged with a right base first groove, a right base second groove and a right base third groove in symmetry with the left base, the right base first groove is matched with the first arc extinguishing fin and clamped in the groove, the right base second groove is matched with the second arc extinguishing fin and clamped in the groove, and the right base third groove is matched with the arc extinguishing plate and clamped in the groove, a row of square through holes arranged on the right base are used for inserting a plurality of arc extinguishing fins of the arc extinguishing fin group into the fourth grooves from the side, a right base through hole is further arranged on the right base for matching the left base and the right base for threaded connection and fixing, a right base clamping groove is further arranged for clamping the gas production fin, a cover plate mounting groove is further arranged for matching and mounting the cover plate, four threaded inserts are further arranged for matching the cover plate for fixing, a right base fourth groove and a right base fifth groove are further arranged, the right base fourth groove is matched with the clamping groove, the right base fifth groove is matched with the boss for limiting, and a right base sixth groove is used for placing the arc leading fin.

[0011] Further, a plurality of arc extinguishing fins of the arc extinguishing fin group are in a concave structure, and bosses are arranged on both sides and matched with the fourth grooves.

[0012] Further, the gas production fin is arranged with a plurality of protrusions, the protrusions are evenly distributed between the arc extinguishing fins after being inserted, a buckle is further arranged, the buckle is matched with the clamping groove and the right base clamping groove, and the gas production fin is arranged in symmetry and clamped on the left base and the right base.

[0013] Further, a counterbore is arranged on the cover plate, the counterbore is matched with the threaded insert and fixed by threaded connection.

[0014] By including left base, right base, arc extinguishing grid group, first arc extinguishing pressing piece, second arc extinguishing pressing piece, arc extinguishing plate, gas production piece, cover plate, arc leading piece, the left base and the right base are symmetrically arranged and fixed by thread connection, the arc extinguishing grid group is provided with a plurality of arc extinguishing grids and is arranged in parallel, the right base is provided with a square through hole, the arc extinguishing grid is inserted on the left base through the square through hole, the cover plate is fixed on the right base by thread connection, the left base and the right base are provided with symmetric grooves on both sides, the first arc extinguishing pressing piece, the second arc extinguishing pressing piece and the arc extinguishing plate are inserted in the symmetric grooves, and the gas production piece is clamped in the inside of the left base and the right base in a symmetric distribution structure, so that the arc extinguishing chamber can be quickly assembled, maintenance, repair and adjustment are facilitated, production cost is lower, and the arc extinguishing capacity is more excellent. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 It is a schematic diagram of the arc extinguishing chamber structure of the circuit breaker of the present application.

[0017] Figure 2 It is another view schematic diagram of the arc extinguishing chamber structure of the circuit breaker of the present application.

[0018] Figure 3 It is a left base schematic diagram of the arc extinguishing chamber of the circuit breaker of the present application.

[0019] Figure 4 It is a right base schematic diagram of the arc extinguishing chamber of the circuit breaker of the present application.

[0020] Figure 5 It is an arc extinguishing grid schematic diagram of the arc extinguishing chamber of the circuit breaker of the present application.

[0021] Figure 6 It is a gas production piece schematic diagram of the arc extinguishing chamber of the circuit breaker of the present application.

[0022] Figure 7 It is a cover plate schematic diagram of the arc extinguishing chamber of the circuit breaker of the present application.

[0023] Figure 8 It is another view schematic diagram of the right base of the arc extinguishing chamber of the circuit breaker of the present application.

[0024] REFERENCE NUMERALS:

[0025] Left base 1, first groove 1-1, second groove 1-2, third groove 1-3, fourth groove 1-4, through hole 1-5, clamping groove 1-6, boss 1-7, arc starting piece placing groove 1-8, right base 2, right base first groove 2-1, right base second groove 2-2, right base third groove 2-3, square through hole 2-4, right base through hole 2-5, right base clamping groove 2-6, cover plate mounting groove 2-7, threaded insert 2-8, right base fourth groove 2-9, right base fifth groove 2-10, right base sixth groove 2-11, arc extinguishing grid group 3, arc extinguishing grid 3-1, protruding block 3-2, first arc extinguishing pressing piece 4, second arc extinguishing pressing piece 5, arc extinguishing plate 6, gas generating piece 7, protrusion 7-1, buckle 7-2, cover plate 8, counterbore 8-1, arc starting piece 9. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0027] In the description of the utility model, it should be noted that the orientation or position relationship indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0028] An arc extinguishing chamber for circuit breaker, as shown in Figure 1 , 2 The utility model discloses an arc extinguishing chamber for circuit breaker, which comprises a left base 1, a right base 2, an arc extinguishing grid group 3, a first arc extinguishing pressing piece 4, a second arc extinguishing pressing piece 5, an arc extinguishing plate 6, a gas generating piece 7, a cover plate 8 and an arc starting piece 9. The left base 1 and the right base 2 are symmetrically arranged and fixed by screw connection. The arc extinguishing grid group 3 is provided with a plurality of arc extinguishing grids 3-1 arranged in parallel. The right base 2 is provided with a square through hole 2-4, and the arc extinguishing grids 3-1 are inserted into the left base 1 through the square through hole 2-4. The cover plate 8 is fixed to the right base 2 by screw connection. The left base 1 and the right base 2 are provided with symmetric grooves on both sides, and the first arc extinguishing pressing piece 4, the second arc extinguishing pressing piece 5 and the arc extinguishing plate 6 are inserted into the symmetric grooves. The gas generating piece 7 is symmetrically clamped on the inner sides of the left base 1 and the right base 2.

[0029] Specifically, through the symmetrical distribution and threaded connection and fixation of the left base 1 and the right base 2, not only the structural stability of the arc extinguishing chamber is improved, but also the assembly process is more convenient and standardized, and the assembly difficulty and cost are reduced. The arc extinguishing grid group 3 is inserted into the left base through the square through hole 2-4 on the right base 2, so that the installation and replacement of the arc extinguishing grid 3-1 become more convenient, and the arc extinguishing efficiency is also improved. The arrangement of the arc extinguishing grid 3-1 can be more flexible and compact. The cover plate 8 is fixed to the right base by threaded connection, which not only enhances the sealing performance of the arc extinguishing chamber to prevent external air or impurities from entering, but also makes the disassembly and maintenance of the cover plate more convenient. The first arc extinguishing pressing piece 4, the second arc extinguishing pressing piece 5 and the arc extinguishing plate 6 are inserted into the symmetrical grooves on both sides of the left and right bases. This design simplifies the assembly process and ensures the stability and position accuracy of these key components, which helps to improve the arc extinguishing effect. The gas production piece 7 is symmetrically distributed and clamped on the inner side of the left and right bases, which not only improves the stability of the gas production piece, but also helps to uniformly distribute the arc extinguishing gas, thereby improving the arc extinguishing efficiency. The overall structure is simplified and optimized, reducing the number of components and assembly steps, thereby reducing the production cost. At the same time, the cooperation between the components is close and reasonable, which improves the overall performance and reliability of the arc extinguishing chamber. The optimized design and layout of the arc extinguishing grid group 3, the gas production piece 7 and other related components significantly improve the arc extinguishing ability of the arc extinguishing chamber, which not only helps to ensure the safe operation of electrical equipment, but also prolongs the service life of the equipment.

[0030] As a preferred embodiment of the above-mentioned embodiment, as shown in Figure 3 The left base 1 is provided with a first groove 1-1, a second groove 1-2 and a third groove 1-3. The first groove 1-1 is matched with the first arc extinguishing pressing piece 4 and clamped in the groove. The second groove 1-2 is matched with the second arc extinguishing pressing piece 5 and clamped in the groove. The third groove 1-3 is matched with the arc extinguishing plate 6 and clamped in the groove.

[0031] Specifically, by arranging the first groove 1-1, the second groove 1-2 and the third groove 1-3 on the left base 1, the first arc-extinguishing pressure plate 4, the second arc-extinguishing pressure plate 5 and the arc-extinguishing plate 6 can be accurately positioned at the predetermined positions during installation, which not only simplifies the assembly process but also improves the assembly accuracy, ensures the relative position accuracy between the components, and enhances the overall structural stability of the arc-extinguishing chamber through the clamping connection between the first groove 1-1, the second groove 1-2, the third groove 1-3 and the corresponding components, so that the components can share the pressure together when stressed, thereby improving the anti-deformation ability and service life of the arc-extinguishing chamber. The clamping design of the grooves and the components allows the first arc-extinguishing pressure plate 4, the second arc-extinguishing pressure plate 5 and the arc-extinguishing plate 6 to be easily removed from the grooves when maintenance or replacement is required, without the need to disassemble the entire arc-extinguishing chamber. This design reduces maintenance costs and improves the maintainability of the system. By reasonably arranging the first groove 1-1, the second groove 1-2 and the third groove 1-3 on the left base 1, the spatial layout inside the arc-extinguishing chamber can be optimized, which not only saves space but also makes the cooperation between the components more compact and reasonable, thereby helping to improve the arc-extinguishing efficiency. The accurate positioning and fixation of the first arc-extinguishing pressure plate 4, the second arc-extinguishing pressure plate 5 and the arc-extinguishing plate 6 in the grooves help to ensure their stability and reliability during the arc-extinguishing process, which can more effectively guide the arc into the arc-extinguishing chamber and accelerate the arc-extinguishing process, thereby improving the arc-extinguishing performance.

[0032] As a preferred embodiment of the above-mentioned embodiment, as shown in Figure 3 The left base 1 is further provided with a row of fourth grooves 1-4 for placing the arc-extinguishing grid group 3, and the arc-extinguishing grids 3-1 of the arc-extinguishing grid group 3 are tightly arranged and inserted into the fourth grooves 1-4.

[0033] Specifically, by arranging a row of fourth grooves 1-4 on the left base 1, the arc-extinguishing grids 3-1 in the arc-extinguishing grid group 3 can be accurately positioned at the predetermined positions during installation, which not only simplifies the assembly process but also improves the assembly accuracy, ensures the tight arrangement and relative position accuracy between the arc-extinguishing grids, and can more effectively guide the arc to shuttle between the arc-extinguishing grids, thereby accelerating the cooling and extinguishing process of the arc. The tightly arranged arc-extinguishing grids can also provide more arc-extinguishing surface area, further improving the arc-extinguishing efficiency. The design of the fourth grooves 1-4 optimizes the spatial layout inside the arc-extinguishing chamber, allowing the arc-extinguishing grid group 3 to be more compactly installed on the left base 1. Not only does it save space, but it also helps to improve the overall structural compactness and aesthetics of the arc-extinguishing chamber. The tightly inserted arc-extinguishing grids 3-1 enhance the connection strength between the arc-extinguishing grids and the left base 1. During the arc-extinguishing process, the arc-extinguishing grids will be subjected to a large pressure and heat, and the tightly inserted design can ensure that the arc-extinguishing grids will not loosen or deform due to stress, thereby improving the structural stability of the arc-extinguishing chamber.

[0034] As a preferred embodiment of the above, as shown in Figure 3 The left base 1 is also provided with a through hole 1-5 and a clamping groove 1-6, the clamping groove 1-6 is used for clamping the gas production sheet 7, the through hole 1-5 is used for matching the left base 1 and the right base 2 with threaded fixing; a boss 1-7 is also provided, which is used for installing and limiting the right base 2; an arc leading sheet placing groove 1-8 is also provided and the arc leading sheet 9 is placed.

[0035] Specifically, the left base 1 and the right base 2 can be connected by threaded fixing through the through hole 1-5, this connection method is not only stable and reliable, but also convenient to disassemble and maintain. Through precise threaded matching, the tight connection between the left base 1 and the right base 2 can be ensured, thereby improving the overall structural stability of the arc extinguishing chamber. The clamping groove 1-6 is used for clamping the gas production sheet 7, this design simplifies the installation process of the gas production sheet, and at the same time ensures the stability and position accuracy of the gas production sheet in the arc extinguishing chamber. The clamping groove structure can also effectively prevent the gas production sheet from moving or deforming under the action of the arc, thereby ensuring the normal work of the gas production sheet. The boss 1-7 is provided for installing and limiting the right base 2, which can ensure the correct positioning of the left base 1 and the right base 2 during installation, avoiding performance degradation or damage caused by installation errors. The boss structure can also provide certain support, enhancing the overall structural strength of the arc extinguishing chamber. The arc leading sheet placing groove 1-8 is provided so that the arc leading sheet 9 can be conveniently placed in the predetermined position, which not only simplifies the assembly process, but also ensures the stability and position accuracy of the arc leading sheet in the arc extinguishing chamber. The arc leading sheet is a key component for guiding the arc into the arc extinguishing chamber. By integrating the through hole 1-5, the clamping groove 1-6, the boss 1-7 and the arc leading sheet placing groove 1-8, the left base 1 not only realizes stable connection with the right base 2, but also ensures the stability and position accuracy of the components in the arc extinguishing chamber, optimizes the structural layout of the arc extinguishing chamber, improves the arc extinguishing efficiency, and at the same time reduces the assembly difficulty and cost.

[0036] As a preferred embodiment of the above, as shown in Figure 4As shown, the right base 2 is provided with right base first groove 2-1, right base second groove 2-2 and right base third groove 2-3 symmetrically with the left base 1, the right base first groove 2-1 is matched with the first arc-extinguishing pressing piece 4 and is clamped in the groove, the right base second groove 2-2 is matched with the second arc-extinguishing pressing piece 5 and is clamped in the groove, the right base third groove 2-3 is matched with the arc-extinguishing plate 6 and is clamped in the groove, a row of square through holes 2-4 provided on the right base 2 are used for inserting the arc-extinguishing grid pieces 3-1 of the arc-extinguishing grid piece group 3 into the fourth groove 1-4 from the side; the right base 2 is further provided with right base through hole 2-5, which is used for matching the threaded connection and fixation of the left base 1 and the right base 2; right base clamping groove 2-6 is further provided and clamps the gas production piece 7, cover plate mounting groove 2-7 is further provided and matches the installation of the cover plate 8; four threaded inserts 2-8 are further provided and match the fixation of the cover plate 8, right base fourth groove 2-9 and right base fifth groove 2-10 are further provided, the right base fourth groove 2-9 is matched with the clamping groove 1-6, the right base fifth groove 2-10 is matched with the boss 1-7 for limiting, and right base sixth groove 2-11 is used for placing the arc striking piece 9.

[0037] Specifically, the right base first groove 2-1, the right base second groove 2-2 and the right base third groove 2-3 on the right base 2 are symmetrically arranged with the corresponding grooves on the left base 1, which ensures the uniform distribution and stable clamping of the first arc-extinguishing pressing piece 4, the second arc-extinguishing pressing piece 5 and the arc-extinguishing plate 6 on the left and right bases, improves the structural symmetry of the arc-extinguishing chamber, and enhances the interaction between the components and the overall stability. The arrangement of the row of square through holes 2-4 allows the multiple arc-extinguishing grid pieces 3-1 of the arc-extinguishing grid piece group 3 to be conveniently inserted into the fourth groove 1-4 of the left base 1 from the side, which simplifies the installation process of the arc-extinguishing grid pieces and ensures the close arrangement and stability of the arc-extinguishing grid pieces in the arc-extinguishing chamber. The right base through hole 2-5 cooperates with the through hole 1-5 on the left base 1 for threaded connection and fixation of the left and right bases, which not only provides a stable connection mode, but also facilitates disassembly and maintenance. Through precise threaded cooperation, the overall structural stability of the arc-extinguishing chamber can be ensured. The right base clamping groove 2-6 is used for clamping the gas production piece 7 and is symmetrically arranged with the clamping groove 1-6 on the left base, which ensures the uniform distribution and stable clamping of the gas production piece in the arc-extinguishing chamber and improves the reliability and working efficiency of the gas production piece. The arrangement of the cover plate mounting groove 2-7 allows the cover plate 8 to be conveniently installed and fixed, which not only simplifies the assembly process, but also improves the connection strength and sealing performance between the cover plate and the right base. The arrangement of the four threaded inserts 2-8 is used to cooperate with the fixation of the cover plate 8, which provides additional connection points and stability and ensures the firm installation of the cover plate in the arc-extinguishing chamber, preventing performance degradation or damage due to looseness. The right base fourth groove 2-9 cooperates with the clamping groove 1-6 on the left base, and the right base fifth groove 2-10 cooperates with the boss 1-7 on the left base for limiting, which not only ensures the correct positioning and installation precision between the left and right bases, but also improves the overall structural strength and stability of the arc-extinguishing chamber. The right base sixth groove 2-11 is used for placing the arc striking piece 9 and is symmetrically arranged with the arc striking piece placing groove 1-8 on the left base, which ensures the uniform distribution and stable placement of the arc striking piece in the arc-extinguishing chamber and improves the arc striking efficiency and arc-extinguishing performance.

[0038] As a preferred embodiment of the above, as shown in Figure 5 The multiple arc-extinguishing grid pieces 3-1 of the arc-extinguishing grid piece group 3 are in a concave structure, and the two sides are provided with protrusions 3-2 and cooperate with the fourth groove 1-4.

[0039] Specifically, the arc extinguishing grid sheet 3-1 is designed with a concave structure, which can more effectively guide the electric arc to shuttle between the grid sheets, increase the contact area between the electric arc and the grid sheets, and thus accelerate the cooling and extinguishing process of the electric arc. The concave structure also provides a larger heat dissipation area, which helps to dissipate the heat generated by the electric arc more quickly, further improving the arc extinguishing efficiency. The protrusions 3-2 on both sides of the arc extinguishing grid sheet 3-1 cooperate with the fourth groove 1-4 on the left base 1 to ensure the stability and positional accuracy of the arc extinguishing grid sheet during installation. The protrusions 3-2 not only serve as positioning elements, but also enhance the connection strength between the arc extinguishing grid sheet and the left base. During the arc extinguishing process, the protrusions 3-2 can prevent the arc extinguishing grid sheet from loosening or deforming due to stress, thereby ensuring the stability and reliability of the arc extinguishing chamber. The design of the concave structure and the protrusions 3-2 optimizes the spatial layout inside the arc extinguishing chamber, allowing the arc extinguishing grid sheet group 3 to be more compactly installed on the left base 1, which not only saves space but also helps to improve the overall structural compactness and aesthetics of the arc extinguishing chamber. Through the cooperative design of the concave structure and the protrusions 3-2, the arc extinguishing grid sheet group 3 can more effectively divide and guide the electric arc, accelerating the extinguishing process of the electric arc. At the same time, the protrusions 3-2 also enhance the heat conduction efficiency between the arc extinguishing grid sheet and the left base, which helps to dissipate the heat generated by the electric arc more quickly, further improving the arc extinguishing performance.

[0040] As a preferred embodiment of the above-mentioned embodiment, as shown in Figure 6 The gas production sheet 7 is provided with a plurality of protrusions 7-1, which are evenly distributed between the arc extinguishing grid sheets 3-1 after insertion, and a buckle 7-2, which cooperates with the card slot 1-6 and the right base card slot 2-6. The gas production sheet 7 is symmetrically arranged and clamped on the left base 1 and the right base 2.

[0041] Specifically, the plurality of protrusions 7-1 provided on the gas production sheet 7 can be evenly distributed between the arc extinguishing grid sheets 3-1 after plugging. This design not only ensures the close contact between the gas production sheet and the arc extinguishing grid sheet, but also improves the gas production efficiency. When the arc is generated, the protrusions 7-1 can more effectively promote the generation and distribution of gas, thereby accelerating the cooling and extinguishing process of the arc. The buckle 7-2 provided on the gas production sheet 7 cooperates with the clamping groove 1-6 on the left base 1 and the right base clamping groove 2-6 on the right base 2, simplifying the installation process of the gas production sheet and ensuring the stability and positional accuracy of the gas production sheet in the arc extinguishing chamber. The buckle structure not only provides additional connection strength, but also prevents the gas production sheet from moving or deforming under the action of the arc. The gas production sheet 7 is symmetrically arranged on the left base 1 and the right base 2 and is clamped by cooperating the buckle 7-2 with the clamping groove, which not only improves the structural symmetry of the arc extinguishing chamber, but also enhances the connection strength between the left and right bases. The symmetrically arranged gas production sheets can more evenly distribute the gas, further improving the arc extinguishing efficiency. Through the design of the plurality of protrusions 7-1, the buckle 7-2 and the cooperation with the clamping groove, the gas production sheet 7 can more effectively promote the generation and distribution of gas, thereby accelerating the extinguishing process of the arc, optimizing the gas flow in the arc extinguishing chamber and improving the arc extinguishing performance. The cooperation of the buckle 7-2 and the clamping groove not only simplifies the installation process, but also improves the connection strength between the gas production sheet and the left and right bases, enhances the overall structural stability of the arc extinguishing chamber and prevents performance degradation or damage due to loose parts.

[0042] As a preferred embodiment of the above, as shown in Figure 7 The cover plate 8 is provided with a counterbore 8-1 which cooperates with the threaded insert 2-8 and is fixed by threaded connection.

[0043] Specifically, the counterbore 8-1 provided on the cover plate 8 cooperates with the threaded insert 2-8 on the right base 2. The design of the counterbore enables the threaded connection part to be embedded inside the cover plate, which not only reduces the external protruding part, improves the overall aesthetics, but also enhances the connection strength and stability.

[0044] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An arc extinguishing chamber for circuit breaker, characterized in that: it comprises a left base (1), a right base (2), an arc extinguishing grid group (3), a first arc extinguishing pressing piece (4), a second arc extinguishing pressing piece (5), an arc extinguishing plate (6), a gas generating piece (7), a cover plate (8), and an arc leading piece (9); the left base (1) and the right base (2) are symmetrically arranged; the arc extinguishing grid group (3) is provided with a plurality of arc extinguishing grids (3-1) arranged side by side, and the right base (2) is provided with a square through hole (2-4), and the arc extinguishing grids (3-1) are inserted into the left base (1) through the square through hole (2-4); the cover plate (8) is connected and fixed to the right base (2); the left base (1) and the right base (2) are provided with symmetric grooves on both sides, and the first arc extinguishing pressing piece (4), the second arc extinguishing pressing piece (5), and the arc extinguishing plate (6) are inserted into the symmetric grooves; the gas generating piece (7) is symmetrically clamped inside the left base (1) and the right base (2).

2. The arc chute for circuit breakers according to claim 1, characterized in that the left base (1) is provided with a first groove (1-1), a second groove (1-2), and a third groove (1-3), the first groove (1-1) is matched with the first arc extinguishing pressing piece (4) and clamped in the groove, the second groove (1-2) is matched with the second arc extinguishing pressing piece (5) and clamped in the groove, and the third groove (1-3) is matched with the arc extinguishing plate (6) and clamped in the groove.

3. The arc chute for circuit breakers according to claim 2, characterized in that the left base (1) is further provided with a row of fourth grooves (1-4) for placing the arc extinguishing grid group (3), and the arc extinguishing grids (3-1) of the arc extinguishing grid group (3) are closely arranged and inserted into the fourth grooves (1-4).

4. The arc chute for circuit breakers according to claim 3, characterized in that the left base (1) is further provided with a through hole (1-5) and a clamping groove (1-6), the clamping groove (1-6) is used for clamping the gas generating piece (7), the through hole (1-5) is used for matching the left base (1) and the right base (2) with threaded fixing; a boss (1-7) is further provided, which is used for limiting with the right base (2); an arc leading piece placing groove (1-8) is further provided and the arc leading piece (9) is placed.

5. The arc chute for circuit breakers according to claim 4, characterized in that The right base (2) is provided with a right base first groove (2-1), a right base second groove (2-2) and a right base third groove (2-3) which are symmetrical with the left base (1), the right base first groove (2-1) is matched with the first arc extinguishing pressing piece (4) and is clamped in the groove, the right base second groove (2-2) is matched with the second arc extinguishing pressing piece (5) and is clamped in the groove, the right base third groove (2-3) is matched with the arc extinguishing plate (6) and is clamped in the groove, a row of square through holes (2-4) are arranged on the right base (2) and are used for inserting a plurality of arc extinguishing grid pieces (3-1) of the arc extinguishing grid piece group (3) into the fourth groove (1-4) from the side; a right base through hole (2-5) is further arranged on the right base (2) and is used for matching the left base (1) and the right base (2) for threaded connection and fixation; a right base clamping groove (2-6) is further arranged and clamps the gas production piece (7), a cover plate mounting groove (2-7) is further arranged and matches the cover plate (8) for installation; four threaded inserts (2-8) are further arranged and match the cover plate (8) for fixation, a right base fourth groove (2-9) and a right base fifth groove (2-10) are further arranged, the right base fourth groove (2-9) matches the clamping groove (1-6), the right base fifth groove (2-10) matches the boss (1-7) for limiting, and a right base sixth groove (2-11) is used for placing the arc striking piece (9).

6. The arc chute for circuit breakers according to claim 5, characterized in that The plurality of arc extinguishing grid pieces (3-1) of the arc extinguishing grid piece group (3) are in a concave structure, and protrusions (3-2) are arranged on both sides and match the fourth groove (1-4).

7. The arc chute for circuit breakers according to claim 6, characterized in that The gas production piece (7) is provided with a plurality of protrusions (7-1), the protrusions (7-1) are uniformly distributed between the arc extinguishing grid pieces (3-1) after insertion, and a buckle (7-2) is further arranged, the buckle (7-2) matches the clamping groove (1-6) and the right base clamping groove (2-6); the gas production piece (7) is symmetrically arranged and clamped on the left base (1) and the right base (2).

8. The arc chute for circuit breakers according to claim 7, characterized in that The cover plate (8) is provided with a counterbore (8-1), the counterbore (8-1) matches the threaded insert (2-8) and is fixed by threaded connection.

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