Arc extinguish chamber of circuit breaker

Abstract

The utility model discloses an arc extinguish chamber of a circuit breaker, which comprises an arc extinguish cover, insulating parts and arc extinguish grid sheets, the insulating parts comprise a first insulating part and a second insulating part, the surfaces of the first insulating part and the second insulating part are respectively provided with a plurality of grid sheet clamping grooves and exhaust clamping grooves, and the exhaust clamping grooves are positioned above the grid sheet clamping grooves. A plurality of arc extinguishing grid pieces are clamped between the first insulating part and the second insulating part through grid piece clamping grooves, the two sides of the inner wall of the lower end of the arc extinguishing cover make contact with the outer wall of the first insulating part and the outer wall of the second insulating part respectively, and a plurality of exhaust plates are clamped between the first insulating part and the second insulating part through exhaust clamping grooves. And the exhaust plate is positioned right above the arc extinguishing grid plate. According to the utility model, the arc extinguish chamber has the advantages of reliable overall connection, high connection strength, reliable insulation part connection and no falling risk.

Description

Technical Field

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

[0002] Circuit breakers are a crucial component of electrical distribution equipment, primarily used in industrial low-voltage power systems. They connect and disconnect current in power grid circuits and protect power lines and power equipment from faults such as overloads, undervoltages, short circuits, and single-phase grounding. The circuit breaker's interruption of overload or short-circuit currents is primarily accomplished through the arc extinguishing chamber installed within the circuit breaker. When a fault current exceeds the breaker's set protection range, the trip mechanism activates, rapidly opening the breaker's moving and stationary contacts. The voltage across the moving and stationary contacts then causes a discharge in the air, generating a high-temperature arc. The arc's combustion causes the air temperature within the arc extinguishing device to rise sharply, accelerating air ionization. Furthermore, the arc, driven by the magnetic field and fluid effects within the arc extinguishing chamber, is divided into multiple short arcs by arc-isolating grids. The metal arc-isolating grids enhance the arc's deionization effect, reducing the arc size and rapidly increasing the voltage, ultimately extinguishing the arc.

[0003] However, traditional arc extinguishing chambers have the following problems: 1. The arc extinguishing hood is riveted together with rivets, and the connection strength is poor; 2. The insulating parts and the arc extinguishing hood are connected by a hot riveting process, which is unreliable and has the risk of falling off. Summary of the Invention

[0004] The purpose of the present utility model is to provide an arc extinguishing chamber of a circuit breaker to solve the following problems of the traditional arc extinguishing chamber mentioned in the above background technology: 1. The arc extinguishing chamber is riveted by rivets, and the connection strength is poor; 2. The insulating part and the arc extinguishing chamber are connected by a hot riveting process, and the connection is unreliable and there is a risk of falling off.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an arc extinguishing chamber of a circuit breaker, comprising an arc extinguishing hood, an insulating member and an arc extinguishing grid, the insulating member comprising a first insulating member and a second insulating member, the surfaces of the first insulating member and the second insulating member are both provided with a plurality of grid clip grooves and an exhaust clip groove, and the exhaust clip groove is located above the grid clip groove, a plurality of arc extinguishing grids are clipped between the first insulating member and the second insulating member through the grid clip groove, the inner wall of the lower end of the arc extinguishing hood is in contact with the outer walls of the first insulating member and the second insulating member on both sides, a plurality of exhaust plates are clipped between the first insulating member and the second insulating member through the exhaust clip groove, and the exhaust plates are located directly above the arc extinguishing grids.

[0006] Preferably, protrusions adapted to the grid clamping grooves are fixedly connected to both sides of the arc-extinguishing grid, and the protrusions are clamped in the grid clamping grooves.

[0007] Preferably, a plurality of connecting rods are fixedly connected to the upper inner wall of the first insulating member, a connecting hole is provided on the surface of the second insulating member at a position opposite to the connecting rod, and a connecting rod is plugged into the connecting hole, and a threaded hole is provided on the surface of the connecting rod.

[0008] Preferably, a fixing hole is opened on one side of the outer wall of the arc extinguishing hood at a position relative to the connecting rod, and the arc extinguishing hood and the insulating member are connected by fastening screws passing through the fixing hole and the threaded hole to achieve connection and fixation between the arc extinguishing hood and the insulating member.

[0009] Preferably, a screw hole plug is sleeved in the fixing hole.

[0010] Preferably, a plurality of exhaust channels are provided on the top of the outer wall of the arc extinguishing hood.

[0011] Preferably, the grid clipping grooves are distributed in a disordered structure, and adjacent arc-extinguishing grids of a plurality of the arc-extinguishing grids are not designed to be at the same level.

[0012] Preferably, a plurality of exhaust holes are provided on the surface of the exhaust plate.

[0013] Beneficial effects

[0014] Compared with the existing technology, the beneficial effects of the present invention are:

[0015] The arc extinguishing cover of the utility model is an integrated structure and is fixedly connected to the insulating part by fastening screws. The insulating part is assembled by the first insulating part, the second insulating part and the protrusions on both sides of the arc extinguishing grid and then riveted together. The fixed connection between the arc extinguishing cover and the insulating part is achieved by fastening screws, so that the overall connection of the arc extinguishing chamber is reliable, the connection strength is high, the insulating part is reliably connected, and there is no risk of falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0019] 1. Arc extinguishing hood; 2. Insulation; 3. Arc extinguishing grid; 4. Exhaust plate; 5. Fastening screws; 6. Screw hole plugs;

[0020] 11. Fixing hole; 12. Exhaust channel; 21. First insulating member; 22. Second insulating member;

[0021] 23. Grid clip slot; 24. Exhaust clip slot; 25. Connecting hole; 26. Connecting rod; 27. Threaded hole;

[0022] 31. Bump; 41. Exhaust hole. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "front," "back," "inner," "outer," "vertical," and "horizontal" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0025] like Figure 1-3 It is a structural diagram of an arc extinguishing chamber of a circuit breaker in a preferred embodiment of the present invention. In this embodiment, an arc extinguishing chamber of a circuit breaker includes an arc extinguishing cover 1, an insulating member 2 and an arc extinguishing grid 3. The insulating member 2 includes a first insulating member 21 and a second insulating member 22. The first insulating member 21 and the second insulating member 22 are made of gas-generating materials. When the arc temperature is too high, the gas-generating materials volatilize gas, effectively and quickly helping to cool the arc, improve the arc extinguishing effect and speed up the arc extinguishing time. Several A grid clip groove 23 and an exhaust clip groove 24 are provided, and the exhaust clip groove 24 is located above the grid clip groove 23. A plurality of arc-extinguishing grids 3 are clamped between the first insulating member 21 and the second insulating member 22 through the grid clip groove 23. Both sides of the inner wall of the lower end of the arc-extinguishing cover 1 are in contact with the outer walls of the first insulating member 21 and the second insulating member 22 respectively. A plurality of exhaust plates 4 are clamped between the first insulating member 21 and the second insulating member 22 through the exhaust clip groove 24. The exhaust plates 4 are insulating epoxy laminates, and the exhaust plates 4 are located directly above the arc-extinguishing grids 3.

[0026] In this embodiment, both sides of the arc extinguishing grid 3 are fixedly connected with protrusions 31 adapted to the grid clip groove 23, and the protrusions 31 are clipped into the grid clip groove 23. After the protrusions 31 are clipped into the matching grid clip groove 23, the protrusions 31 are riveted by riveting so that the protrusions 31 can be firmly connected to the surfaces of the first insulating member 21 and the second insulating member 22.

[0027] In this embodiment, a number of connecting rods 26 are fixedly connected to the upper inner wall of the first insulating member 21, a connecting hole 25 is provided on the surface of the second insulating member 22 at a position relative to the connecting rod 26, and a connecting rod 26 is plugged into the connecting hole 25, a threaded hole 27 is provided on the surface of the connecting rod 26, and a fixing hole 11 is provided on one side of the outer wall of the arc extinguishing cover 1 at a position relative to the connecting rod 26, the arc extinguishing cover 1 and the insulating member 2 are connected by fastening screws 5 passing through the fixing holes 11 and the threaded holes 27, so as to realize the connection and fixation of the arc extinguishing cover 1 and the insulating member 2; through the above-mentioned structural design, the arc extinguishing cover 1 is an integrated structure and is fixedly connected to the insulating member 2 by the fastening screws 5, the insulating member 2 is formed by the first insulating member 21 and the second insulating member 2 being plugged into the connecting hole 25 by the connecting rod 26, and the fixed connection between the arc extinguishing cover 1 and the insulating member 2 is realized by the fastening screws 5, so that the overall connection of the arc extinguishing chamber is reliable, the connection strength is high, the insulating member is reliable, and there is no risk of falling off.

[0028] In this embodiment, a screw hole plug 6 is sleeved in the fixing hole 11. This structural design plays a role in strengthening insulation.

[0029] In this embodiment, a plurality of exhaust channels 12 are provided on the top of the outer wall of the arc extinguishing cover 1. This structural design makes it easier for the arc in the arc extinguishing chamber to eject, thereby improving the arc extinguishing efficiency of the arc extinguishing chamber and extending the service life of the entire circuit breaker.

[0030] In this embodiment, the grid engaging grooves 23 are distributed in a disordered structure, and adjacent arc-extinguishing grids 3 are not designed to be at the same level. This structural design can play a role in dividing the arc.

[0031] In this embodiment, a plurality of exhaust holes 41 are opened on the surface of the exhaust plate 4 . The exhaust holes 41 punched on the exhaust plate 4 are used to discharge arc gas.

[0032] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. An arc extinguishing chamber of a circuit breaker, comprising an arc extinguishing cover (1), an insulating member (2) and an arc extinguishing grid (3), characterized in that: The insulating member (2) comprises a first insulating member (21) and a second insulating member (22); a plurality of grid clipping grooves (23) and an exhaust clipping groove (24) are provided on the surfaces of the first insulating member (21) and the second insulating member (22); the exhaust clipping grooves (24) are located above the grid clipping grooves (23); a plurality of arc-extinguishing grids (3) are clipped between the first insulating member (21) and the second insulating member (22) via the grid clipping grooves (23); both sides of the inner wall of the lower end of the arc-extinguishing cover (1) are in contact with the outer walls of the first insulating member (21) and the second insulating member (22) respectively; a plurality of exhaust plates (4) are clipped between the first insulating member (21) and the second insulating member (22) via the exhaust clipping grooves (24); and the exhaust plates (4) are located directly above the arc-extinguishing grids (3).

2. The arc extinguishing chamber of a circuit breaker according to claim 1, characterized in that: Both sides of the arc-extinguishing grid (3) are fixedly connected with protrusions (31) adapted to the grid clamping groove (23), and the protrusions (31) are clamped in the grid clamping groove (23).

3. The arc extinguishing chamber of a circuit breaker according to claim 1, characterized in that: A plurality of connecting rods (26) are fixedly connected to the upper inner wall of the first insulating member (21); a connecting hole (25) is provided on the surface of the second insulating member (22) at a position relative to the connecting rod (26); a connecting rod (26) is plugged into the connecting hole (25); and a threaded hole (27) is provided on the surface of the connecting rod (26).

4. The arc extinguishing chamber of a circuit breaker according to claim 1, characterized in that: A fixing hole (11) is provided on one side of the outer wall of the arc extinguishing hood (1) at a position relative to the connecting rod (26); the arc extinguishing hood (1) and the insulating member (2) are connected via a fastening screw (5) passing through the fixing hole (11) and the threaded hole (27), thereby achieving connection and fixation between the arc extinguishing hood (1) and the insulating member (2).

5. The arc extinguishing chamber of a circuit breaker according to claim 4, characterized in that: A screw hole plug (6) is sleeved in the fixing hole (11).

6. The arc extinguishing chamber of a circuit breaker according to claim 4, characterized in that: A plurality of exhaust passages (12) are provided on the top of the outer wall of the arc extinguishing cover (1).

7. The arc extinguishing chamber of a circuit breaker according to claim 1, characterized in that: The grid plate clamping grooves (23) are distributed in a disordered structure, and adjacent arc-extinguishing grid plates (3) of a plurality of the arc-extinguishing grid plates (3) are not designed to be at the same level.

8. The arc extinguishing chamber of a circuit breaker according to claim 1, characterized in that: A plurality of exhaust holes (41) are provided on the surface of the exhaust plate (4).

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