Arc extinguishing device with fan-shaped layout

Abstract

The utility model relates to the technical field of arc extinguishing devices, in particular to an arc extinguishing device with a fan-shaped layout, which comprises two mounting plates and a plurality of arc extinguishing grid sheets fixed between the two mounting plates, the plurality of arc extinguishing grid sheets are distributed in a fan-shaped layout, and one side of each arc extinguishing grid sheet is provided with a trapezoidal notch for a moving contact to extend into; a slit assembly is arranged on the side, provided with the trapezoid notch, of each arc extinguishing grid piece and comprises two gas generating plates, a slit allowing the movable contact to stretch into is formed between the two gas generating plates, the gas generating plates are in an arc shape, and the circle centers of the gas generating plates coincide with the circle centers of the fan-shaped distribution of the arc extinguishing grid pieces. And the outer arc edge of the gas generation plate extends to the arc extinguishing grid sheets and is provided with a plurality of insertion ports for the front ends of the arc extinguishing grid sheets to insert. According to the utility model, the arc extinguishing grid sheets are provided with the trapezoidal notches for the movable contacts to extend into, cutting arcs are more comprehensively and effectively captured, and the gas generation plates with the edges extending to the positions between the arc extinguishing grid sheets are arranged and fully act with the arcs to generate gas and blow the arcs, so that the arcs are further quickly pushed to the deep positions of the arc extinguishing grid sheets, and the cooling and extinguishing of the arcs are accelerated.

Description

Technical Field

[0001] This utility model and arc extinguishing device technical field specifically relates to an arc extinguishing device with a fan-shaped layout. Background Technology

[0002] In power systems, arc-extinguishing devices are crucial for ensuring the safe interruption of circuits. Chinese Patent CN201910283630.7 discloses an arc-extinguishing device and method with an integrated arc-isolating cover. The arc-extinguishing device with an integrated arc-isolating cover includes an arc-extinguishing chamber and an arc-isolating cover. The arc-extinguishing chamber includes a left arc-isolating plate, a right arc-isolating plate, and multiple arc-extinguishing grids. A stationary contact is disposed on the lower side of the arc-extinguishing device, and the stationary contact has a stationary contact point. One end of a moving contact is located on the right side of the arc-extinguishing device via a rotating shaft, and the other end of the moving contact has a moving contact point. The moving contact point extends through the channel to the right space of the arc-extinguishing device, and rotates around the rotating shaft to contact or separate from the stationary contact point. The arc-cutting portions of each arc-extinguishing grid are arranged in a fan shape with the rotating shaft as the center. That is, the angle of inclination of the arc-cutting portions of the arc-extinguishing grid gradually increases from bottom to top, and the extended axis of each arc-extinguishing grid passes through the rotating shaft. The above structure has limited efficiency in capturing electric arcs, and its arc-extinguishing effect needs to be further improved. Utility Model Content

[0003] The purpose of this invention is to provide an arc-extinguishing device with a fan-shaped layout to solve the problems existing in the current arc-extinguishing device and improve the arc-extinguishing efficiency and performance.

[0004] The technical solution adopted by this utility model is as follows: A fan-shaped arc extinguishing device includes two mounting plates and a plurality of arc extinguishing grids fixed between the two mounting plates. The plurality of arc extinguishing grids are arranged in a fan-shaped layout. One side of each arc extinguishing grid is provided with a trapezoidal slot for a moving contact to extend into. A slit assembly is provided on the side of each arc extinguishing grid with the trapezoidal slot. The slit assembly includes two gas generating plates. A slit for a moving contact to extend into is formed between the two gas generating plates. The gas generating plates are arc-shaped and their centers coincide with the center of the fan-shaped distribution of the arc extinguishing grids. The outer arc edge of the gas generating plates extends to the space between the arc extinguishing grids and is provided with a plurality of insertion slots for the front end of the arc extinguishing grids to be inserted.

[0005] The gas-generating plate is composed of a first arc-shaped part located on the inner arc and a second arc-shaped part located on the outer arc. The second arc-shaped part has an inclined air blowing surface, so that the distance between the air blowing surfaces of the two gas-generating plates gradually increases from the inside to the outside. The inlet is located on the second arc-shaped part.

[0006] The air blowing surface is curved, and the air blowing surfaces of the two air generating plates are in the shape of the number "8".

[0007] The depth of the insertion port is less than the width of the air blowing surface.

[0008] A magnet is fixed on the first arc-shaped part.

[0009] The magnet is provided in two parts, and the two magnets are respectively positioned close to both ends of the arc.

[0010] The gas-generating plate is fixed on the mounting plate. The first arc-shaped part is attached to the mounting plate, and a groove adapted to the magnet is opened on the back of the mounting plate. The magnet is located in the groove, and the mounting plate limits the magnet.

[0011] The first arc-shaped portion is provided with screw holes, and the mounting plate is fixedly connected to the first arc-shaped portion by bolts.

[0012] The depth of the trapezoidal slot is greater than that of the insertion port.

[0013] It also includes an arc-initiating plate, which is disposed on one side of a plurality of arc-extinguishing grid plates and is arranged in a fan-shaped layout with the plurality of arc-extinguishing grid plates. The arc-initiating plate has an arc-initiating portion extending between two gas-generating plates. The arc-initiating portion is used to cooperate with the moving contact at the open position to initiate an arc.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a trapezoidal slot on the arc-extinguishing grid plate for the moving contact to extend into, which more comprehensively and effectively captures and cuts the electric arc. In addition, it provides a gas-generating plate with its edge extending to the space between the arc-extinguishing grid plates, which fully interacts with the electric arc to generate gas and blow away the arc, further pushing the electric arc quickly into the depth of the arc-extinguishing grid plate, accelerating the cooling and extinguishing of the electric arc. 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 layout structure of one embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the structure of an arc-extinguishing grid sheet according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of a gas-generating plate according to the present invention;

[0019] Figure 4 This is a cross-sectional schematic diagram of a gas-generating plate with an insertion port according to the present invention;

[0020] Figure 5This is a cross-sectional schematic diagram of a gas-generating plate with a grooved portion according to the present invention;

[0021] In the figure, mounting plate-1, arc extinguishing grid plate-2, trapezoidal slot-201, gas generating plate-3, socket-301, first arc-shaped part-302, second arc-shaped part-303, air blowing surface-304, groove-305, screw hole-306, magnet-4, arc ignition plate-5, arc ignition part-501. 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, and side, 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 device with a fan-shaped layout includes two mounting plates 1 and a plurality of arc-extinguishing grid plates 2 fixed between the two mounting plates 1, such as... Figure 1 As shown, several arc-extinguishing grid plates 2 are arranged in a fan-shaped layout, such as... Figure 2 As shown, the arc-extinguishing grid plate 2 has a trapezoidal slot 201 on one side for the moving contact to extend into; the arc-extinguishing grid plate 2 has a slit assembly on the side with the trapezoidal slot 201, the slit assembly including two gas-generating plates 3, and a slit for the moving contact to extend into is formed between the two gas-generating plates 3, as shown. Figure 3 , Figure 4 As shown, the gas generating plate 3 is arc-shaped and its center coincides with the center of the fan-shaped distribution of the arc extinguishing grid plate 2. The outer arc edge of the gas generating plate 3 extends to the space between the arc extinguishing grid plates 2 and is provided with several insertion slots 301 for the front end of the arc extinguishing grid plate 2 to be inserted.

[0026] In this embodiment, during installation, the moving contact extends into the slit and the moving point enters the trapezoidal slot. The stationary contact is installed on one side of several arc-extinguishing grid plates 2 and cooperates with the moving contact to realize the opening and closing action. Figure 1In the diagram, the dotted line represents the movement path of the moving contact after assembly. When the circuit breaker is opened, the generated arc is located in the trapezoidal slot, allowing the arc to enter the arc-extinguishing grid area without obstruction. This ensures precise positioning of the arc's starting position, enabling omnidirectional arc capture and significantly improving initial arc-extinguishing efficiency, resulting in more comprehensive and effective arc capture and cutting. Furthermore, the gas-generating plate extending to the arc-extinguishing grid is a major highlight of this device. The arc-shaped design of the gas-generating plate perfectly matches the fan-shaped layout of the arc-extinguishing grid, with its outer arc edge cleverly inserted between the grids, forming a tight and orderly structure. The gas-generating plate is not merely an auxiliary component but a key element that fully interacts with the arc. When an arc is generated in the trapezoidal slot, the gas-generating plate quickly interacts with the arc, generating a large amount of gas. This gas creates strong pressure within the confined space, producing a powerful blowing effect that further propels the arc rapidly deeper into the arc-extinguishing grid. During this process, the electric arc is continuously stretched and cooled, accelerating the dissipation of its energy and thus achieving rapid extinguishing.

[0027] Specifically, the gas-generating plate 3 is composed of a first arc-shaped portion 302 located on the inner arc and a second arc-shaped portion 303 located on the outer arc. The second arc-shaped portion 303 has an inclined air-blowing surface 304, so that the distance between the air-blowing surfaces 304 of the two gas-generating plates 3 gradually increases from the inside to the outside. The insertion port 301 is located on the second arc-shaped portion 303. Furthermore, the air-blowing surface 304 is curved, and the air-blowing surfaces 304 of the two gas-generating plates 3 form an "eight" shape. This design makes the air-blowing effect more concentrated and powerfully directed towards the arc-escape direction, and can more efficiently push the arc to move deeper into the arc-extinguishing grid. At the same time, the insertion port on the gas-generating plate allows the front end of the arc-extinguishing grid to be inserted, which not only enhances the stability of the structure, but also ensures a tight fit between the gas-generating plate and the arc-extinguishing grid, making the entire arc-extinguishing process smooth and efficient.

[0028] Furthermore, the depth of the socket 301 is less than the width of the air blowing surface 304. This allows the effective area of ​​the air blowing surface 304 to more effectively cover the generated electric arc, preventing the electric arc from dissipating in the opposite direction into the switch.

[0029] Furthermore, a magnet 4 is fixed on the first arc-shaped portion 302, which can generate a magnetic field and exert an electromagnetic force on the electric arc, further guiding the movement and dispersion of the electric arc and improving the arc extinguishing effect.

[0030] Two magnets 4 are provided, and the two magnets 4 are respectively positioned close to both ends of the arc. The two magnets 4 can form a uniform magnetic field, which can generate a strong arc-inducing effect throughout the entire circuit breaker opening process.

[0031] Specifically, the gas-generating plate 3 is fixed to the mounting plate 1, and the first arc-shaped portion 302 fits against the mounting plate 1 as follows: Figure 5As shown, the back of the mounting plate 1 has a groove 305 adapted to the magnet 4, and the magnet 4 is located in the groove 305. The mounting plate 1 limits the movement of the magnet 4. The first arc-shaped portion 302 has a screw hole 306, and the mounting plate 1 is fixedly connected to the first arc-shaped portion 302 by bolts. This makes assembly more convenient.

[0032] Furthermore, the depth of the trapezoidal slot 201 is greater than that of the insertion slot 301.

[0033] Furthermore, it also includes an arc-initiating plate 5, which is disposed on one side of several arc-extinguishing grid plates 2 and arranged in a fan-shaped layout with the arc-extinguishing grid plates 2. The arc-initiating plate 5 has an arc-initiating portion 501 extending between two gas-generating plates 3. The arc-initiating portion 501 is used to cooperate with the moving contact at the open position to initiate an arc. In actual assembly, the arc-initiating plate 5 and the stationary contact are respectively located on both sides of the arc-extinguishing grid plates 2 arranged in a fan shape. The stationary contact of the stationary contact needs to be located between the two gas-generating plates and cooperate with the moving contact. The arc-initiating portion 501 of the arc-initiating plate 5 can cooperate with the moving contact that has moved to the open position when the circuit is opened, quickly introducing the arc remaining on the moving contact into the arc-extinguishing area, further improving the arc-extinguishing effect of the entire arc-extinguishing device.

[0034] 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. A fan-shaped arc-extinguishing device, comprising two mounting plates (1) and a plurality of arc-extinguishing grid plates (2) fixed between the two mounting plates (1), characterized in that: A number of arc extinguishing grid plates (2) are distributed in a fan-shaped layout. A trapezoidal notch (201) for the moving contact to extend into is provided on one side of the arc extinguishing grid plate (2); a slit component is provided on the side of the arc extinguishing grid plate (2) with the trapezoidal notch (201). The slit component includes two gas generating plates (3). A slit for the moving contact to extend into is formed between the two gas generating plates (3). The gas generating plates (3) are arc-shaped and the center of the circle of their arc shape coincides with the center of the fan-shaped distribution of the arc extinguishing grid plates (2). The outer arc edge of the gas generating plate (3) extends between the arc extinguishing grid plates (2) and a number of sockets (301) are provided for the front ends of the arc extinguishing grid plates (2) to be inserted into.

2. The sectorally arranged arc extinguishing device according to claim 1, characterized in that: The gas generating plate (3) is composed of a first arc-shaped part (302) located on the inner arc and a second arc-shaped part (303) located on the outer arc connected to each other. The second arc-shaped part (303) has an air blowing surface (304) arranged obliquely, so that the distance between the air blowing surfaces (304) of the two gas generating plates (3) gradually increases from the inside to the outside; the socket (301) is located on the second arc-shaped part (303).

3. The sectorally arranged arc extinguishing device according to claim 2, characterized in that: The air blowing surface (304) is a curved surface, and the air blowing surfaces (304) of the two gas generating plates (3) are in a "V" shape.

4. The sectorally arranged arc extinguishing device according to claim 2, characterized in that: The depth of the socket (301) is less than the width of the air blowing surface (304).

5. The sectorally arranged arc extinguishing device according to claim 2, characterized in that: A magnet (4) is fixed on the first arc-shaped part (302).

6. The sectorally arranged arc extinguishing device according to claim 5, characterized in that: There are two magnets (4) and the two magnets (4) are respectively arranged close to both ends of the arc.

7. The sectorally arranged arc extinguishing device according to claim 6, characterized in that: The gas generating plate (3) is fixed on the mounting plate (1). The first arc-shaped part (302) is fitted to the mounting plate (1) and a slot (305) adapted to the magnet (4) is opened on the back surface of the first arc-shaped part (302) that fits the mounting plate (1). The magnet (4) is located in the slot (305), and the mounting plate (1) forms a limit for the magnet (4).

8. The sectorally arranged arc extinguishing device according to claim 7, characterized in that: A screw hole (306) is provided on the first arc-shaped part (302), and the mounting plate (1) and the first arc-shaped part (302) are fixedly connected by bolts.

9. The sectoral arc-shorting device according to any of claims 1-8, characterized in that: The depth of the trapezoidal notch (201) is greater than that of the socket (301).

10. The sectoral arc extinguishing device according to any of claims 1-8, characterized in that: It further includes an arcing piece (5). The arcing piece (5) is arranged on one side of a number of arc extinguishing grid plates (2) and is distributed in a fan-shaped layout with the number of arc extinguishing grid plates (2). The arcing piece (5) has an arcing part (501) extending between the two gas generating plates (3), and the arcing part (501) is used to cooperate with the moving contact in the opening position to generate an arc.

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