High-efficiency arc extinguishing chamber

Abstract

The utility model relates to the technical field of electrical switch equipment, in particular to a high-efficiency arc extinguishing chamber, which comprises a fixed plate, arc extinguishing grid plates and a slit assembly, the number of the fixing plates is two, and the two fixing plates are oppositely arranged. The arc-extinguishing grid plate is arranged between the two fixing plates and is composed of a first arc-extinguishing grid plate group, a second arc-extinguishing grid plate group and a third arc-extinguishing grid plate group which are arranged in an L shape and are connected in sequence; the slit assembly is composed of two gas generating plates and is arranged at the concave positions among the first arc extinguishing grid piece set, the second arc extinguishing grid piece set and the third arc extinguishing grid piece set, and the two gas generating plates are arranged at a certain interval to form a slit space for a moving contact to stretch in. According to the arc extinguish chamber, the arc extinguish efficiency is effectively improved through the unique arc extinguish grid sheet layout and the slit assembly design. And the L-shaped arc extinguishing grid sheet group is compact in layout, so that the arc can be better guided, and the arc extinguishing effect is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of electrical switchgear technology, specifically to an arc-extinguishing chamber with high efficiency arc extinguishing, which is particularly suitable for arc breaking structures in low-voltage circuit breakers. Background Technology

[0002] In power systems, arc-extinguishing chambers are key components of circuit breakers and other switching equipment. Their main function is to quickly extinguish electric arcs when a circuit is broken, ensuring the safe and stable operation of the power system.

[0003] Traditional arc-extinguishing chambers have certain limitations in design and structure. Common arc-extinguishing chamber layouts are simple, which results in limited arc-extinguishing performance in practical applications, potentially leading to prolonged arc extinguishing time, increased risks during switching operations, and damage to equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an arc-extinguishing chamber with high efficiency.

[0005] The technical solution adopted by this utility model is as follows: an arc-extinguishing chamber with high efficiency arc extinguishing, comprising a fixing plate, an arc-extinguishing grid plate and a slit assembly; the fixing plate is provided in two and arranged opposite to each other;

[0006] The arc-extinguishing grid is disposed between two fixed plates and consists of a first arc-extinguishing grid group, a second arc-extinguishing grid group, and a third arc-extinguishing grid group arranged in an "L" shape and connected in sequence. The first arc-extinguishing grid group consists of at least two parallel arc-extinguishing grids, and the third arc-extinguishing grid group consists of at least two parallel arc-extinguishing grids that are perpendicular to the first arc-extinguishing grid group. The second arc-extinguishing grid group is disposed at the corner and the arc-extinguishing grids therein are arranged radially with the adjacent arc-extinguishing grids.

[0007] The slit assembly consists of two gas-generating plates, which are disposed in the recess between the first arc-extinguishing grid group, the second arc-extinguishing grid group, and the third arc-extinguishing grid group. The two gas-generating plates are arranged at a certain distance to form a slit space for the moving contact to extend into and move.

[0008] The gas-generating plate is provided with several inserts extending into the gaps between adjacent arc-extinguishing grid plates. The outer side of the inserts is provided with a curved surface, and the curved surfaces of two inserts located in the gaps between the same pair of adjacent arc-extinguishing grid plates are in the shape of the number "8".

[0009] The arc-extinguishing grids in the second arc-extinguishing grid group are arranged on the radial line of the center.

[0010] The second arc-extinguishing grid group has a V-shaped transition plate between the arc-extinguishing grid plates and the adjacent arc-extinguishing grid plates.

[0011] The transition piece includes a first arc-leading piece and a second arc-leading piece. The front ends of the first arc-leading piece and the second arc-leading piece are connected to form a "V"-shaped transition piece. The front ends of the first arc-leading piece and the second arc-leading piece are provided with triangular notches, and the outer edges of the two notches overlap to form a quadrilateral through groove.

[0012] The outer center of the notch of the first and second arc-inducing plates is located on the transverse centerline of the transition plate, and the inner corners of the notch of the first and second arc-inducing plates are located above and below the transverse centerline of the transition plate, respectively.

[0013] An arc-extinguishing tip is formed in the inner corner of the notch of the first and second arc-inducing plates.

[0014] The beneficial effects of this invention are as follows: The arc-extinguishing chamber of this invention effectively improves arc-extinguishing efficiency through its unique arc-extinguishing grid layout and slit assembly design. The compact "L"-shaped arc-extinguishing grid assembly better guides the arc and enhances the arc-extinguishing effect. The inserts and curved surface design on the gas-generating plate facilitates rapid gas generation and uniform electric field distribution. The transition plate and its special structure further optimize arc-initiating and arc-extinguishing performance, improving the overall working efficiency and stability of the arc-extinguishing chamber. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a perspective view of one embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional view from one angle of one embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional view from another angle of one embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the gas-generating plate in one embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the transition plate in one embodiment of the present invention.

[0021] In the figure, the fixed plate is 100, the first arc-extinguishing grid plate group is 210, the second arc-extinguishing grid plate group is 220, the third arc-extinguishing grid plate group is 230, the gas-generating plate is 310, the insert is 320, the curved surface is 321, the transition plate is 400, the first arc-inducing plate is 410, the second arc-inducing plate is 420, the quadrilateral through groove is 430, and the arc-extinguishing tip is 440. Detailed Implementation

[0022] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0023] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0024] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0025] An arc-extinguishing chamber with high efficiency, such as Figure 1 , Figure 2 As shown, it includes a fixing plate 100, an arc-extinguishing grid plate, and a slit assembly. The fixed plate 100 has two members arranged opposite to each other. The arc-extinguishing grid is disposed between the two fixed plates 100 and consists of a first arc-extinguishing grid group 210, a second arc-extinguishing grid group 220, and a third arc-extinguishing grid group 230 arranged in an "L" shape and connected in sequence. The first arc-extinguishing grid group 210 consists of at least two parallel arc-extinguishing grids, and the third arc-extinguishing grid group 230 consists of at least two parallel arc-extinguishing grids that are perpendicular to the first arc-extinguishing grid group 210. The second arc-extinguishing grid group 220 is disposed at a corner and its arc-extinguishing grids are arranged radially with adjacent arc-extinguishing grids. The slit assembly consists of two gas-generating plates 310 disposed in a recess between the first arc-extinguishing grid group 210, the second arc-extinguishing grid group 220, and the third arc-extinguishing grid group 230. The two gas-generating plates 310 are arranged at a certain distance to form a slit space for the moving contact to extend into and move. The first arc-extinguishing grid group, with at least two parallel arc-extinguishing grids, can initially segment and cool the electric arc. The arc-extinguishing grids in the third group, arranged perpendicularly to the first group, further alter the arc's trajectory and lengthen it, enhancing the arc-extinguishing effect. The second arc-extinguishing grid group, located at the corner, has radially arranged grids that effectively guide the arc's flow at the corner, preventing arc accumulation and stagnation.

[0026] The two gas-generating plates of the slit assembly are positioned in the recess between the three sets of arc-extinguishing grids, forming a slit space into which the moving contact extends. When the circuit is interrupted and an electric arc is generated, the arc enters the slit space, and the gas-generating plates rapidly generate gas, increasing the pressure inside the arc-extinguishing chamber, thereby accelerating the cooling and extinguishing of the arc.

[0027] like Figure 3 , Figure 4 As shown, the gas-generating plate 310 is provided with a plurality of inserts 320 extending into the gaps between adjacent arc-extinguishing grids. The outer surface of each insert 320 is provided with a curved surface 321. The curved surfaces 321 of two inserts 320 located in the gaps between the same pair of adjacent arc-extinguishing grids are in a figure-eight shape. The curved surface design of the inserts on the gas-generating plate extending into the gaps between adjacent arc-extinguishing grids, especially the figure-eight arrangement, can optimize the flow path of the arc between the arc-extinguishing grids, improve the arc-extinguishing efficiency, and the figure-eight curved surface can further generate gas to push back the arc that is backflowing with the airflow, preventing the arc that is backflowing with the airflow from acting on the gas-generating plates 310 on both sides of the moving contact again, thus affecting the width of the slit space.

[0028] The arc-extinguishing grids in the second arc-extinguishing grid group 220 are arranged along the radial line of the center. This arrangement allows the arc to change direction more smoothly when passing through corners, reducing energy loss.

[0029] The second arc-extinguishing grid group 220 has a V-shaped transition plate 400 between the arc-extinguishing grids and the adjacent arc-extinguishing grids, which further enhances the guiding and dispersing effect on the electric arc. Figure 5 The structure of the transition plate 400 after unfolding includes a first arc-inducing plate 410 and a second arc-inducing plate 420. The front ends of the first arc-inducing plate 410 and the second arc-inducing plate 420 are connected to form a "V"-shaped transition plate 400. The front ends of the first arc-inducing plate 410 and the second arc-inducing plate 420 are provided with triangular notches, and the outer edges of the two notches overlap to form a quadrilateral through slot 430. The overlapping of the triangular notches at the front ends of the first and second arc-inducing plates in the transition plate to form a quadrilateral through slot facilitates the passage and uniform distribution of the electric arc.

[0030] The outer center of the notch in the first arc-initiating plate 410 and the second arc-initiating plate 420 is located on the transverse centerline L of the transition plate 400, and the inner angles of the notch in the first arc-initiating plate 410 and the second arc-initiating plate 420 are located above and below the transverse centerline of the transition plate 400, respectively. This asymmetrical design makes the arc generate a stronger electromagnetic force when it passes through, thereby accelerating the elongation and cooling of the arc.

[0031] An arc-extinguishing tip 440 is formed in the inner corner of the notch in the first arc-initiating plate 410 and the second arc-initiating plate 420. The arc-extinguishing tip formed in the inner corner of the notch in the first arc-initiating plate and the second arc-initiating plate can concentrate the electric field, increase the local electric field strength, and promote the rapid extinguishing of the arc.

[0032] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An arc extinguishing chamber with high-efficiency arc extinguishing, comprising a fixing plate (100), arc extinguishing grid sheets and a slit component; characterized in that: There are two fixing plates (100) which are arranged oppositely; The arc extinguishing grid sheets are arranged between the two fixing plates (100), and are composed of a first arc extinguishing grid sheet group (210), a second arc extinguishing grid sheet group (220) and a third arc extinguishing grid sheet group (230) which are sequentially connected and arranged in an "L" shape. The first arc extinguishing grid sheet group (210) is composed of at least two parallel arc extinguishing grid sheets, the third arc extinguishing grid sheet group (230) is composed of at least two parallel arc extinguishing grid sheets which are perpendicular to the first arc extinguishing grid sheet group (210), and the second arc extinguishing grid sheet group (220) is arranged at the corner, and the arc extinguishing grid sheets arranged therein are radially arranged with adjacent arc extinguishing grid sheets; The slit component is composed of two gas generating plates (310), and is arranged in the recess between the first arc extinguishing grid sheet group (210), the second arc extinguishing grid sheet group (220) and the third arc extinguishing grid sheet group (230). The two gas generating plates (310) are arranged at a certain interval to form a slit space for the moving contact to extend into.

2. The high-efficiency arc quenching arc chute of claim 1, wherein: A plurality of inserting pieces (320) extending into the gaps between adjacent arc extinguishing grid sheets are arranged on the gas generating plate (310). The outer side surface of the inserting piece (320) has a curved surface (321), and the curved surfaces (321) of the two inserting pieces (320) in the gaps between the same pair of adjacent arc extinguishing grid sheets are in an "eight" shape.

3. The high-efficiency arc quenching arc chute of claim 1, wherein: The arc extinguishing grid sheets arranged in the second arc extinguishing grid sheet group (220) and adjacent arc extinguishing grid sheets are arranged on the center radiation line of the circle.

4. The high-efficiency arc quenching arc chute of claim 3, wherein: A "V"-shaped transition piece (400) is arranged between the arc extinguishing grid sheets arranged in the second arc extinguishing grid sheet group (220) and adjacent arc extinguishing grid sheets.

5. The high-efficiency arc quenching arc chute of claim 4, wherein: The transition piece (400) includes a first arc leading piece (410) and a second arc leading piece (420). The front ends of the first arc leading piece (410) and the second arc leading piece (420) are connected to form a "V"-shaped transition piece (400). Triangular slots are arranged at the front ends of the first arc leading piece (410) and the second arc leading piece (420), and the outer edges of the two slots coincide to form a quadrilateral through slot (430).

6. The high-efficiency arc quenching arc chute of claim 5, wherein: The centers of the outer edges of the slots of the first arc leading piece (410) and the second arc leading piece (420) are located on the transverse center line (L) of the transition piece (400), and the inner angles of the slots of the first arc leading piece (410) and the second arc leading piece (420) are respectively located above and below the transverse center line of the transition piece (400).

7. The high-efficiency arc quenching arc chute of claim 6, wherein: Arc extinguishing tips (440) are formed in the inner angles of the slots of the first arc leading piece (410) and the second arc leading piece (420).

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